Positive pressure conveying system
Positive pressure conveying system is a simple pneumatic conveying system most basic form. In this system the air (or gas) in the feed conduit rim blown bulk solid material,
and transported to the end of collection bin unloading. Such systems generally use the fan or blower blowing
Air or other gas, the maximum pressure of 101. 32kPa (760mmHg). Basically the air are blown from the blower pipes, bulk solid material is from the hopper or silo bottom join
pipelines, suspended in the air duct to the discharge point along the pipeline. Discharge point through
The material is often another, bucket or silos for material gravity sink to make gas-solid separation. This raises two fundamental questions, namely how to make the material
into the air transportation system, and how to end the separation of the material from the air. So use feeding equipment supply materials. There are several types of pipe
Road feeder will satisfy the conditions added material in the hopper in the pipeline, such as rotary feeder, screw feeder, Venturi tube feeding machines. All of these feeding
devices can be controlled at a certain speed, feed, and can be operated continuously.
In pneumatic automated sorting machine system pipes discharge end of the separated material from the gas stream is typically used cyclone and baghouse to complete.
In general, low pressure blower pressure system located in front of the entrance to the material, the material feeding machine by rotating the feed rate of the design was
fed. In the material discharge point of the material of dust cyclone can be simply separated material from the air, but in the air
At the exit to add rain cover. If using a large collection of materials or silo silo can be directly connected with the pipe, the air via a simple opening with a hood exhaust.
In the case of a positive pressure system, particularly in the transport of toxic materials, material added to pipelines, dust removal equipment and acceptance of materials
on the hopper outlet pipe should adopt a special connection to prevent leakage into the environment. No regular feed gas pressure inside the pipe is produced
Fluctuations, and even make pipeline completely blocked. ¨ force feeder badly designed for hopper flow obstruction will produce the above phenomenon. Outlet clogged filters or
impede the flow of gas, will result in an increase in the partial pressure leak or cause changes in material flow systems.
For handling dusty materials, requiring silo baghouse gas ... port settings, this dust in the form of a weekly ring flange receptacle person receiving material or unloading
materials silos top, filter out the dust directly into the silo. If the delivery system for the intermittent operation, the addition
Dust can be either single-chamber type rapping. If the operation must be continuous, can be compressed air pulse cleaning baghouse.
. Positive pressure Turn conveyor system's main advantage is that it may have a plurality of discharge points, which can be used with the feed pipe and the use of cross-switching
valve to complete. Arranged in parallel, but not suitable for discharge, as to the leakage of air through the steering valve, such leakage amount of the total air required for
Amount is higher.