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The role of small liquid nitrogen equipment in the manufacturing process of plastics and rubber
Date: 2025-08-15Read: 1
Liquid nitrogen, as a common low-temperature liquid, is widely used in medical, scientific research, industrial and other fields. Liquid nitrogen has the characteristic of extremely low temperature (about -196 ° C) and can be used for various experiments and operations that require low-temperature environments. With the development of technology, more and more small-scale liquid nitrogen equipment has emerged, providing more convenient and economical low-temperature solutions for various industries.
Small liquid nitrogen equipmentWorking principle:
1. Liquid nitrogen storage tank
The storage tank is the core part of liquid nitrogen equipment and usually adopts a double-layer structure. The inner layer is used to store liquid nitrogen, and the outer layer is an insulation layer to reduce the evaporation loss of liquid nitrogen. The material of liquid nitrogen storage tanks is generally selected from low temperature resistant metals, such as stainless steel or aluminum alloy, which can effectively withstand the low temperature environment of liquid nitrogen.
2. Cooling system
Working through the principle of evaporation and heat absorption of liquid nitrogen. Liquid nitrogen is released from the storage tank and transported through pipelines to the equipment or containers that require cooling. After absorbing heat, liquid nitrogen will rapidly evaporate, releasing low-temperature gas, and ensuring the stable operation of the equipment through appropriate control systems.
3. Gas transmission pipeline
After being released from the storage tank, liquid nitrogen is transported to the required location through the gas delivery pipeline. In this process, the material and design of the pipeline need to ensure the safe transmission of liquid nitrogen gas and prevent leakage during transportation.
4. Control system
Usually equipped with temperature control and flow control systems, used to regulate the output and temperature of liquid nitrogen. These control systems ensure that the equipment can work stably during operation, avoiding the impact of excessive temperature fluctuations on experiments or production.
Application areas of small liquid nitrogen equipment:
1. Medical field
-Cryotherapy: Through the low-temperature effect of liquid nitrogen, skin lesions such as warts and moles can be quickly frozen, and even used for cryoablation of certain small tumors.
-Cell and tissue preservation: Liquid nitrogen is widely used for long-term preservation of cells, tissues, and embryos. Low temperature environment can slow down cell metabolism, ensure its biological function, and provide reliable biological sample preservation methods for scientific research, medical experiments, etc.
2. Research field
-Low temperature freezing experiment: Liquid nitrogen can quickly cool experimental samples to extremely low temperatures, which is often used in biology, chemistry, and other fields for freezing and preserving samples, or for studying the effects of low temperature on material changes.
-Low temperature superconductivity research: In superconducting material research, liquid nitrogen is used as a cooling medium in experiments to obtain the low-temperature environment required for superconducting phenomena.
3. Industrial applications
-Metal hardening and stress relief treatment: Liquid nitrogen is used for heat treatment of metal materials, especially for the hardening process of high-temperature alloys, steel and other materials. By low-temperature treatment, metal surfaces can achieve higher hardness and wear resistance.
-Plastic and rubber processing: In the manufacturing process of plastic and rubber, liquid nitrogen can be used to cool and solidify materials, improving the accuracy and performance of products.
-Electronic component testing: During the manufacturing process of electronic components, liquid nitrogen can be used for low-temperature testing to ensure the stability and reliability of the components in low-temperature environments.
4. Food industry
-Quick frozen food processing: The low temperature of liquid nitrogen can quickly cool food to below -18 ° C, preserving its freshness and nutritional content, especially suitable for quick freezing of meat, vegetables, seafood and other foods.
-Liquid nitrogen ice cream production: In recent years, liquid nitrogen ice cream has become increasingly popular in the market. Through the rapid freezing effect of liquid nitrogen, smooth and delicate ice cream can be quickly produced for export.