CN110003347B

CN110003347B - Processing technology and processing equipment for modified starch binder

Info

Publication number: CN110003347B
Application number: CN201910335215.1A
Authority: CN
Inventors: 彭君建; 范天铭; 张贵阳; 乔艳娜; 高健
Original assignee: Jiangsu Famsun Intelligent Technology Co Ltd
Current assignee: Jiangsu Famsun Intelligent Technology Co Ltd
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2022-03-18
Anticipated expiration: 2039-04-24
Also published as: CN110003347A

Abstract

The invention belongs to the technical field of modified starch binders, and particularly relates to a processing technology of a modified starch binder, which comprises the following steps: (1) removing; (2) pre-tempering; (3) removing the blank and extracting the blank; (4) primary crushing; (5) primary mixing; (6) quenching and tempering, puffing and cooling; (7) and (4) combining and crushing. The invention also relates to modified starch binder processing equipment which comprises a cleaning and metering device, a pre-conditioning device, an embryo removing and extracting device, a primary crushing and mixing device, a conditioning and puffing cooling device and a combined crushing device which are sequentially connected. The invention effectively solves the problem of industrialized continuous production of modified starch through process innovation, can produce modified starch binders with different requirements through formula and process adjustment, and can be applied to industries such as food, medicine, chemical industry, feed, casting, petroleum drilling, textile, paper making and the like.

Description

Processing technology and processing equipment for modified starch binder

Technical Field

The invention relates to the technical field of starch binder processing, in particular to a processing technology and equipment for an extrusion-expansion modified starch binder.

Background

With the development of industry and science and technology, the demand of synthetic polymer materials using non-renewable resources such as petroleum and coal as main raw materials is increasing in industry and life, but with the increasing exhaustion of these non-renewable resources and the environmental pollution caused by the difficult degradation of synthetic polymer materials, the synthetic polymer materials are becoming the focus of social attention, and in the field of binders, the development of starch binders has been promoted in the industry for the purpose of reducing production costs and protecting the environment. Starch is a natural, environment-friendly and renewable resource, and because the application of starch in industry is restricted by a plurality of inherent properties (cold water insolubility, paste instability under the action of acid, heat and shearing and the like) of raw starch, in order to improve the performance of starch and expand the application range of starch, modified starch can be prepared by processing methods such as physics, chemistry, enzyme and the like, the natural property of starch is changed, the functionality of starch is increased or new characteristics are introduced, so that the requirement of industrial development is met. The pre-gelatinized starch is physically modified starch, and after the starch is gelatinized into a dispersed state, the starch is quickly dehydrated and dried, and starch molecules are not rearranged to obtain porous starch granules without obvious crystallization. Because the modified starch has porous and hydrogen bond fracture structure, compared with the original starch, the modified starch has the characteristics of high dispersibility, high oil absorption, high hydration speed, high viscosity, high expansibility and the like. Pregelatinized starch has been widely used in the industries of food, medicine, chemical industry, feed, casting, oil drilling, textile, paper making and the like.

The preparation and application of the patent CN1149069A puffed corn starch binder briefly describe the process flow and the typical formula of the puffed corn as the binder applied in various industries, and the patent does not relate to the aspects of production process, equipment configuration and process parameters; in the method for preparing starch for casting in patent CN1974056A, the method of heating and curing is adopted for obtaining the organic gelatinized starch, and large-scale industrial continuous production is not used; the patent CN102400383A textile sizing agent only discloses a formula and application effect of the textile sizing agent, and does not relate to a preparation process of a binder; the patent CN 10305977B starch adhesive, the preparation method and the application thereof, the preparation of the starch adhesive adopts adding oxidant into starch, oxidizing and breaking the chain of the starch in the starch slurry to produce starch chain segment and make the starch segment contain carboxyl under the alkaline condition, the method uses the extrusion and expansion preparation method of the invention to be different; in CN103351684A, a formula of puffed corn used as one of the components of interior wall putty is mentioned, and the patent does not relate to the processing technology and equipment configuration of puffed corn; CN103897629A A puffed starch adhesive, wherein puffed corn is used as one of the formulas of the adhesive, and the preparation of the puffed corn in the patent comprises the following steps: peeling clean corn, crushing the corn residue, extracting embryo, preparing corn particles, puffing the corn particles, crushing the puffed corn particles, sieving the puffed corn particles to obtain puffed corn starch, wherein equipment configuration and process parameter control are not involved in the patent, and the puffing mode is not clarified, and the puffing mode is screw extrusion type puffing or airflow puffing. The CN106085289A environment-friendly corrugated board low-temperature laminating starch adhesive and the preparation method thereof are different from the preparation method of the invention in that starch is oxidized by an oxidant to improve initial viscosity. CN106220788A A modified starch adhesive and a preparation method thereof, wherein the modified starch is esterified starch. CN 106590468B high-temperature curing type esterified modified cassava starch adhesive and a preparation method thereof, a high-temperature curing method is adopted for curing.

Disclosure of Invention

In order to overcome the defects of the prior art and meet the requirements of industrial production, the processing technology and the processing equipment of the modified starch binder, which are designed by the invention, effectively solve the problem of industrial continuous production of modified starch through technological innovation, can produce the modified starch binders with different requirements through formula and technological adjustment, and can be applied to the industries of food, medicine, chemical industry, feed, casting, oil drilling, textile, paper making and the like.

The first purpose of the invention is to provide a modified starch binder processing technology, which comprises the following steps:

(1) removing: cleaning the magazines in the material;

(2) pre-tempering: preliminarily mixing the material obtained in the step (1) with water to obtain a water-absorbing material, uniformly distributing water in the water-absorbing material, heating the water-absorbing material, adding water for tempering, and softening germs;

(3) removing the blank and extracting the blank: degerming the material obtained in the step (2), separating corn endosperm from embryo, and sucking the endosperm into skin by grade; the material containing the germ is subjected to skin absorption, embryo rolling and sieving classification to separate the material containing the germ, and the material containing the germ is subjected to air suction to separate pure germ;

(4) primary crushing; crushing the endosperm obtained in the step (3) by a hammer mill to form starch,

(5) primary mixing; mixing the starch obtained in the step (4) with other starch sources, and further adjusting the proportion of amylose to amylopectin in the starch;

(6) quenching and tempering, puffing and cooling: the mixed material in the step (5) enters a conditioner for conditioning, wherein the conditioner adopts a combined structure of a single-layer conditioner and a DDC conditioner, and the conditioned material enters a bulking machine for extrusion and bulking and then is cooled;

(7) combining and crushing: and (4) coarsely crushing the cooled material in the step (6) by using a hammer crusher, feeding the coarsely crushed material into an ultrafine crusher, screening the material with different granularities by variable-frequency wind speed, and crushing the material until 90% (mass percentage) of the material passes through 80-120 meshes to obtain the modified expanded starch.

Preferably, the water-absorbing material heated in the step (2) adopts a direct steam heating method of 0.2-0.4 mPa;

the water temperature for tempering by adding water is 10-15 ℃, and the water adding amount is 1-2% of the mass of the pure grain;

the tempering temperature is 50-70 ℃, the tempering time is 8 hours, and the mass percentage of water after tempering is 14-15%;

removing germs and peels: the rejection rate is 85% (mass percent);

the water content (mass percent) of the endosperm is 13-15%, and the granularity of the endosperm is 50-60% (mass percent) and is 8-12 meshes.

Preferably, the tempering temperature of the tempering and puffing in the step (6) is 90-95 ℃, and the tempering time is 90-120 s;

in the step (6), the frequency of the puffing machine is 45-65 HZ, the temperature of a discharging cavity of the puffing machine is 110-125 ℃, and the water content at an outlet of the puffing machine is 11-12% (by mass);

the mass percentage of water in the cooled expanded starch in the step (6) is controlled to be 7-10%, and the temperature of the cooled material is not higher than the ambient temperature by 5 ℃;

and (7) the diameter phi of a screen of the hammer mill is 2.0-2.5 mm.

Preferably, the gelatinization degree level of the modified expanded starch is 80-85%, and the viscosity coefficient is 6.77-8.25 mpa.s.

The second purpose of the invention is to provide modified starch binder processing equipment, which comprises a cleaning and metering device, a pre-conditioning device, an embryo removing and extracting device, a primary crushing and mixing device, a conditioning, puffing and cooling device and a combined crushing device; the cleaning and metering device, the pre-tempering device, the blank removing and lifting device, the primary crushing and mixing device, the tempering and puffing cooling device and the combined crushing device are sequentially connected.

Preferably, the primary cleaning metering device comprises a feeding port, a scraper conveyor, a first elevator, a first temporary storage bin, a first magnetic separator, a vibration grading sieve, a circulating air separator, a second magnetic separator, a stone remover, a flow scale and a second temporary storage bin;

the vibration classifying screen is provided with a vertical air suction duct, a first magnetic separator is arranged at a feed port of the vibration classifying screen, and a circulating air separator is arranged at a discharge port of the vibration classifying screen;

the stone remover is provided with a second magnetic separator; the flow scale is connected with the second temporary storage bin;

the first temporary storage bin, the circulating air separator and the stone remover are respectively connected with a dust removal air net;

the magnetic separator adopts a permanent magnetic cylinder and is used for removing magnetic impurities in the materials;

the stone remover and the vibration grading screen are both provided with low-pressure air nets;

the materials enter a scraper conveyor from a feeding port, are lifted to a first temporary storage bin through a first elevator, enter a stone remover through a first magnetic separator, a vibration grading sieve, a circulating air separator and a second magnetic separator, and then enter a second temporary storage bin after being weighed and measured by a flow scale.

Preferably, the pre-conditioning device comprises a dampening machine and a conditioning bin;

the dampening machine is connected with the primary cleaning metering device through a second hoisting machine; the dampening machine is connected with the conditioning bin through the round pipe auger, the steam pipeline heats the round pipe auger, and the conditioning bin is connected with the collecting auger.

Preferably, the embryo removing and extracting device comprises a kneading third temporary storage bin, an embryo removing machine and an embryo rolling mill;

the third temporary storage bin is connected with the pre-conditioning device through a third elevator; the third temporary storage bin is connected with the kneading and degerming machine through the material distribution auger, the kneading and degerming machine is connected with the first air suction separator through the first high square sieve, and the first air suction separator is connected with the fourth hoister through the second scraper conveyor;

the fourth elevator is connected with the fourth temporary storage bin, the top of the fourth temporary storage bin is provided with a third magnetic separator, the fourth temporary storage bin is connected with a blank mill through a packing auger, the blank mill is connected with a second air suction separator through a second high square screen, and the second air suction separator 3-25 is connected with a fifth elevator through a third scraper conveyor;

the fifth hoister is respectively connected with a plurality of third square gauzes through distributors, and the square gauzes are connected with the sixth hoister through endosperm collecting scrapers;

the primary crushing and mixing device comprises a hammer crusher and a mixer;

a stone removing feeder is arranged on the hammer piece crusher and receives materials in a bin to be crushed, and the bin to be crushed is connected with a blank removing and lifting device through a fourth magnetic separator and a seventh lifting machine; the hammer piece crusher is connected with the mixer through a seventh elevator, a fifth magnetic separator and a proportioning bin.

Preferably, the quenching and tempering, puffing and cooling device comprises a quenching and tempering device, a puffing machine and a cooler; the conditioner is connected with the cooler through a bulking machine;

the conditioner adopts a combined structure of a single-layer conditioner and a DDC conditioner, and a feeder is arranged on the conditioner; the bin to be puffed is connected with a mixing device of the primary crushing and mixing device through a distributor, a sixth magnetic separator and an eighth hoisting machine, and the material in the bin to be puffed enters the feeder through the first arch breaking feeding bin;

a dust remover is arranged on a pipeline between the distributor and the sixth magnetic separator;

the bulking machine adopts a double-screw bulking machine, wherein the length-diameter ratio of the double-screw bulking machine is 16: 1-20: 1.

preferably, the combined crushing device comprises a hammer crusher and an ultrafine crusher;

the hammer crusher is connected with a cooling device of the quenching and tempering puffing cooling device through a packing auger;

the hammer crusher is connected with the bin to be crushed through a material sealing auger, a ninth elevator, a distributor and a seventh magnetic separator;

and a second arch breaking feeding bin is arranged on the crushing bin, and the ultrafine crusher receives the material of the second arch breaking feeding bin.

The invention relates to a modified starch binder processing technology and equipment, wherein the technology comprises a primary cleaning and metering section, a pre-tempering section, a blank-removing and blank-extracting section, a primary crushing section, a primary mixing section, a tempering and puffing cooling section, a combined crushing section, a secondary mixing section, a packaging section and other auxiliary functions.

The working principle of the invention is that starch sources of corn, wheat, sorghum and the like which are raw materials enter a scraper conveyor from a feeding port, are lifted to a temporary storage bin by a lifter, and enter a primary cleaning section through an electric gate, wherein the primary cleaning section mainly comprises a magnetic separator, a vibration grading sieve, a wind separator, a stone remover and the like.

The efficient vibrating screen is used for cleaning large impurities and small impurities which may be contained in grains, and is matched with a vertical air suction duct to clean light impurities such as dust and the like in the grains. The magnetic separator adopts the permanent magnetic cylinder, is convenient to maintain, can remove iron chips, screws and other magnetic impurities possibly contained in grains, and can protect the high-speed rotating equipment degerming machine.

The stone remover is used for removing heavy impurities which are possibly contained in grains and have stones and the like and have larger specific gravity than corns, and the stone remover is provided with a low-pressure air net and can remove a part of dust and other light impurities which have smaller specific gravity in the grains.

And (3) metering after a primary cleaning working section, wherein the starch source raw materials are mainly conveyed into a metering scale for weighing and metering. The flow scale is used for measuring the processing amount of grains, and is convenient for production, operation and management.

The dust removal air net is used for removing impurities such as dust, light impurities and the like in grains, so that the dust content of air discharged into the atmosphere is not overproof, and the atmospheric environment is protected.

The measured starch source raw materials enter a front tempering work section, the work section mainly comprises a dampening machine, a round pipe auger, a gate and a tempering bin, wherein the dampening machine is connected with a tap water pipeline, the raw materials and water are preliminarily mixed in the dampening machine, the water content in the raw materials is regulated, the water content is stabilized at the same time, the water content in the raw materials is uniform, the dampened raw materials enter the round pipe auger, the round pipe auger is connected with a steam pipeline, the dampened materials are lifted to a certain temperature through steam and then enter the tempering bin through the gate, the capacity of the tempering bin is large, cleaned clean grains are subjected to tempering by adding 1-2% (mass percent) of water into the clean grains through the computer dampening machine and enter the tempering bin for tempering, the tempering time is 8 hours, the aim is to soften germs, the germs are ensured not to be broken in the germ removing and embryo lifting processes, and the yield of the germs is improved.

Then entering the next degerming and embryo-extracting working section. Adopting the process of degerming → sifting classification → grade suction skin → rolling → sifting → suction skin → packaging. The degerming machine processes the clean grain from the cleaning section to separate corn endosperm from embryo. The high square flat screen grades the material processed by the degerming machine, the endosperm enters an endosperm collecting scraper plate after grade skin absorption to enter a next working section for processing, the material containing the germ enters an embryo rolling machine for embryo rolling after the skin absorption, and then enters the next high square screen for screening and grading, the material containing the germ is separated, and the material containing the germ is subjected to air suction to separate pure germ.

The endosperm enters a primary crushing section through a lifter, and is formed by a magnetic separator, a temporary storage bin and a hammer crusher pulse dust collector in the primary crushing section, the endosperm is crushed by the hammer crusher to form starch, and then enters a primary mixing section, the starch is mixed with other starch source cassava flour and the like in the primary mixing section, and the proportion of amylose to amylopectin in the starch and the requirements for different starches in different formulas are mainly adjusted.

The mixed starch enters a quenching and tempering and puffing cooling section through a lifter, the section mainly comprises a magnetic separator, an arch breaking feeding bin, a feeder, a quenching and tempering device, a puffing machine, a cooler and the like, the magnetic separator is additionally arranged in the section, and the phenomenon that metal in the material enters the puffing machine to damage the puffing machine and influence the normal operation of production is avoided. An arch breaking feeding bin is additionally arranged at the working section, so that the starch arch is effectively avoided, and the production continuity is ensured.

The material enters a feeder through an arch breaking feeding bin, and the feeder adopts variable frequency speed regulation to control the feeding amount. And then, the starch enters a conditioner, and a combined scheme of a single-layer conditioner and a DDC conditioner is adopted in the invention, so that the conditioning time of the starch is prolonged, and the conditioning time is 90-120S.

The material after the tempering enters an extrusion machine for extrusion and expansion treatment, the material is sent into the extrusion machine, and under the pushing action of the screw, the material moves forwards in an axial direction. Meanwhile, due to the mechanical friction action between the screw and the material, between the material and the puffing cavity and inside the material, the material is strongly extruded, stirred and sheared, and as a result, the material is further refined and homogenized. Along with the gradual increase of the pressure in the machine cavity, the temperature is correspondingly and continuously increased, the physical properties of the materials are changed under the conditions of high temperature, high pressure and high shearing force, the materials are changed into paste from powder, and the starch is gelatinized, cracked and recombined. At the moment when the pasty material is sprayed out from the die hole, under the action of strong pressure difference, the water is quickly vaporized, and the material is puffed to form a puffed starch product with a loose, porous and crisp structure, so that the purpose of extrusion puffing is achieved.

The expanded starch enters a cooler through an air seal machine, a hydraulic flap plate cooler is adopted, the water content of the expanded starch is 7-10% (mass percentage) after cooling, and the material temperature is not higher than the ambient temperature by 5 ℃. The cooled materials enter a combined crushing section, the materials are firstly coarsely crushed by a hammer crusher, the diameter of a screen mesh is phi 2.0-2.5 mm, the coarsely crushed materials enter a temporary storage bin through a lifting machine and then enter an ultrafine crusher through a gate, the ultrafine crusher screens the materials with different particle sizes through wind speed, and the materials can be crushed to 90% (mass percentage) and pass through 80-120 meshes; the ultramicro materials enter a high square sieve through a pneumatic conveying system, the materials reaching the crushing granularity enter a temporary storage bin, and the materials not reaching the granularity requirement return to the ultramicro powder again for crushing.

And then the material enters a secondary mixing section, the qualified modified expanded starch is mixed with other component materials in the secondary mixing section according to a proportion, and the mixed material enters a lifting machine and enters a packing bin for packing.

The invention is provided with a plurality of sets of air nets, a set of stone removing machine air net for primary cleaning and metering workshop section, two sets of air suction and separation air nets for blank stripping and blank lifting workshop section, a set of bulking machine steam treatment system for tempering and bulking cooling workshop section and a set of dust removal air net for process flow.

The vibrating screen and the stoner need low-pressure wind power assistance during working, so that materials can be in a suspension state on a screen of the stoner, the stones with large specific gravity and corns with small specific gravity form a certain layer, the stones with large specific gravity move upwards under the action of upward power of the screen of the stoner, and the corns with small specific gravity move downwards under the action of wind power, so that the stones and the corns are separated. In the working process of the stone remover, a part of dust and light impurities are separated under the action of wind power. The classifying screen can realize the separation between larger materials and slight impurities by means of wind power in the processing process, and achieves the corresponding technological requirements.

The hoister, the auger, the vibrating screen, the packing scale and the like easily generate dust in the working process, so that the leakage of the dust is avoided in the whole production process, and the occurrence of dangerous accidents of dust explosion is avoided. The dust removal air net is arranged to avoid dust overflow, so that the workshop environment is ensured, and the finished product quality and the health of workers are facilitated.

The invention adopts a group of high-pressure air nets. In the whole processing process, partial working sections and partial equipment need to be conveyed by means of wind power, a TY-series efficient high-pressure fan, a strong negative pressure wind with material, a cyclone and an air seal machine are selected to suck and discharge materials, and the material pushing principle is adopted to realize the purpose of wind transportation, and no dust exists, so that a production workshop is sanitary and clean. And a steam absorption system of the puffing section is also used for on-site steam treatment.

The material flow circulating system mainly comprises a control circulating system for crushing granularity, and materials which do not reach the granularity requirement enter the ultrafine grinder again for crushing.

The invention has the following advantages:

the vertical type grain cleaning machine has the advantages that the magnetic separator, the vibration grading sieve, the winnowing machine, the stone removing machine and the like are mainly arranged at the primary cleaning section, the high-efficiency vibration sieve is used for cleaning large impurities and small impurities which can be contained in grains, and the vertical type grain cleaning machine is matched with the vertical air suction duct to clean light impurities such as dust in the grains. The magnetic separator adopts the permanent magnetic cylinder, is convenient to maintain, can remove iron chips, screws and other magnetic impurities possibly contained in grains, and can protect the high-speed rotating equipment degerming machine. The stone remover is used for removing heavy impurities which are possibly contained in grains and have stones and the like and have larger specific gravity than corns, and the stone remover is provided with a low-pressure air net and can remove a part of dust and other light impurities which have smaller specific gravity in the grains.

The device has the advantages that the device is provided with a metering workshop section, and is mainly used for weighing and metering starch source raw materials and convenient for production, operation and management.

The conditioning method has the advantages that a pre-conditioning working section is arranged, the working section mainly comprises a dampening machine, a round pipe auger, a gate and a soaking bin, the dampening machine is connected with a tap water pipeline, raw materials and water are preliminarily mixed in the dampening machine, the water content in the raw materials is regulated, the water content is stabilized at the same time, the water content in the raw materials is uniform, the dampened raw materials enter the round pipe auger, the round pipe auger is connected with a steam pipeline, the dampened materials are raised to a certain temperature through steam and then enter the conditioning bin through the gate, the capacity of the conditioning bin is large, cleaned clean grains are conditioned by adding 1-2% (mass percent) of water to the clean grains through the computer dampening machine and enter the conditioning bin for conditioning, the conditioning time is 8 hours, the purpose is to soften the germs, the germs are guaranteed not to be broken in the germ removing and embryo lifting processes, and the yield of the germs is improved.

Fourth its advantage lies in setting up and takes off embryo and carry embryo workshop section. Adopting the process of degerming → sifting classification → grade suction skin → rolling → sifting → suction skin → packaging. The degerming machine processes the clean grain from the cleaning section to separate corn endosperm from embryo. The high square flat screen grades the material processed by the degerming machine, the endosperm enters an endosperm collecting scraper plate after grade skin absorption to enter a next working section for processing, the material containing the germ enters an embryo rolling machine for embryo rolling after the skin absorption, and then enters the next high square screen for screening and grading, the material containing the germ is separated, and the material containing the germ is subjected to air suction to separate pure germ.

The step five has the advantage that the quenching and tempering and puffing cooling working section is arranged, the working section mainly comprises a magnetic separator, an arch breaking feeding bin, a feeder, a quenching and tempering device, a puffing machine, a cooler and the like, and the magnetic separator is additionally arranged in the working section, so that the situation that metal in the material enters the puffing machine to damage the puffing machine and influence the normal operation of production is mainly avoided. The arch breaking feeding bin is additionally arranged at the working section, so that the arch formation of materials is effectively avoided, and the production continuity is ensured. The material enters a feeder through an arch breaking feeding bin, and the feeder adopts variable frequency speed regulation to control the feeding amount. Then the material enters a conditioner, wherein the conditioner adopts a combination scheme of a single-layer conditioner and a DDC conditioner, and aims to prolong the conditioning time of the material. And (3) extruding and puffing the quenched and tempered material in a puffing machine, wherein the puffing machine adopts a double-screw puffing machine, and the length-diameter ratio of the double-screw puffing machine is 16: 1-20: 1, a main motor and a cutting motor are subjected to frequency conversion, so that the detention time of materials in a puffing cavity is prolonged, the input and the utilization of energy are facilitated, a hydraulic plate-turning cooler is adopted, and the moisture of the puffed starch is 7-10% (mass percentage) after cooling;

sixthly, a combined crushing workshop section is arranged, firstly, a hammer mill is used for carrying out coarse crushing, the diameter of a screen mesh is phi 2.0-2.5 mm, the coarse powder enters a temporary storage bin through a lifting machine, then enters an ultrafine crusher through a gate, the ultrafine crusher screens materials with different particle sizes through variable-frequency wind speed, and the materials can be crushed to 90% (mass percentage) and pass through 80-120 meshes; the ultramicro materials enter a high square sieve through a pneumatic conveying system, the materials reaching the crushing granularity enter a temporary storage bin, and the materials not reaching the granularity requirement return to the ultramicro powder again for crushing. The combined type crushing system is mainly used for considering that the volume weight of the expanded starch is light, the expanded starch directly enters the ultrafine crusher, and under the action of the fan, materials are possibly directly sucked away, or the expanded starch is suspended in the crushing chamber and cannot fully collide with the hammer knife, so that the crushing efficiency is reduced;

the advantages of the training cage are that a secondary mixing section is arranged, the qualified modified expanded starch is mixed with other component materials in proportion in the secondary mixing section, and different requirements of different industries on the modified starch can be met through the arrangement of the secondary mixing section.

And the device has the advantages that a packing and weighing workshop section is arranged, and a packing scale is used for packing and metering.

The self-lifting is advantageous in that a steam absorption system of the chemical section is provided for the on-site steam treatment.

The device has the advantages of being provided with a plurality of sets of air nets, one set of air net for the stone removing machine in the primary cleaning and metering section, two sets of air suction and separation air nets in the blank removing and lifting section, and one set of steam treatment system for the bulking machine in the tempering and bulking cooling section and the dust removal air net in the process flow. The vibrating screen and the stoner need low-pressure wind power assistance during working, so that materials can be in a suspension state on a screen of the stoner, the stones with large specific gravity and corns with small specific gravity form a certain layer, the stones with large specific gravity move upwards under the action of upward power of the screen of the stoner, and the corns with small specific gravity move downwards under the action of wind power, so that the stones and the corns are separated. In the working process of the stone remover, a part of dust and light impurities are separated under the action of wind power. The classifying screen can realize the separation between larger materials and slight impurities by means of wind power in the processing process, and achieves the corresponding technological requirements. The hoister, the auger, the vibrating screen, the packing scale and the like easily generate dust in the working process, so that the leakage of the dust is avoided in the whole production process, and the occurrence of dangerous accidents of dust explosion is avoided. The dust removal air net is arranged to avoid dust overflow, so that the workshop environment is ensured, and the finished product quality and the health of workers are facilitated. The invention adopts a group of high-pressure air nets. In the whole processing process, partial working sections and partial equipment need to be conveyed by means of wind power, a TY-series efficient high-pressure fan, a strong negative pressure wind with material, a cyclone and an air seal machine are selected to suck and discharge materials, and the material pushing principle is adopted to realize the purpose of wind transportation, and no dust exists, so that a production workshop is sanitary and clean. And a steam absorption system of the puffing section is also used for on-site steam treatment.

The advantage lies in the control of the process parameters. The front tempering device adopts a direct steam heating method of 0.2-0.4 mPa, the tempering temperature is 50-70 ℃, warm water of about 10 ℃ is added for 1-2% (mass percent), the tempering time is 8hs, the moisture after tempering is 14-15% (mass percent), and the germs and the peels are removed: the rejection rate is 85% (mass percent), the rest endosperm enters a workshop, the moisture of the endosperm is within 15% (mass percent), and the particle size range of the endosperm is as follows: the endosperm granularity is 50-60% (mass percent) and is 8-12 meshes; the tempering temperature is 90-95 ℃, the frequency of the bulking machine is 50HZ, the temperature of a discharging cavity of the bulking machine is 110-125 ℃, the moisture at an outlet of the bulking machine is 11-12% (mass percent), the moisture after cooling is 7-10% (mass percent), the crushed granularity of a finished product is 90% (mass percent) and passes through 100 meshes-120 meshes, the gelatinization degree level of the produced modified starch is 85% (mass percent), and the viscosity coefficient is 6.77-8.25 mpa.s, so that the requirement of the bonding property of the modified starch is met.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic structural diagram of the preferred embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a material feeding port of the invention.

FIG. 3 is a schematic view of the primary cleaning metering device of the present invention.

FIG. 4 is a schematic view of the structure of a thermal refining apparatus according to the present invention.

FIG. 5 is a schematic view of the structure of the degerming apparatus of the present invention.

FIG. 6 is a schematic view of the embryo extraction device according to the present invention.

FIG. 7 is a schematic view of a high square sieve of the degerming and embryo-extracting device of the present invention.

FIG. 8 is a schematic view of the structure of the pulverizing apparatus of the single pulverizing and mixing apparatus of the present invention.

FIG. 9 is a schematic view showing the structure of a mixing device of the primary crushing and mixing device of the present invention.

Fig. 10 is a schematic structural view of a conditioning and puffing cooling device of the invention.

Fig. 11 is a schematic structural view of the combined pulverizing apparatus of the present invention.

FIG. 12 is a schematic view of the structure of the secondary mixing device of the present invention.

Fig. 13 is a schematic structural view of the completed product packaging apparatus of the present invention.

In the figure: 1-1 part, a first feeding port 1-2 parts, a first scraper plate 1-3 parts, a first fan 1-4 parts, a first dust remover 1-5 parts, a first elevator 1-6 parts, a first silencer 1-7 parts, a first pulse dust remover 1-8 parts, an intermediate separator 1-9 parts, a first air seal device 1-10 parts, a first low pressure fan 1-11 parts, a first temporary storage bin 1-12 parts, a first hand-operated electric gate 1-13 parts, a first magnetic separator 1-14 parts, a vibrating screen 1-15 parts, a circulating air separator 1-16 parts, a second magnetic separator 1-17 parts, a stone remover 1-18 parts, a flow scale 1-19 parts, a second temporary storage bin 1-20 parts, a first unpowered wheat distributor 1-21 parts, an impurity cabinet 2-1 parts, a second elevator 2-2 parts, a second dust remover 1-5 parts, a first low pressure air separator 1-12 parts, a first manual air seal device 1-13 parts, a second manual seal device 1-14 parts, a vibration screen 1-15 parts, a circulating air separator 1-16 parts, a second air separator 1-17 parts, a second air seal device 1-18 parts, a second manual seal device 1-20 parts, a second manual seal device 1-2 parts, a second manual seal device 1-1, a second manual seal device 1-1, a second manual seal device 1-1, a second manual seal device 1-1, a second manual seal device 1-2, a second manual seal device 1-1, a second manual seal device 1-2, a second manual seal device 1-1, a second manual seal device 1, a second manual seal device 1-1, a second manual seal device 1, a second manual seal device 1-1, a second manual seal device 1, 2-3 parts of water feeding pipeline, 2-4 parts of dampening machine, 2-5 parts of steam pipeline, 2-6 parts of round pipe packing auger, 2-7 parts of second hand-operated electric gate tempering bin, 2-8 parts of first upper material level indicator, 2-10 parts of first lower material level indicator, 2-11 parts of third hand-operated electric gate, 3-1 parts of collecting packing auger, 3-2 parts of third elevator, 3-3 parts of third temporary storage bin, 3-4 parts of fourth hand-operated electric gate, 3-5 parts of first material distribution packing auger, 3-6 parts of fifth hand-operated electric gate, 3-7 parts of second unpowered wheat distributor, 3-8 parts of rolling and stripping machine, 3-9 parts of first high square sieve, 3-10 parts of first air suction separator, 3-11 parts of second scraping plate and 3-12 parts of second silencer, 3-13 parts of a second pulse dust collector, 3-14 parts of a first four-linked dust collector, 3-15 parts of a second low-pressure fan, 3-16 parts of a second air seal machine, 3-17 parts of a fourth hoisting machine, 3-18 parts of a third magnetic separator, 3-19 parts of a fourth temporary storage bin, 3-20 parts of a sixth manual and electric gate, 3-21 parts of a first auger, 3-22 parts of a seventh manual and electric gate, 3-23 parts of a third unpowered wheat distributor, 3-24 parts of a blank mill, 3-25 parts of a second high square sieve, 3-26 parts of a second air suction separator, 3-27 parts of a third scraping plate, 3-28 parts of a packing bin, 3-29 parts of a first packing scale, 3-30 parts of a fifth hoisting machine, 3-31 parts of a second four-linked dust collector, 3-32 parts of a third air seal machine, 3-33 parts of a second pulse dust collector, 3-28 parts of a packing bin, a third air seal machine, a fourth air seal machine, 3-23 parts of a fourth air seal machine, 3-20 parts of a fourth air seal machine, a third air seal machine, 3-21 parts of a fourth air seal machine, 3-21, a third air seal machine, a fourth air seal machine, a third air seal machine, a fourth air seal machine, a third air seal machine, 3-34 parts of a third low-pressure fan, 3-35 parts of a third silencer, 3-36 parts of a first distributor, 3-37 parts of a third high square sieve, 3-38 parts of a conveying scraper, 4-1 parts of an endosperm collecting scraper, 4-2 parts of a sixth elevator, 4-3 parts of a fourth magnetic separator, 4-4 parts of a second dust remover, 4-5 parts of a second distributor, 4-6 parts of a bin to be crushed, 4-7 parts of a stone removing feeder, 4-8 parts of a second fan, 4-9 parts of a third dust remover, 4-10 parts of a hammer crusher, 5-1 parts of a first material sealing packing auger, 5-2 parts of a seventh elevator, 5-3 parts of a fifth magnetic separator, 5-4 parts of a fourth dust remover, 5-5 parts of a third distributor, 5-6 parts of a proportioning bin, 5-7 parts of a first proportioning auger, 5-8 parts of first ingredient scale, 5-10 parts of air return pipeline, 5-10 parts of first butterfly valve, 5-11 parts of first mixer, 6-1 part of fifth scraper, 6-2 parts of eighth elevator, 6-3 parts of sixth magnetic separator, 6-4 parts of fifth dust remover, 6-5 parts of fourth distributor, 6-6 parts of to-be-puffed bin, 6-7 parts of first arch breaking feeding bin, 6-8 parts of feeder, 6-9 parts of conditioner, 6-10 parts of third fan, 6-11 parts of puffing machine, 6-12 parts of cooler, 6-13 parts of fourth silencer, 6-14 parts of fourth fan, 6-15 parts of first shakelong, 7-1 parts of fourth air shutter, 7-2 parts of double auger, 7-3 parts of hammer crusher, 7-4 parts of second material sealing auger, 7-4 parts of first material sealing auger, 7-5 parts of a fifth fan, 7-6 parts of a third pulse dust collector, 7-7 parts of a ninth elevator, 7-8 parts of a fifth distributor, 7-9 parts of a seventh magnetic separator, 7-10 parts of a sixth dust collector, 7-11 parts of a bin to be crushed, 7-12 parts of a second feeding level indicator, 7-13 parts of a second discharging level indicator, 7-14 parts of a second arch-breaking feeding bin, 7-15 parts of an ultrafine crusher, 7-16 parts of a second shakelong, 7-17 parts of a fifth air seal machine, 7-18 parts of a sixth fan, 7-19 parts of a seventh dust collector, 7-20 parts of a sixth air seal machine, 7-21 parts of a second packing auger, 7-22 parts of a second distributing auger, 8-1 parts of a fourth high square sieve, 8-2 parts of a bin to be distributed, 8-3 parts of a second distributing auger, 8-4 parts of a second distributing scale, 8-5 parts of feeding sieve, 8-6 parts of seventh fan, 8-7 parts of third packing auger, 8-8 parts of primary cleaning sieve, 8-9 parts of eighth magnetic separator, 8-10 parts of eighth dust remover, 8-11 parts of sixth distributor, 8-12 parts of return air pipeline, 8-13 parts of second butterfly valve, 8-14 parts of second mixer, 8-15 parts of sixth scraper, 8-16 parts of tenth elevator, 8-17 parts of eighth fan, 8-18 parts of ninth dust remover, 8-19 parts of second feeding port, 9-1 parts of seventh scraper, 9-2 parts of eleventh elevator, 9-3 parts of ninth magnetic separator, 9-4 parts of tenth dust remover, 9-5 parts of seventh distributor, 9-6 parts of finished product bin, 9-7 parts of vibrating blanking device, 9-8 parts of third feeding level meter, 9-9 parts of a fourth blanking level indicator, 9-10 parts of a ninth fan, 9-11 parts of a fifth temporary storage bin, 9-12 parts of an eleventh dust remover, 9-13 parts of a level indicator, 9-14 parts of a second packing scale and a seventh air seal machine.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1-13, the modified starch binder processing equipment comprises a cleaning and metering device, a pre-conditioning device, a degerming and embryo-extracting device, a primary crushing and mixing device, a conditioning and puffing cooling device and a combined crushing device; the cleaning and metering device, the pre-tempering device, the blank removing and lifting device, the primary crushing and mixing device, the tempering and puffing cooling device and the combined crushing device are sequentially connected.

The primary cleaning metering device comprises a feeding port 1-1, a scraper conveyor 1-2, a first elevator 1-5, a first temporary storage bin 1-11, a first magnetic separator 1-13, a vibration grading sieve 1-14, a circulating air separator 1-15, a second magnetic separator 1-16, a stone remover 1-17, a flow scale 1-18, a second temporary storage bin 1-19, a magazine cabinet 1-21 and a first pulse dust collector 1-7. The feeding port 1-3 is provided with a first fan 1-3 and a first dust remover 1-4. The first temporary storage bin 1-11 is provided with a first hand-operated electric gate 1-12.

The vibration grading sieve 1-14 is provided with a vertical air suction duct, a first magnetic separator 1-13 is arranged at a feed inlet of the vibration grading sieve 1-14, and a circulating air separator 1-15 is arranged at a discharge outlet of the vibration grading sieve 1-14.

A second magnetic separator 1-16 is arranged on the stone remover 1-17; the flow scale 1-18 is connected with the second temporary storage bin 1-19; the second temporary storage bin 1-19 is provided with an unpowered wheat distributor 1-20.

The first temporary storage bin 1-11, the circulating air separator 1-15 and the stone remover 1-17 are respectively connected with the intermediate separator 1-8; the first pulse dust collector 1-7 and the intermediate separator 1-8 are connected with a first low pressure fan 1-10. The intermediate separator 1-8 is connected to a first airlock 1-9. The first pulse dust collector 1-7 is provided with a first silencer 1-6.

The magnetic separator 1-13 selects a permanent magnetic cylinder for removing magnetic impurities in the materials;

the stone remover 1-17 and the vibration grading screen 1-14 are all provided with low-pressure air nets.

The materials enter a scraper conveyor 1-2 from a feeding port 1-1, are lifted to a first temporary storage bin 1-11 through a first lifting machine 1-5, enter a stone remover 1-17 through a first magnetic separator 1-13, a vibration grading sieve 1-14, a circulating air separator 1-15 and a second magnetic separator 1-16, are weighed and metered through a flow scale 1-18, and then enter a second temporary storage bin 1-19.

The front tempering device comprises a dampening machine 2-3 and a tempering bin 2-7.

The dampening machine 2-3 is connected with the first scraper conveyor 1-2 through a second lifting machine 2-1; the dampening machine 2-3 is provided with a water adding pipeline 2-2. The dampening machine 2-3 is connected with the conditioning bin 2-7 through a round pipe auger 2-5. A second hand-operated electric gate 2-6 is arranged on the pipeline between the round pipe auger 2-5 and the tempering bin 2-7. The steam pipeline 2-4 heats the round pipe auger 2-5, and the tempering bin 2-7 is connected with the collecting auger 2-11. The tempering bin 2-7 is provided with a first feeding level indicator 2-8 and a first discharging level indicator 2-9. A third manual and electric gate 2-10 is arranged on a pipeline between the conditioning bin 2-7 and the collecting auger 2-11.

The embryo removing and extracting device comprises a third temporary storage bin 3-2, an embryo removing machine 3-3 and an embryo rolling mill 3-23.

The third temporary storage bin 3-2 is connected with a collecting auger 2-11 through a third elevator 3-1. Third temporary storage bin 3-2 is connected with kneading and degerming machine 3-3 through dividing material auger 3-4, kneading and degerming machine 3-3 is connected with first induced draft separator 3-9 through first high square screen 3-8, first induced draft separator 3-9 is connected with fourth lifting machine 3-16 through second scraper conveyor 3-10. A fourth manual electric gate 3-3 is arranged on a pipeline between the third temporary storage bin 3-2 and the material distribution auger 3-4. A fifth manual electric gate 3-5 and a second unpowered wheat distributor 3-6 are sequentially arranged on a pipeline between the material distribution auger 3-4 and the kneading embryo removing machine 3-3.

The third temporary storage bin 3-2, the material distribution auger 3-4 and the second scraper conveyor 3-10 are respectively connected with a first four-way dust collector 3-13; the second pulse dust collector 3-12 and the first four-way dust collector 3-13 are connected with a second low-pressure fan 3-14. The first four-way dust collector 3-13 is connected with the second air seal machinery 3-15. The second pulse dust collector 3-12 is provided with a second silencer 3-11.

The fourth elevator 3-16 is connected with the fourth temporary storage bin 3-18, the top of the fourth temporary storage bin 3-18 is provided with a third magnetic separator 3-17, the fourth temporary storage bin 3-18 is connected with a blank mill 3-23 through a first packing auger 3-20, the blank mill 3-23 is connected with a second air suction separator 3-25 through a second square sieve 3-24, and the second air suction separator 3-25 is connected with a fifth elevator 3-29 through a third scraper conveyor 3-26. A sixth manual electric gate 3-19 is arranged on a pipeline between the fourth temporary storage bin 3-18 and the first auger 3-20. A seventh manual electric gate 3-21 and a third unpowered wheat distributor 3-22 are sequentially arranged on a pipeline between the first winch 3-20 and the blank rolling mill 3-23. The materials separated by the second induced draft separator 3-25 enter the packing bin 3-25, and the materials in the packing bin 3-25 are weighed and packed by the first packing scale 3-28. The third scraper conveyor 3-26 is connected to a fifth hoist 3-29.

The fourth temporary storage bin 3-18, the second induced draft separator 3-25 and the fifth hoister 3-29 are respectively connected with the second four-way dust remover 3-30; the third pulse dust collector 3-32 and the second four-way dust collector 3-30 are connected with a third low-pressure fan 3-33. The second four-way dust collector 3-30 is connected with a third air seal machine 3-31. The third pulse dust collector 3-32 is provided with a third silencer 3-34.

The fifth lifter 3-29 is respectively connected with a plurality of third square gauzes 3-36 through the first distributors 3-35, and the square gauzes 3-36 are connected with the sixth lifter 4-1 through endosperm collecting scrapers 3-38. The third high square screen 3-36 is connected with a germ conveying scraper 3-37.

The primary crushing and mixing device comprises a hammer crusher 4-9 and a mixer 5-7.

A stone removing feeder 4-6 is arranged on the hammer piece crusher 4-9, the stone removing feeder 4-6 receives materials in a bin 4-5 to be crushed, and a sixth elevator 4-1 is connected with the bin 4-5 to be crushed through a fourth magnetic separator 4-2 and a second distributor 4-4. The hammer piece crusher 4-9 is connected with a seventh elevator 5-1 through a first material sealing auger 4-10. The seventh elevator 5-1 is connected with the proportioning bin 5-5 through the fifth magnetic separator 5-2 and the third distributor 5-4, and the proportioning bin 5-5 is connected with the first proportioning scale 5-7 through the first proportioning auger 5-6; the first batching scale 5-7 is connected to the mixer 5-10. The mixer 5-10 is connected with an eighth hoister 6-1 through a fifth scraper 5-11. A first butterfly valve 5-9 is arranged on a pipeline between the first batching scale 5-7 and the mixer 5-10. A second dust remover 4-3 is arranged on a pipeline between the fourth magnetic separator 4-2 and the second distributor 4-4. The hammer piece crusher 4-9 is provided with a third dust remover 4-8, and the third dust remover 4-8 is connected with a second fan 4-7. A fourth dust remover 5-3 is arranged on a pipeline between the fifth magnetic separator 5-2 and the third distributor 5-4. The first batching scale 5-7 is connected with an air return pipeline 5-8.

The quenching and tempering, puffing and cooling device comprises a quenching and tempering device 6-8, a puffing machine 6-10 and a cooler 6-1; the conditioner 6-8 is connected with the cooler 6-1 through the bulking machine 6-10.

The eighth hoisting machine 6-1 passes through the sixth magnetic separator 6-2, the fifth dust remover 6-3, the fourth distributor 6-4 and the bin to be puffed 6-5, and the material in the bin to be puffed 6-5 enters the feeder 6-7 on the conditioner 6-8 through the first arch breaking feeding bin 6-6. The conditioners 6-8 adopt a combined structure of a single-layer conditioner and a DDC conditioner. The feeder 6-7 is connected with a third fan 6-9. The cooler 6-1 is connected with a first salon 6-14, and the first salon 6-14 is provided with a fourth silencer 6-12, a fourth fan 6-13 and a fourth air seal 6-15.

The bulking machine 6-10 adopts a double-screw bulking machine, wherein the length-diameter ratio of the double-screw bulking machine is 16: 1-20: 1.

the combined crushing device comprises a hammer piece crusher 7-2 and an ultra-fine crusher 7-14. The hammer piece crusher 7-2 is connected with the cooler 6-1 through a double auger 7-1. The hammer piece crusher 7-2 is connected with a bin to be crushed 7-10 through a second material sealing auger 7-3, a ninth elevator 7-6, a fifth distributor 7-7 and a seventh magnetic separator 7-8. The hammer piece crusher 7-2 is provided with a third pulse dust collector 7-5, and the third pulse dust collector 7-5 is connected with a fifth fan 7-4.

The materials in the bin 7-10 to be crushed enter the superfine crusher 7-14 through the second arch breaking feeding bin 7-13. A second feeding level indicator 7-11 and a second discharging level indicator 7-12 are arranged on the bin 7-10 to be crushed. A sixth dust remover 7-9 is arranged on a pipeline between the fifth distributor 7-7 and the seventh magnetic separator 7-8.

The secondary mixing device comprises a material bin 8-1 to be mixed, a second mixing scale 8-3 and a second mixer 8-13.

The ultrafine grinder 7-14 is connected with a second cyclone 7-15, and the second cyclone 7-15 is respectively connected with a seventh dust collector 7-18, a material distributing auger 7-21 and a second auger 7-20. The seventh dust remover 7-18 is connected with the second packing auger 7-20. And a sixth air seal machine 7-19 is arranged on the seventh dust remover 7-18. The seventh dust remover 7-18 is connected with a sixth fan 7-17. The material separating auger 7-21 is connected with a fourth high square screen 7-22, and the fourth high square screen 7-22 is connected with a material bin 8-1 to be prepared. A fifth air seal machinery 7-16 is arranged on the second shakelong 7-15. The material feeding bin 8-1 to be mixed is provided with a material feeding sieve 8-4. The feeding sieve 8-41 is connected with a seventh fan 8-5.

The materials in the bin 8-1 to be mixed enter a second mixing weigher 8-3 through a second mixing auger 8-2, and the second mixing weigher 8-3 is connected with a mixer 8-13. A second butterfly valve 8-12 is arranged on a pipeline between the second ingredient scale 8-3 and the mixer 8-13. The mixer 8-13 is connected to an eleventh hoisting machine 9-1 via a sixth flight conveyor 8-14. The eleventh hoisting machine 9-1 is connected with the finished product bin 9-5 through a ninth magnetic separator 9-2 and a seventh distributor 9-4. And a third material loading level meter 9-7 and a third material discharging level meter 9-8 are arranged on the finished product bin 9-5. The second batching scale 8-3 is connected with an air return pipeline 8-11. A tenth dust remover 9-3 is connected on the pipeline between the ninth magnetic separator 9-2 and the seventh distributor 9-4.

The second feeding port 8-18 is connected with the bin to be mixed 8-1 through an eighth scraper conveyor 8-19, a tenth elevator 8-15, a scalping screen 8-7, an eighth magnetic separator 8-8, a sixth distributor 8-10 and a third packing auger 8-6. An eighth dust remover 8-9 is connected on a material pipeline between the eighth magnetic separator 8-8 and the sixth distributor 8-10. An eighth fan 8-16 and a ninth dust remover 8-17 are arranged on the second feeding port 8-18.

The finished product packing device comprises a vibration feeder 9-16, a fifth temporary storage bin 9-10 and a second packing scale 9-13. The materials in the finished product bin 9-5 enter a fifth temporary storage bin 9-10 through a vibrating feeder 9-16, and a charge level indicator 9-12 is arranged on the fifth temporary storage bin 9-10. The fifth temporary storage bin 9-10 is connected with a second packing scale 9-13. An eleventh dust remover 9-11 is connected to the second packing scale 9-13, a ninth fan 9-9 is connected to the eleventh dust remover 9-11, and a seventh air seal machinery 9-14 is arranged on the eleventh dust remover 9-11.

The invention relates to a modified starch binder processing technology, which comprises a primary cleaning and metering section, a pre-conditioning section, a blank removing and extracting section, a primary crushing section, a primary mixing section, a conditioning and puffing and cooling section, a combined crushing section, a secondary mixing section, a packaging section and other auxiliary functions.

The working principle of the method is that starch sources such as corn, wheat and the like which are raw materials enter a first scraper conveyor 1-2 from a first feeding port 1-1, are lifted to a first temporary storage bin 1-11 through a first lifting machine 1-5, and enter a primary cleaning section through a first hand-operated electric gate 1-12, wherein the primary cleaning section mainly comprises a first magnetic separator 1-13, a vibrating screen 1-14, an air separator 1-15, a stone remover 1-17 and the like.

The high-efficiency vibrating screens 1-14 are used for cleaning large impurities and small impurities which may be contained in grains, and are matched with a vertical air suction duct for cleaning light impurities such as dust and the like in the grains. The first magnetic separator 1-13 adopts a permanent magnetic cylinder, is convenient to maintain, can remove iron chips, screws and other magnetic impurities possibly contained in grains, and can protect the degerming machine of high-speed rotating equipment. The stone remover 1-17 is used for removing heavy impurities with larger specific gravity than corn, such as stones and the like possibly contained in the grain, and the stone remover is provided with a low-pressure air net and can remove light impurities with lighter specific gravity, such as part of dust and the like in the grain. And (4) metering after a cleaning section, wherein the starch source raw materials are mainly conveyed to a metering scale for weighing and metering. The flow balance 1-18 is used for measuring the processing amount of the grain, and is convenient for production, operation and management. The dust removal air net is used for removing impurities such as dust, light impurities and the like in grains, so that the dust content of air discharged into the atmosphere is not overproof, and the atmospheric environment is protected.

The measured starch source raw material enters a pre-tempering working section which mainly comprises a dampening machine 2-3, a round pipe auger 2-5, a second hand electric gate 2-6 and a tempering bin 2-7, wherein the dampening machine 2-3 is connected with a tap water pipeline 2-2, the raw material and water are preliminarily mixed in the dampening machine 2-3, the water content in the raw material is adjusted, the water content in the raw material is stabilized, the dampened raw material enters the round pipe auger 2-5, the round pipe auger 2-5 is connected with a steam pipeline 2-4, the dampened material is lifted to a certain temperature through steam, then enters the tempering bin 2-7 through the gate second hand electric 2-6, the capacity of the tempering bin 2-7 is large, the cleaned clean grain is tempered by adding 1-2% (mass percent) of water into the tempering bin 2-7 through the computer dampening machine 2-2, the tempering time is 8 hours, which aims to soften the germ, ensure that the germ is not broken in the germ removing and extracting processes and improve the yield of the germ.

Then entering the next degerming and embryo-extracting working section. Adopting the process of degerming → sifting classification → grade suction skin → rolling → sifting → suction skin → packaging. The degerming machine processes the clean grain from the cleaning section to separate corn endosperm from embryo. The high square flat screen 3-8 grades the material processed by the degerming machine 3-7, the endosperm enters an endosperm collecting scraper 3-38 after grade skin absorption to enter a next working section for processing, the material containing the germ enters a flaking mill 3-23 after skin absorption to be milled, then enters a next high square screen 3-24 for grading, the material containing the germ is separated, and the material containing the germ is subjected to air suction to separate pure germ. The endosperm enters a primary crushing section through a lifter, the fourth magnetic separator 4-2, a bin to be crushed 4-5, a hammer crusher 4-9 and a third (pulse) dust collector system 4-8 form the primary crushing section, and the endosperm is crushed by the hammer crusher 4-9 to form starch and then enters a primary mixing section.

Mixing starch with other starch sources such as cassava starch in a primary mixing section, and mainly adjusting the proportion of amylose to amylopectin in the starch. The corn starch is used as a main material, the cassava starch is used as an auxiliary material, and the mass ratio of the corn starch to the cassava starch can be 7:3 or 6: 4. The starch after primary mixing enters a tempering and puffing cooling section through a lifter, the section mainly comprises a sixth magnetic separator 6-2, a first arch breaking feeding bin 6-6, a feeder 6-7, a tempering device 6-8, a puffing machine 6-10, a cooler 6-11 and the like, and the sixth magnetic separator 6-2 is additionally arranged in the section and mainly prevents metals in the materials from entering the puffing machine 6-10 to damage the puffing machine 6-10 and influence the normal operation of production. The arch breaking feeding bin 6-6 is additionally arranged at the working section, so that the starch arch is effectively avoided, and the production continuity is ensured. The first arch-broken feeding bin 6-6 of the material enters a feeder 6-7, and the feeder 6-7 adopts variable frequency speed regulation to control the feeding amount.

Then the starch enters a conditioner 6-8, and the invention adopts a combination scheme of a single-layer conditioner and a DDC conditioner, aiming at prolonging the conditioning time of the starch.

The material after the tempering enters an extruder 6-10 for extrusion and expansion treatment, the material is sent into the extrusion expander, and under the pushing action of the screw, the material moves forwards in an axial direction. Meanwhile, due to the mechanical friction action between the screw and the material, between the material and the puffing cavity and inside the material, the material is strongly extruded, stirred and sheared, and as a result, the material is further refined and homogenized. Along with the gradual increase of the pressure in the machine cavity, the temperature is correspondingly and continuously increased, the physical properties of the materials are changed under the conditions of high temperature, high pressure and high shearing force, the materials are changed into paste from powder, and the starch is gelatinized, cracked and recombined. At the moment when the pasty material is sprayed out from the die hole, under the action of strong pressure difference, the water is quickly vaporized, and the material is puffed to form a puffed starch product with a loose, porous and crisp structure, so that the purpose of extrusion puffing is achieved.

The expanded starch enters a cooler 6-11 through a chute, and the water content of the expanded starch is 7-10% (mass percentage) after cooling. The cooled materials enter a combined crushing working section, the materials are firstly coarsely crushed by a hammer crusher 7-2, the diameter of a screen mesh is 2.0-2.5 mm, the coarsely crushed materials enter a temporary storage bin 7-10 through a ninth elevator 7-6 and then enter an ultrafine crusher 7-14 through a second arch breaking feeding bin 7-13, and the ultrafine crusher screens the materials with different granularities through wind speed, so that the materials can be crushed to 90% (mass percentage) and pass through 100-120 meshes; the ultramicro materials enter a fourth high square sieve 7-22 through a pneumatic conveying system, the materials reaching the grinding granularity enter a material bin to be prepared 8-1, and the materials not reaching the granularity requirement return to the ultramicro powder for grinding again.

And then the material enters a secondary mixing section, the qualified modified expanded starch is mixed with other component materials in the secondary mixing section according to a proportion, and the mixed material enters an eleventh hoisting machine 9-1 and enters a packing bin and then is packed.

The invention relates to an auxiliary function wind network system. The invention is provided with four sets of air nets, one set of air net for the stone removing machine, two sets of air suction and separation air nets and one set of steam treatment system for the bulking machine. The vibrating screen and the stoner need low-pressure wind power assistance during working, so that materials can be in a suspension state on a screen of the stoner, the stones with large specific gravity and corns with small specific gravity form a certain layer, the stones with large specific gravity move upwards under the action of upward power of the screen of the stoner, and the corns with small specific gravity move downwards under the action of wind power, so that the stones and the corns are separated. In the working process of the stone remover, a part of dust and light impurities are separated under the action of wind power. The classifying screen can realize the separation between larger materials and slight impurities by means of wind power in the processing process, and achieves the corresponding technological requirements.

The dust is easily generated in the working process of the hoister, the auger, the vibrating screen and the like, and the dust is prevented from overflowing by arranging the dust removing air net, so that the workshop environment is ensured, and the finished product quality and the health of workers are facilitated.

The invention adopts a group of high-pressure air nets. In the whole processing process, partial working sections and partial equipment need to be conveyed by means of wind power, a TY-series efficient high-pressure fan, a strong negative pressure wind with material, a cyclone and an air seal machine are selected to suck and discharge materials, and the material pushing principle is adopted to realize the purpose of wind transportation, and no dust exists, so that a production workshop is sanitary and clean. And a steam absorption system of the puffing section is also used for on-site steam treatment. The dust control system in the technical process comprises a dust absorption system at a packing opening, and is used for processing field dust and additionally arranging a pulse dust collector on a lifter conveying device, so that the leakage of the dust is avoided in the whole production process, and the dangerous accident of dust explosion is avoided.

The processing technology and equipment of the modified starch binder designed by the invention effectively solve the problem of industrialized continuous production of modified starch through technological innovation, can produce the modified starch binders with different formulas and different requirements through formula and technological adjustment, and can be applied to industries such as food, medicine, chemical industry, feed, casting, petroleum drilling, spinning, building materials, casting, papermaking and the like.

In light of the foregoing description of preferred embodiments according to the invention, it is clear that many changes and modifications can be made by the person skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.

Claims

1. The processing technology of the modified starch binder is characterized by comprising the following steps:

(1) initial clearing: cleaning impurities in the materials;

(2) pre-tempering: preliminarily mixing the material obtained in the step (1) with water to obtain a water-absorbing material, uniformly distributing water in the water-absorbing material, heating the water-absorbing material, adding water for tempering, and softening germs; heating the water-absorbing material by adopting a direct steam heating method of 0.2-0.4 mPa;

removing germs and peels: the rejection rate is 85 percent;

(3) degerming and extracting: performing degerming processing on the material obtained in the step (2), so that corn endosperm is separated from embryo, and the endosperm is subjected to grade skin absorption, wherein the mass percentage of water in the endosperm is 13-15%, and the endosperm with the endosperm granularity of 50-60% passes through 8-12 meshes; the material containing the germ is subjected to skin absorption, embryo rolling and sieving classification to separate the material containing the germ, and the material containing the germ is subjected to air suction to separate pure germ;

(4) primary crushing: crushing the endosperm obtained in the step (3) by a hammer mill to form starch;

(5) primary mixing: mixing the starch obtained in the step (4) with other starch sources, and further adjusting the proportion of amylose to amylopectin in the starch;

(6) quenching and tempering, puffing and cooling: quenching and tempering the mixed material obtained in the step (5) in a quenching and tempering device, wherein the quenching and tempering device adopts a combined structure of a single-layer quenching and tempering device and a DDC quenching and tempering device, the quenching and tempering temperature is 90-95 ℃, and the quenching and tempering time is 90-120 s;

the modified material enters a bulking machine for extrusion and bulking treatment, the frequency of the bulking machine is 45-65 HZ, the temperature of a discharging cavity of the bulking machine is 110-125 ℃, and the water content of an outlet of the bulking machine is 11-12%;

then cooling, controlling the mass percent of water in the cooled expanded starch to be 7-10%, and controlling the temperature of the cooled material to be not higher than the ambient temperature by 5 ℃;

(7) combining and crushing: coarsely crushing the cooled material in the step (6) by using a hammer crusher, wherein the diameter phi of a screen of the hammer crusher is 2.0-2.5 mm;

feeding the coarsely crushed material into an ultrafine crusher, screening materials with different particle sizes through variable-frequency wind speed, crushing the material until 90% of the material in percentage by mass passes through 80-120 meshes to obtain modified expanded starch, wherein the gelatinization degree of the modified expanded starch is 80-85%, and the viscosity coefficient is 6.77-8.25 mpa.s;

the processing technology of the modified starch binder is realized by modified starch binder processing equipment, and the processing equipment comprises a primary cleaning metering device, a pre-conditioning device, an embryo removing and extracting device, a primary crushing and mixing device, a conditioning, puffing and cooling device and a combined crushing device; the primary cleaning metering device, the pre-tempering device, the degerming and embryo extracting device, the primary crushing and mixing device, the tempering, puffing and cooling device and the combined crushing device are sequentially connected;

the front tempering device comprises a dampening machine (2-3) and a tempering bin (2-7);

the dampening machine (2-3) is connected with the primary cleaning metering device through a second hoisting machine (2-1); the dampening machine (2-3) is connected with the conditioning bin (2-7) through a round pipe auger (2-5), the steam pipeline (2-4) heats the round pipe auger (2-5), and the conditioning bin (2-7) is connected with the collecting auger (2-11);

the embryo removing and extracting device comprises a kneading third temporary storage bin (3-2), an embryo removing machine (3-3) and an embryo rolling mill (3-23);

the third temporary storage bin (3-2) is connected with the pre-conditioning device through a third elevator (3-1); the third temporary storage bin (3-2) is connected with the kneading and degerming machine (3-3) through a material distributing auger (3-4), the kneading and degerming machine (3-3) is connected with a first air suction separator (3-9) through a first square sieve (3-8), and the first air suction separator (3-9) is connected with a fourth hoister (3-16) through a second scraper conveyor (3-10);

the fourth hoisting machine (3-16) is connected with the fourth temporary storage bin (3-18), the top of the fourth temporary storage bin (3-18) is provided with a third magnetic separator (3-17), the fourth temporary storage bin (3-18) is connected with a flaking mill (3-23) through a packing auger (3-20), the flaking mill (3-23) is connected with a second air suction separator (3-25) through a second square sieve (3-24), and the second air suction separator (3-25) is connected with a fifth hoisting machine (3-29) through a third scraper conveyer (3-26);

the fifth lifting machine (3-29) is respectively connected with a plurality of third square gauzes (3-36) through distributors (3-35), and the square gauzes (3-36) are connected with the sixth lifting machine (4-1) through endosperm collecting scrapers (3-38);

the primary crushing and mixing device comprises a hammer crusher (4-9) and a mixer (5-7);

a stone removing feeder (4-6) is arranged on the hammer piece crusher (4-9), the stone removing feeder (4-6) receives materials in a bin (4-5) to be crushed, and the bin (4-5) to be crushed is connected with a blank removing and lifting device through a fourth magnetic separator (4-2) and a sixth lifting machine (4-1); the hammer piece crusher (4-9) is connected with the mixer (5-10) through a seventh hoisting machine (5-1), a fifth magnetic separator (5-2) and a proportioning bin (5-5);

the quenching and tempering and puffing cooling device comprises a quenching and tempering device (6-8), a puffing machine (6-10) and a cooler (6-1); the conditioner (6-8) is connected with the cooler (6-1) through a bulking machine (6-10);

the conditioner (6-8) adopts a combined structure of a single-layer conditioner and a DDC conditioner, and a feeder (6-7) is arranged on the conditioner (6-8); the bin (6-5) to be puffed is connected with a mixing device of the primary crushing and mixing device through a distributor (6-4), a sixth magnetic separator (6-2) and an eighth hoisting machine (6-1), and the material in the bin (6-5) to be puffed enters a feeder (6-7) through a first arch breaking feeding bin (6-6);

a dust remover (6-3) is arranged on a pipeline between the distributor (6-4) and the sixth magnetic separator (6-2);

the bulking machine (6-10) adopts a double-screw bulking machine, wherein the length-diameter ratio of the double-screw bulking machine is 16: 1-20: 1;

the combined crushing device comprises a hammer crusher (7-2) and an ultrafine crusher (7-14);

the hammer piece crusher (7-2) is connected with a cooling device of the quenching and tempering puffing cooling device through a packing auger (7-1);

the hammer piece crusher (7-2) is connected with a bin (7-10) to be crushed through a material sealing auger (7-3), a ninth elevator (7-6), a distributor (7-7) and a seventh magnetic separator (7-8);

a second arch breaking feeding bin (7-13) is arranged on the bin (7-10) to be crushed, and the ultrafine crusher (7-14) receives materials in the second arch breaking feeding bin (7-13).

2. The modified starch binder processing technology as claimed in claim 1, wherein the primary cleaning metering device comprises a feeding port (1-1), a scraper conveyor (1-2), a first elevator (1-5), a first temporary storage bin (1-11), a first magnetic separator (1-13), a vibrating classifying screen (1-14), a circulating air separator (1-15), a second magnetic separator (1-16), a stone remover (1-17), a flow scale (1-18) and a second temporary storage bin (1-19);

the vibration grading sieve (1-14) is provided with a vertical air suction channel, a first magnetic separator (1-13) is arranged at a feed inlet of the vibration grading sieve (1-14), and a circulating air separator (1-15) is arranged at a discharge outlet of the vibration grading sieve (1-14);

a second magnetic separator (1-16) is arranged on the stone remover (1-17); the flow scale (1-18) is connected with the second temporary storage bin (1-19);

the first temporary storage bin (1-11), the circulating air separator (1-15) and the stone remover (1-17) are respectively connected with a dust removal air net;

the magnetic separator (1-13) adopts a permanent magnetic cylinder for removing magnetic impurities in the materials;

the stone removing machine (1-17) and the vibration grading sieve (1-14) are both provided with a low-pressure air net;

the material enters a scraper conveyor (1-2) from a feeding port (1-1), is lifted to a first temporary storage bin (1-11) through a first lifting machine (1-5), enters a stone remover (1-17) through a first magnetic separator (1-13), a vibrating classifying screen (1-14), a circulating air separator (1-15) and a second magnetic separator (1-16), is weighed by a flow scale (1-18) and enters a second temporary storage bin (1-19).