CN103234364B - Device with griddle and process for generating power by efficiently recycling sinter waste heat - Google Patents
Device with griddle and process for generating power by efficiently recycling sinter waste heat Download PDFInfo
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Abstract
A device with a griddle and a process for generating power by recycling sinter waste heat relate to the technical field of waste heat power generation. The device comprises a sinter cooling system, a waste heat power generation system and a smoke system. The sinter cooling system and the waste heat circulation power generation system are connected through the smoke system to form a loop. The process includes 1) sinter cooling, 2) the smoke system and 3) waste heat power generation. The device and the technological process for waste heat power generation have the advantages of completely utilizing waste heat discharged in the sinter cooling process, obviously increasing power generation quantity, obviously reducing system self power utilization rate and being remarkable in energy-saving effect.
Description
Technical field
The invention belongs to cogeneration technology field, relate in particular to a kind of sintering deposit waste heat high efficiente callback generating equipment and technique with jig.
Background technology
Steel and iron industry is national economy important foundation industry, and energy-output ratio accounts for 15% of national industrial total energy consumption, is the key industry of energy-saving and emission-reduction.In steel manufacture process, the energy consumption of sintering circuit is higher, is generally the 10-12% of iron and steel enterprise's total energy consumption, is only second to iron-smelting process, and energy-saving potential is huge.In sintering circuit, the heat sinter that sintering machine is discharged must be cooled to 150 ℃ of left and right, then enters next procedure.At present, sintering deposit is that to utilize air dielectric to carry out through straight line cooler or circular cooler cooling, and sintering deposit is in cooling process, and heat energy becomes waste gas sensible heat, and EGT is between 100-400 ℃.In sintering circuit total energy consumption, there is nearly 50% heat energy with sintering device flue gas and the discharge of cooling machine waste gas sensible heat form, if be not used, a large amount of residual heat resources will slattern in vain.
Processing mode for waste gas residual heat as above mainly contains following two kinds at present:
The one, direct discharge.Sintering device flue gas and cooling machine waste gas directly enter atmosphere, and waste heat does not utilize;
The 2nd, utilize waste heat to produce steam and utilize.The waste gas of 270～450 ℃ that utilizes belt-cooling machine or central cooler I, II section to produce, arranges waste heat boiler and carries out heat exchange, produces saturated vapor or the superheated steam of low parameter, for the productive life steam of steel mill or generate electricity.
This waste heat recovery mainly contains following shortcoming:
1, heat exchange is insufficient.Distributary heat exchange between sintering deposit and cooling-air on belt-cooling machine or central cooler, heat transfer effect is poor; Sintering deposit bed of material piling height is low, and heat sinter and cooling-air heat-exchange time are short, and heat exchange is insufficient.
2, sealing is poor, leaks out serious.The quality of sealing effectiveness has directly determined performance and the generated energy of electricity generation system, is subject to belt-cooling machine or central cooler structural limitations, and belt-cooling machine or central cooler sealing are poor, leaks out serious.
3, UTILIZATION OF VESIDUAL HEAT IN efficiency is low.In existing sintering machine afterheat generating system, general I, II section that from belt-cooling machine or central cooler, temperature is higher are got wind, and sintering deposit and cooling-air heat exchange difference are large, and flue-gas temperature is low, and UTILIZATION OF VESIDUAL HEAT IN efficiency is low, and construction investment is long payoff period.
4, power consumption is high.Sintering deposit and the heat exchange of cooling-air distributary, the required cooling air quantity of Unit Weight sintering deposit is large.Because system air leakage problem is difficult to solve, also increased cooling power consumption in addition.
5, waste heat parameter fluctuation is large, affects the security and stability of cogeneration amount and afterheat generating system.Short time in sintering machine production process is shut down 30 min with interior frequent generation, thereby causes waste heat Turbo-generator Set often to be shut down, and has a strong impact on the security and stability of generated energy and afterheat generating system.
6, contaminated environment.The flue gas of the small part higher temperature of central cooler or belt-cooling machine enters two pressure waste heat boilers and utilizes, and what the flue gas after utilization had recycles, the direct discharge having, and all the other most of flue gases that do not utilize directly discharge, and cause environmental pollution.
Summary of the invention
For overcoming the problem of above-mentioned technical existence, the invention provides a kind of sintering deposit heat-recovering generating plant and technique with jig, this waste heat power generation equipment and technique have is fully utilized the waste heat discharging in sintering deposit cooling procedure, generated energy obviously improves, system obviously reduces from power consumption rate, energy-saving effect outstanding feature.
The technical solution adopted in the present invention is: a kind of sintering deposit heat-recovering generating plant with jig, comprises sintered ore cooling system, afterheat generating system and flue gas system;
Described sintered ore cooling system comprises breaker, hot jig separating device, hot ore deposit conveying device, thin ore deposit conveying device, cool furnace, cold ore deposit discharger and cold ore deposit conveying device, breaker is arranged on the hot ore deposit outlet of sintering machine, the outlet of breaker is provided with hot jig separating device, the bottom of hot jig separating device is provided with thin ore deposit conveying device, hot jig separating device outlet be connected with the entrance of hot ore deposit conveying device, the outlet of hot ore deposit conveying device is arranged on the entrance top, hot ore deposit of cool furnace, the cold ore deposit outlet of cool furnace is connected with cold ore deposit discharger and cold ore deposit conveying device in turn,
Described flue gas system comprises air blast, cool furnace, disposable dust remover, emergency diffusion valve, two pressure waste heat boilers of cogeneration, secondary filter, air-introduced machine, chimney, blower outlet is connected with cool furnace inlet flue gas pipeline, and the exhanst gas outlet of cool furnace is communicated with two pressure waste heat boilers, secondary filter, air-introduced machine and the chimney of disposable dust remover, afterheat generating system successively by pipeline; On pipeline between disposable dust remover and two pressure waste heat boiler, emergency diffusion valve is set; Between air-introduced machine outlet and blower inlet, there is connecting pipe;
Described afterheat generating system comprises two pressure waste heat boilers, filling condensing turbine, steam turbine generator, condenser, condensate pump, gland steam heater, low pressure feed water pump, main feed pump, oxygen-eliminating device, cooling tower and water circulating pump, the main-steam outlet of two pressure waste heat boilers connects filling condensing turbine main inlet throttle-stop valve, the low-pressure steam outlet of two pressure waste heat boilers connects respectively oxygen-eliminating device and filling condensing turbine filling mouth, filling condensing turbine connects steam turbine generator, and the afterbody exhaust steam outlet of filling condensing turbine connects the steam inlet of condenser, condenser and connected cooling tower and water circulating pump form the cooling circulation of exhaust steam, the condensate water outlet of condenser connects the entrance of condensate pump, the entrance of condensate water delivery side of pump and gland steam heater is connected, the outlet of gland steam heater is connected with the low-level (stack-gas) economizer water inlet of two pressure waste heat boilers through pipeline, the delivery port of low-level (stack-gas) economizer is connected with the entrance of oxygen-eliminating device, the outlet of oxygen-eliminating device connects respectively the entrance of low pressure feed water pump and main feed pump, low pressure feed water pump discharge is connected with the water inlet of the low-pressure coal saver of two pressure waste heat boilers, main feed pump outlet is connected with the middle pressure economizer water inlet of two pressure waste heat boilers through piping.
Described hot jig separating device screens out the thin sintering deposit of 0-5mm.
Described hot ore deposit conveying device adopts conveyer insulation to carry continuously hot ore deposit mode.
Described cool furnace has adopted the cooling sintering deposit of sealed furnace formula.
Described two pressure waste heat boilers are vertical, are provided with main steam device for generating electricity and for generating electricity and the low-pressure steam device of deoxygenation, main steam device is provided with high pressure drum, and low-pressure steam device is provided with low-pressure drum.
In described two pressure waste heat boilers, be provided with successively two-stage superheater, attemperator, primary superheater, middle pressure evaporimeter, low-pressure superheater, middle pressure economizer II, low pressure evaporator, middle pressure economizer I, low-pressure coal saver and low-level (stack-gas) economizer from top to bottom.
Described oxygen-eliminating device adopts atmosphere-type thermodynamic oxygen remover, the low-pressure steam that vapour source produces from two pressure waste heat boilers.
A sintering deposit exhaust heat recovery power generation technique with jig, comprises the following steps:
1) sintering deposit is cooling: the heat sinter of discharging from sintering machine enters cool furnace through breaker, hot jig separating device, hot ore deposit conveying device, discharges and transports after cooling in cool furnace through cold ore deposit discharger and cold ore deposit conveying device;
2) flue gas system: cool furnace adopts air to carry out cooling, air is after air blast pressurization, enter the cooling sintering deposit of cool furnace, cooled hot flue gas is after one-time dedusting, enter again two pressure waste heat boilers and carry out heat exchange, low-temperature flue gas after heat exchange after final dusting, enters air-introduced machine pressurization, then through smoke stack emission again; Between disposable dust remover and two pressure waste heat boiler, on pipeline, be provided with emergency diffusion valve, between air-introduced machine and air blast, be provided with connecting pipe and control valve, realize flue gas recirculation;
3) cogeneration: the main steam that two pressure waste heat boilers produce enters filling condensing turbine by main inlet throttle-stop valve, the low-pressure steam that two pressure waste heat boilers produce enters filling condensing turbine through filling valve, two bursts of common pushing turbine actings of steam, steam turbine drags steam turbine generator generating, the exhaust steam of filling condensing turbine afterbody in condenser through cooling tower, after circulation that water circulating pump forms is cooling, become condensed water, condensed water is again through condensate pump, after gland steam heater heating, enter the low-level (stack-gas) economizer of two pressure waste heat boilers, after heating, enter oxygen-eliminating device, remove after water oxygen gas, part water enters middle pressure economizer I through main feed pump pressurization, after being heated into saturated hot-water, enter middle pressure drum, the saturation water of this drum is through becoming saturated vapor after heating in circulating in middle pressure evaporimeter, saturated vapor passes through primary superheater successively, attemperator, two-stage superheater becomes main steam, main steam enters steam turbine main inlet throttle-stop valve by the road, form a main steam cogeneration closed circuit, another part water enters two pressure waste heat boiler low-pressure coal savers through the pressurization of low pressure feed water pump, after heating, enter low-pressure drum, the saturation water of this drum is becoming saturated vapor after heating through Natural Circulation in low pressure evaporator, saturated vapor becomes low-pressure superheated steam through low temperature superheater again, then be divided into two parts, a part enters oxygen-eliminating device heated feed water and carries out deoxygenation, and another part enters filling condensing turbine acting generating.
Beneficial effect of the present invention:
1, improve sintering deposit quality, improve finished product ore deposit amount.Heat sinter is long cool time, and heat exchange is more abundant; Heat transfer temperature difference is balanced, avoids heat sinter cracked because of chilling, improves sinter strength, reduces quantity of return mines, improves finished product ore deposit amount.
2, improve flue-gas temperature, improve steam parameter, residual heat generating efficiency improves.Sintering deposit, through conveyer insulation conveying continuously, improves cool furnace and enters ore deposit temperature, sintering deposit and cooling-air countercurrent flow, heat exchange is abundant, and flue-gas temperature improves, the corresponding raising of cogeneration steam parameter, can adopt medium temperature and medium pressure steam parameter, improve generating efficiency, generated energy is larger.
3, reduce cooling system power consumption.Adopt the cooling required cooling air quantity of stove formula little, solved Air Leakage completely, so the personal large reduction of TV university of cooling system.
4, improve afterheat generating system adaptability and security.Cool furnace is designed with heat sinter and stores section, avoids shutting down because sintering machine temporary stoppage causes waste heat parameter fluctuation and Turbo-generator Set, has improved afterheat generating system adaptability and security.
5, improve the heat exchange efficiency of sintering deposit and cooling air, guarantee the cooling effect of sintering deposit.Sintering deposit first through overheated jig, screens out the following sintering deposit of 5mm before entering cool furnace, guarantees the porosity of sintering deposit in cool furnace, reduces flowing resistance, guarantees sintering deposit cooling effect.
6, reduce the pollutant emissions such as flue dust, improve environmental quality.Whole system can realize zero leakage substantially, and therefore gas flue dust can significantly reduce pollutant emission by discharging after cleaner dedusting, improves working environment.
7, designing and arranging do-nothing system, reduces the impact cooling on sintering deposit of waste heat Turbo-generator Sets Faults.Due at two pressure waste heat boilers, import and export on exhaust pipings and one-time dedusting outlet exhaust piping on be all provided with valve, after afterheat generating system generation emergency off-the-line, cool furnace system can continuous and steady operation, guarantees the normally cooling of sintering deposit.
8, cooling air temperature is easy to adjust, guarantees sintering deposit cooling effect.Between air-introduced machine and air blast, be provided with connecting pipe, by regulating air-introduced machine to the air quantity of air blast, the temperature of adjustable cooling air, guarantees cold ore deposit temperature.
9, adopt filling condensing-type steamer Turbo-generator Set, can carry out parameter optimization according to flue-gas temperature, rationally determine two pressure waste heat boiler steam parameters and turbine steam condition, thereby select the steamer Turbo-generator Set of parameter matching, improve system effectiveness.
10, boiler feedwater adopts thermal de-aeration, and after deoxygenation, the water of approximately 104 ℃ is directly supplied with two pressure waste heat boilers, has both guaranteed that the exhaust gas temperature of two pressure waste heat boilers, 120 ℃ of left and right, had guaranteed again the oxygen index of boiler feedwater.
11, control system has adopted DCS Distributed Control System, guarantees the safe and stable operation of system.
12, owing to taking above-mentioned multinomial technology, utilize a large amount of waste heats that discharge in sintering deposit cooling procedure to generate electricity, improved UTILIZATION OF VESIDUAL HEAT IN efficiency, energy-saving effect is remarkable.
13, utilize sintering deposit cogeneration, reduced the production cost of thermal pollution and enterprise, with 265M
2sintering machine auxiliary construction cogeneration project is example, is equivalent to more than 30,000 tons of standard coals of every young burning, discharges the gases such as more than 100,000 tons of carbon dioxide less in atmosphere, is beneficial to environmental protection, has improved efficiency of energy utilization simultaneously, thereby has improved the competitiveness of enterprise;
14, this device for generating power by waste heat all adopts home equipment, and equipment investment is low, has good promotional value and good market prospects.
Accompanying drawing explanation
Fig. 1 is equipment schematic diagram of the present invention;
Fig. 2 is the partial enlarged drawing of of the present invention pair of pressure waste heat boiler.
In figure, be labeled as: 1, sintering machine, 2, breaker, 3, hot jig separating device, 4, hot ore deposit conveying device, 5, thin ore deposit conveying device, 6, cool furnace, 7, disposable dust remover, 8, emergency diffusion valve, 9, two pressure waste heat boilers, 10, filling condensing turbine, 11, steamer steam turbine generator, 12, cooling tower, 13, water circulating pump, 4, condenser, 15, condensate pump, 16, gland steam heater, 17, low pressure feed water pump, 18, main feed pump, 19, oxygen-eliminating device, 20, secondary filter, 21, air-introduced machine, 22, chimney, 23, air blast, 24, cold ore deposit discharger, 25, cold ore deposit conveying device, 26, middle pressure drum, 27, low-pressure drum.
The specific embodiment
Below in conjunction with accompanying drawing explanation and the specific embodiment, the present invention is further described.As shown in the figure, a kind of sintering deposit heat-recovering generating plant and technique with jig, comprise sintered ore cooling system, afterheat generating system and flue gas system, and sintered ore cooling system and afterheat generating system connect and compose loop by flue gas system;
Described sintered ore cooling system comprises breaker 2, hot jig separating device 3, hot ore deposit conveying device 4, thin ore deposit conveying device 5, cool furnace 6, cold ore deposit discharger 24 and cold ore deposit conveying device 25, breaker 2 is arranged at the hot ore deposit outlet of sintering machine 1, the outlet of breaker 2 is connected with hot jig separating device 3 entrances, the thin ore deposit outlet of hot jig separating device 3 is connected with thin ore deposit conveying device 5 entrances, hot jig separating device 3 outlets are connected with the entrance of hot ore deposit conveying device 4, the outlet of hot ore deposit conveying device 4 is arranged on the entrance top, hot ore deposit of cool furnace 6, the cold ore deposit outlet of cool furnace 6 is connected with cold ore deposit discharger 24 and cold ore deposit conveying device 25 in turn,
Described flue gas system comprises air blast 23, cool furnace 6, disposable dust remover 7, two pressure waste heat boilers 9 of afterheat generating system, emergency diffusion valve 8, two pressure waste heat boilers 9, secondary filter 20, air-introduced machine 21 and chimney 22, air blast 23 air outlets are communicated with the bottom smoke inlet of cool furnace 6, the exhanst gas outlet of cool furnace 6 is communicated with disposable dust remover 7 successively by pipeline, two pressure waste heat boilers 9 of afterheat generating system, secondary filter 20, air-introduced machine 21 and chimney 22, on pipeline between disposable dust remover 7 and two pressure waste heat boiler 9, emergency diffusion valve 8 is set, between air-introduced machine 21 outlets and air blast 23 entrances, connecting pipe is set,
Described afterheat generating system comprises two pressure waste heat boilers 9, filling condensing turbine 10, steam turbine generator 11, cooling tower 12, water circulating pump 13, condenser 14, condensate pump 15, gland steam heater 16, low pressure feed water pump 17, main feed pump 18 and oxygen-eliminating device 19, the main-steam outlet of two pressure waste heat boilers 9 connects filling condensing turbine 10, filling condensing turbine 10 connects steam turbine generator 11, the afterbody exhaust steam outlet of filling condensing turbine 10 connects the steam inlet of condenser 14, condenser 14 and connected cooling tower 12 and water circulating pump 13 form the cooling circulating water system of exhaust steam, the condensate water outlet of condenser 14 connects condensate pump 15 entrances, the outlet of condensate pump 15 is connected with the entrance of gland steam heater 16, the outlet of gland steam heater 16 is connected with the low-level (stack-gas) economizer water inlet of two pressure waste heat boilers 9 through pipeline, the delivery port of low-level (stack-gas) economizer is connected with the entrance of oxygen-eliminating device 19, the outlet of oxygen-eliminating device 19 is connected with respectively low pressure feed water pump 17 and main feed pump 18, 17 outlets of low pressure feed water pump are connected with the water inlet of the low-pressure coal saver of two pressure waste heat boilers 9, main feed pump 18 outlets are connected with the middle pressure economizer water inlet of two pressure waste heat boilers 9 through piping.
Described hot ore deposit conveying device 4 adopts the continuous mode of movement of the hot insulation of conveyer to carry.
Described hot jig separating device 3 screens out the thin sintering deposit of 0-5mm.
Described two pressure waste heat boilers 9 are for two pressure waste heat boilers and be vertical, are provided with main steam device for generating electricity and the low-pressure steam device of deoxygenation and generating, and main steam device is provided with middle pressure drum 26, and low-pressure steam device is provided with low-pressure drum 27.
In described two pressure waste heat boilers 9, be provided with two-stage superheater, attemperator, primary superheater, middle pressure evaporimeter, low-pressure superheater, middle pressure economizer II, low pressure evaporator, middle pressure economizer I, low-pressure coal saver and low-level (stack-gas) economizer.
Described oxygen-eliminating device 19 adopts atmosphere-type thermodynamic oxygen remover, the low-pressure steam that vapour source produces from two pressure waste heat boilers.
On cool furnace 6 outlet exhaust pipings, be provided with emergency diffusion valve 8, two pressure waste heat boilers 9 are imported and exported on exhaust piping and are provided with by-pass valve control.Even if two pressure waste heat boilers or electricity generation system break down, sintering deposit still can be normally cooling.
Between air blast 23 and air-introduced machine 21, be provided with connecting pipe.By connecting pipe flue gas, can partly or entirely enter cool furnace, realize the adjusting of cooling air temperature, guarantee the cooling effect of sintering deposit.
A sintering deposit exhaust heat recovery power generation technique with jig, comprises the following steps:
1) sintering deposit is cooling: from the sintering deposit of 700 ℃ of left and right of the discharge of sintering machine 1 through breaker 2, hot jig separating device 3, hot ore deposit conveying device 4, enter cool furnace 6, in cool furnace after flue gas is cooling, the cold sinter of 150 ℃ of left and right is discharged and is transported through cold ore deposit discharger 24 and cold ore deposit conveying device 25;
2) flue gas system: cool furnace 6 adopts flue gas to carry out cooling, flue gas is after air blast 23 pressurizations, enter the cooling sintering deposit of cool furnace 6, cooled flue gas, after disposable dust remover 7, then enters two pressure waste heat boilers 9 and carries out heat exchange, and the low-temperature flue gas of 120 ℃ of left and right after heat exchange is again after secondary filter 20, enter air-introduced machine 21 pressurizations, then through chimney 22 discharges, between air-introduced machine 21 and air blast 23, be provided with connecting pipe, air blast 23 entrance flue gas temperatures are regulated;
3) cogeneration: the main steam producing after two pressure waste heat boiler 9 heat exchange enters filling condensing turbine 10 main inlet throttle-stop valves by stop valve, the low-pressure steam that two pressure waste heat boilers 9 produce enters filling condensing turbine 10 filling valves through filling valve, main steam and low-pressure steam promote 10 actings of filling condensing turbine jointly, filling condensing turbine 10 drags steam turbine generator 11 generatings, the 10 afterbody exhaust steam of filling condensing turbine are interior through cooling tower 12 at condenser 14, after circulation that water circulating pump 13 forms is cooling, become condensed water, condensed water is again through condensate pump 15, after gland steam heater 16 heating, enter two pressure waste heat boiler 9 low-level (stack-gas) economizers, after heating, enter oxygen-eliminating device 19, remove after water oxygen gas, part water enters middle pressure economizer through main feed pump 18 pressurizations, after being heated into saturated hot-water, enter middle pressure drum 26, the saturated hot-water of this drum is through becoming saturated vapor after heating in circulating in evaporimeter, saturated vapor passes through primary superheater successively, attemperator, two-stage superheater becomes main steam, main steam enters filling condensing turbine 10 main inlet throttle-stop valves by the road, form a main steam generating closed circuit, another part water enters two pressure waste heat boiler 9 low-pressure coal savers through 17 pressurizations of low pressure feed water pump, after being heated into saturated hot-water, enter low-pressure drum 27, the saturation water of this drum is becoming saturated vapor after heating through Natural Circulation in evaporimeter, saturated vapor becomes low-pressure steam through low-pressure superheater again, then be divided into two parts, a part enters oxygen-eliminating device 19 heated feed waters and carries out deoxygenation, and a part enters the 10 acting generatings of filling condensing turbine.
Claims (8)
1. with a sintering deposit heat-recovering generating plant for jig, it is characterized in that: comprise sintered ore cooling system, afterheat generating system and flue gas system;
Described sintered ore cooling system comprises breaker (2), hot jig separating device (3), hot ore deposit conveying device (4), thin ore deposit conveying device (5), cool furnace (6), cold ore deposit discharger (24) and cold ore deposit conveying device (25), breaker (2) is arranged on the hot ore deposit outlet of sintering machine, the outlet of breaker (2) is provided with hot jig separating device (3), the bottom of hot jig separating device (3) is provided with thin ore deposit conveying device (5), hot jig separating device (3) outlet be connected with the entrance of hot ore deposit conveying device (4), the outlet of hot ore deposit conveying device (4) is arranged on the entrance top, hot ore deposit of cool furnace (6), the cold ore deposit outlet of cool furnace (6) is connected with cold ore deposit discharger (24) and cold ore deposit conveying device (25) in turn,
Described flue gas system comprises two pressure waste heat boilers (9), secondary filter (20), air-introduced machine (21), the chimney (22) of air blast (23), cool furnace (6), disposable dust remover (7), emergency diffusion valve (8), cogeneration, air blast (23) air outlet is connected with cool furnace (6) inlet flue gas pipeline, and the exhanst gas outlet of cool furnace (6) is communicated with disposable dust remover (7), two pressure waste heat boiler (9), secondary filter (20), air-introduced machine (21) and chimney (22) successively by pipeline; On pipeline between disposable dust remover (7) and two pressure waste heat boiler (9), emergency diffusion valve (8) is set; Between air-introduced machine (21) outlet and air blast (23) entrance, there is connecting pipe;
Described afterheat generating system comprises two pressure waste heat boilers (9), filling condensing turbine (10), steam turbine generator (11), condenser (14), condensate pump (15), gland steam heater (16), low pressure feed water pump (17), main feed pump (18), oxygen-eliminating device (19), cooling tower (12) and water circulating pump (13), the main-steam outlet of two pressure waste heat boilers (9) connects filling condensing turbine (10) main inlet throttle-stop valve, the low-pressure steam outlet of two pressure waste heat boilers (9) connects respectively oxygen-eliminating device (19) and filling condensing turbine (10) filling mouth, filling condensing turbine (10) connects steam turbine generator (11), the afterbody exhaust steam outlet of filling condensing turbine (10) connects the steam inlet of condenser (14), condenser (14) and connected cooling tower (12) and water circulating pump (13) form the cooling circulation of exhaust steam, the condensate water outlet of condenser (14) connects the entrance of condensate pump (15), the outlet of condensate pump (15) is connected with the entrance of gland steam heater (16), the outlet of gland steam heater (16) is connected with the low-level (stack-gas) economizer water inlet of two pressure waste heat boilers (9) through pipeline, the delivery port of low-level (stack-gas) economizer is connected with the entrance of oxygen-eliminating device (19), the outlet of oxygen-eliminating device (19) connects respectively the entrance of low pressure feed water pump (17) and main feed pump (18), low pressure feed water pump (17) outlet is connected with the water inlet of the low-pressure coal saver of two pressure waste heat boilers (9), main feed pump (18) outlet is connected with the middle pressure economizer water inlet of two pressure waste heat boilers (9) through piping.
2. a kind of sintering deposit heat-recovering generating plant with jig according to claim 1, is characterized in that: described hot jig separating device (3) screens out the thin sintering deposit of 0-5mm.
3. a kind of sintering deposit heat-recovering generating plant with jig according to claim 1, is characterized in that: described hot ore deposit conveying device (4) adopts conveyer insulation to carry continuously hot ore deposit mode.
4. a kind of sintering deposit heat-recovering generating plant with jig according to claim 1, is characterized in that: described cool furnace (6) has adopted the cooling sintering deposit of sealed furnace formula.
5. a kind of sintering deposit heat-recovering generating plant with jig according to claim 1, it is characterized in that: described two pressure waste heat boilers (9) are vertical, be provided with main steam device for generating electricity and for generating electricity and the low-pressure steam device of deoxygenation, main steam device is provided with high pressure drum, and low-pressure steam device is provided with low-pressure drum.
6. a kind of sintering deposit heat-recovering generating plant with jig according to claim 1, is characterized in that: in described two pressure waste heat boilers (9), be provided with successively two-stage superheater, attemperator, primary superheater, middle pressure evaporimeter, low-pressure superheater, middle pressure economizer II, low pressure evaporator, middle pressure economizer I, low-pressure coal saver and low-level (stack-gas) economizer from top to bottom.
7. a kind of sintering deposit heat-recovering generating plant with jig according to claim 1, is characterized in that: described oxygen-eliminating device (19) adopts atmosphere-type thermodynamic oxygen remover (19) low-pressure steam that vapour source produces from two pressure waste heat boilers (9).
8. the electrification technique as well as of a kind of sintering deposit heat-recovering generating plant with jig according to claim 1, is characterized in that: comprise the following steps:
1) sintering deposit is cooling: the heat sinter of discharging from sintering machine enters cool furnace (6) through breaker (2), hot jig separating device (3), hot ore deposit conveying device (4), transports after cooling cool furnace (6) in through cold ore deposit discharger (24) and cold ore deposit conveying device (25) discharge;
2) flue gas system: cool furnace (6) adopts air to carry out cooling, air is after air blast (23) pressurization, enter the cooling sintering deposit of cool furnace (6), cooled hot flue gas is after one-time dedusting, enter again two pressure waste heat boilers (9) and carry out heat exchange, low-temperature flue gas after heat exchange after final dusting, enters air-introduced machine (21) pressurization again, then through chimney (22), discharges; Between disposable dust remover (7) and two pressure waste heat boiler (9), on pipeline, be provided with emergency diffusion valve (8), between air-introduced machine (21) and air blast (23), be provided with connecting pipe and control valve, realize flue gas recirculation;
3) cogeneration: the main steam that two pressure waste heat boilers (9) produce enters filling condensing turbine (10) by main inlet throttle-stop valve, the low-pressure steam that two pressure waste heat boilers (9) produce enters filling condensing turbine (10) through filling valve, two bursts of common pushing turbine actings of steam, steam turbine drags steam turbine generator (11) generating, filling condensing turbine (10) afterbody exhaust steam in condenser (14) through cooling tower (12), after circulation that water circulating pump (13) forms is cooling, become condensed water, condensed water is again through condensate pump (15), after gland steam heater (16) heating, enter the low-level (stack-gas) economizer of two pressure waste heat boilers (9), after heating, enter oxygen-eliminating device (19), remove after water oxygen gas, part water enters middle pressure economizer I through main feed pump (18) pressurization, after being heated into saturated hot-water, enter middle pressure drum, the saturation water of this drum is through becoming saturated vapor after heating in circulating in middle pressure evaporimeter, saturated vapor passes through primary superheater successively, attemperator, two-stage superheater becomes main steam, main steam enters steam turbine main inlet throttle-stop valve by the road, form a main steam cogeneration closed circuit, another part water enters two pressure waste heat boiler (9) low-pressure coal savers through low pressure feed water pump (17) pressurization, after heating, enter low-pressure drum, the saturation water of this drum is becoming saturated vapor after heating through Natural Circulation in low pressure evaporator, saturated vapor becomes low-pressure superheated steam through low temperature superheater again, then be divided into two parts, a part enters oxygen-eliminating device (19) heated feed water and carries out deoxygenation, and another part enters filling condensing turbine (10) acting generating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310127764.2A CN103234364B (en) | 2013-04-15 | 2013-04-15 | Device with griddle and process for generating power by efficiently recycling sinter waste heat |
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| CN103471409B (en) * | 2013-09-15 | 2015-06-10 | 宁夏天纵泓光余热发电技术有限公司 | Dual-pressure vertical submerged arc furnace waste heat boiler with membrane wall heat transfer components |
| CN104457297B (en) * | 2014-11-26 | 2016-07-06 | 上海宝钢节能环保技术有限公司 | A kind of sintering waste heat recovery method and system |
| CN104501609B (en) * | 2014-12-30 | 2016-08-24 | 钢铁研究总院 | The bootstrap system of a kind of solid thermal material and Application way thereof |
| CN109163569B (en) * | 2017-06-29 | 2023-11-14 | 中冶长天国际工程有限责任公司 | Division vertical type sinter cooler and sinter cooling method |
| CN108007219A (en) * | 2017-11-23 | 2018-05-08 | 中材节能股份有限公司 | A kind of hot ore deposit cooling and residual neat recovering system |
| CN110160036B (en) * | 2019-06-03 | 2021-01-29 | 浙江麦知网络科技有限公司 | Special metallurgical refining slag equipment for steel ladle |
| CN112577313A (en) * | 2019-09-30 | 2021-03-30 | 上海梅山钢铁股份有限公司 | Vertical sinter ore cooling device with heat gradient recovery and waste gas full circulation |
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| CN2151429Y (en) * | 1992-12-23 | 1993-12-29 | 南京化工学院 | Energy saver for production of steam by waste heat from fritting furnace |
| JP2002089994A (en) * | 2000-09-19 | 2002-03-27 | Kawasaki Thermal Engineering Co Ltd | Absorption type water cooling and heating device utilizing waste heat |
| CN101344359B (en) * | 2008-08-20 | 2011-04-20 | 首钢总公司 | Sintered ring cold exhaust heat stepped recovery power generation system and technique |
| CN101482374A (en) * | 2009-02-20 | 2009-07-15 | 盐城市锅炉制造有限公司 | Power generation flue gas apparatus by using low-temperature vent gas waste heat of sintering cooler |
| CN101576351A (en) * | 2009-06-23 | 2009-11-11 | 河北理工大学 | Vertical sinter ore cooling machine capable of efficiently recycling sensible heat of sinter ores |
| CN101672578A (en) * | 2009-10-30 | 2010-03-17 | 中冶长天国际工程有限责任公司 | Power generation system using waste heat of sintering circular cooler |
| CN201852474U (en) * | 2010-10-29 | 2011-06-01 | 南京凯盛开能环保能源有限公司 | Combined recovery and power generation system for waste heat in flue gas of sintering machine and waste gas of cooling machine |
| CN102012167B (en) * | 2010-10-29 | 2012-11-28 | 南京凯盛开能环保能源有限公司 | System and method for power generating by jointly recovering waste heat of flue gas of sintering machine and exhaust gas of cooling machine |
| CN203259026U (en) * | 2013-04-15 | 2013-10-30 | 中信重工机械股份有限公司 | Efficient sintering ore waste heat recovery and electricity generation device with griddle |
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Inventor after: Peng Yan Inventor after: Li Sen Inventor after: Wei Xiaolin Inventor after: Wang Jisheng Inventor after: Tong Weifeng Inventor after: Wang Xinjian Inventor after: Shi Xiaobao Inventor after: Liu Huailiang Inventor after: Zhang Hong Inventor after: Li Teng Inventor before: Peng Yan Inventor before: Wang Jisheng Inventor before: Tong Weifeng Inventor before: Wang Xinjian Inventor before: Shi Xiaobao Inventor before: Liu Huailiang Inventor before: Zhang Hong |
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