A wet heat treatment apparatus for processing low GI brown rice

Abstract

The utility model provides a kind of wet heat treatment equipment of processing low GI brown rice, it is related to brown rice processing field, including microwave processing box (10) and wet heat treatment box (20), microwave processing box (10) is arranged with upper conveying assembly (11), lower conveying assembly (12) and microwave generator (13), microwave processing box (10) and wet heat treatment box (20) are communicated by hopper (21) between, wet heat treatment box (20) is arranged with conveying assembly (22), support plate (23), two pieces of side baffle (24), movable baffle groove (25) and steam nozzle (26).The equipment is treated by the mode of microwave and high-temperature steaming, not only improve the content of anti-digestion starch in brown rice, but also realize the efficient wet heat treatment of brown rice, avoid bran and other problems such as broken rice caused by vibration or stirring to separate.

Description

Technical Field

[0001] This utility model relates to the field of brown rice processing technology, specifically to a wet heat treatment device for processing low-GI brown rice. Background Technology

[0002] Brown rice, also known as whole-grain rice, retains the bran, aleurone layer, and germ after the rice grains have been hulled. Compared to refined white rice, it retains approximately 80% of the nutrients found in rice and is hailed as "nutritional gold." Brown rice offers benefits such as metabolic regulation (its glycemic index (GI) of 55-68 is significantly lower than that of refined rice (GI of 73-89), cardiovascular protection, promotion of gut health, and anti-aging and cancer prevention. However, brown rice contains anti-nutritional factors such as phytic acid, tannins, and non-starch polysaccharides, which can inhibit the absorption of minerals like calcium, iron, and zinc, as well as protein. Therefore, moist heat treatment is often necessary to reduce these anti-nutritional factors and improve nutrient bioavailability. Furthermore, moist heat treatment also enriches the functional components of brown rice (such as GABA), improves its texture and taste, enhances digestibility and absorption, and extends storage stability. Existing wet heat treatment equipment, such as the efficient wet heat treatment device for agricultural and sideline products disclosed in Chinese patent document CN216620533U, can improve the efficiency of wet heat treatment of dried agricultural and sideline products placed inside by stirring and vibration. However, because brown rice retains the bran, endosperm, and germ, the intense friction generated by the combined action of vibration and stirring can easily cause the bran and other parts of the brown rice to detach from the main body of the brown rice, or even cause the brown rice to break. This not only leads to a significant loss of nutrients in brown rice (a large reduction in dietary fiber, loss of B vitamins and vitamin E, lower mineral content, and loss of functional components), but also affects the taste of brown rice. In addition, it can also cause an increase in the glycemic index (GI) of brown rice, which is not conducive to blood sugar control. Utility Model Content

[0003] To address the problems existing in the prior art, the purpose of this utility model is to provide a wet heat treatment device for processing low-GI brown rice. This device uses microwave and high-temperature steam treatment to not only increase the content of resistant starch in brown rice, but also to achieve efficient wet heat treatment of brown rice, avoid problems such as bran separation and broken rice caused by vibration or stirring, and improve the strength of rice grains.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A wet heat treatment device for processing low-GI brown rice includes a microwave treatment chamber and a wet heat treatment chamber. The microwave treatment chamber contains an upper conveyor assembly, a lower conveyor assembly, and a microwave generator. The conveyor belt of the upper conveyor assembly has an isosceles trapezoidal structure, and the microwave generator is located inside the conveyor belt of the upper conveyor assembly. The end face of the conveyor belt of the lower conveyor assembly is parallel to the bottom edge of the conveyor belt of the upper conveyor assembly, with a gap between them. The microwave treatment chamber and the wet heat treatment chamber are connected by a hopper. The wet heat treatment chamber contains a conveying assembly, a support plate, two side baffles, a movable baffle, and steam nozzles. The conveying assembly is located inside the wet heat treatment chamber. The support plate is located at the bottom of the upper conveyor belt of the conveying assembly, and side baffles are respectively installed on the front and rear end faces of the support plate on the conveyor belt of the conveying assembly. The movable baffle has an inverted "U"-shaped structure and slides on the outer wall of the two side baffles. Microholes are evenly distributed on the side baffles and the movable baffle. Steam nozzles are evenly distributed on the upper side of the movable baffle along the direction of the conveying assembly.

[0006] Based on further optimization of the above scheme, the upper conveying assembly includes four sets of conveying rollers and a conveyor belt. Two sets of conveying rollers are respectively arranged on the upper and lower sides of the microwave processing box cavity, and the central axes of the two sets of conveying rollers at the same height are located on the same horizontal plane. The center distance between the two sets of conveying rollers on the lower side is greater than the center distance between the two sets of conveying rollers on the upper side. The conveyor belt is wrapped around the outer ring of the four sets of conveying rollers, and the conveyor belt is made of microwave transparent material of polytetrafluoroethylene or polypropylene.

[0007] Based on further optimization of the above scheme, both the lower conveying component and the conveying component include two sets of conveying rollers and conveyor belts. The central axes of the two sets of conveying rollers are located on the same horizontal plane, and the conveyor belts are respectively wound around the outer rings of the two sets of conveying rollers.

[0008] Based on further optimization of the above scheme, an L-shaped feed pipe is provided on the side of the microwave processing box away from the wet heat treatment box. One end of the L-shaped feed pipe contacts the end face of the conveyor belt of the lower conveying component, and the other end penetrates through the corresponding side wall of the microwave processing box.

[0009] Based on further optimization of the above scheme, the hopper has a structure in which the height gradually decreases from the microwave processing box to the humid heat treatment box, and the end of the hopper located in the inner cavity of the microwave processing box is respectively attached to the outer wall of the transmission belt of the upper conveying component and the conveyor belt of the lower conveying component. The two sides of the end of the hopper located in the inner cavity of the humid heat treatment box are respectively connected to the side wall of the corresponding side baffle.

[0010] Based on further optimization of the above scheme, the front and rear ends of the support plate are fixedly connected to the corresponding inner walls of the damp heat treatment box; the length of the side baffle is greater than the length of the support plate.

[0011] Based on further optimization of the above scheme, exhaust ports are respectively provided on the front and rear side walls of the damp heat treatment box located under the support plate, and filter screens are provided at the exhaust ports.

[0012] The following are the technical effects of this utility model:

[0013] This application, through the arrangement of upper and lower conveyor components, not only improves the transmission efficiency of brown rice through two sets of conveyor components, but also uses the conveyor belt of the upper conveyor component to form fibers in the brown rice, avoiding the problem of brown rice jumping and splashing randomly caused by microwaves. It also provides a placement location for the microwave generator and makes reasonable use of the overall space of the microwave processing box. Through the arrangement of the conveyor components, support plate, two side baffles, and movable baffles, the following are achieved: first, the transmission of brown rice in the humid heat treatment box is realized; second, high-temperature steam is effectively sprayed between the brown rice grains and efficiently dissipated; and third, the brown rice is limited during transmission, avoiding splashing and severe friction between the grains during high-temperature steam treatment, thus ensuring the effectiveness of the high-temperature steam treatment. Microwave and high-temperature processing not only promotes the formation of complexes between ferulic acid and starch, increasing the content of resistant starch in rice, but also effectively kills microorganisms and insect eggs in brown rice, destroys the activity of biological enzymes such as lipase in germ, and improves the storage stability of germ rice. In addition, it can also partially gelatinize starch, improve the strength of rice grains, and avoid problems such as broken rice, bran, and germ falling off during the processing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the wet heat treatment equipment in the embodiment of this utility model.

[0015] Figure 2 for Figure 1 A sectional view along line AA.

[0016] Figure 3 This is a schematic diagram of the movable baffle structure of the wet heat treatment equipment in this embodiment of the present invention.

[0017] Among them, 10. Microwave processing box; 11. Upper conveyor assembly; 12. Lower conveyor assembly; 13. Microwave generator; 14. Support platform; 15. L-shaped feed pipe; 20. Wet heat treatment box; 21. Feed hopper; 22. Conveying assembly; 23. Support plate; 24. Side baffle; 25. Movable baffle groove; 26. Steam nozzle; 27. Filter screen. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Example 1:

[0020] A wet heat treatment device for processing low-GI brown rice includes a microwave treatment chamber 10 and a wet heat treatment chamber 20. The microwave treatment chamber 10 is equipped with an upper conveyor assembly 11, a lower conveyor assembly 12, and a microwave generator 13. The conveyor belt of the upper conveyor assembly 11 has an isosceles trapezoidal structure. Figure 1 As shown: The upper conveyor assembly 11 includes four sets of conveyor rollers and a conveyor belt. Two sets of conveyor rollers are respectively installed on the upper and lower sides of the microwave processing box 10, and the central axes of the two sets of conveyor rollers at the same height are located on the same horizontal plane. The center distance between the two sets of conveyor rollers on the lower side is greater than the center distance between the two sets of conveyor rollers on the upper side (i.e., the base of the isosceles trapezoidal structure is longer than the top side). The conveyor belt is wound around the outer ring of the four sets of conveyor rollers, and the conveyor belt is made of microwave-transparent material such as polytetrafluoroethylene or polypropylene (to avoid the conveyor belt obstructing microwave transmission). The microwave generator 13 is located inside the conveyor belt of the upper conveyor assembly 11 (e.g., ...). Figure 1 As shown, specifically, it is located on the upper side of the bottom edge of the upper conveyor assembly 11. The end face of the conveyor belt of the lower conveyor assembly 12 is parallel to the bottom edge of the conveyor belt of the upper conveyor assembly 11 and there is a gap; that is, the lower conveyor assembly 12 includes two sets of conveyor rollers and conveyor belts, the central axes of the two sets of conveyor rollers are located on the same horizontal plane and the conveyor belts are respectively wound around the outer rings of the two sets of conveyor rollers (e.g., Figure 1 As shown), a support platform 14 is provided between the conveyor belt of the lower conveyor assembly 12 and the two sets of conveyor rollers. The support platform 14 is as follows: Figure 1 The front and rear sides shown are fixedly connected to the inner walls of the corresponding microwave processing box 10, forming a support for the conveying of brown rice and preventing the conveyor belt from oscillating due to microwave action, which in turn causes the brown rice to oscillate. An L-shaped feed pipe 15 is provided on the side of the microwave processing box 10 away from the wet heat treatment box 20. One end of the L-shaped feed pipe 15 contacts the end face of the conveyor belt of the lower conveying assembly 12, and the other end passes through the corresponding side wall of the microwave processing box 10. At the same time, in order to ensure feeding efficiency, a feed funnel with a larger top and a smaller bottom is provided at the end of the L-shaped feed pipe 15 located on the outside of the microwave processing box 10.

[0021] The microwave processing chamber 10 and the damp heat treatment chamber 20 are connected by a feeding hopper 21, which has a structure in which the height of the feeding hopper 21 gradually decreases from the microwave processing chamber 10 to the damp heat treatment chamber 20 (e.g., Figure 1 (As shown). The damp heat treatment chamber 20 is equipped with a conveying assembly 22, a support plate 23, two side baffles 24, a movable baffle 25, and a steam nozzle 26. The conveying assembly 22 is located within the damp heat treatment chamber 20 and includes two sets of conveying rollers and a conveyor belt. The central axes of the two sets of conveying rollers are on the same horizontal plane, and the conveyor belt is wound around the outer ring of each set of conveying rollers. The discharge hopper 21 is located at the end of the microwave treatment chamber 10's inner cavity and is respectively attached to the outer wall of the upper conveying assembly 11's transmission belt and the lower conveying assembly 12's conveyor belt. The discharge hopper 21 is located at the end of the damp heat treatment chamber 20's inner cavity (as shown). Figure 1The front and rear sides (as shown) are respectively connected to the side walls of the corresponding side baffles 24. The support plate 23 is set at the bottom of the upper conveyor belt of the conveying assembly 22 (e.g., Figure 1 (As shown) and the support plate 23 is located on the front and rear end faces of the conveyor belt of the conveyor assembly 22, respectively, with side baffles 24 (as shown). Figure 2 As shown, the side baffles 24 are located on the left and right sides of the conveyor belt of the conveyor assembly 22; the front and rear ends of the support plate 23 are fixedly connected to the corresponding inner walls of the wet heat treatment box 20; the length of the side baffles is greater than the length of the support plate. The width of the support plate 23 is greater than the width of the conveyor belt of the conveyor assembly 22), and the movable baffle 25 is an inverted "U" shaped structure (combined with...). Figure 2 and Figure 3 (As shown) and it is slidably disposed on the outer wall of the two side baffles 24 (that is, the inner walls of the two sides of the movable baffle 25 are respectively slidably connected to the outer wall of the corresponding side baffle 24), and microholes are evenly opened on the side baffles 24 and the movable baffle 25 (such as Figure 1 , Figure 2 , Figure 3 As shown), steam nozzles 26 are evenly arranged on the upper side of the movable baffle 25 along the direction of the conveying assembly 22; simultaneously, the steam nozzles 26 are connected to the high-temperature steam supply pipes arranged on the top surface of the wet heat treatment box 20, and the steam supply pipes are connected to an external high-temperature steam generating device (the high-temperature steam generating device can be a conventional steam generator in this field, such as: electric heating steam generator, gas steam generator, industrial high-temperature heat pump unit, etc.). The front and rear side walls of the wet heat treatment box 20 located below the support plate 23 (i.e. Figure 2 The left and right side walls shown are respectively equipped with exhaust ports and filter screens 27 are installed at the exhaust ports.

[0022] Working principle:

[0023] In use, first activate the upper conveyor assembly 11, the lower conveyor assembly 12, and the conveyor assembly 22, so that the conveyor belt of the upper conveyor assembly 11... Figure 1 As shown, rotating counterclockwise, the conveyor belts of the lower conveyor assembly 12 and the conveyor assembly 22... Figure 1The process involves rotating clockwise as shown; then, brown rice to be processed is poured in through the L-shaped feed pipe 15, falling onto the end face of the lower conveyor assembly 12 and moving along with it; the microwave generator 13 is activated to achieve microwave processing of the brown rice. Microwaves penetrate the brown rice, and the polar molecules (such as water molecules) in the brown rice vibrate and rotate at high speed under the action of the microwave electric field. The molecules rub and collide with each other, converting microwave energy into heat energy, causing the interior of the brown rice to heat up rapidly; in this process, the thermal and non-thermal effects of microwaves work together to change the activity of enzymes in the brown rice (such as reducing the activity of lipase, while affecting the starch structure and promoting partial starch gelatinization), thereby improving the storage stability and nutritional characteristics of the brown rice. Microwave-treated brown rice falls from hopper 21 into the wet heat treatment chamber 20 and is transported along with the conveying assembly 22. High-temperature steam is introduced into the inner cavity of the wet heat treatment chamber 20 through steam nozzle 26. The high-temperature steam enters the brown rice through the micropores on the top surface of the movable baffle 25, killing microorganisms and insect eggs in the brown rice, destroying the activity of biological enzymes such as lipase in the germ, and gelatinizing starch granules. Finally, it is transported to the wet heat treatment chamber 20. Figure 1 The right side shown (a discharge port can be set on the right side to collect the processed brown rice for the next step, such as drying).

[0024] Example 2:

[0025] As a further optimization of the present invention, based on the solution of embodiment 1, in order to further control the steam temperature, temperature sensors are uniformly arranged on the inner wall of the side baffle 24 to monitor the temperature generated by the high-temperature steam heating the brown rice in real time, and then adjust the steam temperature in real time.

[0026] Example 3:

[0027] As a further optimization of the present invention, based on the solution of embodiment 1, a solenoid valve can be installed at the connection between the steam nozzle 26 and the high-temperature steam supply pipeline to control the flow rate and opening / closing of the high-temperature steam.

[0028] Example 4:

[0029] As a further optimization of the present invention, based on the solution of embodiment 1, a fan assembly (the fan assembly can be a conventional fan structure for exhaust in the art) is provided on the outer wall of the exhaust port of the humid heat treatment box 20 to improve exhaust efficiency.

[0030] Example 5:

[0031] As a further optimization of the present utility model, based on the scheme of embodiment 1, the movable baffle 25 is controlled to rise and fall by screws set on both sides thereon. Specifically, the upper and lower ends of the screws are rotatably connected to the top surface of the inner cavity of the damp heat treatment box 20 and the end face of the support plate 23, respectively. Lugs are provided in the middle of the outer walls on both sides of the movable baffle 25, corresponding to the screws. The screws pass through the corresponding lugs and are threadedly connected (e.g., ...). Figure 2 (As shown); by controlling the lifting of the movable baffle 25, the capacity of the brown rice inside the conveyor belt is controlled, thereby improving the processing efficiency and preventing the brown rice from accumulating in the discharge hopper 21.

Claims

1. A wet heat treatment apparatus for processing low-GI brown rice, characterized in that: The system includes a microwave processing chamber and a damp heat treatment chamber. The microwave processing chamber contains an upper conveyor assembly, a lower conveyor assembly, and a microwave generator. The conveyor belt of the upper conveyor assembly has an isosceles trapezoidal structure, and the microwave generator is located inside the conveyor belt of the upper conveyor assembly. The end face of the conveyor belt of the lower conveyor assembly is parallel to the bottom edge of the conveyor belt of the upper conveyor assembly, with a gap between them. The microwave processing chamber and the damp heat treatment chamber are connected by a hopper. The damp heat treatment chamber contains a conveying assembly, a support plate, two side baffles, a movable baffle, and steam nozzles. The conveying assembly is located inside the damp heat treatment chamber. The support plate is located at the bottom of the upper conveyor belt of the conveying assembly, and side baffles are respectively set on the front and rear end faces of the support plate on the conveyor belt of the conveying assembly. The movable baffle has an inverted "U" shaped structure and is slidably mounted on the outer wall of the two side baffles. Microholes are evenly opened on the side baffles and the movable baffle. Steam nozzles are evenly arranged on the upper side of the movable baffle along the direction of the conveying assembly.

2. The wet heat treatment equipment for processing low-GI brown rice according to claim 1, characterized in that: The upper conveying assembly includes four sets of conveying rollers and a conveyor belt. Two sets of conveying rollers are respectively arranged on the upper and lower sides of the microwave processing box cavity, and the central axes of the two sets of conveying rollers at the same height are located on the same horizontal plane. The center distance between the two sets of conveying rollers on the lower side is greater than the center distance between the two sets of conveying rollers on the upper side. The conveyor belt is wound around the outer ring of the four sets of conveying rollers.

3. The wet heat treatment equipment for processing low-GI brown rice according to claim 1, characterized in that: Both the lower conveying assembly and the conveying assembly include two sets of conveying rollers and a conveyor belt. The central axes of the two sets of conveying rollers are located on the same horizontal plane, and the conveyor belts are respectively wound around the outer rings of the two sets of conveying rollers.

4. The wet heat treatment equipment for processing low-GI brown rice according to claim 1, characterized in that: An L-shaped feed pipe is provided on the side of the microwave processing box away from the humid heat treatment box. One end of the L-shaped feed pipe contacts the end face of the conveyor belt of the lower conveying assembly, and the other end passes through the corresponding side wall of the microwave processing box.

5. The wet heat treatment equipment for processing low-GI brown rice according to claim 1, characterized in that: The hopper has a structure in which the height gradually decreases from the microwave processing box to the humid heat treatment box. The end of the hopper located in the inner cavity of the microwave processing box is respectively attached to the outer wall of the transmission belt of the upper conveying component and the conveyor belt of the lower conveying component. The two sides of the end of the hopper located in the inner cavity of the humid heat treatment box are respectively connected to the side wall of the corresponding side baffle.

6. The wet heat treatment equipment for processing low-GI brown rice according to claim 1, characterized in that: The front and rear ends of the support plate are fixedly connected to the corresponding inner walls of the wet heat treatment box; the length of the side baffle is greater than the length of the support plate.

7. The wet heat treatment equipment for processing low-GI brown rice according to claim 1, characterized in that: The damp heat treatment box has exhaust ports on the front and rear side walls located under the support plate, and filter screens are installed at the exhaust ports.

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