KR101204772B1 - Coal Type Cleaning Agent Of Sticked Naphthalene And Pitch In Facilities And Manufacturing Method Thereof - Google Patents

Abstract

The present invention relates to a naphthalene attached to the plant and a coal cleaner for removing the pitch and a method of manufacturing the same. More specifically, naphthalene and coal remover for removal of pitches attached to a facility comprising 60 to 80% by volume of distilled liquor obtained from coal-based coal tar and 20 to 40% by volume of N-methyl 2-pyrrolidone. And to a method for producing the same. Since the present invention described above uses a detergent obtained from coal-based coal tar, it is inexpensive and is an oily component such as naphthalene and pitch, so that the naphthalene and pitch can be easily removed. In addition, the crack tar is cracked by high temperature nickel gamma alumina catalyst treatment rather than simply distilled to increase the distillation stock solution, which increases the use time and processing efficiency while maintaining stability and minimizing the influence of other equipment. It works.

Coal tar, nickel gamma alumina catalyst, cracking, distilled liquor, N-methyl 2-pyrrolidone

Description

Coal cleaner for naphthalene and pitch removal attached to equipment and its manufacturing method {Coal Type Cleaning Agent Of Sticked Naphthalene And Pitch In Facilities And Manufacturing Method Thereof}

The present invention relates to a naphthalene and a coal-based cleaning agent for removing pitch and a method for manufacturing the same, and more particularly, to crack the unsaturated component of coal-based coal tar with a low molecular weight using a nickel gamma alumina catalyst, The gas obtained from the gas purification plant as a cleaning agent containing 60 to 80% by volume of distilled stock solution and 20 to 40% by volume of N-methyl 2-pyrrolidone obtained by first distilling the resultant obtained by cracking the unsaturated component at 270-290 ° C. The present invention relates to naphthalene attached to facilities such as pipes and trays through which the product passes, and naphthalene attached to a facility for removing pitch, and a coal cleaner for removing pitch, and a method of manufacturing the same.

Generally, ordination, coke oven gas (hereinafter referred to as COG), and coal-based coal tar are generated in the dry distillation process in which coke is prepared by mixing various types of coal in the steelmaking process. In the ordination, 5 ~ 10% of water contained in coal is evaporated and reacts with nitrogen in the air to generate ammonia water, and coke oven gas is benzene, toluene, and xylene (hereinafter referred to as BTX). Light-Oil (Volatile Organic Compounds), which are volatile components, are contained in the gas in a vapor state and then recovered in the liquid state in the diesel recovery process. In addition, coal-based coal tar is generated in a liquid state.

Among them, coke oven gas and coal-based coal tar contain some naphthalene. The naphthalene is contained in the gas in the form of steam and attached to the pipes and trays of the gas purification equipment through which the gas passes. Do not operate the function normally. In addition, coal-based coal tar contains pitch, which is attached to facilities such as pipes and trays of gas purification facilities through which gas passes, thereby preventing the functioning of facilities such as facilities and pipes closing. Therefore, in order to solve such a problem, a cleaning operation is performed. In general, the cleaning operation uses steam and an alkaline cleaner, but the cleaning time is long, the cost is excessive, and there is a problem of serious contamination after cleaning.

In order to solve this problem, the present invention cracks the unsaturated component of coal-based coal tar with low molecular weight using a nickel gamma alumina catalyst, and the resultant obtained by cracking the unsaturated component of the coal-based coal tar at 270 to 290 ° C. Naphthalene and pitch attached to equipment such as pipes and trays through which gas of gas purification equipment passes through, including 60 to 80% by volume of distilled liquor obtained by distillation and 20 to 40% by volume of N-methyl 2-pyrrolidone. An object of the present invention is to provide a naphthalene and a coal-based cleaning agent for removing pitches and a method of manufacturing the same.

The present invention to solve the above object

60 to 80% by volume of distilled liquor obtained from coal coal tar and

Provided is a naphthalene and a coal-based cleaner for removing pitches, comprising 20-40% by volume of N-methyl 2-pyrrolidone.

In addition,

Cracking coal-based coal tar using a nickel gamma alumina catalyst;

Distilling the resultant obtained by cracking the coal-based coal tar to obtain a distillation stock solution by removing light oil and pitch components; And

It provides a method for producing a naphthalene and a coal-based cleaner for removing the pitch attached to the facility comprising a; distilled stock solution and N-methyl 2-pyrrolidone.

The naphthalene and pitch removing coal-based cleaner and its manufacturing method attached to the equipment of the present invention are inexpensive and oil-based components such as naphthalene and pitch since the cleaner obtained from coal-based coal tar is easy to remove the naphthalene and pitch. There is this. In addition, the crack tar is cracked by high temperature nickel gamma alumina catalyst treatment rather than simply distillation, so that the distillation stock solution can be increased, and it is also very effective in removing naphthalene and pitch deposits in the process equipment and maintaining stability. And it minimizes the influence of other facilities and has the effect of increasing the use time and processing efficiency.

In one embodiment of the present invention

60 to 80% by volume of distilled liquor obtained from coal coal tar and

Provided is a naphthalene and a coal-based cleaner for removing pitches, comprising 20-40% by volume of N-methyl 2-pyrrolidone.

The naphthalene and pitch removal coal-based cleaning agent attached to the facility uses a detergent obtained from coal-based coal tar, and is inexpensive and is an oily component such as naphthalene and pitch, so that the naphthalene and pitch can be easily removed. In addition, the crack tar is cracked by high temperature nickel gamma alumina catalyst treatment rather than simply distillation, so that the distillation stock solution can be increased, and it is also very effective in removing naphthalene and pitch deposits in the process equipment and maintaining stability. And it minimizes the influence of other facilities and has the effect of increasing the use time and processing efficiency.

At this time, the distillate stock solution is characterized in that obtained by distilling the resultant obtained by cracking the coal-based coal tar.

In addition, the cracking treatment is characterized in that it is carried out using a nickel gamma alumina catalyst.

Here, the coal-based coal tar cracking treatment using the nickel gamma alumina catalyst is preferably carried out in a catalytic reactor that is non-oxidative and maintains a temperature of 230 ~ 250 ℃.

First, coal-based coal tar is passed through a reactor with the nickel gamma alumina catalyst, which is a nickel deposited gamma alumina catalyst. The process is to crack the unsaturated components in the coal tar in the catalytic reactor to decompose the tar of the polymer into a low molecular material. Unsaturated components in the coal tar include high boiling point acenaphthene, dibenzofuran, anthracene, and the like.

In this case, the catalytic reactor maintains non-oxidation property so that the low molecular weight material is not oxidized or aged.

In addition, it is preferable that the temperature of the catalytic reactor is 230 to 250 ° C. because a high yield of production and a low molecular weight material which is a result of cracking do not deteriorate. When the temperature of the catalytic reactor is higher or lower than the temperature range, the production yield tends to decrease.

Here, the coal tar is a cracking process difference occurs depending on the amount of catalyst, preferably 50 cm per minute coal, a residence time is injected based on 1 hour. The injection amount of the coal tar is a condition that can be rapidly processed in large quantities at a temperature of 230 ~ 250 ℃ of the catalytic reactor.

In addition, the distillation stock solution of the coal-based detergent is first distilled from the result obtained by cracking the unsaturated components of the coal-based coal tar at 270 ~ 290 ℃ by cold collecting the diesel distillate containing benzene, toluene or xylene and removed It is obtained by further separating and removing the pitch component which is a residue.

At this time, the cracked coal tar, which is a low molecular material in the catalytic reactor, is first distilled in a distillation column. During the first distillation, the diesel diesel distillate containing benzene, toluene or xylene is cooled and collected at a high distillation temperature of 270 to 290 ° C., and the remaining pitch component is further removed and removed. Distilled distillate of naphthalene and pitch removal coal-based detergent for removing naphthol and pitch removed from the cracked coal tar by cold collecting and removing the diesel distillate containing benzene, toluene or xylene, further separating and removing the remaining pitch components. to be. The distillate stock solution of the naphthalene and pitch removal coal-based cleaners attached to the facility is obtained in a dry distillation process for carbonizing coal to produce coke, which is inexpensive and has an excellent yield.

60 to 80% by volume of the distilled liquor and 20 to 40% by volume of N-methyl 2-pyrrolidone constitute naphthalene and a coal-removing detergent for removing pitch.

N-methyl 2-pyrrolidone is added to the distilled liquor to prepare naphthalene and a coal-based cleaner for removing pitches as follows.

The N-methyl 2-pyrrolidone has an excellent effect of dissolving volatile solid components present in the distillate, that is, components such as naphthalene, 2-methylnaphthalene, indole, biphenyl, acenaphthene, and prolene, and thus the effect of the cleaning agent. Doubles. Therefore, the N-methyl 2-pyrrolidone performs an excellent role as a cleaning agent to remove naphthalene and pitch attached to equipment such as pipes and trays through which the gas of the gas purification equipment passes.

In addition, the content of the distilled liquor is 60-80% by volume of N- methyl 2 to capture or absorb the naphthalene and pitch attached to the equipment such as pipes and trays through which the gas of the gas purification equipment passes, and used as a solubility enhancer. It is preferable because it contains an appropriate amount of pyrrolidone and thus plays an excellent role of the cleaning agent. If the content of the distillate stock is less than 60% by volume, there is a problem that it is difficult to capture or absorb naphthalene and pitch affecting the closing of pipes and trays. In addition, when the content of the distillation stock solution exceeds 80% by volume, it is difficult to sufficiently include N-methyl 2-pyrrolidone used as a solubility enhancer.

Here, when the content of the N- methyl 2-pyrrolidone is 20 to 40% by volume, it is preferable as a component amount of the cleaning agent because it plays the role of a solubility enhancer to the maximum. When the content of the N-methyl 2-pyrrolidone is less than 20% by volume, volatile solids present in the distillate solution, that is, components such as naphthalene, 2-methylnaphthalene, indole, biphenyl, acenaphthene, and prolene are dissolved. The performance to make it falls. In this case, when the content of the N-methyl 2-pyrrolidone exceeds 40% by volume, it is difficult to sufficiently include the distilled liquor, and thus there is a problem in that the washing ability is poor.

In addition, in another embodiment of the present invention

Cracking coal-based coal tar using a nickel gamma alumina catalyst;

Distilling the resultant obtained by cracking the coal-based coal tar to obtain a distillation stock solution by removing light oil and pitch components; And

It provides a method for producing a naphthalene and a coal-based cleaner for removing the pitch attached to the facility comprising a; distilled stock solution and N-methyl 2-pyrrolidone.

At this time, the cracking step is characterized in that the progress in the catalytic reactor to maintain a non-oxidizing atmosphere and the temperature of 230 ~ 250 ℃.

In addition, the distillation in the step of obtaining the distillation stock solution is characterized in that proceeds at a temperature of 270 ~ 290 ℃.

In addition, the step of mixing the distillation stock solution and the N-methyl 2-pyrrolidone is characterized in that it comprises 60 to 80% by volume of the distillation stock solution and 20 to 40% by volume of the N-methyl 2-pyrrolidone. .

Naphthalene and pitch removal coal-based cleaner manufacturing method attached to the facility is as shown in Figure 1, coal-based coal tar is cracked by using a nickel gamma alumina catalyst in a catalytic reactor in a non-oxidizing atmosphere and maintaining a temperature of 230 ~ 250 ℃ After distilling the components, the resultant was first distilled at 270 to 290 ° C., and diesel light distillate containing benzene, toluene, or xylene was collected by cooling, and then the remaining pitch was further removed and removed. Obtaining 80% by volume, and mixing 20-40% by volume of N-methyl 2-pyrrolidone to prepare a coal-based cleaner.

Here, the description of the cracking treatment, the first distillation, the distillation stock solution and the N-methyl 2-pyrrolidone uses the preceding description.

Hereinafter, the present invention will be described in detail by specific examples.

However, the following examples are illustrative of the present invention, and the contents of the present invention are not limited by the following examples.

Example 1

Example 1 is to confirm the temperature conditions of the nickel gamma alumina catalytic reactor. Set the temperature of the catalytic reactor to 210, 220, 230, 240, 250, 260 ° C and inject coultar with a residence time of 1 hour at 50 cm per minute to crack the coultar and treat the coultar at 1 at 280 ° C. The amount of distilled liquor produced by distillation was measured. The results are shown in Fig.

In Figure 2, when the production yield (volume ratio of the distillate solution produced relative to the coultar used) using a nickel gamma alumina catalyst at a high temperature of 200 ℃ or more as a reference to 100% compared to the production yield at each temperature Indicated. As shown in FIG. 2, the production yield was less than 35% when the temperature of the catalytic reactor was less than 220 ° C., and the production yield was significantly increased at a temperature between 230 ° C. and 250 ° C. FIG. In addition, at 260 ° C., the effect of increasing was insignificant despite the high temperature. Therefore, in the present invention, it is preferable to operate the catalytic reactor at a temperature between 230 ° C and 250 ° C.

Example 2

Example 2 is for determining the amount of N-methyl 2-pyrrolidone to be mixed into the dissolution enhancer of the detergent.

N-methyl 2-pyrrolidone was added to the distilled liquor with 10% by volume, 20% by volume, 30% by volume, 40% by volume and 50% by volume, respectively, and N-methyl 2-pyrrolidone was added to the distillate. The removal effect was measured by spraying the cleaning agent not added to the naphthalene and the equipment with the pitch under the same conditions.

Here, the equipment in which naphthalene and pitch were attached was used in which the naphthalene and pitch of the same parts were kept under the same conditions. The test time was 5 hours and sprayed under the same conditions to remove the amount of naphthalene and pitch removed from the parts. The ratio of the amount removed from the adhesion amount is shown in FIG. 3 in terms of removal rate.

As shown in FIG. 3, when only N-methyl2-pyrrolidone was added and the distilled liquor was used, the removal rate was 70% or less, and when N-methyl 2-pyrrolidone was added to the distilled liquor at 20% by volume, The removal rate was the highest when the removal rate was 89%, 40% by volume of N-methyl 2-pyrrolidone was added at 93%, and the addition amount was increased by more than 40% by volume of N-methyl 2-pyrrolidone. Even if the removal rate was increased the effect was insignificant. In particular, since N-methyl 2-pyrrolidone was added at least 50% by volume, the effect was not increased.

In addition, these results show that when N-methyl 2-pyrrolidone is added in less than 20% by volume, the ability to dissolve the solid components is insignificant, and when added in excess of 40% by volume, the effect of increasing performance is insignificant. Therefore, the amount of N-methyl 2-pyrrolidone added in the present invention is preferably adjusted to 20 to 40% by volume.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

1 is a flowchart of a manufacturing method of a detergent of the present invention.

Figure 2 is a graph showing the production yield for confirming the temperature conditions of the nickel gamma alumina catalytic reactor according to an embodiment of the present invention.

Figure 3 is a graph showing the naphthalene and pitch removal rate for determining the amount of N- methyl 2-pyrrolidone added to the cleaning agent according to an embodiment of the present invention.

Claims (7)

delete delete delete Cracking coal-based coal tar using a nickel gamma alumina catalyst; Distilling the resultant obtained by cracking the coal-based coal tar to obtain a distillation stock solution by removing light oil and pitch components; And Mixing the distilled liquor 60 to 80% by volume and 20 to 40% by volume of N-methyl 2-pyrrolidone; Naphthalene and the coal cleaning agent for removing the pitch attached to the installation comprising a. 5. The method of claim 4, wherein the cracking step is performed in a catalytic reactor maintaining a non-oxidizing atmosphere and a temperature of 230 to 250 ° C. 6. The method of claim 4, wherein the distillation in the step of obtaining the distillate stock solution naphthalene and coal removal method for removing the coal attached to the equipment, characterized in that proceeding at a temperature of 270 ~ 290 ℃. delete

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