KR20110029944A - Device for preventing drop of temperature of cdq plant - Google Patents

Abstract

PURPOSE: A temperature drop preventing apparatus for a CDQ(Coke Dry Quenching) facility is provided to maintain a proper temperature in a furnace by compensating the reduction of combustible gas in circulating gas, caused by the opening delay of a chamber. CONSTITUTION: A temperature drop preventing apparatus for a CDQ facility comprises a gas duct(10), an injection nozzle, and a supply line. The gas duct is installed along the outer periphery of a charging chute located on the upper side of the chamber of the CDQ facility. The injection nozzle is connected to the inside of the charging chute and sprays sealing gas into the charging chute. The supply line is connected to one side of the gas duct in order to provide the sealing gas.

Description

DEVICE FOR PREVENTING DROP OF TEMPERATURE OF CDQ PLANT}

The present invention relates to a CDQ facility. More specifically, the present invention relates to a temperature drop prevention device that can prevent a sudden drop in the furnace temperature due to the opening of the charging hole.

In general, CDQ (Coke Dry Quenching) equipment is a facility for dry extinguishing the red-light coke extruded from the coke oven. The CDQ facility includes a chamber into which the red coke is charged, and a charging chute is installed on the charging hole formed in the upper portion of the chamber.

The red coke extruded from the coke oven is contained in a bucket which is transferred to a crane and transferred to the charging hole at the top of the chamber. When the charging inlet cover is opened, the charging chute is interlocked and moved to the upper entrance. When the charging slot of the chamber and the positions of the charging chute and the bucket coincide, the bucket is down by the crane and charging of the coke is carried out.

Problems such as refractory damage due to a sudden temperature drop inside the chamber due to equipment failure such as a position sensor in the charging process as described above.

In other words, when equipment trouble occurs in a state where the charging chute is located on the charging inlet of the chamber and the charging cover is open, the furnace internal temperature is drastically lowered as the charging inlet is opened for a long time. As such, a decrease in the internal temperature may cause problems such as damage to the refractory in the chamber.

Therefore, even if the charging opening is opened for a long time by the equipment trouble, it provides a device for preventing the temperature drop of the CDQ equipment to minimize the temperature drop inside the chamber to prevent a sudden change in furnace temperature.

To this end, the device may be installed in a charging chute located above the chamber of the CDQ facility may include a blocking unit for selectively blocking the pipeline of the charging chute.

The blocking unit is a gas duct installed along the outer circumferential surface of the charging chute, the injection nozzle is installed at intervals along the gas duct and communicated into the charging chute to inject a sealing gas into the charging chute, one side of the gas duct It may be connected to the supply line for supplying a sealing gas.

Here, the sealing gas may be air.

In addition, the blocking unit may have a structure in which the supply line is connected to the CDQ facility to receive a high temperature circulating gas generated from the CDQ facility.

In addition, the injection nozzle may be inclined to one side at an angle with respect to the radial direction of the charging chute to have a structure for injecting the sealing gas. The sealing gas injected by the injection nozzle is gathered to the center while rotating along the circumferential direction in the charging chute to prevent the loss due to the collision of the sealing gas injected from each injection nozzle.

In addition, the injection nozzle may be a structure in which a portion of the sealing gas is sprayed upward at an angle from the horizontal plane relative to the horizontal plane, and the remainder is injected downward at an angle from the horizontal plane.

Herein, the injection amount injected upward may be 5 to 15% of the total injection amount.

In addition, the apparatus may further include a combustion unit for maintaining the temperature inside the chamber.

The combustion unit is an injection duct installed along the outer circumferential surface of the charging chute, an injection nozzle installed at intervals along the injection duct and communicating with the charging chute to inject combustion gas into the charging chute, and one side of the injection duct. It is connected to include a supply for supplying a gas for combustion.

The supply unit supplies an injector installed on an air line connected to the injection duct, a water tank connected to the injector to supply water, and a high pressure air connected to the injector to atomize the water in the water tank in a fine state. It may include an air tank.

Accordingly, the water is finely sprayed into the charging chute to generate and supply aqueous hydrogen gas, thereby maintaining the furnace temperature by burning the hydrogen gas.

The injection duct may be spaced apart below the gas duct.

In addition, the injection nozzle of the combustion unit may be arranged in the radial direction of the charging chute to inject a combustion gas toward the center of the charging chute.

In addition, the injection nozzle may have a structure that injects the combustion gas to the lower side of the horizontal plane based on the horizontal plane.

In addition, a space layer may be formed between the sealing gas layer by the blocking unit and the combustion gas layer by the combustion unit.

In this way, the apparatus can prevent the internal temperature of the chamber by blocking the conduit of the charging chute with an air curtain structure when the charging cover of the chamber is opened for a long time.

In addition, when the flammable gas in the circulating gas is reduced according to the delay of the opening time of the chamber, the combustion gas is supplied and combusted to prevent the furnace temperature from dropping and maintain the furnace temperature appropriately.

Accordingly, it is possible to prevent equipment damages such as refractory due to a sudden change in furnace temperature.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

The drawings are schematic and illustrate that they are not drawn to scale. The relative dimensions and ratios of the parts in the figures have been exaggerated or reduced in size for clarity and convenience in the figures and any dimensions are merely exemplary and not limiting. And the same structure, element or part that appears in more than one figure the same reference numerals are used in different embodiments to indicate corresponding or similar features.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a,” “an,” and “the” include plural forms as well, unless the phrases clearly indicate the opposite. As used herein, the term "comprising" embodies a particular characteristic, region, integer, step, operation, element, and / or component, and other specific characteristics, region, integer, step, operation, element, component, and / or group. It does not exclude the presence or addition of.

Embodiments of the invention described with reference to a perspective view specifically illustrate an ideal embodiment of the invention. As a result, various variations of the illustration, for example variations in the manufacturing method and / or specification, are expected. Thus, the embodiment is not limited to any particular form of the depicted area, but includes modifications of the form, for example, by manufacture. The regions shown in the figures are only approximate in nature, and their forms are not intended to depict the exact form of the regions and are not intended to narrow the scope of the invention.

1 shows a CDQ installation having a temperature drop prevention apparatus according to the present embodiment.

As shown, the charging chute 200 is installed at the top of the charging hole 110 of the chamber 100 constituting the CDQ facility. The bucket 300 which is moved by the crane to the charging chute 200 is located. In addition, the CDQ facility is provided with a circulating gas treatment facility 400 for recirculating the gas generated during the process into the chamber 100 on one side.

The red coke extruded from the coke oven is contained in the bucket 300 is transferred to the crane is transferred to the charging hole 110 of the top of the chamber 100. When the charging inlet cover is opened, the charging chute 200 is interlocked to move to the upper charging inlet 110. When the positions of the charging inlet 110 and the charging chute 200 and the bucket 300 of the chamber 100 coincide with each other, the bucket is down by the crane to charge the coke.

In this case, the device is installed in the charging chute 200 to block the internal pipe of the charging chute 200 to prevent the furnace temperature from suddenly lowered when the charging cover is opened for a long time when equipment trouble. .

As shown in FIG. 1 and FIG. 2, the apparatus is installed at intervals along the gas duct 10 and a gas duct 10 installed surrounding the charging chute 200 along an outer circumferential surface of the charging chute 200. And a supply nozzle 14 connected to one side of the charging chute 200 to inject the sealing gas into the charging chute 200 and connected to one side of the gas duct 10 to supply a sealing gas. ).

In this case, the charge chute 200 inner pipe is blocked by the air curtain hit the gas injected along the inner circumferential surface. Therefore, even when the charging inlet 110 of the chamber 100 is open, the inside of the chamber 100 can be insulated from outside air.

The gas duct 10 is a ring-shaped pipe structure, and is installed to surround the outer circumferential surface in the middle of the charging chute 200. The injection nozzles 12 are installed at intervals along the gas duct 10. The injection nozzle 12 may be installed in such a number that the air curtain can be formed on the pipeline of the charging chute 200 by the injected sealing gas. The number and spacing of the injection nozzles 12 are not particularly limited.

In this embodiment, the supply line 14 has a structure connected to the circulating gas treatment facility 400 of the CDQ facility. As shown in FIG. 1, the supply line 14 is connected to the pressure control pipe 410 of the circulating gas treatment facility 400. Therefore, the supply line 14 receives the high temperature circulating gas from the circulating gas treatment facility 400. Here, the circulating gas refers to the hot gas generated from the CDQ facility. The circulating gas has a temperature of about 170 ° C. In this way, by using the high-temperature circulating gas as the sealing gas to be injected into the charging chute 200 pipe line it is possible to prevent the surrounding of the charging port 110 is cooled by the sealing gas.

In addition, the apparatus further includes a combustion unit for maintaining the temperature inside the chamber 100 when the charging inlet 110 of the chamber 100 is opened for a long time. When the charging inlet 110 of the chamber 100 is opened for a long time, the equipment does not operate normally, and the content of hydrogen, which is a combustible gas in the circulating gas, is gradually lowered. As such, when the content of the combustible gas is lowered, in order to maintain the internal temperature of the chamber 100, the combustion air is supplied into the chamber 100 as in the related art, and thus hydrogen cannot be combusted.

Accordingly, the combustion unit is configured to supply and burn combustion gas into the chamber 100 when the combustible components included in the circulating gas circulated and supplied from the circulating gas processing facility 400 gradually decrease.

To this end, the combustion unit is installed along the injection duct 20 along the outer circumferential surface of the charging chute 200, is installed at intervals along the injection duct 20 and communicated to the charging chute 200 inside the charging chute ( 200, an injection nozzle 22 for injecting combustion gas into the inside and a supply part connected to one side of the injection duct 20 to supply the combustion gas.

The supply unit includes an injector 30 installed on an air line 24 connected to the injection duct 20, a water tank 32 connected to the injector 30 to supply water, and the injector 30. It is connected to the air tank 34 to supply a high-pressure air to atomize the water in the water tank 32 in a fine state.

The injector 30 finely granulates water by using high pressure air to supply a combustion gas containing an aqueous hydrogen component to the injection duct 20. Accordingly, the finely granulated aqueous hydrogen gas is injected into the charging chute 200 through the injection nozzle 22 of the injection duct 20. By supplying the hydrogen gas as a combustible component through the charging chute 200, the furnace temperature may be maintained by the combustion of the hydrogen gas.

The adjustment of the hydrogen component contained in the air is achieved by controlling the valve 38 installed on the water pipe 36 connected to the injector 30 from the water tank 32.

The injection duct 20 is a ring-shaped pipe structure, is installed surrounding the outer peripheral surface in the middle portion of the charging chute 200. The injection nozzles 22 are installed at intervals along the injection duct 20. The number and spacing of the injection nozzles 22 are not particularly limited.

3 illustrates a state in which the sealing gas and the combustion gas are injected into the charging chute.

As shown, the injection nozzles 12 and 22 are disposed at intervals along the inner circumferential surface of the charging chute 200 to inject the sealing gas and the combustion gas toward the center. In FIG. 3, the injection direction of the sealing gas and the injection direction of the combustion gas are different, which will be described later.

In the present embodiment, the injection duct 20 is spaced apart below the gas duct 10. That is, in FIG. 1, the injection duct 20 is positioned along the Y-axis direction and the gas duct 10 is disposed below. The spacing between the injection duct 20 and the gas duct 10 is not particularly limited. By the arrangement structure described above, the charging chute 200 is blocked with the sealing air at a relatively upper side from the charging opening of the chamber 100, and if necessary, the combustion gas is supplied into the chamber 100 at the lower side and combusted. do.

4 and 5 illustrate a sealing gas injection structure by the injection nozzle of the blocking unit.

As shown, a plurality of injection nozzles 12 are arranged along the inner circumferential surface of the charging chute 200. The sealing gas injected from the injection nozzle 12 is injected toward the center from the entire inner circumferential surface of the charging chute 200 to form a gas layer in the pipeline of the charging chute 200. The gas layer serves as an air curtain to block the conduit of the charging chute 200.

In this embodiment, each injection nozzle 12 of the blocking part is inclined to one side at an angle in the radial direction of the charging chute 200 to inject a sealing gas. That is, the injection nozzle 12 is configured to inject the sealing gas toward the side surface with respect to the center of the charging chute 200.

The sealing gas injected by the injection nozzle 12 is collected in the center of the charging chute 200 while rotating along the circumferential direction in the charging chute 200. This flow minimizes direct collision of the sealing gas injected from the respective injection nozzles 12, thereby preventing the sealing defect from occurring due to the gas leakage caused by the collision.

In addition, as shown in FIG. 6, the injection nozzle 12 is a structure in which a part of the sealing gas is sprayed upward at an angle in the horizontal plane based on the X axis, which is a horizontal plane, and the others are sprayed downward at an angle in the horizontal plane. Can be.

The sealing gas injected upward in the horizontal plane pushes the outside air out of the charging chute 200 to prevent the outside air from flowing into the chamber 100. In addition, the remaining sealing gas injected downward from the horizontal plane enters the inside of the chamber 100 while rotating, thereby preventing the high heat inside the chamber 100 from being released to the outside.

In the present embodiment, the injection amount injected upward based on the horizontal X axis may be 5 to 15% of the total injection amount of the sealing gas through the injection nozzle 12.

When the injection amount of the sealing gas injected above the horizontal plane is 5% or less, there is a fear that outside air may intrude into the chamber 100. When the injection amount of the sealing gas injected above the horizontal plane is 15% or more, it becomes a wasteful factor of the sealing gas and the amount of the gas flowing into the chamber 100 decreases, and there is a fear of high heat inside the chamber 100.

6 and 7 illustrate a gas injection structure for combustion by the injection nozzle of the combustion unit.

As shown, a plurality of injection nozzles 22 are disposed along the inner circumferential surface of the charging chute 200. The combustion gas injected from the injection nozzle 22 is injected toward the center from the entire inner circumferential surface of the charging chute 200.

In this embodiment, the injection nozzle 22 of the combustion unit is arranged in the radial direction of the charging chute 200 to inject a combustion gas toward the center of the charging chute 200.

In addition, as illustrated in FIG. 7, the injection nozzle 22 is configured to inject a combustion gas to a lower side of the horizontal plane based on the X axis, which is a horizontal plane.

In this way, the combustion gas is not injected above the horizontal plane so that the combustion gas does not interfere with the sealing state of the sealing gas layer by the upper blocking portion. In addition, the combustion gas forms a combustion gas layer under the sealing gas layer to form a space layer G between the sealing gas layer and the combustion gas layer. Such a space layer further increases the effect of preventing the lowering of the temperature of the chamber 100.

In the present embodiment, the combustion gas is not injected upward based on the horizontal X axis, but only downward.

Hereinafter, the operation of the apparatus will be described.

When the bucket is moved to the charging chute 200 and the cover of the charging port 110 of the chamber 100 is opened, the glowing coke is charged into the chamber 100 through the charging chute 200.

In this process, if the equipment trouble occurs in the state in which the charging inlet 110 of the chamber 100 is opened, the opening of the charging inlet 110 continues.

In this case, the apparatus installed in the charging chute 200 is driven to block the conduit of the charging chute 200 to maintain the maximum temperature inside the chamber 100.

That is, the valve 40 of the supply line 14 connected to the circulating gas treatment facility 400 is opened so that the circulating gas is supplied to the supply line 14.

The circulating gas flows into the gas duct 10 connected to the supply line 14 and is injected to the inner circumferential surface of the charging chute 200 through the injection nozzle 12 installed in the gas duct 10.

The circulating gas injected toward the center from the inner circumferential surface of the charging chute 200 forms a sealing gas layer on the charging chute 200. Accordingly, the sealing gas layer acts as an air curtain to block the pipeline of the charging chute 200. Therefore, even if the charging inlet 110 is open, it is possible to prevent the outside air from flowing into the charging inlet 110 or the high temperature in the furnace from escaping to the outside, thereby preventing the furnace temperature from falling.

On the other hand, if the charge opening 110 is continued in the state in which the charging chute 200 is blocked with circulating gas, the combustible component is lowered in the circulating gas supplied into the furnace. As a result, the furnace temperature is lowered.

As described above, when the furnace temperature falls below the management range, the apparatus supplies combustion gas containing combustible components into the furnace, thereby preventing the furnace internal temperature from falling and maintaining the furnace internal temperature.

When the furnace temperature is lowered, the supply of the combustion air to burn the circulating gas is cut off. In normal operation, combustion air is supplied for combustion of the circulating gas. However, when the combustion gas is supplied in a state where the combustion component is lowered in the circulating gas, the temperature in the chamber is drastically reduced by the combustion gas. First, the supply of combustion air is stopped by blocking the valve 130 of the air pipe 120 for supplying combustion air to the chamber 100.

When the valve 42 of the air line 24 having the injector 30 is opened, the high pressure in the air tank 34 is injected by the injector 30 to the injection duct 20 through the air line 24. Inflow. In this process, the water in the water tank 32 connected to the injector 30 is sucked up by the injection pressure of the air and is finely atomized and sprayed with the air. Accordingly, the gas introduced into the injection duct 20 includes the refined aqueous hydrogen component, which is a combustible component.

As such, the combustion gas containing the hydrogen component is injected into the charging chute 200 through the injection nozzle 22 installed in the injection duct 20. Combustion gas injected into the charging chute 200 is introduced into the chamber 100 through the open charging port 110 and burned. The furnace temperature is raised by the combustion of hydrogen gas can be maintained continuously.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Of course.

1 is a schematic diagram illustrating a CDQ facility in which a temperature drop prevention apparatus according to the present embodiment is installed.

2 is a schematic diagram showing the configuration of a temperature drop prevention apparatus installed in a charging chute according to the present embodiment.

3 is a schematic plan view for explaining the operation of the temperature drop prevention apparatus according to the present embodiment.

4 and 5 are schematic views for explaining the circulating gas injection structure by the temperature drop prevention apparatus according to the present embodiment.

6 and 7 are schematic views for explaining the water gas injection structure by the temperature drop prevention apparatus according to the present embodiment.

Explanation of symbols on the main parts of the drawings

10 gas duct 12 injection nozzle

14: supply line 20: injection duct

22: injection nozzle 24: air line

30: injector 32: water tank

34: air tank 36: water pipe

38,40,42: valve

Claims (10)

A gas duct installed along the outer circumferential surface of the charging chute located above the chamber of the CDQ facility, and an injection nozzle installed at intervals along the gas duct and communicating with the charging chute to inject a sealing gas into the charging chute; A device for preventing temperature drop of a CDQ facility comprising a supply line connected to one side of the gas duct to supply a sealing gas. The method of claim 1, The supply line is connected to the CDQ facility to prevent the temperature drop of the CDQ facility of the structure that receives the circulating gas generated from the CDQ facility. The method of claim 2, The respective injection nozzles are inclined to one side at an angle with respect to the radial direction of the charging chute to inject the sealing gas toward the inner peripheral surface of the charging chute structure of the CDQ facility. The method of claim 3, wherein The injection nozzle is a device for preventing the temperature drop of the CDQ equipment of the structure that injects a portion of the sealing gas on the horizontal plane to the upper side in the horizontal plane and the other side to the downward in the horizontal plane. The method of claim 4, wherein The spray nozzle is a temperature drop prevention device of the CDQ facility is 5 to 15% of the total amount of the injection sprayed upward on the horizontal plane. 6. The method according to any one of claims 1 to 5, Further comprising a combustion unit for maintaining the temperature inside the chamber, The combustion unit is an injection duct installed along the outer circumferential surface of the charging chute, an injection nozzle installed at intervals along the injection duct and communicating with the charging chute to inject combustion gas into the charging chute, and one side of the injection duct. A device for preventing a temperature drop of a CDQ installation comprising a supply connected to supply the gas for combustion. The method of claim 6, The supply unit supplies an injector installed on an airline connected to an injection duct, a water tank connected to the injector to supply water, and a high pressure air connected to the injector to atomize the water in the water tank in a fine state. Preventing the temperature drop of the CDQ equipment including an air tank. The method of claim 7, wherein The injection nozzle of the combustion unit is disposed in the radial direction of the charging chute to prevent the temperature drop of the CDQ equipment of the structure to inject the combustion gas toward the center of the charging chute. The method of claim 8, The injection nozzle is a temperature drop prevention device of the CDQ equipment having a structure for injecting the combustion gas to the horizontal plane below the horizontal plane. The method of claim 9, A device for preventing temperature drop of a CDQ facility, wherein the sealing gas layer by the blocking unit and the combustion gas layer by the combustion unit are spaced apart to form a space layer.

Images