JPS5945026B2 - Charging device in cooling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a charging device for a cooling device for particles forming a high-temperature mass, and is suitable for cooling various heat-containing solids,
It can be applied to equipment such as heat recovery.

The high-temperature red-hot coke is used in this process as a process in which a counter-current moving bed is used to cool the particle group forming a high-temperature lump with a cooling gas, and thermal energy is recovered from the high-temperature cooling gas through heat exchange with the particle group. Coke dry cooling equipment that uses a flowing moving bed to recover heat is well known.

The above-mentioned coke dry cooling equipment will be explained with reference to FIGS. 1 to 3.

In the figure, reference numeral 1 denotes a coke oven forming a furnace group, and a pusher 2 for pushing out baked coke is provided at the rear of the coke oven 1 so as to be movable along the coke oven 1. .

A guide rail 16 is laid along the coke oven 1 in front of the coke oven 1, and a self-propelled coke guide car 3 is disposed on the guide rail 16. A dust collecting hood 6 is attached to prevent dust and smoke from being generated when the red hot coke 5 is extruded.

Dust is collected in a dust collector 8 through a fixed duct 7 supported by the frame and can be disposed of therein.

Another rail 28 is laid along the guide rail 16 at the lower front side of the guide rail 16.
A transport trolley 10 is placed on top of the transport trolley 10 and is towed by a locomotive 11, and the transport trolley 10 equipped with the charging packet 4 can run on the transport trolley 10 in a direction perpendicular to this running direction. It is placed on.

When the coke guide car 3 runs and stops in front of an arbitrary furnace,
The pusher 2 also moves and stops after the same furnace as the coke guide car 3, and the transport cart 10 is also pulled by the locomotive 11 and stops in front of the coke guide car 3.

Next, the red hot coke 5 pushed out by the operation of the pusher 2 passes through a coke guide car 3 and is deposited in a packet 4.

In this case, the lid of the opening of the fixed duct 7 is opened by an opening mechanism such as a lifting magnet, and the dust generated during extrusion passes through the fixed duct 7 and is collected in a dust collector 8 for disposal.

On the other hand, when the red-hot coke 5 is loaded into the charging packet 4, the transport truck 10 is pulled by the locomotive 11 and the hoisting base 12
Move to the position.

The hoisting base 12 has a pulling device 13 at its lower part for pulling out the trolley 9 on the transport trolley 10, and a hoisting machine 14 for hoisting only the charged packet 4 on the trolley 9 at its upper part. The hoisting machine 14 runs on a tower disposed adjacent to the hoisting base 12, and an arbitrary cooling device 1 disposed below the tower.
It is designed so that it can be stopped on top of 5a.

Therefore, when the transport cart 10 moves to the hoisting base 12, the charging device 13 pulls the charging packet 4 placed on the cart 9 to the lower center position of the hoisting base 12, and then only the charging packet 4 is rolled up. The hoisting machine 1 is hoisted onto the upper part of the hoisting base 12 by the upper machine 14, and the charging packet 4 is hoisted onto the hoisting machine 1.
4 runs sideways and reaches an arbitrary cooling device 15a.

When the hoist 14 reaches an arbitrary cooling device 15a, the gate 18 at the bottom of the charging packet 4 opens due to its own weight, and the red hot coke 5 is charged into the cooling device 15a.

When this charging is completed, the empty charging packet 4 is
It is transported in front of an arbitrary coke oven 1 through a route completely opposite to the transportation route, and is loaded with new red hot coke 5 and transported onto an arbitrary cooling device 15a in the same manner as described above. The entry is made.

The cooling device 15a is shown in detail in FIG. 3, in which a charging ramper 19 is disposed at the top, and a cooling device main body 15 is disposed at the bottom thereof.

The cooling device main body 15 has a pre-chamber 20 formed in its upper part in order to make the temperature distribution of the red-hot coke 5 uniform, and its lower part is a countercurrent moving bed.

Further, a gas blowing port 21 for cooling gas is provided in the lower part of the cooling device main body 15, and a cooling gas blowing device 22 that communicates with the gas blowing port 21 is arranged in the lower part of the cooling device main body 15. .

Further, the cooling device main body 15 is formed by assembling refractory bricks or the like, and a plurality of discharge ports 25 facing diagonally upward are provided on the circumferential inner wall of the intermediate portion thereof.

The discharge port 25 communicates with an annular pipe 26 having a rectangular cross section and provided annularly inside the refractory brick.
6 is provided with a hot gas exhaust port 23.

A cutting and discharging device 24 having a gate 17 facing diagonally upward is disposed at the lower part of the cooling device 15a in order to cut out the coke that has been cooled while descending inside the cooling device main body 15. It is configured to feed cooled coke to a conveying device 27, such as a belt conveyor, below.

The red hot coke 5 charged into the cooling device main body 15 from the charging hopper 19 is supplied to the pre-chamber 20 in the cooling device main body 15 via the charging hopper 19, and is loaded on the coke charged in advance. A countercurrent moving layer is formed and moves downward from the upper blade due to gravity.

On the other hand, the cooling gas is supplied from the gas inlet 21 through the cooling gas blowing device 22 into the cooling device main body 15, and is uniformly blown into the countercurrent moving bed, cooling the red-hot coke as it rises and becoming high-temperature gas. It passes through the exhaust port 25 and the annular pipe 26 and is discharged from the high-temperature gas discharge port 23, and the thermal energy is recovered by a waste heat recovery boiler (not shown), which is recirculated as low-temperature cooling gas and cooled again from the gas inlet 21. It is blown into the main body 15 of the device.

On the other hand, the cooled coke that has descended within the cooling device main body 15 is appropriately cut out by a cutting and discharging device 24 and is appropriately transported by a conveying device 21.

However, the above-mentioned conventional equipment has the following problems.

(1) It is not possible to achieve a uniform temperature distribution that would allow for uniform filling of particles.

(11) Large-scale transportation and hoisting equipment is required, increasing equipment costs.

During the transportation and charging process of particles such as high-temperature red-hot coke, dust and smoke are generated, and dust pollution prevention equipment is required.

QV) Since the transport route is relatively long and requires a long time, heat loss due to heat dissipation to the atmosphere is large and heat recovery efficiency is reduced.

(V) The red-hot coke becomes finer due to thermal shock during transportation, and the red-hot coke becomes finer due to collisions and impacts caused by falling charging from a height, resulting in a decrease in yield. 3 The present invention relates to a charging device which has been made to eliminate the above-mentioned drawbacks of conventional cooling devices for red-hot coke and various heat-containing solids, and includes a plurality of vertical charging ports provided at the upper end of the cooling chamber. It is characterized in that a charging hopper is attached so that the material to be cooled can be uniformly filled.

Embodiments of the present invention will be described below with reference to FIGS. 4 to 6.

In the figure, 31 is the same coke oven as in the conventional example, 32 is a pusher, and a coke guide wheel 34 is installed on a guide rail 33 installed in front of the coke oven 31 along the coke oven 31 so as to be able to run on its own. The cork guide car 34
A hopper 35 is fixed to the side of the hopper 35, and a discharge gate 36 that can be opened and closed by a hydraulic cylinder 37 or the like is provided at the tip of the hopper 35.
is installed.

A dust collection hood 38 is installed above the hopper 35, and the dust discharged from the dust collection hood 38 is sent from a fixed dust collection tray 39 to a dust collector (not shown) for processing. has been done.

A charging hopper 40 whose inside is lined with a lining made of refractory bricks or the like is installed at the front lower side of the coke oven.

A lid attachment device 41 is provided at the top of the charging hopper 40, and is configured to quickly open and close the lid of the charging hopper 40 when charging the red hot coke 42.

At the bottom of the charging hopper 40, there are multiple tubes (four in the drawing).
A charging port 43 is provided, and a lower portion of the charging port 43 communicates with a cooling chamber 45 in a cooling device main body 44 of a cooling device 44a.

The reason for providing a plurality of charging ports 43 is to enable continuous charging in the filled state, to make the level of the red hot coke 420 in the cooling chamber 45 as uniform as possible, and to make the charged red hot coke 420 as uniform as possible. This is to ensure that large and small coke 420 lumps are distributed as uniformly as possible, and the uniform charging of red-hot coke prevents variations in the permeability of the cooling gas as much as possible and cools the red-hot coke as uniformly as possible. It is absolutely essential.

The cooling device main body 44 is lined with a lining made of firebrick or the like to prevent heat loss as much as possible.

Further, a gas blowing port 46 is attached to the lower side of the cooling device main body 44, and the gas blowing port 46 is connected to a cooling gas blowing device 47 provided at a lower portion inside the cooling device main body 44.

The cooling gas blowing device 41 is not limited to the one shown in the drawings, and any conventionally known appropriate device can be used.

In the cooling chamber 45, a countercurrent moving layer is formed by coke, and a plurality of discharge ducts 49 are installed at the upper part of the cooling device main body 44 to communicate with the cooling chamber space 48. The duct 49 is connected to a circular annular tube 50.

The annular pipe 5o is connected to a duct 5 to a heat recovery boiler (not shown).
1.

The height of the coke countercurrent movement layer in the cooling chamber space 48 is determined so that the pressure is approximately on the dog side, and the discharge duct 49
The reason why a plurality of cooling chambers 45 are provided is to uniformly discharge high-temperature gas from the cooling chamber 45.

Furthermore, since the flow rate of the gas discharged from the discharge duct 49 is considered to be larger on the side closer to the duct 51, dampers 52 are provided for each side, so that the flow rate of the discharged gas can be adjusted.

A cutting and discharging device is provided below the cooling device main body 44.

That is, a primary pumper 53 is fixed to the lower part of the cooling device main body 44, and a pair of opposing cutting gates 54 are provided in the middle of the secondary hopper 53 so as to be horizontally slidable.

Further, a seal valve 57 is provided at the lower end of the next hopper 53 so as to be able to open and close vertically with respect to the pin pivot point.

A secondary popper 55 serving as a charging hopper is installed below the secondary hopper 53, and a feeder 56 is installed at the bottom of the secondary hopper 55 to continuously transport cooled coke onto a belt conveyor. It is formed so that it can be cut out by a conveying device 58 such as.

Further, when cutting out coke, the primary hopper 53 and the secondary hopper 55 are always filled with coke.

If the seal valve 57 is opened, there is a risk that the cooling gas may leak to the outside, so to prevent this, the coke level H in the secondary hopper 55 is set to be approximately the same as the coke level H' in the cooling chamber of the cooling device main body 44. The coke discharge port of the secondary hopper 55 to the feeder 56 is designed to be as small as possible.

In order to maintain the pressure in the cooling chamber space 48 at approximately atmospheric pressure, the pressure at the discharge port is also set to atmospheric pressure, and by making it equal to the pressure loss in the cooling chamber 45, which is the pressure loss at the cutout and discharge section. Cooling chamber 45 indicating cooling gas q leakage at the exhaust port
This is to make the amount of cooling gas flowing therein equal to the ratio of the cross-sectional area of the exhaust port and the cross-sectional area of the cooling chamber.

A seal box 59 may be provided at the discharge port, and the pressure within the seal box 59 may be controlled to be approximately the same as the pressure within the cooling chamber interior space 48 to prevent leakage of the cooling gas.

For this purpose, it is necessary to attach a pressure sensor to the seal box 59, connect a gas supply pipe and a gas discharge pipe, and install a flow control valve.

Further, as yet another means for preventing the leakage of cooling gas, the pressure inside the seal box 59 can be reduced by reducing the pressure inside the cooling chamber space 48.
The pressure in the cooling chamber space 48 is detected and compared with the pressure in the seal box 59, and the flow rate control valves of the gas supply pipe and gas discharge pipe are adjusted accordingly. You can also do it.

The operation of the present invention will be explained below.

The coke guide car 34 runs on the guide rail 33 and stops in front of any coke oven 31, and the pusher 32 also runs and is located behind the coke oven 31 where the coke guide car 34 has stopped.

When the coke guide wheel 34 and the pusher 32 are located at a predetermined position, the pusher 32 is extended and the coke oven 3
The red hot coke 42 in the coke guide car 34 is pushed out and stored in a hopper 35 integrated with the coke guide car 34.

When the red hot coke 42 is pushed out, the coke guide car 34
is self-propelled on the guide rail 33, reaches an arbitrary cooling device, and stops.

Then, the lid of the charging hopper 40 is quickly opened by the lid attachment device 41, and then the discharge gate 36 is opened by the dead weight of the red hot coke 42, and the red hot coke 42 is charged into the charging hopper 40, passes through the charging port 43, and is cooled. It descends into the chamber 45 and rides on a countercurrent moving layer formed of coke,
By keeping the cutout gate 54 and the seal valve 57 at the bottom open, the countercurrent moving layer is sequentially moved downward by gravity.

Since a plurality of charging ports 43 are provided, red hot coke can be charged continuously in a filled state, and the level of the countercurrent moving bed is kept approximately equal, and furthermore, red hot coke 420 large lumps and small lumps can be charged. The particle size distribution is also approximately average.

On the other hand, the cooling gas is supplied into the cooling chamber 45 from the gas blowing port 46 through the cooling gas blowing device 47, spreads uniformly over the cross section of the cooling chamber 45, and cools the red-hot coke 42 that descends continuously due to gravity. The gas reaches the cooling chamber space 48 as a high-temperature gas, is sucked into the duct 51 from the exhaust duct 49 through the annular pipe 50, and is sent from the duct 51 to an exhaust heat recovery boiler (not shown) to emit heat. The gas is supplied to the boiler, becomes cooling gas, returns to the gas inlet 46, and is supplied into the cooling chamber 45.

The coke, which has been cooled by the cooling gas while gradually descending due to gravity, passes through the cutting gate 54 when the seal valve 57 is opened.
are discharged onto the feeder 56 through the primary hopper 53 and the secondary pumper 5 bow, cut out from the feeder 56 onto the conveying device 58, and continuously conveyed to the next process by the conveying device 58. be done.

Coke is always stored in the primary hopper 53 and the secondary hopper 55, and H is approximately the same as H', and the pressure at the outlet of the secondary hopper 55 is equal to or lower than the pressure in the cooling chamber space. Since the atmospheric pressure is approximately the same as the pressure in the section 48, the amount of leakage of the cooling gas can be suppressed to a small amount, and if a seal box 59 or the like is provided, almost all leakage to the outside can be prevented. .

It should be noted that the present invention is not limited to the above-mentioned embodiments; for example, it may be used for heat-containing solids other than red-hot coke, and the communication portion between the charging hopper and the charging port may be formed into a conical shape. Of course, various changes can be made without departing from the gist of the invention.

According to the charging device in the cooling device of the present invention, (2) The objects to be cooled can be charged continuously and uniformly regardless of their size, and the temperature distribution can be made uniform.

(II) Since the pressure loss in the cutting and discharging device and the pressure loss in the cooling chamber are made approximately the same, and the pressure near the discharge port of the discharging device is set to about atmospheric pressure, the amount of leakage of cooling gas is extremely small.

Military It is possible to smoothly cut out powder such as coke.

■ Pollution caused by dust during transportation can be prevented, eliminating the need for dust pollution prevention equipment and reducing equipment costs.

■ Particle size reduction due to drop impact is reduced, improving yield.

■ Heat recovery efficiency is also improved.

Demonstrates excellent effects such as

[Brief explanation of drawings]

Fig. 1 is an explanatory plan view of a conventional red hot coke cooling equipment, Fig. 2 is an explanatory diagram of a conveying device in the cooling equipment of Fig. 1, and Fig. 3 is an explanatory diagram of the mechanism of the cooling equipment of the cooling equipment of Fig. 1. FIG. 4 is an explanatory plan view of the charging device in the cooling device of the present invention, FIG. 5 is an enlarged view in the V-V direction of FIG. 4, and FIG. 6 is a VI- It is an enlarged arrow view in the VI direction. 31...Coke oven, 32...Pusher, 34...Coke guide car, 35...
...Hopper, 36...Discharge gate, 40...
...Charging hopper, 42...Red hot coke, 43...Charging port, 44...Cooling device main body, 44a...Cooling device, 48・・・・・・
Cooling room space section.

Claims (1)

[Claims] 1. A charging device for a cooling system, characterized in that a charging hopper having a plurality of vertical charging ports is attached to the upper end of a cooling chamber to uniformly charge objects to be cooled.