Sludge pretreatment device

Abstract

The utility model discloses a sludge pretreatment device, which relates to the technical field of sewage treatment and particularly comprises a device body, a sludge interception net is arranged in the middle of an inner cavity of the device body, an extrusion plate is movably arranged in the middle of an inner cavity of the sludge interception net, and the extrusion plate is of an I-shaped structure. A cleaning cavity is formed between the middle of the extrusion plate and the sludge intercepting net, a water pumping pipe is arranged on one side of the bottom end of the extrusion plate, one end of the water pumping pipe extends out of the device body, a cavity is formed between the device body and the sludge intercepting net, and drainage pipes are arranged on the two sides of the bottom of the cavity. According to the sludge pretreatment device, through the arrangement of the extrusion plate and the water spraying ring, in the extrusion dewatering process of sludge, the sludge interception net can be cleaned in real time, the cleaning difficulty of the sludge interception net is reduced, the filter screen holes can be prevented from being blocked, the drainage efficiency of the device is guaranteed, and then the sludge dewatering efficiency is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a sludge pretreatment device. Background Technology

[0002] Sludge is an unavoidable byproduct in the wastewater treatment process. Its moisture content is usually 95%-99%, which makes subsequent treatment (such as incineration and landfill) difficult and costly. Therefore, sludge needs to undergo dewatering pretreatment before subsequent treatment.

[0003] Currently, mechanical dewatering methods (such as plate and frame filter press, belt filter press, centrifugal dewatering, etc.) have become the mainstream technology for sludge dewatering due to their advantages of simple operation and low cost. However, during mechanical dewatering, colloidal particles, fibrous materials and sticky organic matter in the sludge are prone to clogging the filter cloth or filter screen, resulting in obstructed drainage channels and a significant decrease in dewatering efficiency over time. In the existing technology, although some mechanical dewatering equipment is equipped with a cleaning device, the filter cloth and filter screen can usually only be rinsed during the dewatering interval, which cannot solve the problem of filter hole clogging during the dewatering process, and will still affect the sludge dewatering efficiency. Moreover, the long-term clogging of the filter holes increases the difficulty of cleaning. Based on this, this application proposes a sludge pretreatment device. Utility Model Content

[0004] This invention provides a sludge pretreatment device that solves the problems mentioned in the background art, such as the inability to clean the filter holes in real time during the sludge dewatering process, which increases the difficulty of cleaning and makes the filter mesh easily clogged, affecting the drainage efficiency.

[0005] This utility model provides the following technical solution: a sludge pretreatment device, comprising a device body, a sludge interception net disposed in the middle of the inner cavity of the device body, a squeezing plate movably disposed in the middle of the inner cavity of the sludge interception net, the squeezing plate having an I-shaped structure, a cleaning chamber formed between the middle of the squeezing plate and the sludge interception net, a water pumping pipe disposed on one side of the bottom end of the squeezing plate, one end of the water pumping pipe extending to the outside of the device body, a cavity provided between the device body and the sludge interception net, drain pipes disposed on both sides of the bottom of the cavity, a flow meter disposed on the drain pipes, and a water spraying ring movably sleeved on the outer ring of the sludge interception net, the water outlet end of the water spraying ring being aligned with the cleaning chamber.

[0006] Preferably, both ends of the sludge interception net are provided with sealing plates, and the sealing plates are connected to the device body through a hydraulic telescopic rod.

[0007] Preferably, a hydraulic telescopic rod two is provided in the middle of the sealing plate, and an electromagnet is provided at the end of the output shaft of the hydraulic telescopic rod two. When the electromagnet is energized, the electromagnet and the extrusion plate are magnetically attracted to each other. A sludge injection pipe is provided on the sealing plate, and an electric ball valve is provided at the sludge discharge end of the sludge injection pipe.

[0008] Preferably, the water spray ring is connected to the device body via a hydraulic telescopic rod three. The water inlet end of the water spray ring is provided with a water inlet pipe. The end of the water inlet pipe away from the water spray ring extends to the outside of the device body. The water inlet pipe is movably connected to the device body. The end of the water inlet pipe away from the water spray ring is connected to a telescopic pipe one.

[0009] Preferably, it also includes a sewage pump, the inlet end of which is connected to the end of the pumping pipe away from the extrusion plate via a telescopic pipe.

[0010] Preferably, the inner wall of the device body is in contact with the outer wall of the water spray ring, and the outer wall of the water spray ring is provided with a sealing strip.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. This sludge pretreatment device uses a squeezing dewatering method to pretreat the sludge, thereby achieving sludge dewatering. During the dewatering process, the sludge to be dewatered can be injected into the sludge interception net, so that the sludge can still be squeezed and dewatered when the squeezing plate moves in the opposite direction, thus improving the working efficiency of the device.

[0013] 2. This sludge pretreatment device, through the setting of the extrusion plate and the water spray ring, can realize real-time cleaning of the sludge interception net during the process of extruding and dewatering the sludge, reduce the cleaning difficulty of the sludge interception net, and avoid the filter mesh from being blocked, thus ensuring the drainage efficiency of the device and the sludge dewatering efficiency. Attached Figure Description

[0014] Figure 1 This is a front view of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the back of the structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the interior of the structural device body of this utility model;

[0017] Figure 4 This is a schematic diagram of the internal structure of the sludge interception net of this utility model;

[0018] Figure 5 This is an exploded schematic diagram of the sealing plate structure of this utility model;

[0019] Figure 6This is a schematic diagram showing the positions of the water spray ring and the extrusion plate in the structure of this utility model.

[0020] In the diagram: 1. Device body; 2. Sealing plate; 3. Hydraulic telescopic rod three; 4. Hydraulic telescopic rod two; 5. Sludge injection pipe; 6. Drainage pipe; 7. Water inlet pipe; 8. Pumping pipe; 9. Telescopic pipe one; 10. Sewage pump; 11. Telescopic pipe two; 12. Sludge interception net; 13. Flow meter; 14. Spray ring; 15. Hydraulic telescopic rod one; 16. Electromagnet; 17. Extrusion plate; 18. High-pressure nozzle; 19. Electric ball valve. Detailed Implementation

[0021] 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.

[0022] This utility model provides an embodiment: Please refer to Figures 1-6 A sludge pretreatment device includes a device body 1. A sludge interception net 12 is provided in the middle of the inner cavity of the device body 1. Both ends of the sludge interception net 12 are provided with sealing plates 2. The sealing plates 2 are connected to the device body 1 through a hydraulic telescopic rod 15. The extension and retraction of the hydraulic telescopic rod 15 can change the position of the sealing plates 2 connected to it. The sealing plates 2 can seal the sludge interception net 12 or keep the open end of the sludge interception net 12 in an open state.

[0023] The sealing plate 2 is equipped with a sludge injection pipe 5. The sludge discharge end of the sludge injection pipe 5 is equipped with an electric ball valve 19. The sludge to be dewatered can be injected into the sludge interception net 12 using the sludge injection pipe 5. The electric ball valve 19 can control the opening and closing of the sludge injection pipe 5 to prevent the sludge from flowing back during the squeezing and dewatering process. A squeezing plate 17 is movably installed in the middle of the inner cavity of the sludge interception net 12, and a hydraulic telescopic rod 4 is installed in the middle of the sealing plate 2. An electromagnet 16 is installed at the end of the output shaft of the hydraulic telescopic rod 4. When the electromagnet 16 is energized, the electromagnet 16 and the squeezing plate 17 are magnetically attracted to each other. With this configuration, the extension of the hydraulic telescopic rod 4 can squeeze the squeezing plate 17, and the sludge on the side of the squeezing plate 17 away from the hydraulic telescopic rod 4 can be squeezed by the squeezing plate 17 to achieve sludge dewatering. When the electromagnet 16 is energized, the magnetic attraction between the electromagnet 16 and the squeezing plate 17 can cause the squeezing plate 17 to move in the opposite direction when the hydraulic telescopic rod 4 retracts.

[0024] The extrusion plate 17 has an I-shaped structure. A cleaning chamber is formed between the middle of the extrusion plate 17 and the sludge interception net 12. A water pumping pipe 8 is provided on one side of the bottom end of the cleaning chamber. The end of the water pumping pipe 8 away from the extrusion plate 17 passes through the sealing plate 2 and extends to the outside of the device body 1. The water pumping pipe 8 and the sealing plate 2 are in a movable connection state. This sludge pretreatment device also includes a sewage pump 10. The inlet end of the sewage pump 10 is connected to the end of the water pumping pipe 8 away from the extrusion plate 17 through the telescopic pipe 11. When the sewage pump 10 is working, the sewage in the cleaning chamber can be pumped away by the sewage pump 10. The sewage in the cleaning chamber is discharged through the outlet end of the sewage pump 10.

[0025] A water spray ring 14 is movably fitted around the outer ring of the sludge interception net 12. High-pressure nozzles 18 are evenly arranged in the middle of the inner cavity of the water spray ring 14. A water inlet pipe 7 is connected to the water inlet end of the water spray ring 14. The end of the water inlet pipe 7 away from the water spray ring 14 extends to the outside of the device body 1 and is movably connected to the device body 1. A telescopic pipe 9 is connected to the end of the water inlet pipe 7 away from the water spray ring 14. When this device is in use, the cleaning fluid for cleaning the sludge interception net 12 enters the water spray ring 14 through the telescopic pipe 9 and the water inlet pipe 7. In the water storage chamber of 4, the water in the water storage chamber of the spray ring 14 is sprayed out through the high-pressure nozzle 18. The sprayed water is sprayed onto the sludge interception net 12 to clean the sludge interception net 12. The water outlet of the spray ring 14 is aligned with the cleaning chamber. With this setting, the cleaning water sprayed by the high-pressure nozzle 18 can pass through the sludge interception net 12 and enter the cleaning chamber, avoiding the sewage generated during the cleaning process from affecting the dewatering of the sludge. When the cleaning water passes through the sludge interception net 12, it can clean the mesh of the sludge interception net 12.

[0026] The water spray ring 14 is connected to the device body 1 via a hydraulic telescopic rod 3. The extension and retraction of the hydraulic telescopic rod 3 can change the position of the water spray ring 14 connected to it. During use, the water spray ring 14 and the extrusion plate 17 are in a relatively static state. During the sludge dewatering process, the device can clean the sludge interception net 12.

[0027] The inner wall of the device body 1 contacts the outer wall of the spray ring 14. The outer wall of the spray ring 14 is provided with a sealing strip. By setting the spray ring 14, the spray ring 14 can push the sewage generated during sludge dewatering during movement, which facilitates the discharge of sewage. The sealing strip reduces the friction between the spray ring 14 and the device body 1, and extends the service life of the device body 1 and the spray ring 14.

[0028] A cavity is provided between the device body 1 and the sludge interception net 12. Drainage pipes 6 are provided on both sides of the bottom of the cavity. A flow meter 13 is provided on the drainage pipe 6. The flow meter 13 can detect the amount of sludge dewatering in real time. The controller in the device can determine whether the sludge has been dewatered in time based on the detected amount of dewatering. When the sludge has been dewatered in time, the sealing plate 2 in the moving direction of the squeezing plate 17 is in the open state. The dewatered sludge can be discharged under the squeezing force of the squeezing plate 17. During the discharge process, a sludge placement cavity is formed between the squeezing plate 17 and the other sealing plate 2. The dewatered sludge can be injected into the sludge placement cavity. When the squeezing plate 17 moves in the opposite direction, the squeezing plate 17 can squeeze the sludge in the sludge placement cavity, thereby improving the efficiency of the device in handling sludge.

[0029] Both telescopic pipe 9 and telescopic pipe 11 can be made of high-pressure resistant corrugated pipe. The extruded plate 17 is made of ferromagnetic material; its material can be selected according to requirements and is not limited here. The electromagnet 16 can be model MAG-500HD. The lengths of both the inlet pipe 7 and the pumping pipe 8 are greater than the length of the sludge interception net 12; the lengths of both the inlet pipe 7 and the pumping pipe 8 can be set according to requirements and are not limited here.

[0030] All electrical components involved in this application are existing technologies. Those skilled in the art can select appropriate models of electrical components according to their needs. No restrictions or elaborations are made here. Those skilled in the art understand their connection methods. With the help of those skilled in the art, all electrical components in this application and their compatible power supplies can be connected by wires. According to the actual situation, appropriate controllers can be selected to meet control requirements. For specific connections and control sequences, please refer to the description below. The electrical connections between the various electrical components are completed in the order of their operation. The detailed connection methods are well-known technologies in the art. The following mainly introduces the working principle and process, and will not describe the electrical control.

[0031] In summary: When using this sludge pretreatment device, the sludge is injected into the inner cavity of the sludge interception net 12 through the sludge injection pipe 5, so as to... Figure 4Taking the direction shown as an example, if the sludge is located on the left side of the extrusion plate 17, the output shaft end of the hydraulic telescopic rod 4 on the right side of the device body 1 is in close contact with the extrusion plate 17, and the hydraulic telescopic rod 4 extends, pushing the extrusion plate 17 to move. The extrusion plate 17 extrudes the sludge on its left side. Under the action of the extrusion force, excess water in the sludge is squeezed out. The squeezed water passes through the sludge interception net 12 and enters the inner cavity of the device body 1, and is finally discharged through the drain pipe 6 on the left side of the device body 1. The flow meter 13 monitors the drainage volume of the drain pipe 6 in real time. The control system inside the device... The device judges based on the detected drainage volume. If the drainage volume reaches the minimum threshold set by the user, the controller in the device judges that the sludge dewatering is in place. The left hydraulic telescopic rod 15 drives the sealing plate 2 to move, and the left side of the sludge interception net 12 is in the open state, so the dewatered sludge can be discharged. During the sludge discharge process, the electromagnet 16 is in the energized state to prevent the squeezing plate 17 from separating from the sludge interception net 12. After the sludge is discharged, the left sealing plate 2 is reset, the electromagnet 16 is in the de-energized state, the left hydraulic telescopic rod 24 extends, the right hydraulic telescopic rod 24 retracts, and the squeezing plate 17 can move in the opposite direction.

[0032] During the sludge dewatering process, a sludge placement cavity is formed between the right side of the extrusion plate 17 and the right side sealing plate 2. The sludge to be dewatered can be injected into the sludge placement cavity. During the reverse movement of the extrusion plate 17, the sludge in the sludge placement cavity is squeezed and drained, thereby improving the efficiency of the device in sludge treatment.

[0033] During the sludge dewatering process, under the action of the hydraulic telescopic rod 3, the spray ring 14 and the extrusion plate 17 are in a relatively static state. The water used to clean the sludge interception net 12 is injected into the water storage chamber of the spray ring 14 through the telescopic pipe 9 and the water inlet pipe 7. The water in the water storage chamber of the spray ring 14 is sprayed out through the high-pressure nozzle 18. The sprayed water is sprayed onto the sludge interception net 12 to clean the sludge interception net 12. The cleaning water sprayed by the high-pressure nozzle 18 passes through the sludge interception net 12 and enters the cleaning chamber, avoiding the sewage generated during the cleaning process from affecting the sludge dewatering. When the cleaning water passes through the sludge interception net 12, it can clean the mesh of the sludge interception net 12. The sewage that enters the cleaning chamber is discharged through the water pump 10 through the water suction pipe 8 and the telescopic pipe 11, realizing dewatering and cleaning at the same time and ensuring the drainage efficiency of the device.

[0034] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each structure adopt conventional technical means such as bolt connection that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sludge pretreatment device, comprising a device body (1), characterized in that: A sludge interception net (12) is provided in the middle of the inner cavity of the device body (1). A squeezing plate (17) is movably provided in the middle of the inner cavity of the sludge interception net (12). The squeezing plate (17) has an I-shaped structure. A cleaning chamber is formed between the middle of the squeezing plate (17) and the sludge interception net (12). A water pumping pipe (8) is provided on one side of the bottom end of the squeezing plate (17). One end of the water pumping pipe (8) extends to the outside of the device body (1). A cavity is provided between the device body (1) and the sludge interception net (12). Drainage pipes (6) are provided on both sides of the bottom of the cavity. A flow meter (13) is provided on the drainage pipe (6). A water spraying ring (14) is movably fitted on the outer ring of the sludge interception net (12). The water outlet end of the water spraying ring (14) is aligned with the cleaning chamber.

2. The sludge pretreatment device according to claim 1, characterized in that: Both ends of the sludge interception net (12) are equipped with sealing plates (2), and the sealing plates (2) are connected to the device body (1) through a hydraulic telescopic rod (15).

3. The sludge pretreatment device according to claim 2, characterized in that: The sealing plate (2) is provided with a hydraulic telescopic rod 2 (4) in the middle. An electromagnet (16) is provided at the end of the output shaft of the hydraulic telescopic rod 2 (4). When the electromagnet (16) is energized, the electromagnet (16) and the extrusion plate (17) are magnetically attracted to each other. The sealing plate (2) is provided with a sludge injection pipe (5). An electric ball valve (19) is provided at the sludge discharge end of the sludge injection pipe (5).

4. The sludge pretreatment device according to claim 1, characterized in that: The water spray ring (14) is connected to the device body (1) via a hydraulic telescopic rod three (3). The water inlet end of the water spray ring (14) is provided with a water inlet pipe (7). The end of the water inlet pipe (7) away from the water spray ring (14) extends to the outside of the device body (1). The water inlet pipe (7) is movably connected to the device body (1). The end of the water inlet pipe (7) away from the water spray ring (14) is connected to a telescopic pipe one (9).

5. The sludge pretreatment device according to claim 1, characterized in that: It also includes a sewage pump (10), the inlet end of which is connected to the end of the pumping pipe (8) away from the extrusion plate (17) via a telescopic pipe (11).

6. The sludge pretreatment device according to claim 1, characterized in that: The inner wall of the device body (1) is in contact with the outer wall of the water spray ring (14), and the outer wall of the water spray ring (14) is provided with a sealing strip.

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