Polydextrose production process and production device

Abstract

The invention relates to the technical field of polydextrose production, and discloses a polydextrose production process and a polydextrose production device.The polydextrose production process comprises the following steps that S100, raw materials comprise 73%-94.9% of glucose, 0.1%-7% of citric acid and 5%-20% of sorbitol; mixing the glucose, the citric acid and the sorbitol; and S200, heating the raw materials to 50-200 DEG C in a reaction kettle under the vacuum condition of-0.06--0.1 MPa, controlling the reaction time to be 4-8 hours, and maintaining the vacuum degree in the reaction kettle by adopting a steam jet pump. According to the polydextrose production process, a vacuum condition is rapidly established through a steam-jet pump and is stabilized between-0.06 MPa and-0.1 MPa. According to the design, the boiling point of a reaction system is effectively reduced, the reaction is carried out at a relatively low temperature, degradation of heat-sensitive components is reduced, and the product quality is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of polydextrose production, and in particular to a polydextrose production process and a production device. Background Art

[0002] Polydextrose is a functional food additive. As a low-calorie soluble dietary fiber, it promotes intestinal health and lowers blood sugar and blood lipids. At the same time, it can also be used as a filler, thickener, stabilizer and formulation aid for low-calorie foods in the food system. Compared with natural water-soluble dietary fibers such as pectin and carob bean gum with a relative molecular weight of hundreds of thousands, these high-molecular-weight fibers easily form gel clumps in water, which is not convenient for consumers to use directly according to their own needs. Polydextrose has a moderate relative molecular weight and can be completely dissolved in water, making it more convenient to use. In addition, it can be industrialized and is widely used in the food, beverage and health care products industries.

[0003] However, the existing polydextrose products generally have a polymer content of only about 60-70%, a relatively low content and a relatively high reducing sugar content, generally reaching more than 20%; the pH is too acidic, reaching a pH value of 2. The reason for this is that there are some defects in its production process, such as insufficient vacuum in the polymerization reaction, which makes it difficult to reach the high temperature required for the reaction under this condition, affecting the physical properties and quality stability of the product. Summary of the invention

[0004] Based on the above background issues, the present invention aims to provide a polydextrose production process to solve the problem that the existing polydextrose products have insufficient vacuum degree in the polymerization reaction and are difficult to reach the high temperature required for the reaction under such conditions, thus affecting the physical properties and quality stability of the product.

[0005] To achieve the above objectives, on the one hand, the technical solution provided by the embodiments of the present invention is: A polydextrose production process comprises the following steps: S100, raw materials include glucose 73%-94.9%, citric acid 0.1%-7%, sorbitol 5%-20%; mixed glucose, citric acid and sorbitol; S200, heating the raw materials to 50°C-200°C in a reactor under a vacuum condition of -0.06~-0.1MPa, controlling the reaction time to 4-8 hours, and using a steam jet pump to maintain the vacuum degree in the reactor; S300, cooling the molten polydextrose and solidifying it into a uniform sheet; S400, crushing the cooled polydextrose tablets.

[0006] Furthermore, in S200, the polymerization degree of the material is monitored in real time by an online spectrometer built into the reactor.

[0007] Furthermore, in the S300, a double steel belt flaker with upper and lower circulation double cooling is adopted, and the steel belt is doubly cooled by combining cold air and cold water.

[0008] Furthermore, the reaction kettle, steam jet pump and double steel belt flaker are all connected to a PLC controller.

[0009] On the other hand, an embodiment of the present invention provides a polydextrose production device, including a reactor and a steam jet pump arranged on one side of the reactor, a buffer tank is arranged between the reactor and the steam jet pump, the air inlet of the buffer tank is connected to the air outlet of the reactor through a pipeline, and the air outlet of the buffer tank is connected to the air inlet of the steam jet pump through a quick-connect assembly.

[0010] Further, the quick-connect assembly includes a clamping cylinder arranged on the inner side of the steam jet pump air inlet through a dynamic seal, and a first mounting claw is symmetrically arranged on the outer wall of the clamping cylinder, and a fixed cylinder is arranged at the air outlet of the buffer tank, and a second mounting claw is symmetrically arranged on the outer wall of the fixed cylinder; The openings of the clamping tube and the fixing tube are both provided with sealing gaskets.

[0011] Furthermore, the second mounting claw and the first mounting claw are both in a "C" shape as a whole, and the second mounting claw and the first mounting claw are arranged opposite to each other.

[0012] Furthermore, a first guide block is integrally formed on the outer wall of the clamping cylinder, and the first guide block includes a first arc segment and a first parallel segment connected to one side of the first arc segment, and the first parallel segment is located on the inner side of the first mounting claw.

[0013] Furthermore, a second guide block is integrally formed on the outer wall of the fixing cylinder, and the second guide block includes a second arc segment and a second parallel segment connected to one side of the second arc segment, and the second parallel segment is located on the inner side of the second mounting claw.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention quickly establishes vacuum conditions through a steam jet pump and stabilizes it between -0.06 and -0.1 MPa. This design effectively reduces the boiling point of the reaction system, allowing the reaction to proceed at a lower temperature, reducing the degradation of heat-sensitive components and significantly improving product quality.

[0015] 2. In the present invention, when the steam jet pump is working to extract the gas in the reactor, the gas first enters the buffer tank. When the steam jet pump has pressure fluctuations, such as instantaneous changes in the pumping capacity, the gas stored in the buffer tank can play a supplementary or buffering role, maintaining the relative stability of the vacuum degree in the reactor, and providing a stable environment for the polymerization reaction.

[0016] 3. In the present invention, when the steam jet pump is completely close to the buffer tank, the first arc segment and the second arc segment can guide the clamping tube and the fixed tube to be accurately centered, so that the operator can more easily align the clamping tube with the fixed tube during installation, which greatly improves the convenience and accuracy of installation. In addition, during the rotation process, the sealing gasket can be evenly stressed and deformed by extrusion, thereby ensuring the sealing of the entire connection part, preventing gas leakage, ensuring that the steam jet pump can normally extract the gas in the reactor, and maintaining the stability of the vacuum degree in the reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of a first process flow of a polydextrose production process provided by an embodiment of the present invention; Figure 2 A second schematic diagram of the polydextrose production process provided by an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a polydextrose production device provided in an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a steam jet pump for a polydextrose production device provided in an embodiment of the present invention; Figure 5 A schematic cross-sectional view of a steam jet pump of a polydextrose production device provided in an embodiment of the present invention; Figure 6 A schematic diagram of the structure of a clamping cylinder of a polydextrose production device provided in an embodiment of the present invention; Figure 7 A schematic diagram of a partial installation of a polydextrose production device provided in an embodiment of the present invention.

[0019] The numbers in the figure represent: 1. Reactor; 2. Steam jet pump; 3. Double steel belt flaker; 4. Buffer tank; 5. Quick-connect assembly; 51. Clamping cylinder; 52. First mounting claw; 53. Fixing cylinder; 54. Second mounting claw; 55. Sealing gasket; 56. First guide block; 57. Second guide block. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The present invention will be further described below in conjunction with the embodiments.

[0022] Example 1, reference Figure 1 and Figure 2 , as the first embodiment of the present invention, provides a polydextrose production process, comprising the following steps: S100, raw materials include glucose 73%-94.9%, citric acid 0.1%-7%, sorbitol 5%-20%; glucose, citric acid and sorbitol are uniformly mixed.

[0023] S200, raw materials are put into the reactor 1, and the raw materials are heated to 50°C-200°C under a vacuum condition of -0.06~-0.1MPa, and the reaction time is controlled to be 4-8 hours. A steam jet pump 2 is used to maintain the vacuum degree in the reactor 1, and the reaction temperature is further lowered and the generation of by-products is reduced to promote and maintain the polymerization reaction. At the same time, the polymerization degree of the material is monitored in real time by the built-in online spectrometer in the reactor 1.

[0024] S300, adopts the double-cooling double-steel belt flaker 3 with upper and lower circulation, uses the combination of cold air and cold water to double-cool the steel belt, cools the molten polydextrose, and solidifies it into uniform flakes.

[0025] S400, the cooled and solidified flake polydextrose is crushed by a crusher to form a powder with uniform particle size.

[0026] Specifically, in the prior art, the cooling method for the material after the polymerization reaction is relatively simple, usually only using a single cooling medium or a simple cooling structure, which is difficult to meet the demand for quickly reducing the temperature of the molten material.

[0027] The double steel belt flaker 3 is composed of two parallel and circulating steel belts, an upper cooling assembly and a lower cooling assembly. The steel belts are respectively an upper steel belt and a lower steel belt. The two steel belts are supported and circulated by multiple transmission rollers. The transmission rollers are driven by motors to ensure that the steel belts are stable and run synchronously. A certain distance is maintained between the upper steel belt and the lower steel belt. At the starting end of the double steel belt, a material feed port is provided (the material feed port is connected to the discharge port of the reactor 1).

[0028] Upper cooling assembly: A primary cooling box and a secondary cooling box are arranged in sequence above the upper steel belt. The cooling surface of the primary cooling box is made of high thermal conductivity copper material, which fits tightly to the surface of the steel belt. The interior of the primary cooling box is connected to the cold air source through a pipe, and low-temperature cold air of -5℃ to -15℃ can be introduced to perform initial rapid cooling of the material on the surface of the steel belt. The secondary cooling box is located above the primary cooling box, and circulating cold water is introduced into the interior. The cold water temperature is maintained at 0℃-5℃. The primary cooling box is pre-cooled through heat conduction to improve the overall cooling efficiency; a buffer cooling cover is installed between the two cooling boxes. The material of the buffer cooling cover is a heat-insulating material with low thermal conductivity, such as a polyurethane foam board, which can effectively reduce heat loss and make the cooling process more stable.

[0029] Lower cooling assembly: A primary cooling box and a secondary cooling box are also set under the lower steel belt, and the structure and working principle are the same as those of the upper cooling assembly. The upper and lower cooling assemblies cooperate with each other to cool the material from both the upper and lower directions at the same time, achieving a double cooling effect of upper and lower circulation.

[0030] Working principle: The molten polydextrose material enters from the feed port and is evenly distributed between the upper and lower steel belts, forming a material layer of a certain thickness. As the steel belt moves forward driven by the drive motor, the material begins to enter the cooling area; at this time, the low-temperature cold air in the primary cooling box of the upper cooling component and the low-temperature cold air in the primary cooling box of the lower cooling component act on the upper and lower surfaces of the material at the same time, using the low-temperature characteristics of the cold air to quickly take away the heat of the material, causing the material temperature to drop rapidly and begin preliminary solidification; while the material continues to move forward with the steel belt, the circulating cold water in the secondary cooling box of the upper cooling component pre-cools the primary cooling box, enhances the cooling capacity of the primary cooling box, and further reduces the surface temperature of the steel belt, thereby cooling the material more deeply. Similarly, the secondary cooling box of the lower cooling component also plays the same role, continuously cooling the material from both the upper and lower directions, accelerating the solidification process of the material, and ensuring that the material can be completely solidified into sheets in a short time.

[0031] Specifically, the reactor 1, the steam jet pump 2 and the double steel belt flake machine 3 are all connected to the PLC controller; the PLC controller system includes an automatic weighing and batching system for the reactor 1, which realizes the refinement and efficiency of the production process; and the PLC controller system integrates the output data of the online spectrometer, intelligently and automatically controls the termination of the reaction, can realize the production requirements of different polyglucose concentrations, realize the requirements of compounding polyglucose and raw glucose, improve production efficiency, have a high degree of automation, and meet the needs of modern industrialized production; during the entire cooling process of the double steel belt flake machine 3, the PLC controller system adjusts the cooling parameters in real time according to the actual situation. For example, when the material temperature is too high, the system automatically increases the flow of cold air and cold water; if the running speed of the steel belt is unstable, the system will adjust the drive motor in time to ensure that the steel belt runs at a uniform speed. After the cooled and solidified flake polyglucose reaches the discharge port, it is transported to the subsequent processing link. Through this double cooling method of up and down circulation, not only the cooling efficiency is improved, but also the uniformity of material cooling is guaranteed to meet the needs of industrialized production.

[0032] Example 2, reference Figure 1 and Figure 2 , which is the second embodiment of the present invention, provides a polydextrose production process suitable for the production of low-concentration polydextrose, comprising the following steps: S100, raw material preparation: set the raw material ratio to 80% glucose concentration, 5% citric acid catalyst concentration, and 15% sorbitol, and automatically add and mix to the set weight.

[0033] S200, heating reaction: The reactor 1 was heated to 100°C at -0.06 MPa and maintained at this temperature for 8 hours. During the reaction, the online spectrometer detected the polymerization concentration in real time. When the concentration reached the target value (polymerization concentration was 76%), the stop light prompted and the heating was automatically stopped, and the material was discharged after rapid decompression.

[0034] S300, cooling and solidification: The molten material flows evenly into the double steel belt flaker 3 with double cooling in upper and lower circulation through the discharge port. The air temperature of the first cooling box is set to -5°C, and the cold water temperature of the second cooling box is 5°C. The material is cooled and solidified on the steel belt to form flake polydextrose. The cooling time is 60 seconds.

[0035] S400, pulverizing: the cooled polydextrose sheet is pulverized by a pulverizer.

[0036] Example 3, reference Figure 1 and Figure 2 , which is the third embodiment of the present invention, provides a polydextrose production process suitable for the production of medium-concentration polydextrose, comprising the following steps: S100, raw material preparation: set the raw material ratio to 73% glucose concentration, 7% citric acid catalyst concentration, and 20% sorbitol, and automatically add and mix to the set weight.

[0037] S200, heating reaction: the reactor 1 was heated to 160°C at -0.08 MPa and maintained at this temperature for 4 hours. During the reaction, the online spectrometer detected the polymerization concentration in real time. When the concentration reached the target value (polymerization concentration was 88%), the stop light prompted and the heating was automatically stopped, and the material was discharged after rapid decompression.

[0038] S300, cooling and solidification: The molten material flows evenly into the double steel belt flaker 3 with double cooling in upper and lower circulation through the discharge port. The air temperature of the first cooling box is set to -10℃, and the cold water temperature of the second cooling box is 0℃. The material is cooled and solidified on the steel belt to form flake polydextrose. The cooling time is 120 seconds.

[0039] S400, pulverizing: the cooled polydextrose sheet is pulverized by a pulverizer.

[0040] Example 4, reference Figure 1 , which is the fourth embodiment of the present invention, provides a polydextrose production process suitable for the production of high-concentration polydextrose, comprising the following steps: S100, raw material preparation: set the raw material ratio glucose concentration to 90%, citric acid catalyst concentration to 1%, sorbitol to 9%, and automatically add and mix to the set weight.

[0041] S200, heating reaction: the reactor 1 is heated to 180°C at -0.09 MPa and maintained at this temperature for 5 hours. During the reaction, the online spectrometer detects the polymerization concentration in real time. When the concentration reaches the target value (polymerization concentration is 96%), the stop light prompts and the heating is automatically stopped, and the material is discharged after rapid decompression.

[0042] S300, cooling and solidification: The molten material flows evenly into the double steel belt flaker 3 with double cooling in upper and lower cycles through the discharge port. The air temperature of the first cooling box is set to -15°C, and the cold water temperature of the second cooling box is 2°C. The material is cooled and solidified on the steel belt to form flake polydextrose. The cooling time is 90 seconds.

[0043] S400, pulverizing: the cooled polydextrose sheet is pulverized by a pulverizer.

[0044] Example 5, reference Figure 1-Figure 7, which is the fifth embodiment of the present invention, provides a polydextrose production device, including a reactor 1, and a steam jet pump 2 arranged on one side of the reactor 1, a buffer tank 4 is arranged between the reactor 1 and the steam jet pump 2, the air inlet of the buffer tank 4 is connected to the air outlet of the reactor 1 through a pipeline, and the air outlet of the buffer tank 4 is connected to the air inlet of the steam jet pump 2 through a quick-connect assembly 5.

[0045] Specifically, the body of the buffer tank 4 is preferably cylindrical and made of corrosion-resistant materials such as stainless steel. The cylindrical design can evenly disperse the internal pressure and ensure the strength and stability of the tank. The buffer tank 4 is provided with multiple interfaces, including an air inlet connected to the reactor 1, an air outlet connected to the steam jet pump 2, and an interface for installing monitoring equipment such as a vacuum gauge; the diameters of the air inlet and the air outlet are designed according to the air extraction flow and pressure requirements of the steam jet pump 2 and the reactor 1 to ensure smooth gas in and out; the monitoring equipment interface is used to monitor the vacuum degree in the buffer tank 4 in real time and provide data to the operator so as to adjust the working state of the steam jet pump 2 in time.

[0046] Specifically, when the steam jet pump 2 is working to extract the gas in the reactor 1, the gas first enters the buffer tank 4. Since the gas is compressible, the gas pressure is buffered and balanced in the larger space of the buffer tank 4. When the steam jet pump 2 is working and pressure fluctuations occur, such as when the suction capacity changes instantly, the gas stored in the buffer tank 4 can play a supplementary or buffering role; if the suction capacity of the steam jet pump 2 suddenly increases, the gas in the buffer tank 4 can be replenished in time to avoid a sharp drop in the vacuum degree in the reactor 1; if the suction capacity decreases, the buffer tank 4 can temporarily store excess gas to prevent the pressure in the reactor 1 from rising instantly, maintain the relative stability of the vacuum degree in the reactor 1, and provide a stable environment for the polymerization reaction.

[0047] Reference Figure 6 and Figure 7 The quick-connect assembly 5 includes a clamping cylinder 51 rotatably mounted on the inner side of the air inlet of the steam jet pump 2 through a dynamic seal, and a first mounting claw 52 is symmetrically welded on the outer wall of the clamping cylinder 51, and a fixed cylinder 53 is fixedly mounted or welded on the air outlet of the buffer tank 4, and a second mounting claw 54 is symmetrically welded on the outer wall of the fixed cylinder 53; sealing gaskets 55 are fixedly mounted at the openings of the clamping cylinder 51 and the fixed cylinder 53, and the sealing gasket 55 is made of rubber and has deformation ability; the second mounting claw 54 and the first mounting claw 52 are both "C" shaped as a whole, and the second mounting claw 54 and the first mounting claw 52 are arranged opposite to each other.

[0048] Specifically, the dynamic seal is a component that prevents fluid leakage by at least one pair of end faces perpendicular to the rotation axis, which are kept in contact and slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism and the cooperation of the auxiliary seal. It can be composed of static rings, dynamic rings, springs, sealing rings and other components. At the air inlet of the steam jet pump 2, the dynamic ring of the dynamic seal rotates with the clamping tube 51, and the static ring is fixed. The dynamic ring and the static ring are closely fitted to achieve sealing, which can adapt to higher pressures and temperatures, has a relatively long service life, and is suitable for equipment such as the steam jet pump 2 that has high requirements for sealing.

[0049] Specifically, the surface of the clamping tube 51 is provided with a toggle pattern (such as Figure 6 as shown).

[0050] Specifically, when the steam jet pump 2 and the buffer tank 4 need to be installed, the steam jet pump 2 is pushed so that its air inlet is close to the air outlet of the buffer tank 4, so that the end faces of the two sealing gaskets 55 are fitted together, and then the operator can rotate the clamping tube 51 through the toggle pattern on the surface of the clamping tube 51, so that the distance between the first mounting claw 52 and the second mounting claw 54 is continuously approached, and as the first mounting claw 52 is completely pressed against the second mounting claw 54, a quick connection is completed between the steam jet pump 2 and the buffer tank 4, and during the clamping process, the rubber sealing gasket 55 will undergo a certain deformation, and this deformation enables the sealing gasket 55 to better fill the gap between the clamping tube 51 and the fixed tube 53, thereby enhancing the sealing effect.

[0051] Reference Figure 6 and Figure 7 A first guide block 56 is integrally formed and connected to the outer wall of the clamping cylinder 51, and the first guide block 56 includes a first arc segment and a first parallel segment connected to one side of the first arc segment, and the first parallel segment is located on the inner side of the first mounting claw 52; a second guide block 57 is integrally formed and connected to the outer wall of the fixing cylinder 53, and the second guide block 57 includes a second arc segment and a second parallel segment connected to one side of the second arc segment, and the second parallel segment is located on the inner side of the second mounting claw 54.

[0052] Specifically, the first arc segment of the first guide block 56 and the second arc segment of the second guide block 57 are similar to two guiding rails that cooperate with each other; when the steam jet pump 2 completes approaching the buffer tank 4, the first arc segment and the second arc segment can guide the clamping tube 51 and the fixed tube 53 to be accurately centered, so that the operator can more easily align the clamping tube 51 with the fixed tube 53 during installation, thereby reducing possible deviations during the installation process, greatly improving the convenience and accuracy of installation, and during the rotation process, the sealing gasket 55 can be evenly stressed and deformed by extrusion, thereby enhancing the sealing performance of the sealing gasket 55, ensuring the sealing of the entire connection part, preventing gas leakage, and ensuring that the steam jet pump 2 can normally extract the gas in the reactor 1 and maintain the stable vacuum degree in the reactor 1.

[0053] Specifically, when the first mounting claw 52 rotates to the second parallel section (the second mounting claw 54 is also on the first parallel section), as the clamping tube 51 continues to rotate, the second parallel section and the first parallel section can limit the relative positions of the first mounting claw 52 and the second mounting claw 54, thereby preventing the relative displacement of the first mounting claw 52 and the second mounting claw 54 or the degradation of the sealing performance of the sealing gasket 55 due to pressure changes.

[0054] In summary, the working principle of the polydextrose production device is: When the polydextrose polymerization reaction is carried out in the reactor 1, the steam jet pump 2 is responsible for extracting the gas in the reactor 1 to maintain the vacuum environment required for the polymerization reaction. When the exhaust capacity of the steam jet pump 2 fluctuates, the gas in the buffer tank 4 can be replenished or stored in time to maintain the vacuum degree in the reactor 1 stable. The steam jet pump 2 is connected to the buffer tank 4 through the quick-connect assembly 5. During installation, the steam jet pump 2 is pushed so that the air inlet is close to the air outlet of the buffer tank 4, and the two sealing gaskets 55 fit together. The operator turns the toggle pattern on the clamping tube 51 to clamp the first mounting claw 52 and the second mounting claw 54 close to each other to achieve a quick connection. During the clamping process, the rubber sealing gasket 55 is deformed to enhance the sealing effect and ensure the sealing performance and connection stability.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A polydextrose production process, characterized in that: The following steps are involved: S100, raw materials include glucose 73%-94.9%, citric acid 0.1%-7%, sorbitol 5%-20%; mixed glucose, citric acid and sorbitol; S200, heating the raw materials to 50°C to 200°C in a reaction kettle (1) under a vacuum condition of -0.06 to -0.1 MPa, controlling the reaction time to be 4 to 8 hours, and using a steam jet pump (2) to maintain the vacuum degree in the reaction kettle (1); S300, cooling the molten polydextrose and solidifying it into a uniform sheet; S400, crushing the cooled polydextrose tablets.

2. The polydextrose production process according to claim 1, characterized in that: In S200, the polymerization degree of the material is monitored in real time by an online spectrometer built into the reactor (1).

3. The polydextrose production process according to claim 2, characterized in that: In the S300, a double steel belt flaker (3) with double cooling and upper and lower circulation is adopted, and the steel belt is double cooled by combining cold air and cold water.

4. The polydextrose production process according to claim 3, characterized in that: The reaction kettle (1), the steam jet pump (2) and the double steel belt flaker (3) are all connected to a PLC controller.

5. A polydextrose production device, based on the polydextrose production process according to any one of claims 1 to 4, comprising a reactor (1), and a steam jet pump (2) arranged on one side of the reactor (1), characterized in that: A buffer tank (4) is provided between the reactor (1) and the steam jet pump (2); an air inlet of the buffer tank (4) is connected to an air outlet of the reactor (1) via a pipeline; and an air outlet of the buffer tank (4) is connected to an air inlet of the steam jet pump (2) via a quick-connect assembly (5).

6. The polydextrose production device according to claim 5, characterized in that: The quick-connect assembly (5) comprises a clamping cylinder (51) arranged on the inner side of the air inlet of the steam jet pump (2) via a dynamic seal, and a first mounting claw (52) is symmetrically arranged on the outer wall of the clamping cylinder (51); the air outlet of the buffer tank (4) is provided with a fixing cylinder (53), and a second mounting claw (54) is symmetrically arranged on the outer wall of the fixing cylinder (53); Sealing gaskets (55) are provided at the openings of the clamping cylinder (51) and the fixing cylinder (53).

7. The polydextrose production device according to claim 6, characterized in that: The second mounting claw (54) and the first mounting claw (52) are both in a "C" shape as a whole, and the second mounting claw (54) and the first mounting claw (52) are arranged opposite to each other.

8. The polydextrose production device according to claim 6, characterized in that: A first guide block (56) is integrally formed on the outer wall of the clamping cylinder (51), the first guide block (56) comprising a first arc segment and a first parallel segment connected to one side of the first arc segment, and the first parallel segment is located on the inner side of the first mounting claw (52).

9. The polydextrose production device according to claim 6, characterized in that: A second guide block (57) is integrally formed on the outer wall of the fixing cylinder (53), the second guide block (57) comprising a second arc segment and a second parallel segment connected to one side of the second arc segment, and the second parallel segment is located on the inner side of the second mounting claw (54).

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