The concentration of NMP solution can detect the important influence in the process of lithium battery coating machine
During the production of lithium battery electrodes, the solvent NMP in the coating machine slurry will form a gaseous state after being heated, and NMP gas is poisonous. NMP is also a flammable and explosive liquid, which has the potential to explode when mixed with air nmp solvent. Therefore, this link requires special equipment to realize the automatic detection of NMP concentration to ensure the safety of workers.
Online NMP solution concentration meter MSDR-SH70-DP uses the principle of refraction to measure the refractive index of NMP solution. The refractive index has a good corresponding relationship with the concentration of NMP solution, and the accurate solution concentration value can be obtained through conversion.
The latest process recovery principle is to use cooling water to cool the high-temperature air containing NMP through a water-air heat exchanger, so that the NMP in the waste gas can be separated and recovered from the air in liquid form, and the real-time concentration of NMP is controlled by an online concentration sensor nmp, which greatly improves Improve recycling efficiency and automation productivity. The separated NMP air is recirculated through the air-to-air heat exchanger to achieve energy-saving and zero-emission environmental protection standards.
The waste gas from the production unit is absorbed by the absorption unit, and the NMP in the waste gas is basically dissolved in water or steam 1 methyl 2 pyrrolidone. After gas-liquid separation and rinsing, the NMP in the waste gas is completely absorbed.
Based on the company's recycling and processing devices, it has its own assembly of circulating pumps. The online concentration of NMP and the sensor installed in the pipeline of the circulating pump can analyze and detect the concentration of NMP liquid in real time, which can effectively reduce the waste of water resources in my country and monitor the discharge of finished NMP recovery liquid.
The online concentration sensor of NMP solution is usually installed in the first (inner) loop, where the absorption solvent (such as water) comes from the second loop, the solvent has absorbed the target component in the exhaust gas in the second loop, and further absorbs in the first loop Finally, the absorption capacity of the solvent will decrease. The concentration meter monitors the concentration of the target component in the solvent, judges the absorption capacity of the solvent to the target component, and decides whether to discharge the internal circulation solution and whether to add fresh absorption solvent to improve recovery efficiency.
Application advantages:
Improve measurement accuracy and reduce measurement error (0.5%): The NMP solution online concentration meter has an accurate automatic temperature compensation function to ensure that the concentration of NMP solution can be accurately measured in different measurement environments.
Improve control accuracy: Control the discharge valve switch by outputting standard control signals, and continuously close-loop detection and control to ensure the stability and accuracy of the NMP solution concentration.
Improve recovery efficiency: Avoid the reduction of the exchange and dilution capacity between high-concentration internal circulation wastewater and waste gas during the recovery process, so that the NMP in the waste gas cannot be fully recovered and discharged out of the tower, reducing recovery efficiency and causing NMP waste.
It can realize 24-hour continuous monitoring, improve the degree of enterprise automation development, reduce production labor intensity, and reduce manual management costs.
Related Hot Topic
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