JPH0562159B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a vertically arranged riser pipe connected to each carbonization chamber, and a dry main connected to the upper end of the riser pipe via a horizontally arranged dry main connecting pipe. A coke oven is equipped with a shutoff device that can be opened and closed between the riser pipe and the dry main, and the coke oven gas generated in the carbonization chamber can be collected in the dry main and recovered. The present invention relates to an improvement in a coke oven configured to close a shutoff device and stop gas supply to a dry main when combustible components of coke oven gas decrease.

Conventionally, after the shut-off device was closed, the gas from the carbonization chamber was combusted from the top of the riser pipe and released into the atmosphere. In addition, the time from closing the cofferdam to charging lime is relatively short.
This is because it was recognized that the heat loss was not that large.

However, nowadays, flames are no longer necessary to determine whether a fire has occurred, and in reality, there is a considerable amount of thermal energy wasted due to the release of combustion exhaust gas from the riser, and there is also a large amount of wasted thermal energy due to coal dust scattering, etc. There were also some problems with the working environment.

An object of the present invention is to extremely reduce waste of thermal energy from closing the shut-off device to discharging coke, and also to facilitate dust collection.

The characteristic structure of the coke oven according to the present invention is that vertically arranged riser pipe extension parts are provided above the upper coal part of the riser pipe through opening/closing devices, and the upper coal part of the riser pipe extension pipe is connected to the riser pipe extension part. It is connected to the exhaust gas recovery pipe through a horizontally arranged waste gas connection pipe, and the exhaust gas recovery pipe is equipped with a heat recovery device and a dust collector in the order listed, and the results are as follows.

In other words, after the shut-off device is closed and the coke oven gas has been recovered by dry may, the switch is opened in the riser pipe for a short period of time before the coal is charged, and the high-temperature coke oven gas with reduced combustible components is removed. Combustion gas generated by supplying air from the mouth, etc.
The waste gas recovery pipe supplies the heat energy to a heat recovery device, where the thermal energy is recovered in a suitable form, for example for preheating combustion air to be fed to a coke oven or for producing steam.

As a result, thermal energy that was previously wasted can be effectively recovered from the time the shut-off device closes to the time the coke is discharged from each of the dozens or even hundreds of coking chambers. According to calculations made at the factory, approximately 6000kcal/h of heat energy can be effectively used per coal chamber, and overall,
It has been found that operation is extremely advantageous in terms of economy and energy conservation.

In addition, by connecting dust removal equipment to the waste gas recovery pipe,
It has been found that it is possible to easily prevent environmental deterioration due to dust scattering, etc.

Furthermore, in this configuration, the riser pipe and the riser pipe extension are directly connected in the vertical direction. Further, from the upper end portions of the riser pipe and the riser pipe extension, a dry main connection pipe and a waste gas connection are provided, which are disposed substantially horizontally, independently of each other, to introduce gas into predetermined portions. Therefore, in this configuration, when the waste gas is led to the waste gas recovery pipe, coal dust contained in a relatively large amount in the gas is difficult to enter the dry main side.

Furthermore, since the riser pipe and the riser pipe extension are almost directly connected in the vertical direction,
This area can be easily cleaned from the top of the rising pipe extension.

Next, examples will be shown.

As shown in FIG. 1, a large number of carbonization chambers 2 and combustion chambers 3 are arranged and formed alternately in a furnace body 1.
A plurality of coal charging ports 4 are formed in the upper part of each coal charging port 4.
A coal loading car 5 for supplying coal is movably installed in the upper part of the furnace body 1, and is configured such that coal as a raw material for coke can be selectively fed into all of the coking chambers 2 from the coal loading car 5. .

While connecting the riser pipe 6 to each of the carbonization chambers 2,
A dry main 7 is connected to all of the riser pipes 6, and coke oven gas generated by carbonization of coal using heat from the combustion chamber 3 is configured to be sent to the refining equipment 8 through the riser pipes 6 and the dry main 7. There is.

More specifically, as shown in FIG. 2, the riser pipe 6 is arranged vertically, and the dry main connecting pipe 7 is arranged horizontally at the upper end 6a of the riser pipe 6.
The aforementioned dry main 7 is connected via a,
A shutoff device 10 that can be opened and closed is provided between the riser pipe 6 and the dry main 7. Further, vertically arranged riser pipe extension portions 6b are provided above the upper end portion 6a of the riser pipe 6 via the opening/closing device 11, respectively.
The upper end 6c of the riser pipe extension 6b is connected to the waste gas recovery pipe 9 via a horizontally arranged waste gas connection pipe 9a, and further includes a heat recovery device 12 and a dust collector 1.
3. Connect the blower 14 and stack 15 to the waste gas recovery pipe 9, and then, by manual operation of the shutoff device 10 and the opening/closing device 11, when the dry main 7 finishes recovering the coke oven gas, the coke is carbonized. During the period between the discharge from the chamber 2 and the insertion of new coal, high-temperature coke oven gas with low combustible components and air are introduced into the coking chamber 2 through the coal charging port 4 by removing the cover 16. The heat energy contained in the combustion gas thus obtained can be effectively utilized by a heat recovery device 12, and the gas can be removed by a dust collector 13 and released into the atmosphere.

An extruder 17 is installed on one horizontal side of the furnace body 1, and a fire extinguisher 18 is installed on the horizontal side of the furnace body 1, so that they can be moved and operated in the direction in which the carbonization chambers 2 are arranged side by side, so that all of the carbonization chambers 2 can be selectively operated. Furthermore, when the carbonization is completed, the coke in the carbonization chamber 2 can be collected by an extruder 17 into a fire extinguisher 18.

Next, another example will be described.

The specific structure and operation configuration of the closing device 10 and the opening/closing device 11 can be changed in various ways. For example, the two devices 10 and 11 may be linked so that they are opened and closed in a contradictory manner, or the two devices 10 and 11 may be It may be configured to automatically open and close in a contradictory manner based on the detection of a change in the state of the carbonization chamber 2.

The heat recovery device 12 may include one or more of a preheating device for combustion air supplied to the combustion chamber 3, a waste heat boiler, and other suitable devices.

The dust collector 13 can be selected from a dry type, a wet type, or any other suitable type, but may be omitted in some cases.

The number of carbonization chambers 2 provided in the furnace body 1, or
The number of furnace bodies 1 to which the heat recovery device 12 is connected is not limited.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway schematic plan view of a coke oven, and FIG. 2 is an explanatory view of the main parts. 2... Carbonization chamber, 6... Rising pipe, 7... Dry main, 9... Waste gas recovery pipe, 10... Shutoff device,
11...Switching device, 12...Heat recovery device.

Claims (1)

[Scope of Claims] 1. A vertically arranged riser pipe 6 connected to each of the carbonization chambers 2, and a horizontally arranged dry main connecting pipe 7a connected to the upper end 6a of the riser pipe 6. a dry main 7, and the riser pipe 6.
The coke oven is equipped with a shutoff device 10 that can be opened and closed between the dry main 7 and the dry main 7, and above the upper end 6a of the riser pipe 6,
Vertically arranged riser pipe extension part 6 via opening/closing device 11
b, and the upper end 6c of the riser pipe extension 6b is connected to the waste gas recovery pipe 9 through a horizontally arranged waste gas connection pipe 9a, and the heat recovery device 12 is connected to the waste gas recovery pipe 9. A coke oven equipped with a dust collector 13 and a dust collector 13 in the order listed.