CN209838488U - Vertical sintering waste heat driven steam and organic Rankine cycle series system - Google Patents
Vertical sintering waste heat driven steam and organic Rankine cycle series system Download PDFInfo
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- CN209838488U CN209838488U CN201822264773.7U CN201822264773U CN209838488U CN 209838488 U CN209838488 U CN 209838488U CN 201822264773 U CN201822264773 U CN 201822264773U CN 209838488 U CN209838488 U CN 209838488U
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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
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Abstract
The utility model discloses a vertical sintering waste heat drive steam and organic Rankine cycle series system, aiming at the current situation that the low-temperature waste heat resource after the vertical spiral countercurrent waste heat recovery steam Rankine cycle power generation can not be used for power generation, through introducing an organic Rankine cycle power generation system, the low-temperature waste gas after the steam Rankine cycle power generation of a vertical (spiral) countercurrent cooling device for sintering ore is used for the organic Rankine cycle power generation system; and the waste heat resource of the sintering flue gas is combined with the low-temperature waste gas generated by the sintering ore vertical spiral countercurrent cooling device after water vapor Rankine cycle power generation, and the combined waste heat resource is used for an organic Rankine cycle power generation system. The utility model discloses be applied to the electricity generation with the waste heat resource in the sintering process furthest, increase the self-service power supply volume of iron and steel enterprise, realize sintering process energy saving and consumption reduction, improve iron and steel enterprise's economic benefits.
Description
Technical Field
The utility model relates to a high temperature granule waste heat recovery power generation facility and technical field more exactly relate to a vertical sintering waste heat drive steam and organic rankine cycle series system.
Background
The high-efficiency recovery and conversion utilization of waste heat and residual pressure resources in the steel industry are one of the main directions of energy conservation and consumption reduction of enterprises. For the second or third sintering process of the energy-consuming place in the steel industry, the sintering waste heat mainly comprises two parts: the sensible heat of the sintering ore at the tail part of the sintering machine is 800-950 ℃, and accounts for 44.5 percent of the energy consumption of the sintering process; the sensible heat of the flue gas discharged by the sintering machine is 150-200 ℃ at average temperature, and accounts for 23.6% of the energy consumption of the sintering process. Comprehensive analysis of waste heat quality and quantity shows that the sensible heat of sintering ore accounts for 65% and the sensible heat of sintering flue gas accounts for about 35%. The sensible heat recovery of the sintering ore is carried out by the aid of a novel vertical (spiral) countercurrent cooling device for the sintering ore to recover the waste heat, and the middle-high temperature cooling waste gas at the temperature of 450-550 ℃ is obtained.
The average temperature of the flue gas of the sintering machine is generally not more than 150 ℃ but the flow rate is large; the temperature of the flue gas discharged by the air box at the tail part of the sintering machine is 300-400 ℃, and can reach 450 ℃ at most; the temperature of hot waste gas of a sintering cooling device is different with different cooling parts and is changed between 70 ℃ and 520 ℃, and the prior art only recycles the hot waste gas above 250 ℃.
The cooling waste gas recovered from the high-temperature sintered ore particles belongs to a medium-high temperature waste heat range, the temperature of the cooled waste gas is still at 120-150 ℃ after the steam Rankine cycle power generation is adopted, and the waste gas belongs to a low-temperature waste heat range and still has a utilization value; the average temperature of the sintering flue gas is 120-180 ℃, and the sintering flue gas belongs to the low-temperature waste heat range. The low-temperature waste heat of the two parts is utilized to generate electricity, so that the utilization rate of the sintering waste heat is certainly and greatly improved.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a vertical sintering waste heat driven steam and organic Rankine cycle series system, and through introducing an organic Rankine cycle power generation system, low-temperature waste gas after steam Rankine cycle power generation of a vertical (spiral) countercurrent cooling device of a sintering ore is used for the organic Rankine cycle power generation system; and the waste heat resource of the sintering flue gas is combined with the low-temperature waste gas generated after the steam Rankine cycle power generation of the vertical (spiral) countercurrent cooling device of the sintering ore, and the combined waste gas is used for an organic Rankine cycle power generation system.
The technical solution of the utility model is to provide a vertical sintering waste heat driven steam and organic Rankine cycle series system, which comprises a vertical spiral countercurrent cooling device body of the sinter, wherein the vertical spiral countercurrent cooling device body of the sinter is provided with an air outlet pipeline, an annular air inlet channel and a central air inlet channel;
an air outlet pipeline of the vertical spiral countercurrent cooling device body for the sinter is sequentially connected with a primary dust remover and a waste heat boiler;
the sintering flue gas fan outlet pipeline and the exhaust-heat boiler of the sintering machine are merged and connected to the evaporator by the cooling waste gas outlet pipeline, and the evaporator and the desulfurization and denitrification device are connected and then divided into two paths: one path is connected to a chimney, and the other path is connected with a flue gas recovery valve, a secondary dust remover, a cold air inlet valve, a circulating fan and a blow-off valve in sequence and then is connected to an annular air inlet channel and a central air inlet channel on the outer side of the vertical spiral countercurrent cooling device body of the sinter;
the waste heat boiler is connected with a first power generation system; the evaporator is connected with a second power generation system.
After the structure more than adopting, the utility model discloses a vertical sintering waste heat drive steam and organic rankine cycle series system compares with prior art, has following advantage:
aiming at the current situation that low-temperature waste heat resources generated after vertical spiral countercurrent waste heat recovery steam Rankine cycle power generation cannot be used for power generation, the low-temperature waste gas generated after the steam Rankine cycle power generation of the vertical (spiral) countercurrent cooling device for the sintering ore is used for the organic Rankine cycle power generation system by introducing the organic Rankine cycle power generation system; and the waste heat resource of the sintering flue gas is combined with the low-temperature waste gas generated by the sintering ore vertical spiral countercurrent cooling device after water vapor Rankine cycle power generation, and the combined waste heat resource is used for an organic Rankine cycle power generation system. The invention applies the waste heat resource in the sintering process to the power generation to the utmost extent, increases the self-power supply of the iron and steel enterprises, realizes the energy saving and consumption reduction of the sintering process and improves the economic benefit of the iron and steel enterprises.
As an improvement, the sintering machine is provided with an air box, a main flue and a flue gas dust remover, and the air box, the main flue, the flue gas dust remover and a sintering flue gas fan are sequentially connected through a sintering flue gas pipeline.
As the improvement, an annular air inlet valve is arranged between the diffusion valve and the annular air inlet channel.
As an improvement, a central air inlet valve is arranged between the diffusion valve and the central air inlet channel.
As an improvement, a chimney pipeline valve is arranged on a pipeline connecting the desulfurization and denitrification device and the chimney.
As an improvement, the first power generation system comprises a condensing steam turbine, a first condenser, a first circulating water pump, a deaerator, a second circulating water pump and a first power generator; the waste heat boiler, the condensing steam turbine, the first condenser, the first circulating water pump, the deaerator, the second circulating water pump and the waste heat boiler are sequentially connected through a water pipeline and a water steam pipeline, the deaerator is connected with the intermediate stage of the condensing steam turbine, and the tail end of the condensing steam turbine is connected with the first generator.
As an improvement, the second power generation system comprises an expander, a second condenser, a liquid storage tank, a working medium circulating pump and a second power generator; the evaporator, the expander, the second condenser, the liquid storage tank, the working medium circulating pump and the evaporator are sequentially connected through an organic working medium pipeline, and the tail end of the expander is connected with the second generator.
As an improvement, the working medium in the organic working medium pipeline is one or more of R600, R600a, R245fa, R236fa, R236ea, R601a, RC318 and R227 ea.
Drawings
FIG. 1 is a schematic structural diagram of a vertical sintering waste heat driven steam and organic Rankine cycle series system;
shown in the figure: the vertical spiral countercurrent cooling device for the sintered ore comprises a vertical spiral countercurrent cooling device body 1, an air outlet pipeline 2, a primary dust remover 3, a waste heat boiler 4, a condensing steam turbine 5, a first generator 6, a first condenser 7, a first circulating water pump 8, a deaerator 9, a second circulating water pump 10, an expander 11, a second generator 12, a second condenser 13, a liquid storage tank 14, a working medium circulating pump 15, an evaporator 16, a desulfurization and denitrification device 17, a chimney pipeline valve 18, a recovered flue gas valve 19, a chimney 20, a secondary dust remover 21, a cold air inlet valve 22, a circulating fan 23, a bleeding valve 24, an annular air inlet valve 25, an annular air inlet channel 26, a central air inlet valve 27, a central air inlet channel 28, a sintered flue gas fan 29, a flue gas dust remover 30, a main flue 31, an air box 32 and a.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification.
In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "including," and/or "containing," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Further, when a statement such as "… at least one" appears after the list of listed features, the entire listed feature is modified rather than modifying individual elements in the list.
The utility model discloses a vertical sintering waste heat drive steam and organic rankine cycle series system, including vertical spiral counterflow cooling device body 1 of sintering deposit, vertical spiral counterflow cooling device body 1 of sintering deposit is equipped with out tuber pipe way 2, annular intake duct 26 and central intake duct 28.
An air outlet pipeline 2 of the vertical spiral countercurrent cooling device body 1 for the sinter is sequentially connected with a primary dust remover 3 and a waste heat boiler 4.
An outlet pipeline of a sintering flue gas fan 29 of the sintering machine 33 and a cooled waste gas outlet pipeline of the waste heat boiler 4 are combined and connected to the evaporator 16, and the evaporator 16 and the desulfurization and denitrification device 17 are divided into two paths after being connected:
one path is connected to a chimney 20, and a chimney pipeline valve 18 is arranged on a pipeline connecting the desulfurization and denitrification device 17 and the chimney 20.
The other path is connected with a recycled flue gas valve 19, a secondary dust remover 21, a cold air inlet valve 22, a circulating fan 23 and a blow-off valve 24 in sequence and then is connected with an annular air inlet channel 26 and a central air inlet channel 28 on the outer side of the vertical spiral countercurrent cooling device body 1 of the sinter; an annular air inlet valve 25 is arranged between the bleeding valve 24 and the annular air inlet passage 26. A central inlet valve 27 is provided between the bleed valve 24 and a central inlet duct 28.
The sintering machine 33 is provided with an air box 32, a main flue 31 and a flue gas dust remover 30, wherein the air box 32, the main flue 31, the flue gas dust remover 30 and the sintering flue gas fan 29 are sequentially connected through a sintering flue gas pipeline.
The waste heat boiler 4 is connected with a first power generation system; the first power generation system comprises a condensing steam turbine 5, a first condenser 7, a first circulating water pump 8, a deaerator 9, a second circulating water pump 10 and a first power generator 6; the waste heat boiler 4, the condensing steam turbine 5, the first condenser 7, the first circulating water pump 8, the deaerator 9, the second circulating water pump 10 and the waste heat boiler 4 are sequentially connected through water and a water vapor pipeline, the deaerator 9 is connected to the middle stage of the condensing steam turbine 5, and the tail end of the condensing steam turbine 5 is connected with the first generator 6.
The evaporator 16 is connected to a second power generation system. The second power generation system comprises an expander 11, a second condenser 13, a liquid storage tank 14, a working medium circulating pump 15 and a second power generator 12; the evaporator 16, the expander 11, the second condenser 13, the liquid storage tank 14, the working medium circulating pump 15 and the evaporator 16 are sequentially connected through an organic working medium pipeline, and the tail end of the expander 11 is connected with the second generator 12. The working medium in the organic working medium pipeline is one or more of R600, R600a, R245fa, R236fa, R236ea, R601a, RC318 and R227 ea.
The utility model discloses a vertical sintering waste heat drive steam and organic rankine cycle series system's working method includes following step:
s1 and 700-850 ℃ high-temperature sintering ores are added into the vertical (spiral) countercurrent cooling device 1 of the sintering ores at intervals from the top, and the high-temperature sintering ores are changed into 140-160 ℃ cold sintering ores after heat exchange with 80-100 ℃ cooling gas entering from an air inlet pipeline and then discharged from the bottom of the device;
s2, introducing the heated 450-DEG C550-DEG C high-temperature waste gas into a waste heat boiler 4 after dedusting by a primary deduster 3, and cooling the waste gas to 120-DEG C150-DEG C after water is supplied in the heating boiler;
s3, mixing the cooled waste gas with sintering machine 33, dedusting by flue gas deduster 30, mixing the sintering flue gas at 180 ℃ blown out by sintering flue gas blower 29, heating the organic working medium in evaporator 16, removing the pollution gas in the flue gas by desulfurization and denitrification device 17, and then dividing the gas into two paths: one path of the gas is directly discharged from a chimney, a chimney pipeline valve 18 on the part of the connecting pipeline can adjust the flow rate of the gas discharged from the chimney, the other path of the gas passes through a secondary dust remover 21 and then is blown into an annular air inlet pipeline 26 and a central air inlet pipeline 28 by a circulating fan 23, a flue gas recovery valve 19 is arranged on the pipeline between the part of the desulfurization and denitrification device 17 and the secondary dust remover 21, the flow rate of the recovered flue gas is adjusted according to requirements, a cold air inlet valve 22 is arranged between the secondary dust remover 22 and the circulating fan 23 to supplement the flow rate of the cooled waste gas, meanwhile, a diffusion valve 24 is arranged between the circulating fan 23 and the air inlet pipeline and can diffuse part of the cooled gas to further realize the flow rate adjustment, an annular air inlet valve 25 is arranged before the cooled gas enters the annular air inlet pipeline 26, a central air inlet valve 27 is arranged before the cooled gas enters the central air inlet pipeline 28, and the cooled gas is heated by high;
s4, after the feed water in the waste heat boiler 4 is heated, the feed water becomes high-temperature high-pressure superheated steam, the condensing steam turbine 5 is pushed to do work, the condensing steam turbine 5 drives the first generator 7 to generate electricity, the exhaust steam discharged by the condensing steam turbine 5 after doing work is cooled in the first condenser 7, the first circulating water pump 8 provides power to enter the deaerator 9 and is heated by the steam extracted from the middle stage of the condensing steam turbine 5, and the deaerated liquid water provides power to enter the waste heat boiler 4 through the second circulating water pump 10 to serve as the feed water;
s5, evaporating the organic working medium heated in the evaporator 16 into gas at 100 ℃ and 200 ℃, pushing the second generator 12 to generate electricity through the expander 11, expanding the organic working medium in the expander 11 to do work, condensing the exhaust steam through the second condenser 13 to obtain liquid organic working medium, entering the liquid storage tank 14, and then providing power through the working medium circulating pump 15 to enter the evaporator 16 to exchange heat with the flue gas.
Claims (7)
1. The utility model provides a vertical sintering waste heat drive steam and organic rankine cycle series system which characterized in that: the vertical spiral countercurrent cooling device for the sinter is provided with an air outlet pipeline, an annular air inlet channel and a central air inlet channel;
an air outlet pipeline of the vertical spiral countercurrent cooling device body for the sinter is sequentially connected with a primary dust remover and a waste heat boiler;
the sintering flue gas fan outlet pipeline and the exhaust-heat boiler of the sintering machine are merged and connected to the evaporator by the cooling waste gas outlet pipeline, and the evaporator and the desulfurization and denitrification device are connected and then divided into two paths: one path is connected to a chimney, and the other path is connected with a flue gas recovery valve, a secondary dust remover, a cold air inlet valve, a circulating fan and a blow-off valve in sequence and then is connected to an annular air inlet channel and a central air inlet channel on the outer side of the vertical spiral countercurrent cooling device body of the sinter;
the waste heat boiler is connected with a first power generation system; the evaporator is connected with a second power generation system.
2. The vertical sintering waste heat driven steam and organic Rankine cycle series system according to claim 1, wherein: the sintering machine is provided with an air box, a main flue and a flue gas dust remover, wherein the air box, the main flue, the flue gas dust remover and a sintering flue gas fan are sequentially connected through a sintering flue gas pipeline.
3. The vertical sintering waste heat driven steam and organic Rankine cycle series system according to claim 1, wherein: and an annular air inlet valve is arranged between the blow-off valve and the annular air inlet channel.
4. The vertical sintering waste heat driven steam and organic Rankine cycle series system according to claim 1, wherein: and a central air inlet valve is arranged between the bleeding valve and the central air inlet channel.
5. The vertical sintering waste heat driven steam and organic Rankine cycle series system according to claim 1, wherein: and a chimney pipeline valve is arranged on a pipeline connecting the desulfurization and denitrification device and the chimney.
6. The vertical sintering waste heat driven steam and organic Rankine cycle series system according to any one of claims 1 to 5, characterized in that: the first power generation system comprises a condensing steam turbine, a first condenser, a first circulating water pump, a deaerator, a second circulating water pump and a first power generator; the waste heat boiler, the condensing steam turbine, the first condenser, the first circulating water pump, the deaerator, the second circulating water pump and the waste heat boiler are sequentially connected through a water pipeline and a water steam pipeline, the deaerator is connected with the intermediate stage of the condensing steam turbine, and the tail end of the condensing steam turbine is connected with the first generator.
7. The vertical sintering waste heat driven steam and organic Rankine cycle series system according to any one of claims 1 to 5, characterized in that: the second power generation system comprises an expander, a second condenser, a liquid storage tank, a working medium circulating pump and a second power generator; the evaporator, the expander, the second condenser, the liquid storage tank, the working medium circulating pump and the evaporator are sequentially connected through an organic working medium pipeline, and the tail end of the expander is connected with the second generator.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653821A (en) * | 2018-12-31 | 2019-04-19 | 浙能资本控股有限公司 | Vertical sintering waste heat driving water vapour and Organic Rankine Cycle train |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109653821A (en) * | 2018-12-31 | 2019-04-19 | 浙能资本控股有限公司 | Vertical sintering waste heat driving water vapour and Organic Rankine Cycle train |
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