CN2408971Y

CN2408971Y - Wet electrostatic smoke purifier

Info

Publication number: CN2408971Y
Application number: CN 99220301
Authority: CN
Inventors: 蔺少春
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-03-29
Filing date: 1999-03-29
Publication date: 2000-12-06
Anticipated expiration: 2009-03-29

Abstract

The utility model relates to a wet electrostatic smoke purifier, which is a device used for purifying the smoke of a boiler and other combustion equipment in cleaning method and electrostatic adsorption method. The smoke can enter a sprinkling chamber (7) and a gas and water mixing chamber (8) for preliminary washing, and then water vapor containing acid in the smoke and the smoke having small granules are further removed under the action of a corona electrode (5) and a dust collection pole plate (4). In addition, the upper end of the dust collection pole plate (4) of the utility model is provided with water flow to form a water film, the water film can utilize circulating water, and the upper part of the water flow is provided with replenished water as a conducting electrode. The circulating water can mix with boiler slag in a circulating water channel (11), and the acidity of the circulating water is reduced without the drainage of black liquid.

Description

A kind of wet electrostatic smoke eliminator

The utility model is the device that a kind of boiler of feeding and other combustion apparatus purify flue gas.Be used to remove sulfur in smoke, nitrogen oxide and particle.

Because increasing the weight of day by day of atmosphere pollution, widely used various cleaners can not satisfy the needs of environment protectment protection at present.The purpose of this utility model is to comply with this requirement, for people provide that a kind of efficient is higher, less energy consumption, uncorruptible smoke eliminator.

The utility model is big according to the dry electrostatic cleaner steel quantity consumption that uses at present, and the problem of corroding easily again of wet type imposes above the control of dust pole plate and washes away current, thereby form moisture film on pole plate.Pole plate itself can be made with the nonmetallic materials (as fiberglass etc.) of acid corrosion-resistant.Wash away current above impose additional water source.This water source does not contain acidity, and the pipeline at this water source (3) can connect the pole plate lead-out wire.Flush water of the present utility model can realize recycling.Alkaline matters such as stove quarrel are mixed in circulating water chennel with flush water, reach the purpose that reduces acid-base value.Recycle after filtering slightly.Supplementing water is used for replenishing the moisture that is cut and soaks also to walk because of stove, and whole device does not efflux black liquor.

Technology contents of the present utility model is such:

Smoke eliminator comprises: purify back fume emission mouth (1), shell (2), supplementing water waterpipe (3), flush water waterpipe (4), control of dust pole plate (5), corona discharge electrode (6), spray header (7), gas approach (8), spray chamber (9), air water mixing chamber (10), return pipe (11), circulating water chennel (12), deslagging belt (13), water pump (14) etc.

The bottom of spray chamber (9) in shell (2).In spray chamber, form closeer anxious spray water flow.Air water mixing chamber (10) is arranged in the bottom of spray chamber, some ventilations space is arranged in the bottom of air water mixing chamber, the water of spray is with after cigarette mixes in spray chamber and mixing chamber, flue gas after the washing and part steam upwards enter the electrostatic precipitation chamber, current flow in the pond of shell inner bottom part, return circulating water pool through return pipe (11), the middle and upper part is the electrostatic precipitation chamber in the shell, form by parallel control of dust pole plate (5) and corona discharge electrode (6), under the effect of electrostatic force, make and contain the acid vapour drop, superfine flue dust is adsorbed on the control of dust pole plate (5), the current that dispensing is arranged in the upper end of control of dust pole plate (5), on the control of dust pole plate, form the moisture film that one deck flows, the material that adsorbs is washed in the pond.Because of the corrosiveness of acidic materials such as sulfur in smoke, oxynitrides, the control of dust pole plate can not use ordinary metallic material, can use corrosion resistant nonmetallic materials.Moisture film on the control of dust pole plate contains certain mineral matter, and itself just has good electric conductivity.For preventing the corrosion of contact conductor, the utility model closely is parallel to the flush water water pipe and arranges condensate make-up piping on the top of flush water water pipe (4).Replenish water pipe available metal material and make, supplementing water does not have corrosiveness, both can do to replenish the water source, can make contact conductor again.

In order to solve secondary pollution problem of the present utility model, cyclic water tank (12) is set in the outside of shell, this water tank also can receive the stove quarrel of boiler, generally contains alkaline matters such as calcium oxide, magnesia in the stove quarrel, mixes the back acid-base value with recirculated water and obtains neutralization.

The utility model is described in further detail below in conjunction with Figure of description:

Fig. 1 is a profile of the present utility model, and the outward appearance of pipeline and cyclic water tank part and partial sectional view.

Fig. 2 is that the A-A of Fig. 1 is to cutaway view.

Fig. 3 is the cutaway view of the utility model control of dust pole plate flush water supplementing water and pipeline.

Among Fig. 1, (1) is for purifying the back exhanst gas outlet; (2) be shell; (3) be condensate make-up piping; (4) be the flush water pipeline; (5) be the control of dust pole plate; (6) be corona discharge electrode; (7) be the shower water pipeline; (8) be gas approach; (9) be spray chamber; (10) be the air water mixing chamber; (11) be the recirculated water return pipe; (12) be cyclic water tank; (13) be rake ash quarrel belt; (14) be water circulating pump.

Among Fig. 2, (15) are the airspace of spray chamber both sides; (16) be the overflow tank.

Among Fig. 3, (17) are supplementing water; (18) for replenishing the water pipe water jet; (19) be flush water; (20) be the flush water water jet; (21) be water fender; (22) be the moisture film that flows.

In the utility model shell, the bottom is spray chamber (9) and air water mixing chamber (10) as can be seen from Figure 1.The bottom of air water mixing chamber can contact with the horizontal plane in pond.The lower limb of air water mixing chamber is all ventilation voids, and the top of air water mixing chamber communicates with spray chamber.In spray chamber (9), some spray nozzles are arranged.At the middle part of shell (2) is the Electrostatic Absorption part, in this part some dust collecting electrode pole plates (5) arranged side by side and corona discharge electrode (6) are arranged, for flue dust and the acid mist that washes away at any time on the dust collecting electrode pole plate (5) drips, be flush water water pipe (4), water fender (21), replenish water pipe (3) in control of dust pole plate upper end, the slit of a flowing water is arranged between water fender and the dust collecting electrode pole plate.When flush water and supplementing water outflow, under the effect of water fender, form mobile moisture film on the two sides of control of dust pole plate.Because of all there is the moisture film that flows uniformly on the two sides of control of dust pole plate, and the water of moisture film contains certain mineral matter, so the moisture film of control of dust pole plate just has good electrical conductivity.The body of control of dust pole plate just can use the nonmetallic materials of certain rigidity, makes as the fiberglass sheet material.

Avoid the acid solution corrosion for the contact conductor that makes dust collecting electrode, contact conductor is connected on the condensate make-up piping (3) on the top of washing away water pipe (4).Condensate make-up piping is installed in the high but not contact scour horizontal line of the top low coverage of flush water pipeline in the flush water pipe arrangement.

The thin current of supplementing water continuously flow to and play the effect that connects contact conductor and the effect of additional flush water in the recirculated water, replenish water pipe and adopt the metal material manufacturing.

By among Fig. 3 as can be seen, flush water pipeline of the present utility model (4) has some hole for water sprayings (20) in the side to the control of dust pole plate, the water of this hole for water spraying ejection is the recirculated water of sedimentation and filtration slightly in cyclic water tank (12), because the acidity of recirculated water is bigger, corrosivity to metallic conduit is very big, so flush water pipeline (4) adopts corrosion resistant plastic tube or multiple tube.

The collection pond is arranged at the bottom in shell (2), collects falling into water of flush water and spray chamber and air water mixing chamber, and this water is discharged through spilling water sewage draining exit (16), flows back to circulating water chennel through water return pipeline (11).By seeing among Fig. 1, circulating water pool is provided with rake ash quarrel belt (13), and this belt can regularly be raked off moistening stove quarrel, so this circulating water chennel can be accepted flush water of the present utility model, shower water and boiler stove quarrel.Recirculated water precipitates slightly in circulating water chennel and filters, and is pressed onto with corrosion-resistant water pump and washes away in pipeline (4) and the spray piping (7).Take the flow of the water yield adjustment supplementing water (17) of moisture out of according to rake stove quarrel like this, make two water yields about equally.The utility model does not efflux black liquor substantially when purifying flue gas, can not cause secondary pollution.

During the utility model work, flue gas to be clean enters from air inlet (8), at first tentatively wash at spray chamber, enter then in the air water mixing chamber (10) and further contact with water, when going out in the space of mixing chamber in lower edge, because the effect of moisture film, bubble, air water is further fully contact again, make major diameter particle, solubility pernicious gas in the flue gas, be dissolved in the water as sulfur dioxide, sulfur trioxide, nitrogen oxide etc.And form acid solution with water and suspension flows into circulating water chennel.

Through the flue gas behind the spray mixing, washing, still contain certain acid mist and tiny flue dust enters the Electrostatic Absorption part, the middle droplet of gas and soot dust granule and both mixtures are between corona discharge electrode (6) and control of dust pole plate (5), under the effect of the electrostatic force that high-pressure electrostatic produces, be adsorbed on the control of dust pole plate (5), and wash away in circulation under the washing away of moisture film and flow back to circulating water chennel.

Circulating water chennel is not only accepted washing, flush water, and the stove of accepting boiler emission is cut, because of the stove most material that is cut is alkaline matters such as calcium oxide, magnesia, be cut when in circulating water chennel, mixing when containing acid washings, flush water and stove, played the effect of neutralizing acid basicity.Marquis when rake grate furnace quarrel and flush water are sedimentary has also taken away part moisture.Just need to replenish the water source, replenish water source (17) when adding water, played the effect of contact conductor, do not have corrosiveness because of replenishing water source (17), so this contact conductor can not corrode.

The utility model is to the anticorrosion aspect; the anticorrosion aspect reliable operation of control of dust pole plate electroplax particularly; contact conductor is not perishable; all there is the moisture film that flows uniformly on control of dust pole plate two sides; effect with conduction; so pole plate can be with the cheap nonmetallic materials of comparing with metal material; the utility model at first adopts wet scrubbing to remove pernicious gas and most of particle dust such as most of sulfur dioxide, nitrogen oxide; then under the effect of electrostatic force, remove acid mist and superfine flue dust in the flue gas, can obtain higher clean-up effect.

Slurry of the present utility model can be realized closed recycling.Do not efflux black liquor, the alkalescence of the stove quarrel that neutralized simultaneously, moistening stove quarrel.

Claims

1, a kind ofly forms the wet electrostatic smoke eliminator by shell (2), spray chamber (9), air water mixing chamber (10), dust collecting electrode pole plate (5), corona discharge electrode (6), flush water water pipe (4), supplementing water water pipe (3), recirculated water tank, it is characterized in that the bottom is spray chamber (9), air water mixing chamber (10) in the shell, the middle part is the Electrostatic Absorption part, top is flush water water pipe (4) and supplementing water water pipe (3), and the outside of shell is circulating water chennel (12).

2, wet electrostatic smoke eliminator according to claim 1, it is characterized in that described spray chamber (9) one ends are gas approach, there are some spray apertures inside, there are some openings to communicate below the spray chamber with air water mixing chamber (10), the top of air water mixing chamber communicates with spray chamber, and the bottom links to each other with the pond.

3, wet electrostatic smoke eliminator according to claim 1, the bottom that it is characterized in that air water mixing chamber (10) are concavo-convex alternate space.

4, wet electrostatic smoke eliminator according to claim 1, the top that it is characterized in that dust collecting electrode pole plate (5) are flush water water pipe (4), supplementing water water pipe (3) and water fender (21), and flush water (19) and supplementing water (17) are accepted in water fender top.

5, wet electrostatic smoke eliminator according to claim 1 is characterized in that dust collecting electrode pole plate (5) is necessary with fiberglass sheet material or plastic sheet.

6, wet electrostatic smoke eliminator according to claim 1, it is characterized in that supplementing water water pipe (3), the one side of side direction pole plate has some hole for water sprayings (18), and the material of supplementing water water pipe (3) own is a metal material, and double as is the electrode connecting line of dust collecting electrode pole plate.

7, wet electrostatic smoke eliminator according to claim 1 is characterized in that circulating water chennel (12), is provided with rake grey belt (13).

8, wet electrostatic smoke eliminator according to claim 1, it is characterized in that flush water water pipe (4), water fender (21), flush water water pipe (4) has the material employing of some hole for water sprayings (20), flush water water pipe (4) and water fender (21) as fiberglass or plastics to a side of dust collecting electrode pole plate (5).