Reactor temperature control system for preparing natural perfume

Abstract

A reactor temperature control system for preparing natural perfume comprises a distillation still, a heating pipe is arranged in the bottom of the distillation still, and the top of the distillation still is connected with a steam output pipe and a water injection pipe; the water injection pipe is connected with a slow water pipe, the lower end of the slow water pipe is connected with a water inlet pipe, a heat exchange pipe is arranged outside the slow water pipe, the lower part of the heat exchange pipe is provided with a steam inlet and connected with a first return pipe, and the upper part of the heat exchange pipe is connected with a steam outlet; the top of the heat exchange pipe is connected with a liquefying tank, a second heat exchange pipe is arranged outside the liquefying tank, the bottom of the liquefying tank is connected with a second backflow pipe, the second heat exchange pipe is connected with a vortex pipe, and a cold end outlet of the vortex pipe is connected to the second heat exchange pipe. According to the reactor temperature control system, dynamic adjustment of steam pressure and temperature is achieved through the PID control valve; inlet water is preheated by utilizing hot air and steam tail gas of the vortex tube in sequence, and the temperature of the inlet water is increased to reduce the influence on the distillation kettle.

Description

Technical Field

[0001] The invention relates to the field of temperature control for preparing spices, and in particular to a reactor temperature control system for preparing natural spices. Background Art

[0002] Natural flavors are aromatic substances extracted directly from plants, animals, or microorganisms in nature, without chemical synthesis. They typically contain complex chemical compositions and possess unique aroma characteristics, making them widely used in the food, cosmetics, pharmaceutical, and fragrance industries. Natural flavors are characterized by their natural origin and complex composition, but they also come with limited production and high costs.

[0003] Distillation is the most traditional and widely used method for extracting essential oils from plants. It is particularly suitable for natural fragrance ingredients that are rich in volatile components and heat-resistant. The core principle of distillation is to disrupt the plant cell structure with water or steam, releasing volatile aromatic molecules, and then separating the essential oils through condensation. Steam distillation is one of the most common methods. Steam is generated by an external boiler and passed into a still to penetrate the raw material. The steam gently heats the raw material, rupturing the cells and releasing the essential oils. The essential oils rise with the steam and enter the condenser, where they are converted into liquid form. The oil-water mixture is separated into layers through a separator, and the essential oils are collected.

[0004] In the steam distillation process, steam pressure and temperature are core parameters that directly affect the extraction efficiency, ingredient integrity and final quality of essential oils. The aromatic molecules in many natural spices are sensitive to high temperatures. Excessively high temperatures can lead to oxidation, decomposition or isomerization, resulting in aroma distortion and even odor. The appropriate combination of pressure and temperature can accelerate the rupture of plant cells, promote the release of essential oils, shorten distillation time and reduce energy consumption.

[0005] Steam pressure and temperature are positively correlated; higher saturated steam pressure corresponds to higher temperature. Adjusting the opening of the boiler's steam valve controls the steam pressure entering the still. However, current temperature control devices cannot continuously replenish water during steam generation. This would cause significant temperature fluctuations in the still's water, affecting the steam output temperature. Summary of the Invention

[0006] The purpose of the present invention is to provide a reactor temperature control system for preparing natural flavors to solve the above technical problems.

[0007] A reactor temperature control system for preparing natural spices comprises a still, wherein a heating pipe is built into the bottom of the still, and a steam output pipe and a water injection pipe are connected to the top of the still; a PID control valve is provided on the steam output pipe, the water injection pipe is connected to a slow water pipe, the lower end of the slow water pipe is connected to a water inlet pipe, a heat exchange pipe is provided outside the slow water pipe, a steam inlet is provided at the lower portion of the heat exchange pipe and is connected to a first reflux pipe, and a steam outlet is connected to the upper portion of the heat exchange pipe; the top of the heat exchange pipe is connected to a liquefaction tank, a second heat exchange pipe is provided outside the liquefaction tank, the bottom of the liquefaction tank is connected to the second reflux pipe, the second heat exchange pipe is connected to a vortex tube, and the cold end outlet of the vortex tube is connected to the second heat exchange tube.

[0008] Preferably, the system further includes a water reservoir comprising two compartments connected at the bottom, namely an aeration tank and a water intake tank. A first return pipe and a second return pipe are connected to the water intake tank. A pump is provided on the water reservoir, and the water intake pipe is connected to the pump. The aeration tank is connected to an external water source, and an aeration pipe is provided at the bottom of the aeration tank. The hot end outlet of the vortex tube is connected to the aeration pipe. The hot air flow from the vortex tube forms a large number of bubbles after entering the aeration pipe. This not only exchanges heat with the water, initially preheating the incoming water, but also carries impurities in the water to the surface of the aeration tank, isolating the impurities from the water intake tank.

[0009] Preferably, an overflow weir is provided at the top of the aeration tank, and an impurity pool is provided adjacent to the overflow weir. The amount of water continuously replenished to the aeration tank is greater than the amount of water drawn from the water intake pool by the pump. The excess water continuously flows from the overflow weir into the impurity pool, carrying surface impurities to the impurity pool, thereby achieving automatic and continuous impurity removal.

[0010] Preferably, a stirring shaft is provided within the still, with a stirrer connected to the shaft. The stirring shaft extends to the outside of the bottom of the still and rotates in a controlled manner. The stirring shaft rotates slowly, and the force exerted by the stirrer on the water accelerates the circulation of water between the bottom and surface layers.

[0011] Preferably, an outer shaft is coaxially sleeved outside the stirring shaft, and a scraper is connected to the outer shaft. The scraper is in contact with the inner wall of the still. The outer shaft extends to the outside of the bottom of the still, and the exposed end is connected to a gear. The bottom of the still is also provided with a rotating shaft, which is provided with a missing gear. The missing gear meshes with the gear. The rotating shaft and the stirring shaft are also provided with pulleys and connected by a belt. When the stirring shaft rotates in a controlled manner, the scraper rotates in conjunction with the outer shaft to scrape off scale adhering to the inner wall of the still.

[0012] Preferably, the shaft is provided with an axially extending slot, the top of which is connected to a retaining slot, and the missing gear is slidably mounted on the slot. When descaling is not required, the missing gear is displaced from the gear, disconnecting the meshing transmission path. When descaling is required, the missing gear is positioned in the retaining slot, closing the meshing transmission path. The arrangement of the missing gear ensures the required space for the missing gear to operate on the shaft.

[0013] Preferably, a hollow groove is provided at the upper end of the stirring shaft, a sliding shaft is provided in the hollow groove, a float is connected to the sliding shaft, and a liquid level rod is coaxially provided at the upper end of the stirring shaft. The bottom of the liquid level rod is connected to the sliding shaft, and the top is connected to a transmitter. A receiver is provided at the top of the still. This is to maintain the liquid level in the still within a small fluctuation range, thereby avoiding a sudden drop in the water temperature in the still due to the addition of a large amount of water in a short period of time.

[0014] Beneficial effects: Compared with the prior art, the reactor temperature control system of the present invention realizes dynamic regulation of steam pressure and temperature through a PID control valve; the hot air from the vortex tube and the steam exhaust gas are used to preheat the inlet water in turn, thereby increasing the inlet water temperature to reduce the impact on the distillation kettle; at the same time, the steam exhaust gas recovers heat through heat exchange with the inlet water and the cold air flow of the vortex tube to form liquid water and be recycled to the water reservoir, thereby improving resource utilization; the water reservoir is arranged at intervals, and impurities are removed while being preheated by the hot air flow of the vortex tube, and the impurities are carried out of the water reservoir by overflow; the circulation of the upper and lower water bodies in the distillation kettle is realized by stirring, thereby avoiding the formation of local hot and cold zones; at the same time, the scraper can be linked to scrape off the scale on the inner wall of the distillation kettle, and the linkage path can be selectively connected or disconnected. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which: Figure 1 : A schematic structural diagram of a reactor temperature control system of the present invention; Figure 2 : Schematic diagram of the internal structure of the reactor temperature control system; Figure 3 : Schematic diagram of the bottom structure of the distillation kettle; Figure 4 : Schematic diagram of the connection of the liquid height rod at the top of the stirring shaft; In the figure: distillation kettle 1, heating pipe 2, steam output pipe 3, water injection pipe 4, PID control valve 5, slow water pipe 6, water inlet pipe 7, heat exchange pipe 8, steam inlet 9, first reflux pipe 10, steam outlet 11, liquefaction tank 12, second heat exchange pipe 13, vortex tube 14, water reservoir 15, aeration tank 151, water intake tank 152, impurity tank 153, aeration pipe 16, stirring shaft 17, hollow tank 171, stirring plate 18, outer shaft 19, scraper 20, gear 21, rotating shaft 22, slide 221, card slot 222, missing gear 23, slide shaft 24, float 25, liquid height rod 26, transmitter 27, receiver 28. DETAILED DESCRIPTION

[0016] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the following Figures 1-4The present invention will now be described in detail. Several embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0017] Reference Attachment Figure 1 A temperature control system for a reactor used to prepare natural fragrances includes a still 1 with a built-in heating tube 2 at the bottom. A steam output tube 3 and a water injection tube 4 are connected to the top of the still 1. A PID control valve 5 is provided on the steam output tube 3. Water is added to the still 1 through the water injection tube 4. The heating tube 2 is energized to generate heat, causing the water in the still to generate steam. The steam is then output through the steam output tube 3, which is then connected to a fragrance reactor. After entering the fragrance reactor, the steam penetrates the raw materials, gently heating them and rupturing their cells to release essential oils.

[0018] The PID control valve used in this embodiment is an efficient and precise automated control method that can achieve dynamic adjustment of steam pressure and temperature. By adjusting the deviation between the real-time feedback signal (pressure, temperature) and the set value, the output signal is adjusted according to the three dimensions of proportion (P), integration (I), and differentiation (D), driving the opening of the steam valve, and ultimately achieving precise control, thereby optimizing the efficiency and quality of essential oil extraction.

[0019] After use, the temperature of the steam decreases. On the one hand, this embodiment is to realize the recovery of the internal energy of the steam. On the other hand, it should be noted that the kettle involved in the natural flavor extraction process is large in size and the amount of steam required is also huge. The distillation kettle 1 needs to be continuously replenished with water. As described in the background technology, the replenished water causes the temperature of the water in the distillation kettle to fluctuate. This embodiment uses reflux steam to preheat the entity added to the distillation kettle, transfers the heat energy of the reflux steam to the water, and heats the water.

[0020] Reference Attachment Figure 1 and Figure 2 Specifically, the water injection pipe 4 is connected to a slow water pipe 6, the lower end of which is connected to a water inlet pipe 7. A heat exchange pipe 8 is provided outside the slow water pipe 6. The lower portion of the heat exchange pipe 8 is provided with a steam inlet 9 and is connected to a first reflux pipe 10, and the upper portion is connected to a steam outlet 11. The water to be injected into the still 1 is first injected into the slow water pipe 6 through the water inlet pipe 7. The water slowly flows upward in the slow water pipe 6, and the reflux steam enters the heat exchange pipe 8 through the steam inlet 9. In the heat exchange pipe 8, the steam exchanges heat with the water in the slow water pipe 6 to recover the internal energy of the steam. At the same time, the steam cools down to form liquid water, which flows downstream and converges at the bottom end of the heat exchange pipe 8 and flows out from the first reflux pipe 10.

[0021] The top of the heat exchange tube 8 is connected to the liquefaction tank 12. A second heat exchange tube 13 is provided outside the liquefaction tank 12. The bottom of the liquefaction tank 12 is connected to a second return pipe. The second heat exchange pipe 13 is connected to a vortex tube 14. The vortex tube is a device that uses compressed gas to produce a hot and cold separation effect. The compressed gas enters through a nozzle, the speed is greatly increased, and it enters the vortex chamber in a tangential direction, forming a high-speed rotating vortex. The outer layer of gas is diffused outward by centrifugal force, and the kinetic energy is converted into thermal energy, the temperature rises, and a hot air flow is formed. The inner layer of gas flows back to the central low-pressure area, the kinetic energy is reduced, and the temperature is significantly reduced, forming a cold air flow. The cold end outlet of the vortex tube 14 is connected to the second heat exchange tube 13 through a pipeline. After the cold air flow is discharged from the cold end outlet, it enters the second heat exchange tube 13, and heat is exchanged with the reflux steam in the liquefaction tank 12 in the second heat exchange tube 13, so that the reflux steam is quickly cooled and liquefied to form a large amount of liquefied water, which then flows out from the second return pipe at the bottom.

[0022] In the present invention, the reflux steam completes heat exchange in the heat exchange tube 8 and the water injection in the slow water tube 6, and in the second heat exchange tube 13 with the cold air flow from the vortex tube, which can almost achieve complete recovery of the reflux steam.

[0023] The present invention also includes a water reservoir 15, which includes two compartments connected at the bottom, namely an aeration tank 151 and a water intake tank 152. The clean condensed water formed after the secondary heat exchange of the reflux steam is returned to the water intake tank 152 through the first reflux pipe 10 and the second reflux pipe respectively. A pump is provided on the water reservoir 15, and the water inlet pipe 7 is connected to the pump. The pump draws water from the water intake tank 152; the aeration tank 151 is connected to an external water source, and an aeration pipe 16 is provided at the bottom of the aeration tank 151, and the hot end outlet of the vortex tube 14 is connected to the aeration pipe 16.

[0024] The hot air flow from the vortex tube 14 is discharged from the hot end outlet and enters the aeration pipe 16, forming a large number of bubbles. During the rising process in the aeration tank 151, the bubbles exchange heat with the water body, thereby achieving the initial preheating of the incoming water. While recovering the energy of the hot air flow, it can also carry impurities in the water body to the surface of the liquid in the aeration tank 151, and the impurities will be isolated from the water intake tank 152.

[0025] An overflow weir is provided on the top of the aeration tank 151, and an impurity tank 153 is provided next to the overflow weir. The amount of water continuously replenished to the aeration tank 151 is greater than the amount of water drawn by the pump from the water intake tank 152, so that the excess water will continuously flow from the overflow weir to the impurity tank 153, and bring the surface impurities to the impurity tank 153, thereby achieving the purpose of automatically and continuously removing impurities.

[0026] As mentioned above, the still 1 is large in size. During the process of generating steam, the water may not be able to cover the entire area by relying on natural convection, resulting in overheating at the bottom and low temperatures at the top. In addition, the continuously replenished water is directly added to the surface, which increases the temperature difference between the bottom and surface water. This embodiment uses low-speed stirring to promote water circulation within the still 1 and reduce local "hot spots" or "cold zones." Specifically, the still 1 is provided with a stirring shaft 17, to which a stirrer 18 is connected. The stirring shaft 17 extends to the outside of the bottom of the still 1. The exposed end of the stirring shaft 17 rotates slowly under the drive of an external drive device. The force exerted by the stirrer 18 on the water accelerates the circulation of water at the bottom and surface.

[0027] Reference Attachment Figure 2 and Figure 3 After a period of operation, a layer of scale forms on the inner wall of the still 1. In this embodiment, a rotating agitator shaft 17 is used to remove the scale from the inner wall. Specifically, an outer shaft 19 is coaxially sleeved outside the agitator shaft 17. A scraper 20 is connected to the outer shaft 19. The scraper 20 adheres to the inner wall of the still 1. The outer shaft 19 also extends to the outside of the bottom of the still 1, and the exposed end is connected to a gear 21. A rotating shaft 22 is also rotatably mounted on the bottom of the still 1. The rotating shaft 22 is equipped with a gear 23 that meshes with the gear 21. Pulleys are also provided on the rotating shaft 22 and the agitator shaft 17, and are connected by a belt. When the agitator shaft 17 is controlled to rotate, the belt drives the rotating shaft 22, which in turn rotates the outer shaft 19 through the meshing of the gear 23 with the gear 21, thereby rotating the scraper 20 to scrape off the scale adhering to the inner wall of the still 1.

[0028] According to common sense, it takes a certain amount of time for scale to form, so the removal of scale is intermittent. In this embodiment, a slide groove 221 is provided on the rotating shaft 22 in the axial direction, and a card groove 222 is connected to the top of the slide groove 221. The missing gear 23 is slidably set on the slide groove 221 and can slide on the slide groove 221.

[0029] When scale removal is not required, the missing gear 23 is at the bottom of the chute 221, misaligned with the gear 21, and the meshing transmission path is disconnected. When scale removal is required, the missing gear 23 is slid upward along the chute 221 to the upper end of the chute 221, and then rotated to position the missing gear 23 in the retaining groove 222. At this point, the missing gear 23 is at the same height as the gear 21, closing the meshing transmission path. It should be noted that in this embodiment, the arrangement of the missing gear 23 ensures that the missing gear 23 has the space required for axial sliding (along the chute 221) and axial rotation (entering the retaining groove 222) on the rotating shaft 22, thereby avoiding the gear 21. At this time, the missing gear 23 and the gear 21 are in intermittent meshing transmission, and the scraper 20 will gradually remove the scale attached to the inner wall of the distillation kettle 1.

[0030] refer to Figure 4 The upper portion of the stirring shaft 17 is provided with a hollow groove 171. A sliding shaft 24 is provided within the hollow groove 171. A float 25 is connected to the slide shaft 24. A liquid level rod 26 is coaxially provided at the upper end of the stirring shaft 17. The bottom of the liquid level rod 26 is connected to the sliding shaft 24, and the top is connected to a transmitter 27. A receiver 28 is provided at the top of the still 1. As the still 1 continues to output steam, the water in the still 1 is gradually consumed and the liquid level drops. The float 25 drops with the liquid level, and the transmitter 27 drops synchronously. When the transmitter 27 is aligned with the receiver 28, the receiver 28 sends a water replenishment signal to inject water into the still 1, maintaining the liquid level in the still 1 within a small range of fluctuations. This avoids the situation where a large amount of water is added in a short period of time, causing the water temperature in the still 1 to drop suddenly.

[0031] The reactor temperature control system of the present invention realizes dynamic regulation of steam pressure and temperature through a PID control valve; the hot air of the vortex tube and the steam tail gas are used to preheat the inlet water in sequence, thereby increasing the inlet water temperature and reducing the impact on the distillation kettle; at the same time, the steam tail gas recovers heat through heat exchange with the inlet water and the cold air flow of the vortex tube, forming liquid water and recycling it to the water reservoir, thereby improving resource utilization; the water reservoir is arranged at intervals, and impurities are removed while being preheated by the hot air flow of the vortex tube, and the impurities are carried out of the water reservoir by overflow; the circulation of the upper and lower water bodies in the distillation kettle is realized by stirring, thereby avoiding the formation of local hot and cold zones; at the same time, a scraper can be linked to scrape off scale on the inner wall of the distillation kettle, and the linkage path can be selectively connected or disconnected.

[0032] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A reactor temperature control system for preparing natural spices, comprising a still (1), a heating tube (2) built into the bottom of the still (1), and a steam output tube (3) and a water injection tube (4) connected to the top of the still (1); characterized in that: A PID control valve (5) is provided on the steam output pipe (3); the water injection pipe (4) is connected to a slow water pipe (6); the lower end of the slow water pipe (6) is connected to a water inlet pipe (7); a heat exchange pipe (8) is provided outside the slow water pipe (6); a steam inlet (9) is provided at the lower portion of the heat exchange pipe (8) and is connected to a first return pipe (10); and a steam outlet (11) is connected at the upper portion; the top of the heat exchange pipe (8) is connected to a liquefaction tank (12); a second heat exchange pipe (13) is provided outside the liquefaction tank (12); the bottom of the liquefaction tank (12) is connected to the second return pipe; the second heat exchange pipe (13) is connected to a vortex pipe (14); and the cold end outlet of the vortex pipe (14) is connected to the second heat exchange pipe (13).

2. The reactor temperature control system according to claim 1, characterized in that: The invention also includes a water reservoir (15), which includes two compartments connected at the bottom, namely an aeration tank (151) and a water intake tank (152). The first return pipe (10) and the second return pipe are connected to the water intake tank (152). A pump is provided on the water reservoir (15), and the water inlet pipe (7) is connected to the pump. The aeration tank (151) is connected to an external water source. An aeration pipe (16) is provided at the bottom of the aeration tank (151), and the hot end outlet of the vortex tube (14) is connected to the aeration pipe (16).

3. The reactor temperature control system according to claim 2, characterized in that: An overflow weir is provided on the top of the aeration tank (151), and an impurity tank (153) is provided next to the overflow weir. The amount of water continuously replenished to the aeration tank (151) is greater than the amount of water drawn from the water intake tank (152) by the pump.

4. The reactor temperature control system according to claim 1, characterized in that: The still (1) is provided with a stirring shaft (17), the stirring shaft (17) is connected to a stirring plate (18), the stirring shaft (17) extends to the outside of the bottom of the still (1), and the stirring shaft (17) rotates in a controlled manner.

5. The reactor temperature control system according to claim 4, characterized in that: The stirring shaft (17) is coaxially sleeved with an outer shaft (19), the outer shaft (19) is connected to a scraper (20), the scraper (20) is attached to the inner wall of the distillation kettle (1), the outer shaft (19) extends to the outside of the bottom of the distillation kettle (1), and the exposed end is connected to a gear (21); the bottom of the distillation kettle (1) is also rotatably provided with a rotating shaft (22), the rotating shaft (22) is provided with a missing gear (23), the missing gear (23) is meshed with the gear (21), and the rotating shaft (22) and the stirring shaft (17) are also provided with pulleys and are connected by a belt.

6. The reactor temperature control system according to claim 5, characterized in that: A sliding groove (221) is provided on the rotating shaft (22) in the axial direction, a clamping groove (222) is connected to the top of the sliding groove (221), and the missing gear (23) is slidably arranged on the sliding groove (221).

7. The reactor temperature control system according to claim 5, characterized in that: A hollow groove (171) is provided at an upper portion of the stirring shaft (17), a sliding shaft (24) is provided in the hollow groove (171), a floating body (25) is connected to the sliding shaft (24), a liquid height rod (26) is coaxially provided at the upper end of the stirring shaft (17), the bottom of the liquid height rod (26) is connected to the sliding shaft (24), and the top is connected to a transmitter (27), and a receiver (28) is provided at the top of the distillation kettle (1).

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