A highly sealed sludge thickening tank

Abstract

This utility model discloses a highly sealed sludge thickening tank, relating to the field of sludge thickening technology. It includes a thickening tank fixed to a support frame, with a top cover. A maintenance platform is fixed to the top cover. A stirring motor is fixed to the maintenance platform, its output shaft extending through the top cover and into the thickening tank. A stirring paddle is mounted on the output shaft of the stirring motor. The top cover has a sludge pipe, a chemical dosing pipe, and a negative pressure pipe. A PVDF membrane is bonded to the top of the top cover. The bottom of the top cover has an inner lining that is fitted into the inner side of the upper port of the thickening tank. This utility model uses a steel strip to seal the gaps after fastening the top cover to the top of the thickening tank, preventing the escape of sludge odor from the thickening tank and thus preventing environmental pollution. The negative pressure pipe extracts the odor from the thickening tank, which is then purified by a gas purification device to prevent odor pollution of the air.

Description

Technical Field

[0001] This utility model specifically relates to the field of sludge thickening technology, and more specifically to a highly sealed sludge thickening tank. Background Technology

[0002] Sludge thickening tanks are key facilities in wastewater treatment plants used to reduce the water content of sludge and lower the load on subsequent treatment processes. Their core function is to use physical or mechanical methods to cause solid particles in the sludge to settle and aggregate, thereby achieving sludge-water separation and increasing sludge concentration.

[0003] Chinese Patent Application No. 202122226046.3 discloses a physicochemical sludge thickening tank for wastewater treatment, including a sludge thickening tank, a sludge scraping mechanism at the bottom of the tank, and a sludge dewatering device. The top of the sludge thickening tank is provided with a base frame that runs through the opening of the sludge thickening tank, and the side wall of the sludge thickening tank is also provided with an outlet. The sludge scraping mechanism at the bottom of the tank is provided with a scraper rake that can rotate along the axial direction of the sludge thickening tank.

[0004] The thickening tank in the aforementioned patent is a commonly used and common thickening tank; the sludge in the tank emits an odor, and the area has a strong smell, affecting the factory environment; the added top cover is exposed to wind and sun for a long time, causing the equipment to age severely and have a short service life. Utility Model Content

[0005] The purpose of this utility model is to provide a highly sealed sludge thickening tank, which has a high sealing effect, prevents odors from spreading from the thickening tank, and ensures that the environment within the plant area is not polluted, thereby solving the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A highly sealed sludge thickening tank, including

[0008] A thickening tank for sludge thickening is fixed on a support frame and has a top cover. A maintenance platform is fixed on the top cover. A stirring motor is fixed on the maintenance platform. The output shaft of the stirring motor extends through the top cover and into the thickening tank. An agitator is installed on the output shaft of the stirring motor.

[0009] The top cover is equipped with a sludge pipe, a chemical dosing pipe, and a negative pressure pipe;

[0010] The top of the top cover is bonded with a PVDF membrane; the bottom of the top cover has an inner liner and is fitted into the inner side of the upper port of the concentration tank.

[0011] A steel strip is provided on the outside of the gap where the top cover and the thickening tank are connected, and the steel strip is fixed to the top cover by rivets.

[0012] As a further technical solution of this utility model, a flushing cylinder is sleeved on the outside of the rotating shaft of the stirring paddle, and the flushing cylinder is connected to the backwash tank through a pipe; the backwash tank is fixed to one side of the thickening tank by a mounting bracket.

[0013] As a further technical solution of this utility model, the bottom of the thickening tank has a sewage discharge pipe; the middle position of the sewage discharge pipe is connected to the sludge pump through a three-way pipe, and a pneumatic valve is connected in series at the lower end of the sewage discharge pipe; the sludge pump is fixed on the mounting frame.

[0014] As a further technical solution of this utility model, the inspection platform is provided with a protective canopy, which is located on the stirring motor.

[0015] As a further technical solution of this utility model, a maintenance ladder is provided on one side of the thickening tank; the maintenance ladder is fixed on the steel frame, and the upper end of the maintenance ladder is connected to the maintenance platform.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. In this utility model, the top cover is fastened to the top of the thickening tank, and then the gaps are sealed with steel strips. This can prevent the escape of sludge odor from the thickening tank and prevent environmental pollution. One end of the negative pressure pipe is connected to the top cover, and the other end is connected to the gas purification device to extract the odor from the thickening tank and then purify it through the gas purification device to avoid odor pollution of the air.

[0018] 2. In this utility model, the sludge in the thickening tank will naturally settle under gravity. If left to stand for a long time, the sludge at the bottom is prone to agglomeration and formation of sludge cakes or "mud cakes", which will cause blockage of the sewage pipe and make it difficult to discharge. The stirring motor drives the stirring paddle to stir the sludge, which can keep the sludge particles in a suspended state, prevent local deposition and agglomeration, ensure uniform sludge concentration in the tank, and facilitate subsequent stable sludge discharge. The sludge pump can send the sludge in the thickening tank to the filter press for sludge treatment.

[0019] 3. In this invention, the backwash tank is a compression tank. By opening the valve on the pipe connected to the flushing cylinder, water flows into the flushing cylinder under the pressure of the backwash tank itself, which can flush the agitator. The continuous rotation of the agitator also cleans the inner wall of the concentration tank. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This utility model Figure 1 Another perspective illustration.

[0022] Figure 3This utility model Figure 2 A schematic diagram of the bottom side structure.

[0023] Figure 4 This utility model Figure 1 A schematic diagram of the internal structure.

[0024] Figure 5 This utility model Figure 1 A magnified view of a portion of the image.

[0025] Figure 6 This utility model Figure 3 A magnified view of a portion of the image.

[0026] In the diagram: 1-Thickening tank, 2-Support body, 3-Top cover, 4-Maintenance platform, 5-Agitator motor, 6-Protective canopy, 7-Sludge pipe, 8-Dosing pipe, 9-Negative pressure pipe, 10-Backwash tank, 11-Maintenance ladder, 12-Steel frame, 13-Sludge pump, 14-Sewage pipe, 15-Agitator, 16-PVDF membrane, 17-Steel belt. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-6 In this embodiment of the invention, a highly sealed sludge thickening tank includes...

[0029] Thickening tank 1, used for sludge thickening, is fixed on support body 2, and a top cover 3 is provided on the top of thickening tank 1; a maintenance platform 4 is fixed on the top cover 3; a stirring motor 5 is fixed on the maintenance platform 4, and the output shaft of the stirring motor 5 extends through the top cover 3 and into the thickening tank 1; and a stirring paddle 15 is installed on the output shaft of the stirring motor 5; the sludge in the thickening tank 1 will naturally settle under the action of gravity. If left to stand for a long time, the sludge at the bottom is prone to form caking or "sludge cake" due to particle aggregation, which will cause blockage of the sewage pipe 14 and make it difficult to discharge; the stirring motor 5 drives the stirring paddle 15 to stir the sludge, which can keep the sludge particles in a suspended state, prevent local deposition and agglomeration, ensure uniform sludge concentration in the tank, and facilitate subsequent stable sludge discharge.

[0030] The top cover 3 is equipped with a sludge pipe 7, a chemical dosing pipe 8, and a negative pressure pipe 9. Since conventional thickening tanks lack heating or insulation functions, low temperatures reduce sludge particle activity and settling velocity, resulting in poor flowability for high-viscosity sludge (such as sludge containing grease or high colloid content). Chemical dosing can break down colloidal stability, improve sludge flowability, and ensure stable thickening effects. Therefore, we have installed a chemical dosing pipe 8 to add chemicals to the thickening tank 1, thereby ensuring the flowability of high-viscosity sludge.

[0031] In this embodiment, a PVDF membrane 16 is bonded to the top of the top cover 3; the bottom of the top cover 3 has an inner liner and is fitted into the inner side of the upper port of the concentration tank 1.

[0032] A steel strip 17 is provided on the outside of the gap where the top cover 3 and the thickening tank 1 are engaged, and the steel strip 17 is fixed to the top cover by rivets.

[0033] By adopting the above technical solution, the top cover 3 is fastened to the top of the thickening tank 1, and then the gap is sealed with steel strip 17. This can prevent the escape of sludge odor from the thickening tank 1 and prevent environmental pollution.

[0034] PVDF membrane 16 is a high-performance polymer membrane with excellent resistance to strong acids, strong alkalis, and organic solvents. It can withstand long-term operating temperatures from -40℃ to 150℃ and can withstand even higher temperatures in the short term. It can resist ultraviolet rays, ozone, and various radiations, making it suitable for outdoor or harsh environments.

[0035] By setting a PVDF film 16 on the top cover 3, the top cover 3 can be protected, avoiding oxidation, aging and other problems caused by long-term exposure to sunlight.

[0036] More specifically, the negative pressure pipe 9 is also connected to a gas purification device to extract the odor from the concentration tank 1 and then purify it through the gas purification device to prevent odor from polluting the air.

[0037] In this embodiment, a flushing cylinder is sleeved on the outside of the rotating shaft of the stirring paddle 15, and the flushing cylinder is connected to the backwash tank 10 through a pipe; the backwash tank 10 is fixed to one side of the thickening tank 1 by a mounting bracket.

[0038] More specifically, the backwash tank 10 is a compression tank. When the valve on the pipe connected to the flushing cylinder is opened, water flows into the flushing cylinder under the pressure of the backwash tank 10 itself, which can flush the agitator 15. With the continuous rotation of the agitator 15, the inner wall of the thickening tank 1 can also be cleaned.

[0039] In this embodiment, the bottom of the thickening tank 1 has a sewage pipe 14; the middle position of the sewage pipe 14 is connected to the sludge pump 13 through a three-way pipe, and a pneumatic valve is connected in series at the lower end of the sewage pipe 14; the sludge pump 13 is fixed on the mounting frame.

[0040] By adopting the above technical solution, the sludge pump 13 can send the sludge in the thickening tank 1 to the filter press for sludge treatment; during backwashing, if the sludge pump 13 is not started, the pneumatic valve can be opened directly to discharge the backwash water.

[0041] In this embodiment, the inspection platform 4 is equipped with a protective canopy 6, which is located on the stirring motor 5. The protective canopy 6 provides sun and rain protection for the stirring motor 5, reducing damage to the stirring motor 5 caused by the external environment.

[0042] In this embodiment, a maintenance ladder 11 is provided on one side of the thickening tank 1; the maintenance ladder 11 is fixed on the steel frame 12, and the upper end of the maintenance ladder 11 is connected to the maintenance platform 4.

[0043] The working principle of this utility model is as follows: the top cover 3 is fastened to the top of the thickening tank 1, and then the gap is sealed with steel strip 17. This can prevent the sludge odor in the thickening tank 1 from escaping and prevent environmental pollution. One end of the negative pressure pipe 9 is connected to the top cover 3, and the other end is connected to the gas purification device to extract the odor in the thickening tank 1 and then purify it through the gas purification device to avoid odor pollution of the air.

[0044] The sludge in the thickening tank 1 will naturally settle under gravity. If left to stand for a long time, the sludge at the bottom is prone to caking or forming "sludge cakes" due to particle aggregation, which will cause blockage of the sewage pipe 14 and make it difficult to discharge. The stirring motor 5 drives the stirring paddle 15 to stir the sludge, which can keep the sludge particles in a suspended state, prevent local deposition and agglomeration, ensure uniform sludge concentration in the tank, and facilitate subsequent stable sludge discharge. The sludge pump 13 can send the sludge in the thickening tank 1 to the filter press for sludge treatment.

[0045] The backwash tank 10 is a compression tank. When the valve on the pipe connected to the flushing cylinder is opened, water will flow into the flushing cylinder under the pressure of the backwash tank 10 itself, which can flush the agitator 15. With the continuous rotation of the agitator 15, the inner wall of the thickener 1 can also be cleaned.

[0046] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0047] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high sealability sludge concentration tank characterized by: include Thickening tank (1), which is used for sludge thickening, is fixed on the support body (2), and the top of the thickening tank (1) is provided with a top cover (3); a maintenance platform (4) is fixed on the top cover (3); a stirring motor (5) is fixed on the maintenance platform (4), the output shaft of the stirring motor (5) extends through the top cover (3) and into the thickening tank (1); and a stirring paddle (15) is installed on the output shaft of the stirring motor (5). The top cover (3) is equipped with a sludge pipe (7), a chemical dosing pipe (8) and a negative pressure pipe (9); The top of the top cover (3) is bonded with a PVDF membrane (16); the bottom of the top cover (3) has an inner liner and is fitted into the inner side of the upper port of the concentration tank (1); A steel strip (17) is provided on the outside of the gap where the top cover (3) and the thickening tank (1) are engaged, and the steel strip (17) is fixed to the top cover by rivets.

2. The high-seal integrity sludge concentration tank of claim 1, wherein: The outside of the rotating shaft of the stirring paddle (15) is fitted with a flushing cylinder, which is connected to the backwash tank (10) through a pipe; the backwash tank (10) is fixed to one side of the thickening tank (1) by a mounting bracket.

3. The high-seal integrity sludge concentration tank of claim 1, wherein: The thickening tank (1) has a drain pipe (14) at the bottom; the drain pipe (14) is connected to the sludge pump (13) through a three-way pipe in the middle, and a pneumatic valve is connected in series at the lower end of the drain pipe (14); the sludge pump (13) is fixed on the mounting frame.

4. The high-seal integrity sludge concentration tank of claim 1, wherein: The inspection platform (4) is equipped with a protective canopy (6), which is located on the stirring motor (5).

5. The high-sealing sludge thickening tank according to claim 1, characterized in that: The thickening tank (1) is provided with a maintenance ladder (11) on one side; the maintenance ladder (11) is fixed on the steel frame (12), and the upper end of the maintenance ladder (11) is connected to the maintenance platform (4).

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