CN217549799U - Recovery system for obtaining pyridine from pyridine hydrochloride - Google Patents
Recovery system for obtaining pyridine from pyridine hydrochloride Download PDFInfo
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- CN217549799U CN217549799U CN202220922632.3U CN202220922632U CN217549799U CN 217549799 U CN217549799 U CN 217549799U CN 202220922632 U CN202220922632 U CN 202220922632U CN 217549799 U CN217549799 U CN 217549799U
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Abstract
The utility model discloses a obtain recovery system for pyridine from pyridine hydrochloride belongs to diosmin production technical field, including reation kettle, raw materials storage tank, alkali lye storage tank and rectifying column, reation kettle advances the pipe through the raw materials and links to each other with the raw materials storage tank, reation kettle advances the pipe through alkali lye and links to each other with the alkali lye storage tank, be provided with rabbling mechanism and steam in the reation kettle and advance the pipe, reation kettle passes through the waste liquid pipe and links to each other with first waste liquid jar, reation kettle links to each other with the rectifying column through first evaporating pipe, be provided with first cooler on the first evaporating pipe, the rectifying column top links to each other with the pyridine storage tank through the second evaporating pipe, be provided with the second cooler on the second evaporating pipe, the rectifying column below links to each other with second waste liquid jar through the drain pipe.
Description
Technical Field
The utility model relates to a diosmin production technical field, concretely relates to obtain recovery system for pyridine from pyridine hydrochloride.
Background
Pyridine is an important pesticide and medicine raw material, and is a good organic solvent and organic synthesis catalyst. Pyridine is used in the production of diosmin. If the residual pyridine in the production process is directly discharged, the residual pyridine not only causes harm to the environment, but also has great economic loss, so the pyridine needs to be recovered and stored for secondary use.
Vacuum is often used for improving the concentration efficiency in the concentration process of the high-boiling-point complexing agent, but the addition of a vacuum pump causes a large amount of organic complexing agent to be pumped into a vacuum system and finally becomes waste gas to be discharged; two secondary condensers are additionally arranged at the rear end of the vacuum pump to condense and collect organic gas entering a vacuum system, and the device can improve the solvent recovery rate by 5%; pyridine, a gas which is foul and difficult to degrade (heterocyclic organic matters are difficult to treat) enters a VOC system, so that the system is broken down, and an acid washing tower is additionally arranged before the pyridine enters an acid adsorption tower to collect the pyridine by utilizing the property of the reaction of the pyridine and the acid; pyridine reacts with hydrochloric acid to generate pyridine hydrochloride, a stable chemical substance is easily dissolved in water for collection, and more than 98% of pyridine waste gas can be collected by the method; there is now a lack of recovery systems for recovering pyridine from pyridine hydrochloride solutions.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving the problem that exists among the prior art, provide a obtain recovery system for pyridine from pyridine hydrochloride, pyridine hydrochloride solution and sodium hydroxide solution react in reation kettle and become free pyridine once more, get into the rectification in the rectifying column under the effect of vapor again and obtain high-purity pyridine. The utility model discloses it is effectual and production efficiency is high to have pyridine recovery.
The utility model aims at realizing through the following technical scheme:
a recovery system for obtaining pyridine from pyridine hydrochloride is characterized in that: including reation kettle, raw materials storage tank, alkali lye storage tank and rectifying column, reation kettle advances the pipe through the raw materials and links to each other with the raw materials storage tank, reation kettle advances the pipe through alkali lye and links to each other with the alkali lye storage tank, it advances the pipe to be provided with rabbling mechanism and steam in the reation kettle, reation kettle passes through the waste liquid pipe and links to each other with first waste liquid jar, reation kettle links to each other with the rectifying column through first evaporating pipe, be provided with first cooler on the first evaporating pipe, rectifying column top links to each other with the pyridine storage tank through the second evaporating pipe, be provided with the second cooler on the second evaporating pipe, rectifying column below links to each other with second waste liquid jar through the drain pipe.
Preferably, the raw material inlet pipe and the alkali liquor inlet pipe are both provided with flow meters.
Preferably, valves are arranged on the raw material inlet pipe, the alkali liquor inlet pipe, the steam inlet pipe, the waste liquid pipe and the liquid outlet pipe.
Preferably, the steam inlet pipe is connected with a steam distribution plate, and a plurality of steam nozzles are arranged on the steam distribution plate. (the steam distribution plate is connected with the inner wall of the lower end of the reaction kettle through a fixed support.)
Preferably, the stirring mechanism comprises a stirring motor and a stirring shaft, the stirring motor is arranged above the reaction kettle, the output end of the stirring motor is connected with the stirring shaft, and the stirring shaft is introduced into the reaction kettle and is provided with a plurality of stirring paddles.
Preferably, the first waste liquid tank, the second waste liquid tank and the pyridine storage tank are all provided with liquid level meters.
Preferably, vent pipes are arranged above the first waste liquid tank, the second waste liquid tank and the pyridine storage tank.
The working principle is as follows: the pyridine hydrochloride solution is added into a raw material storage tank, the sodium hydroxide solution is added into an alkali liquor storage tank, the pyridine hydrochloride solution and the sodium hydroxide solution can be accurately added through the arrangement of a flow meter and a valve, the pyridine hydrochloride reacts with the sodium hydroxide to form free pyridine again, mixed pyridine steam (pyridine is evaporated out earlier than water in a strong alkaline environment) flows into a first cooler after being cooled, enters a rectifying tower after being cooled (the pyridine concentration in the feeding material of the rectifying tower is 50-60%), is collected into the pyridine storage tank from a second evaporation pipe and a second cooler after being rectified by the rectifying tower (the pyridine concentration is 99% at the moment), and can be used as qualified pyridine to be put into diosmin again, a reaction kettle periodically discharges waste water into a first waste liquid tank through a waste liquid pipe and a valve, and the rectifying tower discharges heavy components into a second waste liquid tank through a liquid outlet pipe, so that continuous production is realized.
The beneficial effects of this technical scheme are as follows:
1. the utility model provides a pair of obtain recovery system for pyridine in follow pyridine hydrochloride, pyridine hydrochloride solution and sodium hydroxide solution react in reation kettle and become free pyridine once more, and the rectification obtains the high-purity pyridine in getting into the rectifying column under the effect of vapor again. The utility model discloses it is effectual and production efficiency is high to have pyridine recovery.
2. The utility model provides a pair of obtain recovery system for pyridine in follow pyridine hydrochloride, the messenger of flowmeter and valve pyridine hydrochloride solution and sodium hydroxide solution can accurate interpolation, increases the rate of recovery.
3. The utility model provides a pair of obtain recovery system for pyridine in follow pyridine hydrochloride, the setting up of steam distribution dish makes steam distribution more even, guarantees that the heating effect is higher.
4. The utility model provides a pair of obtain recovery system for pyridine in follow pyridine hydrochloride, the setting up of rabbling mechanism makes pyridine hydrochloride solution and sodium hydroxide solution react more thoroughly.
5. The utility model provides a pair of obtain recovery system for pyridine in follow pyridine hydrochloride, the liquid level in the tank is convenient for observe in the setting of level gauge, and the setting of blow-down pipe prevents the unable feed liquor of suppressing pressure in the tank.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a reaction kettle of the present invention;
wherein: 1. a reaction kettle; 2. a raw material storage tank; 3. an alkali liquor storage tank; 4. a rectifying tower; 5. feeding the raw materials into a pipe; 6. feeding alkali liquor into the pipe; 7. a stirring mechanism; 7.1, a stirring motor; 7.2, a stirring shaft; 7.3, a stirring paddle; 8. a steam inlet pipe; 9. a waste liquid pipe; 10. a first waste liquid tank; 11. a first evaporation tube; 12. a first cooler; 13. a second evaporation tube; 14. a pyridine storage tank; 15. a second cooler; 16. a liquid outlet pipe; 17. a second waste liquid tank; 18. a flow meter; 19. a valve; 20. a steam distribution plate; 20.1, a steam nozzle; 20.2, fixing a bracket; 21. a liquid level meter; 22. and (5) emptying the pipe.
Detailed Description
The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.
It will be understood that when an element is referred to as being "on," "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.
As shown in fig. 1 and 2, a recovery system for obtaining pyridine from pyridine hydrochloride comprises a reaction kettle 1, a raw material storage tank 2, an alkali liquor storage tank 3 and a rectification tower 4, wherein the rectification tower 4 adopts a packed tower, the reaction kettle 1 is connected with the raw material storage tank 2 through a raw material inlet pipe 5, the reaction kettle 1 is connected with the alkali liquor storage tank 3 through an alkali liquor inlet pipe 6, a stirring mechanism 7 and a steam inlet pipe 8 are arranged in the reaction kettle 1, the reaction kettle 1 is connected with a first waste liquor tank 10 through a waste liquor pipe 9, the reaction kettle 1 is connected with the rectification tower 4 through a first evaporation pipe 11, a first cooler 12 is arranged on the first evaporation pipe 11, the upper part of the rectification tower 4 is connected with a pyridine storage tank 14 through a second evaporation pipe 13, a second cooler 15 is arranged on the second evaporation pipe 13, and the lower part of the rectification tower 4 is connected with a second waste liquor tank 17 through a liquid outlet pipe 16. The pyridine hydrochloride solution and the sodium hydroxide solution react in the reaction kettle 1 to become free pyridine again, and then enter the rectifying tower 4 under the action of steam for rectification to obtain high-purity pyridine. The utility model discloses it is effectual and production efficiency is high to have the pyridine recovery.
Wherein, the raw material inlet pipe 5 and the alkali liquor inlet pipe 6 are both provided with a flowmeter 18.
Wherein, valves 19 are arranged on the raw material inlet pipe 5, the alkali liquor inlet pipe 6, the steam inlet pipe 8, the waste liquid pipe 9 and the liquid outlet pipe 16. The flow meter 18 and the valve 19 enable the pyridine hydrochloride solution and the sodium hydroxide solution to be accurately added, and the recovery rate is increased.
The steam inlet pipe 8 is connected with a steam distribution plate 20, and a plurality of steam nozzles 20.1 are arranged on the steam distribution plate 20. The steam distribution plate 20 is connected with the inner wall of the lower end of the reaction kettle 1 through a fixed support 20.2. The arrangement of the steam distribution plate 20 enables the steam distribution to be more uniform, and ensures higher heating effect.
Wherein, rabbling mechanism 7 includes agitator motor 7.1 and (mixing) shaft 7.2, agitator motor 7.1 sets up in reation kettle 1 top, agitator motor 7.1 output links to each other with (mixing) shaft 7.2, in reation kettle 1 and be provided with a plurality of stirring rakes 7.3 on the (mixing) shaft 7.2 were introduced into to (mixing) shaft 7.2. The stirring mechanism 7 is arranged to ensure that the pyridine hydrochloride solution and the sodium hydroxide solution react more completely.
Wherein, the first waste liquid tank 10, the second waste liquid tank 17 and the pyridine storage tank 14 are all provided with a liquid level meter 21.
And vent pipes 22 are arranged above the first waste liquid tank 10, the second waste liquid tank 17 and the pyridine storage tank 14. The setting of level gauge 21 is convenient for observe the liquid level in the jar, and the setting of blow-down pipe 22 prevents that jar is suppressed pressure and can't feed liquor.
The working principle is as follows: pyridine hydrochloride solution is added into a raw material storage tank 2, sodium hydroxide solution is added into an alkali liquor storage tank 3, a flow meter 18 and a valve 19 are arranged to accurately add the pyridine hydrochloride solution and the sodium hydroxide solution, the pyridine hydrochloride reacts with the sodium hydroxide to form free pyridine again, pyridine mixed steam (the pyridine is evaporated out earlier than water in a strong alkaline environment) flows into a first cooler 12 after being cooled, enters a rectifying tower 4 after flowing into the first cooler 12 (the pyridine concentration in the feed of the rectifying tower 4 is 50-60%), is collected into a pyridine storage tank 14 from a second evaporation pipe 13 and a second cooler 15 after being rectified by the rectifying tower 4 (the pyridine concentration is 99% at the moment), and can be used as qualified pyridine to be put into Diosmin for production and use again, a reaction kettle 1 periodically discharges waste water into a first waste liquid tank 10 through a waste liquid pipe 9 and a valve 19, and the rectifying tower 4 discharges heavy components into a second waste liquid tank 17 through a liquid outlet pipe 16, so that continuous production is realized.
The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention in any form, and all the technical matters of the present invention are all within the protection scope of the present invention for any simple modification and equivalent change of the above embodiments.
Claims (7)
1. A recovery system for obtaining pyridine from pyridine hydrochloride is characterized in that: including reation kettle (1), raw materials storage tank (2), alkali lye storage tank (3) and rectifying column (4), reation kettle (1) advances pipe (5) through the raw materials and links to each other with raw materials storage tank (2), reation kettle (1) advances pipe (6) through alkali lye and links to each other with alkali lye storage tank (3), be provided with rabbling mechanism (7) and steam in reation kettle (1) and advance pipe (8), reation kettle (1) links to each other with first waste liquid jar (10) through waste liquid pipe (9), reation kettle (1) links to each other with rectifying column (4) through first evaporating pipe (11), be provided with first cooler (12) on first evaporating pipe (11), rectifying column (4) top links to each other with pyridine storage tank (14) through second evaporating pipe (13), be provided with second cooler (15) on second evaporating pipe (13), rectifying column (4) below links to each other with second waste liquid jar (17) through drain pipe (16).
2. A recovery system for pyridine from pyridine hydrochloride according to claim 1, characterized in that: the raw material inlet pipe (5) and the alkali liquor inlet pipe (6) are both provided with flow meters (18).
3. A recovery system for pyridine from pyridine hydrochloride according to claim 2, characterized in that: valves (19) are arranged on the raw material inlet pipe (5), the alkali liquor inlet pipe (6), the steam inlet pipe (8), the waste liquid pipe (9) and the liquid outlet pipe (16).
4. A recovery system for pyridine from pyridine hydrochloride according to claim 3, characterized in that: the steam inlet pipe (8) is connected with a steam distribution disc (20), and a plurality of steam nozzles (20.1) are arranged on the steam distribution disc (20).
5. A recovery system for pyridine from pyridine hydrochloride according to claim 4, characterized in that: stirring mechanism (7) include agitator motor (7.1) and (mixing) shaft (7.2), agitator motor (7.1) sets up in reation kettle (1) top, agitator motor (7.1) output links to each other with (mixing) shaft (7.2), in reation kettle (1) and be provided with a plurality of stirring rakes (7.3) on (mixing) shaft (7.2) are introduced into in (mixing) shaft (7.2).
6. A recovery system for pyridine from pyridine hydrochloride according to claim 5, characterized in that: and liquid level meters (21) are arranged on the first waste liquid tank (10), the second waste liquid tank (17) and the pyridine storage tank (14).
7. The recovery system for pyridine from pyridine hydrochloride according to claim 6, wherein: and vent pipes (22) are arranged above the first waste liquid tank (10), the second waste liquid tank (17) and the pyridine storage tank (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220922632.3U CN217549799U (en) | 2022-04-21 | 2022-04-21 | Recovery system for obtaining pyridine from pyridine hydrochloride |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220922632.3U CN217549799U (en) | 2022-04-21 | 2022-04-21 | Recovery system for obtaining pyridine from pyridine hydrochloride |
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| CN217549799U true CN217549799U (en) | 2022-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220922632.3U Active CN217549799U (en) | 2022-04-21 | 2022-04-21 | Recovery system for obtaining pyridine from pyridine hydrochloride |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115583685A (en) * | 2022-11-10 | 2023-01-10 | 南通新邦化工科技有限公司 | High-concentration wastewater recovery device and method containing ammonia gas and picoline |
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2022
- 2022-04-21 CN CN202220922632.3U patent/CN217549799U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115583685A (en) * | 2022-11-10 | 2023-01-10 | 南通新邦化工科技有限公司 | High-concentration wastewater recovery device and method containing ammonia gas and picoline |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A recovery system for obtaining pyridine from Pyridinium chloride Effective date of registration: 20230711 Granted publication date: 20221011 Pledgee: China Construction Bank Pengzhou Sub branch Pledgor: CHENGDU YAZHONG BIO-PHARMACEUTICAL Co.,Ltd. Registration number: Y2023510000177 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |