Pressure suction solid-liquid separator

Abstract

A pressure-absorption solid-liquid separator includes a filter, a pressurizing machine is arranged above the rear part of the filter frame, the pressurizing machine has a pressurizing machine belt arranged between the pressurizing machine driving roller and the pressurizing machine passive roller, the pressurizing machine filter cloth is wound around the outer circumference of the pressurizing machine belt, a pressurizing device is installed in the gap between the upper and lower widths of the pressurizing machine belt, the pressurizing device has a plurality of roller groups that can move up and down, each roller group has a plurality of rollers arranged in parallel and perpendicular to the length direction of the pressurizing machine belt, and a roller group pressing device is also provided, each roller group is connected to the roller group pressing device, and a plurality of supporting rollers are arranged at the position corresponding to the roller group under the upper width of the filter belt. The present invention organically integrates negative pressure water absorption and pressurized water squeezing into one device, which ingeniously solves the problem of high moisture content of the product, solves the problem of unsustainable production, and eliminates the unsafe problem caused by high pressure.

Description

Technical Field

[0001] The present invention relates to a device for dehydrating slurry to achieve solid-liquid separation, in particular to a pressure-absorption solid-liquid separator which can enable the slurry to continuously obtain negative pressure water absorption and positive pressure water squeezing during uninterrupted transportation to achieve rapid dehydration. Background Art

[0002] At present, there are four main known methods for slurry dehydration. One is to pump the slurry into the chamber formed between the filter plates to pressurize it or further apply high pressure to the membrane filter plate to achieve dehydration. The second is to achieve dehydration by negative pressure water absorption. The third is to squeeze the filter belt on the drum to dehydrate. The fourth is to loosen the material by vibration and then dehydrate it by gravity. The main types of slurry solid-liquid separation equipment commonly used are frame filter press, membrane filter press, high-pressure filter press, belt filter press, disc filter, high-frequency screen, etc. The existing solid-liquid separation equipment on the market has a single dehydration method. Dehydration by negative pressure water absorption can operate continuously, but the product moisture content is high; dehydration by pressurized squeezing requires the slurry to be in a paused state to dehydrate, and cannot operate continuously. In addition, the product moisture content of most types of equipment is high. Although the new high-pressure equipment can reduce the product moisture content, it is necessary to increase the air pressure or high hydraulic pressure on the membrane filter plate to achieve it, which is unsafe due to the high pressure. In addition, the existing solid-liquid separation equipment on the market has few controllable means to control product moisture and processing volume, so the market is in urgent need of a device that can solve the above shortcomings. Summary of the invention

[0003] The purpose of the present invention is to provide a pressure-suction solid-liquid separator to overcome the shortcomings of the existing solid-liquid separation equipment that adopts a single dehydration method.

[0004] The objective of the present invention is achieved in the following manner: the pressure-suction solid-liquid separator comprises a filter, which has a frame, an upper frame fixedly connected above the drive end frame of the filter, a pressurizing machine is arranged on the upper frame, the pressurizing machine has a pressurizing machine driving roller arranged on the upper frame and a pressurizing machine passive roller which can move forward and backward, a spring tensioning mechanism is connected to the bearing seat of the pressurizing machine passive roller, a pressurizing machine tape is wound between the pressurizing machine driving roller and the pressurizing machine passive roller, and the tail roller is pulled backward by the spring tensioning mechanism for tensioning, and when the pressurizing machine moves up and down, the pressurizing machine tape is always in a moderately tensioned state under the action of the spring of the spring tensioning device. A pressurizing filter cloth is wound around the outer circumference of the pressurizing belt. The lower part of the pressurizing filter cloth is tightly attached to the pressurizing belt. The upper part of the pressurizing filter cloth is supported by a number of guide rollers. The pressurizing drive roller is connected to the rotary power. A pressurizing device is installed in the gap between the upper and lower parts of the pressurizing belt on the upper frame. The pressurizing device has a number of roller groups arranged along the length direction of the pressurizing belt, which are vertically guided and can move up and down. Each roller group is parallel to a number of rollers perpendicular to the length direction of the pressurizing belt, and there is also a roller group pressing device. Each roller group is connected to the roller group pressing device. A number of supporting rollers are arranged at the position corresponding to the roller group under the upper part of the filter belt of the filter. The filter negative pressure water absorption, [1] pressure water squeezing, negative pressure water absorption and pressure water squeezing are organically integrated in one device. The slurry is first formed into a cake by negative pressure water absorption, and then the cake is deeply dehydrated by the negative pressure water absorption and pressure water squeezing at the same time. During the operation of the pressurized conveyor, the pressure device applies pressure to the pressure roller group, and the pressure rollers of the pressure roller group pressurize the pressurized machine belt and the pressurized machine filter cloth downward, forming a clamping force with the supporting force of the filter support rollers, squeezing water out of the material cake wrapped between the pressurized conveyor and the filter. The pressurized conveyor and the filter operate synchronously.

[0005] The filter is a filter driving drum arranged at the rear and a filter passive drum arranged at the front on the frame, a filter tape is wound between the filter driving drum and the filter passive drum, a vacuum box with an upper opening is fixed on the frame, the vacuum box is in the space formed by the upper and lower widths of the filter tape, and the upper opening of the vacuum box is attached to the bottom surface of the upper width of the filter tape, a drainage pipe is connected to the bottom of the vacuum box, a discharge drum is arranged at the rear of the filter driving drum on the frame, a filter cloth surrounding the filter tape and the discharge drum is arranged on the periphery of the filter cloth, the upper width of the filter cloth and the overlapping part of the upper width of the filter tape are attached thereto, the other parts of the filter cloth are tensioned and supported by the discharge drum and the guide roller arranged on the frame, and a filter cloth washing pipe for the filter cloth is arranged on the frame. The filter part mainly realizes the function of negative pressure water absorption, the drainage pipe at the bottom of the vacuum box is connected to the gas-water separator, and the gas-water separator is connected to the vacuum pump through the pipeline, and the vacuum pump sucks the vacuum box to form negative pressure to achieve the purpose of negative pressure water absorption of the filter. The filter and its auxiliary facilities are known equipment.

[0006] The pressing device for the pressing roller group has a horizontal push rod located above the pressing roller group and the guide device is movable on the upper frame. A hydraulic cylinder is connected between one end of the horizontal push rod and the upper frame, and a wedge-shaped pressing device is provided between the horizontal push rod and each pressing roller group. The hydraulic cylinder drives the horizontal push rod to move horizontally, and the wedge-shaped pressing device converts the horizontal movement of the horizontal push rod into up and down movement, thereby driving the pressing roller group to move up and down.

[0007] The wedge-shaped pressing device has an inclined push rod corresponding to the number of roller groups. The inclined push rod is a strip-shaped body with a roller groove along the length direction. One end of the inclined push rod is hinged to the nose fixed on the bottom of the horizontal push rod, and the other end of the inclined push rod is hinged to an adjusting screw. The threaded rod of the adjusting screw passes through the strip-shaped through hole on the horizontal push rod, and the threaded rod of the adjusting screw is screwed with adjusting nuts on both sides of the upper and lower sides of the horizontal push rod. The inclined push rod is inclined relative to the horizontal direction; a roller seat is fixed on the top surface of the roller group, and the roller is supported on the roller seat through the wheel axle. The roller is in the roller groove of the inclined push rod and its diameter is adapted to the width of the roller groove. By adjusting the height of the adjusting screw relative to the horizontal push rod, the inclination of the inclined push rod can be adjusted. By adjusting the height of the adjusting screw of the wedge-shaped pressing device corresponding to each roller group, the expected initial height of each roller group can be adjusted. After the position of the adjusting screw is determined, it is locked and fixed by the adjusting nut thereon.

[0008] The roller group has a rectangular roller group frame, and a plurality of rollers are arranged side by side at the bottom of the roller group frame. The rollers are supported on the two side walls of the roller group frame through roller shafts, and the arc surface of the bottom part of the roller is lower than the bottom surface of the periphery of the roller group frame.

[0009] The inner and outer sides of the roller assembly frame are provided with alternate vertical positioning grooves for cooperating with the vertical positioning columns on the upper frame. The positioning columns cooperate with the positioning grooves to guide the up and down movement of the roller assembly frame. A bearing seat can also be fixed on the side of the roller assembly frame, an axial sliding bearing can be fixed in the bearing seat, a vertical guide rod can be fixed on the upper frame, and the axial sliding bearing can be sleeved on the guide rod to guide the up and down movement of the roller assembly frame.

[0010] Sprockets are fixed to the ends of the central axes of the filter driving drum, the discharge drum and the press driving drum respectively, and there is a driving device with a sprocket fixed on the output shaft. A power chain is hung between the sprockets on the driving device, the filter driving drum and the press driving drum, and a discharge chain is hung between the sprockets on the filter driving drum and the discharge drum.

[0011] The diameters of the filter drive drum, the press drive drum and the discharge drum are the same, and the diameters and the number of teeth of the sprockets connecting the three are equal to achieve synchronous operation of the above three drums.

[0012] A compressor filter cloth flushing pipe is provided on the outside of the compressor filter cloth.

[0013] Solid-liquid separation process: after adding filter aid, the slurry is evenly spread on the filter cloth and enters the negative pressure water absorption area of ​​the filter. The filter cloth is covered on the grooved filter belt and runs synchronously with the belt. There are holes in the middle of the filter belt connected to the vacuum box. The vacuum box is connected to the vacuum pump through the gas-water separator. The negative pressure generated by the vacuum pump absorbs the water in the slurry. The negative pressure water absorption runs through the entire dehydration process of this equipment; the slurry moves with the filter cloth, and after a period of negative pressure water absorption, the slurry forms a cake and enters the bottom of the pressurizer. It is wrapped between the filter cloth and the pressurizer cloth and enters the pressure suction dehydration area. In the pressure suction dehydration area, multiple groups of rollers pressurize the pressurizer belt downward, and a clamping force is formed under the support of multiple supporting rollers of the filter, so that the cake wrapped between the filter cloth and the pressurizer cloth, that is, between the pressurizer belt and the filter belt, is quickly and significantly squeezed and dehydrated, and the squeezed water is sucked away by the vacuum pump.

[0014] The present invention organically integrates negative pressure water absorption and pressurized water squeezing into one device, which ingeniously solves the problem of high moisture content of the product, solves the problem of discontinuous production, and eliminates the unsafe problem caused by high pressure. The present invention can adjust the thickness of the cake by adjusting the amount of feed to improve the dehydration effect and processing volume during the continuous operation of the equipment, adjust the dehydration time and processing volume of the cake by adjusting the conveyor speed, and achieve further dehydration by adjusting the pressure of the pressurizer and the negative pressure, so that the moisture content and processing volume of the product meet different needs. Dehydration by pressurized water squeezing cannot be remotely controlled in actual production and must be manually operated. The present invention can achieve remote control and does not require manual operation. It can be widely used in dehydration treatment of domestic sewage, slurry, coal preparation plants, food processing, chemical industry, metal mines and other industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a schematic diagram of roller transmission.

[0017] Figure 3 It is a schematic diagram of the connection between the inclined push rod and the horizontal push rod.

[0018] Figure 4 It is the front view of the pressure roller group.

[0019] Figure 5 It is a top view of the pressure roller group.

[0020] Figure 6 It is a schematic diagram of the structure of the pressurizing device.

[0021] Figure 7 It is a schematic diagram of the structure of the press.

[0022] Figure 8 It is a schematic diagram of the structure of the guide part of the pressure roller group frame.

[0023] In the figure: 1-guide roller; 2-filter cloth; 3-filter tape; 4-vacuum box; 5-support roller; 6-filter cloth washing pipe; 7-filter driving drum; 8-discharging drum; 9-filter aid adding and stirring mechanism; 10-filter passive drum; 11-spring tensioning mechanism; 12-pressing passive drum; 13-hydraulic cylinder; 14-pressing cloth; 15-pressing tape; 16-horizontal push rod; 17-pressing roller group; 18-oblique push rod; 19-pressing cloth washing pipe; 20-driving device; 21-power chain; 22-pressing driving drum; 23-discharging chain; 24-hanging nose; 25-roller groove; 26-adjusting screw; 27-pressing roller group frame; 28-pressing roller; 29-roller seat; 30-roller; 31-positioning groove; 32-upper rack; 33-positioning column. DETAILED DESCRIPTION

[0024] Reference Figure 1-Figure 8The pressure-suction solid-liquid separator includes a filter, which has a frame. For the convenience of description, the feed end is set to the front and the discharge end is set to the rear. A filter driving drum 7 is set at the rear and a filter passive drum 10 is set at the front on the frame. A filter tape 3 is wound between the filter driving drum 7 and the filter passive drum 10. A vacuum box 4 with an upper opening is fixed on the frame. The vacuum box 4 is in the space formed by the upper and lower widths of the filter tape 3, and the upper opening of the vacuum box 4 is attached to the bottom surface of the upper width of the filter tape 3. A drainage pipe is connected to the bottom of the vacuum box 4, and the drainage pipe is connected to the air-water separator and then to the vacuum pump. A discharge drum 8 is arranged at the rear of the filter driving drum 7, and a filter cloth 2 is arranged around the filter belt 3 and the discharge drum 8. The upper part of the filter cloth 2 overlaps with the upper part of the filter belt 3, and the other part of the filter cloth 2 is tensioned and supported by the discharge drum 8 and the guide roller 1 arranged on the frame. The frame is provided with a filter cloth washing pipe 6 for the filter cloth 2, and a filter aid adding and stirring mechanism 9 is arranged above the front end of the filter belt 3; an upper frame 32 is fixedly connected to the upper rear part of the frame of the filter, and a pressurizing machine is arranged on the upper frame 32, and the pressurizing machine has a pressurizing machine arranged on the upper frame The press driving roller 22 on the press 32 and the press passive roller 12 that can move forward and backward, the bearing seat of the press tail roller 12 is connected with a spring tensioning mechanism 11, and the spring tensioning mechanism 11 can be simply understood as a tension spring added between the bearing seat of the press passive roller 12 and the upper frame 32, a press tape 15 is wound between the press driving roller 22 and the press passive roller 12, a press filter cloth 14 is wound around the outer periphery of the press tape 15, the lower width of the press filter cloth 14 is tightly attached to the press tape 15, the upper width of the press filter cloth 14 is supported by a plurality of guide rollers 1, and the outer side of the press filter cloth 14 is provided with a press filter The cloth flushing pipe 19, the pressurizing machine belt 15 and the filter belt 3 all have a plurality of through holes and grooves on the surface; a pressurizing device is installed on the upper frame 32 in the gap between the upper and lower widths of the pressurizing machine belt 15, and the pressurizing device has a plurality of roller groups 17 arranged along the length direction of the pressurizing machine belt 15, which are vertically guided and can move up and down, each roller group 17 is parallelly arranged with a plurality of rollers 28 perpendicular to the length direction of the pressurizing machine belt 15, and a roller group pressing device is also provided, each roller group 17 is connected to the roller group pressing device, and a plurality of supporting rollers 5 are arranged at the position corresponding to the roller group 17 below the upper width of the filter belt 3 of the filter.Sprockets are fixed to the ends of the central shafts of the filter drive drum 7, the discharge drum 8, and the press drive drum 22, respectively. A drive device 20 with a sprocket fixed to the output shaft is also provided. A power chain 21 is hung between the sprockets on the drive device 20, the filter drive drum 7, and the press drive drum 22. In order to achieve a wrap angle between the power chain 21 and the sprocket for reliable power transmission, an intermediate wheel can be added at an appropriate position to change the direction of the power chain 21. A discharge chain 23 is hung between the sprockets on the filter drive drum 22 and the discharge drum 8. The diameters of the filter drive drum 7, the press drive drum 22, and the discharge drum 8 are the same, and the diameters and the number of teeth of the sprockets connected between the three are equal to realize synchronous operation. The drive device 20 can be selected from electric motors, hydraulic motors, etc.

[0025] The pressing device of the pressing roller group has a horizontal push rod 16 which is located above the pressing roller group 17 and the guide device is movable on the upper frame 32. A hydraulic cylinder 13 is connected between one end of the horizontal push rod 16 and the upper frame 32, and a wedge-shaped pressing device is arranged between the horizontal push rod 16 and each pressing roller group 17. The wedge-shaped pressing device has an inclined push rod 18 corresponding to the number of the pressure roller group 17. The inclined push rod 18 is a strip-shaped body with a roller groove 25 opened along the length direction. One end of the inclined push rod 18 is hinged to a hanging nose 24 fixed on the bottom of the horizontal push rod 16, and the other end of the inclined push rod 18 is hinged to an adjusting screw 26. The threaded rod portion of the adjusting screw 26 passes through the strip through hole on the horizontal push rod 16, and the threaded rod portion of the adjusting screw 26 is located on both sides of the upper and lower sides of the horizontal push rod 16. Adjustment nuts are screwed, and the inclined push rod 18 is inclined relative to the horizontal direction; a roller seat 29 is fixed on the top surface of the pressure roller group 17, and a roller 30 is supported on the roller seat 29 through a wheel axle. The roller 30 is in the roller groove 25 of the inclined push rod 18 and its diameter is adapted to the width of the roller groove 25. The roller group 17 has a rectangular roller group frame 27, and a plurality of rollers 28 are arranged side by side at the bottom of the roller group frame 27. The rollers 28 are supported on the two side walls of the roller group frame 27 through roller shafts, and the arc surface of the bottom part of the rollers 28 is lower than the bottom surface of the periphery of the roller group frame 27. Vertical positioning grooves 31 are arranged alternately on the inner and outer sides of the roller group frame 27, and vertical positioning columns 33 are fixed on the upper frame 32. The positioning columns 33 are correspondingly stuck in the positioning grooves 31 to guide the roller group frame 27, as shown in FIG. Figure 8 The U-shaped card is fixed on the beam of the upper frame 32, and the horizontal push rod 16 is positioned and guided by the U-shaped card and can move forward and backward relative to the U-shaped card, see Figure 7 The horizontal guide of the horizontal push rod 16 may also adopt other common guide rail forms, for example, a V-shaped guide linear track is provided between the horizontal push rod 16 and the upper frame 32 .

[0026] During operation, the slurry after adding the filter aid through the filter aid adding and stirring mechanism 9 is spread on the filter cloth 2 of the filter and enters the negative pressure water absorption area of ​​the filter; the filter cloth 2 of the filter and the filter belt 3 operate synchronously, and the filter belt 3 has holes in the middle connected to the vacuum box 4, and the vacuum box 4 is connected to the vacuum pump through the gas-water separator. The negative pressure generated by the vacuum pump absorbs the moisture in the slurry, and the negative pressure water absorption runs through the entire dehydration process of this equipment; the slurry moves with the filter cloth 2 of the filter, forms a cake, enters the bottom of the press, is wrapped between the filter cloth 2 of the filter and the press cloth 14, and enters the pressure suction dehydration area, and multiple groups of pressure rollers 17 press the press belt 15 downward, and form a clamping force under the action of the filter support roller 5, so that the cake is quickly and significantly squeezed and dehydrated, and at the same time cooperates with the negative pressure water absorption, the squeezed and sucked moisture is sucked away by the vacuum pump, and the negative pressure water absorption and pressurized water squeezing are organically integrated into one device, which solves the problems of high moisture content of the product and inability to produce continuously.

Claims

1. A pressure-suction solid-liquid separator, comprising a filter, the filter having a frame, characterized in that: A filter driving drum (7) at the rear and a filter passive drum (10) at the front are arranged on the frame, a filter tape (3) is wound between the filter driving drum (7) and the filter passive drum (10), a discharge drum (8) is arranged on the frame at the rear of the filter driving drum (7), a filter cloth (2) is arranged around the filter tape (3) and the discharge drum (8), the upper part of the filter cloth (2) and the overlapping part of the upper part of the filter tape (3) are attached thereto, and the other part of the filter cloth (2) is tensioned and supported by the discharge drum (8) and the guide roller (1) arranged on the frame; an upper frame (32) is fixedly connected to the upper rear part of the filter frame, and the upper frame (3 2) is provided with a pressurizing machine, the pressurizing machine comprises a pressurizing machine driving roller (22) provided on an upper frame (32) and a pressurizing machine passive roller (12) which can move forward and backward, the bearing seat of the pressurizing machine passive roller (12) is connected with a spring tensioning mechanism (11), a pressurizing machine belt (15) is wound between the pressurizing machine driving roller (22) and the pressurizing machine passive roller (12), a pressurizing machine filter cloth (14) is wound around the outer periphery of the pressurizing machine belt (15), the lower width of the pressurizing machine filter cloth (14) is closely attached to the pressurizing machine belt (15), the upper width of the pressurizing machine filter cloth (14) is supported by a plurality of guide rollers (1), and the pressurizing machine driving roller (22) is connected with a rotating power; on the upper frame (32), the pressurizing machine belt (15) is located at the upper and lower widths. A pressurizing device is installed in the gap, the pressurizing device has a plurality of roller groups (17) arranged along the length direction of the pressurizing machine belt (15), which are vertically guided and can move up and down. Each roller group (17) is parallel to a plurality of rollers (28) perpendicular to the length direction of the pressurizing machine belt (15), and there is also a roller group pressing device. Each roller group (17) is connected to the roller group pressing device. A plurality of supporting rollers (5) are arranged at the position corresponding to the roller group (17) below the upper width of the filter belt (3) of the filter. The roller group pressing device has a horizontal push rod (16) above the roller group (17) and the guide device is movable on the upper frame (32). A push rod (16) is connected between one end of the horizontal push rod (16) and the upper frame (32). A hydraulic cylinder (13) is provided with a wedge-shaped pressing device between the horizontal push rod (16) and each pressure roller group (17); the wedge-shaped pressing device has inclined push rods (18) corresponding to the number of the pressure roller groups (17); the inclined push rods (18) are strip-shaped bodies with roller grooves (25) opened along the length direction; one end of the inclined push rod (18) is hinged to a hanging nose fixed on the bottom of the horizontal push rod (16); the other end of the inclined push rod (18) is hinged to an adjusting screw (26); the threaded rod portion of the adjusting screw (26) passes through a strip-shaped through hole on the horizontal push rod (16); and adjusting nuts are screwed on both sides of the threaded rod portion of the adjusting screw (26) located on the upper and lower sides of the horizontal push rod (16); the inclined push rod (18) is in an inclined state relative to the horizontal direction;A roller seat (29) is fixed on the top surface of the roller group (17), and a roller (30) is supported on the roller seat (29) through a wheel shaft. The roller (30) is located in the roller groove (25) of the inclined push rod (18) and its diameter is adapted to the width of the roller groove (25); the roller group (17) has a rectangular roller group frame (27), and a plurality of rollers (28) are arranged side by side at the bottom of the roller group frame (27). The rollers (28) are supported on the two side walls of the roller group frame (27) through roller shafts, and the arc surface of the bottom part of the rollers (28) is lower than the bottom surface of the periphery of the roller group frame (27); and vertical positioning grooves (31) are arranged alternately on the inner and outer side edges of the roller group frame (27) for cooperating with the vertical positioning columns (33) on the upper frame (32).

2. The pressure-suction solid-liquid separator according to claim 1, characterized in that: A vacuum box (4) with an upper opening is fixed on the frame. The vacuum box (4) is located in a space formed by the upper and lower webs of the filter tape (3). The upper opening of the vacuum box (4) is attached to the bottom surface of the upper web of the filter tape (3). A drainage pipe is connected to the bottom of the vacuum box (4). A filter cloth washing pipe (6) for the filter cloth (2) of the filter is provided on the frame.

3. The pressure-suction solid-liquid separator according to claim 1, characterized in that: Sprockets are fixed to the ends of the central axes of the filter driving drum (7), the discharge drum (8) and the press driving drum (22), respectively. A driving device (20) is further provided with a sprocket fixed to the output shaft. A power chain (21) is hung between the sprockets on the driving device (20), the filter driving drum (7) and the press driving drum (22), and a discharge chain (23) is hung between the sprockets on the filter driving drum (7) and the discharge drum (8).

4. The pressure-suction solid-liquid separator according to claim 3, characterized in that: The filter driving drum (7), the press driving drum (22) and the discharge drum (8) have the same diameter, and the diameter and number of teeth of the sprocket wheels connected thereto are equal.

5. The pressure-suction solid-liquid separator according to claim 1, characterized in that: A pressurizer filter cloth flushing pipe (19) is provided on the outer side of the pressurizer filter cloth (14).

Images