In the convection section of olefin furnaces, different bundles have been considered in order to recover the heat produced in the radiation section. The SHP steam superheater bundle is responsible for superheating the produced steam in TLEs and regulating the temperature of the sent steam using BFW water injection. Currently, the output temperature of this bundle is lower than the design, which has led to the complete closure of the BFW water injection path and the increase in gas consumption of the furnaces. This incident has resulted in a decrease in the steam produced by the furnaces and an increase in the steam received from Fajr. Therefore, finding a suitable method for cleaning this bundle and increasing its thermal efficiency can bring significant economic savings in steam consumption. Among the other problems that have arisen, we can mention the high temperature of the stack of the furnaces (its environmental crimes), the working of the blowers of the furnaces in 100% design conditions, and the increase in the fuel consumption of the furnaces. With convection section cleaning, it is possible to improve these problems and reduce the costs caused by them.

Suggested cleaning methods:

1. Robotic Convection Zone Cleaning The mobile robot is located on the upper row of the bundle through the access hatches and by sending the nozzle to the lower parts, it provides the possibility of cleaning all the tubes.
2. Cleaning with foam (Foam Technology) is a cleaning method with low pressure spraying of foam, which will lead to the removal of impurities and particles on the coils by breaking down organic and mineral binders. In this method, it is claimed that there is no restriction in terms of access and its main advantage is not using water in the washing process.
3. Soot blower is a device that is used in industrial furnaces, steam boilers and other heat exchanger equipment to remove soot, ash and other deposits. Soot was designed to clean and maintain the cleanliness of these surfaces.
4. Sonic soot blower method Sonic soot blower, also known as acoustic soot blower or sonic horn, is a specialized cleaning device used in industrial furnaces, boilers and other heat exchanger equipment to remove soot, ash and other deposits are used on the surfaces of heat transfer tubes. Other components of these deposits can accumulate over time and reduce heat exchange efficiency, leading to reduced performance and increased fuel consumption. Acoustic soot blowers use high-frequency sound waves (ultrasonic or sonic) to generate pressure waves within sediments, moving and removing them.