Aluminum alloy chemical milling waste liquid treatment method, process and system
A treatment process and treatment system technology, applied in the field of metal processing waste liquid treatment, can solve the problems of not really achieving recycling, huge expenditures of enterprises, environmental damage, etc., to save treatment costs, stabilize processing parameters, and save costs Effect
Inactive Publication Date: 2017-04-12
王润强
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Problems solved by technology
This "waste liquid" treatment method is designated by the environmental protection department to send it to a qualified environmental protection unit for unified treatment. However, these "waste liquids" that have been uniformly treated have not been scientifically and rationally used effectively. It is just a comprehensive collection and solidification, and it is finally accepted by the environment in different forms
This "waste liquid" treatment method has caused huge expenses to the enterprise and also caused immeasurable damage to the environment.
[0011] To sum up, so far, the treatment of aluminum alloy milling waste liquid is limited to the level of comprehensive utilization, and with the generation of secondary pollution, it has not really achieved recycling and recycling
Method used
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Embodiment 1
[0066] Preferred embodiment 1: The operating pressure of the selected membrane separator 2 is 0.3Mpa, and the temperature is 50°C;
[0067] a. The chemical milling waste liquid is transported into the membrane separator 2 by the No. 1 pump 1, and the chemical milling waste liquid in the membrane separator 2 passes through the filter tube 24 distributed in the membrane under the action of pressure and enters the membrane through the membrane wall In the central tube, and discharged into the membrane filter body, so that the sodium hydroxide solvent in the waste liquid can be permeated and collected, and the concentration of the impermeable matter intercepted by the outer wall of the membrane filter tube increases gradually. When the solid concentration increases to a certain level, the membrane is filtered Stop the device, stop the No. 1 pump 1 from entering the liquid, open the No. 1 valve 101, and the No. 3 valve 103. Inject the compressed air to make the liquid pass through t...
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The invention discloses a treating method, technology and system for recovering the raw material--a sodium hydroxide solution from a waste aluminum alloy chemical milling solution, directly returning the recovered sodium hydroxide solution to a chemical milling tank for cyclic usage and adjusting and controlling the concentration of Al<3+> in a chemical milling solution in the chemical milling tank. The treating method for the waste aluminum alloy chemical milling solution comprises the following steps: filtering the waste aluminum alloy chemical milling solution and separating a solid and a liquid; subjecting treated solid sludge to draining, emptying, leaching and back flushing and then discharging the solid sludge to a sludge tank. subjecting a treated penetrating fluid to dialysis and diffusion so as to obtain a purified sodium hydroxide solution and raffinate and discharging the raffinate to the sludge tank. subjecting sludge collected in the sludge tank to modification and chemical dosing, adding a coagulant aid to allow the sludge to form a flocculated easy-to-filter body and carrying out curing; and recovering and reusing the purified sodium hydroxide solution and adjusting processing parameters of the chemical milling solution.
Description
technical field [0001] The invention relates to a method for treating waste liquid in metal processing, in particular to a method for processing waste liquid in aluminum alloy milling. [0002] The present invention also relates to a process flow and system for treating metal processing waste liquid by using the above method, especially a process and system for processing waste liquid in aluminum alloy milling. Background technique [0003] Chemical milling is a surface treatment method that can make parts with complex surface shapes and high processing precision meet the processing requirements. The processing process is to protect the metal surface of the product to be processed with a deep protective material, and then peel off the protective material on the surface of the product to be processed, so that the metal surface to be processed is exposed, and the product is placed in the product In the corrosive liquid of the processing material, the metal material to be proc...
Claims
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IPC IPC(8): C23F1/46C23F1/36
Inventor 孙砚楼王润强王毅张玉军郭水春
Owner 王润强
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