CN101597656B - High temperature furnace slag sensible heat power generating method - Google Patents
High temperature furnace slag sensible heat power generating method Download PDFInfo
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- CN101597656B CN101597656B CN2009100896776A CN200910089677A CN101597656B CN 101597656 B CN101597656 B CN 101597656B CN 2009100896776 A CN2009100896776 A CN 2009100896776A CN 200910089677 A CN200910089677 A CN 200910089677A CN 101597656 B CN101597656 B CN 101597656B
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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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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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention relates to a high temperature furnace slag sensible heat power generating method, belonging to the technical field of iron-making surplus heat utilization. The method comprises the processes of molding and combining high temperature furnace slag, exchanging heat, generating electricity, etc. A forming device is used for extruding the high temperature furnace slag into furnace slag checker bricks, and the furnace slag checker bricks are sent into an adiabatic furnace channel to be sequentially arranged and combined at the same intervals between the front and the rear furnace slag checker bricks; low-temperature flue gas enters into the furnace from an opening in front of an adiabatic furnace through a fan, and is heated up to be high-temperature flue gas by the high temperature furnace slag checker bricks; a furnace slag checker brick group is driven by a lower chain machine to do intermittent motion forward at regular time, the low-temperature furnace slag checker bricks arranged at the front row are sent out of the adiabatic furnace according to the time interval of 5-100min, and the newly molded high-temperature furnace slag checker bricks arranged at the rear row are synchronous with the low-temperature furnace slag checker bricks; after low-pressure and low-temperature vapor is heated to be high-temperature and high-pressure saturated vapor by the high-temperature flue gas through a surplus heat boiler, electric power is output by a steam turbine which does work by expansion; after heat exchange, the low-temperature flue gas flows back through the fan, and the discharged low-pressure vapor enters the surplus heat boiler for heating in a circulating way again after converging with low-pressure pipe network vapor.
Description
Technical field
The invention belongs to ironmaking UTILIZATION OF VESIDUAL HEAT IN technical field, a kind of high temperature furnace slag sensible heat power generating method particularly is provided, adopt slag moulding and checker brick heat transfer technology, realize the cascade utilization of Energy resources.
Technical background
Iron and steel is high energy consumption, the high pollution enterprise of China's industry, no matter is all to have very big waste heat complementary energy potentiality in operations such as ironmaking, sintering, coking, steel-making, steel rolling.On iron-smelting blast furnace, high temperature furnace slag sensible heat is recycled has bigger recycling space, and physics recovery of heat and chemical heat recovery method are arranged, and wherein dry granulation heat recovery technology and chemical heat recovery technology are the directions of giving priority to from now on.The physics recovery of heat is that a kind of heat recovery technology that essence changes, also do not make other material generation chemical reactions does not take place its chemical property of process of slag release of heat, utilizes hot water for slag flushing in blast furnace to heat to the Residential areas as Shoudu Iron and Steel Co, Anshan iron and steel plant etc.; Chemical heat reclaims, and to be slag change or make a kind of heat recovery technology of other material generation chemical reactions with its chemical property generation essence of process of slag release of heat, directly generates the production mineral wool as high-temperature slag.The dry granulation heat recovery technology belongs to the physics heat recovery technology, as the wind of the Ma Gang granulation technique of quenching the successful Application actual achievement has been arranged, and what foreign study was more is revolving cup method granulation technique.In addition, also have some semidrying technology, as being applied to the precious new 179m in Tangshan
3Blast furnace, Taiyuan Iron and Steel Co. 4# blast furnace (BF) expansion are transformed (1650m
3) wait the wheel method granulation technique of slag treatment system, can use continuous casting type waste heat boiler slag energy recovery technology after the slag particleization simultaneously.
Original employing flush slag is handled the technology of blast-furnace slag, although technological process is simple, adopts the wet method energy utilization rate low; although adopt revolving cup method granulation technique efficient height, need the fast rotational of high temperature furnace slag, need consumption of power bigger; technical economical inadequately, seldom practical application.
For reaching the cascade utilization of blast-furnace slag sensible heat; the present invention adopts the physics heat recovery method, is different from top dry granulation heat recovery technology, utilizes technology such as blast-furnace slag moulding and checker brick heat exchange; low-pressure low-temperature steam resource is heated to be high-pressure and high-temperature steam, and the pushing turbine generating.
Summary of the invention
The purpose of this invention is to provide a kind of high temperature furnace slag sensible heat power generating method, utilize the physics heat of high temperature furnace slag, is high temperature and high pressure steam with low-grade low-pressure low-temperature steam reforming, and the realization sensible heat is changed high-grade electric energy, satisfies self power generation and uses.
High temperature furnace slag sensible heat power generating method of the present invention comprises technological processs such as high temperature furnace slag moulding, combination, heat exchange and generating.It is characterized in that, utilize shaped device that the high temperature furnace slag extruding is the slag checker brick, send in the adiabatic stove passage, successively according to the order of sequence by front and back slag checker brick uniform distances permutation and combination, low-temperature flue gas enters in the stove from adiabatic stokehold face opening through blower fan, is heated to be high-temperature flue gas through the high temperature furnace slag checker brick; Slag checker brick group is driven by following chain making machine, and regularly to the previous crops geneva motion, front-seat low temperature slag checker brick were sent adiabatic stove by 5～100 minutes timed intervals, and the high temperature furnace slag checker brick of the new moulding of back row's increase are synchronous with it; After high-temperature flue gas is the High Temperature High Pressure saturation steam through waste heat boiler with the low-pressure low-temperature steam heating, through turbine expansion acting output power; Low-temperature flue gas refluxes by blower fan after the heat exchange, reenters waste heat boiler circulation heating after the low-pressure steam of discharging and low-pressure pipe network steam converge.
High temperature furnace slag sensible heat power generating method of the present invention, shaped device is made of high temperature resistant mould up and down, wherein bed die is the hollow square bucket, four limits are double-deck, and outer four limits are fixed, and interior four limits can move inward 5～10mm by the fixed turning axle, the mold side of being lid, lower surface is installed 4～8 row's high strength right cylinders, and every row 4-8, diameter is 20～40mm.
Temperature is 1300～1450 ℃ high temperature furnace slag is sent into shaped device by the slag pipeline a bed die, interior four limits compress, and are pressed into the slag checker brick through the mold right cylinder, utilize cylindrical rotation that mold is extracted, outwards move on four limits in the bed die, and the slag checker brick shift out.
Arrange 2～4 passages in the adiabatic stove, each passage is for being arranged side by side,, the front respectively links to each other with a valve, and each passage top furnace roof and both sides are made up of insulating refractory, and bottom is a chain making machine.
The high temperature furnace slag checker brick are placed on the chain of adiabatic stove passage, the time that chain moves at interval is 5～100 minutes, press interval 10～50mm on the chain apart from horizontal positioned high temperature furnace slag checker brick, the checkerwork cell direction is identical, for horizontal direction is arranged, quantity is 3～50, and slag checker brick and furnace roof and both sides spacing are 2～10mm.
Before and after adiabatic stove passage one flank side surface fire door is arranged all, the front is the outlet of slag checker brick, the back is slag checker brick inlet, in the stove slag checker brick travel forward spacing equal before and after two slag checker brick distances, the slag checker brick that are lower than 200 ℃ on the chain of front shift out the adiabatic stove time, and are consistent with the additional placement new compacting slag checker brick time of back.
Flue gas be intermittently heat exchange with the slag checker brick in the adiabatic stove passage, divides flue gas heat exchange phase, slag checker brick moving periods, and two cycles came and went circulates, and another flue gas heat exchange phase, slag checker brick of organizing passage are asynchronous with it moving period.Flue gas heat exchange is in the phase in the adiabatic stove passage, the front valve open; The slag checker brick are in moving period, and front valve closes, flue gas circulate and stop.
Temperature is 100～200 ℃ a discharging flue gas, enters adiabatic stove passage from the front, and with the reversing of motion of chain making machine, through high temperature furnace slag checker brick checkerwork cell, the high-temperature flue gas that is heated to be 1000～1300 ℃ of temperature enters waste heat boiler.High-temperature flue gas is that 100～200 ℃ of low-pressure steam are heated to be 350～550 ℃ of mesohigh steam with temperature, drives generator for electricity generation through turbine expansion.
After residual heat boiler for exchanging heat, temperature is 100～200 ℃ a flue gas, and refluxing through blower fan enters adiabatic stove interior passageway, and the steam of discharging links to each other with a recycle pump, converges back backflow waste heat boiler with the pipe network low-pressure steam.
Circulatory mediator-flue gas that slag checker brick heat exchange of the present invention is adopted also can adopt air, CO
2Etc. gas instead, the method that also can adopt gas fired-boiler to produce steam that does not have the low-pressure steam pipe network is substituted.
The present invention mainly utilizes checker brick moulding, heat exchange principle effectively to solve the sensible heat utilization problem of high temperature furnace slag, with the flush slag method relatively, energy utilization is more reasonable, quench with wind, method such as rotating cup relatively, have the following advantages:
1 effectively utilizes low temperature, low pressure residual heat resources.
Iron and steel enterprise's low-temperature flue gas and low-pressure steam often can't be utilized and discharge owing to the low problem of grade, and the discharging and the flue gas recirculation that can effectively solve low-pressure steam by this technology utilize problem.
2 heat exchanging process are simple, the heat exchange efficiency height.
Utilize the heat exchange of existing checker brick technology, the recovery that improves the slag sensible heat greatly, simultaneously, because the flue gas heat exchange coefficient is greater than air, so circulatory mediator adopts flue gas heat exchange effective, greater than having improved heat exchange efficiency.
3 improve slag sensible heat utilization rate
Adopt dry method recovery of heat high temperature furnace slag sensible heat, the organic efficiency height.
4 exploitativenesses are strong.
Utilize under the high temperature slag compression moulding is the slag checker brick, the slag checker brick are placed heat exchange in the adiabatic stove passage, the preheating low-temperature flue gas is a high-temperature flue gas rapidly, and it is convenient to implement.
5 can realize maximizing
This technical project is simple, and the design of can maximizing realizes the high temperature furnace slag sensible heat cascade utilization.
Description of drawings
Fig. 1 is a high temperature furnace slag sensible heat power generating schema of the present invention.
Fig. 2 is a high temperature furnace slag sensible heat power generating synoptic diagram of the present invention.Wherein, blast furnace 1, pressing unit 2, adiabatic stove 3, slag checker brick 4, chain making machine 5, valve 6, waste heat boiler 7, recycle pump 8, condenser 9, steam turbine 10, generator 11, valve 12, recirculation blower 13, valve 14 and blower fan 15.
Fig. 3 is the mold structural representation of pressing unit of the present invention.Wherein, right cylinder 16.
Fig. 4 is a slag checker brick schematic cross-section of the present invention.Wherein, checkerwork cell 17.
Fig. 5 is an adiabatic stove interior passageway system layout synoptic diagram of the present invention.Wherein, passage 18, passage 19, passage 20, valve 21, valve 22 and valve 23.
Embodiment
Fig. 2 is a kind of embodiment of high temperature furnace slag sensible heat power generating method of the present invention.
High temperature furnace slag sensible heat power generating of the present invention as shown in Figure 2, power generation system is made of blast furnace 1, pressing unit 2, adiabatic stove 3, slag checker brick 4, chain making machine 5, valve 6, waste heat boiler 7, recycle pump 8, condenser 9, steam turbine 10, generator 11, valve 12, recirculation blower 13, valve 14 and blower fan 15.The temperature that is generated by blast furnace 1 is that the right cylinder 16 of mold of 1300～1450 ℃ the repressed device 2 of high temperature furnace slag is compressed to slag checker brick 4 as shown in Figure 4.
Claims (7)
1. a high temperature furnace slag sensible heat power generating method comprises high temperature furnace slag moulding, combination, heat exchange and electrification technique as well as process; It is characterized in that, utilize shaped device that the high temperature furnace slag extruding is the slag checker brick, send in the adiabatic stove passage, successively according to the order of sequence by front and back slag checker brick uniform distances permutation and combination, low-temperature flue gas enters in the stove from adiabatic stokehold face opening through blower fan, is heated to be high-temperature flue gas through the high temperature furnace slag checker brick; Slag checker brick group is driven by following chain making machine, and regularly to the previous crops geneva motion, front-seat low temperature slag checker brick were sent adiabatic stove by 5～100 minutes timed intervals, and the high temperature furnace slag checker brick of the new moulding of back row's increase are synchronous with it; After high-temperature flue gas is the High Temperature High Pressure saturation steam through waste heat boiler with the low-pressure low-temperature steam heating, through turbine expansion acting output power; Low-temperature flue gas refluxes by blower fan after the heat exchange, reenters waste heat boiler circulation heating after the low-pressure steam of discharging and low-pressure pipe network steam converge;
Shaped device is made of high temperature resistant mould up and down, wherein bed die is the hollow square bucket, four limits are double-deck, outer four limits are fixed, interior four limits move inward 5～10mm by the fixed turning axle, and the mold side of being lid, lower surface are installed 4～8 row's high strength right cylinders, every row 4-8, diameter is 20～40mm;
Temperature is 1300～1450 ℃ high temperature furnace slag is sent into shaped device by the slag pipeline a bed die, interior four limits compress, and are pressed into the slag checker brick through the mold right cylinder, utilize cylindrical rotation that mold is extracted, outwards move on four limits in the bed die, and the slag checker brick shift out.
2. electricity-generating method according to claim 1 is characterized in that, arranges 2～4 passages in the adiabatic stove, and each passage is for being arranged side by side, and each links to each other the front with a valve, and each passage top furnace roof and both sides are made up of insulating refractory, and bottom is a chain making machine.
3. high temperature furnace slag sensible heat power generating method according to claim 1, it is characterized in that, the high temperature furnace slag checker brick are placed on the chain of adiabatic stove passage, the time that chain moves at interval is 5～100 minutes, by 10～50mm is apart from horizontal positioned high temperature furnace slag checker brick at interval, the checkerwork cell direction is identical on the chain, for horizontal direction is arranged, quantity is 3～50, and slag checker brick and furnace roof and both sides spacing are 2～10mm.
4. electricity-generating method according to claim 1, it is characterized in that, before and after adiabatic stove passage one flank side surface fire door is arranged all, the front is the outlet of slag checker brick, the back is slag checker brick inlet, in the stove slag checker brick travel forward spacing equal before and after two slag checker brick distances, the slag checker brick that are lower than 200 ℃ on the chain of front shift out the adiabatic stove time, replenish with the back that to place the new compacting slag checker brick time consistent.
5. electricity-generating method according to claim 1, it is characterized in that flue gas be the heat exchange at intermittence with the slag checker brick in the adiabatic stove passage, branch flue gas heat exchange phase, slag checker brick moving periods, two cycles came and went circulation, and flue gas heat exchange phase, the slag checker brick of another group passage are asynchronous with it moving period; Flue gas heat exchange is in the phase in the adiabatic stove passage, the front valve open; The slag checker brick are in moving period, and front valve closes, flue gas circulate and stop.
6. electricity-generating method according to claim 1 is characterized in that, temperature is 100～200 ℃ a discharging flue gas, enter adiabatic stove passage from the front, with the reversing of motion of chain making machine, through high temperature furnace slag checker brick checkerwork cell, the high-temperature flue gas that is heated to be 1000～1300 ℃ of temperature enters waste heat boiler; High-temperature flue gas is that 100～200 ℃ of low-pressure steam are heated to be 350～550 ℃ of mesohigh steam with temperature, drives generator for electricity generation through turbine expansion.
7. electricity-generating method according to claim 1 is characterized in that, after residual heat boiler for exchanging heat, temperature is 100～200 ℃ a flue gas, enter adiabatic stove interior passageway through the blower fan backflow, the steam of discharging links to each other with a recycle pump, converges back backflow waste heat boiler with the pipe network low-pressure steam.
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| CN2009100896776A CN101597656B (en) | 2009-07-28 | 2009-07-28 | High temperature furnace slag sensible heat power generating method |
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| CN2009100896776A CN101597656B (en) | 2009-07-28 | 2009-07-28 | High temperature furnace slag sensible heat power generating method |
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| CN101597656B true CN101597656B (en) | 2010-09-22 |
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| CN109464897B (en) * | 2018-10-25 | 2024-01-26 | 南京华电节能环保股份有限公司 | Comprehensive application system for flue gas desulfurization and denitrification waste heat recovery of coke oven |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6311522B1 (en) * | 1999-07-13 | 2001-11-06 | Slaytech Inc. | Process for casting and forming slag products |
| CN1804047A (en) * | 2006-01-19 | 2006-07-19 | 邯郸钢铁股份有限公司 | Method for reclaiming and cyclic utilizing residue molten steel slag in steel making |
| CN101153347A (en) * | 2007-05-22 | 2008-04-02 | 魏明 | System and technology for using exhaust heat of dross from ironmaking and steel-smelting by water quenching steam method |
| CN101187466A (en) * | 2007-11-17 | 2008-05-28 | 马福 | Furnace slag residual heat recovering device |
-
2009
- 2009-07-28 CN CN2009100896776A patent/CN101597656B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6311522B1 (en) * | 1999-07-13 | 2001-11-06 | Slaytech Inc. | Process for casting and forming slag products |
| CN1804047A (en) * | 2006-01-19 | 2006-07-19 | 邯郸钢铁股份有限公司 | Method for reclaiming and cyclic utilizing residue molten steel slag in steel making |
| CN101153347A (en) * | 2007-05-22 | 2008-04-02 | 魏明 | System and technology for using exhaust heat of dross from ironmaking and steel-smelting by water quenching steam method |
| CN101187466A (en) * | 2007-11-17 | 2008-05-28 | 马福 | Furnace slag residual heat recovering device |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平11-181508A 1999.07.06 |
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Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee before: Capital Iron & Steel General Company |
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