How much filtration wind speed should be selected when selecting a boiler dust collector?
Choosing the filtration wind speed correctly not only plays an important role in emission standards, but also has extremely important economic significance in improving the equipment’s ability to handle dusty gases, reducing equipment investment and thus reducing project costs. . So, how to correctly select the filtration wind speed of the boiler dust collector?
The impact of wind speed on equipment: When the filtration wind speed is high, the filtration area and volume can be reduced, the floor space can be reduced, and the investment can be reduced. However, choosing a high filtration wind speed will affect the dust removal efficiency, increase the difficulty of dust cleaning, increase the filtration resistance, reduce the service life of the dust removal filter bag, and bring about increased operation and maintenance costs. In fact, selecting wind speed is a more complicated task. It is not enough to look at the above advantages and disadvantages in isolation. Solving this problem is the most important thing. Problems with wind speed on dust removal accessories: In recent years, as environmental protection requirements have become increasingly stringent, it has become very important to reasonably select the filtration wind speed of the dust collector when designing bag dust removal equipment.
What is the filtration wind speed of the boiler dust collector? According to experience, the filtration wind speed of the boiler dust collector should be selected below 0.8m/min to ensure normal dust removal effect. Because the flue dust temperature is relatively high for coal-fired boiler dust removal, high-temperature bag dust collectors are mostly chosen. Since it is a high-temperature bag dust collector, the dust bag must also use high-temperature filter materials. The weight of high-temperature filter material is generally about 850 grams, which is much thicker than normal temperature dust bag filter material, so the corresponding air permeability is reduced. When selecting the internal filtration wind speed of the dust collector, it should also be reduced as much as possible. Only when it is down can the normal operation of the dust collector equipment be guaranteed.
The internal filtration wind speed of the high-temperature bag dust collector should be controlled at 0.8m/min. If the emission standards are too high, the internal filtration wind speed of the dust collector should be controlled at 0.6m/min. The filtration wind speed in the dust collector selected according to different emission standards is different, and of course the filtration area of the dust collector is also different. When the filtration wind speed of the dust collector is determined, the processing air volume of the boiler is generally 3000m3/h, and the selection of boiler dust collector equipment of different tonnages is also determined. That is: the processing air volume divided by 60 minutes divided by the internal filtration wind speed of the dust collector is the filter area of the dust collector. The model of the dust collector is determined.
