WO2015009118A1

WO2015009118A1 - Distillation apparatus

Info

Publication number: WO2015009118A1
Application number: PCT/KR2014/006575
Authority: WO
Inventors: 이성규; 신준호; 김성균; 이종구
Original assignee: 주식회사 엘지화학
Priority date: 2013-07-18
Filing date: 2014-07-18
Publication date: 2015-01-22

Abstract

The present application relates to a distillation apparatus and a distillation method, a distillation apparatus and a distillation method according to the present application blocking the channeling phenomenon arising when compounds are being separated, thereby raising the separation effectiveness and contributing to a reduction in energy consumption.

Description

Distillation apparatus

The present application relates to a distillation apparatus of a mixture.

Various raw materials, such as crude oil, etc., are a mixture of various substances, for example various compounds, which raw materials can typically be used after being separated into the respective compounds. A typical chemical process for separating the mixture is a distillation process.

For example, the mixture may be distilled through one or more distillation towers, in which part or all of the flow may pass through a condenser or reboiler and then refluxed to the distillation tower, through which the compounds of high purity Can be obtained. In a conventional distillation column, the raw material or reflux stream is generally introduced in one direction, or the product stream is also usually discharged in only one direction. However, when the raw material flowing into the distillation column is supplied only in one direction, the liquid falling into the lower region of the stage into which the raw material is introduced does not fall evenly, which may cause channeling, and also flow out of the distillation column. The same is true when the flow is refluxed in one direction. In this case, unnecessary energy may be consumed to maintain the concentration of each flow.

The present application is to provide a distillation apparatus and a distillation method using the same that can prevent the occurrence of the drift phenomenon.

The present application relates to a distillation apparatus. The exemplary distillation apparatus may be formed of two or more openings in which one or more of the inlets of the distillation apparatus are located spaced apart from each other. Accordingly, the energy loss can be minimized and the economics of the process can be improved by blocking the channeling generated during the purification of the raw materials. In the present specification, the "drift phenomenon" refers to a phenomenon in which contact between a vapor and a liquid mixture does not occur smoothly in a distillation column, or in the case of a dividing wall distillation column, a fluid tending to flow toward a specific part of a wall surface, and a flow phenomenon. Silver significantly reduces the separation efficiency of raw materials and causes additional energy consumption.

Hereinafter, the distillation apparatus of the present application will be described with reference to the drawings, but the drawings are illustrative and the scope of the distillation apparatus is not limited to the drawings.

1 exemplarily shows a distillation apparatus according to an embodiment of the present application.

As shown in FIG. 1, the distillation apparatus may include a distillation tower 100 having a condenser 101 and a reboiler 102. The distillation column is a device that can separate the multi-component material contained in the raw material (F ₁ ) by the difference in boiling point, taking into consideration the boiling point, such as the components of the raw material (F ₁ ) or the component to be separated, Distillation apparatus having various forms can be used in the present application. For example, in the distillation apparatus of the present application, a raw material including a mixture of three components of low boiling point, middle boiling point, and high boiling point material can be separated by introducing into the distillation column 100. The specific kind of distillation apparatus that can be used in the distillation process of the mixture in the present application is not particularly limited, and, for example, a distillation apparatus including a distillation column 100 having a general structure as shown in FIG. 1 may be used.

As shown in FIG. 1, an exemplary distillation apparatus of the present application includes a distillation column 100 equipped with a condenser 101 and a reboiler 102. In addition, the inside of the distillation column 100 may be divided into an upper end 110, a lower end 130, and an intermediate end 120, or may be divided into an upper part 110, a lower part 130, and an intermediate part 120. As used herein, the term "top" or "top" means a relatively upper portion of the structure of the distillation column 100. For example, when the distillation column is divided into two equal parts in the height or length direction of the distillation column 100, Can mean the upper part of the two regions. In addition, "lower" or "lower" in the above means a relatively lower portion in the structure of the distillation column 100, for example, when the distillation column 100 is divided into two in the height or length direction of the distillation column. It may mean the lower part of the two divided areas. In addition, in the present specification, "middle end" or "middle part" may mean a middle region among three regions divided when the distillation column 100 is divided into three equal parts in the height or length direction of the distillation column, and the distillation column 100 It may mean an area between the top and bottom of the). In the present specification, the upper, lower and middle portions of the distillation column 100 may be used as a concept relative to each other.

In addition, as used herein, the term "condenser" is a device installed separately from the distillation column, and may refer to a device for cooling the material flowing out of the main body in such a manner as to contact with the cooling water introduced from the outside. For example, the condenser 101 of the distillation apparatus may be a device for condensing the upper product outlet stream F ₂ flowing out of the upper outlet 111 of the distillation column 100. In addition, the term "reboiler" is a heating device installed on the outside of the distillation column, it may mean a device for heating and evaporating again the high boiling point flow. For example, the reboiler 102 of the distillation apparatus may be a device for heating the bottom product effluent stream (F ₃ ) flowing out of the bottom outlet 131 of the distillation column (100).

In one example, the distillation column 100 is a raw material inlet 121 to which the raw material F ₁ is supplied, an upper outlet 111 through which a low boiling point flows from the upper portion 110 of the distillation column, and an upper portion of the distillation column ( The upper reflux inlet 112, the reflux flow of the flow flowing out of 110, the lower outlet portion 131, the high outlet flow flows out of the lower portion 130 of the distillation column, the flow flowing out of the lower portion 130 of the distillation column It includes a lower reflux inlet 132 is introduced into the reflux flow. For example, when the raw material F ₁ is introduced into the raw material inlet 121 located at the middle end of the distillation column 100, the introduced raw material F ₁ is the upper or upper portion 110 of the distillation column 100. The upper product outlet flow (F ₂ ) flowing out from the upper outlet 111 is located in the bottom) and the lower product outlet flow outflow from the lower outlet (131) located at the bottom or bottom 130 of the distillation column (100) F ₃ ) can be separated and spilled separately. The upper product outlet stream F ₂ flowing out of the upper outlet 111 passes through a condenser 101, and some or all of the upper product outlet stream F ₂ passing through the condenser 101 is Inflow to the upper reflux inlet 112 may be refluxed to the distillation column 100, or may be stored as a product. In addition, the bottom product effluent stream F ₃ flowing out of the bottom outlet 131 of the distillation column 100 passes through the reboiler 102 and passes the bottom product effluent stream (passed through the reboiler 102). Some or all of F ₃ ) may flow into the lower reflux inlet 132 and be refluxed to the distillation column 100 or may be stored as a product.

As used herein, the term "low boiling point flow" refers to a stream in which a relatively low boiling point component is rich among raw material streams including three components of low boiling point, middle boiling point, and high boiling point component, and the low boiling point flow is, for example, Means a flow out of the upper outlet 111 of the distillation column (100). The term “high boiling point flow” refers to a stream in which a relatively high boiling point component is rich among raw material streams including three components of low boiling point, middle boiling point, and high boiling point component, and the high boiling point flow is, for example, A relatively high boiling point component flowing out of the bottom outlet 131 of the distillation column 100 means a rich flow. As used herein, the term "rich flow" refers to a low boiling point component included in the stream flowing out of the upper outlet 111 of the distillation column 100 than the content of the low boiling point component and the high boiling point component included in the raw material F ₁ , It means a higher flow of each of the high boiling point components included in the flow flowing out of the lower outlet 131. For example, the content of each of the low boiling point component included in the upper outlet stream F ₂ and the high boiling point component included in the lower outlet stream F ₃ of the distillation column 100 is 50% by weight or more and 80% by weight. At least 90 wt%, at least 95 wt%, or at least 99 wt%. In the present specification, the low boiling point stream and the upper effluent stream F ₂ of the distillation column 100 may be used in the same sense, and the high boiling point stream and the lower effluent stream F ₃ of the distillation column 100 may be used in the same sense. have.

The theoretical number of stages of the distillation column 100 may be 30 to 80 stages, 40 to 70 stages, 25 to 50 stages or 45 to 60 stages, but this may be controlled in various ranges according to components to be separated, but is not limited thereto. . In addition, in this case, the raw material inlet 121 of the distillation column 100 is the middle region or middle stage 120 of the distillation column 100, for example, 5 to 30 stages, 5 to 5 of the distillation column 100. It may be located in 25 stages, 5 to 15 stages or 10 to 20 stages, which is a relative position based on the theoretical stage of the distillation column, and may vary depending on the theoretical stage of the distillation column. In the above description, "theoretical stage number" is the number of virtual regions or stages in which two phases such as gaseous phase and liquid phase are in equilibrium with each other in a separation process using a distillation apparatus including the distillation column 100 and the second distillation column 200. Means.

In one example, the upper outlet 111 and the upper reflux inlet 112 of the distillation column 100 may be located in the upper portion 110 of the distillation column, the upper outlet 111 is preferably May be located at the top of the distillation column 100. In addition, the lower outlet 131 and the lower reflux inlet 132 of the distillation column 100 may be located at the lower 130 of the distillation column, and the lower outlet 131 is preferably the distillation column It may be located at the bottom of the (100). In the above description, "top" means the top of the distillation column, and may be located at the top of the above-described distillation column, and "top" means the bottom of the distillation column, and may be located at the bottom of the distillation column. . For example, the upper outlet 111 of the distillation column 100 may be located at the top of the distillation column 100, the upper reflux inlet 112 of the distillation column 100 is the top of the distillation column 100, For example, it may be located at one end of the distillation column 100. In addition, the lower outlet portion 131 of the distillation column 100 may be located at the bottom of the column 100, the lower reflux inlet 132 of the distillation column 100 is located at the bottom of the distillation column 100 For example, the distillation column 100 may be located at 80, 70, or 60 stages.

In one example, in order to perform a separation process from the raw material (F ₁ ) comprising three components of low boiling point, middle boiling point and high boiling point, the raw material (F ₁ ) is a raw material inlet of the distillation column 100 as shown in FIG. It may be introduced into (121). When the raw material F ₁ is introduced into the distillation column 100, the low boiling point stream having a relatively low boiling point among the components included in the raw material F ₁ flows out of the upper outlet 111 and has a relatively high boiling point. The branch boiling point flow and the high boiling point flow may flow out of the first bottom outlet 131. In one example, when the raw material F ₁ including the low boiling point component, the middle boiling point component and the high boiling point component is introduced into the raw material inlet 121 of the distillation column 100, the upper outlet portion of the distillation column 100 ( In 111, a low boiling point component of the raw material F ₁ flows out into the upper product effluent stream F ₂ , and the discharged upper product effluent stream F ₂ passes through a condenser 101 and a part of the distillation tower ( Reflux to the top reflux inlet 112 of 100 and the remaining portion can be stored as a product. Meanwhile, in the lower outlet part 131 of the distillation column 100, the middle boiling point component and the high boiling point component among the components of the raw material F ₁ flow out into the lower product outflow stream F ₃ , and the outflowing lower product outlet flows out. The flow F ₃ is passed through the reboiler 102, a part of which is refluxed to the bottom reflux inlet 132 of the distillation column 100, and the other part may be produced as a product.

In one embodiment, one or more of the raw material inlet 121, the upper reflux inlet 112 and the lower reflux inlet 132 of the distillation column 100 may be formed of two or more openings spaced apart from each other. . Accordingly, by blocking the drift phenomenon occurring in the purification process of the raw material (F ₁ ) it is possible to minimize the energy loss and improve the economics of the process.

In one example, in order to prevent the drift phenomenon, the two or more openings may be positioned to allow the flow into or out of the distillation column 100 to flow in or out of two or more directions.

In one embodiment, the distillation column 100 may include two or more small areas that divide the horizontal cross-sectional area evenly. 2 is a cross-sectional view parallel to the ground of an exemplary distillation column 100. As shown in FIG. 2, the distillation column 100 is an arbitrary small area that divides the horizontal cross-sectional area of the distillation column 100 into an equal area, for example, a plurality of small areas A _1-1 , A _1-2 , A _1-3 , A _1-4 ).

In one example, one or more of the raw material inlet 121, the upper reflux inlet 112 and the lower reflux inlet 132 of the distillation column 100 may be formed of two or more openings spaced apart from each other. The two or more openings may be located in two or more small regions that divide the horizontal cross-sectional area of the distillation column 100 evenly. In the above description, the two or more openings may be “each located” may mean that one opening is located in one area in an area divided evenly by the number of the openings. 3 is a diagram illustrating a cross section parallel to the ground of the distillation column 100 according to the present application, in which two openings are formed. For example, as shown in FIG. 3, the cross section of the distillation column 100 may be divided into two equal subregions A _1-1 and A _1-2 . When one or more of the raw material inlet 121, the upper reflux inlet 112 and the lower reflux inlet 132 of 100 is formed of two openings spaced apart from each other, one of the two openings The opening is located in one small region A _1-1 of the two divided regions, and the other one opening is the other small region A _1-2 adjacent to the region where the one opening is located. By being located at, one opening may be located in each area.

In the case of the distillation column in which the raw material inlet 121, the upper reflux inlet 112, and the lower reflux inlet 132 are formed as one opening, the raw material or the reflux flow is supplied only in one direction. Drift may occur. However, when at least one of the raw material inlet 121, the upper reflux inlet 112 and the lower reflux inlet 132 of the distillation column 100 is formed of two or more openings, the raw material F ₁ , reflux The flow is evenly introduced in two or more directions to prevent the above drift from occurring.

In the distillation column 100 according to the present application, the drift phenomenon can be effectively suppressed by adjusting the position of each opening, the flow rate and the direction of the flow into or out of each opening according to the number of two or more openings.

In one example, the distillation column 100, in which at least one of the raw material inlet 121, the upper reflux inlet 112 and the lower reflux inlet 132 is formed by two or more openings, may satisfy the following general formula (1). Can be. When using the distillation column 100 including two or more inlet portions satisfying the general formula 1, it is possible to minimize the occurrence of the drift phenomenon, thereby reducing the energy consumption, separating the raw material 110 with high efficiency can do

[Formula 1]

-5 ° ≤ ΔD ≤5 °

In Formula 1, ΔD is an extension line extending from one of the two or more openings to the center of the distillation column 100 and one or two openings adjacent to the one opening, the distillation column 100 It represents the difference between the two angles formed by the extension line extending to the center of.

For example, when one or more of the raw material inlet 121, the upper reflux inlet 112 and the lower reflux inlet 132 of the distillation column 100 is formed of two openings spaced apart from each other, the above-described As described above, the two openings may be located in two small regions A _1-1 and A _1-2 , which are equally divided in cross section parallel to the ground of the distillation column 100. Specifically, as shown in FIG. 4, the two openings may be installed opposite to each other based on the cross-sectional center point, and the raw materials F ₁ may be introduced into the two raw material inlets 121, respectively. The drift phenomenon generated when the raw material F ₁ is introduced can be efficiently suppressed. In one example, when one or more of the raw material inlet 121, the upper reflux inlet 112 and the lower reflux inlet 132 is formed as two openings spaced apart from each other, as shown in FIG. An extension line L ₁ extending from one of the two openings to the center of the distillation column and an extension line L ₂ extending from the other opening to the center of the distillation column form two angles θ ₁ and θ ₂ . In addition, ΔD (θ ₁ -θ ₂ ), which is a difference between the two angles, may satisfy -5 ° to 5 °. In this case, the extension line (L ₁₎ an extension (L ₂₎ and the angle extending in the center of a distillation tower from the remaining one opening extending from one of the opening of the two openings to the center of the column also has the 4 Similarly, for example, 175 ° to 185 °, 177 ° to 183 °, or 179 ° to 181 °, and by adjusting the angle in the above range, it is possible to minimize the occurrence of the drift phenomenon. In one example, when the two openings are completely symmetric to each other, that is, an extension line L ₁ extending from one of the two openings to the center of the distillation column and extending from the other opening to the center of the distillation column When the extension line L ₂ is positioned on the same straight line, ΔD (θ ₁ -θ ₂ ) may be 0 °.

As shown in FIG. 5, one or more of the raw material inlet 121, the upper reflux inlet 112, and the lower reflux inlet 132 of the distillation column 100 may be formed of three openings spaced apart from each other. The three openings may be located in three small regions A _1-1 , A _1-2 , and A _1-3 that evenly divide a cross section parallel to the ground of the distillation column 100. Specifically, as shown in FIG. 6, the three openings may be installed to be equally spaced from each other, and may be positioned to allow the flow of fluid to flow in or out of the three openings, respectively. In one example, when one or more of the raw material inlet 121, the upper reflux inlet 112 and the lower reflux inlet 132 is formed of three openings spaced apart from each other, of the three openings An extension line L ₁ extending from one opening to the center of the distillation column and an extension line L ₂ and L ₃ respectively extending from the remaining two openings to the center of the distillation column form two angles θ ₁ and θ ₂ . ΔD (θ ₁ -θ ₂ ), the difference between the two angles, may satisfy -5 ° to 5 °. In this case, the angle formed by the extension lines L ₁ extending from one of the three openings to the center of the distillation column and the extension lines L ₂ and L ₃ extending from the remaining two openings to the center of the distillation column, As shown in Figure 6, for example, may be 115 ° to 125 °, 117 ° to 123 °, or 119 ° to 121 °, by adjusting the angle in the above range, it is possible to minimize the occurrence of the drift phenomenon. In one example, when the three openings are equally spaced from each other on the outer circumferential surface of the distillation column, that is, from an extension line L ₁ extending from one of the openings to the center of the distillation column and the other two openings When the angle formed by the extension lines L ₂ and L ₃ extending to the center of the distillation column is 120 °, ΔD (θ ₁ -θ ₂ ) may be 0 °.

As shown in FIG. 7, one or more of the raw material inlet 121, the upper reflux inlet 112, and the lower reflux inlet 132 of the distillation column 100 may be formed of four openings spaced apart from each other. The four openings may be located in four small regions A _1-1 , A _1-2 , A _1-3 , and A _1-4 , which are divided evenly in a section parallel to the ground of the distillation column 100. Can be. Specifically, as shown in FIG. 8, the four openings may be installed to be equally spaced from each other, and may be positioned to allow the flow of fluid to flow into or out of the four openings, respectively. In one example, when one or more of the raw material inlet 121, the upper reflux inlet 112 and the lower reflux inlet 132 is formed of four openings spaced apart from each other, of the four openings Extension lines L ₁ extending from one opening to the center of the distillation column and extension lines L ₂ and L ₃ extending from the two openings adjacent to the opening to the center of the distillation column, respectively, have two angles θ ₁ , θ ₂ ), and ΔD (θ ₁ −θ ₂ ), which is a difference between the two angles, may satisfy −5 ° to 5 °. In this case, the extension lines L ₁ extending from one of the four openings to the center of the distillation column extend from the two openings adjacent to the one opening to the center of the distillation column (L ₂ , L _3). 7) may be, for example, 85 ° to 95 °, 87 ° to 93 °, or 89 ° to 91 °, and by adjusting the angle in the above range, the occurrence of a drift phenomenon may be observed. It can be minimized. In one example, the four cases that the opening is positioned from one another at equal intervals on the outer peripheral surface of the column, that is, the four opening any one of the extension line (L ₁₎ and the opening of the one that extends to the center of the distillation column from the opening of When the angle formed by the extension lines L ₂ and L ₃ extending from two adjacent openings to the center of the distillation column is 90 °, ΔD (θ ₁ -θ ₂ ) may be 0 °.

As such, when the flow of the fluid flowing into or out of the distillation column 100 is supplied or discharged in two or more directions, the raw material inlet 121, the upper reflux inlet 112, and the lower reflux inlet of the distillation column 100. Since the flow of the liquid falling to the lower region of the stage where 132 is located can be maintained evenly, the purification efficiency can be improved. That is, when the raw material inlet 121, the upper reflux inlet 112 and the lower reflux inlet 132 formed of two or more openings of the distillation column 100 satisfy the above conditions, each flow is It is possible to effectively block the drift caused by the inflow, it is possible to separate the raw material (F _1-1 ) with high efficiency due to the excellent design and operation ease of the distillation apparatus.

4, 6, and 8, in the distillation column 100 of the present application, all the inflow velocity vector components projected on the cross section parallel to the ground of the distillation column 100 may be directed toward the center point of the cross section. Specifically, the magnitude of the flow rate and the inflow rate flowing through the two or more openings are equal to each other, and the sum of the product of the flow rate F of the fluid flow and the inflow velocity vector component projected on the cross section is 0 (zero). Can be. As described above, when the sum of the product of the flow rate of the fluid flow through the two or more openings and the inflow velocity vector component projected on the cross section cancels each other to zero (zero), the drift caused by the two or more fluid flows can be effectively blocked. The term "flow rate (F)" means the flow rate (volume per unit time) flowing through each inlet, the "inflow velocity vector component" is parallel to the ground inlet velocity (distance per unit time) vector through each inlet It means a vector component projected on the cross section of the distillation column.

In one example, one or more of the raw material inlet 121, the upper reflux inlet 112 and the lower reflux inlet 132 is formed by two openings spaced apart from each other 100 is a general formula 2 can be satisfied, thereby minimizing the occurrence of drift.

[Formula 2]

F ₁ × V ₁ + F ₂ × V ₂ = 0

In Formula 2, F ₁ and F ₂ are the flow rate (volume per unit time) flowing through each inlet, V ₁ and V ₂ is the inflow rate (distance per unit time) vector through each inlet and the ground It means a vector component projected on the cross section of the parallel distillation column (100).

In addition, one or more of the raw material inlet 121, the upper reflux inlet 112 and the lower reflux inlet 132 is formed by three openings which are spaced apart from each other 100 to satisfy the following general formula (3) Thus, it is possible to minimize the occurrence of drift.

[Formula 3]

F ₁ × V ₁ + F ₂ × V ₂ + F ₃ × V ₃ = 0

In Formula 3, F ₁ , F ₂ and F ₃ represents the flow rate (volume per unit time) flowing through each inlet, V ₁ , V ₂ and V ₃ is the inflow rate (distance per unit time) through each inlet ) Represents a vector component projected on the cross section of the distillation column 100 parallel to the ground.

At least one of the raw material inlet part 121, the upper reflux inlet part 112, and the lower reflux inlet part 132 may be formed of four distillation columns 100 spaced apart from each other to satisfy the following general formula (4). Therefore, the occurrence of drift can be minimized.

[Formula 4]

F ₁ × V ₁ + F ₂ × V ₂ + F ₃ × V ₃ + F ₄ × V ₄ = 0

In Formula 4, F ₁ , F ₂ , F ₃ and F ₄ represents the flow rate (volume per unit time) flowing through each inlet, V ₁ , V ₂ , V ₃ , and V ₄ is each inlet The inflow rate (distance per unit time) vector through represents the vector component projected on the section of the distillation column parallel to the ground.

In one embodiment, the raw material inlet 121 of the distillation column 100 may be formed of two or more openings are spaced apart from each other, the two or more openings have a cross section parallel to the ground of the distillation column (100) It may be located in two or more intermediate subregions which are divided evenly. For a column to which the raw material inlet 121 is formed of one opening, a liquid flow falls to supply only the lower region of the distillation column without being uniformly dropped, which may cause a drift phenomenon, so that the raw material (F ₁ Separation efficiency may decrease. However, when the raw material inlet 121 of the distillation column 100 is formed with two or more openings, the drift phenomenon is suppressed by being able to maintain the flow of the liquid falling down the raw material supply stage of the distillation column 100 evenly. The raw material F ₁ can be separated efficiently. In this case, the two or more openings may be located on the same stage in the distillation column 100, preferably on the same plane parallel to the ground. Accordingly, the raw material (F ₁ ) flowing into each of the two or more openings is introduced to facilitate the hydraulic flow (hydraulics) can be effectively prevented the drift phenomenon. For example, the two or more raw material inlet 121 may be located in the same stage of the distillation column 100, the distillation column 100 having a theoretical stage 30 to 80 stages, 40 to 70 stages, or 45 to 60 stages. In the case, the raw material inlet 121 forming the two or more openings may be located at 5 to 30 stages, 5 to 25 stages, or 10 to 20 stages of the distillation column (100). In addition, when the raw material (F ₁ ) is introduced into the raw material inlet 121 formed of two or more openings at the same flow rate, it is easy to block the drift phenomenon, and the operation ease of the distillation column is excellent, thereby making the raw material (F ₁ ) highly efficient. Can be separated. In addition, the raw material flowing into the raw material inlet formed by the two or more openings may be introduced at the same flow rate, thereby minimizing the occurrence of the drift phenomenon.

In another embodiment, the upper reflux inlet 112 of the distillation column 100 may be formed of two or more openings are spaced apart from each other, the two or more openings are cross-section parallel to the ground of the distillation column 100, That is, it may be located in each of two or more upper small regions that evenly divide the horizontal cross-sectional area. In the distillation tower 100 in which the upper reflux inlet 112 is formed as one opening, a reflux flow of the upper product outlet stream F ₂ may flow into the distillation tower 100 in one direction, thereby causing a drift phenomenon. . Accordingly, the separation efficiency of the raw material (F ₁ ) may be lowered, in which case additional energy is consumed to maintain the low boiling point concentration of the upper product effluent stream (F ₂ ). However, when the upper reflux inlet 112 of the distillation column 100 is formed with two or more openings, the reflux flow of the upper product outlet flow F ₂ is introduced into the distillation column in two or more directions to suppress the drift phenomenon. Therefore, the raw material F ₁ can be efficiently separated. In one example, the two or more upper reflux inlet 112 may be located on the same stage, preferably on the same plane parallel to the ground, the theoretical stage 30 to 80 stage, In the case of the distillation column 100 having 40 to 70 stages or 45 to 60 stages, the upper reflux inlet 112 formed by the two or more openings may be located at the top of the distillation column 100, for example, at the first stage. have.

In addition, the lower reflux inlet 132 of the distillation column 100 may be formed of two or more openings which are spaced apart from each other, and the two or more openings may have two or more lower portions that divide the horizontal cross-sectional area of the distillation column 100 evenly. Can be located in each small area. In this case, the bottom product effluent stream F ₃ passed through the reboiler 102 may be refluxed in two or more directions to improve the separation efficiency of the raw material F ₁ . For example, the lower reflux inlet 132 formed by the two or more openings may be located on the same stage of the bottom of the distillation column 100, preferably on the same plane parallel to the ground, and has a theoretical number of 30 to In the case of the distillation column 100 having 80 stages, 40 to 70 stages, or 45 to 60 stages, the lower reflux inlet 132 formed by the two or more openings is the lowest stage of the distillation column 100, for example, 80 stages, 70 stages. It may be located at the stage or the 60 stage.

In another embodiment, the raw material inlet 121, the upper reflux inlet 112 and the lower reflux inlet 132 of the distillation column 100 may be formed of two or more openings are all spaced apart from each other, In this case, raw materials are respectively introduced into the raw material inlet 121 formed by the two or more openings, and a part of the upper product outlet flow F ₂ is respectively the upper reflux inlet 112 formed by the two or more openings. Inflow, a portion of the bottom product outlet flow (F ₃ ) may be respectively introduced into the bottom reflux inlet 132 formed of two or more openings.

For example, the raw material inlet 121 formed by the two or more openings may be respectively located in two or more intermediate small regions that divide the cross section parallel to the ground of the distillation column 100 evenly. In this case, the two or more openings may be located on the same stage in the distillation column 100, preferably on the same plane parallel to the ground, and the upper reflux inlet 112 formed by the two or more openings may be the distillation tower ( The lower reflux inlet 132 formed by the two or more openings may be respectively located in two or more upper subregions equally dividing a cross section parallel to the ground of the ground, that is, a horizontal cross-sectional area. Can be located in two or more lower subregions that evenly divide the horizontal cross-sectional area of In this case, the two or more raw material inlet 121 may be located at the same end of the distillation column 100, and the two or more upper reflux inlet 112 is the same end of the top of the distillation column 100, preferably May be positioned on the same plane parallel to the ground, and the lower reflux inlet 132 formed by the two or more openings may be disposed on the same stage, preferably parallel to the ground, at the bottom of the distillation column 100. Can be located. Description of specific stages of the raw material inlet, the upper reflux inlet 112 and the lower reflux inlet 132 is the same as described above, and thus will be omitted. In addition, as described above, the raw materials respectively introduced into the raw material inlet formed by the two or more openings are introduced at the same flow rate, and the reflux flows respectively introduced into the upper reflux inlet formed by the two or more openings are introduced at the same flow rate, The reflux flows respectively introduced into the lower reflux inlet formed by the two or more openings may be introduced at the same flow rate, thereby minimizing the occurrence of the drift phenomenon.

Details of the raw material inlet 121, the upper reflux inlet 112, and the lower reflux inlet 132 formed by the two or more openings are the same as described above, and thus will be omitted.

9 is a view showing the distillation apparatus according to another embodiment of the present application by way of example.

The distillation apparatus according to the embodiment of the present application may include a condenser 201 and a reboiler 202, and may include a dividing wall distillation column 200 having a dividing wall 203 inside the distillation column.

As shown in FIG. 9, the distillation tower 200 included in the distillation apparatus may be a dividing wall distillation column 200 having a dividing wall 203 therein. The dividing wall distillation column 200 is a device designed for the distillation of the raw material F ₁ including three components of low boiling point, middle boiling point, and high boiling point, and is a device similar to a thermodynamic distillation column in terms of thermodynamics. . The thermocomposite distillation column is designed to separate low boiling point and high boiling point materials in a preliminary separator and to separate low boiling point, middle boiling point and high boiling point materials in a main separator, respectively. In contrast, the dividing wall distillation column 200 is a form in which the preliminary separator is integrated into the main separator by installing the dividing wall 203 in the tower.

For example, the distillation column 200 is divided into a dividing wall 203, as the inside is divided by a dividing wall 203, and the inside of the distillation column 200 is divided into a virtual dotted line in the figure. The ground may be divided into an upper region 210 and a lower region 240 where the middle region and the partition wall are not located. In addition, the middle region may be divided into a first middle region 220 and a second middle region 230 divided by the dividing wall 203. Therefore, the inside of the distillation column 200 may be divided into an upper region 210, a lower region 240, and an intermediate region. In addition, the intermediate region may include a first intermediate region 220 and a second intermediate region. It may be divided into the subregions 230. In the dividing wall distillation column of the present application, the first middle region 220 and the second middle region 230 are separated or isolated from each other by the separating wall 203. Accordingly, the flow in the first middle region 220 and the flow in the second middle region 230 may be prevented from being mixed with each other. As used herein, the term "separation or isolation" means that the flow in each region flows or exists independently in the region divided by the separating wall 401.

In one example, the dividing wall 203 located inside the distillation column 200 may be located in the middle region. Specifically, when the length of the dividing wall 203 is calculated based on the theoretical number of stages of the distillation column 200, the length of the dividing wall 203 may be a length corresponding to more than 40% of the theoretical number of stages, for example, 50% or more. , Or 60% or more of the singular length. The dividing wall 203 of the distillation column 200 is located inside the distillation column 200 in the length of the range, so that the flow in the first middle region 220 and the flow in the second middle region 230 are mixed. You can effectively block yourself from becoming. In addition, it is possible to prevent the low-boiling components are mixed in the flow outflow from the product outlet 231 to flow out.

In one example, the raw material inlet 221 of the distillation column 200 may be located in the first middle region 220 of the distillation column 200. In addition, the upper outlet 211 and the upper reflux inlet 212 may be located in the upper region 210 of the distillation column 200, preferably, the upper outlet 211 is the distillation column 200 It may be located on the top in the upper region 210 of the). In addition, the lower outlet 241 and the lower reflux inlet 242 may be located in the lower region 240 of the distillation column 200. Preferably, the lower outlet 241 is the distillation column 200. It may be located at the bottom in the lower region 240 of the). Further, the distillation column may include a product outlet 231, and the product outlet 231 may be located in the second middle region 230 of the distillation column 200.

In one example, in order to perform a separation process from the raw material (F ₁ ) comprising three components of low boiling point, middle boiling point and high boiling point, the raw material (F ₁ ) is a first intermediate of the distillation column 200 as shown in FIG. It may flow into the subregion 220. In one example, the raw material (F ₁ ) is introduced into the raw material inlet 221 located in the first middle portion region 220 of the distillation column 200, and the relative among the components included in the raw material (F ₁ ) As a result, a low boiling point stream having a low boiling point is introduced into the upper region 210, and a middle boiling point stream and a high boiling point stream having a relatively high boiling point are introduced into the lower region 240. In addition, the low boiling point flow introduced into the upper region 210 flows from the upper outlet 211 to the upper product outlet flow (F ₂ ), and part of the upper reflux inlet of the distillation column 200 via the condenser 201. Refluxed to 212 or stored as a product. In addition, the high boiling point flow introduced into the lower region 240 flows from the lower outlet portion 241 to the lower product outlet flow F ₃ , and part of the lower reflux of the distillation column 200 through the reboiler 202. It is refluxed to inlet 242 or stored as a product. The flow of the component having a relatively high boiling point among the flow introduced into the upper region 210 and the flow of the component having a relatively low boiling point among the flow introduced into the lower region 240, that is, the middle boiling point flow is the second middle portion. Flows into the region 230 and may flow out of the product outlet 231 of the second intermediate region 230. The "medium boiling point flow" refers to a rich flow of a component having a boiling point between a low boiling point component and a high boiling point component in a raw material stream including three components of a low boiling point, a middle boiling point and a high boiling point component. For example, the flow refers to a flow flowing out of the product outlet 231 of the distillation column 200.

In one embodiment of the present application, one or more of the raw material inlet 221 and the product outlet 231 of the dividing wall distillation column 200 may be formed of two or more openings spaced apart from each other. Accordingly, by blocking the channeling generated in the purification process of the raw material (F ₁ ) it is possible to minimize the energy loss and to improve the economics of the process.

In one example, in order to prevent the drift phenomenon, the two or more openings may be positioned so that the flow into or out of the dividing wall distillation column 200 may flow in two or more directions or may flow in two or more directions. . For example, the first middle portion region 220 of the dividing wall distillation column 200 may include two or more first middle portion regions that divide the horizontal cross-sectional area of the distillation column 200 evenly. 10 is a cross-sectional view parallel to the ground of the middle portion of the exemplary dividing wall distillation column 200. As shown in FIG. 10, the middle region of the dividing wall distillation column 200 is divided into a first middle region 220 and a second middle region 230 divided by the dividing wall 203. The middle region 220 comprises any small area, for example a plurality of first intermediate

small regions

220a and 220b, which divides the horizontal cross-sectional area of the distillation column 200 into equal areas. Similarly, the second middle region 230 may also include any of a plurality of second

middle region

230a, 230b dividing the horizontal cross-sectional area of the distillation column 200 by an equal area. Preferably, the first

middle subregions

220a and 220b and the second

middle subregions

230a and 230b have horizontal cross-sectional areas of the first middle region 220 and the second middle region 230, respectively. It may be an area dividing by an equal area.

In one example, the product inlet 221 of the first middle region 220 and / or the product outlet 231 of the second middle region 230 of the dividing wall distillation column 200 may have two or more openings. In this case, the raw material inlet 221 formed by the two or more openings are respectively located in the two or more first intermediate portion small region, the product outlet 231 is formed by the two or more openings It may be located in each of the two or more second intermediate portion small region. 11 is a view exemplarily showing a cross section parallel to the ground of the middle region of the dividing wall distillation column 200 according to the present application in which two openings are formed. For example, as divided by an imaginary dotted line in FIG. 11, the first middle region 220 may include two equal first middle region

small regions

220a and 220b, and the partition wall type. When the raw material inlet 221 of the distillation column 200 is formed of two openings spaced apart from each other, one opening may be one middle small region of one of the two first middle

small regions

220a and 220b. One opening in each region by being located at 220a, and the other one opening is located in the other middle small region 220b adjacent to the middle small region 220a where the one opening is located. can do.

In the case of the dividing wall distillation column 200 in which the raw material inlet 221 is formed as one opening, the raw material F ₁ is supplied only in one direction, in which case, a drift phenomenon may occur. However, when the raw material inlet 221 of the dividing wall distillation column 200 is formed with two or more openings, the drift phenomenon may be prevented by inflowing the raw material F ₁ evenly in two or more directions.

In the dividing wall distillation column 200 according to the present application, the drift phenomenon can be effectively suppressed by adjusting the position, the flow rate and the direction of each opening according to the number of two or more openings. For example, when the raw material inlet 221 of the dividing wall distillation column 200 is formed of two openings, as described above, the two raw material inlets 221 are the first intermediate region 220. ), The cross section parallel to the ground may be positioned in the first

intermediate region

220a, 220b divided into two evenly. In this case, the angle of the extension line extending from the one of the two openings to the center of the distillation column 200 and the extension line extending from the other opening to the center of the distillation column 200 is 85 ° to 95 °, It may be 87 ° to 93 °, or 89 ° to 91 °, by adjusting the angle in the above range, it is possible to maximize the blocking of the drift phenomenon. Also, in this case, the direction of the vector component of each raw material (F ₁ ) flow flowing through the two raw material inlet 111 can all be directed toward the center point of the cross section parallel to the ground of the dividing wall distillation column 200. For example, the inflow velocity vector component projected in the cross section of each of the raw material streams is perpendicular to the dividing wall 203 passing through the center point of the cross section parallel to the ground of the dividing wall distillation column 200. The surfaces 2031 may be symmetrical with respect to one another.

12 is a view exemplarily showing a cross section parallel to the ground of the middle region of the dividing wall distillation column 200 according to the present application in which three openings are formed. As shown in FIG. 12, for example, the raw material inlet 111 of the dividing wall distillation column 200 may be formed of three openings spaced apart from each other, and the three openings may be formed in the first intermediate region ( Each of the first

intermediate portions

220a, 220b, and 220c divided into three equally divided sections parallel to the ground of the ground may be located. In this case, an extension line extending from one of the three openings of the dividing wall distillation column 200 to the center of the distillation column 200 extends from the opening adjacent to the one opening to the center of the distillation column 200. The angle formed with, may be 55 ° to 65 °, 57 ° to 63 °, or 59 ° to 61 °, by adjusting the angle in the above range, it is possible to maximize the blocking of the drift phenomenon. In this case, by adjusting the flow rate and the inflow rate of the flow flowing into each of the three openings in the same manner, it is possible to substantially prevent the occurrence of the drift phenomenon.

FIG. 13 is a diagram exemplarily showing a cross section parallel to the ground of the dividing wall distillation column 200 having four openings. As shown in FIG. 13, for example, the raw material inlet 221 of the dividing wall distillation column 200 may be formed of four openings spaced apart from each other, and the four openings may be formed in the first intermediate region ( Each of the first

intermediate portions

220a, 220b, 220c, and 220d divided into four equally divided sections parallel to the ground of the ground may be located. In this case, an extension line extending from one of the four openings of the dividing wall distillation column 200 to the center of the distillation column 200 extends from the opening adjacent to the one opening to the center of the distillation column 200. And the angle of 40 ° to 50 °, 42 ° to 48 ° or 44 ° to 46 °, by adjusting the angle in the above range, it is possible to maximize the blocking of the drift phenomenon. In this case, by adjusting the flow rate and the inflow rate of the flow flowing into the four openings, respectively, it is possible to substantially prevent the occurrence of the drift phenomenon.

In one embodiment, the raw material inlet 221 of the dividing wall distillation column 200 may be formed of two or more openings are spaced apart from each other, the two or more openings and the ground of the dividing wall distillation column 200 It may be located in each of two or more first intermediate small regions which equally divide the parallel cross section, preferably dividing the horizontal cross-sectional area of the first intermediate region 220 by an equal area. In the case of the dividing wall distillation column 200 in which the raw material inlet 221 is formed as one opening, the liquid flow falling into the lower region of the feed end of the dividing wall distillation column does not fall evenly, and a drift phenomenon may occur. Accordingly, the separation efficiency of the raw material (F ₁ ) may be lowered. However, when the raw material inlet 221 of the dividing wall distillation column 200 is formed of two or more openings, the flow of liquid falling into the lower portion of the raw material supply stage of the dividing wall distillation column 200 may be maintained evenly. Since the drift phenomenon is suppressed, the raw material F ₁ can be separated efficiently. In this case, the two or more openings may be located at the same end in the first intermediate region 220. Accordingly, the raw material (F ₁ ) flowing into each of the two or more openings is introduced to facilitate the hydraulic flow (hydraulics) can be effectively prevented the drift phenomenon. For example, the two or more raw material inlet 221 may be located on the same stage in the first middle region 220 of the dividing wall distillation column 200, preferably on the same plane parallel to the ground, In the case of the dividing wall distillation column 200 having a theoretical stage of 30 to 80 stages, 40 to 70 stages, or 45 to 60 stages, the raw material inlet 221 formed of the two or more openings may be formed by 5 It may be located in 30 to 30, 5 to 25, or 10 to 20. In addition, when the raw material F ₁ is introduced into the raw material inlet 111 formed of two or more openings at the same flow rate, it is easy to block the drift phenomenon, and the operation ease of the distillation column is excellent, thereby making the raw material F ₁ highly efficient. Can be separated.

According to another embodiment of the present application, the second middle region 230 of the dividing wall distillation column 100 divides the horizontal cross-sectional area of the distillation column 200 by an equal area, preferably, the second middle region ( It may include a plurality of second intermediate region small area dividing the horizontal cross-sectional area of 230 by an equal area. At this time, the product outlet 231 of the dividing wall distillation column 200 may be formed of two or more openings which are spaced apart from each other, wherein the two or more openings may be respectively located in the two or more second intermediate small regions. Can be. 14 exemplarily shows a cross section parallel to the ground of the dividing wall distillation column 200 in which two openings are formed. For example, as divided by a phantom dotted line in FIG. 14, the second middle region 230 may include two equal second middle region

small regions

230a and 230b, and the partition wall type. When the product outlet 231 of the distillation column 200 is formed of two openings spaced apart from each other, one opening is the middle small region of one of the two second middle

small regions

230a and 230b. One opening in each region by being located at 230a, and the other one opening is located in the other middle small region 230b adjacent to the middle small region 230a in which the one opening is located. can do. In the case of the dividing wall distillation column 200 in which the product outlet part 231 is formed by one opening, the product is discharged only in one direction, in which case, a drift phenomenon may occur. Accordingly, the separation efficiency of the raw material F ₁ may be reduced, in which case additional energy is consumed to maintain the middle boiling point concentration of the product effluent stream F ₄ . However, when the product outlet 231 of the dividing wall distillation column 200 is formed with two or more openings, the product outflow flow may be evenly flowed out in two or more directions to prevent the drift phenomenon.

In one example, the two or more product outlets 231 may be located on the same stage, preferably parallel to the ground, in the second intermediate region 230 of the dividing wall distillation column 200. . For example, in the case of the dividing wall distillation column 200 having theoretical stages of 30 to 80 stages, 40 to 70 stages, or 45 to 60 stages, the product outlet part 231 formed of the two or more openings may be the dividing wall distillation column ( 200 to 5 to 30, 5 to 25, or 10 to 20 can be located.

Details of the product outlet 231 is the same as described in the above-described raw material inlet 221, and will be omitted.

In one embodiment, the raw material inlet 221, the upper reflux inlet 212, the product outlet 231 and the lower reflux inlet 242 of the dividing wall distillation column 200 are all formed by two or more openings It is possible to maximize the blocking of the drift caused by the reflux flow. The above-described embodiment of the upper reflux inlet 212 and the lower reflux inlet 242 of the dividing wall distillation column 200 may be applied to correspond to the upper outlet 211 and the lower outlet 241 as it is. . Detailed description thereof will be omitted as it is the same as described above.

The present application relates to a distillation method of a mixture using the distillation apparatus described above. In one example, the method comprises distilling the raw material into the raw material inlet of the distillation column formed of two or more openings in which one or more of the raw material inlet, the upper reflux inlet, and the lower reflux inlet are spaced apart from each other. It includes, and according to the distillation method of the present application, it is possible to minimize the drift phenomenon, it is possible to improve the separation efficiency.

The distillation apparatus of the present application can be used in various chemical industries. For example, it may be used in a process of separating a mixture such as crude oil, but is not limited thereto.

According to the distillation apparatus of this application, the separation efficiency which arises at the time of separation of a mixture can be improved, and separation efficiency can be improved and energy saving can be aimed at.

2 is a cross-sectional view parallel to the ground of an exemplary distillation column.

3 and 4 are views exemplarily showing a cross section parallel to the ground of the distillation column according to the present application in which two openings are formed.

5 and 6 are views exemplarily showing a cross section parallel to the ground of the distillation column according to the present application in which three openings are formed.

7 and 8 are views exemplarily showing a cross section parallel to the ground of the distillation column according to the present application in which four openings are formed.

9 is a view showing an exemplary distillation apparatus according to another embodiment of the present application.

10 is a cross-sectional view parallel to the ground of an exemplary dividing wall distillation column middle region.

11 and 14 exemplarily show cross sections parallel to the ground of the middle region of the dividing wall distillation column according to the present application in which two openings are formed.

12 is a view exemplarily showing a cross section parallel to the ground of the middle region of the dividing wall distillation column according to the present application in which three openings are formed.

13 is a view exemplarily showing a cross section parallel to the ground of the middle region of the dividing wall distillation column according to the present application in which four openings are formed.

Hereinafter, the present application will be described in more detail with reference to examples according to the present application and comparative examples not according to the present application, but the scope of the present application is not limited to the examples given below.

실시예 1Example 1

2-ethylhexyl acrylate was purified using the distillation apparatus of FIG. Specifically, the raw material of 20 to 40 ℃ containing 2-ethylhexyl acrylate was introduced into the two raw material inlet is formed in the 15 stage of the first distillation column of 60 stage theoretical stage formed as shown in FIG. The flow rate flowing into the raw material inlet was adjusted in the same manner.

In this case, the operating pressure of the top of the first distillation column is about 20 to 30 torr, the operating temperature is about 90 to 105 ℃, the operating pressure of the bottom of the first distillation column is about 80 to 90 torr, the operating temperature is It was made to be 140-147 degreeC. A part of the flow discharged from the first stage of the first distillation column was refluxed to the first distillation column via a condenser, and a part of the flow discharged from the 60 stage of the first distillation column was refluxed to the first distillation column via a reboiler, At this time, the reflux ratio of the first distillation column top effluent stream of the first distillation column was set to 1.5 to 4.5, and the reflux ratio of the first distillation column bottom effluent stream was set to 10 to 20.

실시예 2Example 2

Raw material inlet part The upper reflux inlet part is formed by two openings, respectively, and the two raw material inlet parts are located in 15 stages of the first distillation column having 60 theoretical stages, and the two upper reflux inlets are 1 in the distillation column having 60 theoretical stages. Purification was carried out in the same manner as in Example 1, except that the distillation column formed to be located at the stage was used.

실시예 3Example 3

The raw material inlet and the lower reflux inlet are each formed by two openings, and the two raw material inlets are located in 15 stages of the first distillation column having the theoretical stage of 60 stages, and the two lower reflux inlets of the first stage having the theoretical stage of 60 stages. Purification was carried out in the same manner as in Example 1, except that the distillation column formed to be located at 60 stages of the distillation column was used.

실시예 4Example 4

The raw material inlet, the lower reflux inlet, and the upper reflux inlet are each formed of two openings, and the two raw inlets are located at 15 stages of the distillation column having 60 theoretical stages, and the two lower reflux inlets are distillation column. It was purified in the same manner as in Example 1 except that the column was located at 60 stages of the 60-stage distillation column, and the two upper reflux inlets were positioned at the first stage of the distillation column having 60-stage theoretical stages.

실시예 5Example 5

A distillation wall type distillation column having a dividing wall as shown in FIG. 9 was purified in the same manner as in Example 1 except that the distillation column was used as the first distillation column. A raw material containing 2-ethylhexyl acrylate was introduced into the raw material inlet formed by the two openings located in the first middle region of the distillation column, and specifically, into the 15 stage of the first distillation column having 60 theoretical stages. .

실시예 6Example 6

The raw material inlet and the product outlet are each formed of two openings, the two raw material inlets are located in the first intermediate region, and are located at the 15th stage of the distillation column having 60 theoretical stages, and the two product outlets. The part was purified in the same manner as in Example 5, except that the distillation column was positioned in the second intermediate region, and the distillation column was positioned in 15 stages of the distillation column having 60 theoretical stages.

실시예 7Example 7

The raw material inlet was formed by three openings, and the three raw material inlets were purified in the same manner as in Example 1 except for using a distillation column formed as shown in FIG. 5.

실시예 8Example 8

The raw material inlet was formed by four openings, and the four raw material inlets were purified in the same manner as in Example 1 except for using a distillation column formed as shown in FIG. 7.

비교예 Comparative example

Purification was carried out in the same manner as in Example 1, except that a distillation column having one raw material inlet, an upper reflux inlet, and a lower reflux inlet was used.

After separating the raw materials according to the Examples and Comparative Examples, it was measured whether the drift phenomenon occurs in the separation process, the results are shown in Table 1 below.

Table 1

	Comparative example	Example 1	Example 2	Example 3	Example 4	Example 5	Example 6	Example 7	Example 8
Drift phenomenon	○	×	×	×	×	×	×	×	×

* ×: no drift

* ○: Drift phenomenon occurs

As shown in Table 1, when the raw material is separated according to a comparative example using a distillation column formed with a single opening, the raw material inlet, the upper reflux inlet and the lower reflux inlet, the drift phenomenon occurs. In an exemplary embodiment in which one or more of the upper and lower reflux inlets and the lower reflux inlet are formed of two or more openings, it may be confirmed that no drift phenomenon occurs in the separation process of the raw materials as compared with the comparative example.

Therefore, when the raw material is purified by a dividing wall distillation column that forms two or more inlet and outlet parts of the present application, the separation efficiency of the raw material can be improved as compared to the distillation apparatus according to the comparative example.

Claims

A distillation column equipped with a condenser and a reboiler,

The distillation column has an upper region; Lower region; And an intermediate region between the upper region and the lower region,

The middle portion region includes a raw material inlet,

The raw material introduced into the raw material inlet is separated and discharged into an upper product outlet stream and a lower product outlet stream,

The upper product outlet stream exits the upper region and a portion of the upper product outlet stream passes through a condenser to the upper reflux inlet located in the upper region,

The bottom product outlet stream exits the bottom region, a portion of the bottom product outlet stream passes through a reboiler and is refluxed to a bottom reflux inlet located in the bottom region,

One or more of the raw material inlet, the upper reflux inlet and the lower reflux inlet is formed by two or more openings spaced apart from each other.
The method of claim 1, wherein the middle region is divided into two or more middle subregions equally dividing the horizontal cross-sectional area of the distillation column, and the raw material inlet is formed of two or more openings spaced apart from each other, wherein the two or more openings Distillation apparatuses respectively located in the middle section of the above.
3. The distillation apparatus according to claim 2, wherein the two or more openings are located at the same stage in the intermediate region.
The distillation apparatus according to claim 2, wherein the raw material inlets are formed of two or more openings spaced apart from each other, and the raw materials respectively introduced into the two or more openings are introduced at the same flow rate.
The upper region is divided into two or more upper subregions equally dividing the horizontal cross-sectional area of the distillation column, the upper reflux inlet is formed of two or more openings spaced apart from each other, the two or more openings Distillation apparatus located in the upper small area.
6. The distillation apparatus according to claim 5, wherein the two or more openings are located at the same stage in the upper region.
6. The distillation apparatus according to claim 5, wherein the reflux streams respectively introduced into the two or more openings are introduced at the same flow rate.
The lower region is divided into two or more lower subregions equally dividing the horizontal cross-sectional area of the distillation column, the lower reflux inlet is formed by two or more openings spaced apart from each other, the two or more openings Distillation units located in the lower subarea respectively.
9. The distillation apparatus according to claim 8, wherein the two or more openings are located at the same stage in the lower region.
9. The distillation apparatus of claim 8, wherein the reflux streams respectively introduced into the two or more openings are introduced at the same flow rate.
The distillation apparatus according to claim 1, which satisfies the following general formula (1):

[Formula 1]

-5 ° ≤ ΔD ≤5 °

In Formula 1, ΔD is an extension line extending from one of the two or more openings to the center of the distillation column extending from one or two openings adjacent to the one opening to the center of the distillation column and The difference of two angles to form is shown.
The method of claim 1, wherein at least one of the raw material inlet, the upper reflux inlet, and the lower reflux inlet is formed by two openings,

And an extension line extending from one of the two openings to the center of the distillation column and an extension line extending from the other opening to the center of the distillation column is 175 ° to 185 °.
The method of claim 1, wherein at least one of the raw material inlet, the upper reflux inlet, and the lower reflux inlet is formed with three openings,

And an extension line extending from one of the three openings to the center of the distillation column and an extension line extending from the remaining two openings to the center of the distillation column is 115 ° to 125 °.
The method of claim 1, wherein at least one of the raw material inlet, the upper reflux inlet, and the lower reflux inlet is formed by four openings,

And an extension line extending from one of the four openings to the center of the distillation column and an extension line extending from the two openings adjacent to the one opening to the center of the distillation column are 85 ° to 95 °.
The method of claim 1, wherein the raw material inlet, the upper reflux inlet and the lower reflux inlet are each formed of two or more openings spaced apart from each other,

Raw material is respectively introduced into the raw material inlet formed by the two or more openings, and a portion of the upper product outlet flow is respectively introduced into and refluxed into the upper reflux inlet formed by the two or more openings, and a portion of the lower product outlet flow is Distillation apparatus that is introduced into the lower reflux inlet formed by the above opening to reflux.
17. The middle section of claim 15 wherein the middle section is divided into two or more middle subregions that divide the horizontal cross-sectional area of the distillation column evenly, and the upper region is divided into two or more upper subregions that evenly divide the horizontal cross-sectional area of the distillation column. Is divided into at least two lower subareas equally dividing the horizontal cross-sectional area of the distillation column,

The raw material inlet formed by the two or more openings is located in each of the two or more intermediate small regions, and the upper reflux inlet formed by the two or more openings is located in the two or more upper small regions, respectively, and the lower reflux inlet formed by the two or more openings. And distillation apparatuses respectively located in the two or more lower subregions.
16. The method according to claim 15, wherein the raw material inlet formed by the two or more openings is located at the same end in the middle region, and the upper reflux inlet formed by the two or more openings is located in the same stage in the upper region, and is formed by the two or more openings. The bottom reflux inlet is located at the same stage in the bottom region of the distillation apparatus.
16. The method of claim 15, wherein the raw material introduced into each of the raw material inlet formed by the two or more openings are introduced at the same flow rate, the reflux flows respectively introduced into the upper reflux inlet formed by the two or more openings are introduced at the same flow rate, two or more Distillation apparatus which flows into the reflux flow inlet to the lower reflux inlet formed by the opening at the same flow rate.
19. The distillation column according to any one of claims 1 to 18, wherein the distillation column is a dividing wall type distillation column having a dividing wall therein, and the middle region of the distillation column is the first middle region and the second dividing portion divided by the dividing wall. A middle section, wherein the first middle section comprises a feed inlet and the second middle section comprises a product outlet.
20. The distillation apparatus according to claim 19, wherein the raw material inlet and / or the product outlet are formed by two or more openings.
21. The distillation apparatus according to claim 20, wherein the raw material inlet and / or the product outlet formed by the two or more openings are respectively located in the two or more first middle subregions that equally divide the horizontal cross-sectional area of the first middle region.
22. The method of claim 21 wherein the feed inlet and / or the product outlet is formed by two openings, an extension line extending from one of the two openings to the center of the distillation column from the other opening to the center of the distillation column. Distillation apparatus is an angle formed by the extension line is 85 ° to 95 °.
22. The distillation column according to claim 21, wherein the raw material inlet and / or the product outlet are formed of three openings, and an extension line extending from one of the three openings to the center of the distillation column from the opening adjacent to the one opening. Distillation apparatus of an angle with the extension line extending to the center of 55 ° to 65 °.
22. The distillation column according to claim 21, wherein the raw material inlet and / or the product outlet are formed by four openings, and an extension line extending from any one of the four openings to the center of the distillation column from the opening adjacent to the one opening. Distillation apparatus is an angle formed with an extension line extending to the center of 40 ° to 50 °.
Distillation method comprising the step of distilling the raw material into the raw material inlet portion of the distillation column is formed of two or more openings in which at least one of the raw material inlet, the upper reflux inlet and the lower reflux inlet are spaced apart from each other.