Chinese name: dry ice English name: dry ice definition 1: solid carbon dioxide (CO2), white. It will sublimate into gas at -78.5℃ and ambient atmospheric pressure, and serve as a cold transport catalyst in weather modification, with molecular weight of 44.0 1 density (solid) 1560kg/m3(-78℃), melting point of -57℃, freezing point of -78.5℃ and triple point of-56.6℃ 5.66. Soluble in water (volume ratio: 1: 1), partially generating carbonic acid. The liquid-gas ratio is 8.726SCF (gas) /LB (liquid-17.8℃, pressure 2 1kg/cm), and the liquid-solid ratio is 0.46(- 17.8℃)-0.57(-48℃), which is widely used. Dry ice is widely used in food, sanitation, industry and catering. Mainly include: 1, the application scope of dry ice in industrial molds: tire mold, rubber mold, polyurethane mold, polyethylene mold, PET mold, foam mold, injection mold, alloy die-casting mold, hot core box for casting, cold core box, which can remove residual resin, invalid peeling layer, carbonized film agent and oil stain, and open air holes. After cleaning, the mold is as bright as new. On-line cleaning does not need to cool and disassemble the mold, which avoids the corrosion and damage of the mold by chemical cleaning method, the mechanical damage and scratch of the mold by mechanical cleaning method, and the decline of mold accuracy caused by repeated loading and unloading. Crucially, the two most time-consuming steps of removing the mold and waiting for the mold to cool can be omitted, and the downtime can be reduced by about 80%-95%. Benefits of dry ice cleaning: dry ice cleaning can reduce downtime; Reduce equipment damage; Very effective cleaning of high-temperature equipment; Reduce or reduce the use of solvents; Improving the safety of staff; Improve maintenance efficiency; Reduce production downtime, reduce costs and improve production efficiency. 2. Application scope of dry ice in petrochemical industry: cleaning of main fans, air compressors, hoods, steam turbines and blowers, and removal of coking and carbon deposits in various heating furnaces and reactors. Clean the PVC resin on the heat exchanger; Remove oil stains, rust, hydrocarbons and dirt on the surfaces of various pressure vessels such as compressors, storage tanks and boilers; Cleaning the reaction kettle and condenser; Complex biological purification; Furnace tube cleaning, etc. 3. The application scope of dry ice in food and medicine industry can successfully remove baking residues, colloidal substances, oil stains and fresh product mixtures before baking. Effectively clean ovens, mixing and stirring equipment, conveyor belts, molded products, packaging equipment, stoves, stoves, containers, rollers, refrigerator inner walls, biscuit stoves, etc. Benefits of dry ice cleaning: put an end to the use of harmful chemicals, and avoid production equipment contacting with harmful chemicals and generating secondary garbage; Prepare or remove bacteria such as Salmonella and Listeria, and disinfect and clean more thoroughly; Eliminate the damage of water jet cleaning to electronic equipment; Minimum equipment decomposition; Reduce downtime. 4. Application scope of dry ice in printing industry It is difficult to remove ink, and the accumulation of ink on gears and guide rails will lead to poor printing quality. Dry ice cleaning can remove all kinds of oil-based and water-based inks and varnishes, clean up oil stains, accumulated inks and dyes on gears, guide rails and nozzles, and avoid the discharge of harmful wastes and solutions and personal injuries caused by harmful solvents. 5. The application scope of dry ice in power industry can clean electric boilers, condensers and various heat exchangers; Can directly clean indoor and outdoor transformers, insulators, power distribution cabinets, live wires and cables (below 37KV); Generator, motor, rotor, stator and other parts are clean and free from damage; Clean the rust, hydrocarbon and adhesive powder on turbines, impellers, blades and other parts, without disassembling the blades and readjusting the dynamic balance of the blades. Benefits of dry ice cleaning: effectively decompose pollutants to be cleaned; Because these pollutants are removed, the power loss is reduced; The maintenance cost of external equipment and its basic equipment is reduced; Improve the reliability of power system; Keep the insulator intact and non-abrasive clean; More suitable for preventive maintenance. 6. Application scope of dry ice in automobile industry Cleaning the doorskins, roofs, carriages, car bottoms and other oil stains will not cause water pollution; Cleaning of automobile carburetor and removal of automobile surface paint; Remove carbon deposits from the engine. If the carbon deposit is treated, it will take a long time to treat it with chemical agents, at least more than 48 hours, which is harmful to human body. Dry ice cleaning can completely solve the problem of carbon deposition within 10 minute, saving time and reducing cost, and the scale removal rate reaches 100%. 7. Application scope of dry ice in electronic industry Cleaning grease and dirt inside robots and automation equipment; Clean the integrated circuit board, post-welding flux, pollution coating, resin, solvent coating, protective layer and photosensitive corrosion inhibitor on the printed circuit board. 8. Application scope of dry ice in aerospace: pretreatment of coating and assembly of missiles and aircraft; Paint removal of composite molds and special aircraft: engine carbon cleaning; Maintenance and cleaning (especially the landing gear-wheel well area); Depainting of aircraft shells: jet engine conversion system. Can work directly in the body, saving time. 9. Application scope of dry ice in shipbuilding industry: hull; Seawater suction valve; Seawater condenser and heat exchanger; The machine room, machinery and electrical equipment are cleaner than ordinary high-pressure water jet cleaning. 10. Application scope of dry ice in nuclear industry If nuclear industry equipment is cleaned by traditional cleaning methods such as water, sand blasting or chemical decontaminating agent, the media such as water, sand blasting or chemical decontaminating agent will also be polluted by radioactive elements, so it takes time and money to treat these secondary polluted media. In the process of dry ice cleaning, dry ice particles are directly sprayed on the object to be cleaned, which instantly sublimates, and there is no problem of secondary pollution. All that needs to be treated is the cleaned waste with nuclear pollution and scale. 1 1. Application scope of dry ice in beauty industry Some dermatologists use dry ice to treat acne, which is called cryotherapy. Because it will slightly freeze the skin. There is a frozen substance for treating acne, which is made of ground dry ice and ethyl ketone, and sometimes some sulfur is added. Liquid nitrogen and solid dry ice can also be used as cryotherapy materials. Cryotherapy can reduce inflammation. Some time ago, the news reported that Liu Xiang used this cryotherapy to treat acne on his face. This method can reduce the generation of acne scars, but it is not used to remove scars. 12. Application scope of dry ice in food industry A Adding dry ice to wine, cocktail or beverage is cool and delicious when drinking, and the cup is full of smoke, which is very pleasant. B when making ice cream, dry ice is added, and the ice cream is not easy to melt. Dry ice is especially suitable for cold storage of takeaway ice cream. Seafood specialties cooked in restaurants of C-star hotels, with dry ice, can create a white smoke landscape and improve the banquet level, such as lobster sashimi. D lobster, crab, shark fin and other seafood are frozen and refrigerated. Dry ice will not change water, and it is cleaner than water-cooled storage. Widely used in Europe, America, Japan and other countries. 13, the application scope of dry ice in the field of refrigerated transportation-low-temperature refrigerated medical use and low-temperature transportation of special drugs such as plasma and vaccines. B. Long-distance and short-distance transportation of electronic cryogenic materials and precision parts. C. preservation and transportation of high-grade foods such as high-grade beef and mutton. 14. The application scope of dry ice in the entertainment field is widely used in the stage, theater, film and television, weddings, celebrations, party effects and so on to create smoke. For example, some programs in the National Theatre use dry ice to produce effects. 15. Application scope of dry ice in fire fighting industry Dry ice is used for fire fighting, such as some low-temperature fire extinguishers, but its application in this respect is less, that is, the market level is low.