Shandong Huaning Electric Heating Technology Co., Ltd.
What electric heating cable is used for port oil pipeline?
At present, electric heating technology has gradually replaced water and steam heating, and is widely used for thermal insulation and heating of petrochemical pipelines. The electric heating is to use the heat generated by the electric heating products to compensate for the heat loss by the heating pipes and other process devices so that the appropriate temperature of the medium can be maintained within reasonable limits to meet the process requirements.
Aug 25,2022
The port is one of the important links in the storage and transportation of petroleum products and liquid chemical raw materials. The storage process mainly depends on the dock, and various petroleum products and liquid chemical raw materials are loaded, discharged, stored, transported and piped. Due to the long distance between the port terminal and the rear storage tank, the pipeline is the artery connecting the vessel to the shore. According to the characteristics of crude oil, most oil pipelines in northern ports need to be heated. Thermal insulation and heating to prevent clogging of the pipeline.
In the early days, oil pipelines mainly used hot water and steam for thermal insulation, however, due to low thermal efficiency, "leak, drip and leak" phenomena occurred, and there were disadvantages such as heavy maintenance load, energy waste, and environmental damage. At present, electric heating technology has gradually replaced water and steam heating, and is widely used for thermal insulation and heating of petrochemical pipelines. The electric heating is to use the heat generated by the electric heating products to compensate for the heat loss by the heating pipes and other process devices so that the appropriate temperature of the medium can be maintained within reasonable limits to meet the process requirements. The electric heating can directly convert electrical energy into thermal energy and has a simple design, convenient installation and maintenance, etc. D.
The electric heating cable is installed between the insulation layer and the outer wall of the pipeline, and uses electric heating to compensate for the heat loss during the storage process, so that the main pipeline can be maintained within a certain range to achieve the purpose of electric heating. Heating, heat preservation and antifreeze. According to the control method of the electric heating cable, it can be divided into the following two categories:
Constant power electric heating belt. It consists of metal wires connected in series or in parallel and then combined with a conductive core and insulating material. Because of its constant power output, temperature storage should be controlled by power on and off.
Constant power parallel electric heater
A series of constant power parallel electric heating tapes has a constant calorific value per unit length. The longer the electric heating belt is used, the larger the total output power, and the maximum use length of the single circuit is larger; it is mainly used for various high-temperature pipelines, Appliances and tanks Physical equipment insulation, maintenance and heating temperature higher.
Electric Heating Tape Series
HCL Series Electric Heating Tape is a type of electric heating with a wire core as a heating element. Since the resistance per unit length of the wire core and the passing current are constant, the entire heating tape is heated evenly from end to end., and the output power is constant. Its biggest feature is its long length of use, which is mainly suitable for heating and heat preservation of single pipelines of long and ultra-long length. The maximum length of the power point is from several hundred meters to several thousand meters.
Self-regulating heating tape. It consists of a conductive polymer, two parallel metal wires and an insulating layer. The polymer wire has a high positive temperature coefficient of resistance and is connected in parallel with each other. It can automatically adjust the output power and automatically limit the heating temperature by changing the temperature of the heated body.
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Electrical heating installation precautions
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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