CN204779646U - Novel two -period form converter coal gas waste heat recovery system - Google Patents
Novel two -period form converter coal gas waste heat recovery system Download PDFInfo
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- CN204779646U CN204779646U CN201520522920.XU CN201520522920U CN204779646U CN 204779646 U CN204779646 U CN 204779646U CN 201520522920 U CN201520522920 U CN 201520522920U CN 204779646 U CN204779646 U CN 204779646U
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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
Abstract
The utility model discloses a novel two -period form converter coal gas waste heat recovery system, in proper order including converter (1), converter flue (2), high temperature cyclone (3), firetube formula natural circulation converter coal gas exhaust -heat boiler (6), the coal gas dust removal purification device (7) connected, coal gas dust removal purification device (7) and converter coal gas store up cabinet (9) and diffuse chimney (10) and be connected, and the coal gas of converter (1) production is behind converter flue (2) vaporization cooling, and 800 -1000 DEG C is dropped to by 1400 -1600 to the temperature, and the coarse grain dust more than 50% in the coal gas, reentrant firetube formula natural circulation converter coal gas exhaust -heat boiler (6) are isolated in reentrant high temperature cyclone (3). The utility model discloses can guarantee under the circumstances that the flue gas did not leak waste heat recovery, can also reduce the sewage treatment cost of follow -up production simultaneously.
Description
Technical field
The utility model relates to coal gas waste heat recovery and purification techniques field in converter steelmaking, especially relates to a kind of novel two-section type afterheat of converter gas recovery system.
Background technology
China has the total output of steel of about 70% to adopt Bof technique, the recovery and utilization technology of coal gas of converter and environmental protection and energy-conservation closely related.Producing byproduct in Bof is 1400-1600 DEG C of coal gas of converter, and its energy matter is coal gas of high temperature sensible heat and calorific value is 7000 ~ 8000KJ/Nm
3chemical energy (CO).In order to improve energy recovery rate and reduce environmental pollution, in the industry of home and abroad, adopt " OG " wet dust removal purifying method and " LT " dry type static dust purifying method to RECOVERY OF CONVERTER GAS purification is general.Compare to the efficiency of dust collection of coal gas of converter, " LT " method dust-removal system efficiency of dust collection is high, and coal gas of converter dustiness can be down to about 10mg/m
3, when utilizing further, directly can be sent to user's point; And its dustiness of the coal gas of converter of OG system recoveries is at 50 ~ 150mg/m
3.
Because " OG " wet dust removal cleaning process technology is more ripe, " OG " wet dust removal purifying method is generally adopted in Iron and Steel Enterprises in China, its current technical process be 1400-1600 DEG C coal gas after gasification cooling flue, after gas temperature is down to 800-1000 DEG C, enter the overflow of one-level water and fix Venturi meter, sharply cool to less than 70 DEG C, divide into water trap, then the adjustable Venturi meter of secondary is entered, dust in flue gas mainly here removes, and then enters blower fan system through the elbow separator of 90 degree and tower water trap and delivers to user or diffusing tower.The main shortcoming of the method is, technical process is complicated, and resistance to flow is large, and after spray desuperheating and dedusting, heat recuperation rate is low, and coal gas of converter wastewater treatment difficulty, wet dust removal efficiency is low.This method causes heats a large amount of in converter gas to be utilized, both wasted the energy, added the consumption of water or steam, and created again a large amount of trade effluents, thus add the cost of wastewater treatment, and water ratio is high in coal gas, cause heavy wear and the corrosion of draught fan impeller.Dust iron powder substantially in coal gas, improving dust removal efficiency is also reclaim Mineral resources, reduces topsoil.
Containing O in coal gas of converter
2, CO and CO
2deng gas, very easily explode and make people poisoning, bringing serious threat to safety in production.As O in coal gas
2more than 2%, processing requirement coal gas should diffuse, and can not reclaim, and more can not enter electric dust removing system.So " LT " dry type static dust purifying method is better than " OG " method to gas purification treatment effect, but require very high to security of system.
Utility model content
The utility model is in order to solve the difficult problem in converter current coal-gas recovering process, improve the heat energy recovery rate of coal gas of converter, for herein is provided a kind of novel two-section type afterheat of converter gas recovery system, comprise the converter 1 of connection successively, converter flue 2, high temperature cyclone separator 3, fire-tube type natural circulation afterheat of converter gas boiler 6, coal gas dust removal refining plant 7, described coal gas dust removal refining plant 7 stores up cabinet 9 with coal gas of converter and diffusing chimney 10 is connected, described fire-tube type natural circulation afterheat of converter gas boiler 6 comprises upper drum and lower drum, on, be communicated with downtake by upcast between lower drum, the two ends of described lower drum are respectively equipped with a smoke-box 5, straight-through flue tube bank is furnished with in lower drum between two smoke-boxes 5, coal gas passes through in flue tube bank, water is filled with in lower drum outside flue tube bank, coal gas in flue tube bank carries out heat exchange with the water outside tube bank in flow process, produce saturation steam and enter upper drum from upcast, water in upper drum adds in lower drum from downtake, form a natural circulation carbonated drink loop.Because coal gas heat exchange pipeline is immersed in drum in water, just in case pipeline is by seepage, also operating safety can be guaranteed.
The utility model novel two-section type afterheat of converter gas recovery system, also comprise gas cleaning device 11, a high temperature tee joint switching valve 4 is connected with between high temperature cyclone separator 3 and fire-tube type natural circulation afterheat of converter gas boiler 6, high temperature tee joint switching valve 4, gas cleaning device 11 are connected successively with coal gas of converter storage cabinet 9, formation process bypass.
The utility model novel two-section type afterheat of converter gas recovery system, described coal gas dust removal refining plant 7 stores up cabinet 9 with coal gas of converter respectively by the first three-way switch valve 8 and diffusing chimney 10 is connected.
The utility model novel two-section type afterheat of converter gas recovery system, is connected with the second three-way switch valve 12, second three-way switch valve 12 and is also connected with diffusing chimney 10 between high temperature tee joint switching valve 4 and gas cleaning device 11.
The utility model novel two-section type afterheat of converter gas recovery system, described smoke-box 5, primarily of tube sheet and drum end socket composition, is also provided with ash discharge mechanism in the bottom of smoke-box 5, and flue tube bank is arranged between two tube sheets.
Coal gas of converter is after converter flue Vaporizing cooling, temperature is down to 800-1000 DEG C by 1400-1600 DEG C, enter high temperature cyclone separator, isolate more than 50% crude particle dust in coal gas, the gas speed entering waste heat boiler 6 can be improved, enhance gas-liquid heat transfer effect, meanwhile, decrease solid particulate matter in coal gas to the heating surface wear of waste heat boiler, be reduced in knot ash in fire tube.Then enter fire-tube type natural circulation afterheat of converter gas boiler, produce saturation steam.Steam enters the air space of upper drum along upcast, by steam separator in cylinder, enters gas pipeline and is supplied to user.Water in upper drum flows in lower drum along downtake, forms a natural circulation carbonated drink loop with lower drum.Coal gas of converter is after again lowering the temperature, and now, gas temperature is less than 250 DEG C, can adopt the fiber bag precipitator that cost performance is higher.
Between high temperature cyclone separator 3 and fire-tube type natural circulation afterheat of converter gas boiler 6, be provided with high temperature tee joint switching valve 4, for switching between flue collector and technique bypass flue, be convenient to the boiler time-based maintenance of fire-tube type natural circulation afterheat of converter gas and breakdown maintenance.
The coal gas being less than 250 DEG C by fire-tube type natural circulation afterheat of converter gas boiler temperature out, enter fiber bag precipitator, further udst separation, coal gas dust content rate is less than 30mg/Nm
3, reach national requirements for environmental protection.
Be provided with first three-way switch valve after sack cleaner, its Main Function be coal gas from sack cleaner out after, according to coal-gas recovering processing requirement, in coal gas, the levels of CO meets processing requirement, coal gas enters coal gas of converter hold-up vessel, otherwise T-valve switches to emptying bypass.
The beneficial effects of the utility model are:
1, in the utility model coal gas after Vaporizing cooling converter flue, high temperature cyclone separator is adopted to carry out first time dust removal process, the dust removing about 50% of iron powder will be mainly in coal gas, greatly reduce containing grey rate, favourable condition is created for coal gas heat reclaims further, the flow of gas speed in waste heat boiler can be improved, both heat transfer effect between gas-liquid had been enhanced, prevent again coal gas from entering fire-tube type natural circulation afterheat of converter gas boiler and produce knot ash and wear phenomenon, improve waste heat boiler heat-transfer effect and safety in operation.
2, because the gas line in waste heat boiler is restrained for straight-through and be immersed in drum in water, restrain as straight tube, dead angle of not turning, avoid knot ash in pipe and affect heat-transfer effect; In addition, be circulation coal gas in pipe, if pipeline has Seepage, because tube bank is immersed in water, also can guarantee environmental safety.
3, in the utility model, coal gas adopts secondary dry gas cleaning, both reduce water ratio in coal gas, additionally reduced coal gas of converter sewage generation, adopt two-section type waste heat reclaiming process simultaneously, improve the gas heat rate of recovery, the caloric power of gas reclaimed also is significantly increased with amount.
Accompanying drawing explanation
The utility model illustrates by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is schematic diagram of the present utility model.
Embodiment
All features disclosed in this specification sheets, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Arbitrary feature disclosed in this specification sheets, unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
Novel two-section type afterheat of converter gas recovery system as shown in Figure 1, comprise the converter 1 of connection, converter flue 2, high temperature cyclone separator 3, fire-tube type natural circulation afterheat of converter gas boiler 6, coal gas dust removal refining plant 7 successively, described coal gas dust removal refining plant 7 stores up cabinet 9 with coal gas of converter respectively by the first three-way switch valve 8 and diffusing chimney 10 is connected.Also comprise gas cleaning device 11, a high temperature tee joint switching valve 4 is connected with between high temperature cyclone separator 3 and fire-tube type natural circulation afterheat of converter gas boiler 6, high temperature tee joint switching valve 4, gas cleaning device 11 are connected successively with coal gas of converter storage cabinet 9, formation process bypass.Between high temperature tee joint switching valve 4 and gas cleaning device 11, be connected with the second three-way switch valve 12, second three-way switch valve 12 be also connected with diffusing chimney 10.
Wherein, described fire-tube type natural circulation afterheat of converter gas boiler 6 comprises upper drum and lower drum, on, be communicated with downtake by upcast between lower drum, the two ends of described lower drum are respectively equipped with a smoke-box 5, described smoke-box 5 is primarily of tube sheet and drum end socket composition, ash discharge mechanism is also provided with in the bottom of smoke-box 5, straight-through flue tube bank is furnished with in lower drum between two tube sheets, coal gas passes through in flue tube bank, water is filled with in lower drum outside flue tube bank, coal gas in flue tube bank carries out heat exchange with the water outside tube bank in flow process, produce saturation steam and enter upper drum from upcast, water in upper drum adds in lower drum from downtake, form a natural circulation carbonated drink loop.Because coal gas heat exchange pipeline is immersed in drum in water, just in case pipeline is by seepage, also operating safety can be guaranteed.
Coal gas of converter is after converter flue Vaporizing cooling, temperature is down to 800-1000 DEG C by 1400-1600 DEG C, enter high temperature cyclone separator, isolate more than 50% crude particle dust in coal gas, the gas speed entering waste heat boiler 6 can be improved, enhance gas-liquid heat transfer effect, meanwhile, decrease solid particulate matter in coal gas to the heating surface wear of waste heat boiler, be reduced in knot ash in fire tube.Then enter fire-tube type natural circulation afterheat of converter gas boiler, produce saturation steam.Steam enters the air space of upper drum along upcast, by steam separator in cylinder, enters gas pipeline and is supplied to user.Water in upper drum flows in lower drum along downtake, forms a natural circulation carbonated drink loop with lower drum.Coal gas of converter is after again lowering the temperature, and now, gas temperature is less than 250 DEG C, can adopt the fiber bag precipitator that cost performance is higher.
Between high temperature cyclone separator 3 and fire-tube type natural circulation afterheat of converter gas boiler 6, be provided with high temperature tee joint switching valve 4, for switching between flue collector and technique bypass flue, be convenient to the boiler time-based maintenance of fire-tube type natural circulation afterheat of converter gas and breakdown maintenance.
The coal gas being less than 250 DEG C by fire-tube type natural circulation afterheat of converter gas boiler temperature out, enter fiber bag precipitator, further udst separation, coal gas dust content rate is less than 30mg/Nm
3, reach national requirements for environmental protection.
Be provided with first three-way switch valve after sack cleaner, its Main Function be coal gas from sack cleaner out after, according to coal-gas recovering processing requirement, in coal gas, the levels of CO meets processing requirement, coal gas enters coal gas of converter hold-up vessel, otherwise T-valve switches to emptying bypass.
The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (5)
1. a novel two-section type afterheat of converter gas recovery system, it is characterized in that: comprise the converter (1) of connection, converter flue (2), high temperature cyclone separator (3), fire-tube type natural circulation afterheat of converter gas boiler (6), coal gas dust removal refining plant (7) successively, described coal gas dust removal refining plant (7) stores up cabinet (9) with coal gas of converter and diffusing chimney (10) is connected;
Described fire-tube type natural circulation afterheat of converter gas boiler (6) comprises upper drum and lower drum, be communicated with downtake by upcast between upper and lower drum, the two ends of described lower drum are respectively equipped with a smoke-box (5), straight-through flue tube bank is furnished with in lower drum between two smoke-boxes (5), coal gas passes through in flue tube bank, is filled with water in the lower drum outside flue tube bank.
2. novel two-section type afterheat of converter gas recovery system according to claim 1, it is characterized in that: also comprise gas cleaning device (11), a high temperature tee joint switching valve (4) is connected with between high temperature cyclone separator (3) and fire-tube type natural circulation afterheat of converter gas boiler (6), high temperature tee joint switching valve (4), gas cleaning device (11) are connected successively with coal gas of converter storage cabinet (9), formation process bypass.
3. novel two-section type afterheat of converter gas recovery system according to claim 2, is characterized in that: described coal gas dust removal refining plant (7) stores up cabinet (9) with coal gas of converter respectively by the first three-way switch valve (8) and diffusing chimney (10) is connected.
4. novel two-section type afterheat of converter gas recovery system according to claim 1, it is characterized in that: between high temperature tee joint switching valve (4) and gas cleaning device (11), be connected with the second three-way switch valve (12), the second three-way switch valve (12) is also connected with diffusing chimney (10).
5. novel two-section type afterheat of converter gas recovery system according to claim 1, it is characterized in that: described smoke-box (5) is primarily of tube sheet and drum end socket composition, also be provided with ash discharge mechanism in the bottom of smoke-box (5), flue tube bank is arranged between two tube sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520522920.XU CN204779646U (en) | 2015-07-17 | 2015-07-17 | Novel two -period form converter coal gas waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520522920.XU CN204779646U (en) | 2015-07-17 | 2015-07-17 | Novel two -period form converter coal gas waste heat recovery system |
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| Publication Number | Publication Date |
|---|---|
| CN204779646U true CN204779646U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520522920.XU Expired - Fee Related CN204779646U (en) | 2015-07-17 | 2015-07-17 | Novel two -period form converter coal gas waste heat recovery system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011457A (en) * | 2016-07-15 | 2016-10-12 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Magnetizing roasting system and technology of iron ore powder difficult to beneficiate |
| CN106766958A (en) * | 2016-12-27 | 2017-05-31 | 鞍钢集团工程技术有限公司 | For the bypass heat circulating system and application method of industrial furnace waste heat recovery |
-
2015
- 2015-07-17 CN CN201520522920.XU patent/CN204779646U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011457A (en) * | 2016-07-15 | 2016-10-12 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Magnetizing roasting system and technology of iron ore powder difficult to beneficiate |
| CN106766958A (en) * | 2016-12-27 | 2017-05-31 | 鞍钢集团工程技术有限公司 | For the bypass heat circulating system and application method of industrial furnace waste heat recovery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20200717 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |