JPS62585A - Method of preventing occurrence of detonation in opening feeding cover of dry quenching equipment for coke - Google Patents

Abstract

PURPOSE:To surely prevent explosion caused near a gas feeding inlet within a prechamber, by gradually feeding air into a cooling oven from the feeding inlet prior to opening of a feeding cover of the cooling oven for feeding a red-hot coke. CONSTITUTION:A coke bucket 8 loaded with a red-hot coke is transferred to a predetermined position of a feeder apparatus 16 and rises through within an elevating frame 10 with a winding machine 9. At this time, a sensor 6 detects the passage of the bucket when it passes in front of a sensor 6 and transmits a detecting signal, which causes a solenoid valve 5 to be opened and water contained in a water-sealed trough 4 to be discharged, thereby releasing the water seal of a cover 3. This is turn causes air to be gradually fed from the periphery of the feeding cover 3 into the oven, which leads to gradual combustion of combustible components contained in a gas filling a prechamber 2. At this time, even if explosive combustion is caused, the detonation does not sound outside the oven although a large thick detonation sounds within the oven, since the feeding cover 3 is put on the oven.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention provides a method for charging red-hot coke into a cooling furnace of coke dry extinguishing equipment, and immediately before opening the charging lid.
The present invention relates to a method for avoiding explosion noise caused by explosive combustion of flammable gas in a pre-chamber.

BACKGROUND OF THE INVENTION Red-hot coke fed into a cold furnace of conventional coke dry extinguishing equipment contains combustible components mainly consisting of hydrogen and carbon oxide. Therefore, the pre-chamber at the upper part of the cooling furnace is filled with flammable gas containing 10 to 25% hydrogen and 5 to 15% carbon oxide.

Therefore, when the charger is released to charge coke,
The above-mentioned flammable gas causes rapid combustion or explosion when it comes into contact with the air around the charging port, which has an adverse effect on the surrounding area due to flames and explosions, and also poses safety problems. Therefore, a method has been adopted in which the gas in the pre-chamber is vented to the atmosphere, and instead, a circulating inert gas for cooling with adjusted combustible gas components is introduced into the pre-chamber. However, this method has problems in terms of thermoeconomics because it dissipates high-temperature, high-calorie gas, and there is also a problem in terms of pollution caused by the dissipation of dust-containing gas into the atmosphere.

Therefore, various efforts have been made in the past.As an improved method, for example, the gas component in the pre-chamber is analyzed, and based on the m number of combustible components in the gas component,
There is a method of diluting the combustible components by introducing a component adjusting gas such as nitrogen (Japanese Patent Application Laid-Open No. 1591-1989).

Purpose of the Invention However, in the above improved method, it is possible to automatically analyze the gas components in the pre-chamber and automatically perform calculations for setting the amount of gas to be introduced for adjusting the components based on the analyzed values. requires expensive and complicated equipment.

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

Structure of the Invention The present invention provides a dry coke extinguishing system in which air is gradually introduced into the furnace through the charging port to eliminate flammable gas in the pre-chamber before opening the charging lid of the cooling furnace to charge red-hot coke. This is a method for avoiding explosive noise when opening the charging lid of coke dry extinguishing equipment, which aims to slowly burn coke in the furnace.

To allow air to gradually enter the furnace from the charging port, install an air supply pipe on the charging lid to gradually supply air, or drain the water in the charging lid water seal 1-rough and Unseal and
There are various methods such as a method of gradually infiltrating air into the furnace from around the charging lid, but in short, any method may be used as long as it is a method of gradually infiltrating air into the furnace from the charging port.

However, if the water in the charging lid water seal trough is drained to release the water seal and air is allowed to enter from around the charging lid, the air will gradually enter the entire area and produce the best effect.

Also, the timing to let air enter the furnace from the charging port is
An appropriate time is 20 to 40 seconds before the opening of the charging lid, and one method is to drain the water in the water sealing trough using a coke bucket hoisting start signal or the like.

Next, details of the present invention will be explained based on drawings showing an example of implementation.

FIG. 1 is an explanatory diagram of equipment in which a device for releasing the water seal is added to the charging lid (3) of the cooling furnace (1) of a normal coke drying equipment in order to carry out the present invention. Figure 2 is
FIG. 2 is an explanatory diagram showing an enlarged view of the main part thereof.

In other words, the cooling furnace (1) has a pre-chamber (2) at the top.
A cooling chamber (11) is formed at the bottom, and a pre-chamber (11) is formed at the bottom.
2) Attach the charging lid (3) to the upper charging port and the cooling chamber (11)
A cutting device (12) is provided below the cooling chamber (1
The circulating gas that has become high temperature by exchanging heat with the red-hot coke in step 1) is cooled again by exchanging heat with the boiler (13), and then sent to the lower part of the cooling chamber (11) via the circulation fan (14). It is configured to circulate a circulating gas consisting mainly of nitrogen gas for cooling the red-hot coke.

In the above-mentioned cooling furnace (1), in order to keep the charging M (3) airtight, a water-sealing trough (4) is provided around the charging inlet. A solenoid valve (5) installed in the middle of this drain pipe (force) can be operated by a detection signal emitted by a sensor (6) fixed in the middle of the elevating frame (10) of the coke bucket t-(8). establish.

The above sensor (6) confirms the passage of the coke bucket during rising, and opens the solenoid valve to drain the water in the water seal trough just before the red-hot coke is charged into the cooling furnace, that is, before opening the charging lid. This is for releasing the water seal on the charging lid (3), and for example, any device such as a photoelectric switch can be used.

Now, at the same time as the kiln unloading operation starts, the gas circulation path in the system is sent to the cooling furnace (1) so that the top pressure of the cooling furnace (1) (usually between ±0 and -5 water columns) becomes -10 water columns. Gas is vented by checking the dispersion valve (19) of the lower dissipation pipe (18) provided near the inlet or the recovery valve (15) in front of the gas recovery booster. And a coke bucket loaded with red hot coke (
8) is in the normal position of the retracting device @(16), and the hoisting device (
9) to ascend within the elevator frame (10).

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 seals 1 to 4. Then, the water seal on the charging lid (3) is released. Then, air gradually enters the furnace from around the charge M (3) and gradually burns the combustible components in the gas filling the pre-chamber (2). At this time, even if explosive combustion should occur, the charging lid (3) is covered, so that only a dull loud sound will be heard inside the furnace, and no explosive noise will be emitted to the outside. After the combustion in the furnace is finished, open the charging lid (3) and
By moving (9), the coke bucket (8), which has already reached the charging port, is lowered and the red hot coke is charged into the furnace.

(Leaving space below) Example: When extinguishing red hot coke discharged from a kiln using a coke dry extinguishing equipment having a cooling furnace shown in Table 1 above, the recovery valve (15) in the gas circulation path was opened at the same time as the discharge from the kiln. It is treated as a gas, and the top pressure is adjusted to -1 (lnm water column).Then, the coke bucket (8
) was detected by the sensor (6), and the detection signal opened the electromagnetic valve (5) to drain the water inside the water seal 4) and release the water seal. Then, air gradually entered the furnace from around the charging lid (3), and a dull sound was heard, confirming that the flammable gas in the pre-chamber had burned.

Next, the charging M (3) is released and red hot coke is charged, and when the predetermined amount has been charged, the charging M (3) is reattached, the solenoid valve for drainage (5) is closed, and the water supply valve ( 11) was opened, the water-sealed trough was filled with water, and the charging lid was sealed with water.

Effects of the Invention This invention makes the top pressure of the cooling furnace of the coke dry extinguishing equipment negative pressure from the outside air when the coke oven is unloaded from the kiln, releases the water seal on the charging lid and gradually allows air to enter, and The flammable gas that fills the pre-chamber with the container covered is slowly burned in the furnace, which reliably prevents gas explosions outside the charging port and is extremely effective for noise prevention and safe work. Moreover, it is economical because the high-temperature, high-energy gas in the furnace is not discharged wastefully.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an example of an apparatus for implementing the present invention, and FIG. 2 is an explanatory diagram showing an enlarged main part of FIG. 1. 1...Cooling furnace, 2...Pre-chamber, 3...
・Charging lid, 4... Water seal trough, 5... Solenoid valve,
6...Sensor, 7...Drain pipe, 8...
Coke bucket, 9...Hoisting machine, 10...Elevating frame, 15...Recovery valve.

Claims (1)

[Claims] 1. In coke dry extinguishing equipment, before opening the charging lid of the cooling furnace to charge red-hot coke, air is gradually introduced into the furnace through the charging port to eliminate flammable gas in the pre-chamber. A method for avoiding explosive noise when opening the charging lid of coke dry extinguishing equipment, which is characterized by slowly burning coke in a furnace. 2. The coke dry extinguishing equipment set forth in claim 1, characterized in that the water in the charging lid water-sealing trough is discharged and air is gradually allowed to enter the furnace from around the charging lid. How to avoid the loud noise when opening the lid. 3. Claim 2, characterized in that the rising passage of the coke bucket is detected during the process of hoisting the coke bucket, and the water in the charging lid water sealing trough is discharged based on the detection signal.
Method for avoiding explosive noise when opening the charging lid of coke dry extinguishing equipment as described in .