Shandong Huaning Electric Heating Technology Co., Ltd.
What raw material pipelines at refineries need electric heating
In cold regions, more attention is paid to heat conservation of pipelines of oil refineries and processing plants, but often they do not pay due attention to the need to increase heat conservation.
Mar 13,2023
In cold regions, more attention is paid to heat conservation of pipelines of oil refineries and processing plants, but often do not pay due attention to the need to increase heat conservation.
The main purpose of the electric heating of the pipeline is to compensate for the heat loss of the environment during transportation, to maintain the necessary temperature, to prevent freezing and freezing of the pipeline. In cold regions, to add heating pipes, it is necessary to remove the finished layer of insulation, which not only leads to the waste of labor and material resources, but also affects the construction time. Sometimes, due to the limitation of the pipe trestle and the distance between the pipes, it is difficult for the project to be repaired to meet the design requirements and expected results. After some devices have been put into production for a long time, various low-speed heating pipes are still added to keep the device running.
The above situation is more noticeable in the catalytic cracking unit, because there are many types of piping in this plant, and their number is large. In the production process, the catalytic cracking unit has several production plans, and the operation is flexible. And interchangeable. Pipelines are sometimes in different working conditions. In addition, the temperature varies from place to place, and the temperature varies from season to season, which complicates the construction of heating the pipeline. In addition, fundamental norms and instructions have been made in the current design technical conditions for the electric heating of pipelines. Therefore, when designing, work must be combined with the real situation in order to make a judgment.
The raw material for a catalytic cracking unit is usually a variety of paraffin oils, heavy oils, or mixed oils. Its freezing point is relatively high, and it does not flow at room temperature. The temperature of these oils is above 90 °C. As it is fed, the flow rate is constantly changing, and sometimes the transport may be interrupted, but is not suitable for immediately purging., the IAO pipeline must be added by a heating line. After the raw material is heated, the temperature becomes relatively high, and the pipeline entering the reaction riser cannot be equipped with a heating line. But his crash is returning to the west line because the flow rate is changing so much so a heat line needs to be added. Other feedstock system pipelines in the Alpine region, such as the start-stop cycle line, the heating line, and various auxiliary lines used in abnormal conditions, require heating lines.
Many existing installations, especially heavy oil catalytic cracking units, although equipped with furnaces to heat the feedstock, are shut down in normal production, and only open at start-up or abnormal temperature increases, so heating furnace inlet and outlet pipes to cold regions A heating pipeline is also required.
Related Posts
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.
Need help to find the right solution with our experts?
WhatApp:
E-mail:
Address:
Xinxing Street, Industrial Park, Shanghe County, Jinan City, Shandong Province
✪ Huaning Electric Heat Tracing provides you with professional solutions
