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Built-in mobile pollutant sampling device

A sampling device and pollutant technology, applied in the field of built-in mobile pollutant sampling device, can solve the problem of inability to accurately reflect the concentration distribution of flue gas components in the catalyst layer, the inability to judge the catalytic efficiency and wear of the catalyst module, and the flue gas sampling point Insufficient density and other issues to achieve the effect of increasing expansion flexibility, reducing impact, and reducing blocking area

Active Publication Date: 2019-07-30
ZHEJIANG HOPE ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the density of flue gas sampling points in the catalyst layer of the existing denitrification system is insufficient, which cannot accurately reflect the concentration distribution of flue gas components between the catalyst layers, let alone judge the catalytic efficiency and wear of each catalyst module. problem, to provide a built-in mobile pollutant sampling device with little influence on the flue gas flow field, high sampling efficiency and low maintenance cost

Method used

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  • Built-in mobile pollutant sampling device
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  • Built-in mobile pollutant sampling device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] exist figure 1 figure 2 In the shown embodiment 1, a built-in mobile pollutant sampling device includes an outer cylinder 1 and a plurality of sampling tubes 2 arranged at intervals along the axial direction of the outer wall of the outer cylinder. The sampling tubes are arranged on the same side of the outer cylinder, divided into front and rear Two groups, each group of sampling tubes are arranged at equal intervals (see image 3); the sampling tube communicates with the inner cavity of the outer cylinder, the inner cavity of the outer cylinder is provided with an inner cylinder 3 parallel to the outer cylinder, one inner cylinder is arranged on the central axis of the outer cylinder, and the front end of the inner cylinder is connected with Sliding sampling head 4, the sampling head includes a front sealing plate 5 and a rear sealing plate 6 which are arranged at intervals in the inner cavity of the outer cylinder and are slidably sealed with the inner wall of the ...

Embodiment 2

[0034] Between the front sealing plate and the rear sealing plate of embodiment 2, a partition 11 that slides and seals with the inner wall of the outer cylinder is provided along the axial direction of the outer cylinder (see Figure 4 ), the partition divides the sampling chamber into a left sampling chamber 12 and a right sampling chamber 13, grooves are provided on both sides of the partition near the outer cylinder, and sealing strips are provided in the grooves (not shown in the figure ), the left sampling chamber and the rear sealing plate of the right sampling chamber are provided with the air outlet holes, the inner cylinder is two, respectively connected with the air outlet holes on the left and right sides, the left sampling chamber and the right sampling chamber The above-mentioned support tubes are provided in the cavity, and the sampling tubes are symmetrically connected to the left and right sides of the outer cylinder corresponding to the left sampling cavity an...

Embodiment 3

[0036] The outer circumference of the inner cylinder of Example 3 is equipped with a heating belt (heating belt), and the rear end of the inner cylinder is provided with an extension interface. The extension pipe adopts a connection method of a flared internal thread at one end and an external thread at one end, and the rear end of the inner cylinder passes through the extension interface. Connect with the extension pipe, the inner cylinder and the outer peripheral surface of the extension pipe are provided with sampling marks, the outer cylinder in this embodiment is a square pipe, the inner cylinder and the sampling pipe are round pipes, and the cross-sectional area of ​​the inner cylinder is 15% of the cross-sectional area of ​​the outer cylinder, the cross-sectional area of ​​the sampling tube is 5% of the cross-sectional area of ​​the outer cylinder, and all the other are the same as in embodiment 1 or embodiment 2.

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Abstract

The invention discloses a built-in movable pollutant sampling apparatus, which comprises an outer cylinder and a plurality of sampling pipes axially arranged along the outer wall of the outer cylinderat intervals, wherein an inner cylinder and a sliding type sampling head are arranged in the inner cavity of the outer cylinder, a sampling cavity is formed between the front sealing plate and the rear sealing plate of the sampling head, the axial length of the sampling cavity is smaller than the distance between the two adjacent sampling pipe in the axial direction of the outer cylinder, the front end of the inner cylinder is connected to the rear sealing plate, and is communicated to a gas outlet hole arranged on the rear sealing plate, and the rear end of the inner cylinder extends out ofthe outer cylinder. In the prior art, the density of the flue gas sampling pipes at the denitrification system catalyst layer is insufficient, such that the flue gas pollutant concentration distribution condition between the catalyst layers cannot be accurately reflected. According to the present invention, the built-in movable pollutant sampling apparatus can effectively solve the problem in theprior art; and the built-in movable pollutant sampling apparatus has advantages of low influence on the flue gas flow field, high sampling efficiency, low maintenance cost, and high practical value.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring instruments and equipment, in particular to a built-in mobile pollutant sampling device. Background technique [0002] At present, the number of flue gas sampling tubes in the catalyst layer of the SCR denitrification system is small, and the density of sampling points is insufficient, which cannot accurately reflect the exact distribution of the concentration of flue gas components between each layer of catalysts, so that it is impossible to judge the impact of each layer of catalysts and modules on pollutants. The catalytic removal efficiency of the catalyst and the wear of the catalyst module. Although the number of sampling points can be increased by increasing the number of sampling tubes, the existing sampling method is often that one sampling tube corresponds to one sampling point. If the number of sampling points is increased to hundreds, the increased sampling tubes will ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/22
CPCG01N1/2205G01N1/2247G01N2001/2264
Inventor 翁卫国李钦武郑政杰孙建国金守泉赵健柳东海吴继海
Owner ZHEJIANG HOPE ENVIRONMENTAL PROTECTION ENG