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Product information
product name: Flue gas laser online analyzer
product brand: Skyeaglee
Product number: SK-6500 series
Measurement object: Online detection of process smoke, environmentally friendly smoke emissions, and other process smoke.
product description
SK-6500 series flue gas laser online monitoring analyzer system is based on the principle of tunable semiconductor flue gas laser absorption spectroscopy (TDLAS) technology measurement. The product has high measurement accuracy, the measurement is not affected by background gas cross interference, fast response speed, high reliability With short maintenance cycle and low maintenance cost, it is preferred by more and more customers. Due to its unique advantages, the flue gas laser online monitoring analyzer system can be used in situ in iron and steel metallurgy, petrochemicals, thermal power generation and waste incineration, etc. Occasions, real-time monitoring of O2, CO, CO2, H2S, HCL, HF, CH4, H2O, and NH3 gas concentration content values.

Flue gas laser online monitoring analyzer system


接受单元 Flue gas laser online monitoring analyzer system receiving unit


发射单元 Flue gas laser on-line monitoring analyzer system launch unit


工作原理 The working principle of the smoke laser online monitoring analyzer system

可调谐半导体烟气激光光谱吸收技术(TDLAS)是利用烟气激光波长的可调谐性,烟气激光的发射波长随着工作温度和电流的变化而改变.通过对电流的周期性调制,可以使烟气激光波长在小范围内周期性变化,在每个周期内可以获得被测气体的”单线吸收谱线”数据和背景气体,粉尘等干扰因素的谱线数据.在气体检测与浓度分析中,为了提高探测灵敏度,一般会根据现场工况选择合适的吸收谱线和合适的烟气激光器调制参数,下图为烟气激光分析仪检测仪在线连续分析仪原 SK-6500 series smoke laser online monitoring analyzer system is based on the principle of tunable semiconductor smoke laser absorption spectroscopy (TDLAS) technology to measure and obtain the spectral absorption line of the characteristic absorption of the gas to be measured. The semiconductor smoke laser emits specific smoke laser Beam (can only be absorbed by the measured gas), when passing through the measured gas, the attenuation of the smoke laser intensity and the measured gas concentration have a certain function relationship for quantitative analysis. Tunable semiconductor smoke laser spectral absorption Technology (TDLAS) utilizes the tunability of the wavelength of the flue gas laser. The emission wavelength of the flue gas laser changes with the change of the operating temperature and current. By periodically modulating the current, the wavelength of the flue gas laser can be made within a small range. Periodic changes. In each cycle, the "single-line absorption spectrum" data of the measured gas and the spectral line data of background gas, dust and other interference factors can be obtained. In gas detection and concentration analysis, in order to improve detection sensitivity, generally Select the appropriate absorption spectrum line and the appropriate modulation parameters of the flue gas laser according to the site conditions.The following figure shows the original continuous analyzer of the flue gas laser detector. Fig.


Flue gas laser online monitoring analyzer system Product index:

 

 

 

Technical index

Optical channel length

Less than 20M

Response time

Less than 1S

Linear error

Less than 1% FS

Repeatability

Less than 1%

Span drift

半年 Less than 1% FS / half year

Maintenance cycle

/ , 清洁光学窗片 Less than 2 years / time , clean optical windows

Calibration period

/ Less than 2 times / year

Explosion-proof type

EcdllCT5

Protection class

IP66

 

 

Interface signals

Analog output

4-20MA( 隔离 , 最大负载 750 ) 2 way 4-20MA ( isolated , maximum load 750 ohms )

Analog input

4-20MA( 温度 , 压力补偿 ) 2 way 4-20MA ( temperature , pressure compensation )

Digital output

RS485 / RS232 / GPRS

Relay output

(24V.1A) 3 outputs (24V.1A)

 

Working conditions

power supply

 

Purge gas

, 净化仪表空气等 0.3MPA-0.8MPA industrial nitrogen , purification instrument air, etc.

Ambient temperature

-30-60 degrees

installation

Installation method

In-situ installation


Flue gas laser analyzer detector.Online continuous analyzer has small drift and good stability.Generally, the zero drift and volume drift meet less than 1% FS / half year. The instrument calibration cycle is long, reducing the workload of instrument calibration.
Flue gas laser online monitoring analyzer system Application of the product:
The SK6500 flue gas laser online monitoring analyzer system can be installed in situ. The installation pipe is directly smaller than 20MM and is used to connect the DN50 standard flange. In order to ensure the uniformity of the air flow in the installation pipe, the installation location must be selected on the straight pipe. Only the length of the pipe before the measurement point is at least 0.5 times (preferably 2 times) the diameter of the pipe.

The integrated flanges of the SK6500 smoke laser online monitoring analyzer system are installed at both ends of the smoke village road.In order to avoid dust, tar and other substances from contaminating the optical lens in the foreign gas, the purge gas is used to purge both the receiving end and the transmitting end. The side window, to prevent dust, particles, tar and other substances from contaminating the window, the schematic diagram of the purge unit is as follows:


The SK6500 flue gas online monitoring analyzer system is easy to install.It can be directly measured on both sides of the flue through the integrated flange, and the value of the measured gas content can be detected in real time. The on-site installation diagram is as follows. For some special occasions such as measuring NH3, The laser online monitoring analyzer system can also be installed diagonally.


Flue gas laser online monitoring analyzer system Technical advantages:
SK6500 smoke laser online monitoring analyzer system uses OLED screen display, low power consumption, wide viewing angle, superior low temperature performance, -40 degrees can be displayed normally. Key operation uses high-sensitivity Hall keys, which can respond quickly and easily to the magnetic pen In addition, SK6500 products also have the following features:
1) Unaffected by background gas

The spectral width of the semiconductor smoke laser used by TDLAS technology is 0.0001NM smaller, which is about 1/106 of the spectral width of the infrared light source, which is much smaller than the spectral width of the absorption line of the gas under test. Single absorption line (semiconductor smoke laser absorption spectroscopy technology is also called single line spectroscopy technology), so it successfully eliminates the influence of background gas cross interference. The schematic diagram of the smoke laser `` single line spectrum '' is as follows:


2) Free from dust and window pollution
The wavelength of a semiconductor flue gas laser can be scanned by modulating the working current, so that the flue gas laser ratio scans both the area with gas absorption and the area without gas absorption. However, when the wavelength is located in the absorption area, it can be measured that it contains gas. The total light transmittance T1 of the dust and window is the light transmittance TG = T1 / T2 when the wavelength is in the non-gas absorption region. The TDLAS technology corrects the influence of dust and window pollution on the measurement through the smoke laser wavelength scanning technology.
3) Automatic compensation of measured gas temperature and pressure
Changes in the temperature and pressure of the measured gas will cause changes in the intensity and broadening of the spectral line. If the annual or pressure signal is not modified, the accuracy of the measurement results will be affected. The TDLAS technology analyzes the single absorption spectrum of the measured gas. Therefore, it is easier to correct the effects of temperature and pressure. For this purpose, the instrument has built-in temperature and pressure correction functions, which can automatically correct the gas component measurement value based on the actual measured temperature and pressure of the measured gas, so that accurate re-measurement can be achieved. Line gas analysis.
Flue gas laser online monitoring analyzer system typical application:
O2, CO and other gas concentrations in steel metallurgy;
Take there, CO, gas detection in industries such as cement, environmental protection;
Trace HCI and HF analysis in environmental protection, chemical and other industries;
CO2 detection gas in coal chemical, environmental protection, medical and other industries;
FCC smoke detection analysis;
Torch Seven Analysis;
Analysis of scorched flue gas from ethylene cracking furnace;
Refinery acid gas analysis;
Detection of trace gases in the chlorine industry;

Synthetic ammonia gas detection;


DLAS technology is essentially an absorption technology that obtains the concentration of the gas by analyzing the selective absorption of the flue gas laser by the gas. It differs from the traditional red spectral absorption technology in that the semiconductor flue gas laser has a spectral width much smaller than the gas absorption spectrum The width of the line.
1. Modulation spectrum detection technology
Modulation spectrum detection technology is the most widely used TDLAS that can obtain higher detection sensitivity. It quickly sweeps the flue gas laser frequency across the fixed frequency range of the absorption line of the measured gas, and then uses phase-sensitive detection technology measuring
After being absorbed by the gas, the spectral wave components in the transmission line are analyzed to analyze the absorption of the gas. There are two types of modulation schemes: external modulation and internal modulation. External modulation schemes use electro-optic modulators outside the semiconductor smoke laser to achieve light. Modulation of the frequency, the internal modulation scheme realizes the modulation of the flue gas laser frequency by directly changing the working current of the semiconductor smoke laser, such as the working current. Due to the convenience of use, the internal modulation scheme is more widely used, and the measurement principle is briefly described below .
While the flue gas laser frequency scans the gas absorption spectrum, the flue gas laser frequency is modulated with a higher frequency sinusoidally modulated working current of the flue gas laser.The instantaneous flue gas laser frequency can be expressed as in the formula, (1) represents the flue gas Low frequency scanning of the laser frequency; A is the amplitude of the frequency change caused by the sinusoidal modulation; W is the sinusoidal modulation frequency. The transmitted light intensity can be expressed in the form of a subordinate FOURIER. Series.
Harmonic components can be detected using a phase-sensitive detector (PSD). Modulation spectroscopy technology significantly reduces the influence of smoke laser light device noise (1 / F noise) on the measurement by high-frequency modulation, and can be set to a larger value by setting the PSD To obtain a very narrow bandwidth band-pass filter. This effectively compresses the noise bandwidth. Therefore, the modulation spectroscopy technique can obtain a good detection sensitivity.
3 technical characteristics and advantages: (1) not affected by background gas.
(2) Not affected by dust and window pollution.
(3) the effect of automatic correction of temperature and pressure on measurement
Flue gas laser on-line analyzer detectorOn-line continuous analyzer is used for continuous industrial process and gas emission measurement, suitable for harsh industrial environment applications, such as various combustion of steel, aluminum and non-ferrous metals, chemical industry, petrochemical, cement, power generation and Waste incineration, etc.
Flue gas laser online monitoring analyzer feature
High resolution (sweep gas laser scanning frequency is several times that of traditional analyzer detector online continuous analyzer)
Modular design, can be modularly replaced on site, fast maintenance and repair
High light penetration, suitable for high dust blocking environment applications
Aerodynamic principle insertion tube, suitable for ultra-high dust blocking environmental applications
No cross interference
No sampling required, direct measurement online
Fast measurement (response time can be less than 1 second)
Compact and durable
SK850 series flue gas laser online monitoring analyzer system is based on the principle of tunable semiconductor flue gas laser absorption spectroscopy (TDLAS) technology measurement. Product measurement accuracy is high, the measurement is not affected by background gas cross interference, fast response speed, high reliability, maintenance Short cycle and low maintenance cost are preferred by more and more customers. Due to its unique advantages, the flue gas laser online monitoring analyzer system can be used in situ in steel metallurgy, petrochemical, thermal power generation and waste incineration, etc. Real-time monitoring of O2, CO, CO2, H2S, HCL, HF, CH4, H2O, and NH3 gas concentrations.
Flue gas laser online monitoring analyzer system
Flue gas laser receiving unit
Flue gas laser emission unit
Flue gas laser online monitoring analyzer system working principle
可调谐半导体烟气激光光谱吸收技术(TDLAS)是利用烟气激光波长的可调谐性,烟气激光的发射波长随着工作温度和电流的变化而改变.通过对电流的周期性调制,可以使烟气激光波长在小范围内周期性变化,在每个周期内可以获得被测气体的”单线吸收谱线”数据和背景气体,粉尘等干扰因素的谱线数据.在气体检测与浓度分析中,为了提高探测灵敏度,一般会根据现场工况选择合适的吸收谱线和合适的烟气激光器调制参数,下图为烟气激光分析仪检测仪在线连续分析仪原理 SK850 series smoke laser online monitoring analyzer system is based on the principle of tunable semiconductor smoke laser absorption spectroscopy (TDLAS) technology to measure and obtain the spectral absorption line of the characteristic absorption of the gas to be measured. The semiconductor smoke laser emits a specific smoke laser beam ( (Can only be absorbed by the measured gas), when passing through the measured gas, the attenuation of the smoke laser intensity and the concentration of the measured gas have a certain function relationship for quantitative analysis. Tunable semiconductor smoke laser spectral absorption technology ( TDLAS) uses the tunability of the wavelength of the flue gas laser, and the emission wavelength of the flue gas laser changes with the change of the operating temperature and current. By periodically modulating the current, the flue gas laser wavelength can be periodically cycled in a small range In each cycle, the "single-line absorption spectrum" data of the measured gas and the spectral line data of background gas, dust and other interference factors can be obtained. In gas detection and concentration analysis, in order to improve the detection sensitivity, it is generally based on the scene Select the appropriate absorption spectrum and appropriate modulation parameters of the flue gas laser in the working conditions.The following figure shows the principle of the online continuous analyzer of the flue gas laser detector.
Flue gas laser online monitoring analyzer system Product index:
Technical index Optical channel length less than 20M
Response time is less than 1S
Linear error less than 1% FS
Repeatability less than 1%
Span drift less than 1% FS / half year
Maintenance cycle Less than 2 years / times, clean optical windows
Calibration cycle less than 2 times / year
Explosion-proof type EcdllCT5
Protection class IP66
Interface signal: Analog output: 2 4-20MA (isolated, maximum load: 750 Euro)
Analog input 2 4-20MA (temperature, pressure compensation)
Digital output RS485 / RS232 / GPRS
Relay output 3 outputs (24V.1A)
Working conditions
Purge gas 0.3MPA-0.8MPA industrial nitrogen, purification instrument air, etc.
Ambient temperature -30-60 degrees
Installation method
Flue gas laser analyzer detector.Online continuous analyzer has small drift and good stability.Generally, the zero drift and volume drift meet less than 1% FS / half year. The instrument calibration cycle is long, reducing the workload of instrument calibration.
Flue gas laser online monitoring analyzer system Application of the product:
The SK6500 flue gas laser online monitoring analyzer system can be installed in situ. The installation pipe is directly smaller than 20MM and is used to connect the DN50 standard flange. In order to ensure the uniformity of the air flow in the installation pipe, the installation location must be selected on the straight pipe. Only the length of the pipe before the measurement point is at least 0.5 times (preferably 2 times) the diameter of the pipe.
The integrated flanges of the SK6500 smoke laser online monitoring analyzer system are installed at both ends of the smoke village road.In order to avoid dust, tar and other substances from contaminating the optical lens in the foreign gas, the purge gas is used to purge both the receiving end and the transmitting end. The side window, to prevent dust, particles, tar and other substances from contaminating the window, the schematic diagram of the purge unit is as follows:
The SK6500 flue gas online monitoring analyzer system is easy to install.It can be directly measured on both sides of the flue through the integrated flange, and the value of the measured gas content can be detected in real time.The on-site installation diagram is as follows.For some special occasions such as measuring NH3, flue gas The laser online monitoring analyzer system can also be installed diagonally.
Technical advantages:
SK6500 smoke laser online monitoring analyzer system uses OLED screen display, low power consumption, wide viewing angle, superior low temperature performance, -40 degrees can be displayed normally. Key operation uses high-sensitivity Hall keys, which can respond quickly and easily to the magnetic pen In addition, SK6500 products also have the following features:
1) Unaffected by background gas
The spectral width of the semiconductor smoke laser used by TDLAS technology is 0.0001NM smaller, which is about 1/106 of the spectral width of the infrared light source, which is much smaller than the spectral width of the absorption gas line of the measured gas. The scanning range of the frequency modulation also includes only the measured gas. Single absorption line (semiconductor smoke laser absorption spectroscopy technology is also called single line spectroscopy technology), so it successfully eliminates the influence of background gas cross interference. The schematic diagram of the smoke laser `` single line spectrum '' is as follows:
2) Free from dust and window pollution
The wavelength of a semiconductor flue gas laser can be scanned by modulating the working current, so that the flue gas laser ratio scans both the area with gas absorption and the area without gas absorption. However, when the wavelength is located in the absorption area, it can be measured that it contains gas. The total light transmittance T1 of the dust and window is the light transmittance TG = T1 / T2 when the wavelength is in the non-gas absorption region. The TDLAS technology corrects the influence of dust and window pollution on the measurement through the smoke laser wavelength scanning technology.
3) Automatic compensation of measured gas temperature and pressure
Changes in the temperature and pressure of the measured gas will cause changes in the intensity and broadening of the spectral line. If the annual or pressure signal is not modified, the accuracy of the measurement results will be affected. The TDLAS technology analyzes the single absorption spectrum of the measured gas. Therefore, it is easier to correct the effects of temperature and pressure. For this purpose, the instrument has built-in temperature and pressure correction functions, which can automatically correct the gas component measurement value based on the actual measured temperature and pressure of the measured gas, so as to achieve accurate re- Line gas analysis.
typical application:
O2, CO and other gas concentrations in steel metallurgy;
Take there, CO, gas detection in industries such as cement, environmental protection;
Trace HCI and HF analysis in environmental protection, chemical and other industries;
CO2 detection gas in coal chemical, environmental protection, medical and other industries;
FCC smoke detection analysis;
Torch Seven Analysis;
Analysis of scorched flue gas from ethylene cracking furnace;
Refinery acid gas analysis;
Detection of trace gases in the chlorine industry;
Synthetic ammonia gas detection;
DLAS technology is essentially an absorption technology that obtains the concentration of the gas by analyzing the selective absorption of the flue gas laser by the gas. It differs from the traditional red spectral absorption technology in that the semiconductor flue gas laser has a spectral width much smaller than the gas absorption spectrum The width of the line.
1. Modulation spectrum detection technology
Modulation spectrum detection technology is the most widely used TDLAS that can obtain higher detection sensitivity. It quickly sweeps the flue gas laser frequency across the fixed frequency range of the absorption line of the measured gas, and then uses phase-sensitive detection technology measuring
After being absorbed by the gas, the spectral wave components in the transmission line are analyzed to analyze the absorption of the gas. There are two types of modulation schemes: external modulation and internal modulation. External modulation schemes use electro-optic modulators outside the semiconductor smoke laser to achieve light. Modulation of the frequency, the internal modulation scheme realizes the modulation of the flue gas laser frequency by directly changing the working current of the semiconductor smoke laser, such as the working current. Due to the convenience of use, the internal modulation scheme is more widely used, and the measurement principle is briefly described below .
While the flue gas laser frequency scans the gas absorption spectrum, the flue gas laser frequency is modulated with a higher frequency sinusoidally modulated working current of the flue gas laser.The instantaneous flue gas laser frequency can be expressed as in the formula, (1) represents the flue gas Low frequency scanning of the laser frequency; A is the amplitude of the frequency change caused by the sinusoidal modulation; W is the sinusoidal modulation frequency. The transmitted light intensity can be expressed in the form of a subordinate FOURIER. Series.
Harmonic components can be detected using a phase-sensitive detector (PSD). Modulation spectroscopy technology significantly reduces the influence of smoke laser light device noise (1 / F noise) on the measurement by high-frequency modulation, and can be set to a larger value by setting the PSD To obtain a very narrow bandwidth band-pass filter. This effectively compresses the noise bandwidth. Therefore, the modulation spectroscopy technique can obtain a good detection sensitivity.
3 technical characteristics and advantages: (1) not affected by background gas.
(2) Not affected by dust and window pollution.
(3) the effect of automatic correction of temperature and pressure on measurement
Flue gas laser on-line analyzer detectorOn-line continuous analyzer is used for continuous industrial process and gas emission measurement, suitable for harsh industrial environment applications, such as various combustion of steel, aluminum and non-ferrous metals, chemical industry, petrochemical, cement, power generation and Waste incineration, etc.
Flue gas laser online monitoring analyzer system feature
High resolution (sweep gas laser scanning frequency is several times that of traditional analyzer detector online continuous analyzer)
Modular design, can be modularly replaced on site, fast maintenance and repair
High light penetration, suitable for high dust blocking environment applications
Aerodynamic principle insertion tube, suitable for ultra-high dust blocking environmental applications
No cross interference
No sampling required, direct measurement online
Fast measurement (response time can be less than 1 second)
Compact and durable
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