CN215742707U - Dry-process DSNCR denitration device suitable for carbon calciner - Google Patents
Dry-process DSNCR denitration device suitable for carbon calciner Download PDFInfo
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- CN215742707U CN215742707U CN202122347477.5U CN202122347477U CN215742707U CN 215742707 U CN215742707 U CN 215742707U CN 202122347477 U CN202122347477 U CN 202122347477U CN 215742707 U CN215742707 U CN 215742707U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a dry-method DSNCR denitration device suitable for a carbon calciner, which comprises a calciner (1), a particle bin (2), a metering and blanking mechanism (4), a dry material ejector (5), a spray gun (6), a waste heat boiler (7) and a desulfurization mechanism (10), wherein the calciner (1) is connected with the waste heat boiler (7) through a high-temperature flue (3); the metering and blanking mechanism (4) is arranged at the bottom of the particle bin (2), the bottom of the metering and blanking mechanism (4) is connected with the dry material ejector (5), the bottom of the dry material ejector (5) is connected with the spray gun (6), and the bottom of the spray gun (6) is connected with the high-temperature flue (3); the waste heat boiler (7) is connected with the desulfurization mechanism (10) through a low-temperature flue (9), and the desulfurization mechanism (10) is connected with the chimney (11) through a pipeline. The utility model has high denitration efficiency, no blockage of the flue, safety and reliability.
Description
Technical Field
The utility model belongs to the technical field of flue gas denitration, and particularly relates to a dry-method DSNCR denitration device suitable for a carbon calciner.
Background
In the production process of the carbon calciner, the calcination temperature needs to be controlled at 1250-x. NO required in ultralow emission standard of Ministry of environmental protectionxThe concentration is not more than 50mg/m3In the prior art, most calcinators cannot meet the emission requirement and need denitration treatment.
The first one is SCR method, the SCR denitration device needs to modify a waste heat boiler, or the flue gas temperature is adjusted by adjusting the energy production of the waste heat boiler so as to adapt to the temperature interval of 300-400 ℃ needed by SCR denitration. The denitration agent is ammonia water or urea hydrolysis solution sprayed in front of the SCR reactor. The SCR denitration device sprays liquid reducing agent, the dust content of the smoke is large, the smoke channel can be blocked in use, and the negative pressure of the smoke channel is reduced, so that the production of a calcining furnace is influenced. The second one is SNCR denitration device, the SNCR denitration device directly sprays ammonia water or urea hydrolysis solution into the flue of the calcining furnace, ammonia realizes denitration under the condition of 800-.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a dry-method DSNCR denitration device which is high in denitration efficiency, does not block a flue and is safe and suitable for a carbon calciner.
The utility model adopts the following technical scheme:
the dry DSNCR denitration device suitable for the carbon calciner is characterized by comprising a calciner (1), a particle bin (2), a metering and blanking mechanism (4), a dry material ejector (5), a spray gun (6), a waste heat boiler (7) and a desulfurization mechanism (10), wherein the calciner (1) is connected with the waste heat boiler (7) through a high-temperature flue (3); the metering and blanking mechanism (4) is arranged at the bottom of the particle bin (2), the bottom of the metering and blanking mechanism (4) is connected with the dry material ejector (5), the bottom of the dry material ejector (5) is connected with the spray gun (6), and the bottom of the spray gun (6) is connected with the high-temperature flue (3); the waste heat boiler (7) is connected with the desulfurization mechanism (10) through a low-temperature flue (9), and the desulfurization mechanism (10) is connected with the chimney (11) through a pipeline.
The dry DSNCR denitration device suitable for the carbon calciner is characterized in that a vibration screen component (14) is installed in the particle bin (2); the vibrating screen assembly (14) comprises a pneumatic vibrator (141), a connecting rod (142), a screen (143) and a material breaking rod (144), the connecting rod (142) comprises a transverse connecting rod, a vertical connecting rod and an inclined connecting rod, the transverse connecting rod is connected with the vertical connecting rod, the pneumatic vibrator (141) is connected with the transverse connecting rod, the lower portion of the vertical connecting rod is connected with the material breaking rod (144), the material breaking rod (144) penetrates through the screen (143), and the screen (143) is connected with the vertical connecting rod through the inclined connecting rod.
The dry DSNCR denitration device suitable for the carbon calciner is characterized in that a denitration reducing agent is placed in the particle bin (2).
According to the dry-method DSNCR denitration device suitable for the carbon calciner, the denitration reducing agent is urea dry particles.
The dry DSNCR denitration device suitable for the carbon calciner is characterized in that the chimney (11) is provided with a CEMS (8), and the CEMS (8) is related to the feeding amount of the metering and blanking mechanism (4).
The dry DSNCR denitration device suitable for the carbon calciner is characterized in that the metering and blanking mechanism (4) is driven by a stepping motor (12).
The dry DSNCR denitration device suitable for the carbon calciner is characterized in that the dry material ejector (5) is driven by compressed air, and the outlet of the dry material ejector (5) is positive pressure.
The dry DSNCR denitration device suitable for the carbon calciner is characterized in that the bottom of the metering blanking mechanism (4) is connected with the dry material ejector (5) through a blanking pipe, and the blanking pipe is provided with a vent hole (13).
The utility model has the beneficial technical effects that: the utility model is one of SNCR, and the denitrifier used is urea dry particles, so the dry DSNCR denitration method is defined. The device uses dry urea particles to carry out denitration, and the reaction position is in an outlet flue (3) of a calcining furnace; and (4) after denitration of the carbon calciner flue gas, the flue gas passes through a waste heat boiler and a desulphurization device and is discharged from a chimney. The utility model is a dry DSNCR denitration process, and has high denitration efficiency; the dry DSNCR denitration device has no moisture entering the flue, and can improve the heat utilization rate. Compared with the existing denitration device, the utility model has the advantages of higher denitration efficiency of the carbon calciner, no blockage of a flue and higher safety.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a metering blanking mechanism and a dry material injector;
FIG. 3 is a schematic view of the construction of a shaker assembly of the present invention.
Detailed Description
Referring to fig. 1-3, the dry-method DSNCR denitration device suitable for the carbon calciner of the utility model comprises a calciner 1, a particle bin 2, a metering and blanking mechanism 4, a dry material injector 5, a spray gun 6, a waste heat boiler 7 and a desulfurization mechanism 10, wherein the calciner 1 is connected with the waste heat boiler 7 through a high-temperature flue 3; the metering and blanking mechanism 4 is arranged at the bottom of the particle bin 2, the bottom of the metering and blanking mechanism 4 is connected with the dry material injector 5, the bottom of the dry material injector 5 is connected with the spray gun 6, and the bottom of the spray gun 6 is connected with the high-temperature flue 3; the waste heat boiler 7 is connected with the desulfurization mechanism 10 through a low-temperature flue 9, and the desulfurization mechanism 10 is connected with a chimney 11 through a pipeline. A vibration screen assembly 14 is arranged in the particle bin 2; the vibrating screen assembly 14 comprises a pneumatic vibrator 141, a connecting rod 142, a screen 143 and a material breaking rod 144, wherein the connecting rod 142 comprises a transverse connecting rod, a vertical connecting rod and an inclined connecting rod, the transverse connecting rod is connected with the vertical connecting rod, and preferably, the transverse connecting rod is vertically connected with the vertical connecting rod. The pneumatic vibrator 141 is connected with the transverse connecting rod, the lower part of the vertical connecting rod is connected with the material breaking rod 144, the material breaking rod 144 penetrates through the screen 143, the screen 143 is connected with the vertical connecting rod through the inclined connecting rod, and the screen 143 is perpendicular to the material breaking rod 144 and the vertical connecting rod. Preferably, the number of the diagonal links is 2. The pneumatic vibrator 141 transmits a vibration source to the screen 143 through a transverse connecting rod and a vertical connecting rod, and the screen 143 is suspended in the granular materials through an inclined connecting rod.
Denitration reductant urea dry particles are placed in the particle bin 2. The chimney 11 is provided with a CEMS8, and a CEMS8 is related to the feeding amount of the metering and blanking mechanism 4. The metering and blanking mechanism 4 is driven using a stepper motor 12. The dry material ejector 5 is driven by compressed air, and the outlet of the dry material ejector 5 is in positive pressure. The bottom of the metering blanking mechanism 4 is connected with the dry material ejector 5 through a blanking pipe, and the blanking pipe is provided with a vent hole 13. The metering and feeding mechanism 4 is used for feeding amount of the device, the feeding amount is related to CEMS8, and the spraying amount of the dry urea particles is automatically adjusted according to the value of CEMS 8.
The flue gas generated by the calcining furnace 1 enters a waste heat boiler 7 through a high-temperature flue 3, the outlet flue gas of the waste heat boiler 7 enters a desulfurization mechanism 10, and the clean flue gas is discharged through a chimney 11. The dry DSNCR denitration process is carried out in the high-temperature flue 3, dry urea particles are stored in the particle bin 2, quantitative blanking is carried out through the metering blanking mechanism 4, and the dry urea particles enter the dry material injector 5 and are injected into the high-temperature flue 3 through the spray gun 6. The amount of injected dry urea particles was 120% of the mass of NOx. Each spray gun 6 corresponds to a set of metering and blanking mechanism 4 and a dry material injector 5, so that the material quantity of each spray gun is uniform and controllable.
The temperature in the high-temperature flue 3 is 850-xPerforming selective non-catalytic reduction reaction to obtain NOxReduction to N2And H2O。
The reaction process is as follows: (CH)2)CO+NOx→CO2+H2O+N2。
Claims (8)
1. The dry DSNCR denitration device suitable for the carbon calciner is characterized by comprising a calciner (1), a particle bin (2), a metering and blanking mechanism (4), a dry material ejector (5), a spray gun (6), a waste heat boiler (7) and a desulfurization mechanism (10), wherein the calciner (1) is connected with the waste heat boiler (7) through a high-temperature flue (3); the metering and blanking mechanism (4) is arranged at the bottom of the particle bin (2), the bottom of the metering and blanking mechanism (4) is connected with the dry material ejector (5), the bottom of the dry material ejector (5) is connected with the spray gun (6), and the bottom of the spray gun (6) is connected with the high-temperature flue (3); the waste heat boiler (7) is connected with the desulfurization mechanism (10) through a low-temperature flue (9), and the desulfurization mechanism (10) is connected with the chimney (11) through a pipeline.
2. The dry DSNCR denitration apparatus for a carbon calciner according to claim 1 wherein a vibrating screen assembly (14) is installed in the particle bin (2); the vibrating screen assembly (14) comprises a pneumatic vibrator (141), a connecting rod (142), a screen (143) and a material breaking rod (144), the connecting rod (142) comprises a transverse connecting rod, a vertical connecting rod and an inclined connecting rod, the transverse connecting rod is connected with the vertical connecting rod, the pneumatic vibrator (141) is connected with the transverse connecting rod, the lower portion of the vertical connecting rod is connected with the material breaking rod (144), the material breaking rod (144) penetrates through the screen (143), and the screen (143) is connected with the vertical connecting rod through the inclined connecting rod.
3. The dry DSNCR denitration device suitable for the carbon calciner according to claim 1, wherein the particle bin (2) is placed with a denitration reducing agent.
4. The dry DSNCR denitration device suitable for the carbon calciner according to claim 3, wherein the denitration reducing agent is dry urea particles.
5. The dry DSNCR denitration apparatus for a carbon calciner according to claim 1 wherein the chimney (11) is equipped with a CEMS (8), the CEMS (8) being associated with the feeding amount of the metering and blanking mechanism (4).
6. The dry-process DSNCR denitration device suitable for the carbon calciner according to claim 1, wherein the metering blanking mechanism (4) is driven by a stepping motor (12).
7. The dry DSNCR denitration device for a carbon calciner according to claim 1 wherein the dry injector (5) is driven by compressed air and the outlet of the dry injector (5) is positive pressure.
8. The dry-process DSNCR denitration device suitable for the carbon calciner according to claim 1, wherein the bottom of the metering blanking mechanism (4) is connected with the dry material ejector (5) through a blanking pipe, and the blanking pipe is provided with a vent hole (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122347477.5U CN215742707U (en) | 2021-09-27 | 2021-09-27 | Dry-process DSNCR denitration device suitable for carbon calciner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122347477.5U CN215742707U (en) | 2021-09-27 | 2021-09-27 | Dry-process DSNCR denitration device suitable for carbon calciner |
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| CN215742707U true CN215742707U (en) | 2022-02-08 |
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| CN202122347477.5U Active CN215742707U (en) | 2021-09-27 | 2021-09-27 | Dry-process DSNCR denitration device suitable for carbon calciner |
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