A low-nitrogen burner adapted to yellow phosphorus tail gas
By designing a low-NOx burner adapted to yellow phosphorus exhaust gas and adopting a detachable nozzle and cyclone separator structure, the problems of corrosion and scaling during the combustion of yellow phosphorus exhaust gas were solved, achieving stable low-NOx combustion and pollutant reduction.
Patent Information
- Application Number
- CN202423207499.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-24
AI Technical Summary
In the prior art, during the combustion process of yellow phosphorus tail gas, the corrosive components cause problems with burner corrosion and scaling, leading to durability issues with burner scale. Furthermore, there are existing problems with the application of low-NOx burners for yellow phosphorus tail gas.
Design a low-NOx burner adapted to yellow phosphorus exhaust gas, employing a detachable nozzle structure and cyclone separator. The nozzle is made of stainless steel, with a specific injection angle designed. Combined with a purging pipe for the removal of accumulated ash and dirt, it achieves rapid mixing of fuel gas and combustion air.
It achieves stable low-NOx combustion of yellow phosphorus tail gas, reduces the generation of pollutants such as NOx, avoids corrosion and scaling of combustion equipment, and improves the stability and safety of combustion equipment.
Smart Images
Figure CN223610109U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of tail gas treatment, specifically relates to a low nitrogen combustor suitable for yellow phosphorus tail gas. BACKGROUND
[0002] Yellow phosphorus is a kind of widely used industrial raw material, at present, yellow phosphorus is mostly produced by electric furnace method, and in the production process by using this method, 2800-3200Nm3 yellow phosphorus tail gas rich in CO (85-90%) is generated for every ton of phosphorus generated.Yellow phosphorus tail gas is high-quality fuel gas due to high calorific value, but it contains phosphorus, sulfur, moisture and some dust.Because of the corrosive component-containing gas property of yellow phosphorus tail gas, it needs to be washed by water, dedusted, purified and the like before being used as fuel gas.
[0003] Even after purification, the residual phosphorus, sulfur and the like in yellow phosphorus tail gas will produce phosphoric acid, sulfuric acid and the like after combustion, which will corrode the combustion equipment, and the residual ash in fuel gas will scale the combustion equipment, and a large amount of nitrogen oxides will be generated when yellow phosphorus tail gas is combusted at high temperature, which not only makes the pollutant emission unqualified, but also affects the stable and safe combustion of the combustion equipment.
[0004] In order to better utilize yellow phosphorus tail gas, and for the stable combustion of similar corrosive and impurity-containing medium and low calorific value gas, the applicant designs a combustor capable of low-nitrogen combustion and suitable for the easy corrosion and scaling characteristics of yellow phosphorus tail gas combustion. CONTENT OF THE UTILITY MODEL
[0005] Based on this, in order to solve the above problems, the utility model provides a low nitrogen combustor suitable for yellow phosphorus tail gas.
[0006] The purpose of the utility model can be realized by the following technical schemes:
[0007] A low nitrogen combustor suitable for yellow phosphorus tail gas, comprising a shell, the opposite ends of the shell are respectively an air inlet end and a combustion end, a first circular ring plate and a second circular ring plate are coaxially arranged from inside to outside in the combustion end, a central air duct is formed in the first circular ring plate, a first combustion-supporting air duct is formed between the first circular ring plate and the second circular ring plate, a second combustion-supporting air duct is formed between the second circular ring plate and the shell, a plurality of first inner nozzles and second inner nozzles are arranged around the central axis in the first combustion-supporting air duct, a plurality of first outer nozzles and second outer nozzles are arranged around the central axis in the second combustion-supporting air duct, all the nozzles comprise a flow guide part and a jet part which are detachably connected, and a purge pipeline is further connected to the nozzles.
[0008] Adopting the above structure, the flow guide part and the injection part are detachably connected, so that when the injection part of a certain nozzle is corroded or damaged, it can be individually disassembled and replaced, which is economical and convenient. By connecting the blowing pipeline on the nozzle, the high-pressure medium can be used to blow off the accumulated ash and dirt at the combustion end position of each nozzle and the shell.
[0009] In the specific embodiment of the utility model, the injection part of the first inner nozzle is integrally welded, which is divided into a first horizontal section and a first inclined section connected to the front end of the first horizontal section, a first included angle is formed between the first horizontal section and the first inclined section, and the first included angle is 5-75 degrees.
[0010] In the specific embodiment of the utility model, the injection part of the second inner nozzle is integrally welded, which is divided into a second horizontal section and an L-shaped elbow section connected to the front end of the second horizontal section.
[0011] In the specific embodiment of the utility model, the injection part of the first outer nozzle is integrally welded, which is divided into a third horizontal section and a second inclined section connected to the front end of the third horizontal section, a second included angle is formed between the third horizontal section and the second inclined section, and the second included angle is 10-90 degrees.
[0012] In the specific embodiment of the utility model, the injection part of the second outer nozzle is integrally welded, which is divided into a fourth horizontal section and a third inclined section connected to the front end of the fourth horizontal section, a third included angle is formed between the fourth horizontal section and the third inclined section, and the third included angle is 0-45 degrees.
[0013] In the specific embodiment of the utility model, the front end of the center air duct is provided with a first cyclone, and the front end of the first combustion-supporting air duct is provided with a second cyclone. With this structure, the fuel gas injected by each nozzle can be quickly mixed with the combustion-supporting air supplied by each air duct, and stable operation of combustion can be realized.
[0014] In the specific embodiment of the utility model, the injection part of all nozzles is made of stainless steel.
[0015] In summary, all the spray pipes in the utility model all include the flow guide part and the spray part which are detachably connected, so that when the spray part of a certain spray pipe is corroded or damaged, it can be individually disassembled and replaced, which is economical and convenient. By connecting the purge pipeline on the spray pipe, the accumulated ash and dirt at the combustion end position of each spray pipe and the shell can be purged by using high-pressure medium, which can effectively blow off the accumulated ash and dirt. The combustion gas enters the combustion end through the first inner spray pipe, the second inner spray pipe, the first outer spray pipe and the second outer spray pipe, and the combustion-supporting wind enters the combustion end through the central wind channel, the first combustion-supporting wind channel and the second combustion-supporting wind channel, the spray angles of each spray pipe are different, so that the combustion gas is more evenly distributed, and the local high-temperature area of the flame can be effectively avoided, and the formation of pollutants such as NOx can be reduced. The flow device can make the combustion gas sprayed by each spray pipe and the combustion-supporting wind supplied by each wind channel mix quickly, so that the stable operation of combustion is realized. Moreover, after combustion is completed, the combustion-supporting wind forms a vortex through the cyclone, which can also effectively blow off the accumulated ash and dirt at the outlet position of the burner shell. BRIEF DESCRIPTION OF DRAWINGS
[0016] The utility model will be further described below in combination with the drawings.
[0017] Figure 1 It is a structure schematic view of a low-nitrogen burner suitable for yellow phosphorus tail gas of the utility model;
[0018] Figure 2 It is a front view of the low-nitrogen burner of the utility model. DETAILED DESCRIPTION
[0019] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0020] Please refer to Figure 1 and Figure 2 The utility model is a low-nitrogen burner suitable for yellow phosphorus tail gas, which comprises a shell 10, and the opposite ends of the shell 10 are respectively an air inlet end and a combustion end. A first circular ring plate 11 and a second circular ring plate 12 are coaxially arranged in the combustion end from inside to outside. A central wind channel 13 is formed in the first circular ring plate. A first combustion-supporting wind channel 14 is formed between the first circular ring plate and the second circular ring plate. A second combustion-supporting wind channel 15 is formed between the second circular ring plate and the shell.
[0021] A plurality of first inner nozzles 20 and second inner nozzles 21 are arranged around the center axis of the shell in the first combustion air channel 14. A plurality of first outer nozzles 22 and second outer nozzles 23 are arranged around the center axis of the shell in the second combustion air channel 15. All the nozzles comprise a detachably connected flow guide 24 and a jet 25. A blowing pipe 26 is connected to the nozzles. In this way, when the jet of a certain nozzle is corroded or damaged, the jet can be individually replaced, which is economical and convenient. By connecting the blowing pipe to the jet, the accumulated ash and dirt at the combustion end of the shell can be blown away by using high-pressure medium.
[0022] In the embodiment, the jet of the first inner nozzle 20 is integrally welded and comprises a first horizontal section 201 and a first inclined section 202 connected to the front end of the first horizontal section 201. A first included angle is formed between the first horizontal section 201 and the first inclined section 202, and the first included angle is 5°-75°. The jet of the second inner nozzle 21 is integrally welded and comprises a second horizontal section 211 and an L-shaped elbow section 212 connected to the front end of the second horizontal section. The jet of the first outer nozzle 22 is integrally welded and comprises a third horizontal section 221 and a second inclined section 222 connected to the front end of the third horizontal section 221. A second included angle is formed between the third horizontal section 221 and the second inclined section 222, and the second included angle is 10°-90°. The jet of the second outer nozzle 23 is integrally welded and comprises a fourth horizontal section 231 and a third inclined section 232 connected to the front end of the fourth horizontal section 231. A third included angle is formed between the fourth horizontal section 231 and the third inclined section 232, and the third included angle is 0°-45°. In this way, the gas enters the combustion end through the first inner nozzle, the second inner nozzle, the first outer nozzle and the second outer nozzle, and the jet angles of the nozzles are different, so that the gas is more uniformly distributed, the local high-temperature area of the flame can be effectively avoided, and the formation of pollutants such as NOx can be reduced.
[0023] In the embodiment, the jets 25 of all the nozzles are made of stainless steel. The use of stainless steel has the advantages of high temperature resistance and corrosion resistance.
[0024] In the embodiment, the front end of the center air channel is provided with a first cyclone 16, and the front end of the first combustion air channel is provided with a second cyclone 17. With this structure, the gas jetted by the nozzles can be rapidly mixed with the combustion air supplied by the air channels, so that the combustion can be stably operated. Moreover, after the combustion is completed, the combustion air can form a vortex through the cyclone, so that the accumulated ash and dirt at the outlet position of the burner shell can be effectively blown away.
[0025] The working principle of the low-nitrogen burner suitable for yellow phosphorus tail gas is as follows:
[0026] When combustion is needed, ignition is performed by using an igniter, the first inner nozzle, the second inner nozzle, the first outer nozzle and the second outer nozzle stably inject gas, the center channel, the first combustion air channel and the second combustion air channel stably inject combustion air, thereby meeting the stable low-nitrogen combustion of the burner. After combustion is finished, the combustion air continues to pass through the first combustion air channel and the second combustion air channel to blow the soot and dirt on the combustion end of the burner shell, the blowing pipeline is connected with the gas source, and the high-pressure gas blows the soot and dirt in each nozzle and on the combustion end of the burner shell through the blowing pipeline.
[0027] The above has carried out the detailed explanation to one embodiment of the utility model, but the content described is only the preferred embodiment of the utility model, cannot be considered for limiting the implementation scope of the utility model. All equivalent changes and improvements made in the application scope of the utility model should still belong to the patent coverage scope of the utility model.
Claims
1. A low-nitrogen burner adapted to yellow phosphorus tail gas, comprising a shell, the shell having an air inlet end and a combustion end at opposite ends, characterized in that, The first circular ring plate and the second circular ring plate are coaxially arranged in the combustion end from inside to outside, a central air duct is formed in the first circular ring plate, a first combustion-supporting air duct is formed between the first circular ring plate and the second circular ring plate, a second combustion-supporting air duct is formed between the second circular ring plate and the shell, a plurality of first inner nozzles and second inner nozzles are arranged around the central axis in the first combustion-supporting air duct, a plurality of first outer nozzles and second outer nozzles are arranged around the central axis in the second combustion-supporting air duct, all the nozzles comprise detachably connected flow guiding parts and jetting parts, and a blowing pipeline is connected to the nozzles.
2. A low-nitrogen burner adapted to yellow phosphorus off-gas according to claim 1, characterized in that, The jetting part of the first inner nozzle is integrally welded and comprises a first horizontal section and a first inclined section connected to the front end of the first horizontal section, a first included angle is formed between the first horizontal section and the first inclined section, and the first included angle is 5-75°.
3. The low-NOx burner adapted for yellow phosphorus off-gas according to claim 1, characterized in that, The jetting part of the second inner nozzle is integrally welded and comprises a second horizontal section and an L-shaped bent section connected to the front end of the second horizontal section.
4. The low-NOx burner adapted to yellow phosphorus off-gas according to claim 3, characterized in that, The jetting part of the first outer nozzle is integrally welded and comprises a third horizontal section and a second inclined section connected to the front end of the third horizontal section, a second included angle is formed between the third horizontal section and the second inclined section, and the second included angle is 10-90°.
5. The low-NOx burner adapted for yellow phosphorus off-gas according to claim 1, characterized in that, The jetting part of the second outer nozzle is integrally welded and comprises a fourth horizontal section and a third inclined section connected to the front end of the fourth horizontal section, a third included angle is formed between the fourth horizontal section and the third inclined section, and the third included angle is 0-45°.
6. The low-NOx burner adapted for yellow phosphorus off-gas according to claim 1, characterized in that, A first cyclone is arranged at the front end of the central air duct, and a second cyclone is arranged at the front end of the first combustion-supporting air duct.
7. The low-NOx burner adapted for yellow phosphorus off-gas according to claim 1, characterized in that, The jetting parts of all the nozzles are made of stainless steel.