Analysis on the Development Trend of Cleaning Agent Technology at Home and Abroad

Technical Gap of Cleaning Agent at Home and Abroad in 1. and Its Reasons (1) Technology gap analysis Although my country's industrial cleaning industry has made great progress with the vigorous development of my country's industrial economy over the years, its technical capabilities and technical equipment have made great progress, but there is still a big gap compared with industrialized countries and developed countries, especially in the support of science and technology. In terms of industrial development, there are still serious deficiencies, mainly in the following aspects: First, heavy equipment or technology introduction, light digestion and absorption and innovation, technical equipment research and development capacity is insufficient. Because the industrial cleaning technology belongs to the application technology, there are many mature application technology and equipment abroad, and the large-scale cleaning equipment with high technical difficulty, especially the key technical equipment, is almost imported from abroad. The development of new products in China's industrial cleaning industry has not really got rid of the situation of tracking imitation, and the problem of weak innovation ability is more prominent. Second, there is a serious shortage of investment in science and technology. As 80% of enterprises in the industrial cleaning industry are small and micro enterprises, and their service areas are scattered, their research strength and scientific research motivation are generally low. At the same time, government funding and professional industrial services are relatively small. Third, the development of energy-saving and environmentally friendly cleaning technology is relatively backward and cannot support the development of the industry. Due to the lag of development work and the low level of technology, it leads to the high energy consumption and high pollution in the production process of cleaning products and cleaning projects. The development of new environmental protection, pollution-free and low-cost green cleaning technology has become the inevitable development trend and competitive conditions of the cleaning industry. Fourth, the lack of industry standards and industry norms. Industrial cleaning industry is a new industry developed with the progress of science and technology and the gradual subdivision of modern industry. At present, there are only five national standards that domestic industrial cleaning enterprises can refer to and implement, and only three industry standards that can be referred to from the petroleum and chemical industries, which simply do not meet the general requirements of cross-industry services. At the same time, there is a lack of production safety standards and operation systems with industry characteristics, and the industry-based safety management and safety supervision mechanism has not yet been established, resulting in a situation where some operations have no rules to follow and some services have no standards to follow. Fifth, the industry employees have low cultural level, high mobility and low skill level. The industrial cleaning industry is an emerging industry developed by the popularization of new technologies, and it is still a labor-intensive industry. At present, the quality of employees in the industry is not optimistic. The front-line staff have junior high school education in the majority, high school and secondary professional school education in the minority, and those with college education or above are rare. Due to the high intensity of cleaning site work, poor working environment, slightly higher education and can adapt to the complexity of on-site work personnel, do not want to engage in the specific work of cleaning line. At the same time, for enterprises, they can not recruit high skilled talents when they are in urgent need on the spot. After sending the existing low quality personnel to professional training, their ability has been improved, and it is easy to change jobs and flow. The bottleneck of excessive talent mobility in the cleaning industry has seriously restricted the healthy development of the industry. (2) Reasons for the gap Domestic cleaning equipment enterprises awareness of scientific and technological innovation remains to be improved. From the perspective of the production of high-pressure water cleaning equipment and its supporting accessories, there is indeed a certain gap between domestic enterprises and developed countries such as Europe and the United States, lack of innovation consciousness, insufficient investment in research and development funds, and the old concept of "one drawing for ten years" still exists, ultra-high pressure There are still blind spots in areas above (3000bar) and high power (500kW).

Advantages of ultrasonic cleaning

The application of ultrasonic cleaning technology in the cleaning of automobile engine cylinder blocks and parts. Compared with traditional cleaning methods, ultrasonic cleaning has the following advantages: 1. Clean more thoroughly The principle of ultrasonic cleaning technology shows that this method is very suitable for cleaning complex components such as engine cylinder block and cylinder head. If such parts are cleaned manually, there are many parts that are difficult or impossible to clean, and the use of tools cannot achieve good cleaning results. The cleaning agent can only dissolve part of the dirt, and it is also powerless for stubborn dirt and dirt inside the parts. Ultrasonic technology cleaning is a wonderful physical cleaning method, like countless small brushes cleaning the inner and outer surfaces of the object at the same time, so that the cleaning of the inner surface and the inner hole that cannot be completed by the traditional method can be completed at one time. 2. Safe operation and energy saving Small parts of the current use of gasoline or diesel cleaning, so the operation of the safety factor is very low, easy to cause accidents. And ultrasonic technology cleaning using water-based cleaning agent, no accident hidden danger. 3. High work efficiency Just disassemble the parts and put them in the wire mesh basket of the cleaning machine and press the switch. During the cleaning process, the maintenance personnel can do other work. 4. Low cleaning cost Due to the high reuse rate of cleaning agents and cheap procurement of consumables, the cleaning cost is generally only 1/3 to 1/8 of the traditional cleaning method.

ODS Elimination in China's Cleaning Industry

（1）ODS 淘汰背景       从 1992 年起，中国开始了清洗行业 ODS 淘汰，截止到 1999 年 10 月，中国共有 22 个 ODS 清洗淘汰项目得到多边基金资助实施有关淘汰活动，预计项目完成后可淘汰 ODS 折合 920 吨 ODP。但是，清洗行业企业众多，通过数年的淘汰发现，清洗行业 0DS 淘汰面临不少的困难。主要体现在以下几个方面:①目前清洗行业没有足够的符合中国国情的经济合理的替代技术供企业选择。②0DS 清洗剂消费企业数量庞大、分布分散，淘汰工作的管理复杂。③企业缺少对 ODS 淘汰的了解。尤其是企业对在 ODS 淘汰过程的责任和权益不了解。       中国正处于经济快速、稳定发展时期，而清洗行业 0DS 的淘汰涉及电子、信息、航空、航天等高技术行业的发展；如何在不影响中国经济快速发展的情况下，以最有效的方式淘汰 ODS 清洗剂，是中国保护臭氧层行动的一个重要问题。为了防止 ODS 清洗剂消费量的进一步增长，进而实现 ODS 清洗剂的逐步淘汰，尽快制定整体淘汰计划，并予以实施是非常必要的。 （2）ODS 淘汰项目分析        中国 ODS 清洗行业包括用于电子、邮电、航空、航天、轻工、纺织、机械、医疗器械、汽车、精密仪器等所有使用 0DS 作为清洗剂的企业和所有生产 ODs 清洗剂的企业。 为履行《议定书》规定的各项义务，实现 ODS 生产和消费的淘汰，1993 年中国成立了由 18 个部委组成的“臭氧层保护领导小组”。随着 ODS 清洗剂淘汰的进一步深入，1997 年中国成立了由原国家环保局和原电子部为主的清洗行业淘汰 ODS 特别工作组，由该工作组负责 ODS 淘汰的日常管理工作，组织和实施ODS 清洗剂的淘汰，包括组织替代品、替代技术的研究和开发，回收管理，以及相关行业政策的研究、开发、颁布和实施与监督等。 根据《中国电子清洗及其他工业清洗逐步淘汰 ODS 战略研究》，中国有上千家企业消费 ODS 清洗剂。主要的清洗对象包括四大类，即精密清洗、PCB 清洗、金属清洗和其他用途。        在多边基金的资助按期提供的前提下，中国政府承诺通过实施行动计划完成ODS  的淘汰。中国将完全淘汰 ODS   的生产和消费，即通过生产配额制度和赠款招标机制逐步削减 ODS 的生产，通过赠款招标机制逐步削减 ODS 的消费。中国淘汰 CFC—113 的时间表、资金需求和主要淘汰行动内容参. （3）ODS 淘汰时间表        对于 ODS 清洗剂的淘汰，中国已经采取了一系列的措施。这些措施包括: 1995 年由原电子部下发《关于做好 1995 年电子工艺工作的通知》中，明确要求各级电子工业主管部门、直属研究所从改革工艺人手，积极淘汰 ODS； 1997 年由原国家环保局、国家计委、国家经贸委、国家工商局联合下发《关于禁止新建生产、使用消耗臭氧层物质生产设施的通知》；1997 年由原国家环保局下发《关于全面推行排污申报登记的通知》，将 ODS列入排污登记名单；1998 年 2 月开始，在《中国电子报》开辟专栏，宣传 ODS 清洗剂淘汰进程、替代技术现状和相关政策；在 UNDP、瑞典、日本、加拿大和美国等支持下，面向企业，多次举办 0DS清洗剂替代技术研讨会；通过会议、电视、报纸、广播等其他媒介大量开展宣传活动等。 （4）ODS 淘汰计划          行业淘汰目标是:①从 20 凹年开始至 2006 年 1 月 1 日前，按等量实施线性淘汰，全部淘汰 CFC—113 生产(含进口)和消费；②在 TCA 淘汰增加费用补充方案得到批准的前提下，从 2002 年开始至 2010 年 1 月 1 日前，按等量实施线性淘汰，全部淘汰 TCA 生产(含进口)和消费。为确保淘汰目标实现，区别对待大中小企业。根据淘汰时间表，首先淘汰大中型 ODS 清洗剂消费企业；对于小消费企业，将通过建立淘汰支持网络系统， 通过提供咨询、技术服务、设备优惠等措施实施淘汰，并采取生产和消费同步淘汰的战略，从生产厂家和最终消费者同时进行淘汰。         选择适合中国国情的替代技术，对需要不同替代技术的清洗子行业采用先易后难、先低成本后高成本的模式。最大限度地实现替代技术国产化，降低淘汰成本。替代技术的选择原则为:①所有替代技术应该是对臭氧层和环境无害；②不鼓励用低 ODP 值及高 GWP 值物质替代现有 ODS 清洗剂；②替代品和替代技术必须不影响工人安全和健康；④替代品和替代技术至少应保持不低于原技术的清洗能力；⑤替代技术必须是费用有效的。 （5）行业淘汰策略分析        为了按照本计划实现清洗行业 ODS 的淘汰，中国政府将采取生产和消费同步控制和淘汰措施，即从生产厂家和进口、最终消费者同时进行淘汰。区别对待大中消费者和小消费者，区别对待国内企业和外资(合资)企业。 具体淘汰措施如下: (1)宣传，总结和推广已经实施项目的经验，大力开展培训和宣传活动，消除企业对 ODS    淘汰的心理障碍，鼓励企业积极参加 ODS 淘汰； (2)建立和加强替代技术支持系统，尤其是为中小企业提供替代品和替代技术选择、技术咨询等服务； (3)控制 ODS 清洗剂生产和进口，按照淘汰时间表，以配额管理方式减少 ODS 清洗剂的生产；建立 ODS 清洗剂进出口登记制度，按淘汰时刻表禁止 ODS 清洗剂进出口； (4)控制 ODS 清洗剂消费， ①根据淘汰时间表，首先淘汰大中企业(消费企业)； ②对于小消费企业，通过宣传、禁令以及替代技术支持系统，实现 0DS 清洗剂淘汰； (5)其他辅助淘汰措施包括: ①继续引进国外的替代技术和淘汰管理经验； ② 推动替代品和替代技术的研究和开发，推动替代品和替代技术市场发展； ②制定替代品和替代技术的技术指标、实施标准和操作规范； ④制定并颁布确保淘汰顺利实施的政策、法规和措施； ⑤建立行之有效的监督和实施体系，包括开发管理信息系统，确保淘汰计划的实施。

Development of Vacuum Cleaning Technology

       1.脱出清洗剂中的空气，减少超声波的衰减。为提高清洗效果，清洗机中一般都采用超声波技术，利用超声波振子每秒钟几万次频率的振动，发出超过人耳可听见的 10 万倍以上的声压。在清洗的情况下超声波在液体中呈放射状，使清洗液体流动而产生大量的真空气泡，这种现象就是空穴作用。由这种空穴作用而产生的液体流动和数以万计的高压真空气泡瞬间爆破时产生的能量，不断地冲击被清洗物表面，使表面及缝隙中的污垢迅速剥落。但在常压状态下，清洗剂中溶解的空气粒子遇到超声波时产生气泡，超声波的空穴作用会被大幅度衰减，清洗效果被减弱。在真空状态下，清洗剂中的气体会被脱出，从而避免了超声波的衰减。这一效果可以从铝箔实验中得到验证：在清洗槽中分别加入未经真空脱气和经过真空脱气的碳氢清洗剂，使用相同功率的超声波对铝箔清洗一分钟，结果未经脱气的清洗剂可见轻微的震动，铝箔基本上无变化。而经过真空脱气的清洗剂剧烈震动，铝箔很快出现许多孔洞.        2.排除工件表面和孔隙中的空气，提高清洗效果。在传统清洗中，清洗效果不理想常常是因为盲孔、粗糙表面和细小缝隙中的空气不能排出，影响清洗剂的浸润，产生清洗盲区。应用真空技术后，可使部件表面、缝隙和盲孔内的空气全部排出，使清洗剂完全浸入工件的每个部位，使工件的各个部位都达到最好的清洗效果。对于构造复杂、盲孔较深的工件，通过两次以上的抽真空和排气过程， 也可以将空气全部排出。所以在真空状态下，清洗效果要比常压下更好。       3.降低沸点使碳氢清洗剂也可以实现气相清洗。使用卤代烃清洗剂的超声波清洗机，利用卤代烃清洗剂沸点低的特点，在清洗的最后一步，将清洗剂加热使之产生纯净的清洗剂蒸汽，用溶液蒸汽对工件进行气相清洗，使溶解在清洗溶液中的油污不会残留在工件表面。由于碳氢清洗剂的沸点高于闪点，在常压状态下不可能对工件进行蒸汽清洗。真空清洗干燥机利用液体在真空状态下沸点降低的原理，通过对密封的清洗槽抽真空，使碳氢溶剂的沸点大大降低，只需将碳氢清洗剂加热到 80℃左右，就可使其沸腾，实现气相清洗。        4.利用真空突沸效应，提高干燥速度。由于碳氢清洗剂的沸点都在 140℃以上，在常温常压下彻底挥发一般需要一小时左右。这样的干燥速度肯定不能满足工艺清洗的节拍要求。而用加热烘干的方法又容易产生火险，这也是碳氢清洗剂在中国未得到广泛应用的主要原因之一。真空清洗干燥机一般是将蒸汽清洗与真空干燥在一个槽中进行，在对工件进行蒸汽清洗的同时使工件温度升高，然后使干燥槽迅速进入更高的真空状态，工件表面的清洗液会突然沸腾（真空突沸效应） 而迅速挥发干净。这样可以将工件的干燥时间降低到 1 分钟以内。         5.真空蒸馏，使碳氢清洗剂再生重复使用。清洗剂的蒸馏再生，就是利用清洗剂与污垢之间的沸点差，将溶有油污的清洗剂加热到清洗剂的沸点以上而控制在油污的沸点以下，使清洗剂汽化，然后通过冷凝装置使之重新凝结成纯净的清洗剂，而沸点较高的油污和机械杂质则留在蒸馏罐的底部。卤代烃清洗剂由于沸点低且不可燃，蒸馏再生相对容易，所以，许多卤代烃清洗剂都附带有蒸馏再生装置。而碳氢清洗剂由于沸点高而闪点较低，在常压下蒸馏再生是不可能的。真空清洗干燥机的蒸馏再生装置在高真空下使碳氢清洗剂的沸点降低到 80℃， 使清洗槽中溶解了油污的清洗溶液不断地抽入蒸馏装置，在真空中加热蒸发，再经过冷凝成为清洁溶剂回到清洗槽中，使清洗液始终保持清洁状态。油污则留在蒸馏装置底部，定期排出。        6.隔绝氧气，使碳氢清洗剂失去燃烧的条件。绝大多数碳氢清洗剂闪点都在 50℃左右，在我国《常用危险化学品的分类及标志》中属于高闪点易燃液体。虽然闪点较高，但在高温或有助燃物（如纸和棉絮）的情况下仍有燃烧危险。因此控制火险成为其推广使用必须解决的问题。燃烧需要有可燃物、温度和氧气三个必要条件，只要缺少一项，燃烧就不可能发生。在真空状态下氧气含量极低， 在清洗、干燥和蒸馏再生的过程中，既使碳氢清洗剂的温度达到闪点以上，由于没有氧气，失去了燃烧的一个必要条件，碳氢清洗剂也不会燃烧，从而保证了使用安全。

Analysis of ODS elimination in cleaning industry in Japan

(1) Overview of ODS phase-out Japan began to restrict ODS production and circulation in 1989 and completely eliminated ODS by the end of 1995. (2) Alternative technology and product development 1) Development of hydrocarbon cleaning agent The residual solvents obtained by distillation of crude oil are petroleum, petroleum hydrocarbons, hydrocarbon systems, hydrocarbons, industrial gasoline and other terms, the definition of which is still unclear. Hydrocarbons, as the name suggests, are just compounds composed of two elements. In the past, the lamp oil obtained by simple distillation and refining of crude oil was used directly as a cleaning agent, but it has gradually not been used due to odor, ignition and dryness. Hydrocarbon cleaning agent has good environmental characteristics and cleaning ability, and has gradually become one of the important industrial cleaning agents. Hydrocarbon cleaning agent is a new type of non-toxic, efficient and environmentally friendly cleaning agent, which is a kind of cleaning agent vigorously promoted by the state. From the call of the country to the response, many companies have now begun to use environmentally friendly cleaning agents, thus giving birth to a large number of enterprises engaged in the sale of environmentally friendly cleaning agents. In 1997, they vigorously responded to the introduction of national policies: hydrocarbon high-efficiency cleaning agents (called carbonized water in foreign countries), which are harmful to human body and environment, are reduced to a minimum and conform to WEEE and ROHS standards. Disadvantages of hydrocarbon cleaning agents: The most worrying thing is that the flash point of hydrocarbon cleaning agents is low and flammable. Although hydrocarbon cleaning agent has many advantages, but compared with ODS cleaning agent, its high boiling point (150~190 ℃) and low flash point (50~70 ℃). Although the higher boiling point can reduce the volatile loss of the cleaning agent during storage, transportation and use, it also greatly reduces the drying speed of the workpiece after cleaning, making it difficult to regenerate the cleaning agent by distillation. The lower flash point increases the fire protection requirements in cleaning, drying and distillation regeneration.

A Brief Introduction to the Development of ODS in Detergent Industry

(1) Introduction to ODS in the cleaning agent industry Ozone (O3) is a gas that oxygen in the air becomes during discharge or under the irradiation of ultraviolet rays from sunlight. The ozone layer is a kind of ozone gas layer, which exists in the stratosphere 10km ~ 50km from the earth's surface. It can absorb most of the ultraviolet rays in the sunlight, so it can avoid the damage of ultraviolet rays to people and other creatures on the earth. Ozone is very easy to react with other substances, so it is also easy to be destroyed in chemical reactions. In the 1970 s, two scientists in the United States first noticed that human-made CFCs may be related to the destruction of the ozone layer, and further discovered that CFCs released into the atmosphere will stay in the atmosphere for about 10 years., And eventually rise to the stratosphere. In the stratosphere, when exposed to ultraviolet light, chlorine atoms are separated from fluorine and chlorine atoms and react with ozone to decompose them into oxygen and chlorine monoxide; chlorine monoxide then reacts with free oxygen to form chlorine atoms to begin the next cycle. This reaction is repeated, so that a chlorine atom can destroy tens of thousands of ozone molecules, breaking the original dynamic balance of the ozone layer. Over time, the amount of chlorofluorocarbons released into the atmosphere continues to increase, the amount of ozone decreases sharply, and the ozone layer becomes thinner and thinner, resulting in more ultraviolet light entering the biosphere on the earth's surface. In fact, substances that destroy the ozone layer are not unfamiliar to us, and they are almost everywhere in daily life. Refrigerators, air conditioners, electronic products, fire-fighting equipment, tobacco, foam, hair spray, pesticides and other products in the production process or use process, people use a large number of artificial chemicals have the ability to destroy the ozone layer. Scientists refer to these chemical substances that destroy the atmospheric ozone layer and endanger the living environment of human beings as "ozone depleting substances" (ozone depleting substances), referred to as ODS. (2) Major ODS substances in the industry At present, ODS in large use mainly includes the following types of substances: perchlorofluorocarbons: mainly used as refrigerants, cleaning agents and foaming agents; halons: mainly used as fire extinguishing agents; carbon tetrachloride: mainly used as additives and cleaning agents in chemical production; methyl chloroform: mainly used as cleaning agents; methyl bromide: mainly used as pesticides in agricultural planting, food storage or commodity quarantine; and hydrochlorofluorocarbons: mainly used as refrigerants, cleaning agents and foaming agents. These substances have different abilities to destroy the ozone layer. In order to facilitate measurement, scientists have established the ozone layer destruction potential value (ODP value) for these substances through scientific experiments. Halons are the most ozone-depleting, followed by carbon tetrachloride, perchlorofluorocarbons, methyl chloroform, methyl bromide and hydrochlorofluorocarbons. If we want to protect the ozone layer, we must first reduce the emission of these man-made chemicals into the atmosphere. Another: two kinds of flurion (I. e., chlorofluorocarbons CCl3F and CCl2F2) can destroy the ozone layer, mainly because these substances can release atomic chlorine as a catalyst to turn ozone into oxygen. (3) Cleaning objects involved in ODS China's ODS cleaning industry includes all companies that use ODS as a cleaning agent for electronics, post and telecommunications, aviation, aerospace, light industry, textiles, machinery, medical equipment, automobiles, and precision instruments. The two main ODS cleaners are CFC-113 and TCA.

Prospect of charged cleaning technology

At present, China's energy consumption shows a growing trend. In response to the concept of sustainable development, the state sector has put forward new indicators and requirements, and the energy-saving development of the power industry has provided new development challenges for cleaning technology, and it is also a development opportunity for the cleaning industry. In the insulation care of power equipment, due to the influence of static electricity, dust, moisture, oil and other dirt, the equipment will reduce its insulation performance during operation, resulting in hidden dangers of safe operation often occur. In large-scale power safety accidents, the insulation performance has a high influence on it, and it is also an important guarantee for the safe operation of power equipment. If the insulation care work is not in place, the external harsh environment will cause a certain degree of constraints. To this end, the charged cleaning technology provides new conditions for its reform, the use of new cleaning agents to quickly achieve power equipment dirt treatment, simple operation procedures and do not have damage to the component defects, after rapid cleaning can eliminate the components of poor sensitivity, poor heat dissipation and other faults, enhance the internal insulation performance of the equipment, to maintain the normal operation of electrical equipment, which is also the key application areas of the current charged cleaning agent technology.

Development history of charged cleaning technology

Since the development of live cleaning technology in China, it has gone through several different stages. The first stage was from 1986 to 1993. At this stage, peers produced many products that represented the highest level at that time. With the support and cooperation of the majority of scientific and technological workers, many enterprises have understood and partially used live cleaning agent series products. However, at this stage, as China's state-owned enterprises are in the process of changing the mechanism, at the same time, as a new concept and technology, live cleaning has not been accepted by people, live cleaning is still facing the process of changing an inherent consciousness, and live cleaning products are still on the level of continuous improvement and improvement. Therefore, most of the live cleaning products at this stage are mainly used in the operation of power failure cleaning, it does not really give full play to its advantages, nor does it show the characteristics it has to the market. In spite of this, colleagues have unremittingly spread the seeds of the concept and technology of live cleaning to the north and south of the river, so that a considerable number of technicians have heard, seen and tried live cleaning products. Therefore, when the live cleaning technology has developed to this stage in China, the price paid by the peers at that stage is heavy and unforgettable. It is their efforts that have laid the foundation that we can have today. At this stage, except for some sporadic live demonstration, there is no substantial live cleaning project. The second stage was from January 1994 to 1997. At that time, the hotel shower gel company, with the efforts of its peers, carried out large-scale live cleaning of the program-controlled switch for the first time. Today, I still admire its determination to be the first in the world. The Shenzhen-University Telephone Company was the only joint venture in the telecommunications industry at the time, and almost all of their equipment was imported. Under the conditions of the time, it was difficult to accept large-scale live cleaning of program-controlled telephone exchanges. From the contact to the formal signing of the contract, the project has carried out more than 50 demonstrations, explanations, coordination, and its spirit is valuable, which still makes us awe! It is based on this that China's live cleaning technology has been applied to equipment maintenance in the telecommunications industry on a large scale for the first time, opening the most difficult first page of large-scale live cleaning precision electronic instruments. This valuable spirit of perseverance has always inspired us to overcome difficulties, to work hard and to work hard. At this stage, live cleaning and maintenance equipment has been started in the telecommunications industry. For example, Shenzhen University Company, Chongqing Telecom, Zigong Telecom, Beijing Telecom and other telecommunications departments have begun to accept live cleaning technology, but it is still recommended on a small scale. The cleaning volume of fixed phones in this stage of hotel shampoo is about 500,000 households. The third stage should be from 1998 to 2002. Our counterparts in the live cleaning industry have accumulated a lot of experience that can be improved and used for reference. These experiences have also been guiding our on-site work. At this stage, the inherent quality, scientific and technological content and environmental protection characteristics of the products have laid a solid foundation for the construction of a new industry in China. And then led to how to ensure the safety of charged cleaning in the scientific sense, how to ensure more scientific operation in the cleaning site, how to use the hotel body lotion to control the whole process of charged cleaning technology and so on a series of charged cleaning technology difficult problems.