CN102121786B - Hot air system of grate-rotary kiln-circular cooler - Google Patents
Hot air system of grate-rotary kiln-circular cooler Download PDFInfo
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- CN102121786B CN102121786B CN2011100545194A CN201110054519A CN102121786B CN 102121786 B CN102121786 B CN 102121786B CN 2011100545194 A CN2011100545194 A CN 2011100545194A CN 201110054519 A CN201110054519 A CN 201110054519A CN 102121786 B CN102121786 B CN 102121786B
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Abstract
The invention relates to a hot air system of a grate-rotary kiln-circular cooler, which comprises a grate, a circular cooler, a flue gas pipeline, a fan, a rotary kiln, a hot air pipeline and an automatic temperature regulation device of a start/stop furnace, wherein the rotary kiln is connected with the grate and the circular cooler; the hot air system is characterized in that: pipeline heating furnaces are arranged on the hot air pipelines of the cold section II of the circular cooler and a preheating section I of the grate as well as on the cold section III of the circular cooler and a forced air drying section of the grate respectively; and each pipeline heating furnace comprises a hearth, an efficient fuel gas burner and a combustion fan, wherein the hearth is communicated with the hot air pipelines; the efficient fuel gas burner is connected with a protruding end of the hearth; and the combustion fan is connected with the efficient fuel gas burner through a pipeline and a pipeline valve. A thermocouple is mounted at a hot air outlet of the hearth; and the thermocouple and the pipeline valve are connected with the automatic temperature regulation device of the start/stop furnace. The hot air system provided by the invention has the advantages that: the floor area of the pipeline heating furnace is small, the maintenance is little, the burning efficiency of the efficient burner is high, and the pipeline heating furnace can supplement heat for the hot air in the pipelines so as to generate hot air required by the process.
Description
Technical field
The present invention relates to chain grate machine rotary kiln pelletizing process hot-air system technical field, the hot-air system of particularly a kind of chain grate machine-rotary kiln-central cooler.
Background technology
The recycle of hot blast in chain grate machine-rotary kiln-central cooler pelletizing process hot-air system is played important effect to energy-saving and cost-reducing, and it directly determines the energy consumption index of pellet production line and the ordinary production of whole system.In chain grate machine-rotary kiln pelletizing process, there is the relation of utilizing each other in the hot blast between chain grate machine, rotary kiln, this three big main frame of central cooler.Chain grate facility have the drying of pair green-ball and the function of preheating, and generally speaking, chain grate machine is divided into four sections, separate with partition wall between each section, are followed successively by blasting drying period, down-draft drying zone, preheating I section, preheating II section from feed end.Rotary kiln carries out preheating to the pelletizing through chain grate machine, and the pelletizing with certain intensity is carried out roasting, make the inner crystal grain of pelletizing again crystallization to play the effect of sclerosis.Central cooler carries out air blast cooling back outward transport to the hot-bulb nodulizing from rotary kiln, and central cooler generally is divided into four cooling sections, is followed successively by to cold ball from hot-bulb: one cold section, secondary cooling zone, three cold sections, four cold sections.The hot blast of each section of chain grate machine is respectively from rotary kiln, central cooler and the hot air circulation of itself, and the blasting drying period hot blast is from three cold sections of central coolers, and the heatrejection of three cold sections hot air duct outlets of central cooler is 270 ℃; Through pipeline operation in long distance; The thermal loss temperature is reduced to 150 ℃-180 ℃, and blasting drying period needs 200 ℃ hot waste gas, and the hot blast of down-draft drying zone is from preheating II section; The hot blast of preheating I section is from the secondary cooling zone of central cooler; The heatrejection of the secondary cooling zone hot air duct outlet of central cooler is 650 ℃, and through the pipeline operation in long distance, the thermal loss temperature is reduced to 500 ℃-550 ℃; And preheating I section needs 600 ℃ hot waste gas, and the hot blast of preheating II section is from rotary kiln; The secondary hot-air of rotary kiln is from one cold section of central cooler; The hot blast that central cooler is four cold sections is owing to be lower than 120 ℃, and the value of not utilizing again is through the dedusting emptying.During ordinary production, central cooler and rotary kiln can be continuously chain grate machine provides hot blast that green-ball is carried out drying and preheating.Particularly produce the initial stage, central cooler does not have hot-bulb, can not hot blast be provided for rotary kiln and chain grate machine.Therefore, chain grate apparatus for forced section and preheating I section do not have hot blast that green-ball is carried out drying and preheating.Because green-ball need carry out drying and preheating and could guarantee not explosion under the uniform temperature gradient in chain grate machine; But produce young blow dryer section and preheating I section and do not have hot blast; That is to say that chain grate machine down-draft drying zone and preheating II section exist hot blast that green-ball is carried out drying and preheating,, the moisture of green-ball inside discharged have destructive effect because the hot blast temperature of down-draft drying zone and preheating II section differs greatly; Cause the green-ball explosion; Such result is exactly the load that has increased deduster on the one hand, and the green-ball entering rotary kiln when explosion can cause the knot kliner coating on the other hand, gets into central cooler and can cause central cooler to harden.Therefore, it is very important setting up the hot-air system at production initial stage.
Summary of the invention
The purpose of this invention is to provide a kind of hot-air system that improves the chain grate machine-rotary kiln-central cooler of balling ratio.
The hot-air system of chain grate machine-rotary kiln of the present invention-central cooler; Comprise the chain grate machine of forming by blasting drying period, down-draft drying zone, preheating I section, preheating II section; By one cold section, secondary cooling zone, three cold sections and four cold sections central coolers of forming; The rotary kiln of connection chain grate machine and central cooler is arranged on the hot air duct between three cold sections of blasting drying period and the central coolers, be arranged on the down-draft drying zone and preheating II section between hot air duct; Be arranged on the hot air duct between preheating I section and the central cooler secondary cooling zone; Blower fan, the automatic temperature control device of a blowing out is characterized in that: in the hot air duct between central cooler secondary cooling zone and chain grate machine preheating I section a Pipeline Heating Furnace is set; On the hot air duct between three cold sections of central coolers and the chain grate apparatus for forced section, a Pipeline Heating Furnace is set again; Described Pipeline Heating Furnace is by the burner hearth that is communicated with hot air duct, the high efficiency burnt gas burner that connects of burner hearth jag therewith, through pipeline and pipeline valve therewith the combustion fan that is connected of high efficiency burnt gas burner form.
The present invention installs thermocouple at the hot wind outlet place of described burner hearth, and this thermocouple and described pipeline valve are connected with the automatic temperature control device of start and stop stove.
Described high efficiency burnt gas burner is the adjustable high efficiency burnt gas burner of quantity combusted.
Described combustion fan is the adjustable blower fan of air output.
Compared with prior art the invention has the beneficial effects as follows:
Because the present invention is provided with a Pipeline Heating Furnace on the hot air duct between central cooler secondary cooling zone and the chain grate machine preheating I section; This Pipeline Heating Furnace can be for coming from the pipeline hot blast additional heat of central cooler; The EGT that lowers through the hot air duct operation in long distance is raise, reached preheating I section and the required temperature of blasting drying period process conditions.Pipeline Heating Furnace of the present invention is simple in structure, and equipment takes up an area of little, and maintenance is little, and efficient burner combustion efficient is high, provides hot blast temperature even; And because the thermocouple at the hot wind outlet place of burner hearth and pipeline valve are connected with the automatic temperature control device that plays blowing out, improved the temperature control automation of hot-air system effectively, need not to increase the post workman and keep an eye on.
Description of drawings
Fig. 1 is the structural representation of the hot-air system of chain grate machine-rotary kiln of the present invention-central cooler.
Fig. 2 is the structural representation of Pipeline Heating Furnace of the present invention.
Fig. 3 is the vertical view of Fig. 2.
The specific embodiment
Below in conjunction with the description of drawings specific embodiment of the present invention.
Like Fig. 1 Fig. 2, shown in Figure 3; The hot-air system of chain grate machine-rotary kiln of the present invention-central cooler; Comprise the chain grate machine of forming by blasting drying period 1, down-draft drying zone 2, preheating I section 3, preheating II section 4, by one cold section 8,9, three cold sections 10 and four cold sections 11 central coolers of forming of secondary cooling zone, the rotary kiln 7 of connection chain grate machine and central cooler; Be arranged on the hot air duct between three cold sections 10 of blasting drying period 1 and the central coolers; Be arranged on down-draft drying zone 2 and preheating II section 4 between hot air duct, be arranged on the hot air duct 5 between preheating I section 3 and the central cooler secondary cooling zone 9, blower fan; Play the automatic temperature control device of blowing out; It is characterized in that: on the pipeline 5 between central cooler secondary cooling zone 9 and the chain grate machine preheating I section 3, a Pipeline Heating Furnace 6 is set, makes through moving the central cooler secondary cooling zone heatrejection of reducing to 500 ℃-550 ℃ and be increased to 620 ℃-650 ℃, reached the required 600 ℃ heatrejection of chain grate machine preheating I section at the hot air duct of growing distance 5; The present invention is provided with a Pipeline Heating Furnace 6 again on the hot air duct between three cold sections 10 of central coolers and the chain grate apparatus for forced section 1; Make the three cold sections heatrejections of central cooler through reduce to 150 ℃-180 ℃ in the hot air duct operation of long distance be increased to 210 ℃-220 ℃, having reached blasting drying period needs 200 ℃ heatrejection.
The present invention installs thermocouple 6-5 at the hot wind outlet place of described burner hearth, and this thermocouple 6-5 and pipeline valve are connected with the automatic temperature control device that plays blowing out.Through the monitoring to temperature, the aperture of control burnt gas valve and the air door of combustion fan are to reach the purpose of control wind-warm syndrome.
Described high efficiency burnt gas burner 6-2 is the adjustable high efficiency burnt gas burner of quantity combusted.
Described combustion fan 6-3 is the adjustable blower fan of air output.
The pelletizing process that Pipeline Heating Furnace in the hot-air system of the present invention is specially adapted to the bloodstone raw material uses, because the bloodstone raw material need be than magnetic iron ore more heat.
Claims (4)
1. the hot-air system of chain grate machine-rotary kiln-central cooler; Comprise the chain grate machine of forming by blasting drying period, down-draft drying zone, preheating I section, preheating II section; By one cold section, secondary cooling zone, three cold sections and four cold sections central coolers of forming, flue, blower fan; The rotary kiln of connection chain grate machine and central cooler; Be arranged on the hot air duct between three cold sections of blasting drying period and the central coolers, be arranged on the down-draft drying zone and preheating II section between hot air duct, be arranged on the hot air duct between preheating I section and the central cooler secondary cooling zone; Play the automatic temperature control device of blowing out; It is characterized in that: the hot air duct between central cooler secondary cooling zone and chain grate machine preheating I section is provided with a Pipeline Heating Furnace, on the hot air duct between three cold sections of central coolers and the chain grate apparatus for forced section, a Pipeline Heating Furnace is set again, and described Pipeline Heating Furnace is by the burner hearth that is communicated with described hot air duct; The high efficiency burnt gas burner that connects of burner hearth jag therewith, through pipeline and pipeline valve therewith the combustion fan that is connected of high efficiency burnt gas burner form.
2. the hot-air system of chain grate machine-rotary kiln according to claim 1-central cooler is characterized in that at the hot wind outlet place of described burner hearth thermocouple being installed, and this thermocouple and described pipeline valve are connected with the automatic temperature control device of start and stop stove.
3. the hot-air system of chain grate machine-rotary kiln according to claim 1-central cooler is characterized in that described high efficiency burnt gas burner is the adjustable high efficiency burnt gas burner of quantity combusted.
4. the hot-air system of chain grate machine-rotary kiln according to claim 1-central cooler is characterized in that described combustion fan is the adjustable blower fan of air output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011100545194A CN102121786B (en) | 2011-03-08 | 2011-03-08 | Hot air system of grate-rotary kiln-circular cooler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100545194A CN102121786B (en) | 2011-03-08 | 2011-03-08 | Hot air system of grate-rotary kiln-circular cooler |
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| CN102121786A CN102121786A (en) | 2011-07-13 |
| CN102121786B true CN102121786B (en) | 2012-03-28 |
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| CN2011100545194A Active CN102121786B (en) | 2011-03-08 | 2011-03-08 | Hot air system of grate-rotary kiln-circular cooler |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252530B (en) * | 2011-07-15 | 2013-01-23 | 中冶北方工程技术有限公司 | Novel waste heat utilization and emission reduction process for hot air systems of chain grate machine, rotary kiln and circular cooler |
| CN103335522B (en) * | 2013-07-31 | 2015-08-12 | 中冶北方（大连）工程技术有限公司 | Drying grate blasting drying period hot-air system |
| CN107120963A (en) * | 2017-07-11 | 2017-09-01 | 中冶北方（大连）工程技术有限公司 | Belt type roasting machine is cooled down and backheat wind system and its method |
| CN108165735B (en) * | 2018-02-11 | 2024-04-09 | 中冶北方（大连）工程技术有限公司 | Pellet production process simulation test system |
| CN108332562A (en) * | 2018-03-27 | 2018-07-27 | 中冶北方（大连）工程技术有限公司 | Grate preheating section concurrent heating system |
| CN108267009B (en) * | 2018-03-27 | 2023-12-12 | 中冶北方（大连）工程技术有限公司 | Hot air system of chain grate machine |
| CN110487065B (en) * | 2019-09-26 | 2024-06-11 | 中冶北方（大连）工程技术有限公司 | Chain grate preheating two-stage hot air supply system and temperature adjusting method |
| CN112066731B (en) * | 2020-09-25 | 2022-05-27 | 中冶北方（大连）工程技术有限公司 | Hot air system of chain grate machine |
| CN113188335B (en) * | 2021-04-22 | 2023-12-26 | 江苏省沙钢钢铁研究院有限公司 | Chain grate rotary kiln hot air system suitable for active coke desulfurization and denitrification process |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1074108A (en) * | 1975-05-13 | 1980-03-25 | Glenn A. Heian | Grate preheater kiln system |
| US5057009A (en) * | 1991-01-11 | 1991-10-15 | Wisconsin Electric Power Company | Lightweight aggregate from flyash and sewage sludge |
| JP3905684B2 (en) * | 2000-04-13 | 2007-04-18 | カワサキプラントシステムズ株式会社 | Method and apparatus for manufacturing ground improvement material |
| CN201172676Y (en) * | 2008-04-14 | 2008-12-31 | 顾玲 | Process wind system of drying grate-rotary kiln-circular cooler for producing acid pellet |
| CN101760608A (en) * | 2010-02-10 | 2010-06-30 | 江苏华能冶金工程技术有限公司 | Outlet flue gas temperature regulating device in iron ore pellet engineering equipment |
| CN201926272U (en) * | 2011-03-08 | 2011-08-10 | 中冶北方工程技术有限公司 | Hot air system of chain grate-rotary kiln-circular cooler |
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