Application of flour pneumatic conveying system
? ? Flour pneumatic conveying systemThe technology of using airflow with a certain speed and pressure to transport bulk materials through pipelines is called pneumatic conveying, which is one of the methods of material handling. Due to the formation of wind by the airflow, pneumatic conveying is also commonly known as air delivery system. The pneumatic conveying system is widely used in flour mills, not only for conveying wheat and flour, but also for grading, selection, and crushing operations; The following are the specific application types of flour pneumatic conveying in Shandong Juheng Environmental Protection Equipment Co., Ltd.:
? ? The entire process of flour production can be divided into three stages: selection, crushing, and refining. Positive pressure pneumatic conveying is often used in the selection and refining stages; During the crushing stage, negative pressure pneumatic conveying systems, also known as suction pneumatic conveying, are commonly used. The working process of positive pressure pneumatic conveying: The fan is installed at the starting end of the system for pressure feeding. When the fan is started, the pressure in the pipeline is higher than atmospheric pressure. At this time, the material is fed into the conveying pipeline from the hopper through the rotating feeder and transported to the separator. At this time, the material is separated from the air. The separated material is discharged from the unloader, and the airflow is purified by the bag filter and discharged into the atmosphere.
? ? The wheat is transported using a positive pressure pneumatic conveying system, and the system's air source equipment is a Roots blower with a wind pressure of 14710-19613Pa, an air volume of 15-20m3/min, a power of 10-15KW, and a conveying wind speed of 15-20m/s; The rotary feeder can be customized according to the conveying requirements. The feeder made by Juheng has good air tightness and can continuously supply wheat to the conveying pipeline in a quantitative manner. Combined with a Roots blower, the airflow and wheat are fully mixed through the pipeline and transported to the unloading point along with the airflow.
? ? Flour also adopts a positive pressure pneumatic conveying system, which uses a Roots blower with a wind pressure of 19631-49033Pa and a conveying wind speed of 10-15m/s. The suction and air delivery system, also known as negative pressure pneumatic conveying, works as follows: the fan is installed at the end of the system, and when the fan is running, the entire system forms negative pressure - there is a pressure difference inside and outside the pipeline, air and materials are sucked into the pipeline - they are sent to the separator through the pipeline - in the separator, materials and air are separated - the separated materials are discharged from the unloader at the bottom of the separator - and the air is sent to the bag filter for purification - the purified air is discharged into the atmosphere or recycled through the fan.
? ? The commonly used negative pressure air supply system in the crushing stage uses a centrifugal fan as the air source power equipment, which is installed at the end of the system, with a wind pressure of -5880 to -11760Pa, an air volume of 100-120m3/min, and a conveying wind speed of 15-22m/s.