CN2288354Y

CN2288354Y - Semi-wet vertical box type electric duster

Info

Publication number: CN2288354Y
Application number: CN96240438U
Authority: CN
Inventors: 陈国榘; 马洁梅; 陈坚; 冯肇霖; 刘民义
Original assignee: Guangzhou Institute of Energy Conversion of CAS
Current assignee: Guangzhou Institute of Energy Conversion of CAS
Priority date: 1996-12-30
Filing date: 1996-12-30
Publication date: 1998-08-19
Anticipated expiration: 2006-12-30

Abstract

The utility model provides a semi-wet vertical box type electric dust remover, relating to a dust-removing device of a coal burning boiler. The utility model is characterized in that a vertical box type structure is adopted; a dust-removing electrode composed of an anode plate of an opening-checker form and a cathode corona-wire of a radiation-type needle-shaped structure placed at the center of the checker is arranged in a vertical flue; the upper part of each checker of the dust-removing electrode is provided with a nozzle system which periodically spray water to remove the dust, particularly a splash taper type nozzle system with directly jetting holes. The utility model can be used as an individual, and can also be matched with a wet type electric dust remover to be used. The utility model has the advantages of simple structure, small occupation of land and high dust-removing effect.

Description

Half wet process vertical box type electric cleaner

The utility model belongs to electric dust-removing equipment, particularly the dust arrester of coal-burning boiler.

Hydrofilter is still one of main cleaner of China's coal-burning boiler at present.The efficiency of dust collection of this deduster is generally 87.5～95%, but still has some outstanding problems in the practice: 1. the soot emissions of part deduster exceed standard more serious; 2. flue gas with water causes the vibration of air-introduced machine vane dust deposition, often forces blowing out or off-loading, the influence safety in production; 3. the water consumption is higher, and buck causes secondary pollution; 4. easily cause plant area's fall " ash group ".The employing horizontal type electric dust collector is also arranged in addition, but also exist flue dust characteristic (than resistance, temperature etc.) is compared sensitivity, and investment is high, it is big to take up an area of volume, and the engineering time is long, shortcomings such as rapping generation reentrainment of dust and noise pollution during operation.

The purpose of this utility model is the problem that exists at above prior art, proposes a kind of half wet process vertical box type electric cleaner, can avoid environmental pollution effectively, and occupation of land is few, and cost is low, the efficiency of dust collection height.This electric cleaner both can use separately, also can be serially connected in the back of existing wet scrubber, improved the efficiency of dust collection of former wet scrubber effectively, and eliminated the defective of its existence.

Structure of the present utility model, comprise housing, and have import and export flue, electrodes for removing dust as exhaust gases passes, high and low voltage electric distribution equipment and regular spray water system, it is characterized in that housing is a vertical box type, the vertical dust removing electrode is set, said electrodes for removing dust in the vertical flue in the railway carriage or compartment, its positive plate is opening grid form, a plurality of criss-cross positive plates are formed array, and it is determined according to the requirement of flue dust character and dust emission concentration with die opening 2b, is generally the scope of 450mm～850mm.The center of each grid has the cathodic electricity hachure of acicular texture.Emanant corona needle point points to around the criss-cross positive plate and four jiaos of grid, can make the quadrangle of grid become to help the vortex of control of dust, and the opening of positive plate grid then helps the flow through flue gas of grid of uniform distribution and flows.

Be equiped with the nozzle system of regular shower water deashing at the top of deduster, a nozzle promptly is set on the top of each anode grid, this nozzle carries out regular shower water deashing by solenoid control.

For further improving the effect of shower water deashing, the utility model proposes a kind of splashing cone type structure nozzle with direct perforation, the cone-apex angle α of this nozzle is 45 °～80 °, uniform some direct perforations on the awl, have simple in structure, be difficult for to stop up, guarantee when regular water spray can the Rapid Cleaning positive plate and corona wire on dust stratification.

The utility model also is provided with necessary deflector in importing and exporting flue, be evenly distributed to guarantee the air-flow in the electric field.

The utility model can singlely use, and also can a plurality of series connection use.

The utility model is owing to be vertical, thereby takes up an area of fewly, and simple in structure, is convenient to construction and maintenance, is convenient to cooperate with water film type duster, has higher efficiency of dust collection.Install this half wet process vertical box type electric cleaner additional after general water dust scrubber, efficiency of dust collection is brought up to more than 98%, it is about 8% also can to improve the sulfur dioxide removal rate, thereby satisfies the environmental protection standard requirement.

Below be drawing explanation of the present utility model:

Fig. 1 is a half wet process vertical box type electric cleaner structural representation;

Fig. 2 is the cutaway view of the electrodes for removing dust array of half wet process vertical box type electric cleaner;

Fig. 3 is for to the analysing and observe of a grid electrode (K to) figure;

Fig. 4 is the splashing cone type structure of nozzle schematic diagram of band direct perforation.

The CONSTRUCTED SPECIFICATION of the utility model embodiment is described in detail in detail below in conjunction with accompanying drawing:

As Fig. 1, shown in 2, this half wet process vertical box type electric cleaner has vertical box type housing 1, the housing middle part is a flue, the bottom is an ash bucket 2, top is provided with high and low voltage electric distribution equipment 3, electrodes for removing dust is set in flue, comprise the positive plate 4 that is the opening criss-cross, with die opening 2b is 640mm, the emanant acicular texture cathodic electricity of the center suspension of criss-cross positive plate hachure 5, needle point points to around the grid and four corners, positive plate and corona wire all adopt the stainless steel manufacturing, and positive plate also can adopt Q235A carbon steel outer lining conduction flame retardant epoxy fiberglass, perhaps is coated with conduction fire retardant, anticorrosive coating with the Q235A carbon steel, guarantee that positive plate and corona wire have stronger decay resistance, increase the service life.

Be equiped with water injection system 6 at the top of deduster, water injection system comprises a plurality of nozzles 7, and a nozzle is set on the top of each grid electrode, and nozzle is the splashing cone type structure of band direct perforation 8.The apex angle that this nozzle spatters awl is 45 ° and 60 ° two kinds, is 45 ° at the nozzle α that imports and exports on the flue edge electrodes, and the nozzle α on the middle place electrode is 60 °, and nozzle is connected with water injection system by articulation 9.

This deduster is made of two housing series connection, but only joins a high voltage power supply device, and identical dedusting positive electrode and cathodic electricity hachure are roughly the same arranged in each housing.Flue gas enters from the upper inlet flue 10 of first housing, the electrodes for removing dust of the flue by first housing from top to bottom, after entering second housing from the bottom, the electrodes for removing dust of the flue by second housing flows out from the top exhaust pass 11 of second housing from bottom to top then again.In importing and exporting flue, be provided with deflector 12, be evenly distributed to guarantee the air-flow in the electric field.

The venturi wet dust collector of a 75t/h pulverized-coal fired boiler, former efficiency of dust collection＜90%, concentration of emission 〉=1300mg/Nm ³, install a playscript with stage directions half wet process vertical box type electric cleaner additional, exhaust smoke level about 12.8 * 10 ⁴m ³/ h, each anode grid 640mm * 640mm, combined dust-eliminating efficient reaches more than 98.6%.

Claims

1. half wet process vertical box type electric cleaner, comprise housing, import and export flue, ash bucket, electrodes for removing dust, high and low voltage electric distribution equipment and regular spray water system as exhaust gases passes, it is characterized in that housing (1) is a vertical box type, the vertical dust removing electrode is set in the vertical flue in the railway carriage or compartment, the positive plate of said electrodes for removing dust (4) is the opening criss-cross, a plurality of criss-cross positive plates are formed array, the center of each anode grid has the cathodic electricity hachure (5) of emanant acicular texture, and the nozzle (7) of a regular shower water deashing is set on the top of each anode grid.

2. by the described half wet process vertical box type of claim 1 electric cleaner, it is characterized in that the vertical dust removing electrode is 450～850mm with die opening 2b.

3. by the described half wet process vertical box type of claim 1 electric cleaner, the emanant needle point that it is characterized in that the cathodic electricity hachure points to around the criss-cross positive plate and four jiaos of grids.

4. by the described half wet process vertical box type of claim 1 electric cleaner, it is characterized in that the splashing cone type structure of regular shower water deashing nozzle (7) for band direct perforation (8), the apex angle of awl is 45 °～80 °.

5. by the described half wet process vertical box type of claim 1 electric cleaner, it is characterized in that importing and exporting and be provided with deflector in the flue.

6. by the described half wet process vertical box type of claim 1 electric cleaner, it is characterized in that positive plate (4) and cathodic electricity hachure (5) adopt stainless steel material to make.

7. by the described half wet process vertical box type of claim 1 electric cleaner, it is characterized in that positive plate adopts Q235A steel outer lining conduction fire retardant, anticorrosive coating to make.