| 1. 1. Flue gas flow control system |
| Index | Item | Technical indicators and parameters |
| 1.1 | Fume hood | Installed directly above the opening of the combustion test
chamber, 1.8~2.0 meters above the ground, the bottom size is
2440*2440mm, the height is 1000mm, and the material is SS304； |
| 1.2 | Flue gas homomixer | Installation and the cone-shaped smoke collecting hood directly
above, the size is 900*900*900mm, two 900*500 stainless steel
plates are installed inside, and one side is opened with a φ400
opening to connect to the pipe, the material is SS304； |
| 1.3 | Smoke exhaust pipe | φ is 400mm, length 5000mm, composed of several sections, connected
by flange and high temperature resistant sealing ring, both ends
are installed with flue gas mixing device, material is SS304; |
| 1.4 | Exhaust fan | Centrifugal exhaust fan, the inner tank is made of stainless steel,
can withstand high temperature flue gas not less than 300℃, and the
air volume is steplessly adjusted by the frequency converter； |
| The smoke exhaust system is sufficient for all the smoke produced
by the mobile phone combustion test, and the smoke exhaust capacity
is not less than 8000m³/h; |
| 2. 2. Comprehensive measurement section |
| 2.1 | Comprehensive Measurement section | A stainless steel pipe section with a length of 2155mm and a
diameter of 400mm, made of SS304, equipped with pressure,
temperature, light path, sampling and other sensors； |
| 2.2 | Pressure sensing device | Two-way probe, made of stainless steel, installed in the center of
the pipeline, the front and back chambers are connected with the
pressure difference sensor through the PTFE tube to detect the
pressure difference in the pipeline； |
| The differential pressure sensor is installed on the bracket of the
comprehensive measurement section to ensure that the differential
pressure reading has a short delay and no loss, and the T90
response time is less than 3 seconds |
| Pressure sensor, range is 0-2000Pa, accuracy ±5Pa; |
| 2.3 | Temperature sensing device | Adopt American Omega thermocouple, diameter 0.5mm, armored
insulation type K thermocouple that meets IEC requirements; |
| Range 0-1000℃, accuracy 0.1℃; |
| 2.4 | Optical path measuring device | The optical attenuation system is an incandescent light type |
| 2.5 | Sample gas collection device | The lamp is an incandescent lamp and used at a color temperature of
(2900±100)K. The power supply is a stable direct current |
| 3. Gas and its control system |
| 3.1 | Burner | Detector and imported silicon photodiode probe |
| The optical attenuation system is an incandescent light type |
| The lamp is an incandescent lamp and used at a color temperature of
(2900±100)K. The power supply is a stable direct current |
| 3.2 | Ignition device | The lens system is used to condense the light into a parallel beam
with a diameter of at least 20mm. The light-emitting hole of the
photocell should be located at the focal point of the lens in front
of it |
| Detector and imported silicon photodiode probe |
| The optical attenuation system is an incandescent light type |
| 3.3 | Combustion head gas flow control | The lamp is an incandescent lamp and used at a color temperature of
(2900±100)K. The power supply is a stable direct current |
| The lens system is used to condense the light into a parallel beam
with a diameter of at least 20mm. The light-emitting hole of the
photocell should be located at the focal point of the lens in front
of it |
| Detector and imported silicon photodiode probe |
| 3.4 | Calibrated sand burner | The optical attenuation system is an incandescent light type |
| The lamp is an incandescent lamp and used at a color temperature of
(2900±100)K. The power supply is a stable direct current |
| 3.5 | Calibrated gas flow control | Using American Alicat mass flowmeter, the medium is propane, the
range is 0-7g/s, the accuracy is ±(0.8%rdg+0.2%F.S.), the response
time is 0.1s, and the maximum calibration flame is 300kw; |
| The calibration gas flow is controlled by software, which can
automatically control the stepped calibration flame source with
75kw/160kw output; |
| 3.6 | Control System | Omron PLC is used to control the gas flow, equipped with a gas
cut-off device, which is safe and reliable; |
| Separate configuration of gas control box, safe and convenient for
operation and maintenance; |
| 4. 4. Flue gas treatment system |
| 4.1 | Flue gas filtration | Equipped with a three-stage filter device, long-term filtration of
dust in the flue gas: First grade glass fiber cotton coarse filter, filter large
particles of carbides in the flue gas, and the filter material can
be quickly replaced; The second grade American Parker filter, the filter element is
PTFE, the precision is 2μm, the filter element Can be quickly
disassembled and replaced; Three-stage PTFE membrane filtration, with an accuracy of 0.5μm,
effectively cut off moisture; |
| 4.2 | Cold trap | Compression pump type cold trap, cooling capacity 320KJ/h,
temperature control accuracy 0.1℃, static change 0.1K,
self-starting and maintenance-free; |
| 4.3 | Steam trap | Automatically drain the cooling water generated by the cold trap,
free of maintenance； |
| 4.4 | Drying column | Used to dry the residual water vapor in the sample gas, it can be
quickly disassembled and replaced with the drying medium; |
| 4.5 | Sampling pump | German KNF vacuum sampling pump, with a sampling capacity of
16L/min, can continuously output a sampling pressure of 50KPa, with
high air tightness, low noise and low vibration; |
| 4.6 | Rotameter | Imported rotameter with a range of 0-1.5L/min, which can stabilize
the output sample gas flow and reduce the measurement error caused
by the fluctuation of the gas flow; |
| 5. Gas concentration analysis system |
| 5.1 | Gas analyzer | Using German ABB EL3020 analyzer, paramagnetic O2 concentration
analysis, measurement range 0-21%, accuracy 0.01%, response time no
more than 12s, drift and noise within 30min of the analyzer no more
than 100ppm; Linear deviation: ≤1%F.S.; Repeatability: ≤0.5F.S.; Zero floating rain: ≤1%F.S./7D; Starting time: ≤30min; |
| Using German ABB EL3020 analyzer, IR type CO/CO2 concentration
analysis, measuring range CO: 0-1%, accuracy 0.01%, CO2: 0-10%,
accuracy 0.01%, and the response time does not exceed 12s. |
| 6. Data Acquisition System |
| 6.1 | Acquisition module | Using Advantech acquisition module, The gas concentration collection accuracy is 100×10-6; The temperature collection accuracy is 0.1℃; The pressure difference collection accuracy is 0.1Pa; The time acquisition accuracy is 0.1s; Other signals are 0.1% of the full-scale output value; |
| 6.2 | data collection | The system records and stores the following data at least every 3s: The pressure difference of the bidirectional probe, Pa;pipe
Temperature, K; O2 concentration, %; CO concentration, %; CO2 concentration, %; Mass flow rate of propane, mg/s; Time, s; |
| 7. Standard operating software |
| The standard operating software includes the following functions: |
| 7.1 | System status monitoring | Read the status and signal value of each sensor in the system; |
| 7.2 | Sensor calibration | Sensor calibration for temperature, wind pressure, light path,
concentration analysis, etc.; |
| 7.3 | System calibration | Standard system step calibration procedure; |
| 7.4 | Standard operating procedure | Standard test operating procedures; |
| 7.5 | Report review | Raw data access and export test report； |
| 7. Other auxiliary equipment |
| 7.1 | VCR | Video of admission test; |
| 7.2 | Rally | Used to confirm the force exerted by the main combustion head on
the surface of the mattress; |
| 7.3 | PC Computer | AdvanTech industrial computer and integrated data acquisition
interface improve the stability of system operation. |
