Ethanol is an important organic chemical raw material, which is widely used in medicine, food, chemical industry, military industry and other fields. In the process of producing, storing and transporting ethanol, due to the low freezing point of ethanol, it is easy to crystallize or freeze in a low temperature environment, affecting its normal use and quality. To solve this problem, ethanol can be insulated using a heat tracing.
The following will introduce the key points of heat tracing for ethanol, including the selection, installation, use and maintenance of heat tracing, so as to help users use heat tracing correctly and improve the heat preservation effect and safety of ethanol.
There are several factors to consider when choosing a heat tracing:
1.Heating power: Heating power refers to the amount of heat generated per unit of time, generally measured in W m. The higher the heat generation, the better the heat tracing, but also the more electricity is consumed. Therefore, it is necessary to determine the appropriate heating power according to the material, size, ambient temperature and other parameters of the object to be heated.
2.Maximum Maintenance Temperature: The maximum maintenance temperature refers to the maximum temperature that the heat trace can maintain under certain conditions. The higher the maximum holding temperature, the better the heat tracing effect, but it also increases the temperature change of the object to be heated. Therefore, it is necessary to determine the appropriate maximum maintenance temperature according to the material and operating temperature of the object to be heated.
3.Maximum service length: The maximum service length refers to the longest distance that the heat trace can work continuously under certain conditions. The longer the maximum length of use, the larger the heat tracing range, but it will also reduce the heating efficiency. Therefore, it is necessary to determine the appropriate maximum length of use according to the layout of the object to be heated and the power supply conditions.
4.Explosion-proof grade: Explosion-proof grade refers to the ability of the heat trace to prevent the heat under certain conditions. The higher the explosion-proof rating, the higher the safety, but it also increases the cost. Therefore, it is necessary to determine the appropriate explosion-proof level according to the use environment and explosion-proof requirements of the object to be heated.
5.Other factors: In addition to the above factors, it is also necessary to consider the material, structure, size, connection method and other factors of the heat tracing, as well as the voltage, current, power and other parameters of the power supply device to ensure that the heat trace matches the heat tracing object and the power supply device.
When installing a heat tracing, the following steps need to be followed:
1.Clean the surface of the object to be heated, remove oil, dust and other debris to ensure that the surface is dry, flat and smooth.
2.According to the design requirements, the heat trace is wound on the object to be heated, pay attention to maintain a certain spacing and tension, and avoid overlapping, crossing, twisting and other phenomena.
3.Use special tape or clips to fix the heat trace on the object to be heated, pay attention to the material and specifications of the tape or clip to match the heat trace to avoid sparks or leakage.
4.Connect both ends of the heat trace to the power supply unit, pay attention to the reliability and safety of the connection, and avoid poor contact or short circuit.
5.Cover the surface of the heat trace with a layer of insulation material, and pay attention to the thickness and density of the insulation material to be suitable for the object to be heated, so as to avoid heat loss or overheating.
When using heat tracing, the following principles need to be followed:
1.Before use, check whether the appearance and connection of the heat trace are normal, and repair or replace it in time if it is damaged, broken, loose, etc.
2.In use, protect the heat trace from mechanical damage, chemical corrosion, electromagnetic interference, etc., and if necessary, add protective measures.
3.When not in use for a long time, remove the heat trace from the object to be heated, and store it properly to avoid moisture, sun, freezing, etc.
In the process of using heat tracing, it needs to be maintained and inspected regularly to ensure its proper operation and extend its service life. The details are as follows:
1.Clean the surface and insulation materials of the heat trace, remove dust, oil, debris, etc., to avoid affecting the heating effect and insulation performance.
2.Check whether the connection of the heat trace is firm and intact, and repair or replace it in time if it is loose, broken, corroded, etc.
3.Check whether the temperature sensor of the heat trace is working properly, and adjust or replace it in time if there is a fault or error.
4.Check whether the insulation performance of the heat trace is good, and repair or replace it in time if there is leakage or short circuit.