- Flue gas flow controller system
|
| Index | item | Technical and specification |
| 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 equalization 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 generated
by the mobile phone combustion test, and the smoke exhaust capacity
is not less than 8000m³/h; |
| 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, is equipped with sensors such as
pressure, temperature, light path, and sampling; |
| 2.2 | Pressure sensing device | The two-way probe, made of stainless steel, is installed in the
center of the pipeline, and the front and back chambers are
connected to 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, which
is installed on the comprehensive measurement section with a
flexible connector and includes the following devices: The lamp is
an incandescent lamp and used at a color temperature of
(2900±100)K. The power supply is a stable direct current, and the
current fluctuation range is within ±0.5% (Including temperature,
short-term and long-term stability); 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, and its diameter (d) should depend on the focal length (f)
of the lens so that d/f is less than 0.04; Detector and imported silicon photodiode probe, photodetection
chamber has 0.1% linear stability, 10-bit measurement range, the
spectral distribution responsivity of silicon photodiode is
consistent with CIE (illumination curve), and the standard function
V(γ) can reach At least ±5% accuracy; The 90% response time of the optical attenuation system does not
exceed 3s; |
| 2.5 | Sample gas collection device | The tube piercing test sampling tube, made of SS304, has a
detachable design to facilitate the removal of carbides accumulated
in the sampling tube and reduce system delay time |
| 2. Gas and its control system |
| 3.1 | Burner | The special T-burner for mattress burning is composed of main and
side burners. It is installed on a mobile trolley and equipped with
standard weights and feet. The height of the T-burner head is
adjustable and the material is SS304; |
| 3.2 | Ignition device | Long open flame ignition method is adopted, remote ignition is
possible, safe and the ignition success rate is not less than 99%； |
| The main and side combustion heads are equipped with a long open
flame ignition device, and the device is equipped with a gas supply
pipe separately, which does not affect the flow of the combustion
head and can be individually adjusted through a needle valve； |
| Equipped with a spark ignition device to ignite a long open flame,
without manual ignition, safe and remote control; |
| 3.3 | Combustion head gas flow control | The main and side burners are respectively equipped with mass flow
meters to control the propane flow； |
| Adopt American Alicat mass flowmeter, medium is propane, range
0-450mg/s, accuracy ±(0.8%rdg+0.2%F.S.), response time 0.1s; |
| The gas flow is controlled by software, and the flame time is
automatically controlled； |
| 3.4 | Calibrated sand burner | Calibrated sand burner |
| Equipped with long open flame ignition device and electric spark
ignition device, remote ignition is possible, safe and high success
rate; |
| 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
output 75kw/160kw； |
| 3.6 | Control System | Use Omron PLC to control the gas flow, equipped with a gas cut-off
device, safe and reliable; |
| Separate configuration of gas control box, safe and convenient for
operation and maintenance； |
- Flue gas processing 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-class American Parker filter, the filter element is
PTFE, the precision is 2μm, and the filter element can be quickly
removed 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; |
| 3. Gas concentration analysis system |
| 5.1 | Gas analyzer (Servomex) | Imported O2 analyzer, paramagnetic O2 concentration analysis,
measurement range 0-21%, accuracy 0.01%, response time no more than
12s, analyzer drift and noise no more than 100ppm within 30min; Linear deviation: ≤1%F.S.; Repeatability: ≤0.5F.S. Zero floating rain: ≤1%F.S./7D; Starting time: ≤30min; |
| Imported CO/CO2 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. |
| 3. 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 | 16CFR1633 Standard system step calibration procedure |
| 7.4 | Standard operating procedure | 16CFR1633 standard operation procedure |
| 7.5 | Report review | Raw data access and export test report |
| 7. Other auxiliary equipment |
| 7.1 | Sample test framework | Welded by 38mm steel angle iron, the size is 1900*990*115mm |
| 7.2 | Location tooling 1 | Used to confirm the vertical position of the mattress and the test
frame, the material is SS304 |
| 7.3 | Location tooling 2 | Used to confirm the distance between the combustion head and the
mattress, made of aluminum alloy |
| 7.4 | VCR | Video of admission test |
| 7.5 | Pull force scale | Used to confirm the force exerted by the main combustion head on
the surface of the mattress |
| 7.6 | Desktop PC | AdvanTech industrial computer and integrated data acquisition
interface improve the stability of system operation. |
