CN104180647A - Method for improving temperature in rotary kiln - Google Patents
Method for improving temperature in rotary kiln Download PDFInfo
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- CN104180647A CN104180647A CN201410467959.6A CN201410467959A CN104180647A CN 104180647 A CN104180647 A CN 104180647A CN 201410467959 A CN201410467959 A CN 201410467959A CN 104180647 A CN104180647 A CN 104180647A
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- rotary kiln
- coal gas
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- stratification
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Abstract
The invention provides a method for improving the temperature in a rotary kiln. A kiln head spray gun of the rotary kiln is internally provided with a plurality of gas supply layers which include the inner gas flow layer, the inner flow air layer arranged on the surface of the inner gas flow layer in a surrounding mode, the main gas flow layer arranged on the surface of the inner flow air layer in a surrounding mode and the outer flow air layer arranged on the surface of the main gas flow layer in a surrounding mode, wherein the middle of the inner gas flow layer is further provided with a center flow air layer arranged in the flow direction of the inner gas flow layer, and a center flow air layer is further arranged in the inner gas flow layer. Thus, after gas is output, the two layers of gas is sandwiched between two layers of air, in the combustion process, combustion is simultaneously conducted on the interior and the exterior of each gas layer, the gas can be combusted more sufficiently, more heat is provided, the requirement for low-heating-value and large-flow gas combustion can be better met, the insufficiency of the heat values is overcome by adding the using amount, and a higher temperature can be obtained in the rotary kiln.
Description
Technical field
The present invention relates to rotary kiln device technical field, more particularly, relate to a kind of method that improves rotary kiln temperature.
Background technology
Rotary kiln, in many production industries such as building materials, metallurgy, chemical industry, environmental protection, uses revolving drum equipment to carry out machinery, physical or chemical treatment to solid material widely.
The roasting of pellet in rotary kiln need at high temperature be carried out, but due to the restriction of fuel gases calorific value condition, the part producing line in existing equipment is difficult to the sintering temperature that reaches predetermined.
Therefore, how improving the sintering temperature in rotary kiln, is current those skilled in the art's problem demanding prompt solution.
Summary of the invention
In view of this, the invention provides a kind of method that improves rotary kiln temperature, to realize the sintering temperature improving in rotary kiln.
In order to achieve the above object, the invention provides following technical scheme:
A kind of method that improves rotary kiln temperature, multilayer is set for gas-bearing formation in the kiln hood spray gun of rotary kiln, comprise interior coal gas fluid layer, be around in the interior stream stratification of wind on described interior coal gas fluid layer surface, be around in the main coal gas fluid layer on described interior stream stratification of wind surface, be around in the outflow stratification of wind on described main coal gas fluid layer surface, the middle part of described interior coal gas fluid layer is also provided with along it and flows to the center stream stratification of wind of arranging.
Preferably, in the method for above-mentioned raising rotary kiln temperature, also comprise the cross-sectional area that increases described main coal gas fluid layer.
Preferably, in the method for above-mentioned raising rotary kiln temperature, the air-out of described interior stream stratification of wind flows to as favouring stream stratification of wind in the axial rotation air-out of described kiln hood spray gun.
Preferably, in the method for above-mentioned raising rotary kiln temperature, also comprise the monsoon intensity that goes out that increases described interior stream stratification of wind.
Preferably, in the method for above-mentioned raising rotary kiln temperature, also comprise the open height of the kiln tail reducing that reduces rotary kiln, to reduce the discharge area of kiln tail fore shaft.
Preferably, in the method for above-mentioned raising rotary kiln temperature, on the backhaul furnace wall of drying grate, enclose furnace wall heat-insulation layer.
Preferably, in the method for above-mentioned raising rotary kiln temperature, described furnace wall heat-insulation layer is fibrofelt heat-insulation layer.
Preferably, in the method for above-mentioned raising rotary kiln temperature, the temperature that described drying grate dryer section arranges the grate to described drying grate is incubated the grate heat-insulation layer of protection.
The method of raising rotary kiln temperature provided by the invention, multilayer is set for gas-bearing formation in the kiln hood spray gun of rotary kiln, comprise interior coal gas fluid layer, be around in the interior stream stratification of wind on interior coal gas fluid layer surface, be around in the main coal gas fluid layer on interior stream stratification of wind surface, be around in the outflow stratification of wind on main coal gas fluid layer surface, the middle part of interior coal gas fluid layer is also provided with along it and flows to the center stream stratification of wind of arranging.Kiln hood spray gun supplies gas-bearing formation ejection burning coal gas by multilayer, interior coal gas fluid layer is positioned at center and carries coal gas, its surface encloses stream stratification of wind in a circle, interior stream stratification of wind surface encloses respectively the main coal gas fluid layer of a circle and outflow stratification of wind again, coal gas and air are stacked around output kiln hood spray gun, and coal gas is stratified combustion simultaneously.The inside of interior coal gas fluid layer also arranges center stream stratification of wind, therefore after coal gas output, two-layer coal gas is all folded between two layer of air, and therefore, in the time of burning, every layer of coal gas layer is all by inside and outside burning simultaneously, make coal gas obtain burning more fully, more heat is provided, can better meets the needs of low heat value, gas of high flow rate burning, by increasing use amount, make up the deficiency of calorific value, make the higher temperature of acquisition in rotary kiln.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
Fig. 1 is for the structural representation of the kiln hood spray gun providing is provided;
Fig. 2 is the structural representation of rotary kiln provided by the invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The invention provides a kind of method that improves rotary kiln temperature, multilayer is set for gas-bearing formation in the kiln hood spray gun of rotary kiln, comprise interior coal gas fluid layer, be around in the interior stream stratification of wind on interior coal gas fluid layer surface, be around in the main coal gas fluid layer on interior stream stratification of wind surface, be around in the outflow stratification of wind on main coal gas fluid layer surface, the middle part of interior coal gas fluid layer is also provided with along it and flows to the center stream stratification of wind of arranging.Kiln hood spray gun supplies gas-bearing formation ejection burning coal gas by multilayer, interior coal gas fluid layer is positioned at center and carries coal gas, its surface encloses stream stratification of wind in a circle, interior stream stratification of wind surface encloses respectively the main coal gas fluid layer of a circle and outflow stratification of wind again, coal gas and air are stacked around output kiln hood spray gun, and coal gas is stratified combustion simultaneously.The inside of interior coal gas fluid layer also arranges center stream stratification of wind, therefore after coal gas output, two-layer coal gas is all folded between two layer of air, and therefore, in the time of burning, every layer of coal gas layer is all by inside and outside burning simultaneously, make coal gas obtain burning more fully, more heat is provided, can better meets the needs of low heat value, gas of high flow rate burning, by increasing use amount, make up the deficiency of calorific value, make the higher temperature of acquisition in rotary kiln.
For further optimizing technique scheme, also comprise the cross-sectional area that increases main coal gas fluid layer.By increasing the cross-sectional area of main coal gas airflow layer, make winner's Gas Flow layer that more coal gas can be provided, thereby the coal gas total amount that has increased the output of kiln hood spray gun, the burning of coal gas makes kiln hood spray gun that more heat is provided, and meets the needs of gas of high flow rate burning.
For further optimizing technique scheme, the air-out of interior stream stratification of wind flows to as favouring stream stratification of wind in the axial rotation air-out of kiln hood spray gun.Interior stream stratification of wind rotary irradiating goes out kiln hood spray gun, and therefore it,, in the process of ejection, can mix the coal gas of interior coal gas fluid layer outer ring and main coal gas fluid layer inner ring fully with air, thereby make coal gas obtain better combustion efficiency.The structure for conveying that interior stream stratification of wind produces compared to kiln hood spray gun, can control by the inlet air angle of controlling interior stream stratification of wind input.
Further, also comprise the monsoon intensity that goes out that increases interior stream stratification of wind.For the mixing uniformity of stream stratification of wind in further improving and coal gas layer, by increasing the monsoon intensity that of interior stream stratification of wind, it produces in the process of kiln hood spray gun in rotation, has higher air-out speed, coal gas is mixed more even.
As shown in Figure 1, Fig. 1 is for the structural representation of the kiln hood spray gun providing is provided.
Kiln hood spray gun comprises coaxially arranged multilayer transfer pipeline, center stream stratification of wind is passed into by the center culvert 1 at kiln hood spray gun center, interior coal gas fluid layer is passed into by the interior gaspipe line 2 being set in center culvert, interior stream stratification of wind is passed into by the interior stream air pipe line being set on interior gaspipe line 2, the outer sheathed main gas pipe of interior stream air pipe line road, outside main gas pipe road, sheathed outflow air pipe line passes into.One main ventilation pipeline 5 is set on kiln hood spray gun, and main ventilation pipeline 5 is directly communicated to outflow air pipe line, and on it, separates the first pipeline 3 that is communicated to interior stream air pipe line, and in center culvert 1, second pipeline being separated by main ventilation pipeline 5 equally that passes into of air passes into.Kiln hood spray gun is by its rifle head output combustion mixture body.
As shown in Figure 2, the structural representation that Fig. 2 is rotary kiln provided by the invention.
Extractor fan is arranged on the output 8 of rotary kiln 7, and the input of kiln tail 7 is kiln tail fore shaft 9, by reducing the height of kiln tail fore shaft 9, to reduce the discharge area of kiln tail fore shaft 9.
In the present invention's one specific embodiment, also comprise the open height of the kiln tail reducing that reduces rotary kiln, to reduce the discharge area of kiln tail fore shaft.Material carries out roasting in rotary kiln in transport process, the kiln tail of rotary kiln is provided with extractor fan, and the high-temperature gas in rotary kiln is drawn to subsequent processing.High-temperature gas in rotary kiln is extracted out through the fore shaft of kiln tail, by reducing the reducing open height of rotary kiln, reduce the discharge area of kiln tail fore shaft, because the exhausting ability of extractor fan is constant, by dwindling the discharge area of kiln tail fore shaft, reduce the discharge of the interior gas of rotary kiln through kiln tail fore shaft, therefore the high-temperature gas in rotary kiln can retain the long time that bakes, increase the heat storage capacity of rotary kiln, thereby also just extended the bake time of material in rotary kiln.
For further optimizing technique scheme, on the backhaul furnace wall of drying grate, enclose furnace wall heat-insulation layer.By improving the insulating power of rotary kiln, on the backhaul furnace wall of drying grate, heat-insulation layer is set, reduce the heat loss of drying grate, therefore material, in drying grate is sent into rotary kiln, can make more heat send into rotary kiln, to improve the temperature in rotary kiln.By enclosing furnace wall heat-insulation layer on the backhaul furnace wall at drying grate, jointly to being incubated in rotary kiln, improve the temperature in rotary kiln by the insulation construction in furnace wall heat-insulation layer and original backhaul furnace wall.
Particularly, furnace wall heat-insulation layer is fibrofelt heat-insulation layer.
For further optimizing technique scheme, the temperature that drying grate dryer section arranges the grate to drying grate is incubated the grate heat-insulation layer protecting.On the basis in the insulation of drying grate backhaul preheating section, increase the insulation construction of drying grate dryer section, to increase the insulating power of grate temperature, avoid scattering and disappearing of its temperature, thereby improve the insulating power of rotary kiln.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. one kind is improved the method for rotary kiln temperature, it is characterized in that, multilayer is set for gas-bearing formation in the kiln hood spray gun of rotary kiln, comprise interior coal gas fluid layer, be around in the interior stream stratification of wind on described interior coal gas fluid layer surface, be around in the main coal gas fluid layer on described interior stream stratification of wind surface, be around in the outflow stratification of wind on described main coal gas fluid layer surface, the middle part of described interior coal gas fluid layer is also provided with along it and flows to the center stream stratification of wind of arranging.
2. the method for raising rotary kiln temperature according to claim 1, is characterized in that, also comprises the cross-sectional area that increases described main coal gas fluid layer.
3. the method for raising rotary kiln temperature according to claim 1, is characterized in that, the air-out of described interior stream stratification of wind flows to as favouring stream stratification of wind in the axial rotation air-out of described kiln hood spray gun.
4. the method for raising rotary kiln temperature according to claim 3, is characterized in that, also comprises the monsoon intensity that goes out that increases described interior stream stratification of wind.
5. the method for raising rotary kiln temperature according to claim 1, is characterized in that, also comprises the open height of the kiln tail reducing that reduces rotary kiln, to reduce the discharge area of kiln tail fore shaft.
6. the method for raising rotary kiln temperature according to claim 1, is characterized in that, on the backhaul furnace wall of drying grate, encloses furnace wall heat-insulation layer.
7. the method for raising rotary kiln temperature according to claim 6, is characterized in that, described furnace wall heat-insulation layer is fibrofelt heat-insulation layer.
8. the method for raising rotary kiln temperature according to claim 6, is characterized in that, the temperature that described drying grate dryer section arranges the grate to described drying grate is incubated the grate heat-insulation layer of protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410467959.6A CN104180647A (en) | 2014-09-15 | 2014-09-15 | Method for improving temperature in rotary kiln |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410467959.6A CN104180647A (en) | 2014-09-15 | 2014-09-15 | Method for improving temperature in rotary kiln |
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| CN104180647A true CN104180647A (en) | 2014-12-03 |
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| CN201410467959.6A Pending CN104180647A (en) | 2014-09-15 | 2014-09-15 | Method for improving temperature in rotary kiln |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860018A (en) * | 2017-10-31 | 2018-03-30 | 中国科学院力学研究所 | A kind of cement rotary kiln stove with coal dust pre-vaporized room |
| CN112484026A (en) * | 2020-12-04 | 2021-03-12 | 鞍钢集团矿业有限公司 | Double-rotational-flow pulverized coal burner and chain grate with same |
| CN112503927A (en) * | 2020-12-11 | 2021-03-16 | 四川德胜集团钒钛有限公司 | Rotary kiln spray gun gas supply device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201462853U (en) * | 2009-09-16 | 2010-05-12 | 新兴铸管股份有限公司 | Combustion nozzle used in lime rotary kiln |
| CN201575462U (en) * | 2009-12-29 | 2010-09-08 | 襄樊大力机电技术有限公司 | Mixed pulverized coal and gas fuel burner for rotary kiln |
| CN102012024A (en) * | 2010-11-12 | 2011-04-13 | 新兴能源装备有限公司 | Gas burner for active lime rotary kiln producer |
-
2014
- 2014-09-15 CN CN201410467959.6A patent/CN104180647A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201462853U (en) * | 2009-09-16 | 2010-05-12 | 新兴铸管股份有限公司 | Combustion nozzle used in lime rotary kiln |
| CN201575462U (en) * | 2009-12-29 | 2010-09-08 | 襄樊大力机电技术有限公司 | Mixed pulverized coal and gas fuel burner for rotary kiln |
| CN102012024A (en) * | 2010-11-12 | 2011-04-13 | 新兴能源装备有限公司 | Gas burner for active lime rotary kiln producer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860018A (en) * | 2017-10-31 | 2018-03-30 | 中国科学院力学研究所 | A kind of cement rotary kiln stove with coal dust pre-vaporized room |
| CN112484026A (en) * | 2020-12-04 | 2021-03-12 | 鞍钢集团矿业有限公司 | Double-rotational-flow pulverized coal burner and chain grate with same |
| CN112503927A (en) * | 2020-12-11 | 2021-03-16 | 四川德胜集团钒钛有限公司 | Rotary kiln spray gun gas supply device |
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Application publication date: 20141203 |