Air-To-Cloth Ratio
The selection of filter cloth and cloth area is largely based on experience. If you have a very common application the selection is easy. Experienced filter bag suppliers will know what to offer. They will be conservative when the situation is uncommon and complicated.
There are very many variables to consider and no reliable theroretical methods.
Best to ask a filter bag supplier.
Michael Reid. ■
Air-To-Cloth Ratio
The selection of filter cloth and cloth area is largely based on experience. If you have a very common application the selection is easy. Experienced filter bag suppliers will know what to offer. They will be conservative when the situation is uncommon and complicated.
There are very many variables to consider and no reliable theroretical methods.
Best to ask a filter bag supplier.
Michael Reid. ■
A/C Ratio
MaterialLimestoneRaw mealClinkerCoalGypsumCement
A/C ratio (m3/min/m2)1.21.21.21.01.51.5
•The needle felt filter cloth should be made from high quality polyester fibres for standard applications and, from polyacrylnitrile fibres for applications handling moisture. The specific weight of the cloth shall be above 550 gm/m2. ■
A/C Ratio
MaterialLimestoneRaw mealClinkerCoalGypsumCement
A/C ratio (m3/min/m2)1.21.21.21.01.51.5
•The needle felt filter cloth should be made from high quality polyester fibres for standard applications and, from polyacrylnitrile fibres for applications handling moisture. The specific weight of the cloth shall be above 550 gm/m2. ■
Re: Air To Cloth Ratio
for limestone with air flow (9,000 m3/h)
From your experience, what is the right A/C? ■
Re: Air To Cloth Ratio
for limestone with air flow (9,000 m3/h)
From your experience, what is the right A/C? ■
Acr
Client / boss are always Right.
There is no technical reason of selecting low ACR, which could even go up to 1.5.
Client may have following in his mind:
Not disclosing his actual requirement, he may use for coal occasionally with same set of equipment.
Environment is very dusty, may avoid frequent change of bags or allow BF to run with damage bags.
Similar bags were in their stock.
Some person have tendency to prove other wrong and enjoy on purchaser (owner of plant) cost to buy bigger machines to avoid maintance work.
Regards ■
Acr
Client / boss are always Right.
There is no technical reason of selecting low ACR, which could even go up to 1.5.
Client may have following in his mind:
Not disclosing his actual requirement, he may use for coal occasionally with same set of equipment.
Environment is very dusty, may avoid frequent change of bags or allow BF to run with damage bags.
Similar bags were in their stock.
Some person have tendency to prove other wrong and enjoy on purchaser (owner of plant) cost to buy bigger machines to avoid maintance work.
Regards ■
Re: Air To Cloth Ratio
Hi all,
what I think, lower A/C ratio, it is ok since enough filter area. This will increase the capital cost. However, how about the bag filter life? For my perception without proof yet, the life should be longer and save maintenance cost.
Let's move on the optimum A/C ratio, I understand it is based on many trail and experience. But could I know how to determine the best or better ratio?
Let say for cement is 1.2, how it is better than 1.5?
Haha. Thank you anyone can answer me and take me for more understanding
Cheers. Calvin ■
Re: Air To Cloth Ratio
Hi all,
what I think, lower A/C ratio, it is ok since enough filter area. This will increase the capital cost. However, how about the bag filter life? For my perception without proof yet, the life should be longer and save maintenance cost.
Let's move on the optimum A/C ratio, I understand it is based on many trail and experience. But could I know how to determine the best or better ratio?
Let say for cement is 1.2, how it is better than 1.5?
Haha. Thank you anyone can answer me and take me for more understanding
Cheers. Calvin ■
Air-To-Cloth Ratio For Fly Ash
Fly ash is from power plant.
Fly ash might or might not be grinded.
I want to ask how is A/C ratio affected by the size of fly ash?
And What A/C ratio is recommended for raw fly ash without grinding?
Thank you
Calvin - Process engineer from Cement plant ■
Air-To-Cloth Ratio For Fly Ash
Fly ash is from power plant.
Fly ash might or might not be grinded.
I want to ask how is A/C ratio affected by the size of fly ash?
And What A/C ratio is recommended for raw fly ash without grinding?
Thank you
Calvin - Process engineer from Cement plant ■
Air To Cloth Ratio
HI CAVIN,
YOU ARE RIGHT. LET ME EXPLAIN THIS TO SOME EXTEND. WHEN YOU USE LOWER A/C RATIO, PROBABLY THE NUMBER OF BAGS WILL BE MORE AND THE QUANTITY OF AIR AND DUST HANDLED BY EACH SQ MTR AREA OF BAG WILL BE LESS. SO THE BAG LIFE WILL BE EXTENDED SUBSTANTIALLY BECAUSE LESS MAINTENANCE ACTIVITIES FOR SATISFACTORY PERFORMANCE OF BAG FILTERS. IF THE FOLLOWING SITUATION ARISES, LOW A/C RATION PLAY SIGNIFICANT ROLE IN DESIGNING AND SELECTION OF BAGS AND THEIR NUMBERS.
1. 11000 CMH AIR VOLUME WITH 1500 mg/Nm3 and
2. 11000 CMH AIR VOLUME WITH 500 mg/Nm3 irrespective of any medium
Regards
S. CHANDRAKANTHAN
Originally Posted by Calvin.wck
what I think, lower A/C ratio, it is ok since enough filter area. This will increase the capital cost. However, how about the bag filter life? For my perception without proof yet, the life should be longer and save maintenance cost.
Let's move on the optimum A/C ratio, I understand it is based on many trail and experience. But could I know how to determine the best or better ratio?
Let say for cement is 1.2, how it is better than 1.5?
Haha. Thank you anyone can answer me and take me for more understanding
Cheers. Calvin
■
Air To Cloth Ratio
HI CAVIN,
YOU ARE RIGHT. LET ME EXPLAIN THIS TO SOME EXTEND. WHEN YOU USE LOWER A/C RATIO, PROBABLY THE NUMBER OF BAGS WILL BE MORE AND THE QUANTITY OF AIR AND DUST HANDLED BY EACH SQ MTR AREA OF BAG WILL BE LESS. SO THE BAG LIFE WILL BE EXTENDED SUBSTANTIALLY BECAUSE LESS MAINTENANCE ACTIVITIES FOR SATISFACTORY PERFORMANCE OF BAG FILTERS. IF THE FOLLOWING SITUATION ARISES, LOW A/C RATION PLAY SIGNIFICANT ROLE IN DESIGNING AND SELECTION OF BAGS AND THEIR NUMBERS.
1. 11000 CMH AIR VOLUME WITH 1500 mg/Nm3 and
2. 11000 CMH AIR VOLUME WITH 500 mg/Nm3 irrespective of any medium
Regards
S. CHANDRAKANTHAN
Originally Posted by Calvin.wckwhat I think, lower A/C ratio, it is ok since enough filter area. This will increase the capital cost. However, how about the bag filter life? For my perception without proof yet, the life should be longer and save maintenance cost.
Let's move on the optimum A/C ratio, I understand it is based on many trail and experience. But could I know how to determine the best or better ratio?
Let say for cement is 1.2, how it is better than 1.5?
Haha. Thank you anyone can answer me and take me for more understanding
Cheers. Calvin
■
Re: Air To Cloth Ratio
Dudes,
We deal with concrete ingredients like cement flyash silica fume sand and rock. I've found that A/C ratio is not that important. 7:1 is high and you'll get premature blinding but your dust collector probably will fail due to localized high airspeeds and/or high can velocity.
Take care to understand can velocity, A/C ratio and the reverse pulse. these all work together, people talk A/C alot because most bag houses have the same geometery and more cloth usually means bigger baghouse.
Word ■
Re: Air To Cloth Ratio
Dudes,
We deal with concrete ingredients like cement flyash silica fume sand and rock. I've found that A/C ratio is not that important. 7:1 is high and you'll get premature blinding but your dust collector probably will fail due to localized high airspeeds and/or high can velocity.
Take care to understand can velocity, A/C ratio and the reverse pulse. these all work together, people talk A/C alot because most bag houses have the same geometery and more cloth usually means bigger baghouse.
Word ■
Air To Cloth Ratio
In general, the lower the ratio, the better performance, and the longer filter life you will get. While there are certain conditions that lead to you needing to change the standard around a bit, in general for a pulse jet, you really should be somewhere around 6:1.
We have an article on our site that provides a nice overview of this topics: http://www.qfilter.com/res/The-Encyc...tion/detail/15 ■
Air To Cloth Ratio
In general, the lower the ratio, the better performance, and the longer filter life you will get. While there are certain conditions that lead to you needing to change the standard around a bit, in general for a pulse jet, you really should be somewhere around 6:1.
We have an article on our site that provides a nice overview of this topics: http://www.qfilter.com/res/The-Encyc...tion/detail/15 ■
Air To Cloth
There are a couple of key factors when sizing your collector. air to cloth is one of them. Please dont ever go up to 7:1 or your client will hate you in the end for wasting all his money. Also noted earlier but not clearly defined, can velocity is also important. Cartridge filters are gaining in popularity but in the end over the life of your equipment capital cost does not represent such a large part of your overall cost and you are probably better off with bags ■
Air To Cloth
There are a couple of key factors when sizing your collector. air to cloth is one of them. Please dont ever go up to 7:1 or your client will hate you in the end for wasting all his money. Also noted earlier but not clearly defined, can velocity is also important. Cartridge filters are gaining in popularity but in the end over the life of your equipment capital cost does not represent such a large part of your overall cost and you are probably better off with bags ■
Air To Cloth Ratio
I am looking for some solid information regarding sizing the filtration area of a dust filter (jet pulse, bag).
Formula or table i look for should take into consideration the application, temperature, dust size, dust material and any other relavent information.
Thanks
Eran (Israel) ■