Water vapor vacuum pump cooling water power generation system and method

Abstract

The invention provides a water vapor vacuum pump cooling water power generation system and method, and particularly relates to the technical field of energy conservation and environmental protection, and the system comprises a cooling water circulation module, a potential energy power generation module, a power storage module and a control module. In the cooling water circulation module, a water supply pump pumps cooling water in a water storage tank into a water distributor, the cooling water is shunted to a condenser group through a branch pipeline to exchange heat with high-temperature steam, and the cooling water flows into a recovery water tank through a drain pipe which forms a gravitational potential energy fall water flow channel. In the potential energy power generation module, an impeller device is vertically connected to the outlet end of the drainage pipe, gravity water flow impacts the impeller device to convert potential energy into mechanical energy, the mechanical energy is synchronously transmitted to a generator through a coupler, and the generator converts the mechanical energy into electric energy. And the power storage module stores electric energy and is called by power grid equipment. The control module automatically starts and stops the water supply pump according to the liquid level data of the recovery pool, maintains cooling water circulation and power generation balance, and achieves energy conservation, environmental protection and operation cost optimization.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy saving and environmental protection, in particular to a water vapor vacuum pump cooling water power generation system and method. BACKGROUND

[0002] As the core equipment in the fields of metallurgy and chemical industry, water vapor jet vacuum pumps are widely used due to their stable pumping performance. With the continuous expansion of production capacity, the energy consumption of equipment is becoming increasingly critical: a single vacuum pump needs to consume thousands of cubic meters of cooling water per hour, and the supporting water circulation system not only increases the operating cost, but more importantly, the condenser installed at a high position has a significant drop, and a large amount of cooling water carries considerable gravitational potential energy that is not recovered, resulting in a huge structural waste of energy.

[0003] The current industry generally uses a multi-stage condensing structure to reduce steam consumption, which can alleviate the load of the vacuum pump at the later stage, but does not address the fundamental problem of energy recovery. The cooling water circulation process still relies on a water pump driven by electricity to maintain water flow, which is a "water for electricity" mode that adds new energy consumption, making the system fall into a dilemma of "solving cooling needs but increasing energy consumption burden".

[0004] In summary, how to efficiently capture and convert the gravitational potential energy of cooling water during the drainage process is a technical bottleneck that needs to be broken through. SUMMARY

[0005] The main purpose of the present application is to provide a water vapor vacuum pump cooling water power generation system and method to at least solve the technical problem of how to efficiently capture and convert the gravitational potential energy of cooling water during the drainage process, so as to directly convert the gravitational potential energy of cooling water into electrical energy and store it through the integrated power generation device, significantly reduce the comprehensive energy consumption of the system, and realize energy saving and environmental protection and operation cost optimization.

[0006] In order to achieve the above-mentioned purpose, the present application provides a water vapor vacuum pump cooling water power generation system and method.

[0007] In a first aspect, the present application provides a cooling water power generation system for a water vapor vacuum pump, which comprises a cooling water circulation module, a potential energy power generation module, a power storage module and a control module. The cooling water circulation module comprises a water supply pump, a water distributor, a condenser group, a drain pipe and a water recovery tank connected in sequence by pipelines. The potential energy power generation module comprises an impeller device, a generator and a shaft coupling. The water inlet of the impeller device is connected to the outlet end of the drain pipe by a flange. The rotating shaft of the impeller device is coaxially connected to the input shaft of the generator by the shaft coupling. The power storage module is connected to the output end of the generator by a cable. The control module is connected to the driving motor of the water supply pump and the control end of the generator by a cable. The water supply pump is connected to the water storage tank by a pipeline to pump cooling water into the water distributor. The water distributor is connected to the condenser group by branch pipelines to divide the cooling water into each stage of the condenser group. The condenser group exchanges heat with the high-temperature steam discharged by the vacuum pump to condense the steam. The drain pipe is vertically arranged between the water outlet of the condenser group and the water recovery tank to form a water flow channel with a gravitational potential energy difference. The impeller device is impacted by the gravity water flow to convert potential energy into mechanical energy of the impeller rotation. The shaft coupling synchronously transmits the mechanical rotation to the generator by coaxially connecting the rotating shaft of the impeller device and the input shaft of the generator. The generator converts mechanical energy into electrical energy by electromagnetic induction. The power storage module stores electrical energy for power grid equipment to call. The control module automatically starts and stops the water supply pump according to the liquid level data of the water recovery tank to maintain the balance between cooling water circulation and power generation.

[0008] Specifically, the condenser group comprises a first condenser, a second condenser and a third condenser. The water inlet of the first condenser is connected to the water distributor by a first branch pipeline. The water inlet of the second condenser is connected to the water distributor by a second branch pipeline. The water inlet of the third condenser is connected to the water distributor by a third branch pipeline. The water outlets of the first, second and third condensers are all connected to the drain pipe by vertical pipelines.

[0009] Specifically, the first end of the shaft coupling is sleeved with the end of the rotating shaft of the impeller device, and the second end is sleeved with the head of the input shaft of the generator, and is fixed by a set screw.

[0010] Specifically, the control module comprises a PLC controller and a liquid level sensor. The liquid level sensor is installed on the inner wall of the water recovery tank and is connected to the input end of the PLC controller by a cable. The output end of the PLC controller is connected to the driving motor circuit of the water supply pump.

[0011] Specifically, the cooling water circulation module further comprises a return water pump, a filter, a cooling tower and a water storage tank; the water inlet of the return water pump is communicated with the bottom of the water storage tank through a pipeline, and the water outlet is connected with the water inlet of the filter; the water outlet of the filter is connected with the water inlet of the cooling tower; the water outlet of the cooling tower is communicated with the water storage tank; and the water inlet of the water supply pump is connected with the bottom of the water storage tank through a pipeline.

[0012] Specifically, the storage power module comprises a charge-discharge controller and a battery pack; the input end of the charge-discharge controller is connected with the output end of the generator through a cable, and the output end of the charge-discharge controller is connected with the electrode of the battery pack.

[0013] In a second aspect, the present application provides a water vapor vacuum pump cooling water power generation method, which is applied to the water vapor vacuum pump cooling water power generation system of the first aspect, and comprises the following steps: S1 water storage starting step: when the liquid level of the water storage tank reaches a first set value, the water supply pump is started through the control module, and the inlet valve and the outlet valve of the water distributor are opened synchronously; S2 cooling water distribution step: the cooling water is pumped into the water distributor by the water supply pump, and flows into each stage of the condenser group through the branch pipelines of the water distributor respectively; S3 power generation triggering step: after the cooling water flowing through the condenser group absorbs the heat of the high-temperature steam, the cooling water is discharged through the vertically arranged drain pipe, the gravity water flow impacts the impeller device of the gravity water flow impact potential energy power generation module, the impeller device rotates and drives the generator to generate electricity through the shaft coupling; S4 electric energy storage step: the electric energy generated by the generator is transmitted to the storage power module for storage through the cable; S5 circulation control step: when the liquid level of the water recovery tank reaches a second set value, the return water pump is started through the control module, and the cooling water returns to the water storage tank after flowing through the filter and the cooling tower in turn.

[0014] Specifically, in the S1 water storage starting step, the PLC controller of the control module monitors the liquid level sensor data of the water storage tank in real time, and when the liquid level exceeds the first set value, the water supply pump starting instruction is triggered automatically.

[0015] Specifically, after the S5 circulation control step, the method further comprises: S6 shutdown control step: when the system needs to stop running, the water supply pump is closed first through the control module, the return water pump is closed after the liquid level of the water recovery tank is stable, the cable connection between the generator and the storage power module is disconnected, and the filter and the cooling tower are closed synchronously.

[0016] The water vapor vacuum pump cooling water power generation system and method provided by the application, the system comprises a cooling water circulation module, a potential energy power generation module, a power storage module and a control module. In the cooling water circulation module, a water supply pump pumps cooling water in a water storage pool into a water distributor, and the cooling water is branched to the condenser group and high-temperature steam through branch pipes for heat exchange, and the cooling water flows into a recovery water pool through a vertically arranged drain pipe, forming a gravity potential energy difference. In the potential energy power generation module, an impeller device is vertically connected to the outlet end of the drain pipe, and the gravity water flow impacts the impeller device, converting the potential energy into mechanical energy, which is synchronously transmitted to a generator through a shaft coupling, and the generator converts the mechanical energy into electrical energy. The power storage module stores electrical energy and supplies the power grid equipment. The control module automatically starts and stops the water supply pump according to the liquid level data of the recovery water pool, maintaining the balance between cooling water circulation and power generation. The system efficiently captures and converts the gravity potential energy of the cooling water, directly converts it into electrical energy storage, significantly reduces the comprehensive energy consumption of the system, and realizes energy saving and environmental protection and operation cost optimization. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification. The embodiments of the application, and of the description of the embodiments, are to explain the application and are not intended to limit the application in any manner. Figure 1 A structure schematic diagram of the water vapor vacuum pump cooling water power generation system provided by the application; Figure 2 A structure schematic diagram of the potential energy power generation module of the water vapor vacuum pump cooling water power generation system provided by the application; Figure 3 A structure schematic diagram of the impeller device of the water vapor vacuum pump cooling water power generation system provided by the application; Figure 4 A flow schematic diagram of the water vapor vacuum pump cooling water power generation method provided by the application.

[0018] 10, cooling water circulation module; 11, water supply pump; 12, water distributor; 13, condenser group; 131, first condenser; 132, second condenser; 133, third condenser; 14, drain pipe; 15, recovery water pool; 16, backwater pump; 17, filter; 18, cooling tower; 19, water storage pool; 20, potential energy power generation module; 21, impeller device; 22, generator; 23, shaft coupling; 30, power storage module; 40, control module; 41, PLC controller; 42, liquid level sensor.

[0019] Through the above drawings, the specific embodiments of the application have been shown, and will be described in more detail hereinafter. These drawings and the written description are not intended to limit the scope of the concept of the application in any way, but to illustrate the concept of the application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0020] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are only some, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0021] The terms "first", "second", "third", "fourth" and the like in the description of the present application and in the appended claims, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of the terms so termed herein is to be interpreted to allow that combinations of the recited features can come in any sequence or order.

[0022] In the present application, the words "exemplary" and "for example" are used to mean example, illustration, or instance, and do not imply any preference or superiority. In the present application, any embodiment or design scheme described as "exemplary" or "for example" should not be interpreted as being more preferred or superior to other embodiments or design schemes. Rather, the use of "exemplary" or "for example" is intended to present concepts in a particular manner.

[0023] The water vapor vacuum pump cooling water power generation system and method provided by the present application comprises a cooling water circulation module, a potential energy power generation module, a stored power module and a control module. The cooling water circulation module circulates the cooling water through a water supply pump, a water distributor, a condenser set, a drain pipe and a recovery water pool, and the drain pipe forms a gravity potential energy drop. In the potential energy power generation module, the impeller device is impacted by the gravity water flow, drives the generator through the shaft coupling, and converts the potential energy into electric energy. The stored power module stores the electric energy for calling. The control module starts and stops the water supply pump according to the liquid level data of the recovery water pool, maintains the balance between the cooling water circulation and power generation, and realizes energy saving and consumption reduction.

[0024] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described again in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0025] As Figure 1As shown, the water vapor vacuum pump cooling water power generation system provided by the embodiment includes a cooling water circulation module 10, a potential energy power generation module 20, a storage power module 30, and a control module 40. The cooling water circulation module 10 includes a water supply pump 11, a water distributor 12, a condenser group 13, a drain pipe 14, and a recovery water pool 15 connected in sequence by pipelines. The potential energy power generation module 20 includes an impeller device 21, a generator 22, and a shaft coupling 23. The water inlet of the impeller device 21 is connected to the outlet end of the drain pipe 14 by a flange. The rotating shaft of the impeller device 21 is coaxially connected to the input shaft of the generator 22 through the shaft coupling 23. The storage power module 30 is connected to the output end of the generator 22 by a cable. The control module 40 is connected to the driving motor of the water supply pump 11 and the control end of the generator 22 by a cable. The water supply pump 11 is connected to the water storage pool by a pipeline to pump cooling water into the water distributor 12. The water distributor 12 is connected to the condenser group 13 by branch pipelines to distribute cooling water to each stage of the condenser group 13. The condenser group 13 exchanges heat with the high-temperature steam discharged by the vacuum pump through cooling water to condense the steam. The drain pipe 14 is vertically arranged between the water outlet of the condenser group 13 and the recovery water pool 15 to form a water flow channel with a gravitational potential energy difference. The impeller device 21 converts potential energy into mechanical energy through the impact of gravity water flow. The shaft coupling 23 synchronously transmits mechanical rotation to the generator 22 by coaxially connecting the rotating shaft of the impeller device 21 and the input shaft of the generator 22. The generator 22 converts mechanical energy into electrical energy through electromagnetic induction. The storage power module 30 stores electrical energy for power grid equipment to call. The control module 40 automatically starts and stops the water supply pump 11 according to the liquid level data of the recovery water pool 15 to maintain the balance between cooling water circulation and power generation.

[0026] Specifically, the condenser group 13 includes a first condenser 131, a second condenser 132, and a third condenser 133. The water inlet of the first condenser 131 is connected to the water distributor 12 by a first branch pipeline. The water inlet of the second condenser 132 is connected to the water distributor 12 by a second branch pipeline. The water inlet of the third condenser 133 is connected to the water distributor 12 by a third branch pipeline. The water outlets of the first, second, and third condensers 131, 132, and 133 are all connected to the drain pipe 14 by vertical pipelines.

[0027] Specifically, the first end of the shaft coupling 23 is sleeved with the end of the rotating shaft of the impeller device 21, and the second end is sleeved with the first end of the input shaft of the generator 22, and is fixed by a set screw.

[0028] Specifically, the control module 40 comprises a PLC controller 41 and a liquid level sensor 42; the liquid level sensor 42 is installed on the inner wall of the recovery water tank 15 and connected with the input end of the PLC controller 41 through a cable; the output end of the PLC controller 41 is connected with the driving motor circuit of the water supply pump 11.

[0029] Specifically, the cooling water circulation module 10 further comprises a backwater pump 16, a filter 17, a cooling tower 18 and a water storage tank 19; the water inlet of the backwater pump 16 is connected with the bottom of the recovery water tank 15 through a pipeline, and the water outlet is connected with the water inlet of the filter 17; the water outlet of the filter 17 is connected with the water inlet of the cooling tower 18; the water outlet of the cooling tower 18 is connected with the water storage tank 19; the water inlet of the water supply pump 11 is connected with the bottom of the water storage tank 19 through a pipeline.

[0030] Specifically, the storage power module 30 comprises a charge-discharge controller and a battery pack; the input end of the charge-discharge controller is connected with the output end of the generator 22 through a cable, and the output end of the charge-discharge controller is connected with the electrode of the battery pack.

[0031] The embodiment provides a cooling water power generation system of a water vapor vacuum pump, which is used for solving the technical problem of how to efficiently capture and convert the gravitational potential energy of cooling water in the drainage process, so as to realize energy saving and environmental protection and operation cost optimization.

[0032] As shown in Figure 1 , Figure 2 and Figure 3 , the system comprises a cooling water circulation module 10, a potential energy power generation module 20, a storage power module 30 and a control module 40.

[0033] When the power generation system is implemented, it specifically comprises: I. Specific connection and function of the cooling water circulation module 10 The cooling water circulation module 10 comprises a water supply pump 11, a water distributor 12, a condenser group 13, a drain pipe 14 and a recovery water tank 15 which are sequentially connected through pipelines.

[0034] The water inlet of the water supply pump 11 is connected with the bottom of the water storage tank 19 through a pipeline. The water supply pump 11 is used for pumping cooling water into the water distributor 12.

[0035] The inlet pipeline of the water distributor 12 is provided with an inlet valve and a pressure detection device, and the outlet is connected with the condenser group 13 through multiple branch pipelines. The water distributor 12 is used for distributing cooling water to each stage of the condenser group 13. The outlet pipeline of the water distributor 12 is provided with an outlet valve and a temperature detection device for adjusting and monitoring the state of the distributed cooling water.

[0036] The condenser group 13 includes a first condenser 131, a second condenser 132 and a third condenser 133. The water inlet of the first condenser 131 is connected to the water distributor 12 through a first branch pipe, the water inlet of the second condenser 132 is connected to the water distributor 12 through a second branch pipe, and the water inlet of the third condenser 133 is connected to the water distributor 12 through a third branch pipe. Each stage condenser is used to exchange heat between the cooling water inside and the high-temperature steam discharged by the vacuum pump, so as to condense the steam, which can effectively reduce the working load of the vacuum pump in the later stage.

[0037] The water outlets of the first condenser 131, the second condenser 132 and the third condenser 133 are all connected to the drain pipe 14 through vertical pipes. The drain pipe 14 is vertically arranged between the water outlets of the condenser group 13 and the recovery water pool 15, and has a vertical height of 10 meters, which is used to form a water flow channel with a significant gravity potential energy difference.

[0038] The cooling water circulation module 10 further includes a backwater pump 16, a filter 17, a cooling tower 18 and a storage pool 19. The recovery water pool 15 is used to collect the cooling water after heat exchange. The water inlet of the backwater pump 16 is connected to the bottom of the recovery water pool 15 through a pipe, and the water outlet is connected to the water inlet of the filter 17. The backwater pump 16 is used to pump the water in the recovery water pool 15. The water outlet of the filter 17 is connected to the water inlet of the cooling tower 18, and the filter 17 is used to filter the impurities in the cooling water. The water outlet of the cooling tower 18 is connected to the storage pool 19, and the cooling tower 18 is used to reduce the temperature of the cooling water. The water inlet of the water supply pump 11 is connected to the bottom of the storage pool 19 through a pipe, so as to form a complete cooling water circulation loop, realize the reuse of water resources, and reduce the operation cost.

[0039] II. Specific connection and function of the potential energy power generation module 20 The potential energy power generation module 20 includes an impeller device 21, a generator 22 and a coupling 23.

[0040] The water inlet of the impeller device 21 is connected to the outlet end of the drain pipe 14 through a flange. The cooling water flowing out of the outlet end of the drain pipe 14 forms a gravity water flow, which directly impacts the blades of the impeller device 21, and is used to convert the gravity potential energy of the water flow into mechanical energy of the rotation of the impeller.

[0041] The first end of the coupling 23 is sleeved with the end of the rotating shaft of the impeller device 21, the second end is sleeved with the head of the input shaft of the generator 22, and is fixed through a locking screw. The coupling 23 is used to synchronously and coaxially transmit the mechanical rotation of the impeller device 21 to the generator 22, so as to ensure the efficiency and stability of energy transmission.

[0042] The generator 22 is a permanent magnet synchronous generator, which is used to convert the input mechanical energy into electrical energy through electromagnetic induction principle.

[0043] III. The specific connection and function of the storage power module 30 The storage power module 30 is connected to the output end of the generator 22 through a cable.

[0044] The storage power module 30 includes a charge-discharge controller and a battery pack. The input end of the charge-discharge controller is connected to the output end of the generator 22 through a cable, and the output end of the charge-discharge controller is connected to the electrode of the battery pack. The charge-discharge controller is used to manage the electric energy generated by the generator 22 and intelligently charge the battery pack. The storage power module 30 is used to store electric energy and can discharge power to other power-consuming devices in the plant power grid, thereby significantly reducing the electric energy obtained from the external power grid, and realizing operation cost optimization.

[0045] IV. The specific connection and function of the control module 40 The control module 40 is connected to the drive motor of the water supply pump 11 and the control end of the generator 22 through a cable.

[0046] The control module 40 includes a PLC controller 41 and a liquid level sensor 42. The liquid level sensor 42 is installed on the inner wall of the recovered water tank 15 and is connected to the input end of the PLC controller 41 through a cable. The liquid level sensor 42 is used to monitor the liquid level data of the recovered water tank 15 in real time. The output end of the PLC controller 41 is connected to the drive motor circuit of the water supply pump 11.

[0047] The control module 40 is used to automatically start and stop the water supply pump 11 according to the liquid level data of the recovered water tank 15 monitored by the liquid level sensor 42, so as to accurately maintain the balance between the cooling water circulation amount and the power generation demand, and ensure the stable and efficient operation of the system. The automation control further reduces the demand for manual operation and the energy consumption of the system.

[0048] V. System operation process and effect When the system is implemented, the cooling water circulates in the cooling water circulation module 10. After flowing through the condenser group 13 to complete the condensation task, the high-temperature cooling water becomes low-temperature cooling water and falls through the vertical drain pipe 14. In this process, the gravitational potential energy carried by the cooling water is captured by the potential energy power generation module 20 and converted into electric energy stored in the storage power module 30. The control module 40 ensures the continuity and stability of the process through automatic regulation and control.

[0049] The embodiment provides a water vapor vacuum pump cooling water power generation system. The system directly converts the gravitational potential energy of the cooling water into electric energy through an integrated power generation device and stores the electric energy. The system significantly reduces the comprehensive energy consumption of the vacuum pump system itself, realizes the technical effects of energy saving and environmental protection, and optimizes the operation cost.

[0050] Figure 4The flow chart of the water vapor vacuum pump cooling water power generation method provided in the present application is shown in the figure, and the water vapor vacuum pump cooling water power generation method is described in detail as follows: Figure 2 The water vapor vacuum pump cooling water power generation method provided in the present embodiment comprises the following steps: S1: water storage starting step: when the liquid level of the water storage tank 19 reaches the first set value, the water supply pump 11 is started by the control module 40, and the inlet valve and the outlet valve of the water distributor 12 are opened synchronously; S2: cooling water distribution step: the cooling water is pumped into the water distributor 12 by the water supply pump 11, and flows into each stage of the condenser group 13 through the branch pipes of the water distributor 12 respectively; S3: power generation triggering step: the cooling water flowing through the condenser group 13 absorbs the heat of the high-temperature steam, and is discharged through the vertically arranged drain pipe 14, the gravity water flow impacts the impeller device 21 of the gravity water flow impact potential energy power generation module 20, the impeller device 21 rotates and drives the generator 22 to generate electricity through the shaft coupling 23; S4: electric energy storage step: the electric energy generated by the generator 22 is transmitted to the storage electric module 30 for storage through the cable; S5: circulation control step: when the liquid level of the recovered water tank 15 reaches the second set value, the water return pump 16 is started by the control module 40, and the cooling water returns to the water storage tank 19 after flowing through the filter 17 and the cooling tower 18 in turn.

[0051] Specifically, in the S1 water storage starting step, the PLC controller 41 of the control module 40 monitors the liquid level sensor data of the water storage tank 19 in real time, and automatically triggers the water supply pump 11 starting instruction when the liquid level exceeds the first set value.

[0052] Specifically, after the S5 circulation control step, the method further comprises the following steps: S6: shutdown control step: when the system needs to stop running, the water supply pump 11 is first closed by the control module 40, the water return pump 16 is closed after the liquid level of the recovered water tank 15 is stable, the cable connection between the generator 22 and the storage electric module 30 is disconnected, and the filter 17 and the cooling tower 18 are closed synchronously.

[0053] The present embodiment provides a water vapor vacuum pump cooling water power generation method, which is automatically operated by the control module 40, and specifically comprises the following steps: 1. Water storage starting step (S1) When the liquid level sensor of the water storage tank 19 detects that the liquid level reaches the first set value (for example, 2.5 meters): The PLC controller 41 of the control module 40 automatically starts the water supply pump 11; The inlet valve (installed at the outlet end of the water supply pump 11) and the outlet valve (connected to the branch pipe) of the water distributor 12 are opened synchronously; By adjusting the opening of the water distributor 12 outlet valve (such as the first condenser 131 corresponding valve opening 60%, the second condenser 132 opening 30%, the third condenser 133 opening 40%), and the frequency converter of the water supply pump 11 to adjust the motor frequency to 45Hz, the cooling water flow is controlled to be 1000m³ / h.

[0054] Function: Ensure that the cooling water is distributed to each level of condenser as needed, avoiding flow fluctuations affecting the condensing efficiency of the vacuum pump.

[0055] 2. Cooling water distribution step (S2) The cooling water is pumped into the water distributor 12 after being pressurized by the water supply pump 11: Through the first branch pipe (pipe diameter DN150) into the first condenser 131; Through the second branch pipe (pipe diameter DN120) into the second condenser 132; Through the third branch pipe (pipe diameter DN120) into the third condenser 133; Heat exchange process: The cooling water is in contact with 150-180℃ high temperature steam in the condenser (temperature difference >70℃), which makes the steam condense into liquid water, while the cooling water temperature rises to 40-70℃.

[0056] 3. Power generation triggering step (S3) The heat-absorbed cooling water is discharged through the vertically arranged drain pipe 14 (height 10 meters), forming a gravity water flow (flow rate 5m / s); The water flow impacts the impeller device 21 (blade inclination angle 35°) of the water flow impact potential energy power generation module 20, driving the impeller to rotate at a speed of 1200rpm; The rotating shaft of the impeller device 21 coaxially drives the generator 22 (permanent magnet synchronous motor) to rotate and generate electricity through the coupling 23 (elastic sleeve pin type).

[0057] 4. Electric energy storage step (S4) The 12kW alternating current generated by the generator 22 is transmitted to the storage module 30 through the cable; The charge and discharge controller stores the electric energy in the battery pack (200Ah lead-acid battery); When the lighting equipment in the factory area needs electricity, 220V / 50Hz alternating current is output through the inverter for power supply.

[0058] 5. Circulation control step (S5) When the water level sensor 42 of the recovered water tank 15 detects that the water level rises to the second set value (for example 2.8 meters): The PLC controller 41 automatically starts the backwater pump 16 (frequency 35Hz); The cooling water flows through the filter 17 (stainless steel filter screen, precision 50μm) in turn to remove impurities; Cooling tower 18 (counter flow) reduces water temperature from 50℃ to 35℃ (temperature difference 15℃); The treated cooling water returns to the water storage tank 19, forming a closed loop.

[0059] 6. Shutdown control step (S6) When the system needs to be shut down: PLC controller 41 first closes the water supply pump 11; After the recovery tank 15 liquid level is stable at 1.2 meters (liquid level sensor 42 continues for 30 seconds fluctuation <0.1 meters); Close the return water pump 16, the filter 17 inlet valve and cooling tower 18 fan are closed synchronously; Disconnect the power cable 22 and the storage module 30 to prevent current backwash damage to the equipment.

[0060] Those of ordinary skill in the art will understand that all or some of the steps in the method disclosed above, the functions of the modules / units in the system, device can be implemented as software, firmware, hardware and appropriate combinations thereof.

[0061] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the application be construed as including any variations, uses or adaptations of the application following in general the principles of the application and including such as come within the scope of the following claims and their equivalents. The specification and examples are to be regarded as exemplary only.

[0062] It should be understood that the application is not limited to the precise construction that has been described above and illustrated in the accompanying drawings and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application.

Claims

1. A steam vacuum pump cooling water power generation system, characterized in that, include: Cooling water circulation module (10), potential energy power generation module (20), electricity storage module (30), control module (40); The cooling water circulation module (10) includes a water supply pump (11), a water distributor (12), a condenser group (13), a drain pipe (14), and a recovery water tank (15) connected in sequence by pipes. The potential energy power generation module (20) includes an impeller device (21), a generator (22) and a coupling (23). The inlet of the impeller device (21) is vertically connected to the outlet end of the drain pipe (14) through a flange. The rotating shaft of the impeller device (21) is coaxially connected to the input shaft of the generator (22) through the coupling (23). The power storage module (30) is connected to the output end of the generator (22) via a cable; The control module (40) is connected to the drive motor of the water supply pump (11) and the control terminal of the generator (22) via a cable; The water supply pump (11) is connected to a water storage tank via a pipe to pump cooling water into a water distributor (12); the water distributor (12) is connected to a condenser group (13) via branch pipes to distribute cooling water to each stage of the condenser group (13); the condenser group (13) condenses the steam by exchanging heat between the cooling water and the high-temperature steam discharged from the vacuum pump; the drain pipe (14) is vertically installed between the outlet of the condenser group (13) and the recovery water tank (15) to form a water flow channel with a gravitational potential energy difference; the impeller device (21) The potential energy is converted into the mechanical energy of the impeller rotation by the impact of the gravity water flow; the coupling (23) connects the impeller device (21) shaft and the generator (22) input shaft coaxially to transmit the mechanical rotation synchronously to the generator (22); the generator (22) converts the mechanical energy into electrical energy through electromagnetic induction; the power storage module (30) is used to store electrical energy and supply it to the power grid equipment; the control module (40) is used to automatically start and stop the water supply pump (11) according to the liquid level data of the recycling pool (15) to maintain the balance between cooling water circulation and power generation.

2. The system as described in claim 1, characterized in that: The condenser group (13) includes a first condenser (131), a second condenser (132) and a third condenser (133). The inlet of the first condenser (131) is connected to the water distributor (12) through a first branch pipe. The inlet of the second condenser (132) is connected to the water distributor (12) through a second branch pipe. The inlet of the third condenser (133) is connected to the water distributor (12) through a third branch pipe. The outlets of the first condenser (131), the second condenser (132) and the third condenser (133) are all connected to the drain pipe (14) through vertical pipes.

3. The system as described in claim 1, characterized in that: The first end of the coupling (23) is sleeved to the end of the impeller device (21) shaft, and the second end is sleeved to the beginning of the generator (22) input shaft and fixed by a set screw.

4. The system as described in claim 1, characterized in that: The control module (40) includes a PLC controller (41) and a liquid level sensor (42). The liquid level sensor (42) is installed on the inner wall of the recycling tank (15) and connected to the input terminal of the PLC controller (41) via a cable; The output terminal of the PLC controller (41) is connected to the drive motor circuit of the water supply pump (11).

5. The system as described in claim 1, characterized in that: The cooling water circulation module (10) also includes a return water pump (16), a filter (17), a cooling tower (18), and a water storage tank (19). The inlet of the return water pump (16) is connected to the bottom of the recycling water tank (15) through a pipe, and the outlet is connected to the inlet of the filter (17). The outlet of the filter (17) is connected to the inlet of the cooling tower (18); The outlet of the cooling tower (18) is connected to the water storage tank (19); The inlet of the water supply pump (11) is connected to the bottom of the water storage tank (19) via a pipe.

6. The system as described in claim 1, characterized in that: The power storage module (30) includes a charge / discharge controller and a battery pack; The input terminal of the charge / discharge controller is connected to the output terminal of the generator (22) via a cable, and the output terminal of the charge / discharge controller is connected to the electrodes of the battery pack.

7. A method for generating electricity using water vapor vacuum pump cooling water, wherein the method is applied to the water vapor vacuum pump cooling water power generation system according to any one of claims 1-6, characterized in that, Includes the following steps: S1 Water Storage Start-up Steps: When the water level in the water storage tank (19) reaches the first set value, the water supply pump (11) is started through the control module (40) and the inlet valve and outlet valve of the water distributor (12) are opened simultaneously. S2 Cooling water distribution steps: Cooling water is pumped into the water distributor (12) by the water supply pump (11), and flows into the condensers of the condenser group (13) through the branch pipes of the water distributor (12). S3 power generation triggering steps: After the cooling water flowing through the condenser group (13) absorbs the heat of the high temperature steam, it is discharged through the vertically set drain pipe (14). The gravity water flow impacts the impeller device (21) of the potential energy power generation module (20). The impeller device (21) rotates and drives the generator (22) to generate electricity through the coupling (23). S4 energy storage steps: The electrical energy generated by the generator (22) is transmitted to the storage module (30) via cable for storage; S5 Circulation Control Step: When the liquid level of the recovery water tank (15) reaches the second set value, the return water pump (16) is started through the control module (40), and the cooling water flows through the filter (17) and cooling tower (18) in sequence before returning to the storage tank (19).

8. The method as described in claim 7, characterized in that: In the S1 water storage start-up step, the PLC controller (41) of the control module (40) monitors the liquid level sensor data of the water storage tank (19) in real time. When the liquid level exceeds the first set value, the water supply pump (11) start command is automatically triggered.

9. The method as described in claim 7, characterized in that, Following the S5 cyclic control step, the following is also included: S6 Shutdown Control Steps: When the system needs to be stopped, the water supply pump (11) is shut down first through the control module (40), and the return water pump (16) is shut down after the liquid level of the recovery water tank (15) stabilizes. The cable connection between the generator (22) and the power storage module (30) is disconnected, and the filter (17) and cooling tower (18) are shut down simultaneously.

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