Flue gas sampling gun

Abstract

The invention discloses a flue gas sampling gun and belongs to the technical field of flue gas detection, the flue gas sampling gun comprises a gas sampling head, a filter cabin and an exhaust cabin which are sequentially arranged from the front end to the rear end, the gas sampling head is provided with a gas inlet and a gas inlet pipeline, a filter passage communicated with the gas inlet pipeline is arranged in the filter cabin, a filter element is arranged in the filter passage, and the exhaust cabin is provided with the gas inlet pipeline. The front end of the air inlet pipeline is connected with the filtering channel, the rear end of the air inlet pipeline is used for being connected with a detector, and a dust filter is communicated between the air inlet and the air inlet pipeline. Flue gas is firstly filtered by the dust filter after entering the gas inlet, dust in the flue gas is removed, then the flue gas enters the filter element to be filtered for the second time, liquid such as water is removed, and after the flue gas is filtered twice, it can be guaranteed that gas subsequently discharged into the detector is clean air; therefore, the detector can measure the gas concentration in the high-temperature flue gas more quickly and efficiently, and the influence of dust and liquid on the detection precision of the detector is reduced.

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