CN101249471B

CN101249471B - Wet-type desulfurizing and dust removing integrated machine

Info

Publication number: CN101249471B
Application number: CN200710185304XA
Authority: CN
Inventors: 白明华; 李秋荣; 郑海武
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2007-11-23
Filing date: 2007-11-23
Publication date: 2010-10-27
Anticipated expiration: 2027-11-23
Also published as: CN101249471A

Abstract

The invention relates to an electrostatic dust removing device, especially an electrostatic dust collector with integral desulfurizing and dedusting function. A main body (3), a drive roll (7) and a motor (8) are fixed on a chassis (1). An air inlet (2) and an air outlet (9) are respectively connected to front end and rear end of the main body (3). A seal cover (5) is disposed on the upper end of the main body (3), and a drainage facility and an ammonium sulfate collecting device are disposed on the lower end of the main body (3). A dedusting discharge electrode (4) connected to a high voltage direct current power supply, a desulfurizing discharge electrode (13) connected to a high-voltage pulse power supply, and a driven roll (11) capable of performing up and down movement are mounted in the main body (3) interior from top to bottom. The drive roll (7) fixed on the chassis (1) is mounted on upper end of the main body (3), and located in the seal cover (5). A stainless steel wire net (6) as anode is mounted on the drive roll (7) and the driven roll (11). One end of the drive roll (7) is connected to the motor fixed on the chassis. By adopting the scheme, a wet type desulfurizing and dedusting integral device can be realized to reduce the area coverage and save investment of fume treatment.

Description

Wet-type desulfurize and dust removing integrated machine

Technical field

The present invention relates to a kind of electrostatic dust collection equipment, especially a kind of with sulphur removal, dedusting electrostatic precipitator as one.

Technical background

Desulfurization and dedusting are the necessary means that all factory smoke dischargings must be carried out processing up to standard before, but, present domestic power plant only carries out wet method or dry desulfurization to handle, lack necessary dust removal process, and only carry out dust removal process in Metallurgical Factory, do not do necessary desulfurization and handle, cause SO in the flue dust of domestic Metallurgical Factory discharging ₂Exceed standard.Even desulfurization and dust removal process have been done to flue gas simultaneously by some power plant and Metallurgical Factory, but what generally all adopts is that two processes of desulfurization and dedusting are separately carried out, and uses desulfurization and dedusting two complete equipments, and it is huge therefore equipment volume just to occur, takes up an area of extensively, invests problems such as big.

At present, deduster mainly divides two big classes, and a class is a mechanical dust collector, and mechanical dust collector comprises gravitational precipitator, sack cleaner, cyclone dust collectors etc. again.Another kind of is electric cleaner.Electrostatic precipitator is with its applied range, and the smoke treatment amount is big, the efficiency of dust collection height, and advantage such as it is low to consume energy, and equipment resistance is little obtains vast application in Metallurgical Factory and power-plant flue gas are handled.The course of work of electric cleaner is, the dust laden air of uniform temperature enters the deduster electric field, and at first dust is charged in electric field, and the charged grit after charged is under the electric field force effect, directed moving taken place, charged dust moves to dust collector pole, and charged dust sticks on the dust collecting pole plate after arriving dust collecting pole plate, last process is a deashing process, this process will stick on the dust collecting pole plate dust and clear up, and dry collector is generally by rapping mode deashing, wet scrubber water flushing deashing.

The electrostatic precipitator pole plate is the critical component of deduster, the performance of pole plate will directly influence the dust removing effects of electric cleaner, the dust collecting pole plate of conventional electric cleaner generally makes plate with corrosion resistant plate or special-shaped plates such as C type, S type, Z type, any form no matter, ubiquity the little shortcoming of specific area, and specific area is little, and specific collection area is little, dust-collecting efficiency is just low, and therefore the dust-collecting efficiency of the dust collecting pole plate of traditional deduster is generally not high.

Typical desulfur technology has the calcium method, and two alkaline process, in-furnace calcium spraying add afterbody humidification activation method, flue gas desulfurization with seawater method, high-temperature catalytic method, electron beam flue gas desulfurization technique (EBA method), circulating fluidized bed boiler desulfurization and ammonia process etc.The sox discharge method is to utilize the high energy electron of electrion plasma generation, and O-H and O-O key are opened, and makes it to become free radical and activation particle, and NH is being arranged ₃When existing, with SO Deng additive ₂Reaction generates ammonium sulfate, is collected by cloth envelop collector or electrostatic precipitator then and uses as chemical fertilizer.This technical costs is lower, non-secondary pollution, desulphurization denitration simultaneously, the recyclable utilization of the accessory substance of formation.

Summary of the invention

Huge in order to overcome the said equipment, floor space is wide, invests shortcomings such as big, the invention provides a kind of can be in a set of equipment the Wet-type desulfurize and dust removing integrated machine of desulfurization and dedusting simultaneously, reduced floor space, save the investment that flue gas is handled.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of Wet-type desulfurize and dust removing integrated machine, be fixed with body on the frame, drive roll and motor, the front end of body is connected with air inlet, the rear end is connected with air outlet, the upper end is equipped with the seal closure that is fixed on the frame and is positioned at the drive roll of seal closure, drainage arrangement and ammonium sulfate gathering-device are installed in the lower end, the interior lower end of body is equipped with driven voller moving up and down, and dedusting discharge electrode that links to each other with high-voltage DC power supply and the desulfurization discharge electrode that links to each other with high-voltage pulse power source are installed between drive roll and driven voller; Stainless steel cloth is installed as anode on drive roll and the driven voller, an end of drive roll links to each other with the motor on being fixed on frame.

Adopt this kind scheme, the electric field in front is the main desulfurization that has concurrently with the dedusting, and the electric field of back is the main dedusting that has concurrently with the desulfurization, two equipment are merged into an equipment, can improve desulfurization dust-removing efficiency, reduce floor space, improve utilization rate of equipment and installations, reduce equipment investment, reduce the flue gas processing cost.

As a kind of improvement of the present invention, described drainage arrangement is sparge pipe, rhone and drainpipe, wherein, sparge pipe is fixed on the bottom that is positioned at discharge electrode on the body, 15～20 nozzles are installed on it, the rhone upper end is connected with the body lower end, and the lower end is connected with drainpipe, and valve is installed on the drainpipe.Described ammonium sulfate gathering-device comprises the ammonium sulfate collection container, and the collection container lower end is connected with carrier pipe, and valve is installed on the carrier pipe.Adopt this kind scheme, by adopting different gathering-devices, can with sewage and ammonium sulfate be collected respectively and crystallization utilizes again.

As another kind of improvement the of the present invention, described stainless steel cloth anode can be set to 4～10 layers.Adopt this kind scheme,, can increase effective specific collection area, improve efficiency of dust collection in the dedusting stage.In desulfurization stage, can improve the collection efficiency of ammonium sulfate.

As a kind of improvement of the present invention, there is annular knurl on described live-roller surface.Adopt this kind scheme, can increase frictional force, prevent that live-roller and silk screen from skidding.

Description of drawings

Be in conjunction with the accompanying drawings and embodiments specific embodiments of the present invention to be described in detail below.

Fig. 1 is the Wet-type desulfurize and dust removing integrated machine front view.

The specific embodiment

As shown in Figure 1, Wet-type desulfurize and dust removing integrated machine involved in the present invention, be fixed with body 3 on the frame 1, drive roll 7 and motor 8, the front end of body 3 is connected with air inlet 2, the rear end is connected with air outlet 9, the upper end is equipped with seal closure 5 that is fixed on the frame 1 and the drive roll 7 that is positioned at seal closure 5, drainage arrangement and ammonium sulfate gathering-device are installed in the lower end, the interior lower end of body 3 is equipped with driven voller 11 moving up and down, and dedusting discharge electrode 4 that links to each other with high-voltage DC power supply and the desulfurization discharge electrode 13 that links to each other with high-voltage pulse power source are installed between drive roll 7 and driven voller 11; Stainless steel cloth 6 is installed as anode on drive roll 7 and the driven voller 11, an end of drive roll 7 links to each other with motor 8 on being fixed on frame 1, and motor 8 is installed on the frame 1.

Contain dust and SO ₂Pending flue gas enter into body 3 by air inlet 2, the airflow uniform distribution plate is installed on the air inlet 2 and body 3 links together, the effect of airflow uniform distribution plate is to make dusty gas enter in the body 3 continuously equably, body 3 is fixed on the support 1, and support 1 supports the weight of armamentarium.Gas at first enters into the dedusting electric field between dedusting discharge electrode 4 and the anode stainless steel cloth 6 in body 3, dusty gas is charged under the dedusting electric field action, and directed moving on anode stainless steel cloth 6, realized dust removal process.

Dedusting discharge electrode 4 has erecting by overhang, it is installed between the positive plate of a rotation, erecting by overhang can be fixed from the side of body 3, and is communicated with high voltage source, and anode stainless steel cloth 6 is set to 4～10 layers, as dust collecting pole plate, during deduster work, dust not only can also see through the silk screen space attached on outermost one deck silk screen, enter on inner which floor silk screen, increased effective specific collection area.Stainless steel steel wire 6 is supported by drive roll 7 and driven voller 11, and rotates under the drive of drive roll 7, and the velocity of rotation of stainless steel steel wire 6 is controlled by the rotating speed of regulating motor 8.In addition, anode stainless steel cloth 6 of the present invention also can the uprush direction be provided with.The roller of drive roll 7 and driven voller 11 vertically design itself has annular knurl, can increase frictional force, prevents that drive roll 7 and driven voller 11 from skidding with silk screen 6, and the bearing at body of roll two ends is provided with dustproof and waterproof seal, prevents that bearing is corroded.Driven voller 11 is connected with frame 1, adjusting device moving up and down is housed on the driven voller 11, adjust the tensioning degree of Stainless Steel steel wire 6 by the position of adjusting driven voller 11, guarantee that per two stainless steel steel wires 6 are stretching and parallel, be unlikely to occur phenomenons such as warpage, distance between two-plate and the discharge electrode is equated, avoid occurring punch-through.Motor 8 is electrodeless adjustable speed motors, regulates the speed for 6 rotations of stainless steel steel wire provide power, electrodeless adjustable speed motor speed to start from scratch according to need of work.

Enter into desulfurization electric field between desulfurization discharge electrode 13 and the anode stainless steel cloth 6 by the dedusting electric field through the gas that the dedusting electric field treatment is crossed, desulfurization discharge electrode 13 links to each other with high-voltage pulse power source, between desulfurization discharge electrode 13 and anode stainless steel cloth 6, apply high pulse voltage, gas in the ionizing electric field produces high energy electron, O-H and O-O key are opened, make it to become free radical and activation particle, the spray point aperture ejection NH of desulfurization discharge electrode 13 ₃Or water vapour, desulfurization discharge electrode 13 is to make with copper pipe, its spray point is the thin copper pipe of hollow, feeds NH in electrode ₃Or gas such as water vapour, gas is sprayed by the spray point aperture.As NH ₃When existing Deng additive, living radical and SO ₂Reaction generates ammonium sulfate, is gathering under the electric field force effect on the anode stainless steel steel wire 6.

Sparge pipe 10 is fixed on the body 3, be positioned at the bottom of discharge electrode 4, by a copper pipe with 15～20 copper nozzles are installed on copper pipe are arranged in a row and form, rhone 15 upper ends are connected with body 3 lower ends, the lower end is connected with drainpipe 16, on the drainpipe 16 valve is installed.Can dispose online dust of anode stainless steel wire and ammonium sulfate like this.By the water under high pressure that sprays in the shower nozzle, with the umbrella shape atomized spray to positive plate, can in the positive plate rotary course, will contain in the sewage inflow rhone 15 of dust attached under dust on the positive plate and the ammonium sulfate flushing timely, and by drainpipe 16 dischargings.Ammonium sulfate collection container 12 is set below desulfurization discharge electrode 13, and collection container 12 lower ends are connected with carrier pipe 14, on the carrier pipe 14 valve are installed, and the water that is dissolved with ammonium sulfate flow in the ammonium sulfate feeder 12, and collect by carrier pipe 14.The crystallization of ammonium sulfate process subsequent handling is separated out, and uses as chemical fertilizer.Clean gas through twice processing of desulfurization and dedusting is discharged by air outlet 9.Air outlet 9 is the clean gas outlets after the dedusting, becomes the cone tubulose of different-diameter according to the different designs of gas treatment amount and flow velocity, conveniently is connected with external pipe.The installation of seal closure 5 be prevent transmission system 7 with the designed protective cover that leaks out, leaks gas of body 3 junction rotary parts, be provided with hermetically-sealed construction at power transmission shaft and body junction, prevent that gas from leaking.

Claims

1. Wet-type desulfurize and dust removing integrated machine, it is characterized in that: be fixed with body (3) on the frame (1), drive roll (7) and motor (8), the front end of body (3) is connected with air inlet (2), the rear end is connected with air outlet (9), the upper end is equipped with seal closure (5) that is fixed on the frame (1) and the drive roll (7) that is positioned at seal closure (5), drainage arrangement and ammonium sulfate gathering-device are installed in the lower end, the interior lower end of body (3) is equipped with driven voller moving up and down (11), and dedusting discharge electrode (4) that links to each other with high-voltage DC power supply and the desulfurization discharge electrode (13) that links to each other with high-voltage pulse power source are installed between drive roll (7) and driven voller (11); Supported by drive roll (7) and driven voller (11) as the stainless steel steel wire (6) of anode, and rotate under the drive of drive roll (7), an end of drive roll (7) links to each other with motor (8) on being fixed on frame (1).

2. Wet-type desulfurize and dust removing integrated machine according to claim 1, it is characterized in that: described drainage arrangement is sparge pipe (10), rhone (15) and drainpipe (16), wherein, sparge pipe (10) is fixed on the bottom that is positioned at discharge electrode (4) on the body (3), 15～20 nozzles are installed on it, rhone (15) upper end is connected with body (3) lower end, and the lower end is connected with drainpipe (16), and drainpipe is equipped with valve on (16).

3. Wet-type desulfurize and dust removing integrated machine according to claim 1 and 2 is characterized in that: described anode stainless steel cloth (6) is set to 4～10 layers.

4. Wet-type desulfurize and dust removing integrated machine according to claim 1 is characterized in that: there is annular knurl on described drive roll (7) surface.

5. Wet-type desulfurize and dust removing integrated machine according to claim 1 and 2, it is characterized in that: described ammonium sulfate gathering-device comprises the ammonium sulfate collection container (12) that is arranged on desulfurization discharge electrode (13) below, collection container (12) lower end is connected with carrier pipe (14), and carrier pipe is equipped with valve on (14).