How much do you know about the soot blowing effect of burn off oven?

Thermal cleaning furnace (also known as burn off oven, burning furnace, heat cleaning oven, carbonization furnace, paint stripping furnace, etc.), in principle, the organic matter on the surface is kept in a high temperature (generally no more than 450 ℃) and anoxic environment without damaging the metal components. Cracking, the waste gas generated by cracking is completely oxidized and incinerated in a high temperature environment above 900 °C, so as to achieve no pollution emissions.

Thermal cleaning furnaces or burn off ovens efficiently and safely wash away chemicals adhering to metal parts such as coating nozzles. Using high molecular polymer to isolate air above 300 degrees, it can be cracked and decomposed, and if it is above 400 degrees, it can be completely oxidized with a small amount of air. First, heat the workpiece with polymer dirt to 400 degrees (according to process requirements) , so that a large number of high molecular polymers on the workpiece are melted and flowed into the collection container at the lower part of the furnace, and then the furnace temperature is raised to 400 degrees, and a small amount of fresh air is introduced to fully oxidize the remaining polymer. Carbon dioxide, after being sprayed with water, is pumped through the water ring and discharged out of the furnace together with the water.

Soot blowing effect of thermal cleaning furnace/burn off oven:

1. The role of soot blowing: the long-term operation of the thermal cleaning furnace will cause ash accumulation and coking on the heating surface, resulting in the deterioration of heat transfer. For the tail flue, due to the long-term accumulation of combustibles, there will also be dangerous events of reburning. Therefore, after the thermal cleaning furnace runs for a period of time, it is necessary to carry out soot blowing work on the heating surface to clean the heating surface and avoid the occurrence of combustion events.

2. The soot blowing in the furnace adopts a short soot blowing gun, which is used for soot blowing on the heating surface of the water wall; the flue soot blowing adopts a long soot blowing gun, which is used for soot blowing on the heating surface of the superheater and reheater.

3. The influence of soot blowing on the operation of the thermal cleaning furnace: soot blowing in the thermal cleaning furnace will cause fluctuations in the negative pressure, steam temperature, steam pressure, load and water level of the thermal cleaning furnace, and soot blowing on different heating surfaces will affect the thermal cleaning furnace. The effects are also different, and these parameters should be observed more closely during the soot blowing process.

4. During the soot blowing operation of the thermal cleaning furnace, it is necessary to strengthen the inspection of the soot blower. If a soot blower is found to be faulty, it needs to be registered in time and contacted for maintenance; Immediately stop soot blowing and contact maintenance personnel in time for processing.