CN210751374U - NVP continuous crystallization reaction device - Google Patents
NVP continuous crystallization reaction device Download PDFInfo
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- CN210751374U CN210751374U CN201921605719.2U CN201921605719U CN210751374U CN 210751374 U CN210751374 U CN 210751374U CN 201921605719 U CN201921605719 U CN 201921605719U CN 210751374 U CN210751374 U CN 210751374U
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Abstract
The utility model belongs to the technical field of reaction devices, and discloses an NVP (nitrogen-video-protocol) continuous crystallization reaction device, which comprises a reaction kettle, wherein a heat exchange mechanism and a scraping mechanism are arranged on the reaction kettle; the heat exchange mechanism comprises a heat exchange jacket fixed on the outer wall of the reaction kettle and a heat exchange tank in the reaction kettle, and the scraping mechanism comprises a scraping rod I, a scraping rod II, a rotating shaft, a fixed seat, a bevel gear I, a bevel gear II and a rotating motor which are connected with each other; the utility model has simple structure and convenient maintenance, and the scraping mechanism and the heat exchange mechanism are mutually matched, thereby improving the crystallization efficiency and quality; the scraping mechanism improves the production efficiency, not only plays a role in stirring and mixing, but also can remove crystals attached to the inner wall surface of the reaction kettle and the outer surface of the heat exchange tank in time; the heat exchange mechanism improves the heat exchange area between the feed liquid in the reaction kettle and the heat exchange mechanism in the crystallization process, and further improves the crystallization efficiency.
Description
Technical Field
The utility model relates to a reaction unit technical field especially relates to a NVP continuous crystallization reaction unit.
Background
N-vinyl pyrrolidone (NVP) is widely applied to the fields of medicines, daily chemicals, foods and the like. In the production process, all raw materials need to be uniformly stirred and fully melted in a reaction kettle, and then qualified N-vinyl pyrrolidone serving as a monomer of a polymer is obtained through purification and crystallization; in order to uniformly mix materials and efficiently crystallize, a stirring mechanism and a heat exchange mechanism are mainly arranged in a reaction kettle, but when the N-vinyl pyrrolidone is continuously crystallized and purified in the reaction kettle, the quality of the polyvinyl pyrrolidone is seriously affected due to the limitation of the materials, the temperature and the time due to nonuniform stirring, the heat exchange area in the reaction kettle is limited, the crystallization efficiency is low, and the inner wall of the reaction kettle is easy to stick crystals, so that the production quality and the production efficiency are affected.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming current technical problem, providing a NVP continuous crystallization reaction unit.
In order to achieve the purpose, the utility model is implemented according to the following technical scheme:
a NVP continuous crystallization reaction device comprises a reaction kettle, wherein a raw material inlet, a mother liquid reflux port, a crystal outlet, a heat exchange mechanism and a scraping mechanism are arranged on the reaction kettle; the heat exchange mechanism comprises a heat exchange jacket and a heat exchange tank, the heat exchange jacket is fixed on the outer wall of the reaction kettle, a heat conducting medium inlet and a heat conducting medium outlet are arranged on the heat exchange jacket, a flow guide partition plate is arranged in the heat exchange tank, the heat exchange tank comprises a tank body and a feeding and discharging pipe fixedly connected with the top of the tank body, the tank body is positioned in the center of the reaction kettle, the top end of the feeding and discharging pipe extends out of the reaction kettle, the flow guide partition plate divides the interior of the feeding and discharging pipe into a feeding channel and a discharging channel, the feeding channel is connected with a heat conducting medium feeding pipe, and the discharging;
the scraping mechanism comprises a scraping rod I, a scraping rod II, a rotating shaft, a fixed seat, a conical gear I, a conical gear II and a rotating motor; the scraping rod I is matched with the inner wall of the reaction kettle, the scraping rod II is matched with the outer wall of the tank body, the fixing seat is fixed at the central position of the top end of the reaction kettle, a vertical channel is arranged at the center of the rotating shaft, one end of the rotating shaft extends into the reaction kettle and is connected with the scraping rod I and the scraping rod II through a connecting rod, the other end of the rotating shaft penetrates through the reaction kettle and the fixing seat and extends out of the reaction kettle and is fixedly connected with a bevel gear I, the rotating shaft is rotationally sealed with the reaction kettle (the rotating shaft and the reaction kettle are in the prior art and are not described any more), the upper end of the fixing seat is rotationally connected with the lower surface of the bevel gear I through a bearing, the fixing seat supports the bevel gear together, the rotation of the rotating shaft is not influenced, the bevel gear II;
the feeding and discharging pipe penetrates through the vertical channel, and the top end of the feeding and discharging pipe is fixedly connected with the fixed seat through the fixed part.
The utility model discloses in the cooperative relationship between each part as follows: the heat exchange jacket and the heat exchange tank are combined with each other, so that the heat exchange area of the feed liquid is not limited to the inner wall of the reaction kettle corresponding to the heat exchange jacket any more, the heat exchange jacket also comprises the outer wall of the tank body of the heat exchange tank, the heat exchange area of the feed liquid in the reaction kettle is increased, and the crystallization efficiency is improved; the material scraping mechanism and the heat exchange mechanism are matched with each other, so that the material liquid mixing and stirring effects are achieved, and crystals on the inner wall of the reaction kettle and the outer wall of the tank body can be scraped and discharged from a crystal outlet; specifically, heat-conducting medium is respectively and circularly introduced into the heat-exchanging jacket and the heat-exchanging tank through a heat-conducting medium inlet of the heat-exchanging jacket and a heat-conducting medium feeding pipe, so that feed liquid in the reaction kettle is contacted with the inner wall of the reaction kettle and the outer wall of the tank body for heat exchange, and further crystallization is carried out; the rotating motor drives the conical gear II to rotate, the conical gear drives the conical gear I to rotate, the conical gear drives the rotating shaft to rotate, the rotating shaft drives the scraping rod I and the scraping rod II to rotate, and the crystallized crystals are scraped while the feed liquid in the reaction kettle is stirred; the setting of vertical passageway has avoided heat exchange tank and scraping mechanism during operation to interfere with each other in the axis of rotation, and the fixing base plays the supporting role to heat exchange tank and scraping mechanism.
Preferably, the mounting includes hoop and dead lever, the hoop is fixed in the periphery on business turn over material pipe top, the lateral wall fixed connection of the dead lever that passes through of hoop and fixing base, this department sets up the inside of hanging at reation kettle that makes that the heat transfer jar can be stable, increases the heat transfer area of feed liquid, improves crystallization efficiency.
Preferably, the tank body is biconical, and the crystal on the surface of the heat exchange tank is more easily scraped by the scraping rod II under the condition that the contact area between the outer surface of the heat exchange tank and the feed liquid is increased, so that the accumulation and bonding of the crystal on the surface of the heat exchange tank are avoided.
The utility model discloses in still including other subassemblies that can make the device normal use, it all belongs to the conventional selection in this field, control assembly, the control assembly that makes the interior mother liquor of reation kettle pass through mother liquor backward flow mouth circulation flow etc. of heat-conducting medium circulation flow in control heat transfer jacket and the heat transfer jar. In addition, the device or the component which is not limited in the utility model adopts the conventional means in the field, for example, the fixing seat, the flow guide clapboard, the first conical gear, the second conical gear, the first scraping rod, the second scraping rod and the like all adopt the conventional structure.
The utility model discloses a theory of operation: the heat exchange jacket and the heat exchange tank are combined with each other, so that the heat exchange area of the feed liquid is not limited to the inner wall of the reaction kettle corresponding to the heat exchange jacket any more, the heat exchange jacket also comprises the outer wall of the tank body of the heat exchange tank, the heat exchange area of the feed liquid in the reaction kettle is increased, and the crystallization efficiency is improved; the material scraping mechanism and the heat exchange mechanism are matched with each other, so that the material liquid mixing and stirring effects are achieved, and crystals on the inner wall of the reaction kettle and the outer wall of the tank body can be scraped and discharged from a crystal outlet; specifically, heat-conducting medium is respectively and circularly introduced into the heat-exchanging jacket and the heat-exchanging tank through a heat-conducting medium inlet of the heat-exchanging jacket and a heat-conducting medium feeding pipe, so that feed liquid in the reaction kettle is contacted with the inner wall of the reaction kettle and the outer wall of the tank body for heat exchange, and further crystallization is carried out; the rotating motor drives the conical gear II to rotate, the conical gear II drives the conical gear I to rotate, the conical gear drives the rotating shaft to rotate, the rotating shaft drives the scraping rod I and the scraping rod II to rotate, the positions of the scraping rod II and the scraping rod I increase the stirring range of the material liquid in the reaction kettle, and the material liquid in the reaction kettle is fully stirred and the crystallized crystals are scraped; the arrangement of the vertical channel on the rotating shaft avoids the mutual interference between the heat exchange tank and the scraping mechanism during working.
The utility model discloses following beneficial effect has been reached: the structure is simple, the maintenance is convenient, the scraping mechanism and the heat exchange mechanism are mutually matched, and the crystallization efficiency and the crystallization quality are improved; the scraping mechanism improves the production efficiency, not only plays a role in stirring and mixing, but also can remove crystals attached to the inner wall surface of the reaction kettle and the outer surface of the heat exchange tank in time; the heat exchange mechanism improves the heat exchange area between the feed liquid in the reaction kettle and the heat exchange mechanism in the crystallization process, and further improves the crystallization efficiency.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a top view of the fixture of fig. 1.
In the figure: 1. a reaction kettle; 2. a heat exchange jacket; 3. a tank body; 4. a first conical gear; 5. a fixed seat; 6. a rotating shaft; 7. a first scraping rod; 8. a second scraping rod; 9. a heat-conducting medium feeding pipe; 10. a heat-conducting medium discharge pipe; 11. a flow guide clapboard; 12. rotating the motor; 13. a second bevel gear; 14. a mother liquor reflux port; 15. a crystal outlet; 16. a raw material inlet; 17. fixing the rod; 18. feeding and discharging pipes; 19. a connecting rod; 20. and (4) a hoop.
Detailed Description
The invention will be further described with reference to the drawings and specific embodiments, illustrative embodiments and description of which are provided herein to explain the invention, but not as a limitation thereof.
Example (b):
the NVP continuous crystallization reaction device shown in the figure 1-2 comprises a reaction kettle 1, wherein the reaction kettle 1 is provided with a raw material inlet 16, a mother liquid reflux port 14, a crystal outlet 15, a heat exchange mechanism and a scraping mechanism; the heat exchange mechanism comprises a heat exchange jacket 2 and a heat exchange tank, the heat exchange jacket 2 is fixed on the outer wall of the reaction kettle 1, a heat conducting medium inlet and a heat conducting medium outlet are arranged on the heat exchange jacket 2, a flow guide partition plate 11 is arranged in the heat exchange tank, the heat exchange tank comprises a tank body 3 and a feeding and discharging pipe 18 fixedly connected with the top of the tank body 3, the tank body 3 is positioned in the center position of the reaction kettle 1, the top end of the feeding and discharging pipe 18 extends out of the reaction kettle 1, the flow guide partition plate 11 divides the interior of the feeding and discharging pipe 18 into a feeding channel and a discharging channel, the feeding channel is connected with a heat conducting medium feeding pipe 9, and the discharging;
the scraping mechanism comprises a first scraping rod 7, a second scraping rod 8, a rotating shaft 6, a fixed seat 5, a first conical gear 4, a second conical gear 13 and a rotating motor 12; the first scraping rod 7 is matched with the inner wall of the reaction kettle 1, the second scraping rod 8 is matched with the outer wall of the tank body 3, the fixed seat 5 is fixed at the central position of the top end of the reaction kettle 1, a vertical channel is arranged at the center of the rotating shaft 6, one end of the rotating shaft 6 extends into the reaction kettle 1 and is connected with the first scraping rod 7 and the second scraping rod 8 through the connecting rod 19, the other end of the rotating shaft 6 extends out of the reaction kettle 1 after penetrating through the reaction kettle 1 and the fixed seat 5 and is fixedly connected with the first bevel gear 4, the rotating shaft 6 is in rotary seal with the reaction kettle 1 (the prior art is omitted for further description), the upper end of the fixed seat 5 is rotatably connected with the lower surface of the first bevel gear 4 through a bearing, the fixed seat 5 plays a supporting role for the first bevel gear 4 and does not influence the rotation of the rotating shaft 6, the second bevel gear 13 is meshed with the first bevel gear 4, and the second bevel gear 13 is connected with an output shaft of the rotating motor 12;
the feeding and discharging pipe 18 penetrates through the vertical channel, and the top end of the feeding and discharging pipe 18 is fixedly connected with the fixed seat 5 through a fixing piece.
The mounting includes hoop 20 and dead lever 17, hoop 20 is fixed in the periphery on business turn over material pipe 18 top, and hoop 20's the lateral wall fixed connection who passes through dead lever 17 and fixing base 5, this department sets up the inside of hanging at reation kettle 1 that makes that the heat transfer jar can be stable, increases the heat transfer area of feed liquid, improves crystallization efficiency.
The tank body 3 is in a double-cone shape, and the crystallization on the surface of the heat exchange tank is easier to scrape by the scraping rod II 8 under the condition that the contact area between the outer surface of the heat exchange tank and the feed liquid is increased, so that the accumulation and bonding of crystals on the surface of the heat exchange tank are avoided.
When the device is used, the mother liquid reflux port 14 and the crystal outlet 15 are closed, the raw material inlet 16 is opened, the rotating motor 12 is started after materials are introduced into the reaction kettle 1, the conical gear II 13 is driven to rotate, the conical gear II 13 drives the conical gear I4 to rotate, the conical gear I4 drives the rotating shaft 6 to rotate, the rotating shaft 6 drives the scraping rod I7 and the scraping rod II 8 to rotate, the positions of the scraping rod II 8 and the scraping rod I7 increase the stirring range of the material liquid in the reaction kettle 1, the material liquid in the reaction kettle 1 is fully stirred, then the heat-conducting medium is circularly introduced into the heat-exchanging jacket 2 and the heat-exchanging tank through the heat-conducting medium inlet of the heat-exchanging jacket 2 and the heat-conducting medium inlet pipe 9, so that the material liquid after full reaction in the reaction kettle 1 is in heat exchange through contact with the inner wall of the reaction kettle; meanwhile, the first scraping rod 7 and the second scraping rod 8 scrape the crystallized crystals while stirring; the vertical channel on the rotating shaft 6 prevents the heat exchange tank and the scraping mechanism from interfering with each other during operation. The heat exchange jacket 2 and the heat exchange tank are combined with each other, so that the heat exchange area of the feed liquid is not limited to the inner wall of the reaction kettle corresponding to the heat exchange jacket, and the outer wall of the tank body of the heat exchange tank is also included, so that the heat exchange area of the feed liquid in the reaction kettle 1 is increased, and the crystallization efficiency is improved; scrape material mechanism and heat transfer mechanism and mutually support, not only play the mixed stirring effect to the feed liquid, can scrape the crystallization of reation kettle inner wall and jar external wall moreover and take off and discharge from crystal export 15, the mother liquor after the crystallization can let in reation kettle 1 internal recycle once more through mother liquor backward flow mouth 14, improves material utilization ratio, or does other processings.
The technical scheme of the utility model is not limited to the restriction of above-mentioned specific embodiment, all according to the utility model discloses a technical scheme makes technical deformation, all falls into within the protection scope of the utility model.
Claims (3)
1. A NVP continuous crystallization reaction device comprises a reaction kettle, wherein a raw material inlet, a mother liquid reflux port, a crystal outlet, a heat exchange mechanism and a scraping mechanism are arranged on the reaction kettle; the method is characterized in that: the heat exchange mechanism comprises a heat exchange jacket and a heat exchange tank, the heat exchange jacket is fixed on the outer wall of the reaction kettle, a heat conducting medium inlet and a heat conducting medium outlet are arranged on the heat exchange jacket, a flow guide partition plate is arranged in the heat exchange tank, the heat exchange tank comprises a tank body and a feeding and discharging pipe fixedly connected with the top of the tank body, the tank body is positioned in the center of the reaction kettle, the top end of the feeding and discharging pipe extends out of the reaction kettle, the flow guide partition plate divides the interior of the feeding and discharging pipe into a feeding channel and a discharging channel, the feeding channel is connected with a heat conducting medium feeding pipe, and the discharging;
the scraping mechanism comprises a scraping rod I, a scraping rod II, a rotating shaft, a fixed seat, a conical gear I, a conical gear II and a rotating motor; the reaction kettle is characterized in that the first scraping rod is matched with the inner wall of the reaction kettle, the second scraping rod is matched with the outer wall of the tank body, the fixed seat is fixed at the central position of the top end of the reaction kettle, a vertical channel is arranged at the center of the rotating shaft, one end of the rotating shaft extends into the reaction kettle and is connected with the first scraping rod and the second scraping rod through a connecting rod, the other end of the rotating shaft penetrates through the reaction kettle and the fixed seat and extends out of the reaction kettle and is fixedly connected with a first conical gear, the rotating shaft is rotationally sealed with the reaction kettle, the upper end of the fixed seat is rotationally connected with the lower surface of the first conical gear through a bearing, the second conical gear is meshed with the first conical;
the feeding and discharging pipe penetrates through the vertical channel, and the top end of the feeding and discharging pipe is fixedly connected with the fixed seat through the fixed part.
2. The NVP continuous crystallization reaction apparatus according to claim 1, wherein: the fixing piece comprises a hoop and a fixing rod, the hoop is fixed on the periphery of the top end of the feeding and discharging pipe, and the hoop is fixedly connected with the side wall of the fixing seat through the fixing rod.
3. The NVP continuous crystallization reaction apparatus according to claim 1, wherein: the tank body is biconical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921605719.2U CN210751374U (en) | 2019-09-25 | 2019-09-25 | NVP continuous crystallization reaction device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921605719.2U CN210751374U (en) | 2019-09-25 | 2019-09-25 | NVP continuous crystallization reaction device |
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| CN210751374U true CN210751374U (en) | 2020-06-16 |
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| CN201921605719.2U Active CN210751374U (en) | 2019-09-25 | 2019-09-25 | NVP continuous crystallization reaction device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113058284A (en) * | 2021-03-19 | 2021-07-02 | 高安市环瓷达釉料有限公司 | A granulation crystallization device for sodium metasilicate preparation in-process is used |
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2019
- 2019-09-25 CN CN201921605719.2U patent/CN210751374U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113058284A (en) * | 2021-03-19 | 2021-07-02 | 高安市环瓷达釉料有限公司 | A granulation crystallization device for sodium metasilicate preparation in-process is used |
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| TR01 | Transfer of patent right |
Effective date of registration: 20220307 Address after: 454450 No. 1888, Cultural Road (eastern section), Poai County, Jiaozuo, Henan Patentee after: Boai Xinkaiyuan Pharmaceutical Co.,Ltd. Address before: 454450 No. 1888, Cultural Road (eastern section), Poai County, Jiaozuo, Henan Patentee before: BOAI NKY MEDICAL HOLDINGS Ltd. |