A flash evaporation system for inactivating enzymes in plant milk-based materials

Abstract

The present invention relates to the technical field of enzyme inactivation and passivation, and specifically to an enzyme inactivation flash evaporation system for a plant milk base. An enzyme inactivation flash evaporation system for a plant milk base comprises: a flash evaporation tank comprising an inner tank and an outer tank nested with each other, an interlayer space formed between the inner tank and the outer tank, the inner tank having a second feed port and a second discharge port, and the top being connected to the interlayer space, the second feed port being connected to a steam injection device; a vacuum pump connected to the flash evaporation tank, the vacuum pump being suitable for adjusting the inside of the flash evaporation tank to a predetermined vacuum degree; a condenser being provided in the interlayer space of the flash evaporation tank, being suitable for condensing the steam in the flash evaporation tank. The present invention provides an enzyme inactivation flash evaporation system for a plant milk base that can improve the quality of a plant milk base.

Description

Technical Field

[0001] The present invention relates to the technical field of enzyme inactivation and passivation, and in particular to an enzyme inactivation flash evaporation system for a plant milk base. Background Art

[0002] In the existing plant milk production process, since there are trypsin inhibitors in the plant milk base that affect the human body's absorption of protein, the trypsin inhibitors in the plant milk base need to be passivated. First, the plant milk base is steam-treated, but the unstable and volatile substances originally present in the plant milk base will produce an odor after steam treatment. Then, the unstable and volatile substances need to be separated from the plant milk base. However, since the condenser of the existing vacuum flash evaporation device is usually arranged at the top or outside of the flash tank, the unstable and volatile substances generated after steam treatment may return to the plant milk base after encountering the top condenser, or remain at the top of the flash tank and cannot be separated from the plant milk base in time, resulting in the plant milk base being accompanied by an unpleasant odor, affecting the quality of the obtained plant milk base. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect of low product quality of the enzyme inactivation flash evaporation system for plant milk base in the prior art, thereby providing an enzyme inactivation flash evaporation system for plant milk base that can improve the quality of plant milk base.

[0004] In order to solve the above technical problems, the present invention provides an enzyme inactivation flash evaporation system for a plant milk base, comprising:

[0005] A flash tank comprising an inner tank and an outer tank nested within each other, with an interlayer space formed between the inner tank and the outer tank, the inner tank having a second feed inlet and a second discharge inlet, and a top portion communicating with the interlayer space, the second feed inlet being connected to a steam injection device;

[0006] a vacuum pump, connected to the flash tank, adapted to adjust the flash tank to a predetermined vacuum level;

[0007] The condenser is arranged in the interlayer space of the flash tank and is suitable for condensing the steam in the flash tank.

[0008] Optionally, the condenser is a spiral coil arranged around the outer wall of the inner tank.

[0009] Optionally, the second feed port and the second discharge port are both provided at the bottom of the inner tank, and the angle between the axis of the second feed port and the axis of the inner tank is less than 90 degrees.

[0010] Optionally, the second discharge port is externally connected to an outlet pipeline, the outlet pipeline is provided with a discharge pump and a regulating valve, and the outlet pipeline is suitable for transporting the processed base material to the next process.

[0011] Optionally, a first pressure sensor is externally connected to the top of the flash tank, the first pressure sensor is connected to a second pressure sensor provided on the outlet pipeline, and the first pressure sensor, the second pressure sensor and the regulating valve are all connected to the controller signal.

[0012] Optionally, the vacuum pump is connected to the interlayer space through an exhaust pipe, the outlet pipe is connected to the exhaust pipe through a three-way valve, the outlet pipe is connected to the cleaning ball on the top of the flash tank through a reflux pipe, and a control valve is provided on the reflux pipe.

[0013] Optionally, the steam injection device comprises:

[0014] Bushing assembly;

[0015] a first sleeve coaxially sleeved on the periphery of the shaft sleeve assembly, with a first annular gap defined between an inner wall of the first sleeve and an outer wall of the shaft sleeve assembly, and a first feed port defined on the first sleeve, the first feed port being in communication with the first annular gap;

[0016] The second sleeve is coaxially sleeved on the periphery of the first sleeve, and a second annular gap is provided between the inner wall of the second sleeve and the outer wall of the first sleeve. A steam inlet is provided on the second sleeve, and the steam inlet is connected to the second annular gap. A converging space is also provided at the end of the second sleeve, and the second annular gap and the first annular gap are both connected to the converging space.

[0017] Optionally, the second sleeve is arranged near the end of the sleeve assembly and is provided with a first discharge port, the confluence space is arranged on the periphery of the end of the sleeve assembly, one end of the first discharge port is connected to the confluence space, and the other end is connected to the second feed port through a material pipeline.

[0018] Optionally, the first sleeve and the shaft sleeve assembly are connected at one end away from the first discharge port by a fastening assembly, the fastening assembly includes a bolt and a gasket, the first sleeve includes a main body and an end cover that are axially disassembled and connected, a boss is provided at the connection between the shaft sleeve assembly and the main body and the end cover, the gasket is provided at the boss, the gasket is suitable for adjusting the relative position of the first sleeve and the shaft sleeve assembly in the axial direction to adjust the size of the first annular gap, and the bolt passes through the end cover, gasket and main body in sequence.

[0019] Optionally, the second sleeve is provided with a gap between one end away from the first discharge port and the first sleeve, and an adjustment ring is provided at the gap, which is suitable for adjusting the relative position of the first sleeve and the second sleeve in the axial direction to adjust the size of the second annular gap.

[0020] The technical solution of the present invention has the following advantages:

[0021] 1. The enzyme-inactivating flash evaporation system for a plant milk-based material provided by the present invention comprises a flash tank, a vacuum pump, and a condenser. The flash tank comprises an inner tank and an outer tank nested within each other, with an interlayer space formed between the inner tank and the outer tank. The inner tank has a second feed inlet and a second discharge inlet, and the top is connected to the interlayer space. The second feed inlet is connected to a steam injection device. The vacuum pump is connected to the flash tank and is suitable for adjusting the vacuum level in the flash tank to a predetermined level. The condenser is provided in the interlayer space of the flash tank and is suitable for condensing the steam in the flash tank. By connecting the steam injection device to the second feed port, the plant milk base after steam treatment is directly introduced into the flash tank, thereby avoiding the temperature of the plant milk base from decreasing during transportation, and the flash tank can quickly evaporate the unstable and volatile substances in the plant milk base, and the evaporated steam flows through the top of the flash tank to the condenser in the interlayer space. The liquid condensed by the condenser falls into the interlayer space and is discharged through the interlayer space, thereby avoiding the condensate from returning to the plant milk base again or staying at the top of the flash tank and unable to be discharged in time, thereby improving the quality of the obtained plant milk base.

[0022] 2. In the enzyme-inactivating flash evaporation system for plant milk-based materials provided by the present invention, the condenser is a spiral coil arranged on the outer wall of the inner tank. By adopting a spiral coil-shaped condenser, the contact area between the condenser and the steam in the flash tank can be increased, thereby improving the efficiency of steam condensation.

[0023] 3. In the enzyme-inactivating flash evaporation system for a plant milk base provided by the present invention, the second feed port and the second discharge port are both located at the bottom of the inner tank, and the angle between the axis of the second feed port and the axis of the inner tank is less than 90 degrees. By arranging the second feed port at an angle to the inner tank, the plant milk base can enter the inner tank along the tube wall of the second feed port when entering the inner tank, and the plant milk base is separated from unstable and volatile substances by the action of centrifugal force, thereby improving the efficiency of vacuum flash evaporation.

[0024] 4. The enzyme-inactivating flash evaporation system for a plant milk base provided by the present invention comprises a first pressure sensor externally connected to the top of the flash tank, the first pressure sensor being connected to a second pressure sensor provided on the outlet pipeline, the first pressure sensor, the second pressure sensor and the regulating valve being all connected to a controller signal, and the pressure difference between the first pressure sensor and the second pressure sensor being monitored by the controller. When the pressure difference is too large, the liquid flow rate is controlled by the regulating valve to avoid excess liquid in the flash tank, which overflows from the space at the top of the flash tank into the interlayer space and then flows out, causing waste.

[0025] 5. The enzyme-inactivating flash evaporation system of the plant milk base provided by the present invention comprises a sleeve assembly, a first sleeve and a second sleeve coaxially sleeved from the inside to the outside; the first sleeve is coaxially sleeved on the periphery of the sleeve assembly, and a first annular gap is provided between the inner wall of the first sleeve and the outer wall of the sleeve assembly, a first feed port is provided on the first sleeve, and the first feed port is communicated with the first annular gap; the second sleeve is coaxially sleeved on the periphery of the first sleeve, and a second annular gap is provided between the inner wall of the second sleeve and the outer wall of the first sleeve, a steam inlet is provided on the second sleeve, and the steam inlet is communicated with the second annular gap, and a confluence space is further provided at the end of the second sleeve, and the second annular gap and the first annular gap are both communicated with the confluence space, and the material to be processed passes through the first feed port. After entering the first annular gap, the steam flows into the confluence space from the steam inlet. After entering the second annular gap from the steam inlet, the steam flows into the confluence space, thereby achieving contact between the material and the steam in the confluence space in the same direction at the same time, thereby achieving heating treatment of the material. Since the material and the steam contact in the same direction, the material is prevented from backflowing, the passivation effect of the trypsin inhibitor in the material is improved, thereby improving the human body's absorption of protein. At the same time, the unstable and volatile substances in the plant milk base can be activated, and the unstable and volatile substances in the plant milk base (i.e., volatile aldehyde and ketone oxides) can be quickly evaporated by flash evaporation. That is, the trypsin inhibitor is inactivated by steam passivation and the unstable and volatile substances are activated, so that the unstable and volatile substances are quickly separated from the plant milk base by flash evaporation, thereby improving the flash evaporation effect. In addition, because the steam injection device preheats the plant milk base, when it enters the flash tank, the vacuum degree in the flash tank can be relatively reduced to meet the flash evaporation requirements, thereby reducing the quality requirements of the flash tank and improving the safety performance to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a flow chart of the enzyme inactivation flash evaporation system for the plant milk base provided by the present invention;

[0028] Figure 2 Schematic diagram of the steam injection device provided by the present invention Figure 1 ;

[0029] Figure 3 Schematic diagram of the steam injection device provided by the present invention Figure 2 ;

[0030] Figure 4 This is a schematic diagram of the interior of the flash tank provided by the present invention.

[0031] Description of reference numerals:

[0032] 1. Vacuum pump; 2. Vacuum controller; 3. Vacuum gauge; 4. Air control valve; 5. Cooling water outlet; 6. Cooling water inlet; 7. Three-way valve; 8. Second pressure sensor; 9. First pressure sensor; 10. Discharge pump; 11. Pressure gauge; 12. Regulating valve; 13. Second discharge port; 14. Control valve; 15. Flash tank; 16. Safety valve; 17. Condenser; 18. Second feed port; 19. Exhaust line; 20. Air line; 21. Outlet line; 22. Cleaning ball; 23. Return line; 24. , steam injection device; 25, first sleeve; 26, first annular gap; 27, first feed port; 28, second sleeve; 29, second annular gap; 30, steam inlet; 31, confluence space; 32, first discharge port; 33, material pipeline; 34, bolt; 35, gasket; 36, body; 37, end cover; 38, boss; 39, adjustment ring; 40, rotating shaft; 41, control sleeve; 42, first part; 43, second part; 44, third part; 45, feed pipeline; 46, air intake pipeline. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] like Figure 1 - Figure 3 A specific embodiment of the enzyme inactivation flash evaporation system for plant milk base shown includes a flash evaporation tank 15 , a vacuum pump 1 , a condenser 17 , a safety valve 16 and a steam injection device 24 .

[0036] The steam injection device 24 includes a shaft sleeve assembly, a first sleeve 25 and a second sleeve 28 which are coaxially sleeved in sequence from the inside to the outside.

[0037] The shaft sleeve assembly includes a rotating shaft 40 and a control sleeve 41 which are sleeved on each other. The control sleeve 41 is sleeved on the rotating shaft 40 .

[0038] The first sleeve 25 is coaxially sleeved on the periphery of the control sleeve 41, and a first annular gap 26 is formed between the inner wall of the first sleeve 25 and the outer wall of the control sleeve 41. The first annular gap 26 is connected to the first feed port 27 on the first sleeve 25. The plant milk base to be processed enters the first annular gap 26 through the first feed port 27. The first feed port 27 is arranged at the end of the feed pipeline 45. A one-way valve is provided on the feed pipeline 45 near the first feed port 27. The one-way valve is provided to prevent the plant milk base to be processed from flowing back into the feed pipeline 45. At the same time, a temperature sensor and a pressure sensor are also provided on the feed pipeline 45, which can display the temperature of the plant milk base to be processed and the pressure of the feed pipeline 45 in real time, so that the staff can adjust the steam flow according to the temperature and pressure.

[0039] The second sleeve 28 is coaxially sleeved on the periphery of the first sleeve 25, and a second annular gap 29 is provided between the inner wall of the second sleeve 28 and the outer wall of the first sleeve 25. The second sleeve 28 is provided with a steam inlet 30 connected to the second annular gap 29. Steam flows into the second annular gap 29 through the steam inlet 30. The steam inlet 30 and the first feed port 27 are staggered, that is, the steam inlet 30 is set away from the end of the feed pipeline 45; the second sleeve 28 is located near the end position of the rotating shaft 40, and the end of the second sleeve 28 is further provided with a converging space 31. The converging space 31 is provided on the periphery of the end of the rotating shaft 40. The end of the rotating shaft 40 is tapered. The end portion extends to partially cover the tapered side wall of the rotating shaft 40, and the end portion of the second sleeve 28 extends to completely cover the tapered end of the rotating shaft 40. The confluence space 31 is connected to the second annular gap 29 and the first annular gap 26, so that the plant milk base to be processed in the first annular gap 26 and the steam in the second annular gap 29 both flow into the confluence space 31 along the tapered side wall, and are thereby mixed in the confluence space 31. Since the plant milk base to be processed and the steam both flow in the tapered direction and have the same flow direction, backflow of the material is avoided, the passivation effect on the trypsin inhibitor in the material is improved, and the steam and the plant milk base to be processed are uniformly mixed at the tapered end.

[0040] The second sleeve 28 is also provided with a first discharge port 32 that communicates with the confluence space 31. The plant milk base mixed with steam is discharged through the first discharge port 32. The first discharge port 32 is connected to the second feed port 18 via a material line 33, thereby directing the steam-treated plant milk base into the flash tank 15. The material line 33 is a curved, insulated line that allows for more uniform mixing of the steam and the plant milk base to be treated. The material line 33 also insulates the plant milk base, ensuring that the plant milk base entering the flash tank 15 is consistently maintained at the liquid temperature after steam treatment, thereby improving flash evaporation efficiency. The steam inlet 30 is provided at the end of the air intake pipe 46. A one-way valve is provided on the air intake pipe 46 near the steam inlet 30. The one-way valve is provided to prevent the steam from flowing back into the air intake pipe 46. At the same time, the air intake pipe 46 is also provided with an air intake control valve, a filter, an air intake regulating valve and a pressure sensor in sequence. The steam is controlled to be on and off by the air intake control valve. After passing through the air intake control valve, the steam is filtered through the filter to filter the impurities in the steam. The air intake regulating valve is connected to the detector signal on the material pipeline 33. The temperature and pressure of the liquid in the material pipeline 33 are detected by the detector, so that the amount of steam entering the steam injection device 24 is adjusted by the air intake regulating valve.

[0041] like Figure 3As shown, the control sleeve 41 consists of three parts arranged along the axial direction, the first part 42 is located away from the first discharge port 32, and is a cylinder with a boss 38; the second part 43 is a cylinder arranged near the first discharge port 32, and the cylinder diameter of the second part 43 is smaller than the cylinder diameter of the first part 42; the third part 44 is a cylinder with a diameter smaller than the second part 43, and the third part 44 is arranged between the first part 42 and the second part 43, one end of the third part 44 is connected to the second part 43 by an inclined plane, and the other end is connected to the first part 42 by a vertical plane, so that the space of the first annular gap 26 near the first feed port 27 is larger, which is conducive to the smooth flow of material into the first annular gap 26, and the first annular gap 26 gradually narrows in the direction of the tapered end near the rotating shaft 40, so that the material can be mixed with the steam more evenly at a higher flow rate.

[0042] The first sleeve 25 comprises a body 36 and an end cap 37, which are axially removable and connectable. The end cap 37 is mounted around a boss 38 on the control sleeve 41. The end of the body 36 abuts against the end cap 37 and boss 38, securing the first sleeve 25 to the control sleeve 41 via a fastening assembly. The boss 38 prevents the first sleeve 25 from sliding axially. The fastening assembly includes a bolt 34 and a gasket 35, made of rubber. The gasket 35 is positioned at the boss 38 at the connection between the first sleeve 25 and the control sleeve 41. The bolt 34 sequentially passes through the end cap 37, gasket 35, and body 36, securing the first sleeve 25 to the control sleeve 41. The relative axial position of the first sleeve 25 and the control sleeve 41 is adjusted by varying the number or thickness of the gaskets 35, thereby adjusting the size of the first annular gap 26 and, in turn, the inflow rate of the material within the first annular gap 26, thereby controlling the contact area and duration between the steam and the product, achieving different heat treatment effects. For example, by increasing the number of gaskets 35 , the first sleeve 25 moves leftward relative to the control sleeve 41 , thereby increasing the space of the first annular gap 26 and reducing the flow rate of the material entering the merging space 31 through the first annular gap 26 .

[0043] The main body 36 of the first sleeve 25 includes a first cylinder and a second cylinder of different diameters. The diameter of the first cylinder near the first discharge port 32 is smaller than the diameter of the second cylinder farther from the first discharge port 32. The second sleeve 28 is mounted on the first cylinder of the first sleeve 25, with a gap provided between the first cylinder and the second cylinder. An adjustment ring 39 is provided in the gap. The adjustment ring 39 is made of rubber. By adjusting the width of the adjustment ring 39, the relative axial position of the first sleeve 25 and the second sleeve 28 is adjusted to adjust the size of the second annular gap 29, thereby adjusting the size of the contact space between the material and the steam, and thus adjusting the flow rate of the steam flowing into the confluence space 31, thereby achieving different heat treatment effects. For example, increasing the width of the adjustment ring 39 moves the second sleeve 28 to the left, increasing the second annular gap 29, and increasing the contact space between the material and the steam, thereby achieving more uniform mixing of the material and the steam.

[0044] like Figure 1 and Figure 4 As shown, the flash tank 15 includes an inner tank and an outer tank which are nested with each other. A second feed port 18 and a second discharge port 13 are provided at the bottom of the inner tank, and the angle between the axis of the second feed port 18 and the axis of the inner tank is less than 90 degrees, that is, the second feed port 18 is tilted downward on the side wall of the flash tank 15 to lead into the inner tank, so that the plant milk base material after steam treatment enters the inner tank along the wall of the second feed port 18, and the plant milk base material after steam treatment will remove the unstable and volatile substances in the plant milk base material. The volatile substances are activated, and the plant milk base is separated from the unstable and volatile substances through the action of centrifugal force, thereby improving the efficiency of vacuum flash evaporation; the second discharge port 13 is externally connected to an outlet pipeline 21, and the outlet pipeline 21 is provided with a discharge pump 10, a pressure gauge 11 and a regulating valve 12. The treated plant milk base can be transported to the next process through the outlet pipeline 21 by the discharge pump 10; the pressure gauge 11 is mainly used to measure the pressure of the outlet pipeline 21 to avoid damage to the outlet pipeline 21 due to excessive pressure. A first pressure sensor 9 is externally connected to the top of the flash tank 15, and the first pressure sensor 9 is connected to the second pressure sensor 8 provided on the outlet pipeline 21. The first pressure sensor 9, the second pressure sensor 8 and the regulating valve 12 are all connected to the controller signal. The pressure difference between the first pressure sensor 9 and the second pressure sensor 8 is monitored by the controller. When the pressure difference is too large, the controller outputs a signal and then controls the flow rate of the liquid in the outlet pipeline 21 by changing the opening size of the regulating valve 12, thereby adjusting the height of the liquid level in the flash tank 15 and the speed of the discharge pump 10, so as to avoid excessive liquid in the flash tank 15 from overflowing from the space at the top of the flash tank 15 to the interlayer space and then flowing out, causing waste.

[0045] The vacuum pump 1 is connected to the interlayer space through an exhaust pipe 19. The exhaust pipe 19 is connected to an air pipe 20. The air pipe 20 is provided with an air control valve 4. The air control valve 4 is used to control whether air is introduced into the exhaust pipe 19. The vacuum pump 1 evacuates the air in the flash tank 15 and the air pipe 20 to a vacuum state, thereby ensuring that the flash tank 15 is in a vacuum state. The exhaust pipe 19 is also provided with a vacuum controller 2 and a vacuum meter 3. The vacuum meter 3 is used to display the vacuum degree in the flash tank 15. The flash tank 15 is adjusted to a predetermined vacuum degree through the vacuum controller 2, so that the predetermined vacuum degree reaches the boiling temperature corresponding to the preheating temperature, thereby evaporating unstable and volatile substances in the plant milk base.

[0046] A mezzanine space is formed between the inner and outer tanks of flash tank 15, and the top is connected to the mezzanine space. Condenser 17 is arranged along the outer wall of the inner tank and is located in the mezzanine space. Condenser 17 is a spiral coil. The vapor of unstable and volatile substances in the plant milk base evaporated in flash tank 15 flows through the top of flash tank 15 into the mezzanine space. The vapor is condensed by condenser 17 and the condensate is discharged through exhaust line 19. The bottom of flash tank 15 is also provided with a cooling water inlet 6 and a cooling water outlet 5 connected to condenser 17. The cooling water is discharged through cooling water outlet 5 after exchanging heat with the steam. The exhaust pipe 19 is connected to the outlet pipe 21 through the three-way valve 7. The outlet pipe 21 is connected to the cleaning ball 22 on the top of the flash tank 15 through the return pipe 23. The return pipe 23 is provided with a control valve 14. The control valve 14 controls the on-off of the return pipe 23. When cleaning the flash tank 15, the three-way valve 7 is opened to allow the cleaning liquid to flow through all pipes to clean the pipes. The cleaning liquid is transported to the cleaning ball 22 through the return pipe 23, thereby spraying and cleaning the inside of the flash tank 15, thereby improving the cleaning effect of the flash tank 15.

[0047] The exhaust pipe 19 is connected to a safety valve 16 , which controls the air pressure in the flash tank 15 to avoid safety accidents caused by excessive pressure.

[0048] As an alternative embodiment, the second annular gap 29 may also be provided on the second sleeve 28 , with a gap being left between the outer wall of the second sleeve 28 and the outer wall of the first sleeve 25 .

[0049] As an alternative embodiment, the first pressure sensor 9 and the second pressure sensor 8 may also be liquid level gauges installed on the top of the flash tank 15 .

[0050] When flash-evaporating the plant milk base to inactivate enzymes, the first step is to inject steam into the plant milk base to be treated through the steam injection device 24. First, the plant milk base is injected into the steam injection device 24 from the first feed port 27 along the feed pipe 45, so that it enters the tapered end of the rotating shaft 40 along the first annular gap 26; then the clean steam enters the second annular gap 29 from the steam inlet 30 along the air inlet pipe 46, and flows into the tapered end of the rotating shaft 40 along the second annular gap 29. The plant milk base to be treated and the steam contact at the confluence space 31, thereby achieving heating treatment of the plant milk base by steam to passivate the trypsin inhibitor in the plant milk base. At the same time, the unstable and volatile substances in the plant milk base are activated. Finally, the treated plant milk base flows into the flash tank 15 along the material pipe 33 through the first discharge port 32. When the contact area and time between the material and the steam need to be adjusted, it is only necessary to adjust the number or thickness of the gaskets 35 or the width of the adjustment ring 39. This is convenient and easy to implement.

[0051] In the second step, the steam-treated plant milk base is vacuum flash-evaporated through the flash tank 15 to separate the plant milk base from unstable and volatile substances. First, the vacuum pump 1 and the air control valve 4 are turned on, and the vacuum degree in the flash tank 15 is made to reach the boiling temperature corresponding to the preheating temperature by observing the vacuum gauge 3 and adjusting the vacuum controller 2; then cooling water is introduced into the condenser 17, and then the steam-treated plant milk base is transported to the inner tank through the second feed port 18 along the material pipeline 33. The unstable and volatile substances in the steam-treated plant milk base are evaporated, and the steam rises vertically to the top of the flash tank 15, and forms condensate after encountering the condenser 17 arranged in the interlayer space. At this time, the three-way valve 7 is closed, the exhaust pipeline 19 is not connected to the outlet pipeline 21, and the condensate is discharged through the exhaust pipeline 19; finally, the treated plant milk base is extracted by the discharge pump 10 and enters the next process along the outlet pipeline 21.

[0052] When the flash tank 15 in the enzyme-inactivating flash evaporation system of the plant milk base needs to be cleaned, the three-way valve 7 and the control valve 14 are opened, and the cleaning liquid is first transported into the flash tank 15 through the second feed port 18, and then enters the cleaning ball 22 through the outlet pipe 21 and the reflux pipe 23 to spray and clean the flash tank 15. Finally, the control valve 14 is closed, and the cleaning liquid is discharged through the second discharge port 13 at the bottom of the flash tank 15 and the three-way valve 7 on the exhaust pipe 19 through the outlet pipe 21, thereby ensuring that all pipes contacted by the product can be cleaned.

[0053] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A flash evaporation system for inactivating enzymes in plant milk-based materials, characterized in that: include: A flash tank (15) comprises an inner tank and an outer tank nested in each other, an interlayer space being formed between the inner tank and the outer tank, the inner tank having a second feed port (18) and a second discharge port (13), and the top of the inner tank being connected to the interlayer space, the second feed port (18) being connected to a steam injection device (24), the second feed port (18) and the second discharge port (13) being both located at the bottom of the inner tank, and the angle between the axis of the second feed port (18) and the axis of the inner tank being less than 90 degrees; The second discharge port (13) is externally connected to an outlet pipeline (21), and a discharge pump (10) and a regulating valve (12) are provided on the outlet pipeline (21). The outlet pipeline (21) is suitable for conveying the treated base material to the next process. The top of the flash tank (15) is externally connected to a first pressure sensor (9), and the first pressure sensor (9) is connected to a second pressure sensor (8) provided on the outlet pipeline (21). The first pressure sensor (9), the second pressure sensor (8) and the regulating valve (12) are all connected to the controller signal. a vacuum pump (1) connected to the flash tank (15), the vacuum pump (1) being adapted to adjust the flash tank (15) to a predetermined vacuum level, the vacuum pump (1) being connected to the interlayer space via an exhaust line (19); The condenser (17) is arranged in the interlayer space of the flash tank (15) and is suitable for condensing the steam in the flash tank (15).

2. The enzyme inactivation flash evaporation system for plant milk base according to claim 1, characterized in that: The condenser (17) is a spiral coil arranged around the outer wall of the inner tank.

3. The enzyme inactivation flash evaporation system for plant milk base according to claim 1, characterized in that: The outlet pipeline (21) is connected to the exhaust pipeline (19) via a three-way valve (7), and the outlet pipeline (21) is connected to the cleaning ball (22) on the top of the flash tank (15) via a return pipeline (23), and a control valve (14) is provided on the return pipeline (23).

4. The enzyme inactivation flash evaporation system for plant milk base according to any one of claims 1 to 2, characterized in that: The steam injection device (24) comprises: Bushing assembly; A first sleeve (25) is coaxially sleeved on the periphery of the shaft sleeve assembly, and a first annular gap (26) is provided between the inner wall of the first sleeve (25) and the outer wall of the shaft sleeve assembly. A first feed port (27) is provided on the first sleeve (25), and the first feed port (27) is communicated with the first annular gap (26); The second sleeve (28) is coaxially sleeved on the periphery of the first sleeve (25), and a second annular gap (29) is provided between the inner wall of the second sleeve (28) and the outer wall of the first sleeve (25). The second sleeve (28) is provided with a steam inlet (30), and the steam inlet (30) is communicated with the second annular gap (29). A merging space (31) is also provided at the end of the second sleeve (28), and the second annular gap (29) and the first annular gap (26) are both communicated with the merging space (31).

5. The enzyme inactivation flash evaporation system for plant milk base according to claim 4, characterized in that: The second sleeve (28) is arranged near the end of the shaft sleeve assembly and is provided with a first discharge port (32). The merging space (31) is arranged on the periphery of the end of the shaft sleeve assembly. One end of the first discharge port (32) is connected to the merging space (31), and the other end is connected to the second feed port (18) through a material pipeline (33).

6. The enzyme inactivation flash evaporation system for plant milk base according to claim 5, characterized in that: The first sleeve (25) and the shaft sleeve assembly are connected at one end away from the first discharge port (32) by a fastening assembly, and the fastening assembly includes a bolt (34) and a gasket (35). The first sleeve (25) includes a body (36) and an end cover (37) that are axially disassembled and connected. A boss (38) is provided at the connection between the shaft sleeve assembly and the body (36) and the end cover (37). The gasket (35) is provided at the boss (38). The gasket (35) is suitable for adjusting the relative position of the first sleeve (25) and the shaft sleeve assembly in the axial direction to adjust the size of the first annular gap (26). The bolt passes through the end cover (37), the gasket (35) and the body (36) in sequence.

7. The enzyme inactivation flash evaporation system for plant milk base according to claim 6, characterized in that: An end of the second sleeve (28) away from the first discharge port (32) is provided with a gap between the first sleeve (25), and an adjustment ring (39) is provided at the gap. The adjustment ring (39) is suitable for adjusting the relative position of the first sleeve (25) and the second sleeve (28) in the axial direction to adjust the size of the second annular gap (29).

Images