Gas pipeline valves

I have been working on the cleaning of coal tar equipment for many years. On various coal tar forums and industry discussion groups, I often see people asking about the problem of inadequate heat exchange efficiency in such equipment. Upon further investigation, it turns out that in most cases this is due to the fact that the equipment has not been cleaned properly, or the cleaning method used is incorrect. Is cleaning coal tar equipment really that complicated? Why then do so many pieces of equipment still not achieve satisfactory results after cleaning? Today, let’s discuss how you carry out the cleaning of your coal tar equipment, what cleaning methods you use, and what cleaning products are employed. Coal tar is commonly found in various coal processing and coking industries. When it is used for further processing or refinement, a wide range of heat exchange devices are employed. Due to its viscous nature, some of the coal tar tends to stick to the surfaces of these devices during heat exchange processes; over time, this leads to the formation of deposits that are difficult to remove. Such deposits reduce the heat exchange efficiency of the devices and affect the normal operation of the enterprises. Many manufacturers wait until problems arise before starting to maintain their equipment, rather than checking or cleaning it every time it is serviced. If the heat exchange efficiency becomes insufficient, it indicates that the buildup of deposits inside the devices is already quite severe. So how should this problem be solved? Some companies simply replace the equipment (as they have the means to do so; if your company is in the same situation, you can ignore the following text), while other companies opt to use certain cleaning products to clean it. When choosing cleaning agents, people may consider various factors such as cleaning costs, cleaning effectiveness, and the degree of corrosion they cause to equipment. From various forums, I’ve learned that many companies still use the most basic alkaline or acidic cleaning products to clean coal tar equipment. It makes me laugh when I think about this – no wonder the heat exchange efficiency of such equipment isn’t satisfactory after cleaning. As we all know, alkaline substances are effective at removing oil; they can clean away some types of oily residues that are liquid in nature. However, such liquid oils usually don’t adhere to the surfaces of equipment, and thus don’t significantly affect heat exchange efficiency. What actually affects heat exchange efficiency are the harder, less fluid forms of coal tar. Using alkaline cleaning agents on these substances is like just skimming the surface at best, so it’s normal for the equipment’s heat exchange efficiency to remain poor. Of course, it’s understandable why many users opt for alkaline products for cleaning; but what’s their reasoning for using acidic products? There is indeed caking inside the equipment, but it’s oily caking rather than scale; using acidic products for cleaning will not have any effect, and if not used properly, it can even cause corrosion to your equipment. At this point, you might think that there is no product available in the world that can clean coal tar deposits. In fact, abroad, solvent-based products have been used for cleaning equipment for many years already. After being improved by Zibo Haoyuan Environmental Protection Technology Co., Ltd. as well as through numerous cleaning experiments over the years, these solvent-based products are now being used on a large scale in the market. They overturn the traditional characteristics of water-based products, offering advantages such as being non-flammable and non-explosive, capable of completely dissolving hard deposits, being environmentally friendly, and being reusable. They can be used on various types of heat exchangers, including spiral plate heat exchangers and tube-type heat exchangers, as well as electric tar removers, benzene washing towers, pre-coolers, coal tar storage devices, and coal tar transportation pipelines. Tests have shown that equipment cleaned with these solvent-based products can achieve a cleanliness level of over 98%. If your company does not have enough funds to replace its equipment, you might want to give these cleaning agents a try. Ultimately, coking in coal tar equipment is not something to be feared, and it’s not difficult to choose a cleaning agent either; as long as you make the right choice, there is no equipment that cannot be cleaned. Of course, coking in coal tar equipment does not develop over just a day or two. Therefore, the editor recommends that you check whether your equipment is showing signs of coking during each maintenance session, so that any issues can be identified and addressed promptly, thereby avoiding wasted time and money in the long run. The above was compiled by the technical department of Zibo Haoyuan Environmental Protection Technology Co., Ltd. For more interesting content, visit http://www.sunpower-china.com/ and http://www.hbqx365.com. You are also welcome to call the company’s 24-hour technical hotline at 17605336135 or 15853397667 for further inquiries.