The invention discloses a sampling device for a continuous online detection
system of
flue gas emission, which is characterized in that the sampling device is composed of a sampling ash removing mechanism, a controller and a sampling pump. The sampling ash removing mechanism is used to collect sample gas and eliminate
powder dust in the gas, and is composed of a main body structure, a back-blowing controller, a back-blowing gas
pipe, a sweeping controller, a
flue gas sample outlet, a dust removing
filter element and a sweeping
actuator. The controller is composed of a frequency converter, a computer, a
flue gas flow speed sampling interface, a control output interface, a frequency converter output interface and a power supply wire interface, and the computer controls the sampling ash removing mechanism to sample and remove ash and simultaneously controls the sampling speed of the sampling pump in order to realize the sampling synchronization. The sampling pump is composed of a control wire interface, a fan, a
flue gas sample detecting inlet and a surplus sample gas outlet. The invention solves the problems of sampling blockage, synchronous sampling and negative pressure sampling, detects and samples the gas in the process of controlling production, and is also applied to detection and sampling for the
environmental protection of various gas.