JPH0953079A - Dust collecting exhauster of coke dry quenching installation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a dust collecting exhauster of coke dry quenching installation, which can prevent the leakage of dust from the inside of a movable dust collecting hood to outside and can realize an improvement in working environment. SOLUTION: A seal box 25 covering the openings through which ropes 22 of a hoist 7 pass is attached to the upper part of a movable dust collecting hood 13, and a suction duct 26 is connected to the seal box 25 to keep the pressure in the seal box 25 lower than that in the upper part in the hood 13 and at a negative pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting and exhausting device for coke dry fire extinguishing equipment.

[0002]

2. Description of the Related Art Generally, coke dry fire extinguishing equipment is shown in FIG.
As shown in FIG. 2, a cooling tower 4 having a pre-chamber 2 for storing high-temperature red hot coke 1 in the upper part and a cooling chamber 3 for cooling the red hot coke 1 in the lower part
And hoisting the bucket 5 loaded with the high-temperature red hot coke 1 by the hoisting machine 7 mounted on the transfer carriage 6 and then transferring it to the upper part of the cooling tower 4, at the center of the top of the cooling tower 4. The red hot coke 1 in the bucket 5 is charged into the prechamber 2 in the upper part of the cooling tower 4 from the charging port 8 provided, the red hot coke 1 is stored in the prechamber 2, and then the red hot coke 1 is stored in the cooling chamber 3. A coke 1'cooled by a low-temperature circulating gas 9 circulated from a heat recovery boiler (not shown) described later, and the coke 1'cooled by the circulating gas 9 and having a temperature drop is carried out from a cutting device 10 at the bottom of the cooling tower 4 from a cutting device 10. 11 is carried out and carried out to the outside by the carry-out conveyor 11, while the high temperature circulating gas 9'which has cooled the red hot coke 1 and has increased in temperature is not shown in the figure. It was introduced to La to generate a high-temperature high-pressure steam, and to perform the heat recovery.

In the coke dry fire extinguishing equipment as described above, it is necessary to collect gas and dust generated from the red hot coke 1 when the bucket 5 is transferred to the upper part of the cooling tower 4.

Therefore, in the prior art, as shown in FIGS.
As shown in FIG. 3, a fixed hood 12 having upper and lower ends that surround the bucket 5 is opened at a position adjacent to the cooling tower 4 when the bucket 5 is lifted by the hoisting machine 7, and the fixed hood 12 is provided above the fixed hood 12. A movable dust collecting hood 13 that can be connected to the upper end of the fixed hood 12 and that can accommodate the bucket 5 at the lower part of the transfer carriage 6 that can traverse between the cooling tower 4 and the upper side.
The traveling dust collecting hood 15 slidable along the longitudinal direction of the traveling dust collecting duct 14 arranged so as to extend in the transverse direction of the transfer carriage 6 while maintaining the communication state, and the connecting duct 16 Through the moving dust collection hood 1
3 is connected to the upper part, and the traveling dust collecting duct 14 is connected to the dust collector 1
A main dust collecting duct 19 to which a suction device 18 is connected via 7 is connected to form a dust collecting and exhausting device.

A plurality of communicating holes 20 are formed in the longitudinal direction of the traveling dust collecting duct 14 at a required pitch on the surface facing the traveling dust collecting hood 15, and the communicating holes 20 are always closed. A shutter 21 that is held in a closed state and is opened only when the traveling dust collecting hood 15 passes is attached, whereby the traveling dust collecting hood 15 maintains its communication state with the traveling dust collecting duct 14 and its longitudinal direction. It is designed to be slidable along the direction.

During normal operation of the coke dry fire extinguishing equipment, the suction device 18 and the dust collector 17 are driven to drive the main dust collecting duct 19, the traveling dust collecting duct 14, and the traveling dust collecting hood 15.
The inside of the moving dust collecting hood 13 is sucked through the connection duct 16 and the connecting duct 16, whereby the moving dust collecting hood 13 is connected to the fixed hood 12 when the bucket 5 is lifted by the hoisting machine 7. The fixed hood 12 is also sucked to collect dust, and the bucket 5 is housed in the movable dust hood 13 to cool the cooling tower 4.
The dust is also collected when it is transferred to the upper side of the.

[0007]

By the way, in the dust collecting and exhausting apparatus of the coke dry type fire extinguishing equipment as described above, as shown in FIG. 6, the wire rope of the hoist 7 and the wire rope of the hoisting machine 7 are provided above the moving dust collecting hood 13. An opening 23 is formed through which the cord 22 such as a chain penetrates, and a rubber plate 24 is attached to the opening 23 to minimize the gap between the cord 22 and the cord. In No. 22, the penetration position with respect to the opening 23 is slightly different depending on the hoisting level of the bucket 5, and some swinging occurs, so that it is impossible to completely eliminate the gap.

On the other hand, it has been clarified from the actual measurement results that the pressure inside the moving dust collecting hood 13 is higher than the pressure outside the moving dust collecting hood 13 even if suction is performed. This is because the temperature in the moving dust collecting hood 13 is 80 to 90 [° C.], the specific gravity of the gas in the moving dust collecting hood 13 is smaller than that of the atmosphere, and the gas in the upper part of the moving dust collecting hood 13 is Collects to increase the pressure, but a certain amount of gap is formed between the lower part of the moving dust collection hood 13 and the bucket 5, and air is also sucked through this gap, so that the amount of dust suction intake flow during actual operation is It is not possible to obtain a suction gas flow rate sufficient to sufficiently reduce the pressure inside the dust collecting hood 13.

For this reason, the gas in the moving dust collection hood 13 leaks to the outside through the gap between the rubber plate 24 and the cord-like body 22, and a large amount of coke dust contained in the gas is accumulated around the gas. It had a drawback that the working environment deteriorates.

In view of the above situation, the present invention intends to provide a dust collecting and exhausting device for a coke dry fire extinguisher system which can prevent the leakage of dust from the inside of the moving dust collecting hood to the outside and can improve the working environment. To do.

[0011]

According to the present invention, a fixed hood with open upper and lower ends is erected at a position adjacent to a cooling tower of a coke dry type fire extinguisher for cooling red hot coke to recover heat. A hoisting machine for hoisting a bucket loaded with A traveling dust collecting duct installed so that a movable dust collecting hood having an opening for penetrating the upper body can be connected to the upper end of the fixed hood, and is arranged so as to extend in the transverse direction of the transfer carriage. A traveling dust collecting hood, which is slidable along the longitudinal direction while maintaining the communication state, is connected to the upper portion of the moving dust collecting hood via a connecting duct, and a dust collector is attached to the traveling dust collecting duct. In the dust collecting and exhausting device of the coke dry fire extinguisher system that is connected to the main dust collecting duct to which the suction device is connected, the opening for penetrating the cord of the hoisting machine is covered on the upper part of the moving dust collecting hood. A seal box is attached, and an intake duct for keeping the internal pressure of the seal box lower than the upper pressure in the moving dust collection hood and a negative pressure is connected to the seal box. It is related to the device.

Further, according to the present invention, a fixed hood having open upper and lower ends is erected at a position adjacent to a cooling tower of a coke dry fire extinguishing facility for cooling red hot coke to recover heat, and a bucket full of red hot coke is loaded. A hoisting machine for hoisting the hoist through the fixed hood and capable of traversing between the upper side of the fixed hood and the upper side of the cooling tower, capable of accommodating the bucket, and upper part of the hoisting machine. A movable dust collecting hood having an opening for penetrating the body is attached so as to be connectable to the upper end of the fixed hood, and is in communication with a traveling dust collecting duct arranged so as to extend in the transverse direction of the transfer carriage. A traveling dust collecting hood that is slidable along the longitudinal direction while holding the above is connected to the upper part of the moving dust collecting hood via a connecting duct, and the traveling dust collecting duct is sucked by a suction device via a dust collector. In the dust collection and exhaust system of the coke dry fire extinguisher system, which is connected to the main dust collection duct, the seal box that covers the opening for penetrating the hoisting rope is attached to the upper part of the moving dust collection hood. The present invention relates to a dust collecting and exhausting device of a coke dry fire extinguisher facility, characterized in that a blow duct for keeping the inner pressure of the seal box higher than the upper pressure in the moving dust collecting hood is connected to the seal box.

Therefore, in the one provided with the intake duct for keeping the internal pressure of the seal box lower than the upper pressure in the moving dust collecting hood and at the negative pressure, the seal box covering the opening for penetrating the cord of the hoisting machine. Since the internal pressure is kept lower than the upper pressure inside the moving dust collection hood by suction by the intake duct and is kept at a negative pressure, the gas inside the moving dust collection hood is discharged to the outside through the gap between the opening and the cord. It is sucked into the intake duct from the seal box without leaking, and a large amount of coke dust contained in the gas does not accumulate in the surroundings,
The working environment is improved.

Further, in the case where the blower duct for keeping the internal pressure of the seal box higher than the upper pressure in the moving dust collection hood, the internal pressure of the seal box covering the opening for penetrating the hoisting machine is Since the pressure in the upper part of the moving dust collection hood is kept higher than that of the upper part of the moving dust collecting hood by the air blown by the blowing duct, the gas in the upper part of the moving dust collecting hood does not leak to the outside through the gap between the opening and the cord. A large amount of coke dust contained in the gas does not accumulate in the surroundings, improving the working environment.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an example of an embodiment for carrying out the present invention. In the figure, the parts denoted by the same reference numerals as those in FIGS. 4 to 6 represent the same things, and the basic structure is shown in FIGS. It is similar to the conventional one shown in, but the feature of this illustrated example is that
As shown in FIG. 1, a seal box 25 that covers the opening 23 for penetrating the cord 22 of the hoisting machine 7 is attached to the upper part of the moving dust collection hood 13, and the internal pressure of the seal box 25 is set in the seal box 25. Is connected to an intake duct 26 for keeping the pressure lower than the upper pressure in the moving dust collecting hood 13 and at a negative pressure.

In the present embodiment, the intake duct 26
Has a base end connected to the connection duct 16, and a connection part of the connection duct 16 with the intake duct 26 has a moving dust collection hood 13 side for adjusting a dust collection intake flow rate from the seal box 25. A throttle valve 27 is provided.

Since the upper part of the moving dust collecting hood 13 has a positive pressure rather than a negative pressure even if sucked, since it is constructed as described above, the opening 23 for penetrating the cord 22 of the hoisting machine 7 is formed. Since the internal pressure of the seal box 25 that covers the inside of the moving dust collecting hood 13 is kept lower than the upper pressure inside the moving dust collecting hood 13 by suction by the intake duct 26 and the negative pressure, From the seal box 25 to the intake duct 2 without leaking to the outside through the gap with the cord 22.
6, a large amount of coke dust contained in the gas is not accumulated in the surroundings, and the working environment is improved.

In the illustrated example, the moving dust collecting hood 1
When the height of 3 is about 10 m and the total intake air flow rate of dust collection by the connecting duct 16 is Q _C = 2300 [m ³ / min], the moving dust collecting hood 1 at the connecting portion of the connecting duct 16
The pressure level inside 3 is P = 1.25 [mmAqG], and the pressure level inside the moving dust collection hood 13 is P = 2.5 [mm
AqG], the temperature in the moving dust collection hood 13 is tg = 80
[° C.], the flow velocity of inflow air at the lower end of the moving dust collection hood 13 is v≈0.669 [m / sec], and the flow velocity of inflow air at the bottom of the moving dust collection hood 13 is v≈1.92 [m / sec] Since it has been actually measured, the connection duct 16
Between the intake air flow rate Q _{A of the} dust collection intake air in the section _A and the pressure level, the intake air flow rate Q _{B of the} dust collection intake air in the intake duct 26 (B section)
Relationship between the pressure level (This is because the pressure level P _D of the seal box 25 is changed depending on whether it is much, are drawn a plurality of curves for each pressure level P _D of the seal box 25), And seal box 25
The relationship between the dust collection intake flow rate Q _D (= Q _B ) and the pressure level P _D is as shown in FIG. 2, and Q _C = Q _A + Q _B
Of the connection duct 16 at the confluent portion (C portion) of the intake duct 26 in the connection duct 16.
In order to satisfy the condition that the pressure level seen from the portion and the pressure level seen from the intake duct 26 (the portion B) coincide as P _C , from the diagram of FIG. The intake flow rate is Q _A = 1900 [m ³ / min],
The intake air flow rate of dust collection in the intake duct 26 is Q _B = 400
[M ³ / min], the pressure level at the confluent portion (C portion) of the intake duct 26 in the connection duct 16 is P _C = −19
It is understood that the pressure level in [mmAqG] and the seal box 25 may be P _D = −12 [mmAqG].

In this way, it is possible to prevent the dust from leaking from the inside of the moving dust collecting hood 13 to the outside, and to improve the working environment. Moreover, in the case of the example shown in FIG. 1, since the inside of the seal box 25 is maintained at a negative pressure by the intake duct 26 using the existing connection duct 16, a new device that requires power such as a fan. Is not necessary, which is advantageous in terms of cost.

FIG. 3 shows another example of the embodiment of the present invention. In the figure, the parts denoted by the same reference numerals as those in FIG. 1 represent the same parts, and the cord 22 of the hoisting machine 7 is shown. Opening 2 for penetration
3 to the seal box 25 that covers 3
A blowing duct 28 for keeping the internal pressure higher than the upper pressure inside the moving dust collecting hood 13 is connected.

The blow-in duct 28 is connected to a blow-in device such as a fan (not shown), and the internal pressure of the seal box 25 is increased by the air fed from the blow-in device (2. The pressure is kept higher than 5 [mmAqG]).

In the example shown in FIG. 3, the upper part of the moving dust collecting hood 13 does not become a negative pressure but a positive pressure even if sucked, but an opening for penetrating the cord 22 of the hoisting machine 7. Since the internal pressure of the seal box 25 that covers 23 is kept higher than the upper pressure inside the moving dust collecting hood 13 due to the blowing of air by the blowing duct 28, the gas inside the moving dust collecting hood 13 is connected to the opening 23 and the rope. The work environment is improved because a large amount of coke dust contained in the gas is sucked into the connecting duct 16 without leaking to the outside through the gap with the state-like body 22 and is not accumulated in the surroundings.

Thus, also in the case of the example shown in FIG. 3, it is possible to prevent the leakage of dust from the inside of the moving dust collecting hood 13 to the outside,
The work environment can be improved.

The dust collecting and exhausting apparatus for the coke dry fire extinguishing equipment of the present invention is not limited to the above-mentioned illustrated examples, and various modifications can be made without departing from the scope of the present invention. Is.

[0026]

As described above, according to the dust collecting and exhausting device of the coke dry fire extinguishing equipment of the present invention, it is possible to prevent the leakage of dust from the inside of the moving dust collecting hood to the outside, and to improve the working environment. The excellent effect of obtaining can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an example of an embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between a dust collection suction flow rate and a pressure level of each part.

FIG. 3 is a schematic configuration diagram of another example of an embodiment of the present invention.

FIG. 4 is an overall schematic diagram of a conventional example.

FIG. 5 is a partially enlarged perspective view of a conventional example.

FIG. 6 is a schematic configuration diagram showing a main part of a conventional example.

[Explanation of symbols]

 1 Red Hot Coke 4 Cooling Tower 5 Bucket 6 Transfer Cart 7 Hoisting Machine 12 Fixed Hood 13 Moving Dust Collection Hood 14 Running Dust Collection Duct 15 Running Dust Collection Hood 16 Connecting Duct 17 Dust Collector 18 Suction Device 19 Main Dust Collection Duct 22 Cords 23 Opening 25 Seal Box 26 Intake Duct 28 Blowing Duct

Claims (2)

[Claims] 1. A fixed hood having open upper and lower ends is provided upright at a position adjacent to a cooling tower of a coke dry fire extinguisher for cooling red hot coke to recover heat, and a bucket full of red hot coke is used as the fixed hood. A hoist for hoisting the hoist through the inside of the carrier is capable of traversing between the upper side of the fixed hood and the upper side of the cooling tower. A movable dust collecting hood having an opening formed therein is attached to the upper end of the fixed hood so that the movable dust collecting hood is connectable to the traveling dust collecting duct arranged so as to extend in the transverse direction of the transfer carriage while maintaining the communication state. A traveling dust collecting hood slidable along the longitudinal direction was connected to the upper part of the moving dust collecting hood via a connecting duct, and a suction device was connected to the traveling dust collecting duct via a dust collector. In a dust collection and exhaust system for a coke dry fire extinguisher system that is connected to a main dust collection duct, a seal box covering the opening for penetrating the hoisting machine is attached to the upper part of the moving dust collection hood. A dust collection and exhaust device for coke dry fire extinguishing equipment, characterized in that an air intake duct for keeping the internal pressure of the seal box lower than the upper pressure in the moving dust collection hood and a negative pressure is connected. 2. A fixed hood having open upper and lower ends is provided upright at a position adjacent to a cooling tower of a coke dry fire extinguisher for cooling the red hot coke to recover heat, and a bucket full of red hot coke is provided as the fixed hood. A hoist for hoisting the hoist through the inside of the carrier is capable of traversing between the upper side of the fixed hood and the upper side of the cooling tower. A movable dust collecting hood having an opening formed therein is attached to the upper end of the fixed hood so that the movable dust collecting hood is connectable to the traveling dust collecting duct arranged so as to extend in the transverse direction of the transfer carriage while maintaining the communication state. A traveling dust collecting hood slidable along the longitudinal direction was connected to the upper part of the moving dust collecting hood via a connecting duct, and a suction device was connected to the traveling dust collecting duct via a dust collector. In a dust collection and exhaust system for a coke dry fire extinguisher system that is connected to a main dust collection duct, a seal box covering the opening for penetrating the hoisting machine is attached to the upper part of the moving dust collection hood. A dust collection and exhaust device for coke dry fire extinguishing equipment, characterized in that a blowing duct for keeping the internal pressure of the seal box higher than the upper pressure in the moving dust collection hood is connected to the dust collection exhaust system.