JPH0324593Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to improving a sintered ore cooler, particularly a circular hopper type cooler, from the viewpoint of recovering sensible heat from sintered ore.

(Prior Art) A conventional circular hopper type cooler for recovering sensible heat from sintered ore has a structure as seen in Japanese Patent Laid-Open No. 57-63646. That is, as shown in Figure 2,
Circular hopper 0 fixed on rotary table 01
2, high-temperature sintered ore is charged sequentially from above.
3 is cooled by an air flow 04 drawn from the atmosphere side, and is discharged by an ore discharge device 020 installed at the bottom of the circular hopper 02.

Incidentally, in the upper part of the hopper 02, the sintered ore is in a high temperature state, so the airflow 05 passing through the upper sintered ore 03 layer is heated to a high temperature and flows into the hood 07 above the hopper 02 as a high-temperature airflow 06. After the air is collected, it is introduced into the boiler 09 through the duct 08, where it exchanges heat with water, and then the blower 0
10 and then dissipated into the atmosphere. On the other hand, since the air flow that has passed through the sintered ore 03 layer at the bottom of the hopper 02 is at a low temperature, it is passed through the duct 011 as a low temperature air flow g.
It is extracted separately from the high-temperature air stream 06 and released into the atmosphere via a blower 013.

However, in such a hopper structure, as in air flow 014, high-temperature airflow mixes with the airflow in the low-temperature part, or conversely, airflow in the low-temperature part mixes with the airflow in the high-temperature part. However, there is a drawback that the temperature of the high-temperature airflow that has been obtained is lowered, that is, it is not possible to efficiently obtain exhaust air at a desired temperature.

(Problems to be Solved by the Invention) The present invention is provided in order to eliminate such drawbacks of the conventional method.A buffer zone is provided midway in the height direction of the circular hopper to prevent air flow. The temperature of the resulting exhaust air can be completely separated into a high temperature part and a low temperature part.

(Means for Solving the Problems) The present invention provides a circular hopper type cooler having an opening through which gas can flow in the hopper wall, and a wall without a passageway is provided between an upper passageway and a lower passageway; The present invention also relates to a circular hopper cooler characterized in that the wall height is 0.3 times or more the hopper cross-sectional thickness.

(Function) The details of the present invention will be explained below with reference to FIG.

1 is a circular hopper fixed to a rotary table 2. This rotary table 2 is rotated by a rotation mechanism consisting of a truck 3 and rails 4. Reference numeral 5 denotes a partition wall forming a buffer zone 6 facing the upper and lower parts of the hopper 1. Further, 7 is a hood provided above the hopper 1. Reference numeral 8 denotes a louver for allowing cooling air to flow in without spilling the sintered ore 9 in the hopper 1 outside the hopper 1 and for guiding exhaust air.

With such a structure, high temperature exhaust gas can be efficiently obtained. That is, the air flow 10 blown into the upper part of the circular hopper 1 reliably passes through the high-temperature sintered ore layer above the hopper 1 and becomes a high-temperature exhaust air flow 11, so that after being collected by the duct 12, it is sent to the boiler ( (not shown) can provide a heat source that produces high quality steam.

In addition, in order to obtain the high-temperature exhaust air flow 11, the sintered ore 9 is not cooled down to a low temperature by passing only through the upper layer of the hopper 1, so it is difficult to handle the sintered ore 9.
Must be cooled to below 100°C. For this reason,
A ventilation louver 8 is also provided at the bottom of the hopper 1, and a cold air flow 13 is blown into the hopper 1 to further cool the sintered ore 9. The exhaust air flow 14 obtained from the lower part of the hopper 1 is of course at a low temperature and is therefore radiated into the atmosphere.

What is important here is the height H of the partition wall 5 for forming the buffer zone 6. As mentioned above, the role of this buffer zone 6 is to suppress the flow of air between the high temperature zone 15 and the low temperature zone 16, so the height H
must be set based on the distance W between both partition walls. Therefore, the present inventors experimentally determined that when H/W is 0.3 or more, the high temperature zone 15 and the low temperature zone 16 are lower than the conventional cooler shown in FIG.
It was found that the amount of mixing between both zones was reduced to about 1/2 or less, and the resulting exhaust air temperature in the high temperature section was also higher than the desired 300°C.

(Effect of the invention) According to the invention, by providing a buffer zone midway in the height direction of the circular hopper where no air flows, the temperature of the resulting exhaust air is completely separated into high temperature and low temperature areas. This makes it possible to efficiently obtain high-temperature exhaust gas.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a circular hopper type cooler with exhaust heat recovery according to the present invention, and FIG. 2 is a diagram showing the concept of a conventional circular hopper type cooler. Each symbol in the figure is as follows. 1: Circular hopper, 2: Rotating table, 3: Dolly, 4: Rail, 5: Partition wall, 6: Buffer strip, 7: Hood, 8: Louver, 9: Sintered ore, 10: Air flow, 11: Exhaust air flow , 12: Duct, 13: Cold air flow, 14: Exhaust air flow, 15: High temperature zone, 16: Low temperature zone, 01: Rotary table, 02: Circular hopper, 03: Sintered ore, 0
4: Air flow, 05: Air flow, 06: High temperature air flow,
07: Hood, 08: Duct, 09: Boiler, 0
10: Blower, 011: Duct, 013: Blower, 014: Air flow, 020: Mine removal device.

Claims (1)

[Scope of utility model registration request] In a circular hopper type cooler that has a port through which gas can flow in the hopper wall, a wall without a flow port is provided between the upper flow port and the lower flow port, and the height of the wall is set to 0.3 times the cross-sectional thickness of the hopper. A circular hopper-shaped cooler characterized by the above.