Totally closed production technology of paints

Abstract

A totally closed production technology of paints selects a gravity and pneumatic-driving membrane pump to transmit power, different paint fineness requires the serial arrangement of different numbers of horizontal grinders for grinding, the paint fineness is qualified by the one-time grinding of the horizontal grinders, paint viscosity is qualified by detection, the paint flows into a fully closed filtering packaging machine at a first layer under the action of gravity, and the discharged material is weighed and packaged after filtering. A waste gas collecting hood is not only arranged at a fineness monitoring port, but also at a material-mixing position, a blending packaging pot and the fully closed filtering packaging machine, thus collecting waste gases generated in the whole procedure for centralized processing, greatly improving working environment and labor intensity, canceling all opening parts such as an opening intermediate paint cylinder, a flow conducting and adding port of a centrifugal pump and the like between the horizontal grinder and the blending packaging pot in the traditional production technology of the paint which is considered to be irreplaceable by persons in the same field, realizing full closing, fundamentally solving the problem of disorganized discharging in production of organic solvents, having the functions of protecting the environment and saving energy by adopting a clean-power pneumatic-driving membrane pump, and being the newly updated production technology in the paint industry.

Description

technical field [0001] The invention relates to a production method of paint, in particular to a fully enclosed production process for making solvent-based and water-based paints. Background technique [0002] In recent years, with the development of society and economy, the country has also increased its requirements for environmental protection. On April 23, 2007, the National Development and Reform Commission announced the "Evaluation Index System for Cleaner Production in Paint Manufacturing Industry" drafted by the Chemical Cleaner Production Center ( Trial Implementation), the evaluation index system stipulates the cleanliness indicators of paint production enterprises in more detail, and divides the clean production level of enterprises into two levels according to the scores obtained from the comprehensive evaluation, that is, "advanced clean production enterprises" representing the domestic advanced level and "advanced clean production enterprises" It is a "clean pr...

AI Technical Summary

Problems solved by technology

In the basket sanding process, the planar layout equipment adopts movable open cylinders with bottom pulleys. Although a certain degree of closure can be achieved during sanding (currently most of the basket sanding machines are open), but in the process of slurry circulation The movable cylinder is open, and this type of sanding process cannot be fully enclosed; in the closed vertical or horizontal sanding process, although the sanding machine itself is truly fully enclosed, because there is no solution to the control technology, it must be closed. In the sanding process, at least one open intermediate paint vat is connected. On the one hand, it is used as a buffer container for the front and rear sanding during multiple sandings. The paint paste meets the technical requirements of coating products, and this type of process is not fully enclosed; in the open vertical sanding process, there is not only an open middle paint paste tank, but also because of the openness of the open vertical sanding mill itself, so that VOC emissions are more serious

[0005] To sum up, none of the various sanding processes widely used today can be truly fully enclosed, but various forms of open work windows exist, resulting in the VOC contained in the coating itself in the sanding workplace. A large amount of emissions, and the heat generated by the sanding process accelerates the emission rate of VOC

At the same time, the cleaning and color changing of the exposed parts not only increases the workload of workers, but also has the disadvantages of wasting raw materials, increasing production costs, and increasing the amount of waste disposal.

Although the VOC in the open operation window can be collected, it requires a high-ventilation collection device, so it is difficult and costly. It not only wastes materials, but also consumes energy. It is difficult for paint manufacturers to afford the collection and treatment costs, resulting in widespread unorganized VOC emissions. Existence, the sanding place has a strong smell and poor air quality, which reduces the intrinsic safety for solvent-based coating manufacturers, and does not meet the requirements of the clean production evaluation index system of the paint manufacturing industry, which has become a key factor restricting the clean production of paint companies

[0006] Although the patent application number 02137086.9 "Paint Production Method" concentrates the production processes so that the entire production process can be automated in a relatively closed state and reduces labor intensity, the production process is cumbersome and the intermediate links such as various feeding tanks and equipment There are many pumps, and the operation is troublesome and the cycle is long. At the same time, because it also uses the traditional basket sand mill for sanding, there is an open operation window, and there is still organic gas discharged to the outside, causing environmental pollution. The operation environment is not ideal, and the same cannot be achieved. Clean production advanced enterprise" requirements

Images