Calibration method and device of dust concentration meter

Abstract

The invention relates to a calibration device of a dust concentration meter. The calibration device comprises a pipeline provided with the dust concentration meter, a calibration vehicle and a standard dusty gas pipeline between the pipeline and the calibration vehicle, wherein the pipeline is arranged in an exhaust funnel or outside the exhaust funnel, the pipeline is connected with a gas collecting hood and the standard dusty gas pipeline through a tee joint, the calibration vehicle comprises a motor vehicle, the motor vehicle is provided with a standard dusty gas preparation box, and an airinlet pipe and an air outlet pipe of the standard dusty gas preparation box, the air inlet pipe is provided with an air filter, an air heater and an inlet valve, and the air outlet pipe is provided with an outlet valve, a fan and a flow meter. The invention further s calibration method of the dust concentration meter. According to the calibration method, the dust concentration meter is directly calibrated on site by adopting the calibration vehicle, and the dust concentration meter does not need to be disassembled and assembled from beginning to end, so that the actual working condition of the dust concentration meter can be simulated, the calibration method is quick, and the calibration precision can reach over 95%, the workload of the existing manual sampling calibration method or laboratory calibration method is greatly reduced, and the damage of the laboratory calibration method to the dust concentration meter is avoided.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a calibration method and device for a dust concentration meter. Background technique [0002] The dust concentration meter is one of the important monitoring equipment for industrial dust pollution control facilities, and also one of the basic equipment for obtaining dust pollution data in the atmospheric environment, so the requirements for its accuracy are self-evident. [0003] At present, the online monitoring method for the dust emission concentration of industrial dust pollution control facilities is to install a dust concentration meter on the exhaust pipe to continuously measure the dust concentration data. There are two methods of measuring the dust concentration meter commonly used, the light scattering method and the charge method, and no matter which method, the measurement error is relatively large. According to the national standard "Technical requirements a...

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Problems solved by technology

At present, there are two methods of manual sampling calibration and laboratory calibration for dust concentration meter calibration: manual sampling calibration method has a long sampling time, which conflicts with the instantaneous sampling of dust concentration meter, so the accuracy of calibration is insufficient, and the calibration work The laboratory calibration method needs to remove the dust concentration meter on site, and then send it to the laboratory for calibration. The calibration time is long, and the frequent disassembly and assembly of the dust concentration meter also has a great impact on its performance.

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