7 results about "Co detection" patented technology

When the sensor triggers a dynamic event, transient response data segments are captured with high resolution, dynamic fingerprints reflecting different gas physicochemical property differences are extracted from the transient response data segments, then gas types are classified, gas identity probability distribution is obtained, and on the basis, the carbon monoxide sensor is obtained. The final CO concentration is calculated in combination with the transient response data segment, and risk assessment is performed based on the concentration to quantify the interference alarm level. Through the mode, the risk of missing report of a traditional electrochemical CO sensor under cross interference is solved, and the accuracy, robustness and intelligent level of CO detection are remarkably improved.

This invention discloses a carbon monoxide sensor and its filter preparation method. The filter comprises an activated carbon cloth layer and a thin film layer formed by slurry printing; the slurry contains, by mass, 20-60 parts of metal oxide, 5-10 parts of binder, 8-15 parts of dispersant, 40-80 parts of carrier, and 50-80 parts of solvent. In the preparation process, the metal oxide and dispersant are first mixed in ultrapure water, dried at 135°C, and crushed. Then, the mixture is ball-milled with the binder, carrier, and solvent to obtain the slurry. Finally, the slurry is printed onto a breathable substrate using a steel mesh or screen printing process to form a film. This sensor utilizes the activated carbon cloth to preferentially adsorb most organic vapors. Simultaneously, the metal oxide, after modification with the dispersant, has increased surface active sites, which can further catalyze the oxidation or chemical adsorption of residual organic vapors, effectively suppressing their poisoning or cross-interference on the electrochemical electrode. The printed thin film is dense and uniform, and combined with the ball milling composite process, it significantly improves the resistance to organic vapor interference, ensuring the selectivity and long-term stability of CO detection.

This invention proposes a bimetallic MOF-derived In 2 O 3 / Fe 2 O 3 Heterogeneous gas-sensitive materials, preparation methods, and applications. This invention features a simple and low-cost preparation process. It involves preparing a metal-organic framework In / Fe-MOF, and subsequently deriving In materials with n-n type heterostructures. 2 O 3 / Fe 2 O 3 Heterogeneous gas-sensitive materials utilize heterojunctions to create more oxygen vacancies, increasing the number of active sites and thus the concentration of adsorbed oxygen participating in the sensing reaction. Furthermore, the unique hollow porous structure provides even more adsorbed oxygen for gas diffusion and adsorption, further enhancing the gas-sensing effect on CO and improving the performance of pure In. 2 O 3 The gas-sensitive material exhibits an extremely high response to CO, along with excellent repeatability and selectivity. It can be used for highly sensitive CO detection, which is of significant practical importance for monitoring and real-time CO detection in industrial production activities.

The invention discloses a method for testing CO elimination in a 20L ball explosion system in a laboratory, and relates to the technical field of fire safety and gas detection and processing, and the method comprises the steps: preparing the 20L ball explosion system, a CO detection device, a CO elimination device, an ignition device and a data recording device, and checking the integrity and connection sealing performance of each device; the method comprises the following steps: putting a combustible substance to be tested into a 20L ball explosion system according to a set dosage, and sealing the system; the CO detection device is calibrated, and the detection precision of the CO detection device is ensured; the ignition device is started to trigger explosion, the CO eliminating device and the CO detecting device are started at the same time, and the data recording device records the CO concentration once every 5-15 seconds and continuously records the CO concentration for 4-6 minutes; according to the CO concentration data recorded by the data recording device at different time points, a curve of the CO concentration changing along with time is drawn. The high-precision CO detection device has the advantages that the high-precision CO detection device is adopted and strictly calibrated, CO concentration changes at different time points after explosion can be accurately captured, and the accuracy of a test result is improved.

The invention discloses a high-temperature corrosion risk hierarchical control method and system based on flue gas CO distribution characteristics. The system comprises a distributed CO detection array, an embedded processor and an execution module. The distributed CO detection array collects the CO concentration of a hearth outlet in real time; the embedded processor runs a distribution function correction algorithm; the execution module adjusts the operation oxygen amount or the opening degree of a wall-attached air door and a secondary air door according to the risk level. At present, most units cannot realize online detection of the CO concentration in the adherent atmosphere, the system monitors the high-temperature corrosion risk level of the water cooling wall through the CO concentration of a hearth outlet, a differential control strategy is provided, the high-temperature corrosion problem of the water cooling wall of the boiler is effectively relieved, and the efficiency of the boiler is improved.

The invention discloses a Pd-SnO2 / CMK-3 gas-sensitive composite material, a preparation method thereof and application of the Pd-SnO2 / CMK-3 gas-sensitive composite material in CO room-temperature sensing, and the preparation method comprises the following steps: grinding and mixing PdCl2 and SnO2, then adding CMK-3, continuously grinding so that a sample finally presents uniform black powder, and then calcining to obtain the Pd-SnO2 / CMK-3 gas-sensitive composite material. The Pd-SnO2 / CMK-3 nano gas-sensitive composite material provided by the invention can realize high-sensitivity CO detection in a low-temperature range from room temperature to 100 DEG C; excellent response / recovery characteristics are achieved, the response time is short, and recovery is rapid; the material is simple in preparation process, good in repeatability and suitable for large-scale application.

The utility model discloses an anti-blocking and anti-spontaneous combustion system for a stock bin, and relates to the technical field of production safety. Comprising a stock bin, an anti-blocking device, a gate valve, a discharging and feeding machine, a wall cleaning device, a temperature monitoring device, an anaerobic system, a CO detection device and a control system. An anti-blocking device is arranged in a material unloading area of the stock bin; a wall cleaning device is arranged on the side wall or the inner surface of the stock bin; a discharging and feeding machine is arranged at the bottom of the stock bin, and the gate valve is arranged between a discharging opening of the stock bin and a feeding opening of the discharging and feeding machine. The medium release end of the anaerobic system is communicated with the stock bin, the temperature monitoring device is arranged on the side wall or in the stock bin, and the CO detection device is arranged in the top space of the stock bin; the control system is used for receiving monitoring signals of the temperature monitoring device and the CO detection device and controlling the operation states of the anti-blocking device, the wall cleaning device and the anaerobic system. The utility model has the functions of preventing blockage and spontaneous combustion of the stock bin.