The additives in leaded gasoline are such that they contaminate the catalyst. Lead in leaded gasoline can also contaminate the catalyst. It will cover the entire surface of the catalyst and prevent the catalytic reaction, so unleaded gasoline must be used. In order to reduce the resistance, the three-way purifier is designed to be oval or cylindrical. The metal shell, ceramic carrier and thermal expansion pad are assembled together for welding. The main function of the package is to hold the catalyst carrier still in the event of vibration of the exhaust system and gas pressure.
a. Half-shell purifier. The metal shell is welded by two oval half shells, a catalyst carrier and a gasket.
b. Reel purifier. The metal shell is welded from a metal plate, a catalyst carrier and a gasket.
The main process flow of the upper and lower shells is trimming-drawing-secondary drawing-flanging and forming-trimming. The temperature at which the exhaust gas conversion rate reaches 50% is called the activation temperature, which is generally around 200-250°C. In order to reach the start-up temperature as soon as possible after the cold start, it must be ensured that the exhaust gas minimizes heat loss during its entry into the purifier. The down pipe connecting the engine exhaust manifold and the purifier adopts double-pipe air isolation, which can reduce heat dissipation and accelerate start-up. Bent down pipe can be filled with sand or water frozen method.
According to the displacement, it can be designed as a single-flow exhaust system or a dual-flow exhaust system. The main factors affecting the life of the purifier: a. Precious metals such as lead, magnesium and other elements poisoning catalysts. b. Overheated. This is caused by the sintering of the active layer composition at high temperatures above 800-1000°C. The ideal temperature is 400-800°C. c. Mechanical damage. This is caused by the cracking of the shell caused by metal fatigue and the shattering of the ceramic carrier. d. Particles block the exhaust passage.
We have modernized workshops in accordance with GMP standards of Tetanus Antitoxin injection products with a production capacity of 60 million ampoules per year. And the production line equipped with a series of advanced pharmaceutical equipment: vertical ultrasonic bottle washing machine, hot air circulation tunnel sterilization oven, vertical filling and sealing machine(made in Germany), screw air compressor (made in Germany) and so on. The use of advanced protein digestion, separation, purification, filling preparation process, product quality has been fully guaranteed.
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