CN104548916A - Rotary kiln denitration indoor spray gun embedding device and denitration method thereof - Google Patents
Rotary kiln denitration indoor spray gun embedding device and denitration method thereof Download PDFInfo
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- CN104548916A CN104548916A CN201510025228.0A CN201510025228A CN104548916A CN 104548916 A CN104548916 A CN 104548916A CN 201510025228 A CN201510025228 A CN 201510025228A CN 104548916 A CN104548916 A CN 104548916A
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- spray gun
- kiln body
- denitration
- kiln
- rotary kiln
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Abstract
The invention discloses a rotary kiln denitration indoor spray gun embedding device and a denitration method thereof. At least two annular clamping grooves are formed in a kiln body; supporting wheels matched with the annular clamping grooves are arranged on a supporting seat so as to support the kiln body; a spray gun is arranged along the central axis of the kiln body; the spray is arranged along the central axis of the kiln body by virtue of a rotating bracket fixed inside the kiln body; a spray gun pipeline positioned outside the kiln body is fixedly arranged at the tail part of the kiln body by virtue of a fixing rack; the nozzle of the spray gun is embedded in a temperature interval of 850 to 1050 DEG C in the rotary kiln; a denitration reducing agent solution is atomized to be sprayed into the kiln body by virtue of the spray gun under the action of compressed air; and the denitration reducing agent solution is urea solution and ammonia water, the denitration reducing agent solution reacts with NOx so as to generate nitrogen and water. The process is simple, the denitration efficiency is high, pollution-free nitrogen and water are generated, and the environmental pollution and injuries of human body caused by the NOx are avoided.
Description
Technical field
The present invention relates to rotary kiln technical field, be specially spray gun implanted device and method of denitration thereof in a kind of rotary kiln denitration chamber.
Background technology
Rotary kiln is the important Thermal Equipment of alumina producer, cement plant and other chemical metallurgy, because rotary kiln is in rotation status all the time, cannot realize so implant spray gun on kiln body, national environmental protection policy and discharge standard are day by day severe, require to remove the NOx in flue gas, but traditional denitrating technique cannot be implemented, in flue gas, NOx cannot obtain direct exhaust emission environment of degrading.
Nitrogen oxide is nitrous oxide (N
2o), nitric oxide (NO), nitrogen trioxide (N
2o
3), nitrogen dioxide (NO
2), dinitrogen tetroxide (N
2o
4), dinitrogen pentoxide (N
2o
5) etc. the general name of various forms of compounds that combines of nitrogen and oxygen, be called for short (NO
x), belong to greenhouse gases, most nitrogen oxide has harm to human body.Cement industry is the rich and influential family of NOx emission among each department of national economy, therefore for cement industry, administers NOx and pollutes the significance having more protection of the environment.
Summary of the invention
The object of the present invention is to provide spray gun implanted device and method of denitration thereof in a kind of rotary kiln denitration chamber, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme: spray gun implanted device in a kind of rotary kiln denitration chamber, comprise kiln body, support the supporting seat of kiln body, be arranged in kiln body afterbody inner chamber and be provided with spray gun, kiln body is provided with at least two annular slots, supporting seat is provided with the support roller that matches with annular slot to support kiln body, spray gun is arranged along the central axis place of kiln body, spray gun is by being fixed on the runing rest of kiln body inside, runing rest is arranged along kiln body center line axis, is positioned at the external spray gun pipeline of kiln and is fixed on kiln body afterbody by fixed mount.
Preferably, kiln body is provided with the bearing groove rotated for runing rest, is provided with the clutch shaft bearing connecting runing rest and kiln body in bearing groove.
Preferably, spray gun is fixedly connected with runing rest.
Preferably, runing rest adopts heat resistant and wear resistant material to be made.
Preferably, clutch shaft bearing adopts thyrite with no pressure to be made, and clutch shaft bearing is provided with the first dustproof gland.
Preferably, the junction of spray gun and runing rest is provided with the second bearing, and the second bearing is provided with the second dustproof gland.
The method of denitration of spray gun implanted device in a kind of rotary kiln denitration chamber, spray gun spray nozzle is inserted in rotary kiln, denitrification reducing agent is filled with in spray gun, spray gun spray nozzle to be implanted in kiln body in 850-1050 DEG C of temperature range, denitrification reducing agent solution adopts urea liquid, concentration is 20-25% ammoniacal liquor, denitrification reducing agent solution is atomized by spray gun and sprays in kiln body under compressed-air actuated effect, denitrification reducing agent solution and NO
xreact, the nitrogen of generation and water, its chemical equation is as follows:
CO(NH
2)
2+H
2O→CO
2+2NH
3
4NO+4NH
3+O
2→4N
2+6H
2O
6NO+4NH
3→5N
2+6H
2O
6NO
2+8NH
3→7N
2+12H
2O
2NO
2+4NH
3+O
2→3N
2+6H
2O
Preferably, in low concentration ammoniacal liquor, the escape amount of ammonia is no more than 8ppm.
Spray gun implanted device and method of denitration thereof in a kind of rotary kiln denitration chamber provided by the invention, adopt rotatable kiln body and fixed spray gun, realize at kiln et al. Ke spray gun, thus in kiln body, spray into denitrification reducing agent by spray gun, make the NO in denitrification reducing agent and kiln body
xreact, technique is simple, not only saved energy use, the quality of material that improve production efficiency He fire, and denitration efficiency is high, and generates non-harmful nitrogen and water, avoid NO
xthe environmental pollution caused and the infringement to human body.
Accompanying drawing explanation
Fig. 1 is the structural representation of kiln body of the present invention.
Fig. 2 is the cross section structure schematic diagram at Figure 1A place of the present invention.
Fig. 3 is the stereogram of Fig. 2 of the present invention.
In figure: 1-kiln body, 2-gear, 3-cooling cylinder, 4-spray gun, 5-support roller, 6-gear support roller, 7-gearbox, 8-motor, 9-smoke-box, 10-feeding hopper, 11-material outlet, 12-Pulverized Coal Bin, 13-support, 14-air blast, 15-coal injection pipe, 41-gun body, 42-fixed mount, 43 runing rests.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1-3, the invention provides a kind of technical scheme: a kind of energy-conservation rotary kiln, comprise kiln body 1, cooling cylinder 3, spray gun 4, support roller 5, gear support roller 6, gearbox 7, motor 8, smoke-box 9, feeding hopper 10, material outlet 11, Pulverized Coal Bin 12 and air blast 14, kiln body 1 outside in the centre position of kiln body 1 is provided with a circle gear 2, the bottom cooperation of gear 2 is provided with gear support roller 6, gear support roller 6 is by gearbox 7 gear connecting motor 8, the lateral surface of gear 2 both sides kiln body 1 is arranged with four draw-in grooves, support roller 5 is installed below draw-in groove and supports kiln body 1, the head of kiln body 1 is provided with one group of cooling cylinder 3, cooling cylinder 3 encloses around one in kiln body 1 head discs, the head side of kiln body 1 is provided with Pulverized Coal Bin 12, Pulverized Coal Bin 12 is arranged on the base of storehouse by support 13, storehouse base leaves material outlet 11, storehouse base is provided with air blast 14, air blast 14 connects Pulverized Coal Bin 12 and kiln body 1 head cavity, the afterbody of kiln body 1 is connected with smoke-box 9, smoke-box 9 is provided with feeding hopper 10, spray gun 41 is provided with in kiln body 1 afterbody inner chamber, spray gun 41 is arranged along the central axis place of kiln body 1, spray gun 41 is fixed on and is arranged in kiln body 1 at the runing rest 43 of kiln body 1 inside, spray gun 41 pipeline be arranged in outside kiln body 1 is fixed on the smoke-box 9 of kiln body 1 afterbody by fixed mount 42.
Kiln body 1 is provided with the bearing groove rotated for runing rest 43, the clutch shaft bearing connecting runing rest 43 and kiln body 1 is provided with in bearing groove, runing rest 43 adopts thyrite with no pressure to be made, clutch shaft bearing adopts thyrite with no pressure to be made, and clutch shaft bearing is provided with the first dustproof gland, extend the service life of clutch shaft bearing.Spray gun 41 is fixedly connected with runing rest 43, and the junction of spray gun 41 and runing rest 43 is provided with the second bearing, and the second bearing is provided with the second dustproof gland, extends the service life of the second bearing.
In the present invention, all the time be in rotation status for rotary kiln, being implanted into spray gun 41 at kiln body 1 cannot realize, in conjunction with rotary kiln operating mode service condition, select from kiln body 1 afterbody implantation, lengthening gun body 41 is implanted predeterminated position in kiln body, because gun body 41 is long, considers himself intensity, in kiln body 1, afterbody installs runing rest 43 device additional, spray gun 41 end has fixed mount 42, and kiln body 1 rotates, and gun body 41 is forever static maintains static.
The method of denitration of spray gun implanted device in a kind of rotary kiln denitration chamber, spray gun 41 shower nozzle is implanted in kiln body 1, denitrification reducing agent is filled with in spray gun 41, spray gun 41 shower nozzle to be implanted in kiln body in 850-1050 DEG C of temperature range, denitrification reducing agent solution adopts urea liquid, concentration is 20-25% ammoniacal liquor, denitrification reducing agent solution is atomized by spray gun 41 and sprays in kiln body 1 under compressed-air actuated effect, denitrification reducing agent solution and NO
xreact, the nitrogen of generation and water, its chemical equation is as follows:
CO(NH
2)
2+H
2O→CO
2+2NH
3
4NO+4NH
3+O
2→4N
2+6H
2O
6NO+4NH
3→5N
2+6H
2O
6NO
2+8NH
3→7N
2+12H
2O
2NO
2+4NH
3+O
2→3N
2+6H
2O
In a particular embodiment, in low concentration ammoniacal liquor, the escape amount of ammonia is no more than 8ppm.Spray gun to be implanted in kiln body in temperature 850 ~ 1050 DEG C of intervals.The present invention sprays into denitrification reducing agent by spray gun in kiln body, makes the NO in denitrification reducing agent and kiln body
xreact, technique is simple, not only saved energy use, the quality of material that improve production efficiency He fire, and denitration efficiency is high, and generates non-harmful nitrogen and water, avoid NO
xthe environmental pollution caused and the infringement to human body.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalents thereof.
Claims (8)
1. spray gun implanted device in a rotary kiln denitration chamber, it is characterized in that: comprise kiln body (1), support the supporting seat of kiln body (1), be arranged in kiln body (1) afterbody inner chamber and be provided with spray gun (41), kiln body (1) is provided with at least two annular slots, supporting seat is provided with the support roller (5) that matches with annular slot to support kiln body (1), spray gun (41) is arranged along the central axis place of kiln body (1), spray gun (41) is by being fixed on the inner runing rest (43) of kiln body (1), runing rest (43) is arranged along the center line axis of kiln body (1), be positioned at kiln body (1) spray gun pipeline (41) outward and be fixed on rotary kiln afterbody by fixed mount (42).
2. spray gun implanted device in rotary kiln denitration chamber according to claim 1, it is characterized in that: kiln body (1) is provided with the bearing groove rotated for runing rest (43), in bearing groove, be provided with the clutch shaft bearing connecting runing rest (43) and kiln body (1).
3. spray gun implanted device in rotary kiln denitration chamber according to claim 1, is characterized in that: spray gun (41) is fixedly connected with runing rest (43).
4. spray gun implanted device in the rotary kiln denitration chamber according to claim 1 or 2 or 3, is characterized in that: runing rest (43) adopts heat resistant and wear resistant material to be made.
5. spray gun implanted device in rotary kiln denitration chamber according to claim 2, is characterized in that: clutch shaft bearing adopts thyrite with no pressure to be made, and clutch shaft bearing is provided with the first dustproof gland.
6. spray gun implanted device in rotary kiln denitration chamber according to claim 1, is characterized in that: the junction of spray gun (41) and runing rest (43) is provided with the second bearing, and the second bearing is provided with the second dustproof gland.
7. the method for denitration of spray gun implanted device in a rotary kiln denitration chamber, it is characterized in that: spray gun (41) shower nozzle is implanted in kiln body (1), spray gun is filled with denitrification reducing agent in (41), spray gun (41) shower nozzle to be implanted in kiln body in 850-1050 DEG C of temperature range, denitrification reducing agent solution adopts urea liquid, concentration is 20-25% ammoniacal liquor, denitrification reducing agent solution is atomized by spray gun (41) and sprays in kiln body (1) under compressed-air actuated effect, denitrification reducing agent solution and NO
xreact, the nitrogen of generation and water, its chemical equation is as follows:
CO(NH
2)
2+H
2O→CO
2+2NH
3
4NO+4NH
3+O
2→4N
2+6H
2O
6NO+4NH
3→5N
2+6H
2O
6NO
2+8NH
3→7N
2+12H
2O
2NO
2+4NH
3+O
2→3N
2+6H
2O 。
8. the method for denitration of spray gun implanted device in rotary kiln denitration chamber according to claim 7, is characterized in that: in low concentration ammoniacal liquor, the escape amount of ammonia is no more than 8ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510025228.0A CN104548916A (en) | 2015-01-19 | 2015-01-19 | Rotary kiln denitration indoor spray gun embedding device and denitration method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510025228.0A CN104548916A (en) | 2015-01-19 | 2015-01-19 | Rotary kiln denitration indoor spray gun embedding device and denitration method thereof |
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|---|---|
| CN104548916A true CN104548916A (en) | 2015-04-29 |
Family
ID=53066629
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|---|---|---|---|
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| CN (1) | CN104548916A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106268270A (en) * | 2016-10-21 | 2017-01-04 | 福建龙净脱硫脱硝工程有限公司 | A kind of grate kiln denitrating system |
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| JP2009156523A (en) * | 2007-12-27 | 2009-07-16 | Ube Machinery Corporation Ltd | Denitration device and method |
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| JP5100432B2 (en) * | 2008-02-15 | 2012-12-19 | 太平洋セメント株式会社 | Exhaust gas treatment method |
| CN104211215A (en) * | 2014-08-26 | 2014-12-17 | 常州大学 | Device for treating high concentration ammonia nitrogen in metallurgical wastewater by using surface active catalyst |
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-
2015
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Patent Citations (8)
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| JPH0760134A (en) * | 1993-08-27 | 1995-03-07 | Mitsubishi Heavy Ind Ltd | Method for regenerating catalyst filter |
| CN1458102A (en) * | 2003-05-27 | 2003-11-26 | 天津水泥工业设计研究院 | Method for reducing nitrogen oxide exhaust of cement kiln |
| JP2009156523A (en) * | 2007-12-27 | 2009-07-16 | Ube Machinery Corporation Ltd | Denitration device and method |
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Non-Patent Citations (1)
| Title |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106268270A (en) * | 2016-10-21 | 2017-01-04 | 福建龙净脱硫脱硝工程有限公司 | A kind of grate kiln denitrating system |
| CN106268270B (en) * | 2016-10-21 | 2023-05-16 | 福建龙净脱硫脱硝工程有限公司 | Chain grate-rotary kiln denitration system |
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Application publication date: 20150429 |
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