Gas Stripping is a physical separation process where one or more components are removed from a liquid stream by a vapor stream. In industrial applications the liquid and vapor streams can have co-current or countercurrent flows. Stripping is usually carried out in either a packed or trayed column. Stripping is the opposite direction to the absorption, in which one or more gaseous components in a liquid stream is removed from the gas-liquid solution by being vaporized into an insoluble gas stream In the stripping operation, the insoluble gas stream is the separating agent.
Industries are facing major setbacks to strip gases from waste streams/ process streams at high operational costs to meet the growing concern and environmental norms. Wastewater Pollution is becoming a challenge in the Industry. Conventional stripping columns use huge amounts of energy and have a very high operating cost due to high steam, air, inert gases, and hydrocarbon gases consumption. STRIPCAV uses gas-liquid contact to evaporate/ concentrate these streams
Design and process operation:
- STRIPCAV system is developed to be a very efficient and intensive device to get gasses and liquids into contact with each other. The unique feature of the technology is that stripping or dissolution of solute takes place into gaseous phase with a minimum energy input
- It results in no pollution of the process fluid by the media when it is used in the process industry. The modular design of the system makes it possible to realize a system for any desired capacity
- The liquid containing target solute flows down along specially designed cavitation plates creating a negative pressure in the downward direction, through protruding venturi openings that are present on the upper surface of this plate.
- The negative pressure causes the gas stream to pass from underneath the plate into the flow of liquid as long stretched bubbles that stay long enough in swirling vortex contact with the liquid to become saturated with vapor exchange from other components or waste thermal energy.
- A low pressure ventilator transports the gas and enhances the gas/liquid contact. This process offers an optimal exchange of components at minimal energy input
- Waste energy e.g. from heating, cooling, Flue gasses and ventilating can be put to good use.
Features and Benefits of STRIPCAV
- Very Low energy consumption
- Low level waste heat can be utilized.
- Not sensitive to fouling
- Compact, modular and robust construction.
- Simple operation and no maintenance.
- Low Operating costs. Over 75% cheaper.
- Multiple Uses
- Contaminated ventilation air or flue gases can be washed by leading the gas stream through one or more such units.
- Dust and soot particles are trapped in the liquid while calorific energy (present in the gas flow) can be recovered, and utilized for evaporation. Normal air blowers are employed.
- The unique features of the system regarding prevention of fouling and clean-ability enable application of the technology on highly fouling, scale forming liquids.
Applications and Uses:
- Evaporation of Reverse Osmosis Rejects – as replacement of Agitated TFD
- Wastewater concentrators – as replacement of MEE.
- Salt Thickeners.
- Stripping of Impurities
- Gas scrubbers for removal of Impurities
- Aeration of Liquids
- Gas Cooling
Where water is used extensively at some point along the process, either in machinery, washing process or playing a crucial part in the manufacturing process, problems occur when water mixed up with oil.
Industries as diverse as steel, biodiesel, manufacturing, food processing, trucking service industries, wastewater treatment and utility – all face a simple, common problem: oily water. Regardless of whether the facility reuses the water or sends it to an effluent treatment plant, it has to be removed. Many facilities, however, are not equipped to effectively remove oil from water. When oil is not continuously removed from the surface of the oil/water separator, problems such as oil escaping from the separator chamber, blocking the air to reach the water and growth of anaerobic bacteria, foul odor can have a direct impact on the process output as well as the economics.