JP2628259B2 - Cooling device for molten slag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for cooling molten slag of incombustibles such as dry sludge and wastes, which has been burned in a melting facility, and recovering the same as crystal slag.

[0002]

2. Description of the Related Art Conventionally, as this type of apparatus, as shown in FIG. 10, 40 to 70 cast steel dish-shaped containers A are mounted on an endless chain conveyor C, and a molten slag S is fed from a melting furnace F at one end. Are successively received in a container A, and cooled while being transferred to the other end, and the container A is inverted at the other end to take out crystallized slag, or as shown in FIG. A closed casing 1 is connected to a lower side of a drop Fa of the melting furnace F, and a hollow disk 2 supported by a vertical axis 3 composed of an inner and outer double pipe is rotatably disposed in the casing 1. Then, while feeding cooling water into the hollow disk 2 through the radiation pipe 4 so as to flow from the peripheral portion to the central portion, the hollow disk 2 is slowly rotated by the motor M, and the molten slag S Is dropped into the disk 2 Indirectly cooled and solidified so with crushed stone-like crystals slag and pears, such as this one turntable type as scraping by the scraper 5 to the discharge path 6 is known by the cooling water flowing.

[0003]

However, in the former conveyor type, not only is the separation of the slag from the container at the discharge position uncertain, but also the heat release in the atmosphere and the repair of parts. The whole equipment is exposed for the purpose of simplicity, and there is a problem in terms of work safety and environmental protection.On the other hand, the latter turntable type has a processing means covered with a casing, and the high heat of molten slag There is no risk of the exhaust gas leaking, and although it is efficient, sometimes the molten slag solidifies in a net shape with a spread on the disk, it may slip against the disk, the disk may run idle, and it may not be possible to discharge, In the latter case, the molten slag is only cooled indirectly and cannot be switched to a means for directly cooling it in a water tank or the like, and the crystallized slag is also exclusively crushed stone and sandy. , Not to meet the demand in this area.

Therefore, the present invention makes it possible to switch the cooling means of molten slag between indirect cooling and direct cooling with one apparatus,
An object of the present invention is to reliably discharge crystal slag, and to further ensure work safety and environmental protection.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided a cooling device for a molten slag, which is provided on a bottom wall of a casing connected to a lower side of a molten slag dropping opening of a melting furnace through an upper opening. A lower opening having substantially the same diameter as the upper opening and being aligned with the upper opening is provided, a water tank is continuously provided below the lower opening, and a hollow inner pipe and a plurality of radiation pipes are respectively provided inside the casing.
The longitudinal axis capable of introducing cooling water with a pump is located on both sides of the lower opening, and has a fan-shaped cutout having a radius that spans the lower opening and has a size that can partially expose the lower opening. The first turntable and the second turntable are arranged rotatably by providing a step on the top and bottom, and a scraper is arranged on the upper side of each turntable so as to be in contact with the turntable .
1st turntable and 2nd turntable
Part overlaps above the lower opening of the
Star when one turntable completely covers the lower opening
Rotate in opposite directions as
At the time of cooling, the first turntable and the second turntable
The lower opening of the casing with their sector cutouts.
It is characterized in that it is stopped and maintained in the state where it is put out .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1 to FIG.
Is a casing having a flat elliptical shape, and an upper opening 11c at the center of the upper wall 11a has a molten slag dropping port F at the tip of the melting furnace F.
a lower opening 11d having substantially the same diameter as the upper opening 11c is provided at the center of the bottom wall 11b in a line with the upper opening 11c, and a water cooling slag for producing water-cooled slag is provided below the opening 11d. A water tank 12 is provided in series, and a horizontally long pit-shaped collection chamber 1 is positioned below the bottom wall 11b behind the bottom wall 11b.
3 is provided, and the rear portion of the bottom wall 11b is inclined toward the collection chamber 13 as shown in FIG.

[0007] In the collection chamber 13, the spiral blade 1 is directed toward the center.
A screw shaft 14 equipped with a discharge shaft 4a is provided, and is rotated by a _third motor M3 on a driving frame 20.
Are connected to each other, and dampers 15a are provided in two stages in the discharge tube 15 so as not to emit the exhaust gas to the outside. But,
The method of setting the damper is an example and is not limited to this.

A first turntable 16 on the left and a second turntable 17 on the right have the same size inside the casing 11 (steps shown in FIG. 1 are higher on the left side and higher on the right side). And the central longitudinal axes 18, 19 thereof are in the lower opening 11d at the center of the bottom wall.
Are arranged on both sides of the
As shown in FIG. 2, the second turntables 16 and 17 each have a radius that straddles the lower opening 11d at the center of the bottom wall, and are partially provided in the circumferential direction when switching to direct cooling as described later. Fan-shaped cutouts 16 'and 17' (135-degree fan-shaped cutouts in the figure) are provided so as to expose the lower opening 11d from both sides to form an irregularly shaped disk.

Further, the first and second turntables 16, 1
7, upper plates 16a and 17 made of steel plates as shown in FIG.
a and the lower plates 16b, 17b are formed in a hollow and side convex shape, and the longitudinal axes 18, 19 integrated with the lower plates 16b, 17b are also made of a hollow pipe material and rotate the bottom wall 11b. It extends downward as much as possible, is pivotally supported by the drive frame 20, and has its lower end rotatably coupled to the rotary joints 21a and 21b, respectively, via the transmission gear G on the way, and the first motor M1 or the _first motor M1. 2 motor M
₂ , and these vertical axes 18, 1
A plurality of radiating pipes 16c and 17c are attached to the upper end of the turntables 16 and 17 in the circumferential direction, respectively.
a, 19a are disposed so as to vertically penetrate the vertical axes 18, 19, respectively. The upper ends of the openings protrude into the center of the turntables 16, 17 and the lower ends thereof are not connected to the rotary joints 21a, 21b, respectively. They are rotationally connected.

Then, the first and second turntables 1
The upper and lower plates 16a and 17a in the shape of upside down dishes 6 and 17 are
It is tilted so that it gradually rises from the surrounding part toward the center protrusion so that the air slag that causes distortion is not created inside and the overlying molten slag does not easily flow around. The upper and lower support plates 2 penetrate the side wall of the casing 11 above the upper plates 16a and 17a.
Scrapers 22a and 22b are elastically supported by the upper and lower plates 3a and 23b, respectively.
The lower surface of the first and second turntables 16 and 17 or the longitudinal axes 18 and 19 are provided for cleaning the slag that has fallen along the radial direction of the bottom wall 11b of the casing. The cleaning plates 24a and 24b are mounted as shown by the solid line or the dotted line in FIG. 3, but if the scale is small, the entire bottom wall 11b of the casing may be omitted by inclining it toward the collection chamber 13 side.

Further, the vertical axis 1 of the turntables 16 and 17
8 and 19 of the lower end and scrapers 22a, the inlet pipe L ₁ and the outlet pipe L of the cooling water for indirect cooling the outer end of the 22b
₂ are connected to each other, and the first turntable 16
A first motor M ₁ for driving the second motor M ₂ of the second turntable 17 for driving is connected to the controller, both tables 16 and 17 slowly in synchronization with the opposite arrow direction in FIG. 2 to each other rotation have been made to (min 0.5-2.5 rotation about) to, and a third motor M ₃ are screw shaft 1
The slag that enters the collection chamber 13 from the turntables 16 and 17 is controlled without delay by controlling the rotation of the rotary table 4.

When the molten slag is indirectly cooled and processed under the above configuration, the first turntable 16 and the second turntable 17 are connected to the lower opening 11 as shown in FIGS.
d, the first turntable 16 partially overlaps the lower opening 11d, and is disposed so as to completely cover the lower opening 11d.
This as the start position, the first motor M ₁ first
The turntable 16 clockwise, the second motor M ₂ rotates the second turntable 17 to the screw shaft 14 to a required by the third motor M ₃ causes slowly rotated counterclockwise, at the same respective inlet pipe L ₁ at the same time The cooling water is sent to the longitudinal axes 18, 19 and the scrapers 22a, 22b through the.

In this case, the first and second turntables 1
In 6 and 17, the cooling water that has risen in each of the vertical axes 18 and 19 passes through a plurality of radiation pipes 16c and 17c to the peripheral portion in each table, flows from there toward the center portion, and projects from the center. The internal pipe 18a
Enters into 19a, flows out from the outlet pipe L ₂ is lowered, but the upper plate 16a of the turntable 16, 17,
Since 17a is inclined upward in the center as described above, the air bubbles entrained in the cooling water flow to the center side together with the cooling water along each upper surface plate without accumulating inside, and the inner pipes 18a,
Go inside 19a.

Thus, the molten slag S such as sludge and waste melted in the melting furnace F first falls from the outlet Fa onto the upper plate 16a of the first turntable 16, and the starting position shown in FIG. When the turntables 16 and 17 are rotated by 90 ° from FIG. 5, the deposition range of the molten slag S is expanded only on the first turntable 16, and when rotated by 180 °, the deposition range becomes as shown in FIG. Is spread on the first turntable 16 and a part of the molten slag S falls on the second turntable 17.

Turning further from the state of FIG. 6 by 90 °, ie, 270 ° from the start position, results in FIG.
1st turntable 16 during rotation from 0 ° to 270 °
Moves away from the lower opening 11d, while the second turntable 17 covers the lower opening 11d, and the molten slag S falls exclusively on the second turntable 17, during which the first turn The molten slag S first dropped on the table 16 is indirectly cooled and solidified by the cooling water flowing in the table, becomes crushed crystal slag, is scraped off by the scraper 22a, and enters the collection chamber 13.

Further, the turntables 16 and 17 are 90 °
That is, when rotated 360 ° from the beginning, as shown in FIG. 8, the table returns to the initial position where a part of both tables overlap on the lower opening 11d, but the deposition range of the molten slag S is divided into both.

In the above process, if the molten slag S deposited on the first turntable 16 crystallizes without any problem, it is sequentially scraped off by the scraper 22a in the collecting chamber 13 as shown in FIG. When the slug S is solidified in the shape of a net and slips against the table as described above, the turntable 16 is provided with a fan-shaped cutout portion 16 'having a predetermined width, instead of the conventional circular shape. Then, the solidified slag is pushed by the scraper 22a to the side of the sector cutout 16 'opposite to the collection chamber 13 with the rotation of the table 16 as shown in FIG. It falls on the wall 11b and is put into the collecting chamber 13 by the cleaner plate 24a under the table. Such an operation is similarly obtained for the second turntable 17.

First and second turntables 1 as described above
Due to the continuous rotation of the slag 6, 17, the treatment by indirect cooling of the molten slag is advanced, and the crystal slag collected in the collection chamber 13 is carried out to the outside through the discharge tube 15 by the screw shaft 14, and the combustion exhaust gas in the furnace Is sent to a required place through the discharge passage Fb.

On the other hand, when the molten slag is directly cooled and treated, as shown in FIG. 9, the lower opening 11d on the bottom wall is cut into the fan-shaped cutouts 1 of the first and second turntables 16 and 17.
6 and 17 ', the both turntables 16 and 17 are stopped, and the molten slag S is dropped from the outlet Fa in this state.
Flows straight into the water tank 12 through the lower opening 11d,
It is cooled directly by the cooling water to form a sandy crystal slag,
It is appropriately removed by a required water-cooled slag scraping device (not shown) provided in the water tank 12.

The fan-shaped cutouts 16 'and 17' of each of the turntables 16 and 17 have lower openings 11d during indirect cooling.
As a means for completely exposing at the time of direct cooling without exposing any of the
It is desirable that the sector be smaller than °. on the other hand,
If the upper plates 16a and 17a of the turntables 16 and 17 are inclined upward toward the center as shown in the figure, there is an advantage that air bubbles are not formed inside the turntables. Absent. In the above example, the vertical axis 1
Although the motors 8 and 19 are driven by different motors, the motors may be driven by a single motor via a transmission mechanism.

[0021]

As described above, according to the present invention, since the cooling device for the molten slag of incombustibles in dried sludge and wastes has the above-described configuration, the indirect cooling means of the molten slag can be provided by one device. It is possible to easily switch to the direct cooling means at any time, to produce crystal slag according to the application, and even if the turntable runs idle during indirect cooling, the table can be cut through the fan cutout. The solidified slag on the bottom can be removed without fail, and can be discharged without interruption by the cleaner plate on the bottom wall. Continuous operation of the device is possible. Safety and environmental protection are ensured.

[Brief description of the drawings]

FIG. 1 is a partially cut front view of an embodiment of the present invention.

FIG. 2 is a partially cut front view taken along line XX of FIG. 1;

FIG. 3 is a partially cut-away side view taken along line YY of FIG. 2;

FIG. 4 is a plan view showing a state when two turntables are started.

FIG. 5 is a plan view showing a state where two turntables are rotated by 90 °.

FIG. 6 is a plan view showing a state where two turntables are rotated by 180 °.

FIG. 7 is a plan view showing a state in which two turntables rotate at 270 °.

FIG. 8 is a plan view showing a state where two turntables are rotated by 360 °.

FIG. 9 is a plan view showing a state in which a lower opening is exposed by two turntables.

FIG. 10 is a side view of a conventional apparatus of a chain conveyor type.

FIG. 11 is a partially cut front view of a turntable type conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Casing 11a Upper wall 11b Bottom wall 11c Upper opening 11d Lower opening 12 Water tank 13 Collection chamber 14 Screw shaft 15 Discharge cylinder 16 First turntable 16 'Sector cutout 17 Second turntable 17' Sector cutout 18 Vertical axis 18a Inner pipe 19 Vertical axis 19a Inner pipe 22a Scraper 22b Scraper 24a Cleaner plate 24b Cleaner plate F Melting furnace Fa Drop

Claims (2)

(57) [Claims] 1. A lower opening, which is substantially the same diameter as the upper opening and is aligned with the upper opening, is provided on a bottom wall of the casing connected to the lower side of the molten slag outlet of the melting furnace through the upper opening. A water tank is connected to the lower side of the section, and inside the casing, hollow and internal pipes and multiple radiation pipes are provided, and cooling water can be introduced.
A first turntable and a second turn, each having a fan-shaped cutout whose longitudinal axes are located on both sides of the lower opening, the radius of which spans the lower opening, and which partially exposes the lower opening. The table is arranged rotatably with steps on the top and bottom, and a scraper is placed in contact with the top of each turntable,
During indirect cooling of molten slag, the first turntable and
Two turntables are placed above the lower opening of the casing.
And the first turntable opens downward with some overlap
Opposing each other with the mouth completely covered as the start position
Direction, and during direct cooling, the first tar
And the second turntable, and their fan-sections
With the lower opening of the casing exposed at the
A molten slag cooling device characterized by being maintained . 2. The cooling device for molten slag according to claim 1, wherein a cleaner plate extending along the radial direction of the bottom wall is attached to the lower surfaces of the first and second turntables or their longitudinal axes.