JPH0699687B2 - How to enter the boiler section of coke dry fire extinguishing equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for standing a boiler portion of coke dry fire extinguishing equipment (hereinafter abbreviated as COQ equipment).

(Prior art) Conventionally, in order to enter the boiler section of the CDQ equipment during steady operation for inspection or repair, the hot gas coke filled in the fire extinguisher of the CDQ equipment is completely discharged, and then the circulating gas blower is in operation. Cooling gas is introduced into the cooling gas circulation system (inert gas such as N ₂ gas when the circulation gas in the circulation system is high temperature, air when the circulation gas in the circulation system becomes low temperature) and cooled. Circulating gas is discharged from the gas circulation system to cool the fire extinguisher tower and the boiler to room temperature. Such cooling of the fire tower and the boiler part to room temperature must be cooled at a low cooling rate to prevent damage to the refractory lining the fire tower, after introducing the cooling gas into the cooling gas circulation system, It takes about 3 days to cool the fire extinguisher and the boiler to room temperature.

Also, after entering the boiler section and completing inspection or repair, CDQ
Even when the equipment is returned to normal operation, the inside of the fire extinguisher must be cooled to room temperature, and the temperature must be raised at a low heating rate in order to prevent damage to the refractory lining the fire extinguisher.
It takes about a day.

(Problems to be Solved by the Invention) The present invention is capable of cooling a boiler part in a short time while the high-temperature coke is filled in the fire extinguisher, and safely inspecting the boiler part while the high-temperature coke is filled in the fire extinguisher or (EN) A method of entering a boiler section of a CDQ facility that can be repaired and at the same time, after the inspection or repair of the boiler section is completed, the CDQ facility can be returned to normal operation.

(Means for Solving Problems) The gist of the present invention is as follows.

(1) Stop the circulating gas blower while the high temperature coke is filled in the fire extinguisher of the coke extinguishing equipment, and open the emergency gas diffusion valve located downstream from the dust remover of the circulating gas duct from the fire extinguisher to the boiler section and also inside the fire extinguisher. Also, an inert gas is introduced into the boiler section to disperse unburned gas through the emergency gas diffusion valve, and heat resistance is applied to the dust remover that has a dust cutting device installed in the circulating gas duct from the fire extinguisher tower to the boiler section. Of the powdery granular material and burying the circulating gas collision body in the dust remover to cut off the gas passage from the fire extinguisher tower of the dust remover to the boiler part,
Adjusting the valve opening of the top gas diffusion valve of the fire extinguisher to adjust the internal pressure of the fire extinguisher while stopping the introduction of the inert gas into the boiler section and introducing the cooling gas to cool the boiler section and enter the boiler section. A method for entering the boiler section of a coke dry fire extinguisher, which is characterized in that

(2) The method for entering the boiler part of the coke dry fire extinguisher equipment as described in the above item (1), wherein the heat-resistant powder and granules thrown into the dust remover is powder coke recovered from the coke dry fire extinguishing equipment.

(Examples / Operations) The present invention will be described in detail below based on examples.

As shown in FIG. 1, the high temperature coke 2 is filled in the fire extinguisher 1 during steady operation, the circulating gas blower 3 is stopped, and the valve 17 is fully closed. In conjunction with this, the emergency gas diffusion valve 4 is opened, and an inert gas such as N ₂ gas is introduced into the fire extinguishing tower 1 and the boiler section 5 through the valves 18 and 19. As a result, the unburned gas in the gas circulation system is burned and diffused by the emergency gas diffusion valve 4.

When the combustion of the gas emitted from the emergency gas emission valve 4 has subsided, the pressure measurement holes 6 and 6 are opened, from which the primary dust collector 7 and / or the secondary dust collector 8 captures the dust cutting device 9 and The dust coke discharged and collected at 10 is charged into the primary dust collector 7, and the circulating gas collision plate 11 in the primary dust collector 7 is, for example, about 30 cm as shown in FIG. Buried at 12.

After the circulating gas passage 13 in the primary dust collector 7 is blocked by the powder coke 12 in this way, the valve opening of the furnace top gas diffusion valve 14 is adjusted to control the internal pressure of the fire extinguisher 1 to about 0 to 5 mmAq. .

This effectively prevents the invasion of air into the fire extinguisher 1 and prevents the welding of the coke and the refractory lining of the fire extinguisher 1 due to the combustion of the high temperature coke 2 filled in the fire extinguisher 1. To be done.

In addition, there is the generation of undistilled gas,
Even if the introduction of N ₂ gas is stopped, the internal pressure of the fire extinguisher 1 can be controlled to about 0 to 5 mmAq by adjusting the valve opening of the furnace top gas diffusion valve 14.

On the other hand, the circulating gas passage 13 in the primary dust collector 7 is connected to the powder coke 12
After shutting off with N, the introduction of N ₂ gas into the boiler part 5 was stopped, and the manhole 15 provided in the height direction of the boiler part 5
The groups are released in order from the bottom, air is introduced into the boiler unit 5, and the cooling air that has cooled the inside of the boiler unit 5 is diffused through the emergency gas diffusion valve 4 to cool the boiler unit 5.

In this way, when the boiler part 5 is cooled, the internal pressure of the fire extinguisher 1 filled with the high temperature coke 2 is controlled to be a positive pressure, and the emergency gas diffusion valve 4 is opened, but the circulating gas passage in the primary dust collector 7 is closed. 13
Since the powder coke 12 is shut off, the hot gas in the fire extinguishing tower 1 is prevented from flowing into the circulation duct 16 part on the downstream side of the boiler part 5 and the primary dust collector 7 and the outflow from the emergency gas diffusion valve 4. To be prevented. Therefore, the boiler part 5 and the primary dust collector 7
The circulation duct 16 on the further downstream side is quickly cooled by the air introduction, and can be cooled to room temperature in about one day after the air introduction.

When the boiler part 5 is cooled to room temperature, an operator enters the boiler part 5 through the manhole 15 and inspects or repairs the furnace bricks, the boiler tubes, etc. of the boiler part 5. At this time, the internal pressure of the fire extinguisher 1 filled with the high temperature coke 2 is controlled to be a positive pressure. However, since the circulating gas passage 13 in the primary dust collector 7 is blocked by the coke 12 of powder, the inside of the fire extinguisher 1 is closed. Inflow of high temperature gas into the boiler section 5 is effectively prevented, and inspection or repair can be performed safely.

After the inspection or repair of the boiler part 5 is completed, for example, the manhole 15 group is closed, N ₂ gas is introduced into the boiler part 5, and the gas is discharged from the emergency gas diffusion valve 4 to replace the inside of the boiler part 5 with N ₂ gas, The dust cutting device 9 discharges the powder coke 12 in the primary dust collector 7 to open the circulation gas passage 13 in the primary dust collector 7, and to open the emergency gas diffusion valve 4 and the furnace top gas diffusion valve 14. After fully closed,
The circulating gas blower 3 is activated to start the operation.

The introduction of N ₂ gas into the fire extinguisher 1 is stopped by utilizing the non-distilled gas, and the internal pressure of the fire extinguisher 1 is controlled to about 0 to 5 mmAq by adjusting the valve opening of the furnace top gas diffusion valve 14. and time and is, N ₂ into the boiler section introducing N ₂ gas into the 5 same time extinguishing tower 1
Introduce gas.

From the stop of the circulating gas blower 3 to the restart of the circulating gas blower 3 after the inspection or repair of the boiler section 5 is completed, the fire extinguisher 1
Fire extinguisher 1 because it is still filled with high temperature coke 2
The refractory lined inside the fire extinguishing tower 1 remains at a high temperature, and the internal pressure of the fire extinguishing tower 1 is controlled to be a positive pressure to effectively prevent air from entering the extinguishing tower 1 and the high temperature coke filled in the fire extinguishing tower 1 Two
Burning of coke, welding of cokes, coke and fire extinguisher 1
Since it is prevented from being welded to the refractory lining, it is possible to return to the normal operation in 2 to 3 hours after restarting the circulation blower 3.
After the inspection or repair of the boiler unit 5 is completed, the time required to return to the normal operation is about 4 to 5 hours.

In the above examples, the powder coke captured and discharged and collected by the primary dust remover 7 and / or the secondary dust remover 8 of the CDQ facility, which is easily available as a heat-resistant powder, is used.
What collect | recovered the powder coke accumulated in the lower part of the boiler part 5, or a heat-resistant powder granular material which has a particle size of the said powder coke, for example, a ceramic bead, a lime powder, etc. can be used.

Further, the CDQ equipment provided with the plate-shaped circulating gas collision body, that is, the dust remover 7 having the circulating gas collision plate 11 installed therein has been described, for example, Japanese Utility Model Publication No. 59-47637 and Japanese Utility Model Publication No. 59-133644.
The present invention can also be applied to a CDQ facility equipped with a dust remover having a vertical slit-shaped or honeycomb-shaped circulating gas collision body disclosed therein and the like.

(Effects of the Invention) As described in detail above, according to the boiler part entry method of the CDQ equipment of the present invention, the boiler part can be cooled in a short time while the high temperature coke is filled in the fire extinguishing tower, and the high temperature coke in the fire extinguishing tower. The boiler section can be safely inspected or repaired while it is filled, and it can be done within a short time after inspection or repair of the boiler section is completed.
CDQ equipment can be returned to normal operation.

[Brief description of drawings]

FIG. 1 and FIG. 2 are explanatory views of the method for entering the boiler section of the coke dry fire extinguishing equipment of the present invention. 1: Fire extinguisher, 2: High temperature coke 3: Circulating gas blower, 4: Emergency gas diffusion valve 5: Boiler part, 7: Dust collector 9: Dust cutting device, 11: Circulating gas collision plate 12: Powder coke, 13 : Dust collector gas passage 14: Furnace top gas diffusion valve, 16: Circulating gas duct

Claims (2)

[Claims] 1. A fire extinguisher of a coke extinguishing equipment is stopped with a circulating gas blower filled with high temperature coke, and an emergency gas diffusion valve provided downstream from a dust remover of a circulating gas duct from the extinguishing tower to the boiler is opened and the fire is extinguished. In a dust remover with a dust cutting device installed in the circulating gas duct from the fire extinguisher tower to the boiler section by introducing an inert gas into the tower and the boiler section to diffuse unburned gas through the emergency gas diffusion valve. Heat-resistant powder is charged into the dust remover and the circulating gas collision body is embedded in the dust remover to shut off the gas passage from the fire extinguisher tower to the boiler section. By adjusting the internal pressure of the fire extinguisher to stop the introduction of inert gas into the boiler section and introducing cooling gas to cool the boiler section and enter the boiler section. On-site Method. 2. The boiler part of the coke dry fire extinguishing equipment according to claim 1, wherein the heat resistant powder and granules to be put into the dust remover is powder coke recovered from the coke dry extinguishing equipment. How to get in.