Hydrothermal reaction device based on rotating magnetic field

Abstract

The invention discloses a hydrothermal reaction device based on a rotating magnetic field. The invention discloses a hydrothermal reaction device based on a rotating magnetic field. The hydrothermal reaction device comprises a reaction kettle, a coil, a silicon steel sheet iron core, an annular eddy current heating body, an inner sleeve barrel, a lining, a kettle cover and a stirrer, and the kettle cover is provided with a temperature and pressure sensor connector and a stress application rod through hole. Alternating current is introduced into the coil to generate a rotating magnetic field, the rotating magnetic field generates eddy current in the annular eddy current heating body to generate heat, so that the reaction kettle is heated, and meanwhile, the rotating magnetic field can drive the magnetic stirrer to stir and play a special role in electromagnetic stirring and directional growth on some magnetic reaction substances; the diffusion and directional crystallization process can be promoted, and the material growth mode is changed. The hydrothermal method and solvothermal method material synthesis device is of great significance to preparation of new materials with special structures and properties.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of hydrothermal synthesis reactor, in particular to a hydrothermal reaction device with eddy current heating, stirring and directional growth functions based on rotating magnetic field. BACKGROUND

[0002] Hydrothermal synthesis reactor is one of the important means for preparing new materials by hydrothermal synthesis. In the process of hydrothermal synthesis reaction, the hydrothermal (solvent) reactants are heated and pressurized in a sealed reactor. Currently, the heating of the hydrothermal reactor is mostly achieved by placing it in an oven. The temperature adjustment function for individual reactors is poor during the heating process, and the flexibility is poor. The structure design of the traditional hydrothermal synthesis reactor is unreasonable, and it cannot effectively stir the mixed liquid in the reactor, and the synergistic effect of the composite external field is not easy to achieve. SUMMARY

[0003] In view of the deficiencies of the structure and function of the existing hydrothermal synthesis reactor, the present application aims to provide a hydrothermal reaction device with eddy current heating, stirring and directional growth functions based on rotating magnetic field.

[0004] The purpose of the present application is achieved by the following technical solutions:

[0005] The present application aims to provide a hydrothermal reaction device with eddy current heating, stirring and directional growth functions based on rotating magnetic field, which comprises a reactor, a coil, a silicon steel sheet core, an annular eddy current heating body, an inner barrel, an inner lining and a cover, and a stirring rod. The cover is provided with a temperature and pressure sensor connection port and a force rod perforation. The coil is a plurality of coils which are placed in the wire slot of the silicon steel sheet core according to the lower line principle of asynchronous motor and are connected according to delta connection or star connection. When alternating current is passed, a rotating magnetic field with a certain frequency is formed. The rotating magnetic field generates eddy current in the annular eddy current heating body to generate heat, thereby heating the reactor. At the same time, the rotating magnetic field can drive the magnetic stirring rod to stir and directly act on some magnetic reaction materials to achieve electromagnetic stirring and directional growth, thereby promoting diffusion and directional crystallization process and changing the growth mode of materials.

[0006] The reactor is made of stainless steel and is connected to the cover by threads or bolts. The cover is provided with a force rod perforation for screwing and a connection port connected to the temperature sensor and the pressure sensor. The connection port is a threaded or flanged connection port.

[0007] The annular eddy current heating body is made of ferromagnetic material and is arranged on the inner barrel at intervals.

[0008] The inner barrel is made of non-magnetic and weak magnetic material.

[0009] The inner lining is made of polytetrafluoroethylene or other materials.

[0010] The temperature and pressure of the reaction kettle can be controlled through the signals of the temperature sensor and the pressure sensor transmitted to the control device.

[0011] The present application has the following advantages:

[0012] The coil is a plurality of coils according to the lower line principle of the asynchronous motor, which is arranged in the wire slot of the silicon steel sheet core and connected in a delta connection or a star connection, and a rotating magnetic field of a certain frequency is formed after alternating current is passed, the rotating magnetic field generates eddy current in the annular eddy current heating body to generate heat, and the reaction kettle is heated, at the same time, the rotating magnetic field can drive the magnetic stirrer to stir and directly play a special role of electromagnetic stirring and directional growth on some magnetic reaction substances, which can promote diffusion and directional crystallization process and change the growth mode of materials. Compared with the platform reaction kettle, the operation and control are convenient and flexible, which is helpful to improve the reaction speed and the uniformity of the crystalline growth, and under certain conditions, the new materials with special structure and appearance and function can be synthesized by the synergistic effect of the magnetic field, the hydrothermal method and the solvothermal method material synthesis device has important significance for preparing new materials with special structure and performance. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structure diagram of a hydrothermal reaction device with eddy current heating, stirring and directional growth function based on a rotating magnetic field;

[0014] Figure 2 is a sectional view of a hydrothermal reaction device with eddy current heating, stirring and directional growth function based on a rotating magnetic field;

[0015] Figure 1 (1) reaction kettle, (2) coil, (3) silicon steel sheet core, (4) annular eddy current heating body, (5) inner sleeve barrel, (6) inner lining, (7) kettle cover, (8) temperature sensor connection port (9) pressure sensor connection port (10) force rod perforation (11) magnetic stirrer. DETAILED DESCRIPTION

[0016] The specific embodiments of the present application will be further described below in combination with the drawings and examples:

[0017] As Figure 1 , Figure 2As shown, the embodiment provides a hydrothermal reaction device with eddy current heating, stirring and directional growth function based on rotating magnetic field. The reaction kettle is made of stainless steel, connected with the kettle cover through threads or bolts, and the kettle cover is provided with a force rod perforation for screwing and a connecting port for connecting with temperature sensor and pressure sensor. The connecting port is a threaded or flange connecting port. A plurality of coils are lowered into the wire slot of the silicon steel sheet core according to the wire lowering principle of asynchronous motor and connected according to delta connection or star connection. After alternating current is passed, a rotating magnetic field with certain frequency is formed. In the implementation process, first, the temperature sensor and pressure sensor are installed on the kettle cover and connected with the control device, the temperature and pressure values are set, then the water or solvent and reaction raw materials and magnetic stirrer are put into the inner lining, the kettle cover and the reaction kettle are connected through threads or bolts to ensure the sealing performance, then the power is started to drive the coil to generate a rotating magnetic field. The rotating magnetic field generates eddy current in the ferromagnetic annular eddy current heating body to heat, realizing the heating of the reaction kettle. The rotating magnetic field can drive the magnetic stirrer to stir the molten liquid. The rotating magnetic field can also directly play an electromagnetic stirring role on some magnetic reaction substances and a special role of promoting directional growth. The annular ferromagnetic eddy current heating body is arranged on the inner sleeve barrel at intervals. At the position without ferromagnetic eddy current heating body, the rotating magnetic field can penetrate directly to the molten liquid to play an electromagnetic stirring role and a directional growth role. The inner sleeve barrel is made of non-magnetic and weak magnetic material. The inner lining of the reaction kettle is made of polytetrafluoroethylene material. The temperature sensor and pressure sensor signal are transmitted to the control device to realize the control of the temperature and pressure of the reaction kettle.

[0018] The above detailed description of the embodiments of the present application, but the content described cannot be considered as limiting the scope of the implementation of the present application. Any equivalent changes and improvements made within the scope of the present application shall still belong to the patent coverage of the present application.

Claims

1. A rotating magnetic field-based hydrothermal reaction apparatus, characterized by comprising: a rotating magnetic field generator; a reaction vessel; and a magnetic field concentrator. It comprises (1) a reaction kettle, (2) a coil, (3) a silicon steel sheet core, (4) a ring-shaped eddy current heating body, (5) an inner sleeve barrel, (6) an inner lining, (7) a kettle cover, (8) a temperature sensor connecting port, (9) a pressure sensor connecting port, (10) a force rod perforation, (11) a magnetic stirring rod, wherein the reaction kettle is made of stainless steel, is connected with the kettle cover through threads or bolts, the kettle cover is provided with a force rod perforation for screwing, and is provided with connecting ports connected with temperature sensors and pressure sensors, the connecting ports are thread or flange connecting ports.

2. The hydrothermal reaction apparatus according to claim 1, wherein The coil is a plurality of coils which are arranged in the wire slot of the silicon steel sheet core according to the lower wire principle of an asynchronous motor, are connected according to a delta connection or a star connection, and form a rotating magnetic field of a corresponding frequency after being connected with alternating current.

3. The hydrothermal reaction apparatus according to claim 1 or claim 2, wherein The rotating magnetic field formed after the coil is connected with alternating current generates eddy current in the ring-shaped eddy current heating body to heat, so as to heat the reaction kettle.

4. The hydrothermal reaction apparatus according to claim 1 or 2, wherein The rotating magnetic field formed after the coil is connected with alternating current drives the magnetic stirring rod to stir, and performs electromagnetic stirring and promotes directional growth of a reaction substance with magnetism.

5. The hydrothermal reaction apparatus according to claim 1 or 3, wherein The ring-shaped eddy current heating body is made of a ferromagnetic material, and is arranged on the inner sleeve barrel at intervals.

6. The hydrothermal reaction apparatus according to claim 1 or 5, wherein The inner sleeve barrel is made of a material with no magnetism or weak magnetism.

7. The hydrothermal reaction apparatus according to claim 1, wherein The inner lining is made of polytetrafluoroethylene or the like.

8. The hydrothermal reaction apparatus according to claim 1, wherein The temperature sensors and the pressure sensors connected with the connecting ports transmit output signals to a control device, so as to control the temperature and the pressure of the reaction kettle according to the signals.

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