CN100384507C

CN100384507C - Pulse self-cleaning type air filter

Info

Publication number: CN100384507C
Application number: CNB2006100388192A
Authority: CN
Inventors: 陈廷国
Original assignee: HUAQIANG POWER EQUIPMENT PLANT ZHENJAING
Current assignee: Jiangsu Huaqiang Electric Equipment Co ltd; Jiangsu Huaqiang New Energy Technology Co ltd
Priority date: 2006-03-14
Filing date: 2006-03-14
Publication date: 2008-04-30
Anticipated expiration: 2026-03-14
Also published as: CN1843561A

Abstract

The present invention relates to a pulse self-cleaning type air filter which comprises a filtering part, a self-cleaning part, a controlling part and a pressure protecting part, wherein the filtering part adopts three-stage filtration; a venturi tube in the self-cleaning part is correspondingly arranged above a filter cartridge in the filtering part, and a negative pressure taking point in a sealed box is connected into a power controlling box in the controlling part; the signal terminal of a PLC micro computer in the power controlling box in the controlling part is connected with an electromagnetic pulse valve connected in series with a compressed air source for self-cleaning and a self-cleaning air source spray head, and a pressure difference alarm in the sealed box is connected in series between the PLC micro computer and a pressure difference controlling meter; a pressure taking point of a negative pressure protecting door is connected in series between the PLC micro computer and the negative pressure protecting door. The pulse self-cleaning type air filter integrates a machine, electricity, air and the filter cartridge, and has the advantages of low air consumption, strong break-out force, favorable flushing effect, long service life and negative pressure protection. The normal running of the filter is not influenced when a filter core is replaced simultaneously. A box body of the filter has favorable sealing performance, and the rate of air leakage is zero. The filtration accuracy is 0.3 mum.

Description

Pulse self-cleaning air filter

Technical field

What the present invention relates to is a kind of pulse self-cleaning air filter, and mechanical, electrical, the gas of its collection, cartridge filter one are filtered and automatic ash removing air, belong to the air cleaner technical field.

Background technology

Roller shutter type, cylinder type, three kinds of filters of cloth-bag type are arranged in the prior art, because its structural reason, they have following defective jointly, and promptly air consumption is big, explosive force weak, developing result is poor, and filtering accuracy has clogging serious more than 5 μ m in the use.If the while is renew cartridge more, then have a strong impact on the normal operation of equipment.Filter box-body sealing structure poor performance, air leak rate of air curtain height, service life is short.

Summary of the invention

The objective of the invention is to defective at above-mentioned existence, a kind of pulse self-cleaning air filter that collects mechanical, electrical, gas, cartridge filter one is proposed, can overcome effectively that the existing in prior technology air consumption is big, explosive force is weak, developing result is poor, while is renew cartridge more, the equipment that influences runs well, and filter box-body sealing structure poor performance, air leak rate of air curtain height, defective such as service life is short.

Technical solution of the present invention: filter box-body adopts normal formula continuous welding steel plate structure, it is characterized in that comprising that filtration, self-cleaning, control, negative pressure protect four parts, wherein filtration fraction divides three-stage filtration, the first order is filtered the screen pack that is provided in a side of in the dirt gas tank, several cartridge filters of installing side by side that are provided in a side of in the dirt gas tank are filtered in the second level, the corresponding setting of self-cleaning source of the gas shower nozzle in each cartridge filter and the self-cleaning part, the third level is filtered the three-stage filtration case that is provided in a side of in the pure air pipe; Each Venturi tube correspondence in the self-cleaning part is arranged on the top of cartridge filter, each Venturi tube is corresponding with cartridge filter joins, Venturi tube is located in the seal box, be located at negative pressure in the seal box and adopt in the dynamic Control case in the pressure point Access Control part, join with pressure transmitter in the dynamic Control case; The signal output part of the PLC micro computer in the dynamic Control case in the control section and an end of electromagnetic impulse valve join, and other two ends of electromagnetic impulse valve join with compressed air source, self-cleaning source of the gas shower nozzle with self-cleaning respectively; The pressure reduction alarm is housed in the dynamic Control case, and pressure reduction alarm two ends connect the signal output part of PLC microcomputerized control signal end, pressure reduction controller respectively; Negative pressure shutter in the negative pressure protection part is contained in the pure air outlet; the end that negative pressure shutter one end and negative pressure shutter are adopted pressure point joins, and the negative pressure shutter is adopted the signal controlling end that the PLC microcomputerized control negative pressure shutter in the other end of pressure point and the dynamic Control case opens and joined.

Advantage of the present invention: collect mechanical, electrical, gas, cartridge filter negative pressure protection five in one; air is filtered integration product with automatic ash removing; product is under the effect of Venturi tube; the used air consumption of backwash is little, explosive force is strong, developing result is good; while is renew cartridge more, and not influence equipment runs well, and filter box-body adopts normal formula continuous welding steel plate structure; good seal performance, air leak rate of air curtain are zero, long service life.Pulse valve can be jetted more than 1,000,000 times, and filtering accuracy can reach efficient H13 (0.3 μ m), two kinds of electric control system employing FPGA controller and integrated circuit controllers.

Description of drawings

Accompanying drawing 1 is the structural representation of pulse self-cleaning air filter.

Among the figure 1 is the dirt gas tank; the 2nd, cartridge filter; the 3rd, Venturi tube; the 4th, negative pressure is adopted pressure point (being the pressure reduction air inlet of pressure transmitter); the 5th, seal box; the 6th, the pure air outlet; the 7th, self-cleaning source of the gas shower nozzle; the 8th, electromagnetic impulse valve; the 9th, the self-cleaning compressed air source of using; the 10th, PLC micro computer (UPD type unit); the 11st, the magnetic valve binding post; the 12nd, pressure reduction alarm (buzzer rang when pressure reduction surpassed setting value); the 13rd, the pressure reduction controller (mainly is to convert pressure difference signal to the signal of telecommunication defeated PLC that issues; be prior art); the 14th, the dynamic Control case; the 15th, power import; the 16th, the deashing dust that comes off; the 17th, dusty gas; the 18th, the negative pressure shutter; the 19th, negative pressure door sampled point, the 20th, three-stage filtration case.

The specific embodiment

Contrast accompanying drawing 1, its structure is to comprise filtration, self-cleaning, control, pressure protect four parts, filtration fraction three-stage filtration wherein, one-level is filtered the screen pack that is located in the dirt gas tank 1, cascade filtration is located at several cartridge filters 2 installed side by side in the casing, self-cleaning source of the gas shower nozzle 7 corresponding settings in each cartridge filter 2 and the self-cleaning part, the third level are filtered and are provided in a side of three-stage filtration casees 20 in the pure air outlet 6, and three-stage filtration case 20 is after cascade filtration; Each Venturi tube 3 correspondence in the self-cleaning part are arranged on the top of cartridge filter 2, each Venturi tube 3 and 2 corresponding joining of cartridge filter, Venturi tube 3 is located in the seal box 5, and negative pressure is adopted in the dynamic Control case in the pressure point 4 Access Controls parts, joins with dynamic Control case internal pressure transmitter; The signal output part of the PLC micro computer 10 in the dynamic Control case in the control section and an end of electromagnetic impulse valve 8 join, other two ends of electromagnetic impulse valve 8 join with compressed air source 9, self-cleaning source of the gas shower nozzle 7 with self-cleaning respectively, pressure reduction alarm 12 is housed in the dynamic Control case 14, and pressure reduction alarm 12 2 ends connect the signal output part of PLC microcomputerized control signal end, pressure reduction controller 13 respectively; Negative pressure shutter 18 in the negative pressure protection part is contained in the pure air outlet 6; electrical control part and PLC in the negative pressure shutter 18 join; the negative pressure shutter is adopted pressure point 19 and is joined with pressure transmitter, and the signal controlling end that the PLC micro computer 10 control negative pressure shutters in the other end of pressure transmitter and the dynamic Control case are opened joins.

Filter process: under the effect of air intake apparatus intake negative-pressure, surrounding air around filter sucks, when air passed the high efficiency filter bucket, dust was because gravity, static, contact are delayed at the lauter tub outer surface, purified air to enter air-purifying chamber and sent by discharge pipe then.

Self-cleaning process: when the pressure in the pure qi (oxygen) case reaches setting value, pressure transmitter work, pressure signal is converted to the signal of telecommunication flows to PLC, because the magnetic valve in the electromagnetic impulse valve is controlled by PLC, when PLC receives the signal of telecommunication that pressure transmitter transports, PLC sends the work of instruction electromagnetic impulse valve, because electromagnetism 3 pulse valve air path part, one end and compressed air source join, one end and self-cleaning shower nozzle join, when electromagnetic impulse valve is opened (startup), magnetic valve starts and the driving pulse valve, and one pressure of abrupt release is the 0.5-0.8Mpa air pulse, through nozzle specially used rectification ejection.Venturi tube entrainments, seal, expand from lauter tub inner uniformly outwards the ejection dust that will accumulate in the lauter tub appearance blow off, self-cleaning process is finished.

Control procedure: PLC micro computer 10 can be set arbitrarily at interval and the self-cleaning time, implements regularly to locate self-cleaning; When pressure reduction beyond target the time, it is self-cleaning that PLC micro computer 10 enters continuous automatically differential pressure; When PLC micro computer 10 is not worked, can implement manually self-cleaning.

The self-cleaning process of blowback be interrupted at every turn only 1 group be in self-cleaning state, remaining is still in work, so filter has online self-cleaning function, to keep continuous operation.

Negative pressure protection process: the effect of negative pressure shutter mainly is to surpass under the situation of setting value at pressure; the shutter that protection does not damage with wind devices; when lauter tub in long-term use; be trapped in the dust on lauter tub surface; because physical phenomenon (as static, gravity, viscose glue etc.); under self-cleaning also ineffective situation; when pressure surpasses setting value; adopt the pressure that pressure point 19 adopted and convert pressure to the signal of telecommunication by pressure transmitter; flow to PLC; PLC sends instruction immediately, and the negative pressure shutter is opened.

Important technological parameters

1. filtering element (cartridge) intake: 20Nm ³/ min.

2. intake: 20～20000Nm ³/ min (fixed) according to customer requirements.

3. system just hinders:＜210pa.

4. system hinders eventually: 500～800pa (user is from adjusting).

5. filter the dirt rate:＞99.99%.

6. filtering accuracy: 0.3 μ m～5 μ m.

7. environment temperature :-40～+ 60 ℃.

8. relative air humidity :≤.

9. power supply: 220V ± 10% 50HZ ± 5.

10. power supply power consumption:＜20W.

11. compressed air consumption:＜0.3Nm ³(air quantity is fixed everywhere).

12. filtering element (cartridge) service life: 〉=8000h～12000h (fixed) with environment.

13. pulse width 40-100ms is adjustable.

14. the pulse spacing, 30-60ms was adjustable.

15. the self-cleaning upper limit 600pa of pressure reduction.

16. self-cleaning lower limit 450pa is adjustable for pressure reduction.

Claims

1. pulse self-cleaning air filter, filter box-body adopts normal formula continuous welding steel plate structure, it is characterized in that comprising that filtration, self-cleaning, control, negative pressure protect four parts, wherein filtration fraction divides three-stage filtration, the first order is filtered the screen pack that is provided in a side of in the dirt gas tank (1), several cartridge filters (2) of installing side by side that are provided in a side of in the dirt gas tank (1) are filtered in the second level, the corresponding setting of self-cleaning source of the gas shower nozzle (7) in each cartridge filter (2) and the self-cleaning part, the third level is filtered the three-stage filtration case (20) that is provided in a side of in the pure air outlet (6); Each Venturi tube (3) correspondence in the self-cleaning part is arranged on the top of cartridge filter (2), each Venturi tube (3) and corresponding joining of cartridge filter (2), Venturi tube (3) is located in the seal box (5), be located at negative pressure in the seal box (5) and adopt in the dynamic Control case (14) in pressure point (4) the Access Control part, join with pressure transmitter in the dynamic Control case (14); The signal output part of the PLC micro computer (10) in the dynamic Control case (14) in the control section and an end of electromagnetic impulse valve (8) join, and other two ends of electromagnetic impulse valve (8) join with compressed air source (9), self-cleaning source of the gas shower nozzle (7) with self-cleaning respectively; Pressure reduction alarm (12) is housed in the dynamic Control case (14), and pressure reduction alarm (12) two ends connect the signal output part of PLC microcomputerized control signal end, pressure reduction controller (13) respectively; Negative pressure shutter (18) in the negative pressure protection part is contained in the pure air outlet (6); the end that negative pressure shutter (18) one ends and negative pressure shutter are adopted pressure point (19) joins, and the negative pressure shutter is adopted the signal controlling end that PLC micro computer (10) the control negative pressure shutter in the other end of pressure point (19) and the dynamic Control case (14) opens and joined.