JPH0237284A - Sintering material cooling device - Google Patents

Abstract

PURPOSE:To uniformly cool the sintering material crosswise carried on the cooling machine by disposing partitions in the hood above the trough discharge end so as to demarcate the space above the sintering material carried on the trough into a plurality of sections, and disposing an air flow regulating damper at the top of the partitions as well as a thermometer in the sectioned space between the partitions. CONSTITUTION:In a suction type sintering material cooling device, two to four partitions 7 are disposed in the upper hood 2 above the trough 5 to demarcate the upper hood into three to five sections crosswise. Further, a regulating damper 8 is disposed at the top of the partitions 7 to regulate the air delivery rate, and a thermometer 9 is disposed in the respective sectioned spaces 14 to measure the delivered air temperature. By controlling the regulating dampers 8 so that the measured delivered air temperature may be uniform crosswise, the cooling rate of the sintering material 6 in the trough can be made uniform crosswise.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a sintered ore cooling device, and particularly to a sintered ore cooling device that can uniformly cool sintered ore in the width direction of the cooler. It is related to the device.

<Prior art> In a sinter cooler, the red-hot sintered ore cake discharged from the sintering machine is crushed into particles with a particle size of 150 to 200++n or less using a crusher, and then the crushed sintered ore is conveyed and crushed by air. It is cooled down to below 120°C, which allows it to be transported on the downstream belt conveyor.

That is, as shown in FIGS. 5 and 6, the crushed red-hot sintered ore 6 is placed in the trough 5 of the cooler 1 for a distance of 900 to 1400 m+.
The sintered ore 6 is placed on the trough 5 at a height of
The heat is exchanged with the air, and the heat is dissipated into the atmosphere through the exhaust stack 4.

The UF4 node of the air volume required for this cooling is a means for measuring the temperature of the exhaust stack 4 or the surface temperature of the sintered ore 5, and controlling the rotation speed of the cooling fan based on these temperatures, JP-A No. 4L-597
As disclosed in Japanese Patent No. 09, means for making the blades of a cooling fan variable or changing the number of operating cooling fans are well known.

In addition, Japanese Patent Application Laid-open No. 109416/1983 is used for a sintered ore cooling device.

As disclosed in JP-A-55-6462 and JP-A-55-72781, technology has been established to adjust the air volume in the longitudinal direction of the cooler by recovering heat from the exhaust gas in the high-temperature section. has been done.

Japanese Patent Laid-Open No. 5777885, Japanese Patent Laid-Open No. 5134143, and Japanese Patent Laid-Open No. 58-34144 have proposed methods for separately controlling high-temperature exhaust from the center of the trough of a cooler and low-temperature exhaust from the side edges. The purpose is to prevent the temperature from dropping due to air entering through the gap between the fixedly placed upper hood and the trough loaded with sintered ore.
The technology to adjust the cooling efficiency in the width direction of the machine has not yet been established.

As for the push-in type cooler, as disclosed in Japanese Patent Application Laid-Open No. 4959708, it has been proposed that a rectifying plate is arranged in the push-in wind box section at the bottom of the trough to straighten the air from the push-in cooling fan. However, the amount of cooling air passing through is determined by the porosity of the sintered ore filled in the trough, and sufficient control in the width direction cannot be achieved using only the current plate on the pushing side.

<Problem to be solved by the invention> The sintered ore cooler cools red-hot sintered ore of 150 to 200 m1 or less, and because the particle size distribution is wide, the filling state inside the cooler changes. . Therefore, since the pressure loss of the sintered ore packed bed changes, the amount of air passing through the sintered ore changes, and the temperature of the sintered ore discharged from the cooler differs depending on the location.

The longitudinal direction of the cooler can be adjusted by adjusting the cooling air volume as described above, but there is no adjustment in the width direction, and the width is 30 to 50°C.
Because the sintered ore is discharged at uneven temperatures with a temperature difference of 1,000,000,000,000,000 yen, some sintered ores have a temperature higher than a predetermined temperature, which causes subsequent sintering accidents on the transport belt conveyor and shortened belt conveyor life. Furthermore, in order to prevent these problems, a larger amount of cooling air than necessary is used as a whole, resulting in a waste of energy.

An object of the present invention is to solve the above-mentioned problems of the prior art and to cool sintered ore loaded on a cooler uniformly in the width direction.

Means for Solving the Problems> The sintered ore cooling device of the present invention to achieve the above objects has the following features:
A sintered ore cooling system consisting of a trough for transporting sintered ore, a plurality of upper hoods that partition the upper part of the trough in the direction of trough movement, and a suction fan installed in an exhaust pipe communicating with the outlet of the upper hood. In the apparatus, a partition wall is provided in the upper hood at least on the trough discharge end side among the plurality of upper hoods to divide the space above the loaded sintered ore in the trough into a plurality of parts in the width direction, and an upper end of the partition wall is provided. The present invention is characterized in that an air volume adjustment damper that can be operated in tZ motion is provided in the airflow control device, and a thermometer is provided in each ventilation path formed by the partition wall.

Further, the sintered ore cooling equipment of the present invention includes a trough for transporting sintered ore, a plurality of upper hoods that partition the upper part of the trough in the trough traveling direction, and a plurality of upper hoods that partition the lower part of the trough in the trough traveling direction. In a sintered ore cooling device comprising a plurality of wind boxes corresponding to the upper hood at the center of the trough and a push-in fan disposed in a duct communicating with the inlet of the wind box, one of the plurality of wind boxes is In both cases, a partition wall is provided in the wind box on the trough discharge end side to divide the space below the loaded sintered ore of the trough into a plurality of sections in the width direction, and a swing-operable wind Wk adjustment damper is provided at the lower end of the partition wall. and a thermometer is provided in the upper hood above the trough corresponding to each ventilation passage formed by the partition wall.

Hereinafter, the configuration of the present invention will be explained along with its operation based on the drawings.

FIG. 1 is a schematic cross-sectional view in the width direction of the suction type sintered ore cooling device of the present invention. In FIG. A partition wall 7 is provided to divide the ventilation path of the upper hood 2 into 3 to 5 sections in the width direction. Furthermore, the amount of air is discharged from the upper end of the partition wall 7! An adjustment damper 8 is installed for the 11 sections, and a thermometer 9 is installed in each passage 14 to measure the exhaust air temperature.

The cooling rate of the sintered ore 6 in the trough 5 in the width direction is made uniform by controlling the 1111ff damper 8 so that the measured wind temperatures are uniform in the width direction.

FIG. 2 is a schematic diagram showing a cross section in the width direction of the push type sinter cooling device of the present invention. In FIG. 2, a wind box 12 is installed below the trough 5, and two to Four partition walls 7 are provided to divide the ventilation path 14 of the wind box 12 into 3 to 5 sections in the width direction. Furthermore, the amount of air blown at the bottom end of each partition wall 7! A damper 8 for making 11 sections is installed, and a thermometer 9 is provided inside the upper hood 2 corresponding to each ventilation path 14 formed by the partition wall 7 to measure the temperature of the draft.

11 inside the wind box 12 so that the wind temperature inside the upper hood 2 measured in this way is uniform in the width direction.
By adjusting the knot damper 8, the cooling rate of the sintered ore 6 loaded in the trough 5 in the width direction is made uniform.

Regardless of whether the ventilation method is the suction type shown in Figure 1 or the forced type shown in Figure 2, the function of the sintered ore cooling device according to the present invention remains the same, and sintered ore can be efficiently and uniformly cooled. It is.

Although the partition wall may be installed in each upper hood or each wind box, it is necessary to install it at least in the upper hood or wind box at the hood discharge end. Control n provided in each hood or each wind box
This method achieves control of the amount of heat recovery and uniformity of the temperature in the width direction of the sintered ore discharged from the trough discharge end, and is not controlled by providing a partition wall only in the upper hood or wind box at the discharge end. The temperature in the width direction of the sintered ore discharged from the trough discharge end is made uniform.

<Example> Hereinafter, one example suitable for the present invention will be described based on the drawings.

In FIG. 3, high-temperature sintered t6 crushed from a sintering machine (path shown) is loaded into a cooler l via shoe meshes 3. Since the sintered ore loaded in the cooling if is high temperature, the front half of the cooler is used as a heat recovery zone, and the high temperature gas collected in the two upper hoods on the charging end side of the five upper hoods 2 is
m to recover heat.

That is, the high-temperature circulating gas collected in the upper hood on the charging end side is heat-recovered by the heat recovery boiler 11, and then the low-temperature circulating gas is sent to the second boiler from the charging end side via the circulation fan 10. The sintered ore is introduced into the wind box 12, and the sintered ore in the trough 5 is cooled by heat exchange. The circulating gas collected in the upper hood 2 is further introduced into the wind box 12 on the charging end side via the circulation fan lO', where it exchanges heat with the sintered ore in the trough 5, and then is circulated to the heat recovery boiler 11. .

In addition, since the temperature of the sintered ore in the trough 5 is lowered by the circulating gas in the first half of the cooler 1, the temperature of the sintered ore in the trough 5 is lowered by the circulating gas in the first half, so the air collected in the three upper hoods 2 after the middle part is Not used for heat recovery.

That is, the exhaust pipes 4 of the three upper hoods 2 after the middle part
A suction type cooling fan 3 is provided inside the trough 5, and the cooling fan 3 sucks air into the trough 5 to cool the sintered ore, and the sintered ore discharged from the cooler 1 can be conveyed by a belt conveyor 120. ``Cool down to below C.

As shown in FIG. 4, the sintered ore 6 with a height of 900 to 1400 mm is loaded in the trough 5. A ventilation plate 12 that allows ventilation is provided on the lower surface of the trough. On the other hand, three partition walls 7 are arranged in the three upper hoods 2 after the middle part to form four ventilation passages 14 divided in the width direction.

As shown by the dotted line at the upper end of each partition wall 7, an air volume f1 node damper 8 that can be tilted in the width direction is provided. It is designed to adjust the scenery passing through 14.

In addition, one thermometer 9 is arranged in each ventilation passage 14 (4 in total).
The temperature of the air passing through the ventilation passage 14 is measured.

In the above configuration, by operating the cooling fan 3, air is sucked through the opening of the ventilation plate 12 of the trough 5, and after removing heat from the sintered ore 6 in the trough 5, the upper hood 2
The air is radiated into the atmosphere from the exhaust pipe 4 through four ventilation passages 14 separated by a partition wall 7.

At this time, the amount of air passing through the ventilation path 14 is controlled by controlling the tilt angle of the 111-node damper 8 so that the temperature measured at each of the four points with the thermometer 9 installed in each ventilation path 14 is constant. is adjusted. Note that the capacity of the cooler 1 in the cooling zone is determined by adjusting the rotation speed of the cooling fan 3.

According to the present invention having the above configuration, the temperature difference in the width direction of the sintered ore discharged from the cooler 1 can be reduced by 10 as shown in FIG.
It can be suppressed within ℃. On the other hand, in the conventional example in which no partition wall is provided in the upper hood and no air volume adjustment damper is provided, the temperature difference in the sintered ore in the width direction is 30 to 50°C, as shown in Figure 8. The temperature difference in the direction is large.

In the above embodiment, the first half of the cooler is used as a heat recovery zone, and the middle and later parts are used as a cooling zone, and the present invention is applied to the upper hood of this cooling zone. However, the entire area of the cooler can be used as a cooling zone. , it is also possible to apply the present invention.

<Effects of the Invention> According to the present invention, sintered ore can be efficiently and uniformly cooled, so that there is no wastage of cooling air volume, and power costs can be reduced. In addition, the uniform cooling of the sintered ore reduces the heat load on the following belt conveyor, extending its service life. It also eliminates belt burn-out accidents, which reduces repair costs or reduces belt burn-out costs by replacing the belt. Great effects such as less reduction in the amount of concretion produced can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a cross section in the width direction of a suction type sinter cooling device according to the present invention, FIG. 2 is a schematic diagram showing a width direction of a push type sinter cooling device according to the present invention, and FIG. A schematic front view of a sintered ore cooling device according to an embodiment of the invention, FIG. 4 is a schematic diagram showing a cross section taken along the line A-A in FIG. 3, and FIG. 5 is a front view of a sintered ore cooling device according to a conventional example. Schematic diagram, FIG. 6 is a schematic diagram showing a cross section taken along the line B-B in FIG. 5, FIG. 7 is a graph showing the sintered ore temperature in the width direction of the cooler of the present invention, and FIG. It is a graph showing sintered ore temperature in the machine width direction. 11... Heat recovery boiler, 12... Wind box, 13... Chute, 14... Ventilation duct. l... Cooler, 3... Cooling fan, 5... Trough, 7... Partition wall, 9... Thermometer, 2... Upper hood, 4... Exhaust pipe, 6... ...Sintered ore, 8...Air volume adjustment damper, 10, 10'...Circulation fan, Fig. 1 Fig. 2 Fig. fig. Figure: Hikibu Kinshio Kaname Shinto 1st Lieutenant Wall

Claims (1)

[Claims] 1. A trough for transporting sintered ore, a plurality of upper hoods that partition the upper part of the trough in the trough traveling direction, and a suction type disposed in an exhaust pipe communicating with the outlet of the upper hood. In the sintered ore cooling device comprising a fan, at least a partition wall is provided in the upper hood on the trough discharge end side of the plurality of upper hoods to divide the space above the loaded sintered ore in the trough into a plurality of parts in the width direction. A sintered ore cooling device characterized in that a swingable air volume adjusting damper is provided at the upper end of the partition wall, and a thermometer is provided in each ventilation passage formed by the partition wall. 2. A trough for transporting sinter, a plurality of upper hoods that partition the upper part of the trough in the trough traveling direction, and a plurality of upper hoods corresponding to the upper hoods above the trough that partition the lower part of the trough in the trough traveling direction. In a sintered ore cooling device comprising a wind box and a push-in fan disposed in a duct communicating with an inlet of the wind box, at least one of the plurality of wind boxes is provided with the trough in the wind box on the trough discharge end side. A partition wall is provided that divides the space below the loaded sintered ore into a plurality of parts in the width direction, and a swingable air volume adjustment damper is provided at the lower end of the partition wall, and each ventilation path formed by the partition wall is A sintered ore cooling device characterized in that a thermometer is provided in an upper hood above the corresponding trough.