Heat exchange device for fluidization processing of non-dairy creamer and control method of heat exchange device

Abstract

The invention relates to a heat exchange device for non-dairy creamer fluidization processing and a control method thereof, and belongs to the technical field of non-dairy creamer processing.The heat exchange device comprises a control module, a fluidized bed and a plurality of heat exchange devices, and the control module is electrically connected with the fluidized bed and the heat exchange devices and controls the cooling power of the heat exchange devices; any heat exchange device comprises a liquid pump and a circulating pipeline, the liquid pump drives a cooling medium to flow in the circulating pipeline, one part of the circulating pipeline is embedded into the fluidized bed, and the part, embedded into the fluidized bed, of the circulating pipeline is a cooling section; the cooling sections of the heat exchange devices are sequentially arranged in the material flowing direction, and the cooling power of the heat exchange devices in the material flowing direction is sequentially decreased.

Description

Technical Field

[0001] This invention belongs to the field of non-dairy creamer processing technology, specifically relating to a heat exchange device and control method for fluidized bed non-dairy creamer processing. Background Technology

[0002] Non-dairy creamer is a powdered fat substitute widely used in the food, beverage, and dairy industries.

[0003] In its fluidized bed processing, spray drying is required. This involves concentrating liquid materials to a suitable density, atomizing them into small droplets, and exchanging heat with a hot gas stream at a certain flow rate, causing the moisture to evaporate rapidly and the material to dry into powder or granules. After spray drying, the vegetable oil powder is cooled in the fluidized bed equipment. However, the cooled vegetable oil powder can only be dissolved in warm or hot water, not in room temperature or ice water. To address this, Chinese patent CN214512761U discloses a fluidized bed equipment and a spray drying system. The fluidized bed equipment includes a fluidized bed, a cooling circulation component, and a trace element spraying component. The cooling circulation component is located on the outside of the fluidized bed equipment and is used to cool the fluidized bed. The trace element spraying component is connected to the fluidized bed and is used to spray trace elements into the interior of the fluidized bed. The spray drying system uses the aforementioned fluidization equipment, and the trace element spraying component sprays trace elements into the vegetable oil powder, so that the vegetable oil powder after fluidization and cooling can be directly dissolved in room temperature water or ice water, making the vegetable oil powder easier to handle in subsequent use.

[0004] However, in the above scheme, the cooling circulation component adopts a simple external heat exchange structure with a single circulation pipeline, which has technical defects such as low heat exchange efficiency and insufficient cooling effect during fluidized processing. Therefore, a heat exchange device and its control method for the fluidized processing of vegetable oil with high heat exchange efficiency are needed. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this invention provides a heat exchange device and its control method for the final fluidized bed processing of vegetable resin, which features high heat exchange efficiency.

[0006] The objective of this invention can be achieved through the following technical solutions: A heat exchange device for fluidized bed processing of plant resin powder includes a control module, a fluidized bed and several heat exchange devices. The control module is electrically connected to the fluidized bed and each heat exchange device and controls the cooling power of each heat exchange device. Any of the heat exchange devices includes a liquid pump and a circulation pipeline, wherein the liquid pump drives a cooling medium to flow in the circulation pipeline, a portion of the circulation pipeline is embedded inside the fluidized bed, and the portion of the circulation pipeline embedded inside the fluidized bed is a cooling section; The cooling sections of several heat exchange devices are arranged sequentially along the material flow direction, and the cooling power of several heat exchange devices decreases sequentially along the material flow direction.

[0007] As a preferred technical solution of the present invention, it also includes a sensing module, which is used to collect the temperature parameters of the fluidized bed outlet material in real time and feed the data back to the control module. The control module determines whether the outlet material temperature exceeds a threshold and, if it exceeds the threshold, increases the cooling power of several heat exchange devices as a whole.

[0008] As a preferred embodiment of the present invention, the sensing module is used to collect the material temperature parameter Wc at the fluidized bed outlet in real time and feed Wc back to the control module. The control module corrects the cooling power of several heat exchange devices to A1 times, where A1=lg(x)+1, x=Wc / Wc0, and Wc0 is a preset reference temperature threshold; when x≤1, x takes the value of 1.

[0009] As a preferred embodiment of the present invention, the cooling power of the plurality of heat exchange devices is arranged in descending order along the material flow direction in the fluidized bed. Let the power of the heat exchange device numbered n be P, then the power difference between the heat exchange device numbered n and the next heat exchange device along the material flow direction is ΔPn=Pn-P(n+1), and ΔP1>ΔP2>...>ΔPn-1.

[0010] As a preferred embodiment of the present invention, the sensing module collects the thickness of the material in the fluidized bed and uploads it to the control module. The control module determines whether the material thickness is lower than the set upper limit. When the determination result is yes, the control module reduces the power difference between the two adjacent heat exchange devices by increasing the cooling power.

[0011] As a preferred technical solution of the present invention, the sensing module collects the material thickness h in the fluidized bed and uploads it to the control module. The control module corrects the power difference ΔPn between two adjacent heat exchange devices to ΔPn×A2×kn, where A2=h0 / h, h0 is the preset reference thickness, and kn=Px / Pn, x=1, 2, ..., n.

[0012] The beneficial effects of this invention are as follows: (1) By setting up several heat exchange devices, a gradient cooling power distribution along the material flow direction can be formed compared with a single cooling circulation pipeline. Each heat exchange device is responsible for cooling a certain section of the fluidized bed, which improves the cooling efficiency. (2) By directly embedding the heat exchange device inside the fluidized bed, the cooling medium and the material fluidized layer undergo near-field forced convection heat exchange, which further improves the heat exchange efficiency. (3) By enabling the control module to obtain the fluidized bed outlet material temperature parameters, determine whether the outlet material temperature exceeds the threshold, and when it exceeds the threshold, adjust the cooling power of several heat exchange devices as a whole so that the cooling power can match the demand under the current working conditions in real time. (4) By setting the power difference of several heat exchange powers to a gradient distribution that decreases sequentially along the material flow direction, the situation where the first stage cooling power is too strong and the subsequent heat exchange devices cannot fully play their role is avoided. At the same time, the above-mentioned adjustment based on the outlet material temperature avoids the situation where the first stage cooling is insufficient and the heat load is left to the subsequent stages. (5) By enabling the control module to acquire the material thickness parameter h at multiple points in the fluidized bed in real time, the current power difference ΔPn×A2×kn is dynamically corrected, where A2=h0 / h and kn=Px / Pn, so that a relationship is established between the power difference and the material thickness. When the material thickness is high and a more stable cooling process is required, the power gradient curves of several heat exchange devices are made to decrease more linearly. When the material thickness is low and the cooling rate needs to be accelerated, the power gradient slope is increased to strengthen the front-end cooling intensity, thereby achieving precise on-demand allocation of cooling capacity while ensuring fluidization stability. Attached Figure Description

[0013] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a block diagram of the control loop of the present invention. Detailed Implementation

[0015] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0016] Please see Figure 1 A heat exchange device for fluidized bed processing of plant resin powder includes a control module, a fluidized bed and several heat exchange devices. The control module is electrically connected to the fluidized bed and each heat exchange device and controls the cooling power of each heat exchange device. Any heat exchange device includes a liquid pump and a circulation pipeline. The liquid pump drives the cooling medium to flow in the circulation pipeline. A portion of the circulation pipeline is embedded inside the fluidized bed. The portion of the circulation pipeline embedded inside the fluidized bed is the cooling section. The cooling sections of several heat exchange devices are arranged sequentially along the material flow direction. The cooling power of the heat exchange devices along the material flow direction decreases sequentially. For example, if the cooling power of the first-stage heat exchange device is P1, then the cooling power of the second-stage heat exchange device is 0.8P1, the third-stage is 0.7P1, the fourth-stage is 0.65P1, and so on. The number of heat exchange devices is less than or equal to 10. By setting up several heat exchange devices, a gradient cooling power distribution along the material flow direction can be formed compared to a single cooling circulation pipeline. Each heat exchange device is responsible for cooling a certain section of the fluidized bed, which improves cooling efficiency. Meanwhile, by directly embedding the heat exchange device inside the fluidized bed, the cooling medium and the material fluidized layer undergo near-field forced convection heat exchange, which further improves the heat exchange efficiency. It also includes a sensing module, which is used to collect the temperature parameters of the fluidized bed outlet material in real time and feed the data back to the control module. The control module determines whether the outlet material temperature exceeds the threshold and, if it exceeds the threshold, increases the cooling power of several heat exchange devices as a whole. Specifically, the sensing module is used to collect the material temperature parameter Wc at the fluidized bed outlet in real time and feed Wc back to the control module. The control module corrects the cooling power of several heat exchange devices to A1 times, where A1=lg(x)+1, x=Wc / Wc0, and Wc0 is a preset reference temperature threshold; when x≤1, x takes the value of 1. By enabling the control module to acquire the fluidized bed outlet material temperature parameters, it determines whether the outlet material temperature exceeds the threshold. If the temperature exceeds the threshold, the cooling power of several heat exchange devices is increased as a whole, so that the cooling power can be matched with the demand under the current working conditions in real time.

[0017] To ensure that the cooling curves of several heat exchange devices are smooth and continuous decay curves, the cooling power of several heat exchange devices is arranged in a sequentially decreasing manner along the material flow direction in the fluidized bed. Let the power of the heat exchange device numbered n be P. Then the power difference between the heat exchange device numbered n and the next heat exchange device along the material flow direction is ΔPn=Pn-P(n+1), and ΔP1>ΔP2>...>ΔPn-1; By setting the power difference of several heat exchange powers to a gradient distribution that decreases sequentially along the material flow direction, the situation where the first-stage cooling power is too strong and the subsequent heat exchange devices cannot fully play their role is avoided. At the same time, the above-mentioned adjustment based on the outlet material temperature avoids the situation where the first-stage cooling is insufficient and the heat load is left to the subsequent stages. The sensing module collects the thickness of the material in the fluidized bed and uploads it to the control module. The control module determines whether the material thickness is lower than the set upper limit. If the determination result is yes, the control module reduces the power difference between the two adjacent heat exchange devices by increasing the cooling power. In this embodiment, the sensing module includes at least a temperature sensor and a thickness sensor. The thickness sensor monitors the change in fluidized layer thickness in real time through the ranging principle and uploads the data to the control module. Specifically, the sensing module collects the material thickness h in the fluidized bed and uploads it to the control module. The control module corrects the power difference ΔPn between two adjacent heat exchange devices to ΔPn×A2×kn, where A2=h0 / h, h0 is the preset reference thickness, and kn=Px / Pn, x=1, 2, ..., n. At this point, the closer the heat exchange device is to the front end, the more the power difference is reduced, so that when the material is thicker, the power gradient distribution is more gradual, in order to avoid local overcooling at the front end leading to agglomeration. By enabling the control module to acquire the material thickness parameter h at multiple points within the fluidized bed in real time, and dynamically correcting the current power difference ΔPn×A2×kn, where A2=h0 / h and kn=Px / Pn, a relationship is established between the power difference and the material thickness. When the material thickness is high and a more stable cooling process is required, the power gradient curves of several heat exchange devices are made to decrease more linearly. When the material thickness is low and a faster cooling rate is required, the slope of the power gradient is increased to enhance the front-end cooling intensity, thereby achieving precise on-demand allocation of cooling capacity while ensuring fluidization stability.

[0018] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A heat exchange device for fluidized bed processing of plant resin powder, characterized in that: It includes a control module, a fluidized bed, and several heat exchange devices. The control module is electrically connected to the fluidized bed and each heat exchange device and controls the cooling power of each heat exchange device. Any of the heat exchange devices includes a liquid pump and a circulation pipeline, wherein the liquid pump drives a cooling medium to flow in the circulation pipeline, a portion of the circulation pipeline is embedded inside the fluidized bed, and the portion of the circulation pipeline embedded inside the fluidized bed is a cooling section; The cooling sections of several heat exchange devices are arranged sequentially along the material flow direction, and the cooling power of several heat exchange devices decreases sequentially along the material flow direction.

2. The heat exchange device for fluidized bed processing of plant resin powder according to claim 1, characterized in that: It also includes a sensing module, which is used to collect the temperature parameters of the fluidized bed outlet material in real time and feed the data back to the control module. The control module determines whether the outlet material temperature exceeds the threshold and, if it does, increases the cooling power of several heat exchange devices as a whole.

3. The heat exchange device for fluidized bed processing of plant resin powder according to claim 1, characterized in that: The sensing module is used to collect the material temperature parameter Wc at the fluidized bed outlet in real time and feed Wc back to the control module. The control module corrects the cooling power of several heat exchange devices to A1 times, where A1=lg(x)+1, x=Wc / Wc0, and Wc0 is a preset reference temperature threshold; when x≤1, x takes the value of 1.

4. The heat exchange device for fluidized bed processing of plant resin powder according to claim 1, characterized in that: The cooling power of several heat exchange devices is arranged in descending order along the material flow direction in the fluidized bed. Let the power of the heat exchange device numbered n be P. Then the power difference between the heat exchange device numbered n and the next heat exchange device along the material flow direction is ΔPn=Pn-P(n+1), and ΔP1>ΔP2>...>ΔPn-1.

5. The heat exchange device for fluidized bed processing of plant resin powder according to claim 4, characterized in that: The sensing module collects the thickness of the material in the fluidized bed and uploads it to the control module. The control module determines whether the material thickness is lower than the set upper limit. If the determination result is yes, the control module reduces the power difference between the two adjacent heat exchange devices by increasing the cooling power.

6. The heat exchange device for fluidized bed processing of plant resin powder according to claim 5, characterized in that: The sensing module collects the material thickness h in the fluidized bed and uploads it to the control module. The control module corrects the power difference ΔPn between two adjacent heat exchange devices to ΔPn×A2×kn, where A2=h0 / h, h0 is the preset reference thickness, and kn=Px / Pn, x=1, 2, ..., n.

7. A control method for a heat exchange device for fluidized bed resin processing, applicable to the heat exchange device for fluidized bed resin processing as described in any one of claims 1 to 6, characterized in that: It also includes the following steps: Step 1: Pass the spray-dried vegetable oil powder into the fluidization equipment; Step 2: Start the fluidized bed and establish a stable gas-solid two-phase flow field; Step 3: The material passes through several heat exchange devices in sequence, and each embedded heat exchange device performs gradient cooling.

Images