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Industrial cleaning is closely related to various industrial activities, and some are an integral part of the product production process. Cleaning does not provide a final product, but rather is a partial process, process, or ancillary activity in many industrial processes. In some traditional industries, cleaning has been regarded as a simple process or common sense, which is often not valued by people, but the quality of cleaning determines the performance and quality of the final product, especially in today's high-tech industry. The role of cleaning technology is particularly prominent.

(1) General industrial cleaning

General industrial cleaning. Such as boiler pipeline petrochemical equipment usually use acid-base and some active substances as cleaning agents, similar to civil cleaning, usually with the naked eye can not see the dirt as the standard. Such as cars, trains, airplanes, ships and other surface cleaning; building walls, doors and windows, glass cleaning; oil pipelines, oil, oil storage tanks, equipment pipelines, boilers, air conditioning equipment maintenance cleaning. Its characteristic is that after cleaning, it can significantly improve the look and feel, improve the grade, improve and restore the performance of the equipment. Generally, there is no need for complicated equipment and technology, no need for high-purity cleaning agents, and no need for a clean environment.
Usually use ordinary water, acid, alkali and heating, high-pressure water, high-pressure air, the use of brush, friction and other physical and chemical methods to complete the cleaning process, many belong to manual operation, labor intensity, high risk, low technical content, ordinary people can be engaged in rough type, low value-added labor.
The cleaning equipment used in general industrial cleaning mainly includes high-pressure water jet installation, automatic car washing installation, high-rise exterior wall cleaning installation, etc.

(2) Precision industrial cleaning

In many processing industries, some intermediate processes need to be cleaned first before the next process can be carried out, and some of the final products need to be cleaned again. Such as metal, plastic parts and glass in electroplating, painting, vacuum coating before precision cleaning, in order to remove oil and dirt; textile industry in cotton, wool, silk, linen and other scouring cleaning; paper industry in degreasing, deinking cleaning. Precision industrial cleaning is directly related to product quality and performance, if the residual dirt is greater than the requirements, there will be bubbles, peeling, defects and other problems, generally need special cleaning equipment and process. There are certain requirements for the purity of the cleaning agent, the water must be purified, and some of the working environment requires a clean room. Because the cleaning technology and equipment used in the production process of different industries and products are very different, even if the same products, enterprises of different sizes and different investment levels, the cleaning process and cleaning equipment are also different. The same metal parts processing enterprises, large investment may use full-automatic running water cleaning line, while small investment may use manual washing, first with diesel oil to remove oil and metal chips, and then solvent oil removal and fine washing; Large-scale automatic cleaning and installation may require tens of millions or even hundreds of millions of dollars. However, enterprises with small investment may only spend tens of thousands of yuan to buy a single-tank or multi-tank cleaning machine, and some even have several pots and cans. The mainstream technology commonly used in the field of precision industrial cleaning is a combination of ultrasonic steam washing (heating) and spraying. Using water washing process, solvent recovery and regeneration stations need to be added to increase the drying process and the auxiliary pure water preparation and sewage treatment using solvent cleaning agents. Solvents with relatively low boiling points should also be condensed and sealed. Using solvents with high boiling points, drying equipment should be added; and the use of flash point of the solvent to increase the explosion-proof measures.
In recent years, some new cleaning technologies and equipment have been gradually developed and applied, such as vacuum cleaning, plasma cleaning, UV/odor hydrogen cleaning, laser cleaning, dry ice cleaning, etc., showing good results and application prospects. At the same time, with the improvement of the overall level of industry, cleaning-free technology has also begun to be promoted, especially in the fields of electronic industry and precision machining, clean packaging technology can make components and silicon wafers "out of the box". The development of solid flux has made the circuit board cleaning-free technology increasingly popular. Some precision metal processing uses no residue stamping or drawing oil, combined with the next blackening process, to directly heat and volatilize the processing oil, to achieve no cleaning, in the color picture tube shadow mask production process has been applied.
The cleaning equipment, cleaning agent and cleaning technology needed for precision industrial cleaning can now be basically based in China. Shenzhen United Environmental Protection Equipment Co., Ltd. and other professional cleaning equipment production units have won the bid in international public bidding for many times, and mass production of stand-alone automatic and complete sets of large-scale cleaning equipment, after acceptance by domestic and international experts, can fully meet the needs of China's cleaning industry.

(3) Ultra-precision industrial cleaning

At present, microelectronics technology has developed to the level of nano-technology, and a 90-nanometer production line is already under construction. Wavelength division multiplexing optoelectronic devices (DWDM), which are widely used in communication equipment, have a resolution to accurately separate and identify different wavelengths of light. The cleaning of such products should reach a near perfect level, and the diameter of the residual dirt should be about 0.1nm, which is difficult to observe by ordinary electron microscope. Ultra-precision industrial cleaning must be carried out in a super-purified environment, requiring the use of ultra-high purity cleaning agents and DI water (deionized water), as well as advanced cleaning equipment. In addition to some simple equipment, there is no enterprise in China that can provide such technology and equipment, basically relying on imports.