A method for controlling moisture content of flour by-products

Abstract

The invention belongs to the technical field of flour production, and particularly relates to a moisture control system and a moisture control method for flour by-products, comprising a humidifying hopper added at the end of a by-product production line, a plurality of atomizing nozzles evenly arranged in the humidifying hopper, the atomizing nozzles connected to a water supply system through a connecting pipe, a solenoid valve provided on the connecting pipe, the humidifying hopper connected to an inspection screen and an intermediate weighing scale in sequence, the by-products enter the humidifying hopper, the atomizing nozzles spray and humidify the by-products in the humidifying hopper through the water supply system, the humidified by-products enter the inspection sieve, the inspection sieve sieves the by-products, qualified flour passes through the sieve holes and passes through the intermediate weighing scale, the intermediate weighing scale is used for online flow measurement, and then the by-products are manually sampled, the sampled by-products are manually measured for humidity through a testing device, and the water supply of the water supply system is controlled according to the humidity measurement value, so that the humidity of the by-products reaches a target value.

Description

Technical Field

[0001] The invention belongs to the technical field of flour production, and in particular relates to a method for controlling moisture of flour by-products. Background Art

[0002] At present, most wheat flour milling processes are long flour milling routes, characterized by long routes and many equipments. From the time the raw materials enter the first equipment to the time the finished products leave the machine, they generally need to go through the process of 10 cores, 7 skins, 2 residues and 2 tails of grinding, sieving and cleaning, during which the moisture loss is relatively large; that is, the overall moisture content of the wheat entering the machine is 15.5%, but the comprehensive moisture content of all finished products is between 12-14%, and the moisture content is also highly correlated with the season. Generally, the loss is greater in summer, with a moisture value of 12% or even lower than 12%. According to the new national flour standards, the moisture content of each grade of flour is uniformly stipulated to be equal to or not greater than 14.5%. We know that the higher the moisture content, the heavier the quality of the finished product, which can bring higher profits to the production enterprise, that is, on the premise of ensuring compliance with the standards, the closer the moisture content is to the national standard, the higher the enterprise profit. At present, there is no moisture control system in flour production, resulting in the moisture content of many finished products being significantly lower than the national standard. Summary of the invention

[0003] The present invention provides a method for controlling moisture of flour by-products, which can solve the problems pointed out in the background technology.

[0004] A method for controlling moisture content of flour by-products, comprising a humidifying hopper added at the end of a by-product production line, a plurality of atomizing nozzles evenly arranged in the humidifying hopper, the atomizing nozzles connected to a water supply system via a connecting pipe, a solenoid valve provided on the connecting pipe, the humidifying hopper connected to an inspection screen and an intermediate weighing scale in sequence, the by-products enter the humidifying hopper, the atomizing nozzles spray and humidify the by-products in the humidifying hopper via a water supply system, the humidified by-products enter the inspection screen, the inspection screen sieves the by-products, qualified flour passes through the sieve holes and passes through the intermediate weighing scale, the intermediate weighing scale is used for online flow The humidity of the sampled by-products is measured manually, and then the by-products are sampled manually through testing equipment. According to the humidity measurement value, the water supply of the water supply system is controlled to make the humidity of the by-products reach the target value. The humidifying bucket is connected to the by-product pipeline. A pneumatic paddle is added to the by-product pipeline. The pneumatic paddle is used for reversing so that the by-products in the by-product pipeline enter the humidifying bucket. Several air hammers are arranged on the outer wall of the humidifying bucket. A flow meter is arranged at the solenoid valve. The water supply system is a micro-mist humidifier. A pneumatic blocking switch is arranged in the humidifying bucket.

[0005] Beneficial effects: The present invention provides a method for controlling the moisture content of flour by-products, which can control the moisture content of flour by-products to make them closer to the upper limit of national standards, and can increase the profits of enterprises to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a schematic diagram of the system of the present invention,

[0007] Figure 2 It is a structural schematic diagram of the humidifying bucket of the present invention,

[0008] Description of reference numerals:

[0009] Numbers in the figure: humidifying bucket 1; atomizing nozzle 2; connecting pipe 3; water supply system 4; solenoid valve 5; inspection screen 6; intermediate weighing scale 7; on the by-product pipeline 8; pneumatic paddle 9; flow meter 10; air hammer 11; brake dragon air shut-off device 12; three-way 13; high-pressure fan 14; Roots blower positive pressure air shut-off device 15; rotary blocking switch 16. DETAILED DESCRIPTION

[0010] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0011] Example 1: Figure 1-2 As shown, a method for controlling the moisture content of flour by-products includes a humidifying hopper 1 added at the end of the by-product production line. The by-products include ordinary flour, bran and inferior flour. A plurality of atomizing nozzles 2 are evenly arranged in the humidifying hopper 1. The atomizing nozzle 2 is connected to a water supply system 4 through a connecting pipe 3. The water supply system 4 is a micro-mist humidifier, and its main function is to provide high-pressure water mist, which can provide a pressure of 2Mpa-10Mpa. A solenoid valve 5 is provided on the connecting pipe 3. The humidifying hopper 1 is connected to an inspection screen 6 and an intermediate metering scale 7 in sequence.

[0012] Specifically, the humidifying bucket 1 is connected to the by-product pipeline 8, and a pneumatic paddle 9 is added to the by-product pipeline 8. The pneumatic paddle 9 is used to change the direction so that the by-product in the by-product pipeline 8 enters the humidifying bucket 1. By setting the pneumatic paddle 9, automatic reversing can be achieved. When humidification treatment is required, it is switched to the direction of the humidifying bucket 1. When humidification is not required, it is in the original pipeline direction.

[0013] A plurality of air hammers 11 are arranged on the outer wall of the humidifying bucket 1 . The air hammers 11 are connected to the control system and work according to the set frequency. The air hammers 11 are arranged in different directions of the humidifying bucket 1 to realize the self-cleaning function of the inner wall of the humidifying bucket 1 .

[0014] A flow meter 10 is provided at the solenoid valve 5. The flow meter 10 is a mass volume flow meter. The amount of water added is obtained through the flow meter 5. At the same time, the flow meter 5 is provided with an upper limit value and a lower limit value of water added. If the value is higher or lower than the limit value, an alarm will be triggered, and the solenoid valve 5 will be disconnected immediately to cut off the water addition, and the water addition will be restarted after the employee has verified and processed it.

[0015] The humidifying bucket 1 is provided with a rotary blocking switch 16, which is specifically arranged at the outlet of the humidifying bucket 1. When blocking is detected, the rotary blocking switch 16 uploads a signal to the control system, activates the alarm function and the pneumatic bucket 9 automatically turns to the original production direction to avoid shutdown of the production line.

[0016] The control method of the present invention is as follows: the pneumatic bucket 9 is controlled to be reversed, and the by-product is automatically cut into the humidifying bucket 1. The water supply system 4 is started by the control system. The control system can be a control system based on PLC. The atomizing nozzle 2 sprays and humidifies the by-product passing through the humidifying bucket 1, so that the by-product reaches the target moisture of the initial part. The lower end of the humidifying bucket 1 is connected to the brake dragon air shut-off device unit 12, and the brake dragon air shut-off device unit 12 is connected to the high-pressure fan 14 to realize negative pressure lifting, and the humidified by-product is transported back to the by-product pipeline 8. A connecting tee 13 is set on the by-product pipeline 8 at the connection, and the by-product passes through the inspection screen 6 Inside, the inspection sieve 6 sifts the by-products, and the qualified flour passes through the sieve holes and passes through the intermediate metering scale 7. The intermediate metering scale 7 is used for online flow measurement, that is, it can measure the hourly flow of the material to be humidified in real time, providing a calculation basis for a stable water addition rate. Subsequently, the by-products are manually sampled, and the humidity of the sampled by-products is measured manually through near-infrared testing equipment. According to the humidity measurement value, the water supply of the water supply system 4 is controlled, that is, the pressure switch of the micro-mist humidifier is adjusted to adjust the water output so that the humidity of the by-product reaches the target value, and finally the by-product is sent to the packaging bin by the Roots blower positive pressure air shut-off device 15 for packaging and storage.

[0017] The specific way to adjust the amount of water is: the flow rate of the material is measured by the intermediate metering scale 7, and then the original moisture content of the raw material is manually measured. By comparing it with the target moisture content, the theoretical amount of water added can be calculated, and then the pressure of the micro-mist humidifier is adjusted to achieve the theoretical amount of water added. The data on the amount of water added can be obtained at any time through the flow meter 10.

[0018] Formula: Theoretical water addition amount (KG / H) = flow rate measured by intermediate scale (KG / H) * ((100-original moisture) / (100-target moisture)-1).

[0019] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A method for controlling moisture content of flour by-products, characterized in that: The invention comprises a humidifying hopper (1) added at the end of a by-product production line, wherein a plurality of atomizing nozzles (2) are evenly arranged in the humidifying hopper (1), wherein the atomizing nozzles (2) are connected to a water supply system (4) via a connecting pipe (3), wherein a solenoid valve (5) is provided on the connecting pipe (3), wherein the humidifying hopper (1) is connected to an inspection screen (6) and an intermediate weighing scale (7) in sequence, wherein the by-product enters the humidifying hopper (1), wherein the atomizing nozzles (2) spray and humidify the by-product in the humidifying hopper (1) via the water supply system (4), wherein the humidified by-product enters the inspection screen (6), wherein the inspection screen (6) sieves the by-product, wherein qualified flour passes through the sieve holes and passes through the intermediate weighing scale (7), wherein the intermediate weighing scale (7) is used for measuring the online flow rate , then the by-product is sampled manually, and the humidity of the sampled by-product is measured manually through a testing device. According to the humidity measurement value, the water supply of the water supply system (4) is controlled so that the humidity of the by-product reaches the target value. The humidifying bucket (1) is connected to the by-product pipeline (8), and a pneumatic paddle (9) is added to the by-product pipeline (8). The pneumatic paddle (9) is used to change the direction so that the by-product in the by-product pipeline (8) enters the humidifying bucket (1); a plurality of air hammers (11) are arranged on the outer wall of the humidifying bucket (1); a flow meter (10) is arranged at the solenoid valve (5); the water supply system (4) is a micro-mist humidifier; a pneumatic blocking switch (16) is arranged in the humidifying bucket (1); The pneumatic bucket (9) is controlled to change direction, and the by-product is automatically cut into the humidification bucket (1). The water supply system (4) is started by the control system. The control system is a PLC-based control system. The atomizing nozzle (2) sprays and humidifies the by-product passing through the humidification bucket (1) so that the by-product reaches the target moisture content at the beginning. The lower end of the humidification bucket (1) is connected to a shaklon air shut-off device unit (12). The shaklon air shut-off device unit (12) is connected to a high-pressure fan (14) to realize negative pressure lifting. The humidified by-product is transported back to the by-product pipeline (8). A connecting tee (13) is provided on the by-product pipeline (8) at the connection. The by-product passes through an inspection screen ( 6), the inspection sieve (6) sieves the by-products, and the qualified flour passes through the sieve holes and passes through the intermediate weighing scale (7). The intermediate weighing scale (7) is used for online flow measurement, that is, it can measure the hourly flow of the material to be humidified in real time, providing a calculation basis for a stable water addition rate. Subsequently, the by-products are manually sampled, and the humidity of the sampled by-products is measured manually through near-infrared analysis equipment. According to the humidity measurement value, the water supply of the water supply system (4) is controlled, that is, the pressure switch of the micro-mist humidifier is adjusted to adjust the water output so that the humidity of the by-products reaches the target value. Finally, the by-products are sent to the packaging bin by the Roots blower positive pressure air shut-off device (15) for packaging and storage; The specific method of adjusting the water volume is as follows: the flow rate of the material is measured by an intermediate weighing scale (7), and then the original moisture content of the raw material is measured manually, and compared with the target moisture content to calculate the theoretical water addition amount, and then the pressure of the micro-mist humidifier is adjusted to reach the theoretical water addition amount. The water addition amount data is obtained at any time through the flow meter (10); Formula: Theoretical water addition amount (KG / H) = flow rate measured by intermediate scale (KG / H) * ((100-original moisture) / (100-target moisture)-1).

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