Background technology
In oilfield process, every annual meeting produces substantial amounts of ground sludge, operation greasy filth, big tank bottoms mud and waterProcess the oily sludges such as spoil disposal；Exploration at oil or gas well can be in drilling process, and more and more recover the oil oil baseOr the Advanced Drilling Technology of synthesis base, produce substantial amounts of oil base well drilling detritus simultaneously；Due to discharge in violation of regulations or thingTherefore leakage, every annual meeting produces substantial amounts of greasy dirt and contaminates the soil exceeded standard；It addition, the row such as oil refining, petrochemical industry and iron and steelIndustry, also can produce substantial amounts of oily sludge.Above-mentioned oil-containing solids garbage has been put into National Hazard and has given upGurry register, except land occupation, pollutant also can enter by diffusive migration to soil and groundwaterEcological environment, causes serious environmental hazard, it is therefore necessary to realize harmless treatment and disposal.Oil-containing solidsInnoxious and the recycling treatment of garbage and disposal, be the social responsibility that must fulfil of enterprise and legal responsibility.Due to oil-containing solids garbage containing some oil, therefore, innoxious while recovered oil be again to realize resourceChange the ideal and environmental protection treatment mode utilized, it addition, " oil and gas exploitation industry pollution prevention technique policy "Middle clear stipulaties " should reclaim ground crude oil, and crude Treatment, waste water process the greasy filth (sand) etc. producedIn oily substance, oily sludge resource utilization rate should reach more than 90%, and residual solid refuse should be according to" National Hazard refuse register " and hazardous waste judging standard identification, according to recognition result recycling orHarmlessness disposing ".Therefore, it is badly in need of developing safe and reliable technology and device, the oil field that pile up like a mountain is containedOil solid waste thoroughly realizes innoxious and recycling treatment.Current domestic referential innoxious standard is " oil fieldOily sludge comprehensive utilization Environmental capacity standard " DB23/T 1413-2010, the wherein residue after predetermined processingTPH content is less than 2%, and other indexs are tested by the appraisal and evaluation of regulation.
Owing to oil-containing solids garbage kind is many, complicated component, contains substantial amounts of foreign material simultaneously, therefore processesDifficulty very big, invest relative with operating cost the highest.Except pretreatment minimizing and foreign material sorting process,The treatment technology of recent year experimental study and engineering practice has: solid-liquid leaching method (includes washing and leachingAgent leaches), microbial method (including compost and farming etc.), solidification fill up, recharge stratum and heat treating process (bagInclude burning, superheated steam desorption, Thermal desorption and thermal desorption etc.).It is bigger owing to oil-containing solid waste i.e. containing granuleSand preferable with mechanical strength, again containing the suitable foundry loam not having concrete form or chemical sludge, and has parentThe surface of oil, therefore sand can be processed to the most innoxious by solid-liquid leaching method, but oil, foundry loam and water three are difficult to pointLayer and separation, existence processes thoroughly in actual applications, separative element is difficult to stable operation or leaching agent streamProblem of both the technology such as mistake rate is the biggest and economy.Microbial method needs pollutant dilution and is distributed to oneDetermining degree, need to take substantial amounts of soil, the innoxious cycle is the longest, partial contamination thing such as polycyclic aromatic hydrocarbon andThe Organic substances such as aphthenic acids may the most almost cannot be degraded, it is thus possible to faces bigger environmental risk.Solidification is filled outCompletely being embedded among solid by firming agent by oil, then safety is filled up, but can not finally exempt pollutant again, there is risk in probability that secondary slow release leaches and corresponding environmental liability, additionally oil-containing the highest aqueous needsCuring agent content is the biggest, and the amount of garbage is actual to be increased considerably.Recharge stratum and need applicable stratumSpace, and guarantee will not polluted underground water, finite capacity, there is risk.Burning can make Organic substance thoroughInnoxious, but there is no recovered oil, the form of oil content, water content and solid be there are certain requirements simultaneously,The efficiency that otherwise appreciable impact is burned, meanwhile, the intractability of incineration tail gas is relatively big, causes air pollutionVery risky.Superheated steam desorption method is fully contacted the de-of realization oil with superheated steam after needing to spray solid wasteAttached, the disposal ability that under current technical conditions, equipment can realize is the least, and there is restriction operation steady in a long-termTechnical problem.Thermal desorption technology is ripe at Refining Chemical Industry, at relatively high temperatures, Organic substance can be made abundantThe mixed gas being cracked under room temperature various small molecule hydrocarbon classes, hydrogen and carbon monoxide etc. for gaseous state (resolvesGas), it is possible to achieve innoxious, but the purification of resolution gas more than needed and recycling existing problems, additionally this technologyRequiring the highest to analyzing device, security risk is relatively big, and operation maintenance and management difficulty are higher.Thermal desorption or heatDesorption technique at moderate temperatures, make oil from solid evaporate desorption be recycled, realize simultaneously resource andInnoxious, thermal desorption technology is feasible and reliable in principle, but needs to carry out for technique and deviceInnovative ability is suitable for the process of oil-containing solid waste.
Domestic patent CN101972773A " forced ventilation-auger thermal desorption renovation of organic pollution soilUnit ", CN102069088A " unit of repairing organic contaminated soil by soil ventilation-vertical desorption furnace "With CN102284473A " unit is repaired in drum-type soil thermal desorption " and CN203508590U " swingingSoil Thermal desorbing prosthetic device " disclose thermal desorption processes technology and the dress of a kind of organic polluted soil respectivelyPut, but owing to the character of oil-containing solid waste is dramatically different with soil, heating simultaneously exists inflammable and explosive oil and gas and wavesSend out, process oil-containing solid waste and unit blocking and oil and gas will be caused to explode, additionally there is no the function of recovered oil, dischargeTail gas can cause atmospheric pollution, therefore these three Technology and realize device and be not suitable for processing oil-containing solids,The most also not used for case and the research of oil-containing fixed-end forces.Domestic patent CN103406346A "The method of kind of room temperature desorbing associating chemical oxidation renovation of organic pollution soil and processing unit " disclose one and turn overThrow natural evaporation desorbing add chemical oxidation scheme process organic polluted soil, the method be applicable to volatile andThe removal of oxidizable organic pollution, and contaminated air, be more not suitable for the oil that distillation point is higher and the most oxidizableRemoval.Domestic patent CN103447292A " in-situ thermal desorption treatment technology of a kind of contaminated soil and listUnit " disclose a kind of in-situ thermal desorption treatment technology, this technology is not suitable for that porosity is the lowest, oil-containing equallyThe oil-containing solid waste that aqueous higher and oily distillation point is higher.
Summary of the invention
Based on the problems referred to above, the invention provides a kind of oil-containing solid waste and indirectly heat thermal desorption processing method and dressPut, with the shortcoming overcoming existing THE METHOD OF THERMAL DESORPTION.
In the present invention, oil-containing solid waste indirectly heats thermal desorption processing means and includes the automatic control being uniformly coordinated controlUnit processed, the feed pretreatment units sequentially connected by oil-containing solid waste material load mode, charging metering andProtected location, indirectly heating and thermal desorption unit, at described indirect heating and the desorbing gas and oil of thermal desorption unitGas outlet connects desorption steam isolation of purified unit, in described indirect heating and the discharge outlet of thermal desorption unitConnecting dregs post-processing unit, described indirect heating and thermal desorption unit are by heating cavity and thermal desorption cavity groupBecoming, wherein the heated portion of thermal desorption cavity is placed among described heating cavity, described thermal desorption cavity interiorSpace, portion and the inner space of described heating cavity are that two independences are separated and mutual disconnected cavity.
Described thermal desorption cavity includes cylinder cylindrically, close by sealing device at the two ends of described cylinderClose, be respectively arranged at two ends with charging aperture and discharging opening, in the middle part of described cylinder up at described cylinderConvex oil gas collection chamber of arching upward, is provided with oil gas vent on the wall in described oil gas collection chamber, simultaneously at described cylinderMultiple thermocouple that described cylinder can be carried out thermometric it is provided with in the outside wall surface in body and oil gas collection chamber；InstituteBeing provided with a screw propulsion agitator in stating thermal desorption cavity, the main shaft of this screw propulsion agitator extends describedThe sealing device of barrel end couples with frequency conversion motor.
The step-by-step movement impeller that helical pitch progressively diminishes it is provided with along described main shaft, in described step-by-step movement on described main shaftIt is welded with on impeller and turns over mud plate, on described main shaft, be welded with gravity simultaneously clean chain.
Described charging aperture and discharge outlet are equipped with gas lock, and this gas lock connects nitrogen unit, to described chargingMouth and discharging opening carry out nitrogen-sealed.
Described heating cavity is a steel outer chamber, described steel outer chamber be externally provided with external fuel burner,Fixed gas nozzles, are provided with baffle plate, inwall has been sticked insulating firebrick in described steel outer chamber, exist simultaneouslyDescribed steel outer chamber is provided with chimney.
Described desorption steam isolation of purified unit is arranged on described indirect heating and the oil gas vent of thermal desorption unitPlace, by the vacuum jet pump sequentially connected by pipeline, centrifugal pump, three phase separator, cyclone separator,Dehumidifier and piping filter composition, described vacuum jet pump connects through the oil gas vent of pipeline with thermal desorption cavityLogical, connect with described centrifugal pump, three phase separator simultaneously, the stripping gas outlet of described three phase separator is through pipeRoad connects with described cyclone separator, and the stripping gas outlet of described cyclone separator is through pipeline and described dehumidifierConnection, the stripping gas outlet of described dehumidifier connects with described piping filter through pipeline, described filter pipelineThe stripping gas outlet of device directly exports the gas that can recycle；Described cyclone separator, dehumidifier and pipeThe separator outlet of road filter connects with described three phase separator；Described centrifugal pump and described three phase separatorConnection.
Described desorption steam isolation of purified unit is arranged on described indirect heating and the oil gas vent of thermal desorption unitPlace, by the spray cooler being sequentially connected with by pipeline, the first coalescing separator, regeneration blower fan, second is gatheredKnot separator, dehumidifier and piping filter composition, it is defeated that described spray cooler connects described thermal desorption cavityThe thermal desorption gas gone out.
Described spray cooler includes tank body, multiple nozzle assembly, coarse separation district, spark arrester, unidirectionalValve, the top of described tank body is sequentially connected with described spark arrester and check valve, and the plurality of nozzle assembly uniformly dividesIt is arranged on the sidewall of described tank body cloth, and stretches into the inside of described tank body, be positioned in described tank interiorPosition above nozzle assembly installation site loads described coarse separation district, the bottom of described tank body be provided with intoQI KOU and outlet, be provided with gas outlet in the junction at described tank body top Yu described spark arrester.
In the present invention, oil-containing solid waste heats thermal desorption processing method indirectly, includes following steps:
1) by feed pretreatment units, liquid greasy filth is made predrainage to process, more solid with aqueous relatively low oil-containingUseless complete foreign material sorting, homogenizing in preprocessing field together and the pre-treatment job such as break up, stand-by in Material Staging Area,The material of Material Staging Area generally controls aqueous to be less than 30%, and oil-containing does not limits, and obtains being suitable for what indirect thermal desorbing processedThe material of relative homogeneous；
2) measured by charging and protected location, pretreated material measured, sieve, Magneto separate andConveying, is delivered to indirectly heat and thermal desorption unit after controlling with quantitative adjusting and constant；
3) by indirectly heat and thermal desorption unit to charging metering and protected location conveying material realize profit withThe separation of solid phase, in this indirect heating and thermal desorption unit, oil-containing solid waste material is by with breaing up mechanismThe horizontal Double helix of non-equidistance advances along axis, is progressively warming up to the thermal desorption temperature set, at anoxia barUnder part, it is sequentially completed intensification, water evaporation, most of oil desorption and the heat of small part gum asphalt crackingDesorption process, it is achieved solid innoxious, controls the desorbing time of staying of material by setting the rotating speed of spiral,The time of staying controls 20～30min, and the material completing thermal desorption is referred to as dregs, and its TPH content controls littleIn the level of 1%, entering dregs post-processing unit from desorbing chamber discharging opening, the vapour phase desorbed passes through desorption steamOutlet enters desorption steam isolation of purified unit；
4) heating and the heating of thermal desorption unit indirectly are entered from the fixed gas of desorption steam isolation of purified cell processingCavity burns, and as supplemental heat source, heating cavity combustion tail gas passes through smoke stack emission air.
Described step 4) in desorption steam isolation of purified unit by negative pressure ventilation equipment by desorption steam from indirectly heatingAnd in the desorbing cavity of thermal desorption unit, draw entrance desorption steam isolation of purified unit, desorption steam isolation of purified listThe water that unit discharges absorbs the heat of desorption steam and temperature raises, carry simultaneously water that desorption steam is condensed out andAfter oil, and a small amount of dirt washed out, entrance circulating water treatment and receipts oil unit process, loop back againTo desorption steam isolation of purified unit as cooling water, before stripping gas enters desorption steam isolation of purified unit,Use petroleum hydrocarbon steam filter plant, the dust in vapour phase is filtered.
Device and method in the present invention is to combine oil-containing solid waste feature, former based on indirect thermal desorbing or thermal desorptionReason so that the dregs TPH content after process is less than 1%, and does not produce the waste water of secondary pollution, waste gas and give upSlag, it is achieved oil-containing solid waste innoxious, has reclaimed the oil of more than 75% in greasy filth simultaneously, and has been used by fixed gasMake auxiliary fuel, it is achieved that resource.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment in the present invention is elaborated.
As it is shown in figure 1, oil-containing solid waste indirectly heats thermal desorption processing means and includes the pre-place of charging in the present inventionReason unit 1, charging metering and protected location 2, indirectly heating and thermal desorption unit 3, desorption steam isolation of purifiedUnit 5, circulating water treatment and receipts oil unit 6, dregs post-processing unit 4, sewage purification unit 7, nitrogenProtected location 8 and automatic control unit 9.
Feed pretreatment units 1 is provided with the charging stockyard that the classification of oil-containing solid waste accepts and deposits, clear in charging stockyardExcept obvious foreign material rubbish such as packaging bags, turner tool is then used to complete the blending homogenizing of all kinds of greasy filth and beatDissipate operation, on the mechanical rotary drum of turner tool, be provided with one group of plate washer, in turner tool traveling process,Soft foreign material may collect on baffle plate, and the rigidity impurity of bulk turns over to be thrown both sides and artificially collect.Pre-through chargingProcessing unit obtains aqueous no more than 30% after completing, the oil-containing solid waste of diameter no more than 40mm is transferred to get the raw materials readyDistrict.
Charging metering and protected location 2, as in figure 2 it is shown, include storage bin hopper 20, outfeed belt 21 and materialTitle 22, reciprocating sieve 23, magnetic separating apparatus 26, charging belt 25 and the basis coupled with automatic control unit 9The equipment such as ground switch board.Outfeed belt 21 and material claim 22 underfaces being located at storage bin hopper 20, at storage bin hopperThe discharging direction of 20 is provided with cloth adjustable plate 24, makes discharging can be evenly distributed on outfeed belt by the thickness specifiedOn 21, the motor of outfeed belt 21 is the motor of variable ratio frequency changer speed governing, and material claims to be provided with weight sensor in 22,It is positioned at below outfeed belt 21, for monitoring the weight of material of unit length on outfeed belt 21, additionally setsThere is the gait of march of speed probe monitoring belt.Reciprocating sieve 23 is provided with the screen cloth of 40mm, by vibration motorDriving, reciprocating sieve 23 is provided with oversize outlet and siftage discharging opening 27, siftage discharging opening 27Surface in charging belt 25 feed end.Charging belt 25 angle of inclination is less than 15 °, motor drive,Charging belt 25 is arranged over 2～4 groups of dismountable ferromagnetism permanent magnets or electric magnet.Local switch board isEquipment distribution in charging metering and protected location 2, and by PLC display running status and parameter, andThe quantitative adjusting of discharging and constant control, and switch board is additionally provided with communication interface and automatic control unit communication, canRealize the long-range control of charging metering and protected location 2.
Heating and thermal desorption unit 3 indirectly, as it is shown on figure 3, be made up of heating cavity 45 and thermal desorption cavity,Wherein the heated portion of thermal desorption cavity is placed among heating cavity 45, the inner space of thermal desorption cavity with addThe inner space of hot cavity 45 is that two independences are separated and mutual disconnected cavity.
Thermal desorption cavity includes cylinder 30 cylindrically, and the two ends of this cylinder 30 are close by sealing device 31Close, be respectively arranged at two ends with charging aperture 32 and discharging opening 33, in the middle part of cylinder 30 at cylinder 30Arch upward oil gas collection chamber 35 toward epirelief, the wall in oil gas collection chamber 35 is provided with oil gas vent 36 (also referred to asStripping gas exports), oil gas collection chamber 35 is arc-shaped structure, with oil gas after the upper shed of oil gas collection chamber 3Collecting chamber 35 is welded to connect, and is provided with multiple energy in the outside wall surface in cylinder 30 and oil gas collection chamber 35 simultaneouslyCylinder 30 is carried out the thermocouple 37 of thermometric.The cylinder 30 major part in addition to discharging opening 33 is placed in heatingCavity 45 is internal, and heating cavity 45 is a steel outer chamber, and being externally provided with 4～6 at steel outer chamber can be remoteThe burner 42 of process control, fixed gas nozzles, in steel outer chamber, it is provided with baffle plate, inwall has been sticked thermal insulationRefractory brick, is provided with chimney 47 on described steel outer chamber simultaneously.Use natural gas or fuel Heating, make to addCylinder 30 is heated after being heated by hot cavity 45 inside indirectly, and the inner surface at cylinder 30 is provided with resistance to fire screenHot material.
Being provided with a spiral propeller in cylinder 30, this spiral propeller includes the used main shaft wearing cylinder 3034, main shaft 34 is provided with the step-by-step movement impeller 38 that helical pitch progressively diminishes along main shaft 34, one end of main shaft 34Extend outside heating cavity 45 and cylinder 30 through obturator 31, after shaft coupling 39, drive mechanism 40 withFrequency conversion motor 41 couples.Main shaft 34 is processed by seamless steel pipe, and material is heat-resisting carbon steel, step-by-step movement impeller38 and cylinder 30 inwall between leave certain interval, it is ensured that will not clamping stagnation between step-by-step movement impeller 38 and cylinder 30.
It is welded with on step-by-step movement impeller 38 and turns over mud plate 43, it is ensured that mud uniformly mixes, stir-fries, also ensure mud simultaneouslySeparate with cylinder 30 inwall；On main shaft 34, it is welded with gravity simultaneously cleans chain 44, it is ensured that mud pushes away with spiralEnter the adhesion of device, as shown in Figure 4 and Figure 5.
Being equipped with gas lock at the charging aperture 32 of thermal desorption cavity and discharging opening 33, gas lock is driven by the motor of adjustable speedDynamic, and it is provided with the interface being connected with nitrogen protected location 8.Gas lock at charging aperture 32 is arranged over feed hopper 46,For accepting the sludge material proposed by charging belt 25 in charging metering and protected location 2, at discharging opening 33Gas lock is connected with dregs post-processing unit 4, and oil gas vent 36 is connected with desorption steam isolation of purified unit 5.
The gas lock of spiral propeller and charging aperture 32, discharging opening 33 all can reversely rotate, to eliminate unexpected blockingWait indefinitely problem with card, automatic control unit 9 control.
Oily sludge material and flame are separated by heating and thermal desorption unit 3 indirectly in the present invention completely, realThe most indirectly heat, utilize gas lock isolation protection, sealing and the additional nitrogen gas shielded of input and output material end simultaneously, anti-In only air enters thermal desorption cavity, eliminate the risk of internal-combustion and blast, it is ensured that indirectly heating andThe safety of thermal desorption unit 3.
Petroleum hydrocarbon steam filter can be connected, it is to avoid dust enters follow-up each unit at oil gas vent 36.
Burner 42 is provided with air, fuel ratio regulation valve, and desorption temperature can be by the PLC of automatic control unit 9Controlling to be set as designated value, running temperature is 400～600 DEG C.Exhaust combustion chamber pipe is provided with adjustable valve, adjustsThe heat distribution of whole transverse section.Combustor is provided with multiple thermocouple and monitors temperature signal continuously, to control burnerFiring rate.
Indirectly heating and thermal desorption unit 3 by oil-containing solid waste by the double spiral shell of level with the non-equidistance breaing up mechanismRevolve and advance along axis, be progressively warming up to the thermal desorption temperature set, under anoxic conditions, be sequentially completed intensification,Water evaporation, most of oil desorption and the thermal desorption process of small part gum asphalt cracking, it is achieved solidInnoxious, control the desorbing time of staying of material by setting the rotating speed of spiral, the time of staying control 20～30min.The axle that flat spin is sealed by band with desorbing cavity is connected, it is to avoid leak into air.Complete thermal desorptionMaterial be referred to as dregs, its TPH content can be controlled in the level less than 1%, enters from desorbing cavity discharging opening 33Entering dregs post-processing unit 4, discharging opening is provided with the gas lock of band nitrogen protection, avoids air to enter as far as possible, solvesThe vapour phase of sucking-off enters desorption steam isolation of purified unit 5 by oil gas vent 36.
Desorption steam isolation of purified unit 5 is arranged on heating and the top of thermal desorption unit 3 indirectly, takes out with negative pressureGas mode extracts desorption gas out in the thermal desorption cavity of heating and thermal desorption unit 3 indirectly.Desorption steam separatesClean unit 5 is a condensing plant, and this condensing plant can use indirect cooling device or spray coldBut equipment two kinds.Wherein:
As shown in Figure 6, indirect cooling device includes the vacuum jet pump 50, centrifugal sequentially connected by pipelinePump 51, three phase separator 52, cyclone separator 53, dehumidifier 54 and piping filter 55, vacuum jet pump50 connect, simultaneously with centrifugal pump 51, three-phase through the oil gas vent 36 of pipeline with indirectly heating and thermal desorption unit 3Separator 52 connects, and the stripping gas outlet of three phase separator 52 connects with cyclone separator 53 through pipeline, eddy flowThe stripping gas outlet of separator 53 connects with dehumidifier 54 through pipeline, and the stripping gas of dehumidifier 54 exports through pipelineConnecting with piping filter 55, the stripping gas outlet of piping filter 55 directly exports the gas that can recycleBody.
The separator outlet of cyclone separator 53, dehumidifier 54 and piping filter 55 is with three phase separator 52 evenLogical；Centrifugal pump 51 connects with three phase separator 52.Vacuum jet pump 50 is suction with the combination of centrifugal pump 51Equipment, is also time condensation equipment, and i.e. under the effect of centrifugal pump 51, in three phase separator 52, extraction is clearWater, additional specific flow velocity and flow after pump 51, enter vacuum jet pump 50, when current quickly flow by centrifugationCross vacuum jet pump 50 internal, drive vacuum, suck by the stripping gas indirectly heated and thermal desorption unit 3 produces,Sufficiently mixing in vacuum jet pump 50, mixed air-water mixture enters three under gravityPhase separator 52.In the gas-water separation district within three phase separator 52, heavy solid ash group in mixturePart and mink cell focus be deposited to bottom under gravity, receive mud groove through taper and collect and discharge, light in mixed zoneMatter oily hydro carbons floats to liquid level top, collects recycling, the volatility in mixture through adjustable weir plateHydrocarbon gas, forms gas-phase space at separator top, and the air vent through top is discharged, and enters back into eddy flow and dividesFrom device 53, dehumidifier 54 and piping filter 55, remove the ash of residual in gas phase component, steam and itsHis impurity, the gas processed is air and volatile hydrocarbon mixture, through pipeline enter circulating water treatment andReceive oil unit 6 or return to indirectly heat and in the heating cavity 45 of thermal desorption unit 3, carry out heating furnace combustion-supporting withRealization makes full use of.
Desorption steam isolation of purified unit 5 can also use spraying cooling equipment, as it is shown in fig. 7, spraying cooling equipmentInclude be sequentially communicated by pipeline spray cooler the 60, first coalescing separator 61, regeneration blower fan 62,Second coalescing separator 63, dehumidifier 54 and piping filter 55.
As shown in Figure 8, spray cooler 60 includes the cylindrical tank body 64 being made up of carbon steel, tank body 64Top seals and is provided with ejector lid 72, and is sealedly connected with spark arrester 67 and unidirectional successively through ejector lid 72Valve 68, equally distributed on the sidewall of tank body 64 is provided with multiple nozzle assembly 65, the one of nozzle assembly 65End stretches into the inside of tank body 64, is internally located at above nozzle assembly 65 installation site at tank body 64 and loads coalescenceDisengagement zone 66, the bottom welding at tank body 64 has cone bucket, and the lowermost end struggled against at cone is provided with outlet 71,And multiple air inlet 69 is set along tank body, at tank body 64 top at tank body 64 for 64 1 weeks near the position of cone bucketThe junction of spark arrester 67 is provided with gas outlet 70.Gas outlet 70 is sequentially connected with the first coalescence by pipeline and dividesFrom device 61, regeneration blower fan the 62, second coalescing separator 63, dehumidifier 54 and piping filter 55.
Under the adsorption of regeneration blower fan 62, the desorption gas that desorbing cavity exports from oil gas vent enters sprayDrench cooler 60, via the vapor-liquid separation of spray cooler 60 so that isolated liquid phase enters recirculated waterProcessing and receive oil unit 6, fixed gas then is connected to indirectly heat and the burning of thermal desorption unit 3 by pipelineOn the fixed gas burning nozzles of room.
Can form the pressure-fired of 20～30KPa while negative pressure ventilation, the fixed gas after processing is sent intoThe burning nozzles of heating cavity 45.
Dregs post-processing unit 4 includes outfeed belt conveyor, humidification apparatus and dust suppression equipment, dregs post processing listThe charging aperture of unit's 4 outfeed belt conveyors is connected, after dregs with the discharging opening 33 of heating and thermal desorption unit 3 indirectlyThe discharging opening of processing unit 4 connects the entrance of dust suppression equipment, and dust suppression equipment discharging opening is arranged on discharging stockyardSide, the humidification water inlet interface on dust suppression equipment is connected by pipeline with humidification apparatus.Dust suppression equipment uses
The spine shape spiral of 300rpm realizes quickly being fully contacted of water smoke and dust, completes in the space of about 1mDust suppression.Humidification apparatus includes water tank and coupled centrifugal pump, and outlet of centrifugal pump is connected with dust suppression equipment.The most adjustable rotating speed of motor of conveyer and dust suppression equipment, usual control unit is adjusted.
Circulating water treatment and receipts oil unit 6 receive the water outlet in desorption steam isolation of purified unit 5, in circulating water treatmentAnd the natural subsidence completing the solid three-phase mixture of profit in receiving oil unit 6 separates, the oil slick on top is by scraping oil pipeIt is discharged to low level and reclaims fuel tank, then be passed to multi-purpose station oil product unit by reclaiming outside oil pump.Solid precipitation is arranged in bottomMud groove, periodically discharges.Water overflows to cyclic water tank, enters air cooler through circulating pump pressurization, and temperature is from 50～60 DEG CBeing reduced to 40～50 DEG C, the sewage after cooling, a part is back to use desorption steam isolation of purified unit 5, excess portionDivide and enter sewage purification unit 7.Circulating water treatment and receipts oil unit 6 are closed cells, 20～40KPaRunning under pressure, inside is provided with liquid level, temperature and pressure sensor, and fan for air cooler is designed as multiple stage series connection,Unlatching quantity and the time of air cooler according to air cooler out temperature, can be automatically controlled.
Sewage purification unit 7 includes preprocessing part and advanced treating part, and the coagulation that preprocessing part passes through floatsOptional equipment goes oil removing, and after oil removing, water part enters the humidification water water of dregs post-processing unit 4 by elevator pumpCase, unnecessary water enters advanced treating part, and advanced treating part uses oxidation and adsorption plant, Jiang ShuichuManage to the water standard of outer draining outer row.
Nitrogen protected location 8 use swing adsorption nitrogen producing apparatus obtain nitrogen, constant voltage supply purity 99.9% nitrogen,Nitrogen storage is connected to indirectly heat and thermal desorption unit 3 by pipeline in nitrogen storage tank, nitrogen storage tank outletCharging aperture 32, discharging opening 33 the position such as gas lock as inert protective gas.
The online various flows of above-mentioned all unit, pressure, temperature, liquid level, rotation are set by automatic control unitStandby rotating speed, motor operating frequency, current of electric and voltage and Self controlling valve state etc. carry out centralized displaying, reportAlert and control, and be provided with automatic control program and complete operation, it is provided with chain control program and ensures that unit runs peaceEntirely, data acquisition storage function it is provided with to consult historical data and to generate form.I.e. real by DCS or PLCThe control of existing whole device, shows the flow process of each unit and control point real-time status and monitoring on computer screenPoint real time data, can realize operate unit on display screen and control and the setting of automatic control program parameterFixed.Unit is provided with warning and safe and continuous controls program and ensures that unit is safely controllable.
In sum, in the present invention, oil-containing solid waste heats thermal desorption processing means indirectly is to pass through feed pretreatmentUnit, obtains being suitable for the material of the relative homogeneous that indirect thermal desorbing processes；Measured by charging and protected locationConstant feed amount, it is ensured that the continuous and steady operation of whole system；By heating and thermal desorption unit indirectly, realExisting profit separates with solid phase, it is achieved solid phase innoxious；By desorption steam isolation of purified unit and recirculated waterProcess and receive oil unit, it is achieved heat balance, the resource of oil reclaim and the utilization of fixed gas；Locate after dregsReason unit realizes the cooling of solid phase and avoids airborne dust；It is free from environmental pollution that sewage purification unit guarantees to remain sewage；Owing to using cleaning fuel and indirectly heated mould formula, chimney tail gas meets atmospheric emission standard.
Solid phase total petroleum hydrocarbons content after the present invention processes can reach less than 0.3%, it is ensured that stable under various operating modesControlling below 1%, dregs mixes adobe in the ratio of 5～25% does not affect the quality of fired brick, it is achieved thoroughEnd harmless treatment and safe disposal；Reclaiming the oil of more than 75% in greasy filth to be recycled, fixed gas is the most straightTake back burning to utilize, it is achieved resource；Residue sewage realizes purified treatment, utilization or properly disposes, and tail gas reachesMark, does not causes secondary pollution to environment, can be widely applied to the industry oily sludge such as oil field, petrochemical industry and oilBase well drilling detritus and the process of organic polluted soil.
It is above the preferred embodiments of the present invention, not the present invention is made any pro forma restriction.Every according to thisThe technology of invention refers to any simple modification, equivalent variations and the modification being done above example, the most still belongs toIn the range of technical solution of the present invention.