Efficient micropore aeration reactor for sewage treatment

Abstract

The invention relates to an efficient micropore aeration reactor for sewage treatment, belonging to the field of sewage treatment equipment. According to the efficient micropore aeration reactor, a reaction box body of the micropore aeration reactor is longitudinally separated into a plurality of identical reaction units by separation boards, a communicating hole is correspondingly formed in the upper part of each separation board, and a closing piston is arranged at the opening in the top of each reaction unit; a spray pipe, a plug flow pipe and a micropore aeration pipe are respectively arranged in each reaction unit, the bottoms of the spray pipe and the plug flow pipe are respectively connected with a circulating water header pipe through valves; each reaction unit is communicated with the circulating water header pipe through the center of a base plate; and each micropore aeration pipe is respectively communicated with a gas transmission header pipe through gas transmission main pipes. The efficient micropore aeration reactor is controlled through the relevant reaction units to respectively work in different modes, namely main aeration and water circulation, and is controlled to work in an alternative changing manner, so that the transmission quantity of oxygen in the reactor is increased, the distribution uniformity of dissolved oxygen in a water body is improved, the use ratio of the oxygen during micropore aeration and the sewage treatment efficiency are improved, and the energy consumption during sewage treatment is effectively reduced.

Description

technical field [0001] The invention relates to a high-efficiency microporous aeration reactor for sewage treatment, which belongs to the field of sewage treatment equipment. Background technique [0002] At present, the problems of excessive energy consumption and high operating costs of urban sewage treatment plants have become increasingly prominent, which have become the main factors restricting the operation of sewage treatment plants. Studies have shown that more than 80% of the energy consumption of urban sewage plants is concentrated in the necessary aeration reactors in the sewage treatment process. Improving the efficiency of the aeration reactors is the key to the efficient and low-consumption operation of sewage treatment plants. Common aeration reactors are mainly divided into two categories: blast aeration reactors and mechanical aeration reactors. The microporous aeration reactor in the blast aeration reactor is the most widely used because of its relatively ...

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Problems solved by technology

This type of reactor often has the following main problems in actual operation: (1) The rising speed of microbubbles is too fast, and the mass transfer efficiency is not high

The microbubbles in the microporous aeration reactor are pressurized air bubbles, and the internal pressure is relatively large. Because the top of the microporous aeration reactor is open, the air above the water surface is normal pressure air, and the pressure of the air is transmitted to the water body through the water surface of the reactor. The pressure is formed on the surface of the microbubbles that act in the water body to move upward in a straight line, and this pressure is the resistance of the upward movement of the microbubbles, but because the air pressure is not high, the resistance is small, so these microbubbles in the reactor The rising speed is very fast, so the contact time with the water body is very short, the amount of oxygen in the microbubbles is transferred to the water body is also small, and the mass transfer effect is not good; fully utilized

Because the top of the microporous aeration reactor is open, the microbubbles burst after overflowing the water surface. There is still a large amount of oxygen in these broken microbubbles that is not transferred to the water body but is directly released into the air. Therefore, the oxygen in the microbubbles is not (3) The horizontal distribution of dissolved oxygen in the water body is uneven after aeration

After the microbubbles escape from the air diffusion device, they move straight up in the water body. There is a certain distance between the trajectory of each microbubble, which leads to the higher the dissolved oxygen content in the water body closer to the microbubbles, and vice versa. Low, so the dissolved oxygen in the reactor water is unevenly distributed in the horizontal direction, which affects the treatment effect; (4) The longitudinal distribution of dissolved oxygen in the water body is uneven after aeration

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