CN201671669U - Condensation heat recovering central heating system of direct air cooling unit for power plant - Google Patents
Condensation heat recovering central heating system of direct air cooling unit for power plant Download PDFInfo
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- CN201671669U CN201671669U CN 201020188198 CN201020188198U CN201671669U CN 201671669 U CN201671669 U CN 201671669U CN 201020188198 CN201020188198 CN 201020188198 CN 201020188198 U CN201020188198 U CN 201020188198U CN 201671669 U CN201671669 U CN 201671669U
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- direct air
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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]
Abstract
The utility model relates to a condensation heat recovering central heating system of a direct air cooling unit for a power plant, which comprises a steam turbine (1), a steam turbine exhaust manifold (2), a direct air cooling condensation system (3), a heat utilizing area (4), a hot water supply pipeline system (5), an absorption type heat pump unit (6-2), a pipe (7) through which steam exhausted by the steam turbine enters the direct air cooling condensation system and relevant connecting pipelines, wherein the steam turbine exhaust manifold is provided with two pipes of low-pressure steam exhausted by the steam turbine (1), one pipe is connected with the direct air cooling condensation system (3) by the pipe (7) through which the steam exhausted by the steam turbine enters the direct air cooling steam condensation system, the other pipe is connected with a water cooling condensation heat exchanger (9) by a turbine steam exhausting and water inflowing condensation steam heat exchanger pipe (8), and the water cooling condensation heat exchanger (9) is communicated with an evaporator (11) of the absorption type heat pump unit (6-2) by a residual hot water circulation pipeline system (10). The condensation heat recovering central heating system of the direct air cooling unit for the power plant can effectively recover and utilize low-grade condensation heat of exhausted steam of the direct air cooling power plant, reduce the requirement on mounting position of the absorption type heat pump, guarantee security of the power generating system, and reduce the pressure loss of steam exhausting pipelines and the running cost for heating.
Description
(1) technical field
The utility model relates to a kind of power plant Direct Air-cooled Unit heat of condensation and reclaims central heating system, is used to reclaim the power station steam turbine exhausted spare heat.Belong to air conditioner technical field.
(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.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, need be discharged in the atmosphere by air cooling system, influence the overall efficiency of using energy source.
As shown in Figure 1, thermoelectricity plant in Direct Air-cooled Unit, central heat supply hot water generally adopts the medium pressure steam of power plant steam turbine extraction (to be generally 0.2～1.0MPa) by the direct heat hot water central heat supply of vapor-water heat exchanger at present, low-grade exhausted spare heat behind the steam turbine power generation can't utilize, be discharged in the atmosphere by air cooling system, not only influence the overall efficiency of using energy source, also can produce thermo-pollution.Because exhaust line is long, the pipeline crushing was big, considers factors such as preventing freeze in winter simultaneously, causes winter condition actual motion condensation back pressure higher, influences gross coal consumption rate when Direct Air-cooled Unit itself was moved in the winter time in addition.In order effectively to utilize heat of condensation, also has a kind of mode at present as shown in Figure 2, turbine discharge is directly fed absorption heat pump vaporizer tube side, adopt the absorption heat pump technology (to be generally 0.2～1.0MPa) driving by drawing gas of steam turbine, extraction enters the turbine discharge heat of condensation of absorption heat pump vaporizer, heating central heat supply hot water is realized the extraction of turbine discharge heat of condensation, realizes energy-saving benefit.But because the steam specific volume is big during winter operation, the flow velocity height, the pipeline crushing is big, and this kind mode reclaims heat of condensation and requires absorption type heat pump assembly mounting point and turbine discharge house steward closer.In addition turbine discharge directly enters the absorption heat pump vaporizer, makes absorption heat pump as the contact of a power generation system part closely, to absorption heat pump self reliability requirement height, otherwise influences the Security of power generation system.How more effectively to reclaim low-grade heat of condensation, be used for central heat supply, reduce medium pressure steam consumption, guarantee power generation system safety simultaneously, reduce the generating electricity in winter back pressure, realize that the economic and social benefit of energy-conservation, dilatation, reduction of discharging becomes one of research direction that the direct air cooling of central heat supply demand power plant is arranged.
(3) summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, provide a kind of effective recycling direct air cooling power plant low-grade steam discharge heat of condensation, reduce absorption heat pump mounting point requirement, guarantee the power generation system Security, reduce the blow-off line pressure loss and heat supply running cost, the power plant's Direct Air-cooled Unit heat of condensation that improves power plant's overall economic efficiency reclaims central heating system.
The purpose of this utility model is achieved in that a kind of power plant Direct Air-cooled Unit heat of condensation reclaims central heating system, comprise steam turbine, the turbine discharge house steward, the direct air cooling condensing system, use thermal field institute, the heat supply water piping system, the absorption type heat pump assembly, turbine discharge advances direct air cooling condensing system pipe and relevant connection pipeline, described system has additional a water-cooled condensing heat exchanger, the low pressure steam pipe of on the turbine discharge house steward steam turbine being discharged is divided into two the tunnel, the turbine discharge of leading up to advances direct air cooling condensing system pipe and links to each other with the direct air cooling condensing system, another road links to each other with water-cooled condensing heat exchanger by turbine discharge water inlet condensation vapour Tube Sheet of Heat Exchanger, the remaining hot water circulating pipe system is communicated with condensation vapour heat exchanger with the vaporizer of absorption type heat pump assembly, remaining hot water enters the interior heat release of vaporizer heat exchanging tube of absorption heat pump, enters the heat absorption of water-cooled condensing heat exchanger.
The beneficial effects of the utility model are:
The utility model adopts the absorption heat pump technology to reclaim the turbine discharge heat of condensation, utilize (general 0.2～1.0MPa) steam (the 60% left and right sides heat) driving of drawing gas of steam turbine, power station steam turbine is discharged low pressure steam by water-cooled condensing heat exchanger heating remaining hot water, remaining hot water enters heat release in the absorption heat pump vaporizer heat exchanging tube by the remaining hot water circulating pipe system, 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), improve cogeneration central heating system comprehensive energy utilization ratio, not increasing the maximum heat capacity about 70% of raising heat pump part under the thermal source situation, realize dilatation, energy-conservation, economic benefit and social benefits such as reduction of discharging.Because generating back turbine discharge is by the conversion of remaining hot water system, absorption heat pump and blow-off line distance can be far away, require low to the absorption heat pump mounting point.Absorption heat pump does not directly contact with turbine discharge,, can not have much impact power plant's safety in operation height to power generation system even the absorption heat pump heating has fault yet.In the winter time during heating operation, because turbine discharge is divided into two the tunnel, leading up to the remaining hot water system enters absorption heat pump and realizes heat? recovery, another road enters direct air condensed steam device, under the constant prerequisite of turbine discharge amount, enters the direct air condensed steam device steam flow and reduces, the pipeline crushing reduces, do not consider factor such as preventing freeze in winter, can reduce operation condensation back pressure, reducing gross coal consumption rate.
(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 directly entered absorption heat pump recovery waste heat central heating system schematic representation for adopt turbine exhaust steam in electric power plant in the past.
Fig. 3 is that the utility model power plant Direct Air-cooled Unit heat of condensation reclaims the central heating system schematic representation.
Fig. 4 is that power plant's Direct Air-cooled Unit heat of condensation of the utility model band vapor-water heat exchanger heating heat supply water reclaims the central heating system schematic representation.
Among the figure:
(5) embodiment
Scheme one:
Be illustrated in figure 3 as a kind of power plant Direct Air-cooled Unit heat of condensation and reclaim the central heating system schematic representation.It by steam turbine 1, turbine discharge house steward 2, direct air cooling condensing system 3, advance direct air cooling condensing system pipe 7, turbine discharge water inlet condensation vapour Tube Sheet of Heat Exchanger 8, water-cooled condensing heat exchanger 9, remaining hot water circulating pipe system 10 and relevant connection pipeline and control system (not shown) etc. with thermal field institute 4, heat supply water piping system 5, absorption type heat pump assembly 6-2, turbine discharge and constitute.Described absorption type heat pump assembly 6-2 comprises generator 14, condenser 13, vaporizer 11 and adsorber 12, be characterized in the low pressure steam pipe that steam turbine 1 is discharged is divided into two the tunnel, the turbine discharge of leading up to advances direct air cooling condensing system pipe 7 and links to each other with direct air cooling condensing system 3, and another road links to each other with water-cooled condensing heat exchanger 9 by turbine discharge water inlet condensation vapour Tube Sheet of Heat Exchanger 8.When the heat supply operating mode is moved, (be generally 0.2～1.0MPa) steam enters absorption type heat pump assembly 6-2 as driving heat source generator 14 heat releases with extracted steam from turbine.Turbine discharge enters heating remaining hot water in the water-cooled condensing heat exchanger 9 by turbine discharge water inlet condensation vapour Tube Sheet of Heat Exchanger 8, remaining hot water enters heat release in vaporizer 11 heat exchanging tubes of absorption type heat pump assembly 6-2 by remaining hot water circulating pipe system 10, realize the extraction of turbine discharge waste heat.Add the heat supply water of heat absorber 12 and condenser 13 by absorption type heat pump assembly 6-2, 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 3 coolings of direct air cooling condensing system, in actual heating operation 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 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 extract load and be complementary, guarantee system stable operation with the absorption heat pump heat of condensation.When non-heating season moves, the remaining hot water system stopped or the discharging of the water in the system is clean, water-cooled condensing heat exchanger is not worked, and this moment, turbine discharge all cooled off by the direct air cooling condensing system.
Scheme two:
The power plant's Direct Air-cooled Unit heat of condensation that is illustrated in figure 4 as band vapor-water heat exchanger heating heat supply water reclaims the central heating system schematic representation, on the basis of scheme one, the heat pump heat supply water out is set up a vapor-water heat exchanger B15, further heats the heat supply coolant-temperature gage that 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 heating water water-exit temperature, absorption heat pump can't satisfy the requirement of final heating coolant-temperature gage, is passing through the direct heat temperature raising of steam.
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 cogeneration system.Can be single-effect type absorption heat pump, dual effect absorption heat pump, two-stage type absorption heat pump.
Claims (5)
1. power plant's Direct Air-cooled Unit heat of condensation reclaims central heating system, comprise steam turbine (1), turbine discharge house steward (2), direct air cooling condensing system (3), with thermal field institute (4), heat supply water piping system (5), absorption type heat pump assembly (6-2), turbine discharge advances direct air cooling condensing system pipe (7) and relevant connection pipeline, it is characterized in that: described system has additional a water-cooled condensing heat exchanger (9), the low pressure steam pipe of on the turbine discharge house steward steam turbine (1) being discharged is divided into two the tunnel, the turbine discharge of leading up to advances direct air cooling condensing system pipe (7) and links to each other with direct air cooling condensing system (3), another road links to each other with water-cooled condensing heat exchanger (9) by turbine discharge water inlet condensation vapour Tube Sheet of Heat Exchanger (8), and remaining hot water circulating pipe system (10) is communicated with condensation vapour heat exchanger (9) with the vaporizer (11) of absorption type heat pump assembly (6-2).
2. a kind of power plant according to claim 1 Direct Air-cooled Unit heat of condensation reclaims central heating system, and it is characterized in that: described absorption type heat pump assembly (6-2) comprises generator (14), condenser (13), vaporizer (11) and adsorber (12).
3. a kind of power plant according to claim 1 Direct Air-cooled Unit heat of condensation reclaims central heating system, it is characterized in that: set up a vapor-water heat exchanger (B15) at absorption type heat pump assembly (6-2) heat supply water out.
4. a kind of power plant according to claim 1 and 2 Direct Air-cooled Unit heat of condensation reclaims central heating system, and it is characterized in that: described absorption type heat pump assembly (6-2) is single-effect type dual effect type or two-stage type.
5. a kind of power plant according to claim 1 and 2 Direct Air-cooled Unit heat of condensation reclaims central heating system, it is characterized in that: described absorption type heat pump assembly (6-2) is single cover or many covers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020188198 CN201671669U (en) | 2010-05-10 | 2010-05-10 | Condensation heat recovering central heating system of direct air cooling unit for power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201020188198 CN201671669U (en) | 2010-05-10 | 2010-05-10 | Condensation heat recovering central heating system of direct air cooling unit for power plant |
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| CN201671669U true CN201671669U (en) | 2010-12-15 |
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| CN 201020188198 Expired - Fee Related CN201671669U (en) | 2010-05-10 | 2010-05-10 | Condensation heat recovering central heating system of direct air cooling unit for power plant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN105221224A (en) * | 2014-06-10 | 2016-01-06 | 国网山西省电力公司电力科学研究院 | A kind of turbine discharge residual neat recovering system |
-
2010
- 2010-05-10 CN CN 201020188198 patent/CN201671669U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN105221224A (en) * | 2014-06-10 | 2016-01-06 | 国网山西省电力公司电力科学研究院 | A kind of turbine discharge residual neat recovering system |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101215 Termination date: 20180510 |
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| CF01 | Termination of patent right due to non-payment of annual fee |