CN210021685U - Ammonia spraying grid for SNCR denitration of zinc oxide rotary kiln - Google Patents
Ammonia spraying grid for SNCR denitration of zinc oxide rotary kiln Download PDFInfo
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- CN210021685U CN210021685U CN201920633639.1U CN201920633639U CN210021685U CN 210021685 U CN210021685 U CN 210021685U CN 201920633639 U CN201920633639 U CN 201920633639U CN 210021685 U CN210021685 U CN 210021685U
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Abstract
The utility model belongs to the technical field of zinc oxide rotary kiln flue gas is administered, a ammonia injection grid for zinc oxide rotary kiln SNCR denitration is proposed. The ammonia spraying grid for SNCR denitration of the zinc oxide rotary kiln is provided with a conveying pipeline arranged in a settling chamber; the ammonia injection grid is also provided with a flow pipeline in the kiln body; the circulating pipeline is arranged along the length direction of the kiln body; one end of the circulating pipeline extends out of the kiln body and is communicated with a conveying pipeline positioned in the settling chamber, the other end of the circulating pipeline extends into a reaction area of the kiln body, and a distribution disc is arranged at the end head of the circulating pipeline; a plurality of distribution pipes communicated with the distribution disc are arranged on the circumference of the distribution disc; the distribution pipes are arranged in a star shape, each distribution pipe is provided with a plurality of spray heads, and the mounting directions of two adjacent spray heads are opposite; a plurality of inclined struts for supporting the circulation pipeline are arranged corresponding to the circulation pipeline. The utility model provides an application difficult problem of SNCR in the zinc oxide rotary kiln, reduced the denitration cost of zinc oxide rotary kiln.
Description
Technical Field
The utility model belongs to the technical field of industrial kiln flue gas treatment, mainly relate to an ammonia injection grid for zinc oxide rotary kiln SNCR denitration.
Background
The ammonia spraying grid is one of key equipment of the SNCR denitration device of the zinc oxide rotary kiln; the well-designed ammonia injection grid needs to have the medium uniform distribution effect as large as possible, so that the denitration agent and the flue gas are fully mixed, the equipment cost is low, the stability is high, and the special working condition of the zinc oxide rotary kiln can be adapted; in the zinc oxide smelting process, because the kiln body is constantly doing the rotation, traditional flue gas denitration is with spouting ammonia grid can't effectually fix and utilize, consequently, the research design can adapt to the ammonia-spraying grid of zinc oxide rotary kiln operating mode and have certain practical meaning.
Disclosure of Invention
The utility model aims at providing an ammonia injection grid for zinc oxide rotary kiln SNCR denitration makes its nitrogen oxide in effectively getting rid of the flue gas, does not influence zinc oxide product quality simultaneously.
The utility model adopts the following technical proposal to complete the invention task:
an ammonia injection grid for SNCR denitration of a zinc oxide rotary kiln is provided with a conveying pipeline arranged in a settling chamber; the ammonia injection grid is also provided with a flow pipeline in the kiln body; the circulating pipeline is arranged along the length direction of the kiln body; one end of the circulating pipeline extends out of the kiln body and is communicated with a conveying pipeline positioned in the settling chamber, the other end of the circulating pipeline extends into a reaction area of the kiln body, and a distribution disc is arranged at the end head of the circulating pipeline; a plurality of distribution pipes communicated with the distribution disc are arranged on the circumference of the distribution disc; the distribution pipes are arranged in a star shape, each distribution pipe is provided with a plurality of spray heads, and the mounting directions of two adjacent spray heads are opposite; a plurality of inclined struts for supporting the circulation pipeline are arranged corresponding to the circulation pipeline; the inclined strut is fixed on the blanking pipe, and the blanking pipe is fixed on the settling chamber through the reinforcing pipe.
The diameter of the flow conduit is smaller than the diameter of the delivery conduit.
The utility model provides an ammonia injection grid for zinc oxide rotary kiln SNCR denitration adopts above-mentioned technical scheme, has following beneficial effect: when the ammonia injection grid works, the connecting pipe can extend into the kiln body due to the fixing and supporting functions of the inclined strut, so that the SNCR reaction is ensured to be carried out in a reasonable temperature interval; the pressure flow of the distribution disc and the pressure flow of the distribution pipe are uniformly distributed, so that the flow balance of each nozzle is ensured, and the mixing effect of the flue gas and the denitrifying agent is improved; due to the atomization effect of the nozzle, the turbulent flow state between the flue gas and the denitrifier is enhanced, the denitration reaction is favorably and rapidly carried out, and the denitration efficiency is improved; meanwhile, the ammonia injection grid is simple in structure and small in fluid circulation resistance, and has no adverse effect on the collection and product quality of zinc oxide rotary kiln products.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the distribution pipe and the nozzle of the present invention.
In the figure: 1. conveying pipeline, 2, circulation pipeline, 3, distribution disc, 4, bracing, 5, stand, 6, distribution pipe, 7, shower nozzle, 8, settling chamber, 9, kiln body, 10, unloading pipe.
Detailed Description
The invention is described in connection with the accompanying drawings and the embodiments:
as shown in fig. 1, and in combination with fig. 2, an ammonia injection grid for SNCR denitration of a zinc oxide rotary kiln is provided with a conveying pipe 1 arranged in a settling chamber 8; the ammonia injection grid is also provided with a flow pipeline 2 in the kiln body 9; the circulation pipeline 2 is arranged along the length direction of the kiln body 9; the diameters of the conveying pipeline 1 and the circulating pipeline 2 are determined by the treated flue gas volume and the concentration of nitrogen oxides, the diameter of the circulating pipeline 2 is smaller than that of the conveying pipeline 1, the length of the conveying pipeline 1 is determined by the specification of a settling chamber, and the length of the circulating pipeline 2 is determined by the flue gas temperature of a rotary kiln; one end of the circulation pipeline 2 extends out of the kiln body 9 and is communicated with the conveying pipeline 1 positioned in the settling chamber 8, the other end of the circulation pipeline 2 extends into the reaction area of the kiln body 9, the end head of the circulation pipeline is provided with a distribution disc 3, and the denitration agent is conveyed to the reaction area at 800-1100 ℃ through the circulation pipeline in the kiln body; a plurality of distribution pipes 6 communicated with the distribution disc 3 are arranged on the circumference of the distribution disc; the diameter of the distribution disc 3 is determined by the dosage of the denitrifier, and the length of the distribution disc is 300 mm; the length and the number of the distribution pipes 6 are determined by the diameter of the rotary kiln, and the diameter of the distribution pipes 6 is determined by the dosage of the denitrifier; the distribution pipes 6 are arranged in a star shape, each distribution pipe 6 is provided with a plurality of spray heads 7, and the installation directions of two adjacent spray heads 7 are opposite; the specification of the spray nozzles 7 is determined by the flow rate of the flue gas, and the number of the spray nozzles 7 is determined by the amount of the flue gas; a plurality of inclined struts 4 for supporting the circulation pipeline are arranged corresponding to the circulation pipeline; the inclined strut is fixed on the blanking pipe 10, and the blanking pipe and the reinforcing pipe are firmly fixed on the settling chamber; the upright post 5 is arranged corresponding to the conveying pipeline and used for supporting the conveying pipeline; the denitration agent enters a circulating pipeline in the kiln body through a conveying pipeline in the settling chamber, and is sprayed out through nozzles arranged on the distribution pipe through the pressure and flow uniform distribution effect of the distribution disc, so that the denitration agent is fully mixed with the flue gas, and the nitrogen oxides in the flue gas are removed.
The utility model discloses when using: the denitration agent enters the settling chamber through the conveying pipeline 1, then enters an SNCR reaction temperature area in the rotary kiln through the circulating pipeline 2, enters the 6 distribution pipes through the pressure and flow uniform distribution effect of the distribution disc 3, and then is fully mixed with high-temperature flue gas through the atomization effect of the spray head 7 to remove partial nitrogen oxides.
Claims (2)
1. An ammonia injection grid for SNCR denitration of a zinc oxide rotary kiln is characterized in that: the ammonia injection grid is provided with a conveying pipeline arranged in the settling chamber; the ammonia injection grid is also provided with a flow pipeline in the kiln body; the circulating pipeline is arranged along the length direction of the kiln body; one end of the circulating pipeline extends out of the kiln body and is communicated with a conveying pipeline positioned in the settling chamber, the other end of the circulating pipeline extends into a reaction area of the kiln body, and a distribution disc is arranged at the end head of the circulating pipeline; a plurality of distribution pipes communicated with the distribution disc are arranged on the circumference of the distribution disc; the distribution pipes are arranged in a star shape, each distribution pipe is provided with a plurality of spray heads, and the mounting directions of two adjacent spray heads are opposite; a plurality of inclined struts for supporting the circulation pipeline are arranged corresponding to the circulation pipeline; the inclined strut is fixed on the blanking pipe, and the blanking pipe is fixed on the settling chamber through the reinforcing pipe.
2. The ammonia injection grid for SNCR denitration of a zinc oxide rotary kiln as recited in claim 1, wherein: the diameter of the flow conduit is smaller than the diameter of the delivery conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920633639.1U CN210021685U (en) | 2019-05-06 | 2019-05-06 | Ammonia spraying grid for SNCR denitration of zinc oxide rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920633639.1U CN210021685U (en) | 2019-05-06 | 2019-05-06 | Ammonia spraying grid for SNCR denitration of zinc oxide rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210021685U true CN210021685U (en) | 2020-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920633639.1U Active CN210021685U (en) | 2019-05-06 | 2019-05-06 | Ammonia spraying grid for SNCR denitration of zinc oxide rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210021685U (en) |
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2019
- 2019-05-06 CN CN201920633639.1U patent/CN210021685U/en active Active
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| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 471000 1-10-1006, Runsheng building, intersection of Heluo road and Sanshan Road, high tech Zone, Luoyang area, China (Henan) pilot Free Trade Zone, Luoyang City, Henan Province Patentee after: Luoyang Hollysys Environmental Protection Engineering Co., Ltd Address before: 471000 1-10-1006, Runsheng building, intersection of Heluo road and Sanshan Road, high tech Zone, Luoyang area, China (Henan) pilot Free Trade Zone, Luoyang City, Henan Province Patentee before: Luoyang Helishi Environmental Protection Technology Co.,Ltd. |