Shandong Huaning Electric Heating Technology Co., Ltd.
Selection of electric heating system for photothermal power plant
In order to ensure the safe and stable operation of the solar thermal power plant, liquid salt media circulation equipment such as storage tanks, piping, valves and heat exchangers should generally be equipped with electric heating devices.
Feb 18,2023
Photothermal energy production (solar thermal power generation) is a system that converts solar energy into thermal energy and generates electricity through the conversion process of thermal work. In addition to a thermal energy conversion system similar to conventional thermal energy, solar thermal energy also has a light-to-heat conversion process, which is a connected light-to-heat-work system.
Whether the heat carrier of a solar thermal power plant is water, heat transfer oil or molten salt, there is a risk of freezing to varying degrees when flowing through pipelines, instruments and other equipment. Cause additional damage to the safe operation of the system. Especially in the north-western region of my country, the operating conditions of solar thermal power plants are relatively harsh, with the lowest temperatures below minus 40C, and the risk of freezing and blocking the system is extremely high. Because molten salt has a high freezing temperature, once the temperature reaches the freezing point of the molten salt, it is very easy to cause the pipeline to freeze and block, and even lead to paralysis of the entire system. In order to ensure the safe and stable operation of the solar thermal power plant, liquid salt media circulation equipment such as storage tanks, piping, valves and heat exchangers should generally be equipped with electric heating devices.
Electric heating in the traditional area is mainly used for pipe insulation and anti-freeze protection The working temperature of the electric heating is usually around 60-200 °C. However, due to the high requirements for the operating temperature of solar thermal power plants, the electric heating temperature should be higher than 300 ° C, and in some areas even higher than 500 ° C is required, and can work stably for a long time at this temperature, therefore, higher requirements are put forward to the reliability of the electric heating system.
As a result of continuous improvement and validation of the molten salt electric heating project in the photothermal industry, it has been finalized that the product suitable for heating with molten salt is a mineral insulated alloy 825 sheathed heating cable.
This type of mineral insulated heating cable has high safety performance and long service life. It is a new product with excellent economic performance in China. It can be used not only as an electric heating element, but also as an electric heating element. Since all mineral insulated heating cables are made of heat-resistant metals and inorganic insulating materials, they have incomparable advantages over other heating cables or plastic-bonded heating belts such as high mechanical strength, long service life and high operating temperature. Resistance to solar radiation, etc.
In solar thermal power plant projects, electric heating is a key auxiliary system for heat collection and storage systems. The electric heating system uses an accurate and optimized design, which makes it possible to compensate for the thermal losses of pipelines and equipment into the environment by converting electrical energy into thermal energy, and to prevent solidification and crystallization of heat carriers such as molten salt and heat transfer oil. Piping and equipment, as well as freezing protection of the hydraulic fluid at 0 °C to ensure fluid flow in the process system. A well-designed, reliable product and more strictly installed electric heating system can not only make the heat collection and accumulation process of thermal power plants safer and more stable, but also avoid large losses caused by freezing.
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
