With the improvement of the national economy, urban construction continues to develop. The current sanitation work has been completely developed towards mechanization, and various sanitation vehicles have been continuously developed and widely put into use. Among them, the cleaning and dredging vehicles specially used for pipes and septic tanks, such as sewage suction vehicles, fecal suction vehicles, and combined pressure washing sewage suction vehicles, are also becoming more and more popular.
Generally speaking, the normal service life of sewage suction trucks, fecal suction trucks, and high pressure washing cleaning sewage suction trucks should be more than 10 years, but in actual use, the car body is generally scrapped in about 8 years. The reason is that the tank body of the sewage suction truck and the manure suction truck is seriously corroded by the liquid medium loaded during the use process. It reduces the operating cost of sanitation operators and causes waste of resources. How to make the life of the tank reach the same life as the car body, improve the use efficiency of the sewage suction truck and the fecal suction truck, and reduce the operating cost of the sanitation enterprise is a problem that sewage suction truck manufacturers need to think about.
Corrosion environment and corrosion status of sewage suction vehicles and fecal suction vehicles.
1. Corrosive environment
Sewage suction truck The fecal suction truck is mainly used to collect and transport fecal mud, etc. The specific corrosion factors are analyzed as follows:
Sewage suction trucks and fecal suction trucks are mainly used to transport fecal mud, and the main components are the mixture of large and small urine excreted by the human body. Three-quarters of the defense is water, and the rest is mostly protein, inorganic matter, fat, undigested plant fiber, dehydrated digestive juice residue, cells shed from the intestinal tract and dead bacteria. Water in the urine accounts for 96%-97%, and the rest is urea, uric acid, sulfate, etc. The feces will corrode the tank body of sewage suction trucks, fecal suction trucks and cleaning sewage suction trucks seriously at night. The corrosion process is diverse, including the multiple effects of chemical corrosion, electrochemical corrosion and microbial corrosion.
2. Corrosion status
At present, the inner walls of domestic sewage suction trucks and fecal suction trucks do not have any anti-corrosion measures, and rely entirely on the anti-corrosion ability of the tank steel itself. The vehicle has been put into use for less than a year, and there are a lot of rust spots on the inner wall of the tank, and local rust is serious. For example, welding seams, depressions at the bottom, and corners of wave shields are the hardest hit areas for corrosion.
When the sewage suction truck and the fecal suction truck collect the fecal sewage, a great negative pressure is generated in the tank, and the use of the tank structure machine has higher requirements. The phenomenon of collapsed cans.
Based on the above situation, it is recommended that sewage suction truck manufacturers use anti-corrosion coating as standard equipment for sewage suction vehicles and fecal suction vehicles. At the same time, it is also recommended that consumers who purchase sewage suction vehicles and fecal suction vehicles should use the sewage suction vehicle as soon as possible after purchasing the car. And feces suction truck plus anti-corrosion coating, effectively prolong the service life of the vehicle.