Starch slurry and residue separation and dehydration system

Abstract

The starch slurry and residue separation and dehydration system comprises a slurry storage pool arranged on a mounting frame, a slurry discharging opening is formed in the bottom of the slurry storage pool, a screen assembly is obliquely arranged above the slurry storage pool, a driving mechanism used for driving the screen assembly to swing is further arranged on the mounting frame, and the driving mechanism is arranged at the higher end of the screen assembly. A discharging opening is formed in the lower end of the screen assembly, a screw extruder is arranged at the lower end of the discharging opening, a liquid collecting barrel is further arranged, a liquid discharging opening of the screw extruder is communicated with the liquid collecting barrel through a water pipe, starch milk is formed after starch raw pulp is filtered through the screen assembly and then enters the pulp storage pool, and the starch milk in the pulp storage pool is discharged out of the pulp discharging opening. Solid residues formed after starch primary pulp discharged from the discharge port passes through the screw extruder are discharged from the tail end of the screw extruder, formed liquid is discharged into the liquid collecting barrel through the liquid discharge port, and the problems that in the prior art, when a vertical centrifugal screen is adopted for filtering, efficiency is low, and cost is high are solved.

Description

Technical Field

[0001] The present invention belongs to the field of starch production equipment, and particularly relates to a starch slurry residue separation and dehydration system. Background Art

[0002] With the increasing awareness of people's pursuit of healthy food, the processing of sweet potato starch has developed rapidly. In particular, small processing plants have sprung up like mushrooms, and the processing equipment market is very active. At present, vertical centrifugal screens are commonly used in the industry for the slurry residue separation link during the processing. However, there are many problems in the actual operation process:

[0003] 1. Inconvenient to operate: When the slurry is too thin, the vertical centrifugal screen is prone to cause starch loss, resulting in excessive raw material loss. On the contrary, when it is too thick, it is easy to block the screen mesh and requires timely shutdown for dredging. Therefore, it is very difficult for the vertical centrifugal screen to achieve a normal, continuous and stable working state during production. In addition, when multiple devices work simultaneously, multiple staff members are required to assist in the operation.

[0004] 2. High energy consumption: Each centrifugal screen is equipped with two electric motors. The higher the output, the more centrifugal screens are required, and the greater the energy consumption.

[0005] 3. Large water consumption: The more centrifugal screens are equipped, the greater the water supply. The water consumption per ton of starch reaches about 35 tons.

[0006] 4. High investment cost: After the slurry residue is separated, due to the high water content of the residue, equipment such as pumps (slurry pumps and pressing pumps), filter presses, and dryers also need to be equipped.

[0007] Based on the above problems, the starch slurry residue separation technology still needs to be further improved. Summary of the Invention

[0008] The purpose of the present invention is to propose a starch slurry residue separation and dehydration system to solve the problems in starch production using centrifugal screens in the prior art.

[0009] To achieve the above object, the present invention adopts the following technical solutions: A starch slurry residue separation and dehydration system, including a mounting frame, on which a slurry storage tank is provided. A slurry discharge port is provided at the bottom of the slurry storage tank. A screen assembly is inclined above the slurry storage tank. A driving mechanism is also provided on the mounting frame, which is used to drive the screen assembly to swing. The driving mechanism is arranged at the higher end of the screen assembly. A discharge port is provided at the lower end of the screen assembly. A screw extruder is provided at the lower end of the discharge port. The feed port of the screw extruder corresponds to the discharge port of the screen assembly. A liquid collection bucket is also provided. The liquid discharge port of the screw extruder is connected to the liquid collection bucket through a water pipe. The starch raw slurry forms starch milk after being filtered by the screen assembly and then enters the slurry storage tank. The starch milk in the slurry storage tank is discharged from the slurry discharge port. The solid residue formed after the starch raw slurry discharged from the discharge port passes through the screw extruder is discharged from the end of the screw extruder, and the formed liquid is discharged into the liquid collection bucket through the liquid discharge port.

[0010] As a further description of the above technical solution: A slurry conveying pipe is provided above the screen assembly. A slurry feeding port is provided between the slurry conveying pipe and the screen assembly. The liquid collection bucket is connected to the slurry feeding port through a circulating water pipe, and a water pump is provided on the circulating water pipe.

[0011] As a further description of the above technical solution: The screen assembly includes a mounting frame, which is inclined. The four corners of the mounting frame are suspended on the mounting frame by chains. The mounting frame is located above the opening of the slurry storage tank. A filter screen is provided inside the mounting frame, and a vibration motor is also provided on the mounting frame.

[0012] As a further description of the above technical solution: Vibration motors are provided above and below the mounting frame. A positioning frame is slidably provided on the mounting frame, and the positioning frame can be fixed at any position within the sliding range. The vibration motor is fixedly provided on the positioning frame, and a protective cover is provided on the vibration motor provided below the mounting frame.

[0013] As a further description of the above technical solution: The filter screen is provided with two layers, namely a fixed filter screen and a movable filter screen. The fixed filter screen is fixedly provided on the mounting frame. The movable filter screen is provided above the fixed filter screen and is in contact with each other. The movable filter screen is slidably provided along the length direction of the mounting frame.

[0014] As a further description of the above technical solution: The driving mechanism includes a swing arm, a transmission wheel and a driving motor. One end of the swing arm is rotatably connected to the screen assembly, and the other end is rotatably connected to the eccentric shaft of the transmission wheel. The rotating shaft of the transmission wheel is belt-driven with the output shaft of the driving motor.

[0015] As a further description of the above technical solution: An isolation cover is provided above the slurry storage tank, and the screen assembly is located inside the isolation cover.

[0016] As a further description of the above technical solution: the slurry outlet is strip-shaped and is directly above the higher end of the screen assembly.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0018] (1) The system provided by the present application extends the residence time of the raw starch slurry on the sieve through a rectangular lengthened filter screen, achieving the normal dehydration time of the raw starch slurry, reducing the water content of impurities after filtering the raw starch slurry. The vibration motor arranged on the filter screen assembly can increase the jitter of the installation frame and the filter screen in the vertical direction, and cooperate with the reciprocating screen to accelerate the filtration of the raw starch slurry.

[0019] (2) One driving motor drives the screen assembly to vibrate reciprocally, which can replace multiple centrifugal screens in the prior art. After calculation, for the same output of starch milk, the present application can save 8% to 10% of the power. Among multiple centrifugal screens in the prior art, each centrifugal screen is equipped with a dedicated water supply device, while the present application only needs a set of water supply devices to meet the actual production needs. After calculation, for the same output of starch milk, the present application can save about 60% of the water consumption.

[0020] (3) The screen of the present application is long, and is less affected by the size of the slurry concentration during the process of separating the raw starch slurry from the pulp and residue, and there is no phenomenon of starch loss. It can minimize the overflow of part of the raw starch slurry from the sieve body during the separation process to a greater extent, so as to achieve the purpose of improving the starch yield rate in the later stage. After reasonable use of a screw extruder to squeeze the impurities again and squeeze them dry, the extruded liquid is subjected to "secondary filtration", so that no "direct discharge" process will occur in all links during the production of the system, reducing losses and significantly improving economic benefits.

[0021] (3) A double-layer filter screen is adopted, and the upper movable filter screen moves relative to the fixed filter screen under the action of the reciprocating movement of the installation frame and the vibration motor, which can prevent the filter screen from being blocked. Description of the Drawings

[0022] Figure 1 It is a side view of the present invention, with the isolation cover not shown;

[0023] Figure 2 It is a three-dimensional structure schematic diagram of the present invention;

[0024] Figure 3 It is a three-dimensional structure schematic diagram of the present invention, with the isolation cover not shown;

[0025] Figure 4 It is a three-dimensional structure schematic diagram of the filter screen assembly of the present invention;

[0026] Figure 5 It is a three-dimensional structure schematic diagram of the positioning frame of the present invention;

[0027] Figure 6 This is a schematic diagram of the double-layer filter structure of the present invention.

[0028] Legend: 1. Mounting frame; 2. Pulp storage tank; 3. Pulp discharge port; 4. Screen assembly; 5. Mounting frame; 6. Chain; 7. Fixed filter; 8. Movable filter; 9. Fixed groove; 10. Sliding frame; 11. Vibration motor; 12. Positioning frame; 13. Protective cover; 14. Kidney-shaped hole; 15. Positioning bolt; 16. Locking nut; 17. Driving mechanism; 18. Swing arm; 19. Transmission wheel; 20. Driving motor; 21. Discharge port; 22. Screw extruder; 23. Feed port; 24. Liquid collection bucket; 25. Pulp conveying pipe; 26. Pulp conveying port; 27. Circulating water pipe; 28. Isolation cover. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1-6 , the present invention provides a technical solution for a starch pulp residue separation and dehydration system:

[0031] A starch pulp residue separation and dehydration system is used for filtering and separating starch raw pulp. The starch raw pulp is a slurry mixture formed by mixing washed and crushed sweet potatoes (or other raw materials) with water, containing impurities such as starch granules, fibers, and cell debris. The state of the starch raw pulp is viscous, turbid, and has many suspended matters.

[0032] A starch pulp residue separation and dehydration system includes a mounting frame 1, which is welded by food-grade 304 stainless steel. The mounting frame 1 is in an overall rectangular frame structure. A pulp storage tank 2 is arranged along the length direction inside the mounting frame 1. In this embodiment, the pulp storage tank 2 is in a semi-cylindrical shape, with an open upper end. The pulp storage tank 2 is made of food-grade 304 stainless steel. A pulp discharge port 3 is arranged at the bottom of the pulp storage tank 2, and the pulp discharge port 3 is connected to a pipeline pump to directly transport the starch milk to a hydrocyclone.

[0033] Above the slurry storage tank 2, a screen assembly 4 is inclined. The screen assembly 4 includes a mounting frame 5 which is inclined. The four corners of the mounting frame 5 are suspended on the mounting rack 1 by chains 6, and the inclination angle of the mounting frame 5 can be adjusted by the length of the chains 6. In this embodiment, the left side of the mounting frame 5 is higher and the right side is lower. The top view projection of the mounting frame 5 is within the top view projection range of the upper opening of the slurry storage tank 2. A filter screen is arranged in the mounting frame 5, and the filter screen has two layers, namely a fixed filter screen 7 and a movable filter screen 8. The fixed filter screen 7 is fixedly arranged on the mounting frame 5, and the movable filter screen 8 is arranged above the fixed filter screen 7 and in contact with each other. The movable filter screen 8 is slidably arranged along the length direction of the mounting frame 5. Specifically, a fixing groove 9 is formed on the inner peripheral side of the mounting frame 5, the fixed filter screen 7 is fixed in the fixing groove 9, the movable filter screen 8 is fixed on a sliding frame 10, the length of the sliding frame 10 is less than the length of the mounting frame 5, and the width of the sliding frame 10 is adapted to the width of the mounting frame 5. The sliding frame 10 is slidably arranged in the fixing groove 9 and slides left and right along the fixing groove 9 of the mounting frame 5. The movable filter screen 8 is in contact with the fixed filter screen 7, and both the movable filter screen 8 and the fixed filter screen 7 are 80-mesh screens.

[0034] Vibration motors 11 are arranged above and below the mounting frame 5. A positioning frame 12 is slidably arranged on the mounting frame 5, and the positioning frame 12 can be fixed at any position within the sliding range. The vibration motors 11 are fixedly arranged on the positioning frame 12, and a protective cover 13 is arranged on the vibration motor 11 arranged below the mounting frame 5. The arranged protective cover 13 prevents starch milk from entering the vibration motor 11. Specifically, a waist-shaped hole 14 is formed along the length direction of the mounting frame 5 on the positioning frame 12, a positioning bolt 15 is fixedly arranged on the mounting frame 5, and the positioning bolt 15 is located in the waist-shaped hole 14. After adjusting the position of the positioning frame 12, the positioning frame 12 is locked by a locking nut 16. In this embodiment, four vibration motors 11 are arranged on the positioning frame 12, two of which are arranged above the mounting frame 5 and the other two are arranged below the mounting frame 5. Among them, the two vibration motors 11 located above are symmetric about the front and back of the mounting frame 5, and the two vibration motors 11 located below are symmetric about the front and back of the mounting frame 5.

[0035] A driving mechanism 17 is further arranged on the mounting rack 1. The driving mechanism 17 is used to drive the screen assembly 4 to swing. The driving mechanism 17 is arranged at the higher end of the screen assembly 4. Specifically, the driving mechanism 17 is arranged at the left end of the mounting frame 5. The driving mechanism 17 includes a swing arm 18, a transmission wheel 19 and a driving motor 20. One end of the swing arm 18 is rotatably connected to the screen assembly 4, and the other end is rotatably connected to the eccentric shaft of the transmission wheel 19. The rotating shaft of the transmission wheel 19 and the output shaft of the driving motor 20 are in belt transmission.

[0036] The lower end of the screen assembly 4 is provided with a discharge port 21. Specifically, the discharge port 21 is arranged at the right end of the installation frame 5. A screw extruder 22 is arranged at the lower end of the discharge port 21. The feed inlet 23 of the screw extruder 22 corresponds to the discharge port 21 of the screen assembly 4. A liquid collecting bucket 24 is also provided. The liquid discharge port of the screw extruder 22 is communicated with the liquid collecting bucket 24 through a water pipe. A slurry conveying pipe 25 is arranged above the screen assembly 4. The slurry conveying pipe 25 is used for conveying starch slurry. A slurry conveying port 26 is arranged between the slurry conveying pipe 25 and the screen assembly 4. The slurry conveying port 26 is strip-shaped, so that the starch slurry can be evenly discharged along the width direction of the filter screen. The slurry conveying port 26 is directly above the left end of the installation frame 5. The liquid collecting bucket 24 is communicated with the slurry conveying port 26 through a circulating water pipe 27. A water pump (not shown in the figure) is arranged on the circulating water pipe 27.

[0037] An isolation cover 28 is arranged above the slurry storage tank 2. The screen assembly 4 is located inside the isolation cover 28.

[0038] The starch slurry in the slurry conveying pipe 25 is discharged from the slurry conveying port 26. After being filtered by the screen assembly 4 to form starch milk, it enters the slurry storage tank 2. The starch milk in the slurry storage tank 2 is discharged from the slurry discharge port 3. The slurry discharge port 3 is connected to a pipeline pump to directly convey the starch milk to a hydrocyclone. Then, the next process is carried out. The solid residue formed after the starch slurry discharged from the discharge port 21 passes through the screw extruder 22 is discharged from the end of the screw extruder 22. The formed liquid is discharged into the liquid collecting bucket 24 through the liquid discharge port. The liquid in the liquid collecting bucket 24 is then discharged from the slurry conveying port 26 through a water pipe for secondary filtration.

[0039] When the starch slurry is filtered through the filter screen assembly, the driving motor 20 works. Under the action of the swing arm 18 and the transmission wheel 19, the installation frame 5 swings left and right reciprocally. At the same time, the vibration motor 11 located at the right end vibrates, so that the starch slurry starts to be filtered from the upper inclined end of the filter screen. The filtered starch slurry flows into the slurry storage tank 2. Impurities such as starch granules, fibers, and cell debris located above the filter screen stay on the filter screen. Under the action of the vibration motor 11 and the driving motor 20, the above impurities flow towards the discharge port 21. Among them, according to the length of the filter screen and the output of the starch slurry, the position of the vibration motor 11 is adjusted to control the flow rate and state of the starch slurry filtered on the filter screen.

[0040] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art of this technology, within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, equivalent replacement or change should be covered within the protection scope of the present invention.

Claims

1. A starch slurry separation and dehydration system, characterized in that The invention comprises a mounting frame (1), wherein a pulp storage pool (2) is arranged on the mounting frame (1), a pulp discharge port (3) is arranged at the bottom of the pulp storage pool (2), a screen assembly (4) is arranged obliquely above the pulp storage pool (2), and a driving mechanism (17) is also arranged on the mounting frame (1), the driving mechanism (17) is used to drive the screen assembly (4) to swing, the driving mechanism (17) is arranged at the higher end of the screen assembly (4), a discharge port (21) is arranged at the lower end of the screen assembly (4), a screw extruder (22) is arranged at the lower end of the discharge port (21), and the screw extruder (22) is provided with a feed port (21) at the lower end of the discharge port (21). The material port (23) corresponds to the discharge port (21) of the screen assembly (4), and a liquid collecting barrel (24) is also provided. The discharge port of the screw extruder (22) is connected to the liquid collecting barrel (24) through a water pipe. The starch slurry is filtered through the screen assembly (4) to form starch milk, which then enters the slurry storage tank (2). The starch milk in the slurry storage tank (2) is discharged through the discharge port (3). The solid residue formed after the starch slurry discharged from the discharge port (21) passes through the screw extruder (22) is discharged from the end of the screw extruder (22), and the formed liquid is discharged from the discharge port into the liquid collecting barrel (24).

2. A starch slurry separation and dehydration system according to claim 1, characterized in that: A slurry delivery pipe (25) is arranged above the screen assembly (4), a slurry delivery port (26) is arranged between the slurry delivery pipe (25) and the screen assembly (4), the liquid collecting bucket (24) and the slurry delivery port (26) are connected via a circulating water pipe (27), and a water pump is arranged on the circulating water pipe (27).

3. A starch slurry separation and dehydration system according to claim 2, characterized in that: The screen assembly (4) comprises a mounting frame (5), the mounting frame (5) is arranged at an angle, the four corners of the mounting frame (5) are suspended on the mounting frame (1) through chains (6), the mounting frame (5) is located above the opening of the slurry storage tank (2), a filter is arranged in the mounting frame (5), and a vibration motor (11) is also arranged on the mounting frame (5).

4. A starch slurry separation and dehydration system according to claim 3, characterized in that: A vibration motor (11) is arranged above and below the installation frame (5); a positioning frame (12) is slidably arranged on the installation frame (5); the positioning frame (12) can be fixed at any position within a sliding range; the vibration motor (11) is fixedly arranged on the positioning frame (12); and a protective cover (13) is arranged on the vibration motor (11) arranged below the installation frame (5).

5. A starch slurry separation and dehydration system according to claim 3, characterized in that: The filter screen is provided with two layers, namely a fixed filter screen (7) and a movable filter screen (8); the fixed filter screen (7) is fixedly provided on the installation frame (5); the movable filter screen (8) is provided above the fixed filter screen (7) and in contact with each other; the movable filter screen (8) is slidably provided along the length direction of the installation frame (5).

6. A starch slurry separation and dehydration system according to claim 1, characterized in that: The driving mechanism (17) comprises a swing arm (18), a transmission wheel (19) and a driving motor (20); one end of the swing arm (18) is rotatably connected to the screen assembly (4), and the other end is rotatably connected to the eccentric shaft of the transmission wheel (19); a belt is used to drive the rotating shaft of the transmission wheel (19) and the output shaft of the driving motor (20).

7. A starch slurry separation and dehydration system according to claim 1, characterized in that: An isolation cover (28) is provided above the slurry storage tank (2), and the screen assembly (4) is located inside the isolation cover (28).

8. A starch slurry separation and dehydration system according to claim 2, characterized in that: The slurry delivery port (26) is in the shape of an elongated strip and is located directly above the higher end of the screen assembly (4).

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