CN202770226U - A device capable of reclaiming metallurgical waste heat gas afterheat and generating electricity efficiently - Google Patents
A device capable of reclaiming metallurgical waste heat gas afterheat and generating electricity efficiently Download PDFInfo
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- CN202770226U CN202770226U CN2011204323916U CN201120432391U CN202770226U CN 202770226 U CN202770226 U CN 202770226U CN 2011204323916 U CN2011204323916 U CN 2011204323916U CN 201120432391 U CN201120432391 U CN 201120432391U CN 202770226 U CN202770226 U CN 202770226U
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- waste heat
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- heat exchanger
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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 utility model discloses a device capable of reclaiming metallurgical waste heat gas afterheat and generating electricity efficiently. The device comprises a heat exchanger, an expansion machine, a condenser, a buffer tank and a cycling working medium booster pump. The cycling working medium booster pump, the heat exchanger, the expansion machine, the condenser and the buffer tank are connected in series through pipelines, and the buffer tank is connected with the cycling working medium booster pump through a pipeline. A low-temperature working medium absorbs heat in the heat exchanger, applies work in the expansion machine, is cooled in the condenser after applying work, and is delivered to the heat exchanger through the cycling working medium booster pump and thus absorbs heat again. Cyclic operation is thus realized. The device can fully reclaim mid-low-temperature waste heat gas afterheat that cannot be reclaimed easily through Rankine cycle and generate power efficiently, with the generation efficiency being 2-3 times the general Rankine cycle generation efficiency. The device is characterized by simple structure, reliable operation and remarkable economic and social benefits.
Description
Technical field
The utility model relates to the equipment of low temperature waste gas exhaust heat recovery power generation in the metallurgical system, belongs to the energy-conserving and emission-cutting technology field.Be specifically related to a kind of technology that adopts organic Rankine circulation and reclaim the waste heat of low temperature waste gas in the metallurgical system, carry out the technology and device of efficiency power generation.
Background technology
At present, in the metallurgical system production process, the waste heat gas heat of sintering circuit central cooler accounts for 32% of sintering circuit total energy consumption, and the temperature of waste heat gas is about 200～420 ℃; The flue gas heat that the step-by-step movement heater for rolling steel is discharged account for its system total energy consumption 20～30%, the temperature of flue gas is about 220～320 ℃; Blast funnace hot blast stove is discharged fume afterheat and is accounted for 15%～20% of its total energy consumption, and flue-gas temperature is about 180～250 ℃; The heat of the flue gas that coke oven is discharged accounts for 14～18% of coke oven heating energy consumption, and flue-gas temperature is about 180～240 ℃.Above these waste heat gas only have the waste gas of sintering circuit central cooler to obtain the part utilization, the gas of one section of sintering circular-cooler high temperature and two sections, and temperature is about 300～420 ℃, is used to the production steam-electric power or supplies the user outward.Other waste heat gas is so not only wasted energy, and environment is produced thermal pollution because temperature lower (as adopting at present general Rankine cycle generating, then uneconomical) all effluxes now.
Summary of the invention
The purpose of this utility model: be exactly the waste heat for abundant and this part waste heat gas of economic utilization, a kind of equipment of metallurgical waste heat gas waste heat recovery efficiency power generation is provided.The utility model can not only fully reduce the exhaust gas temperature of waste heat gas, maximum its waste heat of recovery, and can also take full advantage of these heat high efficiency generatings, thus obtain significant economic benefit and social benefit.
Technical scheme: technique and the equipment of metallurgical waste heat gas waste heat recovery efficiency power generation of the present utility model, comprise heat exchanger, decompressor, condenser, surge tank, the cycle fluid force (forcing) pump, heat exchanger is used for cycle fluid and waste heat gas carries out heat exchange, be connected by cryogenic piping between the cycle fluid import of cycle fluid force (forcing) pump outlet and heat exchanger, be connected by high-temperature pipe between the outlet of heat exchanger cycle fluid and the import of decompressor, the outlet of decompressor links to each other by pipeline with the import of condenser cycle fluid, the outlet of condenser cycle fluid links to each other by pipeline with the import of surge tank, and the outlet of surge tank links to each other by pipeline with the import of cycle fluid force (forcing) pump.The cycle fluid force (forcing) pump is sent into heat exchanger by pipeline after the cryogenic liquid cycle fluid in the surge tank is pressurizeed, the cryogenic liquid cycle fluid carries out heat exchange in heat exchanger with from the waste heat gas of metallurgical system, absorb the waste heat in the waste gas, become high-temperature gas, send into the decompressor acting of expanding by pipeline, the generating of drive generator, the cycle fluid of doing merit becomes the gas of low-temp low-pressure, enter condenser and cooling medium and carry out heat exchange, cycle fluid becomes the cycle fluid of cryogenic liquid after cooling, then send into surge tank and recycle, cooling medium can be air or cooling water.If cooling medium adopts cooling water, then should join cooling tower; If cooling medium adopts air, then condenser should adopt the air cooler structure.For the place of lack of water, cooling medium should adopt air when using this technique and equipment; For the Yangtze river basin or on the south the place, use this skill and the optional water of when equipment cooling medium.
Cycle fluid described in the utility model is the pure working medium of octafluorocyclobutane, pentafluoropropane, 3-pentafluorobutane, HFC-236fa, perfluorinated butane, perflenapent, R123, R124, R141B, butane, iso-butane, cyclobutane, pentane, isopentane or neopentane, described cycle fluid satisfies country to the requirement of environment, and ozone depletion value is zero or very little.
Cycle fluid described in the utility model is perfluorinated butane and butane mixed working fluid, perflenapent and pentane mixed working fluid or octafluorocyclobutane and cyclobutane mixed working fluid.
Perfluorinated butane described in the utility model and butane mixed working fluid account for 5%～95% of total amount by the weight of perfluorinated butane and are configured, described perflenapent and pentane mixed working fluid account for 5%～95% of total amount by the weight of perflenapent and are configured, and described octafluorocyclobutane and cyclobutane mixed working fluid account for 5%～95% of total amount by the weight of octafluorocyclobutane and be configured.
The utility model is applicable to reclaim 120～350 ℃ middle low temperature waste gas waste heat.
Decompressor described in the utility model is turbo-expander or screw expander.
The utility model beneficial effect is:
1) temperature of waste heat gas can be dropped to below 80 ℃, reclaim the smoke exhaust heat more than 50%;
2) the recovery heat can be converted to electric energy more than 25%, compare with common Rankine cycle steam-electric power and can improve generated energy 50%～200%.
Description of drawings
Fig. 1 is the equipment of the metallurgical waste heat gas waste heat recovery efficiency power generation of the utility model embodiment 1:
1, chimney 2, heat exchanger waste discharge tracheae 3, heat exchanger 4, advance heat exchanger flue gas leading 5, high-temperature pipe 6, decompressor 7, generator 8, condenser 9, cooling tower 10, surge tank 11, cycle fluid force (forcing) pump 12, cryogenic piping
Fig. 2 is the equipment of the metallurgical waste heat gas waste heat recovery efficiency power generation of the utility model embodiment 2:
1, chimney 2, heat exchanger waste discharge tracheae 3, heat exchanger 4, advance heat exchanger flue gas leading 5, high-temperature pipe 6, decompressor 7, generator 8, condensing air cooler 9, cooling blower 10, surge tank 11, cycle fluid force (forcing) pump 12, cryogenic piping
The specific embodiment
Below in conjunction with Fig. 1 the utility model is further described.
Fig. 1 is the change system figure of a kind of metallurgical waste heat gas waste heat recovery efficiency power generation of embodiment 1
Fig. 2 is the change system figure of a kind of metallurgical waste heat gas waste heat recovery efficiency power generation of embodiment 2
As shown in drawings, after cycle fluid force (forcing) pump (11) pressurizes the cryogenic liquid cycle fluid in the surge tank (10), in the heat exchanger (3) of sending into by cryogenic piping (12), in heat exchanger (3) with carry out heat exchange from the hot waste gas of metallurgical system after, hot waste gas is recycled the working medium cooling, become low temperature waste gas through heat exchanger waste discharge tracheae (2) and chimney (1) discharging, after the cryogenic liquid cycle fluid is heated by hot waste gas, become the high-temperature gas cycle fluid, send into decompressor (6) by high-temperature pipe (5), do work, drive generator (7) generating, the circulatory mediator of finishing merit becomes the gas of low-pressure low-temperature, sends into condenser (8) and is cooled after the medium cooling, becomes cryogenic liquid and sends into surge tank and recycle.
Embodiment 1: such as Fig. 1 (adopting HFC-236fa R236EA is that cycle fluid, cooling medium are water, and hydromining cools off with cooling tower)
Three sections EGTs of certain steel works sintering operation central cooler are 230～250 ℃, and flow is 45 myriametres
3/ hour, adopt the organic Rankine circulation to reclaim the heat of heat waste heat gas, cycle fluid liquid in the surge tank is through the pressurization of cycle fluid pump, send in the heat exchanger by pipeline, after heat exchanger and the heat exchange of sintering hot waste gas, become the gas of high temperature, send into decompressor by pipeline, import cycle fluid pressure at decompressor is 2Mpa, and temperature is 200 ℃, and the cycle fluid flow is 310 tons/hour, the acting of in decompressor, expanding of high-temperature gas cycle fluid, the generating of drive generator, when the cold in-water temperature of condenser was 25 ℃, power output was 7500KW, did the discharge decompressor low-temperature circulating working medium after the merit, after the condenser cooling, become cryogenic liquid, flow into surge tank, continue to recycle; The sintering hot waste gas becomes temperature after being recycled the working medium cooling in the heat exchanger be that 80 ℃ of low temperature waste gas are emptying; The recirculated cooling water that is used for cooling working medium at condenser by the cooling tower cooling after, then recycle.The generated output power of organic Rankine circulation of the present utility model is 7500KW, and as adopting the Rankine cycle steam generating system, this part hot waste gas only can be exported the 3650KW electric energy.Generating efficiency of the present utility model is higher by 106% than Rankine cycle steam generating system.
Embodiment 2: such as Fig. 2 (the employing butane is that cycle fluid, cooling medium adopt air, and condenser adopts air cooler, and the cancellation cooling tower increases cooling blower)
The stepped heating EGT of certain Rolling Steel in Steel Works operation is 320～340 ℃, and flow is 8 myriametres
3/ hour, adopt the organic Rankine circulation to reclaim the heat of heat waste heat gas, cycle fluid liquid in the surge tank is through the pressurization of cycle fluid pump, send in the heat exchanger by pipeline, after heat exchanger and the heat exchange of sintering hot waste gas, become the gas of high temperature, send into decompressor by pipeline, import cycle fluid pressure at decompressor is 2Mpa, and temperature is 250 ℃, and the cycle fluid flow is 32 tons/hour, the acting of in decompressor, expanding of high-temperature gas cycle fluid, the generating of drive generator, when the intake air temperature of air cooler was 25 ℃, power output was 2300KW, did the discharge decompressor low-temperature circulating working medium after the merit, after empty condenser cooling, become cryogenic liquid, flow into surge tank, continue to recycle; The sintering hot waste gas becomes temperature after being recycled the working medium cooling in the heat exchanger be that 100 ℃ of (for fear of smoke condensation, guaranteeing that exhaust gas temperature is greater than 90 ℃) low temperature waste gas are emptying; The cooling medium of air cooler is air, adopts the cooling of axial flow blower exhausting.As adopting the Rankine cycle steam generating system, this part hot waste gas only can be exported the 1100KW electric energy.Generating efficiency of the present utility model is higher by 130% than Rankine cycle steam generating system.
The above only is preferred embodiment of the present utility model; be noted that for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. the equipment of a metallurgical waste heat gas waste heat recovery efficiency power generation, it is characterized in that: comprise heat exchanger (3), decompressor (6), condenser (8), surge tank (10), cycle fluid force (forcing) pump (11), described heat exchanger (3) is used for cycle fluid and waste heat gas carries out heat exchange, establish cryogenic piping (12) between the cycle fluid import of described cycle fluid force (forcing) pump outlet and heat exchanger (3), establish high-temperature pipe (5) between the outlet of heat exchanger (3) cycle fluid and the import of decompressor (6), the outlet of described decompressor (6) links to each other by pipeline with the import of condenser (8) cycle fluid, the outlet of condenser (8) cycle fluid links to each other by pipeline with the import of surge tank (10), and the outlet of surge tank (10) links to each other by pipeline with the import of cycle fluid force (forcing) pump (11).
2. the equipment of metallurgical waste heat gas waste heat recovery efficiency power generation according to claim 1, it is characterized in that: described cycle fluid is the pure working medium of octafluorocyclobutane, pentafluoropropane, 3-pentafluorobutane, HFC-236fa, perfluorinated butane, perflenapent, R123, R124, R141B, butane, iso-butane, cyclobutane, pentane, isopentane or neopentane.
3. the equipment of metallurgical waste heat gas waste heat recovery efficiency power generation according to claim 1, it is characterized in that: described decompressor (6) is turbo-expander or screw expander.
4. the equipment of metallurgical waste heat gas waste heat recovery efficiency power generation according to claim 1, it is characterized in that: described heat exchanger (3) is evaporimeter or waste heat boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204323916U CN202770226U (en) | 2011-11-04 | 2011-11-04 | A device capable of reclaiming metallurgical waste heat gas afterheat and generating electricity efficiently |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011204323916U CN202770226U (en) | 2011-11-04 | 2011-11-04 | A device capable of reclaiming metallurgical waste heat gas afterheat and generating electricity efficiently |
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| CN202770226U true CN202770226U (en) | 2013-03-06 |
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| CN2011204323916U Expired - Fee Related CN202770226U (en) | 2011-11-04 | 2011-11-04 | A device capable of reclaiming metallurgical waste heat gas afterheat and generating electricity efficiently |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435077A (en) * | 2011-11-04 | 2012-05-02 | 孙慕文 | Process and device for waste heat recycling and efficiency power generation of metallurgy waste heat gas |
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2011
- 2011-11-04 CN CN2011204323916U patent/CN202770226U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435077A (en) * | 2011-11-04 | 2012-05-02 | 孙慕文 | Process and device for waste heat recycling and efficiency power generation of metallurgy waste heat gas |
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| 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: 20130306 Termination date: 20141104 |
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| EXPY | Termination of patent right or utility model |