Method for producing calcium carbonate by adopting thiourea waste residues and resolution gas from petroleum coking hydrogenation and hydrogen preparation apparatus as raw materials
A technology of thiourea waste residue and hydrogen production equipment, which is applied to the removal of calcium carbonate/strontium/barium, solid waste, etc., can solve the problems of ineffective utilization of analytic gas, low cost, and low energy consumption, and achieve low cost, The effect of simple process and low energy consumption
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Embodiment 1
[0026] Weigh 200kg of thiourea waste residue with a moisture content of 50%, add 1m 3 Inject 467L of tap water into the high-pressure reactor to obtain an emulsion with a thiourea waste residue content of 15%, keep the pressure at 1MPa, and adjust the stirring speed to 130r / min; pass the analytical gas in the gas cylinder until the pH detector detects When the indicated value is less than 6.0, stop the reaction. Centrifuge with a screw discharge sedimentation centrifuge (rotational speed 13.3r / min), and place the solid matter in an oven at 105°C for 2 hours. The dried solids are placed in a combustion furnace, and the temperature in the furnace is set to 700°C, so that the activated carbon is completely spontaneously ignited, oxidized, and volatilized, and calcium carbonate that meets the requirements of the industrial precipitated calcium carbonate standard (HG / T2226-2000) is obtained.
Embodiment 2
[0028] Take by weighing 1 ton of thiourea waste residue with a water content of 40%, to 3m 3 Add 1400L industrial wastewater into the filter residue tank; add thiourea waste residue into the filter residue tank to obtain an emulsion with a thiourea waste residue content of 25%, keep the pressure in the tank at 1.2MPa, and adjust the stirring speed to 100r / min; from the bottom of the tank Introduce the analytical gas treated by the liquid separation tank to make the calcium hydroxide react with excess carbon dioxide; when the pressure in the tank begins to rise significantly, take a sample from the side sampling port of the tank, and check the pH with pH test paper until the pH < 6.0, stop reaction. After being centrifuged by a spiral unloading sedimentation centrifuge (speed 13.3r / min) and dried in a fluidized bed, it is placed in a combustion furnace, and the temperature in the furnace is set at 680°C to make the activated carbon completely spontaneously ignite, oxidize, and ...
Embodiment 3
[0030] Take by weighing 4 tons of thiourea waste slag with a moisture content of 55%, to 10m 3Add 3200L rainwater into the ash tank; add thiourea waste residue into the ash tank to obtain an emulsion with a thiourea waste residue content of 25%, keep the pressure in the tank at 1.1MPa, and adjust the stirring speed to 150r / min; The analytic gas treated by the liquid separation tank is introduced into the bottom to make the calcium hydroxide react with excess carbon dioxide; when the pressure in the tank starts to rise obviously, take a sample from the side sampling port of the tank, and check the pH with a pH meter. When the pH is less than 6.0, Stop responding. After being centrifuged by a spiral unloading sedimentation centrifuge (rotation speed 13.3r / min), and dried in a fluidized bed, it is placed in a combustion furnace, and the temperature in the furnace is set at 750°C to make the activated carbon completely spontaneously ignite, oxidize, and volatilize to obtain indust...
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