Waste heat boiler, from the source of heat recovered, we can usually divide it into waste flue gas waste heat boiler, waste water/waste liquid waste heat boiler, waste heat boiler (waste heat boiler). At present, the industry calls waste heat boiler, so when we use waste heat boiler, tube explosion will occur. What are the factors causing this phenomenon? Today, Xinxiang flue gas waste heat boiler manufacturer Let's have a look!

1. The quality of manufacturing, installation and maintenance is poor. If the pipe quality is poor or the pipe steel grade is wrong; The quality of pipe welded junction is unqualified; The wall thickness at the elbow is seriously thinned; Foreign matters in the pipe reduce or block the channel area; During maintenance, the pipes with creep expansion exceeding the limit were not inspected, and the thin pipes were not found.

2. The load change rate is too large, which causes sudden change of steam pressure, abnormal water circulation (slow down, stagnation), overheating of pipes or fatigue damage caused by alternating stress.

3. Conversion catalyst dust adhesion and blockage cause uneven cooling and heating of economizer heating pipe, which is one of the reasons for tube explosion of economizer; The manufacturer of Xinxiang flue gas waste heat boiler said that the pipe wall was corroded or salt accumulated in the pipe. When the oxygen content of feed water is high or the water speed is too low, it often causes pitting corrosion on the inner wall of the economizer and tube explosion; The boiler water quality is unqualified, and saturated steam carries water, which causes salt accumulation in the superheater tube, leading to overheating of the tube wall and tube explosion; High temperature corrosion is one of the reasons for tube explosion of superheater and heat absorber (also called water wall).

4. Improper operating procedures for starting and stopping the furnace lead to uneven heating or cooling of pipes, resulting in large thermal stress.

5. Excessive load change rate causes sudden change of steam pressure, abnormal water circulation (slow down, stagnation), overheating of pipes or fatigue failure due to alternating stress.

The above five factors are summarized for us. If we have any demand in this regard, please call Xinxiang flue gas waste heat boiler manufacturer ！