CN103615892A - Decomposition furnace structure capable of reducing nitric oxide emission - Google Patents
Decomposition furnace structure capable of reducing nitric oxide emission Download PDFInfo
- Publication number
- CN103615892A CN103615892A CN201310707594.5A CN201310707594A CN103615892A CN 103615892 A CN103615892 A CN 103615892A CN 201310707594 A CN201310707594 A CN 201310707594A CN 103615892 A CN103615892 A CN 103615892A
- Authority
- CN
- China
- Prior art keywords
- heater
- tertiary air
- air introduction
- pipe
- introduction pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention relates to a decomposition furnace structure capable of reducing nitric oxide emission. The decomposition furnace structure comprises a furnace body, a kiln gas inlet arranged below the furnace body, a coal-injection pipe I installed on the furnace body and located above the kiln gas inlet, two tertiary air inlet pipelines I installed on the furnace body and located above the coal-injection pipe I, a coal-injection pipe II installed on the tertiary air inlet pipelines I and a tremie pipe I installed on the furnace body 1 and located above the coal-injection pipe II, wherein a hot kiln tail gas enters the furnace body from the kiln gas inlet at the bottom of the furnace body, the coal-injection pipes inject pulverized coal, and the pulverized coal can be effectively preheated and burnt by the kiln gas to generate anoxycausis in the furnace body so as to form a reducing atmosphere to reduce the production of NO. Tertiary air flows into the furnace body in the tertiary air inlet pipelines I to form a swirling flow field rotating from bottom to top, and the tertiary air forms a helically injected ascending gas flow field together with the kiln tail gas flow from the kiln gas inlet. Therefore, the gas flow field in the decomposition furnace is more stable, and a dilute phase region is reduced to effectively improve the working condition of the decomposition furnace.
Description
Technical field
The present invention relates to cement industry equipment technical field, be specifically related to a kind of water decomposition stove.
Background technology
Dore furnace is the visual plant of the outer precalcining system of cement kiln, is bearing the task of material calcining and carbonate decomposition, is the core position of manufacture of cement.Can dore furnace complete the task of material calcining and carbonate decomposition efficiently, and can depend primarily on material mix and can fuel completing combustion and transfer heat to rapidly material with fuel is full and uniform.And completing of these operations depends on that again in dore furnace, whether gas-solid flow field is stable to a great extent, whether spray swirl effect is superior.
Nowadays haze weather is frequent all the more, and the NOX that itself and cement industry discharge has direct relation.Fuel when high temperature and airborne N2 there is oxidation reaction, the NOX of generation is reduced preferably, with toxic emission to contaminated environment in atmosphere.
Because mostly being circular pipe centering, the introducing mode of existing dore furnace tertiary air of the same type enters stove, cause system flow field unreasonable, there is local dilute-phase zone, the mutual impact pressure loss of air-flow is serious, impact spray swirl effect, in addition, though coal injection pipe setting position can guarantee the completing combustion of fuel, but produce more NOX, irreducible NOX discharge.
Summary of the invention
The present invention, in order to overcome the deficiency of above technology, provides the decomposition furnace structure of low nitrogen oxide discharge in a kind of cement manufacture plant.
The present invention overcomes the technical scheme that its technical problem adopts:
The decomposition furnace structure of this low-nitrogen oxide discharging, comprise body of heater, be arranged at the kiln gas entrance of body of heater below, be installed on body of heater and be positioned at the coal injection pipe I of kiln gas entrance top, be installed on body of heater and be positioned at two tertiary air introduction pipeline I of coal injection pipe I top, be installed on the coal injection pipe II in tertiary air introduction pipeline I and be installed on body of heater 1 and be positioned at the tremie pipe I of coal injection pipe II top, described two tertiary air introduction pipeline I mouth of pipe I are pentagonal configuration, described each tertiary air introduction pipeline I in the vertical direction around body of heater outer surface from bottom to top along forming scroll casing shape structure on body of heater along holding clockwise or to be counterclockwise fixed on, the height of the air intake vent I that described tertiary air introduction pipeline I tail end and body of heater junction form is higher than the height of mouth of pipe I.
In order to improve spray turn power, also comprise and be installed on body of heater and be positioned at two tertiary air introduction pipeline II of tremie pipe I top and be installed on body of heater and be positioned at the tremie pipe II of tertiary air introduction pipeline II top, the mouth of pipe II of described two tertiary air introduction pipeline II is pentagonal configuration, described each tertiary air introduction pipeline II in the vertical direction forms scroll casing shape structure along holding clockwise or to be counterclockwise fixed on from bottom to top around body of heater outer surface on body of heater, the height of the air intake vent II that described tertiary air introduction pipeline II tail end and body of heater junction form is higher than the height of mouth of pipe II.
The invention has the beneficial effects as follows: kiln tail hot gas enters in body of heater from the kiln gas entrance of bottom of furnace body, coal injection pipe sprays coal dust and can effectively utilize kiln gas preheating coal dust and make it burning, makes anoxycausis in body of heater, forms reducing atmosphere, reduces NO
produce.Tertiary air flows in body of heater and can form the eddy flow field of rotation from bottom to top in tertiary air introduction pipeline I, itself and from the air-flow of the kiln tail in kiln gas entrance, jointly form the gas flowfield that churning is risen.Therefore in dore furnace, gas flowfield is more stable, has reduced dilute-phase zone, effectively improves the operating mode of dore furnace.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is that A-A in Fig. 1 is to cross-sectional view;
In figure, 1. body of heater 2. coal injection pipe I 3. kiln gas entrance 4. tertiary air introduction pipeline I 5. mouth of pipe I 6. coal injection pipe II 7. tremie pipe I 8. tertiary air introduction pipeline II 9. mouth of pipe II 10. tremie pipe II.
The specific embodiment
Below in conjunction with accompanying drawing 1, the present invention will be further described for accompanying drawing 2.
The decomposition furnace structure of this low-nitrogen oxide discharging, comprise body of heater 1, be arranged at the kiln gas entrance 3 of body of heater 1 below, be installed on body of heater 1 and be positioned at the coal injection pipe I 2 of kiln gas entrance 3 tops, be installed on body of heater 1 and be positioned at two tertiary air introduction pipeline I 4 of coal injection pipe I 2 tops, be installed on the coal injection pipe II 6 in tertiary air introduction pipeline I 4 and be installed on body of heater 1 and be positioned at the tremie pipe I 7 of coal injection pipe II 6 tops, two tertiary air introduction pipeline I 4 mouth of pipe I 5 are pentagonal configuration, each tertiary air introduction pipeline I 4 in the vertical direction around body of heater 1 outer surface from bottom to top along forming scroll casing shape structure on body of heater 1 along holding clockwise or to be counterclockwise fixed on, the height of the air intake vent I that tertiary air introduction pipeline I 4 tail ends and body of heater 1 junction form is higher than the height of mouth of pipe I 5.Kiln tail hot gas enters in body of heater 1 from the kiln gas entrance 3 of body of heater 1 bottom, and coal injection pipe I 2 injection coal dusts can effectively utilize kiln gas preheating coal dust and make it burning, make anoxycausis in body of heater, form reducing atmosphere, reduce NO
produce, tertiary air utilizes tertiary air introduction pipeline I 4 to enter in body of heater 1, due to two tertiary air introduction pipeline I 4 from bottom to top spiral surrounding in body of heater 1 outside, therefore tertiary air flows in tertiary air introduction pipeline I 4 that body of heater 1 is interior can form the eddy flow field of rotation from bottom to top, itself and from the air-flow of the kiln tail in kiln gas entrance 3, jointly form the gas flowfield that churning is risen.Mouth of pipe I 5 adopts pentagonal configuration, and object is to make to guide the air-flow generation deflection entering to move to reduce resistance, meanwhile, for reducing resistance, suitably reduces import wind speed, and the liquid collision of porch, extrusion effect are obviously weakened.And the speed of traditional round entrance structure centre place air-flow is maximum, the liquid collision that enters the rotation of scroll casing shape structure is serious, and resistance is larger, and loss is serious.Coal injection pipe II 6 is arranged in tertiary air introduction pipeline I 4, has guaranteed the completing combustion of coal dust, and heat is brought in body of heater 1 with air-flow, dispersed, for dore furnace provides good temperature field.The decomposition furnace structure of this low-nitrogen oxide discharging effectively reduces NO
generation, in addition due to tertiary air for spray precession enter, so dore furnace in gas flowfield more stable, reduced dilute-phase zone, effectively improve the operating mode of dore furnace.
Also comprise and be installed on body of heater 1 and be positioned at two tertiary air introduction pipeline II 8 of tremie pipe I 7 tops and be installed on body of heater 1 and be positioned at the tremie pipe II 10 of tertiary air introduction pipeline II 8 tops, the mouth of pipe II 9 of two tertiary air introduction pipeline II 8 is pentagonal configuration, each tertiary air introduction pipeline II 8 in the vertical direction forms scroll casing shape structure along holding clockwise or to be counterclockwise fixed on from bottom to top around body of heater 1 outer surface on body of heater 1, the height of the air intake vent II that tertiary air introduction pipeline II 8 tail ends and body of heater 1 junction form is higher than the height of mouth of pipe II 9.Tertiary air can also enter in body of heater 1 by tertiary air introduction pipeline II 8, due to two tertiary air introduction pipeline II 8 from bottom to top spiral surrounding in body of heater 1 outside, therefore tertiary air flows into the interior meeting of body of heater 1 and forms the eddy flow field of rotation from bottom to top in tertiary air introduction pipeline II 8, itself and the air-flow spraying in road 1 from two of bottoms tertiary air introduction pipeline I 4 superpose, common formation sprayed the gas flowfield that screws on liter, for spray, revolve power is provided again, neither change the direction of motion of air-flow, also can avoid tertiary air mutually to collide the pressure loss causing, further improved result of use.
Claims (2)
1. the decomposition furnace structure of a low-nitrogen oxide discharging, it is characterized in that: comprise body of heater (1), be arranged at the kiln gas entrance (3) of body of heater (1) below, be installed on body of heater (1) and go up and be positioned at the coal injection pipe I (2) of kiln gas entrance (3) top, be installed on body of heater (1) and go up and be positioned at two tertiary air introduction pipeline I (4) of coal injection pipe I (2) top, be installed on the coal injection pipe II (6) in tertiary air introduction pipeline I (4) and be installed on the tremie pipe I (7) that coal injection pipe II (6) top was gone up and be positioned to body of heater (1), described two tertiary air introduction pipeline I (4) mouth of pipe I (5) are pentagonal configuration, described each tertiary air introduction pipeline I (4) in the vertical direction holds clockwise or counterclockwise along edge from bottom to top and is fixed on the upper scroll casing shape structure that forms of body of heater (1) around body of heater (1) outer surface, the height of the air intake vent I that described tertiary air introduction pipeline I (4) tail end and body of heater (1) junction form is higher than the height of mouth of pipe I (5).
2. the decomposition furnace structure of low-nitrogen oxide discharging according to claim 1, it is characterized in that: also comprise and be installed on body of heater (1) and be positioned at two tertiary air introduction pipeline II (8) of tremie pipe I (7) top and be installed on the tremie pipe II (10) that tertiary air introduction pipeline II (8) top was gone up and be positioned to body of heater (1), the mouth of pipe II (9) of described two tertiary air introduction pipeline II (8) is pentagonal configuration, described each tertiary air introduction pipeline II (8) in the vertical direction is fixed on the upper scroll casing shape structure that forms of body of heater (1) along holding clockwise or counterclockwise from bottom to top around body of heater (1) outer surface, the height of the air intake vent II that described tertiary air introduction pipeline II (8) tail end and body of heater (1) junction form is higher than the height of mouth of pipe II (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310707594.5A CN103615892A (en) | 2013-12-20 | 2013-12-20 | Decomposition furnace structure capable of reducing nitric oxide emission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310707594.5A CN103615892A (en) | 2013-12-20 | 2013-12-20 | Decomposition furnace structure capable of reducing nitric oxide emission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103615892A true CN103615892A (en) | 2014-03-05 |
Family
ID=50166599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310707594.5A Pending CN103615892A (en) | 2013-12-20 | 2013-12-20 | Decomposition furnace structure capable of reducing nitric oxide emission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103615892A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115371416A (en) * | 2022-08-17 | 2022-11-22 | 中材建设有限公司 | Novel cement clinker calcining and decomposing furnace |
-
2013
- 2013-12-20 CN CN201310707594.5A patent/CN103615892A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115371416A (en) * | 2022-08-17 | 2022-11-22 | 中材建设有限公司 | Novel cement clinker calcining and decomposing furnace |
| WO2024012181A1 (en) * | 2022-08-17 | 2024-01-18 | 中材建设有限公司 | New cement clinker calcination decomposition furnace |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106642114B (en) | It is a kind of with pipette tips from the ultra-low nitrogen volumetric combustion device of smooth combustion apparatus | |
| CN107606606B (en) | Central powder feeding omega-shaped industrial pulverized coal boiler adopting flue gas recirculation | |
| CN204141575U (en) | Be applicable to the coal burner nozzle being with minor air cell's cement decomposing furnace fuel-staged combustion | |
| CN106051769B (en) | A kind of new and effective ultra-low nitrogen volumetric combustion device | |
| CN204165044U (en) | The premixed coal dust low NO of a kind of adverse current | |
| CN107559858B (en) | Turbulent burner W flame boiler with interior straight outward turning ammonia-gas spraying device | |
| CN104713347B (en) | Air-distributed combustion device achieving efficient combustion and low NOX emission of cement decomposing furnace | |
| CN105879645A (en) | Turbulent tube grid tower capable of improving desulfurization efficiency | |
| CN203904380U (en) | Rotational flow injection air mixing device | |
| CN107559819A (en) | A kind of spiral-flow powdered coal burning mechanism that gradually expanded form precombustion chamber is carried for Industrial Boiler | |
| CN106178907A (en) | A kind of CFBB ultra-fine desulfurizer granule sulfur method | |
| CN203629297U (en) | Decomposing furnace structure for low-nitrogen oxide emission | |
| CN201582822U (en) | Concentric type axial rotational flow burner adopting high-temperature air combustion technology for industrial furnace | |
| CN103615892A (en) | Decomposition furnace structure capable of reducing nitric oxide emission | |
| CN104713360B (en) | Decomposing furnace based on stepped combustion and emission reduction NOx technology and control method thereof | |
| CN109631020A (en) | Combine denitrification apparatus in a kind of full load furnace suitable for industrial coal powder boiler | |
| CN205825031U (en) | A kind of new and effective ultra-low nitrogen body burner | |
| CN205782858U (en) | A kind of cyclone gasification burning premix burner | |
| CN202885504U (en) | Kiln ring-directional air-distribution facility | |
| CN205537154U (en) | Gas mixer | |
| CN211694879U (en) | Low-nitrogen gas burner suitable for medium-low heat value fuel | |
| CN101852434A (en) | Cyclone burner for high-temperature air burning industrial furnace | |
| CN203744715U (en) | Staged burning decomposing furnace | |
| CN208332262U (en) | Low nitrogen burner | |
| CN205137443U (en) | Whirl atomizing pre -burning type heavy oil burner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140305 |
|
| WD01 | Invention patent application deemed withdrawn after publication |