Low-nitrogen combustion NOX content monitoring system for gas heating furnace
By designing a low-nitrogen combustion NOX content monitoring system for gas heating furnaces, using sensors, microprocessors and automatic adjustment structures, real-time monitoring and automatic adjustment of NOX content is achieved, and the existing low-nitrogen heating furnaces cannot monitor and adjust NOX in real time. The content problem improves the practicality of the heating furnace.
Patent Information
- Application Number
- CN202420603283.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-03-27
AI Technical Summary
The existing low-nitrogen heating furnaces lack real-time monitoring of the NOX content generated by low-nitrogen combustion, and cannot truly understand the NOX content generated at different temperatures. When the NOX content instantly exceeds the standard, it cannot be timely reduced through automatic control and adjustment of the combustion state of the burner.
A low-nitrogen combustion NOX content monitoring system for gas heating furnaces is designed, including nitrogen oxide sensors, flue gas analysis chambers, wireless transmission modules, data acquisition and display devices and flow regulation structures. The sensor detects the NOX content in the flue gas, the microprocessor processes the data and transmits it through the wireless module, and the PLC controller and the flow adjustment structure cooperate to automatically adjust the oxygen inlet volume of the gas intake pipe to reduce the NOX content.
Real-time monitoring and automatic adjustment of NOX content in flue gas is achieved, effectively suppressing NOX content and improving the practicality of the heating furnace.
Smart Images
Figure CN222439470U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of nitrogen emission monitoring of heating furnaces, in particular to a low-nitrogen combustion NOX content monitoring system for gas heating furnaces. Background Art
[0002] In recent years, the government has attached more and more importance to energy reduction and emission reduction. The flue gas NOX emissions of the heating furnaces in refineries are treated with low-nitrogen emissions. However, the existing low-nitrogen heating furnaces lack real-time monitoring of the NOX content generated by low-nitrogen combustion, and cannot truly understand the NOX content generated at different temperatures. When the NOX content exceeds the standard instantaneously, it is impossible to adjust the burner combustion state through automatic control in time to reduce the NOX content. For this reason, we proposed a NOX content monitoring system for low-nitrogen combustion of gas heating furnaces. Utility Model Content
[0003] In order to solve the above problems, the utility model provides a gas heating furnace low nitrogen combustion NOX content monitoring system. The utility model solves the problem that the existing low nitrogen heating furnace lacks real-time monitoring of the NOX content generated by low nitrogen combustion, cannot truly understand the NOX content generated at different temperatures, and cannot timely adjust the burner combustion state through automatic control to reduce the NOX content when the NOX content exceeds the standard instantly.
[0004] A low-nitrogen combustion NOx content monitoring system for a gas heating furnace in the utility model comprises a heating furnace body and a data acquisition and display device, a smoke exhaust pipe is provided in the middle part above the heating furnace body, a mounting frame is provided on one side of the smoke exhaust pipe, a smoke analysis box is fixedly installed on the mounting frame, a nitrogen oxide sensor connected to the smoke analysis box is installed in the smoke exhaust pipe, a first microprocessor is provided in the smoke analysis box, a wireless transmitting module is provided on the first microprocessor, a second microprocessor is provided in the data acquisition and display device, a wireless receiving module and a PLC controller matching the wireless transmitting module are provided on the second microprocessor, a burner is provided on one side of the heating furnace body, a gas inlet pipe is provided on the side of the burner away from the heating furnace body, and a flow regulating structure is provided on the gas inlet pipe.
[0005] In the above scheme, the flow regulating structure includes a shell, a motor is arranged in the shell, a first bevel gear is arranged on the motor, a shaft rod is inserted into the shell on the side away from the motor, a second bevel gear meshing with the first bevel gear is arranged on the shaft rod, and the lower end of the shaft rod passes through the gas inlet pipe and is fixedly connected to the valve plate.
[0006] In the above solution, the data acquisition and display device is connected to the motor wires through a wire.
[0007] In the above solution, the data acquisition and display device is provided with a display screen.
[0008] In the above solution, the flue gas analysis box is provided with a box door.
[0009] The advantages and beneficial effects of the utility model are as follows: the utility model provides a low-nitrogen combustion NOX content monitoring system for a gas heating furnace, the nitrogen oxide sensor can detect the content of nitrogen oxides in the flue gas, the first microprocessor can process the relevant data detected by the nitrogen oxide sensor, and transmit it remotely through the wireless transmission module, the wireless receiving module on the second microprocessor can receive the data transmitted by the wireless transmission module, and process the relevant data through the second microprocessor, when the nitrogen oxide sensor detects that the nitrogen oxide content in the flue gas exceeds the set value, the second microprocessor controls the PLC controller, and controls the flow regulating structure through the PLC controller, so as to achieve the purpose of regulating the oxygen intake of the gas intake pipe. This monitoring system can monitor the nitrogen oxide content in the flue gas in real time, can automatically adjust the oxygen content inside the heating furnace, suppress the content of nitrogen oxides, and improve the practicality of the heating furnace. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0011] Figure 1 It is a schematic diagram of the structure of the utility model;
[0012] Figure 2 It is a cross-sectional view of the utility model;
[0013] Figure 3 This is a schematic diagram of the structure of part A of the utility model;
[0014] Figure 4 It is a schematic diagram of the module structure of the utility model.
[0015] In the figure: 1, heating furnace body 2, smoke exhaust pipe 3, mounting bracket 4, flue gas analysis box 5, nitrogen oxide sensor 6, first microprocessor 7, wireless transmission module 8, data acquisition and display device 9, second microprocessor 10, wireless receiving module 11, PLC controller 12, burner 13, gas inlet pipe 14, flow regulating structure 141, shell 142, motor 143, first bevel gear 144, shaft 145, second bevel gear 146, valve plate 15, wire 16, display screen 17, box door. DETAILED DESCRIPTION
[0016] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.
[0017] like Figure 1-4 As shown, the utility model is a low-nitrogen combustion NOX content monitoring system for a gas heating furnace, comprising a heating furnace body 1 and a data acquisition and display device 8, wherein a smoke exhaust pipe 2 is provided in the middle of the upper part of the heating furnace body 1, a mounting frame 3 is provided on one side of the smoke exhaust pipe 2, a flue gas analysis box 4 is fixedly installed on the mounting frame 3, a nitrogen oxide sensor 5 connected to the flue gas analysis box 4 is installed in the smoke exhaust pipe 2, the nitrogen oxide sensor 5 can detect the content of nitrogen oxides in the flue gas, a first microprocessor 6 is provided in the flue gas analysis box 4, a wireless transmission module 7 is provided on the first microprocessor 6, the first microprocessor 6 can process the relevant data detected by the nitrogen oxide sensor 5, and remotely transmit it through the wireless transmission module 7, the data acquisition and display device 8 is provided. A second microprocessor 9 is provided in the device 8, and a wireless receiving module 10 and a PLC controller 11 matching the wireless transmitting module 7 are provided on the second microprocessor 9. The wireless receiving module 10 on the second microprocessor 9 can receive the data transmitted by the wireless transmitting module 7, and process the relevant data through the second microprocessor 9. When the nitrogen oxide sensor 5 detects that the nitrogen oxide content in the flue gas exceeds the set value, the second microprocessor 9 controls the PLC controller 11, thereby controlling the flow regulating structure 14 through the PLC controller 11. A burner 12 is provided on one side of the heating furnace body 1, and a gas inlet pipe 13 is provided on the side of the burner 12 away from the heating furnace body 1, and a flow regulating structure 14 is provided on the gas inlet pipe 13.
[0018] The flow regulating structure 14 includes a shell 141, in which a motor 142 is arranged, and a first bevel gear 143 is arranged on the motor 142. A shaft rod 144 is inserted into the shell 141 on the side away from the motor 142, and a second bevel gear 145 meshing with the first bevel gear 143 is arranged on the shaft rod 144. The lower end of the shaft rod 144 passes through the gas intake pipe 13 and is fixedly connected with the valve plate 146. When the motor 142 is working, the motor 142 drives the first bevel gear 143 to rotate, and the second bevel gear 145 meshing with the first bevel gear 143 starts to rotate under the drive of the first bevel gear 143. The shaft rod 144 can drive the valve plate 146 to rotate through the transmission of the second bevel gear 145. By adjusting the angle of the valve plate 146, the oxygen intake amount of the gas intake pipe 13 can be adjusted, thereby achieving the adjustment of the content of nitrogen oxides in the flue gas in the heating furnace body 1.
[0019] The data acquisition and display device 8 is connected to the motor 142 via a wire 15 .
[0020] The data acquisition and display device 8 is provided with a display screen 16 , and the display screen 16 can display the relevant data monitored by the nitrogen oxide sensor 5 in real time.
[0021] The flue gas analysis box 4 is provided with a box door 17 .
[0022] Specifically, in the present utility model, the nitrogen oxide sensor 5 can detect the content of nitrogen oxides in the flue gas, the first microprocessor 6 can process the relevant data detected by the nitrogen oxide sensor 5, and remotely transmit it through the wireless transmission module 7, the wireless receiving module 10 on the second microprocessor 9 can receive the data transmitted by the wireless transmission module 7, and process the relevant data through the second microprocessor 9, when the nitrogen oxide sensor 5 detects that the nitrogen oxide content in the flue gas exceeds the set value, the second microprocessor 9 controls the PLC controller 11, so that the PLC controller 11 controls the motor 142, the motor 142 drives the first bevel gear 143 to rotate, and the second bevel gear 145 meshing with the first bevel gear 143 starts to rotate under the drive of the first bevel gear 143, and the shaft 144 can drive the valve plate 146 to rotate through the transmission of the second bevel gear 145, and the oxygen intake of the gas inlet pipe 13 can be adjusted by adjusting the angle of the valve plate 146, so as to adjust the content of nitrogen oxides in the flue gas in the heating furnace body 1.
[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A low-nitrogen combustion NOX content monitoring system for a gas heating furnace, comprising a heating furnace body (1) and a data acquisition and display device (8), characterized in that: A smoke exhaust pipe (2) is provided in the middle of the upper part of the heating furnace body (1); a mounting frame (3) is provided on one side of the smoke exhaust pipe (2); a smoke analysis box (4) is fixedly mounted on the mounting frame (3); a nitrogen oxide sensor (5) connected to the smoke analysis box (4) is installed in the smoke exhaust pipe (2); a first microprocessor (6) is provided in the smoke analysis box (4); a wireless transmitter module (7) is provided on the first microprocessor (6); a second microprocessor (9) is provided in the data acquisition and display device (8); a wireless receiver module (10) and a PLC controller (11) matching the wireless transmitter module (7) are provided on the second microprocessor (9); a burner (12) is provided on one side of the heating furnace body (1); a gas inlet pipe (13) is provided on the side of the burner (12) away from the heating furnace body (1); a flow regulating structure (14) is provided on the gas inlet pipe (13).
2. A gas heating furnace low nitrogen combustion NOX content monitoring system according to claim 1, characterized in that: The flow regulating structure (14) comprises a housing (141), a motor (142) is arranged in the housing (141), a first bevel gear (143) is arranged on the motor (142), a shaft (144) is inserted into the housing (141) at a side away from the motor (142), a second bevel gear (145) meshing with the first bevel gear (143) is arranged on the shaft (144), and the lower end of the shaft (144) passes through the gas inlet pipe (13) and is fixedly connected to the valve plate (146).
3. A gas heating furnace low nitrogen combustion NOX content monitoring system according to claim 2, characterized in that: The data acquisition and display device (8) is connected to the motor (142) via a wire (15).
4. A gas heating furnace low nitrogen combustion NOX content monitoring system according to claim 1, characterized in that: The data acquisition and display device (8) is provided with a display screen (16).
5. A gas heating furnace low nitrogen combustion NOX content monitoring system according to claim 1, characterized in that: The flue gas analysis box (4) is provided with a box door (17).