JP2015203068A - Distilling and refining apparatus of biodiesel oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a distilling and refining apparatus of biodiesel oil that can be applied to a continuous system and can refine biodiesel oil more efficiently.SOLUTION: A distilling and refining apparatus of biodiesel oil for refining intermediate biodiesel oil obtained in a production process of biodiesel oil to obtain final biodiesel oil is configured to include: a vaporization tower 430 that vaporizes the intermediate biodiesel oil led thereinto while being heated; a cooler 440 that cools and condenses the vaporized intermediate biodiesel oil led from the vaporization tower 430 to produce final biodiesel oil; and a pressure reducing mechanism 410 that reduces the pressure of the vaporization tower 430.

Description

  The present invention relates to a distillation purification apparatus for biodiesel oil used in a production system for producing biodiesel oil from edible waste oil or the like.

  Various systems for producing biodiesel oil (BDF (registered trademark)) that can be used as fuel for vehicles from edible waste oil have been proposed (see, for example, Patent Document 1 and Patent Document 2). In this type of biodiesel production system, raw material oil such as edible waste oil and methanol are transesterified by the action of an alkali (for example, potassium hydroxide KOH) catalyst to produce fatty acid methyl ester, and residual methanol. The final biodiesel oil is produced through various processes such as removal of impurities and removal of impurities such as washing with soap derived from free fatty acids. In addition, glycerin is by-produced during the production process.

JP 2008-111098 A JP 2012-57019 A

  By the way, as a production system for biodiesel oil, a batch type system in which various reactions are collectively performed in a large-capacity tank, and a continuous system in which various reactions are continuously performed in a relatively small reaction tower. A system of formulas is known. In general, batch-type systems have a large scale of equipment and can process a large amount at once. However, the work of replacing raw material liquids and product liquids becomes large, and overall efficiency is not necessarily good. I can't say that. On the other hand, in general, a continuous system cannot produce a large amount of biodiesel oil at a time, but can be realized with a small-scale facility, and since it can be continuously processed, it is relatively efficient as a whole. Biodiesel oil can be produced.

  The present invention has been made in view of such circumstances, and provides a distillation apparatus for distillation of biodiesel oil that can be applied to a continuous system and that can refine biodiesel oil more efficiently. Is.

  A biodiesel distillation purification apparatus according to the present invention is a biodiesel distillation purification apparatus that refines an intermediate biodiesel oil obtained in the process of producing biodiesel oil to obtain a final biodiesel oil, while heating. A vaporization tower for vaporizing the intermediate biodiesel oil to be led; a cooler for cooling and condensing the vaporized intermediate biodiesel oil led from the vaporization tower to produce a final biodiesel oil; and the vaporization treatment And a decompression mechanism for decompressing the tower.

  With such a configuration, the intermediate biodiesel oil obtained in the process of producing biodiesel oil is guided to the vaporization tower while being heated, and the intermediate biodiesel oil is vaporized under reduced pressure in the vaporization tower. Then, the vaporized intermediate biodiesel oil is condensed by cooling with a cooler to produce a final biodiesel oil.

  In the distillation purification apparatus for biodiesel oil according to the present invention, the intermediate biodiesel oil is heated while receiving the intermediate biodiesel oil and discharged toward the vaporization tower, and the condenser is connected to the condenser, A temporary storage unit that introduces and stores the final biodiesel oil obtained by the above, and the decompression mechanism decompresses the temporary storage unit, thereby depressurizing the vaporization tower via the cooler It can be set as the structure which has these.

  With such a configuration, the intermediate biodiesel oil is guided to the vaporization processing tower while being heated in the heating tower, and is vaporized in the vaporization treatment tower that is decompressed by the pump through the temporary storage unit and the cooler. . And the last biodiesel oil is produced | generated when the vaporized said intermediate | middle biodiesel oil is condensed with the said cooler, and is stored by a temporary storage part.

  In the biodiesel distillation purification apparatus according to the present invention, the first valve provided in the flow path between the pump and the temporary storage unit, and the flow path between the temporary storage unit and the atmosphere. The second valve, the third valve provided in the flow path between the cooler and the temporary storage section, and the fourth valve provided in the discharge flow path of the temporary storage section. be able to.

  With such a configuration, the temporary storage unit passes through the first valve by driving the pump with the first valve and the third valve opened and the second valve and the fourth valve closed. The pressure is reduced, the pressure reducing action is transmitted to the cooler, and the vaporization tower can be depressurized through the cooler. On the other hand, when the first valve and the third valve are closed, and the second valve and the fourth valve are opened, the temporary storage portion is opened to the atmosphere through the second valve, and then temporarily passed through the fourth valve. The final biodiesel oil can be discharged from the reservoir. At this time, since the third valve is in the closed state, the vaporization processing tower is rapidly returned to the atmosphere, and the final biodiesel accumulated in the temporary storage unit can be prevented from flowing back to the vaporization processing tower side.

  In the biodiesel distillation purification apparatus according to the present invention, each of the first valve, the second valve, the third valve, and the fourth valve is an electromagnetic valve and is stored in the temporary storage unit. An oil detector that detects that the final biodiesel oil has reached a predetermined amount, and when the oil detector detects that the final biodiesel oil stored in the temporary storage unit has reached the predetermined amount The valve drive control unit can be configured to close the first valve, open the second valve, close the third valve, and open the fourth valve.

  With such a configuration, when the oil detector detects that the biodiesel oil stored in the temporary storage unit has reached a predetermined amount, the first valve and the third valve are closed, and the second valve and the fourth valve are closed. Since the valve is opened, the final biodiesel can be recovered through the fourth valve from the temporary storage part opened to the atmospheric pressure.

  In the biodiesel distillation purification apparatus according to the present invention, the valve drive control unit may be configured to open the fourth valve for a predetermined time.

  With such a configuration, the final biodiesel oil can be collected from the temporary storage part opened to the atmospheric pressure through the fourth valve for a predetermined time. In this case, the predetermined time can be determined based on the relationship between the capacity of the recovery mechanism and the predetermined amount that is a reference for detection by the oil detector.

  In the biodiesel distillation purification apparatus according to the present invention, the valve drive control unit opens the first valve, closes the second valve, and closes the third valve when the predetermined time has elapsed. The fourth valve can be configured to be opened and closed.

  With such a configuration, since the last biodiesel oil is recovered from the temporary storage unit for the predetermined time, the first valve and the third valve are opened, and the second valve and the fourth valve are closed. By driving the pump, the temporary storage portion is depressurized through the first valve, and the depressurization action is transmitted to the cooler, and the second vaporization tower can be depressurized through the cooler. Then, methanol is removed and the filtered biodiesel oil is vaporized under reduced pressure in the second vaporization tower and condensed in the cooler to produce the final biodiesel oil. It is stored again in the temporary storage unit.

  According to the distillation purification apparatus for biodiesel oil according to the present invention, for example, the intermediate biodiesel oil obtained through steps such as transesterification and filtration is continuously treated by condensation by vaporization and cooling under reduced pressure. Since the final biodiesel oil is produced by the above, it can be applied to a continuous system, and the intermediate biodiesel oil is vaporized under reduced pressure, so the temperature is lower than the vaporization temperature at normal temperature. In addition, the intermediate biodiesel oil can be efficiently vaporized to produce the final biodiesel oil.

1 is a block diagram showing a basic configuration of a biodiesel production system to which a biodiesel distillation distillation apparatus according to an embodiment of the present invention is applied. It is a figure which shows the specific structural example of an ester reaction apparatus. It is a figure which shows the specific structural example of a methanol continuous collection | recovery apparatus. It is a figure which shows the specific structural example of a multistage filter apparatus. It is sectional drawing which shows the structure of each filter used for the multistage filter apparatus shown in FIG. It is a perspective view which shows the external appearance of the 1st sliding body provided in a filter. It is sectional drawing which shows the structure of a 1st sliding body. It is a perspective view which shows the external appearance of the 2nd sliding body provided in a filter. It is sectional drawing which shows the structure of a 2nd sliding body. It is sectional drawing which shows the state from which the bag body is discharged | emitted from the filter. It is a figure which shows the specific structural example of the distillation purification apparatus of the biodiesel oil which concerns on embodiment of this invention. It is a block diagram which shows the control system of the manufacturing system of biodiesel oil. It is a timing chart showing operation of each electromagnetic valve which controls pressure reduction and pressure reduction release of a temporary storage tank.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  A basic configuration of a biodiesel production system to which a biodiesel distillation distillation apparatus according to an embodiment of the present invention is applied is as shown in FIG.

  In FIG. 1, the biodiesel production system includes a raw material tank 10, a reaction liquid tank 11, an ester reaction device 100, a methanol recovery device 200, a multistage filtration device 300, and a distillation purification device 400. In the raw material tank 10, raw material oil prepared from edible waste oil or the like by a known method is stored. The reaction liquid tank 11 stores a reaction liquid prepared by mixing methanol and potassium hydroxide (KOH) functioning as an alkali catalyst. The ester reaction apparatus 100 mixes the raw material oil and the reaction liquid guided from the reaction liquid tank 11 while heating the raw material oil guided from the raw material tank 10, and converts the raw material oil and methanol into an alkali (potassium hydroxide KOH). A primary biodiesel oil mainly composed of fatty acid methyl ester together with glycerin is produced by transesterification by the action of the catalyst. The glycerin produced as a by-product in the ester reaction apparatus 100 can be collected and used separately.

  The methanol recovery apparatus 200 heats the primary biodiesel oil separated from the glycerin from the ester reaction apparatus 100 and vaporizes the methanol remaining in the primary biodiesel oil, and then condenses the liquid by cooling. Of methanol is recovered. Methanol recovered by the methanol recovery apparatus 200 can be used to generate a reaction liquid (mixed liquid of methanol and potassium hydroxide). As will be described later, the multistage filtration apparatus 300 has a structure in which a plurality of filters are connected in series, and the methanol-removed biodiesel oil guided from the methanol recovery apparatus 200 is filtered through the plurality of filters. Impurities and oil removed from the methanol-removed biodiesel oil in each filter of the filtration device 300 are separately collected. Further, the distillation purification apparatus 400 heats and vaporizes the filtered biodiesel oil (intermediate biodiesel oil) guided from the multistage filtration apparatus 300, and then condenses by cooling to generate the final diesel oil. . The residue after distillation purification in the distillation purification apparatus 400 is collected separately.

  Specifically, the ester reaction apparatus 100 is configured as shown in FIG.

  In FIG. 2, the ester reaction apparatus 100 includes a heating tower 105, a line mixer 111, and a reaction tower 120. A flow path C11 is formed between the raw material tank 10 and the heating tower 105, and a valve (valve) 101, a pump 102, a flow meter 102, a check valve 103, and a pressure gauge 104 are provided in the flow path C11. It has been. By driving the pump 102 with the valve 101 opened, the raw material oil stored in the raw material tank 10 is sequentially sent to the heating tower 105 through the flow path C11. The flow rate of the raw material oil flowing through the flow path C11 can be monitored by the flow meter 102, and the pressure of the raw material oil flowing through the flow path C11 can be monitored by the pressure gauge 104. The heating tower 105 is provided with a heater 105a, and the raw material oil led to the heating tower 105 is heated to a temperature of about 60 ° C. to 80 ° C., for example. The heating tower 105 is provided with a thermometer 106, and the temperature inside the heating tower 105 can be monitored by this thermometer 106.

  A flow path C12 is formed from the heating tower 105 toward the reaction tower 120, and a line mixer 111 is provided in the flow path C12. A flow path C13 extending from the reaction liquid tank 11 is connected to the upstream side of the line mixer 111 in the flow path C12, and a valve 107, a pump 108, a flow meter 109, and a check valve 110 are provided in the flow path C13. It has been. By driving the pump 108 with the valve 107 opened, the reaction liquid (mixed solution of methanol and potassium hydroxide) stored in the reaction tank 11 flows into the flow path C12 through the flow path C13. The flow rate of the reaction liquid flowing through the channel C13 can be monitored by the flow meter 109. The heated raw material oil from the heating tower 105 and the reaction liquid flowing into the flow path C12 from the flow path C13 flow into the line mixer 111, and the line mixer 11 sends the raw material oil and the reaction liquid to the reaction tower 120. Mix while guiding towards.

  The reaction tower 120 has a cylindrical body 121 (for example, a cylindrical shape). The cylinder 121 is made of a transparent material, for example, glass. The top surface of the cylinder 121 made of this transparent material is closed by a top plate 122, and the bottom surface of the cylinder 121 is closed by a funnel-shaped bottom plate 123. ing. The reaction tower 120 is provided with an inflow pipe 124 that enters the inside through the bottom plate 123. The inflow pipe 124 is connected to the flow path C12, and the raw material oil and the reaction liquid mixed by the line mixer 111 are guided from the flow path C12 to the reaction tower 120 (cylinder 121) through the inflow pipe 124. In addition, the reaction tower 120 is provided with a discharge pipe 125 that enters the inside through the center of the bottom plate 123. A valve 112 is provided in a discharge channel extending from the discharge pipe 125. When the valve 112 is opened, glycerin settled on the bottom of the reaction tower 120 can be discharged through the discharge pipe 125 as described later. . A feed channel Ctr1 extending to the outside through the top plate 122 is formed in the reaction tower 120, and the primary biodiesel oil is passed from the reaction tower 120 to the next-stage methanol recovery device 200 (see FIG. 1) through this feed channel Ctr1. ). A temperature sensor 113 is provided close to the surface of the cylindrical body 121 of the reaction tower 120, and the control device 20 (see FIG. 12) described later is based on the detection signal from the temperature sensor 113. Temperature can be monitored.

  In such an ester reaction apparatus 100, the raw material oil supplied while being heated in the heating tower 105 and the reaction liquid (methanol and potassium hydroxide) supplied from the reaction liquid tank 11 side are mixed by the line mixer 111. The raw material oil and the reaction liquid are introduced into the reaction tower 120 while the transesterification proceeds by mixing in the line mixer 111. In the reaction tower 120, the transesterification of the raw material oil and the reaction liquid in a mixed state led from the inflow pipe 124 on the bottom plate 123 side further proceeds while slowly convection. And by this transesterification reaction, fatty acid methyl ester (biodiesel oil) and glycerin are separated and produced, and glycerin having a large specific gravity settles on the bottom of the reaction tower 120 (cylinder 121). In this way, primary biodiesel oil mainly composed of fatty acid methyl ester together with glycerin is produced in the reaction tower 120.

  According to the ester reaction apparatus 100 described above, since the raw material oil heated by the line mixer 111 and the reaction liquid are mixed and led to the reaction tower 120 while the ester exchange reaction proceeds, The transesterification reaction with the reaction solution can proceed efficiently. Further, since the cylinder 121 of the reaction tower 120 is formed of a transparent material (for example, glass), the progress of the transesterification reaction is surely confirmed by visually confirming the degree of glycerin generation through the cylinder 121. Can be monitored. In addition, the glycerin (boundary between the glycerin and the primary biodiesel oil containing fatty acid methyl ester) that precipitates in the cylindrical body 121 (reaction tower 120) formed of a transparent material is optically provided without providing a light source. It can also be detected.

  The methanol recovery apparatus 200 is specifically configured as shown in FIG.

  In FIG. 3, the methanol recovery apparatus 200 includes a heating tower 210, a first vaporization processing tower 220, a cooler 230, and a recovery tank 240. A feed passage Ctr1 extending from the reaction tower 120 (see FIG. 2) of the ester reaction apparatus 100 reaches the heating tower 210. A pump 201 and a valve 202 are provided in the feed channel Ctr1. The primary biodiesel oil from the ester reaction apparatus 100 (reaction tower 120) is sent to the heating tower 210 by driving the pump 201 with the valve 202 opened. The heating tower 210 is provided with a heater 210a, and the primary biodiesel oil led to the heating tower 210 is heated to a temperature of about 80 ° C. to 100 ° C., for example. A flow path C21 is formed from the heating tower 210 toward the first vaporization processing tower 220, and the primary biodiesel oil heated by the heating tower 210 (for example, a temperature of about 80 ° C. to 100 ° C.) flows. It is supplied to the primary vaporization processing tower 220 through the path C21.

  The first vaporization treatment tower 220 is provided with a heater 221, and the primary biodiesel oil stored in the first vaporization treatment tower 220 is higher than the boiling point of methanol contained in the primary biodiesel oil. It is maintained at a predetermined temperature (temperature of about 80 ° C. to 100 ° C.) lower than the boiling point of diesel oil. Thereby, methanol is vaporized in the first vaporization treatment tower 220, and biodiesel oil from which methanol has been removed by vaporization remains in the primary vaporization treatment tower 220. The first vaporization tower 220 is provided with a liquid level sensor 222, and based on a detection signal from the liquid level sensor 222, the control device 20 (see FIG. 12) to be described later includes the first vaporization tower 220. The amount of accumulated methanol-removed biodiesel oil can be monitored. Further, a temperature sensor 223 is provided in the vicinity of the surface of the first vaporization processing tower 220, and the control device 20 also determines the temperature in the first vaporization treatment tower 220 based on a detection signal from the temperature sensor 223. Can be monitored.

  A flow path C22 extends from the top of the first vaporization processing tower 220 to the recovery tank 240, and a cooler 230 is provided in the flow path C22. Cooling water circulates in the cooler 230, and methanol vaporized in the first vaporization tower 220 is cooled and condensed when passing through the cooler 230 through the channel C <b> 22, and the liquefied methanol is recovered in the recovery tank. 240. The recovery tank 240 is provided with a liquid level sensor 241. Based on a detection signal from the liquid level sensor 241, the control device 20 (see FIG. 12) described later determines the amount of methanol accumulated in the recovery tank 240. Can be monitored. A valve 206 is provided in the discharge flow path of the recovery tank 240. By opening the valve 206, methanol accumulated in the recovery tank 240 can be sent to another facility. Further, the recovery tank 240 is provided with an odor removal filter 242, and the odor emitted from the methanol accumulated in the recovery tank 240 can be removed by the odor removal filter 242.

  On the other hand, a feed channel Ctr2 extends from the bottom of the first vaporization tower 220, and an electromagnetic valve 203 and a pump 204 are provided in the feed channel Ctr2. By driving the pump 204 with the electromagnetic valve 203 opened, the methanol-removed biodiesel oil accumulated in the first vaporization tower 220 is sent to the multistage filtration device 300 (see FIG. 1) through the feed channel Ctr2. A flow path C23 is branched from the feed flow path Ctr2, and a valve 205 is provided in the flow path C23. If the valve 205 is opened while the valve 203 is closed, the methanol-removed biodiesel oil accumulated in the first vaporization tower 220 can be taken out. The methanol-removed biodiesel oil thus taken out can be used for inspection such as component inspection.

  As described above, the control device 20 (see FIG. 12 to be described later) for monitoring the amount of methanol-removed biodiesel accumulated in the first vaporization processing tower 220 based on the detection signal from the liquid level sensor 222 has removed the methanol. When it is determined that the amount of biodiesel oil has exceeded a predetermined amount, the electromagnetic valve 203 is driven to open for a predetermined time and the pump 204 is driven. As a result, the methanol-removed biodiesel oil is sent from the first vaporization tower 220 through the feed channel Ctr2 to the multistage filtration apparatus 300 for the predetermined time. Thereafter, in the same manner, every time when the methanol-removed biodiesel oil accumulated in the first vaporization tower 220 reaches a predetermined amount, the methanol-treated biodiesel oil is removed from the second vaporization tower 220 for a predetermined time by the multistage filtration device. Sent to.

  Thus, in the process in which the methanol-removed biodiesel oil is intermittently and continuously sent from the first vaporization tower 220 to the multistage filtration device 300, the methanol-removed biodiesel oil liquid in the first vaporization tower 220 is obtained. The surface is maintained in a certain range with the position of the liquid level sensor 222 as the highest position. For this reason, the space for vaporizing methanol in the first vaporization tower 220 is limited to a certain range, and the vaporization of methanol is stably performed in the limited space. As a result, methanol can be efficiently recovered and the methanol component contained in the obtained biodiesel oil can be reduced as much as possible.

  In the above example, in order to maintain the liquid level height of the methanol-removed biodiesel oil in the first vaporization treatment tower 220 within a certain range, the liquid level sensor 222 detects the upper limit of the liquid level. Based on the detection signal, the methanol-removed biodiesel oil is discharged from the first vaporization processing tower 220 for a predetermined time, but the present invention is not limited to this. For example, by using a liquid level sensor for detecting the upper limit of the liquid level and a liquid level sensor for detecting the lower limit of the liquid level, the liquid level of biodiesel after methanol removal in the first vaporization treatment tower 220 is set to the upper limit and the lower limit. Can be maintained in between.

  The multistage filtration apparatus 300 is specifically configured as shown in FIG.

  In FIG. 4, the multistage filtration apparatus 300 includes a plurality of (for example, two) filters 320 a and 320 b and a tank 330. A feed channel Ctr2 extending from the first vaporization tower 220 of the methanol recovery apparatus 200 described above is connected to the inlet of one filter 320a. A check valve 301 and a valve 302 are provided in the feed channel Ctr2. With the valve 302 open, the above-described pump 204 (see FIG. 3) is driven (valve 203 is open), and the methanol removed biodiesel from the first vaporization treatment tower 220 of the methanol recovery apparatus 200 through the feed channel Ctr2. Oil is introduced into the filter 320a.

  A channel C31 extends from the outlet of the filter 320a, and a valve 305 is provided in the channel C31. A flow path C32 extends from between the filter 320a and the valve 305 in the flow path C31. Valves 306 and 308 are provided in the channel C32. As described above, the point between the check valve 301 and the valve 302 of the feed flow path Ctr2 extending from the methanol recovery apparatus 200 (first vaporization treatment tower 220) and the point between the valve 306 and the valve 308 of the flow path C32 A flow path C33 is formed between the two. The flow path C33 branches from the flow path C33 and extends to the inlet of the other filter 320b, and a valve 307 is provided in the flow path C34. A flow path C35 extends from the outlet of the filter 320b, and a valve 310 is provided in the flow path C31. Furthermore, a flow path C36 branched from between the filter 320b and the valve 310 of the flow path C35 extends to the tank 330. A valve 311 is provided in the flow path C36.

  Each of the filters 320a and 320b is provided with an oil release air supply port as will be described later. The oil draining air supply port of one filter 320a is connected to a high pressure air source via a valve 304, and the oil draining supply port of the other filter 320b is connected to a high pressure air source via a valve 309.

  The tank 330 stores filtered biodiesel oil guided through the flow path C36. The tank 330 is provided with two liquid level sensors 331 and 332 arranged in the vertical direction. Based on detection signals from the liquid level sensors 331 and 332, the control device 20 (see FIG. 12) described later can monitor the amount of filtered biodiesel oil accumulated in the tank 330. A feed flow path Ctr3 extends from the tank 330 toward the distillation purification apparatus 400 (see FIG. 1), and a valve 312 is provided in the flow path Ctr3.

  In the filtration device 300 having the above-described structure, the valves 302, 306, 307, and 311 are normally opened, and the other valves 303, 305, 308, and 310 are closed. In this state, the methanol-removed biodiesel oil supplied from the methanol recovery apparatus 200 (first vaporization tower 220: see FIG. 3) through the feed channel Ctr2 passes through one filter 320a, and then flows into the channel C31. , C32, C33, and C34, and the filtered biodiesel oil that has been guided to the other filter 320b and passed through the filter 320b is supplied to the tank 330 through the flow path C36.

  For example, in the state where the valves 302, 306, 308, 311 are opened and the other valves 303, 307, 305, 310 are closed, the methanol-removed biodiesel oil supplied through the feed channel Ctr2 is filtered on one side. After passing through the filter 320a, it is supplied to the tank 330 through the flow paths C31, C32 and C36 without passing through the other filter 320b. In this state, the filter 320b that is not used can be repaired, the filter medium can be replaced, and the like. Further, for example, in a state where the valves 303, 307, 311 are opened and the other valves 302, 306, 308, 310 are closed, the methanol-removed biodiesel oil supplied through the feed channel Ctr2 is filtered on one side. Without passing through the filter 320a, the liquid is guided to the other filter 320b through the flow paths C33 and C34, passed through the filter 320b, and then supplied to the tank 330 through the flow paths C35 and C36. In this state, it is possible to repair the filter 320a that is not used, replace the filter medium, and the like.

  Each filter 320a, 320b is provided with a pressure gauge 321a, 321b, and the pressure in the corresponding filter 320a, 320b can be monitored by each pressure gauge 321a, 321b. And based on the pressure in each filter 320a, 320b, the clogged state of the filter medium with which the said filter 320a, 320b was loaded can be judged.

  A specific structure of each of the filters 320a and 320b will be described with reference to FIGS.

  In FIG. 5, the filters 320 a and 320 b (hereinafter referred to as reference numeral 320 in the description of the filter) have a cylindrical tube 321. An end edge on one side of the cylinder body 321 has a flange shape, and a first lid 322 is fixed to the end edge by a plurality of bolts (not shown). The first lid 322 is closed. The other end of the cylindrical body 321 is also flanged, and the second lid 323 is fixed to the end by a plurality of bolts (not shown), and the other end of the cylindrical body 321 is connected to the other end. The second lid 323 is closed. A plurality of (for example, five) bag bodies 326a, 326b, 326c, 326d, and 326e in which a filter medium such as activated clay is accommodated are loaded in the cylinder 321. Each bag body 326a-326e is formed with natural fibers, such as cotton which is hard to receive a chemical influence from oil. An inlet IN is formed at the end of the cylinder 321 closed by the first lid 322, and an outlet OUT is formed at the end of the cylinder 321 closed by the second lid 323. Has been.

  An oil drain air supply port 327a for introducing a high-pressure gas (for example, air) when draining the oil in the filter 320 (cylinder body 321) is provided at the end of the cylinder body 321 where the inlet IN is provided. Is provided. Further, an oil discharge port 327b for guiding oil discharged from the cylinder 321 by the pressure of air supplied from the oil release air supply port 327a is also provided at the end portion of the cylinder 321 where the inlet IN is provided. ing. Further, the first lid 322 is provided with a high-pressure air supply port 328 for introducing a high-pressure gas (for example, air) into the cylinder 321.

  A first sliding body 324 and a second sliding body 325 are slidably loaded in the cylindrical body 321. The first sliding body 324 and the second sliding body 325 are arranged so as to sandwich the five bag bodies 326a to 326e. In other words, the first sliding body 324 corresponds to the inflow port IN between the bag body 326a located at the end on the first lid body 322 side of the five bag bodies 326a to 326e and the first lid body 322. The second sliding body 325 is disposed between the bag body 326e located at the end on the second lid body 323 side and the second lid body 322 out of the five bag bodies 326a to 326e. It is arranged to correspond to.

  The first sliding body 325 is configured as shown in FIGS. 6 and 7. 6 is a perspective view showing the appearance of the first sliding body 324, and FIG. 7 is a cross-sectional view showing the structure of the first sliding body 324.

  6 and 7, the first sliding body 324 has a structure in which a disk-shaped first plate 41 and a second plate 42 are connected by a plurality of support columns 43 arranged in a circular shape at equal intervals. Yes. A cylindrical body 44 having a mesh-shaped (or slit-shaped) through-hole is sandwiched between the first plate 41 and the second plate 42 so as to be surrounded by the plurality of support columns 43. A hole 42 a is formed at the center of the second plate 42 so as to correspond to the open end surface of the cylindrical body 44. A seal packing 45 made of, for example, urethane is provided on the outer surface of the first plate 41 so as to slightly protrude from the peripheral edge thereof. Similarly, a seal packing 46 is provided on the outer surface of the second plate. A cylindrical spacer member 47 is provided at a substantially central portion of the outer surface of the first plate.

  In a state where the first sliding body 324 having such a structure is placed in the cylindrical body 321 (see FIG. 5), the first plate 41 and the seal packing 45 (which constitute a closing portion) are connected to the bag body 326a. The cylindrical body 321 is closed between the first lid body 322 and the first lid body 322. The two seal packings 45 and 46 maintain the airtightness between the first sliding body 324 and the inner surface of the cylindrical body 321. As shown by broken line arrows in FIG. 7, the first sliding body 324 passes through the gaps of the plurality of support columns 43, the through holes of the cylindrical body 44, the open end surface of the cylindrical body 44, and the holes 42 a of the second plate 42. A flow path is formed. The methanol-removed biodiesel oil introduced into the cylindrical body 321 from the inflow port IN is guided to the side of the plurality of bags 326a to 326e through the flow path of the first sliding body 324. In addition, with the first sliding body 324 closest to the first lid body 322 side, the tip of the spacer member 47 abuts on the first lid 322, and the first lid 322 and the first sliding body 324 A gap is formed between the first plate 41 and the first plate 41.

  The second sliding body 325 is configured as shown in FIGS. FIG. 8 is a perspective view showing the appearance of the second sliding body 325, and FIG. 9 is a cross-sectional view showing the structure of the second sliding body 325.

  8 and 9, the second sliding body 325 has a disk plate 51 and a pressing ring plate 52. A flat cylindrical convex portion is formed at the center of the disc plate 51, and the disc plate 51 and the presser ring plate 52 are coupled so that the convex portion fits into the inner hole 52a of the presser ring plate 52. It is fixed. A seal packing 55 formed of, for example, urethane is provided on the outer surface of the presser ring plate 52 so as to slightly protrude from the peripheral edge thereof. A cylindrical portion 53 is coaxially provided on the surface of the disc plate 51 opposite to the surface to which the presser ring plate 52 is joined. A plurality of (for example, four) L-shaped stays and 54 arranged at equal intervals so as to surround the cylindrical portion 53 are respectively connected to the peripheral portion of the surface on which the cylindrical portion 53 of the disk plate 51 is formed and the cylindrical portion 53. It is formed between the disk plate 51 and the peripheral wall end on the opposite side. A plurality of slits 51 a are formed in the convex portion of the disk plate 51 so as to penetrate the disk plate 51.

  In a state where the second sliding body 325 having such a structure is placed in the cylinder 321 (see FIG. 5), the gap between the periphery of the presser ring plate 52 coupled to the disk plate 51 and the inner surface of the cylinder 321 is sealed. It is filled with packing 55. The combined disc plate 51, presser ring plate 52, and seal packing 55 (which constitute a closing portion) block the cylinder 321 between the bag 326e and the second lid 323. The second sliding body 325 includes a plurality of slits 51 a formed in the convex portion of the disk plate 51, a cylindrical portion 53, and a flow path that passes through the open end surface of the cylindrical portion 53, as indicated by a broken line arrow in FIG. 9. Is formed. The filtered biodiesel oil that has passed through the plurality of bags 326 a to 326 e (filter medium) is guided to the second lid 323 side through the flow path of the second sliding body 325. The filtered biodiesel oil flows out from the outlet OUT.

  In the filter 320 having such a structure, the methanol-removed biodiesel oil guided from the methanol recovery device 200 (see FIG. 1) flows in from the inlet IN, and the flow path of the first sliding body 324 (see FIG. 7). It is led to a plurality of bag bodies 326a-326e side through. The methanol-removed biodiesel oil is filtered by a filter medium (for example, activated clay) in each bag in the process of sequentially passing through the plurality of bags 326a to 326e. The filtered biodiesel oil that passes through the plurality of bag bodies 326a to 326e (filter medium) is guided to the second lid body 323 side through the flow path (see FIG. 9) of the second sliding body 325 and flows out. Outflow from OUT.

  Based on the pressure indicated by the pressure gauge 321a (321b: see FIG. 4) provided in each filter 320, it can be determined that the filter medium (bags 326a to 326e) is clogged. And exchange of the filter medium of each filter 320 can be performed as follows.

  First, the valve 302 (307: see FIG. 4) of the flow path Ctr2 (C34) following the inlet IN of the filter 320 (320a, 320b) and the flow paths C31, C32 (C35, C36: FIG. 4) following the outlet OUT. Valves 305 and 306 (310 and 311: see FIG. 4) are closed. In this state, high-pressure air is introduced into the cylinder 321 from the oil release air supply port 327a. Due to the pressure of the high-pressure air, oil (including biodiesel oil) remaining in the cylinder 321 is discharged from the oil discharge port 327b. Then, after the oil discharge from the oil discharge port 327b ceases to be discharged, the second lid 323 fixed with a bolt or the like is removed from the cylinder 321 and the end of the cylinder 321 on the second lid 323 side is opened. Is done. In this state, through the high-pressure air supply port 328 provided in the first lid body 322, the gap between the first lid body 322 and the first sliding body 324 (first plate 41) formed by the spacer member 47 is provided. High-pressure air is introduced at once. The first sliding body 324 slides in the cylindrical body 321 by the pressure of the high-pressure air introduced into the cylindrical body 321, and a plurality of bag bodies 326 a to 326 b pushed by the first sliding body 324 are shown in FIG. 10. As shown, the cylinders 321 are sequentially discharged from the open end.

  In this manner, the plurality of bags 326a to 326e (filter medium) in the cylinder 321 (filter 320) can be easily discharged from the cylinder 321. Then, bags 326a to 326e in which new filter media are stored are loaded from the opened end portion into the cylindrical body 321, and the second lid 323 is fixed to the opened end portion of the cylindrical body 321 to replace the filter media. Ends.

  The biodiesel distillation distillation purification apparatus 400 according to the embodiment of the present invention is specifically configured as shown in FIG.

  In FIG. 11, the distillation purification apparatus 400 includes a first heating tower 406, a second heating tower 408, a second vaporization processing tower 430, a cooler 440, a temporary storage tank 450 and a tank 460. A feed passage Ctr3 (see FIG. 4) extending from the filter 320b of the multistage filtration apparatus 300 described above reaches the first heating tower 406. The feed flow path Ctr3 is provided with a valve 401, a pump 402, a check valve 403, a flow meter 404, and an electromagnetic valve 405. By driving the pump 402 with the valve 401 and the electromagnetic valve 405 open, filtered biodiesel oil (intermediate biodiesel oil) is introduced into the first warmer 406 from the multistage filtration device 300 through the feed channel Ctr3. . The temperature of the filtered biodiesel oil flowing through the feed channel Ctr3 can be monitored by the thermometer 404.

  The first heating tower 406 is provided with a heater 406a, and the filtered biodiesel oil led to the first heating tower 406 is heated to a temperature of about 60 ° C. to 120 ° C., for example. The first heating tower 406 and the second heating tower 408 are connected in series by a flow path C41. The second heating tower 408 is provided with a heater 408a, and the filtered biodiesel oil led from the first heating tower 406 to the second heating tower 408 through the channel C41 is, for example, 120 ° C. to It is heated to a temperature of about 240 ° C. A flow path C42 is formed from the second heating tower 408 toward the second vaporization processing tower 430, and heating in the first heating tower 406 (for example, a temperature of about 60 ° C. to 120 ° C.) and second heating are performed. The filtered biodiesel oil that has been heated in the warm tower 408 (for example, a temperature of about 120 ° C. to 240 ° C.) is supplied to the second vaporization treatment tower 430 through the channel C42.

  The first heating tower 406 is provided with a thermometer 407, and the second heating tower 408 is provided with a thermometer 409, and these thermometers 407, 409 are used in the first heating tower 406. The temperature and the temperature in the second heating tower 408 can be monitored.

  The second vaporization treatment tower 430 is provided with a heater 431, and the filtered biodiesel oil stored in the second vaporization treatment tower 430 is maintained at a predetermined temperature of about 240 ° C. to 280 ° C., for example. The The filtered biodiesel oil heated while sequentially raising the temperature in the first heating tower 406, the second heating tower 408, and the second vaporization treatment tower 430 is vaporized in the second vaporization treatment tower 430, and the residue is first. It accumulates at the bottom of the 2-vaporization tower 430. In the second vaporization processing tower 430, a first liquid level sensor 432 is provided at a relatively upper position, and a second liquid level sensor 433 is provided at a lower position. Based on detection signals from the first liquid level sensor 432 and the second liquid level sensor 433, the control device 20 (see FIG. 12) described later monitors the amount of filtered biodiesel accumulated in the second vaporization processing tower 430. can do. In particular, based on the detection signal from the second liquid level sensor 433, the control device 20 can also monitor the amount of residue accumulated in the second vaporization processing tower 430. Further, a temperature sensor 434 is provided close to the surface of the second vaporization processing tower 430, and the control device 20 monitors the temperature in the second vaporization treatment tower 430 based on a detection signal from the temperature sensor 434. can do.

  A flow path C43 extends from the top of the second vaporization processing tower 430 to a temporary storage tank 450 (temporary storage section), and a cooler 440 and an electromagnetic valve 413 (third valve) are provided in the flow path C43. Yes. Cooling water circulates in the cooler 430, and the filtered biodiesel oil vaporized in the second vaporization processing tower 430 is cooled and condensed when passing through the cooler 440 through the channel C43, and the final biodiesel Oil is stored in the temporary storage tank 450 through the open electromagnetic valve 413. A decompression path Cv and an air release path Ca extend from the upper part of the temporary storage tank 450. A vacuum pump 410 and an electromagnetic valve 411 (first valve) are provided in the decompression path Cv, and an electromagnetic valve 412 (second valve) is provided in the atmosphere opening path Ca. A flow path C44 is formed from the bottom of the temporary storage tank 450 toward the tank 460, and an electromagnetic valve 414 (fourth valve), a valve 415, a check valve 416, and a pump 417 are provided in the flow path C44. It has been. By driving the pump 417 with the electromagnetic valve 414 and the valve 415 opened, the final biodiesel oil accumulated in the temporary storage tank 450 is supplied to the tank 460 through the flow path C44. The temporary storage tank 450 is provided with a liquid level sensor 451, and the control device 20 monitors the amount of final biodiesel oil accumulated in the temporary storage tank 450 based on a detection signal from the liquid level sensor 451. can do.

  The tank 460 for storing the final biodiesel oil is provided with a liquid level sensor 461, and the control device 20 monitors the amount of the final biodiesel oil stored in the tank 460 based on the detection signal from the liquid level sensor 461. be able to. Further, a valve 462 is provided in the discharge channel extending from the tank 460, and when the valve 462 is opened, the final biodiesel oil is discharged from the tank 460 through the discharge channel. The final biodiesel oil discharged from the tank 460 can be recovered by a predetermined recovery mechanism. Further, the tank 460 is provided with an odor removing filter 463, and the odor emitted from the final biodiesel oil accumulated in the tank 463 can be removed by the odor removing filter 463.

  A channel C45 extends from the bottom of the second vaporization processing tower 430. A valve 418, a cooling finned tube 419, a check valve 420, an electromagnetic valve 421, and a pump 422 are provided in the flow path C45. By driving the pump 422 in a state where the valve 418 and the electromagnetic valve 421 are opened, the residue accumulated in the second vaporization processing tower 430 passes through the flow path 45 and is discharged while being cooled by the pipe 419 with cooling fins. The residue discharged from the second vaporization tower 430 is collected separately.

  In the biodiesel production system described above, as shown in FIG. 12, the control device 20 includes a liquid level sensor group SS (liquid level sensors 222 and 241 (see FIG. 3), liquid level sensors 432, 433, 451, 461). Detection signals from the temperature sensor group SS (including the temperature sensor 113 (see FIG. 2), the temperature sensor 223 (see FIG. 3), and the temperature sensor 434 (see FIG. 11)). Based on these input signals, the solenoid valve group SV (including the solenoid valve 203 (see FIG. 3), the solenoid valves 405, 411, 412, 413, 414, 421 (see FIG. 11)), the heater group HT (heater) 105a (see FIG. 2), heaters 210a and 221 (see FIG. 3), heaters 406a, 408a and 431 (see FIG. 11)), vacuum pump VP 11 in FIG. 11) and the pump group PP (including pumps 102 and 108 (see FIG. 2), pumps 201 and 204 (see FIG. 3), and pumps 402, 417 and 422 (see FIG. 11)). . A display unit 21 and a storage unit 22 are connected to the control device 20, and the state (temperature, liquid (oil) amount) of each unit is determined based on detection signals from the liquid level sensor group SS and the temperature sensor group TS. Is displayed on the display unit 21 and stored in the storage unit 22 as necessary.

  For example, in the distillation purification apparatus 400, the control device 20 (valve drive control unit) drives and controls the electromagnetic valves 411, 412, 413, and 414 according to the timing chart shown in FIG. 13 in a state where the vacuum pump 410 is always driven. .

  When the electric valves 411 (first valve), 413 (third valve) are driven and open, and the electric valves 412 (second valve), 414 (fourth valve) are shut off and closed ( During the period until time t1 in FIG. 13, the decompression path Cv, the temporary storage tank 450 and the flow path C43 are in communication, and the operation of the vacuum pump 410 causes the temporary storage tank 450 to be depressurized through the electromagnetic valve 411 and its decompression action. Is transmitted to the cooler 440 through the electromagnetic valve 413, and the second vaporization processing tower 430 is depressurized through the cooler 440. Thereby, in the 2nd vaporization processing tower 430, heating of the filtered biodiesel oil is performed under reduced pressure, and the filtered biodiesel oil can be vaporized in a state where the boiling point is lowered. Accordingly, it is possible to suppress scorching of the filtered biodiesel oil in the second vaporization processing tower 430.

  Thus, the filtered biodiesel oil is vaporized under reduced pressure in the second vaporization processing tower 430, and the final biodiesel oil generated by the condensation in the cooler 430 is sequentially accumulated in the temporary storage tank 450. When it is detected at time t1 in FIG. 13 that the final biodiesel oil in the temporary storage tank 450 has reached a predetermined amount based on the detection signal from the liquid level sensor 451, the electromagnetic valves 411 and 413 are detected. Is shut off and closed, and immediately thereafter, the electromagnetic valves 412 and 414 are sequentially driven to open. As a result, the depressurization action of the second vaporization processing tower 430 via the temporary storage tank 450 and the cooler 440 is interrupted, and then the temporary storage tank 450 is opened to the atmosphere through the atmosphere release path Ca (electromagnetic valve 412). At this time, since the electromagnetic valve 413 is closed, the cooler 440 and the second vaporization processing tower 430 are suddenly returned to atmospheric pressure (normal pressure), and the final biodiesel accumulated in the temporary storage tank 450 flows. There is no backflow to the second vaporization tower 430 through the path C43. The driving of the pump 417 is started together with the driving of the electromagnetic valves 412, 414 described above, and the final biodiesel oil is sent from the temporary storage tank 450 opened to the atmosphere to the tank 460 through the channel C44.

  The driving of the pump 417 is continued for a predetermined time Δt (for example, about 5 seconds: until time t3) from the driving start time t2 of the electromagnetic valve 414 in FIG. 13, and during that time, the final biodiesel is transferred from the temporary storage tank 450 to the tank 460. Transfer continues. Then, at a time t3 after a predetermined time Δt from the time t2, the electromagnetic valve 414 is shut off and closed, and then the electromagnetic valve 412 is shut off sequentially and the electromagnetic valves 411 and 413 are driven. As a result, the pressure reducing action by the vacuum pump 410 reaches the second vaporization processing tower 430 via the temporary storage tank 450 and the cooler 440. After the time t3, the second vaporization treatment tower 430 has a filtered biodiesel. The oil is vaporized under reduced pressure, and after the condensation in the cooler 440, the final biodiesel oil is stored in the temporary storage tank 450 via the electromagnetic valve 413 (open state). Thereafter, as described above (see FIG. 13), drive control of the electromagnetic valves 411 to 414 and drive control of the pump 417 are performed.

  The pump 417 is driven, that is, the final biodiesel oil is discharged from the temporary storage tank 450. The predetermined time Δt is the final biodiesel oil in the temporary storage tank 450 detected by the liquid level sensor 451. And the discharge capacity of the final biodiesel oil by the pump 417 (recovery mechanism).

  The control device 20 further includes a pump provided in the feed flow path Ctr3 from the multistage filtration device 300 based on detection signals from the two liquid level sensors 432 and 433 provided for the second vaporization processing tower 430. For example, the drive control of 402 and the electromagnetic valve 405 and the drive control of the electromagnetic valve 421 and the pump 422 provided in the flow path C45 extending from the second vaporization processing tower 430 are performed as follows.

  If it is determined that the filtered biodiesel oil in the second vaporization processing tower 430 exceeds the first predetermined amount based on the detection signal from the liquid level sensor 432, the electromagnetic valve 405 is shut off and closed. 402 is stopped. Thereby, supply of the filtered biodiesel oil to the second vaporization processing tower 430 is stopped. When it is determined that the filtered biodiesel oil in the second vaporization processing tower 430 falls below a second predetermined amount smaller than the first predetermined amount based on the detection signal from the liquid level sensor 433, the electromagnetic valve 405 is The pump 402 is driven while being driven and opened. As a result, the filtered biodiesel oil is supplied to the second vaporization processing tower 430. In the process of repeating such operations, when the liquid level sensor 433 detects a residue (high concentration and viscosity) accumulated in the second vaporization tower 430, the electromagnetic valve 421 of the flow path C45 is driven to open. At the same time, the pump 422 is driven. Thereby, the residue accumulated in the second vaporization processing tower 430 is sent to the recovery facility (not shown) through the channel C45 while being cooled when passing through the pipe 419 with the cooling fin. At this time, the electromagnetic valve 413 provided in the flow path C43 is maintained in the open state, the electromagnetic valve 411 is switched to the closed state, and the electromagnetic valve 412 is switched to the open state. Thereby, as described above, the second vaporization processing tower 430 is returned to the atmospheric pressure (normal pressure) in the process in which the residue is discharged from the second vaporization processing tower 430. Thereby, a residue can be smoothly discharged | emitted from the 2nd vaporization processing tower 430. FIG.

  In the distillation purification apparatus 400, the second vaporization tower 430 is switched between a reduced pressure state and a normal pressure (atmospheric pressure) state, and the final biodiesel oil is recovered by driving control of the electromagnetic valves 411, 412, and 414. However, instead of the electromagnetic valves 411, 412, and 414, it can also be performed by manually opening and closing the valves.

  In the biodiesel production system described above, in the ester reaction apparatus 100, the raw material oil to be heated and the reaction liquid (including methanol and potassium hydroxide) are mixed and guided to the reaction tower 120. A primary biodiesel oil mainly composed of fatty acid methyl ester together with glycerin is produced by the transesterification reaction. Then, the primary biodiesel oil separated from glycerin is sequentially sent from the ester reaction device 100 to the methanol recovery device 200, methanol is removed from the primary biodiesel oil, and further, a filtration device 300 (five filtration devices). Containers 326a-326e) remove impurities (eg, soap components) from the methanol-removed biodiesel oil. The methanol is removed and the filtered biodiesel oil is sent from the multistage filtration apparatus 300 to the distillation purification apparatus 400, and the filtered biodiesel oil is vaporized and condensed in the distillation purification apparatus 400 under reduced pressure. The final biodiesel oil is produced through a distillation purification process. Thus, after the glycerol and primary biodiesel oil (fatty acid methyl ester) are produced | generated in the ester reaction apparatus 100, the primary biodiesel oil isolate | separated from glycerol is methanol collection | recovery in the methanol collection | recovery apparatus 200, multistage filtration. Since the final biodiesel oil is produced by sequentially performing the distillation purification by vaporization and condensation under reduced pressure in the apparatus 300 and the distillation purification apparatus 400, it is not a large facility such as a batch system. Further, a biodiesel oil with higher purity can be produced with a relatively small facility without using facilities such as washing of impurities (soap and the like) with water.

  In particular, according to the distillation purification apparatus 400, the filtered biodiesel oil (intermediate biodiesel oil) obtained through the processes in the methanol recovery apparatus 200 and the filtration apparatus 300 is vaporized under reduced pressure (second vaporization treatment tower 430). ) And cooling (cooler 440) to produce the final biodiesel oil by continuous treatment, so that it can be applied to a continuous system as described above, Since it is vaporized under reduced pressure, the final biodiesel oil can be generated by efficiently vaporizing the filtered biodiesel at a temperature lower than the vaporization temperature at room temperature.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a continuous system, has an effect that biodiesel oil can be refined more efficiently, and is used in a production system for producing biodiesel oil from edible waste oil or the like. It is useful as a distillation refiner for diesel oil.

DESCRIPTION OF SYMBOLS 10 Raw material tank 11 Reaction liquid tank 20 Control apparatus 21 Display part 22 Memory | storage part 41 1st plate 42 2nd plate 43 Support | pillar 44 Cylindrical body 45, 46 Seal packing 47 Spacer member 51 Disk plate 52 Holding ring plate 52a Inner hole 53 Cylindrical part 54 L-shaped stay 55 Seal packing 100 Ester reaction device 102 Pump 105 Heating tower 105a Heater 108 Pump 111 Line mixer 120 Reaction tower 200 Methanol recovery device 201, 204 Pump 210 Heating tower 210a Heater 220 First vaporization tower 221 Heater 230 Cooler 240 Recovery tank 300 Multi-stage filter device 320a, 320b Filter 321 Cylindrical body 322 First lid body 323 Second lid body 324 First sliding body 325 Second sliding body 326a to 326e Bag body (filter Material)
327a Oil-removed air supply port 327b Oil discharge port 328 High-pressure air supply port 330 Tank 400 Distillation purification device 402, 417, 422 Pump 405, 411, 412, 413, 414 Electromagnetic valve 406, 408 Heating tower 406a, 408a Heater 410 Vacuum pump 430 Second vaporization processing tower 431 Heater 440 Cooler 450 Temporary storage tank 460 Tank

Claims (6)

A biodiesel distillation purification apparatus for refining an intermediate biodiesel oil obtained in the process of producing biodiesel oil to obtain a final biodiesel oil,
A vaporization tower for vaporizing the intermediate biodiesel oil guided while heating;
A cooler that cools and condenses the vaporized intermediate biodiesel led from the vaporization tower to produce the final biodiesel;
An apparatus for distilling and purifying biodiesel oil having a decompression mechanism for decompressing the vaporization tower. A heating tower that receives and heats the intermediate biodiesel oil and discharges it toward the vaporization tower;
A temporary storage unit connected to the cooler for introducing and storing the final biodiesel oil obtained by condensation in the cooler;
The said pressure reduction mechanism is a distillation purification apparatus of the biodiesel oil of Claim 1 which has a pump which pressure-reduces the said vaporization processing tower via the said cooler by decompressing the said temporary storage part. A first valve provided in a flow path between the pump and the temporary storage unit;
A second valve provided in a flow path between the temporary storage unit and the atmosphere;
A third valve provided in a flow path between the cooler and the temporary storage unit;
The apparatus for distilling and purifying biodiesel oil according to claim 2, further comprising a fourth valve provided in a discharge channel of the temporary storage unit. Each of the first valve, the second valve, the third valve, and the fourth valve is an electromagnetic valve,
An oil detector for detecting that the final biodiesel oil stored in the temporary storage unit has reached a predetermined amount;
When the oil detector detects that the final biodiesel oil stored in the temporary storage unit has reached the predetermined amount, the first valve is closed, the second valve is opened, and the first The distillation purification apparatus for biodiesel oil according to claim 3, further comprising a valve drive control unit that closes three valves and opens the fourth valve.   The biodiesel distillation distillation purification apparatus according to claim 4, wherein the valve drive control unit opens the fourth valve for a predetermined time. The valve drive control unit opens the first valve, closes the second valve, opens the third valve, and closes the fourth valve when the predetermined time has elapsed. The biodiesel production system as described.

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