CN208449614U - Wet electrical dust precipitator is used in a kind of trapping of particle dust - Google Patents
Wet electrical dust precipitator is used in a kind of trapping of particle dust Download PDFInfo
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- CN208449614U CN208449614U CN201821052605.5U CN201821052605U CN208449614U CN 208449614 U CN208449614 U CN 208449614U CN 201821052605 U CN201821052605 U CN 201821052605U CN 208449614 U CN208449614 U CN 208449614U
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Abstract
The utility model relates to a kind of particle dust trapping wet electrical dust precipitators, belong to filed of flue gas purification.Polyacrylamide and water and wiring solution-forming is added in the device in storage tank (1), pond (5) are sent into through metering pump (3), check valve (4), spray system is sent to through water pump (6), check valve (7), in electric precipitator, it is sprayed all the way through regulating valve (13) by the nozzle (12) being mounted in inlet box (14), another way is sprayed through regulating valve (16) by being mounted on the nozzle (17) above electric discharge dust collector pole (15).By the way that the coalescence agent of polyacrylamide chemistry is added in spray liquid, promotes particle dust to generate chemical coalescence effect in wet electrical dust precipitator, improve the arresting efficiency to particle dust.The present apparatus can effectively collect the fine dust in flue gas, realize the minimum discharge of coal-burning power plant.
Description
Technical field
The utility model relates to a kind of wet electrical dust precipitators of particle dust in efficiently trapping coal-burning power plant's flue dust.It is described
Wet electrical dust precipitator be mounted on after coal fired power plant flue gas desulfurization system, pass through in flushing liquor be added polyacrylamide chemistry
Coalescence agent, promotes particle dust to generate chemical coalescence effect in wet electrical dust precipitator, and the geometric average for improving dust is straight
Diameter, to improve the arresting efficiency of wet electrical dust precipitator in the electric field to particle dust.Due to generating chemical coalescence agent
The nozzle of flushing liquor is into being arranged in gas tank, and therefore, the chemical coalescence of dust is completed before its is charged, this is just mentioned significantly
The high charging performance of dust, also improves it and effectively becomes into speed.The device can effectively collect flue gas after desulfurization
The fine dusts such as the gypsum of generation solve the difficulties such as the blue smoke generated after coal fired power plant flue gas desulfurization by particle dust discharge
Topic is carried under one's arms so will not generate aqueous vapor in flue gas, is reached simultaneously because wet electrical dust precipitator goes out gas tank equipped with shutter dehydration device
The requirement that coal-burning power plant realizes minimum discharge is arrived.
Background technique
Contain a large amount of fine dust in the flue gas of coal-burning power plant's discharge, is to cause the master that particle dust pollutes in air
Pollution sources are wanted, have serious harm to human health.Although total efficiency of dust collection of existing electric precipitator can achieve 99.8%
More than, but still thering is part fine dust to be discharged from chimney, concentration is about 10~20mg/m3, it is the master for causing haze
Want one of pollution sources.These are largely thin of kinetic diameter < 1 μm by the dust that electric precipitator is not collected but and is discharged
Grain dust.It is to reduce thin due to that can generate ion wind in corona discharge process through the main reason for electric precipitator
The migration velocity of grain dust, and keep it reciprocating between discharge electrode and dust collector pole, it is difficult to be collected, is not collected finally
And direct emission comes out.By take physically or chemically means by particle dust be agglomerated into the biggish dust of partial size be improve it is thin
A kind of effective means of the arresting efficiency of granule dust, currently, the technology that particle dust can be made to generate coalescence effect mainly has
Coagulation simultaneously, sound coalescence, magnetic coalescence, light coalescence, heat setting simultaneously, chemical coalescence etc..Wherein, although coagulation is simultaneously easy in practical applications
Operation, processing exhaust gas volumn is big, and the dust size range handled is wider, but needs individually to increase accessory power supply, and equipment is multiple
It is miscellaneous, invest huge, energy consumption height.Other several coagulating techniques do not obtain engineer application because of the reason of performance difficulty, effect difference.Change
Learning coalescence not only can be improved the removal efficiency of particle dust, additionally it is possible to while multiple pollutant is removed, and remove to existing
The operation of dirt device will not generate large effect, therefore, can use water mist coalescence in wet electrical dust precipitator and chemistry is solidifying
And method to particle dust carry out coalescence thickening, to improve electric precipitator to the collection efficiency of particle dust.
Authorization Notice No. is that CN1242830C discloses a kind of ultra-fine grain dust reunion promotion method, due in flue
Reunion liquid is sprayed into, so needing to be separately provided mixing chamber, agglomerating effect is poor, while the double-current atomizing nozzle structure used is complicated,
It is easy blocking, is only applicable to dry electric precipitation.CN103768886A discloses more collaboration particle dust coalescence methods, uses
Coagulation is simultaneously combined with chemical coalescence, is needed provided with complicated electrode structure, chemical coalescence agent is atomized by water vapour, can not only
Consumption is high, and increases the humidity of flue gas, causes deashing difficult.The wet type electricity that CN206483575U can remove particle dust removes
Dirt device, this method removes part particle dust only with the recirculated water washing of wet electrical dust precipitator, for of sub-micron
Grain removal effect is bad.Simultaneously because wet electrical dust precipitator is located at the top of desulfurizing tower, equipment anticorrosion is difficult.CN101513583B
A kind of fine grained chemistry coalescence promotor is disclosed, since the reunion formula of liquid is complicated, is instantaneously become in coal-fired dust characteristic states
Change in biggish situation, flushing dose is difficult to control, and affects chemical coalescence effect.As can be seen that in existing electric dust removing system
The dust coalescence device used has the disadvantage that structure is complicated, and cost is higher, adjusting is difficult, if chemical coalescence agent directly added
Enter into the rinse-system of wet electrical dust precipitator, greatly simplify coalescence apparatus structure, at the same can reduce the manufacture of equipment at
This.
Summary of the invention
The purpose of this utility model is to provide a kind of particle dust trapping wet electrical dust precipitators, can using the device
Effectively to trap particle dust in coal-burning power plant's flue dust, electric precipitator outlet dust concentration is made to be less than 5mg/m3, to meet combustion
The requirement of coal-fired plant's minimum discharge.The advantages of device has structure simple, easy to adjust, good reliability.The device is sufficiently sharp
The rinse-system being equipped with wet electrical dust precipitator itself, therefore occupied area is small, can meet coal-burning power plant's dust pelletizing system and propose effect
The requirement of transformation.
The utility model is realized by following scheme:
The polyacrylamide chemistry coalescence agent of specified rate is added in mixing drum, it is 20% that water, which is added, and is made into mass concentration
Solution, solution is transported in wet electrical dust precipitator circulating water pool by metering pump, by control pond addition water, make
Its mass concentration is diluted to 0.05%~0.1%.In the rinse-system of wet electrical dust precipitator, agglomerator passes through centrifugal pump, tune
It saves valve and flowmeter is sent into electric precipitator and completes coalescence effect.The ratio for rinsing the flow of flow quantity and flue gas is 0.6~
1.5L/m3.In order to make particle dust complete coalescence before electric-field charge, electric precipitator second layer airflow-distribution board it
It is equipped with row's nozzle afterwards, in order to guarantee that flushing liquor and dust completely attach to, rinsing coverage rate is 2~3.In Electric Field in ESP
The flushing liquor of top can play the role of water fog charge and pole plate cleaning, and flow and flushing cycle are adjustable.Through wet type electricity
The dust of deduster trapping is rinsed the ash bucket that deduster is flowed into after water rinses, and is located at the blowdown valve below ash bucket and is discharged into sewage
Processing system.
Additive amount by polyacrylamide chemistry coalescence agent in control flushing liquor and the ratio between exhaust gas volumn, choosing
With centrifugal atomizing nozzle, make 150~300 μm of spray particle diameter, the particle dust in flue gas can be made to complete reunion coalescence, from
And efficiency of dust collection is improved, so that electric precipitator outlet dust concentration is less than 5mg/m3。
The utility model is compared with existing technology, with manufacturing cost is low, structure is simple and convenient to operate, to deduster
The advantages of implementation easy to transform.It can satisfy the requirement that coal-burning power plant realizes minimum discharge, while the polyacrylamide amination added
It learns coalescence agent to enter in sewage disposal system, not will increase cost of sewage disposal.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is the wet electrical dust precipitator schematic diagram with chemical coalescence agent add-on system.
Specific embodiment
As shown in Figure 1, particle dust trapping uses wet electrical dust precipitator, including medicine system, rinse-system, electricity to gather dust and be
System.Wherein storage tank (1), agitating device (2), metering pump (3) form medicine system；Pond (5), water pump (6), flowmeter (8), pressure
Power transmitter (9), regulating valve (13), regulating valve (16), nozzle (12), nozzle (17) form rinse-system；Inlet box (14), shell
Body (18), electric discharge dust collector pole (15) go out gas tank (19) and the electric dust collecting system of ash bucket (21) composition.Agitating device (2) is in storage tank (1)
Top, the kind of drive be coaxial transmission.The arrangement of nozzles of rinse-system is in inlet box (14) and shell (18), pond
(5) volume is greater than 2h flushing fluid.Shell (18) is square structure, help to obtain biggish applied electric field section.Air inlet
Case (14) goes out gas tank (19) and ash bucket (21) for prismatic table shape, ensure that the Uniform Flow of air-flow.Gas is disposed in inlet box (14)
Flow point fabric swatch (10) and airflow-distribution board (11) are equipped with shutter dehydration device (20) in gas tank (19) out, blowdown valve (22) peace
Mounted in the bottom of ash bucket (21).
It is proportionally added into chemical coalescence agent polyacrylamide and water in storage tank (1), is matched under the stirring of agitating device (2)
The solution for being 20% at mass concentration.Pond (5) are sent into through metering pump (3), regulating valve (4), mass concentration is made into pond
For 0.05%~0.1% solution.Solution containing polyacrylamide is through water pump (6), check valve (7) flowmeter (8) and pressure
Transmitter (9) is sent to nozzle.Flushing liquor is divided into two branches in electric precipitator, all the way through regulating valve (13) by be mounted on into
Nozzle (12) in gas tank (14) sprays, and another way is through regulating valve (16) by the nozzle that is mounted on above electric discharge dust collector pole (15)
(17) it sprays.Regulating valve (13), regulating valve (16) use motor driven pattern, due to flowmeter (8) and pressure transmitter (9) energy
The flushing flow rate and pressure of rapid detection system can be used for controlling to adjust the opening size of valve (13), regulating valve (16), make
The ratio for rinsing the flow of flow quantity and flue gas is 0.6~1.5L/m3, flushing pressure is 0.3~0.5MPa.In inlet box (14)
Interior, after airflow-distribution board (10) and airflow-distribution board (11), Flow Field Distribution becomes uniformly flue gas, sprays at this time from nozzle (12)
Solution out can more efficiently make fine grained that chemical coalescence occur.In order to guarantee that flushing liquor and dust completely attach to, air inlet
Flushing liquor coverage rate is 2~3 in case.In order to avoid forming adherency, nozzle (12) and air flow method on flushing liquor airflow-distribution board
The distance of plate (11) is 500mm.Nozzle (17) is arranged in the top of electric discharge dust collector pole (15), and nozzle (12) and nozzle (17) use
Centrifugal atomizing nozzle, spray particle diameter are 150~300 μm.The shutter dehydration device (20) in gas tank (19) can be to avoid removing out
Gas-liquid after dirt carries under one's arms phenomenon, and dehydration device is mounted on out the middle part of gas tank (19), and air-flow wind speed is 3~5m/s.Through chemistry
Flushing liquor after coalescence and dedusting is sent to sewage disposal system by blowdown valve (22) after ash bucket (21) are collected.
Claims (4)
1. a kind of particle dust trapping wet electrical dust precipitator, including storage tank (1), agitating device (2), metering pump (3) form
Medicine system, pond (5), water pump (6), flowmeter (8), pressure transmitter (9), regulating valve (13), regulating valve (16), nozzle
(12), nozzle (17) composition rinse-system and inlet box (14), shell (18), electric discharge dust collector pole (15), go out gas tank (19) and
The electric dust collecting system of ash bucket (21) composition, which is characterized in that for agitating device (2) in the top of storage tank (1), the kind of drive is same
Axis transmission, for arrangement of nozzles in inlet box (14) and shell (18), shell (18) is square structure, and inlet box (14) goes out gas tank
(19) and ash bucket (21) is prismatic table shape, is disposed with two layers of airflow-distribution board in inlet box (14), is equipped with blinds in gas tank (19) out
Window dehydration device (20), blowdown valve (22) are mounted on the bottom of ash bucket (21), and polyacrylamide and water are added in storage tank (1),
The wiring solution-forming under the stirring of agitating device (2) is sent into pond (5) through metering pump (3), check valve (4), through water pump (6), unidirectionally
Valve (7) flowmeter (8) and pressure transmitter (9) are sent to rinse-system, and spray liquid is divided into two branches in electric precipitator, and one
Road is sprayed through regulating valve (13) by the nozzle (12) being mounted in inlet box (14), and another way is put through regulating valve (16) by being mounted on
Nozzle (17) above electric dust collector pole (15) sprays.
2. particle dust trapping wet electrical dust precipitator according to claim 1, which is characterized in that the pond (5)
Interior polypropylene amine concentration of polymer solution is 0.05%~0.1%.
3. particle dust trapping wet electrical dust precipitator according to claim 1, which is characterized in that the electric precipitator
The ratio of the flow of interior spray flow quantity and flue gas is 0.6~1.5L/m3。
4. particle dust trapping wet electrical dust precipitator according to claim 1, which is characterized in that the nozzle (12)
Centrifugal atomizing nozzle is used with nozzle (17), spray particle diameter is 150~300 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821052605.5U CN208449614U (en) | 2018-07-04 | 2018-07-04 | Wet electrical dust precipitator is used in a kind of trapping of particle dust |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821052605.5U CN208449614U (en) | 2018-07-04 | 2018-07-04 | Wet electrical dust precipitator is used in a kind of trapping of particle dust |
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| CN208449614U true CN208449614U (en) | 2019-02-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111266192A (en) * | 2020-03-24 | 2020-06-12 | 江苏联峰工业装备科技有限公司 | Micro-electric field electric coagulation short-flow bag type dust collector |
-
2018
- 2018-07-04 CN CN201821052605.5U patent/CN208449614U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111266192A (en) * | 2020-03-24 | 2020-06-12 | 江苏联峰工业装备科技有限公司 | Micro-electric field electric coagulation short-flow bag type dust collector |
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