Waste engine oil regeneration diesel, catalytic cracking processing diesel equipment

Waste engine oil regeneration diesel, catalytic cracking processing diesel equipment

The new refining equipment has been improved in the following aspects: crude oil refining, abbreviated as refining, refers to the production of various petroleum products through various refining devices. There are three main methods of refining, namely atmospheric distillation, vacuum distillation, and cracking.

1、 Atmospheric distillation method

By using equipment such as heating furnaces and distillation towers, crude oil is gasified, and hydrocarbons (collectively known as hydrocarbons) begin to evaporate at different temperatures. These gaseous substances are then cooled into liquids, producing a series of petroleum products. The process flow is as follows:

1. Heat exchange of crude oil: In order to fully recover heat and exchange heat between crude oil and various fractions in the heat exchanger, the heat is generally exchanged to 200-250 ℃ and enters the primary distillation tower.

2. Initial distillation: The crude oil is first separated from a small amount of water, corrosive gases, and a portion of light gasoline in the initial distillation tower (pre fractionation tower). After condensation and cooling, it drops to 30-40 ℃ and enters the storage tank, with some used as reflux and some as gasoline components or heavy feed oil.

3. Atmospheric distillation: The oil obtained from the bottom of the initial distillation tower is called overhead oil, which is heated to 360-370 ℃ by a pump atmospheric furnace and enters the atmospheric tower. Gasoline is separated from the top of the tower and can be cooled to 30-40 ℃ through heat exchange and condensation. Some of it is used as overhead reflux and some as gasoline components. The atmospheric tower generally has 3-4 side lines, which produce kerosene, light diesel, and heavy diesel respectively.

2、 Vacuum distillation method

1. Using the principle of reducing pressure to lower boiling point, atmospheric heavy oil is fractionated in a vacuum tower to separate products such as diesel, lubricating oil, paraffin, asphalt, etc. from the heavy oil.

2. The temperature of the heavy oil at the bottom of the atmospheric tower is about 350 ℃, and it is pumped out by the oil pump to the vacuum heating furnace, and enters the vacuum tower at around 410 ℃.

3. The pressure in the vaporization section of a general vacuum tower is 40 milliliters

After condensation and cooling, it drops to 30-40 ℃ and enters the storage tank, with some used as reflux and some as gasoline components or heavy feed oil.

3. The general pressure in the vaporization section of the vacuum tower is 40 millimeters of mercury.

Meters of mercury.

4. Kerosene

Fuel for jet engines and tractors; Raw materials for manufacturing other products, liquids, mixtures of alkanes (10-18 carbon atoms) and aromatic hydrocarbons, boiling range=175-325 ℃.

5. Diesel or fractional diesel

Used as diesel engine fuel or heating oil; Raw materials for manufacturing other products, liquid alkanes with carbon atoms greater than or equal to 12, boiling range=250-350 ℃.

6. Lubricating oil

Used for engine lubricants, greases, and other lubricants, liquids, long chain (20-50 carbon atoms) alkanes, cycloalkanes, and aromatic hydrocarbons, boiling range=300-370 ℃. 7. Heavy oil or fuel oil

Used as industrial fuel; Raw materials for manufacturing other products, liquids, long chain (20-70 carbon atoms) alkanes, cycloalkanes, and aromatic hydrocarbons, boiling range=370-600 ℃.

8. Residual oil

Coke, asphalt, tar, and wax; Raw materials for manufacturing other products, solid, polycyclic compounds with carbon atom numbers greater than or equal to 70, boiling range=above 600 ℃. Crude oil is divided into different straight run fractions according to the boiling point requirements of different products, and then non ideal components are removed from these fractions according to the quality standards of the products;

By chemical reaction transformation, the required components are generated, resulting in a series of qualified petroleum products.

The commonly used processes for petroleum refining include atmospheric and vacuum distillation, catalytic cracking, delayed coking, hydrocracking, solvent deasphalting, hydrofining, and catalytic reforming.

Atmospheric and vacuum distillation products: naphtha, crude diesel (gas oil), residual oil, asphalt, and vacuum line.

Catalytic cracking products: gasoline, diesel, slurry (heavy distillate oil), liquid propylene, liquefied gas; Gasoline accounts for 42%, diesel accounts for 21.5%, propylene accounts for 5.8%, liquefied gas accounts for 8%, and oil slurry accounts for 12%.

The main products of delayed coking include wax oil, diesel, coke, and crude gasoline.

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