CN103147807B - Power generation system using waste heat of coke oven crude gas - Google Patents
Power generation system using waste heat of coke oven crude gas Download PDFInfo
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- CN103147807B CN103147807B CN201310061738.4A CN201310061738A CN103147807B CN 103147807 B CN103147807 B CN 103147807B CN 201310061738 A CN201310061738 A CN 201310061738A CN 103147807 B CN103147807 B CN 103147807B
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Abstract
The invention provides a power generation system using waste heat of coke oven crude gas, and solves the problems that the waste of conventional coke oven heat energy is larger, and a large amount of split products in the crude gas are consumed without return. The power generation system comprises a waste heat gas passage, a waste heat boiler, a turboset and a generator set which are connected in sequence; the waste heat gas passage is connected with a coke oven rising pipeline; a superheater, an evaporimeter and an economizer are arranged in the waste heat boiler in the gas flowing direction in sequence; the economizer is connected with a softened water pump outlet; and the superheater is connected with the turboset through a steam pipeline. The power generation system is simpler, equipment is easy to arrange, the occupied area is small, the temperature of the raw coke oven gas is reduced from 650-750 DEG C to 82-86 DEG C since the crude gas is cooled, and meanwhile, about 60% of tar is cooled and collected in a mechanization slot for recycling.
Description
Technical field
The present invention relates to the raw coke oven gas Btu utilization technical field of coke oven, be specifically related to a kind of power generation system utilizing waste heat of coke oven crude gas.
Background technique
Coking industry is the development along with iron and steel enterprise, also be one of basic industry of Iron And Steel Industry, coking industry is also big power consumer's (according to related data introduction: coke-oven plant's energy consumption accounts for production capacity about 50% ~ 60%) simultaneously, wherein process of coking add that heat consumption accounts for gas yield 45% ~ 50%, therefore coking industry is also the important industry of energy-saving and emission-reduction.
Coal when coking except having about 75% to become except coke, also the have an appointment various chemical products of 25% generation and coal gas.Reclaim these chemical products to have great significance to comprehensive utilization coal resource and economic construction.
When coal carries out destructive distillation in coke furnace carbonization chamber, under high temperature action, ature of coal there occurs a series of physicochemical change.Loading coal steams surface moisture below 200 DEG C, separates out the gas such as carbon dioxide, methane be adsorbed in coal simultaneously, and then along with the rising of temperature, coal starts to decompose.The large molecule end oxygenatedchemicals of coal starts to decompose in 250 ~ 300 DEG C, generates carbon dioxide, water and phenol (mainly higher phenols).When temperature is increased to nearly 500 DEG C, the large molecule aromatic fused ring compound of coal starts to decompose, generate aliphatic hydrocarbon, discharge hydrogen simultaneously, or be called primary decomposition product, when first decomposition product is by fervid coke with when upwards flowing along coking chamber wall, the temperature be subject to is more much higher than the temperature of carbonization chamber head room.Therefore, the hydrocarbon in this part gas, before arrival carbonization chamber head room, just have passed through the aromatization process (generation aromatic hydrocarbon) of hydrogen precipitation and cycloalkane or alkane, has generated second heat pyrolysis product.This is an irreversible course of reaction, and compound generated thus just no longer changes at carbonization chamber head room.
Both at home and abroad up to the present, the design of coke oven is as follows: coking product raw coke oven gas enters coke oven coke oven uprising tube by carbonization chamber blower fan space, then pneumatic trough is entered through coke oven coke oven uprising tube, cooled by ammonia spray in pneumatic trough, the raw coke oven gas cooling latter 650 DEG C ~ 750 DEG C is cooled to about 82 ~ 86 DEG C; Second step is cooled to 25 ~ 35 DEG C again in coal gas primary cooler, and a large amount of heat energy of this process is by having slatterned in vain, and a large amount of pyrolysis product simultaneously contained in these high temperature raw coke oven gas is also taken as refuse to having disposed.
Summary of the invention
The invention provides a kind of power generation system utilizing waste heat of coke oven crude gas, solve the problem that a large amount of pyrolysis products of containing in the comparatively large and raw coke oven gas of existing coke oven thermal waste are wasted.
Technological scheme of the present invention is achieved in that a kind of power generation system utilizing waste heat of coke oven crude gas, comprises gas using residual heat road, exhaust heat boiler, steam turbine set and generator set, and gas using residual heat road, exhaust heat boiler, steam turbine set are connected successively with generator set; Gas using residual heat road is connected with coke oven coke oven uprising tube road, superheater, vaporizer and economizer is set gradually by raw coke oven gas circulating direction in exhaust heat boiler, economizer exports with softened water pump and is connected, and superheater is connected with steam turbine set by steam line, and exhaust heat boiler lower end is connected with pneumatic trough.
Wherein, preferably, high pressure aqua ammonia spray equipment is provided with in described pneumatic trough; Pneumatic trough lower end is connected with the first gas-liquid separator, and the gas pipeline end of the first gas-liquid separator is connected with blower fan, and the fluid pipeline end of the first gas-liquid separator is provided with the mechanization groove of the tar for collecting ammoniacal liquor and raw coke oven gas cooling generation.
Wherein, preferably, the heating surface bank of described superheater, vaporizer and economizer is finned-tube bundle.
Wherein, preferably, the end of described evaporator heat transfer tube bank is connected with the second gas-liquid separator.
Wherein, preferably, described exhaust heat boiler is also connected with the drain pipe be connected with drainage.
It is comparatively simple that the present invention utilizes waste heat of coke oven crude gas to produce steam generating system, and equipment is easily arranged, floor space is few; Exhaust heat boiler adopts Influences of Structure of Spiral Finned Tube waste heat recovering device, conducts heat to be undertaken by tube wall transmission, and its heat is directly passed to saturation water and carries out heat exchange, says from heat transfer mechanism, and the coefficient of heat transfer of water is far longer than the heat transfer coefficient of gas side, and heat exchange efficiency is high.Raw coke oven gas is by above-mentioned cooling procedure, and temperature is down to 82 ~ 86 DEG C by 650 ~ 750 DEG C, has the tar of about 60% to cool down simultaneously, collects in mechanization groove and recycles; The feature of steam turbine generator set is that volume is little, lightweight, convenient transportation, and structure is simple, Security is high, and fitting operation is easy to maintenance.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 embodiment of the present invention working principle schematic diagram;
Fig. 2 embodiment of the present invention exhaust heat boiler structural representation.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As depicted in figs. 1 and 2, the invention provides a kind of power generation system utilizing waste heat of coke oven crude gas, comprise gas using residual heat road 2, exhaust heat boiler 3, steam turbine set 5 and generator set 6, gas using residual heat road 2, exhaust heat boiler 3, steam turbine set 5 are connected successively with generator set 6; Gas using residual heat road 2 is connected with coke oven coke oven uprising tube road 1, superheater 11, vaporizer 12 and economizer 13 is set gradually by raw coke oven gas circulating direction in exhaust heat boiler 2, economizer 13 exports with softened water pump 4 and is connected, and superheater 11 is connected with steam turbine set 5 by steam line.The heating surface bank of superheater 11, vaporizer 12 and economizer 13 is spiral-finned tube bundle.The end of vaporizer 12 heating surface bank is connected with the second gas-liquid separator 14.Exhaust heat boiler is also connected with the drain pipe be connected with drainage.
The lower end of exhaust heat boiler 3 is connected with pneumatic trough 7, is provided with high pressure aqua ammonia spray equipment in pneumatic trough 7; The gas pipeline end that pneumatic trough 7 lower end is connected with the first gas-liquid separator 8, first gas-liquid separator 8 is connected with blower fan 9, and the fluid pipeline end of the first gas-liquid separator 8 is provided with the mechanization groove 10 of the tar for collecting ammoniacal liquor and raw coke oven gas cooling generation.
First soft water enter economizer through softened water pump, and soft water absorbs heat and is warmed up to and enters drum a little less than the saturation temperature under drum pressure in economizer.Enter after the water of drum mixes with the saturation water in drum, enter vaporizer along the falling tube below drum and absorb heat and start to steam, normally only become vapour with a part of water, so what flow in vaporizer is steam water interface.Steam water interface leaves vaporizer and enters top drum by the second gas-liquid separator separates, and water is fallen water space in drum and entered falling tube and continue heat absorption and steam, and steam enters superheater from drum top, absorbs heat and makes saturated vapour become superheated vapor.The superheated vapor produced enters turbine unit and generator set generates electricity.Steam turbine generator set has the advantages such as volume is little, lightweight, convenient transportation, structure are simple, Security is high, fitting operation is easy to maintenance.
Under the effect of blower fan, raw coke oven gas from gas using residual heat road successively through superheater, vaporizer, the outlet of economizer enters pneumatic trough, high pressure aqua ammonia spray equipment is provided with in pneumatic trough, raw coke oven gas cools in pneumatic trough, cyclic ammonia water is sprayed strongly by the shower nozzle of high pressure aqua ammonia spray equipment under pressure, when the ammoniacal liquor of fine mist fully contacts with coal gas, because raw gas temperature is higher, so a large amount of sensible heat released by raw coke oven gas, ammoniacal liquor evaporates in a large number, carry out heat transfer and mass transport process rapidly, when coal gas cools in pneumatic trough, heat of releasing is mainly used in ammoniacal liquor evaporation (accounting for 75 ~ 80%), remaining heat dissipation heats up in ammoniacal liquor the radiation loss (accounting for about 10%) of (accounting for 10 ~ 15%) and pneumatic trough.By above-mentioned cooling procedure, gas temperature is down to 82 ~ 86 DEG C by 500 DEG C, there is the tar of about 60% to cool down simultaneously, the coal gas of cooling water and tar ammonia together flow to the first gas-liquid separator along gas pipe line, gas enters primary cooler by separator top and cools further, and tar ammonia enters mechanization groove through separator.
Power generation system of the present invention can be connected with several coke oven coke oven uprising tube simultaneously, improves the generating capacity of generator set further.
Have than more complete winer construction in overall system design in the present embodiment; automatic adjustment; interlock protection and heat power engineering signal warning device have perfect supervisory system; electric room arranges DCS rack; power cabinets etc., its automatization level completes the monitoring of the whole thermal parameters under normal operation work and the stop in emergency operation of some capital equipments at accident condition by enabling operator in control room.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. utilize a power generation system for waste heat of coke oven crude gas, comprise gas using residual heat road, exhaust heat boiler, steam turbine set and generator set, it is characterized in that: described gas using residual heat road, described exhaust heat boiler, described steam turbine set are connected successively with described generator set; Described gas using residual heat road is connected with coke oven coke oven uprising tube road, superheater, vaporizer and economizer is set gradually by raw coke oven gas circulating direction in described exhaust heat boiler, economizer exports with softened water pump and is connected, superheater is connected with steam turbine set by steam line, and described exhaust heat boiler lower end is connected with pneumatic trough; High pressure aqua ammonia spray equipment is provided with in described pneumatic trough; Pneumatic trough lower end is connected with the first gas-liquid separator, and the gas pipeline end of the first gas-liquid separator is connected with blower fan, and the fluid pipeline end of the first gas-liquid separator is provided with the mechanization groove of the tar for collecting ammoniacal liquor and raw coke oven gas cooling generation.
2. a kind of power generation system utilizing waste heat of coke oven crude gas according to claim 1, is characterized in that: the heating surface bank of described superheater, vaporizer and economizer is finned-tube bundle.
3. a kind of power generation system utilizing waste heat of coke oven crude gas according to claim 2, is characterized in that: the end of described evaporator heat transfer tube bank is connected with the second gas-liquid separator.
4. a kind of power generation system utilizing waste heat of coke oven crude gas according to claim 1, is characterized in that: described exhaust heat boiler is also connected with the drain pipe be connected with drainage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310061738.4A CN103147807B (en) | 2013-02-27 | 2013-02-27 | Power generation system using waste heat of coke oven crude gas |
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| CN201310061738.4A CN103147807B (en) | 2013-02-27 | 2013-02-27 | Power generation system using waste heat of coke oven crude gas |
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| CN103147807A CN103147807A (en) | 2013-06-12 |
| CN103147807B true CN103147807B (en) | 2015-01-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727872A (en) * | 2015-03-25 | 2015-06-24 | 山东钢铁股份有限公司 | Coke oven gas waste heat power generation system |
| CN111578247A (en) * | 2020-05-06 | 2020-08-25 | 武汉方特工业设备技术有限公司 | Waste heat recovery system |
| CN112524718A (en) * | 2020-12-01 | 2021-03-19 | 西安西热控制技术有限公司 | Automatic cooling system for thermal power plant and cooling method thereof |
Citations (5)
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| CN101029246A (en) * | 2006-03-02 | 2007-09-05 | 攀枝花新钢钒股份有限公司 | Method for separating tar from ammonia water by cooling coal oven dithio-gas |
| CN201772424U (en) * | 2009-12-21 | 2011-03-23 | 中国船舶重工集团公司第七�三研究所 | Coke oven gas primary-cooling waste-heat boiler |
| CN102287800A (en) * | 2011-06-10 | 2011-12-21 | 邢同春 | System for producing steam by utilizing coke oven to heat waste gas and waste heat |
| 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 |
| CN202467949U (en) * | 2012-02-29 | 2012-10-03 | 天壕节能科技股份有限公司 | Coke oven smoke waste-heat power generation system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57195806A (en) * | 1981-05-26 | 1982-12-01 | Osaka Gas Co Ltd | Energy collective device of dry distillation coke oven gas |
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- 2013-02-27 CN CN201310061738.4A patent/CN103147807B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101029246A (en) * | 2006-03-02 | 2007-09-05 | 攀枝花新钢钒股份有限公司 | Method for separating tar from ammonia water by cooling coal oven dithio-gas |
| CN201772424U (en) * | 2009-12-21 | 2011-03-23 | 中国船舶重工集团公司第七�三研究所 | Coke oven gas primary-cooling waste-heat boiler |
| CN102287800A (en) * | 2011-06-10 | 2011-12-21 | 邢同春 | System for producing steam by utilizing coke oven to heat waste gas and waste heat |
| 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 |
| CN202467949U (en) * | 2012-02-29 | 2012-10-03 | 天壕节能科技股份有限公司 | Coke oven smoke waste-heat power generation system |
Non-Patent Citations (1)
| Title |
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| JP昭57-195806A 1982.12.01 * |
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