Decompression
Go fossil-free with biogas from gas flares and a decompression unit
Go fossil-free with biogas regardless of access to gas networks
There is a growing demand from industries to move to sustainable solutions, and for many industries, this means switching from, for example, oil burning to fossil-free biogas. Biogas is a renewable energy source produced through the anaerobic digestion of organic matter and has several benefits. It helps reduce greenhouse gas emissions, is a local energy source and supports the circular economy by recycling waste and manure. Please read BioDiv Öst's excellent brochure "Biogas a good deal for your industry"
Even industries that do not have access to the national grid or a local biogas network can switch to biogas. This is made possible by using mobile gas cylinders filled with biogas. Since a filled gas cylinder can have a pressure of up to 250 bar and industrial burners usually require a pressure of less than 4 bar, we have developed a decompression module solution.
These decompression units can be tailored in size and capacity to the expected gas flow. During the decompression process, the endothermic energy of the gas decreases, making it very cold. Our decompression unit ensures that the gas is decompressed stepwise with a controlled heating between each pressurization step.
We offer container solutions in sizes from 10 up to 40 feet that include a separate electrical and boiler room as well as gas regulation space. For heating, we can choose between an electric or biogas boiler, depending on your needs. This means that industry can access a customized and sustainable solution for its energy needs, regardless of access to biogas networks.
Adapt the biogas supply to your needs
Realizing a transition to fossil-free biogas in your industry, especially when the local biogas grid is missing, requires more than just a decompression unit. You also need a reliable biogas supply. We at Processkontroll Green Technology make this possible with our mobile biogas trailers. These can be filled with up to 4 tons of biogas directly at the biogas producer and then transported safely to you, the end user. Read more about our mobile gas storage here.
For those with particularly high biogas needs, it may be more beneficial to consider energy-dense liquid biogas, also known as LBG or Bio-LNG. This gas is stored in large cryogenic tanks. We at Processkontroll Green Technology offer vaporization plants that regulate the gas flow exactly to your needs, ensuring a stable and efficient energy supply.
Examples of previously delivered decompression units
Here are some examples of substations that Processkontroll Green Technology has delivered over the years. These stations reflect our experience and commitment to providing customized and efficient solutions for our customers. To see a more complete list of our facilities, please visit our reference page. For further information on any of these projects, or if you are interested in finding out more about how we can provide a solution to suit your particular needs, please do not hesitate to contact us.
Decompression module for Biokraft Södertörn
In Södertörn, Processkontroll Green Technology has successfully completed the installation and commissioning of a state-of-the-art decompression unit for Biokraft.
This innovative solution, housed in a 20-foot container, represents part of our range of decompression modules and boasts a capacity of 1000 Nm3/h. By regulating compressed biogas from mobile gas flares, the unit plays a central role in Biokraft's - the company formerly known as Scandinavian Biogas - production of liquid biogas, LBG (Bio-LNG).
The process helps to supplement the gas flow from Biokraft's digestion plant to the liquefaction plant, facilitating a smooth and efficient production of LBG.
Delivering a "Usain Bolt decompression facility" that is on the starting block all year round
Over the years, we have delivered many decompression plants that have had the purpose of continuously feeding, for example, an industrial furnace with climate-friendly fossil-free biogas to replace, for example, oil as an energy source. What happens then is that the customer receives full biogas cylinders with pressures of 200-250 bar that need to be regulated down to the desired pressure, often only a few bars.
When compressing gas, the distance between the gas molecules decreases and the increased kinetic energy causes the gas to become hot and therefore the gas needs to be cooled between each compression step. In the case of depressurization, the opposite is true and we need to heat the gas between each depressurization regulator. This is what we solve with our decompression plants, where the gas is depressurized in a controlled manner and reheated between each stage. Of course, this task is made easier by the fact that a relatively even and continuous flow is usually desired.
When we commissioned our new decompression plant for Gasum in Nynäshamn before the summer, the conditions were completely different; instead of a continuous supply, the biogas would now serve as a back-up operation in the event of a power outage and reduce the risk of expensive restarts. We therefore had to design the plant to deliver gas at 37 bar pressure and a flow rate of 4000 kg/h within a few seconds. The flow itself is huge as it corresponds to two mobile gas cylinders per hour and the challenge of being able to start immediately all year round, posed great challenges for both our automation technicians and the gas boiler that is responsible for the controlled heating of the gas after each pressure reduction step.
Thanks to good planning and cooperation with the customer, we finished on time and now our "Usain Bolt" is standing in the starting blocks, waiting for the starting shot that may come tomorrow, maybe in a year. And all the time without getting cold or cramping.
Biogas decompression fries meatballs fossil-free
More and more people want to replace fossil fuels like oil with environmentally friendly biogas. We have developed decompression modules that enable a smooth transition to biogas, even for those without access to gas networks.
Our mobile gas cylinders are filled with biogas and the decompression unit lowers the pressure for use in various applications. We have recently commissioned a smaller decompression unit that will be used to fry meatballs with fossil-free biogas!
See our compact 10-foot container containing both control system, boiler and pressure regulation here
