JPH0725934U - Stage tower gas-liquid contactor - Google Patents

Abstract

(57) [Summary] [Purpose] Even when the amount of liquid introduced into the tower is small, or when the flow velocity of the liquid flowing down the perforated plate is high, etc.
(EN) Provided is a column-column type gas-liquid contact device capable of always performing sufficient gas-liquid contact. [Structure] A plurality of perforated plates 5 and 10 for gas-liquid contact in which a large number of gas passage holes 5a and 10a are bored are arranged in multiple stages in a tower, and the perforated plates 5 and 10 are inclined. Of the perforated plates 5 and 10 which are vertically stacked in a state in which the directions are alternately reversed and are vertically stacked, the lower part of the perforated plate 5 located on the upper side and the perforated plate 10 located on the lower side. The liquid receiving parts 9 and 14 are interposed between the upper part and the upper part, and
The baffles 6 and 11 are erected on the ends of the
The liquid flowing down the perforated plates 5 and 10 is dammed and then overflowed from the baffle plates 6 and 11.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a column-column gas-liquid contactor such as a distillation column used in the fields of petroleum refining, petrochemistry, alcohol, general chemistry and the like.

[0002]

[Prior art]

 Conventionally, columnar distillation columns have been widely used in fields such as petroleum refining, petrochemistry, alcohol, and general chemistry. As a distillation tray to be installed in this column-type distillation column, generally, a bubble bell-shaped tray having a complicated structure but good efficiency, or a porous tray having a relatively narrow safe operation range but a simple structure. Various trays such as plate-shaped trays have been developed. In particular, in the above-mentioned perforated plate type tray, in which the perforated plates are arranged in multiple stages in an inclined manner has the advantages that the throughput is improved and the efficiency is improved like a bubble bell type tray. It is often used. As a gas-liquid contact device using such an inclined porous plate type tray, a gas cleaning device disclosed in Japanese Patent Application Laid-Open No. 48-20759 is disclosed. As shown in FIG. 10, a multi-hole plate 51 is slanted in four stages in the housing 50, and the upper end of the uppermost perforated plate 51 is provided in the upper part of the housing 50 to supply a cleaning liquid. It communicates with the chamber 52. Further, the supply duct 54 is connected to the introduction port 53 provided in the lower portion of the housing 50, and the circulation duct 57 with the centrifugal fan 56 is connected to the discharge port 55 provided in the ceiling wall. Then, the pollutant gas supplied from the supply duct 54 is introduced into the housing 50 from the introduction port 53, and the cleaning liquid supplied to the compartment 52 is sent to the uppermost perforated plate 51 to supply the lowermost holes. It is made to flow down to the plate 51, whereby the polluted gas is brought into contact with the cleaning liquid while rising in the housing 50 and cleaned, and then taken out from the circulation duct 57.

[0003]

[Problems to be solved by the device]

 In the distillation column as described above, when the amount of the pollutant gas supplied to the housing 50 is small or the degree of pollution is low, the amount of the cleaning liquid introduced into the housing 50 is reduced, or the amount of the cleaning liquid introduced into the housing 50 is reduced. The speed of the cleaning liquid flowing down on the plate 51 is increased. However, in this case, the liquid phase of the cleaning liquid flowing down on the perforated plate 51 becomes thin, and the cleaning liquid suddenly drops from the perforations of the perforated plate 51 and is temporarily (or momentarily) on the perforated plate 51. It often happens that there is almost no cleaning solution. Therefore, the contaminated gas passing through the perforated plate 51 cannot come into contact with the cleaning liquid, and the contaminated gas cannot be sufficiently cleaned with the cleaning liquid.

The present invention has been made in view of such circumstances, and is sufficient even when the introduction amount of the liquid introduced into the column is small or when the flow velocity of the liquid flowing down on the perforated plate is high. It is an object of the present invention to provide a column-column gas-liquid contactor capable of performing various gas-liquid contacts.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the staged column gas-liquid contactor of the present invention has a plurality of perforated plates for gas-liquid contact in a multi-stage structure in the tower, which has a large number of holes for gas passage on its plate surface. The perforated plates are stacked in a vertically stacked manner in a state in which the inclination directions thereof are alternately reversed, and the perforated plates located on the upper side of the vertically adjacent perforated plates are stacked. The liquid receiving part is interposed between the lower part and the upper part of the perforated plate located on the lower side, and the baffle plate for blocking the liquid is erected at the end of each of the perforated plates, and the perforated plate flows down with this baffle plate. It is configured so that the liquid to be blocked is blocked and then overflows from the baffle plate.

[0006]

[Action]

 That is, in the column-column gas-liquid contactor of the present invention, a baffle plate is erected at the end of each perforated plate that is arranged in multiple stages in the tower, and the liquid that flows down the perforated plate is dammed by this baffle plate. It is configured to overflow from the baffle after being stopped. Therefore, even when the amount of liquid introduced into the tower is small or when the velocity of the liquid flowing down the perforated plate is high, the liquid is blocked by the baffle plate on each perforated plate and the liquid is blocked near the baffle plate. The liquid phase is thicker than the thin liquid phase in the conventional example. Therefore, the liquid mainly falls from the pores of the perforated plate near the baffle plate (thick portion of the liquid phase), and the liquid drops from the perforated plate portion (thick portion of the liquid phase) away from the baffle plate. Almost no liquid falls, and the liquid phase always exists in this part. Thus, the gas for gas-liquid contact always passes through the pores of the perforated plate in the thin portion of the liquid phase and comes into contact with the liquid, so that sufficient gas-liquid contact can be performed.

Next, this invention will be described in detail based on embodiments.

[0008]

【Example】

 FIG. 1 shows an embodiment of a gas column-liquid contactor (distillation column) used in this invention. In the figure, 1 is a column main body (diameter approximately 2 m) formed in a cylindrical shape, and inclined perforated plate bodies 2 are arranged in multiple stages inside thereof. These inclined porous plate members 2 are configured by integrally connecting an upper inclined plate member 3 and a lower inclined plate member 4 with a plurality of support rods (not shown).

As shown in FIG. 2, the upper inclined porous plate body 3 has an annular upper porous plate 5 that is formed in a downward slope toward the inside, and an inner circumference of a lower end opening of the upper porous plate 5. A cylindrical upper baffle plate 6 (height approximately 60 mm) attached to the surface in a liquid-tight and air-tight manner, and an annular upper overflow plate 7 (height upright at the upper end of the upper porous plate 5). 30 mm) and a flange 8 that extends horizontally from the upper end of the upper porous plate 5 toward the outside. The upper end face of the upper baffle plate 6 and the upper end face of the upper overflow plate 7 are the same. It is formed to be high. Further, the outer peripheral surface of the upper overflow plate 7, a portion of the inner peripheral surface of the tower body 1 facing the upper overflow plate 7 and a portion surrounded by the upper surface of the collar portion 8 are annular upper liquid receiving portions 9 Is formed in. In the figure, 5a is a round hole (diameter approximately 3 to 10 mm) formed in the upper porous plate 5 for vapor passage.

As shown in FIG. 3, the lower inclined perforated plate body 4 includes an annular lower perforated plate 10 formed in a downward inclination toward the outside and a lower end portion of the lower perforated plate 10. A cylindrical lower baffle plate 11 (height: about 60 mm) mounted liquid-tightly and airtightly on the outer peripheral surface, a ceiling plate 12 covering the upper end opening of the lower porous plate 10, and a ceiling plate 12 of this ceiling plate 12. It is composed of an annular lower overflow plate 13 (height approximately 30 mm) which is erected on the outer peripheral portion, and the upper end surface of the lower baffle plate 11 and the upper end surface of the lower overflow plate 13 have the same height. It is formed to be small. A portion surrounded by the inner peripheral surface of the lower overflow plate 13 and the upper surface of the ceiling plate 12 is formed in the lower liquid receiving portion 14. In the figure, 10a is a round hole (diameter about 3 to 10 mm) for passing steam, which is formed in a large number in the lower porous plate 10.

When the inclined perforated plate body 2 is manufactured by using the upper inclined perforated plate body 3 and the lower inclined perforated plate body 4, as shown in FIG. 4, the lower end surface of the upper baffle plate 6 is over the lower side. It is designed to be lower than the upper end surface of the flow plate 13. Further, such inclined perforated plate bodies 2 were mounted in multiple stages inside the tower body 1 (when mounting the inclined perforated plate bodies 2 on the tower body 1, the outer peripheral surface of the collar portion 8 was attached to the inner peripheral surface of the tower body 1). In the case of welding and joining), the lower end surface of the lower baffle plate 11 is made lower than the upper end surface of the upper overflow plate 7.

The above distillation column is used, for example, in the miscella oil distillation apparatus shown in FIG. In this miscellaneous oil distillation apparatus, the inclined perforated plate bodies 2 are arranged in six stages in the column body 1 of the distillation column. Further, the tower body 1 is connected at its lower portion with an oil take-out pipe 15 and a steam introducing pipe 16, and at its upper portion, an oil supply pipe 17 communicating with the upper liquid receiving portion 9 of the uppermost inclined porous plate body 2. Are connected to the ceiling, and vapor extraction pipes 18 communicating with the condenser 19 are connected to the ceiling thereof. On the other hand, the steam introducing pipe 16 is connected to the heat exchanger 20. The hot air inlet 20a of the heat exchanger 20 is connected to the air heater 21, the hot air outlet 20b is connected to the hot air circulation fan 22, and the air heater 21 and the hot air circulation fan 22 are connected by the connecting pipe 23, so that the heat A circulation path for hot air generation, which includes an exchanger 20, an air heater 21, a hot air circulation fan 22 and the like, is provided. In the figure, 24 is a discharge pipe, 25 is a return passage, and 26 is a heating passage.

Using such a miscella oil distillation apparatus, miscella oil A is distilled as follows. That is, first, as shown in FIG. 1, the miscella oil A is supplied from the oil supply pipe 17 to the upper liquid receiving portion 9 of the uppermost inclined porous plate body 2. Next, the miscella oil A introduced into the upper side liquid receiving portion 9 is stored in the upper side liquid receiving portion 9 and then passes over the upper side overflow plate 7 to flow down on the upper porous plate 5 to the upper baffle plate 6. It is blocked and stored on the upper porous plate 5. Next, the miscella oil A accumulated on the upper porous plate 3 crosses over the upper baffle plate 6 and flows into the lower liquid receiving portion 14 where it is accumulated, and then on the lower overflow plate 13. It flows down over the lower porous plate 10, is blocked by the lower baffle plate 11, and is accumulated on the lower porous plate 10. After that, the miscella oil A accumulated on the lower porous plate 10 gets over the lower baffle plate 11 and flows into the upper liquid receiving portion 9 of the second slanted porous plate body 2, and in the same manner as above. Then, the slanted perforated plate body 2 is flown down, and the slanted perforated plate body 2 at the lowermost stage is completely flowed down. On the other hand, steam is supplied into the tower body 1 from the steam introducing pipe 16. The supplied water vapor ascends in the tower body 1 while passing through the holes 5a and 10a of the perforated plates 5 and 10, and contacts the miscella oil A on each of the perforated plates 5 and 10 during this time, and thus in the miscella oil A. Remove hexane and water. In this way, the water vapor rises to the upper part of the tower body 1, then is introduced into the condenser 19 through the vapor extraction pipe 18, and is discharged to the outside from the discharge pipe 24. Further, the miscella oil A distilled as described above is taken out as a product from the oil take-out pipe 15.

As described above, in the above embodiment, the baffle plates 6 and 11 are erected on the perforated plates 5 and 10, respectively, so that the miscella oil A can be blocked on the perforated plates 5 and 10. Therefore, even if the amount of the miscella oil A introduced into the tower main body 1 is reduced or the flow rate of the miscella oil A flowing down on each porous plate 5, 10 is increased, each porous plate 5 , 10 does not fall out of the miscella oil A all at once from the pores 5a and 10a. Moreover, when mounting the inclined porous plate body 2 on the inner peripheral surface of the tower body 1, it suffices to weld the outer peripheral surface of the collar portion 8 of the upper inclined porous plate body 3 to the inner peripheral surface of the tower body 1, and to mount it. The time required for work is halved.

6 and 7 show a modification of the inclined porous plate body. In this modified example, as shown in FIG. 6, the upper inclined perforated plate body 30 is composed of a pair of left and right upper perforated plates 31 arranged at a predetermined interval. The inclined porous plate body is formed by integrally connecting the body 30 to the lower inclined porous plate body 35 shown in FIG. 7 by a plurality of support rods (not shown).

More specifically, the upper inclined perforated plate body 30 includes a rectangular upper perforated plate 31 which is formed to be inclined downward toward the inside, and an upper side perforated at the lower end of the upper perforated plate 31. The baffle plate 32 (height: about 60 mm), the upper overflow plate 33 (height: about 30 mm) erected on the upper end of the upper porous plate 31, and the horizontal direction from the upper end of the upper porous plate 31 to the outside. The upper end surface of the upper baffle plate 32 and the upper end surface of the upper overflow plate 33 are formed at the same height. In the figure, 31a is a vapor passage hole formed in the upper porous plate 31 in large numbers.

Further, the lower inclined perforated plate body 35 is vertically installed at a pair of left and right lower perforated plates 36 which are formed to be inclined downward toward the outside, and the lower end portions of both the lower side perforated plates 36. A pair of left and right lower baffles 37 (height approximately 60 mm), a horizontal plate 38 connecting the upper end portions of both lower perforated plates 36, and a pair of left and right standing upright ends of the horizontal plate 38. And a lower overflow plate 38 (height: about 30 mm), and the upper end surface of the lower baffle plate 37 and the upper end surface of the lower overflow plate 39 are formed at the same height. . When such a modified example is used, the tower body 1 is formed in a substantially rectangular cross section. In the figure, 36a is a vapor passage hole formed in the lower porous plate 36 in a large number.

FIG. 8 shows still another embodiment of the present invention. In this embodiment, the inclined perforated plate member 40 shown in FIG. 9 is arranged in multiple stages in an inclined manner in the tower body 1 having a substantially rectangular cross section. The inclined perforated plate body 40 includes a perforated plate 41 formed in a downward slope from one side to the other side, and a baffle plate 42 vertically installed at the lower end of the perforated plate 41 (height: about 60 mm). ), An overflow plate 43 (height approximately 30 mm) provided upright on the upper end of the perforated plate 41, and a flange portion 44 that horizontally extends outward from the upper end of the perforated plate 31. The upper end surface of the baffle plate 42 and the upper end surface of the overflow plate 43 are formed at the same height. In addition, such inclined perforated plate members 40 are mounted in multiple stages within the tower body 1 (the inclined perforated plate members 40 are attached to the tower body 1 by attaching the inclined perforated plate members 40 to the inner peripheral surface of the tower body 1 and the outer peripheral surface of the collar portion 44). (The welding is performed by welding), so that the lower end surface of the baffle plate 42 of the upper inclined porous plate body 40 is lower than the upper end surface of the overflow plate 43 of the lower inclined porous plate body 40. ing. In the figure, reference numeral 41a designates a large number of holes for vapor passage, which are formed in the perforated plate 41.

According to each of the above embodiments, the upper end surfaces of the baffle plates 6, 11, 32, 37, 42 and the upper end surfaces of the overflow plates 7, 13, 33, 39, 43 have the same height. However, the upper end surface of the baffle plates 6, 11, 32, 37, 42 is higher than the upper end surfaces of the overflow plates 7, 13, 33, 39, 43. It may be lower or lower.

[0020]

[Effect of device]

 As described above, in the column-column gas-liquid contactor of the present invention, a baffle plate is erected at the end of each perforated plate that is inclinedly arranged in multiple stages in the tower, and the perforated plate flows down by this baffle plate. The liquid is blocked and then overflowed from the baffle. Therefore, even if the amount of liquid introduced into the tower is small or the velocity of the liquid flowing down the perforated plate is high, the liquid is blocked by the baffle plate on each perforated plate and the liquid is blocked near the baffle plate. Of the liquid phase becomes thicker than the thin liquid phase in the conventional example. Therefore, the liquid mainly falls from the perforated plate portion (thick portion of liquid phase) near the baffle plate, and almost all the liquid from the perforated plate portion (thick portion of liquid phase) away from the baffle plate. It does not fall and the liquid phase always exists in this part. As a result, the gas for gas-liquid contact always passes through the pores of the perforated plate in the thin portion of the liquid phase and comes into contact with the liquid, and sufficient gas-liquid contact can be performed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an essential part showing a column-column gas-liquid contactor of the present invention.

FIG. 2 is a perspective view of an upper inclined porous plate body.

FIG. 3 is a perspective view of a lower inclined porous plate body.

FIG. 4 is an explanatory diagram of an inclined porous plate body.

FIG. 5 is an explanatory diagram of a distillation apparatus.

FIG. 6 is a perspective view showing a modified example of the upper inclined porous plate body.

FIG. 7 is a perspective view showing a modified example of the lower inclined porous plate body.

FIG. 8 is a sectional view showing a main part of another embodiment of the present invention.

FIG. 9 is a perspective view of an inclined porous plate body used in the other embodiment.

FIG. 10 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

 1 Tower Main Body 2 Inclined Perforated Plate 3 Upper Inclined Perforated Plate 4 Lower Inclined Perforated Plate 5 Upper Perforated Plate 5a Hole 6 Upper Baffle Plate 7 Upper Overflow Plate 9 Upper Liquid Receptor 10 Lower Perforated Plate 10a Hole 11 Lower Side baffle 13 Lower overflow plate 14 Lower liquid receiving part

Claims (1)

[Scope of utility model registration request] 1. A hole 5a for passing a gas is provided on its own plate surface.
A plurality of perforated plates 5 for gas-liquid contact having a large number of holes 10a
10 are arranged in multiple slopes in the tower, and the perforated plates 5, 10
Of the perforated plates 5 and 10 which are vertically stacked in a state in which their inclination directions are alternately reversed and which are positioned below and below the perforated plate 5 located above. The liquid receiving portions 9 and 14 are interposed between the upper portion of the porous plate 10 and
A baffle plate 6 for blocking the liquid is provided at the end of each of the perforated plates 5, 10.
11. A column-column gas-liquid system characterized in that 11 is provided upright, the liquid A flowing down the perforated plates 5 and 10 is blocked by the baffles 6 and 11, and then overflowed from the baffles 6 and 11. Contact device.