Flue gas adsorbent and preparation method thereof
A technology of adsorbent and flue gas, which is applied in the field of flue gas adsorbent and the preparation of the above-mentioned adsorbent, can solve the problems of high equipment operation and maintenance costs, secondary pollution of the environment, and cumbersome removal process, etc., to achieve enhanced chemical adsorption capacity, The effect of low equipment requirements and simple process
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[0022] A preparation method of a flue gas adsorbent, comprising the following steps:
[0023] Step 1, drying and carbonizing the straw in turn;
[0024] Step 2. After the fly ash, metakaolin, carbide slag, and carbonized straw are respectively dried and crushed, they are added to a planetary ball mill and ground to a particle size of less than 0.074 mm to obtain a mixed sample;
[0025] Step 3. Mix and stir the mixed sample with sulfate to obtain a mixed slurry;
[0026] Step 4. After mixing and stirring the mixed slurry with magnesium hydroxide, filter and retain the filter cake, and vacuum-dry the filter cake under the conditions of a vacuum degree of -80 to -100 kPa and a temperature of 100 to 150 °C to obtain an adsorbent. powder.
[0027] Through the above methods, the flue gas adsorbent of the present invention uses fly ash, metakaolin, straw, and calcium carbide slag as the main raw materials, and the four raw materials are industrial solid wastes. It also solves the...
Embodiment 1
[0029] A preparation method of a flue gas adsorbent, comprising the following steps:
[0030] Step 1. The wheat straw and the sorghum straw are dried, carbonized and mixed;
[0031] Step 2. After drying and crushing 30 parts of fly ash, 25 parts of metakaolin, 10 parts of calcium carbide slag, and 20 parts of carbonized straw respectively, they are added to a planetary ball mill and ground to a particle size of 0.06 mm to obtain a mixed sample;
[0032] Step 3, mixing and stirring the mixed sample with the ferrous sulfate and ferric sulfate mixed solution with a volume ratio of 2:1 to obtain a mixed slurry;
[0033] Step 4. After mixing and stirring the mixed slurry with magnesium hydroxide, filter and retain the filter cake, and vacuum-dry the filter cake under the conditions of a vacuum degree of -80 kPa and a temperature of 100° C. to obtain adsorbent powder.
Embodiment 2
[0035] A preparation method of a flue gas adsorbent, comprising the following steps:
[0036] Step 1. Drying and carbonizing dry branches and sorghum stalks and mixing;
[0037] Step 2. After drying and crushing 32 parts of fly ash, 25 parts of metakaolin, 6 parts of calcium carbide slag, and 21 parts of carbonized straw respectively, they are added to a planetary ball mill and ground to a particle size of 0.07 mm to obtain a mixed sample;
[0038] Step 3, mixing and stirring the mixed sample with the ferrous sulfate and ferric sulfate mixed solution with a volume ratio of 2:1 to obtain a mixed slurry;
[0039] Step 4. After mixing the mixed slurry with magnesium hydroxide and stirring, filter and retain the filter cake, and vacuum-dry the filter cake under the conditions of a vacuum degree of -85kPa and a temperature of 110° C. to obtain adsorbent powder.
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