CN102636026A - Environment-friendly type C-KSV decomposition furnace - Google Patents
Environment-friendly type C-KSV decomposition furnace Download PDFInfo
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- CN102636026A CN102636026A CN2012100835115A CN201210083511A CN102636026A CN 102636026 A CN102636026 A CN 102636026A CN 2012100835115 A CN2012100835115 A CN 2012100835115A CN 201210083511 A CN201210083511 A CN 201210083511A CN 102636026 A CN102636026 A CN 102636026A
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Abstract
The invention discloses an environment-friendly type C-KSV decomposition furnace. The decomposition furnace (1) is provided with a mixing chamber (9), an auxiliary spouting bed (2), a cyclone chamber (3) and a spouting bed (4) from top to bottom; and the lower part of the spouting bed (4) is a high-temperature flue-gas inlet (7). Due to the adoption of the technical scheme, the structure form is reasonable, and the NOx emission concentration of a system is reduced, so that the high-efficiency and environment-friendly effects are achieved; the adaptability of the decomposition furnace to inferior anthracite is enhanced, and the adaptability to the coal quality is strong; and the operation of a firing system is more stable and reliable.
Description
Technical field
The invention belongs to the technical field of cement manufacture plant, relate to the improvement technology of clinker calcination equipment, more particularly, the present invention relates to a kind of environment-friendly type C-KSV dore furnace.
Background technology
New dry cement production technology is new developing technology the 1950's; It is a core with suspended preheater and precal cination technique (dore furnace); Adopt novel material, fuel homogenizing and energy-conservation grinding technology and equipment; Adopt computer centralized distribution control completely, realize cement production process automation and efficient, high-quality, low consumption, environmental protection.
Precal cination technique (dore furnace) is one of core technology of New Type Dry-process Cement Production; Change the raw material decomposable process in dore furnace suspended state by original stacking states in rotary kiln, improved the output that raw material are gone into kiln resolution ratio and kiln system greatly.
At present, the version kind of dore furnace is more in the world, mainly is divided into following several types according to gas motion characteristics in the dore furnace: floated, boiling type, the formula of spurting, spiral-flow type and spray suspension type.
The developing stage of growing out of nothing has been experienced in the development of Chinese cement equipment, through introducing, digest, absorb external cement equipment technology and autonomous innovation, develops China's first cover domestic equipment the 1980s.2000t/d, two cement of 4000t/d " one continuous line " project have been arranged respectively in " the Seventh Five-Year Plan ", " eight or five "; Tissue has been introduced design, the manufacturing technology of the crucial cement technical equipment of developed countries such as Germany, Denmark, the U.S., Japan; Through digesting and assimilating and develop tackling key problem, the cement in China Equipment Development has had significant progress.To the nineties, cement in China equipment industry can provide the Technology Equipment with world level to domestic and international cement construction market the sixth of the twelve Earthly Branches.
Although cement in China technology and equipment exploitation have had suitable development; The maximization of cement equipment and dialect are also progressively ripe; But still there be certain gap in the general technical level of cement in China equipment with comparing abroad; Cement production process technical indicator and environmental index still are lower than the foreign technology level, and the research and development of main firing system equipment drop into fewer and feweri.
In addition, because coal resources in China is in short supply day by day, the quality of industrial coal of cement progressively descends; The use of lambskin is more and more; But because the anthracite burning-point is high, burning velocity is slow, be prone to produce the after-combustion phenomenon, be unfavorable for the stable operation of cement producing line.
Summary of the invention
Problem to be solved by this invention provides a kind of environment-friendly type C-KSV dore furnace, its objective is the adaptability that has strengthened lambskin, has reduced the NOx concentration of emission, makes system's operation more reliable and more stable.
To achieve these goals, the technical scheme taked of the present invention is:
Environment-friendly type C-KSV dore furnace provided by the present invention, described dore furnace are respectively mixing chamber, auxiliary bed, spin chamber and the bed that spurts of spurting from top to bottom, and described bottom of spurting bed is the high-temperature flue gas import.
The described auxiliary bed that spurts connects described mixing chamber and spin chamber, and forms contraction in diametric(al).
Described spurt bed by described high-temperature flue gas import to the spin chamber direction, form the ascending tapering of diameter.
Described dore furnace is provided with two three air inlets, on the cross section of described dore furnace, by the center symmetrical distribution of described dore furnace, goes into stove from the bottom level rotary-cut of described spin chamber.
Described dore furnace is provided with three raw material imports, and one of them is located at the top of described spin chamber, in the oblique feeding stove down of tremie pipe; Two other is located at described tertiary air import department respectively, and is oblique down through tremie pipe, direction feeds the tertiary air import in stove.
Described dore furnace is provided with four coal dust spouts, wherein two be located at described spurt the bed short transverse on the middle part; Two other height with described tertiary air import is identical, and is spaced apart with the tertiary air import.
The present invention adopts technique scheme, and version is reasonable, has reduced the NOx of system concentration of emission, high-efficiency environment friendly; Strengthened the adaptability of dore furnace to lambskin, ature of coal adaptability is strong; Make the firing system operation more reliable and more stable.
Description of drawings
The mark of facing down among expressed content of each width of cloth accompanying drawing of this specification and the figure briefly explains:
Fig. 1 is decomposition furnace structure and principle schematic among the present invention;
Fig. 2 goes into stove position level face sketch map for coal powder injection pipe on the dore furnace and tertiary air;
Fig. 3 goes into stove position elevational schematic view for coal powder injection pipe on the dore furnace and tertiary air;
Fig. 4 is a dore furnace loading and unloading pipe position view;
Fig. 5 is the inner coal dust burnout rate of dore furnace, raw material resolution ratio curve map.
Be labeled as among the figure:
1, dore furnace, 2, the auxiliary bed that spurts, 3, the spin chamber, 4, the bed that spurts, 5, the raw material import, 6, the tertiary air import, 7, the high-temperature flue gas import, 8, the coal dust spout, 9, mixing chamber, 10, tremie pipe.
The specific embodiment
Contrast accompanying drawing below, through the description to embodiment, specific embodiments of the invention is done further detailed explanation, to help those skilled in the art inventive concept of the present invention, technical scheme is had more complete, accurate and deep understanding.
The of the present invention structure expressed like Fig. 1 to Fig. 4 is a kind of environment-friendly type C-KSV dore furnace.The present invention is applied to the outer precalcining system of clinker kiln.This system is mainly used in the preheating predecomposition of cement slurry, and the cement slurry after the homogenizing fully disperses back entering preheater through the material-strewing device that C2-C1 connects on the airduct, in preheater with hot gas abundant heat exchange under suspended state.To the Category Four cyclone tube, go into dore furnace 1, carbonate decomposes in a large number under 1 the hot environment in dore furnace.Material after the decomposition is gone into five-stage whirlwind tube separated and collected, then through kiln tail smoke-box feeding rotary kiln.
The present invention is based on the state of the art of this area; Utilize the computer modeling technique analysis means; The distribution of dore furnace flow field, Temperature Distribution, material distribution, coal dust firing and raw material decomposition are furtherd investigate, developed high-efficiency environment friendly, strong, stable " the low NOx environment-friendly type C-KSV dore furnace " of ature of coal adaptability.
In order to solve the problem that exists at the described present known technology of this specification background technology part and to overcome its defective, realize the foregoing invention purpose, the technical scheme that the present invention takes is:
As shown in Figure 1, environment-friendly type C-KSV dore furnace provided by the present invention, described dore furnace 1 are respectively mixing chamber 9, auxiliary bed 2, spin chamber 3 and the bed 4 that spurts of spurting from top to bottom, and described bottom of spurting bed 4 is high-temperature flue gas import 7.
The described auxiliary bed 2 that spurts connects described mixing chamber 9 and spin chamber 3, and shrinks in diametric(al) formation.
Described spurt bed 4 by described high-temperature flue gas import 7 to the spin chamber 3 directions, form the ascending tapering of diameter.
" low NOx environment-friendly type C-KSV dore furnace " provided by the invention through optimizing version, material and fuel in-position and the tertiary air enter mode and the position of dore furnace 1, reduced the NOx of system concentration of emission, high-efficiency environment friendly; Strengthened the adaptability of dore furnace to lambskin, ature of coal adaptability is strong; Make the firing system operation more reliable and more stable.
This dore furnace 1 belongs to spray and revolves the type dore furnace and be provided with three blanking points, four coal powder injection points altogether; The tertiary-air pipe of three air inlets 6 divides two parts to go into stove from the bottom level rotary-cut of dore furnace 1.It specifically is provided with as follows:
As shown in Figure 2, described dore furnace 1 is provided with two three air inlets 6, on the cross section of described dore furnace 1, by the center symmetrical distribution of described dore furnace 1, goes into stove from the bottom level rotary-cut of described spin chamber 3.
During this dore furnace 1 operation; High-temperature flue gas in the rotary kiln is through kiln tail uptake flue, upwards gets into dore furnace 1 by the high-temperature flue gas import 7 of furnace bottom reducing, forms the effect of spurting; Also be that the decomposition of coal powder ignition and raw material provides a part of heat; Tertiary air gets into dore furnace 1 through the tertiary-air pipe of two levels, forms cyclonic effect, and tertiary air almost provides the required whole oxygen of coal dust firing in the dore furnace 1.
Like Fig. 3 and shown in Figure 4, described dore furnace 1 is provided with three raw material imports 5, and one of them is located at the top of described spin chamber 3, in tremie pipe 10 oblique feeding stoves down; Two other is located at described tertiary air import 6 places respectively, through tremie pipe 10 oblique following, direction feeding tertiary air imports 6 in stove.
As shown in Figure 4; In preheater, be preheated to the raw material about 700 ℃, get into dore furnaces 1, in stove, spread out soon under eddy flow and the double action of spurting by C4 raw material tremie pipe 10; Fully mix and absorb coal dust firing institute liberated heat with the coal dust of burning, reach the purpose of decomposition.
As shown in Figures 2 and 3, dore furnace 1 is provided with four coal dust spouts 8, wherein two middle parts that are located on described bed 4 the short transverse of spurting; Two other height with described tertiary air import 6 is identical, and is spaced apart with tertiary air import 6.
Coal dust sprays into dore furnace 1 by four coal dust spouts 8, and the injecting coal quantity of each nozzle respectively accounts for 25%, in dore furnace 1 fire burns.
The C-KSV dore furnace is used to produce daily 5000 tons of clinker production lines, adopts that multiple spot is fed coal, feeding, the middle part secondary spurts and the jet-whirl type design of stove is gone in the two-way rotary-cut of tertiary air, has following performance characteristics:
1, material distributes rationally: the combined-flow that adopts the eddy flow (tertiary air) and the stream (kiln gas) that spurts to form, and material dispersed has been strengthened in the reasonable cooperation of the two intensity;
2, the temperature field distributes rationally: a part of material gets in the stove with tertiary air and forms eddy flow, under centrifugal action, concentrates to dore furnace 1 limit wall gradually, prevents that the wall environment temperature is too high, and makes the central area temperature higher relatively, helps the conflagration of coal dust;
3, the raw material resolution ratio is high: as shown in Figure 5, the material mean residence time went out dore furnace raw material resolution ratio and reaches more than 90% about 9.2 seconds;
4, the coal dust burnout rate is high: as shown in Figure 5, coal dust is the burning at dore furnace 1 middle part mainly, and this zone material concentration is low, helps the conflagration of coal dust.The dore furnace heat size reaches 1560m
3, the combustion space is sufficient, and burnout rate is high, does not have the after-combustion phenomenon;
5, ature of coal adaptability is strong: 4 of the double-deck symmetries of single channel are fed coal, can regulate the feeding position and the feed quantity of coal dust according to the ature of coal situation, have strengthened the adaptability to colm;
6, the NOx discharging is low: in the middle part of furnace bottom spurts bed, be provided with fuel nozzle, the coal dust that sprays into burns under hypoxia, forms reducing atmosphere, with the NOx partial reduction in the kiln gas.When N content in the fuel＜1%, can make C1 outlet NOx concentration of emission≤350mg/Nm
3(hygrometric state, O
2Content 10%).
Table one: use low NOx environment-friendly type C-KSV dore furnace clinker production line C1 outlet NOx concentration
Combine accompanying drawing that the present invention has been carried out exemplary description above; Obviously the concrete realization of the present invention does not receive the restriction of aforesaid way; As long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; Or design of the present invention and technical scheme are directly applied to other occasion without improving, all within protection scope of the present invention.
Claims (6)
1. environment-friendly type C-KSV dore furnace is characterized in that: described dore furnace (1) is respectively mixing chamber (9), auxiliary bed (2), spin chamber (3) and the bed (4) that spurts of spurting from top to bottom, and a described bottom of spurting bed (4) is high-temperature flue gas import (7).
2. according to the described environment-friendly type C-KSV dore furnace of claim 1, it is characterized in that: the described auxiliary bed (2) that spurts connects described mixing chamber (9) and spin chamber (3), and forms contraction in diametric(al).
3. according to the described environment-friendly type C-KSV dore furnace of claim 1, it is characterized in that: described spurt bed (4) by described high-temperature flue gas import (7) to the spin chamber (3) direction, form the ascending tapering of diameter.
4. according to claim 1 or 2 or 3 described environment-friendly type C-KSV dore furnaces; It is characterized in that: described dore furnace (1) is provided with two three air inlets (6); On the cross section of described dore furnace (1); Center by described dore furnace (1) is symmetrically distributed, and goes into stove from the bottom level rotary-cut of described spin chamber (3).
5. according to the described environment-friendly type C-KSV dore furnace of claim 4, it is characterized in that: described dore furnace (1) is provided with three raw material imports (5), and one of them is located at the top of described spin chamber (3), in the oblique feeding stove down of tremie pipe (10); Two other is located at described tertiary air import (6) respectively and locates,, to stove in direction feeding tertiary air import (6) oblique down through tremie pipe (10).
6. according to the described environment-friendly type C-KSV dore furnace of claim 4, it is characterized in that: described dore furnace (1) is provided with four coal dust spouts (8), wherein two be located at described spurt the bed (4) short transverse on the middle part; Two other height with described tertiary air import (6) is identical, and is spaced apart with tertiary air import (6).
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997688A (en) * | 2012-12-27 | 2013-03-27 | 天津水泥工业设计研究院有限公司 | Spouting type heat exchange air pipe used for cyclone preheater |
| CN104692683A (en) * | 2015-03-17 | 2015-06-10 | 武汉理工大学 | Decomposing furnace based on multi-fuel injection technology |
| CN105509469A (en) * | 2016-01-04 | 2016-04-20 | 天津中材工程研究中心有限公司 | Low-oxynitride decomposition furnace with precombustion furnace |
| CN106152774A (en) * | 2015-08-11 | 2016-11-23 | 甘肃土木工程科学研究院 | A kind of spray rotation superposition multiple spot supplied materials recirculation type dore furnace |
| CN113294784A (en) * | 2021-05-25 | 2021-08-24 | 中国华能集团清洁能源技术研究院有限公司 | Rotary cement kiln system for disposing waste fan blades and working method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997688A (en) * | 2012-12-27 | 2013-03-27 | 天津水泥工业设计研究院有限公司 | Spouting type heat exchange air pipe used for cyclone preheater |
| CN104692683A (en) * | 2015-03-17 | 2015-06-10 | 武汉理工大学 | Decomposing furnace based on multi-fuel injection technology |
| CN106152774A (en) * | 2015-08-11 | 2016-11-23 | 甘肃土木工程科学研究院 | A kind of spray rotation superposition multiple spot supplied materials recirculation type dore furnace |
| CN106152774B (en) * | 2015-08-11 | 2018-02-09 | 甘肃土木工程科学研究院 | One kind spray rotation superposition multiple spot supplied materials recirculation type dore furnace |
| CN105509469A (en) * | 2016-01-04 | 2016-04-20 | 天津中材工程研究中心有限公司 | Low-oxynitride decomposition furnace with precombustion furnace |
| CN113294784A (en) * | 2021-05-25 | 2021-08-24 | 中国华能集团清洁能源技术研究院有限公司 | Rotary cement kiln system for disposing waste fan blades and working method thereof |
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Application publication date: 20120815 |