CN101613777A - The technology of blowback of a kind of blast furnace dry method bag-type dust and deashing - Google Patents
The technology of blowback of a kind of blast furnace dry method bag-type dust and deashing Download PDFInfo
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- CN101613777A CN101613777A CN200910160615A CN200910160615A CN101613777A CN 101613777 A CN101613777 A CN 101613777A CN 200910160615 A CN200910160615 A CN 200910160615A CN 200910160615 A CN200910160615 A CN 200910160615A CN 101613777 A CN101613777 A CN 101613777A
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- Prior art keywords
- gas
- blowback
- clear height
- sack cleaner
- technology
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- 238000005516 engineering process Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000428 dust Substances 0.000 title claims abstract description 20
- 239000003034 coal gas Substances 0.000 claims abstract description 7
- 230000018044 dehydration Effects 0.000 claims abstract description 7
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 7
- 238000010521 absorption reaction Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 4
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 3
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 3
- 239000002808 molecular sieve Substances 0.000 claims description 3
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 3
- 239000002594 sorbent Substances 0.000 claims description 3
- 239000003463 adsorbent Substances 0.000 claims description 2
- 230000007420 reactivation Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 55
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 32
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 16
- 239000004744 fabric Substances 0.000 abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002956 ash Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The present invention relates to the technology of blowback of a kind of blast furnace dry method sack cleaner and deashing, it utilizes the clear height producer gas after the sack cleaner dedusting as source of the gas sack cleaner to be carried out blowback, before the blowback, clear height producer gas behind bag-type dust carries out further ash disposal by strainer earlier, after passing through cooling, pressurization, dehydration, pressure regulation step again, reach the requirement of blowback of cloth bag body and deashing desired gas.The method for dust removal of this technology has lowered in the dust settling pocket technique the requirement of nitrogen, avoids the unstable and under-supply cloth bag blowback problem that causes owing to nitrogen pressure.The operation of this technology is pollution-free, the method for utilization alternating temperature absorption, and energy-saving and emission-reduction have reduced the consumption of nitrogen simultaneously, have reduced the cost that bag filter of blast furnace gases is in operation safely and effectively, can be mainly used in the coal gas bag-type dust of large blast furnace.
Description
Technical field
The present invention relates to metallurgical technology field, relate in particular in a kind of dry-method bag-type dust collecting device blowback in metallurgy industry large blast furnace coal gas dust removal field and the technology of deashing.
Background technology
Build a conservation-minded society, save energy is a fundamental state policy of China, also is the strategy and policy that Iron And Steel Industry realizes Sustainable development.Therefore, low-cost and high benefit becomes the most important thing of the every work of iron and steel enterprise day by day, and energy-saving and emission-reduction, developing a circular economy becomes the main flow of development of iron and steel enterprises.For achieving the above object, many iron and steel enterprises begin progressively to eliminate the small blast furnace of high energy consumption, high added value, begin to quicken to extend the technological transformation project with newly-built large blast furnace simultaneously, the supporting dedusting of blast furnace gas facility that thereupon brings also mainly adopts the dry bag-type dedusting.At present, to sack cleaner carry out blowback and the required purge gas of deashing mainly adopt oxygen installation's sky dispense out in, low-pressure nitrogen.After nitrogen pipeline inserts,, regulate nitrogen pressure, according to production requirement the cloth bag casing is carried out blowback and pipeline deashing again according to the requirement of blowback with pulse valve and deashing pipeline.In above-mentioned method for dust removal, utilize nitrogen as the dust separating source of the gas of fly-ash separator, its weak point is, the nitrogen supply (NS) quantity not sufficient in many steel mills State of Blast Furnace district, pressure is stable inadequately, and the nitrogen cost is also higher.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method of utilizing clear height producer gas after the bf bag filter dedusting cloth bag body to be carried out blowback and deashing, this method can be alleviated the nitrogen supply (NS) quantity not sufficient in some steel mill State of Blast Furnace districts, the problem of pressure transient, reduces bag-type dust running cost simultaneously.
In order to solve the problems of the technologies described above, the invention provides a kind of technology of utilizing the clear height producer gas sack cleaner to be carried out blowback and deashing, this technology is carried out the following step and is handled before utilization is carried out blowback as source of the gas to sack cleaner by the clear height producer gas after the sack cleaner dedusting:
A. dust removal step utilizes gas filter drain cock to remove the residual dust of clear height producer gas;
B. cooling step: utilize water cooler to be cooled to through the clear height producer gas after the dedusting below 40 ℃;
C. pressurization steps: utilize gas compressor to pressurize through cooled clear height producer gas;
D. dehydrating step: utilize gas dewatering device to dewater through the clear height producer gas after the pressurization;
E. pressure regulation step: utilize the relief valve group to regulate through the pressure of the clear height producer gas after the dehydration, the pulse valve of sack cleaner is to the requirement of desired gas pressure when to satisfy sack cleaner being carried out blowback.Described pulse valve requires to be 0.35Mpa～0.45Mpa to desired gas pressure.
Preferably, after the clear height producer gas being carried out pressurization steps c processing, utilize the coal gas surge tank that the clear height producer gas is cushioned, and then carry out described dehydrating step d.
In dehydrating step, utilize the mode of double tower absorption to dewater, dehydration and adsorbent reactivation alternate operation, the sorbent material that uses can be aluminium hydroxide or molecular sieve.
Boost in pressure is to more than the 0.6Mpa behind the clear height producer gas process pressurization steps c, and to satisfy the needs of dehydrating step, behind dehydrating step d, water content is reduced to 0.001Kg/Nm
3Below.
The present invention utilizes the clear height producer gas that the technology that sack cleaner carries out blowback and deashing is had the following advantages:
(1) reduced demand, needn't use the nitrogen blowback during ordinary production nitrogen;
(2) energy-saving and emission-reduction have reduced running cost;
(3) reduced the input of nitrogen in the gas line, guaranteed that the calorific value of outlet blast furnace gas satisfies customer requirements.
Description of drawings
Fig. 1 is the synoptic diagram of this technology required equipment.
[primary clustering nomenclature]
Gas filter drain cock 1 water cooler 2
Gas compressor 3 surge tanks 4
Embodiment
The present invention utilizes the clear height producer gas after the bf bag filter dedusting to replace nitrogen that cloth bag is carried out blowback and deashing, before blowback, the clear height producer gas is carried out series of steps handle to satisfy the requirement to desired gas of pulse valve and deashing pipeline.For further setting forth content of the present invention and reaching technique means and the effect that predetermined goal of the invention is taked, be described with reference to the accompanying drawings as follows:
With reference to shown in Figure 1, the related equipment of this technology mainly comprises: gas filter drain cock 1, water cooler 2, gas compressor 3, surge tank 4, gas dewatering device 5 and relief valve group 6.By the further ash disposal of clear height producer gas process filter that bag-type dust is sent, after cooling, pressurization, dehydration, pressure regulation, bf bag filter is carried out blowback again as source of the gas.
Above-mentioned steps specifically comprises:
A. dust removal step utilizes gas filter drain cock 1 to remove the residual most of dust of clear height producer gas, generally will remove the requirement of the dust pulse valve when satisfying the cloth bag blowback more than 99%.Gas filter drain cock adopts the using and the reserved, can normally move to guarantee technology;
B. cooling step:, therefore need utilize water cooler 2 to be cooled to through the clear height producer gas after the dedusting below 40 ℃, to satisfy the requirement of pulse valve because the temperature of the clear height producer gas of bag-type dust outlet is approximately 150 ℃～200 ℃;
C. pressurization steps: utilize gas compressor 3 to pressurize through cooled clear height producer gas, because pulse valve requires gaseous tension higher when operation, the blast furnace gas after the purification must pressurize to meet the demands.Compressor adopts the using and the reserved, with gas pressure by being promoted to greater than 0.6Mpa less than 0.18Mpa.Compressor volume flow is 25m
3/ min.For guaranteeing the stable of gas pressure, behind compressor, increase coal gas surge tank 4;
D. dehydrating step: stop up for preventing pulse valve, need utilize gas dewatering device 5 to dewater through the clear height producer gas after pressurizeing.Utilization alternating temperature absorption principle in this technology, the mode that adopts double tower absorption is (in order to reach continuous operation, during an adsorption tower dehydration, another adsorption tower internal adsorption agent is regenerated), select suitable sorbent material,, reached the purpose of moisture in the continuous removal coal gas as aluminium hydroxide, molecular sieve.With the water content in the coal gas by 0.05Kg/Nm
3Reduce to 0.001Kg/Nm
3Below;
E. pressure regulation step: utilize relief valve group 6 to regulate through the pressure of the clear height producer gas after the dehydration, the pulse valve of bf bag filter is to the requirement of desired gas pressure when to satisfy sack cleaner being carried out blowback.Described pulse valve requires to be 0.35Mpa～0.45Mpa to desired gas pressure.
Can replace nitrogen that cloth bag is carried out blowback and deashing through the clear height producer gas after the above-mentioned steps processing, thereby reduce the demand to nitrogen, energy-saving and emission-reduction have reduced running cost.
The above, only be preferred embodiments of the present invention, be not that the present invention is done any pro forma restriction, all industry those of ordinary skill, but all shown in the by specification accompanying drawing and the above, and implement the present invention swimmingly, but, all those skilled in the art, in not breaking away from the technical solution of the present invention scope, the technology contents that is disclosed more than utilizing, and a little change of making, modify and the equivalent variations that develops, be equivalent embodiment of the present invention, all foundations essence technology of the present invention is to the change of any equivalent variations that above embodiment did simultaneously, modify and develop etc., all still belong in the technical scheme scope of the present invention.
Claims (6)
1. the technology of blast furnace dry method sack cleaner blowback and deashing is characterized in that, utilize described as source of the gas sack cleaner is carried out blowback by the clear height producer gas after the sack cleaner dedusting before, carry out the following step and handle:
A. dust removal step utilizes gas filter drain cock to remove the residual dust of clear height producer gas;
B. cooling step: the clear height producer gas after utilizing water cooler with dedusting is cooled to below 40 ℃;
C. pressurization steps: utilize gas compressor that cooled clear height producer gas is pressurizeed;
D. dehydrating step: the clear height producer gas after utilizing gas dewatering device to pressurize dewaters;
E. pressure regulation step: the pressure of the clear height producer gas after utilizing the relief valve group to dewater is regulated, the pulse valve of sack cleaner is to the requirement of desired gas pressure when to satisfy bf bag filter being carried out blowback, and described pulse valve requires to be 0.35Mpa～0.45Mpa to desired gas pressure.
2. the technology of blast furnace dry method sack cleaner as claimed in claim 1 blowback and deashing, it is characterized in that, after the clear height producer gas being carried out pressurization steps c processing, utilize the coal gas surge tank that the clear height producer gas is cushioned, and then carry out described dehydrating step d.
3. the technology of blast furnace dry method sack cleaner as claimed in claim 1 blowback and deashing is characterized in that, in dehydrating step d, utilizes the mode of double tower absorption to dewater dehydration and adsorbent reactivation alternate operation.
4. the technology of blast furnace dry method sack cleaner as claimed in claim 3 blowback and deashing is characterized in that, the sorbent material that uses among the dehydrating step d is aluminium hydroxide or molecular sieve.
5. the technology of blast furnace dry method sack cleaner as claimed in claim 1 blowback and deashing is characterized in that, water content is reduced to 0.001Kg/Nm behind the clear height producer gas process dehydrating step d
3Below.
6. the technology of blast furnace dry method sack cleaner as claimed in claim 1 blowback and deashing is characterized in that, boost in pressure is extremely greater than 0.6Mpa behind the clear height producer gas process pressurization steps c.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910160615XA CN101613777B (en) | 2009-07-17 | 2009-07-17 | Process for backblowing and deashing through bag-type dust remover by blast furnace dry method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910160615XA CN101613777B (en) | 2009-07-17 | 2009-07-17 | Process for backblowing and deashing through bag-type dust remover by blast furnace dry method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101613777A true CN101613777A (en) | 2009-12-30 |
| CN101613777B CN101613777B (en) | 2012-01-04 |
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|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942535A (en) * | 2010-09-20 | 2011-01-12 | 秦皇岛首秦金属材料有限公司 | Method for utilizing and recycling solid waste of cyclone ash by spraying through blast-furnace tuyere |
| CN109338023A (en) * | 2018-12-26 | 2019-02-15 | 山东钢铁股份有限公司 | A kind of furnace cloth bag dust-removing equipment |
| CN110205425A (en) * | 2019-03-29 | 2019-09-06 | 山东钢铁股份有限公司 | Blast furnace gas dry dusting cloth bag blowback system and back blowing process |
| CN116574857A (en) * | 2023-06-20 | 2023-08-11 | 华北理工大学智能仪器厂 | Blast furnace gas cloth bag dust collector |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481844A (en) * | 2014-11-14 | 2015-04-01 | 柳州市安龙机械设备有限公司 | Front-load cooler assembly |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1778970A (en) * | 2004-11-25 | 2006-05-31 | 首钢总公司 | Clean gas pressurized impulse reverse-blow pressure-stabilized air source device |
| CN1818079A (en) * | 2006-03-06 | 2006-08-16 | 崔树清 | Gas pressurizing and back-flushing apparatus and process for externally filtering dust collecting and distributing of blast furnace |
| CN101230410A (en) * | 2008-02-21 | 2008-07-30 | 上海泰山除尘设备有限公司 | Blast furnace gas impulse blowing purification dust removal system adapted for multiple volumes |
-
2009
- 2009-07-17 CN CN200910160615XA patent/CN101613777B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942535A (en) * | 2010-09-20 | 2011-01-12 | 秦皇岛首秦金属材料有限公司 | Method for utilizing and recycling solid waste of cyclone ash by spraying through blast-furnace tuyere |
| CN109338023A (en) * | 2018-12-26 | 2019-02-15 | 山东钢铁股份有限公司 | A kind of furnace cloth bag dust-removing equipment |
| CN110205425A (en) * | 2019-03-29 | 2019-09-06 | 山东钢铁股份有限公司 | Blast furnace gas dry dusting cloth bag blowback system and back blowing process |
| CN116574857A (en) * | 2023-06-20 | 2023-08-11 | 华北理工大学智能仪器厂 | Blast furnace gas cloth bag dust collector |
| CN116574857B (en) * | 2023-06-20 | 2024-02-02 | 华北理工大学智能仪器厂 | Blast furnace gas cloth bag dust collector |
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| Publication number | Publication date |
|---|---|
| CN101613777B (en) | 2012-01-04 |
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