566 results about "Gas analyzer" patented technology

Aspects relate to a compact and low-cost gas analyzer that can be used for different types of gas analysis, such as air quality analysis. The gas analyzer can include a light source, a gas cell configured to receive a sample (e.g., a gas under test), a spectral sensor including a spectrometer and a detector, and an artificial intelligence (AI) engine. Light can enter the gas cell and interact with the sample to produce output light that may be measured by the spectral sensor. The resulting spectrum produced by the spectral sensor may be analyzed by the AI engine to produce a result. The gas analyzer further includes a self-calibration component configured to enable calibration of the sample spectrum to compensate for spectral drift of the spectral sensor.

The invention relates to the technical field of gas detection, and provides a doped gas concentration detection method and system based on a gas analyzer. The method comprises the following steps: constructing a standard spectrum database under the same pressure and temperature as a to-be-measured site; the method comprises the following steps: introducing sample gas into an optical absorption cell, carrying out wavelength scanning through a tunable diode laser in a plurality of adjacent absorption spectral line intervals containing target gas and interference gas, superposing a high-frequency sinusoidal modulation signal on a driving current, and synchronously detecting a second harmonic component of transmission laser to generate an actual measurement spectrum; fitting the actually measured spectrum with a synthetic spectrum generated on the basis of a standard spectrum database, and outputting a target gas concentration ratio as a detection result when a residual error meets a threshold value, so as to solve the technical problem that the detection precision is reduced due to spectrum overlapping caused by interference gas, and achieve the purpose that the detection precision is reduced by constructing the standard spectrum database and second harmonic spectrum fitting analysis. And the accuracy and the anti-interference capability of gas detection are improved.

The invention discloses a lime kiln monitoring system based on multi-source data dynamic fusion, which is characterized by comprising a thermal imager, an infrared sensor, a pressure sensor, a gas analyzer and an edge computing node, the edge computing node is configured with a Raspberry Pi platform and an LSTM neural network accelerator and is used for executing multi-source data preprocessing and feature compression, and the Raspberry Pi platform and the LSTM neural network accelerator are connected with the thermal imager. The system also comprises a working condition analysis system, and the working condition analysis system comprises a ring formation prediction model based on ST-GCN, a combustion optimization model based on DDPG, and an anomaly detection model based on an isolated forest and automatic encoder hybrid model. The invention aims to solve the limitation of a traditional monitoring system, realize real-time monitoring and accurate control, improve the equipment health management and predictive maintenance capability, optimize waste heat recovery and energy utilization, and enhance man-machine interaction and operation convenience.

The invention provides a gaseous pollutant Fourier transform infrared spectroscopic analysis method based on deep learning. The gaseous pollutant Fourier transform infrared spectroscopic analysis method comprises the following steps: acquiring infrared absorbance spectrums of different gases to be detected by utilizing a Fourier transform infrared gas analyzer; the method comprises the following steps of: preprocessing the collected spectral data, namely carrying out segmented denoising on the original spectral data by adopting a self-adaptive Savitzky-Golay filter, and carrying out normalization processing to balance a data range; carrying out feature extraction on the preprocessed spectral data by utilizing a one-dimensional convolution deep learning model so as to adapt to one-dimensional FTIR spectral features and realize feature extraction of multiple components of gas; mapping the extracted features to a prediction result of the to-be-detected component by applying a full connection layer of the model; and training and optimizing the model by adopting an MSE regression loss function. According to the invention, the processing capability of the gaseous pollutant spectral signal can be effectively improved, and high-precision multi-component quantitative analysis is realized.

The invention relates to the technical field of coal mine safety monitoring, in particular to a coal spontaneous combustion temperature prediction method based on an ACO-BP neural network model. The method comprises the following steps: carrying out gas collection on a space in which coal is located through gas monitoring equipment at preset time intervals to obtain gas corresponding to the coal; component and concentration analysis is conducted on the gas through a gas analyzer, a gas concentration data set is obtained, and the gas concentration data set comprises concentration data corresponding to at least one gas; and inputting the gas concentration data set into a target ACO-BP neural network model for identification processing, predicting a first temperature corresponding to the coal, and determining spontaneous combustion information of the coal according to the first temperature. According to the invention, the accuracy and convenience of coal spontaneous combustion temperature prediction can be improved.

The invention discloses a fertilizer storage monitoring system based on the Internet of Things. The fertilizer storage monitoring system comprises an environment sensing module, an equipment control module, a communication networking module, a central processing platform and a user terminal module, the environment sensing module comprises temperature and humidity sensors, a gas concentration detector, a pressure sensor and a three-dimensional space positioning device which are distributed at different positions of a storage space, the temperature and humidity sensors are deployed by adopting a honeycomb topological structure, and each temperature and humidity sensor comprises a dual-mode temperature and humidity probe and a self-calibration circuit; the gas concentration detector comprises an ammonia gas sensor, a methane sensor and a multispectral gas analyzer. When the warehousing system is monitored, the environment where the fertilizer is located can be comprehensively mastered by monitoring information such as the temperature, the humidity, the gas concentration and the pressure in the warehousing space, whether the fertilizer goes bad or is prone to going bad or not is judged, and the problems that manual judgment is not standard and not accurate are completely eradicated.

The invention discloses a defect self-detection laser welding device and belongs to the field of laser welding, a driving disc is assembled at the top of an electric rotating disc, the driving disc is fixedly connected to the top of a gas analyzer body, a pawl is hinged to the inner wall of the driving disc, and a connecting ring is rotatably connected to the outer wall of a fixing rod; and the inner wall of the connecting ring is fixedly connected with a connecting rod. The steel pipe is fixed to the top of the base, the electric rotating disc is started to drive the welding gun body and the gas analyzer body to rotate forwards and backwards, welding operation and detection work of the steel pipe can be accurately completed, after laser welding is completed, the air pump is started to inject gas into the steel pipe, and the gas analyzer rotates and analyzes gas components of the steel pipe; the pawl and the ratchet wheel are driven by the driving disc to rotate clockwise, and the two ends of the steel pipe are blocked by the hydraulic system, so that the accuracy of a gas analysis process is guaranteed, and whether defects and gas leakage exist in the steel pipe is detected.

The application provides a multi-gas control device, a use method and an application, and relates to the technical field of biological gas fermentation. The device comprises a gas supply module, the gas supply module comprises multiple groups of gas sources and connecting pipelines, each gas source is connected to an air inlet pipeline through a respective connecting pipeline, a secondary pressure reducing valve, a T-shaped filter, a mass flow meter, a stop valve, a regulating valve and a check valve are sequentially arranged on the connecting pipeline, the air inlet pipeline is connected to a liquid circulation pipeline, gas is discharged from a spraying mechanism connected to the liquid circulation pipeline, the spraying mechanism is arranged in a fermentation tank, the spraying mechanism is connected to a circulating pump through the liquid circulation pipeline, the circulating pump is connected to the bottom of the fermentation tank through a pipeline, the top of the fermentation tank is connected to a detection pipeline, and a precision filter, a vacuum pump, a drying device, a pre-analyzer and a gas analyzer are sequentially arranged on the detection pipeline. The application realizes efficient absorption and utilization of multiple gases, and simultaneously obtains high yield and high quality single-cell protein.

The invention discloses an underwater in-situ gas analyzer suitable for deep sea extreme environment, which comprises a pressure-resistant cabin body, the pressure-resistant cabin body comprises a main body cabin, a front end cover and a rear end cover are respectively mounted at two ends of the main body cabin, a fixed bracket is fixedly connected in the main body cabin, and a vacuum detection cavity, a primary vacuumizing pump and a secondary vacuumizing pump are mounted on the fixed bracket. The primary vacuumizing pump and the secondary vacuumizing pump are both communicated with the vacuum detection cavity, the vacuum detection cavity is communicated with a gas component analyzer, a vacuum air pressure detection device is installed on the vacuum detection cavity, and the underwater in-situ degassing device is communicated with the vacuum detection cavity through a pipeline. And the first-stage vacuumizing pump, the second-stage vacuumizing pump, the gas component analyzer and the vacuum air pressure detection device are electrically connected with the control circuit system. The device can stably and continuously work in a deep-sea high-pressure low-temperature environment, is convenient to disassemble, assemble, transport and maintain, and can be widely applied to extreme environments such as deep-sea hydrothermal liquid, cold springs and hydrogen-rich nozzles.

The invention discloses an atomic layer deposition gas supply system for a low saturated vapor pressure precursor source, and belongs to the technical field of atomic layer deposition reaction equipment. According to the system, a mass flow controller is combined with an original gas inlet pneumatic valve, so that the gas quantity in a precursor source bottle in the deposition process is accurately controlled; the pressure in the precursor source bottle is monitored in real time through a pressure meter, so that the temperature in the deposition process is accurately controlled; in addition, specific contents of precursor source gas and auxiliary gas in source gas are monitored in real time through a gas analyzer at a source outlet, so that a system is assisted to judge whether reaction gas needs to be supplemented or not; the mass flow controller, the pressure meter and the gas analyzer are all connected with the PLC, and control of all the parts is achieved through the PLC; and gas control, pressure monitoring and component monitoring of the low saturated vapor pressure precursor source in the experiment process are realized.

The invention discloses a multi-component laser gas analyzer based on front-end pretreatment, and relates to the technical field of gas detection, the multi-component laser gas analyzer specifically comprises a portable box, a control panel is arranged in the portable box, and a laser gas analysis mechanism is mounted in the portable box and located at the bottom of the control panel; the problem of spectral signal distortion caused by a high-dust and high-humidity environment in industrial gas detection is solved through a front-end pretreatment self-adaptive technology, system downtime caused by single-path blockage is avoided through a double-pipeline redundancy design aiming at the high-dust and high-humidity environment, rapid dehumidification and cooling of a compression and condensation assembly are combined, and the detection efficiency is improved. According to the multi-component laser gas analyzer system, a laser gas analysis mechanism can stably obtain high-precision spectral signals under complex working conditions, meanwhile, multi-stage intelligent early warning and filter element health management are adopted in the system, the maintenance cost is reduced, the service life of equipment is prolonged, the integrated design of the portable box supports on-site rapid overhaul, and the detection efficiency of the whole multi-component laser gas analyzer is improved.

A gas emission monitoring system is configured for versatile deployment across various sites, including gas extraction locations, industrial settings, and environmental monitoring areas. The system may include a support structure holding a plurality of tubings, each equipped with at least one intake port. The tubings may be interconnected through a connecting tubing that ultimately links to an analysis tubing feeding into a gas analyzer. The design ensures that the intake ports are strategically positioned at different vertical levels relative to the ground, for example, for optimized air sampling. The gas analyzer may be configured to identify multiple types of gas content in a received air mixture, which is collected from the various intake ports. Thus, the systems discussed herein may provide a comprehensive, adaptable solution for real-time gas monitoring, capable of handling a broad range of gases and environmental conditions.

The utility model discloses a process parameter experiment and selection device for harmless treatment of chemical waste salt, which comprises a reaction furnace, a movable reaction device, a gas inlet pipe, a gas cylinder, a gas outlet pipe, a cold trap and a gas analyzer, the movable reaction device is mounted at an opening in the lower end of the reaction furnace through a sealing flange, and comprises a sample bearing part for feeding a sample into the reaction furnace; a gas inlet pipe is arranged in the movable reaction device, and the gas cylinder is connected with a gas inlet of the gas inlet pipe and used for inputting reaction atmosphere into the reaction furnace; gas generated by the reaction of the sample in the reaction furnace is output through an upper end gas outlet pipe; the cold trap is used for cooling and filtering gas generated by reaction; and the gas analyzer is connected with the cold trap and is used for performing component analysis on the gas filtered by the cold trap. According to the utility model, technological parameters of harmless treatment can be quickly determined by using a small amount of waste salt.

The invention relates to the field of gas mixing systems, and discloses a gas mixing system based on high-pressure proportional valve control. The system comprises at least two gas branches, and each gas branch is provided with a high-pressure proportional valve communicated with a gas inlet and a one-way valve located at the downstream of the high-pressure proportional valve. The mixing unit is used for mixing the gas of each gas branch in a high-pressure state; the energy storage unit is communicated with the mixing unit and is used for temporarily storing the mixed high-pressure gas; the detection control unit comprises a gas analyzer communicated with the energy storage unit and a controller electrically connected with the gas analyzer, and the controller adjusts the opening degree of the high-pressure proportional valve in a closed-loop mode according to detection signals of the gas analyzer, so that the target component concentration of the mixed high-pressure gas is maintained within a preset range. The system can directly realize accurate proportioning and dynamic adjustment of multi-component gas on a high-pressure side, reduces lag and energy consumption of a low-pressure mixing scheme, and is suitable for high-pressure laser welding, material testing and other scenes needing quick response and high-precision proportion control.

The invention discloses a closed-loop type mixed gas flux measurement system, and relates to the technical field of flux measurement, a gas path structure of a gas analyzer in the measurement system is designed by combining serial gas pools with a sucking pump, and a group of TDLAS sensors are arranged at a phosgene gas path of each gas pool respectively; the specifications of the phosgene paths of the gas pools and the TDLAS sensors are matched and designed according to the characteristics of various to-be-detected gases, and in the gas extraction process of the gas extraction pump, the measurement host performs concentration calculation by using data of the TDLAS sensors and then completes transmission time delay compensation with the three-dimensional ultrasonic wind, so that the concentration measurement results of the various to-be-detected gases can be obtained through calculation. Cross interference of different gases is avoided, and synchronous measurement of various to-be-measured gases can be basically realized in an error range, so that the accuracy, reliability and efficiency of flux measurement are improved, and all-day and all-weather measurement of flux can be realized.

The invention discloses an ultraviolet absorption gas analyzer, and relates to the technical field of gas analyzers. The ultraviolet absorption gas analyzer comprises an analyzer outer shell, the analyzer outer shell is connected with a first supporting seat and a second supporting seat, the first supporting seat is fixedly connected with a light source supporting seat, the light source supporting seat is provided with an ultraviolet light source generator, a rotating disc is rotatably connected between the first supporting seat and the light source supporting seat, and the rotating disc is provided with a rotating shaft. A plurality of groups of optical filter main bodies are arranged on the rotating disc, a measuring air chamber is arranged between the first supporting seat and the second supporting seat, and a light source receiver is arranged on the second supporting seat. According to the ultraviolet absorption gas analyzer, on one hand, protection is provided for the optical filter main body, the optical filter main body is isolated from the external environment, on the other hand, when the optical filter main body is replaced, the replacement of a plurality of groups of optical filter main bodies can be realized only by rotating the rotating disc, and the replacement process is convenient to operate, time-saving and labor-saving.

The utility model discloses a protection structure for a laser window lens of an in-situ laser gas analyzer, which comprises a purging guide ring, a window lens support, a window lens compression ring and a purging shielding gas interface, and is characterized in that the purging guide ring, the window lens support and the window lens compression ring are respectively arranged in a window lens sleeve; the purging shielding gas interface is mounted on the window lens sleeve, and the window lens is positioned between the window lens support and the window lens compression ring; and the purging guide ring is positioned on the outer side of the window lens. When the protection structure is installed on the in-situ laser gas analyzer, when the in-situ laser gas analyzer works, the blowing protection airflow can effectively reduce the temperature of a laser window lens and stabilize the working temperature of the laser window lens; and external dust, particles, harmful gas and the like are prevented from polluting and corroding the window lens and blowing and cleaning the window lens.

The invention provides a vehicle tail gas detection device, and relates to the technical field of tail gas detection, the vehicle tail gas detection device comprises a gas analyzer, the front end of the gas analyzer is provided with a connecting pipe, the outer side of the connecting pipe is provided with a gas inlet assembly, the gas inlet assembly comprises a storage pipe, and one end of the storage pipe is slidably inserted with an insertion pipe; compared with the prior art, the gas inlet assembly can be inserted into a tail gas pipe to receive tail gas, the tail gas is fed into a gas analyzer to be detected through communication of the gas feeding assembly and the connecting pipe, and after each detection is completed, the tail gas is fed into the gas analyzer to be detected through the gas feeding assembly. The gas inlet assembly is withdrawn to automatically clean the inner wall of the analyzer, the two gas supply assemblies are used alternately, the interior is kept clean in a cleaning mode, meanwhile, tail gas is dispersed and conveyed through a plurality of branch pipes, most of heat of the high-temperature tail gas is conveniently dissipated, and electronic elements in the analyzer are prevented from being damaged.

The invention relates to the technical field of food preservation, in particular to a food preservation system and method, and the food preservation system comprises a detection assembly, a gas transmission assembly and a plurality of preservation cavities. The fresh-keeping cavity is provided with an air inlet valve, an air outlet valve, a temperature sensor and a circulating refrigeration component; the detection assembly comprises a detection cavity provided with a detection inlet and a detection outlet, a gas extraction part communicated with the plurality of gas outlet valves and used for extracting gas to the detection inlet, and a gas analyzer mounted in the detection cavity, and the gas analyzer is used for detecting the content of oxygen, carbon dioxide and ethylene; the gas conveying assembly communicates with the multiple gas inlet valves and is used for outputting oxygen, carbon dioxide and nitrogen. By means of the fruit and vegetable cold storage fresh-keeping device, fruits and vegetables can be subjected to cold storage fresh-keeping in a partitioned mode, the gas temperature and the gas content of oxygen, carbon dioxide and ethylene in each fresh-keeping cavity are controlled in the fresh-keeping process, it is ensured that the content of the three gases is kept within a controllable range, and the fruit and vegetable cold storage fresh-keeping qualification rate and the cold chain storage economic benefit are improved.

A portable gas analyzer includes multiple docking stations connected to a pneumatic flowpath through the gas analyzer. Modules are removably mounted to the docking stations. Some modules can be mounted at any one of the docking stations. The modules can include gas sensors and a microcontroller configured to generate data based on signals generated by the gas sensors. The modules are configured to simultaneously form each of electrical, mechanical, and pneumatic connections with the gas analyzer when mounted to the docking station.

The invention relates to the technical field of water electrolysis hydrogen production in the field of new energy, in particular to an electrolytic bath outlet gas analysis system which can conveniently judge the operation condition of an electrolytic bath, is low in input cost and comprises a gas-liquid separator, and a first electrolytic bath connecting pipe and a second electrolytic bath connecting pipe are arranged at one end of the gas-liquid separator; two front-section separation areas and a rear-section mixing area are formed in the gas-liquid separator through partition plates, the first electrolytic cell connecting pipe and the second electrolytic cell connecting pipe extend into the front-section separation areas respectively, and the front-section separation areas are connected with an analysis cooling tank through air entraining pipes. A gas outlet of the analysis cooling tank is connected with a gas analyzer, and a liquid outlet of the analysis cooling tank is connected with the gas-liquid separator through a return pipe.

A method for measuring gases generated by at least a portion of a battery cell includes arranging a test sample in a chamber. The test sample comprises one of a battery cell including terminals and a gas port and a test fixture including terminals and a gas port and housing at least a portion of a battery cell. The method includes connecting the gas port of the test sample to a node; supplying a carrier gas at a known pressure and flow rate to the node; sampling gas at or downstream from the node using at least one of a mass spectrometer and a gas analyzer; and determining concentrations of gases in the test sample using the at least one of the mass spectrometer and the gas analyzer.

The invention relates to the technical field of hydrogen production, in particular to a mixed water electrolysis hydrogen production system and method with multiple types of electrolytic cells cooperatively operated. The mixed electrolysis unit is composed of an alkaline electrolytic cell array and an anion exchange membrane electrolytic cell array, and the two arrays are connected into a hydrogen purification system in parallel through a multi-channel gas-liquid separator; the intelligent power supply module is electrically connected with the electrolysis unit, has a dynamic voltage regulation function, outputs a voltage range of 20-100V, and is integrated with a harmonic suppression circuit; the multi-dimensional sensing network comprises a distributed temperature sensor array embedded in an electrolytic bath pole plate, a multi-phase pressure detection unit of an electrolyte circulating pipeline and a laser gas analyzer of a hydrogen production pipeline; according to the scheme, the novel hydrogen production system capable of achieving efficient cooperation of multiple types of electrolytic cells and dynamically optimizing current distribution is provided, and the technical problem that wide-range load adaptability and operation energy efficiency are difficult to achieve at the same time is fundamentally solved.

The utility model discloses an explosion-proof type gas analyzer, which relates to the technical field of gas analyzers and comprises an analyzer explosion-proof shell and a fixing frame, one side of the analyzer explosion-proof shell is provided with an access hole, and the fixing frame is fixedly arranged on the outer side of the access hole. A cover plate is arranged on the side, away from the analyzer explosion-proof shell, of the fixing frame in an abutting mode, a plurality of through holes are formed in the surface of the cover plate in an annular array mode, threaded rods are movably inserted into the multiple through holes, one ends of the multiple threaded rods are fixedly connected with the side wall of the fixing frame, and the other ends of the multiple threaded rods are fixedly connected with the side wall of the analyzer explosion-proof shell. A sliding groove is formed in the side, away from the fixing frame, of the cover plate, a sliding block is arranged in the sliding groove in a sliding mode, an arc-shaped plate is fixedly arranged on the outer side wall of the sliding block, a thread is formed in the inner wall of the arc-shaped plate, and the thread on the inner wall of the arc-shaped plate is connected with the thread on the outer wall of the corresponding threaded rod in a clamped mode. According to the utility model, the explosion-proof housing can be opened in a time-saving and labor-saving manner, and internal elements of the explosion-proof housing can be conveniently maintained.

The invention discloses a sampling probe for gas analysis, and relates to the technical field of gas sensors, the sampling probe comprises a gas analyzer and a shell, the gas analyzer is connected with the shell, the shell is in bearing connection with a sampling mechanism, the sampling mechanism comprises a sampling tube, a filter screen, a second gear, a movable frame, a second piston, a second spring, a circular plate and a convex block, the sampling tube is connected with the shell through a bearing, and the right end of the sampling tube is of a trumpet-shaped structure. According to the sampling probe for gas analysis, the intermittent rotating mechanism is adopted, the adjusting effect of the sampling pipe in different directions can be achieved, the gas sampling effect in different directions can be achieved, the comprehensive detection effect can be achieved, and then the situation that gas flow influences the accuracy and comprehensiveness of detection data can be avoided; and when the sampling pipe rotates, gas in the sampling pipe can be discharged, so that the influence on the accuracy of detection data due to cross contamination of gas in different directions is avoided.

The invention discloses a gas analyzer fault early warning method and system based on battery state data, and relates to the technical field of data processing, and the method comprises the steps: collecting necessary parameters such as real-time terminal voltage and open-circuit voltage of an oxygen battery and auxiliary parameters such as an analyzer working mode; preprocessing the necessary sampling parameters and the auxiliary parameters, constructing an initial library, and marking interpolation nodes and unit operation intervals; obtaining and screening a parameter set based on the initial library and the interpolation node to obtain a third initial parameter set; constructing a discharge fault inflection point prediction model in combination with the discharge characteristics of the oxygen battery; a prediction parameter set is generated and imported into the model to obtain an undervoltage fault prediction inflection point; and generating alarm information based on the inflection point. The system comprises an acquisition module, a data processing module, a communication module, an early warning module and subordinate units, and the method is realized. The method has the advantages that fault risks can be recognized in advance, non-planned shutdown is reduced, accurate operation of the analyzer is guaranteed, and the method is suitable for environment protection monitoring and other scenes.

The invention discloses a method for determining carbon isotopes of low-concentration soluble organic carbon in a water body, and belongs to the technical field of organic carbon detection. The determination method comprises the following steps: combining a TOC analyzer and a stable isotope mass spectrometer, and converting DOC in a water body into CO2 gas by adopting the TOC analyzer; cO2 gas generated by the TOC analyzer is enriched for the first time through the cold trap T1; the CO2 gas frozen by the cold trap T1 is enriched for the second time through a cold trap T2; introducing the CO2 subjected to secondary enrichment into a stable isotope mass spectrometer, and determining the carbon isotope composition of the CO2. Aiming at a low-concentration DOC water body, the carbon isotope composition of DOC in the water body is determined on the basis of combination of a wet oxidation technology and stable isotope mass spectrometry detection, a wet oxidation method is used for increasing the volume of a water sample to generate more CO2 for stable isotope mass spectrometry determination, so that more accurate carbon isotope composition is obtained, and the method is efficient, time-saving, labor-saving and accurate.

Thermogravimetric Reactor (TGR) and process to study weight change behavior of carbonaceous solids / catalysts during thermo-chemical reactions in gaseous environment up to the maximum operating temperature of 1000° C. and at atmospheric pressure are disclosed. The device includes a vertical tube reactor, digital weighing balance, gas feeding system equipped with volumetric flow controllers, rotameters, isolation valves and non-return valves to introduce inert and reactive gases and their mixtures to the reactor. It also has a movable electrical furnace heater for sudden heating / cooling of sample as per requirement. It also has sample feeding / loading system comprising containers of different sizes and shapes with a hanging arrangement There is arrangement to test the product gas composition with on line gas analyzer in the exit line or collecting the outgoing gas from the sampling port for off line gas analysis. The system also has control panel to store and display data including process parameters.

The invention belongs to the technical field of gas concentration detection, and particularly relates to a rotary kiln infrared gas analyzer which comprises a shell assembly, a heat dissipation device is installed on the shell assembly, a gas suction device is installed at one end of the shell assembly, a filtering device is fixedly connected to the gas suction device, and a supporting plate is fixedly installed in the shell assembly. A detection gas chamber, a reference gas chamber and a correction gas chamber which are arranged in parallel are fixedly arranged on the supporting plate in a penetrating manner, and structures such as a processor, a controller, a temperature sensor, a gas pressure sensor, an electric heating wire and the correction gas chamber are arranged; the air temperature in the correction air chamber is heated to be the same as the air temperature in the detection air chamber through the electric heating wire, the air pressure in the detection air chamber is adjusted to be the same as the air pressure in the heated correction air chamber through the cooperation of the air pump and the exhaust valve, and then the detection result is calculated in equal proportion. The concentration of the target gas in the flue of the rotary kiln in the normal temperature state can be obtained, and the accuracy of a detection result is greatly improved.

The invention relates to a measurement station (1) for measuring suspended molecular contaminants, comprising:-at least one gas analyzer (3) configured to measure the concentration of at least one contaminant,-a plurality of air inlets (5) configured to be in fluid communication with said gas analyzer (3) and configured to be connected to a respective plurality of sampling lines (7), -a plurality of first controllable isolation valves (11) interposed between the plurality of air inlets (5) and the gas analyzer (3),-a control unit (15) configured to control the opening or closing of the first controllable isolation valves (11) so that the gas analyzer (3) is in fluid communication with at least one sampling line (7), wherein the control unit (15) is further configured to instruct verification of the accuracy of the analyzer (3) when the analyzer (3) detects that the pollutant concentration is greater than a predetermined threshold.