The coal powder silo process analysis system extracts gas from the silo through sampling probes installed inside the silo. This is the first step in obtaining the sample to be tested, ensuring that subsequent analysis is based on the actual warehouse environment. After being sent to the gas path pretreatment unit through the heat tracing and transportation unit, the sample gas will be processed, such as filtering, to meet the acceptable standards of the analyzer. Generally, it is required that the dust content be less than 1um and the dew point be less than 5 degrees Celsius to ensure that the gas entering the analyzer is pure and meets the requirements of the instrument, and to avoid impurities interfering with the measurement results.

The analyzer uses multiple principles to detect gas composition and concentration. Commonly used are electrochemical sensors, which determine gas concentration by detecting the current generated by the reaction between gas and sensor electrodes; There are also infrared sensors that measure concentration based on the absorption characteristics of gases towards specific wavelengths of infrared light. These sensors can monitor the concentration of gases such as oxygen, carbon dioxide, carbon monoxide, hydrogen sulfide, etc. in the warehouse in real time, and transmit the data to the control system for processing and analysis. The coal powder silo process analysis system automatically completes sampling, purging, drainage and other operations, and automatically analyzes output signals, such as 4-20mA signals or data transmission through RS485 and other methods. When the detected gas concentration exceeds the set range, a chain reaction will quickly occur and an alarm will be triggered, providing effective protection for safety production.

Measurement steps of coal powder silo process analysis system:

1. Automatic sampling: The system has an automatic sampling function, which can collect gas samples from the coal powder silo at preset time intervals or trigger conditions. This step ensures the representativeness and timeliness of the sample, providing an accurate data foundation for subsequent analysis.

2. Automatic blowing: After sampling, the system will automatically blow the sampling pipeline to remove residual gases and impurities, avoid cross contamination between different samples, and ensure the accuracy of each measurement.

3. Automatic drainage: The system may contain moisture or other liquid components that can affect the accuracy of analysis results. Therefore, the system is equipped with an automatic drainage device to promptly drain accumulated water and ensure unobstructed gas channels.

4. Automatic analysis output: The collected gas sample will be sent to the analysis instrument for composition and concentration analysis. This system usually uses various detection technologies such as electrochemistry, magnetic oxygen, Siemens, etc., which can accurately measure the content of gases such as CO, H, CH, N, O, etc. After the analysis is completed, the system will output the results in the form of 4-20mA signals, facilitating data exchange and interlocking control with the main control room.

5. Participate in interlocking control: Based on the analysis results, the system can perform interlocking control with production equipment. For example, when a certain gas concentration exceeds the standard, the system can automatically initiate corresponding safety measures, such as closing valves, cutting off power, etc., to prevent accidents from occurring.