Chen Chusheng’s “When trains enter this strange city†let us know that there is a need for tunnels between cities, and Stefanie Sun’s “I hear the wind coming from the subway and the sea of ​​people†can tell you the need for a subway tunnel. One of the reasons for the cleaning, "because the air on the subway train comes from the tunnel, the air in the station also comes from the wind in the tunnel brought by the piston effect when the train is running, so if the tunnel dust is too large, the air on the train and the station It will certainly be contaminated. In order to reduce the passengers' dissatisfaction with the ride, each operating subway line regularly performs large-scale cleaning inside the tunnel. In the past, the cleaning of tunnel walls was carried out in an artificial semi-mechanized manner. It was quite troublesome and unsafe. Many companies have also come to develop a manual cleaning that can replace inefficient, high-cost, and a tunnel cleaning truck can top 50 workers. I remember there was a time when I saw a "big guy" washing the face of the tunnel. At that time, I didn't understand how it was operated. I only knew where it passed and was washed. Later, when I checked the information, I realized that the driver was responsible for driving in the front cab and the operator adjusted the angle and height of the roller brush in the rear operation room. During cleaning, the atomized water spray system at the front of the roller brush sprays the wall surface with detergent water in advance. After the roller brush rotates tightly against the wall and rotates to clean it, the water nozzle in the back row of the roller brush is brushed. Spraying fresh water for showering makes the cleaning work very thorough. 90% of cleaning operations in tunnel cleaning vehicles do not need to be sealed. The impact on the passage of tunnel vehicles is also minimized, and the life safety and health of tunnel workers are effectively guaranteed. This shows that the tunnel cleaning truck is an indispensable service vehicle for subway operation. More and more dedicated cleaning vehicles will replace the manual cleaning operation. According to the survey, many workers who maintain the clean environment of the subway are also very fond of it, after all, mechanized products are more likely to bring benefits to the city, but also reduce their operating intensity. Especially in bad weather conditions, using a tunnel cleaning car is essential! Vacuum freeze drying technology is currently the most advanced food drying dehydration processing technology, compared with other drying or air drying method. Vacuum freeze drying produce of freeze-dried food, can not only keep the very good material color, appearance, taste and nutrition, etc., and can save for a long time, after water is wonderful, and convenient transportation. After drying of food volume, shape, material is spongy and swear shrinkage phenomenon, can be widely used in vegetables, fruits, spices, aquatic products, biological products, medicine, Chinese herbal medicine, beverage, chemical industry, etc. Freeze drying machine,Vacuum freeze drying machine Changzhou Ruide Drying Engineering Technology Co., Ltd , http://www.rddryer.com
September 21, 2019