Solid-liquid separation device for sludge in concentrated culture wastewater

Abstract

The utility model relates to a solid-liquid separation device for concentrated culture wastewater sludge, which comprises a dehydration barrel, a plurality of dehydration holes arranged on the dehydration barrel, a spiral extrusion mechanism arranged in the dehydration barrel, a feed bin arranged at the top of one end of the dehydration barrel, a discharge port arranged at the other end of the dehydration barrel, and a liquid collection tank arranged below the dehydration barrel. A sludge collecting tank is arranged below the discharging port, a check block is arranged in the discharging port, a vertical supporting plate is arranged outside the discharging port, a horizontal guide rod is arranged on the side face, facing the check block, of the supporting plate, the guide rod penetrates through the check block and is in sliding fit with the check block, and a spring is arranged between the supporting plate and the check block. According to the sludge dewatering device, only when the compression length of the spring reaches a set value, the check block can be separated from the discharging port, sludge can be discharged, the compression length of the spring is determined by the pressure borne by the sludge, enough pressure must be applied to the sludge to enable the compression length of the spring to reach the set value, and therefore the dewatering rate of the sludge can be guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of dehydration equipment, in particular to a solid-liquid separation device for concentrated aquaculture wastewater sludge. Background Art

[0002] The wastewater from the breeding farm will produce a large amount of sludge with feces every day. The feces are rich in organic matter and can be used as high-quality organic fertilizer after sterilization. The sludge separated from the wastewater also contains a large amount of water, so the sludge needs to be dehydrated first and then fermented and sterilized. At present, the commonly used solid-liquid separation device for concentrated breeding wastewater sludge is a spiral extrusion device, such as CN201621242793.9-Spiral extrusion feces dehydrator, CN201821071694.8-A kind of poultry and livestock feces liquid dehydration mechanism and poultry and livestock feces liquid dehydration device including it and CN201920220557.4-A kind of feces dehydration equipment for livestock breeding farms and other prior arts. At present, these spiral dehydration equipments are used to add feces to the extrusion cylinder, and the extrusion cylinder is provided with a water filter hole. The spiral extrusion sheet is used to drive the feces to move along the axial direction of the extrusion cylinder, and the water is squeezed out at the same time, and the dehydrated feces are removed. Spiral dehydration equipment can achieve continuous dehydration, but the dehydration rate cannot be guaranteed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a concentrated aquaculture wastewater sludge solid-liquid separation device which can ensure the dehydration rate.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is: a solid-liquid separation device for concentrated aquaculture wastewater sludge, comprising a horizontally arranged dehydration cylinder, a plurality of dehydration holes are arranged on the dehydration cylinder, a spiral extrusion mechanism is arranged in the dehydration cylinder, a feed bin is arranged on the top of one end of the dehydration cylinder, a discharge port is arranged on the other end, a liquid collecting tank is arranged below the dehydration cylinder, and a mud collecting tank is arranged below the discharge port.

[0005] A stopper that slides with the side wall of the discharge port is arranged inside the discharge port, a vertical support plate is arranged outside the discharge port, a horizontal guide rod is arranged on the side of the support plate facing the stopper, the guide rod passes through the stopper and slides with the stopper, and a spring is arranged between the support plate and the stopper.

[0006] Furthermore, a pressure sensor is arranged between the spring and the support plate, the support plate is slidably arranged on the support platform, and the support plate is connected to an adjustment mechanism for adjusting the horizontal position of the support plate, and the adjustment mechanism and the pressure sensor are both connected to a controller.

[0007] Furthermore, the adjusting mechanism is a hydraulic cylinder.

[0008] Furthermore, the spiral extrusion mechanism includes a driving motor, a rotating shaft and a spiral extrusion sheet, wherein the spiral extrusion sheet is mounted on the rotating shaft, and one end of the rotating shaft is connected to the driving motor.

[0009] Furthermore, a bracket is arranged above the feed bin, a vertical rod which is slidably matched with the bracket is arranged on the bracket, and the vertical rod is connected to a lifting mechanism.

[0010] Furthermore, the lifting mechanism is a linear motor.

[0011] Furthermore, the inner diameter of the dewatering cylinder between the feed bin and the discharge port decreases in the sludge moving direction.

[0012] Furthermore, an air suction fan is arranged beside the feed bin, the liquid collecting tank and the mud collecting tank, and the air suction fan is connected to a deodorizing mechanism through a pipeline.

[0013] The beneficial effects of the utility model are as follows: the utility model uses an axially movable block to close the discharge port. During extrusion and dehydration, the spiral extrusion mechanism applies an extrusion force to the sludge. When the pressure is transmitted to the block, the block is pushed to move. When the block moves, the spring is compressed. When the block moves outside the discharge port, the spring is compressed to the maximum, and the dehydrated sludge can be discharged through the discharge port. In the utility model, only when the compression length of the spring reaches the set value, the block will be separated from the discharge port (that is, the discharge port will be opened), and the sludge can be discharged. The compression length of the spring is determined by the pressure on the sludge. In order to make the compression length of the spring reach the set value, sufficient pressure must be applied to the sludge, so the dehydration rate of the sludge can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a main schematic diagram of the utility model;

[0015] Figure numerals: 1—dehydration cylinder; 2—feed bin; 3—discharge port; 4—liquid collecting tank; 5—block; 6—support plate; 7—guide rod; 8—mud collecting tank; 9—spring; 10—pressure sensor; 11—drive motor; 12—rotating shaft; 13—spiral extrusion sheet; 14—bracket; 15—vertical pole; 16—lifting mechanism; 17—intake fan; 18—deodorization mechanism; 19—support platform; 20—adjustment mechanism; 21—controller. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] The utility model is a device for concentrating aquaculture wastewater sludge solid-liquid separation, such as Figure 1As shown, it includes a horizontally arranged dehydration cylinder 1, on which a plurality of dehydration holes are arranged, a spiral extrusion mechanism is arranged inside the dehydration cylinder 1, a feed bin 2 is arranged at the top of one end of the dehydration cylinder 1, a discharge port 3 is arranged at the other end, a liquid collecting trough 4 is arranged below the dehydration cylinder 1, and a mud collecting trough 8 is arranged below the discharge port 3.

[0018] The dewatering cylinder 1 is a metal cylinder, one end of which is sealed by an end plate, and the other end is open and serves as a discharge port 3. The dewatering cylinder 1 can be installed horizontally through a support frame so that it has a suitable height, so that the liquid collecting tank 4 can be installed below. The liquid collecting tank 4 is used to collect the water squeezed out from the sludge. Specifically, various shapes of boxes, barrels, and other containers that can be used to hold liquids can be used. In order to facilitate the movement of the liquid collecting tank 4, rollers can be set at the bottom of the liquid collecting tank 4, or a pump can be set in the liquid collecting tank 4, so that the collected waste liquid can be transported to the sewage treatment equipment. The feed bin 2 is used to inject the sludge into the dewatering cylinder 1. A truncated cone or prism-shaped shell with a large upper end and a small lower end can be used, and its bottom is connected to the inner cavity of the dewatering cylinder 1. The mud collecting tank 8 is used to collect the dehydrated sludge. Various existing containers can be used. In order to facilitate the movement of the mud collecting tank 8, a group of rollers can be set at the bottom of the mud collecting tank 8. The spiral extrusion mechanism is used to push the sludge in the dewatering cylinder 1 to move axially, and can also provide extrusion force to squeeze out the water in the sludge.

[0019] A stopper 5 is provided inside the discharge port 3 and is slidably engaged with the side wall of the discharge port 3. A vertical support plate 6 is provided outside the discharge port 3. A horizontal guide rod 7 is provided on the side of the support plate 6 facing the stopper 5. The guide rod 7 passes through the stopper 5 and is slidably engaged with the stopper 5. A spring 9 is provided between the support plate 6 and the stopper 5.

[0020] The discharge port 3 is circular, the block 5 is cylindrical, the support plate 6 can be a square plate or a circular plate, the guide rod 7 is a cylindrical rod, one end of the guide rod 7 is welded to the support plate 6, and the other end is slidably matched with the block 5. The guide rod 7 plays a guiding and positioning role to ensure that the block 5 can stably enter and exit the discharge port 3. The spring 9 is used to provide discharge resistance. Since the block 5 is in the discharge port 3, the discharge port 3 is closed. To discharge the dehydrated sludge from the discharge port 3, the block 5 must be pushed to move outside the discharge port 3. During the outward movement of the block 5, the spring 9 is gradually compressed to generate elastic force. During dehydration, the spiral extrusion mechanism applies pressure to the sludge, and the pressure is transmitted to the block 5 through the sludge, and then to the spring 9. Therefore, the compression amount of the spring 9 is related to the pressure applied by the spiral extrusion mechanism to the sludge. Only when the pressure applied by the spiral extrusion mechanism to the sludge reaches the requirement, the spring 9 has enough compression to make the block 5 move outside the discharge port 3, and the sludge can be discharged through the discharge port 3. When the pressure on the sludge decreases, the stopper 5 re-enters the discharge port 3 under the action of the spring 9 .

[0021] It can be seen that in the present invention, the discharge port 3 will be opened only when the pressure on the sludge reaches the requirement, thereby ensuring the dehydration rate of the sludge.

[0022] The support plate 6 can be fixedly installed, but after being fixedly installed, it is difficult to adjust the pressure on the sludge when it is discharged, that is, the dehydration rate cannot be adjusted. In the utility model, as a preferred embodiment, a pressure sensor 10 is arranged between the spring 9 and the support plate 6, the support plate 6 is slidably arranged on the support platform 19, and the support plate 6 is connected to an adjustment mechanism 20 for adjusting the horizontal position of the support plate 6, and the adjustment mechanism 20 and the pressure sensor 10 are both connected to a controller 21.

[0023] The pressure sensor 10 can be made of the existing technology, and can detect the pressure on the spring 9 and transmit the pressure signal to the controller 21. The controller 21 can determine the pressure on the sludge according to the pressure signal, and ensure that the sludge is discharged only after being squeezed under the set pressure. The support platform 19 can be a metal platform. In order to ensure the stability of the support plate 6 when sliding, a slide rail can be set on the upper surface of the support platform 19, and the support plate 6 is set on the slide rail. The sliding direction of the support plate 6 is consistent with the axial direction of the dewatering cylinder 1. When it is necessary to increase the pressure on the sludge, the adjustment mechanism 20 can be used to drive the support plate 6 to move in the direction of the dewatering cylinder 1. The support plate 6 pushes the stopper 5 to move an appropriate distance toward the inside of the dewatering cylinder 1 through the spring 9. At this time, when the sludge is discharged, the compression of the spring 9 is greater, so a greater pressure is required. When it is necessary to reduce the pressure on the sludge, the adjustment mechanism 20 can be used to drive the support plate 6 to move in the direction away from the dewatering cylinder 1. The support plate 6 pushes the stopper 5 to move through the spring 9. At this time, when the sludge is discharged, the compression of the spring 9 is smaller, so a smaller pressure is required. When performing the above adjustment, the sludge in the dewatering cylinder 1 can be emptied first. During the sludge dewatering process, the adjustment mechanism 20 supports the support plate 6 to prevent the support plate 6 from sliding. The adjustment mechanism 20 can be an existing device such as a hydraulic cylinder.

[0024] The rotary extrusion mechanism of the utility model includes a driving motor 11, a rotating shaft 12 and a spiral extrusion sheet 13. The spiral extrusion sheet 13 is mounted on the rotating shaft 12, and one end of the rotating shaft 12 is connected to the driving motor 11. The rotating shaft 12 is mounted on the end plate of the dehydration cylinder 1 through a bearing. In order to improve the stability of the rotating shaft 12, a mounting plate can be arranged outside the dehydration cylinder 1, and the rotating shaft 12 is mounted on the mounting plate through a bearing, and the rotating shaft 12 located inside the dehydration cylinder 1 is suspended. The driving motor 11 is arranged outside the dehydration cylinder 1, and can be connected to the rotating shaft 12 through a transmission mechanism such as a gear and a coupling, so as to drive the rotating shaft 12 to rotate. The spiral extrusion sheet 13 is fixed on the rotating shaft 12, and can rotate with the rotating shaft 12. The edge of the spiral extrusion sheet 13 is matched with the inner wall of the dehydration cylinder 1. When the spiral extrusion sheet 13 rotates, a thrust can be applied to the sludge in the dehydration cylinder 1, and the water content in the sludge can be squeezed out while pushing the sludge to move.

[0025] Since the fluidity of the sludge is not strong, it is difficult for the sludge stored in the feed bin 2 to automatically enter the dewatering cylinder 1 evenly and stably. In the utility model, a bracket 14 is arranged above the feed bin 2, and a vertical rod 15 is arranged on the bracket 14 to slide with the bracket 14, and the vertical rod 15 is connected to a lifting mechanism 16. The lifting mechanism 16 drives the vertical rod 15 to rise and fall at a uniform speed. When the vertical rod 15 falls, the sludge in the feed bin 2 can be pushed into the dewatering cylinder 1, thereby ensuring that the sludge enters the dewatering cylinder 1 evenly and stably.

[0026] The lifting mechanism 16 is a linear motor, and can also be a cylinder, a hydraulic cylinder or other equipment.

[0027] In order to ensure the dehydration effect, the inner diameter of the dehydration cylinder 1 between the feed bin 2 and the discharge port 3 decreases in the direction of sludge movement. As the sludge moves, the space in the dehydration cylinder 1 gradually decreases, the sludge is gradually compacted, and the squeezing force on the sludge gradually increases, which can promote faster dehydration of the sludge and improve dehydration efficiency.

[0028] Since sludge, manure and the like contain a large amount of malodorous substances, these substances directly enter the air and cause adverse effects on the environment. Therefore, the utility model is provided with an air suction fan 17 beside the feed bin 2, the liquid collecting tank 4 and the mud collecting tank 8, and the air suction fan 17 is connected to the deodorization mechanism 18 through a pipeline. The air suction fan 17 can suck in the air containing malodorous gases near the feed bin 2, the liquid collecting tank 4 and the mud collecting tank 8 and transport it to the deodorization mechanism 18. The air is deodorized by the deodorization mechanism 18 and then emptied to prevent environmental pollution. The deodorization mechanism 18 can be a treatment box, and an activated carbon filler layer is arranged inside the treatment box to absorb the malodorous gases using the activated carbon.

[0029] Since sludge and manure contain a large amount of pollutants, some of which are highly corrosive, the surfaces of the dehydration cylinder 1, the feed bin 2, the rotating shaft 12 and the spiral extrusion sheet 13 used in the utility model are coated with anti-corrosion paint.

[0030] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A device for solid-liquid separation of concentrated aquaculture wastewater sludge, comprising a horizontally arranged dewatering cylinder (1), a plurality of dewatering holes being arranged on the dewatering cylinder (1), a spiral extrusion mechanism being arranged inside the dewatering cylinder (1), a feed bin (2) being arranged at the top of one end of the dewatering cylinder (1), and a discharge port (3) being arranged at the other end, a liquid collecting trough (4) being arranged below the dewatering cylinder (1), and a sludge collecting trough (8) being arranged below the discharge port (3), characterized in that: A stopper (5) is arranged inside the discharge port (3) and is slidably engaged with the side wall of the discharge port (3); a vertical support plate (6) is arranged outside the discharge port (3); a horizontal guide rod (7) is arranged on the side of the support plate (6) facing the stopper (5); the guide rod (7) passes through the stopper (5) and is slidably engaged with the stopper (5); and a spring (9) is arranged between the support plate (6) and the stopper (5).

2. The concentrated aquaculture wastewater sludge solid-liquid separation device according to claim 1, characterized in that: A pressure sensor (10) is arranged between the spring (9) and the support plate (6); the support plate (6) is slidably arranged on the support platform (19); the support plate (6) is connected to an adjustment mechanism (20) for adjusting the horizontal position of the support plate (6); and the adjustment mechanism (20) and the pressure sensor (10) are both connected to a controller (21).

3. The concentrated aquaculture wastewater sludge solid-liquid separation device according to claim 2, characterized in that: The adjusting mechanism (20) is a hydraulic cylinder.

4. The concentrated aquaculture wastewater sludge solid-liquid separation device according to claim 1, characterized in that: The spiral extrusion mechanism comprises a driving motor (11), a rotating shaft (12) and a spiral extrusion sheet (13); the spiral extrusion sheet (13) is mounted on the rotating shaft (12); one end of the rotating shaft (12) is connected to the driving motor (11).

5. The concentrated aquaculture wastewater sludge solid-liquid separation device according to claim 1, characterized in that: A bracket (14) is arranged above the feed bin (2), and a vertical rod (15) which is slidably matched with the bracket (14) is arranged on the bracket (14), and the vertical rod (15) is connected to a lifting mechanism (16).

6. The solid-liquid separation device for concentrated aquaculture wastewater sludge according to claim 5, characterized in that: The lifting mechanism (16) is a linear motor.

7. The concentrated aquaculture wastewater sludge solid-liquid separation device according to claim 1, characterized in that: The inner diameter of the dewatering cylinder (1) between the feed bin (2) and the discharge port (3) decreases in the direction of sludge movement.

8. The concentrated aquaculture wastewater sludge solid-liquid separation device according to claim 1, characterized in that: An air suction fan (17) is arranged beside the feed bin (2), the liquid collecting tank (4) and the mud collecting tank (8), and the air suction fan (17) is connected to a deodorizing mechanism (18) through a pipeline.

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