CN101492756A - Full dry purification and residual heat utilization equipment and method for converter gas - Google Patents

Full dry purification and residual heat utilization equipment and method for converter gas Download PDF

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Publication number
CN101492756A
CN101492756A CNA2009100249583A CN200910024958A CN101492756A CN 101492756 A CN101492756 A CN 101492756A CN A2009100249583 A CNA2009100249583 A CN A2009100249583A CN 200910024958 A CN200910024958 A CN 200910024958A CN 101492756 A CN101492756 A CN 101492756A
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CN
China
Prior art keywords
converter
gas
waste heat
heat boiler
combustion type
Prior art date
Application number
CNA2009100249583A
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Chinese (zh)
Inventor
袁长胜
谢泽民
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袁长胜
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Priority to CNA2009100249583A priority Critical patent/CN101492756A/en
Publication of CN101492756A publication Critical patent/CN101492756A/en

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The invention provides devices for purifying converter gas by dry process and using afterheat of the converter gas and a method thereof. In a converting period, waste gas exhausted from the converter is cooled by a movable gas hood and a vaporizing cooling duct, then is sent into a gravity dust collector to reduce dust content thereof, is conducted into a flue and then to an afterburning afterheat boiler; the afterburning afterheat boiler generates overheated vapor by using large quantity of sensible heat of the converter gas and sends the converter gas after being cooled into a bag dust collector through the flue to purify; the purified converter gas is sent to a draft fan to be pressurized through the flue, then passes through a three-way valve, and is sent to a converter gas cabinet; in a non-blowing period of the converter, converter gas is not generated; afterburning afterheat boiler burns a certain amount of blast furnace gas to stabilize load thereof and vapor yield. The three-way valve is switched to cause the afterheat boiler waster gas exhausted from the draft fan to flow to a waste gas discharging chimney. The converter gas processed by the method and devices has very low dust and moisture contents and is an ideal purified gas. During the operation process, large quantity of industrial water is saved, and large quantity of secondary energy is recycled.

Description

Method that coal gas of converter is absolutely dry purifies and the UTILIZATION OF VESIDUAL HEAT IN Apparatus and method for

Technical field

The present invention relates to the converter coal gas purification field, particularly relate to the absolutely dry method of a kind of coal gas of converter and purify and the UTILIZATION OF VESIDUAL HEAT IN Apparatus and method for.

Technical background

Be generally blowing period 12~18 minutes, smelting cycle is 28~38 minutes.Converter produces about 1600 ℃ the high raw gas of dustiness in the blowing process, and tolerance is very big, contains a large amount of available sensible heats.Up to the present, generally adopt gasification cooling flue earlier the high temperature raw gas to be cooled to about 900 ℃, adopt the purifying method of equipment water jetting cooler or atomizing refrigerating unit and electrostatic precipitator then.Consequent coal gas of converter water content is bigger, and more difficult controlling moisture content, will influence the dust removing effects of electrostatic precipitator when it changes than resistance, makes the final dustiness severe overweight of coal gas of converter (not reach 10mg/Nm at all 3).Electrostatic precipitator is blown out the danger of (blast) in addition in good time under this operating mode.And the coal gas of converter about 900 ℃ contains a large amount of available sensible heats, and the water coolant that is sprayed is taken away entirely, has wasted a large amount of secondary energy, has also consumed the process water of a large amount of preciousnesses thus.Therefore how to adopt the totally-drying purifying method, particularly adopt the higher sack cleaner of efficiency of dust collection to adapt to the periodically interrupted compensation combustion type waste heat boiler that changes of exhaust gas volumn and produce steam for producing or generating is our problem anxious to be solved to recycle converter gas sensible heat to obtain the ideal purified gas and to adopt.

Summary of the invention

Goal of the invention: provide a kind of employing gravitational precipitator, compensation combustion type waste heat boiler and sack cleaner with realization coal gas of converter real all dry-type dedusting to purify and UTILIZATION OF VESIDUAL HEAT IN Apparatus and method at the drawback that exists in the method that high temperature converter raw gas purifies at present both at home and abroad, and obtained to utilize converter gas sensible heat to produce the energy-saving effect of steam thus for production or generating.

Technical scheme: the Apparatus and method for that the invention provides absolutely dry method purification of a kind of coal gas of converter and UTILIZATION OF VESIDUAL HEAT IN, this equipment comprises: converter, movable gas hood, gasification cooling flue, gravitational precipitator, compensation combustion type waste heat boiler, sack cleaner and converter gas cabinet, converter is connected to gravitational precipitator by movable gas hood and gasification cooling flue, gravitational precipitator is connected to the compensation combustion type waste heat boiler by flue, the compensation combustion type waste heat boiler is connected with sack cleaner by flue, and sack cleaner arrives converter gas cabinet through pipe connection.

Preferably, the equipment of method that described coal gas of converter is absolutely dry purification and UTILIZATION OF VESIDUAL HEAT IN is connected to induced draft fan between sack cleaner and the converter gas cabinet.On the passage between induced draft fan and the converter gas cabinet T-valve is installed, the other end of T-valve is connected to waste gas and diffuses chimney.

The smelting cycle of converter is 28~38 minutes, only the blowing process (12~18 minutes) just outflow temperature up to 1400 ℃~1800 ℃ the high raw gas of dustiness.Traditional waste heat boiler is difficult to adapt to such high-temperature gas, so in the present invention program, still kept gasification cooling flue, make raw gas be cooled to 800 ℃~1000 ℃, the raw gas that gasification cooling flue is discharged enters gravitational precipitator, makes its dustiness reach 10~20g/Nm 3, import the compensation combustion type waste heat boiler by flue then, because the converter raw gas periodically changes, traditional waste heat boiler is not applicable to this operating mode; And waste heat boiler is not use any fuel.In order to utilize the interrupted converter gas sensible heat that changes that cuts in and out, the present invention has adopted the waste heat boiler of specific meanings---the compensation combustion type waste heat boiler, the compensation combustion type waste heat boiler is provided with the extended furnace, use low-calorie blast furnace gas, the blast furnace gas quantity combusted is along with the operating mode that cuts in and out of converter raw gas generating capacity is carried out reverse adjusting, the corresponding adjusting blast furnace gas of burner quantity combusted guarantees that the comprehensive thermal load of waste heat boiler is relative with steam production steady, the coal gas of converter temperature that the compensation combustion type waste heat boiler is discharged can be guaranteed at 160 ℃~200 ℃, send into sack cleaner by flue again and carry out final purification, make coal gas of converter become the very low (10mg/Nm of dustiness 3About), the few ideal purified gas of water content, purified converter gas is again through giving gas storage holder and user by pipe-line transportation after the induced draft fan supercharging.The coal gas of converter outlet temperature also has about 80 ℃~120 ℃, and this has effect greatly to improving the coal gas of converter theoretical combustion temperature.In the converter coal gas purification process, do not consume a process water, for the country of our lack of water how meaning is arranged, self-evident, water content is few in the producer gas, to improving the coal gas of converter theoretical combustion temperature help is arranged also.And, can realize utilizing the sensible heat of 900 ℃ to 180 ℃ of coal gas of converter to produce the superheated vapour of continous-stable for the energy-saving effect of producing or generating electricity by the quantity combusted that the compensation combustion type waste heat boiler is regulated blast furnace gas.Adopt this invention to produce 2.5MPa by the compensation combustion type waste heat boiler, the superheated vapour of parameter is for producing or the generating use more than 400 ℃.

Beneficial effect: converter gas processed dust-laden of the present invention is few, moisture few, becomes the ideal purified gas, and has eliminated potential safety hazard in the operating process, has saved a large amount of process waters, has reclaimed a large amount of secondary energy, produces the superheated vapour of continous-stable.

Description of drawings

Accompanying drawing is depicted as flowage structure synoptic diagram of the present invention.

Embodiment:

As shown in drawings, about 1600 ℃ the raw gas of discharging in blowing process converter 1 is cooled to about 900 ℃ by movable gas hood 2 and gasification cooling flue 3, sends into gravitational precipitator 4 and makes its dustiness reduce to 10~20g/Nm 3, import compensation combustion type waste heat boiler 5 by flue then.This compensation combustion type waste heat boiler 5 is made up of blast furnace gas combustion chamber, radiation formula heating surface and convection heating surface, each two cover multi-nozzle whirlwind-type blast furnace gas burner is arranged in both sides, blast furnace gas combustion chamber, the reverse adjusting of the blast furnace gas quantity combusted of compensation combustion type waste heat boiler 5 burners along with the coal gas of converter flow size that is admitted to waste heat boiler, in blowing period, coal gas of converter generating capacity maximum, compensation combustion type waste heat boiler 5 burner blast furnace gas quantity combusted minimums; Between the non-blowing process of converter, the coal gas of converter generating capacity is zero, and compensation combustion type waste heat boiler blast furnace gas quantity combusted is maximum.By the adjusting of compensation combustion type waste heat boiler 5 burner blast furnace gas quantity combusteds, guarantee that compensation combustion type waste heat boiler 5 thermal loads are steady relatively thus.Injecting compensation combustion type waste heat boiler 5 is de-mineralized water, and the superheated vapour output of producing is also relatively stable, can be for producing or the generating use.The coal gas of converter temperature that compensation combustion type waste heat boiler 6 is discharged is sent into sack cleaner 6 through flue then and is carried out final purification about 180 ℃.Make the coal gas of converter dustiness reach 10mg/Nm 3About.Coal gas of converter after being cleaned is after pipeline is sent into induced draft fan 7 superchargings, and flow through pipeline and T-valve 8 are given converter gas cabinet 9.

At output coal gas of converter not of non-blowing process of converter, compensation combustion type waste heat boiler 5 burning blast furnace gas flows and the exhausted air quantity that is produced thereof reach maximum value, this exhaust flow is through sack cleaner 6, after pipeline is sent into induced draft fan 7 superchargings, diffuse chimney 10 through pipeline and T-valve 8 changing flow direction waste gas again and be discharged into atmosphere.Guarantee that thus compensation combustion type waste heat boiler of non-blowing process of the converter 5 burning waste gas that blast furnace gas produced can not enter converter gas cabinet 9, thereby guarantee that coal gas of converter has the calorific value of higher stable.

Claims (4)

1, method that a kind of coal gas of converter is absolutely dry purifies and UTILIZATION OF VESIDUAL HEAT IN equipment, comprise converter (1), movable gas hood (2), gasification cooling flue (3) and converter gas cabinet (9), it is characterized in that this equipment also comprises: gravitational precipitator (4), compensation combustion type waste heat boiler (5) and sack cleaner (6), converter (1) is connected to gravitational precipitator (4) by movable gas hood (2) and gasification cooling flue (3), gravitational precipitator (4) is connected to compensation combustion type waste heat boiler (5) by flue, compensation combustion type waste heat boiler (5) is connected with sack cleaner (6) by flue, and sack cleaner (6) arrives converter gas cabinet (9) through pipe connection.
2, the absolutely dry method of coal gas of converter according to claim 1 purifies and UTILIZATION OF VESIDUAL HEAT IN equipment, it is characterized in that being connected to induced draft fan (7) between sack cleaner (6) and the converter gas cabinet (9).
3, the absolutely dry method of coal gas of converter according to claim 2 purifies and UTILIZATION OF VESIDUAL HEAT IN equipment, it is characterized in that on the passage between induced draft fan (7) and the converter gas cabinet (9) T-valve (8) being installed, and the other end of T-valve is connected to waste gas and diffuses chimney (10).
4, realize that the absolutely dry method of the described coal gas of converter of claim 1 purifies and the method for UTILIZATION OF VESIDUAL HEAT IN equipment clean and UTILIZATION OF VESIDUAL HEAT IN, it is characterized in that this method may further comprise the steps:
A) in blowing period, the raw gas that converter (1) is discharged enters gasification cooling flue (3) by movable gas hood (2) and cools off;
B) send into gravitational precipitator (4) through the cooled coal gas of converter of step a and carry out dedusting;
C) import compensation combustion type waste heat boiler (5) through step b converter gas processed by flue, the de-mineralized water that compensation combustion type waste heat boiler (5) utilizes converter gas sensible heat will inject compensation combustion type waste heat boiler (5) is heated to be superheated vapour; The reverse adjusting of the blast furnace gas quantity combusted of compensation combustion type waste heat boiler (5) burner along with the coal gas of converter flow size that is admitted to waste heat boiler;
D) coal gas after step c handles is sent into sack cleaner (6) through flue and is carried out final purification, and the coal gas after the purification is given converter gas cabinet (9) by the pipeline T-valve (8) of flowing through after pipeline is sent into induced draft fan (7) supercharging, finish;
E), in the non-blowing process of converter, converter (1) is the output coal gas of converter not, compensation combustion type waste heat boiler (5) burning blast furnace gas flow and the exhausted air quantity that is produced thereof reach maximum value, the exhaust flow that compensation combustion type waste heat boiler (5) is discharged T-valve (8) reversed flow of flowing through through sack cleaner (6), after induced draft fan (7) supercharging diffuses chimney (10) to waste gas, finishes.
CNA2009100249583A 2009-03-03 2009-03-03 Full dry purification and residual heat utilization equipment and method for converter gas CN101492756A (en)

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Application Number Priority Date Filing Date Title
CNA2009100249583A CN101492756A (en) 2009-03-03 2009-03-03 Full dry purification and residual heat utilization equipment and method for converter gas

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101619376B (en) * 2009-07-31 2011-01-12 清华大学 System for recovering converter gas sensible heat
CN102021264A (en) * 2010-12-03 2011-04-20 宁波大学 Dust-removal and waste heat recovery system of steelmaking converter gas and recovery method of dust-removal and waste heat recovery system
CN101781695B (en) * 2010-01-21 2011-06-15 江苏百斯特环境工程有限公司 System for integrated recovery and utilization of afterheat of converter gas
CN101736117B (en) * 2009-12-17 2011-09-28 宝钢工程技术集团有限公司 Converter fume high-temperature bag dust removal and recycling and secondary steam recycling system
CN102676734A (en) * 2012-06-08 2012-09-19 中冶赛迪工程技术股份有限公司 Converter gas waste heat recovery device and method
CN102676729A (en) * 2012-06-05 2012-09-19 中冶华天南京工程技术有限公司 Dry-process dust removing system based on recycling of converter smoke heat pipe waste heat and dust removal of filter bag
CN102827993A (en) * 2011-06-17 2012-12-19 山东省冶金设计院股份有限公司 Fuel gas injection type recovery method of sensible heat of convertor coal gas and convertor flue gas
CN102827991A (en) * 2011-06-17 2012-12-19 山东省冶金设计院股份有限公司 Convertor coal gas recovery method
CN102827992A (en) * 2011-06-17 2012-12-19 山东省冶金设计院股份有限公司 Converter flue gas energy recovery method
CN103849705A (en) * 2014-03-04 2014-06-11 中钢集团天澄环保科技股份有限公司 Waste heat recycling and fine particle purifying system and method of converter gas
CN105318342A (en) * 2014-06-11 2016-02-10 中国石油化工股份有限公司 Process for treating industrial exhaust gas
CN105400965A (en) * 2015-11-18 2016-03-16 铜陵有色设计研究院 Flue gas collecting device for copper smelting of converter process
CN106497611A (en) * 2016-11-16 2017-03-15 攀枝花攀钢集团设计研究院有限公司 Blast furnace slag puies forward titanium carbide furnace high temperature raw coke oven gas cleaning system
CN106906331A (en) * 2017-03-30 2017-06-30 河北华奥节能科技有限公司 A kind of dry-method dust-removal device and method for reclaiming converter gas waste heat
CN107024861A (en) * 2016-02-01 2017-08-08 上海梅山钢铁股份有限公司 A kind of line modeling method of converter dry dust pelletizing system

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101619376B (en) * 2009-07-31 2011-01-12 清华大学 System for recovering converter gas sensible heat
CN101736117B (en) * 2009-12-17 2011-09-28 宝钢工程技术集团有限公司 Converter fume high-temperature bag dust removal and recycling and secondary steam recycling system
CN101781695B (en) * 2010-01-21 2011-06-15 江苏百斯特环境工程有限公司 System for integrated recovery and utilization of afterheat of converter gas
CN102021264B (en) * 2010-12-03 2012-11-28 宁波大学 Dust-removal and waste heat recovery system of steelmaking converter gas and recovery method of dust-removal
CN102021264A (en) * 2010-12-03 2011-04-20 宁波大学 Dust-removal and waste heat recovery system of steelmaking converter gas and recovery method of dust-removal and waste heat recovery system
CN102827993B (en) * 2011-06-17 2016-02-24 山东省冶金设计院股份有限公司 Inject the recovery method of combustion type coal gas of converter and converter gas sensible heat
CN102827993A (en) * 2011-06-17 2012-12-19 山东省冶金设计院股份有限公司 Fuel gas injection type recovery method of sensible heat of convertor coal gas and convertor flue gas
CN102827991A (en) * 2011-06-17 2012-12-19 山东省冶金设计院股份有限公司 Convertor coal gas recovery method
CN102827992A (en) * 2011-06-17 2012-12-19 山东省冶金设计院股份有限公司 Converter flue gas energy recovery method
CN102827991B (en) * 2011-06-17 2016-06-08 山东省冶金设计院股份有限公司 The recovery method of coal gas of converter
CN102676729A (en) * 2012-06-05 2012-09-19 中冶华天南京工程技术有限公司 Dry-process dust removing system based on recycling of converter smoke heat pipe waste heat and dust removal of filter bag
CN102676729B (en) * 2012-06-05 2014-01-15 中冶华天南京工程技术有限公司 Dry-process dust removing system based on recycling of converter smoke heat pipe waste heat and dust removal of filter bag
CN102676734A (en) * 2012-06-08 2012-09-19 中冶赛迪工程技术股份有限公司 Converter gas waste heat recovery device and method
CN103849705B (en) * 2014-03-04 2016-01-06 中钢集团天澄环保科技股份有限公司 RECOVERY OF CONVERTER GAS UTILIZATION OF VESIDUAL HEAT IN and minuteness particle purification system
CN103849705A (en) * 2014-03-04 2014-06-11 中钢集团天澄环保科技股份有限公司 Waste heat recycling and fine particle purifying system and method of converter gas
CN105318342A (en) * 2014-06-11 2016-02-10 中国石油化工股份有限公司 Process for treating industrial exhaust gas
CN105318342B (en) * 2014-06-11 2019-05-17 中国石油化工股份有限公司 A kind for the treatment of process of industrial smoke
CN105400965A (en) * 2015-11-18 2016-03-16 铜陵有色设计研究院 Flue gas collecting device for copper smelting of converter process
CN107024861A (en) * 2016-02-01 2017-08-08 上海梅山钢铁股份有限公司 A kind of line modeling method of converter dry dust pelletizing system
CN106497611A (en) * 2016-11-16 2017-03-15 攀枝花攀钢集团设计研究院有限公司 Blast furnace slag puies forward titanium carbide furnace high temperature raw coke oven gas cleaning system
CN106906331A (en) * 2017-03-30 2017-06-30 河北华奥节能科技有限公司 A kind of dry-method dust-removal device and method for reclaiming converter gas waste heat

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Open date: 20090729