JPS62285981A - Method of disposing gas generated during charging of coke oven with coal - Google Patents

Abstract

PURPOSE:To recover gas in an efficient, non-polluting, low-cost manner without gas leakage, by sucking the coke oven gas generated in a carbonization chamber through a riser pipe, a connecting pipe communicating therewith, etc., from a gas exhaust vent into a dry main. CONSTITUTION:Coal 12 on a charging car 10 is fed through a coal charge tube 16 and coal hoppers 14 into a carbonization chamber 18 for carbonization thereof. The generated coke oven gas 6 is sucked through a riser pipe 2 and an ammoniacal liquor nozzle 4 into a dry main 8. Concurrently, the oven gas is sucked from a gas exhaust vent 26 having a lid 28 disposed between a plurality of the above-mentioned coal hoppers 14, while repeatedly opening and closing the lid 28, through a connecting pipe 30 and a movable connecting pipe connector 32 into a dry main 8. Thereafter, a stack of coal produced in the oven at the final stage of the coal charge is leveled by the use of a leveler 34. At this time, the gas 6 enclosed in the advance direction of the leveler 34 is also sucked from each gas exhaust vent 26 without leakage.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for treating gas generated during coke oven coaling,
In particular, the present invention relates to a method for treating gas generated during coal charging that can prevent leakage.

[Conventional technology]

As a dust gas treatment method when charging coal into the coke oven carbonization chamber, there is a method and equipment that injects high-pressure ammonium water spray at the bend of the riser pipe to create a negative pressure inside the carbonization chamber and sucks dust and gas into the dry main. A method is known in which gas leaking from the inlet is guided to a coal charging vehicle or a dust collector installed on the ground and treated. A typical method is to use a coal charging vehicle 10 as shown in FIG.
The coal 12 is charged into the carbonization chamber 18 through the coal charging tube 16 of the coal charging port 14, and then passed through the riser pipe 2 and the ammonium water nozzle 4.
A part of the generated gas 6 is sucked into the dry main 8 by the high-pressure ammonium water spray from the dry main 8, and the gas 20 generated during coal charging that is not sucked into the dry main 8 is collected by the dust collecting pipe 22 provided at the coal charging port 14. Attracted, sI! It passes through a duct 24 and is processed by a dust collector. The coal charging port 14 is as shown in FIG.
It is commonly used for charging coal 12 and sucking generated gas 14.

In addition, in JP-A-48-61502, the dust collector is omitted by guiding the suction gas from the hood of the charging chute of the charging vehicle to the riser pipe.

Furthermore, Japanese Patent Laid-Open No. 115490/1983 proposes a method in which the gas generated in the furnace on the opposite side of the riser pipe, where the ejector effect is difficult to achieve by spraying high-pressure ammonium hydroxide, is guided to the nearby carbonization chamber through a connecting pipe. Japanese Patent Laid-Open No. 54-65701 discloses a method in which an opening is provided in the upper part of the furnace lid or in the soil of the furnace wall on the guide wheel side to guide the dust to the dust collector.

Although these methods each have their own characteristics, they still have the following problems.

(a) The method of treating generated gas outside the furnace using a dust collector discards coke oven gas, which is originally valuable as fuel.

(b) The method of using a dust collector has high equipment and operating costs.

(c) During coal charging, the inside of the furnace is affected by a curtain of falling coal.
Since the gas is divided into several positions, the gas in the middle compartment is difficult to flow to the rising pipe side or the side opposite to the rising pipe, and is likely to be ejected from the charging port. This state also occurs during leveling of charged coal using a leveler. In addition, since the flow of gas ejected from the charging port is a self-flowing flow with the falling coal, pulverized coal is likely to be dragged into the gas, resulting in a gas with a high dust concentration. This tendency is particularly strong when the charging port 14 is used both for dropping coal and sucking generated gas, as shown in FIGS. 3 and 4.

[Problem that the invention seeks to solve]

It is an object of the present invention to solve the problems of the conventional and prior art described above, and to produce a coke that can effectively recover coke oven gas generated during coal charging without containing a large amount of coal dust, and prevent smoke generation during charging. An object of the present invention is to provide a method for treating gas generated during furnace coal loading.

[Means and operations for solving the problems] The gist of the present invention is as follows.

That is, in a coke oven gas treatment method in which coke oven gas in a coke oven is sucked into a dry main through a riser pipe and an anhydrous water nozzle, a gas treatment method that includes an opening/closing lid provided between a coal charging port in the upper part of the coke oven. A method for treating gas generated during coaling in a coke oven, characterized in that a vent is opened and gas generated during coaling is sucked into the dry main through a connecting pipe that communicates the gas vent and the riser pipe. .

The details of the present invention will be explained by examples. The apparatus used in the method of the present invention will be explained with reference to FIGS. 1 and 2.

Coal 12 in the coal charging car 10 is charged through the coal charging port 14 provided at the upper part of the coking chamber 18 through the coal charging tube 16, and the coke oven gas 6 generated in the coal chamber 18 is passed through the riser pipe 2 and the ammonium water nozzle. 4 to be sucked into the dry main 8.

Although the above is similar to the conventional device, the present invention further includes the following device. That is, the carbonization chamber 18
between the coal charging port 14 at the top of the 1. A gas vent 26 is provided, and the gas vent 26 is provided with an electromagnetic opening/closing lid 28 as shown in FIG. A communication pipe 30 that communicates the gas vent 26 and the riser pipe 2 is mounted on the coal charging vehicle 10, and is connected to the riser pipe 2 by a movable communication pipe connector 32. Note that the lower part of the connecting pipe 30 and the gas vent 26
and are connected to each other as shown in FIG. 2, and are opened and closed by an opening/closing lid 28.

Next, the charging of coal in the above-mentioned apparatus will be explained. After the coal charging vehicle 10 loaded with coal stops above the carbonization chamber 18 to be charged, the charging port cover is removed and the coal charging cylinder 16 is brought into close contact with the coal charging port 14 by a known method. In parallel with this, as shown in FIG. 2, the lower end of the connecting pipe 30 is brought into close contact with the gas vent 26 and the opening/closing lid 28 is opened, while the connecting pipe connector 32 is brought into close contact with the riser pipe 2 to prepare for gas venting.

After setting the ammonium water nozzle 4 to the high pressure side, the coal cutting device of the coal charging car 10 is operated to charge the coal 12 into the carbonization chamber 18.

The riser pipe 2 sucks in the coke oven gas 6 and discharges it to the dry main 8 as before, and the communication pipe 30 of the present invention is connected to each gas outlet 2.
Coke oven gas 6 is similarly sucked from 6 and discharged to a dry main 8. Even if the carbonization chamber 18 is divided by the curtain of falling coal 12, the gas rear port 26 and the communication pipe 301
．． is provided in each compartment, so coke oven gas 6
is sucked in uniformly without being trapped in each compartment.

At the final stage of coal charging, leveling work is performed using a leveler 34 to level the holed coal pile in the furnace, but in the present invention, the gas trapped in front of the leveler 34 is sucked out from each gas outlet 26. There will be no leakage.

When charging of coal is completed, the coal charging tube 16 is removed, the charging port cover and the opening/closing cover 28 of the gas vent 26 are closed, and the dry main 8 is closed.
In order to prevent air from being sucked into the tank, the liaison connector 32 is removed from the riser pipe 2 after the pressure of the ammonium water nozzle 4 is reduced, and a series of coal charging operations is completed.

In addition, if the suction force of the ammonium water nozzle 4 is weak, the connecting pipe 30
The effects of the present invention can be further enhanced by installing a small blower in the system or by installing a damper for adjusting air volume in the communication pipe 30 leading to each gas vent 26. Further, in FIG. 1, the gas vents 26 are provided everywhere between the coal charging ports 14, but if the suction force of the connecting pipe 30 is large, they can be omitted as appropriate.

〔Effect of the invention〕

The present invention has achieved the following effects by sucking the gas generated during coal charging into the dry main through the connecting pipes from each gas outlet provided between the coal charging ports in the upper part of the carbonization chamber.

(a) Even when the carbonization chamber was divided according to the charged coal and when the leveler was operated, there was no leakage of generated gas and the environment was purified.

(b) Since the gas generated during coal loading can be recovered as fuel gas, the energy saving effect is large.

(c) Since the generated gas is sucked through the gas-dedicated outlet, the concentration of coal dust is lower than when using a conventional coal charging port, so the burden of dust removal can be reduced.

(d) Since the existing coke oven gas processing equipment is used without the need for a large-scale dust collector, construction costs and operating costs can be significantly reduced.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the generated gas treatment device used in the method of the present invention, Fig. 2 is an enlarged sectional view of the vicinity of the gas outlet in Fig. 1, and Fig. 3 is a sectional view showing the conventional generated gas treatment device. , FIG. 4 is an enlarged sectional view of the vicinity of the coal charging inlet of FIG. 3.

Claims (1)

[Claims] (1) A coke oven gas treatment method in which coke oven gas in a coking chamber is sucked into a dry main via a riser pipe and an ammonium nozzle, including an opening/closing lid provided between the coal charging ports in the upper part of the coking chamber. A method for treating gas generated during coaling in a coke oven, comprising opening a gas vent and sucking gas generated during coaling into the dry main through a connecting pipe that communicates the gas vent and the riser pipe.