Method for preparing special-purpose active carbon for removing mercury and products thereof

A manufacturing method, activated carbon technology, applied in chemical instruments and methods, other chemical processes, etc.

Inactive Publication Date: 2008-02-13
BEIJING KANGRUI XINYUAN PURIFICATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, activated carbon products specially used to remove heavy metals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1:

[0017] A manufacturing method of special activated carbon for mercury removal, which comprises the following steps: using 75% anthracite, 18% bituminous coal and 7% MgSO by weight percentage 4 , Mix and make powder, and then use the prepared mixed powder, according to the weight percentage, use powder 65%, pitch 5%, coal tar 27% and water 3% to mix well, and then press into strips After drying, carbonization, activation, crushing / sieving, take the finished product and soak it with more than 90% concentrated sulfuric acid for 8 hours. After the sulfuric acid is washed and recovered, the pH is adjusted to 8 with NaOH, and finally dried and then sieved. to make.

[0018] The carbonization conditions in the carbonization step are that the temperature of the end of the carbonization furnace is controlled at 280-300°C, the temperature rise rate is 3-10°C / min, and the amount of feed is that the volume occupied in the furnace is 4%-10 of the total space of the furnace ...

Example Embodiment

[0019] Example 2:

[0020] A manufacturing method of special activated carbon for mercury removal, which includes the following steps: using 70% anthracite, 25% bituminous coal, 5% MgO or MgSO by weight percentage 4 Or 2% MgO and 3% MgSO 4 , Mix and make powder, and then use the prepared mixed powder, according to the weight percentage, use powder 60%, pitch 7%, coal tar 30% and water 3% to mix well, and then press into strips After drying, carbonization, activation, and crushing / sieving, take the finished product and soak it with more than 90% concentrated sulfuric acid for 10 hours. After the sulfuric acid is washed and recovered, the pH is adjusted to 6 with KOH, and finally dried and then sieved. to make.

[0021] Other conditions are the same as in Example 1.

Example Embodiment

[0022] Example 3:

[0023] A manufacturing method of activated carbon special for mercury removal, which comprises the following steps: according to weight percentage, 80% anthracite, 16% bituminous coal and 4% MgO are mixed to make powder, and then the prepared mixed powder is used according to weight percentage , Use powder 60%, pitch 7%, coal tar 30% and water 3% to mix thoroughly and evenly, and then press into a strip, and then after drying, carbonization, activation, crushing / screening, take it on the sieve The finished product is soaked in more than 90% concentrated sulfuric acid for 8 hours. After the sulfuric acid is washed and recovered, the pH is adjusted to 7 with NaOH, and finally dried and sieved.

[0024] Other conditions are the same as in Example 1.

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PUM

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Abstract

A manufacture method of a special activated carbon for removing mercury, including the following steps: According to the weight percentage, a blind coal of 70%-80%, a soft coat of 15%-25%, an MgO of 2%-5% andor an MgSO4 of 3%-10% are mixed to produce a powder. According to the weight percentage, the produced powder material of 60%-65%, an asphalt of 5%-10%, a coal tar of 25%-30% and a water of 3%-5% are mixed evenly and then pressed to a strip shape by a press. After sunning, carbonization, activation, breaking or screen separation, the finished product on the screen is obtained. After dipped in a concentrated sulfuric acid of more than 90 percent for 8-10 hours, the finished product is washed by vitriol and then reclaimed. The pH is adjusted to be between 4 and 8 by an alkali. After drying and screen separation, the process is finished. The special activated carbon for removing the mercury produced according to the present invention is mainly used to remove the mercury and other metal pollution in the smoke, soil and water efficiently and reliable, cleaning the environment and protecting the health. The present invention has the strong removing capability, low cost and good effect.

Description

technical field [0001] The invention relates to a method for manufacturing activated carbon and its product, in particular to a method for manufacturing activated carbon special for mercury removal and its product. Background technique [0002] At present, there are many kinds of activated carbon products with a wide range of uses, mainly coal-based granular carbon and coal-based column carbon. Their production process is mainly raw coal-crushing-milling-kneading-forming (extrusion)-carbonization-activation-post-treatment -Packaging, which can be widely used in sewage treatment, waste gas treatment, etc., but most of the existing activated carbons have problems such as small specific surface area, insufficient strength, underdeveloped mesopores and poor adsorption effect, and are dedicated to a certain aspect of activated carbon There are few products, and the special activated carbon products that have been publicly reported are all used to adsorb hydrogen sulfide and SO in...

Claims

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Application Information

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IPC IPC(8): C01B31/08B01J20/20
Inventor 邹炎
Owner BEIJING KANGRUI XINYUAN PURIFICATION TECH
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