Conical single-nozzle sampling system provided with two stages of shielding cases

A sampling system and shielding cover technology, applied in the field of conical single-nozzle sampling system, can solve the problems of unrepresentative sampling results, loss of airborne effluent pipeline, sampling distortion, etc., to achieve improved transmittance, high Transmittance, effect of reducing wall loss

Pending Publication Date: 2019-03-15
中国人民解放军军事科学院国防工程研究院工程防护研究所
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Problems solved by technology

At present, many sampling pipeline systems adopt multi-nozzle sampling, and the disadvantages of multi-nozzle sampling scheme are very obvious: ① Sampling in non-mixed uniform sampling area, the sampling results are not representative; There are many elbows and complex structures, which can easily cause the loss of airborne effluent pipelines, resulting in serious sampling distortion

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  • Conical single-nozzle sampling system provided with two stages of shielding cases
  • Conical single-nozzle sampling system provided with two stages of shielding cases
  • Conical single-nozzle sampling system provided with two stages of shielding cases

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Embodiment Construction

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0016] Such as figure 1 , figure 2 , image 3 , Figure 4 As shown, a conical single-nozzle sampling system with a secondary shield is characterized in that it includes a primary shield 1, the primary shield 1 is funnel-shaped, and the end of the funnel is provided with a solid connection The secondary shielding cover 2, the inner end of the secondary shielding cover 2 is fixedly connected with a nozzle 3, the end of the nozzle 3 is threadedly connected with a pipeline 4, and the end of the pipeline is threadedly connected with an external exhaust gas emission monitoring device 5; the secondary shielding cover 2 is a round pipe structure, and its connection with the nozzle 3 is a welded connection with three connection points 8 in equal parts, and an airflow channel 9 is arranged between the two; the nozzle is composed of a nozzle 6 and a pipe body 7 , t...

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Abstract

The invention relates to a conical single-nozzle sampling system provided with two stages of shielding cases. The conical single-nozzle sampling system is characterized by comprising a primary shielding case which is funnel-shaped, wherein a secondary shielding case fixedly connected into a whole is arranged at the tail end of the funnel, the internal tail end of the secondary shielding case is fixedly connected with a nozzle, the tail end of the nozzle is connected with a pipe, and the tail end of the pipe is connected with an external waste gas exhaust monitoring device; the secondary shielding case is of a round pipe structure and is in equal-diversion-point contact connection with the nozzle, and an airflow channel is formed between the secondary shielding case and the nozzle; the nozzle comprises an orifice and a pipe body, and the orifice is of a pipy cone frustum structure. The conical single-nozzle sampling system has the following beneficial effects: the overall structure is simple, sampling can be performed in a uniform mixing zone of airborne effluent, and a sampling result is more accurate and more effective than that obtained by a multi-nozzle sampling system.

Description

technical field [0001] The invention relates to the collection and monitoring of pollution sources in the exhaust gas discharge process, in particular to a conical single-nozzle sampling system with a secondary shielding cover. Background technique [0002] In order to determine whether various pollution sources in industrial exhaust gas meet the emission limit requirements, it is usually necessary to continuously sample and monitor the airborne effluent in the chimney or exhaust pipe. At present, many sampling pipeline systems use multi-nozzle sampling, and the disadvantages of multi-nozzle sampling scheme are very obvious: ① Sampling in non-mixed uniform sampling area, the sampling results are not representative; There are many elbows and complex structures, which can easily cause the loss of airborne effluent pipelines, resulting in serious sampling distortion. Therefore, it is necessary to design a sampling system with simple structure and high efficiency to solve this ...

Claims

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Application Information

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IPC IPC(8): G01N1/24
CPCG01N1/2202G01N1/24
Inventor 张坤曹兴伟何泽银郑力吴中坚马新宝许行宾刘慧开王励自
Owner 中国人民解放军军事科学院国防工程研究院工程防护研究所
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