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Modified active coke, production and uses thereof

A technology of active coke and modification, which is applied in the field of modified active coke and its preparation, can solve the problems of high cost, achieve the effect of high cost, great economic value and social significance, and simple preparation process

Inactive Publication Date: 2009-07-29
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon is used as an adsorbent to remove mercury in flue gas, and the cost is relatively high

Method used

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  • Modified active coke, production and uses thereof
  • Modified active coke, production and uses thereof
  • Modified active coke, production and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1, the preparation of modified active coke

[0029] 1. Preparation of Modifier

[0030] A potassium bromide (KBr) aqueous solution with a mass percent content of 0.1% was prepared.

[0031] 2. Preparation of active coke

[0032] Process route such as figure 1 As shown, the details are as follows:

[0033] 1. Crush the anthracite, then grind and knead it, form it into strips, and dry it for later use.

[0034] 2. Carbonize the product of step 1 at a final temperature of 550° C. for 2 hours to obtain a carbonized product.

[0035] 3. Activate the carbonization product in step 2 at a temperature of 800° C. for 1 hour to obtain activated coke.

[0036] 3. Preparation of modified activated coke

[0037] Modified active coke was prepared by coating method. use figure 2 The shown device prepares modified active coke. figure 2 The shown device is a closed system from top to bottom, including spray nozzle (1), right inlet (2), left inlet (3), heating zone (...

Embodiment 2

[0039] Embodiment 2, the preparation of modified active coke

[0040] 1. Preparation of Modifier

[0041] Preparation mass percentage composition is 10% potassium bromate (KBrO 3 ) aqueous solution.

[0042] 2. Preparation of active coke

[0043] Process route such as figure 1 As shown, the details are as follows:

[0044] 1. Crush the anthracite, then grind and knead it, form it into strips, and dry it for later use.

[0045] 2. Carbonize the product of step 1 at a final temperature of 700° C. for 1 hour to obtain a carbonized product.

[0046] 3. Activate the carbonized product in step 2 at a temperature of 950° C. for 0.5 hour to obtain activated coke.

[0047] 3. Preparation of modified activated coke

[0048] Modified active coke was prepared by coating method. use figure 2 The shown device prepares modified active coke. When in use, it is heated in the heating zone (from the middle section to the lower section of the furnace body), and the heating temperature ...

Embodiment 3

[0050] Embodiment 3, the preparation of modified active coke

[0051] 1. Preparation of Modifier

[0052] A potassium iodide (KI) aqueous solution with a mass percentage content of 1% was prepared.

[0053] 2. Preparation of active coke

[0054] Process route such as figure 1 As shown, the details are as follows:

[0055] 1. Crush the anthracite, then grind and knead it, form it into strips, and dry it for later use.

[0056] 2. Carbonize the product of step 1 at a final temperature of 700°C for 0.5 hours to obtain a carbonized product.

[0057]3. Activate the carbonized product in step 2 at a temperature of 850° C. for 1.5 hours to obtain activated coke.

[0058] 3. Preparation of modified activated coke

[0059] Modified active coke was prepared by coating method. use figure 2 The shown device prepares modified active coke. When in use, it is heated in the heating zone (from the middle section to the lower section of the furnace body), and the heating temperature i...

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Abstract

The invention discloses modified activated coke, and a preparation method and application thereof. The modified activated coke provided by the invention is the activated coke loaded with a modifier, and the modifier is at least one of bromide salt, bromate, iodate, chloride salt, and chlorate. The modified activated coke has strong capacity of adsorbing mercury, and has the demercuration efficiency in flue gas more than 95 percent. The invention utilizes the prior coal resources at home to prepare the modified activated coke with high performance, low cost and simple process, and achieves ideal effect when used for the demercuration in the flue gas. The invention contributes to solving the problems that the prior active carbon has high manufacturing cost and the prior activated coke has low demercuration efficiency, and has great economic value and social significance.

Description

technical field [0001] The invention relates to a modified active coke and its preparation method and application. Background technique [0002] In recent years, due to the growing calls for environmental protection at home and abroad, it has become an urgent problem to control various pollutants produced by coal combustion. Coal contains a trace amount of heavy metal element mercury, which is easily volatilized and discharged into the atmosphere together with flue gas during combustion, and it can exist in the atmosphere for a long time. When it settles down to a certain amount, it will pollute water sources and cause The mercury content in fish exceeds the standard, and then the human body absorbs a large amount of mercury through the food chain, which seriously affects human body function and health. Therefore, all countries are formulating emission standards in smoke. [0003] There are many studies on the removal of elemental mercury in flue gas by using various adsorb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12
Inventor 梁大明熊银伍孙仲超李艳芳李雪飞李兰庭
Owner CCTEG CHINA COAL RES INST
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