CN102182527A - Heat power combined heat supply system for efficiently recycling residual heat exhausted by steam turbine in power station - Google Patents
Heat power combined heat supply system for efficiently recycling residual heat exhausted by steam turbine in power station Download PDFInfo
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- CN102182527A CN102182527A CN2011100843278A CN201110084327A CN102182527A CN 102182527 A CN102182527 A CN 102182527A CN 2011100843278 A CN2011100843278 A CN 2011100843278A CN 201110084327 A CN201110084327 A CN 201110084327A CN 102182527 A CN102182527 A CN 102182527A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
The invention relates to a heat power combined heat supply system for efficiently recycling residual heat exhausted by a steam turbine in a power station, which is used for recycling residual heat exhausted by the steam turbine in the power station. The heat power combined heat supply system comprises a steam turbine (1), a steam turbine exhaust main pipe (2), a direct air condensing system (3), a heat requiring place (4), a hot water discharge pipeline system (5), an absorption type heat pump (6-2) and a hot water return pipeline system (7), wherein the steam turbine exhaust main pipe (2) for exhausting the steam turbine (1) is divided into three paths, one path is connected with the direct air condensing system (3) by a steam turbine exhaust and intake direct air condensing pipe (8), one path is connected with a water return preheater (1-8) by a steam turbine exhaust and charged/returned water preheater pipe (19), and the other path is connected with an evaporator (14) of the absorption type heat pump (6-2) by a steam turbine exhaust and intake absorption type heat pump evaporator pipe (9). The invention has the advantages of efficiently recycling low-grade exhaust condensing heat in the power station, reducing the heat supply running cost, increasing the energy utilization ratio and reducing the atmosphere thermal pollution.
Description
Technical field
The present invention relates to a kind of recovery power station steam turbine exhausted spare heat cogeneration heating system.Be used to reclaim the power station steam turbine exhausted spare heat.Belong to the heating equipment technical field.
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.For the thermoelectricity plant of Direct Air-cooled Unit, 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 air cooling system, influence the overall efficiency of using energy source.
As shown in Figure 1, central heat supply hot water generally adopts the medium pressure steam (being generally (0.2～1.0) MPa) of power plant steam turbine extraction to pass through the direct heat hot water central heat supply of vapor-water heat exchanger at present, and 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 absorption heat pump technology, draw gas (being generally (0.2～1.0) MPa) by steam turbine drives, directly extract low-grade steam discharge heat of condensation, heating central heat supply hot water realizes that the turbine discharge waste heat extracts, and realizes energy-saving benefit; Other has a kind of mode as shown in Figure 3, adopt the absorption heat pump technology, (be generally 0.2～1.0MPa) driving by drawing gas of steam turbine, turbine discharge is by water-cooled condensing heat exchanger Heating Cyclic water, circulating water enters the heat release of absorption heat pump vaporizer, realize that the turbine discharge waste heat extracts, and realizes energy-saving benefit.This dual mode is fit to the system of heat supply water return water temperature about 50 ℃.Be lower than the system of turbine discharge condensing temperature for return water temperature, directly adopt the absorption heat pump technology to heat up, Economy is relatively poor.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, provide a kind of suitable scope wide, can the low-grade steam discharge heat of condensation in more recovery power station, system's investment and the low high efficiente callback power station steam turbine exhausted spare heat cogeneration heating system of operating cost.
The object of the present invention is achieved like this: a kind of high efficiente callback power station steam turbine exhausted spare heat cogeneration heating system, comprise steam turbine, the turbine discharge house steward, the direct air cooling condensing system, use thermal field institute, hot water effluent's pipeline system, absorption heat pump and hot water backwater's pipeline system, described absorption heat pump comprises vaporizer, adsorber, generator and condenser, be characterized in: the turbine discharge house steward that steam turbine is discharged is divided into three the tunnel: the turbine discharge of leading up to advances the direct air cooling catch tank and links to each other with the direct air cooling condensing system, the turbine discharge of leading up to advances the backwater preheater tube and links to each other with the backwater preheater, and another road is advanced the absorption heat pump evaporator tube by turbine discharge and linked to each other with the vaporizer of absorption heat pump; The low-temperature water heating of returning with thermal field links to each other with the backwater preheater by hot water backwater's pipeline system, the hot water that comes out from the backwater preheater links to each other with the adsorber of absorption heat pump by the laggard absorption heat pump absorber tube of backwater preheating, and the high-temperature-hot-water that the condenser of self absorption formula heat pump comes out passes through hot water effluent's pipeline system and links to each other with thermal field.
High efficiente callback power station steam turbine exhausted spare heat cogeneration heating system of the present invention is set up a reheater at described absorption heat pump hot water outlet.
The low-temperature water heating that personal thermal field is returned is introduced into the preheating of backwater preheater by hot water backwater's pipeline system, the adsorber and the condenser that enter absorption heat pump again heat up, hot water also can enter reheater and further heats up when needing the hot water temperature higher, enters the heat supply hot water pipe net then to using thermal field institute.
The invention has the beneficial effects as follows:
The present invention organically is used in combination absorption heat pump and backwater preheater, by the backwater preheater part turbine discharge heat of condensation is passed to the lower heat supply water of return water temperature, return water temperature is raise, adopt the absorption heat pump technology again, utilize (general (0.2～1.0) MPa) steam driven 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 the steam discharge heat of condensation, provide central heat supply hot water for production technology and life jointly, the turbine discharge heat of condensation obtains dual recycling, has really improved cogeneration central heating system comprehensive energy utilization ratio.Realize economic benefit and social benefits such as energy-conservation, reduction of discharging.
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 was for to adopt turbine exhaust steam in electric power plant directly to enter the central heating system schematic representation of absorption heat pump recovery waste heat in the past.
Fig. 3 is the central heating system schematic representation that circulating water enters the absorption heat pump recovery waste heat after the heat exchange of the water-cooled of turbine exhaust steam in electric power plant employing in the past condensing heat exchanger.
Fig. 4 is a high efficiente callback power station steam turbine exhausted spare heat cogeneration heating system schematic representation of the present invention.
Fig. 5 is the high efficiente callback power station steam turbine exhausted spare heat cogeneration heating system schematic representation of band reheater heating heat supply water of the present invention.
Among the figure:
Steam turbine 1, turbine discharge house steward 2, direct air cooling condensing system 3, with thermal field institute 4, hot water effluent's pipeline system 5, vapor-water heat exchanger 6-1, absorption heat pump 6-2, hot water backwater's pipeline system 7, turbine discharge advances direct air cooling catch tank 8, turbine discharge advances absorption heat pump evaporator tube 9, turbine discharge water inlet condensation vapour Tube Sheet of Heat Exchanger 10, water-cooled condensing heat exchanger 11, circulating water line system 12, the laggard absorption heat pump absorber tube 13 of backwater preheating, vaporizer 14, adsorber 15, generator 16, condenser 17, backwater preheater 18, turbine discharge advances backwater preheater tube 19, pumped vacuum systems 20, reheater 21, station boiler 22.
Embodiment
Scheme one:
Be illustrated in figure 4 as high efficiente callback power station steam turbine exhausted spare heat cogeneration heating system schematic representation of the present invention.It is by steam turbine 1, turbine discharge house steward 2, direct air cooling condensing system 3, with thermal field institute 4, hot water effluent's pipeline system 5, absorption heat pump 6-2, hot water backwater's pipeline system 7, turbine discharge advances direct air cooling catch tank 8, turbine discharge advances absorption heat pump evaporator tube 9, the laggard absorption heat pump absorber tube 13 of backwater preheating, backwater preheater 18, turbine discharge advances backwater preheater tube 19, pumped vacuum systems 20, and the pipeline that is connected, formations such as valve and control system (not shown).Described absorption heat pump 6-2 is made up of vaporizer 14, adsorber 15, generator 16 and condenser 17.Be characterized in the turbine discharge house steward 2 that steam turbine 1 is discharged is divided into three the tunnel, the turbine discharge of leading up to advances direct air cooling catch tank 8 and links to each other with direct air cooling condensing system 3, the turbine discharge of leading up to advances backwater preheater tube 19 and links to each other with backwater preheater 18, and another road is advanced absorption heat pump evaporator tube 9 by turbine discharge and linked to each other with the vaporizer 14 of absorption heat pump 6-2; With thermal field 4 low-temperature water heatings of returning link to each other with backwater preheater 18 by hot water backwater's pipeline system 7, the hot water that comes out from backwater preheater 18 links to each other with the adsorber 15 of absorption heat pump 6-2 by the laggard absorption heat pump absorber tube 13 of backwater preheating, and the high-temperature-hot-water that the condenser 17 of self absorption formula heat pump 6-2 comes out passes through hot water effluent's pipeline system 5 and links to each other with thermal field institute 4.When the heat supply operating mode was moved, the low-temperature water heating that personal thermal field is returned heated up after being introduced into backwater preheater 18 a large amount of absorption turbine discharge heat of condensation, enters the adsorber 15 of absorption heat pump 6-2 again by the laggard absorption heat pump absorber tube 13 of backwater preheating; Absorption heat pump 6-2 enters generator 16 heat releases with the steam of extracted steam from turbine (being generally (0.2～1.0) MPa) as driving heat source.Turbine discharge advances in the heat exchanging tube of vaporizer 14 that absorption heat pump evaporator tube 9 enters absorption heat pump 6-2 to condense by turbine discharge, extract the turbine discharge heat of condensation, the hot water that adds heat absorber 15 and condenser 17 by absorption type heat pump system, realize that the high efficiente callback of turbine discharge waste heat utilizes, for production technology and life provide central heat supply hot water.The residue low pressure steam that can't all utilize enters 3 coolings of direct air cooling condensing system.
In actual heat supply running process for better air cooling Load Regulation and the antifreeze problem of adapting to, need to consider between the row of air cooling system, automatic isolating valve to be set, automatically adjust the effective heat exchange area of air cooling by the switch of valve according to turbine back pressure situation, backwater preheater and absorption heat pump and air cooling device load proportion situation, and the blower fan start-stop by air cooling and speed change are regulated the air cooling load automatically, make it to be complementary, guarantee system stable operation with backwater preheater and absorption heat pump heat of condensation extraction load.When non-heat supply running, backwater preheater and absorption type heat air pump inoperative, the discharging of the water in the system is clean, and this moment, turbine discharge all cooled off by the direct air cooling condensing system.
Scheme two:
Be illustrated in figure 5 as the high efficiente callback power station steam turbine exhausted spare heat cogeneration heating system schematic representation of band reheater heating heat supply water, on the basis of scheme one, the absorption heat pump hot water outlet is set up a reheater 21, further heats the hot water temperature who promotes the heat pump outlet by extracted steam from turbine (can adopt same steam (being illustrated as same road) also can adopt different pressures with absorption heat pump).Be suitable for the demanding place of heat supply water water-exit temperature, absorption heat pump can't satisfy the requirement of final heat supply coolant-temperature gage, again by the direct heat temperature raising of steam.
Backwater preheater and absorption heat pump and reheater can be single cover or many covers in the scheme of above high efficiente callback power station steam turbine exhausted spare heat cogeneration heating system.Absorption heat pump can be single-effect type absorption heat pump, dual effect absorption heat pump or two-stage type absorption heat pump.
Claims (5)
1. high efficiente callback power station steam turbine exhausted spare heat cogeneration heating system, comprise steam turbine (1), turbine discharge house steward (2), direct air cooling condensing system (3), with thermal field institute (4), hot water effluent's pipeline system (5), absorption heat pump (6-2) and hot water backwater's pipeline system (7), described absorption heat pump (6-2) comprises vaporizer (14), adsorber (15), generator (16) and condenser (17), it is characterized in that: the turbine discharge house steward (2) that steam turbine (1) is discharged is divided into three the tunnel: the turbine discharge of leading up to advances direct air cooling catch tank (8) and links to each other with direct air cooling condensing system (3), the turbine discharge of leading up to advances backwater preheater tube (19) and links to each other with backwater preheater (18), and another road is advanced absorption heat pump evaporator tube (9) by turbine discharge and linked to each other with the vaporizer (14) of absorption heat pump (6-2); The low-temperature water heating of returning with thermal field institute (4) links to each other with backwater preheater (18) by hot water backwater's pipeline system (7), the hot water that comes out from backwater preheater (18) links to each other with the adsorber (15) of absorption heat pump (6-2) by the laggard absorption heat pump absorber tube of backwater preheating (13), and the high-temperature-hot-water that the condenser (17) of self absorption formula heat pump (6-2) comes out passes through hot water effluent's pipeline system (5) and links to each other with thermal field institute (4).
2. a kind of high efficiente callback power station steam turbine exhausted spare heat cogeneration heating system according to claim 1 is characterized in that: set up a reheater (21) at described absorption heat pump (6-2) hot water outlet.
3. a kind of high efficiente callback power station steam turbine exhausted spare heat cogeneration heating system according to claim 1 is characterized in that: described backwater preheater (18) and/or absorption heat pump (6-2) are single cover or many covers.
4. a kind of high efficiente callback power station steam turbine exhausted spare heat cogeneration heating system according to claim 2 is characterized in that: described reheater (21) is single cover or many covers.
5. according to one of them described a kind of high efficiente callback power station steam turbine exhausted spare heat cogeneration heating system of claim 1 ~ 4, it is characterized in that: described absorption heat pump (6-2) 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 |
|---|---|---|---|
| CN2011100843278A CN102182527A (en) | 2011-04-06 | 2011-04-06 | Heat power combined heat supply system for efficiently recycling residual heat exhausted by steam turbine in power station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100843278A CN102182527A (en) | 2011-04-06 | 2011-04-06 | Heat power combined heat supply system for efficiently recycling residual heat exhausted by steam turbine in power station |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696820A (en) * | 2013-12-20 | 2014-04-02 | 清华大学 | Exhausted steam waste heat recovery unit |
| CN104359223A (en) * | 2014-11-28 | 2015-02-18 | 中国华能集团公司 | System and method for using waste steam of steam turbine as thermal medium of air heater of power plant boiler |
| CN106437907A (en) * | 2016-08-16 | 2017-02-22 | 华电电力科学研究院 | Direct air cooling unit exhaust steam waste heat recovery device and method |
| CN106437906A (en) * | 2016-08-16 | 2017-02-22 | 华电电力科学研究院 | Circulation water waste heat recycling device and method for indirect air cooling unit |
| DE102021124166A1 (en) | 2021-09-17 | 2023-03-23 | Michael Barnick | Plant for combined heat and power, especially with high efficiency through process control |
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| CN101832156A (en) * | 2010-05-10 | 2010-09-15 | 江苏双良空调设备股份有限公司 | Condensation heat recovering and central heating supply system of power plant direct air cooling unit |
| CN202023600U (en) * | 2011-04-06 | 2011-11-02 | 双良节能系统股份有限公司 | CHP (combined heat and power) heat supply system for efficiently recovering exhaust steam waste heat of power station steam turbine |
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2011
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH03906A (en) * | 1989-05-26 | 1991-01-07 | Kawasaki Heavy Ind Ltd | Feed water preheating method and device in steam generating plant |
| JP2007064050A (en) * | 2005-08-30 | 2007-03-15 | Hitachi Eng Co Ltd | Waste heat utilizing facility for steam turbine plant |
| CN101231004A (en) * | 2008-02-28 | 2008-07-30 | 清华大学 | Large temperature-difference central heating system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696820A (en) * | 2013-12-20 | 2014-04-02 | 清华大学 | Exhausted steam waste heat recovery unit |
| CN103696820B (en) * | 2013-12-20 | 2016-08-17 | 清华大学 | A kind of exhaust steam residual heat reclaims unit |
| CN104359223A (en) * | 2014-11-28 | 2015-02-18 | 中国华能集团公司 | System and method for using waste steam of steam turbine as thermal medium of air heater of power plant boiler |
| CN104359223B (en) * | 2014-11-28 | 2015-09-09 | 中国华能集团公司 | System and method using exhaust steam in steam turbine as steam air heater of utility boiler thermal medium |
| CN106437907A (en) * | 2016-08-16 | 2017-02-22 | 华电电力科学研究院 | Direct air cooling unit exhaust steam waste heat recovery device and method |
| CN106437906A (en) * | 2016-08-16 | 2017-02-22 | 华电电力科学研究院 | Circulation water waste heat recycling device and method for indirect air cooling unit |
| CN106437907B (en) * | 2016-08-16 | 2018-08-07 | 华电电力科学研究院 | A kind of Direct Air-cooled Unit exhausted spare heat retracting device and method |
| DE102021124166A1 (en) | 2021-09-17 | 2023-03-23 | Michael Barnick | Plant for combined heat and power, especially with high efficiency through process control |
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Application publication date: 20110914 |