Layered and graded solid-liquid separation device

Abstract

The utility model discloses a layered and graded solid-liquid separation device, and belongs to the technical field of environmental protection. The whole device is a multi-stage separation box, the upper part of a box body of the multi-stage separation box is of a cuboid structure, the lower part of the box body of the multi-stage separation box is of a structure with a conical section, the left side is provided with a dosing device, the bottom of the right side is provided with a sludge discharge port, separated precipitates are recycled to a belt conveyor for utilization, and the tops of the front side and the rear side are respectively provided with a feed port and an overflow port; the feed port is mainly used for receiving a solid-liquid mixture, and clear water separated from the mixture in the separation device flows out of the overflow port to the lower part for recycling; the interior of the multi-stage separation box is divided into a plurality of spaces by partition plates; the partition plates comprise the transverse partition plate and the longitudinal partition plate, and the transverse partition plate and the longitudinal partition plate are vertically arranged in the box body. The device is simple in structure, high in reliability, free of maintenance, small in investment and capable of remarkably reducing throwing of materials attached to the return belt, reducing the cleaning workload and eliminating 3D posts, and therefore the production process requirements are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a layered grading solid-liquid separation device and belongs to the field of environmental protection technology. BACKGROUND

[0002] In industrial production practice, there are many process sites that need to recycle the precipitate and clean water after solid-liquid separation, especially on many belt conveyors in harsh environments and heavy workloads, such as the return belt of the belt conveyor in a steel enterprise.

[0003] Under the background of energy saving and environmental protection and elimination of 3D posts, the material throwing and scattering of the return belt of the belt conveyor is a big problem that needs to be solved urgently. The belt conveyor is one of the main equipment for material conveying in the steel industry, and the adhesion material of the return belt of the belt conveyor needs a device that can be recycled and has low investment cost. In order to improve this situation, the existing method is to install a return belt cleaning device under the return belt. The solid-liquid separation effect is not good, the precipitation of each tank is not good, the solid-liquid mixture directly enters the last stage of the sedimentation tank from the lower part of the tank, the water for recycling contains a large amount of particulate matter, the water consumption is large, the equipment is severely worn, and a simple and efficient belt conveyor return belt cleaning device is urgently needed to meet the requirements of process, environmental protection and energy saving. UTILITY MODEL CONTENTS

[0004] In order to overcome the above-mentioned shortcomings, the utility model provides a layered grading solid-liquid separation device, which realizes the purpose of cleaning the return belt, reduces the adhesion material scattering of the return belt, reduces the cleaning workload, eliminates the 3D post, improves the quality of the on-site environment, and meets the requirements of related process technology, environmental protection and energy saving in the production process.

[0005] The utility model mainly collects and separates the solid-liquid precipitation and achieves the requirements of recycling the precipitate and recycling the clean water after precipitation.

[0006] The utility model adopts the technical scheme: a layered grading solid-liquid separation device, the whole device is a multistage separation tank, the upper part of the multistage separation tank is a cuboid structure, the lower part is a structure with a conical cross section, a dosing device is arranged on the left side, different components of flocculants are selected according to the characteristics of the solid-liquid mixture to separate the solid-liquid mixture, a mud discharge port is arranged at the bottom of the right side, the separated precipitate is recycled to the belt conveyor for utilization, and a feed inlet and an overflow port are arranged at the top of the front side and the rear side respectively; the feed inlet mainly receives the solid-liquid mixture, the clean water separated from the mixture in the separation device flows out from the overflow port and is recycled to the lower part, and can be used for cleaning the belt; the inside of the multistage separation tank is divided into a plurality of spaces by a partition plate; the partition plate comprises a horizontal partition plate and a vertical partition plate, and the horizontal partition plate and the vertical partition plate are vertically arranged in the tank.

[0007] The two adjacent separation tanks are separated by a transverse partition, and n transverse partitions divide the multi-stage separation tank into n+1 separation tanks, the height of each transverse partition is different, and the height of the first-stage partition, the second-stage partition,..., and the n-stage partition is sequentially set as the height of the first-stage partition near the inlet, the height of the last-stage partition near the overflow port, and the height of the remaining transverse partitions is slightly higher than the height of the first-stage partition and the last-stage partition by 3 cm; the first-stage partition is longitudinally divided into left and right sides, and the height of the first-stage partition near the inlet (right side) is slightly lower than the height of the first-stage partition far from the inlet; the second-stage separation tank is provided with a longitudinal partition and a buffer device in the middle of the separation tank, and the buffer device is arranged on the right side of the longitudinal partition; the third-stage separation tank is provided with a longitudinal partition in the middle, and the buffer device is arranged on the left side of the longitudinal partition, that is, the position of the buffer device changes left and right in the subsequent stage separation tank.

[0008] Further, the buffer device is a hollow speed reduction plate, which is uniformly provided with holes on a stainless steel plate to filter and slow down the water flow speed; the liquid flow speed between the adjacent two separation tanks is reduced, which is beneficial to the precipitation of the substances with large specific gravity in the liquid.

[0009] Further, the transverse partition is a stainless steel plate, and the longitudinal partition is a polyethylene plate.

[0010] Further, the height difference between the left and right sides of the first-stage partition is 5 cm, that is, the left first-stage partition is 5 cm higher than the right first-stage partition; similarly, the height difference between the left and right sides of the second-stage partition is also 5 cm, but the left second-stage partition is the water inlet side, and the left second-stage partition is 5 cm lower than the right second-stage partition, and so on; the transverse partition is divided into left and right sides according to the setting surface of the longitudinal partition.

[0011] Further, the longitudinal partition is arranged on the longitudinal center line of the separation tank, and the height of the longitudinal partition is 3 cm lower than the highest side of the adjacent transverse partition; the lower part of the longitudinal partition in the second-stage separation tank is inclined to the left side by 20°, and the lower part of the longitudinal partition in the third-stage separation tank is inclined to the right side by 20°, and the inclination direction alternately changes, so that the inclination direction of the lower part of the longitudinal partition in the last-stage separation tank is on the same side as the overflow port. The inclination direction of the longitudinal partition is consistent with the direction of the water flow (S type), and the inclination angle is 20° with the vertical direction.

[0012] Further, the height of the overflow port of the last-stage separation tank is equal to the height of the inlet of the first-stage separation tank and is installed on the side with higher height of the partition.

[0013] Further, a sewage spiral slurry pump is installed at the bottom of the multi-stage separation tank, and an electric valve is arranged at the outlet of the spiral slurry pump; the sewage spiral slurry pump is operated, and the electric valve is opened to discharge the sludge to the belt conveyor for recycling and production; when the spiral slurry pump is stopped, the electric valve is closed.

[0014] The device is installed above the belt to be cleaned, and the longitudinal center line of the device is located above the center line of the belt to be cleaned; that is, the solid-liquid mixture collected after the return belt is cleaned is separated in the first separation tank of the layered and graded solid-liquid separation device, and the substances with a larger specific gravity in the mixture are difficult to precipitate due to the fast flow rate of the liquid; when the first separation tank is full, the solid-liquid mixture overflows into the second separation tank; the mixture with a larger specific gravity enters the second separation tank from the side with a lower height of the partition plate, and the relatively clear mixture enters the second separation tank from the side with a higher height of the partition plate; due to the pressure problem, the mixture with a larger specific gravity flows fast, and therefore, a speed reduction device is additionally arranged to reduce the flow rate and facilitate precipitation.

[0015] The separation principle of the device is as follows: after the mixture in the solid-liquid collection tank enters the separation device, the particles with different specific gravities are forced to precipitate in different precipitation tanks in the process of flowing with water due to the different heights of the horizontal and vertical partition plates, so that the water for recycling does not contain particles after sufficient precipitation, the uppermost water after separation is returned to the collection tank below the return belt for recycling, the circulating water of the system is clear, the service life of the circulating system equipment can be prolonged, the water consumption is reduced to the minimum, the precipitates are recycled to the belt conveyor for production, and finally, the related requirements of the process system are met.

[0016] The layered and graded solid-liquid separation device provided by the utility model has the following beneficial effects:

[0017] (1) The device has simple structure, high reliability, zero maintenance, small investment, can significantly reduce the adhesion and scattering of materials on the return belt, reduce the cleaning workload, eliminate the 3D post, and further meet the production process requirements; the device can be applied to various places in the factory that need to clean dust and collect and utilize, which not only reduces the labor of the post personnel but also improves the on-site environment;

[0018] (2) Considering the inspiration of different cross-sectional areas, different pressures, and different specific gravities of different materials, the layered separation device is designed in the form of different cross-sectional areas of the water tank and different heights of the partition plate;

[0019] (3) Based on the actual situation of the production operation process, this device innovatively adds a hollow speed-reducing plate. By increasing the area of ​​the outlet through the hollow plate, the water flow velocity is reduced, and the particles settle from the hollow part, thereby ensuring that the solid and liquid are fully separated and settled.

[0020] (4) In this device, by using different heights of the transverse partitions and a 20° tilt angle of the longitudinal partitions, it is fully guaranteed that the precipitates will not communicate with each other from the lower connection point, thus making the solid-liquid separation effect worse.

[0021] (5) The detection device for the sediment level in this device ensures that the sediment in the last box is always kept at a height of 300mm, thus ensuring the sealing effect of the spiral mud pump and the life of the device.

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 for Figure 1 The left view;

[0025] Figure 3 for Figure 1 Top view.

[0026] In the diagram: 1 is the dosing device, 2 is the feed inlet, 3 is the overflow outlet, 4 is the sludge discharge outlet, 5 is the transverse baffle, 6 is the longitudinal baffle, 7 is the spiral slurry pump, 8 is the buffer device, and 9 is the separation box. Detailed Implementation

[0027] Example

[0028] like Figures 1-3 As shown, this utility model provides a multi-stage solid-liquid separation device. The device is a multi-stage separation box. The upper part of the multi-stage separation box has a cuboid structure, and the lower part has a conical cross-section. A dosing device 1 is provided on the left side. Different flocculants with different components are selected according to the characteristics of the solid-liquid mixture to separate the solid and liquid. A sludge discharge port 4 is provided at the bottom right side to recover the separated sediment to the belt conveyor for reuse. The front and rear top sides are respectively provided with a feed port 2 and an overflow port 3. The feed port 2 is mainly for receiving the solid-liquid mixture. The clear water separated in the separation device flows out from the overflow port 3 to the lower part for recovery and can be used to clean the belt. The interior of the multi-stage separation box is divided into several spaces by partitions. The partitions include transverse partitions 5 and longitudinal partitions 6.

[0029] The two adjacent separation tanks are separated by the transverse partition 5, and n transverse partitions 5 divide the multi-stage separation tank into n+1 separation tanks 9. The height of each transverse partition 5 is different, and is sequentially set as a first-stage partition, a second-stage partition, and so on from the inlet. The design principle is that the height of the first-stage partition near the inlet and the height of the last-stage partition of the overflow port are equal, and the heights of the remaining transverse partitions are slightly higher than those of the first-stage and last-stage partitions by 3 cm. The first-stage partition is longitudinally divided into left and right sides, and the height of the first-stage partition near the inlet (right side) is slightly lower than that of the first-stage partition far from the inlet. The second-stage separation tank and the subsequent separation tanks are each provided with a longitudinal partition 6 and a buffer device 8. The buffer device is arranged on the right side of the longitudinal partition in the second-stage separation tank, and the longitudinal partition 6 is arranged in the third-stage separation tank. The buffer device 8 is arranged on the left side of the longitudinal partition in the third-stage separation tank, and the position of the buffer device changes from left to right in the subsequent separation tanks.

[0030] Further, the buffer device 8 is a hollow speed reduction plate. The structure is that a stainless steel plate is uniformly provided with holes to filter and slow down the water flow. The liquid flow rate between the adjacent two separation tanks is reduced, which is beneficial to the precipitation of the substances with large specific gravity in the liquid.

[0031] Further, the transverse partition 5 is a stainless steel plate, and the longitudinal partition 6 is a polyethylene plate.

[0032] Further, the height difference between the left and right sides of the first-stage partition is 5 cm, that is, the left first-stage partition is 5 cm higher than the right first-stage partition. Similarly, the height difference between the left and right sides of the second-stage partition is also 5 cm, but the left second-stage partition is the water inlet side, and the left second-stage partition is 5 cm lower than the right second-stage partition. Similarly, the transverse partition is divided into left and right sides according to the arrangement surface of the longitudinal partition.

[0033] Further, the longitudinal partition 6 is arranged on the longitudinal center line of the separation tank 9, and the height of the longitudinal partition is 3 cm lower than the highest side of the adjacent transverse partition. The lower part of the longitudinal partition in the second-stage separation tank is inclined to the left by 20°, and the lower part of the longitudinal partition in the third-stage separation tank is inclined to the right by 20°. The inclination directions of the longitudinal partitions in the subsequent separation tanks are alternately changed, and the inclination direction of the lower part of the longitudinal partition in the last-stage separation tank is on the same side as the overflow port. The inclination direction of the longitudinal partition is consistent with the water flow direction (S type), and the inclination angle is 20° with the vertical direction.

[0034] Further, the height of the overflow port 3 of the last-stage separation tank is equal to that of the inlet of the first-stage separation tank and is arranged on the side with higher height of the partition.

[0035] Further, a sludge spiral mud pump 7 is installed at the bottom of the multi-stage separation tank, and an electric valve is arranged at the outlet of the spiral mud pump 7. When the sludge spiral mud pump 7 is running, the electric valve is opened to discharge sludge to the belt conveyor for recycling, and the spiral mud pump is stopped to close the electric valve.

[0036] The device is installed above the belt conveyor to be cleaned, and the longitudinal center line of the device is located above the center line of the belt conveyor to be cleaned. That is, after the solid-liquid mixture after the return belt is cleaned is collected and separated by the layered and staged solid-liquid separation device, the mixture with a large specific gravity is difficult to precipitate due to the fast flow rate of the liquid. When the first-stage separation tank is full, the solid-liquid mixture overflows into the second-stage separation tank. The mixture with a large specific gravity enters the second-stage separation tank from the side with a low height of the partition, and the relatively clear mixture enters the second-stage separation tank from the side with a high height of the partition. Due to the pressure problem, the mixture with a large specific gravity flows fast, and therefore, a speed reduction device is additionally arranged to reduce the flow rate and facilitate precipitation. The flow direction of the mixture with a large specific gravity is in an "S" shape due to the different heights of the partitions. The flow direction of the mixture with a light specific gravity is partially in an "S" shape and partially in a straight line due to the different heights of the partitions. The clear water in the last-stage separation tank is recovered for cleaning the belt conveyor, achieving the recycling of water and the goals of eliminating the 3D post and reducing cost and increasing efficiency.

[0037] The specific implementation process is as follows:

[0038] The return belt of the belt conveyor is cleaned with water, and then the solid-liquid mixture after cleaning is recovered. Then, the solid-liquid mixture is precipitated and separated, the precipitate is recovered to the belt conveyor for production, and the clear water after precipitation is recovered for cleaning the return belt. The specific structure is shown in Figures 1-3 .

[0039] In this embodiment, a polyacrylamide anionic flocculant is used according to the water quality, and the flocculant is added at the dosing device. The height of the partition is reduced at a position of 1 / 2 width based on the original horizontal partition, and a longitudinal partition plate with the same height as the lowest height of the horizontal partition is additionally arranged between the two horizontal partitions, so that the number of separation tanks of the device is doubled and the water flow rate is reduced, the amount of precipitated particles is accelerated, and the precipitation time is prolonged. The longitudinal partition plate in each separation tank is designed to be inclined, and the hollow speed reduction device is installed from the low partition side of the second-stage separation tank to the low partition side of the last-stage separation tank, so as to sufficiently reduce the water flow rate and maximize the precipitation of particles and flocculation particles.

[0040] After the implementation of the project, the staff continuously observed the precipitation effect after the transformation and found that the effect was obvious. The device discharged more particles and the water content was reduced, which reduced the consumption of water by about 75% and reduced the dust concentration in the field environment from 8 mg / m 3 to 7 mg / m3 。

Claims

1. A layered and staged solid-liquid separation apparatus, characterized by: The device is a multistage separation tank, which is a rectangular box structure at the top and a conical structure at the bottom. A dosing device is arranged on the left side to separate solid and liquid according to the characteristics of the solid-liquid mixture by selecting different components of the flocculating agent. A sludge discharge port is arranged at the bottom of the right side to recycle the separated sediment to the belt conveyor. An inlet and an overflow port are arranged at the top of the front and rear sides, respectively. The inlet is mainly used to receive the solid-liquid mixture, and the separated clean water flows out of the overflow port to the lower part for recycling. The inside of the multistage separation tank is divided into several spaces by partitions. The partitions include horizontal partitions and vertical partitions, which are vertically arranged in the tank.

2. The layered and staged solid-liquid separation apparatus according to claim 1, wherein: The adjacent two separation tanks are separated by horizontal partitions, and n horizontal partitions divide the multistage separation tank into n+1 separation tanks. The heights of the horizontal partitions are different, and they are sequentially arranged as a first partition, a second partition,..., and an n-th partition from the inlet. The height of the first horizontal partition near the inlet is equal to that of the last horizontal partition near the overflow port, and the heights of the remaining horizontal partitions are slightly higher than those of the first and last horizontal partitions by 3 cm. The first partition is respectively arranged in front of and behind a first separation tank and a second separation tank. The first partition is longitudinally divided into left and right sides, and the height of the first partition near the inlet is lower than that of the first partition far from the inlet. A longitudinal partition and a buffer device are arranged in the middle of each separation tank after the second separation tank. A buffer device is arranged on the side of the first partition near the inlet in the second separation tank, and a longitudinal partition is arranged in the middle of the third separation tank. A buffer device is arranged on the left side of the longitudinal partition in the third separation tank, and the position of the buffer device changes alternately in the next separation tank.

3. The layered and staged solid-liquid separation apparatus of claim 2, wherein: The buffer device is a hollow speed reduction plate with holes uniformly arranged on a stainless steel plate to filter and slow down the water flow. The buffer device reduces the flow rate of the liquid between the adjacent two separation tanks, which is beneficial to the precipitation of the substances with a large specific gravity in the liquid.

4. The layered and staged solid-liquid separation apparatus of claim 1, wherein: The horizontal partitions are stainless steel plates, and the longitudinal partitions are polyethylene plates.

5. The layered and staged solid-liquid separation apparatus of claim 1, wherein: The height difference between the left and right sides of the first partition is 5 cm, i.e., the left side of the first partition is 5 cm higher than the right side of the first partition. Similarly, the height difference between the left and right sides of the second partition is also 5 cm, but the left side of the second partition is the water inlet side, and the left side of the second partition is 5 cm lower than the right side of the second partition. The same applies to the subsequent partitions.

6. The layered, staged solid-liquid separation device of claim 1, wherein: The longitudinal partition is arranged on the longitudinal center line of the separation tank, and the height of the longitudinal partition is 3 cm lower than the highest side of the adjacent horizontal partition. The lower part of the longitudinal partition in the second separation tank is inclined to the left by 20°, and the lower part of the longitudinal partition in the third separation tank is inclined to the right by 20°. The longitudinal partitions are alternately inclined to ensure that the lower part of the longitudinal partition in the last separation tank is inclined to the same side as the overflow port.

7. The layered, staged solid-liquid separation device of claim 1, wherein: The height of the overflow port of the last separation tank is equal to that of the inlet of the first separation tank and is installed on the side with a higher partition height.

8. The layered, staged solid-liquid separation device of claim 1, wherein: A sewage spiral mud pump is installed at the bottom of the multistage separation tank. An electric valve is arranged at the outlet of the spiral mud pump. The electric valve is opened to discharge the sludge to the belt conveyor for recycling and production when the spiral mud pump is running, and the electric valve is closed when the spiral mud pump is stopped.

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