Liquid nitrogen cryogenic grinding and low-temperature nitrogen recycling integrated device

Abstract

The invention discloses a liquid nitrogen cryogenic grinding and low-temperature nitrogen recycling integrated device. The liquid nitrogen cryogenic grinding and low-temperature nitrogen recycling integrated device comprises a liquid nitrogen storage tank, a liquid nitrogen control conveying mechanism, a heat exchange tank body mechanism and a cryogenic grinding mechanism. According to the liquidnitrogen cryogenic grinding and low-temperature nitrogen recycling integrated device, liquid nitrogen in a tank body A is conveyed to the cryogenic grinding mechanism between the liquid nitrogen control conveying mechanism and the heat exchange tank body mechanism through the liquid nitrogen control conveying mechanism, the liquid nitrogen absorbs heat of plastic particles in the cryogenic grinding mechanism after passing through the cryogenic grinding mechanism and then is changed into a gas state from a liquid state, low-temperature nitrogen is formed, the low-temperature nitrogen enters a tank body B to exchange heat with water, then the temperature is increased, and finally the nitrogen with the high temperature is discharged. The liquid nitrogen cryogenic grinding and low-temperaturenitrogen recycling integrated device is reasonable in design, the flow of the liquid nitrogen is controlled, the product quality is improved, meanwhile, a low-temperature source of the generated low-temperature nitrogen is reused, and energy consumption is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of liquid nitrogen cryogenic crushing and low-temperature nitrogen recovery and utilization, in particular to an integrated equipment for liquid nitrogen cryogenic crushing and low-temperature nitrogen recovery and utilization. Background technique [0002] The new hot-melt material is a single-component, water-free, solvent-free, environmentally friendly, energy-saving thermoplastic polymer material that is solid at room temperature, and is especially suitable for low-energy, fast, and pollution-free modern production processes. As an important member of new hot-melt materials, hot-melt adhesives, especially polyester and polyamide high-grade hot-melt adhesives, are widely used in clothing, shoes and hats, bags, etc. due to their excellent adhesion and easy processing and usability. , automotive interior, electronic appliances, wood processing, anti-corrosion, painting and many other industries. Hot melt a...

AI Technical Summary

Problems solved by technology

[0004] Another common problem in cryogenic pulverization is that the flow of liquid nitrogen is not effectively and accurately controlled during the transmission of liquid nitrogen from the liquid nitrogen storage tank to the cryogenic pulverizer.

The ineffective control of liquid nitrogen flow not only affects the efficiency of liquid use, causing unnecessary waste, but also causes the cooling temperature of hot melt adhesive particles to be unstable, thereby affecting the particle size and distribution of the obtained hot melt adhesive powder, affecting the Process performance and adhesive performance of hot melt adhesive in subsequent use process

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