JP2001200269A - Coal modification device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coal modification device which dries and carbonizes coals via circular-grating method. SOLUTION: The coal modification device 1 has a coal drying means and a coal carbonizing means on substantially the same surface of revolution. Here, the above-mentioned surface of revolution is a circular moving surface and is divided into a drying zone A, a carbonization zone B and an exhaust zone C by a dividing plate 22. A coal-supplying aperture 24 is established at the upper part of the drying zone A, a coal-exhaust aperture 34 is established at the lower part of the exhaust zone, a drying gas-supplying aperture 35 and a drying gas-exhaust aperture 25 are established within the drying zone, and a carbonization gas-supplying aperture 36 and a carbonization gas-exhaust aperture 26 are established within the carbonization zone. The coals successively pass through the drying zone A, the carbonization zone B and the exhaust zone C while revolving. A grate tray 2 which tilts at an angle allowing the coals to drop at the exhaust zone, is installed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coal reforming apparatus for drying coal and distilling coal by a circulatory method.

[0002]

2. Description of the Related Art In recent years, a coal reforming method has been proposed in which the water content of low-rank coal such as subbituminous coal and lignite, which has a large reserve, is reduced by a heat treatment process, and furthermore, the pyrophoricity is suppressed by pyrolysis. The method has been put to practical use in an actual plant. FIG. 4 is a perspective view showing the above-described conventional coal reforming plant, and FIG. 5 is a cross-sectional view schematically showing the inside of a coal drying apparatus and a coal carbonization apparatus of the plant.

[0003] As shown in the figure, a coal drying apparatus 100 and a coal carbonization apparatus 110 are arranged vertically, and the coal is moved between the two apparatuses for processing. First, while rotating the rotating body 101 in the main body 103 of the coal drying apparatus 100, the coal 51 is supplied from the coal supply port 104 to the great 10 in the rotating body 101.
2 from the drying gas supply port 105, for example, 20
A dry gas 52 using an inert gas at 0 ° C. is supplied, and is passed between the great 102 and the coal 51 to be discharged from the dry gas discharge port 106.
Is discharged from the coal discharge port 107 and supplied to the coal supply port 114 of the coal carbonization apparatus 110.

[0004] The coal 5 supplied from the coal drying apparatus 100
1 is the same as the above-mentioned coal drying apparatus 100, the great 112 of the rotating body 111 in the main body 113 of the coal carbonization apparatus 110.
While sliding down, a dry distillation gas 53 using, for example, an inert gas at 600 ° C. is supplied from the dry distillation gas supply port 115,
It passes between the great 112 and the coal 51 and is discharged from the carbonization gas outlet 116, and the carbonized carbon 51
By discharging coal from the coal discharge port 117,
Is modified.

[0005]

However, in a plant for reforming such low-grade coal, since the coal 51 is treated as a moving bed, the coal 51 is pulverized and scattered. It is necessary to improve the performance of peripheral equipment such as a cyclone due to a decrease in production volume and the scattering of coal 51,
There are many problems, such as high costs for maintenance for removing pulverized coal adhering to the grate and equipment.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a coal reforming apparatus provided with a coal drying means and a coal carbonization means, wherein the coal drying means and the coal carbonization means are arranged on substantially the same rotating surface and integrated. The present invention is achieved by a coal reforming apparatus characterized in that coal is rotated without forcibly moving between layers.

[0007] The "substantially the same rotation surface" here means:
It is sufficient that the means for drying and carbonizing coal are on substantially the same surface.Even if there is a slight up and down in the arrangement of each means, each means is integrated into the rotation area of the same height in the apparatus. I just want to be able. The rotating surface is formed in an annular shape because a plurality of great trays 2 inside the rotating body 1 described below can be rotated endlessly. Therefore, specific shapes include, for example, a circular shape and an elliptical shape, and in the present invention, a donut-shaped rotating surface is particularly preferable.

Specifically, the same rotating surface is formed into a donut shape, which is divided into a drying zone, a carbonization zone and a discharge zone by a partition plate, and a coal supply port is provided above the drying zone. , A dry gas supply port and a dry gas discharge port are provided in the drying zone, and a dry carbon gas supply port and a dry carbon gas discharge port are provided in the dry carbonization zone. And a built-in great tray that tilts at an angle at which coal is dropped in the discharge zone by sequentially rotating and passing through the discharge zone.

In the apparatus of the present invention, those conventionally used as a dry gas and a carbonization gas are used, and it is particularly preferable to use an inert gas. Further, the temperature of the dry gas used in the apparatus of the present invention can be changed according to the components of the low-grade coal to be treated, for example, 200 ° C. The temperature of the carbonized gas can also be changed according to the components of the treated coal, for example, 600 ° C.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to embodiments, but the content of the present invention is not limited to these embodiments. In the description, the same members as those in FIG. 4 or FIG. 5 are denoted by the same reference numerals, and redundant description will be omitted.

[0011] An embodiment of the present invention is directed to an apparatus in which the coal drying means and the coal carbonization means are arranged on substantially the same rotating surface, and the coal is rotated without forcibly moving between the upper and lower layers. This is an example. Hereinafter, this will be described in detail with reference to FIGS. As shown in FIGS. 1-3, in this embodiment,
It mainly comprises a donut-shaped rotating body 1 and upper and lower covers 21 and 31 located above and below the rotating body 1.

An outer support ring 6 and an inner support ring 7 on which guide rails 8 are mounted are provided on the lower surfaces of the outer peripheral surface and the inner peripheral surface of the donut-shaped rotating body 1. The support rings 6 and 7 are engaged with the guide rails 8, respectively, and the drive roller 41 is rotated by a motor 43 fixed to the lower cover 31, and the support is fixed to a bearing 44 fixed to the lower cover 31. It is supported by the rollers 42.

A plurality of great trays 2 provided inside the rotating body 1 are provided together with an arm shaft 5 and a weight roller 4 penetrating through the outer plate of the rotating body 1, with the required centering around the rotational axis of the rotating body 1. It is installed so that it can rotate at an angle. The rotating body 1 is normally supported by a stopper 3 fixed to the outer surface and the inner surface of the rotating body 1 so as not to rotate by the weight of the weight roller 4.

An upper cover 21 fixed on the upper part of the rotating body 1
Is provided with a coal supply port 24, a dry gas discharge port 25, and a carbonization gas discharge port 26. Above the coal supply port 24, a quantitative feeder 46 is disposed. Upper partition plates 22 and 23 are mounted inside the upper cover.
The lower portions of 2 and 23 reach above the great tray 2 of the rotating body 1.

A lower cover 31 fixed to the lower part of the rotating body 1
Is provided with a coal discharge port 34, a dry gas supply port 35, and a carbonization gas supply port 36 having a fixed amount feeder 40, a weight roller 4, an arm shaft 5 engaged therewith, and a great tray. A guide plate 39 for rotating the rotary member 2 is mounted. In addition, a conveyor 48 is arranged below the coal discharge port 34. Similarly to the upper cover 21, lower partitions 32 and 33 are mounted inside the lower cover 31, and the upper portions of the lower partitions 32 and 33 reach below the great tray 2 of the rotating body 1. I have.
Thus, the internal space of the rotating body 1 is divided into upper and lower partition plates 22, 23, 32 attached to the upper cover 21 and the lower cover 31.
And 33, and a drying zone A, a carbonization zone B, and a discharge zone C as shown in FIG. 2 are formed.

The procedure of coal reforming in the coal drying / distilling apparatus of the present invention will be described. First, the motor 43 is driven, and the outer support ring 6 is rotated by the drive roller 41.
In the direction of the white arrow. At this time, the support roller 42 supports the rotating body 1 via the inner support ring 7. On the other hand, the coal 51 is supplied from the coal supply port 24 onto the great tray 2 rotating and moving in the drying zone A by the quantitative feeder 46, and the inert gas at, for example, 200 ° C. is supplied from the drying gas supply port 35 in the drying zone A. Is supplied and discharged from the drying gas discharge port 25.
Meanwhile, the coal 51 is dried by passing the drying gas 52 between the great tray 2 and the coal 51.

Next, in the carbonization zone B, the carbonization gas 53 is supplied from the carbonization gas supply port 36 and the carbonization gas discharge port 26 is provided.
To be discharged from For example, the coal 51 is carbonized by passing a carbonization gas 53 containing an inert gas at 600 ° C. between the great tray 2 and the coal 51 which have been rotationally moved to the carbonization zone B. Finally, when the great tray 2 on which the modified coal 51 is loaded is rotated to the discharge zone C, the weight roller 4
9 and rises, the arm shaft 5 rotates and the great tray 2 tilts at a required angle, and the loaded coal 51
To the coal outlet. The coal 51 is supplied to the conveyor 48 by the quantitative feeder 40 and transported to the next step.

[0018]

According to the apparatus of the present invention, since the drying zone A and the carbonization zone B are integrated into the same rotation area in the apparatus, it is not necessary to treat the coal 51 as a moving bed. Since the coal 51 is not dropped from the drying device to the carbonization device, it is possible to prevent the coal 51 from being pulverized.
Therefore, the productivity of the reformed coal can be improved, the structures of the coal reforming apparatus main body and peripheral devices can be simplified, and the maintenance cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention, and is a partially cutaway view.

FIG. 2 is a plan view showing a cross section taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a perspective view showing a conventional coal reforming plant.

FIG. 5 is a cross-sectional view schematically showing the interior of a conventional coal drying apparatus and a coal carbonization apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotating body 2 Great tray 4 Weight roller 5 Arm shaft 6 Outer support ring 7 Inner support ring 8 Guide rail 21 Upper cover 22 Upper partition plate 23 Upper partition plate 24 Coal supply port 25 Dry gas discharge 26 Dry distillation gas discharge port 31 Lower cover 33 Lower partition plate 34 Coal discharge port 35 Dry gas supply port 36 Dry carbon gas supply port 39 Guide plate 41 Drive roller 42 Support roller 44 Bearing 51 Coal 52 Dry gas 53 Dry carbon gas A Dry zone B Dry carbon zone C Discharge zone -100 100 Coal drying device 101 Rotating body 102 Great 103 Main body 104 Coal supply port 105 Dry gas supply port 106 Dry gas discharge port 107 Coal discharge port 110 Coal carbonization apparatus 111 Rotary body 112 Great 114 Coal supply port 115 Dry carbonization gas supply port 116 Carbonized gas exhaust Mouth 117 coal outlet

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Keiichi Sato 4-62 Kannonshinmachi, Nishi-ku, Hiroshima-shi, Hiroshima F-term in Mitsubishi Heavy Industries, Ltd. Hiroshima Works 4H012 RA05

Claims (2)

[Claims] 1. A coal reforming apparatus comprising a coal drying unit and a coal carbonization unit, wherein the coal drying unit and the coal carbonization unit are arranged on substantially the same rotation surface, and the coal is forcibly moved between layers. A coal reforming apparatus characterized in that it is made to rotate without being rotated. 2. The rotating surface is an annular moving surface, which is divided into a drying zone, a carbonization zone, and a discharge zone by a partition plate, and a coal supply port is provided above the drying zone. A coal discharge port is provided below, a dry gas supply port and a dry gas discharge port are provided in the drying zone, a carbonization gas supply port and a carbonization gas discharge port are provided in the carbonization zone, and the drying zone, the carbonization zone and the discharge zone are provided. The coal reforming apparatus according to claim 1, further comprising a great tray that is rotated at an angle at which the coal is sequentially rotated and passed to drop the coal in the discharge zone.