Process and device for stripping and recovering feed liquid on surface of workpiece by using circulating compressed gas

Abstract

The invention provides a process and device for stripping and recovering feed liquid on the surface of a workpiece by using circulating compressed gas. The device comprises a circulating gas supercharging unit, an air conveying pipe, a stripping unit and a recovered feed liquid lifting unit which are connected in sequence; the circulating gas supercharging unit comprises a supercharger; an air inlet of the supercharger is connected with an exhaust port of a tail gas air cavity, and an air outlet of the supercharger is connected with an inlet of a compressed gas air cavity; an air inlet connected with the air outlet of the supercharger is formed in the stripping unit, and air blowing openings are formed in the inner wall of a supercharged gas air cavity; an air guide hole plate is arrangedat the bottom of a stripping chamber; the central area of the stripping unit is divided into the stripping chamber and a gas-liquid separation chamber up and down by the air guide hole plate; flow guide holes are formed in the air guide hole plate, and a formed gas-liquid mixture enters the gas-liquid separation chamber; a filter material is arranged in the gas-liquid separation chamber, and gas guide nets are arranged on the periphery of the gas-liquid separation chamber; and the annular tail gas air cavity is formed in the periphery of the gas guide nets. The device combines multiple functions, is simple in structure and has a high feed liquid recovery rate.

Description

technical field [0001] The invention belongs to the technical fields of clean production of resource recovery, water saving and emission reduction, and environmental pollution prevention and control, and in particular relates to a process and a device for blowing off and recovering material liquid on the surface of workpieces with circulating compressed gas. Background technique [0002] After surface treatment of the workpiece (such as pickling, oxidation, electroplating, electrolysis, electrophoresis, phosphating, etching, etc.) The cleaning process can only be removed after cleaning. The cleaning process is the core pollution production process of heavy metals, cyanide, acid, alkali, nitrogen, fluorine, phosphorus, sulfur and other pollution sources in the surface treatment industry. Under the circumstances, the amount of cleaning water used in this process (or the amount of cleaning sewage produced) is in a linear relationship of 1:1 with the amount of material liquid ca...

AI Technical Summary

Problems solved by technology

[0005] The disadvantages of blowing and spraying deliquoring method are: a. Two kinds of gases, clean gas and mist, are required to blow the material liquid on the workpiece at the same time, and there is a complex structure of the blowing off system; The feed liquid oxidized by the air needs to use inert gas as the cleaning gas); c. The stripping tail gas carrying the feed liquid needs to be purified before it can be discharged up to the standard, which increases the treatment investment and processing cost. Although it can meet the standard, it cannot be discharged zero

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