JPH053470Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a particle conveying device, and more particularly to the same device used for cyclone charge recovery at the rear of a fluidized bed gasifier.

[Conventional technology]

An outline of a conventional particle transport device will be explained with reference to FIG.

The injector body 1 is composed of an air nozzle 2 and a throat nozzle 3, and includes a suction pipe 6 and a driving air pipe 5.
and a differential user 4 are connected to each other.

Particles sucked from the suction pipe 6 are transferred to the driving air pipe 5
By supplying air to the air nozzle 2, the air is drawn by the jet generated from the air nozzle 2 and flows toward the diffuser 4 through the throat nozzle 3.

The particle diameter of the cyclone char at the rear of the fluidized bed gasifier is generally 30 to 40 μm, and the internal pressure of the channel is
20Kg/ ^cm3 , and the outer diameter of air nozzle 2 is 6.5mmφ.
The inner diameter of the throat nozzle 3 is 10.5 mmφ, and the distance between them is 2 mm.

[Problem that the invention attempts to solve]

With conventional conveying equipment, foreign matter (such as dirt) is trapped in the particles.
If foreign particles were mixed in, the gap between the air nozzle 2 and the throat nozzle 3 was narrow, causing blockage of the foreign particles and making it impossible to transport the particles. Therefore, it was necessary to install a strainer or crusher in front of the injector 1 to remove foreign matter.

However, there were problems such as the strainer itself becoming clogged and the strainer requiring large-scale equipment.

[Purpose of invention]

The present invention aims to provide a particle conveying device that is free from the problems encountered in the conventional devices described above.

[Means for solving problems]

The present invention consists of a vertical pipe into which particles are supplied from the upper end, a perforated plate having a funnel-shaped side surface and housed in the vertical pipe to partition the inside of the vertical pipe into upper and lower parts, and a lower space inside the vertical pipe divided by the perforated plate. a nozzle-type injector conveyor;
This particle transport device is characterized by having a suction pipe whose one end communicates with the nozzle of the transporter and whose other end is inserted into the space above the perforated plate in the vertical pipe and opens downward.

The particle conveying device of the present invention has a fluidized bed perforation plate with a funnel-shaped longitudinal section installed in a vertical pipe, and air is blown through the perforation plate to form a fluidized bed of particles, and the air is directed downward toward the freeboard part of the fluidized bed. A nozzle-type injector conveyor attached to the side of a suction tube inserted into the chamber is configured to suck particles and transport the particles.

[Effect]

Particles are supplied from a vertical pipe, and even if foreign matter is mixed in at this time, the particles are blown up and sucked up in the fluidized bed, but the foreign matter passes through the center of the funnel-shaped perforated plate and goes under the perforated plate. Fall.

After the fluidized bed, air is blown into a nozzle-type injector conveyor and suction of the particles is started through a suction pipe.

〔Example〕

One embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a longitudinal cross-sectional view thereof, and FIG. 2 is a cross-sectional view taken along the - line in FIG. 1.

A nozzle-type injector conveyor 1 is installed on the side of a vertical pipe 6 via a connecting pipe 3 and a suction pipe 2. A drive air nozzle pipe 5 is connected to the main body jacket portion of the nozzle type injector carrier 1. As shown in FIG. A suction strainer 7 is attached to the tip of the suction tube 2 within the vertical tube 6 to prevent any foreign matter from being suctioned.

A funnel-shaped perforated plate 8 is installed at the bottom of the vertical pipe 6, and is configured to blow out the air supplied from the purge air supply pipe 9 to form a fluidized bed of particles within the vertical pipe 6. There is. A space is provided in the center of the perforated plate 8 in which foreign matter can fall, and the foreign matter can be discharged from a valve 10 at the bottom.

Note that the holes drilled in the perforated plate 8 are opened in the same direction toward the tangent of a virtual circle at the center of the perforated plate 8, and a vortex is formed by the purge air jetted out through these holes. It is preferable to do so.

[Effect of idea]

The present invention eliminates the need to install a foreign matter removal device such as a strainer or crusher on the upstream side of the injector, unlike conventional particle conveying devices. Also,
Since several side wall nozzle type injectors can be installed around the side of the vertical tube, it is possible to distribute and transport particles.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the - arrow in FIG. 1, and FIG. 3 is a diagram showing an embodiment of a conventional particle conveying device. 1 and 2, 1 is a nozzle type injector, 2 is a suction pipe, 3 is a connecting pipe, 4 is a diffuser, 5 is a driving air nozzle pipe, 6 is a vertical pipe,
7 is a Saxon strainer, 8 is a vertical section funnel-shaped plate, and 9 is a purge air supply pipe.

Claims (1)

[Scope of utility model registration request] A vertical pipe into which particles are supplied from the upper end, a perforated plate having a funnel-shaped vertical section and housed in the vertical pipe to partition the inside of the vertical pipe into upper and lower parts, and a space below the vertical pipe separated by the perforated plate to carry gas for transport. a nozzle-type injector conveyor, and a suction tube whose one end communicates with the nozzle of the conveyor and whose other end is inserted into the space above the perforated plate in the vertical pipe and opens downward. Particle transport device.