Method for preparing combustible gas with radix rehmanniae dregs
A technology of medicinal residues and raw land, which is applied in the manufacture of combustible gas, chemical instruments and methods, granular/powder fuel gasification, etc., can solve the problems of poor biomass effect and low combustible gas yield, save resources, promote The effect of resource recycling and controllable conditions
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[0037] The preparation method of described pyrolysis catalyst comprises the following steps:
[0038] S31: Mix alkaline clay, cerium oxide, lanthanum oxide, cobalt oxide, nickel oxide, titanium oxide, aluminum oxide, zinc oxide, barium oxide, magnesium oxide, and silica sol at a stirring speed of 80-180r / min for 6-10min , to obtain spherical particles I;
[0039] The preparation method of alkaline clay described in step S31, comprises the following steps:
[0040] S311: mix bentonite and activated clay wastewater with a concentration of 10% at a weight ratio of 2:9, and stir evenly at a rotating speed of 300r / min to obtain slurry material I;
[0041] S312: Add the slurry material I prepared in step S311 to the inorganic mixed acid with a concentration of 16%, the inorganic mixed acid is phosphoric acid with a concentration of 19wt%, hydrochloric acid with a concentration of 38wt%, and sulfuric acid with a concentration of 27wt% by volume Mixed acid composed of 3:3:2, the wei...
Embodiment 1
[0052] A method for preparing combustible gas from raw earth medicinal dregs, comprising the following steps:
[0053] S1: Dried the raw ground medicine dregs with hot air to a moisture content of 13% to obtain the dried raw ground medicine dregs. The hot air is obtained by heat exchange between coal flue gas and air, and the temperature of the coal flue gas is 1000°C. The air temperature is 20°C, and the hot air temperature is 420°C;
[0054] S2: Pulverize the dried ground medicine dregs prepared in step S1, and pass through a 500-mesh sieve to obtain dried ground medicine residues;
[0055] S3: Mix the dried ground medicinal dregs prepared in step S2 with the pyrolysis catalyst for 12 minutes at a stirring speed of 110 r / min to prepare mixture I. The mass ratio of the dried raw ground medicinal dregs to the pyrolysis catalyst is 240:2, the pyrolysis catalyst is in parts by weight, including the following raw materials: 24 parts of alkaline clay, 4 parts of cerium oxide, 4 p...
Embodiment 2
[0070] A method for preparing combustible gas from raw earth medicinal dregs, comprising the following steps:
[0071] S1: Dried raw ground medicine dregs with hot air to a moisture content of 10% to obtain dried raw ground medicine residues. The hot air is obtained by heat exchange between coal flue gas and air, and the temperature of the coal flue gas is 820°C. The air temperature is 10°C, and the hot air temperature is 280°C;
[0072] S2: Pulverize the dried ground medicine dregs prepared in step S1, and pass through a 300-mesh sieve to obtain dried ground medicine dregs;
[0073] S3: Mix the dried ground medicinal dregs prepared in step S2 with the pyrolysis catalyst for 14 minutes at a stirring speed of 80 r / min to prepare mixture I. The mass ratio of the dried ground medicinal dregs to the pyrolysis catalyst is: 175:1, the pyrolysis catalyst is in parts by weight, including the following raw materials: 10 parts of alkaline clay, 3 parts of cerium oxide, 3 parts of lanth...
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