Product
1. System
Introduction
Our positive pressure dense phase
conveying system is well accepted by many customers for its characteristics of
simple structure, flexible placement, reliable operation, high automation, less
investment, high conveying ash-air ratio, slow flow speed, less maintenance,
low annual operation cost and etc.
2. Working Principle
The dense
phase conveying system combines jet and fluidization technology and it is
mainly used for conveying of powdery materials. After the materials enter the
pump and go through the aerification pipe, they will successfully go into the
mixing chamber in a state of fluidization. Meanwhile, high pressure air is
jetted out from the nozzle at a high speed and thoroughly mixed with fluidized
materials. The speedy airflow carries with materials going through the conveying
pipe so that materials conveying can be done. When materials via shut-off valve
and bell jar valve enter the storage tank, the output pneumatic ball valve is
shut off while the exhaust valve is turned on. When the materials’ level inside the storage tank reaches the set value (controlled by
level sensor), the materials shut-off valve and exhaust valve are shut off, successively
the bell jar valve is shut off in a few seconds. At this time the inlet valve
(pressurized valve) on the storage tank is turned on to inflate and pressurize
the storage tank. When the pressure inside storage tank reaches the set value,
the output pneumatic ball valve and the blow assisting valve that installed on
the nozzle will open at the same time. Then materials enter the silo via
conveying pipe at a faster rate under the action of aerodynamics. The conveying
pipe is a turbulence double-pipe with its feature of forming some scattered
material flows within the pipe, which can avoid the material blockage. When all
the material inside the storage tank is emptied out, the system will automatically
return to the starting state.
3. Composition
The alumina dense phase conveying system mainly consists of materials
shutoff valve, expansion joint, bell jar valve, pressure vessel, air tank,
exhaust valve, output pneumatic ball valve, outlet cone, nozzle, blow assisting
valve, reducing valve, conveying pipe, diverter, pressure transmitter, level
sensor and PLC controlling system, etc.
4. Characteristics
Our dense phase conveying system adopts advanced domestic technology. The
conveying tank system adopts PLC which can realize full automatic control and
can also achieve local control and centralized control. The upper computer
carries out an overall monitoring. The conveying pipe adopts the turbulence
double-pipe which has the advantage of conveying materials smoothly without
blockage. Dense phase pipe is composed of outer pipe which is the main
conveying pipe and the inner pipe which is mainly used for adjusting the
compressed air. There are scallop holes evenly distributed on the inner pipe so
that air can be blown out from the scallop holes and the materials will be
divided into several segments in a columnar distribution which can fairly
ensure a smooth conveying without blockage. The system has a lower damage ratio
which makes a breakthrough in the limitation on the conveying distance and
density for the similar domestic positive pressure dense phase conveying in
other forms. It is characterized by simple air supply equipment, high conveying
density, low conveying speed, little pipe wear, long conveying distance, less
investment & operation cost, simple operation & maintenance with
certain reliability, etc.
We can satisfy various requirements from customers by making special design
on conveying distance and speed.
