Electric heating system for melting snow on the roof of the terminal
In cold weather, melted ice and snow tend to form an ice cassia on the edge of the roof and elsewhere. If the ice cassia falls, it is very easy to cause accidents. The snow melting heating cable can be used on the roof of any design and special gutters for melting ice and snow. The roof electric heating system is an electric heating tape that runs along the roof trough. In icy and snowy weather, the system automatically opens to prevent the gutter from blocking, thereby eliminating potential safety threats caused by disorderly flow or prolonged retention. Ice and melt water snow.
Roof Snow Melting Electric Heating System
The gutters and downspouts use a self-regulating electric-heated ice and snow melting system, which is used to prevent water from freezing from ice and snow melting in winter and affects the normal operation of the drainage system.
The snow melting electric roof heating system mainly consists of an electric heating control unit, a heating cable, and an accessory laying and control system.
The heating cable uses self-controlled electric heating. The self-monitoring electric heating cable is a heating cable whose heating power varies according to the change in ambient temperature. The higher the temperature, the heating power automatically decreases. The tape can be cut freely.
It uses a special electric heating belt with self-control of ice and snow temperature, and the heating power of ice and snow is 30 W/m (220 V).
Connecting accessories for connecting heating cables must use the manufacturer's original special accessories (the degree of protection IP is greater than or equal to IP65) to ensure safe use The heating cable must have special protective accessories when turning or entering the drainpipe to prevent the heating cable. From damage.. The outer sheath of the self-regulating heating cable should be made of blue or black modified polyolefin, which can provide high UV resistance to the heating cable.
Each distribution cabinet is equipped with a set of ice and snow controllers for automatic control of system start-up. Each ice and snow controller has temperature and humidity sensors to determine the conditions that require system start according to the appropriate position on the control panel. The roof. The control system ensures that the heating cable is automatically turned on and the heat is monitored in ice and snow weather, and when ice and snow weather disappears, the power is automatically turned off to stop heating.
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.
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.
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.
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.
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 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.
To solve many problems in the "three high levels" crude oil extraction process, the thermal energy generated by the electric heating is used to heat the crude oil in the oil pipe throughout the process to improve the fluidity of the crude oil. Effectively solve various technical problems encountered in the operation of high-condensation, high-viscosity and high-paraffin crude oil, and achieve the goal of improving the productivity and efficiency of oil wells.