CN203731368U - Device for deep recovery of smoke discharge waste heat of waste heat boiler - Google Patents
Device for deep recovery of smoke discharge waste heat of waste heat boiler Download PDFInfo
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- CN203731368U CN203731368U CN201320887214.6U CN201320887214U CN203731368U CN 203731368 U CN203731368 U CN 203731368U CN 201320887214 U CN201320887214 U CN 201320887214U CN 203731368 U CN203731368 U CN 203731368U
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- natural gas
- gas preheater
- heat exchanger
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- heat
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- 239000002918 waste heat Substances 0.000 title claims abstract description 49
- 238000011084 recovery Methods 0.000 title claims abstract description 18
- 239000000779 smoke Substances 0.000 title abstract description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 156
- 239000003345 natural gas Substances 0.000 claims abstract description 78
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000007789 gas Substances 0.000 claims description 19
- 241000196171 Hydrodictyon reticulatum Species 0.000 claims description 9
- 206010062717 Increased upper airway secretion Diseases 0.000 claims description 9
- 208000026435 phlegm Diseases 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 4
- 239000003245 coal Substances 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000007599 discharging Methods 0.000 description 5
- 239000003595 mist Substances 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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Abstract
The utility model relates to a device for deep recovery of smoke discharge waste heat of a waste heat boiler. At present, there is no reasonably structured device for the deep recovery of the smoke discharge waste heat of the waste heat boiler. The device for the deep recovery of the smoke discharge waste heat of the waste heat boiler comprises a superheater, an evaporator, a coal economizer, a heat supply network heat exchanger, a coal economizer inlet valve, a heat supply network heat exchanger outlet valve, a condensed water pipeline, a water supply pipe and a water return pipe, and the superheat, the evaporator, the coal economizer and the heat supply network heat exchanger are connected in sequence. The device for the deep recovery of the smoke discharge waste heat of the waste heat boiler further comprises an inlet valve for connecting the heat supply network heat exchanger with the coal economizer, an inlet valve for feeding condensed water to the heat supply network heat exchanger, a natural gas preheater inlet valve, a water pump, a natural gas preheater, a natural gas preheater outlet valve, an inlet pipe of the natural gas preheater and a discharge pipe of the natural gas preheater; the outlet of the heat supply network heat exchanger is connected with the inlet of the coal economizer through the inlet valve for connecting the heat supply network heat exchanger with the coal economizer, and the natural gas preheater inlet valve and the water pump are mounted on the inlet pipe of the natural gas preheater. The device for the deep recovery of the smoke discharge waste heat of the waste heat boiler can be well used in both heating period and non-heating period.
Description
Technical field
The utility model relates to a kind of device of recovery waste heat, especially relates to a kind of device of degree of depth recovery waste heat boiler exhaust gas waste heat, belongs to the waste heat boiler device for recycling exhaust smoke residual heat in combustion and steam combined cycle.
Background technology
In recent years, along with social development and scientific and technological progress, the require increasingly stringent of country to energy-saving and emission-reduction.Targets such as " unit GDP energy resource consumption reduce by 16%; unit GDP carbon dioxide emission reduction 17%; total emissions of major pollutants significantly reduces, and COD, SO2 emissions reduce respectively 8% " that country's 12 planning outlines have clearly specified 5 years from now on.Thermal Power Generation Industry is big power consumer, is also main disposal of pollutants source, and this just requires the various advanced persons' of each electricity power enterprise's active adoption energy conservation, improves comprehensive utilization rate of energy source.
Gas combustion-gas vapor combined cycle device has the advantages such as high efficiency, low pollution and peaking performance are good, pollutes and is on the rise at current environment, under the situation of traditional energy anxiety, enjoys favor.Even like this, still have more than 20% low temperature exhaust heat nearly to slattern by exhaust steam in steam turbine and waste heat boiler smoke evacuation, the comprehensive energy efficiency of combined cycle cannot further be improved.
In at present general combined cycle, waste heat boiler exhaust gas temperature is higher, and exhaust gas temperature is conventionally 150 DEG C of left and right.The shortcoming of traditional cogeneration system is that flue gas heat fails to be fully used.Patent and the practical engineering project of current existing more recovery waste heat boiler exhaust gas waste heat, as adopt low-level (stack-gas) economizer Mist heat recovering to be used for providing combined cycle generation efficiency, or waste heat boiler flue afterbody set up heat supply network heat exchanger come Mist heat recovering for heat supply to heat network system etc.Figure 1 shows that two pressure waste heat boiler schematic diagrames of typical Mist heat recovering in currently available technology, two pressure waste heat boilers of this Mist heat recovering are by superheater and evaporimeter 1, economizer 2, heat supply network heat exchanger 3, economizer inlet valve 4, heat supply network heat exchanger entrance valve 5, heat supply network heat exchanger exit valve 6, condensing water conduit 13 and the composition such as other pipeline and annex being attached thereto, the high-temperature flue gas of discharging through gas turbine acting enters waste heat boiler, pass through successively superheater, after evaporimeter 1 and economizer 2 and flue gas heat supply network heat exchanger 3, pass through flue expansion joint, damper, be discharged to atmosphere through chimney, condensate water is heated to be superheated steam output by high-temperature flue gas in waste heat boiler, pushing turbine acting, and supply water to user exporting outer net to after the heating of heat supply network backwater, this kind of mode be recyclable residual heat from boiler fume when heat supply in the winter time, reduce exhaust gas temperature, but summer is owing to not needing heat supply, waste heat boiler smoke discharging residual heat cannot reclaim, still cause larger waste.
In addition, in combustion and steam combined cycle, if gas source lateral pressure used is mated with the required gas pressure of combined cycle, in natural gas pressure regulating station, can cancel the pressure regulation work of compressor, now natural gas intake air temperature is lower, does not far reach the temperature requirement to thermal source in gas-turbine combustion chamber, thereby need carry out preheating to natural gas, but the current suitable method that there is no carries out preheating to it.
Utility model content
The purpose of this utility model is to overcome above shortcomings in prior art, and provide a kind of reasonable in design, easy to use, can all can make full use of in heat supply phase and non-heat supply phase, and can solve the device of the degree of depth recovery waste heat boiler exhaust gas waste heat of the heat source of combustion gas natural gas preheating existence.
The technical scheme in the invention for solving the above technical problem is: the device of this degree of depth recovery waste heat boiler exhaust gas waste heat comprises superheater, evaporimeter, economizer, heat supply network heat exchanger, economizer inlet valve, heat supply network heat exchanger entrance valve, heat supply network heat exchanger exit valve, condensing water conduit, feed pipe and return pipe, described superheater, evaporimeter, economizer is connected successively with heat supply network heat exchanger, one end of described condensing water conduit is connected to the entrance of economizer, described economizer inlet valve is arranged on condensing water conduit, one end of described return pipe is connected to the entrance of heat supply network heat exchanger, described heat supply network heat exchanger entrance valve installation is on return pipe, one end of described feed pipe is connected to the outlet of heat supply network heat exchanger, described heat supply network heat exchanger exit valve installation is on feed pipe, its design feature is: also comprise that heat supply network heat exchanger removes economizer inlet valve, the condensate water net heat exchanger entrance valve that reduces phlegm and internal heat, natural gas preheater inlet valve, water pump, natural gas preheater, natural gas preheater outlet valve, natural gas preheater inlet pipe and natural gas preheater go out pipe, the outlet of described heat supply network heat exchanger goes economizer inlet valve to be connected with the entrance of economizer by heat supply network heat exchanger, the entrance of described heat supply network heat exchanger and condensing water conduit are connected by the condensate water net heat exchanger entrance valve that reduces phlegm and internal heat, one end of described natural gas preheater inlet pipe is connected on feed pipe, the other end of this natural gas preheater inlet pipe is connected to the entrance of natural gas preheater, described natural gas preheater inlet valve and water pump are installed on natural gas preheater inlet pipe, one end that described natural gas preheater goes out pipe is connected on return pipe, the other end that this natural gas preheater goes out pipe is connected to the outlet of natural gas preheater, described natural gas preheater outlet valve is arranged on natural gas preheater and goes out on pipe.
As preferably, natural gas preheater inlet valve described in the utility model, water pump and natural gas preheater are arranged in order along natural gas preheater inlet pipe.
The utility model compared with prior art, have the following advantages and effect: (1) is rational in infrastructure, scientific arrangement, dependable performance, on the basis of combustion and steam combined cycle, heat supply network heat exchanger, economizer and natural gas preheater are organically combined, fully recycle waste heat boiler smoke discharging residual heat, efficiently solve the waste problem of existing combined cycle low-temperature heat source, the comprehensive energy efficiency of combined cycle thermoelectric factory is increased substantially.(2) effectively improved the utilization rate of heat supply network heat exchanger.In the non-heat supply phase, part or all of heat supply network heat exchanger used as economizer, realize and the connecting of economizer, promote condensate water inlet temperature, this can make boiler non-during for the hot season exhaust gas temperature reduce, raise the efficiency saving fuel.(3) ensured the thermal source that natural gas preheater is reliable and stable.When for the hot season, the required thermal source of natural gas preheater is that the heat supply network after the heating of heat supply network heat exchanger supplies water; In the time of the non-confession hot season, the required thermal source of natural gas preheater is that the condensate water that condensate water is entered after the heating of heat supply network heat exchanger after switching supplies water.(4) waste heat boiler can be single pressure, two pressure or three pressing system structures; Heat supply network heat exchanger can carry out serial or parallel connection switching by the valve being connected in heat supply phase and non-heat supply phase with economizer, but and the heat supply network heat-transfer surface of heat supply network heat exchanger part or all connect with economizer; Natural gas preheater can be carried out switching in parallel with heat supply network heat exchanger or economizer in heat supply phase and non-heat supply phase, uses flexibly, widely applicable.
Brief description of the drawings
Fig. 1 is the structural representation of two pressure waste heat boilers of typical Mist heat recovering in background technology.
Fig. 2 is the structural representation of the device of degree of depth recovery waste heat boiler exhaust gas waste heat in the utility model embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing and by embodiment, the utility model is described in further detail, and following examples are to explanation of the present utility model and the utility model is not limited to following examples.
Embodiment.
Referring to Fig. 2, the device of the degree of depth recovery waste heat boiler exhaust gas waste heat in the present embodiment comprises superheater, evaporimeter 1, economizer 2, heat supply network heat exchanger 3, economizer inlet valve 4, heat supply network heat exchanger entrance valve 5, heat supply network heat exchanger exit valve 6, heat supply network heat exchanger removes economizer inlet valve 7, the condensate water net heat exchanger entrance valve 8 that reduces phlegm and internal heat, natural gas preheater inlet valve 9, water pump 10, natural gas preheater 11, natural gas preheater outlet valve 12, condensing water conduit 13, feed pipe 14, return pipe 15, natural gas preheater inlet pipe 16 and natural gas preheater go out pipe 17.
Superheater, evaporimeter 1, economizer 2 and heat supply network heat exchanger 3 in the present embodiment are connected successively, one end of condensing water conduit 13 is connected to the entrance of economizer 2, economizer inlet valve 4 is arranged on condensing water conduit 13, one end of return pipe 15 is connected to the entrance of heat supply network heat exchanger 3, heat supply network heat exchanger entrance valve 5 is arranged on return pipe 15, one end of feed pipe 14 is connected to the outlet of heat supply network heat exchanger 3, and heat supply network heat exchanger exit valve 6 is arranged on feed pipe 14.
In the present embodiment, the outlet of heat supply network heat exchanger 3 goes economizer inlet valve 7 to be connected with the entrance of economizer 2 by heat supply network heat exchanger, the entrance of heat supply network heat exchanger 3 and condensing water conduit 13 are connected by the condensate water net heat exchanger entrance valve 8 that reduces phlegm and internal heat, one end of natural gas preheater inlet pipe 16 is connected on feed pipe 14, the other end of this natural gas preheater inlet pipe 16 is connected to the entrance of natural gas preheater 11, natural gas preheater inlet valve 9 and water pump 10 are installed on natural gas preheater inlet pipe 16, natural gas preheater inlet valve 9, water pump 10 and natural gas preheater 11 are arranged in order along natural gas preheater inlet pipe 16.
In the present embodiment, natural gas preheater goes out pipe one end of 17 and is connected on return pipe 15, and the other end that this natural gas preheater goes out pipe 17 is connected to the outlet of natural gas preheater 11, and natural gas preheater outlet valve 12 is arranged on natural gas preheater and goes out on pipe 17.
Waste heat boiler in the present embodiment is a two pressure waste heat boiler, waste heat boiler in the utility model can be also two pressure or three pressing system structures, what participate in degree of depth waste heat recovery is low-pressure coal saver part wherein, when for the hot season, heat supply network heat exchanger goes economizer inlet valve 7 and the condensate water net heat exchanger entrance valve 8 that reduces phlegm and internal heat to cut out, condensate water and hot net water enter respectively economizer 2 and heat supply network heat exchanger 3 recovery waste heat boiler exhaust gas waste heats, some enters natural gas preheater 11 waste heat that heat supply network heat exchanger 3 reclaims, for realizing natural gas preheating.In the time of the non-confession hot season, economizer inlet valve 4, heat supply network heat exchanger entrance valve 5 and heat supply network heat exchanger exit valve 6 are closed, heat supply network heat exchanger goes economizer inlet valve 7 and the condensate water net heat exchanger entrance valve 8 that reduces phlegm and internal heat to open, condensate water enters heat supply network heat exchanger 3 and reclaims after smoke discharging residual heat through the condensate water net heat exchanger entrance valve 8 that reduces phlegm and internal heat, go economizer inlet valve 7 to enter the further absorption boiler smoke discharging residual heat of economizer 2 through heat supply network heat exchanger, wherein a part of condensate water after heat supply network heat exchanger heating at natural gas preheater inlet valve 9, water pump 10, natural gas preheater 11 and natural gas preheater outlet valve 12 form closed circuit, form in parallel with the condensing water conduit 13 that removes economizer.
The hot net water or the condensing water flow that in the present embodiment, enter natural gas preheater 11 can be determined according to parameters such as the temperature of the required lifting of natural gas preheating, the working medium of flowing through in natural gas preheater 11 due to heat supply phase and non-heat supply phase is different, make working medium chemical quality different, so need increase Chemical cleaning pipeline while mutually switching.
In addition, it should be noted that, the specific embodiment described in this description, shape, institute's title of being named etc. of its parts and components can be different, and the above content described in this description is only to the explanation of the utility model structure example.All equivalence variation or simple change of doing according to described structure, feature and the principle of the utility model patent design, are included in the protection domain of the utility model patent.The utility model person of ordinary skill in the field can make various amendments or supplements or adopt similar mode to substitute described specific embodiment; only otherwise depart from structure of the present utility model or surmount this scope as defined in the claims, all should belong to protection domain of the present utility model.
Claims (2)
1. the device of a degree of depth recovery waste heat boiler exhaust gas waste heat, comprise superheater, evaporimeter, economizer, heat supply network heat exchanger, economizer inlet valve, heat supply network heat exchanger entrance valve, heat supply network heat exchanger exit valve, condensing water conduit, feed pipe and return pipe, described superheater, evaporimeter, economizer is connected successively with heat supply network heat exchanger, one end of described condensing water conduit is connected to the entrance of economizer, described economizer inlet valve is arranged on condensing water conduit, one end of described return pipe is connected to the entrance of heat supply network heat exchanger, described heat supply network heat exchanger entrance valve installation is on return pipe, one end of described feed pipe is connected to the outlet of heat supply network heat exchanger, described heat supply network heat exchanger exit valve installation is on feed pipe, it is characterized in that: also comprise that heat supply network heat exchanger removes economizer inlet valve, the condensate water net heat exchanger entrance valve that reduces phlegm and internal heat, natural gas preheater inlet valve, water pump, natural gas preheater, natural gas preheater outlet valve, natural gas preheater inlet pipe and natural gas preheater go out pipe, the outlet of described heat supply network heat exchanger goes economizer inlet valve to be connected with the entrance of economizer by heat supply network heat exchanger, the entrance of described heat supply network heat exchanger and condensing water conduit are connected by the condensate water net heat exchanger entrance valve that reduces phlegm and internal heat, one end of described natural gas preheater inlet pipe is connected on feed pipe, the other end of this natural gas preheater inlet pipe is connected to the entrance of natural gas preheater, described natural gas preheater inlet valve and water pump are installed on natural gas preheater inlet pipe, one end that described natural gas preheater goes out pipe is connected on return pipe, the other end that this natural gas preheater goes out pipe is connected to the outlet of natural gas preheater, described natural gas preheater outlet valve is arranged on natural gas preheater and goes out on pipe.
2. the device of degree of depth recovery waste heat boiler exhaust gas waste heat according to claim 1, is characterized in that: described natural gas preheater inlet valve, water pump and natural gas preheater are arranged in order along natural gas preheater inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320887214.6U CN203731368U (en) | 2013-12-31 | 2013-12-31 | Device for deep recovery of smoke discharge waste heat of waste heat boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320887214.6U CN203731368U (en) | 2013-12-31 | 2013-12-31 | Device for deep recovery of smoke discharge waste heat of waste heat boiler |
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| CN203731368U true CN203731368U (en) | 2014-07-23 |
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| CN201320887214.6U Expired - Fee Related CN203731368U (en) | 2013-12-31 | 2013-12-31 | Device for deep recovery of smoke discharge waste heat of waste heat boiler |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105180144A (en) * | 2015-08-14 | 2015-12-23 | 中国能源建设集团广东省电力设计研究院有限公司 | Boiler flue gas waste heat recovery system |
| CN107388228A (en) * | 2017-09-04 | 2017-11-24 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of waste heat boiler afterbody heat exchanger system |
| CN110056900A (en) * | 2019-04-12 | 2019-07-26 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | A kind of GTCC power plant starting trouble afterheat utilizing system |
| CN110440239A (en) * | 2019-08-22 | 2019-11-12 | 华北电力大学 | A kind of the depth recyclable device and method of heat of smoke discharged from boiler of power station and moisture |
| CN112856364A (en) * | 2021-01-21 | 2021-05-28 | 中国神华能源股份有限公司国华电力分公司 | Method for increasing waste heat utilization rate of gas combined cycle unit |
-
2013
- 2013-12-31 CN CN201320887214.6U patent/CN203731368U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105180144A (en) * | 2015-08-14 | 2015-12-23 | 中国能源建设集团广东省电力设计研究院有限公司 | Boiler flue gas waste heat recovery system |
| CN107388228A (en) * | 2017-09-04 | 2017-11-24 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of waste heat boiler afterbody heat exchanger system |
| CN110056900A (en) * | 2019-04-12 | 2019-07-26 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | A kind of GTCC power plant starting trouble afterheat utilizing system |
| CN110440239A (en) * | 2019-08-22 | 2019-11-12 | 华北电力大学 | A kind of the depth recyclable device and method of heat of smoke discharged from boiler of power station and moisture |
| CN112856364A (en) * | 2021-01-21 | 2021-05-28 | 中国神华能源股份有限公司国华电力分公司 | Method for increasing waste heat utilization rate of gas combined cycle unit |
| CN112856364B (en) * | 2021-01-21 | 2022-12-30 | 中国神华能源股份有限公司国华电力分公司 | Method for increasing waste heat utilization rate of gas combined cycle unit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
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Address after: Hangzhou City, Zhejiang Province, 310030 Xihu District science and Technology Park of West Lake Park Road, No. 10 Patentee after: HUADIAN ELECTRIC POWER RESEARCH INSTITUTE Co.,Ltd. Address before: Hangzhou City, Zhejiang Province, 310030 Xihu District science and Technology Park of West Lake Park Road, No. 10 Patentee before: Huadian Electric Power Research Institute |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 |