CN102966936A - Double-effect and phase change waste heat recovering system for recovering low-grade waste gas waste heat - Google Patents
Double-effect and phase change waste heat recovering system for recovering low-grade waste gas waste heat Download PDFInfo
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- CN102966936A CN102966936A CN2012104857274A CN201210485727A CN102966936A CN 102966936 A CN102966936 A CN 102966936A CN 2012104857274 A CN2012104857274 A CN 2012104857274A CN 201210485727 A CN201210485727 A CN 201210485727A CN 102966936 A CN102966936 A CN 102966936A
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Abstract
The invention relates to a double-effect and phase change waste heat recovering system for recovering low-grade waste gas waste heat. The double-effect and phase change waste heat recovering system comprises a flue, a convection heat exchanger, a phase-change heat exchanger, a phase-change heat exchange steam drum, an ascending pipe, a descending pipe, a connecting pipe, a steam outlet pipe of the phase-change heat exchange steam drum, a water outlet pipe of the phase-change heat exchange steam drum and a diversion pipe, wherein the convection heat exchanger and the phase-change heat exchanger are arranged in the flue; a flue gas outlet, the phase-change heat exchanger, the convection heat exchanger and a flue gas outlet are sequentially arrayed; the convection heat exchanger comprises a first inlet and a first outlet; the phase-change heat exchanger comprises a second inlet and a second outlet; the steam outlet pipe of the of the phase-change heat exchange steam drum and the water outlet pipe of the of the phase-change heat exchange steam drum are connected onto the of the phase-change heat exchange steam drum; one end of the diversion pipe is connected onto a water outlet pipe of the phase-change heat exchanger; and the other end of the diversion pipe is connected with the descending pipe. The double-effect and phase change waste heat recovering system disclosed by the invention has the advantages of reasonable design, better control performance, better adaptability and high heat exchange efficiency and strength; and the double-effect technical requirements of generating hot water and steam can be simultaneously met and the recycling of the low-grade waste gas waste heat is facilitated.
Description
Technical field
The present invention relates to low-grade waste gas afterheat recovery system, particularly a kind of economic benefits and social benefits phase transformation residual neat recovering system of low-grade waste gas residual heat recovery.
Background technology
At present, the efficiency of energy utilization of China is 33%, than low about 10 percentage points of developed country.Electric power, iron and steel, coloured, petrochemical industry, building materials, chemical industry, light industry, 8 industry major products of weaving specific energy consumption average specific international most advanced level are high by 40%.When energy constraint contradiction highlighted, efficiency of energy utilization was compared with advanced international standard and is had a larger gap.
Tradition " energy consumption rich and influential family " in the past decennary energy consumption descends year by year, energy conservation has obtained significant achievement, but still have some problems, be faced with formidable challenges in next step development, wherein a very important aspect is exactly the problem of utilizing of residual heat and energy.
Therefore, those skilled in the art has done the recycling that these residual heat and energies are carried out in a large amount of work, but still has defective in the engineering that reclaims: 1) some residual heat and energy grade is lower, bad recovery; 2) residual heat and energy recovery product is single; 3) be difficult to adapt to the variations such as fuel, load, technological parameter; 4) lack satisfied energy-saving investment return rate.As open day be on April 27th, 2011, publication number is a kind of waste gas afterheat recovery system of CN102032804A, this waste gas afterheat recovery system comprises heat exchanger, chimney and waste-heat recoverer, the air inlet of waste-heat recoverer and gas outlet communicate with chimney; Heat exchanger comprises the first water inlet, the first delivery port, the second water inlet and the second delivery port, and wherein the first water inlet utilizes respectively the pipeline of heat exchanger inside to communicate with the first delivery port, the second water inlet with the second delivery port; Communicate by water inlet pipe between the delivery port of the first water inlet and waste-heat recoverer, be disposed with water intaking valve and the first control valve on the water inlet pipe, communicate by outlet pipe between the water inlet of the first delivery port and waste-heat recoverer, be disposed with outlet valve, water pump and the second control valve on the outlet pipe, also communicate by the water pipe of crossing that is arranged at the heat exchanger outside between the first water inlet and the first delivery port, cross on the water pipe and be provided with the 3rd control valve.Above-mentioned waste gas afterheat recovery system uses single heat exchanger, and heat exchange efficiency and intensity are not high; And reclaiming available product is water, and it is single that residual heat and energy reclaims product; Though be provided with valve, there are not the survey tools such as thermometer, flowmeter, pressure gauge, control performance is poor, and bad adaptability is difficult to adapt to the variations such as fuel, load, technological parameter.These defectives are restricting carrying out of energy conservation, become to improve the difficult problem that heat recovery efficient needs to be resolved hurrily.
Summary of the invention
The object of the invention is to overcome above shortcomings in the prior art, and provide a kind of reasonable in design, can satisfy simultaneously the economic benefits and social benefits specification requirement that produces hot water and steam, and control performance is better, adaptability is better, heat exchange efficiency and intensity are high, the economic benefits and social benefits phase transformation residual neat recovering system that the low-grade waste gas residual heat of the difficult low-grade waste gas residual heat that utilizes of recoverable reclaims.
The present invention addresses the above problem the technical scheme that adopts: the economic benefits and social benefits phase transformation residual neat recovering system that this low-grade waste gas residual heat reclaims, comprise flue, convection recuperator, phase-change heat-exchanger, phase-change heat-exchange drum, tedge, down-comer, tube connector, phase-change heat-exchange drum steam outlet pipe, phase-change heat-exchange drum outlet pipe and isocon, one end of described flue is smoke inlet, the other end of flue is exhanst gas outlet, described convection recuperator and phase-change heat-exchanger place in the flue, and smoke inlet, phase-change heat-exchanger, convection recuperator and exhanst gas outlet are arranged in order; Described convection recuperator comprises the first entrance and the first outlet, and described the first entrance is connected with an end of described tube connector, and an end of described heat exchanger outlet pipe is connected with the first outlet, and the other end of this heat exchanger outlet pipe is connected with the phase-change heat-exchange drum; Described phase-change heat-exchanger comprises the second entrance and the second outlet, one end of described tedge is connected in the second outlet, the other end of this tedge is connected with the phase-change heat-exchange drum, and an end of described down-comer is connected on the second entrance, and the other end of this down-comer is connected with the phase-change heat-exchange drum; Described phase-change heat-exchange drum steam outlet pipe and phase-change heat-exchange drum outlet pipe are connected on the phase-change heat-exchange drum; One end of described isocon is connected on the heat exchanger outlet pipe, and the other end of this isocon is connected with down-comer.Can satisfy simultaneously the economic benefits and social benefits specification requirement that produces hot water and steam, heat exchange efficiency and intensity have obtained significant raising, can greatly dwindle size of heat exchanger, save heat exchanger materials, save the heat exchanger cost, realize the waste gas residual heat recycling.In the time of needs steam, do not flow in the phase-change heat-exchange drum through the pre-warmed demineralized water of convection recuperator, directly flow in the phase-change heat-exchanger through down-comer, steam is collected by the phase-change heat-exchange drum, then enters external system.
Be provided with control valve on the tube connector of the present invention No. one.Can regulate the flow of the demineralized water of the system of entering.
Be provided with No. two control valves and a flowmeter on the heat exchanger outlet pipe of the present invention, described No. two control valves and a flowmeter are between phase-change heat-exchange drum and isocon, and this flowmeter is between phase-change heat-exchange drum and No. two control valves; Be provided with No. four control valves and No. two flowmeters on the described isocon, described No. four control valves are between No. two flowmeters and down-comer.Control performance is better, can produce steam and the hot water of steadiness parameter, can regulate according to the thermal source working conditions change, and adaptability is better.
Be provided with control valve No. three on the phase-change heat-exchange drum steam outlet pipe of the present invention.Can control the flow of steam, regulate the pressure in the phase-change heat-exchange drum.
Be provided with No. one thermometer on the heat exchanger outlet pipe of the present invention, a described thermometer is between flowmeter and phase-change heat-exchange drum; Be provided with thermometer No. two on the described phase-change heat-exchange drum outlet pipe; Be provided with thermometer No. three on the described phase-change heat-exchange drum steam outlet pipe, phase-change heat-exchange drum, No. three control valves and No. three thermometers are arranged in order; Be provided with thermometer on the described tedge No. four.Can monitor respectively the temperature of each several part liquid or steam, control performance is better.
Be provided with pressure gauge on the phase-change heat-exchange drum of the present invention.Can monitor the force value in the phase-change heat-exchange drum, be convenient to timely adjustment.
The present invention compared with prior art has the following advantages and effect: reasonable in design, can satisfy the economic benefits and social benefits specification requirement that produces hot water and steam simultaneously, and control performance is better, adaptability is better, and heat exchange efficiency and intensity are high, are conducive to recycle low-grade waste gas residual heat.
Description of drawings
Fig. 1 is structural representation of the present invention.
Label declaration: flue 1, phase-change heat-exchanger 2, convection recuperator 3, tube connector 4, a control valve 5, heat exchanger outlet pipe 6, No. two control valves 7, a flowmeter 8, a thermometer 9, phase-change heat-exchange drum outlet pipe 10, No. two thermometers 11, phase-change heat-exchange drum steam outlet pipe 12, No. three thermometers 13, No. three control valves 14, pressure gauge 15, phase-change heat-exchange drum 16, tedge 17, No. four thermometers 18, down-comer 19, No. four control valves 20, No. two flowmeters 21, isocon 22, the first entrance 23, the first outlet 24, the second entrance 25, the second outlet 26, smoke inlet 27 and exhanst gas outlet 28.
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing and by embodiment, and following examples are explanation of the invention and the present invention is not limited to following examples.
Referring to Fig. 1, present embodiment comprises flue 1, convection recuperator 3, phase-change heat-exchanger 2, phase-change heat-exchange drum 16, tedge 17, down-comer 19, tube connector 4, phase-change heat-exchange drum steam outlet pipe 12, phase-change heat-exchange drum outlet pipe 10 and isocon 22.
One end of flue 1 is smoke inlet 27, and the other end of flue 2 is exhanst gas outlet 28, and convection recuperator 3 and phase-change heat-exchanger 2 place in the flue 1, and smoke inlet 27, phase-change heat-exchanger 2, convection recuperator 3 and exhanst gas outlet 28 are arranged in order.
Phase-change heat-exchanger 2 comprises the second entrance 25 and the second outlet 26, one end of tedge 17 is connected in the second outlet 26, the other end of this tedge 17 is connected with phase-change heat-exchange drum 16, one end of down-comer 19 is connected on the second entrance 25, and the other end of this down-comer 19 is connected with phase-change heat-exchange drum 16.
Phase-change heat-exchange drum steam outlet pipe 12 and phase-change heat-exchange drum outlet pipe 10 are connected on the phase-change heat-exchange drum 16.
One end of isocon 22 is connected on the heat exchanger outlet pipe 6, and the other end of this isocon 22 is connected with down-comer 19.
Be provided with control valve 5 on the tube connector 4 No. one; Be provided with No. two control valves 7 and a flowmeter 8 on the heat exchanger outlet pipe 6, described No. two control valves 7 and a flowmeter 8 are between phase-change heat-exchange drum 16 and isocon 22, and this flowmeter 8 is between phase-change heat-exchange drum 16 and No. two control valves 7; Be provided with No. four control valves 20 and No. two flowmeters 21 on the isocon 22, described No. four control valves 20 are between No. two flowmeters 21 and down-comer 19; Be provided with No. three control valve 14 on the phase-change heat-exchange drum steam outlet pipe 12.
Be provided with thermometer 9 on the heat exchanger outlet pipe 6 No. one, a described thermometer 9 is between flowmeter 8 and phase-change heat-exchange drum 16; Be provided with thermometer 11 No. two on the described phase-change heat-exchange drum outlet pipe 10; Be provided with thermometer 13 No. three on the described phase-change heat-exchange drum steam outlet pipe 12, phase-change heat-exchange drum 16, No. three control valves 14 and No. three thermometers 13 are arranged in order; Be provided with No. four thermometer 18 on the described tedge 17.
Be provided with pressure gauge 15 on the phase-change heat-exchange drum 16.
Demineralized water flows into 3 li of convection recuperators and flue gas heat exchange through tube connector 4, and demineralized water is heated to uniform temperature, and flue-gas temperature further reduces.
Demineralized water part through preheating flows into phase-change heat-exchange drum 16, a part flows into phase-change heat-exchanger 2 through down-comer 19, and at 2 li of phase-change heat-exchangers and flue gas heat exchange, demineralized water is heated the generation saturated vapor, enter phase-change heat-exchange drum 16 through tedge 17, flue-gas temperature reduces.
The saturated vapor that enters phase-change heat-exchange drum 16 through tedge 17 and the demineralized water heat exchange through convection recuperator 3 preheatings, the saturated vapor cooling condenses into aqueous water, through down-comer 19 backflow phase-change heat-exchangers 2, be further heated to higher temperature through the preheating demineralized water, flow into external system through phase-change heat-exchange drum outlet pipe 10.
When needs steam, demineralized water through convection recuperator 3 preheatings does not flow into phase-change heat-exchange drum 16, all flow into phase-change heat-exchanger 2 and flue gas heat exchange through down-comer 19, demineralized water is heated generation steam, enter phase-change heat-exchange drum 16 through tedge 17, collected by phase-change heat-exchange drum 16, then enter external system through phase-change heat-exchange drum steam outlet pipe 12, phase-change heat-exchange drum 16 is equivalent to a pressure vessel at this moment.
In addition, need to prove, the specific embodiment described in this specification, the shape of its parts and components, institute's title of being named etc. can be different, and the above content described in this specification only is to structure example of the present invention explanation.Allly conceive equivalence variation or the simple change that described structure, feature and principle are done according to patent of the present invention, be included in the protection domain of patent of the present invention.Those skilled in the art can make various modifications or replenish or adopt similar mode to substitute described specific embodiment; only otherwise depart from structure of the present invention or surmount this scope as defined in the claims, all should belong to protection scope of the present invention.
Claims (7)
1. economic benefits and social benefits phase transformation residual neat recovering system that low-grade waste gas residual heat reclaims, it is characterized in that: comprise flue, convection recuperator, phase-change heat-exchanger, phase-change heat-exchange drum, tedge, down-comer, tube connector, phase-change heat-exchange drum steam outlet pipe, phase-change heat-exchange drum outlet pipe and isocon, one end of described flue is smoke inlet, the other end of flue is exhanst gas outlet, described convection recuperator and phase-change heat-exchanger place in the flue, and smoke inlet, phase-change heat-exchanger, convection recuperator and exhanst gas outlet are arranged in order; Described convection recuperator comprises the first entrance and the first outlet, and described the first entrance is connected with an end of described tube connector, and an end of described heat exchanger outlet pipe is connected with the first outlet, and the other end of this heat exchanger outlet pipe is connected with the phase-change heat-exchange drum; Described phase-change heat-exchanger comprises the second entrance and the second outlet, one end of described tedge is connected in the second outlet, the other end of this tedge is connected with the phase-change heat-exchange drum, and an end of described down-comer is connected on the second entrance, and the other end of this down-comer is connected with the phase-change heat-exchange drum; Described phase-change heat-exchange drum steam outlet pipe and phase-change heat-exchange drum outlet pipe are connected on the phase-change heat-exchange drum; One end of described isocon is connected on the heat exchanger outlet pipe, and the other end of this isocon is connected with down-comer.
2. the economic benefits and social benefits phase transformation residual neat recovering system of a kind of low-grade waste gas residual heat recovery according to claim 1 is characterized in that: be provided with control valve on the described tube connector No. one.
3. the economic benefits and social benefits phase transformation residual neat recovering system that reclaims of a kind of low-grade waste gas residual heat according to claim 1, it is characterized in that: be provided with No. two control valves and a flowmeter on the described heat exchanger outlet pipe, described No. two control valves and a flowmeter are between phase-change heat-exchange drum and isocon, and this flowmeter is between phase-change heat-exchange drum and No. two control valves.
4. the economic benefits and social benefits phase transformation residual neat recovering system that reclaims of a kind of low-grade waste gas residual heat according to claim 1, it is characterized in that: be provided with No. four control valves and No. two flowmeters on the described isocon, described No. four control valves are between No. two flowmeters and down-comer.
5. the economic benefits and social benefits phase transformation residual neat recovering system of a kind of low-grade waste gas residual heat recovery according to claim 1 is characterized in that: be provided with control valve No. three on the described phase-change heat-exchange drum steam outlet pipe.
6. the economic benefits and social benefits phase transformation residual neat recovering system that reclaims of a kind of low-grade waste gas residual heat according to claim 1, it is characterized in that: be provided with No. one thermometer on the described heat exchanger outlet pipe, a described thermometer is between flowmeter and phase-change heat-exchange drum; Be provided with thermometer No. two on the described phase-change heat-exchange drum outlet pipe; Be provided with thermometer No. three on the described phase-change heat-exchange drum steam outlet pipe, phase-change heat-exchange drum, No. three control valves and No. three thermometers are arranged in order; Be provided with thermometer on the described tedge No. four.
7. the economic benefits and social benefits phase transformation residual neat recovering system of a kind of low-grade waste gas residual heat recovery according to claim 1 is characterized in that: be provided with pressure gauge on the described phase-change heat-exchange drum.
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| CN201210485727.4A CN102966936B (en) | 2012-11-26 | 2012-11-26 | Double-effect and phase change waste heat recovering system for recovering low-grade waste gas waste heat |
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| CN201210485727.4A CN102966936B (en) | 2012-11-26 | 2012-11-26 | Double-effect and phase change waste heat recovering system for recovering low-grade waste gas waste heat |
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| CN102966936B CN102966936B (en) | 2014-11-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090854A (en) * | 2016-08-09 | 2016-11-09 | 安徽华尔泰化工股份有限公司 | A kind of vapour-recovery unit for salt melting system |
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| CN106090854A (en) * | 2016-08-09 | 2016-11-09 | 安徽华尔泰化工股份有限公司 | A kind of vapour-recovery unit for salt melting system |
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Owner name: HANGZHOU HUADIAN ENERGY ENGINEERING CO., LTD. Free format text: FORMER OWNER: HANGZHOU STATE POWER MACHINERY RESEARCH + DESIGN INSTITUTE CO., LTD. Effective date: 20141115 |
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Effective date of registration: 20141115 Address after: Hangzhou City, Zhejiang Province, Hangzhou West Lake science and Technology Park 310030 Park Road, No. 10 Patentee after: Hangzhou Huadian Energy Engineering Co., Ltd. Address before: Hangzhou City, Zhejiang Province, 310030 Xihu District science and Technology Park of West Lake Park Road, No. 10 Patentee before: Hangzhou State Power Machinery Design Institute Co., Ltd. |
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Address after: Hangzhou City, Zhejiang Province, Xihu District West Lake science and Technology Park 310030 Park Road, No. 10 Patentee after: Hangzhou Huadian Energy Engineering Co., Ltd. Address before: Hangzhou City, Zhejiang Province, Hangzhou West Lake science and Technology Park 310030 Park Road, No. 10 Patentee before: Hangzhou Huadian Energy Engineering Co., Ltd. |