Non-clogging oxidation-ditch-type wastewater treatment tank

Abstract

Disclosed in the present utility model is a non-clogging oxidation-ditch-type wastewater treatment tank, comprising a horizontal tank body. A main partition plate is provided in the horizontal tank body in the length direction of the horizontal tank body; gaps are formed between the main partition plate and two ends of the horizontal tank body; the main partition plate divides the horizontal tank body into two cavities, and the two cavities are communicated end to end to form an oxidation ditch circulation channel; and MBR curtain membranes are provided on at least one side of the main partition plate. According to the present utility model, MBR curtain membranes are used in combination with an oxidation ditch; since aeration structures are provided at the lower portions of the MBR curtain membranes, the curtain membranes are always shaking and are not prone to clogging; in addition, since the curtain membranes are loose compared with flat membranes, sludge is not prone to caking.

Description

An oxidation ditch-type sewage treatment pool that is not prone to clogging Technical Field

[0001] The utility model relates to the field of oxidation ditches, in particular to an oxidation ditch type sewage treatment pool which is not easily clogged. Background Art

[0002] An oxidation ditch is a variation of the activated sludge process. Its aeration tank is a closed channel, so its hydraulic flow pattern differs from that of the traditional activated sludge process. It is a circulating aeration ditch connected end-to-end. Due to its simplicity and ease of operation and management, oxidation ditches have seen a continuous increase in number and scale since the 1960s, with treatment capacity increasing from 300 population equivalents to the current 10 million population equivalents. Treatment targets have also expanded from domestic sewage to both municipal and industrial wastewater. However, oxidation ditches generally require additional sedimentation tanks to treat the effluent.

[0003] Patent number "CN110194524A" discloses "an MBR sewage treatment tank with oxidation ditch function". In this patent, an MBR flat membrane is installed in the oxidation ditch to replace the sedimentation tank. However, since there is no partition in the oxidation ditch, the MBR flat membrane is very easy to be clogged during use, and the sludge is very easy to be clogged between two adjacent flat plates and is easy to agglomerate. Utility Model Content

[0004] The utility model aims to provide an oxidation ditch type sewage treatment pool which is not easy to be clogged.

[0005] The innovation of this utility model lies in the combination of MBR curtain membrane and oxidation ditch. Since there is an aeration structure at the bottom of the MBR curtain membrane, the curtain membrane is always in vibration and is not easy to be blocked. In addition, since the curtain membrane is relatively loose compared with the flat membrane, the sludge is not easy to agglomerate.

[0006] In order to achieve the above-mentioned purpose of the utility model, the technical solution of the utility model is: an oxidation ditch type sewage treatment pool that is not easy to be clogged, including a horizontal tank body, a main partition is provided in the horizontal tank body along the length direction of the horizontal tank body, and there is a gap between the main partition and both ends of the horizontal tank body. The main partition divides the horizontal tank body into two cavities and the head and tail water of the two cavities are connected to form an oxidation ditch circulation channel; an MBR curtain membrane is provided on at least one side of the main partition.

[0007] Furthermore, a partition plate is provided on one side of the main partition plate, which is located on one side near one end of the main partition plate. The partition plate divides the main partition plate into two sections, a large section and a small section. The two sides of the partition plate are respectively the water inlet area and the sludge circulation area. The small section is the sludge circulation area, and the large section is the water inlet area. A water inlet is provided at the top of the water inlet area, and the water inlet is close to the partition plate; a sludge discharge pipe is provided at the bottom of the sludge circulation area.

[0008] Furthermore, the main partition is divided into main partition No. 1, a movable plate, and main partition No. 2 at a large section. The movable plate is located between main partition No. 1 and main partition No. 2. Slots for inserting main partition No. 1 and main partition No. 2 are provided on both sides of the movable plate, or slots for inserting the movable plate are provided on one side of main partition No. 1 and main partition No. 2.

[0009] Furthermore, an MBR curtain membrane maintenance port is provided on the top of the horizontal tank body, and a movable plate is located between the MBR curtain membrane maintenance ports.

[0010] Furthermore, MBR curtain membranes are provided on both sides of the main partition, and the MBR curtain membranes are evenly distributed on both sides of the main partition at the large section.

[0011] Furthermore, the distance between the two ends of the main partition and the end of the horizontal tank body is 1 / 20 to 1 / 10 of the length of the horizontal tank body.

[0012] Furthermore, an overflow port is provided on the upper portion of the side wall of the horizontal tank body.

[0013] Furthermore, an air stripping reflux device is provided between the sludge circulation area and the water inlet area to facilitate sludge reflux.

[0014] The beneficial effects of the utility model are:

[0015] In the utility model, the MBR curtain membrane and the oxidation ditch are used in combination. Since there is an aeration structure at the bottom of the MBR curtain membrane, the curtain membrane is always in vibration and is not easy to be blocked. In addition, since the curtain membrane is relatively loose compared with the flat membrane, the sludge is not easy to agglomerate.

[0016] The utility model provides a sludge circulation area inside the horizontal tank body to avoid excessively low discharge concentration of residual sludge and improve sludge discharge efficiency. At the same time, an air lift reflux device is provided in the sludge circulation area to provide power for the oxidation ditch flow and save energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic structural diagram of the present utility model.

[0018] FIG2 is a schematic diagram of the top structure of the present invention.

[0019] FIG3 is a pipeline arrangement diagram of the present utility model.

[0020] FIG4 is a schematic structural diagram of a main partition. Implementation Method

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings.

[0022] Example 1: A non-clogging oxidation ditch-type sewage treatment tank comprises a horizontal tank body 1, wherein a main partition 2 is provided inside the horizontal tank body 1 along the length of the horizontal tank body 1. There is a gap between the main partition 2 and both ends of the horizontal tank body 1, and the distance between the ends of the main partition 2 and the end of the horizontal tank body 1 is 1 / 20 to 1 / 10 of the length of the horizontal tank body. The main partition 2 divides the horizontal tank body 1 into two cavities, and the head and tail water of the two cavities are connected to form an oxidation ditch circulation channel; an MBR curtain membrane 3 is provided on at least one side of the main partition 2. The MBR curtain membrane 3 is provided on both sides of the main partition 2, and the MBR curtain membrane 3 is evenly distributed on both sides of the main partition 2 at the large section. An overflow port 10 is provided on the upper side wall of the horizontal tank body 1.

[0023] A partition plate 4 is also provided on one side of the main partition plate 2. This partition plate 4 is located near one end of the main partition plate 2 and divides the main partition plate into two sections: a large section and a small section. On either side of the partition plate 4 are a water inlet area 5 and a sludge circulation area 6. The small section is the sludge circulation area 6, and the large section is the water inlet area 5. A water inlet 7 is provided at the top of the water inlet area 5, close to the partition plate 4. An air lift reflux device 11 is provided between the sludge circulation area 6 and the water inlet area 5. A sludge discharge pipe 8 is provided at the bottom of the sludge circulation area 6. The main bulkhead 2 is divided into a No. 1 main bulkhead 2.1, a movable bulkhead 2.2, and a No. 2 main bulkhead 2.3. The movable bulkhead 2.2 is located between the No. 1 and No. 2 main bulkheads 2.1 and 2.3. Slots for inserting the No. 1 and No. 2 main bulkheads 2.1 and 2.3 are provided on either side of the movable bulkhead 2.2, or on one side of the No. 1 and No. 2 main bulkheads 2.3. An MBR curtain membrane access port 9 is provided at the top of the horizontal tank 1, with the movable bulkhead 2.2 located between these access ports.

[0024] The embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. An oxidation ditch type sewage treatment pool which is not easy to be clogged, comprising a horizontal tank body, characterized in that: A main partition is provided inside the horizontal tank body along the length direction of the horizontal tank body. There is a gap between the main partition and both ends of the horizontal tank body. The main partition divides the horizontal tank body into two cavities, and the head and tail water of the two cavities are connected to form an oxidation ditch circulation channel; an MBR curtain membrane is provided on at least one side of the main partition.

2. The oxidation ditch type sewage treatment pool which is not easy to be clogged according to claim 1 is characterized in that: A partition plate is also provided on one side of the main partition plate, and the partition plate is located on one side near one end of the main partition plate. The partition plate divides the main partition plate into two sections, a large section and a small section. The two sides of the partition plate are respectively a water inlet area and a sludge circulation area. The small section is the sludge circulation area, and the large section is the water inlet area. A water inlet is provided at the top of the water inlet area, and the water inlet is close to the partition plate; a sludge discharge pipe is provided at the bottom of the sludge circulation area.

3. The oxidation ditch type sewage treatment pool which is not easy to be clogged according to claim 2 is characterized in that: The main partition is divided into main partition No. 1, movable plate and main partition No. 2 at the large section. The movable plate is located between main partition No. 1 and main partition No.

2. Slots for inserting main partition No. 1 and main partition No. 2 are provided on both sides of the movable plate, or slots for inserting movable plates are provided on one side of main partition No. 1 and main partition No.

2.

4. The oxidation ditch type sewage treatment pool which is not easy to be clogged according to claim 3 is characterized in that: An MBR curtain membrane inspection port is provided on the top of the horizontal tank body, and a movable plate is located between the MBR curtain membrane inspection ports.

5. The oxidation ditch type sewage treatment pool which is not easy to be clogged according to claim 2 is characterized in that: MBR curtain membranes are provided on both sides of the main partition, and the MBR curtain membranes are evenly distributed on both sides of the main partition's large section.

6. The oxidation ditch type sewage treatment pool which is not easy to be clogged according to claim 1 is characterized in that: The distance between the two ends of the main partition and the end of the horizontal tank body is 1 / 20 to 1 / 10 of the length of the horizontal tank body.

7. The oxidation ditch type sewage treatment pool which is not easy to be clogged according to claim 2 is characterized in that: An overflow port is arranged on the upper part of the side wall of the horizontal tank body.

8. The oxidation ditch type sewage treatment pool which is not easy to be clogged according to claim 2, characterized in that: An air lift reflux device is provided from the sludge circulation area to the water inlet area.

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