CN216057535U

CN216057535U - Infrared heater for gas

Info

Publication number: CN216057535U
Application number: CN202122702871.6U
Authority: CN
Inventors: 程星; 肖勃雷
Original assignee: Sunmonde Electric Light Source Technology Shanghai Co ltd
Current assignee: Sunmonde Electric Light Source Technology Shanghai Co ltd
Priority date: 2021-11-07
Filing date: 2021-11-07
Publication date: 2022-03-15
Anticipated expiration: 2031-11-07

Abstract

An infrared heater for gas in the technical field of infrared heating comprises a quartz main pipe, a metal gas source pipe power line, a heating wire, a temperature thermocouple, an alumina coating, an observation window, a first quartz branch pipe and a second quartz branch pipe, wherein the heating wire is arranged in the middle of the quartz main pipe, two ends of the heating wire are respectively connected with one end of each of the two power lines, the two first quartz branch pipes are arranged on the quartz main pipe and are close to two ends of the heating wire, and the other ends of the two power lines respectively extend out of the two first quartz branch pipes; the two second quartz branch pipes are arranged on the quartz main pipe; the two temperature thermocouples are respectively arranged in the two second quartz branch pipes; the alumina coating is arranged on the outer wall of the quartz main pipe at the position of the heating wire. The infrared absorption spectrum matching device is reasonable in design, simple in structure, relatively low in cost and high in safety, and can match infrared absorption spectra for the temperature rise of specific gas according to the molecular dynamics principle.

Description

Infrared heater for gas

Technical Field

The utility model relates to an infrared heater in the technical field of heating, in particular to an infrared heater with a temperature measuring thermocouple and an alumina coating for gas.

Background

The gas is heated up, and in scientific research or industrial departments, an indirect heating mode is adopted conventionally. The temperature of the gas is raised by radiation and conduction through the inner wall of the gas source pipeline. However, in this way, the weaknesses are: firstly, raising the temperature to be generally less than 300 ℃; secondly, the heat exchange efficiency is low and the temperature rise is slow; waste heat is more, requirements on devices are more, and manufacturing cost is high; and fourthly, the temperature of the gas is difficult to accurately control, and the uniformity of the heated gas is achieved by a specially designed hot runner.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the infrared heater for the gas, integrates conduction, radiation and convection, greatly improves the heat exchange efficiency compared with the traditional indirect heating mode, has less waste heat, is easy to control by an electric control closed loop accurately, is easy to combine to form a module, has relatively low cost and high safety, can realize infrared absorption spectrum matching for the temperature rise of specific gas according to the molecular dynamics principle, and can heat the specific gas such as methane (CH4) to 1000 ℃ within 3 min. The utility model has better effect on researching the high-temperature combustion or explosion principle of various gases by research or industrial departments. When the temperature of various gases is raised to a certain index respectively, and the gases are mixed to carry out a reaction experiment, the utility model can also achieve the aim through combination simply.

The utility model is realized by the following technical scheme, the quartz temperature measuring device comprises a quartz main pipe, metal gas source pipe power lines, heating wires, a temperature measuring thermocouple, an alumina coating, an observation window, first quartz branch pipes and second quartz branch pipes, wherein the two metal gas source pipes are respectively arranged at two ends of the quartz main pipe; the two second quartz branch pipes are arranged on the quartz main pipe and are respectively positioned at the outer sides of the two first quartz branch pipes; the two temperature thermocouples are respectively arranged in the two second quartz branch pipes; the aluminum oxide coating is arranged on the outer wall of the quartz main pipe at the position of the heating wire; the observation window is arranged in the middle of the quartz main pipe.

Further, in the present invention, the heating wire is in a spiral shape and is subjected to a high temperature pre-sintering process at 1200 ℃.

Furthermore, in the utility model, the aluminum oxide coating is an aluminum oxide coating, and the reflectivity of the full infrared spectrum band is more than 85%.

Furthermore, in the utility model, the power line and the first quartz branch pipe, the temperature thermocouple and the second quartz branch pipe, and the quartz main pipe and the metal gas source pipe are reliably and hermetically connected.

Furthermore, in the utility model, the first quartz branch pipe, the second quartz branch pipe and the quartz main pipe are all fused and connected.

Compared with the prior art, the utility model has the following beneficial effects: compared with the traditional indirect heating mode, the utility model has the advantages of greatly improved heat exchange efficiency, less waste heat, easy electric control closed loop accurate control, easy combination to form a module, relatively low cost and high safety, can realize infrared absorption spectrum matching for the temperature rise of specific gas according to the molecular dynamics principle, and can heat the specific gas such as methane (CH4) to 1000 ℃ within 3 min.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the right side of FIG. 1;

FIG. 3 is an enlarged view of a portion of the middle of FIG. 1;

the device comprises a quartz main pipe 1, a metal gas source pipe 2, a metal gas source pipe 3, a power line 4, a heating wire 5, a temperature thermocouple 6, an alumina coating 7, an observation window 8, a first quartz branch pipe 9 and a second quartz branch pipe.

Detailed Description

The following embodiments of the present invention are described in detail with reference to the accompanying drawings, and the embodiments and specific operations of the embodiments are provided on the premise of the technical solution of the present invention, but the scope of the present invention is not limited to the following embodiments.

Examples

As shown in the figure 1, the utility model comprises a quartz main pipe 1, metal gas source pipes 2, power supply wires 3, heating wires 4, temperature measuring thermocouples 5, an alumina coating 6, an observation window 7, first quartz branch pipes 8 and second quartz branch pipes 9, wherein the two metal gas source pipes 2 are respectively arranged at two ends of the quartz main pipe 1, the heating wires 4 are arranged at the middle part of the quartz main pipe 1, two ends of the heating wires 4 are respectively connected with one end of each of the two power supply wires 3, the two first quartz branch pipes 8 are arranged on the quartz main pipe 1 and are close to two ends of the heating wires 4, and the other ends of the two power supply wires 3 respectively extend out of the two first quartz branch pipes 8; the two second quartz branch pipes 9 are both arranged on the quartz main pipe 1 and are respectively positioned at the outer sides of the two first quartz branch pipes 8; the two temperature thermocouples 5 are respectively arranged in the two second quartz branch pipes 9; the alumina coating 6 is arranged on the outer wall of the quartz main pipe 1 at the position of the heating wire 4; the observation window 7 is arranged in the middle of the quartz main tube 1.

In the utility model, the spiral special heating wire 4 is pre-sintered at high temperature (1200 ℃), so that the gravity and creep deformation under high-temperature working conditions can be effectively prevented, and the spiral special heating wire can be used horizontally, vertically or obliquely. The surface of the heating section of the quartz main tube 1 is coated with an alumina coating in 360 degrees (the reflectivity of the full infrared spectrum section is more than 85 percent), and the alumina coating does not generate chemical reaction with other gases at the high temperature of below 1200 ℃, can effectively prevent energy from penetrating through the wall of the quartz tube and overflowing heat radiation, prevent energy dissipation and improve the physical strength of the heating section of the main quartz tube body. The metal gas source pipes 2 on two sides of the quartz main pipe 1 are in and out and are reliably and hermetically connected with the quartz main pipe 1. The power lines 3 on the two sides are reliably and hermetically connected with the quartz main pipe 1 through the first quartz branch pipe 8 of the thin quartz pipe, and safety and good insulation are ensured. The temperature thermocouples 5 at two sides detect the real-time temperature of the inlet and outlet of the hot gas, are reliably and hermetically connected with the quartz main pipe 1 through the thin second quartz branch pipes 9, ensure safety and good insulation, and easily realize closed-loop electric control of the output power of the heating wire 4 and the temperature rise point of the required gas through the analog quantity output of the temperature signal of the thermocouples. An observation window 7 with the diameter of 5-8 mm is reserved in the middle of the alumina protective coating of the heating section of the quartz main pipe 1, so that the temperature of the spiral special heating wire 4 under different power output conditions can be observed in real time by using a short-wave thermal infrared imager, and the infrared radiation spectrum of the heating wire can be calculated to match the energy absorption of the required heating gas. The first quartz branch pipe 8, the second quartz branch pipe 9 and the quartz main pipe 1 are all connected through fusing, are strictly sealed, and are pressure-resistant and high-temperature-resistant.

The foregoing describes a specific implementation of the present invention. It is to be understood that the present invention is not limited to the specific operating modes described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the utility model.

Claims

1. An infrared heater for gas comprises a quartz main pipe (1) and metal gas source pipes (2), wherein the two metal gas source pipes (2) are respectively arranged at two ends of the quartz main pipe (1), and the infrared heater is characterized by further comprising a power line (3), a heating wire (4), a temperature thermocouple (5), an alumina coating (6), an observation window (7), first quartz branch pipes (8) and second quartz branch pipes (9), wherein the heating wire (4) is arranged in the middle of the quartz main pipe (1), two ends of the heating wire (4) are respectively connected with one end of each of the two power lines (3), the two first main pipe (8) are arranged on the quartz main pipe (1) and are close to two ends of the heating wire (4), and the other ends of the two power lines (3) respectively extend out of the two first quartz branch pipes (8); the two second quartz branch pipes (9) are arranged on the quartz main pipe (1) and are respectively positioned at the outer sides of the two first quartz branch pipes (8); the two temperature thermocouples (5) are respectively arranged in the two second quartz branch pipes (9); the alumina coating (6) is arranged on the outer wall of the quartz main pipe (1) at the position of the heating wire (4); the observation window (7) is arranged in the middle of the quartz main pipe (1).

2. Infrared heater for gases according to claim 1, characterised in that the heating wire (4) is spiral shaped and subjected to a high temperature pre-sintering treatment at 1200 ℃.

3. Infrared heater for gases according to claim 1, characterised in that the alumina coating (6) is an alumina coating with a reflectance of > 85% in the full infrared spectral range.

4. The infrared heater for gases according to claim 1, characterized in that the quartz main tube (1) and the metal gas source tube (2) are in reliable sealing connection between the power line (3) and the first quartz branch tube (8), between the thermo-couple (5) and the second quartz branch tube (9).

5. Infrared heater for gases according to claim 1, characterised in that the fused connection is provided between the first quartz branch tube (8), the second quartz branch tube (9) and the main quartz tube (1).