A kind of high-pressure fine water mist desulfurized dust collector with front-located dry precipitatorOne, technical field
The utility model relates to desulfurating dust-removing equipment, particularly a kind of high-pressure fine water mist desulfurized dust collector with front-located dry precipitator.
Two, background technology
China's atmosphere polluting problem is more serious at present, has caused the great attention of Party and government, and national in recent years the appearance in succession with the atmosphere method is 20 multi-section laws and regulations of core, and dynamics is big unprecedented.Show according to China Environmental State Bulletin: " air environmental pollution of China is still based on coal smoke type, and major pollutants are sulfur dioxide (SO2) and flue dust, coal-burning boiler such as thermal power plant, iron and steel, metallurgy etc. reduce discharging sulfur dioxide (SO at present2) main path have: coal washing, lime stone (lime) gypsum wet, sea water desulfuration method, a flue gas recirculation sulfuration bed doctor treatment, electronic beam method desulfurization etc. surplus in the of totally ten the desulfurizer of kind of technology in commercialized running or carried out industrial demonstration.The method of the dedusting of coal-burning boiler such as thermal power plant, iron and steel, metallurgy etc. has electric precipitation and bag-type dust at present.Lower and the operating cost of the flue gas desulfur device desulfuration efficiency of middle and small burn coal boiler also compares higher, energy-conservation, the development trend that reduces discharging that have been not suitable for that country proposes; If coal-burning boiler does not reach national specified discharge standard and will be ordered within a certain time explosion in view of national policy, narrow and smallly use traditional method upgrading difficulty very big again and the enterprise that is using middle-size and small-size desulfation dust-extraction device is often local, and output investment ratio is bigger, maintenance cost is also than higher, so improvement is imperative.
Three, utility model content
At above-mentioned situation, for overcoming the defective of prior art, the purpose of the utility model just provides a kind of high-pressure fine water mist desulfurized dust collector with front-located dry precipitator, it is big effectively to solve the transformation difficulty, investment is big, the problem that maintenance cost is high, the utility model is realized by the following technical solutions: include dry collector, absorption tower and high-pressure pump, on the flue of gas approach air-introduced machine is housed, and be connected with first absorption tower through dry collector, first absorption tower is communicated with second absorption tower through flue, on the pipeline of the second absorption tower port of export demister is housed, demister is connected with chimney, first absorption tower links to each other with sedimentation basin through pipeline, and it is continuous with the high-pressure pump port of export on the shower, second absorption tower links to each other with sedimentation basin through pipeline, and it is continuous with shower, the dynamic filter rear end links to each other with the entrance point of high-pressure pump, the dynamic filter front end is equipped with the centrifugal pump that is communicated with the alkali circulating water chennel, sedimentation basin is communicated with the alkali circulating water chennel through filter pocket, and the short transverse along tower in first absorption tower and second absorption tower is equipped with the multilayer fine mist spray head that is connected with shower successively.
The utility model is simple in structure, and floor space is little, and output investment ratio is lower, and energy-saving and environmental protection are the innovations greatly on the existing dust-removal and desulfurizing equipment, and good economic and social benefit is arranged.
Four, description of drawings
Fig. 1 is a structural front view of the present utility model.
Fig. 2 is an absorption tower of the present utility model section of structure.
Five, the specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is elaborated.
By Fig. 1, Fig. 2 provides, the utility model includes dry collector, absorption tower and high-pressure pump, on the flue 7 of gas approach air-introduced machine 5 is housed, and be connected with first absorption towers 1 through dry collector 3, first absorption tower 1 is communicated with second absorption tower 2 through flue, demister 4 is housed on the pipeline of the second absorption tower port of export, demister is connected with chimney 6, first absorption tower links to each other with sedimentation basin 11 through pipeline 15, and it is continuous with 8 ports of export of the high-pressure pump on the shower, second absorption tower 2 links to each other with sedimentation basin 11 through pipeline 16, and it is continuous with shower 18, dynamic filter 9 rear ends link to each other with the entrance point of high-pressure pump 8, the dynamic filter front end is equipped with the centrifugal pump 10 that is communicated with alkali circulating water chennel 13, sedimentation basin 11 is communicated with alkali circulating water chennel 13 through filter pocket 12, and the multilayer fine mist spray head 17 that is connected with shower is equipped with successively with second absorption tower, 2 interior short transverses along tower in first absorption tower 1.
In order to guarantee result of use, said high-pressure pump outlet conduit links to each other with second absorption tower 2 through threeway; Alkali circulating water chennel inlet is equipped with joins alkali groove 14; Said demister is a vertical dismountable, but the periodic flushing demister guarantees that because of issuable dead angle knot ash in the long-time running demister efficiently turns round; Novel JNS corrosionproof steel against sulfuric acid at dew point can be adopted in said first absorption tower, second absorption tower, its tower body, and inwall is coated glass resin flake coating or other corrosion resistance material layer to improve the corrosion resistance of equipment, increases the service life.
Working condition of the present utility model is, flue gas is introduced into dry collector 3 through primary dust removing by air-introduced machine 5 through flue 7, flue gas through pre-dedusting enters first absorption tower 1 and second absorption tower 2 by flue, all be furnished with multilayer fine mist spray head 17 in two absorption towers, short transverse along tower is placed successively, the water that adds desulfurizing agent (NaOH) is sent into shower nozzle 17 and is formed superfine water smoke ejection through pipeline by high-pressure pump 8, flue gas runs into the heavy pressure fine spray of downward high speed ejection in the uphill process in the absorption tower, gas, Gu, the liquid three-phase fully contacts, also have a spot of small grain size dust fully to contact with thin water smoke, constantly cohesion becomes bulky grain, under the effect of gravity, land, and be discharged in the sedimentation basin 11 SO2The heavy pressure fine spray seizure, reacting generating salt and the sulphite that are contained alkaline matter, flue gas cool-down, frequent impact, it is big that droplet merges change, and sedimentation also is discharged in the sedimentation basin 11, adds white lime [Ca (OH) in sedimentation basin2], the formation mass concentration is 1.8 ‰ solution, white lime [Ca (OH)2] generate NaOH with the reaction of sulfate and sulphite after, through filter pocket 12 filtrations, Separation of Solid and Liquid, supernatant flows in the alkali circulating water chennel 13, in circulating water chennel 13, add the NaOH or the NaOH aqueous solution (the NaOH aqueous solution is dissolved in water by NaOH and forms) by joining alkali groove 14, in alkali circulating water chennel 13, inject water purification simultaneously, stir, the formation mass concentration is 2 ‰ NaOH solution, be pumped in the heavy pressure fine spray system by centrifugal pump 10 and recycle, form Closed Recirculation for Ash Water, prevent secondary pollution, and reduce alkali consumption and operation cost
Flue gas after the once desulfurization dedusting enters second absorption tower 2 through pipeline by first absorption tower 1, also has micro-small grain size dust to be removed by two to three layers of thin water smoke of two towers, also also has a spot of SO2Be absorbed through two to three layers of thin water smoke, reaction, generate sulfate and sulphite etc. and be removed with dustshot, flue gas is after demister 4 is removed contained supersaturation moisture, the flue gas that reaches discharge standard or discharging standards delivered in the chimney 6 entered atmosphere.
Technical characterstic of the present utility model is:
1) desulfurization dust-removing efficiency height, SR is little;
2) required desulfurizing tower volume is little, and investment cost is relatively low;
3) the consumption liquid measure is little, gas liquid ratio is low, and alkali consumption also lacks than additive method;
4) the coal-fired rate range of Shi Yonging is big;
5) system is reliable, and operating cost is low;
Learn by above-mentioned situation, the utlity model has smoke elimination efficiently, dedusting, desulfurizing function and corrosion-resistant, wear-resistant, characteristics such as life cycle is long, be fit to use all over the world, also can add other expands apparatus function as denitrfying agent, defluorinating agent etc., to adapt to more and more higher from now on environmental requirement, integrate desulfurization, dedusting function, cost reduces with traditional comparing greatly, and can realize long-term efficient running, meet energy-conservation, reduction of discharging requirement that country proposes, thereby produce good economic benefit and social benefit.