What is CO2 snow spraying? CO2 spraying is a process of cleaning and pretreating solid surfaces. The supply is liquid carbon dioxide and Compressed air. The blasting agent for so-called CO2 snow particles made from dry ice is produced only in liquid CO2 in CO2 snow removal equipment. Cleaning or pretreatment is dry, residue-free and environmentally friendly. CO2 snow blasting is also commonly known as dry ice sandblasting or CO2 particle sandblasting.甚么是甲烷喷雪？
甲烷喷雪是一类对液态表层展开洁净和后处理的操作过程。供给电介质是液态二氧化碳和冷却水。由冰冻做成的简而言之 CO2 雪粒的灭火剂仅在 CO2 调车电子设备中由液态 CO2 制造。洁净或后处理是潮湿、伪麻和节能环保的。甲烷喷雪一般来说也称作冰冻注塑或甲烷微粒注塑。
What supply medium does CO2 snow spraying need? CO2 spraying requires Compressed air and liquid CO2. No power connection is required because our CO2 snow spraying equipment has maintenance-free pneumatic controls. Liquid CO2 can be supplied in a single cylinder with a riser (up to 37.5 kg capacity) or in a bundle of cylinders with a riser (up to 450 kg capacity) or, in the case of stationary use, in a tank.
甲烷喷雪须要甚么样供给电介质？
甲烷喷雪须要冷却水和液态甲烷。不须要掌控器相连，即使他们的甲烷喷雪电子设备具备免保护的副翼掌控器。液态 CO2 可透过带立管的Chalancon（耗电量仅约 37.5 kg）或带立管的钢瓶束（耗电量 450 kg）提供更多，或是在一般来说采用的情况下，透过油罐供给。
How does a CO2 Snow Jet Work? The CO2 snow spray is connected to Compressed air and liquid CO2. No power connection. Liquid CO2 can be supplied either in a single bottle (up to 37.5 kg) or in a bundle (up to 450 kg) , each with a riser, or in stationary use, supplied through a tank. In a CO2 snow spray, the smallest, compacted particles of dry ice are produced, Compressed air as a sandblasting agent, accelerated with the help of high-performance nozzles and sprayed onto a clean surface. Large surfaces can be cleaned using flat nozzles up to 125mm in width. Even sensitive surfaces can be treated gently. Special round nozzles for stubborn dirt.
甲烷喷雪设备如何工作？
甲烷喷雪器与冷却水和液态甲烷相连。没有掌控器相连。液态 CO2 可以透过单个瓶子（耗电量仅约 37.5 公斤）或一束瓶子（耗电量 450 公斤）供给，每个瓶子都有一个立管，或是在一般来说采用的情况下，透过一个油罐供给。在甲烷喷雪器中，产生最小的、压实的冰冻微粒，作为注塑剂计量到冷却水中，在高性能喷嘴的帮助下加速并喷到要洁净的表层上. 可以采用喷射宽度仅约 125 mm 的扁平喷嘴洁净大面积表层。即使是敏感的表层也可以轻柔地处理。特殊的圆形喷嘴用于顽固的污垢。
What is the particle size in a CO2 snow jet? The diameter of dry ice particles in CO2 snow jet is from 1 to 200 μm. The average diameter depends on the nozzle used and the setting parameters used. Because of the small size of the CO2 particles, they clean the fine surfaces and pores of the structure.
CO2 雪射流中的微粒大小是多少？
CO2 雪射流中的冰冻微粒直径为 1 至 100 µm。平均直径取决于采用的喷嘴和采用的设置参数。由于甲烷雪粒的尺寸很小，因此可以洁净结构精细的表层和小孔，从可见到 3 – 5 纳米。同时，可以去除烃类污染物和有机残留物。
What is the velocity of the CO2 Snow Jet? By spraying snow with carbon dioxide, the equipment produces minimal, compacted particles of dry ice that are accelerated and sprayed onto a clean surface with the help of high-performance nozzles. The velocity of CO2 particles in a free jet depends on the nozzles used and the setting parameters used. Typically, the flow rate is in the range of 50 to 300 meters per second. Using special nozzles, we can also achieve air velocity greater than 330 m/s.
CO2 雪射流的流速是多少？
透过甲烷喷雪，在电子设备中产生更小的、压实的冰冻微粒，在高性能喷嘴的帮助下加速并喷射到要洁净的表层上。自由射流中 CO2 微粒的流速取决于采用的喷嘴和采用的设置参数。一般来说，流速在 50 到 300 m/s 的范围内。采用特殊的喷嘴，他们还可以实现大于 330 m/s 的空气声速的流速。
In the process of CO2 snow spraying, the liquid CO2 is transformed into compacted solid CO2 snow particles with diameter from 1 to 100 μm by thermodynamic and physical processes. The dry ice particles have a temperature of -78.5 °C. CO2 particles are added to the Compressed air. Particles are accelerated by Compressed air in the nozzle. A uniform free jet can be produced taking into account the flow rate, temperature and pressure conditions. Depending on the nozzle, a circular jet (circular nozzle) with a high level of cleaning capability or a flat jet (flat nozzle) with a width of up to 125mm and uniform cleaning performance is formed. This free jet can be used for cleaning and pretreating surfaces.
系统基本原理
在 CO2 喷雪操作过程中，液态 CO2 透过热力学和物理操作过程转化为直径为 1 至 100 µm 的压实固态 CO2 雪粒。这些冰冻甲烷雪粒的温度为-78.5°C。甲烷雪粒被添加到冷却水中。微粒被喷嘴中的冷却水流加速。考虑到流量、温度和压力条件，可以产生均匀的自由射流。根据喷嘴的不同，形成具备高水平洁净能力的圆形射流（圆形喷嘴）或宽度仅约 125 mm 且洁净性能均匀的扁平射流（扁平喷嘴）。这种自由喷射可用于洁净和后处理表层。
Clean mechanism solid surfaces can be treated gently with CO2 snow spraying. Cleaning with a CO2 snow blower is based on a complex process mechanism with temperature, spray, and solvent effects. CO2 particles can suddenly cool pollutants, causing them to separate from the substrate. The sudden sublimation of CO2 snow particles produces pressure fluctuations that loosen impurities in the surface microregions and even in the pores. Contaminants are removed from the surface and removed by sliding, tilting and impact blasting. Because of the physical solubility of these organic substances in CO2, it is also possible to perform ultrafine cleaning, especially of oils. The Compressed air stream helps to remove the cleaned contaminants.
洁净监督机制
固体表层可以用甲烷喷雪轻轻地处理。采用 CO2 喷雪机展开洁净是基于具备温度、喷射和溶剂效应的复杂工艺监督机制。CO2 雪粒会突然冷却污染物，导致污染物与基材分离。甲烷雪粒的突然升华会产生压力波动，从而松动表层微区域中的杂质，从而甚至孔隙中的杂质。透过滑动、倾斜和冲击注塑工艺将污染物从表层去除并运走。由于这些有机物质在 CO2 中的物理溶解度，因此也可以展开超精细洁净，尤其是对油脂的洁净。压缩空气流有助于清除已洁净的污染物。
