Long-flame low-nitrogen burner of rotary kiln
By designing a long flame low-nitrogen burner in a rotary kiln burner, using the combination of combustion-supporting air plate spray holes and fuel gas plate spray holes, the problems of insufficient flame length and difficult to control the amount of nitrogen oxides are solved, and better calcination effect and low nitrogen emissions are achieved.
Patent Information
- Application Number
- CN202421120733.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-05-22
AI Technical Summary
The flame length of the existing rotary kiln burners is insufficient, resulting in poor calcination effect and difficulty in controlling the amount of nitrogen oxides.
A rotary kiln long flame low-nitrogen burner is designed, using ignition gun, ignition gun thruster, ignition air passage, ignition air gun spray hole, fuel pipeline, combustion air cyclone, combustion air plate spray hole and combustion pipe. The length of the combustion flame is increased through the combination of combustion air plate spray hole and fuel gas plate spray hole.
The mixing uniformity between fuel and combustion-stimulating air is strengthened, the hypoxia combustion is deepened, the nitrogen oxide emissions are effectively reduced, and the calcination effect is improved.
Smart Images
Figure CN223004971U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of burners, in particular to a long-flame low-nitrogen burner for a rotary kiln. Background Art
[0002] At present, the burner extends into the kiln head hood and is located at the front end of the kiln body for combustion. High-temperature flue gas and limestone move in opposite directions in the kiln body, and the limestone in the kiln body is calcined through heat radiation, heat conduction, and convective heat transfer, etc.
[0003] However, in the prior art, due to the structure of the rotary kiln, the flame length of the burner is insufficient, resulting in poor calcination effect, and at the same time, it is not easy to control the generation amount of nitrogen oxides. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a long-flame low-nitrogen burner for a rotary kiln, aiming to solve the technical problem in the prior art that due to the structure of the rotary kiln, the flame length of the burner is insufficient, resulting in poor calcination effect, and at the same time, it is not easy to control the generation amount of nitrogen oxides.
[0005] To achieve the above purpose, a long-flame low-nitrogen burner for a rotary kiln adopted by the utility model includes an ignition gun, an ignition gun pusher, an ignition air channel, an ignition air gun nozzle, a fuel pipeline, a combustion-supporting air swirler, a combustion-supporting air plate nozzle, and a combustion-supporting pipeline. The ignition gun is arranged at one end of the ignition gun pusher. The ignition air channel is communicated with the ignition gun pusher and is located at one end of the ignition gun pusher. And the ignition air channel penetrates through the combustion-supporting pipeline. The ignition air gun nozzle is fixedly connected with the ignition air channel and is located at one end of the ignition air channel. One end of the fuel pipeline penetrates through the combustion-supporting pipeline. The combustion-supporting air swirler is fixedly connected with the fuel pipeline and is sleeved on the outer wall of the fuel pipeline. The combustion-supporting air plate nozzle is fixedly connected with the combustion-supporting air swirler and is located at one end of the combustion-supporting air swirler. And the ignition air gun nozzle penetrates through the combustion-supporting air plate nozzle.
[0006] Wherein, the combustion-supporting pipeline includes a combustion-supporting air duct, a combustion-supporting air inlet duct, a panel flange, and a mounting flange. The combustion-supporting air inlet duct is communicated with the combustion-supporting air duct and is located on the outer wall of the combustion-supporting air duct. The panel flange is fixedly connected with the combustion-supporting air duct and is located at one end of the combustion-supporting air duct. The mounting flange is fixedly connected with the combustion-supporting air duct and is sleeved on the outer wall of the combustion-supporting air duct.
[0007] Wherein, the fuel pipeline includes a fuel flange, an ignition fuel gas channel, a main fuel channel, a fuel cyclone, and a fuel gas plate-shaped nozzle. The main fuel channel penetrates through the combustion-supporting air duct and is fixedly connected to the combustion-supporting air cyclone. Both ends of the ignition fuel gas channel are respectively communicated with the ignition air channel and the main fuel channel. The fuel flange is fixedly connected to the main fuel channel and sleeved on the outer wall of the main fuel channel. The fuel cyclone is fixedly connected to the main fuel channel and embedded in the inner side of the main fuel channel. The fuel gas plate-shaped nozzle is arranged at one end of the main fuel channel.
[0008] The beneficial effects of a rotary kiln long-flame low-nitrogen burner of the present utility model are as follows: It strengthens the uniformity of the mixture of fuel and combustion-supporting air during combustion, and further deepens the oxygen-deficient combustion at the same time, which can effectively reduce the emission of nitrogen oxides. By adopting the combustion-supporting air plate-shaped nozzle and the fuel gas plate-shaped nozzle, the length of the combustion flame can be effectively increased, making the calcination effect better. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0010] Figure 1 is a schematic structural diagram of a rotary kiln long-flame low-nitrogen burner of the present utility model.
[0011] Figure 2 is a side view of a rotary kiln long-flame low-nitrogen burner of the present utility model.
[0012] Figure 3 is a partial enlarged structural view of a rotary kiln long-flame low-nitrogen burner of the present utility model.
[0013] 1 - Ignition gun, 2 - Ignition gun thruster, 3 - Ignition air channel, 4 - Ignition gas gun nozzle, 5 - Fuel flange, 6 - Ignition fuel gas channel, 7 - Main fuel channel, 8 - Fuel cyclone, 9 - Fuel gas plate-shaped nozzle, 10 - Combustion-supporting air cyclone, 11 - Combustion-supporting air plate-shaped nozzle, 12 - Combustion-supporting air duct, 13 - Combustion-supporting air inlet duct, 14 - Panel flange, 15 - Installation flange. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0014] Please refer to Figures 1 to 3, the present utility model provides a rotary kiln long-flame low-nitrogen burner, which includes an ignition gun 1, an ignition gun thruster 2, an ignition air passage 3, an ignition gas gun nozzle 4, a fuel pipeline, a combustion-supporting air swirler 10, a combustion-supporting air plate nozzle 11 and a combustion-supporting pipeline. The ignition gun 1 is arranged at one end of the ignition gun thruster 2. The ignition air passage 3 is communicated with the ignition gun thruster 2 and is located at one end of the ignition gun thruster 2, and the ignition air passage 3 penetrates through the combustion-supporting pipeline. The ignition gas gun nozzle 4 is fixedly connected with the ignition air passage 3 and is located at one end of the ignition air passage 3. One end of the fuel pipeline penetrates through the combustion-supporting pipeline. The combustion-supporting air swirler 10 is fixedly connected with the fuel pipeline and is sleeved on the outer wall of the fuel pipeline. The combustion-supporting air plate nozzle 11 is fixedly connected with the combustion-supporting air swirler 10 and is located at one end of the combustion-supporting air swirler 10, and the ignition gas gun nozzle 4 penetrates through the combustion-supporting air plate nozzle 11.
[0015] Further, the combustion-supporting pipeline includes a combustion-supporting air duct 12, a combustion-supporting air inlet duct 13, a panel flange 14 and a mounting flange 15. The combustion-supporting air inlet duct 13 is communicated with the combustion-supporting air duct 12 and is located on the outer wall of the combustion-supporting air duct 12. The panel flange 14 is fixedly connected with the combustion-supporting air duct 12 and is located at one end of the combustion-supporting air duct 12. The mounting flange 15 is fixedly connected with the combustion-supporting air duct 12 and is sleeved on the outer wall of the combustion-supporting air duct 12.
[0016] Further, the fuel pipeline includes a fuel flange 5, an ignition fuel gas passage 6, a fuel main passage 7, a fuel gas swirler 8 and a fuel gas plate nozzle 9. The fuel main passage 7 penetrates through the combustion-supporting air duct 12 and is fixedly connected with the combustion-supporting air swirler 10. Both ends of the ignition fuel gas passage 6 are respectively communicated with the ignition air passage 3 and the fuel main passage 7. The fuel flange 5 is fixedly connected with the fuel main passage 7 and is sleeved on the outer wall of the fuel main passage 7. The fuel gas swirler 8 is fixedly connected with the fuel main passage 7 and is embedded in the inner side of the fuel main passage 7. The fuel gas plate nozzle 9 is arranged at one end of the fuel main passage 7.
[0017] In this embodiment, the mounting flange 15 is mounted on the rotary kiln. The combustion-supporting air inlet pipe 13 is connected to a blower. Air enters the combustion-supporting air pipe 12 and the rotary kiln through the combustion-supporting air inlet pipe 13. Open the air valve of the ignition gun 1, and push the ignition gun 1 to a proper position by advancing the ignition gun pusher 2. The ignition gun 1 ignites. The ignition flame passes through the ignition air passage 3 and is ejected through the ignition gas gun nozzle 4. After the ignition time of the ignition gun 1 is up, the ignition stops, and the ignition gun pusher 2 automatically retracts. The combustion-supporting air swirler 10 and the fuel gas swirler 8 make the fuel and the combustion-supporting air mix evenly and are ejected through the fuel gas plate nozzle 9. The ignition fuel gas passage 6 feeds the fuel in the fuel main passage 7 into the ignition air passage 3, facilitating ignition. The fuel flange 5 is used to connect the input of the fuel, enhancing the uniformity of the mixture of the fuel and the combustion-supporting air during combustion. At the same time, the anoxic combustion is further deepened, effectively reducing the emission of nitrogen oxides. By using the combustion-supporting air plate nozzle 11 and the fuel gas plate nozzle 9, the length of the combustion flame can be effectively increased, making the calcination effect better.
[0018] The above-disclosed is only a preferred embodiment of the present invention. Of course, it cannot be used to limit the scope of the rights of the present invention. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.
Claims
1. A rotary kiln long flame low nitrogen burner, characterized in that: It includes an ignition gun, an ignition gun thruster, an ignition air channel, an ignition air gun spray hole, a fuel pipeline, a combustion-supporting air swirler, a combustion-supporting air plate-type spray hole and a combustion-supporting pipeline, the ignition gun is arranged at one end of the ignition gun thruster, the ignition air channel is connected to the ignition gun thruster and is located at one end of the ignition gun thruster, and the ignition air channel runs through the combustion-supporting pipeline, the ignition air gun spray hole is fixedly connected to the ignition air channel and is located at one end of the ignition air channel, one end of the fuel pipeline runs through the combustion-supporting pipeline, the combustion-supporting air swirler is fixedly connected to the fuel pipeline and is sleeved on the outer wall of the fuel pipeline, the combustion-supporting air plate-type spray hole is fixedly connected to the combustion-supporting air swirler and is located at one end of the combustion-supporting air swirler, and the ignition air gun spray hole runs through the combustion-supporting air plate-type spray hole.
2. A rotary kiln long flame low nitrogen burner as claimed in claim 1, characterized in that: The combustion-supporting pipeline includes a combustion-supporting air duct, a combustion-supporting air inlet duct, a panel flange and a mounting flange. The combustion-supporting air inlet duct is communicated with the combustion-supporting air duct and is located on the outer wall of the combustion-supporting air duct. The panel flange is fixedly connected to the combustion-supporting air duct and is located at one end of the combustion-supporting air duct. The mounting flange is fixedly connected to the combustion-supporting air duct and is sleeved on the outer wall of the combustion-supporting air duct.
3. A rotary kiln long flame low nitrogen burner as claimed in claim 2, characterized in that: The fuel pipeline includes a fuel flange, an ignition fuel gas channel, a main fuel channel, a fuel cyclone and a fuel gas plate-type spray hole. The main fuel channel runs through the combustion-supporting air duct and is fixedly connected to the combustion-supporting air cyclone. The two ends of the ignition fuel gas channel are respectively connected to the ignition air channel and the main fuel channel. The fuel flange is fixedly connected to the main fuel channel and is sleeved on the outer wall of the main fuel channel. The fuel cyclone is fixedly connected to the main fuel channel and is embedded in the inner side of the main fuel channel. The fuel gas plate-type spray hole is arranged at one end of the main fuel channel.