CN115463597A

CN115463597A - Starch size mixing system and size mixing method

Info

Publication number: CN115463597A
Application number: CN202211053624.0A
Authority: CN
Inventors: 陈瑞锋; 许克强; 邓远德
Original assignee: Maanshan Tongjieliang Biological Material Co ltd
Current assignee: Ma'anshan Tongjieliang Polylactic Acid Materials Co ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2022-12-13
Anticipated expiration: 2042-08-31
Also published as: CN115463597B

Abstract

The invention provides a starch size mixing system used in the preparation of lactic acid by biological fermentation, which comprises a metering tank, a conveying unit and a size mixing tank, wherein the metering tank is connected with the conveying unit; the metering tank is provided with a feeding port for feeding starch raw materials, a discharge port of the metering tank is connected with a feeding port of the conveying unit, a discharge port of the conveying unit is connected with a feed port of the size mixing tank, and the size mixing tank is provided with a water inlet, a pressure discharge port and a size discharge port for discharging starch size; the pipeline of the conveying unit is internally provided with a spiral conveying area and a pre-slurry mixing area in sequence along the material conveying direction, a spiral conveying mechanism is arranged in the spiral conveying area, and a first stirring mechanism and a water spraying mechanism are arranged in the pre-slurry mixing area. The size mixing system pre-mixes the starch in the process of conveying the starch to the size mixing tank by the transmission unit before the starch enters the size mixing tank for formal size mixing, and compared with the traditional size mixing method, the size mixing efficiency is higher.

Description

Starch size mixing system and size mixing method

Technical Field

The invention relates to the technical field of biological fermentation, in particular to a starch size mixing system and a size mixing method in a fermentation lactic acid preparation process.

Background

In the prior production process for preparing glucose by liquefying and hydrolyzing starch by a double-enzyme method, the first step is to mix commercial starch and water to prepare starch slurry which is suitable for spraying and heating and meets the concentration required by starch hydrolysis. The general size mixing process is that commercial starch is sent into a size mixing tank with a stirring device, which is pre-stored with a certain amount of size mixing water, through a conveying device, the starch and the water are mixed to prepare starch size with a certain concentration, then hydrochloric acid or caustic soda is added into the starch size to adjust the pH value of the starch size, then a certain amount of alpha-amylase is added to be uniformly mixed, and the mixture is sent to a primary steam jet heater by a pump. The stirring time of the slurry mixing process is long, the efficiency is low, more starch clusters exist in the stirred starch slurry, the starch and water are not fully mixed, the starch slurry is not uniform, the concentration of the starch slurry is low, the production quality is poor, and the yield of starch sugar and the quality of the starch sugar are influenced. In addition, due to the long size mixing time and low production efficiency, the requirement of the downstream work section for size mixing can be met only by using more size mixing equipment during large-scale production, and the production cost is high.

In order to solve the problems of the existing starch size mixing method, the published patents are improved variously.

Patent CN208944013U discloses a starch sugar production is with mixing thick liquid device, including first transfer thick liquid jar and support column, first transfer thick liquid jar bottom fixed mounting all around has a plurality of support columns, first transfer thick liquid jar inside bottom fixed mounting have first agitating unit, first transfer thick liquid jar top fixed mounting have the filtration pipeline, the top fixed mounting of filtration pipeline has the second to transfer thick liquid jar, the inside bottom fixed mounting that the thick liquid jar was transferred to the second has a plurality of second agitating unit, and the device simple structure, the substep stirring can be so that the impurity in the production process is showing and is reducing, has improved the utilization ratio of raw and other materials. The scheme is only improved in the aspect of stirring, and the starch and the size mixing water are directly added into the size mixing tank to be mixed and then stirred for multiple times in steps, and the problem that starch clusters are easily formed in the mixing mode, so that the size mixing effect is influenced.

Patent CN102836655A discloses a method for mixing slurry by using a slurry mixing device, wherein the slurry mixing device comprises a stirring tank with a feeding port, the slurry mixing device further comprises a feeding support structure for supporting a material to be mixed and packaged in a packaging bag, the upper part, the lower part and the side part of the feeding support structure are respectively provided with a feeding port, a discharging port and an operation hole, the feeding port of the feeding support structure is positioned above and matched with the feeding port of the stirring tank, the method comprises the steps of injecting a solvent for mixing slurry into the stirring tank, conveying the material to be mixed and packaged in the packaging bag to the feeding support structure, then operating the material to be mixed at the sealing edge of Kong Tuiji packaging bag to ensure that the amount of the material to be mixed at the sealing edge of the packaging bag is less than the amount of the material to be mixed at other positions in the packaging bag, unting the sealing of the packaging bag, enabling the material to be mixed to enter the stirring tank, and stirring. The patent focuses on improving the feeding mode, reducing the labor intensity of operators and improving the size mixing efficiency, but the mixing mode of starch and size mixing water is not fundamentally changed, the size mixing water and the starch are still added into the same stirring tank together for stirring and mixing, and the mode cannot avoid the formation of starch lumps in the starch mixing process.

The prior art mainly has the problem that starch clusters are easily formed if the starch and the mixing water are not mixed uniformly and thoroughly in the mixing process, so that the mixing effect is influenced. Therefore, in order to avoid the formation of starch lumps when mixing starch and the mixing water, improvements in the mixing of starch and the mixing water are required in addition to the increased number and number of stirring steps as used in the published patent CN 208944013U.

Disclosure of Invention

In order to solve the problems of low starch size mixing efficiency, uneven starch and water mixing and easy occurrence of starch clusters in the existing method, the invention provides an efficient starch size mixing system, and the size obtained by the system is very uniform.

The basic concept of the technical scheme of the invention is as follows:

a starch size mixing system comprises a metering tank, a conveying unit and a size mixing tank; the metering tank is provided with a feeding port for feeding starch raw materials, a discharge port of the metering tank is connected with a feeding port of the conveying unit, a discharge port of the conveying unit is connected with a feed port of the slurry mixing tank, and the slurry mixing tank is provided with a water inlet, a pressure discharge port and a slurry discharge port for discharging starch slurry;

the pipeline of conveying unit is inside to set gradually spiral transmission region and preliminary mixing thick liquid region along material direction of delivery, establish screw conveyor in the spiral transmission region, establish first rabbling mechanism and water spray mechanism in the preliminary mixing thick liquid region.

As an example, the pipeline of the conveying unit has a central transmission rod penetrating through the central portions of the screw conveying area and the pre-slurry mixing area and driven to rotate by a first driving mechanism, the screw conveying mechanism is arranged around the central transmission rod, and one end of the first stirring mechanism is arranged on the central transmission rod.

Optionally, the ratio of the length of the central transmission rod in the spiral transmission area to the length of the pre-slurry mixing area is 1 to 1, and is preferably 1:2.

As an example, a partition plate is arranged between the spiral conveying area and the pre-slurry mixing area, the upper end of the partition plate is arranged on the top wall of the pipeline of the conveying unit, and the central transmission rod vertically penetrates through the partition plate and the lower edge of the partition plate to be suspended below the central transmission rod.

Optionally, the area of the baffle is 2/3 of the interface between the spiral conveying region and the pre-slurry region.

As an example, the first stirring mechanism includes a first stirring rod and a first stirring blade, one end of the first stirring rod is fixed on the central transmission rod, and the other end of the first stirring rod is connected to the first stirring blade.

Optionally, the first stirring blade is arc-shaped, and the radian of the arc is matched with the radian of the inner wall of the pipeline in the pre-slurry mixing area so as to enable the outer surface of the first stirring blade to be in seamless contact with the inner wall of the pipeline;

optionally, the first stirring mechanism is disposed in the preliminary slurry mixing area, and one end of the first stirring rod is symmetrically or alternatively disposed on the central transmission rod.

As an example, the water spraying mechanism includes a plurality of nozzles disposed on an inner wall of the pipe in the pre-slurry mixing region, the nozzles are connected to a water delivery tank disposed in the conveying unit, and the water delivery tank is connected to a water storage tank disposed above the conveying unit through a pressure pump and a first water delivery pipe.

Optionally, the nozzle is elliptical and the major axis of the ellipse is parallel to the central drive rod.

Optionally, the reservoir is placed on a support platform fixed to the top of the outside of the conveyor unit.

As an example, the central transmission rod is a solid rod in the spiral transmission area, a hollow rod in the pre-slurry mixing area, a water injection unit is arranged at the joint of the hollow rod and the solid rod and extends towards one side of the hollow rod, a water injection port of the water injection unit is connected with a water storage tank arranged above the conveying unit through a pressure pump and a second water pipe, a water outlet of the water injection unit is connected with the hollow rod, the water injection mechanism further comprises a water injection hole, and the water injection hole is arranged on the peripheral wall of the hollow rod.

Optionally, the water jets are staggered with respect to the nozzles.

Optionally, the water spray hole is an elliptical hole, and the long axis of the elliptical hole is parallel to the central transmission rod.

Optionally, the water jets are distributed along the hollow bar in a single row or in parallel rows.

Optionally, the first water pipe and the second water pipe are provided with water delivery control valves for adjusting flow.

As an example, the water injection unit comprises a sealed space, a water storage space arranged on the inner periphery of the sealed space, and a blocking piece, wherein the water storage space is communicated with the water injection port;

the water storage device is characterized in that a plurality of hollow holes which are arranged in a staggered mode are formed in the peripheral wall of the hollow rod in the water storage space, one end of each blocking piece is fixed to the hollow rod at the front end and the rear end of each hollow hole, the other end of each blocking piece extends to the sealed space, and the sealed space is filled with a waterproof sealing material with a low friction coefficient.

Optionally, the sealing material is made of butadiene-acrylonitrile rubber, chloroprene rubber or polytetrafluoroethylene, and further preferably polytetrafluoroethylene.

Optionally, the conveying unit is inclined downwards by 5-10 degrees from the feeding port to the discharging port.

Optionally, the metering tank is mounted at a height greater than a mounting height of the delivery unit.

As an example, a plurality of air blowing holes are arranged on the pipeline wall of the conveying unit below the partition plate, and the air blowing holes are connected with the air blowing unit through air supply hoses.

Optionally, the included angle between the central line of the blowing hole and the central line of the central transmission rod is 20-45 degrees, and preferably 30 degrees.

As an example, a second stirring mechanism driven by a second driving mechanism is arranged in the slurry mixing tank, the second stirring mechanism comprises a second stirring rod and a second stirring blade, one end of the second stirring rod is connected with the spiral groove of the central transmission rod through a driving gear to form a driving conversion unit, and the other end of the second stirring rod is connected with the second stirring blade.

As an example, the starch size mixing system is provided with a plurality of size mixing tanks, and the discharge port of the conveying unit is connected with the feed port of each size mixing tank through a material distributing valve.

Optionally, the starch size mixing system is provided with a master control unit for controlling the metering tank, the conveying unit, the size mixing tank and controllable opening and closing or action elements arranged on a pipeline between the metering tank, the conveying unit and the size mixing tank.

Optionally, the master control unit comprises a feeding control module, a conveying unit control module, a water spraying control module, a blowing control module, a stirring control module and a size mixing control module.

The invention also provides a starch size mixing method based on any one of the starch size mixing systems, wherein the starch size mixing method comprises the steps of conveying the raw starch from the metering tank to a size mixing tank in a size pre-mixing area of a conveying unit, and then conveying the raw starch into the size mixing tank for formal size mixing to obtain uniform and non-caking starch size.

Compared with the prior art, the invention has the following advantages:

1. the size mixing system provided by the invention can pre-mix the starch in the process of conveying the starch to the size mixing tank by using the transmission unit in advance before the starch enters the size mixing tank for formal size mixing, and compared with the traditional size mixing method, the size mixing efficiency is high, and the size mixing time can be shortened by 40%.

2. The starch slurry obtained by the slurry mixing method is uniform and free of agglomeration, the quality of sugar liquor in a later section is fully guaranteed, and the yield of starch sugar is improved. The comprehensive production cost of the size mixing process is reduced.

3. The invention sprays the mixing water to the pre-mixing section through the arranged nozzle and the water spray hole, the starch is uniformly mixed with the mixing water under the action of the stirring unit, and the formed starch slurry is transferred into the mixing tank through the discharge hole to be further stirred, so as to prepare the mixing slurry.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.

FIG. 1 is a schematic view of a partial structure of a starch sizing system according to example 1 of the present invention.

Fig. 2 is a schematic structural view of the connection between the stirring rod in the mixing tank of fig. 1 and the central transmission rod of the transmission unit.

Fig. 3 is a schematic structural view of the conveying unit shown in fig. 1.

Fig. 4 is a left side view of the separator of fig. 3 in cross section.

Fig. 5 is a schematic structural view of a water injection unit.

FIG. 6 is a schematic view of the structure of the blow hole.

FIG. 7 is a plan view showing the distribution of the blow holes.

Fig. 8 is a schematic diagram illustrating the composition of the overall control unit in embodiment 1 of the present invention.

FIG. 9 is a schematic diagram of the structure of a starch sizing system according to example 2 of the present invention.

Description of the labeling:

11. a metering tank; 12. a conveying unit; 13. a slurry mixing tank; 111. a feeding port; 112. a discharge outlet; 121. a first drive mechanism; 122. a drive conversion unit; 123. a feeding port; 124. a discharge port; 125. a water storage tank; 131. a second stirring rod; 132. a second stirring blade; 133. a feed inlet; 134. a pulp discharge port; 135. a slurry discharge valve; 136. a pressure discharge port; 21. a central transmission rod; 211. a helical groove; 22. a drive gear; 31. a material distributing valve; 32. a second drive mechanism; 33. a water inlet; 41. a partition plate; 42. a water injection unit 42; 43. the first stirring rod 43;431 a first stirring blade; 44. a water spray hole; 45. a nozzle; 51. a lower edge of the baffle; 52. a support platform; 53. a pressure pump; 54. a first water delivery pipe; 55. a second water delivery pipe; 56. a water delivery tank; 551. a water delivery control valve; 61. a hollow shaft; 62. a solid bar; 63. a water injection port; 64. a sealing unit; 65 water storage space; 66 hollowing out the holes; 641. a baffle plate; 642. sealing the space; 71. a gas blowing hole; 72. an air supply hose; 73. the center line of the air blowing hole; 74. the center line of the center transmission rod; 75. and (4) an included angle.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It should be apparent that the described embodiments are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.

Example 1

A starch size mixing system, as shown in fig. 1-7, comprises a metering tank 11, a conveying unit 12 and a size mixing tank 13; the metering tank 11 is provided with a feeding port 111 for feeding the starch raw material, a discharging port 112 of the metering tank 11 is connected with a feeding port 123 of the conveying unit 12, a discharging port 124 of the conveying unit 12 is connected with a feeding port 133 of the slurry mixing tank 13, and the slurry mixing tank 13 is provided with a water inlet 33, a pressure discharging port 136 and a slurry discharging port 134 for discharging the starch slurry;

the pipeline of the conveying unit 12 is internally provided with a spiral conveying area and a pre-slurry mixing area in sequence along the material conveying direction, a spiral conveying mechanism is arranged in the spiral conveying area, and a first stirring mechanism and a water spraying mechanism are arranged in the pre-slurry mixing area.

In one embodiment, the pipeline of the conveying unit 12 has a central transmission rod 21 penetrating through the central portions of the screw conveying area and the pre-slurry mixing area and driven to rotate by a first driving mechanism 121, the screw conveying mechanism is disposed around the central transmission rod 21, and one end of the first stirring mechanism is disposed on the central transmission rod 21.

Optionally, the ratio of the length of the central transmission rod 21 in the spiral transmission area to the length of the pre-slurry mixing area is 1 to 1, and is preferably 1:2.

As one mode, a partition plate 41 is arranged between the spiral conveying area and the pre-slurry mixing area, the upper end of the partition plate 41 is arranged on the top wall of the pipeline of the conveying unit 12, the central transmission rod 21 vertically penetrates through the partition plate 41, and the lower edge 51 of the partition plate is suspended below the central transmission rod 21.

The partition plate 41 is arranged above the central transmission rod 21 to form a partition, and is in an open communication state below the central transmission rod, so that starch and water for size mixing in a pre-size mixing area are prevented from being mixed into a spiral transmission area at the front end, and starch conveyed from the spiral transmission area at the front end is transferred to a pre-size mixing area at the rear end, and the starch raw material conveying is prevented from being influenced. Optionally, the area of the baffle 41 is 2/3 of the interface between the spiral conveying region and the pre-slurry region.

In one form, the first stirring mechanism includes a first stirring rod 43 and a first stirring blade 431, and one end of the first stirring rod 43 is fixed to the central transmission rod 21, and the other end is connected to the first stirring blade 431.

Optionally, the first stirring blade 431 is arc-shaped, and the radian of the arc-shaped is matched with that of the inner wall of the pipeline in the pre-slurry mixing area. This arrangement facilitates the first stirring blade 431 to stir and mix the starch staying below the pre-slurry mixing area.

Above-mentioned first stirring vane 431's radian with the circumference at the regional pipeline inner wall place of pre-mixing has the same centre of a circle, and first stirring vane 431's outermost surface and pipeline inner wall's surperficial seamless contact are favorable to first stirring vane 431 to strike off the pipeline inner wall material, further are favorable to the stirring.

Optionally, a plurality of first stirring mechanisms are arranged in the pre-pulping area, and one end of the first stirring rod 43 is symmetrically or alternatively arranged on the central transmission rod 21.

Two or more first stirring mechanisms can be arranged on the same circumferential direction, for example, 2, 3 or 4 first stirring mechanisms can be arranged on the same circumferential direction, so that any position of the inner wall of the pipeline of the pre-slurry adjusting area can be stirred without dead angles.

In one mode, the water spraying mechanism includes a plurality of nozzles 45 disposed on an inner wall of the pipe of the pre-slurry mixing area, the nozzles 45 are connected to a water delivery tank 56 disposed in the conveying unit 12, and the water delivery tank 56 is connected to a water storage tank 125 disposed above the conveying unit 12 through a pressure pump 53 and a first water delivery pipe 54.

The water storage tank 125 increases the pressure of the slurry-mixing water to a certain pressure by the pressure pump 53 installed on the first water pipe 54, and then the slurry-mixing water is transferred to the water transfer tank 56 through the first water pipe 54, and the slurry-mixing water with a certain pressure is sprayed to the pre-slurry-mixing area through the nozzle 45 to be mixed with the starch.

The nozzles 45 may be arranged in 4~8, for example 6, equally spaced around the same circumference.

Optionally, the nozzle 45 is oval shaped with the major axis of the oval being parallel to the central drive rod 21. So set up and be convenient for rotate at central drive rod 21 and carry out the in-process of preliminary mixing thick liquid, nozzle 45 spouts to the size mixing water of preliminary mixing thick liquid interval and is roughly rectangular shape to the contact surface of increase size mixing water and starch does benefit to the mixture degree of consistency of size mixing water and starch.

Optionally, the reservoir 125 is placed on a support platform 52 secured to the outside top of the conveyor unit 12.

In one mode, the central transmission rod 21 is a solid rod 62 at the spiral transmission area, a hollow rod 61 at the pre-slurry mixing area, a water injection unit 42 is arranged at the joint of the hollow rod 61 and the solid rod 62 and extends towards one side of the hollow rod 61, a water injection port 63 of the water injection unit 42 is connected with a water storage tank 125 arranged above the conveying unit 12 through a pressure pump 53 and a second water pipe 55, a water outlet is connected with the hollow rod 61, the water injection mechanism further comprises a water injection hole 44, and the water injection hole 44 is arranged on the peripheral wall of the hollow rod 61.

The arrangement of the water spray holes 44 further improves the mixing uniformity of the starch and the size mixing water, and improves the efficiency and the quality of starch pre-size mixing.

Optionally, the water spray holes 44 are staggered with the nozzles 45.

Optionally, the water spray holes 44 are elliptical holes with the major axis parallel to the central drive rod 21.

Alternatively, the water jets 44 are distributed along the hollow bar 61 in a single row or in parallel rows.

It should be understood that the hole position of the water spraying hole 44 is avoided from the position where the first stirring rod 43 is installed.

Optionally, the first water pipe 54 and the second water pipe 55 are provided with a water delivery control valve 551 for adjusting flow rate.

In one aspect, the water filling unit 42 includes a sealed space 642, a water storage space 65 provided on an inner periphery of the sealed space 642, and a stopper 641, and the water storage space 65 communicates with the water filling port 63;

a plurality of hollow holes 66 are formed in the circumferential wall of the hollow rod 61 in the water storage space 65 in a staggered manner, one end of the baffle 641 is fixed to the hollow rod 61 at the front end and the rear end of the hollow hole 66, the other end extends to the sealed space 642, and the sealed space 642 is filled with a waterproof sealing material with a low friction coefficient.

The sealing material mainly serves to seal the contact position of the sealing unit 64 and the hollow rod 61, and prevent the liquid in the water storage section 65 from penetrating into the sealing space 642.

The specific arrangement manner of the hollow holes 66 may be that 6 to 10 hollow holes 66, for example, 8, are uniformly distributed and distributed on the hollow rod 61 located in the water storage space 65 at intervals.

The shape of the hollow-out hole 66 may be circular.

When the water storage space 65 is filled with the slurry mixing water, the hollow rod 61 rotates, the slurry mixing water can enter the hollow rod 61 from the hollow hole 66, and when the slurry mixing water has certain pressure, the slurry mixing water entering the hollow rod 61 can be sprayed out from the water spraying hole 44 formed in the hollow rod 61.

The flap 641 rotates in the sealed space 642 synchronously during the rotation of the hollow rod 61.

Referring to FIG. 5, the baffles 641 further prevent the liquid in the water holding space 65 from seeping out.

The baffle 641 and the hollow rod 61 are integrated, so that the liquid in the water storage space 65 cannot leak from the joint of the baffle 641 and the hollow rod 61. When the sealing material is not filled, the liquid in the water holding space 65 needs to bypass the stopper 641 to leak, and when the sealing material is further filled in the sealing space 642, the liquid in the water holding space 65 may leak only after passing through the sealing material and bypassing the stopper 641. Without the flap 641, the liquid in the water holding space 65 could leak directly from the connection between the sealing unit 64 and the hollow rod 61.

The sealing material wraps the stopper 641, but the sealing material leaves a small gap at the position where the sealing material contacts the stopper 641, so that the stopper 641 can rotate conveniently without interfering with the sealing material.

Optionally, in order to save conveying power and better convey starch and starch slurry after pre-slurry mixing, the conveying unit 12 is inclined downward by 5 ° to 10 ° from the material inlet 123 to the material outlet 124. Alternatively, the metering tank 11 is installed at a height higher than that of the conveying unit 12. This facilitates the transfer of the starch in the metering tank 11 into the conveying unit 12 by means of the height difference, saving power.

As a mode, in order to ensure that the starch smoothly enters the pre-pulping area at the rear end, a plurality of air blowing holes 71 are arranged on the pipeline wall of the conveying unit 12 below the partition plate 41, and the air blowing holes 71 are connected with the air blowing unit through an air supply hose 72.

Specifically, three groups of air blowing holes 71 are arranged in parallel in a direction parallel to a central axis of the center driving rod 21 or in a direction perpendicular to the center driving rod 21, for example, 6 to 10, for example, 8 air blowing holes are arranged in each group in the direction perpendicular to the center driving rod 21, and each group of air blowing holes 71 is uniformly distributed on a pipeline arc surface of the lower edge 51 of the partition board 41.

Optionally, the angle 75 between the centre line 74 of the blow hole and the centre line 74 of the central drive rod is 20 ° -45 °, for example 30 °.

The arrangement further ensures that the air blown out from the air blowing holes 71 is blown to the pre-size mixing area at the rear end, so that the starch conveyed to the pre-size mixing area can smoothly enter the pre-size mixing area at the rear end, and when the starch enters the pre-size mixing area, the starch is mixed with the size mixing water sprayed from the water spraying holes 44 and the nozzles 45.

Since the nozzle 45 and/or the water spray hole 44 continuously spray the conditioning water with a certain pressure, which is higher than the pressure of the pre-conditioning area, the material in the pre-conditioning area can not reversely enter the water spray hole 44 and the nozzle 45.

Also, since the air blowing holes 71 are continuously blown by the air, the starch in the pipe of the conveying unit 12 does not enter the air blowing holes 71.

The starch slurry primarily mixed by the pre-mixing structure at the rear end of the transmission unit is discharged from the discharge port 124 of the conveying unit 12 to the mixing tank 13 for formal mixing treatment.

A second stirring mechanism driven by a second driving mechanism 32 is arranged in the slurry mixing tank 13, the second stirring mechanism comprises a second stirring rod 131 and a second stirring blade 132, one end of the second stirring rod 131 is connected with the spiral groove 211 of the central transmission rod 21 through a driving gear 22 to form a driving conversion unit 122, and the other end of the second stirring rod is connected with the second stirring blade 132. The arrangement is such that the rotation speed of the second stirring rod 131 in the size mixing tank 13 is consistent with the rotation speed of the central transmission rod 21 of the conveying unit 12.

In the size mixing tank 13, the amount of the size mixing water fed from the water inlet 33 and the mixing time of the second mixing mechanism are controlled, and the starch slurry pre-prepared by the transfer unit 12 is further prepared into a starch size mixture required in the subsequent process. The prepared slurry is discharged from a slurry outlet 134 below the slurry mixing tank 13 to a downstream tank for standby, wherein the discharge amount and discharge speed of the slurry are controlled by a slurry discharge valve 135 provided below the slurry outlet 134.

The pressure discharge port 136 arranged at the upper part of the size mixing tank 13 is used for adjusting the pressure in the size mixing tank 13 and maintaining the pressure to be constant.

The starch size mixing system is a full-automatic system, and is provided with a master control unit for regulating and controlling a metering tank 11, a conveying unit 12, a size mixing tank 13 and controllable opening and closing or action elements arranged on pipelines among the metering tank, the conveying unit and the size mixing tank;

the master control unit comprises a feeding control module, a conveying unit control module, a water spraying control module, a blowing control module, a stirring control module and a size mixing control module.

The controllable opening, closing or actuating elements include a metering tank 11, a delivery unit 12, a stirring mechanism in a size mixing tank 13, a water spraying mechanism, a central transmission rod 21, a water delivery control valve 551 arranged on a pipeline, a pump or a metering element, and the like.

The specific connection control scheme of the above-mentioned module and the controllable opening/closing or actuating element may adopt conventional means in the prior art, and those skilled in the art can flexibly adopt the scheme, and the detailed description is omitted.

A starch size mixing method is based on the starch size mixing system, the starch size mixing method carries out size mixing in a size mixing area of a conveying unit 12 which conveys raw starch from a metering tank 11 to a size mixing tank 13, and then the raw starch enters the size mixing tank 13 for size mixing to obtain uniform and non-caking starch size.

Example 2

The difference from the embodiment 1 is that, as shown in fig. 9, the starch slurry mixing system is provided with a plurality of slurry mixing tanks 13, and the discharge port 124 of the conveying unit 12 is connected with the feed port 133 of each slurry mixing tank 13 through the material distributing valve 31.

The second stirring mechanism of each size mixing tank 13 is controlled by a separately provided second driving mechanism 32. The water inlet 33 and the pressure discharge port 136 of each slurry mixing tank 13 are respectively and independently arranged.

Referring to fig. 9, the starch slurry pre-slurried by the conveying unit 12 is transferred to the left slurry blending tank 13 for slurry blending. When the left-side mixing tank 13 does not complete mixing and the starch slurry which is subjected to pre-mixing in the conveying unit 12 needs to be transferred, the starch slurry can be transferred to the right-side mixing tank for mixing through the material distributing valve 31.

This embodiment can make full use of the transfer unit 12 for pre-conditioning the slurry, improving overall efficiency.

Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A starch size mixing system is characterized by comprising a metering tank (11), a conveying unit (12) and a size mixing tank (13); the starch blending device is characterized in that the metering tank (11) is provided with a feeding port (111) for feeding starch raw materials, a discharging port (112) of the metering tank (11) is connected with a feeding port (123) of the conveying unit (12), a discharging port (124) of the conveying unit (12) is connected with a feeding port (133) of the starch blending tank (13), and the starch blending tank (13) is provided with a water inlet (33), a pressure discharging port (136) and a starch discharging port (134) for discharging starch slurry;

the pipeline of conveying unit (12) is inside to set gradually spiral transmission region and preliminary mixing thick liquid region along material direction of delivery, establish screw conveyor in the spiral transmission region and construct, establish first rabbling mechanism and water spray mechanism in the preliminary mixing thick liquid region.

2. The starch mixing system according to claim 1, wherein the pipeline of the conveying unit (12) is provided with a central transmission rod (21) which penetrates through the central parts of the spiral conveying area and the pre-mixing area and can be driven to rotate by a first driving mechanism (121), the spiral conveying mechanism is arranged on the central transmission rod (21) in a surrounding manner, and one end of the first stirring mechanism is arranged on the central transmission rod (21);

optionally, the ratio of the length of the central transmission rod (21) in the spiral transmission area to the length of the pre-sizing area is 1 to 1, and is preferably 1:2.

3. The starch mixing system according to claim 2, characterized in that a partition (41) is arranged between the spiral conveying area and the pre-mixing area, the upper end of the partition (41) is arranged on the top wall of the pipeline of the conveying unit (12), and the central driving rod (21) vertically penetrates through the partition (41), and the lower edge (51) of the partition is suspended below the central driving rod (21);

optionally, the area of the baffle (41) is 2/3 of the interface between the spiral conveying region and the pre-slurry region.

4. The starch conditioning system according to claim 2, wherein the first stirring mechanism comprises a first stirring rod (43) and a first stirring blade (431), one end of the first stirring rod (43) is fixed on the central transmission rod (21), and the other end is connected with the first stirring blade (431);

optionally, the first stirring blade (431) is arc-shaped, and the radian of the arc-shaped is matched with the radian of the inner wall of the pipeline in the pre-slurry mixing area so that the outer surface of the first stirring blade (431) is in seamless contact with the inner wall of the pipeline;

optionally, a plurality of first stirring mechanisms are arranged in the pre-pulping area, and one ends of the first stirring rods (43) are symmetrically or alternatively arranged on the central driving rod (21) at intervals.

5. The starch mixing system according to claim 2, characterized in that the water spraying mechanism comprises a plurality of nozzles (45) arranged on the inner wall of the pipeline of the pre-mixing area, the nozzles (45) are connected with a water conveying tank (56) arranged in the conveying unit (12), and the water conveying tank (56) is connected with a water storage tank (125) arranged above the conveying unit (12) through a pressure pump (53) and a first water conveying pipe (54);

optionally, the nozzle (45) is elliptical and the major axis of the ellipse is parallel to the central drive rod (21);

optionally, the reservoir (125) is placed on a support platform (52) fixed on top of the outside of the conveyor unit (12).

6. The starch mixing system according to claim 5, wherein the central transmission rod (21) is a solid rod (62) at the part of the spiral transmission area and a hollow rod (61) at the part of the pre-mixing area, a water injection unit (42) is arranged at the joint of the hollow rod (61) and the solid rod (62) in a manner of extending towards one side of the hollow rod (61), a water injection port (63) of the water injection unit (42) is connected with a water storage tank (125) arranged above the conveying unit (12) through a pressure pump (53) and a second water pipe (55), a water outlet of the water injection unit is connected with the hollow rod (61), the water injection mechanism further comprises a water injection hole (44), and the water injection hole (44) is arranged on the peripheral wall of the hollow rod (61);

optionally, the water spray holes (44) are staggered with the nozzles (45);

optionally, the water spray holes (44) are elliptical holes with their long axes parallel to the central drive rod (21);

optionally, the water spray holes (44) are distributed along the hollow bar (61) in a single row or in parallel rows;

optionally, the first water pipe (54) and the second water pipe (55) are provided with water delivery control valves (551) for adjusting flow rates.

7. The starch conditioning system according to claim 6, wherein the water injection unit (42) comprises a sealed space (642), a water storage space (65) arranged on the inner periphery of the sealed space (642), and a baffle plate (641), wherein the water storage space (65) is communicated with the water injection port (63);

a plurality of hollow holes (66) which are arranged in a staggered mode are formed in the peripheral wall of the hollow rod (61) in the water storage space (65), one end of the baffle plate (641) is fixed on the hollow rod (61) at the front end and the rear end of the position of each hollow hole (66), the other end of the baffle plate extends to the sealed space (642), and the sealed space (642) is filled with waterproof sealing materials with low friction coefficient.

Optionally, the sealing material is made of butadiene-acrylonitrile rubber, chloroprene rubber or polytetrafluoroethylene, and further preferably polytetrafluoroethylene;

optionally, the conveying unit (12) is inclined downwards by 5-10 degrees from the feeding port (123) to the discharging port (124);

optionally, the metering tank (11) is mounted at a height higher than the mounting height of the delivery unit (12).

8. The starch conditioning system according to claim 3, characterized in that a plurality of air blowing holes (71) are arranged on the pipeline wall of the conveying unit (12) below the partition plate (41), and the air blowing holes (71) are connected with an air blowing unit through an air supply hose (72);

optionally, the included angle (75) between the central line (73) of the blowing hole and the central line (74) of the central transmission rod is 20-45 degrees, and preferably 30 degrees.

9. The starch mixing system according to any one of claims 1-8, wherein a second stirring mechanism driven by a second driving mechanism (32) is arranged in the mixing tank (13), the second stirring mechanism comprises a second stirring rod (131) and a second stirring blade (132), one end of the second stirring rod (131) is connected with the spiral groove (211) of the central driving rod (21) through a driving gear (22) to form a driving conversion unit (122), and the other end is connected with the second stirring blade (132);

optionally, the starch size mixing system is provided with a plurality of size mixing tanks (13), and the discharge port (124) of the conveying unit (12) is connected with the feed port (133) of each size mixing tank (13) through a material distributing valve (31);

optionally, the starch size mixing system is provided with a master control unit for regulating and controlling a metering tank (11), a conveying unit (12), a size mixing tank (13) and controllable opening and closing or action elements arranged on pipelines among the metering tank, the conveying unit and the size mixing tank;

10. A starch sizing method, based on the starch sizing system of any one of claims 1 to 9, characterized in that the starch sizing method is implemented by pre-sizing in a pre-sizing area of a conveying unit (12) for conveying raw starch from a metering tank (11) to a sizing tank (13), and then the raw starch enters the sizing tank (13) for final sizing to obtain uniform and non-agglomerated starch size.