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Composition of negative pressure pneumatic conveying system
2019-09-26 Source: wglobalnba.com Author: Rich Machinery read: Times
The ash gas separation equipment used in the negative pressure pneumatic conveying system is usually composed of a mountain cyclone dust collector and a bag dust collector. The cyclone dust collector adopts a double-door chamber structure. The bottom of the bag dust collector is connected to the ash storage with a negative pressure air lock valve to isolate the pipeline negative pressure from the normal pressure in the storage to ensure the safety of transportation and ash storage. Cyclone dust collector is a first-level separation equipment. The efficiency of the dust collector is> 70%, and the efficiency of the second-level bag filter is> 99%. Both of these devices are manufactured according to pressure vessels. The clean air after secondary dust removal is discharged into the atmosphere through a negative pressure fan. In addition, the ash warehouse is also provided with an exhaust bag filter, which is used to treat the clean air after the dusty gas such as gasified air in the warehouse is directly discharged into the atmosphere. According to the physical and chemical characteristics of fly ash, bag dust collectors should adopt pulse backflushing, and the dew point temperature of backflushing air should be -23 ~ -40 ℃ (normal pressure dew point).
Pneumatic conveying system site
The air source of the negative pressure pneumatic conveying system is provided by the pressure fan or vacuum. Generally, the pressure is required to be below -0.6Mpa. Because a certain amount of dust is inevitable in the air flow through the fan, the parts on the flow channel of the negative pressure fan should be Abrasion resistance, good dustproof effect of seals. Negative pressure fans are generally arranged near the gray warehouse.

Negative pressure pneumatic conveying system is generally controlled by PLC program. Analog or CRT display can be selected. The upper computer performs data processing and runs fully automatically. Signal output, processing and networking are very convenient.
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