CN202625981U - Vertical sedimentation basin - Google Patents

Abstract

The utility model relates to a vertical flow sedimentation tank, which relates to a sewage treatment device. The purpose of the method is to solve the technical problems of unreasonable structure setting of the existing device and lack of sewage treatment effect. Including anoxic tank, aeration tank, sedimentation tank and clear liquid collection tank, the upper end of the aeration tank is connected to the sedimentation tank through the middle water inlet pipe, and the outlet of the middle water inlet pipe is connected with a perforated water distribution pipe, and the sewage is evenly distributed through the perforated water distribution pipe Distributed in the sedimentation tank, the supernatant in the sedimentation tank enters the supernatant liquid collection tank through the overflow tank, part of the sludge in the mud hopper at the lower end of the sedimentation tank is pumped into the aeration tank through the perforated sludge discharge pipe, and the rest is pumped into the aeration tank. Row. Through the arrangement of perforated water distribution pipes and perforated sludge discharge pipes in the sedimentation tank, the sewage can not only distribute water evenly in the sedimentation tank, but also quickly and completely treat the settled sludge. This structure setting makes the shape design of the sedimentation tank no longer subject to Restrictions can be handled flexibly according to the actual situation, and the application is more extensive.

Description

a vertical flow sedimentation tank

technical field

The utility model relates to a sewage treatment device, in particular to a vertical flow sedimentation tank for sewage treatment.

Background technique

At present, the ordinary vertical flow sedimentation tank generally refers to the sedimentation tank in which the wastewater in the pool flows vertically. The plane figure of the pool body is circular or square, and the water enters the pool from top to bottom through the water inlet pipe located in the center of the pool (the flow rate in the pipe should be less than 30mm/s), and an umbrella-shaped baffle is set under the pipe to evenly distribute the wastewater in the pool After slowly rising along the entire cross-section (for domestic sewage, it is generally 0.5-0.7mm/s, and the settling time is 1-1.5h), the suspended matter settles into the conical sedimentation bucket at the bottom of the pool, and the clarified water flows from around the pool to the surrounding area. The overflow weir flows out. A baffle and a scum tank are installed in front of the weir to retain scum to ensure the quality of the effluent. On one side of the pool, a mud discharge pipe (diameter greater than 200mm) is set against the wall of the pool to discharge the mud regularly by hydrostatic pressure.

Disadvantages of ordinary vertical flow sedimentation tanks:

①The treatment effect is prone to large fluctuations due to the influence of influent water quality;

②The water inlet pipe is only suitable for square or round pools, and it is easy to cause uneven water intake for rectangular pools.

Utility model content

The purpose of this utility model is to solve the technical problem that the structure setting of the existing ordinary vertical flow sedimentation tank is unreasonable and the effect is insufficient when the water volume is large, and to provide a vertical flow sedimentation tank. The arrangement of the pipes enables the sewage to distribute water evenly in the sedimentation tank, and can quickly and completely remove the settled sludge. This structure setting makes the shape design of the sedimentation tank no longer restricted, and can be flexibly treated according to the actual situation. It is suitable for more extensive. the

In order to achieve the above purpose, the technical solution adopted by the utility model is: a vertical flow sedimentation tank, including anoxic tank, aeration tank, sedimentation tank and clear liquid collection tank, wherein the anoxic tank is used to make the sewage anoxic The denitrification is then discharged into the aeration tank. The aeration tank is used to degrade the organic nutrients in the sewage. The upper end of the aeration tank is connected to the sedimentation tank through the middle water inlet pipe, and the sewage is discharged into the sedimentation tank through the middle water inlet pipe. An overflow tank is provided at the end, and the supernatant in the sedimentation tank enters the clear liquid collection tank through the overflow tank, and a mud bucket for collecting sludge is provided at the lower end of the sedimentation tank.

In the above technical solution, the water outlet of the middle water inlet pipe is connected with a perforated water distribution pipe, and the perforated water distribution pipe is arranged horizontally. The sewage discharged from the middle water inlet pipe is evenly distributed on the bottom of the sedimentation tank through the perforated water distribution pipe. There is a perforated sludge discharge pipe arranged parallel to it below, and the middle part of the perforated sludge discharge pipe is connected to the sludge return pump in the aeration tank through a pipeline, and part of the sludge in the mud hopper is pumped into the aeration tank through the perforated sludge discharge pipe middle.

In the above technical solution, the central point of the perforated water distribution pipe is connected to the middle water inlet pipe, and perforations are respectively opened from the central point to both ends. The center point of the pipe is connected to the sludge return pump in the aeration tank through the pipe, and there are perforations respectively from the center point to both ends. The opening of the perforation on the tube is set downwards. the

As can be seen from the technical characteristics of the above-mentioned utility model, its advantages are: through the perforation test of the perforated water distribution pipe, the perforation position of the perforated water distribution pipe is determined, and the problem of uniform water distribution in various shapes of pools can be solved; The perforation test of the mud discharge pipe has determined the perforation position of the perforated mud discharge pipe, which can remove the sludge accumulated at the bottom of the sedimentation tank in time. There is no dead zone, and it can solve the problem of floating mud in the sedimentation tank very well. Through the arrangement of perforated water distribution pipes and perforated sludge discharge pipes in the sedimentation tank, the sewage can not only distribute water evenly in the sedimentation tank, but also quickly and completely treat the settled sludge. This structure setting makes the shape design of the sedimentation tank no longer subject to Restrictions can be handled flexibly according to the actual situation, and the application is more extensive. the

Description of drawings

The utility model will be illustrated by comparing the accompanying drawings and in conjunction with examples:

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

Fig. 2 is a top view structural schematic diagram of Fig. 1;

Fig. 3 is a structural schematic diagram of the perforated water distribution pipe and the perforated mud discharge pipe of the utility model;

Wherein reference numeral 1 is anoxic tank 2 is an aeration tank 3 is a sedimentation tank

4 is the clear liquid collection pool 5 is the middle water inlet pipe 6 is the overflow tank

7 is the mud bucket 8 is the perforated cloth water pipe 9 is the perforated mud discharge pipe

10 is the pipeline 11 is the sludge return pump 12 is the perforation.

Detailed ways

    Below in conjunction with accompanying drawing, the utility model is described further by embodiment.

Preferred embodiment

A vertical flow sedimentation tank as shown in Figure 1 and Figure 2, its working process is: the raw water of domestic sewage first enters the anoxic tank, participates in denitrification in the anoxic tank, then enters the aeration tank, and then enters the aeration tank Under the action of microorganisms in the wastewater, the organic matter and nutrients in the wastewater are degraded, and the muddy water mixture flows into the middle water inlet pipe through the overflow pipe, and then enters the perforated water pipe. In the process, the mud-water separation is realized in the mud-water separation area, and the supernatant enters the overflow tank and flows into the clear liquid collection tank. Part of the settled sludge is pumped by the perforated sludge discharge pipe to the aeration tank by the sludge return pump as return sludge, and part is discharged as excess sludge. The settled activated sludge is collected in the mud hopper of the sedimentation tank, and is evenly discharged from the perforated sludge discharge pipe through the sewage pump.

In this utility model, as shown in Figure 3, the perforated water pipe material is generally made of polyvinyl chloride material, and the perforations on it can be arranged at a cross 45°, and the spacing and size of the holes are set according to the actual operating conditions, so that the waste water can be Uniform distribution; the perforated sludge discharge pipe is used to discharge the sludge, and its appearance is consistent with the shape of the perforated water distribution pipe. The perforated sludge discharge pipe has a perforated opening downward, and the sludge is pumped out by the sludge return pump, which can achieve the purpose of uniform sludge discharge .

All features disclosed in this specification, except mutually exclusive features, can be combined in any way.

Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features. the

Claims (3)

1. vertical sedimentation basin; It is characterized in that comprising anoxic pond (1), aeration tank (2), settling tank (3) and clear liquid collecting tank (4); Wherein anoxic pond (1) is used to make sewage to carry out the anoxic denitrification effect to enter aeration tank (2) then; Aeration tank (2) is used for the organism nutritive substance of degradation of sewage; Upper end, aeration tank (2) is connected to settling tank (3) through middle water inlet pipe (5), and sewage is drained in the settling tank (3) through middle water inlet pipe (5), and settling tank (3) upper end is provided with overflow groove (6); Supernatant in the settling tank (3) enters into clear liquid collecting tank (4) through overflow groove (6), and settling tank (3) lower end is provided with the bucket (7) that is used for collection and treatment mud.

2. a kind of vertical sedimentation basin according to claim 1; The water outlet place that it is characterized in that said middle water inlet pipe (5) is connected with perforation water distributor (8); Perforation water distributor (8) is horizontally disposed with; The sewage of discharging from middle water inlet pipe (5) is distributed in settling tank (3) bottom uniformly through perforation water distributor (8); The below of perforation water distributor (8) is provided with the perforated sludge discharge pipe (9) of arrangement in parallel, and perforated sludge discharge pipe (9) middle part is connected with sludge reflux pump (11) in aeration tank (2) through pipeline (10), and the mud in the bucket (7) is a part of to be pumped in the aeration tank (2) through perforated sludge discharge pipe (9).

3. a kind of vertical sedimentation basin according to claim 2; The central point that it is characterized in that said perforation water distributor (8) is connected with middle water inlet pipe (5), offers perforation (12) respectively, the perforation (12) that decentering point is far away more from central point toward two ends; Distance between the perforation (12) is short more; The central point of perforated sludge discharge pipe (9) is connected with sludge reflux pump (11) in aeration tank (2) through pipeline (10), also offers perforation (12) respectively, the perforation (12) that decentering point is far away more from the past two ends of central point; The distance of perforation between (12) is short more, and the perforation (12) on the perforated sludge discharge pipe (9) Open Side Down is provided with.

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