Deficiency and harm of heat transfer oil boiler

The heat transfer oil in the heat transfer oil boiler is easy to be oxidized during the heating process, and the acid value of the oil increases and the change rate is large under high temperature. Its kinematic viscosity gradually increases, which is due to the thermal cracking and thermal condensation reaction of heat transfer oil components at high temperature. The thermal cracking reaction results in the formation of small molecular compounds, which reduces their viscosity; The thermal polycondensation reaction generates polymer products, which increases its viscosity. Small molecular compounds will have a small amount of volatilization, and the overall result will increase the viscosity of the oil, and the amount of carbon residue will increase with the increase of temperature. When the service temperature is between 300 and 400 ℃, thermal cracking is easy to occur, and carbon deposit is formed on the inner wall of the pipeline and equipment, which affects the heat transfer efficiency, accelerates the aging and failure of the conduction oil, and also makes the furnace body and pipeline overheat locally, damages the mechanical strength and endangers personal safety.
Heat transfer oil boiler
The scaling of the heat transfer oil in the heat transfer oil boiler in the pipeline reduces the flow area of the oil transfer pipeline to varying degrees, increases the friction resistance, increases the transmission energy consumption, reduces the oil transfer capacity of the pipeline, and sometimes even leads to accidents such as initial condensation and flow stoppage. In addition, the oil scale and coke scale produced by heat transfer oil can increase the thermal resistance of the pipe wall, increase the energy consumption in the production process, shorten the service life of the equipment, reduce the internal diameter of the equipment, increase the pressure drop of the material flow, reduce the yield, shorten the operation cycle, and seriously affect the production.
A small amount of light components in the heat transfer oil boiler can be discharged through the exhaust line. However, if there are too many light components, the pump flow will be low and the boiler will be shut down. Too many heavy components will cause coking inside the furnace tube and reduce the heat transfer rate of the furnace tube. The thermal efficiency of the hot oil furnace is reduced, resulting in energy waste, and the temperature difference between the inside and outside of the furnace tube is increased. When the temperature of the outer wall of the furnace tube reaches 600~700 ℃, it is easy to burn through the furnace tube, resulting in fire accidents, equipment damage, and even casualties. Coking is the enemy of hot oil stove and the root of fire. It is a problem worth studying to avoid coking in hot oil stove