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Carbon separation reactor and carbon separation method and treatment method of fly ash

A reactor and reaction technology, applied in the direction of silica, silicon oxide, etc., can solve problems such as the inability to apply carbon pipes to prevent and remove blockage, crystallization and sediment blockage of the outlet, and the blockage of the feeding outlet, etc., and the frequency is convenient Adjustable, improved product quality, and timely blockage removal

Active Publication Date: 2021-09-03
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] It can be seen that the above-mentioned technical scheme is mainly aimed at solving the problem of clogging of the solid material feeding outlet of the feeder, or the clogging of the outlet by crystallization and sediment at the bottom of the reactor, and cannot be applied to the prevention and removal of carbon pipes

Method used

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  • Carbon separation reactor and carbon separation method and treatment method of fly ash
  • Carbon separation reactor and carbon separation method and treatment method of fly ash

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Effect test

Embodiment approach

[0053] According to an embodiment of the present invention, the stirring device includes: a stirring motor, a stirring shaft and a stirring paddle, wherein, preferably, the stirring shaft communicates with the main body of the carbon reactor through the carbon dioxide inlet pipe, so The stirring motor is used to drive the stirring shaft to rotate.

[0054] According to the solution of the present invention, the stirring blade and the blockage removal scraper share the stirring shaft. In the specific use process, the minimum stirring speed can be set according to the mixing and stirring effect of the carbon slurry, for example, 30-150rpm. At the same time, according to the blockage of the carbon dioxide inlet pipe and the condition of the equipment, a large stirring speed can be used to clear the blockage. Namely, in the reactor of the present invention, at a low stirring speed, the silica solids adhered to the carbon dioxide inlet pipe due to the carbon reaction can be effect...

preparation Embodiment 1

[0091] A kind of high aluminum fly ash, the chemical composition is shown in Table 1.

[0092] Chemical composition analysis (percentage by weight) of table 1 high aluminum fly ash

[0093] SiO 2

[0094] According to the molar ratio of sodium hydroxide and silicon dioxide being 2.0, sodium hydroxide was weighed, and an alkali solution with a mass concentration of 10% was prepared. Mix with fly ash in Table 1, stir and react at 95°C for 60 minutes, and filter to obtain water glass.

preparation Embodiment 2

[0096] A high-aluminum fly ash residue from acid extraction of aluminum, the chemical composition of which is shown in Table 2.

[0097] Chemical composition analysis (weight percent) of the aluminum extraction residue of table 2 acid method

[0098] SiO 2

[0099] According to the molar ratio of sodium hydroxide and silicon dioxide being 1.3, measure sodium hydroxide, and prepare an alkali solution with a mass concentration of 30%. Mix it with the fly ash in Table 2, stir and react at 135°C for 60 minutes, cool and filter to obtain water glass.

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Abstract

The present invention relates to the field of carbon fractionation, and specifically provides a carbon fractionation reactor, comprising: a carbon dioxide gas inlet pipeline, a stirring device and a carbon fractionation reactor main body, the stirring device comprising: a stirring shaft and a stirring paddle, and the carbon dioxide gas inlet The pipeline communicates with the main body of the carbon reactor to provide a source of carbon dioxide; the stirring shaft passes through the carbon dioxide inlet pipe and extends into the interior of the main body of the carbon reactor; the stirring paddle drives the stirring shaft through the stirring shaft The carbon reaction in the carbon reactor is carried out under stirring conditions; a scraper is set on the stirring shaft for scraping. The invention provides a carbon separation method and a fly ash treatment method carried out by using the reactor of the invention. The self-clearing structure of the carbon reactor of the present invention is ingeniously designed and easy to implement; the stirring and the cleaning are synchronized, and the frequency of cleaning is convenient and adjustable; the cleaning is timely, without hysteresis, and the cleaning effect is good; , High product quality.

Description

technical field [0001] The invention relates to the field of carbon separation, in particular to a carbon separation reactor, a carbon separation method and a fly ash processing method. Background technique [0002] The main components of fly ash are alumina and silica, accounting for more than 80-90% of the total weight of fly ash. Extracting alumina from fly ash can alleviate the shortage of bauxite in my country, and is an important way for high-value utilization of fly ash. In order to improve the economy of extracting aluminum from fly ash and avoid the formation of new solid waste, it is necessary to study the extraction and utilization technology of silica in fly ash and aluminum extraction slag. [0003] CN101993087A proposes to leach acid-soluble impurities in fly ash with 20-38% hydrochloric acid at a temperature of 70-95°C, then dissolve them in alkali at a temperature of 130-200°C, dilute the eluate, filter and precipitate to obtain a sodium silicate solution. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12
CPCC01B33/12
Inventor 赵利军陈爱国孙永伟王晓欢刘汇东肖永丰龙银花
Owner CHNA ENERGY INVESTMENT CORP LTD
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