Reaction kettle for preparing perovskite quantum dots
By setting a jacket layer and non-contact heating coil in the reactor, combined with an elastic expansion bladder and sensors, the problem of inaccurate temperature and pressure control in the preparation of perovskite quantum dots was solved, enabling rapid adjustment of reactor temperature and process control, thereby improving the quality and performance of quantum dots.
Patent Information
- Application Number
- CN202423209024.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-25
AI Technical Summary
In existing perovskite quantum dot fabrication processes, temperature and pressure are difficult to precisely control, which affects the quality and performance of the quantum dots.
Design a reaction vessel with a jacket layer on the outside and a heating coil in an annular space inside. The vessel temperature can be quickly and accurately adjusted by circulating the heating coil with the heat medium in the jacket layer through non-contact heating. It is also equipped with an elastic expansion bladder to absorb thermal expansion stress and process control is achieved by combining a stirring shaft and sensors.
Precise temperature and pressure control was achieved during the perovskite quantum dot preparation process, improving the quality and performance stability of the quantum dots.
Smart Images
Figure CN223517533U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to perovskite quantum dot preparation technical field, especially for a kind of reaction kettle for preparing perovskite quantum dot. BACKGROUND
[0002] Perovskite quantum dot preparation process includes the following steps: 1) preparation of first mixed system. Mix lead source, mercaptan and organic solvent. Perform first heating treatment at 80-130℃, and stir the mixture to ensure uniform heating. Perform first vacuum treatment to remove gases and impurities in the mixture. 2) preparation of second mixed system. Mix the first mixed system with cesium oleate. Perform second vacuum treatment, generally for 5-60 minutes, to further remove gases and impurities. Perform second heating treatment at 160-180℃ to allow the mixture to react fully. 3) generation of perovskite quantum dots. Mix the second mixed system with oleylamine bromide. Perform the reaction under vacuum conditions, generally for 12-18 minutes. During the reaction, the growth rate and size of the quantum dots can be controlled by controlling the temperature and pressure. After the reaction is complete, cool the mixture to room temperature. Perform solid-liquid separation to obtain perovskite quantum dots.
[0003] It is obvious that the entire process involves multiple different temperature ranges, and the temperature range is narrow in some parts. During the entire preparation process, temperature and pressure need to be strictly controlled to ensure the quality and performance of the quantum dots. SUMMARY
[0004] The utility model aims at providing a kind of reaction kettle for preparing perovskite quantum dot with the temperature of precise adjustment benefit, specifically by the following technical solutions:
[0005] A reaction kettle for preparing perovskite quantum dots is provided. The kettle body of the reaction kettle is provided with a jacket layer outside, thereby forming an annular space between the jacket layer and the kettle body. A heating coil that surrounds the kettle body is built-in the annular space, and the heating coil is in non-contact with the kettle body. The two ends of the heating coil respectively pass out of the jacket layer and extend to the outside of the jacket layer. The jacket layer is provided with a liquid inlet pipe and a liquid outlet pipe that communicate with the annular space, and the liquid inlet pipe and the liquid outlet pipe are provided with valves. The heating coil is connected with a first heat medium source, and the liquid inlet pipe and the liquid outlet pipe of the jacket are connected with a second heat medium source. When in use, the annular space is filled with the second heat medium, and the valves of the liquid inlet pipe and the liquid outlet pipe are closed. The first heat medium of high temperature circulates in the heating coil, and the temperature of the second heat medium is raised by the heating coil, thereby raising the temperature inside the kettle body. When cooling is needed, the valves of the liquid inlet pipe and the liquid outlet pipe are opened, and the second heat medium of high temperature is gradually replaced by the second heat medium of normal temperature outside, so that the temperature of the kettle body is effectively lowered.
[0006] The outlet pipe is connected with an elastic expansion bag.
[0007] The outlet pipe is connected with a branch pipe, the elastic expansion bag is arranged in an outer shell, the outer shell is fixedly connected with the branch pipe, the elastic expansion bag is communicated with the branch pipe, and the elastic expansion bag is abutted against the bottom of the outer shell through a spring.
[0008] The inner wall of the jacket layer is provided with a plurality of supporting blocks corresponding to the heating coil, and a plurality of sections of the spiral heating coil arranged in the middle portion of the heating coil are arranged on the supporting blocks.
[0009] The middle portion of the kettle body is longitudinally provided with a stirring shaft, and the lower portion of the stirring shaft is provided with stirring blades.
[0010] The upper portion of the kettle body is connected with a feeding pipe.
[0011] The kettle body is provided with a temperature sensor.
[0012] The upper portion of the kettle body is provided with a pressure sensor and a pressure relief valve.
[0013] The kettle body is connected with a vacuum pump.
[0014] The kettle body is provided with a temperature sensor.
[0015] The heating coil in the jacket is not in contact with the kettle body, the first heat medium in the heating coil and the second heat medium in the jacket are adjusted to quickly and accurately adjust the temperature in the kettle body, and thus the preparation process of the perovskite quantum dots is accurately controlled. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a structural schematic diagram of an embodiment of the utility model.
[0017] Figure 2 is an elastic expansion bag structure schematic diagram. DETAILED DESCRIPTION
[0018] The utility model is further illustrated in the following description of drawings and embodiments:
[0019] As shown in Figure 1 A reaction kettle for preparing perovskite quantum dots, the kettle body 1 of the reaction kettle is provided with a jacket layer 2 outside, so that an annular space is formed between the jacket layer and the kettle body; a heating coil 3 is arranged around the kettle body in the annular space, and the heating coil is in non-contact with the kettle body; the two ends of the heating coil extend out of the jacket layer and extend to the outside of the jacket layer, respectively; the jacket layer 2 is provided with a liquid inlet pipe 21 and a liquid outlet pipe 22 which are in communication with the annular space, and the liquid inlet pipe and the liquid outlet pipe are provided with valves (not shown in the figure); the heating coil 3 is connected with a first heat medium source, and the liquid inlet pipe and the liquid outlet pipe of the jacket are connected with a second heat medium source; in use, the annular space is filled with the second heat medium, and the valves of the liquid inlet pipe and the liquid outlet pipe are closed; the first heat medium of high temperature circulates in the heating coil, and the second heat medium raises the temperature in the kettle body after the heating coil raises the temperature of the second heat medium; when cooling is needed, the valves of the liquid inlet pipe and the liquid outlet pipe are opened, and the second heat medium of high temperature is gradually replaced by the second heat medium of normal temperature outside, so that the temperature of the kettle body is effectively reduced.
[0020] Considering the change of the force caused by the change of the temperature of the second heat medium on the jacket layer, an elastic expansion bag 4 is connected beside the liquid outlet pipe, specifically, a branch pipe is connected beside the liquid outlet pipe, the elastic expansion bag is arranged in an outer shell 41, the outer shell is fixedly connected with the branch pipe, the elastic expansion bag is in communication with the branch pipe, and the elastic expansion bag is abutted with the bottom of the outer shell through a spring 42. In this way, the positive and negative pressure caused by the expansion or contraction of the second heat medium due to the change of the temperature is absorbed by the elastic expansion bag.
[0021] The heating coil and the kettle body of the utility model are non-contact heating coil, and the first heat medium flows in the heating coil, and the gravity easily causes the deformation and falling of the coil to be clamped on the valve body, for this, the inner wall of the jacket layer is provided with a plurality of support blocks 23 corresponding to the heating coil, and the multiple sections of the heating coil in the middle part are arranged on the support blocks. In specific implementation, the jacket layer is set as a welded part composed of two arc-shaped plates, first, the heating coil is sleeved on both sides of the kettle body by using an auxiliary tool, the arc-shaped plates composing the jacket layer are butt-jointed by using the auxiliary tool, and after butt-joint, the arc-shaped plates are rotated by a proper angle in the opposite direction of the spiral direction of the heating coil, so that the support blocks form a supporting effect on the heating coil.
[0022] A stirring shaft 5 is longitudinally arranged in the middle part of the kettle body, and a stirring blade 51 is arranged at the lower part of the stirring shaft. When the stirring shaft rotates, a convection effect is formed in the kettle body, so as to promote the flow of materials and the balance of heat.
[0023] The upper part of the kettle body is connected with a feeding pipe 6. A temperature sensor 7 is arranged in the kettle body. Of course, a pressure sensor and a pressure relief valve are arranged at the upper part of the kettle body.
[0024] The kettle body is connected with a vacuum pump (not shown in the figure), which is used for forming a vacuum environment in the kettle body.
[0025] The heating coil is arranged in the jacket and does not contact the kettle body. The first heat medium in the heating coil and the second heat medium in the jacket are adjusted to quickly and accurately adjust the temperature inside the kettle body, thereby accurately controlling the preparation process of the perovskite quantum dots.
Claims
1. A reaction kettle for preparing perovskite quantum dots, characterized in that, The reaction kettle is provided with a jacket layer outside the kettle body, so that an annular space is formed between the jacket layer and the kettle body; a heating coil is arranged around the kettle body in the annular space, and the heating coil is in non-contact with the kettle body; the two ends of the heating coil respectively extend out of the jacket layer and extend to the outside of the jacket layer, the jacket layer is provided with a liquid inlet pipe and a liquid outlet pipe which are in communication with the annular space, and the liquid inlet pipe and the liquid outlet pipe are provided with valves; the heating coil is connected with a first heat medium source, and the liquid inlet pipe and the liquid outlet pipe of the jacket are connected with a second heat medium source; in use, the annular space is filled with the second heat medium, and the valves of the liquid inlet pipe and the liquid outlet pipe are closed; the first heat medium with high temperature circulates in the heating coil, and after the heating coil increases the temperature of the second heat medium, the second heat medium increases the temperature inside the kettle body; when cooling is needed, the valves of the liquid inlet pipe and the liquid outlet pipe are opened, the second heat medium with high temperature is gradually replaced by the second heat medium with normal temperature outside, so that the temperature of the kettle body is effectively reduced. 2.The reactor for preparing perovskite quantum dots according to claim 1, wherein, The liquid outlet pipe is connected with an elastic expansion bag. 3.The reactor for preparing perovskite quantum dots according to claim 2, wherein, The liquid outlet pipe is connected with a branch pipe, the elastic expansion bag is arranged in an outer shell, the outer shell is fixedly connected with the branch pipe, the elastic expansion bag is in communication with the branch pipe, and the elastic expansion bag is in abutment with the bottom of the outer shell through a spring. 4.The reactor for preparing perovskite quantum dots according to claim 2, wherein, The inner wall of the jacket layer is provided with a plurality of support blocks corresponding to the heating coil, and a plurality of spiral sections in the middle of the heating coil are arranged on the support blocks. 5.The reactor for preparing perovskite quantum dots according to claim 1, wherein, A stirring shaft is longitudinally arranged in the middle of the kettle body, and stirring blades are arranged on the lower part of the stirring shaft. 6.The reactor for preparing perovskite quantum dots according to claim 1, wherein, A feeding pipe is connected to the upper part of the kettle body. 7.The reactor for preparing perovskite quantum dots according to claim 1, wherein, A temperature sensor is arranged in the kettle body. 8.The reactor for preparing perovskite quantum dots according to claim 1, wherein, A pressure sensor and a pressure relief valve are arranged on the upper part of the kettle body. 9.The reactor for preparing perovskite quantum dots according to claim 1, wherein, The kettle body is connected with a vacuum pump.