CN203824347U - Efficient smoke waste heat recycling system of sintering machine - Google Patents
Efficient smoke waste heat recycling system of sintering machine Download PDFInfo
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- CN203824347U CN203824347U CN201420227538.1U CN201420227538U CN203824347U CN 203824347 U CN203824347 U CN 203824347U CN 201420227538 U CN201420227538 U CN 201420227538U CN 203824347 U CN203824347 U CN 203824347U
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- China
- Prior art keywords
- sintering
- waste heat
- temperature
- smoke
- sintering machine
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- 238000005245 sintering Methods 0.000 title claims abstract description 77
- 239000002918 waste heat Substances 0.000 title claims abstract description 32
- 239000000779 smoke Substances 0.000 title claims abstract description 15
- 238000004064 recycling Methods 0.000 title abstract description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000007789 gas Substances 0.000 claims abstract description 10
- 239000003546 flue gas Substances 0.000 claims description 42
- 239000000428 dust Substances 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 10
- 239000002912 waste gas Substances 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 7
- 239000012717 electrostatic precipitator Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 8
- 229910002091 carbon monoxide Inorganic materials 0.000 abstract description 7
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 125000004122 cyclic group Chemical group 0.000 abstract 2
- 238000005265 energy consumption Methods 0.000 description 8
- 238000011084 recovery Methods 0.000 description 7
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 239000003517 fume Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
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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
-
- 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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model provides an efficient smoke waste heat recycling system of a sintering machine, and belongs to the technical field of sintering waste heat recycling in iron and steel plants. The system comprises a sintering machine gas cyclic utilization system and a sintering machine exhaust gas waste heat utilizing system, a sintering smoke cyclic system is finished through one high-temperature draught fan and is used for recycling the waste heat of the smoke at the low-temperature section on the front portion of the sintering machine and carbon monoxide not completely combusted in the smoke, the waste heat of the high-temperature exhaust smoke at the tail of the sintering machine is recycled through one main waste heat exhausting boiler of the sintering machine, a high-temperature electric butterfly valve is arranged between the high-temperature section of a large flue at the tail of the sintering machine and the low-temperature section of the large flue at the tail of the sintering machine, and the low-temperature smoke and the high-temperature smoke are prevented from being directly mixed so that the smoke air fetching speed cannot be lowered; the high-temperature smoke enters the main waste heat exhausting boiler so that waste heat can be recycled. By means of the efficient smoke waste heat recycling system, the waste heat recycling efficiency of the sintering technology is effectively improved, and resources are reasonably and efficiently utilized in the sintering process.
Description
Technical field
The utility model relates to the high efficiente callback of a kind of sintering device flue gas waste heat and utilizes system and method thereof, belongs to steel works sintering cogeneration technology field.
Background technology
Therefore iron and steel directly has influence on ten thousand yuan of GDP energy consumptions of China as its energy consumption of foundation stone of national product, energy-conservation particularly important in steel manufacture process.According to investigations, ironmaking system accounts for iron and steel and produces 69.41% of total energy consumption, and wherein sintering circuit energy consumption accounts for the 9-12% of whole iron and steel enterprise total energy consumption, is only second to Iron-smelting.Sintering process residual heat resources mainly contain two large divisions: the one, and crimson sintering mine sensible heat in sintering process, is about 350-420 ℃ at cooler high temperature section EGT; The 2nd, sinter fume sensible heat in sintering process, the EGT of discharging in sintering machine tail bellows high temperature section is 300-380 ℃.In sintering production process, the heat energy that has 50% left and right enters atmosphere with the sensible heat form of sinter fume and cooling machine waste gas.It is reported, at present China's sintering circuit heat recovery rate is not high, the energy consumption average of China's sintering circuit and advanced foreign technology level ratio in addition, and energy consumption is high by 7.2%.Therefore reduce energy consumption in sintering process and have very large space.
Along with the research of people to sintered, energy saving technology, some patented technologies are developed.In Chinese patent " the residual heat combined recovery electricity generation system of sintering device flue gas and cooling machine waste gas and method " (patent No. ZL201010523625.8), sintering device flue gas and the residual heat combined recovery electricity generation system of cooling machine waste gas are disclosed, it adopts two pressure waste heat boilers to reclaim in the generation of central cooler waste gas residual heat and presses main steam and low pressure filling, a single-pressure HGSR reclaims sintering machine large flue high temperature section flue gas and produces the middle pressure main steam identical with the cold waste heat boiler parameter of ring, adopts condensing filling formula Turbo-generator Set acting generating.Although the method has been recycled the residual heat resources in sintering circuit to a certain extent, the anterior low-temperature flue gas sensible heat of sintering machine and imperfect combustion carbon monoxide are not utilized, cause the utilization of sintering device flue gas residual heat resources abundant not.
Summary of the invention
The purpose of this utility model is, for current operation with in most of sintering process UTILIZATION OF VESIDUAL HEAT IN engineering of building, only reclaim sintering machine afterbody high temperature section fume afterheat, and the anterior thermal source of sintering machine is not paid attention to and utilized, this part resource is wasted, thereby the efficiency that has caused sintering waste heat to utilize is not high, and therefore proposing the high efficiente callback of a kind of sintering device flue gas waste heat utilizes system.
For achieving the above object, the utility model adopts following technical scheme:
The high efficiente callback of a kind of sintering device flue gas waste heat utilizes system, comprise sintering device flue gas cyclic utilization system and fritting machine waste gas bootstrap system, described sintering device flue gas cyclic utilization system, comprise middle temperature air-introduced machine and multi-tube dust cleaner, the smoke inlet of described middle temperature air-introduced machine is connected with the outlet of multi-tube dust cleaner, the exhanst gas outlet of described middle temperature air-introduced machine is connected with circulation petticoat pipe, and described multi-tube dust cleaner import is connected with plenum chamber, and described plenum chamber is connected with the anterior bellows down-comer of sintering machine; Described fritting machine waste gas bootstrap system, comprise a main exhaust heat boiler, between the anterior low-temperature zone of the exhanst gas outlet of described main exhaust heat boiler and the large flue of sintering machine, by air-introduced machine, be connected, a high temperature electric butterfly valve is set between the large flue afterbody high temperature section of described sintering machine and anterior low-temperature zone, the outlet of described large flue is connected with the entrance of electrostatic precipitator, the outlet of described electrostatic precipitator is connected with the entrance of main exhauster, and the outlet of described main exhauster is communicated with diffusing chimney.
Described main exhaust heat boiler adopts single therrmodynamic system of pressing, and inside is provided with economizer, evaporimeter and superheater.
Further, superheater in described main exhaust heat boiler is also connected with steam turbine, steam turbine one road is connected to generator, another road is connected with condenser, condensate pump, oxygen-eliminating device, boiler feed pump successively, boiler feed pump is connected to the economizer in main exhaust heat boiler, and wherein condenser and cooling water circulation water pump and cooling tower form a closed circuit.
Compare with conventional sintering waste heat generating system, superiority of the present utility model is embodied in: (1) has effectively utilized the anterior obvious heat of smoke of sintering machine and imperfect combustion carbon monoxide resource, improved the temperature of afterbody high-temperature flue gas and then increased exerting oneself of boiler, recycling afterbody high-temperature flue gas carries out heat recovery, thereby improved the heat recovery efficiency of sintering process, realized resource in sintering process and rationally utilized efficiently; (2) by the anterior flue gas recirculation of sintering machine, utilize system, reduced the power of large flue main exhauster, realized industrial electric power energy-saving.
Accompanying drawing explanation
Fig. 1 is the conventional electricity generation system that only reclaims sintering waste heat.
Fig. 2 is that a kind of sintering device flue gas waste heat of the present utility model high efficiente callback utilizes system.In figure except the word of having indicated, 1-sintering machine; 2-bellows down-comer; 3-circulation petticoat pipe; 4-plenum chamber; 5-cold blast sliding valve; 6-multi-tube dust cleaner; Warm air-introduced machine in 7-; 8-large flue; The main exhaust heat boiler of 9-; 10-evaporimeter; 11-superheater; 12-drum; 13-economizer; 14-air-introduced machine; 15-high temperature electric butterfly valve; 16-boiler feed pump; 17-vacuum dust cather; 18-electrostatic precipitator; 19-main exhauster; 20-diffusing chimney.
Fig. 3 is that a kind of sintering device flue gas waste heat of the present utility model high efficiente callback utilizes another embodiment of system.In figure except the word of having indicated, 21-steam turbine; 22-generator; 23-condenser; 24-condensate pump; 25-cooling water circulation water pump; 26-cooling tower.
The specific embodiment
Below in conjunction with drawings and Examples, be described further.
Embodiment one: as shown in Figure 2, a kind of sintering device flue gas waste heat of the present utility model high efficiente callback utilizes system, utilize the gas that in one, warm air-introduced machine 7 contains carbon monoxide the anterior bellows of sintering machine to be transported to the utilization of sintering machine afterbody, middle temperature air-introduced machine 7 smoke inlets are connected with multi-tube dust cleaner 6 outlets, the low-temperature flue gas that contains carbon monoxide in multi-tube dust cleaner 6 after udst separation by warm air-introduced machine 7 be transported in circulation petticoat pipe, multi-tube dust cleaner 6 is connected with plenum chamber 4, plenum chamber 4 and anterior bellows down-comer 2 UNICOMs.
Utilize a sintering machine main exhaust heat boiler 9 to reclaim sintering afterbody high-temperature flue gas waste heat, the cigarette wind inlet of waste heat boiler 9 is connected with large flue 8 afterbodys, waste heat boiler 9 exhanst gas outlets are sent the low-temperature zone position of large flue 8 back to by air-introduced machine 14, the superheated steam of the superheater 11 outlet outputs of waste heat boiler 9 is used as product heat supply user.
Concrete technology flow process: by warm air-introduced machine 7 in, imperfect combustion carbon monoxide under low temperature flue gas is contained in sintering machine 1 front portion and send in circulation petticoat pipe for sintering machine 1 afterbody sintering, and the flue gas utilizing purifies in multi-tube dust cleaner 6, it is the suitable cold blast sliding valve 5 on ON cycle flue of the temperature of adjusting flue gas, by low temperature, contain recycling of CO gas, improve the temperature of sintering machine 1 afterbody bellows, recycling sintering machine main exhaust heat boiler 9 carries out waste heat recovery, interior by tail high-temperature flue gas and anterior low-temperature flue gas high temperature electric butterfly valve 15 partitions at sintering machine 1 large flue 8, high-temperature flue gas enters in main exhaust heat boiler 9, pass through successively superheater, evaporimeter and economizer carry out heat exchange and by an air-introduced machine 14, send large flue 8 back to after cooling and mix with low-temperature flue gas wherein, to guarantee that flue-gas temperature in large flue 8 is on dew-point temperature, in order to avoid the corrosion of the sulfur dioxide in flue gas to equipment.The superheated steam heat supply user of main exhaust heat boiler 9 outputs is used.
Embodiment two: as shown in Figure 3, increase other accessory systems such as a set of turbine generating system, recirculating cooling water system on the basis of embodiment one.The object of embodiment two is that the superheated steam in embodiment one is used for generating electricity.
Concrete technology flow process: by warm air-introduced machine 7 in, imperfect combustion carbon monoxide under low temperature flue gas is contained in sintering machine 1 front portion and send in circulation petticoat pipe for sintering machine 1 afterbody sintering, and the flue gas utilizing purifies in multi-tube dust cleaner 6, it is the suitable cold blast sliding valve 5 on ON cycle flue of the temperature of adjusting flue gas, by low temperature, contain recycling of CO gas, improve the temperature of sintering machine 1 afterbody bellows, recycling sintering machine main exhaust heat boiler 9 carries out waste heat recovery, interior by tail high-temperature flue gas and anterior low-temperature flue gas high temperature electric butterfly valve 15 partitions at sintering machine 1 large flue 8, high-temperature flue gas enters in main exhaust heat boiler 9, pass through successively superheater, evaporimeter and economizer carry out heat exchange and by an air-introduced machine 14, send large flue 8 back to after cooling and mix with low-temperature flue gas wherein, to guarantee that flue-gas temperature in large flue 8 is on dew-point temperature, in order to avoid the corrosion of the sulfur dioxide in flue gas to equipment.The superheated steam of main exhaust heat boiler 9 outputs, deliver to the main inlet throttle-stop valve of steam turbine 21, Steam Actuation steam turbine 21 does work and drives after generator 22 generatings, exhaust steam is condensed into water through condenser 23, by condensate pump 24, delivered to after vacuum dust cather 17 deoxygenations again, by boiler feed pump 16, deliver to economizer 13 heating of sintering machine main exhaust heat boiler 9, after heating, deliver in drum 12, form a complete closed circuit.Wherein cooling water is delivered to heat exchange in condenser 23 by cooling water circulation water pump 25, the cooling water after heat exchange send into again in cooling tower 26, carry out cooling, thereby form a closed circuit.
Claims (3)
1. the high efficiente callback of sintering device flue gas waste heat utilizes a system, comprises sintering device flue gas cyclic utilization system and fritting machine waste gas bootstrap system, it is characterized in that:
Described sintering device flue gas cyclic utilization system, comprise middle temperature air-introduced machine (7) and multi-tube dust cleaner (6), the smoke inlet of described middle temperature air-introduced machine (7) is connected with the outlet of multi-tube dust cleaner (6), the exhanst gas outlet of described middle temperature air-introduced machine (7) is connected with circulation petticoat pipe (3), described multi-tube dust cleaner (6) import is connected with plenum chamber (4), and described plenum chamber (4) is connected with the anterior bellows down-comer of sintering machine (1) (2);
Described fritting machine waste gas bootstrap system, comprise a main exhaust heat boiler (9), between the anterior low-temperature zone of the exhanst gas outlet of described main exhaust heat boiler (9) and the large flue (8) of sintering machine (1), by air-introduced machine (14), be connected, between large flue (8) the afterbody high temperature section of described sintering machine (1) and anterior low-temperature zone, a high temperature electric butterfly valve (15) is set, the outlet of described large flue (8) is connected with the entrance of electrostatic precipitator (18), the outlet of described electrostatic precipitator (18) is connected with the entrance of main exhauster (19), the outlet of described main exhauster (19) is communicated with diffusing chimney (20).
2. a kind of sintering device flue gas waste heat according to claim 1 high efficiente callback utilizes system, it is characterized in that: described main exhaust heat boiler (9) adopts single therrmodynamic system of pressing, and inside is provided with economizer (13), evaporimeter (10) and superheater (11).
3. a kind of sintering device flue gas waste heat according to claim 2 high efficiente callback utilizes system, it is characterized in that: the superheater (11) in described main exhaust heat boiler (9) is also connected with steam turbine (21), steam turbine (21) one roads are connected to generator (22), another road successively with condenser (23), condensate pump (24), oxygen-eliminating device (17), boiler feed pump (16) connects, boiler feed pump (16) is connected to the economizer (13) in main exhaust heat boiler (9), wherein condenser (23) forms a closed circuit with cooling water circulation water pump (25) and cooling tower (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420227538.1U CN203824347U (en) | 2014-05-05 | 2014-05-05 | Efficient smoke waste heat recycling system of sintering machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420227538.1U CN203824347U (en) | 2014-05-05 | 2014-05-05 | Efficient smoke waste heat recycling system of sintering machine |
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| CN203824347U true CN203824347U (en) | 2014-09-10 |
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| CN201420227538.1U Expired - Lifetime CN203824347U (en) | 2014-05-05 | 2014-05-05 | Efficient smoke waste heat recycling system of sintering machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925808A (en) * | 2014-05-05 | 2014-07-16 | 南京凯盛开能环保能源有限公司 | Smoke waste heat efficient recycling system and method of sintering machine |
| CN104501608A (en) * | 2014-11-17 | 2015-04-08 | 北京中冶设备研究设计总院有限公司 | Equipment and method for superheating saturated steam of heating furnace by waste heat of large sintering flue |
| CN107941028A (en) * | 2017-12-06 | 2018-04-20 | 中国科学技术大学 | Sintering cooling power generation system using waste heat with organic Rankine bottoming cycle |
-
2014
- 2014-05-05 CN CN201420227538.1U patent/CN203824347U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925808A (en) * | 2014-05-05 | 2014-07-16 | 南京凯盛开能环保能源有限公司 | Smoke waste heat efficient recycling system and method of sintering machine |
| CN104501608A (en) * | 2014-11-17 | 2015-04-08 | 北京中冶设备研究设计总院有限公司 | Equipment and method for superheating saturated steam of heating furnace by waste heat of large sintering flue |
| CN104501608B (en) * | 2014-11-17 | 2016-05-25 | 北京中冶设备研究设计总院有限公司 | The device and method of the overheated heating furnace saturated vapor of a kind of sintering large flue waste heat |
| CN107941028A (en) * | 2017-12-06 | 2018-04-20 | 中国科学技术大学 | Sintering cooling power generation system using waste heat with organic Rankine bottoming cycle |
| CN107941028B (en) * | 2017-12-06 | 2023-08-29 | 中国科学技术大学 | Sintering cooling waste gas waste heat power generation system with organic Rankine cycle |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140910 |