CN218266043U - Steam-electricity coupling energy-saving water supply system - Google Patents
Steam-electricity coupling energy-saving water supply system Download PDFInfo
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- CN218266043U CN218266043U CN202121877602.7U CN202121877602U CN218266043U CN 218266043 U CN218266043 U CN 218266043U CN 202121877602 U CN202121877602 U CN 202121877602U CN 218266043 U CN218266043 U CN 218266043U
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Abstract
The utility model discloses an energy-conserving water supply system of vapour electric coupling, including changing water station, moisturizing heater, oxygen-eliminating device, steam boiler, a plurality of isolation valve, water pipe, steam conduit, its characterized in that still includes vapour electric coupling water supply installation and control system, vapour electric coupling water supply installation passes through connecting axle coaxial coupling by feed pump, motor, steam turbine and constitutes. The utility model discloses a steam turbine and motor coupling linkage replace the motor to drag the feed pump, can effectively reduce the loss of feed pump effective power and reduce the power consumption of thermal power plant, simultaneously under the condition of station service outage, can drag the feed pump through the steam turbine and guarantee that the boiler is watered.
Description
Technical Field
The utility model relates to a steam power plant boiler energy-saving water supply system technical field especially relates to a vapour electric coupling energy-saving water supply system.
Background
At present, a steam boiler is mostly supplied with water by dragging a feed pump by a motor in a thermal power plant. Because the motor is rated revolution, can often appear the problem that feed water flow load and boiler water consumption can not fine match, simultaneously under the condition of house service outage, electronic feed water pump can not satisfy boiler feed water demand.
The existing solution generally adopts the adjustment of a recirculation door of a water feeding pump in operation to ensure the stability of water feeding pressure and flow, but the method can cause the loss of the effective power of the water feeding pump (generally 15% -20% of the effective power of a single device), and the leakage is easy to occur inside a valve of the water feeding recirculation door through frequent passive adjustment, so that the loss of the effective power of the water feeding pump is aggravated, and meanwhile, the water feeding of a boiler can be ensured by dragging the water feeding pump through a steam turbine under the condition of power outage of a plant.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an energy-conserving water supply system of vapour electricity coupling adopts steam turbine and motor coupling linkage to replace the motor to drag the feed pump, can effectively reduce the loss of feed pump effective power and reduce the power consumption rate of thermal power plant, guarantees the boiler and gives water stably in the condition of station service power outage.
In order to achieve the above purpose, the specific technical solution of the present invention is as follows:
the utility model provides a vapour electric coupling energy-conserving water supply system, includes water station, moisturizing heater, oxygen-eliminating device, steam boiler, a plurality of isolation valve, water pipe, steam conduit, its characterized in that still includes vapour electric coupling water feeding unit and control system, vapour electric coupling water feeding unit passes through the connecting axle coaxial coupling by feed pump, motor, steam turbine and constitutes.
Preferably, the water melting station is connected with the water supplementing heater in an isolating mode through a cold demineralized water main pipe, and the water supplementing heater is connected with the deaerator in an isolating mode through a hot demineralized water main pipe.
Preferably, the deaerator is connected with the water feed pump in an isolating mode through a heat desalting and deaerating water main pipe, the water feed pump is connected with the steam boiler through a water feed pipe, an isolation valve and a water flow monitoring device are installed on the water feed pipe, and the water flow monitoring device is connected with the DCS system.
Preferably, the steam boiler is connected with the water replenishing heater through a first steam pipeline, an isolation valve is arranged on the first steam pipeline, the steam boiler provides steam, the steam boiler is connected with the steam turbine through a second steam pipeline, and the isolation valve is arranged on the second steam pipeline.
Preferably, the motor is controlled by a frequency converter, the steam turbine is connected with a single PLC control cabinet, the single PLC control cabinet is connected with a DCS system, and the PLC control cabinet is connected with a UPS power supply.
Preferably, the isolation valve is an electric isolation valve, and the isolation valve is connected with the UPS power supply.
The utility model has the advantages of it is following:
the system adopts the coupling linkage of the steam turbine and the motor to replace the motor to drag the water feeding pump, so that the loss of the effective power of the water feeding pump can be effectively reduced, and the power consumption of a thermal power plant is reduced.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, the following description will be made in detail with reference to the accompanying drawings.
As shown in fig. 1, the utility model provides an energy-conserving water supply system of vapour electric coupling, including changing water station 1, moisturizing heater 2, oxygen-eliminating device 3, steam boiler 4, vapour electric coupling water supply installation and control system to and a plurality of isolation valve, water pipe, steam conduit.
The chemical water station 1 is connected with the moisturizing heater 2 through the female pipe 20 of cold demineralized water, installs the isolating valve 25 on the female pipe 20 of cold demineralized water, and cold water is through carrying out the desalination through chemical water station 1 earlier and handling, becomes cold demineralized water, gets into moisturizing heater 2 through the female pipe 20 of cold demineralized water and heats into the hot demineralized water about 90 ℃ with high-temperature steam, later gets into the female pipe 22 of hot demineralized water, installs isolating valve 26 on the female pipe 22 of hot demineralized water. The water replenishing heater 2 is connected with the deaerator 3 through the hot demineralized water main pipe 22, hot demineralized water enters the deaerator 3 along the hot demineralized water main pipe 22, and deaerating treatment is carried out on the hot demineralized water in the deaerator 3. The deaerator 3 is connected with a feed pump 5 through a heat desalination and deoxidation main water pipe 21 provided with an isolation valve 27, the feed pump 5 is connected with the steam boiler 4 through a feed pipe 12, the isolation valve 22 and a water flow monitoring device 17 are arranged on the feed pipe 12, the water flow monitoring device 17 is connected with the DCS system 11, and the water flow monitoring device 17 is used for monitoring the flow entering the steam boiler 4. The hot desalted water after the deoxidization treatment is pumped into the steam boiler 4 by a steam-electricity coupling water supply device through a water supply pipe 12 along a main pipe 21 communicated with the deaerator 3 and the hot desalted and deoxidated water, and is heated into high-temperature steam in the steam boiler 4 to provide heat energy for the outside. The steam boiler 4 is connected with the water replenishing heater 2 through a first steam pipeline 14, and an isolation valve 24 is arranged on the first steam pipeline 14.
The steam-electricity coupling water supply device is formed by connecting a water supply pump 5, a motor 6 and a steam turbine 7 in sequence through connecting shafts 13 and 13' in a coaxial mode. The motor 6 is controlled by a frequency converter 8, the steam turbine 7 is connected with the steam boiler 4 through a second steam pipeline 15, steam is provided by the steam boiler 4, an electric isolation valve 16 is installed on the second steam pipeline 15, and the electric isolation valve 16 is connected with the UPS power supply 10 and provides power. The steam turbine 7 is connected with single PLC switch board 9, and DCS system 11 is connected to single PLC switch board 9, realizes the control to steam turbine 7, and PLC switch board 9 is provided electric power by UPS power 10.
When the variable-frequency water supply device is used, under the condition that the bearings are well lubricated, the variable-frequency motor controls the rotating speed of the water supply pump to supply water to the boiler, the steam driven pump performs corresponding power supplement according to the steam exhaust amount, and the steam turbine can adjust the output power according to the change of the water supplement flow and the water supplement temperature and enables the water supply pump to work in a high-efficiency stage at the same ratio.
The utility model has the advantages that:
the system adopts the coupling linkage of the steam turbine and the motor to replace the motor to drag the water feeding pump, so that the loss of the effective power of the water feeding pump can be effectively reduced, and the power consumption rate of a thermal power plant is reduced.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes or equivalents may be substituted for elements thereof by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.
Claims (6)
1. A steam-electricity coupling energy-saving water supply system comprises a water melting station (1), a water supplementing heater (2), a deaerator (3), a steam boiler (4), a plurality of isolation valves, water pipes and steam pipelines, and is characterized by further comprising a steam-electricity coupling water supply device and a control system thereof, wherein the steam-electricity coupling water supply device is formed by coaxially connecting a water supply pump (5), a motor (6) and a steam turbine (7) through connecting shafts (13, 13').
2. The steam-electric coupling energy-saving water supply system according to claim 1, wherein the water melting station (1) is in isolatable connection with the water supplementing heater (2) through a cold demineralized water main pipe (20), and the water supplementing heater (2) is in isolatable connection with the deaerator (3) through a hot demineralized water main pipe (22).
3. The steam-electricity coupling energy-saving water supply system according to claim 2, wherein the deaerator (3) is separably connected with the water feed pump (5) through a thermal desalination and deoxidation water main pipe (21), the water feed pump (5) is connected with the steam boiler (4) through a water feed pipe (12), an isolation valve (22) and a water flow monitoring device (17) are installed on the water feed pipe (12), and the water flow monitoring device (17) is connected with the DCS system (11).
4. A steam-electric coupling energy-saving water supply system according to claim 3, characterized in that the steam boiler (4) is connected with the water supplementing heater (2) through a first steam pipeline (14), an isolation valve (24) is arranged on the first steam pipeline (14), the steam boiler (4) provides steam, the steam boiler (4) is connected with the steam turbine (7) through a second steam pipeline (15), and the isolation valve (16) is arranged on the second steam pipeline (15).
5. A steam-electric coupling energy-saving water supply system according to claim 4, characterized in that the motor (6) is controlled by a frequency converter (8), the steam turbine (7) is connected with a single PLC control cabinet (9), the single PLC control cabinet (9) is connected with a DCS system (11), and the PLC control cabinet (9) is connected with a UPS power supply (10).
6. The steam-electric coupling energy-saving water supply system according to claim 4, wherein the isolation valve (16) is an electric isolation valve, and the isolation valve (16) is connected with the UPS power supply (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121877602.7U CN218266043U (en) | 2021-08-11 | 2021-08-11 | Steam-electricity coupling energy-saving water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121877602.7U CN218266043U (en) | 2021-08-11 | 2021-08-11 | Steam-electricity coupling energy-saving water supply system |
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| Publication Number | Publication Date |
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| CN218266043U true CN218266043U (en) | 2023-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121877602.7U Active CN218266043U (en) | 2021-08-11 | 2021-08-11 | Steam-electricity coupling energy-saving water supply system |
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| CN (1) | CN218266043U (en) |
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2021
- 2021-08-11 CN CN202121877602.7U patent/CN218266043U/en active Active
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