Multi-steam-source external supply industrial steam system

Abstract

The invention belongs to the technical field of industrial steam supply, and particularly relates to a multi-steam-source external supply industrial steam system which comprises a steam turbine body, a steam generation device body, a boiler body and a main steam equipment body. A first branch pipe is fixedly installed at one end of the steam turbine body, and a steam turbine steam extraction pneumatic check valve, a steam turbine steam extraction pneumatic quick-closing valve and a steam turbine steam extraction electric stop valve are sequentially arranged on the first branch pipe in the steam flowing direction. According to the design system, the defects of the photo-thermal power station are fully considered, existing systems and equipment of the photo-thermal power station are comprehensively utilized, and it can be guaranteed that industrial steam can be stably provided for users through solar energy under various working conditions only by additionally arranging the steam generation device body and accessory devices of the steam generation device body. The problem that a solar thermal power generation system cannot provide stable industrial steam for a user under the working conditions of illumination resource fluctuation, unit load change, user side demand change and the like is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial steam supply, in particular to an external industrial steam supply system with multiple steam sources. Background Art

[0002] Guided by the "dual carbon" goal, solar thermal power generation technology and applications have developed rapidly in recent years. The solar thermal power generation system collects solar heat through the collector field, and the heat transfer fluid sends the collected heat to the exchange system and heat storage system. The steam generated by the heat exchange system is used to supply steam turbine power generation and external industrial steam. The heat stored in the heat storage device is sent to the heat exchange system as a heat source at night or when the heat collected by the collector field is insufficient, generating steam for steam turbine power generation and external industrial steam.

[0003] Usually, industrial users need steam to maintain the operation of process systems and heating systems while they have a demand for electricity. The steam they need is usually at a lower pressure and temperature. Traditional industrial steam supply methods are usually designed with reference to the thermal power field, using external industrial steam supply such as low-pressure extraction steam from the steam turbine heat recovery system, cold reheat extraction steam, hot reheat extraction steam, and main steam high and low pressure bypass extraction steam.

[0004] Since solar thermal power generation is greatly affected by the weather, if the design is based on the traditional steam supply method in the thermal power field, the system will be highly dependent on the steam turbine unit. When the light resources are poor and the load of the steam turbine unit fluctuates greatly, using only the steam turbine unit will not be able to guarantee the stability of the temperature, pressure and flow of the externally supplied industrial steam.

[0005] To this end, the present invention provides an external industrial steam supply system with multiple steam sources. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: the multi-steam source external industrial steam supply system described in the present invention comprises a steam turbine body, a steam generating device body, a boiler body and a main steam equipment body; a first branch pipe is fixedly installed at one end of the steam turbine body, and a steam turbine extraction pneumatic check valve, a steam turbine extraction pneumatic quick closing valve and a steam turbine extraction electric stop valve are arranged in sequence along the steam flow direction on the first branch pipe, and a mother pipe body is fixedly installed at one end of the first branch pipe away from the steam turbine body; a second branch pipe is fixedly installed at one end of the steam generating device body, and a steam electric stop valve and a steam pneumatic regulating valve of the steam generating device are arranged in sequence along the steam flow direction on the second branch pipe. throttle valve, one end of the second branch pipe away from the steam generating device body is connected to the mother pipe body; a third branch pipe is fixedly installed at one end of the boiler body, and a boiler steam electric regulating valve is arranged on the third branch pipe, and one end of the third branch pipe away from the boiler body is connected to the mother pipe body; a fourth branch pipe is fixedly installed at one end of the main steam equipment body, and a main steam electric stop valve and a main steam pressure reducing and cooling device are arranged on the fourth branch pipe in sequence along the steam flow direction, and one end of the fourth branch pipe away from the main steam equipment body is connected to the mother pipe body; the mother pipe steam pressure reducing and cooling device, the mother pipe steam pressure remote transmission measuring point, the mother pipe steam temperature remote transmission measuring point and the mother pipe steam flowmeter are installed in sequence on the mother pipe body.

[0008] Furthermore, a steam turbine extraction steam pressure remote transmission measuring point, a steam turbine extraction steam temperature remote transmission measuring point and a steam turbine extraction steam flow meter are fixedly installed on the first branch pipe.

[0009] Furthermore, the first branch pipe is provided with a first drain point, a second drain point and a third drain point which are connected with the interior. The first drain point is located between the steam turbine extraction temperature remote transmission measuring point and the steam turbine extraction pneumatic check valve, the second drain point is located between the steam turbine extraction pneumatic check valve and the steam turbine extraction pneumatic quick closing valve, and the third drain point is located between the steam turbine extraction electric stop valve and the steam turbine extraction flow meter.

[0010] Furthermore, the second branch pipe is fixedly installed with a steam pressure remote transmission measuring point of the steam generating device, a steam temperature remote transmission measuring point of the steam generating device and a steam flow meter of the steam generating device.

[0011] Furthermore, a fourth drain point and a fifth drain point connected to the interior are fixedly installed on the second branch pipe, the fourth drain point is located between the steam temperature remote transmission measurement point of the steam generating device and the steam electric stop valve of the steam generating device, and the fifth drain point is located between the steam electric stop valve of the steam generating device and the steam pneumatic regulating valve of the steam generating device.

[0012] Furthermore, a boiler steam pressure remote transmission measuring point, a boiler steam temperature remote transmission measuring point and a boiler steam flow meter are fixedly installed on the third branch pipe.

[0013] Furthermore, the third branch pipe is fixedly installed with a sixth drain point and a seventh drain point which are connected to the interior. The sixth drain point is located between the boiler steam temperature remote transmission measurement point and the boiler steam electric regulating valve, and the seventh drain point is located between the boiler steam electric regulating valve and the boiler steam flow meter.

[0014] Furthermore, the fourth branch pipe is fixedly installed with a main steam pressure remote transmission measuring point, a main steam temperature remote transmission measuring point, a main steam pressure remote transmission measuring point after decompression and cooling, a main steam temperature remote transmission measuring point after decompression and cooling, and a main steam flow meter after decompression and cooling.

[0015] Furthermore, the fourth branch pipe is fixedly provided with an eighth drain point and a ninth drain point which are connected to the interior. The eighth drain point is located between the main steam temperature remote transmission measuring point and the main steam electric stop valve, and the ninth drain point is located between the main steam pressure reducing and cooling device and the main steam pressure remote transmission measuring point after pressure reducing and cooling.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The multi-steam source external industrial steam supply system described in the present invention, when the light resources are good, uses the steam turbine body to extract steam to supply industrial steam externally, and monitors the pressure and temperature of the steam through the steam turbine extraction pressure remote transmission measuring point and the steam turbine extraction temperature remote transmission measuring point at the steam extraction port. A steam turbine extraction electric stop valve is set on the first branch pipe. This valve plays an isolation role. When the steam parameters monitored by the steam turbine extraction pressure remote transmission measuring point and the steam turbine extraction temperature remote transmission measuring point at the steam extraction port do not meet the requirements, the electric stop valve will not open. The first branch pipe is provided with a first drain point, a second drain point and a third drain point. The first branch pipe can be warmed up through the first drain point, the second drain point and the third drain point, and the drain that may be generated during the operation due to the reduction of steam superheat and other reasons is timely eliminated.

[0018] 2. The multi-steam source external industrial steam supply system described in the present invention withdraws steam from the steam turbine body to extract steam for external steam supply when the light resources are poor, and uses the steam generator body as the steam supply source. Start the steam generator body in hot standby state, and the pressure and temperature of the steam at the outlet of the steam generator body are monitored by the steam pressure remote measurement point and the steam temperature remote measurement point of the steam generator. The distributed control system of the solar thermal power station uses feedforward-feedback PID control to adjust the flow of thermal oil according to the user's steam flow and pressure requirements, so that the steam parameters at the outlet of the steam generator body meet the requirements. When the steam parameters at the outlet of the steam generator body meet the requirements, open the steam electric stop valve of the steam generator, merge the steam of the second branch pipe into the main pipe body, and when the power generation of the steam turbine body is reduced and the extraction of steam cannot meet the steam demand of the external supply user side, the first drain point, the second drain point and the third drain point on the first branch pipe are interlocked and opened.

[0019] 3. The multi-steam source external industrial steam system described in the present invention uses the steam generator body and the boiler body as steam sources at the same time when the light resources are poor. In order to ensure the stability of the pressure of the external industrial steam, the boiler body uses the flow control mode, and the steam generator body is suitable for the pressure control mode. The operator inputs the target value of the boiler output on the distributed control system of the solar thermal power station, and controls the steam flow at the outlet of the boiler body by controlling the boiler steam electric regulating valve on the third branch pipe. After the steam from the second branch pipe and the third branch pipe is merged into the main pipe body, the rotating partition of the steam turbine body extraction is slowly adjusted to withdraw the steam from the steam turbine body, and the steam turbine extraction pneumatic fast closing valve and the steam turbine extraction electric stop valve on the first branch pipe are closed. The third branch pipe is provided with the sixth drain point and the seventh drain point, and the third branch pipe can be warmed up through the sixth drain point and the seventh drain point, and the drain that may be generated during the operation due to the reduction of steam superheat and other reasons is timely eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the structure of the multi-steam source external supply industrial steam system of the present invention.

[0022] In the figure: 1. Remote measuring point for steam turbine extraction pressure; 2. Remote measuring point for steam turbine extraction temperature; 3. Pneumatic check valve for steam turbine extraction; 4. Pneumatic quick-closing valve for steam turbine extraction; 5. Electric stop valve for steam turbine extraction; 6. Flowmeter for steam turbine extraction; 7. First drain point; 8. Second drain point; 9. Third drain point; 10. Remote measuring point for steam pressure of steam generator; 11. Remote measuring point for steam temperature of steam generator; 12. Electric stop valve for steam generator; 13. Pneumatic regulating valve for steam generator; 14. Steam flowmeter for steam generator; 15. Fourth drain point; 16. Fifth drain point; 17. Remote measuring point for steam pressure of boiler; 18. Remote measuring point for steam temperature of boiler; 19. Electric regulating valve for steam of boiler; 20. Flowmeter for steam of boiler; 21. Sixth drain point; 17. Remote measuring point for steam pressure of boiler; 18. Remote measuring point for steam temperature of boiler; 19. Electric regulating valve for steam of boiler; 20. Flowmeter for steam of boiler; 21. Drain point; 22, the seventh drain point; 23, the main steam pressure remote transmission measuring point; 24, the main steam temperature remote transmission measuring point; 25, the main steam electric stop valve; 26, the main steam pressure reduction and temperature reduction device; 28, the main steam pressure remote transmission measuring point after pressure reduction and temperature reduction; 29, the main steam temperature remote transmission measuring point after pressure reduction and temperature reduction; 30, the main steam flow meter after pressure reduction and temperature reduction; 31, the eighth drain point; 32, the ninth drain point; 33, the mother pipe steam pressure reduction and temperature reduction device; 35, the mother pipe steam pressure remote transmission measuring point; 36, the mother pipe steam temperature remote transmission measuring point; 37, the mother pipe steam flow meter; 38, the turbine body; 39, the first branch pipe; 40, the steam generating device body; 41, the second branch pipe; 42, the boiler body; 43, the third branch pipe; 44, the main steam equipment body; 45, the fourth branch pipe; 46, the mother pipe body. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0024] like Figure 1 As shown, a multi-steam source external industrial steam supply system according to an embodiment of the present invention includes a steam turbine body 38, a steam generating device body 40, a boiler body 42 and a main steam equipment body 44;

[0025] A first branch pipe 39 is fixedly installed at one end of the steam turbine body 38, and a steam turbine extraction pneumatic check valve 3, a steam turbine extraction pneumatic fast closing valve 4 and a steam turbine extraction electric stop valve 5 are sequentially arranged on the first branch pipe 39 along the steam flow direction, and a mother pipe body 46 is fixedly installed at one end of the first branch pipe 39 away from the steam turbine body 38. A steam turbine extraction pressure remote transmission measuring point 1, a steam turbine extraction temperature remote transmission measuring point 2 and a steam turbine extraction flowmeter 6 are fixedly installed on the first branch pipe 39.

[0026] Specifically, the first branch pipe 39 is provided with a first drain point 7, a second drain point 8 and a third drain point 9 which are connected to the inside. The first drain point 7 is located between the steam turbine extraction temperature remote transmission measuring point 2 and the steam turbine extraction pneumatic check valve 3. The second drain point 8 is located between the steam turbine extraction pneumatic check valve 3 and the steam turbine extraction pneumatic fast closing valve 4. The third drain point 9 is located between the steam turbine extraction electric stop valve 5 and the steam turbine extraction flow meter 6.

[0027] A second branch pipe 41 is fixedly installed at one end of the steam generating device body 40, and a steam electric stop valve 12 and a steam pneumatic regulating valve 13 of the steam generating device are arranged in sequence on the second branch pipe 41 along the steam flow direction. The end of the second branch pipe 41 away from the steam generating device body 40 is connected to the main pipe body 46.

[0028] Specifically, the second branch pipe 41 is fixedly installed with a steam pressure remote measuring point 10 of the steam generating device, a steam temperature remote measuring point 11 of the steam generating device, and a steam flow meter 14 of the steam generating device. The second branch pipe 41 is fixedly installed with a fourth drain point 15 and a fifth drain point 16 connected to the inside, the fourth drain point 15 is located between the steam temperature remote measuring point 11 of the steam generating device and the steam electric stop valve 12 of the steam generating device, and the fifth drain point 16 is located between the steam electric stop valve 12 of the steam generating device and the steam pneumatic regulating valve 13 of the steam generating device.

[0029] A third branch pipe 43 is fixedly mounted at one end of the boiler body 42 , and a boiler steam electric regulating valve 19 is arranged on the third branch pipe 43 . One end of the third branch pipe 43 away from the boiler body 42 is connected to the mother pipe body 46 .

[0030] Specifically, the third branch pipe 43 is fixedly installed with a boiler steam pressure remote measuring point 17, a boiler steam temperature remote measuring point 18 and a boiler steam flow meter 20. The third branch pipe 43 is fixedly installed with a sixth drain point 21 and a seventh drain point 22 connected to the inside, the sixth drain point 21 is located between the boiler steam temperature remote measuring point 18 and the boiler steam electric regulating valve 19, and the seventh drain point 22 is located between the boiler steam electric regulating valve 19 and the boiler steam flow meter 20.

[0031] A fourth branch pipe 45 is fixedly installed at one end of the main steam equipment body 44, and a main steam electric stop valve 25 and a main steam pressure reducing and temperature reducing device 26 are arranged in sequence on the fourth branch pipe 45 along the steam flow direction. The end of the fourth branch pipe 45 away from the main steam equipment body 44 is connected to the main pipe body 46.

[0032] Specifically, the fourth branch pipe 45 is fixedly installed with a main steam pressure remote transmission measuring point 23, a main steam temperature remote transmission measuring point 24, a main steam pressure remote transmission measuring point 28 after decompression and temperature reduction, a main steam temperature remote transmission measuring point 29 after decompression and temperature reduction, and a main steam pressure remote transmission flow meter 30. The fourth branch pipe 45 is fixedly installed with an eighth drain point 31 and a ninth drain point 32 connected to the inside, the eighth drain point 31 is located between the main steam temperature remote transmission measuring point 24 and the main steam electric stop valve 25, and the ninth drain point 32 is located between the main steam pressure reduction and temperature reduction device 26 and the main steam pressure remote transmission measuring point 28 after decompression and temperature reduction.

[0033] The main pipe body 46 is provided with a main pipe steam pressure reducing and temperature reducing device 33 , a main pipe steam pressure remote transmission measuring point 35 , a main pipe steam temperature remote transmission measuring point 36 and a main pipe steam flow meter 37 in sequence.

[0034] When working, when the light resources are good, the power generation of the steam turbine body 38 is high, and the steam demand of the user can be met by only using the steam turbine body 38 to extract steam. When only using the steam turbine body 38 to extract steam to supply industrial steam, the user sends the required steam pressure, temperature, and flow rate to the solar thermal power station. The solar thermal power station adjusts the opening of the steam extraction rotating partition of the steam turbine body 38 according to the needs of the user, and monitors the pressure and temperature of the steam through the steam extraction pressure remote measurement point 1 and the steam extraction temperature remote measurement point 2 of the steam extraction port. It should be noted that there will be obvious temperature drop and pressure drop in the long-distance transportation of steam. The temperature drop and pressure drop can be calculated in the design stage, but in order to ensure the superheat of the steam, the steam pressure and temperature of the steam extraction of the steam turbine will be designed slightly higher. In the system debugging and operation stage, when the steam pressure and temperature sent to the user side through the mother pipe body 46 are higher than the needs of the user side, the mother pipe steam decompression and temperature reduction device 33 on the mother pipe body 46 can be used to adjust the pressure and temperature of the steam for a second time. The first branch pipe 39 is provided with a steam turbine extraction electric stop valve 5, which plays an isolating role. When the steam parameters monitored by the steam turbine extraction pressure remote measuring point 1 and the steam turbine extraction temperature remote measuring point 2 at the extraction port do not meet the requirements, the electric stop valve will not open. The first branch pipe 39 is provided with a first drain point 7, a second drain point 8 and a third drain point 9, through which the first branch pipe 39 can be warmed up, and the drain that may be generated during the operation due to the reduction of steam superheat and other reasons can be timely eliminated.

[0035] When the light resources are poor, the power generation of the steam turbine body 38 is low, and the steam extraction of the steam turbine body 38 cannot meet the steam demand of the user. At this time, the steam extraction of the steam turbine body 38 is withdrawn and the steam is supplied externally, and the steam generator body 40 is used as the steam supply source. When the industrial steam extracted from the steam turbine body 38 cannot meet the needs of the user, the user sends the required steam pressure, temperature, and flow rate to the solar thermal power station. The solar thermal power station starts the steam generator body 40 in the hot standby state according to the needs of the user. The pressure and temperature of the steam at the outlet of the steam generator body 40 are monitored by the steam pressure remote measurement point 10 and the steam temperature remote measurement point 11 of the steam generator. The distributed control system of the solar thermal power station uses feedforward-feedback PID control according to the steam flow and pressure requirements of the user to adjust the flow of the thermal oil so that the steam parameters at the outlet of the steam generator body 40 meet the requirements. The second branch pipe 41 connected to the steam generator body 40 is also provided with a steam electric stop valve for isolation. When the steam parameters at the outlet of the steam generator body 40 meet the requirements, the steam electric stop valve 12 of the steam generator is opened to merge the steam of the second branch pipe 41 into the main pipe body 46. At this time, the rotating partition of the steam turbine body 38 is slowly adjusted to withdraw the steam for external supply of steam from the steam turbine body 38, and the steam turbine steam extraction pneumatic fast closing valve 4 and the steam turbine steam extraction electric stop valve 5 on the first branch pipe 39 are closed. The operation after entering the main pipe body 46 is consistent with the above operation, and will not be described in detail here. The fourth drain point 15 and the fifth drain point 16 are provided on the second branch pipe 41, and the second branch pipe 41 can be warmed up through the fourth drain point 15 and the fifth drain point 16, and the drain that may be generated during the operation due to the reduction of steam superheat and other reasons is timely eliminated. When the power generation of the steam turbine body 38 is reduced and the steam extraction cannot meet the steam demand of the external user side, the first drain point 7, the second drain point 8 and the third drain point 9 on the first branch pipe 39 are interlocked and opened.

[0036] When the light resources are poor, the power generation of the steam turbine body 38 is low, and the steam extraction of the steam turbine body 38 cannot meet the steam demand of the user. At this time, the steam turbine body 38 is withdrawn to extract steam for external steam supply, and the steam generator body 40 and the boiler body 42 are used as steam supply sources at the same time. When the industrial steam extracted from the steam turbine body 38 cannot meet the needs of the user, the user sends the required steam pressure, temperature, and flow rate to the solar thermal power station. The solar thermal power station starts the steam generator body 40 and the boiler body 42 in the hot standby state according to the needs of the user. The steam pressure and temperature at the outlet of the steam generator body 40 are monitored by the steam pressure remote measurement point 10 of the steam generator and the steam temperature remote measurement point 11 of the steam generator. The steam pressure and temperature at the outlet of the boiler are monitored by the boiler steam pressure remote measurement point 17 and the boiler steam temperature remote measurement point 18. In order to ensure the stability of the pressure of the externally supplied industrial steam, the boiler body 42 uses the flow control mode, and the steam generator body 40 is suitable for the pressure control mode. The operator inputs the target value of the boiler output on the CSP distributed control system, and controls the steam flow at the outlet of the boiler body 42 by controlling the boiler steam electric regulating valve 19 on the third branch pipe 43. The CSP distributed control system uses feedforward-feedback PID control to adjust the flow of the thermal oil according to the user's steam flow and pressure requirements, and the steam flow at the outlet of the starting boiler body 42, so that the steam parameters at the outlet of the steam generating device body 40 meet the requirements. After the steam from the second branch pipe 41 and the third branch pipe 43 are merged into the main pipe body 46, the rotating partition of the steam extraction of the turbine body 38 is slowly adjusted to withdraw the steam extraction of the turbine body 38, and the steam extraction pneumatic fast closing valve 4 and the steam extraction electric stop valve 5 of the turbine on the first branch pipe 39 are closed. The control method of the main pipe steam decompression and temperature reduction device on the main pipe body is the same as the above operation, which will not be repeated here. The operation after entering the main pipe body 46 is consistent with the above operation, which will not be repeated here. The third branch pipe 43 is provided with a sixth drain point 21 and a seventh drain point 22, through which the third branch pipe 43 can be warmed up and the drain that may be generated during the operation due to the reduction of steam superheat and the like can be promptly eliminated.

[0037] The system designed in the present application includes multiple steam sources including a steam turbine body 38 , a steam generating device body 40 , a boiler body 42 and a main steam equipment body 44 . The pressure, temperature and flow rate of the branch pipes of each steam source can be controlled separately; each steam source is sent to the user side after merging into the main pipe body 46 through the branch pipe, and the pressure and temperature can be adjusted secondary on the main pipe body 46; when the solar thermal power station is affected by the weather or the load fluctuation of the steam turbine unit, resulting in the inability to extract steam through the steam turbine body 38 to meet the needs of the user side when the load is low, other steam sources can be used to supply steam at any time; the steam generating device body 40 uses the heat from the solar collector field or the heat storage system, which can enable the solar thermal power station to achieve thermal and electrical decoupling; the terminal pressures of the branch pipes of each steam source are the same, and when the steam source is switched, the fluctuations of the steam parameters can be reduced to maintain the stability of the external industrial steam supply; the system fully considers the shortcomings of the solar thermal power station and comprehensively utilizes the existing systems and equipment of the solar thermal power station. It only needs to configure the steam generating device body 40 and its ancillary devices to ensure that solar energy can be used to stably provide industrial steam to users under various working conditions. Solve the problem that the solar thermal power generation system cannot provide users with stable industrial steam when the light resources fluctuate, the unit load changes and the user-side demand changes.

[0038] Working principle: When the light resources are good, the power generation of the steam turbine body 38 is high, and the steam demand of the user can be met by only using the steam extraction of the steam turbine body 38. When only using the steam extraction of the steam turbine body 38 to supply industrial steam, the user sends the required steam pressure, temperature, and flow rate to the solar thermal power station. The solar thermal power station adjusts the opening of the steam extraction rotating partition of the steam turbine body 38 according to the needs of the user, and monitors the pressure and temperature of the steam through the steam extraction pressure remote transmission measuring point 1 and the steam extraction temperature remote transmission measuring point 2 of the steam extraction port. A steam turbine extraction electric stop valve 5 is set on the first branch pipe 39. This valve plays an isolation role. When the steam parameters monitored by the steam extraction pressure remote transmission measuring point 1 and the steam extraction temperature remote transmission measuring point 2 of the steam extraction port do not meet the requirements, the electric stop valve will not open. The first branch pipe 39 is provided with a first drain point 7, a second drain point 8 and a third drain point 9, through which the first branch pipe 39 can be warmed up, and the drain which may be generated during the operation due to the reduction of steam superheat and the like can be promptly eliminated.

[0039] When the light resources are poor, the power generation of the steam turbine body 38 is low, and the steam extraction of the steam turbine body 38 cannot meet the steam demand of the user. At this time, the steam extraction of the steam turbine body 38 is withdrawn and the steam is supplied externally, and the steam generator body 40 is used as the steam supply source. When the industrial steam extracted from the steam turbine body 38 cannot meet the needs of the user, the user sends the required steam pressure, temperature, and flow rate to the solar thermal power station. The solar thermal power station starts the steam generator body 40 in the hot standby state according to the needs of the user. The pressure and temperature of the steam at the outlet of the steam generator body 40 are monitored by the steam pressure remote measurement point 10 and the steam temperature remote measurement point 11 of the steam generator. The distributed control system of the solar thermal power station uses feedforward-feedback PID control according to the steam flow and pressure requirements of the user to adjust the flow of the thermal oil so that the steam parameters at the outlet of the steam generator body 40 meet the requirements. The second branch pipe 41 connected to the steam generator body 40 is also provided with a steam electric stop valve for isolation. When the steam parameters at the outlet of the steam generator body 40 meet the requirements, the steam electric stop valve 12 of the steam generator is opened to merge the steam of the second branch pipe 41 into the main pipe body 46. At this time, the rotating partition of the steam turbine body 38 is slowly adjusted to withdraw the steam for external supply of steam from the steam turbine body 38, and the steam turbine steam extraction pneumatic fast closing valve 4 and the steam turbine steam extraction electric stop valve 5 on the first branch pipe 39 are closed. The operation after entering the main pipe body 46 is consistent with the above operation, and will not be described in detail here. The fourth drain point 15 and the fifth drain point 16 are provided on the second branch pipe 41, and the second branch pipe 41 can be warmed up through the fourth drain point 15 and the fifth drain point 16, and the drain that may be generated during the operation due to the reduction of steam superheat and other reasons is timely eliminated. When the power generation of the steam turbine body 38 is reduced and the steam extraction cannot meet the steam demand of the external user side, the first drain point 7, the second drain point 8 and the third drain point 9 on the first branch pipe 39 are interlocked and opened.

[0040] When the light resources are poor, the power generation of the steam turbine body 38 is low, and the steam extraction of the steam turbine body 38 cannot meet the steam demand of the user. At this time, the steam turbine body 38 is withdrawn to extract steam for external steam supply, and the steam generator body 40 and the boiler body 42 are used as steam supply sources at the same time. When the industrial steam extracted from the steam turbine body 38 cannot meet the needs of the user, the user sends the required steam pressure, temperature, and flow rate to the solar thermal power station. The solar thermal power station starts the steam generator body 40 and the boiler body 42 in the hot standby state according to the needs of the user. The steam pressure and temperature at the outlet of the steam generator body 40 are monitored by the steam pressure remote measurement point 10 of the steam generator and the steam temperature remote measurement point 11 of the steam generator. The steam pressure and temperature at the outlet of the boiler are monitored by the boiler steam pressure remote measurement point 17 and the boiler steam temperature remote measurement point 18. In order to ensure the stability of the pressure of the externally supplied industrial steam, the boiler body 42 uses the flow control mode, and the steam generator body 40 is suitable for the pressure control mode. The operator inputs the target value of the boiler output on the CSP distributed control system, and controls the steam flow at the outlet of the boiler body 42 by controlling the boiler steam electric regulating valve 19 on the third branch pipe 43. The CSP distributed control system uses feedforward-feedback PID control to adjust the flow of the thermal oil according to the user's steam flow and pressure requirements, and the steam flow at the outlet of the starting boiler body 42, so that the steam parameters at the outlet of the steam generating device body 40 meet the requirements. After the steam from the second branch pipe 41 and the third branch pipe 43 are merged into the main pipe body 46, the rotating partition of the steam extraction of the turbine body 38 is slowly adjusted to withdraw the steam extraction of the turbine body 38, and the steam extraction pneumatic fast closing valve 4 and the steam extraction electric stop valve 5 of the turbine on the first branch pipe 39 are closed. The control method of the main pipe steam decompression and temperature reduction device on the main pipe body is the same as the above operation, which will not be repeated here. The operation after entering the main pipe body 46 is consistent with the above operation, which will not be repeated here. The third branch pipe 43 is provided with a sixth drain point 21 and a seventh drain point 22, through which the third branch pipe 43 can be warmed up and the drain that may be generated during the operation due to the reduction of steam superheat and the like can be promptly eliminated.

[0041] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A multi-source external industrial steam supply system, characterized in that: It includes a steam turbine body (38), a steam generating device body (40), a boiler body (42) and a main steam equipment body (44); A first branch pipe (39) is fixedly mounted on one end of the steam turbine body (38); a steam turbine extraction pneumatic check valve (3), a steam turbine extraction pneumatic fast closing valve (4) and a steam turbine extraction electric stop valve (5) are sequentially arranged on the first branch pipe (39) along the steam flow direction; a main pipe body (46) is fixedly mounted on one end of the first branch pipe (39) away from the steam turbine body (38); A second branch pipe (41) is fixedly mounted on one end of the steam generating device body (40); a steam electric stop valve (12) of the steam generating device and a steam pneumatic regulating valve (13) of the steam generating device are arranged in sequence on the second branch pipe (41) along the steam flow direction; and an end of the second branch pipe (41) away from the steam generating device body (40) is connected to the main pipe body (46); A third branch pipe (43) is fixedly mounted on one end of the boiler body (42), a boiler steam electric regulating valve (19) is arranged on the third branch pipe (43), and an end of the third branch pipe (43) away from the boiler body (42) is connected to the mother pipe body (46); A fourth branch pipe (45) is fixedly mounted on one end of the main steam equipment body (44); a main steam electric stop valve (25) and a main steam pressure reducing and temperature reducing device (26) are sequentially arranged on the fourth branch pipe (45) along the steam flow direction; and an end of the fourth branch pipe (45) away from the main steam equipment body (44) is connected to the main pipe body (46); The mother pipe body (46) is sequentially installed with a mother pipe steam pressure reducing and temperature reducing device (33), a mother pipe steam pressure remote transmission measuring point (35), a mother pipe steam temperature remote transmission measuring point (36) and a mother pipe steam flow meter (37).

2. The multi-steam source external industrial steam supply system according to claim 1, characterized in that: The first branch pipe (39) is fixedly mounted with a steam turbine extraction steam pressure remote transmission measuring point (1), a steam turbine extraction steam temperature remote transmission measuring point (2) and a steam turbine extraction steam flow meter (6).

3. The multi-steam source external industrial steam supply system according to claim 2 is characterized in that: The first branch pipe (39) is provided with a first drain point (7), a second drain point (8) and a third drain point (9) which are connected to the interior. The first drain point (7) is located between the steam turbine extraction temperature remote transmission measuring point (2) and the steam turbine extraction pneumatic check valve (3). The second drain point (8) is located between the steam turbine extraction pneumatic check valve (3) and the steam turbine extraction pneumatic fast closing valve (4). The third drain point (9) is located between the steam turbine extraction electric stop valve (5) and the steam turbine extraction flow meter (6).

4. The multi-steam source external industrial steam supply system according to claim 1, characterized in that: The second branch pipe (41) is fixedly mounted with a steam pressure remote measurement point (10) of the steam generating device, a steam temperature remote measurement point (11) of the steam generating device, and a steam flow meter (14) of the steam generating device.

5. The multi-steam source external industrial steam supply system according to claim 4, characterized in that: A fourth drain point (15) and a fifth drain point (16) which are in communication with the interior are fixedly mounted on the second branch pipe (41); the fourth drain point (15) is located between the steam temperature remote transmission measuring point (11) of the steam generating device and the steam electric stop valve (12) of the steam generating device; and the fifth drain point (16) is located between the steam electric stop valve (12) of the steam generating device and the steam pneumatic regulating valve (13) of the steam generating device.

6. The multi-steam source external industrial steam supply system according to claim 1, characterized in that: The third branch pipe (43) is fixedly mounted with a boiler steam pressure remote measurement point (17), a boiler steam temperature remote measurement point (18) and a boiler steam flow meter (20).

7. The multi-steam source external industrial steam supply system according to claim 6, characterized in that: A sixth drain point (21) and a seventh drain point (22) which are connected to the interior are fixedly mounted on the third branch pipe (43); the sixth drain point (21) is located between the boiler steam temperature remote transmission measuring point (18) and the boiler steam electric regulating valve (19); and the seventh drain point (22) is located between the boiler steam electric regulating valve (19) and the boiler steam flow meter (20).

8. The multi-steam source external industrial steam supply system according to claim 1, characterized in that: The fourth branch pipe (45) is fixedly mounted with a main steam pressure remote transmission measuring point (23), a main steam temperature remote transmission measuring point (24), a main steam pressure remote transmission measuring point (28) after decompression and temperature reduction, a main steam temperature remote transmission measuring point (29) after decompression and temperature reduction, and a main steam flow meter (30) after decompression and temperature reduction.

9. The multi-steam source external industrial steam supply system according to claim 8, characterized in that: An eighth drain point (31) and a ninth drain point (32) which are in communication with the interior are fixedly mounted on the fourth branch pipe (45); the eighth drain point (31) is located between the main steam temperature remote transmission measuring point (24) and the main steam electric stop valve (25); and the ninth drain point (32) is located between the main steam pressure reducing and temperature reducing device (26) and the main steam pressure remote transmission measuring point (28) after pressure reducing and temperature reducing.

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