CN212575656U - Stripping waste liquid recovery system - Google Patents
Stripping waste liquid recovery system Download PDFInfo
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- CN212575656U CN212575656U CN202020846510.1U CN202020846510U CN212575656U CN 212575656 U CN212575656 U CN 212575656U CN 202020846510 U CN202020846510 U CN 202020846510U CN 212575656 U CN212575656 U CN 212575656U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The utility model provides a stripping waste liquid recovery system, which comprises a rectifying tower, a wiped film evaporator, a first heat exchanger, a second heat exchanger and a third heat exchanger; the wiped film evaporator is provided with a wiped film evaporator inlet, a wiped film evaporator first outlet and a wiped film evaporator second outlet; the first outlet of the wiped film evaporator is arranged at the top of the wiped film evaporator; a first outlet of the wiped film evaporator is communicated with a fourth inlet of the rectifying tower to form reflux; the second outlet of the wiped film evaporator is arranged at the bottom of the wiped film evaporator and is used for outputting heavy components; the first heating medium outlet of the first heat exchanger is used for outputting the intermediate component; the first outlet of the rectifying tower is communicated with the second heat exchanger and then divided into two paths, wherein one path is used for outputting light components. The utility model discloses use a rectifying column to accomplish the getting rid of light component and heavy ends in peeling off the waste liquid, process flow is short, and the pipeline is simple, and equipment is few, effectively reduces to take up an area of, reduces the vacuum pump load.
Description
Technical Field
The utility model relates to a useless organic solvent retrieves technical field, concretely relates to peel off waste liquid recovery system.
Background
In the photoelectric semiconductor industry, an organic solvent or an organic solvent aqueous solution is used for stripping the photoresist, and the used organic solvent or organic solvent aqueous solution is called stripping waste liquid. The stripping waste liquid is generally dissolved with less than 5 wt% of photoresist, and the photoresist can be separated out and attached to equipment and pipelines under the conditions of temperature rise and concentration, so that the normal operation of a stripping waste liquid recovery device is influenced.
The main components of the stripping waste liquid are MEA (monoethanolamine), BDG (2- (2-Butoxyyethoxy) ethanol, heavy components (mainly photoresist) and light components (mainly water). The stripping waste liquid recovery device is generally used at present and a reliable means is to remove light components and heavy components in the stripping waste liquid through rectification and recycle the remaining organic matters. The method for recycling the photoresist stripping liquid by using the CN105523598A as the staged pressure-change rectifying tower comprises the following specific steps: (1) adding activated carbon into the photoresist stripping solution for decoloring and adsorbing metal ions, and separating to obtain primary regenerated liquid; (2) the obtained primary regenerated liquid is rectified for four times under the protection of nitrogen atmosphere and antioxidant to obtain qualified photoresist stripping liquid, the rectification process used by the existing stripping waste liquid recovery device comprises 2 to 4 rectification towers, the occupied area after the recovery device is built is wide, a plurality of devices are provided, and pipelines are complex. The boiling point of the organic matter to be recovered and reused in the stripping waste liquid is high, the stripping waste liquid recovery device is required to be operated in a negative pressure state, and the boiling point of the organic matter is reduced by reducing the pressure, so that the pressure of steam for heating the reboiler is reduced. The rectification process adopting more than 2 rectification towers increases the volume of the stripping waste liquid recovery device, and requires a vacuum pump with higher power to be matched with the stripping waste liquid recovery device.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a peel off waste liquid recovery system to solve and peel off used rectification technology of waste liquid recovery unit among the prior art and contain 2 to 4 rectifying columns, establish the back area wide, equipment is many, and the pipeline is complicated, the big problem of vacuum pump load.
To achieve the above and other related objects, an embodiment of the present invention provides a stripping waste liquid recovery system, including a rectifying tower, a wiped film evaporator, a first heat exchanger, a second heat exchanger, and a third heat exchanger;
a vapor phase extraction unit is arranged in the rectifying tower; the rectifying tower is also provided with: the first inlet of the rectifying tower is arranged in the middle of the rectifying tower; the second inlet of the rectifying tower is arranged at the upper part of the rectifying tower; the third inlet of the rectifying tower is arranged at the lower part of the rectifying tower; the fourth inlet of the rectifying tower is arranged at the lower part of the rectifying tower; the first outlet of the rectifying tower is arranged at the top of the rectifying tower; the second outlet of the rectifying tower is arranged at the bottom of the rectifying tower;
the wiped film evaporator is provided with a wiped film evaporator inlet, a wiped film evaporator first outlet and a wiped film evaporator second outlet; the first outlet of the wiped film evaporator is arranged at the top of the wiped film evaporator; the first outlet of the wiped film evaporator is communicated with the fourth inlet of the rectifying tower to form reflux; the second outlet of the wiped film evaporator is arranged at the bottom of the wiped film evaporator and is used for outputting heavy components;
the first heat exchanger is provided with a first refrigerant inlet, a first refrigerant outlet, a first heat medium inlet and a first heat medium outlet, the first refrigerant inlet is used for introducing stripping waste liquid, the first refrigerant outlet is communicated with the first inlet of the rectifying tower, the vapor phase extraction unit is communicated with the first heat medium inlet, and the first heat medium outlet is used for outputting intermediate components;
the first outlet of the rectifying tower is communicated with the second heat exchanger and then divided into two paths: one passage is communicated with the second inlet of the rectifying tower to form reflux, and the other passage is used for outputting light components;
the second outlet of the rectifying tower is divided into two paths: a passage is communicated with a third inlet of the rectifying tower through the third heat exchanger to form reflux; the other passage is communicated with the inlet of the wiped film evaporator.
The stripping waste liquid recovery system uses one rectifying tower to remove light components and heavy components in the stripping waste liquid, has short process flow, simple pipelines and less equipment, and can effectively reduce the occupied area and reduce the load of a vacuum pump. The heavy components such as the photoresist and the like in the stripping waste liquid are concentrated from top to bottom in the rectifying tower and finally flow out after being gathered at the bottom of the wiped film evaporator, the whole system flow is short, the probability of the photoresist adhering to equipment and pipelines can be effectively reduced, and the continuous operation time of a stripping waste liquid recovery system is prolonged.
Preferably, the stripping waste liquid recovery system further comprises at least one of the following technical features:
1) the first pump and/or the first storage tank are/is arranged on a passage before the second heat exchanger is divided into two passages.
The first pump is used for pressurizing the introduced fluid and then dividing the pressurized fluid into two parts, wherein one part outputs light components, and the other part reflows to the rectifying tower. The first storage tank is used for buffering and storing the introduced fluid.
2) The heating device also comprises a second pump and/or a second storage tank, wherein the second pump and/or the second storage tank are arranged on a passage connected with the first heating medium outlet.
The second pump is used for pressurizing the introduced fluid and then outputting the intermediate component. The second storage tank is used for buffering and storing the introduced fluid.
Preferably, the stripping waste liquid recovery system further comprises at least one of the following technical features:
a) the heat exchanger also comprises a fourth heat exchanger, and the fourth heat exchanger is provided with a fourth heat exchanger gas-phase outlet and a fourth heat exchanger liquid-phase outlet;
the second heat exchanger is provided with a second heat exchanger gas-phase outlet and a second heat exchanger liquid-phase outlet;
the second heat exchanger vapor outlet is in communication with the fourth heat exchanger;
the liquid phase outlet of the fourth heat exchanger and the liquid phase outlet of the second heat exchanger are combined through a pipeline and then divided into two paths, or the liquid phase outlets of the fourth heat exchanger and the liquid phase outlets of the second heat exchanger are combined through a pipeline and then divided into two paths after passing through the first pump and/or the first storage tank;
the two paths are as follows: one passage is communicated with the second inlet of the rectifying tower to form reflux, and the other passage is used for outputting light components;
and the gas phase outlet of the fourth heat exchanger is used for outputting non-condensable gas.
The second heat exchanger gas phase outlet is communicated with the fourth heat exchanger and used for condensing the introduced fluid, and the second heat exchanger liquid phase outlet is used for outputting the condensed liquid. The fourth heat exchanger is used for further condensing the introduced fluid, a liquid phase outlet of the fourth heat exchanger is used for outputting condensed liquid, and the condensed liquid can flow back to the rectifying tower for further rectification treatment; and the gas-phase outlet of the fourth heat exchanger is used for outputting non-condensable gas, and the non-condensable gas is discharged, so that the treatment effect of the system is further improved.
b) The heat exchanger also comprises a fifth heat exchanger, and the fifth heat exchanger is provided with a fifth heat exchanger gas-phase outlet and a fifth heat exchanger liquid-phase outlet;
the first heat medium outlet is provided with a first heat medium gas phase outlet and a first heat medium liquid phase outlet;
the first heat medium gas phase outlet is communicated with the fifth heat exchanger;
the liquid phase outlet of the fifth heat exchanger and the liquid phase outlet of the first heating medium are combined through a pipeline and then output an intermediate component, or the liquid phase outlet of the fifth heat exchanger and the liquid phase outlet of the first heating medium are combined through a pipeline and then output an intermediate component after passing through the second pump and/or the second storage tank;
and the gas phase outlet of the fifth heat exchanger is used for outputting non-condensable gas.
And the first heat medium gas phase outlet is communicated with the fifth heat exchanger and is used for condensing the introduced fluid, and the first heat medium liquid phase outlet is used for outputting the condensed liquid. The fifth heat exchanger is used for further condensing the introduced fluid, a liquid phase outlet of the fifth heat exchanger is used for outputting condensed liquid, and the condensed liquid is an intermediate component and can be further recycled; and a gas-phase outlet of the fifth heat exchanger is used for outputting non-condensable gas, and the non-condensable gas is discharged, so that the treatment effect of the system is further improved.
More preferably, the stripping waste liquid recovery system further comprises at least one of the following technical features:
11) the device is characterized in that 1), the device also comprises a fourth heat exchanger, and the fourth heat exchanger is provided with a fourth heat exchanger gas-phase outlet and a fourth heat exchanger liquid-phase outlet;
the first storage tank is also provided with a first storage tank gas phase outlet;
the first storage tank gas-phase outlet is communicated with the fourth heat exchanger, the fourth heat exchanger liquid-phase outlet is communicated with the first storage tank, and the fourth heat exchanger gas-phase outlet is used for outputting non-condensable gas.
The first storage tank is used for gas-liquid separation, and the separated gas phase is discharged from a gas phase outlet of the first storage tank. The fourth heat exchanger is used for further condensing the introduced fluid, the condensed liquid can flow back to the rectifying tower for further rectification treatment, the non-condensable gas is discharged, and the treatment effect of the system is further improved. And the gas-phase outlet of the fourth heat exchanger is used for outputting non-condensable gas, and the liquid-phase outlet of the fourth heat exchanger is used for outputting condensed liquid.
21) In the characteristic 2), the heat exchanger further comprises a fifth heat exchanger, and the fifth heat exchanger is provided with a fifth heat exchanger gas-phase outlet and a fifth heat exchanger liquid-phase outlet;
the second storage tank is also provided with a second storage tank gas phase outlet;
the gas-phase outlet of the second storage tank is communicated with the fifth heat exchanger, the liquid-phase outlet of the fifth heat exchanger is communicated with the second storage tank, and the gas-phase outlet of the fifth heat exchanger is used for outputting non-condensable gas.
The second storage tank is used for gas-liquid separation, and the separated gas phase is discharged from a gas phase outlet of the second storage tank. The fifth heat exchanger is used for further condensing the introduced fluid, the condensed liquid can be further recycled, the non-condensable gas is discharged, and the treatment effect of the system is further improved. And the gas-phase outlet of the fifth heat exchanger is used for outputting non-condensable gas, and the liquid-phase outlet of the fifth heat exchanger is used for outputting condensed liquid.
Preferably, the stripping waste liquid recovery system further comprises at least one of the following technical features:
1) the device also comprises a third pump, wherein the third pump is arranged at the first outlet of the rectifying tower and/or on the passage of the vapor phase extraction unit. The third pump is used for maintaining the vacuum degree of the stripping waste liquid recovery system.
2) The rectifying tower further comprises a third storage tank and a third pump which are communicated, and the third pump and the third storage tank are arranged on a passage of the first outlet of the rectifying tower.
The third storage tank is a vacuum buffer tank and is used for stabilizing the pressure (vacuum degree) of the stripping waste liquid recovery system. In order to effectively control the working pressure, inert gas can be introduced, when the pressure is too low, the inert gas is supplemented to the stripping waste liquid recovery system, and the pressure is properly increased.
3) The vapor phase extraction device also comprises a fourth storage tank and a third pump which are communicated, wherein the third pump and the fourth storage tank are arranged on the passage of the vapor phase extraction unit.
The fourth storage tank is a vacuum buffer tank and is used for stably stripping the pressure of the waste liquid recovery system. In order to effectively control the working pressure, inert gas can be introduced, when the pressure is too low, the inert gas is supplemented to the stripping waste liquid recovery system, and the pressure is properly increased.
Preferably, the stripping waste liquid recovery system further comprises a fourth pump, and the second outlet of the rectifying tower is communicated with the fourth pump and then divided into two paths: a passage is communicated with a third inlet of the rectifying tower through the third heat exchanger to form reflux; the other passage is communicated with the inlet of the wiped film evaporator. And the fourth pump is used for pressurizing and inputting the inlet fluid to the third heat exchanger and the wiped film evaporator.
Preferably, the stripping waste liquid recovery system further comprises a fifth storage tank and/or a fifth pump;
the fifth storage tank and/or the fifth pump are/is arranged on a passage connected with the first refrigerant inlet.
The fifth storage tank is used for storing the stripping waste liquid. The fifth pump is used to pressurize the stripping waste liquid for input to the next device.
Preferably, the stripping waste liquid recovery system further comprises a sixth storage tank and/or a sixth pump;
the sixth storage tank and/or the sixth pump are/is arranged on a passage connected with the second outlet of the wiped film evaporator.
The sixth tank is used for storing the heavy fraction. The sixth pump is used for pressurizing and outputting the heavy component.
Preferably, the stripping waste liquid recovery system further comprises at least one of the following technical features:
1) the rectifying tower is a filler rectifying tower or a plate-type rectifying tower.
2) The third heat exchanger is a falling film evaporator, a siphon reboiler or a kettle reboiler.
3) The first inlet of the rectifying tower is positioned above the vapor phase extraction unit.
More preferably, in the feature 3), the height of the packing between the first inlet of the rectifying tower and the vapor-phase extracting unit is 1m to 6m, or a plurality of stages of trays having a separation effect equivalent to the height of the packing of 1m to 6m are provided between the first inlet of the rectifying tower and the vapor-phase extracting unit. The separation of light components and heavy components in the stripping waste liquid is facilitated.
The above-mentioned non-condensable gas means gas in which dissolved air in the material, air leaked from the joint into the system, etc. cannot be condensed under the operating conditions.
The technical scheme has the following technical effects:
1) the stripping waste liquid recovery system provided by the embodiment of the utility model uses a rectifying tower to remove light components and heavy components in the stripping waste liquid, has short process flow, simple pipelines and less equipment, and can effectively reduce the occupied area and reduce the load of a vacuum pump;
2) the embodiment of the utility model provides a make among the stripping waste liquid heavy component such as photoresist glue down concentrate from last in the rectifying column, finally flow after the wiped film evaporator bottom assembles, whole flow is short, can effectively reduce photoresist glue adnexed probability on equipment and pipeline, improves and peels off waste liquid recovery system continuous operation time.
Drawings
Fig. 1 is a schematic view of a waste liquid recovery system according to a first embodiment of the present invention.
Fig. 2 is a schematic view of a waste liquid recovery system according to a second embodiment of the present invention.
Fig. 3 is a schematic view of a stripping waste liquid recovery system according to a third embodiment of the present invention.
Fig. 4 is a schematic view of a stripping waste liquid recovery system according to a fourth embodiment of the present invention.
Reference numerals
10 rectifying tower
11 vapor phase extraction unit
12 first inlet of rectifying tower
13 second inlet of rectifying tower
14 third inlet of rectifying tower
15 fourth inlet of rectifying tower
16 first outlet of rectifying tower
17 second outlet of rectifying tower
20 film-scraping evaporator
21 wiped film evaporator inlet
22 first outlet of wiped film evaporator
Second outlet of 23-film evaporator
30 first heat exchanger
311 first refrigerant inlet
312 first refrigerant outlet
321 first heating medium inlet
322 first heating medium outlet
3221 the first heat medium gas phase outlet
3222A first liquid phase outlet for heating medium
40 second heat exchanger
41 gas phase outlet of second heat exchanger
42 second heat exchanger liquid phase outlet
50 third Heat exchanger
60 first pump
70 first storage tank
71 gas phase outlet of first storage tank
80 second pump
90 second storage tank
91 gas phase outlet of second storage tank
100 fourth heat exchanger
101 gas phase outlet of fourth heat exchanger
102 liquid phase outlet of the fourth heat exchanger
110 fifth heat exchanger
111 gas phase outlet of fifth heat exchanger
112 liquid phase outlet of fifth heat exchanger
120 third pump
130 third storage tank
140 fourth storage tank
150 fourth pump
160 fifth storage tank
170 fifth pump
180 sixth storage tank
190 sixth pump
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
As shown in fig. 1, a first embodiment of the present invention provides a stripping waste liquid recovery system, including a rectifying tower 10, a wiped film evaporator 20, a first heat exchanger 30, a second heat exchanger 40, and a third heat exchanger 50;
a vapor phase extraction unit 11 is arranged in the rectifying tower 10; the rectifying column 10 is further provided with: the first inlet 12 of the rectifying tower is arranged in the middle of the rectifying tower 10; the second inlet 13 of the rectifying tower is arranged at the upper part of the rectifying tower 10; a third inlet 14 of the rectifying tower, which is arranged at the lower part of the rectifying tower 10; the fourth inlet 15 of the rectifying tower is arranged at the lower part of the rectifying tower 10; a rectifying tower first outlet 16 arranged at the top of the rectifying tower 10; a second outlet 17 of the rectifying tower, which is arranged at the bottom of the rectifying tower 10;
the wiped film evaporator 20 is provided with a wiped film evaporator inlet 21, a wiped film evaporator first outlet 22 and a wiped film evaporator second outlet 23; the wiped film evaporator first outlet 22 is arranged at the top of the wiped film evaporator 20; the first outlet 22 of the wiped film evaporator is communicated with the fourth inlet 15 of the rectifying tower to form reflux; the second outlet 23 of the wiped film evaporator is arranged at the bottom of the wiped film evaporator 20 and is used for outputting heavy components;
the first heat exchanger 30 is provided with a first refrigerant inlet 311, a first refrigerant outlet 312, a first heating medium inlet 321 and a first heating medium outlet 322, the first refrigerant inlet 311 is used for introducing stripping waste liquid, the first refrigerant outlet 312 is communicated with the first inlet 12 of the rectifying tower, the vapor phase extraction unit 11 is communicated with the first heating medium inlet 321, and the first heating medium outlet 322 is used for outputting intermediate components;
the first outlet 16 of the rectifying tower is communicated with the second heat exchanger 40 and then divided into two paths: one passage is communicated with the second inlet 13 of the rectifying tower to form reflux, and the other passage is used for outputting light components;
the second outlet 17 of the rectifying tower is divided into two paths: a path is communicated with the third inlet 14 of the rectifying tower through the third heat exchanger 50 to form reflux; the other passage communicates with the wiped film evaporator inlet 21.
The stripping waste liquid recovery system of the embodiment uses one rectifying tower 10 to remove light components and heavy components in the stripping waste liquid, has short process flow, simple pipelines and less equipment, and can effectively reduce the occupied area and reduce the load of a vacuum pump. The heavy components such as the photoresist and the like in the stripping waste liquid are concentrated from top to bottom in the rectifying tower 10 and finally flow out after being gathered at the bottom of the wiped film evaporator 20, the whole system flow is short, the probability of the photoresist adhering to equipment and pipelines can be effectively reduced, and the continuous operation time of a stripping waste liquid recovery system is prolonged.
When the stripping waste liquid recovery system is used, the stripping waste liquid is introduced into the first refrigerant inlet 311 of the first heat exchanger 30, the vapor phase extracted by the vapor phase extraction unit 11 of the rectifying tower 10 is introduced into the first heat medium inlet 321 of the first heat exchanger 30, and the stripping waste liquid and the vapor phase extracted by the vapor phase extraction unit 11 are subjected to heat exchange treatment by the first heat exchanger 30 to provide intermediate components and the heated stripping waste liquid; introducing the heated stripping waste liquid into a rectifying tower 10 through a first inlet 12 of the rectifying tower 10 for rectification, obtaining a tower top stream from a first outlet 16 of the rectifying tower, and obtaining a tower bottom stream from a second outlet 17 of the rectifying tower; the overhead stream is condensed by the second heat exchanger 40 and divided into two portions: one part of the light components flows back to the rectifying tower 10, and the other part of the light components flows back to the rectifying tower; the bottom stream is divided into two parts: one part of the waste water is subjected to heat exchange by the third heat exchanger 50 and then flows back to the rectifying tower 10, and the other part of the waste water is subjected to evaporation treatment by the wiped film evaporator 20 and then is divided into two parts: one part of the heavy components flows back to the rectifying tower 10, and the other part of the heavy components is output.
The rectifying tower 10 is a packed rectifying tower or a plate-type rectifying tower, preferably a packed rectifying tower, and is more beneficial to separation of light components and heavy components in the stripping waste liquid. Fig. 1 shows a packing rectification column, and the liquid distributor of the packing rectification column may be a tray-type liquid distributor, a narrow-trough type liquid distributor, or other existing liquid distributors, and can meet the liquid distribution requirement.
The rectifying tower first inlet 12 is located above the vapor phase extraction unit 11. The height of the packing between the first inlet 12 of the rectifying tower and the vapor phase extraction unit 11 is 1 m-6 m, or a plurality of layers of tower plates with the same separation effect as the height of the packing of 1 m-6 m are arranged between the first inlet 12 of the rectifying tower and the vapor phase extraction unit 11. The separation of light components and heavy components in the stripping waste liquid is facilitated.
The third heat exchanger 50 can be a falling film evaporator, a siphon reboiler or a kettle reboiler, preferably a falling film evaporator, and has good heat exchange effect and short heating time.
As shown in fig. 2, in a preferred second embodiment, the stripping waste liquid recovery system may further include a first pump 60 and/or a first storage tank 70, and the first pump 60 and/or the first storage tank 70 may be provided on a path before the second heat exchanger 40 is divided into two paths. Specifically, the following connection means may be available:
the first outlet 16 of the rectifying tower is sequentially communicated with the first pump 60 through the second heat exchanger 40 and then divided into two paths;
or, the first outlet 16 of the rectifying tower is sequentially communicated with the first storage tank 70 through the second heat exchanger 40 and then divided into two paths;
or, the first outlet 16 of the rectifying tower is sequentially communicated with the second heat exchanger 40, the first storage tank 70 and the first pump 60 and then divided into two paths;
the two paths are: one path is communicated with the second inlet 13 of the rectifying tower to form reflux, and the other path is used for outputting light components.
The first pump 60 is used for pressurizing the introduced fluid and dividing the pressurized fluid into two parts, wherein one part outputs light components, and the other part flows back to the rectifying tower. The first reservoir 70 is used to buffer and store incoming fluid.
As shown in fig. 3, in a preferred third embodiment, the stripping waste liquid recovery system may further include a fourth heat exchanger 100, the fourth heat exchanger 100 being provided with a fourth heat exchanger gas phase outlet 101 and a fourth heat exchanger liquid phase outlet 102;
the second heat exchanger 40 is provided with a second heat exchanger gas phase outlet 41 and a second heat exchanger liquid phase outlet 42;
the second heat exchanger gas phase outlet 41 communicates with the fourth heat exchanger 100;
the fourth heat exchanger liquid phase outlet 102 and the second heat exchanger liquid phase outlet 42 are combined by a pipeline and then divided into two paths or combined by a pipeline and then divided into two paths after passing through the first pump 60 and/or the first storage tank 70;
the two paths are: one passage is communicated with the second inlet 13 of the rectifying tower to form reflux, and the other passage is used for outputting light components;
the fourth heat exchanger gas phase outlet 101 is used for outputting non-condensable gas.
The fourth heat exchanger liquid phase outlet 102 and the second heat exchanger liquid phase outlet 42 are combined through a pipeline, and then are divided into two paths after passing through the first pump 60 and/or the first storage tank 70, and specifically, the following connection modes can be adopted:
the fourth heat exchanger liquid phase outlet 102 and the second heat exchanger liquid phase outlet 42 are combined through a pipeline, communicated through the first pump 60 and then divided into two passages;
or, the fourth heat exchanger liquid phase outlet 102 and the second heat exchanger liquid phase outlet 42 are combined through a pipeline, communicated through the first storage tank 70 and then divided into two passages;
alternatively, the fourth heat exchanger liquid phase outlet 102 and the second heat exchanger liquid phase outlet 42 may be combined via a pipe and then communicated in sequence via the first storage tank 70 and the first pump 60, and then divided into two paths.
The second heat exchanger 40 may be a dividing wall heat exchanger, such as a shell and tube heat exchanger, with a second heat exchanger vapor outlet 41 in communication with the fourth heat exchanger 100 for condensing the incoming fluid and a second heat exchanger liquid outlet 42 for outputting the condensed liquid. The fourth heat exchanger 100 may be a dividing wall type heat exchanger, such as a shell-and-tube type heat exchanger, the fourth heat exchanger 100 is configured to further condense the introduced fluid, the fourth heat exchanger liquid phase outlet 102 is configured to output condensed liquid, and the condensed liquid may flow back to the rectifying tower for further rectification; the fourth heat exchanger gas phase outlet 101 is used for outputting non-condensable gas, and the non-condensable gas is discharged, so that the treatment effect of the system is further improved.
As shown in fig. 4, in a preferred fourth embodiment, the stripping waste liquid recovery system may further include a fourth heat exchanger 100, the fourth heat exchanger 100 being provided with a fourth heat exchanger gas phase outlet 101 and a fourth heat exchanger liquid phase outlet 102;
the first storage tank 70 is also provided with a first storage tank gas phase outlet 71;
the first tank gas phase outlet 71 is communicated with a fourth heat exchanger 100, the fourth heat exchanger liquid phase outlet 102 is communicated with the first tank 70, and the fourth heat exchanger gas phase outlet 101 is used for outputting non-condensable gas.
The first tank 70 is used for gas-liquid separation, and the separated gas phase is discharged from a first tank gas phase outlet 71. The fourth heat exchanger 100 is used for further condensing the introduced fluid, the condensed liquid can flow back to the rectifying tower 10 for further rectification treatment, and the non-condensable gas is discharged, so that the treatment effect of the system is further improved. The fourth heat exchanger 100 may be a dividing wall heat exchanger, such as a shell-and-tube heat exchanger, and the gas outlet 101 of the fourth heat exchanger is used for outputting non-condensable gas, and the liquid outlet 102 of the fourth heat exchanger is used for outputting condensed liquid.
As shown in fig. 2, in a preferred second embodiment, the stripping waste liquid recovery system may further include a second pump 80 and/or a second storage tank 90, and the second pump 80 and/or the second storage tank 90 may be provided on a path connected to the first heating medium outlet 322. Specifically, the following connection means may be available:
the first heating medium outlet 322 is communicated with the second pump 80 to output the intermediate component from the second pump 80;
alternatively, first heating medium outlet 322 is in communication with second reservoir 90 for outputting the intermediate component from second reservoir 90;
alternatively, the first heating medium outlet 322 outputs the intermediate component from the second pump 80 via the second storage tank 90 and the second pump 80 in sequence.
The second pump 80 is used to pressurize the incoming fluid to output the intermediate component. The second reservoir 90 is used to buffer and store the incoming fluid.
As shown in fig. 3, in a preferred third embodiment, the stripping waste liquid recovery system may further include a fifth heat exchanger 110, the fifth heat exchanger 110 being provided with a fifth heat exchanger gas phase outlet 111 and a fifth heat exchanger liquid phase outlet 112;
the first heat medium outlet 322 is provided with a first heat medium gas phase outlet 3221 and a first heat medium liquid phase outlet 3222;
the first heat medium gas phase outlet 3221 communicates with the fifth heat exchanger 110;
the fifth heat exchanger liquid phase outlet 112 and the first heat medium liquid phase outlet 3222 are combined through a pipeline and then output an intermediate component, or are combined through a pipeline and then output an intermediate component after passing through the second pump 80 and/or the second storage tank 90;
the fifth heat exchanger gas phase outlet 111 is used for outputting non-condensable gas.
The fifth heat exchanger liquid phase outlet 112 and the first heat medium liquid phase outlet 3222 are combined through a pipeline, and output an intermediate component after passing through the second pump 80 and/or the second storage tank 90, specifically, the following connection modes can be adopted:
the fifth heat exchanger liquid phase outlet 112 and the first heat medium liquid phase outlet 3222 are combined through a pipeline and then communicated with the second pump 80, and the intermediate component is output from the second pump 80;
or, the fifth heat exchanger liquid phase outlet 112 and the first heat medium liquid phase outlet 3222 are combined through a pipeline and then communicated with the second storage tank 90, and the intermediate component is output from the second storage tank 90;
alternatively, the fifth heat exchanger liquid phase outlet 112 and the first heat medium liquid phase outlet 3222 are combined by a pipe and then sequentially pass through the second storage tank 90 and the second pump 80, and the intermediate component is output from the second pump 80.
The first heat exchanger 30 may be a dividing wall type heat exchanger, such as a shell-and-tube type heat exchanger, the first heat medium gas phase outlet 3221 is communicated with the fifth heat exchanger 110 for condensing the introduced fluid, and the first heat medium liquid phase outlet 3222 is used for outputting the condensed liquid. The fifth heat exchanger 110 may be a dividing wall type heat exchanger, such as a shell-and-tube type heat exchanger, the fifth heat exchanger 110 is used for further condensing the introduced fluid, the liquid phase outlet 112 of the fifth heat exchanger is used for outputting the condensed liquid, and the condensed liquid is an intermediate component, and can be further recycled; and the gas-phase outlet 111 of the fifth heat exchanger is used for outputting non-condensable gas, and the non-condensable gas is discharged, so that the treatment effect of the system is further improved.
As shown in fig. 4, in a preferred fourth embodiment, the stripping waste liquid recovery system may further include a fifth heat exchanger 110, the fifth heat exchanger 110 being provided with a fifth heat exchanger gas phase outlet 111 and a fifth heat exchanger liquid phase outlet 112;
the second storage tank 90 is also provided with a second storage tank gas phase outlet 91;
the second storage tank gas phase outlet 91 is communicated with the fifth heat exchanger 110, the fifth heat exchanger liquid phase outlet 112 is communicated with the second storage tank 90, and the fifth heat exchanger gas phase outlet 111 is used for outputting non-condensable gas.
The second storage tank 90 is used for gas-liquid separation, and the separated gas phase is discharged from a second storage tank gas phase outlet 91. The fifth heat exchanger 110 is used for further condensing the introduced fluid, the condensed liquid can be further recycled, and the non-condensable gas is discharged, so that the treatment effect of the system is further improved. The fifth heat exchanger 110 may be a dividing wall type heat exchanger, such as a shell-and-tube type heat exchanger, and the fifth heat exchanger gas phase outlet 111 is used for outputting non-condensable gas, and the fifth heat exchanger liquid phase outlet 112 is used for outputting condensed liquid.
In a preferred embodiment, the stripping waste liquid recovery system may further include a third pump 120, and the third pump 120 is provided at the first outlet 16 of the rectifying tower and/or at the passage of the vapor phase withdrawing unit 11.
The third pump 120 is disposed on the path of the first outlet 16 of the rectifying tower, and specifically, the following connection modes can be provided:
the second heat exchanger 40 is in communication with a third pump 120;
alternatively, the first reservoir 70 is in communication with the third pump 120;
alternatively, the fourth heat exchanger gas phase outlet 101 is in communication with the third pump 120.
The third pump 120 is provided in the path of the vapor phase extraction unit 11, and specifically, there may be a connection manner as follows:
the first heat exchanger 30 is in communication with the third pump 120;
alternatively, the second reservoir 90 is in communication with a third pump 120;
alternatively, the fifth heat exchanger gas-phase outlet 111 is in communication with the third pump 120.
The third pump 120 is provided in various combinations on the passage of the first outlet 16 of the rectifying tower and the passage of the vapor-phase extracting unit 11, and specifically, there may be the following connection modes:
the second heat exchanger 40 is in communication with the third pump 120, and the first heat exchanger 30 is in communication with the third pump 120;
alternatively, the first reservoir 70 is in communication with the third pump 120, the second reservoir 90 is in communication with the third pump 120, and so on.
The third pump 120 is used to maintain the vacuum degree of the stripping waste liquid recovery system.
In a preferred embodiment, the stripping waste liquid recovery system further comprises a third storage tank 130 and a third pump 120 which are communicated with each other, and the third pump 120 and the third storage tank 130 are disposed on the path of the first outlet 16 of the rectifying tower.
The third pump 120 is connected to the third storage tank 130 and then disposed on the path of the first outlet 16 of the rectifying tower, and specifically, the following connection modes may be adopted:
the second heat exchanger 40 is in communication with the third pump 120 via a third storage tank 130;
alternatively, the first reservoir 70 is in communication with the third pump 120 via the third reservoir 130;
alternatively, the fourth heat exchanger gas phase outlet 101 is in communication with the third pump 120 via the third storage tank 130.
The third tank 130 is provided with a third tank inert gas inlet for supplementing the stripping waste recovery system with inert gas to adjust the pressure. The third storage tank 130 is a vacuum buffer tank for stabilizing the pressure (vacuum degree) of the stripping waste liquid recovery system. In order to effectively control the working pressure, an inert gas may be introduced, when the pressure is too low, the inert gas may be supplemented to the stripping waste liquid recovery system, the pressure may be appropriately increased, and an inlet point of the inert gas may be disposed at the top of the third storage tank 130Can be introduced into N2An inert gas. The utility model discloses operating pressure when implementing (being the rectifying column top pressure promptly) is the negative pressure, and absolute pressure is not more than 20kPa, and preferred be not more than 15kPa, more preferably be not more than 10kPa, and be not less than 100Pa, preferred be not less than 200 Pa.
In a preferred embodiment, the stripping waste liquid recovery system may further include a fourth tank 140 and a third pump 120 which are communicated with each other, and the third pump 120 and the fourth tank 140 are provided in a passage of the vapor phase extracting unit 11.
The third pump 120 and the fourth storage tank 140 are provided in the path of the vapor phase extraction unit 11, and specifically, there may be a connection manner as follows:
the first heat exchanger 30 is in communication with the third pump 120 via a fourth storage tank 140;
alternatively, the second reservoir 90 is in communication with the third pump 120 via a fourth reservoir 140;
alternatively, the fifth heat exchanger gas-phase outlet 111 is communicated with the third pump 120 via the fourth storage tank 140.
The fourth tank 140 is provided with a fourth tank inert gas inlet for supplementing the stripping waste recovery system with inert gas to adjust the pressure. The fourth storage tank 140 is a vacuum buffer tank for stabilizing the pressure of the stripping waste liquid recovery system. The pressure of the fourth storage tank 140 is controlled by the third pump 120 to control the pressure of the second storage tank 90, thereby controlling the pressure in the pipe from the vapor phase withdrawing unit 11 to the first heat exchanger 30, and finally controlling the flow rate of the vapor phase withdrawn from the vapor phase withdrawing unit 11. In order to effectively control the working pressure, an inert gas may be introduced, when the pressure is too low, the inert gas may be supplemented to the stripping waste liquid recovery system, the pressure may be appropriately increased, an inlet point of the inert gas may be disposed at the top of the fourth storage tank 140, and N may be introduced2An inert gas. The utility model discloses operating pressure when implementing (being the rectifying column top pressure promptly) is the negative pressure, and absolute pressure is not more than 20kPa, and preferred be not more than 15kPa, more preferably be not more than 10kPa, and be not less than 100Pa, preferred be not less than 200 Pa.
In a preferred embodiment, the stripping waste liquid recovery system may further include a fourth pump 150, and the second outlet 17 of the rectifying tower is connected to the fourth pump 150 and then divided into two paths: a path is communicated with the third inlet 14 of the rectifying tower through the third heat exchanger 50 to form reflux; the other passage communicates with the wiped film evaporator inlet 21. A fourth pump 150 is used to pressurize the feed fluid for input to the third heat exchanger 50 and the wiped film evaporator 20.
The stripping waste recovery system may further include a fifth storage tank 160 and/or a fifth pump 170;
the fifth accumulator 160 and/or the fifth pump 170 are provided on a passage connected to the first refrigerant inlet 311.
The fifth accumulator 160 and/or the fifth pump 170 are disposed on a path connecting the first refrigerant inlet 311, and specifically, the following connection modes may be provided:
the fifth storage tank 160 is communicated with the first refrigerant inlet 311;
alternatively, the fifth pump 170 is communicated with the first refrigerant inlet 311;
alternatively, the fifth accumulator 160 is communicated with the first refrigerant inlet 311 through the fifth pump 170.
The fifth tank 160 is used to store the stripping waste liquid. The fifth pump 170 is used to pressurize and feed the stripping waste liquid to the next apparatus.
The stripping waste recovery system may further include a sixth storage tank 180 and/or a sixth pump 190;
a sixth reservoir 180 and/or a sixth pump 190 is provided on the path connecting the second outlet 23 of the wiped film evaporator.
The sixth storage tank 180 and/or the sixth pump 190 are/is provided on a path connecting the second outlet 23 of the wiped film evaporator, and specifically, the following connection modes can be provided:
the second outlet 23 of the wiped film evaporator is communicated with the sixth storage tank 180;
alternatively, the wiped film evaporator second outlet 23 is in communication with the sixth pump 190;
alternatively, the wiped film evaporator second outlet 23 is in communication with a sixth pump 190 via a sixth reservoir 180.
A sixth storage tank 180 is used to store the heavy fraction. The sixth pump 190 is used to pressurize the heavy ends output.
As shown in fig. 4, a fourth embodiment of the present invention provides a preferred stripping waste liquid recovery system, which includes a rectifying tower 10, a wiped film evaporator 20, a first heat exchanger 30, a second heat exchanger 40, a third heat exchanger 50, a first pump 60, a first storage tank 70, a second pump 80, a second storage tank 90, a fourth heat exchanger 100, a fifth heat exchanger 110, a third pump 120, a third storage tank 130, a fourth storage tank 140, a fourth pump 150, a fifth storage tank 160, a fifth pump 170, a sixth storage tank 180, and a sixth pump 190;
a vapor phase extraction unit 11 is arranged in the rectifying tower 10; the rectifying column 10 is further provided with: the first inlet 12 of the rectifying tower is arranged in the middle of the rectifying tower 10; the second inlet 13 of the rectifying tower is arranged at the upper part of the rectifying tower 10; a third inlet 14 of the rectifying tower, which is arranged at the lower part of the rectifying tower 10; the fourth inlet 15 of the rectifying tower is arranged at the lower part of the rectifying tower 10; a rectifying tower first outlet 16 arranged at the top of the rectifying tower 10; a second outlet 17 of the rectifying tower, which is arranged at the bottom of the rectifying tower 10;
the wiped film evaporator 20 is provided with a wiped film evaporator inlet 21, a wiped film evaporator first outlet 22 and a wiped film evaporator second outlet 23; the wiped film evaporator first outlet 22 is arranged at the top of the wiped film evaporator 20; the first outlet 22 of the wiped film evaporator is communicated with the fourth inlet 15 of the rectifying tower to form reflux; the second outlet 23 of the wiped film evaporator is arranged at the bottom of the wiped film evaporator 20 and is used for outputting heavy components;
the first heat exchanger 30 is provided with a first refrigerant inlet 311, a first refrigerant outlet 312, a first heating medium inlet 321 and a first heating medium outlet 322;
the first storage tank 70 is also provided with a first storage tank gas phase outlet 71;
the second storage tank 90 is also provided with a second storage tank gas phase outlet 91;
the fourth heat exchanger 100 is provided with a fourth heat exchanger gas phase outlet 101 and a fourth heat exchanger liquid phase outlet 102; the fifth heat exchanger 110 is provided with a fifth heat exchanger gas phase outlet 111 and a fifth heat exchanger liquid phase outlet 112;
the fifth storage tank 160 for storing the stripping waste liquid is communicated with the first refrigerant inlet 311 through the fifth pump 170, the first refrigerant outlet 312 is communicated with the first inlet 12 of the rectifying tower, the vapor phase extraction unit 11 is communicated with the first heat medium inlet 321, the first heat medium outlet 322 is communicated with the second pump 80 through the second storage tank 90, and the intermediate component is output from the second pump 80; the second storage tank gas phase outlet 91 is communicated with the fifth heat exchanger 110, the fifth heat exchanger liquid phase outlet 112 is communicated with the second storage tank 90, and the fifth heat exchanger gas phase outlet 111 is communicated with the third pump 120 through the fourth storage tank 140; the non-condensable gas is output from the gas phase outlet 111 of the fifth heat exchanger, and only a small part of air generated by leakage of the non-condensable gas passes through the fourth storage tank 140 and the third pump 120 in sequence through the pipeline and is discharged to the waste gas treatment system.
The first outlet 16 of the rectifying tower is sequentially communicated with the second heat exchanger 40, the first storage tank 70 and the first pump 60 and then divided into two paths; the two paths are: one passage is communicated with the second inlet 13 of the rectifying tower to form reflux, and the other passage is used for outputting light components; the first storage tank gas phase outlet 71 is communicated with the fourth heat exchanger 100, the fourth heat exchanger liquid phase outlet 102 is communicated with the first storage tank 70, and the fourth heat exchanger gas phase outlet 101 is communicated with the third pump 120 through the third storage tank 130; the non-condensable gas is output from the gas phase outlet 101 of the fourth heat exchanger, and only a small part of air generated by leakage of the non-condensable gas passes through the third storage tank 130 and the third pump 120 in sequence through the pipeline and is discharged to the waste gas treatment system.
The second outlet 17 of the rectifying tower is communicated with a fourth pump 150 and then divided into two paths: a path is communicated with the third inlet 14 of the rectifying tower through the third heat exchanger 50 to form reflux; the other passage is communicated with an inlet 21 of the wiped film evaporator, and a first outlet 22 of the wiped film evaporator is communicated with a fourth inlet 15 of the rectifying tower to form reflux; the second outlet 23 of the wiped film evaporator is communicated with a sixth pump 190 through a sixth storage tank 180, and heavy components are output from the sixth pump 190;
the rectifying tower 10 is a packed rectifying tower, the third heat exchanger 50 is a falling film evaporator, the first inlet 12 of the rectifying tower is positioned above the vapor phase extraction unit 11, the height of the packing between the first inlet 12 of the rectifying tower and the vapor phase extraction unit 11 is 1-6 m, the third storage tank 130 is provided with a third storage tank inert gas inlet for supplementing inert gas to the stripping waste liquid recovery system so as to adjust the pressure, and the fourth storage tank 140 is provided with a fourth storage tank inert gas inlet for supplementing inert gas to the stripping waste liquid recovery system so as to adjust the pressure.
When the preferred stripping waste liquid recovery system is in use, the stripping waste liquid stored in the fifth storage tank 160 is pumped into the first refrigerant inlet 311 of the first heat exchanger 30 through the fifth pump 170, the vapor phase extracted by the vapor phase extraction unit 11 of the rectifying tower 10 is introduced into the first heat medium inlet 321 of the first heat exchanger 30, and the stripping waste liquid and the intermediate stream of the vapor phase extracted by the vapor phase extraction unit 11 are subjected to heat exchange treatment through the first heat exchanger 30 to obtain a condensed intermediate stream and a heated stripping waste liquid; the condensed intermediate stream is passed to a second storage tank 90 to obtain a second storage tank vapor stream and a second storage tank liquid stream; the second storage tank gas phase stream is output from a second storage tank gas phase outlet 91 and then is introduced into a fifth heat exchanger 110 for heat exchange treatment, a fifth heat exchanger gas phase stream is obtained from a fifth heat exchanger gas phase outlet 111, the fifth heat exchanger gas phase stream is non-condensable gas, and a fifth heat exchanger liquid phase stream is obtained from a fifth heat exchanger liquid phase outlet 112; the fifth heat exchanger liquid phase liquid stream is refluxed to the second storage tank 90, mixed with the second storage tank liquid phase stream, and then output as an intermediate component by the second pump 80; the second storage tank 90 provides vacuum through the fourth storage tank 140 and the third pump 120, and obtains non-condensable gas from the outlet of the third pump 120; introducing the heated stripping waste liquid into a rectifying tower 10 through a first inlet 12 of the rectifying tower for rectification, obtaining a tower top stream from a first outlet 16 of the rectifying tower, and obtaining a tower bottom stream from a second outlet 17 of the rectifying tower; introducing the tower top stream into a second heat exchanger 40 for heat exchange treatment to obtain a condensed tower top stream; introducing the condensed overhead stream into a first storage tank 70 to obtain a first storage tank vapor phase stream and a first storage tank liquid phase stream; the first storage tank gas phase stream is output from a first storage tank gas phase outlet 71 and then is introduced into a fourth heat exchanger 100 for heat exchange treatment, a fourth heat exchanger gas phase stream is obtained from a fourth heat exchanger gas phase outlet 101, the fourth heat exchanger gas phase stream is non-condensable gas, and a fourth heat exchanger liquid phase stream is obtained from a fourth heat exchanger liquid phase outlet 102; the fourth heat exchanger liquid phase stream is refluxed to the first storage tank 70, mixed with the first storage tank liquid phase stream, and then split into two parts after passing through the first pump 60: one part of the light components flows back to the rectifying tower 10, and the other part of the light components flows back to the rectifying tower; the first storage tank 70 supplies vacuum through the third storage tank 130 and the third pump 120, and obtains non-condensable gas from the outlet of the third pump 120; the bottom stream is divided into two parts after passing through a fourth pump 150: one part is introduced into the third heat exchanger 50, reflows to the rectifying tower 10 after heat exchange treatment, the other part is introduced into the wiped film evaporator 20 for evaporation treatment and then is divided into two parts, one part reflows to the rectifying tower 10 from the first outlet 22 of the wiped film evaporator, the other part is introduced into the sixth storage tank 180 from the second outlet 23 of the wiped film evaporator, and then the heavy components are pumped out by the sixth pump 190 to obtain the heavy components.
As shown in fig. 3, the third embodiment of the present invention provides a preferable stripping waste liquid recovery system, and the stripping waste liquid recovery system is different from the fourth embodiment in that: the second heat exchanger 40 is provided with a second heat exchanger gas phase outlet 41 and a second heat exchanger liquid phase outlet 42; the second heat exchanger gas phase outlet 41 communicates with the fourth heat exchanger 100; the fourth heat exchanger liquid phase outlet 102 and the second heat exchanger liquid phase outlet 42 are combined through a pipeline, and then are divided into two paths after passing through the first storage tank 70 and the first pump 60; the first heat medium outlet 322 is provided with a first heat medium gas phase outlet 3221 and a first heat medium liquid phase outlet 3222; the first heat medium gas phase outlet 3221 communicates with the fifth heat exchanger 110; the liquid phase outlet 112 of the fifth heat exchanger and the liquid phase outlet 3222 are combined by a pipeline and then output an intermediate component through the second storage tank 90 and the second pump 80, other features of the embodiment are the same as those of the fourth embodiment, and details are not repeated.
The above-mentioned non-condensable gas means gas in which dissolved air in the material, air leaked from the joint into the system, etc. cannot be condensed under the operating conditions.
The purpose of the third storage tank 130 and the fourth storage tank 140 is to improve the operation stability of the stripping solution recovery system, and if the third storage tank 130 and the fourth storage tank 140 are not used, the modification of the present invention cannot be considered as being right, and still belongs to the protection scope of the present invention.
To sum up, the utility model discloses effectively overcome multiple shortcoming among the prior art and had high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (11)
1. A stripping waste liquid recovery system is characterized by comprising a rectifying tower (10), a wiped film evaporator (20), a first heat exchanger (30), a second heat exchanger (40) and a third heat exchanger (50);
a vapor phase extraction unit (11) is arranged in the rectifying tower (10); the rectifying tower (10) is also provided with: the first inlet (12) of the rectifying tower is arranged in the middle of the rectifying tower (10); the second inlet (13) of the rectifying tower is arranged at the upper part of the rectifying tower (10); the third inlet (14) of the rectifying tower is arranged at the lower part of the rectifying tower (10); the fourth inlet (15) of the rectifying tower is arranged at the lower part of the rectifying tower (10); a rectifying tower first outlet (16) arranged at the top of the rectifying tower (10); the second outlet (17) of the rectifying tower is arranged at the bottom of the rectifying tower (10);
the wiped film evaporator (20) is provided with a wiped film evaporator inlet (21), a wiped film evaporator first outlet (22) and a wiped film evaporator second outlet (23); the wiped film evaporator first outlet (22) is arranged at the top of the wiped film evaporator (20); the first outlet (22) of the wiped film evaporator is communicated with the fourth inlet (15) of the rectifying tower to form reflux; the second outlet (23) of the wiped film evaporator is arranged at the bottom of the wiped film evaporator (20) and is used for outputting heavy components;
the first heat exchanger (30) is provided with a first refrigerant inlet (311), a first refrigerant outlet (312), a first heat medium inlet (321) and a first heat medium outlet (322), the first refrigerant inlet (311) is used for introducing stripping waste liquid, the first refrigerant outlet (312) is communicated with the first inlet (12) of the rectifying tower, the vapor phase extraction unit (11) is communicated with the first heat medium inlet (321), and the first heat medium outlet (322) is used for outputting intermediate components;
the first outlet (16) of the rectifying tower is communicated with the second heat exchanger (40) and then divided into two paths: one passage is communicated with the second inlet (13) of the rectifying tower to form reflux, and the other passage is used for outputting light components;
the second outlet (17) of the rectifying tower is divided into two paths: a path communicating with said third inlet (14) of said rectification column via said third heat exchanger (50) to form a reflux stream; the other passage communicates with the wiped film evaporator inlet (21).
2. The stripping waste liquid recovery system according to claim 1, further comprising at least one of the following technical features:
1) the device also comprises a first pump (60) and/or a first storage tank (70), wherein the first pump (60) and/or the first storage tank (70) are arranged on a passage before the second heat exchanger (40) is divided into two passages;
2) the heating device also comprises a second pump (80) and/or a second storage tank (90), wherein the second pump (80) and/or the second storage tank (90) are arranged on a passage connected with the first heating medium outlet (322).
3. The stripping waste liquid recovery system according to claim 1 or 2, further comprising at least one of the following technical features:
a) the heat exchanger further comprises a fourth heat exchanger (100), wherein the fourth heat exchanger (100) is provided with a fourth heat exchanger gas-phase outlet (101) and a fourth heat exchanger liquid-phase outlet (102);
the second heat exchanger (40) is provided with a second heat exchanger gas phase outlet (41) and a second heat exchanger liquid phase outlet (42);
the second heat exchanger gas phase outlet (41) is in communication with the fourth heat exchanger (100);
the stripping waste liquid comprises a first pump (60) and/or a first storage tank (70), and the fourth heat exchanger liquid phase outlet (102) and the second heat exchanger liquid phase outlet (42) are combined through a pipeline and then divided into two paths or combined through a pipeline and then divided into two paths through the first pump (60) and/or the first storage tank (70);
the two paths are as follows: one passage is communicated with the second inlet (13) of the rectifying tower to form reflux, and the other passage is used for outputting light components;
the fourth heat exchanger gas phase outlet (101) is used for outputting non-condensable gas;
b) the heat exchanger further comprises a fifth heat exchanger (110), wherein the fifth heat exchanger (110) is provided with a fifth heat exchanger gas-phase outlet (111) and a fifth heat exchanger liquid-phase outlet (112);
the first heat medium outlet (322) is provided with a first heat medium gas phase outlet (3221) and a first heat medium liquid phase outlet (3222);
the first heat medium gas phase outlet (3221) is communicated with the fifth heat exchanger (110);
the stripping waste liquid comprises a second pump (80) and/or a second storage tank (90), the fifth heat exchanger liquid phase outlet (112) and the first heat medium liquid phase outlet (3222) are combined through a pipeline and then output an intermediate component, or the fifth heat exchanger liquid phase outlet and the first heat medium liquid phase outlet are combined through a pipeline and then output an intermediate component through the second pump (80) and/or the second storage tank (90);
the gas phase outlet (111) of the fifth heat exchanger is used for outputting non-condensable gas.
4. The stripping waste liquid recovery system according to claim 2, further comprising at least one of the following technical features:
11) in the characteristic 1), the heat exchanger further comprises a fourth heat exchanger (100), wherein the fourth heat exchanger (100) is provided with a fourth heat exchanger gas-phase outlet (101) and a fourth heat exchanger liquid-phase outlet (102);
the first storage tank (70) is also provided with a first storage tank gas phase outlet (71);
the first storage tank gas phase outlet (71) is communicated with the fourth heat exchanger (100), the fourth heat exchanger liquid phase outlet (102) is communicated with the first storage tank (70), and the fourth heat exchanger gas phase outlet (101) is used for outputting non-condensable gas;
21) in the characteristic 2), a fifth heat exchanger (110) is further included, and the fifth heat exchanger (110) is provided with a fifth heat exchanger gas-phase outlet (111) and a fifth heat exchanger liquid-phase outlet (112);
the second storage tank (90) is also provided with a second storage tank gas phase outlet (91);
the second storage tank gas-phase outlet (91) is communicated with the fifth heat exchanger (110), the fifth heat exchanger liquid-phase outlet (112) is communicated with the second storage tank (90), and the fifth heat exchanger gas-phase outlet (111) is used for outputting non-condensable gas.
5. The stripping waste liquid recovery system according to claim 1, 2 or 4, further comprising at least one of the following technical features:
1) the device also comprises a third pump (120), wherein the third pump (120) is arranged at the first outlet (16) of the rectifying tower and/or on the passage of the vapor phase extraction unit (11);
2) the device also comprises a third storage tank (130) and a third pump (120) which are communicated, wherein the third pump (120) and the third storage tank (130) are arranged on a passage of the first outlet (16) of the rectifying tower;
3) the vapor phase extraction device also comprises a fourth storage tank (140) and a third pump (120) which are communicated, wherein the third pump (120) and the fourth storage tank (140) are arranged on a passage of the vapor phase extraction unit (11).
6. The stripping waste liquid recovery system according to claim 3, further comprising at least one of the following technical features:
1) the device also comprises a third pump (120), wherein the third pump (120) is arranged at the first outlet (16) of the rectifying tower and/or on the passage of the vapor phase extraction unit (11);
2) the device also comprises a third storage tank (130) and a third pump (120) which are communicated, wherein the third pump (120) and the third storage tank (130) are arranged on a passage of the first outlet (16) of the rectifying tower;
3) the vapor phase extraction device also comprises a fourth storage tank (140) and a third pump (120) which are communicated, wherein the third pump (120) and the fourth storage tank (140) are arranged on a passage of the vapor phase extraction unit (11).
7. The stripping waste liquid recovery system according to claim 1, further comprising a fourth pump (150), wherein the second outlet (17) of the rectification column is connected to the fourth pump (150) and then divided into two paths: a path communicating with said third inlet (14) of said rectification column via said third heat exchanger (50) to form a reflux stream; the other passage communicates with the wiped film evaporator inlet (21).
8. The stripping waste liquid recovery system according to claim 1, further comprising a fifth storage tank (160) and/or a fifth pump (170);
the fifth accumulator (160) and/or the fifth pump (170) are provided in a passage connecting the first refrigerant inlet (311).
9. The stripping waste liquid recovery system according to claim 1, further comprising a sixth storage tank (180) and/or a sixth pump (190);
the sixth storage tank (180) and/or the sixth pump (190) are/is arranged on a passage connected with the second outlet (23) of the wiped film evaporator.
10. The stripping waste liquid recovery system according to claim 1, further comprising at least one of the following technical features:
1) the rectifying tower (10) is a filler rectifying tower or a plate-type rectifying tower;
2) the third heat exchanger (50) is a falling film evaporator, a siphon reboiler or a kettle reboiler;
3) the rectifying column first inlet (12) is located above the vapor phase extraction unit (11).
11. The stripping waste liquid recovery system according to claim 10, characterized in that in the feature 3), the height of the packing between the first inlet (12) of the rectification column and the vapor phase extraction unit (11) is 1m to 6m, or a plurality of stages of trays having the same separation effect as the height of the packing of 1m to 6m are provided between the first inlet (12) of the rectification column and the vapor phase extraction unit (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020846510.1U CN212575656U (en) | 2020-05-19 | 2020-05-19 | Stripping waste liquid recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020846510.1U CN212575656U (en) | 2020-05-19 | 2020-05-19 | Stripping waste liquid recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212575656U true CN212575656U (en) | 2021-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020846510.1U Withdrawn - After Issue CN212575656U (en) | 2020-05-19 | 2020-05-19 | Stripping waste liquid recovery system |
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| Country | Link |
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| CN (1) | CN212575656U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111494977A (en) * | 2020-05-19 | 2020-08-07 | 上海盛剑环境系统科技股份有限公司 | Stripping waste liquid recovery system and recovery method |
-
2020
- 2020-05-19 CN CN202020846510.1U patent/CN212575656U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111494977A (en) * | 2020-05-19 | 2020-08-07 | 上海盛剑环境系统科技股份有限公司 | Stripping waste liquid recovery system and recovery method |
| CN111494977B (en) * | 2020-05-19 | 2023-08-25 | 上海盛剑环境系统科技股份有限公司 | Stripping waste liquid recovery system and recovery method |
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