Vacuum drying completion judgment system

Abstract

The utility model discloses a vacuum drying completion judgment system, a vacuum drying device is sequentially communicated with a condenser, a waste water tank and vacuumizing equipment through a pipeline, the vacuum drying completion judgment system further comprises a control device and a sensing device, and the control device is in signal control connection with a pressure gauge, a temperature sensor and a flow sensor. Whether drying is completed or not can be automatically judged through programming design of the control device and integration of temperature, pressure, flow and time logic, fool-proof can be effectively achieved, batch fluctuation of the water content of materials can be accurately controlled, the repeated drying frequency is reduced, the yield is improved, the reject ratio caused by the fact that the water content exceeds the standard is reduced, fool-proof is effectively achieved, and the operation error rate of personnel is reduced; the distance between the first temperature sensor and the second temperature sensor is larger than or equal to 2 meters, the temperature difference between the first temperature sensor and the second temperature sensor is increased by 2 DEG C when the distance between the first temperature sensor and the second temperature sensor is increased by 2 meters, and the accurate control rate of the water content of materials is improved through accurate setting of the distance and the temperature difference between the two temperature sensors.

Description

TECHNICAL FIELD

[0001] The utility model relates to vacuum drying technical field especially relates to a vacuum drying completion judging system. BACKGROUND

[0002] Vacuum drying is a kind of drying mode that material is placed under negative pressure condition, and drying material is achieved by heating to boiling point under negative pressure condition or by condensation after lowering temperature.

[0003] Water in material under negative pressure condition boiling point all decrease with the increase of vacuum degree, and water vapor content is reduced by vacuum pump gap dehumidification, so that water and solution in material obtain enough kinetic energy to separate from material surface. Vacuum drying is under negative pressure condition, so that part of material that is easy to oxidize and other chemical changes in drying process can better maintain original characteristics, and material can be better protected by injecting inert gas and then vacuumizing.

[0004] Traditionally, vacuum drying completion judgment in the industry basically relies on experience, that is, through the experience accumulated in the past drying time, and this method does not consider drying capacity, temperature fluctuation in drying process, filter bag blockage and vacuum pipe blockage problem with the increase of drying furnace number, so that the water content of material dried in each furnace will have large fluctuation, and even some need to continue drying, which directly affects material productivity and defective rate.

[0005] Therefore, the present application provides a vacuum drying completion judgment system, which converts drying condition from manual identification to automatic control identification, effectively preventing mistakes. UTILITY MODEL CONTENT

[0006] In view of the problems in the related art, the present application discloses a vacuum drying completion judgment system, which solves the problem of easy error in vacuum drying by manual experience judgment in the related art.

[0007] To achieve the above purpose, the present application provides the following technical scheme:

[0008] A vacuum drying completion judgment system, comprising a vacuum drying device, a condenser connected to the vacuum drying device through a pipeline, a waste water tank connected to the other end of the condenser, and a vacuum pumping device connected to the waste water tank, further comprising a control device and a sensing device, the sensing device comprising a pressure gauge, a temperature sensor and a flow sensor, and the control device being signal control connected with the pressure gauge, the temperature sensor and the flow sensor.

[0009] As a further scheme of the present application: the vacuum drying device is provided with a stirring device, the stirring device comprises a stirring motor and a stirring rod, the stirring rod is arranged in the vacuum drying device, the stirring motor is arranged at the center of the top of the vacuum drying device, and the stirring motor drives the stirring rod to rotate and stir.

[0010] As a further scheme of the present application: the top of the vacuum drying device is provided with a plurality of vacuum filter cartridges, each vacuum filter cartridge is communicated with a branch pipeline, a plurality of branch pipelines are communicated with a main pipeline, the main pipeline is communicated with the condenser, the first temperature sensor and the second temperature sensor are respectively arranged on the main pipeline, the first temperature sensor is arranged at the joint of the branch pipeline and the main pipeline, and the second temperature sensor is arranged at the gas inlet end of the condenser.

[0011] As a further scheme of the present application: the distance between the first temperature sensor and the second temperature sensor is greater than or equal to 2 meters.

[0012] As a further scheme of the present application: the pressure gauge is arranged at the top of the vacuum drying device.

[0013] As a further scheme of the present application: the flow sensor is arranged between the condenser and the wastewater tank.

[0014] As a further scheme of the present application: the control device comprises a control cabinet, a plurality of indicator lights are arranged on the surface of the control cabinet, and a programmable logic controller is arranged in the control cabinet.

[0015] In summary, the beneficial effects of the present application are:

[0016] 1. A vacuum drying completion judgment system, comprising a vacuum drying device, a condenser, a wastewater tank and a vacuumizing equipment which are sequentially communicated through pipelines, a control device and a sensing device, the sensing device comprises but is not limited to a pressure gauge, a temperature sensor and a flow sensor, the control device is in signal control connection with the pressure gauge, the temperature sensor and the flow sensor, the vacuum drying completion judgment system can automatically judge whether the drying is completed through the programming design of the control device and the integration of temperature, pressure, flow and time logic, can effectively prevent mistakes and accurately control the batch fluctuation of material moisture content, reduce the frequency of repeated drying, improve the yield, reduce the defective rate caused by excessive moisture content, effectively prevent mistakes and reduce the personnel operation error rate.

[0017] 2. The distance between the first temperature sensor and the second temperature sensor is greater than or equal to 2 meters, the temperature difference between the first temperature sensor and the second temperature sensor is increased by 2 DEG C every 2 meters of the distance between them, and the accurate setting of the distance and the temperature difference between the two temperature sensors improves the accurate control rate of the material moisture content. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and are used to explain the present application and are not intended to limit the present application in any way.

[0019] In the drawings:

[0020] Figure 1 is a structural schematic diagram of the present application.

[0021] Reference signs annotations:

[0022] 1, vacuum drying device; 2, condenser; 3, waste water tank; 4, vacuumizing equipment; 5, control device; 51, control cabinet; 52, indicator light; 61, pressure gauge; 62, first temperature sensor; 63, second temperature sensor; 64, flow sensor; 71, stirring motor; 72, stirring rod; 8, vacuumizing filter cartridge; 9, branch pipeline; 10, main pipeline; DETAILED DESCRIPTION

[0023] The exemplary embodiments will be described in detail herein below with reference to the drawings. In the following description, unless otherwise indicated, like numbers in the different drawings represent similar or identical elements. The following exemplary embodiments described in the detailed description are not meant to be an all-inclusive description of all aspects of the application. Rather, they are merely examples that can illustrate some aspects of the application as detailed in the appended claims.

[0024] It should be noted that all directional indications, such as up, down, left, right, front, back, etc., are merely used for convenience of description and are not intended to limit the application to any particular orientation.

[0025] In addition, the descriptions such as "first", "second", etc. in the embodiments are only for the purpose of description, and do not mean to specially indicate the order or sequence, nor to limit the present application, but only to distinguish components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed by the present application.

[0026] In order to further understand the content, characteristics and effects of the present application, the following examples are given, and the details are described as follows with reference to the accompanying drawings.

[0027] As shown in Figure 1

[0028] The vacuum drying completion judgment system comprises a vacuum drying device 1, a condenser 2 connected to the vacuum drying device 1 through a pipeline, a waste water tank 3 connected to the other end of the condenser 2, an evacuation device 4 connected to the waste water tank 3, a control device 5, and a sensing device comprising one or more of a pressure gauge 61, a temperature sensor, and a flow sensor 64, wherein the control device 5 is in signal control connection with the pressure gauge 61, the temperature sensor, and the flow sensor 64.

[0029] The vacuum drying device 1 is provided with a stirring device comprising a stirring motor 71 and a stirring rod 72, wherein the stirring rod 72 is arranged inside the vacuum drying device 1, and the stirring motor 71 is arranged at the center of the top of the vacuum drying device 1. The stirring motor 71 drives the stirring rod 72 to rotate and stir the material, which can effectively improve the drying efficiency of the material.

[0030] Specifically, the top of the vacuum drying device 1 is provided with two evacuation filter cartridges 8, each of which is connected to a branch pipeline 9, and the two branch pipelines 9 are connected to a main pipeline 10 which is connected to the condenser 2. The main pipeline 10 is respectively provided with a first temperature sensor 62 and a second temperature sensor 63. The first temperature sensor 62 is arranged at the joint of the branch pipeline 9 and the main pipeline 10, and the second temperature sensor 63 is arranged at the air inlet end of the condenser 2. The distance between the first temperature sensor 62 and the second temperature sensor 63 is greater than or equal to 2 meters. For every additional 2 meters between the first temperature sensor 62 and the second temperature sensor 63, the temperature difference (the temperature difference between the first temperature sensor 62 and the second temperature sensor 63) is set to increase by 2℃.

[0031] The pressure gauge 61 is arranged at the top of the vacuum drying device 1, and the pressure gauge 61 is selected to be corrosion-resistant, shock-resistant, and high-temperature-resistant with data transmission. The flow sensor 64 is arranged between the condenser 2 and the waste water tank 3, and the flow sensor 64 is selected to be a non-contact electrode electromagnetic flow sensor 64 (non-full pipe).

[0032] The control device 5 comprises a control cabinet 51, the surface of which is provided with two indicator lights 52 of red and green, and the inside of the control cabinet 51 is provided with a programmable logic controller.

[0033] ​The vacuum drying device 1 is further provided with a heating drying device, and the vacuum drying device 1 is sequentially connected with a condenser 2, a wastewater tank 3 and a vacuumizing equipment 4 through pipelines, and further comprises a control device 5 and a sensing device, wherein the sensing device includes but is not limited to a pressure gauge 61, a temperature sensor and a flow sensor 64, and the control device 5 is in signal control connection with the pressure gauge 61, the temperature sensor and the flow sensor 64. The vacuum drying device 1 is started synchronously, and whether the drying is completed or not, i.e. whether the water content meets the requirement, is determined according to the sensors at four positions and the drying time. The determination logic is as follows: according to the drying feed weight and the water content of the feed, the first layer logic is set as that the control cabinet 51 displays a red indicator lamp 52 when the drying time is less than A hr, and the second layer logic is three conditions based on the first layer logic: ① negative pressure ≥-0.07 mpa, ② temperature difference ≥20℃, and ③ the flow sensor 64 has no flow display, and when the three conditions are met simultaneously, the control cabinet 51 displays a green indicator lamp 52, i.e. the drying is completed.

[0034] According to the logic setting, the water content fluctuation of the material after drying of each furnace can be controlled within 0.1-0.3% (including the water content measurement error).

[0035] The vacuum drying completion determination system can automatically determine whether the drying is completed through the programming design of the control device 5 and the integration of temperature, pressure, flow and time logic, can effectively prevent mistakes and precisely control the batch fluctuation of the water content of the material, reduces the frequency of repeated drying, improves the yield, reduces the defective rate caused by the water content exceeding the standard, effectively prevents mistakes and reduces the operation error rate of personnel.

[0036] The first temperature sensor 62 and the second temperature sensor 63 are arranged at a distance of greater than or equal to 2 meters, and the temperature difference between the first temperature sensor 62 and the second temperature sensor 63 is increased by 2℃ for each increase of 2 meters of the distance between the two, and through the accurate setting of the distance and the temperature difference between the two temperature sensors, the precise control rate of the water content of the material is improved.

[0037] Finally, it should be noted that: the above disclosure is only the preferred embodiment of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, and those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. The scope of the present application is only limited by the appended claims.

Claims

1. A vacuum drying completion judgment system, comprising a vacuum drying device (1), the vacuum drying device (1) is provided with a condenser (2) through pipeline communication, the other end of the condenser (2) is provided with a waste water tank (3) through pipeline communication, the waste water tank (3) is provided with a vacuumizing device (4) through pipeline communication, characterized in that: The vacuum drying device (1) is provided with a stirring device, the stirring device comprises a stirring motor (71) and a stirring rod (72), the stirring rod (72) is arranged in the vacuum drying device (1), the stirring motor (71) is arranged at the top center of the vacuum drying device (1), and the stirring motor (71) drives the stirring rod (72) to rotate and stir.

2. The vacuum drying completion determination system according to claim 1, characterized by: The top of the vacuum drying device (1) is provided with a plurality of vacuum filter cartridges (8), each vacuum filter cartridge (8) is communicated with a branch pipeline (9), a plurality of branch pipelines (9) are communicated with a main pipeline (10), the main pipeline (10) is communicated with the condenser (2), the first temperature sensor (62) and the second temperature sensor (63) are respectively arranged on the main pipeline (10), the first temperature sensor (62) is arranged at the joint of the branch pipeline (9) and the main pipeline (10), and the second temperature sensor (63) is arranged at the air inlet end of the condenser (2).

3. The vacuum drying completion determination system according to claim 1, characterized by: The distance between the first temperature sensor (62) and the second temperature sensor (63) is greater than or equal to 2 meters.

4. The vacuum drying completion determination system according to claim 3, characterized by: The pressure gauge (61) is arranged at the top of the vacuum drying device (1).

5. The vacuum drying completion determination system according to claim 1, characterized by: The flow sensor (64) is arranged between the condenser (2) and the wastewater tank (3).

6. The vacuum drying completion determination system according to claim 1, characterized by: The control device (5) comprises a control cabinet (51), a plurality of indicator lights (52) are arranged on the surface of the control cabinet (51), and a programmable logic controller is arranged in the control cabinet (51).

7. The vacuum drying completion determination system according to claim 1, characterized by: ​

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