Large-scale fully-enclosed air-flotation device and application of large-scale fully-enclosed air-flotation device in treatment of viscose fiber wastewater

Abstract

The invention discloses a large-scale fully-enclosed air-flotation device and application of the large-scale fully-enclosed air-flotation device in the treatment of viscose fiber wastewater. The large-scale fully-enclosed air-flotation device mainly comprises a pressure air-dissolving system, an air release system and an air-flotation separation device; the pressure air-dissolving system mainly comprises an air-flotation air-dissolving pump, an air-flotation air-dissolving tank and an air-flotation air compressor; and the air release system mainly comprises a air-dissolving releaser and a air-dissolving water pipe, the air-flotation separation device mainly comprises an air-flotation pool, and the air-flotation pool comprises an air-flotation contact chamber, an air-flotation separation chamber and an air-flotation clear water area from left to right in sequence. The front end of the air-flotation contact chamber is connected with an air-flotation flocculation pool and an air-flotationmixing pool in sequence. A chain plate type slag scraper is arranged on the upper part of the air-flotation separation chamber. An air-flotation slag groove is formed in the upper part of the side, close to the air-flotation clear water area, in the air-flotation separation chamber, and a plurality of groups of sludge hoppers are arranged on the lower bottom surface of the inner part of the air-flotation separation chamber. The large-scale fully-enclosed air-flotation device is mainly used for treating the viscose fiber wastewater, has the advantages of high treatment capacity (320m<3> / h or above), high efficiency, corrosion resistance, safety, environmental protection and the like, and has potential application prospects.

Description

technical field [0001] The invention relates to the technical field of water treatment equipment, in particular to a large fully enclosed air flotation equipment and its application in viscose fiber wastewater treatment. Background technique [0002] Viscose fiber is a renewable fiber prepared from abundant and cheap cotton, bamboo, wood and other natural fibers through a series of complex physical and chemical reactions. It is the most similar to natural fiber in chemical fiber quality. , is also one of the extremely important raw materials for the textile industry. As a big viscose fiber producing country, my country ranks first in the world in viscose fiber production. The viscose fiber industry has made great contributions to my country's economy, finance, export and employment. In recent years, after long-term exploration and technological breakthroughs, the viscose fiber industry is developing towards scale and intensification. However, the environmental problems bro...

AI Technical Summary

Problems solved by technology

Chinese patents CN104058539B, CN109437480A and CN103864260A and other series of patents disclose the method and process of using air flotation technology to efficiently treat wastewater in the viscose fiber industry, but these patents do not specify the composition and structure of the air flotation equipment

At the same time, considering that viscose fiber wastewater not only contains suspended matter but also contains high concentrations of highly volatile H 2 S and CS 2 and other toxic substances, the use of traditional open small air flotation equipment will cause H 2 S and CS 2 The gas is exposed to the air, causing air pollution and endangering the life and health of operators, etc.

In addition, with the large-scale and intensive development of the viscose fiber industry, the waste water produced by its production will not only change in the amount of waste water, but also in its composition and concentration. Heat transfer will also change, so it is difficult to meet the large-scale application requirements of traditional small air flotation equipment by simply scaling up and preparing large air flotation equipment

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