CN109322716B - Gas-steam combined cycle high back pressure heat supply unit and rotor-changing non-stop combustion machine method - Google Patents
Gas-steam combined cycle high back pressure heat supply unit and rotor-changing non-stop combustion machine method Download PDFInfo
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- CN109322716B CN109322716B CN201811203654.9A CN201811203654A CN109322716B CN 109322716 B CN109322716 B CN 109322716B CN 201811203654 A CN201811203654 A CN 201811203654A CN 109322716 B CN109322716 B CN 109322716B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000002485 combustion reaction Methods 0.000 title claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- 239000002918 waste heat Substances 0.000 claims abstract description 36
- 239000007789 gas Substances 0.000 claims abstract description 19
- 238000000605 extraction Methods 0.000 claims abstract description 12
- 230000009467 reduction Effects 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims 2
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000010248 power generation Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
- F01K17/025—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic in combination with at least one gas turbine, e.g. a combustion gas turbine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/13—Heat from a district heating network
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Control Of Turbines (AREA)
Abstract
The utility model provides a gas-steam combined cycle high back pressure heat supply unit and a method for changing a rotor without stopping a gas turbine, which comprises a waste heat boiler, a steam turbine, a condenser and a heating network heater, wherein the waste heat boiler generates high pressure steam and low pressure steam by exhaust heating of the gas turbine; the steam turbine applies work through high-pressure steam rotation, and high-back-pressure steam extraction is carried out for heating circulating water of a heat supply network; the steam turbine is provided with a high-pressure bypass, and the high-pressure bypass is used for reducing the temperature and the pressure of high-temperature steam and then sending the high-temperature steam into the heat supply network heater when the steam turbine is stopped; the condenser adopts the steam turbine to discharge steam and heats the return water of the heat supply network. During the replacement of the steam turbine rotor, the steam turbine is only stopped, the gas turbine, the waste heat boiler and other parts run normally, and high-pressure steam generated by the waste heat boiler is used for heat supply after being subjected to temperature and pressure reduction by the high side, so that the gas-steam combined cycle unit is not stopped, the purpose of cogeneration is achieved, and the benefit of a power plant is increased.
Description
Technical Field
The present disclosure relates to a gas-steam combined cycle high back pressure heat supply unit and a method for changing a rotor without stopping a combustion engine.
Background
The combined heat and power generation is one of important ways for accelerating the energy-saving step of the gas-steam combined cycle unit, wherein the energy-saving effect is most obvious by high-back-pressure heat supply transformation. The combined heat and power generation centralized heating mode can solve the heating problem of large and medium-sized cities and can greatly improve the heat efficiency of the unit.
In order to realize high back pressure heat supply of the unit, a specially designed heat supply rotor is adopted for the gas-steam combined cycle unit in the heat supply period, and the original rotor is replaced after the heat supply is finished. The double-rotor heat supply steam turbine is adopted, so that the loss of a cold source can be reduced in the heating period, and the economic benefit of a power plant is improved. However, the technology also has the following defects: because the unit needs to be converted from a heating period to a non-heating period and from the non-heating period to the heating period every year, the unit needs to be shut down twice every year to replace the rotor, the rotor replacement time is long, the unit operation time is occupied, and the overhaul and maintenance cost is increased. Meanwhile, the existing method for replacing the rotor causes the shutdown of the whole gas-steam combined cycle unit, influences the generated energy and causes corresponding power generation loss, and reduces the benefit of a power plant.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a gas-steam combined cycle high back pressure heat supply unit and a method for changing a rotor without stopping a gas turbine.
In order to achieve the purpose, the technical scheme of the disclosure is as follows:
a gas-steam combined cycle high back pressure heat supply unit includes:
a waste heat boiler configured to generate high pressure steam and low pressure steam by gas turbine exhaust heating;
a steam turbine configured to perform work by high pressure steam rotation and perform high back pressure steam extraction for heating of heat supply network circulating water;
the steam turbine is provided with a high-pressure bypass, and the high-pressure bypass is used for reducing the temperature and the pressure of high-temperature steam and then sending the high-temperature steam into the heat supply network heater when the steam turbine is stopped;
the condenser is configured to heat the return water of the heat supply network by adopting the exhaust steam of the steam turbine and send the heated return water of the heat supply network to the heat supply network heater;
a heat supply network heater configured to heat supply network circulating water using low-pressure steam and turbine extraction steam as heating steam sources when a turbine is operating normally; and
when the steam turbine is stopped, the low-pressure steam and the high-pressure steam after temperature and pressure reduction are used as heating steam sources to heat the circulating water of the heat supply network.
Further, when the steam turbine is stopped, the return water of the heat supply network is directly conveyed to the heat supply network heater for heating.
Furthermore, the condenser is provided with a circulating water system, and the circulating water system is used for cooling and condensing the steam discharged by the steam turbine during the period of non-heat supply of the unit.
Furthermore, the heat supply network heater is also connected with a water return port of the waste heat boiler.
Furthermore, the low-pressure steam is also connected with a steam supplementing port of the steam turbine.
A method for a gas-steam combined cycle unit to heat a rotor without stopping combustion engine comprises the gas-steam combined cycle high back pressure heat supply unit, and the method specifically comprises the following steps:
gradually opening a high-pressure bypass of a steam turbine and a heat supply steam extraction stop valve, reducing the temperature and the pressure of high-pressure steam generated by a waste heat boiler through the high-pressure bypass, sending the high-pressure steam into a heat supply network heater, closing a steam inlet high-pressure regulating valve of the steam turbine until the load of the steam turbine reaches zero, opening a brake of the steam turbine, stopping the steam turbine, disconnecting a generator, and replacing a rotor of the stopped steam turbine;
after the operation of replacing the rotor of the steam turbine is finished, the condenser supplies circulating water to a heat supply network, the steam turbine is started to rotate, the generators are arranged in parallel, and the load is connected.
Furthermore, in the process of replacing the rotor of the steam turbine, the load of the gas turbine is kept unchanged all the time, low-pressure steam generated by the waste heat boiler is used for heating circulating water of the heat supply network, and high-pressure steam generated by the waste heat boiler is used for heating the circulating water of the heat supply network after temperature and pressure reduction.
Further, when the steam turbine is in the run-on state, the high-pressure bypass and the heat supply steam extraction stop door are gradually closed according to the main steam pressure until the main steam pressure is completely closed.
Further, in the starting process of the steam turbine, low-pressure steam and part of high-pressure steam generated by the waste heat boiler are always used for heating circulating water of the heat supply network.
Further, after the steam turbine is started normally, the low-pressure steam generated by the waste heat boiler is switched to a steam supplementing operation state for the steam turbine, and the flow of the low-pressure steam entering a heat supply network of the condenser is adjusted to maintain the exhaust steam back pressure of the steam turbine, so that the steam turbine enters a high-back-pressure circulating water heat supply operation mode.
Compared with the prior art, the beneficial effect of this disclosure is:
the steam turbine heat pump system can realize power generation and heat supply by utilizing the gas turbine, the waste heat boiler and the steam turbine bypass under the condition that the rotor is replaced only by stopping the steam turbine, the whole unit is not stopped, the generating capacity and the heat supply quantity of the unit are increased, the income of a power plant is improved, and therefore the influence of the whole set of unit on the operation economy of the whole plant due to the fact that the rotor is replaced and the whole unit is stopped is greatly reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic diagram of a system configuration of the present disclosure;
in the figure: 1 exhaust-heat boiler, 2 steam turbines, 3 high-pressure bypasses, 4 condensers, 5 heat supply network heaters and 6 generators.
Detailed Description
The present disclosure is further described with reference to the following detailed description of illustrative embodiments and accompanying drawings.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the parts or elements of the present disclosure, and do not refer to any parts or elements of the present disclosure, and are not to be construed as limiting the present disclosure.
In the present disclosure, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present disclosure can be determined on a case-by-case basis by persons skilled in the relevant art or technicians, and are not to be construed as limitations of the present disclosure.
As introduced by the background art, in the prior art, the problem that the whole unit stops running due to the stop of a steam turbine during the rotor replacement in the high-back-pressure double-rotor interchange heat supply transformation of a conventional gas-steam combined cycle unit exists, and in order to solve the technical problem, the disclosure provides a gas-steam combined cycle high-back-pressure heat supply unit and a method for not stopping a combustion engine during the rotor replacement of the steam turbine.
As shown in fig. 1, a gas-steam combined cycle high back pressure heat supply unit comprises a waste heat boiler 1, a steam turbine 2, a condenser 4 and a heat supply network heater 5;
And a temperature and pressure reducing device is arranged on the steam turbine high-pressure bypass 3 and is used for reducing the temperature and the pressure of high-pressure steam.
And the circulating water system is used for cooling and condensing the exhausted steam of the steam turbine 2 during the non-heat supply period of the unit.
In the disclosure, during the high back pressure heat supply period of the unit, when the unit operates under normal working conditions, natural gas enters a combustion chamber of the gas turbine and is mixed and combusted with high-pressure air pressed by the air compressor to generate high-temperature and high-pressure airflow to push the gas turbine to rotate to do work. Exhaust gas of the gas turbine enters the waste heat boiler 1, and the waste heat boiler 1 is heated to generate two types of steam, namely high-pressure steam and low-pressure steam. The high-pressure steam enters the steam turbine 2 to push the steam turbine 2 to rotate to do work. The steam extracted by the steam turbine 2 and the low-pressure steam generated by the waste heat boiler 1 are used as a heating steam source of the heating network heater 5. The return water of the heat supply network is heated by the high back pressure condenser 4, then is pumped into the heat supply network heater 5 by the heat supply network circulating pump, and is sent out after being heated by the heat supply network heater 5.
When the steam turbine carries out double-rotor replacement, the steam turbine 2 is stopped during the replacement, the gas turbine and the waste heat boiler 1 are still in operation, namely all steam inlets of the steam turbine 2 are closed, the steam turbine 2 is cut off, high-pressure steam generated by the waste heat boiler 1 enters a steam supply system of a heat supply network heater 5 after being subjected to temperature reduction and pressure reduction through a steam turbine high-pressure bypass 3, and circulating water of the heat supply network is heated. In one embodiment, the rotor of the steam turbine 2 can be replaced only when the heating load reaches a certain level.
The specific scheme for replacing the rotor of the steam turbine 2 is as follows:
1. steam turbine 2 shutdown scheme
During rotor replacement, the steam turbine 2 is stopped, the gas turbine and the waste heat boiler 1 are still in operation, the high-pressure bypass 3 and the heat supply steam extraction stop gate are gradually opened, low-pressure steam generated by the waste heat boiler 1 is sent to the heat supply network heater 5, high-pressure steam generated by the waste heat boiler 1 is sent to the heat supply network heater 5 in the heat supply system after being subjected to temperature and pressure reduction through the high-pressure bypass 3, then the steam inlet high-pressure regulating gate of the steam turbine 2 is closed until the load of the steam turbine 2 is zero, the steam turbine 2 is switched on and stopped, and the generator 6 is disconnected. In the process, the circulating water system needs to be kept in normal operation. The heat supply network circulating water is led to the heat supply network heater 5 to be heated and then sent out.
2. Gas turbine and waste heat boiler operation mode
The load of the gas turbine is kept to operate constantly, low-pressure steam generated by the waste heat boiler 1 is sent to the heat supply network heater 5, and high-pressure steam generated by the waste heat boiler 1 is subjected to temperature reduction and pressure reduction and then is all supplied to the heat supply network heater 5 until the work of replacing a rotor of the steam turbine 2 is finished.
3. Commissioning of the steam turbine 2
After the rotor of the steam turbine 2 is replaced, the condenser 4 supplies circulating water to a heat supply network, the steam turbine 2 starts a program to rush, and the generators 6 are arranged in parallel and carry load. When the steam turbine 2 is in running, the high-pressure bypass 3 and the heat supply steam extraction stop valve are gradually closed according to the main steam pressure until the main steam pressure is completely closed.
In the starting process of the steam turbine 2, the low-pressure steam and part of the high-pressure steam of the waste heat boiler 1 are kept to supply heat all the time; and after the steam turbine 2 is started normally, the low-pressure steam is switched to a steam supplementing operation state. And adjusting the flow of circulating water entering a heat supply network of the condenser 4, always maintaining the exhaust back pressure of the steam turbine 2, and enabling the steam turbine 2 to enter a high-back-pressure circulating water heat supply operation mode.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (10)
1. The utility model provides a gas steam combined cycle high back pressure heat supply unit which characterized in that includes:
a waste heat boiler configured to generate high pressure steam and low pressure steam by gas turbine exhaust heating;
a steam turbine configured to perform work by high pressure steam rotation and perform high back pressure steam extraction for heating of heat supply network circulating water;
the steam turbine is provided with a high-pressure bypass, and the high-pressure bypass is used for reducing the temperature and the pressure of high-temperature steam and then sending the high-temperature steam into the heat supply network heater when the steam turbine is stopped;
the condenser is configured to heat the return water of the heat supply network by adopting the exhaust steam of the steam turbine and send the heated return water of the heat supply network to the heat supply network heater;
a heat supply network heater configured to heat supply network circulating water using low-pressure steam and turbine extraction steam as heating steam sources when a turbine is operating normally; and
when the steam turbine is stopped, the low-pressure steam and the high-pressure steam after temperature and pressure reduction are used as heating steam sources to heat the circulating water of the heat supply network.
2. The gas-steam combined cycle high back pressure heating unit according to claim 1, wherein when the steam turbine is deactivated, the return water of the heat supply network is directly delivered to the heat supply network heater for heating.
3. The gas-steam combined cycle high back pressure heating unit according to claim 1, wherein the condenser is provided with a circulating water system, and the circulating water system is used for cooling and condensing the turbine exhaust steam during the non-heating period of the unit.
4. The gas-steam combined cycle high back pressure heat supply unit of claim 1, wherein the heat supply network heater is further connected with a return water port of the waste heat boiler.
5. The gas-steam combined cycle high back pressure heat supply unit of claim 1, wherein the low pressure steam is further connected to a steam turbine inlet.
6. A method for a gas-steam combined cycle unit to exchange a rotor without stopping combustion engine comprises the gas-steam combined cycle high back pressure heat supply unit as claimed in any one of claims 1 to 5, wherein the method comprises the following steps:
gradually opening a high-pressure bypass of a steam turbine and a heat supply steam extraction stop valve, reducing the temperature and the pressure of high-pressure steam generated by a waste heat boiler through the high-pressure bypass, sending the high-pressure steam into a heat supply network heater, closing a steam inlet high-pressure regulating valve of the steam turbine until the load of the steam turbine reaches zero, opening a brake of the steam turbine, stopping the steam turbine, disconnecting a generator, and replacing a rotor of the stopped steam turbine;
after the operation of replacing the rotor of the steam turbine is finished, the condenser supplies circulating water to a heat supply network, the steam turbine is started to rotate, the generators are arranged in parallel, and the load is connected.
7. The method for replacing a turbine of a gas-steam combined cycle unit with a high back pressure heat supply rotor without stopping the combustion of the gas turbine as claimed in claim 6, wherein the load of the gas turbine is kept constant during the process of replacing the rotor of the steam turbine, the low pressure steam generated by the waste heat boiler is used for heating the circulating water of the heat supply network, and the high pressure steam generated by the waste heat boiler is used for heating the circulating water of the heat supply network after being subjected to temperature and pressure reduction.
8. The method for non-stop of the combustion engine of the high back pressure heat supply rotor of the gas-steam combined cycle unit as claimed in claim 6, wherein the high pressure bypass and the heat supply steam extraction stop door are gradually closed according to the main steam pressure until the turbine is completely closed when the turbine is in the run-on state.
9. The method for non-stop combustion of the high back pressure heat supply and conversion rotor of the gas-steam combined cycle unit as claimed in claim 6, wherein during the starting process of the steam turbine, the low pressure steam and part of the high pressure steam generated by the waste heat boiler are always used for heating the circulating water of the heat supply network.
10. The method for non-stop operation of the high back pressure heat supply and conversion rotor of the gas-steam combined cycle unit as claimed in claim 6, wherein after the turbine is started normally, the low pressure steam generated by the waste heat boiler is switched to the steam supplementing operation state for the turbine, and the flow rate of the circulating water entering the heat network of the condenser is adjusted to maintain the exhaust back pressure of the turbine, so that the turbine enters the high back pressure circulating water heat supply operation mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811203654.9A CN109322716B (en) | 2018-10-16 | 2018-10-16 | Gas-steam combined cycle high back pressure heat supply unit and rotor-changing non-stop combustion machine method |
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| CN201811203654.9A CN109322716B (en) | 2018-10-16 | 2018-10-16 | Gas-steam combined cycle high back pressure heat supply unit and rotor-changing non-stop combustion machine method |
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| CN109322716B true CN109322716B (en) | 2021-06-11 |
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| CN109882257A (en) * | 2019-04-10 | 2019-06-14 | 北京优瑞环保技术有限公司 | A kind of pumping of steam turbine one auxiliary bypass system |
| CN110953571A (en) * | 2019-10-16 | 2020-04-03 | 孙少强 | Heat supply steam residual pressure cascade utilization system applied to coal-fired heat supply unit |
| CN111219702B (en) * | 2020-01-16 | 2021-04-13 | 华电电力科学研究院有限公司 | System safety protection device for heat supply during shutdown of steam turbine and operation method thereof |
| CN111734505A (en) * | 2020-05-27 | 2020-10-02 | 北京龙威发电技术有限公司 | Supercritical high-back-pressure steam turbine heat supply system and heat supply method |
| CN112664918B (en) * | 2020-12-26 | 2021-09-21 | 龙游县金怡热电有限公司 | Gas and steam combined cycle central heating device and heating method |
| CN112556313A (en) * | 2020-12-28 | 2021-03-26 | 镇江市恒利低温技术有限公司 | Heat supply and air separation system utilizing high-temperature and high-pressure steam and application method thereof |
| CN114941552B (en) * | 2022-05-13 | 2023-05-23 | 华电电力科学研究院有限公司 | Large supercritical reheating type double-pumping back pressure unit-based rapid switching control method for heat supply without stopping furnace when shutdown |
| CN114963286B (en) * | 2022-06-21 | 2024-03-19 | 中冶焦耐(大连)工程技术有限公司 | Process for supplying heating water by using dry quenching waste heat power generation |
| CN115898574B (en) * | 2022-10-25 | 2024-06-11 | 东方电气集团东方汽轮机有限公司 | Multi-parameter heat supply steam cascade utilization system |
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| CN203374332U (en) * | 2013-07-26 | 2014-01-01 | 华能北京热电有限责任公司 | Gas-steam combined cycle unit with automatic starting-stopping control system |
| 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 |
| CN104534539A (en) * | 2015-01-08 | 2015-04-22 | 清华大学 | Gas steam combined cycle central heating device and heating method |
| CN204552839U (en) * | 2015-04-15 | 2015-08-12 | 河北钢铁股份有限公司邯郸分公司 | A kind of steam by-pass device of Combined cycle gas-steam turbine unit |
| CN206617195U (en) * | 2017-03-10 | 2017-11-07 | 华电淄博热电有限公司 | A kind of large-scale pair of back pressure birotor interchangeable Steam Turbine |
| CN107740933A (en) * | 2017-11-16 | 2018-02-27 | 大连派思燃气系统股份有限公司 | Storage device for gas turbine fuel gas |
| CN108087048B (en) * | 2017-12-05 | 2020-01-31 | 东方电气集团东方汽轮机有限公司 | Operation mode of cogeneration steam turbine generator unit |
| CN108964123A (en) * | 2018-07-17 | 2018-12-07 | 中山嘉明电力有限公司 | A kind of FCB operation method applied to fuel gas-steam unit power plant |
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