Grain storage application of carbon dioxide gas detector
Carbon dioxide gas detectors are used in grain storage projects. This article introduces the application of the automatic monitoring system for CO2 concentration in grain silos in grain storage projects. The use of infrared gas analyzers to monitor CO2 concentration in grain silos has high accuracy, reliable performance, and can be used for long-term continuous online measurement. Controlled atmosphere grain storage provides an effective way to control CO2 concentration. Among them, the CO2 automatic monitoring system uses advanced detection and automatic control technology to realize fully automatic measurement and data processing of CO2 concentration in the granary.
This system is the key to realizing the controlled atmosphere process and ensuring process concentration. Its main functions are: real-time automatic collection, conversion and transmission of granary CO2 data, data display, printing, data management (including data recording, data analysis and processing, Alarm prompts, reserved data communication, etc.), and has a switching function between manual and automatic operations, which can realize open setting and adjustment of system parameters, making it easy to upgrade, update and optimize settings.
The schematic diagram of the system is as follows: Keywords: grain storage, CO2 atmosphere-controlled grain warehouse, infrared gas analyzer 1. Overview Grain storage engineering is a systematic project integrating agriculture, biology, architecture, environmental protection, chemical industry, instrumentation, computer technology and other disciplines. With the rapid development of my country's modernization construction, the construction of "green granary" is the current grain storage an important issue in the industry. During the grain storage process, in order to ensure the quality of the stored grain, it is necessary to prevent damage by stored grain pests and molds in the grain.
For a long time, our country has usually used chemical agents such as phosphine and ethylene oxide to fumigate grain to kill pests. Research on carbon dioxide (CO2) controlled atmosphere grain storage technology began with insecticide tests as early as 1917. After the 1940s, the use of cheap pesticides limited its development. Since then, pesticide residues, environmental pollution, Problems such as the damage to the ecological environment and the increase in pest resistance have attracted increasing attention. The demand for natural and green food has made the CO2 controlled atmosphere grain storage method attract people's attention again. The United States, Japan, Russia, Australia and other economically developed countries The country has gradually reduced the use of chemical agents in grain storage, and has developed towards ecological grain storage with low temperature, controlled atmosphere, physical and biological comprehensive control, and has conducted a large number of research and experiments on CO2 controlled atmosphere grain storage technology, and has carried out Successfully applied and established commercial usage specifications.
During the construction of the CO2 controlled atmosphere grain storage project, a large-scale gas supply and distribution system was used in the grain warehouse for centralized gas supply, and an automatic monitoring system for CO2 concentration in the grain warehouse was adopted. Its main facilities include a CO2 gas supply system, a CO2 automatic monitoring system, an intelligent ventilation control system, a warehouse safety device, and a backpack oxygen respirator. As shown in the figure below: CO2 atmosphere control system process flow diagram, among which the CO2 automatic monitoring system uses advanced detection and automatic control technology to realize fully automatic measurement and data processing of CO2 concentration in the granary.
