VOCs online pollution source monitoring system Monitoring pretreatment system

Product description of VOCs online pollution source monitoring system:


TH-3000-VOCs online pollution source monitoring system is mainly used for online monitoring and analysis of various air emission pollution sources and online monitoring of plant boundary concentration.


The main principle is: the sampling unit collects the flue gas or the gas to be measured on site, the pretreatment unit filters the dust, reduces the temperature of the gas, electric heating and heat preservation, double-effect dehumidification, and keeps the temperature and humidity of the gas to be measured within a certain range , And then through the gas detection and analysis unit for detection and analysis, the measured gas concentration is displayed on the display screen in real time, and the data signal is transmitted to the terminal such as PLC or computer, and it can also be transmitted to the cloud server through wireless GPRS or network. Reading data from the server can realize global network monitoring and analysis.


The whole process is automated and does not require human intervention.


The TH-3000-VOCs online pollution source monitoring system is suitable for gas detection and analysis in various temperature, humidity or dust situations, and is more suitable for analyzers that require gas dryness and cleanliness. Optional automatic blowback system, otherwise the dust filter needs to be manually maintained and cleaned regularly. The entire sampling pipeline has the functions of heat preservation and electric heat tracing constant temperature control, which not only facilitates the removal of water vapor but also prevents part of the gas from dissolving in the condensed water to improve the accuracy of detection and analysis. The freezing environment in winter prevents the sampling pipeline from freezing. TH-3000 has a built-in double-effect compressor water-cooled dehumidification system and a 1-meter fine dust filter sampling head (flange installation), a sampling distance of 70 meters, automatic cooling, automatic drainage, and tar filtering. The stability of the gas can be controlled at 4°C or 5°C to meet the requirements of the humidity and cleanliness of the gas by the analytical instruments of various principles.






VOCs online pollution source monitoring system refers to laws and regulations:


"Emission Standard of Air Pollutants for Thermal Power Plants" GB13223-96


The "Law of the People's Republic of China on the Prevention and Control of Air Pollution" came into effect on September 1, 2000


"Technical Specification for Typical Equipment of Continuous Flue Gas Monitoring System in Thermal Power Plants" G-HB97-01


"Technical Regulations for Continuous Monitoring of Flue Gas Emissions in Thermal Power Plants" HJ/T-2000


"Measurement of Particulate Matter and Sampling Method of Gaseous Pollutants in Emission of Stationary Pollution Sources" GB/T16157-1996


"Technical Conditions of Flue Gas Sampler" HJ/T47-1999


"Technical Conditions of Flue Gas Sampler" HJ/T48-1999


"Technical Specification for Continuous Monitoring of Smoke Emissions from Stationary Pollution Sources" HJ/T75-2007


"Fixed pollution source flue gas continuous monitoring system requirements and detection methods" HJ/T76-2007






Product features of VOCs online pollution source monitoring system:


Outdoor waterproof design, protection and other IP66, rapid detection and analysis, stable and reliable.


The standard sampling distance is 70 meters, and the gas analysis unit can be built into the chassis or externally.


The standard pretreatment temperature is 800℃, which can pretreat the flue gas at 2000℃.


The 9-inch display screen can display various probe parameters and control other equipment.


Network transmission, 4-20mA input, RS485 input, 4-20mA output, RS485 communication.


Linux operating system, touch screen, 16G large capacity SD memory card, U disk storage.


Optional: wireless transmission, sound and light alarm, data printing function.






Introduction to the principle of VOCs online pollution source monitoring system:


The sample gas is processed according to the pressure, temperature, humidity, flow rate, (dust content), and cleanliness that the analyzer can accept. The main tasks are as follows:


Sample sampling: Use a vacuum sampling pump or a DC brushless pump to extract the sample gas from the flue and other environments


Dust filtration: The measured gas passes through a precision dust filter and then enters the sampling pipeline. If it is a dusty environment, an automatic blowback system is required.


Cooling treatment: The temperature of the sampling probe and the sampling pipeline can be cooled, and the gas within 2000 ℃ can be processed


Heat tracing function: heating, heat preservation, preventing water vapor condensation and part of the gas from dissolving in water, preventing the sampling pipeline from freezing in winter


Dehumidification system: double-effect compressor water-cooled dehumidification system, stable control of gas at 4℃ or 5℃, automatic drainage


Tar treatment: After the sample gas passes through the tar filter, the residual tar and residual dust are removed


Precise filtration: use a precise filter to re-defense the analytical instrument to prevent contamination and damage to the detection unit


Detection and analysis: real-time detection and display of the concentration, and the data is transmitted by 4-20mA/RS485 and other signal methods, and it can also be transmitted to a remote server or environmental protection bureau or monitoring station through wireless transmission or network transmission


Flow regulation: control the amount of gas intake


Gas switching: switch between measured gas, standard gas or air


After treatment: 4℃ or 5℃ can be set

Technical parameters of VOCs online pollution source monitoring system:


System Components:


Sampling unit


Sample gas pretreatment unit


Gas analysis unit


Detection parameters: VOCs, SO2, NOX, O2, CH4, CO, CO2, NH3, H2S and other gases, and can also detect wind speed,


Meteorological parameters such as wind direction, rainfall, atmospheric pressure, pipeline pressure, temperature and humidity can also be equipped with pitot tube to detect flue gas temperature,


Parameters such as pressure and flow


Measuring range: depending on the actual needs of the inspection site


Detection principle: PID photoion, other gas monitoring and analysis can choose electrochemistry, infrared (NDIR), laser (TDLAS),


Differential ultraviolet spectroscopy (DOAS) and other principles


Sampling temperature: -40℃~800℃ (standard), optional: -40℃~1300℃, -40℃~2000℃


Sampling humidity: 0~99%RH, wet gas can be pretreated


Host working environment:-40℃~70℃, ≤95%RH


Working mode: online continuous work, pump-suction sampling (positive pressure, negative pressure, vacuum environment are all possible)


Sampling distance: standard 70 meters


Sampling flow: adjustable, 4 liters/minute (standard), 10 liters/minute, optional


Working voltage: 220VAC, 50HZ


Output signal: 4~20mA, RS485, multiple passive contacts, optional: wireless transmission, network transmission


Dimensions: 1800mm*800mm wide*450mm thick


Protection: IP66 outdoor waterproof type


Display mode: 9-inch touch color screen display, display real-time concentration, real-time curve, average value and other parameters, linux operating system


Calculation method: The flue gas conversion method is converted by the reference oxygen content and converted by the conversion coefficient.


Operating system: Linux operating system or Windows7 operating system, supporting computer database and communication system software under windows environment, with


Equipped with rich man-machine interface, support mouse, U disk, keyboard, touch pad, printer and other equipment


Data storage: The default SD card storage, the storage capacity is 16G, the U disk storage is optional, the file storage is established in a folder on a daily basis, and the daily test data is stored separately


Printing method: optional built-in integrated printer or wireless bluetooth printer for printing


Alarm mode: optional sound and light alarm or external sound and light alarm


VOCs online pollution source monitoring system accessories list:


1 set of online monitoring pretreatment system (including 1 corresponding gas detector)


Product manual 1


Infrared remote control 1


PC computer connection software (sent by for free) 1 copy


RS485 modbus (RTU) communication protocol (send by ) 1 copy