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Process for continuously and rapidly determining components in desulfurization gypsum

A desulfurization gypsum, rapid determination technology, applied in the field of chemical detection, can solve the problems of analysis error, high sampling frequency, complicated operation process, etc., and achieve the effect of reducing operation intensity, reducing analysis error, and high sampling representativeness

Active Publication Date: 2012-01-25
HUADIAN ELECTRIC POWER SCI INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the current domestic determination methods for calcium carbonate, calcium sulfite and calcium sulfate in desulfurized gypsum can accurately determine the content of calcium carbonate, calcium sulfite and calcium sulfate in desulfurized gypsum, there are four main problems: 1. The determination of each component needs to be sampled separately and measured one by one, so the operation process is cumbersome, time-consuming and laborious; 2. The consumption of chemicals is large, which increases the cost of analysis, and the amount of chemical wastewater generated during the analysis process is large, which is not conducive to the conservation of water resources and environmental protection ; 3, the sampling frequency is high, and it is easy to cause measurement errors due to uneven sampling, so it is necessary to carry out multiple parallel experiments to solve this problem, thereby increasing the operational strength of analysts; 4, the measurement results of the above three components are not very relevant. easy to cause analysis error

Method used

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  • Process for continuously and rapidly determining components in desulfurization gypsum
  • Process for continuously and rapidly determining components in desulfurization gypsum
  • Process for continuously and rapidly determining components in desulfurization gypsum

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Put the desulfurized gypsum sample (referred to as 1#) taken from the M power plant into an oven, bake at 45°C for 4 hours, and place the dried sample in a mortar to grind and mix well. Weigh 1.0g (accurate to 0.0001g) of the dried sample, put it into a 250mL conical flask, dissolve and dilute it with 100mL desalted water, add 30mL0.1mol / L hydrochloric acid standard solution, 10ml0.05mol / L iodine standard solution, Shake well, place in dark place for 5min, titrate with 0.1mol / L sodium thiosulfate standard solution to light yellow, add 3-5 drops of starch indicator, continue to titrate with 0.1mol / L sodium thiosulfate standard solution to blue The end point is when the color just fades away, and the volume of sodium thiosulfate standard solution consumed is recorded, and a blank test is carried out at the same time. Place the solution after the determination of calcium sulfite on a magnetic stirrer and stir for 10 minutes, add 5-8 drops of phenolphthalein indicator, and ...

Embodiment 2

[0039]Put the desulfurized gypsum sample (denoted as 2#) taken from the P power plant into an oven, bake at 45°C for 4 hours, and place the obtained dried sample in a mortar to grind and mix well. Weigh 1.5g (accurate to 0.0001g) dried sample, put it into a 250mL conical flask, dissolve and dilute it with 100mL desalted water, add 40mL0.1mol / L hydrochloric acid standard solution, 10ml0.05mol / L iodine standard solution, Shake well, place in dark place for 5min, titrate with 0.1mol / L sodium thiosulfate standard solution to light yellow, add 3-5 drops of starch indicator, continue to titrate with 0.1mol / L sodium thiosulfate standard solution to blue The end point is when the color just fades away, and the volume of sodium thiosulfate standard solution consumed is recorded, and a blank test is carried out at the same time. Place the solution after the determination of calcium sulfite on a magnetic stirrer and stir for 10 minutes, add 5-8 drops of phenolphthalein indicator, and tit...

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Abstract

The invention which relates to a process or continuously and rapidly determining components in desulfurization gypsum belongs to the field of chemical detection. The process adopts iodometry, a back titration method with sodium hydroxide and a gravimetric method with barium sulfate in sequence to determine. The process of the invention has the advantages of reasonable design of test steps, easy and laborsaving operation, low cost, less pollution, high accuracy and less test workload.

Description

technical field [0001] The invention relates to a method for continuously and rapidly determining components of desulfurized gypsum, which belongs to the field of chemical detection. Background technique [0002] Limestone-gypsum wet flue gas desulfurization process is widely used because of its mature technology, high desulfurization efficiency, abundant sources of absorbent, low price, and availability of by-products. It has become the most widely used method for flue gas desulfurization in coal-fired power plants. In this method, limestone, which is cheap and widely sourced, is used as a desulfurization absorbent. By spraying a certain concentration of limestone slurry into the absorption tower, the flue gas and the slurry are countercurrently contacted, fully mixed, and the flue gas is washed to make the flue gas A series of complex chemical reactions take place between the sulfur dioxide in the slurry and the active ingredient calcium carbonate in the slurry and the oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16G01N5/04G01N21/78
Inventor 朱跃杨用龙高正来许昌日柴磊
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD
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