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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 such as mercury in flue gas soil and water have not been reported so far

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of manufacture method of activated carbon special for mercury removal, it comprises the following steps: by weight percentage, with anthracite 75%, bituminous coal 18% and 7% MgSO 4 , mix and make powder, and then, use the prepared mixed powder, according to the weight percentage, use 65% of powder, 5% of asphalt, 27% of coal tar and 3% of water to fully mix evenly, and then press it into strips , and then after drying, carbonization, activation, crushing / screening, take the finished product on the sieve, soak it in more than 90% concentrated sulfuric acid for 8 hours, wash and recover the sulfuric acid, adjust the pH to 8 with NaOH, and finally dry it and sieve it. become.

[0018] Wherein the carbonization condition in the carbonization step is that the temperature of the tail end of the carbonization furnace is controlled at 280-300°C, the heating rate is 3-10°C / min, and the amount of feeding is that the volume occupied in the furnace is 4%-10% of the total sp...

Embodiment 2

[0020] A kind of manufacture method of activated carbon special for mercury removal, it comprises the following steps: by weight percentage, with anthracite 70%, bituminous coal 25%, 5% MgO or MgSO 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 60% of powder, 7% of asphalt, 30% of coal tar and 3% of water to fully mix evenly, and then press it into strips , and then after drying, carbonization, activation, crushing / screening, take the finished product on the sieve, soak it in more than 90% concentrated sulfuric acid for 10 hours, wash and recover the sulfuric acid, adjust the pH to 6 with KOH, and finally dry it and sieve it. become.

[0021] Other conditions are with embodiment 1.

Embodiment 3

[0023] A method for manufacturing activated carbon special for mercury removal, which comprises the following steps: using 80% of anthracite, 16% of bituminous coal and 4% of MgO by weight percentage, mixing powder, and then, using the prepared mixed powder, by weight percentage , use 60% of powder, 7% of asphalt, 30% of coal tar and 3% of water to fully mix evenly, and then press into strips by a press, and then after drying, carbonization, activation, crushing / screening, take 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 with embodiment 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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