Gas Separation Technology
Gas separation can refer to any number of techniques used to separate gases, either to give multiple products or to purify a single product. Removing liquids and solids from a gas stream is crucial in refining and processing gas applications. Effective contaminant removal can prevent costly problems and reduce downtime with downstream equipment like compressors, turbines, and burners. The operation of membrane systems is based on the principle of differential velocity with which various gas components permeate membrane substance. The driving force in the gas separation process is the difference in partial pressures on different membrane sides.
Our range of nitrogen generators includes cryogenic, adsorption, and membrane technologies. On-site gas generation is the best nitrogen supply mode for typical flow, pressure, and purity requirements.
With respect to the simplicity of the system, a nitrogen generator can be split into modules. This is in direct contrast to classical systems where the equipment is designed for a certain stage of the separation process. Using a modular system, the generation facility may be built from a selection of preexisting equipment and where necessary, the output capacity of a plant may be increased at the minimum cost. This option appears all the more useful where a project envisages a subsequent increase in enterprise capacity, or where demand may simply require on site production of nitrogen by employing equipment that is already present.
Gas separation units have no moving component parts, thus ensuring exceptional reliability. Membranes are highly resistant to vibration and shocks, chemically inert to greases, moisture-insensitive, and capable of operating a temperature range of –40°С to +60°С. With appropriate maintenance, the useful life of membrane units range between 130,000 and 180,000 hours (15 to 20 years) of continuous operation.
Among all the other nitrogen supply modes, industry veterans turn to membrane separators when in need of high purity, reliable, low maintenance, volume customized, and sized for mobility to supply Nitrogen.
Oil and Gas – Oil exploration and transportation involves a lot of industrial work in close proximity to flammable materials. Nitrogen gas reduces the possibility of combustion and promotes safety in the oil and gas industry.
Structurally, a hollow-fiber membrane represents a cylindrical cartridge functioning as a spool with specifically reeled polymer fibers. Gas flow is supplied under pressure into a bundle of membrane fibers. Surface gas flow separation is accomplished due to the differences in partial pressures on the external and internal membrane. Nitrogen production savings generally exceed 50% by substituting out-of-date cryogenic or adsorption systems. The net cost of nitrogen produced by nitrogen complexes is significantly less than the cost of cylinder or liquefied nitrogen.
Cryogenic liquefaction process
Pure gases can be separated from air by first cooling it until it liquefies then selectively distilling the components at their various boiling temperature. Although energy-intensive, this process can produce high purity gases.
In order to obtain good efficiency, the cryogenic separation process requires very tight integration of heat exchangers and refrigeration energy, which is provided by the compression of the air at the inlet of the unit.
Cryogenic LNG Vaporizers
Our vaporizers focus primarily on the heating and/or vaporization of cryogenic and low temperature fluids. Though we have experience with oxygen, nitrogen, ethylene, ammonia, and propane, our vaporizer systems are frequently applied for LNG vaporization in base load and peak shaving re-gasification facilities.
The submerged combustion vaporizer (SCV) is an indirect fired heat exchanger with the burner and process tube coil contained within a single vessel. This design is based on the submerged exhaust principle whereby the burner combustion products are discharged into a water bath, which is used as the heat transfer media for vaporizing the LNG in the tube coil.
Liquefied gases are used in a wide range of applications such as metal processing, medical technology, electronics, water treatment, energy generation, and the food industry. Today, more and more of these industrial gases are being delivered to customers in liquid form at cryogenic temperatures, enabling them to be stored onsite for later use.
The tanks range in capacity from 3,000 liters to more than 450,000 liters and come with standardized working pressures of 18, 22, or 36 bar.
They are standardized to ensure smooth distribution logistics and cost-efficient series production that comply with the European Pressure Equipment Directive (PED) or ASME VIII, Div. 1. Leading International Tank Standard (LITS) tanks.
Each tank is vacuum-insulated and can be delivered as a vertical or horizontal installation. The inner vessels and piping are made of stainless steel for high-grade cleanliness – particularly, important for the food and electronics industry. The outside shell is coated specially for outstanding insulation.