JPH0325217B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for processing granular material;
The present invention relates to an apparatus that can be advantageously used for heating, drying, cooling, etc. processing of various ores, metal compounds, etc.

The present invention will be described below with particular reference to the cooling of pitch coke among these granular materials.

Dry processing equipment, which is advantageous in improving yields and recovering sensible heat, is used to process granular materials that require cooling after being fired, such as cement, coke, and sintered ore. For bulk materials, a shaft furnace or circular grade equipment is generally used.

However, in practice, there is an appropriate particle size range for fluidized beds and shaft furnaces.
On the other hand, in a shaft furnace, the diameter is preferably 10 mm or more, and the particle size distribution range is also narrow. If you go outside these appropriate areas,
Not only does pressure loss increase and running costs deteriorate significantly, but uniform cooling cannot be achieved.
This is extremely disadvantageous in practice, as it causes problems such as increased equipment costs and worsened economic efficiency. When cooling pitch coke, depending on the brand, the average particle size is 1
It is necessary to handle lumps ranging from millimeters in size to 15 to 20 mm, and in order to ensure the appropriate particle size range, both a fluidized bed and a shaft furnace are required, and one is idle compared to the other. Since it is a piece of equipment, the economic efficiency is very poor.

On the other hand, the applicable particle size range of the circular grading device is more flexible than those of the above two methods. Figure 1 shows a representative cross-sectional view of a circular grade device. 1 is an outer annular member, 2 is an inner annular member provided at a distance from the outer annular member 1, and 3 is a rotating frame. At the lower end of the rotating frame 3, a rotating grating 4 having a gas permeable grade is tiltably attached to the rotating frame 3 and supports the treated granular material. In order to seal the gas passing through the grid 4, an upper hood 5 is installed stationary above the rotating frame 3, and a wind box 6 is installed stationary below. A sealing mechanism is provided between the frame 3 and the wind box 6, which includes a liquid-containing trough 7 and a seal plate 8 extending into the liquid in the liquid-containing trough 7. The rotating frame 3 is supported and moved on a horizontal annular track 10 by wheels 9 attached to the lower part of the rotating frame 3. During this time, the gas 18 is passed through the treated granular material 11 deposited in layers on the grid 4. Thereafter, processing such as cooling is performed. From the above, in the circular grading device, by lowering the layer height of the granular material 11 on the grid 4, pressure loss can be kept low even when handling granular material. In this way, when handling lumps such as pitchcoke, the gas flow rate passing through the grid 4 can be increased and compact equipment can be provided, but when handling powdered materials, the gas flow rate can be adjusted to Since the limiting condition is to keep the fluidization speed below the fluidization speed, the equipment must have a large grid area, resulting in a significant increase in equipment costs. In addition, if you try to increase the height of the outer and inner annular members 1 and 2 to increase the gas flow rate and fluidize the entire body, the fluidization area must be large, and channeling, where part of the layer blows through due to particle size segregation, etc. As a result, uncooled parts occur, making it difficult to treat a circular grading device as a fluidized bed in practice.

The present invention provides an apparatus capable of economically processing granular material having a wide range of particle size configurations, which has heretofore been considered practically unprocessable due to the above-mentioned drawbacks.

That is, the present invention provides an apparatus for processing granular material by heating, drying, cooling, etc., which has a rotating grating having a gas permeability grade at the lower end between an upper annular member and a lower annular member at the upper part of the rotating frame, and A plurality of rows of independent hollow or rectangular granular material holding cylinders are arranged in a gas-tight manner, and the processing medium gas is passed through the rotating lattice from the wind box located below to the granular material holding cylinders. The present invention relates to a granular material processing apparatus characterized in that it is configured to be able to supply granular material.

FIG. 2 is a diagram showing an embodiment of the device of the present invention, and FIG.
The figure is a sectional view taken along line A-A in Figure 2, and Figure 4 is B in Figure 2.
-B sectional view.

In Figures 2 to 4, the same reference numerals as in Figure 1 indicate
The same parts as in the figure are shown, 12 is an upper annular member, 13
14 indicates a lower annular member, and 14 indicates a rotating frame. Between the upper and lower annular members 12 and 13, a plurality of rows of independent hollow cylindrical or angular granular material holding cylinders 15 are installed with both ends fixed to the upper and lower annular members 12 and 13 in a gas-tight manner. Further, at the lower end of each holding cylinder 15, a rotating grating 16 having a gas permeable grade is attached to the rotating frame 14 so as to be tiltable. The treated granular material 11 is deposited and held in layers on a grid 16 in each holding cylinder 15, while wheels 9 attached to the lower part of the rotating frame 14 move the rotating frame 14 on a horizontal annular track 10. It is transported by moving while supporting it. Reference numeral 17a denotes an upper sealing mechanism, which is composed of a lower end 5a of the hood 5 suspended on the upper frame 30a, a seal plate 8a fixed to the hood 5, and a liquid-containing trough 7a attached to the upper annular member 12. . 17
Reference numeral b denotes a lower seal mechanism, which is composed of a seal plate 8b fixed to the rotating frame 14 and a liquid-containing trough 7b fixed to the side circumference of the wind box 6. The gas 18, which is a processing medium, is supplied to the wind box 6, the holding cylinder 15, the hood 5, and the upper and lower sealing mechanisms 17a, 1.
7b, and passes through the grid 16 and the holding cylinder 15 from the wind box 6 to process the granular material by heating or cooling. In addition,
The sealing mechanisms 17 are interconnected by a pressurizing gas pipe 20 in which a pressurizing device 19 is provided.

As described above, according to the apparatus of the present invention, by holding the granular material 11 in a large number of holding cylinders 15, the granular material can be separated into small parts and transported and processed. This means that individual Grade 1
6 By reducing the area, when processing granular materials, it is possible to prevent the gas 18 from blowing through, and each holding cylinder 15 can be treated as an independent fluidized bed, so the gas flow rate can be increased. . Furthermore, when processing bulk material, it can be handled as a stationary fixed packed layer within each holding cylinder 15. Furthermore, even in the case of a material that is a mixture of powdery material and lumpy material, the lumpy material is deposited in the lower layer within the holding cylinder 15 and the powdery granular material forms a fluidized bed on the lumpy material layer, so that it is not trapped in the powdery or lumpy state. The process can be performed at an appropriate gas flow rate.

As described above, according to the apparatus of the present invention, it is not only possible to simultaneously process powdered materials and bulk materials, which was conventionally considered difficult in practice, but also to reduce the cooling area by selecting the optimum gas flow rate. can provide compact equipment,
This is extremely advantageous in terms of equipment costs.

[Brief explanation of drawings]

FIG. 1 shows a representative sectional view of a circular grade device, FIG. 2 shows a representative sectional view of an embodiment of the device of the present invention, and FIGS. and a diagram showing a BB cross section.

Claims (1)

[Claims] 1. In an apparatus that processes granular materials by heating, drying, cooling, etc., a rotating grating having a gas permeability grade at the lower end is provided between the upper annular member and the lower annular member at the top of the rotating frame, and both ends are fixed in a gas-tight manner. A plurality of independent hollow cylindrical or rectangular granule holding cylinders are arranged, and the processing medium gas can be supplied to the granular holding cylinders from a wind box installed below through the rotating lattice. A granular material processing device characterized by: