Sampling system meeting full-system calibration requirements

Abstract

The invention discloses a sampling system meeting full- system calibration requirements. The sampling system comprises a gun body and a handle arranged on the rear side of the gun body; the gun body is of a cylindrical structure; the handle is fixedly connected to the rear side of the gun body through a connecting plate at the front end of the handle; the connecting plate and the gun body are connected in a clamped mode through a buckle structure; a stepping motor is fixedly installed on the upper side wall of the gun body through a hoop structure; a transmission gear is fixedly installed on arotor of the stepping motor; three rotating shaft bases are integrally formed at the position, located at the front side end of the stepping motor, of the upper side wall of the gun body, and the rotating shaft bases are distributed at equal intervals. The gun body is arranged; two heat tracing pipelines are arranged in the handle at the tail end of the gun body; the normal flue gas sampling pipeline and the calibration gas pipeline in the two heat tracing pipelines are connected with a gas valve and a gas pump respectively, so that the device can calibrate flue gas before sampling the flue gas; and therefore, the detection accuracy of the device is prevented from being influenced by residual gas in the device.

Description

technical field [0001] The invention relates to the related technical field of sampling guns, in particular to a sampling system meeting the calibration requirements of the whole system. Background technique [0002] With the improvement of people's awareness of environmental protection, online automatic monitoring equipment will be installed at the pollution source of unit sewage and waste gas for detection, and the automatic monitoring equipment will be calibrated according to the specified time limit. The calibration of the whole system requires that the calibration gas be introduced from the station equipment and sent through a pipeline. Go to the high-altitude sampling platform to sample the pipe, and then the calibration gas is passed into the analytical instrument through the sampling pipeline. Because the front end of the sampling pipe is in the high-altitude discharge tube, it cannot be sealed, and most of the calibration gas escapes from the sampling gun mouth, and...

AI Technical Summary

Problems solved by technology

Because the front end of the sampling pipe is in the high-altitude discharge tube, it cannot be sealed, and most of the calibration gas escapes from the sampling gun mouth, and only part of the standard gas can enter the analytical instrument through the normal sampling pipeline, which often leads to a long T90 response time of the equipment. Much longer than required by technical specifications

Some equipment manufacturers connect a three-way solenoid valve at the interface between the sampling end and the bong, and close the bong inlet during calibration, so that the standard gas can quickly pass through the normal sampling pipeline for analysis equipment, so that the response time of the equipment meets the requirements, but this This method does not fully meet the requirements of the HJ75 technical specification

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