CN101793172A - Combined heat and power device for directly recovering exhaust afterheat of power station steam turbine by absorption heat pump - Google Patents
Combined heat and power device for directly recovering exhaust afterheat of power station steam turbine by absorption heat pump Download PDFInfo
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- CN101793172A CN101793172A CN200910215585A CN200910215585A CN101793172A CN 101793172 A CN101793172 A CN 101793172A CN 200910215585 A CN200910215585 A CN 200910215585A CN 200910215585 A CN200910215585 A CN 200910215585A CN 101793172 A CN101793172 A CN 101793172A
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E20/14—Combined heat and power generation [CHP]
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Abstract
The invention relates to a combined heat and power device for directly recovering exhaust afterheat of a power station steam turbine by an absorption heat pump, which is used for recovering the exhaust afterheat of the power station steam turbine. The combined heat and power device comprises a power plant boiler (1), the steam turbine (2), an electric generator (3), a steam turbine exhaust pipe (4), a direct air cooling condenser (20), a cooling fan (21), an exhaust condensate pump (8), a steam extraction and water condensation boiler pipe (9), the absorption heat pump (10), a hot water return pipe (11), a hot water outlet pipe (12) and a steam turbine extraction pipe (13), wherein the absorption heat pump (10) comprises a generator (14), a condenser (15), an absorber (16) and an evaporator (17). The combined heat and power device is characterized in that: low-pressure steam pipes discharged by the steam turbine (2) are divided into two paths, wherein one path is connected with the direct air cooling condenser (20) through the steam turbine exhaust pipe (4), while the other path is connected with the evaporator (17) of the absorption heat pump (10) through a steam turbine exhaust evaporator tube (19). The combined heat and power device can more effectively recycle low-grade exhaust condensation heat of a power plant, and reduces the temperature loss, improves the supply water temperature of hot water, and reduces the system investment and operating cost on the premise of not changing the exhaust back pressure.
Description
(1) technical field
The present invention relates to a kind of absorption heat pump and directly reclaim power station steam turbine exhausted spare heat cogenerator.Be used to reclaim the power station steam turbine exhausted spare heat.
(2) background technique
Hot water pipe nets such as China's winter heating, concentrated supply of heating in the city, production technology central heat supply adopt thermoelectricity plant's cogeneration central heat supply pattern under many circumstances.Even under the heat supply operating mode, the low-grade exhausted spare heat behind a large amount of steam turbine power generations is also arranged owing to can't utilize, be discharged in the atmosphere by circulating water (generally passing through cooling tower) or air cooling system, influence the overall efficiency of using energy source.
As shown in Figure 1, at present central heat supply hot water generally adopts the medium pressure steam that power plant steam turbine extracts (be generally 0.3～1.0MPa) by the direct heat hot water central heat supply of vapor-water heat exchanger, the low-grade exhausted spare heat behind the steam turbine power generation can't utilize.In order effectively to utilize exhausted spare heat, also has a kind of mode at present as shown in Figure 2, adopt the remaining hot water system to extract that (the water-cooled unit directly adopts cooling circulating water system by condenser the waste heat of turbine discharge, air cooling system need be set up condenser, waste heat water pump and respective line system etc.), adopt the absorption heat pump technology (to be generally 0.3～1.0MPa) driving by drawing gas of steam turbine, extraction enters the remaining hot water heat of absorption heat pump vaporizer, heating central heat supply hot water, realize that the turbine discharge waste heat extracts, realize energy-saving benefit, the required distance of this kind mode absorption type heat pump assembly and turbine discharge system is not high, can far can be near, relatively flexibly.But this kind extracts the turbine discharge waste heat indirectly by remaining hot water, can increase the power consumption of remaining hot water system investment (particularly to air cooling system), water pump, because the temperature loss that steam discharge and remaining hot water heat exchange cause influences unfavorable factors such as central heat supply water temperature liter.
(3) summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, provide a kind of effective recycling more power station low-grade steam discharge heat of condensation, reduce temperature loss not changing under the steam discharge back pressure prerequisite, improve the hot water supply water temperature, the absorption heat pump of investment of minimizing system and operating cost directly reclaims power station steam turbine exhausted spare heat cogenerator.
The object of the present invention is achieved like this: a kind of absorption heat pump directly reclaims power station steam turbine exhausted spare heat cogenerator, comprise boiler of power plant, steam turbine, generator, the turbine discharge pipe, direct air condensed steam device, cooling blower, the steam discharge condensate pump, water twice-cooked stir-frying boiler tube with fixed attention draws gas, absorption heat pump, hot water return pipe, hot water outlet pipe and extracted steam from turbine pipe, described absorption heat pump comprises generator, condenser, adsorber and vaporizer, be characterized in the low pressure steam pipe that steam turbine is discharged is divided into two the tunnel, the turbine discharge pipe of leading up to links to each other with direct air condensed steam device, and another road is advanced evaporator tube by turbine discharge and linked to each other with the vaporizer of absorption heat pump.
The invention has the beneficial effects as follows:
The present invention adopts the absorption heat pump technology to reclaim the turbine discharge heat of condensation, utilize (general 0.3～1.0MPa) steam (the 60% left and right sides heat) driving of drawing gas of steam turbine, power station steam turbine is discharged low pressure steam and is directly entered absorption heat pump vaporizer heat exchange in-tube condensation by pipeline, reclaim steam discharge heat of condensation (40% left and right sides heat), for production technology and life provide central heat supply hot water (100% heat), heat-exchange system in the middle of saving is gone, minimizing system investment (for air cooling system) and water pump power consumption, eliminate the heat exchange temperature loss, make the easier utilization of exhausted spare heat, improve cogeneration central heating system comprehensive energy utilization ratio.Improve maximum heat capacity about 70% not increasing under the thermal source situation, realize economic benefit and social benefits such as dilatation, energy-conservation, reduction of discharging.Because generating back steam turbine exhaust pressure is low, is not suitable for remote conveying, above scheme is suitable for absorption heat pump unit and is placed on the occasion nearer apart from exhaust steam pipe.
(4) description of drawings
Fig. 1 was for passed through the direct heat hot water central heating system of vapor-water heat exchanger schematic representation in the past.
Fig. 2 reclaimed power station steam turbine exhausted spare heat cogeneration system schematic representation for adopt absorption heat pump in the past.
Fig. 3 directly reclaims power station steam turbine exhausted spare heat cogenerator schematic representation for absorption heat pump of the present invention.
Among the figure:
Boiler of power plant 1, steam turbine 2, generator 3, turbine discharge pipe 4, steam discharge condensate pump 8, water twice-cooked stir-frying boiler tube 9 with fixed attention draws gas, absorption heat pump 10, hot water return pipe 11, the hot water outlet pipe 12, extracted steam from turbine pipe 13, generator 14, condenser 15, adsorber 16, vaporizer 17, the steam discharge water of condensation goes out evaporator pump 18, turbine discharge advances evaporator tube 19, direct air condensed steam device 20, cooling blower 21, steam-water heat exchanging unit 22, circulating water goes out evaporator tube 23, circulating water advances evaporator tube 24.
(5) embodiment
Be illustrated in figure 3 as the power plant that adopts air directly to cool off turbine discharge, adopt absorption heat pump directly to reclaim power station steam turbine exhausted spare heat cogenerator schematic representation.It goes out evaporator pump 18 and turbine discharge by boiler of power plant 1, steam turbine 2, generator 3, turbine discharge pipe 4, direct air condensed steam device 20, cooling blower 21, steam discharge condensate pump 8, draw gas with fixed attention water twice-cooked stir-frying boiler tube 9, absorption heat pump 10, hot water return pipe 11, hot water outlet pipe 12, extracted steam from turbine pipe 13, steam discharge water of condensation and advances the absorption heat pump that evaporator tube 19 and control system (not shown) etc. constitute and directly reclaim power station steam turbine exhausted spare heat cogenerator.Described absorption heat pump 10 is made up of generator 14, condenser 15, adsorber 16 and vaporizer 17.Be characterized in the low pressure steam pipe that steam turbine is discharged is divided into two the tunnel, the turbine discharge pipe 4 of leading up to links to each other with direct air condensed steam device 20, and another road is advanced evaporator tube 19 (can be single or many) by turbine discharge and linked to each other with absorption heat pump vaporizer 17.When the heat supply operating mode is moved, extract with extracted steam from turbine pipe 13 and (to be generally 0.3～1.0MPa) steam enters absorption heat pump as driving heat source generator 14 heat releases.Turbine discharge advances in the heat exchanging tube of vaporizer 17 that evaporator tube 19 preferentially enters absorption heat pump to condense by turbine discharge, extract the turbine discharge waste heat, the hot water that adds heat absorber and condenser by absorption type heat pump system, realize the turbine discharge heat recovery, for production technology and life provide central heat supply hot water.The residue low pressure steam that can't all utilize enters be cooled circulating water cooling of direct air condensed steam device 20.
Above absorption heat pump reclaims directly that absorption heat pump can be single cover or many covers in the scheme of power station steam turbine exhausted spare heat cogenerator.Can be single-effect type absorption heat pump, dual effect absorption heat pump, two-stage type absorption heat pump.
Claims (3)
1. an absorption heat pump directly reclaims power station steam turbine exhausted spare heat cogenerator, comprise boiler of power plant (1), steam turbine (2), generator (3), turbine discharge pipe (4), direct air condensed steam device (20), cooling blower (21), steam discharge condensate pump (8), water twice-cooked stir-frying boiler tube (9) with fixed attention draws gas, absorption heat pump (10), hot water return pipe (11), hot water outlet pipe (12) and extracted steam from turbine pipe (13), described absorption heat pump (10) comprises generator (14), condenser (15), adsorber (16) and vaporizer (17), it is characterized in that the low pressure steam pipe that steam turbine (2) is discharged is divided into two the tunnel, the turbine discharge pipe (4) of leading up to links to each other with direct air condensed steam device (20), and another road is advanced evaporator tube (19) by turbine discharge and linked to each other with the vaporizer (17) of absorption heat pump (10).
2. a kind of absorption heat pump according to claim 1 directly reclaims power station steam turbine exhausted spare heat cogenerator, it is characterized in that described absorption heat pump (10) is single cover or many covers.
3. a kind of absorption heat pump according to claim 1 and 2 directly reclaims power station steam turbine exhausted spare heat cogenerator, it is characterized in that described absorption heat pump (10) is single-effect type absorption heat pump, dual effect absorption heat pump or two-stage type absorption heat pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910215585A CN101793172A (en) | 2009-12-21 | 2009-12-21 | Combined heat and power device for directly recovering exhaust afterheat of power station steam turbine by absorption heat pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910215585A CN101793172A (en) | 2009-12-21 | 2009-12-21 | Combined heat and power device for directly recovering exhaust afterheat of power station steam turbine by absorption heat pump |
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| CN101793172A true CN101793172A (en) | 2010-08-04 |
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| CN200910215585A Pending CN101793172A (en) | 2009-12-21 | 2009-12-21 | Combined heat and power device for directly recovering exhaust afterheat of power station steam turbine by absorption heat pump |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721094A (en) * | 2012-06-14 | 2012-10-10 | 华电电力科学研究院 | Heating system for recycling waste heat of open circulating water in power plant |
| CN102828789A (en) * | 2011-06-14 | 2012-12-19 | 同方节能工程技术有限公司 | Low-voltage heating equipment of power plant |
| CN104089428A (en) * | 2014-06-27 | 2014-10-08 | 双良节能系统股份有限公司 | Air cooling single-effect type lithium bromide absorbing type refrigerating machine |
| ES2524891A1 (en) * | 2013-06-12 | 2014-12-15 | Universidad Politécnica de Madrid | Evaporator device for liquid waste produced in condensing boilers (Machine-translation by Google Translate, not legally binding) |
| CN104405457A (en) * | 2014-11-28 | 2015-03-11 | 中国华能集团公司 | Energy cascade utilization system of back pressure turbine heating |
| CN112943397A (en) * | 2021-02-01 | 2021-06-11 | 房盼盼 | Star-closed circulation system for seawater temperature difference power generation device |
-
2009
- 2009-12-21 CN CN200910215585A patent/CN101793172A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828789A (en) * | 2011-06-14 | 2012-12-19 | 同方节能工程技术有限公司 | Low-voltage heating equipment of power plant |
| CN102721094A (en) * | 2012-06-14 | 2012-10-10 | 华电电力科学研究院 | Heating system for recycling waste heat of open circulating water in power plant |
| ES2524891A1 (en) * | 2013-06-12 | 2014-12-15 | Universidad Politécnica de Madrid | Evaporator device for liquid waste produced in condensing boilers (Machine-translation by Google Translate, not legally binding) |
| CN104089428A (en) * | 2014-06-27 | 2014-10-08 | 双良节能系统股份有限公司 | Air cooling single-effect type lithium bromide absorbing type refrigerating machine |
| CN104405457A (en) * | 2014-11-28 | 2015-03-11 | 中国华能集团公司 | Energy cascade utilization system of back pressure turbine heating |
| CN112943397A (en) * | 2021-02-01 | 2021-06-11 | 房盼盼 | Star-closed circulation system for seawater temperature difference power generation device |
| CN112943397B (en) * | 2021-02-01 | 2022-07-29 | 房盼盼 | Circulating system for seawater temperature difference power generation device |
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Owner name: SHUANGLIANG ECO-ENERGEY SYSTEMS CO.,LTD. Free format text: FORMER OWNER: SHUANGLIANG AIR CONDITIONING EQUIPMENT CO LTD, JIANGSU Effective date: 20100913 |
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Effective date of registration: 20100913 Address after: 214444 Jiangsu city of Jiangyin Province Li Town Road No. 1 West Applicant after: Shuangliang Energy Saving System Co., Ltd. Address before: 214444 Jiangsu city of Jiangyin Province Li Town Road No. 1 West Applicant before: Shuangliang Air Conditioning Equipment Co., Ltd., Jiangsu |
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Application publication date: 20100804 |