Reading the dehydration process of the oil heater
Only after the heat-conducting oil furnace is put into operation conditions can it be heated up and the ignition temperature-rising operation must be carried out according to the operating procedures, otherwise accidents may occur during ignition. The warming up here focuses on the dehydration of the thermal oil furnace. The dehydration and degassing of the thermal oil furnace is a more dangerous stage in operation and needs special care. Therefore, the boiler users of the majority of users must pass the training assessment of the labor department, apply for certificates, and be familiar with the professional knowledge and operation skills of the thermal oil furnace. ( Oil heaters , chillers ) In addition, you must use a qualified installation team to install, be sure to do a good job before the preparation. HTF oil heater heating temperature must follow the principle of "a slow second stop," the slow heating up a slower, second stop at 120 degrees i.e. 210 ° -150 degrees and -230 degrees two temperature stages to stop heating, Maintain this temperature for a while. Heat up the temperature, control the temperature rise temperature 10 degrees / H , until close to 100 degrees. Because the viscosity of the oil in the cold furnace is large, the flow velocity in the heating surface tube is low, the oil film on the wall is thick, and the heat transfer conditions are poor. If the heating rate is too high, the local oil film temperature is too high. The 125-150 degree range is to drive away the remaining water in the system and the trace amount of water contained in the heat carrier. The heating rate is controlled within the range of 0-5 degrees /h , depending on the dehydration conditions. When the high tank discharges a large amount of steam at the bottom, there is a water hammer sound at the bottom, the pipeline vibration is aggravated, and when the gauge's pointer swing range is large, the temperature must be stopped, the temperature is maintained, and the furnace door can be opened to weaken the combustion when necessary. . The length of this phase varies with the quality of the heat carrier depending on how much water remains in the system. Short may be more than ten hours, long may take several days, it is difficult to drain the water. Not only blindly speed up the dehydration process, because once the water in the system evaporates violently, the volume will expand by more than 1,000 times, not only may cause " boiling " , so that the oil level will expand rapidly and be ejected in large quantities, and may cause the pressure of the entire system to rise sharply. No further component evacuation (pump outlet pressure drops below 0.1mpa , with heavy gasping sound) can be performed.
