TWI577436B - Separation device - Google Patents

Description

Separation device

The present disclosure relates to a separation device, and more particularly to a separation device that can separate a plurality of boiling materials.

Volatile Organic Compounds (VOCs) waste gases usually contain many organic solvents with different compositions. At present, the industry's handling of VOCs is nothing more than adsorption, direct condensation, or combustion. However, such methods are available with lower solvent recovery rates and higher costs.

Therefore, there is an urgent need to propose a new technology for recovering solvents.

The disclosed embodiments provide a separation device that can ameliorate the aforementioned conventional problems.

According to an embodiment of the present disclosure, a separation device is proposed. The separating device comprises a dividing wall distillation column, a first heater, a second heater, a first pump, a first condenser, a second pump, a third pump, and a fifth gang. Pu and a second condenser. The dividing wall distillation column comprises a packed bed, a first inlet and a dividing plate, and the dividing plate divides the inside of the dividing wall distillation column into a first space, a second space and a third space, and the first inlet is connected a first space and located below the packed bed for receiving a mixed liquid comprising a high boiling point substance and a medium boiling point Substance and a low boiler. The first heater provides heat to the first space. The second heater provides heat to the second space. The first pump is connected to the dividing wall distillation column and is used to extract the vaporous medium boiling point substance in the second space. The first condenser is coupled to the first pump and is configured to condense the medium boiling material extracted by the first pump. The second pump is coupled to a first bottom of the first space to extract a liquid high boiling material in the first space. The third pump is connected to a second bottom of the second space to extract the liquid boiling material in the second space. The second condenser is connected to the divided wall distillation column and is used for condensing the vapor-depleted low-boiling substance discharged from the third space, and the fifth pump extracts the liquid low-boiling substance which is condensed by the second condenser.

According to another embodiment of the present disclosure, a separation device includes a first inlet, a first distillation column, a second distillation column, a first heater, a second heater, a second pump, and a The third pump, the fourth pump, the second condenser, a first storage tank and a fifth pump. The first distillation column includes a second inlet for receiving an exhaust gas, and the exhaust gas comprises a high boiling point substance, a medium boiling point substance and a low boiling point substance. The first heater provides heat to the first space of the second distillation column, and the second heater provides heat to the second space of the second distillation column. The second pump is connected to a first bottom of the second distillation column to extract the liquid high-boiling substance in the first bottom. The third pump is connected to a second bottom of the second distillation column to extract the liquid boiling material in the second bottom. The fourth pump is connected to the first distillation column and the second distillation column, and is used to extract a concentrated liquid of the exhaust gas in the bottom of one of the first distillation columns and deliver it to the first inlet. The second condenser is connected to the first distillation column and is used to condense the exhaust gas discharged from the top of one of the first distillation columns into a storage liquid. The first storage tank is used to store the storage liquid. The fifth pump is connected to the first distillation column and the first storage tank, and is used for extracting the storage liquid from the first storage tank and conveying it to the top of the first distillation column.

In order to better understand the above and other aspects of the present disclosure, the following detailed description of the preferred embodiments and the accompanying drawings will be described below, but not limited thereto.

100, 200, 300, 400, 500, 600, 700‧‧‧ separate devices

110‧‧‧ divided wall distillation tower

111‧‧‧Filled bed

110a1‧‧‧ first entrance

112‧‧‧ partition board

113, 212‧‧‧ top

120‧‧‧First heater

125‧‧‧First pump

130‧‧‧Second pump

135‧‧‧First condenser

140‧‧‧second condenser

145‧‧‧ fifth pump

150‧‧‧second heater

160‧‧‧The third pump

210‧‧‧First Distillation Tower

210a‧‧‧second entrance

211‧‧‧ bottom

220‧‧‧fourth pump

230‧‧‧First storage tank

250‧‧‧First regulating valve

260‧‧‧Second regulating valve

270‧‧‧Connecting pipe

510‧‧‧ Third condenser

520‧‧‧Second storage tank

530‧‧‧ Sixth pump

A’‧‧‧ entrance

G1‧‧‧High temperature exhaust gas

G2‧‧‧low temperature exhaust gas

G3‧‧‧purification waste gas

G1‧‧‧ high boiling point substance

G2‧‧‧ medium boiling point substance

G21‧‧‧ medium boiling liquid

G22‧‧‧ middle boiling point vapor

G3‧‧‧Low-boiling substance

L1‧‧‧ Concentrate

L2‧‧‧ stock solution

L3‧‧‧ mixed liquid

P1‧‧‧First Space

P11‧‧‧ first bottom

P2‧‧‧Second space

P21‧‧‧ second bottom

P3‧‧‧ third space

FIG. 1 is a schematic view of a separating device according to an embodiment of the present disclosure.

FIG. 2 is a schematic view of a separating device according to another embodiment of the present disclosure.

FIG. 3 is a schematic view of a separating device according to another embodiment of the present disclosure.

FIG. 4 is a schematic view of a separating device according to another embodiment of the present disclosure.

FIG. 5 is a schematic view of a separating device according to another embodiment of the present disclosure.

FIG. 6 is a schematic view of a separating device according to another embodiment of the present disclosure.

FIG. 7 is a schematic view of a separating device according to another embodiment of the present disclosure.

FIG. 1 is a schematic view of a separation device 100 in accordance with an embodiment of the present disclosure. The separation device 100 is, for example, a liquid processing device.

The separation device 100 includes a divided wall distillation column 110, a first heater 120, a first pump 125, a second pump 130, a first condenser 135, a second condenser 140, a second heater 150, and a third gang. Pu 160 and the fifth pump 145. These elements can be connected by solid tubing to transfer fluid between them.

The divided wall distillation column 110 includes at least one packed bed 111, a first inlet 110a1, and a partitioning plate 112. The partition plate 112 divides the inside of the divided wall distillation column 110 into a first space P1, a second space P2, and a third space P3, wherein the first space P1 and the second space P2 are located at a lower portion of the dividing wall distillation column 110, The third space P3 is located at the upper portion of the divided wall distillation column 110.

The first inlet 110a1 is connected to the first space P1 and is adapted to receive a mixed liquid L3, such as a mixed liquid phase stream. The first inlet 110a1 is located below the packed bed 111. Compared with the first inlet 110a1 located above the packed bed 111, since the first inlet 110a1 of the embodiment is located below the packed bed 111, it is possible to prevent the mixed liquid L3 from containing the easy polymer or the microparticle impurities blocking the packed bed. 111. Further, when the packed bed 111 is a porous material, since the first inlet 110a1 of the present embodiment is located below the packed bed 111, it is possible to prevent the mixed liquid L3 from containing the easy polymer or the microparticles blocking the packed bed 111. Hole.

Through the separation device 100 of the disclosed embodiment, the compositions of different boiling points of the organic volatiles in the mixed liquid L3 can be separated separately. The following describes how to separately separate the compositions of different boiling points of the organic volatiles in the mixed liquid L3. In the present embodiment, the mixed liquid L3 is, for example, a substance containing several different boiling points, such as a high-boiling substance g1, a medium-boiling substance g2, and a low-boiling substance g3.

The first heater 120 can provide heat to the first space P1. For example, the first heater 120 supplies heat to the first space P1 from below the packed bed 111 of the divided wall distillation column 110. The second pump 130 is connected to the first bottom portion P11 of the first space P1 to extract the liquid high-boiling substance g1 located in the first space P1.

In addition, the heating temperature of the first heater 120 may be higher than the boiling point of the medium boiling point substance g2, so that the medium boiling point substance g2 and the low boiling point substance g3 may be evaporated into a vapor state, and distributed upward in a part of the first space P1 and the second space. P2 and third space P3. The vapor-depleted low-boiling substance g3 can be discharged from the top 113 of the divided wall distillation column 110. The second condenser 140 can condense the vapor-depleted low-boiling substance g3 discharged from the third space P3.

The second heater 150 can provide heat to the second space P2 to ensure The low-boiling substance g3 is maintained in a vapor state up to the third space P3, and finally discharged from the top 113 of the divided wall distillation column 110.

The third pump 160 is connected to the second bottom portion P21 of the second space P2 to extract the medium boiling point substance g2 and the part of the high boiling point substance g1 in the second space P2. The first pump 125 can extract the medium boiling point gas g22 in the second space P2, and the first condenser 135 can condense the extracted medium boiling point gas body g22. The condensed intermediate boiling gas g22 can be recycled and reused. Further, when the mixed liquid L3 contains metal ions, the metal ions are usually present in the liquid, and are not present in the vapor, so that the condensed intermediate boiling gas g22 can be recycled and reused for the metal ion specification. industry. In one embodiment, the medium boiling point v22 may have a purity greater than 99.5 wt%.

FIG. 2 is a schematic view of a separation device 200 according to another embodiment of the present disclosure. The separation device 200 is, for example, an exhaust gas treatment device that can process high-temperature exhaust gas and can recover an organic solvent in the exhaust gas.

The separation device 200 includes a first distillation column 210, a first inlet 110a1, a first heater 120, a second heater 150, a second pump 130, a second condenser 140, a third pump 160, a second distillation column, The fourth pump 220, the first storage tank 230, the fifth pump 145, the first regulating valve 250, the second regulating valve 260 and the connecting line 270, wherein the second distillation column is, for example, the above-mentioned divided wall distillation column 110 . In addition, these elements can be connected by solid tubing to transfer fluid between them.

The first distillation column 210 includes a second inlet 210a that can accept the high temperature exhaust gas G1.

The high-temperature exhaust gas G1 is, for example, VOCs. In one embodiment, the high temperature exhaust gas G1 may contain several substances having different boiling points, such as a high boiling point substance g1, a medium boiling point substance g2, and a low boiling point substance g3. In one embodiment, the high boiling point substance g1 and the medium boiling point substance G2 is, for example, an organic volatile matter, and the low-boiling substance g3 is, for example, air. In one embodiment, the high-temperature exhaust gas G1 comprises an organic volatile matter such as a high-boiling substance g1 and a medium-boiling substance g2, wherein the organic volatile matter is, for example, selected from the group consisting of dimethylacetamide, acetic acid, and N-methylpyrrolidone (N). -Methyl-2-pyrrolidone), Propylene Glycol Mono-methyl Ether Acetate (PGMEA), dimethyl hydrazine, ethylene glycol, diethylene glycol, triethylene glycol Alcohol, propylene glycol, 1,4-butanediol, diethylene glycol monobutyl ether (BDG,), ethanolamine (Monoethanolamine), rosinol (Terpineol) and alcohol ester 12 (Texanol) Group of.

In some processes, such as the Polyimide Film process, the lithium ion battery process, the spandex process, and the polyurethane (PU) process, the exhaust gas usually contains high boiling point and combustion is easy to have NOx. And a high monovalent solvent such as N-methylpyrrolidone (NMP), dimethylformamide (DMAc) and/or dimethylformamide (DMF). The separation device 200 of the disclosed embodiment can sufficiently recover such high monovalent solvents and purify the exhaust gas discharged externally. In addition, other solvents such as acetic acid, terpineol, Texanol, diethylene glycol butyl ether (DBG), and dimethyl hydrazine can be sufficiently recovered by the separation device 200 of the disclosed embodiment. (DMSO) and/or monoethanolamine (MEA). In the field of application, the separation device 200 of the disclosed embodiment can be applied to the fields of semiconductor, photovoltaic panel, solar energy, fuel cell industry, organic thin film, fiber industry, PU synthetic leather and the like.

After the high-temperature exhaust gas G1 enters the first distillation column 210, it is in vapor-liquid contact with the low-temperature storage liquid L2 from the first storage tank 230 in the first distillation column 210, and the high-boiling substance g1 contained in the exhaust gas G1 has a boiling point. After the substance g2 and a small amount of the low-boiling substance g3 are condensed into the concentrated liquid L1, the flow proceeds downward to the bottom 211 of the first distillation column 210, and the other The low-boiling substance g3 contained in the partially uncondensed exhaust gas forms a low-temperature exhaust gas G2 with a small amount of the high-boiling substance g1 and a small amount of the medium-boiling substance g2. The low temperature exhaust gas G2 flows upward to the top 212 of the first distillation column 210 and flows outward to the second condenser 140.

For the treatment of the concentrated liquid L1 located at the bottom 211 of the first distillation column 210, the fourth pump 220 can extract the concentrated liquid L1 in the bottom portion 211 of the first distillation column 210 and output it to the divided wall distillation column 110. The partition wall distillation column 110 separates substances of different boiling points.

The concentrated liquid L1 can enter the inside of the divided wall distillation column 110 from the first inlet 110a1. The temperature of the concentrate L1 is, for example, between 30 and 250 degrees Celsius. In the present embodiment, the first inlet 110a1 is connected to the first space P1 and disposed above the packed bed 111, but in another embodiment, it may be disposed below the packed bed 111.

After the concentrated liquid L1 enters the inside of the dividing wall distillation column 110, since the heating temperature of the first heater 120 is higher than the boiling point of the medium boiling point substance g2, the medium boiling point substance g2 and the low boiling point substance g3 of the concentrated liquid L1 are evaporated into a vapor state. And distributed in a part of the first space P1, the second space P2 and the third space P3. Since the heating temperature of the first heater 120 is lower than the high-boiling substance g1, the high-boiling substance g1 flows downward to the first bottom portion P11 of the first space P1. The second pump 130 can extract a liquid high-boiling substance g1. As shown in Fig. 2, the liquid high-boiling substance g1 extracted by the second pump 130 is partially discharged, and the other portion is heated by the first heater 120 and then returned to the divided wall distillation column 110.

As shown in Fig. 2, the medium boiling point substance g2 distributed in the vapor state in the second space P2 is partially condensed into a second bottom portion P21 which is accumulated in the liquid state and accumulated in the second space P2, and is extracted from the partition wall by the third pump 160. The distillation column 110 is outside.

The second heater 150 can provide heat to the second space P2 to ensure The low-boiling substance g3 is maintained in a vapor state up to the third space P3, and finally discharged from the top 113 of the divided wall distillation column 110. The low-boiling substance g3 which is vaporized in the third space P3 can be discharged from the top 113 of the dividing wall distillation column 110 to the second condenser 140, and is condensed by the second condenser 140 into the storage liquid L2, and then stored in The first storage tank 230 is inside.

The second condenser 140 condenses the low-temperature exhaust gas G2 discharged from the top 212 of the first distillation column 210 for the treatment of the low-temperature exhaust gas G2 flowing outward from the top 212 of the first distillation column 210 to the second condenser 140. The low-boiling substance g3 contained in the condensed low-temperature exhaust gas G2, a small amount of the high-boiling substance g1, and a small amount of the medium-boiling substance g2 are converted into a liquid state (hereinafter referred to as a storage liquid L2) and stored in the first storage tank 230. Since the organic volatile matter, for example, the high-boiling substance g1 and the medium-boiling substance g2, which are completely dissolved in the storage liquid L2, the concentration of the organic volatile matter of the gas discharged from the second condenser 140 (hereinafter referred to as the purified exhaust gas G3) is extremely low. . In one embodiment, the concentration of organic volatiles from the purified exhaust gas G3 may be less than 30 ppm, or even less than 1 ppm. In summary, the first distillation column 210 of the embodiment of the present disclosure can achieve the effect of purifying exhaust gas.

The fifth pump 145 can withdraw the stock solution L2 from the first storage tank 230 and deliver it to the top 113 of the divided wall distillation column 110. After the storage liquid L2 enters the top portion 113, the temperature of the third space P3 can be lowered to prevent the temperature of the third space P3 from being too high; further, the storage liquid L2 has the technical effect of adjusting the internal temperature of the divided wall distillation column 110.

In addition, the first regulating valve 250 is disposed in a pipeline between the fifth pump 145 and the divided wall distillation column 110, and can control the flow rate of the storage liquid L2 entering the top portion 113 to more precisely adjust the dividing wall distillation tower. The temperature of the third space P3 in 110.

In addition, the fifth pump 145 can transport the storage liquid L2 into the top 212 of the first distillation column 210 to wash the high-temperature exhaust gas G1 in the first distillation column 210, and bring the organic volatile matter in the high-temperature exhaust gas G1 to the first The bottom portion 211 of the distillation column 210 forms a concentrated liquid L1 of a high concentration of organic volatile matter, and can reduce the organic volatile matter concentration of the low-temperature exhaust gas G2 discharged from the top portion 212 of the first distillation column 210, and maintain the storage liquid L2 of the low-concentration organic volatile matter. And the purpose of separating organic volatiles in the exhaust gas is achieved. In addition, the second regulating valve 260 is disposed on the pipeline between the fifth pump 145 and the first distillation column 210, and can adjust the flow rate of the storage liquid L2 entering the top 212 of the first distillation column 210 to control the low temperature exhaust gas G2. The content of organic volatile substances.

The connecting line 270 can connect the fifth pump 145 and the first storage tank 230 to balance the pumping amount and the water output of the fifth pump 145. In the present embodiment, a regulating valve (not shown) is selectively mounted on the connecting line 270 to control the flow rate of the transmission.

FIG. 3 is a schematic diagram of a separation device 300 in accordance with another embodiment of the present disclosure. The separation device 300 includes a first distillation column 210, a first inlet 110a1, a first heater 120, a second heater 150, a second pump 130, a second condenser 140, a third pump 160, a second distillation column, The fourth pump 220, the first storage tank 230, the fifth pump 145, the first regulating valve 250, the second regulating valve 260 and the connecting line 270, wherein the second distillation column is, for example, the above-mentioned divided wall distillation column 110 . In addition, these elements can be connected by solid tubing to transfer fluid between them.

The second heater 150 can supply heat to the second space P2 to ensure that the low-boiling substance g3 is maintained in the vapor state up to the third space P3, and finally discharged from the top 113 of the dividing wall distillation column 110.

Different from the separating device 200 of FIG. 2, in the present embodiment The separation device 300, the concentrate L1 extracted by the fourth pump 220, can be supplied from below the packed bed 111 of the divided wall distillation column 110 to the inside of the divided wall distillation column 110. In another embodiment, the concentrated liquid L1 extracted by the fourth pump 220 may be supplied to the inside of the divided wall distillation column 110 via the first heater 120; for example, the concentrated liquid L1 extracted by the fourth pump 220 may be The inlet a' enters between the second pump 130 and the first heater 120, so that the concentrate L1 can be pushed by the second pump 130 to the first heater 120.

FIG. 4 is a schematic view of a separation device 400 in accordance with another embodiment of the present disclosure. The separation device 400 includes a first distillation column 210, a first inlet 110a1, a first heater 120, a first pump 125, a second pump 130, a first condenser 135, a second condenser 140, and a second heater 150. a third pump 160, a second distillation column, a fourth pump 220, a first storage tank 230, a fifth pump 145, a first regulating valve 250, a second regulating valve 260, and a connecting line 270, wherein the The two distillation column is, for example, the above-described divided wall distillation column 110. In addition, these elements can be connected by solid tubing to transfer fluid between them.

The second heater 150 can supply heat to the second space P2 to ensure that the low-boiling substance g3 is maintained in the vapor state up to the third space P3, and finally discharged from the top 113 of the dividing wall distillation column 110.

Different from the separating device 200 of FIG. 2, the separating device 400 of the present embodiment further includes a first pump 125 and a first condenser 135. The first pump 125 and the first condenser 135 of the present embodiment are similar to those of the first pump 125 and the first condenser 135 of the separating apparatus 100 of FIG. 1 and will not be described again.

Unlike the separation device 200 of FIG. 2, the medium boiling point substance g2 and the part of the high boiling point substance g1 in the second space P2 are extracted by the third pump 160. Thereafter, the second portion P2 is returned to the second space P2 of the dividing wall distillation column 110 via the second heater 150, and the other portion is returned to the first space P1 of the dividing wall distillation column 110 via the first heater 120, and the other portions are directly discharge. In another embodiment, after the middle boiling point substance g2 and the part of the high boiling point substance g1 in the second space P2 are extracted by the third pump 160, the second portion is returned to the dividing wall distillation column 110 via the second heater 150. The space P2 is passed, and the remaining portion is returned to the first space P1 of the dividing wall distillation column 110 via the first heater 120. The embodiment of the present disclosure does not limit the treatment method of the extracted medium boiling point substance g2 and part of the high boiling point substance g1. The medium boiling point substance g2 and the part of the high boiling point substance g1 extracted by the third pump 160 may be (1) via the second The heater 150 is returned to the second space P2 of the partition wall distillation column 110, and (2) is returned to the separation space 200 through the first heater 120 and then returned to the first space P1 and (3) of the partition wall distillation column 110. At least one of the circumstances.

FIG. 5 is a schematic view of a separation device 500 in accordance with another embodiment of the present disclosure. The separation device 500 includes a first distillation column 210, a first inlet 110a1, a first heater 120, a second heater 150, a second pump 130, a second condenser 140, a third pump 160, a second distillation column, The fourth pump 220, the first storage tank 230, the fifth pump 145, the first regulating valve 250, the second regulating valve 260, the at least one connecting line 270, the third condenser 510, the second storage tank 520 and the sixth The pump 530, wherein the second distillation column is, for example, the above-described divided wall distillation column 110. In addition, these elements can be connected by solid tubing to transfer fluid between them.

Different from the separating device 200 of FIG. 2, the separating device 500 of the present embodiment further includes a third condenser 510, a second storage tank 520, and a sixth pump 530.

Further, the third condenser 510 can be condensed from the divided wall distillation The vapor-depleted low-boiling substance g3 discharged from the top 113 of the column 110 and the condensed low-boiling substance g3 can be stored in the second storage tank 520. The fifth pump 145 is connected to the first storage tank 230 and the second storage tank 520. Thus, the fifth pump 145 extracts the storage liquid L2 in the first storage tank 230 and then partially delivers it to the first distillation tower 210, and the rest. Partially delivered to the second storage tank 520 through the connecting line 270. The storage liquid L2 in the second storage tank 520 is taken out by the sixth pump 530, and partially sent to the top 113 of the divided wall distillation column 110 to modulate the temperature of the top 113 of the divided wall distillation column 110, while the rest is permeable. The connecting line 270 is delivered to the first storage tank 230.

The separation device 500 of the present embodiment uses two condensers (the second condenser 140 and the third condenser 510) to share the workload of the single condenser (second condenser 140) of the separation device 200 of Fig. 2, The working load of the single condenser can be alleviated; similarly, the separating device 500 of the embodiment uses two storage tanks (the first storage tank 230 and the second storage tank 520), so that the first storage tank 230 of a smaller volume can be selected. And the second storage tank 520 avoids the problem of excessive volume of the single storage tank; similarly, the separation device 500 of the embodiment uses two pumps (the fifth pump 145 and the sixth pump 530) to share the separation of FIG. The workload of a single pump (fifth pump 145) of the device 200 can thus alleviate the workload of a single pump.

In addition, if the pressures of the first distillation column 210 and the dividing wall distillation column 110 are similar, the second condenser 140 and the third condenser 510 may be integrated into a single condenser, and the first storage tank 230 and the second storage tank The 520 is integrated into a single storage tank and the fifth pump 145 and the sixth pump 530 are integrated into a single pump, and the integrated structure is the same as or similar to that shown in FIG.

FIG. 6 is a schematic diagram of a separation device 600 in accordance with another embodiment of the present disclosure. The separation device 600 includes a first distillation column 210, a first inlet 110a1, and a first inlet a heater 120, a second heater 150, a second pump 130, a second condenser 140, a third pump 160, a second distillation column, a fourth pump 220, a first storage tank 230, and a fifth pump 145, a first regulating valve 250, a second regulating valve 260, a connecting line 270, a third condenser 510, a second storage tank 520 and a sixth pump 530, wherein the second distillation column is, for example, the above-mentioned partial wall distillation Tower 110. In addition, these elements can be connected by solid tubing to transfer fluid between them.

Different from the separating device 500 of FIG. 5, the concentrated liquid L1 of the separating device 600 of the present embodiment can enter the inside of the dividing wall distillation column 110 from below the packed bed 111, so that the concentrated liquid L1 can be prevented from blocking the packed bed downward. 111. Further, in general, the concentrate L1 contains microparticles; however, since the first inlet 110a1 of the present embodiment is located below the packed bed 111, it is possible to prevent the microparticles of the concentrate L1 from blocking the pores of the packed bed 111. In another embodiment, the concentrate L1 can enter the interior of the divided wall distillation column 110 from the inlet a' between the first heater 120 and the second pump 130.

FIG. 7 is a schematic diagram of a separation device 700 in accordance with another embodiment of the present disclosure. The separation device 700 includes a first distillation column 210, a first inlet 110a1, a first heater 120, a first pump 125, a second pump 130, a first condenser 135, a second condenser 140, a second heater 150, The third pump 160, the second distillation column, the fourth pump 220, the first storage tank 230, the fifth pump 145, the first regulating valve 250, the second regulating valve 260, the connecting line 270, and the third condenser 510, a second storage tank 520 and a sixth pump 530, wherein the second distillation column is, for example, the above-mentioned divided wall distillation column 110. In addition, these elements can be connected by solid tubing to transfer fluid between them.

Different from the separating device 500 of FIG. 5, the points of this embodiment The off device 700 further includes a first pump 125 and a first condenser 135. The first pump 125 and the first condenser 135 of the present embodiment are similar to the first pump 125 and the first condenser 135 of the separating device 500 of FIG. 5, respectively, and are not described herein again.

As shown in Tables 1 and 2 below, the data of Experimental Examples A and B in the table are the software simulation data of the separation apparatus of the present embodiment, and the data of Comparative Examples C and D are the software simulation data of the conventional separation apparatus. Further, Experimental Example A and Comparative Example C were carried out in an environment where the outside temperature was 36 degrees Celsius and the external humidity was 80%, and Experimental Example B and Comparative Example D were at an external temperature of 10 degrees Celsius and an external humidity of 65. Experiment in % environment.

As can be seen from Table 1, the organic volatile matter concentration of the purified exhaust gas G3 of Experimental Examples A and B was less than 1 ppm, which was sufficient to comply with the sewage discharge regulations. It can be seen from Table 2 that since the wastewaters of Experimental Examples A and B can be fully recovered and reused, there is no wastewater treatment amount (zero discharge of wastewater); in contrast, Comparative Examples C and D both generate a certain amount of wastewater treatment, resulting in an increase in wastewater treatment costs. The load of the wastewater treatment equipment is increased and/or such wastewater is wasteful of water resources because it cannot be reused; particularly in a high temperature and high humidity environment, as shown in Comparative Example C, the wastewater treatment capacity is as high as 554 kg/hr.

In addition, in a low-temperature and low-humidity environment, it is usually necessary to replenish the amount of water from the outside to the distillation column, but the amount of water replenishment of the embodiment is lower than that of the conventional distillation column. For example, as shown in Table 2, in the low-temperature and low-humidity environment, the amount of water replenished in Experimental Example B (such as 94 kg/hr) is less than that in Comparative Example D (such as 107 kg/hr), which saves Water cost. In addition, as can be seen from Table 2, the recovery rate of the working solvent (for example, the medium boiling point gas g22) can be as high as 97.8%, which is not lower than the conventional separation device.

In summary, the separation device of the present disclosure has the advantages of Comparative Examples C and D, and additionally has the advantages of Comparative Examples C and D, such as less water replenishment, reuse of wastewater, reuse of wastewater, or waste water. Zero discharge, work dissolution The agent has high recovery rate, high purity of the recovered working solvent and/or effective purification of the exhaust gas. In addition, since the condenser, the pump, and the storage tank of the embodiment of the present disclosure allow the two distillation columns to be used in common, the cost of constructing the entire separation device can be greatly reduced.

In the above, the disclosure has been disclosed in the above preferred embodiments, and is not intended to limit the disclosure. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure. Therefore, the scope of protection of this disclosure is subject to the definition of the scope of the appended claims.

100‧‧‧Separation device

110‧‧‧ divided wall distillation tower

111‧‧‧Filled bed

110a1‧‧‧ first entrance

112‧‧‧ partition board

113‧‧‧ top

120‧‧‧First heater

125‧‧‧First pump

130‧‧‧Second pump

135‧‧‧First condenser

140‧‧‧second condenser

145‧‧‧ fifth pump

150‧‧‧second heater

160‧‧‧The third pump

L3‧‧‧ mixed liquid

G1‧‧‧ high boiling point substance

G2‧‧‧ medium boiling point substance

G21‧‧‧ medium boiling liquid

G22‧‧‧ middle boiling point vapor

G3‧‧‧Low-boiling substance

P1‧‧‧First Space

P11‧‧‧ first bottom

P2‧‧‧Second space

P21‧‧‧ second bottom

P3‧‧‧ third space

Claims (14)

A separating device comprising: a dividing wall distillation column comprising a packed bed, a first inlet and a dividing plate, the dividing plate dividing the interior of the dividing wall distillation column into a first space and a second a first inlet connected to the first space and below the packed bed for receiving a mixed liquid, the mixed liquid comprising a high boiling point substance, a medium boiling point substance and a low boiling point substance; a heater for supplying heat to the first space; a second heater for supplying heat to the second space; a first pump connected to the dividing wall distillation column for extracting the second space a medium-boiling substance in a vapor state; a first condenser connected to the first pump and configured to condense the medium-boiling substance extracted by the first pump; and a second pump connected to the first pump a first bottom portion of the first space to extract the high boiling point material in the first space; a third pump connected to a second bottom of the second space to extract the second space The medium boiling point substance in liquid form; a second cold And the fifth-stage pump for extracting the vaporized by the second condenser; Liquid low-boiling substance. A separation device comprising: a first inlet; a first distillation column comprising a second inlet for receiving an exhaust gas comprising a high boiling point substance, a medium boiling point substance and a low boiling point substance a second distillation column; a first heater providing heat to a first space of the second distillation column; a second heater providing heat to a second space of the second distillation column; a second a pump connected to a first bottom of the second distillation column to extract the liquid boiling material in the first bottom; a third pump connected to a second bottom of the second distillation column Extracting the medium boiling point material in the second bottom portion; a fourth pump connecting the first distillation column and the second distillation column, and extracting the bottom portion of the first distillation column a concentrated liquid of the exhaust gas is sent to the first inlet; a second condenser is connected to the first distillation column, and is used to condense the exhaust gas discharged from the top of one of the first distillation columns into a storage liquid; a first storage tank for storing the storage liquid; A fifth pump, connected to the first distillation column and the first reservoir, and the reservoir for liquid withdrawn from the first storage tank and conveyed to the top of the first distillation column. The separation device of claim 1 or 2, wherein the The three pumps are further configured to deliver the medium boiling point material in a liquid state in the second bottom to the first heater. The separation device of claim 2, wherein the second condenser is further configured to condense the low-boiling substance in a vapor state discharged from a top of the second distillation column into the storage liquid. The separation device of claim 2, wherein the fifth pump is further configured to withdraw the storage liquid from the first storage tank and deliver the liquid to the top of the second distillation column. The separation device of claim 2, wherein the first inlet is provided in the second distillation column. The separation device of claim 2, wherein the first inlet is disposed between the second pump and the first heater. The separation device of claim 2, wherein the second distillation column is a divided wall distillation column. The separation device of claim 8, wherein the second distillation column comprises a packed bed, the first inlet and a partition plate, the partition plate separating the wall The interior of the distillation column is divided into a plurality of spaces that connect one of the spaces and are located below the packed bed. The separation device of claim 2, wherein the second distillation column comprises a partition plate, the partition plate dividing the interior of the divided wall distillation column into the first space, the second space, and a third space, the first inlet and the second pump are connected to the first space, the third pump is connected to the second space, and the second condenser is connected to the third space. The separation device of claim 2, further comprising: a third condenser connected to the second distillation column and configured to condense the low vapor phase discharged from a top of the second distillation column a boiling point substance; a second storage tank for storing the condensed low-boiling substance; a sixth pump connecting the second storage tank and the second distillation tower, and for extracting the second storage tank The condensed low-boiling substance is sent to the top of the second distillation column. The separation device of claim 11, wherein the fifth pump connects the first storage tank and the second storage tank. The separation device of claim 11, wherein the sixth pump connects the first storage tank and the second storage tank. The separation device of claim 2, further comprising: a first pump connected to the second distillation column, and for extracting the medium boiling point substance in a vapor state in the second distillation column; And a first condenser for condensing the medium boiling point material after being extracted by the first pump.