Industrial Utility Efficiency    

Technology

When users consider adding an oil free air compressor to their facility, there are several factors that should go into the decision to ensure it is the right equipment for the user’s operation. Some considerations and factors can include why to choose oil free to begin with; how to properly select and size the compressor; how to adjust sizing for different cooling water conditions or different ambient temperatures; and what it will take to maintain the compressor throughout its lifespan. To lay a foundation, it is important to first understand why oil free air is important, how compressed air is used and what options are on the market.

Air Compressors

Properly sizing a compressed air system can help determine if your facility has enough air to adequately supply your production equipment. Designing a cost effective system that minimizes any interruptions to productivity requires thoughtful planning and design. Typically, the desired outcomes of such a system focus on stable pressure and efficient operation, though it is important to note that each of these elements requires a unique solution. This article will provide guidance in proper selection considerations and suggest when a centrifugal air compressor may be ideal for your needs.

Air Treatment

This article is for you if your company is purchasing nitrogen gas at 99.999% purity and you’re not sure why.  While there are many applications which do require nitrogen gas concentrated to 99.999%, they are significantly outweighed by the applications that don’t. Rather than relying on a delivery of bulk liquid or pressurized cylinders, many nitrogen users are choosing to produce a custom supply of nitrogen within their facility, and they are doing it at a fraction of the cost. Over the past decade we’ve seen a mass industry shift from delivered nitrogen supply, to nitrogen generation.

Blowers

The plant upgrades, in combination with a progressive management strategy, allows the plant to consume less energy and reduce its reliance on outside contractors for biosolids removal, resulting in total operational savings of approximately $60,000 per year.  The plant is also positioned to efficiently manage the area’s wastewater for decades to come.

Compressor Controls

A large chemical plant in Celje, Slovenia, planned to retrofit a kiln used to produce titanium dioxide. To make space for the new equipment related to the retrofit, the plant needed to relocate its high-pressure compressed air system feeding an adjacent pressing process used to dry the material before firing it in the kiln. However, a comprehensive compressed air audit using cloud-based software showed the plant did not need to relocate the system.

Instrumentation

In manufacturing and packaging facilities that rely on pneumatics, there’s a four-letter word worse than virtually any other: leak. Unidentified air leakage and unexpected maintenance in pneumatic systems are significant sources of revenue and productivity loss but identifying the cause of leakages and preventing unforeseen downtime is typically a challenge.

Pneumatics

Electricity and compressed air play an important role in the thermal and kinetic processes for everything from mixing and extruding the ingredients, deep-freezing to -13°F (-25°C), dipping into various chocolate coatings through to final packaging. Energy efficiency is therefore right at the top of Unilever’s list of priorities. As part of the Unilever Sustainable Living Plan, this global corporation has succeeded in saving more than $186 million in energy costs from efficiency improvements in production alone since 2008.

Vacuum

It’s one thing to move materials during the production process, but when it’s a finished product on the packaging line, choosing the right material handling system is essential. Getting it wrong results in squandered production time when product loss occurs, and wasted raw materials.

Cooling Systems

A large manufacturer of consumer glassware products in the North East sought a solution for injecting cold compressed air into its refractory furnace. Doing so would minimize the internal corrosion thereby extending the life of the furnace lining and their annual maintenance interval. The manufacturer opted for a unique solution from Aggreko Engineering featuring a rental, oil-free rotary screw air compressor combined with a heat exchanger and chiller.  Installed in 2019, the solution is expected to save the company $9 million monthly given the ability to maintain extend furnace maintenance from one year to two years – and boost plant uptime.
The Wonderful Pistachios and Almonds campus in Lost Hills, California is a manufacturing facility that processes and packages pistachios and almonds for the consumer market. Food processing requires extensive use of compressed air to control multiple applications ranging from actuators, valves, optical sorters, packaging equipment and plant maintenance operations. The campus has its peak season during harvest in late August/early September, but processing and packaging operations take place year-round.
For decades, a major meat processor and packaging operation in Northern England did what many growing companies do when more compressed air is needed to meet demand: added another air compressor and then another air compressor and so on. Yet the company decided the strategy of adding equipment had run its course, especially given a positive outlook for continued growth and the need to resolve nagging issues with system downtime and compressed air quality.
One of the most satisfying parts of being a compressed air system auditor is resolving compressed air system reliability issues. This article exposes a seldom, if ever, mentioned problem that can occur when air dryers are dedicated to air compressors. It examines a real-world application and discusses the action taken to remedy the situation.
Moisture in compressed air is almost never a good thing. It can damage a compressed air system by causing corrosion, rust and scale buildup. It can damage downstream equipment with these moisture byproducts or with the moisture itself. It can negatively affect processes and products that require dry compressed air.
Industrial operations and manufacturers using pneumatics have access to more Industrial Internet of Things (IIoT) technology than ever before, from position sensors on cylinders to system flow sensors and edge gateways that operate independently from the machine controller with globally accepted communication protocols.
There are many critical components involved in rotary screw air compressors, and the lubricant we use is of vital importance in the process.  Screw machines rely heavily on these fluids for bearing lubrication, system cleanliness, water removal, sealing, as well as heat transfer. These fluids work in a very unforgiving environment and must function well in circumstances that would normally be deemed torturous in other lubricant applications. We run it at high velocities, through scorching temperatures, while we blast it with water.
The AZEK Company is a producer of durable and low maintenance building materials, and like many manufacturers, it found its compressed air system to be time consuming and expensive to keep maintained. But that changed after the company replaced its outdated and faulty compressed air system with a new design that includes technically advanced air compressors, dryers, receiver tanks – as well as controls to provide better control of the entire system and achieve optimal performance.
When an automotive company added a new 200-horsepower (hp) rotary screw air compressor and accompanying dryer to a satellite building at its Chicago-area assembly plant, it needed a cost-effective way to integrate the equipment into its existing compressed air network. Doing so would allow plant personnel to easily monitor the air compressor’s performance and ensure it operates in harmony with the plant’s centrifugal air compressors. Importantly, it would contribute to efficient and reliabile air compressor operation at all times.
A major automotive company needed a newer and more efficient compressed air system at one of its manufacturing plants. The original system had been operating inefficiently with old equipment and controls. Faced with a major capital investment, the plant switched to a performance contracting model. 
As founding members of a startup company in the compressed air and gas purification and separation industry, nano-purification solutions felt a kinship with the owners, employees and mission of Death Wish Coffee Co. The kinship and nano-purification solutions’ expertise in onsite nitrogen generation led to the installation of a nitrogen generation system that contributes to the overall efficiencies and operational costs savings at the coffee roaster’s production operation in Round Lake, New York.