CN217103618U - Sleeve lime kiln device for reducing emission of nitrogen oxides - Google Patents
Sleeve lime kiln device for reducing emission of nitrogen oxides Download PDFInfo
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- CN217103618U CN217103618U CN202220953343.XU CN202220953343U CN217103618U CN 217103618 U CN217103618 U CN 217103618U CN 202220953343 U CN202220953343 U CN 202220953343U CN 217103618 U CN217103618 U CN 217103618U
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Abstract
The utility model relates to a sleeve limekiln device for reducing nitrogen oxide emission. A sleeve limekiln device for reducing emission of nitrogen oxides comprises a sleeve limekiln body, a first induced draft fan, a second induced draft fan, a driving fan, a chimney and a combustion-supporting air ring pipe; the sleeve kiln body comprises an upper burner and a lower burner; the chimney is provided with a flue gas air pipe, and the flue gas air pipe is divided into two paths: the first path of flue gas reaches the inlet of a driving fan through a first induced draft fan, is mixed with combustion-supporting air introduced by a Roots fan and then is sent into a combustion chamber of the sleeve kiln body for combustion; and the second path of flue gas passes through a second induced draft fan to reach a combustion-supporting air ring pipe, is mixed by combustion-supporting air and then respectively enters an upper burner and a lower burner to be combusted. The utility model provides a sleeve limekiln device that reduces nitrogen oxide and discharge utilizes the flue gas of producing certainly to dilute combustion air through annular sleeve limekiln, thereby reduces flame core temperature and reduces its self nitrogen oxide emission content.
Description
Technical Field
The utility model relates to a sleeve limekiln device for reducing nitrogen oxide emission.
Background
At present, the content of nitrogen oxides in the flue gas normally discharged by the sleeve lime kiln generally exceeds 300mg/Nm 3 With the stricter and stricter requirements of environmental protection on the emission of nitrogen oxides in industrial furnaces, the existing production process of the sleeve kiln can not meet the emission standard of the nitrogen oxides in the sleeve kiln.
In the production of the sleeve kiln, the primary combustion air of the burner and the driving air of the circulating gas of the lower burner are both air, so that the fuel near the burner can be quickly combusted to generate local high temperature when meeting the air, and the amount of generated nitrogen oxides is very large.
Disclosure of Invention
The utility model provides a reduce sleeve limekiln device that nitrogen oxide discharged utilizes the flue gas of producing certainly through the annular sleeve limekiln to dilute combustion-supporting air, thereby reduces flame core temperature and reduces its self nitrogen oxide emission content.
The utility model provides a technical scheme of above-mentioned problem is: a sleeve lime kiln device for reducing nitrogen oxide emission is characterized in that:
the device comprises a sleeve kiln body, a first induced draft fan, a second induced draft fan, a driving fan, a chimney and a combustion-supporting air ring pipe;
the sleeve kiln body comprises an upper burner and a lower burner;
the chimney is provided with a flue gas air pipe, and the flue gas air pipe is divided into two paths:
the first path of flue gas reaches the inlet of a driving fan through a first induced draft fan, is mixed with combustion-supporting air introduced by a Roots fan and then is sent into a combustion chamber of the sleeve kiln body for combustion;
and the second path of flue gas passes through a second induced draft fan to reach a combustion-supporting air ring pipe, is mixed with combustion-supporting air and then respectively enters an upper burner and a lower burner to be combusted.
Furthermore, the combustion-supporting air ring pipe comprises an upper combustion-supporting air ring pipe and a lower combustion-supporting air ring pipe, and the outlet ends of the second induced draft fans respectively enter the upper combustion-supporting air ring pipe and the lower combustion-supporting air ring pipe, and then are mixed by combustion-supporting air and respectively enter the upper burner and the lower burner for combustion.
Furthermore, the upper combustion-supporting air ring pipe and the lower combustion-supporting air ring pipe are respectively provided with an adjusting valve.
Regulating the content of the flue gas by a regulating valve; meanwhile, the oxygen content in the air entering the combustion-supporting air ring pipe is adjusted, so that the sufficient combustion is ensured, and the generation amount of nitrogen oxides is reduced.
Further, the Roots blower comprises a variable-frequency Roots blower and a fixed-frequency Roots blower; the outlet end of the first draught fan is connected with a first draught fan regulating valve, a combustion-supporting air valve is connected to a combustion-supporting air pipeline, the first draught fan regulating valve is connected with the inlet of the variable-frequency Roots blower and the inlet of the fixed-frequency Roots blower after being communicated with the outlet of the combustion-supporting air valve, the outlet of the fixed-frequency Roots blower is connected with the inlet of the driving blower, the outlet of the variable-frequency Roots blower and the outlet of the driving blower are respectively connected with a one-way valve, and the two one-way valves are connected to the combustion chamber of the sleeve kiln body through pipelines.
Controlling the content of flue gas entering driving air by adjusting a valve of a first induced draft fan; meanwhile, adjusting a valve of a combustion-supporting air valve to control the content of air; the proportion of the flue gas and the air is ensured, so that the central temperature of the flame is not over-temperature, and the content of the discharged nitrogen oxides is not over-standard.
The sleeve kiln further comprises a dust remover, the dust remover is arranged between the sleeve kiln body and the chimney, and waste flue gas discharged by the sleeve kiln body enters the chimney after being subjected to waste removal and dust removal by the dust remover and is discharged by the chimney.
Further, the flue gas air pipe is arranged on the side wall of the chimney.
The utility model has the advantages that:
the utility model provides a sleeve limekiln device for reducing nitrogen oxide emission, which can reduce the nitrogen oxide generation amount of the sleeve limekiln by leading flue gas to the inlets of a combustion-supporting air ring pipe and a driving fan respectively through two ways and mixing the flue gas and air as required; particularly, the oxygen content of the upper burner is properly controlled, so that the generation of nitrogen oxides near the upper burner can be reduced, and the over-high top temperature of the sleeve kiln body caused by oxygen-deficient combustion can be prevented.
Drawings
Fig. 1 is a schematic diagram of a sleeve lime kiln device for reducing nitrogen oxide emission according to the present invention.
In the figure: 1-a sleeve kiln body; 2-upper burner; 3-lower burner; 4-combustion-supporting air ring pipe; 5-a second induced draft fan; 6-a first induced draft fan; 7-driving a fan; 8-a chimney; 9-variable frequency Roots blower; 10-fixed frequency Roots blower.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
As shown in fig. 1, a sleeve lime kiln device for reducing emission of nitrogen oxides comprises a sleeve lime kiln body 1, a first induced draft fan 6, a second induced draft fan 5, a driving fan 7, a chimney 8 and a combustion-supporting air ring pipe 4. The sleeve kiln body 1 comprises an upper burner 2 and a lower burner 3.
The waste flue gas discharged from the sleeve kiln body 1 is discharged through a chimney 8, a flue gas air pipe is arranged on the chimney 8, and the flue gas air pipe is divided into two paths: the first path of flue gas reaches the inlet of a driving fan 7 through a first induced draft fan 6, is mixed with combustion-supporting air introduced by a Roots fan and then is sent into a combustion chamber of the sleeve kiln body 1 for combustion; and the second path of flue gas passes through a second induced draft fan 5 to a combustion-supporting air ring pipe 4, is mixed by combustion-supporting air and then respectively enters an upper burner 2 and a lower burner 3 for combustion.
The utility model provides a sleeve limekiln device that reduces nitrogen oxide and discharge is the poor oxygen flue gas that the sleeve kiln utilized self to produce, and the circulation recycles the nozzle to self, in combustion-supporting air ring canal and the gaseous drive fan of circulation, reduces flame core temperature through the oxygen concentration who dilutes among the combustion-supporting air, reaches the purpose that reduces nitrogen oxide content in the sleeve kiln flue gas.
As an embodiment of the present invention, the combustion-supporting air pipe 4 includes an upper combustion-supporting air pipe and a lower combustion-supporting air pipe, and the outlet end of the second induced draft fan 5 enters the upper combustion-supporting air pipe and the lower combustion-supporting air pipe respectively, and then enters the upper burner 2 and the lower burner 3 respectively after the combustion-supporting air is mixed.
As a preferred embodiment of the present invention, the upper combustion supporting air ring pipe and the lower combustion supporting air ring pipe are respectively provided with an adjusting valve. The governing valve is adjusted the flue gas, adjusts the oxygen content in the air that gets into combustion-supporting air ring canal simultaneously, ensures that nozzle 2 and lower nozzle 3 can make the fuel burning abundant, can not form concentrated burning again to reduce nitrogen oxide production. Particularly, the oxygen content of the upper burner 2 is controlled properly, so that the generation of nitrogen oxides near the upper burner 2 can be reduced, and the over-high top temperature of the sleeve kiln body 1 caused by the oxygen-deficient combustion can be prevented.
As a preferred embodiment of the utility model, the roots blower comprises a variable frequency roots blower 9 and a fixed frequency roots blower 10; the outlet end of the first induced draft fan 6 is connected with a first induced draft fan regulating valve, a combustion air valve is connected on a combustion air pipeline, the first induced draft fan regulating valve is respectively connected with the variable-frequency Roots blower 9 and the fixed-frequency Roots blower 10 after being communicated with the outlet of the combustion air valve, the outlet of the fixed-frequency Roots blower 10 is connected with the inlet of the driving fan 7, the outlet of the variable-frequency Roots blower 9 and the outlet of the driving fan 7 are respectively connected with a one-way valve, and the two one-way valves are connected to the combustion chamber of the sleeve kiln body 1 through pipelines. The first path of flue gas adjusts a first induced draft fan adjusting valve according to the flame condition of the combustion chamber, and controls the flue gas entering a driving fan 7; meanwhile, a combustion-supporting air valve is adjusted and connected to control the content of air; the proportion of the flue gas and the air is ensured, so that the central temperature of the flame is not over-heated, the content of the discharged nitrogen oxides is not over-standard, and the service life of ash and refractory materials is controlled.
As an optimal embodiment of the utility model, still include exhaust fan, dust remover and dust exhausting fan, exhaust fan, dust remover and dust exhausting fan set up between sleeve kiln body 1 and chimney 8, sleeve kiln body 1 exhaust waste flue gas gets into chimney 8 after exhaust fan, dust remover and dust exhausting fan dust remover remove the waste dust, is discharged by chimney 8.
As a preferred embodiment of the utility model, the flue gas tuber pipe is seted up on the lateral wall of chimney 8, does not influence the normal of chimney and discharges fume, can reduce pipeline length simultaneously, save material.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art can still adjust the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some technical features thereof. Therefore, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. The utility model provides a reduce sleeve limekiln device that nitrogen oxide discharged which characterized in that:
comprises a sleeve kiln body (1), a first induced draft fan (6), a second induced draft fan (5), a driving fan (7), a chimney (8) and a combustion-supporting air ring pipe (4);
the sleeve kiln body (1) comprises an upper burner (2) and a lower burner (3);
the chimney (8) is provided with a flue gas air pipe which is divided into two paths:
the first path of flue gas reaches an inlet of a driving fan (7) through a first induced draft fan (6), is mixed with combustion-supporting air introduced by a Roots fan and then is sent into a combustion chamber of the sleeve kiln body (1) for combustion;
and the second path of flue gas passes through a second induced draft fan (5) to a combustion-supporting air ring pipe (4), is mixed by combustion-supporting air and then respectively enters an upper burner (2) and a lower burner (3) for combustion.
2. The lime sleeve kiln plant for reducing nitrogen oxide emissions of claim 1, wherein:
the combustion-supporting air ring pipe (4) comprises an upper combustion-supporting air ring pipe and a lower combustion-supporting air ring pipe, the outlet ends of the second induced draft fans (5) respectively enter the upper combustion-supporting air ring pipe and the lower combustion-supporting air ring pipe, and then the outlet ends of the second induced draft fans are mixed by combustion-supporting air and then respectively enter the upper burner (2) and the lower burner (3) for combustion.
3. The lime sleeve kiln plant for reducing nitrogen oxide emissions of claim 2, wherein:
and the upper combustion-supporting air ring pipe and the lower combustion-supporting air ring pipe are respectively provided with an adjusting valve.
4. The lime sleeve kiln plant for reducing nitrogen oxide emissions of claim 1, wherein:
the Roots blower comprises a variable-frequency Roots blower (9) and a fixed-frequency Roots blower (10); the exit end of first draught fan (6) is connected first draught fan governing valve, connect combustion-supporting air valve on the combustion-supporting air pipeline, first draught fan governing valve and the exit intercommunication back of being connected combustion-supporting air valve respectively with frequency conversion roots's fan (9) and the access connection of deciding roots's fan (10) frequently, decide the access connection of export and driving fan (7) of roots's fan (10) frequently, a check valve is connected respectively with the export of driving fan (7) in the export of frequency conversion roots's fan (9), two check valves pass through the pipe connection to the combustion chamber of sleeve kiln body (1).
5. A lime sleeve kiln plant for reducing nitrogen oxide emissions according to any of claims 1 to 4, characterized in that:
the sleeve kiln is characterized by further comprising a dust remover, wherein the dust remover is arranged between the sleeve kiln body (1) and the chimney (8), and waste flue gas discharged by the sleeve kiln body (1) enters the chimney (8) after being subjected to waste removal and dust removal by the dust remover and is discharged by the chimney (8).
6. The lime sleeve kiln plant for reducing nitrogen oxide emissions of claim 5, wherein:
the flue gas air pipe is arranged on the side wall of the chimney (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220953343.XU CN217103618U (en) | 2022-04-24 | 2022-04-24 | Sleeve lime kiln device for reducing emission of nitrogen oxides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220953343.XU CN217103618U (en) | 2022-04-24 | 2022-04-24 | Sleeve lime kiln device for reducing emission of nitrogen oxides |
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| CN217103618U true CN217103618U (en) | 2022-08-02 |
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| CN202220953343.XU Active CN217103618U (en) | 2022-04-24 | 2022-04-24 | Sleeve lime kiln device for reducing emission of nitrogen oxides |
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| CN (1) | CN217103618U (en) |
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- 2022-04-24 CN CN202220953343.XU patent/CN217103618U/en active Active
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