CN201508114U - Comprehensive residual heat-recycling hot air flow system for pellet production facilities - Google Patents
Comprehensive residual heat-recycling hot air flow system for pellet production facilities Download PDFInfo
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- CN201508114U CN201508114U CN2009200432940U CN200920043294U CN201508114U CN 201508114 U CN201508114 U CN 201508114U CN 2009200432940 U CN2009200432940 U CN 2009200432940U CN 200920043294 U CN200920043294 U CN 200920043294U CN 201508114 U CN201508114 U CN 201508114U
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Abstract
The utility model discloses a comprehensive residual heat-recycling hot air flow system for pellet production facilities, which relates to the technical field of energy saving in the metallurgical industry and is mainly used for the grate-kiln-cooler pellet production technique. The hot air flow system has the following characteristics that: the hot air flow system comprises a high-efficiency high-temperature residual pellet heat-recovering hot air flow subsystem for a recirculation cooler part, a high-efficiency high-temperature residual grate bed heat-recovering hot air flow subsystem for a chain grate part, a preheating-drying section heat-recycling hot air flow subsystem for the chain grate part and a pulverized coal-preheating hot air flow subsystem for a rotary kiln part. By efficiently recovering and using the heat of high-temperature pellets in the recirculation cooler and the residual heat of a grate bed of the chain grate in the drying and preheating of pellets in the chain grate or other purposes, the utility model increases the efficiency of recovering and utilizing residual heat, reduces the consumption of coal by pellet production facilities, and further enhances the energy-saving and emission-reducing effects of pellet production facilities.
Description
Technical field
The utility model relates to a kind of pellet production equipment residual heat integrative and recycles hot air flow system, relates to the metallurgical industry field of energy-saving technology, is mainly used in grate kiln-central cooler pelletizing production technology, realizes energy-saving and emission-reduction production.
Background technology
Compare with the SINTERING PRODUCTION technology, the pellet production technology is a kind of more reasonable effective and energy-conservation agglomeration technology, produces the coal that the 1t pellet is consumed, and approximately is to produce 1/3 of 1t sintering deposit.The production of pellet mainly comprises two processes: balling-up and oxidation, more complicated in the two is oxidizing process, the main both at home and abroad oxidation of adopting three kinds of equipment to realize pelletizing.The grate kiln system is as one of three kinds of capital equipments, than shaft furnace and continuous pallettype sintering machine, have a series of outstanding advantages such as adaptability to raw material are strong, unit production capacity is big, roasting is even, pellet quality is good, can use that coal dust acts as a fuel, development in recent years is very rapid.
Drying grate, rotary kiln and central cooler constitute hot air flow system, by central cooler part effectively being reclaimed drying and the waste heat that heat in the high temperature pelletizing cooling procedure and the circulation of rotary kiln fuel combustion waste heat are used for drying grate part pelletizing, energy consumption is reduced greatly.The central cooler heat recovery and utilization distinguished and admirable according to 4 zones of present cooling to four parts should be arranged, the high-temperature flue gas that central cooler is one cold section directly enters rotary kiln as secondary wind, the hot waste gas of secondary cooling zone enters the preheating I section of drying grate, discharge the blasting drying period that gas enters drying grate for three cold sections, four cold sections waste gas directly diffuse by the chimney on the central cooler.The drying grate heat is recycling distinguished and admirable except the hot waste gas of preheating II section thermal source from rotary kiln, outside the hot waste gas of preheating I section thermal source from the central cooler secondary cooling zone, the down-draft drying zone thermal source is from the recovery hot waste gas of drying grate preheating II section, and the low temperature hot blast of blasting drying period is from the recovery hot waste gas of central cooler the 3rd cooling section and drying grate preheating I section.
By above hot air flow system analysis is found: the central cooler heat recovery method is simple, and organic efficiency is low, and the hot gas temperature that three cold sections and four cold sections waste heat recoveries obtain is not high, causes utilization efficiency of heat energy low, and it is big that four cold sections waste gas directly diffuses heat-energy losses; Grate bed temperature in carrying the pelletizing process is elevated to 500 ℃ gradually, naturally cools in the air about 100 ℃ by being exposed in the backhaul section then, and heat energy is not recycled.Therefore, the existing distinguished and admirable system of drying grate, rotary kiln and central cooler is not exclusively reasonable, and is not high to heat energy utilization effect in producing, the space that also have further recovery waste heat, cuts down the consumption of energy.
The utility model content
The purpose of this utility model is to overcome the deficiency of above-mentioned existence, disclose a kind of pellet production equipment residual heat integrative and recycle hot air flow system, be characterized in: high temperature pelletizing heat in the central cooler and grate bed waste heat are carried out high efficiente callback, be used for drying grate pelletizing drying and preheating etc., further improve the pellet production equipment effects of energy saving and emission reduction.
The said pellet production equipment residual heat integrative of the utility model is recycled hot air flow system, it is characterized in that: hot air flow system comprises the high temperature pelletizing waste heat high efficiente callback hot blast stream subsystem of central cooler part, and the high temperature comb bed waste heat high efficiente callback hot blast stream subsystem of drying grate part, the preheating and drying section heat recycling hot blast stream subsystem and rotary kiln pulverized coal preheating hot blast stream subsystem four parts partly of drying grate part are formed.
The pelletizing course of conveying is in the said pellet production equipment residual heat integrative recycling of the utility model hot air flow system: the green-ball of normal temperature moves back and forth by the bed of combing and is fed forward, respectively through the bed blasting drying period of combing, a comb bed preheating section, temperature is elevated near 1000 ℃, obtain dry bulb, enter rotary kiln then, by rotary kiln slewing equipment and the burning of hot coal powder, further roasting oxidation, temperature is elevated to about 1250 ℃, enter central cooler again, through central cooler slewing equipment and high temperature pelletizing waste-heat recovery device, pelletizing is through further oxidation and cooling, be cooled to more than 100 ℃ gradually from 1250 ℃, discharge finished product acid pellet at last, as iron-smelting raw material near normal temperature.
The utility model with general grate kiln-central cooler technology recycling residual heat method comparison advantage is: improve hot blast temperature and the heat energy that central cooler reclaims on the one hand, the high efficiente callback that increases the bed waste heat of combing is handled, and has improved waste heat recovery efficient; Improve UTILIZATION OF VESIDUAL HEAT IN efficient on the other hand, further reduce the coal-fired consumption of pellet production equipment, make pelletizing production energy saving technology reduction of discharging advantage be further strengthened.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is that the utility model pellet production equipment residual heat integrative is recycled hot air flow system
Among the figure, 1. drying grate; The bed dryer section 11. comb; The bed blasting drying period 111. comb; The bed down-draft drying zone 112. comb; The bed drying and preheating section waste heat recovery circulating fan 113. comb; The bed drying and preheating section bellows 114. comb; The bed drying and preheating section fan housing 115. comb; The bed preheating section 12. comb; The bed preheating is 1 section 121. comb; The bed preheating is 2 sections 122. comb; The bed drying and preheating section waste heat recovery circulating fan 123. comb; The bed waste heat recovery section 13. comb; 131. reclaim 1 section; 132. reclaim 2 sections; 133. reclaim 3 sections; The bed waste heat recovery circulating fan 134. comb; The bed waste heat recovery bellows 135. comb; The bed waste heat recovery fan housing 136. comb; The bed 14. comb; 15. dust reclaims; 2. rotary kiln; 21. rotary kiln slewing equipment; 22. hot coal powder; 23. heat exchanger; 24. cold coal dust; 25. dust arrester; 3. central cooler; 31. central cooler high temperature pelletizing waste-heat recovery device; 311. encircle cold 1 section; 312. encircle cold 2 sections; 313. encircle cold 3 sections; 314. encircle cold 4 sections; 315. encircle cold 5 sections; 316. central cooler waste heat recovery circulating fan; 317. central cooler waste heat recovery bellows; 318. central cooler waste heat recovery fan housing; 4. green-ball; 32. central cooler slewing equipment; 41. dry bulb; 42. acid pellet; 5. cold air; 51. central cooler time high-temperature residual heat wind; 52. central cooler high-temperature residual heat wind; 53. rotary kiln high-temperature hot-air; 54. drying grate high-temperature residual heat wind; 55. warm waste heat wind in the drying grate; 56. drying grate low temperature exhaust heat wind; 57. discharging low temperature exhaust heat wind.
The specific embodiment
(concrete condition of B4.5 * 60m) describes the utility model specific embodiment at 2,400,000 tons of drying grates.
As shown in Figure 1, pellet production equipment residual heat integrative of the present utility model is recycled hot air flow system, and partly comprise at drying grate: drying grate 1 part comprises: the bed dryer section 11 of combing, the bed preheating section 12 of combing, the bed waste heat recovery section 13 of combing, the bed 14 of combing, dust reclaim 15.The bed dryer section 11 of combing comprises: the bed blasting drying period 111 of combing, the bed down-draft drying zone 112 of combing.The bed preheating section 12 of combing comprises: 1 section 121 of the preheating of bed of combing, 2 section 122 of the bed preheating of combing.Comb bed below is drying and preheating section bellows 114, is drying and preheating section fan housing 115 above the bed of combing.The bed waste heat recovery section 13 of combing comprises: reclaim 1 section 131, reclaim 2 section 132, reclaim 3 section 133.Comb bed 14 belows are waste heat recovery bellows 135, and bed 14 tops of combing are waste heat recovery fan housings 136.Link to each other by the to comb bellows 114 of 1 section 121 of a preheating of bed, the bed down-draft drying zone 112 of combing and bellows 114 of a blasting drying period 111 of combing of the bed drying and preheating section waste heat recovery circulating fan 113 of combing.Link to each other with the fan housing 115 of a down-draft drying zone 112 of combing by the to comb fan housing 136 of 2 section 122 bellows 114 of bed preheating, 1 section 131 of the bed waste heat recovery of combing of the bed preheating section waste heat recovery circulating fan 123 of combing.Link to each other by the bed waste heat recovery circulating fan 134 of combing 1 section 131 the bellows 135 of bed waste heat recovery of to comb with 2 sections of recovery.
In the pelletizing course of conveying, the hot air flow system particular content is:
(1) the high temperature pelletizing waste heat high efficiente callback hot blast stream subsystem of central cooler part.Carry by three central cooler waste heat recovery circulating fans 316, cold air 5 enters cold 5 section 315 bellows of central cooler ring 317, successively respectively through cold 4 section 314 of ring, cold 3 section 313 of ring, cold 2 section 312 and encircle cold 1 section 311 of ring, through with five heat exchanges of pelletizing after, discharge directly enters rotary kiln 2 near 1000 ℃ of central cooler high-temperature residual heat wind 51, as the hot-air of rotary kiln coal dust firing.In addition, after hot blast and the 4th heat exchange of pelletizing, near 800 ℃ of left and right sides central coolers time high-temperature residual heat wind 51, flow to 1 section 121 of grate bed green-ball preheating by bellows 317 discharge sections.
(2) the high temperature comb bed waste heat high efficiente callback hot blast stream subsystem of drying grate part.Carry by the bed waste heat recovery circulating fan 134 of combing, part drying grate low temperature exhaust heat wind 56 is introduced the comb bellows 135 of 3 section 133 of bed waste heat recovery of the bed backhaul sections of combing, successively respectively through 2 section 132 of the bed waste heat recovery of combing, 1 section 131 of comb bed waste heat recovery, the hot blast process and three heat exchanges of bed of combing, discharge near 500 ℃ of drying grate high-temperature residual heat wind 54 from the comb fan housing 136 of 1 section 131 of bed waste heat recovery of the bed backhaul section of combing, as the thermal source of drying grate down-draft drying zone 112, flow to the fan housing 115 of down-draft drying zone 112 by the bed dryer section waste heat recovery circulating fan 113 of combing equally.
(3) the preheating and drying section heat recycling hot blast stream subsystem of drying grate part.Three aspects are arranged: the one, the rotary kiln high-temperature hot-air 53 that rotary kiln 2 kiln tails produce directly enters the fan housing 115 of 2 section 122 of preheating, through blower fan 123 and 113 swabbing actions, after hot blast and pelletizing and the bed heat exchange of combing, flow to the fan housing 115 of down-draft drying zone 112 by the drying grate high-temperature residual heat wind 54 of bellows 114 discharges; The 2nd, central cooler 3 ring is discharged the fan housing 115 that central cooler time high-temperature residual heat wind-heat wind 51 flows to 1 section 121 of drying grate preheating for cold 2 section 312, through blower fan 113 swabbing actions, after hot blast and pelletizing and the bed heat exchange of combing, flow to the bellows 114 of blasting drying period 111 by warm waste heat wind 55 in the drying grate of bellows 114 discharges; The 3rd, down-draft drying zone 112 is in blower fan 123 swabbing actions, after drying grate high-temperature residual heat wind 54 and pelletizing and the bed heat exchange of combing, warm waste heat wind 55 flows to blasting drying period 111 in the same discharge drying grate, hot blast once more through with comb bed and pelletizing heat exchange after, at last by the about 100 ℃ of left and right sides drying grate low temperature exhaust heat wind 56 of fan housing 115 discharges.
(4) the pulverized coal preheating hot blast stream subsystem of rotary kiln part.Two aspects are arranged: the one, central cooler high-temperature residual heat wind 52 directly enters rotary kiln 2, as the hot-air of hot coal powder 22 burnings, 22 burnings of process hot coal powder and dry bulb are rolled into a ball the rotary kiln high-temperature hot-air 53 that produces after 41 oxidations and are directly entered 2 section 122 of grate bed green-ball preheating; The 2nd, blasting drying period 111 is discharged about 100 ℃ of left and right sides drying grate low temperature exhaust heat wind 56 parts introduce gas-solid two-phase separate heat exchanger 23, make cold coal dust 24 be heated to 80 ℃ of left and right sides hot coal powder 25, spray into rotary kiln 2, efficient fully burning, the more low temperature hot waste gas of heat exchanger 23 discharges simultaneously, after dust arrester 25 dust removal process, at last to airborne release low temperature exhaust heat wind 57.
Claims (3)
1. a pellet production equipment residual heat integrative is recycled hot air flow system, it is characterized in that: hot air flow system comprises the high temperature pelletizing waste heat high efficiente callback hot blast stream subsystem of central cooler part, and the pulverized coal preheating hot blast of a high temperature comb bed waste heat high efficiente callback hot blast stream subsystem, drying grate preheating and drying section heat recycling hot blast stream subsystem and the rotary kiln part of drying grate part flows subsystem four parts and forms.
2. a kind of pellet production equipment residual heat integrative recycling hot air flow system according to claim 1 is characterised in that: the bed waste heat recovery section (13) of combing comprises recovery 1 section (131), recovery 2 sections (132), 3 sections (133) of recovery; Comb bed (14) below is waste heat recovery bellows (135), is waste heat recovery fan housing (136) above the bed (14) of combing; Link to each other by the to comb bellows (135) of bed waste heat recovery 1 section (131) and recovery 2 sections (132) of the bed waste heat recovery circulating fan (134) of combing.
3. a kind of pellet production equipment residual heat integrative according to claim 1 is recycled hot air flow system, is characterised in that: central cooler high temperature pelletizing waste-heat recovery device (31) comprises ring cold 1 section (311), ring cold 2 sections (312), ring cold 3 sections (313), ring cold 4 sections (314), ring cold 5 sections (315); Central cooler slewing equipment (32) below is central cooler waste heat recovery bellows (317), and the top is a central cooler waste heat recovery fan housing (318); Three central cooler waste heat recovery circulating fans (316), cool exterior air (5) is introduced the bellows (317) of ring cold 5 sections (315), hot blast (51) is drawn, and will encircle cold 1 section (311) and link to each other with the bellows (317) of ring cold 2 sections (312), the bellows (317) that encircle cold 3 sections (313), ring cold 4 sections (314) are continuous.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200432940U CN201508114U (en) | 2009-06-26 | 2009-06-26 | Comprehensive residual heat-recycling hot air flow system for pellet production facilities |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009200432940U CN201508114U (en) | 2009-06-26 | 2009-06-26 | Comprehensive residual heat-recycling hot air flow system for pellet production facilities |
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| CN201508114U true CN201508114U (en) | 2010-06-16 |
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| CN2009200432940U Expired - Fee Related CN201508114U (en) | 2009-06-26 | 2009-06-26 | Comprehensive residual heat-recycling hot air flow system for pellet production facilities |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252530A (en) * | 2011-07-15 | 2011-11-23 | 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 |
| CN108895849A (en) * | 2018-08-30 | 2018-11-27 | 中冶长天国际工程有限责任公司 | Ring cold machine and its heat dissipation recycling component and method, oxide pellet Preparation equipment |
| CN109028958A (en) * | 2018-08-30 | 2018-12-18 | 中冶长天国际工程有限责任公司 | Drying grate and its heat dissipation recycling component and method, oxide pellet Preparation equipment |
-
2009
- 2009-06-26 CN CN2009200432940U patent/CN201508114U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252530A (en) * | 2011-07-15 | 2011-11-23 | 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 |
| CN108895849A (en) * | 2018-08-30 | 2018-11-27 | 中冶长天国际工程有限责任公司 | Ring cold machine and its heat dissipation recycling component and method, oxide pellet Preparation equipment |
| CN109028958A (en) * | 2018-08-30 | 2018-12-18 | 中冶长天国际工程有限责任公司 | Drying grate and its heat dissipation recycling component and method, oxide pellet Preparation equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100616 Termination date: 20140626 |
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| EXPY | Termination of patent right or utility model |