JPS6011953B2 - Cooling gas blowing device for vertical dry granule cooling tower - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cooling gas blowing device for a vertical dry granule cooling tower for cooling red-hot granules such as red-hot coke, and particularly relates to a cooling gas blowing device for a vertical dry granule cooling tower formed within the tower body. Cooling gas blowing into a vertical dry granule cooling tower that allows cooling gas to flow counter-currently with an appropriate flow distribution into a moving bed of red-hot granules to follow the movement of red-hot granules and provide uniform cooling treatment. It is related to the device.

[Conventional example]

Generally, a vertical dry granule cooling tower is used to cool red hot coke and the like while recovering its head heat.

This vertical dry granule cooling tower has a charging port for charging red-hot granules such as red-hot coke granules at the top, a granule cutting port at the bottom, and a plurality of holes along the middle stage. It has two gas outlets and a cooling gas inlet at the bottom. Therefore, the red-hot granules introduced into the tower body from the charging port are formed as a moving layer that moves toward the bottom cutting port, and cooling gas is blown into the body from the cooling gas inlet, and this cooling gas flows into the red-hot granules moving bed. While flowing countercurrently through the gas, the gas reaches the outlet to cool the red-hot granules and recover the sensible heat in the red-hot granules. [Problems to be Solved by the Invention] However, in conventional cooling towers of this type, it has been difficult to uniformly bring the high-temperature red-hot particles charged from the top of the tower into contact with the cooling gas blown from the bottom. It is considered a difficult problem.

In particular, since the particle size distribution of the red-hot particles inserted from the top becomes uneven and forms a moving layer, the cooling gas blown into the moving layer forms an uneven flow distribution and flows into the moving layer. It was not possible to cool the particles uniformly by following the flow of the particle moving layer. In other words, in the moving layer of red-hot particles, the part where a large particle distribution is formed has a small ventilation resistance, so a large amount of cooling gas flows and is cooled quickly, but on the other hand, the part where a small particle distribution is formed has a small ventilation resistance. Due to the large size, the flow of cooling gas is poor and cooling becomes slow.

[Object of the Invention] The object of the present invention is to provide a vertical dry granule cooling tower in which a cooling gas is blown into the red-hot granule moving bed in order to obtain a uniform flow distribution and an effective cooling effect. To provide a cooling gas blowing device for a vertical dry granule cooling tower that makes it possible to

[Summary of the invention] In order to achieve the above object, the present invention has the following features:
In a vertical dry granule cooling tower in which a red-hot granule moving bed is formed in the tower body having a red-hot granule charging inlet at the top and a cutting port at the bottom, and cooling gas is cooled by countercurrently flowing thereto, the tower An inverted vice principal conical cylinder is placed at the bottom of the body, and the upper end of the inverted truncated conical cylinder located below is placed at the lower end opening □ of the inverted truncated conical cylinder located above it with a predetermined gap in Sekiguchi. The cooling gas inlets are stacked in multiple stages along the circumferential direction and in the vertical direction to form a funnel-shaped passage having cooling gas inlet ports in multiple stages along the circumferential direction and in the vertical direction. Form a blowing wind box that is divided into multiple pieces along the
A cooling gas inlet pipe is connected to each of these blowing wind boxes through a flow rate control valve, and a flow rate control valve is provided in each of the cooling gas blowing ports formed in upper and lower stages in the blowing wind box, This makes it possible to adjust the flow distribution of the cooling gas in the tower and to blow the cooling gas accurately into the moving bed of red-hot particles.

Embodiment Next, a preferred embodiment of the cooling gas blowing device for a vertical dry granule cooling tower according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, a cooling tower main body 1 formed in a shaft or tower shape has a charging port 2 for red-hot coke granules at its top and a cutting port 3 for cooled coke granules at its bottom. .

A plurality of gas outlets 4 are arranged radially in the middle part of the cooling tower 1.
is formed. These exhaust gas outlets 4 are bored facing upward through the brick wall forming the cooling tower 1. Further, these gas outlets 4 are disposed in an annular passage 5, and the annular passage 5 is connected to a waste heat recovery boiler (not shown). In particular, the present invention is provided at the bottom of the cooling tower 1, and above the bottom cutout 3 of the cooling tower 1, a funnel-shaped passage 8 having a face 7 at the cutout 3 is formed from the inner wall 6 of the cooling tower 1. Ru.

This funnel-shaped passage 8 is for guiding the particles to the bottom cutting port 3 of the cooling tower 1, and has a so-called funnel shape in which the inner diameter of the bottom of the tower body 1 is sequentially narrowed to the inner diameter of the cutting port 3. The granules in 1 are guided and transferred to the cutting port 3. This passage 8 is formed integrally with the cooling tower 1. In the illustrated example, the funnel-shaped passage 8 is constructed by stacking inverted conical cylinders 9 in multiple stages and forming a constant gap 10 between each cylinder 9.

The gap 10 thus formed in the passage 8 forms a cooling gas inlet 13. Further, the inverted face conical cylinders 9 are stacked one on top of the other from the bottom inner wall 6 of the cooling tower 1 to the cutout port 3 below the cooling tower 1 so that the inner diameter thereof becomes smaller in order to form the above-mentioned funnel-shaped passage 8. In addition, the inverted truncated conical cylinder 9 has a lower end entrance part 11 of the cylinder 9a located at the upper side in the figure and is supported in an upper end opening 12 of the cylinder 9b located below it, so that the end edge of the closed part 11a and 12a are overlapped with a predetermined gap 10 between them. By stacking the cylinders 9 in this way, the gas inlet 13 faces downward along the inner wall surface of the funnel-shaped passage 8! This prevents particles passing through the passage 8 from entering the cooling gas blowing row 3 and causing clogging. Further, the cooling gas inlet 13 is formed in multiple stages along the axis of the passage 8, as shown in FIGS. 1 and 2. A blowing wind box 14 enlarged in the radial direction is provided on the outer periphery of the passage 8. This blowing wind box 14 is partitioned by an outer circumferential wall 9a of a passage 8 having a cooling gas blowing port 13 and a cylindrical wall 16 extending below the outer wall 15 of the cooling tower 1, as shown in FIG. The passage 8 is radially divided into a plurality of sections by the partition wall 17 provided between the outer circumferential wall 9a and the surrounding wall 16. In this way, a plurality of divided blowing wind boxes 14a, 14b, 14c, .
By forming . . . , the cooling gas inlet 13 formed in an annular shape on the suitable path 8 by the inverted truncated conical cylinder 9 is divided along the wisteria direction. As shown in FIG. 2, a plurality of cooling gas inlets 13 are formed along the periphery of the passage 8. Further, the conical cylinder 9 forming the funnel-shaped passage 8 is the partition wall 17...
Supported by... An annular pipe 18 as a cooling gas introduction pipe is provided on the outer peripheral side of the blowing wind box 14, and this annular pipe 18 is passed through a cooling gas generation source via a pipe line 20.

Further, the annular pipe 18 is provided with the above-mentioned blowing wind box 14.
A lotus passage pipe 19 is provided for transporting each of a, 14b, and 14c. Each of these lotus tubes 19 is provided with a flow control valve 21, which adjusts the amount of cooling gas blown from the annular tube 18 to each blowing wind box 14a, 14b, 14c... be configured so as to be able to do so. Further, a flow rate control valve 21a is provided between the blowing wind boxes 14a, 14b, 14c and each blowing port 13 so as to adjust the amount of cooling gas blown.

Next, a modification of FIG. 3 will be described.

As shown, a funnel-shaped passage 8 is formed at the bottom of the cooling tower 1, and an annular blowing wind box 14 is provided around the outer periphery of the passage 8, as in the embodiments of FIGS. 1 and 2.

Further, a partition wall 17 is provided within the wind box 14 to divide it appropriately. Further, each of the gas blowing ports 13 formed in the passage 8 is provided with an independent passage 19a. Further, a flow rate control valve 21 is provided in these lotus passages 19a.
are provided respectively, and the flow rate of each gas blowing port 13 can be adjusted. Further, the flow control valves 21 are configured to be able to be opened and closed independently. 2 in the diagram
0a is a cooling gas inlet.

The operation of this device having the above configuration will be described below.

First, in the embodiment shown in FIGS. 1 and 2, the cooling gas supplied from the cooling gas generation source is guided into the annular pipe 18 through two pipes.

The cooling gas guided and supplied into the annular pipe 18 is subjected to ambient pressure,
It is supplied to each of the blowing wind boxes 14a, 14b, 14c... through the lotus pipe 19. This blowing wind box 14a...・…．・．． * serves as a wind box, which maintains the cooling gas at a uniform gas pressure. Furthermore, by operating the flow rate control valve 21 provided for each inlet 13, the amount of cooling gas entering each inlet 13 from the blowing wind boxes 14a, 14b, 14c is changed, and the amount of cooling gas inlet 13 of the funnel-shaped passage 8 is changed. Cooling gas at a predetermined pressure is injected or blown out. In this way, the cooling gas is optionally blown into the moving layer c of the red-hot particles formed in the connecting body 1 from the bottom in multiple stages and from the circumferential direction over the entire inner cross-section, causing countercurrent flow. If a large particle distribution zone or part is formed in the moving layer c of red-hot particles,
The amount of cooling gas blown into the bottom blow-in port 13 at a position corresponding to the particle distribution is reduced by the flow rate control valves 21 and 21a, thereby delaying cooling and following the movement of the moving layer to achieve uniform cooling. On the other hand, if small particles, that is, a particle distribution zone or part with large ventilation resistance, is formed in the moving bed, the flow rate control valve 2 and 21a to speed up the cooling and follow the movement of the cutting port 3 of the moving bed to uniformly cool the flow rate.The flow rate control valve can also be adjusted by measuring the temperature in the surrounding direction of the outlet gas. be. In particular, in this embodiment, as shown in FIG. 2, cooling gas inlet ports 13 are formed from the bottom of the cooling tower 1 so as to divide the inside of the cooling tower 1 in the axial direction around the cutting port 3 in the center. It is possible to cope with the size of the abnormality in particle distribution that occurs in the red-hot particle moving bed. For example, if an abnormality occurs on the blowing wind boxes 14a, 14b in the cross-sectional area of the moving bed, the flow rate control valves 21, 21a are operated to adjust the amount of cooling gas supplied to the blowing wind boxes 14a, 14M. The blowing amount from each cooling gas blowing row 3 is adjusted. In this way, by blowing the cooling gas into the red-hot particle moving bed and causing it to flow counter-currently, the moving cross-sectional area of the moving bed can be uniformly cooled.

In the embodiment shown in FIG. 3 as well, the amount of cooling gas in each cooling gas inlet 13 can be similarly adjusted by the flow rate control valve 21, and countercurrent flow can be achieved while uniformly blowing into the particle moving bed.

As described above, this device is capable of blowing cooling gas variably into the moving bed of red-hot particles in a countercurrent manner in accordance with the cross-sectional area of the moving bed near the bottom outlet of the cooling tower 1, and The granules can be completely cooled through the cutting port 3 and then cut out to the outside.

〔Effect of the invention〕

In short, according to the present invention, the following excellent effects are achieved.

[1] Cooling gas can be blown into the moving bed of red-hot particles formed in the cooling tower in a uniform flow distribution, and the moving bed can be sequentially cooled by following the flow of the moving bed. , which made it possible to continuously cut out the cooled granules.

■ In addition, by providing a flow rate control valve in each gas inlet, the flow rate of cooling gas from the inlet can be variably adjusted.Also, by forming a waiting chamber for the cooling gas blown into the inlet, the pressure can be equalized. It is capable of supplying gas to the inlet.

[31] Cooling gas can be accurately blown out from the cooling gas inlet without backflow of red-hot particles.

'41 Furthermore, it exhibits various features such as an extremely simple structure and excellent operability, and has enormous practical value.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic sectional view showing a preferred embodiment of the present invention, FIG. 2 is a view taken along line A-A in FIG. 1, and FIG. 3 is a partial sectional view showing a modified embodiment. It is.

In the figure, 1 is a cooling tower, 8 is a funnel-shaped passage, 13 is a cooling gas inlet, 9 is an inverted conical cylinder, 14 is a wind box for blowing, and 21, 21a are flow rate control valves.

Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. In a vertical dry granule cooling tower in which a red-hot granule moving bed is formed in the tower body having a red-hot granule charging inlet at the top and a cutting port at the bottom, and cooling gas is cooled by countercurrently flowing thereto, the above-mentioned An inverted truncated conical cylinder is provided at the bottom of the tower body, and a predetermined gap is provided in the lower end opening of the inverted truncated conical cylinder located above the inverted truncated conical cylinder and in the upper end opening of the inverted truncated conical cylinder located below. They are separated and supported and stacked in multiple stages to form a funnel-shaped passage having cooling gas inlet ports in multiple stages along the circumferential direction and in the vertical direction, and the cooling gas inlet ports are installed on the outer periphery of the passage. A blowing window box is formed which is divided into a plurality of pieces along the direction, an inlet pipe is connected to each of these blowing window boxes via a flow rate control valve with cooling gas, and the blowing window boxes are formed in multiple stages above and below within the blowing window box. 1. A cooling gas blowing device for a vertical dry granular cooling tower, characterized in that each cooling gas blowing port is provided with a flow control valve.