Introduction to high pressure water jet cleaning
1. Development of foreign water jet technology
High-pressure water jet cleaning technology is a high-tech cleaning technology that has emerged in the world in recent years. The high-pressure water jet cleaning has the advantages of low cleaning cost, high speed, high clean rate, no damage to the object to be cleaned, wide application range, and no pollution to the environment. Since it was introduced to China in the mid-1980s, it has gradually gained widespread recognition and attention from the industry. The cleaning techniques used in traditional cleaning operations include mechanical drilling, steam cleaning, chemical cleaning, ultrasonic cleaning, and water jet cleaning. Western developed countries such as Japan, Europe and the United States mainly used chemical cleaning before the 1970s. Since the late 1970s, high-pressure water jet cleaning technology has been developed. So far, high-pressure water jet cleaning has become the mainstream cleaning technology in the western countries, accounting for more than 80% of the cleaning industry market share. In the United States, high-pressure water jet cleaning has accounted for 90% of the cleaning industry, with a market share of 1 billion. Dollar.
High-pressure water jet equipment manufacturing: Germany has strong advantages in this field due to its high technical level and high level of machining. For example, Hammerman, Uraka, Woma, Avatar and Fulu in the United States also have higher Level. At present, only FLOW, Gardner, NLB, JETECH Germany’s HAMMELMANN, URACA, WOMA and other companies have ultra-high pressure pump type cleaners of up to 250Mpa.
2. Development of high pressure water jets in China
China’s cleaning industry has been in a backward state of chemical and manual cleaning for many years. According to statistics, 80% of industrial cleaning in China is currently a chemical method. Whether it is chemical cleaning or manual cleaning, there are problems such as high cleaning cost, low efficiency, and environmental pollution, which are far from meeting the growing industrial and civil cleaning requirements of modern society.
High-pressure water jet cleaning technology was rapidly popularized in the mid-1990s after it was introduced to China in the mid-1980s. At present, high-pressure water jet cleaning has exceeded 20% in the field of industrial cleaning in China, and is growing rapidly. With the continuous improvement of the efficiency, cleanliness rate and environmental protection requirements put forward by the modern society in the cleaning industry, the popularization and application of high-pressure water jet cleaning technology in China is an inevitable trend.
In terms of equipment manufacturing: although it started late in China, it has made remarkable progress through introduction, digestion and absorption. Some domestic users purchase imported ultra-high pressure units, which has improved the application level of domestic ultra-high pressure water jets to a considerable extent, but at the same time It is also plagued by high spare parts prices, long lead times, and technical support. In order to meet the domestic users’ demand for ultra-high pressure pump units, domestic high-pressure water jet manufacturing enterprises are also competing for research and development or introduction.
3. Technical characteristics of high pressure water jet
High-pressure water jet cleaning is a physical cleaning method. Compared with traditional manual, mechanical cleaning and chemical cleaning, it has the following advantages:
(1) The pressure and flow rate of the water jet can be easily adjusted so as not to damage the substrate of the object to be cleaned.
(2) High-pressure water jet cleaning will not cause pollution. If there is no special requirement after cleaning, no clean treatment is needed.
(3) Cleaning objects with complicated shapes and structures can be cleaned in a space where the space is narrow or the environment is bad.
(4) High-pressure water jet cleaning is fast and thorough. For example, the clearing rate of the sewer pipe is 100%, the cleaning rate is over 90%, the cleaning rate of the heat exchanger is over 95%, the descaling rate of the boiler is over 95%, and the time for cleaning each pipe is 2~3. minute.
(5) The cleaning cost is low, about 1/3 of the chemical cleaning, that is, the high-pressure water jet cleaning belongs to the fine jet. In continuous conditions, the water consumption is 1.8~4.5m3/h, and the power is about 35~90KW. It is an energy-saving device.
(6) High-pressure water jet cleaning is widely used. Any part where the water jet can be directly injected, whether it is the inner space of the pipe and the container, or the surface of the equipment, whether it is a hard scale or a solid blockage, can be quickly removed from the bond matrix and thoroughly cleaned. High-pressure water jet cleaning has no special requirements on the material, characteristics, shape and scale of the equipment, only water jets can be achieved.
(7) Unlike chemical cleaning, high-pressure water jet cleaning has no harmful substances and environmental environmental problems. After the materialization of water jets, it can reduce the air dust concentration in the working area and protect the environment.
The cleaning industry has always been an essential part of industrial and civilian use. Compared with other cleaning methods, high-pressure water jet cleaning has unparalleled advantages in terms of cleaning effect and efficiency, cleaning cost, and environmental protection. Its popular application is an inevitable trend.
