Method of hydrogenation recycling of waste mineral oil
A waste mineral oil and pre-hydrogenation technology, applied in the petroleum field, can solve the problems of low product quality, the production of a large number of acid residues, alkali residues, clay residues, and secondary pollution of the environment of the clay residues, etc., to achieve high product quality, avoidance of Effects of coking and cracking
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Embodiment 1
[0048] Step 1: First, all kinds of mechanical impurities in the collected waste mineral oil are removed in a conical tank by means of pressurized sedimentation, filtration and centrifugal separation, and the pressure is controlled at 0.2MPa.
[0049] Step 2: Heat the waste lubricating oil that has been removed from mechanical impurities to reduce the viscosity and density of the oil, increase the difference between the density of water and the density of oil, and accelerate the separation of water and oil under a certain pressure, thereby More efficient removal of moisture contained in oil.
[0050] Step 3: Remove the light oil components and emulsified water from the oil product that has removed mechanical impurities and a large amount of water by means of vacuum flash evaporation. The flash evaporation conditions are: temperature 80°C, pressure -0.05MPa.
[0051] Step 4: The flash evaporated oil enters the first effect evaporator from the bottom of the flash tower, and the ...
Embodiment 2
[0057] Step 1: First, all kinds of mechanical impurities in the collected waste mineral oil are removed in a conical tank by means of pressurized sedimentation, filtration and centrifugal separation, and the pressure is controlled at 0.5MPa.
[0058] Step 2: Heat the waste lubricating oil that has been removed from mechanical impurities to reduce the viscosity and density of the oil, increase the difference between the density of water and the density of oil, and accelerate the separation of water and oil under a certain pressure, thereby More efficient removal of moisture contained in oil.
[0059] Step 3: Remove the light oil components and emulsified water from the oil product that has removed mechanical impurities and a large amount of water by means of vacuum flash evaporation. The flash evaporation conditions are: temperature 120°C, pressure -0.08MPa.
[0060] Step 4: The flash evaporated oil enters the first effect evaporator from the bottom of the flash tower, and the...
Embodiment 3
[0065] Step 1: First, all kinds of mechanical impurities in the collected waste mineral oil are removed in a conical tank by means of pressurized sedimentation, filtration and centrifugal separation, and the pressure is controlled at 0.35MPa.
[0066] Step 2: Heat the waste lubricating oil that has been removed from mechanical impurities to reduce the viscosity and density of the oil, increase the difference between the density of water and the density of oil, and accelerate the separation of water and oil under a certain pressure, thereby More efficient removal of moisture contained in oil.
[0067] Step 3: Remove the light oil components and emulsified water from the oil product that has removed mechanical impurities and a large amount of water by means of vacuum flash evaporation. The flash evaporation conditions are: temperature 100°C, -0.06MPa.
[0068] Step 4: The flash evaporated oil enters the first effect evaporator from the bottom of the flash tower, and the oil ent...
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