CN101476007A - Dry dust collection method and apparatus for blast furnace gas - Google Patents
Dry dust collection method and apparatus for blast furnace gas Download PDFInfo
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- CN101476007A CN101476007A CNA2008102362139A CN200810236213A CN101476007A CN 101476007 A CN101476007 A CN 101476007A CN A2008102362139 A CNA2008102362139 A CN A2008102362139A CN 200810236213 A CN200810236213 A CN 200810236213A CN 101476007 A CN101476007 A CN 101476007A
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Abstract
A blast furnace gas dry type dust collection method, a paralleled gas drying equipment is provided after the gravity dust collector and before the cloth bag dust remover in the blast furnace gas dry type dust collection system as a constituent part of the blast furnace gas dry type dust collection system, and a temperature sensor is provided on the export of the gravity dust collector; when the system export (the blast furnace) generates low-temperature raw coal gas, the humidity is usually relatively high, before the cloth bag dust remover performs dust exhaustion, the gas from the export of the gravity dust collector passes through the paralleled gas drying equipment, the gas drying equipment firstly performs dehumidification processing to the raw coal gas to remove the water in the raw coal gas, and then enters into the cloth bag dust remover for dust exhaustion; when the temperature of the blast furnace raw coal gas is in a normal range, the blast furnace raw coal gas enters the gravity dust collector through a raw gas pipeline to perform coarse dust exhaustion, and then directly enters the cloth bag dust remover for dust exhaustion, the clean gas after dust exhaustion enter in the pressure reducing valve through a clean gas pipeline for pressure reduction, and finally loads in a gas holder through the clean gas pipeline.
Description
Technical field
The invention belongs to the dedusting technology field, particularly a kind of blast furnace gas dry dusting novel process that has the coal gas dehydrating unit comprises method for dust removal and device.
Background technology
Existing blast furnace gas dry dusting technology is mainly by raw gas pipeline, gravitational precipitator, sack cleaner, reducing valve group, purified gas pipeline and diffuse chimney etc. and form.Wherein play the sack cleaner of main dedusting effect, handle gas temperature between 90 ℃～250 ℃.Gas temperature is low excessively, the filter bag dewfall, and dust bonding not only increases the breakage of filter bag, also gives and unloads ash, defeated ash causes difficulty, directly influences the normal operation of dust-removal system.For sack cleaner is normally moved, never the coal gas that allowable temperature is low excessively enters sack cleaner, can only enter by-pass line by diffusing smoke stack emission.A large amount of so poisonous dust-laden coal gas directly enter atmosphere, have both lost the considerable energy, again environment are caused great pollution.
Summary of the invention
The present invention seeks to: can handle low temperature coal gas for making dust-removal system, avoid environmental pollution, the energy that reclaim more, task of the present invention provides a kind of blast furnace gas dry dusting novel process and isolated plant that has the coal gas dehydrating unit, and it has solved that existing blast furnace gas dry dusting technology can not be handled low temperature coal gas and the problem that can only diffuse.
Technical scheme of the present invention is as follows: the blast furnace gas dry dusting method, in the blast furnace gas dry dusting system, set up coal gas dehydrating unit 3 in parallel after the gravitational precipitator 2, and it is arranged on the sack cleaner front, as an integral part of blast furnace gas dry dusting system, the gravitational precipitator outlet is provided with temperature sensor; When system outlet is blast furnace generation low temperature raw gas, usually psychromatic ratio is higher, before sack cleaner carries out dedusting, coal gas dehydrating unit from the coal gas of gravitational precipitator outlet from parallel connection carries out dehumidification treatments by the coal gas dehydrating unit to the low temperature raw gas earlier, enters the sack cleaner dedusting after removing the moisture in the raw gas.Water becomes liquid state by gaseous state in dehumidification process, can discharge a large amount of heats, and these heats have heated the low temperature raw gas again, and the raw gas temperature is raise.After coal gas dehydrating unit dehumidification treatments, raw gas humidity＜50～55%, temperature〉90 ℃, satisfy the sack cleaner operating requirement fully.Behind the coal gas dehydrating unit, meet the requirements of raw gas and can enter sack cleaner and carry out dedusting, the purified gas after the dedusting just can be recycled.
The dehydrating unit that blast furnace gas dry dusting is used, between gravitational precipitator 2 in the blast furnace gas dry dusting system and sack cleaner, set up coal gas dehydrating unit in parallel, described coal gas dehydrating unit tube structure, inside is provided with multilayer dehumidifying layer, between each dehumidifying layer, the coal gas division plate is set, makes coal gas be divided into several roads respectively by each dehumidifying floor.
Be to adapt to the characteristics of blast furnace gas, the coal gas dehydrating unit has particular requirement, requires airtight can not the leakage, and will bear certain pressure and temperature, operating pressure〉0.2MPa, working temperature〉250 ℃.Coal gas dehydrating unit housing is a tube structure, and inside is provided with multilayer dehumidifying layer, between each dehumidifying layer the coal gas division plate is set, and makes coal gas be divided into several roads respectively by each dehumidifying floor.
After moisture adsorbent absorption moisture in the dehydrating unit acquires a certain degree, moisture adsorbent need be taken out usually, put the regenerating unit of other setting into, consumes energy is carried out thermal regeneration to it.The regeneration of this coal gas dehydrating unit moisture adsorbent does not need moisture adsorbent is taken out, and blast furnace gas temperature can directly enter coal gas dehydrating unit heating moisture adsorbent when 200 ℃ of left and right sides, make moisture adsorbent regeneration, has saved the regenerating unit and the energy.
The invention has the beneficial effects as follows: though at present dedusting of blast furnace gas has two kinds of wet method and dry method, dedusting technology is each has something to recommend him.But the present invention can carry out whole process to blast furnace gas to be handled, and makes dry dedusting technology further perfect, the purified gas better quality, coal-gas recovering is more, the energy-saving and environmental protection effect is obvious, has given full play to the superiority of dry dedusting technology, can replace the wet dedusting technology fully.
Description of drawings
Fig. 1 is a kind of blast furnace gas dry dusting new technological flow synoptic diagram that has the coal gas dehydrating unit of the present invention.
Fig. 2 is a coal gas dehydrating unit structural representation.
Embodiment
Referring to Fig. 1, the present invention is a kind of blast furnace gas dry dusting novel process that has the coal gas dehydrating unit, and it comprises raw gas pipeline 1, gravitational precipitator 2, coal gas dehydrating unit 3, sack cleaner 4, reducing valve group 5, purified gas pipeline 6 and diffuses chimney 7.
Coal gas dehydrating unit 3 is cylindrical structures.Coal gas dehydrating unit 3 comprises inlet pipe 3-1, housing 3-2, dehumidifying layer (containing moisture adsorbent) 3-3, division plate 3-4, escape pipe 3-5.And the intravital dehumidifying layer of shell is multilayer dehumidifying layer, between each dehumidifying layer the coal gas division plate is set, and makes coal gas be divided into several roads respectively by each dehumidifying floor; Inlet pipe 3-1, escape pipe 3-5 are located on the housing.
(3-3) end of dehumidifying layer is connected with inlet pipe 3-1, division plate 3-4 lower side, and dehumidifying layer (containing moisture adsorbent) 3-3 the other end is connected with division plate 3-4 upside, escape pipe 3-5 respectively.Dehumidifying layer (containing moisture adsorbent) 3-3 two avris also are connected with housing 3-2; Dehumidifying layer horizontal positioned places on the reticular lamina.The moisture adsorbent of dehumidifying moisture adsorbent layer can adopt inorganic materials such as calcium chloride, silica gel, calcium oxide.
Housing 3-2 is a tube structure.Housing 3-2 is connected with inlet pipe 3-1, dehumidifying layer (containing moisture adsorbent) 3-3, division plate 3-4, escape pipe 3-5 respectively.
Dehumidifying layer (containing moisture adsorbent) 3-3 one end is connected with inlet pipe 3-1, division plate 3-4 lower side respectively, and dehumidifying layer (containing moisture adsorbent) 3-3 the other end is connected with division plate 3-4 upside, escape pipe 3-5 respectively.Dehumidifying layer (containing moisture adsorbent) 3-3 two avris also are connected with housing 3-2;
Division plate 3-4 lower side is connected with inlet pipe 3-1, dehumidifying layer (containing moisture adsorbent) 3-3 one end respectively, and division plate 3-4 upside is connected with dehumidifying layer (containing moisture adsorbent) 3-3 the other end, escape pipe 3-5 respectively.Division plate 3-4 two avris also are connected with housing 3-2;
Coal gas dehydrating unit 3 is arranged between gravitational precipitator 2 and the sack cleaner 4, and the inlet pipe 3-1 of coal gas dehydrating unit 3 is connected with the raw gas pipeline 1 of both sides respectively with escape pipe 3-5.
Gravitational precipitator 2 is cylindrical structures.Gravitational precipitator 2 is arranged between blast furnace and the coal gas dehydrating unit 3, gravitational precipitator 2 top inlet mouths connect with the raw gas pipeline 1 that is connected blast furnace, and gravitational precipitator 2 air outlets connect with the raw gas pipeline 1 that is connected coal gas dehydrating unit 3 and connection sack cleaner 4.
Sack cleaner 4 is cylindrical structures.Sack cleaner 4 is arranged between raw gas pipeline 1 and the purified gas pipeline 6, and sack cleaner 4 bottom inlet mouths are connected with raw gas pipeline 1, and sack cleaner 4 tops are connected with purified gas pipeline 6;
Reducing valve group 5 is arranged between sack cleaner 4 and the gas holder, high-pressure side and the purified gas pipe connection that is connected sack cleaner 4, low pressure end and the purified gas pipe connection that is connected gas holder;
Diffusing chimney 7 is cylindrical structures.Diffuse chimney 7 bottom inlet mouths and be connected, diffuse chimney 7 top venting ports and be communicated with atmosphere with the raw gas pipeline 1 that is in sack cleaner 4 upstreams
Raw gas pipeline 1 is a cylindrical structure.Blast furnace, gravitational precipitator 2, coal gas dehydrating unit 3, sack cleaner 4, diffuse each equipment such as chimney 7 and connect by raw gas pipeline 1.
Purified gas pipeline 6 is cylindrical structures.Sack cleaner 4 is connected by purified gas pipeline 6 with gas holder with reducing valve group 5, reducing valve group 5.
Blast furnace gas dry dusting novel process workflow of the present invention is as follows:
1. work as blast furnace raw gas temperature in normal range, the blast furnace raw gas enters gravitational precipitator 2 by raw gas pipeline 1 and carries out thick dedusting, enter sack cleaner 4 dedustings by raw gas pipeline 1 then, enter 5 decompressions of reducing valve group through the purified gas after the dedusting by purified gas pipeline 6, send into gas holder by purified gas pipeline 6 at last.
2. it is low excessively to work as blast furnace raw gas temperature, and the blast furnace raw gas enters gravitational precipitator 2 by raw gas pipeline 1 and carries out thick dedusting, enters coal gas dehydrating unit 3 by raw gas pipeline 1 bypass then.In coal gas dehydrating unit 3, raw gas at first by inlet pipe 3-1, enters the multiplexer channel that is surrounded by division plate 3-4 respectively then.Dehumidifying layer (containing moisture adsorbent) 3-3 in passage carries out dehumidification treatments to raw gas, and the raw gas temperature raises in the time of dehumidifying.Raw gas after dehumidifying heats up is discharged coal gas dehydrating unit 3 via escape pipe 3-5, enter sack cleaner 4 dedustings by raw gas pipeline 1 then, enter 5 decompressions of reducing valve group through the purified gas after the dedusting by purified gas pipeline 6, send into gas holder by purified gas pipeline 6 at last.The present invention can adopt and regularly moisture adsorbent be regenerated or detect the humidity of coal gas dehydrating unit 3 air outlets by humidity sensor, is regenerating in certain humidity range, even the regeneration passage is opened.
3. break down when blast furnace or dust-removal system, the blast furnace raw gas enters gravitational precipitator 2 by raw gas pipeline 1, directly sends into by raw gas pipeline 1 then and diffuses chimney 7 and discharge.
4. when the moisture adsorbent in the coal gas dehydrating unit need be regenerated, about 200 ± 40 ℃ blast furnace raw gas are entered gravitational precipitator 2 by raw gas pipeline 1 carry out thick dedusting, enter coal gas dehydrating unit 3 by raw gas pipeline 1 bypass then.In coal gas dehydrating unit 3, raw gas at first by inlet pipe 3-1, enters the multiplexer channel that is surrounded by division plate 3-4 respectively then.Raw gas carries out thermal regeneration to the moisture adsorbent in the dehumidifying layer 3-3 in passage, and the raw gas temperature of coal gas dehydrating unit 3 is discharged in control via escape pipe 3-5, raw gas enters sack cleaner 4 dedustings by raw gas pipeline 1 then, enter 5 decompressions of reducing valve group through the purified gas after the dedusting by purified gas pipeline 6, send into gas holder by purified gas pipeline 6 at last.Stop in the time of can adopting regularly dehumidifying or the humidity by the outlet of humidity sensor measurement coal gas dehydrating unit to be lower than certain humidity.Will regularly carry out deashing to dust-removal system equipment, the flue dust behind the deashing will regularly be discharged.Certainly, those skilled in the art in the present technique field will be appreciated that, the foregoing description only is to be used for illustrating the present invention, and be not as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claim of the present invention conversion, the modification of the foregoing description.
Claims (10)
1. blast furnace gas dry dusting method, it is characterized in that gravitational precipitator in the blast furnace gas dry dusting system (2) is provided with coal gas dehydrating unit (3) in parallel afterwards, and it is arranged on the sack cleaner front, as an integral part of blast furnace gas dry dusting system, the gravitational precipitator outlet is provided with temperature sensor; When system outlet is blast furnace generation low temperature raw gas, usually psychromatic ratio is higher, before sack cleaner carries out dedusting, coal gas dehydrating unit from the coal gas of gravitational precipitator outlet from parallel connection carries out dehumidification treatments by the coal gas dehydrating unit to the low temperature raw gas earlier, enters the sack cleaner dedusting after removing the moisture in the raw gas;
When blast furnace raw gas temperature in normal range, the blast furnace raw gas enters gravitational precipitator (2) by raw gas pipeline (1) and carries out thick dedusting, then by directly entering sack cleaner (4) dedusting, enter reducing valve group (5) decompression through the purified gas after the dedusting by purified gas pipeline (6), send into gas holder by purified gas pipeline (6) at last.
2, blast furnace gas dry dusting method according to claim 1, the moisture adsorbent in the coal gas dehydrating unit it is characterized in that when need be regenerated, 200 ± 40 ℃ blast furnace raw gas are entered gravitational precipitator (2) by raw gas pipeline (1) carry out thick dedusting, enter coal gas dehydrating unit (3) dehumidifying by raw gas pipeline (1) bypass then.
3, blast furnace gas dry dusting method according to claim 1, it is characterized in that raw gas passes through inlet pipe (3-1), enter the coal gas dehydrating unit then respectively, the multiplexer channel that the coal gas dehydrating unit is surrounded by division plate (3-4), in every paths, be equipped with in the raw gas dehumidifying moisture adsorbent layer (3-3), dehumidify or thermal regeneration by moisture adsorbent.
4, blast furnace gas dry dusting device is characterized in that comprising that housing (3-2), inlet pipe (3-1), dehumidifying layer (3-3), division plate (3-4), escape pipe (3-5) constitute; And the intravital dehumidifying layer of shell is multilayer dehumidifying layer, between each dehumidifying layer the coal gas division plate is set, and makes coal gas be divided into several roads respectively by each dehumidifying floor; Inlet pipe (3-1), escape pipe (3-5) are located on the housing.
5, coal gas dehydrating unit according to claim 4 is characterized in that described housing is a cylindrical structure.
6, coal gas dehydrating unit according to claim 4, (3-3) end of layer of it is characterized in that dehumidifying is connected with inlet pipe (3-1), division plate (3-4) lower side, and layer (3-3) the other end that dehumidify is connected with division plate (3-4) upside, escape pipe (3-5) respectively; Dehumidifying layer (3-3) two avris also are connected with housing (3-2).
7, coal gas dehydrating unit according to claim 4 is characterized in that the dehumidifying layer adopts moisture adsorbent.
8, coal gas dehydrating unit according to claim 4 is characterized in that dehumidifying layer horizontal positioned, places on the reticular lamina.
9, coal gas dehydrating unit according to claim 4 is characterized in that the moisture adsorbent of moisture adsorbent layer adopts calcium chloride, silica gel or calcium oxide inorganic materials.
10, blast furnace gas dry dusting method according to claim 1 is characterized in that regularly moisture adsorbent being regenerated or regenerating by the humidity of humidity sensor detection coal gas dehydrating unit air outlet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102362139A CN101476007B (en) | 2008-11-18 | 2008-11-18 | Dry dust collection method and apparatus for blast furnace gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102362139A CN101476007B (en) | 2008-11-18 | 2008-11-18 | Dry dust collection method and apparatus for blast furnace gas |
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| CN101476007A true CN101476007A (en) | 2009-07-08 |
| CN101476007B CN101476007B (en) | 2012-12-05 |
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| CN2008102362139A Active CN101476007B (en) | 2008-11-18 | 2008-11-18 | Dry dust collection method and apparatus for blast furnace gas |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888477A (en) * | 2012-09-28 | 2013-01-23 | 中冶南方工程技术有限公司 | Top even pressure gas recovery device and technology for blast furnace and technology |
| CN105256091A (en) * | 2015-10-30 | 2016-01-20 | 太仓东能环保设备有限公司 | Dry dedusting technology for blast furnace gas |
| CN106178727A (en) * | 2016-08-29 | 2016-12-07 | 合肥合意环保科技工程有限公司 | A kind of air box impulse bag-type cleaner |
| CN106178791A (en) * | 2016-08-29 | 2016-12-07 | 合肥合意环保科技工程有限公司 | A kind of dust removing device for refuse incineration |
| CN106215556A (en) * | 2016-08-29 | 2016-12-14 | 合肥合意环保科技工程有限公司 | A kind of shaft kiln glass cleaner |
| CN106215557A (en) * | 2016-08-29 | 2016-12-14 | 合肥合意环保科技工程有限公司 | A kind of dehydrator frosting resistance glass fiber bag type cleaner |
| CN106215558A (en) * | 2016-08-29 | 2016-12-14 | 合肥合意环保科技工程有限公司 | A kind of sack cleaner with air cleaner |
| CN106215559A (en) * | 2016-08-29 | 2016-12-14 | 合肥合意环保科技工程有限公司 | A kind of long bag and low pulse bag-type dust collecting equipment |
| CN106268136A (en) * | 2016-08-29 | 2017-01-04 | 合肥合意环保科技工程有限公司 | A kind of unit pulse bag-type dust-removing device |
| CN106268076A (en) * | 2016-08-29 | 2017-01-04 | 合肥合意环保科技工程有限公司 | A kind of Novel pulse exhaust dust device with bag |
| CN106268135A (en) * | 2016-08-29 | 2017-01-04 | 合肥合意环保科技工程有限公司 | One faces formula pulse bag-type dust-removing device directly |
| CN106390622A (en) * | 2016-08-29 | 2017-02-15 | 合肥合意环保科技工程有限公司 | Electrical charge bag-type dust remover |
| CN107670418A (en) * | 2017-11-17 | 2018-02-09 | 合肥合意环保机电装备制造有限公司 | A kind of distribution exhaust dust device with bag certainly |
| CN107715660A (en) * | 2017-11-17 | 2018-02-23 | 合肥合意环保机电装备制造有限公司 | A kind of multi-functional just processing unit of dust arrester |
| CN109439827A (en) * | 2018-12-06 | 2019-03-08 | 东北大学 | A kind of blast furnace raw gas heats up dust pelletizing system online |
-
2008
- 2008-11-18 CN CN2008102362139A patent/CN101476007B/en active Active
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888477A (en) * | 2012-09-28 | 2013-01-23 | 中冶南方工程技术有限公司 | Top even pressure gas recovery device and technology for blast furnace and technology |
| CN105256091A (en) * | 2015-10-30 | 2016-01-20 | 太仓东能环保设备有限公司 | Dry dedusting technology for blast furnace gas |
| CN106178727A (en) * | 2016-08-29 | 2016-12-07 | 合肥合意环保科技工程有限公司 | A kind of air box impulse bag-type cleaner |
| CN106178791A (en) * | 2016-08-29 | 2016-12-07 | 合肥合意环保科技工程有限公司 | A kind of dust removing device for refuse incineration |
| CN106215556A (en) * | 2016-08-29 | 2016-12-14 | 合肥合意环保科技工程有限公司 | A kind of shaft kiln glass cleaner |
| CN106215557A (en) * | 2016-08-29 | 2016-12-14 | 合肥合意环保科技工程有限公司 | A kind of dehydrator frosting resistance glass fiber bag type cleaner |
| CN106215558A (en) * | 2016-08-29 | 2016-12-14 | 合肥合意环保科技工程有限公司 | A kind of sack cleaner with air cleaner |
| CN106215559A (en) * | 2016-08-29 | 2016-12-14 | 合肥合意环保科技工程有限公司 | A kind of long bag and low pulse bag-type dust collecting equipment |
| CN106268136A (en) * | 2016-08-29 | 2017-01-04 | 合肥合意环保科技工程有限公司 | A kind of unit pulse bag-type dust-removing device |
| CN106268076A (en) * | 2016-08-29 | 2017-01-04 | 合肥合意环保科技工程有限公司 | A kind of Novel pulse exhaust dust device with bag |
| CN106268135A (en) * | 2016-08-29 | 2017-01-04 | 合肥合意环保科技工程有限公司 | One faces formula pulse bag-type dust-removing device directly |
| CN106390622A (en) * | 2016-08-29 | 2017-02-15 | 合肥合意环保科技工程有限公司 | Electrical charge bag-type dust remover |
| CN107670418A (en) * | 2017-11-17 | 2018-02-09 | 合肥合意环保机电装备制造有限公司 | A kind of distribution exhaust dust device with bag certainly |
| CN107715660A (en) * | 2017-11-17 | 2018-02-23 | 合肥合意环保机电装备制造有限公司 | A kind of multi-functional just processing unit of dust arrester |
| CN109439827A (en) * | 2018-12-06 | 2019-03-08 | 东北大学 | A kind of blast furnace raw gas heats up dust pelletizing system online |
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| CN101476007B (en) | 2012-12-05 |
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