Spray drying system for soybean milk powder production

Abstract

The invention belongs to the technical field of food processing, and provides a spray drying system for soybean milk powder production, comprising: a feeding module for conveying soybean milk to a spray drying tower; the spraying module is used for atomizing the soybean milk into fine liquid drops; the drying module comprises a drying tower, and a heat exchange system is arranged in the drying tower and used for conducting hot air drying on the atomized soybean milk liquid drops; the separation module is used for separating the dried soybean milk powder from the hot air; the collecting module is used for collecting the dried soybean milk powder; the control system is used for controlling key parameters of the whole spray drying process, and the key parameters comprise temperature, humidity and pressure; by means of the integrated spray drying system, accurate control over key parameters in the soybean milk powder production process is achieved, the nutritional ingredients and flavor of soybean milk powder can be guaranteed by accurately controlling the temperature, humidity and pressure, and the efficiency and quality of products are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of food processing, in particular to a spray drying system for producing soybean milk powder. Background Art

[0002] With the improvement of health awareness, more and more consumers tend to choose natural, additive-free foods. As a healthy food, the market demand for soy milk powder is growing. In the production process of soy milk powder, the concentrated soy milk needs to be spray-dried by a spray dryer. The spray drying process can quickly remove a large amount of water in the soy milk and turn the soy milk into powder.

[0003] When spray drying soy milk, the lack of a precise control system makes it difficult to maintain constant key parameters such as temperature, humidity and pressure during the drying process, which affects the quality of the final product and limits production efficiency.

[0004] Therefore, those skilled in the art have proposed a spray drying system for producing soybean milk powder to solve the problems raised in the background art. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a spray drying system for producing soy milk powder, so as to solve the problem in the prior art that when the soy milk is treated by the spray drying process, due to the lack of an accurate control system, key parameters such as temperature, humidity and pressure in the drying process are difficult to maintain constant, thereby affecting the quality of the final product and limiting the production efficiency.

[0006] A spray drying system for producing soybean milk powder, comprising:

[0007] A feeding module, used for conveying soybean milk to a spray drying tower;

[0008] A spray module, used to atomize the soy milk into fine droplets;

[0009] A drying module, comprising a drying tower, wherein a heat exchange system is provided in the drying tower for performing hot air drying on the atomized soybean milk droplets;

[0010] A separation module is used to separate the dried soy milk powder and hot air;

[0011] A collecting module, used for collecting the dried soy milk powder;

[0012] The control system is used to control the key parameters of the entire spray drying process, including temperature, humidity and pressure.

[0013] Preferably, the feeding module comprises a storage tank and a delivery pump, the storage tank is used to store the soybean milk to be dried, and the delivery pump is used to deliver the soybean milk from the storage tank to the spray module;

[0014] The spray module includes a nozzle and an atomizer, wherein the nozzle is used to receive the soybean milk from the delivery pump and deliver it to the atomizer, and the atomizer is used to atomize the soybean milk into fine droplets;

[0015] The drying tower is a cylindrical structure, the top of the drying tower is provided with an atomized liquid droplet inlet, and the bottom of the drying tower is provided with a dry soybean milk powder outlet;

[0016] The separation module includes a cyclone separator and a bag filter, wherein the cyclone separator is used to preliminarily separate the soy milk powder and the hot air, and the bag filter is used to further filter and collect the soy milk powder;

[0017] The collecting module comprises a powder collecting tank and a discharging valve, wherein the powder collecting tank is used to store the dried soy milk powder, and the discharging valve is used to control the discharging of the soy milk powder;

[0018] The control system includes a central processing unit, sensors, a central processing unit and a user interface. The central processing unit is used to process sensor data and control the drying process. Several of the sensors are used to monitor the temperature, humidity and pressure in the drying tower. The user interface is used to display real-time data of the drying process and receive user operation instructions.

[0019] Preferably, the spray module further comprises an atomizing disk, which can evenly atomize the soybean milk into fine droplets, and the rotation speed of the atomizing disk is n revolutions per minute, and n satisfies the formula Wherein d is the diameter of the atomizer disk, in millimeters. The atomizer disk is driven by a motor, the power of the motor is P watts, and the relationship between P, n and d satisfies the formula P=k×n×d, where k is the motor efficiency coefficient.

[0020] Preferably, the heat exchange system includes a hot air generator and a first heat exchanger, the hot air generator is used to generate hot air with a temperature of T degrees Celsius, where T satisfies the formula T=150+10×C, where C is a parameter value set by the control system, the hot air generator includes a combustion chamber and a fan, the combustion chamber is used to burn fuel to generate heat, and the fan is used to transfer heat to the drying tower through the first heat exchanger.

[0021] Preferably, the separation efficiency of the cyclone separator is not less than η%, where η satisfies the formula η=95+0.5×P, where P is the working pressure of the cyclone separator, in Pascals, the diameter of the cyclone separator is D, in millimeters, and the relationship between D and P satisfies the formula

[0022] Preferably, the sensor includes a temperature sensor, a humidity sensor, a pressure sensor and a central processing unit, which are used to monitor and adjust the temperature, humidity and pressure during the drying process in real time, wherein the temperature adjustment formula is T adj =T set -k×(T meas -T set ), where T adj is the adjusted temperature, T set is the set temperature, T meas is the measured temperature, k is the adjustment coefficient, and the adjustment coefficient is dynamically adjusted according to the actual temperature change in the drying tower to satisfy the formula

[0023] Preferably, the collection module includes a vibrating screen for screening out soybean milk powder particles that do not meet the size requirements, the vibration frequency of the vibrating screen is f Hz, and f satisfies the formula f=2×n, where n is the number of vibrations of the vibrating screen, the amplitude of the vibrating screen is A mm, and the relationship between A and f satisfies the formula

[0024] Preferably, the inner wall of the drying tower is coated with an anti-sticking material, the thermal conductivity of the anti-sticking material is λ watt / (meter·Kelvin), and λ satisfies the formula λ≥0.5, the anti-sticking material is a ceramic coating, the thickness of the anti-sticking material is t millimeters, and the relationship between t and λ satisfies the formula

[0025] Preferably, the control system also includes an energy recovery module for recovering heat energy during the drying process, and the energy recovery efficiency is not less than ∈%, where ∈ satisfies the formula ∈=80+5×R, and R is the operating parameter of the energy recovery module. The energy recovery module includes a second heat exchanger and a heat pump, the second heat exchanger is used to recover heat from the hot air discharged from the drying tower, and the heat pump is used to raise the recovered heat to a higher temperature.

[0026] Preferably, the spray module further includes a flow control valve for controlling the flow of soybean milk. The flow control formula is Q=K×ΔP, where Q is the flow rate, ΔP is the pressure difference, and K is the flow coefficient. The flow control valve is a proportional valve, and the opening of the flow control valve is proportional to ΔP, satisfying the formula Where ΔP max is the maximum pressure difference.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention realizes precise control of key parameters in the soybean milk powder production process through an integrated spray drying system. By precisely controlling temperature, humidity and pressure, the nutritional content and flavor of the soybean milk powder can be ensured, and the efficiency and quality of the product can be improved.

[0029] 2. The present invention realizes uniform atomization and precise flow control of soybean milk through a high-speed rotating atomizing disk and a precise flow control valve, can quickly and efficiently perform spray drying and granulation of soybean milk, and improves drying efficiency.

[0030] 3. The present invention can accurately control the hot air temperature according to the parameter value set by the control system by optimizing the heat exchange system, thereby improving the heat exchange efficiency, shortening the heating time of the material and increasing the evaporation efficiency, and obtaining a better color and flavor of the soy milk powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is an overall schematic diagram of a spray drying system for producing soy milk powder. DETAILED DESCRIPTION

[0032] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] Embodiment 1

[0034] As attached Figure 1 As shown, the present invention provides a spray drying system for producing soybean milk powder, comprising:

[0035] A feeding module is used to convey the soybean milk to the spray drying tower, ensuring that the soybean milk can be conveyed to the spray drying tower stably and continuously;

[0036] A spray module is used to atomize the soy milk into fine droplets to increase its surface area, thereby improving heat exchange efficiency and accelerating the drying process;

[0037] The drying module includes a drying tower, in which a heat exchange system is provided for hot air drying the atomized soybean milk droplets, with heat exchange efficiency and material residence time as key factors to ensure that the soybean milk droplets can be evenly dried within an appropriate time;

[0038] A separation module, used for separating the dried soy milk powder and the hot air to collect the dried soy milk powder;

[0039] A collecting module, used for collecting the dried soy milk powder;

[0040] The control system is used to control the key parameters of the entire spray drying process, including temperature, humidity and pressure. By accurately controlling the key parameters in the soy milk powder production process, the drying efficiency is improved, the energy consumption is reduced, and the stability and consistency of product quality are ensured.

[0041] Embodiment 2

[0042] This embodiment is basically the same as the previous embodiment, except that the feeding module includes a storage tank and a delivery pump, the storage tank is used to store the soybean milk to be dried, and the delivery pump is used to deliver the soybean milk from the storage tank to the spray module. The storage tank is used to maintain the freshness of the soybean milk and avoid contamination, and the delivery pump is used to ensure that the soybean milk can be smoothly and efficiently delivered to the spray module. The continuous and stable feeding method reduces the lag time in the system, improves the overall production efficiency, and ensures the consistency of product quality.

[0043] The spray module includes a nozzle and an atomizer. The nozzle is used to receive the soybean milk from the delivery pump and deliver it to the atomizer. The atomizer is used to atomize the soybean milk into fine droplets. The nozzle ensures the uniform distribution and continuous flow of the soybean milk. The atomizer can atomize the soybean milk into uniform fine droplets. This uniform atomization helps to increase the contact area between the hot air and the soybean milk droplets, thereby improving the drying efficiency and the quality of the final product.

[0044] The drying tower is a cylindrical structure, which optimizes the space utilization and hot air flow path, and improves the heat exchange efficiency. The top of the drying tower is provided with an atomized droplet inlet, and the bottom of the drying tower is provided with a dry soybean milk powder outlet, which ensures the continuity and directionality of the material flow, reduces the residence time of the material in the tower, and improves the drying efficiency;

[0045] The separation module includes a cyclone separator and a bag filter. The cyclone separator is used to initially separate the soy milk powder and hot air, and the bag filter is used to further filter and collect the soy milk powder. The cyclone separator uses the principle of centrifugal force to initially separate the soy milk powder and hot air to ensure that most of the soy milk powder can be effectively collected. The bag filter further filters and collects the soy milk powder to ensure product quality and production efficiency.

[0046] The collection module includes a powder collection tank and a discharge valve. The powder collection tank is used to store the dried soy milk powder, and the discharge valve is used to control the discharge of the soy milk powder. The powder collection tank can reduce the loss and pollution during the storage and discharge process, and the discharge valve ensures that the soy milk powder can be accurately controlled to be discharged according to production needs, reducing waste.

[0047] The control system includes a central processing unit, sensors, a central processing unit and a user interface. The central processing unit is used to process sensor data and control the drying process. Several sensors are used to monitor the temperature, humidity and pressure in the drying tower. The user interface is used to display real-time data of the drying process and receive user operation instructions. The control system is the brain of the entire spray drying system and is used to control the key parameters of the entire spray drying process, including temperature, humidity and pressure. The central processing unit adjusts the drying process in real time according to the data collected by the sensors to ensure accurate control of key parameters. The sensors are used to monitor the temperature, humidity and pressure in the drying tower, while the user interface is used to display real-time data of the drying process and receive user operation instructions, so that the operator can make adjustments according to actual conditions.

[0048] Specifically, the spray module also includes an atomizing disk, which can evenly atomize the soybean milk into fine droplets. The rotation speed of the atomizing disk is n revolutions per minute, and n satisfies the formula Where d is the diameter of the atomizer disk, in millimeters. The atomizer disk is driven by a motor, the power of the motor is P watts, and the relationship between P, n and d satisfies the formula P=k×n×d, where k is the motor efficiency coefficient.

[0049] Furthermore, the heat exchange system includes a hot air generator and a first heat exchanger. The hot air generator is used to generate hot air with a temperature of T degrees Celsius, where T satisfies the formula T=150+10×C, where C is a parameter value set by the control system. The hot air generator includes a combustion chamber and a fan. The combustion chamber is used to burn fuel to generate heat, and the fan is used to transfer the heat to the drying tower through the first heat exchanger. The precise matching of the rotation speed of the atomizing disk and the motor power ensures the stability and consistency of the atomization effect and reduces product quality problems caused by uneven atomization.

[0050] Furthermore, the separation efficiency of the cyclone separator is not less than η%, where η satisfies the formula η=95+0.5×P, where P is the working pressure of the cyclone separator, in Pascals, the diameter of the cyclone separator is D, in millimeters, and the relationship between D and P satisfies the formula

[0051] Embodiment 3

[0052] This embodiment is basically the same as the previous embodiment, except that the sensor includes a temperature sensor, a humidity sensor, a pressure sensor and a central processor, which are used to monitor and adjust the temperature, humidity and pressure in the drying process in real time, wherein the temperature adjustment formula is T adj =T set -k×(T meas -T set), the temperature adjustment formula enables the system to make fine temperature adjustments by adjusting the coefficient k according to the deviation between the actual temperature and the set temperature to maintain the uniformity of the drying process, where T adj is the adjusted temperature, T set is the set temperature, T meas is the measured temperature, k is the adjustment coefficient, and the adjustment coefficient is dynamically adjusted according to the actual temperature change in the drying tower to meet the formula

[0053] Specifically, the collection module includes a vibrating screen for screening out soybean milk powder particles that do not meet the size requirements. The vibration frequency of the vibrating screen is f Hz, and f satisfies the formula f=2×n, where n is the number of vibrations of the vibrating screen, the amplitude of the vibrating screen is A mm, and the relationship between A and f satisfies the formula The precise control of vibration frequency f and amplitude A enables the vibrating screen to efficiently separate oversized or undersized particles, thus improving product quality.

[0054] Furthermore, the inner wall of the drying tower is coated with an anti-sticking material, the thermal conductivity of the anti-sticking material is λW / (m·Kelvin), and λ satisfies the formula λ≥0.5, the anti-sticking material is a ceramic coating, the thickness of the anti-sticking material is t mm, and the relationship between t and λ satisfies the formula It can transfer heat quickly and prevent materials from adhering to the tower wall.

[0055] Furthermore, the control system also includes an energy recovery module for recovering heat energy during the drying process, and the energy recovery efficiency is not less than ∈%, where ∈ satisfies the formula ∈=80+5×R, and R is the operating parameter of the energy recovery module. The energy recovery module includes a second heat exchanger and a heat pump. The second heat exchanger is used to recover heat from the hot air discharged from the drying tower, and the heat pump is used to raise the recovered heat to a higher temperature. The coordinated use of the second heat exchanger and the heat pump enables the system to recover heat from the discharged hot air and raise it to a higher temperature for subsequent drying processes.

[0056] Furthermore, the spray module also includes a flow control valve for controlling the flow of soybean milk. The flow control formula is Q=K×ΔP, where Q is the flow rate, ΔP is the pressure difference, K is the flow coefficient, and the flow control valve is a proportional valve. The opening of the flow control valve is proportional to ΔP, satisfying the formula Where ΔP max The flow control valve is used to accurately control the flow of soy milk to ensure the uniformity and stability of the atomization process.

[0057] Furthermore, the control system also includes a data recording module for recording various parameters during the drying process. The data recording frequency is F times / second, and F satisfies the formula Where t is the recording interval in seconds. The data recording module includes a data storage device and a data processor. The data storage device is used to store the recorded data, and the data processor is used to process and analyze the stored data. The coordinated use of the data storage device and the data processor enables the system to store, process and analyze a large amount of production data. The data recording and analysis capabilities provide a basis for the optimization of the production process and help improve production efficiency and product quality.

[0058] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0059] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0063] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0064] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spray drying system for producing soybean milk powder, characterized in that: include, A feeding module, used for conveying soybean milk to a spray drying tower; A spray module, used to atomize the soy milk into fine droplets; A drying module, comprising a drying tower, wherein a heat exchange system is provided in the drying tower for performing hot air drying on the atomized soybean milk droplets; A separation module is used to separate the dried soy milk powder and hot air; A collecting module, used for collecting the dried soy milk powder; The control system is used to control the key parameters of the entire spray drying process, including temperature, humidity and pressure.

2. A spray drying system for producing soybean milk powder as claimed in claim 1, characterized in that: The feeding module comprises a storage tank and a delivery pump, wherein the storage tank is used to store the soybean milk to be dried, and the delivery pump is used to deliver the soybean milk from the storage tank to the spray module; The spray module includes a nozzle and an atomizer, wherein the nozzle is used to receive the soybean milk from the delivery pump and deliver it to the atomizer, and the atomizer is used to atomize the soybean milk into fine droplets; The drying tower is a cylindrical structure, the top of the drying tower is provided with an atomized liquid droplet inlet, and the bottom of the drying tower is provided with a dry soybean milk powder outlet; The separation module includes a cyclone separator and a bag filter, wherein the cyclone separator is used to preliminarily separate the soy milk powder and the hot air, and the bag filter is used to further filter and collect the soy milk powder; The collecting module comprises a powder collecting tank and a discharging valve, wherein the powder collecting tank is used to store the dried soy milk powder, and the discharging valve is used to control the discharging of the soy milk powder; The control system includes a central processing unit, sensors, a central processing unit and a user interface. The central processing unit is used to process sensor data and control the drying process. Several of the sensors are used to monitor the temperature, humidity and pressure in the drying tower. The user interface is used to display real-time data of the drying process and receive user operation instructions.

3. A spray drying system for producing soybean milk powder as claimed in claim 2, characterized in that: The spray module also includes an atomizing disk, which can evenly atomize the soybean milk into fine droplets. The rotation speed of the atomizing disk is n revolutions per minute, and n satisfies the formula Wherein d is the diameter of the atomizer disk, in millimeters. The atomizer disk is driven by a motor, the power of the motor is P watts, and the relationship between P, n and d satisfies the formula P=k×n×d, where k is the motor efficiency coefficient.

4. A spray drying system for producing soybean milk powder as claimed in claim 3, characterized in that: The heat exchange system includes a hot air generator and a first heat exchanger. The hot air generator is used to generate hot air with a temperature of T degrees Celsius, where T satisfies the formula T=150+10×C, where C is a parameter value set by the control system. The hot air generator includes a combustion chamber and a fan. The combustion chamber is used to burn fuel to generate heat, and the fan is used to transfer the heat to the drying tower through the first heat exchanger.

5. A spray drying system for producing soybean milk powder as claimed in claim 4, characterized in that: The separation efficiency of the cyclone separator is not less than η%, where η satisfies the formula η=95+0.5×P, where P is the working pressure of the cyclone separator, in Pascals, the diameter of the cyclone separator is D, in millimeters, and the relationship between D and P satisfies the formula 6. A spray drying system for producing soybean milk powder as claimed in claim 5, characterized in that: The sensors include temperature sensors, humidity sensors, and pressure sensors, which are used to monitor and adjust the temperature, humidity, and pressure during the drying process in real time. The temperature adjustment formula is T adj =T set -k×(T meas -T set ), where T adj is the adjusted temperature, T set is the set temperature, T meas is the measured temperature, k is the adjustment coefficient, and the adjustment coefficient is dynamically adjusted according to the actual temperature change in the drying tower to satisfy the formula 7. A spray drying system for producing soybean milk powder as claimed in claim 6, characterized in that: The collection module includes a vibrating screen for screening out soybean milk powder particles that do not meet the size requirements. The vibration frequency of the vibrating screen is f Hz, and f satisfies the formula f=2×n, where n is the number of vibrations of the vibrating screen, the amplitude of the vibrating screen is A mm, and the relationship between A and f satisfies the formula 8. A spray drying system for producing soybean milk powder as claimed in claim 7, characterized in that: The inner wall of the drying tower is coated with an anti-sticking material, the thermal conductivity of the anti-sticking material is λ watt / (m·Kelvin), and λ satisfies the formula λ≥0.5, the anti-sticking material is a ceramic coating, the thickness of the anti-sticking material is t millimeters, and the relationship between t and λ satisfies the formula 9. A spray drying system for producing soybean milk powder as claimed in claim 8, characterized in that: The control system also includes an energy recovery module for recovering heat energy during the drying process, and the energy recovery efficiency is not less than ∈%, where ∈ satisfies the formula ∈=80+5×R, and R is the operating parameter of the energy recovery module. The energy recovery module includes a second heat exchanger and a heat pump. The second heat exchanger is used to recover heat from the hot air discharged from the drying tower, and the heat pump is used to raise the recovered heat to a higher temperature.

10. A spray drying system for producing soybean milk powder as claimed in claim 9, characterized in that: The spray module also includes a flow control valve for controlling the flow of soybean milk. The flow control formula is Q=K×ΔP, where Q is the flow rate, ΔP is the pressure difference, and K is the flow coefficient. The flow control valve is a proportional valve, and the opening of the flow control valve is proportional to ΔP, satisfying the formula Where ΔP max is the maximum pressure difference.

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