JP3291092B2 - Dust collection method for coke dry fire extinguishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for collecting red hot coke and coke that has been cooled and extinguished in a coke dry extinguishing system.

[0002]

2. Description of the Related Art Conventionally, fire extinguishing red hot coke from a coke oven has been carried out by using a wet fire extinguishing method, in which a fire extinguishing truck loaded with red hot coke is moved to a fire extinguisher tower and a large amount of water is sprinkled from the top to extinguish the fire. I was However, the wet fire extinguishing of red hot coke causes not only the huge amount of heat of red hot coke to escape to the atmosphere as steam, but also the coke breeze scattered around the surroundings due to the generated water vapor, which poses a pollution problem. Will be raised. For this reason, the recent mainstream fire extinguishing of red hot coke is a coke dry fire extinguishing that can effectively utilize the huge amount of heat possessed by red hot coke, improve coke quality, and solve or reduce the problem of dust pollution.

As shown in FIG. 5, a coke dry fire extinguishing system receives red-hot coke carbonized in a coke oven in a coke bucket mounted on a bucket truck,
A coke bucket was hoisted by a hoist at the top of a cooling tower 33 composed of the cooling chamber 1 and the cooling chamber 32, the charging lid at the top of the pre-chamber 31 was opened and charged, and provided below the pre-chamber 31 under the cooling chamber 32. After cooling to about 200 ° C. by exchanging heat with the circulating inert gas introduced from the inert gas injection port 34, the coke is cut out by the coke cut-off device 35 at the bottom, and the cut coke is conveyed to the blast furnace. Inert gas heated to near 800 ° C by heat exchange with red hot coke,
From the small flue provided around the boundary between the pre-chamber 31 and the cooling chamber 32, the smoke reaches the flue 37 via the annular flue 36 in the outer peripheral wall of the pre-chamber 31, and from the dust-removing grid brick 38 provided in the flue. After the primary dust has been removed by the primary dust remover, the waste gas is introduced into the waste heat boiler 39 to recover the heat, the secondary dust is removed by the cyclone 40 or the like, and the inert gas inlet provided at the lower portion of the cooling chamber 32 again by the circulation blower 41. It is blown from 34.

In the coke dry-type fire extinguishing system, the coke bucket is wound up, traversed to the pre-chamber 31 charging position, the pre-chamber 31 charging lid is opened, red hot coke is charged into the pre-chamber 31, and the fire is cooled and extinguished. Dust is generated during coke cutting and during transportation and other processes. For this reason, in the coke dry-type fire extinguishing equipment, local dust collection is performed in each step of suctioning and removing dust with a hood or the like covering a dust generating portion, and various proposals have been made for a local dust collection device.

[0005]

The local dust collection in the above-mentioned conventional coke dry fire extinguishing system cannot completely seal the dust-generating portion, so that the dust cannot be reliably collected depending on the weather and wind direction. , May cause dust pollution. In particular, in the process of hoisting the coke bucket, traversing to the pre-chamber charging position, opening the pre-chamber charging lid, and charging red hot coke into the pre-chamber, a large amount of dust is entrained by the hot air flow from the red hot coke. Escaping into the atmosphere was inevitable.

It is an object of the present invention to provide a method for collecting coke dry fire extinguishing equipment that can capture dust that could not be captured by local dust collection in the above coke dry extinguishing equipment and minimize dust pollution. .

[0007]

Means for Solving the Problems The present inventors have conducted various tests and studies to achieve the above object. As a result, dust pollution can be minimized by covering the coke dry fire extinguishing equipment with a dust collection building.In addition, local dust collection at dust generating points and dust collection throughout the building can be performed in accordance with the operation cycle of the coke dry fire extinguishing equipment. It was concluded that dust could be collected effectively without lowering the dust collection capacity by controlling the suction air volume of the air, and the present invention was reached.

That is, the first invention of the present application is to provide a coke dry-type fire extinguishing system that collects dust locally at a dust generating site, and covers a whole area around a coke bucket hoisting tower and a cooling tower top with a dust collecting building. This is a method for collecting dust in a coke dry fire extinguishing system, which collects dust in the entire building.

Further, the second invention, the dust portion of the coke dry quenching facility while local dust, the entire floor of the ambient and cooling tower top of the coke bucket hoisting tower Atsumarichiriken shop <br/> covering, when Ken ya whole collection dust, coke suction air amount of the dry quenching facility denominated ya whole precipitator in response to the operation cycle of the local current coke dry quenching facility characterized by controlling the amount of suction air of dust collecting Dust method.

[0010]

According to the present invention, a dust collection site is locally collected, and the entire area around the coke bucket hoisting tower and the cooling tower top is covered with a dust collection building to collect the entire building. Although the lower end of the coke bucket hoisting tower is open, it is sucked by the dust in the building, and furthermore, due to the temperature of the red hot coke in the coke bucket, a rising air current is generated due to the chimney effect, and when the coke bucket is hoisted. Dust scattering can be reliably prevented. Dust that could not be captured by local dust collection is captured in a dust collection building, suctioned into a dust removal device, and removed. For this reason, dust pollution from coke dry fire extinguishing equipment can be minimized.

Further, while local precipitator the dust portion of the coke dry quenching facility, covered with Atsumarichiriken ya furo entire A surrounding and cooling tower top of the coke bucket hoisting column, Ken ya whole <br/> upon that body precipitator, by corresponding to the operation cycle of the coke dry quenching facility to control the amount of suction air of the suction air volume and the local precipitator denominated ya whole precipitator, without lowering the dust collection capacity, the whole of the current The amount of dust and wind can be minimized, and wasteful capital investment can be suppressed to save energy.

The local dust collecting points of the coke dry-type fire extinguishing equipment include a hoist running dust collecting, a charging hopper collecting dust, a red hot coke extracting dust collecting, a cooling coke extracting dust collecting, a cooling coke conveyer dust collecting, and an atmospheric emission. There is gas collection. Among them, as for the cooling coke cut-out portion dust collection and the cooling coke conveyor dust collection, coke always flows and it is necessary to collect dust. However, the traveling dust collection of the winding machine, the dust collection in the charging hopper section, and the dust collection in the red hot coke cutout section are divided into a timing at which the red hot coke is transported and a timing at which the red hot coke is not transported according to the schedule for discharging the coke oven. Therefore, Ken ya whole precipitator and hoist traveling dust, charging hopper portion precipitator, the suction tube of the dust collection system of the red hot coke cutout portion precipitator valves or dampers with actuator provided, the timing at which the coke is not transported In (2), since dust collection is unnecessary, it is possible to suppress a useless amount of dust collection air by closing a valve or a damper.

The red hot coke in the coke dry fire extinguishing system moves from the hoisting tower to the running of the hoist and then to the charging hopper, so that the bucket containing the red hot coke is linked with a position detector such as a limit switch or the operation of each device. By combining these sequences and opening and closing a valve or damper with an actuator, an energy-saving operation in which the total amount of collected wind is automatically reduced can be performed. Also, if the constant overall dust collecting airflow, by the amount of closing the valve or damper local dust can increase the air volume of construction shop dust collection, it is possible to improve the ventilation rate. When performing an energy-saving operation in which the total amount of dust collected is kept low, the number of rotations of the electric motor of the dust collector blower is interlocked with the operation of each device by sequence control.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the method of the present invention will be described below with reference to FIGS. Figure 1 is a system diagram of a dust collecting facility of the coke dry quenching facility for carrying out the method of this invention, FIG 2 is a local precipitator and Ken ya whole collector collecting dust air volume of illustration dust as a reference, FIG. 3 is a local dust collecting dust collecting air volume of illustration in the case of performing air volume control by the speed control of the damper opening and closing the dust collecting blower, Figure 4 is the air volume control of the local dust damper opening and closing the construction shop all <br/> body dust collecting It is explanatory drawing of the dust collection air volume at the time of combining. In FIG. 1, 1 is a cooling tower of a coke dry fire extinguishing system, 2 is a coke bucket for loading red-hot coke, 3 is a hoisting coke bucket 2, traverses to the top of the cooling tower 1, and is cooled through a charging hopper 4. This is a hoisting machine that loads red hot coke into 1. Reference numeral 5 denotes a coke cutting device for exchanging heat with a circulating inert gas (not shown) in the cooling tower 1 to cut coke, 6 denotes an outlet conveyor for conveying the coke cut by the coke cutting device 5, and 7 denotes a conveyer. It is also a conveyor.

As the local dust collection in the coke dry fire extinguishing system, the coke bucket 2 wound by the hoist 3
A hoisting tower moving hood 8 for preventing dust from being generated from the hoisting tower, and a traveling hood 9 that moves with the coke bucket 2 connected to the hoisting tower moving hood 8, and comprises a bag filter installed on the ground. Hoisting machine traveling dust collection A connected to a fixed dust collector 10 via a motor-operated valve 11, and connection via a motor-operated valve 12, 13 to a fixed dust collector 10 for preventing dust generation during charging of the charging hopper 4 with red hot coke. And a cover 14 for covering the cut-out portion of the charging hopper portion B, the cut-out portion of the coke cutting device 5 and the loading portion on the outlet conveyor 6, and the fixed dust collector 1
Coke cutting part dust collection C connected to the conveyor belt 0, a coke conveyor connection part dust collection D connected to a fixed dust collector 10 for preventing dust generation from the transfer part 15 from the outlet conveyor 6 to the transport conveyor 7, and a cooling tower. An air emission gas collection E connected to a fixed dust collector 10 for preventing dust generation from the upper combustion emission pipe 16 and the lower emission pipe 17 is provided.

In the present invention, apart from the local dust collection in the coke dry fire extinguishing equipment, a building 18 covering the top floor of the cooling tower 1 and a hood covering the periphery of the coke bucket hoisting portion connected to the building 18 A dust collection building 20 comprising 19 is provided, and the dust collection building 20 forms a whole building dust collection F connected to the fixed dust collector 10 via an electric valve 21. In addition, 22 is a suction blower, 23 is a chimney, and 24 is a circulation blower for circulating inert gas. Therefore, although the lower end of the hood 19 is open, it is sucked in by the whole building dust collection F, and furthermore, due to the temperature of the red hot coke in the coke bucket 2, a rising air current is generated due to the chimney effect of the hood 19, and the coke bucket 2 is discharged. In addition to preventing dust scattering at the time of hoisting, the scattered dust that could not be captured by the local dust collection of the hoisting machine traveling dust collection A and the charging hopper dust collection B is captured by the entire building dust collection F, and the fixed dust collector 10 Configure so that dust can be removed.

When the coke bucket 2 loaded with red-hot coke is wound on the cooling tower 1 of the coke dry-type fire extinguishing equipment, the hood 19 connected to the building 18 surrounds the winding section of the coke bucket 2. Because of the temperature of the red hot coke,
A rising air current is generated due to the chimney effect, and dust generated when the coke bucket 2 is wound up rises in the building 18, so that dust scattering to the outside can be prevented. In addition, the scattered dust that could not be captured by the local dust collection of the hoisting machine traveling dust collection A and the charging hopper dust collection B floats in the building 18 but is captured by the whole building dust collection F, and is fixed by the fixed dust collector 10. Dust is removed. In addition, since local collection of the dust collection part C of the coke cut-out part, the collection part D of the connecting part of the coke conveyor, and the dust collection E of the air emission gas is also performed, the scattering of the dust from the coke dry fire extinguishing equipment is minimized. be able to.

In the above coke dry extinguishing equipment, red-hot coke is charged into the cooling tower 1 as the coke oven is removed from the kiln. When the coke oven is started, the coke oven is fired every 7 to 10 minutes. Red hot coke is extruded from Also, when the kiln is stopped, no red hot coke is extruded. Of these, the charging operation of the red hot coke into the cooling tower 1 takes about 1 to 1.5 minutes to wind up the coke bucket 2 and about 3 to the completion of the charging of the red hot coke in the 7 to 10 minute intervals.
Minutes. The charging operation of the red-hot coke into the cooling tower 1 is performed at intervals of 7 to 10 minutes while the kiln discharging operation is performed. However, the cutting of the cooled coke from the cooling tower 1 is performed continuously. It has been done. Therefore, of the local dust collection, the coke cutout portion dust collection C and the coke conveyor transfer portion dust collection D always have coke flowing and need to be collected. However, with respect to the hoisting machine traveling dust collection A and the charging hopper section dust collection B, according to the charging schedule of the red hot coke into the cooling tower 1, when the coke is not transported,
Since dust collection is unnecessary, the motor-operated valves 11, 12, and 13 are closed, and the amount of useless suction air can be suppressed. In addition, the electric valve 21
By this, the optimal ventilation frequency of the building dust collection can be selected.

As shown in FIG. 2, the motor-operated valve 1 is
If there is no open / close control of 1, 12, 13, and 21, always 10
0% dust flow is required. However, as shown in FIG. 3, the hoisting machine traveling dust collection A and the charging hopper portion dust collection B open the motor-operated valves 11, 12, 13 and collect local dust at the same time as the coke passes. Although the equipment needs to be 100%, the amount of collected dust can be saved by controlling the rotation speed of the suction blower 22. Further, the motor operated valves 11, 12 of the hoisting machine traveling dust collection A, the charging hopper section dust collection B and the whole building dust collection F,
13 and 21, dust is collected by opening the coke only when it passes, but the suction air volume of the local dust collection of the hoisting machine traveling dust collection A and the charging hopper section dust collection B eventually becomes inside the building 18. , The ventilation frequency is secured for the building 18. Therefore, as shown in FIG. 4, it is sufficient if there is a suction air volume necessary to ventilate the entire building dust collection F, and the dust collection equipment can be reduced in size accordingly.

When the electric valves 11, 12, 13, and 21 are opened and closed, the red hot coke moves from the hoisting tower to the hoisting machine and then to the charging hopper 4, so that the coke bucket 2 containing the red hot coke is limited. A sequence such as a position detector such as a switch or an interlocking operation with each device operation may be combined and opened and closed.

[0021]

As described above, according to the method of the present invention, it is possible to minimize the generation of dust from the coke dry fire extinguishing equipment, and to reduce the total amount of collected air without lowering the dust collection capacity. Energy can be saved by suppressing wasteful capital investment.

[Brief description of the drawings]

FIG. 1 is a system diagram of a dust collecting facility of a coke dry-type fire extinguishing facility for implementing the method of the present invention.

FIG. 2 is an explanatory diagram of a reference to become local dust collector and Ken shop the entire collection dust of the dust collecting air volume.

FIG. 3 is an explanatory diagram of the amount of dust collected when a damper for local dust collection is opened and closed and the air volume is controlled by controlling the number of revolutions of a dust collector blower.

4 is an explanatory view of a dust collecting airflow when combined air volume control of the local dust damper opening and closing the construction ya whole precipitator.

FIG. 5 is an overall system diagram of a coke dry fire extinguishing system.

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Susumu Otani 1850 Minato, Wakayama City, Wakayama Prefecture Sumitomo Metal Industries, Ltd. Wakayama Works (72) Inventor Kiyotaka Yamamoto 3-1-1-15 Toyosu, Koto-ku, Tokyo Shimaima Ishikawa (72) Inventor Masaei Yamaguchi 3-1-1, Toyosu, Koto-ku, Tokyo Ishikawa-Shima Harima Heavy Industries, Ltd. Toji Technical Center (56) References JP-A-56-1116782 (JP) JP-A-57-192487 (JP, A) JP-A-52-130801 (JP, A) JP-A-52-136201 (JP, A) JP-A-55-71787 (JP, A) 60-181189 (JP, A) Fully open 1983-58953 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) C10B 39/02 C10B 45/00

Claims (2)

(57) [Claims] In a coke dry fire extinguishing system, a dust collection site is locally collected, and the entire periphery of a coke bucket hoisting tower and a cooling tower top are covered with a dust collection building to collect the entire building. Dust collection method for coke dry fire extinguishing equipment. 2. A method for locally collecting dust at a point of occurrence of a coke dry fire extinguishing system, and at the same time as surrounding a coke bucket hoisting tower.
The flow across A cooling tower top covered with Atsumarichiriken shop, when whole precipitator Ken ya, the suction air amount of the suction air amount and the local precipitator denominated ya whole precipitator in response to the operation cycle of the coke dry quenching facility A method for collecting dust in a coke dry fire extinguishing facility, characterized by controlling.