CN203291633U - Solid-liquid separating device for waste water suspended solids - Google Patents

Abstract

The utility model discloses a solid-liquid separation device for suspended solids in wastewater, comprising a pool body, the pool body is divided into a water inlet pool and a solid-liquid separation tank by a vertical wall, a water inlet is arranged above the water inlet pool, and the bottom of the water inlet pool communicates with the solid-liquid separation tank In the solid-liquid separation tank, from top to bottom, there are clear water layer, filter layer for blocking suspended solids, diffusion layer and sludge layer. The separator is provided with a suspended solids meter in the filter resistance layer, and a sludge collection pipe is provided in the sludge layer, and the sludge collection pipe is connected with a sludge pump. The device has the advantages of simple structure, convenient management, large amount of treated water, good solid-liquid separation effect, and high removal rate of suspended solids in wastewater.

Description

A solid-liquid separation device for suspended solids in wastewater

technical field

The utility model belongs to the field of sewage treatment and is suitable for a solid-liquid separation device for breeding wastewater such as greenhouse soft-shelled turtles and pig farms and other wastewater with relatively high suspended matter. the

Background technique

With the vigorous development of large-scale and intensive aquaculture in my country, aquaculture wastewater such as greenhouse soft-shelled turtles and pig farms has become an important source of water pollution. In a high-density farming environment, the remaining feed, excrement of farming organisms and dead organisms will be continuously deposited in the bottom mud during the breeding process. In order to ensure the soft-shelled turtle breeding environment in the greenhouse and the healthy growth of the soft-shelled turtle body, the method of frequent water changes is currently used to improve the soft-shelled turtle breeding environment. A large amount of sediment enters the water body with the drainage, resulting in a high content of suspended solids in the discharged wastewater. Studies have shown that the removal of suspended solids can effectively reduce the concentration of N, P and COD in water, and it plays an extremely important role in improving the water quality of aquaculture wastewater. Certain methods must be adopted for solid-liquid separation treatment of wastewater. the

At present, for the solid-liquid separation process of such sewage suspended matter, more natural precipitation methods are used. The existing sedimentation tanks mainly include flat flow sedimentation tanks, vertical flow sedimentation tanks, radial flow sedimentation tanks and inclined plate sedimentation tanks. Among them, vertical flow sedimentation tanks are widely used because of their small footprint and better treatment effects. However, the vertical flow sedimentation tank is only suitable for treating wastewater with a small volume of water, and has poor adaptability and buffering capacity to water volume changes. During the sedimentation process, most of the fine suspended solids will float up with the air bubbles and cannot be removed. BOD, ammonia nitrogen, suspended solids ( SS) etc. are still higher. the

Filtration is also a common method for solid-liquid separation. Existing filtration methods mainly include grid sieve filtration, microporous filtration, membrane filtration and depth filtration. The existing fillers mainly include quartz sand, anthracite particles, magnetite particles and dolomite particles. Generally, the filter tank needs to be composed of a filter layer, a bedding layer, a water distribution system and a drainage tank. The whole process consists of two stages: filtration and backwashing. separate. There are many factors affecting the whole process, such as filter material properties (size, shape, porosity, thickness and surface properties), suspended matter properties (size, shape, concentration, surface properties), air resistance caused by air bubbles generated in the anaerobic process, and backwashing process control. In short, the filtration treatment method is more complicated, and the process is difficult to control, and the filter material needs to be replaced from time to time, so it cannot be applied to the treatment of greenhouse turtle breeding wastewater with large water volume and uncertain water quality. the

EVA material (ethylene-vinyl acetate copolymer) was introduced into my country in 1970. It is a new type of environmentally friendly plastic foam material. Because it is non-toxic, harmless, soft, waterproof and elastic, it is the safest, most convenient and high-quality light industry in modern times. raw materials. EVA has the advantages of good cushioning, shock resistance, heat insulation, moisture resistance, and chemical corrosion resistance, and it will not cause a large degree of deformation under high temperature, blisters, and kneading. In addition, the density of EVA material is between 0.91 and 0.93, which can be suspended in water. It does not contain heavy metals and is biodegradable, and will not cause secondary pollution to the environment, and has a wide range of applications. the

Contents of the invention

In order to overcome the shortcomings of the above-mentioned solid-liquid separation method (precipitation and filtration), the utility model provides a simple structure, small footprint, convenient management, high treatment effect, and can handle breeding wastewater such as greenhouse soft-shelled turtles, pig farms, etc. High-efficiency solid-liquid separation device for wastewater with high suspended solids. the

The purpose of this utility model is achieved through the following technical solutions: the solid-liquid separation device for suspended solids in wastewater includes a pool body, the pool body is divided into a water inlet pool and a solid-liquid separation tank by a vertical wall, and a water inlet is arranged above the water inlet pool. The bottom of the pool is connected to the solid-liquid separation tank. The solid-liquid separation tank is divided into a clear water layer, a filter layer for blocking suspended solids, a diffusion layer and a sludge layer from top to bottom. A partition with mesh is arranged between the layers, a suspended solids measuring meter is arranged in the filter resistance layer, and a sludge collecting pipe is arranged in the sludge layer, and the sludge collecting pipe is connected with the sludge pump. the

The above-mentioned filter resistance layer is a suspension layer that is processed into a "cross" shape by hydrophobic and inert EVA material, and is tightly combined between individuals in water. the

The solid-liquid separation device for treating suspended matter in wastewater of the utility model is suitable for the solid-liquid separation process of breeding wastewater such as greenhouse soft-shelled turtles and pig farms and other wastewater with relatively high suspended matter. the

The device enters the water tank to receive raw water, and the waste water slowly enters the solid-liquid separation tank. the

The use process is divided into two processes: influent filtration and water stop collecting sludge. When the water enters, the wastewater enters from the inlet pool, and when it flows through the diffusion layer, the larger particle pollutants in the wastewater, such as the remaining feed, excrement of breeding organisms and dead organisms, sink to the sludge layer through sedimentation. Smaller particles have poor sedimentation effect and will float up to the filter layer with the water flow or air bubbles. In the filter layer, through the impact with the "cross" shaped EVA material, most of the air bubbles attached to the particles will burst, and the smaller particles will be filtered by the filter layer. Blocking, because the water flow in the filter layer is almost static, the particles larger than the water density sink to the sludge layer under the action of gravity, while the clean water enters the clear water layer through the filter layer and the mesh partition and overflows through the upper outlet . During the water intake process, due to the water pressure and the extrusion of the partition, the "ten" shaped EVA material will continue to rise with the increase of the water intake, and finally the individuals will be closely combined to form a filter layer with extremely small porosity. When the suspended solids (SS) meter monitors that the wastewater SS≧50 in the upper part of the filter resistance layer, the sensor controls the water inflow to stop. After the water inflow stops, the "ten" shaped EVA material and sludge will settle rapidly due to the lower water pressure of the lower layer, and the sludge will be collected by the lower layer collecting pipe, pumped out and discharged by the mud pump. Finally, the solid-liquid separation is completely realized. the

The utility model has the following advantages:

(1) The hydrophobic and inert EVA material used is a new type of environmentally friendly plastic foam material, which is processed into a "ten" shape, which is not easy to deform and can be suspended in water.

(2) Due to its special "cross" shape, the EVA material can be closely combined with each other under the pressure of water inlet and the extrusion of the partition, with a small porosity and a strong filtering effect. the

(3) A water inlet pool is added before the solid-liquid separation tank, which can buffer the impact of water inlet on the solid-liquid separation process and reduce power consumption. the

(4) The suspended solids meter is used to monitor the concentration of suspended solids in the upper part of the filter layer, and the sensor is used to control the water inlet switch through the change of suspended solids concentration, which is convenient for management. the

(5) The treatment process is simple, the performance is stable, and the effluent water quality is good. The structure is simple, and when the water level drops when the sludge is sucked, it has a good flushing effect on the filter layer material, and its filtering function can be completely restored, without problems such as clogging. the

Description of drawings

Fig. 1 is the structural representation of the utility model. the

In the figure: 1 water inlet, 2 water inlet tank, 3 tank body, 4 sedimentation layer, 5 diffusion layer, 6 filter resistance layer, 7 clear water layer, 8 water outlet, 9 sludge collection pipe, 10 mud pump, 11 partition , 12 suspended solids meter. the

Detailed ways

With reference to Fig. 1, the solid-liquid separation device of the wastewater suspended matter of the present utility model comprises a pool body 3, and in the pool body 3, is separated into a water inlet pool 2 and a solid-liquid separation tank by a vertical wall, and a water inlet 1 is arranged above the water inlet pool 2, and The bottom of the pool 2 is connected to the solid-liquid separation tank, and the solid-liquid separation tank is divided into a clear water layer 7, a filter layer 6 for blocking suspended solids, a diffusion layer 5 and a sludge layer 4 from top to bottom, a clear water layer 7 and a water outlet 8 Connected, between the clear water layer 7 and the filter resistance layer 6, a partition plate 11 with a mesh is arranged, a suspended solids meter 12 is arranged in the filter resistance layer 6, and a sludge collection pipe 9 is provided on the sludge layer 4, and the sludge is collected The pipe 9 is connected to the dredge pump 10 . the

The filter resistance layer 6 is a suspended layer that is processed into a "cross" shape by hydrophobic and inert EVA material, and is tightly combined between individuals in water. It has a strong filtering effect on suspended solids. the

The use process is divided into two processes: influent filtration and water stop collecting sludge. When the water enters, the waste water enters from the water inlet pool 2, and when it flows through the diffusion layer 5, the larger particle pollutants in the waste water such as the remaining feed, excrement of breeding organisms and dead organisms sink to the sludge layer 4 through sedimentation . Smaller particles have poor sedimentation effect and will float up to the filter layer 6 with the water flow or air bubbles. In the filter layer 6, through the impact with the EVA material, most of the air bubbles attached to the particles are broken, and the smaller particles are blocked by the filter layer. The water flow in the filter resistance layer 6 is almost static, and the particles with a density greater than water sink to the sludge layer 4 under the action of gravity, while the clean water enters the clean water layer 7 through the filter resistance layer 6 and the mesh partition 11 and passes through the upper outlet. Spout overflows. During the water inflow process, due to the pressure of the water inflow and the extrusion of the partition, the EVA material will continue to rise with the increase of the inflow of water, and finally the individual will be closely combined to form a filter layer with extremely small porosity. When the suspended solids meter 12 monitors that the wastewater SS≧50 in the upper part of the filter resistance layer, the water inflow is controlled by the sensor to stop. After the water inflow stops, the EVA material and sludge will settle rapidly due to the lower water pressure in the lower layer, and the sludge will be collected by the lower collecting pipe 9, pumped out by the mud pump 10 and discharged. Finally, the solid-liquid separation is completely realized. the

Claims (2)

1. the equipment for separating liquid from solid of a waste water suspension, it is characterized in that comprising pond body (3), in pond body (3), by perpendicular wall, be separated into intake pool (2) and solid-liquid separation tank, intake pool (2) top arranges water inlet (1), intake pool (2) below communicates with solid-liquid separation tank, in solid-liquid separation tank, be respectively clear water layer (7) from top to bottom, the filtration resistance layer (6) that stops suspension, diffusion layer (5) and sludge blanket (4), clear water layer (7) is communicated with delivery port (8), between clear water layer (7) and filtration resistance layer (6), the meshed dividing plate of tool (11) is set, in filtration resistance layer (6), be provided with suspension meter (12), sludge blanket (4) is provided with mud collecting pipe (9), mud collecting pipe (9) is connected with slush pump (10).

2. the equipment for separating liquid from solid of waste water suspension according to claim 1, is characterized in that filtration resistance layer (6) is the superposed layer that is processed into " ten " word shape, is combined closely between individuality in water by hydrophobic inertia EVA.

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