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Method for measuring content of acid mist in sulfuric acid production tail gas

A sulfuric acid production and determination method technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of high cost and low accuracy, and achieve the effect of high accuracy, low cost, and simple and easy-to-obtain equipment

Active Publication Date: 2021-06-22
河北冀衡集团有限公司
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Problems solved by technology

[0006] The object of the present invention is to provide a method for measuring acid mist content in sulfuric acid production tail gas, to solve the low accuracy of acid mist content measurement method in current sulfuric acid production tail gas, high cost problem

Method used

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  • Method for measuring content of acid mist in sulfuric acid production tail gas
  • Method for measuring content of acid mist in sulfuric acid production tail gas
  • Method for measuring content of acid mist in sulfuric acid production tail gas

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Embodiment 1

[0088] A method for measuring acid mist content in sulfuric acid production tail gas provided by the present embodiment comprises the following steps:

[0089] Step 1: Fill the absorption bottle with glass sand core (porous glass plate) into about 75ml, 0.1mol / L sodium hydroxide standard solution, connect the absorption bottle to the wet gas flow meter, and connect the absorption bottle to the sampling tube tightly at the same time. Connect the vacuum pump at the diameter of 1 / 3-1 / 2 of the gas inlet pipeline, let the pipeline gas pass through the sampling device such as the absorption bottle at a speed of 2.5L / min, and sample at a constant speed for 30 minutes.

[0090] Step 2, remove the absorption bottle, pour the absorption liquid in the absorption bottle into a 100ml volumetric flask, wash the absorption bottle with a small amount of water 2-3 times, each time the water does not exceed 10ml, put the washing liquid into the volumetric flask, and rinse with hydrochloric acid ...

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Abstract

The invention provides a method for measuring the content of acid mist in sulfuric acid production tail gas. The measurement method comprises the steps of sampling, preparing a sample, measuring, drawing a standard curve and calculating a result. By means of sampling at a constant speed, acid mist in sulfuric acid production tail gas is absorbed by using a dilute alkali solution, sulfate ions in a sample solution react with barium chloride under a neutral condition to generate white precipitate of barium sulfate and form turbid liquid, and a hydrochloric acid solution is added into the sample solution, so that the influence of barium sulfite white precipitate generated by sulfur dioxide and barium chloride in the tail gas on the result can be effectively eliminated, and then the absorbance is determined. The sulfate ion concentration and the absorbance have a good linear relationship within a certain range, and the content of sulfate radicals in a sample is determined by setting a standard curve and comparing the measured absorbance of a sample solution with the standard curve. The measurement method is simple and convenient, low in cost and high in accuracy, used equipment is simple and easy to obtain, and application of small and medium-sized chemical enterprises is facilitated.

Description

technical field [0001] The invention belongs to the technical field of sulfuric acid acid mist detection, and in particular relates to a method for measuring acid mist content in sulfuric acid production tail gas. Background technique [0002] During the sulfuric acid production process, the tail gas usually contains acid mist, and the main component of the acid mist is sulfuric acid droplets. For the detection of the acid mist content in the sulfuric acid production tail gas, there are two current technologies: barium chromate spectrophotometry and ion chromatography. [0003] The main problems of barium chromate spectrophotometry are: 1. The operation procedures of barium chromate spectrophotometry are cumbersome; 2. The method of sulfuric acid mist and barium chromate forming a series of yellow substances for color comparison, but there are many other elements For example, calcium, magnesium, zirconium and other ions react with chromate to generate yellow or orange subst...

Claims

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Application Information

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IPC IPC(8): G01N21/31
CPCG01N21/31
Inventor 卢金华郑丽宏伊根生张凯丽
Owner 河北冀衡集团有限公司
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