Comprehensive utilization system for extracting black rice anthocyanin and separating starch

Abstract

A comprehensive utilization system for extracting black rice anthocyanin and separating starch is provided with a screw conveyor, an extraction tank is arranged at an outlet of the screw conveyor, stirring blades are arranged in the extraction tank, a liquid outlet pipe is arranged on one side of the extraction tank and connected with a liquid outlet pump through a valve, and the liquid outlet pump is connected with the extraction tank and a liquid storage tank through pipelines. A slag outlet in the bottom of the extraction tank is connected with a screw pump through a pipeline and a valve, an outlet of the screw pump is provided with a pulping machine, an outlet of the pulping machine is provided with a vibrating screen, a filtrate outlet of the vibrating screen is provided with a filtrate collecting tank, the filtrate collecting tank is connected with a horizontal screw centrifuge through a horizontal screw feeding pump, and a slag outlet of the horizontal screw centrifuge is provided with a horizontal screw slag collecting tank; according to the utility model, the extraction of black rice anthocyanin is realized through the extraction tank, starch in black rice is separated and collected by the horizontal screw centrifuge, compared with natural sedimentation, the occupied area is small, the treatment capacity is large, the efficiency is high, the obtained starch has low water content and high quality, and the extraction of black rice anthocyanin and the recycling of starch are realized.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment technology, specifically a comprehensive utilization system for extracting anthocyanins from black rice and separating starch. Background Technology

[0002] Black rice, named for its black and purple color due to the thick deposition of anthocyanins in its pericarp, is rich in anthocyanins (approximately 1% of the total weight of black rice), a content far exceeding that of other ingredients such as blueberries and purple sweet potatoes. Anthocyanins are among the most effective antioxidants and free radical scavengers discovered to date. In food, anthocyanins serve not only as a nutritional fortifier but also as a food preservative and coloring agent in everyday beverages and foods, meeting the general demand for natural, safe, and healthy food additives. Therefore, the market demand for anthocyanins from black rice is increasing year by year. Furthermore, the endosperm of black rice contains a large amount of starch (approximately 70-85% of the total weight of black rice), making it an important source of starch.

[0003] Currently, black rice anthocyanin is extracted through manual feeding, residue removal, and a single soaking in cold water. This process is cumbersome, yields low output, and has a small daily processing capacity. The extracted rice residue is either used as animal feed or discarded, failing to fully utilize the abundant starch and other nutrients within it. Furthermore, the waste has a certain color, impacting the environment. Conventional starch separation methods rely on natural sedimentation in settling tanks without sophisticated filtration equipment, resulting in low efficiency, increased equipment footprint, and high impurity and moisture content in the extracted starch. Therefore, developing a comprehensive utilization system for extracting black rice anthocyanins and starch is of great significance. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of cumbersome operation, low yield, small daily processing capacity, and inefficient utilization of the large amount of starch in rice residue when extracting anthocyanins from black rice. This invention provides a comprehensive utilization system for extracting anthocyanins from black rice and separating starch from rice residue. This invention can be used to extract anthocyanins from black rice and starch from rice residue, increasing product added value while reducing waste emissions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a comprehensive utilization system for extracting anthocyanins and separating starch from black rice. It includes a screw conveyor with an extraction tank at its outlet. The extraction tank contains stirring blades, and a liquid outlet pipe is located on one side of the extraction tank. The liquid outlet pipe is connected to a liquid outlet pump via a valve. The liquid outlet pump is connected to both the extraction tank and a storage tank via pipes. A screw pump is connected to the slag outlet at the bottom of the extraction tank via pipes and valves. A grinding mill is located at the outlet of the screw pump, and a vibrating screen is located at the outlet of the grinding mill. A filtrate collection tank is located at the filtrate outlet of the vibrating screen. The filtrate collection tank is connected to a horizontal screw centrifuge via a horizontal screw feed pump, and a horizontal screw slag collection tank is located at the slag discharge port of the horizontal screw centrifuge.

[0007] Preferably, the outer wall of the extraction tank of this invention is provided with a heating jacket, which can heat the material inside the extraction tank with steam.

[0008] Preferably, the vibrating screen of this invention is equipped with a 100-mesh stainless steel filter screen, which can trap large particles of fiber, rice bran and other impurities, thereby obtaining a fine starch slurry.

[0009] Preferably, a stainless steel filter screen is also installed at the outlet pipe of this utility model, which can be used for external circulation of the extract or for discharging the extract.

[0010] Preferably, the screw pump of this invention is controlled by a variable frequency motor, which can uniformly and stably transport rice residue and water to subsequent processes.

[0011] Preferably, the extraction tank of this invention has several stirring blades arranged from top to bottom inside, so as to mix the precipitate and liquid in the extraction tank evenly.

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] (1) The extraction tank of this utility model uses a screw conveyor to feed black rice raw materials on the ground. Compared with the lifting machine and manual feeding, it is safe, efficient and convenient. The side wall of the extraction tank is equipped with a jacket, which can be used to heat and extract the material in the tank by passing steam. There is a stirring motor in the center of the tank that drives multiple stirring blades. During extraction or slag discharge, the raw materials and liquid can be mixed evenly, resulting in higher extraction efficiency. The side wall of the extraction tank is equipped with a liquid outlet pipe with a stainless steel filter screen, which can perform rapid solid-liquid separation, thereby circulating the extract or discharging the extract. After the liquid is discharged once, the solvent can be repeatedly injected for multiple extractions, resulting in more anthocyanins extracted. The bottom of the extraction tank is connected to a screw pump. The screw pump motor is controlled by a frequency converter, which can simultaneously and evenly and stably transport rice residue and water to the grinder for direct grinding, avoiding the need to transport rice residue separately by a conveyor belt and then add water in the grinding process.

[0014] (2) The grinding section of this utility model is a combination of a grinding machine and a vibrating screen. The grinding machine uses a high-speed rotating grinding wheel to grind the starch in the rice residue into a paste. Then, the 100-mesh stainless steel filter screen inside the vibrating screen is used to remove large particles of fiber, rice skin and other impurities, so as to obtain a fine starch paste. The starch obtained is finer than that obtained by conventional crushers and there are no large particles of impurities.

[0015] (3) The starch slurry separation of this utility model adopts horizontal screw centrifuge for separation and collection. Compared with traditional natural sedimentation, the equipment occupies a small area, has a large processing capacity and high efficiency, and the obtained starch has low moisture content and high quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Among them: 1-Screw conveyor, 2-Extraction tank, 3-Agitator blade, 4-Discharge pipe, 5-Discharge pump, 6-Storage tank, 7-Screw pump, 8-Grinding mill, 9-Vibrating screen, 10-Filtration collection tank, 11-Horizontal screw feed pump, 12-Horizontal screw centrifuge, 13-Horizontal screw residue collection tank, 14-Jacket, 15-Extraction tank circulation valve, 16-Extraction tank discharge valve, 17-Liquid tank. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., which indicate the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] This embodiment describes a comprehensive utilization system for extracting anthocyanins from black rice and separating starch, see [link to relevant documentation]. Figure 1 The system includes a screw conveyor 1, an extraction tank 2 at the outlet of the screw conveyor 1, a stirring blade 3 inside the extraction tank 2, a liquid outlet pipe 4 on one side of the extraction tank 2, a liquid outlet pipe 4 connected to a liquid outlet pump 5 via a valve, a liquid outlet pump 5 connected to the extraction tank 1 and a storage tank 6 via pipes, a screw pump 7 connected to the slag outlet at the bottom of the extraction tank 6 via pipes and valves, a grinding mill 8 at the outlet of the screw pump 7, a vibrating screen 9 at the outlet of the grinding mill 8, a filtrate collection tank 10 at the filtrate outlet of the vibrating screen 9, a filtrate collection tank 10 connected to a horizontal screw centrifuge 12 via a horizontal screw feed pump 11, and a horizontal screw slag collection tank 13 at the slag discharge port of the horizontal screw centrifuge 12.

[0022] Preferably, in this embodiment, the outer wall of the extraction tank 2 is provided with a heating jacket 14, which can heat the material in the extraction tank 1 with steam.

[0023] Preferably, the vibrating screen 9 in this embodiment is equipped with a 100-mesh stainless steel filter screen, which can trap large particles of fiber, rice bran and other impurities, thereby obtaining a fine starch slurry.

[0024] Preferably, in this embodiment, a stainless steel filter screen is also installed at the outlet pipe 4, which can be used for external circulation of the extract or for discharging the extract.

[0025] Preferably, in this embodiment, the screw pump 7 is controlled by a variable frequency motor, which can uniformly and stably transport rice residue and water to subsequent processes.

[0026] Preferably, in this embodiment, a plurality of stirring blades 3 are arranged from top to bottom inside the extraction tank 1, so as to mix the precipitate and liquid in the extraction tank 1 evenly.

[0027] The working process of this utility model is as follows: Turn on the screw conveyor 1, and let the black rice raw material enter the extraction tank 2 through the outlet of the screw conveyor 1. After the black rice raw material in the extraction tank 2 reaches a certain height, turn off the screw conveyor 1. Add the extraction solvent to the extraction tank 2, and open the valve of the outlet pipe 4, the outlet pump 5, and the extraction tank circulation valve 15. The solvent flows into the extraction tank 2 through the filter screen of the outlet pipe 4 for circulation. The black rice raw material is trapped in the extraction tank 2 by the filter screen. At the same time, turn on the agitator in the extraction tank 2 to allow the raw material and solvent to mix thoroughly. Steam is introduced into the jacket 14 of the extraction tank 2 to heat the material in the extraction tank 2. When the material temperature reaches the set value, turn off the steam to stop heating. After a certain period of time, close the extraction tank circulation valve 15, open the extraction tank outlet valve 16, and pump the extract into the storage tank 6. After the extraction is completed, turn off the outlet pump 5 and the corresponding valve. Add the extraction solvent to the extraction tank 2 again, and repeat the above extraction steps multiple times until the anthocyanins in the black rice raw material are completely extracted. Finally, add purified water to extraction tank 2, turn on the agitator in extraction tank 2 to mix the raw materials and water evenly, open the discharge valve and screw pump 7 at the bottom of extraction tank, and pump the rice residue and water in extraction tank 2 into grinder 8. Start grinder 8, and the black rice raw material is ground into fine millet slurry which flows into vibrating screen 9. Large particles such as fiber and peel in the rice slurry are intercepted by the vibrating screen filter and discharged from the slag outlet. The starch slurry passes through the filter screen and flows into the filtrate collection tank 10 from the filtrate outlet. Turn on the horizontal screw centrifuge 12 and the horizontal screw feed pump 11, and pump the filtrate into the drum of the horizontal screw centrifuge 12. The filtrate (i.e., starch slurry) generates a strong centrifugal force as the drum of the horizontal screw centrifuge 12 rotates at high speed. Water and water-soluble impurities enter the liquid tank 17 through the drain port in the center of the drum of the horizontal screw centrifuge 12. The starch is thrown to the inner wall of the drum of the horizontal screw centrifuge 12 and pushed to the slag discharge port by the discharge screw of the horizontal screw centrifuge 12. The starch falls from the slag discharge port into the horizontal screw slag collection tank 13, thus realizing the extraction of black rice anthocyanins and the collection of starch.

Claims

1. A comprehensive utilization system for extracting anthocyanins from black rice and separating starch, comprising a screw conveyor, characterized in that: The screw conveyor has an extraction tank at its outlet, which contains stirring blades. A liquid outlet pipe is located on one side of the extraction tank and is connected to a liquid outlet pump via a valve. The liquid outlet pump is connected to the extraction tank and a storage tank via pipes. A screw pump is connected to the slag outlet at the bottom of the extraction tank via pipes and valves. A grinding mill is located at the outlet of the screw pump, and a vibrating screen is located at the outlet of the grinding mill. A filtrate collection tank is located at the filtrate outlet of the vibrating screen. The filtrate collection tank is connected to a horizontal screw centrifuge via a horizontal screw feed pump. A horizontal screw slag collection tank is located at the slag discharge port of the horizontal screw centrifuge.

2. The comprehensive utilization system for extracting anthocyanins from black rice and separating starch according to claim 1, characterized in that: The outer wall of the extraction tank is equipped with a heating jacket.

3. The comprehensive utilization system for extracting anthocyanins from black rice and separating starch according to claim 1, characterized in that: The vibrating screen is equipped with a 100-mesh stainless steel filter screen.

4. The comprehensive utilization system for extracting anthocyanins and separating starch from black rice according to claim 1, characterized in that: A stainless steel filter screen is also installed at the liquid outlet pipe.

5. The comprehensive utilization system for extracting anthocyanins from black rice and separating starch according to claim 1, characterized in that: The screw pump is controlled by a variable frequency motor.

6. The comprehensive utilization system for extracting anthocyanins from black rice and separating starch according to claim 1, characterized in that: The extraction tank has several stirring blades arranged from top to bottom.

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