Devices for treating waste water containing organic solvents

Abstract

The invention discloses a wastewater treatment method containing an organic solvent and also includes a treatment device using the method. The device includes a molecular sieve column, one end of which is provided with a waste water inlet, and the other end is provided with a clean water outlet. The end of the molecular sieve column with the waste water inlet is also provided with a condenser, and the condenser is also connected with a solvent tank. The molecular sieve column is provided with a clean water outlet. There is also a solvent vapor inlet at one end of the condenser, a cooling water inlet and a cooling water outlet on the condenser, and a solvent recovery port on the solvent tank. By letting the wastewater flow through the molecular sieve, the molecular sieve absorbs the organic solvent in the wastewater. When the molecular sieve absorbs a certain amount of organic solvent, the same type of organic solvent vapor is passed into the molecular sieve to separate the organic solvent adsorbed in the molecular sieve and become organic solvent vapor. ; Cooling the obtained organic solvent vapor, so that it is converted into liquid recovery, and once again into the waste water, continuous cycle treatment and other steps can effectively treat the waste water that also has organic solvents.

Description

technical field [0001] The invention relates to a method for treating waste water, in particular to a method for treating waste water containing organic solvents, and also relates to a device for treating the waste water. Background technique [0002] Sewage containing organic solvents is often produced in industrial production processes. At present, methods such as rectification, adsorption, and extraction are often used to recover organic solvents in wastewater. However, in the actual application process, these methods have certain defects. [0003] For example, if the concentration in the wastewater is not high and the boiling point of the organic solvent in the wastewater is higher than that of water, a large amount of water needs to be evaporated when rectification is used for recovery. There is a problem of large energy consumption in recycling organic solvents. [0004] The disadvantage of high energy consumption can be overcome by the extraction method. However, th...

AI Technical Summary

Problems solved by technology

However, the main disadvantages of the currently widely used adsorption method for treating wastewater are: (1) activated carbon has a certain adsorption capacity for moisture, and activated carbon can absorb a certain amount of moisture while absorbing organic solvents; (2) dichloromethane is highly toxic, There is also the possibility of polluting the environment

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