CN103043860B

Movatterモバイル変換

Info

Publication number: CN103043860B
Application number: CN201210573050.XA
Authority: CN
Inventors: 雷学军
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-12-26
Filing date: 2012-12-26
Publication date: 2014-06-04
Anticipated expiration: 2032-12-26
Also published as: CN103043860A

Abstract

The invention discloses leachate utilizing equipment and method in a biomass landfilling process. The invention adopts the principle as follows: according to the pH value of leachate, NH4+ in the leachate in an alkaline environment is converted into free NH3; after free ammonia nitrogen is removed through an ammonia nitrogen air stripping tower, microbial fermentation is carried out on the leachate in an acid environment so as to generate great methane overflow; the methane is aerated and oxidated; and the methane reaches the standard through reverse osmosis filtration and then is discharged. Through the process, the free ammonia nitrogen is finally converted into ammonium sulfate, the methane is purified into high-concentration compressed methane gas. According to the invention, after the treatment, the ammonia and the methane in the leachate are sufficiently utilized and the leachate is treated to meet standard without causing pollution to water body; and the leachate utilizing equipment and method in the biomass landfilling process, disclosed by the invention, has the advantages of high effectiveness in cleaning, economic efficiency, simplicity and broad application prospect.

Description

In a kind of biomass landfill process, percolate utilizes Apparatus and method for

Technical field

The invention belongs to biomass landfill liquid and utilize technical field, be specifically related to percolate in a kind of biomass landfill process and utilize Apparatus and method for.

Background technology

After biomass landfill, under the effect of microorganism, form percolate at landfill yard.The composition of percolate is of a great variety, water quality complexity; Pollutant levels are high and variation range is large; Water quality and quantity changes greatly; Ammonia-nitrogen content is high.Percolate permeates downwards by landfill place on the one hand, and along with time lengthening, the soil under landfill yard is when to majority of organic pollutants, absorption reaches capacity, and pollutent can be done fan-shaped diffusion along direction of groundwater flow, has caused the pollution to underground water.On the other hand through refuse landfill thrust-augmenting nozzle drainage percolate out, if be directly used in field irrigation or enter rivers and lakes without processing.Enter various organic pollutants, the inorganic pollutant in river or farmland with percolate, can make hydrobiont and farm crop be polluted, and by food chain and ecotope, HUMAN HEALTH is produced to harm.In percolate, ammonia, nitrogen and organic machine thing can extract the material such as ammonium sulfate, methane.Ammonium sulfate is a kind of good nitrogenous fertilizer, can make shoot and leaf growth vigorous, improves fruit quality and output, strengthens the resistivity of crop to disaster.Can carry out replacement(metathesis)reaction with salt and manufacture ammonium chloride, generate tschermigite with Tai-Ace S 150 effect, manufacture refractory materials with together with boric acid etc.Add in electroplate liquid and can increase electroconductibility.The catalyzer of food dark reddish brown, the nitrogenous source of culturing yeast bacterium in fresh yeast production, acid dyeing dyeing auxiliaries, leather deliming agent.Also can be used for brewage, chemical reagent and store battery production etc.Rare earth mining is made raw material with ammonium sulfate, adopts ion exchange form the rare earth exchanged in the soil of ore deposit out.Ammonium sulfate is also a lot of in purposes biologically, can maximum protected protein activity in protein purification process.Methane is good fuel, also can be used as solar cell, the carbon source of amorphous silicon film chemical vapor deposition, and the synthetic raw materials for production of medication chemistry.Biomass landfill is exactly that the carbonic acid gas landfill that Plant Light cooperation is absorbed arrives underground, reduce the content of carbonic acid gas on the earth, but the current Apparatus and method for that does not also utilize biomass landfill to reduce the action of Greenhouse effect both at home and abroad and utilize percolate in biomass landfill process.

Summary of the invention

The present invention is intended to overcome the deficiencies in the prior art, provide percolate in a kind of biomass landfill process to utilize Apparatus and method for, process the stench of percolate generation in biomass landfill process and the pollution to water body with this Apparatus and method for, reduce the pollution of biomass landfill to environment.

In order to achieve the above object, technical scheme provided by the invention is:

In a kind of biomass landfill process, percolate utilizes equipment, comprises diafiltration liquid pool; Described diafiltration liquid pool is communicated with mechanical grille by A pipeline; Described mechanical grille be all communicated with pond; Describedly all be communicated with liming vat by B pipeline with top, pond, all pass through C pipeline with pond and be communicated with ammonia-nitrogen desorption top of tower; Described ammonia-nitrogen desorption tower bottom is provided with blower fan, and ammonia-nitrogen desorption tower bottom is communicated with acidification pool, and ammonia-nitrogen stripping tower top is communicated with Ammonia recovery tower bottom by D pipeline; Described Ammonia recovery top of tower is provided with vapor pipe, and Ammonia recovery tower bottom is provided with ammonium sulfate recovery tube, and Ammonia recovery tower bottom is communicated with sulfuric acid tank; Described sulfuric acid tank is communicated with Ammonia recovery top of tower by E pipeline; Described sulfuric acid tank is communicated with acidification pool by F pipeline;

Described acidification pool is communicated with anaerobic reation pool bottom by G pipeline; Described anaerobic reation pool top is communicated with methane recovery tower by H pipeline; Described methane recovery tower is provided with methane delivery port and Waste gas outlet;

Described anaerobic reation pool top is communicated with medium sediment pool by I pipeline; Described medium sediment pool is communicated with biological contact oxidation tower bottom by J pipeline; Described biological contact oxidation tower top is communicated with second pond; Described second pond is communicated with reverse osmosis membrane apparatus by K pipeline; Described reverse osmosis membrane apparatus is communicated with finished product water tank;

Described anaerobic reation pool bottom, medium sediment pool bottom and second pond bottom are communicated with A sludge pump by L pipeline, M pipeline and N pipeline respectively, A sludge pump is communicated with sludge thickener, sludge thickener is communicated with water extracter, and the pipeline that described sludge thickener is communicated with water extracter is provided with B sludge pump;

Described sludge thickener and water extracter are communicated with B diafiltration liquid pump by O pipeline and P pipeline respectively, described B diafiltration liquid pump with all with pond bottom be communicated with;

Described A, C, D, G, I, J, K, O and P pipeline are provided with percolate control valve; Described C, G and J pipeline are provided with A diafiltration liquid pump; Described L, M and N pipeline are provided with mud control valve; Described ammonium sulfate recovery tube is provided with ammonium sulfate recovery valve and ammonium sulfate recovery pump; Described B pipeline is provided with lime slurry control valve; Described E and F pipeline are provided with sulphuric acid soln control valve; Described E pipeline is provided with sulphuric acid soln pump; Described K pipeline is provided with high-pressure pump; Described H pipeline is provided with gas control valve.

Wherein, described methane recovery tower methane equipped at outlet port is provided with methane control valve, and methane recovery tower Waste gas outlet place is provided with exhaust emission valve; Described finished product water tank bottom is provided with water discharge valve; Described sludge thickener is the round pond of 5～20 meters of diameters, is provided with stirrer in sludge thickener.

Wherein, described mechanical grille, Jun Hechi, liming vat, ammonia-nitrogen stripping tower, acidification pool, Ammonia recovery tower, anaerobic reation pool, methane recovery tower, medium sediment pool, biological contact oxidation tower, second pond, reverse osmosis membrane apparatus, sludge thickener and water extracter are existing commercially available equipment.

Specifically, mechanical grille: as the product of the GSG series of the HG series of environment-friendly filler company limited of Yixing City Haixing County production, the production of Shandong Bel Environmental Protection Technology Co., Ltd, Jiangsu Peng Jin environmental protection equipment company limited, nearly ten production of units of Changsha machine works; All and pond: with brick cut, pond mud, aquarium, metal pool all can; Liming vat: with brick cut, pond mud, aquarium, metal pool all can; Ammonia-nitrogen stripping tower: as the product of Nanjing Yi Zhiyuan company, Wuxi prosperous Cheng Long's environmental protection equipment company limited, Shandong Bel Environmental Protection Technology Co., Ltd, nearly ten production of units of Changsha machine works; Acidification pool: with brick cut, pond mud, aquarium, metal pool all can: Ammonia recovery tower: as Jiangsu steps the product that digests work, the south of the River, Wuxi reactor factory, San Da Water Management Equipment Ltd. of Zhuhai City, nearly ten production of units of Changsha machine works; Anaerobic reation pool: as the product of the IC of Shandong origin environmental science and technology company limited, AE system product, Jinan Na Chuan environmental protection development in science and technology limited liability company, nearly ten production of units of Changsha machine works; Methane recovery tower: as Jiangsu steps the product that digests work recovery tower, the south of the River, Wuxi reactor factory, nearly ten production of units of Changsha machine works; Medium sediment pool: with brick cut, pond mud, aquarium, metal pool all can; Biological contact oxidation tower is existing commercially available; Second pond: with brick cut, pond mud, aquarium, metal pool all can; Reverse osmosis membrane apparatus: as the product of Beijing water treating equipment company, Beijing safe and sound Jiu Sheng company, tens of production of units of the special shield environmental protection in Changsha; Sludge thickener: with brick cut, pond mud, aquarium, metal pool all can: water extracter: the product of as prosperous in Lishui City constant force centrifugal machine equipment company limited, Nantong safe environment-friendly engineering equipment company limited of China Nantong good environment-friendly engineering equipment company limited, nearly ten production of units of Changsha machine works.

The present invention also provides percolate in a kind of biomass landfill process based on aforesaid device to utilize method, comprises the steps:

(1) percolate in biomass collection landfill process is to diafiltration liquid pool;

(2) percolate of step (1) being collected is through mechanical grille and all with behind pond send into ammonia-nitrogen stripping tower denitrogenation, and the ammonia that denitrogenation is produced reclaims through Ammonia recovery tower; Wherein, when percolate is when all with pond, by the lime slurry adjusting in liming vat all with pond in pH value;

(3) by the percolate after denitrogenation through acidification pool acidifying, anaerobic reactor fermentative degradation, by fermentative degradation produce methane after the removal of impurities of methane recovery tower, store; It is concentrated that the mud that fermentative degradation is formed is sent into sludge thickener;

(4) clear liquor after fermentative degradation is sent in biological contact oxidation tower and is oxidized after medium sediment pool clarification, then after second pond clarification, send into reverse osmosis membrane apparatus and filter, the clear water after filtration is disposed to finished product water tank; Mud in medium sediment pool and second pond is sent into sludge thickener concentrated;

(5) the thickened solid particle in sludge thickener is generated to mud cake through water extracter dehydration, by mud cake and new biomass landfill again, the sewage of deviating from be again back to all with pond in.

Seven kinds, described step (1) is by spacing 10～15m, horizontal leachate collection groove to be set in the time of landfill biomass, by the vertical leachate collection well that spacing 15～20m arranges with laterally leachate collection groove is connected; The liquid that biomass produce at the decomposition course that rots, by horizontal leachate collection groove and vertical leachate collection well, is pooled in diafiltration liquid pool.

Described step (2) is the mechanical grille of flowing through of the percolate in diafiltration liquid pool, flows into all and pond (be an outdoor cement pit because of diafiltration liquid pool, described macrobead foreign material refer to the floating matters such as silt, stone and leaf, pasture and water) after removing macrobead foreign material; Under lime slurry control valve is automatically controlled, the lime slurry in liming vat flows into all and pond, regulate all with pond in PH be 10.5～11; With the diafiltration liquid pump on C pipeline by all with pond in diafiltration liquid pump spray downwards to ammonia-nitrogen desorption top of tower and from ammonia-nitrogen desorption top of tower, thereby denitrogenation (ammonia nitrogen in waste water mainly with ammonium ion (NH₄⁺) and free ammonia (NH₃) state existence, its equilibrium relationship is as follows: NH₃+ H₂o-NH₄⁺+ OH^-this relation is subject to the impact of pH value, and in the time that pH value is high, balance is moved to the left, and the ratio of free ammonia increases.When normal temperature, in the time that pH value is 7 left and right, ammonia nitrogen great majority exist with ammonium ion state, and pH is while being 11 left and right, and free ammonia roughly accounts for 98%, and free ammonia is easy to overflow from water, as aeration in addition, can impel ammonia to overflow from water); With blower fan by denitrogenation produce ammonia send into Ammonia recovery tower from Ammonia recovery tower bottom; With sulphuric acid soln pump, by the sulfuric acid in sulfuric acid tank, (tower process is produced sulfate of ammoniac, and conventionally adopting concentration is 75%～80% sulfuric acid; Contact process is produced sulfate of ammoniac, adopts the sulfuric acid that concentration is 90%～95%) send into Ammonia recovery tower, thereby being reacted, sulfuric acid and ammonia reclaim ammonia; Uncontaminated air after deamination is discharged from Ammonia recovery tower upper end vapor pipe.

Described step (3) is that the percolate after denitrogenation is sent into acidifying in acidification pool (acidifying refers to that percolate after denitrogenation is in acidification pool, and acid adding regulates 6～7 by pH value, stops percolate after 1～2 hour and is just acidity); Sulfuric acid in sulfuric acid tank enters by sulphuric acid soln control valve that in acidification pool, to regulate PH be 6～7, makes the organism in percolate be converted into voltaile fatty acid; With the diafiltration liquid pump on G pipeline, the percolate after acidifying is sent into anaerobic reactor from anaerobic reactor bottom and carry out fermentative degradation (fermentative degradation refers to the effect of percolate anaerobe, the various complicated organic molecule in percolate is changed into the process of the material such as methane, carbonic acid gas); The methane that fermentative degradation is produced is sent in methane recovery tower and is compressed and be stored in methane hold tank after remove impurity with active carbon; Send in sludge thickener and concentrate with the mud that sludge pump forms fermentative degradation.

Described step (4) is that the clear liquor after fermentative degradation is sent into medium sediment pool clarification, (in biological contact oxidation tower, oxidation refers to the filler that certain density is set in biological contact oxidation tower with the diafiltration liquid pump on J pipeline, the clear liquor in medium sediment pool to be pumped into oxidation in biological contact oxidation tower, this is conventional means, under the condition of oxygen abundance, microorganism forms microbial film on the surface of burying material, the whole fillers of percolate submergence also extensively contact with the microbial film on filler, by the metabolism of microorganism, organism in percolate is converted into new material), sewage is further purified, clear liquor after oxidation is sent in second pond and clarified, by high-pressure pump, the clear liquor in second pond is sent into reverse osmosis membrane apparatus and filter, the clear water that filtration is obtained drains into finished product water tank, mud in medium sediment pool and second pond is sent into sludge thickener concentrated.

Below in conjunction with principle and advantage, the invention will be further described:

The principle of the invention is according to percolate pH value, NH in percolate under alkaline environment₄⁺change into free state NH₃, after ammonia-nitrogen stripping tower is removed free ammonia nitrogen, in sour environment, through microorganism fermentation, the biogas producing when large overflows, then through aeration oxidation, osmosis filtration rear discharge up to standard.Finally become ammonium sulfate by this technique ammonia nitrogen that will dissociate, methane purification becomes high density compressed methane gas.

Percolate gravity flow in diafiltration liquid pool is by mechanical grille, and the present invention adopts and integrates trash rack and trash rake, and the rotary machine grid that can remove contamination continuously, take trash rack as basis, by around grid circumversion chain, Rack rake being driven, is realized and blocked dirt and remove contamination.Every 1.5～2.5 meters of one tooth harrows, 4～8 ms/min of tooth harrow linear velocities.Tooth harrow inserts grizzly bar 5～20cm, and the dirt being attached on grizzly bar is taken to trash rake top, completes upset and unloads dirty action, keeps water-carrying section clean without dirt.After mechanical grille is removed macrobead foreign material, flow into all and pond, lime slurry is by lime slurry control valve robot control system(RCS), automatically regulates all and pond pH value, the suitable employing 10.5～11 of pH value.Diafiltration liquid pump by all with pond in percolate spray downwards from ammonia-nitrogen desorption top of tower, free state NH under the effect of blower fan₃from ammonia-nitrogen stripping tower, overflow.Ammonia tangentially enters Ammonia recovery tower from tower body below inlet mouth, under the dynamic action of blower fan, evenly rises to packing material absorbing section, water, sulfuric acid generation chemical reaction in the surperficial ammonia of filler and liquid phase, generation NH₃-OH, (NH₄)₂sO₄, at the bottom of flowing to tower, filler resistance is no more than 40 millimeter water column under nominal air delivery.The ammonia gas not absorbing completely continues to rise and enters spray section, and absorption liquid, from the ejection at a high speed of uniform nozzle, forms countless fine mist, fully mixes and contacts with gas, continues chemical reaction occurs, and can reach 85%～95% to the assimilated efficiency of ammonia.The process contacting in spray section and packing section two is also the process of heat and mass transfer, and temperature is controlled at 48～52 ℃, and the topmost of tower body is demist section, and uncontaminated air after treatment enters atmosphere from Ammonia recovery tower upper end vapor pipe.

Enter in acidification pool through ammonia-nitrogen stripping tower percolate after treatment, by sulphuric acid soln control valve, automatically regulate pH value to 6～7, make the organism in percolate be converted into voltaile fatty acid.Under the effect of diafiltration liquid pump, enter from anaerobic reactor bottom, pass through anaerobic reactor from bottom to top, majority of organic pollutants is degraded to methane and carbon dioxide through anaerobically fermenting during this time, because of the stirring of current and bubble, form a sludge suspension layer, methane is derived from anaerobic reactor top, and the automatic landing of mud granule is settled down to anaerobic reactor bottom, enter sludge thickener through sludge pump, clear liquor flows into medium sediment pool from anaerobic reactor middle and upper part.Described methane is in methane recovery tower after inhaling remove impurity with active carbon, and compression is stored in methane hold tank.

Clear liquor in medium sediment pool, under the effect of diafiltration liquid pump, enters in biological contact oxidation tower, and under the condition of aerobic, sewage contacts repeatedly with the microbial film of filling surface, sewage is obtained and purify, and the microbial film coming off flows to second pond with the water after purifying.

Clarification in second pond is under the effect of high-pressure pump, and after filtering by reverse osmosis membrane apparatus, the percolate producing in primordial matter landfill process becomes clear water, is disposed to finished product water tank.

Mud in anaerobic reactor, medium sediment pool, second pond, by sludge pump, enters sludge thickener, and the similar settling tank of structure of concentration basin is inside established Mixing Machine and done slowly to stir.10～14 hours residence time in concentration basin of mud.In concentration basin, the solid particulate power of relying on for support declines, and moisture is extruded from mud, and thickened sludge is from discharging at the bottom of pond, and sludge water is excessive or flow out from pond side water outlet from pond face crest of weir, receives and refills Jun Hechi through percolate blowback.

In described sludge thickener, thickened solid particulate matter is through water extracter processing, the mud cake after dehydration and new biomass landfill again, and sewage is received and is refilled Jun Hechi through percolate blowback.

In a word, the present invention adopts " denitrogenation-efficient anaerobic-catalytic oxidation " technique, and whole method comprises ammonia-nitrogen desorption, and sour absorption process produces ammonium sulfate, and efficient anaerobe decomposes generation methane and aerobic treatment anaerobic pond water outlet three parts.Biomass arrange active leachate collecting device in the time of landfill, after percolate gravity flow in diafiltration liquid pool is filtered by mechanical grille, through denitrogenation, except methane, aeration, oxidation, precipitation, filtration, water outlet rear discharge up to standard, the mud that system produces is sent into sludge thickener, after concentrated, use sludge dewatering equipment press filtration, mud cake is backfill again, and filtrate Hui Jun and pond is processed again.

After the present invention processes, ammonia, methane in percolate are fully used, and percolate obtains processing up to standard, can not produce pollution to water body, and clean and effective of the present invention, economic simple, has a extensive future.

Accompanying drawing explanation

Fig. 1 is the structural representation that in biomass landfill process of the present invention, percolate utilizes equipment.

In figure: 1-diafiltration liquid pool, 2-mechanical grille, 3-Jun Hechi, 4-liming vat, 5-ammonia-nitrogen stripping tower, 6-acidification pool, 7-Ammonia recovery tower, 8-sulfuric acid tank, 9-anaerobic reactor, 10-methane recovery tower, 11-biological contact oxidation tower, 12-medium sediment pool, 13-second pond, 14-reverse osmosis membrane apparatus, 15-finished product water tank, 16-sludge thickener, 17-water extracter, 18-B diafiltration liquid pump, 19-A diafiltration liquid pump, 20-ammonium sulfate recovery pump, 21-sulphuric acid soln pump, 22-A pipeline, 23-B pipeline, 24-high-pressure pump, 25-A sludge pump, 26-B sludge pump, 27-blower fan, 28-percolate control valve, 29-lime slurry control valve, 30-ammonium sulfate recovery tube, 31-D pipeline, 32-ammonium sulfate recovery valve, 33-sulphuric acid soln control valve, 34-E pipeline, 35-F pipeline, 36-G pipeline, 37-gas control valve, 38-exhaust emission valve, 39-methane control valve, 40-H pipeline, 41-mud control valve, 42-I pipeline, 43-J pipeline, 44-water discharge valve, 45-K pipeline, 46-L pipeline, 47-M pipeline, 48-vapor pipe, 49-N pipeline, 50-O pipeline, 51-P pipeline, 52-C pipeline.

Embodiment

Describe the preferred technical scheme of the present invention below in detail, but provided embodiment is provided.

embodiment 1

Referring to Fig. 1, in described biomass landfill process, percolate utilizes equipment to comprise diafiltration liquid pool 1; Described diafiltration liquid pool 1 is communicated with mechanical grille 2 by Apipeline 22; Described mechanical grille 2 be all communicated with pond 3; Describedly all be communicated withliming vat 4 byB pipeline 23 with 3 tops, pond, be all communicated with ammonia-nitrogen stripping tower 5 tops byC pipeline 52 with pond 3; Described ammonia-nitrogen stripping tower 5 bottoms are provided with blower fan 27, and ammonia-nitrogen stripping tower 5 bottoms are communicated withacidification pool 6, and ammonia-nitrogen stripping tower 5 tops are communicated with Ammonia recovery tower 7 bottoms by D pipeline 31; Described Ammonia recovery tower 7 tops are provided with vapor pipe 48, and Ammonia recovery tower 7 bottoms are provided with ammoniumsulfate recovery tube 30, and Ammonia recovery tower 7 bottoms are communicated with sulfuric acid tank 8; Described sulfuric acid tank 8 is communicated with Ammonia recovery tower 7 tops byE pipeline 34; Described sulfuric acid tank 8 is communicated withacidification pool 6 by F pipeline 35;

Describedacidification pool 6 is communicated with anaerobic reation pool 9 bottoms by G pipeline 36; Described anaerobic reation pool 9 tops are communicated withmethane recovery tower 10 by H pipeline 40; Describedmethane recovery tower 10 is provided with methane delivery port and Waste gas outlet;

Described anaerobic reation pool 9 tops are communicated with medium sediment pool 12 by I pipeline 42; Described medium sediment pool 12 is communicated with biological contact oxidation tower 11 bottoms byJ pipeline 43; Described biological contact oxidation tower 11 tops are communicated with second pond 13; Described second pond 13 is communicated with reverse osmosis membrane apparatus 14 by K pipeline 45; Described reverse osmosis membrane apparatus 14 is communicated with finishedproduct water tank 15;

Described anaerobic reation pool 9 bottoms, medium sediment pool 12 bottoms and second pond 13 bottoms are communicated with A sludge pump 25 by L pipeline 46, M pipeline 47 and N pipeline 49 respectively, A sludge pump 25 is communicated withsludge thickener 16,sludge thickener 16 is communicated withwater extracter 17, and the pipeline that describedsludge thickener 16 is communicated withwater extracter 17 is provided with B sludge pump 26;

Describedsludge thickener 16 andwater extracter 17 are communicated with B diafiltration liquid pump 18 byO pipeline 50 andP pipeline 51 respectively, described B diafiltration liquid pump 18 be all communicated with 3 bottoms, pond;

Described A, C, D, G, I, J, K, O and P pipeline are provided with percolate control valve 28; Described C, G and J pipeline are provided with A diafiltration liquid pump 19; Described L, M and N pipeline are provided with mud control valve 41; Described ammoniumsulfate recovery tube 30 is provided with ammonium sulfate recovery valve 32 and ammonium sulfate recovery pump; DescribedB pipeline 23 is provided with lime slurry control valve 29; Described E and F pipeline are provided with sulphuric acid soln control valve 33; DescribedE pipeline 34 is provided with sulphuric acid soln pump 21; Described K pipeline 45 is provided with high-pressure pump 24; Described H pipeline 40 is provided with gas control valve 37.

Wherein, describedmethane recovery tower 10 methane equipped at outlet port are provided with methane control valve 39, andmethane recovery tower 10 Waste gas outlet places are provided with exhaust emission valve 38; Described finishedproduct water tank 15 bottoms are provided with water discharge valve 44; Describedsludge thickener 16 is the round pond of 5～20 meters of diameters, insludge thickener 16, is provided with stirrer.

embodiment 2

In biomass landfill process based on aforesaid device, percolate utilizes a method, comprises the steps:

Wherein, described step (1) is by spacing 10～15m, horizontal leachate collection groove to be set in the time of landfill biomass, by the vertical leachate collection well that spacing 15～20m arranges with laterally leachate collection groove is connected; The liquid that biomass produce at the decomposition course that rots, by horizontal leachate collection groove and vertical leachate collection well, is pooled in diafiltration liquid pool; Described step (2) is the mechanical grille of flowing through of the percolate in diafiltration liquid pool, flows into all and pond after removing macrobead foreign material; Under lime slurry control valve is automatically controlled, the lime slurry in liming vat flows into all and pond, regulate all with pond in PH be 10.5～11; With the diafiltration liquid pump on C pipeline by all with pond in diafiltration liquid pump spray downwards to ammonia-nitrogen desorption top of tower and from ammonia-nitrogen desorption top of tower, thereby denitrogenation; With blower fan by denitrogenation produce ammonia send into Ammonia recovery tower from Ammonia recovery tower bottom; With sulphuric acid soln pump, the sulfuric acid in sulfuric acid tank is sent into Ammonia recovery tower, reclaim ammonia thereby sulfuric acid and ammonia are reacted; Uncontaminated air after deamination is discharged from Ammonia recovery tower upper end vapor pipe; Described step (3) is that the percolate after denitrogenation is sent into acidifying in acidification pool; Sulfuric acid in sulfuric acid tank enters by sulphuric acid soln control valve that in acidification pool, to regulate PH be 6～7, makes the organism in percolate be converted into voltaile fatty acid; With the diafiltration liquid pump on G pipeline, the percolate after acidifying is sent into anaerobic reactor from anaerobic reactor bottom and carry out fermentative degradation; The methane that fermentative degradation is produced is sent in methane recovery tower and is compressed and be stored in methane hold tank after remove impurity with active carbon; Send in sludge thickener and concentrate with the mud that sludge pump forms fermentative degradation; Described step (4) is that the clear liquor after fermentative degradation is sent into medium sediment pool clarification, the clear liquor in medium sediment pool is pumped in biological contact oxidation tower and is oxidized with the diafiltration liquid pump on J pipeline, and sewage is further purified; Clear liquor after oxidation is sent in second pond and clarified; By high-pressure pump, the clear liquor in second pond is sent into reverse osmosis membrane apparatus and filter, the clear water that filtration is obtained drains into finished product water tank; Mud in medium sediment pool and second pond is sent into sludge thickener concentrated.

Claims

Described acidification pool (6) is communicated with anaerobic reation pool (9) bottom by G pipeline (36); Described anaerobic reation pool (9) top is communicated with methane recovery tower (10) by H pipeline (40); Described methane recovery tower (10) is provided with methane delivery port and Waste gas outlet;

Described anaerobic reation pool (9) top is communicated with medium sediment pool (12) by I pipeline (42); Described medium sediment pool (12) is communicated with biological contact oxidation tower (11) bottom by J pipeline (43); Described biological contact oxidation tower (11) top is communicated with second pond (13); Described second pond (13) is communicated with reverse osmosis membrane apparatus (14) by K pipeline (45); Described reverse osmosis membrane apparatus (14) is communicated with finished product water tank (15);

Described anaerobic reation pool (9) bottom, medium sediment pool (12) bottom and second pond (13) bottom are communicated with A sludge pump (25) by L pipeline (46), M pipeline (47) and N pipeline (49) respectively, A sludge pump (25) is communicated with sludge thickener (16), sludge thickener (16) is communicated with water extracter (17), and the pipeline that described sludge thickener (16) is communicated with water extracter (17) is provided with B sludge pump (26);

Described sludge thickener (16) and water extracter (17) are communicated with B diafiltration liquid pump (18) by O pipeline (50) and P pipeline (51) respectively, described B diafiltration liquid pump (18) with all and bottom pond (3) be communicated with;

Described A, C, D, G, I, J, K, O and P pipeline are provided with percolate control valve (28); Described C, G and J pipeline are provided with A diafiltration liquid pump (19); Described L, M and N pipeline are provided with mud control valve (41); Described ammonium sulfate recovery tube (30) is provided with ammonium sulfate recovery valve (32) and ammonium sulfate recovery pump; Described B pipeline (23) is provided with lime slurry control valve (29); Described E and F pipeline are provided with sulphuric acid soln control valve (33); Described E pipeline (34) is provided with sulphuric acid soln pump (21); Described K pipeline (45) is provided with high-pressure pump (24); Described H pipeline (40) is provided with gas control valve (37).

2. equipment as claimed in claim 1, is characterized in that, described methane recovery tower (10) methane equipped at outlet port is provided with methane control valve (39), and methane recovery tower (10) Waste gas outlet place is provided with exhaust emission valve (38).

3. equipment as claimed in claim 1, is characterized in that, described finished product water tank (15) bottom is provided with water discharge valve (44).

4. equipment as claimed in claim 1, is characterized in that, described sludge thickener (16) is the round pond of 5～20 meters of diameters, and sludge thickener is provided with stirrer in (16).

5. in the biomass landfill process based on equipment described in claim 1 to 4 any one, percolate utilizes a method, comprises the steps:

6. method as claimed in claim 5, is characterized in that, described step (1) is by spacing 10～15m, horizontal leachate collection groove to be set in the time of landfill biomass, by the vertical leachate collection well that spacing 15～20m arranges with laterally leachate collection groove is connected; The liquid that biomass produce at the decomposition course that rots, by horizontal leachate collection groove and vertical leachate collection well, is pooled in diafiltration liquid pool.

7. method as claimed in claim 5, is characterized in that, described step (2) is the mechanical grille of flowing through of the percolate in diafiltration liquid pool, flows into all and pond after removing macrobead foreign material; Under lime slurry control valve is automatically controlled, the lime slurry in liming vat flows into all and pond, regulate all with pond in PH be 10.5～11; With the diafiltration liquid pump on C pipeline by all with pond in diafiltration liquid pump spray downwards to ammonia-nitrogen desorption top of tower and from ammonia-nitrogen desorption top of tower, thereby denitrogenation; With blower fan by denitrogenation produce ammonia send into Ammonia recovery tower from Ammonia recovery tower bottom; With sulphuric acid soln pump, the sulfuric acid in sulfuric acid tank is sent into Ammonia recovery tower, reclaim ammonia thereby sulfuric acid and ammonia are reacted; Uncontaminated air after deamination is discharged from Ammonia recovery tower upper end vapor pipe.

8. method as claimed in claim 5, is characterized in that, described step (3) is that the percolate after denitrogenation is sent into acidifying in acidification pool; Sulfuric acid in sulfuric acid tank enters by sulphuric acid soln control valve that in acidification pool, to regulate PH be 6～7, makes the organism in percolate be converted into voltaile fatty acid; With the diafiltration liquid pump on G pipeline, the percolate after acidifying is sent into anaerobic reactor from anaerobic reactor bottom and carry out fermentative degradation; The methane that fermentative degradation is produced is sent in methane recovery tower and is compressed and be stored in methane hold tank after remove impurity with active carbon; Send in sludge thickener and concentrate with the mud that sludge pump forms fermentative degradation.

9. method as claimed in claim 5, it is characterized in that, described step (4) is that the clear liquor after fermentative degradation is sent into medium sediment pool clarification, the clear liquor in medium sediment pool is pumped in biological contact oxidation tower and is oxidized with the diafiltration liquid pump on J pipeline, and sewage is further purified; Clear liquor after oxidation is sent in second pond and clarified; By high-pressure pump, the clear liquor in second pond is sent into reverse osmosis membrane apparatus and filter, the clear water that filtration is obtained drains into finished product water tank; Mud in medium sediment pool and second pond is sent into sludge thickener concentrated.