Rice milk liquefied liquid saccharification refining device

Abstract

The utility model discloses a saccharifying and refining device for rice milk liquefied liquid, which is characterized in that a bottom outlet of a syrup flash tank is connected with an inlet of a horizontal screw centrifuge through a flash discharge pump, a syrup clear liquid outlet of the horizontal screw centrifuge is connected with an inlet of a syrup tank, and a bottom outlet of the syrup tank is connected with an inlet of a saccharifying tank through a syrup tank output pump; an inlet pipeline of the saccharifying enzyme metering pump is inserted into the saccharifying enzyme tank, and an outlet of the saccharifying enzyme metering pump is also connected with the inlet of the saccharifying tank; a bottom outlet of the saccharifying tank is connected with a circulating pipeline of the membrane filtering equipment through a syrup conveying pump, a post-filtering outlet of the membrane filtering equipment is connected with an inlet of the pre-ion-exchange tank, and an outlet of the pre-ion-exchange tank is connected with the ion exchange equipment through a post-filtering syrup conveying pump. The device has no sanitary dead angles, can improve the light transmittance of the syrup and remove ions such as calcium, magnesium, sulfate radicals and the like in the syrup, and is good in product quality, low in energy consumption and less in pollutant emission.

Description

Technical Field

[0001] The utility model relates to a broken rice processing system, in particular to a rice slurry liquefaction saccharification and refining device, belonging to the technical field of broken rice processing equipment. Background Art

[0002] In the process of rice processing, about 20% rice husks, 15% broken rice and 10% rice bran are produced as by-products. These by-products are rich in protein, fat, starch, etc. Normally, we use broken rice and rice bran as feed and rice husk as fuel, which not only wastes resources but also has a certain impact on the environment.

[0003] Broken rice is of poorer quality than rice, with more impurities, high ash content and relatively cheap price. However, broken rice also has its advantages. It has a higher protein content than rice and contains high-quality starch. The protein content of broken rice can reach about 10.5%, while the protein content of rice is about 8.8%. The protein content of broken rice is about 2 percentage points higher than that of normal rice. Using broken rice to produce food-grade rice protein can increase the protein yield, turn waste into treasure, and increase the profits of production companies. Starch can be deeply processed to produce crystalline sugar. In the production process of crystalline sugar, the rice slurry must first be liquefied, and then the syrup and protein must be separated.

[0004] The Chinese invention patent with announcement number CN101555508B discloses a method for producing crystalline glucose from rice. The crystalline glucose is obtained by taking rice as raw material through soaking and grinding, slurry adjustment, liquefaction and slag removal, saccharification, primary neutralization and filtration, secondary neutralization and filtration, ion exchange, concentration and refining, crystallization and drying steps.

[0005] However, the above technical solutions and the prior art have the following defects:

[0006] 1. The use of chamber filter press or plate and frame filter press to separate syrup and protein has many dead corners, and black and hardened protein is easily generated between the plates and frames, which affects the subsequent deep processing of the protein;

[0007] 2. The method of heating up after saccharification to inactivate enzymes increases steam consumption and equipment investment. The syrup is decolorized with powdered activated carbon, which has obvious disadvantages. Powdered activated carbon is used to adsorb organic pigments in the syrup to increase the light transmittance of the syrup, but waste carbon and solid waste are generated in the process, polluting the environment.

[0008] 3. The flash steam produced by the syrup flash tank is directly discharged, and a large amount of white mist is generated, which puts great pressure on environmental protection. It is necessary to control and utilize the secondary flash steam to reduce energy consumption and improve the level of automation. At the same time, the solid content in the liquefied liquid is high and easy to precipitate, resulting in inability to produce continuously. Utility Model Content

[0009] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0010] In view of the above problems and / or the problems existing in the prior art, the present utility model is proposed.

[0011] The purpose of the utility model is to overcome the problems existing in the prior art and provide a rice slurry liquefaction saccharification and refining device, which has no sanitary dead corners, can improve the light transmittance of the syrup, remove calcium, magnesium, sulfate ions and the like in the syrup, has good product quality, low energy consumption and less pollutant emissions.

[0012] In order to solve the above technical problems, the utility model provides a rice slurry liquefied liquid saccharification and refining device, comprising a syrup flash tank, the bottom outlet of the syrup flash tank is connected to the inlet of a horizontal screw centrifuge through a flash discharge pump, the syrup clear liquid outlet of the horizontal screw centrifuge is connected to the inlet of a syrup tank, and the bottom outlet of the syrup tank is connected to the inlet of a saccharification tank through a syrup tank output pump; the inlet pipe of a saccharifying enzyme metering pump is inserted into the saccharifying enzyme tank, and the outlet of the saccharifying enzyme metering pump is also connected to the inlet of the saccharification tank; the bottom outlet of the saccharification tank is connected to the circulation pipeline of a membrane filtration device through a syrup delivery pump, the post-filtration outlet of the membrane filtration device is connected to the inlet of a pre-ionization tank, and the outlet of the pre-ionization tank is connected to an ion exchange device through a post-filtration syrup delivery pump.

[0013] As an improvement of the utility model, the circulation outlet of the membrane filtration device is connected to the inlet of the protein tank, and the outlet of the protein tank is connected to the reflux port of the syrup flash tank through a protein delivery pump.

[0014] As a further improvement of the utility model, the solid phase outlet of the horizontal screw centrifuge is connected to the protein buffer tank.

[0015] As a further improvement of the utility model, the ion exchange equipment includes a strong acid cation exchange column, a weak base anion exchange column, a strong acid cation exchange column and a weak base anion exchange column connected in series, and the outlet of the terminal weak base anion exchange column is connected to the evaporation buffer tank.

[0016] As a further improvement of the utility model, the top flash steam outlet of the syrup flash tank is connected to the heat source inlet of the second-effect evaporator.

[0017] As a further improvement of the utility model, the outlet of the syrup tank output pump is connected to the hot side inlet of the plate heat exchanger, the hot side outlet of the plate heat exchanger is connected to the main inlet of the static mixer, the side inlet of the static mixer is connected to the acid addition pipeline, and the outlet of the static mixer is connected to the inlet of the saccharification tank.

[0018] Compared with the prior art, the utility model has achieved the following beneficial effects: 1. The secondary flash steam generated by the flash tank is used as the heat source of the evaporation system, which reduces the energy consumption of the evaporation system. At the same time, the secondary steam is not discharged to the outside, and no white mist phenomenon is generated;

[0019] 2. Use decanter filter to replace plate and frame filter press for protein separation, which has no sanitary dead corners and no risk of plasticizers, meeting the production needs of food-grade protein; it can realize continuous production, without the need to clean the plate and frame filter cloth, and has low labor intensity; at the same time, the protein separated by decanter filter is loose, and it is easy to wash in the subsequent process;

[0020] 3. No additional steam enzyme inactivation is required after saccharification, which reduces steam consumption and equipment investment. Membrane filtration is used to replace activated carbon adsorption to remove large molecular organic pigments. At the same time, it can also remove large molecular impurities such as soluble proteins in the syrup, improve the light transmittance of the syrup, and reduce the burden of subsequent separation and refining sections.

[0021] 4. This device removes calcium, magnesium, sulfate and other ions in the syrup through mixed ion exchange equipment, reduces the conductivity of the syrup, improves the light transmittance, avoids scaling of subsequent evaporation devices, and maintains continuous and stable production;

[0022] 5. This device deeply processes broken rice, refines protein to make food-grade protein, liquefies starch to make crystalline sugar, rationally utilizes the effective ingredients in broken rice, and increases factory profits and product added value by saving energy and reducing consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. The drawings are only provided for reference and explanation, not for limiting the present utility model. Among them:

[0024] Figure 1 This is a flow chart of the rice slurry liquefaction saccharification and refining device of the utility model;

[0025] In the figure: syrup flash tank 207; flash discharge pump 208; horizontal screw centrifuge 209; syrup flow meter FT209; syrup regulating valve FC209; protein buffer tank 210; RO water flow meter FT210; RO water regulating valve FC210; protein slurry delivery pump 211; syrup tank 212; syrup tank output pump 213; plate heat exchanger 214; cooling water regulating valve TC214; cooling syrup temperature sensor TT214; static mixer 215; pH sensor PH215; acid storage tank 216; acid metering pump 217;

[0026] Saccharifying enzyme tank 301; saccharifying enzyme metering pump 302; saccharifying enzyme flowmeter FT302; saccharification tank 303; syrup delivery pump 304; membrane filtration equipment 305; membrane filtration circulation pump 306; protein tank 307; protein delivery pump 308; pre-ion exchange tank 309; post-filtration syrup delivery pump 310; strong acid cation exchange column 1 3111; weak base anion exchange column 1 3121; strong acid cation exchange column 2 3112; weak base anion exchange column 2 3122; ion exchange delivery pump 313;

[0027] Evaporation buffer tank 401; second effect evaporator 402. DETAILED DESCRIPTION

[0028] In the following description of the utility model, the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not mean that the device must have a specific direction.

[0029] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific figures. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0031] like Figure 1As shown, the rice slurry liquefied liquid saccharification and refining device of the utility model includes a syrup flash tank 207, a flash discharge pump 208, a horizontal screw centrifuge 209, a protein buffer tank 210, a protein slurry delivery pump 211, a syrup tank 212, a syrup tank output pump 213, and an acid storage tank 216; an acid metering pump 217, a saccharifying enzyme tank 301, a saccharification tank 303, a syrup delivery pump 304, a membrane filtration device 305, a membrane filtration circulation pump 306, a protein tank 307, a protein delivery pump 308, a pre-excitation tank 309, and a post-filtration syrup delivery pump 310.

[0032] The bottom outlet of the syrup flash tank 207 is connected to the inlet of the horizontal screw centrifuge 209 through the flash discharge pump 208. A liquid level gauge LT207 is installed on the side wall of the syrup flash tank 207. When the syrup flash tank 207 is lower than the set liquid level, the flash discharge pump 208 stops.

[0033] The top flash steam outlet of the syrup flash tank 207 is connected to the heat source inlet of the second-effect evaporator 402, and the top flash steam outlet of the syrup flash tank 207 is provided with a syrup flash steam temperature sensor TT207. The non-condensable gas outlet of the second-effect evaporator 402 is connected to the vacuum system through the second-effect non-condensable gas regulating valve. The opening of the second-effect non-condensable gas regulating valve is controlled by the flash steam temperature detected by the syrup flash steam temperature sensor TT207.

[0034] The pipeline between the outlet of the flash discharge pump 208 and the inlet of the horizontal screw centrifuge 209 is installed with a syrup flow meter FT209 and a syrup regulating valve FC209. The opening of the syrup regulating valve FC209 is controlled by the flow of the syrup flow meter FT209.

[0035] The syrup clear liquid outlet of the horizontal screw centrifuge 209 is connected to the inlet of the syrup tank 212, the bottom outlet of the syrup tank 212 is connected to the inlet of the syrup tank output pump 213, the outlet of the syrup tank output pump 213 is connected to the hot side inlet of the plate heat exchanger 214, the cold side of the plate heat exchanger 214 is connected to the cooling water circulation pipe, and a cooling water regulating valve TC214 is installed at the cold side inlet, and the opening of the cooling water regulating valve TC214 is controlled by the cooling syrup temperature sensor TT214 at the hot side outlet of the plate heat exchanger 214.

[0036] The hot side outlet of the plate heat exchanger 214 is connected to the main inlet of the static mixer 215, the mixing inlet of the static mixer 215 is connected to the acid adding pipeline, and the outlet of the static mixer 215 is connected to the saccharification section 300. The inlet pipeline of the acid metering pump 217 is inserted into the lower part of the acid storage tank 216, and the outlet of the acid metering pump 217 is connected to the mixing inlet of the static mixer 215.

[0037] A pH sensor PH215 is installed on the outlet post-mixing pipeline of the static mixer 215, and the cooled liquefied liquid is automatically acidified by the acid metering pump 217, and the acid and the material are mixed in the static mixer 215. The speed and acid addition flow of the acid metering pump 217 are automatically linked with the pH value measured by the pH sensor PH215.

[0038] The outlet of the static mixer 215 is connected to the inlet of the saccharification tank 303 ; the inlet pipe of the saccharifying enzyme metering pump 302 is inserted into the saccharifying enzyme tank 301 , and the outlet of the saccharifying enzyme metering pump 302 is also connected to the inlet of the saccharification tank 303 .

[0039] The bottom outlet of the saccharification tank 303 is connected to the circulation pipeline of the membrane filtration device 305 through the syrup delivery pump 304, the circulation outlet of the membrane filtration device 305 is connected to the inlet of the membrane filtration circulation pump 306 through the filtration circulation pipe, and the outlet of the membrane filtration circulation pump 306 is connected to the circulation inlet of the membrane filtration device 305 through the filtration circulation pipe.

[0040] The post-filtration outlet of the membrane filtration device 305 is connected to the inlet of the pre-ion exchange tank 309, and the outlet of the pre-ion exchange tank 309 is connected to the ion exchange device through the post-filtration syrup delivery pump 310. The ion exchange device includes a strong acid cation exchange column 1 3111, a weak base anion exchange column 1 3121, a strong acid cation exchange column 2 3112 and a weak base anion exchange column 2 3122 connected in series in sequence, an ion exchange delivery pump 313 is provided between the weak base anion exchange column 1 3121 and the strong acid cation exchange column 2 3112, and the outlet of the last stage weak base anion exchange column is connected to the evaporation buffer tank 401 of the evaporation section.

[0041] The circulation outlet of the membrane filtration device 305 is connected to the inlet of the protein tank 307 through a regulating valve, and the outlet of the protein tank 307 is connected to the reflux port of the syrup flash tank 207 through a protein delivery pump 308. The concentrated phase separated by the membrane filtration device 305 enters the protein tank 307, and the concentrated phase protein is delivered to the syrup flash tank 207 before separation through the protein delivery pump 308.

[0042] After liquefaction, the syrup enters the syrup flash tank 207 for flash cooling. The flash steam from the syrup flash tank 207 enters the second-effect evaporator 402. The cooled liquefied liquid is discharged from the bottom of the syrup flash tank 207 and sent to the horizontal screw centrifuge 209 through the flash discharge pump 208 for solid-liquid separation.

[0043] The light phase clear liquid separated by the horizontal screw centrifuge 209 is syrup, and the heavy phase is solid phase protein. The light phase syrup enters the syrup tank 212, and is transported to the hot side of the plate heat exchanger 214 through the syrup tank output pump 213 for cooling. After cooling, it enters the static mixer 215 and mixes with the acid solution sent by the acid metering pump 217 to adjust the pH value.

[0044] The liquefied liquid after adjusting the pH value is added with enzyme preparation online through the saccharifying enzyme metering pump 302. The outlet of the saccharifying enzyme metering pump 302 is installed with a saccharifying enzyme flowmeter FT302. The rotation speed of the saccharifying enzyme metering pump 302 is controlled by the flow rate of the saccharifying enzyme flowmeter FT302 to ensure that the enzyme preparation is added in proportion. The liquefied liquid after adding the enzyme preparation enters the saccharification tank 303 for saccharification.

[0045] The syrup in the saccharification tank 303 is transported to the membrane filtration device 305 through the syrup delivery pump 304 to filter and remove macromolecular impurities such as soluble protein and organic pigments. The clear liquid phase syrup of the membrane filtration enters the pre-ion exchange tank 309 for buffering, and the buffered syrup enters the ion exchange system through the post-filtration syrup delivery pump 310. The ion exchange system adopts a strong acid cation exchange column 3111-weak base anion exchange column 3121-strong acid cation exchange column 2 3112-weak base anion exchange column 2 3122 ion exchange scheme to remove calcium, magnesium, sulfate and other ions in the syrup, reduce the conductivity of the syrup, and improve the transmittance. The refined syrup goes to the evaporation stage.

[0046] The solid phase outlet of the horizontal screw centrifuge 209 is connected to the protein buffer tank 210, and the water inlet of the protein buffer tank 210 is connected to the RO water pipe. The RO water pipe is installed with an RO water flow meter FT210 and an RO water regulating valve FC210.

[0047] The above description is only the preferred feasible embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model, but does not limit the scope of patent protection of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. In addition to the above embodiments, the utility model can also have other implementation modes without departing from the spirit and scope of the utility model. The utility model will also have various changes and improvements. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents. The technical features not described in the utility model can be achieved by or using existing technologies, which will not be repeated here.

Claims

1. A rice syrup liquefaction saccharification and refining device, comprising a syrup flash tank (207), characterized in that: The bottom outlet of the syrup flash tank (207) is connected to the inlet of the horizontal screw centrifuge (209) through the flash discharge pump (208), the syrup clear liquid outlet of the horizontal screw centrifuge (209) is connected to the inlet of the syrup tank (212), and the bottom outlet of the syrup tank (212) is connected to the inlet of the saccharification tank (303) through the syrup tank output pump (213); the inlet pipe of the saccharifying enzyme metering pump (302) is inserted into the saccharifying enzyme tank (301), and the outlet of the saccharifying enzyme metering pump (302) is also connected to the inlet of the saccharifying tank (303); The bottom outlet of the saccharification tank (303) is connected to the circulation pipeline of the membrane filtration device (305) through a syrup delivery pump (304), the post-filtration outlet of the membrane filtration device (305) is connected to the inlet of the pre-ionization tank (309), and the outlet of the pre-ionization tank (309) is connected to the ion exchange device through a post-filtration syrup delivery pump (310).

2. The rice milk liquefaction saccharification and refining device according to claim 1, characterized in that: The circulation outlet of the membrane filtration device (305) is connected to the inlet of the protein tank (307), and the outlet of the protein tank (307) is connected to the reflux port of the syrup flash tank (207) through a protein delivery pump (308).

3. The rice milk liquefaction saccharification and refining device according to claim 1, characterized in that: The solid phase outlet of the horizontal screw centrifuge (209) is connected to the protein buffer tank (210).

4. The rice milk liquefaction saccharification and refining device according to claim 1, characterized in that: The ion exchange device comprises a strong acid cation exchange column 1 (3111), a weak base anion exchange column 1 (3121), a strong acid cation exchange column 2 (3112) and a weak base anion exchange column 2 (3122) which are sequentially connected in series, and the outlet of the terminal weak base anion exchange column is connected to the evaporation buffer tank (401).

5. The rice milk liquefaction saccharification and refining device according to claim 1, characterized in that: The top flash steam outlet of the syrup flash tank (207) is connected to the heat source inlet of the second-effect evaporator (402).

6. The rice milk liquefaction saccharification and refining device according to any one of claims 1 to 5, characterized in that: The outlet of the syrup tank output pump (213) is connected to the hot side inlet of the plate heat exchanger (214), the hot side outlet of the plate heat exchanger (214) is connected to the main inlet of the static mixer (215), the side inlet of the static mixer (215) is connected to the acid addition pipeline, and the outlet of the static mixer (215) is connected to the inlet of the saccharification tank (303).

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