The collector has a tube sheet that is located near the top of the vertical casing, and the bags hang from the holes in the tube sheet. A wire-mesh cage is located inside the bags to keep them from collapsing. The contaminated gas stream enters through the side or through the hopper of the collector and flows into the bags and up through the tube sheet, leaving the dust cake on the outside of the bags.
Cleaning is accomplished by directing the compressed air pulse to one or a few rows of bags, while the other bags continue to provide filtration. The collector is usually not shut down or isolated from flow while cleaning.
The dust cake dislodged by the compressed air pulse falls into the hopper and is removed from the collector. Fabric filter performance can be effected by the conditions that the fabric is exposed to and the frequency of cleaning. Minimum operating temperature is especially important where acid gases are expected to be present in the gas stream. Lower temperatures mean acid gases have the potential to condense and corrode the fabric filter casing and other metal parts.
Condensation can also cause bag blinding, which blocks air flow through the bag. Fabric filters are also susceptible to damage caused by high temperatures. For more information, see the box More About Fabric Filters. The best indicators of fabric filter performance is the particulate matter outlet concentration, which can be measured with a particulate matter continuous emissions monitoring system CEMS or a bag leak detection system used to monitor bag breakage and leakage.
Opacity monitoring is also an indicator of fabric filter performance. Other indicators of performance include pressure differential, inlet temperature, temperature differential, exhaust gas flow rate, cleaning mechanism operation and fan current.
Specific tools have been developed to estimate fabric filter costs when used to control particulate matter from coal-fired power plants and coal-fired utility boilers.
As indicated above in the monitoring section, indicators of fabric filter performance include the particulate matter outlet concentration, which can be measured with a particulate matter CEMS. Typical Shaker Baghouse. For ease in identifying the level of efficiency being purchased, a color coding system is used. When requesting a quote for bag filters, We need to know your desired efficiency and of pockets.
You can also add loops to your order. Skip to content. Moline, IL Facebook page opens in new window Linkedin page opens in new window. Bag Filter. A Pulse Jet type Bag Filter consists of a Four-sided hollow metallic body which is conical at the downside. Also, a vertical squirrel cage type arrangement is there for supporting and holding the filter bags.
These squirrel type cages are covered by filter bag material. After covering these cages with Filter Bags , it appears as a Pipe like geometry Downside of this cage is blind while the other side is open for the flue gases exit and pressurized air inlet. During the operation of a Steam Boiler , the flue gases leaving the Boiler enters the Bag filter body. Now, these flue gases come in contact with the outer surface of the Filter bags pipe-like.
As the ID Fan creates a continuous suction effect, these flue gases try to enter the cage. So the, bigger size dust particles get collected at the surface of the Filter and flue gases leaves Bag filter through the outlet.
Now, these dust particles which are attached to the surface of the Filter Bag are separated by the Pressurized air supplied by the Pulse Jet system installed at the top of the Bag Filter.
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