Regional temperature control system for furnace body of elemental analyzer

Abstract

The utility model discloses a furnace body regional temperature control system of an element analyzer, which comprises a furnace body, a hearth arranged in the middle of the upper end of the furnace body, a ceramic tube arranged in the hearth, and a temperature control mechanism, the temperature control mechanism comprises an oxidation zone relay, a reduction zone relay and a two-way temperature controller, the oxidation zone relay is arranged on the upper side of the right end of the furnace body, the oxidation zone relay is arranged on the lower side of the right end of the furnace body, the two-way temperature controller is arranged at the right end of the furnace body, and the input end of the two-way temperature controller is electrically connected with an external power supply; according to the regional temperature control system for the furnace body of the elemental analyzer, the temperature of the oxidation zone and the temperature of the reduction zone can be independently controlled, so that the sulfur element can be completely oxidized in the oxidation zone, the problem that copper is molten in the reduction zone is solved, and the production efficiency is improved. The reaction efficiency of the sulfur element is further improved.

Description

Technical Field

[0001] This utility model relates to the field of element determination technology, specifically to a zoned temperature control system for an elemental analyzer furnace. Background Technology

[0002] An elemental analyzer is an instrument used to determine the content of various elements in a sample. It is widely used in materials science, geology, environmental science, chemical analysis and other fields. When testing samples with an elemental analyzer, the sample is first oxidized in the oxidation zone of the reaction tube and then reduced in the reduction zone. The furnace body of the elemental analyzer is generally heated by a single heating wire and controlled by a set temperature. The most commonly used reducing agent in elemental analyzers is rough-surfaced linear copper. Compared with other shapes, rough-surfaced linear copper has a larger specific surface area, resulting in a more complete reaction. However, when testing the sulfur content of a sample, in order to completely oxidize the sulfur element into gaseous oxides, the temperature of the reaction furnace needs to be set higher, generally 1050℃-1200℃. However, the melting temperature of copper is 1083℃. Therefore, in the sulfur-containing mode of the elemental analyzer, copper melting will occur, leading to reduced reaction efficiency, fewer uses of reducing agent, and damage to the reaction tube. To address this, we propose a zoned temperature control system for the elemental analyzer furnace body. Utility Model Content

[0003] The technical problem this invention aims to solve is to overcome existing defects and provide a zoned temperature control system for an elemental analyzer furnace. By coordinating oxidation zone relays, reduction zone relays, and dual-channel temperature controllers, the temperatures of the oxidation and reduction zones can be controlled independently. This ensures that sulfur is completely oxidized in the oxidation zone and also solves the problem of copper melting in the reduction zone, reducing safety hazards caused by copper melting and further improving the reaction efficiency of sulfur. This effectively solves the problems in the background technology.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a zoned temperature control system for an elemental analyzer furnace, comprising a furnace body, a furnace chamber located in the middle of the upper end of the furnace body, a ceramic tube located inside the furnace chamber, and a temperature control mechanism;

[0005] Temperature control mechanism: It includes an oxidation zone relay, a reduction zone relay, and a dual-channel temperature controller. The oxidation zone relay is located on the upper right side of the furnace body, and the reduction zone relay is located on the lower right side of the furnace body. The dual-channel temperature controller is located on the right side of the furnace body. The input terminal of the dual-channel temperature controller is electrically connected to an external power supply. The input terminals of both the oxidation zone relay and the reduction zone relay are electrically connected to the output terminal of the dual-channel temperature controller. Through the coordinated arrangement of the oxidation zone relay, the reduction zone relay, and the dual-channel temperature controller, the temperatures of the oxidation zone and the reduction zone can be controlled independently. This ensures that sulfur is completely oxidized in the oxidation zone and also solves the problem of copper melting in the reduction zone, reducing the safety hazards caused by copper melting and further improving the reaction efficiency of sulfur.

[0006] Furthermore, the temperature control mechanism also includes an oxidation zone heating wire, which is disposed on the upper side of the outer arc surface of the ceramic tube. The input end of the oxidation zone heating wire is electrically connected to the output end of the oxidation zone relay, enabling it to heat the oxidation zone.

[0007] Furthermore, the temperature control mechanism also includes a reduction zone heating wire, which is disposed on the lower side of the outer arc surface of the ceramic tube. The input end of the reduction zone heating wire is electrically connected to the output end of the reduction zone relay, enabling it to heat the reduction zone.

[0008] Furthermore, quartz wool is provided between the outer arc surface of the ceramic tube, the outer arc surface of the heating wire in the oxidation zone, the outer arc surface of the heating wire in the reduction zone and the inner wall of the furnace, which can effectively prevent heat conduction and reduce heat loss.

[0009] Furthermore, an oxidation zone thermocouple is installed in the clearance groove opened on the front side of the upper end of the furnace body. The probe at the lower end of the oxidation zone thermocouple is in contact with the inner arc surface of the furnace chamber. The oxidation zone thermocouple is bidirectionally electrically connected to the dual-path temperature controller and measures the temperature of the oxidation zone in real time.

[0010] Furthermore, a reduction zone thermocouple is installed in the mounting groove opened on the front side of the lower end of the furnace body. The probe installed on the upper end of the reduction zone thermocouple is in contact with the inner arc surface of the furnace chamber. The reduction zone thermocouple is bidirectionally electrically connected to the dual-path temperature controller. The reduction zone thermocouple measures the temperature of the reduction zone in real time.

[0011] Furthermore, the ceramic tube has a height of 250mm-300mm, an inner diameter of 18mm-24mm, and a wall thickness of 1.5mm-2.5mm. The ceramic tube is used to fix the heating wires in the oxidation zone and the reduction zone, preventing the heating wires in the oxidation zone and the reduction zone from deforming and falling off.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the elemental analyzer furnace body zoned temperature control system has the following advantages:

[0013] By using a combination of oxidation zone relays, reduction zone relays, and dual-channel temperature controllers, the temperatures of the oxidation and reduction zones can be controlled independently. This ensures that sulfur is completely oxidized in the oxidation zone and also solves the problem of copper melting in the reduction zone, reducing safety hazards caused by copper melting and further improving the reaction efficiency of sulfur. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the left-side cross-sectional structure of the present invention;

[0016] Figure 3 This is a schematic diagram of the temperature control mechanism of this utility model.

[0017] In the diagram: 1 Furnace body, 2 Ceramic tube, 3 Temperature control mechanism, 31 Oxidation zone heating wire, 32 Reduction zone heating wire, 33 Oxidation zone relay, 34 Reduction zone relay, 35 Dual-channel temperature controller, 4 Oxidation zone thermocouple, 5 Reduction zone thermocouple, 6 Furnace chamber, 7 Quartz wool. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1-3 This embodiment provides a technical solution: a zoned temperature control system for an elemental analyzer furnace, including a furnace body 1, a furnace chamber 6 located in the middle of the upper end of the furnace body 1, a ceramic tube 2 located inside the furnace chamber 6, the furnace chamber 2 having a length of 180mm-250mm, a width of 180mm-250mm, and a height of 250mm-300mm, and being made of pressed quartz wool, which has the characteristics of being lightweight and having good heat insulation, and also includes a temperature control mechanism 3;

[0020] Temperature control mechanism 3 includes an oxidation zone relay 33, a reduction zone relay 34, and a dual-channel temperature controller 35. The oxidation zone relay 33 is located on the upper right side of the furnace body 1, and the reduction zone relay 34 is located on the lower right side of the furnace body 1. The dual-channel temperature controller 35 is located on the right side of the furnace body 1. The input terminal of the dual-channel temperature controller 35 is electrically connected to an external power supply. The input terminals of both the oxidation zone relay 33 and the reduction zone relay 34 are electrically connected to the output terminal of the dual-channel temperature controller 35. The temperature control mechanism 3 also includes an oxidation zone... The heating wire 31 for the oxidation zone is located on the upper side of the outer arc surface of the ceramic tube 2. The input end of the heating wire 31 is electrically connected to the output end of the oxidation zone relay 33. The temperature control mechanism 3 also includes a heating wire 32 for the reduction zone, which is located on the lower side of the outer arc surface of the ceramic tube 2. The input end of the heating wire 32 is electrically connected to the output end of the reduction zone relay 34. Both the heating wire 31 and the heating wire 32 for the reduction zone are alloy heating wires with a diameter of 0.8-1.5 mm. The coil is tightly spirally wound around the upper part of the ceramic tube 2 with a pitch of 3mm-5mm. The dual-channel temperature controller 35 has two channels, each controlling a set temperature: 1000℃-1200℃ for the oxidation zone and 650℃-850℃ for the reduction zone. The dual-channel temperature controller 35 sends control signals to the oxidation zone relay 33 and the reduction zone relay 34, employing PID control. PID stands for Proportional, Integral, and Derivative, and these three control methods work together to achieve precise adjustment of the system output. Through the coordinated setting of the oxidation zone relay 33, the reduction zone relay 34, and the dual-channel temperature controller 35, the temperatures of the oxidation and reduction zones can be controlled independently. This ensures that sulfur is completely oxidized in the oxidation zone and also solves the problem of copper melting in the reduction zone, reducing safety hazards caused by copper melting and further improving the reaction efficiency of sulfur.

[0021] Among them, quartz wool 7 is provided between the outer arc surface of ceramic tube 2, the outer arc surface of oxidation zone heating wire 31, the outer arc surface of reduction zone heating wire 32 and the inner wall of furnace chamber 6. Quartz wool 7 is a material with high heat insulation performance. It contains a large number of tiny pores and fiber structures, which can effectively prevent heat conduction and reduce heat loss.

[0022] Oxidation zone thermocouple 4 is installed in the clearance groove at the front of the upper end of the furnace body 1. The probe at the lower end of the oxidation zone thermocouple 4 is in contact with the inner arc surface of the furnace chamber 6. The oxidation zone thermocouple 4 is bidirectionally electrically connected to the dual-path temperature controller 35. The oxidation zone thermocouple 4 measures the temperature of the oxidation zone in real time and transmits the measured data to the dual-path temperature controller 35.

[0023] Specifically: A reduction zone thermocouple 5 is installed in the mounting groove at the front of the lower end of the furnace body 1. The probe at the upper end of the reduction zone thermocouple 5 is in contact with the inner arc surface of the furnace chamber 6. The reduction zone thermocouple 5 is bidirectionally electrically connected to the dual-path temperature controller 35. The reduction zone thermocouple 5 measures the temperature of the reduction zone in real time and transmits the measured data to the dual-path temperature controller 35.

[0024] Among them, the height of ceramic tube 2 is 250mm-300mm, the inner diameter is 18mm-24mm, and the wall thickness is 1.5mm-2.5mm. Ceramic tube 2 is made of ceramic material. Ceramic tube 2 is used to fix the heating wire 31 in the oxidation zone and the heating wire 32 in the reduction zone to prevent the heating wire 31 in the oxidation zone and the heating wire 32 in the reduction zone from deforming and falling off.

[0025] The working principle of the elemental analyzer furnace body zone temperature control system provided by this utility model is as follows: When using the elemental analyzer furnace body zone temperature control system, the sulfur element sample is first poured into the interior of the ceramic tube 2. The oxidation zone thermocouple 4 and the reduction zone thermocouple 5 measure the temperature of the oxidation zone and the reduction zone in real time. Then, the oxidation zone thermocouple 4 and the reduction zone thermocouple 5 transmit the measured data to the dual-channel temperature controller 35. After that, the temperature of the oxidation zone and the reduction zone are set on the dual-channel temperature controller 35 respectively. The dual-channel temperature controller 35 will automatically control the opening and closing time and switching frequency of the oxidation zone relay 33 and the reduction zone relay 34 respectively according to the temperature measured by the oxidation zone thermocouple 4 and the reduction zone thermocouple 5, thereby controlling the heating time of the oxidation zone heating wire 31 and the reduction zone heating wire 32, and finally realizing the temperature control of the oxidation zone and the heating zone respectively. PID is an abbreviation for "Proportional, Integral, Derivative". These three control methods work together to achieve precise adjustment of the system output.

[0026] It is worth noting that the dual-channel temperature controller 35 disclosed in the above embodiments can be SZR011, the oxidation zone relay 33 and the reduction zone relay 34 can be CKRD2420, the oxidation zone thermocouple 4 and the reduction zone thermocouple 5 can be WRP-431, and the dual-channel temperature controller 35 controls the operation of the oxidation zone heating wire 31, the reduction zone heating wire 32, the oxidation zone relay 33, the reduction zone relay 34, the oxidation zone thermocouple 4 and the reduction zone thermocouple 5 using methods commonly used in the prior art.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A kind of element analysis instrument furnace body subarea temperature control system, including furnace body (1), the middle part of the upper end of furnace body (1) is provided with hearth (6), the inside of hearth (6) is provided with ceramic tube (2), it is characterized by: It also includes a temperature control mechanism (3); Temperature control mechanism (3): It includes oxidation zone relay (33), reduction zone relay (34) and dual-channel temperature controller (35). The oxidation zone relay (33) is located on the upper side of the right end of the furnace body (1), and the oxidation zone relay (33) is located on the lower side of the right end of the furnace body (1). The dual-channel temperature controller (35) is located on the right end of the furnace body (1). The input terminal of the dual-channel temperature controller (35) is electrically connected to an external power supply. The input terminals of the oxidation zone relay (33) and the reduction zone relay (34) are both electrically connected to the output terminal of the dual-channel temperature controller (35).

2. The furnace zoned temperature control system for elemental analyzer according to claim 1, wherein: The temperature control mechanism (3) also includes an oxidation zone heating wire (31), which is located on the upper side of the outer arc surface of the ceramic tube (2). The input end of the oxidation zone heating wire (31) is electrically connected to the output end of the oxidation zone relay (33).

3. A furnace zoned temperature control system for an elemental analyzer as defined in claim 2, wherein: The temperature control mechanism (3) also includes a reduction zone heating wire (32), which is located on the lower side of the outer arc surface of the ceramic tube (2). The input end of the reduction zone heating wire (32) is electrically connected to the output end of the reduction zone relay (34).

4. The elemental analyzer furnace body zoned temperature control system according to claim 3, characterized in that: Quartz wool (7) is provided between the outer arc surface of the ceramic tube (2), the outer arc surface of the oxidation zone heating wire (31), the outer arc surface of the reduction zone heating wire (32) and the inner wall of the furnace (6).

5. The furnace zoned temperature control system for elemental analyzer of claim 1, wherein: An oxidation zone thermocouple (4) is installed in the clearance groove on the front side of the upper end of the furnace body (1). The probe at the lower end of the oxidation zone thermocouple (4) contacts the inner arc surface of the furnace chamber (6). The oxidation zone thermocouple (4) is bidirectionally electrically connected to the dual-path temperature controller (35).

6. The furnace zoned temperature control system for elemental analyzer according to claim 1, wherein: A reduction zone thermocouple (5) is installed in the mounting groove at the front of the lower end of the furnace body (1). The probe at the upper end of the reduction zone thermocouple (5) contacts the inner arc surface of the furnace chamber (6). The reduction zone thermocouple (5) is bidirectionally electrically connected to the dual-path temperature controller (35).

7. The furnace zoned temperature control system for elemental analyzer according to claim 1, wherein: The ceramic tube (2) has a height of 250mm-300mm, an inner diameter of 18mm-24mm, and a wall thickness of 1.5mm-2.5mm.

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