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Vacuum Systems
Vacuum Systems and Applications
Packaged liquid ring vacuum systems integrating pump/compressor, gas-liquid separator, heat exchanger and skid in open- or closed-loop circulation, applied across power, pharmaceutical, paper, petrochemical and food industries including flare-gas recovery and brewing duties.
Selection support
- Share flow rate, pressure, medium, temperature and material requirements.
- We can support pump selection, dosing package configuration and spare parts matching.
- Detailed English datasheets and quotations are available for priority models on request.
Technical details
1. System composition:
Liquid ring vacuum pump and compressor, gas-liquid separator, heat exchanger, common baseplate and internal piping.
2. Working principle:
The extracted gas enters the vacuum pump/compressor through the suction port. After being compressed by the pump/compressor, it enters the gas-liquid separator together with part of the working liquid. The two phases are separated in the separator, the gas is discharged through the exhaust port, and the working liquid is drawn back into the pump/compressor through the heat exchanger for recirculation.
Open-loop circulation: the water discharged by the liquid ring vacuum pump enters a large recirculation pool or is discharged directly. This water supply and drainage method is convenient and simple, and is widely used in practice.
Closed-loop circulation: if the extracted medium contains organic solvents, toxic substances, etc., water discharge creates significant environmental pressure and the extracted organic solvents are hard to recover and thus wasted; an increasing number of chemical and pharmaceutical enterprises therefore adopt closed-loop systems.
3. Application fields:
Power industry: condenser evacuation | vacuum water lifting | flue-gas desulfurization | fly-ash conveying | turbine seal-pipe venting | vacuum exhaust | geothermal gas extraction
Pharmaceutical industry: drying | reproduction/reactor drying | distillation | degassing | crystallization/vaporization | filling and/or material transfer
Packaging industry: vacuum packaging and modified-atmosphere packaging (MAP) | PET container production
Mining industry: vacuum filtration | multi-effect dewatering | exhaust-gas recovery | gas extraction | mine natural-gas boosting | coal-bed methane recovery | biogas recovery
Pulp and paper production: black-liquor evaporation | coarse-pulp washers | lime mud and filters | sediment filters | vacuum dewatering machines | raw-material and white-water degassing systems | stock-box compressors/vacuum pumps | suction boxes | couch rolls | pick-up and transfer rolls | vacuum presses | felt suction boxes | blow boxes
Plastics industry: extruder degassing | calibration tables (profiles) | pneumatic conveying | vinyl chloride gas extraction and compression
Medical devices: steam sterilization | central vacuum systems
Environmental industry: wastewater treatment | biogas compression | vacuum priming | biogas production | wastewater purification/activated-sludge tank aeration | fish-pond aeration | landfill-gas recovery (biogas) | biogas recovery | waste treatment machines
Marine industry: condenser venting | central vacuum priming | turbine seal-pipe venting
Petrochemical/chemical industry: gas recovery | flare-gas recovery | gas boosting | enhanced oil recovery | gas collection | crude-oil stabilisation | crude-oil vacuum distillation | exhaust compression | vapor recovery/gas boosting | filtration/dewaxing | tail-gas recovery | polyester production | PVC production | chlorine packaging | others
Facility services: waterway corrosion protection | central vacuum cleaning systems
Metallurgical industry: steel degassing
Sugar industry: CO2 preparation | sludge filtration | applications in evaporators and vacuum filters
General industry: central vacuum processing systems | compressed-air regeneration | vacuum cleaning machines | lifting and holding in position | vacuum degassing | vacuum milking | ozone production | brick plants
Food and beverage industry: mineral-water degassing | salad-oil and fat deodorization | tea and seasoning sterilization | sausage production | ham production | tobacco-product moistening | vacuum evaporators
Wood processing industry: holding and gripping | timber drying | timber preservation | log impregnation
4. Application cases:
1. Application of the vacuum pump/compressor in flare-gas recovery
Across the industry, environmental regulations require clean production of energy fuels, and existing and new refineries need to upgrade their systems and operations to reduce emissions of nitrogen oxides, sulfur compounds and the greenhouse gas carbon dioxide. Flammable gases are released through processes and normal operation; before the flare, the gas is collected at the end of the pipeline and sent to a recovery unit. Because the recovered gas is used as flare gas, flare-gas recovery greatly reduces exhaust emissions. The liquid ring compressor is the ideal technology for flare-gas recovery or degassing. Flare gas contains liquid, dust and dirty particles. During compression the gas temperature is almost constant because of the full contact between gas and working liquid. The liquid ring compressor can tolerate wet reactants and easily handle contaminated media, whereas other mechanical compressors are easily damaged.
Simplified process flow diagram of flare-gas recovery
Process steps:
- A — Vacuum distillation: distils different products according to the differing boiling points of the components in hot crude oil.
- B — Coking: breaks large molecules into small ones and collects the exhaust gas for recovery.
- C — Hydrocracking: same process as B, using hydrogen.
- D — Catalytic cracking: same process as B, using a catalyst.
- E — Flare-gas recovery, amine treatment: exhaust gas is collected, sulfur compounds are removed in amine treatment, and the gas is reused as fuel gas.
- F — Sulfur recovery unit: H2S is converted to sulfur in the reaction process.
2. Application of the vacuum pump in the brewing industry
Beer brewing process flow diagram
