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How does a bag filter handle special dust and what are the methods-Novo Environmental Protection Equipment

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How does the bag filter deal with special dust and what are the methods

Source: Novo environmental protection equipmentRelease time: 2019/6/3 8:38:38
袋式除尘器怎么处理特殊粉尘,方法有哪些
It is relatively difficult for the bag filter to deal with special nature dust, and corresponding measures need to be taken:
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How to deal with special dust with bag filter
It is relatively difficult for the bag filter to deal with special nature dust, and corresponding measures need to be taken:
1. Dust gas containing tar mist
It is difficult to handle the gas containing only tar mist, but it can be directly filtered when the oil mist in the gas is not large and the dust content is quite large. For example, in the asphalt concrete plant, the smoke from the stone dryer is the main source, plus the dust from the conveyor and other exhaust gases enter the equipment, in addition. At the mixer and unload the finished product. The tar mist generated by the heated asphalt concrete also entered the equipment. In this case, the amount of dust accumulated on the filter cloth far exceeds the amount of oil mist, which can prevent the trouble of oil mist sticking and ensure stable operation.
In the production of electrodes, molded carbon products, etc., tar mist is also generated in the process of mixing powder into the thermal binder. At this time, if it mainly deals with the dust generated during crushing and transportation, it can be used only when a part of the tar mist is mixed. However, if there is more tar in the flue gas in the coke tank on the tail tar furnace, a suitable amount of coke powder should be added before the flue gas enters to adsorb the coke fog, and a satisfactory result can be obtained.
If the gas contains only a small amount of oil mist, it can be treated separately. That is, adding an appropriate amount of powder to the pipeline as a filter aid can be used. After the added dust absorbs the tar mist, it should be returned to the manufacturing process and used as much as possible.
2. High dust concentration gas
When dealing with gas with high dust concentration, cyclone dust collector or gravity dust removal equipment can be installed as pre-dust, but this will increase the resistance of the system and increase the power consumption. Therefore, when the classification of dust or finished materials is not required, most of them use bag dust removal equipment directly.
Not all bag dust removal equipment can handle gas with high dust concentration. Only bag- type dust removal equipment with a wide separation between the filter bags and a continuous dust removal device in the form of a filter on the outside of the bag is suitable for processing gases with a high dust concentration.
When dealing with high dust content, the structure should try to make the dust fall directly into the ash bucket or add some baffles to reduce the amount of dust attached to the filter bag; prevent the friction damage of the filter cloth, and do not make the dust moving at high speed Direct impact filter cloth.
It is also possible to use a part of the middle of the box as a pre- dust collector , and also serve as a dynamic sedimentation chamber for dust and a shunt chamber for inlet gas.
Although the bag type dust collector used for pneumatic conveying device to collect dust, although it has less air volume, high dust concentration, and the cabinet requires pressure resistance, it is more cylindrical. Qualified enterprises can replace bag-type dust collectors with plastic burner dust collectors .
The inlet of the cylindrical box is made in a tangential direction, so that it has a separation function. Many rotary back-blow bag type dust collectors are in this form. Sometimes the ash bucket is made into the form of a cyclone dust collector . The bag type dust collector of the pneumatic conveying system, because of the large amount of powder, the ash bucket volume and the diameter of the ash outlet must be designed to be larger, and the capacity of the dust discharge device must be left with sufficient room to prevent the powder from being trapped in the ash bucket. material
3. Hygroscopicity and deliquescent dust

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