JPS5921986A - Wool removing structure of device for recovering heat of granular slag - 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 The present invention relates to an apparatus for recovering heat from molten slag, which is recovered as air.

Conventionally, many of the apparatuses for recovering high heat from molten slag convert the bath molten slag into fine branched solids, such as the one shown in FIG. 1.

In this device, a part of the molten slag that has been τA from the molten slag outlet 2 is flown into the air chamber 1 by the air nozzle 3 for atomization, and the successful and failed slag particles 4 are After colliding directly or colliding with the collision wall 5, the particles fall onto the grain receiver surface outlet 6 and reach the grain receiver surface outlet 7, the grain receiver long hole plate 8, and the slag particle discharge L-19. The temperature drops to a predetermined temperature through heat exchange with the air, and the slag particles are transported to a predetermined location by the slag particle transport device.

On the other hand, air flows in from the lower part of the perforated plate 8 in the grain receiving part, passes through the perforated plate 6 in the grain receiving part, and further in the airtight chamber, becomes high temperature air through heat exchange with the slag grains, and removes slag wool [11] The air is led to the boiler] 3 through the exhaust port 12, where its heat is recovered, and used again as low-temperature air via the circulation blower 14.

This conventional method has the following drawbacks. That is, the slag grains that have reached the perforated plate 8 of the grain receiving part are mixed with slag wool that has passed through the overflow section 7 of the grain receiving part, and is entrained in the air on the outlet side of the long perforated grain receiving part plate 8. There are many things that are done. For this reason, if air is allowed to flow into the perforated plate 6 of the grain receiving part as it is,
The entrained slag wool causes blockage of the perforated plate, resulting in the suspension of operation.

The present invention eliminates the above-mentioned drawbacks of the conventional system and provides a heat recovery device from molten slag that is capable of stable operation.

That is, the gist of the present invention is that the present invention has a molten slag granulation machine and a lower part of a multi-stage grain receiving layer provided in an airtight chamber equipped with a collision wall that causes at least a part of the granular slag to collide with an airtight wall surface. In a heat recovery device that supplies cooled sludge to a high temperature state through heat exchange with slag particles and takes it out, a wool removal filter is installed between the lower perforated granule layer plate and the upper perforated granule layer plate. It is in.

Furthermore, another feature of the present invention is that a cooling gas passage port is provided between the lower perforated grain receiving layer plate and the second perforated grain receiving layer plate.

A wool removal filter having an area at least twice the cross-sectional area of the wool filter is movably installed.

Hereinafter, the heat recovery device according to the present invention will be described in detail based on embodiments.

In FIG. 2, a wool removal device 16 is provided between the lower grain receiving long-hole plate and the upper grain receiving perforated plate, and wool entrained in the air is removed in this portion. The main body of the wool removing device is made entirely of mesh as shown in FIG. 3, and the number of openings must be appropriately selected depending on the properties of the wool mixed in, but one example is about 4 openings.

The wool removed from the air is taken out and removed together with the wire mesh at regular intervals. Depending on the amount of wool generated and the length of continuous operation, it may be necessary to remove the collected wool from the wire mesh surface during continuous operation, and FIG. 4 shows one example of this.

This figure shows the intermediate cross section of the grain receiving part in Figure 2.
Ru.

In FIG. 4, the wool removal filter provided between the lower particle receiving long-hole plate 8 and the upper particle receiving perforated plate 6 is usually made of a full mesh and has an area at least twice the cross section of the cooling air passage. is installed. A wool outlet box 16-7 is provided on both sides of the cooling air passage section, and a filter drive device 16-2, 16-2' is further installed outside the box 16-7. The main body of the filter is moved by the guide rail 16 by the drive device.
-3 to the left or right at regular intervals,
There are two scrapers on each side, one on the right and one on the left, in contact with the filter collection surface. On the top side of the filter, there are two sealing plates (on both sides) that seal between the cooling air passage and the wool escape box. It is a popper 16-6 that can store .

That is, between the lower grain receiving long hole plate 8 and the upper grain receiving part porous plate 6, there is a wool removing device main filter part 16-1,
Usually about 1/2 of it is used for wool removal. The remaining 1/2 is located in the wool evacuation box 6-7, which is located away from the air passage, and is on standby. Assuming that the required amount of collected material in a part of the filter currently in use has reached a certain level, the filter is moved to the left in the figure by the filter drive device 16-2', and the collected wool is Scraped away by scraper 16-4, Hola ξ-16
-6 is stored. At the same time, a new filter, which has been waiting until now, is installed between the air passages and continues to remove wool from the air. Repeat this below. In this way, the heat recovery device can always have a stable wool removal ability even during continuous operation.

Although FIG. 4 of this embodiment shows a reciprocating type filter, it is also possible to use two stages of filters alternately.

An example is shown in FIG. As shown in the figure, the main filter parts 16-1 each have an auxiliary belt 16-8, and can be moved back and forth from side to side in the drawing by a drive device 16-2. By providing scrapers 16-4 above and below, the filter can be regenerated and continuous operation can be performed.

FIG. 6 shows another embodiment of the present invention of an endless belt type. The main filter 16-1 has an endless configuration and is driven in a fixed direction by a driving roller 16-2.

As described above, the present invention introduces a wool removal mechanism into the airtight chamber of the granular slag heat recovery device, which is effective in preventing clogging of the perforated plate, and enables connected operation of the device, which has great industrial effects.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of a conventional example of a molten slag heat recovery device;
The figure is an explanatory diagram of the molten slag heat recovery apparatus of the present invention, FIG. 3 is a detailed explanatory diagram of the present invention, FIG. 4 is a detailed explanatory diagram of the present invention, and FIGS. It is an explanatory view of an example of. l: Airtight chamber 2 Slag nozzle 3: Air nozzle 4. Flying slag grains 5: Collision wall 6: Grain receiver perforated plate 7: Grain receiver overflow port 8. Grain receiver perforated plate 9 Varnish slag grain discharge port 10 Varnish slag grain conveyor 11; Slag wool remover 12: Exhaust port 13: Boiler] 4: Circulation blower 15: Water supply pump +6-1:
Main body filter part 16-2', 16-2: Drive device 16-3 Ni guide rail 16-4 Varnish scraper 16-5: Seal plate +6-6: Hopper 16
-7: Wool escape box Figure 3 (C1) Cb) t^ Beam Figure 4

Claims (1)

[Claims] 1. Has a mechanism for refining molten slag, and reduces the amount of granular slag (
Cooling gas is supplied from the lower part of a multi-stage particle receiving layer provided in an airtight chamber equipped with a collision wall that partially collides with the wall surface of the airtight chamber,
A heat recovery device for recovering heat from slag particles in a high temperature state through heat exchange with slag particles, characterized in that a wool removal filter is installed between a lower perforated granule layer plate and an upper perforated granule layer plate. Wool removal structure of the device. 2. Provide a collision wall that improves the molten slag grain refinement mechanism and causes at least a portion of the granular slag to collide with the wall surface of the airtight chamber. Cooling gas is supplied from the lower part of the multi-stage grain receiving layer provided in the airtight chamber, It is brought to a high temperature state by heat exchange with slag particles and taken out 1-
In the heat recovery device 6, a cooling gas is passed between the perforated plate of the lower granule receiving layer and the perforated plate of the upper granule receiving layer, and 1tUi +
(A wool removal structure for a granular slag heat recovery device, characterized in that a wool removal filter having a product of 1 Oi, which is at least twice the product of U, is movably installed.