Nitrogen oxides in the exhaust gas of diesel generator set are gases formed by the oxidation of nitrogen in the cylinder at high temperature, mainly composed of nitric oxide and nitrogen dioxide. Green Valley environmental protection aims at the treatment equipment of PM (particulate matter) and NOx (nitrogen oxide) in the exhaust gas of diesel generator set. Green Valley company has developed the integrated design of particle trap and SCR denitration system. The particle trap is used to treat the PM (particulate matter) in the waste gas to make it meet the environmental protection standard; SCR denitration system aims at NOx (nitrogen oxide) in waste gas to make it meet local environmental protection standards (specific standards are customized according to customer requirements).