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Filter material filterability tester one, the use of filter material filtration performance tester is a kind of physical performance testing instrument used in the field of environmental science and technology and resource science and technology, mainly before the bidding of cloth bags and electric bags and put into production, the filter material is tested
for ash cleaning cycle, residual resistance, dust capture efficiency and other properties.
It can evaluate the dynamic and static dust removal efficiency and filtration performance of the filter material, quickly obtain the performance evaluation parameters of the filter material by simulating the real situation of the filter material in the actual use process, and accurately evaluate the quality, performance and life of the filter material
.
Second, the test principle: 1.
The air is first sent into the vertical dusty pipe to produce a dirty air flow
full of dust.
The dust is dispersed with the compressed air in the dust generator, and after forming a concentration, it evenly distributes the entire vertical pipeline and flows downward, and partially reaches the horizontal pipeline with the suction air flow through the tested filter material, exposing it to a constant air flow and dust concentration to simulate the operation
of the cleanable filter material.
2.
The dust forms a powder, resulting in an increase in pressure drop, and the differential pressure sensor detects the change of pressure drop before and after the
tested filter material in real time.
Once the pressure drop reaches a preset value, the system releases a pulse of clean compressed air towards the powder generated on the dirty side, and blows back to clean the ash without affecting the
airflow.
3
.
The tested filter material re-filters the dust, and so on.
The cleaning pulse must be time-accurate and highly repeatable, so that the pressure surface of each time the filter material is applied
.
4
.
The removed powder and remaining dust fall down to the dust collector at the bottom of the dirty trachea with the vertical air flow.
Equipped with a dirty gas filter, so that the dust will not be redistributed upstream of the dirty gas of the filter material under test, resulting in an unclear dust concentration, making the measurement invalid (especially important parameters: residual pressure drop value); This design enables error-free long-term operation without the need for frequent and complete interruptions in measurements due to dust deposits
.
Third, the implementation of standards applicable standards: VDI/DIN 3926 standard test method for evaluating cleanable filter media GB/T 6719 baghouse technical requirements ISO 11057 Air quality – Test method for the filtration performance of cleanable filter media ASTM D6830 Test method for determining the pressure drop and filtration performance of cleanable filter media JISZ 8909-1 Test method for filter media for dust collection.
1 Part 1: Filtration efficiency Fourth, technical parameters 1.
Export dust concentration; 2.
Test for changes in filter quality; 3.
Initial residual pressure drop, average residual pressure drop, Residual pressure drop increment 4.
Average filtration cycle; 5.
Dust removal efficiency, penetration rate; 6.
Ash cleaning time, ash cleaning cycle; 7.
Static dust removal efficiency; 8.
Dynamic dust removal efficiency; 9.
PLC control system; 10.
Equipped with a computer and touch screen switching operation; 11, imported suction pump; 12, standard PM2.
5 filter device; 13, high-quality flow controller; 14, automatic conveying of materials; 15, vertical device stainless steel production; 16, horizontal device LV production, surface rust prevention spray treatment; 17, concentration sensor; 18, dust collection box