Method for measuring content of calcium hydroxide in flue gas desulfurizer

A technology of calcium hydroxide and determination method, applied in the field of chemical analysis, can solve problems such as inaccurate detection results, achieve the effects of accurate measurement, small error, and solve the detection accuracy

Pending Publication Date: 2021-09-17
QINGTONGXIA ALUMINUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of assay method of calcium hydroxide content in the flue gas desulfurizer, adopt X-ray diffraction method, because calcium oxide and calcium hydroxide diffraction pattern 2θ angles are completely different, calcium oxide or calcium hydroxide can be distinguished, can Quickly and effectively solve the problem of inaccurate detection results in the above measurement and calculation methods

Method used

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  • Method for measuring content of calcium hydroxide in flue gas desulfurizer
  • Method for measuring content of calcium hydroxide in flue gas desulfurizer
  • Method for measuring content of calcium hydroxide in flue gas desulfurizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Step S101: Sampling of samples to be tested:

[0041] Sampling 2 times respectively from the incoming flue gas desulfurizer as the sample 1# to be tested and the sample 2# to be tested.

[0042] Step S103: Preparation of samples to be tested:

[0043] Scrub the agate mortar with a cotton ball of absolute ethanol and dry it;

[0044] In the agate mortar, grind the sample to be tested 1# and the sample to be tested 2# in the agate mortar to a particle size of less than 10 μm;

[0045] The above ground test sample 1# and test sample 2# were pressed into tablets respectively.

[0046] Step S105: Measure the integral intensity of the sample to be tested:

[0047] Adjust the X-ray diffractometer to make it reach the stable state required for measurement;

[0048] Under the same diffraction conditions as the determination of the standard sample calcium hydroxide phase integral intensity, measure the integral intensity of the calcium hydroxide phase of the test sample 1# and ...

Embodiment 2

[0055] Step S101: Sampling of samples to be tested:

[0056] Quickly extract 2 samples of the mixture produced by the desulfurization reaction at the production site as the test sample 3# and the test sample 4#.

[0057] Step S103: Preparation of samples to be tested:

[0058] Scrub the agate mortar with a cotton ball of absolute ethanol and dry it;

[0059] Grind the sample to be tested 3# and the sample to be tested 4# respectively in an agate mortar until the particle size is less than 10 μm;

[0060] The above-mentioned ground samples to be tested are respectively pressed into tablets;

[0061] Step S105: Measure the integral intensity of the sample to be tested:

[0062] Adjust the X-ray diffractometer to make it reach the stable state required for measurement;

[0063] Under the same diffraction conditions as the determination of the standard sample calcium hydroxide phase integral intensity, measure the integral intensity of the calcium hydroxide phase of the test s...

Embodiment 3

[0070] figure 2 A schematic flow chart of a standard sample calibration curve drawing method provided in the embodiment of the present invention; figure 2 As shown, the method includes steps S301-S307:

[0071] Step S301: Sampling of standard samples and reference materials. The reference materials in this embodiment are reference calcium carbonate and reference calcium hydroxide.

[0072] Step S302: standard sample reference material drying:

[0073] Put the reference calcium carbonate and reference calcium hydroxide in weighing dishes respectively, put them in an oven and dry them at 105°C for about 1 hour, take them out and place them in a desiccator to cool naturally to room temperature.

[0074] It should be noted that the above-mentioned drying temperature of 105° C. and drying time of 1 hour are only set for the purpose of drying in this embodiment, including but not limited to the above-mentioned set values.

[0075] Step S303: Sample preparation of standard sampl...

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Abstract

The invention provides a method for determining the content of calcium hydroxide in a flue gas desulfurizer. The method comprises the following steps: adopting an X-ray diffraction method; under the same diffraction condition, respectively determining the integral intensity of a calcium hydroxide phase in a standard sample and the integral intensity of a calcium hydroxide phase in a to-be-tested flue gas desulfurizer sample, and drawing a working curve of the integral intensity of the calcium hydroxide in the standard sample; and according to the determined integral intensity of the to-be-tested sample, finding out the content of calcium hydroxide in the to-be-tested sample from the working curve of the integral intensity of the calcium hydroxide in the standard sample, and calculating to obtain the content of the calcium hydroxide in the to-be-tested sample, so that a judgment basis is provided for the quality and efficient utilization of the flue gas desulfurizer, and the measurement of the calcium hydroxide content in the flue gas desulfurizer is more accurate.

Description

technical field [0001] The invention relates to the technical field of chemical analysis, in particular to a method for determining the content of calcium hydroxide in a flue gas desulfurizer. Background technique [0002] In the prior art, a semi-dry desulfurization flue gas desulfurization system is adopted, and calcium hydroxide flue gas desulfurization agent is put into the desulfurization system to react with the flue gas in the desulfurization tower to eliminate sulfur dioxide in the flue gas. In order to ensure the desulfurization effect, the content of calcium hydroxide in the desulfurizer should be about 85%, and the actual result is that the content of active calcium should not be lower than about 85%. Since the sulfur dioxide content in the flue gas is a fluctuating data, some calcium hydroxide will not participate in the reaction during the desulfurization reaction, and will be mixed with the reaction products calcium sulfate and calcium sulfite to form desulfuri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/20G01N23/20008
CPCG01N23/20G01N23/20008
Inventor 李波王彪张姣
Owner QINGTONGXIA ALUMINUM GRP
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