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Dual-pump flow-equalizing flue sampling device and sampling method

A flue gas sampling and throttling device technology, applied in the direction of sampling devices, etc., can solve the problems of insufficient flue gas suction, and achieve the effect of ensuring accuracy and improving accuracy

Active Publication Date: 2014-03-26
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the above problems, the present invention provides a dual-pump uniform flow flue gas sampling device, which can realize uniform flue gas flow in each measurement hole, and can solve the problem of insufficient suction power of the single pump in the existing device, and realize accurate measurement

Method used

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  • Dual-pump flow-equalizing flue sampling device and sampling method

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Embodiment Construction

[0033] The present invention is described in detail below in conjunction with accompanying drawing:

[0034] image 3 It is a schematic diagram of the dual-pump equal-flow flue gas sampling device. The device consists of a flue gas sampling gun 1, a flue gas duct 2, a throttling device 3, a flue gas mixing tank 4, a flue gas outlet pipe 5, a filter 6, a front pump 7, a flue gas analyzer 8 and a main gas pump 9 .

[0035] The flue gas mixing tank 4 is provided with a flue gas sampling gun 1 and a flue gas outlet pipe 5 communicating with it. The outlet end of the flue gas outlet pipe 5 is connected with a main air pump 9, and a A branch connected to the flue gas analyzer 8; one end of the flue gas sampling gun 1 communicating with the flue gas mixing tank 4 is provided with a throttling device 3, and a filter 6 is provided on the flue gas outlet pipe 5 .

[0036] Flue gas sampling gun 1 such as Figure 4 As shown, along the direction from the head end 12 of the sampling gu...

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Abstract

The invention particularly discloses a dual-pump flow-equalizing flue sampling device and a sampling method. The dual-pump flow-equalizing flue sampling device comprises a flue mixing tank, wherein a flue sampling gun and a flue lead-out pipe are arranged on the flue mixing tank and communicated with the flue mixing tank; the outlet end of the flue lead-out pipe is connected with a pump I, and a branch connected with a flue analyzer is also led out from the flue lead-out pipe; one end, communicated with the flue mixing tank, of the flue sampling gun is provided with a throttling device, and a filter is also arranged on the flue lead-out pipe. With the adoption of the dual-pump flow-equalizing flue sampling device and the sampling method, the flue flow of each measurement hole in a single sampling gun is equalized, and the accuracy of flue oxygen measurement is improved.

Description

[0001] technical field [0002] The invention specifically discloses a double-pump uniform flow flue gas sampling device and a sampling method. Background technique [0003] During the thermal test of utility boilers, it is often necessary to measure the oxygen content of the flue gas. However, the cross-section of the tail flue of the boiler is large, the lateral mixing of the flue gas in the tail flue is poor, and the stratification phenomenon is serious, which leads to uneven distribution of the oxygen content of the flue gas on the flue cross section. Therefore, the national standard stipulates that the grid method is used to measure the oxygen content of flue gas. The grid method to measure the oxygen content of flue gas is as follows: figure 1 As shown, the flue gas taken by each sampling gun enters the flue gas mixing tank for mixing, and then is introduced into the flue gas analyzer by the pump for measurement. [0004] In the actual measurement, it is found that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24
Inventor 刘科段传俊侯凡军胡志宏郝卫东
Owner STATE GRID CORP OF CHINA
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