A zero-emission phosphating and saponification method based on a high-pressure closed circulation system
A circulatory system, zero-emission technology, applied in the direction of metal material coating process, etc., can solve the problems of corrosive three-waste pollution, consumption, poisoning, etc., and achieve the effect of good working conditions and convenient collection and treatment.
Active Publication Date: 2020-04-21
杨景峰 +3
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] When metal workpieces are derusted using the above process, they will be cleaned and derusted with hydrochloric acid, nitric acid and sulfuric acid according to different metals, which will generate toxic and choking yellow and red smoke, resulting in serious corrosive three waste pollution, and easy to clean The metal itself of the parts: the outer layer dissolves to form over-corrosion, and the inner hydrogen permeates to cause hydrogen embrittlement, which endangers the safety of use and shortens the service life
In addition, the whole process needs to be washed with water for many times. Washing with water to dilute the waste working fluid will consume and lose a large amount of water resources, resulting in serious pollution and great waste.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0019] Below in conjunction with accompanying drawing, preferred scheme of the present invention is further elaborated:
[0020] Such as figure 1 and figure 2 Shown, a kind of zero-emission phosphating, saponification method based on high-pressure closed circulation system, comprises autoclave, separation tank, buffer tank, hydraulic pump and recovery tank; Adoption steps are as follows:
[0021] Step 1, put the workpiece into the autoclave, and then seal it so that the pressure range of the autoclave is above 20MPa;
[0022] Step two, CO 2 Degreasing and derusting, the carbon dioxide is buffered by the buffer tank and sent to the autoclave through the hydraulic pump, and then the workpiece is sprayed with high-pressure carbon dioxide gas flow through the Venturi nozzle in the autoclave to derust and degrease the workpiece; in this step, mainly use The kinetic energy and momentum of the generated carbon dioxide "snow" (containing small dry ice particles) derusting, using t...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a zero-emission phosphating and saponification method based on a high-pressure closed circulation system, which includes an autoclave, a separation kettle, a buffer kettle and a hydraulic pump; the following steps are adopted: step 1, loading the workpiece into the autoclave, and then Carry out sealing to make the pressure-resistant range of the autoclave more than 20MPa; Step 2, CO 2 Degreasing and derusting; Step 3, cyclic separation; Step 4, high-pressure phosphating; Step 5, cyclic separation 2; Step 6, high-pressure saponification; Step 7, cyclic separation 3; Step 8, open the autoclave and ventilate and dry. Adopting the technical scheme of the application can greatly reduce the consumption of acid, alkali and industrial water, the working conditions are good, the production residues are conveniently collected and treated, no sewage is generated, no environmental pollution is caused, and zero discharge is realized.
Description
technical field [0001] The invention relates to the field of phosphating and saponification pretreatment in the metal cold processing industry, in particular to a zero-emission phosphating and saponification method based on a high-pressure closed circulation system. Background technique [0002] In the metal cold processing industry, when performing wire drawing, extrusion, deep drawing and other processes, phosphating-saponification treatment must be carried out on the surface of the workpiece first. After treatment, the friction between the workpiece and the mold can be reduced and the friction between the workpiece and the mold can be well lubricated. Effect. [0003] The specific process of phosphating treatment is as follows: first, the surface of the metal workpiece is degreased and derusted by acid and alkali, and the treated metal workpiece is cleaned with water; The surface of the workpiece is cleaned with water, and the surface of the metal workpiece is saponified...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/73
CPCC23C22/73C23C22/00C23C22/83C23G5/00
Inventor 杨景峰郁伟荣沈鹏汪海斌
Owner 杨景峰