Inerting, Purging, Sparging

Blanketing with Nitrogen, a safe and dependable method for storing highly volatile substances or substances prone to oxidation.

Blanketing with Nitrogen

A safe and dependable method

When storing highly volatile substances or substances prone to oxidation, safety and product preservation are of paramount importance. Blanketing with nitrogen is a safe and dependable method for constantly maintaining a protective layer of gas on top of the substance.


Humid air in the head space is replaced by high purity, inert and totally dry nitrogen. A precise valve control system ensures that as the tank is filled or emptied, the nitrogen content is automatically compensated to maintain the protective blanket.


The result is safety, reliability and protection from degradation through oxidation.


For vessels often used in batch processes, characterized by cyclic filling and emptying, we have developed special inert gas sluices which prevent the entry of oxygen effectively.

Blanketing of Food

Raising product quality and safety standards through blanketing

Oxidation is a chemical reaction where atmospheric oxygen in the air surrounding food and drinks attacks the product. The attack can take place at or below ambient temperatures (i.e. during normal storage of beverages, oils, fruit & vegetables or finished food products). It can also occur at elevated temperatures, such as during processing or deep-fat frying.

Help from Linde LienHwa

We deliver food-grade nitrogen and other inert gases to avoid or minimize the effects of oxidation. Nitrogen is used, for example, to keep oxygen levels in and around the product low. An inert atmosphere stabilizes the product and increases shelf life.

Blanketing is one of the 3 main inerting applications to combat the oxidation challenge.

The air in the empty or headspace around a product can contain moisture and oxygen. But you can replace this air with high-purity nitrogen, which is completely dry and inert – so it does not react with the product. This is a safe and reliable way to protect food from degradation as a result of oxidation.


We also deliver high-precision valve control systems to fill or empty food tanks or containers. These valves automatically adjust the nitrogen content to maintain a constant protective blanket. Nitrogen blanketing is ideal for tanks holding process and finished oils.

Purging

Safe and efficient cost effective purging

The atmosphere within process areas – for example in reactors – can be efficiently and cost-effectively purged of oxygen and moisture at start-up or shut-down using gaseous liquid nitrogen (GAN).


Filling and purging of plants with this dry gas is fully controllable. No pumps are needed so the risk of sparks and ignition or cross-contamination is eliminated.


What's more, the use of nitrogen ensures 'no reaction' either with the substance previously stored or the next one in the process flow.

Safety – the number one priority

Our unique safety system provides a secure platform for evaluating the flammability properties of a great number of gases, vapours and mixtures.


PC-based software enables our application engineers to show you how to reduce shut-down and start-up time.

When you partner with Linde Lienhwa, you can rely on us for a full-service offering comprising:

  • Safety analysis with our safety system
  • Tests and feasibility analyses
  • Development of a tailored solution
  • Advice on the most economical inert gas supply scheme to meet your purity specifications
  • Ready-to-run service comprising hardware, installation and start-up.

Purging of Foodstuffs

Raising product safety standards and quality through purging foodstuffs and beverages

Oxidation is a chemical reaction where atmospheric oxygen in the air surrounding food and drinks attacks the product. The attack can take place at or below ambient temperatures (i.e. during normal storage of beverages, oils, fruit & vegetables or finished food products). It can also occur at elevated temperatures, such as during processing or deep-fat frying.

How Linde Lienhwa Can Help

We deliver food-grade nitrogen and other inert gases to avoid or minimize the effects of oxidation. Nitrogen is used, for example, to keep oxygen levels in and around the product low. An inert atmosphere stabilizes the product and increases shelf life.

Purging is one of the 3 main inerting applications to improve product quality and longevity

Through purging, a gas such as nitrogen, carbon dioxide or argon is added to or bubbled through a food or beverage to displace atmospheric gases and replace them with an inert atmosphere. This preserves food quality by eliminating undesirable substances, thus inhibiting and reducing undesirable chemical reactions with oxygen.

Sparging

Oxygen removal through nitrogen injection

When nitrogen is injected into liquids in the form of tiny bubbles, oxygen can be effectively removed. This method affords excellent control and does not introduce any other substance into the liquid.


In addition, sparging with nitrogen is fast, effective and can be flexibly introduced to the process environment.