CN107702546B - Sinter continuous cooling system - Google Patents
Sinter continuous cooling system Download PDFInfo
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- CN107702546B CN107702546B CN201711054674.XA CN201711054674A CN107702546B CN 107702546 B CN107702546 B CN 107702546B CN 201711054674 A CN201711054674 A CN 201711054674A CN 107702546 B CN107702546 B CN 107702546B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention relates to a sinter continuous cooling system, which comprises a belt cooling type sinter cooling system and a shaft furnace sinter cooling system; the cooling system of the belt-cooling type sintering ore consists of a belt-cooling type high-temperature hot ore continuous conveyor, an air cooling system and a waste heat recovery device; the shaft furnace type sinter cooling system comprises a vertical cooling furnace, a circulating air duct, a circulating fan, a waste heat boiler and a generator set; the continuous conveyor with the cold high temperature mineral is arranged between the exhaust belt type sintering machine and the vertical cooling furnace, a distributor is arranged at the tail discharging end of the continuous conveyor with the cold high temperature mineral, the distributor is provided with 2 discharging chute, the discharging port of one discharging chute is positioned right above the feeding port of the vertical cooling furnace, and the discharging port of the other discharging chute is positioned right above the cold mineral conveyor; and flap valves are arranged above the 2 discharging chute. The 2 sets of cooling systems share the continuous conveyor with the cold type high-temperature hot ores, and can be switched between 2 working modes; the equipment operation rate is improved, and the engineering investment is saved.
Description
Technical Field
The invention relates to the technical field of hot sinter cooling, in particular to a sinter continuous cooling system.
Background
In the early stage, a blast type annular cooling or cooling process (such as a low-emission sinter cooling system disclosed in China patent application No. 201220201970 and a fully-sealed circulating cooler for clinker production disclosed in China patent application No. 200710061470.9) is generally adopted for cooling hot sinter, and due to relatively low heat recovery efficiency and environmental protection level of the blast type annular cooling or cooling process, a relatively advanced shaft furnace type sinter cooling system (such as a sinter sensible heat recovery device disclosed in China patent application No. 2015125883. X) appears in the later stage.
At present, a shaft furnace type sinter cooling system is often adopted by sinter production enterprises as a main process system for sinter cooling, and a blast type ring cooling or belt cooling system is adopted as a standby system.
The Chinese patent with the application number of 201310127743.0 discloses a mineral aggregate system for efficiently recovering waste heat of a furnace-type cooling sinter, wherein a material taking valve is arranged below a single-roller crusher at the ore outlet end of a sintering machine and is arranged at the joint of a blanking chute of a ring cooling system and the upper end of a material taking chute of the furnace-type cooling system, and the material taking valve can be switched between the blanking chute of the ring cooling system and the material taking chute of the furnace-type cooling system; the two cooling systems are mutually standby, so that the operation rate of the agglomerate cooling system is improved.
The chinese patent with application No. 201610051600.X discloses a method for taking high-temperature sintered ore and a taking device thereof, wherein a taking chute and a receiving chute are respectively arranged at the bottom and the side wall of a hot ore storage bin, the high-temperature sintered ore material slides into the taking chute preferentially, and by means of the inlet height difference between the receiving chute and the taking chute, the high Wen Kuangliao is controlled to be switched between a circular cooler and a vertical cooler in real time by inserting or extracting a needle-shaped gate valve at the tail end of the taking chute.
The Chinese patent with application number 201320185417.0 discloses a high-temperature sintered ore transferring device, a flap valve is arranged below a single-roller crusher, the bottom of the flap valve is arranged at the joint of a ring cooling/belt cooling system discharging chute and a furnace cooling system discharging chute, and the flap valve can be switched between the ring cooling/belt cooling system discharging chute and the furnace cooling system discharging chute.
According to the technical scheme, the purposes of improving the operation rate of the sintering machine and ensuring continuous and stable production of the sintering ore are achieved, but the annular cooling/belt cooling system is started only when the furnace cooling system is in fault or annual repair, the annual operation rate is only about 7%, the equipment cold idle time is too long, and serious waste of resources is caused.
Disclosure of Invention
The invention provides a sinter continuous cooling system, which is provided with a belt type and shaft furnace type 2 sets of sinter cooling systems, wherein the 2 sets of systems share a belt cooling type high-temperature hot mineral continuous conveyor in the belt type sinter cooling system and can be switched among 2 working modes; the equipment operation rate is improved, the engineering investment is saved, and the maximization of resource utilization is realized.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
a sinter continuous cooling system comprises a belt cooling type sinter cooling system and a shaft furnace type sinter cooling system; the cooling system of the belt-cooling type sintering ore consists of a belt-cooling type high-temperature hot ore continuous conveyor, an air cooling system and a waste heat recovery device; the shaft furnace type sinter cooling system comprises a vertical cooling furnace, a circulating air duct, a circulating fan, a waste heat boiler and a generator set; the continuous conveyor with the cold high temperature hot mineral is arranged between the exhaust belt type sintering machine and the vertical cooling furnace, a distributor is arranged at the tail discharging end of the continuous conveyor with the cold high temperature hot mineral, the distributor is provided with 2 discharging chute, the discharging port of one discharging chute is positioned right above the feeding port at the top of the vertical cooling furnace, and the discharging port of the other discharging chute is positioned right above the cold mineral conveyor; and flap valves are arranged above the 2 discharging chute.
The high-temperature gas outlet of the vertical cooling furnace is connected with the high-temperature gas inlet of the waste heat boiler through a circulating air duct, the steam outlet of the waste heat boiler is connected with the steam inlet of the steam turbine, and the steam turbine is additionally connected with the generator; the gas outlet of the waste heat boiler is connected with the circulating cooling air inlet of the vertical cooling furnace; the circulating air duct is also provided with a dust removing device and a circulating fan.
The continuous conveyer with the cold type high-temperature hot mineral is composed of a driving device and a plurality of monomer trolley units which are connected end to end, wherein the monomer trolley is driven by the driving device, and the bottom of the monomer trolley is provided with a grate bar or a grate bar plate.
The air cooling system consists of a dust cover, an exhaust tube box, an exhaust main tube and a return main tube; the dust cover covers the whole cold-type high-temperature hot-mineral continuous conveyor along the material conveying direction of the cold-type high-temperature hot-mineral continuous conveyor, and the tail discharging end of the cold-type high-temperature hot-mineral continuous conveyor is covered on the upper part of the distributor; the exhaust pipe box is arranged below the loading surface of the cold-type high-temperature hot-mineral continuous conveyor, and a plurality of exhaust branch pipes are uniformly distributed at the lower part of the exhaust pipe box; the exhaust branch pipe is communicated with the exhaust main pipe through a converging pipe; the exhaust main pipe is additionally connected with a waste heat recovery device; one end of the return main pipe is connected with the waste heat recovery device, and the other end of the return main pipe is arranged above the dust cover along the material conveying direction of the belt-cooling type high-temperature hot-mineral continuous conveyor and is communicated with the dust cover through a plurality of return branch pipes.
The waste heat recovery device comprises a dust remover, a heat exchanger and a fan which are sequentially connected through a hot air pipeline, one end of the hot air pipeline is connected with an air draft main pipe, and the other end of the hot air pipeline is connected with a return main pipe.
The distributor comprises a receiving hopper and 2 discharging chute arranged at the bottom of the receiving hopper, wherein the discharging holes of the 2 discharging chute extend to two sides below the receiving hopper in an inclined mode respectively, and the included angles between the 2 discharging chute and a horizontal line are not smaller than 40 degrees.
Compared with the prior art, the invention has the beneficial effects that:
1) The continuous conveyor with the cold type high-temperature hot ores is used as main equipment of a cooling system with the cold type sintering ores and as transportation equipment of the hot sintering ores in the cooling system of the shaft furnace sintering ores, so that the continuous conveyor with the cold type high-temperature hot ores has multiple purposes, improves the equipment operation rate and avoids resource idle waste;
2) The whole process production of a double system with a shaft furnace type sinter cooling system as a standby is realized, and the reliability of the sinter cooling system is greatly improved;
3) The sinter cooling system adopts 2 working modes, is convenient to switch and has stronger maneuverability;
4) After the equipment is shared, the overall layout is more reasonable, and the occupied area is reduced.
Drawings
FIG. 1 is a schematic diagram of a continuous cooling system for sinter according to the invention.
In the figure: 1. exhaust belt sintering machine 2, belt cooling type high temperature hot mineral continuous conveyor 3, receiving hopper 4, discharging chute 5, flap valve 6, shaft furnace type sinter cooling system 61, vertical cooling furnace 62, dust removing device 63, waste heat boiler and generator set 64, circulating fan 7, exhaust pipe box 8, exhaust branch pipe 9, converging pipe 10, exhaust main pipe 11, waste heat recovery device 12, return main pipe 13, dust cover 14, return branch pipe 15, cold mineral conveyor
Detailed Description
The following is a further description of embodiments of the invention, taken in conjunction with the accompanying drawings:
as shown in fig. 1, the sinter continuous cooling system of the invention comprises a belt cooling type sinter cooling system and a shaft furnace sinter cooling system 6; the cooling system of the belt-cooling type sintering ore consists of a belt-cooling type high-temperature hot ore continuous conveyor 2, an air cooling system and a waste heat recovery device 11; the shaft furnace type sinter cooling system 6 comprises a vertical cooling furnace 61, a circulating air duct, a circulating fan 64, a waste heat boiler and a generator set 63; the continuous conveyor 2 with the cold type high-temperature hot mineral is arranged between the exhaust belt type sintering machine 1 and the vertical cooling furnace 61, a distributor is arranged at the tail discharging end of the continuous conveyor 2 with the cold type high-temperature hot mineral, the distributor is provided with 2 discharging chute 4, the discharging port of one discharging chute 4 is positioned right above the feeding port at the top of the vertical cooling furnace 61, and the discharging port of the other discharging chute 4 is positioned right above the cold mineral conveyor 15; and a flap valve 5 is arranged above the 2 discharging chute 4.
The high-temperature gas outlet of the vertical cooling furnace 61 is connected with the high-temperature gas inlet of the waste heat boiler through a circulating air channel, the steam outlet of the waste heat boiler is connected with the steam inlet of a steam turbine, and the steam turbine is additionally connected with a generator; the gas outlet of the waste heat boiler is connected with the circulating cooling air inlet of the vertical cooling furnace 61; the circulating air duct is also provided with a dust removing device 62 and a circulating fan 64.
The continuous conveyer 2 for the hot mineral with the cold type is composed of a driving device and a plurality of monomer trolleys which are connected end to end, wherein the monomer trolleys are driven by the driving device, and the bottoms of the monomer trolleys are provided with grate bars or grate bar plates.
The air cooling system consists of a dust cover 13, an exhaust pipe box 7, an exhaust main pipe 10 and a return main pipe 12; the dust cover 13 covers the whole cold-type high-temperature hot mineral continuous conveyor 2 along the material conveying direction of the cold-type high-temperature hot mineral continuous conveyor 2, and covers the upper part of the distributor at the tail discharging end of the cold-type high-temperature hot mineral continuous conveyor 2; the exhaust pipe box 7 is arranged below the loading surface of the cold-type high-temperature hot mineral continuous conveyor 2, and a plurality of exhaust branch 8 pipes are uniformly distributed at the lower part of the exhaust pipe box 7; the exhaust branch pipe 8 is communicated with an exhaust main pipe 10 through a converging pipe 9; the main exhaust pipe 10 is additionally connected with a waste heat recovery device 11; one end of the main return pipe 12 is connected with the waste heat recovery device 11, and the other end is arranged above the dust cover 13 along the material conveying direction of the continuous conveyor 2 with cold type high temperature hot ores and is communicated with the dust cover 13 through a plurality of return branch pipes 14.
The waste heat recovery device 11 comprises a dust remover, a heat exchanger and a fan which are sequentially connected through a hot air pipeline, one end of the hot air pipeline is connected with an air draft main pipe 10, and the other end of the hot air pipeline is connected with a return main pipe 12.
The distributor comprises a receiving hopper 3 and 2 discharging chute 4 arranged at the bottom of the receiving hopper 3, wherein the discharging ports of the 2 discharging chute 4 extend obliquely to two sides below the receiving hopper 3 respectively, and the included angles between the 2 discharging chute 4 and a horizontal line are not smaller than 40 degrees.
According to the continuous cooling method for the sinter, disclosed by the invention, a belt type sinter cooling system and a shaft furnace type sinter cooling system 6 are combined, and the following 2 modes are adopted to realize continuous efficient cooling and waste heat recovery of the hot sinter:
1) Normal operation mode:
in the mode, a shaft furnace type sinter cooling system 6 is adopted to realize cooling and waste heat recovery of hot sinter; the strand sinter cooling system is in a standby state; the belt-cooling type high-temperature hot mineral continuous conveyor 2 in the belt-type sintering mineral cooling system is simultaneously used as a hot sintering mineral conveying device of the shaft furnace type sintering mineral cooling system 6, and at the moment, an air cooling system on the belt-cooling type high-temperature hot mineral continuous conveyor 2 does not operate and only plays a role in conveying materials;
the hot sinter from the exhaust belt type sintering machine 1 is conveyed to a distributor by a belt-cooled high-temperature hot-mineral continuous conveyor 2, and the distributor is provided with 2 discharging chute 4, and the corresponding discharging ports of the discharging chute 4 are respectively positioned right above a cold-mineral conveyor 15 and a vertical cooling furnace; a flap valve 5 is arranged above the discharging chute 4, and hot sinter is filled into a vertical cooling furnace; in the vertical cooling furnace, the hot sinter is fully heat-exchanged with the circulating gas for cooling to be cooled, and the circulating gas absorbing heat generates high-temperature steam by using a waste heat boiler, so that the heat of the hot sinter is efficiently recovered; a dust cover 13 is arranged above the continuous conveyor 2 with the cold type high-temperature hot ores, and dust generated in the transferring process of the hot sinter is effectively controlled and purified under the action of a dust removing device connected with the dust cover 13;
2) Service or failure mode:
when the shaft furnace type sinter cooling system 6 overhauls or fails, the vertical cooling furnace 61, the dust removing device 62, the waste heat boiler and the generator set 63 in the shaft furnace type sinter cooling device 6 stop running, and the belt type sinter cooling system starts to run; at this time, the continuous conveyor 2 with cold high temperature hot mineral continues to run, and an air cooling system is started, low temperature gas from the waste heat recovery device 11 is sent into the dust cover 13 on the continuous conveyor 2 with cold high temperature hot mineral under the power provided by the waste heat recovery device 11, passes through the hot sinter material layer, absorbs sensible heat of the hot sinter, and hot air is sent to the waste heat recovery device 11 to effectively recover heat carried by the hot sinter material; the cooled sinter enters a distributor at the tail of the continuous conveyor 2 with cold high temperature mineral, and is discharged to a cold mineral conveyor 15 under the coordination guiding action of a discharging chute 4 and a flap valve 5.
When the shaft furnace sinter cooling system 6 is finished overhauling or is out of order, the operation mode is switched back to the normal operation mode.
The belt-type sinter cooling system adopts a circulating system and has a certain sealing property, so that high-temperature waste gas can be prevented from escaping outwards; when the device runs, the exhaust pipe box 7 starts to exhaust and cool hot sinter on the single trolley, and generated hot waste gas is collected into the exhaust main pipe 10 through the exhaust branch pipe 8 and the converging pipe 9 and then is sent into the waste heat recovery device 11 to recover heat in the waste gas; the waste heat recovery device 11 provides power to recycle the waste gas cooled after recovering heat above the hot sinter in the dust cover 13 through the main return pipe 12 and the branch return pipe 14.
The shaft furnace type sinter cooling system 6 is a closed circulation system, gas circulates in the system under the action of a circulating fan, hot gas enters a waste heat boiler to generate steam to drive a generator to generate power, and cooled gas enters a vertical cooling furnace again to be used as cooling gas.
The distributor guides the sintered ore to a vertical cooling furnace (hot sintered ore) or a cold ore conveyor 15 (cooled sintered ore) by opening and closing the corresponding flap valve 5.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (4)
1. A sinter continuous cooling system comprises a belt cooling type sinter cooling system and a shaft furnace type sinter cooling system; the system is characterized in that the cooling system of the sinter with the cooling comprises a continuous conveyor of the high-temperature sinter with the cooling, an air cooling system and a waste heat recovery device; the shaft furnace type sinter cooling system comprises a vertical cooling furnace, a circulating air duct, a circulating fan, a waste heat boiler and a generator set; the continuous conveyor with the cold high temperature hot mineral is arranged between the exhaust belt type sintering machine and the vertical cooling furnace, a distributor is arranged at the tail discharging end of the continuous conveyor with the cold high temperature hot mineral, the distributor is provided with 2 discharging chute, the discharging port of one discharging chute is positioned right above the feeding port at the top of the vertical cooling furnace, and the discharging port of the other discharging chute is positioned right above the cold mineral conveyor; a flap valve is arranged above the 2 discharging chute; the continuous conveyer with the cold type high-temperature hot mineral is composed of a driving device and a plurality of monomer trolley groups which are connected end to end, wherein the monomer trolley is driven by the driving device, and the bottom of the monomer trolley is provided with a grate bar or a grate bar plate; the air cooling system consists of a dust cover, an exhaust tube box, an exhaust main tube and a return main tube; the dust cover covers the whole cold-type high-temperature hot-mineral continuous conveyor along the material conveying direction of the cold-type high-temperature hot-mineral continuous conveyor, and the tail discharging end of the cold-type high-temperature hot-mineral continuous conveyor is covered on the upper part of the distributor; the exhaust pipe box is arranged below the loading surface of the cold-type high-temperature hot-mineral continuous conveyor, and a plurality of exhaust branch pipes are uniformly distributed at the lower part of the exhaust pipe box; the exhaust branch pipe is communicated with the exhaust main pipe through a converging pipe; the exhaust main pipe is additionally connected with a waste heat recovery device; one end of the return main pipe is connected with the waste heat recovery device, and the other end of the return main pipe is arranged above the dust cover along the material conveying direction of the belt-cooling type high-temperature hot-mineral continuous conveyor and is communicated with the dust cover through a plurality of return branch pipes.
2. The continuous cooling system for sinter as claimed in claim 1, wherein the high temperature gas outlet of the vertical cooling furnace is connected with the high temperature gas inlet of the waste heat boiler through a circulating air duct, the steam outlet of the waste heat boiler is connected with the steam inlet of the steam turbine, and the steam turbine is additionally connected with the generator; the gas outlet of the waste heat boiler is connected with the circulating cooling air inlet of the vertical cooling furnace; the circulating air duct is also provided with a dust removing device and a circulating fan.
3. The continuous cooling system for sintered ore as claimed in claim 1, wherein the waste heat recovery device comprises a dust remover, a heat exchanger and a fan which are sequentially connected through a hot air pipe, wherein one end of the hot air pipe is connected with the main air suction pipe, and the other end is connected with the main return pipe.
4. The continuous cooling system for sinter as claimed in claim 1, wherein the distributor comprises a receiving hopper and 2 discharging chute arranged at the bottom of the receiving hopper, wherein the discharging ports of the 2 discharging chute extend obliquely to two sides below the receiving hopper respectively, and the included angles between the 2 discharging chute and the horizontal line are not smaller than 40 °.
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| CN201711054674.XA CN107702546B (en) | 2017-11-01 | 2017-11-01 | Sinter continuous cooling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711054674.XA CN107702546B (en) | 2017-11-01 | 2017-11-01 | Sinter continuous cooling system |
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| CN107702546A CN107702546A (en) | 2018-02-16 |
| CN107702546B true CN107702546B (en) | 2023-09-15 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108317865B (en) * | 2018-04-11 | 2023-12-22 | 北京艾瑞机械有限公司 | High-temperature material waste heat recovery station system and recovery method |
| CN113295011A (en) * | 2021-01-05 | 2021-08-24 | 中冶长天国际工程有限责任公司 | Sintering two-stage cooling waste heat recovery system |
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| CN106556258A (en) * | 2015-09-28 | 2017-04-05 | 宝钢工程技术集团有限公司 | Sintering mine sensible heat retracting device and its using method |
| CN106996700A (en) * | 2016-01-26 | 2017-08-01 | 宝山钢铁股份有限公司 | A kind of high temperature sintering ore deposit method for fetching and its feeding device |
| CN207528075U (en) * | 2017-11-01 | 2018-06-22 | 中冶焦耐(大连)工程技术有限公司 | A kind of sinter continuous cooling system |
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2017
- 2017-11-01 CN CN201711054674.XA patent/CN107702546B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201289314Y (en) * | 2008-10-14 | 2009-08-12 | 中国船舶重工集团公司第七○三研究所 | System for recirculating outlet flue gas of sintering device exhaust-heat boiler |
| 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 |
| CN106556258A (en) * | 2015-09-28 | 2017-04-05 | 宝钢工程技术集团有限公司 | Sintering mine sensible heat retracting device and its using method |
| CN106996700A (en) * | 2016-01-26 | 2017-08-01 | 宝山钢铁股份有限公司 | A kind of high temperature sintering ore deposit method for fetching and its feeding device |
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