A cooling water recycling treatment mechanism for steam turbine units

Abstract

A kind of cooling water recycling processing mechanism for steam turbine unit, the present application relates to steam cooling mechanism technical field;The upper side of the outer side wall of processing box is fixedly connected with inlet pipe, and inlet pipe is arranged in " V " shape, and the bottom of the outer side wall of processing box is fixedly connected with No. 1 outlet pipe and No. 2 outlet pipe on the left and right sides symmetrically;Mixing agent mechanism is arranged at the turning point of inlet pipe, and the other side of mixing agent mechanism is fixedly arranged on the top surface of processing box;Conical filter screen is fixedly arranged on the bottom surface of baffle;Deslagging tank is fixedly connected with the right side wall of processing box, and the inner bottom surface of deslagging tank is flush with the upper surface of baffle;Deslagging pipe is fixedly arranged on the bottom surface of deslagging tank;Primary filtering residue mechanism is arranged in the interior of deslagging tank;Filter screen backflushing mechanism is arranged in the interior of processing box below conical filter screen;After double filtration, cooling water can be recycled, to avoid active sludge to block the pipeline of spray cooling system.

Description

Technical Field

[0001] This invention relates to the field of turbine cooling mechanism technology, and more specifically to a cooling water recycling and treatment mechanism for turbine units. Background Technology

[0002] A steam turbine, also known as a steam engine, is a rotary steam power unit. High-temperature, high-pressure steam passes through a fixed nozzle, becomes an accelerated airflow, and is then injected onto blades, causing a rotor equipped with rows of blades to rotate and perform work. Steam turbines are the main equipment in modern thermal power plants and are also used in the metallurgical industry, chemical industry, and ship propulsion systems.

[0003] The existing method for cooling exhaust steam from steam turbines involves passing the exhaust steam into a condenser pipe, then using a spray system to spray the pipe and condense the steam into water, which is then discharged. However, the cooling water used in current technologies is generally surface water, which contains many impurities. The cooling water after exhaust steam cooling cannot be directly discharged or reused, as these impurities can affect the lifespan of the spray pipe. Therefore, there is an urgent need for a cooling water recycling and treatment mechanism for steam turbine units. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings and deficiencies of the prior art by providing a simple, rationally designed, and easy-to-use cooling water recycling and treatment mechanism for steam turbine units, which can solve the technical problems in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: it includes a processing tank, an inlet pipe, a first outlet pipe, and a second outlet pipe. The inlet pipe is fixedly connected to the upper side of the outer wall of the processing tank and is arranged in a "V" shape. The first outlet pipe and the second outlet pipe are symmetrically fixedly connected to the left and right sides of the bottom of the outer wall of the processing tank. A partition is fixedly installed in the middle of the inner side of the processing tank, and a solenoid valve is fixedly installed in the middle of the partition, and the solenoid valve is connected to an external power supply.

[0006] It also includes:

[0007] The mixing mechanism is located at the bend of the inlet pipe, and the other side of the mixing mechanism is fixedly installed on the top surface of the processing tank.

[0008] A conical filter screen is fixedly installed on the bottom surface of the partition plate and covers the outside of the solenoid valve. The lower side of the conical filter screen is open.

[0009] The slag discharge box is fixedly connected to the right side wall of the processing box, and the inner bottom surface of the slag discharge box is flush with the upper side surface of the partition; a slag discharge pipe is fixedly installed on the bottom surface of the slag discharge box.

[0010] The primary slag filtration mechanism is located inside the slag discharge box;

[0011] A filter backwashing mechanism is located inside the processing box on the lower side of the conical filter.

[0012] Through the above technical solution design, external cooling water is transported into the treatment tank through the inlet pipe. When the cooling water passes through the mixing mechanism, it can mix with the flocculant inside the mixing mechanism. The mixing mechanism can control the dosage and rate of flocculant addition. Impurities in the cooling water come into contact with, collide with, bridge, and adsorb with the flocculant, gradually forming large floc particles, which then settle in the treatment tank on the upper side of the baffle. The large floc particles on the upper side of the baffle are then filtered and discharged through the primary filtration mechanism, and discharged through the discharge pipe. The cooling water after primary filtration enters the interior of the conical filter screen through the solenoid valve for secondary filtration. After secondary filtration, it is discharged through the No. 1 drain pipe, which is connected to the external cooling water collection mechanism for convenient reuse of the cooling water. After the conical filter screen has been used for a period of time, the conical filter screen is backwashed and discharged through the filter screen backwashing mechanism. The wastewater after backwashing is discharged through the No. 2 drain pipe for subsequent centralized treatment.

[0013] As a further improvement of the present invention, the drug mixing mechanism includes:

[0014] A medicine box is fixedly installed on the top surface of the processing box, and a sealing cap is screwed onto the open end of the top surface of the medicine box by means of threads.

[0015] The upper end of the drug delivery tube is fixedly installed on the bottom surface of the medicine tank, and the lower end of the drug delivery tube is fixedly installed at the bend of the inlet tube.

[0016] The control ball is rotatably mounted at the lower end of the drug delivery tube via a rotating shaft and bearings, and the outer side wall of the control ball is fitted against the inner side wall of the drug delivery tube; the outer side wall of the control ball has several control holes with rounded corners.

[0017] The No. 1 motor is fixedly mounted on the front side wall of the inlet pipe via a motor bracket, and its output shaft is fixedly connected to the rotating shaft in the middle of the control ball; the No. 1 motor is connected to an external power source.

[0018] The above technical solution involves opening the sealing cap to add flocculant into the reagent tank, then screwing the sealing cap back on. A motor drives a control ball to rotate. Because the outer wall of the control ball is flush with the inner wall of the delivery pipe, the flocculant only enters the inlet pipe from the inside of the control hole. The dosing speed and dosage are controlled by adjusting the output shaft speed of the motor. Simultaneously, since the dosing point is located at the bend in the inlet pipe, the flow rate of the cooling water changes. This change in the water flow path and the resulting instability facilitates the mixing of flocculant and cooling water, promoting the formation of flocculent particles.

[0019] As a further improvement of the present invention, the primary filter residue mechanism includes:

[0020] The No. 1 cylinder is fixedly installed on the right side wall of the slag discharge box, and the output shaft of the No. 1 cylinder passes through the right side wall of the slag discharge box through a sealing structure and is then fixedly connected to the right side wall of the filter screen plate; the No. 1 cylinder is connected to an external air source; slag passage holes are symmetrically opened on the front and rear sides of the side wall of the filter screen plate.

[0021] Two opening and closing plates are provided, and they are respectively movably disposed inside the slag passage hole via a rotating shaft and a bearing. The opening and closing plates are limited to the side wall of the slag passage hole.

[0022] Two springs are fixedly installed on the right side wall of the opening and closing plates on the front and rear sides, respectively, and the other end of the spring is fixedly installed on the right side wall inside the slag discharge box.

[0023] Through the above technical solution design, after the flocculant is added to the cooling water and the flocculation and sedimentation occur for a period of time, the filter screen plate is pushed to the left by the cylinder. As the filter screen plate moves to the left, the spring is stretched to its limit. At this time, the opening and closing plate rotates under the tension of the spring, exposing the slag passage hole. As the filter screen plate moves to the left, the precipitated flocculent particles enter the right side of the filter screen plate. The cylinder then drives the filter screen plate to move to the right. Under the reverse compression force of the spring, the opening and closing plate blocks the slag passage hole. The flocculent particles are gradually squeezed by the filter screen plate inside the slag discharge box, and the flocculent particles gather and are finally discharged through the slag discharge pipe.

[0024] As a further improvement of the present invention, the filter backwashing mechanism includes:

[0025] A fixing cylinder is fixedly mounted on the open end of the lower side of the conical filter screen;

[0026] The sealing plate is movably disposed inside the fixed cylinder, and the surrounding walls of the sealing plate are in contact with the inner wall of the fixed cylinder.

[0027] The first electric push rod is fixedly installed inside the fixed cylinder by a mounting bracket, and the upper end of the first electric push rod is fixedly connected to the bottom of the sealing plate. The first electric push rod is connected to an external power source.

[0028] The guide ring is movably disposed at the bottom of the processing box, and the four sides of the guide ring are in contact with the inner side wall of the processing box. A telescopic tube is fixedly connected to the guide ring, and the upper end of the telescopic tube is fixedly inserted through the left side wall of the processing box.

[0029] The second electric push rod consists of two rods, which are vertically fixed on the front and rear sides of the bottom surface of the guide ring, respectively. The lower end of the second electric push rod is fixed on the inner bottom surface of the processing box. The second electric push rod is connected to an external power source.

[0030] A rotating ring is movably embedded inside a guide ring, and the rotating ring and the guide ring are connected internally. A ring-shaped rack is fixedly provided on the top surface of the rotating ring.

[0031] The second motor is fixedly mounted on the top surface of the guide ring by a motor bracket. A gear is fixedly connected to the output end of the second motor, and the gear meshes with a ring rack. The second motor is connected to an external power source.

[0032] The nozzles are multiple in number and are fixedly connected on the inner sidewall of the rotating ring with equal rounded corners.

[0033] Through the above technical solution design, during cooling water filtration, the No. 1 electric push rod drives the sealing plate to seal the open end of the conical filter screen at the bottom. At this time, the flocculent particles are filtered through the side wall of the conical filter screen. After filtration for a period of time, the conical filter screen needs to be cleaned. The No. 1 electric push rod extends, exposing the open end of the conical filter screen at the bottom. The No. 2 electric push rod drives the guide ring to rise and fall, thereby adjusting the up and down position of the nozzle. Then, the cleaning fluid is introduced through the telescopic pipe. The cleaning fluid enters the rotating ring through the guide ring and is then sprayed out through the nozzle onto the conical filter screen. The No. 2 motor rotates through the meshing of gears and a ring rack, so that the nozzle backwashes the conical filter screen from all directions. The cleaning wastewater is discharged through the fixed cylinder and the No. 2 drain pipe.

[0034] As a further improvement of the present invention, a graphite sealing ring is fixedly embedded on the side wall of the guide ring, and the upper side of the graphite sealing ring is in contact with the side wall of the rotating ring.

[0035] Through the above technical solution design, the graphite sealing ring increases the smoothness of the rotating ring's rotation, while sealing the connection between the guide ring and the rotating ring, effectively preventing the cleaning fluid from leaking out.

[0036] As a further improvement of the present invention, a liquid level sensor is fixedly installed on the side wall of the processing tank, and the probe of the liquid level sensor is located at the inner top of the processing tank; the liquid level sensor is connected to an external power supply.

[0037] The above technical solution design uses a liquid level sensor to detect the liquid level in the treatment tank on the upper side of the partition in real time, preventing overflow and backflow.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0039] 1. The mixing mechanism can control the dosing speed and dosage, and the dosing position is set at the bend of the inlet pipe. The flow rate of the cooling water changes here, and the unstable water flow caused by the change in the water flow path makes it easier for the flocculant to mix with the cooling water, which facilitates the generation of flocculent particles.

[0040] 2. After the cooling water passes through the primary sludge filtration mechanism and the conical filter screen, it can be recycled and reused to prevent active sludge from clogging the pipes of the spray cooling system.

[0041] 3. The filter backwashing mechanism adopts a structure that combines rotary flushing with up-and-down reciprocating flushing, so that the nozzles can backwash the conical filter screen from all directions, making the flushing of the conical filter screen more thorough. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the structure of the present invention.

[0044] Figure 2 This is a schematic diagram of the internal structure of the present invention.

[0045] Figure 3 yes Figure 2 Enlarged view of part A in the image.

[0046] Figure 4 This is a schematic diagram of the filter backwashing mechanism of the present invention.

[0047] Figure 5 This is a schematic diagram of the internal structure of the filter backwashing mechanism of the present invention.

[0048] Figure 6 This is a schematic diagram of the primary slag filtration mechanism of the present invention.

[0049] Figure 7 This is a schematic diagram of the drug mixing mechanism of the present invention.

[0050] Explanation of reference numerals in the attached figures:

[0051] Processing box 1, Inlet pipe 2, No. 1 outlet pipe 3, No. 2 outlet pipe 4, Baffle 5, Solenoid valve 6, Conical filter screen 7, Slag discharge box 8, Slag discharge pipe 9, Mixing mechanism 10, Chemical tank 10-1, Sealing cover 10-2, Chemical delivery pipe 10-3, Control ball 10-4, Control hole 10-5, No. 1 motor 10-6, Primary slag filtration mechanism 11, No. 1 cylinder 11-1, Filter screen plate 11-2, Slag passage hole 11-3 11-4 Opening and closing plate, 11-5 Spring, 12 Filter screen backwashing mechanism, 12-1 Fixed cylinder, 12-2 Sealing plate, 12-3 Electric push rod No. 1, 12-4 Guide ring, 12-5 Telescopic tube, 12-6 Electric push rod No. 2, 12-7 Rotating ring, 12-8 Ring rack, 12-9 Motor No. 2, Gear, 12-10 Sprayer head, 12-11 Graphite sealing ring, 13 Liquid level sensor, 14. Detailed Implementation

[0052] The invention will now be further described with reference to the accompanying drawings. Example 1

[0053] See as Figure 1-7 As shown, this embodiment includes a processing tank 1, an inlet pipe 2, a first outlet pipe 3, and a second outlet pipe 4. The inlet pipe 2 is fixedly welded to the upper side of the outer wall of the processing tank 1, and the inlet pipe 2 is arranged in a "V" shape. The first outlet pipe 3 and the second outlet pipe 4 are symmetrically fixedly welded to the left and right sides of the bottom of the outer wall of the processing tank 1. A partition 5 is fixedly welded to the middle of the inner side of the processing tank 1, and a solenoid valve 6 is fixedly installed in the middle of the partition 5. The solenoid valve 6 controls whether the upper and lower sides of the processing tank 1 are connected, and the solenoid valve 6 is connected to an external power supply. A liquid level sensor 14 is fixedly installed on the side wall of the processing tank 1 by bolts, and the probe of the liquid level sensor 14 is located at the inner top of the processing tank 1. The liquid level sensor 14 is a corrosion-resistant submersible liquid level transmitter. The liquid level sensor 14 is connected to an external power supply. The liquid level in the processing tank 1 above the partition 5 is detected in real time by the liquid level sensor 14 to prevent overflow and backflow.

[0054] It also includes:

[0055] The mixing mechanism 10 is located at the bend of the inlet pipe 2, and the other side of the mixing mechanism 10 is fixedly installed on the top surface of the processing tank 1.

[0056] The conical filter screen 7 is fixedly mounted on the bottom surface of the partition plate 5 by bolts, and the conical filter screen 7 covers the outside of the solenoid valve 6. The lower side of the conical filter screen 7 is open.

[0057] The slag discharge box 8 is fixedly connected to the right side wall of the processing box 1, and the inner bottom surface of the slag discharge box 8 is flush with the upper side surface of the partition 5; a slag discharge pipe 9 is fixedly installed on the bottom surface of the slag discharge box 8.

[0058] The primary filtration mechanism 11 is located inside the slag discharge box 8;

[0059] The filter backwashing mechanism 12 is located inside the processing box 1 on the lower side of the conical filter 7.

[0060] Through the above technical solution design, external cooling water is transported into the treatment tank 1 through the inlet pipe 2. When the cooling water passes through the mixing mechanism 10, it can mix with the flocculant in the mixing mechanism 10. The mixing mechanism 10 can control the dosage and rate of flocculant addition. Impurities in the cooling water come into contact with, collide with, bridge, and adsorb the flocculant, gradually forming large flocculent particles, which then settle in the treatment tank 1 above the partition 5. Then, the primary sludge filtration mechanism 11 filters and discharges the large flocculent particles above the partition 5, and then discharges them through the sludge discharge pipe 9. The cooling water after primary sludge filtration enters the interior of the conical filter screen 7 through the solenoid valve 6 for secondary filtration. After secondary filtration, it is discharged through the first drain pipe, which is connected to the external cooling water collection mechanism for convenient reuse of the cooling water. After the conical filter screen 7 has been used for a period of time, the backwashing mechanism 12 backwashes and discharges the sludge from the conical filter screen 7. The wastewater after backwashing is discharged through the second drain pipe for subsequent centralized treatment. Example 2

[0061] See as Figure 1-7 As shown, based on Example 1, the drug mixing mechanism 10 includes:

[0062] The medicine box 10-1 is fixedly mounted on the top surface of the treatment box 1 by bolts, and a sealing cover 10-2 is screwed onto the open end of the top surface of the medicine box 10-1 by threads.

[0063] The upper end of the drug delivery tube 10-3 is fixedly welded to the bottom surface of the medicine tank 10-1, and the lower end of the drug delivery tube 10-3 is fixedly welded to the bend of the liquid inlet tube 2.

[0064] The control ball 10-4 is rotatably mounted at the lower end of the drug delivery tube 10-3 via a rotating shaft and bearings, and the outer side wall of the control ball 10-4 is fitted against the inner side wall of the drug delivery tube 10-3. The rotating shaft is fixedly inserted through the middle of the control ball 10-4. Several control holes 10-5 are opened at the rounded corners of the outer side wall of the control ball.

[0065] Motor 10-6 is fixedly mounted on the front side wall of inlet pipe 2 by a motor bracket and bolts. The output shaft of motor 10-6 is fixedly connected to the rotating shaft in the middle of control ball 10-4. Motor 10-6 is connected to an external power source.

[0066] Through the above technical solution design, the flocculant is added into the reagent tank 10-1 by opening the sealing cover 10-2, and then the sealing cover 10-2 is screwed back on. The control ball 10-4 is rotated by the No. 1 motor 10-6. Since the outer wall of the control ball 10-4 is in contact with the inner wall of the delivery pipe 10-3, the flocculant only enters the inlet pipe 2 from the inside of the control hole 10-5. The dosing speed and dosage are controlled by controlling the output shaft speed of the No. 1 motor 10-6. At the same time, since the dosing position is set at the bend of the inlet pipe 2, the flow rate of the cooling water changes here. The unstable water flow caused by the change in the water flow path makes it easier for the flocculant and cooling water to mix, which facilitates the generation of flocculent particles. Example 3

[0067] See as Figure 1-7 As shown, based on Embodiment 1, the primary filter residue mechanism 11 includes:

[0068] Cylinder 11-1 is bolted to the right side wall of the slag discharge box 8. The output shaft of cylinder 11-1 passes through the right side wall of the slag discharge box 8 through a sealing structure and is then fixedly connected to the right side wall of the filter screen plate 11-2. Cylinder 11-1 is connected to an external air source. Slag passage holes 11-3 are symmetrically provided on the front and rear sides of the side wall of the filter screen plate 11-2.

[0069] There are two opening and closing plates 11-4, which are respectively movably arranged inside the slag passage hole 11-3 via a rotating shaft and a bearing. The opening and closing plates 11-4 are limited to the side wall of the slag passage hole 11-3.

[0070] Spring 11-5, there are two springs 11-5, and they are respectively fixed to the right side wall of the opening and closing plate 11-4 on the front and rear sides by bolts. The other end of the spring 11-5 is fixed to the right side wall inside the slag discharge box 8.

[0071] Through the above technical solution design, after the flocculant is added to the cooling water and flocculates and settles for a period of time, the filter screen plate 11-2 is pushed to the left by the cylinder. As the filter screen plate 11-2 continues to move to the left, the spring 11-5 is stretched to its limit. At this time, the opening and closing plate 11-4 rotates under the tension of the spring 11-5, so that the slag passage hole 11-3 is exposed. As the filter screen plate 11-2 continues to move to the left, the precipitated flocculent particles enter the right side of the filter screen plate 11-2. The cylinder then drives the filter screen plate 11-2 to move to the right. Under the reverse compression force of the spring 11-5, the opening and closing plate 11-4 blocks the slag passage hole 11-3. The flocculent particles are gradually squeezed by the filter screen plate 11-2 inside the slag discharge box 8, and the flocculent particles gather and are finally discharged through the slag discharge pipe 9. Example 4

[0072] See as Figure 1-7 As shown, based on Embodiment 3, the filter backwashing mechanism 12 includes:

[0073] The fixing cylinder 12-1 is fixedly mounted on the open end of the lower side of the conical filter screen 7 by bolts;

[0074] The sealing plate 12-2 is movably disposed inside the fixed cylinder 12-1, and the surrounding walls of the sealing plate 12-2 are in contact with the inner wall of the fixed cylinder 12-1.

[0075] The first electric push rod 12-3 is fixedly installed inside the fixed cylinder 12-1 by a mounting bracket and bolts, and the upper end of the first electric push rod 12-3 is fixedly connected to the bottom of the sealing plate 12-2. The first electric push rod 12-3 is connected to an external power source.

[0076] Guide ring 12-4 is movably disposed at the bottom of the processing box 1, and the four sides of the guide ring 12-4 are in contact with the inner side wall of the processing box 1. A telescopic tube 12-5 is fixedly connected to the guide ring 12-4. The upper end of the telescopic tube 12-5 is fixedly inserted into the left side wall of the processing box 1. The telescopic tube 12-5 is a corrugated flexible tube.

[0077] Two electric push rods 12-6 are provided, and are respectively fixed vertically on the front and rear sides of the bottom surface of the guide ring 12-4 by bolts. The lower end of the electric push rod 12-6 is fixed on the inner bottom surface of the processing box 1. The electric push rod 12-6 is connected to an external power source.

[0078] A rotating ring 12-7 is movably embedded inside the guide ring 12-4, and the rotating ring 12-7 is connected to the interior of the guide ring 12-4. A ring-shaped rack 12-8 is fixedly mounted on the top surface of the rotating ring 12-7 by bolts. A graphite sealing ring 13 is fixedly embedded on the side wall of the guide ring 12-4 by bolts, and the upper side of the graphite sealing ring 13 is in contact with the side wall of the rotating ring 12-7. The graphite sealing ring 13 increases the smoothness of the rotation of the rotating ring 12-7, and can seal the connection between the guide ring 12-4 and the rotating ring 12-7, effectively preventing the cleaning fluid from leaking out.

[0079] The second motor 12-9 is fixedly mounted on the top surface of the guide ring 12-4 by a motor bracket and bolts. A gear 12-10 is fixedly connected to the output end of the second motor 12-9, and the gear 12-10 meshes with the ring rack 12-8. The second motor 12-9 is connected to an external power source.

[0080] Spray nozzles 12-11, there are several spray nozzles 12-11, and they are respectively fixed and connected to the inner side wall of the rotating ring 12-7 by bolts or other rounded corners.

[0081] Through the above technical solution design, during cooling water filtration, the first electric push rod 12-3 drives the sealing plate 12-2 to seal the opening end of the lower side of the conical filter screen 7. At this time, the flocculated particles are filtered through the side wall of the conical filter screen 7. After filtration for a period of time, the conical filter screen 7 needs to be cleaned. The first electric push rod 12-3 extends, exposing the opening end of the lower side of the conical filter screen 7. The second electric push rod 12-6 drives the guide ring 12-4 to rise and fall, thereby adjusting the spray nozzle 12. The vertical position of -11 is adjusted, and then the cleaning fluid is introduced through the telescopic pipe 12-5. The cleaning fluid enters the rotating ring 12-7 through the guide ring 12-4, and then is sprayed out through the nozzle 12-11 onto the conical filter screen 7. The second motor 12-9 rotates through the meshing of the gear 12-10 and the ring rack 12-8, so that the nozzle 12-11 backwashes the conical filter screen 7 in all directions. The cleaning wastewater is discharged through the fixed cylinder 12-1 and the second drain pipe.

[0082] The specific models of electric actuator 12-3, electric actuator 12-6, motor 10-6, and motor 12-9 are purchased and installed directly from the market according to the usage requirements.

[0083] When using this invention, external cooling water is supplied to the interior of the treatment tank 1 through the inlet pipe 2. The sealing cover 10-2 is opened to add flocculant into the reagent tank 10-1, and then the sealing cover 10-2 is screwed back on. The control ball 10-4 is rotated by the first motor 10-6. Since the outer wall of the control ball 10-4 is in contact with the inner wall of the delivery pipe 10-3, the flocculant only enters the interior of the inlet pipe 2 from the inside of the control hole 10-5. The dosing speed and dosage are controlled by controlling the output shaft speed of the first motor 10-6. At the same time, since the dosing position is set at the bend of the inlet pipe 2, the flow rate of the cooling water changes here. The unstable water flow caused by the change in the water flow path makes it easier for the flocculant and cooling water to mix, which facilitates the generation of flocculent particles.

[0084] Impurities in the cooling water come into contact with, collide with, bridge, and adsorb onto the flocculant, gradually forming large flocculent particles, which then settle in the treatment tank 1 above the partition 5. After the flocculant has been added to the cooling water for a period of time for flocculation and sedimentation, the filter screen 11-2 is pushed to the left by a cylinder. As the filter screen 11-2 continues to move to the left, the spring 11-5 is stretched to its limit. At this time, the opening and closing plate 11-4 rotates under the tension of the spring 11-5, exposing the slag passage 11-3. As the filter screen 11-2 continues to move to the left, the settled flocculent particles enter the filter screen 11-2. -2 on the right side; the cylinder then drives the filter screen plate 11-2 to move to the right, and under the reverse compression force of the spring 11-5, the opening and closing plate 11-4 blocks the slag passage hole 11-3. The flocculated particles are gradually squeezed by the filter screen plate 11-2 inside the slag discharge box 8, and the flocculated particles gather and are finally discharged through the slag discharge pipe 9; the cooling water after primary slag filtration enters the interior of the conical filter screen 7 through the solenoid valve 6 for secondary filtration. After secondary filtration, it is discharged through the first drain pipe. The first drain pipe is connected to the external cooling water collection mechanism for convenient reuse of cooling water;

[0085] After the conical filter 7 has been used for a period of time, the first electric push rod 12-3 extends, exposing the open end of the lower side of the conical filter 7. The second electric push rod 12-6 drives the guide ring 12-4 to rise and fall, thereby adjusting the up and down position of the nozzle 12-11. Then, the cleaning fluid is introduced through the telescopic pipe 12-5. The cleaning fluid enters the rotating ring 12-7 through the guide ring 12-4, and then sprays out through the nozzle 12-11 onto the conical filter 7. The second motor 12-9 rotates through the meshing of the gear 12-10 and the ring rack 12-8, so that the nozzle 12-11 backwashes the conical filter 7 from all directions. The cleaning wastewater is discharged through the fixed cylinder 12-1 and the second drain pipe for subsequent centralized treatment.

[0086] The beneficial effects of this specific embodiment after adopting the above structure are as follows:

[0087] 1. The mixing mechanism 10 can control the dosing speed and dosage, and the dosing position is set at the bend of the inlet pipe 2. The flow rate of the cooling water changes here, and the unstable water flow caused by the change in the water flow path makes it easier for the flocculant to mix with the cooling water, which facilitates the generation of flocculent particles.

[0088] 2. After the cooling water passes through the primary sludge filtration mechanism 11 and the conical filter screen 7, it can be recycled and reused to prevent active sludge from clogging the pipes of the spray cooling system.

[0089] 3. The filter backwashing mechanism 12 adopts a structure that combines rotary flushing with up-and-down reciprocating flushing, so that the nozzles 12-11 can backwash the conical filter 7 from all directions, making the flushing of the conical filter 7 more thorough.

[0090] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A cooling water recycling and treatment mechanism for a steam turbine unit, characterized in that: It includes a processing tank (1), an inlet pipe (2), a first outlet pipe (3) and a second outlet pipe (4). The inlet pipe (2) is fixedly connected to the upper side of the outer wall of the processing tank (1), and the inlet pipe (2) is arranged in a "V" shape. The first outlet pipe (3) and the second outlet pipe (4) are symmetrically fixedly connected to the left and right sides of the bottom of the outer wall of the processing tank (1). A partition (5) is fixedly installed in the middle of the inner side of the processing tank (1), and a solenoid valve (6) is fixedly installed in the middle of the partition (5), and the solenoid valve (6) is connected to an external power supply. It also includes: The mixing mechanism (10) is located at the bend of the inlet pipe (2), and the other side of the mixing mechanism (10) is fixedly located on the top surface of the processing box (1). Conical filter (7), the conical filter (7) is fixedly installed on the bottom surface of the partition (5), and the conical filter (7) covers the outside of the solenoid valve (6), and the lower side of the conical filter (7) is open; The slag discharge box (8) is fixedly connected to the right side wall of the processing box (1), and the inner bottom surface of the slag discharge box (8) is flush with the upper side surface of the partition (5); a slag discharge pipe (9) is fixedly installed on the bottom surface of the slag discharge box (8). The primary slag filtration mechanism (11) is located inside the slag discharge box (8); The filter backwashing mechanism (12) is located inside the processing box (1) on the lower side of the conical filter (7); The drug mixing mechanism (10) includes: The medicine box (10-1) is fixedly installed on the top surface of the processing box (1), and a sealing cap (10-2) is screwed onto the open end of the top surface of the medicine box (10-1) by thread. The upper end of the drug delivery tube (10-3) is fixedly installed on the bottom surface of the medicine tank (10-1), and the lower end of the drug delivery tube (10-3) is fixedly installed at the turning point of the liquid inlet tube (2). The control ball (10-4) is rotatably mounted at the lower end of the drug delivery tube (10-3) via a rotating shaft and bearing, and the outer side wall of the control ball (10-4) is fitted against the inner side wall of the drug delivery tube (10-3); the outer side wall of the control ball (10-4) has several control holes (10-5) with rounded corners. The No. 1 motor (10-6) is fixedly mounted on the front side wall of the liquid inlet pipe (2) by a motor bracket. The output shaft of the No. 1 motor (10-6) is fixedly connected to the rotating shaft in the middle of the control ball (10-4). The No. 1 motor (10-6) is connected to an external power source. The primary filtration mechanism (11) includes: The first cylinder (11-1) is fixedly installed on the right side wall of the slag discharge box (8), and the output shaft of the first cylinder (11-1) passes through the right side wall of the slag discharge box (8) through a sealing structure and is then fixedly connected to the right side wall of the filter screen plate (11-2); the first cylinder (11-1) is connected to an external air source; slag passage holes (11-3) are symmetrically opened on the front and rear sides of the side wall of the filter screen plate (11-2). Two opening and closing plates (11-4) are provided, and are respectively movably disposed inside the slag passage hole (11-3) by means of a rotating shaft and a bearing. The opening and closing plates (11-4) are limited to the side wall of the slag passage hole (11-3). Two springs (11-5) are fixedly installed on the right side wall of the opening and closing plates (11-4) on the front and rear sides respectively, and the other end of the spring (11-5) is fixedly installed on the right side wall inside the slag discharge box (8).

2. The cooling water recycling and treatment mechanism for a steam turbine unit according to claim 1, characterized in that: The filter backwashing mechanism (12) includes: A fixed cylinder (12-1) is fixedly installed on the open end of the lower side of the conical filter screen (7); The sealing plate (12-2) is movably disposed inside the fixed cylinder (12-1), and the surrounding walls of the sealing plate (12-2) are in contact with the inner wall of the fixed cylinder (12-1). The first electric push rod (12-3) is fixedly installed inside the fixed cylinder (12-1) by a mounting bracket, and the upper end of the first electric push rod (12-3) is fixedly connected to the bottom of the sealing plate (12-2). The first electric push rod (12-3) is connected to an external power source. The guide ring (12-4) is movably disposed at the bottom of the processing box (1), and the four sides of the guide ring (12-4) are in contact with the inner side wall of the processing box (1). A telescopic tube (12-5) is fixedly connected to the guide ring (12-4), and the upper end of the telescopic tube (12-5) is fixedly inserted through the left side wall of the processing box (1). Two electric push rods (12-6) are provided, and are respectively vertically fixed on the front and rear sides of the bottom surface of the guide ring (12-4). The lower end of the electric push rod (12-6) is fixed on the inner bottom surface of the processing box (1). The electric push rod (12-6) is connected to an external power source. A rotating ring (12-7) is movably embedded inside a guide ring (12-4), and the rotating ring (12-7) and the guide ring (12-4) are connected internally. A ring rack (12-8) is fixedly provided on the top surface of the rotating ring (12-7). The second motor (12-9) is fixedly mounted on the top surface of the guide ring (12-4) via a motor bracket. A gear (12-10) is fixedly connected to the output end of the second motor (12-9), and the gear (12-10) meshes with the ring rack (12-8). The second motor (12-9) is connected to an external power source. The nozzles (12-11) are several in number and are fixedly connected on the inner side wall of the rotating ring (12-7) with equal rounded corners.

3. The cooling water recycling and treatment mechanism for a steam turbine unit according to claim 2, characterized in that: A graphite sealing ring (13) is fixedly embedded on the side wall of the guide ring (12-4), and the upper side of the graphite sealing ring (13) is in contact with the side wall of the rotating ring (12-7).

4. The cooling water recycling and treatment mechanism for a steam turbine unit according to claim 1, characterized in that: A liquid level sensor (14) is fixedly installed on the side wall of the processing tank (1), and the probe of the liquid level sensor (14) is located at the top inside the processing tank (1); the liquid level sensor (14) is connected to an external power source.

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