CN108480042B - Flue gas dust removal device and dust removal process thereof - Google Patents
Flue gas dust removal device and dust removal process thereof Download PDFInfo
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- CN108480042B CN108480042B CN201810189686.1A CN201810189686A CN108480042B CN 108480042 B CN108480042 B CN 108480042B CN 201810189686 A CN201810189686 A CN 201810189686A CN 108480042 B CN108480042 B CN 108480042B
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- dust collector
- electric dust
- air inlet
- flue
- flue gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
- B03C3/014—Addition of water; Heat exchange, e.g. by condensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/04—Plant or installations having external electricity supply dry type
Abstract
The invention discloses a flue gas dust removal device which comprises an air inlet flue, an electric dust remover, a fan, a chimney, a drying device and a hot air pipe for introducing high-temperature flue gas, wherein the drying device is arranged on the air inlet flue, the air inlet flue and the hot air pipe are both communicated with an inlet of the electric dust remover, and an outlet of the electric dust remover is connected with the chimney through the fan. The flue gas dust removal process comprises the following steps: 1) mixing the dust gas dried by the drying equipment and the high-temperature flue gas introduced by the hot air pipe, and introducing the mixture into an electric dust remover; 2) the wind speed of an electric field in the electric dust collector is controlled between 0.6 and 1.5 m/s; 3) the dust is collected by the electric dust collector and is conveyed into the powder bin through the dust conveying equipment, and the purified flue gas is discharged through the fan and the chimney. Ensures the dust to be stably discharged up to the standard and has safe operation.
Description
Technical Field
The invention relates to the technical field of flue gas dust removal, in particular to a flue gas dust removal device and a dust removal process thereof.
Background
At present, a wet dust removal system is mostly adopted for drying smoke at home and abroad, the wet dust removal system has low efficiency, the emission is difficult to meet the current national standard, the sediment discharged by a wet dust collector needs to be treated, the clarified washing water needs to be recycled, otherwise, the secondary pollution is caused, and the waste of water resources is also caused. The wet dust removal generates waste water, a waste water disposal system is required to be additionally built, and the operation and investment costs are high. If the bag type dust removal system is adopted for drying flue gas, the national dust emission standard can be met, but because the flue gas contains a large amount of water vapor, the water vapor is easy to condense due to temperature change, a bag type dust removal filter bag is easy to block, the flue gas circulation effect is poor, and finally the bag type dust removal is ineffective, so that the bag type dust removal is difficult to apply.
The electric dust removal process is adopted, so that the generation of sewage can be effectively avoided, and the occurrence of water pollution events is avoided; however, the electrostatic precipitator is also disadvantageous to use due to high moisture content of flue gas and large temperature fluctuation of the flue gas, and has poor stability.
In summary, the treatment of the dust in the drying flue gas is a difficult problem in the treatment of atmospheric pollution, and the existing dust removal device and dust removal process have not effectively solved the problem.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a flue gas dust removal device and a dust removal process thereof so as to achieve the purposes of ensuring stable standard emission of dust and safe operation.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
this flue gas dust collector, including air inlet flue, electrostatic precipitator, fan and chimney, still include drying equipment and the hot-blast main that is used for introducing the high temperature flue gas, drying equipment establishes on air inlet flue, and air inlet flue and hot-blast main all are linked together with electrostatic precipitator's import, and the export of electrostatic precipitator passes through the fan and links to each other with the chimney.
Furthermore, the air inlet flue is in butt joint with the inlet of the electric dust collector, and the hot air pipe is connected to the air inlet flue.
Still include defeated grey equipment and powder storehouse, the lower part of electrostatic precipitator is equipped with a set of ash bucket, and a set of ash bucket all links to each other with defeated grey equipment, and defeated grey equipment links to each other with the top in powder storehouse.
And a thermocouple is arranged on the air inlet flue close to the inlet of the electric dust collector.
And a CO alarm is arranged at the inlet of the electric dust collector.
The inlet of the electric dust collector is connected with the air inlet flue through a section of dust removal pipeline.
A flue gas dust removal process comprises the following steps:
1) mixing the dust gas dried by the drying equipment and the high-temperature flue gas introduced by the hot air pipe, and introducing the mixture into an electric dust remover;
2) the wind speed of an electric field in the electric dust collector is controlled between 0.6 and 1.5 m/s;
3) the dust is collected by the electric dust collector and is conveyed into the powder bin through the dust conveying equipment, and the purified flue gas is discharged through the fan and the chimney.
Compared with the prior art, the invention has the following advantages:
the flue gas dust removal device and the dust removal process thereof are reasonable in design, and due to the introduction of hot flue gas, the stability and the safety of a system are improved due to the installation of the CO alarm, the dust removal problem of the drying flue gas is solved, and the emission of the drying flue gas meets the national pollutant emission standard.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a schematic view of the apparatus of the present invention.
In the figure:
1. the device comprises an air inlet flue, 2 hot air pipes, 3 regulating valves, 4 thermocouples, 5 powder bins, 6 electric dust collectors, 7 ash conveying equipment, 8 air outlet pipes, 9 fans and 10 chimneys.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.
As shown in fig. 1, the flue gas dust removal device comprises an air inlet flue 1, a hot air pipe 2, an adjusting valve 3, a thermocouple 4, a powder bin 5, an electric dust remover 6, an ash conveying device 7, an air outlet pipe 8, a fan 9 and a chimney 10.
The hot-blast main 2 is used for introducing high temperature flue gas, and drying equipment establishes on the air inlet flue, and air inlet flue 1 and hot-blast main 2 all are linked together with electrostatic precipitator's import, and electrostatic precipitator's export even has out the tuber pipe, and it links to each other with the chimney to go out the tuber pipe through the fan.
The air inlet flue 1 is butted with the inlet of the electric dust collector 6, and the hot air pipe is connected on the air inlet flue. Furthermore, the inlet of the electric dust collector is connected with the air inlet flue through a section of dust removal pipeline. The connection between the hot air pipe and the air inlet flue has a certain distance to the inlet of the electric dust collector, so that the mixed heating effect is ensured.
The lower part of the electric dust collector 6 is provided with a group of ash hoppers which are connected with an ash conveying device 7, the ash conveying device 7 is connected with the top of the powder bin 5, and the powder bin 5 collects dust to a certain height and discharges the dust to a vehicle for outward transportation.
The flue gas that dries passes through behind the dust removal pipeline, gets into inside the electrostatic precipitator, when dust particle passes through high-voltage electrostatic field in the flue gas, makes the smoke and dust positive charge, then the flue gas gets into the electrostatic precipitator passageway that sets up the multilayer negative plate. The smoke dust with positive charges and the cathode electroplate mutually adsorb, so that the particle smoke dust in the smoke dust is adsorbed on the cathode, and the purified smoke dust is discharged after reaching the standard through the dust removal fan and the chimney. The electric dust collector strikes the negative plate at regular time, so that smoke dust with certain thickness falls down in an ash hopper below the electric dust collector structure under the dual functions of self weight and vibration, and is transported outside through ash conveying equipment.
Because the temperature change of the drying flue gas is large in the production process, the condensation is easily formed in an electric field at the temperature of 40-60 ℃, so that the dust accumulation of polar plates and polar lines is caused, and the dust removal efficiency is reduced. In order to avoid electric field condensation, hot air is introduced to enter a main dedusting pipeline, and a valve is arranged for adjustment, so that the temperature of the flue gas is ensured to be above the dew point.
Considering that the heating furnace uses coal gas to heat, CO leakage is possible to occur in the production process, in order to ensure the safe operation of the electric dust collector, a CO alarm is arranged on an inlet pipeline of the electric dust collector and is interlocked with a high-voltage electric field, and two sides of the electric dust collector body are respectively provided with an explosion-proof hole, so that the safety of equipment is ensured.
The flue gas dried in the drying equipment enters an electric dust collector 6 through an air inlet flue 1, and the air inlet flue 1 is connected with the electric dust collector 6 through a flange; the wind speed of the electric field of the electric dust collector 6 is controlled between 0.6 m/s and 1.5m/s, so that the dust can be effectively trapped in the electric dust collector; the outside of the electric dust collector 6 is subjected to heat preservation treatment, so that the temperature loss in an electric field is reduced.
The hot air pipe 2 is made of 310S and can resist high temperature, and the hot air pipe 2 is connected with the air inlet flue 1 in a welding manner; the regulating valve 3 is arranged on the hot blast pipe 2 through a flange, and the regulating valve 3 controls the amount of flue gas entering the air inlet flue 1 through regulating the opening degree, so that the temperature entering the electric dust collector 6 is controlled; the thermocouple 4 is installed on the air inlet flue 1 through a flange, and measures the temperature entering the electric dust collector 6.
The electric dust collector 6 is connected with the air outlet pipe 8 through a flange; the air outlet pipe 8 is connected with the fan 9 through a flange; the fan 9 and the chimney 10 are connected through a short pipe.
In the running process of the electric dust collector 6, dust is collected by the electric dust collector 6 and is conveyed into the powder bin 5 through the dust conveying equipment 7, and the electric dust collector 6 is connected with the dust conveying equipment 7 through a flange; the ash conveying device 7 is connected with the powder bin 5 through a short pipe. Dust is collected to a certain height in the powder bin 5 and is discharged to a vehicle for outward transportation.
The above-mentioned features are merely for describing preferred embodiments of the present invention and may be arbitrarily combined to form a plurality of embodiments of the present invention.
The invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the inventive concept and solution, or to apply the inventive concept and solution directly to other applications without modification.
Claims (1)
1. The utility model provides a flue gas dust collector, includes air inlet flue, electrostatic precipitator, fan and chimney, its characterized in that: the drying device is arranged on the air inlet flue, the air inlet flue and the hot air pipe are communicated with the inlet of the electric dust collector, and the outlet of the electric dust collector is connected with the chimney through a fan;
the air inlet flue is butted with an inlet of the electric dust collector, and the hot air pipe is connected to the air inlet flue;
the lower part of the electric dust collector is provided with a group of ash hoppers which are connected with the ash conveying equipment, and the ash conveying equipment is connected with the top of the powder bin;
the joint between the hot air pipe and the air inlet flue has a certain distance to the inlet of the electric dust collector;
the inlet of the electric dust collector is connected with the air inlet flue through a section of dust removal pipeline;
a CO alarm is arranged at the inlet of the electric dust collector;
a valve is arranged on the hot air pipe;
a thermocouple is arranged on the air inlet flue close to the inlet of the electric dust collector;
the hot air pipe is connected with the air inlet flue in a welding way; the regulating valve is arranged on the hot blast pipe through a flange, and the regulating valve controls the amount of flue gas entering the air inlet flue through regulating the opening degree, so that the temperature entering the electric dust collector is controlled; the thermocouple is arranged on the air inlet flue through a flange and measures the temperature entering the electric dust collector;
the wind speed of the electric field of the electric dust collector is controlled between 0.6 and 1.5 m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810189686.1A CN108480042B (en) | 2018-03-08 | 2018-03-08 | Flue gas dust removal device and dust removal process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810189686.1A CN108480042B (en) | 2018-03-08 | 2018-03-08 | Flue gas dust removal device and dust removal process thereof |
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| Publication Number | Publication Date |
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| CN108480042A CN108480042A (en) | 2018-09-04 |
| CN108480042B true CN108480042B (en) | 2021-01-26 |
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| CN201810189686.1A Active CN108480042B (en) | 2018-03-08 | 2018-03-08 | Flue gas dust removal device and dust removal process thereof |
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| JPS5333473A (en) * | 1976-09-09 | 1978-03-29 | Kubota Ltd | Electric dust collector |
| JPS54110973A (en) * | 1978-02-20 | 1979-08-30 | Kawasaki Heavy Ind Ltd | Apparatus for firing powdered material such as alumina |
| CN1037541A (en) * | 1988-11-23 | 1989-11-29 | 冶金工业部北京钢铁设计研究总院 | The blast furnace gas control method for lowering temp |
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| CN203400612U (en) * | 2013-07-02 | 2014-01-22 | 香港诺曼泰壹环保科技有限公司 | Flue gas purification system |
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| CN1175918C (en) * | 2000-07-11 | 2004-11-17 | 清华大学 | Semi-dry fume-purifying linear pulse electron beam method |
| CN2544812Y (en) * | 2002-05-14 | 2003-04-16 | 高国纯 | Electric asphalt fume dust-collecting purifying device |
| CN2827539Y (en) * | 2005-09-29 | 2006-10-18 | 诸暨市顺安电力环保设备厂 | Electric dust separator |
| CN102527178A (en) * | 2011-12-29 | 2012-07-04 | 江西理工大学 | Method for removing dust from furnace gas of phosphorus-making electric furnace |
| CN204768112U (en) * | 2015-05-29 | 2015-11-18 | 广东龙正节能环保科技有限公司 | Biomass boiler sack cleaner with dehydrating unit |
| CN204865307U (en) * | 2015-07-17 | 2015-12-16 | 沈阳兹园环保科技有限公司 | Fire -retardant bag dusting system |
| CN106563331A (en) * | 2015-10-12 | 2017-04-19 | 湖北三宁化工股份有限公司 | Baking, dedusting and purifying system for flue gas |
| CN206082035U (en) * | 2016-09-19 | 2017-04-12 | 青岛和德隆机械有限公司 | Flue gas dust removal clean system |
| CN206837686U (en) * | 2017-04-27 | 2018-01-05 | 安徽新力电业高技术有限责任公司 | A kind of sack cleaner flue gas recirculation heating system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5333473A (en) * | 1976-09-09 | 1978-03-29 | Kubota Ltd | Electric dust collector |
| JPS54110973A (en) * | 1978-02-20 | 1979-08-30 | Kawasaki Heavy Ind Ltd | Apparatus for firing powdered material such as alumina |
| CN1037541A (en) * | 1988-11-23 | 1989-11-29 | 冶金工业部北京钢铁设计研究总院 | The blast furnace gas control method for lowering temp |
| CN102743951A (en) * | 2011-04-21 | 2012-10-24 | 贵阳铝镁设计研究院有限公司 | Asphalt smoke purification method and device |
| CN203400612U (en) * | 2013-07-02 | 2014-01-22 | 香港诺曼泰壹环保科技有限公司 | Flue gas purification system |
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| CN108480042A (en) | 2018-09-04 |
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Address after: 243003 8 Jiuhua Road, Yushan, Ma'anshan, Anhui Applicant after: Ma'anshan Iron and Steel Co., Ltd. Address before: 243003 Intellectual Property Department, Technical Center No. 8, Hunan West Road, Yushan District, Ma'anshan City, Anhui Province Applicant before: Ma'anshan Iron and Steel Co., Ltd. |
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