Distillation apparatus

Abstract

To provide a compact distillation apparatus.SOLUTION: A distillation apparatus 100 comprises a vaporization tower 110 to evaporate a solvent in sea water SW and a condensation tower 160 to liquefy the evaporated solvent and separate as distilled water DW. The vaporization tower 110 is equipped with a heated water tank 117 to heat the sea water SW, a heat medium pipe 112 to be spread in the heated water tank 117 and transport the hot blast HB as a heating medium from a heat source, a ceiling wall 125 covering the heated water tank 117 from above and having a shape where upper inside is recessed upward and a guide pipe 126 discharging the evaporated solvent upward and being extended upward from the center of the ceiling wall 125. The condensation tower 160 has a cooler 161 being sequentially connected on the ceiling wall 125, covering around a vapor outlet 127 at the upper end part of the guide pipe tube 126 and obtaining the distilled water DW by cooling and liquefying the evaporated solvent.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a distillation apparatus for separating a solvent from an aqueous solution.

Background Art

[0002] Conventionally, a distillation apparatus for separating a solvent in an aqueous solution has been known. The distillation apparatus of Patent Document 1 heats and evaporates the aqueous solution, and condenses and separates the evaporated water. Since this distillation apparatus can perform condensation of water in a condensation tower, the distillation apparatus is made compact. Note that Patent Document 1 is a patent application by the applicant of the present application.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] There is a desire to make the conventional distillation apparatus described in the patent document more compact.

[0005] The problem to be solved by the technology of this specification has been made in view of the above points, and an object thereof is to provide a compact distillation apparatus.

Means for Solving the Problems

[0006] A distillation apparatus including an evaporation tower for vaporizing a solvent of an aqueous solution and a condensation tower for liquefying and separating the vaporized solvent, The evaporation tower includes a heating water tank in which the aqueous solution is heated, a heat medium pipe stretched around the heating water tank for transferring a heat medium from a heat source, a ceiling wall covering the heating water tank from above and having a shape in which the upper inner side is recessed upward, and a guiding pipe extending upward from the center of the ceiling wall for discharging the vaporized solvent upward. The condensing tower is characterized by being connected to the ceiling wall, covering the area around the solvent outlet at the upper end of the induction tube, and comprising a cooler for cooling and liquefying the vaporized solvent.

[0007] According to the distillation apparatus of the embodiment described herein, the solvent vaporized from the aqueous solution heated in the heated water tank of the evaporator is cooled in the condenser of the condenser to become a liquid. Since the condenser is connected to the ceiling wall of the evaporator, the distillation apparatus can be made compact.

[0008] In the above-mentioned distillation apparatus, a cooling jacket can be provided on the ceiling surface of the condensing column to cool the solvent by circulating cooling water.

[0009] According to this design, the ceiling surface equipped with a cooling jacket becomes the cooling surface for the cooler, allowing the distillation apparatus to be made more compact.

[0010] Furthermore, in the above distillation apparatus, an upper partition plate and a lower partition plate are provided within the condensing column, respectively, which traverse the inside of the condensing column in a horizontal direction. Between the upper partition plate and the lower partition plate, there is a cooling layer that cools the solvent by circulating cooling water. The aforementioned guide tube penetrates the cooling layer vertically, The cooling layer can be configured to have a number of cooling pipes that penetrate it vertically.

[0011] According to this, the vaporized solvent discharged from the solvent outlet of the guide tube flows into the cooling tube that penetrates the cooling layer as it is discharged sequentially, and is cooled within the cooling tube, thereby promoting the liquefaction of the solvent.

[0012] Furthermore, in the above-mentioned distillation apparatus, the outside of the induction tube may be covered with an insulating material.

[0013] According to this method, liquefaction within the induction tube can be suppressed.

[0014] In addition, in the distillation apparatus, a liquid reservoir for storing the liquefied solvent is provided below the condensation tower, and a discharge port for discharging the solvent is provided. A solvent water tank for storing the solvent discharged from the discharge port is provided, and a circulation pipe for circulating the solvent is provided outside the solvent water tank. The circulation pipe is provided with a circulation pump that serves as a power source for circulating the solvent, and an ejector that serves as a suction pump due to the circulation of the solvent. The suction port of the ejector can be connected to the discharge port.

[0015] According to this, the condensation tower and the evaporation tower can be depressurized by the suction of the ejector, and the distillation of the solvent can be promoted.

[0016] In addition, in the distillation apparatus, the heat source can be configured to be obtained by burning organic waste fuel or biomass fuel.

[0017] According to this, the distillation apparatus of the embodiment can be made environmentally friendly.

Effects of the Invention

[0018] According to the distillation apparatus according to the embodiment of the present specification, the distillation apparatus can be made compact.

Brief Description of the Drawings

[0019] [Figure 1] It is an overall flow diagram of a distillation plant including the distillation apparatus of the first embodiment. [Figure 2] It is a vertical cross-sectional view of the distillation apparatus. [Figure 3] It is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] It is a cross-sectional view taken along line IV-IV in FIG. 2. [Figure 5] It is a front image view of the distillation water tank of the first embodiment. [Figure 6] It is an overall flow diagram of a distillation plant including the distillation apparatus of the second embodiment. [Figure 7] It is an overall flowchart of a distillation plant including the distillation apparatus of the third embodiment.

Mode for Carrying Out the Invention

[0020] Hereinafter, the first to third embodiments of the distillation apparatus in this specification will be described based on the drawings. The distillation apparatuses 100 of the first to third embodiments use seawater SW as an aqueous solution to be distilled, remove salts (including other mineral components) from the seawater SW, and obtain distilled water DW (solvent) that can be used for drinking, etc. as an example. However, the aqueous solution according to the embodiment is not limited to seawater SW, and river water, sewage sludge, oil-water, domestic wastewater, industrial wastewater, etc. can also be used, and distilled water DW that can be used for drinking, etc. can also be obtained from these.

[0021] In this specification, as shown in FIGS. 1 and 2, the orientation of the distillation apparatus 100 is defined as follows: up and down refer to the up and down in the installed state, left and right refer to the right side as the inlet side of the heat medium path 111, front and back refer to the front side of the drawing as the front, and in the illustration, F represents front, B represents back, U represents up, D represents down, L represents left, and R represents right. Also, based on the inside of the distillation apparatus 100, it may be expressed as inside or outside.

[0022] (First Embodiment) As shown in FIG. 2, the distillation apparatus 100 of the first embodiment includes an evaporation tower 110 that vaporizes the solvent of seawater SW, and a condensation tower 160 that liquefies the vaporized solvent and separates it as distilled water DW. The evaporation tower 110 includes a heating water tank 117 in which seawater SW is heated, a heat medium pipe 112 that is stretched around the heating water tank 117 and transfers hot air HB as a heat medium from the heat source 300, a ceiling wall 125 that covers the heating water tank 117 from above and has a shape in which the upper inner side is recessed upward, and a guiding pipe 126 that extends upward from the center of the ceiling wall 125 and discharges the vaporized solvent upward. The condensation tower 160 is connected above the ceiling wall 125, covers the periphery of the vapor outlet 127 at the upper end of the guiding pipe 126, and includes a cooler 161 that cools and liquefies the vaporized solvent to obtain distilled water DW.

[0023] The evaporation tower 110 is roughly rectangular in shape and has a heating tank 117 in the center, which is also roughly rectangular in shape, for heating seawater SW. Seawater SW is supplied to the heating tank 117 from a seawater supply port 121. Heat transfer chambers 113 through which hot air HB is guided are provided on both the left and right sides of the heating tank 117. The left heat transfer chamber 113 is divided into two parts vertically by a partition plate 114, forming the lower left heat transfer chamber 113A and the upper left heat transfer chamber 113C, as shown in Figure 2. The right heat transfer chamber 113 is referred to as heat transfer chamber 113B.

[0024] A heat transfer medium passage 111 penetrates the lower half of the heated water tank 117 in the left-right direction from the right outer side of the evaporation tower 110 to the lower left heat transfer medium chamber 113A. The heat transfer medium passage 111 guides hot air HB from the heat source 300 to the lower left heat transfer medium chamber 113A. As shown in Figure 4, 20 heat transfer medium pipes 112 penetrate the heated water tank 117 from the lower left heat transfer medium chamber 113A to the lower half of the right heat transfer medium chamber 113B. The heat transfer medium pipes 112 heat the seawater SW in the heated water tank 117 with the heat from the hot air HB, evaporating the water, which is the solvent in the seawater SW, and generating water vapor VW. When the seawater SW is heated and the water evaporates as water vapor VW, the salt, which is the solute in the seawater SW, does not vaporize and remains in the seawater SW, so the water vapor VW is desalted.

[0025] As shown in Figure 4, 21 heat transfer pipes 112 penetrate the heating water tank 117 from the upper half of the right heat transfer chamber 113B to the upper left heat transfer chamber 113C. Hot air HB is guided from the right heat transfer chamber 113B to the upper left heat transfer chamber 113C, and at the same time, water, which is the solvent for the seawater SW in the heating water tank 117, is vaporized to generate water vapor VW. In other words, the hot air HB is directed from the heat source 300 through the heat transfer medium passage 111 to the lower left heat transfer medium chamber 113A, then through the heat transfer medium pipe 112 to the lower side of the right heat transfer medium chamber 113B, moves upward within the right heat transfer medium chamber 113B, and is directed from the upper side of the heat transfer medium chamber 113B through the heat transfer medium pipe 112 to the upper left heat transfer medium chamber 113C, where it vaporizes the water, which is the solvent for the seawater SW in the heated water tank 117, to produce water vapor VW. Outside the upper left heat transfer medium chamber 113, an exhaust tower 116 is provided to release the hot air HB to the outside of the distillation apparatus 100, and the hot air HB is released to the outside.

[0026] A hot air thermometer 120 is installed in the heat transfer chamber 113A on the lower left side to measure the temperature of the hot air HB. The output of the heat source 300 is adjusted based on the temperature of the hot air HB and the temperature of the water thermometer 119, which measures the temperature of the seawater SW, as will be described in more detail later.

[0027] The upper part of the heated water tank 117 is covered by a ceiling wall 125 with an inwardly concave shape. A guide pipe 126 extends upward from the center of the ceiling wall 125, transferring water vapor VW, which is the vaporized solvent, from the steam outlet 127 of the guide pipe 126 to the condensing tower 160. The outer circumference of the guide pipe 126 is covered with an insulating material 128 (Figure 3). This is to prevent the water vapor VW from coming into contact with the guide pipe 126 and liquefying (condensing). A seawater supply port 121 is provided at the upper left end of the heated water tank 117 to which seawater SW is supplied. A water level regulator 122 is installed on the right side of the heated water tank 117, and the water level in the heated water tank 117 is kept approximately constant by the water level regulator 122 opening and closing a supply valve 124, thereby adjusting the amount of seawater SW flowing in from the seawater supply port 121.

[0028] A thermometer 119 is installed in the heated water tank 117 to measure the temperature of the seawater SW, and together with the hot air thermometer 120, it adjusts the output of the heat source.

[0029] Furthermore, a salinity meter 129 is installed in the heating water tank 117, and by checking the salinity, the seawater SW can be replaced before it boils down and salt precipitates. For example, the salinity when replacing the seawater SW can be set to 20% by mass, which is slightly lower than the concentration at which salt precipitates begin (22% by mass). A drain 118 is provided at the bottom of the heating water tank 117, and as will be described in more detail later, the highly concentrated brine CW obtained by boiling down the seawater SW is transferred to a concentrated water recovery tank 250 for recovery.

[0030] The condenser 160 is connected to the ceiling wall 125 of the heated water tank 117 and is a device that liquefies steam VW transferred from the steam outlet 127 of the induction pipe 126 to produce distilled water DW. Because the condenser 160 is connected to the ceiling wall 125 of the evaporator 110, the distillation apparatus 100 can be made compact.

[0031] Inside the condensing tower 160, there are upper partition plates 171 and lower partition plates 172 that traverse the inside of the condensing tower 160 horizontally. Between the upper partition plate 171 and the lower partition plate 172, a cooling layer 170 is formed, which acts as a cooler 161 through which cooling water RW circulates. A guide pipe 126 penetrates the cooling layer 170 from bottom to top, and steam VW generated in the evaporating tower 110 is transferred from the heated water tank 117 through the guide pipe 126 to a steam reservoir 165 located above the cooling layer 170.

[0032] A draft valve 177 is installed in the steam reservoir 165, and when the inside of the steam reservoir 165 becomes abnormally hot or abnormally high, the steam reservoir 165 The inside is exposed to the outside air Air is guided in. A thermometer 168 for measuring temperature and a pressure gauge 169 for measuring pressure are installed in the steam reservoir 165 and the liquid reservoir 166 connected thereto.

[0033] The ceiling surface 162 of the condensing tower 160 (steam dome 165) is equipped with a cooling jacket 175 that cools the steam VW by circulating cooling water RW. Since the ceiling surface 162 equipped with the cooling jacket 175 acts as a cooler 161, the distillation apparatus 100 can be made compact. A portion of the steam VW cooled on the ceiling surface 162 liquefies into distilled water DW and falls onto the upper partition plate 171 of the cooling layer 170.

[0034] As shown in Figure 3, 60 cooling pipes 164 are provided running vertically through the cooling bed 170. Distilled water DW that falls onto the upper partition plate 171 of the cooling bed 170 flows through the cooling pipes 164 to the liquid reservoir 166 of the condensing tower 160. In addition, steam VW discharged from the steam outlet 127 of the induction pipe 126 is discharged sequentially and flows into the cooling pipes 164 that penetrate the cooling bed 170, where it is cooled and converted into distilled water DW, which then flows through the cooling pipes 164 to the liquid reservoir 166 of the condensing tower 160.

[0035] The distilled water DW that flows into the liquid reservoir 166 is, as will be described in more detail later, sucked into the distillation tank 230 under reduced pressure by the ejector 234 of the distillation tank 230. Because it is sucked in by the ejector 234, the inside of the condensing tower 160 and the heated water tank 117 of the evaporation tower 110 are under reduced pressure. As a result, compared to atmospheric pressure, seawater SW can be vaporized at a lower temperature to produce water vapor VW, and the distillation apparatus 100 of this embodiment can be made to have excellent thermal efficiency.

[0036] Next, we will describe the auxiliary equipment that constitutes the distillation plant 1 of the first embodiment, which consists of the distillation apparatus 100 of the embodiment.

[0037] As shown in Figure 1, the auxiliary equipment constituting the distillation plant 1 of the first embodiment includes a seawater tank 210 for supplying seawater SW, a distillation water tank 230 as a solvent water tank for recovering distilled water DW obtained by distilling from seawater SW, a concentrated water recovery tank 250 for recovering high-concentration brine CW obtained by boiling down seawater SW, and a combustion furnace 310 which serves as a heat source for the evaporation tower 110.

[0038] The seawater tank 210 (Figure 1) is a tank that supplies seawater SW to the heated water tank 117 of the evaporation tower 110. Seawater SW is stored in the tank, and the supply pump 212 supplies the seawater SW to the seawater supply port 121 of the heated water tank 117. The amount of seawater SW supplied is adjusted by the water level regulator 122 opening and closing the supply pump 212 and the supply valve 124, so that the water level in the seawater tank 210 is kept approximately constant.

[0039] The distillation water tank 230 (Figure 5), which serves as a solvent water tank, not only sucks and recovers distilled water DW distilled from seawater SW using the provided ejector 234, but also reduces the pressure inside the condensing tower 160 and the heating water tank 117 of the evaporating tower 110. Furthermore, the distillation water tank 230 is a tank that supplies cooling water RW to the cooling layer 170 and cooling jacket 175 of the condensing tower 160.

[0040] The distillation tank 230 comprises a main tank 231 and an auxiliary tank 232 for storing distilled water DW. The main tank 231 is equipped with a circulation pipe 233 for circulating the distilled water DW in the main tank 231. The circulation pipe 233 is equipped with a circulation pump 235 for circulating the distilled water DW and an ejector 234 which acts as a suction pump. The ejector 234 sucks in the distilled water DW produced in the condensing tower 160 and stores the distilled water DW in the distillation tank 230. As the ejector 234 sucks in the distilled water DW and reduces the pressure inside the condensing tower 160 and the heated water tank 117 of the evaporating tower 110, seawater SW can be vaporized at a lower temperature to produce water vapor VW compared to atmospheric pressure, thus the distillation apparatus 100 of this embodiment can have excellent thermal efficiency. The main water tank 231 is equipped with a distilled water thermometer 246 for measuring the temperature of the distilled water DW, and an atmospheric vent pipe 245 for maintaining a constant pressure inside the main water tank 231.

[0041] Furthermore, when there is no distilled water DW in the distillation tank 230, such as when the distillation apparatus 100 is started, and the ejector 234, which acts as a suction pump, cannot be operated, a blower (not shown) can be used to blow air from the air guide valve 177 of the condensing tower 160 to the steam reservoir 165 and the liquid reservoir section 166, allowing the distilled water DW in the liquid reservoir section 166 to flow into the main water tank 231 via the ejector 234. The air blown from the air guide valve 177 is discharged outside the main water tank 231 through the atmospheric outlet pipe 245.

[0042] The main water tank 231 is equipped with cooling pipes 238 that supply cooling water RW (distilled water DW) to the cooling layer 170 and cooling jacket 175, which serve as the cooler 161 for the condenser tower 160. The cooling pipes 238 supply cooling water RW from the main water tank 231, via the cooling water pump 239 and branch 240, to the cooling layer 170 and cooling jacket 175, and the cooling water RW, which has cooled the water vapor VW (distilled water DW) in the cooling layer 170 and cooling jacket 175, is then recovered back into the main water tank 231. The cooling pipes 238 are equipped with an outlet valve 241 that allows the distilled water DW to be extracted.

[0043] The main water tank 231 is equipped with an overflow conduit, which allows any distilled water DW exceeding a certain volume accumulated in the main water tank 231 to flow into the auxiliary water tank 232. The auxiliary water tank 232 is equipped with a distilled water outlet 244, allowing the distilled water DW to be used as drinking water or for other purposes.

[0044] The concentrated water recovery tank 250 (Figure 1) recovers the highly concentrated brine CW obtained by boiling down seawater SW in the heating water tank 117 of the evaporation tower 110. The seawater SW needs to be replaced periodically to prevent salt precipitation. The guideline for replacement is a concentration of 20% by mass, which is slightly lower than the 22% by mass concentration at which salt precipitation occurs. The salinity can be checked with the salinity meter 129 of the evaporation tower 110. By further boiling down the highly concentrated brine CW recovered in the concentrated water recovery tank 250, salt (table salt) can be obtained by concentrating the solute of the seawater SW.

[0045] The combustion furnace 310 (Figure 1) provides a heat source to the evaporator tower 110. The combustion furnace 310 can use organic waste fuel or biomass fuel as its fuel FU. Using organic waste fuel or biomass fuel as the fuel FU makes the distillation apparatus of this embodiment environmentally friendly.

[0046] (Second embodiment) As shown in Figure 6, the distillation apparatus 100 of the second embodiment uses a heating burner 320 that burns methane gas (city gas) as the heat source 300 supplied to the evaporator tower 110. The distillation apparatus 100 of the second embodiment differs from the distillation apparatus 100 of the first embodiment in that the heat source 300 is different, but otherwise it is the same as the distillation apparatus 100 of the first embodiment. Therefore, elements common to the first embodiment will be referred to with the same reference numerals and their explanations will be omitted. In the distillation apparatus 100 of the second embodiment, by using city gas as the heat source 300, a stable heat source 300 can be obtained.

[0047] (Third embodiment) As shown in Figure 7, the distillation apparatus 100 of the third embodiment uses a heat source boiler 330 that generates high-temperature, high-pressure steam as the heat source 300 supplied to the evaporator tower 110. Because the heat source 300 is high-temperature, high-pressure steam, the heat transfer medium chamber 113 is provided with a drain 115 for discharging water that has cooled and liquefied from the steam. Also, because the heat source 300 is high-temperature, high-pressure steam, a shut-off valve 130 is attached to the exhaust tower 116 in order to maintain high temperature and high pressure inside the evaporator tower 110. The distillation apparatus 100 of the third embodiment differs from the distillation apparatus 100 of the first embodiment in that the heat source 300 is different, but otherwise it is the same as the distillation apparatus 100 of the first embodiment. Therefore, elements common to the first embodiment will be described using the same reference numerals. By using a heat source boiler 330 that generates high-temperature, high-pressure steam as the heat source 300, the distillation apparatus 100 of the third embodiment can operate the distillation plant 3 using, for example, high-temperature, high-pressure steam from by-products generated in a waste incinerator. [Examples]

[0048] The distillation plant used in the example was distillation plant 2 of the second embodiment, and was of the following configuration.

[0049] Distillation apparatus 100 Evaporation tower 110 Heating water tank 117 W1000mm×D800mm×H800mm Heat medium path 111 Ф250mm×L1200mm×1 Heat medium pipe 112 Ф60mm×L1000mm×30 pieces Condensing tower 160 W800mm×D800mm×H1000mm Cooling layer 170 W800mm×D800mm×H500mm Cooling pipe 164 Ф60mm×L500mm×90 pieces Cooling jacket 175 W800mm x D800mm x H100mm Liquid reservoir section 166 W800mm x D800mm x H300mm Seawater tank 210 W1000mm×D1000mm×H1000mm Supply pump 212 40A 0.2kW 230 distillation tanks Main water tank 231 W1000mm×D600mm×H800mm Circulation pump 235 50A 0.75kW Cooling water pump 239 40A 0.4kW Heating burner 320 250,000 kcal / h In the distillation plant of the example, 500 liters of distilled water (DW) were obtained per hour from seawater (SW). The amount of city gas used was 25 m³ per hour. 3 The pressure in the steam dome 165 of the condenser tower 160 was -0.04 MPa in gauge pressure.

[0050] (Other embodiments) The distillation apparatus of the embodiment can also be implemented in the following configuration.

[0051] The distillation apparatus of this embodiment is described as an example of distilling distilled water DW from seawater SW, but it can also be applied to the distillation of distilled water DW that does not contain harmful substances from water containing harmful substances such as heavy metals such as chromium and arsenic. It can also be applied to the distillation of spirits in which the alcohol concentration is increased. Furthermore, although precise temperature control is required, it can also be applied to distillation to extract water or organic solvent from a mixture of water and organic solvent. In this case, water or organic solvent with a low boiling point is recovered in the distillation water tank 230, and water or organic solvent with a high boiling point is recovered from the concentrated water recovery tank 250. [Explanation of Symbols]

[0052] 1...Distillation plant, 2...Distillation plant, 3...Distillation plant, 100...Distillation apparatus, 110...Evaporation tower, 111...Heat transfer medium passage, 112...Heat transfer medium pipe, 113...Heat transfer medium chamber, 113A...Heat transfer medium chamber, 113B...Heat transfer medium chamber, 113C...Heat transfer medium chamber, 114...Partition plate, 115...Drainage drain, 116...Exhaust tower, 117...Heated water tank, 118...Discharge drain, 11 9...Water thermometer, 120...Hot air thermometer, 121...Seawater inlet, 122...Water level regulator, 124...Supply valve, 125...Ceiling wall, 126...Induction pipe, 127...Steam outlet, 128...Insulation material, 129...Salinity meter, 130...Closing valve, 160...Condensation tower, 161...Cooler, 162...Ceiling surface, 164...Cooling pipe, 165...Steam reservoir, 166...Liquid reservoir section, 168 ...Thermometer, 169...Pressure gauge, 170...Cooling layer, 171...Upper partition plate, 172...Lower partition plate, 175...Cooling jacket, 177...Air guide valve, 210...Seawater tank, 212...Supply pump, 230...Distillation tank, 231...Main tank, 232...Auxiliary tank, 233...Circulation piping, 234...Ejector, 235...Circulation pump, 238...Cooling piping, 239...Cold Water removal pump, 240...branch, 241...outlet valve, 244...distilled water outlet, 245...open to atmosphere pipe, 246...distilled water thermometer, 250...concentrated water recovery tank, 300...heat source, 310...combustion furnace, 320...heating burner, 330...heat source boiler, CW...high-concentration brine, DW...distilled water, FU...fuel, HB...hot air, RW...cooling water, SW...seawater, VW...steam.

Claims

1. A distillation apparatus comprising an evaporation column for vaporizing an aqueous solvent and a condensation column for liquefying and separating the vaporized solvent, The evaporation tower comprises a heating tank in which the aqueous solution is heated, heat transfer pipes extending around the heating tank for transferring a heat transfer medium from a heat source, a ceiling wall covering the heating tank from above and having an upwardly concave shape on the inside, and a guide pipe extending upward from the center of the ceiling wall for discharging the vaporized solvent upward. The condensing tower is connected to the ceiling wall and includes a cooler that covers the solvent outlet at the upper end of the induction tube and cools the vaporized solvent to liquefy it. The condensing tower is provided with an upper partition plate and a lower partition plate that traverse the tower horizontally, and a cooling layer is provided between the upper partition plate and the lower partition plate for cooling the solvent by circulating cooling water, and a number of cooling pipes are provided in the cooling layer that penetrate the cooling layer vertically. The guide tube penetrates the cooling layer vertically, A distillation apparatus characterized by comprising a vapor reservoir on the cooling layer, through which the solvent is transferred from the induction tube, and an air guide valve installed in the vapor reservoir.

2. The distillation apparatus according to claim 1, characterized in that the ceiling surface of the condensing tower is provided with a cooling jacket for cooling the solvent by circulating cooling water.

3. The distillation apparatus according to claim 1 or 2, characterized in that the outside of the induction tube is covered with an insulating material.

4. The lower part of the condensing tower is provided with a liquid reservoir for storing the liquefied solvent and an outlet for discharging the solvent, A solvent tank is provided for storing the solvent discharged from the outlet, and a circulation pipe is provided outside the solvent tank for circulating the solvent. The circulation piping includes a circulation pump that provides power for circulating the solvent, and an ejector that becomes a suction pump through the circulation of the solvent. The distillation apparatus according to any one of claims 1 to 3, characterized in that the suction port of the ejector is connected to the discharge port.

5. The distillation apparatus according to any one of claims 1 to 4, characterized in that the heat source is obtained by burning organic waste fuel or biomass fuel.

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