What are the specifications for heat transfer oil in asphalt heat exchangers?
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Recently, the factory wants to install an asphalt heat exchanger; I’m not sure what specifications the heat transfer oil should meet
The heat transfer oil system is quite simple; just find a professional manufacturer, explain your requirements and technical specifications to them, and you don’t need to worry about anything else.
Direct heat exchange is sufficient; using heat transfer oil adds an extra system.
What is the purpose of going to the asphalt heat exchanger? Is it to cool the asphalt, or to heat it using heat transfer oil? If there is a temperature drop, as the friend above mentioned, direct heat exchange with other materials will suffice, allowing for optimal utilization of energy. If choosing a heat transfer oil, it is better to opt for a synthetic oil. If installing a heat transfer oil system, it is still necessary to seek guidance from an expert, as the designs provided by heat transfer oil manufacturers have their flaws, as they lack practical operational experience. We have a heat transfer oil system that we designed ourselves, and the manufacturer was incredibly impressed after seeing it, saying it’s much more efficient than theirs.
Appearance: Clear, light yellow, homogeneous liquid without layers. Component: Synthetic hydrocarbon mixture. Moisture: 250ppm. Flash point (GB/T3536): 191 ℃. Ignition point (GB/T3536): 216 ℃. Spontaneous ignition point (SH/T0642): 356℃. Kinematic viscosity (40°C) (GB/T265): 37.8 mm2/s (cSt). Kinematic viscosity (100°C): 3.22 mm2/s (cSt). Density (20°C) (GB/T1884): 876.4 Kg/m3. Coefficient of thermal expansion (200°C): 0.000971/°C. Average molecular weight: 277. Range, 10%: 330°C. Boiling range, 90%: 450°C. Thermal conductivity at 100°C: 0.1289 kcal/m.hr.°C. Thermal conductivity at 200°C: 0.121 kcal/m.hr.°C. Thermal conductivity at 290°C: 0.115 kcal/m.hr.°C.
To cool the asphalt and heat the oil depot – I’m not sure what type of heat exchange the person on the 3rd floor is referring to
For two-stage heat exchange, just as with single-stage heat exchange, it is necessary to calculate the heat exchange area properly; do not raise the temperature of the first stage too much
It is best to perform heat exchange for asphalt in two stages; if heat exchange is done in only one stage, the raw tar may be heated to too high a temperature, resulting in excessively high pressure in the primary evaporator. If you need to cool asphalt, using an asphalt vaporization and condensation cooler is a more convenient option
It is best to perform heat exchange for asphalt in two stages; if heat exchange is done in only one stage, the raw tar may be heated to too high a temperature, resulting in excessively high pressure in the primary evaporator. If you need to cool asphalt, using an asphalt vaporization and condensation cooler is a more convenient option
It is also possible to carry out heat exchange; after that, there is no longer any convective short-term heating in the tubular furnace, and the heat generated through this convective process is then transferred to the second stage. This is a very energy-efficient approach – give it a try
After heat exchange with anthracene oil, the temperature can basically reach 120–130°C, so there is no need for further heat exchange with asphalt.
After heat exchange, the temperature reaches 120–130 degrees. I’m not sure whether you will continue to use a tubular furnace for heating; if not, can this temperature be sufficient to remove light oil and water from the mixture? Our requirement is that water and light oil must be removed in Stage 1, so a higher temperature at the bottom of Stage 1 is needed, and even reflux control may be necessary to maintain this temperature. For reference only
A sample that has been heated to 120–130°C is no longer fed into the tubular furnace; as long as the moisture content in the tar is below 4%, the moisture content in an anhydrous tar is below 0.5%. During design, as a precaution, a portion of the tar is first passed through a preheater. If the water cannot be purified, steam is used to heat a section of it to above 100°C before heat exchange.
The heat transfer oil heater you mentioned must use heat transfer oil as the heat medium, with the heat from the asphalt being transferred to the cold medium (the medium that needs to be heated). Generally, the temperature of the asphalt exiting the device is around 350–380 degrees, so heat transfer oil with a working temperature of 350 degrees can be used； However, if the asphalt temperature is higher than the operating temperature of the heat transfer oil, emergency measures for special situations should be considered.
For applications such as asphalt and two-stage heat exchange, what type of heat exchanger should be used? Is a heat exchanger designed for anthracene oil and one-stage heat exchange sufficient?
A floating head shell-and-tube type will do. The yield of anthracene oil is 30–35% of that of anhydrous tar; the temperature drops from 270°C to 130°C. If phase changes are not taken into account, the temperature can be increased by about 40°C. If the temperature of the production tank is 90°C, the temperature in Stage 1 can theoretically reach 130°C. In fact, excluding factors such as heat dissipation, phase change, and the higher specific heat of water compared to oil, temperatures of 120–125°C can be achieved.
Thank you to the friend above; so, the anthracene oil flows through the shell side, right? What kind of structure is used for asphalt?
Yes, anthracene oil flows through the shell side. Asphalt heat exchangers are quite difficult to deal with. The pressure difference across the two channels using spiral plates is too large, and the volume of the tube bundles is too great. We are now adding a middle channel, using spiral plates
Don’t just say thanks upstairs; give some points. Is this Sinolix?