CN104197730A - Sintering exhaust gas waste heat recycling system and method - Google Patents
Sintering exhaust gas waste heat recycling system and method Download PDFInfo
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- CN104197730A CN104197730A CN201410453474.1A CN201410453474A CN104197730A CN 104197730 A CN104197730 A CN 104197730A CN 201410453474 A CN201410453474 A CN 201410453474A CN 104197730 A CN104197730 A CN 104197730A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses a sintering exhaust gas waste heat recycling system. The sintering exhaust gas waste heat recycling system comprises an electric dust remover, a main exhaust fan, a water granulated slag grinding machine, a ground water granulated slag collector and an exhaust blower, wherein the electric dust remover is communicated with a sintering machine, the main exhaust fan is communicated with the electric dust remover, the water granulated slag grinding machine is communicated with an air outlet of the main exhaust fan through a first pipeline provided with a first stop valve, the ground water granulated slag collector is communicated with the water granulated slag grinding machine, and the exhaust blower is connected between the ground water granulated slag collector and a second chimney. The position, between the first stop valve and the main exhaust fan, of the first pipeline is communicated with a first chimney through a second pipeline provided with a second stop valve. A discharging outlet of the ground water granulated slag collector is communicated with a user collection container. Exhaust gas with heat, instead of exhaust gas generated by cold-blast air gas combustion, is utilized as a drying agent to enter the water granulated slag grinding machine to dry ground water granulated slag, so that energy is saved, the cost of fine grinding of water granulated slags is reduced, and air environmental pollution is reduced; in addition, the invention further discloses a sintering exhaust gas waste heat recycling method.
Description
Technical field
The present invention relates to waste gas residual heat recovery and utilization technology field, relate in particular to a kind of sintered discharge gas waste heat recycling system and method.
Background technology
Steel industry is the important foundation industry of national economy, and it has energy-intensive feature.China's iron and steel output ranks first in the world for many years, but the comprehensive energy consumption of steel industry also has gap compared with international most advanced level, and wherein sintering, blast furnace and steel making working procedure have suitable heat to fail to recycle.Along with the deep propelling of China's energy-saving and emission-reduction work, tune structure that steel and iron industry faces, to fall energy consumption pressure day by day huge.Industrial energy saving " 12 " planning requirement was compared with 2005 for 2010, and steel industry value added energy consumption declines respectively 23.4%, and ton steel comprehensive energy consumption declines 12.1%; Be recovered as emphasis with process optimization and secondary energy sources, strengthen the technological transformation dynamics that high efficiency of energy reclaims, changes and utilize, improve secondary energy sources level of comprehensive utilization; Emphasis is promoted the technology such as agglomerates of sintered pellets low temperature waste gas UTILIZATION OF VESIDUAL HEAT IN.Therefore, iron and steel enterprise is energy-saving and cost-reducing is the needs of enterprise development, is also the needs of environmental protection, national economy sustainable development is had to very important meaning simultaneously.Sintering is that in Production Process for Steel Enterprise, blast furnace mineral aggregate enters stove preparatory process in the past.According to statistics, the energy consumption of sintering circuit accounts for 12% of metallurgical total energy consumption, be the second largest power consumption operation that is only second to ironmaking, and the heat of its discharge accounts for 49% of total energy consumption heat energy, reclaims and utilize these heats, obviously very important.
At present, domestic sintering circuit adopts the method for continuous down draft sintering mostly, iron-bearing material, flux, fuel and grate-layer material etc. add water by a certain percentage mix after be laid on pallet, light a fire by negative pressure, under the effect of forced draft, compound is burnt from top to bottom, under the effect of high temperature, make compound generation physicochemical change, produce certain liquid phase, along with the reduction of mixture temperature, liquid phase is consolidated into piece to form sintering deposit by mineral powder granular, and produces the waste gas with certain heat.In prior art, conventionally make the waste gas that carries certain heat in electric cleaner, carry out, after dedusting, directly entering atmosphere by main exhauster, chimney, the heat of waste gas is not recovered utilization and just enters atmosphere, causes the waste of secondary energy sources.
In addition, the flue gas that grain slag fine grinding technology of the prior art adopts gas-fired to produce is conventionally dried grain slag powder as drier, the coal of this great deal of that need to burn.Therefore, this technique has caused energy consumption to a certain degree, has increased the production cost of grain slag powder.
Summary of the invention
The waste gas producing for sintering circuit directly enters atmosphere, and the technical problem of its heat not being recycled, the invention provides a kind of sintered discharge gas waste heat recycling system, the heat that uses this system can effective recycling sintered discharge gas to carry, thereby save the energy, reduced environmental pollution.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of sintered discharge gas waste heat recycling system, comprises the electric cleaner being communicated with the air outlet of sintering machine, the main exhauster being communicated with the air outlet of described electric cleaner, by the exhaust blower between the air outlet and the second chimney that are provided with grain slag grinding machine, the grain slag powder collector being communicated with the outlet of described grain slag grinding machine that the first pipeline of the first stop valve is communicated with the air outlet of described main exhauster, are connected to described grain slag powder collector; The first device for cleaning pipeline between described the first stop valve and described main exhauster is crossed the second pipe that is provided with the second stop valve and is communicated with the first chimney, and the discharging opening of described grain slag powder collector is communicated with user's collection container.
Preferably, described sintered discharge gas waste heat recycling system also comprises the heating furnace for heat exhaust gases; The air inlet of described heating furnace is by being provided with the 4th pipeline of the 4th stop valve and the first pipeline communication between described the first stop valve and described second pipe, and its air outlet is by being provided with the 6th pipeline of the 6th stop valve and the first pipeline communication between described the first stop valve and described grain slag grinding machine.
Preferably, on the first pipeline between described the 4th pipeline and the 6th pipeline, be provided with connect with described the first stop valve for controlling the first electric control valve of waste gas air quantity; On described the 4th pipeline, be provided with connect with described the 4th stop valve for controlling the second electric control valve of waste gas air quantity.
Preferably, also comprise heat exchanger; Described heat exchanger is by being provided with the 3rd pipeline of the 3rd stop valve and the first pipeline communication between described main exhauster and described the 4th pipeline, the air outlet of described heat exchanger is communicated with the 3rd chimney by the 5th pipeline, on described the 5th pipeline, is provided with the 5th stop valve.
The present invention provides a kind of sintered discharge gas heat recovery method being applied in said system simultaneously, concrete grammar is: the waste gas that sintering machine is produced enters electric cleaner and carries out dust removal process, making waste gas after dedusting enter grain slag grinding machine as drier through main exhauster mixes with grain slag powder and grain slag powder is dried, make grain slag powder and the mixture that forms of waste gas of drying enter grain slag powder collector, utilize grain slag powder collector that grain slag powder is leached from mixture, and utilize user's collection container to collect, waste gas is entered to the second chimney through exhaust blower simultaneously.
Preferably, if the temperature of waste gas, lower than 200 DEG C, before waste gas enters grain slag grinding machine, utilizes heating furnace to heat waste gas.
Preferably, waste gas is through main exhauster, and Part I enters grain slag grinding machine the grain slag powder in it is dried; Part II waste gas enters heat exchanger, and heat exchanger to store as the energy or directly application, and enters the 3rd chimney by the waste gas after heat exchange by heat absorption that waste gas is with; Remainder waste gas directly enters the first chimney.
Compared with prior art, the invention has the beneficial effects as follows:
1, because main exhauster is communicated with grain slag grinding machine, grain slag grinding machine is communicated with grain slag powder collector, the waste gas of being discharged by main exhauster carries certain heat and enters grain slag grinding machine, this waste gas that carries certain heat is dried the grain slag powder in grain slag grinding machine as drier, thereby the flue gas that has replaced cold wind gas-fired to produce is dried grain slag powder as drier.Because coal combustion can cause environmental pollution to a certain degree.Therefore, adopt sintered discharge gas recycling system of the present invention and method both to save the energy, reduced grain slag fine grinding cost, reduced again air environmental pollution.
2, because grain slag powder fully mixes in grain slag grinding machine with waste gas, grain slag powder has suction-operated to pernicious gases such as the sulfur dioxide in waste gas, therefore, has reduced the content of pernicious gas in waste gas, thereby has also reduced environmental pollution.
Brief description of the drawings
The schematic flow sheet of a kind of sintered discharge gas waste heat recycling system that Fig. 1 provides for embodiments of the invention one;
The schematic flow sheet of a kind of sintered discharge gas waste heat recycling system that Fig. 2 provides for embodiments of the invention two;
The schematic flow sheet of a kind of sintered discharge gas waste heat recycling system that Fig. 3 provides for embodiments of the invention three.
Detailed description of the invention
For making those skilled in the art better understand technical scheme of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is elaborated.
Embodiment mono-
As shown in Figure 1, a kind of sintered discharge gas waste heat recycling system that embodiment mono-provides, comprising: the electric cleaner 2 being communicated with the air outlet of sintering machine 1, the main exhauster 3 being communicated with the air outlet of electric cleaner 2, the grain slag grinding machine 4 being communicated with the air outlet of main exhauster 3 by the first pipeline 9, the exhaust blower 7 for collecting the grain slag powder collector 6 of grain slag powder, being communicated with the air outlet of grain slag powder collector 6 being communicated with the outlet of grain slag grinding machine 4; The air outlet of exhaust blower 7 is communicated with the second chimney 82, on the first pipeline 9, be provided with the first stop valve 11 for controlling the first pipeline 9 break-makes, the first pipeline 9 between the first stop valve 11 and main exhauster 3 is communicated with the first chimney 81 by second pipe 10, on second pipe 10, be provided with the second stop valve 12 for controlling second pipe 10 break-makes, the discharging opening of grain slag powder collector 6 is communicated with user's collection container 5.
Utilize the method that system that embodiment mono-provides is recycled the waste heat of sintered discharge gas to be: the waste gas that sintering machine 1 is produced enters electric cleaner 2 and carries out dust removal process, making waste gas after dedusting enter grain slag grinding machine 4 as drier through main exhauster 3 mixes with grain slag powder and grain slag powder is dried, make grain slag powder and the mixture that waste gas forms of drying enter grain slag powder collector 6, utilize grain slag powder collector 6 that grain slag powder is leached from mixture, and utilize user's collection container 5 to collect, waste gas is entered to the second chimney 82 through exhaust blower 7 simultaneously.
The concrete operations flow process that the sintered discharge gas waste heat recycling system that embodiment mono-provides is recycled waste gas is: close the second stop valve 12, open the first stop valve 11, the waste gas that sintering machine 1 produces enters electric cleaner 2 by the air outlet of sintering machine 1 and carries out dust removal process, enter main exhauster 3 by the air outlet of electric cleaner 2 again, discharge by the air outlet of main exhauster 3 again, the waste gas of discharging enters grain slag grinding machine 4, and mix and grain slag powder is dried with the grain slag powder in grain slag grinding machine 4 as drier, the mixture that grain slag powder after oven dry and waste gas form enters grain slag powder collector 6 by the outlet of grain slag grinding machine 4, grain slag powder collector 6 leaches grain slag powder from mixture, the grain slag powder leaching is collected by the user's collection container 5 being communicated with the discharging opening of grain slag powder collector 6, waste gas enters exhaust blower 7 by the air outlet of grain slag powder collector 6, and enter the second chimney 82 by the air outlet of exhaust blower 7.
Because main exhauster 3 is communicated with grain slag grinding machine 4, grain slag grinding machine 4 is communicated with grain slag powder collector, the waste gas of being discharged by main exhauster 3 carries certain heat and enters grain slag grinding machine 4, this waste gas that carries certain heat mixes and grain slag powder is dried with the grain slag powder in grain slag grinding machine 4 as drier, compared with the method that the flue gas producing with gas-fired is dried grain slag powder as drier, adopt sintered discharge gas recycling system of the present invention and method both to save the energy, reduce grain slag fine grinding cost, reduce again environmental pollution.
Taking the gas flow of waste gas that enters grain slag grinding machine 4 as 2000m
3/ min, temperature are to calculate by 259 days for 130 DEG C, 1 year, and the entrained heat total value of waste gas that enters grain slag grinding machine 4 in a year can reach 2.35 × 10
11kJ, is equivalent to the heat that 0.805 ten thousand ton of mark coal produces, and therefore, has saved the energy.By burning mark coal discharge per ton flue gas 14293m
3(mark state), discharge flue dust 42.8kg, discharge SO
214.9kg calculates, and can reduce every year smoke discharge amount 1.15 × 10
8m
3(mark state), reduces smoke discharge amount 3.45 × 10
5kg, reduces SO
2discharge 1.2 × 10
5kg.Therefore, sintered discharge gas waste heat recycling system of the present invention and method have reduced environmental pollution to a certain extent.
In addition,, because grain slag powder fully mixes with waste gas, grain slag powder has suction-operated to pernicious gases such as the sulfur dioxide in waste gas, therefore, has reduced the content of pernicious gas in waste gas, thereby has directly reduced the pollution of waste gas to environment.
Embodiment bis-
As shown in Figure 2, a kind of sintered discharge gas waste heat recycling system that embodiment bis-provides, comprising: the electric cleaner 2 being communicated with the air outlet of sintering machine 1, the main exhauster 3 being communicated with the air outlet of electric cleaner 2, the grain slag grinding machine 4 being communicated with the air outlet of main exhauster 3 by the first pipeline 9, be communicated with the outlet of grain slag grinding machine 4 for the exhaust blower 7 of collecting the grain slag powder collector 6 of grain slag powder, be communicated with the air outlet of grain slag powder collector 6 and for the heating furnace 15 of heat exhaust gases; The air outlet of exhaust blower 7 is communicated with the second chimney 82.On the first pipeline 9, be provided with the first stop valve 11 for controlling the first pipeline 9 break-makes, the first pipeline 9 between the first stop valve 11 and main exhauster 3 is communicated with the first chimney 81 by second pipe 10, on second pipe 10, be provided with the second stop valve 12 for controlling second pipe 10 break-makes, the discharging opening of grain slag powder collector 6 is communicated with user's collection container 5; The air inlet of heating furnace 15 is communicated with the first pipeline 9 between the first stop valve 11 and second pipe 10 by being provided with the 4th pipeline of the 4th stop valve 16, and its air outlet is by being provided with the 6th pipeline of the 6th stop valve 21 and the first pipeline communication 9 between the first stop valve 11 and grain slag grinding machine 4.On the first pipeline 9 between the 4th pipeline and the 6th pipeline, be provided with connect with the first stop valve 11 for controlling the first electric control valve 13 of waste gas air quantity; On the 4th pipeline, be provided with connect with the 4th stop valve 16 for controlling the second electric control valve 14 of waste gas air quantity.
Utilize the method that system that embodiment bis-provides is recycled the waste heat of sintered discharge gas to be: if the temperature of the waste gas of being discharged by main exhauster 3 higher than 200 DEG C, the method for the heat recovery to waste gas is identical with the method in embodiment mono-; If the temperature of waste gas is lower than 200 DEG C, utilize heating furnace 15 to heat and make it reach the temperature needing this waste gas, waste gas after heating furnace 15 heating enters grain slag grinding machine 4 to be mixed and grain slag powder is dried with the grain slag powder in it, make grain slag powder and the mixture that forms of waste gas of drying enter grain slag powder collector 6, utilize grain slag powder collector 6 that grain slag powder is leached from mixture, and utilize user's collection container 5 to collect, waste gas is entered to the second chimney 82 through exhaust blower 7.
The concrete operations flow process that the sintered discharge gas waste heat recycling system that embodiment bis-provides is recycled waste gas is: if the temperature of the waste gas of being discharged by main exhauster 3 higher than 200 DEG C, the concrete operations flow process of the heat recovery to waste gas is identical with the operating process in embodiment mono-, if the temperature of this waste gas is lower than 200 DEG C, its concrete operations flow process is: close the first stop valve 11, the second stop valve 12, open the 4th stop valve 16, the 6th stop valve 21, the waste gas that sintering machine 1 produces enters electric cleaner 2 by the air outlet of sintering machine 1 and carries out dust removal process, enter main exhauster 3 by the air outlet of electric cleaner 2 again, the waste gas (lower than 200 DEG C) that enters main exhauster 3 is discharged through its air outlet, the waste gas of discharging is through the first pipeline 9, enter the 4th pipeline, and carry out air quantity adjusting by the second electric control valve 14 on the 4th pipeline, waste gas after adjusting enters grain slag grinding machine 4 after heating furnace 15 heating, and mix and grain slag powder is dried with the grain slag powder in grain slag grinding machine 4 as drier, the mixture that grain slag powder after oven dry and waste gas form enters grain slag powder collector 6 by the outlet of grain slag grinding machine 4, grain slag powder collector 6 leaches grain slag powder from waste gas, the grain slag powder leaching is collected by the user's collection container 5 being communicated with the discharging opening of grain slag powder collector 6, waste gas enters exhaust blower 7 by the air outlet of grain slag powder collector 6, and enter the second chimney 82 by the air outlet of exhaust blower 7.
Embodiment bis-is with the main distinction of embodiment mono-, has set up heating furnace 15, the first electric control valve 13 and the second electric control valve 14.The object of setting up heating furnace 15 is as preventing because EGT is long to the grain slag powder drying time in grain slag grinding machine 4 lower than 200 DEG C, raises and can accelerate the drying rate of grain slag powder through heating furnace 15 temperature after heating lower than the waste gas of 200 DEG C; The object of setting up the first electric control valve 13 and the second electric control valve 14 be can real-time quantitative the air quantity that directly enters grain slag grinding machine 4 or indirectly first enter again the waste gas of grain slag grinding machine 4 through heating furnace 15 is regulated.Embodiment tri-
As shown in Figure 3, a kind of sintered discharge gas waste heat recycling system that embodiment tri-provides, comprising: the electric cleaner 2 being communicated with the air outlet of sintering machine 1, the main exhauster 3 being communicated with the air outlet of electric cleaner 2, the grain slag grinding machine 4 being communicated with the air outlet of main exhauster 3 by the first pipeline 9, be communicated with the outlet of grain slag grinding machine 4 for the exhaust blower 7 of collecting the grain slag powder collector 6 of grain slag powder, be communicated with the air outlet of grain slag powder collector 6, for the heating furnace 15 of heat exhaust gases and for the heat exchanger 19 of waste gas heat exchange; The air outlet of exhaust blower 7 is communicated with the second chimney 82, on the first pipeline 9, be provided with the first stop valve 11 for controlling the first pipeline 9 break-makes, the first pipeline 9 between the first stop valve 11 and main exhauster 3 is communicated with the first chimney 81 by second pipe 10, on second pipe 10, be provided with the second stop valve 12 for controlling second pipe 10 break-makes, the discharging opening of grain slag powder collector 6 is communicated with user's collection container 5; The air inlet of heating furnace 15 is communicated with the first pipeline 9 between the first stop valve 11 and second pipe 10 by being provided with the 4th pipeline of the 4th stop valve 16, and its air outlet is by being provided with the 6th pipeline of the 6th stop valve 21 and the first pipeline communication 9 between the first stop valve 11 and grain slag grinding machine 4.On the first pipeline 9 between the 4th pipeline and the 6th pipeline, be provided with connect with the first stop valve 11 for controlling the first electric control valve 13 of waste gas air quantity; On the 4th pipeline, be provided with connect with the 4th stop valve 16 for controlling the second electric control valve 14 of waste gas air quantity; Heat exchanger 19 is communicated with the first pipeline 9 between main exhauster 3 and the 4th pipeline by being provided with the 3rd pipeline 17 of the 3rd stop valve 18, the air outlet of heat exchanger 19 is communicated with the 3rd chimney 83 by the 5th pipeline, is provided with the 5th stop valve 20 on the 5th pipeline.
Utilize the method that system that embodiment tri-provides is recycled the waste heat of sintered discharge gas to be: waste gas is through main exhauster 3, part waste gas enters grain slag grinding machine 4 to be mixed and grain slag powder is dried with the grain slag powder in it, make grain slag powder and the mixture that forms of waste gas of drying enter grain slag powder collector 6, utilize grain slag powder collector 6 that grain slag powder is leached from mixture, and utilize user's collection container 5 to collect, waste gas is entered to the second chimney 82 through exhaust blower 7; Another part waste gas enters heat exchanger 19, and heat exchanger 19 to store as the energy or directly application, and enters the 3rd chimney 83 by the waste gas after heat exchange by heat absorption that waste gas is with; Remainder of exhaust gas directly enters the first chimney 81; If the temperature of the waste gas of discharging from main exhauster 3, can be before waste gas enters grain slag grinding machine 4 lower than 200 DEG C, utilize heating furnace 15 to heat waste gas.
The concrete operations flow process that the sintered discharge gas waste heat recycling system that embodiment tri-provides is recycled waste gas is: if the temperature of waste gas is higher than 200 DEG C, close the 4th stop valve 16, the 6th stop valve 21, open the first stop valve 11, the 3rd stop valve 18, the 5th stop valve 20, and make the first stop valve 12 keep certain aperture, the waste gas that sintering machine 1 produces enters electric cleaner 2 by the air outlet of sintering machine 1 and carries out dust removal process, enter main exhauster 3 by the air outlet of electric cleaner 2 again, the Part I entering in the waste gas of main exhauster 3 carries out air quantity adjusting by the first electric control valve 13 on the first pipeline 9, waste gas after adjusting enters grain slag grinding machine 4, and mix and grain slag powder is dried with the grain slag powder in grain slag grinding machine 4 as drier, the mixture that grain slag powder after oven dry and waste gas form enters grain slag powder collector 6 by the outlet of grain slag grinding machine 4, grain slag powder collector 6 leaches grain slag powder from waste gas, the grain slag powder leaching is collected by the user's collection container 5 being communicated with the discharging opening of grain slag powder collector 6, waste gas enters exhaust blower 7 by the outlet of grain slag powder collector 6, and enter the second chimney 82 by the air outlet of exhaust blower 7, the Part II waste gas that enters main exhauster 3 enters heat exchanger 19 by the 3rd pipeline 17, and heat exchanger 19 is by heat absorption that waste gas is with using as energy storage, and the waste gas after heat exchange enters the 3rd chimney 83 by the air outlet of heat exchanger 19, the remaining waste gas that enters main exhauster 3 enters the first chimney 81 by second pipe 10.If the temperature of waste gas is lower than 200 DEG C, need close the first stop valve 13, and open the 4th stop valve 16 and the 6th stop valve 21, make Part I waste gas (lower than 200 DEG C) enter again grain slag grinding machine 4 after the second electric control valve 14 carries out air quantity adjusting and heater via 15 heating.
Embodiment tri-is to have set up heat exchanger 19 with the main distinction of embodiment bis-, the effect of this heat exchanger 19 is to dry the required exhausted air quantity of grain slag powder if the exhausted air quantity of discharging from main exhauster 3 is greater than, by remaining exhaust gas utilization heat exchanger 19 to the heat of waste gas absorb using as energy storage or directly application, for example, heat exchanger 19 is directly by carrying out heat exchange to realize shower, heating etc. with water.
Claims (7)
1. a sintered discharge gas waste heat recycling system, it is characterized in that, comprise the electric cleaner being communicated with the air outlet of sintering machine, the main exhauster being communicated with the air outlet of described electric cleaner, by the exhaust blower between the air outlet and the second chimney that are provided with grain slag grinding machine, the grain slag powder collector being communicated with the outlet of described grain slag grinding machine that the first pipeline of the first stop valve is communicated with the air outlet of described main exhauster, are connected to described grain slag powder collector; The first device for cleaning pipeline between described the first stop valve and described main exhauster is crossed the second pipe that is provided with the second stop valve and is communicated with the first chimney, and the discharging opening of described grain slag powder collector is communicated with user's collection container.
2. sintered discharge gas waste heat recycling system according to claim 1, is characterized in that, also comprises the heating furnace for heat exhaust gases; The air inlet of described heating furnace is by being provided with the 4th pipeline of the 4th stop valve and the first pipeline communication between described the first stop valve and described second pipe, and its air outlet is by being provided with the 6th pipeline of the 6th stop valve and the first pipeline communication between described the first stop valve and described grain slag grinding machine.
3. sintered discharge gas waste heat recycling system according to claim 2, is characterized in that, on the first pipeline between described the 4th pipeline and the 6th pipeline, be provided with connect with described the first stop valve for controlling the first electric control valve of waste gas air quantity; On described the 4th pipeline, be provided with connect with described the 4th stop valve for controlling the second electric control valve of waste gas air quantity.
4. sintered discharge gas waste heat recycling system according to claim 3, is characterized in that, also comprises heat exchanger; Described heat exchanger is by being provided with the 3rd pipeline of the 3rd stop valve and the first pipeline communication between described main exhauster and described the 4th pipeline, the air outlet of described heat exchanger is communicated with the 3rd chimney by the 5th pipeline, on described the 5th pipeline, is provided with the 5th stop valve.
5. one kind is utilized the sintered discharge gas waste heat recycling system described in any one in claim 1 to 4 to carry out sintered discharge gas heat recovery method, it is characterized in that, the waste gas that sintering machine is produced enters electric cleaner and carries out dust removal process, making waste gas after dedusting enter grain slag grinding machine as drier through main exhauster mixes with grain slag powder and grain slag powder is dried, make grain slag powder and the mixture that forms of waste gas of drying enter grain slag powder collector, utilize grain slag powder collector that grain slag powder is leached from mixture, and utilize user's collection container to collect, waste gas is entered to the second chimney through exhaust blower simultaneously.
6. sintered discharge gas heat recovery method according to claim 5, is characterized in that, if the temperature of waste gas, lower than 200 DEG C, before waste gas enters grain slag grinding machine, utilizes heating furnace to heat waste gas.
7. sintered discharge gas heat recovery method according to claim 5, is characterized in that, waste gas is through main exhauster, and Part I enters grain slag grinding machine the grain slag powder in it is dried; Part II waste gas enters heat exchanger, and heat exchanger to store as the energy or directly application, and enters the 3rd chimney by the waste gas after heat exchange by heat absorption that waste gas is with; Remainder waste gas directly enters the first chimney.
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