JPH0511219Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coal stream splitting device, and more particularly to a device for reliably splitting a large stream of coal into a plurality of smaller streams.

In the prior art, it has been difficult to satisfactorily divide large streams of airborne coal into smaller streams. One method is to use so-called aerodynamic flow dividers, in which the tubes conveying the coal are divided. However, this method has the following drawbacks. The accuracy of the segmentation is less than desired, there are stability issues, flow rates can cause erosion, and variable bottom flows, especially in conduits, can create sediments and blockages. However, other expensive methods use separate small supply conduits. Finally, LGCardwell
Author “Some Developments in the Feeding of
In the book "Coal to Fluidized Bed Combustors" it is stated that coal can be distributed between the compartments by means of a rotating device, but that the coal distributed therefrom is in a dense state.

The present inventor has determined that by mechanically evenly dividing a large flow between multiple compartments and then transferring the contents of the compartments in a dilute state to each of the smaller conduits, the division of the coal stream is stabilized. It has been found that it can be done evenly and accurately between small streams and at low velocities which greatly reduces erosion.

In the preferred embodiment, distribution to the compartments is provided by a hollow rotor having an outlet offset from the axis of rotation of the rotor.

Next, the configuration and operation of the preferred embodiment of the present invention will be described with reference to the drawings. The drawings illustrate a flow divider 10 that is a preferred embodiment of the present invention.

Flow divider 10 is provided with a housing 12 . A shaft 14, which is driven by a pulley 16 and a belt 18, is rotatably mounted within the housing 12. Hollow conduit rotor 20
is mounted on the shaft 14 so as to be able to rotate together with the shaft 14, the rotor 20 supports a funnel 22 at the inlet end, and the lower end 24 is attached to the shaft 14.
4, but are offset so as to be arranged in a rotational sweep over a lower annulus divided into compartments by walls 26. An outlet tube 28 extends from each compartment separated by a pair of walls 26.

The outlet tube 28 is 1.5" to 2" in diameter and the inlet conduit 30 is sized to supply a sufficient amount of air to the outlet tube 28 to maintain the desired velocity.

In operation, a sufficient amount of carrier air is injected through the inlet conduit 30 to maintain the exit air velocity in the outlet conduit 28 at 40 t/s. This air volume and velocity is sufficient to convey the coal through the outlet pipe 28 in a lean (pneumatic) condition compared to the dense or non-pneumatic configuration dispensed from the splitter in the Caldwell book discussed above. It is.

Coal is fed through a funnel 22 from a crusher (not shown) in a particle size of 6.35 mm (0.25'').

When the rotor 20 rotates, the rotor 20 hits the wall 2
Equal amounts of coal are successively deposited in the various compartments separated by 6. From these compartments, conveyed air from conduit 30 travels through housing 12;
An equal amount of coal is transferred through outlet pipe 28.

[Brief explanation of the drawing]

The drawing is a perspective view of the dividing machine of the present invention. 10...Divider, 12...Housing, 14...
...Shaft, 16...Pulley, 18...Belt,
20... Rotor, 22... Funnel, 24... Lower end, 26... Wall, 28... Outlet pipe, 30... Inlet conduit.

Claims (1)

[Scope of utility model registration request] Walls extending radially around the axis are erected on the inner bottom surface of the vertical cylindrical housing to form a plurality of compartments each having an open upper end between each wall and the side wall of the housing, A hollow conduit for introducing coal from the top along the axis is inserted, a lower end outlet of the hollow conduit is positioned eccentrically from the axis above the compartment, and the hollow conduit is inserted from the bottom of the housing along the axis. The upper end of the rotating shaft is connected to the hollow conduit to rotate the hollow conduit about the axis, and the conveying air is forcibly introduced into the housing at a position higher than the lower end outlet of the hollow conduit in the housing. A conveying air conduit is connected, and the coal coming out of the outlet of the hollow conduit is blown downward by the conveying air and falls into the compartment, and is also discharged to the outside from the discharge conduit by the conveying air. A coal flow splitting device.