Efficient heating structure of graphite digestion furnace

Abstract

The utility model provides an efficient heating structure of a graphite digestion furnace. The efficient heating structure comprises a base, a heat conduction block and a heating assembly, a plurality of fixing pieces are arranged on the heat conduction block, the heat conduction block is fixed to one face of the base through the fixing pieces, part of the heating assembly is arranged on the heat conduction block, and the other part of the heating assembly is used for being connected with the outside. According to the efficient heating structure, the base, the heat conduction block and the heating assembly are installed in a matched mode, the heating uniformity can be well improved, the temperature difference between the edge and the center of the graphite heat conduction block is not larger than 3 DEG C by adjusting the power of the heating rod, the overall temperature rising speed is high, the pretreatment time is well shortened, and the pretreatment efficiency is improved. And moreover, different digestion stages can be adapted through dynamic power adjustment, so that the sample carbonization condition is well avoided.

Description

Technical Field

[0001] This utility model relates to the field of graphite digestion furnace technology, and in particular to a high-efficiency heating structure for a graphite digestion furnace. Background Technology

[0002] A graphite digestion furnace is a laboratory device used for sample pretreatment, primarily for the wet digestion of various samples. It is currently widely used in sample digestion scenarios such as the Kjeldahl method, and must meet requirements such as high-temperature uniform heating, convenient operation, and safety protection.

[0003] Traditional graphite digestion furnaces typically use heating wires to heat the heat-conducting blocks or digestion tubes via thermal radiation. This results in a single heat conduction path, significant energy loss, and lower temperatures at the edges due to rapid heat dissipation. Consequently, digestion time is prolonged, and problems such as sample carbonization or incomplete digestion are more likely to occur. Utility Model Content

[0004] To solve the above problems, the present invention adopts the following technical solution: a high-efficiency heating structure for a graphite digestion furnace, comprising: a base, a heat-conducting block, and a heating component;

[0005] The heat-conducting block is provided with several fixing components, and the heat-conducting block is fixed to one side of the base by the several fixing components. The heating component is partially disposed on the heat-conducting block, and the other part is used for connection with the outside.

[0006] Furthermore, four fixing holes are provided on one side of the base, and the four fixing holes are equally spaced.

[0007] Furthermore, the heat-conducting block is provided with four connectors, each of which corresponds to one of the fixing holes.

[0008] Furthermore, the fixing element is a fixing block, and the number of fixing blocks is four.

[0009] Furthermore, each of the connectors has a connecting hole, and each connecting hole is movably connected to a fixing hole.

[0010] Furthermore, each of the fixed insert portions passes through one of the connecting holes and is inserted into one of the fixed holes.

[0011] Furthermore, the heat-conducting block is made of graphite, and a plurality of heat-conducting holes are provided on the heat-conducting block, with the plurality of heat-conducting holes being equally spaced.

[0012] Furthermore, the heat-conducting block has four mounting holes on its side, and the heating assembly includes four heating rods, each of which is movably inserted into one of the mounting holes.

[0013] Furthermore, each of the heating rods is coated with a graphene coating to enhance thermal conductivity.

[0014] Furthermore, a temperature sensor array is provided on one side of the base, and the temperature sensor array is used to monitor the temperature of the heat-conducting block in real time.

[0015] The beneficial effects of this utility model are as follows: by using this high-efficiency heating structure, the heating uniformity can be greatly improved through the coordinated installation of the base, heat-conducting block and heating components. Furthermore, by adjusting the power of the heating rod, the temperature difference between the edge and center of the graphite heat-conducting block is no more than 3°C. The overall heating rate is fast, which greatly shortens the pretreatment time. Moreover, the dynamic power adjustment can adapt to different digestion stages and effectively avoid sample carbonization. Attached Figure Description

[0016] The accompanying drawings further illustrate the present invention, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0017] Figure 1 A schematic diagram from one direction of an embodiment of a high-efficiency heating structure for a graphite digester furnace;

[0018] Figure 2 This is a schematic diagram from another direction of a high-efficiency heating structure for a graphite digester furnace, provided as an embodiment. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings of the embodiments. This utility model is not limited to the following specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0020] like Figures 1 to 2 As shown, a high-efficiency heating structure for a graphite digestion furnace includes: a base 100, a heat-conducting block 200, and a heating component; the heat-conducting block 200 is provided with several fixing members (not shown in the figure), and the heat-conducting block 200 is fixed to one side of the base 100 by the several fixing members; the heating component is partly disposed on the heat-conducting block 200, and the other part is used for connection with the outside.

[0021] Specifically, the base 100 has four fixing holes 101 on one side, which are equidistantly spaced. The heat-conducting block 200 has four connectors 400, each connector 400 corresponding to one fixing hole 101. The fixing connectors are four fixing blocks. Each connector 400 has a connecting hole 410, which is movably connected to one fixing hole 101. Each fixing block partially passes through a connecting hole 410 and is inserted into a fixing hole 101. The heat-conducting block 200 is made of graphite and has several heat-conducting holes 210 equidistantly spaced. The side of the heat-conducting block 200 has four mounting holes 220, and the heating assembly includes four heating rods 300, each heating rod 300 being movably inserted into one mounting hole 220. Each of the heating rods 300 has a graphene coating on its surface, which enhances heat conduction efficiency. A temperature sensor array (not shown) is disposed on one side of the base 100, which is used to monitor the temperature of the heat-conducting block 200 in real time.

[0022] In other words, using this heating structure, a graphite heat-conducting block 200 is used in conjunction with four heating rods 300. The heat-conducting block 200 has 20 uniformly distributed heat-conducting holes 210, each with a diameter of 43mm, suitable for a 42mm diameter nitrogen tube, and the spacing between each hole is 50mm. Four 16.1mm diameter mounting holes 220 are uniformly distributed at the bottom of the heat-conducting block 200, each containing one of the four heating rods 300. The heating rods 300 are coated with a graphene coating, which significantly enhances heat conduction efficiency. Furthermore, a temperature sensor array is installed on the surface of the base 100, forming an array of several temperature sensors, to monitor the temperature of the heat-conducting block 200 placed above it in real time. Furthermore, each heating rod 300 is connected to an external PLC controller, allowing the PLC controller to adjust the power of each heating rod 300 in real time. Therefore, by dynamically adjusting the power of the heating rod 300 using a temperature sensor array in conjunction with the PLC controller, uniform surface temperature of the graphite heat-conducting block 200 can be effectively achieved. It is worth mentioning that, because the surface of the heating rod 300 is coated with a graphene coating, when the heating rod 300 is powered on, heat diffuses evenly along the pore walls of the graphene coating from the surface, significantly increasing heat transfer efficiency.

[0023] In other words, using this high-efficiency heating structure can greatly improve heating uniformity, increase heat conduction efficiency by 40%, and by dynamically adjusting the power of the heating rod 300, the temperature difference between the edge and center of the graphite heat-conducting block 200 is no more than 3°C. The overall heating rate is fast, at 25°C per minute, which greatly shortens the pretreatment time. Furthermore, the dynamic power adjustment can adapt to different digestion stages, effectively avoiding sample carbonization.

[0024] In summary, the above embodiments are not limiting embodiments of this utility model. Any modifications or equivalent variations made by those skilled in the art based on the substantive content of this utility model are within the technical scope of this utility model.

Claims

1. A high-efficiency heating structure of a graphite digestion furnace, characterized by comprising: The utility model relates to a heat-conducting block and heating assembly, including: Base, heat-conducting block and heating assembly; The heat-conducting block is provided with a plurality of fixing pieces, and the heat-conducting block is fixed on one side of the base through the fixing pieces, and the heating assembly is partially arranged on the heat-conducting block and is used for being connected with the outside.

2. The high-efficiency heating structure of a graphite digestion furnace according to claim 1, characterized in that: Four fixing holes are formed on one side of the base, and the four fixing holes are equidistantly formed.

3. The high-efficiency heating structure of a graphite digestion furnace according to claim 2, characterized in that: The heat-conducting block is provided with four connecting pieces, and each connecting piece movably corresponds to a fixing hole.

4. The high-efficiency heating structure of a graphite digestion furnace according to claim 3, characterized in that: The fixing piece is a fixed plug, and the number of the fixed plug is four.

5. The high-efficiency heating structure of a graphite digestion furnace according to claim 4, characterized in that: A connecting hole is formed in each connecting piece, and each connecting hole movably communicates with a fixing hole.

6. The high-efficiency heating structure of a graphite digestion furnace according to claim 5, characterized in that: Each fixed plug is partially inserted into a fixing hole through a connecting hole.

7. The high-efficiency heating structure of a graphite digestion furnace according to claim 6, characterized in that: The material of the heat-conducting block is graphite, and a plurality of heat-conducting holes are formed in the heat-conducting block, and the plurality of heat-conducting holes are equidistantly formed.

8. The high-efficiency heating structure of a graphite digestion furnace according to claim 7, characterized in that: Four mounting holes are formed in the side surface of the heat-conducting block, and the heating assembly includes four heating rods, and each heating rod is movably inserted into a mounting hole.

9. The high-efficiency heating structure of a graphite digestion furnace according to claim 8, characterized in that: The surface of each heating rod is coated with a graphene coating, and the graphene coating is used to enhance the heat conduction efficiency.

10. The high-efficiency heating structure of a graphite digestion furnace according to claim 9, characterized in that: A temperature sensor array is arranged on one side of the base, and the temperature sensor array is used to monitor the temperature of the heat-conducting block in real time.

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