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Method and system for monitoring elements in gaseous fluid

A gaseous fluid and monitoring system technology, applied in measuring devices, color/spectral characteristic measurement, instruments, etc., can solve the problems of difficult long-term storage of membranes and high loss of iodine, etc., achieve fast processing time and save troublesome storage

Active Publication Date: 2012-10-03
FOCUSED PHOTONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that the longer the filter membrane is placed, the more iodine will be lost. Therefore, it is difficult to store the treated membrane for a long time.

Method used

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  • Method and system for monitoring elements in gaseous fluid
  • Method and system for monitoring elements in gaseous fluid
  • Method and system for monitoring elements in gaseous fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 As shown, a monitoring system for elements in gaseous fluids is used to monitor the contents of mercury, cadmium, arsenic and other elements in the chimney. The monitoring system includes: a sampling unit, a heat tracing unit, a filter membrane and a delivery unit, an iodine solution application unit, a detection unit, and a control unit.

[0044] The sampling unit is installed on the chimney to be tested, and the sampled gaseous fluid is transported through the pipeline 31, and the pipeline is provided with a heat tracing unit for maintaining the state of the gaseous fluid in the pipeline in the chimney.

[0045] The conveying unit includes a driving wheel 13 and a driven wheel 11 , the untreated filter membrane 12 is wound on the driven wheel 11 , and the measured filter membrane is wound on the driving wheel 13 . Use ordinary filter membranes, such as PES membranes.

[0046] The first element solution application unit 21 is a liquid spraying device...

Embodiment 2

[0056] Such as figure 2 Shown, the monitoring system of element in a kind of gaseous fluid, is used for measuring the content of mercury in the chimney, and embodiment 1 difference is:

[0057] 1. If image 3 As shown, the first element solution application unit 22 is a sealed container containing iodine solution, and the solvent is n-pentane. The filter membrane 12 moves between the supporting rollers 221, 222, 223, and passes through the iodine solution in the container to keep hermetically sealed with the container, so as to prevent the solution in the container from volatilizing and being discharged from the container.

[0058] 2. The detection unit is a cold vapor atomic absorption spectrometer.

[0059] This embodiment also discloses a method for monitoring elements in a gaseous fluid, which is used to monitor the content of mercury in the chimney. The difference from Embodiment 1 is:

[0060] 1. The filter membrane passes through the iodine solution in the container...

Embodiment 3

[0064] A monitoring system for elements in a gaseous fluid is used to measure the content of mercury in the chimney, and the difference from Example 2 is:

[0065] 1. The first element solution applying unit 22 contains a sulfur solution, and the solvent is carbon disulfide.

[0066] 2. If Figure 4 As shown, the idler 222 is connected to the control unit, and moves up and down under the action of the control unit, so that when the sulfur solution needs to be applied, the idler 222 moves downward and enters the sulfur solution with the filter membrane 12, and when the sulfur solution does not need to be applied , the idler roller 222 moves upwards to take the filter membrane 12 away from the sulfur solution.

[0067] 3. The detection unit adopts an X-ray fluorescence spectrometer analysis device, which is the same as that in Embodiment 1.

[0068] This embodiment also discloses a method for monitoring elements in a gaseous fluid, which is used to monitor the content of mercu...

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Abstract

The invention relates to a method for monitoring elements in gaseous fluid. The method comprises the following steps: (a) the step of adding a first element solution, adding the first element solution on a filter membrane in the measurement field, wherein the solvent of the first element solution on the filter membrane volatilizes to leave at least one part of the first element; (b) the step of sampling: carrying out a reaction on a second element in the gaseous fluid and the first element on the filter membrane in the sampling area, wherein the reactants generated by the reaction are adsorbed on the filter membrane; and (c) the step of detecting: detecting the reactants on the filter membrane to determine the content of the second element in the gaseous fluid in a detecting area. The invention also provides a system for implementing the method.

Description

technical field [0001] The invention relates to the monitoring of elements, in particular to a method and system for monitoring elements in gaseous fluids. Background technique [0002] Mercury is a highly toxic substance. Even if the mercury content in the environment is very low, it will accumulate into the human body through the food chain, thereby endangering human health. Therefore, there is an urgent need for methods that can rapidly and quantitatively detect trace amounts of mercury in the environment. [0003] Mercury is volatile and remains in the gaseous state in many occasions, such as in chimneys and pipes, and its content is relatively low. Therefore, it is necessary to use a filter membrane to enrich mercury to improve the sensitivity of mercury measurement. Ordinary filter membranes cannot enrich elemental mercury, so special treatment of mercury or filter membranes is required. The current processing methods mainly include the following two types: [0004]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/223G01N21/31G01N1/22
Inventor 叶华俊郭生良韩双来
Owner FOCUSED PHOTONICS