EFFECT OF THERMAL SHOCK ON FABRIC PROPERTIES OF BAG FILTER MATERIALS FOR COAL-FIRED POWER PLANTS

GUO Erbao; LÜ Meiqun; LIU Xingcheng; RONG Nai

doi:10.13205/j.hjgc.202303011

Volume 41 Issue 3

Mar. 2023

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GUO Erbao, LÜ Meiqun, LIU Xingcheng, RONG Nai. EFFECT OF THERMAL SHOCK ON FABRIC PROPERTIES OF BAG FILTER MATERIALS FOR COAL-FIRED POWER PLANTS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(3): 84-89,102. doi: 10.13205/j.hjgc.202303011

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GUO Erbao, LÜ Meiqun, LIU Xingcheng, RONG Nai. EFFECT OF THERMAL SHOCK ON FABRIC PROPERTIES OF BAG FILTER MATERIALS FOR COAL-FIRED POWER PLANTS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(3): 84-89,102. doi: 10.13205/j.hjgc.202303011

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EFFECT OF THERMAL SHOCK ON FABRIC PROPERTIES OF BAG FILTER MATERIALS FOR COAL-FIRED POWER PLANTS

doi: 10.13205/j.hjgc.202303011

GUO Erbao^{1,2
,
,},
LÜ Meiqun^1,2,
LIU Xingcheng³,
RONG Nai^1,2

1. Advanced Technology Institute of Green Building Research of Anhui Province, Anhui Jianzhu University, Hefei 230601, China;
2. Key Laboratory of Indoor Thermal and Humid Environment, Anhui Jianzhu University, Hefei 230601, China;
3. CISDI Shanghai Engineering Co., Ltd, Shanghai 200940, China

Received Date: 2022-06-09
Available Online: 2023-05-26
Publish Date: 2023-03-01

Abstract

Abstract

In order to study the effect of thermal shock at different temperatures on properties of PPS and PTFE composite filter materials and their coated fabrics, the changes in heat shrinkage, characteristic pore size, pore size distribution and filtration performance of filter materials after 24 h of treatment were compared, under the temperature of 160, 180, 200 ℃. The results showed that latitude and longitude heat shrinkage rate increased with the increase in temperature. After lamination, the membrane played a certain protective role on the filter material, so the longitude and latitude heat shrinkage rate after the coating was lower than the longitude and latitude heat shrinkage rate, before the film was coated. Before the lamination, with the increase of temperature, the median pore size decreased first and then increased, the minimum pore size increased, and the minimum pore size increased to 12.08 μm at 200 ℃; after the lamination, with the increase of temperature, the median aperture and the minimum pore size were increased first and then decreased. Affected by the characteristic aperture and pore size distribution, the pore size distribution of the uncoated film was the most concentrated, mainly distributed between 12.54 μm and 13.25 μm, and its PM_2.5 classification filtration efficiency with a grain size of 0.7 to 2.5 μm was about 70%, higher than the filtration efficiency after heating in three groups. After lamination, the pore size distribution was most concentrated when heating at 200 ℃, the classification filtration efficiency was the highest, and the PM_2.5 classification filtration efficiency reached 80% above for the fine particulate matter with a grain size of 0.5 to 2.5 μm.
- thermal shock,
- thermal shrinkage rate,
- pore size distribution,
- characteristic pore size,
- filtration performance

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References(21)

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