Questions regarding heat transfer oil cooling equipment
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Hello everyone: The temperature of the heat transfer oil in our factory is 270–300°C, and the temperature of the heat transfer oil used in the other workshops is just right. However, the distillation systems produced in our workshop require heat transfer oil at lower temperatures, ranging from 180 to 240°C. Preliminary idea: Use a heat exchanger to exchange heat between the high-temperature and low-temperature heat transfer oils, with the temperature of the low-temperature heat transfer oil being controlled at 180–240°C for use in production equipment. Is there such a heat exchanger? ? Does a low-temperature heat transfer oil system need to be independent, with equipment such as circulation pumps and surge tanks, …? Or are there other better forms of cooling or heat exchange devices? ? It would be best to be able to control the temperature of the heat transfer oil automatically... But methods such as using cooling water to cool the high-temperature heat transfer oil before reuse result in significant heat loss, and the disposal of high-temperature water is also a problem, so such approaches are not considered. I would be grateful if you could offer your guidance and provide relevant information. Thank you! ! !
Isn’t heat transfer just about considering the relationship between heat transfer temperature and heat transfer flow rate? Personally, I recommend avoiding the need to install a high/low temperature heat transfer oil system; instead, it is sufficient to upgrade the material used in the heat exchange equipment to one that can handle temperatures of 180–240°C, and achieve heat transfer by reducing the flow rate of heat transfer fluid
Here are some suggestions: 1. Install a low-temperature heat transfer oil system without a heating system; use heat exchange between the high-temperature heat transfer oil and the low-temperature one as a heat source for the latter. You will need to calculate the area of the heat exchanger to ensure effective heat transfer, thereby avoiding the need for additional cooling facilities. The low-temperature and high-temperature systems should be separate circulation systems. During the phase of raising the temperature of the heat transfer oil, both systems can make use of the high-temperature heating system; once the low-temperature system reaches an appropriate temperature, it operates independently from the high-temperature system for heat exchange. Other specific cooling methods can be discussed based on your process requirements.
High- and low-temperature heat transfer oils are mixed directly, and the temperature of the mixed oil is controlled by regulating the flow rate of the high-temperature heat transfer oil.
Thank you to sdwfsgyykai, zhaisanming1, and 68ZCW for their responses. I also had the idea of mixing high- and low-temperature heat transfer oils to create a low-temperature heat transfer oil for use. But I’m not sure whether this can be achieved in practice, that is, whether it’s possible to reach the temperature required for production using just a mixing tank… I’ve drawn a rough diagram; I would appreciate your feedback.
There’s no need for such complexity; it’s sufficient to install an electric three-way valve in front of the equipment. By controlling the flow rate of the heat transfer oil, its temperature can be regulated. If the equipment is extremely sensitive to temperature, a heat exchanger can be used to pre-cool the oil.
I wonder what the return oil temperature of the heat transfer oil is in other workshops? If appropriate, the heat transfer oil can be used to heat other workshops first before being used in our workshop.
Agreed, this way it doesn’t need to be that complicated
Thank you for your reply………… Huohuli, Handan Boilers… Using the return oil from other workshops is a good idea, but it’s very difficult to put into practice, as the production processes in those other workshops aren’t synchronized with ours, and the flow rate of the heat transfer oil also differs…………………… Xu Weiwei… Controlling the temperature by regulating the flow rate of the incoming oil might work overall for the heating equipment, but the temperature at the inlet of the equipment could exceed the required levels by a lot, and the equipment might not be able to handle that. I’m sorry for not explaining in detail earlier; our equipment are enamel-lined reactors with jackets. Most of the time, the temperature of the heat transfer oil used is below 200°C, though it can reach 230–240°C for short periods. Thank you all again for your support! ! ! :)
What is your data usage? If it’s high, heat recovery can be used to address this
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