Electrochemical hardness-removing and turbidity-removing integrated device for processing coal gasification grey water or black water, method for processing coal gasification grey water or black water and application of electrochemical hardness-removing and turbidity-removing integrated device

Abstract

The invention provides an electrochemical hardness-removing and turbidity-removing integrated device for processing coal gasification grey water or black water, a method for processing coal gasification grey water or black water and application of an electrochemical hardness-removing and turbidity-removing integrated device. The device comprises an electrochemical reaction area, an alkalinity regulating area and a settling area which are sequentially connected. The method includes: performing electrochemical processing on to-be-processed coal gasification grey water or black water, generating flocculation nucleuses in an in-situ manner, and forming a flocculation nucleus network; regulating the alkalinity of the coal gasification grey water or black water after the electrochemical processing to allow the scaling ions in the coal gasification grey water or black water to have reaction to generate sediments, and processing the sediments to obtain processed coal gasification grey water or black water. The method has the advantages that integrated full-automatic control is adopted, the hardness, turbidity or suspended matter of a coal gasification grey water / black water system are removed effectively, the scaling tendency of the system is lowered, system heat exchanging efficiency is increased, long-term stable operation of the system is guaranteed, and the method can be widely popularized and used in the field of coal gasification.

Description

technical field [0001] The invention belongs to the technical field of coal gasification gray water or black water treatment, and relates to a device for treating coal gasification gray water or black water and its treatment method and application, in particular to an electrochemical removal method for treating coal gasification gray water or black water. An integrated device for removing turbidity and its processing method and application. Background technique [0002] The coal gasification gray water / black water system is an important part to ensure the stability of the gasifier and the normal operation of the entire coal gasification process. Its main features are: high temperature and wide range of changes; high content of calcium ions, magnesium ions and silicon dioxide , mainly due to high calcium hardness; high content of suspended solids and high turbidity in gasification black water. When the above factors are serious, it will lead to the deposition of suspended so...

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Problems solved by technology

[0008] Aiming at the problems that the existing coal gasification gray water or black water treatment process cannot effectively solve the problem of scaling and fouling, as well as the long reaction and sedimentation time, low softening efficiency, large amount of sludge and large area occupied by the sedimentation tank, the present invention provides An electrochemical hardening and turbidity removal integrated device for treating coal gasification gray water or black water, and its treatment method and application

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