Microwave-assisted device for rapidly preparing short amylose

Abstract

The utility model discloses a microwave-assisted device for rapidly preparing short amylose, and belongs to the technical field of short amylose preparation. The device consists of a microwave transmitting device, a three-port distillation flask, a temperature monitoring probe, a temperature monitor, a stirring motor, a stirring rod, stirring blades, a spherical condenser pipe and a glass pipe with a ground opening, the three-port distillation flask is arranged inside the microwave transmitting device, and the stirring motor is arranged above the outside of the microwave transmitting device; according to the microwave-assisted device for rapidly preparing the short amylose, the microwave radiation effect, the heating time, a temperature detector and a mechanical stirring instrument can be combined for use, parameters of the microwave radiation effect, the heating time, the temperature detector and the mechanical stirring instrument can be regulated and controlled, and a target temperature can be rapidly reached and a starch raw material in a three-port distillation flask can be uniformly heated in a microwave-assisted manner; furthermore, the effect of fully digesting is realized, and the internal reaction is more efficiently completed. And meanwhile, a transparent box door arranged on the microwave transmitting device realizes visual monitoring of the reaction process.

Description

TECHNICAL FIELD

[0001] The utility model belongs to short straight chain starch preparation technical field, concretely relates to a kind of microwave auxiliary device for quickly preparing short straight chain starch. BACKGROUND

[0002] Short straight chain starch has the characteristics of wide raw material sources, low cost, renewable, high biocompatibility and good biodegradability, and has been widely used in chemical industry, food and medicine and other fields. Commonly used short straight chain starch preparation methods include acid hydrolysis, enzymatic hydrolysis, precipitation method, etc. However, the operation conditions are usually strictly required in the process of preparing short straight chain starch, especially the temperature and time need to be accurately controlled to avoid excessive degradation of starch. In addition, the temperature and stirring speed need to be manually adjusted in the traditional device, and the operation steps are complex.

[0003] The above-mentioned traditional short straight chain starch preparation process has the disadvantages of low efficiency, long time consumption, slow heating speed, complex operation, high energy consumption and inaccurate reaction temperature control, thereby increasing the preparation cost and reducing the utilization efficiency of raw materials. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a kind of microwave auxiliary device for quickly preparing short straight chain starch. The utility model utilizes microwave-assisted method to quickly heat the starch suspension, improve the reaction efficiency, avoid the problem of uneven heating, and has the advantages of simple operation, fast and efficient, less reagent consumption and low energy consumption, thereby obtaining short straight chain starch with high purity.

[0005] The technical scheme of the utility model is as follows:

[0006] A microwave-assisted device for quickly preparing short straight chain starch is composed of a microwave emission device, a three-port distillation flask, a temperature monitoring probe, a temperature monitor, a stirring motor, a stirring rod, stirring blades, a spherical condenser and a glass tube with a ground opening. The three-port distillation flask is placed inside the microwave emission device, the stirring motor is placed above the outside of the microwave emission device, the extension tube of the output shaft of the stirring motor is connected to the rear end of the stirring rod, and the front end of the stirring rod is connected to the stirring blades. The front end of the temperature monitoring probe and the front end of the stirring rod are respectively inserted into the liquid surface of the three-port distillation flask through the first port and the second port of the three-port distillation flask and are sealedly installed between the three-port distillation flask, and the glass tube with a ground opening is inserted into the three-port distillation flask through the third port of the three-port distillation flask and is sealedly installed between the three-port distillation flask. The rear end of the temperature monitoring probe is connected to the temperature monitor located outside the microwave emission device through a connecting line. The glass tube with a ground opening is connected to the spherical condenser located outside the microwave emission device, and the spherical condenser has a lower water inlet and an upper water outlet.

[0007] Further, three openings are arranged on the upper part of the microwave emitting device, and a first copper pipe, a second copper pipe and a third copper pipe are arranged in the openings respectively, and the connecting line of the temperature monitor and the temperature monitoring probe, the stirring rod and the glass pipe with a ground opening pass through the first copper pipe, the second copper pipe and the third copper pipe respectively.

[0008] Further, a transparent box door is arranged on the middle of the front surface of the microwave emitting device, and a handle is arranged on the transparent box door; and a microwave emission control system is arranged on the right side of the front surface of the microwave emitting device.

[0009] Further, a lifting platform that can move up and down is arranged in the microwave emitting device, and the lower panel of the lifting platform is fixedly arranged on the bottom of the inner side of the microwave emitting device, and the upper panel of the lifting platform is arranged with the three-port distillation bottle.

[0010] Further, the outer diameter of the glass pipe with a ground opening is matched with the inner diameter of the port of the three-port distillation bottle, and cold water in the spherical condenser pipe is introduced from the lower inlet and discharged from the upper outlet.

[0011] Further, the stirring motor is provided with a stirring switch and a rotating speed control knob.

[0012] Compared with the prior art, the microwave auxiliary device for rapidly preparing short straight chain starch has the following beneficial effects:

[0013] The microwave auxiliary device for rapidly preparing short straight chain starch can combine the microwave radiation effect, the heating time, the temperature detector and the mechanical stirring instrument and control the parameters, can rapidly reach the target temperature through the microwave auxiliary mode, can uniformly heat the starch raw material in the three-port distillation bottle, and can realize the full digestion effect, so that the internal reaction is more efficient. Meanwhile, the transparent box door arranged on the microwave emitting device realizes the visual monitoring of the reaction process.

[0014] The microwave auxiliary device for rapidly preparing short straight chain starch can combine the microwave radiation effect, the heating time, the temperature detector and the mechanical stirring instrument and control the parameters, can rapidly reach the target temperature through the microwave auxiliary mode, can uniformly heat the starch raw material in the three-port distillation bottle, and can realize the full digestion effect, so that the internal reaction is more efficient. Meanwhile, the transparent box door arranged on the microwave emitting device realizes the visual monitoring of the reaction process. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the whole structure of the microwave auxiliary device;

[0016] Figure 2 It is an FT-IR comparison diagram of the original starch and the short straight chain starch;

[0017] Figure 3The left side is the purple complex formed by the original starch and the iodine solution, and the right side is the blue-black complex formed by the short straight chain starch and the iodine solution;

[0018] Figure 1 The names of the parts in the middle are: microwave emitting device 1, box door handle 2, transparent box door 3, microwave emission control system 4, temperature monitoring probe 5, temperature monitor 6, stirring motor 7, stirring switch and speed control knob 8, stirring rod 9, stirring blade 10, spherical condenser 11, glass tube with ground joint 12, three-port distillation flask 13, lifting platform 14, first copper pipe 15, second copper pipe 16, third copper pipe 17, upper water outlet 18, lower water inlet 19.

[0019] The model of the microwave emitting device is P70F20CN3P-SR(W0) microwave emitting device, the model of the temperature detection probe is PT100 temperature probe, the model of the temperature detector is TY-WD-1 intelligent temperature controller, the model of the stirring motor is JHS-2160 constant speed digital stirrer, and the three-port distillation flask 13 has a capacity of 1L and a port inner diameter of 24mm. DETAILED DESCRIPTION

[0020] Example 1

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] As Figure 1The utility model provides a kind of microwave auxiliary device for quickly preparing short amylose, by microwave transmitting device 1, three-port distilling flask 13, temperature monitoring probe 5, temperature monitor 6, stirring motor 7, stirring rod 9, stirring blade 10, spherical condenser tube 11, glass tube 12 with mouth are constituted;Three-port distilling flask 13 is placed in the inside of microwave transmitting device 1;Stirring motor 7 is placed above the outside of microwave transmitting device 1, the extension pipe of the output shaft of stirring motor 7 is connected the rear end of stirring rod 9, and the front end of stirring rod 9 is connected stirring blade 10;The front end of temperature monitoring probe 5 and the front end of stirring rod 9 respectively extend into the liquid level of three-port distilling flask 13 through the first port and the second port of three-port distilling flask 13 and are sealedly installed between three-port distilling flask 13, and glass tube 12 with mouth is extended into three-port distilling flask 13 through the third port of three-port distilling flask 13 and is sealedly installed between three-port distilling flask 13;The rear end of temperature monitoring probe 5 is connected temperature monitor 6 located in the outside of microwave transmitting device 1;Glass tube 12 with mouth is connected spherical condenser tube 11 located in the outside of microwave transmitting device, and spherical condenser tube 11 has lower end water inlet 19 and upper end water outlet 18.In the upper portion of microwave transmitting device 1 is provided with three openings, and first copper pipe 15, second copper pipe 16 and third copper pipe 17 of integral structure with microwave transmitting device 1 are placed respectively, and the connecting line of temperature monitor 6 and temperature monitoring probe 5, stirring rod 9, glass tube 12 with mouth respectively pass through first copper pipe 15, second copper pipe 16 and third copper pipe 17.

[0023] A transparent box door 3 is arranged in the middle of the front side surface of microwave transmitting device 1, and a handle 2 is arranged on the transparent box door 3;A microwave emission control system 4 is arranged on the right side of the front side surface of microwave transmitting device 1;A lifting platform 14 that can move up and down is arranged in the inside of microwave transmitting device, and the lower panel of the lifting platform 14 is fixedly installed on the bottom of the inside of microwave transmitting device 1, and the upper panel of the lifting platform 14 places three-port distilling flask 13;Cold water in spherical condenser tube 11 is introduced from lower end water inlet 19 and discharged from upper end water outlet 18;Stirring switch and speed control knob 8 are arranged on stirring motor 7.

[0024] When the three-port distilling flask 13 containing starch (starch mass 50g, m 淀粉 :v 溶剂 =1:15~30) and solvent (v 水 :v 盐酸 =4~5:1, C 盐酸When the three-port distillation flask 13 containing starch (10-15 mol / L) and distilled water (10-15 mol / L) is placed on the lifting platform 14, the rotation speed control knob 8 of the stirring motor is adjusted, and the parameters of the microwave emission control system 4 on the right side of the microwave emission device 1 are set to control the output power of the microwave emission device 1. Then the stirring motor 7 drives the stirring rod 9 to rotate through the extension pipe of the output shaft, and the stirring rod 9 drives the stirring blades 10 in the three-port distillation flask 13 to fully stir the starch and distilled water, so that the raw materials are uniformly mixed. At the same time, the temperature monitoring probe 5 inserted into the three-port distillation flask 13 can measure the internal temperature of the reaction system in real time and feed back the measurement results to the temperature monitor 6. Through the transparent box door 3 with the handle 2, the reaction dynamics in the three-port distillation flask 13 can be observed in real time from the outside, so that the starch raw materials in the three-port distillation flask 13 are uniformly heated, the heating efficiency is optimized, the reaction efficiency is improved, the preparation time of short straight chain starch is shortened, and the energy consumption of the reaction is saved. Through infrared spectrum (FT-IR) test, 2 mg of sample is mixed with 200 mg of dry potassium bromide (KBr). Grind in a mortar to mix the sample and KBr uniformly. Put the mixture into a tablet press mold and press into a transparent sheet with a tablet press. Put the tablet into a sample holder and start the instrument to scan and record the infrared spectrum of the sample. Figure 2 As shown, the molecular structure is confirmed by infrared spectrum. The original starch has a wide O-H stretching vibration peak in the range of 3200-3600 cm-1, which is the characteristic peak of the hydroxyl group in starch. The intensity and shape of the O-H stretching vibration peak of short straight chain starch may change slightly, because the molecular chain of short straight chain starch is short, and the hydrogen bonding of hydroxyl group may be weakened, resulting in a narrow peak shape. The original starch and short straight chain starch have characteristic peaks of α-1,4-glucosidic bond near 936 cm-1 and 862 cm-1, and the intensity of these peaks may change slightly compared with the original starch, but the position remains basically unchanged. The original starch and short straight chain starch have multiple peaks in the range of 1000-1200 cm-1, mainly from C-O-C (glycosidic bond) and C-O-H vibration peaks. The intensity of short straight chain starch C-O-C vibration peak may change slightly, and the peak shape may be more sharp. Using iodine color reaction, 100 mg of original starch and short straight chain starch are respectively dispersed in 5 mL of water, 1 mL of 0.1 mg / mL iodine solution is added to the test tube, shaken, and then the color change of the solution in the test tube is observed. The chain length can be preliminarily judged from the color of the complex, and the results are shown in Figure 3 As shown, the original starch forms a purple complex with iodine, and the short straight chain starch forms a blue-black complex with iodine.

[0025] The glass tube 12 with a grinding mouth, the stirring rod 9 and the temperature monitoring probe 5 inside the microwave emitting device 1 can not only be connected with the external spherical condensing tube 11, the stirring motor 7 and the temperature detector 6 through the third copper pipe 17, the second copper pipe 16 and the first copper pipe 15, but also can effectively avoid environmental pollution caused by microwave leakage, maximize the utilization of microwaves and realize the effect of sufficient digestion, so that the internal reaction is more efficient.

[0026] The working principle of the utility model is: when the microwave auxiliary device for preparing short straight chain amylose is used, first, the switches of all the electric appliances in the device are opened, tap water is introduced into the water inlet 19 at the lower end of the spherical condensing tube 11 and discharged from the water outlet 18 at the upper end, the solvent (a mixture of distilled water and hydrochloric acid) evaporated from the three-port distillation flask 13 is condensed and returned to the three-port distillation flask 13 through the glass tube 12 with a grinding mouth, the volatile acid is prevented from escaping, the loss of the solvent is avoided, and the reaction efficiency is improved.

[0027] The stirring speed (280-300 rpm) of the stirring rod 9 is controlled by adjusting the rotating speed control knob 8 of the stirring motor 7, so that the stirring blade 10 is rotated to fully stir the starch suspension in the three-port distillation flask 13, the microwave emitting control system 4 parameters are adjusted to control the radiation microwave intensity (100-400 W), the reaction time (4-5 h) and the temperature (35-40 DEG C), the temperature in the reaction system is monitored in real time by the temperature detector 6, so that the reaction system in the three-port distillation flask 13 is heated uniformly, the heating efficiency is optimized, and the reaction can be fully and efficiently carried out.

[0028] The above embodiments are only used to illustrate the technical scheme of the utility model, and do not represent the protection scope of the utility model, although the utility model is described in detail with reference to the above embodiments, those skilled in the art should understand that the technical scheme illustrated by the above embodiments can be modified, or some technical features can be replaced or adjusted, and meanwhile, the essence and scope of the technical scheme of the utility model are not exceeded.

Claims

1. A microwave-assisted device for rapid preparation of short chain amylopectin, characterized by: The microwave emitting device (1), the three-port distillation bottle (13), the temperature monitoring probe (5), the temperature monitor (6), the stirring motor (7), the stirring rod (9), the stirring blade (10), the spherical condenser tube (11), and the glass tube with a grinding mouth (12) are composed; the three-port distillation bottle (13) is placed in the interior of the microwave emitting device (1), the stirring motor (7) is placed above the exterior of the microwave emitting device (1), the extension pipe of the output shaft of the stirring motor (7) is connected with the rear end of the stirring rod (9), and the front end of the stirring rod (9) is connected with the stirring blade (10); the front end of the temperature monitoring probe (5) and the front end of the stirring rod (9) respectively extend into the liquid surface of the three-port distillation bottle (13) through the first port and the second port of the three-port distillation bottle (13) and are sealedly installed between the three-port distillation bottle (13), the glass tube with a grinding mouth (12) extends into the three-port distillation bottle (13) through the third port of the three-port distillation bottle (13) and is sealedly installed between the three-port distillation bottle (13); the rear end of the temperature monitoring probe (5) is connected with the temperature monitor (6) located outside the microwave emitting device (1) through a connecting line; the glass tube with a grinding mouth (12) is connected with the spherical condenser tube (11) located outside the microwave emitting device (1), and the spherical condenser tube (11) is provided with a lower end water inlet (19) and an upper end water outlet (18).

2. A microwave assisted device for rapid preparation of short chain amylopectin as claimed in claim 1, wherein: Three openings are arranged on the upper portion of the microwave emitting device (1), and the first copper pipe (15), the second copper pipe (16), and the third copper pipe (17) which are integrated with the microwave emitting device (1) are arranged in the openings, respectively; the connecting line of the temperature monitor (6) and the temperature monitoring probe (5), the stirring rod (9), and the glass tube with a grinding mouth (12) pass through the first copper pipe (15), the second copper pipe (16), and the third copper pipe (17), respectively.

3. A microwave assisted device for rapid preparation of short chain amylopectin as claimed in claim 1, wherein: A transparent box door (3) is arranged in the middle of the front side surface of the microwave emitting device (1), and a handle (2) is arranged on the transparent box door (3); a microwave emission control system (4) is arranged on the right side of the front side surface of the microwave emitting device (1).

4. A microwave assisted device for rapid preparation of short chain amylopectin as claimed in claim 1, wherein: A lifting platform (14) which can move up and down is arranged in the microwave emitting device (1), the lower panel of the lifting platform (14) is fixedly installed on the bottom of the inner side of the microwave emitting device (1), and the upper panel of the lifting platform (14) places the three-port distillation bottle (13).

5. A microwave assisted device for rapid preparation of short chain amylopectin as claimed in claim 1, wherein: The outer diameter of the glass tube with a grinding mouth (12) matches the inner diameter of the port of the three-port distillation bottle (13), and the cold water in the spherical condenser tube (11) is introduced from the lower end water inlet (19) and discharged from the upper end water outlet (18).

6. A microwave assisted device for rapid preparation of short chain amylopectin as claimed in claim 1, wherein: The stirring switch and the rotating speed control knob (8) are arranged on the stirring motor (7).

Images