1.The design of the hopper for a bag - type dust collector mainly includes the following aspects:

① The pressure - bearing strength of the hopper should be designed according to 120% of the full - pressure of the fan under full - load operating conditions. It should be able to withstand the system pressure and the weight of accumulated ash for a long time. The volume of the hopper should take into account the ash storage amount during the unloading interval of the ash - conveying equipment.

② Except for single - unit bag - type dust collectors, access doors should be set on the hopper.

③ A manual slide - gate valve should be installed between the ash - unloading valve and the hopper.

④ When dealing with flue gas prone to dew - point condensation or collecting dust with relatively high stickiness, a level gauge, heat - tracing and insulation devices, and an anti - arching device should be installed in the hopper.

⑤ Measures should be taken to prevent the filter bags from falling off and blocking the ash - unloading port, and damaging the ash - unloading equipment.

⑥ The level gauge and the anti - arching device of the hopper should not be set on the same side.

⑦ The ash - unloading equipment should meet the technical conditions of electromechanical products, meet the requirements of the maximum ash - unloading capacity and ensure air - locking of the hopper to avoid dust escape.

2.Precautions for the Hopper of Bag - type Dust Collector

① The wall plates of the hopper are generally made of 6 - mm - thick steel plates.

② The strength of the hopper should meet the requirements of air - flow pressure, wind load, and local seismic conditions.

③ To ensure the airtightness of the dust collector, it is not advisable to completely empty the dust in the hopper to avoid outdoor air being sucked in through the ash - discharging port at the bottom of the hopper, which may affect the purification efficiency of the dust collector.

④ The effective ash - storage volume of the hopper should not be less than the amount of captured dust in 8 - hour operation.

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