KR101201771B1 - Equipment and method of recycling waste gas in ammonia loquor tank - Google Patents

Abstract

The present invention relates to an apparatus and method for reusing by-product gas of an ordinal filter tank which enables reuse of by-product gas generated during a cleaning operation of an ordinal filter tank to a coke oven, and in particular, an ordinal filter tank according to an embodiment of the present invention. The by-product gas reuse method is a method for reusing gas generated when the filter material is washed in the ordinal filter tank, and simultaneously supplying nitrogen and the washing ordination water to the ordinal filter tank and supplying the nitrogen and the washing ordinal water to the filter material. Washing the filter material by passing it; Discharging the nitrogen to clean the filter material from the ordinal filter tank; Separating impurities from nitrogen discharged from the ordination filter tank; Supplying the facility for reuse of the separated nitrogen with impurities.

Description

EQUIPMENT AND METHOD OF RECYCLING WASTE GAS IN AMMONIA LOQUOR TANK}

The present invention relates to a by-product gas reuse facility and method of the ordinal filter tank, and more particularly, by-product gas reuse facility of the ordinal filter tank to reuse the by-product gas generated during the cleaning operation of the ordination filter tank to the coke oven And to a method.

Generally, coke oven gas (COG; coke oven gas), tar, and water are generated in the coke manufacturing process using coal, and the tar and water of the product are recovered in a liquid state and coke oven is a gaseous state. The gas is collected and used as an energy source in the steel mill.

The water contains various compounds produced by chemical reactions during the dry distillation process, and is particularly referred to as ordination because it contains a large amount of ammonia.

In general, the ordination produced during the coke manufacturing process will have a variety of compounds by chemical reaction, in particular ammonia, including hydrogen cyanide and sulfur compounds hydrogen sulfide. Since such ordination corrodes process facilities and pollutes the atmosphere and the environment around them, a thorough removal is essential.

Thus, the ordination is recovered and stored in the storage tank, and then the gravel and sand is passed through the ordination filter tank filled with the filter material to remove impurities such as tar contained in the ordination.

On the other hand, the gravel and sand filled in the ordinal filter tank is carried out once a day (back washer) to remove the tar component attached to the gravel and sand.

1 is a block diagram showing a conventional ordination filter tank installation, as shown in FIG. 1 is provided with an ordination filter tank 10 filled with a filter material 11 such as gravel and sand in a central region. At this time, the filter material 11 is disposed in the central region of the ordinal filter tank 10 by a blocking network 12, 13 such as a mesh network. In the lower region of the ordinal filter tank 10, an air supply unit 20 for supplying air and ordination for cleaning the filter material 11, and an ordinal water supply unit 30 for cleaning may include a first supply line 21 and It is connected by the 2nd supply line 31, respectively.

In addition, a first discharge line 41 and a second discharge line 51 for discharging air supplied to the lower area of the ordination filter tank 10 and the washing ordination water are disposed in an upper region of the ordinal filter tank 10. Each is connected. In this case, the first discharge line 41 is a pipe for discharging air, and a vent hole 40 is installed at the end of the first discharge line 41 to exhaust the air into the atmosphere. In addition, the second discharge line 51 is a pipe for discharging the cleaning eye water, and is connected to a waste tank 50 in which the cleaning eye water for cleaning the filter material 11 is collected. In addition, the impurity separation unit 60 is installed in the first discharge line 41 to separate the impurities contained in the air exhausted from the ordination filter tank 10 and then supply to the second discharge line 51. It is provided. Unexplained reference numerals 70, 71, 80, and 81 are components used when the ordinal filter tank 10 normally purifies the ordination, 70 is an ordination supply unit for supplying unpurified ordination, and 71 is an ordination supply unit. An ordination supply pipe for supplying the ordination to the ordinal filter tank 10 at 70, 80 is an ordination reservoir for collecting purified ordination water, and 81 is an ordination tank for purification of ordination purified from the ordinal filter tank 10; ) It is a drainage pipe for ordination.

The ordination filter tank 10 as described above is supplied to the ordination filter tank 10 through the ordination supply pipe 71 in the ordination supply unit 70 to purify the ordination in normal operation. The supplied ordinal water is purified and purified while passing through the filter material 11 is discharged to the ordination storage tank 80 through the ordination discharge pipe 81.

Meanwhile, when the filter material 11 filled in the ordinal filter tank 10 is to be cleaned, air and washing ordination are supplied through the first and second supply lines 21 and 31 to the ordinal filter tank 10. Supply to the lower area of). Then, the air and the washing ordination are mixed to pass through the filter material 11, and impurities such as tar attached to the filter material are separated from the filter material 11 to the upper region of the ordinal filter tank 10 together with the cleaning ordinal water. Injured and thus, the injured impurities are discharged to the waste tank 50 through the second discharge line 51 together with the cleaning ordination. And the air which cleaned the filter material 11 is exhausted to air | atmosphere through the 1st discharge line 41. FIG. At this time, if impurities are contained in the air is separated from the impurity separation unit 60 is discharged to the waste tank (50). However, the air exhausted from the ordinal filter tank 10 contains a large number of harmful substances, which causes serious air pollution when discharged into the atmosphere.

The present invention provides an apparatus and method for reusing by-product gas of an ordinal filter tank which prevents toxic substances generated during the filter material cleaning operation of the ordinal filter tank from being released into the atmosphere.

The present invention also provides an apparatus and a method for reusing by-product gas of an ordinal filter tank capable of reusing gas generated during the preparation of filter material cleaning of the ordinal filter tank with coke oven gas (COG).

The by-product gas reuse facility of the ophthalmic filter tank according to an embodiment of the present invention is a facility for reusing gas generated when the filter material is washed in the ordinal filter tank, and the ordinal filter tank in which the filter material for purifying the ordinal water is filled in the central area. Wow; A first supply line and a second supply line connected to the lower region of the ordinal filter tank; A nitrogen supply unit supplying nitrogen to the lower region of the ordinal water filter tank through the first supply line; A cleaning ordination supply unit for supplying ordination for cleaning to the lower region of the ordinal filter tank through the second supply line; A first discharge line connected to an upper region of said ordination filter tank; And a third supply line connected to the first discharge line and connected to a facility for reusing nitrogen exhausted from the ordinal filter tank.

A second discharge line connected to an upper region of said ordination filter tank; A waste tank connected to the second discharge line for collecting washing ordish water discharged from the ordinal filter tank; And an impurity separator installed in the first discharge line to separate impurities contained in nitrogen discharged from the ordinal filter tank and then supply the impurities to the second discharge line.

The impurity separation part is a housing that communicates up and down, the first discharge line is connected to the side wall of the impurity separation part, the third supply line is connected to the upper part of the impurity separation part, and the second is below the impurity separation part. And a third discharge line connected to the discharge line.

The third supply line is characterized in that the fourth discharge line for discharging nitrogen into the atmosphere is connected.

The method for reusing by-product gas of an ophthalmic filter tank according to an embodiment of the present invention is a method for reusing gas generated when cleaning filter material in an ordinal filter tank, and simultaneously supplying nitrogen and washing ordination water to the ordinal filter tank. Washing the filter material by passing the nitrogen and the washing ordination through the filter material; Discharging the nitrogen to clean the filter material from the ordinal filter tank; Separating impurities from nitrogen discharged from the ordination filter tank; Supplying the facility for reuse of the separated nitrogen with impurities.

Discharging ordination for cleaning the filter material from the ordinal filter tank; And discharging the impurities separated in the process of separating impurities from the nitrogen together with the washing ordinal water discharged from the ordination filter tank.

Separation of impurities from the nitrogen is characterized in that the tar and washing ordination contained in the nitrogen is separated by its own weight.

According to embodiments of the present invention, the filter material is cleaned using nitrogen during the cleaning operation of the ordinal filter tank, and the impurities contained in the nitrogen used for the cleaning operation of the filter material are separated, and then coke oven gas (COG; Coke) is used. Oven gas can be used to improve the efficiency of nitrogen use.

In addition, since the nitrogen used in the cleaning operation of the ordination filter tank is reused as coke oven gas instead of being exhausted into the atmosphere, the toxic substances that may be generated during the cleaning operation of the ordination filter tank are not exhausted into the atmosphere, resulting in air pollution. Can be prevented.

1 is a block diagram showing a conventional ordination filter tank installation,
2 is a block diagram showing an ordination filter tank installation according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Wherein like reference numerals refer to like elements throughout.

First, the present invention relates to an operation for cleaning filter material filled in an ordinal filter tank, wherein the ordinal filter tank purifies the ordination water used for cooling COG (Coke Oven Gas) during normal operation. Facility. In other words, the ordination filter tank performs the normal operation to purify the ordinal water continuously, and once a day about the back washer of the filter material, the present invention performs the back washer work of the filter material The invention relates to a plant and a method of using nitrogen in place of conventional air.

2 is a block diagram showing an ordination filter tank installation according to an embodiment of the present invention.

As shown in the drawing, the by-product gas reuse facility of the ophthalmic filter tank according to the present invention includes an ordinal filter tank 10 filled with a filter material 11 for purifying ordination.

The ordination filter tank 10 is a means for purifying the ordination proceeds, it is formed of a sealed enclosure. The interior of the ordination filter tank 10 is roughly divided into an upper region, a central region and a lower region. Thus, the filter material 11 for purifying ordination is filled in the central region. The filter material 11 is made of a material such as gravel and sand. At this time, the filter material 11 is disposed in the central region of the ordinal filter tank 10 by a blocking network 12, 13 such as a mesh network.

In addition, a first supply line 110 and a second supply line 31 for supplying nitrogen for cleaning the filter material 11 and cleansing water are connected to a lower region of the ordinal filter tank 10.

The first supply line 110 and the second supply line 31 are separately provided and connected to the lower region of the ordinal filter tank 10, respectively. It is preferable that at least one or more types of valves are provided in the first supply line 110 and the second supply line 31 to control the supply and supply of nitrogen and ordination water.

The first supply line 110 is connected to the nitrogen supply unit 100 for supplying nitrogen to the lower region of the ordinal filter tank 10 through the first supply line 110, the second supply line 31 To the lower region of the ordinal filter tank 10 through the second supply line 31 is connected to the cleaning ordination supply unit for supplying the cleaning ordination water.

In addition, a nitrogen exhaust line 120 may be branched to the first supply line 110 to adjust the nitrogen pressure of the ordinal water filter tank 10.

Meanwhile, a first discharge line 210 and a second discharge line 51 for discharging nitrogen supplied to the ordination filter tank 10 and the washing ordination water are connected to an upper region of the ordination filter tank 10.

The first discharge line 210 and the second discharge line 51 are provided separately and connected to the upper region of the ordinal filter tank 10, respectively. Various types of valves may be installed in the first discharge line 210 and the second discharge line 51 to control the discharge and discharge of nitrogen and ordination water.

A third supply line 220 is connected to the first discharge line 210 which is connected to the facility 200 for reusing nitrogen exhausted from the ordinal filter tank 10. At this time, the facility 200 for reusing nitrogen may be any kind of facility provided in the steel mill. For example, it may be reused in plants that dry cool the coke with nitrogen.

A fourth discharge line 410 may be branched and connected to the third supply line 220 to discharge nitrogen discharged from the ordination filter tank 10 to the atmosphere. At this time, the vent port 400 is connected to the fourth discharge line 410. Thus, by selectively controlling the valve provided in the fourth discharge line 410, nitrogen can be discharged into the atmosphere through the fourth discharge line 410 in a time of need.

A second discharge line 51 separate from the first discharge line 210 is connected to an upper region of the ordination filter tank 10. The second discharge line 51 is a means for discharging the cleansing water for cleaning the filter material 11 from the ordinal filter tank 10, the washing and water discharged from the ordinal filter tank 10 is collected It is connected to the waste tank (50).

In addition, the impurity contained in the nitrogen exhausted from the ordination filter tank 10 is separated between the first discharge line 210 and the third supply line 220 and then supplied to the second discharge line 51. Impurity separation unit 300 is installed.

The impurity separator 300 is a housing that communicates vertically and is a means for separating impurities contained in nitrogen by their own weight. Thus, the first discharge line 210 is connected to the side wall of the impurity separation unit 300, the third supply line 220 is connected to the upper portion of the impurity separation unit 300, the impurity separation unit The third discharge line 310 is connected to the lower portion of the 300. In this case, the third discharge line 310 is connected to the second discharge line 51.

On the other hand, the ordination filter tank 10 is provided with facilities for the purification of ordination during normal operation.

For example, the ordination supply pipe 71 is connected to the upper region of the ordinal filter tank 10, and the ordination supply pipe 71 is connected to an ordination supply unit 70 for supplying unpurified ordination. In addition, the central area of the ordinal filter tank 10 is connected to the ordination discharge pipe 81 through which filter material 11 is discharged and the purified ordination is discharged, and the ordination pipe is collected to the ordinal discharge pipe 81. Being ordination reservoir 80 is connected.

The use method of the by-product gas reuse facility of the ordination filter tank comprised as mentioned above is demonstrated.

First, the purifying operation of ordination, which is a normal operation of the ordinal filter tank, will be described.

The ordinal water that has not been purified by the ordination supply unit 70 is supplied to the ordination supply pipe 71, and the ordination is supplied to the upper region of the ordinal filter tank 10 through the ordination supply pipe 71. The ordinal water supplied to the upper region of the ordinal filter tank 10 is purified while passing through the filter material 11. At this time, impurities such as tar included in the ordination are attached to the filter material 11. The purified ordination is discharged to the ordination discharge pipe 81 is stored in the ordination reservoir (80).

The normal operation proceeds continuously, and a back washer for cleaning the filter material 11 of the ordinal filter tank 10 is performed once a day. The cleaning operation of the filter material 11 is performed by supplying cleaning ordination with nitrogen to form bubbles by using nitrogen in the cleaning ordination, and the cleaning ordination in which the bubble is formed passes through the filter material 11.

Next, the cleaning operation of the filter material 11 filled in the ordination filter tank 10 will be described.

First, the ordination supply pipe 71 connected to the ordination filter tank 10 is closed to block the supply of unclean water to the ordination filter tank 10. In addition, by closing the ore discharge pipe 81 connected to the ordination filter tank 10 to block the discharge of ordination from the ordination filter tank 10 to the ordination reservoir 80.

Then, nitrogen and washing ordination are simultaneously supplied to the lower region of the ordinal filter tank 10. At this time, nitrogen is supplied from the nitrogen supply unit 100 and supplied through the first supply line 110, and the cleaning ordination is supplied from the cleaning ordination supply unit 30 and supplied through the second supply line 31.

Thus, nitrogen supplied to the lower region of the ordinal filter tank 10 forms bubbles in the ordination for washing, and the ordination for forming the bubbles passes through the filter material 11. When the cleansing ordish water having the bubble passes through the filter material 11, impurities adhering to the filter material 11 are removed from the filter material 11 and the filter material 11 is washed. Impurities removed from the filter material 11 are floated to the upper region of the ophthalmic filter tank 10 together with the cleansing water.

While the cleaning of the filter material 11 is in progress, the ordinal filter tank 10 should be continuously supplied with nitrogen and washing ordination while the nitrogen and washing ordination should be discharged. The nitrogen is discharged through the first discharge line 210 connected to the upper region of the ordinal filter tank 10, and the discharge of the washing ordination containing impurities is performed through the second discharge line 51.

Thus, the nitrogen discharged through the first discharge line 210 is supplied to the facility 200 in which nitrogen is reused through the third supply line 220 connected to the first discharge line 210, and the second discharge line ( Cleaning ordinal water containing impurities discharged through 51 is collected and disposed of in the waste tank 50.

In this case, an impurity separator 300 is provided between the first discharge line 210 and the third supply line 220, so that when impurities are discharged together with the nitrogen through the first discharge line 210, nitrogen and impurities are discharged. Nitrogen is supplied to the facility 200 through which nitrogen is reused through the third supply line 220, and impurities are moved to the second supply line 31 through the third discharge line 310 to dispose of the waste tank. Collected in 50. At this time, impurities contained in nitrogen are heavier than nitrogen, such as tar and washing water.

Meanwhile, when nitrogen is supplied to another facility 200 through the third supply line 220 and the supply of nitrogen is to be stopped due to various factors, nitrogen may be discharged to the atmosphere through the fourth discharge line 410. .

As described above, the present invention can improve the use efficiency of nitrogen by using nitrogen for cleaning the filter material 11 and collecting the nitrogen after the cleaning operation and supplying it to another facility 200, as in the prior art. By reducing the exhaust gas into the atmosphere, it is possible to prevent air pollution.

Although the present invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the present invention is not limited thereto but is limited by the following claims. Accordingly, those skilled in the art will appreciate that various modifications and changes may be made thereto without departing from the spirit of the following claims.

10: ordination filter tank 11: filter material
100: nitrogen supply unit 110: first supply line
30: washing and water supply unit 31: second supply line
50: waste tank 51: second discharge line
200: nitrogen reuse facility 210: first discharge line
300: impurity separation unit 310: third discharge line

Claims (7)

As a facility for reusing the gas generated during the cleaning of the filter material in the ordinal filter tank,
An ordination filter tank filled with a filter material for purifying ordination in the central region;
A first supply line and a second supply line connected to the lower region of the ordinal filter tank;
A nitrogen supply unit supplying nitrogen to the lower region of the ordinal water filter tank through the first supply line;
A cleaning ordination supply unit for supplying ordination for cleaning to the lower region of the ordinal filter tank through the second supply line;
A first discharge line connected to an upper region of said ordination filter tank;
A by-product gas reuse facility of an ophthalmic filter tank comprising a third supply line connected to the first discharge line and connected to a facility for reusing nitrogen exhausted from the ordinal filter tank.
The method according to claim 1,
A second discharge line connected to an upper region of said ordination filter tank;
A waste tank connected to the second discharge line for collecting washing ordish water discharged from the ordinal filter tank;
A by-product gas reuse facility for an ordination filter tank including an impurity separation unit installed in the first discharge line to separate impurities contained in nitrogen discharged from the ordinal filter tank and then supply the impurities to the second discharge line.
The method according to claim 2,
The impurity separation part is a housing that communicates up and down, the first discharge line is connected to the side wall of the impurity separation part, the third supply line is connected to the upper part of the impurity separation part, and the second is below the impurity separation part. By-product gas reuse facility of the ordination filter tank is connected to the third discharge line connected to the discharge line.
The method according to claim 1,
The by-product gas reuse facility of the ordinal filter tank is connected to the third supply line is connected to the fourth discharge line for discharging nitrogen into the atmosphere.
A method for reusing gas generated upon cleaning of filter material in an ordinal filter tank,
Supplying nitrogen and washing ordination to the ordinal filter tank at the same time, and washing the filter material by passing the nitrogen and washing ordination through the filter material;
Discharging the nitrogen to clean the filter material from the ordinal filter tank;
Separating impurities from nitrogen discharged from the ordination filter tank;
A method for reusing by-product gas in an ordinal filter tank, comprising supplying nitrogen to a facility for reuse of impurity separated nitrogen.
The method according to claim 5,
Discharging ordination for cleaning the filter material from the ordinal filter tank;
A method for reusing by-product gas of an ophthalmic filter tank, the method comprising: discharging the impurities separated in the process of separating impurities from the nitrogen together with the washing ordinal water discharged from the ordinal filter tank.
The method according to claim 5,
The process of separating impurities from the nitrogen
A method for reusing by-product gas of an ordination filter tank for separating tar and washing ordination contained in nitrogen by its own weight.

Images