Organic wastewater integrated open type zero discharge equipment

Abstract

The utility model discloses organic wastewater integrated open type zero discharge equipment which comprises a water collecting tank and a rectangular treatment box, an inner cavity of the treatment box is transversely and sequentially divided into an anaerobic tank, an anoxic tank, an aeration tank, a sedimentation tank and a clean water tank by partition plates, and sewage in the water collecting tank is pumped into the anaerobic tank through a sewage lifting pump; an aeration pipe group is arranged in the aeration tank, compressed air is introduced into the aeration pipe group and is diffused and discharged into sewage, a water collecting tank covering an upper end opening is mounted at the upper part of the treatment box, an open type evaporation screen is mounted at the upper part of the water collecting tank, and a spraying pipe which transversely penetrates through the open type evaporation screen is fixedly mounted at the top of the open type evaporation screen; a plurality of uniformly distributed nozzles are mounted on the lower side of the spraying pipe in the length direction, and the spraying pipe pumps water from the clean water tank through a water pump a. The device integrates a biochemical system and an evaporation system, can be directly produced in a factory, and is convenient to transport, low in operation cost and rapid in on-site overall installation.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an integrated open zero-emission device for organic wastewater. Background Technique

[0002] Organic wastewater is the focus in the current sewage treatment field. At present, organic wastewater can be treated by methods such as biological treatment, physicochemical treatment, advanced oxidation, electrochemistry, and photocatalytic oxidation. Among them, the biological treatment method has the advantages of wide application range, high treatment efficiency, and low environmental impact, so it is widely used. The biological treatment method is a method of using microorganisms to degrade organic matter. Among them, the A2 / O process is widely used in the treatment of organic wastewater. Its core lies in realizing the effective removal of nitrogen and phosphorus in sewage through the biological reaction processes of anaerobic, anoxic, and aerobic stages, but it cannot meet the zero-emission requirements. Content of the Utility Model

[0003] The purpose of the utility model is to provide an integrated open zero-emission device for organic wastewater to solve the problems put forward in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: An integrated open zero-emission device for organic wastewater, including a collection tank and a rectangular treatment tank. The inner cavity of the treatment tank is horizontally separated by partitions in sequence to form an anaerobic tank, an anoxic tank, an aeration tank, a sedimentation tank, and a clear water tank. The sewage in the collection tank is pumped to the anaerobic tank through a sewage lift pump. An air distribution pipe group is arranged inside the aeration tank, and the air distribution pipe group accesses compressed air and diffuses it into the sewage. A water collection trough covering the upper port is installed on the upper part of the treatment tank, an open evaporation screen is installed on the upper part of the water collection trough, a horizontally penetrating spray pipe is fixedly installed at the top of the open evaporation screen, and a number of uniformly arranged nozzles are installed on the lower side of the spray pipe along the length direction. The spray pipe pumps water from the clear water tank through a water pump a.

[0005] Preferably, the anaerobic tank replenishes anaerobic sludge from the sedimentation tank through a reflux pump a.

[0006] Preferably, the anoxic tank replenishes anoxic mixed liquor from the water outlet end of the aeration tank through a reflux pump b.

[0007] Compared with the prior art, the beneficial effects of the utility model are: The utility model integrates a biochemical system and an evaporation system, can be directly produced in the factory, is convenient for transportation, has low operating costs, and the on-site overall installation is fast. It combines a complete set of biochemical processes such as an anaerobic fermentation tank, an anoxic denitrification tank, an aerobic nitrification tank, a sedimentation tank, and a clear water tank and an open evaporation process to meet the zero-emission requirements. Description of the Drawings

[0008] Figure 1 This is a schematic structural diagram of the present utility model.

[0009] In the figure: 1, collection tank; 2, sewage lift pump; 3, anaerobic tank; 4, anoxic tank; 5, aeration tank; 6, sedimentation tank; 7, clear water tank; 8, open evaporation screen; 9, water pump a; 10, spray head; 11, spray pipe; 12, return pump a; 13, return pump b; 14, collection trough. Specific embodiments

[0010] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0011] Please refer to Figure 1 , the present utility model provides a technical solution: an integrated open zero-emission device for organic wastewater, including a collection tank 1 and a rectangular treatment tank. The collection tank 1 is used to uniformly collect the wastewater to be treated. The inner cavity of the treatment tank is sequentially separated by partitions in the horizontal direction to form an anaerobic tank 3, an anoxic tank 4, an aeration tank 5, a sedimentation tank 6, and a clear water tank 7. The sewage in the collection tank 1 is pumped into the anaerobic tank 3 by a sewage lift pump 2. An aeration pipe group is arranged inside the aeration tank 5. The aeration pipe group accesses compressed air and diffuses it into the sewage, increasing the contact between oxygen and the sewage through aeration to make full reaction. The anaerobic tank 3 supplements anaerobic sludge from the sedimentation tank 6 through a return pump a 12, and the anoxic tank 4 supplements anoxic mixed liquid from the water outlet end of the aeration tank 5 through a return pump b 13.

[0012] A collection trough 14 covering the upper port is installed on the upper part of the treatment tank. An open evaporation screen 8 is installed on the upper part of the collection trough 14. The open evaporation screen 8 is provided with a plurality of equally spaced screen bodies along the length direction, and the upper ports of adjacent two screen bodies are open. A horizontally penetrating spray pipe 11 is fixedly installed at the top of the open evaporation screen 8. A plurality of uniformly arranged spray heads 10 are installed on the lower side of the spray pipe 11 along the length direction. The spray heads 10 are located between adjacent pipe screens. The spray pipe 11 pumps water from the clear water tank 7 through a water pump a 9. After the water droplets sprayed by the spray heads 10 are atomized and released, they fall on the screen bodies and evaporate as the air flows through. The water that is not evaporated flows into the collection trough 14 by gravity, and finally enters the biochemical system for cyclic treatment and then enters the open evaporation device for evaporation.

[0013] The mechanism of the open evaporation screen 8 is a combined effect of the activated sludge process and the biofilm process. In this treatment method, microorganisms such as bacteria, fungi, and protozoa grow and reproduce on the screen body of the open evaporation screen, forming a membranous biological sludge biofilm. When the sewage comes into contact with the biofilm, the microorganisms on the biofilm absorb the organic pollutants in the sewage as nutrients, purifying the sewage. In the air flow, the dissolved oxygen required for the metabolism of the microorganisms is obtained through atmospheric oxygenation. A thin water layer is formed on the surface of the evaporation screen, and the water layer absorbs dissolved oxygen from the air and provides the oxygen required for the growth of the microorganisms. The screen body material is composed of a modified fiber with high strength, corrosion resistance, and strong adhesion performance as the base material. The number and area of the screen bodies are balanced with the designed evaporation capacity and the water inflow. Finally, the wastewater reaches the zero-discharge requirement through the open evaporation screen 8.

[0014] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated open zero-discharge device for organic wastewater, comprising a water collection tank (1) and a rectangular treatment box, wherein the inner cavity of the treatment box is sequentially divided into an anaerobic tank (3), an anoxic tank (4), an aeration tank (5), a sedimentation tank (6) and a clear water tank (7) by partitions in the transverse direction, characterized in that: The sewage in the water collection tank (1) is pumped to the anaerobic tank (3) by a sewage lifting pump (2); an aeration pipe group is provided inside the aeration tank (5); the compressed air is connected to the aeration pipe group and diffused into the sewage; a water collection tank (14) covering the upper port is installed on the upper part of the treatment box; an open evaporation screen (8) is installed on the upper part of the water collection tank (14); a spray pipe (11) is fixedly installed on the top of the open evaporation screen (8) and runs horizontally; a plurality of uniformly arranged nozzles (10) are installed on the lower side of the spray pipe (11) along the length direction; the spray pipe (11) draws water from the clean water tank (7) through a water pump a (9).

2. The organic wastewater integrated open zero-discharge equipment according to claim 1, characterized in that: The anaerobic tank (3) is supplemented with anaerobic sludge from the sedimentation tank (6) via a return pump a (12).

3. The organic wastewater integrated open zero-discharge equipment according to claim 2, characterized in that: The anoxic tank (4) is replenished with anoxic mixed liquid from the outlet of the aeration tank (5) via a reflux pump b (13).

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