The invention discloses an
activated carbon preparation method of a
sludge type argillaceous
biomass. The method comprises: carrying out a process of constructing and conditioning micro-explosion agent / aggregate, a process of solar sandwich
drying and a process of activation two-stage
pyrolysis; uniformly mixing the
sludge obtained after
dehydration of the
sludge type argillaceous
biomass, the micro-explosion agent and the aggregate in a
mass ratio of 8.5:0.5:1.0-6:2:2 of a
dry basis, then carrying out distribution, carrying out
drying in a solar sandwich
drying system, then carrying out two-stage
pyrolysis in a
pyrolysis furnace, controlling the temperature of the initial
carbonization stage at 230 DEG C for 20 minutes, then raising the temperature to 400 DEG C at a rate of 20-40 DEG C / min, making a stop for 30-60minutes, and introducing
water vapor into a
water vapor activation stage at a flow rate of 0.1-1L / (min.G), wherein the pyrolysis final temperature is 550-650 DEG C, the
residence time is 20-60 minutes, the EET of the formed
activated carbon is 200-500m2 / g, and the particle size is less than 20mm; and the micro-explosion agent is one or more of
ammonium nitrate,
potassium ammonium nitrate and
calcium ammonium nitrate, and the aggregate is a waste circuit board. The preparation method disclosed by the invention comprehensively uses
solar drying, micro-explosion agent swelling pore-forming and waste resin to construct a framework, and thereby improving the
solar drying efficiency of the sludge and the quality of the
activated carbon.