Boiler tube burst refers to the water-cooled wall tube, convection tube and economizer tube in the heat exchange surface of the boiler during operation. Under the combined action of various reasons such as overheating, abrasion and corrosion, the pipeline burst and the high temperature boiler water leakage will occur. , Causing the boiler to fail to operate normally. Through years of theoretical accumulation and field practice, it has been discovered that the boiler pipeline burst is mainly caused reasons.
1、 poor quality of boiler feed water, no water treatment or incorrect water treatment methods, failure to perform sewage treatment in accordance with relevant regulations, causing the inner wall of the pipeline to scale or corrode. The main reason for this situation is because of some boilers. The water is taken from the ground, the hardness is as high as 5mmol/L, which is high-hardness water, and contains high sulfur and high iron. Once the water is improperly treated, it is easy to burst pipes and be forced to shut down the furnace for repairs, causing production and life. Great influence.
2、During the process of manufacturing, installation and maintenance of boiler pipelines, stress concentration and mechanical performance degradation will occur at the weld joints. Pipeline bursts will occur at key parts of these stress concentration and mechanical degradation, which will also cause boilers to appear. Failure to supply production and life needs.
3、If the water level of the boiler is too low during operation, poor water circulation will occur. After such a situation, the temperature of the local pipeline will be too high, deformed and burst.
4、Corroded pipe burst and equipment aging burst pipe. Generally occurs in the economizer tube on the heating surface of the tail, the reason is that the exhaust gas temperature is too low or the feed water temperature is too low and the acid corrosion is caused.
5、The high-temperature operation of the tube is also an important reason for the boiler tube burst. Overheating and over-temperature tube bursting is due to the mechanical performance of the tube being reduced under the condition of over-temperature, and the tube undergoes plastic deformation under pressure, that is, creep cracks and even tube bursting.
6、The influence of the operating environment can also cause the furnace tube to rupture, such as frequent start and stop of the boiler, drastic changes in load, improper adjustment of the flame center, primary and secondary air scouring the water wall tube, and rapid cooling of the furnace. Boiler tube bursts left hidden dangers.
Several measures to prevent boiler tube bursting:
In order to reduce and eliminate the occurrence of tube bursts and ensure the needs of production and life, the specific measures to prevent boiler tube bursts are as follows:
1、Strengthen the management of water treatment and water quality monitoring, increase deoxygenation and iron removal equipment, and change from primary softening to secondary softening, so that the boiler water can meet the boiler water standard and ensure the safe and economic operation of the boiler.
2、Make full use of the maintenance after the boiler is shut down, and ask a professional boiler maintenance organization to conduct a comprehensive internal and external inspection of the boiler, find and deal with the problem in time, and ensure the healthy operation of the boiler.
3、Properly increase the exhaust gas temperature to prevent the generation of condensed water.
4、Strengthen the management during operation, adjust the combustion, organize reasonable combustion conditions and proper flame center, prevent cold air from sweeping the furnace tube, perfect measures to prevent wear and corrosion, and carry out reasonable sewage discharge.
