Pneumatic ash handling and conveying system
As an efficient and environmental protection technology, pneumatic conveying technology is more and more widely used in various industries, especially in the power industry. "Pneumatic ash handling and conveying system" is a kind of conveying device which uses air as the conveying medium and power to transport the dry ash of each ash hopper of the boiler to the designated place.
Pneumatic ash handling and conveying system Air is used as the conveying medium and power to receive the air chamber at the end of the boiler. The interlayer between them is made of fiber fabric material. The fluidizing air penetrates evenly into the human body ash layer through the fiber fabric interlayer from the bottom chamber of the device to make the ash flow along the inclined direction of the tank body after fluidization. The slope of the air duct is generally not less than 5 degrees. This kind of packing has simple structure and less energy consumption, but its distribution is limited by the space required by the slope, and is mainly used for the centralized transportation of dry ash on the ash hopper of the dust collector. The fine ash from ash hopper (such as hot surface, flue and dust collector) is transported to the process facilities at the storage site through pipelines or other sealing devices. The selection of conveying route and distribution is flexible, but due to the high speed and high power consumption, John's pipeline is seriously worn, and the transmission distance is limited by the pressure of power equipment.
Pneumatic conveying is a kind of closed pipeline transportation system. Flexible arrangement; no secondary pollution; high efficiency and energy saving; it is convenient for material transportation and recovery, computer control no leakage transportation, high degree of automation.
3. Basic composition
1. Feeding device: pressure vessel, airlock valve, rotary feed valve and screw feeder
2. Air supply device: air compressor, roots blower, centrifugal blower door, dryer, air storage tank, pressure regulator
3. Pipeline: straight pipe, wear-resistant elbow, pipe jacking, pipe change-over valve and expansion joint
4. Feed gas separator: cyclone separator, bag filter instrument and control system: pressure transmitter, material level meter, pressure switch, local control cabinet, programmable controller
Conclusion: the application and development of pneumatic conveying technology in China's dust removal system is slow. The main reason is that the dust removal equipment has many uneven dust outlets. In addition, due to the improvement of comprehensive technical level and the unique advantages of pneumatic conveying in recent years, the imperfection of conveying components has brought many difficulties to the design and use, and has been gradually adopted by large-scale dust removal projects. Pneumatic conveying technology has broad application prospects. According to the pressure difference of the conveying system, Pneumatic ash handling and conveying system It can be divided into negative pressure type and positive pressure type. The negative pressure system uses the negative pressure in the system to suck air and ash into the pipeline together, and the whole conveying process of materials is carried out under atmospheric pressure. The positive pressure system uses compressed air above atmospheric pressure to push the material to be transported.
"Pneumatic ash handling system": http://theoxfordjazz.com/qlss/143.html
More related recommendations