A microbubble circulation reaction system

Abstract

The invention relates to a microbubble loop reaction system and belongs to the technical field of sewage treatment equipment. The microbubble loop reaction system comprises a water channel, a liquid inlet pump, a gas inlet pump and a loop reactor, wherein the inlet of the liquid inlet pump communicates with the outlet of the water channel through a pipeline; a mixed gas and liquid inlet is formed in the bottom of the loop reactor; and a water outlet is formed in the side wall of the loop reactor. The microbubble loop reaction system comprises a Y-type gas-liquid mixer, wherein the outlet of the Y-type gas-liquid mixer communicates with the loop reactor through a flow guide pipe which penetrates the bottom of the loop reactor and extends into the loop reactor. As the multi-stage Y-type gas-liquid mixer is adopted, gas and liquid are fully mixed in the Y-type gas-liquid mixer, and then the mixture is guided through a plurality of guide cylinders; as gas and liquid are mixed during liquid ascending-liquid descending-liquid ascending-liquid descending self-circulating flowing, on one hand, microbubbles can be effectively prevented from combination in the ascending process, on the other hand, the mass transfer effect and the heat transfer effect between gas and liquid can be enhanced, and the cavitational degradation capability of water is improved; and besides, the microbubble loop reaction system is low in energy consumption and operation cost and suitable for industrial application.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment equipment, and in particular relates to a microbubble circulation reaction system for strengthening gas-liquid mixing. [0002] technical background [0003] According to my country's water quality survey in 2014, half of the top ten water systems in the country are polluted; 40% of the nationally controlled key lakes are polluted; 17 of the 31 large freshwater lakes are polluted; among the 9 important bays, Liaodong Bay, Bohai Bay and Jiaozhou Bay The water quality is poor, and the water quality of the Yangtze River Estuary, Hangzhou Bay, Minjiang Estuary and Pearl River Estuary is extremely poor... The survey of water bodies in 118 large and medium-sized cities shows that severe pollution accounts for 40%, and surface water is inferior to Class V (water that has lost its use function) The proportion of sections is more than 30%, and the polluted groundwater accounts for one-third. Among th...

AI Technical Summary

Problems solved by technology

Although the pore size of the gas distribution disk is micron, a large amount of gas is ejected from the gas distribution disk at the same time. These tiny bubbles are densely crowded together, and inevitably collide and fuse together to form large bubbles during the ascent process. This brings two adverse effects: 1) The large buoyancy of the large bubbles and the small drag force of the liquid cannot be brought to the descending section by the circulation; 2) The area of ​​the gas-liquid interface is reduced, which is not good for mass transfer, and the treatment effect will be greatly reduced

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