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Coal-based radioactive sewage treatment agent, preparation method and application thereof

A sewage treatment agent and radioactive technology, which can be used in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of large amount of sludge, secondary pollution, and complex chemical composition.

Active Publication Date: 2019-05-24
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing sewage treatment agents not only have problems such as complex chemical components, slow settling speed, high cost, and unsuitability for bulk water treatment, but also have a large amount of sludge, difficult follow-up treatment, and the possibility of secondary pollution

Method used

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preparation example Construction

[0022] The invention provides a method for preparing a coal-based radioactive sewage treatment agent, comprising the following steps:

[0023] A) pulverizing the raw coal and adding it into water to make a coal slurry;

[0024] B) under stirring conditions, adding a chlorinating agent into the coal slurry, continuing to stir, and carrying out chlorination to obtain a coal-based radioactive sewage treatment agent;

[0025] The speed of stirring in the step B) is 50 to 900 rpm;

[0026] The time of chlorination in the step B) is 120~600min;

[0027] The chlorination temperature in the step B) is 20-60°C.

[0028] In the present invention, the raw coal is preferably pulverized first, and then the pulverized raw coal is added into water for stirring to obtain the coal slurry.

[0029] In the present invention, the volatile content in the raw coal is preferably greater than 15%, more preferably greater than 25%. Specifically, it may be weathered coal and / or lignite. The crushin...

Embodiment 1

[0054] 100g of lignite with a volatilization of 25.1% is crushed to the acceptable range of the ball mill, and then added to the ball mill for pulverization.

[0055] Add 300g of water to coal powder to make the water-to-coal ratio 3 to make coal slurry.

[0056] Under the state of stirring at 450 rpm, continuously add liquid chlorine to the coal slurry for 240 minutes, a total of 15.0 g. After the liquid chlorine was added, stirring was continued for 60 minutes.

[0057] After the chlorination is completed, solid-liquid separation is carried out, and deionized water is added until the pH value of the washing water is greater than 6.5.

[0058] The cleaned semi-finished product is vacuum-dried at 60°C for 60 minutes, then crushed to -0.074mm, 100%, sealed and packaged, which is the finished drug. The chlorine content of the finished medicament was tested to be 9.66%.

Embodiment 2

[0060] 100g of lignite with a volatilization of 35.8% is crushed, and then added into a ball mill for pulverization.

[0061] Add 400g of water to the coal powder to make the water-to-coal ratio 4 to make a coal slurry.

[0062] Under the state of stirring at 600 rpm, continuously add liquid chlorine to the coal slurry for 300 minutes, totaling 25.0 g. After the liquid chlorine was added, stirring was continued for 60 minutes.

[0063] After the chlorination is completed, solid-liquid separation is carried out, deionized water is added, and the pH value of the washing water is checked to be 7.0.

[0064] The cleaned semi-finished product is vacuum-dried at 70°C±5°C, then crushed to -0.074mm, 100%, sealed and packaged, which is the finished drug. The chlorine content of the finished medicament was tested to be 21.39%.

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Abstract

The invention provides a coal-based radioactive sewage treatment agent preparation method, which includes the following steps: (A) crushing and adding raw coal into water to prepare coal slurry; and (B) adding a chlorinating agent into the coal slurry under the stirring condition, continuously stirring and chlorinating to obtain a coal-based radioactive sewage treatment agent, wherein the stirringspeed in the step (B) is 50-900 rpm, the chlorination time in the step (B) is 120-600 min, and the chlorination temperature in the step (B) is 20-60 DEG C. According to the method, the raw coal is chlorinated, unstable chemical bonds and side chains in the coal are broken, produced small molecular products enter a liquid phase, and smaller molecular carbon dioxide enters a gas phase to volatilize; and meanwhile, an aromatic structure of humic acid in the coal forms larger molecular chlorine-containing anionic functional groups, so that the agent has physical adsorption, chemical complexationand chelating properties for heavy metals and radioactive elements. The invention further provides a coal-based radioactive sewage treatment agent and an application thereof.

Description

technical field [0001] The invention belongs to the technical field of radioactive sewage treatment, and in particular relates to a coal-based radioactive sewage treatment agent, a preparation method and an application. Background technique [0002] Radioactive elements are the components of the earth's materials and ecosystems. They not only maintain the survival, reproduction and development of various organisms, but also are increasingly widely used in nuclear energy engineering, space technology, military industry, medical equipment, crop improvement, etc. Various forms of organisms on the earth have adapted to low-concentration radioactive radiation from space and underground, and have established a dynamic natural balance system with these radioactive radiation. However, if this balance system is destroyed, it may cause damage to the ecology or bring adverse effects to human beings. [0003] Among the natural radioactive elements, uranium (U), thorium (Th), strontium ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62G21F9/04G21F9/12C02F101/20C02F101/22
Inventor 蒋复量吴浩楠罗明亮李向阳洪昌寿王者
Owner NANHUA UNIV
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