应用场景：多晶硅装置投产前清洗、煤制油装置投产前清洗、甲醇装置投产前清洗、烯烃装置投产前清洗、炼油装置投产前清洗、醋酸装置投产前清洗，合成氨装置投产前清洗、电站锅炉化学清洗、化工装置停产检修化学清洗等应用。Applications: cleaning, coal oil, methanol plant put into operation before the cleaning device put into operation before the cleaning, olefin plant put into operation before the cleaning, cleaning, oil refining plant put into operation before the acetic acid plant put into operation before the cleaning polysilicon plant start-up, boiler cleaning, chemical cleaning, chemical plant shutdowns of chemical cleaning applications such as synthetic ammonia production.
适用设备：换热器、凝汽器、精馏塔、再沸器，冷凝器，合成塔、蒸氨塔、反应釜、管线、锅炉、过热器、空冷器、设备夹层、储罐、机泵阀门等设备Applicable equipment: heat exchanger, condenser, rectification tower, reboiler, condenser, synthetic tower, ammonia tower, reactor, pipeline, boiler, superheater, air cooler, equipment interlayer, storage tank, pump valve and other equipment.
The application of chemical cleaning before the chemical plant is put into operation
化工装置开车前清洗，就是大型化工装置在投产前，对所有工艺管道，换热器，塔器，槽罐等进行全面的化学清洗和钝化处理。主要两大作用，一是保证设备和管道清洗后表面无污垢，无焊渣，无油脂，无杂质等污垢，该污垢严重影响工艺产品的成品质量。投产后不能短期产品合格而造成的损失。二是保证设备和管道的表面钝化预膜处理，保证管道和设备的耐腐蚀和运行安全。管道和设备的外表面有喷漆等很多防腐技术，但工艺设备内表面目前普遍采用化学钝化的方式进行保护处理。钝化预膜后能在金属表面形成致密的保护层。保护设备不发生氧化反应和物料腐蚀，保证设备的运行安全和延长设备的使用寿命。其价值意义深远。Before the start-up of a chemical plant, chemical cleaning and passivation of all process pipelines, heat exchangers, towers and tanks can be carried out before large-scale chemical plants are put into operation. There are two main functions. One is to ensure that there are no dirt on the surface of the equipment and pipes after cleaning, no welding slag, no grease, no dirt and other dirt. The dirt will seriously affect the quality of the finished products. The loss caused by the failure of the short term product after the production is put into operation. The two is to ensure the surface passivation pretreatment of the equipment and pipelines, and to ensure the corrosion resistance and operation safety of the pipes and equipment. There are many anticorrosion techniques on the outer surface of the pipeline and equipment, but the surface of the inner surface of the process equipment is generally protected by chemical passivation. After passivation, a tight protective layer can be formed on the surface of the metal. The protection equipment does not have oxidation reaction and material corrosion, ensures the operation safety of the equipment and prolongs the service life of the equipment. Its value is far-reaching.
化学钝化防腐蚀Chemical passivation and anticorrosion
金属经氧化性介质处理后，其腐蚀速度比原来未处理前有显著下降的现象称金属的钝化。其钝化机理主要可用薄膜理论来解释，即认为钝化是由于金属与氧化性介质作用，作用时在金属表面生成一种非常薄的、致密的、覆盖性能良好的、能坚固地附在金属表面上的钝化膜。这层膜成独立相存在，通常是氧和金属的化合物。它起着把金属与腐蚀介质完全隔开的作用，防止金属与腐蚀介质直接接触，从而使金属基本停止溶解形成钝态达到防止腐蚀的效果。Chemical passivation precoating is to use chemical method to form lethal oxidation protection layer on clean metal surface, so as to avoid the occurrence of the two oxidation corrosion and prevent the occurrence of scale corrosion, so as to protect the surface of the equipment or pipeline.
After the metal is treated with the oxidizing medium, the corrosion rate of the metal is significantly lower than that before the original treatment, which is called metal passivation. The passivation mechanism is mainly explained by the theory of thin film. It is considered that passivation is a very thin and dense passivation film that can be strongly attached to the metal surface on the surface of the metal due to passivation due to the action of metal and oxidizing medium. This film exists as an independent phase, usually a compound of oxygen and metal. It plays the role of completely separating metal from corrosive medium, preventing metal from contacting with corrosive medium directly, so that metals can basically stop dissolution and form blunt state to prevent corrosion.
化学清洗方式Chemical cleaning method
The circular cleaning is made up of two original parallel ash pipes, and a circulating system is formed with the cleaning pump station, adding a certain concentration of cleaning fluid to form a circulating chemical cleaning system.
Open road cleaning
In cleaning, there can not be two pipes to form a loop, only a single pipe pipe is used to open the road.
Non – stop cleaning
This process is a continuous injection of a certain amount of cleaning liquid for open path chemical cleaning in the condition of normal non – stop pipeline or equipment.
化学清洗应用行业Chemical cleaning application industry
电力业、石化业、制药业、纺织化纤业、造纸印刷业、水泥建材业、冶金业、食品业、机械业、餐饮业、煤炭业、石油开采业、核工业、烟草业、公用事业、航空航海The power industry, petrochemical industry, pharmaceutical industry, textile and chemical fiber industry, printing and printing industry, cement building materials industry, metallurgical industry, food industry, machinery industry, catering industry, coal industry, petroleum extraction industry, nuclear industry, tobacco industry, public utilities and aviation navigation.