Air box pulse bag filter selection:
Generally, according to the main technical parameters of the dust source processing gas, such as air flow, gas temperature, and dust concentration, the following steps should be used for selection.
1. Calculate the net filter area of ​​the dust collector according to the amount of gas to be treated:
F = Q / 60VN (?) Where: Q - amount of process gas (M3/H) VN - net filter speed (M/min)
The net filtration wind speeds of major dust sources in cement plants are shown in Table 1. The so-called net filtering wind speed and net filtering area refer to the filtering speed and filtering area when a room stops filtering and cleaning.
2. According to the calculated net filter area, the appropriate dust collectors can be directly selected from Tables 2, 3 and 4.
3, selection examples:
Example 1, a 3.5 × 12M cement mill, the mill ventilation volume is 30000M3 / H, the gas temperature is 110 gas concentration 150G / M3, try to use a FMQD-type bag filter.
(1) According to the given air volume of 30000 M3/H, the net filtration wind speed of the cement mill is known from Table 1. VN is 1.5M/MIN. Calculate the net filter area according to formula (1).
F= Q / 60 · VN = 30000 ÷ 60 × 1.5 = 333 (?)
(2) From the table, the FMQD-7 model has a net filter area of ​​372?, which is close to the calculated net filter area of ​​333?, so the FMQD64-7 dust collector can be selected. Because FMQD96-5 type net filter area and FMQD64-7 net filter area are the same, so you can also choose FMQD96-5 type dust collector. As to which type of model is more reasonable, the choice can be based on the geographical location of the installed dust collector. If the length direction is longer and the width direction is narrower, the FMQD64-7 type with more chambers can be selected, and the number of rooms can be selected instead. Less FMQD96-5 dust collector.
Example 2 The evacuation capacity of a clinker cooler with a daily capacity of 2,000 cement plants is 32,000 M3/H. Try to use an FMQD bag filter.
(1) Calculate the net filter area according to the work method according to the air flow rate of 32000 M3/H and check the net filter wind speed VN of the grate cooler from Table 1 to 1.7M/MIN.
F = Q / 60 · VN = 320000 × 60 ÷ 1.5 = 3137 (?)
(2) From Table 4, we know that FMQD128-210 has a net filtration area of ​​2959?, although it is less than the calculated net filtering area of ​​3137?, but the net filtration wind speed value is not much larger than 6%, so we choose FMQD128. The -210 dust collector is suitable.
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Generally, according to the main technical parameters of the dust source processing gas, such as air flow, gas temperature, and dust concentration, the following steps should be used for selection.
1. Calculate the net filter area of ​​the dust collector according to the amount of gas to be treated:
F = Q / 60VN (?) Where: Q - amount of process gas (M3/H) VN - net filter speed (M/min)
The net filtration wind speeds of major dust sources in cement plants are shown in Table 1. The so-called net filtering wind speed and net filtering area refer to the filtering speed and filtering area when a room stops filtering and cleaning.
2. According to the calculated net filter area, the appropriate dust collectors can be directly selected from Tables 2, 3 and 4.
3, selection examples:
Example 1, a 3.5 × 12M cement mill, the mill ventilation volume is 30000M3 / H, the gas temperature is 110 gas concentration 150G / M3, try to use a FMQD-type bag filter.
(1) According to the given air volume of 30000 M3/H, the net filtration wind speed of the cement mill is known from Table 1. VN is 1.5M/MIN. Calculate the net filter area according to formula (1).
F= Q / 60 · VN = 30000 ÷ 60 × 1.5 = 333 (?)
(2) From the table, the FMQD-7 model has a net filter area of ​​372?, which is close to the calculated net filter area of ​​333?, so the FMQD64-7 dust collector can be selected. Because FMQD96-5 type net filter area and FMQD64-7 net filter area are the same, so you can also choose FMQD96-5 type dust collector. As to which type of model is more reasonable, the choice can be based on the geographical location of the installed dust collector. If the length direction is longer and the width direction is narrower, the FMQD64-7 type with more chambers can be selected, and the number of rooms can be selected instead. Less FMQD96-5 dust collector.
Example 2 The evacuation capacity of a clinker cooler with a daily capacity of 2,000 cement plants is 32,000 M3/H. Try to use an FMQD bag filter.
(1) Calculate the net filter area according to the work method according to the air flow rate of 32000 M3/H and check the net filter wind speed VN of the grate cooler from Table 1 to 1.7M/MIN.
F = Q / 60 · VN = 320000 × 60 ÷ 1.5 = 3137 (?)
(2) From Table 4, we know that FMQD128-210 has a net filtration area of ​​2959?, although it is less than the calculated net filtering area of ​​3137?, but the net filtration wind speed value is not much larger than 6%, so we choose FMQD128. The -210 dust collector is suitable.
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