CN217988406U - Butyl acetate reflux system - Google Patents
Butyl acetate reflux system Download PDFInfo
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- CN217988406U CN217988406U CN202222217044.2U CN202222217044U CN217988406U CN 217988406 U CN217988406 U CN 217988406U CN 202222217044 U CN202222217044 U CN 202222217044U CN 217988406 U CN217988406 U CN 217988406U
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Abstract
The utility model belongs to the technical field of the technique of acetic acid production and specifically relates to a butyl acetate reflux system is related to, it includes the azeotropic tower, the one-level condenser, the second grade condenser, the delayer, butyl ester backward flow jar and water backward flow jar, be connected with the azeotrope discharging pipe between azeotropic tower and the one-level condenser, be connected with first connecting pipe between one-level condenser and the second grade condenser, be connected with the second connecting pipe between second grade condenser and the delayer, be connected with the butyl ester discharging pipe between delayer and the butyl ester backward flow jar, be connected with the water discharging pipe between delayer and the water backward flow jar, still include the heat exchanger, be connected with butyl ester pan feeding pipe between heat exchanger and the azeotropic tower, be connected with azeotrope admission pipe and the first discharge pipe of azeotrope between heat exchanger and the azeotrope discharging pipe, be connected with azeotrope second discharge pipe between heat exchanger and the first connecting pipe, be connected with the butyl ester back flow between heat exchanger and the butyl ester backward flow jar. This application has the effect that reduces azeotropic tower reboiler steam use amount through the setting of heat exchanger.
Description
Technical Field
The application relates to the technical field of acetic acid production, in particular to a butyl acetate reflux system.
Background
Because the boiling points of acetic acid and water are close, the acetic acid is purified by using an azeotropic distillation method in the production of the acetic acid, butyl acetate and water can form an azeotrope with the boiling point lower than that of the water, and the energy consumption and the production cost can be reduced and saved in the actual production, so the butyl acetate is an important azeotropic agent in the production process of the acetic acid.
In the related technology, after dilute acetic acid and butyl acetate are added into an azeotropic tower, the azeotropic tower is heated to the required temperature by steam in a reboiler, and then azeotropic distillation is started, and the azeotrope of the butyl acetate and water leaves from the top of the tower after the azeotropic distillation, and is returned to the azeotropic tower for recycling after condensation and delamination.
Aiming at the technology, the temperature of the butyl acetate after each recovery is lower, the butyl acetate needs to be circularly heated by an azeotropic tower reboiler, a large amount of steam needs to be consumed in the production process, and the energy consumption is higher.
SUMMERY OF THE UTILITY MODEL
In order to reduce the steam usage of an azeotropic tower reboiler, the application provides a butyl acetate reflux system, which adopts the following technical scheme:
the utility model provides a butyl acetate reflux system, includes azeotropic tower, primary condenser, second grade condenser, delayer, butyl ester backward flow jar and water reflux tank, be connected with the azeotrope discharging pipe between azeotropic tower and the primary condenser, be connected with first connecting pipe between primary condenser and the secondary condenser, be connected with the second connecting pipe between second grade condenser and the delayer, be connected with the butyl ester discharging pipe between delayer and the butyl ester backward flow jar, be connected with the water discharging pipe between delayer and the water reflux jar, still include the heat exchanger, be connected with the butyl ester back flow between heat exchanger and the butyl ester backward flow jar, the butyl ester back flow pipe has set gradually first feed valve, butyl ester reflux unit along direction of delivery, be connected with butyl ester pan feeding pipe between heat exchanger and the azeotropic tower, be connected with azeotrope admission pipe and the first discharge pipe of azeotrope between heat exchanger and the azeotrope discharging pipe, the azeotrope admission pipe is used for carrying gaseous azeotrope to the heat exchanger and is provided with the azeotrope feed valve, azeotrope first discharge pipe of azeotrope is used for carrying azeotrope to the primary condenser and being provided with the azeotrope discharge valve, be connected with the second discharge pipe that is used for carrying liquid azeotrope between heat exchanger and the first connecting pipe.
Through adopting above-mentioned technical scheme, some high temperature azeotrope after the rectification passes through the azeotrope admission pipe with gaseous form and gets into the heat exchanger, low temperature butyl acetate in the butyl ester reflux drum gets into the heat exchanger through the butyl ester back flow, low temperature butyl acetate and high temperature azeotrope accomplish the heat exchange in the heat exchanger, on the one hand, preheated butyl acetate gets into the azeotropic tower through butyl ester pan feeding pipe and participates in azeotropic distillation, can reduce the steam use amount of azeotropic tower reboiler, reduce the energy consumption, on the other hand azeotrope after the precooling gets into the condenser, improve the cooling effect.
Optionally, the butyl ester reflux unit is provided with two at least in parallel, the butyl ester reflux unit includes set gradually second feed valve, butyl ester backwash pump, butyl ester check valve and the third feed valve on the butyl ester back flow along direction of delivery, be connected with the evacuation pipe that is located between second feed valve and the butyl ester backwash pump on the butyl ester back flow, the evacuation pipe is connected with the butyl ester blowoff valve.
By adopting the technical scheme, on one hand, the butyl ester reflux device can be switched to use in the production process, so that the butyl ester reflux device is convenient to maintain and replace, the fault tolerance rate is improved, and the production efficiency is further ensured; on the other hand, when the butyl ester backflow tank needs to be cleaned, the residual liquid can be drained out only by closing the third feeding valve and opening the emptying valve.
Optionally, a water return pipe is connected between the water return tank and the butyl ester return pipe, the water return pipe is sequentially provided with a first discharge valve and a water conveying device along the conveying direction, and the water conveying devices are connected in parallel and are provided with at least two water outlet valves.
Through adopting above-mentioned technical scheme, can switch to use water conveyor in process of production, be convenient for maintain and change water conveyor, improve the fault-tolerant rate, and then guarantee production efficiency.
Optionally, the water discharging pipe, the butyl ester discharging pipe and the water return pipe are connected with sampling pipes, and the sampling pipes are connected with sampling valves.
Through adopting above-mentioned technical scheme, can detect whether water concentration that flows out in water discharging pipe and the water back flow is up to standard, can detect whether butyl ester concentration that flows out in the butyl ester discharging pipe is up to standard.
Optionally, the water return pipe is connected with a drain pipe located between the sampling pipe and the water conveying device, and the drain pipe is provided with a drain valve.
Through adopting above-mentioned technical scheme, the concentration back of wastewater in the water back flow is up to standard, opens the drain valve, and waste water up to standard can directly be discharged away through the drain pipe.
Optionally, the water return pipe is further provided with a first control valve assembly located at the discharge end of the water delivery device, a butyl ester tower inlet pipe is connected between the butyl ester return pipe and the azeotropic tower, the butyl ester tower inlet pipe is connected to the discharge end of the butyl ester return device, the butyl ester tower inlet pipe is provided with a second control valve assembly, and the butyl ester return pipe is provided with a third control valve assembly.
By adopting the technical scheme, when the acid content in the wastewater is overhigh by sampling, the first control valve assembly is opened, the wastewater with high acid content can enter the butyl ester return pipe and the heat exchanger along the water return pipe and finally enter the azeotropic tower, so that the waste of acetic acid is avoided; at the moment, the acetic acid content in the azeotropic tower is higher, the second control valve component is opened, and the butyl acetate in the butyl ester reflux tank can enter the azeotropic tower along the butyl ester entering tower pipe, so that the ratio of the acetic acid content to the butyl acetate content reaches a proper ratio, and the production efficiency is ensured.
Optionally, the middle part of the second azeotrope discharge pipe is set to be a U-shaped liquid seal section, and the bottom of the liquid seal section is connected with a liquid discharge valve.
By adopting the technical scheme, liquid seal can be formed at the liquid seal section, so that a gaseous azeotrope is prevented from entering the secondary condenser through the second azeotrope discharge pipe, and the cooling effect is ensured; when the second azeotrope discharge pipe needs to be overhauled, only the liquid discharge valve needs to be opened.
Optionally, the first connecting pipe is connected to a pipe sight glass, and the pipe sight glass is located between the second azeotrope discharge pipe and the secondary condenser.
By adopting the technical scheme, the cooling condition of the azeotrope can be observed, and the azeotrope is ensured to enter the secondary condenser in a liquid state.
Optionally, the butyl ester reflux tank and the delayer are both connected with a recovery pipe, and the recovery pipe can receive butyl ester obtained in the butyl ester recovery process.
By adopting the technical scheme, the recycled butyl ester can be recycled in the production process of acetic acid.
In summary, the present application includes at least one of the following beneficial technical effects:
1. by arranging the heat exchanger, the steam usage amount of the reboiler of the azeotropic tower is reduced, and the energy consumption is reduced;
2. by arranging the water return pipe, the first control valve assembly, the butyl acetate tower inlet pipe and the second control valve assembly, the acetic acid can be fed back into the azeotropic tower when the acid content in the water is too high, so that the waste of the acetic acid is avoided, and the production efficiency is ensured by introducing butyl acetate;
3. through setting up the liquid seal section, can make gaseous state azeotrope get into the second grade condenser through the one-level condenser earlier, ensure azeotrope condensation effect.
Drawings
Fig. 1 is a schematic structural diagram of a butyl acetate reflux system according to an embodiment of the present application.
FIG. 2 is a schematic diagram of the heat exchanger, primary condenser and secondary condenser sections of an embodiment of the present application.
Fig. 3 is a schematic diagram of a structure at a delayer according to an embodiment of the present application.
Fig. 4 is a schematic structural view of a water return tank according to an embodiment of the present application.
FIG. 5 is a schematic diagram of the structure of the butyl ester reflux drum of the embodiment of the present application.
Description of reference numerals: 1. an azeotropic column; 2. a first-stage condenser; 3. a secondary condenser; 4. a delayer; 5. a butyl ester reflux tank; 6. a water reflux tank; 7. an azeotrope discharge pipe; 8. a first connecting pipe; 9. a second connecting pipe; 10. a butyl ester discharge pipe; 11. a water discharging pipe; 12. a heat exchanger; 13. a butyl ester feeding pipe; 14. an azeotrope inlet pipe; 141. an azeotrope feed valve; 15. a first azeotrope discharge pipe; 151. an azeotrope discharge valve; 16. a second discharge pipe for azeotrope; 161. liquid sealing section; 162. a drain valve; 17. a butyl ester reflux pipe; 18. a first feed valve; 19. a butyl ester reflux device; 191. a second feed valve; 192. a butyl ester reflux pump; 193. a butyl ester check valve; 194. a third feed valve; 195. emptying the pipe; 1951. a butyl ester evacuation valve; 20. a water return pipe; 21. a first discharge valve; 22. a water delivery device; 23. a sampling tube; 231. a sampling valve; 24. a drain pipe; 241. a drain valve; 25. a first control valve assembly; 26. feeding butyl ester into a tower pipe; 27. a second control valve assembly; 28. a pipeline sight glass; 29. a recovery pipe; 30. a third control valve assembly.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses butyl acetate reflux system. Referring to fig. 1, a butyl acetate reflux system includes azeotropic tower 1, one-level condenser 2, second grade condenser 3, delayer 4, butyl ester reflux tank 5, heat exchanger 12 and water reflux tank 6, be connected with azeotrope discharging pipe 7 between azeotropic tower 1 top and the one-level condenser 2, be connected with first connecting pipe 8 between one-level condenser 2 and the second grade condenser 3, be connected with second connecting pipe 9 between second grade condenser 3 and the delayer 4, be connected with butyl ester discharging pipe 10 between delayer 4 and the butyl ester reflux tank 5, be connected with water discharging pipe 11 between delayer 4 and the water reflux tank 6, heat exchanger 12 is connected through butyl ester pan feeding pipe 13 with azeotropic tower 1 top side, be connected with butyl ester back flow 17 between heat exchanger 12 and the butyl ester reflux tank 5, butyl ester back flow 17 has set gradually first feed valve 18, butyl ester reflux unit 19 along direction.
Butyl acetate is used as an entrainer to be added into the azeotropic tower 1, azeotrope formed by water contained in the dilute acetic acid and the entrainer is discharged in a gaseous state at the top of the azeotropic tower 1, and the dilute acetic acid is concentrated at the bottom of the azeotropic tower 1. The azeotrope enters a first-stage condenser 2 through an azeotrope discharging pipe 7 in a gaseous state, the azeotrope enters a second-stage condenser 3 through a first connecting pipe 8 after being cooled into liquid, the liquid enters a delayer 4 through a second connecting pipe 9 after secondary cooling, butyl acetate and water are layered after being cooled, the butyl acetate with lower density is positioned on the upper layer, the butyl acetate obtained through separation enters a butyl ester reflux tank 5 through a butyl ester discharging pipe 10, then enters a heat exchanger 12 through a butyl ester reflux pipe 17, finally enters an azeotropic tower 1 through a butyl ester feeding pipe 13 for circulating and mechanical application, and the water obtained through separation enters a water reflux tank 6 through a water discharging pipe 11.
Referring to fig. 1, a first-stage condenser 2, a delayer 4, a butyl ester reflux tank 5 and a water reflux tank 6 are all connected with an exhaust pipe, and the exhaust pipe is sequentially provided with an exhaust valve and a flame arrester along a conveying direction and used for exhausting tail gas.
Referring to fig. 1 and fig. 2, an azeotrope inlet pipe 14 and an azeotrope first discharge pipe 15 are connected between a heat exchanger 12 and an azeotrope discharge pipe 7, the azeotrope inlet pipe 14 is used for conveying an azeotrope to the heat exchanger 12 and is provided with an azeotrope feed valve 141, the azeotrope first discharge pipe 15 is used for conveying the azeotrope from the heat exchanger 12 to a first-stage condenser 2 and is provided with an azeotrope discharge valve 151, and an azeotrope second discharge pipe 16 is connected between the heat exchanger 12 and a first connecting pipe 8. After the rectification is finished, part of the high-temperature azeotrope enters the heat exchanger 12 through the azeotrope inlet pipe 14 in a gaseous state, the low-temperature butyl acetate in the butyl ester reflux tank 5 enters the heat exchanger 12 through the butyl ester reflux pipe 17, the low-temperature butyl acetate and the high-temperature azeotrope finish heat exchange in the heat exchanger 12, and the heated butyl acetate enters the azeotropic tower 1 through the butyl ester feeding pipe 13 to participate in azeotropic rectification; the cooled azeotrope sequentially passes through the azeotrope second discharge pipe 16 and the first connecting pipe 8 in a liquid form and enters the secondary condenser 3, part of the azeotrope still keeps a gaseous form and sequentially enters the azeotrope first discharge pipe 15, the azeotrope discharge pipe 7 and the primary condenser 2 from the azeotrope, and then enters the secondary condenser 3 through the first connecting pipe 8 in a liquid form.
Referring to fig. 2, the middle of the second azeotrope discharge pipe 16 is provided with a U-shaped liquid seal section 161, and the bottom of the liquid seal section 161 is connected to a drain valve 162. The liquid azeotrope forms a liquid seal in the liquid seal section 161, preventing the gaseous azeotrope from passing through the second azeotrope discharge pipe 16 and further entering the secondary condenser 3 through the first connection pipe 8; when the second azeotrope discharge pipe 16 needs to be overhauled, the residual liquid azeotrope can be discharged only by opening the liquid discharge valve 162.
Referring to fig. 2, the first connection pipe 8 is connected between the second azeotrope discharge pipe 16 and the secondary condenser 3 by a pipeline view mirror 28, so that a worker can observe the flowing condition of the liquid azeotrope in the first connection pipe 8 by the pipeline view mirror 28, and ensure that the azeotrope enters the secondary condenser 3 in a liquid state, thereby ensuring the condensation effect.
Referring to fig. 1, a water return pipe 20 is connected between the water return tank 6 and the butyl ester return pipe 17. The water return pipe is used for conveying the wastewater when the acid content in the wastewater is too high.
Referring to fig. 3 and 4, the water discharging pipe 11, the butyl ester discharging pipe 10 and the water return pipe 20 are connected to a sampling pipe 23, and the sampling pipe 23 is connected to a sampling valve 231. The sampling valve 231 is two needle valves, and the operator can sample the liquid in the water discharge pipe 11, the butyl ester discharge pipe 10, and the water return pipe 20 through the sampling valve 231 to measure the concentration.
Referring to fig. 4, the water return pipe 20 is provided with a first discharge valve 21 and two water delivery devices 22 in sequence along the delivery direction, and the two water delivery devices 22 are connected in parallel and can be switched to be used in the production process so as to facilitate the maintenance and replacement of one set of devices. The structure of the water delivery device 22 is identical to that of the butyl ester reflux device 19.
Referring to fig. 4, the water return pipe 20 is connected to a drain pipe 24 between the sampling pipe 23 and the water feeding device 22, and the drain pipe 24 is provided with a drain valve 241. After the sampled water reaches the standard through concentration measurement, a worker can open the drain valve 241, and the wastewater is directly drained from the drain pipe 24.
Referring to fig. 5, two butyl ester reflux devices 19 are arranged in parallel, each butyl ester reflux device 19 comprises a second feed valve 191, a butyl ester reflux pump 192, a butyl ester check valve 193 and a third feed valve 194 which are sequentially arranged on a butyl ester reflux pipe 17 along the conveying direction, an emptying pipe 195 between the second feed valve 191 and the butyl ester reflux pump 192 is connected to the butyl ester reflux pipe 17, and a butyl ester emptying valve 1951 is connected to the emptying pipe 195. When the butyl ester reflux device 19 in use needs to be maintained and replaced, only the second feeding valve 191 and the third feeding valve 194 of the other set of butyl ester reflux device 19 need to be opened, and then the second feeding valve 191 and the third feeding valve 194 of the butyl ester reflux device 19 in use need to be closed; when the butyl ester reflux tank 5 needs to be cleaned, the second feeding valve 191 and the butyl ester emptying valve 1951 are opened.
Referring to fig. 1 and 5, the water return pipe 20 is further provided with a first control valve assembly 25 located at the discharge end of the water delivery device 22, a butyl ester tower inlet pipe 26 is connected between the butyl ester return pipe 17 and the azeotropic tower 1, the butyl ester tower inlet pipe 26 is connected to the discharge end of the butyl ester return device 19, the butyl ester tower inlet pipe 26 is provided with a second control valve assembly 27, and the butyl ester return pipe 17 is provided with a third control valve assembly 30. When the acetic acid content in the wastewater is too high, the water conveying device 22 and the first control valve assembly 25 are opened, the wastewater with high acid content can enter the butyl ester return pipe 17, the heat exchanger 12 and the butyl ester feeding pipe 13 along the water return pipe 20 and finally enter the azeotropic tower 1, so that the acetic acid waste is avoided, meanwhile, the second control valve assembly 27 is opened, the third control valve assembly 30 is closed, the butyl acetate in the butyl ester return tank 5 can enter the azeotropic tower 1 along the butyl ester inlet pipe 26, so that the ratio of the acetic acid content to the butyl acetate content is enabled to reach a proper ratio, and the production efficiency is ensured. The first control valve assembly 25 includes three first control valves connected in series and one second control valve connected in parallel with the three first control valves. The first control valve is normally opened, and when the first control valve breaks down, the second control valve is switched to be opened, so that smooth work is guaranteed. The second and third control valve assemblies 27 and 30 are identical in structure to the first control valve assembly 25.
Referring to fig. 3 and 5, recovery pipes 29 are connected to both the butyl ester reflux drum 5 and the delayer 4, and the recovery pipes 29 can receive the butyl ester obtained in the butyl ester recovery step. The butyl ester and the water entering the delaminating device 4 are delaminated and then enter the butyl ester reflux tank 5 through the butyl ester discharge pipe 10, and are recycled and reused in a butyl acetate reflux system together with the butyl ester entering the butyl ester reflux tank 5.
The implementation principle of the butyl acetate reflux system in the embodiment of the application is as follows: opening an azeotrope feed valve 141 and an azeotrope discharge valve 151, after azeotropic distillation in the azeotropic tower 1 is completed, leaving the high-temperature azeotrope from the tower top in a gaseous form, entering an azeotrope discharge pipe 7, and partially entering a primary condenser 2 along the azeotrope discharge pipe 7; part of the high-temperature azeotrope enters the heat exchanger 12 along the azeotrope inlet pipe 14;
the low-temperature butyl acetate in the butyl ester reflux tank 5 enters a heat exchanger 12 through a butyl ester reflux pipe 17, the low-temperature butyl acetate and the high-temperature azeotrope exchange heat in the heat exchanger 12, the heated butyl acetate enters an azeotropic tower 1 through a butyl ester feeding pipe 13 to participate in azeotropic rectification, the cooled azeotrope enters a first connecting pipe 8 through an azeotrope second discharge pipe 16 in a liquid state form, and then enters a secondary condenser 3, part of the azeotrope still keeps a gaseous state form and sequentially enters a second discharge pipe, an azeotrope discharge pipe 7 and a primary condenser 2 from the azeotrope, and then sequentially enters the first connecting pipe 8 and the secondary condenser 3 in a liquid state form;
the liquid azeotrope is cooled again and then enters a delaminating device 4 for delamination, butyl ester obtained by separation enters a butyl ester reflux tank 5 along a butyl ester discharge pipe 10, and water obtained by separation enters a water reflux tank 6 along a water discharge pipe 11;
opening the first feeding valve 18, the second feeding valve 191 and the third feeding valve 194, and enabling butyl acetate in the butyl ester reflux tank 5 to be pressed into the heat exchanger 12 along the butyl ester reflux pipe 17 by the butyl ester reflux pump 192 to participate in heat exchange;
opening a first discharge valve 21 and a sampling valve 231 close to a water return pipe 20 to measure the concentration of the wastewater, opening a drain valve 241 after the concentration reaches the standard, and directly draining the wastewater reaching the standard through a drain pipe 24;
when the acetic acid content in the wastewater is too high, the water conveying device 22 and the first control valve assembly 25 are opened, the wastewater with high acid content can enter the butyl ester return pipe 17, the heat exchanger 12 and the butyl ester feeding pipe 13 along the water return pipe 20 and finally enter the azeotropic tower 1, so that the acetic acid waste is avoided, meanwhile, the second control valve assembly 27 is opened, the third control valve assembly 30 is closed, the butyl acetate in the butyl ester return tank 5 can enter the azeotropic tower 1 along the butyl ester inlet pipe 26, so that the ratio of the acetic acid content to the butyl acetate content is enabled to reach a proper ratio, and the production efficiency is ensured.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. The utility model provides a butyl acetate reflux system, includes azeotropic tower (1), one-level condenser (2), second grade condenser (3), delayer (4), butyl ester backward flow jar (5) and water backward flow jar (6), be connected with azeotrope discharging pipe (7) between azeotropic tower (1) and one-level condenser (2), be connected with first connecting pipe (8) between one-level condenser (2) and second grade condenser (3), be connected with second connecting pipe (9) between second grade condenser (3) and delayer (4), be connected with butyl ester discharging pipe (10) between delayer (4) and butyl ester backward flow jar (5), be connected with water discharging pipe (11), its characterized in that between delayer (4) and water backward flow jar (6): still include heat exchanger (12), be connected with butyl ester back flow pipe (17) between heat exchanger (12) and butyl ester backward flow jar (5), butyl ester back flow pipe (17) have set gradually first feed valve (18), butyl ester reflux unit (19) along direction of delivery, be connected with butyl ester pan feeding pipe (13) between heat exchanger (12) and azeotropic tower (1), be connected with azeotrope admission pipe (14) and azeotrope first discharge tube (15) between heat exchanger (12) and azeotrope discharging pipe (7), azeotrope admission pipe (14) are used for carrying azeotrope to heat exchanger (12) and are provided with azeotrope feed valve (141), azeotrope first discharge tube (15) are used for carrying gaseous state azeotrope to one-level condenser (2) and are provided with azeotrope bleeder valve (151), be connected with azeotrope second discharge tube (16) that are used for carrying liquid azeotrope between heat exchanger (12) and first connecting pipe (8).
2. The butyl acetate recirculation system of claim 1, wherein: butyl ester reflux unit (19) are parallelly connected to be provided with at least two, butyl ester reflux unit (19) include along direction of delivery set gradually second feed valve (191), butyl ester backwash pump (192), butyl ester check valve (193) and third feed valve (194) on butyl ester back flow (17), be connected with evacuation pipe (195) that are located between second feed valve (191) and butyl ester backwash pump (192) on butyl ester back flow (17), evacuation pipe (195) are connected with butyl ester blowoff valve (1951).
3. The butyl acetate recirculation system of claim 1, wherein: be connected with water back flow (20) between water backward flow jar (6) and butyl ester back flow (17), water back flow (20) have set gradually first bleeder valve (21) and water delivery mechanism (22) along direction of delivery, water delivery mechanism (22) are parallelly connected to be provided with at least two.
4. The butyl acetate recirculation system of claim 3, wherein: the water discharging pipe (11), the butyl ester discharging pipe (10) and the water return pipe (20) are connected with sampling pipes (23), and the sampling pipes (23) are connected with sampling valves (231).
5. The butyl acetate recirculation system of claim 4, wherein: the water return pipe (20) is connected with a drain pipe (24) positioned between the sampling pipe (23) and the water conveying device (22), and the drain pipe (24) is provided with a drain valve (241).
6. The butyl acetate recirculation system of claim 3, wherein: water return pipe (20) still are provided with first control valve subassembly (25) that are located water delivery device (22) discharge end, it advances tower pipe (26) to be connected with butyl ester between butyl ester return pipe (17) and azeotropic tower (1), butyl ester advances tower pipe (26) and connects in the discharge end of butyl ester reflux unit (19), butyl ester advances to be provided with second control valve subassembly (27) on tower pipe (26), be provided with third control valve subassembly (30) on butyl ester return pipe (17).
7. The butyl acetate recirculation system of claim 1, wherein: the middle part of the azeotrope second discharge pipe (16) is provided with a U-shaped liquid seal section (161), and the bottom of the liquid seal section (161) is connected with a liquid discharge valve (162).
8. The butyl acetate recirculation system of claim 1, wherein: the first connecting pipe (8) is connected with a pipeline sight glass (28), and the pipeline sight glass (28) is positioned between the azeotrope second discharge pipe (16) and the secondary condenser (3).
9. The butyl acetate recirculation system of claim 1, wherein: and the butyl ester reflux tank (5) and the delayer (4) are both connected with a recovery pipe (29), and the recovery pipe (29) can receive butyl ester obtained in the butyl ester recovery process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222217044.2U CN217988406U (en) | 2022-08-22 | 2022-08-22 | Butyl acetate reflux system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222217044.2U CN217988406U (en) | 2022-08-22 | 2022-08-22 | Butyl acetate reflux system |
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| Publication Number | Publication Date |
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| CN217988406U true CN217988406U (en) | 2022-12-09 |
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| CN202222217044.2U Active CN217988406U (en) | 2022-08-22 | 2022-08-22 | Butyl acetate reflux system |
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