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Guangzhou Rongjie NMP recycling system

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Guangzhou Rongjie NMP recycling system
Guangzhou Rongjie NMP recycling system

Guangzhou Rongjie NMP recycling system

Principle

The NMP waste gas discharged from the coater reaches the filter box device through the exhaust pipe for purification and filtration, and then is sent to the waste heat recovery device and then to the condensing host device for cooling and condensation. Most of the NMP in the waste gas can be condensed out and enter the waste liquid system, and the concentration of NMP in the condensed waste gas is reduced to below 300ppm.

90~95% of the low-temperature waste gas after condensation is sent to the waste heat recovery device, where it exchanges heat with the high-temperature waste gas discharged by the coating machine, and then the low-temperature waste gas is heated to meet the return air requirement and sent back to the coating machine, thus fully realizing the heat energy recovery and saving the heating energy consumption required by the coating machine.

VOCS zeolite molecular sieve runner is divided into adsorption treatment zone, cooling zone and desorption zone, and driven by motor, which makes the runner rotate slowly, continuously adsorb and regenerate, and recycle tail gas. 5~10% of the condensed waste gas is mixed with the high temperature air in the desorption zone and enters the surface cooling section of the runner, where it is cooled and condensed, and most NMP can be condensed out and enter the waste liquid system. Then it is sent to the adsorption treatment area, and the air that meets the standard after adsorption can be exhausted to the outside by a fan.

In addition, a small amount of qualified air is recycled for heat exchange in the cooling zone, so that the air is heated and the runner is cooled. The heated air is heated by a heating device (steam heating or electric heating or heat transfer oil heating), and then the NMP on the runner zeolite is desorbed in the desorption zone, and the high-temperature air containing NMP in the desorption zone is sent to the surface cooling section of the runner. The whole runner process makes full use of the recycling of heat energy and saves the heating energy consumption required by the coating machine.

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    Project: Guangzhou Rongjie NMP recycling system
    Customer demand parameter Equipment parameter
    Air volume: 1#- positive electrode - 168,000 m³/h*4
    1#- negative electrode -117600m³/h*4
    5#- positive electrode -6000m³/h*1
    5#- positive electrode -15000m³/h*2
    5#- negative electrode -6000m³/h*1
    5#- negative electrode -11000m³/h*2
    Tank farm: Good liquid tank -150m³*2
    Liquid waste tank -150m³*2    		 Equipment type Treated air volume Equipment size NMP liquid recovery concentration Runner material Tail gas emission concentration
    Production line (positive and negative) : 1#- positive electrode - 168,000 m³/h*4
    1#- negative electrode -117600m³/h*4
    5#- positive electrode -6000m³/h*1
    5#- positive electrode -15000m³/h*2
    5#- negative electrode -6000m³/h*1
    5#- negative electrode -11000m³/h*2
    Tank farm: Good liquid tank -150m³*2
    Liquid waste tank -150m³*2    		 diameter Altitude
    NMP liquid concentration: ≥90% PJNMP-168K
    PJNMP-117.6K
    PJNMP-6K
    PJNMP-15K
    PJNMP-6K
    PJNMP-11K    		 168000m³/h
    117600m³/h
    6000m³/h
    15000m³/h
    6000m³/h
    11000m³/h    		 φ1050
    φ650    		 / ≤300ppm Zeolite molecular sieve 1.457mg/m³
    Heat transfer efficiency: ≥85%
    NMP gas exhaust index: ≤10mg/m³，After activated carbon treatment≤1.457mg/m³
    Floor area: 1#：1794㎡，5#：240㎡，Tank farm：1390㎡
    Process flow: waste heat recovery + condensation freezing + wheel + activated carbon treatment.
    Project features: This project is an automatic NMP recovery and treatment system for a tow with a large volume of air. Efficient waste heat recovery heat treatment, exhaust air for effective heat exchange. Cryogenic condensation, full recovery of NMP waste liquid. The zeolite seed is adsorbed by wheel and then adsorbed by activated carbon device to meet the discharge requirements. G4F8 impurities filter, ensure equipment and return air cleanliness.