CN101613777B - Process for backblowing and deashing through bag-type dust remover by blast furnace dry method - Google Patents
Process for backblowing and deashing through bag-type dust remover by blast furnace dry method Download PDFInfo
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- CN101613777B CN101613777B CN200910160615XA CN200910160615A CN101613777B CN 101613777 B CN101613777 B CN 101613777B CN 200910160615X A CN200910160615X A CN 200910160615XA CN 200910160615 A CN200910160615 A CN 200910160615A CN 101613777 B CN101613777 B CN 101613777B
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Abstract
The invention relates to a process for backblowing and deashing through a bag-type dust remover by a blast furnace dry method. The pure blast furnace gas after the dust removal by the bag-type dust remover is used as a gas source to perform backblowing on the bag-type dust remover; and before the backblowing, the pure blast furnace gas after the dust removal by the bag-type dust remover is further deashed by a filter, and then is subjected to steps of temperature reduction, pressurization, dehydration and pressure regulation to meet the requirement of gas required by the bag body backblowing and deashing. The dust removal method of the process reduces requirements on nitrogen in the bag-type dust removal technology, and avoids the problem of bag backblowing caused by unstable pressure and insufficient supply of nitrogen. The process has pollution-free operation, applies temperature swing adsorption, saves energy, reduces emission, simultaneously reduces the consumption of the nitrogen, safely and effectively reduces the cost of a blast furnace gas bag in the operation, and can be mainly applied to the bag-type dust removal of the gas of a large-sized 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 iron and steel enterprise's each item work 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: the clear height producer gas that utilizes water cooler will pass through after the dedusting is cooled to below 40 ℃;
C. pressurization steps: utilize gas compressor will pass through cooled clear height producer gas and pressurize;
D. dehydrating step: the clear height producer gas that utilizes gas dewatering device will pass through after the pressurization dewaters;
E. pressure regulation step: the pressure that utilizes the relief valve group will pass through the clear height producer gas after the dehydration is regulated, and the pulse valve of sack cleaner is to the requirement of desired gas pressure when to satisfy sack cleaner being carried out blowback.Said 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 operate alternately, the sorbent material that uses can be white lake 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 cut 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
Gas dewatering device 5 relief valve groups 6
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.The clear height producer gas of being seen off by bag-type dust after cooling, pressurization, dehydration, pressure regulation, carries out blowback as source of the gas to bf bag filter again through the further ash disposal of strainer.
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: because the temperature of the clear height producer gas of bag-type dust outlet is approximately 150 ℃～200 ℃, the clear height producer gas that therefore need utilize water cooler 2 will pass through after the dedusting is cooled to below 40 ℃, to satisfy the requirement of pulse valve;
C. pressurization steps: utilize gas compressor 3 will pass through cooled clear height producer gas and pressurize, 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, the clear height producer gas that need utilize gas dewatering device 5 will pass through after the pressurization dewaters.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 like white lake, molecular sieve.With the water cut in the coal gas by 0.05Kg/Nm
3Reduce to 0.001Kg/Nm
3Below;
E. pressure regulation step: the pressure that utilizes relief valve group 6 will pass through the clear height producer gas after the dehydration is regulated, and the pulse valve of bf bag filter is to the requirement of desired gas pressure when to satisfy sack cleaner being carried out blowback.Said pulse valve requires to be 0.35Mpa～0.45Mpa to desired gas pressure.
Clear height producer gas through after the above-mentioned steps processing can replace nitrogen that cloth bag is carried out blowback and deashing, thereby has reduced the demand to nitrogen, and energy-saving and emission-reduction have reduced running cost.
The above is merely preferred embodiments of the present invention, is not 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 embodiment of the present invention swimmingly; But, allly be familiar with the professional and technical personnel, in not breaking away from technical scheme scope of the present invention; The technology contents that is disclosed more than utilizing, and the equivalent variations of a little change of making, modification and differentiation is equivalent embodiment of the present invention; All foundations essence technology of the present invention all still belongs in the technical scheme scope of the present invention change, modification and the differentiation etc. of any equivalent variations that above embodiment did simultaneously.
Claims (2)
1. the technology of blast furnace dry method sack cleaner blowback and deashing is characterized in that, 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, carries out the following step and handles:
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, utilize the coal gas surge tank that the clear height producer gas is cushioned again;
D. dehydrating step: the clear height producer gas after utilizing gas dewatering device to pressurize dewaters, and water cut is reduced to 0.001Kg/Nm
3Below; Wherein, utilize the mode of double tower absorption to dewater, dehydration and adsorbent reactivation operate alternately, the sorbent material that uses among the said dehydrating step d is white lake or molecular sieve;
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 said 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 is characterized in that, boost in pressure is extremely greater than 0.6MPa behind the clear height producer gas process pressurization steps c.
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| 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 |
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|---|---|---|---|
| CN200910160615XA CN101613777B (en) | 2009-07-17 | 2009-07-17 | Process for backblowing and deashing through bag-type dust remover by blast furnace dry method |
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| CN101613777A CN101613777A (en) | 2009-12-30 |
| CN101613777B true CN101613777B (en) | 2012-01-04 |
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Cited By (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 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942535B (en) * | 2010-09-20 | 2012-01-25 | 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 |
| 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 |
Citations (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 |
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2009
- 2009-07-17 CN CN200910160615XA patent/CN101613777B/en active Active
Patent Citations (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 |
Cited By (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 |
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| CN101613777A (en) | 2009-12-30 |
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