Feeding device for preparing superparamagnetic ferrite nanoparticles through high-temperature thermal decomposition

Abstract

The utility model relates to the technical field of production of nano composite materials, in particular to a feeding device for preparing superparamagnetic ferrite nano particles through high-temperature thermal decomposition. Comprising a powder material feeding module, a liquid material feeding module, a powder material quantitative container, a liquid material quantitative container, a material level information acquisition module, a liquid level information acquisition module, an electric scraper mechanism, a three-degree-of-freedom mechanical arm, an inclined diversion trench, a material collector, a reaction kettle and a control module, different requirements of different material systems on weighing equipment can be avoided, the control precision requirements of automatic feeding, weighing and excess are reduced, the response speed is high, and implementation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of nanocomposite material production technology, specifically a feeding device for preparing superparamagnetic ferrite nanoparticles by high-temperature thermal decomposition. Background Technology

[0002] High-temperature thermal decomposition is a mature and efficient method for preparing superparamagnetic ferrite nanoparticles, which exhibit low defect rates and excellent crystallinity. In the preparation of superparamagnetic ferrite nanoparticles, the raw materials required for synthesis need to be prepared into a reaction mixture according to a specific weight ratio. The existing technology "Construction and Biomedical Application Research of Sub-5 Nanoparticle Ferrite Particles T1 Contrast Agent" discloses a reaction mixture required for preparing sub-5 nanoparticle manganese ferrite nanoparticles (Doctoral Electronic Journal, Issue 2, Page 20, 20190215), specifying the exact weights of ferric erucate, manganese oleate, oleic acid, oleyl alcohol, and benzyl ether in the reaction mixture. Only a reaction mixture meeting this weight relationship, under specific process conditions and steps, can prepare the required superparamagnetic ferrite nanoparticles.

[0003] In the preparation of superparamagnetic ferrite nanoparticles, the formulation of the reaction mixture mainly involves two types of material systems: powder raw materials and liquid precursors. In laboratory operations, powder materials such as iron salts and dispersants are usually weighed manually, and the target mass value is directly obtained through an electronic balance. This method has three significant advantages: intuitive operation, with real-time digital display of mass parameters and physical addition / reduction operations synchronized, enabling rapid and precise mass control down to the milligram level; process compatibility, suitable for the independent weighing of various powders, such as FeCl3 and dextran, avoiding cross-contamination, especially suitable for processes requiring stepwise feeding; and adjustable flexibility, allowing for rapid optimization experiments of the proportions by adding or removing weights or raw material mass, which is crucial for studying the effect of the Fe / O molar ratio on the magnetic properties of the product. Liquid materials, such as organic solvents and surfactant solutions, are often measured by volume using a pipette or graduated cylinder, and mass calibration is performed when necessary using density conversion, forming a complete quality control scheme for the reaction system.

[0004] To expand production, replacing manual operations with automated equipment is essential. Current technology for automated feeding of powder raw materials uses vacuum feeders and screw metering to control the weighing. Weighing tanks with integrated weighing sensors monitor the weight in real time; if the weight exceeds the limit, a reverse screw is activated to collect excess material to a buffer bin, or a diversion valve directs the overweight batch to a reprocessing line. For liquid materials, high-precision piston pumps and flow monitoring modules are used for weighing control. Dynamic weighing sensors are integrated into the conveying pipe outlet to monitor the container weight in real time; pumping is paused when the weight deviation exceeds a preset value.

[0005] Based on weighing and metering, powder raw materials and liquid raw materials require two sets of feeding and weighing systems. Moreover, the above solutions are costly and difficult to control. In order to simplify the equipment and improve efficiency, it is necessary to provide a feeding device for preparing superparamagnetic ferrite nanoparticles by high-temperature thermal decomposition, so as to avoid different requirements for weighing equipment for different material systems and reduce the control accuracy requirements for automatic feeding, weighing and over-quantity. Utility Model Content

[0006] The present invention discloses a feeding device for preparing superparamagnetic ferrite nanoparticles by high-temperature pyrolysis, which uses volume counting instead of weight counting as the feeding control method for the reaction mixture of superparamagnetic ferrite nanoparticles prepared by high-temperature pyrolysis.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a feeding device for preparing superparamagnetic ferrite nanoparticles by high-temperature thermal decomposition, comprising: a powder material feeding module, a liquid material feeding module, a powder material metering container, a liquid material metering container, a level information acquisition module, a liquid level information acquisition module, an electric scraper mechanism, a three-degree-of-freedom robotic arm, an inclined guide channel, a material collector, a reaction vessel, and a control module. The powder material metering container is mounted on the end effector of the three-degree-of-freedom robotic arm, and an electric scraper mechanism and a level information acquisition module are arranged along the upper edge of the powder material metering container. The liquid material metering container is mounted on the end effector of the three-degree-of-freedom robotic arm, and a liquid level information acquisition module is arranged along the upper edge of the liquid material metering container. An inclined guide channel and a material collector are arranged below the powder material metering container and the liquid material metering container. The powder material feeding module, the liquid material feeding module, the level information acquisition module, the liquid level information acquisition module, the electric scraper mechanism, and the three-degree-of-freedom robotic arm are connected to the control module via wired or wireless means.

[0008] Preferably, the powder material feeding module is a vacuum feeder or a screw conveyor.

[0009] Preferably, the liquid material feeding module is a pneumatic feeder or a plunger pump filling system.

[0010] Preferably, the inner walls of the powder material metering container and the liquid material metering container are coated with polytetrafluoroethylene.

[0011] Preferably, the inner wall of the powder material metering container is provided with a spiral guide groove.

[0012] Preferably, the level information acquisition module is one of an ultrasonic level sensor, a laser level detection device, or a radio frequency admittance level gauge.

[0013] Preferably, the liquid level information acquisition module is one of a photoelectric liquid level sensor, a float-type liquid level sensor, a float ball-type liquid level sensor, a hydrostatic liquid level sensor, or an ultrasonic liquid level sensor.

[0014] Preferably, the scraper material of the electric scraper mechanism is tungsten carbide alloy.

[0015] Preferably, the blade edge of the electric scraper mechanism is a nano-polished scraper blade edge.

[0016] Preferably, the control module is an edge computer or a PLC controller.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. Using volumetric measurement instead of gravimetric measurement as the feeding control method for the reaction mixture of superparamagnetic ferrite nanoparticles prepared by high-temperature thermal decomposition can avoid the dynamic errors caused by powder suspension error and material impact force, sensor nonlinear response, etc. in the existing weighing and metering-based technical solutions.

[0019] 2. The level information acquisition module and liquid level information acquisition module can use non-contact sound and light as capacity control signals, which effectively avoids the risk of contamination caused by direct contact between traditional sensors and materials or containers, thereby significantly reducing the calibration frequency caused by adhesion residue, media corrosion or cross-contamination.

[0020] 3. Volume control can be adjusted in real time, and the equipment has a fast dynamic response. It can quickly stop feeding under the signal feedback of the material level acquisition module and the liquid level acquisition module. When the powder material is over-capacity, the excess material on the surface is scraped off by the electric scraper mechanism and recovered by the inclined guide channel. When the liquid material is over-capacity, it automatically overflows and is recovered by the inclined guide channel. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0022] In the diagram: 1. Powder material feeding module, 2. Liquid material feeding module, 3. Powder material metering container, 4. Liquid material metering container, 5. Level information acquisition module, 6. Liquid level information acquisition module, 7. Electric scraper mechanism, 8. Three-degree-of-freedom robotic arm, 9. Inclined guide channel, 10. Material collector, 11. Reactor, 12. Control module. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example

[0025] As attached Figure 1 The device shown is a feeding apparatus for preparing superparamagnetic ferrite nanoparticles by high-temperature thermal decomposition, comprising: a powder material feeding module 1, a liquid material feeding module 2, a powder material metering container 3, a liquid material metering container 4, a level information acquisition module 5, a liquid level information acquisition module 6, an electric scraper mechanism 7, a three-degree-of-freedom robotic arm 8, an inclined guide channel 9, a material collector 10, a reaction vessel 11, and a control module 12. The device is characterized in that the powder material metering container 3 is mounted on the end effector of the three-degree-of-freedom robotic arm 8, and an electric scraper is provided along the upper edge of the powder material metering container 3. The electric scraper mechanism 7 and the level information acquisition module 5 are included. The liquid material metering container 4 is mounted on the end effector of the three-degree-of-freedom robotic arm 8. The liquid material metering container 4 is equipped with a level information acquisition module 6 along its upper edge. The powder material metering container 3 and the liquid material metering container 4 are equipped with an inclined guide channel 9 and a material collector 10. The powder material feeding module 1, the liquid material feeding module 2, the level information acquisition module 5, the level information acquisition module 6, the electric scraper mechanism 7, and the three-degree-of-freedom robotic arm 8 are connected to the control module 12 via wired or wireless means.

[0026] This embodiment is the most basic implementation. In this embodiment, after power is turned on, the control module 12 starts the electrically controlled powder material feeding module 1 and liquid material feeding module 2. The powder material enters the powder material metering container 3 through the powder material feeding module 1. When the measuring beam of the level information acquisition module 5, located on the upper edge of the powder material metering container 3, encounters the material surface, it is reflected back to the receiver, confirming that the powder material has reached the preset capacity position. The signal is then transmitted to the control module 12 to stop the powder material feeding module 1 from working. Then, the electric scraper mechanism 7 on the upper edge of the powder material metering container 3 is opened. The electric scraper mechanism 7 moves horizontally along the upper edge of the powder material metering container 3, scraping away the excess powder material before returning to its original position. Initially, liquid material enters liquid material metering container 4 through liquid material feeding module 2. When the measuring beam of liquid level information acquisition module 6 located on the upper edge of liquid material metering container 4 encounters the material surface, it is reflected back to the receiver, confirming that the liquid material has reached the preset capacity position. The signal is then transmitted to control module 12 to control liquid material feeding module 2 to stop working. If there is overcapacity, it will automatically overflow. Three-degree-of-freedom robotic arm 8 rotates powder material metering container 3 and liquid material metering container 4 to above reactor 11. The three-degree-of-freedom robotic arm 8 is then flipped to pour the powder material in powder material metering container 3 and the liquid material metering container 4 into reactor 11.

[0027] The above embodiments are provided merely for the purpose of describing the present invention and are not intended to limit the scope of the present invention. All equivalent substitutions and modifications made without departing from the spirit and principles of the present invention should be covered within the scope of the present invention.

Claims

1. A feeding device for the preparation of superparamagnetic ferrite nanoparticles by high temperature thermal decomposition, comprising: The powder material feeding module, the liquid material feeding module, the powder material quantitative container, the liquid material quantitative container, the material level information acquisition module, the liquid level information acquisition module, the electric scraper mechanism, the three-degree-of-freedom mechanical arm, the inclined flow guide groove, the material collector, the reaction kettle, and the control module are characterized in that the powder material quantitative container is arranged on the end effector of the three-degree-of-freedom mechanical arm, the electric scraper mechanism and the material level information acquisition module are arranged on the powder material quantitative container, the liquid material quantitative container is arranged on the end effector of the three-degree-of-freedom mechanical arm, the liquid level information acquisition module is arranged on the liquid material quantitative container, the powder material quantitative container and the liquid material quantitative container are provided below with the inclined flow guide groove and the material collector, and the powder material feeding module, the liquid material feeding module, the material level information acquisition module, the liquid level information acquisition module, the electric scraper mechanism, and the three-degree-of-freedom mechanical arm are connected to the control module through wired or wireless connection.

2. The feeding device for preparing superparamagnetic ferrite nanoparticles by high-temperature thermal decomposition according to claim 1, characterized in that: The powder material feeding module is a vacuum feeding machine or a screw conveyor.

3. The feeding device for preparing superparamagnetic ferrite nanoparticles by high-temperature thermal decomposition according to claim 1, characterized in that: The liquid material feeding module is a pneumatic feeding machine or a plunger pump filling system.

4. The feeding device for preparing superparamagnetic ferrite nanoparticles by high-temperature thermal decomposition according to claim 1, characterized in that: The inner walls of the powder material quantitative container and the liquid material quantitative container are coated with a polytetrafluoroethylene coating.

5. The feeding device for preparing superparamagnetic ferrite nanoparticles by high-temperature thermal decomposition according to claim 1, characterized in that: The inner wall of the powder material quantitative container is provided with a spiral flow guide groove.

6. The feeding device for preparing superparamagnetic ferrite nanoparticles by high-temperature thermal decomposition according to claim 1, characterized in that: The material level information acquisition module is one of an ultrasonic material level sensor, a laser material level detection device, or a radio frequency admittance material level meter.

7. The feeding device for preparing superparamagnetic ferrite nanoparticles by high-temperature thermal decomposition according to claim 1, characterized in that: The liquid level information acquisition module is one of a photoelectric liquid level sensor, a float type liquid level sensor, a floating ball type liquid level sensor, a static pressure type liquid level sensor, or an ultrasonic liquid level sensor.

8. The feeding device for preparing superparamagnetic ferrite nanoparticles by high-temperature thermal decomposition according to claim 1, characterized in that: The scraper material of the electric scraper mechanism is tungsten carbide alloy.

9. The feeding device for preparing superparamagnetic ferrite nanoparticles by high-temperature thermal decomposition according to claim 1, characterized in that, The scraper edge of the electric scraper mechanism is a nano-polished scraper edge.

10. The feeding device for preparing superparamagnetic ferrite nanoparticles by high-temperature thermal decomposition according to claim 1, characterized in that: The control module is an edge computer or a PLC controller.

Images