JPS63305970A - Method of classifying dense bed material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for classifying dense bed materials, and more specifically, the present invention relates to a method for classifying dense bed materials, and more specifically, after the dense bed materials of a circulating fluidized bed boiler are extracted from the furnace. The present invention relates to a method for automatically classifying spherical substances and amorphous substances.

[Prior art]

Conventionally, when classifying spherical substances and amorphous substances from the dense bed material of a circulating fluidized bed boiler after it is extracted from the furnace, there is no easy method for automatically classifying it, and it is difficult to do so. Everything was done by hand.

However, after the dense bed material is extracted from the furnace, separating the spherical material and irregularly carved material from the dense bed material requires a lot of effort and time, and there is a problem that the workability is extremely poor. there were.

[Purpose of the invention]

This invention was devised by focusing on such conventional problems, and its purpose is to improve work efficiency by making it possible to automatically perform classification work without human intervention. The purpose of the present invention is to provide a method for classifying dense bed materials that can achieve the above-mentioned results and save labor.

[Structure of the invention]

In order to achieve the above object, the present invention provides a method for classifying spherical substances and amorphous substances in a dense bed material of a circulating fluidized bed boiler after the dense bed material is extracted from the furnace. From the mixture receiving hopper to which the dense bed material mixed with the regular substance is supplied, the dense bed material is fed onto the first stage screen to screen out substances smaller than the reference spherical material, and then the first stage screen The remaining substances on the screen are fed onto the second stage screen, and substances larger than spherical substances are discharged to the outside, while spherical substances and amorphous substances having the same size as spherical substances are sieved out and transferred. The amorphous material is fed onto a final classification conveyor having a predetermined inclination angle in the direction perpendicular to the direction, and the amorphous material is discharged to the outside by the final classification conveyor having a predetermined inclination angle, while the spherical material is The collected spherical substances are rolled in a direction perpendicular to the moving direction of the conveyor and collected in a hopper, and the collected spherical substances are discharged to the outside as necessary, and the spherical substances and amorphous substances taken out from the furnace are classified. In addition to improving work efficiency,
The gist of this is to save on manpower.

[Embodiments of the invention]

The present invention will be described in detail below based on the accompanying drawings.

FIG. 1 shows a schematic configuration diagram of a dense bed material classification apparatus according to the present invention, in which 1 is a mixture of spherical material Q and amorphous material P extracted from the inside of a circulating fluidized bed boiler (not shown). A mixture receiving hopper is supplied with dense het material, and the supply pipe 2 of the mixture receiving hopper 1 is
A first-stage screen 3 having a predetermined inclination angle is installed at the bottom of the screen, and a hopper 4 and a discharge pipe 5 are installed at the bottom of the first-stage screen 3.

Further, a second stage screen 6 having a predetermined inclination angle is installed on the discharge side 3a of the first stage screen 3, and a hopper 7 and a discharge pipe 8 are provided at the lower part of the second stage screen 6. There is.

A final classification conveyor 9 having a predetermined inclination angle in a direction perpendicular to the transfer direction X is installed at the bottom of the discharge pipe 8 as shown in FIGS. 1 to 3.
A hopper 10 and a discharge pipe 11 are provided at the bottom of the tank.

Next, a method for classifying dense bed material will be explained.

First, after extracting the dense bed material of the circulating fluidized bed boiler (not shown) from the furnace, the spherical material Q of the dense bed material
The dense bed material is supplied onto the first stage screen 3 from the mixture receiving hopper 1 and the supply pipe 2 to which the dense bed material is supplied. and,
Substances smaller than the reference spherical substance Q are sieved into the hopper 4 and discharged to the outside through the discharge pipe 5, and then the remaining substance Qa on the screen in FIG. 1 is supplied onto the second stage screen 6. , the substance R larger than the spherical substance Q is discharged to the outside.

On the other hand, the spherical material Q and the amorphous material P having the same size as the spherical material Q are sieved into the hopper 7 and discharged into the discharge pipe 8.
The final classification conveyor 9 has a predetermined inclination angle in a direction perpendicular to the transport direction X.

The amorphous material P is discharged to the outside by the final classification conveyor 9 having a predetermined inclination angle, and the spherical material Q is discharged to the outside by the movement of the final classification conveyor 9. The spherical material Q is rolled and collected in the hopper 10, and the collected spherical material Q is discharged to the outside as necessary.

In this way, the spherical material Q that was automatically classified and collected was
Since the spherical material Q and the amorphous material P taken out from the furnace are discharged to the outside as necessary, it is possible to improve the efficiency of the classification work of the spherical material Q and the amorphous material P, and to save manpower.

〔Effect of the invention〕

This invention provides a method for producing spherical material as a reference by supplying the dense bed material onto the first stage screen from the mixture receiving hopper to which the dense bed material, which is a mixture of the spherical material and the amorphous material, is supplied as described above. The substances smaller than the spherical substances are sieved out, and the remaining substances on the first stage screen are then fed onto the second stage screen, and the substances larger than the spherical substances are discharged to the outside, while the spherical substances and the substances of the same size as the spherical substances are discharged to the outside. The amorphous material having a shape is sieved and fed onto a final classification conveyor having a predetermined inclination angle in a direction perpendicular to the transport direction, and by this final classification conveyor having a predetermined inclination angle, the amorphous material is On the other hand, the spherical substances are rolled in a direction perpendicular to the moving direction of the final classification conveyor and collected in the hopper, and the collected spherical substances are discharged to the outside as necessary.
This has the effect of making it possible to improve the efficiency of the classification work of the spherical substances and amorphous substances taken out from the furnace, and to save labor.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a classification device implementing this invention;
FIG. 2 is a front view of the final classification conveyor, and FIG. 3 is a side view of FIG. 2. 1... Mixture receiving hopper, 3... First stage screen, 3a... Discharge side, 6... Second stage screen, 9
...Final classification conveyor, 10...Hopper, 11.
...Exhaust pipe, Q...Spherical substance, P...Amorphous substance,
X: Moving direction of the final classification conveyor.

Claims (1)

[Claims] A method for classifying spherical substances and amorphous substances in the dense bed material after extracting the dense bed material from the furnace of a circulating fluidized bed boiler, the method comprising: classifying the dense bed material into a mixture of the spherical substances and the amorphous substance; The dense bed material is fed from the mixture receiving hopper supplied with the material onto the first stage screen to sieve out substances smaller than the reference spherical material, and then larger than the spherical material remaining on the first stage screen. The remaining substances are fed onto the second stage screen, and substances larger than the spherical substances are discharged to the outside, while spherical substances and irregularly shaped substances having the same size as the spherical substances are sieved out and passed perpendicular to the transport direction. The amorphous material is fed onto a final classification conveyor having a predetermined inclination angle in the direction of A method for classifying dense bed material, characterized in that the spherical material is rolled in a direction perpendicular to the direction and collected in a hopper, and the collected spherical material is discharged to the outside as necessary.