Denitration tail gas online monitoring ammonia removal device and method

The invention provides a denitration tail gas online monitoring ammonia removal device and method. The device comprises a sampling pipe used for conveying process tail gas of ammonia process denitration equipment, and an acid adding pipe used for conveying phosphoric acid; the sampling pipe and the acid adding pipe are converged to a mixing pipe; the mixing pipe communicates with a mixing tank; and the mixing tank is provided with a liquid outlet and a gas outlet which can be connected to an analytical instrument. When in use, the process tail gas of the ammonia process denitration equipment is mixed with a phosphoric acid solution, ammonia salt and condensate water generated by a mixing reaction are discharged, and residual gas is sent to an analytical instrument. The ammonia gas in the process tail gas of the ammonia-process denitration equipment is removed by injecting the acid liquor, so that the measurement accuracy can be improved. 本发明提供一种脱硝尾气在线监测除氨装置与方法，包括用于输送氨法脱硝设备工艺尾气的采样管以及用于输送磷酸的加酸管，采样管与加酸管汇合至混合管，混合