Anticorrosive (corrosion-resistant) heat tracing sampling tube
Information source: Anhui Cable Group Views: 5375 Release time: 2014-03-28
An anticorrosive (corrosion-resistant) heat tracing sampling tube is equipped with an electric heating cable device. The purpose is to increase the temperature of the flue gas, completely vaporize the moisture in the flue gas, and prevent gaseous pollutants such as SO2 from dissolving in the water, resulting in measurement errors. Therefore, the temperature is required to be controlled to about 150 degrees. When selecting the anticorrosive heat tracing sampling composite pipe, it is necessary to know its type. Generally, there are two types of self-limited temperature electric tracing and constant power electric tracing, which is convenient for different maintenance methods.
The self-limiting temperature and heat tracing sampling pipe needs temperature control. The heating temperature is generally high. The temperature control system must be reliable to prevent pipeline damage. During routine maintenance, check whether the heating temperature at both ends is consistent. The self-limiting temperature and heat tracing sampling tube generally does not have an open circuit or no heating phenomenon, but the contact probe must be in close contact with the heating cable when the thermometer is installed to prevent inaccurate measurement and burn the sampling pipeline;
During the routine maintenance of the constant-power electric heat-tracing sampling composite pipe , it is also necessary to monitor the temperature at both ends, and it is necessary to regularly check the heating condition in the middle of the pipeline. If the instrument parameter jump occurs, this may also be the reason.
The automatic temperature control function of the self-limiting electric heating belt can ensure that a certain constant temperature is maintained in the sampling tube, and ensure that the sample collection is basically consistent with the initial value, and finally ensure that the aforementioned three systems continuously and correctly collect sample gas. According to the actual conditions of the sample gas composition, temperature, etc., the sampling conduit can be made of different materials, the electric heating belt can be selected according to the user's selection of high, medium and low temperature products, and various wires are configured according to the function.
Constant power electric heating belt is also called parallel electric heating belt . The power bus is two parallel insulated copper wires. The heating wire is wound in the middle of the insulation layer, and the heating wire is connected to the bus bar at a certain distance (that is, the "heating section length"). Form a continuous parallel resistance. After the bus is energized, each parallel resistor generates heat, thus forming a continuous heating belt. This product can be used in non-explosive occasions and in the first and second zones of the factory.
1. Coal, oil and gas combustion;
2. Exhaust gas monitoring in power plants;
3. Waste incineration equipment;
4. Process gases in the refining, petrochemical and chemical industries;
5. Indoor air monitoring;
6. Engine exhaust gas measurement on the test bench;
7. Antifreeze in water analysis;
8. Other analysis and measurement;
Related information: Installation and use instructions of heat tracing cable (sampling composite pipe)
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