CN203809073U - Waste heat utilization system for gas-steam combined cycle power generator set - Google Patents
Waste heat utilization system for gas-steam combined cycle power generator set Download PDFInfo
- Publication number
- CN203809073U CN203809073U CN201420255167.8U CN201420255167U CN203809073U CN 203809073 U CN203809073 U CN 203809073U CN 201420255167 U CN201420255167 U CN 201420255167U CN 203809073 U CN203809073 U CN 203809073U
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- gas
- steam
- combined cycle
- generator set
- heat supply
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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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Abstract
The utility model relates to the technical field of industrial energy conservation and emission reduction and particularly discloses a waste heat utilization system for a gas-steam combined cycle power generator set. The waste heat utilization system comprises steam which is discharged from the gas-steam combined cycle power generator set and enters a condenser. The waste heat utilization system is characterized in that the water outlet pipe of the condenser is parallelly connected with a circulation water pump, a water cooling tower, a heat supply network water return pipe and a heat supply initial station communicated with a heat supply network circulating water pump. The heat supply initial station is connected with a steam turbine. The waste heat utilization system has the advantages that the steam discharge loss of the steam turbine is completely recycled, zero cold source loss is achieved, the heat efficiency of the whole system can reach more than 90% during a heat supply stage, and the national requirements of energy conservation and emission reduction are satisfied.
Description
(1) technical field
The utility model relates to industrial energy saving emission-reduction technology field, particularly a kind of Gas-steam Combined Cycle generator set bootstrap system.
(2) background technique
Conventional Large Gas-Steam Combined Cycle circulating generation unit, workflow is that air enters firing chamber and rock gas mixed combustion after gas turbine blower compression, when entering combustion gas turbine, the combustion gas after burning does work, high-temperature flue gas after acting enters exhaust heat boiler, exhaust heat boiler absorbs high-temperature flue gas waste heat for generating steam, enter the steam turbine acting coaxial with gas turbine, common drawing generator generating, the steam of finishing merit enters after vapour condenser condenses by cooling tower is cooling and by water pump, returns to boiler circulation heat absorption again.
Although Gas-steam Combined Cycle has improved the thermal efficiency of system, but the steam discharge after acting, in coagulator condensation process, discharge a large amount of latent heats of vaporization again and cause heat waste and system thermal efficiency to reduce, how reclaiming exhausted spare heat becomes the key that system thermal efficiency further improves.
(3) summary of the invention
The utility model is in order to make up the deficiencies in the prior art, and a kind of simple in structure, Gas-steam Combined Cycle generator set bootstrap system that heat utilization rate is high is provided.
The utility model is achieved by the following technical solution:
A kind of Gas-steam Combined Cycle generator set bootstrap system, comprise from Gas-steam Combined Cycle generator set out, enter the steam of vapour condenser, it is characterized in that: the heat supply initial station that the outlet pipe of described vapour condenser is connected in parallel to circulating water pump, cooling tower, heat supply network return pipe and is communicated with by circulation pump of heat-supply network, heat supply connects steam turbine at first stop.
The utility model is for the exhausted spare heat of complete recovered steam turbine, do not changing under the prerequisite of fuel gas-steam unit integral arrangement, according to heat supply network water conservancy situation, vapour condenser is strengthened to transformation, precision processing device of condensation water is carried out to high temperature transformation, and steam turbine system is carried out to high back pressure transformation.
More excellent scheme of the present utility model is:
Described Gas-steam Combined Cycle generator set is by filter screen, to connect the gas compressor of air duct, gas compressor connects combustion gas turbine by firing chamber, the fume pipe of combustion gas turbine connects exhaust heat boiler, the steam line of exhaust heat boiler connects steam turbine, steam turbine comprises the high-pressure cylinder coaxial with gas turbine, intermediate pressure cylinder and low pressure (LP) cylinder, and steam turbine connects generator.
Described back pressure of condenser is 30-60kPa or 5-7kPa.
The water outlet of described vapour condenser connects circulating water pump by valve A, by valve B, connects cooling tower, by valve C, is communicated with heat supply network return pipe, by valve D, is communicated with circulation pump of heat-supply network.
The low pressure rotor of described low pressure (LP) cylinder is high back pressure heat supply rotor or pure condensate rotor, low pressure (LP) cylinder flow passage component is high back pressure passage component or pure condensate passage component, low pressure (LP) cylinder exhaust temperature is 69-86 ℃ or 30-45 ℃, low pressure (LP) cylinder is met to the through-flow transformation of high back pressure and low back pressure operation simultaneously, design and produce high back pressure heat supply rotor.
The utility model has reclaimed the steam discharge loss of steam turbine completely, and realizing cold source energy is zero, and the thermal efficiency of heat supply phase whole system reaches more than 90%, meets the needs that national energy-saving reduces discharging.
(4) accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described.
Fig. 1 is structural representation of the present utility model.
In figure, 1 air duct, 2 filter screens, 3 gas compressors, 4 firing chambers, 5 combustion gas turbines, 6 exhaust heat boilers, 7 high-pressure cylinders, 8 intermediate pressure cylinders, 9 low pressure (LP) cylinders, 10 generators, 11 vapour condenser, 12 circulating water pump, 13 cooling towers, 14 heat supply network return pipes, 15 circulation pump of heat-supply networks, 16 heat supply initial stations, 17 valve A, 18 valve B, 19 valve C, 20 valve D.
(5) embodiment
Accompanying drawing is a kind of specific embodiment of the present utility model.This embodiment comprise from Gas-steam Combined Cycle generator set out, enter the steam of vapour condenser 11, the heat supply initial station 16 that the outlet pipe of described vapour condenser 11 is connected in parallel to circulating water pump 12, cooling tower 13, heat supply network return pipe 14 and is communicated with by circulation pump of heat-supply network 15, heat supply initial station 16 connects steam turbine; Described Gas-steam Combined Cycle generator set is for connecting the gas compressor 3 of air duct 1 by filter screen 2, gas compressor 3 connects combustion gas turbine 5 by firing chamber 4, the fume pipe of combustion gas turbine 5 connects exhaust heat boiler 6, the steam line of exhaust heat boiler 6 connects steam turbine, steam turbine comprises the high-pressure cylinder coaxial with gas turbine 7, intermediate pressure cylinder 8 and low pressure (LP) cylinder 9, and steam turbine connects generator 10; Described vapour condenser 11 back pressures are 30-60kPa or 5-7kPa; The water outlet of described vapour condenser 11 connects circulating water pump 12 by valve A17, by valve B18, connects cooling tower 13, by valve C19, is communicated with heat supply network return pipe 14, by valve D20, is communicated with circulation pump of heat-supply network 15; The low pressure rotor of described low pressure (LP) cylinder 9 is high back pressure heat supply rotor or pure condensate rotor, and low pressure (LP) cylinder flow passage component is high back pressure passage component or pure condensate passage component, and low pressure (LP) cylinder 9 exhaust temperatures are 69-86 ℃ or 30-45 ℃.
In the heating phase, low pressure rotor is replaced by high back pressure heat supply rotor, and low pressure (LP) cylinder flow passage component is synchronously replaced by high back pressure passage component, and back pressure of condenser rises to 30-60kPa by 5-7kPa, and low pressure (LP) cylinder exhaust temperature rises to 69-86 ℃ by 30-45 ℃.Throttle down A, B, Open valve C, D, switch to by the circulation of vapour condenser the hot water pipe net circulating water loop that pumps for hot water supply net is set up, and forms new " heat-water " exchange system.After circulating water loop has switched, the water flow that enters vapour condenser is down to 9000-12000t/h, back pressure of condenser is through the heating for the first time of vapour condenser, heat supply network circulating water temperature is promoted to 66-83 ℃ by 50 ℃, then after boosting, pumps for hot water supply net sends into heat supply initial station, by the machine or draw gas as the occasion requires heat supply network supply water temperature is further fed to heat supply network one time after heating.After the heat supply phase finishes, throttle down C, D, Open valve A, B, pumps for hot water supply net and heat exchangers for district heating are out of service, circulation is switched to cooling tower circulating water system by heat supply network circulation, cylinder pressure flow passage component recovers pure condensate passage component, and low pressure rotor is replaced by pure condensate rotor, and back pressure of condenser returns to 5-7kPa.
Claims (5)
1. a Gas-steam Combined Cycle generator set bootstrap system, comprise from Gas-steam Combined Cycle generator set out, enter the steam of vapour condenser (11), it is characterized in that: the heat supply initial station (16) that the outlet pipe of described vapour condenser (11) is connected in parallel to circulating water pump (12), cooling tower (13), heat supply network return pipe (14) and is communicated with by circulation pump of heat-supply network (15), heat supply initial station (16) connects steam turbine.
2. Gas-steam Combined Cycle generator set bootstrap system according to claim 1, it is characterized in that: described Gas-steam Combined Cycle generator set is for connecting the gas compressor (3) of air duct (1) by filter screen (2), gas compressor (3) connects combustion gas turbine (5) by firing chamber (4), the fume pipe of combustion gas turbine (5) connects exhaust heat boiler (6), the steam line of exhaust heat boiler (6) connects steam turbine, steam turbine comprises the high-pressure cylinder coaxial with gas turbine (7), intermediate pressure cylinder (8) and low pressure (LP) cylinder (9), steam turbine connects generator (10).
3. Gas-steam Combined Cycle generator set bootstrap system according to claim 1 and 2, is characterized in that: described vapour condenser (11) back pressure is 30-60kPa or 5-7kPa.
4. Gas-steam Combined Cycle generator set bootstrap system according to claim 1 and 2, it is characterized in that: the water outlet of described vapour condenser (11) is by valve A(17) connection circulating water pump (12), by valve B(18) connection cooling tower (13), by valve C(19) be communicated with heat supply network return pipe (14), by valve D(20) connection circulation pump of heat-supply network (15).
5. Gas-steam Combined Cycle generator set bootstrap system according to claim 2, it is characterized in that: the low pressure rotor of described low pressure (LP) cylinder (9) is high back pressure heat supply rotor or pure condensate rotor, low pressure (LP) cylinder (9) flow passage component is high back pressure passage component or pure condensate passage component, and low pressure (LP) cylinder (9) exhaust temperature is 69-86 ℃ or 30-45 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420255167.8U CN203809073U (en) | 2014-05-19 | 2014-05-19 | Waste heat utilization system for gas-steam combined cycle power generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420255167.8U CN203809073U (en) | 2014-05-19 | 2014-05-19 | Waste heat utilization system for gas-steam combined cycle power generator set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203809073U true CN203809073U (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420255167.8U Expired - Fee Related CN203809073U (en) | 2014-05-19 | 2014-05-19 | Waste heat utilization system for gas-steam combined cycle power generator set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967544A (en) * | 2014-05-19 | 2014-08-06 | 山东泓奥电力科技有限公司 | Waste heat utilization system of gas-steam combined cycle generator set |
-
2014
- 2014-05-19 CN CN201420255167.8U patent/CN203809073U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967544A (en) * | 2014-05-19 | 2014-08-06 | 山东泓奥电力科技有限公司 | Waste heat utilization system of gas-steam combined cycle generator set |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 |
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| CF01 | Termination of patent right due to non-payment of annual fee |