A kind of metal plate type wet dust removal defogging equipment
Technical field
The utility model is related to a kind of dedusting demister, more particularly to a kind of metal plate type wet dust removal defogging equipment,
Belong to technical field of environment protection equipment.
Background technology
In recent years, with the continuous development of industry, cause China's atmosphere pollution increasingly serious, the flue gas particularly in air
Pollution, causes haze weather in recent years serious, endangers the healthy of the mankind.How to contain the discharge of flue gas pollutant into
One of matter of utmost importance for current industrial development, in view of environmental protection standard is gradually strict, to major pollutants index ultralow row is implemented
Put standard, it is desirable to the discharge index≤5mg/Nm of dirt.So promote to the application of deduster in industrial production, and then lifted
Further investigation to electric cleaner.
The cleaning principle of electric cleaner is:Using the strong electric field formed between negative electrode and anode, make air molecule electric
From a large amount of electronics of moment generation, negative ions make the particulates such as the dust and droplet by electric field charged, in the effect of electric field force
It is lower to do directed movement to negative electrode, anode, the particulates such as dust and droplet is gathered on negative electrode, anode, to realize to discharge
Flue gas carries out purified treatment.
Coal fired power plant, for the improvement of dirt, is at present that big dust particle is removed before desulphurization system using more method,
Final dusting is carried out by the demister of desulphurization system, dedusting index is up to 15 ~ 30mg/Nm.Reach after to make desulphurization system
The emission request of dust≤5mg/Nm, existing wet dust removal defogging equipment has two kinds, and one kind is outer horizontally disposed in desulfurizing tower
Metal plate type wet scrubber, it is a kind of be outside tower top or tower arrange nonmetallic pipe precipitator.But this two kinds of equipment are equal
There is certain defect.
For horizontally disposed metal plate type wet scrubber, cyclic water tank, discharge casing, water supply tank, plus alkali tank need to be equipped with
(Adjust circulating water PH value)And a series of water system equipment such as various pumps, carry out continuous moisture film to pole plate in operation and rinse anti-
Only pole plate corrosion, because water consumption is big, is not suitable for the serious coal fired power plant of water shortage and uses, and operating cost is higher.Simultaneously this kind sets
Standby to be arranged in outside tower, floor space is larger, is not suitable for lacking the transformation project of the Built hydropower station in place.
For the nonmetallic pipe precipitator arranged outside tower top or tower, because anode tube bank electroconductive frp is adopted more, had
Stronger antiacid corrosive power, it is not necessary to rinsed using continuous moisture film as plate-type dedusting device, it is only necessary to using interrupted, interval spray
Water is rinsed, and water system is simple.It is careless slightly in installation or running but electroconductive frp belongs to inflammable thing, will occur
There are a lot of such accidents in pyrophoricity accident, the country, suffer heavy losses;The electroconductive frp tube bank that in addition anode is adopted simply exists
The inner surface of tube bank has inlayed one layer of conductive fiber felt, and its electric conductivity is passed through again at a high speed far away from metallic anode plate in operation
, there is the possibility of conductive fiber layer peeling in washing away for flue gas.Domestic coal fired power plant minimum discharge project it is newly-built or transformation in adopt
Pipe precipitator operation the time limit it is shorter, above-mentioned latent defect does not also expose, such as defect occur, the maintenance or replacing of equipment
Will be extremely complex.
Utility model content
The purpose of this utility model is to overcome problems of the prior art, there is provided a kind of metal plate type wet type is removed
Dirt defogging equipment, can increase smoke moisture, slow down equipment corrosion, and efficiency of dust collection is high, and operating cost is low.
To solve above technical problem, a kind of metal plate type wet dust removal defogging equipment of the present utility model, including dedusting
Device housing, the lower end of the shell of dust remover is provided with smoke inlet, and the upper end of the shell of dust remover is provided with exhaust opening, the dedusting
The inner chamber middle part of device housing is ionized region, and the ionized region is provided with multigroup anode for extending along flow of flue gas direction and being parallel to each other
Plate, each positive plate is separately fixed on anode superstructure, and many cathode lines, each described the moon are uniformly provided between adjacent anode plate
Polar curve is separately fixed on cathode frame;Spray header is provided with above the ionized region, is uniformly provided with the spray header
Flooding nozzle, is provided with spraying water pipe below the ionized region, on the spraying water pipe atomizer is uniformly provided with.
Relative to prior art, the utility model achieves following beneficial effect:Flue gas enters deduster shell from smoke inlet
Intracoelomic cavity, flue gas flows into from bottom to top ionized region, to load between positive plate and cathode line and form high voltage electric field after high voltage
Catch and know droplet and dust granules, discharge from exhaust opening after the process of dedusting demisting.Only in equipment start-stop or normal certain run
During individual interval, flooding nozzle water spray is rinsed to positive plate and cathode line, and the time is about 2~5min;Normal
During work, each atomizer continuously sprays into water smoke, increase smoke moisture, the little droplet coalescence promoted in flue gas, improve water smoke and
The charging performance of dust simultaneously forms continuous moisture film in polar board surface, it is to avoid dust bonding causes pole plate to corrode.The equipment is adapted to
Coal fired power plant exhaust gas volumn pollutes larger occasion, can effectively remove drop, dust and ultrafine dust to flue gas system afterbody, removes
Dirt is good except fog effect;Avoid that horizontally disposed metal plate type wet scrubber water consumption is big, the shortcoming that circulation is complicated,
The humidity in flue gas is increased due to atomizer, continuous moisture film can be formed in polar board surface so that the anti-corrosion of metal polar plate
Problem is resolved, and causes to be possibly realized using the wet scrubber equipment of metal polar plate in tower top arrangement, while also can
Floor space is reduced, cost of investment is reduced;It is low that this equipment overcomes completely nonmetallic pipe precipitator conductance, installation and operation
In easy produced problem, with extensive market application foreground.
Used as improvement of the present utility model, the spray header is connected with the outlet of spray pump, the spraying water pipe with
The outlet of atomizing pump is connected, and the spray pump is connected respectively with the suction inlet of the atomizing pump with the bottom of flush box.
As further improvement of the utility model, between the smoke inlet and the spraying water pipe flue gas even distribution is provided with
Plate.Flue gas even distribution plate can make flow of the flue gas on equipment cross section more uniform.
Used as further improvement of the utility model, the flue gas even distribution plate is stainless steel plate or glass-fiber reinforced plastic grille.
Used as further improvement of the utility model, the anode superstructure is that bottom fixed structure is suspended on top in midair;Described the moon
The top of pole framework is commonly connected on stainless gooseneck by insulator chamber hanging, the bottom of the cathode frame.
Used as further improvement of the utility model, the inwall of the shell of dust remover posts glass flake anticorrosive coat.
Description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description, accompanying drawing only provides ginseng
Examine and used with explanation, be not used to limit the utility model.
Fig. 1 is the structural representation of the utility model metal plate type wet dust removal defogging equipment.
Fig. 2 is the schematic cross-section of ionized region in the utility model.
Fig. 3 is the arrangement schematic diagram of spray header in the utility model.
Fig. 4 is the arrangement schematic diagram of injection spray pipe in the utility model.
In figure:1. shell of dust remover;1a. smoke inlets;1b. exhaust openings;2. flue gas even distribution plate;3. anode superstructure;3a. anodes
Plate;4. cathode frame;4a. cathode lines;5. insulator chamber;6. high voltage power supply;7. spray header;7a. flooding nozzles;8. spray
Pump;9. spraying water pipe;9a. atomizers;10. atomizing pump;11. flush boxs.
Specific embodiment
As shown in Figures 1 to 4, metal plate type wet dust removal defogging equipment of the present utility model includes shell of dust remover 1, removes
Dirt device housing 1 is using carbon steel sheet and inwall posts glass flake anticorrosive coat.The lower end of shell of dust remover 1 is provided with smoke inlet 1a, removes
The upper end of dirt device housing 1 is provided with exhaust opening 1b, and the inner chamber middle part of shell of dust remover 1 is ionized region, and ionized region is provided with multigroup along cigarette
The positive plate 3a that flow of air direction extends and is parallel to each other, each positive plate 3a are separately fixed on anode superstructure 3, adjacent anode plate
Many cathode lines 4a are uniformly provided between 3a, each cathode line 4a is separately fixed on cathode frame 4;Spray is provided with above ionized region
Spray pipe 7, is uniformly provided with flooding nozzle 7a on spray header 7, spraying water pipe 9 is provided with below ionized region, on spraying water pipe 9
It is even to be provided with atomizer 9a.
Spray header 7 is connected with the outlet of spray pump 8, and spraying water pipe 9 is connected with the outlet of atomizing pump 10, spray pump
8 are connected respectively with the suction inlet of atomizing pump 10 with the bottom of flush box 11.Spray header 7 and spraying water pipe 9 can adopt corrosion resistant
The PP plastic tubes of erosion or stainless steel tube.The selection of flooding nozzle 7a ensures the flushing that shower water has had under operating pressure 0.3MPa
Effect;The selection of atomizer 9a ensures the atomizing effect that spray water has had under operating pressure 0.3MPa, increases desulfurization fume
Humidity, it is ensured that the moisture film of steady and continuous can be formed on pole plate.
Flue gas even distribution plate 2 is provided between smoke inlet 1a and spraying water pipe 9, flue gas even distribution plate 2 is stainless steel plate or glass
Steel grating, ensures airflow uniform distribution coefficient within 0.15 by flow field simulation calculation.Flue gas even distribution plate 2 can make flue gas in equipment
Flow on cross section is more uniform.
Anode superstructure 3 is that top suspends bottom fixed structure, positive plate 3a choosing multiple forms, according to different operating modes in midair
Between 4 ~ 10 meters, material is 316L or 2205 to height.The top of cathode frame 4 by the hanging of insulator chamber 5, under cathode frame 4
Portion is commonly connected on stainless gooseneck, and cathode line 4a is acupuncture line, and material is 316L or 2205.Insulator chamber 5 is by high-tension electricity
Source 6 powers, and makes to form big electric field between deduster cathode and anode, produces a large amount of electronics, ion.
Flue gas enters the inner chamber of shell of dust remover 1 from smoke inlet 1a, and flue gas flows into from bottom to top ionized region, positive plate 3a
Load and cathode line 4a between and form high voltage electric field after high voltage and catch and know droplet and dust granules, after the process of dedusting demisting from
Exhaust opening 1b is discharged.Only at certain interval of equipment start-stop or normal operation, flooding nozzle 7a sprays water to positive plate 3a and the moon
Polar curve 4a is rinsed, and the time is about 2~5min;In normal work, each atomizer 9a continuously sprays into water smoke,
Increase smoke moisture, the little droplet coalescence promoted in flue gas, the charging performance of raising water smoke and dust and formed in polar board surface
Continuous moisture film, it is to avoid dust bonding causes pole plate to corrode.
The foregoing is only the preferable possible embodiments of the utility model, non-therefore limitation patent of the present utility model
Protection domain.In addition to the implementation, the utility model can also have other embodiment.All employing equivalents or equivalent change
The technical scheme to be formed is changed, is all fallen within the protection domain of the utility model requirement.