Do you all use ash cleaning agents for your heating furnaces?
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This post was last edited by Yanzhi Youli on 2012-10-7 at 18:03. For industrial heating furnaces, dust accumulation on the furnace tubes is a common phenomenon; it not only causes an increase in the temperature inside the furnace but also results in energy waste. The following questions are raised: 1. How should the dust on the furnace tubes be removed? 2. Do you use dust removers? What ingredients are in the dust removers you use? 3. How to carry out dust cleaning? Does it affect the furnace lining? My unit is an industrial tubular heating furnace, which is regularly cleaned with descaling agents on a weekly basis. During dust cleaning, a specific dosing device is used to inject the cleaning agent onto the furnace tubes. The descaling agent contains nitrates, and as a result, the NOX levels in the flue gas exceed permissible limits during use, which is not environmentally friendly. Since the furnace lining is made of ceramic fibers, descaling has a significant impact on it.
My unit is a cylindrical tube-type heating furnace, and it is cleaned regularly with descaling agents on a weekly basis. During dust cleaning, a specific dosing device is used to apply the cleaning agent to the furnace tubes in the radiation chamber. After one cycle, it is checked that some of the agent has fallen onto the furnace tubes in the convection chamber, thereby affecting the heat transfer area, as the smoke flow velocity in the convection chamber is very low. You don’t need it anymore.
If there is excessive ash accumulation in the furnace tubes, it can lead to poor heat transfer and high pressure drops. How do people deal with the issue of ash accumulation in furnace tubes?
Adding descaling agents to the radiation chamber yields good results. The convection chamber should be soot-blowed regularly to ensure effective soot blowing. At present, steam soot blowers are still the most commonly used in our factory; they have a relatively high failure rate. There are also some acoustic soot blowers, but their performance in practice is not satisfactory.
Whether it is a tubular furnace or a box furnace, blowers should be properly installed at locations in the heating furnace’s convection chamber or air preheaters for waste heat recovery where finned tubes or spike tubes are prone to dust accumulation. The acoustic blowers are set to clean the dust automatically every 2 hours, with each cleaning session lasting 30 seconds. Another type of soot blower commonly used in refineries is the shock wave soot blower, which generates more energy and produces more noise.
Our GTC company’s online soot cleaning technology uses liquid chemicals to clean the radiant and convection sections of heating furnaces; these chemicals are injected through nozzles to form a very fine mist, and with the help of the smoke flow inside the furnace, it is possible to clean both the front and back parts of the furnace tubes, ensuring thorough and comprehensive soot removal. Those who are interested are welcome to contact me: hyzhang@gtcbeijing.com Mobile: 139 1107 2603 Viki
For online dust removal of boilers and heating furnaces, please contact our company. This solution has been successfully applied in various petrochemical enterprises. Feel free to get in touch: Manager Zhou at 13932740788, QQ: 1422757993, email: zexze@163.com