CN212504218U

CN212504218U - Biochemical treatment device for sewage

Info

Publication number: CN212504218U
Application number: CN202021067569.7U
Authority: CN
Inventors: 曹韧; 康兴文; 刘大欢; 朱福美
Original assignee: Ningbo Bochuan Waste Liquor Treatment Co ltd
Current assignee: Ningbo Bochuan Waste Liquor Treatment Co ltd
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2021-02-09
Anticipated expiration: 2030-06-11

Abstract

Biochemical processing apparatus of sewage, including the reaction tank, be provided with the cavity in the reaction tank, first air inlet, delivery port and water inlet are being connected to the cavity, the reaction tank intermediate position set up the cylinder, the inside aeration system that is provided with of cylinder, the air duct top is connected with the second air inlet, the air duct below is provided with the gas outlet, thereby the mixed liquid of waste water that sewage biological treatment device and method made the backward flow contacts with aeration gas and has strengthened denitrogenation and eliminated COD's effect, has improved sewage treatment efficiency, and it is good to go out water quality of water, volume load height, sparingly take up an area of, mud output is low, little to all ring edge borders on.

Description

Biochemical treatment device for sewage

Technical Field

The utility model relates to a sewage treatment field, concretely relates to biological sewage treatment device.

Background

Generally, in a biological wastewater treatment plant, the mixed liquor is aerated in an aeration tank and then allowed to stand in a settling tank to separate a supernatant and a wastewater mixed liquor, at least a portion of which is returned to the aeration tank to be mixed with the wastewater feed. The traditional sewage biochemical treatment scheme has the defect of slow treatment speed. The treatment efficiency is low, the aeration gas is injected into a device needing biochemical treatment through a single aeration system, and the COD value can be reduced after a long time, so that a large amount of manpower and material resources are consumed, the current technical problem cannot be well solved, a new biochemical treatment device is urgently needed at present, and the working efficiency and the working quality of the whole device are improved by changing the use mode of the aeration gas and the internal structure of the sewage biochemical treatment device. Therefore, there is still a need to develop a new sewage biological treatment apparatus and method having low energy consumption, high reliability and high efficiency.

Disclosure of Invention

An object of the present invention is to provide a biological sewage treatment device or method for solving the above problems in the prior art, and therefore the present invention provides the following technical solutions:

sewage biological treatment device, including the reaction tank, be provided with the cavity in the reaction tank, first air inlet, delivery port and water inlet are being connected to the cavity, the reaction tank intermediate position set up the cylinder, the inside aeration system that is provided with of cylinder, the air duct top is connected with the second air inlet, the air duct below is provided with the gas outlet, the gas outlet with the cavity is connected, is located its below, the second air inlet is connected with the vent pipe, first air inlet is connected with the admission line, the water inlet with the reaction tank is connected and is located the top of first air inlet, gas outlet department is provided with the valve that the control gas got into, the cavity is provided with COD automatic checkout device in the top of water inlet, the top of cavity is located near delivery port and is provided with gas-liquid separation device. The gas is an aeration gas.

The aeration gas is provided by an aeration system, an aeration pipeline is arranged in the column body, and the aeration gas enters the second gas inlet through the gas inlet pipeline and then enters the aeration pipeline. The first air inlet and the air outlet are opposite to each other at the bottom of the cavity, the horizontal heights of the first air inlet and the air outlet are consistent, and the opposite air flow is consistent. The first air inlet is provided with a valve for controlling the flow of aeration gas, and the second air inlet is provided with a valve for controlling the flow of aeration gas. And a gas-liquid separation device for separating the gas and the wastewater is arranged at the water outlet.

And the middle part of the cavity is provided with an automatic detection device for detecting the oxygen concentration in the cavity. The automatic COD detection device controls the gas to enter and close at the valve according to the content of oxygen in the cavity. The cavity further comprises a settling section for providing the wastewater mixed liquor. The ventilation system is internally provided with four air ducts.

According to the utility model discloses a some embodiments of biological sewage treatment plant, the mixed liquid return equipment of waste water utilizes the mixed liquid of gas drive waste water to flow, wherein gas can be directly and the mixed liquid contact of waste water, gas with the mixed liquid of waste water mixes, like this the mixed liquid come-up of waste water is smugglied secretly to gas to the concentrated mixed liquid of drive flows.

In some embodiments, the waste water mixed liquid backflow device comprises a conduit allowing the gas to enter, the conduit is provided with a gas inlet and a gas outlet, the gas guide pipe is installed inside the column body, the gas is mixed with the waste water mixed liquid entering from the water inlet inside the reaction tank after the gas enters, under the pressure and floating action of the gas, the gas and the waste water mixed liquid form a gas-liquid mixture in the reaction tank and flow in a parallel flow mode, and then the gas-liquid mixture is discharged from the water outlet after a period of reaction inside the reaction tank, so that the waste water mixed liquid is driven to flow.

According to some embodiments of the present invention, the settling section may be any device that enables the separation of the mixed liquid from the aeration treatment to form a mixture of supernatant and wastewater. Generally, the settling section may be a settling tank or a sedimentation basin, and in some cases, an overflow tank is provided at an upper portion of the settling section to discharge a supernatant as an effluent.

In some embodiments, a flow control valve is provided on the gas conduit to control the flow of gas into the conduit, thereby controlling the flow of the wastewater mixed liquor.

According to some embodiments of the biological sewage treatment plant of the present invention, the anoxic treatment section, the sedimentation section and the aeration section may be provided in a single cylinder. The cylinder can be a circular cylinder or a polygonal cylinder.

Preferably, according to some embodiments of the sewage biological treatment apparatus of the present invention, the gas providing device, such as a fan for providing aeration gas, and the like, and the sewage feeding device are provided, which have at least the advantages of noise reduction and convenient arrangement and installation, so as to facilitate the deployment in a small area such as a residential area where people are in a large area and the space is narrow.

Preferably, according to the present invention, the sewage biological treatment device can be disposed in various environments for sewage biochemical treatment, such as on the ground or in a semi-basement. The application method is convenient and simple, and is suitable for the biochemical treatment of sewage in large and small factories.

Preferably, the biological sewage treatment device and method of the present invention make full use of the aeration gas in the biological sewage treatment, and the sludge reflux pump can be omitted, so that the energy consumption and the equipment investment are reduced, the arrangement of the device and the process is more flexible, and the reliability is improved because the moving parts and the pipeline connection of the device are reduced.

After adopting the structure, the utility model discloses a thereby sewage biological treatment device and method make the waste water mixed liquid of backward flow and aeration gas contact and strengthened denitrogenation and eliminate the effect of COD, improved sewage treatment efficiency, go out that water quality of water is good, volume load is high, save take up an area of, mud output is low, little to the surrounding environment influence.

Drawings

Fig. 1 is a sectional view of the entire device.

Fig. 2 is a schematic structural diagram of the appearance of the whole device.

Detailed Description

A sewage biological treatment device comprises a reaction tank 1, a cavity 4 is arranged in the reaction tank 1, the cavity 4 is connected with a first air inlet 2, a water outlet 5 and a water inlet 3, a column body 6 is arranged in the middle of the reaction tank 1, a ventilation system is arranged in the column body 6, the upper part of the air duct 7 is connected with a second air inlet 8, an air outlet 13 is arranged below the air duct 7, the air outlet 13 is connected with the cavity 4 and is positioned below the cavity, the second air inlet 8 is connected with a ventilation pipe 9, the first air inlet 2 is connected with an air inlet pipe 15, the water inlet 3 is connected with the reaction tank 1 and is positioned above the first air inlet 2, the air outlet 13 is provided with a valve 14 for controlling air to enter, the cavity 4 is provided with a COD automatic detection device 12 above the water inlet 3, and a gas-liquid separation device is arranged above the cavity 4 and near the water outlet 5.

In the whole device, the air inlet device is respectively provided with two parts, one part aerates air to the bottom of the cavity 4 through the air duct 7 in the column body, and a plurality of air ducts 7 are arranged in the column body, the air inlet of the air duct 7 is tightly communicated with an air duct 9, a valve 14 for controlling the gas flow is arranged at an air outlet 13 below the air duct 7, the valve 14 is controlled by a COD standard automatic detection device 12, an air inlet 2 for aeration gas to enter is arranged below the reaction tank, the principle of the air inlet 2 is the same as that of the column body air outlet 13 in the middle of the reaction tank, the air inlet 2 and the air outlet 13 quickly and uniformly pump the aeration gas into the cavity through gas convection, the aeration gas can be better used by adopting the method, and the sewage to be treated entering through the water inlet 3 can be treated more quickly, the horizontal heights of the positions of the gas outlets for convection in the other two directions are consistent, and the gas flow is the same.

After the sewage in the cavity 4 in the reaction tank 1 is subjected to aeration treatment for a period of time, the oxygen concentration of the cavity 4 is changed, and the change can be detected, so that the automatic detection device 12 of the cavity 4 is used for detecting the COD value of the cavity, when the COD value of the cavity does not reach the standard, the automatic detection device 12 controls the valves of the first air inlet 2 and the air outlet 13, if the COD value is too high, the valve 14 is opened to continue to enter the aeration gas, if the COD value in the cavity is reduced to the normal level, the valve 14 is automatically closed, and all the aeration gas stops entering the cavity 4.

The mixed liquid after the aeration treatment is uniformly distributed in the precipitation section through the gas-liquid separation device 11 and is separated into supernatant at the upper part of the precipitation section and concentrated mixed liquid at the lower part of the precipitation section. The supernatant is discharged as effluent through a water outlet 5.

The present invention is by no means limited to these specific embodiments. The skilled person can make various modifications or changes to the invention, and such modifications and changes are within the scope of the invention.

Claims

1. A sewage biochemical treatment device comprises a reaction tank (1), wherein a cavity (4) is arranged in the reaction tank (1), the cavity (4) is connected with a first air inlet (2), a water outlet (5) and a water inlet (3), a cylinder (6) is arranged at the middle position of the reaction tank (1), an aeration system is arranged inside the cylinder (6), the upper part of an air duct (7) is connected with a second air inlet (8), an air outlet (13) is arranged below the air duct (7), the air outlet (13) is connected with the cavity (4) and is positioned below the cavity, the second air inlet (8) is connected with an aeration pipeline (9), the first air inlet (2) is connected with an air inlet pipeline (15), the water inlet (3) is connected with the reaction tank (1) and is positioned above the first air inlet (2), a valve (14) for controlling the gas to enter is arranged at the air outlet (13), the automatic COD detection device (12) is arranged above the water inlet (3) of the cavity (4), and the gas-liquid separation device (11) is arranged above the cavity (4) and near the water outlet (5).

2. The biochemical sewage treatment apparatus of claim 1, wherein the gas is an aeration gas.

3. Biochemical treatment installation according to claim 2, characterized in that said aeration gas is provided by an aeration system, an aeration duct (9) being provided inside said column (6), said aeration gas entering the second inlet (8) through an inlet duct (15) and then entering the aeration duct (9).

4. Biochemical treatment installation of sewage according to claim 1, characterized in that said first inlet (2) and said outlet (13) maintain a gas convection at the bottom of the cavity (4), both at a level consistent with the convective gas flow rate.

5. Biochemical treatment installation of sewage according to claim 1, characterized in that at said first inlet (2) a valve (14) is provided for controlling the flow of aeration gas and at said second inlet (8) a valve (14) is provided for controlling the flow of aeration gas.

6. Biochemical treatment installation of sewage water according to claim 1, characterized in that a protective layer is applied inside the gas-liquid separation device (11).

7. Biochemical treatment installation of sewage according to claim 1, characterized in that the intermediate portion of said cavity (4) is provided with automatic detection means (12) for detecting the oxygen concentration in the cavity.

8. Biochemical treatment installation according to claim 7, characterized in that the outer surface of said automatic detection means (12) is covered with a protective film.

9. Biochemical treatment installation of sewage according to claim 1, characterized in that said cavity (4) further comprises a settling section for providing a waste water mixture.

10. Biochemical treatment installation for sewage water according to claim 1, characterised in that said aeration system comprises a plurality of air ducts (7).