How to judge the carbonization and coking of heat transfer oil

There are several issues that should be paid attention to in the heat-conducting oil boiler diesel burner: 1. Pressure gauge: If the pointer fluctuates, check whether there are any problems in the system Drain or gas, and perform dehydration and exhaust; if the oil leaks, there is a gas leak in the meter, replace the new meter; 2. High temperature oil pump: If vibration or abnormal sound occurs, cavitation may occur. Remove impurities in the oil filter; 3. Expansion tank: When abnormal sound or vibration occurs, check whether the pipeline is blocked; 4. Level gauge: If the liquid level is too low, add new oil in time; 5. Pipeline valve: switch position Whether it is correct and whether it is leaking oil. 6. Filter: The filter is set to prevent large particles in the pipeline from entering the high temperature oil pump. Please pay attention to check the filter and clean it regularly during installation, which can greatly increase the service life of heat transfer oil and equipment. The oil temperature of the heat transfer oil expansion tank must not exceed 70°C. If the oil temperature is too high, the system performance is poor or the pipe connection is poor, it is harmful to the service life of the heat transfer oil, and failure should occur as soon as possible. When will the system produce a large amount of sludge, coking and accumulation Carbon can be cleaned online in time, and online cleaning will not affect the normal operation of the equipment. Safety countermeasures (1) Ensure the safety of equipment The heat transfer oil heating system should be managed as a pressure equipment to ensure that the heating equipment is intact and leak-free, otherwise the consequences will be very serious. During use, the wall thickness and compressive strength of the equipment should be measured regularly, and pressure gauges, safety valves and blow-out pipes should be installed on the equipment and pipelines. (2) Strict and safe operation When using the thermal oil boiler diesel burner, the temperature should not exceed 350°C to prevent the temperature from rising above the pressure and causing danger. In order to avoid overheating of the pipe wall on the heating surface of the heat transfer oil, the flow of the heat transfer oil should be turbulent, that is, Reynolds number Rc> 10000, and have a certain speed, so as to reduce the thickness of the boundary layer when flowing over the heating surface. During the heating operation, the circulating pump with the heated body is not allowed to stop. When the thermal load is reduced or temporarily stopped, the bypass return valve should be opened to adjust the flow of the system so that the heat transfer oil in the pipe has sufficient flow and velocity. The heating furnace starts at the beginning of air preheating of the heating surface pipes and system pipes. When the ignition starts to heat up, the heat transfer oil has low temperature, high viscosity, slow speed, and thick film layer. The heating speed must be strictly controlled, generally below 40-50℃/h, in order to avoid local heat overheating. When the temperature of the circulating heat transfer oil is high but the temperature of the thermal equipment cannot be increased, the outlet temperature of the heat transfer oil should not be increased blindly, and thermal equipment, such as a scale, should be used. When using heat transfer oil, pay attention to the temperature and pressure at the beginning of the startup The relationship between. If the pressure is too high and the temperature is too low, it means that there is water and should be exhausted in time; if the pressure is low and the temperature is high, it means that the heat transfer oil is insufficient. When the system stops running, the heat transfer oil circulating pump should continue to run for a period of time. After the heat carrier is cooled, all the heat transfer oil in the system should be returned to the storage tank, especially if there is no residual heat on the heating surface. (3) Ensure the heat conduction of oil and water. It is forbidden to mix heat transfer oil with water or other low-boiling impurities and flammable and explosive substances. When starting the car, the water in the system should be drained first, and then the intake valve and check valve should be opened, and heated as required to remove the water in the heat carrier; the newly added or added heat transfer oil must be preheated and dehydrated before being added. When eliminating water, first open the air valve, and then use a small flame to increase the temperature of the heat transfer oil to 150°C at a rate of 5°C/h to allow the water to evaporate and escape. Then lower the exhaust valve and raise the temperature to 250°C at a rate of 10°C/h. During the heating process, if there is water knocking sound or high pressure, immediately open the exhaust valve to discharge water vapor, and then close the exhaust valve to start. When stopping the furnace, close the steam valve of the light oil burner of the heat-conducting oil furnace after releasing the heated material to avoid material leakage into the system. (4) Removal of coking and scaling. In production practice, it is safe for the coking thickness to be less than 2mm, and the coking layer in the furnace tube is between 0 and 1.5mm. At this time, the continuous accumulation of the coking layer is roughly balanced with the melting amount washed by the heat carrier. The thickness of the coke layer in the furnace tube can be measured by an ultrasonic thickness gauge. A filter should be installed at the inlet of the circulating pump to remove suspended polymers and carbon particles precipitated by local overheating caused by chemical changes. The filter should be easy to disassemble and replace in order to clean up the residue and impurities regularly to ensure the filtering effect. (5) Strengthening safety management should pay attention to formulating and implementing technical specifications and management regulations for the operation of hot oil heating equipment, and strictly abide by relevant laws, regulations and safety operating procedures. The heat conduction oil heating operation should have a complete emergency treatment plan, especially to prevent the occurrence of overflow, spraying materials, leakage, overload and disease operations. Once the leakage point, stop the leakage immediately and replace the insulating cotton. (6) Set up safety devices Set up temperature, pressure, flow, liquid level automatic adjustment system, alarm system and safety release device to ensure the sensitive use of instruments. During the heating operation, if the pressure suddenly rises, immediately open the exhaust valve to release the pressure, and close the valve of the heat carrier pipe to the heating device. ! If you are interested in diesel combustion engines, please contact us for a quote!