Zhongyu Instrument is a technology entity enterprise that integrates research and development, design, production, and customized synthesis of extraction towers for atmospheric and vacuum stainless steel distillation units. It specializes in designing and manufacturing comprehensive needs for various stages of production from small-scale, pilot to large-scale production for higher education institutions and research institutes in industries such as petroleum and petrochemical, chemical, coal chemical, energy and environmental protection, and pharmaceuticals. It is a professional company that designs and manufactures micro reactors, small-scale, pilot devices, as well as mold and small-scale industrial devices.





Zhongyu Instrument Atmospheric and Vacuum Stainless Steel Distillation Unit Extraction Tower
The following isSpecific parameters and design specifications of atmospheric and vacuum stainless steel distillation unitIntegrate industrial grade safety standards and process requirements, suitable for continuous production in fields such as petrochemicals and pharmaceuticals
1、 Core design parameters
| parameter category |
Normal pressure condition |
Reduced pressure condition |
Technical Specification |
| design pressure |
0.1~0.3 MPa |
-0.1~0.01 MPa(Gauge pressure) |
The vacuum section must comply with ASME BPVC VIII-1 standard |
| design temperature |
-20~350℃ |
-20~300℃ |
316L stainless steel endurance limit (short-term 400 ℃) |
| Tower diameter/tower height |
DN800~DN3000 |
DN600~DN2500 |
Tower height 15-50m (calculated based on theoretical number of plates) |
| Number of theoretical boards |
30-60 yuan |
40-80 yuan |
Under reduced pressure, HETP decreases by 20-30% |
| material |
316L stainless steel(Subject) |
+ Zirconium lining material(Strong corrosion system) |
Sealing element: flexible graphite+metal wrapped gasket |
2、 Key operational indicators
| system |
parameter range |
| processing power |
1-50 t/h (crude oil)/0.5-10 t/h (fine chemical industry) |
| temperature control |
-Tower kettle: steam heating (0.6-1.3 MPa saturated steam) -Side line extraction: PID temperature control ± 2 ℃ |
| vacuum system |
Three stage steam jet pump (ultimate vacuum 0.5kPa) or liquid ring pump+Roots pump set (ultimate vacuum 0.1kPa) |
| reflux ratio |
Automatic adjustment range 1:1~10:1 (accuracy ± 1%) |
Zhongyu Instrument Atmospheric and Vacuum Stainless Steel Distillation Unit Extraction Tower
3、 Separation performance validation data
| system |
Atmospheric pressure separation effect |
Decompression separation effect(10 kPa) |
test conditions |
| Crude oil atmospheric distillation |
Gasoline section: Initial boiling point -180 ℃ |
- |
ASTM D86 standard |
| Lubricating oil vacuum distillation |
- |
Distillation range: 350-500 ℃ |
Residual carbon ≤ 0.1% |
| Styrene ethylbenzene |
Purity ≥ 99.5% |
Purity ≥ 99.8% |
Tower top temperature 80 ℃ (depressurization) |
4、 Safety and Control System
| module |
Configuration Details |
| Explosion-proof design |
-Explosion proof membrane (bursting pressure 0.3MPa) -Static grounding resistance of tower body ≤ 4 Ω -Ex d IIC T4 Explosion proof Certification |
| Interlocking protection |
Five fold safety linkage: 1. Emergency release of overpressure 2. Cut off heating when the liquid level is low 3. Vacuum failure and nitrogen filling |
| automated system |
DCS control: -Pressure/temperature/liquid level three impulse regulation -OPC protocol integration into MES system |
5、 Comparison of industrial grade model parameters
| model |
Atmospheric tower (AT-1200) |
Pressure reducing tower (VT-1800) |
Integrated atmospheric and vacuum tower (CDU-2500) |
| Tower diameter/tower height |
DN1200×28m |
DN1800×36m |
DN2500 × 45m (Twin Tower Integration) |
| Number of theoretical boards |
40 floating valve trays |
60 tongue shaped tower plates |
Normal pressure section 35+pressure reduction section 50 plates |
| design pressure |
0.3 MPa |
-0.098 MPa |
Normal pressure section 0.3MPa/depressurization section -0.1MPa |
| processing capacity |
15 t/h (crude oil) |
8 t/h (residual oil) |
30 t/h (full fraction) |
| reference price |
¥1,200,000 |
¥1,800,000 |
¥3,500,000 |
Selection Recommendation
Refining atmospheric distillationAT-1200 (floating valve tray, high flux)
High boiling point materialVT-1800 (tongue shaped tray, pressure drop ≤ 0.3kPa/plate)
Full process integrationCDU-2500 (atmospheric and vacuum coupling, energy saving 15-20%)