CN105973017A - Ring cooling machine exhaust gas waste heat comprehensive utilization system - Google Patents

Ring cooling machine exhaust gas waste heat comprehensive utilization system Download PDF

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Publication number
CN105973017A
CN105973017A CN201610515445.2A CN201610515445A CN105973017A CN 105973017 A CN105973017 A CN 105973017A CN 201610515445 A CN201610515445 A CN 201610515445A CN 105973017 A CN105973017 A CN 105973017A
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China
Prior art keywords
pressure
low
utilization
waste heat
central cooler
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CN201610515445.2A
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Chinese (zh)
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CN105973017B (en
Inventor
江文豪
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中冶华天工程技术有限公司
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/001Extraction of waste gases, collection of fumes and hoods used therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/08Adaptations for driving, or combinations with, pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10Adaptations for driving, or combinations with, electric generators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K11/00Plants characterised by the engines being structurally combined with boilers or condensers
    • F01K11/02Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02Cooling
    • F27D15/0286Cooling in a vertical, e.g. annular, shaft
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004Systems for reclaiming waste heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004Systems for reclaiming waste heat
    • F27D2017/006Systems for reclaiming waste heat using a boiler
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The invention discloses a ring cooling machine exhaust gas waste heat comprehensive utilization system. The ring cooling machine exhaust gas waste heat comprehensive utilization system comprises a flue gas recirculation system; the flue gas recirculation system comprises a smoke collecting cover, a high temperature chimney and a waste heat boiler; a smoke inlet of the waste heat boiler is communicated with the high temperature chimney, and a smoke outlet of the waste heat boiler is communicated with an air return pipe; a waste heat boiler flue is sequentially provided with a high pressure section superheater, a high pressure section evaporator, a lower pressure section superheater, a high pressure section economizer, a lower pressure section evaporator, a low pressure section economizer and a condensation water heater; a high pressure section boiler barrel and a lower pressure section boiler barrel are arranged outside the waste heat boiler flue; a water inlet of the low pressure section economizer is communicated with a water outlet of a waste heat using unit, and a steam outlet of the lower pressure section superheater and a steam outlet of the high pressure section superheater are communicated with a steam inlet of the waste heat using unit; and a water inlet of the condensation water heater is communicated with a water inlet of a lower pressure heater of a generator set thermodynamic system, and a water outlet of the condensation water heater is communicated with a water outlet of the lower pressure heater of the thermodynamic system. By means of the ring cooling machine exhaust gas waste heat comprehensive utilization system, the ring cooling machine waste heat comprehensive utilization efficiency can be improved.

Description

Central cooler waste gas residual heat utilization system
Technical field
The present invention relates to the field of energy-saving technology of steel industry, particularly relate to a kind of central cooler waste gas residual heat comprehensive Utilize system.
Background technology
In each operation that iron and steel produces, sintering circuit is big power consumer, and its energy consumption is only second to Iron-smelting. Sintering circular-cooler is the postprocessing device of sintering process, for the temperature of sintering deposit is cooled to 150 DEG C it Under.The high-temp waste gas of central cooler is valuable residual heat resources, with the ring of conventional 198m2 sintering machine configuration As a example by cold, the only flow the most up to 200,000 of one section of high-temp waste gas of central cooler (temperature is about 350~450 DEG C) Nm3/h, if the waste gas residual heat of central cooler can be made full use of, will can gather in the crops considerable economic benefit.
Currently for the Land use systems mainly employing of central cooler waste gas residual heat take wind pipeline, waste heat boiler, Circulating fan, central cooler return air duct form the form of closed circuit, i.e. by taking wind pipeline by central cooler High-temp waste gas is delivered to waste heat boiler and is carried out heat exchange, and the low-temperature flue gas that waste heat boiler is discharged enters circulating fan, quilt Central cooler is returned to through central cooler return air duct after circulating fan pressurization.The program can produce considerable economy Benefit, and owing to waste gas achieves closed cycle, effectively prevent the granular material discharged ring caused in waste gas Environment pollution problem, therefore it has become the central cooler waste heat recovery mode of main flow, but the program is still So there is bigger deficiency: first, heat boiler outlet cigarette temperature is still up to about 150 DEG C, higher return air The operation of central cooler can be adversely affected by temperature: the central cooler cooling higher operation causing central cooler of pathogenic wind-warm Ecological deterioration, causes static and dynamic sealing to be easily damaged, and accelerates central cooler frame deformation, and central cooler couples position weldering Seam problems of crack;Secondly as the cooling air quantity of central cooler is very big, heat boiler outlet about 150 DEG C Waste gas contain huge sensible heat resource, this sensible heat resource still has the biggest use value, if The most directly it is back to central cooler, although central cooler high temperature section flue-gas temperature can be improved thus in certain journey Improve waste heat boiler on degree to exert oneself, but yet suffer from bigger energy waste.
Summary of the invention
For the problems referred to above, the present invention provides a kind of central cooler that can fully reclaim central cooler waste gas residual heat to give up Gas waste heat comprehensive utilization system.
For reaching above-mentioned purpose, central cooler waste gas residual heat utilization system of the present invention, including flue gas recirculation system System;Described smoke circulating system includes being arranged on the exhaust fume collecting hood above central cooler routine waste heat recovery section, setting High temperature stacks on exhaust fume collecting hood and the waste heat boiler for recovery waste heat;The smoke inlet of described waste heat boiler Connect with described high temperature stacks and conventional waste heat recovery section respectively with exhanst gas outlet;
In the flue of described waste heat boiler, the flow direction along flue gas is disposed with high pressure section superheater, high pressure Section vaporizer, low pressure stage superheater, high pressure section economizer, low pressure stage vaporizer, low pressure stage economizer and solidifying Bearing water heater, the flue of described waste heat boiler is outside equipped with high pressure section drum and low pressure stage drum;
The outlet of described low pressure stage economizer connects with the water inlet of described low pressure stage drum, described low pressure stage The water inlet of vaporizer connects with the low pressure stage outlet of described low pressure stage drum, described low pressure stage vaporizer Venthole connects with the air intake of described low pressure stage drum, and the air intake of described low pressure stage superheater is low with described The venthole connection of pressure section drum;
The high pressure section outlet of described low pressure stage drum connects with the water inlet of high pressure section feed pump, described high pressure The section outlet of feed pump connects with the water inlet of described high pressure section economizer, going out of described high pressure section economizer The mouth of a river connects with the water inlet of described high pressure section drum, the water inlet of described high pressure section vaporizer and described high pressure The outlet connection of section drum, the venthole of described high pressure section vaporizer and the air intake of described high pressure section drum Connection, the air intake of described high pressure section superheater connects with the venthole of described high pressure section drum;
The water inlet of described low pressure stage economizer connects with the outlet of described UTILIZATION OF VESIDUAL HEAT IN unit, described low pressure The venthole of the section venthole of superheater and described high pressure section superheater and the air intake of described UTILIZATION OF VESIDUAL HEAT IN unit Connection;
Described condensation water heater is in parallel even along condensing Water flow-path with the low-pressure heater of generating set therrmodynamic system Connect.
Further, the therrmodynamic system of described UTILIZATION OF VESIDUAL HEAT IN unit includes the UTILIZATION OF VESIDUAL HEAT IN unit vapour being sequentially communicated Turbine, UTILIZATION OF VESIDUAL HEAT IN unit condenser and UTILIZATION OF VESIDUAL HEAT IN unit gland heater;Described waste heat power generator turbine For steam compensating turbine;For connecting UTILIZATION OF VESIDUAL HEAT IN unit condenser and UTILIZATION OF VESIDUAL HEAT IN unit gland heater UTILIZATION OF VESIDUAL HEAT IN unit condensate pump it is provided with on pipeline.
The water inlet of described low pressure stage economizer connects with described UTILIZATION OF VESIDUAL HEAT IN unit gland heater outlet, The venthole of described high pressure section superheater connects with the main steam inlet of described steam compensating turbine, described low pressure The section venthole of superheater connects with the supplementary steam inlet of described steam compensating turbine.
Further, the therrmodynamic system of described generating set includes the generating set steam turbine being sequentially communicated, sends out Group of motors condenser, generating set gland heater and generating set low-pressure heater;Described generating set vapour The output shaft of turbine is connected with electromotor;For connecting Generation Unit Condenser and generating set gland heater Pipeline on be provided with generating set condensate pump;
The water inlet of described condensation water heater connects with the water inlet pipe of described generating set low-pressure heater, The outlet of described condensation water heater connects with the outlet conduit of described generating set low-pressure heater.
Further, the smoke inlet of described waste heat boiler takes wind pipeline with described high temperature stacks even by routine Logical, described routine takes on wind pipeline the direction along flow of flue gas and is disposed with the first cleaner unit, first-class Gauge and afterburning stove.
Further, central cooler low-temperature zone is provided with gas skirt, described gas skirt is provided with low temperature chimney; Described low temperature chimney takes wind pipeline by low temperature and connects with the air intake of described afterburning stove, described afterburning stove Gas entry connects with gas piping;Described low temperature takes and on wind pipeline, flow of flue gas direction is provided with second and removes Dirt device and second gauge.
Further, the entery and delivery port of described generating set low-pressure heater and described condensation water heater Entery and delivery port is provided with control valve.
Further, described routine takes wind pipeline arrival end and is provided with the first cigarette air valve;Described high temperature stacks Outlet is provided with the second cigarette air valve.
Further, the smoke inlet pipeline of described waste heat boiler is provided with the 3rd effusion meter.
Further, the exhanst gas outlet of described waste heat boiler is by the air inlet phase of discharge duct with circulating fan Even, the air outlet of described circulating fan is by central cooler return air duct and described central cooler routine waste heat recovery section It is connected, described central cooler return air duct is provided with diffusing chimney and the 3rd cigarette air valve, described diffusing chimney On be provided with the 4th cigarette air valve.
Further, the outlet of described low temperature chimney is provided with the 5th cigarette air valve, and described low temperature takes wind pipeline Entrance be provided with the 6th cigarette air valve.
Further, described low pressure stage drum is worn for the deoxygenation head for the feedwater deaeration in boiler.
Central cooler waste gas residual heat utilization system of the present invention carries out comprehensive utilization to the waste gas residual heat of sintering circular-cooler With, by the optimal design-aside of waste heat boiler internal exchanger, waste gas residual heat is carried out Appropriate application, at waste heat Boiler internal along flue gas flow be sequentially arranged high pressure section superheater, high pressure section vaporizer, low pressure stage superheater, High pressure section economizer, low pressure stage vaporizer, low pressure stage economizer and condensation water heater, wherein high pressure section mistake The steam that hot device and low pressure stage superheater produce enters UTILIZATION OF VESIDUAL HEAT IN unit steamer respectively as main steam and filling Machine, the acting of red switch steam turbine, this steam turbine is either used for driving electromotor still for Driving Fan Produce considerable economic benefit;Condensation water heater is used for heating in power station generator group thermodynamic system of steam tur Condensation water, the regenerative steam amount of low-pressure heater can be reduced, and the regenerative steam saved can be steam turbine Middle continuation is done work, and increases the generated energy of generating set.
Central cooler waste gas residual heat utilization system of the present invention is designed by the optimization of waste heat boiler internal exchanger Achieving the step Appropriate application of heat energy from waste gas, waste heat boiler uses double laminated structure, high pressure section Absorption of Medium phase The waste-gas heat of high temperature is produced the most high-grade steam, the waste gas heat of low pressure stage Absorption of Medium relative low temperature Amount produces the most low-grade steam, and this set can fully absorb waste-gas heat, improves waste heat boiler to useless The effective rate of utilization of gas heat energy;One-level condensation water heater is set at waste heat boiler afterbody, is generated electricity by power station The low-temperature condensate (about 30 DEG C) of unit absorbs waste gas residual heat further, reduces EGT further, Improve the thermal efficiency of waste heat boiler.
The central cooler waste gas residual heat utilization system of the present invention rational deployment by waste heat boiler internal exchanger Reduce the return air temperature of central cooler, improve the working environment of the circulating fan in cigarette distinguished and admirable journey downstream, extend The service life of circulating fan;Additionally, due to temperature reduce, the import flue gas volume of circulating fan also with Reduction, and then the energy-saving run of beneficially circulating fan.
The central cooler waste gas residual heat utilization system of the present invention rational deployment by waste heat boiler internal exchanger Reduce the return air temperature of central cooler, the method being directly back to central cooler with traditional heat boiler outlet flue gas Compare the cooling effect improving central cooler high temperature section so that the operating condition of central cooler is more nearly design work Condition, reduces owing to arranging of air return system exports the temperature controlled adverse effect of sintering deposit to central cooler, more Ensure well the quality of sintering deposit.
The central cooler waste gas residual heat utilization system of the present invention rational deployment by waste heat boiler internal exchanger Reducing the return air temperature of central cooler, improve the working environment of central cooler, the fault that can reduce central cooler is stopped The machine time, reduce maintenance of equipment expense, improve equipment operation rate.
Accompanying drawing explanation
Fig. 1 is the system flow chart of central cooler waste gas residual heat utilization system of the present invention.
Detailed description of the invention
Below in conjunction with Figure of description, the present invention will be further described.
Embodiment 1
As it is shown in figure 1, the central cooler waste gas residual heat utilization system of the present embodiment, including flue gas recirculation system System;Described smoke circulating system includes being arranged on the exhaust fume collecting hood 2 above central cooler routine waste heat recovery section 1, sets Put the high temperature stacks 3 on exhaust fume collecting hood 2 and the waste heat boiler 7 for recovery waste heat;Described waste heat boiler 7 Smoke inlet connects with described high temperature stacks 3 and central cooler return air duct 10 respectively with exhanst gas outlet, described time Wind pipeline 10 connects with described central cooler routine waste heat recovery section 1;
In the flue of described waste heat boiler 7 flow direction along flue gas be disposed with high pressure section superheater 701, High pressure section vaporizer 702, low pressure stage superheater 703, high pressure section economizer 704, low pressure stage vaporizer 705, Low pressure stage economizer 706 and condensation water heater 707, the flue of described waste heat boiler 7 is outside equipped with high pressure section Drum 708 and low pressure stage drum 709;
The outlet of described low pressure stage economizer 706 connects with the water inlet of described low pressure stage drum 709, institute State low pressure stage vaporizer 705 water inlet to connect with the low pressure stage outlet of described low pressure stage drum 709, described The venthole of low pressure stage vaporizer 705 connects with the air intake of described low pressure stage drum 709, described low pressure stage The air intake of superheater 703 connects with the venthole of described low pressure stage drum 709;
The high pressure section outlet of described low pressure stage drum 709 connects with the water inlet of high pressure section feed pump 710, The outlet of described high pressure section feed pump 710 connects with the water inlet of described high pressure section economizer 704, described The outlet of high pressure section economizer 704 connects with described high pressure section drum 708, described high pressure section vaporizer 702 Water inlet connect with the outlet of described high pressure section drum 708, described high pressure section vaporizer 702 go out vapour Mouth connects with the air intake of described high pressure section drum 708, the air intake of described high pressure section superheater 701 and institute State the venthole connection of high pressure section drum 708;Described low pressure stage drum 709 wear for in boiler to The deoxygenation head of water deoxygenation;
The water inlet of described low pressure stage economizer 706 connects with described UTILIZATION OF VESIDUAL HEAT IN unit outlet, described low Press the venthole of section superheater 703 and the venthole of described high pressure section superheater 701 and described UTILIZATION OF VESIDUAL HEAT IN machine The air intake connection of group;
Described condensation water heater 707 condenses Water flow-path also with the low-pressure heater edge of generating set therrmodynamic system Connection connects.
UTILIZATION OF VESIDUAL HEAT IN power generator turbine 18 that the therrmodynamic system of described UTILIZATION OF VESIDUAL HEAT IN unit includes being sequentially communicated, remaining Heat utilization unit condenser 19 and UTILIZATION OF VESIDUAL HEAT IN unit gland heater 21;Described waste heat power generator turbine is for mending Vapour formula steam turbine;For connecting UTILIZATION OF VESIDUAL HEAT IN unit condenser 19 and UTILIZATION OF VESIDUAL HEAT IN unit gland heater 21 Pipeline on be provided with UTILIZATION OF VESIDUAL HEAT IN unit condensate pump 20.
The water inlet of described low pressure stage economizer 706 and described UTILIZATION OF VESIDUAL HEAT IN unit gland heater 21 outlet Connection, the venthole of described high pressure section superheater 701 connects with the main steam inlet of described steam compensating turbine, The venthole of described low pressure stage superheater 703 connects with the supplementary steam inlet of described steam compensating turbine.
The therrmodynamic system of described generating set includes that the generating set steam turbine 12 being sequentially communicated, generating set coagulate Vapour device 14, generating set gland heater 16 and generating set low-pressure heater 17;Described generating set vapour The output shaft of turbine 12 is connected with electromotor 13;For connecting Generation Unit Condenser 14 and generator unit shaft It is provided with generating set condensate pump 15 on the pipeline of envelope heater 16;
The water inlet of described condensation water heater 707 and the water inlet pipe of described generating set low-pressure heater 17 The outlet pipe of connection, the outlet of described condensation water heater 707 and described generating set low-pressure heater 17 Road connects.
The waste gas residual heat of sintering circular-cooler is carried out comprehensively by the present embodiment central cooler waste gas residual heat utilization system Utilize, by the optimal design-aside of waste heat boiler 7 internal exchanger, waste gas residual heat is carried out Appropriate application, Waste heat boiler 7 internal along flue gas flow be sequentially arranged high pressure section superheater 701, high pressure section vaporizer 702, Low pressure stage superheater 703, high pressure section economizer 704, low pressure stage vaporizer 705, low pressure stage economizer 706 With condensation water heater 707, the steam that wherein high pressure section superheater 701 and low pressure stage superheater 703 produce divides Not entering UTILIZATION OF VESIDUAL HEAT IN power generator turbine 18 as main steam and filling, red switch steam turbine is done work, this steam turbine Either for driving electromotor still all can produce considerable economic benefit for Driving Fan;Condensation water adds Hot device 707 is used for heating the condensation water in power station generator group steam turbine 12 therrmodynamic system, can reduce low pressure and add The regenerative steam amount of hot device, and the regenerative steam saved can continue acting in steam turbine, increases electromotor The generated energy of group.
The optimization by waste heat boiler 7 internal exchanger of the present embodiment central cooler waste gas residual heat utilization system Design achieves the step Appropriate application of heat energy from waste gas, and waste heat boiler 7 uses double laminated structure, high pressure section medium The waste-gas heat absorbing relatively-high temperature produces the most high-grade steam, low pressure stage Absorption of Medium relative low temperature Waste-gas heat produces the most low-grade steam, and this set can fully absorb waste-gas heat, improves waste heat pot The stove 7 effective rate of utilization to heat energy from waste gas;At waste heat boiler 7 afterbody, one-level condensation water heater 707 is set, Waste gas residual heat is absorbed further, further by the low-temperature condensate (about 30 DEG C) of power station generator group Reduce EGT, improve the thermal efficiency of waste heat boiler 7.
The present embodiment central cooler waste gas residual heat utilization system is reasonable by waste heat boiler 7 internal exchanger Layout reduces the return air temperature of central cooler, improves the working environment of the circulating fan 9 in cigarette distinguished and admirable journey downstream, Extend the service life of circulating fan 9;Additionally, due to temperature reduces, the import flue gas of circulating fan 9 Volume reduces the most therewith, and then the energy-saving run of beneficially circulating fan 9.
The present embodiment central cooler waste gas residual heat utilization system is reasonable by waste heat boiler 7 internal exchanger Layout reduces the return air temperature of central cooler, is directly back to central cooler with traditional waste heat boiler 7 exiting flue gas Method compare the cooling effect improving central cooler high temperature section so that the operating condition of central cooler is more nearly Design conditions, reduce owing to arranging of air return system exports the temperature controlled unfavorable shadow of sintering deposit to central cooler Ring, better ensure that the quality of sintering deposit.
The present embodiment central cooler waste gas residual heat utilization system is reasonable by waste heat boiler 7 internal exchanger Layout reduces the return air temperature of central cooler, improves the working environment of central cooler, can reduce the event of central cooler Hinder downtime, reduce maintenance of equipment expense, improve equipment operation rate.
Embodiment 2
On the basis of above-described embodiment, the smoke inlet of described waste heat boiler 7 takes wind pipeline 4 by routine Connecting with described high temperature stacks 3, the direction that described routine takes on wind pipeline 4 along flow of flue gas sets gradually There are the first cleaner unit 5, first-class gauge 27 and afterburning stove 6.
First cleaner unit 5 takes, for removing routine, the particulate matter brought in wind pipeline 4 from central cooler;Afterburning stove 6 Between cleaner unit and waste heat boiler 7, in order to regulate the Gas Parameters entering waste heat boiler 7;This enforcement The example setting by afterburning stove 6, stabilizes the flue gas condition of waste gas afterheat recovery system, solves tradition side Method directly reclaims the problem of the Gas Parameters frequent fluctuation that central cooler waste gas residual heat exists, and improves condensation water and adds The service condition of hot device 707, it is ensured that the stable operation of power station generator group steam turbine 12.The present embodiment leads to Cross the setting of afterburning stove 6, stabilize the import flue gas condition of waste heat boiler 7, it is ensured that waste heat boiler 7 goes out Stablizing of mouth steam parameter, it is ensured that the safety and stablization of UTILIZATION OF VESIDUAL HEAT IN power generator turbine 18 are run.Described often Rule take and are provided with effusion meter on wind pipeline 4, take wind pipeline 4 with metering by routine and enter waste heat boiler 7 Flue gas flow, it is possible to monitoring routine in real time takes the flue gas flow in wind pipeline 4, it is simple to subsequent operation flow process Control.
Embodiment 3
On the basis of above-described embodiment, the central cooler low-temperature zone 29 of the present embodiment is provided with gas skirt 30, It is provided with low temperature chimney 31 on described gas skirt 30;Described low temperature chimney 31 by low temperature take wind pipeline 32 with The air intake connection of described afterburning stove 6, the gas entry of described afterburning stove 6 connects with gas piping;Institute State low temperature to take and on wind pipeline 32, be provided with the second cleaner unit 34 and second gauge 35 along flow of flue gas direction, The smoke inlet of described waste heat boiler 7 is additionally provided with the 3rd effusion meter 28, and the outlet of described low temperature chimney is arranged The entrance having the 5th cigarette air valve 36, described low temperature to take wind pipeline is provided with the 6th cigarette air valve 33.
The present embodiment sintering circular-cooler waste gas residual heat utilization system is by the flue gas (temperature of central cooler low-temperature zone 29 Degree is about about 200 DEG C) it is collected and as the combustion air of afterburning stove 6, the combustion air of high temperature can Ensureing the stable burning of coal gas, the especially stable burning of low-heat value gas, therefore, by central cooler low-temperature zone 29 flue gases are conducive to the afterburning stove 6 utilization to low-heat value gas, meanwhile, afterburning stove 6 as combustion air Stable burning ensure that the thermal source of waste heat boiler 7 is stable, beneficially UTILIZATION OF VESIDUAL HEAT IN unit and generating set Stable operation.
Embodiment 4
On the basis of above-described embodiment, described routine takes wind pipeline 4 arrival end and is provided with the first cigarette air valve 23;The outlet of described high temperature stacks 3 is provided with the second cigarette air valve 24.
The sintering circular-cooler waste gas residual heat comprehensive reutilization system of the present embodiment, normally throws at waste heat boiler 7 During fortune, the first cigarette air valve 23 is opened the second cigarette air valve 24 and is closed, when waste heat boiler 7 forced shutdown One cigarette air valve 23 is closed the second cigarette air valve 24 and is opened;So can when waste heat boiler 7 is properly functioning, Make flue gas farthest carry out heat exchange through waste heat boiler 7, and when waste heat boiler 7 breaks down, make cigarette Gas is discharged by high temperature stacks 3, does not affect the maintenance of waste heat boiler 7.
Embodiment 5
On the basis of above-described embodiment, the entery and delivery port of described generating set low-pressure heater 17 and described The entery and delivery port of condensation water heater 707 is provided with control valve 22.
By the regulation to each control valve 22 aperture, the condensation entering condensation water heater 707 can be regulated Discharge is it can also be used to realize input and the off-the-line of condensation water heater 707.
Embodiment 6
On the basis of above-described embodiment, the exhanst gas outlet of described waste heat boiler is by discharge duct 8 and circulation The air inlet of blower fan 9 is connected, and the air outlet of described circulating fan 9 passes through central cooler return air duct 10 with described Central cooler routine waste heat recovery section 1 is connected, and described central cooler return air duct 10 is provided with diffusing chimney 11 With the 3rd cigarette air valve 25, described diffusing chimney is provided with the 4th cigarette air valve 26.
The low temperature waste gas that circulating fan 9 in the present embodiment exports for making waste heat boiler 7 boosts to overcome pipe Roadlock power;Described diffusing chimney 11 runs for Start-up and Adjustment or the residual neat recovering system of circulating fan 9 or returns Wind pipeline 10 excess flue gas diffuse regulation.
The sintering circular-cooler waste gas residual heat comprehensive reutilization system of the present embodiment, on central cooler return air duct 10 Being provided with the 3rd cigarette air valve 25, play cutting action, the standard-sized sheet when waste heat boiler 7 runs, at waste heat boiler 7 owing to closing when fault is stopped transport, it is to avoid produce the situation that flue gas pours in down a chimney from central cooler when waste heat boiler 7 fault. Diffusing chimney 11 is provided with the 4th cigarette air valve 26, for controlling the exhaust gas volumn discharged by diffusing chimney.
Embodiment 7
On the basis of above-described embodiment, described bootstrap system also includes electromotor, blower fan or water pump, The output shaft of described steam turbine is connected with the power shaft of described electromotor, blower fan or water pump.
Described UTILIZATION OF VESIDUAL HEAT IN power generator turbine 18 can be connected with electromotor, is used for driving electromotor to produce electric energy, Can also be connected with blower fan or water pump, be used for driving blower fan or water pump, directly do work.
Above, only presently preferred embodiments of the present invention, but protection scope of the present invention is not limited thereto, and appoints How those familiar with the art is in the technical scope that the invention discloses, the change that can readily occur in Or replace, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be with The protection domain that claim is defined is as the criterion.

Claims (10)

1. a central cooler waste gas residual heat utilization system, it is characterised in that: include smoke circulating system; Described smoke circulating system includes being arranged on the exhaust fume collecting hood above central cooler routine waste heat recovery section, is arranged on collection High temperature stacks on petticoat pipe and the waste heat boiler for recovery waste heat;The smoke inlet of described waste heat boiler and cigarette Gas outlet connects with described high temperature stacks and conventional waste heat recovery section respectively;
In the flue of described waste heat boiler, the flow direction along flue gas is disposed with high pressure section superheater, high pressure Section vaporizer, low pressure stage superheater, high pressure section economizer, low pressure stage vaporizer, low pressure stage economizer and solidifying Bearing water heater, the flue of described waste heat boiler is outside equipped with high pressure section drum and low pressure stage drum;
The outlet of described low pressure stage economizer connects with the water inlet of described low pressure stage drum, described low pressure stage The water inlet of vaporizer connects with the low pressure stage outlet of described low pressure stage drum, described low pressure stage vaporizer Venthole connects with the air intake of described low pressure stage drum, and the air intake of described low pressure stage superheater is low with described The venthole connection of pressure section drum;
The high pressure section outlet of described low pressure stage drum connects with the water inlet of high pressure section feed pump, described high pressure The section outlet of feed pump connects with the water inlet of described high pressure section economizer, going out of described high pressure section economizer The mouth of a river connects with the water inlet of described high pressure section drum, the water inlet of described high pressure section vaporizer and described high pressure The outlet connection of section drum, the venthole of described high pressure section vaporizer and the air intake of described high pressure section drum Connection, the air intake of described high pressure section superheater connects with the venthole of described high pressure section drum;
The water inlet of described low pressure stage economizer connects with the outlet of described UTILIZATION OF VESIDUAL HEAT IN unit, described low pressure The venthole of the section venthole of superheater and described high pressure section superheater and the air intake of described UTILIZATION OF VESIDUAL HEAT IN unit Connection;
Described condensation water heater is in parallel even along condensing Water flow-path with the low-pressure heater of generating set therrmodynamic system Connect.
2. central cooler waste gas residual heat utilization system as claimed in claim 1, it is characterised in that: described remaining The therrmodynamic system of heat utilization unit includes that the UTILIZATION OF VESIDUAL HEAT IN power generator turbine being sequentially communicated, UTILIZATION OF VESIDUAL HEAT IN unit coagulate Vapour device and UTILIZATION OF VESIDUAL HEAT IN unit gland heater;Described waste heat power generator turbine is steam compensating turbine;For Connect and be provided with UTILIZATION OF VESIDUAL HEAT IN on the pipeline of UTILIZATION OF VESIDUAL HEAT IN unit condenser and UTILIZATION OF VESIDUAL HEAT IN unit gland heater Unit condensate pump.
The water inlet of described low pressure stage economizer connects with described UTILIZATION OF VESIDUAL HEAT IN unit gland heater outlet, The venthole of described high pressure section superheater connects with the main steam inlet of described steam compensating turbine, described low pressure The section venthole of superheater connects with the supplementary steam inlet of described steam compensating turbine.
3. central cooler waste gas residual heat utilization system as claimed in claim 1, it is characterised in that: described Generating set steam turbine that the therrmodynamic system of group of motors includes being sequentially communicated, Generation Unit Condenser, electromotor Group gland heater and generating set low-pressure heater;The output shaft of described generating set steam turbine and electromotor Connect;It is provided with electromotor on the pipeline connecting Generation Unit Condenser and generating set gland heater Group condensate pump;
The water inlet of described condensation water heater connects with the water inlet pipe of described generating set low-pressure heater, The outlet of described condensation water heater connects with the outlet conduit of described generating set low-pressure heater.
4. central cooler waste gas residual heat utilization system as claimed in claim 1, it is characterised in that: described remaining The smoke inlet of heat boiler takes wind pipeline by routine and connects with described high temperature stacks, and described routine takes wind pipeline On be disposed with the first cleaner unit, first-class gauge and afterburning stove along the direction of flow of flue gas.
5. central cooler waste gas residual heat utilization system as claimed in claim 4, it is characterised in that: central cooler It is provided with gas skirt in low-temperature zone, described gas skirt is provided with low temperature chimney;Described low temperature chimney is by low Temperature takes wind pipeline and connects with the air intake of described afterburning stove, the gas entry of described afterburning stove and gas piping Connection;Described low temperature takes and is provided with the second cleaner unit and second gauge on wind pipeline along flow of flue gas direction; The smoke inlet of described waste heat boiler is provided with the 3rd effusion meter.
6. central cooler waste gas residual heat utilization system as claimed in claim 1, it is characterised in that: described The entery and delivery port of group of motors low-pressure heater and the entery and delivery port of described condensation water heater are provided with control Valve processed.
7. as claimed in claim 4 central cooler waste gas residual heat utilization system, it is characterised in that: described often Rule take wind pipeline arrival end and are provided with the first cigarette air valve;The outlet of described high temperature stacks is provided with the second cigarette air-valve Door.
8. central cooler waste gas residual heat utilization system as claimed in claim 1, it is characterised in that: described remaining The exhanst gas outlet of heat boiler is connected with the air inlet of circulating fan by discharge duct, going out of described circulating fan Air port is connected with described central cooler routine waste heat recovery section by central cooler return air duct, described central cooler return air It is provided with diffusing chimney and the 3rd cigarette air valve on pipeline, described diffusing chimney is provided with the 4th cigarette air valve.
9. central cooler waste gas residual heat utilization system as claimed in claim 5, it is characterised in that: described low The outlet of temperature chimney is provided with the 5th cigarette air valve, and described low temperature takes the entrance of wind pipeline and is provided with the 6th cigarette wind Valve.
10. central cooler waste gas residual heat utilization system as claimed in claim 1, it is characterised in that: described Low pressure stage drum is worn for the deoxygenation head for the feedwater deaeration in boiler.
CN201610515445.2A 2016-06-30 2016-06-30 Ring cold machine waste gas residual heat utilization system Active CN105973017B (en)

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CN106643191A (en) * 2017-02-08 2017-05-10 中冶华天工程技术有限公司 Power generation system based on steel smelting furnace and steel rolling heating furnace waste heat integration
CN106679439A (en) * 2017-02-08 2017-05-17 中冶华天工程技术有限公司 Waste heat utilization system for steel rolling heating furnace
CN106839789A (en) * 2017-02-08 2017-06-13 中冶华天工程技术有限公司 A kind of heater for rolling steel residual neat recovering system based on air and coal gas progressive solution
CN106871651A (en) * 2017-02-08 2017-06-20 中冶华天工程技术有限公司 A kind of heater for rolling steel waste heat Optimum utilization system
CN107687767A (en) * 2017-08-15 2018-02-13 中冶华天工程技术有限公司 A kind of sintering deposit residual neat recovering system and its exhaust heat recovering method
WO2019069074A3 (en) * 2017-10-03 2019-06-20 Johnson Matthey Public Limited Company Waste gas emission control system
CN110345461A (en) * 2019-07-12 2019-10-18 大航控股集团节能环保科技股份有限公司 A kind of efficient waste heat electricity generation system

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CN204730682U (en) * 2015-06-30 2015-10-28 北京佰能蓝天科技股份公司 A kind of sintering circular-cooler waste heat recovery cigarette wind apparatus
CN204830910U (en) * 2015-07-06 2015-12-02 南京博纳能源环保科技有限公司 Take sintering and pelletizing waste heat power generation system of after burning
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CN86105222A (en) * 1986-08-14 1987-06-24 西安交通大学 Utilize the low-pressure energy-saving hybrid system of smoke discharging residual heat
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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Publication number Priority date Publication date Assignee Title
CN106643191A (en) * 2017-02-08 2017-05-10 中冶华天工程技术有限公司 Power generation system based on steel smelting furnace and steel rolling heating furnace waste heat integration
CN106679439A (en) * 2017-02-08 2017-05-17 中冶华天工程技术有限公司 Waste heat utilization system for steel rolling heating furnace
CN106839789A (en) * 2017-02-08 2017-06-13 中冶华天工程技术有限公司 A kind of heater for rolling steel residual neat recovering system based on air and coal gas progressive solution
CN106871651A (en) * 2017-02-08 2017-06-20 中冶华天工程技术有限公司 A kind of heater for rolling steel waste heat Optimum utilization system
CN106871651B (en) * 2017-02-08 2019-02-19 中冶华天工程技术有限公司 A kind of heater for rolling steel waste heat Optimum utilization system
CN106679439B (en) * 2017-02-08 2019-02-19 中冶华天工程技术有限公司 A kind of heater for rolling steel afterheat utilizing system
CN107687767A (en) * 2017-08-15 2018-02-13 中冶华天工程技术有限公司 A kind of sintering deposit residual neat recovering system and its exhaust heat recovering method
CN107687767B (en) * 2017-08-15 2019-07-26 中冶华天工程技术有限公司 A kind of sinter residual neat recovering system and its exhaust heat recovering method
WO2019069074A3 (en) * 2017-10-03 2019-06-20 Johnson Matthey Public Limited Company Waste gas emission control system
CN110345461A (en) * 2019-07-12 2019-10-18 大航控股集团节能环保科技股份有限公司 A kind of efficient waste heat electricity generation system

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