Refinery desulfurization unit introduction:
At present, the crude oil extracted from many oil fields has many impurities, high sulfur content, poor fluidity and low api value, which seriously affect the transportation and refining of these heavy crude oil. Based on this, we have designed a negative pressure gas desulfurization device for oil field exploitation, which can purify the extracted heavy crude oil into a sulfur content of 0.2% through the technology described below. api reaches more than 40 light crude oil for easy transportation and refining.
1. Product Introduction
This integrated petroleum refinery line adopts atmospheric & vacuum continuous distillation plus catalytic refining & desulfurization process. It processes crude oil, heavy oil and waste engine oil into gasoline, diesel, kerosene and asphalt. We provide mini, medium and large capacity solutions with full turnkey overseas plant construction, ideal for resource-rich countries in Central Asia, Africa and Southeast Asia.
2. Process Flow
Raw material pretreatment → heating distillation → atmospheric fractionation → vacuum deep cutting → catalytic hydrogenation → decolorization & desulfurization → cooling & storage → finished oil fillingFull supporting heat exchange, condensation, waste gas purification and safety pressure relief auxiliary systems for sealed clean production.
3. Application
Crude oil refinery, waste oil recycling plant, mine fuel self-supply station, petrochemical factory, asphalt production base.
4. Supply Scope
Distillation tower, heating furnace, condenser, reactor, explosion-proof PLC control cabinet, pumps & valves, environmental desulfurization unit, pipelines, installation drawings & operation manuals.
5. After-sales Support
Free factory layout design; overseas engineer on-site installation & commissioning; 7-15 days operator training; 1-year main unit warranty; lifelong spare parts supply & technical upgrade service.
Table 1-1 Raw material specifications | Name of raw material | Item | Unit | Index |
| Raw oil | Water bearing | % | ≯2.0 |
| Stripped crude | saltiness | Mg/g | ≯3 |
| Water bearing | % | ≯0.3 |
Table 1-2 Main indicators of semi-finished products and finished products | Gasoline quality index: |
|
| Steam top gasoline dry point | ≯170ºC |
| Always top gasoline dry point | ≯170ºC |
| Regular first-line quality indicators: |
| 98% point | ≯260ºC |
| Flash point | >38 |
| Diesel quality index: |
| 95% point | ≯365ºC |
| 0# Diesel oil | Freezing point | 0±4ºC |
| -10# Diesel oil | Freezing point | -10±4ºC |
| -20# Diesel oil | Freezing point | -20±4ºC |
| Note: Freezing point and 95% point control one of them |
| Mixed wax oil index: |
| Carbon residue | ≯0.3 |
Table 1-3 Utilities (water, electricity, steam, wind, etc.) | Name | Requirement index |
| Circulating water temperature | ≤30ºC |
| Circulating water pressure | ≥0.4MPa |
| System steam pressure | 0.8~1.0 MPa |
| Instrument air pressure | ≥0.3MPa |
| Fuel oil pressure | ≥1.0MPa |
| High gas pressure | 0.2~0.5 MPa |
| Sealing pressure | ≥2.0MPa |
| Circulating cooling water: |
| Water supply temperature | ≤30ºC |
| Return water temperature | ≤40ºC |
| Water supply pressure | 0.35MPa |
| Backwater pressure | 0.20Mpa |
| PH value | 6~9 |
| turbidity | ≤2000mg/l |
| Fouling coefficient | ≤0.0004m2·h·ºC/kcal |
| Power: |
| High voltage | 6000V±10% |
| frequency | 50±1Hz |
| Low voltage | 380V/220V±5% |
| frequency | 50±1Hz |
| Instrument compressed air: |
| 0.4MPaG dew point | -20ºC |
| temperature | Normal temperature |
| stress | 0.4MPa |
Table 1-4 Raw material consumption, utility consumption, and energy consumption | NO. | Raw material name | Unit | QTY | Remark |
| 1 | Fuel oil + fuel gas | kg/h | 4605.75 |
|
| 2 | Electricity | KWh/h | 3673.8 |
|
| 3 | Circulating water | t/h | 1737 |
|
| 4 | Fresh water | t/h | 7.163 |
|
| 5 | Softened water | t/h | 19.902 |
|
| 6 | Sewage | t/h | 10.38 |
|
| 7 | 0.9Mpa steam | t/h | 7.609 |
|
| 8 | 0.3Mpa steam | t/h | 5.89 |
|
Table 1-5 Tower types | NO. | Process NO. | Device name | Specification and model | Structural form | Volume m3 | Operating pressure Mpa | Operating temperature ºC |
| 1 | T-701 | Primary still | ф3000*54154 | Strip float valve | 375 | 0.08 | 300 |
| 2 | T-702 | Atmospheric tower | ф3800*47758*16/18 | Strip float valve | 530 | 0.08 | 350 |
| 3 | T-203 | Decompression tower | ф6400/4200*35145 | filler | 908.2 | -0.093 | 440 |
| 4 | T-703 | Regular line stripper tower | ф1200*7502*10 | Float valve | 8 | 0.08 | 350 |
| 5 | T-704 | Normal two wire stripper tower | ф1200*6550*10 | Float valve | 8 | 0.08 | 250 |
| 6 | T-705 | Normal three wire stripper | ф1200*6000*12 | Float valve | 8 | 0.08 | 350 |
| 7 | T-101A | Dehydration tower | ф1200*6800*16 | Filler | 8.3 | 1.7 | Normal temperature |
Table 1-6 Types of heat exchangers | NO. | Process number | Device name
Crude oil/regular line | Specification and model | Shell pass medium | medium
Crude oil | stress Mpa | Stress Mpa |
|
| 1 | H-701A | Crude oil/normal top cycle | BES1000-4.0-265-6/25-4 | 16MnR | Crude oil | 2.3 | 1.5 |
| 2 | H-702A | Crude oil/normal third line | FB900-220-25-2 | 16MnR | Heavy firewood | 2.5 | 1.5 |
| 3 | H-703A | Crude oil/residual oil | FB700-125-25-2 | 16MnR | residuum | 1.8 | 2.3 |
| 4 | H-704A | Crude oil/Chang Yizhong | FB700-125-25-2 | 16MnR | Crude oil | 1.8 | 2.3 |
| 5 | H-705A | Crude oil/normal third line | FB700-125-40-4 | 16MnR | Heavy firewood | 2.3 | 2 |
| 6 | H-706A | Crude oil/Regular 2 middle | FB700-125-25-2 | 16MnR | Crude oil | 2 | 2 |
| 7 | H-709A | Head oil/Chang Erzhong | BES800-4.0-160-6/25-4 | 16MnR | Hair oil | 1.8 | 2 |
| 8 | H-712A | Crude oil/minus three lines | BES700-4.0-120-6/25-4 | 16MnR | Wax oil | 2.5 | 2 |
| 9 | H-714A | Crude oil/normal second line | BES1100-40-365-6/25-2 | 16MnR | medium | 2.3 | 2 |
| 10 | H-718A | Device name | FB700-120-25-4 | 16MnR |
| 2 | 1.8 |
| 11 | H-719A | Crude oil/minus three lines | FB1100-330-25-4 | 16MnR | Crude oil | 2 | 2 |
| 12 | H-721A | Pulling oil/reducing three lines | RBEU900-4.0-205-6/25-4 | 18-8 | Wax oil | 2 | 2.5 |
| 13 | H-727A | Minus four wire evaporator | FB1000-265-40-4 | 16MnR | Softened water | 2 | 0.9 |
| 14 | H-728A | Normal three wire cooler | FB700-125-25-4 | 16MnR | Heavy firewood | 1.5 | 0.5 |
| 15 | H-730A | Primary side cooler | FB700-120-25-4 | 16MnR | gasoline | 0.4 | 0.5 |
| 16 | H-731A | Minus one cooler | FB800-160-25-4 | 16MnR | Wax oil | 1.8 | 0.5 |
| 17 | H-732A | Often a line cooler | FB600-90-40-4 | 16MnR | Aviation fuel | 1.5 | 0.5 |
| 18 | H-733A | Normally two-wire cooler | FB700-120-25-4 | 16MnR | Diesel oil | 1.5 | 0.5 |
| 19 | H-735C | Reduced line cooler | FB700-125-25-2 | 16MnR | Wax oil | 1.8 | 1 |
| 20 | H-736ABC
DEFGH | Initial head air cooling | P9×3-4-3020/129-16Ra | 16MnR | Initial top oil vapor | 0.4 |
|
| 21 | H-737A | Cold after the first roof | FB1100-330-16-4 | 16MnR | gasoline | 0.4 | 0.4 |
| 22 | H-739 | Often head air cold | P9×3-4-3020/129-16Ra |
| Constant oil vapor | 0.4 |
|
| 23 | H-739 | Often head air cold | P9×3-6-196-16S-23.4/Ra |
| Constant oil vapor | 0.4 |
|
| 24 | H-739 | Often head air cold | P9×3-4-3020/128-16Ra |
| Constant oil vapor | 0.4 |
|
| 25 | H-740A | Often cold after top | FLB1100-360-16-4 | 16MnR | gasoline | 0.4 | 0.4 |
| 26 | H-740B | Often cold after top | FLB1100-360-16-4 | 16MnR | gasoline | 0.4 | 0.4 |
| 27 | H-741 | Often three air cold | SL9×3-4-2440/129-25Rb |
|
| 1.5 |
|
| 28 | H-743 | Reduced first line/crude oil | BES900-4.0-265-6/25-4 | 16MnR | Crude oil |
|
|
| 29 | H-230A | Reduced top cooler | FLB1100-350-16-4 | 16MnR | Diesel oil | 0 | 0.4 |
| 30 | H-231A | Reduced top primary cooler | FLB1100-350-16-4 | 16MnR | Diesel oil | 0 | 0.4 |
| 31 | H-232A | Reduced top two stage cooler | FLB1100-350-16-4 | 16MnR | Diesel oil | 0 | 0.4 |
Table 1-7 Pumps Device name
Crude oil pump | specification | Head m | Inlet pressure
MPa | Outlet pressure
MPa | medium
Crude oil | TemperatureºC | Flow rate m3/h | Speed r/m | Shaft power KW |
|
| Priming pump | 250Y-150×2A | 262 | 0.2 | 2.1 | Hair oil | 50 | 472 | 2950 | 488 |
| Normal bottom pump | 250AYS150×2A | 260 | 0.06 | 1.8 | Normal slag | 160 | 480 | 2985 | 430 |
| Primary top pump | 250YS150×2C | 190 |
| 1.45 | gasoline | 350 | 400 | 2950 | 269 |
| Slag pump | 100Y-120 | 123 | 0.08 | 1 | residuum | 30 | 100 | 2950 | 54.1 |
| Normal top pump | 65Y-100×2C | 125 |
|
| gasoline |
| 20 | 2950 | 20 |
| Normal top circulating pump | 80Y100B | 73 | 0.05 | 0.6 | gasoline | 30 | 40 | 2950 | 15.3 |
| Chang Yi Zhong pump | 150Y-150 | 150 | 0.2 | 0.64 | Light diesel oil | 90 | 180 | 2950 | 113 |
| Often two pumps | 150Y-150B | 110 |
|
| Light diesel oil |
| 155 | 2950 | 76 |
| Normal line pump | 150Y-150B | 110 |
|
| Aviation fuel |
| 155 | 2950 | 76 |
| Normally two-wire pump | 100Y120×2C | 150 | 0.15 | 1.39 | Diesel oil | 150 | 79 | 2950 | 55.5 |
| Device name | 100Y120×2C | 150 | 0.11 | 1.1 | medium | 250 | 79 | 2950 | 55.5 |
| Normal three-wire pump | 100AY120×2C | 150 | 0.06 | 0.65 | Heavy diesel oil | 330 | 79 | 2950 | 55.7 |
| Jacking oil pump | 50Y-60×2A | 105 | 0.11 | 0.95 | Coping oil | 20 | 12.5 | 2950 | 9.82 |
| Reducing line pump | 100Y120×2C | 105 | 0.21 | 1.65 | Wax oil | 80 | 79 | 2950 | 55.5 |
| Reducer pump | 200AY150 | 150 |
|
| Wax oil | 270 | 300 | 2950 | / |
| Reducing three wire pump | 250AYS150 | 150 |
|
| Wax oil | 320 | 500 | 2985 | 259 |
| Minus four wire pump | 80Y100×2A | 175 | 0.06 | 1.2 | Wax oil | 370 | 47 | 2950 | 44.8 |
| Reducing slag oil pump | 200×150R2DM | 300 |
|
| residuum | 370 | 300 | 2980 | 245 |
| Anti-viscosity slag oil pump | 200×150R2DM | 300 |
|
| residuum | 370 | 300 | 2950 | 245 |
| Viscosity reducing condensate pump | 50AY-35×5 | 190 | 1 | 4 | Condensed oil | 40 | 12.5 | 2950 | 15 |
| Constant furnace blower | G4-73-11No1190 | 0.35 |
|
| air | Normal temperature | 60100 | 1450 |
|
| Normal furnace induced draft fan | Y4-73-11No1290 | 0.16 |
|
| smoke | 120 | 89500 | 1450 |
|
| Reduced furnace induced draft fan | Y4-73-11No14135 | 0.163 |
|
| smoke | 120 | 89500 | 960 |
|
List of project construction and investment
| Order NO. | Device name |
| Phase I construction content |
| 1 | 1750000 tons / year atmospheric and decompression device |
| Phase II construction content |
| 4 | 1750000 tons / year atmospheric and decompression device |
| 5 | 250,000 tons / year (~ 150,000 tons / year) hydrorefining unit (hydrogenation pressure 16 Mpa) |
| 6 | 3000 Nm ³ / h methanol hydrogen production plant (local green methanol) |
| 7 | Heavy-oil deep-processing unit |
| Storage and transportation and auxiliary public works |
| 8 | Tank area (80,000 cubic meters) and loading and unloading vehicle facilities, wharf tank area 50,000 cubic meters, a total of 130,000 reserves |
| 9 | Supporting sewage treatment system, fire control system, heating system, flare system, air suppression nitrogen and other systems |
Common Faults, Causes and Simple Remedies of Petroleum Refining Production Lines
I. Heating Furnace / Conduction Oil System Faults
Slow temperature rise, insufficient heating
Reasons: Insufficient fuel supply, burner blockage, ash accumulation in the flue, failure of residual heat recovery, carbon deposition and coking of the conduction oil
Consequences: Incomplete distillation, chaotic oil fractions, decreased oil output rate
Smoke from the furnace, strong odor in the exhaust gas
Reasons: Inadequate combustion, failure of the desulfurization device, flue blockage
Leakage of conduction oil, sudden drop in pressure
Reasons: Corrosion of pipeline welds, aging of flange seals, cracking due to high temperature expansion
II. Distillation Tower Distillation System Faults
Cloudy top / side line oil output, blending of gasoline and diesel
Reasons: Temperature control malfunction, malfunction of the reflux valve, blockage of the tower packing, unstable vacuum degree
Insufficient negative pressure in the tower (reduced pressure tower)
Reasons: Leakage of the vacuum pump, poor cooling effect of the condenser, leakage at sealing points
Consequences: Heavy oil cannot be fully extracted, more residue oil, reduced profit fluctuation of the tower liquid level
Reasons: Unstable feed flow, failure of the liquid level transmitter, pump suction failure
III. Heat Exchange, Condensation and Cooling System Faults
Poor cooling effect, high temperature of finished oil
Reasons: Insufficient circulating cooling water, water scale / oil sludge accumulation on the tubes of the condenser, failure of the fan
Consequences: Oil and gas cannot be fully condensed, significant loss of exhaust gas leakage
Blockage of heat exchanger, sharp drop in heat exchange efficiency
Reasons: Accumulation of raw material impurities and gums, long-term lack of cleaning
IV. Pump, Valve Transportation Equipment Faults
Oil pump fails to draw in oil, fluctuating flow rate
Reasons: Low liquid level in the feed tank, blockage of the filter, air ingress in the inlet pipeline, leakage of the seal
Abnormal noise from the pump body, severe vibration
Reasons: Wear of the bearing, coking of the impeller, cavitation
Valve not closing tightly, internal leakage and material cross-contamination
Reasons: Wear of the valve core, gum blockage, resulting in mutual mixing of different oil types
Explosion-proof pump leakage of oil and gas
Safety hazard, prone to fire risk
V. PLC Explosion-proof Electrical Control Automatic Control System Faults
Distorted temperature and pressure display, frequent alarms
Reasons: Damage to thermocouples / pressure sensors, aging and short-circuit of lines under high temperature
Automatic interlock shutdown
Trigger conditions: Over-temperature, over-pressure, low liquid level, failure of vacuum, etc., safety protection activated
Control cabinet overheats and trips
Environmental high temperature, damaged cooling fan, overload of lines
VI. Environmental De-Sulfurization Exhaust Gas Treatment Faults
Yellow and black smoke in the exhaust gas, exceeding sulfur content
De-sulfurization liquid failure, clogging of spray nozzles, shutdown of the circulating pump
Oil accumulation in the exhaust gas pipeline blocking
Uncondensed oil adheres to the pipe wall, prone to spontaneous combustion over time
VII. Raw Material Pre-Treatment and Refining Unit Faults
Blockage of raw material feed pipelines
Accumulation of gum, sand and impurities in the filter of crude oil / waste engine oil
Poor de-colorization and de-sulfurization effect of the catalytic reaction vessel
Failure of catalyst, non-compliance with reaction temperature, failure of the stirring device
Deep color of the finished product, exceeding sulfur content
Imbalance in temperature and reagent ratio of the refining process
VIII. High-risk Safety-related Common Faults
System pressure surges abnormally, safety valves frequently activate
Minor oil and gas leakage in pipelines (flammable and explosive)
Corrosion and leakage of oil products in tanks and pipelines
Electrical safety lines aged and sparking hazards
Product Highlights：
1.High oil yield over 93%, high proportion of high-value gasoline & diesel, low residue loss
2.Modular split design, phased production, easy capacity expansion without full replacement
3.Full PLC automatic explosion-proof control, auto temperature & pressure interlock, less labor
4.Waste heat recovery heating system cuts energy consumption by 30%, matched desulfurization flue gas treatment
5.Multi-feedstock compatible: crude oil, heavy oil, waste engine oil, residual oil
6.Full turnkey service: site survey, process design, manufacturing, installation, operation training
7.Low sulfur refined oil meets international vehicle fuel standard
8.Standard spare parts, long maintenance cycle, easy daily repair
FAQ:
1.What is daily capacity? Can we customize output?
Standard 10 to 10000 TPD, customized capacity & layout based on your site and raw material reserves.
2.Can it process waste engine oil? What is oil yield?
Yes, suitable for crude oil and waste oil. Total crude oil yield Greater than or equal to 93%, waste oil diesel yield 78% to 83%.
3.Is the plant eco-friendly? Any pollution risk?
Equipped with desulfurization and waste gas recovery system, emission meets global environmental standards, fully sealed no leakage.
4.Does the package include full equipment & installation service?
Complete main and auxiliary machines included; we offer overseas on-site installation, commissioning and operator training.
5.Can the machine match local voltage 220V/380V/440V?
Control cabinet and motors can be customized to local voltage & frequency with explosionproof design.
6.Warranty period & spare parts supply?
12 months warranty for main units; standardized spare parts in stock with fast international delivery.
7.How much land does the refinery need? Can you provide layout drawing?
10TPD unit needs about 800 Square meter; free process layout and pipeline drawings supplied.
Factory scenes and photos of some equipment
