Alkali washing tower device with built-in annular spray head

Abstract

The utility model discloses an alkaline washing tower device with a built-in annular spray head, which comprises a tower body, a plurality of support frames are arranged in the tower body, a spraying mechanism is fixedly arranged at the lower part of each support frame, a filling layer is arranged below each spraying mechanism, and each spraying mechanism comprises a water segregator. Absorption liquid is evenly distributed to the water segregator through the annular water conveying pipe and the connecting pipe and flows into the circular water conveying plate, the circular water conveying plate rotates under the reaction force of water spraying through the annularly-distributed nozzles, the absorption liquid is evenly sprayed, the contact area with waste gas is increased, and therefore the treatment efficiency is improved. The lower part of the inner side of the tower body is used for collecting the absorption liquid through a drainage hopper which is stably connected with the tower body through a second fixing rod, and the absorption liquid enters a circulating system through a drainage pipe for treatment and recycling, so that effective utilization of resources and cost reduction are realized, and a gas cavity, a water baffle and an air outlet are designed at the lower part of the drainage hopper, so that a buffer space is provided for waste gas and the waste gas is in primary contact with the residual absorption liquid; the waste gas treatment flow is optimized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of caustic washing tower, especially to a caustic washing tower device with built-in annular spray head. BACKGROUND

[0002] In the industrial production process, a large amount of waste gas containing acidic components will be generated, which will cause serious pollution to the environment if directly discharged.

[0003] The traditional caustic washing tower device has many deficiencies when dealing with such waste gas. For example, some spray mechanisms are not reasonably designed, and the absorption liquid cannot be uniformly sprayed, resulting in insufficient contact between the waste gas and the absorption liquid, and low processing efficiency; some devices do not have a reasonable buffer structure, and the waste gas directly impacts after entering the tower body, which is not conducive to the full reaction of gas and liquid; some devices are not perfect in the collection and recycling of absorption liquid, causing resource waste and increasing processing cost.

[0004] Therefore, we propose a caustic washing tower device with built-in annular spray head. CONTENT OF THE UTILITY MODEL

[0005] The main purpose of the utility model is to provide a caustic washing tower device with built-in annular spray head, in order to prevent the direct discharge of acidic waste gas from causing serious pollution to the environment, and to improve the problems of uneven spraying of absorption liquid, insufficient gas-liquid reaction, and imperfect collection and recycling of absorption liquid in traditional caustic washing tower devices, thereby improving the processing efficiency of acidic waste gas, reducing processing cost and resource waste, and effectively solving the problems in the background art.

[0006] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0007] A caustic washing tower device with built-in annular spray head, comprising a tower body, a plurality of support frames are arranged inside the tower body, a spray mechanism is fixedly arranged at the lower part of the support frame, a filler layer is arranged below the spray mechanism, the spray mechanism comprises a water distributor, an annular water delivery pipe is arranged outside the water distributor, a plurality of connecting pipes are annularly arranged and communicated between the water distributor and the annular water delivery pipe, a first fixed rod is penetratingly arranged at the middle part of the water distributor, the top end of the first fixed rod is fixedly connected with the middle part of the bottom end of the support frame, a circular water delivery plate is rotatably connected with the bottom end of the first fixed rod, the circular water delivery plate is communicated with the water distributor, a plurality of spray heads are arranged at the bottom end of the circular water delivery plate;

[0008] The lower part of the tower body is provided with a downcomer, the downcomer is fixedly connected with a second fixed rod between the tower body, the bottom end of the downcomer is fixedly connected with a drain pipe, the bottom end of the drain pipe penetrates the bottom end of the tower body and extends to the outside, the lower part of the downcomer is provided with an air cavity, the bottom end of the tower body is provided with an air inlet at the position of the air cavity, the inner wall of the downcomer away from the air cavity is provided with a plurality of water baffle plates, a plurality of air outlets are formed in the downcomer, and the air outlets are located between adjacent water baffle plates.

[0009] The side of the tower body is provided with a circulating system, and the circulating system is connected with the spraying mechanism and the drain pipe.

[0010] Through the above technical scheme, the exhaust gas enters the air cavity from the air inlet at the bottom of the tower body, and the downcomer is provided with an air cavity at the lower part, so that the exhaust gas has a certain buffer space here, then the exhaust gas flows upward through the air outlet between the adjacent water baffle plates on the downcomer, in this process, the exhaust gas will be in initial contact with the absorption liquid that may be left in the downcomer, and the absorption liquid will absorb part of the acidic components in the exhaust gas;

[0011] The circulating system delivers the alkaline absorption liquid to the annular water delivery pipe of the spraying mechanism, the annular water delivery pipe uniformly distributes the absorption liquid to the water distributor through a plurality of connection pipes arranged in an annular array and communicated with each other, then the absorption liquid flows from the water distributor to the circular water delivery plate, and a plurality of nozzles at the bottom of the circular water delivery plate spray the absorption liquid, since the nozzles are arranged in an annular array, the absorption liquid can be uniformly sprayed in the tower body; meanwhile, the top end of the first fixed rod is fixedly connected with the support frame, so as to ensure the position stability of the spraying mechanism, and the bottom end of the first fixed rod is rotatably connected with the circular water delivery plate, so that the circular water delivery plate rotates to adapt to the reaction force generated by the nozzles during water spraying, and ensure that the nozzles can uniformly spray the absorption liquid on the area above the filling layer.

[0012] The sprayed absorption liquid fully contacts with the exhaust gas from the air outlet of the downcomer in the filling layer area, the filling layer has a large specific surface area, which can increase the gas-liquid contact area, so that the acidic components in the exhaust gas react with the alkaline absorption liquid;

[0013] The absorption liquid after absorbing the acidic gas flows downward under the action of gravity, is collected through the downcomer at the lower part of the inner side of the tower body, and is fixedly connected with the tower body through the second fixed rod, so as to ensure the stability of the structure, the collected absorption liquid is discharged from the bottom of the tower body through the drain pipe, and the discharged absorption liquid is treated in the circulating system and then reused.

[0014] Further, the circulating system comprises a circulating water tank and a circulating pump arranged at the top of the circulating water tank, the suction end of the circulating pump is fixedly connected with a first water pipe, one end of the first water pipe is fixedly installed at the top of the circulating water tank and is communicated with the inside of the circulating water tank.

[0015] By adopting the above technical scheme, when the alkali washing tower device starts to operate, the circulating pump is started, the circulating pump is a power equipment which can generate negative pressure in its interior, the suction end of the circulating pump is fixedly connected with the first water pipe, and one end of the first water pipe is installed on the top of the circulating water tank and communicates with the interior of the water tank. Under the action of the negative pressure generated by the circulating pump, the alkaline absorption liquid in the circulating water tank is sucked into the circulating pump through the first water pipe. This process utilizes the principle of pressure difference. Just like we use a straw to suck water, the low pressure in the pump makes the liquid in the water tank flow into the pump against the gravity and the pipeline resistance.

[0016] Further, the discharge end of the circulating pump is fixedly installed with the second water pipe, one side of the second water pipe is fixedly installed with a plurality of water inlet pipes, and the ends, away from the second water pipe, of the plurality of water inlet pipes penetrate the tower body and are connected with the corresponding annular water conveying pipes respectively.

[0017] By adopting the above technical scheme, after the absorption liquid is sucked into the circulating pump, a certain pressure is applied to the absorption liquid. The absorption liquid with the raised pressure is conveyed from the discharge end of the circulating pump to the second water pipe fixedly connected therewith. Such pressurized conveying can ensure that the absorption liquid has sufficient pressure and flow rate to overcome the pipeline resistance and reach the spraying mechanism.

[0018] The second water pipe plays a role in transferring and distributing the absorption liquid. It receives the absorption liquid from the circulating pump and conveys it to the plurality of water inlet pipes connected to one side thereof. The absorption liquid flows in the second water pipe and is distributed into each water inlet pipe according to a certain flow rate. The ends, away from the second water pipe, of the plurality of water inlet pipes penetrate the tower body and are connected with the corresponding annular water conveying pipes respectively, so as to convey the absorption liquid to the annular water conveying pipes. Such a design enables the circulating system to simultaneously provide the absorption liquid for a plurality of annular water conveying pipes, ensures the supply of the absorption liquid to the spraying mechanism, and further ensures that the alkaline absorption liquid can be uniformly sprayed in the tower body through the spray head, fully contacts with the waste gas, and effectively absorbs the acidic components in the waste gas.

[0019] Further, the bottom end of the drain pipe is fixedly installed with a backwater pipe, and the end, away from the drain pipe, of the backwater pipe is fixedly installed on the upper portion of one end of the circulating water tank and communicates with the interior of the circulating water tank.

[0020] By adopting the above technical scheme, when the spraying process in the alkali washing tower is completed, the absorption liquid which has absorbed the acidic gas is collected through the water collecting hopper at the lower portion of the interior of the tower body under the action of gravity. The drain pipe at the bottom of the water collecting hopper guides the absorption liquid to be discharged from the bottom of the tower body.

[0021] The backwater pipe fixedly installed at the bottom end of the drain pipe serves to transport the absorption liquid from the drain pipe back to the circulating water tank, and the absorption liquid enters the backwater pipe from the drain pipe under the guidance of gravity, and the end of the backwater pipe away from the drain pipe is connected with the upper part of one end of the circulating water tank, so that the absorption liquid can flow back to the inside of the circulating water tank smoothly, and this process enables the absorption liquid to form a circulating loop between the caustic washing tower device and the circulating water tank, so that the absorption liquid can be recycled, and when the absorption liquid returns to the circulating water tank, the circulating system such as a circulating pump can transport the absorption liquid to the spraying mechanism again for the next round of treatment of the waste gas.

[0022] Further, the top end of the tower body is provided with an air outlet, and the bottom end of the tower body is annularly arranged with a plurality of supporting legs.

[0023] By adopting the above technical scheme, the air outlet arranged at the top end of the tower body is a channel through which the purified waste gas after caustic washing treatment is discharged from the caustic washing tower, and the waste gas flows upwards in the tower, and after being fully reacted with the alkaline absorption liquid sprayed by the spraying mechanism and further contacted and reacted in the filler layer, the acidic components are removed, and the relatively clean gas is discharged from the air outlet and enters the subsequent exhaust pipe or atmosphere;

[0024] The plurality of supporting legs annularly arranged at the bottom end of the tower body mainly serve to support and stabilize the tower body, and the caustic washing tower generally has a certain height and weight, and especially during the process of being filled with liquid and treating waste gas, various stresses are generated, the supporting legs are uniformly distributed at the bottom of the tower body, can disperse the weight of the tower body to the ground, ensure that the tower body remains stable during operation, and avoid the tower body from being inclined, collapsed and the like due to unstable center of gravity or uneven stress on the ground.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] (1) The caustic washing tower device with the built-in annular spray head uniformly distributes the absorption liquid to the water distributor through the annular water delivery pipe and the plurality of connecting pipes, and then the absorption liquid flows into the circular water delivery plate, and the spray heads are annularly distributed, the bottom end of the first fixed rod is rotationally connected with the circular water delivery plate, the circular water delivery plate can be rotated to adapt to the reaction force of the spray head, the spray head can uniformly spray the absorption liquid on the area above the filler layer, the contact area of the absorption liquid and the waste gas is greatly increased, and the waste gas treatment efficiency is improved.

[0027] (2) The utility model discloses a caustic tower device of built-in annular shower head, and the lower water hopper at the lower part of the tower body is fixedly connected with the tower body through the second fixed rod, has good stability, can effectively collect the absorption liquid after absorbing the acidic gas, and after discharging through the drain pipe, enters the circulation system and handles and reuses again, realizes the effective utilization of resources, reduces the processing cost, and at the same time, the design that the lower water hopper lower part sets up the air cavity and the water baffle and the air outlet hole makes the waste gas to have the buffer space and can preliminarily contact with the residual absorption liquid, and the whole waste gas treatment flow is optimized. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structure schematic view of the utility model discloses a caustic tower device of built-in annular shower head.

[0029] Figure 2 It is a spray mechanism structure schematic view of the utility model discloses a caustic tower device of built-in annular shower head.

[0030] Figure 3 It is a caustic tower device of built-in annular shower head of the utility model discloses a kind of Figure 1 Enlarged view of A place in middle.

[0031] In the drawing: 1, tower body;2, spray mechanism;3, support frame;4, first fixed rod;5, water distributor;6, annular water delivery pipe;7, connecting pipe;8, water inlet pipe;9, circular water delivery plate;10, shower head;11, lower water hopper;12, drain pipe;13, air cavity;14, air inlet;15, water baffle;16, air outlet;17, second fixed rod;18, circulation system;19, circulating water tank;20, circulating pump;21, backwater pipe;22, first water pipe;23, second water pipe;24, filling layer;25, air inlet. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0033] In order to prevent the direct discharge of acidic waste gas from causing serious pollution to the environment, and to improve the problems of uneven spraying of absorption liquid, insufficient gas-liquid reaction, imperfect absorption liquid collection and recycling in the traditional caustic tower device, thereby improving the treatment efficiency of acidic waste gas, reducing the processing cost and reducing resource waste, such as Figure 1 、 Figure 2 、 Figure 3As shown, a caustic washing tower device with built-in annular spray head, comprising a tower body 1, the inside of the tower body 1 is provided with a plurality of support frames 3, the lower part of the support frame 3 is fixedly provided with a spraying mechanism 2, the lower part of the spraying mechanism 2 is provided with a filling layer 24, the spraying mechanism 2 comprises a water distributor 5, the outside of the water distributor 5 is provided with an annular water delivery pipe 6, a plurality of connecting pipes 7 are arranged in annular array and communicated between the water distributor 5 and the annular water delivery pipe 6, a first fixed rod 4 is arranged through the middle part of the water distributor 5, the top end of the first fixed rod 4 is fixedly connected with the middle part of the bottom end of the support frame 3, a circular water delivery plate 9 is rotatably connected to the bottom end of the first fixed rod 4, the circular water delivery plate 9 is communicated with the water distributor 5, a plurality of spray heads 10 are arranged at the bottom end of the circular water delivery plate 9;

[0034] A lower water hopper 11 is arranged at the lower part of the inside of the tower body 1, the second fixed rod 17 is fixedly connected between the lower water hopper 11 and the tower body 1, the drain pipe 12 is fixedly connected to the bottom end of the lower water hopper 11, the bottom end of the drain pipe 12 penetrates the bottom end of the tower body 1 and extends to the outside, the air cavity 13 is arranged at the lower part of the lower water hopper 11, the air inlet 14 is arranged at the bottom end of the tower body 1 and located at the position of the air cavity 13, a plurality of water baffles 15 are arranged on the inner wall of the lower water hopper 11 away from the air cavity 13, the air outlet hole 16 is arranged on the lower water hopper 11, and the air outlet hole 16 is located between adjacent water baffles 15 and is provided with a plurality of air outlet holes 16.

[0035] The tower body 1 is provided with a circulating system 18, and the circulating system 18 is connected with the spraying mechanism 2 and the drain pipe 12.

[0036] In use, the exhaust gas enters the air cavity 13 from the air inlet 14 at the bottom of the tower body 1, and the exhaust gas has a certain buffer space here because the air cavity 13 is arranged at the lower part of the lower water hopper 11, then the exhaust gas flows upward through the air outlet hole 16 between the adjacent water baffles 15 on the lower water hopper 11, in this process, the exhaust gas will preliminarily contact the absorption liquid possibly remaining in the lower water hopper 11, and the absorption liquid will absorb part of the acidic components in the exhaust gas;

[0037] The circulation system 18 delivers the alkaline absorbent to the annular water pipe 6 of the spraying mechanism 2. The annular water pipe 6 distributes the absorbent evenly to the water distributor 5 through multiple connecting pipes 7 arranged in an annular array. Then, the absorbent flows from the water distributor 5 into the circular water plate 9. Multiple nozzles 10 at the bottom of the circular water plate 9 spray the absorbent. Since the nozzles 10 are distributed in an annular pattern, the absorbent can be sprayed evenly inside the tower body 1. At the same time, the top of the first fixed rod 4 is fixedly connected to the support frame 3 to ensure the stability of the spraying mechanism 2. The bottom of the first fixed rod 4 is rotatably connected to the circular water plate 9. This structure is designed to accommodate the reaction force generated by the nozzles 10 during the spraying process to allow the circular water plate 9 to rotate, ensuring that the nozzles 10 can spray the absorbent evenly on the area above the filling layer 24.

[0038] The sprayed absorbent liquid comes into full contact with the exhaust gas coming out of the exhaust port 16 of the drain hopper 11 in the filling layer 24 area. The filling layer 24 has a large specific surface area, which can increase the gas-liquid contact area and allow the acidic components in the exhaust gas to undergo a neutralization reaction with the alkaline absorbent liquid.

[0039] After absorbing the acidic gas, the absorbent liquid flows downward under the action of gravity and is collected through the drain hopper 11 at the lower inner side of the tower body 1. The drain hopper 11 is fixedly connected to the tower body 1 by the second fixing rod 17 to ensure the stability of its structure. The collected absorbent liquid is discharged from the bottom of the tower body 1 through the drain pipe 12. The discharged absorbent liquid will enter the circulation system 18 for treatment and reuse.

[0040] For example, such as Figure 1 As shown, the present invention also includes a circulation system 18 comprising a circulation tank 19 and a circulation pump 20 disposed on the top of the circulation tank 19. The suction end of the circulation pump 20 is fixedly connected to a first water pipe 22, and one end of the first water pipe 22 is fixedly installed on the top of the circulation tank 19 and communicates with the inside of the circulation tank 19.

[0041] When the alkaline washing tower device is in use, the circulating pump 20 starts. The circulating pump is a power device that can generate negative pressure inside. The suction end of the circulating pump 20 is fixedly connected to the first water pipe 22, and one end of the first water pipe 22 is installed on the top of the circulating water tank 19 and communicates with the inside of the tank. Under the negative pressure generated by the circulating pump 20, the alkaline absorption liquid in the circulating water tank 19 will be sucked into the circulating pump 20 through the first water pipe 22. This process utilizes the principle of pressure difference, just like when we use a straw to suck water. The low pressure inside the pump causes the liquid in the tank to overcome gravity and pipe resistance and flow into the pump.

[0042] For example, such as Figure 1As shown, the utility model still includes, the discharge end fixed mounting of circulating pump 20 has second water pipe 23, one side fixed mounting of second water pipe 23 has multiple water inlet pipe 8, multiple water inlet pipe 8 far from the one end of second water pipe 23 and is connected with corresponding annular water pipe 6 respectively through tower body 1.

[0043] In use, after the absorption liquid is sucked in, the circulating pump 20 will exert a certain pressure on it, and the absorption liquid after the pressure is raised is transported to the second water pipe 23 fixedly connected thereto from the discharge end of the circulating pump 20, and such pressurized transportation can ensure that the absorption liquid has sufficient pressure and flow rate to overcome the pipeline resistance and reach the spraying mechanism;

[0044] The second water pipe 23 plays a role in transferring and distributing the absorption liquid, receives the absorption liquid from the circulating pump 20, and transports it to the multiple water inlet pipes 8 connected to one side thereof, and the multiple water inlet pipes 8 are connected to the second water pipe 23 respectively, so that the absorption liquid flows in the second water pipe 23 and is distributed into each water inlet pipe 8 according to a certain flow rate, and the one end of the water inlet pipe 8 far from the second water pipe 23 penetrates through the tower body 1 and is connected to the corresponding annular water pipe 6 respectively, so as to transport the absorption liquid to the annular water pipe 6, and such a design enables the circulating system to provide the absorption liquid for multiple annular water pipes 6 at the same time, ensures the supply of the absorption liquid in the spraying mechanism, and further ensures that the alkaline absorption liquid can be uniformly sprayed in the tower body 1 through the spray head 10, fully contacts with the waste gas, and effectively absorbs the acidic components in the waste gas.

[0045] For example, Figure 1 As shown, the utility model still includes, the bottom end fixed mounting of drain pipe 12 has backwater pipe 21, the one end fixed mounting of backwater pipe 21 far from drain pipe 12 is in the upper portion of one end of circulating water tank 19 and is connected with the inside of circulating water tank 19.

[0046] In use, when the spraying process in the caustic washing tower is completed, the absorption liquid that has absorbed the acidic gas is collected through the downcomer 11 at the lower part of the inside of the tower body 1 under the action of gravity, and the drain pipe 12 at the bottom of the downcomer 11 guides the absorption liquid out of the bottom of the tower body 1;

[0047] The backwater pipe 21 fixedly installed at the bottom end of the drain pipe 12 plays a role in transporting the absorption liquid from the drain pipe 12 back to the circulating water tank 19, and the absorption liquid enters the backwater pipe 21 from the drain pipe 12 under the guidance of gravity, and the one end of the backwater pipe 21 far from the drain pipe 12 is connected to the upper portion of one end of the circulating water tank 19, so that the absorption liquid can flow back to the inside of the circulating water tank 19 smoothly, and this process enables the absorption liquid to form a circulating loop between the caustic washing tower device and the circulating water tank 19, so that the absorption liquid can be recycled, and when the absorption liquid returns to the circulating water tank 19, the circulating system such as the circulating pump can transport it to the spraying mechanism again for the next round of treatment of the waste gas.

[0048] For example, such as Figure 1 As shown, the present invention also includes an air outlet 25 at the top of the tower body 1 and multiple support legs arranged in a ring at the bottom of the tower body 1.

[0049] When in use, the air outlet 25 at the top of the tower is the channel for the purified waste gas after alkaline washing to be discharged from the alkaline washing tower. The waste gas flows from bottom to top in the tower. After fully reacting with the alkaline absorption liquid sprayed by the spraying mechanism and further contacting and reacting in the packing layer, the acidic components are removed, and the relatively clean gas is discharged from the air outlet 25 and enters the subsequent emission pipe or the atmosphere.

[0050] The multiple supporting legs arranged in a ring at the bottom of the tower body mainly serve to support and stabilize the tower body. Alkali washing towers generally have a certain height and weight, especially when filled with liquid and treating waste gas, various stresses will be generated. These supporting legs are evenly distributed at the bottom of the tower body, which can distribute the weight of the tower body to the ground, ensuring that the tower body remains stable during operation and avoiding situations such as tilting or collapse of the tower body due to unstable center of gravity or uneven ground force.

[0051] It should be noted that this utility model is an alkaline washing tower device with a built-in annular nozzle. When the circulation pump 20 is started, the circulation pump 20 generates negative pressure, and the alkaline absorbent liquid in the circulation water tank 19 is drawn into the pump through the first water pipe 22. At the same time, the exhaust gas containing acidic components is introduced into the air inlet 14 at the bottom of the tower body 1. The exhaust gas enters the air chamber 13 at the bottom of the lower water tank 11 for buffering, and then flows upward through the air outlet 16 between the adjacent baffles 15 on the lower water tank 11, and initially contacts the absorbent liquid that may remain in the lower water tank 11, and begins to absorb some of the acidic components.

[0052] The circulating pump 20 pressurizes the absorbed liquid and then transports it through the second water pipe 23. The second water pipe 23 distributes the absorbed liquid to multiple inlet pipes 8, which in turn transport the absorbed liquid to the annular water supply pipe 6 of the spraying mechanism 2. The annular water supply pipe 6 distributes the absorbed liquid evenly to the water distributor 5 through the connecting pipe 7. The absorbed liquid then flows into the circular water supply plate 9 and is sprayed evenly in an annular pattern from the nozzles 10 at the bottom of the circular water supply plate 9. During the spraying process, the circular water supply plate 9 can rotate due to the reaction force, so that the absorbed liquid is sprayed more evenly in the area above the filling layer 24. The sprayed absorbed liquid and the exhaust gas coming out of the air outlet 16 of the lower water tank 11 are in full contact in the filling layer 24. By utilizing the large specific surface area of ​​the filling layer 24, the acidic components in the exhaust gas and the alkaline absorbed liquid undergo a neutralization reaction.

[0053] The absorption liquid after absorbing the acid gas is collected by the water bucket 11 under the action of gravity, flows back to the circulating water tank 19 through the drain pipe 12 and the backwater pipe 21, forms a circulating loop, realizes the recycling of the absorption liquid, the acid components in the waste gas are removed after the full reaction with the absorption liquid, the purified waste gas flows from bottom to top, and is finally discharged from the air outlet 25 at the top end of the tower body 1, enters the subsequent discharge pipeline or the atmospheric environment.

[0054] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A caustic washing tower apparatus with built-in annular spray head comprising a tower body (1), characterized in that, The inside of the tower body (1) is provided with a plurality of support frames (3), the lower part of the support frame (3) is fixedly provided with a spraying mechanism (2), the lower part of the spraying mechanism (2) is provided with a filling layer (24), the spraying mechanism (2) comprises a water distributor (5), the outer part of the water distributor (5) is provided with an annular water conveying pipe (6), a plurality of connecting pipes (7) are arranged in annular array between the water distributor (5) and the annular water conveying pipe (6) and are communicated, a first fixed rod (4) is arranged through the middle part of the water distributor (5), the top end of the first fixed rod (4) is fixedly connected with the bottom end of the middle part of the support frame (3), a circular water conveying plate (9) is rotatably connected with the bottom end of the first fixed rod (4), the circular water conveying plate (9) is communicated with the water distributor (5), and a plurality of spray heads (10) are arranged on the bottom end of the circular water conveying plate (9). The lower part of the inside of the tower body (1) is provided with a water sump (11), the second fixed rod (17) is fixedly connected between the water sump (11) and the tower body (1), the bottom end of the water sump (11) is fixedly connected with a drain pipe (12), the bottom end of the drain pipe (12) penetrates the bottom end of the tower body (1) and extends to the outside, the lower part of the water sump (11) is provided with an air cavity (13), the bottom end of the tower body (1) is provided with an air inlet (14) at the position of the air cavity (13), the inner wall of the water sump (11) away from the air cavity (13) is provided with a plurality of water baffles (15), a plurality of air outlets (16) are formed in the water sump (11) and are arranged between adjacent water baffles (15). One side of the tower body (1) is provided with a circulating system (18), and the circulating system (18) is connected with the spraying mechanism (2) and the drain pipe (12).

2. The caustic wash tower apparatus having an internal annular spray head of claim 1, wherein: The circulating system (18) comprises a circulating water tank (19) and a circulating pump (20) arranged on the top of the circulating water tank (19), the suction end of the circulating pump (20) is fixedly connected with a first water pipe (22), one end of the first water pipe (22) is fixedly installed on the top of the circulating water tank (19) and is communicated with the inside of the circulating water tank (19).

3. The caustic wash tower apparatus having an internal annular spray head of claim 2, wherein: The discharge end of the circulating pump (20) is fixedly installed with a second water pipe (23), a plurality of water inlet pipes (8) are fixedly installed on one side of the second water pipe (23), and one end of the plurality of water inlet pipes (8) away from the second water pipe (23) penetrates the tower body (1) and is connected with the corresponding annular water conveying pipe (6).

4. The caustic wash tower apparatus having an internal annular spray head of claim 1, wherein: The bottom end of the drain pipe (12) is fixedly installed with a backwater pipe (21), one end of the backwater pipe (21) away from the drain pipe (12) is fixedly installed on the upper part of one end of the circulating water tank (19) and is communicated with the inside of the circulating water tank (19).

5. The caustic wash tower apparatus having an internal annular spray head of claim 1, wherein: The top end of the tower body (1) is provided with an air outlet (25), and the bottom end of the tower body (1) is annularly arranged with a plurality of supporting legs.

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