CN104083961A - Automatic backwashing filter - Google Patents
Automatic backwashing filter Download PDFInfo
- Publication number
- CN104083961A CN104083961A CN201410353068.8A CN201410353068A CN104083961A CN 104083961 A CN104083961 A CN 104083961A CN 201410353068 A CN201410353068 A CN 201410353068A CN 104083961 A CN104083961 A CN 104083961A
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- Prior art keywords
- filter
- pressure sensor
- dust
- automatic back
- gas pressure
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses an automatic backwashing filter. The automatic backwashing filter comprises a shell, ceramic filters, filter fixing plates, a control unit, a compressed air header pipe and backwashing pipes, wherein a dust discharge opening controlled by a dust control valve is arranged below the shell; a dust-contained gas chamber is internally provided with a dust-contained gas pressure sensor; a clean gas chamber is internally provided with a clean gas pressure sensor; a compressed air control valve, the dust-contained gas pressure sensor and the clean gas pressure sensor are all connected with the control unit. According to the invention, the trouble of cleaning the filter by taking down is prevented, and the filter can be automatically backwashed; the ceramic filters act as catalyst carriers for denitrification reaction, and catalysts can be prevented from being poisoned because of attachment of dust by backwashing; the pressure monitoring is timely and accurate; the service life of a filter element can be prolonged.
Description
Technical field
The present invention relates to a kind of filter, especially a kind of automatic back blow filter washer.
Background technology
At present, boat diesel engine burning poor quality fuel oil and power plant produce in tail gas and contain a large amount of pollutants, solids discharge is wherein in atmosphere, improve PM2.5, affect people's living environment, spot ship is seldom discharged in atmosphere after to vent gas treatment by exhaust gas processing device, and International Maritime Organization (IMO) also improves the discharge standard of ship tail gas gradually.
In the equipment of existing filtration tail gas; use the filter,plain cannot the less solid particle of filter sizes; also can be along with exhaust emissions be to atmosphere compared with granule; moreover filter,plain replacement frequency is high; do not possess blowback and wash ability; need artificial frequent disassembly, cleaning, cumulative cost is higher, and filter,plain can not be served as the catalyst carrier in vent gas treatment.
Patent [201210177784.6] discloses a kind of pulse backblowing deashing device of ceramic filter, adopt the pressure reduction of differential pressure pickup monitoring dusty gas chamber and clean gas chamber, front and back gas need to be introduced in differential pressure pick-up and compared, may there is the phenomenon that detection reaction comparatively postpones, and diesel engine vent gas contains more sour gas, be corrosive, the life-span of differential pressure pickup is had a great impact, reduce the physical life of equipment; Differential pressure pickup is arranged between dusty gas chamber and the outlet of filter element collection chamber top, the position of outlet section detected pressures is after the diminishing collection chamber of bore, can cause like this flow velocity to increase, pressure decreased, cannot detect the real pressure difference in filter front and back; In addition, the pulse backblowing deashing device of its disclosed ceramic filter can only filtering particle shape pollutant, and can not remove sulfur-bearing containing nitre pollutant.
Summary of the invention
The present invention is directed to pressure reduction monitoring delay set forth above, inaccurate, existing filter can not be removed the problem of sulfur-bearing containing nitre pollutant, and a kind of automatic back blow filter washer of research and design.The technological means that the present invention adopts is as follows:
A kind of automatic back blow filter washer, comprise housing, ceramic filter, filter fixed head and control module, described housing is provided with tail gas import and tail gas outlet, described filter fixed head is divided into the clean gas chamber on top and the dusty gas chamber of bottom shell intracorporeal space, the openend direction of described ceramic filter is fixed on filter fixed head towards clean gas chamber, also comprise pneumatic manifold and anti-blowing pipe, described anti-blowing pipe one end is positioned at ceramic filter, the other end is connected with pneumatic manifold, described pneumatic manifold is provided with compressed air control valve, the below of described housing is provided with the dust-exhausting port by the control of dust emissions valve, the indoor dusty gas pressure sensor that is provided with of described dusty gas, the indoor clean gas pressure sensor that is provided with of described clean gas, described compressed air control valve, dusty gas pressure sensor is all connected with control module with clean gas pressure sensor.
Further, described dust-exhausting port below is provided with dust-collecting box.
Further, described dusty gas pressure sensor is arranged in the housing sidewall of dusty gas chamber one side, and described clean gas pressure sensor is arranged in the housing sidewall of clean gas chamber one side.
Further, described tail gas import department is provided with the denitration reaction agent spray equipment that can spray denitration reaction agent.
Further, described denitration reaction agent spray equipment is provided with reactant control valve, and described reactant control valve is connected with control module.
Further, described denitration reaction agent is that concentration is the urea water of 30%-40% or the ammoniacal liquor that concentration is 25%-30%.
Further, the aperture of the filtering holes on described ceramic filter is 0.8-2.5 μ m.
Further, in described filtering holes, be attached with denitration reaction catalyst.
Further, the sidewall of described anti-blowing pipe is provided with blowback hole flushing.
Further, described blowback hole flushing is one or both in in-line opening and cross opening.
Compared with the prior art, a kind of automatic back blow filter washer of the present invention has the following advantages:
1, avoid taking off the trouble that filter cleans, can automatically carry out blowback to filter and wash;
2, ceramic filter can be served as the catalyst carrier of denitration reaction, and is washed and can be avoided catalyst to make catalyst poisoning because dust adheres to by blowback;
3, pressure monitoring promptly and accurately;
4, extend the service life of filter core.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention.
Detailed description of the invention
As shown in Figure 1, a kind of automatic back blow filter washer, comprise housing 15, ceramic filter 2, filter fixed head 14 and control module 5, described housing 15 is provided with tail gas import 1 and tail gas outlet 3, described filter fixed head 14 is divided into the clean gas chamber 16 on top and the dusty gas chamber 17 of bottom interior housing 15 space, the openend direction of described ceramic filter 2 is fixed on filter fixed head 14 towards clean gas chamber 16, also comprise anti-blowing pipe 9, described anti-blowing pipe 9 one end are positioned at ceramic filter 2, the other end is connected with pneumatic manifold 8, described pneumatic manifold 8 is provided with compressed air control valve 4, the below of described housing is provided with the dust-exhausting port 18 of being controlled by dust emissions valve 10, in described dusty gas chamber 17, be provided with dusty gas pressure sensor 7, in described clean gas chamber 16, be provided with clean gas pressure sensor 6, described compressed air control valve 4, dusty gas pressure sensor 7 is all connected with control module 5 with clean gas pressure sensor 6, described control module 5 is single-chip microcomputer.
Described dusty gas pressure sensor 7 is arranged in the housing sidewall of dusty gas chamber 17 1 sides, described clean gas pressure sensor 6 is arranged in the housing sidewall of clean gas chamber 16 1 sides, the medium runner cross-sectional area of two pressure sensor setting positions is identical, does not cause pressure differential to monitor inaccurate situation because actual internal area changes.
Described tail gas import 1 place is provided with the denitration reaction agent spray equipment 12 that can spray denitration reaction agent, and tail gas can fully be mixed before the denitration reaction catalyst 21 contacting on ceramic filter 2 with denitration reaction agent, makes denitration reaction more abundant.
Described denitration reaction agent spray equipment 12 is provided with reactant control valve 19, and described reactant control valve 19 is connected with control module 5.
Described denitration reaction agent is that concentration is the urea water of 30%-40% or the ammoniacal liquor that concentration is 25%-30%.The main purpose of mixing with ammoniacal liquor or urea water is after mixing, denitration reaction to occur in ceramic filter 2 (to remove the NO in tail gas
x), its reactive chemistry equation is:
(NH
2)
2CO+H
2O→CO
2+2NH
3
4NO+4NH
3+O
2→4N
2+6H
2O
6NO
2+8NH
3→7N
2+12H
2O
The aperture of the filtering holes 20 on described ceramic filter 2 is 0.8-2.5 μ m.
In described filtering holes, be attached with denitration reaction catalyst 21, when ceramic filter 2 filters out particulate contaminants, denitration reaction occur, remove the sulfurous pollutants in tail gas and contain nitre pollutant.The adherence method of denitration reaction catalyst 21 is: ceramic filter 2 is immersed in to a period of time in catalyst solution, then does drying and processing, denitration reaction catalyst 21 just solidifies and is attached on the hole wall of filtering holes 20.
The sidewall of described anti-blowing pipe 9 is provided with blowback hole flushing 13, and blowback is washed more comprehensively, evenly.
Described blowback hole flushing 13 is one or both in in-line opening and cross opening, opening need ensure the intensity of anti-blowpipe 9, also need to ensure that each direction can both blowing out pressurised air, in-line opening and cross opening can improve flow velocity by throttling action, the in the situation that of same purge pressure, larger than general circular hole or square hole purge scope, effectively the dust being deposited on ceramic filter is blown off.
Described dust-exhausting port 18 belows are provided with dust-collecting box 11, are convenient to collect and timely cleaning dust.
Tail gas is entered by tail gas import 1, by ceramic filter 2, the particulate pollutant containing in tail gas is filtered out, and in ceramic filter 2, carry out denitration reaction, tail gas after treatment is discharged from tail gas outlet 3, dusty gas pressure sensor 7 and clean gas pressure sensor 6 are sent to control module 5 by the pressure signal monitoring and compare analysis, when the dust deposit on ceramic filter 2 too much, the front and back pressure reduction of ceramic filter 2 increases, while reaching certain value, control module 5 will be exported control signal, control off-response agent control valve 19, stop the spray of denitration reaction agent, and control and open compressed air control valve 4, make compressed air enter anti-blowing pipe 9, by blowback hole flushing 13, ceramic filter 2 being carried out to comprehensive blowback washes, the dust being attached on ceramic filter 2 is dropped, be disposed in dust-collecting box 11 by dust-exhausting port 18.Ministry of Industry and Information requires the pressure reduction before and after exhaust gas filter must not be greater than 1800Pa, and therefore, the difference setting between dusty gas pressure sensor 7 and clean gas pressure sensor 6 can not be greater than 1800Pa.
The above; it is only preferably detailed description of the invention of the present invention; but protection scope of the present invention is not limited to this; any be familiar with those skilled in the art the present invention disclose technical scope in; be equal to replacement or changed according to technical scheme of the present invention and inventive concept thereof, within all should being encompassed in protection scope of the present invention.
Claims (10)
1. an automatic back blow filter washer, comprise housing, ceramic filter, filter fixed head and control module, described housing is provided with tail gas import and tail gas outlet, described filter fixed head is divided into the clean gas chamber on top and the dusty gas chamber of bottom shell intracorporeal space, the openend direction of described ceramic filter is fixed on filter fixed head towards clean gas chamber, it is characterized in that: also comprise pneumatic manifold and anti-blowing pipe, described anti-blowing pipe one end is positioned at ceramic filter, the other end is connected with pneumatic manifold, described pneumatic manifold is provided with compressed air control valve, the below of described housing is provided with the dust-exhausting port by the control of dust emissions valve, the indoor dusty gas pressure sensor that is provided with of described dusty gas, the indoor clean gas pressure sensor that is provided with of described clean gas, described compressed air control valve, dusty gas pressure sensor is all connected with control module with clean gas pressure sensor.
2. automatic back blow filter washer according to claim 1, is characterized in that: described dust-exhausting port below is provided with dust-collecting box.
3. automatic back blow filter washer according to claim 1, is characterized in that: described dusty gas pressure sensor is arranged in the housing sidewall of dusty gas chamber one side, and described clean gas pressure sensor is arranged in the housing sidewall of clean gas chamber one side.
4. automatic back blow filter washer according to claim 1, is characterized in that: described tail gas import department is provided with the denitration reaction agent spray equipment that can spray denitration reaction agent.
5. automatic back blow filter washer according to claim 4, is characterized in that: described denitration reaction agent spray equipment is provided with reactant control valve, and described reactant control valve is connected with control module.
6. automatic back blow filter washer according to claim 4, is characterized in that: described denitration reaction agent is that concentration is the urea water of 30%-40% or the ammoniacal liquor that concentration is 25%-30%.
7. automatic back blow filter washer according to claim 1, is characterized in that: the aperture of the filtering holes on described ceramic filter is 0.8-2.5 μ m.
8. automatic back blow filter washer according to claim 7, is characterized in that: in described filtering holes, be attached with denitration reaction catalyst.
9. automatic back blow filter washer according to claim 1, is characterized in that: the sidewall of described anti-blowing pipe is provided with blowback hole flushing.
10. automatic back blow filter washer according to claim 9, is characterized in that: described blowback hole flushing is one or both in in-line opening and cross opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410353068.8A CN104083961A (en) | 2014-07-23 | 2014-07-23 | Automatic backwashing filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410353068.8A CN104083961A (en) | 2014-07-23 | 2014-07-23 | Automatic backwashing filter |
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|---|---|
| CN104083961A true CN104083961A (en) | 2014-10-08 |
Family
ID=51631779
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| CN201410353068.8A Pending CN104083961A (en) | 2014-07-23 | 2014-07-23 | Automatic backwashing filter |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104958961A (en) * | 2015-05-26 | 2015-10-07 | 蚌埠市瑞风净化设备工程有限责任公司 | Automatic cleaning air purifying apparatus |
| CN105709578A (en) * | 2016-03-24 | 2016-06-29 | 上海蓝科石化环保科技股份有限公司 | Flue gas denitrification and dust removal method and system |
| CN107587921A (en) * | 2017-09-09 | 2018-01-16 | 汤刚健 | Adding air cohesion filtration method with cooling replaces ternary catalyzing unit to remove vehicle exhaust |
| CN110421491A (en) * | 2019-08-22 | 2019-11-08 | 北京正和顺汽车部件有限公司 | A kind of shot-blasting machine with dust-extraction unit |
| CN110639364A (en) * | 2019-09-30 | 2020-01-03 | 上海交通大学 | Porous ceramic tubular filtering catalytic denitration unit and flue gas purification method thereof |
| CN112648052A (en) * | 2020-12-25 | 2021-04-13 | 一汽解放汽车有限公司 | Urea tank pressure maintaining control system and maintenance method thereof |
| CN113198269A (en) * | 2021-03-17 | 2021-08-03 | 哈尔滨工业大学（威海） | Movable multifunctional diesel engine tail gas particle trapping device and application |
| CN115121053A (en) * | 2022-08-31 | 2022-09-30 | 国投信开水环境投资有限公司 | Odor recycling treatment device and method |
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| CN201371041Y (en) * | 2009-02-20 | 2009-12-30 | 西安交通大学 | Flue gas dust-removing and denitrifying device |
| CN201735287U (en) * | 2010-07-13 | 2011-02-09 | 科林环保装备股份有限公司 | High-temperature dust remover of ceramic filter drum |
| CN202778098U (en) * | 2012-08-13 | 2013-03-13 | 广东华南工业设计院 | Foamed ceramic high temperature industrial gas filter tube and industrial soot coarse filter prepared by using same |
| CN103816796A (en) * | 2014-03-11 | 2014-05-28 | 中冶焦耐工程技术有限公司 | Low-temperature coke oven flue waste gas desulphurization and denitration process |
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2014
- 2014-07-23 CN CN201410353068.8A patent/CN104083961A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201371041Y (en) * | 2009-02-20 | 2009-12-30 | 西安交通大学 | Flue gas dust-removing and denitrifying device |
| CN201735287U (en) * | 2010-07-13 | 2011-02-09 | 科林环保装备股份有限公司 | High-temperature dust remover of ceramic filter drum |
| CN202778098U (en) * | 2012-08-13 | 2013-03-13 | 广东华南工业设计院 | Foamed ceramic high temperature industrial gas filter tube and industrial soot coarse filter prepared by using same |
| CN103816796A (en) * | 2014-03-11 | 2014-05-28 | 中冶焦耐工程技术有限公司 | Low-temperature coke oven flue waste gas desulphurization and denitration process |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104958961A (en) * | 2015-05-26 | 2015-10-07 | 蚌埠市瑞风净化设备工程有限责任公司 | Automatic cleaning air purifying apparatus |
| CN105709578A (en) * | 2016-03-24 | 2016-06-29 | 上海蓝科石化环保科技股份有限公司 | Flue gas denitrification and dust removal method and system |
| CN105709578B (en) * | 2016-03-24 | 2018-10-30 | 上海蓝科石化环保科技股份有限公司 | A kind of method and system of denitrating flue gas dedusting |
| CN107587921A (en) * | 2017-09-09 | 2018-01-16 | 汤刚健 | Adding air cohesion filtration method with cooling replaces ternary catalyzing unit to remove vehicle exhaust |
| CN110421491A (en) * | 2019-08-22 | 2019-11-08 | 北京正和顺汽车部件有限公司 | A kind of shot-blasting machine with dust-extraction unit |
| CN110639364A (en) * | 2019-09-30 | 2020-01-03 | 上海交通大学 | Porous ceramic tubular filtering catalytic denitration unit and flue gas purification method thereof |
| CN112648052A (en) * | 2020-12-25 | 2021-04-13 | 一汽解放汽车有限公司 | Urea tank pressure maintaining control system and maintenance method thereof |
| CN113198269A (en) * | 2021-03-17 | 2021-08-03 | 哈尔滨工业大学（威海） | Movable multifunctional diesel engine tail gas particle trapping device and application |
| CN113198269B (en) * | 2021-03-17 | 2023-04-07 | 哈尔滨工业大学（威海） | Movable multifunctional diesel engine tail gas particle trapping device and application |
| CN115121053A (en) * | 2022-08-31 | 2022-09-30 | 国投信开水环境投资有限公司 | Odor recycling treatment device and method |
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Application publication date: 20141008 |