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Active coke for flue gas desulfurization, and preparation method thereof

A technology of activated coke and flue gas, which is applied in the field of comprehensive utilization of resources, can solve the problems of increasing the ash content of activated coke, achieve good adsorption performance, reduce production costs, and shorten the activation time

Active Publication Date: 2020-04-24
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the inorganic binder will increase the ash content in the active coke

Method used

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  • Active coke for flue gas desulfurization, and preparation method thereof
  • Active coke for flue gas desulfurization, and preparation method thereof
  • Active coke for flue gas desulfurization, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] The method for preparing activated coke for flue gas desulfurization from low-rank coal in this embodiment comprises the following steps:

[0044] Step 1, raw material preparation: take a certain amount of small particle semi-coke, wash it twice, dry it in a vacuum drying oven for 6 hours, put the dried small particle semi-coke into a pulverizer, and pass it through a 200-mesh sieve to obtain the required particle size semi-coke powder; dry low metamorphic pulverized coal and crush it through a 200-mesh sieve to obtain low metamorphic coal powder with the required particle size; prepare an ethanol solution with a solute mass percentage of 8% for later use; weigh the raw materials according to the required raw materials in different proportions Dry materials, raw materials, by mass percentage, contain 5% phenolic resin, 5% sodium humate, 5% sodium bentonite, 42.5% low-modified coal powder, 42.5% semi-coke powder;

[0045] Step 2, mix the above-mentioned dry materials of ...

Embodiment 2

[0051] The method for preparing activated coke for flue gas desulfurization from low-rank coal in this embodiment comprises the following steps:

[0052] Step 1, raw material preparation: take a certain amount of small particle semi-coke, wash it 3 times, dry it in a vacuum drying oven for 7 hours, put the dried small particle semi-coke into a pulverizer, and pass it through a 200-mesh sieve to obtain the required particle size semi-coke powder; dry the low-modified pulverized coal and crush it through a 200-mesh sieve to obtain the low-modified coal powder with the required particle size; prepare an ethanol solution with a solute mass percentage of 9% for later use; weigh the raw materials according to the required raw materials in different proportions Dry materials, raw materials, by mass percentage, contain 10% phenolic resin, 5% sodium humate, 10% sodium bentonite, 37.5% low-modified coal powder, 37.5% semi-coke powder;

[0053] Step 2, mix the above-mentioned dry materia...

Embodiment 3

[0059] The method for preparing activated coke for flue gas desulfurization from low-rank coal in this embodiment comprises the following steps:

[0060] Step 1, raw material preparation: take a certain amount of small particle semi-coke, wash it 4 times, dry it in a drying oven for 8 hours, put the dried small particle semi-coke into a pulverizer, and pass it through a 200-mesh sieve to obtain the desired particle size. Semi-coke powder; dry low metamorphic pulverized coal and crush it through a 200-mesh sieve to obtain low metamorphic coal powder with the required particle size; prepare an ethanol solution with a solute mass percentage of 10% for later use; weigh raw materials according to different proportions of raw materials required Material, in the raw material, by mass percentage, it contains 15% phenolic resin, 10% sodium humate, 5% sodium bentonite, 35% low metamorphic coal powder, and 35% semi-coke powder;

[0061] Step 2, mix the above-mentioned dry materials of ra...

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Abstract

The invention belongs to the technical field of comprehensive utilization of resources, and relates to an active coke for flue gas desulfurization, and a preparation method thereof. The preparation method comprises the following steps: mixing low metamorphic pulverized coal, semicoke powder, phenolic resin, sodium humate and sodium bentonite to obtain a mixture A, wherein the mixture Acontains, bymass, 35-42.5% of the low metamorphic pulverized coal, 35-42.5% of the semicoke powder, 5-15% of the phenolic resin, 5-15% of sodium humate and 5-15% of sodium bentonite; adding an ethanol solution of which the solute mass is 8-10% and deionized water into the mixture, uniformly mixing, and performing compression molding under the pressure of 5-7 MPa to obtain formed material strips; drying the formed material strips; carbonizing and activating the dried formed material strips in a protective atmosphere; and carrying out activation treatment to obtain the active coke material for flue gas desulfurization. The method is simple in process and low in cost, and opens up a new development and application way for high-added-value utilization of the low-rank coal.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of resources, and relates to an active coke for flue gas desulfurization and a preparation method thereof. Background technique [0002] Activated coke, as the desulfurizer of activated coke dry flue gas desulfurization technology, will greatly affect its desulfurization performance and technical cost. Traditional activated coke is obtained by using raw coal (bituminous coal, lignite, etc.) as the matrix, and high-temperature coal tar as the binder, which is fully mixed and then extruded, carbonized and activated. Because raw coal is used as the base material, the carbonization and activation time is long and the energy consumption is large; and coal tar is expensive, which makes the production cost of activated coke high. Therefore, reducing the cost of active coke production is the key to reducing the cost of activated coke flue gas desulfurization technology. [0003] The Ju...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C01B32/318C01B32/336B01D53/02
CPCB01J20/20B01J20/28095B01J20/3042C01B32/318C01B32/336B01D53/02B01D2257/30B01D2258/0283
Inventor 田宇红呼书迪兰新哲周军李林波
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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