Sectional type self-adjusting moisture fluidized bed system for drying yeast extract

Abstract

The utility model discloses a sectional type self-adjusting moisture fluidized bed system for drying yeast extract, which comprises a fluidized bed, a plurality of air inlets are arranged at the bottom of the fluidized bed, a screen plate is arranged in the fluidized bed, and partition plates are arranged in the fluidized bed among the air inlets. The partition plates and the net plates are matched to divide the space communicated with all the air inlets into mutually independent heating chambers, each heating chamber is connected with a heat supply unit, a discharging port of the fluidized bed is connected with a powder storage tank through an elephant trunk, a near-infrared spectrometer is arranged on the elephant trunk, and the near-infrared spectrometer is connected with the heating chambers. The near-infrared spectrometer is electrically connected with each heat supply unit through an external controller to form linkage matching, the moisture of discharged powder can be detected through the near-infrared spectrometer, so that the temperature and power of overall inlet air are adjusted, the self-control performance is high, and the moisture content of the powder is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of yeast production and processing equipment, and in particular to a segmented self-regulating fluidized bed system for drying yeast extract. Background Technology

[0002] Existing yeast powders require drying in a fluidized bed system before packaging to control moisture and temperature. However, existing fluidized bed systems present the following problems with yeast powders during use:

[0003] Existing moisture detection methods are lagging, typically requiring manual sampling at regular intervals, followed by adjustments to data such as inlet air temperature based on the results, resulting in a high product moisture defect rate. Secondly, this adjustment method has a low degree of automation, cannot automatically adjust based on monitoring results, and involves a large amount of labor and low efficiency. Utility Model Content

[0004] This invention provides a segmented self-regulating fluidized bed system for drying yeast extract, aiming to solve the problems of high product moisture defect rate and low automation caused by the lag in moisture detection during the existing yeast powder drying process.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A segmented self-regulating fluidized bed system for drying yeast extract includes a fluidized bed with several air inlets at the bottom. A mesh plate is installed inside the fluidized bed, and partitions are installed between the air inlets. The partitions and mesh plates work together to divide the space connected to each air inlet into independent heating chambers. Each heating chamber is connected to a heating unit. The outlet of the fluidized bed is connected to a powder storage tank via a chute. A near-infrared spectrometer is installed on the chute, and the sensing end of the near-infrared spectrometer is inductively coupled with the material inside the chute. The near-infrared spectrometer is electrically connected to each heating unit via an external controller to form a linkage mechanism.

[0007] Preferably, each heating unit includes an air heat exchanger. The first inlet of each air heat exchanger is connected to an external steam source through a regulating valve. The second inlet of each air heat exchanger is connected to an external cold air source through a corresponding variable frequency fan. The outlet of each air heat exchanger connected to the second inlet is connected to the air inlet of the corresponding heating chamber through a pipe, and a corresponding thermometer is provided on the pipe.

[0008] More preferably, the regulating valve is a solenoid valve, and the regulating valve, the variable frequency fan, and the thermometer are all electrically connected to an external controller.

[0009] Furthermore, the external controller is a PLC controller.

[0010] Preferably, the partitions are all arranged vertically, and several partitions are arranged at equal intervals along the fluidized bed arrangement direction.

[0011] More preferably, the number of air inlets is n, and the number of partitions is n-1, where n≥2.

[0012] Preferably, the top of the chute is connected to the outlet of the fluidized bed, the bottom of the chute is connected to the powder storage tank through a discharge valve, and the near-infrared spectrometer is located in the middle of the chute.

[0013] The beneficial effects of this utility model are:

[0014] This invention uses a near-infrared spectrometer to monitor the moisture content of the powder at the outlet of the fluidized bed in real time. When the moisture content exceeds the set value, the temperature or power of the heating unit is increased by an external controller to further ensure the drying effect, ensure the real-time nature of the data, and improve the overall level of automation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the system connection of this utility model;

[0016] In the diagram: 1. Fluidized bed; 2. Mesh plate; 3. Baffle; 4. Air inlet; 5. Heating chamber;

[0017] 6. Heating unit; 61. Variable frequency fan; 62. Regulating valve; 63. Air heat exchanger; 64. Thermometer;

[0018] 7. Chute; 8. Feed valve; 9. Near-infrared spectrometer; 10. Powder storage tank. Detailed Implementation

[0019] The embodiments will be further described below with reference to the accompanying drawings.

[0020] like Figure 1As shown in the preferred embodiment 1, a segmented self-regulating fluidized bed system for drying yeast extract includes a fluidized bed 1. The bottom of the fluidized bed 1 is provided with several air inlets 4. A mesh plate 2 is provided inside the fluidized bed 1. Each fluidized bed 1 between the air inlets 4 is provided with a partition 3. The partition 3 and the mesh plate 2 cooperate to divide the space connected by each air inlet 4 into independent heating chambers 5. Each heating chamber 5 is connected to a heating unit 6. The outlet of the fluidized bed 1 is connected to a powder storage tank 10 through a chute 7. A near-infrared spectrometer 9 is provided on the chute 7. The sensing end of the near-infrared spectrometer 9 forms a sensing interaction with the material in the chute 7. The near-infrared spectrometer 9 is electrically connected to each heating unit 6 through an external controller to form a linkage. The moisture content of the material at the discharge end of the fluidized bed 1 is analyzed in real time by the near-infrared spectrometer 9. When the moisture content is too high, the heating unit 6 can be controlled in real time to increase the output and make automatic adjustments. At the same time, when the moisture content returns to the set range, the output is reduced to prevent the temperature from being too high. The independent heating chamber 5 improves the heating efficiency and can realize gradient heating to ensure drying efficiency and the temperature at the discharge end.

[0021] Each heating unit 6 includes an air heat exchanger 63. The first inlet of each air heat exchanger 63 is connected to an external steam source via a regulating valve 62. The second inlet of each air heat exchanger 63 is connected to an external cold air source via a corresponding variable frequency fan 61. The outlet of each air heat exchanger 63, connected to the second inlet, is connected to the air inlet 4 of the corresponding heating chamber 5 via a pipe, and a corresponding thermometer 64 is installed on the pipe. After heat exchange with the steam, the cold air is introduced into the fluidized bed 1. The variable frequency fan 61 facilitates control of the fan frequency of each heating unit 6, the thermometer 64 facilitates monitoring of the temperature of each heating unit 6, and the regulating valve 62 is used to control the steam flow rate, thereby controlling the temperature of each heating unit 6.

[0022] The regulating valve 62 is a solenoid valve, and the regulating valve 62, the variable frequency fan 61, and the thermometer 64 are all electrically connected to an external controller. This facilitates the formation of automatic control.

[0023] The external controller is a PLC controller, which facilitates the establishment of automatic control.

[0024] Preferably, the near-infrared spectrometer 9 can be an NIR25S near-infrared spectrometer, and the PLC controller can be an OHR-PR10 PLC controller.

[0025] In a preferred embodiment 2, the temperature and output power of the heating unit 6 are arranged in a gradient, with the temperature and output power decreasing sequentially along the arrangement direction of the independent heating chambers 5. This ensures drying efficiency and also guarantees cooling of the material at the tail end, facilitating discharge.

[0026] As a preferred embodiment 3, there are four air inlets 4, which are divided into four independent heating chambers 5 by partitions 3 along the arrangement direction of the fluidized bed 1, and each heating chamber is connected to a corresponding heating unit 6.

[0027] The temperatures of the heating unit 6 along the arrangement direction of the fluidized bed 1 are 55℃, 50℃, 40℃, and 30℃, respectively.

[0028] The power of the variable frequency fan 61 of the heating unit 6 along the arrangement direction of the fluidized bed 1 is 55%, 50%, 45%, and 40% of the total power, respectively.

[0029] Ensure that the discharge temperature is not too high and facilitate discharge.

[0030] As a preferred embodiment 4, the method of using the system includes the following steps:

[0031] S1, when the moisture content is detected to be too high, the gas supply to each heating unit 6 is first heated by regulating valve 62. If the moisture content decreases, the temperature after heating is maintained until the moisture content returns to normal. If the moisture content does not decrease, proceed to S2.

[0032] S2, when the moisture level is still too high, increase the output power of each variable frequency fan 61 to increase the airflow. If the moisture level drops, maintain the increased output power until the moisture level returns to normal. If the moisture level does not drop, proceed to S3.

[0033] S3, reduce the feed rate at the feed inlet of fluidized bed 1 until the moisture content decreases.

[0034] Because there are requirements for the maximum temperature of the product, there are upper limits to both the temperature increase and the wind speed increase. If the moisture content is still unsatisfactory even after reaching the upper limit, the feed rate is adjusted by reducing it.

[0035] In a preferred embodiment 5, all the partitions 3 are arranged vertically, and several partitions 3 are arranged at equal intervals along the arrangement direction of the fluidized bed 1. This facilitates the formation of independent heating chambers 5 and allows for gradient design.

[0036] The number of air inlets 4 is n, and the number of partitions 3 is n-1, where n is a natural number ≥2, to ensure the formation of the heating chamber 5.

[0037] In a preferred embodiment 6, the top of the chute 7 is connected to the outlet of the fluidized bed 1, and the bottom of the chute 7 is connected to the powder storage tank 10 via a discharge valve 8. A near-infrared spectrometer 9 is positioned in the middle of the chute 7 to ensure real-time moisture monitoring.

[0038] Preferably, the chute 7 is arranged at a 45° angle and is equipped with a sight glass for easy use.

[0039] The working principle of this utility model:

[0040] This invention uses a near-infrared spectrometer 9 to monitor the moisture content of the powder at the discharge end of the fluidized bed 1 in real time. When the moisture content exceeds the set value, the temperature or power of the heating unit 6 is increased by an external controller to further ensure the drying effect, ensure the real-time nature of the data, and improve the overall automation level.

Claims

1. A segmented self-regulating fluidized bed system for drying yeast extract, comprising a fluidized bed (1), wherein the bottom of the fluidized bed (1) is provided with a plurality of air inlets (4), and a mesh plate (2) is provided inside the fluidized bed (1), characterized in that, Each fluidized bed (1) located between air inlets (4) is equipped with a partition (3), and the partition (3) and the mesh plate (2) cooperate to divide the space connected by each air inlet (4) into independent heating chambers (5). Each heating chamber (5) is connected to a heating unit (6). The outlet of the fluidized bed (1) is connected to the powder storage tank (10) through a chute (7). A near-infrared spectrometer (9) is provided on the chute (7), and the sensing end of the near-infrared spectrometer (9) forms a sensing cooperation with the material in the chute (7). The near-infrared spectrometer (9) is electrically connected to each heating unit (6) through an external controller to form a linkage cooperation.

2. The segmented self-regulating fluidized bed system for drying yeast extract according to claim 1, characterized in that, Each of the heating units (6) includes an air heat exchanger (63). The first inlet of the air heat exchanger (63) is connected to an external steam source through a regulating valve (62). The second inlet of the air heat exchanger (63) is connected to an external cold air source through a corresponding variable frequency fan (61). The outlet of the air heat exchanger (63) connected to the second inlet is connected to the air inlet (4) of the corresponding heating chamber (5) through a pipe, and a corresponding thermometer (64) is provided on the pipe.

3. The segmented self-regulating fluidized bed system for drying yeast extract according to claim 2, characterized in that, The regulating valve (62) is a solenoid valve, and the regulating valve (62), the variable frequency fan (61) and the thermometer (64) are all electrically connected to an external controller.

4. The segmented self-regulating fluidized bed system for drying yeast extract according to claim 3, characterized in that, The external controller is a PLC controller.

5. A segmented self-regulating fluidized bed system for drying yeast extract according to any one of claims 1 to 4, characterized in that, The partitions (3) are all arranged vertically, and several partitions (3) are arranged at equal intervals along the direction of the fluidized bed (1).

6. The segmented self-regulating fluidized bed system for drying yeast extract according to claim 5, characterized in that, The number of air inlets (4) is n, and the number of partitions (3) is n-1, where n≥2.

7. A segmented self-regulating fluidized bed system for drying yeast extract according to any one of claims 1 to 4, characterized in that, The top of the chute (7) is connected to the outlet of the fluidized bed (1), and the bottom of the chute (7) is connected to the powder storage tank (10) through the feed valve (8). The near-infrared spectrometer (9) is located in the middle of the chute (7).

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