Vacuum residue after heat exchanged with feedstock oil, it enters in to oxidation tower. As air is blowing from the bottom of oxidation tower, vacuum residue in the tower is oxidizing reacting with air. Fresh water is sprayed from the top of oxidation tower to control the temperature of gaseous phase temperature not higher than 160 c.

Tail gas from the top of oxidation tower will flow in to a saturator, tail gas contact with water and cooled down to have the dirty oil separated away from gas. The residual gas discharged from the top of saturator will flow in to water sealed tank. And residual gas discharged from the top of water sealed tank will be sent to residual gas incinerator, which will be discharged to air after burnt in a incinerator. The heat energy produced from tail gas can be used for heating up of the feedstock oil before entering in to vacuum tower.

The dirty oil discharged from saturator will flow in to residual oil tank, and then pumped out of unit periodically. Circulating diesel is pumped in to asphalt-diesel heat exchanger through diesel circulating pump to make its temperature increased from 65c to 140c.  The hot diesel will be cooled through diesel cooler with circulating water to have it down to 65c. The cooled diesel will be sent back to diesel circulating tank.

Compressed gas from the system pipe lines enters in to bottom of oxidation tower.

Saturator, residual oil tank, diesel tank are in the same case.

The degree of asphalt from 60-120 is controlled by the vacuum distillation extraction level, oxidation duration and air blowing quantity.

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 First heat up the crude oil to 90-130c through heat exchanger then add purified water and demulsifier, after mixing and then send in to electrical desalting and dewatering device to have the tiny droplets gradually extended to larger ,and then form a water layer to have water, dissolved salt, impurity ect removed.

After desalting treatment, crude oil is heated up to 220-250c to enter in to pre-fractionator, light gasoline is extracted from top of pre-fractionator, topped crude from tower bottom through heat exchanger and atmospheric furnace to be heated up to 360-370 c, then enters in to atmospheric distillation tower, to separate out gasoline, kerosene ,light diesel, heavy diesel fractions, after electrochemical treatment, they’re product oil for supply.

Atmospheric bottom heavy oil will be heated up to 380-400c

and then flow in to vacuum distillation tower, to separate out different vacuum fractions, these fractions will be used as raw materials for catalytic treatment or lubricating oil. Vacuum residue after heat exchanged and cooled to be fuel or heat exchanged to make raw materials for coking, catalytic cracking, oxidation asphalt.

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 1. Atmospheric distillation unit and vacuum distillation equipment, road paving asphalt oxidation unit, viscosity breaking unit, de-waxing unit, blending unit etc. basic refining equipment. Asphalt tanks, Heat exchanger, Laboratory testing equipment for refineries.

2. Industrial equipment such as gas compressors, cooling towers, mechanical pumps, oil filling stations, gas stations etc.. Cooling tower and heating furnace, Air station, LPG Compressor, High Purity Nitrogen Generator(P.S.A)

3. Used oil re-refining plant for mini refineries from 50TPD to 500TPD, recycling used oil in to base lube oil or catalytic diesel as per used oil properties and customer’s requirement. Mini- refinery for used oil re-refining.

4. Providing service for hydro-refining from petrol and diesel oil, catalytic reforming, hydro upgrading from diesel oil, hydrogenation from wax oil and coal tar, selective hydrogenation from catalytic gasoline, gas fractionation, MTBE and methanol synthesis, waste industrial oil re-refining.

5. Providing consulting service in petrochemical industry, including process, equipment, projects construction etc..

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Straight run diesel and motor oil are hydrocarbons of same group, the difference is their molecular weight, so through catalyzing cracking treatment, motor oil can be converted in to diesel. With rational design and proper treatment, this diesel is comparable to common diesel, the cetane number is high and this oil has stronger power especially suitable for heavy trucks fuel. But to ensure oil quality, the design of this kind of unit is very important, cracking shall be equably to avoid burnt of oil and change molecular chains and reduce the density of the oil. For example the distillation column size, height, design of catalyzing unit, treatment procedure etc. are very important which need experienced engineers make a rational design through good knowledge and practical operation experience. During processing, gasoline and diesel could be obtained through different distillation temperature ranges. 40-190c is gasoline fraction range, and 250-330c is diesel fraction range. After pyrolysis and cooling, Approx 85% liquid is similar to diesel and able to meet the specification of -15# diesel. They’re able to be used as industrial or civil-use fuel, even auto driven fuel. Motor oil is from a fraction after diesel in oil refining industry, they’re belong to the same petroleum family having different molecular weight, it is very feasible to produce diesel.

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 Thin film evaporation and short path molecular evaporation

Thin film evaporation and molecular evaporation is current widely used for used oil re-refining. Some used oil recycling plant manufacturers use thin film for light fraction separation, and molecular evaporation for base oil extraction, because molecular evaporation is more suitable for evaporation of high viscosity fluid. Our process separates light fraction through atmospheric distillation and extract base lube oil with short path evaporator. This is to reduce maintenance of equipment at light fraction separation stage, since column type distillation for light oil removal is more adaptable. There are many projects in the world using molecular projects failed, their plants are chocked very soon, or oil color is dark. Our process has avoided those problems and enhanced the advantages of molecular process maintaining the oil molecules and additives of oil under high vacuum and low temperature. This process especially superior for high grade luxury oil recycling with less impurities, and after regeneration, the recycled oil is similar to new lube oil without replenishment of additives. Generally this process is more expensive.

Advantages of short path molecular evaporation process

1.       High indexes of recycled oil, maintained the additives of oil.

2.       Advanced and popular process, good quality oil.

3.       Having superiority for high grade oil regeneration.

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