A filter press for sludge treatment

Abstract

The utility model discloses a filter press for sludge treatment, including mounting bracket, the mounting bracket top is provided with the conveying pipe, the conveying pipe inside rotation is provided with spiral blade, the mounting bracket rear is provided with extrusion subassembly, extrusion subassembly includes the sliding slot, the sliding slot inside sliding is provided with the slide, the slide front is provided with the baffle, the baffle is provided with extrusion mouth on the slide and passes through, the utility model: the utility model discloses setting extrusion subassembly in the mounting bracket rear, utilize electric telescopic link to push the baffle and block in the conveying pipe rear, make sludge in conveying pipe end receive the double effect of spiral blade thrust and baffle resistance, and the superfluous moisture is discharged through extrusion mouth, solved the background art in the existing conveying pipe screw material feeder only rely on the problem of penetration dewatering, sludge reaches the direct falling down of the slag discharge pipe place and leads to the problem of insufficient dewatering, and the moisture of sludge is further separated after the secondary treatment of the moisture of extrusion mouth.

Description

Technical Field

[0001] This utility model relates to the field of sludge treatment technology, specifically a filter press for sludge treatment. Background Technology

[0002] Sludge treatment is the process of treating solid waste with high water content and complex composition generated during wastewater treatment. The core is to reduce the volume of sludge, reduce its pollutant content and environmental risks through technologies such as concentration, dewatering, stabilization and harmlessness, and finally achieve reduction, harmlessness and resource utilization (such as conversion into fertilizer, fuel or building materials), and avoid secondary pollution of soil, water and air caused by indiscriminate dumping or discharge of sludge.

[0003] The existing Chinese patent publication number is CN221141555U, entitled "A Filter Press Device for Sludge Treatment". The patent abstract explicitly states that "This utility model proposes a sludge treatment filter press device, relating to the field of sludge treatment technology, including a bottom box, with a filter press structure fixed at the upper end of the bottom box, and a filter cloth detachably fixed to the upper surface of the bottom box; the filter press structure includes a conveying pipe fixed above the bottom box, and filter holes are evenly distributed on the lower surface of the conveying pipe directly above the bottom box. This device drives a screw conveyor to rotate via a rotating shaft, and the sludge is squeezed during the conveying process due to the structural characteristics of the screw conveyor. With the filter holes, filtration can be achieved during the sludge conveying process, and the sludge can be output from the sludge discharge pipe, avoiding manual loading and unloading of filter residue and improving the practicality of the equipment; the threaded connection between the screw and the connecting nut allows the connecting nut to drive the collar to slide on the conveying pipe, further allowing the brush to act on the lower side of the conveying pipe, thereby achieving the cleaning of the filter holes, preventing filter hole blockage, and improving the practicality of the equipment."

[0004] However, in this technology, the existing conveying pipe screw conveyor can only be used to transport sludge. The water in the sludge only falls through the filter holes by permeation. When the sludge reaches the sludge discharge pipe, it falls directly, which cannot achieve a good squeezing effect at the end. This results in insufficient sludge dewatering, high moisture content in the filter cake, and the need for additional treatment, which affects the overall sludge treatment efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a filter press for sludge treatment to solve the problem of insufficient sludge dewatering mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A filter press for sludge treatment includes a mounting frame, a conveying pipe is provided at the top of the mounting frame, a spiral blade is rotatably arranged inside the conveying pipe, and an extrusion assembly is provided at the rear of the mounting frame. The extrusion assembly includes a chute, a slide plate is slidably disposed inside the chute, a baffle is disposed in front of the slide plate, and an extrusion port is disposed through the baffle and the slide plate.

[0007] In a preferred embodiment of this utility model, a motor is provided in front of the conveying pipe, and the output end of the motor is connected to a spiral blade.

[0008] In a preferred embodiment of the present invention, a feed inlet is provided at the front of the top of the conveying pipe, and a first drain outlet is provided at the bottom of the conveying pipe.

[0009] In a preferred embodiment of this utility model, the rear of the conveying pipe is a through structure, and the baffle is installed and removed from the rear of the conveying pipe.

[0010] In a preferred embodiment of this utility model, electric telescopic rods are provided on both sides of the rear of the slide, and the telescopic end of the electric telescopic rod is connected to the slide plate.

[0011] In a preferred embodiment of this utility model, a cleaning rod is provided behind the inner side of the chute, and the cleaning rod is installed and removed from the extrusion port.

[0012] In a preferred embodiment of this utility model, an inclined guide plate is provided below the chute, and a second drain is provided on the inclined guide plate.

[0013] In a preferred embodiment of the present invention, a first receiving groove is provided at the bottom of the first leak, and a second receiving groove is provided below the second leak, with a filter plate placed on the first receiving groove and the second receiving groove.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

[0015] Beneficial effects: This utility model, by setting an extrusion component behind the mounting frame and using an electric telescopic rod to push a baffle to block the rear of the conveying pipe, causes the sludge to be subjected to the dual action of the thrust of the spiral blades and the resistance of the baffle at the end of the conveying pipe. Excess water is discharged through the extrusion port, which solves the problem in the prior art where the existing conveying pipe spiral conveyor relies solely on permeation dewatering and the sludge falls directly to the slag discharge pipe, resulting in insufficient dewatering. The secondary treatment of water discharged through the extrusion port further separates the water in the sludge, significantly reducing the moisture content of the filter cake. No additional subsequent treatment is required, effectively improving the overall sludge treatment efficiency.

[0016] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 A schematic diagram of the main structure of a filter press for sludge treatment; Figure 2 This is a schematic diagram of the front structure of a filter press for sludge treatment. Figure 3 This is a schematic cross-sectional view of a filter press for sludge treatment. Figure 4 This is a schematic diagram of the baffle structure in a filter press for sludge treatment.

[0018] In the diagram: 1. Mounting frame; 11. Conveying pipe; 12. Spiral blade; 13. Motor; 14. Feed inlet; 2. First discharge port; 21. Slide groove; 22. Baffle; 23. Extrusion port; 24. Slide plate; 3. Electric telescopic rod; 31. Cleaning rod; 32. Inclined guide plate; 33. Second discharge port; 4. First receiving trough; 41. Second receiving trough; 42. Filter plate. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] Please refer to Figures 1-4This utility model discloses a filter press for sludge treatment, including a mounting frame 1. The mounting frame 1 is made of 304 stainless steel and has an overall frame structure to support the various components of the equipment. A conveying pipe 11 is welded and fixed to the top of the mounting frame 1. The conveying pipe 11 is a stainless steel round pipe with an inner diameter designed to be 150-200mm according to the processing capacity. A spiral blade 12 is rotatably mounted inside the conveying pipe 11. The spiral blade 12 is made of wear-resistant manganese steel with a blade thickness of 8-10mm. A motor 13 is fixed to the front of the conveying pipe 11 via a motor bracket. The motor 13 is a Y-series three-phase asynchronous motor, model Y132M-4, with a rated power of 7.5kW. The output end of the motor 13 is connected to the spiral blade 12 via a coupling. A controller is located in front of the motor 13. The controller is a PLC controller, model S7-200SMART, used to control the start, stop and speed of the motor 13.

[0021] A feed inlet 14 is welded and fixed to the front of the top of the conveying pipe 11. The feed inlet 14 is a rectangular structure made of polypropylene, with an upper opening length of 250-300mm and a width of 180-220mm, which facilitates the smooth introduction of sludge. The bottom of the conveying pipe 11 is evenly provided with first drain outlets 2. The first drain outlets 2 are circular holes with a diameter of 10-15mm and a spacing of 30-40mm between adjacent holes. A first receiving trough 4 is placed at the bottom of the first drain outlets 2. The first receiving trough 4 is a rectangular trough made of polypropylene. The length of the trough is 100-150mm longer than the distribution length of the first drain outlets 2 on the conveying pipe 11, the width is 350-450mm, and the height is 150-180mm.

[0022] An extrusion assembly is fixedly installed at the rear of the mounting frame 1 by welding. The extrusion assembly includes a chute 21, which is a U-shaped chute structure made of stainless steel. The width of the chute is adapted to the slide plate 24. The slide plate 24 is slidably installed inside the chute 21. The slide plate 24 is a rectangular stainless steel plate with a thickness of 5-8mm. A baffle 22 is fixedly installed at the front of the slide plate 24 by welding. The baffle 22 is a circular stainless steel plate with a diameter adapted to the inner diameter of the conveying pipe 11. The rear of the conveying pipe 11 is a through structure. The baffle 22 is installed and removed at the rear of the conveying pipe 11. When the baffle 22 is installed in place, it can completely block the rear opening of the conveying pipe 11.

[0023] Electric telescopic rods 3 are fixedly installed on both sides of the rear of the chute 21 via brackets. The electric telescopic rods 3 are multi-stage electric push rods, model DTZ300, with a rated thrust of 3000N and a stroke of 100-150mm. A controller is fixedly installed on the rear of the chute 21 via brackets. This controller and the controller in front of the motor 13 are connected to the same PLC control system, which can realize linkage control. The telescopic end of the electric telescopic rod 3 is connected to the slide plate 24 via a flange. The baffle 22 and the slide plate 24 are provided with a squeezing port 23. The squeezing port 23 is a circular hole with a diameter of 20-30mm designed according to the drainage requirements. It is used to discharge the water separated during the squeezing process. A cleaning rod 31 is fixedly installed on the inner rear of the chute 21 via welding. The cleaning rod 31 is a stainless steel cylindrical rod with a diameter 2-3mm smaller than the squeezing port 23. The cleaning rod 31 is installed and removed in the squeezing port 23. When the electric telescopic rod 3 drives the baffle 22 to retract, the cleaning rod 31 will insert into the squeezing port 23 to remove the sludge remaining in the squeezing port 23 and avoid blockage that affects drainage.

[0024] A slanted guide plate 32 is welded and fixed below the chute 21. The slanted guide plate 32 is made of stainless steel and has an inclination angle of 30-45° to facilitate the downward flow of water discharged from the extrusion port 23. A second drain 33 is evenly opened on the slanted guide plate 32. The second drain 33 is a circular hole with the same diameter as the first drain 2. A second receiving trough 41 is placed below the second drain 33. The second receiving trough 41 is a rectangular trough made of polypropylene. Its length and width are one-quarter of the first receiving trough 4, and its height is half of the first receiving trough 4. Filter plates 42 are placed on both the first receiving trough 4 and the second receiving trough 41. The filter plates 42 are microporous filter plates made of polypropylene with a pore size of 5-10μm, which are used for secondary filtration of the extruded water.

[0025] Before operating the equipment, check the installation of each component: ensure that the baffle 22 is tightly fitted to the rear end of the conveying pipe 11, the cleaning rod 31 is in the initial state before being inserted into the extrusion port 23, the filter plates 42 in the first receiving groove 4 and the second receiving groove 41 are placed flat, and the motor 13, the electric telescopic rod 3, and the controller are properly connected. When starting the equipment, set the speed of the motor 13 and the extension frequency of the electric telescopic rod 3 through the controller. The motor 13 drives the spiral blade 12 to rotate, and at the same time, the electric telescopic rod 3 extends, pushing the slide plate 24 forward, which in turn causes the baffle 22 to block the rear of the conveying pipe 11, forming a closed space at the rear end of the conveying pipe 11.

[0026] The sludge to be treated is poured into the conveying pipe 11 through the feed inlet 14. During the rotation of the spiral blade 12, the sludge is conveyed from the front to the rear of the conveying pipe 11. During this process, the sludge is initially squeezed by the spiral blade 12, and some water drips through the first leak 2 and falls into the first receiving tank 4 below. After being filtered by the filter plate 42 in the first receiving tank 4, the water is retained in the first receiving tank 4, and the impurities are intercepted on the filter plate 42. When the sludge is transported to the rear of the conveying pipe 11, it cannot be discharged directly due to the baffle 22 blocking the rear. As the spiral blade 12 continues to transport, the sludge accumulates at the rear end of the conveying pipe 11. At the same time, the electric telescopic rod 3 maintains the thrust, so that the baffle 22 forms a reverse pressure on the sludge. Under the combined action of the thrust of the spiral blade 12 and the resistance of the baffle 22, the excess water of the sludge is discharged through the squeezing port 23. The discharged water falls on the inclined guide plate 32 and flows along the inclined guide plate 32 to the second drain 33. It falls into the second receiving tank 41 through the second drain 33 and is collected after being filtered by the filter plate 42 in the second receiving tank 41.

[0027] After one compression cycle is completed, the electric telescopic rod 3 retracts under the control of the controller, causing the slide plate 24 to move backward, thereby opening the rear of the conveying pipe 11. At this time, the spiral blades 12 continue to rotate, discharging the compressed sludge filter residue from the rear end of the conveying pipe 11. Simultaneously, during the retraction of the electric telescopic rod 3, the cleaning rod 31 is inserted into the compression port 23 to scrape away any residual sludge inside, preventing blockage and ensuring subsequent drainage. After the filter residue is discharged, the electric telescopic rod 3 extends again, pushing the baffle 22 to block the rear of the conveying pipe 11, initiating the next compression cycle.

[0028] During equipment operation, the filter plates 42 in the first receiving tank 4 and the second receiving tank 41 can be removed periodically for cleaning or replacement to ensure filtration effect. If the baffle 22 or the spiral blades 12 need to be maintained, the baffle 22 can be disassembled by cutting and re-welding (or a detachable connector can be reserved during the initial welding). The baffle 22 can be removed before operation.

[0029] The working principle of this utility model is as follows: First, the electric telescopic rod 3 is extended by the controller, pushing the baffle 22 to block the rear of the conveying pipe 11. Then, the motor 13 is started, and the motor 13 drives the spiral blade 12 to rotate inside the conveying pipe 11, conveying the sludge poured in from the feed inlet 14 to the rear of the conveying pipe 11. During the conveying process, the sludge is initially squeezed by the spiral blade 12, and some water falls into the first receiving tank 4 through the first leak 2, where it is filtered and collected by the filter plate 42. When the sludge is conveyed to the rear of the conveying pipe 11, it cannot be discharged because the baffle 22 blocks it. Under the continuous thrust and the reverse pressure of the baffle 22, excess water in the sludge is discharged through the extrusion port 23. The discharged water flows through the inclined guide plate 32 to the second drain port 33, falls into the second receiving tank 41, and is filtered and collected by the filter plate 42 in the second receiving tank 41. After the extrusion is completed, the controller controls the electric telescopic rod 3 to retract, opens the rear of the conveying pipe 11, and the spiral blades 12 discharge the filter residue. At the same time, the cleaning rod 31 is inserted into the extrusion port 23 to remove the residual sludge. Then the electric telescopic rod 3 extends again to push the baffle 22 to block it, and enters the next round of processing cycle to achieve sludge dewatering treatment.

[0030] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A filter press for sludge treatment, characterized in that: The device includes a mounting frame (1), a conveying pipe (11) is provided on the top of the mounting frame (1), a spiral blade (12) is rotatably provided inside the conveying pipe (11), and an extrusion assembly is provided behind the mounting frame (1). The extrusion assembly includes a chute (21), a slide plate (24) is slidably disposed inside the chute (21), a baffle (22) is disposed in front of the slide plate (24), and an extrusion port (23) is disposed through the baffle (22) and the slide plate (24).

2. A filter press for sludge treatment according to claim 1, characterized in that, A motor (13) is provided in front of the conveying pipe (11), and the output end of the motor (13) is connected to the spiral blade (12).

3. A filter press for sludge treatment according to claim 1, characterized in that, The conveying pipe (11) has a feed inlet (14) at the top front and a first drain outlet (2) at the bottom.

4. A filter press for sludge treatment according to claim 1, characterized in that, The conveying pipe (11) has a through structure behind it, and the baffle (22) is installed and removed from the rear of the conveying pipe (11).

5. A filter press for sludge treatment according to claim 1, characterized in that, Electric telescopic rods (3) are provided on both sides of the rear of the slide (21), and the telescopic end of the electric telescopic rod (3) is connected to the slide plate (24).

6. A filter press for sludge treatment according to claim 1, characterized in that, A cleaning rod (31) is provided on the inner rear side of the chute (21), and the cleaning rod (31) is installed and removed in the extrusion port (23).

7. A filter press for sludge treatment according to claim 3, characterized in that, A guide plate (32) is provided below the chute (21), and a second drain (33) is provided on the guide plate (32).

8. A filter press for sludge treatment according to claim 7, characterized in that, The first outlet (2) has a first receiving groove (4) at its bottom, and the second outlet (33) has a second receiving groove (41) below it. A filter plate (42) is placed on the first receiving groove (4) and the second receiving groove (41).

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