CN102966936B - 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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- CN102966936B CN102966936B CN201210485727.4A CN201210485727A CN102966936B CN 102966936 B CN102966936 B CN 102966936B CN 201210485727 A CN201210485727 A CN 201210485727A CN 102966936 B CN102966936 B CN 102966936B
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- 239000002912 waste gas Substances 0.000 title claims abstract description 19
- 239000002918 waste heat Substances 0.000 title abstract description 11
- 230000009466 transformation Effects 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 239000000779 smoke Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 33
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 7
- 239000003546 flue gas Substances 0.000 abstract description 7
- 238000004064 recycling Methods 0.000 abstract description 2
- 230000001174 ascending effect Effects 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
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, the economic benefits and social benefits phase transformation residual neat recovering system that particularly a kind of low-grade waste gas residual heat reclaims.
Background technology
At present, the efficiency of energy utilization of China is 33%, lower approximately 10 percentage points than developed country.Electric power, iron and steel, coloured, petrochemical industry, building materials, chemical industry, light industry, 8 industry major product specific energy consumption average specific international most advanced levels of weaving are high by 40%.When energy constraint contradiction highlights, efficiency of energy utilization compares and exists larger gap with advanced international standard.
Tradition " energy consumption rich and influential family " in the past decennary energy consumption declines year by year, energy conservation has obtained significant achievement, but still have some problems, in next step development, be faced with formidable challenges, 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 defect in the engineering reclaiming: 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.If open day is on April 27th, 2011, a kind of waste gas afterheat recovery system that publication number is 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; Between the delivery port of the first water inlet and waste-heat recoverer, by water inlet pipe, communicate, on water inlet pipe, be disposed with water intaking valve and the first control valve, between the water inlet of the first delivery port and waste-heat recoverer, by outlet pipe, communicate, on outlet pipe, be disposed with outlet valve, water pump and the second control valve, between the first water inlet and the first delivery port, also by being arranged at the water pipe of crossing of heat exchanger outside, communicate, cross on water pipe and be provided with the 3rd control valve.Above-mentioned waste gas afterheat recovery system is used single heat exchanger, and heat exchange efficiency and intensity are not high; And reclaiming available product is water, it is single that residual heat and energy reclaims product; Though be provided with valve, there is no 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 defects are restricting carrying out of energy conservation, become and improve a heat recovery efficiency difficult problem urgently to be resolved hurrily.
Summary of the invention
The object of the invention is to overcome above shortcomings in prior art, and provide a kind of reasonable in design, can meet the economic benefits and social benefits specification requirement that produces hot water and steam simultaneously, 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 low-grade waste gas residual heat of the more difficult utilization of recoverable reclaims.
The present invention addresses the above problem adopted technical scheme: 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 are placed in 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 one end of described tube connector, and one 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 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 phase-change heat-exchange drum, and one end of described down-comer is connected on the second entrance, and the other end of this down-comer is connected with 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 phase-change heat-exchange drum; One end of described isocon is connected on heat exchanger outlet pipe, and the other end of this isocon is connected with down-comer.Can meet 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 simultaneously, save heat exchanger materials, save heat exchanger cost, realize waste gas residual heat and recycle.In the time of needs steam, through the pre-warmed demineralized water of convection recuperator, do not flow in phase-change heat-exchange drum, directly through down-comer, flow in phase-change heat-exchanger, steam is collected by phase-change heat-exchange drum, then enters external system.
On tube connector of the present invention, be provided with control valve No. one.The adjustable flow that enters the demineralized water of system.
On heat exchanger outlet pipe of the present invention, be provided with No. two control valves and a flowmeter, 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; On described isocon, be provided with No. four control valves and No. two flowmeters, 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 thermal source working conditions change, and adaptability is better.
On phase-change heat-exchange drum steam outlet pipe of the present invention, be provided with control valve No. three.Can control the flow of steam, regulate the pressure in phase-change heat-exchange drum.
On heat exchanger outlet pipe of the present invention, be provided with No. one thermometer, a described thermometer is between flowmeter and phase-change heat-exchange drum; On described phase-change heat-exchange drum outlet pipe, be provided with thermometer No. two; On described phase-change heat-exchange drum steam outlet pipe, be provided with thermometer No. three, phase-change heat-exchange drum, No. three control valves and No. three thermometers are arranged in order; On described tedge, be provided with thermometer No. four.The temperature that can monitor respectively each several part liquid or steam, control performance is better.
On phase-change heat-exchange drum of the present invention, be provided with pressure gauge.Can monitor the force value in 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 meet 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, is conducive to recycle low-grade waste gas residual heat.
Accompanying drawing explanation
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
Below in conjunction with accompanying drawing and by embodiment, the present invention is described in further detail, and following examples are explanation of the invention and the present invention is not limited to following examples.
Referring to Fig. 1, the 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 are placed in flue 1, and smoke inlet 27, phase-change heat-exchanger 2, convection recuperator 3 and exhanst gas outlet 28 are arranged in order.
Convection recuperator 3 comprises that the first entrance 23 and the first outlet 24, the first entrances 23 are connected with one end of described tube connector 4, and one end of heat exchanger outlet pipe 6 is connected with in the first outlet 24, and the other end of heat exchanger outlet pipe 6 is connected with phase-change heat-exchange drum 16.
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 phase-change heat-exchange drum 16.
One end of isocon 22 is connected on heat exchanger outlet pipe 6, and the other end of this isocon 22 is connected with down-comer 19.
On tube connector 4, be provided with control valve 5 No. one; On heat exchanger outlet pipe 6, be provided with No. two control valves 7 and a flowmeter 8, 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; On isocon 22, be provided with No. four control valves 20 and No. two flowmeters 21, described No. four control valves 20 are between No. two flowmeters 21 and down-comer 19; On phase-change heat-exchange drum steam outlet pipe 12, be provided with No. three control valve 14.
On heat exchanger outlet pipe 6, be provided with thermometer 9 No. one, a described thermometer 9 is between flowmeter 8 and phase-change heat-exchange drum 16; On described phase-change heat-exchange drum outlet pipe 10, be provided with thermometer 11 No. two; On described phase-change heat-exchange drum steam outlet pipe 12, be provided with thermometer 13 No. three, phase-change heat-exchange drum 16, No. three control valves 14 and No. three thermometers 13 are arranged in order; On described tedge 17, be provided with No. four thermometer 18.
On phase-change heat-exchange drum 16, be provided with pressure gauge 15.
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.
A 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 generation saturated vapor, through tedge 17, enter phase-change heat-exchange drum 16, flue-gas temperature reduces.
The saturated vapor that enters phase-change heat-exchange drum 16 through tedge 17 and demineralized water heat exchange through convection recuperator 3 preheatings, the cooling aqueous water that condenses into of saturated vapor, through down-comer 19 backflow phase-change heat-exchangers 2, through preheating demineralized water, be further heated to higher temperature, through phase-change heat-exchange drum outlet pipe 10, flow into external system.
When needs steam, demineralized water through convection recuperator 3 preheatings does not flow into phase-change heat-exchange drum 16, all through down-comer 19, flow into phase-change heat-exchanger 2 and flue gas heat exchange, demineralized water is heated generation steam, through tedge 17, enter phase-change heat-exchange drum 16, by phase-change heat-exchange drum 16, collected, then through phase-change heat-exchange drum steam outlet pipe 12, enter external system, now phase-change heat-exchange drum 16 is equivalent to a pressure vessel.
In addition, it should be noted that, the specific embodiment described in this description, the shape of its parts and components, institute's title of being named etc. can be different, and the above content described in this description is only to structure example of the present invention explanation.All equivalence variation or simple change of doing according to described structure, feature and the principle of patent design of the present invention, are included in the protection domain of patent of the present invention.Those skilled in the art can make various modifications or supplement 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 (5)
1. the 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, heat exchanger outlet pipe, 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 are placed in 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, described the first entrance is connected with one end of described tube connector, described heat exchanger outlet pipe is connected in phase-change heat-exchange drum with phase-change heat-exchange drum outlet pipe, and the other end of this heat exchanger outlet pipe is connected with the first outlet; 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 phase-change heat-exchange drum, and one end of described down-comer is connected on the second entrance, and the other end of this down-comer is connected with 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 phase-change heat-exchange drum; One end of described isocon is connected on heat exchanger outlet pipe, the other end of this isocon is connected with down-comer, on described heat exchanger outlet pipe, be provided with No. two control valves and a flowmeter, described No. two control valves and a flowmeter are between phase-change heat-exchange drum and isocon, this flowmeter is between phase-change heat-exchange drum and No. two control valves, on described isocon, be provided with No. four control valves and No. two flowmeters, described No. four control valves are between No. two flowmeters and down-comer.
2. the economic benefits and social benefits phase transformation residual neat recovering system that a kind of low-grade waste gas residual heat according to claim 1 reclaims, is characterized in that: on described tube connector, be provided with control valve No. one.
3. the economic benefits and social benefits phase transformation residual neat recovering system that a kind of low-grade waste gas residual heat according to claim 1 reclaims, is characterized in that: on described phase-change heat-exchange drum steam outlet pipe, be provided with control valve No. three.
4. the economic benefits and social benefits phase transformation residual neat recovering system that a kind of low-grade waste gas residual heat according to claim 1 reclaims, it is characterized in that: on described heat exchanger outlet pipe, be provided with No. one thermometer, a described thermometer is between flowmeter and phase-change heat-exchange drum; On described phase-change heat-exchange drum outlet pipe, be provided with thermometer No. two; On described phase-change heat-exchange drum steam outlet pipe, be provided with thermometer No. three, phase-change heat-exchange drum, No. three control valves and No. three thermometers are arranged in order; On described tedge, be provided with thermometer No. four.
5. the economic benefits and social benefits phase transformation residual neat recovering system that a kind of low-grade waste gas residual heat according to claim 1 reclaims, is characterized in that: on described phase-change heat-exchange drum, be provided with pressure gauge.
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| Application Number | Priority Date | Filing Date | Title |
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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 true CN102966936B (en) | 2014-11-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN111189097B (en) * | 2020-02-12 | 2025-05-13 | 山西山安蓝天节能科技股份有限公司 | A heating system equipped with a composite phase-change heat exchanger to recover waste heat from flue gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6222905A (en) * | 1985-07-22 | 1987-01-31 | 株式会社東芝 | Exhaust-heat recovery heat exchanger |
| DE69328811T2 (en) * | 1992-10-20 | 2001-01-11 | Network Computing Devices, Inc. | Opcode dependent compression for a window system. |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6237542B1 (en) * | 1999-01-29 | 2001-05-29 | Kabushiki Kaisha Toshiba | Heat recovery boiler and hot banking releasing method thereof |
| CN2909142Y (en) * | 2006-04-07 | 2007-06-06 | 南京华电节能环保设备有限公司 | Calciner exhaust gas waste heat recovery device |
| CN201242383Y (en) * | 2008-06-20 | 2009-05-20 | 王云龙 | Dual-purpose phase change heat exchanger for vapor and water |
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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. |