Main Application Scenarios of Water Jet Vacuum Pumps

Water jet vacuum pumps primarily rely on high-speed water flow to generate vacuum pressure for extracting gases. They are widely used across various industrial fields due to their simple structure, no moving parts, corrosion resistance, and ability to handle wet and dusty gases. Below are their main application scenarios categorized by industry:

1. Chemical and Petrochemical Industry (Most Extensive Application)

Vacuum distillation/rectification: Low-temperature separation of heat-sensitive materials (e.g., solvents, fragrances, essential oils).

Vacuum crystallization: Crystallization processes in salt production, sugar refining, fertilizers (e.g., KCl), and dye intermediates.

Material conveying: Vacuum suction and conveying of powders and granules, preventing dust dispersion.

Degassing and dewatering: Removing dissolved oxygen or other gases from liquids to improve product purity.

Reactor evacuation: Creating low-pressure environments for chemical reactions.

2. Food and Pharmaceutical Industry (Sanitary/Grade Applications)

Vacuum concentration: Low-temperature concentration of fruit juices, dairy products, herbal extracts, and vitamins to preserve flavor and active ingredients.

Vacuum drying: Drying of milk powder, yeast, and biological preparations to avoid thermal degradation.

Vacuum packaging: Oxygen-removal packaging for food and pharmaceutical products to extend shelf life.

Pre-vacuum for freeze drying: Providing fore-vacuum for freeze dryers.

Deodorization: Removal of off-odors from edible oils and condiments.

3. Power Industry

Condenser evacuation: Startup evacuation and maintenance of vacuum in steam turbine condenser systems at thermal power plants (often using multi-stage series configurations).

Vacuum deaeration: Deaeration treatment for boiler feedwater systems.

4. Environmental Protection and Wastewater Treatment

Biogas extraction: Suction and conveyance of biogas from landfills and anaerobic digesters.

VOCs recovery: Vacuum absorption recovery of organic solvents from chemical exhaust gases.

Sludge dewatering: Vacuum-assisted sludge extraction for filter press dewatering.

Exhaust gas scrubbing: Treating acid gases (e.g., SO₂, HCl) in combination with absorption towers.

5. Metallurgy and Materials Processing

Molten steel degassing: Improving steel purity (auxiliary in VD/VOD processes).

Vacuum brazing/sintering: Creating oxygen-free environments for welding or sintering.

Thin-film coating assistance: Providing fore-vacuum for PVD/CVD equipment.

6. Paper and Textile Industry

Vacuum dewatering: Dewatering at paper forming sections and water absorption after fabric coating.

Pick-up systems: Transferring paper from the wire section to the press section.

7. Laboratory and Small-Scale Production

Vacuum filtration: Buchner funnel filtration in chemical laboratories.

Rotary evaporators: Replacing mechanical vacuum pumps, resistant to solvent corrosion.

Low-temperature concentration: Concentration of biological samples and extracts.

8. Marine and Offshore Engineering

Bilge drainage: Extracting oil-water mixtures from ship bilges.

Vacuum toilet systems: Vacuum collection systems on ships and high-speed trains.