CN216703414U - Caprolactam recovery unit for caprolactam refining plant - Google Patents
Caprolactam recovery unit for caprolactam refining plant Download PDFInfo
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- CN216703414U CN216703414U CN202220201803.3U CN202220201803U CN216703414U CN 216703414 U CN216703414 U CN 216703414U CN 202220201803 U CN202220201803 U CN 202220201803U CN 216703414 U CN216703414 U CN 216703414U
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- caprolactam
- separation tank
- partition plate
- tank
- separation
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Abstract
The utility model discloses a caprolactam recovery device for a caprolactam refining device, which comprises a bottom plate, wherein a separation tank is arranged on one side of the upper end surface of the bottom plate, an extraction tank is arranged on the other side of the upper end surface of the bottom plate, a partition plate is arranged in the middle of the separation tank, and a cavity in the separation tank, which is positioned above the upper end of the partition plate, is internally provided with a cooling assembly for cooling; a connecting component is arranged between the cavity above the partition plate and the cavity below the partition plate; a feed inlet communicated with the interior of the separation tank is formed in one side of the upper end face of the separation tank, a motor is mounted in the middle of the upper end face of the separation tank, the output end of the motor is fixedly connected with a central shaft, and the central shaft is rotatably connected with the partition plate; the device has a relatively simple structure, and caprolactam is convenient to recover without using a plurality of devices to cooperate with each other, so that the recovery difficulty of caprolactam is reduced.
Description
Technical Field
The utility model relates to the technical field of caprolactam production, in particular to a caprolactam recovery device for a caprolactam refining device.
Background
The molecular formula of caprolactam is C6H11NO, and the caprolactam is white powder or crystal in appearance and has oily hand feeling. The caprolactam refining plant will produce a large amount of benzene raffinate after production, mainly comprising caprolactam, benzene and impurities, wherein the caprolactam content is about 70%. The prior treatment mode of the benzene distillation residual liquid is to send the benzene into a condensate stripping tower to recycle the benzene, caprolactam and other impurities and waste water enter a waste liquid concentration unit together, and the caprolactam and the waste water are sent to a waste liquid incineration device to be incinerated after evaporation concentration.
In the existing treatment equipment, the equipment is large in volume and complex in mechanism, a plurality of pieces of equipment are required to be matched simultaneously to treat the distillation residual liquid, a large amount of caprolactam is wasted during treatment, and the caprolactam recovery rate is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a caprolactam recovery device for a caprolactam refining device, which aims to solve the problems in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme:
a caprolactam recovery unit for a caprolactam refining plant comprises a bottom plate, wherein a separation tank is arranged on one side of the upper end surface of the bottom plate, an extraction tank is arranged on the other side of the upper end surface of the bottom plate, a partition plate is arranged in the middle of the separation tank, and a cooling assembly for cooling is arranged in a cavity in the separation tank, which is positioned above the upper end of the partition plate;
a connecting component is arranged between the cavity above the partition plate and the cavity below the partition plate;
a feed inlet communicated with the interior of the separation tank is formed in one side of the upper end face of the separation tank, a motor is mounted in the middle of the upper end face of the separation tank, the output end of the motor is fixedly connected with a central shaft, and the central shaft is rotatably connected with the partition plate;
a separation assembly for solid-liquid separation is arranged at the position of the separation tank below the partition plate;
and the lower end of one side of the separation tank is also provided with a conveying assembly for conveying liquid to the extraction tank.
As a further scheme of the utility model: cooling unit includes the spiral pipe, the spiral pipe is installed in the cavity that the knockout drum is located the baffle top, two ports of spiral pipe all establish at knockout drum one side position, and the port department all is equipped with the connector, the center pin is located the inside position of spiral pipe and still installs at least three stirring plectrum.
As a still further scheme of the utility model: the connecting assembly comprises through holes, the two through holes are respectively arranged at the positions of the separating tank above and below the partition plate, a communication bent pipe is connected between the two through holes, and a control valve used for controlling the on-off of the communication bent pipe is arranged on the communication bent pipe.
As a still further scheme of the utility model: the separation assembly comprises a flow guide cover, the flow guide cover is fixedly connected to the position, located below the partition plate, inside the separation tank, of the separation tank, a conical pipe is fixedly connected to a lower port of the flow guide cover, a plurality of filtering holes are formed in the conical pipe, a conical spiral deflector rod is arranged at the position, located inside the conical pipe, of the central shaft, and the lower port of the conical pipe penetrates through the lower end face of the separation tank.
As a still further scheme of the utility model: the conveying assembly comprises a conveying pump, the conveying pump is installed at a position, close to the lower end of one side of the extraction tank, of the separation tank, the input end of the conveying pump is connected with an input pipe, one end, far away from the conveying pump, of the input pipe is communicated with the bottom of the separation tank, the output end of the conveying pump is connected with an output pipe, and the output end of the output pipe is communicated with a feed inlet of the extraction tank.
As a still further scheme of the utility model: and the feed inlet is provided with a turnover sealing cover.
As a still further scheme of the utility model: the upper end face of the partition plate and the lower end face of the inner part of the separation tank are inclined planes.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model can cool the benzene distillation residual liquid through the arranged cooling component, crystallize caprolactam in the benzene distillation residual liquid, further obtain benzene solution containing caprolactam crystals, after cooling, the solution is carried into a cavity below the partition board through the communicated bent pipe to carry out solid-liquid separation, separate the caprolactam crystals from the benzene solution, discharge the caprolactam crystals from the bottom of the tapered pipe after separation, and the benzene mother liquor is pumped into the extraction tank by a conveying pump to carry out water extraction, further obtain crude benzene and caprolactam water solution, further finish the recovery of caprolactam.
Drawings
FIG. 1 is a schematic structural view of a caprolactam recovery unit for a caprolactam refining apparatus.
FIG. 2 is a schematic diagram showing the internal structure of a caprolactam recovering apparatus for a caprolactam refining apparatus.
FIG. 3 is a schematic view showing the structure of a spiral pipe in a caprolactam recovery apparatus for a caprolactam refining apparatus.
Wherein: 1. a separation tank; 2. a tapered tube; 3. a central shaft; 4. a partition plate; 5. a feed inlet; 6. a motor; 7. stirring the plectrum; 8. a connector; 9. a spiral tube; 10. a through hole; 11. a control valve; 12. a communication elbow; 13. a pod; 14. a conical spiral deflector rod; 15. a filtration pore; 16. an input tube; 17. a delivery pump; 18. a base plate; 19. an output pipe; 20. an extraction tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-3, in an embodiment of the present invention, a caprolactam recovery apparatus for a caprolactam refining apparatus includes a bottom plate 18, a separation tank 1 is disposed on one side of an upper end surface of the bottom plate 18, an extraction tank 20 is disposed on the other side of the upper end surface of the bottom plate 18, a partition plate 4 is disposed in a middle position of the separation tank 1, and a cooling assembly for cooling is disposed in a cavity inside the separation tank 1 and located above the partition plate 4; the cooling component can cool the benzene distillation residual liquid to crystallize caprolactam in the benzene distillation residual liquid, and then benzene solution containing caprolactam crystals can be obtained.
The cooling assembly comprises a spiral pipe 9, the spiral pipe 9 is installed in a cavity of the separation tank 1 above the partition plate 4, two ports of the spiral pipe 9 are arranged at one side of the separation tank 1, connectors 8 are arranged at the ports, and at least three stirring pieces 7 are further installed at the position, located inside the spiral pipe 9, of the central shaft 3; the central shaft 3 and the stirring shifting sheet 7 are driven to rotate by the motor 6, so that the benzene distillation residual liquid is fully contacted with the spiral pipe 9, and the cooling is accelerated.
A connecting component is arranged between the cavity above the partition plate 4 and the cavity below the partition plate 4; coupling assembling includes through-hole 10, and two through-holes 10 are seted up respectively at the position that knockout drum 1 is located 4 tops of baffle and 4 below of baffle, are connected with intercommunication return bend 12 between two through-holes 10, are equipped with the control valve 11 that is used for controlling the break-make of intercommunication return bend 12 on the intercommunication return bend 12, through opening control valve 11 when using, make solution get into the cavity of baffle 4 below.
A feed inlet 5 communicated with the interior of the separation tank 1 is formed in one side of the upper end face of the separation tank 1, a motor 6 is installed in the middle of the upper end face of the separation tank 1, a central shaft 3 is fixedly connected to the output end of the motor 6, and the central shaft 3 is rotatably connected with a partition plate 4; the upper end face of the partition plate 4 and the lower end face inside the separation tank 1 are inclined planes. The inclined plane is arranged, so that the liquid can be conveniently circulated, and the liquid can be more conveniently discharged.
A separation component for solid-liquid separation is arranged at the position of the separation tank 1 below the partition plate 4; the separation assembly comprises a flow guide cover 13, the flow guide cover 13 is fixedly connected to the position, below the partition plate 4, in the separation tank 1, a lower port of the flow guide cover 13 is fixedly connected with a conical pipe 2, a plurality of filter holes 15 are formed in the conical pipe 2, a conical spiral deflector rod 14 is arranged at the position, in which the central shaft 3 is located, in the conical pipe 2, and the lower port of the conical pipe 2 penetrates through the lower end face of the separation tank 1; solid-liquid separation is carried out through the rotation of the conical spiral deflector rod 14, a liquid phase flows out from the filter hole 15 during separation, a solid phase is extruded and separated from the liquid phase under the action of the conical spiral deflector rod 14, separated caprolactam crystals are discharged from the bottom of the conical pipe 2, and when the conical spiral deflector rod 14 pushes the solid phase to move, the space between the spiral deflector pieces is gradually reduced, so that the extrusion of the solid phase can be realized.
The lower end of one side of the separation tank 1 is also provided with a conveying component for conveying liquid to the extraction tank 20; the conveying assembly comprises a conveying pump 17, the conveying pump 17 is installed at the position, close to the lower end of one side of the extraction tank 20, of the separation tank 1, the input end of the conveying pump 17 is connected with an input pipe 16, one end, far away from the conveying pump 17, of the input pipe 16 is communicated with the bottom of the separation tank 1, the output end of the conveying pump 17 is connected with an output pipe 19, and the output end of the output pipe 19 is communicated with a feed inlet of the extraction tank 20; when in use, the benzene mother liquor is pumped into the extraction tank 20 by the delivery pump 17 for water extraction, so that crude benzene and caprolactam water solution can be obtained, and the recovery of caprolactam is completed.
Example 2
The difference from example 1 is: the feed inlet 5 is provided with a turnover sealing cover; according to the utility model, the feed inlet 5 can be sealed when the device is not in use through the sealing cover arranged on the feed inlet 5, so that impurities are prevented from entering the separation tank 1.
The working principle of the utility model is as follows: when the utility model is used, benzene distillation residual liquid is introduced into the separating tank 1 from the feed inlet 5, then the connector 8 is connected with the external circulating water pipe, cooling the benzene distillation residual liquid, simultaneously driving the central shaft 3 and the stirring plectrum 7 to rotate by the motor 6 to ensure that the benzene distillation residual liquid is fully contacted with the spiral pipe 9, accelerating the cooling, obtaining a benzene solution containing caprolactam crystals after the cooling is finished, then the control valve 11 is opened to enable the solution to enter the cavity below the partition plate 4, then the conical spiral deflector rod 14 rotates to carry out solid-liquid separation, a liquid phase flows out from the filter hole 15 during separation, a solid phase is extruded and separated from the liquid phase under the action of the conical spiral deflector rod 14, caprolactam crystals are discharged from the bottom of the conical pipe 2 after separation, benzene mother liquor is pumped into the extraction tank 20 by the delivery pump 17 to carry out water extraction, and then crude benzene and caprolactam water solution can be obtained, thereby completing the recovery of caprolactam.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. Although the present description is described in terms of embodiments, not every embodiment includes only one technical solution, and such description of the embodiments is merely for clarity, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims (7)
1. The utility model provides a caprolactam recovery unit for caprolactam refining plant, includes bottom plate (18), bottom plate (18) up end one side is equipped with knockout drum (1), bottom plate (18) up end opposite side is equipped with extraction jar (20), its characterized in that: a partition plate (4) is arranged in the middle of the separation tank (1), and a cooling assembly for cooling is arranged in a cavity in the separation tank (1) and above the partition plate (4);
a connecting component is arranged between the cavity above the partition plate (4) and the cavity below the partition plate (4);
a feed inlet (5) communicated with the interior of the separation tank (1) is formed in one side of the upper end face of the separation tank (1), a motor (6) is installed in the middle of the upper end face of the separation tank (1), a central shaft (3) is fixedly connected to the output end of the motor (6), and the central shaft (3) is rotatably connected with a partition plate (4);
a separation assembly for solid-liquid separation is arranged at the position of the separation tank (1) below the partition plate (4);
the lower end of one side of the separation tank (1) is also provided with a conveying component for conveying liquid to the extraction tank (20).
2. Caprolactam recovery unit for a caprolactam refining plant according to claim 1, characterized in that the cooling package comprises a spiral tube (9), the spiral tube (9) is installed in a cavity above the partition plate (4) in the knockout drum (1), two ports of the spiral tube (9) are both arranged at a side position of the knockout drum (1), and the ports are both provided with a connector (8), and at least three stirring paddles (7) are further installed at a position where the central shaft (3) is located inside the spiral tube (9).
3. The caprolactam recovery device for a caprolactam refining apparatus according to claim 1, wherein the connecting assembly comprises through holes (10), the two through holes (10) are respectively formed in the separating tank (1) above the partition plate (4) and below the partition plate (4), a communication elbow (12) is connected between the two through holes (10), and a control valve (11) for controlling the on-off of the communication elbow (12) is arranged on the communication elbow (12).
4. The caprolactam recovery unit for a caprolactam refining plant according to claim 1, characterized in that the separation assembly comprises a draft shield (13), the draft shield (13) is fixedly connected to the inside of the separation tank (1) at a position below the partition plate (4), a lower port of the draft shield (13) is fixedly connected with a conical tube (2), the conical tube (2) is provided with a plurality of filtering holes (15), the central shaft (3) is provided with a conical spiral deflector rod (14) at a position inside the conical tube (2), and the lower port of the conical tube (2) passes through the lower end surface of the separation tank (1).
5. The caprolactam recovery unit for a caprolactam refining plant according to claim 1, characterized in that the conveying component comprises a conveying pump (17), the conveying pump (17) is installed at a position of the lower end of one side of the separation tank (1) close to the extraction tank (20), an input end of the conveying pump (17) is connected with an input pipe (16), one end of the input pipe (16) far away from the conveying pump (17) is communicated with the bottom of the separation tank (1), an output end of the conveying pump (17) is connected with an output pipe (19), and an output end of the output pipe (19) is communicated with a feed inlet of the extraction tank (20).
6. Caprolactam recovery apparatus for a caprolactam refining apparatus according to claim 1, wherein the feed port (5) is provided with a reversible cover.
7. The caprolactam recovery apparatus for a caprolactam refining apparatus according to claim 1, wherein the upper end surface of the partition plate (4) and the inner lower end surface of the separation tank (1) are inclined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220201803.3U CN216703414U (en) | 2022-01-25 | 2022-01-25 | Caprolactam recovery unit for caprolactam refining plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220201803.3U CN216703414U (en) | 2022-01-25 | 2022-01-25 | Caprolactam recovery unit for caprolactam refining plant |
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| Publication Number | Publication Date |
|---|---|
| CN216703414U true CN216703414U (en) | 2022-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220201803.3U Active CN216703414U (en) | 2022-01-25 | 2022-01-25 | Caprolactam recovery unit for caprolactam refining plant |
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|---|---|
| CN (1) | CN216703414U (en) |
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2022
- 2022-01-25 CN CN202220201803.3U patent/CN216703414U/en active Active
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