Low-cost medium-concentration lignite water slurry preparation method
A coal-water slurry, low-cost technology, applied in the direction of liquid carbon-containing fuel, petroleum industry, fuel, etc., can solve the problems of immature preparation technology of high-concentration lignite coal-water slurry, large investment, no industrial application examples, etc., to achieve the expected Low heating temperature, less investment, less dust pollution effect
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Embodiment 1
[0034] In this example, the lignite in a certain place in Inner Mongolia has an internal water content of 20.95%, a volatile matter content of 35.13%, and an original slurry concentration of 52%.
[0035] A low-cost medium-concentration lignite coal-water slurry preparation method comprises the following steps:
[0036] Step 1: Send lignite from a place in Inner Mongolia to the crusher for crushing until the particle size is below 5mm, and then send it into the barrel;
[0037] Step 2: Turn on the barrel heating device to raise the temperature of the fine-grained coal to about 90°C;
[0038] Step 3: The fine-grained coal heated by the barrel enters the roller press and is extruded under a pressure of 15MPa. After destroying the inner pores of the fine coal particles, the moisture in the pores of the fine coal particles is precipitated, and the precipitated moisture accounts for about 5-35% of water;
[0039] Step 4: The obtained wet sticky coal falls into the screw feeder, w...
Embodiment 2
[0041] In this example, the moisture content of the lignite in a certain place in Yunnan is 30.68%, the volatile matter content is 38.26%, and the original slurry concentration is 46%.
[0042] A low-cost medium-concentration lignite coal-water slurry preparation method comprises the following steps:
[0043] Step 1: Send lignite from a certain place in Yunnan into a crusher for crushing until the particle size is within 5mm, and then send it into the barrel;
[0044] Step 2: Turn on the barrel heating device to raise the temperature of the fine-grained coal to about 100°C;
[0045] Step 3: The fine-grained coal heated by the barrel enters the roller press, and is extruded under a pressure of 25MPa. After destroying the inner pores of the fine coal particles, the moisture in the fine coal particles is precipitated, and the precipitated moisture accounts for about the total moisture 5-50% of;
[0046] Step 4: The obtained wet caking coal falls into the screw feeder, weighs an...
Embodiment 3
[0048] In this example, the young bituminous coal from a certain place in Shaanxi has a moisture content of 9.42%, a volatile matter content of 32.15%, and an original pulping concentration of 56%.
[0049] A low-cost medium-concentration lignite coal-water slurry preparation method comprises the following steps:
[0050] Step 1: Send young bituminous coal from a certain place in Shaanxi to the crusher for crushing until the particle size is within 5mm, and then send it into the barrel;
[0051] Step 2: Turn on the barrel heating device and the humidifying device at the same time, so that the moisture ratio in the coal rises to about 16%, and the temperature of the fine-grained coal rises to about 90°C;
[0052] Step 3: The fine-grained coal heated by the barrel enters the roller press, and is extruded under a pressure of 20 MPa. After destroying the inner pores of the fine coal particles, the moisture in the fine coal particles is precipitated, and the precipitated moisture a...
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