Heat source system for distilled spirits production and exhaust heat recovery and supply method using the same

Abstract

We provide a heat source system for distilled spirits production that is energy-efficient, reduces running costs, and contributes to carbon neutral efforts. [Solution] The heat source system comprises pot stills (11, 17) fitted with heat exchangers (12, 18) and coolers (13, 19), a steam boiler (1) that generates heated steam and supplies some of the heated steam to the heat exchangers (12, 18), a hot water tank (2) that stores water for producing distilled spirits and heats the water using the heated steam, a heat exhaust tank (24) that collects the heated steam that has passed through the heat exchangers (12, 18 and turned into condensed water and the refrigerant that has passed through the coolers (13, 19) and turned into hot water to recover the exhaust heat, a heat pump (23) that receives the exhaust heat recovered in the heat exhaust tank (24), and a recovered exhaust heat return line (L5) that sends water stored in the hot water tank (2) to the heat pump (23) and returns the water that has been heated by receiving the exhaust heat from the heat pump (23) to the hot water tank (2).

Description

[Technical Field]

[0001] The present invention relates to a heat source system for an apparatus for producing distilled spirits such as whiskey, and more particularly to the effective use of waste heat generated during production. [Background technology]

[0002] (Distillation using a pot still) Distilled alcoholic beverages (such as whiskey) are made by crushing and saccharifying malt such as barley, rye, or corn, adding yeast to ferment it, and then distilling and aging it. A specially shaped copper vessel called a pot still is used to distill the fermented liquid (mash), and whiskey production typically uses a continuous distillation apparatus in which multiple pot stills are arranged in series (see Patent Document 1).

[0003] (Traditional heat sources and their problems) The heat source required for this distillation is usually heated steam generated in a steam boiler, which is supplied to a pot still to heat the fermentation liquid. However, after fulfilling its purpose (heating the fermentation liquid), the heat medium (heated steam) is discarded as waste hot water, so it is difficult to say that the thermal energy is being fully utilized. Furthermore, because the operation of a steam boiler also generates greenhouse gases such as carbon dioxide, there is a desire to reduce its operating time as much as possible.

[0004] (Prior technology aimed at energy conservation) The device disclosed in Patent Document 2 is an example of prior art aimed at producing distilled spirits inexpensively and with low energy consumption. However, this device aims to save energy by storing and heating the fermented liquid before pouring it into a pot still in multiple tanks with different purposes, and by increasing the temperature and alcohol content of the fermented liquid before distillation. However, it is not intended to recover heat from the waste hot water generated in the pot still distillation process.

[0005] The distillation apparatus of Patent Document 1 mentioned above is characterized by the fact that steam extracted in a separator placed in a cooling water circuit attached to the pot still is compressed by a mechanical compressor in order to maintain the quality of the whiskey, and this is then supplied to a heat exchanger by a steam injection pump; like Patent Document 2, it is not intended to recover heat from the waste hot water generated in the pot still distillation process. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Special Publication No. 2017-536133 [Patent Document 2] Japanese Patent Application Laid-Open No. 2017-006056 Summary of the Invention [Problem to be solved by the invention]

[0007] (Object of the present invention) The present invention has been made in view of the above circumstances, and aims to provide a heat source system for producing distilled spirits that is energy-efficient and reduces running costs.

[0008] Another object of the present invention is to provide a heat source system that contributes to carbon neutral efforts in the field of distilled spirits production. [Means for solving the problem]

[0009] After extensive research, the inventors came up with the idea of ​​incorporating a heat pump into a distillation apparatus to recover heat from the hot waste water generated in the pot still distillation process. They discovered that the above-mentioned problems could be successfully solved by effectively utilizing the recovered thermal energy, and thus completed the present invention.

[0010] That is, the present invention has, for example, the following configurations and features. (Aspect 1) a pot still equipped with a heat exchanger and a cooler; a steam boiler that generates heating steam and supplies a portion of the heating steam to the heat exchanger; a hot water storage tank for storing water for producing distilled liquor and for heating the water using a part of the heating steam; a heat exhaust tank for collecting the heated steam that has passed through the heat exchanger and turned into condensed water and the refrigerant that has passed through the cooler and turned into hot water, and recovering exhaust heat; a heat pump that receives the exhaust heat recovered in the exhaust heat tank; a recovered waste heat return line that sends the water stored in the hot water storage tank to the heat pump and returns the water heated by receiving the waste heat from the heat pump to the hot water storage tank; Equipped with A heat source system for producing distilled spirits. (Aspect 2) a circulation line for exhaust heat transfer that circulates a heat medium for exhaust heat transfer between the heat pump and the exhaust heat tank is further provided; In the exhaust heat transfer circulation line, the inlet temperature T1 of the heat transfer medium is the upper limit temperature T at which the heat pump can operate. u The temperature of the inlet temperature T1 itself or the flow rate of the heat transfer medium for exhaust heat is adjusted so that 2. A heat source system for producing distilled spirits according to claim 1. (Aspect 3) A boiler condensate recycling line is connected between the steam boiler and the heat exhaust tank, and sends the heated steam used to heat the water in the hot water storage tank as condensate to the heat exhaust tank. 3. The heat source system for producing distilled spirits according to claim 1 or 2. (Aspect 4) a preheating heat exchanger provided upstream of the pot still and configured to heat the fermented liquid or distilled liquid supplied to the pot still; a preheating heat medium circulation line that sends hot water heated in the hot water storage tank to the preheating heat exchanger and returns the hot water that has received and exchanged heat in the preheating heat exchanger to the hot water storage tank; Further comprising: 3. The heat source system for producing distilled spirits according to claim 1 or 2. (Aspect 5) A step S1 of storing water for producing distilled spirits in a hot water storage tank; a step S2 of operating a steam boiler to generate heated steam and using the heated steam to heat the water in the hot water tank to a set temperature; Steps S7 and S7b include operating the steam boiler to generate heating steam and supplying the heating steam to a heat exchanger attached to the pot still, thereby heating the fermented liquid or distilled liquid in the pot still to a set temperature; Steps S8 and S8b of preparing a heat exhaust tank capable of heat exchange with a heat pump and sending condensed water of the heating steam that has passed through the heat exchanger to the heat exhaust tank through a condensed water reuse line; After the liquid temperature of the fermented liquid or the distilled liquid reaches a set temperature, steps S9 and S9b are performed to maintain the liquid temperature while adjusting the amount of heating steam to the heat exchanger; Steps S10 and S10b of supplying refrigerant to a cooler attached to the pot still and supplying water to the hot water tank; Steps S11 and S11b of sending the condensed water that has passed through the heat exchanger to the heat exhaust tank through a condensed water reuse line, and sending the refrigerant that has passed through the cooler and received heat to the heat exhaust tank through a cooling water reuse line; a step S12 of flowing the water in the hot water storage tank through a heat recovery exhaust heat return line so that the water passes through the heat pump and returns to the hot water storage tank; a step S13 of operating the heat pump when the waste hot water containing the condensed water and the refrigerant is stored in the waste heat tank up to a set amount, recovering waste heat from the waste hot water in the waste heat tank through a waste heat transfer circulation line, heating the water in the recovered waste heat return line, and returning it to the hot water storage tank; The water in the hot water storage tank is at a temperature T at which the heat pump can operate. o a step S15 of stopping the heat pump once the temperature has reached the temperature; a step S16 of operating the steam boiler to supply the heated steam to the hot water tank, heating the water in the hot water tank to a set temperature, and keeping the water warm; and After performing step S16, the process returns to steps S7 and S7b, and the processes of steps S7, S7b to S16 are repeated. A method for recovering and supplying exhaust heat using a heat source system for producing distilled spirits. (Aspect 6) After the step S13 is performed, the inlet temperature T1 of the cooling side heat transfer medium of the exhaust heat transfer circulation line is the upper limit temperature T u The inlet temperature T1 itself or the flow rate of the cooling side heat medium is adjusted so as to become, 6. The method for recovering and supplying exhaust heat according to claim 5, (Aspect 7) The steam boiler and the waste heat tank are connected in advance by a boiler condensate recycle line, and The method further includes a step of sending the heated steam used to heat the water in the hot water storage tank as condensed water to the heat exhaust tank when the steam boiler is operated in the step S2 or the step S16. 7. The method for recovering and supplying exhaust heat according to aspect 5 or 6. (Aspect 8) a preheating heat exchanger for preheating the fermentation liquid or the distillation liquid supplied to the pot still is further provided; The method further includes steps S6 and S6b of preheating the fermented liquid or the distilled liquid by supplying the water heated in the hot water storage tank to the preheating heat exchanger before carrying out step S7, and After step S16 is performed, the process returns to steps S6 and S6b, and the processes of steps S6, S6b to S16 are repeated. 7. The method for recovering and supplying exhaust heat according to aspect 5 or 6. [Effects of the Invention]

[0011] Conventional methods have relied solely on steam boilers as a heat source for producing distilled spirits, but the heat source system of the present invention uses a steam boiler in combination with a heat pump to recover and reuse the exhaust heat that would otherwise be wasted during distillation in a pot still, thereby saving energy and reducing running costs, enabling the production of distilled spirits that can also contribute to carbon-neutral efforts. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a conventional distilled liquor production apparatus. [Figure 2] 1 is a flowchart showing a conventional method for producing distilled spirits. [Figure 3] 1 is a diagram showing a schematic configuration of a distilled spirits production apparatus according to an embodiment of the present invention. [Figure 4] 1 is a flowchart showing a method for producing a distilled spirit according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] The technical contents of the present invention will be described below based on the following specific embodiments with reference to the accompanying drawings, but the present invention is not limited to these embodiments in any way.

[0014] (conventional distillation equipment) As described above, the present invention is characterized by recovering heat from the waste hot water generated in the pot still distillation process (hereinafter also referred to as "with waste heat recovery"). To clarify this feature, a conventional distillation apparatus and its heat source system that does not recover heat (hereinafter also referred to as "without waste heat recovery") will be described first.

[0015] (Steam boiler and hot water tank) Figure 1 shows the schematic configuration of a conventional distilled spirits production apparatus and its heat source system (hereinafter referred to as the "conventional apparatus"). The conventional apparatus is equipped with a steam boiler 1, which serves as a heat source, and a hot water tank 2, which stores water supplied by a groundwater pump 22. A heat exchanger 3 is attached to the hot water tank 2, and by supplying heated steam generated by the steam boiler 1 to this heat exchanger 3, the water in the hot water tank 2 can be heated to a set temperature.

[0016] (saccharification tank) The conventional apparatus is equipped with a saccharification tank 5, also known as a mash tun, and a fermentation tank 8, also known as a washback. Crushed malt (grist) and hot water are fed into the saccharification tank 5. When the grist is stirred in the saccharification tank 5, a starchy mixture (mash) is produced, which is then filtered to produce wort. Hot water is supplied to the saccharification tank 5 from the hot water storage tank 2 described above by a pump 4.

[0017] (Fermentation tank) By driving pump 6, the wort is supplied from saccharification tank 5 to fermentation tank 8, during which time it is cooled as it passes through heat exchanger 7. Specifically, water supplied from groundwater pump 22 removes heat from the wort in heat exchanger 7, and is then supplied as hot water to hot water storage tank 2. In fermentation tank 8, yeast is added and the wort is fermented, producing a fermented liquid (mash, wash) with an alcohol content of about 7%.

[0018] (Distiller) Conventional apparatuses are equipped with distillers 11, 17 called pot stills. Conventional apparatuses include those using a single distiller (single-column distiller) and those using multiple distillers 11, 17 connected in series as shown in Figure 1. Here, the upstream distiller is called the first pot still 11, and the downstream distiller is called the second pot still 17. Pot stills 11, 17 are equipped with distillation stills 11a, 17a that receive the fermentation liquid (or distillation liquid) supplied by pump 9 from fermenter 8 and heat and evaporate it, and coolers (condensers) 13, 19 that cool and condense the steam (vaporized fermentation liquid (distillation liquid)) supplied from distillation stills 11a, 17a. Heat exchangers 12, 18 attached to pot stills 11, 17 utilize the heating steam generated during operation of steam boiler 1 as a heat source to heat the fermentation liquid (or distillation liquid) in distillation stills 11a, 17a to a set temperature.

[0019] (Storage tank) The fermented liquid evaporates in pot stills 11 and 17 and is condensed in coolers 13 and 19 to become a distillate (new pot) with a higher alcohol content, which is then stored in storage tanks 14 and 20. Typically, the alcohol content of the distillate stored in the first (first distillation) storage tank 14 is about 22-25%, and the alcohol content of the distillate stored in the second (second distillation) storage tank 20 is about 70%. After second distillation, the distillate is poured from storage tank 20 into barrels 21, aged, and then bottled as distilled spirits.

[0020] Next, we will explain the conventional method (without waste heat recovery) for supplying heat to a distilled spirits production apparatus. The flowchart is shown in Figure 2.

[0021] (Water supply and heating process to hot water tank) The groundwater pump 22 is operated to store water in the hot water storage tank 2 (step S1). Next, the steam boiler 1 is operated to generate heated steam, and this heated steam is supplied to the heat exchanger 3 attached to the hot water storage tank 2, thereby heating the water in the hot water storage tank 2 to a set temperature (step S2).

[0022] (Hot water supply to saccharification tank) The hot water in the hot water storage tank 2 prepared in step S2 is supplied to the saccharification tank 5 by driving the pump 4 (step S3). When this hot water is stirred with the crushed malt in the saccharification tank 5, a mash is produced, and by filtering this, wort is produced.

[0023] (Supplying wort to the fermentation tank) By driving pump 6, wort is supplied from saccharification tank 5 to fermentation tank 8 (step S4). During this time, the wort passes through heat exchanger 7 and is cooled. That is, water supplied from groundwater pump 22 enters heat exchanger 7 as a refrigerant, removes heat from the wort, and is sent to hot water storage tank 2. In fermentation tank 8, yeast is added and the wort is fermented to produce a fermented liquid (mash, wash).

[0024] (Feeding of fermented liquid to the first pot still and initial distillation) Pump 9 is driven to supply the fermented liquid from fermenter 8 to first pot still 11 (step S5). Steam boiler 1 is operated to generate heated steam, which is supplied to heat exchanger 12 attached to first pot still 11, thereby heating the fermented liquid in first pot still 11 to a set temperature (step S7). After the temperature of the fermented liquid reaches the set temperature, the amount of heated steam supplied to heat exchanger 12 is adjusted to maintain that temperature (step S9). Note that the heated steam that has passed through heat exchanger 12 in steps S7 and S9 and fulfilled its purpose is usually discarded in a drain (not shown). After step S9, groundwater pump 22 is operated to flow water into cooler 13 and supply water to hot water tank 2 (step S10). Through these operations, the fermented liquid becomes steam in still 11a, is cooled and condensed in cooler 13, and is stored in storage tank 14.

[0025] (Distillate supplied to the second pot still and re-distilled) In the case of a continuous still, the same distillation process is performed again. Pump 15 is driven to supply the distillate from storage tank 14 to second pot still 17 (step S5b). Steam boiler 1 is operated to generate heated steam, which is supplied to heat exchanger 18 attached to second pot still 17, thereby heating the distillate in second pot still 17 to a set temperature (step S7b). After the temperature of the distillate reaches the set temperature, the amount of heated steam supplied to heat exchanger 18 is adjusted to maintain that temperature (step S9b). Then, groundwater pump 22 is operated to flow water into cooler 19 and supply water to hot water tank 2 (step S10b). Through these operations, the distillate becomes steam in still 17a, is cooled and condensed in cooler 19, and is stored in storage tank 20.

[0026] (The process of heating and keeping the water warm in the hot water tank) Once the above-mentioned step S10b has been carried out, the distillation is generally completed, but to continue the distillation, it is necessary to heat and keep the water in the hot water storage tank 2 warm (step S16). Specifically, the steam boiler 1 is operated and heated steam is supplied to the heat exchanger 3 attached to the hot water storage tank 2, thereby heating the water in the hot water storage tank 2 to the set temperature. Then, the operation of the steam boiler 1 is continued, and the hot water in the hot water storage tank 2 is kept warm at the set temperature. [Example]

[0027] (Heat source system for producing distilled spirits of the present invention) Next, the configuration of an apparatus of the present invention equipped with a mechanism for "with exhaust heat recovery" will be described. Figure 3 shows a schematic configuration of a distilled spirits production apparatus and heat source system of the present invention. The production apparatus of the present invention basically includes the components of the conventional production apparatus described above (e.g., steam boiler 1, hot water storage tank 2 and its associated heat exchanger 3, saccharification tank 5, wort cooling heat exchanger 7, fermenter 8, first and second pot stills 11 and 17 and their associated heat exchangers 12 and 18, coolers 13 and 19, storage tanks 14 and 20, groundwater pump 22, pumps 4, 6, 9 and 15, and barrel 21), and a detailed description of these components will be omitted, with only the additional components being described below.

[0028] (Preheating heat exchanger) First, the manufacturing apparatus of the present invention is characterized in that preheating heat exchangers 10, 16 are provided upstream of each of pot stills 11, 17. For example, plate-type heat exchangers can be used as these preheating heat exchangers 10, 16, and a preheating heat medium circulation line L1 is provided that passes a heat medium (heated steam) from hot water storage tank 2 through preheating heat exchangers 10, 16 by driving pump 4, and imparts heat of the heat medium to (preheats) the fermentation liquid (distillate in the case of re-distillation) before returning to hot water storage tank 2.

[0029] (Heat pump and exhaust heat tank) It should be noted that the manufacturing apparatus of the present invention is further equipped with a heat pump 23 and a heat exhaust tank 24. A condensed water reuse line L2 is connected to the heat exhaust tank 24, and heated steam (water condensed by passing through) that has passed through the heat exchangers 12, 18 of the pot stills 11, 17 is sent to the heat exhaust tank 24 via this condensed water reuse line L2. A cooling water reuse line L3 is also connected to the heat exhaust tank 24, and refrigerant that has undergone heat exchange (heating) in the coolers 13, 19 is sent to the heat exhaust tank 24 via this cooling water reuse line L3. The condensed water and refrigerant contained in the heat exhaust tank 24 (collectively referred to as "exhaust hot water") are drained from the heat exhaust tank 24 to a drain (not shown) after imparting heat (exhaust heat) to the heat pump 23 side.

[0030] (Return of recovered waste heat) Between the heat pump 23 and the heat exhaust tank 24, there is provided a heat transfer circulation line L4 through which a heat medium for heat transfer circulates, and a pump 25 for circulating this heat medium. A recovered heat return line L5 that connects the hot water tank 2 and the heat pump 23 is also connected to the heat pump 23. The water (heating-side heat medium) stored in the hot water tank 2 flows into the heat pump 23 through the recovered heat return line L5, receives waste heat from the heat transfer circulation line L4, and is returned to the hot water tank 2 as hot water.

[0031] (Use of recovered exhaust heat (reuse)) In this way, the heat pump 23 and the heat exhaust tank 24 recover the exhaust heat and collect it in the heat medium in the hot water storage tank 2. Therefore, the recovered heat is reused not only to supply hot water to the saccharification tank 5 but also to preheat the preheating heat exchangers 10 and 16.

[0032] In this embodiment, the heat pump 23 and the circulation line L4 for exhaust heat transfer are separately and independently arranged outside the exhaust heat tank 24, but this is not limited to this example. For example, the heat pump 23 and the circulation line L4 for exhaust heat transfer may be built into the exhaust heat tank 24.

[0033] As shown in FIG. 3, a boiler condensate recycle line L is provided between the steam boiler 1 (specifically, the heat exchanger 3 attached to the hot water storage tank 2) and the waste heat tank 24. 2’ Alternatively, the condensed water (waste hot water) of the heated steam that is generated in the steam boiler 1 and passes through the heat exchanger 3 to heat the heat medium (water) in the hot water storage tank 2 may be collected in the waste heat tank 24.

[0034] (Distilled spirits production using the waste heat recovery method of the present invention) Next, a method of supplying heat to a distilled spirits production apparatus (with exhaust heat recovery) according to the present invention will be described. A flowchart of the method is shown in Figure 4. The method of the present invention also carries out the steps carried out in the conventional method (without exhaust heat recovery) described above, except for some steps (steps enclosed by double lines in Figure 4) which will be described later.

[0035] (hot water storage, saccharification, fermentation) That is, the steps are the same as those of the conventional method as follows: Groundwater pump 22 is operated to store water in hot water storage tank 2 (step S1). Next, steam boiler 1 is operated to generate heated steam, and this heated steam is supplied to heat exchanger 3 attached to hot water storage tank 2, thereby heating the water in hot water storage tank 2 to a set temperature (step S2). The hot water in hot water storage tank 2 prepared in the above-mentioned step S2 is supplied to saccharification tank 5 by driving pump 4 (step S3). Pump 6 is driven to supply wort from saccharification tank 5 to fermentation tank 8 (step S4). During this time, the wort passes through heat exchanger 7 and is cooled. Pump 9 is driven to supply fermented liquid from fermentation tank 8 to first pot still 11 (step S5).

[0036] (Preheating the fermented liquid (moromi) or distilled liquid) However, it should be noted that in the present invention, the fermented liquid is preheated at the same time as step S5. Specifically, pump 4 is operated to supply hot water in hot water storage tank 2 to preheating heat exchanger 10 (step S6). The hot water that has passed through preheating heat exchanger 10 and exchanged heat is returned to hot water storage tank 2. The fermented liquid preheated in step S6 is supplied to first pot still 11. Note that a similar preheating heat exchanger 16 is also installed upstream of second pot still 17, and the distilled liquid is preheated (step S6b) when the distilled liquid is supplied from storage tank 14 to second pot still 17 (step S5b).

[0037] (Increasing the temperature of the fermented liquid (or distilled liquid) and reusing the wastewater) After steps S6 and S6b relating to preheating, as in the conventional method, steam boiler 1 is operated to generate heating steam, and this heating steam is supplied to heat exchangers 12 and 18 attached to first and second pot stills 11 and 17, thereby heating the fermented liquid (or distilled liquid) in first and second pot stills 11 and 17 to a set temperature (steps S7 and S7b). Condensed water from the heating steam that has passed through heat exchangers 12 and 18 is sent to waste heat tank 24 through condensate reuse line L2 (steps S8 and S8b).

[0038] (Distillation of fermented liquid (re-distillation of distilled liquid) and reuse of stored hot water and waste hot water) After the temperature of the fermented liquid (or distilled liquid) reaches the set temperature, the temperature is maintained by adjusting the amount of heating steam sent to the heat exchangers 12, 18 (steps S9, S9b). Thereafter, the groundwater pump 22 is operated to flow water into the coolers 13, 19 and supply water to the hot water storage tank 2 (steps S10, S10b). The condensed water of the heating steam that has passed through the heat exchangers 12, 18 is sent to the heat exhaust tank 24 through the condensed water reuse line L2, and the refrigerant that has passed through the coolers 13, 19 and received heat is sent to the heat exhaust tank 24 through the cooling water reuse line L3 (steps S11, S11b).

[0039] The pump 4 is operated to cause the water in the hot water storage tank 2 to flow through the heat pump 23 and return to the hot water storage tank 2 through the recovered waste heat return line L5 (step S12). When a sufficient amount of waste hot water is stored in the waste heat tank 24, the heat pump 23 is operated to recover waste heat from the waste heat tank 24 via the waste heat transfer circulation line L4, and the water in the recovered waste heat return line L5 is heated and returned to the hot water storage tank 2 (step S13). The amount of stored waste hot water, which is one of the triggers for starting and stopping the heat pump 23, can be detected, for example, by attaching a water level gauge to the waste heat tank 24. In this embodiment, step S12 is performed before step S13, but step S12 may also be performed immediately before the heat pump 23 is operated in step S13.

[0040] In order to recover the exhaust heat with high efficiency in the heat pump 23, it is preferable to carry out the following step S14. That is, the (cooling side) heat medium inlet temperature T1 from the exhaust heat tank 24 to the heat pump 23 is set to the upper limit temperature T u The flow rate of the cooling-side heat medium is adjusted so that the cooling-side heat medium inlet temperature T1 becomes equal to or greater than the predetermined value (step S14). Note that the cooling-side heat medium inlet temperature T1 may also be controlled by a method in which a cooler such as a fan cooler 26 is disposed on the cooling-side heat medium inlet side of the heat pump 23 and the inlet temperature T1 itself is directly controlled.

[0041] In this specification, the "cooling side" is considered to be based on the heat pump 23, and the side where the exhaust heat transfer circulation line L4 is located is called the "cooling side," and the side where the recovered exhaust heat return line L5 is located is called the "heating side."

[0042] When performing step S14, the flow rate is adjusted on the heat pump 23 side due to the following constraints. 1) The temperature of the wastewater stored in the heat exhaust tank 24 cannot be controlled. 2) The smaller the difference between the heating temperature and the cooling temperature, the better the heat pump 23 can operate with respect to energy consumption efficiency (COP). 3) The heat pump 23 has a limit on the inlet temperature of both the heating-side heat medium and the cooling-side heat medium. The flow rate can be adjusted by appropriately controlling, for example, the opening of a valve or the rotation speed of a pump.

[0043] The temperature T at which the water in the hot water tank 2 can be operated by the heat pump 23 o Once the temperature has been increased, the heat pump 23 and the pump 4 are stopped (step S15).

[0044] (Maintaining the temperature of hot water in the hot water tank) The steam boiler 1 is operated to supply heated steam to the hot water tank 2, and the water in the hot water tank 2 is heated to a set temperature. Then, the operation of the steam boiler 1 is continued to keep the hot water in the hot water tank 2 warm (step S16). In this step S16, unlike the above-mentioned step S2, the water in the hot water tank 2 is heated to a temperature T o (higher than the temperature of the water from the groundwater pump 22), and the temperature T o The temperature is simply raised from the preset temperature.

[0045] (Repeated saccharification, fermentation, and distillation processes) By this step S16, the exhaust heat generated in the heat exchangers 12, 18 and coolers 13, 19 of the pot stills 11, 17 is recovered by the exhaust heat tank 24 and the heat pump 23, and can be reused as part of the energy for heating the water in the hot water storage tank 2. After step S16 is performed, the process returns to step S3, and the processes of steps S3 to S16 described above are repeated.

[0046] (Reuse of steam from the steam boiler) When the steam boiler 1 is operated in the process S2 or the process S16, the condensed water (waste hot water) of the heated steam that has passed through the heat exchanger 3 and heated the heat medium (water) in the hot water storage tank 2 is recycled to the boiler condensate water recycling line L 2’ The hot water supply line L1 may be connected to the hot water tank 22 via the lines L1, L2, L3, and L4, and the hot water supply line L2 may be connected to the hot water tank 22 via the lines L1, L2, L3, and the hot water supply line L3 may be connected to the hot water tank 22 via the lines L2, L3, and the hot water supply line L2 may be connected to the hot water tank 22 via the lines L1, L2, L3, and the hot water supply line L2 may be connected to the hot water tank 24 via the lines L1, L2, L3, and the hot water supply line L3 ... [Industrial Applicability]

[0047] Conventional methods have relied on a steam boiler 1 as a heat source for distillation production, but the heat source system of the present invention uses a steam boiler 1 in conjunction with a heat pump 23 to recover and reuse the exhaust heat that would otherwise be wasted during distillation in pot stills 11 and 17, thereby saving energy and reducing running costs, enabling the production of distilled spirits that can also contribute to carbon-neutral efforts.

[0048] Therefore, the heat source system for producing distilled spirits and the exhaust heat recovery method using the same of the present invention have industrial applicability and high utility. [Explanation of symbols]

[0049] 1. Steam boiler 2 Hot water tank 3,7 Heat exchanger 4,6,9,15,25 pump 5 Saccharification tank 8 Fermentation tank 10,16 Preheating heat exchanger 11,17 First pot still, second pot still 12,18 Heat exchanger 13,19 Cooler 14,20 Storage tank 21 barrels 22 Groundwater pump 23 Heat Pump 24 Heat exhaust tank 26 Fun Cooler L1 Preheating heat medium circulation line L2 condensate reuse line L 2’ Boiler condensate reuse line L3 Cooling water reuse line L4 Circulation line for waste heat transfer L5 recovery waste heat return line T1 cooling side heat medium inlet temperature T o Temperature at which the heat pump can operate T u The maximum temperature that can be operated by the heat pump

Claims

1. a pot still equipped with a heat exchanger and a cooler; a steam boiler that generates heating steam and supplies a portion of the heating steam to the heat exchanger; a hot water storage tank for storing water for producing distilled liquor and for heating the water using a part of the heating steam; a heat exhaust tank for collecting the heated steam that has passed through the heat exchanger and turned into condensed water and the refrigerant that has passed through the cooler and turned into hot water, and recovering exhaust heat; a heat pump that receives the exhaust heat recovered in the exhaust heat tank; a recovered waste heat return line that sends the water stored in the hot water storage tank to the heat pump and returns the water heated by receiving the waste heat from the heat pump to the hot water storage tank; Equipped with A heat source system for producing distilled spirits.

2. a circulation line for exhaust heat transfer that circulates a heat medium for exhaust heat transfer between the heat pump and the exhaust heat tank is further provided; In the exhaust heat transfer circulation line, the inlet temperature T １ is the upper limit temperature T at which the heat pump can operate. ｕ The inlet temperature T １ The temperature of the exhaust heat transfer medium itself or the flow rate of the exhaust heat transfer medium is adjusted. The heat source system for producing distilled spirits according to claim 1.

3. A boiler condensate recycling line is connected between the steam boiler and the heat exhaust tank, and sends the heated steam used to heat the water in the hot water storage tank as condensate to the heat exhaust tank. The heat source system for producing distilled spirits according to claim 1 or 2.

4. a preheating heat exchanger provided upstream of the pot still and configured to heat the fermented liquid or distilled liquid supplied to the pot still; a preheating heat medium circulation line that sends hot water heated in the hot water storage tank to the preheating heat exchanger and returns the hot water that has received and exchanged heat in the preheating heat exchanger to the hot water storage tank; Further comprising: The heat source system for producing distilled spirits according to claim 1 or 2.

5. A step S1 of storing water for producing distilled liquor in a hot water storage tank; a step S2 of operating a steam boiler to generate heated steam and using the heated steam to heat the water in the hot water storage tank to a set temperature; Steps S7 and S7b include operating the steam boiler to generate heating steam and supplying the heating steam to a heat exchanger attached to the pot still, thereby heating the fermented liquid or distilled liquid in the pot still to a set temperature; Steps S8 and S8b of preparing a heat exhaust tank capable of heat exchange with a heat pump and sending condensed water of the heating steam that has passed through the heat exchanger to the heat exhaust tank through a condensed water reuse line; After the liquid temperature of the fermented liquid or the distilled liquid reaches a set temperature, steps S9 and S9b are performed to maintain the liquid temperature while adjusting the amount of heating steam to the heat exchanger; Steps S10 and S10b of supplying refrigerant to a cooler attached to the pot still and supplying water to the hot water tank; Steps S11 and S11b include sending the condensed water that has passed through the heat exchanger to the heat exhaust tank through a condensed water reuse line, and sending the refrigerant that has passed through the cooler and received heat to the heat exhaust tank through a cooling water reuse line; a step S12 of flowing the water in the hot water storage tank through a heat recovery exhaust heat return line so that the water passes through the heat pump and returns to the hot water storage tank; a step S13 of operating the heat pump when the waste hot water containing the condensed water and the refrigerant is stored in the heat exhaust tank up to a set amount, recovering waste heat from the waste hot water in the heat exhaust tank through a circulation line for transferring waste heat, and heating the water in the recovered waste heat return line and returning it to the hot water storage tank; The water in the hot water storage tank is at a temperature T at which the heat pump can operate. ｏ a step S15 of temporarily stopping the heat pump when the temperature is increased to the temperature; a step S16 of operating the steam boiler to supply the heated steam to the hot water storage tank, and heating the water in the hot water storage tank to a set temperature and keeping it warm; and After step S16 is performed, the process returns to steps S7 and S7b, and the processes of steps S7, S7b to S16 are repeated. A method for recovering and supplying exhaust heat using a heat source system for producing distilled spirits.

6. After the step S13 is performed, the inlet temperature T １ is the upper limit temperature T at which the heat pump can operate. ｕ The inlet temperature T １ Further comprising a step S14 of adjusting the temperature of the cooling side heat medium itself or the flow rate of the cooling side heat medium, 6. The exhaust heat recovery and supply method according to claim 5.

7. The steam boiler and the waste heat tank are connected in advance by a boiler condensate recycle line, and The method further includes a step of sending the heated steam used to heat the water in the hot water storage tank as condensed water to the exhaust heat tank when the steam boiler is operated in the step S2 or the step S16.

7. The exhaust heat recovery and supply method according to claim 5 or 6.

8. a preheating heat exchanger for preheating the fermentation liquid or the distillation liquid supplied to the pot still is further provided; The method further includes steps S6 and S6b of preheating the fermented liquid or the distilled liquid by supplying the water heated in the hot water storage tank to the preheating heat exchanger before carrying out step S7, and After step S16 is performed, the process returns to steps S6 and S6b, and the processes of steps S6, S6b to S16 are repeated.

7. The exhaust heat recovery and supply method according to claim 5 or 6.

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