Gas pretreatment box

1、 Product Overview

Gas pretreatment boxIt is a key pre-processing equipment in industrial gas analysis systems, mainly used for filtering, drying, stabilizing pressure, stabilizing flow, cooling and other treatments of sample gas, ensuring that the gas entering the analysis instrument meets the detection requirements, protecting precision analysis equipment and improving the accuracy and stability of measurement data. Widely used in online gas analysis systems for environmental monitoring, petrochemicals, metallurgy and steelmaking, biomedicine, food fermentation, and other fields.

2、 Main functional features

1. Multi level filtering functionUsually equipped with coarse filters, fine filters, and oil removal filters, it can effectively remove dust particles from the sample gas (with a filtration accuracy of up to0.1μm）Prevent clogging and contamination of sensors or detection units of subsequent analytical instruments with impurities such as oil stains and aerosols.

2. Efficient drying and dehydrationUsing high-performance desiccants (such as color changing silica gel, molecular sieve, etc.) or membrane drying technology to reduce the dew point of the sample gas to the allowable range of the analytical instrument (usually≤-40℃Or lower), to avoid interference of moisture on the detection results and damage to the equipment.

3. Stable voltage and current controlBy using high-precision pressure reducing valves, stabilizing valves, and mass flow controllers, the sample gas pressure is stabilized at0.2-0.4MPa(Adjustable), flow control within0.5-2L/min(Set according to instrument requirements), ensure stable gas flow and pressure entering the analytical instrument, and improve the repeatability of analytical data.

4. Rapid cooling treatmentFor high-temperature sample gases (such as boiler flue gas, industrial furnace exhaust gas, etc.), integrated high-efficiency heat exchangers (such as fin and coil type) are used to reduce the sample gas temperature from hundreds of degrees Celsius to40℃Below, protect subsequent equipment from high temperature damage.

5. Online monitoring and alarmSome models are equipped with pressure sensors, temperature sensors, and flow sensors to monitor key parameters during the preprocessing process in real time, and have alarm functions such as overpressure, overtemperature, and abnormal flow. Alarm signals can be output through indicator lights or communication interfaces.

6. modular designEach functional unit (filtration, drying, voltage stabilization, cooling, etc.) adopts a modular structure, which facilitates installation, maintenance, and replacement of consumables, shortens maintenance time, and reduces operation and maintenance costs.

7. Explosion proof and anti-corrosion designFor environments with flammable, explosive, or corrosive gases, the enclosure adopts an explosion-proof design (compliant withEx d IIB T4According to explosion-proof standards, corrosion-resistant materials (such as316LStainless steel and polytetrafluoroethylene are used to ensure the safe and reliable operation of the equipment.

3、 Working principle

The sample gas first enters through the sampling probeGas pretreatment boxRemove large particulate dust and liquid impurities through a primary filter; Then enter the cooling device (if the sample gas temperature is too high), and reduce the temperature to the set range through heat exchange; The cooled sample gas enters the drying unit to remove moisture; Then it is further purified through a fine filter; Finally, the pressure and flow rate are adjusted through a pressure regulator valve and a flow controller, and the processed clean, dry, pressure and flow stable sample gas enters the analytical instrument for component detection. Throughout the entire process, sensors monitor the parameters of each link in real-time, and if any abnormalities occur, an alarm mechanism is triggered.

4、 Technical parameters

·Processing gas typeAir, flue gas, process gas, natural gas, etc. (adapted according to specific models)

·Processing traffic range：0.5-5L/min(Customizable)

·filtration accuracy：≤0.1μm

·Dew point control：≤-40℃(Under normal pressure)

·Cooling ability: Inlet temperature≤600℃(Air cooled)/≤1000℃(Water cooling), outlet temperature≤40℃

·Range of work pressure: Inlet pressure0.1-1.0MPaExport pressure0.2-0.4MPa(Adjustable)

·Operating Temperature: Environmental temperature-20℃~50℃

·power supply：AC 220V±10%，50Hz(orDC 24VAccording to the configuration)

·Box materialCold rolled steel plate spray coating (standard type), stainless steel304/316(Anti corrosion type)

·Overall dimensionsAccording to different configurations, common sizes are600mm×400mm×800mm(Wide)×deep×High or customized

5、 Application scenarios

1. Environmental waste gas monitoringOnline monitoring system for flue gas from fixed pollution sources such as waste incineration power plants, chemical parks, and steel plants（CEMS）Yes, that's rightSO2TheNOxPre treat the sample gas for analyzing pollutants such as particulate matter.

2. Petrochemical Process AnalysisIn the production processes of oil refining, ethylene, synthetic ammonia, etc., process gases (such asH2TheO2TheCOTheCH4Preprocess to provide accurate analytical data for process control.

3. Metallurgical industryPre treatment of gas components such as blast furnace gas and converter gas before analysis, optimization of production processes, and improvement of production efficiency in steelmaking and ironmaking processes.

4. BiomedicineDuring the fermentation process, the gas emitted from the fermentation tank (such asO2TheCO2）Perform preprocessing, monitor fermentation status, and ensure stable production process.

food industryIn the process of beer brewing, beverage production, etcCO2Pre treat the sample gas for gas purity analysis to ensure product quality.