Gas purifier

The utility model provides a gas purifier, wherein, a gas inlet tube is arranged at a front end of a machine body, a separated grid and a filter screen are fixed in the center of the machine body, an induced draft fan and a gas exhausting tube are arranged at a back of the machine body. When the utility model is used, gas enters into the machine body through the gas inlet tube and forms a flow, a direction of the flow is changed via a baffle and the separated grid; meanwhile, waste gas particles are retained in the flow, and particles are separated from the flow. The utility model has small filtration resistance; the resistance is decreased by 2.5 times; wind resistance is smaller than 500 Pa; the oil mist purification efficiency is more than 90 percent; the harmful gas removal rate is more than 85 percent; and a plurality of waste gases of different situations can be separated. The utility model has the advantages of wide application scope, standardized filter elements, convenient equipment maintenance, low cost, long service life, reliable operation and no secondary pollution. The exhausted gas after detection and purification accords with all the index requirements of 'Emission Standard of Cooking Fume' GWPB5-2000.