Latest from the Lvbang team.绿邦团队的最新动态。

As a basic olefin medium, ethylene is widely used in polyethylene synthesis and fruit & vegetable ripening. Less known to the public is its role in industrial cryogenic refrigeration. This article introduces this common yet easily overlooked industrial medium from three dimensions: medium properties, process functions and safety management. 乙烯作为基础烯烃类介质，日常多用于聚乙烯合成与果蔬催熟，却较少进入公众视野的是它在工业深冷制冷领域的角色。本文从介质特性、工艺角色、安全管理三个维度，带您认识这种常见却容易被忽略的工业介质。

Ethylene · A Key Medium for Industrial Cryogenic Refrigeration 乙烯 · 工业深冷制冷的关键介质

▍1. Medium Properties: Basic Olefin, Easy to Liquefy ▍一、介质特性：基础烯烃，易于液化

Ethylene, molecular formula C₂H₄, is a fundamental olefin in the chemical industry. It is a colorless gas at ambient temperature with a boiling point of -103.7 ℃ and low liquefaction temperature. Colorless and faintly sweet under normal temperature and pressure, it can be adopted in cascade cryogenic refrigeration processes thanks to its easy liquefaction feature. 乙烯，分子式 C₂H₄，是化工行业基础的烯烃类介质。常温下为无色气体，沸点 -103.7℃，具备较低的液化温度。常温常压条件下呈无色气体状态，带有微弱甜味，易于液化的特性，让它可以应用于级联式深冷制冷工艺。

Cascade refrigeration compressor unit & cold box 级联制冷压缩机组与冷箱

▍2. Process Role: Intermediate Step of LNG Cascade Refrigeration ▍二、工艺角色：LNG 级联制冷的中间环节

In the full LNG cascade refrigeration flow, ethylene serves as the intermediate cooling stage. Working together with propane, isopentane and other media, it achieves gradient cooling via heat absorption during phase change to reach required cryogenic conditions, which makes it a vital component of the whole refrigeration system. 在 LNG 级联制冷整套流程当中，乙烯承担中间制冷环节。与丙烷、异戊烷等介质协同配合，依靠相变吸热原理完成梯度降温，以此达到工艺所需深冷工况，是整套制冷体系重要的组成部分。

Most people know ethylene for plastic production and fruit ripening, yet it also plays an important part in industrial scenarios. Stepwise refrigeration utilizing boiling-point differences of multiple media is a mature technical route in the LNG industry, and ethylene performs heat exchange for a specific temperature zone in this process. 日常生活里大家熟悉乙烯多用于塑料生产、果蔬催熟，但在工业场景，它也有重要应用。利用多种介质沸点差异完成阶梯制冷，是 LNG 行业成熟可行的技术路线，乙烯就在这套工艺里承担特定温区的换热任务。

Ethylene cryogenic storage tank unit & leak detection 乙烯低温储罐单元与泄漏检测

▍3. Safety Management: Flammable Medium, Compliance First ▍三、安全管理：易燃介质，规范先行

Ethylene is Class 2.1 flammable hazardous chemical. Strict safety requirements apply to its storage and usage, including leak monitoring, explosion-proof protection, closed storage and other facilities. All operations must fully comply with relevant regulations for hazardous chemicals. 乙烯属于 2.1 类易燃危险化学品，它的存储与使用有着明确的安全硬性要求，需要配置泄漏监测、防爆防护、密闭存储等相关设施，所有作业活动必须严格遵循危化品管理相关规范。

To meet business demands of cascade refrigeration processes, Lvbang Chemical has built ethylene storage and operation units on site. A standardized management system is implemented, with storage tanks, leak alarm detectors and operating procedures aligned to current safety standards, ensuring stable and controllable storage and on-site operations. 为匹配级联制冷工艺业务需求，绿邦化工厂区配套建设乙烯存储与相关作业单元。厂区建立标准化管控体系，储罐硬件设施、泄漏报警检测装置、人员作业操作流程对标现行安全管理标准，助力介质存储、现场作业平稳可控。

Standardized Control to Unlock Industrial Value 规范管控，释放工业价值。

Industrial media themselves are neither good nor bad. Only standardized control and proper utilization can release their industrial value. Lvbang Chemical strictly follows industry standards, manages all kinds of industrial media properly, and provides process support for downstream industrial projects. 工业介质本身没有好坏，规范管控、合理使用才能释放它的工业价值。绿邦化工恪守行业相关规范标准，做好各类工业介质的厂区管理，为下游工业项目提供工艺配套支撑。