CN218653051U - Succinct efficient butyl octanol raffinate recovery unit - Google Patents
Succinct efficient butyl octanol raffinate recovery unit Download PDFInfo
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- CN218653051U CN218653051U CN202222679054.8U CN202222679054U CN218653051U CN 218653051 U CN218653051 U CN 218653051U CN 202222679054 U CN202222679054 U CN 202222679054U CN 218653051 U CN218653051 U CN 218653051U
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- atmospheric distillation
- distillation tower
- butyraldehyde
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- octanol
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Abstract
The utility model relates to a chemical production field, in particular to succinct efficient butyl octanol raffinate recovery unit, the utility model provides a succinct efficient butyl octanol raffinate recovery unit, include: atmospheric distillation tower, atmospheric distillation tower still includes: the packing is arranged inside the atmospheric distillation tower, and three sections of the packing are arranged in the atmospheric distillation tower from top to bottom; the butyraldehyde buffer tank is arranged on the left side of the atmospheric distillation tower; the reflux tank is arranged between the normal-pressure rectifying tower and the butyraldehyde buffer tank; and the reboiler is arranged at the lower end of the normal pressure rectifying tower. The problems that the concentration of the separated recovered butyraldehyde does not reach the standard and the process flow is complex and fussy due to the fact that the butyraldehyde, water, butanol and other components in the residual liquid form an azeotrope with a lower boiling point in a certain proportion are solved, the complex components in the butanol-octanol residual liquid are simply and efficiently separated from one another, the process flow is reduced, and the purity of each component obtained by recovery is improved.
Description
Technical Field
The application relates to the field of chemical production, in particular to a succinct efficient butyl octanol raffinate recovery unit.
Background
The butanol-octanol device of a chemical enterprise can generate partial residual liquid in daily operation, and the partial residual liquid comprises butyraldehyde, water, butanol, C5C7, octenal, octanol and heavy components. The residual liquid from the hydrogenation and rectification sections still contains the components such as butyraldehyde, butanol, octenal, octanol and the like which are worthy of recycling, and if the components are not separated and directly sold as waste liquid fuel, the utilization value of the components as midstream products can be wasted.
At present, some residual liquid recovery devices utilize rectification and vacuum rectification technologies to connect a plurality of rectification towers in series so as to separate and recover butyraldehyde, butanol, octenal and octanol from the tower top respectively. But because the butyraldehyde, water, butanol and other components in the residual liquid can form azeotrope with lower boiling point in a certain proportion, the concentration of the recovered butyraldehyde separated by the method does not reach the standard, and the recovered butyraldehyde is often used as waste liquid fuel for treatment; moreover, the investment cost and the occupied area of the device are increased due to a plurality of rectifying towers, and the process flow is complicated and fussy.
Therefore, a simple and efficient butanol and octanol residual liquid recovery device is needed to solve the problems that components such as butyraldehyde, water and butanol in the residual liquid can form an azeotrope with a lower boiling point in a certain proportion, so that the concentration of the separated recovered butyraldehyde does not reach the standard, and the process flow is complex and tedious.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a succinct efficient butyl octanol raffinate recovery unit, solve components such as butyraldehyde, water and butanol in the raffinate and can form the azeotrope that the boiling point is lower with certain proportion, cause the recovery butyraldehyde concentration of isolating not up to standard, the complicated loaded down with trivial details problem of process flow.
In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions: the utility model provides a succinct efficient butyl octanol raffinate recovery unit, includes: atmospheric distillation tower, atmospheric distillation tower still includes: the packing is arranged inside the atmospheric distillation tower, and three sections of the packing are arranged in the atmospheric distillation tower from top to bottom; the butyraldehyde buffer tank is arranged on the left side of the atmospheric distillation tower; the reflux tank is arranged between the normal-pressure rectifying tower and the butyraldehyde buffer tank; and the reboiler is arranged at the lower end of the normal pressure rectifying tower.
Further, according to the embodiment of the application, the method further comprises the following steps: the side-draw device is arranged on one side of the atmospheric distillation tower and consists of a discharge pump, a heat exchanger, a discharge valve and a reflux valve, and the side-draw device is connected to a liquid collecting box at the lower end of the filler.
Further, according to the embodiment of the application, the method further comprises the following steps:
the first discharging pump is connected to the lower end of the first section of the filler;
the first heat exchanger is connected to the right end of the first discharging pump;
the first discharge valve is connected to the right end of the first heat exchanger;
the first reflux valve is arranged below the first discharging pump and connected to the atmospheric distillation tower.
Further, according to the embodiment of the application, the method further comprises the following steps:
the second discharging pump is connected to the lower end of the second section of the filler;
the second heat exchanger is connected to the right end of the second discharging pump;
and the second discharge valve is connected to the right end of the second heat exchanger.
Further, according to the embodiment of the application, the method further comprises the following steps:
the third discharge pump is connected to the lower end of the third section of the filler;
the third heat exchanger is connected to the right end of the third discharging pump;
the third discharge valve is connected to the right end of the third heat exchanger;
and the second reflux valve is arranged above the third heat exchanger and is connected to the atmospheric distillation tower.
Further, according to this application embodiment, wherein, the lower extreme of backward flow jar is provided with the fourth bleeder pump, and the fourth bleeder valve is connected to the right-hand member of fourth bleeder pump, and the upper end at butyraldehyde buffer tank is connected to the fourth bleeder valve.
Further, according to this application embodiment, wherein, the upper end of reflux drum is provided with the condenser, and the atmospheric distillation tower and reflux drum are connected to the condenser.
Further, according to this application embodiment, wherein, butyraldehyde buffer tank's lower extreme is provided with the charge pump, and the left end of charge pump is provided with the third return valve, and the third return valve is connected in the upper end of ordinary pressure rectifying column.
Further, according to the embodiment of the application, wherein the right end of the reboiler is provided with a steam regulating valve, and the steam regulating valve is connected to the upper end of the reboiler.
Further, according to the embodiment of the application, wherein the bottom end of the atmospheric distillation tower is provided with a tower kettle, and the tower kettle is connected with the reboiler.
In order to achieve the above purpose, the embodiment of the present application further discloses a simple and efficient butanol and octanol residual liquid recovery method, which includes the following steps:
azeotropic distillation, namely transporting the butanol-octanol residual liquid to an atmospheric distillation tower, adding an azeotropic agent butyraldehyde to the outside of the atmospheric distillation tower to ensure that the butyraldehyde and water are easier to separate from the butanol through distillation, forming a minimum azeotrope of the butyraldehyde and the water according to a certain ratio under the pressure of the tower top, evaporating the butyraldehyde and the water from the tower top, condensing the butyraldehyde by a condenser at the tower top, then entering a reflux tank for layering, separating the butyraldehyde in the components, then entering a butyraldehyde buffer tank for storage, and using the butyraldehyde buffer tank as a circulating azeotropic agent;
separating, namely adding a lateral extraction device on the side surface of a liquid collecting box below the first, second and third sections of fillers through heat and mass transfer among the plurality of sections of fillers, respectively extracting and recovering butanol, C5-C7, and octenal and octanol, and discharging heavy components in residual liquid from a tower kettle.
Compared with the prior art, the method has the following beneficial effects:
this application adopts a succinct efficient butyl octanol raffinate recovery unit, through adopting azeotropic distillation and side draw method, has solved butyraldehyde, water and butanol in the raffinate and can form the azeotrope that the boiling point is lower with certain proportion, causes the recovery butyraldehyde concentration of separating not up to standard, the complicated loaded down with trivial details problem of process flow, reached the simple and efficient mutual separation of complicated component in the butyl octanol raffinate, reduced process flow, improved the effect of retrieving the purity of each component of gained.
Drawings
The present application is further described below with reference to the drawings and examples.
FIG. 1 is a schematic structural diagram of a simple and efficient butanol and octanol raffinate recovery device.
In the attached drawings
1. Atmospheric distillation tower 2, reflux tank 3 and butyraldehyde buffer tank
4. Reboiler 5, side draw device 51, first discharge pump
52. First heat exchanger 53, first bleeder valve 54, first reflux valve
55. A second discharge pump 56, a second heat exchanger 57 and a second discharge valve
58. A third discharging pump 59, a third heat exchanger 510 and a third discharging valve
511. A second reflux valve 6, a fourth discharge pump 7 and a fourth discharge valve
8. A feed pump 9, a third reflux valve 10 and a steam regulating valve
11. Tower bottom 12, condenser 13 and filler
Detailed Description
In order to make the objects and technical solutions of the present invention clear and fully described, and the advantages thereof more clearly understood, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some, but not all, embodiments of the present invention and are not to be considered as limiting, and that all other embodiments can be made by one of ordinary skill in the art without any inventive work.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art that the embodiments may be practiced without these specific details. In some instances, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, all embodiments may be used in combination with each other.
The first embodiment is as follows:
as shown in fig. 1, the application discloses a succinct efficient butyl octanol raffinate recovery unit includes: atmospheric distillation tower 1, atmospheric distillation tower 1 still includes: the packing 13 is arranged inside the atmospheric distillation tower 1, and three sections of the packing 13 are arranged in the atmospheric distillation tower 1 from top to bottom; a butyraldehyde buffer tank 3, wherein the butyraldehyde buffer tank 3 is arranged on the left side of the atmospheric distillation tower 1; the reflux tank 2 is arranged between the atmospheric distillation tower 1 and the butyraldehyde buffer tank 3; the reboiler 4 is arranged at the lower end of the atmospheric distillation tower 1. The side draw device 5 is arranged on one side of the atmospheric distillation tower 1, the side draw device 5 is composed of a centrifugal pump, a heat exchanger and a reflux valve, and the side draw device 5 is connected to a liquid collecting box at the lower end of the filler 13. The first discharging pump 51 is connected to the lower end of the first section of the filler; the first heat exchanger 52 is connected to the right end of the first discharging pump 51; a first discharge valve 53, wherein the first discharge valve 53 is connected to the right end of the first heat exchanger 52; and a first reflux valve 54, wherein the first reflux valve 54 is arranged below the first discharging pump 51, and the first reflux valve 54 is connected to the atmospheric distillation tower 1. The second discharging pump 55 is connected to the lower end of the second section of the filler, and the second discharging pump 55 is connected to the lower end of the second section of the filler; a second heat exchanger 56, wherein the second heat exchanger 56 is connected to the right end of the second discharging pump 55; and the second discharge valve 57 is connected to the right end of the second heat exchanger 56. The second discharge valve 58 is connected to the lower end of the third section of filling material; a third heat exchanger 59, wherein the third heat exchanger 59 is connected to the right end of the second discharge valve 58; a third discharge valve 510, wherein the third discharge valve 510 is connected to the right end of the third heat exchanger 59; the second reflux valve 511, the second reflux valve 511 is provided above the third heat exchanger 59, and the second reflux valve 511 is connected to the atmospheric distillation column 1. The lower extreme of backward flow jar 2 is provided with fourth bleeder pump 6, and fourth bleeder valve 7 is connected to the right-hand member of fourth bleeder pump 6, and fourth bleeder valve 7 is connected in butyraldehyde buffer tank 3's upper end. The upper end of the reflux tank 2 is provided with a condenser 12, and the condenser 12 is connected with the atmospheric distillation tower 1 and the reflux tank 2. The lower extreme of butyraldehyde buffer tank 3 is provided with charge pump 8, and the left end of charge pump 8 is provided with third return valve 9, and third return valve 9 is connected in the upper end of ordinary pressure rectifying column 1. The right end of the reboiler 4 is provided with a steam regulating valve 10, and the steam regulating valve 10 is connected to the upper end of the reboiler 4. The bottom of the atmospheric distillation tower 1 is provided with a tower kettle 11, and the tower kettle 11 is connected with a reboiler 4.
To the problem that the prior art can lead to containing azeotropic system in the raffinate, the utility model discloses a method of azeotropic distillation solves. By adding the entrainer to the atmospheric distillation tower 1, the entrainer and the butyraldehyde and the water in the residual liquid form a minimum azeotrope with a boiling point lower than that of the original azeotrope, so that the relative volatility of the components is increased, and the butyraldehyde and the water can be separated from the butanol more easily through distillation.
The utility model discloses in regard as the external azeotropic agent with butyraldehyde, the middle section feeding of raffinate from ordinary pressure rectifying column 1, the top of the tower feeding of external butyraldehyde from ordinary pressure rectifying column 1. The lowest azeotrope of butyraldehyde and water is formed according to a certain proportion under the pressure of the tower top, the butyraldehyde proportion in the azeotrope is far greater than water usually, butyraldehyde and water are evaporated from the tower top, enter the reflux tank 2 to stratify after the condenser 12 set up in the tower top is condensed, the water in the component is discharged from the liquid bag under the reflux tank 2, treat as the waste water; butyraldehyde in the components enters a butyraldehyde buffer tank 3 for storage after separation, and is continuously fed to the top of the atmospheric distillation tower 1 to be used as a circulating entrainer.
The separation effect of the butyraldehyde in the reflux tank 2 is general due to standing and layering, so in order to ensure the purity of the layered butyraldehyde, the layered water inevitably contains a certain amount of butyraldehyde, which causes the loss of the entrainer circulating in the system, therefore, in addition to ensuring that a certain amount of butyraldehyde stock is contained in the butyraldehyde buffer tank 3 before starting the device, the butyraldehyde buffer tank 3 also needs to be supplemented with butyraldehyde at regular time in daily operation. In order to ensure the separation effect of azeotropic distillation, the circulation flow of the entrainer is determined by the ratio of butyraldehyde to water in the residual liquid and the pressure of the tower top, so that water with higher boiling point is separated from butanol as far as possible.
To the comparatively loaded down with trivial details problem of prior art process flow, the utility model discloses a method that the side line was taken out is solved. The original multiple atmospheric distillation towers 1 are reduced to one, the tower is designed into an atmospheric packing 13 tower containing three sections of packing 13, a side line extraction device 5 is additionally arranged on the side surface of a liquid collecting box below the first, second and third sections of packing 13 through heat and mass transfer among the sections of packing 13, butanol, C5-C7, octenal and octanol are respectively extracted and recovered, and heavy components in residual liquid are discharged from a tower kettle 11.
Be provided with the teletransmission level gauge on the liquid collecting tank on each 13 layers of packing, the operating personnel of being convenient for carries out daily observation to prevent that the material from being evacuated to find time in the liquid collecting tank, influence the effect of rectification separation. The hot reflux is additionally arranged on the lateral line for recovering the butanol and is arranged above the second section of packing 13 distributor, the cold reflux is additionally arranged on the lateral line for recovering the octenal and the octanol and is arranged above the third section of packing 13 distributor, and the purposes of controlling the concentrations of the recovered butanol, the recovered octenal and the recovered octanol can be achieved by adjusting the reflux flow and the circulation entrainer flow in daily operation, so that the components with utilization values can be effectively recovered.
When the device is in daily operation, the concentration of butanol recovered by side-line extraction is controlled by adjusting the circulation amount of the entrainer through the third reflux valve 9, and the circulation amount of the entrainer can be judged according to the gas phase temperature at the top of the tower; the concentration of C5-C7 extracted from the side line is controlled by the thermal reflux amount of the recovered butanol, and the thermal reflux amount of the butanol can be judged according to the gas phase temperature between the first section of packing 13 and the second section of packing 13; the concentration of octenal and octanol collected from a side line is controlled by recovering the cold reflux quantity of the octenal and the octanol, and the cold reflux quantity can be judged by the gas phase temperature between the second section of packing 13 and the third section of packing 13; the yield of the light components in the tower bottom 11 is controlled by the steam flow of the reboiler 4, and the steam flow can be judged by the liquid phase temperature of the tower bottom 11.
The utility model discloses utilize azeotropic distillation and side draw's method, reduced the separation degree of difficulty between the component, the form of application cold reflux, hot reflux makes product quality controllable, with the succinct high-efficient alternate segregation of the complicated component in the butyl octanol raffinate, has not only improved the purity of retrieving each component of gained, has reduced the device energy consumption moreover, effectively improves the productivity effect of this workshop section.
Example two:
the application also discloses succinct efficient butyl octanol raffinate recovery unit, including following step:
azeotropic distillation, namely transporting the butanol-octanol residual liquid to an atmospheric distillation tower 1, adding an entrainer of butyraldehyde to the atmospheric distillation tower 1 to ensure that the butyraldehyde and water are easier to separate from butanol through distillation, forming a minimum azeotrope of the butyraldehyde and the water according to a certain ratio under the pressure of the tower top, evaporating the butyraldehyde and the water from the tower top, condensing the butyraldehyde by a condenser 12 at the tower top, then entering a reflux tank 2 for layering, separating the butyraldehyde in the components, then entering a butyraldehyde buffer tank 3 for storage, and using the butyraldehyde buffer tank as a circulating entrainer;
separating, namely adding a side line extraction device 5 on the side surface of the liquid collecting tank below the first, second and third sections of the packing 13 through heat and mass transfer among the sections of the packing 13, respectively extracting and recovering butanol, C5-C7, and octenal and octanol, and discharging heavy components in residual liquid from a tower kettle 11.
Although the illustrative embodiments of the present application have been described above to enable those skilled in the art to understand the present application, the present application is not limited to the scope of the embodiments, and various modifications within the spirit and scope of the present application defined and determined by the appended claims will be apparent to those skilled in the art from this disclosure.
Claims (10)
1. The utility model provides a succinct efficient butyl octanol raffinate recovery unit which characterized in that includes:
the atmospheric distillation tower still includes:
the filler is arranged inside the atmospheric distillation tower, and three sections of the filler are arranged in the atmospheric distillation tower from top to bottom;
the butyraldehyde buffer tank is arranged on the left side of the atmospheric distillation tower;
the reflux tank is arranged between the atmospheric distillation tower and the butyraldehyde buffer tank;
and the reboiler is arranged at the lower end of the atmospheric distillation tower.
2. The concise and efficient butanol-octanol raffinate recovery device according to claim 1, further comprising:
the side-draw device is arranged on one side of the atmospheric distillation tower and consists of a discharge pump, a heat exchanger, a discharge valve and a reflux valve, and the side-draw device is connected to a liquid collecting box at the lower end of the filler.
3. The apparatus for recycling butanol and octanol residual liquid with concise and high efficiency as claimed in claim 2, further comprising:
the first discharging pump is connected to the lower end of the first section of the filler;
the first heat exchanger is connected to the right end of the first discharging pump;
the first discharge valve is connected to the right end of the first heat exchanger;
the first reflux valve is arranged below the first discharging pump and connected to the atmospheric distillation tower.
4. The concise and efficient butanol-octanol raffinate recovery device according to claim 2, further comprising:
the second discharging pump is connected to the lower end of the second section of the filler;
the second heat exchanger is connected to the right end of the second discharging pump;
and the second discharge valve is connected to the right end of the second heat exchanger.
5. The apparatus for recycling butanol and octanol residual liquid with concise and high efficiency as claimed in claim 2, further comprising:
the third discharge pump is connected to the lower end of the third section of the packing;
the third heat exchanger is connected to the right end of the third discharging pump;
the third discharge valve is connected to the right end of the third heat exchanger;
and the second reflux valve is arranged above the third heat exchanger and is connected to the atmospheric distillation tower.
6. The simple and efficient butanol and octanol residual liquid recovery device according to claim 1, wherein a fourth discharge pump is arranged at the lower end of the reflux tank, a fourth discharge valve is connected to the right end of the fourth discharge pump, and the fourth discharge valve is connected to the upper end of the butyraldehyde buffer tank.
7. The simple and efficient butanol-octanol residual liquid recovery device according to claim 1, wherein a condenser is arranged at the upper end of the reflux tank, and the condenser is connected with the atmospheric distillation tower and the reflux tank.
8. The simple and efficient butanol and octanol residual liquid recovery device according to claim 1, wherein a feed pump is arranged at the lower end of the butyraldehyde buffer tank, a third reflux valve is arranged at the left end of the feed pump, and the third reflux valve is connected to the upper end of the atmospheric distillation tower.
9. The simple and efficient butanol and octanol residual liquid recovery device according to claim 1, wherein a steam regulating valve is arranged at the right end of the reboiler, and the steam regulating valve is connected to the upper end of the reboiler.
10. The simple and efficient butanol and octanol residual liquid recovery device according to claim 1, wherein the bottom end of the atmospheric distillation tower is provided with a tower kettle, and the tower kettle is connected with the reboiler.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222679054.8U CN218653051U (en) | 2022-10-12 | 2022-10-12 | Succinct efficient butyl octanol raffinate recovery unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222679054.8U CN218653051U (en) | 2022-10-12 | 2022-10-12 | Succinct efficient butyl octanol raffinate recovery unit |
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| Publication Number | Publication Date |
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| CN218653051U true CN218653051U (en) | 2023-03-21 |
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|---|---|---|---|
| CN202222679054.8U Active CN218653051U (en) | 2022-10-12 | 2022-10-12 | Succinct efficient butyl octanol raffinate recovery unit |
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| CN (1) | CN218653051U (en) |
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- 2022-10-12 CN CN202222679054.8U patent/CN218653051U/en active Active
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