A liquid nitrogen cryogenic crushing low temperature nitrogen recycling integrated equipment

Abstract

The invention discloses a liquid nitrogen cryogenic pulverization and low temperature nitrogen recycling integrated equipment, which includes a liquid nitrogen storage tank, a liquid nitrogen control and conveying mechanism, a heat exchange tank mechanism, a cryogenic pulverization mechanism, and a liquid nitrogen cryogenic pulverization and low temperature nitrogen recovery. Using the integrated equipment, the liquid nitrogen inside the tank A is transported to the cryogenic pulverizing mechanism between the liquid nitrogen control and conveying mechanism and the heat exchange tank mechanism through the liquid nitrogen control and conveying mechanism. The heat of the plastic particles inside the cold crushing mechanism changes from liquid to gas, forming low-temperature nitrogen. The low-temperature nitrogen enters the tank body B and exchanges heat with water, and then the temperature rises, and finally the nitrogen with higher temperature is discharged. The invention relates to Reasonable, control the flow of liquid nitrogen, improve the quality of the product, and at the same time reuse the low-temperature source of the generated low-temperature nitrogen to effectively reduce energy consumption.

Description

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

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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