Vacuum Degassing Machine

A vacuum degassing machine removes dissolved and entrained gas from liquid fertilizer before the product goes to storage or filling. Air trapped in a batch can cause foam in the tank, false volume readings, oxidation of sensitive ingredients, pump cavitation, and inconsistent fill weights. Degassing before packaging gives the product a cleaner, more stable state for storage, transport, and use.

LANE Machinery supplies continuous vacuum degassing machines for liquid fertilizer production, with thin-film spreading inside a vacuum chamber, positive displacement feed, controlled discharge, PLC operation, and stainless steel construction. The machine can be integrated between homogenization and storage, or between storage and filling.

Product Overview

The LANE vacuum degassing machine is a continuous deaerator built for fertilizer liquids with varying viscosity, solids content, and foaming behavior. It pulls a vacuum over a thin layer of product so dissolved gases escape quickly, then transfers the degassed liquid to the next stage without exposing it to air.

The machine is supplied as a closed stainless steel system with:

• Vacuum chamber and rotating spreading disc or thin-film distributor.
• Vacuum pump and control valves.
• Feed pump and discharge pump.
• Level control and PLC interlocks.
• Optional CIP connections and inert gas blanketing.

The system is designed for water-soluble fertilizers, liquid NPK, organic liquid fertilizers, suspension products, and micronutrient solutions. Capacity and material selection are matched to the product and production rate.

Features and Advantages

Continuous thin-film degassing

• Product is spread into a thin layer inside the vacuum chamber to maximize gas release.
• Continuous operation avoids batch dead time between mixing and filling.
• Feed and discharge are balanced so production does not stop during degassing.
• Consistent vacuum conditions give repeatable results from batch to batch.

Lower foam and air content

• Removes entrained air before filling, so foam is less likely to form in the dosing system.
• Reduces air pockets that cause false volume readings in storage and filling.
• Helps prevent pump cavitation and unstable flow to the filling machine.
• Supports consistent density for products sold by weight.

Protection against oxidation

• Vacuum processing removes oxygen that can react with sensitive fertilizer ingredients.
• Inert gas blanketing can be added at discharge to keep air out during storage.
• Closed design limits contact between the product and the plant atmosphere.
• Helps preserve the quality of chelates, organic compounds, and sensitive additives.

Corrosion-resistant construction

• SS304 or SS316L contact parts for fertilizer chemistry.
• Corrosion-resistant seals, gaskets, and vacuum components.
• Mechanical seals on pumps matched to the product.
• Optional higher alloy materials for aggressive formulations.

PLC control and line integration

• PLC and HMI control vacuum level, feed rate, discharge rate, and alarms.
• Level interlocks protect the vacuum pump from liquid carryover.
• Can be connected to mixing, storage, and filling line signals.
• Recipe storage supports different products and viscosity ranges.

Cleanability and serviceability

• Manual rinse and CIP options for changeover between formulas.
• Accessible inspection ports and removable internals.
• Spare parts, operator training, and overseas commissioning support.
• Five-year warranty under the LANE equipment contract.

Working Principle

The vacuum degassing machine operates continuously:

1. Liquid fertilizer is pumped from the mixing tank, reactor, or storage tank into the vacuum chamber.
2. A rotating disc or distributor spreads the product into a thin film inside the chamber.
3. The vacuum pump lowers the chamber pressure so dissolved and entrained gas escapes from the liquid surface.
4. The degassed product collects at the bottom of the chamber and is transferred by the discharge pump to storage or filling.
5. Vacuum level and product level are monitored by the PLC and kept within the operating range.

The thin-film step is important because gas removal depends on surface area and contact time. A thin layer lets gas escape quickly while the product remains in motion, which makes continuous degassing practical for fertilizer lines that run for hours.

The system is closed from inlet to outlet. This limits oxygen pickup during processing and keeps the degassed product from being re-aerated before filling.

Application in a Liquid Fertilizer Production Line

The vacuum degassing machine is placed at the transition between product preparation and packaging:

Mixing tank or reactor -> Homogenizer -> Vacuum degassing machine -> Storage tank -> Filling machine -> Capping -> Labeling

In this configuration:

• The mixing tank or reactor produces the liquid fertilizer batch.
• The homogenizer improves particle dispersion and product stability.
• The vacuum degassing machine removes gas before long storage or direct filling.
• The storage tank holds degassed product under controlled conditions.
• The filling machine doses the product without foam-related volume errors.

LANE supplies the degassing machine as a single unit or as part of a complete liquid fertilizer production line with mixing, reaction, fermentation, homogenization, filtration, storage, filling, and packaging systems.

Application Scope

• Water-soluble NPK and foliar liquid fertilizers.
• Liquid NPK blends with dissolved salts and chelates.
• Organic liquid fertilizer and biofertilizer.
• Suspension fertilizers with solids content.
• Chelated micronutrient solutions sensitive to oxidation.
• Products measured and sold by volume or weight where air causes errors.
• Fertilizer plants with filling machines that struggle with foam or inconsistent flow.

Technical Specifications

Quality, Standards, and Certification

LANE manufactures vacuum degassing machines under an ISO 9001 quality management system and can supply CE-certified equipment. Pressure and vacuum components follow standard engineering practice, and materials are documented with certificates for traceability.

For liquid fertilizer products exported to the European Union, the final product must meet Regulation (EU) 2019/1009 requirements. LANE recommends independent certification of the final fertilizer product and confirms that process equipment is suitable for the intended product chemistry.

Why Choose LANE Machinery

Henan Lane Heavy Industry Machinery Technology Co., Ltd. is a fertilizer equipment manufacturer with more than 20 years of engineering experience. LANE has delivered equipment and production lines to clients in more than 50 countries and supplied machines for a 100,000 tons per year national fertilizer project in Africa.

LANE provides one-stop service from process layout and machine selection to overseas installation, commissioning, operator training, remote video guidance, and after-sales support. Our engineers review your product viscosity, solids content, foaming behavior, capacity, and downstream filling equipment, then recommend the correct degassing configuration.

Frequently Asked Questions

Why does liquid fertilizer need vacuum degassing?

Liquid fertilizer can contain dissolved and entrained air from mixing, pumping, and handling. That air causes foam, oxidation, false volume readings, pump cavitation, and unstable filling. Vacuum degassing removes the gas so the product is more stable and consistent.

What is the difference between degassing and deaeration?

The terms describe the same process. Degassing refers to removing dissolved gas, while deaeration specifically refers to removing air or oxygen. Both are performed by exposing a thin layer of product to vacuum.

Can the machine handle suspensions with solids?

Yes, within the limits of the pump and distributor design. LANE confirms the solids content, particle size, and viscosity with the customer before recommending the machine. The feed and discharge pumps are selected for the actual product.

Where should the machine be installed in the production line?

The usual position is between homogenization and storage, or between storage and filling. This removes gas after the last mixing step and before the product is measured, packaged, or held for long periods.

How much gas can be removed?

The result depends on product viscosity, temperature, vacuum level, and residence time. The system is designed for continuous removal of entrained and dissolved gas, and LANE confirms the expected degassing performance with your product sample before delivery.

Does degassing change the fertilizer formula?

No. The machine removes gas, not water or fertilizer components under normal operating conditions. Condenser and control settings are configured so moisture loss stays within your specification.

How is the machine cleaned between products?

The contact parts are accessible for manual rinsing, and CIP connections are available for automated cleaning. Quick inspection ports make it easier to verify that the chamber, disc, and pump internals are clean.

What support does LANE provide?

LANE provides a five-year warranty under the equipment contract, spare parts support, operator training, and overseas installation and commissioning services. Remote video guidance is available during commissioning and after-sales troubleshooting.

Get a Quote for Your Vacuum Degassing Machine

Tell LANE your product type, viscosity, solids content, capacity, and how the product is stored or filled today. Our engineering team will recommend the degassing configuration and integration plan, then provide a technical data sheet and quotation.