A circulating cooling water purifying device

Abstract

The utility model relates to a kind of circulating cooling water purification devices, including jar body, filter material being arranged in jar body, the lower part in jar body is equipped with mesh plate, filter cap is arrayed on mesh plate, the top of jar body is equipped with inlet pipe, inlet valve is equipped on inlet pipe, the bottom of jar body is equipped with outlet pipe, outlet valve, backwash valve are respectively connected on outlet pipe, the upper portion of jar body inner wall is equipped with the collecting tank of annular structure, collecting tank is spaced apart and is equipped with blow-off hole, the outer wall of jar body is equipped with blow-off pipe being communicated with collecting tank, blow-off valve is equipped on blow-off pipe, by setting the collecting tank of annular structure on the upper portion of jar body inner wall and spacing apart and being equipped with blow-off hole, when backwash, the impurities being stripped can be made from jar body periphery even fast into collecting tank and discharge through blow-off pipe, effectively avoid that impurities locally accumulate and cleaning dead angle in jar body, backwash time is shortened, and backwash water consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically to a circulating cooling water purification device. Background Technology

[0002] Waste-to-energy incineration is a core method for reducing, harmlessly treating, and recycling municipal solid waste. The stable operation of its core equipment (boilers, turbines, heat exchangers, etc.) directly depends on the cooling effect of the circulating cooling water system. Because waste incineration produces large amounts of fly ash, flue gas condensate, soluble salts, and microbial slime, these pollutants easily enter the circulating cooling water system, resulting in high concentrations and complex compositions of suspended particulate matter in the water. If not purified in time, this can cause pipe blockages, equipment scaling and corrosion, and in severe cases, shutdown for maintenance, affecting power generation efficiency and equipment lifespan. Therefore, circulating cooling water purification devices are an indispensable and critical auxiliary equipment for waste-to-energy incineration plants.

[0003] Existing circulating cooling water filtration devices mostly adopt a tank structure, with filter media, mesh plates, and filter caps inside. Water purification is achieved through the physical interception and adsorption of the filter media, and a backwashing function is also provided to restore the filtration performance of the media. However, in most existing filtration devices, wastewater is usually discharged directly through a drain pipe during backwashing. When the backwash water flow peels off impurities attached to the surface of the filter media and carries them upwards, these impurities easily accumulate locally inside the tank, creating cleaning dead zones. Some impurities are difficult to remove quickly, which not only prolongs backwashing time and increases backwashing water consumption, but may also cause secondary contamination of the filter media due to residual impurities, affecting the regeneration effect of the filter media and subsequent filtration efficiency. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a circulating cooling water purification device.

[0005] The objective of this utility model can be achieved through the following technical solution: A circulating cooling water purification device includes a tank body and filter media disposed within the tank body. A perforated plate is provided at the lower part of the tank body, and filter caps are arranged in an array on the perforated plate. A water inlet pipe is provided at the top of the tank body, and a water inlet valve is provided on the water inlet pipe. A water outlet pipe is provided at the bottom of the tank body, and a water outlet valve and a backwash valve are respectively connected to the water outlet pipe. A collection trough with an annular structure is provided at the upper part of the inner wall of the tank body, and a drain hole is provided at intervals on the collection trough. A drain pipe communicating with the collection trough is provided on the outer wall of the tank body, and a drain valve is provided on the drain pipe.

[0006] Preferably, the tank is equipped with a water distribution device, which is connected to the water inlet pipe.

[0007] Preferably, the water distribution device includes a connecting pipe connected to the water inlet pipe, and the connecting pipe is provided with water distribution branch pipes at circumferential intervals, with water distribution holes evenly distributed on the water distribution branch pipes.

[0008] Preferably, an arc-shaped baffle is provided inside the tank at the position corresponding to the water outlet pipe, and the arc-shaped baffle is fixedly connected to the inner wall of the tank by a support column.

[0009] Preferably, the bottom of the tank is provided with an air inlet pipe, the air inlet pipe is provided with an air inlet valve, the tank is provided with an air distribution device connected to the air inlet pipe, and the top of the tank is provided with an exhaust pipe, the exhaust pipe is provided with an exhaust valve.

[0010] Preferably, the air distribution device includes an air distribution main pipe disposed at the bottom of the perforated plate, the air distribution main pipe being connected to the air inlet pipe, and air distribution branch pipes being provided at intervals on both sides of the air distribution main pipe, with air distribution holes evenly distributed on the air distribution branch pipes.

[0011] The beneficial effects of this utility model are: by setting an annular collection groove on the upper part of the inner wall of the tank and opening drain holes at intervals, the stripped impurities can be evenly and quickly entered into the collection groove from all sides of the tank and discharged through the drain pipe during backwashing, which effectively avoids the local accumulation of impurities and cleaning dead corners in the tank, shortens the backwashing time and reduces the backwashing water consumption. Attached Figure Description

[0012] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of a circulating cooling water purification device according to the present invention.

[0014] Figure 2 This is a cross-sectional view of a circulating cooling water purification device according to the present invention.

[0015] Figure 3 This is a schematic diagram of the water distribution device structure of a circulating cooling water purification device according to the present invention.

[0016] Figure 4 This is a schematic diagram of the air distribution device structure of a circulating cooling water purification device according to this utility model.

[0017] The labels in the diagram represent: 1. Tank; 2. Filter media; 3. Mesh plate; 4. Filter cap; 5. Inlet pipe; 6. Inlet valve; 7. Outlet pipe; 8. Outlet valve; 9. Backwash valve; 10. Collection tank; 11. Drain hole; 12. Drain pipe; 13. Drain valve; 14. Water distribution device; 15. Connecting pipe; 16. Water distribution branch pipe; 17. Water distribution hole; 18. Arc-shaped baffle; 19. Support column; 20. Air inlet pipe; 21. Air inlet valve; 22. Air distribution device; 23. Exhaust pipe; 24. Exhaust valve; 25. Main air distribution pipe; 26. Branch air distribution pipe; 27. Air distribution hole. Detailed Implementation

[0018] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0019] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0020] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] See Figures 1 to 4As shown, the structure of this utility model is as follows: a circulating cooling water purification device includes a tank 1, filter media 2 disposed inside the tank 1, a perforated plate 3 disposed at the lower part of the tank 1, filter caps 4 arranged in an array on the perforated plate 3, an inlet pipe 5 disposed at the top of the tank 1, an inlet valve 6 disposed on the inlet pipe 5, an outlet pipe 7 disposed at the bottom of the tank 1, an outlet valve 8 and a backwash valve 9 respectively connected to the outlet pipe 7, a ring-shaped collection trough 10 disposed at the upper part of the inner wall of the tank 1, a drain hole 11 spaced apart on the collection trough 10, a drain pipe 12 communicating with the collection trough 10 disposed on the outer wall of the tank 1, and a drain valve 13 disposed on the drain pipe 12. Specifically, under normal filtration conditions, the circulating cooling water to be treated enters the device through the inlet pipe 5 at the top of the tank 1, and the inlet valve 6 is used to control the opening and closing of the water inlet; the water flows from top to bottom inside the tank 1, first penetrating the perforated plate 3 and filter caps 4. The system consists of two layers of filter media. As the primary purification medium, the second layer of filter media efficiently removes suspended particulate matter, colloids, algae, microbial slime, and other pollutants from the water through physical interception, adsorption, and flocculation. A perforated plate 3 provides a stable support platform for the entire second layer of filter media. The filter caps 4, arrayed on the perforated plate 3, primarily intercept and support the second layer of filter media, preventing particles from being lost through the perforations of the perforated plate 3 under the influence of water flow. This ensures that the second layer of filter media maintains its integrity and effective thickness. Simultaneously, the perforated design of the filter caps 4 allows purified water to pass through smoothly. Finally, the purified water from the second layer of filter media collects at the bottom of the tank 1 and is discharged through the outlet pipe 7. The outlet valve 8 is used to regulate or cut off the output of purified water. When the filter media's filtration resistance increases and its effluent efficiency decreases due to long-term impurity retention, a backwashing procedure must be initiated to restore its filtration performance. At this time, close the inlet valve 6 and outlet valve 8, and open the backwash valve 9 and drain valve 13. The backwash water enters the tank 1 in reverse through the outlet pipe 7, and flushes and fluidizes the filter media 2 layer from bottom to top. This reverse water flow peels off the pollutants attached to the surface of the filter media 2 particles and carries them upward. During this process, the filter cap 4 still plays a key limiting role to prevent the filter media 2 from being excessively disturbed in the strong backwash water flow. The annular collection trough 10 on the upper inner wall of the tank 1 is responsible for collecting sewage during this process. Since the drain holes 11 are opened at intervals on the collection trough 10, the impurities and sewage that are flushed down can enter the collection trough 10 simultaneously and evenly from all sides of the tank 1, avoiding the local accumulation of impurities in the tank or the generation of cleaning dead corners, thereby achieving fast and thorough cleaning. The sewage containing high concentrations of impurities is finally discharged from the tank through the drain pipe 12 connected to the collection trough 10.

[0022] like Figure 2As shown, a water distribution device 14 is provided inside the tank 1. The water distribution device 14 is connected to the water inlet pipe 5. Specifically, guided by the water distribution device 14, the water flow can smoothly and evenly cover the entire surface of the filter media 2 layer, avoiding local impact, disturbance or formation of channels on the filter media 2 layer due to excessive water inlet. This ensures that every part of the filter media 2 layer can fully and effectively participate in the filtration process, improving the stability of the overall filtration effect and the treatment efficiency.

[0023] like Figure 3 As shown, the water distribution device 14 includes a connecting pipe 15 connected to the water inlet pipe 5. The connecting pipe 15 is circumferentially spaced with water distribution branch pipes 16. Water distribution holes 17 are evenly distributed on the water distribution branch pipes 16. Specifically, the water flow from the water inlet pipe 5 is received through the connecting pipe 15 and distributed to several water distribution branch pipes 16 arranged circumferentially on the horizontal plane. These water distribution branch pipes 16 together form a water distribution network covering the cross-section of the tank 1. The water distribution holes 17 evenly distributed on the water distribution branch pipes 16 can spray the water flow in the form of fine and uniform jets or water droplets onto the surface of the filter media 2 layer, further refining the uniformity of water distribution, effectively reducing the impact kinetic energy of the water flow, avoiding scouring and disturbance to the surface of the filter media 2 layer, and ensuring the smooth operation of the filtration process.

[0024] like Figure 2 As shown, an arc-shaped baffle 18 is installed inside the tank 1 at the position corresponding to the outlet pipe 7. The arc-shaped baffle 18 is fixedly connected to the inner wall of the tank 1 via a support column 19. Specifically, the arc-shaped baffle 18 is fixed inside the tank 1 via the support column 19 and is located inside the outlet of the outlet pipe 7. Its main function is to provide initial buffering and guidance for the high-pressure backwash water flow entering from the outlet pipe 7 during the backwashing process. Backwash water usually has high pressure and flow rate. The arc-shaped baffle 18, with its curved surface structure, can effectively change the direction of water flow, dispersing the concentrated water flow into a wider water curtain or flow. This avoids the high-speed, concentrated water flow directly impacting the mesh plate 3 and filter cap 4 below, and helps the backwash water flow to be distributed more evenly upwards, creating favorable conditions for subsequent uniform rinsing of the entire filter media layer 2.

[0025] like Figure 1 , Figure 2As shown, the tank 1 has an air inlet pipe 20 at the bottom, an air inlet valve 21 on the air inlet pipe 20, and an air distribution device 22 connected to the air inlet pipe 20 inside the tank 1. The tank 1 also has an exhaust pipe 23 at the top, with an exhaust valve 24 on the exhaust pipe 23. Specifically, during backwashing, the air inlet valve 21 on the air inlet pipe 20 can be opened simultaneously with or before starting the backwash water flow. Compressed air enters the air distribution device 22 inside the tank 1 through the air inlet pipe 20 and is evenly dispersed into tiny bubbles, which rise rapidly from the bottom of the filter media 2 layer. During the rise, the bubbles generate strong turbulence and scrubbing action, effectively stripping away stubborn pollutants and biofilms adhering to the surface of the filter media 2 particles, making them easier to be carried away by the backwash water flow. The exhaust pipe 23 and exhaust valve 24 at the top are used to discharge the gas generated during the backwashing process and the air inside the tank, balancing the pressure inside the tank 1 and preventing excessive pressure or incomplete backwashing due to gas accumulation, ensuring the safe and efficient operation of the combined air-water backwashing process.

[0026] like Figure 4 As shown, the air distribution device 22 includes an air distribution main pipe 25 located at the bottom of the perforated plate 3. The air distribution main pipe 25 is connected to the air inlet pipe 20. Air distribution branch pipes 26 are spaced apart on both sides of the air distribution main pipe 25, and air distribution holes 27 are evenly distributed on the air distribution branch pipes 26. Specifically, the air distribution main pipe 25 serves as the main channel for gas, connected to the air inlet pipe 20, and extends along the bottom of the perforated plate 3. The air distribution branch pipes 26 spaced apart on both sides are laid out horizontally, forming an air distribution grid covering the entire bottom area of ​​the filter media layer 2. The evenly distributed air distribution holes 27 on the air distribution branch pipes 26 can uniformly release the gas from the air distribution main pipe 25, forming countless tiny rising bubbles. This comprehensive and uniform air distribution method ensures that every part of the filter media layer 2 is scrubbed and disturbed by bubbles, thereby achieving thorough cleaning of the filter media layer 2, significantly improving backwashing efficiency, shortening backwashing time, and reducing backwashing water consumption.

[0027] In actual use, during normal filtration, the inlet valve 6 is opened, and the circulating cooling water to be treated enters the tank 1 through the inlet pipe 5. The water flows from top to bottom through the filter media 2 layer laid on top of the mesh plate 3 and filter cap 4. The filter media 2 layer efficiently removes suspended particulate matter, colloids, algae and other pollutants in the water through physical interception, adsorption and flocculation. The mesh plate 3 provides stable support for the filter media 2 layer, and the arrayed filter caps 4 accurately intercept and hold the filter media 2 particles to prevent them from being lost through the holes of the mesh plate 3 with the water flow. At the same time, the openings of the filter caps 4 allow the purified water to pass through smoothly. Finally, the purified water is collected at the bottom of the tank 1 and discharged through the outlet pipe 7. The outlet valve 8 is responsible for regulating or cutting off the purified water output. When the filter media layer 2 experiences increased filtration resistance and decreased effluent efficiency due to impurity trapping, backwashing is performed. First, close the inlet valve 6 and outlet valve 8, then open the backwash valve 9 and drain valve 13. The backwash water enters the tank 1 in reverse through the outlet pipe 7, flushing and fluidizing the filter media layer 2 from bottom to top, removing contaminants from the surface of the filter media particles and carrying them upward. At this time, the filter cap 4 continues to play a limiting role, preventing excessive disturbance of the filter media 2 in the strong backwash water flow. The impurities and sewage washed off are carried upward by the water flow. The annular collection trough 10 on the upper inner wall of the tank 1 collects sewage from all sides simultaneously and evenly through the spaced drain holes 11, preventing local accumulation of impurities or the formation of cleaning dead corners. Finally, the sewage containing high concentrations of impurities is discharged outside the tank through the drain pipe 12 connected to the collection trough 10.

[0028] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A circulating cooling water purification device, characterized in that: The tank includes a tank body (1) and filter media (2) installed inside the tank body (1). A mesh plate (3) is provided at the lower part of the tank body (1). Filter caps (4) are arranged in an array on the mesh plate (3). A water inlet pipe (5) is provided at the top of the tank body (1). A water inlet valve (6) is provided on the water inlet pipe (5). A water outlet pipe (7) is provided at the bottom of the tank body (1). A water outlet valve (8) and a backwash valve (9) are respectively connected to the water outlet pipe (7). A collection trough (10) with an annular structure is provided at the upper part of the inner wall of the tank body (1). A drain hole (11) is provided at intervals on the collection trough (10). A drain pipe (12) communicating with the collection trough (10) is provided on the outer wall of the tank body (1). A drain valve (13) is provided on the drain pipe (12).

2. The circulating cooling water purification device according to claim 1, characterized in that: The tank (1) is equipped with a water distribution device (14), which is connected to the water inlet pipe (5).

3. The circulating cooling water purification device according to claim 2, characterized in that: The water distribution device (14) includes a connecting pipe (15) connected to the water inlet pipe (5), and the connecting pipe (15) is provided with water distribution branch pipes (16) at circumferential intervals, and the water distribution branch pipes (16) are evenly distributed with water distribution holes (17).

4. The circulating cooling water purification device according to claim 1, characterized in that: An arc-shaped baffle (18) is provided inside the tank (1) at the position corresponding to the water outlet pipe (7). The arc-shaped baffle (18) is fixedly connected to the inner wall of the tank (1) through a support column (19).

5. The circulating cooling water purification device according to claim 1, characterized in that: The bottom of the tank (1) is provided with an air inlet pipe (20), the air inlet pipe (20) is provided with an air inlet valve (21), the tank (1) is provided with an air distribution device (22) connected to the air inlet pipe (20), the top of the tank (1) is provided with an exhaust pipe (23), and the exhaust pipe (23) is provided with an exhaust valve (24).

6. The circulating cooling water purification device according to claim 5, characterized in that: The air distribution device (22) includes an air distribution main pipe (25) disposed at the bottom of the perforated plate (3), the air distribution main pipe (25) is connected to the air inlet pipe (20), and air distribution branch pipes (26) are provided on both sides of the air distribution main pipe (25) at intervals, and air distribution holes (27) are evenly distributed on the air distribution branch pipes (26).

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