Specific applications of heat transfer oil in the chemical industry – Seeking experts
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Specific applications of heat transfer oil in the chemical industry; seeking experts
For distillation heating above 150 degrees Celsius
I was wondering if it’s generally only used for heaters?
Equipment that requires heat exchange, or as a secondary heat exchange medium
Okay, thank you. But considering that heat transfer oil requires a heating furnace as well, what is the energy consumption like?
Devices that operate in continuous production are relatively more energy-efficient compared to those heated by steam. Some reboilers are prone to decomposition due to the high temperature of the heating medium, so steam is used as a precaution.
Heat transfer oil is generally used for system heating, and a corresponding heating furnace is sufficient. If necessary, and depending on the reaction conditions and process characteristics, a corresponding heat transfer oil vaporization furnace can be installed, to which soft water is fed. The vaporization of soft water is an endothermic process, which allows for the cooling of the heat transfer oil, thereby helping to cool down the entire system. Moreover, the vapor that is generated can be recovered and reused.
Our factory uses heating furnaces for heating, which is employed in heat exchangers for heat exchange to meet process requirements; the energy consumption is fairly high.
Heat transfer oil pump: First, after the heat transfer oil pump and the pipes are installed, whether using hydraulic pressure or pneumatic pressure, the inlet and outlet valves of the pump must be closed before pressure testing can be carried out, in order to prevent damage to the seals and resulting oil leaks.
1. Preparation before starting up
(1) Clean the area, loosen the screws on the bearing housings, and add heat transfer oil as a lubricant.
(2) Manually rotate the coupling – the pump should turn smoothly.
(3) Before starting up, fill the pump with the heat transfer oil that will be used for transportation, in order to remove any air from within the pump. At this time, the gate valve on the outlet pipe should be closed.
(4) The heat transfer oil should be heated evenly before starting up. Preheating is achieved by allowing the oil to flow continuously through the pump. The standard for preheating is that the temperature of the pump casing should not be lower than 40°C below the temperature of the oil at the inlet. The preheating rate should be 50°C per hour. During preheating, the side nuts on the pump feet should be loosened by 0.3–0.5 millimeters; they should then be tightened once preheating is complete.
2. Starting up the pump
(1) Ensure that all preparatory tasks have been completed properly.
(2) Connect the power supply. Once the pump reaches its normal operating speed and the instruments show an appropriate pressure, gradually open the gate valve on the output pipeline and adjust it to the desired operating conditions. The pump should not operate continuously for more than 3 minutes with the gate valve closed.
(3) During the first 3–4 hours of operation, after the equipment has reached the operating temperature, shut down the pump. Check the coaxiality between the pump shaft and the motor coupling. The deviation between these axes should be within acceptable limits. The pump shaft should rotate smoothly and without vibration when turned by hand. If these requirements are not met, adjustments need to be made.
(4) During startup, keep an eye on the motor’s power readings and vibration levels. The vibration level should not exceed 0.6 millimeters. If there are any abnormalities, stop the pump and check it.
1. Preparation before starting up
(1) Clean the area, loosen the screws on the bearing housings, and add heat transfer oil as a lubricant.
(2) Manually rotate the coupling – the pump should turn smoothly.
(3) Before starting up, fill the pump with the heat transfer oil that will be used for transportation, in order to remove any air from within the pump. At this time, the gate valve on the outlet pipe should be closed.
(4) The heat transfer oil should be heated evenly before starting up. Preheating is achieved by allowing the oil to flow continuously through the pump. The standard for preheating is that the temperature of the pump casing should not be lower than 40°C below the temperature of the oil at the inlet. The preheating rate should be 50°C per hour. During preheating, the side nuts on the pump feet should be loosened by 0.3–0.5 millimeters; they should then be tightened once preheating is complete.
2. Starting up the pump
(1) Ensure that all preparatory tasks have been completed properly.
(2) Connect the power supply. Once the pump reaches its normal operating speed and the instruments show an appropriate pressure, gradually open the gate valve on the output pipeline and adjust it to the desired operating conditions. The pump should not operate continuously for more than 3 minutes with the gate valve closed.
(3) During the first 3–4 hours of operation, after the equipment has reached the operating temperature, shut down the pump. Check the coaxiality between the pump shaft and the motor coupling. The deviation between these axes should be within acceptable limits. The pump shaft should rotate smoothly and without vibration when turned by hand. If these requirements are not met, adjustments need to be made.
(4) During startup, keep an eye on the motor’s power readings and vibration levels. The vibration level should not exceed 0.6 millimeters. If there are any abnormalities, stop the pump and check it.