CN215444170U - Cold-section steam multistage utilization system for enhancing industrial steam supply capacity of once-through boiler - Google Patents
Cold-section steam multistage utilization system for enhancing industrial steam supply capacity of once-through boiler Download PDFInfo
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- CN215444170U CN215444170U CN202122084250.6U CN202122084250U CN215444170U CN 215444170 U CN215444170 U CN 215444170U CN 202122084250 U CN202122084250 U CN 202122084250U CN 215444170 U CN215444170 U CN 215444170U
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Abstract
The utility model relates to a cold-section steam multi-stage utilization system for enhancing industrial steam supply capacity of a once-through boiler. At present, more once-through boilers use cold re-steam as a steam source, but if more cold re-steam is extracted, the danger of overtemperature of a boiler reheater easily occurs. A cold-stage steam multi-stage utilization system for enhancing industrial steam supply capacity of a once-through boiler comprises the following components: the high-pressure steam turbine cylinder is connected with the high-pressure heater through a high-pressure steam extraction pipeline (4), the high-pressure steam turbine cylinder is connected with the stepped heat exchanger through a steam pipeline (5), a flow regulating pore plate (6) is installed on the steam pipeline, the stepped heat exchanger is connected with the flow regulating pore plate in parallel, and water fed from the outlet of the high-pressure heater enters the stepped heat exchanger after passing through a bypass isolation valve (7). The utility model is applied to the field of energy cascade utilization.
Description
Technical Field
The utility model relates to a cold-section steam multi-stage utilization system for enhancing industrial steam supply capacity of a once-through boiler.
Background
The existing once-through boiler utilizes a cold section to supply industrial steam, and the external industrial steam supply can effectively reduce the energy consumption index of a thermal power generator set and is also one of important profit directions of the generator set. Meanwhile, on the basis of meeting the requirements of industrial steam supply users on steam parameters, steam with lower quality is used as much as possible, so that economic operation of a unit is facilitated. Therefore, the direction of improving the industrial steam supply economy of the unit is to increase the industrial steam supply and reduce the steam supply parameters as much as possible.
At present, more once-through boilers use cold reheat steam as a steam source, but because cold reheat steam is more if extracted, the danger of overtemperature appears easily in boiler reheaters, so the extraction amount of cold reheat steam of many once-through boilers is greatly restricted, the requirements of users can not be completely met, low-temperature reheater outlet steam with higher steam quality or even reheat steam can only be utilized, meanwhile, the temperature of cold reheat steam is generally higher than the requirements of users by dozens of degrees centigrade, and the temperature is reduced by spraying desuperheating water.
Disclosure of Invention
The utility model aims to provide a cold-section steam multistage utilization system for enhancing industrial steam supply capacity of a once-through boiler, wherein heat of cold re-steam is partially utilized into water supply through heat exchange, so that the temperature of the cold re-steam and external industrial steam supply is reduced, the risk of overheat of a reheater during cold re-external steam supply of the boiler is reduced, and the maximum capacity of cold re-external industrial steam supply is improved.
The above purpose is realized by the following technical scheme:
a cold-stage steam multi-stage utilization system for enhancing industrial steam supply capacity of a once-through boiler comprises the following components: steam turbine high pressure jar through high pressure with the steam extraction pipeline with high pressure feed water heater connect, steam turbine high pressure jar pass through steam conduit with stepped heat exchanger connect, steam conduit on install the flow control orifice plate, stepped heat exchanger on connect in parallel on the flow control orifice plate, the feedwater of high pressure feed water heater export get into behind the bypass isolating valve stepped heat exchanger, stepped heat exchanger on still connect in parallel has the bypass pipeline, and install the bypass isolating valve on the bypass pipeline.
The cold section steam multistage utilization system for enhancing the industrial steam supply capacity of the once-through boiler is characterized in that the high-pressure heater is connected with a boiler water supply pipeline, and the stepped heat exchanger is respectively connected with the water supply pipeline and an original pipeline of a boiler reheater.
The utility model has the beneficial effects that:
1. the utility model reasonably reduces the temperature of the cold re-steam, transfers the redundant heat to other positions of the generator set for full utilization, cools partial cold re-steam by taking boiler feed water as a cooling source, reduces the temperature of the cold re-steam of the generator set, reduces the risk of overtemperature of a boiler reheater, and can greatly increase the steam supply amount of the cold re-steam of the generator set. The feed water temperature and the cold recycling industrial steam supply capacity are improved.
2. When the steam-cooled steam generator normally operates, the cold steam is subjected to heat exchange with feed water and temperature reduction through the stepped regenerative heater, and the cooled cold re-steam is converged with the other part of cold re-steam passing through the flow regulating orifice plate; the feed water enters the boiler after passing through the high-pressure heater of the original system, and the temperature of the feed water is effectively increased through step heating and high-pressure heating.
3. According to the utility model, part of heat of cold re-steam is transferred into boiler feed water through the heat recovery heat exchanger, on one hand, the temperature of the cold re-steam can be reduced by more than 20 ℃, the cold re-industrial steam supply can be increased by more than 100%, on the other hand, the boiler feed water temperature can be increased, the energy of cold re-extracted steam can be fully utilized, in addition, the cold re-energy utilization process can not obviously influence the circulation efficiency of the unit, the economy of the unit can be improved due to the improvement of external steam supply capacity and the reduction of the use of high-quality steam, in addition, the use of industrial steam supply and temperature reduction water can also be reduced, the operation economy of the unit is improved, and the coal consumption of power generation is reduced.
4. The utility model is provided with the stage heat exchanger, and partial cold re-steam is used for heating boiler feed water so as to achieve energy combined transfer utilization, thereby reducing the risk of overtemperature of a boiler reheater, increasing the maximum heat supply capacity of cold re-steam, increasing the feed water temperature, reducing the consumption of cold re-steam supply desuperheating water and improving the running economy of a unit.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the system comprises a steam turbine high-pressure cylinder, 2, a high-pressure heater, 3, a stepped heat exchanger, 4, a high-pressure steam extraction pipeline, 5, a steam pipeline, 6, a flow regulating orifice plate, 7, a bypass isolation valve, 8, a boiler water supply pipeline, 9, a water supply pipeline, 10 and an original pipeline of a boiler reheater.
The specific implementation mode is as follows:
example 1:
a cold-stage steam multi-stage utilization system for enhancing industrial steam supply capacity of a once-through boiler comprises the following components: steam turbine high pressure jar 1, high pressure feed water heater 2 and ladder heat exchanger 3, steam turbine high pressure jar through high pressure with the extraction steam pipe way 4 with high pressure feed water heater connect, steam turbine high pressure jar pass through steam conduit 5 with ladder heat exchanger connect, steam conduit on install flow control orifice plate 6, ladder heat exchanger on connect in parallel on the flow control orifice plate, the feedwater of high pressure feed water heater export enter behind bypass isolating valve 7 ladder heat exchanger, ladder heat exchanger on still connect in parallel has the bypass pipeline, and install the bypass isolating valve on the bypass pipeline.
Example 2:
according to the cold-stage steam multi-stage utilization system for enhancing the industrial steam supply capacity of the once-through boiler in the embodiment 1, the high-pressure heater is connected with a boiler water supply pipeline 8, and the stepped heat exchanger is respectively connected with a water supply pipeline 9 and an original pipeline 10 of a boiler reheater.
(1) The utility model has a stepped heat exchanger, a flow regulating orifice plate, a bypass isolating valve and the like, cold vapor enters the stepped heat exchanger through a steam pipeline, the cold vapor is mixed with original steam through a steam return pipeline after heat exchange and temperature reduction, a bypass is newly arranged on the cold vapor pipeline, the flow regulating orifice plate is used for balancing the steam flow, and feed water at the outlet of a high-pressure heater enters the stepped heat exchanger after passing through a water inlet isolating valve.
(2) Cold re-steam of the high-pressure cylinder enters a steam pipeline; the steam return pipeline is provided with a stepped heat exchanger, part of heat of the cold re-steam exchanges heat with feed water through the stepped heat exchanger, and the heat exchanged feed water is output as boiler feed water.
(3) The steam pipeline is provided with a flow regulating pore plate, the heat recovery heat exchanger is connected on the flow regulating pore plate in parallel, one part of cold re-steam after the heat recovery heat exchanger is converged is output as industrial steam supply, and the other part of cold re-steam is output to the boiler reheater.
Claims (2)
1. A cold-stage steam multi-stage utilization system for enhancing industrial steam supply capacity of a once-through boiler comprises the following components: steam turbine high pressure cylinder, high pressure feed water heater and ladder heat exchanger, characterized by: the high-pressure steam turbine cylinder pass through high pressure and draw the steam pipe way with high pressure feed water heater connect, the high-pressure steam turbine cylinder pass through the steam conduit with stepped heat exchanger connect, the steam conduit on install the flow control orifice plate, stepped heat exchanger on connect in parallel on the flow control orifice plate, the feedwater of high pressure feed water heater export get into behind the bypass isolating valve stepped heat exchanger, stepped heat exchanger on still connect in parallel has the bypass pipeline, and install the bypass isolating valve on the bypass pipeline.
2. The cold-stage steam multi-stage utilization system for enhancing the industrial steam supply capacity of the once-through boiler, as claimed in claim 1, is characterized in that: the high-pressure heater is connected with a boiler water supply pipeline, and the stepped heat exchanger is respectively connected with the water supply pipeline and an original pipeline of the boiler reheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122084250.6U CN215444170U (en) | 2021-09-01 | 2021-09-01 | Cold-section steam multistage utilization system for enhancing industrial steam supply capacity of once-through boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122084250.6U CN215444170U (en) | 2021-09-01 | 2021-09-01 | Cold-section steam multistage utilization system for enhancing industrial steam supply capacity of once-through boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215444170U true CN215444170U (en) | 2022-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122084250.6U Expired - Fee Related CN215444170U (en) | 2021-09-01 | 2021-09-01 | Cold-section steam multistage utilization system for enhancing industrial steam supply capacity of once-through boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215444170U (en) |
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2021
- 2021-09-01 CN CN202122084250.6U patent/CN215444170U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220107 |