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Preparation method of composite coal-based adsorbing material

An adsorption material and coal-based technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of short saturation period of activated carbon adsorbent, high cost of regeneration technology, low combustion activity, etc., and achieve high combustion activity and dehydration efficiency High, low activation effect

Inactive Publication Date: 2015-11-18
沧州绿源水处理有限公司
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  • Abstract
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Problems solved by technology

[0003] Most of the raw materials for adsorbent production are refined anthracite coal with high price as the production raw material, and the production cost is relatively high. Moreover, after the used activated carbon becomes saturated coal-based activated carbon, its combustion activity is not high, so it can no longer be used as fuel. The regeneration method is used as an adsorption material again. The current activated carbon regeneration technology has high cost and low recovery rate, and it is easy to cause secondary pollution.
[0004] When manufacturers deal with high-concentration chemical wastewater, due to the short saturation cycle of activated carbon adsorbents, long regeneration time and high cost, it has become a very difficult problem for water treatment manufacturers

Method used

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Effect test

preparation Embodiment 1

[0023] The preparation method of a kind of composite coal-based adsorption material of the present invention comprises the following steps:

[0024] Choose low-rank coal as raw material for crushing, after passing through a 5-mesh sieve, add calcium carbonate according to the mass ratio of 100:5 and mix evenly, among which, the raw material low-rank coal selection index should meet: moisture ≤ 8%, ash 10-20%, The volatile matter is 20-40% (mass percentage), and the calorific value is not less than 4000 kcal; then the mixed powder is sent to the muffle furnace, and under the protection of nitrogen, the heating rate is 8-10 ℃ / min from room temperature to Raise the temperature to 500°C and keep it for 30 minutes; the non-carbon elements in the pulverized coal are volatilized and carbonized to become semi-coke; then continue to feed water vapor into the muffle furnace, and control the flow of water vapor to 0.1ml / min·g through a flow meter, so that The pressure in the muffle furna...

preparation Embodiment 2

[0026] The preparation method of a kind of composite coal-based adsorption material of the present invention comprises the following steps:

[0027] Choose low-rank coal as raw material for crushing, after passing through 8-mesh sieve, add sodium carbonate according to the mass ratio of 100:1 and mix evenly. The volatile matter is 20-40% (mass percentage), and the calorific value is not less than 4000 kcal; then the mixed powder is sent to the muffle furnace, and under the protection of nitrogen, the heating rate is 8-10 ℃ / min from room temperature to Raise the temperature to 400°C and keep it for 45 minutes; the non-carbon elements in the pulverized coal are volatilized and carbonized to become semi-coke; then continuously feed water vapor into the muffle furnace, and control the flow of water vapor to 0.15ml / min·g with a flow meter, so that The pressure in the muffle furnace is maintained at about 400KPa, and the temperature is raised to 800°C at a heating rate of 20°C / min, ...

preparation Embodiment 3

[0029] The preparation method of a kind of composite coal-based adsorption material of the present invention comprises the following steps:

[0030] Choose low-rank coal as raw material for crushing, after passing through a 7-mesh sieve, add sodium carbonate according to the mass ratio of 100:3 and mix evenly. The volatile matter is 20-40% (mass percentage), and the calorific value is not less than 4000 kcal; then the mixed powder is sent to the muffle furnace, and under the protection of nitrogen, the heating rate is 8-10 ℃ / min from room temperature to Raise the temperature to 450°C and keep it for 40 minutes; the non-carbon elements in the pulverized coal are volatilized and carbonized to become semi-coke; then continue to feed water vapor into the muffle furnace, and use a flow meter to control the flow of water vapor to 0.1ml / min·g, so that The pressure in the muffle furnace is maintained at about 400KPa, and the temperature is raised to 750°C at a heating rate of 15°C / min...

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Abstract

The invention relates to the field of the preparation of nonmetallic materials, and provides a preparation method of a composite coal-based adsorbing material. The invention comprises the following steps of: using low-rank coal as raw materials, crushing the low-rank coal, sieving the crushed low-rank coal, adding a silicon aluminum cross-linking agent, and uniformly mixing the sieved low-rank coal and the silicon aluminum cross-linking agent, wherein the weight proportion of the low-rank coal to the silicon aluminum cross-linking agent is 100:(1-5); feeding uniformly mixed fine materials into a muffle furnace, under the effect of nitrogen protection, warming the fine materials to 400-500 DEG C, and maintaining the temperature for 30-45 minutes; enabling steam to be continuously led into the muffle furnace, raising temperature to 700-800 DEG C, maintaining the temperature for 45-60 minutes, and then naturally cooling the fine materials to a room temperature; and baking the cooled materials so as to obtain the composite coal-based activated carbon material. The preparation method disclosed by the invention is simple and easy to operate, the cost of the raw materials is low, and the operating cost is low; the prepared composite coal-based adsorbing material is good in adsorbability, and high in combustion activity, and the coal can be effectively recycled.

Description

technical field [0001] The invention relates to the field of preparation of inorganic non-metallic materials, in particular to a preparation method of a composite coal-based adsorption material. Background technique [0002] Due to the abundant coal resources in my country, which are cheap and easy to obtain compared with other raw materials, the research on the process of producing coal-based adsorbents using coal as raw materials has developed rapidly in recent years. In the field of treatment, organic matter in sewage is removed, COD is reduced to achieve discharge standards. [0003] Most of the raw materials for adsorbent production are refined anthracite coal with high price as the production raw material, and the production cost is relatively high. Moreover, after the used activated carbon becomes saturated coal-based activated carbon, its combustion activity is not high, so it can no longer be used as fuel. The current activated carbon regeneration technology is high...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30
Inventor 于宗然张国玺张永梅白庆华
Owner 沧州绿源水处理有限公司
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