CN102816573B - Coke-oven single novel bridge pipe raw gas waste-heat recovery device - Google Patents
Coke-oven single novel bridge pipe raw gas waste-heat recovery device Download PDFInfo
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- CN102816573B CN102816573B CN201210317968.8A CN201210317968A CN102816573B CN 102816573 B CN102816573 B CN 102816573B CN 201210317968 A CN201210317968 A CN 201210317968A CN 102816573 B CN102816573 B CN 102816573B
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Abstract
A coke-oven single novel bridge pipe raw gas waste-heat recovery device comprises a bridge pipe ascending section and a bridge pipe descending section. A bridge pipe transition section is arranged between the bridge pipe ascending section and the bridge pipe descending section, an evaporator is arranged in the bridge pipe descending section and connected with a steam pocket through a pipeline and is a multilayer evaporator with widened heating areas, a superheater is arranged in the bridge pipe transition section, and a raw gas passage of the bridge pipe descending section is divided through the evaporator into a plurality of independent passages used for circulating raw gas. The heating areas are increased, so that waste-heat recovery rate of the raw gas is increased; and modularized design is adopted, and deformation design is performed to a bridge pipe, so that surrounding processes are unaffected. Consequently, the coke-oven single novel bridge pipe raw gas waste-heat recovery device is simple in structural design, easy to maintain, convenient to wash and capable of effectively recovering the waste heat of the raw gas.
Description
Technical field
The present invention relates to industrial afterheat recovery utilization and technical field, a kind of waste heat of coke oven crude gas recovering device, the particularly single bridge tube raw coke oven gas of a kind of coke oven waste heat recovering device.
Background technique
Coking industry receives much concern as high energy consumption industry.In coking by coke oven process, raw gas temperature in coke oven coke oven uprising tube is up to 750 ℃, contain a large amount of sensible heats, for reducing coal oven dithio-gas temperature, be convenient to follow-up coking process processing, tratitional technology adopts the technique cooling down high-temperature raw coke oven gas of spray ammoniacal liquor chilling, by bridge tube, directly contacts with raw coke oven gas with gas collecting tube spray cycle ammoniacal liquor, by cyclic ammonia water, gasifies in a large number, make raw coke oven gas reduces heat to 80-85 ℃, after cooling, raw coke oven gas is indirectly cooled to normal temperature with cooling water again in primary cooler.The sensible heat of a large amount of raw coke oven gas has not only been wasted in this technological process, and consumes a large amount of ammoniacal liquor, wasted a large amount of water resourcess and electric power again, increases effluent discharge.The raw coke oven gas of 750 ℃ of left and right that coke oven is discharged is due to its complicated component, and along with the reduction of temperature has separating out of the components such as tar, do not have so far good scheme to reclaim it.Therefore coal oven dithio-gas sensible heat recovery research is one of focus of coking industry energy-saving and emission-reduction always.
Waste heat of coke oven crude gas recovery at present mainly contains two kinds of patterns and is studying: the one, adopt the asending pipe device with function of recovering waste heat, but because its spatial structure is narrow and small, vaporizer is arranged and is affected, and cannot fully reclaim raw coke oven gas residual heat resources, causes being difficult to promoting; The 2nd, adopt raw coke oven gas is concentrated and drawn, concentrated residual neat recovering system is set in addition.This kind of tactic pattern is because combustibility, the tar of its system complex, raw coke oven gas are separated out the factors such as coking, and the tightness of system etc. require very high, and system safety operation is subject to very large challenge.
Summary of the invention
In order to address the above problem, the invention provides the single bridge tube raw coke oven gas of a kind of coke oven waste heat recovering device, comprise bridge tube ascent stage and bridge tube descending branch, between described bridge tube ascent stage and bridge tube descending branch, be provided with bridge tube changeover portion, in described bridge tube descending branch, be provided with vaporizer, described vaporizer adopts the Multilayer evaporator that increases heating surface, in described bridge tube changeover portion, be provided with superheater, bridge tube descending branch raw coke oven gas passage is divided into some raw coke oven gas autonomous channels for the raw coke oven gas that circulates by described Multilayer evaporator;
Raw coke oven gas forms raw coke oven gas circulation passage through the raw coke oven gas autonomous channel of bridge tube ascent stage, bridge tube changeover portion, bridge tube descending branch;
Water forms steam circulation passage through bridge tube descending branch vaporizer, superheater.
Described Multilayer evaporator comprises the heat exchanger of upper header, lower collecting box and some longitudinal settings, those heat exchangers are located at respectively between upper header and lower collecting box, and communicate with both respectively, described lower collecting box is connected with intake pipe, heat exchanger and tube wall non-contact, and heat exchanger is independent of one another, heat exchanger each other and/or be provided for respectively the circulating raw coke oven gas autonomous channel of raw coke oven gas, between heat exchanger and bridge tube wall and/or internal layer heat exchanger center.
Described those heat exchangers are annular one of them that arranges, be arranged in parallel.
The bridge tube of bridge tube descending branch is provided with successively from outside to inside descending branch steel pipe external insulation layer, descending branch steel pipe, for convenience, cleans the descending branch steel pipe inner wall ceramic coating of tar.
The top of upper header is provided with spray ammonia point.
The single bridge tube raw coke oven gas of a kind of coke oven waste heat recovering device, comprise bridge tube ascent stage and bridge tube descending branch, between described bridge tube ascent stage and bridge tube descending branch, be provided with bridge tube changeover portion, in described bridge tube descending branch, be provided with vaporizer, described vaporizer adopts the Multilayer evaporator that increases heating surface, in described bridge tube changeover portion, be provided with superheater, vaporizer comprises the many pipelines that are set up in parallel, the raw coke oven gas autonomous channel of the raw coke oven gas that is formed between non-contact and tube and tube between described pipeline circulating;
Raw coke oven gas forms raw coke oven gas circulation passage through the raw coke oven gas autonomous channel of bridge tube ascent stage, bridge tube changeover portion, bridge tube descending branch;
Water forms steam circulation passage through bridge tube descending branch vaporizer, drum, superheater.
The object of the invention is keeping coke oven coke oven uprising tube, under the constant prerequisite of gas collecting tube and main technique, the bridge tube that coke oven is connected to asending pipe and gas collecting tube carries out deformation design, bridge tube is transformed into the bridge tube ascent stage, bridge tube changeover portion and bridge tube descending branch, make full use of the upper space of coke oven, the design of conjugative bridge tubular construction increases Multi-layer exchanging heat device in the descending branch of bridge tube, increase raw coke oven gas waste heat recovering device, fully to reclaim raw coke oven gas waste heat, inwall in bridge tube descending branch is provided with ceramic coating, and heat exchanger is arranged on to the descending branch of bridge tube, the tar that can effectively solve in heat recovery process is separated out problem.Meanwhile, also can reduce the consumption of original system ammoniacal liquor and subsystem power consumption, realize coke oven energy-saving and emission-reduction.
The invention has the advantages that:
1. at bridge tube place, waste heat recovering device is set, takes full advantage of the space on coke oven top;
2. in descending branch, set up main heating surface, the cleaning after being convenient to tar and separating out;
3. adopt single novel bridge tube raw coke oven gas waste heat recovering device independent design, be convenient to renewal and the maintenance of equipment, reduce as far as possible coke oven original system is affected;
4. adopt the design of Multi-layer exchanging heat device, between descending branch tube wall and outer heating surface, between two-layer heat exchanger, internal layer heating surface inside all forms raw coke oven gas passage, is convenient to abundant heat exchange;
5. bridge tube inwall adopts Ceramic Art Design, reduces the adhesion of separating out tar;
6. ammoniacal liquor spray point is set, in conjunction with tar, separates out degree and take appropriate frequency to clean.
The present invention brings following beneficial effect:
1. at bridge tube place, the space that waste heat recovering device not only takes full advantage of coke oven top is set, and suitably increases heating surface with abundant as far as possible recovery waste heat in conjunction with upper space;
2. the cleaning of main heating surface after being arranged in bridge tube descending branch and being convenient to tar and separating out, avoid or slow down because of raw gas temperature reduce after tar separate out and cause heating surface exchange capability of heat to decline, even lost efficacy;
3. single novel bridge tube raw coke oven gas waste heat recovering device independent design is convenient to renewal and the maintenance of equipment, reduces as far as possible coke oven original system is affected;
4. because raw gas temperature declines, to ammoniacal liquor slump in demand, reduce the power consumption of ammoniacal liquor subsystem simultaneously;
5. by recovery waste heat, can obviously reduce coke oven process energy consumption, energy saving, reduces discharge, produces good economic and social benefit.
The present invention has not only increased heating surface, improves the waste heat of coke oven crude gas recovery rate; And by adopting modular design, except bridge tube has been carried out to deformation design, periphery technique is all unaffected, structural design simply, easily safeguard, be convenient to clean, can effectively reclaim raw coke oven gas waste heat.
Accompanying drawing explanation
Fig. 1 is the single bridge tube raw coke oven gas of coke oven of the present invention waste heat recovering device structural design schematic diagram;
Fig. 2 is the single bridge tube raw coke oven gas of coke oven of the present invention waste heat recovering device A-A generalized section;
Fig. 3 is bridge tube descending branch partial structurtes schematic diagram of the present invention;
Fig. 4 is another schematic diagram of heat exchanger of the present invention.
Embodiment
Further illustrate with reference to the accompanying drawings the present invention.
The single bridge tube raw coke oven gas of a kind of coke oven waste heat recovering device, comprise bridge tube ascent stage 2 and bridge tube descending branch 4, between described bridge tube ascent stage 2 and bridge tube descending branch 4, be provided with bridge tube changeover portion 3, the two ends of described bridge tube descending branch 4 are respectively equipped with upper header 5 and lower collecting box 6, between described upper header 5 and lower collecting box 6, longitudinally can be provided with some heat exchangers 7, described lower collecting box 6 is connected with intake pipe 61, upper header 5 is connected with drum 8 by pipeline 51, in described bridge tube changeover portion 3, be provided with superheater 9, superheater entrance 91 is connected with drum 8, and superheater outlet 92 connects user side.
From crosscut section, described bridge tube descending branch 4 is provided with descending branch steel pipe external insulation layer 41, descending branch steel pipe 42, descending branch steel pipe inner wall ceramic coating 43 from outside to inside successively.
The top of described upper header is provided with spray ammonia point 52.
Embodiment 1
Consult accompanying drawing 3, the heat exchanger 7 of the present embodiment is that double-deck annular arranges, heat exchanger 7 is respectively equipped with internal layer heat exchanger 71 and outer heat exchanger 72, internal layer heat exchanger 71 and outer heat exchanger 72 are communicated with upper header 5 and lower collecting box 6 respectively, internal layer heat exchanger 71 and outer heat exchanger 72 are located at the middle part of bridge tube descending branch 4, do not contact with tube wall, therefore, between tube wall, internal layer heat exchanger 71 and outer heat exchanger 72 threes, form three annular raw coke oven gas autonomous channels 44.
Asending pipe 1, bridge tube ascent stage 2, bridge tube changeover portion 3 and bridge tube descending branch 4 are connected successively, and upper header 5 is connected with drum 8 by pipeline 51, is provided with superheater 9 in bridge tube changeover portion 3, and superheater entrance 91 is connected with drum 8, and superheater outlet 92 connects user side.
Demineralized water enters lower collecting box by intake pipe 61, from lower collecting box 6, from internal layer heat exchanger 71 and outer heat exchanger 72, rise in upper header 5 respectively, demineralized water enters the process of upper header 5 from lower collecting box 6, due in vaporizer is provided with, outer two-layer heat exchanger, between internal layer heat exchanger 71 and outer heat exchanger 72 and tube wall, form three annular raw coke oven gas autonomous channels 44, raw coke oven gas passes through from three annular raw coke oven gas autonomous channels 44, demineralized water fills a part heat exchange with raw coke oven gas in bridge tube descending branch, after demineralized water heat exchange, form steam water interface, steam water interface enters drum 8 by pipeline 51, steam water interface carries out carbonated drink separation in drum 8, saturated vapour after separation enters in superheater 9 from superheater entrance 91, because the raw gas temperature in bridge tube changeover portion 3 is higher, saturated vapour in high temperature raw coke oven gas and superheater 9 carries out heat exchange again, after saturated vapour heat exchange, become high-quality superheated vapor, superheated vapor is passed to user side from superheater outlet 92, demineralized water is by twice heat exchange of bridge tube descending branch and bridge tube changeover portion, and, vaporizer is provided with internal layer heat exchanger and outer heat exchanger, raw coke oven gas in bridge tube descending branch and internal layer heat exchanger and the abundant heat exchange of outer heat exchanger, the absorption of filling part the heat of raw coke oven gas, and raw coke oven gas enters the bridge tube ascent stage 2 from asending pipe 1, during then by bridge tube changeover portion 3 and bridge tube descending branch 4, carry out heat exchange with saturated vapour and demineralized water respectively, the temperature of raw coke oven gas also progressively reduces, raw coke oven gas after cooling enters gas collecting tube from bridge tube raw coke oven gas outlet 11, raw coke oven gas waste heat is absorbed and used, the top of the upper header 5 spray ammonia point 52 that also distributing, be convenient to clean the tar on tube wall and heat exchanger, tar after cleaning flows into gas collecting tube and carries out conventional treatment.
Embodiment 2
Consult accompanying drawing 4, the heat exchanger 7 of the present embodiment is the many pipelines that are set up in parallel, the 4 row superheater tubes 73 of heat exchanger 7 for be arrangeding in parallel, superheater tube 73 is communicated with and does not contact with tube wall with lower collecting box 6 with upper header 5 respectively, therefore, every adjacent two row's superheater tubes 73, between between superheater tube 73 and tube wall, just formed raw coke oven gas passage 45, raw coke oven gas is from bridge tube changeover portion 3 enters bridge tube descending branch 4, raw coke oven gas enters bridge tube raw coke oven gas outlet 11 from raw coke oven gas passage 45, the demineralized water of raw coke oven gas in raw coke oven gas passage 45 and in superheater tube 73 fills a part heat exchange, the just no longer narration identical with embodiment 1 of other steps.
Above-mentioned disclosed be only specific embodiments of the invention, this embodiment is only that clearer explanation the present invention is used, and limitation of the invention not, the changes that any person skilled in the art can think of, all should drop in protection domain.
Claims (7)
1. the single bridge tube raw coke oven gas of a coke oven waste heat recovering device, it is characterized in that, comprise bridge tube ascent stage and bridge tube descending branch, between described bridge tube ascent stage and bridge tube descending branch, be provided with bridge tube changeover portion, in described bridge tube changeover portion, be provided with superheater, in described bridge tube descending branch, be provided with vaporizer, described vaporizer adopts the Multilayer evaporator that increases heating surface, and described bridge tube descending branch raw coke oven gas passage is divided into some raw coke oven gas autonomous channels for the raw coke oven gas that circulates by described Multilayer evaporator;
Raw coke oven gas forms raw coke oven gas circulation passage through the raw coke oven gas autonomous channel of bridge tube ascent stage, bridge tube changeover portion, bridge tube descending branch;
Water forms steam circulation passage through bridge tube descending branch vaporizer, superheater.
2. the single bridge tube raw coke oven gas of coke oven as claimed in claim 1 waste heat recovering device, it is characterized in that, described Multilayer evaporator comprises the heat exchanger of upper header, lower collecting box and some longitudinal settings, those heat exchangers are located at respectively between upper header and lower collecting box, and communicate with both respectively, described lower collecting box is connected with intake pipe, heat exchanger and tube wall non-contact, and heat exchanger is independent of one another, heat exchanger each other and/or be provided for respectively the circulating raw coke oven gas autonomous channel of raw coke oven gas, between heat exchanger and bridge tube wall and/or internal layer heat exchanger center.
3. the single bridge tube raw coke oven gas of coke oven as claimed in claim 2 waste heat recovering device, is characterized in that, described those heat exchangers are annular one of them that arranges, be arranged in parallel.
4. the single bridge tube raw coke oven gas of coke oven as claimed in claim 2 waste heat recovering device, it is characterized in that, the bridge tube of bridge tube descending branch is provided with successively from outside to inside descending branch steel pipe external insulation layer, descending branch steel pipe, for convenience, cleans the descending branch steel pipe inner wall ceramic coating of tar.
5. the single bridge tube raw coke oven gas of the coke oven waste heat recovering device as described in any one in claim 2-4, is characterized in that, the top of upper header is provided with spray ammonia point.
6. the single bridge tube raw coke oven gas of coke oven as claimed in claim 1 waste heat recovering device, is characterized in that, also comprises drum, and described drum is connected with described superheater, and described vaporizer is connected with described drum by pipeline.
7. the single bridge tube raw coke oven gas of a coke oven waste heat recovering device, it is characterized in that, comprise bridge tube ascent stage and bridge tube descending branch, between described bridge tube ascent stage and bridge tube descending branch, be provided with bridge tube changeover portion, in described bridge tube descending branch, be provided with vaporizer, described vaporizer adopts the Multilayer evaporator that increases heating surface, in described bridge tube changeover portion, be provided with superheater, vaporizer comprises the many pipelines that are set up in parallel, the raw coke oven gas autonomous channel of the raw coke oven gas that is formed between non-contact and tube and tube between described pipeline circulating;
Raw coke oven gas forms raw coke oven gas circulation passage through the raw coke oven gas autonomous channel of bridge tube ascent stage, bridge tube changeover portion, bridge tube descending branch;
Water forms steam circulation passage through bridge tube descending branch vaporizer, superheater.
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| CN201210317968.8A CN102816573B (en) | 2012-08-31 | 2012-08-31 | Coke-oven single novel bridge pipe raw gas waste-heat recovery device |
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| CN201210317968.8A CN102816573B (en) | 2012-08-31 | 2012-08-31 | Coke-oven single novel bridge pipe raw gas waste-heat recovery device |
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| CN102816573B true CN102816573B (en) | 2014-04-30 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103242866B (en) * | 2013-05-17 | 2015-01-14 | 北京中衡国通能源科技有限责任公司 | Heat recovery device for raw coke oven gas |
| CN104726110A (en) * | 2015-03-26 | 2015-06-24 | 常州江南冶金科技有限公司 | Coke oven three-way bridge pipeline heat exchanger device |
| CN106839808B (en) * | 2017-03-14 | 2022-12-06 | 中冶华天工程技术有限公司 | High-low temperature comprehensive recovery system and method for waste heat of raw gas |
| CN107367171B (en) * | 2017-07-11 | 2023-07-25 | 南京华电节能环保股份有限公司 | Corrosion-resistant coking-resistant bridge pipe for recycling waste heat of flue gas of coke oven |
| CN107325847B (en) * | 2017-08-04 | 2022-10-28 | 浙江大学 | Method and device for cooling and recovering waste heat of tar-containing high-temperature pyrolysis gasified gas |
| CN113091481A (en) * | 2021-04-15 | 2021-07-09 | 唐山市宝凯科技有限公司 | Device and method for recovering waste heat of crude gas of bridge pipe |
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| CN201569335U (en) * | 2009-12-25 | 2010-09-01 | 北京京诚科林环保科技有限公司 | Up-down header type cannula heat exchanger and residual heat boiler thereof |
| CN102434237A (en) * | 2011-11-29 | 2012-05-02 | 北京佰能电气技术有限公司 | Power generation system capable of jointly using sensible heat of raw gas of coke oven and waste heat of waste smoke |
| CN202808703U (en) * | 2012-08-31 | 2013-03-20 | 上海宝钢节能技术有限公司 | Single novel bridge tube waste gas waste heat recovery device for coke oven |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100503202B1 (en) * | 2000-12-12 | 2005-07-25 | 주식회사 포스코 | Apparatus for controlling the hot gas in the upper portion of the quenching tower |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201569335U (en) * | 2009-12-25 | 2010-09-01 | 北京京诚科林环保科技有限公司 | Up-down header type cannula heat exchanger and residual heat boiler thereof |
| CN102434237A (en) * | 2011-11-29 | 2012-05-02 | 北京佰能电气技术有限公司 | Power generation system capable of jointly using sensible heat of raw gas of coke oven and waste heat of waste smoke |
| CN202808703U (en) * | 2012-08-31 | 2013-03-20 | 上海宝钢节能技术有限公司 | Single novel bridge tube waste gas waste heat recovery device for coke oven |
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