CN103374641A - Converter gas cloth-bag dust-removing purification method based on energy recycling - Google Patents
Converter gas cloth-bag dust-removing purification method based on energy recycling Download PDFInfo
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- CN103374641A CN103374641A CN2012101201441A CN201210120144A CN103374641A CN 103374641 A CN103374641 A CN 103374641A CN 2012101201441 A CN2012101201441 A CN 2012101201441A CN 201210120144 A CN201210120144 A CN 201210120144A CN 103374641 A CN103374641 A CN 103374641A
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention provides a converter gas cloth-bag dust-removing purification method based on energy recycling. The temperature of dust-containing coal gas or smoke discharged from a converter is reduced to 900+/-20 DEG C through a water cooling flue; the temperature of the dust-containing coal gas or the smoke is reduced to be less than or equal to 200 DEG C from 900+/-20 DEG C in a residual heat boiler; steam generated by the residual heat boiler is supplied to a company pipe network or is used for generating power and is subjected to rough dust removing; gas which is subjected to the rough dust removing by the residual heat boiler enters a cloth bag dust remover; and the dust-containing concentration in the gas is reduced to be less than 10mg/Nm<3>. According to the converter gas cloth-bag dust-removing purification method disclosed by the invention, a wet-method dust-removing system and an LT-method spraying temperature-reducing tower of a previous converter are cancelled and residual heat released by reducing the temperature of the smoke from 900 DEG to 200 DEG C is recycled so that steam recycling amount of ton steel and coal gas recycling amount of the ton steel are improved, the energy source consumption of the ton steel is reduced, and energy conservation and water conservation in smelting of the converter are realized. A cloth bag dust collection mode which saves investment and has low operation level requirements is used for replacing electrostatic dust collection so that the converter gas cloth-bag dust-removing purification method is good for popularization.
Description
Technical field
The present invention relates to a kind of coal gas of converter bag-type dust purifying method based on energy recovery, belong to coal gas dust removal purifying method technical field.
Background technology
Existing converter coal gas purification is divided into two kinds of wet method and dry method, one, the problem of wet dedusting existence: the flue gas of (1) converter smelting phase is cooled to about 80 ℃ by spray scrubber after being down to 900 ℃ through gasification cooling flue, causes energy dissipation and consumes a large amount of water resourcess; (2) the systemic resistance loss is large, and up to about 20kPa, it is large that blower fan consumes electric energy, and running cost is high; (3) need establish huge water processing establishment the water of dedusting, dehydration equipment is processed, circulation pump power is large.Wet method is owing to power consumption is high, water loss causes greatly the high enterprise of enterprise's production cost to affect competitive power.Two, converter dry LT method existing problems: (1) although converter LT method has overcome the part shortcoming of wet method, before entering electrostatic precipitator, establish evaporative cooler with 900 ℃ flue gas by about spray cooling to 150 ℃, also cause energy dissipation; (2) its system complex, to equipment, instrument specification of quality height, (3) require high to management and operant level; (4) once investment is high.Dry method LT method requires tight and promotes limited the technological operation accuracy because investment is large, equipment operation maintenance requires highly.So the overwhelming majority of converter in the world adopts the wet dedusting techniques.
Summary of the invention
The objective of the invention is all to have the problem that wastes energy for the wet method and the dry method that solve existing converter coal gas purification use, and then a kind of coal gas of converter bag-type dust purifying method based on energy recovery is provided.
The objective of the invention is to be achieved through the following technical solutions:
A kind of coal gas of converter bag-type dust purifying method based on energy recovery, comprise: by converter 1400 ℃ of dust-laden coal gas or flue gas out, send into water-cooled flue by pipeline, cool to 900 ℃ ± 20 ℃ by converter dust-laden coal gas or flue gas out through water-cooled flue, the dust-laden coal gas or the flue gas that cool to 900 ℃ ± 20 ℃ enter waste heat boiler again, at the waste heat boiler place with dust-laden coal gas or flue gas by 900 ℃ ± 20 ℃ drop to≤200 ℃, the steam that waste heat boiler produces carries out thick dedusting simultaneously for company's pipe network or generating; Gas after the thick dedusting of described waste heat boiler enters the Gas Cleaning With Bag House device, and dust content in the described gas is down to 10mg/Nm
3Below, reach the coal-gas recovering condition after the dedusting, through blower fan, three-way switch valve, add that wet saturator is laggard to enter enterprise's coal-gas recovering pipe network and gas chamber for the user, do not reach recovering condition, pass through the blower fan afterfire and diffuse.
The invention has the beneficial effects as follows, wet method dedusting system that in the past converter joins and the mist cooling tower of LT method have been cancelled, reclaim flue gas and dropped to 200 ℃ of waste heats that discharge from 900 ℃, ton steel amount of steam withdrawn and ton steel coal-gas recovering amount have been improved, reduce the energy consumption of ton steel, realize energy-conservation, water saving in the converter smelting.Use reduced investment, the less demanding bag-type dust of operant level to replace electrostatic precipitation, be beneficial to popularization.
Embodiment
The below will the present invention is described in further detail: present embodiment is implemented under take technical solution of the present invention as prerequisite, has provided detailed embodiment, but protection scope of the present invention is not limited to following embodiment.
A kind of coal gas of converter bag-type dust purifying method based on energy recovery that present embodiment is related, comprise: by converter dust-laden coal gas or flue gas out, send into water-cooled flue by pipeline, cooled to about 900 ℃ through water-cooled flue by converter 1400 ℃ of dust-laden coal gas or flue gas out, the dust-laden coal gas or the flue gas that cool to about 900 ℃ enter waste heat boiler again, at described waste heat boiler place dust-laden coal gas or flue gas are dropped to about by 900 ℃≤200 ℃, and carry out simultaneously thick dedusting by described waste heat boiler recovered steam for company's pipe network or generating; Gas after the thick dedusting of described waste heat boiler enters the Gas Cleaning With Bag House device, and dust content in the described gas is down to 10mg/Nm
3Below after as when reaching the coal-gas recovering condition, then through blower fan, three-way switch valve, add that wet saturator is laggard to enter enterprise's coal-gas recovering pipe network and gas chamber etc. for the user; As when not reaching recovering condition, then afterfire is diffused through blower fan.Waste heat boiler, Gas Cleaning With Bag House device need adapt to converter and be interrupted the characteristics of smelting, avoid the flue gas mixed occurrence blast during smelting phase or reinforced, discharging, therefore, establish explosion trap at waste heat boiler and Gas Cleaning With Bag House device, can realize autoshutdown after the diaphragm explosion of explosion trap.
Described Gas Cleaning With Bag House device adopts cylinder type, and is provided with shut-off device at Gas Cleaning With Bag House device import and export.
Take 150 tons of converters as example, maximum exhaust gas volumn: the 11.2 * 104Nm3/h of converter gas plug for outlet; 1450 ℃ of flue gas maximum temperatures;
Water-cooled flue:
Manufacturer: by the boiler manufacturer production; Material: 20G or other;
Waste heat boiler: 75 tons of hour steam output; Smoke inlet flow: 11.2 * 104Nm3/h; 900 ℃ of smoke inlet temperature; Temperature out: 200 ℃; The manufacturer: by boiler producer according to the outside view production that provides;
Gas Cleaning With Bag House device (explosion-proof type): adopt a plurality of round tube type low pressure pulse bag filters; Filter bag heatproof: 200 ℃; Steel: Q235B; Filtration area 4500m2; Manufacturer: Foshan City three vane environmental protection plant engineering company limiteds.
The above; only be the better embodiment of the present invention; these embodiments all are based on the different implementations under the general idea of the present invention; and protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (2)
1. coal gas of converter bag-type dust purifying method based on energy recovery, it is characterized in that, comprise: by converter 1400 ℃ of dust-laden coal gas or flue gas out, send into water-cooled flue by pipeline, cool to 900 ℃ ± 20 ℃ by converter dust-laden coal gas or flue gas out through water-cooled flue, the dust-laden coal gas or the flue gas that cool to 900 ℃ ± 20 ℃ enter waste heat boiler again, at the waste heat boiler place with dust-laden coal gas or flue gas by 900 ℃ ± 20 ℃ drop to≤200 ℃, the steam that waste heat boiler produces carries out thick dedusting simultaneously for company's pipe network or generating; Gas after the thick dedusting of described waste heat boiler enters the Gas Cleaning With Bag House device, and dust content in the described gas is down to 10mg/Nm
3Below, reach the coal-gas recovering condition after the dedusting, through blower fan, three-way switch valve, add that wet saturator is laggard to enter enterprise's coal-gas recovering pipe network and gas chamber for the user, do not reach recovering condition, pass through the blower fan afterfire and diffuse.
2. the coal gas of converter bag-type dust purifying method based on energy recovery according to claim 1 is characterized in that, described Gas Cleaning With Bag House device adopts cylinder type, and is provided with shut-off device at Gas Cleaning With Bag House device import and export.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101201441A CN103374641A (en) | 2012-04-20 | 2012-04-20 | Converter gas cloth-bag dust-removing purification method based on energy recycling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012101201441A CN103374641A (en) | 2012-04-20 | 2012-04-20 | Converter gas cloth-bag dust-removing purification method based on energy recycling |
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| CN103374641A true CN103374641A (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012101201441A Pending CN103374641A (en) | 2012-04-20 | 2012-04-20 | Converter gas cloth-bag dust-removing purification method based on energy recycling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103757175A (en) * | 2014-01-17 | 2014-04-30 | 辽宁环宇环保技术有限公司 | Converter high-temperature flue gas heat recovery and dust purification system |
| CN105907915A (en) * | 2016-04-21 | 2016-08-31 | 中冶东方工程技术有限公司 | System and process of recycling and utilizing converter gas |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144111A (en) * | 2007-07-02 | 2008-03-19 | 昆明阳光基业股份有限公司 | Technique and combined system for removing dust from steelmaking convertor smoke by dry method and reusing waste heat |
| CN101570807A (en) * | 2009-05-31 | 2009-11-04 | 中冶京诚工程技术有限公司 | Steel converter coal gas purification and waste heat recycling system |
| CN101942538A (en) * | 2010-06-24 | 2011-01-12 | 北京国华新兴节能环保科技有限公司 | Process and equipment for dust collection and heat recovery by converter gas dry method |
-
2012
- 2012-04-20 CN CN2012101201441A patent/CN103374641A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144111A (en) * | 2007-07-02 | 2008-03-19 | 昆明阳光基业股份有限公司 | Technique and combined system for removing dust from steelmaking convertor smoke by dry method and reusing waste heat |
| CN101570807A (en) * | 2009-05-31 | 2009-11-04 | 中冶京诚工程技术有限公司 | Steel converter coal gas purification and waste heat recycling system |
| CN101942538A (en) * | 2010-06-24 | 2011-01-12 | 北京国华新兴节能环保科技有限公司 | Process and equipment for dust collection and heat recovery by converter gas dry method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103757175A (en) * | 2014-01-17 | 2014-04-30 | 辽宁环宇环保技术有限公司 | Converter high-temperature flue gas heat recovery and dust purification system |
| CN105907915A (en) * | 2016-04-21 | 2016-08-31 | 中冶东方工程技术有限公司 | System and process of recycling and utilizing converter gas |
| CN105907915B (en) * | 2016-04-21 | 2018-04-24 | 中冶东方工程技术有限公司 | A kind of Revolving furnace coal gas recovery utilizing system and technique |
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Application publication date: 20131030 |