CN103553381B - A kind of cement slurry preheating predecomposition device and using method thereof - Google Patents
A kind of cement slurry preheating predecomposition device and using method thereof Download PDFInfo
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Abstract
The invention discloses a kind of cement slurry preheating predecomposition device and using method thereof, cement slurry preheating predecomposition device, comprise decomposing furnace, be located at smoke-box, connecting tube and secondary final stage cyclone cylinder bottom decomposing furnace, decomposing furnace comprises cylindrical shell and is located at the tapering of cylinder body bottom, tapering is provided with tertiary air entrance, also comprise: be located at the upper feed(raw material)inlet on cylindrical shell and lower feed(raw material)inlet from top to bottom successively, and be located at the upper fuel oil atomizer on tapering, middle fuel oil atomizer and lower fuel oil atomizer from top to bottom successively; Secondary final stage cyclone cylinder is communicated with lower feed(raw material)inlet with upper feed(raw material)inlet by connecting tube.Cement slurry preheating predecomposition device of the present invention effectively can realize the stability contorting of different raw material decomposition reaction and fuel combustion reaction in same decomposing furnace, enablely to be fully utilized, linear without system Coating clogging, efficiently solves the problem of the mutual interference of the burning of fuel and decomposition two reaction process of raw material.
Description
Technical field
The present invention relates to a kind of cement slurry preheating predecomposition device and using method thereof.
Background technology
In preheating, precalcining system, the main generation burning of fuel and these two principal reactions of decomposition of raw material in decomposing furnace, fuel combustion provides necessary heat to raw material decomposition.In same decomposing furnace, can two reaction process carry out smoothly on temperature and time two coordinates, depends on the situation such as sequencing, overall thermal effect, the mutual influence degree superposed that two processes occur.The physical and chemical process occurred in decomposing furnace time aerial, for specific coal, if the combustion heat release process of coal dust has precedence over the decomposition endothermic process of raw material, then reaction can be carried out smoothly; If burning of coal exothermic process lags behind the endothermic process that raw material decompose, then because the heat absorption of raw material makes envrionment temperature be difficult to the temperature condition ensureing that coal dust burns away, thus cause flame-out, certain space chemistry reaction control position measure must be taked to solve; Intersect if the exothermic process of fuel has with the decomposition endothermic process of raw material, then need to consider to take some effective measures to eliminate the mutual interference of two chemical reaction processes, to ensure carrying out smoothly of two principal reaction processes.
China's Cement industry raw material region is wide, and quality comparison is comparatively large, and the kindling temperature scope of various coal can by 250 ~ 650 DEG C, and burning temperature can by 450 ~ 950 DEG C, and initial decomposition temperature 680 ~ 740 DEG C of (mainly MgCO of raw material
3decomposition), end of a period decomposition temperature is 800 ~ 840 DEG C, as shown in Figure 1, and so large variation range, will cause the drift of physical and chemical process on locus in stove, the drift of this physical and chemical process brings many insoluble technical problems will to production operation and control.Especially in recent years along with continuous lifting and the anxiety of energy prices, low heat value and the low-volatile coal of difficult combustion are attempted and applied to new type dry kiln cement kiln in large quantities, inevitably bring many technical problems being difficult to go beyond to production process, as: coal powder ignition difficulty, carbon burning not to the utmost, the not high series of problems of system Coating clogging, quality product.Therefore, how when ensureing cement product quality, adding the application of disaster combustion hard coal and low grade coal, improving the adaptability of precalcining system, there is very important economic benefit and social value.Current solution uses the anthracitic major measure of difficult combustion to be had: 1, throw off combustion Sum decomposition district of district, namely increases the mutual interference problem that settling chamber solves burning Sum decomposition process; 2, temperature of reaction is improved; 3, strengthening difficult combustion hard coal processing fineness; Above-mentioned measure not only makes system design become complicated, and adds system resistance damage and facility investment.
Summary of the invention
The object of this invention is to provide a kind of cement slurry preheating predecomposition device and using method thereof.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is as follows:
A kind of cement slurry preheating predecomposition device, comprise decomposing furnace, be located at smoke-box, connecting tube and secondary final stage cyclone cylinder bottom decomposing furnace, decomposing furnace comprises cylindrical shell and is located at the tapering of cylinder body bottom, tapering is provided with tertiary air entrance, also comprise: be located at the upper feed(raw material)inlet on cylindrical shell and lower feed(raw material)inlet from top to bottom successively, and be located at the upper fuel oil atomizer on tapering, middle fuel oil atomizer and lower fuel oil atomizer from top to bottom successively; Secondary final stage cyclone cylinder is communicated with lower feed(raw material)inlet with upper feed(raw material)inlet by connecting tube.
Adopt said apparatus, cement slurry can be selected feeding decomposing furnace is combined from upper feed(raw material)inlet or lower feed(raw material)inlet or both according to fuel used characteristic, the characteristic of based on fuel determines the position of coal powder injection and the mode of burning simultaneously, and carry out control combustion district temperature by sub-material, the coal dust incomplete combustion that the skinning brought to prevent localized hyperthermia or low temperature cause.When the difficulty combustion hard coal using combustionvelocity slow, use lower fuel oil atomizer, and suitably reduce the raw material amount of lower feed(raw material)inlet, to improve furnace bottom temperature, realize coal dust rapid combustion; When the bituminous coal using combustionvelocity fast, use fuel oil atomizer, and suitably strengthen the raw material amount of lower feed(raw material)inlet, to keep furnace temperature in certain level, avoid local superheating.In addition, because fuel oil atomizer is placed in the mixing zone of tertiary air and kiln tail high-temperature flue gas, under strong whirlwind-effect of spurting, coal dust can be dispersed, and burn rapidly.
Upper fuel oil atomizer, middle fuel oil atomizer and lower fuel oil atomizer have two groups, and symmetry is located at the both sides of tertiary air entrance.It is above-mentioned that to be located at the upper fuel oil atomizer of tertiary air entrance the same side, middle fuel oil atomizer and lower fuel oil atomizer be one group.Adopt technique scheme can improve the controllability of device, promote the Thorough combustion of fuel further, the Coating clogging of anti-locking apparatus.
On same group, the medullary ray of fuel oil atomizer, middle fuel oil atomizer and lower fuel oil atomizer adopts the center circle of contact to arrange, and cut that circular diameter is barrel diameter 1/4 ~ 1/3, fuel sprays into direction and tertiary air rotates in the same way.Further can promote the Thorough combustion of fuel like this.
Upper feed(raw material)inlet and lower feed(raw material)inlet have two groups, and symmetry is located at the both sides of cylindrical shell.Above-mentioned be located at cylindrical shell the same side upper feed(raw material)inlet and lower feed(raw material)inlet be one group.Adopt technique scheme can improve the controllability of device, promote the decomposition of raw material further, be conducive to making full use of of energy.
Distance between upper feed(raw material)inlet and lower feed(raw material)inlet and the ratio of barrel diameter are 0.7 ~ 1.1, upper feed(raw material)inlet and lower angle between feed(raw material)inlet and cylindrical shell be 30 ~ 60 ° adjustable, lower feed(raw material)inlet and cylinder body bottom distance be 500 ~ 1500mm.Can ensure that raw material decompose and the carrying out smoothly of fuel combustion so further, thus when ensureing cement product quality, increase difficult application of firing hard coal and low grade coal, improve the adaptability of precalcining system.
Distance between upper fuel oil atomizer and middle fuel oil atomizer and the ratio of barrel diameter are 0.16 ~ 0.18; Distance between middle fuel oil atomizer and lower fuel oil atomizer and the ratio of barrel diameter are 0.16 ~ 0.18.Making full use of of the Thorough combustion of fuel and energy can be promoted so further.
Upper fuel oil atomizer, middle fuel oil atomizer and lower angle between fuel oil atomizer and tapering be 40 ~ 50 ° adjustable; Distance between upper fuel oil atomizer and top, tapering is greater than 500mm; Distance between bottom lower fuel oil atomizer and tapering is greater than 500mm.So not only the adding of fuel easily, prevent the loss of fuel, and high-octane making full use of can be carried further.
Upper feed(raw material)inlet and be provided with diffusion type material-strewing device between feed(raw material)inlet and connecting tube down.Can further improve heat exchange efficiency, strengthening material dispersion like this, prevent blocking.It is device in ZL2009203014053 that diffusion type material-strewing device is preferably the patent No..
The using method of above-mentioned cement slurry preheating predecomposition device, when fuel used temperature of initial combustion is 250 ~ 400 DEG C, when to burn temperature be 450 ~ 600 DEG C, fuel sprays into from upper fuel oil atomizer, the raw material of 80 ~ 100% feed from lower feed(raw material)inlet, and the raw material of 0% ~ 20% feed from upper feed(raw material)inlet; When fuel used temperature of initial combustion is 500 ~ 650 DEG C, when to burn temperature be 700 ~ 950 DEG C, fuel sprays into from lower fuel oil atomizer, and the raw material of 70 ~ 100% feed from upper feed(raw material)inlet, and the raw material of 0% ~ 30% feed from lower feed(raw material)inlet; When fuel used temperature of initial combustion is 400 ~ 500 DEG C, when to burn temperature be 600 ~ 700 DEG C, fuel therefrom fuel oil atomizer sprays into, and the raw material of 60 ~ 80% feed from lower feed(raw material)inlet, and the raw material of 20% ~ 40% feed from upper feed(raw material)inlet.Adopt above-mentioned using method, what can make raw material decomposition reaction and fuel combustion reaction obtains stability contorting, and energy is fully utilized, and without the phenomenon of any skinning and blocking.
The NM technology of the present invention is prior art.
Cement slurry preheating predecomposition device of the present invention effectively can realize the stability contorting of raw material decomposition reaction and fuel combustion reaction in same decomposing furnace, enablely to be fully utilized, without the phenomenon of system Coating clogging, efficiently solve the problem of the mutual interference of the burning of fuel and decomposition two reaction process of raw material; And less investment, flexible operation is easy, adaptable to raw material, fuel, has both been conducive to the stable of system operation procedure, is conducive to again reducing production energy consumption.
Accompanying drawing explanation
Fig. 1 is the thermogravimetric curve of raw material and several coal.
Fig. 2 is the structural representation of the utility model cement slurry preheating predecomposition device.
Fig. 3 is A-A place enlarged diagram in Fig. 2.
Fig. 4 is C place enlarged diagram in Fig. 2.
Fig. 5 is B-B direction view in Fig. 4.
Fig. 6 fires anthracitic cement slurry preheating predecomposition apparatus structure schematic diagram for difficulty in prior art.
In figure, 1 is upper feed(raw material)inlet; 2 is lower feed(raw material)inlet; 3 is upper fuel oil atomizer; 4 is middle fuel oil atomizer; 5 is lower fuel oil atomizer; 6 is smoke-box; 7 is tertiary air entrance; 8 is time final stage cyclone cylinder; 9 is decomposing furnace; 10 is diffusion type material-strewing device; 11 is raw material; 12 is bituminous coal; 13 is hard coal A; 14 is hard coal B; 15 is hard coal C; 16 is raw material; 17 is coal dust; 18 is tertiary air, and 19 is settling chamber.
Embodiment
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, but content of the present invention is not only confined to the following examples.
Embodiment 1
As the cement slurry preheating predecomposition device of Fig. 1-shown, comprise decomposing furnace, be located at smoke-box, connecting tube and secondary final stage cyclone cylinder bottom decomposing furnace, decomposing furnace comprises cylindrical shell and is located at the tapering of cylinder body bottom, tapering is provided with tertiary air entrance, also comprise: be located at the upper feed(raw material)inlet on cylindrical shell and lower feed(raw material)inlet from top to bottom successively, and be located at the upper fuel oil atomizer on tapering, middle fuel oil atomizer and lower fuel oil atomizer from top to bottom successively; Secondary final stage cyclone cylinder is communicated with lower feed(raw material)inlet with upper feed(raw material)inlet by connecting tube.
Upper fuel oil atomizer, middle fuel oil atomizer and lower fuel oil atomizer have two groups, symmetry is located at the both sides of tertiary air entrance, on same group, the medullary ray of fuel oil atomizer, middle fuel oil atomizer and lower fuel oil atomizer adopts the center circle of contact to arrange, cut that circular diameter is barrel diameter 1/4 ~ 1/3, fuel sprays into direction and tertiary air rotating Vortex.
Upper feed(raw material)inlet and lower feed(raw material)inlet have two groups, and symmetry is located at the both sides of cylindrical shell; Distance between upper feed(raw material)inlet and lower feed(raw material)inlet and the ratio of barrel diameter are 0.7 ~ 1.1, upper feed(raw material)inlet and lower angle between feed(raw material)inlet and cylindrical shell be 30 ~ 60 ° adjustable, lower feed(raw material)inlet and cylinder body bottom distance be 500 ~ 1500mm.
Distance between upper fuel oil atomizer and middle fuel oil atomizer and the ratio of barrel diameter are 0.16 ~ 0.18; Distance between middle fuel oil atomizer and lower fuel oil atomizer and the ratio of barrel diameter are 0.16 ~ 0.18; Upper fuel oil atomizer, middle fuel oil atomizer and lower angle between fuel oil atomizer and tapering be 40 ~ 50 ° adjustable; Distance between upper fuel oil atomizer and top, tapering is greater than 500mm; Distance between bottom lower fuel oil atomizer and tapering is greater than 500mm.
Upper feed(raw material)inlet and be provided with diffusion type material-strewing device between feed(raw material)inlet and connecting tube down.
In figure, the implication of each letter: D is decomposing furnace diameter; L is the distance of upper feed(raw material)inlet and lower feed(raw material)inlet; H1 is lower feed(raw material)inlet and decomposing furnace cylinder body bottom distance; H2 is the distance between upper fuel oil atomizer and top, tapering; H3 is the distance of upper fuel oil atomizer and middle fuel oil atomizer; H4 is the distance of middle fuel oil atomizer and lower fuel oil atomizer; H5 is lower fuel oil atomizer and decomposing furnace tapering distance from bottom.
The using method of above-mentioned cement slurry preheating predecomposition device, when fuel used temperature of initial combustion is 250 ~ 400 DEG C, when to burn temperature be 450 ~ 600 DEG C, fuel sprays into from upper fuel oil atomizer, the raw material of 80 ~ 100% feed from lower feed(raw material)inlet, and the raw material of 0% ~ 20% feed from upper feed(raw material)inlet; When fuel used temperature of initial combustion is 500 ~ 650 DEG C, when to burn temperature be 700 ~ 950 DEG C, fuel sprays into from lower fuel oil atomizer, and the raw material of 70 ~ 100% feed from upper feed(raw material)inlet, and the raw material of 0% ~ 30% feed from lower feed(raw material)inlet; When fuel used temperature of initial combustion is 400 ~ 500 DEG C, when to burn temperature be 600 ~ 700 DEG C, fuel therefrom fuel oil atomizer sprays into, and the raw material of 60 ~ 80% feed from lower feed(raw material)inlet, and the raw material of 20% ~ 40% feed from upper feed(raw material)inlet.
Embodiment 2
The present embodiment adopts the cement slurry preheating predecomposition device of embodiment 1, wherein, cut that circular diameter is barrel diameter 1/4, distance between upper feed(raw material)inlet and lower feed(raw material)inlet and the ratio of barrel diameter are 0.7, upper feed(raw material)inlet and lower angle between feed(raw material)inlet and cylindrical shell are 30 °, lower feed(raw material)inlet and cylinder body bottom distance be 600mm; Distance between upper fuel oil atomizer and middle fuel oil atomizer and the ratio of barrel diameter are 0.16; Distance between middle fuel oil atomizer and lower fuel oil atomizer and the ratio of barrel diameter are 0.16; Upper fuel oil atomizer, middle fuel oil atomizer and lower angle between fuel oil atomizer and tapering are 40 °; Distance between upper fuel oil atomizer and top, tapering is greater than 600mm; Distance between bottom lower fuel oil atomizer and tapering is greater than 600mm.
Have employed a kind of typical difficult combustion hard coal and the common raw material of one, the temperature of initial combustion of coal is 620 DEG C, and end of a period temperature of combustion is 900 DEG C, and the initial decomposition temperature of raw material is 680 DEG C, and end of a period decomposition temperature is 800 DEG C.Combustion reactions due to coal dust is slower than the decomposition reaction of raw material, the embodiment that present case is concrete is: coal dust sprays in decomposing furnace by lower portion fuel oil atomizer, because coal dust sprays into direction and tertiary air in the same way, coal dust, under the rotation of tertiary air and the effect of spurting of high-temperature flue gas, can disperse rapidly and ignition.The raw material of 100% enter decomposing furnace by upper position raw material entrance, because raw material are entered by upper position entrance, create condition to coal dust preferential combustion, thus coal dust firing and raw material can be impelled to decompose two reactions carry out smoothly, avoid the phenomenon causing because coal dust firing is slow stopping working.
Comparative example 1
At present, adopt both at home and abroad the combustion technology of settling chamber to burn difficult combustion hard coal, improve the fineness of coal dust simultaneously.As shown in Figure 6: coal dust does not directly enter decomposing furnace, but after being burnt by settling chamber, then introduce decomposing furnace, the combustion position of coal dust controls by regulating the valve opening of tertiary air.From the raw material that secondary final stage cyclone cylinder is separated, bring settling chamber into by tertiary air; Due to the vortex effect of tertiary air, along on the section of settling chamber, raw meal powder concentration is increased progressively to edge by center, thus in the central zone of settling chamber, has occurred being conducive to fuel combustion oxygen-rich area.Adopt the raw material identical with case study on implementation 2 and fuel, settling chamber technology also can realize carrying out smoothly of difficult combustion hard coal and raw material, but there is obvious inferior position in settling chamber technology: 1., system operation is complicated, is unfavorable for the use of rapid combustion and low-temperature decomposition material; 2., compared to case study on implementation 2, its systemic resistance adds more than 500Pa; 3., require that the fineness 80 μm of difficult combustion pulverized anthracite tails over and be less than 2%, case study on implementation 2 then can relax to 5% difficulty combustion pulverized anthracite fineness (80 μm tail over).
Embodiment 3
The present embodiment adopts the cement slurry preheating predecomposition device of embodiment 1, wherein, cut that circular diameter is barrel diameter 1/3, distance between upper feed(raw material)inlet and lower feed(raw material)inlet and the ratio of barrel diameter are 1.1, upper feed(raw material)inlet and lower angle between feed(raw material)inlet and cylindrical shell are 60 °, lower feed(raw material)inlet and cylinder body bottom distance be 1200mm; Distance between upper fuel oil atomizer and middle fuel oil atomizer and the ratio of barrel diameter are 0.18; Distance between middle fuel oil atomizer and lower fuel oil atomizer and the ratio of barrel diameter are 0.18; Upper fuel oil atomizer, middle fuel oil atomizer and lower angle between fuel oil atomizer and tapering are 50 °; Distance between upper fuel oil atomizer and top, tapering is greater than 700mm; Distance between bottom lower fuel oil atomizer and tapering is greater than 700mm.
Have employed a kind of typical bituminous coal and the common raw material of one, the temperature of initial combustion of coal is 310 DEG C, end of a period temperature of combustion is 520 DEG C, the fineness 80 μm of pulverized bituminous coal tails over as relaxing to 10% by the < 8% of typical specification, the initial decomposition temperature of raw material is 690 DEG C, and end of a period decomposition temperature is 810 DEG C.Because the combustion reactions of coal dust is faster than the decomposition reaction of raw material, therefore the embodiment that present case is concrete is: coal dust sprays in decomposing furnace by upper position fuel oil atomizer, coal dust, under the rotation of tertiary air and the effect of spurting of high-temperature flue gas, can disperse rapidly and avoid adherent operation.The raw material of 80% ~ 90% enter decomposing furnace by lower portion raw material entrance, the raw material of remaining 10% ~ 20% enter decomposing furnace by upper position raw material entrance, because most of raw material are entered by lower portion entrance, the decomposition reaction of raw material absorbs bituminous coal rapid combustion liberated heat in time, thus avoid localized hyperthermia, effectively inhibit the generation of high temperature skinning.
Embodiment 4
The present embodiment adopts the cement slurry preheating predecomposition device of embodiment 1, wherein, cut that circular diameter is barrel diameter 1/4, distance between upper feed(raw material)inlet and lower feed(raw material)inlet and the ratio of barrel diameter are 0.9, upper feed(raw material)inlet and lower angle between feed(raw material)inlet and cylindrical shell are 50 °, lower feed(raw material)inlet and cylinder body bottom distance be 800mm; Distance between upper fuel oil atomizer and middle fuel oil atomizer and the ratio of barrel diameter are 0.17; Distance between middle fuel oil atomizer and lower fuel oil atomizer and the ratio of barrel diameter are 0.17; Upper fuel oil atomizer, middle fuel oil atomizer and lower angle between fuel oil atomizer and tapering are 405 °; Distance between upper fuel oil atomizer and top, tapering is greater than 600mm; Distance between bottom lower fuel oil atomizer and tapering is greater than 600mm.
Have employed a kind of bituminous coal and the common raw material of one, the temperature of initial combustion of coal is 450 DEG C, end of a period temperature of combustion is 680 DEG C, the fineness 80 μm of pulverized bituminous coal tails over as relaxing to 10% by the < 8% of typical specification, the initial decomposition temperature of raw material is 680 DEG C, and end of a period decomposition temperature is 810 DEG C.Due to the combustion reactions of coal dust and raw material decomposition reaction relatively, the embodiment that therefore present case is concrete is: coal dust sprays into decomposing furnace by being arranged in position fuel oil atomizer.Coal dust, under the rotation of tertiary air and the effect of spurting of high-temperature flue gas, can disperse rapidly and burn.The raw material of 70% ~ 80% enter decomposing furnace by lower portion raw material entrance, and the raw material of remaining 20% ~ 30% enter decomposing furnace by upper position raw material entrance.Because raw material enter decomposing furnace from upper position raw material entrance 1 and lower portion raw material entrance respectively according to proper ratio, both ensure that the perfect combustion of coal dust, maintained again furnace temperature in certain level, that has impelled two to react carries out smoothly.
Claims (4)
1. a cement slurry preheating predecomposition device, comprise decomposing furnace, be located at smoke-box, connecting tube and secondary final stage cyclone cylinder bottom decomposing furnace, decomposing furnace is made up of cylindrical shell and the tapering being located at cylinder body bottom, tapering is provided with tertiary air entrance, it is characterized in that: cylindrical shell is provided with from top to bottom successively feed(raw material)inlet and lower feed(raw material)inlet, tapering is provided with from top to bottom successively fuel oil atomizer, middle fuel oil atomizer and lower fuel oil atomizer; Secondary final stage cyclone cylinder is communicated with lower feed(raw material)inlet with upper feed(raw material)inlet by connecting tube;
Upper fuel oil atomizer, middle fuel oil atomizer and lower fuel oil atomizer have two groups, and symmetry is located at the both sides of tertiary air entrance;
On same group, the medullary ray of fuel oil atomizer, middle fuel oil atomizer and lower fuel oil atomizer adopts the center circle of contact to arrange, and cut that circular diameter is barrel diameter 1/4 ~ 1/3, direction is revolved in fuel spray and tertiary air rotates in the same way;
Distance between upper fuel oil atomizer and middle fuel oil atomizer and the ratio of barrel diameter are 0.16 ~ 0.18; Distance between middle fuel oil atomizer and lower fuel oil atomizer and the ratio of barrel diameter are 0.16 ~ 0.18;
Distance between upper feed(raw material)inlet and lower feed(raw material)inlet and the ratio of barrel diameter are 0.7 ~ 1.1, upper feed(raw material)inlet and lower angle between feed(raw material)inlet and cylindrical shell be 30 ~ 60 ° adjustable, lower feed(raw material)inlet and cylinder body bottom distance be 500 ~ 1500mm;
Upper fuel oil atomizer, middle fuel oil atomizer and lower angle between fuel oil atomizer and tapering be 40 ~ 50 ° adjustable; Distance between upper fuel oil atomizer and top, tapering is greater than 500mm; Distance between bottom lower fuel oil atomizer and tapering is greater than 500mm.
2. cement slurry preheating predecomposition device as claimed in claim 1, is characterized in that: upper feed(raw material)inlet and lower feed(raw material)inlet have two groups, and symmetry is located at the both sides of cylindrical shell.
3. cement slurry preheating predecomposition device as claimed in claim 1 or 2, is characterized in that: upper feed(raw material)inlet and be provided with diffusion type material-strewing device between feed(raw material)inlet and connecting tube down.
4. the using method of the cement slurry preheating predecomposition device described in claim 1-3 any one, it is characterized in that: when fuel used temperature of initial combustion is 250 ~ 400 DEG C, when to burn temperature be 450 ~ 600 DEG C, fuel sprays into from upper fuel oil atomizer, the raw material of 80 ~ 100% feed from lower feed(raw material)inlet, and the raw material of 0% ~ 20% feed from upper feed(raw material)inlet; When fuel used temperature of initial combustion is 500 ~ 650 DEG C, when to burn temperature be 700 ~ 950 DEG C, fuel sprays into from lower fuel oil atomizer, and the raw material of 70 ~ 100% feed from upper feed(raw material)inlet, and the raw material of 0% ~ 30% feed from lower feed(raw material)inlet; When fuel used temperature of initial combustion is 400 ~ 500 DEG C, when to burn temperature be 600 ~ 700 DEG C, fuel therefrom fuel oil atomizer sprays into, and the raw material of 60 ~ 80% feed from lower feed(raw material)inlet, and the raw material of 20% ~ 40% feed from upper feed(raw material)inlet.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3881862A (en) * | 1972-09-04 | 1975-05-06 | Kawasaki Heavy Ind Ltd | Apparatus for calcination of cement-clinker |
| CN1554610A (en) * | 2003-12-26 | 2004-12-15 | 昆明理工大学 | Coal type universal cement clinker calcining process and device |
| CN203545892U (en) * | 2013-10-18 | 2014-04-16 | 中国中材国际工程股份有限公司 | Cement raw meal preheating and predecomposition device |
-
2013
- 2013-10-18 CN CN201310489297.8A patent/CN103553381B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3881862A (en) * | 1972-09-04 | 1975-05-06 | Kawasaki Heavy Ind Ltd | Apparatus for calcination of cement-clinker |
| CN1554610A (en) * | 2003-12-26 | 2004-12-15 | 昆明理工大学 | Coal type universal cement clinker calcining process and device |
| CN203545892U (en) * | 2013-10-18 | 2014-04-16 | 中国中材国际工程股份有限公司 | Cement raw meal preheating and predecomposition device |
Non-Patent Citations (1)
| Title |
|---|
| Cherat水泥公司利用MI-CFD理论提高分解炉的性能;张凯;《水泥技术》;20130401;第1卷(第1期);第103页 * |
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