Sludge dewatering device

Abstract

The utility model relates to a sludge dewatering device which comprises a dewatering assembly, a sludge conveying assembly and an air compressor assembly, the dewatering assembly comprises a tank body, a movable filter plate and a fixed filter plate, the movable filter plate and the fixed filter plate are oppositely arranged in the tank body in a spaced mode, and the movable filter plate is arranged above the fixed filter plate. The movable filter plate is movably arranged in the tank body, the moving direction of the movable filter plate is parallel to the vertical direction, the inner space of the tank body is divided into a pneumatic cavity, a filter pressing cavity and a drainage cavity which are sequentially distributed from top to bottom by the movable filter plate and the fixed filter plate, water permeable holes are formed in the fixed filter plate, the air compressor assembly is communicated with the pneumatic cavity, and the filter pressing cavity is communicated with the drainage cavity. The sludge dewatering device provided by the utility model has the advantages that the sludge pressing efficiency is improved, the processing cost can be reduced in practical application, and the economic benefit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment, in particular to a sludge dewatering device. Background Art

[0002] Sewage treatment plays an important role in the environmental protection industry. Sewage treatment first requires filtering the sewage and squeezing and dehydrating the filtered sludge. The dehydrated sludge has lower moisture content and smaller volume, which can not only greatly reduce transportation and treatment costs, but also greatly increase the content of available substances in the concentrated sludge.

[0003] The main process of conventional sludge treatment is to pump the sludge in the sludge tank to the plate and frame filter press by a diaphragm pump for sludge dehydration, but the sludge dehydration efficiency of this treatment method is low. Therefore, it is necessary to invent and research an efficient sludge pressing device to improve the sludge dehydration efficiency and reduce the sludge disposal cost. Utility Model Content

[0004] The main purpose of the utility model is to provide a sludge dewatering device, aiming to provide a sludge dewatering device capable of improving the sludge pressing efficiency.

[0005] To achieve the above-mentioned purpose, the utility model proposes a sludge dewatering device, including a dewatering component, a sludge conveying component and an air compressor component, the dewatering component includes a tank body and a movable filter plate and a fixed filter plate relatively spaced apart in the tank body, the movable filter plate is arranged above the fixed filter plate, the movable filter plate is movably arranged in the tank body and the movable direction is parallel to the vertical direction, the internal space of the tank body is divided by the movable filter plate and the fixed filter plate into a pneumatic chamber, a filter pressure chamber and a drainage chamber distributed in sequence from top to bottom, the fixed filter plate is provided with a water-permeable hole, the air compressor component is connected to the pneumatic chamber, and the mud outlet of the sludge conveying component is connected to the filter pressure chamber.

[0006] According to some embodiments of the present invention, a cleaning assembly is further included, wherein the cleaning assembly includes a water supply unit, and the water supply unit is connected to the tank body through a first pipeline.

[0007] According to some embodiments of the utility model, a cleaning branch pipe is connected to the first pipeline, and the cleaning branch pipe is connected to the drainage port of the drainage cavity.

[0008] According to some embodiments of the utility model, the movable filter plate is wrapped with filter cloth and is provided with water permeable holes.

[0009] According to some embodiments of the utility model, a guiding mechanism for movably guiding the movable filter plate is provided in the tank body.

[0010] According to some embodiments of the present invention, the tank body includes an upper tank body and a lower tank body connected by a detachable connection structure.

[0011] According to some embodiments of the present invention, the detachable connection structure is located between the movable filter plate and the fixed filter plate.

[0012] According to some embodiments of the present utility model, the tank body is connected to a pressure gauge which is in communication with the filter press chamber.

[0013] According to some embodiments of the present utility model, the tank body is connected to a pressure relief valve which is in communication with the pneumatic cavity.

[0014] According to some embodiments of the utility model, the drainage cavity is provided with a drainage outlet, and the drainage outlet is connected to the sewage recovery system through a second pipeline.

[0015] The utility model has at least the following beneficial effects:

[0016] In the utility model, an air compressor assembly is used as a power source, and the pressure in the pneumatic chamber is increased to drive the movable filter plate close to the fixed filter plate, so as to filter the sludge transported to the filter press chamber by the sludge conveying assembly. During the vertical movement of the movable filter plate, the sludge can be evenly spread on the fixed filter plate and then filtered. Compared with the existing form of only using a fixed filter plate and pressurizing for filtering, the sludge will not splash and affect the dehydration effect. Moreover, it is worth mentioning that in the prior art, hydraulic pressure and other mechanical force compression are used to make the gaps between the sludge particles smaller and smaller. After the dehydration reaction has been carried out for a period of time, a dense layer will be formed at the bottom of the mud cake, resulting in a slowdown in the dehydration reaction. Compared with mechanical pressure dehydration, this scheme uses an air compressor assembly for filter pressing. The air pressure will push the mud cake to sink, and the mud cake thickness will be larger, so that the gaps between the bottom mud particles will be larger. At the same time, the airflow will accelerate the outflow of water, and the water will be more easily filtered out through the pores between the particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic structural diagram of a sludge dewatering device provided in an embodiment of the utility model.

[0019] Description of reference numerals:

[0020] 100-sludge dewatering device; 1-dewatering assembly; 11-tank body; 111-pneumatic chamber; 112-filter pressure chamber; 113-drainage chamber; 114-upper tank body; 115-lower tank body; 116-detachable connection structure; 12-movable filter plate; 13-fixed filter plate; 14-guide mechanism; 2-sludge conveying assembly; 3-air compressor assembly; 4-cleaning assembly; 41-water supply unit; 42-three-way valve; 5-first pipeline; 6-cleaning branch pipe; 7-second pipeline; 8-pressure gauge; 9-pressure relief valve; 10-wastewater recovery system. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0024] The utility model provides a sludge dewatering device. Figure 1 The utility model provides a specific embodiment of a sludge dewatering device.

[0025] like Figure 1The utility model embodiment provides a sludge dewatering device 100, comprising a dewatering component 1, a sludge conveying component 2 and an air compressor component 3, the dewatering component 1 comprises a tank body 11 and a movable filter plate 12 and a fixed filter plate 13 relatively spaced apart in the tank body 11, the movable filter plate 13 is arranged above the fixed filter plate 12, the movable filter plate 13 is movably arranged in the tank body 11, and the movable direction is parallel to the vertical direction, the internal space of the tank body 11 is divided by the movable filter plate 12 and the fixed filter plate 13 into a pneumatic chamber 111, a filter press chamber 112 and a drainage chamber 113 distributed from top to bottom in sequence, the movable filter plate 12 is movably arranged relative to the fixed filter plate 13, the fixed filter plate 13 is provided with a water permeable hole, the air compressor component 3 is connected to the pneumatic chamber 111, and the mud outlet of the sludge conveying component 2 is connected to the filter press chamber 112.

[0026] It should be noted that the sludge conveying component 2 is not specifically limited and may be a sludge pump, a diaphragm pump, etc. In this embodiment, a sludge pump with a lower cost is used.

[0027] In the utility model, the air compressor assembly 3 is used as a power source, and the pressure in the pneumatic chamber 111 is increased to drive the movable filter plate 12 close to the fixed filter plate 13, so as to filter the sludge transported to the filter chamber 112 through the sludge conveying assembly 2. During the activity of the movable filter plate 12, the sludge can be evenly spread on the fixed filter plate 13 before filtering. Compared with the existing form of only using the fixed filter plate 13 and pressurizing for filtering, the sludge will not splash and affect the dehydration effect. Moreover, it is worth mentioning that in the prior art, the use of hydraulic pressure and other mechanical force compression will make the gaps between the sludge particles smaller and smaller. After the dehydration reaction is carried out for a period of time, a dense layer will be formed at the bottom of the mud cake, resulting in the slowing down of the dehydration reaction. Compared with mechanical pressure dehydration, this scheme uses the air compressor assembly 3 for filter pressing, and the air pressure will push the mud cake to sink, and the mud cake thickness is larger, so that the gaps between the bottom mud particles will be larger, and water is easier to filter out through the pores between the particles.

[0028] It should be noted that the movable filter plate 12 is wrapped with filter cloth and is provided with water-permeable holes. Part of the high-pressure gas will enter the filter press chamber 112 through the water-permeable holes. However, this part of the gas is very small compared to the overall gas content of the pneumatic chamber 111, and has little effect on the pressure damage of the filter press driven by high pressure. It is worth mentioning that the airflow entering the filter press chamber will accelerate the movement of water molecules and improve the dehydration efficiency. Moreover, due to the influence of high pressure pressing downward and the small pore size of the filter cloth, the sewage removed from the sludge will be prevented from entering the pneumatic chamber 111 through the water-permeable holes of the movable filter plate 12, so as to reduce the amount of sewage flowing into the pneumatic chamber, and under the environment of gravity and high pressure, the sewage will flow back to the filter press chamber 112.

[0029] Preferably, the density of the water-permeable holes on the movable filter plate 12 is smaller than that on the fixed filter plate 13, so that the air pressure damage of the high-pressure driving force can be reduced while ensuring that part of the airflow can enter the filter pressure chamber 112 to accelerate the movement of water molecules, and further prevent sewage from entering the pneumatic chamber 111 and then flowing more into the drainage chamber 113. Similarly, in some embodiments, the aperture of the water-permeable holes on the movable filter plate 12 is smaller than that of the water-permeable holes on the fixed filter plate 13, which also has the aforementioned beneficial effects, and the use of both will have a better dehydration effect on the sludge.

[0030] In some embodiments, a cleaning component 4 is also included, and the cleaning component 4 includes a water supply unit 41. The water supply unit 41 is connected to the tank body 11 through a first pipeline 5. After the filter press is completed, mud and dirt will remain in the filter press chamber 112, which may easily clog the water holes of the filter plate. Therefore, water can be supplied to the entire tank body 11 through the water supply unit 41 to clean the movable filter plate 12 and the fixed filter plate 13.

[0031] In a further step, considering that using external water to clean the fixed filter plate 13 and the movable filter plate 12 will increase the amount of clean water used, making the actual dehydration and water intake of the device less meaningful, it is possible to consider using the water removed from the sludge to clean the fixed filter plate 13 and the movable filter plate 12 to reduce the amount of clean water used. Therefore, in some embodiments, a cleaning branch pipe 6 is connected to the first pipeline 5, and the cleaning branch pipe 6 is connected to the drainage port of the drainage chamber 113. The sewage filtered out can flow to the first through the cleaning branch pipe 6. The pipeline 5 enters the tank body 11 to clean the movable filter plate 12 and the fixed filter plate 13. In order to use clean water to clean the fixed filter plate 13 and the movable filter plate 12 after cleaning them with sewage, preferably, the first pipeline 5 is connected to the cleaning branch pipe 6 through a three-way valve 42. The three-way valve 42 can be used to control the use of the filtered sewage from the cleaning branch pipe 6 for flushing first, and then the clean water of the water supply unit 41 for cleaning. While ensuring the cleaning efficiency, the use of clean water is reduced, which is more environmentally friendly.

[0032] In some embodiments, the tank body 11 is provided with a guide mechanism 14 for guiding the movable filter plate 12. Figure 1As an embodiment of the present invention, it includes but is not limited to: the end of the movable filter plate 12 facing away from the fixed filter plate 13 is connected to a telescopic rod, the telescopic rod is arranged in the tank body, the axial direction of the telescopic rod is parallel to the vertical direction, and in order to further improve the stability of the activity of the movable filter plate, a slide rail compatible with the movable filter plate 12 is provided on the inner wall of the tank body 11, and the movable filter plate 12 slides in cooperation with the slide rail.

[0033] In some embodiments, in order to facilitate the disassembly of the tank body for maintenance, the tank body 11 includes an upper tank body 114 and a lower tank body 115 connected by a detachable connection structure 116. Considering that after the sludge is filtered, a filter cake will be left on the fixed filter plate 13. In order to remove the solid filter cake, in some embodiments, the detachable connection structure 116 is located between the movable filter plate 12 and the fixed filter plate 13. In this way, after the filtration is completed, the lower tank body 115 can be removed by disassembling the detachable connection structure 116, and then the filter cake left on the fixed filter plate 13 can be removed. Preferably, the detachable connection structure 116 is located near the fixed filter plate 13, which can reduce the design volume of the lower tank body 115 and make it more convenient to remove the lower tank body 115. The detachable connection structure 116 includes but is not limited to flange connection, snap connection, etc.

[0034] Specifically, considering safety reasons, in some embodiments, the tank body 11 is connected to a pressure gauge 8 connected to the filter press chamber 112 to monitor the pressure in the tank body 11 in real time to achieve an early warning function.

[0035] Specifically, the tank body 11 is connected to a pressure relief valve 9 which is in communication with the pneumatic chamber 111. After the pressure filtration is completed, the pressure relief valve 9 can be opened to balance the pressure inside and outside the tank body 11. When the pressure is detected to be too high, the pressure can be discharged through the pressure relief valve 9 to avoid safety accidents.

[0036] In some embodiments, the drainage chamber 113 is provided with a drainage outlet, and the drainage chamber 113 is provided with a drainage outlet. The drainage outlet is connected to the sewage recovery system 10 through the second pipeline 7 to perform secondary treatment on the sewage. Preferably, the other end of the cleaning branch pipe 6 connected to the first pipeline 5 is connected to the second pipeline 7, and the cleaning branch pipe 6 and the second pipeline 7 are connected through a three-way valve 42. In this way, part of the filtered sewage can be accurately controlled to pass through the cleaning branch pipe 6 and the first pipeline 5 to clean the dehydration component 1, and part of the filtered sewage can be controlled to flow directly to the sewage recovery system 10, which simplifies the pipeline flow path, avoids the need to control multiple sewage outlets, and makes the operation more convenient.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge dewatering device, characterized in that: It includes a dehydration component, a sludge conveying component and an air compressor component. The dehydration component includes a tank body and a movable filter plate and a fixed filter plate relatively spaced apart in the tank body. The movable filter plate is arranged above the fixed filter plate. The movable filter plate is movably arranged in the tank body and its movable direction is parallel to the vertical direction. The internal space of the tank body is divided by the movable filter plate and the fixed filter plate into a pneumatic chamber, a filter pressure chamber and a drainage chamber distributed from top to bottom in sequence. The fixed filter plate is provided with a water-permeable hole. The air compressor component is connected to the pneumatic chamber, and the mud outlet of the sludge conveying component is connected to the filter pressure chamber.

2. The sludge dewatering device according to claim 1, characterized in that: It also includes a cleaning component, which includes a water supply unit. The water supply unit is connected to the tank body through a first pipeline.

3. The sludge dewatering device according to claim 2, characterized in that: The first pipeline is connected with a cleaning branch pipe, and the cleaning branch pipe is communicated with the drainage port of the drainage cavity.

4. The sludge dewatering device according to claim 1, characterized in that: The movable filter plate is wrapped with filter cloth and is provided with water permeable holes.

5. The sludge dewatering device according to claim 1, characterized in that: The tank body is provided with a guiding mechanism for movably guiding the movable filter plate.

6. The sludge dewatering device according to claim 1, characterized in that: The tank body comprises an upper tank body and a lower tank body connected by a detachable connection structure.

7. The sludge dewatering device according to claim 6, characterized in that: The detachable connection structure is located between the movable filter plate and the fixed filter plate.

8. The sludge dewatering device according to claim 1, characterized in that: The tank body is connected with a pressure gauge which is in communication with the filter press chamber.

9. The sludge dewatering device according to claim 1, characterized in that: The tank body is connected with a pressure relief valve which is in communication with the pneumatic cavity.

10. The sludge dewatering device according to claim 1, characterized in that: The drainage cavity is provided with a drainage port, and the drainage port is communicated with the sewage recovery system through a second pipeline.

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