Low-concentration vocs exhaust gas high-efficiency biological trickling tower

Abstract

The utility model relates to the technical field of trickling filter tower, concretely relates to a kind of low concentration VOCs waste gas high-efficiency biological trickling filter tower, including trickling filter tower shell, the bottom end of trickling filter tower shell is fixedly connected with water pump, one end of water pump is fixedly connected with first delivery pipe, the side of first delivery pipe is fixedly connected with several second delivery pipes, the inner wall of trickling filter tower shell is sequentially fixedly connected with first packing layer, second packing layer and third packing layer from top to bottom, several second delivery pipes and first packing layer, second packing layer and third packing layer are staggered distribution, first packing layer is cylinder, and second packing layer includes cylinder and cone.Compared with prior art, the present application improves the uniformity of waste gas entering the second packing layer, ensures the treatment effect of the second packing layer on the waste gas, and the waste gas passing through the second packing layer enters the first packing layer, so that the first packing layer re-treats the waste gas, improving the treatment efficiency and quality of VOCs waste gas.

Description

Technical Field

[0001] This utility model relates to the field of trickling filter technology, and in particular to a high-efficiency biological trickling filter for low-concentration VOCs waste gas. Background Technology

[0002] A bio-trickling filter is a biological deodorization device. Gas containing pollutants enters the bio-trickling filter with or without pretreatment. When the moistened odorous gas passes through the packing layer covered with a biofilm, the malodorous substances in the gas dissolve in water and are adsorbed and absorbed by the circulating liquid and the microorganisms attached to the surface of the packing, thereby purifying the gas.

[0003] In the prior art, Chinese patent CN221085208U discloses a novel biotrickling filter VOCs waste gas removal device. The biotrickling filter tower is equipped with a reverse liquid inlet pipe, which is connected inside the cavity and has a reverse nozzle with the spray direction upward. This overcomes the shortcomings of the prior art biotrickling filter tower in that the middle and lower layers of microorganisms have limited nutrient uptake after long-term use. However, in practical applications, the emission volume of low-concentration VOCs waste gas is often large and the composition is complex. When using a traditional biotrickling filter tower to treat low-concentration VOCs waste gas, the middle and lower layers of the biological packing in the biotrickling filter tower are prone to blockage, which leads to a reduction in the efficiency of VOCs waste gas treatment. Therefore, we disclose a high-efficiency biotrickling filter tower for low-concentration VOCs waste gas. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a high-efficiency bio-trickling filter for low-concentration VOCs waste gas, so as to solve the problem of blockage in the middle and lower layers of biological packing in bio-trickling filter, which reduces the efficiency of VOCs waste gas treatment.

[0005] Based on the above objectives, this utility model provides a high-efficiency biological trickling filter for low-concentration VOCs waste gas, including a trickling filter shell. A water pump is fixedly connected to the bottom end of the trickling filter shell, and a first delivery pipe is fixedly connected to one end of the water pump. A plurality of second delivery pipes are fixedly connected to one side of the first delivery pipe. A first packing layer, a second packing layer, and a third packing layer are fixedly connected sequentially from top to bottom on the inner wall of the trickling filter shell. The plurality of second delivery pipes are staggered with the first, second, and third packing layers. The first packing layer is a cylinder, and the second packing layer includes a cylinder and a cone. The bottom end of the cylinder is fixedly connected to the top end of the cone. The third packing layer is a hollow cone. An air inlet pipe is fixedly connected to the bottom end of the trickling filter shell, and an air outlet pipe is fixedly connected to the top end of the trickling filter shell. The air inlet pipe is located above the water pump, and the third packing layer is located above the air inlet pipe.

[0006] Preferably, the first delivery pipe is an inverted U-shaped pipe, one end of the first delivery pipe is fixedly connected to the water pump, and the other end of the first delivery pipe is fixedly connected to the second delivery pipe.

[0007] Preferably, a connecting frame is fixedly connected to the outer wall of the trickling filter shell, and the connecting frame is fixedly connected to the first conveying pipe.

[0008] Preferably, a baffle is fixedly connected to the inner wall of the trickling filter shell, the air inlet pipe is an L-shaped pipe, one end of the air inlet pipe extends to the middle of the inner cavity of the trickling filter shell, the end of the air inlet pipe inside the trickling filter shell is bent upward, the baffle is located between the air inlet pipe and the third packing layer, the baffle includes a baffle plate and several fixing rods, the baffle plate and several fixing rods are fixedly connected, and several fixing rods are all fixedly connected to the trickling filter shell, the baffle is located at the upper end of the air inlet pipe, the baffle plate is umbrella-shaped, and the top end of the air inlet pipe is located inside the baffle plate.

[0009] Preferably, the inner wall of the trickling filter tower shell is fixedly connected to several fixed frames, the fixed frames have a rotating hole in the middle, a rotating ring is rotatably connected to the middle of the rotating hole, a connecting cylinder is fixedly connected to the inner wall of the rotating ring, two limiting rings are fixedly connected to the lower end of the second conveying pipe, the connecting cylinder is sleeved between the two limiting rings, several connecting pipes are fixedly connected to the bottom end of the connecting cylinder, and a spraying pipe is fixedly connected to the lower end of the connecting pipes.

[0010] Preferably, the fixing frame includes a fixing block and a plurality of connecting rods, the fixing block and the plurality of connecting rods are fixedly connected, the plurality of connecting rods are fixedly connected to the outer shell of the trickling filter tower, and the fixing block is located on the longitudinal central axis of the outer shell of the trickling filter tower.

[0011] Preferably, the rotating hole is a cross-shaped hole, and both ends of the connecting cylinder pass through the rotating hole to the outside of the fixing frame. The rotating ring and the connecting cylinder form a cross shape, and both the connecting cylinder and the rotating ring are rotatably connected to the rotating hole.

[0012] Preferably, the spray pipe is an annular pipe, and a plurality of water spray pipes are fixedly connected to the bottom end of the spray pipe, with the plurality of water spray pipes located in the middle above the first filler layer.

[0013] The beneficial effects of this invention are as follows: A water pump draws liquid from inside the trickling filter tower shell into the first conveying pipe, which then feeds it into the second conveying pipe. The liquid output from the second conveying pipe flows into the first, second, and third packing layers, ensuring sufficient liquid in each layer and guaranteeing their normal operation. This reduces the risk of blockage by exhaust gas in the lower part of the trickling filter tower shell. When exhaust gas enters the shell and comes into contact with the third packing layer, most of the gas can pass through it quickly. Furthermore, the third packing layer alters the flow direction of the exhaust gas, allowing it to pass through more efficiently. The exhaust gas can pass through the third packing layer relatively evenly and be filtered by it, preventing the exhaust gas from passing through only one part of the third packing layer and causing blockage in that part. The exhaust gas passing through the third packing layer continues to enter the second packing layer. Before entering the second packing layer, the flow direction is changed again by the second packing layer, which disperses and concentrates the exhaust gas flowing into the second packing layer, thereby improving the uniformity of the exhaust gas entering the second packing layer and ensuring the treatment effect of the second packing layer on the exhaust gas. The exhaust gas passing through the second packing layer enters the first packing layer, where the first packing layer treats the exhaust gas again, improving the treatment efficiency and quality of VOCs exhaust gas.

[0014] The fixing frame restricts the rotation position of the rotating ring and the connecting cylinder through the rotating hole. The connecting cylinder can rotate within the limiting ring, allowing the liquid in the second delivery pipe to enter the connecting cylinder, reducing the liquid overflow at the connection between the second delivery pipe and the connecting cylinder. Then, the liquid in the connecting cylinder flows through the connecting pipe into the spray pipe. Because the water pressure is not constant during liquid delivery, the impact of the water flow causes the connecting cylinder and the rotating ring to rotate within the rotating hole, causing the spray pipe to rotate when spraying liquid. This makes the liquid scattered on the upper part of the first packing layer more even, resulting in better performance of the first packing layer. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model 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 for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of an embodiment of the present utility model;

[0017] Figure 2 This is a partially cross-sectional structural diagram of the outer shell of the trickling filter tower of this utility model;

[0018] Figure 3This is a partial cross-sectional structural diagram of the fixing frame of this utility model;

[0019] Figure 4 This utility model Figure 3 A magnified structural diagram at point A;

[0020] Figure 5 This is a partial cross-sectional structural diagram of the third filler layer of this utility model.

[0021] The diagram is marked as follows:

[0022] 1. Trickling filter shell; 2. Water pump; 3. First delivery pipe; 4. Second delivery pipe; 5. First packing layer; 6. Second packing layer; 7. Third packing layer; 8. Fixing frame; 9. Rotating hole; 10. Rotating ring; 11. Connecting cylinder; 12. Limiting ring; 13. Connecting pipe; 14. Spraying pipe; 15. Shielding frame; 16. Air inlet pipe; 17. Air outlet pipe. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] like Figures 1-5As shown, a high-efficiency biological trickling filter for low-concentration VOCs waste gas includes a trickling filter shell 1. A water pump 2 is fixedly connected to the bottom of the trickling filter shell 1. One end of the water pump 2 is fixedly connected to a first delivery pipe 3. Several second delivery pipes 4 are fixedly connected to one side of the first delivery pipe 3. A first packing layer 5, a second packing layer 6, and a third packing layer 7 are sequentially fixedly connected to the inner wall of the trickling filter shell 1 from top to bottom. The several second delivery pipes 4 are staggered with the first packing layer 5, the second packing layer 6, and the third packing layer 7. The first packing layer 5 is a cylinder. The second packing layer 6 includes a cylinder and a cone, with the bottom end of the cylinder fixedly connected to the top end of the cone. The third packing layer 7 is a hollow cone. An air inlet pipe 16 is fixedly connected to the bottom of the trickling filter shell 1. The top of the filter is fixedly connected to an outlet pipe 17. An inlet pipe 16 is located above the water pump 2. The third packing layer 7 is located above the inlet pipe 16. The first delivery pipe 3 is an inverted U-shaped pipe. One end of the first delivery pipe 3 is fixedly connected to the water pump 2, and the other end of the first delivery pipe 3 is fixedly connected to the second delivery pipe 4. A connecting frame is fixedly connected to the outer wall of the trickling filter shell 1, and the connecting frame is fixedly connected to the first delivery pipe 3. A baffle frame 15 is fixedly connected to the inner wall of the trickling filter shell 1. The inlet pipe 16 is an L-shaped pipe. One end of the inlet pipe 16 extends to the middle of the inner cavity of the trickling filter shell 1, and the end of the inlet pipe 16 inside the trickling filter shell 1 bends upward. The baffle frame 15 is located between the inlet pipe 16 and the third packing layer 7. The baffle frame 15 includes a baffle plate and several fixing rods. Several fixed rods are fixedly connected to the outer shell 1 of the trickling filter tower. A baffle 15 is located at the upper end of the air inlet pipe 16. The baffle is umbrella-shaped, and the top of the air inlet pipe 16 is located inside the baffle. In use, a water pump 2 is fixedly connected to the bottom end of the outer shell 1 of the trickling filter tower. One end of the water pump 2 is fixedly connected to a first delivery pipe 3. Several second delivery pipes 4 are fixedly connected to one side of the first delivery pipe 3, so that the water pump 2 can input the liquid inside the outer shell 1 of the trickling filter tower into the first delivery pipe 3, and then send it into the second delivery pipes 4 through the first delivery pipe 3. A first packing layer 5, a second packing layer 6, and a third packing layer 7 are fixedly connected from top to bottom through the inner wall of the outer shell 1 of the trickling filter tower. Several second delivery pipes 4 intersect with the first packing layer 5, the second packing layer 6, and the third packing layer 7. The staggered distribution ensures that the liquid output from the second conveying pipe 4 flows into the first packing layer 5, the second packing layer 6, and the third packing layer 7 respectively. This guarantees sufficient liquid in each of these layers, ensuring their normal operation and reducing the risk of blockage of exhaust gas in the lower part of the trickling filter shell 1. The first packing layer 5 is cylindrical, the second packing layer 6 includes both cylindrical and conical sections, and the third packing layer 7 is a hollow cone. This design allows most of the exhaust gas to pass through the third packing layer 7 quickly upon entering the trickling filter shell 1. Furthermore, the third packing layer 7 alters the flow direction of the exhaust gas, ensuring it passes through more evenly.The waste gas is filtered by the third packing layer 7 to prevent blockage caused by the waste gas passing through only one point in the third packing layer 7. The waste gas continues upward into the second packing layer 6, where its flow direction is changed again, further dispersing and concentrating the waste gas flowing into the second packing layer 6. This improves the uniformity of the waste gas entering the second packing layer 6, thereby improving the treatment efficiency and quality of VOCs waste gas. The waste gas then enters the first packing layer 5, where it is treated again to ensure that the treatment efficiency meets the requirements. The bottom of the trickling filter tower shell 1 is fixedly connected to the inlet... An air inlet pipe 16 is fixedly connected to the top of the trickling filter shell 1 via an outlet pipe 17. The inlet pipe 16 is located above the water pump 2, and the third packing layer 7 is located above the inlet pipe 16. This allows the waste gas to enter the trickling filter shell 1 through the inlet pipe 16 and first separate from the third packing layer 7. The waste gas treated inside the trickling filter shell 1 is then discharged through the outlet pipe 17, ensuring that the circulating liquid at the bottom of the trickling filter shell 1 does not contact the inlet pipe 16. The first conveying pipe 3 is an inverted U-shaped pipe. One end of the first conveying pipe 3 is fixedly connected to the water pump 2, and the other end is fixedly connected to the second conveying pipe 4. This allows the liquid in the first conveying pipe 3 to be transported to the top of the first conveying pipe 3 and then, during its descent, to be input into the second conveying pipe 4, preventing... If the pressure difference of the liquid output in the second delivery pipe 4 is too large, or even if the circulating liquid in the second delivery pipe 4 located at the top is insufficient, a connecting frame is fixedly connected to the outer wall of the trickling filter tower shell 1. The connecting frame is fixedly connected to the first delivery pipe 3, so that the position of the first delivery pipe 3 is fixed in the trickling filter tower shell 1 by the connecting frame. A baffle 15 is fixedly connected to the inner wall of the trickling filter tower shell 1. The air inlet pipe 16 is an L-shaped pipe. One end of the air inlet pipe 16 extends to the middle of the inner cavity of the trickling filter tower shell 1, and the end of the air inlet pipe 16 inside the trickling filter tower shell 1 bends upward, so that the exhaust gas output from the air inlet pipe 16 is discharged upward in the inner cavity of the trickling filter tower shell 1. This fixes the position of the baffle 15 in the trickling filter tower shell 1. Located between the inlet pipe 16 and the third packing layer 7, the baffle frame 15 includes a baffle plate and several fixed rods. The baffle plate and the fixed rods are fixedly connected, and the fixed rods are all fixedly connected to the outer shell 1 of the trickling filter tower. The baffle frame 15 is located at the upper end of the inlet pipe 16. The baffle plate is umbrella-shaped, and the top end of the inlet pipe 16 is located inside the baffle plate. This allows the exhaust gas discharged from the inlet pipe 16 to be dispersed by the baffle plate and then diffuse into the inner cavity of the outer shell 1 of the trickling filter tower before drifting into the third packing layer 7. This reduces the possibility of excessive exhaust gas being treated in one part of the third packing layer 7, which could cause blockage. It also ensures that liquid falling from the upper end of the inlet pipe 16 will fall onto the upper end of the baffle frame 15 and slide down to the bottom end of the outer shell 1 of the trickling filter tower, preventing liquid from entering the inlet pipe 16.

[0026] As a preferred embodiment of this example, Figures 2-4As shown, several fixing frames 8 are fixedly connected to the inner wall of the trickling filter tower shell 1. A rotating hole 9 is opened in the middle of the fixing frame 8, and a rotating ring 10 is rotatably connected to the middle of the rotating hole 9. A connecting cylinder 11 is fixedly connected to the inner wall of the rotating ring 10. Two limiting rings 12 are fixedly connected to the lower end of the second conveying pipe 4. The connecting cylinder 11 is sleeved between the two limiting rings 12. Several connecting pipes 13 are fixedly connected to the bottom end of the connecting cylinder 11. A spray pipe 14 is fixedly connected to the lower end of the connecting pipe 13. The fixing frame 8 includes a fixing block and several connecting rods. The fixing block and several connecting rods are fixedly connected. Several connecting rods are fixedly connected to the trickling filter tower shell 1. The fixing block is located on the longitudinal central axis of the trickling filter tower shell 1. The rotating hole 9 is a cross-shaped hole. Both ends of the connecting cylinder 11 pass through the rotating hole 9 to the fixing frame 8. Outside the frame 8, the rotating ring 10 and the connecting cylinder 11 form a cross shape. Both the connecting cylinder 11 and the rotating ring 10 are rotatably connected to the rotating hole 9. The spray pipe 14 is an annular pipe, and several water spray pipes are fixedly connected to the bottom end of the spray pipe 14. The several water spray pipes are located in the middle above the first packing layer 5. Several fixing frames 8 are fixedly connected to the inner wall of the trickling filter tower shell 1. The fixing frame 8 has a rotating hole 9 in the middle, and the rotating ring 10 is rotatably connected to the middle of the rotating hole 9. The connecting cylinder 11 is fixedly connected to the inner wall of the rotating ring 10, so that the position of the fixing frame 8 is fixed in the trickling filter tower shell 1. The fixing frame 8 restricts the rotation position of the rotating ring 10 and the connecting cylinder 11 through the rotating hole 9. Two limiting rings 12 are fixedly connected to the lower end of the second conveying pipe 4. The connecting cylinder 11 is sleeved on the... Between the two limiting rings 12, the limiting rings 12 restrict the rotational position of the connecting cylinder 11, thereby allowing the connecting cylinder 11 to rotate within the limiting rings 12, and allowing the liquid in the second conveying pipe 4 to enter the connecting cylinder 11, reducing the liquid overflow at the connection between the second conveying pipe 4 and the connecting cylinder 11. Several connecting pipes 13 are fixedly connected to the bottom end of the connecting cylinder 11, and the lower end of the connecting pipes 13 is fixedly connected to the spray pipe 14, allowing the liquid in the connecting cylinder 11 to flow into the spray pipe 14 through the connecting pipes 13. Because the water pressure is not constant during liquid transportation, the impact of the water flow causes the connecting cylinder 11 and the rotating ring 10 to rotate within the rotating hole 9, causing the spray pipe 14 to also rotate when spraying liquid, thus allowing the liquid from the spray pipe 14 to scatter onto the upper end of the first packing layer 5. The liquid is more evenly distributed, resulting in better performance of the first packing layer 5. The fixing frame 8, including a fixing block and several connecting rods, is fixedly connected to the trickling filter shell 1. The connecting rods are fixedly connected to the shell 1 of the trickling filter. The fixing block is located on the longitudinal central axis of the shell 1, allowing the fixing frame 8 to restrict the rotation of the connecting cylinder 11 on the central axis of the shell 1. This ensures that the liquid sprayed from the spray pipe 14 falls more evenly on the upper end of the first packing layer 5. The rotating hole 9 is a cross-shaped hole, with both ends of the connecting cylinder 11 penetrating through the rotating hole 9 to the outside of the fixing frame 8. The rotating ring 10 and the connecting cylinder 11 form a cross shape, and both the connecting cylinder 11 and the rotating ring 10 are rotatably connected within the rotating hole 9. This provides good limiting effect for the connecting cylinder 11 and the rotating ring 10 within the rotating hole 9.To prevent the connecting cylinder 11 from falling off, a ring-shaped spray pipe 14 is used. Several water spray pipes are fixedly connected to the bottom of the spray pipe 14, positioned in the middle above the first packing layer 5. This ensures that the liquid sprayed from the spray pipe 14 into the first packing layer 5 is more evenly distributed, resulting in better treatment of the exhaust gas by the first packing layer 5.

[0027] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0028] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-efficiency bio-trickling filter for low-concentration VOCs waste gas, comprising a trickling filter shell (1), characterized in that, A water pump (2) is fixedly connected to the bottom end of the outer shell (1) of the trickling filter tower. A first delivery pipe (3) is fixedly connected to one end of the water pump (2). Several second delivery pipes (4) are fixedly connected to one side of the first delivery pipe (3). A first packing layer (5), a second packing layer (6), and a third packing layer (7) are fixedly connected to the inner wall of the outer shell (1) from top to bottom. Several second delivery pipes (4) are interleaved with the first packing layer (5), the second packing layer (6), and the third packing layer (7). The first packing layer (5) is a cylinder, the second packing layer (6) includes a cylinder and a cone, the bottom end of the cylinder is fixedly connected to the top end of the cone, the third packing layer (7) is a hollow cone, the bottom end of the trickling filter shell (1) is fixedly connected to an air inlet pipe (16), the top end of the trickling filter shell (1) is fixedly connected to an air outlet pipe (17), the air inlet pipe (16) is located above the water pump (2), and the third packing layer (7) is located above the air inlet pipe (16).

2. The high-efficiency bio-trickling filter for low-concentration VOCs waste gas according to claim 1, characterized in that, The first delivery pipe (3) is an inverted U-shaped pipe. One end of the first delivery pipe (3) is fixedly connected to the water pump (2), and the other end of the first delivery pipe (3) is fixedly connected to the second delivery pipe (4).

3. The high-efficiency bio-trickling filter for low-concentration VOCs waste gas according to claim 1, characterized in that, The outer wall of the trickling filter shell (1) is fixedly connected to a connecting frame, which is fixedly connected to the first delivery pipe (3).

4. The high-efficiency bio-trickling filter for low-concentration VOCs waste gas according to claim 1, characterized in that, A baffle (15) is fixedly connected to the inner wall of the trickling filter shell (1). The air inlet pipe (16) is an L-shaped pipe. One end of the air inlet pipe (16) extends to the middle of the inner cavity of the trickling filter shell (1). The end of the air inlet pipe (16) inside the trickling filter shell (1) bends upward. The baffle (15) is located between the air inlet pipe (16) and the third packing layer (7). The baffle (15) includes a baffle plate and several fixed rods. The baffle plate and several fixed rods are fixedly connected. Several of the fixed rods are fixedly connected to the trickling filter shell (1). The baffle (15) is located at the upper end of the air inlet pipe (16). The baffle plate is umbrella-shaped. The top end of the air inlet pipe (16) is located inside the baffle plate.

5. The high-efficiency bio-trickling filter for low-concentration VOCs waste gas according to claim 1, characterized in that, The inner wall of the outer shell (1) of the trickling filter tower is fixedly connected to several fixed frames (8). A rotating hole (9) is opened in the middle of the fixed frame (8). A rotating ring (10) is rotatably connected in the middle of the rotating hole (9). A connecting cylinder (11) is fixedly connected to the inner wall of the rotating ring (10). Two limiting rings (12) are fixedly connected to the lower end of the second conveying pipe (4). The connecting cylinder (11) is sleeved between the two limiting rings (12). Several connecting pipes (13) are fixedly connected to the bottom end of the connecting cylinder (11). A spraying pipe (14) is fixedly connected to the lower end of the connecting pipe (13).

6. The high-efficiency bio-trickling filter for low-concentration VOCs waste gas according to claim 5, characterized in that, The fixing frame (8) includes a fixing block and several connecting rods. The fixing block and several connecting rods are fixedly connected. Several connecting rods are fixedly connected to the outer shell (1) of the trickling filter tower. The fixing block is located on the longitudinal central axis of the outer shell (1) of the trickling filter tower.

7. The high-efficiency bio-trickling filter for low-concentration VOCs waste gas according to claim 5, characterized in that, The rotating hole (9) is a cross-shaped hole. Both ends of the connecting cylinder (11) pass through the rotating hole (9) to the outside of the fixing frame (8). The rotating ring (10) and the connecting cylinder (11) form a cross shape. The connecting cylinder (11) and the rotating ring (10) are rotatably connected in the rotating hole (9).

8. The high-efficiency bio-trickling filter for low-concentration VOCs waste gas according to claim 5, characterized in that, The spray pipe (14) is an annular pipe, and several water spray pipes are fixedly connected to the bottom end of the spray pipe (14). The several water spray pipes are located in the middle above the first filler layer (5).

Images