Gardner Denver Nash has been supplying efficient and reliable vacuum systems to the chemical and refining industries worldwide for more than 50 years. These vacuum systems maximize output and efficiency while minimizing maintenance and pollution into the environment.
In this application, chlorine gas is recovered and compressed. The seal liquid is concentrated (> 96%) sulfuric acid. Materials used must be compatible with this highly dangerous gas and seal liquid.
This application involves the recovery of hydrogen gas. The low molecular weight of hydrogen and its explosive nature create challenges when selecting equipment. NASH compressors are ideally suited for this application due to their liquid ring technology, which minimizes the chance of explosion.
In this application, the moisture from the filtrate receiver of a vacuum filter is collected and fed back into the system. If a system upset occurs, such as the failure of the filtrate pump, slugs of liquid can carry over into the vacuum system. Soft solids from the filter can also enter the vacuum system. In both cases, the liquid and soft solids will not damage the liquid ring vacuum pump, improving the overall reliability of the vacuum filtration system. A variety of seal liquids compatible with the process vapors may be selected in order to minimize contamination of gases extracted during the filtration process.
Vapor Recovery/Gas Boosting
This application differs from vent gas recovery in that the vapors recovered are of a relatively fixed composition rather than a variable mixture. A typical application is capturing gases vented from storage tanks. The vacuum level is closely controlled in order to protect the storage tanks. Usually the discharge pressure is relatively low. Often these gases are returned to the process or are liquified and returned to the storage tanks.