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A low-concentration particle sampling and detection device and a particle sampling head of the device

A technology of sampling head and particulate matter, which is applied in the direction of sampling device, material absorption and weighing, etc., can solve the problems of complicated sampling operation, high detection limit and low accuracy, and achieve simplified operation process, lower detection limit, and easy operation easy effect

Inactive Publication Date: 2019-03-19
BEIJING MUNICIPAL ENVIRONMENTAL MONITORING CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Aspects of the present invention are to provide a low-concentration particle sampling and detection device and a particle sampling head of the device to solve the problems of complicated sampling operation, low accuracy and high detection limit in the detection of particle mass concentration

Method used

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Embodiment Construction

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0026] Such as figure 2 As shown, it is a schematic structural diagram of a particulate matter sampling and detecting device disclosed in an embodiment of the present invention. The particulate matter sampling and detecting device in this embodiment is a new sampling device for testing particulate matter in exhaust gas from a fixed source. The pa...

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Abstract

The invention discloses a low-concentration particulate matter sampling detection device and a particulate matter sampling head of the device. The upper half part of the particulate matter sampling head is a double-layer sampling head, and the lower half part of the particulate matter sampling head comprises a stainless steel membrane support and a sampling gun connector; the inner layer of the double-layer sampling head is an integral sleeving sampling filtering element and comprises a sampling tube, a conical shell, a filter membrane and a protection net, and the outer layer of the double-layer sampling head comprises a sampling head sheath and a sampling nozzle; the integral sleeving sampling filtering element is arranged in the sampling head sheath, and connected with the sampling nozzle at the most front end through the sampling tube, the rear end is provided with the inverted conical shell, the filter membrane and the protection net are positioned at the opening position of the conical shell, the integral sleeving sampling filtering element is in sealing connection with the sampling head sheath by screw threads, the upper half part and the lower half part of the particulate matter sampling head press the filter membrane and the protection net on the stainless steel membrane support by utilizing O-shaped screw thread glands, and finally the particulate matter sampling head is connected with the sampling gun connector. With the particulate matter sampling detection device and the particulate matter sampling head, the problems in the mass concentration detection of the particulate matters that the sampling operation is complicated, and the accuracy is low and the detection limit is high are solved.

Description

technical field [0001] The invention relates to the technical field of atmospheric / exhaust gas monitoring, in particular to a low-concentration particle sampling and detection device and a particle sampling head of the device. Background technique [0002] Particulate matter or dust (Particulate Matter, Dust) refers to the solid and liquid particulate matter suspended in the exhaust gas produced during the combustion, synthesis, decomposition, and mechanical processing of fuel and other substances. Most of the fine particulate matter in cities comes from man-made pollution such as combustion and industrial production. Especially the inhalable particulate matter, especially the particle size less than 2.5 μm (PM 2.5 ) can directly reach the human lungs and enter the alveoli, and may enter the blood to the whole body. Fine particles enrich a large amount of toxic heavy metals and harmful organic substances, and adhere to bacteria and viruses. Inhalable particles 10μm (PM 10 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/22G01N5/02
Inventor 石爱军张大伟梁云平刘保献胡月琪王小菊马召辉
Owner BEIJING MUNICIPAL ENVIRONMENTAL MONITORING CENT
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