Flue gas desulphurization pressure transmitter on-line verification method, and verification and blockage eliminating device

The invention provides a flue gas desulphurization pressure transmitter on-line verification and blockage eliminating device, at least comprising a first ball valve, a second ball valve, and a first flange provided with a pressure transducer diaphragm. The first ball valve is in connection with the pressure leading-out terminal of a detection pressure measuring pipe; the first ball valve and the second ball valve are in connection through a stainless steel connecting pipe; the first flange is in connection with the central section of the stainless steel connecting pipe; the sidewall of the stainless steel connecting pipe is provided with an air inflation hole in connection with a belt air pump calibration instrument; the port of the air inflation hole is provided with a sealing member. The invention also provides a flue gas desulphurization pressure transmitter on-line verification method. The flue gas desulphurization pressure transmitter on-line verification and blockage eliminating device can complete pres