CN101530707B - Accident protection and control system for bag-type dust remover - Google Patents
Accident protection and control system for bag-type dust remover Download PDFInfo
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- CN101530707B CN101530707B CN2008101019866A CN200810101986A CN101530707B CN 101530707 B CN101530707 B CN 101530707B CN 2008101019866 A CN2008101019866 A CN 2008101019866A CN 200810101986 A CN200810101986 A CN 200810101986A CN 101530707 B CN101530707 B CN 101530707B
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Abstract
The invention relates to an accident protection and control system for a bag-type dust remover, which relates to the technical field of flue gas cleaning and dust removal. The accident protection and control system comprises a boiler and a bag-type dust remover connected with the boiler. The accident protection and control system has the structural characteristic that a temperature and humidity meter is arranged at the outlet of a boiler air preheater. A water spray cooling nozzle, a powder spray nozzle and a flapper value are sequentially arranged on a flue from the boiler to the bag-type dust remover. Differential pressure, temperature and humidity meters are arranged at the inlet and the outlet of the bag-type dust remover. The temperature and humidity meter, the water spray cooling nozzle, the powder spray nozzle, the differential pressure, temperature and humidity meters and a spraying and blowing mechanism in the bag-type dust remover are all connected with a PLC control system into a whole to be controlled. The accident protection and control system ensures the good dust removal effect of the whole dust-removing system while absorbing adhesive dust and protecting the filter bags and has the characteristics of simple process unit, convenient operation, low cost and safe and reliable operation.
Description
Technical field
The present invention relates to gas cleaning and dedusting technology field, especially for the accident protection and control system of sack cleaner.
Background technology
In recent years, the progressively strictness along with the Environmental Protection in China standard made increasing large-sized boiler be tending towards using sack cleaner to replace original water mill deduster or electrostatic precipitator.Sack cleaner can reach strict environmental protection standard requirement preferably, but also exists certain deficiency.The sack cleaner of prior art generally adopts the filter medium of high-temperature filter cloth as its core, and this kind medium is too high in temperature, humidity is excessive or when having oil to exist, very easily damage filter bag, influences the normal use of deduster.In addition, when ignition of the boiler,, there is unburnt diesel oil to enter the sack cleaner zone unavoidably, adheres to form on the filter bag and stick with paste bag owing to use diesel oil combustion-supporting; When serious " four pipes " (referring to water-cooling wall, superheater, reheater, economizer) explosion took place boiler, the water content in the flue gas sharply increased, and this moment is if the excessive filter bag that also easily causes of the aqueous vapor in the flue gas is stuck with paste bag.Because may causing former flue-gas temperature, the fault of original paper such as air preheater surpasses the high-temperature resistant of filtrate during boiler operatiopn, if this moment, a large amount of overtemperature flue gases entered deduster, very easily cause the change of filtrate character to influence life-span of the filter bag, temperature is too high even may be with the filter bag fusion.
Summary of the invention
At above-mentioned problems of the prior art, the purpose of this invention is to provide a kind of accident protection and control system that is used for sack cleaner.It guarantees that whole dust-removal system reaches good dust removing effects, has the advantages that process unit is simple, easy to operate, cost is lower, safe and reliable to operation in absorption adhesive dust, protection filter bag.
In order to reach the foregoing invention purpose, technical scheme of the present invention realizes as follows:
A kind of accident protection and control system that is used for sack cleaner, it comprises boiler and the sack cleaner that is connected with boiler.Its design feature is that described boiler air preheater exit is provided with the temperature and humidity measurement device.Be provided with the spray cooling nozzle on the flue from the boiler to the sack cleaner successively, nozzle and flapper valve dust.The import and export place of sack cleaner all is provided with pressure reduction temperature and humidity measurement device.Spraying and blowing organ in temperature and humidity measurement device, spray cooling nozzle, the nozzle that dusts, pressure reduction temperature and humidity measurement device and the sack cleaner all is connected into one with the PLC control system and controls.
In above-mentioned accident protection and control system, described spray cooling nozzle adopts three groups.
The present invention compared with prior art has the following advantages and good effect:
(1) by spraying one deck powder in advance on the filtrate of nozzle in sack cleaner that dust, this layer powder has the certain protection effect to filtrate.Avoided adhesive dust, oil directly to contact the filter bag infringement that causes with filter material surface.
(2) during fault, by the immediate feedback of temperature and humidity measurement device, these several somes test datas of pressure reduction temperature and humidity measurement device, the PLC control system is controlled spray cooling nozzle, dust nozzle and blowing device, reaches safety programme-control timely.
(3) cost of the present invention low, safe and reliable to operation, more easily promote and be convenient to existing apparatus is transformed.
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Accompanying drawing is a structural representation of the present invention.
The specific embodiment
Referring to accompanying drawing, the present invention includes boiler 2 and the sack cleaner 1 that is connected with boiler 2.Boiler 2 air preheater exits are provided with temperature and humidity measurement device 12.Be provided with three groups of spray cooling nozzles 4 on 1 the flue successively from boiler 2 to sack cleaner, nozzle 3 and flapper valve 7 dust.The import and export place of sack cleaner 1 all is provided with pressure reduction temperature and humidity measurement device 8.Spraying and blowing organ 5 in temperature and humidity measurement device 12, spray cooling nozzle 4, the nozzle 3 that dusts, pressure reduction temperature and humidity measurement device 8 and the sack cleaner 1 all is connected into one with the PLC control system and controls.
Use of the present invention; boiler 2 starts to be thrown before oil, the sack cleaner 1 feeding flue gas; from the filtrate of nozzle 3 in sack cleaner 1 that dust, spray one deck powder in advance; this layer powder has the certain protection effect to filtrate, avoided adhesive dust, oil directly to contact the filter bag infringement that causes with filter material surface.When boiler 2 master controls will be thrown oil, by the PLC control system pressure reduction temperature and humidity measurement device 8 at sack cleaner 1 import and export place is measured earlier.The pressure difference that records is sent to the PLC control system, and the PLC control system changes the mode of operation of spraying and blowing organ 5 according to differential pressure conditions, and determines whether spray into powder by the nozzle 3 that dusts.By allowing the filter bag surface coverage have the ash of suitable thickness to come filter bag is carried out security protection.
When boosters took place for boiler 2, the temperature and humidity measurement device 12 that the air preheater exit arranged was earlier in time reacted to the variation of the temperature and humidity of flue gas.This moment, 8 pairs of sack cleaners of pressure reduction temperature and humidity measurement device, the 1 interior pressure reduction at sack cleaner 1 import and export place was monitored, and stopped spraying and blowing organ 5, made sack cleaner remain on a higher voltage drop value.Simultaneously, the humiture of 8 pairs of flue gases of pressure reduction temperature and humidity measurement device at sack cleaner 1 import and export place is measured, if humidity more then starts the nozzle 3 that dusts, filter bag is further protected.
When boiler 2 air preheaters or other parts broke down, the temperature and humidity measurement device 12 in air preheater exit can in time feed back to the flue gas operating mode PLC control system and start spray cooling nozzle 4, and flue-gas temperature is dropped to rapidly below the filter bag serviceability temperature, the protection filter bag.The pressure reduction temperature and humidity measurement device 8 at pressure reduction temperature and humidity measurement device 8, sack cleaner 1 import and export place detects respectively and shows the temperature of flue gas everywhere.Sack cleaner 1 input gas temperature starts one group of water injector in the spray cooling nozzle 4 greater than when setting value; Continue three minutes (adjustable) water sprays of water spray when starting one group of water injector,, can all start three groups of water injectors of spray cooling nozzle 4 if sack cleaner 1 input gas temperature does not drop to safe temperature when following; When the air preheater exit gas temperature is lower than safe temperature or sack cleaner 1 input gas temperature and is lower than safe temperature, close second and third group water injector; When sack cleaner 1 entrance flue gas temperature is lower than safe temperature 10 degree when following, Close All spray cooling nozzle 4.
Other parts in the system of the present invention, and annexation, the method for operation are all same as the prior art, seldom give unnecessary details at this.
Claims (2)
1. accident protection and control system that is used for sack cleaner; it comprises boiler (2) and the sack cleaner (1) that is connected with boiler (2); it is characterized in that; described boiler (2) air preheater exit is provided with temperature and humidity measurement device (12); be provided with spray cooling nozzle (4) on from boiler (2) to the flue of sack cleaner (1) successively; nozzle (3) and flapper valve (7) dust; advancing of sack cleaner (1); the exit all is provided with pressure reduction temperature and humidity measurement device (8), temperature and humidity measurement device (12); spray cooling nozzle (4); nozzle (3) dusts; spraying and blowing organ (5) in pressure reduction temperature and humidity measurement device (8) and the sack cleaner (1) all is connected into one with the PLC control system and controls.
2. the accident protection and control system that is used for sack cleaner according to claim 1 is characterized in that, described spray cooling nozzle (4) adopts three groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101019866A CN101530707B (en) | 2008-03-14 | 2008-03-14 | Accident protection and control system for bag-type dust remover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101019866A CN101530707B (en) | 2008-03-14 | 2008-03-14 | Accident protection and control system for bag-type dust remover |
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| Publication Number | Publication Date |
|---|---|
| CN101530707A CN101530707A (en) | 2009-09-16 |
| CN101530707B true CN101530707B (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101019866A Active CN101530707B (en) | 2008-03-14 | 2008-03-14 | Accident protection and control system for bag-type dust remover |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106110788A (en) * | 2016-07-22 | 2016-11-16 | 无锡派乐科技有限公司 | A kind of Self-controlled formula workshop dedusting |
| CN106178735A (en) * | 2016-07-22 | 2016-12-07 | 无锡派乐科技有限公司 | A kind of workshop intelligent dedusting system based on remotely monitoring |
| CN106215568A (en) * | 2016-07-22 | 2016-12-14 | 无锡派乐科技有限公司 | A kind of intelligent dust removal system for workshop based on dust Detection & Controling |
| CN105999905A (en) * | 2016-07-22 | 2016-10-12 | 无锡派乐科技有限公司 | Multi-dust-remover distributed workshop dust removal system based on cleaning monitoring |
| CN106110790A (en) * | 2016-07-22 | 2016-11-16 | 无锡派乐科技有限公司 | A kind of dust removal system for workshop based on the pipeline of monitoring cleaning automatically |
| CN106178733A (en) * | 2016-07-22 | 2016-12-07 | 无锡派乐科技有限公司 | A kind of workshop intelligent dedusting system remotely connecting monitoring based on wireless WIFI |
| CN110743267A (en) * | 2019-10-11 | 2020-02-04 | 李桂华 | A bag collector that is used for coal industry to have drying function |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2843586Y (en) * | 2005-10-27 | 2006-12-06 | 夏国权 | Bag type dust collector |
| CN201199036Y (en) * | 2008-03-14 | 2009-02-25 | 同方环境股份有限公司 | Accident protection control device for cloth bag dust remover |
-
2008
- 2008-03-14 CN CN2008101019866A patent/CN101530707B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2843586Y (en) * | 2005-10-27 | 2006-12-06 | 夏国权 | Bag type dust collector |
| CN201199036Y (en) * | 2008-03-14 | 2009-02-25 | 同方环境股份有限公司 | Accident protection control device for cloth bag dust remover |
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| CN101530707A (en) | 2009-09-16 |
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