CN216592938U - BP-3 mother liquor distillation heat recovery system for ultraviolet absorbent production - Google Patents
BP-3 mother liquor distillation heat recovery system for ultraviolet absorbent production Download PDFInfo
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- CN216592938U CN216592938U CN202122659487.2U CN202122659487U CN216592938U CN 216592938 U CN216592938 U CN 216592938U CN 202122659487 U CN202122659487 U CN 202122659487U CN 216592938 U CN216592938 U CN 216592938U
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Abstract
A BP-3 mother liquor distillation heat recovery system for ultraviolet absorbent production comprises a primary loop, a secondary loop and a tertiary loop, wherein the primary loop is communicated with the secondary loop, the secondary loop is communicated with the tertiary loop, an evaporator overflow pipeline in the primary loop is communicated with a mother liquor buffer tank of the secondary loop, a distillation overflow pipeline of the distillation buffer tank is communicated with a mother liquor buffer tank of the secondary loop, the mother liquor buffer overflow pipeline is communicated with a tertiary heat exchanger, a mother liquor tank is communicated with the mother liquor buffer overflow pipeline and the tertiary heat exchanger, mother liquor to be distilled firstly undergoes heat exchange and primary temperature rise in the tertiary loop, enters the secondary loop after preheating to undergo heat exchange with methanol vapor and high-temperature methanol liquor, enters an evaporator after fully absorbing the heat of distilled methanol, and the methanol vapor and liquefied high-temperature methanol undergo gradient temperature reduction in the mother liquor and then overflow to a methanol collection tank to form heat recovery steps, energy saving and environmental protection.
Description
Technical Field
The utility model belongs to the technical field of chemical engineering, and relates to a BP-3 mother liquor distillation heat recovery system for producing an ultraviolet absorbent.
Background
In the chemical field, a BP-3 mother liquor distillation device is used as a core device in the production process, methanol is distilled through high-temperature steam and water delivery in the working process, the temperature of the methanol is lower before the methanol enters the BP-3 mother liquor distillation device, and a large amount of heat generated by the BP-3 mother liquor distillation device in the working process is not fully utilized, so that the heat utilization efficiency is low, and the energy consumption is increased.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a BP-3 mother liquor distillation heat recovery system for producing ultraviolet absorbent, which adopts a primary loop to be communicated with a secondary loop, the secondary loop is communicated with a tertiary loop, an evaporator overflow pipeline in the primary loop is communicated with a mother liquor buffer tank of the secondary loop, a distillation overflow pipeline of the distillation buffer tank is communicated with a mother liquor buffer tank of the secondary loop, the mother liquor buffer overflow pipeline is communicated with a tertiary heat exchanger, the mother liquor tank is communicated with the mother liquor buffer overflow pipeline and the tertiary heat exchanger, the mother liquor to be distilled firstly undergoes heat exchange and primary temperature rise through the tertiary loop, enters the secondary loop after preheating to exchange heat with methanol vapor and high-temperature methanol liquid, enters the evaporator after fully absorbing the heat of distilled methanol, the methanol vapor and liquefied high-temperature methanol undergo gradient temperature reduction through the mother liquor and then overflow to a methanol collection tank to form step heat recovery and utilization, energy saving and environmental protection.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: a BP-3 mother liquor distillation heat recovery system for ultraviolet absorbent production comprises a primary loop, a secondary loop and a tertiary loop; an overflow pipeline of the evaporator in the primary loop is communicated with a mother liquor buffer tank of the secondary loop, the distillate buffer tank and the primary heat exchanger are communicated with the secondary heat exchanger, and the mother liquor buffer tank is communicated with the primary heat exchanger and the evaporator; a tertiary heat exchanger in the tertiary loop is communicated with a distillation overflow pipeline of a distillate buffer tank and a mother liquor buffer tank, and a methanol collection tank is communicated with the distillate buffer tank; the mother liquor tank is communicated with the mother liquor buffering overflow pipeline and the third-stage heat exchanger.
The upper end of the evaporator of the primary loop is communicated with the top end of the primary heat exchanger, and an evaporator overflow pipeline is arranged on one side of the evaporator; the side surface of the evaporator is also provided with a steam inlet pipe and a water delivery pipe, and the upper end and the lower end of the evaporator are respectively provided with a liquid level meter and a slag discharge pipe.
The lower end of the primary heat exchanger is connected with the upper end of a distillate buffer tank, and a pipeline at one side of the distillate buffer tank and a pipeline at the lower end of the distillate buffer tank are respectively communicated with the upper end and the lower end of the secondary heat exchanger; and a distillation overflow pipeline is further arranged on one side of the distillate buffer tank and communicated with the top end of the third-stage heat exchanger, a distillate pump is further arranged in a pipeline at the lower end of the distillate buffer tank, and a distillate discharge pipe is arranged in a pipeline on the liquid inlet side of the distillate pump and communicated with the methanol collection tank.
The upper end of a mother liquor buffer tank in the secondary loop is connected with the lower end of a secondary heat exchanger, and the top end of the secondary heat exchanger is communicated with the upper end of a primary heat exchanger; a mother liquor buffer overflow pipeline is arranged on one side of the mother liquor buffer tank; a pipeline at the lower end of the mother liquid buffer tank is connected with a mother liquid buffer pump, the mother liquid buffer pump is divided into two paths which are respectively communicated with the lower end of the primary heat exchanger and the upper end of the evaporator, and a buffer flowmeter is arranged in the pipeline communicated with the upper end of the evaporator; and a mother liquid buffer drain communicated with the upper end of the tertiary heat exchanger is arranged in a pipeline at the liquid inlet side of the mother liquid buffer pump.
The upper end of a methanol collecting tank in the third-stage loop is connected with the lower end of a third-stage heat exchanger, the lower end of the methanol collecting tank is divided into two paths which are respectively communicated with a first methanol metering tank and a second methanol metering tank, and the upper end of the third-stage heat exchanger is communicated with a mother liquor tank.
The lower end of the mother liquor tank is communicated with a mother liquor pump, the outlet side of the mother liquor pump is divided into two paths which are respectively communicated with the lower end of the tertiary heat exchanger and the mother liquor buffer tank, and a mother liquor flowmeter is arranged in a pipeline communicated with the mother liquor buffer tank.
The lower ends of the first methanol metering tank and the second methanol metering tank are communicated through a double-circulating pump, and the liquid outlet side of the double-circulating pump is communicated with a pipeline on the liquid inlet side of the mother liquid pump.
The utility model has the main beneficial effects that:
methanol steam generated during the operation of the evaporator enters the top of the primary heat exchanger for heat exchange, and liquid high-temperature methanol formed after cooling flows into the distillate buffer tank; high-temperature methanol in the evaporator overflows into a mother liquor buffer tank through an evaporator overflow pipeline.
Methanol steam at the upper part in the distillate buffer tank enters the upper part of the secondary heat exchanger, and the distillate pump conveys high-temperature methanol to the secondary heat exchanger for heat exchange; or the high-temperature methanol overflows to the top of the three-stage heat exchanger through a distillation overflow pipeline for heat exchange; or the high-temperature methanol is drained from the distillate at the bottom of the distillate buffer tank into a methanol collection tank.
During the heat exchange process of the secondary heat exchanger, formed methanol steam returns to the upper end of the primary heat exchanger from the top end of the secondary heat exchanger, and formed liquid medium-temperature methanol flows into the mother liquor buffer tank.
Liquid medium-temperature methanol in a mother liquor buffer tank is respectively conveyed in two ways through a mother liquor buffer pump, wherein one way flows into the distillate buffer tank from the lower end of the primary heat exchanger, and the other way flows into an evaporator; or liquid medium-temperature methanol overflows into a mother liquor tank through a mother liquor buffer overflow pipeline to preheat the mother liquor; or liquid medium-temperature methanol is discharged into the upper end of the three-stage heat exchanger for heat exchange through mother liquor buffering.
And in the heat exchange process of the tertiary heat exchanger, formed methanol steam enters the mother liquor tank from the upper end of the tertiary heat exchanger to preheat mother liquor, formed liquid low-temperature methanol enters the methanol collecting tank, and is discharged into the first methanol metering tank and the second methanol metering tank after reaching a set liquid level value.
Mother liquor in the mother liquor tank is respectively conveyed in two ways through a mother liquor pump, wherein one way is conveyed to a methanol collecting tank, and the other way is conveyed to a mother liquor buffer tank.
Liquid low-temperature methanol in the first methanol metering tank and the second methanol metering tank is conveyed to the liquid inlet side of the mother liquor pump through the double-circulation pump, and then is respectively conveyed by the mother liquor pump in two paths.
Drawings
The utility model is further illustrated by the following figures and examples.
FIG. 1 is a system diagram of the present invention.
FIG. 2 is a flow chart of the liquid outlet side of the primary loop of the present invention.
FIG. 3 is a flow chart of the liquid outlet side of the secondary circuit of the present invention.
FIG. 4 is a flow chart of the three-stage loop and the liquid outlet side of the mother liquid tank.
In the figure: the system comprises an evaporator 11, a primary heat exchanger 12, an evaporator overflow pipeline 13, a distillate buffer tank 14, a distillation overflow pipeline 15, a distillate pump 16, a distillate discharge pipe 17, a mother liquor buffer tank 21, a secondary heat exchanger 22, a mother liquor buffer overflow pipeline 23, a mother liquor buffer pump 24, a buffer flowmeter 25, a mother liquor buffer discharge pipe 26, a methanol collection tank 31, a tertiary heat exchanger 32, a first methanol metering tank 33, a second methanol metering tank 34, a double-circulation pump 35, a mother liquor tank 4, a mother liquor pump 41 and a mother liquor flowmeter 42.
Detailed Description
As shown in FIG. 1, a BP-3 mother liquor distillation heat recovery system for ultraviolet absorbent production comprises a primary loop, a secondary loop and a tertiary loop; an evaporator overflow pipeline 13 in the primary loop is communicated with a mother liquor buffer tank 21 of the secondary loop, a distillate buffer tank 14 and a primary heat exchanger 12 are both communicated with a secondary heat exchanger 22, and the mother liquor buffer tank 21 is communicated with the primary heat exchanger 12 and an evaporator 11; a tertiary heat exchanger 32 in the tertiary loop is communicated with a distillation overflow pipeline 15 of the distillate buffer tank 14 and the mother liquor buffer tank 21, and a methanol collection tank 31 is communicated with the distillate buffer tank 14; the mother liquor tank 4 is communicated with a mother liquor buffer overflow pipeline 23 and a three-stage heat exchanger 32. During the use, treat that distilled mother liquor at first tentatively heaies up through tertiary return circuit heat transfer, gets into second grade return circuit and methyl alcohol steam and high temperature methyl alcohol liquid heat transfer after preheating, gets into the evaporimeter after fully absorbing the heat of distilling off methyl alcohol, and methyl alcohol steam and liquefied high temperature methyl alcohol overflow to methyl alcohol collection tank 31 after the stock solution echelon cooling, form heat step recycle, energy-concerving and environment-protective.
In a preferred scheme, the upper end of an evaporator 11 of the primary loop is communicated with the top end of a primary heat exchanger 12, and an evaporator overflow pipeline 13 is arranged on one side of the evaporator 11; the side surface of the evaporator 11 is also provided with a steam inlet pipe and a water delivery pipe, and the upper end and the lower end of the evaporator 11 are respectively provided with a liquid level meter and a slag discharge pipe. When in use, the evaporator 11 needs to continuously inject steam and water in the process of evaporating the mother liquor, and generates a large amount of heat, and the generated sediment is discharged by the slag discharge pipe; high-temperature methanol steam generated by the evaporator 11 enters the top of the primary heat exchanger 12 for heat exchange, and the high-temperature methanol in the evaporator 11 overflows into the mother liquor buffer tank 21 through the evaporator overflow pipeline 13.
In a preferred scheme, the lower end of the primary heat exchanger 12 is connected with the upper end of a distillate buffer tank 14, and a pipeline at one side and a pipeline at the lower end of the distillate buffer tank 14 are respectively communicated with the upper end and the lower end of a secondary heat exchanger 22; a distillation overflow pipeline 15 is arranged on one side of the distillate buffer tank 14 and communicated with the top end of the tertiary heat exchanger 32, a distillate pump 16 is arranged in a pipeline at the lower end of the distillate buffer tank 14, and a distillate discharge pipe 17 is arranged in a pipeline on the liquid inlet side of the distillate pump 16 and communicated with the methanol collection tank 31.
Preferably, the methanol vapor in the upper part of the distillate buffer tank 14 enters the upper part of the secondary heat exchanger 22, and the distillate pump 16 delivers the high temperature methanol to the secondary heat exchanger 22 for heat exchange.
Preferably, the high temperature methanol overflows to the top of the tertiary heat exchanger 32 through the distillation overflow line 15 for heat exchange.
Preferably, the high temperature methanol is removed from the distillate at the bottom of the distillate surge tank 14 through 17 to the methanol collection tank 31.
In the preferred scheme, the upper end of a mother liquor buffer tank 21 in the secondary loop is connected with the lower end of a secondary heat exchanger 22, and the top end of the secondary heat exchanger 22 is communicated with the upper end of a primary heat exchanger 12; a mother liquor buffer overflow pipeline 23 is arranged on one side of the mother liquor buffer tank 21; a pipeline at the lower end of the mother liquid buffer tank 21 is connected with a mother liquid buffer pump 24, the mother liquid buffer pump 24 is divided into two paths which are respectively communicated with the lower end of the primary heat exchanger 12 and the upper end of the evaporator 11, and a buffer flowmeter 25 is arranged in the pipeline communicated with the upper end of the evaporator 11; a mother liquor buffer drain 26 is arranged in a pipeline at the liquid inlet side of the mother liquor buffer pump 24 and is communicated with the upper end of the third-stage heat exchanger 32.
Preferably, in the process of heat exchange in the secondary heat exchanger 22, the formed methanol vapor returns to the upper end of the primary heat exchanger 12 from the top end of the secondary heat exchanger 22, and the formed liquid medium-temperature methanol flows into the mother liquor buffer tank 21.
Preferably, the liquid medium temperature methanol in the mother liquor buffer tank 21 is respectively conveyed by the mother liquor buffer pump 24 in two paths, one path flows to the lower end of the primary heat exchanger 12 and flows into the distillate buffer tank 14, and the other path flows into the evaporator 11.
Preferably, the liquid medium-temperature methanol overflows into the mother liquor tank 4 through a mother liquor buffer overflow pipeline 23 to preheat the mother liquor.
Preferably, the liquid medium-temperature methanol is discharged through the mother liquor buffer pipe 26 to the upper end of the three-stage heat exchanger 32 for heat exchange.
In a preferable scheme, the upper end of a methanol collection tank 31 in the third-stage loop is connected with the lower end of a third-stage heat exchanger 32, the lower end of the methanol collection tank 31 is divided into two paths which are respectively communicated with a first methanol metering tank 33 and a second methanol metering tank 34, and the upper end of the third-stage heat exchanger 32 is communicated with a mother liquor tank 4. During use, in the heat exchange process of the third-stage heat exchanger 32, formed methanol vapor enters the mother liquor tank 4 from the upper end of the third-stage heat exchanger 32 to preheat mother liquor, formed liquid low-temperature methanol enters the methanol collection tank 31, and is discharged into the first methanol metering tank 33 and the second methanol metering tank 34 after reaching a set liquid level value.
In a preferable scheme, the lower end of the mother liquor tank 4 is communicated with a mother liquor pump 41, the outlet side of the mother liquor pump 41 is divided into two paths which are respectively communicated with the lower end of the tertiary heat exchanger 32 and the mother liquor buffer tank 21, and a mother liquor flowmeter 42 is arranged in a pipeline communicated with the mother liquor buffer tank 21. When the device is used, the mother liquor in the mother liquor tank 4 is respectively conveyed by the mother liquor pump 41 in two paths, one path is conveyed to the methanol collecting tank 31, and the other path is conveyed to the mother liquor buffer tank 21.
In a preferred embodiment, the lower ends of the first methanol metering tank 33 and the second methanol metering tank 34 are communicated through a double circulation pump 35, and the liquid outlet side of the double circulation pump 35 is communicated with the pipeline on the liquid inlet side of the mother liquor pump 41. When the device is used, the liquid low-temperature methanol in the first methanol metering tank 33 and the liquid low-temperature methanol in the second methanol metering tank 34 are conveyed to the liquid inlet side of the mother liquor pump 41 through the double-circulating pump 35, and then are respectively conveyed by the mother liquor pump 41 in two paths.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the utility model.
Claims (7)
1. A BP-3 mother liquor distillation heat recovery system for ultraviolet absorbent production, characterized by: the device comprises a primary loop, a secondary loop and a tertiary loop; an evaporator overflow pipeline (13) in the primary loop is communicated with a mother liquor buffer tank (21) of the secondary loop, the distillate buffer tank (14) and the primary heat exchanger (12) are communicated with a secondary heat exchanger (22), and the mother liquor buffer tank (21) is communicated with the primary heat exchanger (12) and the evaporator (11); a third heat exchanger (32) in the third loop is communicated with a distillation overflow pipeline (15) of a distillate buffer tank (14) and a mother liquor buffer tank (21), and a methanol collection tank (31) is communicated with the distillate buffer tank (14); the mother liquor tank (4) is communicated with a mother liquor buffer overflow pipeline (23) and the tertiary heat exchanger (32).
2. The BP-3 mother liquor distillation heat recovery system for ultraviolet absorbent production according to claim 1, wherein: the upper end of an evaporator (11) of the primary loop is communicated with the top end of a primary heat exchanger (12), and an evaporator overflow pipeline (13) is arranged on one side of the evaporator (11); the side surface of the evaporator (11) is also provided with a steam inlet pipe and a water delivery pipe, and the upper end and the lower end of the evaporator (11) are respectively provided with a liquid level meter and a slag discharge pipe.
3. The BP-3 mother liquor distillation heat recovery system for ultraviolet absorbent production according to claim 1, wherein: the lower end of the primary heat exchanger (12) is connected with the upper end of a distillate buffer tank (14), and a pipeline at one side and a pipeline at the lower end of the distillate buffer tank (14) are respectively communicated with the upper end and the lower end of a secondary heat exchanger (22); a distillation overflow pipeline (15) is arranged on one side of the distillate buffer tank (14) and communicated with the top end of the tertiary heat exchanger (32), a distillate pump (16) is arranged in a pipeline at the lower end of the distillate buffer tank (14), and a distillate discharge pipe (17) is arranged in a pipeline at the liquid inlet side of the distillate pump (16) and communicated with a methanol collection tank (31).
4. The BP-3 mother liquor distillation heat recovery system for ultraviolet absorbent production according to claim 1, wherein: the upper end of a mother liquor buffer tank (21) in the secondary loop is connected with the lower end of a secondary heat exchanger (22), and the top end of the secondary heat exchanger (22) is communicated with the upper end of a primary heat exchanger (12); a mother liquor buffer overflow pipeline (23) is arranged on one side of the mother liquor buffer tank (21); a pipeline at the lower end of the mother liquid buffer tank (21) is connected with a mother liquid buffer pump (24), the mother liquid buffer pump (24) is divided into two paths which are respectively communicated with the lower end of the primary heat exchanger (12) and the upper end of the evaporator (11), and a buffer flowmeter (25) is arranged in the pipeline communicated with the upper end of the evaporator (11); a mother liquor buffer drain pipe (26) is arranged in a pipeline at the liquid inlet side of the mother liquor buffer pump (24) and is communicated with the upper end of the third-stage heat exchanger (32).
5. The BP-3 mother liquor distillation heat recovery system for ultraviolet absorbent production according to claim 1, wherein: the upper end of a methanol collection tank (31) in the three-stage loop is connected with the lower end of a three-stage heat exchanger (32), the lower end of the methanol collection tank (31) is divided into two paths to be respectively communicated with a first methanol metering tank (33) and a second methanol metering tank (34), and the upper end of the three-stage heat exchanger (32) is communicated with a mother liquor tank (4).
6. The BP-3 mother liquor distillation heat recovery system for ultraviolet absorbent production according to claim 5, wherein: the lower end of the mother liquid tank (4) is communicated with a mother liquid pump (41), the outlet side of the mother liquid pump (41) is divided into two paths which are respectively communicated with the lower end of the tertiary heat exchanger (32) and the mother liquid buffer tank (21), and a mother liquid flowmeter (42) is arranged in a pipeline communicated with the mother liquid buffer tank (21).
7. The BP-3 mother liquor distillation heat recovery system for ultraviolet absorbent production according to claim 6, wherein: the lower ends of the first methanol metering tank (33) and the second methanol metering tank (34) are communicated through a double-circulating pump (35), and the liquid outlet side of the double-circulating pump (35) is communicated with a pipeline at the liquid inlet side of a mother liquid pump (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122659487.2U CN216592938U (en) | 2021-11-02 | 2021-11-02 | BP-3 mother liquor distillation heat recovery system for ultraviolet absorbent production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122659487.2U CN216592938U (en) | 2021-11-02 | 2021-11-02 | BP-3 mother liquor distillation heat recovery system for ultraviolet absorbent production |
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| Publication Number | Publication Date |
|---|---|
| CN216592938U true CN216592938U (en) | 2022-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122659487.2U Active CN216592938U (en) | 2021-11-02 | 2021-11-02 | BP-3 mother liquor distillation heat recovery system for ultraviolet absorbent production |
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| Country | Link |
|---|---|
| CN (1) | CN216592938U (en) |
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2021
- 2021-11-02 CN CN202122659487.2U patent/CN216592938U/en active Active
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