KR101206483B1 - Device for preventing attatched carbon in ascension pipe of coke oven - Google Patents

Abstract

In order to minimize the formation of carbon inside the riser, the iron shell forming the outer appearance of the riser of the coke oven, and the refractories are installed at intervals in the inner shell, penetrated through the refractory formed between the refractory and the iron shell It provides a plurality of injection holes in communication with the inner passage, connected to the inner passage to supply the inert gas into the inner passage to prevent the combustion of the combustible material including a gas supply unit for the coke oven rise pipe inner carbon attachment preventing device. .

Description

DETECTION FOR PREVENTING ATTATCHED CARBON IN ASCENSION PIPE OF COKE OVEN}

The present invention relates to a coke oven plant. More particularly, the present invention relates to a carbon adhesion preventing device that is capable of preventing carbon from adhering to the riser of a coke oven.

In general, a coke oven is a facility for manufacturing coke by indirectly heating coal charged in a carbonization chamber. Coal is charged to the carbonization chamber by a charging car, and a large amount of gas and dust generated during the charging process of the coal is discharged to the reprocessing facility through the ascension pipe.

The riser is configured to send a gas generated in the carbonization chamber to the gas collecting tube. The riser is a pipe-shaped structure, the interior of the refractory structure is built. Accordingly, the generated gas generated in the carbonization chamber passes through the inside of the rising pipe and is transferred to the gas collecting pipe. In this process, as the combustible materials such as coal and tar in the generated gas are burned, carbon adheres to the refractory surface of the riser.

If the operation is continued without removing such carbon, the deposition amount of carbon continues to increase to close the riser. As a result, the gas generated in the coke oven is not smoothly transported to the reprocessing facility, and the air is emitted in a large amount with the flame to the extruder leveler side of the door and the charging vehicle charging device of the coke oven. In addition, various problems, such as damage to the associated equipment such as charging vehicle charging device and extruder leveler charged in the coke oven.

Conventionally, the inside of the riser tube is cleaned by hand to remove the attached carbon. However, since the cleaning of the inside of the riser is performed at a long distance by continuously generating gas and heat, the cleaning of the bottom of the riser is not only very difficult but also very difficult to completely clean. In addition, since the riser is high, the internal cleaning by hand is performed up to a certain height, so the risk of safety accident is accompanied.

Accordingly, the present invention provides an apparatus for preventing carbon attachment inside the coke oven riser tube, which minimizes the formation of carbon inside the riser tube.

The present invention also provides an apparatus for preventing carbon attachment inside a coke oven riser tube which can easily remove carbon attached to the inside of the riser.

To this end, the present invention is a plurality of injections that communicate with the inner shell formed through the iron shell forming the outer appearance of the riser of the coke oven, the refractories are spaced in the inner shell, the refractories are formed between the refractories and the iron shell A hole may be connected to the inner passage to supply an inert gas to the inner passage to include a gas supply unit for preventing combustion of the combustible material.

The apparatus may further include an air supply unit connected to the inner passage to supply combustion air to the inner passage to combust the attached carbon.

The gas supply unit supplies a supply pipe connected to the inner passage, an inert gas supply line connected to the supply pipe, an open / close valve installed on the inert gas supply line, an inert gas supply tank and pump connected to the inert gas supply line. It may include.

The air supply unit may include a supply pipe connected to the inner passage, an air supply line connected to the supply pipe, an open / close valve installed on the air supply line, an air tank connected to the air supply line, and a pump.

The apparatus is installed on the outer circumferential surface of the ascension pipe and connected to the supply pipe to preheat the inert gas or air, and connect the preheating jacket and the inner passage to supply the preheated inert gas or air to the inner passage. It may further include a connector.

According to the present apparatus as described above, in the dry distillation operation, inert gas is blown into the riser to prevent combustion of combustible materials such as tar, thereby minimizing carbon formation.

In addition, after the dry distillation operation, by supplying combustion air into the riser to burn a small amount of carbon attached to the riser, carbon can be easily removed.

This can reduce the workload for carbon removal, and can maintain the passage of the riser in an appropriate state to improve the quality of the coke and minimize the environmental pollution.

1 is a schematic view showing a riser of a coke oven equipped with a carbon adhesion preventing device according to the present embodiment.
Figure 2 is a side cross-sectional view showing an internal carbon attachment preventing device of the riser according to the present embodiment.
3 is a plan sectional view showing an inner carbon attachment preventing device of the riser according to the present embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. As can be easily understood by those skilled in the art, the embodiments described below may be modified in various forms without departing from the concept and scope of the present invention. Where possible the same or similar parts are represented with the same reference numerals in the drawings.

All terms including technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. Predefined terms are further interpreted as having a meaning consistent with the relevant technical literature and the present disclosure, and are not to be construed as ideal or very formal meanings unless defined otherwise.

1 shows a riser of a coke oven equipped with a carbon adhesion preventing device according to the present embodiment.

As shown, the coke oven has a carbonization chamber 100 into which coal is charged and dried. Coal is charged into the carbonization chamber by moving the charging vehicle 110 provided on the top of the coke oven, and the dry coke is extruded from the carbonization chamber 100 and then transferred to a post process. The coke oven gas COG generated when the coal is carbonized in the coke oven is discharged through the rising pipe 10 above the carbonization chamber 100. The rising pipe 10 is provided with a gas collecting pipe 130 through a curved pipe 120 so that the coke oven gas discharged through each of the rising pipes 10 is provided in the gas collecting pipe 130. Is collected. It is then sent to a reprocessing facility for processing.

The rising pipe 10 is a vertical passage connected to the carbonization chamber 100, a steel bar 12 forming an outer shape in a cylindrical tube structure, and a refractories 14 built in the steel bar 12 to block heat transfer. Is done. In addition, the upper part of the rising pipe 10 is provided with a rising pipe cover 11 to open and close the upper end of the rising pipe 10 as necessary.

The riser cover 11 is closed while the drying operation is in progress in the carbonization chamber 100. Accordingly, the discharge gas containing combustible materials such as pulverized coal or tar generated in the dry distillation process is transferred to the gas collecting tube through the rising pipe 10. When the carbonization chamber 100 is dried, the discharge gas is hardly generated. Therefore, the riser cover 11 is opened and the extrusion operation is performed.

As shown in Fig. 2 and 3, the apparatus is installed in the riser 10, the combustion of combustible materials such as pulverized coal, tar, etc. contained in the exhaust gas in the riser 10 during the drying operation. It prevents carbon formation by preventing it.

To this end, as shown in FIG. 2, the refractories 14 are constructed at intervals inside the bar 12 to form the outline of the riser 10, and thus, between the bar 12 and the refractory 14. The inner passage 16 is formed, and the refractory 14 has a structure in which a plurality of injection holes 18 communicating with the inner passage 16 are formed at intervals. The apparatus includes a gas supply unit connected to the inner passage 16 to supply an inert gas to the inner passage 16 to prevent combustion of a combustible material such as fine powder or tar contained in the exhaust gas.

In addition, the present apparatus has a structure in which combustion air is injected into the riser 10 to burn and remove carbon attached to the refractory 14 during the operation of extruding coke after completion of the dry distillation operation.

To this end, the apparatus further includes an air supply unit connected to the inner passage 16 to supply combustion air to the inner passage 16 to combust the attached carbon.

As such, the apparatus supplies inert gas or combustion air to the inner passage 16 according to the working process of the coke oven to prevent carbon formation in advance and remove the adhered carbon.

In the present embodiment, the inert gas may be nitrogen gas, but is not limited thereto. In addition, oxygen may be used instead of the combustion air.

As shown in FIG. 3, the refractory 14 constructed in the shell 12 of the riser 10 is constructed spaced a predetermined distance apart from the inner circumferential surface of the shell 12 to form an internal passage 16 between the shell 12. ). Reference numeral 19 is a support bracket which is installed between the shell 12 and the refractory 14 to support the refractory 14 spaced apart from the shell 12.

The inner passage 16 is a gap between the shell 12 and the refractory 14, and is formed along the inner circumferential surface of the shell 12 to serve as a common conduit for connecting the respective injection holes 18 formed in the refractory 14. Will be

In the present embodiment, the injection hole 18 is formed to be inclined upward from the outside of the refractory 14 to the inside. That is, as shown in Figure 2, the rising pipe 10 is formed at a predetermined angle inclined upward in the vertical state. The inert gas or air through the injection hole 18 forms a fluid flow upward in the riser 10.

The gas supply part may include a supply pipe 20 connected to the inner passage 16, an inert gas supply line 30 connected to the supply pipe 20, and an on / off valve installed on the inert gas supply line 30. 32), an inert gas supply tank 34 and a pump 36 connected to the inert gas supply line 30.

Accordingly, when the on-off valve 32 on the inert gas supply line 30 is opened, the gas in the inert gas supply tank 36 is driven along the inert gas supply line 30 according to the driving of the pump 34. Is supplied. Therefore, the inert gas can be introduced into the riser 10 through the injection hole 18 of the refractory 14.

In addition, the air supply line 40 is connected to the supply pipe 20, the on-off valve 42 is installed on the air supply line 40, the air tank 44 connected to the air supply line 40 and Pump 46.

As such, the inlet gas supply line 30 and the air supply line 40 are connected to the supply pipe 20. In response to the operation of the on-off valve 32 installed on the inert gas supply line 30 and the on-off valve 42 installed on the air supply line 40, an inert gas or air is selectively raised through the supply pipe 20. (10) It is supplied to the inside.

On the other hand, the apparatus is configured to preheat the inert gas or air supplied into the riser 10 before the riser 10 is introduced.

To this end, the apparatus is installed on the outer circumferential surface of the steel shell 12 of the rising pipe 10 and connected to the supply pipe 20 to preheat the inert gas or air, and the preheating jacket 50 and the It further includes a connecting pipe 52 for connecting the inner passage 16 to supply the preheated inert gas or air to the inner passage 16.

The preheating jacket 50 is installed to surround the outer circumferential surface of the steel shell 12 of the ascension pipe 10 and has a structure for transferring heat to the inert gas or air introduced therein. The preheating jacket 50 may have a structure in which a duct through which an inert gas or air passes is formed in a zigzag form or merely formed a space portion, and is not particularly limited.

The supply pipe 20 is connected to the lower portion of the preheating jacket (50). The connecting pipe 52 is connected to the upper portion of the preheating jacket 50 and extends downward to be connected to the lower portion of the inner passage 16. The inert gas or air supplied through the supply pipe 20 flows into the lower portion of the preheating jacket 50 and is heated through the preheating jacket 50 and moved to the upper side, and then connected to the upper portion of the preheating jacket 50. Through the inner passage 16 is supplied.

In the present embodiment, one connecting pipe 52 may be provided as shown in FIG.

Hereinafter, the operation of the apparatus will be described.

When the coal is charged into the carbonization chamber 100 of the coke oven and the drying operation is performed, exhaust gas containing combustible materials such as pulverized coal or tar is generated as a by-product during coal drying. The exhaust gas is transferred to the gas collecting tube 130 through the rising pipe 10 connected to the carbonization chamber 100. Here, during the dry working, the riser cover 11 installed at the top of the riser 10 is closed.

The apparatus prevents carbon formation by preventing the combustion of combustible materials such as coal and tar in the form of fine powder contained in the exhaust gas by supplying an inert gas into the riser 10 during the drying operation as described above. Done.

That is, this apparatus opens and closes the open / close valve 32 installed in the inert gas supply line 30 during the dry distillation operation, and the open / close valve 42 installed in the air supply line 40 operates closed.

In response to the driving of the pump 34, the inert gas in the inert gas supply tank 36 is transferred to the supply pipe 20 through the open inert gas supply line 30, and the preheating jacket 50 is supplied through the supply pipe 20. Will enter. The inert gas heated while passing through the preheating jacket 50 is supplied to the inner passage 16 inside the riser 10 through the connection pipe 52.

The inert gas supplied to the inner passage 16 is injected from the front of the refractory 14 through the injection hole 18 communicating with the inner passage 16. The inert gas injected into the riser 10 prevents the combustible material contained in the exhaust gas from burning. Therefore, it is possible to fundamentally block the generation of carbon generated during exhaust gas combustion.

On the other hand, when dry distillation is completed and the coke extruding operation is performed, the damper 122 of the curved pipe 120 is closed and the riser cover 11 is opened. In this case, the closing valve 32 installed in the inert gas supply line 30 is operated to stop the supply of the inert gas. Then, air is supplied into the riser 10 to incinerate and remove a small amount of carbon formed in the riser 10.

When the on-off valve 42 installed in the air supply line 40 of the device is opened, air is transferred from the air tank 46 to the supply pipe 20 through the air supply line 40 in accordance with the operation of the pump 44. Then, it enters the preheating jacket 50 through the supply pipe 20. The inert gas heated while passing through the preheating jacket 50 is supplied to the inner passage 16 inside the riser 10 through the connection pipe 52.

The air supplied to the inner passage 16 is injected from the front of the refractory 14 through the injection hole 18 in communication with the inner passage 16. The air injected into the riser 10 as described above rises inside the riser 10 to burn carbon attached to the refractory 14 together with the residual gas. The carbon attached to the refractory 14 in the riser 10 is incinerated and removed.

Here, the inert gas and air are supplied into the riser 10 in a preheated state while passing through the preheating jacket 50, thereby minimizing a temperature shock on the refractory 14.

While the illustrative embodiments of the present invention have been shown and described, various modifications and alternative embodiments may be made by those skilled in the art. Such variations and other embodiments will be considered and included in the appended claims, all without departing from the true spirit and scope of the invention.

10: riser 11: riser cover
12: iron 14: refractory
16: internal passage 18: injection hole
20: supply pipe 30: inert gas supply line
32,42: On-off valve 40: Air supply line
50: preheat jacket 52: connector

Claims (5)

A plurality of injection holes which form an outer shell of the ascending pipe of the coke oven, a refractory installed at intervals in the inner shell, a plurality of injection holes penetrating through the refractory and communicating with an inner passage formed between the refractory and the shell; It is connected with and supplies an inert gas to the inner passage to prevent the combustion of the combustible material, including a gas supply unit,
It is installed to surround the outer circumferential surface of the ascension pipe and is connected to the gas supply unit to connect a preheating jacket to preheat the inert gas or air, and connect the preheating jacket to the inner passage to supply the preheated inert gas or air to the inner passage. Inner carbon attachment preventing device for the coke oven rising pipe further comprising a tube. The method of claim 1,
The gas supply unit supplies a supply pipe connected to the preheating jacket, an inert gas supply line connected to the supply pipe, an open / close valve installed on the inert gas supply line, an inert gas supply tank and pump connected to the inert gas supply line. Coke oven lift pipe containing carbon attachment prevention device. The method according to claim 1 or 2,
And an air supply unit for supplying combustion air to the inner passage to combust the attached carbon. The method of claim 3, wherein
The air supply unit rises the coke oven including a supply pipe connected to the preheating jacket, an air supply line connected to the supply pipe, an open / close valve installed on the air supply line, an air tank connected to the air supply line, and a pump. Carbon attachment prevention device inside pipe. delete

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