The first half of 2016, in the Environmental Protection Department, "12369" environmental protection hotline received masses reported cases, the number of atmospheric pollution cases took the first place. Among them, the air pollution problem petrochemical, pharmaceutical, pesticide and other chemical industries are the most involved, particularly in the chemical industry gather industrial zone, its air pollution nuisance problems is particular standing out. So, the controlling of air pollution has another serious problem to solve, the chemical air pollution.

 

Not long ago, a state-owned energy giant was broke the news out of occurring pollution incident continually for many years, and its waste gas and water treatment are in the state of serious violations, resulting in the environment suffered a serious contamination. For this reason, there were five environmental groups have pointed to the existence of the company of industrial waste water, waste gas, waste pollution and other issues through the approach of mail, which has once attracted widespread media attention. What is the more hateful is that, for saving the cost, the company unauthorized stop running the desulphurization equipment, the time of annual outage desulphurization facilities for more than six months, causing serious long-term of excessive emissions of sulfur dioxide. For the reason, the company has paid the painful price of 37.24 million EMB ticket.

 

The removal problem of nitrogen oxides, sulfur oxides is one of the keys to the Chemical control of air pollution. Currently, SCR system is the fastest development with the most stable operation, and the most efficient denitration technology. While, the denitration catalyst is the core of the SCR system, in which, tungsten trioxide is typically added as the active additive, to improve the denitration activity. In addition, the diesel catalytic cracking process, the serious environmental pollution as increasing of combustion exhaust toxic gases (such as SOx) will be brought out; therefore, tungsten trioxide is also often used in hydrodesulfurization catalyst, and becoming an important active ingredient, play the role of anti-sulfur poisoning ect., and playing an indispensable influence in deep desulfurization of diesel, gasoline, etc..