CN105973017B - Ring cold machine waste gas residual heat utilization system - Google Patents

Ring cold machine waste gas residual heat utilization system Download PDF

Info

Publication number
CN105973017B
CN105973017B CN201610515445.2A CN201610515445A CN105973017B CN 105973017 B CN105973017 B CN 105973017B CN 201610515445 A CN201610515445 A CN 201610515445A CN 105973017 B CN105973017 B CN 105973017B
Authority
CN
China
Prior art keywords
utilization
pressure
low
low pressure
pressure stage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201610515445.2A
Other languages
Chinese (zh)
Other versions
CN105973017A (en
Inventor
江文豪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huatian Engineering and Technology Corp MCC
Original Assignee
Huatian Engineering and Technology Corp MCC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huatian Engineering and Technology Corp MCC filed Critical Huatian Engineering and Technology Corp MCC
Priority to CN201610515445.2A priority Critical patent/CN105973017B/en
Publication of CN105973017A publication Critical patent/CN105973017A/en
Application granted granted Critical
Publication of CN105973017B publication Critical patent/CN105973017B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 present invention discloses a kind of ring cold machine waste gas residual heat utilization system, including smoke circulating system;Smoke circulating system includes exhaust fume collecting hood, high temperature stacks and waste heat boiler;Exhaust-heat boiler flue gas entrance and exhanst gas outlet are connected to high temperature stacks and return air duct respectively;Waste heat boiler flue is disposed with high pressure section superheater, high pressure section evaporator, low pressure stage superheater, high pressure section economizer, low pressure stage evaporator, low pressure stage economizer and condensation water heater, and high pressure section drum and low pressure stage drum are provided with outside waste heat boiler flue;Low pressure stage economizer water inlet is connected to UTILIZATION OF VESIDUAL HEAT IN unit water outlet, and low pressure stage superheater venthole and high pressure section superheater venthole are connected to UTILIZATION OF VESIDUAL HEAT IN unit air intake;Condensation water heater water inlet is connected to generating set therrmodynamic system low-pressure heater water inlet, the connection of condensation water heater water outlet therrmodynamic system low-pressure heater water outlet.The present invention can improve ring cold machine residual heat integrative utilization ratio.

Description

Ring cold machine waste gas residual heat utilization system
Technical field
The present invention relates to the field of energy-saving technology of steel industry more particularly to a kind of ring cold machine waste gas residual heat comprehensive utilization systems System.
Background technology
In each process of steel production, sintering circuit is big power consumer, and energy consumption is only second to Iron-smelting.Sintered ring Cold is the postprocessing device of sintering process, for the temperature of sinter to be cooled under 150 DEG C.The high temperature of ring cold machine is useless Gas is a valuable residual heat resources, by taking the ring cold machine of conventional 198m2 sintering machines configuration as an example, only one section of high-temp waste gas of ring cold machine The flow of (temperature is about 350~450 DEG C) is as high as 200,000 Nm3/h, if the waste gas residual heat of ring cold machine can be made full use of, can receive Obtain considerable economic benefit.
Wind pipeline, waste heat boiler, circulated air are taken currently, mainly being used for the Land use systems of ring cold machine waste gas residual heat Machine, ring cold machine return air duct form the form of circulation loop, i.e., by taking wind pipeline to send the high-temp waste gas of ring cold machine to waste heat Boiler exchanges heat, and the low-temperature flue gas of waste heat boiler discharge enters circulating fan, is returned by ring cold machine after being pressurizeed by circulating fan Wind pipeline returns to ring cold machine.The program can generate considerable economic benefit, and since exhaust gas realizes closed cycle, effectively keep away Problem of environmental pollution caused by having exempted from granular material discharged in exhaust gas, therefore it has become the ring cold machine waste heat of current most mainstream and returns Debit's formula, but the program still has larger deficiency:First, heat boiler outlet smoke temperature is still up to 150 DEG C or so, compared with High return air temperature can adversely affect the operation of ring cold machine:The higher operation ring for leading to ring cold machine of ring cold machine cooling wind temperature The problems such as border deteriorates, and static and dynamic sealing is caused to be easily damaged, and accelerates ring cold machine frame deformation, and ring cold machine couples position weld cracking; Secondly as the cooling air quantity of ring cold machine is very big, the exhaust gas that 150 DEG C or so of heat boiler outlet contains huge sensible heat money Source, which still has prodigious use value, if being directly back to ring cold machine in the usual way, although can improve Ring cold machine high temperature section flue-gas temperature is contributed to improve waste heat boiler to a certain extent, but there are still larger energy waves Take.
Invention content
In view of the above-mentioned problems, the present invention provides a kind of ring cold machine waste gas residual heat that can fully recycle ring cold machine waste gas residual heat Utilization system.
In order to achieve the above objectives, ring cold machine waste gas residual heat utilization system of the present invention, including smoke circulating system;It is described Smoke circulating system includes the exhaust fume collecting hood being arranged above ring cold machine routine waste heat recovery section, the high temperature cigarette being arranged on exhaust fume collecting hood Chimney and waste heat boiler for recovery waste heat;The smoke inlet and exhanst gas outlet of the waste heat boiler respectively with the high temperature stacks It is connected to conventional waste heat recovery section;
In the flue of the waste heat boiler high pressure section superheater, high pressure section evaporation are disposed with along the flow direction of flue gas Device, low pressure stage superheater, high pressure section economizer, low pressure stage evaporator, low pressure stage economizer and condensation water heater, the waste heat It is provided with high pressure section drum and low pressure stage drum outside the flue of boiler;
The water outlet of the low pressure stage economizer is connected to the water inlet of the low pressure stage drum, the low pressure stage evaporator Water inlet be connected to the low pressure stage water outlet of the low pressure stage drum, the venthole of the low pressure stage evaporator and the low pressure The air intake connection of section drum, the air intake of the low pressure stage superheater are connected to the venthole of the low pressure stage drum;
The high pressure section water outlet of the low pressure stage drum is connected to the water inlet of high pressure section feed pump, the high pressure section water supply The water outlet of pump is connected to the water inlet of the high pressure section economizer, water outlet and the high pressure section of the high pressure section economizer The water inlet of drum is connected to, and the water inlet of the high pressure section evaporator is connected to the water outlet of the high pressure section drum, the height Pressure section evaporator venthole be connected to the air intake of the high pressure section drum, the air intake of the high pressure section superheater with it is described The venthole of high pressure section drum is connected to;
The water inlet of the low pressure stage economizer is connected to the water outlet of the UTILIZATION OF VESIDUAL HEAT IN unit, the low pressure stage overheat The venthole of the venthole of device and the high pressure section superheater is connected to the air intake of the UTILIZATION OF VESIDUAL HEAT IN unit;
The condensation water heater and the low-pressure heater of generating set therrmodynamic system are connected in parallel along condensation Water flow-path.
Further, the therrmodynamic system of the UTILIZATION OF VESIDUAL HEAT IN unit include the UTILIZATION OF VESIDUAL HEAT IN power generator turbine being sequentially communicated, UTILIZATION OF VESIDUAL HEAT IN unit condenser and UTILIZATION OF VESIDUAL HEAT IN unit gland heater;The waste heat power generator turbine is steam compensating turbine; It is provided with UTILIZATION OF VESIDUAL HEAT IN unit on pipeline for connecting UTILIZATION OF VESIDUAL HEAT IN unit condenser and UTILIZATION OF VESIDUAL HEAT IN unit gland heater Condensate pump.
The water inlet of the low pressure stage economizer is connected to the UTILIZATION OF VESIDUAL HEAT IN unit gland heater water outlet, the height The venthole of pressure section superheater is connected to the main steam inlet of the steam compensating turbine, the venthole of the low pressure stage superheater It is connected to the supplement steam inlet of the steam compensating turbine.
Further, the therrmodynamic system of the generating set includes generating set steam turbine, the generating set being sequentially communicated Condenser, generating set axle envelope heater and generating set low-pressure heater;The output shaft and hair of the generating set steam turbine Motor connects;Generating set condensation is provided on pipeline for connecting Generation Unit Condenser and generating set axle envelope heater Water pump;
The water inlet of the condensation water heater is connected to the water inlet pipe of the generating set low-pressure heater, described solidifying The water outlet for bearing water heater is connected to the outlet conduit of the generating set low-pressure heater.
Further, the smoke inlet of the waste heat boiler takes wind pipeline to be connected to the high temperature stacks by conventional, institute Stating routine takes the direction on wind pipeline along flow of flue gas to be disposed with the first deduster, first flowmeter and afterburning stove.
Further, it is provided with gas gathering mask in ring cold machine low-temperature zone, low temperature chimney is provided on the gas gathering mask;It is described low Warm chimney takes wind pipeline and the air intake of the afterburning stove to be connected to by low temperature, the gas entry and gas pipe of the afterburning stove Road is connected to;The low temperature takes wind pipeline upper edge flow of flue gas direction to be provided with the second deduster and second flowmeter.
Further, the water-in and water-out of the entery and delivery port and the condensation water heater of the generating set low-pressure heater Mouth is both provided with control valve.
Further, the routine takes wind pipeline arrival end to be provided with the first cigarette air valve;The high temperature stacks outlet is set It is equipped with the second cigarette air valve.
Further, it is provided with third flowmeter in the smoke inlet pipelines of the waste heat boiler.
Further, the exhanst gas outlet of the waste heat boiler is connected by discharge duct with the air inlet of circulating fan, institute The air outlet for stating circulating fan is connected by ring cold machine return air duct with the ring cold machine routine waste heat recovery section, the ring cold machine It is provided with diffusing chimney and third cigarette air valve on return air duct, the 4th cigarette air valve is provided on the diffusing chimney.
Further, the outlet of the low temperature chimney is provided with the 5th cigarette air valve, and the low temperature takes the entrance of wind pipeline It is provided with the 6th cigarette air valve.
Further, the low pressure stage drum is worn for the deoxygenation head for the feedwater deaeration in boiler.
Ring cold machine waste gas residual heat utilization system of the present invention comprehensively utilizes the waste gas residual heat of sintering circular-cooler, leads to The optimal design-aside for crossing waste heat boiler internal exchanger rationally utilizes waste gas residual heat, along flue gas inside waste heat boiler Flow be sequentially arranged high pressure section superheater, high pressure section evaporator, low pressure stage superheater, high pressure section economizer, low pressure stage evaporator, The steam that low pressure stage economizer and condensation water heater, wherein high pressure section superheater and low pressure stage superheater generate is respectively as master Steam and filling enter UTILIZATION OF VESIDUAL HEAT IN power generator turbine, the acting of red switch steam turbine, which is either used to drive generator Or it can generate considerable economic benefit for Driving Fan;Condensation water heater is used for heating power station generator group steam turbine Condensed water in therrmodynamic system can reduce the regenerative steam amount of low-pressure heater, and the regenerative steam saved can be in steam turbine In continue to do work, increase the generated energy of generating set.
Ring cold machine waste gas residual heat utilization system of the present invention is realized by the optimization design of waste heat boiler internal exchanger The step of heat energy from waste gas rationally utilizes, and waste heat boiler is using double laminated structures, the waste gas heat of high pressure section Absorption of Medium relatively-high temperature Amount generates relatively high-grade steam, and the waste-gas heat of low pressure stage Absorption of Medium relative low temperature generates relatively low-grade steam, This set can fully absorb waste-gas heat, improve effective rate of utilization of the waste heat boiler to heat energy from waste gas;In waste heat boiler tail portion Level-one condensation water heater is set, is further absorbed more than exhaust gas by the low-temperature condensate (30 DEG C or so) of power station generator group Heat further decreases exhaust gas temperature, improves the thermal efficiency of waste heat boiler.
Ring cold machine waste gas residual heat utilization system of the present invention is reduced by the rational deployment of waste heat boiler internal exchanger The return air temperature of ring cold machine, improves the working environment of the circulating fan in the distinguished and admirable journey downstream of cigarette, extends the fortune of circulating fan The row service life;Further, since temperature reduces, the import flue gas volume of circulating fan also reduces therewith, and then is conducive to circulating fan Energy-saving run.
Ring cold machine waste gas residual heat utilization system of the present invention is reduced by the rational deployment of waste heat boiler internal exchanger The return air temperature of ring cold machine, it is cold to improve ring compared with traditional heat boiler outlet flue gas is directly back to the method for ring cold machine The cooling effect of machine high temperature section so that the operating condition of ring cold machine is more nearly design conditions, reduces due to air return system Setting exports the temperature controlled adverse effect of sinter to ring cold machine, better ensures that the quality of sinter.
Ring cold machine waste gas residual heat utilization system of the present invention is reduced by the rational deployment of waste heat boiler internal exchanger The return air temperature of ring cold machine, improves the working environment of ring cold machine, can reduce the downtime of ring cold machine, reduces equipment Maintenance cost improves equipment operation rate.
Description of the drawings
Fig. 1 is the system flow chart of ring cold machine waste gas residual heat utilization system of the present invention.
Specific implementation mode
The present invention will be further described with reference to the accompanying drawings of the specification.
Embodiment 1
As shown in Figure 1, the ring cold machine waste gas residual heat utilization system of the present embodiment, including smoke circulating system;It is described Smoke circulating system includes the exhaust fume collecting hood 2 being arranged above ring cold machine routine waste heat recovery section 1, the height being arranged on exhaust fume collecting hood 2 Warm chimney 3 and waste heat boiler 7 for recovery waste heat;The smoke inlet and exhanst gas outlet of the waste heat boiler 7 respectively with it is described High temperature stacks 3 are connected to ring cold machine return air duct 10, and the return air duct 10 connects with the ring cold machine routine waste heat recovery section 1 It is logical;
In the flue of the waste heat boiler 7 high pressure section superheater 701, high pressure section are disposed with along the flow direction of flue gas Evaporator 702, low pressure stage superheater 703, high pressure section economizer 704, low pressure stage evaporator 705, low pressure stage economizer 706 and solidifying Heater 707 is born water, high pressure section drum 708 and low pressure stage drum 709 are provided with outside the flue of the waste heat boiler 7;
The water outlet of the low pressure stage economizer 706 is connected to the water inlet of the low pressure stage drum 709, the low pressure stage 705 water inlet of evaporator is connected to the low pressure stage water outlet of the low pressure stage drum 709, and the low pressure stage evaporator 705 goes out Steam ports is connected to the air intake of the low pressure stage drum 709, the air intake of the low pressure stage superheater 703 and the low pressure stage pot The venthole connection of cylinder 709;
The high pressure section water outlet of the low pressure stage drum 709 is connected to the water inlet of high pressure section feed pump 710, the high pressure The water outlet of section feed pump 710 is connected to the water inlet of the high pressure section economizer 704, and the high pressure section economizer 704 goes out The mouth of a river is connected to the high pressure section drum 708, the water inlet of the high pressure section evaporator 702 and the high pressure section drum 708 Water outlet is connected to, and the venthole of the high pressure section evaporator 702 is connected to the air intake of the high pressure section drum 708, the height The air intake of pressure section superheater 701 is connected to the venthole of the high pressure section drum 708;The low pressure stage drum 709 wears use In the deoxygenation head for the feedwater deaeration in boiler;
The water inlet of the low pressure stage economizer 706 is connected to the UTILIZATION OF VESIDUAL HEAT IN unit water outlet, the low pressure stage mistake The venthole of the venthole of hot device 703 and the high pressure section superheater 701 is connected to the air intake of the UTILIZATION OF VESIDUAL HEAT IN unit;
Along condensing, Water flow-path is in parallel to be connected the condensation water heater 707 with the low-pressure heater of generating set therrmodynamic system It connects.
The therrmodynamic system of the UTILIZATION OF VESIDUAL HEAT IN unit includes UTILIZATION OF VESIDUAL HEAT IN power generator turbine 18, the UTILIZATION OF VESIDUAL HEAT IN being sequentially communicated Unit condenser 19 and UTILIZATION OF VESIDUAL HEAT IN unit gland heater 21;The waste heat power generator turbine is steam compensating turbine;For It is provided with UTILIZATION OF VESIDUAL HEAT IN unit on the pipeline of connection UTILIZATION OF VESIDUAL HEAT IN unit condenser 19 and UTILIZATION OF VESIDUAL HEAT IN unit gland heater 21 Condensate pump 20.
The water inlet of the low pressure stage economizer 706 is connected to 21 water outlet of UTILIZATION OF VESIDUAL HEAT IN unit gland heater, The venthole of the high pressure section superheater 701 is connected to the main steam inlet of the steam compensating turbine, the low pressure stage overheat The venthole of device 703 is connected to the supplement steam inlet of the steam compensating turbine.
The therrmodynamic system of the generating set includes generating set steam turbine 12, the Generation Unit Condenser being sequentially communicated 14, generating set axle envelope heater 16 and generating set low-pressure heater 17;The output shaft of the generating set steam turbine 12 with Generator 13 connects;It is provided with power generation on pipeline for connecting Generation Unit Condenser 14 and generating set axle envelope heater 16 Unit condensate pump 15;
The water inlet of the condensation water heater 707 is connected to the water inlet pipe of the generating set low-pressure heater 17, The water outlet of the condensation water heater 707 is connected to the outlet conduit of the generating set low-pressure heater 17.
The present embodiment ring cold machine waste gas residual heat utilization system comprehensively utilizes the waste gas residual heat of sintering circular-cooler, By the optimal design-aside of 7 internal exchanger of waste heat boiler, waste gas residual heat is rationally utilized, inside waste heat boiler 7 along Flue gas flow is sequentially arranged high pressure section superheater 701, high pressure section evaporator 702, low pressure stage superheater 703, high pressure section economizer 704, low pressure stage evaporator 705, low pressure stage economizer 706 and condensation water heater 707, wherein high pressure section superheater 701 and low The steam that pressure section superheater 703 generates enters UTILIZATION OF VESIDUAL HEAT IN power generator turbine 18, red switch steamer respectively as main steam and filling Machine does work, which, which is either used to drive generator to be still used for Driving Fan, can generate considerable economic benefit;It is solidifying It bears water heater 707 to be used for heating the condensed water in 12 therrmodynamic system of power station generator group steam turbine, low-pressure heater can be reduced Regenerative steam amount, and save regenerative steam can continue to do work in steam turbine, increase the generated energy of generating set.
The present embodiment ring cold machine waste gas residual heat utilization system is real by the optimization design of 7 internal exchanger of waste heat boiler The step for having showed heat energy from waste gas rationally utilizes, and waste heat boiler 7 is using double laminated structures, the exhaust gas of high pressure section Absorption of Medium relatively-high temperature Heat generates relatively high-grade steam, and the waste-gas heat of low pressure stage Absorption of Medium relative low temperature generates relatively low-grade steaming Vapour, this set can fully absorb waste-gas heat, improve effective rate of utilization of the waste heat boiler 7 to heat energy from waste gas;In waste heat boiler 7 Level-one condensation water heater 707 is arranged in tail portion, is further inhaled by the low-temperature condensate (30 DEG C or so) of power station generator group Waste gas residual heat is received, exhaust gas temperature is further decreased, improves the thermal efficiency of waste heat boiler 7.
The present embodiment ring cold machine waste gas residual heat utilization system is dropped by the rational deployment of 7 internal exchanger of waste heat boiler The low return air temperature of ring cold machine, improves the working environment of the circulating fan 9 in the distinguished and admirable journey downstream of cigarette, extends circulating fan 9 Service life;Further, since temperature reduces, the import flue gas volume of circulating fan 9 also reduces therewith, and then is conducive to recycle The energy-saving run of wind turbine 9.
The present embodiment ring cold machine waste gas residual heat utilization system is dropped by the rational deployment of 7 internal exchanger of waste heat boiler The low return air temperature of ring cold machine, improves compared with traditional 7 exiting flue gas of waste heat boiler is directly back to the method for ring cold machine The cooling effect of ring cold machine high temperature section so that the operating condition of ring cold machine is more nearly design conditions, reduces due to return air system The setting of system exports the temperature controlled adverse effect of sinter to ring cold machine, better ensures that the quality of sinter.
The present embodiment ring cold machine waste gas residual heat utilization system is dropped by the rational deployment of 7 internal exchanger of waste heat boiler The low return air temperature of ring cold machine, improves the working environment of ring cold machine, can reduce the downtime of ring cold machine, reduction is set Standby maintenance cost, improves equipment operation rate.
Embodiment 2
On the basis of the above embodiments, the smoke inlet of the waste heat boiler 7 takes wind pipeline 4 and the height by conventional Warm chimney 3 is connected to, and the routine takes the direction on wind pipeline 4 along flow of flue gas to be disposed with the first deduster 5, first-class Gauge 27 and afterburning stove 6.
First deduster 5 takes the particulate matter brought into from ring cold machine in wind pipeline 4 for removing routine;Afterburning stove 6, which is located at, to be removed Between dirt device and waste heat boiler 7, to adjust the Gas Parameters for entering waste heat boiler 7;The present embodiment is set by afterburning stove 6 It sets, stabilizes the flue gas condition of waste gas afterheat recovery system, solve conventional method and directly recycle the presence of ring cold machine waste gas residual heat Gas Parameters frequent fluctuation the problem of, improve the service condition of condensation water heater 707, ensure that power station generator group vapour The stable operation of turbine 12.The present embodiment stabilizes the import flue gas condition of waste heat boiler 7 by the setting of afterburning stove 6, ensures The stabilization of 7 outlet vapor parameter of waste heat boiler ensure that the safety and stablization operation of UTILIZATION OF VESIDUAL HEAT IN power generator turbine 18.It is described Routine takes is equipped with flowmeter on wind pipeline 4, to measure through the conventional flue gas flow for taking wind pipeline 4 to enter waste heat boiler 7, energy Enough conventional flue gas flows taken in wind pipeline 4 of real time monitoring, are convenient for the control of subsequent operation flow.
Embodiment 3
On the basis of the above embodiments, gas gathering mask 30, the collection are provided in the ring cold machine low-temperature zone 29 of the present embodiment Low temperature chimney 31 is provided on gas hood 30;The low temperature chimney 31 takes the air of wind pipeline 32 and the afterburning stove 6 by low temperature Entrance is connected to, and the gas entry of the afterburning stove 6 is connected to gas piping;The low temperature takes 32 upper edge flow of flue gas side of wind pipeline To the second deduster 34 and second flowmeter 35 is provided with, the smoke inlet of the waste heat boiler 7 is additionally provided with third flowmeter 28, the outlet of the low temperature chimney is provided with the 5th cigarette air valve 36, and the low temperature takes the entrance of wind pipeline to be provided with the 6th cigarette Air valve 33.
By the flue gas of ring cold machine low-temperature zone 29, (temperature is about the present embodiment sintering circular-cooler waste gas residual heat utilization system 200 DEG C or so) it is collected and as the combustion air of afterburning stove 6, what the combustion air of high temperature can ensure coal gas stablizes combustion It burns, especially stablizing for low-heat value gas is burnt, and therefore, is conducive to afterburning using 29 flue gas of ring cold machine low-temperature zone as combustion air Utilization of the stove 6 to low-heat value gas, meanwhile, the stable burning of afterburning stove 6 can ensure that the heat source of waste heat boiler 7 is stablized, favorably In the stable operation of UTILIZATION OF VESIDUAL HEAT IN unit and generating set.
Embodiment 4
On the basis of the above embodiments, the routine takes 4 arrival end of wind pipeline to be provided with the first cigarette air valve 23;It is described The outlet of 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, in 7 bringing normally into operation of waste heat boiler One cigarette air valve 23 is opened the second cigarette air valve 24 and is closed, and in 7 forced shutdown of waste heat boiler, the first cigarette air valve 23 closes the Two cigarette air valves 24 are opened;Flue gas can be made to pass through waste heat boiler 7 to the greatest extent in 7 normal operation of waste heat boiler in this way It exchanges heat, and when the failure of waste heat boiler 7, so that flue gas is passed through high temperature stacks 3 and discharged, does not influence waste heat boiler 7 Maintenance.
Embodiment 5
On the basis of the above embodiments, the entery and delivery port of the generating set low-pressure heater 17 and the condensed water The entery and delivery port of heater 707 is both provided with control valve 22.
By the adjusting to 22 aperture of each control valve, the condensing water flow into condensation water heater 707 can be adjusted, It can also be used for realizing the input and off-the-line of condensation water heater 707.
Embodiment 6
On the basis of the above embodiments, the exhanst gas outlet of the waste heat boiler passes through discharge duct 8 and circulating fan 9 Air inlet is connected, and the air outlet of the circulating fan 9 passes through ring cold machine return air duct 10 and the ring cold machine routine waste heat recovery Section 1 is connected, and is provided with diffusing chimney 11 and third cigarette air valve 25 on the ring cold machine return air duct 10, on the diffusing chimney It is provided with the 4th cigarette air valve 26.
The low temperature waste gas that circulating fan 9 in the present embodiment is used to that waste heat boiler 7 to be made to export boosts to overcome pipe resistance; Start-up and Adjustment or residual neat recovering system operation or return air duct 10 excessive flue gas of the diffusing chimney 11 for circulating fan 9 Diffuse adjusting.
The sintering circular-cooler waste gas residual heat comprehensive reutilization system of the present embodiment is equipped on ring cold machine return air duct 10 Third cigarette air valve 25, rise cutting action, the standard-sized sheet when waste heat boiler 7 is run, waste heat boiler 7 due to failure is stopped transport when close It closes, avoids generating the case where flue gas pours in down a chimney from ring cold machine in 7 failure of waste heat boiler.4th cigarette is installed on diffusing chimney 11 Air valve 26, for controlling the exhaust gas volumn discharged by diffusing chimney.
Embodiment 7
On the basis of the above embodiments, the afterheat utilizing system further includes generator, wind turbine or water pump, the steamer The input axis connection of the output shaft of machine and the generator, wind turbine or water pump.
The UTILIZATION OF VESIDUAL HEAT IN power generator turbine 18 can be connected with generator, for driving generator to produce electricl energy, also may be used To be connected with wind turbine or water pump, for driving wind turbine or water pump, directly do work.
More than, only presently preferred embodiments of the present invention, but scope of protection of the present invention is not limited thereto, and it is any to be familiar with sheet In the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in should all be covered those skilled in the art Within protection scope of the present invention.Therefore, the scope of protection of the present invention shall be subject to the scope of protection defined by the claims.

Claims (8)

1. a kind of ring cold machine waste gas residual heat utilization system, it is characterised in that:Including smoke circulating system;The flue gas recirculation System includes the exhaust fume collecting hood being arranged above ring cold machine routine waste heat recovery section, the high temperature stacks being arranged on exhaust fume collecting hood and is used for The waste heat boiler of recovery waste heat;The smoke inlet and exhanst gas outlet of the waste heat boiler respectively with the high temperature stacks and routine more than Heat-recovery section is connected to;
In the flue of the waste heat boiler along the flow direction of flue gas be disposed with high pressure section superheater, high pressure section evaporator, Low pressure stage superheater, high pressure section economizer, low pressure stage evaporator, low pressure stage economizer and condensation water heater, the waste heat pot It is provided with high pressure section drum and low pressure stage drum outside the flue of stove;
The water outlet of the low pressure stage economizer is connected to the water inlet of the low pressure stage drum, and the low pressure stage evaporator enters The mouth of a river is connected to the low pressure stage water outlet of the low pressure stage drum, the venthole of the low pressure stage evaporator and the low pressure stage pot The air intake connection of cylinder, the air intake of the low pressure stage superheater are connected to the venthole of the low pressure stage drum;
The high pressure section water outlet of the low pressure stage drum is connected to the water inlet of high pressure section feed pump, the high pressure section feed pump Water outlet is connected to the water inlet of the high pressure section economizer, the water outlet of the high pressure section economizer and the high pressure section drum Water inlet connection, the water inlet of the high pressure section evaporator is connected to the water outlet of the high pressure section drum, the high pressure section The venthole of evaporator is connected to the air intake of the high pressure section drum, air intake and the high pressure of the high pressure section superheater The venthole connection of section drum;
The water inlet of the low pressure stage economizer is connected to the water outlet of UTILIZATION OF VESIDUAL HEAT IN unit, and the low pressure stage superheater goes out vapour The venthole of mouth and the high pressure section superheater is connected to the air intake of the UTILIZATION OF VESIDUAL HEAT IN unit;
The condensation water heater and the low-pressure heater of generating set therrmodynamic system are connected in parallel along condensation Water flow-path;
The therrmodynamic system of the UTILIZATION OF VESIDUAL HEAT IN unit includes that the UTILIZATION OF VESIDUAL HEAT IN power generator turbine being sequentially communicated, UTILIZATION OF VESIDUAL HEAT IN unit are solidifying Vapour device and UTILIZATION OF VESIDUAL HEAT IN unit gland heater;The UTILIZATION OF VESIDUAL HEAT IN power generator turbine is steam compensating turbine;It is remaining for connecting UTILIZATION OF VESIDUAL HEAT IN unit condensate pump is provided on the pipeline of heat utilization unit condenser and UTILIZATION OF VESIDUAL HEAT IN unit gland heater;
The water inlet of the low pressure stage economizer is connected to the UTILIZATION OF VESIDUAL HEAT IN unit gland heater water outlet, the high pressure section The venthole of superheater is connected to the main steam inlet of the steam compensating turbine, the venthole of the low pressure stage superheater and institute State the supplement steam inlet connection of steam compensating turbine;
The smoke inlet of the waste heat boiler takes wind pipeline to be connected to the high temperature stacks by conventional, and the routine takes wind pipeline On along the direction of flow of flue gas be disposed with the first deduster, first flowmeter and afterburning stove.
2. ring cold machine waste gas residual heat utilization system as described in claim 1, it is characterised in that:The heating power of the generating set System includes the generating set steam turbine being sequentially communicated, Generation Unit Condenser, generating set axle envelope heater and generating set Low-pressure heater;The output shaft of the generating set steam turbine is connect with generator;For connecting Generation Unit Condenser and hair It is provided with generating set condensate pump on the pipeline of motor group gland heater;
The water inlet of the condensation water heater is connected to the water inlet pipe of the generating set low-pressure heater, the condensed water The water outlet of heater is connected to the outlet conduit of the generating set low-pressure heater.
3. ring cold machine waste gas residual heat utilization system as described in claim 1, it is characterised in that:It is arranged in ring cold machine low-temperature zone There is gas gathering mask, low temperature chimney is provided on the gas gathering mask;The low temperature chimney takes wind pipeline and the afterburning stove by low temperature Air intake connection, the gas entry of the afterburning stove is connected to gas piping;The low temperature takes wind pipeline upper edge flue gas stream Dynamic direction is provided with the second deduster and second flowmeter;The smoke inlet of the waste heat boiler is provided with third flowmeter.
4. ring cold machine waste gas residual heat utilization system as described in claim 1, it is characterised in that:The generating set low pressure adds The entery and delivery port of the entery and delivery port of hot device and the condensation water heater is both provided with control valve.
5. ring cold machine waste gas residual heat utilization system as described in claim 1, it is characterised in that:The routine takes wind pipeline to enter Mouth end is provided with the first cigarette air valve;The high temperature stacks outlet is provided with the second cigarette air valve.
6. ring cold machine waste gas residual heat utilization system as described in claim 1, it is characterised in that:The flue gas of the waste heat boiler Outlet is connected by discharge duct with the air inlet of circulating fan, and the air outlet of the circulating fan passes through ring cold machine return air duct It is connected with the ring cold machine routine waste heat recovery section, diffusing chimney and third cigarette air-valve is provided on the ring cold machine return air duct , it is provided with the 4th cigarette air valve on the diffusing chimney.
7. ring cold machine waste gas residual heat utilization system as claimed in claim 3, it is characterised in that:The outlet of the low temperature chimney It is provided with the 5th cigarette air valve, the low temperature takes the entrance of wind pipeline to be provided with the 6th cigarette air valve.
8. ring cold machine waste gas residual heat utilization system as described in claim 1, it is characterised in that:The 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)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610515445.2A CN105973017B (en) 2016-06-30 2016-06-30 Ring cold machine waste gas residual heat utilization system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610515445.2A CN105973017B (en) 2016-06-30 2016-06-30 Ring cold machine waste gas residual heat utilization system

Publications (2)

Publication Number Publication Date
CN105973017A CN105973017A (en) 2016-09-28
CN105973017B true CN105973017B (en) 2018-07-31

Family

ID=56953694

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610515445.2A Active CN105973017B (en) 2016-06-30 2016-06-30 Ring cold machine waste gas residual heat utilization system

Country Status (1)

Country Link
CN (1) CN105973017B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
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
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
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
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
GB201716132D0 (en) * 2017-10-03 2017-11-15 Johnson Matthey Plc Emissions 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

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54153703A (en) * 1978-05-26 1979-12-04 Nippon Kokan Kk <Nkk> Recovery of waste air sensible heat in systematically separated cool air cooling system
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
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
CN205940176U (en) * 2016-06-30 2017-02-08 中冶华天工程技术有限公司 System is used multipurposely to cold quick -witted waste gas waste heat of ring

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54153703A (en) * 1978-05-26 1979-12-04 Nippon Kokan Kk <Nkk> Recovery of waste air sensible heat in systematically separated cool air cooling system
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
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
CN205940176U (en) * 2016-06-30 2017-02-08 中冶华天工程技术有限公司 System is used multipurposely to cold quick -witted waste gas waste heat of ring

Also Published As

Publication number Publication date
CN105973017A (en) 2016-09-28

Similar Documents

Publication Publication Date Title
CN102080582B (en) Coal-fired power generation and waste heat power generation coupling system for private station of cement kiln
CN201852474U (en) Combined recovery and power generation system for waste heat in flue gas of sintering machine and waste gas of cooling machine
CN102519067B (en) Heating energy saving device with additional back pressure generator for extraction condensing unit and heating energy saving method
CN103644743B (en) Combination system for efficiently using waste heat in iron mine sintering cooling process
CN101178017A (en) Method for recycling and regenerating steel plant residual heat boiler saturated steam
CN202328165U (en) Smoke energy cascaded utilization system and thermal power generator set adopting same
TWI645104B (en) Fossil fuel power plant
CN203501144U (en) Waste heat recovery system for gas-fired boiler
CN106052407B (en) heating furnace waste heat comprehensive utilization system
CN101706106B (en) Recovering device for afterheat of garbage incineration furnace
CN103244944B (en) Air preheating system and method performing steam extraction by utilizing steam turbine
CN204739568U (en) Energy saving and emission reduction system that horizontal phase transition heat exchanger and prefix type hydrophily formula GGH unite
CN103234362B (en) Device and process for generating power through efficient recovery of waste heat of sintered ores
JP2011174652A (en) Exhaust heat power generation method and system
CN101392992B (en) Silicon smelting electric furnace waste heat power generation process flow and configuration
CN103089439B (en) Boulez pauses-steam Rankine-organic Rankine combined cycle cogeneration device
CN201103894Y (en) Saturated steam heating stove
WO2017219656A1 (en) Gas turbine and pressurized water reactor steam turbine combined circulation system
CN105737123B (en) Blast furnace gas distributed energy resource system
CN103574587B (en) Waste heat utilizing system of thermal power plant and thermal power unit
CN101846459A (en) Method for recycling waste heat of flue gas of heating furnace and heating furnace system
CN203259026U (en) Efficient sintering ore waste heat recovery and electricity generation device with griddle
CN203431914U (en) Flue gas system using air pre-heater of quartered-sector structure to reduce exhaust gas temperature of secondary reheating boiler
CN104819054A (en) Distributed energy resource waste heat utilization system
CN102393148A (en) Cement kiln tail by-pass waste heat power generation device

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
GR01 Patent grant