CN213419179U - Steam extraction and heat supply device for steam extraction steam turbine - Google Patents
Steam extraction and heat supply device for steam extraction steam turbine Download PDFInfo
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- CN213419179U CN213419179U CN202022705790.7U CN202022705790U CN213419179U CN 213419179 U CN213419179 U CN 213419179U CN 202022705790 U CN202022705790 U CN 202022705790U CN 213419179 U CN213419179 U CN 213419179U
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Abstract
The utility model discloses a steam extraction heating device for a steam extraction type steam turbine, which comprises a steam turbine intermediate pressure cylinder, wherein the steam turbine intermediate pressure cylinder is communicated with a heating steam main pipe, a first electric gate valve, a pneumatic check valve, an electric regulating valve, a second electric gate valve and a flowmeter are sequentially arranged on the heating steam main pipe, and the heating steam main pipe is also communicated with an original steam extraction pipeline; the first electric gate valve, the pneumatic check valve, the electric regulating valve, the second electric gate valve and the flowmeter are communicated with the DCS; the utility model has the advantages that: the efficiency of the unit is improved, the cold source loss of the power plant is reduced, the consumption of fuel is saved, and the environmental pollution is reduced.
Description
Technical Field
The utility model belongs to the field of heating device and relates to a heating device, specifically speaking are a heat supply device takes out steam for taking out steam turbine.
Background
The cogeneration is a production mode that a power plant not only produces electric energy, but also utilizes steam which is over-worked by a steam turbine generator to supply heat to users, namely, a process for simultaneously producing electricity and heat saves fuel compared with a mode for respectively producing electricity and heat. A thermal power plant operated in a cogeneration manner is called a thermal power plant. The steam source for supplying heat to the outside is the adjusting extraction of the extraction steam turbine or the exhaust of the back steam turbine. Cogeneration steam is commonly used in industrial production and for heating for civil use.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to design an extraction heating device for extraction steam turbine, improved the efficiency of unit, reduced the cold source loss of power plant, practiced thrift the consumption of fuel, reduced environmental pollution.
The technical scheme of the utility model is that:
the steam extraction heating device for the steam extraction type steam turbine comprises a steam turbine intermediate pressure cylinder, wherein the steam turbine intermediate pressure cylinder is communicated with a heating steam main pipe, a first electric gate valve, a pneumatic check valve, an electric regulating valve, a second electric gate valve and a flowmeter are sequentially arranged on the heating steam main pipe, and the heating steam main pipe is also communicated with an original steam extraction pipeline; first electric gate valve, pneumatic check valve, electrical control valve, second electric gate valve, flowmeter all with DCS system intercommunication.
And the original steam extraction pipeline is connected with the low-pressure heater pipeline.
And a drain pipeline is respectively arranged between the first electric gate valve and the pneumatic check valve and between the second electric gate valve and the flowmeter.
Wherein, the drain pipeline comprises an automatic steam trap and a drain valve which are connected in parallel.
The utility model discloses connect out steam pipeline all the way from the original three-section steam extraction pipeline of steam turbine, set up four valve series connections such as first electric gate valve, pneumatic check valve, electric control door, the electronic gate valve of second on the steam pipeline, establish automatic hydrophobic device around the valve, establish pressure transmitter, thermocouple on the pipeline. The two electric gate valves mainly play a role in isolating steam, the pneumatic check valve prevents steam of a main pipe from flowing back to a steam turbine when the unit breaks down and trips, so that the unit is overspeed, the electric adjusting valve is used for adjusting the valve opening according to the pressure requirement of a user side, the pressure transmitter and the thermocouple are mainly used for monitoring the pressure and the temperature of a steam supply pipeline, and the drain pipeline is used for discharging condensed water when the steam supply pipeline supplies steam and stops the steam, so that the pipeline is prevented from being impacted by water.
The utility model has the advantages that: the efficiency of the unit is improved, the cold source loss of the power plant is reduced, the consumption of fuel is saved, and the environmental pollution is reduced.
The present invention will be further explained with reference to the drawings and examples.
Drawings
Fig. 1 is a schematic structural view of an extraction heat supply device for an extraction steam turbine according to an embodiment of the present invention;
in the figure: 1. the system comprises a turbine intermediate pressure cylinder, 2, a first electric gate valve, 3, a pneumatic check valve, 4, an electric regulating valve, 5, a second electric gate valve, 6, a flowmeter, 7, a DCS system, 8, a DCS cable communication line, 9, an original steam extraction pipeline and 10, a drainage pipeline.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is not intended to limit the invention.
Example 1
As shown in fig. 1, an extraction heating device for an extraction steam turbine comprises a steam turbine intermediate pressure cylinder 1, wherein the steam turbine intermediate pressure cylinder 1 is communicated with a heating steam main pipe, the heating steam main pipe is sequentially provided with a first electric gate valve 2, a pneumatic check valve 3, an electric regulating valve 4, a second electric gate valve 5 and a flowmeter 6, and the heating steam main pipe is further communicated with an original extraction pipeline 9; the first electric gate valve 2, the pneumatic check valve 3, the electric regulating valve 4, the second electric gate valve 5 and the flowmeter 6 are communicated with the DCS system 7, signals of the field states of the devices are fed back to the DCS, and the DCS automatically controls the states of the field devices according to a set logic program.
The original steam extraction pipeline 9 is connected with a low-pressure heater pipeline.
And a drain pipeline 10 is respectively arranged between the first electric gate valve 2 and the pneumatic check valve 3 and between the second electric gate valve 5 and the flowmeter 6.
Wherein the drain line 10 includes an automatic steam trap and a drain valve in parallel.
The steam turbine intermediate pressure cylinder 1 is used for performing work by steam expansion; the first electric gate valve 2 and the second electric gate valve 5 play a role in isolation; the pneumatic check valve 3 prevents steam from flowing backwards; the electric adjusting door 4 plays an adjusting role; the flowmeter 6 measures the steam supply flow; the DCS system 7 collects signals; the DCS cable communication line 8 plays a role in signal transmission; the drain line 10 performs a draining function.
The utility model discloses can satisfy user 40 t/h's vapour demand to can adjust according to the actual vapour demand of using of user, when the unit breaks down, pneumatic check valve closes fast, thereby prevents that heat supply main pipe steam from flowing backwards to the steam turbine, reaches the purpose that prevents the steam turbine and overspeed.
The external drainage of the cogeneration centralized heating project is the production wastewater of domestic and various heat exchange stations, and the sewage quality of the external drainage is the same as the normal domestic water. The combined heat and power generation centralized heat supply is far less than that of a dispersed boiler room in the aspect of waste water discharge. The treatment and recovery of the industrial wastewater are far higher than those of the decentralized boiler room, so that the pollution of the industrial wastewater discharged by the boiler room to the water bodies in the five-family canal city is reduced.
After the cogeneration is operated, the existing small and medium boilers are completely removed, so that the noise pollution of the boilers and auxiliary equipment is thoroughly eliminated. Only the noise pollution of the circulating water pump of the heat exchange station is left. The noise values of the heat exchange stations in the daytime and at night in the factory boundary are within the standard range of class II of Industrial Enterprise factory boundary noise standards, and the noise of the heat exchange stations in the district has little influence on the surrounding environment. After the central heating of cogeneration is realized, the closed scattered boiler house land can be considered as other purposes, such as public greenbelts, houses, public buildings and the like, thereby greatly improving the living environment of people.
Claims (4)
1. A steam extraction heating device for extracting steam turbine, its characterized in that: the steam turbine intermediate pressure cylinder is communicated with a heating steam main pipe, a first electric gate valve, a pneumatic check valve, an electric regulating valve, a second electric gate valve and a flowmeter are sequentially arranged on the heating steam main pipe, and the heating steam main pipe is also communicated with an original steam extraction pipeline; first electric gate valve, pneumatic check valve, electrical control valve, second electric gate valve, flowmeter all with DCS system intercommunication.
2. The extraction heating system for an extraction steam turbine as set forth in claim 1, wherein: and the original steam extraction pipeline is connected with the low-pressure heater pipeline.
3. The extraction heating system for an extraction steam turbine as set forth in claim 1, wherein: and a drain pipeline is respectively arranged between the first electric gate valve and the pneumatic check valve and between the second electric gate valve and the flowmeter.
4. An extraction heating apparatus for an extraction steam turbine according to claim 3, characterized in that: the drain pipeline comprises an automatic steam trap and a drain valve which are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022705790.7U CN213419179U (en) | 2020-11-20 | 2020-11-20 | Steam extraction and heat supply device for steam extraction steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022705790.7U CN213419179U (en) | 2020-11-20 | 2020-11-20 | Steam extraction and heat supply device for steam extraction steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213419179U true CN213419179U (en) | 2021-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022705790.7U Active CN213419179U (en) | 2020-11-20 | 2020-11-20 | Steam extraction and heat supply device for steam extraction steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213419179U (en) |
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2020
- 2020-11-20 CN CN202022705790.7U patent/CN213419179U/en active Active
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