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Industrial pipeline anti-freezing heat tracing and temperature maintenance system
Natural gas pipeline antifreeze heating system
Key words:
Classification:
Natural gas pipeline freeze protection tracing system
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- Description
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- Commodity name: Natural gas pipeline antifreeze heating system
In the case of low temperature in winter, the medium in the gas is easy to cause the pipeline to freeze and block, resulting in the normal supply of gas, which seriously affects people's daily life, and there are great potential safety hazards. The gas pipeline itself does not have the ability to generate heat, and simple insulation cannot solve the above problems. In order to solve the problem of condensation and icing of wet gas, it is necessary to trace and heat the overhead gas pipeline or buried gas pipeline.
► Application scenarios
In the case of low temperature in winter, the medium in the gas is easy to cause the pipeline to freeze and block, resulting in the normal supply of gas, which seriously affects people's daily life, and there are great potential safety hazards. The gas pipeline itself does not have the ability to generate heat, and simple insulation cannot solve the above problems. In order to solve the problem of condensation and icing of wet gas, it is necessary to trace and heat the overhead gas pipeline or buried gas pipeline.
Combined with the structure and temperature characteristics of liquefied gas pipelines, a comprehensive design scheme for electric heating is provided. The special type of electric heat tracing for gas is laid in the foundation floor through the pipe, and through the pipe, the bottom area of the tank and the surrounding annular area are provided to provide uniform heat to maintain the compensated temperature according to the needs, and provide an excellent control and monitoring system to facilitate the monitoring and control of the temperature of the heating medium.
► Natural gas pipeline insulation and heat tracing system
The main components of natural gas pipeline antifreeze heating system: intelligent temperature control distribution box, heat tracing, power junction box, two-way junction box, three-way junction box, terminal junction box, temperature sensor, stainless steel cable tie, glass fiber tape, insulation layer, etc.
System Advantages:
1. Cost-effective: The electric heat tracing designed and selected by our company has a long service life, low maintenance rate and high heat transfer rate. The advantages of YATALO electric heat tracing: low starting current, low upfront power distribution cost, long service life, low maintenance cost in the later stage, low power consumption in long-term operation, and high heat conversion rate. We pay attention to the quality of each single product and the professional quality of system integration products, so as to achieve the effect of reducing costs and increasing efficiency in the real sense.
2. Safety guarantee: The main performance items of YATALO electric heating product manufacturing standards meet the GB/T19835-2015 standard, and the product materials are made of high-quality materials to ensure that the performance of the electric heat tracing meets the standards, with good thermal stability, low starting current, uniform heating temperature, heating temperature is within the standard range, will not overheat or short circuit lead to heat tracing combustion or burning, long service life, low attenuation of power meter, and high cost of replacement cycle caused by short life.
► How it works
The temperature sensor installed on the pipeline will be transmitted to the temperature control instrument through the signal cable, and the temperature control meter will compare the temperature received with the set temperature, when the current temperature is greater than the set temperature, the heat trace will not work, when the current temperature is less than the set temperature, the heat trace will start to work, in order to avoid frequent start-up, a return difference will generally be set.
► Conventional selection
According to the environment of different gas pipelines and the precise maintenance temperature and the local minimum temperature, and the different temperature control methods, there are two different types of electric heating belts, respectively:
1. The self-regulating electric heat tracing is based on the characteristics of its own PTC, it can change according to the temperature of the environment and the temperature of the medium in the pipe, and the heating power can be automatically controlled within a certain range, and the gas pipeline antifreeze generally chooses the low temperature self-control temperature electric belt of 0-65 °C curve, which is more suitable for the pipeline is not long, the number of sections is more, and there is no need for precise temperature control. It can be cut at will according to the requirements, and the installation and maintenance are more convenient. Electric heating is increasingly used in gas pipelines, and it is the hottest electric heating product in gas pipeline applications.
2. After the constant power electric belt is energized, it heats up with constant power, and does not change with the change of ambient temperature, so it must be controlled by a thermostat It is better than the thermal stability of the self-controlled temperature electric belt (the safety performance of the self-limiting electric belt is better), it can be used in the case of low and precise temperature control, it can be sheared, and it can be used with segments, the length of the pipe is not long, and the automatic temperature control electric belt is the same. However, the series constant power electric belt can be used in the long-distance pipeline for heat tracing, which can be more than 1,500 meters long, and only one power point is needed. This is suitable for large-scale electric heat tracing projects, such as the West-East Gas Pipeline.
► Construction and installation
Installation specification steps: check whether the surface of the pipeline is polished smooth and free of burrs and sharp edges, dry and free of dirt; Check whether the paint inside the pipe is dry and the gas has evaporated for more than 3 weeks; Check whether the corresponding heating tracing materials and accessories are consistent with the materials in the design table; Check whether the materials required for construction are in good condition, etc.
Construction and installation points: the installation of electric heat tracing on the pipeline generally adopts the way of straight laying or winding, during installation, every interval of 300-600mm is fixed with heat-resistant pressure-sensitive tape, after the installation is completed, along the direction of the electric heat tracing is covered with a layer of aluminum foil tape, which is used to increase the heating area of the pipeline, the power junction box and the temperature sensor are fixed on the pipeline with stainless steel tape, and the two-way junction box and the three-way junction box can be fixed with heat-resistant pressure-sensitive tape when the temperature is not high. When the temperature is higher than 200°C, it is generally fixed with stainless steel cable ties.
► Application examples
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