On-line purging device for flame monitor of tubular heating furnace

Abstract

The utility model discloses an online purging device for a flame monitor of a tubular heating furnace, and relates to the technical field of flame detection of tubular heating furnaces. The device comprises a flame monitoring device, an air purge device is installed above the flame monitoring device, the side portion of the air purge device is connected with an air source through an air supply pipe, an air outlet of the air purge device corresponds to a detection opening of the tubular heating furnace, a through hole is formed in the axis of the air purge device, and the through hole is communicated with the air supply pipe. And a detection light path of the flame monitoring equipment passes through the through hole in the air purge device and then faces the interior of the tubular heating furnace. A detection light path of the flame monitoring equipment detects the interior of the tubular heating furnace after passing through the through hole and the peephole, and the air purge device blows air into the tubular heating furnace in real time through the peephole to prevent fuel gas, fuel oil dust, water, oil mist and other pollutants in the tubular heating furnace from falling off. And pollution to a measurement light path of flame monitoring equipment is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of flame detection of tubular heating furnaces, in particular to an online purge device for a flame monitor of a tubular heating furnace. Background Art

[0002] During the operation of a tubular heating furnace, it is often necessary to install a flame monitoring device at the bottom of the tubular heating furnace to detect the flame inside the tubular heating furnace to ensure the safe and reliable operation of the tubular heating furnace. During the detection process of the existing flame monitoring equipment, gas, fuel dust, moisture, oil mist and other pollutants inside the tubular heating furnace will fall on the measuring light path of the flame monitoring equipment, causing contamination and blockage of the measuring light path, seriously restricting production efficiency. Utility Model Content

[0003] In view of the above technical problems, the utility model provides an online purge device for a flame monitor of a tubular heating furnace, which is used to solve the problem of serious pollution of the measuring light path of the flame monitor equipment during the detection process of the flame monitor of the tubular heating furnace.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present utility model is as follows:

[0005] An online purge device for a flame monitor of a tubular heating furnace includes a flame monitor device, an air purge is installed above the flame monitor device, the side of the air purge is connected to an air source through an air supply pipe, the air outlet of the air purge corresponds to the detection port of the tubular heating furnace, a through hole is provided on the axis of the air purge, the detection light path of the flame monitor device passes through the through hole on the air purge and faces the inside of the tubular heating furnace, the air purge is a jacketed annular purge, and the air flow outlet adopts an internal tangent nozzle design of 1.5mm×60°. The jacketed annular purge can evenly purge the surface to form an air curtain in the tubular heating furnace to wrap the flame inside it.

[0006] The air blower is connected to the detection port of the tubular heating furnace through an angle adjustment component, and the peep tube is installed above the angle adjustment component.

[0007] The angle adjustment assembly consists of a through-hole universal shaft, a clamping plate, a mounting plate, a gasket and a mounting flange. The lower end of the through-hole universal shaft is connected to the air blower, and the upper end of the through-hole universal shaft is connected to the peep tube. The clamping plate mounting sleeve is arranged at the lower part of the through-hole universal shaft, and the mounting plate sleeve is arranged at the upper part of the through-hole universal shaft. The clamping plate and the mounting plate are connected by fasteners. The gasket is arranged between the mounting plate and the mounting flange, and the mounting flange is connected to the detection port of the tubular heating furnace.

[0008] A stop valve is installed on the air supply pipe.

[0009] An air filter pressure reducing valve is also installed on the air supply pipe.

[0010] The medium in the gas source is compressed air or industrial nitrogen.

[0011] The model of the flame monitoring equipment is XLZJ-102AT integrated ultraviolet flame monitor.

[0012] The utility model also comprises a peep tube, which is arranged just above the angle adjustment component.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The detection light path of the flame monitoring equipment passes through the through hole of the air blower to detect the inside of the tubular heating furnace. The air blower blows air into the tubular heating furnace in real time to prevent the gas, fuel oil dust, moisture, oil mist and other pollutants inside the tubular heating furnace from falling, thereby avoiding contamination of the measurement light path of the flame monitoring equipment;

[0015] 2. The through-hole universal joint allows the flame monitoring device to rotate 360°, with an adjustable angle from 0 to 27° from the vertical axis, enabling the flame monitoring device to accurately aim at the target; the gasket ensures the reliability of the connection and increases the friction between the mounting plate and the mounting flange; the detachable connection between the mounting flange and the air purge is convenient for disassembly and maintenance;

[0016] 3. The jacketed annular purge can purge evenly across the surface, forming an air curtain inside the tubular heating furnace to wrap the flame inside it, isolating the gas, fuel dust, moisture, oil mist and other pollutants inside the tubular heating furnace from falling, thus avoiding contamination of the measuring optical path of the flame monitoring equipment;

[0017] 4. The maximum pressure-bearing capacity of the stop valve is 1.6 MPa, which can be used to cut off the pressure source when repairing or replacing the air filter pressure reducing valve;

[0018] 5. The maximum working pressure of the air filter pressure reducing valve is 1MPa, the filtration accuracy is 5μm, and the pressure adjustment range is 0.1~0.6Mpa. The air filter pressure reducing valve 9 filters particles larger than 5μm in the nitrogen or compressed air source, and reduces the pressure to 0.4~0.5Mpa, and outputs it to the air blower. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] In the picture:

[0021] 1-Detection port, 7-Gas source, 8-Stop valve, 9-Air filter pressure reducing valve, 10-Flame monitoring equipment, 11-Air purge, 12-Through hole universal shaft, 13-Peep tube, 14-Pressure plate, 15-Mounting plate, 16-Gasket, 17-Mounting flange, 18-Tubular heating furnace. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0023] An online purge device for a tubular heating furnace flame monitor includes a flame monitor 10. An air purge 11 is installed above the flame monitor 10. The side of the air purge 11 is connected to an air source 7 via an air supply pipe 2. The air outlet of the air purge corresponds to the detection port 1 of the tubular heating furnace 18. A through hole is provided on the axis of the air purge 11. The detection optical path of the flame monitor 10 passes through the through hole in the air purge 11 and then faces the interior of the tubular heating furnace 18. The detection optical path of the flame monitor 10 passes through the through hole in the air purge 11 and then faces the interior of the tubular heating furnace 18. The air purge 11 blows air into the tubular heating furnace 18 in real time to prevent gas, fuel oil dust, moisture, oil mist and other contaminants inside the tubular heating furnace 18 from falling, thereby avoiding contamination of the measurement optical path of the flame monitor 10.

[0024] The air blower 11 is connected to the detection port 1 of the tubular heating furnace 18 through an angle adjustment component, and the peep tube 13 is installed above the angle adjustment component.

[0025] The angle adjustment assembly consists of a through-hole universal shaft 12, a clamping plate 14, a mounting plate 15, a gasket 16 and a mounting flange 17. The lower end of the through-hole universal shaft 12 is connected to the air blower 11, and the upper end of the through-hole universal shaft 12 is connected to the peep tube 13. The clamping plate 14 is mounted on the lower part of the through-hole universal shaft 12, and the mounting plate 15 is mounted on the upper part of the through-hole universal shaft 12. The clamping plate 14 and the mounting plate 15 are connected by fasteners. The gasket 16 is arranged between the mounting plate 15 and the mounting flange 17, and the mounting flange 17 is connected to the detection port 1 of the tubular heating furnace 18. The through-hole universal joint 12 allows the flame monitoring device 10 to rotate 360°, and the angle from the vertical axis can be adjusted from 0 to 27°, so that the flame monitoring device 10 can accurately aim at the target; the gasket 16 ensures the reliability of the connection and increases the friction between the mounting plate 15 and the mounting flange 17; the mounting flange 17 is detachably connected to the air purge 11, making disassembly and maintenance convenient.

[0026] The air purge 11 is a jacketed annular purge with a 1.5mm x 60° internal tangential nozzle design. This provides uniform, surface-level airflow, forming an air curtain within the tubular heating furnace 18 that envelops the flame. This prevents contaminants such as gas, fuel oil, dust, moisture, and oil mist from falling into the tubular heating furnace 18, preventing contamination of the flame monitoring device 10's measurement optical path.

[0027] A stop valve 8 is installed on the air supply pipe 2. The maximum pressure of the source inlet stop valve 8 is 1.6 MPa, which can be used to cut off the pressure source when repairing or replacing the air filter pressure reducing valve 9.

[0028] An air filter pressure reducing valve 9 is also installed on the air supply pipe 2. The maximum working pressure of the air filter pressure reducing valve 9 is 1 MPa, the filtration accuracy is 5 μm, and the pressure adjustment range is 0.1-0.6 MPa. The air filter pressure reducing valve 99 filters particles larger than 5 μm from the nitrogen or compressed air source 7 and reduces the pressure to 0.4-0.5 MPa, which is then output to the air purge device 11.

[0029] The medium in the gas source 7 is compressed air or industrial nitrogen.

[0030] The flame monitoring device 10 is an XLZJ-102AT integrated ultraviolet flame monitor. The flame monitoring device 10 is only sensitive to ultraviolet rays generated during fuel combustion and has no reaction to light and furnace high temperature radiation. It has strong anti-interference ability and high sensitivity.

[0031] When using:

[0032] Open the stop valve 8, and the air filter pressure reducing valve 9 filters the particles larger than 5μm in the nitrogen or compressed air source 7, and reduces the pressure to 0.4-0.5Mpa, and outputs it to the air blower 11. The jacketed annular blower can blow evenly on the surface to form an air curtain in the tubular heating furnace 18, wrapping the flame inside it, and isolating the gas, fuel dust, moisture, oil mist and other pollutants inside the tubular heating furnace 18 from falling. The flame monitoring equipment 10 adjusts the angle from 0 to 27° from the vertical axis according to the actual needs on site under the action of the angle adjustment component according to the situation inside the tubular heating furnace 18. The detection light path of the flame monitoring equipment 10 passes through the through hole and the peephole to detect the inside of the tubular heating furnace 18.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An online purge device for a flame monitor of a tubular heating furnace, characterized by: The invention comprises a flame monitoring device (10), an air purge (11) is installed above the flame monitoring device (10), the side of the air purge (11) is connected to an air source (7) through an air supply pipe (2), the air outlet of the air purge corresponds to the detection port (1) of the tubular heating furnace (18), a through hole is provided on the axis of the air purge (11), the detection light path of the flame monitoring device (10) passes through the through hole on the air purge (11) and faces the inside of the tubular heating furnace (18), the air purge (11) is a jacketed annular purge, the air flow outlet adopts an inner tangent nozzle 1.5mm×60° design, the jacketed annular purge can evenly purge the surface, form an air curtain in the tubular heating furnace (18), and wrap the flame inside it.

2. The online purge device for a flame monitor of a tubular heating furnace according to claim 1, characterized in that: The air blower (11) is connected to the detection port (1) of the tubular heating furnace (18) via an angle adjustment component.

3. The online purge device for a flame monitor of a tubular heating furnace according to claim 2, characterized in that: The angle adjustment assembly consists of a through-hole universal shaft (12), a clamping plate (14), a mounting plate (15), a gasket (16) and a mounting flange (17). The lower end of the through-hole universal shaft (12) is connected to the air purge (11), and the upper end of the through-hole universal shaft (12) is connected to the peep tube (13). The clamping plate (14) is mounted on the lower part of the through-hole universal shaft (12), and the mounting plate (15) is mounted on the upper part of the through-hole universal shaft (12). The clamping plate (14) and the mounting plate (15) are connected by fasteners. The gasket (16) is arranged between the mounting plate (15) and the mounting flange (17), and the mounting flange (17) is connected to the detection port (1) of the tubular heating furnace (18).

4. The online purge device for a flame monitor of a tubular heating furnace according to claim 3, characterized in that: A stop valve (8) is installed on the air supply pipe (2).

5. The online purge device for a flame monitor of a tubular heating furnace according to claim 4, characterized in that: An air filter pressure reducing valve (9) is also installed on the air supply pipe (2).

6. The online purge device for a flame monitor of a tubular heating furnace according to claim 5, characterized in that: The medium in the gas source (7) is compressed air or industrial nitrogen.

7. The online purge device for a flame monitor of a tubular heating furnace according to claim 6, characterized in that: The model of the flame monitoring device (10) is an XLZJ-102AT integrated ultraviolet flame monitor.

8. The online purge device for a flame monitor of a tubular heating furnace according to claim 7, characterized in that: It also includes a peep tube (13), which is arranged directly above the angle adjustment component.

Images