CN103060498A - Blast furnace cinder flushing water residual heat power generation system - Google Patents
Blast furnace cinder flushing water residual heat power generation system Download PDFInfo
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- CN103060498A CN103060498A CN2013100068067A CN201310006806A CN103060498A CN 103060498 A CN103060498 A CN 103060498A CN 2013100068067 A CN2013100068067 A CN 2013100068067A CN 201310006806 A CN201310006806 A CN 201310006806A CN 103060498 A CN103060498 A CN 103060498A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/074—Tower structures for cooling, being confined but not sealed
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
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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
- Y02P10/20—Recycling
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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
Abstract
The invention provides the improvement to a blast furnace water extraction cinder flushing technology, and discloses a system for generating electricity by fully recycling molten cinder residual heat. The system comprises an atmosphere-type thermosyphon cinder flushing tower an outlet end of which is sequentially connected with a dehydration device, a hot water tank with a filter, a hot water pump, a flash evaporator, a negative-pressure steam turbine and an asynchronous power generator; an air exhaust port of the negative-pressure steam turbine is connected with a wet-type air cooling condenser; the flash evaporator and a water exhaust port of the wet-type air cooling condenser are both connected with a cinder flushing water tank; and the cinder flushing water tank is connected with the atmosphere-type thermosyphon cinder flushing tower through a cinder flushing pump. The system converts low-grade heat energy into electricity energy by adopting a negative-pressure steam power generation technique so as to reduce investment and factory electricity consumption; the wet-type air cooling condenser is arranged at a high position, and a condensation water pump is not required to be arranged; and meanwhile, in order to solve the contradiction of discontinuity of the cinder flushing process and continuous operation of a power station, the system replaces a synchronous power generating set by adopting the asynchronous power generator, and can achieve the aims of initial investment and operation and maintain expense reduction and simple and easiness in control for the system.
Description
Technical field
The present invention relates to blast furnace water extraction slag flushing process technical field, especially a kind of abundant recovery melting slag waste heat is used for the system of generating.
Background technology
The blast furnace slag temperature can reach 1450 ℃ (heat enthalpy value is 1770KJ/kg), is containing huge residual heat resources, and establishing a blast furnace daily output quantity of slag is that 4050t/d(slag iron is than 0.35), melt heat that slag is with and will be 82965KW.How the efficient and rational blast furnace slag waste heat that utilizes is the steel industry technical barrier.
The blast furnace slag processing mode that has realized both at home and abroad industrial applications has three kinds of water extraction slags, dried slag, slag wool fiber, because water extraction slag has good chemically reactive, can be used as the cement high quality raw material, no matter therefore water extraction slag is from environmental protection and realizes the recycling economy angle, or from the angle of price reduction technique total energy consumption, all be the preferred manner that blast furnace slag is processed.Existing slag flushing process there is no how consideration reclaims the waste heat of slag, and in the flushing cinder process, a large amount of heats changes Low Temperature Steam into and is dissipated in the atmosphere, only has the heat about half to be retained in the flushing cinder water.
Because the water extraction slag heat recovery rate that existing defective workmanship causes is low, water temperature is low the using exhaust heat of slag flushing water utility value is had a greatly reduced quality, can only be used for winter heating.As use improved water extraction slag novel process that the present invention proposes that 80% melting slag waste heat is retained in the flushing cinder water, and water temperature can reach about 95 ℃, utilizes such hot water, uses negative pressure steam-electric power technology, can reach the thermo-efficiency more than 10%, low-grade heat energy like this is converted into electric energy.
Summary of the invention
The present invention is by organically combining simple, safe, the economic blast furnace slag flushing afterheat generating system that forms to the improvement of existing flushing cinder water system technique and advanced negative pressure steam-electric power technology.System reclaims heat that slag water extraction discharges and simplified system and reduce system energy consumption and three aspects of the assurance unit smooth running amount of setting about body personalized designs using exhaust heat of slag flushing water power generation system at utmost from maximum possible.
For realizing above purpose, the present invention has taked following technical scheme: a kind of blast furnace slag quenching water afterheat generating system, comprise the flasher, negative pressure steam turbine, wet type air-cooled condenser, flushing cinder pond and the flasher that connect and compose successively link circuit, described negative pressure steam turbine is connected to asynchronous generator, and asynchronous machine replaces synchronous machine and effectively solves the intermittent disadvantageous effect of flushing cinder process; Two pipelines are told in described flushing cinder pond, are connected to normal atmosphere thermal siphon flushing cinder tower by slag-washing-out pump and feeding spraying pump respectively; Normal atmosphere thermal siphon flushing cinder tower exit end connects the backflash steaming device by pipeline, is connected with dewatering unit, hot tub, hot water pump last time at this pipeline.Adopt negative pressure steam-electric power technology to realize flushing cinder steeping in water for reconstitution electricity, system configuration flasher and negative pressure saturated vapor turbine.
Be provided with filtration unit in the described hot tub.
Described wet type air-cooled condenser comprises the exhaust steam header, and the high efficient heat exchanging tube bank with predetermined arc that links to each other with the exhaust steam header, the other end of high efficient heat exchanging tube bank is connected with the condensed water header, below the high efficient heat exchanging tube bank, the recirculated water recooling plant is arranged, the V-type air inlet device, the recirculated water catch basin, the recirculated water catch basin is connected with cooling water circulation water pump, cooling water circulation water pump is connected by the shower that the shower drive unit drives with high efficient heat exchanging tube bank top by pipeline, above the high efficient heat exchanging tube bank, be provided with water separator, pod, establish induced draft fan in the pod, the wet type air-cooled condenser also comprises the water ring vacuum pump pumped vacuum systems with preposition pre-cooler, and is connected with controller by signal input output end.Wet type air-cooled condenser energy Lower early investment and working cost, minimizing floor space.
Described wet type air-cooled condenser adopts high-order the layout, thereby can save condensate pump
(1) in order fully to reclaim the heat of slag, slag flushing process is carried out following transformation:
1) replaces open prilling tower with ambient air pressure type thermal siphon flushing cinder tower.Utilize thermosiphon principle, the vapor partial pressure that the flushing cinder process is produced reaches 1 normal atmosphere, so that vapor temperature reaches about 100 ℃, thereby for using the direct contact heat transfer mode to create conditions more than the water temp. heating to 95 ℃.Ambient air pressure type thermal siphon flushing cinder tower structure as shown in Figure 3, this tower is cylindrical semiclosed tower body, normal atmosphere thermal siphon flushing cinder tower is by being divided into the hemi-closure space that a part of space that top communicates with emptying pipeline and bottom communicate with the molten slag groove import with the partition apparatus of relief door with the space, the relief door arranged beneath has shower, molten slag groove import below is slag case processed, the top of molten slag groove import is vapour collect cover, and vapour collect cover communicates with emptying pipeline.Be provided with relief door in the described normal atmosphere thermal siphon flushing cinder tower, partition apparatus by relief door is divided into the hemi-closure space that space that top communicates with emptying pipeline and bottom communicate with the molten slag groove import with the space, the relief door arranged beneath has shower, molten slag groove import below is equipped with the slag case, the top of molten slag groove import is vapour collect cover, and vapour collect cover communicates with emptying pipeline; Described slag case processed is connected with the pipeline at slag-washing-out pump place, and described shower is connected with the pipeline at described feeding spraying pump place.
2) cold and hot water separates to improve water temperature.System goes out saliva (can be described as hot water) with flushing cinder water (can be described as cold water) and flushing cinder tower and is stored in respectively in the different water reservoirs.
3) flushing cinder water yield control on demand.System will be processed shower nozzles in the slag case 33 adopt mode that grouping drops into to change the water yield with the variation of the quantity of slag, not only can save power consumption and can guarantee that prilling tower outlet water temperature keeps less fluctuation simultaneously in whole flushing cinder process.
(2) for reducing investment and power supply for station, power generation system is reformed, adopt the high-order wet type air-cooled condenser of arranging, system need not arrange condensate pump, in addition, native system adopts the water ring vacuum pump system with preposition condensation to replace water-jet pump, jetting case, water jet air ejector jetting wet-pit, reaches and reduces the Waste Heat Power Station floor space, reduces the purpose of power supply for station.
(3) power station needs the continuously contradiction of operation for the discontinuity that overcomes the flushing cinder process, and system uses asynchronous generator to replace the synchronous generator unit.Asynchronous generator can be realized taking over seamlessly between generator and electric motor mode in the flushing cinder intermittent time.Simultaneously, asynchronous generator replaces synchrodyne can realize Lower early investment, to reduce running maintenance expense system more simple and easy to control.
The present invention compared with prior art has following advantage: existing flushing cinder system is improved, realized the combination of slag flushing process and UTILIZATION OF VESIDUAL HEAT IN, at utmost reclaim melting slag waste heat, so that flushing cinder steeping in water for reconstitution electricity is achieved; The present invention adopts asynchronous machine to replace synchronous machine and effectively solves the intermittent disadvantageous effect of flushing cinder process, and the while decrease cost is for unmanned creates conditions; Adopt the steam expansion technology to realize flushing cinder steeping in water for reconstitution electricity, configuration flasher and negative pressure saturated vapor turbine make security of system, reliable.
Description of drawings
A kind of blast furnace slag quenching water afterheat generating system of Fig. 1;
Fig. 2 is wet type air-cooled condenser structural representation;
Fig. 3 is ambient air pressure type thermal siphon flushing cinder tower.
Embodiment
Below in conjunction with the drawings and specific embodiments content of the present invention is described in further details.
Embodiment:
See also shown in Figure 1, a kind of blast furnace slag quenching water afterheat generating system, comprise the flasher 21, negative pressure steam turbine 22, wet type air-cooled condenser 23, flushing cinder pond 25 and the flasher 21 that connect and compose successively link circuit, negative pressure steam turbine 22 is connected to asynchronous generator 24; Two pipelines are told in flushing cinder pond 25, are connected to normal atmosphere thermal siphon flushing cinder tower 30 by slag-washing-out pump 27 and feeding spraying pump 26 respectively; Normal atmosphere thermal siphon flushing cinder tower 30 exit end connect backflash steaming device 21 by pipeline, are connected with dewatering unit 35, hot tub 38, hot water pump 36 last time at this pipeline.
See also shown in Figure 3, be provided with relief door 32 in the normal atmosphere thermal siphon flushing cinder tower 30, partition apparatus by relief door 32 is divided into the hemi-closure space that space that top communicates with emptying pipeline 29 and bottom communicate with molten slag groove import 34 with the space, relief door 32 arranged beneath have shower 31, molten slag groove import 34 belows are equipped with slag case 33, the top of molten slag groove import 34 is vapour collect cover 28, and vapour collect cover 28 communicates with emptying pipeline 29; Slag case 33 processed is connected with the pipeline at slag-washing-out pump 27 places, and shower 31 is connected with the pipeline at feeding spraying pump 26 places.
Further, be provided with filtration unit 37 in the hot tub 38.
Further, wet type air-cooled condenser 23 adopts high-order the layout.
Please shown in Figure 2 in conjunction with consulting, wet type air-cooled condenser 23 comprises exhaust steam header 15, and the high efficient heat exchanging tube bank 5 with predetermined arc that links to each other with exhaust steam header 15, the other end of high efficient heat exchanging tube bank 5 is connected with condensed water header 6, below high efficient heat exchanging tube bank 5, recirculated water recooling plant 7 is arranged, V-type air inlet device 8, recirculated water catch basin 10, recirculated water catch basin 10 is connected with cooling water circulation water pump 9, cooling water circulation water pump 9 is restrained 5 tops by pipeline and high efficient heat exchanging and is connected by the shower 16 that shower drive unit 4 drives, above high efficient heat exchanging tube bank 5, be provided with water separator 3, pod 2, establish induced draft fan 1 in the pod 2, wet type air-cooled condenser 23 also comprises water ring vacuum pump 11 pumped vacuum systems with preposition pre-cooler 12, and is connected with controller 15 by signal input output end 14.
The working process of the present embodiment is as follows: in the flushing cinder process, water in the slag-washing-out pump 27 suction flushing cinder ponds 25 inputs to ambient air pressure type thermal siphon flushing cinder tower water extraction slag, the water yield changes along with the variation of the quantity of slag, water in the feeding spraying pump 26 suction flushing cinder ponds 25 is inputted the steam that shower 31 efficient recovery flushing cinder processes produce simultaneously, vapour collect cover 28 is connected the mixed gas that absorption leaks out from ambient air pressure type thermal siphon flushing cinder tower with emptying pipeline 29, the relief door 32 of ambient air pressure type thermal siphon flushing cinder top of tower will be opened when instantaneous vapour pressure is larger, mixed gas is emptying by emptying pipeline 29 in the tower, guarantees security of system; The water of drawing after the hot temperature of slag raises enters hot tub 38 through dewatering unit 35, squeezed in the flasher 21 by hot water pump 36 after the filtration unit 37 that hot water arranges in the pond purifies, flash distillation steam out enters 22 actings of negative pressure steam turbine and drives asynchronous generator 24 generatings; After exhaust steam after the acting entered the exhaust steam header 15 of wet type air-cooled condenser 23, uniformly distributing was to the high efficient heat exchanging tube bank 5 with certain radian.High efficient heat exchanging tube bank 5 adopt part also, arranged in series, realize that effectively vapor condensation separates with noncondensable gas and discharges.Cooling circulating water by recirculated water catch basin 10 through cooling water circulation water pump 9 squeeze into the controllable rotary frequency that driven by shower drive unit 4 swing with the shower 16 of non-equidistant aperture in after spill to efficient heat-exchanging tube bundle 5 surfaces and form water films.The water film decalescence makes vapor condensation in the pipe, simultaneously, outside air is introduced between heat-exchanging tube bundle by bottom V-type air inlet device 8, the air that increases through caloic exchange enthalpy enters atmosphere through water separator 3 and pod 2 by induced draft fan 1, in order to reduce circulating water temperature, added one section recirculated water subcooler 7 that is made up by filler in this device, the recirculated water after the wet exchange of heat is collected to bottom cycle water catch basin 10, recirculation; In addition, in order to guarantee that water-ring pump can still have higher suction capactity when aspirating steam and noncondensable gas mixture when motor power consumption is relatively low, this device has configured is with the water ring vacuum pump 11 that vacuumizes preposition pre-cooler 12, by the volumetric flow rate of steam in the precooling decrease mixed gas, the assurance incondensable gas is effectively got rid of; Simultaneously, device also is furnished with controller 13 and the necessary signal input output end 14 that guarantees the 23 normal operations of wet type air-cooled condenser; Water after condensed condensed water and the flash distillation all enters flushing cinder pond 25, so realizes circulation; Asynchronous generator switches to electric motor state and rotating speed is made as low speed and keeps system's operation if the flushing cinder water system is in interval of rest.Because pitch time, generally between 5～40 minutes, every day, the flushing cinder number of times was about 10 times, so can avoid so the unnecessary shutdown loss of unit or the larger wetting system that stores is set, both simplified system and cost-effective operations of energy.
Above-listed detailed description is that this embodiment limits claim of the present invention for the specifying of possible embodiments of the present invention, and the equivalence that all the present invention of disengaging do is implemented or change, all should be contained in the claim of this case.
Claims (5)
1. blast furnace slag quenching water afterheat generating system, it is characterized in that: comprise the flasher (21), negative pressure steam turbine (22), wet type air-cooled condenser (23), flushing cinder pond (25) and the flasher (21) that connect and compose successively link circuit, described negative pressure steam turbine (22) links to each other with asynchronous generator (24); Two pipelines are told in described flushing cinder pond (25), are connected to normal atmosphere thermal siphon flushing cinder tower (30) by slag-washing-out pump (27) and feeding spraying pump (26) respectively; Normal atmosphere thermal siphon flushing cinder tower (30) exit end connects backflash steaming device (21) by pipeline, is connected with dewatering unit (35), hot tub (38), hot water pump (36) in turn at this pipeline.
2. blast furnace slag quenching water afterheat generating system according to claim 1, it is characterized in that: be provided with relief door (32) in the described normal atmosphere thermal siphon flushing cinder tower (30), partition apparatus by relief door (32) is divided into the hemi-closure space that space that top communicates with emptying pipeline (29) and bottom communicate with molten slag groove import (34) with the space, relief door (32) arranged beneath has shower (31), molten slag groove import (34) below is equipped with slag case (33), the top of molten slag groove import (34) is vapour collect cover (28), and vapour collect cover (28) communicates with emptying pipeline (29); Described slag case processed (33) is connected with the pipeline at slag-washing-out pump (27) place, and described shower (31) is connected with the pipeline at described feeding spraying pump (26) place.
3. blast furnace slag quenching water afterheat generating system according to claim 1 is characterized in that: be provided with filtration unit (37) in the described hot tub (38).
4. blast furnace slag quenching water afterheat generating system according to claim 1, it is characterized in that: described wet type air-cooled condenser (23) comprises exhaust steam header (15), and the high efficient heat exchanging tube bank (5) with predetermined arc that links to each other with exhaust steam header (15), the other end of high efficient heat exchanging tube bank (5) is connected with condensed water header (6), in high efficient heat exchanging tube bank (5) below recirculated water recooling plant (7) is arranged, V-type air inlet device (8), recirculated water catch basin (10), recirculated water catch basin (10) is connected with cooling water circulation water pump (9), cooling water circulation water pump (9) is connected by the shower (16) that shower drive unit (4) drives with high efficient heat exchanging tube bank (5) top by pipeline, be provided with water separator (3) in high efficient heat exchanging tube bank (5) top, pod (2), establish induced draft fan (1) in the pod (2), wet type air-cooled condenser (23) also comprises water ring vacuum pump (11) pumped vacuum systems with preposition pre-cooler (12), and is connected with controller (15) by signal input output end (14).
5. blast furnace slag quenching water afterheat generating system according to claim 1 is characterized in that: the high-order layout of described wet type air-cooled condenser (23) employing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310006806.7A CN103060498B (en) | 2013-01-09 | 2013-01-09 | Blast furnace cinder flushing water residual heat power generation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310006806.7A CN103060498B (en) | 2013-01-09 | 2013-01-09 | Blast furnace cinder flushing water residual heat power generation system |
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| CN103060498A true CN103060498A (en) | 2013-04-24 |
| CN103060498B CN103060498B (en) | 2015-03-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344746A (en) * | 2013-08-02 | 2015-02-11 | 上海振世能源科技有限公司 | Vacuum flashing heat exchanger |
| CN106677839A (en) * | 2017-01-13 | 2017-05-17 | 沈阳绿色环保能源科技有限公司 | System and method for converting hot water into mechanical power |
| CN107460265A (en) * | 2017-08-14 | 2017-12-12 | 河钢股份有限公司邯郸分公司 | Blast furnace slag quenching water steam heat recovery Application way and system |
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| CN1152113A (en) * | 1995-12-13 | 1997-06-18 | 郑学明 | Water film air-cooled condensator |
| GB2375160A (en) * | 2001-05-05 | 2002-11-06 | Clyde Bergemann Ltd | Furnace injection apparatus |
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| CN104344746A (en) * | 2013-08-02 | 2015-02-11 | 上海振世能源科技有限公司 | Vacuum flashing heat exchanger |
| CN106677839A (en) * | 2017-01-13 | 2017-05-17 | 沈阳绿色环保能源科技有限公司 | System and method for converting hot water into mechanical power |
| CN107460265A (en) * | 2017-08-14 | 2017-12-12 | 河钢股份有限公司邯郸分公司 | Blast furnace slag quenching water steam heat recovery Application way and system |
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| CN103060498B (en) | 2015-03-11 |
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