The TR-9300D flue gas ultra-low emission continuous monitoring system
The TR-9300D flue gas ultra-low emission continuous monitoring system is based on HJ76-2017, HJ75-201 7 and other relevant standards and specifications, and has obtained the "Environmental Protection Product Certification Certificate" CC EP issued by the China Environmental Protection Industry Association. Its analytical instrument adopts the J NYQ-S-8 1 flue gas analyzer independently developed by Xi'an Juneng Instrument Co., Ltd., and the single monitoring system adopts the architecture mode of the monitoring platform probe pretreatment IPC LCD monitor data acquisition instrument to complete the functional requirements for the reception, storage, display and transmission of monitoring data.The complete extraction system is used to extract the flue gas from the flue gas through a special ultra-low flue gas heating sampling probe, and after heat tracing transmission, the flue gas is transmitted to the flue gas analysis cabinet for dust removal, ultra-low emission flue gas special condenser water removal and other treatments, and then enters the J NYQ-S-8 1 flue gas analyzer for monitoring and analysis, and the monitoring data is transmitted to the industrial computer and data acquisition instrument for storage and transmission. The analyzer adopts the DOAS method, and the basic principle is to use the narrow-band absorption characteristics of the molecules of the substance to be measured to distinguish and invert the concentration of the gas to be measured. It is not affected by other interfering gases such as water vapor, and the measuring principle determines that the zero point of the instrument is basically drift-free.
· Flue gas composition continuous monitoring system
· Flow detection system
· DAS system
· The ultraviolet differential technology is used to measure SO2 and NO without being affected by other interfering gases such as water vapor
· The measurement results are not affected by the energy fluctuation and attenuation of the light source
· The measuring principle ensures that the zero point of the instrument is basically drift-free
· The ultra-low special phosphoric acid condenser is adopted, and the unique phosphoric acid dosing technology avoids the loss of SO2
· The system is equipped with a high-efficiency NOX conversion furnace, and the conversion rate is greater than 95%, which meets the requirements of environmental protection testing
· It adopts PLC control, high degree of automation and small maintenance workload
· The system is designed with modular structure and flexible configuration
· The system has strong anti-interference performance
· The system is simple to operate and easy to maintain
· The system has high measurement accuracy
· The system has high data acquisition accuracy
· The lower limit of monitoring is low, which is suitable for online monitoring of ultra-low emission gaseous pollutants
A: NOxconverter unit
NOX is one of the important components in the monitoring of gaseous pollutants, and the composition of NOX is more complex, among which the main components are NO and NO2, which are generally considered to be composed in a certain proportion (95: 5), and the concentration of NO will be proportional in daily monitoring 1. 05 to NOx concentration. However, after denitrification and desulfurization, the actual proportion is constant and whether it is constant, which will directly affect the accuracy of NOx measurement. This product converts NO2 into NO, and determines the concentration of NO2 in the sample gas by measuring the concentration of NO after conversion, so as to improve the accuracy of NOx concentration measurement in the sample gas. The intelligent adjustable temperature controller and integrated heating components provide accurate and stable constant temperature heating for the catalyst to meet the optimal temperature requirements for the catalyst work. JN-T-0001 NOX converter uses catalyst with high efficiency and no interference with other components such as CO.
a:Principles and Applications
NO2→ NO, using the principle of catalytic reduction, through the integrated heating and temperature control components, the internal temperature of the converter reaches the working conditions of the gas and the converter internal conversion medium catalytic material, the sample gas enters from one end of the converter, and converts NO2 into a stable component of NO through adsorption in the converter. Whereas, catalysts are not involved in chemical reactions.
b:Technical parameters
| Working environment |
0-50ºC 0-90RH% |
| Heating temperature |
300-400ºC |
| Warm-up time |
≤30min |
| Nominal conversion efficiency |
≥95% |
| Maximum flow rate |
2L/ min |
| Catalyst replacement cycle |
1 -2 years |
| Power supply |
220VAC 50Hz |
| Ingress protection |
IP20 |
| Gas connection |
PV DF OD6/4mm ferrule |
| Dimensions |
450m mW*133mm H*268mm D |
| Device weight |
5 . 7 kg |
B:Ultra-low flue gas analyzer
J NYQ-S-81 ultra-low flue gas analyzer is an ultra-low flue gas analyzer independently developed by our company for environmental monitoring and industrial on-site discharge on-line gas analysis. The analyzer mainly measures the concentration of SO2, NO and O2 gases, and has the characteristics of high measurement accuracy, high stability and reliability, and fast response time. It is particularly suitable for extractive ultra-low emission CEMS systems.
a:peculiarity
· SO2 and NO(NO2) use ultraviolet differential spectroscopy, and compared with the traditional NIR, the measurement accuracy is theoretically not affected by moisture and dust, and there is basically no zero drift
· Spectroscopy is performed using a high-resolution spectrometer that is specifically optimized for performance analysis of flue gases
· The internal control of the instrument has high accuracy and good environmental adaptability
· No optical moving parts: no optical moving parts such as cutting wheels, filter wheels, interferometers, etc., with high reliability
· Modular design, light source, spectrometer, core circuit, gas chamber, oxygen sensor, etc. adopt modular design, high reliability, good scalability and easy maintenance
b:Measuring principle
(a) Beer-Lambert law
Gas absorption process
The Beer-Lambert law is the basis for the optical quantification of the concentration of a substance, characterizing the absorption of light by a substance at a specific wavelength. It can be seen that the concentration of the corresponding gas can be calculated by measuring the intensity of the incident light and the intensity of the outgoing light when the absorption cross section and the length of the optical path are known.
(b)Ultraviolet absorption cross-section of SO2, NO and other gases
SO2 and NO have obvious characteristic absorption lines in the range of 200-320nm, so it is very suitable for the simultaneous measurement of these two gases by ultraviolet spectroscopy.
Ultraviolet absorption cross-section
(c) DOAS technology
DOAS is the English abbreviation of differential absorption spectroscopy, and its basic principle is to use the narrow-band absorption characteristics of the molecules of the substance to be measured to distinguish and invert the concentration of the gas to be measured.
The absorption of light by the sample gas can be divided into two parts: one part changes rapidly with wavelength and forms the narrow-band fine structure of the spectrum, and this part is only related to the characteristic absorption of the gas to be measured; The other part changes slowly with wavelength and forms the broadband structure of the spectrum, which is not only related to the characteristics of some gases, but also related to the scattering of impurities in the sample gas.
DOAS technology separates the narrow-band absorption portion of the absorption spectrum, thus avoiding the effects of slow absorption of dust and other gases.
Differential spectral extraction
c:Optical path structure
The ultraviolet light emitted by the ultraviolet light source enters the gas cell after being aligned by the collimating lens, and the ultraviolet light absorbed by the sample gas is focused through the focusing lens and then coupled into the optical fiber and transmitted to the spectrometer. Through grating spectroscopy and CCD receiving optical signal for photoelectric conversion, the ultraviolet absorption spectrum of the gas to be measured is obtained. Finally, the concentration value of the gas to be measured is calculated by the software algorithm.
Analyzer optical path structure
d:Technical parameters
| Measuring range |
SO2: 0~ 20~ 200μmoI/ moI |
| NOX |
0~ 20~ 200μmoI/ moI(optional, customizable) |
| O2 |
0~ 25% |
| Precision |
≤±1%F. S |
| Stability |
Zero drift≤±1%F. S/ 7 d |
| Range drift |
≤ ± 1 % F. S/ 7 d |
| Sample gas flow |
1 . 5L/ min±0 . 5L/ min |
| Response time |
T90≤20 sec (when gas passes directly through the air cell) |
| Air chamber pressure |
≤20Kpa |
| Contact capacity |
120VAC , 1 A 24VDC , 1A |
| Output signals |
4~20mA or 0~10mA dc optional |
| Warm-up time |
≤ 30min |
| Working environment |
Temperature: -5 °C ~ 45°C
Humidity: ≤90% RH |
| Working power supply |
220VAC±10%,50Hz±5% |
| System technical parameters |
| Monitoring projects |
Measurement method |
Measuring range |
Zero drift |
Range drift |
Linearity error |
Output signal |
SO2
|
DOAS
|
0~20~200 μmoI/moI
|
±1% FS/7d
|
±1% FS/7d |
≤±1% FS
|
RS-232/485 4~20mA
|
NOX
|
DOAS
|
0~20~200 μmoI/moI
|
±1% FS/7d
|
±1% FS/7d |
≤±1% FS
|
RS-232/485 4~20mA
|
CO
|
Non-dispersed red absorption method |
0~200
μmoI/moI
|
±1% FS/7d
|
±1% FS/7d |
≤±1% FS
|
RS-232/485 4~20mA
|
O2
|
Electrochemical or magnetobaric |
0~25%
|
±1% FS/7d
|
±1% FS/7d |
≤±1% FS
|
RS-232/485 4~20mA
|
| Particulate matter (dust) |
Pre-laser scattering method |
0~ 5~200 mg/m3
|
±2% FS/7d
|
±2% FS/7d |
≤±3% FS
|
4~20mA |
| velocity of flow |
Differential pressure sensing |
0 ~40m/S
|
±5% FS/7d
|
±5% FS/7d |
≤±1% FS
|
4~20mA |
| pressure |
Differential pressure sensing |
60~ 140KPa
|
±2% FS/7d
|
±2% FS/7d |
≤±1% FS
|
4~20mA |
| temperature |
thermocouple |
0~ 500ºC
|
±1% FS/7d
|
±1% FS/7d |
≤±1% FS
|
4~20mA |
| humidity |
Capacitive method |
0~ 100%
|
±2% FS/7d
|
±2% FS/7d |
≤±1.5% FS
|
4~20mA |
Company Profile
Chongqing J&X Automation Co., Ltd. Specializes in researching and manufacturing gas detection and alarm instruments, gas detectors, gas alarm controllers, toxic and harmful gas detection and alarm instruments, independent alarms, air quality monitors, infrared gas analyzers, laser methane remote sensing equipment, laser dust detectors, etc.
Our products are widely used in various industrial sites requiring explosion-proof and poisoning prevention, such as mining and metallurgy, environmental protection, archaeological exploration, steelmaking, petrochemicals, gas, municipal firefighting, refrigeration, cargo ships, pharmaceuticals, rubber, hazardous chemicals storage, and industrial manufacturing.
We focus on the market, pay attention to quality, continue to innovate, master core technologies, and serve with heart. The company has the detection equipment and technological conditions required for the production of gas detection instruments and is professional and dedicated. It has a high reputation in the field of gas detection and its customer recognition, providing strong guarantees for pre-sales consultation and after-sales service of the products sold.
The establishment, design, and research and development of our products are in line with market demands and quality and technical requirements. The instruments have exquisite appearance designs, stable detection data, and explosion-proof designs for both gas detectors and portable detectors. Our stable quality products have successively obtained national licenses for the manufacture of measuring instruments, national explosion-proof electrical product certificates, and national explosion-proof electrical equipment installation and repair qualifications.
Adhering to the service philosophy of "perfection, efficiency, and innovation, " we are dedicated to providing society and enterprises with safe and stable production and life security.
Audited Supplier 
){kind=link}