Waste heat boiler of catalytic unit

The deterioration of the overall heat exchange efficiency of a waste heat boiler can be caused by the following factors: 1. **Scaling or blockage on the flue gas side**: Impurities such as dust and sulfides in the flue gas form scale on the heat exchange surfaces, reducing the efficiency of heat exchange. The solution is to clean and maintain the heat exchanger regularly. 2. **Aging or damaged pipes**: Over time, pipes may become corroded or damaged, thereby affecting heat transfer. It is necessary to check the integrity of the pipes and replace any damaged parts promptly. 3. **Changes in operating conditions**: If the type of fuel or the combustion method changes, it may lead to variations in flue gas temperature and composition, thereby affecting the heat exchange efficiency. It is necessary to adjust the operating parameters to adapt to the new working conditions. 4. **Unreasonable heat exchanger design**: If the actual operating conditions are not adequately taken into account during the initial design of the heat exchanger, it may result in poor efficiency. It is possible to consider redesigning or optimizing the heat exchanger layout based on the actual conditions. 5. **Circulation system issues**: Problems such as insufficient flow rate of the circulating medium or decreased performance of the circulation pump can all affect the heat exchange efficiency. Inspect the circulatory system and carry out necessary maintenance and upgrades. In response to the various possible causes mentioned above, it is very important to conduct regular system inspections and maintenance. By having qualified technicians conduct a comprehensive assessment of the boiler system and taking appropriate maintenance or improvement actions based on the results, the heat exchange efficiency can be effectively improved and the equipment’s service life extended. .

Shut down the furnace to check for scaling, and clean it.

Scaling inside the heat exchange tubes; catalyst dust accumulating on the outside of these tubes; poor soot blowing efficiency. Address the issues appropriately to eliminate the problems

In my opinion, it’s possible to conduct an analysis of the dust in front of the furnace to determine whether it’s the centrifuge – whether it’s a regenerated one with three or four stages – that has reached the end of its useful life and is experiencing severe leakage. Secondly, it’s important to use soot blowers on a regular basis; I’m not sure exactly which part of the heat exchange system is not functioning properly, so increasing the frequency of soot blower usage might help improve the situation. The third water quality issue is to check whether the salt content is high, which could lead to internal scaling. Generally speaking, this shouldn’t be a major problem.