Scraper evaporator adopting electromagnetic heating

Abstract

The utility model discloses a scraper evaporator adopting electromagnetic heating, which relates to the technical field of evaporators and comprises an evaporation barrel, a space for evaporating materials is arranged in the evaporation barrel, a rotating shaft is rotatably arranged at the center of the inside of the evaporation barrel, one end of the rotating shaft extends out of the feeding end of the evaporation barrel, and a plurality of scraper components are arranged on the rotating shaft. The plurality of scraper assemblies are in close contact with the inner wall of the evaporation barrel; the driving device is connected with the end, extending out of the evaporation barrel, of the rotating shaft, and the driving device is used for driving the rotating shaft to rotate; according to the scheme, a traditional heating medium heating mode is omitted, the electromagnetic heater is adopted to heat the evaporation barrel, compared with the traditional heating mode, the heating speed is high, the heat efficiency is high, materials can be rapidly heated to the evaporation temperature, the preheating time is shortened, energy loss is reduced, and the heating efficiency is improved. And the energy consumption cost in the production process is effectively reduced.

Description

Technical Field

[0001] This utility model relates to a scraped evaporator using electromagnetic heating, belonging to the field of evaporator technology. Background Technology

[0002] With industrial development, scraped-plate evaporators are increasingly widely used in chemical, pharmaceutical, and environmental protection fields. However, most scraped-plate evaporators on the market currently use traditional heat transfer media, such as hot water, steam, and thermal oil, which rely on heat conduction and convection. This often results in low heating efficiency, high energy consumption, uneven and inaccurate temperature control. Electromagnetic heating, on the other hand, generates heat directly inside the container through electromagnetic induction, eliminating the need for heat conduction. This offers advantages such as rapid heating, high energy utilization, and no open flame. Furthermore, electromagnetic heating boasts a particularly high heat conversion rate, reaching up to 98.7%. However, its application in scraped-plate evaporators is not yet widespread. Therefore, we propose a scraped-plate evaporator using electromagnetic heating. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art by providing a scraped evaporator that uses electromagnetic heating.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a scraped evaporator using electromagnetic heating, comprising...

[0005] An evaporation cylinder has a space for material evaporation. A rotating shaft is rotatably arranged at the center of the evaporation cylinder. One end of the rotating shaft extends out of the feed end of the evaporation cylinder. Multiple scraper assemblies are arranged on the rotating shaft, and all of the multiple scraper assemblies are in close contact with the inner wall of the evaporation cylinder.

[0006] A driving device is connected to one end of the rotating shaft that extends out of the evaporation cylinder, and the driving device is used to drive the rotating shaft to rotate.

[0007] An electromagnetic heater, comprising an electromagnetic induction coil, which is fixedly installed on the outer wall of the evaporation cylinder and heats the interior of the evaporation cylinder;

[0008] The control system includes a temperature sensor and a PLC control unit. The temperature sensor is connected and fixed to the evaporation cylinder and is used to monitor the temperature inside the evaporation cylinder. The PLC control unit is electrically connected to the temperature sensor and exchanges information with it. The PLC control unit is used to adjust the temperature inside the evaporation cylinder.

[0009] Preferably, the outer wall of the electromagnetic induction coil is covered with an insulating layer.

[0010] Preferably, a plurality of the scraper assemblies are uniformly fixed on the rotating shaft along the circumferential direction.

[0011] Preferably, the evaporator cylinder has feed ports on both sides of the feed end, and a material distributor is provided between the feed ports on both sides of the evaporator cylinder.

[0012] Preferably, the drive device is equipped with a speed reducer.

[0013] Preferably, a fixing lug is provided on the outer wall of the evaporation cylinder.

[0014] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0015] 1. This utility model eliminates the traditional heating method of heat medium and uses an electromagnetic heater to heat the evaporation cylinder. Compared with the traditional heating method, it has significant advantages of fast heating speed and high thermal efficiency. It can quickly heat the material to the evaporation temperature, reduce preheating time and energy loss, and effectively reduce energy consumption costs in the production process.

[0016] 2. The closed-loop control system composed of temperature sensors and PLC control unit can monitor and adjust the temperature inside the evaporation cylinder in real time and accurately. For temperature-sensitive materials, it can control temperature fluctuations within a very small range, avoiding decomposition and deterioration of materials due to excessive temperature or large fluctuations, thus greatly ensuring product quality. Attached Figure Description

[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0018] Appendix Figure 1 This is a schematic diagram of the structure of a scraper evaporator using electromagnetic heating according to the present invention;

[0019] Appendix Figure 2 For the appendix Figure 1 Enlarged view of point A in the middle;

[0020] Appendix Figure 3 This is a flowchart of the working process of this utility model.

[0021] In the diagram: 1. Evaporator cylinder; 2. Rotating shaft; 3. Scraper assembly; 4. Drive unit; 5. Electromagnetic induction coil; 6. Temperature sensor; 7. Insulation layer; 8. Feed inlet; 9. Material distributor; 10. Reducer; 11. Fixed ear plate. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] As attached Figure 1-3As shown, the scraped evaporator with electromagnetic heating described in this utility model is used for falling film evaporation and continued evaporation of concentrate after MVR evaporation. It includes an evaporation cylinder 1, a drive device 4, an electromagnetic heater, and a control system.

[0024] The evaporator cylinder 1 has a space for material evaporation. Both sides of the feed end of the evaporator cylinder 1 are provided with feed ports 8 to transport materials into the evaporator cylinder 1 from both sides to ensure the feed volume. The materials mentioned in this application refer to high viscosity (such as glycerin, coatings, etc.), easy crystallization, scaling, and heat-sensitive materials.

[0025] A rotating shaft 2 is rotatably installed at the center of the evaporator cylinder 1. One end of the rotating shaft 2 extends out of the feed end of the evaporator cylinder 1. The drive device 4 is connected to the end of the rotating shaft 2 that extends out of the evaporator cylinder 1. The drive device 4 is used to drive the rotating shaft 2 to rotate and provide power to the rotating shaft 2.

[0026] In this embodiment, the drive device 4 is a motor, and a reducer 10 is provided on the drive device 4 to increase the output torque of the drive device 4, so as to flexibly adjust the rotation speed of the shaft 2, thereby meeting the precise control of the rotation speed of the shaft 2 under different material characteristics and process requirements.

[0027] Multiple scraper assemblies 3 are provided on the rotating shaft 2. All scraper assemblies 3 are in close contact with the inner wall of the evaporation cylinder 1. In this embodiment, the multiple scraper assemblies 3 are evenly fixed on the rotating shaft 2 along the circumferential direction to ensure that the scraper assemblies 3 exert uniform force on the inner wall of the evaporation cylinder 1 during the rotation of the rotating shaft 2, so as to avoid equipment wear or material processing effect differences caused by uneven local force.

[0028] During operation, when the material enters the evaporation cylinder 1, it forms a uniform and extremely thin liquid film on the inner wall of the cylinder under the scraping action of the scraper assembly 3.

[0029] The electromagnetic heater includes an electromagnetic induction coil 5, which is fixedly installed on the outer wall of the evaporation cylinder 1 and heats the interior of the evaporation cylinder 1. It should be noted that the electromagnetic heater needs to be connected to a power source. In this embodiment, the outer wall of the electromagnetic induction coil 5 is covered with an insulating layer 7. The insulating layer 7 can be made of high-temperature resistant and high-insulation materials, such as ceramic fiber or mica, which can effectively prevent the heat generated by the electromagnetic induction coil 5 from being dissipated to the outside and avoid safety problems such as short circuits caused by the electromagnetic induction coil 5 coming into contact with external objects.

[0030] The control system includes a temperature sensor 6 and a PLC control unit. The temperature sensor 6 is connected and fixed on the evaporator cylinder 1. The temperature sensor 6 is used to monitor the temperature inside the evaporator cylinder 1. The PLC control unit is electrically connected to the temperature sensor 6 and exchanges information. The PLC control unit is used to adjust the temperature inside the evaporator cylinder 1.

[0031] As a preferred embodiment, a material distributor 9 is provided between the feed inlets 8 on both sides of the evaporation cylinder 1. The material distributor 9 can evenly disperse the material into the internal space of the evaporation cylinder 1, ensuring that the material can form a uniform liquid film on the inner wall of the cylinder under the action of the scraper assembly 3, avoiding the phenomenon of local accumulation or uneven distribution of material, thereby improving the stability and uniformity of the evaporation process.

[0032] Furthermore, a fixing lug 11 is provided on the outer wall of the evaporator cylinder 1 to facilitate the stable installation of the entire scraped evaporator on the bracket or other equipment support structure.

[0033] As attached Figure 3 As shown, the working process of this utility model is as follows:

[0034] Material enters the material distributor 9 through the feed inlet 8 and is evenly dispersed into the evaporation cylinder 1. The PLC control unit sets the heating temperature and controls the electromagnetic heater to heat the inside of the evaporation cylinder 1. The drive device 4 adjusts the speed through the reducer 10, driving the rotating shaft 2 to rotate. The evenly distributed scraper assembly 3 on it rotates accordingly, scraping the material on the inner wall of the evaporation cylinder 1 to form a uniform liquid film. The temperature sensor 6 monitors the temperature inside the evaporation cylinder 1 in real time and feeds the temperature information back to the PLC control unit. The PLC control unit adjusts the power of the electromagnetic heater according to the temperature feedback from the temperature sensor 6 to accurately control the temperature.

[0035] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model; all technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of protection of this utility model.

Claims

1. A scraped evaporator employing electromagnetic heating, characterized in that: Include An evaporation cylinder (1) has a space for material evaporation inside. A rotating shaft (2) is rotatably arranged at the center of the evaporation cylinder (1). One end of the rotating shaft (2) extends out of the feed end of the evaporation cylinder (1). Multiple scraper assemblies (3) are arranged on the rotating shaft (2). All of the multiple scraper assemblies (3) are in close contact with the inner wall of the evaporation cylinder (1). The driving device (4) is connected to one end of the rotating shaft (2) extending out of the evaporation cylinder (1). The driving device (4) is used to drive the rotating shaft (2) to rotate. An electromagnetic heater, comprising an electromagnetic induction coil (5), the electromagnetic induction coil (5) being fixedly installed on the outer wall of the evaporation cylinder (1) and heating the interior of the evaporation cylinder (1); The control system includes a temperature sensor (6) and a PLC control unit. The temperature sensor (6) is connected and fixed on the evaporator cylinder (1) and is used to monitor the temperature inside the evaporator cylinder (1). The PLC control unit is electrically connected to the temperature sensor (6) and interacts with it. The PLC control unit is used to adjust the temperature inside the evaporator cylinder (1).

2. A scraped evaporator using electromagnetic heating according to claim 1, characterized in that: The outer wall of the electromagnetic induction coil (5) is covered with an insulating layer (7).

3. A scraped evaporator employing electromagnetic heating according to claim 1, characterized in that: Multiple scraper assemblies (3) are uniformly fixed on the rotating shaft (2) along the circumferential direction.

4. A scraped evaporator using electromagnetic heating according to claim 1, characterized in that: The evaporator cylinder (1) has feed inlets (8) on both sides of the feed end, and a material distributor (9) is provided between the feed inlets (8) on both sides of the evaporator cylinder (1).

5. A scraped evaporator employing electromagnetic heating according to claim 1, characterized in that: The drive device (4) is equipped with a speed reducer (10).

6. A scraped evaporator employing electromagnetic heating according to claim 1, characterized in that: The outer wall of the evaporator cylinder (1) is provided with a fixing ear plate (11).

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