JPH0613706B2 - How to avoid noise when opening the charging lid of a coke dry fire extinguisher - Google Patents

Description

TECHNICAL FIELD The present invention relates to the use of red hot coke in a cooling furnace of a coke dry fire extinguisher, when the charging lid is opened immediately before,
The present invention relates to a method for avoiding the generation of a roaring noise caused by explosive combustion of combustible gas in a pre-chamber.

Conventional technology The red-ripened coke charged into the cooling furnace of coke dry fire extinguishing equipment contains combustible components mainly composed of hydrogen and carbon monoxide. Therefore, the prechamber above the cooling furnace is filled with combustible gas containing 10 to 25% hydrogen and 5 to 15% carbon monoxide.

For this reason, when opening the charging lid for charging coke,
The flammable gas comes into contact with the air around the charging port to cause rapid combustion or explosion, which adversely affects the surrounding environment due to the flame and explosion, and poses a problem in safety work. Therefore, a method has been adopted in which the gas in the pre-chamber is diffused into the atmosphere and, instead, a circulating inert gas for cooling in which a combustible gas component is adjusted is introduced into the pre-chamber. However, this method has a problem in terms of thermo-economics because it emits high-temperature and high-calorie gas, and there is a problem in emission of dust-containing gas to the atmosphere because of pollution.

Therefore, various innovations have been made in the past, and as an improved method thereof, for example, a gas component in the pre-chamber is analyzed, and based on the amount of the combustible component in the gas component, a gas for adjusting the component such as nitrogen. Is introduced to dilute combustible components (Japanese Patent Laid-Open No. 59-1591).

However, in the improved method described above, it is possible to automatically analyze the gas component in the pre-chamber and automatically perform the calculation for setting the introduction amount of the component adjusting gas based on the analyzed value. It requires expensive and complicated equipment.

In view of the present situation, the present invention proposes a method for reliably preventing the gas in the pre-chamber from exploding in the vicinity of the charging port and avoiding the explosion noise when the charging lid is opened.

Structure of the Invention The present invention, in the coke dry fire extinguishing equipment, 20-40 seconds before opening the charging lid of the cooling furnace for charging the red hot coke, the water in the trough for water sealing of the charging lid is discharged to water. The gist is to open the charging lid after releasing the seal, gradually injecting air from around the charging lid into the furnace, slowly burning the combustible gas in the pre-chamber in the furnace. This is a method of avoiding the explosion noise when the charging lid of the coke dry fire extinguisher is opened.

In the present invention, 20 to 40 seconds before opening the charging lid, the water in the water sealing trough of the charging lid is discharged to release the water sealing, and the air is gradually heated from the surroundings of the charging lid. In order to slowly burn the flammable gas in the pre-chamber,
Most of the combustible gas is combusted before the charging lid is opened for charging the red hot coke, so that the combustible gas is prevented from explosively burning when the charging lid is opened.

In addition, the timing of injecting water from the water sealing trough to release the water sealing and injecting air from around the charging lid into the furnace is to open the charging lid of the cooling furnace for charging the red hot coke 20 ~ 40
What was said from the second before, the combustion of the combustible gas was not sufficient 20 seconds before opening the charging lid, and when it was more than 40 seconds before,
This is because air enters even though the combustion of the combustible gas has already been completed before the opening of the charging lid.

As a concrete means to set and control 20-40 seconds before opening the charging lid for the injection of red hot coke, the winding of the coke bucket loaded with red hot coke was started, and the fact that it passed a specific place was Since it is possible to set the time to open the charging lid after detection to about 30 seconds, open the drain valve of the water sealing trough based on the signal that detected passage of the coke bucket. There are ways.

Next, details of the present invention will be described with reference to the drawings showing an example of the embodiment.

FIG. 1 is an explanatory view of a facility in which a device for releasing a water seal is added to a charging lid (3) of a cooling furnace (1) of a normal coke dry type facility for carrying out the present invention. FIG. 2 is an explanatory view showing an enlarged main part thereof.

That is, the cooling furnace (1) has a pre-chamber (2) at the top and a cooling chamber (11) at the bottom, a charging lid (3) at the charging port above the pre-chamber (2), and a cooling chamber ( 11) Cutting device below
(12) is provided, and the circulating gas that has reached a high temperature by exchanging heat with the red hot coke in the cooling chamber (11) is heat-exchanged again in the boiler (13) and is cooled again. A circulation furnace is formed in the lower part of 11) and is configured to circulate a circulation gas consisting mainly of nitrogen gas for cooling the red hot coke.

In the cooling furnace (1), a drain pipe (7) penetrating into the water sealing trough from the outer wall near the bottom of the water sealing trough (4) provided around the charging inlet to keep the charging lid (3) airtight. A solenoid valve (5) provided in the middle of the water distribution pipe (7) can be operated by a detection signal generated by a sensor (6) fixed in the middle of the lifting frame (10) of the coke bucket (8). Set up.

The sensor (6) confirmed the passage of the coke bucket when rising, and opened the solenoid valve to drain the water in the water sealing trough just before the red hot coke was put into the cooling furnace, that is, before opening the charging lid. This is for releasing the water seal of the charging lid (3) and, for example, an arbitrary one such as a photoelectric switch can be used.

At the same time that the kiln removal work is started, the top pressure (usually ± 0 to -5 mm water column) of the cooling furnace (1) is sent to the cooling channel (1) of the system gas circulation path so that it becomes -10 mm water column. The gas is vented by opening the diffusion valve (19) of the lower diffusion pipe (18) provided near the inlet or the recovery valve (15) in front of the gas recovery booster. Then, the coke bucket (8) loaded with red hot coke is connected to the retractor (1
At the fixed position of 6), the hoisting machine (9) raises the inside of the elevating frame (10). Then, when it passes in front of the sensor (6) on the way, it detects this and sends a detection signal, which opens the solenoid valve (5) and drains the water in the water seal trough (4). The water seal on the lid (3) is released. Then, the charging lid
Air gradually enters the furnace from around (3) and gradually burns the combustible components in the gas filled in the pre-chamber (2). At this time, even if explosive combustion occurs, the charging lid (3)
Is covered, and a dull, loud noise is heard in the furnace,
No external noise is generated. After the combustion in the furnace is completed, the charging lid (3) is opened, and the hoisting machine (9) is moved to lower the coke bucket (8) that has already reached the charging port to generate red hot coke. It is put into the furnace.

When extinguishing the red hot coke discharged from the kiln using the coke dry fire extinguishing equipment with the cooling furnace shown in Table 1 above, the recovery valve (15) of the gas circulation furnace is opened at the same time as the kiln is discharged to degas the top pressure. To -10 mm water column. Then, the hoisting machine (9) detects the passage of the coke bucket (8) while climbing, and the sensor (6) detects the detection signal, and opens the solenoid valve (5) to discharge the water in the water seal trough (4). Then the water seal was released. Then, it was confirmed that air gradually penetrated into the furnace from around the charging lid (3) and a dull noise was heard and the combustible gas in the pre-chamber was burned.

Next, open the charging lid (3) and add red hot coke,
When the prescribed amount has been charged, the charging lid (3) is reattached,
The electromagnetic valve (5) for drainage was closed, the water supply valve (17) was opened to fill the water-sealing trough with water, and the charging lid was water-sealed.

EFFECTS OF THE INVENTION The present invention makes the top pressure of the cooling furnace of the coke dry type fire extinguishing equipment a negative pressure from the outside air when the coke oven is taken out of the kiln, releases the water seal of the charging lid, and gradually introduces the air, Combustible gas in the gas filled in the pre-chamber is slowly burned in the furnace while the lid is covered, so it is possible to reliably prevent gas explosion outside the charging port, and it is extremely effective for noise prevention and safe work. Moreover, it is economical because the high temperature and high energy gas in the furnace is not discharged wastefully.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of an apparatus for carrying out the present invention, and FIG. 2 is an explanatory view showing an enlarged main part of FIG. 1 ... Cooling furnace, 2 ... Pre-chamber, 3 ... Charging lid,
4 ... water seal trough, 5 ... solenoid valve, 6 ... sensor, 7
…… Drainage pipe, 8 …… Coke bucket, 9 …… Hoisting machine,
10 ... Lifting frame, 15 ... Recovery valve.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 59-1591 (JP, A) JP 58-44715 (JP, A) Actual opening 58-92350 (JP, U) Actual opening 57- 125748 (JP, U)

Claims (1)

[Claims] 1. In a coke dry fire extinguishing facility, 20 to 40 seconds before opening the charging lid of the cooling furnace for charging red hot coke, the water in the water sealing trough of the charging lid is discharged to seal the water. Coke dry fire extinguishing, characterized by opening the charging lid after slowly releasing air from the surroundings of the enclosure lid to slowly burn the combustible gas in the prechamber in the furnace. How to avoid the sound of explosion when opening the charging lid of the equipment.