TKS offers NMP solvent recovery systems for use in battery manufacturing facilities.
An NMP solvent recovery system is an advanced HVAC system for use in lithium-ion battery electrodes manufacturing facilities. It includes a clean room, permanent total enclosure (PTE), duct system, activated carbon or zeolite adsorption and desorption wheel, heating, cooling, pumps, fans, and condensing system and tank. The adsorption wheel is designed to capture N-Methyl-2-pyrrolidone (nMP) and other volatile organic compounds (VOCs) and hazardous air pollutants (HAPs) from battery manufacturing process exhausts.
The NMP concentrator system consists of three main phases: adsorbing, where the NMP is captured; desorbing, where the NMP is heated and released; and condensation and collection, where the NMP is cooled, liquified, and collected in a tank for re-use after a purification process to remove the contaminant chemicals.
A heat exchanger is used to recover waste heat from the Desorber and heat the fresh air coming in to the Desorber. The entire NMP system is closed-loop, ensure 99% recovery of the NMP solvent.
NMP Recovery consists of three primary process steps:
Taikisha's revolutionary NMP system offers energy savings and environmental friendliness by recovering NMP used in the manufacturing process of lithium-ion batteries.
This system recycles "clean" exhaust gas as fresh air supply back into production areas at a rate of 100%, a closed loop system. Offering NMP recovery efficiency of 99%, and waste heat recovery of 60% or higher. Since delivering our first system in 1995, we have provided nearly 50 systems worldwide as of 2022.
NMP has a high boiling point and a low vapor pressure at room temperature, allowing for highly-concentrated NMP to be easily condensed by cooling down below room temperature for recovery. NMP is a fairly expensive solvent, so the recovery and recycling of NMP can lead to a reduction of operating costs (OpEx) for owners.
The largest equipment piece is the Adsorption/Desorption wheel used to concentrate the NMP solvent in a small airstream for energy-efficient cooling and recovery.
The key feature of the NMP recovery process is a cooler, providing for the condensation of the NMP solvent into a liquid where it can easily be stored in a tank for purification and reuse.
Up to 90% reduction in waste and wastewater generated, when compared to an equivalently sized Wet Scrubber solution, and up to 50% reduction in electricity, depending on inlet conditions.
Up to 50% reduction in VOC and hazardous air pollutant (HAP) emissions versus a Wet Scrubber. The closed-loop system provides for 99% capture of NMP and other HAPs.
Perhaps the greatest benefit to owners is a reduced OpEx cost, saving them significant money by capturing and reusing the expensive NMP solvent.
The NMP Recovery & Solvent Concentrator system works best for industrial exhausts containing gaseous NMP solvent. Other organic solvents, including VOCs, HAPs, and other volatile organics will hamper the system's ability to collect NMP. Inorganic waste gases such as H2S, ammonia, and acid gases are a better fit for a wet/gas scrubber.
VOC Concentrator doesn't work with exhaust temps above 120°F, exhausts containing alcohols with low boiling points or long-chain organics with high boiling points. Customers should also avoid non-volatiles and compounds prone to polymerization or joining reactions with other exhaust chemicals.
Most batches of zeolite last about one year, but it does vary some based on the solvent loading, total run time, and type of solvents, particularly the percentage high boiling point solvents.
Smaller NMP Recovery systems can fit in a 50' x 50' area, but medium-to-large NMP Recovery require a 50' x 100' area.
As of 2022, the Taikisha NMP Recovery system has been installed 50 times worldwide since introduction in 1995, at several different Fortune 500 companies.
The zeolite rotor concentrator itself is completely inorganic and incombustible. The solvents themselves can combust, if heated to a high temperature, but when compared to activated carbon concentrator wheel, zeolite has a low risk of combustion, offering improved saftey for your associates.
Let TKS handle every aspect of your project from start-to-finish.
TKS yearly NMP Concentrator health check assessments to evaluate performance, zeolite life, and perform critical preventative maintenance tasks. Let the experts handle the maintenance for you.
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