CN208982126U - Combined cycle combined cooling heating and power unit steam supply superheat utilization system - Google Patents
Combined cycle combined cooling heating and power unit steam supply superheat utilization system Download PDFInfo
- Publication number
- CN208982126U CN208982126U CN201821771961.2U CN201821771961U CN208982126U CN 208982126 U CN208982126 U CN 208982126U CN 201821771961 U CN201821771961 U CN 201821771961U CN 208982126 U CN208982126 U CN 208982126U
- Authority
- CN
- China
- Prior art keywords
- steam
- water
- outlet
- heat exchanger
- power unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 25
- 238000001816 cooling Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 103
- 239000002918 waste heat Substances 0.000 claims abstract description 27
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000010977 unit operation Methods 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 9
- 238000000605 extraction Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000003303 reheating Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The utility model discloses a combined cycle combined cooling heating and power unit steam supply superheat degree utilization system, which comprises a waste heat boiler, a steam turbine, a water supply pump and a steam-water heat exchanger; the steam-water heat exchanger is provided with a steam side inlet and a water side inlet, the steam side inlet is connected to a steam supply port of a steam turbine, the steam side outlet is connected to a heat consumer, the water side inlet is connected to a water supply pump outlet, the water side outlet is connected to an outlet of any one energy level high-pressure economizer in the waste heat boiler, and outlet hot water of the high-pressure economizer and outlet hot water of the steam-water heat exchanger are mixed and then enter a next-stage high-pressure economizer or a steam drum; the inlet of the feed water pump is connected to the outlet of the low-pressure steam drum water side in the waste heat boiler, the outlet of the feed water pump is divided into two paths, one path is connected to the inlet of the lowest-energy-level high-pressure economizer of the waste heat boiler, and the other path is connected to the inlet of the water side of the steam-water heat exchanger. The utility model discloses have the benefit that improves combined cycle combined cooling heating and power unit operation economic nature.
Description
Technical Field
The utility model belongs to the technical field of the energy utilization, concretely relates to combined cycle combined cooling heating and power unit supplies vapour superheat degree and utilizes system.
Background
The combined cycle combined cooling heating and power system is an important way for efficient utilization of natural gas at present and for a long time in the future in China, and becomes one of key development directions of thirteen-five planning of energy development in China.
In combined cycle combined cooling, heating and power systems, steam is usually extracted from a steam turbine and supplied to heating, industrial or refrigeration consumers via a steam line. The extracted steam superheat degree of a steam turbine of the combined cycle combined cooling heating and power system is generally higher, particularly for a reheating steam turbine, the extracted steam superheat degree of a medium pressure cylinder generally exceeds 200 ℃, the requirement of a heat user on the steam superheat degree is not high, and saturated steam or superheated steam with a small superheat degree can meet the requirement. In order to achieve steam parameters of a heat user, a temperature reduction pressure reducer is usually arranged in a combined cooling heating and power system, a water spraying temperature reduction mode is adopted, high-superheat-degree steam at the side of a steam turbine is reduced to the steam temperature required by the user, the steam energy level is reduced in the water spraying temperature reduction process, and a large amount of high-grade steam energy is lost due to the unreasonable utilization mode. According to the measurement of a single set of F-stage combined cycle unit: under the conditions that the steam extraction pressure of a steam turbine intermediate pressure cylinder is 1.8MPa, the steam extraction temperature is 457 ℃, and the steam supply amount is 250t/h, the high-grade energy loss of steam caused by the fact that the temperature is reduced to saturated steam by water spraying exceeds 35 MW.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a combined cycle combined cooling heating and power unit steam supply superheat degree utilization system. The system utilizes the energy of the steam supply superheat degree to heat the feed water of the waste heat boiler, and the heated feed water is merged into the waste heat boiler economizer with appropriate pressure grade and temperature, thereby achieving the energy-saving effect of utilizing the steam extraction superheat degree and improving the running economy of the unit.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a combined cycle combined cooling heating and power unit steam supply superheat degree utilization system comprises a waste heat boiler, a steam turbine, a water supply pump and a steam-water heat exchanger; wherein,
the steam-water heat exchanger is provided with a steam side inlet and a water side inlet, the steam side inlet is connected to a steam supply port of the steam turbine, the steam side outlet is connected to a heat consumer, the water side inlet is connected to a water supply pump outlet, the water side outlet is connected to an outlet of any energy level high-pressure economizer in the waste heat boiler, and outlet hot water of the high-pressure economizer and outlet hot water of the steam-water heat exchanger are mixed and then enter a next-stage high-pressure economizer or a steam pocket;
the inlet of the feed water pump is connected to the water side outlet of the low-pressure steam pocket of the waste heat boiler, the outlet of the feed water pump is divided into two paths, one path is connected to the inlet of the lowest-energy-level high-pressure economizer of the waste heat boiler, and the other path is connected to the water side inlet of the steam-water heat exchanger.
The utility model discloses a further improvement lies in, is provided with first temperature measuring device on the pipeline between steam-side outlet and the heat consumer of steam-water heat exchanger.
The utility model discloses a further improvement lies in, is provided with second temperature measuring device on the pipeline between steam-water heat exchanger's the water side export and the exhaust-heat boiler.
The utility model discloses further improvement lies in that, the water-feeding pump exit linkage is provided with first valve to the pipeline of exhaust-heat boiler minimum energy level high pressure economizer entry.
The utility model discloses a further improvement lies in, is provided with the second valve on the pipeline that the feed pump exit linkage is to steam-water heat exchanger's water side entry.
The utility model discloses a further improvement lies in, is provided with the third valve on the pipeline that steam side entry linkage to steam turbine steam feed mouth of steam-water heat exchanger.
The utility model discloses a further improvement lies in, sets up the bypass pipeline between steam-water heat exchanger's the water side entry and the water side export, is provided with the fourth valve on this bypass pipeline.
The utility model discloses a further improvement lies in, is provided with the fifth valve on steam-side outlet connection to the pipeline of heat consumer of steam-water heat exchanger.
The utility model discloses further improvement lies in, exhaust-heat boiler adopts vertical or horizontal exhaust-heat boiler, and this exhaust-heat boiler is non-reheat or reheat formula.
The utility model discloses a further improvement lies in, and the steam turbine is reheat or non-reheat steam turbine.
The utility model discloses following beneficial effect has:
the utility model discloses the superheat degree of recoverable heat supply steam avoids the high-grade energy loss of heat supply steam because of the water spray temperature reduction brings, and the energy of recovery returns exhaust-heat boiler system, can improve exhaust-heat boiler steam output, finally reaches the beneficial effect who improves the whole economic nature of cooling, heating and power cogeneration system. Through calculating, under the same steam supply volume and steam supply parameter, single set F cascade closes cold and hot combined supply unit of circulation and adopts the utility model discloses afterwards, the power generation heat rate decline can reach dozens kJ/kWh (specific benefit depends on steam supply volume, steam supply parameter and system architecture and decides), and energy-conserving benefit is showing.
The utility model discloses use heat supply steam as the heat source, under the prerequisite that does not influence user side steam consumption parameter, utilize the super heat energy heating of heat supply steam and improve water-feeding pump export hot water temperature to energy temperature is to mouthful, step utilization as the principle, makes the hot water get into the suitable region of exhaust-heat boiler, the utility model discloses have the benefit that improves combined cycle cooling heating and power cogeneration unit operation economy.
Drawings
Fig. 1 is a schematic diagram of the structure principle of a steam supply superheat utilization system of a combined cycle combined cooling heating and power unit.
In the figure: 1 is a waste heat boiler, 2 is a steam turbine, 3 is a feed pump, 4 is a steam-water heat exchanger, 5 is a heat consumer, 6 is a first temperature measuring device, 7 is a second temperature measuring device, 101 is a first valve, 102 is a second valve, 103 is a third valve, 104 is a fourth valve, and 105 is a fifth valve.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings:
as shown in fig. 1, the utility model provides a pair of combined cycle combined cooling heating and power unit supplies vapour superheat degree utilization system, including setting up steam-water heat exchanger 4, exhaust-heat boiler 1, feed pump 3, steam turbine 2, pipeline, first valve 101 ~ fifth valve 105, first temperature measuring device 6 and second temperature measuring device 7 in the power plant.
The steam-water heat exchanger 4 in the system is provided with a steam side inlet and a water side inlet and outlet: the steam side inlet is connected to a steam supply port of the steam turbine 2 through a pipeline and a third valve 103, the steam side outlet is connected to a heat consumer through a pipeline and a fifth valve 105, and steam supplied by the steam turbine is supplied to the heat consumer after heat exchange and cooling through the steam-water heat exchanger 4; the water side inlet of the steam-water heat exchanger 4 is connected to the outlet of the water feeding pump 3 through a pipeline and a second valve 102, the water side outlet is connected to the outlet of any energy level high-pressure economizer of the waste heat boiler through a pipeline and a fifth valve 105, and the water fed from the outlet of the water feeding pump 3 absorbs heat and is heated through the steam-water heat exchanger 4, and then is mixed with the hot water at the outlet of any one level high-pressure economizer of the waste heat boiler and enters the next level high-pressure economizer or a steam pocket.
An inlet of the feed pump 3 is connected to an outlet of the low-pressure steam drum water side of the waste heat boiler 1; the outlet of the feed pump 3 is divided into two paths: one path is connected to the inlet of the lowest energy level high-pressure economizer of the waste heat boiler 1 through a pipeline and a first valve 101, and the other path is connected to the inlet of the water side of the steam-water heat exchanger 4 through a pipeline and a second valve 102.
The distribution of two paths of water supply flow of the water supply pump 3 is controlled by changing the opening degrees of the first valve 101 and the second valve 102, and the method for distributing the water supply flow is to fully utilize the superheat energy of steam supply on the premise of ensuring that the steam supply temperature meets the requirements of a user side and ensure that the water side outlet temperature of the steam-water heat exchanger 4 is lower than the saturation temperature and is not vaporized.
The measurement of the steam supply temperature at the user side is realized by a first temperature measuring device 6 arranged between the steam side outlet of the steam-water heat exchanger 4 and the heat user 5; the water-side outlet temperature of the steam-water heat exchanger 4 is measured by a second temperature measuring device 7 which is arranged between the water-side outlet of the steam-water heat exchanger 4 and the waste heat boiler 1.
A bypass pipeline is arranged between the water side inlet and the water side outlet of the steam-water heat exchanger 4, and a fourth valve 104 is arranged, so that the operation and the transportation of the steam-water heat exchanger 4 are realized through the opening and closing of the fourth valve 104.
In addition, the waste heat boiler can be vertical or horizontal; non-reheat or reheat; the pressure grade is single pressure, double pressure, triple pressure and above;
and dividing the energy levels of the high-pressure coal economizer according to the sequence that the flue gas in the waste heat boiler flows through the high-pressure coal economizer, wherein the flue gas firstly flows through the highest-energy-level high-pressure coal economizer, and the flue gas finally flows through the lowest-energy-level high-pressure coal economizer.
The steam turbine type can be reheating type or non-reheating type; steam extraction condensing type, steam extraction back pressure type or pure back pressure type.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent one embodiment of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A combined cycle combined cooling heating and power unit steam supply superheat degree utilization system is characterized by comprising a waste heat boiler (1), a steam turbine (2), a water feed pump (3) and a steam-water heat exchanger (4); wherein,
the steam-water heat exchanger (4) is provided with a steam side inlet and a water side inlet, the steam side inlet is connected to a steam supply port of the steam turbine (2), the steam side outlet is connected to a heat consumer (5), the water side inlet is connected to an outlet of the water supply pump (3), the water side outlet is connected to an outlet of any one stage of high-pressure economizer in the waste heat boiler (1), and outlet hot water of the stage of high-pressure economizer and outlet hot water of the steam-water heat exchanger (4) are mixed and then enter a next stage of high-pressure economizer or a steam pocket;
an inlet of the water feeding pump (3) is connected to a water side outlet of a low-pressure steam pocket in the waste heat boiler (1), an outlet of the water feeding pump (3) is divided into two paths, one path is connected to an inlet of a lowest-energy-level high-pressure economizer of the waste heat boiler (1), and the other path is connected to a water side inlet of the steam-water heat exchanger (4).
2. A combined cycle combined heat and power unit steam supply superheat degree utilization system according to claim 1, characterized in that a first temperature measuring device (6) is provided on the conduit between the steam side outlet of the steam-water heat exchanger (4) and the heat consumer (5).
3. The steam supply superheat utilization system of the combined cycle combined cooling, heating and power unit according to claim 2, characterized in that a second temperature measuring device (7) is arranged on a pipeline between a water side outlet of the steam-water heat exchanger (4) and the waste heat boiler (1).
4. The steam supply superheat utilization system of the combined cycle combined cooling heating and power unit as claimed in claim 1, characterized in that a first valve (101) is arranged on a pipeline connecting an outlet of the feed water pump (3) to an inlet of a lowest-energy-level high-pressure economizer of the waste heat boiler (1).
5. The steam supply superheat utilization system of the combined cycle combined cooling heating and power unit as claimed in claim 4, characterized in that a second valve (102) is arranged on a pipeline connecting an outlet of the water supply pump (3) to a water side inlet of the steam-water heat exchanger (4).
6. A combined cycle combined cooling heating and power unit steam supply superheat degree utilization system according to claim 5, characterized in that a third valve (103) is provided on a pipe connecting a steam side inlet of the steam-water heat exchanger (4) to a steam supply port of the steam turbine (2).
7. The steam supply superheat utilization system of the combined cycle combined cooling, heating and power unit according to claim 6, characterized in that a bypass pipe is arranged between the water side inlet and the water side outlet of the steam-water heat exchanger (4), and a fourth valve (104) is arranged on the bypass pipe.
8. A combined cycle combined heat and power unit steam supply superheat degree utilization system according to claim 7, characterized in that a fifth valve (105) is provided on the pipe connecting the steam side outlet of the steam-water heat exchanger (4) to the heat consumer (5).
9. The steam supply superheat utilization system of the combined cycle combined cooling heating and power unit according to claim 1, wherein the waste heat boiler (1) is a vertical or horizontal waste heat boiler, and the waste heat boiler (1) is a non-reheat or reheat type.
10. The steam supply superheat utilization system of a combined cycle combined cooling heating and power unit according to claim 1, wherein the steam turbine (2) is a reheat or non-reheat steam turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821771961.2U CN208982126U (en) | 2018-10-30 | 2018-10-30 | Combined cycle combined cooling heating and power unit steam supply superheat utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821771961.2U CN208982126U (en) | 2018-10-30 | 2018-10-30 | Combined cycle combined cooling heating and power unit steam supply superheat utilization system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208982126U true CN208982126U (en) | 2019-06-14 |
Family
ID=66789623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821771961.2U Active CN208982126U (en) | 2018-10-30 | 2018-10-30 | Combined cycle combined cooling heating and power unit steam supply superheat utilization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208982126U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296415A (en) * | 2018-10-30 | 2019-02-01 | 华能国际电力股份有限公司 | Combined cycle combined cooling heating and power unit steam supply superheat utilization system |
-
2018
- 2018-10-30 CN CN201821771961.2U patent/CN208982126U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296415A (en) * | 2018-10-30 | 2019-02-01 | 华能国际电力股份有限公司 | Combined cycle combined cooling heating and power unit steam supply superheat utilization system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104314628B (en) | A kind of coal unit and gas turbine combined power generation system | |
| CN107605553A (en) | Energy conserving system and its intelligent control method for steam power plant's multi-heat source industrial heating | |
| CN107940538A (en) | A kind of classification hold over system and its peak regulating method for cogeneration units | |
| CN112856363B (en) | System and method for improving heat supply steam parameters of deep peak shaving heat supply unit | |
| CN208519750U (en) | A kind of thermal power plant's fused salt accumulation of heat peak regulation system heated using main steam | |
| CN106949445B (en) | Fused salt heat storage type peak regulation system and method for coal-fired power generating unit | |
| CN204225940U (en) | A kind of coal unit and gas turbine combined power generation system | |
| CN201916008U (en) | Expansion power energy-saving system with high flow, low parameter and high back pressure | |
| CN205351277U (en) | A back pressure steam turbine thermodynamic system for isolated network operation | |
| CN105570861B (en) | A kind of cascaded utilization of energy apparatus and method for extraction for heat supply system | |
| CN202693508U (en) | System for testing efficiency of pipeline of thermal power generating unit | |
| CN208982126U (en) | Combined cycle combined cooling heating and power unit steam supply superheat utilization system | |
| CN210483828U (en) | Energy-saving power generation and utilization system utilizing exhaust steam waste heat of steam turbine of thermal power plant | |
| CN211174242U (en) | Heating season cogeneration unit on-line electricity load adjusting system | |
| CN206018578U (en) | A add medicine and sampling system for combined cycle generating set multi-pressure exhaust-heat boiler | |
| CN209470194U (en) | A kind of coal gas electricity generation boiler water supply system | |
| CN209761562U (en) | Combined cycle power generation system | |
| CN109296415B (en) | Combined cycle combined cooling heating power unit steam supply superheat degree utilization system | |
| CN208418666U (en) | A kind of thermal power plant's fused salt storage heating system heated using main steam | |
| CN110700909A (en) | Heating season cogeneration unit on-line electricity load adjusting system and adjusting method | |
| CN215489985U (en) | High-parameter heating system based on energy level matching | |
| CN205717156U (en) | A kind of high-pressure heater train with built-in steam condenser | |
| CN215062379U (en) | High back pressure heating system utilizing electric boiler peak shaving | |
| CN205957140U (en) | Heating system that heat utilization efficiency is high | |
| CN211316126U (en) | Reheating steam combined middle-discharge steam heating water supply and heat supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |