JPS633645B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to granulation manufacturing equipment. It is known to produce granulated water using molten slag from a blast furnace as a raw material. One of these manufacturing methods is shown in FIG. 1, for example. That is, the slag ladle 1 is rotated to supply the molten slag 2 to the rotating drum 4 via the slag treatment chute 3 and scatter it. The slag (crushed water) 5 thus granulated falls into the cooling water of the collection pit 6, is cooled, and becomes granulated water. In addition, 7 is a conveyor for collecting and conveying granulated slag (hereinafter referred to as granulated slag), 8 is a storage hopper, 9 is a collection dome for collecting the scattered granulated slag 5, and 10 is a storage for cooling water. This is a circulation pit for cleaning. However, in this granulated water production equipment, the atmospheric temperature of the collection dome 9 and/or the temperature of the cooling water rises, making it difficult to maintain proper cooling capacity, which deteriorates the quality of the granulated water and causes the slag and steam to react. There was a problem in that the amount of hydrogen sulfide generated increased. This increase in the temperature of the cooling water cannot be avoided as long as a method of circulating the cooling water has to be adopted. That is, since the cooling water contains sulfur compounds, alkalis, etc. eluted from the granulated slag 5, direct discharge to the outside of the system may cause environmental problems. Therefore, the granulation production equipment is constructed so that the cooling water is always flowed sequentially into the circulation pits 10 and is circulated within the system of these pits. For this reason, in addition to the above-mentioned problems, the collection dome 9 may become deformed and thermally damaged during long-term use. Furthermore, the water level of the cooling water in the collection pit 6 is difficult to balance between the inside of the guide plate (the side where the conveyor 7 is located) and the outside, and this causes the granulated slag (crushed water) 5 to be transferred to the conveyor 7. This has a fatal drawback in terms of operation, as it flows out (leaks) and accumulates in the collection pit 6, causing the conveyor 7 to stop operating. This also causes problems such as a decrease in the production yield of granulated water and an inability to properly control the temperature of the cooling water in the collection pit. In order to solve the above problems, the present invention provides a collection dome so as to surround the collection pit in front of the rotating drum, and provides a water spray nozzle directed toward the ceiling and/or side wall of the dome. The lower end of the side wall is formed into a guide plate that is inclined toward the conveyor and has a water level adjustment port, and a water spray nozzle directed toward the guide plate is disposed, and a slit-shaped ventilation hole that opens in the vertical direction of the side wall is provided. It is an object of the present invention to provide a water granulation manufacturing equipment characterized by having a plurality of rows. Embodiments of the present invention will be described below with reference to the drawings. Fig. 2 is a plan view, Fig. 3 is a view taken along the line A-A in Fig. 2, Fig. 4 is a view taken along the line B-B in Fig. 3, and Fig. 5 is a view taken along the line C-C in Fig. 2. 6 are enlarged explanatory views of main parts. In the figure, 1 is a slag pan, 3 is a slag processing chute, 4 is a rotating drum, 6 is a collection pit, 7 is a conveyor, 8 is a storage hopper, 12 is a sedimentation treatment pit, 13 is an open groove, and is a sedimentation treatment pit. This is for guiding used cooling water from the collection pit 6 to 12. The settling pit 12 is constructed to be somewhat deep and cleans dust and other particles contained in the cooling water. Reference numeral 14 denotes a circulation pit following the precipitation treatment pit 12, and stores purified cooling water.
15 is a circulation pump for supplying purified cooling water to the circulation pit 14;
6 is a cooling water conduit. 9 is a collection dome;
It has an exhaust hole 17 and is arranged so as to generally surround the collection pit 6. As shown in FIG. 4, the collecting dome has a closed shape, the bottom part of which is immersed in a collecting pit 6, an open area 30 is formed, and a conveyor 7 is attached to the open area 30. Further, a guide plate 22 is provided continuously on the side wall 19 of the collection dome 9. The collection dome 9 is provided with a water spray nozzle 20 directed toward the ceiling 18 and/or side wall 19,
In addition, a plurality of rows of slit-shaped ventilation holes 21 are provided in the side wall 19. As a result, the cooling water supplied from the circulation pump 15 passes through the cooling water conduit 16 and from the water spray nozzle 20 forms a water film on the working surface of the ceiling 18 and/or side wall 19, wetting the working surface and capturing it. It reaches the collection pit 6. When the cooling water forms a water film on the working surface of the side wall 19, a plurality of rows of slit-shaped ventilation holes 21
Since the cooling water is passed through the atmosphere, the cooling water reaches the collection pit 6 while being maintained at an appropriate temperature. Based on this, the cooling ability of the cooling water is always maintained, so that high-quality granulated water can be produced. Further, even if the granulated slag 5-1 scattered by the rotating drum 4 adheres to the ceiling 18 and side walls 19, it is washed away by the flowing cooling water while forming a water film, and can be easily collected in the collecting pit 6. Furthermore, multiple rows of slit-shaped ventilation holes 21 are provided in the side wall 19 of the collection dome 9.
The exhaust hole 17 allows the atmosphere inside the collection dome 9 to pass through, and the exhaust hole 17 exhausts the atmosphere inside the collection dome 9 to the atmosphere. As a result, the atmospheric temperature inside the collection dome 9 is
It is possible to maintain the target temperature and also prevent the temperature of the cooling water from rising. Reference numeral 22 denotes a guide plate that serves to guide the crushed water to the conveyor 7, and is inclined toward the conveyor 7 from the lower end of the side wall 19 of the collection dome 9. Then guide plate 2
A water level adjustment port 23 is provided at the appropriate position of No. 2, and a water spray nozzle 20-2 directed toward the guide plate 22 is provided. There are no particular restrictions on the structure of the water level adjustment port 23, and it may have the structure shown in an enlarged view in FIG. 6, for example. In the figure, 24 is a granulated water leakage suppression plate, 25
26 indicates a mounting member, and 26 indicates a cooling water inlet. In this way, the guide plate 22 is inclined in the direction of the conveyor 7 and has the water nozzle 20-2 directed toward the guide plate 22, so that the granulated water 5-2 can be easily guided to the conveyor 7. It is possible to improve the collection rate. In addition, since the water level adjustment port 23 is provided at the appropriate position of the guide plate 22, the water level H on the inside (the side where the conveyor 7 is present) and the water level h on the outside of the guide plate 22 illustrated in FIG. 5 are selected. H=h, H<
It can be adjusted to h or H>h. That is, when H=h, the water pressures in the H and h sections are balanced, so that no slag flows out to the collection bit. When H<h, the water pressure in the h section becomes high and the cooling water flows toward the H section, so that slag does not flow out from the l section in Fig. 5. In addition, when H > h, as shown in Figure 2, the water pressure in the H section increases and the cooling water reaches h
Since the slag flows toward the 1 section, slag flows out from the 1 section. Therefore, in normal operation, by adjusting the water level in the direction of H=h or H<h, it is possible to suppress leakage (outflow) from the distance l between the guide plate 22 and the conveyor 7, and directly below the conveyor 7. There is no possibility that the conveyor 7 will stop operating due to accumulation in the surrounding area, and the collection rate can also be improved. To properly adjust the water level H and h mentioned above,
For example, multiple water level adjustment ports 23 provided on the guide plate 22
This can be dealt with by adjusting the opening or closing it appropriately. Now, in order to manufacture granulated water using this granulated water production equipment 30, the following procedure is performed. The slag ladle 1 is rotated to spread the molten slag 2 to a slag treatment chute 3 while guiding it to a rotating drum 4 and scattering it. As a result, the collection dome 9 is granulated.
Some of it falls into the water of the collection pit 6, and the other part hits the ceiling 18 and side wall 1 of the collection dome 9.
However, as described above, it is washed away with cooling water that maintains its cooling ability, and falls into the water in the collection pit 6, where it is cooled. In particular, the water spray nozzle 20-2 directed toward the guide plate 22 guides the granular slag 5 to the conveyor 7 and facilitates its collection. The conveyor 7 conveys the granulated water 5-2 remaining in the water to the storage hopper 8 to produce a granulated product. The cooling water in the collection pit 6 passes through the open groove 13 and reaches the precipitation treatment pit 12, and the purified cooling water flows into the circulation pit 14 and is sequentially circulated within the above-mentioned system. At this time, inside the collection dome 9, there are a slit-shaped ventilation hole 21, an exhaust hole 17, and a water spray nozzle 2.
Since the atmospheric temperature is maintained appropriately through interactions such as the formation of a water film by the cooling water on the ceiling 18 and/or side walls 19, the cooling water temperature in the collection pit 6 is also maintained appropriately. Contributes to improving the quality of granulated water. As described above, the present invention provides the collection dome 9 so as to generally surround the rotating drum 4 and the collection pit 6, and the water spray nozzle 20 directed toward the ceiling 18 and/or side wall 19 of the dome 9. , the lower end of the side wall 19 of the dome 9 is inclined in the direction of the conveyor 7, formed into a guide plate 22 having a water level adjustment port 23, and is provided with a water spray nozzle 20-2 directed toward the guide plate 22; By providing a plurality of rows of slit-shaped ventilation holes 21 opening in the vertical direction of the side wall 19, the effects shown in Table 1 below can be obtained.

[Table] Figure 7 also shows the temperature of the cooling water in the collection pit. The solid line represents the example of the present invention, and the dotted line represents the conventional example. As is clear from this figure, it can be seen that the granulated water manufacturing equipment according to the present invention maintains an appropriate temperature that affects the quality of granulated water and the generation of hydrogen sulfide. As described above, the present invention exhibits remarkable effects that cannot be obtained with conventional water granulation production equipment.

[Brief explanation of the drawing]

FIG. 1 is an overall schematic diagram of a conventional granulated water production facility, FIG. 2 is a plan view of a granulated water production facility according to the present invention, and FIG.
The figure is the A-A arrow view in Figure 2, and Figure 4 is B in Figure 3.
-B arrow view, Figure 5 is a C-C arrow view in Figure 2, Figure 6 is an enlarged perspective view of the main part of Figure 5, Figure 7 is the atmospheric temperature inside the collection dome, and the collection pit. 3 is a graph showing the temperature of cooling water in the interior of the vehicle. 1... Slag pot, 2... Molten slag, 3... Slag processing chute, 4... Rotating drum, 5... Granulated slag (crushed water), 6... Collection pit, 7... Conveyor, 8... Storage hopper, 9... Collection dome,
11... Auxiliary guide plate, 12... Sedimentation treatment pit, 13... Open groove, 14... Circulation pit, 15...
... Circulation pump, 16 ... Cooling water conduit, 17 ... Exhaust hole, 18 ... Ceiling, 19 ... Side wall, 20 ... Water nozzle, 21 ... Slit-shaped ventilation hole, 22 ...
... Guide plate, 23 ... Water level adjustment port, 24 ... Granule leakage suppression plate, 25 ... Mounting member, 26 ... Cooling water inlet, 30 ... Granule manufacturing equipment.

Claims (1)

[Claims] 1 In a granulated slag production facility that scatters molten slag with a rotating drum and collects the granular slag in a collection pit, a closed collection dome surrounding the collection pit is provided, and the bottom of the dome is collected. The dome is immersed in a pit to form an opening area, a conveyor is attached to the opening area, a water spray nozzle is provided pointing toward the ceiling and/or side wall of the dome, and the lower end of the side wall of the dome is inclined toward the conveyor. formed into a guide plate to
A water spray nozzle directed toward the guide plate is provided, a water level adjustment port whose opening degree can be adjusted is provided in the guide plate, and a plurality of rows of slit-shaped ventilation holes opening in the vertical direction of the side wall are provided. Water granulation manufacturing equipment featuring: