A method for remote transportation of coal-water slurry with supercritical carbon dioxide viscosity reduction
A technology for long-distance transportation of carbon dioxide, applied in the field of coal chemical industry, can solve the problems of high viscosity and high cost of long-distance transportation, and achieve the effects of reducing viscosity, improving gasification efficiency, and reducing oxygen consumption
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Embodiment 1
[0013] The Hanglaiwan coal was put into the sample preparation machine and ground for 30 seconds to obtain the coal powder with the particle size distribution shown in Table 1.
[0014] Table 1 The particle size distribution of pulverized coal
[0015] Sample sieve (mesh)
[0016] Such as figure 1 As shown, 2042.32g coal powder, 1154.64g water, 3.04g coal-water slurry additive (produced by Yulin Tianrun Chemical Co., Ltd.) were added to the coal slurry tank 2 equipped with an agitator, and stirred for 20 minutes to obtain a uniform For coal water slurry, its apparent viscosity measured in a rotational viscometer is 930.25mPa·s. Heat 2400g of the prepared coal-water slurry to 40°C, and then transport it to the high-pressure mixing tank 4 with a volume of 3L equipped with a stirrer through the high-pressure coal slurry pump 3. Under the stirring state, the supercritical carbon dioxide is passed through the compressor 1 After pressurization, it is transported into the...
Embodiment 2
[0018] In embodiment 1, supercritical carbon dioxide is transported in the high-pressure mixing tank 5 through the pipeline extending to the middle and lower part of the high-pressure mixing tank 5 after being pressurized by the compressor 4, until the pressure in the high-pressure mixing tank 5 is 5MPa, and stirring makes carbon dioxide and The coal-water slurry was fully mixed evenly, and other steps were the same as in Example 1. The viscosity of the coal-water slurry mixed with carbon dioxide was measured to be 775.20mPa·s.
Embodiment 3
[0020] In embodiment 1, supercritical carbon dioxide is transported in the high-pressure mixing tank 5 through the pipeline extending to the middle and lower part of the high-pressure mixing tank 5 after being pressurized by the compressor 4, until the pressure in the high-pressure mixing tank 5 is 6MPa, and stirring makes carbon dioxide and The coal-water slurry was fully mixed evenly, and other steps were the same as in Example 1. The viscosity of the coal-water slurry mixed with carbon dioxide was measured to be 715.57mPa·s.
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