Methods to reduce and eliminate the resistance of the primary cooler
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Are there any other methods, besides steam cleaning, hot gas cleaning, and tar mixture spraying, to reduce and eliminate the resistance in the primary cooler during routine operations? Please share your opinions and specific approaches.
The best method is to use hot ammonia solution for spraying in order to clean the tubes of the cross-cooler of deposits such as carbon deposits and tar.
1# fangfei*nsheng, OP: For hot gas cleaning, what temperature should the gas reach? How effective is it?
We don’t have hot gas cleaning here, and we’d like to know how it’s done! Our factory uses hot ammonia solution for cleaning when the resistance of the primary cooler is high! Normally, control the temperatures of the upper and lower sections of the primary cooler properly, and adjust the temperature of the liquid sprayed in the lower section! It enables the primary cooler to maintain a low resistance level for a longer period of time! ! !
Intermittently spray recycled ammonia water or gas condensate liquid. The increased resistance is due to the deposition of naphthalene and tar
Hot gas cleaning is relatively convenient; it suffices to stop the cooling water supply in each section, and the temperature behind the device can be raised to around 70 degrees. However, this method introduces a large amount of tar and naphthalene into the subsequent systems
Are there any operating standards for using hot gas to clean the primary cooler? I understand that Xinyu Iron and Steel uses hot gas for this purpose, but it also has a significant impact on the subsequent systems.
There are no standards; it relies entirely on experience. Initially, this method was used for cleaning when the cooler resistance was greater than 2 kPa, while hot ammonia water is used for regular cleaning.
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Is the primary cooler at Minister Han’s location also sprayed in two stages? I would like to ask what the requirements are regarding the flow rate, temperature, and quality of the liquid in the following section