JPS5844105B2 - Coke dry extinguishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dry coke extinguishing equipment.

Conventionally, scorching coke produced from coke ovens is mainly extinguished using batch type extinguishing equipment, but in this batch type extinguishing equipment, the extinguishing tower and heat exchanger are separated, and the scorching coke In order to extinguish a fire, it was necessary to transport it to a high place, seal it in a bottle, and then pass gas through it, which made it impossible to extinguish the fire continuously, and the heat exchange efficiency was extremely poor.

Recently, as seen in Japanese Patent Application Laid-Open No. 51-47001, a closed fire extinguishing furnace equipped with a stoker for receiving and transferring scorching coke has been formed, and an inert gas is used to cool and extinguish the scorching coke. A coke extinguishing system has been developed and put into use, which is equipped with a circulation system and a cyclone, a cooler, and a fan in the middle of the circulation system.
This fire extinguishing equipment is insufficient to continuously cool and extinguish the scorching coke in the fire extinguishing furnace.

In other words, since the inert gas that has reached a high temperature during cooling and extinguishing is cooled only by a cooler in the middle of the circulation system, the temperature does not drop sufficiently, so it is insufficient to cool and extinguish the scorching coke again. It is.

Therefore, in order to prevent the coke that has been cooled and extinguished from being reburned when it is discharged from the extinguishing furnace, it is necessary to extinguish the coke with water.

Moreover, it is difficult to expect effective heat utilization by recovering heat from high-temperature inert gas only in the cooler.

The present invention was made in order to eliminate the drawbacks of such conventional fire extinguishing equipment, and is capable of efficiently cooling and extinguishing scorching coke, and moreover, effectively using high-temperature inert gas after being used for extinguishing. The object of the present invention is to provide a coke dry extinguishing equipment that allows heat exchange.

An embodiment of the coke dry extinguishing equipment according to the present invention will be described below with reference to the drawings. 1 is a fire extinguishing furnace, 2 is a hopper provided on the upper surface of one side of the fire extinguishing furnace 1, and the lower end of the hopper 2 can be opened and closed. A damper 3 is provided.

At the bottom of the fire extinguishing furnace 1, a stoker 6 consisting of a lath-shaped endless belt 4 mounted on a boot IJ-5, 5' is installed horizontally, and a stoker 6 is installed horizontally at the bottom of the fire extinguishing furnace 1 to cool the scorching coke. A gas inlet conduit 7 is provided for introducing an inert gas for the purpose.

A partition plate 1a is provided at the top of one side of the fire extinguishing furnace 1 to guide the scorching coke falling from the hopper 2 to one side above the stoker 6 and temporarily deposit it thereon.
A large space 8 is provided in the upper part of the other side, that is, the upper end of the stoker 6, and a membrane contact heat transfer part 8a is provided in this space 8.

The furnace wall of the fire extinguishing furnace 1 above the stoker 6 is formed with a water cooling wall 9.

A hopper 10 is provided at the lower end of the other side of the fire extinguishing furnace 1, a damper 10b is provided in two stages within the discharge 10a of the hopper 10, and a coke conveyor 11 is provided outside the furnace at the lower end. .

A gas outflow passage 12 is provided at the upper end of the space 8 in the upper part of the other side of the fire extinguishing furnace 1, a baffle 13 is provided in the middle of the gas outflow passage 12, and a hopper 14 is formed below the baffle 13. This hopper 14 is connected to the upper part of the hopper 10 via a discharge passage 15 having two dampers in the middle.

A contact type gas cooler 16 is connected to the other end of the gas outlet passage 12, and at the outlet of the contact type gas cooler 16, a gas outlet passage 18 is provided with, for example, a cyclone 11 as a gas purifying device. The gas outflow passage 1 is connected to the
A booster fan 19 is provided at the other end of the fan 8 .

A gas supply path 20 is connected to the booster fan 19 , and the tip thereof is connected to the gas inflow conduit 7 .

Next, the operation of the coke dry extinguishing equipment constructed as described above will be explained.

In the figure, scorching coke is put into a hopper 2, a damper 3 is gradually opened, the scorching coke falls into a fire extinguishing furnace 1, and is supplied onto a stoker 6.

The scorching coke supplied onto the stoker 6 passes through the partition plate 1
As shown in the figure, the particles are temporarily deposited directly under the hopper 2 due to the movement of the stoker 6, but are gradually sent to the hopper 10 side as the stoker 6 moves.

The scorching coke sent to the hopper 10 side flows into the lower side of the stoker 6 from the gas inflow conduit 7 through the gas supply path 20 through the drive of the booster fan 19, contacts the rising low-temperature inert gas, and exchanges heat. Extinguished by cooling.

The cooled and extinguished coke falls from the stoker 6 into the hopper 10, passes through the discharge port 10a, is loaded onto the coke delivery conveyor 11, and is transported to a predetermined location.

When the amount of scorching coke decreases due to driving of the stoker 6, the scorching coke is introduced into the hopper 2, the damper 3 is gradually opened, and the scorching coke is supplied onto the stoker 6.

That is, the scorching coke is continuously fed in batches onto the stoker 6 in the fire extinguishing furnace 1, and is cooled and extinguished.

On the other hand, the heated high-temperature inert gas exchanges heat with the scorching coke, flows into the space 8 at the upper end of the stoker 6, contacts the membrane type contact heat transfer part 8a provided in the space 8,
Heat exchange occurs to lower the temperature.

At the same time, the first broken particle separation of the coke mixed into the inert gas and scattered is performed.

Next, the coke flows out from the gas inlet passage 12, and the scattered coke in the high-temperature inert gas collides with the baffle 13, thereby performing a second coarse particle separation.

The coarse particles separated at this time fall from the hopper 14 through the discharge path 15 into the hopper 10, and together with the coke that has fallen from the stoker 6, pass through the discharge port 10a and are loaded onto the coke conveyor 11. transported to a designated location.

The high-temperature inert gas, which has become somewhat purified by removing the scattered coke in this way, flows into the contact type gas refrigerator 16, where heat exchange is performed and the temperature is further lowered.

The low-temperature inert gas whose temperature has been efficiently and sufficiently lowered in this manner flows through the gas outlet passage 18, and is finally separated into coarse particles by the cyclone 17 provided in the middle of the flow to become clean inert gas, which is then used for the booster. When the fan 19 is driven, the gas is caused to flow upward from the gas inflow conduit 7 to the lower side of the stoker 6 through the gas supply path 20 again, and is used to cool and extinguish the scorching coke.

In this way, the inert gas for cooling and fire extinguishing is always circulated in a closed cycle, so it never disappears, and therefore the retained heat obtained by heat exchange with the scorching coke can be exchanged without being lost, making it extremely effective. Heat can be used, and high-quality steam can be continuously obtained, especially if the heat exchanger is a boiler.

Furthermore, while the scorching coke is continuously transferred over the stoker 6, it comes into contact with the low-temperature inert gas rising from below, and heat exchange takes place, resulting in extremely high cooling and extinguishing efficiency.

Incidentally, the temperature of each part in the dry fire extinguishing equipment of the above embodiment of the present invention is approximately 1000°C at the entrance of the space 8, approximately 600°C near the exit of the membrane contact heat transfer section 8a, that is, the entrance of the gas outflow passage 12, 150 at the outlet of the contact gas cooler 16
below ℃.

Further, the total pressure of the booster fan 19 is about 700 mmAg.

In addition, when loading coke onto the conveyor 11 from the discharge port 10a, air flows into the fire extinguishing furnace 1 and reacts with the coke, resulting in C
This is undesirable since O2 is generated and inert gas is replenished, which promotes coke consumption, but in the present invention, dampers 10b are provided in two stages within the discharge port 10a as shown in the figure, and the upper damper 10b is opened. Once the lower damper 10
After dropping the coke onto b, close the upper damper 10b,
After that, the lower damper 10b is opened and the coke is loaded onto the conveyor 11, so that air flows into the fire extinguishing furnace 1.
There is no flow inside.

As can be seen from the above explanation, according to the coke dry extinguishing equipment of the present invention, the scorching coke supplied into the extinguishing furnace in batches can be continuously transferred on the stoker, and during the transfer, the scorching coke can be continuously transferred from the bottom side. Because it can exchange heat with the rising low-temperature inert gas, it can cool and extinguish fires extremely efficiently.

In particular, if the running speed of the stoker is controlled, the temperature can be lowered to a desired level for cooling and extinguishing the scorching coke, making subsequent processing easier.

In addition, the inert gas for cooling and extinguishing can be circulated in a closed cycle and does not disappear, so the entire amount of inert gas can continuously contribute to cooling and extinguishing the scorching coke, and the heat exchange efficiency during cooling and extinguishing. is extremely high, and the retained heat of the inert gas obtained through the heat exchange does not dissipate.Moreover, the high temperature inert gas is heat exchanged in two stages between the membrane contact tube and the contact gas cooler. Since heat is recovered, there are excellent effects such as effective heat utilization.

[Brief explanation of drawings]

The figure is a system diagram showing an embodiment of coke dry extinguishing equipment according to the present invention. 1... Fire extinguishing furnace, 1a... Partition plate, 2.
...Hopper 3...Damper, 4...
... Lath-shaped belt conveyor, 5, 5'... Pulley 6... Stalker 11... Gas inflow conduit, 8... Space, 8a... ...Membrane type contact tube, 9...Water cooling wall, 10
...Hopper, 10a...Discharge port, 1
0b...Damper, 11...Coke discharge conveyor, 12...Gas outflow passage, 13.
... Baffle, 14 ... Hopper 15.
...Discharge passage, 16...Contact gas cooler, 17...Cyclone, 18...Gas outflow passage, 19...Booster fan , 20・
...Gas supply path.

Claims (1)

[Claims] 1 A closed fire extinguishing furnace equipped with a stoker that receives and transfers the scorching coke is formed, and an inert gas circulation path for cooling and extinguishing the scorching coke is attached to the fire extinguishing furnace, and a gas is installed in the middle of the circulation system. In a coke dry extinguishing system that is equipped with a purifier and a fan, the furnace wall above the stoker of the extinguishing furnace is used as a water-cooled wall, and a large space is formed above the end of the stoker, and a membrane is installed in that space. A contact heat transfer section is provided, a baffle is provided in the middle of a gas outflow passage provided at the upper end of the upper space of the fire extinguishing furnace, and a hopper is provided below the baffle, and the hopper is provided with dampers in two stages. It is connected to the hopper at the lower end of the fire extinguishing furnace through a discharge passage, and a contact type gas cooler is provided at the other end of the gas outlet passage, and an outlet of the contact type gas cooler is connected to the inert gas circulation system passage. Dry coke extinguishing equipment, characterized in that the discharge port connected to the hopper at the lower end of the fire extinguishing furnace is provided with a damper in two stages, and the lower end of the discharge port is provided with a conveyor for carrying out coke outside the furnace. .