Please select the most similar patent number from A, B, C and D. Which number is?
A liquid gas industrialized application system, comprising: an air separation liquid gas generating device (1), which is used to produce liquid oxygen, liquid nitrogen and/or liquid argon; a cold energy utilization device, which absorbs cold energy of the liquid oxygen and/or liquid nitrogen to directly cool items that need cooling or uses the freezing point of a refrigerant to store the items; a potential energy utilization device, which uses the gasification and expansion of the liquid oxygen and/or liquid nitrogen to generate pressure to do work; a characteristic utilization device, which stores nitrogen in tanks or carries out an industrial application according to the characteristics of nitrogen, and stores oxygen in tanks or carries out an industrial application; a chemical product utilization device, which uses oxygen to produce ozone, and uses the ozone to produce hydroxyl radicals; and an oxidation device, which sterilizes and/or decomposes polymer compounds on the basis of the strong oxidizing properties of the hydroxyl radicals.
A: A laundry treatment device (10), comprising: an ozone generator (100) used for generating ozone; an air pump (102) connected to the ozone generator (100) and used for driving ozone; a laundry treatment drum (104); and a catalyst cavity (106) in communication with the laundry treatment drum (104), further in communication with the ozone generator (100), and used for accommodating a catalyst, the catalyst being used for performing a chemical reaction with ozone and water. According to the technical solution, in the washing process, ozone and a hydroxyl radical can be simultaneously used to sterilize, and in the drying process, an ozone gas can be individually used to sterilize. Moreover, the dissolving of a detergent can be accelerated, cold water can be used to sterilize, the color contamination of the laundry is prevented, etc.
B: Provided is a device that uses ozone, hydrogen peroxide, and hydroxyl radicals to sterilize, detoxify and purify indoor air, while simultaneously removing radon gas. The device is provided with a condensing unit (10) having a Peltier structure, and further provided with a device (2) that discharges electricity and generates ozone. The device further has an ultraviolet lamp (9) and a titanium dioxide coating for creating a titanium dioxide physical environment. The device is also provided with generation boxes (3, 5). Ultrasonic waves are used to electrolyze a liquid, such as water, hydrogen peroxide or oxygen, in the generation boxes (3, 5), so as to further generate hydroxyl radicals.
C: A disinfection and sterilization system and a sterilization method. The disinfection and sterilization system is based on a sterilization gas generating apparatus (11). The sterilization gas generating apparatus (11) comprises a hydroxyl radical generating part, a mixing part, and an enhancing part. Hydroxyl radical mist generated in the hydroxyl radical generating part is introduced into the mixing part and then mixed with ozone. The mixing part is in communication with the enhancing part so that the mixed mist is further introduced into the enhancing part. A first ultraviolet lamp (6) used for exciting and/or degrading ozone is provided within the enhancing part. The sterilization gas generating apparatus (11) is combined with other apparatus and applied in various different application scenarios for disinfecting and sterilizing the environment and human body. The employment of the mixture of ozone and a hydroxyl radical for sterilization not only provides strong oxidation capability and a great sterilization effect, but also is environmentally and physically friendly, avoids the generation of secondary pollution and side effects, and is broadly applicable.
D: Provided are a method and apparatus for producing nitrogen and oxygen by means of cryogenic distillation of air. Nitrogen products are extracted only from the top of a tower (11). If a customer needs nitrogen with lower pressure, part of pure nitrogen (124) which is partially located at a first nitrogen product pressure is reheated in a main heat exchanger (1), then decompressed to a second nitrogen product pressure by means of a nitrogen expander (23), further reheated by means of the main heat exchanger (1), and output as a low-pressure nitrogen product. The nitrogen expander (23) can be braked by an expander booster (24) for compressing air. By means of the method, nitrogen with different pressures can be suitably produced, and moreover, the energy consumption for producing the pressurized air can be reduced by utilizing the expansion work of nitrogen.
Answer: D