Intelligent cooling water circulation system and device for thermal power generating unit

Abstract

The invention relates to the technical field of thermal power generation, and discloses an intelligent cooling water circulation system and device for a thermal power generating unit, and the system comprises a power device which is used for providing power for circulating water so that the water can continuously flow in the system; the heat exchange device is used for replacing heat generated by the thermal power generating unit; the filtering and purifying device is used for filtering and purifying the cooling water, removing microorganisms and nutrient substances in the water and destroying the growth environment of the microorganisms, and meanwhile, a filtering plate can be conveniently disassembled and fixed; and the detection control device is used for monitoring the change among the temperature, the pressure and the flow of the circulating water at different positions in real time. The variable-frequency speed regulation unit is additionally arranged in the intelligent cooling water circulation system of the thermal power generating unit, when the thermal power generating unit is in a low-load operation state, the variable-frequency speed regulation unit can reduce the rotating speed of the water pump at the moment, the output power of the water pump can be matched with the actual cooling requirement, and energy waste of a traditional constant-speed water pump under the low load is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power generation, and in particular to an intelligent cooling water circulation system and device for a thermal power unit. Background Art

[0002] Thermal power units use fossil fuels such as coal, oil, natural gas, or biomass fuels as energy, convert chemical energy into thermal energy through combustion, and then use the thermal energy to drive the turbine to rotate, thereby driving the generator to generate electricity. The intelligent cooling water circulation system and device for thermal power units is a systematic equipment combination specially used in thermal power generation units for circulating cooling water and with intelligent control and management functions.

[0003] During the use of traditional intelligent cooling water circulation systems and devices for thermal power units, the cooling demand during the operation of the thermal power units will constantly change according to factors such as the load of the unit and ambient temperature. The water pump can usually only run at a fixed speed and cannot adjust the flow and power in real time according to the actual cooling demand. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an intelligent cooling water circulation system and device for a thermal power unit, which solves the problem that a water pump can usually only run at a fixed speed and cannot adjust the flow rate and power in real time according to actual cooling needs.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an intelligent cooling water circulation system and device for a thermal power unit, comprising: Power device: used to provide power for circulating water so that water can flow continuously in the system; Heat exchange device: used to replace the heat generated by the thermal power unit; Filtration and purification device: used to filter and purify cooling water, remove microorganisms and their nutrients in the water, destroy the growth environment of microorganisms, and can easily remove and fix the filter plate; Pipeline valve device: used to prevent circulating water from flowing back when the system stops running, protecting the safety of equipment and pipelines; Detection and control device: real-time monitoring of changes in temperature, pressure and flow of circulating water at different locations.

[0006] Preferably, the power device includes a circulating water pump unit and a variable frequency speed regulation unit; The circulating water pump unit provides pressure to the water through the circulating water pump unit to ensure that the circulating water circulates normally in the thermal power unit; The variable frequency speed regulating unit can accurately adjust the rotation speed of the water pump and the fan according to the real-time load condition of the thermal power unit, so as to match the flow rate and pressure of the cooling water therewith.

[0007] Preferably, the heat exchange device comprises a condenser unit and a cooling tower unit; The condenser unit is used to condense the steam discharged from the steam turbine into water after being cooled to form condensed water. During this process, circulating water flows on the water side of the condenser to absorb the heat of the steam, thereby achieving heat exchange. The cooling tower unit dissipates the heat in the circulating water into the atmosphere through contact with the air, so that the circulating water is cooled.

[0008] Preferably, the pipeline valve device includes a circulating water inlet pipe unit and a circulating water return pipe unit; The circulating water inlet pipe unit is used to transport the water output by the circulating water pump to the condenser to provide a cooling water source for the condenser; The circulating water return pipe unit is used to transport the circulating water that has absorbed heat in the condenser back to the cooling tower for cooling, and then enter the next cycle after completing one cycle.

[0009] Preferably, the detection and control device includes a temperature sensor unit and a pressure sensor unit; The temperature sensor unit is used to monitor the temperature of the circulating water at different locations in real time so as to timely understand the operating status of the system; The pressure sensor unit is used to monitor the pressure changes in the circulating water system to ensure that the system operates within a normal pressure range.

[0010] Preferably, the filtering and purification device includes a shell, a left inner wall of the shell is fixedly connected to a fixed plate, a right inner wall of the shell is slidably connected to a sliding door, a lower surface of the shell is fixedly connected to a bottom plate, a stopper is fixedly connected to the interior of the shell, an upper surface of the sliding door is fixedly connected to a connecting block, an upper surface of the connecting block is fixedly connected to a mounting block, and the inner wall of the mounting block is rotatably connected to a rotating column.

[0011] Preferably, the outer wall of the rotating column is fixedly connected to a roller, the upper surface of the mounting block is fixedly connected to a connecting column, the upper outer wall of the connecting column is fixedly connected to a connecting plate, the upper surface of the connecting plate is fixedly connected to a first rack, the upper surface of the outer shell is fixedly connected to a supporting shell, the outer wall of the roller is rotatably connected to the inner wall of the supporting shell, the upper surface of the supporting shell is fixedly connected to a second supporting plate, the inner wall of the second supporting plate is rotatably connected to the mounting column, and the left outer wall of the mounting column is fixedly connected to the first gear.

[0012] Preferably, the first gear is meshedly connected to the upper surface of the first rack, the right outer wall of the mounting column is fixedly connected to the second gear, the outer wall of the second gear is meshedly connected to the second rack, the outer wall of the second rack is fixedly connected to the mounting plate, the outer wall of the mounting plate is fixedly connected to the first support plate, and the outer wall of the first support plate is slidably connected to the upper inner wall of the outer shell.

[0013] Preferably, a block is fixedly connected to the bottom end of the first support plate, a filter plate is slidably connected to the inner wall of the block, the outer wall of the filter plate is arranged on the outer wall of the block, filter holes are provided on the inner wall of the filter plate, a sliding groove is provided on the inner wall of the bottom plate, and the lower outer wall of the filter plate is slidably connected to the inner wall of the sliding groove.

[0014] Working principle: By adding a variable frequency speed regulation unit inside the power device of the intelligent cooling water circulation system of the thermal power unit, when the thermal power unit is in a low-load operation state, the required cooling water volume is reduced. At this time, the variable frequency speed regulation unit will reduce the speed of the water pump, so that the output power of the water pump can match the actual cooling demand, avoiding the energy waste of the traditional fixed-speed water pump under low load. Then, by manually opening the sliding door, the sliding door will move to the outer wall of the fixed plate, and at the same time drive the connection block to move, the movement of the connection block will drive the movement of the installation block, and at the same time the connection block fixes the sliding door, the movement of the installation block will drive the movement of the rotating column, and the movement of the rotating column will drive The movable roller rotates on the inner wall of the support shell, and drives the connecting column and the connecting plate to move at the same time. The movement of the connecting column and the connecting plate will drive the first rack to move. The first rack moves to the left and drives the first gear to rotate. The rotation of the first gear drives the mounting column to rotate. The rotation of the mounting column drives the second gear to rotate. The rotation of the second gear drives the second rack to slide. The sliding of the second rack drives the mounting plate to move. The movement of the mounting plate drives the first supporting plate to move and drives the card block to move at the same time. The movement of the card block drives the filter plate to slide on the inner wall of the sliding groove and move forward. The filter hole is used to filter water. Finally, the filter plate is manually pulled out from the inner wall of the card block and flushed, so that The staff can easily disassemble the filter plate and clean or replace the filter holes regularly. Compared with the non-detachable filter device, when the filter hole is blocked and needs maintenance, there is no need to disassemble the entire filter system in a complicated manner, which greatly shortens the maintenance time and reduces the difficulty of maintenance. The cleaned filter plate is installed on the inner wall of the card block, and then the sliding door is manually pushed to the original position. The sliding door will drive the connecting block to move, and the movement of the connecting block will drive the installation block to move. At the same time, the connecting block fixes the sliding door, and the movement of the installation block will drive the rotating column to move. The movement of the rotating column will drive the roller to rotate on the inner wall of the support shell, and at the same time drive the connecting column The movement of the connecting plate and the connecting column will drive the first rack to move. The movement of the first rack to the left will drive the first gear to rotate. The rotation of the first gear will drive the mounting column to rotate. The rotation of the mounting column will drive the second gear to rotate. The rotation of the second gear will drive the second rack to slide. The sliding of the second rack will drive the mounting plate to move. The movement of the mounting plate will drive the first support plate to move. Finally, the blocking block will drive the filter plate to be stuck on the outer wall of the block through the sliding groove, thereby ensuring that the filter plate always remains in the correct position during the entire operation process, avoiding the occurrence of filtering blind spots, continuously and stably providing high-quality filtering effects, and ensuring the cleanliness of the cooling water.

[0015] The present invention provides an intelligent cooling water circulation system and device for a thermal power unit. It has the following beneficial effects: 1. The present invention adds a variable frequency speed regulation unit to the intelligent cooling water circulation system of the thermal power unit. When the thermal power unit is in a low-load operation state, the required cooling water volume is reduced. At this time, the variable frequency speed regulation unit will reduce the speed of the water pump, so that the output power of the water pump can be matched with the actual cooling demand, thereby avoiding the energy waste of the traditional fixed speed water pump under low load.

[0016] 2. The present invention manually opens the sliding door, which drives the connecting block to slide and drives the filter plate to slide at the same time, so that the staff can easily disassemble the filter plate and regularly clean or replace the filter holes. Compared with the non-detachable filter device, when the filter hole is blocked and needs maintenance, there is no need to carry out complicated disassembly of the entire filter system, which greatly shortens the maintenance time and reduces the difficulty of maintenance.

[0017] 3. The present invention manually closes the sliding door, which drives the connecting block to slide and drives the filter plate to slide, thereby ensuring that the filter plate always remains in the correct position during the entire operation process, avoiding the occurrence of filtering blind spots, continuously and stably providing high-quality filtering effects, and ensuring the cleanliness of the cooling water. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of the intelligent cooling water circulation device for a thermal power unit of the present invention; Figure 2 This is a rear view of the intelligent cooling water circulation device for a thermal power unit of the present invention; Figure 3 It is a schematic diagram of the local structure of the housing of the present invention; Figure 4 This is a schematic diagram of the external structure of the roller of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the support shell of the present invention; Figure 6 A schematic diagram of the external structure of the mounting plate of the present invention; Figure 7 It is a schematic diagram of the internal structure of the housing of the present invention; Figure 8 The figure is a flow chart of the intelligent cooling water circulation system of the thermal power unit of the present invention.

[0019] Among them, 1. outer shell; 2. fixed plate; 3. sliding door; 4. connecting block; 5. mounting block; 6. rotating column; 7. roller; 8. connecting column; 9. connecting plate; 10. first rack; 11. supporting shell; 12. mounting column; 13. first gear; 14. second gear; 15. second rack; 16. mounting plate; 17. first supporting plate; 18. block; 19. filter plate; 20. filter hole; 21. bottom plate; 22. sliding groove; 23. stopper; 24. second supporting plate. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0021] Please see attached Figure 8 The embodiment of the present invention provides an intelligent cooling water circulation system for a thermal power unit, including: a power device: used to provide power for circulating water so that water can flow continuously in the system; a heat exchange device: used to replace the heat generated by the thermal power unit; a filtering and purification device: used to filter and purify cooling water, remove microorganisms and their nutrients in the water, destroy the growth environment of microorganisms, and can conveniently remove and fix the filter plate; a pipeline valve device: used to prevent the circulating water from flowing back when the system stops running, and protect the safety of equipment and pipelines; a detection and control device: real-time monitoring of the changes in temperature, pressure and flow of circulating water at different positions; the power device includes a circulating water pump unit and a variable frequency speed regulation unit; the circulating water pump unit provides pressure to water through the circulating water pump unit to ensure that the circulating water circulates normally in the thermal power unit; the variable frequency speed regulation unit can accurately adjust the speed of the water pump and the fan according to the real-time load of the thermal power unit to match the flow and pressure of the cooling water; the heat exchange device includes a condenser unit Yuanhe cooling tower unit; the function of the condenser unit is to condense the steam discharged from the turbine into water after being cooled to form condensed water. In this process, the circulating water flows on the water side of the condenser and absorbs the heat of the steam, thereby realizing heat exchange; the cooling tower unit dissipates the heat in the circulating water into the atmosphere through contact with the air, so that the circulating water is cooled; the pipeline valve device includes a circulating water inlet pipe unit and a circulating water return pipe unit; the circulating water inlet pipe unit is used to transport the water output by the circulating water pump to the condenser to provide a cooling water source for the condenser; the circulating water return pipe unit is used to transport the circulating water that has absorbed heat in the condenser back to the cooling tower for cooling, and enter the next cycle after completing one cycle; the detection and control device includes a temperature sensor unit and a pressure sensor unit; the temperature sensor unit is used to monitor the temperature of the circulating water at different positions in real time, so as to timely understand the operating status of the system; the pressure sensor unit is used to monitor the pressure changes in the circulating water system to ensure that the system operates within a normal pressure range; Specifically, power is provided by a power device, and a variable frequency speed regulation unit is added inside the power device. When the thermal power unit is in a low-load operation state, the required cooling water volume is reduced. At this time, the variable frequency speed regulation unit will reduce the speed of the water pump, so that the output power of the water pump can match the actual cooling demand, avoiding the energy waste of the traditional constant-speed water pump under low load. The heat inside the thermal power unit is then taken away through water circulation, and the water is then filtered and purified to remove slag. When the power unit is shut down, the check valve in the pipeline valve device plays a role to prevent the circulating water from flowing back when the system stops running. The temperature and pressure of the circulating water are then monitored by the detection and control device. If the circulating water flow rate still does not meet the requirements, the detection and control device will further analyze the cause, whether it is a water pump failure or excessive pipeline resistance, and then take corresponding measures to send out an alarm signal to notify maintenance personnel to check the water pump or adjust the opening of the pipeline valve.

[0022] Please see attached Figure 1 -Attached Figure 7 The filtering and purifying device comprises a shell 1, a fixed plate 2 is fixedly connected to the left inner wall of the shell 1, a sliding door 3 is slidably connected to the right inner wall of the shell 1, a bottom plate 21 is fixedly connected to the lower surface of the shell 1, a stopper 23 is fixedly connected to the inside of the shell 1, a connecting block 4 is fixedly connected to the upper surface of the sliding door 3, a mounting block 5 is fixedly connected to the upper surface of the connecting block 4, and a rotating column 6 is rotatably connected to the inner wall of the mounting block 5; a roller 7 is fixedly connected to the outer wall of the rotating column 6, a connecting column 8 is fixedly connected to the upper surface of the mounting block 5, a connecting plate 9 is fixedly connected to the upper outer wall of the connecting column 8, a first rack 10 is fixedly connected to the upper surface of the connecting plate 9, a supporting shell 11 is fixedly connected to the upper surface of the shell 1, the outer wall of the roller 7 is rotatably connected to the inner wall of the supporting shell 11, a second supporting plate 24 is fixedly connected to the upper surface of the supporting shell 11, and the inner wall of the second supporting plate 24 is fixedly connected to the inner wall of the second supporting plate 24. The wall is rotatably connected with a mounting column 12, and the left outer wall of the mounting column 12 is fixedly connected with a first gear 13; the first gear 13 is meshedly connected to the upper surface of the first rack 10, and the right outer wall of the mounting column 12 is fixedly connected with a second gear 14, and the outer wall of the second gear 14 is meshedly connected with a second rack 15, and the outer wall of the second rack 15 is fixedly connected with a mounting plate 16, and the outer wall of the mounting plate 16 is fixedly connected with a first support plate 17, and the outer wall of the first support plate 17 is slidably connected to the upper inner wall of the shell 1; the bottom end of the first support plate 17 is fixedly connected with a block 18, and the inner wall of the block 18 is slidably connected with a filter plate 19, and the outer wall of the filter plate 19 is arranged on the outer wall of the stopper 23, and the inner wall of the filter plate 19 is provided with a filter hole 20, and the inner wall of the bottom plate 21 is provided with a sliding groove 22, and the lower outer wall of the filter plate 19 is slidably connected to the inner wall of the sliding groove 22; Specifically, by manually opening the sliding door 3 to move, the sliding door 3 will move to the outer wall of the fixed plate 2, and at the same time drive the connecting block 4 to move, the movement of the connecting block 4 will drive the mounting block 5 to move, and at the same time the connecting block 4 fixes the sliding door 3, the movement of the mounting block 5 will drive the rotating column 6 to move, the movement of the rotating column 6 will drive the roller 7 to rotate on the inner wall of the supporting shell 11, and at the same time drive the connecting column 8 and the connecting plate 9 to move, the movement of the connecting column 8 and the connecting plate 9 will drive the first rack 10 to move, the first rack 10 moves to the left to drive the first gear 13 to rotate, the rotation of the first gear 13 drives the mounting column 12 to rotate, and the rotation of the mounting column 12 drives The second gear 14 is driven to rotate, and the rotation of the second gear 14 drives the second rack 15 to slide. The sliding of the second rack 15 drives the mounting plate 16 to move, and the movement of the mounting plate 16 drives the first support plate 17 to move, and at the same time drives the block 18 to move. The movement of the block 18 drives the filter plate 19 to slide on the inner wall of the sliding groove 22 and move forward. The filter hole 20 is used to filter water. Finally, the filter plate 19 is manually pulled out from the inner wall of the block 18 for flushing, so that the staff can easily disassemble the filter plate 19 and regularly clean or replace the filter hole 20. Compared with the non-detachable filter device, when the filter hole 20 is blocked When maintenance is needed, there is no need to carry out complicated disassembly of the entire filtration system, which greatly shortens the maintenance time and reduces the difficulty of maintenance. The cleaned filter plate 19 is installed on the inner wall of the card block 18, and then the sliding door 3 is manually pushed to the original position. The sliding door 3 will drive the connecting block 4 to move, and the movement of the connecting block 4 will drive the installation block 5 to move. At the same time, the connecting block 4 fixes the sliding door 3, and the movement of the installation block 5 will drive the rotating column 6 to move. The movement of the rotating column 6 will drive the roller 7 to rotate on the inner wall of the support shell 11, and at the same time drive the connecting column 8 and the connecting plate 9 to move. The movement of the connecting column 8 and the connecting plate 9 will drive the first rack 10 to move. The first rack 10 Movement to the left will drive the first gear 13 to rotate, the rotation of the first gear 13 drives the mounting column 12 to rotate, the rotation of the mounting column 12 drives the second gear 14 to rotate, the rotation of the second gear 14 will drive the second rack 15 to slide, the sliding of the second rack 15 drives the mounting plate 16 to move, the movement of the mounting plate 16 drives the first support plate 17 to move, and finally the block 18 drives the filter plate 19 to be stuck on the outer wall of the block 23 through the sliding groove 22, thereby ensuring that the filter plate 19 always remains in the correct position during the entire operation process, avoiding the occurrence of filtering blind spots, continuously and stably providing high-quality filtering effects, and ensuring the cleanliness of the cooling water.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Intelligent cooling water circulation system for thermal power units, characterized in that: include: Power device: used to provide power for circulating water so that water can flow continuously in the system; Heat exchange device: used to replace the heat generated by the thermal power unit; Filtration and purification device: used to filter and purify cooling water, remove microorganisms and their nutrients in the water, destroy the growth environment of microorganisms, and can easily remove and fix the filter plate; Pipeline valve device: used to prevent circulating water from flowing back when the system stops running, protecting the safety of equipment and pipelines; Detection and control device: real-time monitoring of changes in temperature, pressure and flow of circulating water at different locations.

2. The intelligent cooling water circulation system for thermal power units according to claim 1 is characterized in that: The power device includes a circulating water pump unit and a variable frequency speed regulation unit; The circulating water pump unit provides pressure to the water through the circulating water pump unit to ensure that the circulating water circulates normally in the thermal power unit; The variable frequency speed regulating unit can accurately adjust the rotation speed of the water pump and the fan according to the real-time load condition of the thermal power unit, so as to match the flow rate and pressure of the cooling water therewith.

3. The intelligent cooling water circulation system for thermal power units according to claim 1 is characterized in that: The heat exchange device includes a condenser unit and a cooling tower unit; The condenser unit is used to condense the steam discharged from the steam turbine into water after being cooled to form condensed water. During this process, circulating water flows on the water side of the condenser to absorb the heat of the steam, thereby achieving heat exchange. The cooling tower unit dissipates the heat in the circulating water into the atmosphere through contact with the air, so that the circulating water is cooled.

4. The intelligent cooling water circulation system for thermal power units according to claim 1, characterized in that: The pipeline valve device includes a circulating water inlet pipe unit and a circulating water return pipe unit; The circulating water inlet pipe unit is used to transport the water output by the circulating water pump to the condenser to provide a cooling water source for the condenser; The circulating water return pipe unit is used to transport the circulating water that has absorbed heat in the condenser back to the cooling tower for cooling, and then enter the next cycle after completing one cycle.

5. The intelligent cooling water circulation system for thermal power units according to claim 1 is characterized in that: The detection control device includes a temperature sensor unit and a pressure sensor unit; The temperature sensor unit is used to monitor the temperature of the circulating water at different locations in real time so as to timely understand the operating status of the system; The pressure sensor unit is used to monitor the pressure changes in the circulating water system to ensure that the system operates within a normal pressure range.

6. The intelligent cooling water circulation system for thermal power units according to claim 1, characterized in that: The filtering and purifying device comprises a housing (1), a fixed plate (2) is fixedly connected to the left inner wall of the housing (1), a sliding door (3) is slidably connected to the right inner wall of the housing (1), a bottom plate (21) is fixedly connected to the lower surface of the housing (1), a stopper (23) is fixedly connected to the interior of the housing (1), a connecting block (4) is fixedly connected to the upper surface of the sliding door (3), a mounting block (5) is fixedly connected to the upper surface of the connecting block (4), and a rotating column (6) is rotatably connected to the inner wall of the mounting block (5).

7. The intelligent cooling water circulation system for thermal power units according to claim 6, characterized in that: The outer wall of the rotating column (6) is fixedly connected to a roller (7), the upper surface of the mounting block (5) is fixedly connected to a connecting column (8), the upper outer wall of the connecting column (8) is fixedly connected to a connecting plate (9), the upper surface of the connecting plate (9) is fixedly connected to a first rack (10), the upper surface of the outer shell (1) is fixedly connected to a supporting shell (11), the outer wall of the roller (7) is rotatably connected to the inner wall of the supporting shell (11), the upper surface of the supporting shell (11) is fixedly connected to a second supporting plate (24), the inner wall of the second supporting plate (24) is rotatably connected to a mounting column (12), and the left outer wall of the mounting column (12) is fixedly connected to a first gear (13).

8. The intelligent cooling water circulation system for thermal power generation units according to claim 7, characterized in that: The first gear (13) is meshedly connected to the upper surface of the first rack (10); the right outer wall of the mounting column (12) is fixedly connected to the second gear (14); the outer wall of the second gear (14) is meshedly connected to the second rack (15); the outer wall of the second rack (15) is fixedly connected to the mounting plate (16); the outer wall of the mounting plate (16) is fixedly connected to the first support plate (17); and the outer wall of the first support plate (17) is slidably connected to the upper inner wall of the housing (1).

9. The intelligent cooling water circulation system for thermal power units according to claim 8, characterized in that: A clamping block (18) is fixedly connected to the bottom end of the first support plate (17); a filter plate (19) is slidably connected to the inner wall of the clamping block (18); an outer wall of the filter plate (19) is arranged on the outer wall of the stopper (23); a filter hole (20) is provided on the inner wall of the filter plate (19); a sliding groove (22) is provided on the inner wall of the bottom plate (21); and a lower outer wall of the filter plate (19) is slidably connected to the inner wall of the sliding groove (22).

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