Equipment and process for preparing konjac glucomannan oligosaccharide by combined hydrolysis method

Abstract

The invention relates to the technical field of preparation of konjac glucomannan, and discloses a device and process for preparing konjac glucomannan by a combined hydrolysis method.The device comprises a purification tank connected with a dealcoholization tank, the dealcoholization tank is connected with a premixing tank, and the bottom of the premixing tank is connected with an enzymolysis tank through a communicating pipe; when the dissolving solution in the premixing tank descends and enters the enzymolysis tank, the locking assembly unlocks the scraping block, and when the second stirring assembly rotates, the scraping block is driven by the transmission assembly to do reciprocating rectilinear motion on the surface of the heating block so as to scrape off the solution adhered to the surface of the heating block; the solution adhering to the surface of the heating block can be automatically scraped when the dissolving solution is discharged after premixing is finished, it is ensured that no residual solution exists on the surface of the heating block, the problem that the concentration of the dissolving solution input into an enzymolysis tank cannot reach a threshold value due to the residual solution is avoided, and the problem that the temperature of the dissolving solution cannot reach the threshold value due to the fact that a thick solution adheres to the surface of the heating block can also be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of konjac glucomannan oligosaccharide preparation, and specifically relates to an apparatus and process for preparing konjac glucomannan oligosaccharide by a combined hydrolysis method. Background Art

[0002] The main component of konjac is glucomannan, which is a high molecular polysaccharide formed by connecting glucose and mannose through β-1,4 glycosidic bonds. Konjac glucomannan oligosaccharide is a product obtained by degrading konjac glucomannan through certain technical means.

[0003] In the process of preparing konjac glucomannan oligosaccharide, after the konjac flour is pulverized and dissolved, an enzymatic hydrolysis reaction is required to degrade it into oligosaccharides. In this process, a suitable enzyme needs to be added and stirred thoroughly. At the same time, reaction conditions such as temperature, pH value, and reaction time need to be strictly controlled to ensure the activity of the enzyme and the hydrolysis effect.

[0004] Currently, there are some existing technologies that can perform hierarchical stirring and mixing on the solution during the enzymatic hydrolysis process. For example, the patent publication number is CN212894762U. Its main technical means is that the raw material dissolution process is carried out in a premixing tank, the temperature is controlled by an electric heating wire, and continuous stirring is carried out during the dissolution process to accelerate the dissolution process. After the full dissolution, the valve is opened, and the solution enters the following enzymatic hydrolysis tank through a connecting pipe. After analysis, the disadvantages of this technical solution are as follows: The temperature in the premixing tank is controlled by an electric heating wire. In order to ensure the uniformity of the solution temperature in the premixing tank, the electric heating wire must be arranged in the premixing tank, so the solution will inevitably adhere to the heating element. Moreover, the purpose of premixing before the enzymatic hydrolysis reaction is to mix the purified konjac flour and water to form a solution with a certain concentration. This solution is extremely easy to adhere to the surface of the heating element, which will lead to insufficient solution concentration during enzymatic hydrolysis and thus affect the hydrolysis effect. Prolonged adhesion will also cause the solution in the premixing tank to not be effectively heated to the temperature threshold, so the temperature of the solution participating in the subsequent enzymatic hydrolysis is insufficient, which is extremely likely to affect the smooth progress of the enzymatic hydrolysis reaction. Based on this, the present invention provides an apparatus and process for preparing konjac glucomannan oligosaccharide by a combined hydrolysis method, which has a simple and ingenious structure and can avoid the solution adhering to the surface of the heating element, resulting in the solution concentration and solution temperature during the enzymatic hydrolysis reaction not reaching the threshold. Summary of the Invention

[0005] The purpose of the present invention is to provide an apparatus and process for preparing konjac glucomannan oligosaccharide by a combined hydrolysis method in view of the deficiencies of the prior art, so as to solve the technical problem that the solution in the premixing tank is extremely easy to adhere to the heating element, resulting in the solution concentration and solution temperature during the enzymatic hydrolysis reaction not reaching the threshold, and causing low efficiency in the preparation of konjac glucomannan oligosaccharide.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] An apparatus for preparing konjac glucomannan oligosaccharide by a combined hydrolysis method, comprising:

[0008] A purification tank, which is connected to a de-alcoholization tank, and the de-alcoholization tank is connected to a premixing tank. The bottom of the premixing tank is connected to an enzymolysis tank through a connecting pipe, and a solenoid valve is arranged on the connecting pipe. A first stirring component and a second stirring component are respectively arranged in the enzymolysis tank and the premixing tank. The enzymolysis tank is connected to a separation tank, and the separation tank is connected to a concentration tank;

[0009] Heating blocks, a plurality of heating blocks are arranged on the side wall of the premixing tank, and a scraping block is slidably mounted on each heating block. A locking component for locking the scraping block is arranged in the premixing tank; and

[0010] A transmission component, which is installed in the premixing tank and connected to the second stirring component; when premixing is carried out in the premixing tank, the scraping block is locked by the locking component. When the premixing tank conveys the dissolution liquid to the enzymolysis tank, the locking component releases the locking of the scraping block, and at the same time, the second stirring component drives the scraping block to perform a reciprocating linear motion on the heating block through the transmission component.

[0011] As a further scheme of the present invention: a plurality of receiving grooves for receiving a plurality of scraping blocks are arranged on the side wall of the premixing tank; when premixing is carried out in the premixing tank, the scraping block is locked by the locking component. At this time, the plurality of scraping blocks are respectively located in the plurality of receiving grooves, and the surface of the scraping block close to the axis of the premixing tank is flush with the side wall surface of the premixing tank.

[0012] As a further scheme of the present invention: the second stirring component includes:

[0013] A rotating shaft, which is coaxially rotatably connected to the premixing tank and is driven to rotate by an external driving source; and

[0014] Stirring blades, a plurality of stirring blades are arranged on the rotating shaft.

[0015] As a further scheme of the present invention: the transmission component includes:

[0016] Magnetic parts, a plurality of magnetic parts are respectively arranged at the ends of the plurality of stirring blades far from the rotating shaft. The scraping block is made of a magnetic material, and the scraping block and the magnetic parts are magnetically repulsive; and

[0017] Elastic parts, the scraping block is connected to the inner wall of the receiving groove through the elastic parts; when the scraping block is located in the receiving groove, the elastic parts are in a contracted state.

[0018] As a further scheme of the present invention: the locking component includes:

[0019] A floating ball is installed at one end of a connecting rod. The other end of the connecting rod is slidably installed in a guide rail, and the guide rail is provided on the side wall of a heating block. The guide rail is arranged obliquely, and the end close to the receiving groove is higher in height than the end far from the receiving groove; and

[0020] A pushing block is fixed on the connecting rod; when premixing is carried out in the premixing tank, the buoyancy of the dissolving liquid makes the floating ball located at the highest point of its moving path, that is, the connecting rod is located at the end of the guide rail close to the receiving groove, and the pushing block abuts against the scraping block to make it located in the receiving groove.

[0021] As a further solution of the present invention: shielding members are provided on both sides of the connecting rod. The edge of the shielding member is slidably engaged with the guide rail, and its two ends are fixedly connected to the ends of the guide rail.

[0022] As a further solution of the present invention: a spray pipe is arranged in the enzymolysis tank. A number of spray heads are connected to the spray pipe, and the spray heads are arranged towards the first stirring assembly. The spray pipe is located at the gap between the connecting pipe and the first stirring assembly.

[0023] As a further solution of the present invention: a flow dividing rod is arranged on the surface of the spray pipe facing the connecting pipe. A number of grooves are formed on the flow dividing rod, and the grooves are arranged in a staggered manner with the spray heads.

[0024] A process for preparing konjac glucomannan oligosaccharide by combined hydrolysis method is applied to the equipment for preparing konjac glucomannan oligosaccharide by combined hydrolysis method as described above. The process includes the following specific steps:

[0025] Step S1: Input konjac refined powder into a purification tank, then add an ethanol solution thereto, and stir at room temperature to obtain wet konjac refined powder;

[0026] Step S2: Input the wet konjac refined powder into a de-alcoholization tank for de-alcoholization treatment to obtain konjac refined powder;

[0027] Step S3: Input the konjac refined powder into a premixing tank, then add water thereto, and then start the second stirring assembly to stir the solution in the premixing tank. At the same time, the heating block is turned on to heat the solution in the premixing tank, and a dissolving liquid is obtained after premixing;

[0028] Step S4: Open the connecting pipe to make the dissolving liquid in the premixing tank descend into the enzymolysis tank. During this process, the locking assembly releases the locking of the scraping block. When the second stirring assembly rotates, it drives the scraping block to perform a reciprocating linear motion on the surface of the heating block through the transmission assembly to scrape off the solution adhered to the surface of the heating block;

[0029] Step S5: Close the connecting pipe, and sequentially spray a pH regulator and β-mannanase into the enzymolysis tank through the spray pipe, and at the same time start the first stirring assembly to stir the solution in the enzymolysis tank;

[0030] Step S6: Heat the enzymatic hydrolysis tank to achieve enzyme inactivation treatment to obtain a mixture;

[0031] Step S7: Input the mixture into a separation tank for solid-liquid separation treatment to obtain a liquid product;

[0032] Step S8: Input the liquid product into a concentration tank, and remove the excess water to obtain konjac glucomannan oligosaccharide.

[0033] Advantages of the present invention:

[0034] (1) In the present invention, the second stirring assembly stirs the solution in the premixing tank for premixing, and at the same time, the heating block is turned on to heat the solution in the premixing tank. After premixing, a dissolved solution is obtained. Subsequently, the communication pipe is opened to make the dissolved solution in the premixing tank drop into the enzymatic hydrolysis tank. During this process, the locking assembly releases the lock on the scraping block. Then, when the second stirring assembly rotates, the scraping block is driven by the transmission assembly to perform a reciprocating linear motion on the surface of the heating block to scrape off the solution adhered to the surface of the heating block. Thus, when the dissolved solution is discharged after premixing, the solution adhered to the surface of the heating block can be automatically scraped off, ensuring that there is no residual solution on the surface of the heating block, avoiding the problem that the concentration of the dissolved solution input into the enzymatic hydrolysis tank fails to reach the threshold due to the residual solution, and also avoiding the problem that the temperature of the dissolved solution cannot reach the threshold due to a thick layer of solution adhering to the surface of the heating block;

[0035] (2) In the present invention, during the premixing process in the premixing tank, the scraping block is locked in position and does not extend out of the receiving groove, which can avoid the problem that the setting of the scraping block affects the effective flow and mixing of the dissolved solution in the premixing tank, thereby avoiding the problem of the reduction of the premixing efficiency caused by the scraping block;

[0036] (3) In the present invention, during the process of the premixing tank transporting the dissolved solution to the enzymatic hydrolysis tank, the locking assembly releases the lock on the scraping block, and the elastic force of the elastic member restoring deformation makes the scraping block located at the end of the heating block away from the receiving groove. When the stirring blade rotates and the magnetic member turns to the position of the scraping block, the magnetic repulsive force causes the scraping block to move towards the direction close to the receiving groove. During this process, the elastic member gradually contracts until the magnetic member turns away from the range of the magnetic repulsive force between it and the scraping block, then the scraping block slides in the reverse direction, that is, gradually away from the receiving groove, so as to realize the reciprocating linear motion of the scraping block, thereby realizing the scraping effect of the scraping block on the solution adhered to the surface of the heating block;

[0037] (4) In the present invention, the dissolved solution falling from the top of the enzymatic hydrolysis tank lands on the flow dividing rod and flows down through the groove, and the groove is arranged in a dislocation manner with the spray head. In this way, it can be ensured that the dissolved solution will not adhere to and block the nozzle of the spray head, ensuring that the pH regulator and β-mannanase can be smoothly sprayed out subsequently, thereby ensuring the smooth progress of the enzymatic hydrolysis reaction. Description of the Drawings

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0040] Figure 2 is a schematic diagram of the structure of the heating block in the present invention;

[0041] Figure 3 is a schematic diagram of the structure of the transmission component in the present invention;

[0042] Figure 4 is a schematic diagram of the structure of the locking component in the present invention;

[0043] Figure 5 is a schematic diagram of the structure of the connecting rod in the present invention;

[0044] Figure 6 is in the present invention Figure 2 is a partial enlarged schematic diagram of part A.

[0045] In the figure: 1, enzymatic hydrolysis tank; 2, premixing tank; 3, first stirring component; 4, second stirring component; 401, rotating shaft; 402, stirring blade; 5, heating block; 6, scraping block; 7, transmission component; 701, magnetic part; 702, elastic part; 8, locking component; 801, floating ball; 802, connecting rod; 803, pushing block; 804, guide rail; 805, shielding part; 806, clamping block; 9, inclined plane; 10, connecting pipe; 11, spray pipe; 12, spray head; 13, shunt rod; 14, groove; 15, receiving groove. Specific embodiments

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0047] Please refer to Figures 1-6 as shown, the present invention is a device for preparing konjac glucomannan oligosaccharide by a combined hydrolysis method, including:

[0048] A purification tank, which is connected to a de-alcoholization tank, and the de-alcoholization tank is connected to the premixing tank 2. The bottom of the premixing tank 2 is connected to the enzymatic hydrolysis tank 1 through a connecting pipe 10. An electromagnetic valve is provided on the connecting pipe 10. A first stirring component 3 and a second stirring component 4 are respectively arranged in the enzymatic hydrolysis tank 1 and the premixing tank 2. The enzymatic hydrolysis tank 1 is connected to a separation tank, and the separation tank is connected to a concentration tank;

[0049] Heating blocks 5, a plurality of heating blocks 5 are provided on the side wall of the premixing tank 2, and a scraping block 6 is slidably mounted on each heating block 5. A locking assembly 8 for locking the scraping block 6 is provided in the premixing tank 2; and

[0050] A transmission assembly 7 is installed in the premixing tank 2 and is connected to the second stirring assembly 4; when premixing is carried out in the premixing tank 2, the scraping block 6 is locked by the locking assembly 8. When the premixing tank 2 conveys the dissolution solution to the enzymatic hydrolysis tank 1, the locking assembly 8 releases the locking of the scraping block 6, and at the same time, the second stirring assembly 4 drives the scraping block 6 to perform a reciprocating linear motion on the heating block 5 through the transmission assembly 7.

[0051] In one case of this embodiment, an inclined surface 9 is provided on one side of the heating block 5 close to the axis of the premixing tank 2. When the scraping block 6 is at the end of its moving path close to the axis of the premixing tank 2, the dissolution solution scraped by it is pushed onto the inclined surface 9 and flows down along the inclined surface 9, and finally flows into the enzymatic hydrolysis tank 1 through the connecting pipe 10 at the bottom of the premixing tank 2.

[0052] It should be noted that a monitoring assembly is provided in the enzymatic hydrolysis tank 1 for monitoring data such as the temperature, pH value, and reaction time in the enzymatic hydrolysis tank 1; the heating block 5 includes an electric heating wire and a power supply; a jacket capable of introducing hot water is provided on the outer wall of the enzymatic hydrolysis tank 1 for performing enzyme inactivation treatment in a heating manner after the enzymatic hydrolysis reaction; the monitoring assembly, the heating block 5, the jacket, and the solenoid valve are all prior arts, and this application has not improved them. Therefore, it is not necessary to disclose their specific mechanical structures and circuit structures, which does not affect the integrity of this application.

[0053] In actual application of this embodiment, first, konjac refined powder is input into the purification tank, then an ethanol solution is added thereto, and stirring is carried out at room temperature. Subsequently, the obtained wet konjac refined powder is input into the de-alcoholization tank for de-alcoholization treatment to obtain konjac refined powder. Then, the konjac refined powder is input into the premixing tank 2, and water is added thereto. The second stirring assembly 4 is started to stir the solution in the premixing tank 2. At the same time, the heating block 5 is turned on and heats the solution in the premixing tank 2. After premixing, a dissolved solution is obtained. Subsequently, the connecting pipe 10 is opened so that the dissolved solution in the premixing tank 2 drops into the enzymolysis tank 1. During this process, the locking assembly 8 releases the locking of the scraping block 6. Then, when the second stirring assembly 4 rotates, it drives the scraping block 6 to perform a reciprocating linear motion on the surface of the heating block 5 through the transmission assembly 7 to scrape off the solution adhered to the surface of the heating block 5. Thus, when the dissolved solution is discharged after premixing, the solution adhered to the surface of the heating block 5 can be automatically scraped off, ensuring that no solution remains on the surface of the heating block 5, avoiding the problem that the concentration of the dissolved solution input into the enzymolysis tank 1 fails to reach the threshold due to the remaining solution, and also being able to avoid the problem that the temperature of the dissolved solution cannot reach the threshold due to a relatively thick solution adhering to the surface of the heating block 5; after all the dissolved solution is input into the enzymolysis tank 1, the connecting pipe 10 is closed, and a pH regulator and β-mannanase are sequentially sprayed into the enzymolysis tank 1 through the spray pipe 11. At the same time, the first stirring assembly 3 is started to stir the solution in the enzymolysis tank 1. Subsequently, the enzymolysis tank 1 is heated to achieve enzyme inactivation treatment. Then, the obtained mixture is input into the separation tank for solid-liquid separation treatment to obtain a liquid product. Finally, the liquid product is input into the concentration tank, and excess water is removed to obtain konjac glucomannan oligosaccharide.

[0054] As Figures 1-2 shown, as a preferred embodiment of the present invention, a plurality of receiving grooves 15 for receiving a plurality of scraping blocks 6 are provided on the side wall of the premixing tank 2; when premixing is carried out in the premixing tank 2, the scraping blocks 6 are locked by the locking assembly 8. At this time, the plurality of scraping blocks 6 are respectively located in the plurality of receiving grooves 15, and the surface of the scraping block 6 close to the axis of the premixing tank 2 is flush with the side wall surface of the premixing tank 2.

[0055] In actual application of this embodiment, during the premixing process in the premixing tank 2, the scraping blocks 6 do not protrude from the receiving grooves 15, which can avoid the problem that the setting of the scraping blocks 6 affects the effective flow and mixing of the dissolved solution in the premixing tank 2, thereby avoiding the problem that the premixing efficiency is reduced due to the scraping blocks 6.

[0056] As Figures 2-3 shown, as a preferred embodiment of the present invention, the second stirring assembly 4 includes:

[0057] a rotating shaft 401, which is coaxially rotatably connected to the premixing tank 2 and is driven to rotate by an external driving source; and

[0058] stirring blades 402, and a plurality of stirring blades 402 are provided on the rotating shaft 401.

[0059] In a case of this embodiment, as Figures 2-3 shown, a plurality of the stirring blades 402 are arranged in a single row; the first stirring assembly 3 includes a main shaft rotatably installed coaxially with the enzymolysis tank 1 and a plurality of stirring paddles arranged on the main shaft, and the main shaft is driven to rotate by an external drive source.

[0060] Among them, the external drive source can be a motor assembly, or a gear assembly or a pulley assembly driven by a motor, as long as it can make the rotating shaft 401 rotate. This embodiment does not specifically limit this here.

[0061] In actual application of this embodiment, the external drive source drives the rotating shaft 401 to rotate, which can drive a plurality of stirring blades 402 to rotate synchronously, thereby stirring and mixing the solution in the premixing tank 2.

[0062] As Figures 2-4 shown, as a preferred embodiment of the present invention, the transmission assembly 7 includes:

[0063] Magnetic members 701, a plurality of the magnetic members 701 are respectively arranged at the ends of a plurality of stirring blades 402 away from the rotating shaft 401, the scraping block 6 is made of a magnetic material, and the scraping block 6 is magnetically repulsive from the magnetic members 701; and

[0064] Elastic members 702, the scraping block 6 is connected to the inner wall of the receiving groove 15 through the elastic members 702; when the scraping block 6 is located in the receiving groove 15, the elastic members 702 are in a contracted state.

[0065] In a case of this embodiment, the magnetic members 701 can be selected as permanent magnets, or can be selected as electromagnets connected to an electromagnetic module. This embodiment does not specifically limit this here; the elastic members 702 can be selected as Figure 4 shown elastic telescopic rods, or other elastic components can be selected for replacement, such as springs, elastic sheets, etc., which will not be elaborated here.

[0066] In actual application of this embodiment, during the process of the premixing tank 2 transporting the dissolving liquid to the enzymolysis tank 1, the locking assembly 8 releases the locking of the scraping block 6, then the elastic force of the elastic members 702 restoring deformation makes the scraping block 6 located at the end of the heating block 5 away from the receiving groove 15. When the stirring blade 402 rotates to make the magnetic member 701 turn to the position of the scraping block 6, the magnetic repulsive force makes the scraping block 6 move in the direction close to the receiving groove 15. During this process, the elastic members 702 gradually contract until the magnetic member 701 turns away from the range of the magnetic repulsive force between it and the scraping block 6, then the scraping block 6 slides in the reverse direction, that is, gradually moves away from the receiving groove 15. In this way, the reciprocating linear motion of the scraping block 6 is realized, so as to realize the scraping effect of the scraping block 6 on the solution adhered to the surface of the heating block 5.

[0067] As Figures 2-5As shown, as a preferred embodiment of the present invention, the locking assembly 8 includes:

[0068] A floating ball 801, which is installed at one end of a connecting rod 802. The other end of the connecting rod 802 is slidably installed in a guide rail 804, and the guide rail 804 is provided on the side wall of the heating block 5. The guide rail 804 is arranged obliquely, and the height of the end close to the receiving groove 15 is higher than the height of the end far from the receiving groove 15; and

[0069] A push block 803, which is fixed on the connecting rod 802; when premixing is carried out in the premixing tank 2, the buoyancy of the solution makes the floating ball 801 located at the highest point of its moving path, that is, the connecting rod 802 is located at the end of the guide rail 804 close to the receiving groove 15, and the push block 803 abuts against the scraping block 6 to make it located in the receiving groove 15.

[0070] In a case of this embodiment, shielding members 805 are provided on both sides of the connecting rod 802. The edge of the shielding member 805 is slidably engaged with the guide rail 804, and its two ends are fixedly connected to the ends of the guide rail 804; a plurality of clamping blocks 806 are fixed on the edge of the shielding member 805, and the clamping blocks 806 are slidably engaged with the inner wall of the guide rail 804.

[0071] Wherein, the buoyancy of the solution on the floating ball 801 is greater than the elastic limit of the elastic member 702; the shielding member 805 can be a folding plate or a structural member such as a rubber pad that can deform, which will not be elaborated here.

[0072] In actual application of this embodiment, during the premixing process in the premixing tank 2, the premixing tank 2 is filled with the solution, then the buoyancy of the solution makes the floating ball 801 located at the highest point of its moving path, that is, the connecting rod 802 is located at the end of the guide rail 804 close to the receiving groove 15, and the push block 803 abuts against the scraping block 6 to make it located in the receiving groove 15, that is, at this time the scraping block 6 is locked in position and cannot move; when the premixing tank 2 conveys the solution to the enzymatic hydrolysis tank 1, the liquid level in the premixing tank 2 gradually drops, then the floating ball 801 gradually drops. During this process, the connecting rod 802 slides down obliquely in the guide rail 804, and the push block 803 slides down obliquely synchronously, gradually releasing the locking of the scraping block 6. At the same time, the scraping block 6 can move in the direction away from the receiving groove 15 by cooperating with the elastic force of the elastic member 702 to recover its deformation, and scrape the solution adhered to the surface of the heating block 5.

[0073] As Figures 2-6 shown, as a preferred embodiment of the present invention, a spray pipe 11 is provided in the enzymatic hydrolysis tank 1. A plurality of spray heads 12 are connected to the spray pipe 11, and the spray heads 12 are arranged facing the first stirring assembly 3. The spray pipe 11 is located at the gap between the connecting pipe 10 and the first stirring assembly 3.

[0074] In a case of this embodiment, a flow dividing rod 13 is arranged on the surface of the spray pipe 11 facing the communicating pipe 10. A plurality of grooves 14 are formed in the flow dividing rod 13, and the grooves 14 are arranged in a dislocation manner with respect to the spray heads 12.

[0075] In actual application of this embodiment, the pH regulator and β-mannanase are successively input into the enzymolysis tank 1 through the spray heads 12, which can ensure that the pH value required for the enzymolysis reaction is reached in the enzymolysis tank 1 and supply enzymes for the enzymolysis reaction. When the premixing tank 2 transports the dissolution solution to the enzymolysis tank 1, the dissolution solution falling from the top of the enzymolysis tank 1 lands on the flow dividing rod 13 and flows downward through the grooves 14. The grooves 14 are arranged in a dislocation manner with respect to the spray heads 12, so as to ensure that the dissolution solution will not adhere to and block the nozzles of the spray heads 12, ensuring that the pH regulator and β-mannanase can be smoothly sprayed out subsequently, thereby ensuring the smooth progress of the enzymolysis reaction.

[0076] Please refer to Figures 1-6 As shown, the present invention is a process for preparing konjac glucomannan oligosaccharide by combined hydrolysis. The process is applied to a device for preparing konjac glucomannan oligosaccharide by combined hydrolysis as described in the above embodiment. The process includes the following specific steps:

[0077] Step S1: Input konjac flour into the purification tank, then add an ethanol solution thereto, and stir at room temperature to obtain wet konjac flour.

[0078] Step S2: Input the wet konjac flour into the alcohol removal tank for alcohol removal treatment to obtain konjac flour.

[0079] Step S3: Input the konjac flour into the premixing tank 2, then add water thereto, and then start the second stirring assembly 4 to stir the solution in the premixing tank 2. At the same time, the heating block 5 is turned on to heat the solution in the premixing tank 2, and a dissolution solution is obtained after premixing.

[0080] Step S4: Open the communicating pipe 10 to make the dissolution solution in the premixing tank 2 descend into the enzymolysis tank 1. During this process, the locking assembly 8 releases the lock on the scraping block 6. When the second stirring assembly 4 rotates, it drives the scraping block 6 to perform a reciprocating linear motion on the surface of the heating block 5 through the transmission assembly 7 to scrape off the solution adhering to the surface of the heating block 5.

[0081] Step S5: Close the communicating pipe 10, and sequentially spray a pH regulator and β-mannanase into the enzymolysis tank 1 through the spray pipe 11. At the same time, start the first stirring assembly 3 to stir the solution in the enzymolysis tank 1.

[0082] Step S6: Heat the enzymolysis tank 1 to perform enzyme inactivation treatment to obtain a mixture.

[0083] Step S7: Input the mixture into the separation tank for solid-liquid separation treatment to obtain a liquid product.

[0084] Step S8: Input the liquid product into the concentration tank, and obtain konjac glucomannan oligosaccharide after removing the excess water.

[0085] Working principle of the present invention: In the above embodiments of the present invention, an apparatus and process for preparing konjac glucomannan oligosaccharide by a combined hydrolysis method are provided. The second stirring assembly 4 stirs the solution in the premixing tank 2 for premixing, and at the same time, the heating block 5 is turned on to heat the solution in the premixing tank 2. After premixing, a dissolved solution is obtained. Subsequently, the connecting pipe 10 is opened so that the dissolved solution in the premixing tank 2 descends into the enzymatic hydrolysis tank 1. During this process, the locking assembly 8 releases the locking of the scraping block 6. Then, when the second stirring assembly 4 rotates, the scraping block 6 is driven by the transmission assembly 7 to perform a reciprocating linear motion on the surface of the heating block 5 to scrape off the solution adhering to the surface of the heating block 5. Thus, when the dissolved solution is discharged after premixing, the solution adhering to the surface of the heating block 5 can be automatically scraped off, ensuring that no solution remains on the surface of the heating block 5, avoiding the problem that the concentration of the dissolved solution input into the enzymatic hydrolysis tank 1 fails to reach the threshold due to the remaining solution, and also avoiding the problem that the temperature of the dissolved solution cannot reach the threshold due to a thick layer of solution adhering to the surface of the heating block 5.

[0086] The above has described in detail one embodiment of the present invention, but the content described is only the preferred embodiment of the present invention and cannot be considered as used to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention shall still fall within the scope covered by the patent of the present invention.

Claims

1. An apparatus for preparing konjac glucomannan oligosaccharide by a combined hydrolysis method, characterized in that, Comprising: A purification tank, which is connected to a de-alcoholization tank, and the de-alcoholization tank is connected to a premixing tank (2). The bottom of the premixing tank (2) is connected to an enzymolysis tank (1) through a communication pipe (10). A solenoid valve is provided on the communication pipe (10). First stirring assemblies (3) and second stirring assemblies (4) are respectively arranged in the enzymolysis tank (1) and the premixing tank (2). The enzymolysis tank (1) is connected to a separation tank, and the separation tank is connected to a concentration tank; Heating blocks (5), a plurality of heating blocks (5) are arranged on the side wall of the premixing tank (2), and a scraping block (6) is slidably installed on each heating block (5). A locking assembly (8) for locking the scraping block (6) is arranged in the premixing tank (2); and A transmission assembly (7), which is installed in the premixing tank (2) and connected to the second stirring assembly (4); when premixing is carried out in the premixing tank (2), the scraping block (6) is locked by the locking assembly (8). When the premixing tank (2) conveys the dissolution liquid to the enzymolysis tank (1), the locking assembly (8) releases the locking of the scraping block (6), and at the same time, the second stirring assembly (4) drives the scraping block (6) to perform a reciprocating linear motion on the heating block (5) through the transmission assembly (7).

2. The apparatus for preparing konjac glucomannan oligosaccharide by the combined hydrolysis method according to claim 1, characterized in that, A plurality of receiving grooves (15) for receiving a plurality of scraping blocks (6) are arranged on the side wall of the premixing tank (2); when premixing is carried out in the premixing tank (2), the scraping block (6) is locked by the locking assembly (8). At this time, the plurality of scraping blocks (6) are respectively located in the plurality of receiving grooves (15), and the surface of the scraping block (6) close to the axis of the premixing tank (2) is flush with the side wall surface of the premixing tank (2).

3. The apparatus for preparing konjac glucomannan oligosaccharide by the combined hydrolysis method according to claim 2, characterized in that, The second stirring assembly (4) includes: A rotating shaft (401), which is coaxially and rotationally connected to the premixing tank (2) and is driven to rotate by an external driving source; and Stirring blades (402), a plurality of stirring blades (402) are arranged on the rotating shaft (401).

4. The apparatus for preparing konjac glucomannan oligosaccharide by the combined hydrolysis method according to claim 3, wherein, The transmission assembly (7) includes: Magnetic members (701), a plurality of the magnetic members (701) are respectively arranged at the ends of the plurality of stirring blades (402) away from the rotating shaft (401). The scraping block (6) is made of a magnetic material, and the scraping block (6) is magnetically repulsive to the magnetic members (701); and Elastic members (702), the scraping block (6) is connected to the inner wall of the receiving groove (15) through the elastic members (702); when the scraping block (6) is located in the receiving groove (15), the elastic members (702) are in a contracted state.

5. An apparatus for preparing konjac glucomannan oligosaccharide by a combined hydrolysis method according to claim 4, characterized in that, The locking assembly (8) includes: A floating ball (801), which is installed at one end of a connecting rod (802). The other end of the connecting rod (802) is slidably installed in a guide rail (804), and the guide rail (804) is opened on the side wall of the heating block (5). The guide rail (804) is inclined, and the end close to the receiving groove (15) is higher in height than the end away from the receiving groove (15); and A pushing block (803) fixed to the connecting rod (802); when premixing is carried out in the premixing tank (2), the buoyancy of the dissolving liquid makes the floating ball (801) located at the highest point of its moving path, that is, the connecting rod (802) is located at the end of the guide rail (804) close to the receiving groove (15), and the pushing block (803) abuts against the scraping block (6) to make it located in the receiving groove (15).

6. The apparatus for preparing konjac glucomannan oligosaccharide by the combined hydrolysis method according to claim 5, characterized in that, Blocking members (805) are arranged on both sides of the connecting rod (802), the edge of the blocking member (805) is slidably matched with the guide rail (804), and its two ends are fixedly connected to the ends of the guide rail (804).

7. An apparatus for preparing konjac glucomannan oligosaccharide by a combined hydrolysis method according to claim 1, characterized in that, A spray pipe (11) is arranged in the enzymolysis tank (1), a number of spray heads (12) are connected to the spray pipe (11), and the spray heads (12) are arranged facing the first stirring assembly (3), and the spray pipe (11) is located at the gap between the connecting pipe (10) and the first stirring assembly (3).

8. An apparatus for preparing konjac glucomannan oligosaccharide by a combined hydrolysis method according to claim 7, characterized in that, A flow dividing rod (13) is arranged on the surface of the spray pipe (11) facing the connecting pipe (10), a number of grooves (14) are formed on the flow dividing rod (13), and the grooves (14) are arranged in a staggered manner with the spray heads (12).

9. A process for preparing konjac glucomannan oligosaccharide by a combined hydrolysis method, characterized in that, The process is applied to a device for preparing konjac glucomannan oligosaccharide by a combined hydrolysis method as described in any one of claims 1-8 above, and the process comprises the following specific steps: Step S1: Input konjac flour into the purification tank, then add an ethanol solution thereto, and stir at room temperature to obtain wet konjac flour; Step S2: Input the wet konjac flour into a de-alcoholization tank for de-alcoholization treatment to obtain konjac flour; Step S3: Input the konjac flour into the premixing tank (2), then add water thereto, and then start the second stirring assembly (4) to stir the solution in the premixing tank (2), and at the same time, the heating block (5) is turned on to heat the solution in the premixing tank (2), and a dissolving liquid is obtained after premixing; Step S4: Open the connecting pipe (10) to make the dissolving liquid in the premixing tank (2) drop into the enzymolysis tank (1). During this process, the locking assembly (8) releases the locking of the scraping block (6), and when the second stirring assembly (4) rotates, it drives the scraping block (6) to perform a reciprocating linear motion on the surface of the heating block (5) to scrape off the solution adhered to the surface of the heating block (5); Step S5: Close the connecting pipe (10), spray a pH regulator and β-mannanase into the enzymolysis tank (1) in sequence through the spray pipe (11), and at the same time start the first stirring assembly (3) to stir the solution in the enzymolysis tank (1); Step S6: Heat the enzymolysis tank (1) to achieve enzyme inactivation treatment to obtain a mixture; Step S7: Input the mixture into a separation tank for solid-liquid separation treatment to obtain a liquid product; Step S8: Input the liquid product into a concentration tank, and remove the excess water to obtain konjac glucomannan oligosaccharide.

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