KR890003462B1 - Method of and apparatus for discharging pulverulent and granular substance from hermetical cooling furnace - Google Patents

Abstract

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Description

Granular discharge method and device in airtight vertical cooling furnace

1 is a sectional view showing the main parts of an exception discharge device in which a rotary valve is installed at a lower part of a vertical cooling furnace for a granular body.

2 is a sectional view showing the main portion of an embodiment of the present invention in which a vibration feeder is installed at the bottom of a vertical cooling furnace for granular bodies and a rotary valve is installed at an outlet of the vibration feeder.

3 is a perspective view of a rotor in a rotary valve used in the present invention.

4 is a sectional view showing the principal parts of another embodiment of the present invention in which an apron feeder is installed at a lower part of a vertical cooling furnace for granular bodies, and a rotary valve is installed at an outlet of the apron feeder.

FIG. 5 is a sectional view showing the principal parts of another embodiment of the present invention in which a roll feeder is installed at the bottom of a vertical cooling furnace for granular bodies and a rotary valve is installed at the outlet of the roll feeder.

Technology and Background

The present invention relates to a method and apparatus for discharging the granules in an atmosphere shielded from the atmosphere from a vertical cooling furnace for granules requiring a hermetically sealed.

As a device for discharging a vertical cooling furnace for granular bodies that requires airtightness, for example, the coke cooled from a vertical cooling furnace of a dry coke cooling system for recovering sensible heat of the red coke discharged from the coke oven and saving energy. There is a discharge device for discharging.

The device for discharging the granular body from this vertical furnace is desired to be lowered in order to reduce the overall cost of the plant.

For example, the Soviet "Gypro Coke System" is equipped with a cut gate at the bottom of the vertical cooling furnace to continuously discharge coke in a batch manner.

Such batches of coke are once transported to the coke wharf under hermeticity via a sealed hopper with a double sealed valve, and then the coke batch is delivered through a warp gate provided in the warp. It is continuously delivered to the discharge gate. However, even in these installations, the overall height of the discharge device is inevitably high.

Japanese Patent Laid-Open No. 36184/82 corresponding to U.S. Patent Nos. 4, 344, and 823 includes an apparatus for continuously cutting and discharging granular bodies in a terminally cooled state in a vertical cooling furnace. This device also suffers from a height of the device by using a sealing hopper with a double sealing valve as the airtight means.

Moreover, as shown in FIG. 1, the apparatus which uses the rotary valve 1 which directly faces the granular outlet 5 of the vertical cooling furnace 2 is also known. However, this device has a difficulty in that coke is pinched between the rotor 3 and the casing 4 and the coke is crushed, thereby increasing the driving load as well as rapid wear of the rotor 3 and the casing 4. have. As a result, the airtight function of the device is degraded within a short time, which makes the implementation of the device difficult.

Summary of the Invention

The present invention solves the above-mentioned problems, and it is an object of the present invention to provide a discharge device that can continuously discharge the granular body while maintaining airtightness without increasing the overall height of the device.

For this purpose, in the present invention, the bucket is excessively cut into the bucket on the rotor of the rotary valve, which is continuously and quantitatively cut out from the lower part of the cooling chamber of the cooling furnace under the atmosphere blocked from the atmosphere. The granular body is supplied so as not to be filled, and the granular body is discharged from the bucket to the atmosphere as the rotor rotates.

According to another feature of the present invention, in the discharge device of a vertical cooling furnace for granular bodies requiring airtightness, an airtight chamber communicating with the outlet at the lower part of the granular outlet of the cooling chamber and having an opening for discharging the granular bodies is provided. And a conveying apparatus for continuously and regularly delivering the granular body from the granular body exit to the opening of the hermetic chamber is provided inside the hermetic chamber, and is provided with at least one bucket around the airtight chamber and the bucket is rotated according to rotation. Provided with a rotary valve for rotating the rotor to communicate in an airtight state with the opening of the opening is provided with a discharge device for continuously discharging the granular body as the rotor rotates.

According to the present invention configured as described above has the following effects.

(1) Since the granular body can be continuously discharged while maintaining the airtightness of the vertical cooling furnace, there is no need for a facility for temporarily storing the granular body such as a coke warp and a sealing hopper.

(2) In addition, because the rotary valve is used instead of the double sealing valve to maintain the airtightness of the vertical cooling furnace, the height of the discharge device is lowered, thereby lowering the overall equipment of the vertical cooling furnace and reducing the equipment cost.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Best Mode for Carrying Out the Invention

2 shows an airtight chamber 16 under the granular outlet 15 of the vertical cooling furnace 12, and a vibration feeder 17 is provided as a conveying device in the airtight chamber. The rotary valve 11 is installed adjacent to the outlet. In the figure, 13 is a rotatable rotor, 14 is a casing for accommodating the rotor 13, 18 is a rotor blade, and is in contact with the inner circumferential surface of the casing 14 to maintain airtightness of the hermetic chamber 16. In the present embodiment, the airtightness is maintained by direct contact between the casing and the rotor blades, but the airtightness may be maintained through the sealing means between the two.

As shown in FIG. 3, the rotor 13 is preferably provided with a side wall 19 in order to increase airtightness, and the vibrating feeder 17 continuously and regularly discharges the granular body to the rotary valve 11. The granules are supplied to the supply port 20, and the granular bodies are accommodated in a plurality of buckets radially around the rotor 13 by the rotor blades 18 and the side walls 19, and the rotor is driven by a driving device (not shown). In accordance with the rotation of the (13), it is discharged from the rotary valve (11) and conveyed to the discharge belt conveyor (21).

Since the vibration feeder 17 has a good quantitative discharge performance other than a large particle size of 200 mm or more in particular, it is not supplied beyond the capacity of each space constituted by the rotor blades 18 and the side walls 19, that is, the bucket part, that is, fullness. The amount of supply can be controlled so that the granular body can be accommodated in the bucket part. Moreover, since the vibration feeder 17 was provided upstream of the rotary valve 11, the fall flow width b of a granular body is made small with respect to the opening width a of the supply port 20 to the rotary valve 11. As shown in FIG. It is possible to prevent the granular body from being pinched between the rotor blades 18 and the casing 14.

In addition, the detailed working conditions such as the relationship between the discharge amount by the vibration feeder 17 and the discharge amount by the rotary valve, that is, the capacity of each bucket and the rotational speed of the rotor 13, are described in detail. It is to be decided according to each facility according to the desired discharge and so does not give any detailed explanation here.

In addition, although the tip end wear of the rotor blades 18 hitting the falling flow of the clinical body at the supply port 20 is a problem, the granular body supplied to the supply port 20 to the rotary valve 11 by the vibration feeder 17. Since the fall speed of the rotor blade can be minimized, it can be supplied gently to suppress wear of the tip of the rotor blade 18. Moreover, wear of this part is local, and even if a wear-resistant material such as high Cr cast iron is used, the equipment cost of the entire rotary valve 11 is not a problem.

When a high degree of airtightness is required, a high degree of airtightness can be maintained by replacing an ultra-wearing material such as silicon nitride ceramic with this part or by periodically changing it as an exchangeable structure.

And the vibration feeder 17 is low in installation cost, durable enough and high practicality. In particular, in the present invention, it is important to have a small size as the quantitative discharge device, and the equipment cost is reduced by lowering the entire cooling furnace as well as the discharge device.

However, the conveying apparatus of the present invention is not limited to the vibrating feeder, and FIG. 4 shows an example in which the apron feeder is installed upstream of the rotary valve as the metered discharge device in another embodiment of the present invention.

In FIG. 4, 117 is an apron feeder provided in the hermetic chamber 116, and the same code | symbol as the case of FIG. 2 is used for the other components as it is the same as that of the embodiment shown in FIG.

The characteristic of the apron feeder 117 is that the quantitative discharging property is good even for discharging the granular material having a large particle size, and is the most excellent in terms of the quantitative discharging property. However, in the present invention, in the combination with the rotary valve 11, In order to narrow the flow width b, it is preferable to provide a small chute 111 to prevent the granular body from being caught in the rotary valve 11.

As another embodiment, FIG. 5 shows an example in which a roll feeder is used as a metered discharge device upstream of a rotary valve.

In the figure, 217 is a roll feeder installed in the hermetic chamber 216, and the same reference numerals as those in Figs. 2 and 4 indicate that they are the same as the components used in the embodiment shown in the figure.

The feature of the roll feeder 217 is that the structure is simple, excellent in durability, and inexpensive. In addition, in the same manner as the combination of the apron feeder and the rotary valve, it is better to install a small chute 211 at the outlet of the roll feeder 217 to prevent the particulates from being caught in the rotary valve 11. .

As mentioned above, although this invention was demonstrated according to the Example, this invention is not limited only to these Examples, It will be clear that various changes are possible within the scope of the concept of this invention shown in a claim.

Claims (6)

A method of continuously discharging granular bodies in a vertical cooling furnace requiring airtightness, comprising: (a) continuously and quantitatively dispensing granular bodies in an atmosphere isolated from the lower part of the cooling chamber of the vertical cooling furnace 12 from the atmosphere; (B) receiving the particulates in a bucket of the rotor 13 of the rotary valve 11 installed in an airtight state in an atmosphere shielded from the atmosphere, and (c) the rotor 13 Particle discharge method of the airtight vertical cooling furnace, characterized in that configured to discharge the granular body of the bucket to the atmosphere by rotating. In the discharge device for continuously discharging the granular body in the atmosphere blocked from the air from the lower part of the cooling chamber of the granular body vertical cooling furnace that requires airtightness, the outlet (15) in the lower part of the granular body outlet (15) of the cooling chamber Airtight chambers 16, 116, and 216, which are installed to communicate with each other, and which have a supply port 20 for carrying out the granular body, and are installed in the airtight chambers 16, 116, and 216, respectively, Conveyers 17, 117 and 217 for continuously and quantitatively feeding from 150 to the supply port 20, and at least one granular bucket around the container, and the airtight chambers 16, 116 as the bucket rotates. And a rotary valve (11) having a rotor (13) rotatably installed so as to communicate in a hermetic state with the supply port (20) of 216, and an airtightness comprising: a driving device for rotating the rotor (13). Granular discharge device in vertical cooling furnace. The airtight vertical cooling furnace of claim 2, wherein the airtight chambers 116 and 216 are provided with limiting portions 111 and 211 for limiting the flow width of the granules sent to the supply port 20. Granular Discharge Device. 3. The particulate-form discharge apparatus of the airtight vertical cooling furnace according to claim 2, wherein the conveying apparatus is a vacuum supplier (17). The particulate-form discharge apparatus of the airtight vertical cooling furnace according to claim 2 or 3, wherein the conveying device is an apron feeder (117). 4. The particulate discharge device of the hermetic vertical cooling furnace according to claim 2 or 3, wherein the conveying device is a roll feeder (217).

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