Exhaust valve for outlet pipe of high-temperature molten salt pump
By designing an exhaust valve on the outlet pipe of the high-temperature molten salt pump and adopting a separate recirculation exhaust pipe and multiple sets of independent pipelines, the problems of pressure buildup and dry grinding during the start-up and shutdown of the high-temperature molten salt pump are solved, and the stable operation and high-frequency use of the equipment are achieved.
Patent Information
- Application Number
- CN202422468265.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-10-12
AI Technical Summary
The high-temperature molten salt pump cannot be effectively vented when starting and stopping the pump, resulting in pressure buildup and dry grinding, causing pump shaft clearance, shaft drift and component damage, and cannot operate at high frequency.
A high-temperature molten salt pump outlet pipe exhaust valve is designed, including a separate recirculation exhaust pipe and multiple sets of independent outlet pipelines, to ensure stable molten salt flow during startup and operation, reduce pressure buildup and dry grinding, and provide backup pipelines to deal with failures.
It improves system stability and equipment reliability, reduces failure rate and downtime, and ensures efficient and safe power station operation.
Smart Images
Figure CN223387511U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tower-type molten salt solar thermal power station equipment, in particular to an exhaust valve for an outlet pipe of a high-temperature molten salt pump. Background Art
[0002] As one of the core equipment of the power station, the high-temperature molten salt pump has a very large impact on the increase in power generation. Therefore, the maintenance and safe and stable operation of the high-temperature molten salt pump are particularly important. By reviewing the previous operation and maintenance records of the high-temperature molten salt pump, it was found that the operation cycle of the project's high-temperature molten salt pump ranges from 6 months to 1 year, and during normal operation, the vibration is high and it cannot operate at a high frequency, which poses a "bottleneck" to the increase in power generation.
[0003] The existing high-temperature molten salt pump has the following problems: the operating and maintenance instructions of the high-temperature molten salt pump stipulate that the molten salt pump must not operate at the minimum flow rate and with the outlet door closed for a long time, and that it needs to be fully exhausted during startup. However, due to the design of the high-temperature molten salt pump on site, exhaust cannot be performed during startup, and each high-temperature molten salt pump does not have a separate recirculation. When the pumps are connected or shut down, the pump is in a state of pump pressure buildup and dry grinding for a long time, and the minimum flow rate at the pump outlet cannot be ensured. In addition, there is a large impact force on the pump shaft during startup and shutdown, which causes the pump shaft clearance, shaft drift and components to be damaged to varying degrees. In the long run, this leads to serious wear of the high-temperature molten salt pump sleeve and inability to operate at high frequency.
[0004] Therefore, in order to solve the above problems, a high-temperature molten salt pump outlet pipe exhaust valve is proposed. Utility Model Content
[0005] In order to make up for the shortcomings of the existing technology, the problem of being unable to exhaust during startup was solved, and each high-temperature molten salt pump was not recycled separately. When the pumps were connected or stopped, it was in a state of pump pressure buildup and dry grinding for a long time, and the minimum flow rate at the pump outlet could not be ensured. There was a large impact force on the pump shaft during start-up and shutdown, causing the pump shaft clearance, shaft drift and components to be damaged to varying degrees. In the long run, the high-temperature molten salt pump shaft sleeve was severely worn and could not be operated at high frequency.
[0006] The technical solution adopted by the present invention to solve its technical problems is: a high-temperature molten salt pump outlet pipe exhaust valve described in the present invention includes a high-temperature molten salt storage tank, the top of the high-temperature molten salt storage tank is connected to a first outlet pipeline, and the left side of the first outlet pipeline is connected to a second outlet pipeline, and a third outlet pipeline is arranged on the left side of the second outlet pipeline, a first electric adjustment valve is installed on the right side of the first outlet pipeline, and the right side of the first electric adjustment valve is connected to an intermediate pipeline, a recirculation electric adjustment valve is installed on the top of the intermediate pipeline, and the top of the recirculation electric adjustment valve is connected to a recirculation exhaust pipe.
[0007] Preferably, a second electric regulating valve is installed on the right side of the intermediate pipeline, and the right side of the second electric regulating valve is connected to a main pipe.
[0008] Preferably, the high-temperature molten salt storage tank forms a communicating structure with the first outlet pipeline, the second outlet pipeline, and the third outlet pipeline, and there are three independent groups of pipelines at the rear of the first outlet pipeline, the second outlet pipeline, and the third outlet pipeline.
[0009] Preferably, the first outlet pipeline forms a communication structure with the intermediate pipeline through the first electric regulating valve, and the intermediate pipeline forms a communication structure with the recirculation exhaust pipe through the recirculation electric regulating valve.
[0010] Preferably, the first outlet pipeline, the second outlet pipeline, the third outlet pipeline and a group of recycling exhaust pipes are connected, and the recycling exhaust pipes and the high-temperature molten salt storage tank form a connecting structure.
[0011] Preferably, the first electric regulating valve forms a communication structure with the main pipe through the second electric regulating valve, and the first outlet pipeline, the second outlet pipeline, and the third outlet pipeline are all connected to a group of main pipes.
[0012] Preferably, the rear parts of the first outlet pipeline, the second outlet pipeline and the third outlet pipeline are each installed with an independent first electric regulating valve, a second electric regulating valve and a recirculation electric regulating valve, and two of the three groups of pipelines of the first outlet pipeline, the second outlet pipeline and the third outlet pipeline are in working state and one group is in backup state.
[0013] The utility model is beneficial in that:
[0014] 1. The utility model provides a separate recirculation exhaust pipe. During the pump startup or operation, the separate recirculation exhaust pipe can guide excess flow back to the high-temperature molten salt storage tank, preventing the second electric regulating valve from operating in a low-flow or no-flow state, reducing pressure buildup. The provision of the recirculation exhaust pipe helps improve the stability and performance of the entire system, ensuring efficient operation of the power station.
[0015] 2. This utility model can ensure a stable molten salt flow rate during the startup and operation of the second electric regulating valve, reducing equipment wear caused by pressure buildup and dry grinding. At the same time, the modified system can effectively control the operating state of the second electric regulating valve, reducing vibration caused by pressure buildup and dry grinding of the second electric regulating valve, thereby reducing the failure rate and improving equipment reliability.
[0016] 3. The utility model designs the outlet pipeline into three groups: the first outlet pipeline, the second outlet pipeline, and the third outlet pipeline. Two of the groups are in working state and one group is in backup state. When one of the working pipelines fails, it can immediately switch to the backup pipeline to ensure the continuous operation of the system and reduce the downtime caused by pipeline failure. The existence of the backup pipeline provides additional safety protection, ensuring that it can be switched quickly in an emergency and avoiding safety accidents caused by pipeline problems. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0018] Figure 1 It is a schematic diagram of the two-dimensional structure of the overall pipeline of the utility model.
[0019] In the figure: 1. High-temperature molten salt storage tank; 2. First outlet pipeline; 3. Second outlet pipeline; 4. Third outlet pipeline; 5. First electric adjustment valve; 6. Intermediate pipeline; 7. Second electric adjustment valve; 8. Main pipe; 9. Recirculation electric adjustment valve; 10. Recirculation exhaust pipe. DETAILED DESCRIPTION
[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0021] Example 1
[0022] like Figure 1As shown, a high-temperature molten salt pump outlet pipe exhaust valve includes a high-temperature molten salt storage tank 1, the top of the high-temperature molten salt storage tank 1 is connected to a first outlet pipeline 2, and the left side of the first outlet pipeline 2 is connected to a second outlet pipeline 3, and the left side of the second outlet pipeline 3 is provided with a third outlet pipeline 4, the right side of the first outlet pipeline 2 is installed with a first electric regulating valve 5, and the right side of the first electric regulating valve 5 is connected with an intermediate pipeline 6, the top of the intermediate pipeline 6 is installed with a recirculation electric regulating valve 9, and the top of the recirculation electric regulating valve 9 is connected with a recirculation exhaust pipe 10, the right side of the intermediate pipeline 6 is installed with a second electric regulating valve 7, and the second electric regulating valve 7 is connected with a recirculation exhaust pipe 10. The right side is connected with a mother pipe 8, and the high-temperature molten salt storage tank 1 and the first outlet pipeline 2, the second outlet pipeline 3, and the third outlet pipeline 4 all form a connecting structure, and the rear parts of the first outlet pipeline 2, the second outlet pipeline 3, and the third outlet pipeline 4 have three independent groups of pipelines; by setting a separate recycling exhaust pipe 10, the separate recycling exhaust pipe 10 can guide the excess flow back to the high-temperature molten salt storage tank 1 during the startup or operation of the pump, avoiding the second electric regulating valve 7 from operating in a low flow or no flow state, reducing the pressure holding phenomenon, and the setting of the recycling exhaust pipe 10 helps to improve the stability and performance of the entire system and ensure the efficient operation of the power station.
[0023] like Figure 1 As shown, a high-temperature molten salt pump outlet pipe exhaust valve is shown, the first outlet pipeline 2 is connected with the intermediate pipeline 6 through the first electric regulating valve 5, and the intermediate pipeline 6 is connected with the recycling exhaust pipe 10 through the recycling electric regulating valve 9. The first outlet pipeline 2, the second outlet pipeline 3, the third outlet pipeline 4 are connected with a group of recycling exhaust pipes 10, and the recycling exhaust pipe 10 is connected with the high-temperature molten salt storage tank 1. The first electric regulating valve 5 is connected with the main pipe 8 through the second electric regulating valve 7, and the first outlet pipeline 2, the second outlet pipeline 3, and the third outlet pipeline 4 are all connected to a group of main pipes 8; it can ensure that the second electric regulating valve 7 has a stable molten salt flow during startup and operation, reduce equipment wear caused by pressure buildup and dry grinding, and at the same time, the modified system can effectively control the operating state of the second electric regulating valve 7, reduce the vibration caused by pressure buildup and dry grinding of the second electric regulating valve 7, thereby reducing the failure rate and improving the reliability of the equipment.
[0024] like Figure 1As shown, a high-temperature molten salt pump outlet pipe exhaust valve, the rear parts of the first outlet pipeline 2, the second outlet pipeline 3, and the third outlet pipeline 4 are all installed with independent first electric regulating valves 5, second electric regulating valves 7 and recirculation electric regulating valves 9, and two of the three groups of pipelines of the first outlet pipeline 2, the second outlet pipeline 3, and the third outlet pipeline 4 are in working state, and one group is in backup state; the outlet pipeline is designed into three groups of the first outlet pipeline 2, the second outlet pipeline 3, and the third outlet pipeline 4, two of which are in working state and one group is in backup state. When one of the working pipelines fails, it can be immediately switched to the backup pipeline to ensure the continuous operation of the system and reduce the downtime caused by pipeline failure. The existence of the backup pipeline provides additional safety protection, ensuring that it can be quickly switched in an emergency and avoiding safety accidents caused by pipeline problems.
[0025] Working principle: First, the model of the recirculation electric regulating valve 9 is DN125, and the models of the first electric regulating valve 5 and the second electric regulating valve 7 are DN200. Open the switches of the recirculation electric regulating valve 9 and the first electric regulating valve 5. At this time, make sure that the second electric regulating valve 7 is in the closed state. Then open the switch of the pump on the first outlet pipeline 2. At this time, the molten salt in the high-temperature molten salt storage tank 1 will pass through the first outlet pipeline 2 through the first electric regulating valve 5. At this time, the gas in the molten salt will pass through the recirculation electric regulating valve 9 into the recirculation exhaust pipe 10. At this time, the excess gas will be guided back to the high-temperature molten salt storage tank 1. After the gas refluxes, open the switch of the second electric regulating valve 7, and then slowly close the switch of the recirculation electric regulating valve 9. At this time, the molten salt will pass through the second electric regulating valve 7 into the main pipe 8, and then pass through the main pipe 8 enters the system. When the second outlet pipeline 3 is started, it is necessary to ensure that the second electric regulating valve 7 is in the closed state, and then open the switch of the recirculation electric regulating valve 9 and the first electric regulating valve 5. At this time, the second outlet pipeline 3 can be pressurized. When its pressure reaches 0.4-0.5MP, the switch of the second electric regulating valve 7 can be opened. At the same time, the device designs the outlet pipeline into three groups: the first outlet pipeline 2, the second outlet pipeline 3, and the third outlet pipeline 4. Two groups are in working state and one group is in backup state. When one group of working pipelines fails, it can immediately switch to the backup pipeline to ensure the continuous operation of the system and reduce the downtime caused by pipeline failure. The existence of the backup pipeline provides additional safety protection, ensuring that it can be switched quickly in an emergency and avoid safety accidents caused by pipeline problems.
[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.
Claims
1. A high-temperature molten salt pump outlet pipe exhaust valve, characterized by: The invention comprises a high-temperature molten salt storage tank (1), wherein the top of the high-temperature molten salt storage tank (1) is connected to a first outlet pipeline (2), and the left side of the first outlet pipeline (2) is connected to a second outlet pipeline (3), and the left side of the second outlet pipeline (3) is provided with a third outlet pipeline (4), a first electric regulating valve (5) is installed on the right side of the first outlet pipeline (2), and the right side of the first electric regulating valve (5) is connected to an intermediate pipeline (6), a recirculation electric regulating valve (9) is installed on the top of the intermediate pipeline (6), and the top of the recirculation electric regulating valve (9) is connected to a recirculation exhaust pipe (10).
2. A high-temperature molten salt pump outlet pipe exhaust valve according to claim 1, characterized in that: A second electric regulating valve (7) is installed on the right side of the intermediate pipeline (6), and the right side of the second electric regulating valve (7) is connected to a main pipe (8).
3. The high-temperature molten salt pump outlet pipe exhaust valve according to claim 1, characterized in that: The high-temperature molten salt storage tank (1) and the first outlet pipeline (2), the second outlet pipeline (3), and the third outlet pipeline (4) all form a communication structure, and the rear parts of the first outlet pipeline (2), the second outlet pipeline (3), and the third outlet pipeline (4) are provided with three mutually independent groups of pipelines.
4. The high-temperature molten salt pump outlet pipe exhaust valve according to claim 1, characterized in that: The first outlet pipeline (2) forms a communication structure with the intermediate pipeline (6) through the first electric adjustment valve (5), and the intermediate pipeline (6) forms a communication structure with the recirculation exhaust pipe (10) through the recirculation electric adjustment valve (9).
5. The high-temperature molten salt pump outlet pipe exhaust valve according to claim 4, characterized in that: The first outlet pipeline (2), the second outlet pipeline (3), and the third outlet pipeline (4) are connected to a group of recirculation exhaust pipes (10), and the recirculation exhaust pipes (10) and the high-temperature molten salt storage tank (1) form a communication structure.
6. The high-temperature molten salt pump outlet pipe exhaust valve according to claim 2, characterized in that: The first electric regulating valve (5) forms a communication structure with the main pipe (8) through the second electric regulating valve (7), and the first outlet pipeline (2), the second outlet pipeline (3), and the third outlet pipeline (4) are all connected to a group of main pipes (8).
7. The high-temperature molten salt pump outlet pipe exhaust valve according to claim 2, characterized in that: An independent first electric regulating valve (5), a second electric regulating valve (7) and a recirculation electric regulating valve (9) are installed at the rear of each of the first outlet pipeline (2), the second outlet pipeline (3) and the third outlet pipeline (4), and two of the three groups of pipelines of the first outlet pipeline (2), the second outlet pipeline (3) and the third outlet pipeline (4) are in working state and one group is in backup state.