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Introduction
Minimum Ignition Temperature Testing Equipment is a way of testing
the sensitivity of the ignition that the dust cloud is in the
heated environment. When a lot of dust is exposed in heating the
air and the air temperature is high enough, it may lead to
spontaneous combustion. This method can test the minimum ignition
temperature of combustible dust cloud.
Standard:
Technical parameters:
1 | Furnace operating temperature range | Room temperature ~ 800 ºC. The operating temperature can rise to 1000 ºC to clean the test chamber |
2 | Temperature accuracy | ± 1% (higher than 500 ºC), ± 3% (lower than 300 ºC). |
3 | The pressure of the dispersion air chamber | 0 ~ 1 bar |
4 | The pressure accuracy of the air storage device | ± 5% |
5 | Size | 500X300X450 mm |
6 | Power supply | 230v / 50Hz or 110v / 60Hz |
Testing process
The Test is carried in Godbert-Greenwald furnace. The heating
furnace inlcudes the vertical quartz tubes . The hole is at the
bottom of the tube.The glass observing room is connected with
sample fixing device at the top of the quartz tubes. The compressed
air from the tank blows the dust into the heating furnace and the
sample fixing device ,and then exposed into the glass observing
room and the quartz tubes .the heating furnace is located on the
holder . And you can observe the ignition appearance from the
bottom of the furnace. The test begins from the 500ºC. If you
observe the ignition appearance ,you shall decrease the temperature
at the 10ºC,until the ignition does not appear.
Results description
When the ignition occurs , the lowest temperature is recorded as
the minimum ignition temperature of the dust cloud .
The minimum ignition temperature of the test data information is
used to determine whether the surface temperature of the equipment
can cause the automatic fire of the exposed dust . It is an
important standard to evaluate the selection of the equipment at
the condition of the dusty environment . When using the minimum
ignition temperature testing data ,you shall leave a safety limit
for the small-scale test .