Shandong Huaning Electric Heating Technology Co., Ltd.
Pipeline heating method in chemical production
Heatsinks for chemical equipment and pipelines include hot water, steam, coolant and electric heating. The most commonly used steam and electric heaters.
Mar 06,2023
Related heat is different from heating The accompanying heat is used to maintain the temperature of the medium by using the heat lost by the heating device during the process, while the heating is strongly concentrated at a single point or in a small area to raise the temperature. Heated body The required heat is usually significantly higher than that of electric heating, so electric heating is one of the important energy saving measures for equipment and pipelines of chemical enterprises. The electric heating pipeline is safe and reliable, easy to build, can effectively control the temperature, prevent the pipeline environment from overheating, and has low operation and maintenance costs, but the one-time investment is large.
Heatsinks for chemical equipment and pipelines include hot water, steam, heat transfer and electric heating. The most commonly used steam and electric heaters.
Since the side steam or exhaust steam can be used in chemical engineering, it can reduce the cost of electric heating, and the hidden heat of steam is large, and the application area is wide Chemical equipment and pipelines with operating temperature below 150 °C can be used, so chemical heating of pipelines The first medium used was steam.
The early electric heating products were all constant power products that had certain disadvantages, For example, the power remained constant after the power was turned on, and the heating temperature could not be controlled, or high temperature hot spots were easily generated in places. With poor heat dissipation and overlapping intersections, and temperature control had to be added once a temperature control device or unit.
In addition to constant power electric heating cables, the frequency of use of self-regulating electric heating cables is also relatively high. The self-regulating tubular electric heating belt is made of conductive polymer composite material and has the following characteristics: \ n1. The heating temperature can be automatically limited \ n2. It can automatically adjust its power output according to the actual needs of the heated system. 3. The above functions can be performed independently and in sections. For example, for the same pipeline, if the temperature in a certain part of the outside air is relatively low, then the self-regulating electric heating belt will automatically increase the output power in this area, and if the other part is indoors, the room temperature is relatively high, And self-regulating electric heating belt automatically reduces power output. 4. The electric heating cable can also be arbitrarily cut or lengthened within a certain range, and there can be any overlap without high temperature hot spots.
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Electric heating cable is a heating method that uses insulation resistance or resistance heating wire to create a temperature after power supply. It can automatically adjust the output temperature and reasonably maintain the process temperature requirements to keep warm, raise the temperature and protect the heating equipment from freezing. The insulation and antifreeze effect of the container is very good.
Which electric heating should be chosen for the main pipeline transport of heavy oil
Transport of heavy oil through the pipeline over long distances and long-term retention in the pipeline will result in a drop in temperature due to heat dissipation and increased viscosity, which will cause the pipeline to be blocked by freezing or condensation-related accidents. Electric heating is widely used as effective insulation of pipelines and anti-freeze protection.
Which electric heating cable should be considered for a 4 km pipeline
According to the statistics of the Hydrometeorological Center, the average daily minimum temperature at the location of the CNPC tank farm is 5 ° C, and the average daily maximum temperature is 14 ° C. Since the freezing point of the PX is about 15 °C, the supply pipeline needs heat preservation and heating. The oil depot has been in operation for many years without a stable source of steam, therefore, this project is considering the use of electric heating technology.
Application of outdoor electric heating cable in oil main pipelines with high paraffin content
Long-distance crude oil pipelines with a high paraffin content with freezing temperatures above 50 °C. According to the requirements of the production plan of the plant, the volume of oil transportation through the pipeline is 150 thousand rubles. Tons per year, maximum-200 thousand. Tons per year.. According to the thermodynamic analysis of the pipeline, the initial supply temperature of the pipeline is 80 ° C (TN), and the temperature of the end entering the tank is 60 ° C (Tu). Since the transportation temperature needs to be adjusted according to the time of year, it sometimes needs to be transported by heat.
What heating product to choose for main infusion pipelines
In petrochemical engineering, trunk infusion pipelines are the lifeblood of the factories. The temperature in the northern region is too low in winter and the pipeline needs to be insulated to compensate for the heat loss due to the low temperature in winter to ensure the normal operation of the pipeline.
The role of leather tracer cables in the insulation of asphalt main pipelines
The toughness of the asphalt is greatly affected by the temperature. When the temperature decreases, the toughness of the asphalt increases, and the drop in resistance of the asphalt during pipeline transportation increases; when the temperature falls below the freezing point, the asphalt solidifies, causing the pipeline to clog and the conveyor belt to come to trouble. Therefore, electric heating and heat preservation during the transportation of asphalt are very important.
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