A sludge pretreatment negative pressure deodorization system

Abstract

This utility model discloses a sludge pretreatment negative pressure deodorization system, including a sludge tank and a deodorization tower. A cover plate is installed on the upper part of the sludge tank. A variable frequency negative pressure fan is installed at the air inlet end of the deodorization tower, with the air inlet end of the fan extending into the cover plate. Two sets of staggered limiting baffles are installed inside the deodorization tower, positioned between the air inlet and outlet ends. An air outlet pipe is installed at the air outlet end of the deodorization tower. The two sets of limiting baffles form an S-shaped deodorization chamber within the deodorization tower. The beneficial effect of this utility model is that by setting an S-shaped deodorization chamber within the deodorization tower, the residence time of the collected odorous gas within the tower can be effectively extended, allowing the collected odorous gas to fully interact with the sprayed chemical solution, thereby improving the deodorization effect of the chemical solution.

Description

Technical Field

[0001] This utility model relates to the field of sludge treatment and deodorization technology, and in particular to a sludge pretreatment negative pressure deodorization system. Background Technology

[0002] Vertical sludge deep pressure filtration dewatering equipment is a type of mechanical dewatering equipment that has gradually emerged in recent years. Compared with common sludge dewatering machines, it has the advantages of simple system, larger single processing capacity, lower operating cost, and high-pressure mechanical vertical extrusion of sludge. Under the conditions of proper selection and dosage of equipment and precise control, the moisture content of the influent sludge is about 80%, and the average moisture content of the effluent sludge can reach 50%-55%. Sludge pretreatment tank is an important part of sludge treatment. Sludge in sludge pretreatment will continuously emit malodorous gases such as hydrogen sulfide (H2S), ammonia (NH3), and volatile organic compounds (VOCs). These substances not only produce unpleasant odors, but may also form acid rain or photochemical smog, polluting the atmospheric environment. Therefore, sludge pretreatment tank is generally equipped with deodorization devices.

[0003] In some existing sludge pretreatment ponds, during the process of collecting odorous gases and treating them through deodorization towers, the collected odorous gases have difficulty coming into full contact with the sprayed deodorizing liquid inside the deodorization tower. As a result, the gas emitted from the deodorization tower still has a certain odor, leading to poor deodorization effect of the deodorization tower. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of some existing sludge pretreatment ponds, where the collected odorous gas is difficult to fully contact with the sprayed deodorizing liquid in the deodorizing tower during the process of collecting odorous gas and treating it, resulting in the gas emitted by the deodorizing tower still having a certain odor and the deodorizing effect of the deodorizing tower being poor. This invention provides a sludge pretreatment negative pressure deodorization system.

[0005] The purpose of this utility model is achieved through the following technical solution: a sludge pretreatment negative pressure deodorization system, including a sludge tank and a deodorization tower, a cover plate is installed on the upper part of the sludge tank, and a variable frequency negative pressure fan is installed at the air inlet end of the deodorization tower, with the air inlet end of the variable frequency negative pressure fan extending into the cover plate.

[0006] The deodorization tower is equipped with two sets of staggered limiting baffles located between the air inlet and outlet ends. An air outlet pipe is installed at the outlet end. The two sets of limiting baffles form an S-shaped deodorization chamber within the tower. A rotatable main pipe is located in the center of the deodorization chamber, with two sets of branch pipes installed on it. Each branch pipe is equipped with a nozzle, and the branch pipes are positioned below the two sets of limiting baffles. This S-shaped deodorization chamber effectively prolongs the residence time of the collected odor within the tower, allowing for thorough contact between the collected odor and the sprayed solution, thus improving the deodorizing effect of the solution.

[0007] A further technical solution involves installing a liquid storage tank at the top of the deodorization tower. A liquid inlet pipe is installed at the inlet end of the storage tank, and a liquid inlet pipe is installed at the outlet end. The inlet end of the main pipe extends outside the deodorization tower and is rotatably connected to the liquid inlet pipe. A motor is installed on the deodorization tower, with a first gear installed at the motor's power output end. A second gear meshing with the first gear is installed on the main pipe. The motor, through the cooperation of the first and second gears, can drive the main pipe to rotate, causing the branch pipes and nozzles on the main pipe to rotate. This further improves the contact effect between the sprayed solution and the odor, thereby further improving the efficiency of odor treatment.

[0008] A further technical solution involves an internal liquid collection chamber within the deodorization tower, located below the deodorization chamber. A water pump is installed on the inner bottom wall of the liquid collection chamber, and the pump's outlet is connected to a storage tank via a return pipe. A drain pipe with a control valve is installed at the bottom of the liquid collection chamber. The liquid collection chamber allows for the collection of sprayed pesticide solution, which can then be pumped back to the storage tank for reuse, thus reducing costs. Furthermore, the drain pipe enables the discharge of the pesticide solution after a period of reuse, preventing the solution from becoming ineffective.

[0009] A further technical solution is to install a filter screen between the deodorization chamber and the liquid collection chamber to filter out some dust particles.

[0010] A further technical solution involves installing a pressure sensor inside the sludge tank. The pressure sensor is connected to the external control center of the variable frequency negative pressure fan. The pressure sensor can monitor the pressure of the volatile odor in the sludge tank, and the external control center can control the air extraction volume of the variable frequency negative pressure fan based on the pressure detected by the pressure sensor, thereby effectively extracting the odor from the sludge tank.

[0011] This invention has the following advantages: By setting an S-shaped deodorization chamber inside the deodorization tower, this invention can effectively extend the residence time of the collected odor in the deodorization tower, thereby allowing the collected odor to fully interact with the sprayed liquid from the nozzles, thus improving the deodorization effect of the liquid. The motor, through the cooperation of the first and second gears, can drive the main pipe to rotate, enabling the branch pipes and nozzles on the main pipe to rotate, further improving the contact effect between the sprayed liquid and the odor, thereby further improving the efficiency of odor treatment. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0013] Figure 2 For the present utility model Figure 1 Enlarged schematic diagram of structure A in the middle;

[0014] In the diagram, 1. Sludge tank; 2. Deodorization tower; 3. Cover plate; 4. Variable frequency negative pressure fan; 5. Deodorization chamber; 6. Limiting baffle; 7. Main pipe; 8. Branch pipe; 9. Nozzle; 10. Air outlet pipe; 11. Liquid storage tank; 12. Liquid filling pipe; 13. Liquid collection chamber; 14. Water pump; 15. Return pipe; 16. Drain pipe; 17. Pressure sensor; 20. Liquid inlet pipe; 21. Motor; 22. First gear; 23. Second gear; 24. Filter screen. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0018] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] like Figures 1-2 As shown, a sludge pretreatment negative pressure deodorization system includes a sludge tank 1 and a deodorization tower 2. A cover plate 3 is installed on the upper part of the sludge tank 1, and a variable frequency negative pressure fan 4 is installed at the air inlet end of the deodorization tower 2. The air inlet end of the variable frequency negative pressure fan 4 extends into the cover plate 3.

[0022] The deodorization tower 2 is equipped with two sets of staggered limiting baffles 6, which are positioned between the air inlet and outlet of the deodorization tower 2. An air outlet pipe 10 is installed at the air outlet of the deodorization tower 2. The two sets of limiting baffles 6 form an S-shaped deodorization chamber 5 within the deodorization tower 2. A rotatable main pipe 7 is located in the middle of the deodorization chamber 5. Two sets of branch pipes 8 are installed on the main pipe 7, and nozzles 9 are installed on both sets of branch pipes 8. The two sets of branch pipes 8 are respectively located below the two sets of limiting baffles 6. By setting up the S-shaped deodorization chamber 5 within the deodorization tower 2, the residence time of the collected odor in the deodorization tower 2 can be effectively extended, thereby allowing the collected odor to fully interact with the chemical solution sprayed by the nozzles 9, thus improving the deodorization effect of the chemical solution on the odor.

[0023] A liquid storage tank 11 is installed on the upper part of the deodorization tower 2. A liquid inlet pipe 12 is installed at the inlet end of the liquid storage tank 11, and a liquid inlet pipe 20 is installed at the outlet end of the liquid storage tank 11. The liquid inlet end of the main pipe 7 extends to the outside of the deodorization tower 2 and is rotatably connected to the liquid inlet pipe 20. A motor 21 is installed on the deodorization tower 2. A first gear 22 is installed at the power output end of the motor 21. A second gear 23 that meshes with the first gear 22 is installed on the main pipe 7. The motor 21 can drive the main pipe 7 to rotate through the cooperation of the first gear 22 and the second gear 23, so that the branch pipe 8 and the nozzle 9 on the main pipe 7 can rotate, thereby further improving the contact effect between the liquid sprayed by the nozzle 9 and the odor, and thus further improving the treatment efficiency of the odor.

[0024] The deodorization tower 2 has a liquid collection chamber 13 located below the deodorization chamber 5. A water pump 14 is installed on the inner bottom wall of the liquid collection chamber 13. The outlet of the water pump 14 is connected to the storage tank 11 through a return pipe 15. A drain pipe 16 is installed at the bottom of the liquid collection chamber 13, and a control valve is installed on the drain pipe 16. The liquid collection chamber 13 can collect the sprayed liquid and return it to the storage tank 11 for reuse through the water pump 14, which helps to reduce costs. At the same time, the drain pipe 16 can discharge the liquid after it has been reused for a period of time, preventing the liquid from becoming ineffective after reuse.

[0025] A filter screen 24 is installed between the deodorization chamber 5 and the liquid collection chamber 13 to filter out some dust particles.

[0026] A pressure sensor 17 is installed inside the sludge tank 1. The pressure sensor 17 is connected to the variable frequency negative pressure fan 4 and the external control center. The pressure sensor 17 can monitor the pressure of the volatile odor in the sludge tank 1. The external control center controls the air extraction volume of the variable frequency negative pressure fan 4 based on the air pressure detected by the pressure sensor 17, thereby effectively extracting the odor in the sludge tank 1.

[0027] The working process of this utility model is as follows: When using this system for deodorization, the variable frequency negative pressure fan 4 first draws the odor from the sludge tank 1 and the cover plate 3 into the deodorization chamber 5, where it flows along the S-shaped deodorization chamber 5. At the same time, the motor 21 drives the main pipe 7 to rotate, causing the nozzles 9 on the main pipe 7 and the branch pipe 8 to rotate and spray the odor, so that the liquid medicine comes into full contact with the odor. The treated gas is finally discharged through the exhaust pipe 10. The sprayed liquid medicine can flow into the collection chamber 13 for collection and reuse. After the liquid medicine is reused for a period of time, it is discharged through the drain pipe 16 to the waste liquid treatment equipment for harmless treatment. New liquid medicine medicine can be added through the storage tank 11.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sludge pre-treatment negative pressure deodorization system comprising a sludge tank (1) and a deodorization tower (2), characterized in that: The sludge tank (1) is equipped with a cover plate (3) on its upper part, and the deodorization tower (2) is equipped with a variable frequency negative pressure fan (4) at its air inlet end, with the air inlet end of the variable frequency negative pressure fan (4) extending into the cover plate (3). The deodorization tower (2) is equipped with two sets of staggered limiting baffles (6). The two sets of limiting baffles (6) are located between the air inlet and air outlet of the deodorization tower (2). The two sets of limiting baffles (6) form an S-shaped deodorization chamber (5) in the deodorization tower (2). A rotatable main pipe (7) is provided in the middle of the deodorization chamber (5). Two sets of branch pipes (8) are installed on the main pipe (7). Spray nozzles (9) are installed on both sets of branch pipes (8). The two sets of branch pipes (8) are respectively located below the two sets of limiting baffles (6).

2. The sludge pretreatment negative pressure deodorization system according to claim 1, characterized in that: The upper part of the deodorization tower (2) is equipped with a liquid storage tank (11), the liquid inlet end of the liquid storage tank (11) is equipped with a liquid addition pipe (12), the liquid outlet end of the liquid storage tank (11) is equipped with a liquid inlet pipe (20), the liquid inlet end of the main pipe (7) extends to the outside of the deodorization tower (2) and is rotatably connected to the liquid inlet pipe (20), the deodorization tower (2) is equipped with a motor (21), the power output end of the motor (21) is equipped with a first gear (22), and the main pipe (7) is equipped with a second gear (23) that meshes with the first gear (22).

3. The sludge pretreatment negative pressure deodorization system according to claim 2, characterized in that: The deodorization tower (2) is provided with a liquid collection chamber (13) inside. The liquid collection chamber (13) is located below the deodorization chamber (5). A water pump (14) is installed on the inner bottom wall of the liquid collection chamber (13). The outlet end of the water pump (14) is connected to the liquid storage tank (11) through the return pipe (15). A drain pipe (16) is installed at the lower part of the liquid collection chamber (13). A control valve is installed on the drain pipe (16).

4. The sludge pretreatment negative pressure deodorization system according to claim 3, characterized in that: A filter screen (24) is installed between the deodorization chamber (5) and the liquid collection chamber (13).

5. The sludge pretreatment negative pressure deodorization system according to claim 1, characterized in that: A pressure sensor (17) is installed in the sludge tank (1), and the pressure sensor (17) is connected to the external control center of the variable frequency negative pressure fan (4).

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