Sludge drying and deodorizing system

Abstract

The utility model discloses a sludge drying and deodorizing system which comprises a plate-and-frame filter press, a gas-liquid discharge structure and a filtrate treatment device, the gas-liquid discharge structure comprises an exhaust device and a drainage device, the exhaust device is arranged above the plate-and-frame filter press and is connected with the filtrate treatment device, and the drainage device is arranged above the plate-and-frame filter press and is connected with the plate-and-frame filter press. The drainage device is mounted at the bottom of the plate-and-frame filter press, and an outlet of the drainage device is connected to the filtrate treatment device, so that the sludge dewatering efficiency is improved, the water content of a filter cake is reduced, and the subsequent transportation and treatment cost is reduced; the surrounding environment and the health condition of workers are improved, and favorable help is provided for efficient and environment-friendly treatment of municipal sludge.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment equipment, in particular to a sludge drying and deodorizing system. Background Art

[0002] Municipal sludge contains a large amount of water, organic matter, heavy metals and pathogenic microorganisms. If it is not effectively treated, it will not only occupy a large amount of land resources, but may also pose a serious threat to the environment and human health. Therefore, the effective treatment and disposal of sludge has become an important issue that needs to be urgently addressed in the current environmental protection field.

[0003] During the sludge treatment process, the moisture content of the sludge directly affects the efficiency, effect and cost of its subsequent disposal. my country's mainstream sludge disposal methods, such as landfill, incineration, land utilization, etc., all have strict requirements on the moisture content of sludge. Sludge drying is a key step in achieving sludge reduction. By reducing the moisture content in the sludge, it can significantly reduce the volume of the sludge, facilitate subsequent transportation and disposal, and at the same time improve the resource utilization value of the sludge.

[0004] As one of the commonly used solid-liquid separation equipment, the plate and frame filter press plays an important role in sludge dewatering treatment. However, in actual applications, traditional plate and frame filter presses often face problems such as poor solid-liquid separation effect and high moisture content of the filter cake, which leads to increased subsequent sludge transportation and disposal costs. In addition, the odorous gas released by the sludge during the dehydration process is also one of the environmental problems that need to be solved urgently, which has an adverse impact on the surrounding environment and the health of workers.

[0005] Therefore, a sludge drying and deodorization system is proposed to solve the above technical problems. Utility Model Content

[0006] The purpose of the utility model is to solve the above-mentioned technical problems and provide a sludge drying and deodorization system. The utility model improves the sludge dewatering efficiency, reduces the moisture content of the filter cake, and reduces the subsequent transportation and disposal costs. At the same time, the negative pressure generated by the flow of the Venturi tube effectively extracts the sludge odor and residual filtrate, improves the surrounding environment and the health of the staff, and provides favorable assistance for the efficient and environmentally friendly treatment of municipal sludge.

[0007] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a sludge drying and deodorization system, including a plate and frame filter press, a gas-liquid discharge structure and a filtrate treatment device, the gas-liquid discharge structure including an exhaust device and a drainage device, the exhaust device is installed above the plate and frame filter press, the exhaust device is connected to the filtrate treatment device, the drainage device is installed at the bottom of the plate and frame filter press, and the outlet of the drainage device is connected to the filtrate treatment device.

[0008] Preferably, the exhaust device includes an exhaust vacuum pipe, an exhaust vacuum valve and an air collecting hood, the air collecting hood covers the plate and frame filter press, the exhaust vacuum valve is connected to the air collecting hood, the exhaust vacuum valve is connected to the filtrate treatment device, and the exhaust vacuum valve and the air collecting hood are both installed on the exhaust vacuum pipe.

[0009] Preferably, the drainage device includes a drainage vacuum pipe, a drainage vacuum valve and a vacuum buffer tank. The vacuum buffer tank is installed between the drainage vacuum valve and the plate and frame filter press. The drainage vacuum valve is connected to the filtrate treatment device. The drainage vacuum valve and the vacuum buffer tank are both installed on the drainage vacuum pipe.

[0010] Preferably, the vacuum buffer tank includes a vacuum buffer drain valve, which is installed on the vacuum buffer tank and discharges sewage to the filtrate treatment device.

[0011] Preferably, the drainage device further comprises a main drainage valve, which is installed between the plate and frame filter press and the vacuum buffer tank for discharging main filtered water of the plate and frame filter press.

[0012] Preferably, the filtrate treatment device includes a filtrate tank and a filtrate transport pipeline, the filtrate transport pipeline is connected to the filtrate tank, and the filtrate transport pipeline is connected to the drainage vacuum pipe and the exhaust vacuum pipe.

[0013] Preferably, a filtrate delivery pump is provided on the filtrate transport pipeline, and the filtrate delivery pump is installed at the water outlet of the filtrate tank to deliver the filtrate to the raw water treatment tank.

[0014] Preferably, a venturi tube is further provided on the filtrate transport pipeline, and the venturi tube is connected to the drainage vacuum pipe and the exhaust vacuum pipe to suck out the filtrate and odor through negative pressure.

[0015] The beneficial effects of the utility model are:

[0016] 1. The use of exhaust and drainage devices effectively improves the dehydration efficiency of sludge, significantly reduces the moisture content of filter cakes, and reduces the cost of subsequent transportation and disposal. The exhaust device is designed to cover the plate and frame filter press, timely collecting and discharging the odor generated during the sludge dehydration process, effectively improving the working environment and surrounding air quality;

[0017] 2. The setting of filtrate treatment equipment, including filtrate tank and filtrate transport pipeline, as well as the application of filtrate delivery pump and Venturi tube, further enhances the filtrate treatment capacity and ensures that the filtrate is effectively treated and discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall connection structure of the utility model.

[0019] In the figure: 1. Plate and frame filter press, 2. Gas-liquid discharge structure, 21. Exhaust device, 211. Exhaust vacuum tube, 212. Exhaust vacuum valve, 213. Gas collecting hood, 22. Drainage device, 221. Drainage vacuum tube, 222. Drainage vacuum valve, 223. Vacuum buffer tank, 2231. Vacuum buffer drain valve, 224. Main drain valve, 3. Filtrate treatment device, 31. Filtrate tank, 32. Filtrate transport pipeline, 33. Filtrate delivery pump, 34. Venturi tube. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] like Figure 1 As shown, the utility model provides a sludge drying and deodorization system, including a plate and frame filter press 1, a gas-liquid discharge structure 2 and a filtrate treatment device 3. The gas-liquid discharge structure 2 includes an exhaust device 21 and a drainage device 22. The exhaust device 21 is installed above the plate and frame filter press 1, and the exhaust device 21 is connected to the filtrate treatment device 3. The drainage device 22 is installed at the bottom of the plate and frame filter press 1, and the outlet of the drainage device 22 is connected to the filtrate treatment device 3.

[0022] By adopting the above technical solution, the coordinated use of the exhaust device 21 and the drainage device 22 helps to more effectively separate the moisture in the sludge during the operation of the plate and frame filter press 1, thereby improving the dehydration efficiency of the sludge and reducing the moisture content of the filter cake. The exhaust device 21 is installed above the plate and frame filter press 1, and can timely collect and discharge the odor generated during the sludge dehydration process, and treat it through the filtrate treatment device 3 to effectively prevent the spread of odor, improve the working environment and the surrounding air quality. The setting of the filtrate treatment device 3 enables the filtrate discharged from the plate and frame filter press 1 to be stored in a timely and effective manner, which helps to reduce the pollution of the filtrate to the environment and improve the recovery rate of the filtrate.

[0023] The exhaust device 21 includes an exhaust vacuum tube 211, an exhaust vacuum valve 212 and an air collecting hood 213. The air collecting hood 213 covers the plate and frame filter press 1. The exhaust vacuum valve 212 is connected to the air collecting hood 213. The exhaust vacuum valve 212 is connected to the filtrate treatment device 3. The exhaust vacuum valve 212 and the air collecting hood 213 are both installed on the exhaust vacuum tube 211.

[0024] By adopting the above technical solution, the gas collecting hood 213 covers the plate and frame filter press 1, which can comprehensively and effectively collect the odor generated during the sludge dehydration process and prevent it from spreading to the working environment and surrounding air. The exhaust vacuum tube 211 and the exhaust vacuum valve 212 allow the odor collected in the gas collecting hood 213 to smoothly enter the filtrate through the Venturi tube 34, and then be further processed and purified along with the filtrate to the raw water pool.

[0025] The drainage device 22 includes a drainage vacuum pipe 221, a drainage vacuum valve 222 and a vacuum buffer tank 223. The vacuum buffer tank 223 is installed between the drainage vacuum valve 222 and the plate and frame filter press 1. The drainage vacuum valve 222 is connected to the filtrate treatment device 3. The drainage vacuum valve 222 and the vacuum buffer tank 223 are both installed on the drainage vacuum pipe 221.

[0026] By adopting the above technical solution, the vacuum buffer tank 223 is installed between the drainage vacuum valve 222 and the plate and frame filter press 1, which plays a buffering role and can alleviate the pressure fluctuations during the negative pressure suction drainage process, making the drainage process smoother.

[0027] The drainage device 22 further includes a main drainage valve 224 , which is installed between the plate and frame filter press 1 and the vacuum buffer tank 223 for discharging filtered water from the initial normal filtration of the plate and frame filter press 1 .

[0028] The vacuum buffer tank 223 includes a vacuum buffer drain valve 2231 , which is installed on the vacuum buffer tank 223 . After negative pressure suction and drainage is completed, the vacuum buffer drain valve 2231 discharges sewage to the filtrate treatment device 3 .

[0029] By adopting the above technical solution, the vacuum buffer drain valve 2231 is installed on the vacuum buffer tank 223, and the main drain valve 224 is installed between the plate and frame filter press 1 and the vacuum buffer tank 223. This can control the time of sewage discharge, flexibly adjust the drainage process according to system requirements, and ensure the stability of the vacuum degree brought by the Venturi tube suction.

[0030] By adopting the above technical solution, the main drain valve 224 is cleverly installed at the connection between the plate and frame filter press 1 and the vacuum buffer tank 223. Its main function is to discharge the main filtered water generated by the plate and frame filter press 1 during the normal filtration process, ensuring that the filtered water can be discharged from the system smoothly and quickly.

[0031] The filtrate treatment device 3 includes a filtrate pool 31 and a filtrate transport pipeline 32 . The filtrate transport pipeline 32 is connected to the filtrate pool 31 . The filtrate transport pipeline 32 is connected to the drainage vacuum pipe 221 and the exhaust vacuum pipe 211 .

[0032] By adopting the above-mentioned technical solution, filtrate transport pipeline 32 connects filtrate tank 31, drainage vacuum pipe 221, and exhaust vacuum pipe 211, achieving efficient filtrate transportation within the system. During normal filter pressing and drainage, filtrate enters filtrate tank 31 through drainage vacuum pipe 221. Simultaneously, a small amount of filtrate is produced during the venturi tube suction process and is discharged into filtrate tank 31 through vacuum buffer drain valve 2231. Malodor generated during the suction process enters the filtrate transport pipeline corresponding to venturi tube 34 through exhaust vacuum pipe 211 and is ultimately transported to the raw water treatment tank. This ensures the smooth flow of filtrate and odor throughout the system and prevents accumulation and leakage of filtrate and odor.

[0033] A filtrate delivery pump 33 is provided on the filtrate transport pipeline 32 . The filtrate delivery pump 33 is installed at the water outlet of the filtrate tank 31 to deliver the filtrate to the water treatment raw water tank.

[0034] A venturi tube 34 is also provided on the filtrate transport pipeline 32. The venturi tube 34 is connected to the drainage vacuum tube 221 and the exhaust vacuum tube 211 to carry out the filtrate and odor through negative pressure suction.

[0035] By adopting the above technical solution, the Venturi tube 34 utilizes the Venturi effect to generate local negative pressure through the change of gas flow rate in the pipeline, thereby effectively collecting the filtrate that may be brought out during the negative pressure suction process. It can not only prevent the filtrate from being directly sucked back into the vacuum pump or other key equipment, causing equipment damage or reduced processing efficiency, but also ensure that the filtrate is safely and reliably collected and transported to subsequent processing links. At the same time, the negative pressure generated by the flow of the Venturi tube can effectively extract the sludge odor and residual filtrate in the plate and frame filter press 1, thereby improving the processing efficiency.

[0036] During the specific implementation of the present invention, ensure that the plate and frame filter press 1, the gas-liquid discharge structure 2 and the filtrate treatment device 3 are all in normal condition, and check whether all valves, pumps and pipelines are tightly connected and leak-free;

[0037] Open the exhaust vacuum valve 212, start the gas collecting hood 213, start to suck the odor generated by the operation of the plate and frame filter press 1, close the drain vacuum valve 222, open the vacuum buffer drain valve 2231 and the main drain valve 224, and the plate and frame filter press 1 starts to operate normally. The filtrate is discharged into the filtrate tank 31 through the drainage device 22;

[0038] When the plate and frame filter press 1 has completed normal filtration and the water output has decreased, the vacuum buffer drain valve 2231 and the main drain valve 224 are closed, the drain vacuum valve 222 is opened, and the exhaust vacuum valve 212 is closed to start negative pressure filtration of the plate and frame filter press 1. The filtered water is temporarily stored in the vacuum buffer tank 223.

[0039] After the negative pressure filtration is completed, the drain vacuum valve 222 is closed, the vacuum buffer drain valve 2231 and the main drain valve 224 are opened, the water filtered out by the negative pressure is discharged into the filtrate pool 31, and the exhaust vacuum valve 212 is opened to prepare for the negative pressure filtration of the odor generated when the plate and frame filter press 1 is discharged;

[0040] The plate and frame filter press 1 starts to discharge mud, and at the same time, the gas collecting hood 213 continues to suck the odor generated during the mud discharge process. The filtrate and the odor are discharged into the filtrate treatment device 3 through the gas-liquid discharge structure 2 for treatment. After the mud discharge is completed, all valves and pumps are closed.

[0041] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to in detail.

[0042] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sludge drying and deodorization system, characterized by: The invention comprises a plate-frame filter press (1), a gas-liquid discharge structure (2) and a filtrate treatment device (3); the gas-liquid discharge structure (2) comprises an exhaust device (21) and a drainage device (22); the exhaust device (21) is installed above the plate-frame filter press (1) and is connected to the filtrate treatment device (3); the drainage device (22) is installed at the bottom of the plate-frame filter press (1), and the outlet of the drainage device (22) is connected to the filtrate treatment device (3).

2. The sludge drying and deodorization system according to claim 1, characterized in that: The exhaust device (21) comprises an exhaust vacuum pipe (211), an exhaust vacuum valve (212) and an air collecting hood (213); the air collecting hood (213) covers the plate and frame filter press (1); the exhaust vacuum valve (212) is connected to the air collecting hood (213); the exhaust vacuum valve (212) is connected to the filtrate treatment device (3); and the exhaust vacuum valve (212) and the air collecting hood (213) are both mounted on the exhaust vacuum pipe (211).

3. The sludge drying and deodorization system according to claim 1, characterized in that: The drainage device (22) comprises a drainage vacuum pipe (221), a drainage vacuum valve (222) and a vacuum buffer tank (223); the vacuum buffer tank (223) is installed between the drainage vacuum valve (222) and the plate and frame filter press (1); the drainage vacuum valve (222) is connected to the filtrate treatment device (3); and the drainage vacuum valve (222) and the vacuum buffer tank (223) are both installed on the drainage vacuum pipe (221).

4. The sludge drying and deodorization system according to claim 3, characterized in that: The vacuum buffer tank (223) includes a vacuum buffer drain valve (2231), which is installed on the vacuum buffer tank (223). The vacuum buffer drain valve (2231) drains sewage to a filtrate treatment device.

5. The sludge drying and deodorization system according to claim 3, characterized in that: The drainage device (22) further comprises a main drainage valve (224), which is installed between the plate and frame filter press (1) and the vacuum buffer tank (223) for discharging main filtered water of the plate and frame filter press (1).

6. The sludge drying and deodorization system according to claim 2 or 3, characterized in that: The filtrate treatment device (3) comprises a filtrate pool (31) and a filtrate transport pipeline (32), wherein the filtrate transport pipeline (32) is connected to the filtrate pool (31), and the filtrate transport pipeline (32) is connected to a drainage vacuum pipe (221) and an exhaust vacuum pipe (211).

7. The sludge drying and deodorization system according to claim 6, characterized in that: The filtrate transport pipeline (32) is provided with a filtrate delivery pump (33), which is installed at the outlet of the filtrate tank (31) to deliver the filtrate to the raw water tank for treatment.

8. The sludge drying and deodorization system according to claim 6, characterized in that: The filtrate transport pipeline (32) is further provided with a venturi tube (34), which is connected to the drainage vacuum tube (221) and the exhaust vacuum tube (211) to suck out the filtrate and odor through negative pressure.

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