Reaction device for cassava modified starch and modification method

Abstract

The invention discloses a reaction device for cassava modified starch and a denaturation method, the reaction device comprises a raw material mixing unit, a chemical reaction unit and a denaturation reaction unit, a discharge port of the raw material mixing unit is communicated with a reaction feed port of an oxidation reaction unit, a discharge port of the oxidation reaction unit is communicated with a feed port of the denaturation reaction unit, and a discharge port of the denaturation reaction unit is communicated with a feed port of the denaturation reaction unit. The denaturation reaction unit comprises a denaturation reaction kettle, a sealing cover body is arranged at an opening part at the top end of the denaturation reaction kettle, the sealing cover body comprises a cover body base and a sealing isolation hood body, a plurality of irradiation lamps irradiating into the denaturation reaction kettle are arranged in the cover body base, a controller is arranged at the top of the sealing isolation hood body, and the controller is connected with the sealing isolation hood body. A feed port and a plurality of denaturation ingredient input ports are respectively formed in the side wall of the denaturation reaction kettle, and a discharge port is formed in the bottom of the denaturation reaction kettle. According to the invention, the speed of denaturation reaction can be accelerated, the denaturation effect of cassava starch is greatly improved, and the phenomenon of caking at the bottom of the tank in the production process is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of starch processing, in particular to a reaction device and a denaturation method for cassava denatured starch. Background Art

[0002] Cassava starch includes two categories: native starch and various modified starches. It is mainly made of cassava starch after starch extraction, dehydration and drying. It is an important industrial raw material for food, sugar making, medicine, feed, textile, papermaking, chemical industry, etc. Since ordinary cassava starch that has not been modified cannot meet the needs of industrial production and application, hydrogen bonding will occur during storage at room temperature or low temperature, causing starch deterioration; modified starch refers to starch that has been treated to change its original physical or chemical properties. In order to improve the performance of starch and expand its application range, physical, chemical or enzymatic treatment is used to introduce new functional groups on starch molecules or change the size of starch molecules and the properties of starch particles, thereby changing the natural properties of starch, and then obtaining modified starch, which is suitable for use in various fields. The existing cassava starch modification process is carried out in a reaction device, and the reaction device has a complex structure. The production process of modified starch consumes a lot of time, the modification effect is poor, and the material on the bottom of the tank is easy to adhere to produce agglomeration, resulting in low product purity, affecting the use of users. Summary of the invention

[0003] The object of the present invention is to provide a reaction device and a denaturation method for cassava modified starch. The reaction device for cassava modified starch of the present invention can accelerate the speed of the denaturation reaction and reduce the production cycle. It has a simple structure and is easy to operate. Its denaturation production process can improve the stability of cassava modified products. In order to achieve the above object, the present invention adopts the following technical effects:

[0004] According to one aspect of the present invention, a reaction device for modified cassava starch is provided, the reaction device comprises a raw material mixing unit, an oxidation reaction unit and a denaturation reaction unit, the discharge port of the raw material mixing unit 1 is connected to the reaction feed port of the oxidation reaction unit, the discharge port of the oxidation reaction unit is connected to the feed port of the denaturation reaction unit, the denaturation reaction unit comprises a denaturation reaction kettle, the top opening of the denaturation reaction kettle is provided with a sealing cover body, the sealing cover body comprises a cover body base and a sealing isolation cover body, a plurality of irradiation lamps for irradiating into the interior of the denaturation reaction kettle are arranged in the cover body base, a controller is arranged on the top of the sealing isolation cover body, each irradiation lamp is electrically connected to the controller through a relay control switch, a feed port and a plurality of denaturation ingredient input ports are respectively arranged on the side walls of the denaturation reaction kettle, and a discharge port is arranged at the bottom of the denaturation reaction kettle.

[0005] The above scheme is further preferred, the raw material mixing unit comprises an irradiation tube, a batching tank, a vacuum pump and a vertically arranged raw material mixing tank body, a raw material adding inlet is arranged on the top side wall of the raw material mixing tank body, a batching adding inlet is arranged on the top side wall of the raw material mixing tank body on the opposite side of the raw material adding inlet, the material outlet of the batching tank is connected with the batching adding inlet at the top of the raw material mixing tank body through a batching conveying pipe, and a batching metering conveying pump is arranged on the batching conveying pipe;

[0006] A vacuum outlet connected to the vacuum pump is provided at the top of the raw material mixing tank and above one side of the raw material adding port. A starch spraying port and a first blower are provided on one side of the inlet of the irradiation tube. The starch spraying port is provided on the upper side wall of the inlet of the irradiation tube. The end of the inlet of the irradiation tube is connected to the air outlet of the first blower. The other end of the irradiation tube is connected to the raw material adding port. The bottom end of the raw material mixing tank is connected to the reaction feed port on the top side wall of the oxidation reaction unit through the first feed pipe. The reaction discharge port at the bottom of the oxidation reaction unit is connected to the feed port of the denaturation reactor through the second feed pipe.

[0007] The oxidation reaction unit includes an oxidation reaction tank, a reaction feed port is arranged on the top side wall of the oxidation reaction tank, an oxidation reaction mixing input port is arranged on the side wall of the oxidation reaction tank opposite to the reaction feed port, the reaction feed port on the oxidation reaction tank is connected with the outlet at the bottom end of the raw material mixing tank body through a first feed pipe, the bottom end of the raw material mixing tank body is connected with the reaction feed port on the top side wall of the oxidation reaction unit through the first feed pipe, the reaction discharge port at the bottom of the oxidation reaction tank is connected with the feed port of the denaturation reactor through a second feed pipe, an oxidation reaction stirring motor is installed above the center of the top end of the oxidation reaction tank, an oxidation reaction stirring shaft extending vertically downward into the oxidation reaction tank is arranged at the output end of the oxidation reaction stirring motor, stirring blades are arranged on the oxidation reaction stirring shaft, and a steam aeration pipe extending vertically into the bottom end of the oxidation reaction tank is arranged at the top of the oxidation reaction tank.

[0008] The above scheme is further preferred, that a blocking filter mesh cover is arranged in the raw material mixing tank body and in front of the raw material addition port, the top end of the blocking filter mesh cover is fixed on the inner wall of the raw material mixing tank body above the raw material addition port, the bottom end of the blocking filter mesh cover is located on the middle and lower side wall of the raw material mixing tank body, a high-speed air inlet is arranged on the side wall of the raw material mixing tank body below the raw material addition port and in front of the center of the blocking filter mesh cover, a slag discharge port is arranged on the side wall of the raw material mixing tank body below the high-speed air inlet, the bottom end of the blocking filter mesh cover is flush with the slag discharge port, the raw material addition port and the high-speed air inlet are respectively arranged on the side wall of the raw material mixing tank body in a tangential direction, and the blocking filter mesh cover is in an arc shape protruding along the center direction of the raw material mixing tank body.

[0009] The above scheme is further preferred, in which a mixing and stirring motor is arranged on the outside of the top end of the raw material mixing tank body, and a mixing and stirring shaft is arranged between the top end and above the mixing discharge port at the bottom end of the raw material mixing tank body, and the upper end of the mixing and stirring shaft vertically extends upward from the outside of the top end of the raw material mixing tank body and is transmission-connected to the output end of the mixing and stirring motor.

[0010] The above scheme is further preferred, a denaturation reaction stirring shaft extending vertically upward into the denaturation reaction kettle is arranged below the bottom of the denaturation reaction kettle near the discharge port, a denaturation reaction stirring motor connected to the denaturation reaction stirring shaft is arranged below the bottom of the denaturation reaction kettle, and a stirring blade is arranged on the denaturation reaction stirring shaft inside the denaturation reaction kettle; the horizontal position height of the feed port is lower than the height of the denaturation ingredient input port, the cover base is hollow and open up and down, the sealing isolation cover is sealingly covered on the top opening of the cover base, a tempered glass sealing plate is arranged at the bottom end of the inner wall of the cover base, a plurality of irradiation support tubes penetrating the tempered glass sealing plate are arranged on the tempered glass sealing plate, and the irradiation lamp is sealed and embedded in the irradiation support tube; a support plate for placing and supporting the irradiation lamp is fixedly arranged inside the cover base and directly above the tempered glass sealing plate, and the irradiation lamp is sealed and supported in the irradiation support tube in the cover base through the support plate.

[0011] The above scheme is further preferred, that an annular spray pipe is arranged around the inner wall of the denaturation reactor and near the top of the feed port, an infusion connecting pipe is arranged outside the denaturation reactor and extends into the interior of the denaturation reactor and connected with the annular spray pipe, a plurality of spray branch pipes are arranged on the annular spray pipe, a plurality of temperature and humidity sensors and a plurality of light intensity sensors are arranged below the inner area of ​​the annular spray pipe, and the temperature and humidity sensors and the light intensity sensors are electrically connected to the controller respectively.

[0012] The above scheme is further preferred, in which a cooling shell is circumferentially arranged on the outer wall of the denaturation reactor between the top of the feed port and the bottom of the annular spray pipe, and a plurality of cooling exhaust pipes are arranged on the side wall of the denaturation reactor, the air inlet end of the cooling exhaust pipe is extended into the denaturation reactor, the air outlet end of the cooling exhaust pipe extends outward from the denaturation reactor and is arranged in the cooling shell, an air pressure sensor is arranged in the denaturation reactor and at the air inlet end of the cooling exhaust pipe, cooling water is contained in the cooling shell to submerge the air outlet end of the cooling exhaust pipe, an exhaust pump is arranged at the air outlet end of the cooling exhaust pipe and close to the outer wall of the denaturation reactor, and an electromagnetic exhaust valve electrically connected to the controller is arranged on each cooling exhaust pipe between the exhaust pump and the outer wall of the denaturation reactor.

[0013] The above scheme is further preferred, that the outlet end of the cooling exhaust pipe has a straight pipe portion and a bent pipe portion, the straight pipe portion of the cooling exhaust pipe is arranged between the outside and the inside of the denaturation reactor, the bent pipe portion extends from the outer wall of the denaturation reactor and gradually bends in the direction of exit and extends below the liquid surface of the cooling water in the cooling water, and the exhaust pump is arranged on the outer wall of the bent pipe portion.

[0014] The above scheme is further preferred, wherein the denaturation reactor comprises a reverse reactor shell and a reactor liner, a heating cavity is arranged between the reverse reactor shell and the reactor liner, a heat source input port communicating with the heating cavity is arranged on the top end side of the reverse reactor shell, and a heat source output port communicating with the heating cavity is arranged on the bottom end side of the reverse reactor shell.

[0015] According to another aspect of the present invention, a denaturation method using a reaction device for cassava denatured starch of the present invention comprises the following steps:

[0016] Step 1, weighing raw materials, weighing cassava starch, mixed ingredients, oxidized ingredients and denatured reaction materials by mass, and mixing the mixed ingredients, oxidized ingredients and denatured reaction materials with deionized water to form a solution;

[0017] Step 2, mixing reaction, cassava starch is sprayed at high speed along the starch spraying port, so that the cassava starch flows into the irradiation tube (10) at high speed for irradiation and is sent into the raw material mixing tank from the raw material adding port. At the same time, the mixed ingredients in the ingredient tank (11) are pumped into the raw material mixing tank from the ingredient adding port, so that the cassava starch is mixed with the sprayed mixed ingredients during the high-speed flow process to obtain a cassava starch mixed material. After the feeding is completed, the raw material mixing tank is sealed, and the air in the raw material mixing tank is discharged through the vacuum pump, so that the cassava starch mixed material is mixed and stirred for reaction for 0.5-1 hour under vacuum conditions, and the cassava starch mixture is discharged into the oxidation reaction tank after the internal pressure of the raw material mixing tank returns to normal pressure;

[0018] Step 3, oxidation reaction, when the cassava starch mixture is fed into the oxidation reaction tank through the reaction inlet on the top side wall of the oxidation reaction tank, the oxidation ingredients are sprayed into the oxidation reaction tank from the oxidation reaction mixture input port, so that the oxidation ingredients and the cassava starch mixture collide head-on and then fall to the bottom of the oxidation reaction tank (200), and the oxidation reaction is carried out under stirring and steam aeration conditions;

[0019] Step 4, denaturation reaction, turn on the irradiation lamp arranged in the base of the cover body, discharge the cassava starch mixture after the oxidation reaction is completed and drop it into the denaturation reaction kettle, at the same time, spray the denaturation reaction material from the denaturation reaction kettle from the denaturation ingredient input port at high speed into the denaturation reaction kettle, start the denaturation reaction stirring motor at a fixed time to drive the denaturation reaction stirring shaft to stir the cassava starch mixture, after the cassava starch mixture and the denaturation reaction material are added, perform denaturation reaction under heating conditions, irradiate for 10min-30min after the reaction is completed, turn off the irradiation lamp, then cool and store for 1-2 hours, discharge the denatured cassava starch mixture from the discharge port of the denaturation reaction kettle, and then dry and grind to obtain the cassava denatured starch product.

[0020] In summary, the present invention adopts the above technical scheme, and the present invention has the following technical effects: the reaction device for modified cassava starch of the present invention can accelerate the speed of the modification reaction and reduce the production cycle, and the structure is simple and the operation is easy. The modification production process thereof can improve the stability of the modified cassava product, and can not only reduce the number of hydrophilic groups in the starch molecules, but also reduce the viscosity of the starch, thereby greatly improving the modification effect of the cassava starch, and the bottom of the tank is not easy to agglomerate during the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a reaction device for cassava modified starch of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the denaturation reaction unit of the present invention;

[0023] Figure 3 It is a schematic diagram of the overall structure of the sealing cover body of the present invention;

[0024] Figure 4 It is a schematic diagram of the internal structure of the sealing cover body of the present invention;

[0025] Figure 5 It is a schematic diagram of the installation structure of the annular spray pipe of the present invention;

[0026] Figure 6 It is a schematic structural diagram of a cooling exhaust pipe of the present invention;

[0027] Figure 7 is a control principle diagram of the denaturation reaction unit of the present invention;

[0028] In the drawings, a raw material mixing unit 1, an irradiation tube 10, a batching tank 11, a vacuum pump 12, a starch spray port 13, a first blower 14, a batching inlet 102, a raw material mixing tank body 100, a raw material inlet 101, a batching inlet 102, a vacuum outlet 103, a blocking filter screen 104, a guide slide 104a, a mixing and stirring motor 105, a mixing and discharging port 106, a mixing and stirring shaft 107, a high-speed air inlet 108, and a sealing switch valve 109a are provided.

[0029] Oxidation reaction unit 2, reaction feed port 20, oxidation reaction tank 200, oxidation reaction stirring motor 201, oxidation reaction stirring shaft 202, stirring blade 203, steam aeration pipe 204, oxidation exhaust valve 205,

[0030] Denaturation reaction unit 3, reaction feed inlet 20, denaturation reactor 30, sealing cover 31, feed inlet 32, denaturation ingredient input port 33, discharge port 34, denaturation reaction stirring shaft 35, annular spray pipe 36, infusion connecting pipe 37a, spray branch pipe 37b, temperature and humidity sensor 38, light intensity sensor 39, reactor shell 300, reactor liner 301, heating chamber 302, heat source input port 303, heat source output port 304, 04, cover base 310, sealed isolation cover 311, irradiation lamp 312, tempered glass sealing plate 313, irradiation support tube 314, support plate 315, cooling shell 320, cooling exhaust pipe 321, straight pipe part 321a, curved pipe part 321b, air pressure sensor 322, exhaust pump 323, electromagnetic exhaust valve 324, cooling water 332, stirring blade 350, denaturation reaction stirring motor 351, controller 3100;

[0031] A first material delivery pipe 4 , a second material delivery pipe 5 , a first control valve 40 , and a second control valve 50 . DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are only for the purpose of enabling the reader to have a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be implemented even without these specific details.

[0033] Combination Figure 1As shown, according to a reaction device for modified cassava starch of the present invention, the reaction device comprises a raw material mixing unit 1, an oxidation reaction unit 2 and a denaturation reaction unit 3, the discharge port of the raw material mixing unit 1 is connected with the reaction inlet 20 of the oxidation reaction unit 2, the discharge port of the oxidation reaction unit 2 is connected with the inlet of the denaturation reaction unit 3, the denaturation reaction unit 3 comprises a denaturation reaction kettle 30, the top opening of the denaturation reaction kettle 30 is provided with a sealing cover 31, the sealing cover 31 comprises a cover base 310 and a sealing isolation cover 311, a plurality of irradiation lamps 312 are arranged in the cover base 310 for irradiating into the interior of the denaturation reaction kettle 30, the irradiation lamps 312 are X-ray or gamma-ray lamps; a control lamp 314 is arranged on the top of the sealing isolation cover 311 The controller 3100 is provided with a plurality of irradiation lamps 312, each of which is electrically connected to the controller 3100 through a relay control switch. A feed port 32 and a plurality of denaturation ingredient input ports 33 are provided on the side walls of the denaturation reactor 30, and a discharge port 34 is provided at the bottom of the denaturation reactor 30. In the present invention, cassava starch is fed into the raw material mixing unit 1 and sprayed with a mixed ingredient (alkali solution, with a concentration of 10%-20%). After the feeding is completed, the alkali solution and the cassava starch are mixed evenly under vacuum conditions, and then fed into the oxidation reaction unit 2 and sprayed with an oxidizing ingredient (sodium hypochlorite solution) to oxidize and denature the cassava starch. After the oxidation and denaturation are completed, the cassava starch is fed into the denaturation reactor 30 and sprayed with a denaturation reaction material to perform a denaturation reaction under irradiation conditions.

[0034] In the present invention, Figure 1 and Figure 2The denaturation reactor 30 comprises a reactor shell 300 and a reactor liner 301, a heating chamber 302 is arranged between the reactor shell 300 and the reactor liner 301, a heat source input port 303 communicating with the heating chamber 302 is arranged on the top end side of the reactor shell 300, a heat source output port 304 communicating with the heating chamber 302 is arranged on the bottom end side of the reactor shell 300, a denaturation reaction stirring shaft 35 vertically extending upward into the denaturation reactor 30 is arranged below the bottom of the denaturation reactor 30 near the discharge port 34, a denaturation reaction stirring motor 351 transmission-connected to the denaturation reaction stirring shaft 35 is arranged below the bottom of the denaturation reactor 30, and a stirring blade 350 is arranged on the denaturation reaction stirring shaft 35 inside the denaturation reactor 30; according to the denaturation reaction The high-temperature hot water or high-temperature steam is sent into the heating cavity 302 through the heat source input port 303 on the reactor shell 300 to heat the reactor liner 301. The high-temperature hot water or high-temperature steam flows out from the heat source output port 304 and is circulated into the heating water tower (not shown). After being heated again by the heating water tower, it is sent into the heating cavity 302 through the conveying pipe through the heat source input port 303 to heat the entire denaturation reactor 30, so that the cassava starch mixture can be heated in the denaturation reactor 30 to maintain the temperature at 40-60°C for denaturation reaction. During the denaturation reaction, the denaturation reaction stirring shaft 35 is driven to rotate by the denaturation reaction stirring motor 351 and the stirring blade 350 is driven to rotate together, so as to stir the cassava starch mixture in the denaturation reactor 30 and accelerate the speed of the denaturation reaction.

[0035] In the present invention, Figure 1The raw material mixing unit 1 comprises an irradiation tube 10, a batching tank 11, a vacuum pump 12 and a vertically arranged raw material mixing tank body 100, a raw material adding port 101 is arranged on the top side wall of the raw material mixing tank body 100, a batching adding port 102 is arranged on the top side wall of the raw material mixing tank body 100 on the opposite side of the raw material adding port 101, a material discharging port of the batching tank 11 is connected with the batching adding port 102 at the top of the raw material mixing tank body 100 through a batching conveying pipe 110, and a batching metering conveying pump 111 is arranged on the batching conveying pipe 110; the irradiation tube 10 adopts electron beam irradiation (Electron beamirradiation (EBI) tube, using 5MeV ~ 10MeV / 20kW high-energy electron irradiation tube, cassava starch in the process of flowing through ionizing radiation, so that the linear chain and branched chain of starch molecules are initially cross-linked, which can reduce the molecular weight and viscosity of starch and increase the solubility of cassava starch in water; the ingredient metering delivery pump 111 pumps the mixed ingredients from the ingredient feeding port 102 into the raw material mixing tank 100 to mix with the high-speed flowing cassava starch, so that the cassava starch settles in the raw material mixing tank 100 under the action of the mixed ingredients; a vacuum outlet 110 connected to the vacuum pump 12 is provided at the top of the raw material mixing tank 100 and above one side of the raw material feeding port 101. 03. A starch spray inlet 13 and a first blower 14 are respectively provided on one side of the inlet of the irradiation tube 10. The starch spray inlet 13 is provided on the upper side wall of the inlet of the irradiation tube 10. The end of the inlet of the irradiation tube 10 is connected with the air outlet of the first blower 14. The other end of the irradiation tube 10 is connected with the raw material addition port 101. The bottom end of the raw material mixing tank body 100 is connected with the reaction feed port 20 on the top side wall of the oxidation reaction unit 2 through the first feed pipe 4. A first control valve 40 is provided on the first feed pipe 4. The reaction discharge port 21 at the bottom of the oxidation reaction unit 2 is connected with the feed port of the denaturation reactor 30 through the second feed pipe 5. A second control valve 50 is provided on the second feed pipe 5.

[0036] In the present invention, Figure 1The oxidation reaction unit 2 includes an oxidation reaction tank 200, a reaction feed inlet 20 is arranged on the top side wall of the oxidation reaction tank 200, an oxidation reaction mixing material input port 22 is arranged on the side wall of the oxidation reaction tank 200 opposite to the reaction feed inlet 20, the reaction feed inlet 20 on the oxidation reaction tank 200 is communicated with the outlet at the bottom end of the raw material mixing tank body 100 through a first feed pipe 4, the bottom end of the raw material mixing tank body 100 is communicated with the reaction feed inlet 20 on the top side wall of the oxidation reaction unit 2 through the first feed pipe 4, the reaction discharge port 21 at the bottom of the oxidation reaction tank 200 is communicated with the feed inlet of the denaturation reactor 30 through a second feed pipe 5, and an oxidation reaction mixture input port 22 is installed above the top center of the oxidation reaction tank 200. An oxidation reaction stirring motor 201 is provided at the output end of the oxidation reaction stirring motor 201 with an oxidation reaction stirring shaft 202 extending vertically downward into the oxidation reaction tank 200, a stirring blade 203 is provided on the oxidation reaction stirring shaft 202, a steam aeration pipe 204 is provided at the top of the oxidation reaction tank 200 and extends vertically into the bottom end of the oxidation reaction tank 200, a high-speed steam flow sent into the steam aeration pipe 204 is used to aerate the cassava starch mixture in the oxidation reaction tank 200, and an oxidation exhaust valve 205 is also provided at the top of the oxidation reaction tank 200, when the steam aeration pipe 204 is sent into the oxidation reaction tank 200 to exhaust the cassava starch mixture during the reaction, the air pressure in the oxidation reaction tank 200 is prevented from being too high.

[0037] In the present invention, Figure 1A mixing and stirring motor 105 is arranged on the outside of the top of the raw material mixing tank body 100, and a mixing and stirring shaft 107 is arranged between the top and the mixing discharge port 106 at the bottom of the raw material mixing tank body 100. The upper end of the mixing and stirring shaft 107 vertically extends out of the top of the raw material mixing tank body 100 and is transmission-connected to the output end of the mixing and stirring motor 105; a blocking filter screen cover 104 is arranged in the raw material mixing tank body 100 and in front of the raw material adding port 101. The top end of the blocking filter screen cover 104 is fixed on the inner wall of the raw material mixing tank body 100 above the raw material adding port 101, and the bottom end of the blocking filter screen cover 104 is located on the middle and lower side wall of the raw material mixing tank body 100. A high-speed air inlet 108 is arranged on the side wall of the raw material mixing tank body 100 below the high-speed air inlet 108 and in front of the center of the blocking filter screen cover 104, and a second blower 15 is arranged on the high-speed air inlet 108. A slag discharge port 109 is arranged on the side wall of the raw material mixing tank body 100 below the high-speed air inlet 108, and a sealing switch valve 109a is arranged on the slag discharge port 109. The bottom end of the blocking filter screen cover 104 is flush with the slag discharge port 109. More specifically, the bottom end of the blocking filter screen cover 104 is connected to the inner side wall of the raw material mixing tank body 100 through an inclined guide slide 104a, and the bottom end of the guide slide 104a is flush with the slag discharge port 109, so that the impurities or particles blocked by the blocking filter screen cover 104 can be removed. The cassava starch falls onto the guide slide plate 104a and slides to the slag discharge port 109 for discharge; the raw material adding port 101 and the high-speed air inlet 108 are respectively arranged on the side wall of the raw material mixing tank body 100 in a tangential direction, and the blocking filter screen 104 is in an arc shape protruding along the central direction of the raw material mixing tank body 100. When the cassava starch is irradiated from the irradiation tube 10, it flows into the raw material mixing tank body 100 at a high speed from the raw material adding port 101, is blocked by the arc-shaped blocking filter screen 104, and under the action of the high-speed air flow of the second blower 15, the flow speed of the cassava starch in the raw material mixing tank body 100 is increased, and the cassava starch is accelerated to pass through the blocking filter screen 104 and dispersed in the raw material mixing tank body 100; due to the raw material adding port 101, the cassava starch is irradiated from the irradiation tube 10, and the cassava starch is irradiated from the irradiation tube 10. The inlet 101 and the high-speed air inlet 108 are respectively arranged tangentially, so that after the cassava starch enters the raw material mixing tank body 100 tangentially, it is blocked by the blocking filter screen cover and dispersed, and most of it can fall in a spiral shape. At the same time, the ingredient adding port 102 is pumped into the raw material mixing tank body 100, so that the cassava starch is mixed with the mixed ingredients fed from the spraying ingredient adding port 102 during the high-speed flow process, and large particles of cassava starch or impurities fall onto the guide slide plate 104a at the lower end of the blocking filter screen cover 104, and can be discharged through the slag discharge port 109. The slag discharge port 109 and the high-speed air inlet 108 are respectively provided with a sealing switch valve 109a. The sealing switch valve 109a is opened when adding materials, and the sealing valve 109 is closed after the addition is completed.Then start the vacuum pump 12 to exhaust the air in the raw material mixing tank 100, so that the cassava starch and the mixed ingredients are mixed and reacted in a vacuum environment for 1-2 hours. During the mixing reaction, the mixing and stirring motor 105 is started every 10-20 minutes to stir once, and the stirring speed does not exceed 80r / min;

[0038] In the present invention, Figure 1 , Figure 2 , Figure 3 As shown, the horizontal position height of the feed port 32 is lower than the height of the denatured ingredient input port 33, and the denatured reaction material sprayed into the denatured ingredient input port 33 at a high speed can completely impact, collide and mix with the cassava starch mixture in the falling process. The cover base 310 is hollow and open at the top and bottom. The sealed isolation cover 311 is sealed to cover the top opening of the cover base 310. A tempered glass sealing plate 313 is provided at the bottom end of the inner wall of the cover base 310. A plurality of irradiation support tubes 314 penetrating the tempered glass sealing plate 313 are provided on the tempered glass sealing plate 313. The irradiation lamp 312 is sealed and embedded in the irradiation support tube 31 4; a support plate 315 for placing and supporting an irradiation lamp 312 is fixedly arranged inside the cover base 310 and directly above the tempered glass sealing plate 313; the irradiation lamp 312 is embedded in an irradiation support tube 314 and is fixed on the support plate 315 as a whole; the radiation light is transmitted to the denaturation reactor 30 through the irradiation support tube 314; the light generated by the irradiation lamp 312 can be transmitted into the denaturation reactor 30 through the tempered glass sealing plate 313; the irradiation lamp 312 is sealed and supported in the irradiation support tube 314 in the cover base 310 through the support plate 315; an annular spray pipe 36 is arranged around the inner wall of the denaturation reactor 30 and close to the upper part of the feed port 32, such as Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 7As shown, an infusion connection pipe 37a extending into the interior of the denaturation reactor 30 and connected to the annular spray pipe 36 is arranged outside the denaturation reactor 30, a plurality of spray branch pipes 37b are arranged on the annular spray pipe 36, and a plurality of temperature and humidity sensors 38 at different heights and a plurality of light intensity sensors 39 at different heights are arranged below the inner area of ​​the annular spray pipe 36, and the temperature and humidity sensors 38 and the light intensity sensors 39 are electrically connected to the controller 3100 respectively; in the present invention, the controller 3100 is a PLC controller, and the oxidized cassava starch mixture is fed into the denaturation reactor 30 through the reaction discharge port 21 at the bottom of the oxidation reaction tank 200, the first feed pipe 4, and the feed port 32. During the falling process of the oxidized cassava starch mixture entering the denaturation reactor 30 from the feed port 32, it is first irradiated by the support irradiation lamp 312 arranged on the cover base 310, and the PLC controller obtains the temperature and humidity sensor 3 8 and the light intensity of the irradiation lamp 312 collected by the light intensity sensor 39. Secondly, since the irradiation intensity of the cassava starch mixture is gradually weakened during the falling process and collides with the denatured reaction material sprayed into the denatured reaction kettle 30 at a high speed through the denatured ingredient input port 33, the cassava starch mixture is mixed with the denatured ingredients during the falling process under irradiation. The relay control switch of each irradiation lamp 312 can be controlled by the PLC controller to control the working state of the irradiation lamp 312, thereby adjusting the irradiation intensity; at the same time, the spray control valve (not debugged) on the infusion connecting pipe 37a is controlled according to the temperature and humidity parameters, so that water is cooled and humidified along the infusion connecting pipe 37a, the annular spray pipe 36, and the spray branch pipe 37b to cool the reaction environment in the denatured reaction kettle 30. After the denaturation reaction is completed, the denatured reaction kettle 30 can also be cleaned through the spray branch pipe 37b on the annular spray pipe 36.

[0039] In the present invention, if Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7As shown, a cooling shell 320 is circumferentially arranged on the outer wall of the denaturation reactor 30 between the upper part of the feed port 32 and the lower part of the annular spray pipe 36, and a plurality of cooling exhaust pipes 321 are arranged on the side wall of the denaturation reactor 30. The air inlet end of the cooling exhaust pipe 321 is extended into the denaturation reactor 30, and the air outlet end of the cooling exhaust pipe 321 extends outward from the denaturation reactor 30 and is arranged in the cooling shell 320. A pressure sensor 322 is provided at the air inlet end of the cooling shell 320, cooling water 332 is contained in the cooling shell 320 and submerged at the air outlet end of the cooling exhaust pipe 321, an exhaust pump 323 is provided at the air outlet end of the cooling exhaust pipe 321 and close to the outer wall of the denaturation reactor 30, and an electromagnetic exhaust valve 324 electrically connected to the controller 3100 is provided on each cooling exhaust pipe 321 between the exhaust pump 323 and the outer wall of the denaturation reactor 30; The gas outlet end has a straight pipe portion 321a and a curved pipe portion 321b. The straight pipe portion 321a of the cooling exhaust pipe 321 is arranged between the outside and the inside of the denaturation reactor 30. The curved pipe portion 321b extends from the outer wall of the denaturation reactor 30 and gradually bends in the direction of the outlet to extend below the liquid surface of the cooling water 332 in the cooling water 332. The exhaust pump 323 is arranged on the outer wall of the curved pipe portion 321b. In the present invention, during the reaction of the denaturation reaction material and the cassava starch mixture, the air pressure in the denaturation reactor 30 increases due to the continuous increase in temperature and humidity. The pressure in the denaturation reactor 30 is obtained by the air pressure sensor 322. When the air pressure is greater than the preset pressure value, the controller 3100 outputs a control instruction to start the electromagnetic exhaust valve 324 and the exhaust pump 323, and the internal hot air is discharged along the cooling exhaust pipe 321 into the cooling shell 320 and collected by the cooling water 332, so that the internal pressure of the denaturation reactor 30 can be quickly adjusted.

[0040] In the present invention, combined with Figures 1 to 7 As shown, the present invention utilizes a cassava modified starch reaction device to modify cassava starch, and the modification method comprises the following steps:

[0041] Step 1, weighing raw materials, weighing cassava starch, mixed ingredients, oxidation ingredients and denaturation reaction materials by mass, mixing the mixed ingredients, oxidation ingredients and denaturation reaction materials with deionized water to form a solution, the deionized 3-8 μS / cm; the amount of sodium hydroxide used is 2% to 5% of the amount of cassava starch, the mixed ingredient is a sodium hydroxide solution, and the concentration of the sodium hydroxide solution is 10% to 20%; the oxidation ingredient is sodium hypochlorite, the amount of sodium hypochlorite is 3% to 8% of the cassava starch, and the concentration of the sodium hypochlorite solution is 3-12%; the denaturation reaction material is acetic anhydride, methanesulfonic acid, and sodium tripolyphosphate, which are composed of a molar ratio of 1:2 to 4:1; the denaturation reaction material is used to carry out esterification reaction with cassava starch, which can reduce the production cycle, is easy to operate, has high product stability, increases its elasticity, and reduces viscosity;

[0042] Step 2, mixing reaction, cassava starch is sprayed into the starch spray port 13 at a high speed, so that the cassava starch flows into the irradiation tube 10 at a high speed for irradiation and is sent into the raw material mixing tank body 100 from the raw material adding port 101. At the same time, the mixed ingredients in the ingredient tank 11 are pumped into the raw material mixing tank body 100 from the ingredient adding port 102, so that the cassava starch is mixed with the sprayed mixed ingredients during the high-speed flow process to obtain a cassava starch mixed material, wherein the mixed ingredient is a sodium hydroxide solution (alkali solution), and after the feeding is completed, the raw material mixing tank body 100 is sealed, and the vacuum pump 12 is started to discharge the air in the raw material mixing tank body 100, so that the cassava starch mixed material is mixed and stirred for 0.5-1 hour under vacuum conditions, and the cassava starch mixture is discharged to the oxidation reaction tank 200 after the internal pressure of the raw material mixing tank body 100 is returned to the normal pressure state, and the cassava starch mixture is discharged to the oxidation reaction tank 200, and the vacuum is extracted after fully stirring, and the stirring is once every 10-20min, and the stirring speed does not exceed 80r / min, and the vacuum degree extracted is 200-300Pa;

[0043] Step 3, oxidation reaction, when the cassava starch mixture is fed into the oxidation reaction tank 200 through the reaction inlet 20 on the top side wall of the oxidation reaction tank 200, the oxidation ingredients are sprayed into the oxidation reaction tank 200 from the oxidation reaction mixture input port 22, so that the oxidation ingredients and the cassava starch mixture collide head-on and then fall to the bottom of the oxidation reaction tank 200, and the oxidation reaction is carried out under stirring and steam aeration conditions, the steam temperature is between 105° C. and 115° C., and the flow rate of steam aeration is maintained at 0.05-0.15 m / s. 3 / min; when the internal air pressure is too high, exhaust is performed through the oxidation exhaust valve 205 to prevent the air pressure in the oxidation reaction tank 200 from being too high, wherein the oxidation ingredient is a sodium hypochlorite solution; after the reaction is completed and allowed to stand for 30min-90min, the cassava starch mixture after the oxidation reaction is discharged into the denaturation reaction kettle 30;

[0044] Step 4, denaturation reaction, open the irradiation lamp 312 set in the cover base 310, discharge the cassava starch mixture after the oxidation reaction is completed and drop it into the denaturation reactor 30, at the same time, spray the denaturation reaction material from the denaturation reactor 30 from the denaturation ingredient input port 33 at high speed into the denaturation reactor 30 for denaturation reaction under heating conditions, during the high-speed spraying of the cassava starch mixture and the denaturation reaction process, start the denaturation reaction stirring motor 351 at a fixed time to rotate and drive the denaturation reaction stirring shaft 35 to stir the cassava starch mixture, thereby reducing the agglomeration phenomenon, and the stirring rate of the denaturation reaction stirring motor 351 is 60-120r / min; heat and maintain the temperature at 40-60°C for denaturation reaction for 0.5-1h, wherein the irradiation dose is 5-15kGy, and after the spraying of the cassava starch mixture is completed, irradiate for 10min-30min and then turn off the irradiation lamp 312.

[0045] In the present invention, the denaturation reaction parameters (air pressure, temperature and light intensity) can be adjusted according to the air pressure, temperature and light intensity in the denaturation reaction kettle 30 to carry out the reaction, so that the reaction parameters in the denaturation reaction kettle 30 are kept within a constant range. After the reaction is completed, the irradiation lamp 312 is extinguished, and the cassava starch mixture of the denaturation reaction is discharged from the discharge port 34 of the denaturation reaction kettle 30 after being sealed and cooled for 1-2 hours, and then dried and ground to obtain the finished cassava modified starch. The present invention uses sodium hydroxide and sodium hypochlorite as catalysts and adds acetic anhydride and chloroacetic acid to react under irradiation and heating conditions to obtain the modified starch, which can quickly accelerate the breakage of starch macromolecules and reduce the viscosity of the modified cassava starch.

[0046] In the denaturation method of the present invention, cassava starch is firstly mixed with a sodium hydroxide solution after preliminary irradiation, and a mixing reaction is carried out under vacuum conditions to catalyze the cassava starch to produce ionization and excitation effects, thereby forming free radicals and ions, which can quickly undergo further denaturation reactions; sodium hypochlorite solution is then sprayed into the cassava starch mixture to mix the ions in the starch with the sodium hypochlorite to undergo oxidation reactions, decompose to produce oxidation products (oxygen free radicals), and finally sent to a denaturation reactor 30 to undergo an esterification reaction under irradiation and heating conditions, thereby generating highly activated free radicals, which break CC bonds, CO bonds, and CH bonds in macromolecules in the cassava starch, thereby reducing not only the number of hydrophilic groups in the starch molecules, but also the viscosity of the starch.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A reaction device for cassava modified starch, characterized in that: The reaction device comprises a raw material mixing unit (1), an oxidation reaction unit (2) and a denaturation reaction unit (3); the discharge port of the raw material mixing unit (1) is connected to the reaction inlet (20) of the oxidation reaction unit (2); the discharge port of the oxidation reaction unit (2) is connected to the inlet of the denaturation reaction unit (3); the denaturation reaction unit (3) comprises a denaturation reaction kettle (30); the top opening of the denaturation reaction kettle (30) is provided with a sealing cover (31); the sealing cover (31) comprises a cover base (310) and a sealing cover (311). A sealed isolation cover (311) is provided inside the cover base (310), and a plurality of irradiation lamps (312) are provided inside the denaturation reactor (30). A controller (3100) is provided on the top of the sealed isolation cover (311), and each irradiation lamp (312) is electrically connected to the controller (3100) via a relay control switch. A feed port (32) and a plurality of denaturation ingredient input ports (33) are provided on the side walls of the denaturation reactor 30, and a discharge port (34) is provided at the bottom of the denaturation reactor (30).

2. A reaction device for modified cassava starch according to claim 1, characterized in that: The raw material mixing unit (1) comprises an irradiation tube (10), a batching tank (11), a vacuum pump (12) and a vertically arranged raw material mixing tank body (100); a raw material adding port (101) is arranged on the top side wall of the raw material mixing tank body (100); a batching adding port (102) is arranged on the top side wall of the raw material mixing tank body (100) on the opposite side of the raw material adding port (101); a material outlet of the batching tank (11) is connected to the batching adding port (102) at the top of the raw material mixing tank body (100) through a batching conveying pipe (110); and a batching metering conveying pump (111) is arranged on the batching conveying pipe (110); A vacuum outlet (103) connected to the vacuum pump (12) is provided at the top of the raw material mixing tank (100) and above one side of the raw material adding port (101); a starch spray port (13) and a first blower (14) are provided at one side of the inlet of the irradiation tube (10); the starch spray port (13) is provided on the upper side wall of the inlet of the irradiation tube (10); the end of the inlet of the irradiation tube (10) is connected to the air outlet of the first blower (14); the other end of the irradiation tube (10) is connected to the raw material adding port (101); the bottom end of the raw material mixing tank (100) is connected to the reaction feed port (20) on the top side wall of the oxidation reaction unit (2) through the first feed pipe (4); the reaction discharge port (21) at the bottom of the oxidation reaction unit (2) is connected to the feed port of the denaturation reactor (30) through the second feed pipe (5); The oxidation reaction unit (2) comprises an oxidation reaction tank (200), a reaction feed inlet (20) is arranged on the top side wall of the oxidation reaction tank (200), and an oxidation reaction mixed material input port (22) is arranged on the side wall of the oxidation reaction tank (200) opposite to the reaction feed inlet (20), the reaction feed inlet (20) on the oxidation reaction tank (200) is connected to the outlet at the bottom end of the raw material mixing tank body (100) through a first feed delivery pipe (4), and the bottom end of the raw material mixing tank body (100) is connected to the reaction feed inlet (20) on the top side wall of the oxidation reaction unit (2) through the first feed delivery pipe (4), The reaction discharge port (21) at the bottom of the oxidation reaction tank (200) is connected to the feed port of the denaturation reactor (30) through a second feed pipe (5); an oxidation reaction stirring motor (201) is installed above the center of the top of the oxidation reaction tank (200); an oxidation reaction stirring shaft (202) extending vertically downward into the oxidation reaction tank (200) is arranged at the output end of the oxidation reaction stirring motor (201); stirring blades (203) are arranged on the oxidation reaction stirring shaft (202); and a steam aeration pipe (204) extending vertically into the bottom of the oxidation reaction tank (200) is arranged at the top of the oxidation reaction tank (200).

3. A reaction device for modified cassava starch according to claim 2, characterized in that: A blocking filter screen (104) is arranged in the raw material mixing tank body (100) and in front of the raw material adding port (101). The top end of the blocking filter screen (104) is fixed to the inner wall of the raw material mixing tank body (100) above the raw material adding port (101). The bottom end of the blocking filter screen (104) is located on the middle and lower side wall of the raw material mixing tank body (100). The raw material mixing tank body (100) below the raw material adding port (101) and in front of the center of the blocking filter screen (104) is provided with a filter screen. ) is provided on the side wall of the raw material mixing tank body (100), a slag discharge port (109) is provided on the side wall of the raw material mixing tank body (100) below the high-speed air inlet (108), the bottom end of the blocking filter screen cover (104) is flush with the slag discharge port (109), the raw material addition port (101) and the high-speed air inlet (108) are respectively provided on the side wall of the raw material mixing tank body (100) in a tangential direction, and the blocking filter screen cover (104) is in an arc shape protruding along the center direction of the raw material mixing tank body (100).

4. A reaction device for modified cassava starch according to claim 2 or 3, characterized in that: A mixing and stirring motor (105) is arranged on the outside of the top end of the raw material mixing tank body (100), and a mixing and stirring shaft (107) is arranged between the top end and the top of the mixing discharge port (106) at the bottom end of the raw material mixing tank body (100). The upper end of the mixing and stirring shaft (107) vertically extends upward from the outside of the top end of the raw material mixing tank body (100) and is transmission-connected to the output end of the mixing and stirring motor (105).

5. A reaction device for modified cassava starch according to claim 1, characterized in that: A denaturation reaction stirring shaft (35) is arranged below the bottom of the denaturation reaction kettle (30) near the discharge port (34) and extends vertically upward into the denaturation reaction kettle (30); a denaturation reaction stirring motor (351) is arranged below the bottom of the denaturation reaction kettle (30) and is transmission-connected to the denaturation reaction stirring shaft (35); a stirring blade (350) is arranged on the denaturation reaction stirring shaft (35) inside the denaturation reaction kettle (30); the horizontal position height of the feed port (32) is lower than the height of the denaturation ingredient input port (33); the cover base (310) is hollow and open at the top and bottom; the sealing isolation cover (311) is sealingly covered on the cover base (311); 0), a tempered glass sealing plate (313) is arranged at the bottom end of the inner wall of the cover base (310), a plurality of irradiation support tubes (314) penetrating the tempered glass sealing plate (313) are arranged on the tempered glass sealing plate (313), and the irradiation lamp (312) is sealed and embedded in the irradiation support tube (314); a support plate (315) for placing and supporting the irradiation lamp (312) is fixedly arranged inside the cover base (310) and directly above the tempered glass sealing plate (313), and the irradiation lamp (312) is sealed and supported in the irradiation support tube (314) in the cover base (310) through the support plate (315).

6. A reaction device for modified cassava starch according to claim 1, 2 or 5, characterized in that: An annular spray pipe (36) is arranged along the inner wall of the denaturation reactor (30) and near the top of the feed port (32). An infusion connection pipe (37a) is arranged outside the denaturation reactor (30) and extends into the interior of the denaturation reactor (30) and is connected to the annular spray pipe (36). A plurality of spray branch pipes (37b) are arranged on the annular spray pipe (36). A plurality of temperature and humidity sensors (38) and a plurality of light intensity sensors (39) are arranged below the inner area of ​​the annular spray pipe (36). The temperature and humidity sensors (38) and the light intensity sensors (39) are electrically connected to the controller (3100) respectively.

7. A reaction device for modified cassava starch according to claim 6, characterized in that: A cooling shell (320) is circumferentially arranged on the outer wall of the denaturation reactor (30) between the upper side of the feed port (32) and the lower side of the annular spray pipe (36), and a plurality of cooling exhaust pipes (321) are arranged on the side wall of the denaturation reactor (30). The air inlet end of the cooling exhaust pipe (321) extends into the denaturation reactor (30), and the air outlet end of the cooling exhaust pipe (321) extends outward from the denaturation reactor (30) and is arranged in the cooling shell (320). An air pressure sensor (322) is provided at the air inlet end of the cooling exhaust pipe (321); cooling water (332) is contained in the cooling shell (320) and submerged at the air outlet end of the cooling exhaust pipe (321); an exhaust pump (323) is provided at the air outlet end of the cooling exhaust pipe (321) and close to the outer wall of the denaturation reactor (30); and an electromagnetic exhaust valve (324) electrically connected to the controller (3100) is provided on each cooling exhaust pipe (321) between the exhaust pump (323) and the outer wall of the denaturation reactor (30).

8. A reaction device for modified cassava starch according to claim 7, characterized in that: The outlet end of the cooling exhaust pipe (321) comprises a straight pipe portion (321a) and a curved pipe portion (321b); the straight pipe portion (321a) of the cooling exhaust pipe (321) is arranged to penetrate between the outside and the inside of the denaturation reactor (30); the curved pipe portion (321b) extends from the outer wall of the denaturation reactor (30) in an inlet and outlet direction and gradually bends and extends into the cooling water (332) below the liquid surface of the cooling water (332); and the exhaust pump (323) is arranged on the outer wall of the curved pipe portion (321b).

9. A reaction device for modified cassava starch according to claim 8, characterized in that: The denaturation reactor (30) comprises a reactor shell (300) and a reactor liner (301); a heating chamber (302) is arranged between the reactor shell (300) and the reactor liner (301); a heat source input port (303) communicating with the heating chamber (302) is arranged at the top end side of the reactor shell (300); and a heat source output port (304) communicating with the heating chamber (302) is arranged at the bottom end side of the reactor shell (300).

10. A method for modifying cassava modified starch using the reaction device according to any one of claims 1 to 9, characterized in that: The denaturation method comprises the following steps: Step 1, weighing raw materials, weighing cassava starch, mixed ingredients, oxidized ingredients and denatured reaction materials by mass, and mixing the mixed ingredients, oxidized ingredients and denatured reaction materials with deionized water to form a solution; Step 2, mixing reaction, cassava starch is sprayed at high speed along the starch spraying port (13), so that the cassava starch flows into the irradiation tube (10) at high speed for irradiation and is fed into the raw material mixing tank (100) from the raw material feeding port (101), and at the same time, the mixed ingredients in the ingredient tank (11) are pumped into the raw material mixing tank (100) from the ingredient feeding port (102), so that the cassava starch is mixed with the sprayed mixed ingredients during the high-speed flow process to obtain a cassava starch mixed material, and after the feeding is completed, the raw material mixing tank (100) is sealed, and the vacuum pump (12) is started to discharge the air in the raw material mixing tank (100), so that the cassava starch mixed material is mixed and stirred for reaction for 0.5-1 hour under vacuum conditions, and the cassava starch mixture is discharged to the oxidation reaction tank (200) after the internal pressure of the raw material mixing tank (100) returns to normal pressure; Step 3, oxidation reaction, when the cassava starch mixture is fed into the oxidation reaction tank (200) through the reaction inlet (20) on the top side wall of the oxidation reaction tank (200), the oxidation ingredients are sprayed into the oxidation reaction tank (200) through the oxidation reaction mixture input port (22), so that the oxidation ingredients and the cassava starch mixture collide head-on and then fall to the bottom of the oxidation reaction tank (200), and the oxidation reaction is carried out under stirring and steam aeration conditions; Step 4, denaturation reaction, open the irradiation lamp (312) arranged in the base (310) of the cover body, discharge the cassava starch mixture after the oxidation reaction is completed and drop it into the denaturation reaction kettle (30), at the same time, spray the denaturation reaction material from the denaturation reaction kettle (30) from the denaturation ingredient input port (33) into the denaturation reaction kettle (30) at high speed, start the denaturation reaction stirring motor (351) at a fixed time to rotate and drive the denaturation reaction stirring shaft (35) to stir the cassava starch mixture, after the cassava starch mixture and the denaturation reaction material are added, perform a denaturation reaction under heating conditions, irradiate for 10 minutes to 30 minutes after the reaction is completed, turn off the irradiation lamp (312), then cool and store for 1 to 2 hours, discharge the denatured cassava starch mixture from the discharge port (34) of the denaturation reaction kettle (30), and then dry and grind to obtain a finished cassava denatured starch product.

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