MVR energy-saving and environmentally-friendly sewage treatment system utilizing new energy

Abstract

The invention provides an MVR sewage treatment system utilizing solar energy and belongs to the technical field of energy conservation and environmental protection. A two-stage preheating / cooling modeis realized by adopting a separation subsystem and a waste heat recovery subsystem; in combination with solar subsystem preheating, and steam compression recycling in a concentration and drying subsystem, waste heat is maximally recycled, so that the cost is effectively reduced. The concentration and drying subsystem realizes the effective separation of a sewage solid, purified water and waste gas and gives full play to the advantages of a heating distillation mode for sewage treatment. According to different saturated steam pressures and temperatures, by adopting stepped utilization, the consumption of external steam is reduced by adopting stepped utilization, and the stable and continuous operation of the two sets of MVR systems is ensured. The MVR sewage treatment system has the advantages of being simple in structure, easy to realize and lower investment and operation cost, is extremely significant in energy-saving and environmentally-friendly effects and can be applied to the treatment of all kinds of sewage and sludge as well as the other fields with similar processes, such as food, feed, chemical industry, pharmacy and the like.

Description

technical field [0001] The invention relates to a sewage treatment system, in particular to a sewage treatment system which uses solar energy to preheat and utilizes MVR technology to fully recover and utilize steam waste heat. It belongs to the technical field of energy conservation and environmental protection. Background technique [0002] Common sewage or wastewater, including domestic sewage, industrial sewage, garbage seepage, river and lake sewage, etc., currently adopts biological bacteria technology, membrane filtration technology, etc., which can achieve a good treatment effect, but the above-mentioned technology has a good effect on sludge difficult to deal with effectively. [0003] Moreover, sewage, waste water, and sludge generally contain a large amount of recyclable substances, as well as bacteria, microorganisms, waste gas, etc., which are treated by heating and distillation, which has a relatively better effect: heating by distillation It can kill most ba...

AI Technical Summary

Problems solved by technology

It solves the problems of excessive energy waste and poor environmental protection effect in the existing sewage treatment process, and provides an effective solution for the maximum utilization of waste heat; the structure is simple, easy to implement, and the investment and operation costs are low. Extremely significant energy saving and environmental protection effects, can be widely used in the treatment of various sewage and sludge, and other fields with similar processes such as food and feed, chemical industry, pharmaceuticals, etc.

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