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This project adopts the production method of combining thin film evaporation and distillation column under high vacuum condition to remove the heavy component waste oil into crude oil. In the gas phase oriented cracking column, the crude oil is cracked to produce diesel oil through a series of later refining, and qualified diesel products are produced to meet the use standards.
The process includes high vacuum film evaporation Anti-coking technology, the gas phase directed cracking technology, fractional column, rectifying column, Pyrolysis of waste engine oil or heavy oil from long carbon chain (C22-C40) to hydrocarbon (C12-C18) in diesel group. The obtained diesel index are accord with GB19147 standard and have high cetane number characteristics.
Refining process
Refining consists of two parts: degumming and liquid catalyst.
1. Product program
The product scheme of the plant is light component oil diesel - vacuum residue scheme.
The main products are as follows：
Light component oil ---- fuel oil mix
Diesel ----- Finished diesel
Vacuum residue waterproof additive or cracking raw material (cracking as fuel oil)
Raw materials and products
1.Material properties
The raw material is waste oil provided by the customer. The basic data is as follows:
| Item | Test Numerical value | Standard |
| Appearance | Dark black | Visual test |
| Smell | Gasoline diesel and burnt smell | Nasal smell |
| Density（20℃）/kg*m-3 | 880.7 | GB/T 1884——92 |
| viscosity（40℃）/mm2*s-1 | 67.28 | GB/T 265——88 |
| viscosity（100℃）/mm2*s-1 | 14.23 | GB/T 265——88 |
| Acid value/mg*g-1 | 1.61 | GB/T 7304——83 |
| Residual carbon mass fraction/% | 1.76 | GB/T 268——87 |
| Ash mass fraction/% | 0.78 | GB/T 508——85 |
| Pour point/mg*g-1 | -24 | GB/T 3535——83 |
| Open flash point/℃ | 192 | GB/T 3536——88 |
| Moisture mass fraction/% | 0.1 | GB/T 260——88 |
| Mechanical impurity mass fraction/% | 0.23 | GB/T 511——88 |
| Sulphur content/mg*kg-1 | 4040 | GB/T 387——90 |
| Nitrogen content/mg*kg-1 | 1692 | GB/T 9170——88 |
| Pentane insoluble mass fraction | 14.1 | Gb/T8926A |
Waste oil composition：
| Saturated hydrocarbon/% | Mononuclear aromatics/% | Bicyclic aromatic hydrocarbon /% | Polycyclic aromatic hydrocarbons - polar compounds /% |
| 75-79 | 13 | 3.5 | 6.5 |
Saturated hydrocarbon classification：
| alkane/% | cycloakane | |||
| 1cycle/% | 2 cycle/% | 3 cycle/% | 4 cycle/% | |
| 27 | 27 | 18.5 | 12 | 15 |
The physical composition of waste lubricating oil is complex, and it has the properties of high temperature coking and heat sensitivity.
2.Product and by-product summary
The main products of this project are diesel, and the product results are as follows：
Product distribution：
| No. | Item | Oil yield | Usage |
| 1 | Diesel | 85% | * Gas station blending |
| * Diesel car are used | |||
| 2 | Residual oil | 12% | * Cracking materials |
| * Water-proof material | |||
| 3 | Non-condensable oil | 3% | * It can be used as fuel by gas spray gun. |
| * Excess waste gas can be stored through a storage system. |
12% Overview of residue decracking products：
| Item | Yield |
| Cracking oil materials | 75% |
| Residual | 20% |
| Non-condensable gas | 5% |
3. Product feature
Diesel:（Different regional raw materials, the results will be different）
| Item | Unit | Data |
| Density（20℃） | Kg/m3 | 830.6 |
| Flash point | ℃ | 55-60 |
| Acid value | mgKOH/ml | 0.07 |
| Viscosity mm2/s | mm2/s | 4.6 |
| Cetane number | ＞55 | |
| Moisture | no | |
| Mechanical impurities | no | |
| sulphur（mass fraction） | mg/mg | 0.03% |
Gas phase pyrolysis distillation data：
| Distillate mass/% | Detection of distillation temperature of gas phase cracking oil /℃ |
| Initial boiling point | 84 |
| 5 | 156 |
| 10 | 170 |
| 50 | 289 |
| 90 | 326 |
| 95 | 335 |
| Dry point of distillation | 342 |
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Wanrong Environmental Protection Technology Co., Ltd, is occupied in Petroleum refining, Pro-Environment, Chemical Technical Application, Technical Research and Development of the Project. Project design Equipment manufacturing and sales.
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