CN216125219U - High-efficient demineralizer of calcium method trimethylolpropane - Google Patents
High-efficient demineralizer of calcium method trimethylolpropane Download PDFInfo
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- CN216125219U CN216125219U CN202121909454.2U CN202121909454U CN216125219U CN 216125219 U CN216125219 U CN 216125219U CN 202121909454 U CN202121909454 U CN 202121909454U CN 216125219 U CN216125219 U CN 216125219U
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Abstract
The utility model discloses a calcium-method efficient trimethylolpropane desalting device, and relates to the technical field of chemical industry. The device comprises a first extraction tower and a second extraction tower, wherein a first settling tank is communicated with the top of the first extraction tower, a feed inlet of the first extraction tower is communicated with a feed inlet of the second extraction tower, a second settling tank is communicated with a feed inlet of the second extraction tower, a first water phase outlet and a second water phase outlet are arranged at the bottom of the first extraction tower and the bottom of the second extraction tower, a first liquid-liquid separation device is communicated with a third oil phase outlet of the first settling tank, a second liquid-liquid separation device is communicated with a third oil phase outlet of the second settling tank, a first extraction collecting tank is communicated with a fourth oil phase outlet of the first liquid-liquid separation device, and a second extraction collecting tank is communicated with a fifth oil phase outlet of the second liquid-liquid separation device. The method can reduce the moisture in the oil phase, reduce the enrichment of internal formate, and has great effects on reducing the product chromaticity, improving the product quality and the calcium formate yield.
Description
Technical Field
The utility model relates to the technical field of chemical industry, in particular to a high-efficiency desalting device for trimethylolpropane by a calcium method.
Background
Industrially, TMP mainly uses n-butyraldehyde and formaldehyde as main raw materials, and is subjected to condensation reaction under the action of an alkaline catalyst to prepare an intermediate dimethylolbutyraldehyde, and the intermediate is further reacted with formaldehyde to generate trimethylolpropane.
At present, the domestic production process of trimethylolpropane is divided into a sodium method and a calcium method, namely, sodium hydroxide or calcium hydroxide is used as a raw material. The calcium method process has gradually replaced the sodium method process due to the advantages of short flow, low cost, low labor intensity, environmental protection, energy conservation and the like. However, after the trimethylolpropane is prepared by the sodium method, the trimethylolpropane still needs to be extracted and separated by an extraction process, however, in the extraction process, the trimethylolpropane still carries part of water phase substances containing salts, so that on one hand, colored impurities in the water phase are easily mixed, on the other hand, the enrichment of formate is increased, the yield of calcium formate is reduced, and meanwhile, the product quality is influenced.
SUMMERY OF THE UTILITY MODEL
Based on the above description, the utility model provides a high-efficiency desalting device for trimethylolpropane by a calcium method, which aims to solve the problem that the product quality is influenced due to the inclusion of water-phase salt impurities in the production process of trimethylolpropane.
The technical scheme for solving the technical problems is as follows:
a high-efficient demineralizer of calcium method trimethylolpropane, includes first extraction tower and second extraction tower, first extraction tower intercommunication is provided with extraction solvent storage tank and trimethylolpropane storage tank, the top of first extraction tower is provided with first oil phase export, first oil phase export intercommunication is provided with first subsider, and the bottom of first extraction tower is provided with first aqueous phase export, and first extraction tower is linked together with the feed inlet of second extraction tower, the feed inlet of second extraction tower still communicates and is provided with the soft water import, and second extraction tower upper portion intercommunication is provided with second oil phase export, second oil phase export intercommunication is provided with the second subsider, and the bottom of second extraction tower is provided with second aqueous phase export, still be provided with third oil phase export and third aqueous phase export on first subsider and the second subsider respectively, the third oil phase export intercommunication of first subsider is provided with first liquid-liquid separation device, the third oil phase outlet of the second settling tank is communicated with a second liquid-liquid separation device, the first liquid-liquid separation device is provided with a fourth oil phase outlet and a fourth water phase outlet, the fourth oil phase outlet is communicated with a first extraction collecting tank, the second liquid-liquid separation device is provided with a fifth oil phase outlet and a fifth water phase outlet, the fifth oil phase outlet is communicated with a second extraction collecting tank, the second extraction collecting tank is provided with a sixth oil phase outlet and a sixth water phase outlet, and the first water phase outlet, the second water phase outlet, the third water phase outlet, the fourth water phase outlet, the fifth water phase outlet and the sixth water phase outlet are communicated with a third extraction collecting tank.
On the basis of the technical scheme, the utility model can be further improved as follows.
In the utility model, a pipeline mixer is arranged between the extraction solvent storage tank and the first extraction tower in a communicating manner, and the pipeline mixer is also arranged in a communicating manner with the trimethylolpropane storage tank.
In the utility model, a solvent feeding pump is further arranged between the extraction solvent storage tank and the pipeline mixer, and a feeding pump is arranged between the trimethylolpropane storage tank and the pipeline mixer.
In the utility model, the discharge hole of the first extraction collecting tank is also communicated with the feed inlet of the second extraction tower through a feed pump.
Preferably, first settling tank is the same with the structure of second settling tank, and first settling tank and second settling tank all include the casing, the inside fixed mounting of casing has the baffle, the baffle separates into water phase groove and oil phase groove with first settling tank or second settling tank, the water phase tank bottom is provided with the third water phase export, oil phase tank bottom is provided with the third oil phase export, and baffle upper portion is provided with the through-hole.
Further, the through hole is positioned at the 3/4-4/5 height of the upper part of the partition board.
In the utility model, the first liquid-liquid separation device and the second liquid-liquid separation device are liquid-liquid centrifuges.
Compared with the prior art, the technical scheme of the application has the following beneficial technical effects:
1. the second extraction tower is arranged, so that the part which is separated from the first extraction tower and contains the oil phase and the water phase can be subjected to secondary extraction, and the yield of the trimethylolpropane can be improved;
2. the utility model can carry out secondary separation on the oil phase and the water phase by arranging the settling tank and the liquid-liquid separation device, reduce the moisture in the discharged oil phase, prevent the enrichment of formate, reduce the content of formate and simultaneously improve the product quality.
Drawings
FIG. 1 is a schematic structural diagram of an efficient desalting apparatus for calcium trimethylolpropane provided in an embodiment of the utility model;
FIG. 2 is a schematic structural diagram of a first/second settling tank in an embodiment of the utility model;
in the drawings, the components represented by the respective reference numerals are listed below:
1. a first extraction column; 2. a second extraction column; 3. an extraction solvent storage tank; 4. a trimethylolpropane reservoir; 5. a first oil phase outlet; 6. a first settling tank; 7. a first aqueous phase outlet; 8. a soft water inlet; 9. a second oil phase outlet; 10. a second settling tank; 11. a second aqueous phase outlet; 12. a third oil phase outlet; 13. a third aqueous phase outlet; 14. a first liquid-liquid separation device; 15. a second liquid-liquid separation device; 16. a fourth aqueous phase outlet; 17. a first extraction collection tank; 18. a fifth oil phase outlet; 19. a fifth aqueous phase outlet; 20. a second extraction collection tank; 21. a third extraction collection tank; 22. a pipeline mixer; 23. a sixth oil phase outlet; 24. a sixth aqueous phase outlet; 25. a fourth oil phase outlet; 26. a feeding pump; 27. a solvent feed pump; 28. a housing; 29. a partition plate; 30. a through hole; 31. an aqueous phase tank; 32. an oil phase tank.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
As shown in fig. 1 and 2, the device for efficiently removing salt from trimethylolpropane by calcium method comprises a first extraction tower 1 and a second extraction tower 2, wherein the first extraction tower 1 is provided with an extraction solvent storage tank 3 and a trimethylolpropane storage tank 4 in a communication manner, the top of the first extraction tower 1 is provided with a first oil phase outlet 5, the first oil phase outlet 5 is provided with a first settling tank 6 in a communication manner, the bottom of the first extraction tower 1 is provided with a first aqueous phase outlet 7, the first extraction tower 1 is communicated with a feed inlet of the second extraction tower 2, the feed inlet of the second extraction tower 2 is further provided with a soft water inlet 8 in a communication manner, the upper part of the second extraction tower 2 is provided with a second oil phase outlet 9 in a communication manner, the second oil phase outlet 9 is provided with a second settling tank 10 in a communication manner, the bottom of the second extraction tower 2 is provided with a second aqueous phase outlet 11, the first settling tank 6 and the second settling tank 10 are further provided with a third oil phase outlet 12 and a third aqueous phase outlet 13 respectively, a third oil phase outlet 12 of the first settling tank 6 is communicated with a first liquid-liquid separation device 14, a third oil phase outlet 12 of the second settling tank 10 is communicated with a second liquid-liquid separation device 15, the first liquid-liquid separation device 14 is provided with a fourth oil phase outlet 25 and a fourth water phase outlet 16, the fourth oil phase outlet 25 is communicated with a first extraction collecting tank 17, the second liquid-liquid separation device 15 is provided with a fifth oil phase outlet 18 and a fifth water phase outlet 19, the fifth oil phase outlet 18 is communicated with a second extraction collecting tank 20, the second extraction collecting tank 20 is provided with a sixth oil phase outlet 23 and a sixth water phase outlet 24, and the first water phase outlet 7, the second water phase outlet 11, the third water phase outlet 13, the fourth water phase outlet 16, the fifth water phase outlet 19 and the sixth water phase outlet 24 are all communicated with a third extraction collecting tank 21.
In the utility model, a pipeline mixer 22 is arranged between the extraction solvent storage tank 3 and the first extraction tower 1 in a communicating manner, and the pipeline mixer 22 is also arranged in a communicating manner with the trimethylolpropane storage tank 4. Namely, the trimethylolpropane storage tank 4 and the extraction solvent storage tank 3 are connected in parallel and then connected in series with the pipeline mixer 22, so that the trimethylolpropane and the extraction solvent can be uniformly mixed.
In the utility model, the discharge hole of the first extraction collecting tank 17 is also communicated with the feed hole of the second extraction tower 2 through a feed pump 26.
The desalting device mainly comprises the following operation steps:
(1) allowing trimethylolpropane in the trimethylolpropane storage tank and an extraction solvent in the extraction solvent storage tank to enter a first extraction tower according to a certain proportion through a pipeline mixer;
(2) after being fully mixed in the first extraction tower, the top oil phase enters a first settling tank from a first oil phase outlet;
(3) the bottom water phase of the first extraction tower enters a third extraction collecting tank from a first water phase outlet; the middle part of the joint of the oil phase and the water phase enters a second extraction tower;
(4) after the oil phase is subjected to primary sedimentation in a first sedimentation tank, carrying out water diversion operation, and overflowing to a first liquid-liquid centrifugal machine for centrifugal operation;
(5) after being separated by the liquid-liquid separation device, the oil phase enters a first extraction collecting tank, and the bottom water phase enters a third extraction collecting tank;
(6) the first extraction collecting tank enters the second extraction tower again for soft water adding backwashing extraction;
(7) the top of the second extraction tower enters a second settling tank;
(8) after sedimentation separation in a second sedimentation tank, the bottom water phase enters a third extraction collecting tank, and the top of the third extraction collecting tank overflows to a second liquid-liquid centrifuge;
(9) after being separated by the liquid-liquid separation device, the centrifugal oil phase enters a second extraction collecting tank, and the centrifugal water phase enters a first extraction collecting tank;
(10) and after the second extraction collecting tank is settled, the bottom water phase enters a third extraction collecting tank from a sixth water phase outlet, and the top oil phase enters the rectification tank from a sixth oil phase outlet to carry out the next operation.
In the present invention, a solvent feeding pump 27 is further disposed between the extraction solvent storage tank 3 and the pipeline mixer 22, a feeding pump 26 is disposed between the trimethylolpropane storage tank 4 and the pipeline mixer 22, and the extraction solvent and the trimethylolpropane are pumped into the pipeline mixer 22 by the feeding pump 26 and are uniformly mixed.
Referring to fig. 2, as a further improvement of the present invention, the first settling tank 6 and the second settling tank 10 have the same structure, and the first settling tank 6 and the second settling tank 10 both include a housing 28, a partition 29 is fixedly installed inside the housing 28, the partition 29 partitions the first settling tank 6 or the second settling tank 10 into a water phase tank 31 and an oil phase tank 32, wherein the bottom of the water phase tank 31 is provided with a third water phase outlet 13, the bottom of the oil phase tank 32 is provided with a third oil phase outlet 12, and the upper part of the partition 29 is provided with a through hole 30. Further, the through-hole 30 is located at the height of 3/4-4/5 of the upper portion of the partition.
After the sedimentation effect of the first sedimentation tank 6 or the second sedimentation tank 10, the oil phase is lower in density than water and is located at the upper part of the sedimentation tank, the water phase is located at the bottom of the sedimentation tank, at this time, by opening the through hole 30, the oil phase located at the upper part overflows through the through hole 30 and enters the oil phase tank 32, and the water phase and the part possibly containing part of the oil phase are remained in the water phase tank 31 and then flow into the third extraction collection tank 21.
In the utility model, the first liquid-liquid separation device and the second liquid-liquid separation device are liquid-liquid centrifuges. The liquid-liquid centrifugal machine is simple to operate, convenient to use and good in separation effect.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The high-efficiency desalting device for trimethylolpropane by a calcium method is characterized in that: including first extraction tower and second extraction tower, first extraction tower intercommunication is provided with extraction solvent storage tank and trimethylolpropane storage tank, the top of first extraction tower is provided with first oil phase export, first oil phase export intercommunication is provided with first subsider, and the bottom of first extraction tower is provided with first aqueous phase export, and the feed inlet of first extraction tower and second extraction tower is linked together, the feed inlet of second extraction tower still communicates and is provided with soft water import, and second extraction tower upper portion intercommunication is provided with second oil phase export, second oil phase export intercommunication is provided with the second subsider, and the bottom of second extraction tower is provided with second aqueous phase export, still be provided with third oil phase export and third aqueous phase export on first subsider and the second subsider respectively, the third oil phase export intercommunication of first subsider is provided with first liquid-liquid separation device, the third oil phase outlet of the second settling tank is communicated with a second liquid-liquid separation device, the first liquid-liquid separation device is provided with a fourth oil phase outlet and a fourth water phase outlet, the fourth oil phase outlet is communicated with a first extraction collecting tank, the second liquid-liquid separation device is provided with a fifth oil phase outlet and a fifth water phase outlet, the fifth oil phase outlet is communicated with a second extraction collecting tank, the second extraction collecting tank is provided with a sixth oil phase outlet and a sixth water phase outlet, and the first water phase outlet, the second water phase outlet, the third water phase outlet, the fourth water phase outlet, the fifth water phase outlet and the sixth water phase outlet are communicated with a third extraction collecting tank.
2. The efficient desalting device for the calcium trimethylolpropane as recited in claim 1, wherein: a pipeline mixer is arranged between the extraction solvent storage tank and the first extraction tower in a communicating manner, and the pipeline mixer is also arranged in a communicating manner with the trimethylolpropane storage tank.
3. The efficient desalting device for the calcium trimethylolpropane as recited in claim 2, wherein: a solvent feeding pump is arranged between the extraction solvent storage tank and the pipeline mixer, and a feeding pump is arranged between the trimethylolpropane storage tank and the pipeline mixer.
4. The efficient desalting device for the calcium trimethylolpropane as recited in claim 1, wherein: and the discharge hole of the first extraction collecting tank is communicated with a feed inlet of a second extraction tower through a feed pump.
5. The efficient desalting device for the calcium trimethylolpropane as recited in claim 1, wherein: first subsider is the same with the structure of second subsider, and first subsider all includes the casing with the second subsider, the inside fixed mounting of casing has the baffle, the baffle separates into water phase groove and oil phase groove with first subsider or second subsider, water phase tank bottom is provided with the export of third water phase, oil phase tank bottom is provided with the export of third oil phase, and baffle upper portion is provided with the through-hole.
6. The efficient desalting device for the calcium trimethylolpropane as recited in claim 5, characterized in that: the through holes are positioned at the 3/4-4/5 height of the upper part of the clapboard.
7. The efficient desalting device for the calcium trimethylolpropane as recited in claim 1, wherein: the first liquid-liquid separation device and the second liquid-liquid separation device are liquid-liquid centrifuges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121909454.2U CN216125219U (en) | 2021-08-13 | 2021-08-13 | High-efficient demineralizer of calcium method trimethylolpropane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121909454.2U CN216125219U (en) | 2021-08-13 | 2021-08-13 | High-efficient demineralizer of calcium method trimethylolpropane |
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| Publication Number | Publication Date |
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| CN216125219U true CN216125219U (en) | 2022-03-25 |
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| CN202121909454.2U Active CN216125219U (en) | 2021-08-13 | 2021-08-13 | High-efficient demineralizer of calcium method trimethylolpropane |
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