Industrial instruments are mostly used to monitor critical reactions or processes and emissions and to control the whole plant. To ensure reliable operation and working stability of the instrument, it may be necessary to prevent freezing and maintain process temperatures, as well as reduce the risk of burns and maintain airflow above the dew point temperature, prevent condensation and crystallization.
Electrical heat trace pipe bundles can be used as the connecting pipeline for pressure gauges, flow meters, liquid level meters, etc.
The probe at the top of the chimney extracts the flue gas, and delivers it to the analyzer for determination via the sampling tube and gas tube, as the extraction gas analyzer requires the gas sample to be kept above the dew point. If samples are transmitted for a long distance, electrical tracing must be adopted to keep the process gas flow above the dew point, and the electrical heat trace tubing bundle is the best solution.
For antifreeze protection or process temperature maintenance of the pressure conduction pipeline of the process instrument, sampling pipeline and small-diameter process pipeline in the online instrument box, the electrical heat trace tubing bundle can be applied for heat tracing.
The analyzer house is an enclosed structure for installing analyzer, and is characterized by a high degree of integration and complex internal pipelines, which can meet the special environmental conditions required for the complete system of online analyzers. For sampling pipelines that need antifreeze protection or process temperature maintenance, the electrical heat trace tubing bundle would be the best choice.
With the development of industry, many industries are inseparable from the application of steam, such as petrochemicals, food pharmaceuticals, metallurgy, electricality, etc., which require a large amount of steam. There is a need to pave a large number of pipelines for the main steam pipeline from the sub-cylinder in the boiler house to the production workshop, and the branch steam pipeline from the main steam pipeline to each production equipment.
When paving traditional steam pipelines, there are many problems such as poor heat preservation effect, serious pipeline corrosion, drain valves that are easily blocked and damaged, as well as long cycles of field installation and construction. With the development of heat tracing technology in recent years, the integrated tracing station gradually substitutes the traditional tracing station and has developed from the first-generation old integrated tracing station to the third-generation. The seamless carbon steel collection tube replaced the integrated forged collection tube; the carbon steel drain valve and gate valve replaced the integrated stainless steel drain valve block, which meets the project requirements and reduces the project cost. The prefabricated heat trace tubing bundle with 304ss process pipe is taken as the distribution tube of the tracing station, which solves the problem of pipeline corrosion and decreases the cost in the service stage. The prefabricated heat trace tubing bundle is one of the more important products among the tubing bundle series products of Jiahong.
The prefabricated heat trace tubing bundle, also known as prefabricated insulating tube bundle, and with the model of JH-Trace-P series, belongs to the simple insulating All-in-one composite tube bundle and is suitable for conveying hot and cold liquids and gases. This product mainly uses the coiled tube made of 304ss stainless steel as the core tube, and the outer side is wrapped with non-hygroscopic glass fiber wool as the insulation material layer, which plays a role in thermal insulation. The outer sheath of the heat trace tubing bundle is made of PVC. In addition, the connection ferrule and mounting fittings are configured according to the diameter of the core tube.
CEMS stands for Continuous Emissions Monitoring System, i.e., an integration system that continuously monitors the concentration and total emissions percentage of gaseous pollutants from air pollution sources, then transmits the detection value to the official department in real-time. According to the classification of sampling technology, CEMS testing can be divided into direct measurement method, dilution method, and extraction method, and the dry measurement method in the extraction method meets the requirements of our environmental protection standards.
The CEMS using the dry measurement method needs to transmit the sampling object to the sampling equipment via the sampling pipeline. However, the sampling object includes sulfur dioxide, nitrogen oxide, water steam, etc. The temperature of the transmission pipeline must be maintained at 120℃ to 160℃ level, or even 180℃, so as to prevent the cases that the water steam liquefied, and the sulfur dioxide dissolved in water which turns into sulfuric acid due to the decrease in temperature. Otherwise, the measurement results will be affected. In this way, water in the flue gas can exist in the form of steam. Meanwhile, it can also prevent water condensation. Otherwise, sulfuric acid will be formed with sulfur dioxide. Therefore, the heat trace tubing bundle becomes the optimal solution.
The commonly used heat trace tubing bundles adapted to CEMS are usually powered by 220VAC, 50Hz. The maintained temperature ranges from 120℃ to 160℃ depending on the systems with different bands and requirements. Therefore, the adapted integrated heat trace tubing bundles are mainly high-temperature self-regulating tracing cable and power constant tracing cable, with the power output of about 35W/m. The material of the sampling tube used is PTFE with an outer diameter of 6mm.
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