Treating and resourceful recycling system and method for scouring waste water

Abstract

The invention provides a treating and resourceful recycling system and method for scouring waste water. The treating object of the system and method is scouring waste water in industries like textiles, papermaking and printing and dyeing. The method main adopts the principle of integrated novel technology of waste water pretreatment, evaporative concentration, flocculation extraction and recycling. The method is characterized by comprising the following steps: pretreatment (I) of scouring waste water so as to realize deposition, preliminary filtering and saponification of scouring waste water; evaporative concentration (II) of pretreated waste water so as to recover heat energy in waste water and increase solid content of waste water; flocculation extraction (III) of waste water having undergone evaporative concentration so as to separate organic matters like pectin and hemicellulose in waste water and further increase the concentration of alkali lye in waste water; and recycling (IV) of separated organic matters and alkali lye. The method can be used in treating and resourceful recycling equipment for scouring waste water, is convenient for engineering realization and has high cost performance.

Description

technical field [0001] The invention relates to the field of equipment for recycling and reusing waste water resources in textile, papermaking, printing and dyeing industries, etc., in particular to a system and method for treating and recycling smelting waste water. Background technique [0002] With the rapid development of modern industry and the continuous expansion of urban scale, the discharge of wastewater is also increasing. According to statistics, in 2008, my country's industrial wastewater discharge was 24.17 billion tons, accounting for 42.3% of the total wastewater discharge. At present, the total annual discharge of sewage and wastewater in the country is about 62 billion tons, and industrial wastewater accounts for about 66%. Among them, the proportion of scouring wastewater discharged from the rapidly developing hemp spinning, printing and dyeing, papermaking and other industries has greatly increased in recent years. The pollutant composition of smelting wa...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: in order to overcome the deficiencies of the above-mentioned prior art, in view of the current domestic hemp spinning, printing and dyeing, papermaking and other industries in the treatment of industrial wastewater, energy and resources cannot be fully recycled and reused, and wastewater treatment facilities have invested funds In order to solve the problem of high operating cost of waste water treatment, a system and method for the treatment of smelting wastewater and resource recovery and reuse are provided. The smelting wastewater is directly used as boiler water, and the heat energy, water resources, organic matter and Recycling and reuse of inorganic substances has obvious economic benefits

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