CN101576351A - Vertical sinter ore cooling machine capable of efficiently recycling sensible heat of sinter ores - Google Patents
Vertical sinter ore cooling machine capable of efficiently recycling sensible heat of sinter ores Download PDFInfo
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- CN101576351A CN101576351A CNA2009100745136A CN200910074513A CN101576351A CN 101576351 A CN101576351 A CN 101576351A CN A2009100745136 A CNA2009100745136 A CN A2009100745136A CN 200910074513 A CN200910074513 A CN 200910074513A CN 101576351 A CN101576351 A CN 101576351A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a vertical sinter ore cooling machine capable of efficiently recycling the sensible heat of sinter ores, which pertains to the technical field of sintering equipment and is used for preventing air leak in the cooling course of sinter ores and effectively recycling the sensible heat of the sinter ores. The technical proposal of the invention is that: the cooling machine consists of a feeding part, a cooling part and a conveying part; the cooling part comprises a vertical closed body, a hot wind pipeline, a blower, as well as a hopper, an upper sealing valve, a pre-storing chamber, a lower sealing valve, a heat exchanging chamber, a wind distributing board, an isopiestic wind chamber and a discharging channel which are in sequence arranged on the body from top to bottom; an annular wind chamber is arranged between the pre-storing chamber and the heat exchanging chamber; the annular wind chamber is communicated with the hot wind pipeline; the isopiestic wind chamber is communicated with the blower; and wind shields and ore falling openings are distributed evenly on the wind distributing board . The vertical sinter ore cooling machine has the following advantages of: 1. an air leak rate near to 0; 2. improved gas-solid heat exchange efficiency of the cooling machine; 3. raised quality of the recycled hot air; and 4. being beneficial to increasing the utilization rate of exhaust-heat boilers. Based on the advantages, the vertical sinter ore cooling machine is expected to be used commonly as an upgraded replacement of the existing sinter cooling machine.
Description
Technical field
The present invention relates to a kind of agglomerating plant, particularly reduce air leak rate of air curtain, comprehensively promote the waste gas grade, stablize the sinter cooler of waste heat recovery heat source temperature, belong to the agglomerating plant technical field.
Background technology
The energy consumption of steel works sintering operation is only second to the ironmaking operation, is generally 10%～20% of iron and steel enterprise's total energy consumption.It is bigger that the energy consumption index of China's sintering circuit and advanced country compare gap, and the average energy consumption of sintering deposit per ton is wanted high 20kgce.Show that according to certain steel mill's thermal balance test data of Japan the sintering deposit sensible heat accounts for 28.2% in the heat of the sintering machine income, the waste gas sensible heat accounts for 31.8%.As seen, the emphasis of sintering plant waste heat recovery should be useless (cigarette) gas waste heat of sintering and sintering deposit (product) sensible heat, i.e. fume afterheat in the several bellows in sintering machine rear portion, and its temperature reaches the sensible heats that 300～350 ℃ and hot finished product ore deposit have, and temperature is about 750～800 ℃.
The heat sinter that obtains in the SINTERING PRODUCTION must could transport the Blast Furnace Ore groove to by ribbon conveyer through after the cooling of sinter cooler, smelts iron production.Usually the equipment that heat sinter is cooled off has two kinds of central cooler and belt-cooling machines.Heat sinter gets off from sintering machine tail, after overheated fragmentation and heat screening, enters in the cooler chassis of continuous operation, and the cold air that blasts with blower fan carries out exchange heat.In the meantime, the hot-air that comes out from cooler can be sent into and add hot water the waste heat boiler, then the steam that is produced is used for generating.Because the hot air temperature that cooler comes out changes (150-400 ℃) greatly, has brought very big inconvenience to waste heat recovery.The difficult point of sinter cooler waste gas heat utilization is at present: cooler air leak rate of air curtain height causes blower fan power consumption height, and conventional cooler waste-heat recovery device causes thermal pollution, hot-air grade and utilization rate of waste heat low.Therefore, how reducing the cooler air leak rate of air curtain is the emphasis that the sintering deposit sensible heat reclaims with improving heat source temperature.
At present, the cooler hot-air retracting device that is moving or studying mainly contains four kinds of single fan housings, air circulation-single fan housing, two fan housing, air circulation-two fan housings, and these device by utilizing waste heat rate of recovery are all lower.Even adopt the advanced subregion recovery and the mode of cascade utilization that the sintering deposit sensible heat is reclaimed, also be difficult to reach ideal effect.China national practical new-type patent " elastic packing central cooler " (patent No. 200720138255.X), can effectively eliminate the problem of leaking out that bring in cooler wearing and tearing slit, improve the operating efficiency of blower fan and the service life of sealing plate, improved the cooler operating rate, guaranteed that SINTERING PRODUCTION normally moves.But its maintenance workload is big, and fails fundamentally to solve a sintering deposit waste heat recovery rate difficult problem on the low side, so the sintering deposit cooling device of R and D high efficiente callback waste heat is extremely urgent.
Summary of the invention
Problem to be solved by this invention provides a kind of problem of leaking out that can effectively avoid in the sintering deposit cooling procedure, but can reduce the vertical sinter cooler of the high efficiente callback sintering deposit sensible heat of gas-solid heat transfer temperature difference again.
The alleged problem of the present invention is solved by following technical scheme:
But a kind of vertical sinter cooler of high efficiente callback sintering deposit sensible heat, its special feature is: it is made of feed part, cooling segment and defeated material part, described cooling segment comprises vertical enclosed body, hot-blast pipe line, blower fan and is arranged at hopper, the upper sealing valve of body, the chamber that prestores, lower seal valve, Heat Room, air distribution plate, isobaric air compartment and discharging channel from top to bottom, described prestoring is provided with annular air compartment between chamber and the Heat Room, annular air compartment is communicated with hot-blast pipe line, isobaric air compartment is communicated with blower fan, the uniform blast cap and the mine mouth that falls on the described air distribution plate.
But the vertical sinter cooler of above-mentioned high efficiente callback sintering deposit sensible heat also is provided with distributing device in the described body, distributing device is positioned at lower seal valve bottom, and the distributing device bottom is provided with blow tank.
But the vertical sinter cooler of above-mentioned high efficiente callback sintering deposit sensible heat, described feed part is made up of sintering deposit tank car and crane, and wherein the crane upper frame is positioned at hopper top; Described defeated material partly is a belt feeder, and belt feeder is positioned at the discharging channel bottom.
But the vertical sinter cooler of above-mentioned high efficiente callback sintering deposit sensible heat, described isobaric air compartment is provided with controllable register.
But the vertical sinter cooler of above-mentioned high efficiente callback sintering deposit sensible heat, the described top, chamber that prestores is provided with equalizing valve; The discharging channel discharge valve that is provided with suitable for reading, the discharging channel end opening is provided with blow-off valve.
The present invention is directed to normal sintering ore deposit cooler air leak rate of air curtain height causes the blower fan power consumption high and the hot-air grade is low with the low problem of utilization rate of waste heat cooler has been carried out breakthrough improvement, this vertical sinter cooler adopts huge central cooler or the belt-cooling machine of medium-sized heat exchange obturator replacement structure that sintering deposit is cooled off, can not only avoid the problem of leaking out in the sintering deposit cooling procedure effectively, and can also reduce by gas-solid heat transfer temperature difference, to improve the thermal efficiency of bulk cargo bed heat-exchange device, help recycling efficiently the sintering deposit sensible heat comprehensively.Advantage of the present invention is as follows: 1. air leak rate of air curtain reduces greatly: the air leak rate of air curtain of normal sintering ore deposit cooling device is up to 40～50%, and bigger air leak rate of air curtain makes that the power consumption of blower fan increases, environmental quality descends.Cooler of the present invention adopts airtight chamber that sintering deposit is cooled off, and good air-tightness makes its air leak rate of air curtain approach zero.2. cooling device gas-solid heat exchange efficiency improves: in the cooling device of normal sintering ore deposit, and the sintering deposit horizontal movement, refrigerating gas is sent into by the bottom of cooling device, and the exchange heat mode of the two is the distributary heat exchange.And the novel vertical sinter cooler adopts reverse heat-exchange, and sintering deposit enters from the top of heat exchanger, discharge the bottom; The cooling air from the bottom air distribution plate of cooler send into, top extracts out, so just realized reverse heat-exchange, heat exchange efficiency obtains bigger raising.3. the hot-air grade that reclaims improves: the temperature range of normal sintering ore deposit cooling device hot-air is bigger, from 150 ℃ to 400 ℃ distribution is arranged all, and so large-scale Temperature Distribution makes waste heat recovery very difficult.Use if the hot-air after all heat exchange is mixed the back, then the hot-air grade will reduce greatly, causes utilization rate of waste heat lower.If only that temperature is higher hot-air utilizes, then cooler waste heat recovery amount is few.The reverse heat-exchange of cooler of the present invention makes hot air temperature more stable, high efficiente callback sintering deposit sensible heat, and make the temperature of all outlet ports hot-air remain on 450～550 ℃ of so higher levels, exceed about 150 ℃ than conventional cooler outlet hot air temperature.4. help improving the waste heat boiler utilization rate: cooler floor space of the present invention is less, checkout gear that can supporting advanced person be used to detect, regulate and control the to prestore temperature, sintering deposit discharge temperature etc. of height, hot-air of chamber sintering deposit, thereby effectively reduce the fluctuation of air themperature, make that supporting with it waste heat boiler is stable, utilization rate of waste heat improves greatly.
Description of drawings
Fig. 1 is a schematic diagram of the present invention;
Fig. 2 is the A-A sectional drawing of Fig. 1;
Fig. 3 is that the B of Fig. 1 is to view;
Fig. 4 is an application example schematic diagram of the present invention.
Label is expressed as follows in the accompanying drawing: 1. hopper; 2. upper sealing valve; 3. the chamber prestores; 4. annular air compartment; 5. lower seal valve; 6. distributing device; 7. blow tank; 8. Heat Room; 9. air distribution plate; 9-1. blast cap; The mine mouth 9-2. fall; 10. isobaric air compartment; 11. discharging channel; 12. blow-off valve; 13. belt feeder; 14. discharge valve; 15. controllable register; 16. blower fan; 17. body; 18. hot-blast pipe line; 19. equalizing valve; 20. sintering deposit tank car; 21. crane; 22. deduster; 23. single waste heat boiler of pressing; 24. Steam Turbine; 25. condenser; 26. condensate pump; 27. oxygen-eliminating device; 28. feed pump; 29. cold-air flap; 30. diffuse door.
The specific embodiment
Referring to Fig. 1, Fig. 2, vertical sinter cooler of the present invention is made of feed part, cooling segment and defeated material part, cooling segment comprises vertical enclosed body 17, hot-blast pipe line 18, a blower fan 16 and is arranged at hopper 1, the upper sealing valve 2 of body, the chamber 3 that prestores, lower seal valve 5, Heat Room 8, air distribution plate 9, isobaric air compartment 10 and discharging channel 11 from top to bottom, prestore and be provided with annular air compartment 4 between chamber and the Heat Room, annular air compartment is communicated with hot-blast pipe line, and isobaric air compartment is communicated with blower fan.Heat sinter is sent into by the hopper on body top, discharges after the chamber that prestores, Heat Room cooling.The cooling air that blower fan is sent enters from the air distribution plate of body bottom, and after Heat Room heated up, hot-air was discharged by hot-blast pipe line 18 through annular air compartment 4 and reclaimed.Closed chamber reverse heat-exchange technology is adopted in this design, compares with the cooler distributary heat exchange of ordinary sinter ore deposit, and heat exchange efficiency obtains bigger raising, and good air-tightness makes its air leak rate of air curtain approach zero.
Referring to Fig. 1, Fig. 3, the uniform blast cap 9-1 and the mine mouth 9-2 that falls on the described air distribution plate 9, its Apoplexy cap can evenly be transported to Heat Room with the air-supply of blower fan, and cooled sintering deposit is then fallen by the mine mouth that falls, and discharges through discharging channel 11.
Still referring to Fig. 1, described feed part is made up of sintering deposit tank car 20 and crane 21, and wherein, the crane upper frame is positioned at hopper top, heat sinter is promoted and is moved to described cooler top through airtight sintering deposit tank car by crane, with heat sinter through the hopper chamber that prestores of packing into.Described defeated material partly is a belt feeder 13, and belt feeder is positioned at the discharging channel bottom, the discharging channel discharge valve 14 that is provided with suitable for reading, and the discharging channel end opening is provided with blow-off valve 12.Cold sinter by blow-off valve 12 is discharged is transported to blast furnace through belt feeder.
Still referring to Fig. 1, for making heat sinter cloth in Heat Room 8 even, also be provided with distributing device 6 in the body, distributing device is positioned at lower seal valve bottom, and the distributing device bottom is provided with blow tank 7.
Still referring to Fig. 1, the isobaric air compartment that is positioned at the body bottom is provided with in order to regulate the controllable register 15 of intake.The top, chamber that prestores that is positioned at body top is provided with equalizing valve 19.
The vertical sinter cooler course of work of the present invention is as follows: after the heat sinter that produces in the sintering machine sintering process (650-850 ℃) the broken and hot screening of heat earlier, promote and move to the top of sintering deposit cooler again by crane through airtight sintering deposit tank car (can adopt many tank cars to transport the heat sinter that sintering machine produces continuously), go into the chamber that prestores of sintering deposit cooler by hopper, enter Heat Room then and carry out reverse heat-exchange with the cooling air, after 3～6 minutes, the sintering deposit (100-150 ℃) of cooling is discharged to by the discharging channel valve that (withdrawal rate can be coordinated the heat sinter flow by automatic control system and be controlled on the belt feeder, guarantee the continuous production of sintering machine, and the cooldown rate of sintering deposit in cooler is to be controlled by air circulation the time of staying), be transported to blast furnace by belt feeder.The cooling air is sent into from cooler body bottom air distribution plate by blower fan, in Heat Room, carry out reverse heat-exchange with sintering deposit, 450～550 ℃ of hot-airs of discharging from Heat Room are recycled through hot-blast pipe line, the hot-air that reclaims can remain on 450～550 ℃ of so higher levels, exceeds about 150 ℃ than conventional cooler outlet hot air temperature.
Referring to Fig. 4, to be the present invention press the supporting use of waste heat boiler with single for this, the example that the sintering deposit sensible heat that reclaims is used to generate electricity.The hot-air that is reclaimed by vertical sinter cooler feeds single waste heat boiler 23 upper lateral parts of pressing by hot-blast pipe line 18 through deduster 22, single main steam ports of pressing the superheated steam of waste heat boiler generation through main steam line feeding condensing turbine group 24 drives generator for electricity generation by the condensing turbine group.The exhaust steam of discharging in the condensing turbine feeds condenser 25, and the condensed water of generation and external complement water are sent into oxygen-eliminating device 27 through condensate pump 26, and the water of deaerator storage tank supplies water for single waste heat boiler of pressing by feed pump 28.Diffuse through diffusing door 30 by single hot waste gas part of pressing waste heat boiler to discharge, and replenish a certain amount of cold wind from environment space and enter the isobaric air compartment 10 of sintering deposit cooler bottom, in order to heat of cooling sintering deposit through cold-air flap 29 and blower fan 16.
Claims (5)
1. but the vertical sinter cooler of a high efficiente callback sintering deposit sensible heat, it is characterized in that: it is by the feed part, cooling segment and defeated material part constitute, described cooling segment comprises vertical enclosed body (17), hot-blast pipe line (18), blower fan (16) and be arranged at the hopper (1) of body from top to bottom, upper sealing valve (2), chamber (3) prestores, lower seal valve (5), Heat Room (8), air distribution plate (9), isobaric air compartment (10) and discharging channel (11), described prestoring is provided with annular air compartment (4) between chamber and the Heat Room, annular air compartment is communicated with hot-blast pipe line, isobaric air compartment is communicated with blower fan, uniform blast cap (9-1) and the mine mouth that falls (9-2) on the described air distribution plate.
2. but the vertical sinter cooler of high efficiente callback sintering deposit sensible heat according to claim 1 is characterized in that: also be provided with distributing device (6) in the described body, distributing device is positioned at lower seal valve bottom, and the distributing device bottom is provided with blow tank (7).
3. but the vertical sinter cooler of high efficiente callback sintering deposit sensible heat according to claim 1 and 2 is characterized in that: described feed part is made up of sintering deposit tank car (20) and crane (21), and wherein the crane upper frame is positioned at hopper top; Described defeated material partly is a belt feeder (13), and belt feeder is positioned at the discharging channel bottom.
4. but the vertical sinter cooler of high efficiente callback sintering deposit sensible heat according to claim 3 is characterized in that: described isobaric air compartment is provided with controllable register (15).
5. but the vertical sinter cooler of high efficiente callback sintering deposit sensible heat according to claim 4 is characterized in that: the described top, chamber that prestores is provided with equalizing valve (19); The discharging channel discharge valve (14) that is provided with suitable for reading, the discharging channel end opening is provided with blow-off valve (12).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100745136A CN101576351A (en) | 2009-06-23 | 2009-06-23 | Vertical sinter ore cooling machine capable of efficiently recycling sensible heat of sinter ores |
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| CNA2009100745136A CN101576351A (en) | 2009-06-23 | 2009-06-23 | Vertical sinter ore cooling machine capable of efficiently recycling sensible heat of sinter ores |
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| CNA2009100745136A Pending CN101576351A (en) | 2009-06-23 | 2009-06-23 | Vertical sinter ore cooling machine capable of efficiently recycling sensible heat of sinter ores |
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| CN103234359A (en) * | 2013-04-15 | 2013-08-07 | 中信重工机械股份有限公司 | Sintering furnace type cooling device |
| CN103234361A (en) * | 2013-04-15 | 2013-08-07 | 中信重工机械股份有限公司 | Sintered ore cooling furnace |
| CN103234364A (en) * | 2013-04-15 | 2013-08-07 | 中信重工机械股份有限公司 | Device with griddle and process for generating power by efficiently recycling sinter waste heat |
| CN103234349A (en) * | 2013-04-15 | 2013-08-07 | 中信重工机械股份有限公司 | Furnace type cooling and heat exchange device for sintered ores |
| CN103234360A (en) * | 2013-04-15 | 2013-08-07 | 中信重工机械股份有限公司 | Device and process for transferring high temperature sintering ore |
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| CN105387730A (en) * | 2015-12-25 | 2016-03-09 | 宝钢工程技术集团有限公司 | Sintered ore sensible heat exchange device and method |
| CN106766943A (en) * | 2017-01-17 | 2017-05-31 | 华北水利水电大学 | A kind of vertical cooling furnace apparatus and cooling means of sintering deposit |
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