CN103353239A - Improved lime kiln exhaust gas waste heat power generation system and power generation method thereof - Google Patents
Improved lime kiln exhaust gas waste heat power generation system and power generation method thereof Download PDFInfo
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- CN103353239A CN103353239A CN2013103002324A CN201310300232A CN103353239A CN 103353239 A CN103353239 A CN 103353239A CN 2013103002324 A CN2013103002324 A CN 2013103002324A CN 201310300232 A CN201310300232 A CN 201310300232A CN 103353239 A CN103353239 A CN 103353239A
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- 239000007789 gas Substances 0.000 title claims abstract description 54
- 239000002918 waste heat Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 11
- 235000008733 Citrus aurantifolia Nutrition 0.000 title abstract description 4
- 235000011941 Tilia x europaea Nutrition 0.000 title abstract description 4
- 239000004571 lime Substances 0.000 title abstract description 4
- 238000010248 power generation Methods 0.000 title abstract 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 88
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 23
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 239000002912 waste gas Substances 0.000 claims description 18
- 238000010521 absorption reaction Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000008676 import Effects 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 238000009835 boiling Methods 0.000 claims description 7
- 239000003517 fume Substances 0.000 claims description 5
- 230000009183 running Effects 0.000 claims description 5
- 238000005304 joining Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 3
- 239000001301 oxygen Substances 0.000 abstract 3
- 229910052760 oxygen Inorganic materials 0.000 abstract 3
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000009102 absorption Effects 0.000 description 11
- 230000005611 electricity Effects 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 235000019628 coolness Nutrition 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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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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Abstract
The invention discloses an improved lime kiln exhaust gas waste heat power generation system and a power generation system of the improved lime kiln exhaust gas waste heat power generation system. The power generation system comprises a chimney, exhaust gas valves, a waste heat boiler, a draught fan, a steam pocket, a steam turbine, a power generator, a condenser, a cooling tower, a condensate pump, an oxygen remover, a boiler water feeding pump, an oxygen removing water returning pipe and a redundant steam inlet pipe. A superheater, an evaporator and an economizer are sequentially arranged inside the waste heat boiler from top to bottom. The oxygen removing water returning pipe is connected with a water outlet of the boiler water feeding pump. The redundant steam inlet pipe is connected with a steam inlet of the superheater. According to the power generation method, redundant saturated steam in a steam pipe net is supplemented into the superheater inside the waste heat boiler through the redundant steam feeding pipe, the flow of superheated steam entering the steam turbine is increased, and the generated power amount is increased. According to the power generation method, a dual-pressure system can be further used, the heat transmission temperature difference is reduced, the entropy production is reduced, and the generated power amount is increased.
Description
Technical field
The present invention relates to a kind of lime kiln afterheat electricity generation system and electricity-generating method thereof, especially a kind of modified limekiln exhaust gas afterheat generating system and electricity-generating method thereof belong to the cogeneration technology field.
Background technology
Existing limekiln exhaust gas afterheat generating system, its structure as shown in Figure 1, comprise chimney 1, gas fume valve 2, waste heat boiler 6, air-introduced machine 7, drum 8, steam turbine 9, generator 10, condenser 11, cooling tower 12, be provided with successively from top to bottom superheater 3, evaporimeter 4 and economizer 5 in the waste heat boiler 6.
The electricity generating principle of above-mentioned limekiln exhaust gas afterheat generating system is: waste heat boiler 6 import waste gas are from the limekiln preheater, approximately 350～400 ℃ of intake air temperature, this waste gas enters waste heat boiler 6, by being arranged in superheater 3, evaporimeter 4 and the economizer 5 in the waste heat boiler 6, progressively be cooled to 160～180 ℃, these waste gas are discharged in the atmosphere by chimney 1 through air-introduced machine 7; Boiler feedwater from oxygen-eliminating device 14, throw the economizer 5 of waste heat boiler 6 into by boiler feed pump 15, through entering drum 8 after economizer 5 heating, water in the drum 8 is got back in the drum 8 after evaporimeter 4 heat absorption boilings by natural circulation mode, the saturated vapor of separating in the drum 8 becomes superheated steam after through superheater 3 heat absorptions, then enter steam turbine 9 expansion actings, drive generator 10 runnings by steam turbine 9 and produce electric energy, exhaust steam after the acting becomes condensate water after condenser 11 coolings, get to oxygen-eliminating device 14 by condensate pump 13.
But, there is following defective in above-mentioned this limekiln exhaust gas afterheat generating system: 1) the attached limekiln production line of general steel plant has saturated vapor more than needed in steam pipe system, steam pressure is 1.0MPa approximately, and system does not utilize these saturated vapors more than needed, causes generated energy not enough; 2) because vapour system is single pressing system, and heat transfer temperature difference is large, system's entropy increases, and energy is not better utilized.
Summary of the invention
The objective of the invention is in order to solve the defective of above-mentioned prior art, provide a kind of the utilization that saturated vapor more than needed is arranged in the steam pipe system, be improved so that enter the flow of steam turbine superheated steam, can increase the modified limekiln exhaust gas afterheat generating system of generating capacity.
Another object of the present invention is to provide a kind of electricity-generating method of modified limekiln exhaust gas afterheat generating system.
Purpose of the present invention can reach by taking following technical scheme:
Modified limekiln exhaust gas afterheat generating system, comprise chimney, gas fume valve, waste heat boiler, air-introduced machine, drum, steam turbine, generator, condenser, cooling tower, condensate pump, oxygen-eliminating device and boiler feed pump, be disposed with superheater, evaporimeter and economizer in the described waste heat boiler from top to bottom, it is characterized in that: also comprise deaerated water return pipe and residue steam steam inlet pipe, described deaerated water return pipe links to each other with the delivery port of boiler feed pump, and described residue steam steam inlet pipe links to each other with the air intake of superheater.
As a kind of preferred version, the delivery port of described boiler feed pump links to each other with the water inlet of economizer, the delivery port of described economizer links to each other with the water inlet of drum, the water inlet of described evaporimeter links to each other with the delivery port of drum, the delivery port of described evaporimeter links to each other with the vapour-liquid two-phase import of drum, the air intake of described superheater links to each other with the venthole of drum, and the venthole of described superheater links to each other with the air intake of steam turbine.
As a kind of preferred version, described superheater is high-pressure superheater, and described evaporimeter is high pressure evaporator, and described economizer is high-temperature economizer, and described drum is low-pressure drum; Also be provided with low-pressure superheater, low pressure evaporator and low-level (stack-gas) economizer in the described waste heat boiler, described low-pressure superheater, low pressure evaporator and low-level (stack-gas) economizer are sequentially arranged in the below of high-temperature economizer, and described system also comprises the high pressure drum; The delivery port of described boiler feed pump links to each other with the water inlet of low-level (stack-gas) economizer, the delivery port of described low-level (stack-gas) economizer links to each other with the water inlet of high-temperature economizer and the water inlet of low-pressure drum respectively, the water inlet of described low pressure evaporator links to each other with the delivery port of low-pressure drum, the delivery port of described low pressure evaporator links to each other with the vapour-liquid two-phase import of low-pressure drum, the air intake of described low-pressure superheater links to each other with the venthole of low-pressure drum, the venthole of described low-pressure superheater links to each other with the low pressure admission mouth of steam turbine and the steam inlet of oxygen-eliminating device respectively, the delivery port of described high-temperature economizer links to each other with the water inlet of high pressure drum, the water inlet of described high pressure evaporator links to each other with the delivery port of high pressure drum, the delivery port of described high pressure evaporator links to each other with the vapour-liquid two-phase import of high pressure drum, the air intake of described high-pressure superheater links to each other with the venthole of high pressure drum, and the venthole of described high-pressure superheater links to each other with the high-pressure admission mouth of steam turbine.
As a kind of preferred version, described waste heat boiler bottom is provided with waste gas outlet, and described waste gas outlet is discharged waste gas by joining successively with air-introduced machine, chimney.
Another object of the present invention can reach by taking following technical scheme:
The electricity-generating method of modified limekiln exhaust gas afterheat generating system is characterized in that may further comprise the steps:
1) waste gas of limekiln preheater enters waste heat boiler, by after superheater, evaporimeter and the economizer heat exchange cooling, discharges atmosphere by air-introduced machine by chimney successively;
2) from the boiler feedwater of oxygen-eliminating device, thrown into the economizer of waste heat boiler by boiler feed pump, through entering drum after the economizer heating;
3) water in drum returns in the drum after evaporimeter heat absorption boiling by natural circulation mode;
4) saturated vapor of separating from drum and mix from the residue steam from pipe network that the residue steam steam inlet pipe is come in after together after superheater is overheated, entering the acting of expanding in the steam turbine, drive generator operation by steam turbine and produce electric energy;
5) exhaust steam after the acting becomes condensate water through the condenser cooling, throw condensate water into oxygen-eliminating device by condensate pump, send back to the boiler water system that produces residue steam by will the have more than needed condensate water of saturated vapor of deaerated water return pipe, remaining condensate water is delivered in the waste heat boiler.
Another object of the present invention can also reach by taking following technical scheme:
The electricity-generating method of modified limekiln exhaust gas afterheat generating system is characterized in that may further comprise the steps:
1) waste gas of limekiln preheater enters waste heat boiler, by after high-pressure superheater, high pressure evaporator, high-temperature economizer, low-pressure superheater, low pressure evaporator and the low-level (stack-gas) economizer heat exchange cooling, enters atmosphere by air-introduced machine by chimney successively;
2) from the boiler feedwater of oxygen-eliminating device, thrown into the low-level (stack-gas) economizer of waste heat boiler by boiler feed pump, through being divided into two-way after the low-level (stack-gas) economizer heating, the one tunnel enters low-pressure drum, and another road arrives the high pressure drum after entering the high-temperature economizer heating;
3) water in high pressure drum and low-pressure drum returns after high pressure evaporator and low pressure evaporator heat absorption boiling respectively in separately the drum by natural circulation mode;
4) saturated vapor of separating from the high pressure drum and mix from the residue steam from pipe network that the residue steam steam inlet pipe is come in after together after high-pressure superheater is overheated, the high-pressure admission mouth that the enters steam turbine acting of in steam turbine, expanding; Simultaneously, the saturated vapor of separating from low-pressure drum is after low-pressure superheater is overheated, a part enters the steam inlet of oxygen-eliminating device, and the low pressure admission mouth that another part the enters steam turbine acting of expanding in steam turbine drives generator operation by steam turbine and produces electric energy;
5) exhaust steam after the acting becomes condensate water through the condenser cooling, by condensate pump condensate water is got to oxygen-eliminating device, send back to the boiler water system that produces residue steam by will the have more than needed condensate water of saturated vapor of deaerated water return pipe, remaining condensate water is delivered in the waste heat boiler.
The present invention has following beneficial effect with respect to prior art:
1, electricity generation system of the present invention makes the superheater in the waste heat boiler replenish the saturated vapor of having more than needed in the steam pipe system by the residue steam steam inlet pipe, has improved the superheat steam flow that enters steam turbine, so that generated energy increases.
2, electricity generation system of the present invention can adopt dual pressure system, boiler feed pump boiler feedwater out can be first through after the low-level (stack-gas) economizer heat absorption, major part enters high-temperature economizer and continues to enter the high pressure drum after the heat absorption, fraction directly enters low-pressure drum, the water and steam of low-pressure drum is in the heat absorption of low-temperature flue gas section, and the water and steam of high pressure drum has reduced heat transfer temperature difference in the heat absorption of high-temperature flue gas section, reduce the entropy product, increased generated energy.
Description of drawings
Fig. 1 is existing limekiln exhaust gas afterheat generating system structural representation.
Fig. 2 is the structural representation of limekiln exhaust gas afterheat generating system embodiment 1 of the present invention.
Fig. 3 is the structural representation of limekiln exhaust gas afterheat generating system embodiment 2 of the present invention.
The specific embodiment
Embodiment 1:
As shown in Figure 2, the modified limekiln exhaust gas afterheat generating system of the present embodiment, comprise chimney 1, gas fume valve 2, waste heat boiler 6, air-introduced machine 7, drum 8, steam turbine 9, generator 10, condenser 11, cooling tower 12, condensate pump 13, oxygen-eliminating device 14, boiler feed pump 15, deaerated water return pipe 16 and residue steam steam inlet pipe 17, be disposed with superheater 3 from top to bottom in the described waste heat boiler 6, evaporimeter 4 and economizer 5, the delivery port of described boiler feed pump 15 links to each other with the water inlet of economizer 5, the delivery port of described economizer 5 links to each other with the water inlet of drum 8, the water inlet of described evaporimeter 4 links to each other with the delivery port of drum 8, the delivery port of described evaporimeter 4 links to each other with the vapour-liquid two-phase import of drum 8, the air intake of described superheater 3 links to each other with the venthole of drum 8, the venthole of described superheater 3 links to each other with the air intake of steam turbine 9, the delivery port of described boiler feed pump 15 also links to each other with deaerated water return pipe 16, and the air intake of described superheater 3 also links to each other with residue steam steam inlet pipe 17.
In the present embodiment, described waste heat pot 6 bottoms are provided with waste gas outlet, and described waste gas outlet is discharged waste gas by joining successively with air-introduced machine 7, chimney 1.
The electricity generating principle of the modified limekiln exhaust gas afterheat generating system of the present embodiment is as follows:
1) waste gas of limekiln preheater enters waste heat boiler 6, this EGT is 350～400 ℃, by after superheater 3, evaporimeter 4 and the economizer 5 heat exchange cooling, this EGT is reduced to 160～180 ℃, enters atmosphere by air-introduced machine 7 by chimney 1 successively for it;
2) from the boiler feedwater of oxygen-eliminating device 14, thrown into the economizer 5 of waste heat boiler 6 by boiler feed pump 15, through entering drum 8 after economizer 5 heating;
3) water in drum 8 returns in the drum 8 after evaporimeter 4 heat absorption boilings by natural circulation mode;
4) saturated vapor of separating from drum 8 and mix from the residue steam from pipe network that residue steam steam inlet pipe 17 is come in after together after superheater 3 is overheated, enter steam turbine 9 interior expansions actings, drive generators 10 runnings by steam turbine 9 and produce electric energy;
5) exhaust steam after the acting becomes condensate water through condenser 11 coolings, throw condensate water into oxygen-eliminating device 14 by condensate pump 13, send back to the boiler water system that produces residue steam by will the have more than needed condensate water of saturated vapor of deaerated water return pipe 16, remaining condensate water is delivered in the waste heat boiler 6.
The modified limekiln exhaust gas afterheat generating system of the present embodiment has improved the superheat steam flow that enters steam turbine 9 owing to making superheater 3 replenish saturated vapor more than needed by residue steam steam inlet pipe 17, so that generated energy increases.
Embodiment 2:
As shown in Figure 3, the modified limekiln exhaust gas afterheat generating system of the present embodiment, comprise chimney 1, gas fume valve 2, waste heat boiler 6, air-introduced machine 7, low-pressure drum 8, high pressure drum 21, steam turbine 9, generator 10, condenser 11, cooling tower 12, condensate pump 13, oxygen-eliminating device 14, boiler feed pump 15, deaerated water return pipe 16 and residue steam steam inlet pipe 17, be disposed with high-pressure superheater 3 from top to bottom in the described waste heat boiler 6, high pressure evaporator 4, high-temperature economizer 5, low-pressure superheater 18, low pressure evaporator 19 and low-level (stack-gas) economizer 20, the delivery port of described boiler feed pump 15 links to each other with the water inlet of low-level (stack-gas) economizer 20, the delivery port of described low-level (stack-gas) economizer 20 links to each other with the water inlet of high-temperature economizer 5 and the water inlet of low-pressure drum 8 respectively, the water inlet of described low pressure evaporator 19 links to each other with the delivery port of low-pressure drum 8, the delivery port of described low pressure evaporator 19 links to each other with the vapour-liquid two-phase import of low-pressure drum 8, the air intake of described low-pressure superheater 18 links to each other with the venthole of low-pressure drum 8, the venthole of described low-pressure superheater 18 links to each other with the low pressure admission mouth of steam turbine 9 and the steam inlet of oxygen-eliminating device 14 respectively, the delivery port of described high-temperature economizer 5 links to each other with the water inlet of high pressure drum 21, the water inlet of described high pressure evaporator 4 links to each other with the delivery port of high pressure drum 21, the delivery port of described high pressure evaporator 4 links to each other with the vapour-liquid two-phase import of high pressure drum 21, the air intake of described high-pressure superheater 3 links to each other with the venthole of high pressure drum 21, the venthole of described high-pressure superheater 3 links to each other with the high-pressure admission mouth of steam turbine 9, the delivery port of described boiler feed pump 15 also links to each other with deaerated water return pipe 16, and the air intake of described high-pressure superheater 3 also links to each other with residue steam steam inlet pipe 17.
The electricity generating principle of the modified limekiln exhaust gas afterheat generating system of the present embodiment is as follows:
1) waste gas of limekiln preheater enters waste heat boiler 6, this EGT is 350～400 ℃, it is successively by after high-pressure superheater 3, high pressure evaporator 4, high-temperature economizer 5, low-pressure superheater 18, low pressure evaporator 19 and the low-level (stack-gas) economizer 20 heat exchange cooling, this EGT is reduced to 140～160 ℃, enters atmosphere by air-introduced machine 7 by chimney 1;
2) from the boiler feedwater of oxygen-eliminating device 14, thrown into the low-level (stack-gas) economizer 20 of waste heat boiler 6 by boiler feed pump 15, through being divided into two-way after low-level (stack-gas) economizer 20 heating, the one tunnel enters low-pressure drum 8, and another road arrives high pressure drum 21 after entering high-temperature economizer 5 heating;
3) water in high pressure drum 21 and low-pressure drum 8 returns after the 19 heat absorption boilings of high pressure evaporator 4 and low pressure evaporator respectively in separately the drum by natural circulation mode;
4) saturated vapor of separating from high pressure drum 21 and mix from the residue steam from pipe network that residue steam steam inlet pipe 17 is come in after together after high-pressure superheater 3 is overheated, enter the high-pressure admission mouth of steam turbine 9 in steam turbine 9 interior expansions actings; Simultaneously, the saturated vapor of separating from low-pressure drum 8 is after low-pressure superheater 18 is overheated, a part enters the steam inlet of oxygen-eliminating device, and another part enters the low pressure admission mouth of steam turbine 9 in steam turbine 9 interior expansion actings, drives generator 10 runnings by steam turbine 9 and produces electric energy;
5) exhaust steam after the acting becomes condensate water through condenser 11 coolings, by condensate pump 13 condensate water is got to oxygen-eliminating device 14, send back to the boiler water system that produces residue steam by will the have more than needed condensate water of saturated vapor of deaerated water return pipe 16, remaining condensate water is delivered in the waste heat boiler 6.
The modified limekiln exhaust gas afterheat generating system of the present embodiment is owing to having adopted two pressure vapour systems, feedwater major part after low-level (stack-gas) economizer 20 heating enters high-temperature economizer 18 and continues to enter high pressure drum 21 after the heat absorption, fraction directly enters low-pressure drum 8, the water and steam of low-pressure drum 8 absorbs heat in the low-temperature flue gas section, the water and steam of high pressure drum 21 absorbs heat in the high-temperature flue gas section, reduced heat transfer temperature difference, reduced the entropy product, make high-pressure superheater 3 replenish saturated vapor more than needed by residue steam steam inlet pipe 17 simultaneously, increased the high pressure superheated steam flow that enters steam turbine 9, generated energy is increased.
The above; it only is the preferred embodiment of the invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in scope disclosed in this invention; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all belonged to protection scope of the present invention.
Claims (6)
1. modified limekiln exhaust gas afterheat generating system, comprise chimney (1), gas fume valve (2), waste heat boiler (6), air-introduced machine (7), drum (8), steam turbine (9), generator (10), condenser (11), cooling tower (12), condensate pump (13), oxygen-eliminating device (14) and boiler feed pump (15), be disposed with superheater (3) in the described waste heat boiler (6) from top to bottom, evaporimeter (4) and economizer (5), it is characterized in that: also comprise deaerated water return pipe (16) and residue steam steam inlet pipe (17), described deaerated water return pipe (16) links to each other with the delivery port of boiler feed pump (15), and described residue steam steam inlet pipe (17) links to each other with the air intake of superheater (3).
2. modified limekiln exhaust gas afterheat generating system according to claim 1, it is characterized in that: the delivery port of described boiler feed pump (15) links to each other with the water inlet of economizer (5), the delivery port of described economizer (5) links to each other with the water inlet of drum (8), the water inlet of described evaporimeter (4) links to each other with the delivery port of drum (8), the delivery port of described evaporimeter (4) links to each other with the vapour-liquid two-phase import of drum (8), the air intake of described superheater (3) links to each other with the venthole of drum (8), and the venthole of described superheater (3) links to each other with the air intake of steam turbine (9).
3. modified limekiln exhaust gas afterheat generating system according to claim 1, it is characterized in that: described superheater (3) is high-pressure superheater, described evaporimeter (4) is high pressure evaporator, described economizer (5) is high-temperature economizer, and described drum (8) is low-pressure drum; Also be provided with low-pressure superheater (18), low pressure evaporator (19) and low-level (stack-gas) economizer (20) in the described waste heat boiler (6), described low-pressure superheater (18), low pressure evaporator (19) and low-level (stack-gas) economizer (20) are sequentially arranged in the below of high-temperature economizer (5), and described system also comprises high pressure drum (21); The delivery port of described boiler feed pump (15) links to each other with the water inlet of low-level (stack-gas) economizer (20), the delivery port of described low-level (stack-gas) economizer (20) links to each other with the water inlet of high-temperature economizer (5) and the water inlet of low-pressure drum (8) respectively, the water inlet of described low pressure evaporator (19) links to each other with the delivery port of low-pressure drum (8), the delivery port of described low pressure evaporator (19) links to each other with the vapour-liquid two-phase import of low-pressure drum (8), the air intake of described low-pressure superheater (18) links to each other with the venthole of low-pressure drum (8), the venthole of described low-pressure superheater (18) links to each other with the low pressure admission mouth of steam turbine (9) and the steam inlet of oxygen-eliminating device (14) respectively, the delivery port of described high-temperature economizer (5) links to each other with the water inlet of high pressure drum (21), the water inlet of described high pressure evaporator (4) links to each other with the delivery port of high pressure drum (21), the delivery port of described high pressure evaporator (4) links to each other with the vapour-liquid two-phase import of high pressure drum (21), the air intake of described high-pressure superheater (3) links to each other with the venthole of high pressure drum (21), and the venthole of described high-pressure superheater (3) links to each other with the high-pressure admission mouth of steam turbine (9).
4. each described modified limekiln exhaust gas afterheat generating system according to claim 1-3, it is characterized in that: described waste heat boiler (6) bottom is provided with waste gas outlet, and described waste gas outlet is by joining successively waste gas is discharged with air-introduced machine (7), chimney (1).
5. based on the electricity-generating method of the described system of claim 2, it is characterized in that may further comprise the steps:
1) waste gas of limekiln preheater enters waste heat boiler (6), by after superheater (3), evaporimeter (4) and economizer (5) the heat exchange cooling, enters atmosphere by air-introduced machine (7) by chimney (1) successively;
2) from the boiler feedwater of oxygen-eliminating device (14), thrown into the economizer (5) of waste heat boiler (6) by boiler feed pump (15), through entering drum (8) after economizer (5) heating;
3) water in drum (8) returns in the drum (8) after evaporimeter (4) heat absorption boiling by natural circulation mode;
4) saturated vapor of separating from drum (8) and mix from the residue steam from pipe network that residue steam steam inlet pipe (17) is come in after together after superheater (3) is overheated, enter the acting of expanding in the steam turbine (9), drive generator (10) running by steam turbine (9) and produce electric energy;
5) exhaust steam after the acting becomes condensate water through condenser (11) cooling, throw condensate water into oxygen-eliminating device (14) by condensate pump (13), send back to the boiler water system that produces residue steam by will the have more than needed condensate water of saturated vapor of deaerated water return pipe (16), remaining condensate water is delivered in the waste heat boiler (6).
6. based on the electricity-generating method of the described system of claim 3, it is characterized in that may further comprise the steps:
1) waste gas of limekiln preheater enters waste heat boiler (6), by after high-pressure superheater (3), high pressure evaporator (4), high-temperature economizer (5), low-pressure superheater (18), low pressure evaporator (19) and low-level (stack-gas) economizer (20) the heat exchange cooling, enter atmosphere by air-introduced machine (7) by chimney (1) successively;
2) from the boiler feedwater of oxygen-eliminating device (14), thrown into the low-level (stack-gas) economizer (20) of waste heat boiler (6) by boiler feed pump (15), through being divided into two-way after low-level (stack-gas) economizer (20) heating, one the tunnel enters low-pressure drum (8), and another road arrives high pressure drum (21) after entering high-temperature economizer (5) heating;
3) water in high pressure drum (21) and low-pressure drum (8) returns after high pressure evaporator (4) and low pressure evaporator (19) heat absorption boiling respectively in separately the drum by natural circulation mode;
4) saturated vapor of separating from high pressure drum (21) and mix from the residue steam from pipe network that residue steam steam inlet pipe (17) is come in after together after high-pressure superheater (3) is overheated, the high-pressure admission mouth that enters steam turbine (9) acting of in steam turbine (9), expanding; Simultaneously, the saturated vapor of separating from low-pressure drum (8) is after low-pressure superheater (18) is overheated, a part enters the steam inlet of oxygen-eliminating device (14), the low pressure admission mouth that another part enters steam turbine (9) acting of expanding in steam turbine (9) drives generator (10) running by steam turbine (9) and produces electric energy;
5) exhaust steam after the acting becomes condensate water through condenser (11) cooling, by condensate pump (13) condensate water is got to oxygen-eliminating device (14), send back to the boiler water system that produces residue steam by will the have more than needed condensate water of saturated vapor of deaerated water return pipe (16), remaining condensate water is delivered in the waste heat boiler (6).
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673650A (en) * | 2013-12-13 | 2014-03-26 | 南京凯盛开能环保能源有限公司 | Steel mill surplus gas and sanitary steam comprehensive utilization system and method |
| WO2015149572A1 (en) * | 2014-04-02 | 2015-10-08 | 银龙 | Energy-conserving boiler |
| CN105605828A (en) * | 2016-01-14 | 2016-05-25 | 江苏大学 | Waste heat and waste pressure type water source heat pump system applying boiler smoke waste heat |
| CN107676770A (en) * | 2017-10-18 | 2018-02-09 | 江苏永钢集团有限公司 | A kind of afterheat steam superheating system |
| CN109708122A (en) * | 2019-03-08 | 2019-05-03 | 苏华建设集团有限公司 | Incineration heating device |
| CN113074028A (en) * | 2021-04-22 | 2021-07-06 | 中创清洁能源发展（沈阳）股份有限公司 | Flue gas low-temperature waste heat power generation system utilizing generator set |
| CN114166014A (en) * | 2020-09-11 | 2022-03-11 | 孙厚才 | High-temperature solid material waste heat recovery system with shaft kiln structure |
| CN115127359A (en) * | 2022-07-05 | 2022-09-30 | 中材节能股份有限公司 | Low-temperature low-pressure waste heat power generation reheating method and system applied to cement kiln |
| WO2023245774A1 (en) * | 2022-06-24 | 2023-12-28 | 张近 | Power generation heating device based on air energy boiler |
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| CN103673650A (en) * | 2013-12-13 | 2014-03-26 | 南京凯盛开能环保能源有限公司 | Steel mill surplus gas and sanitary steam comprehensive utilization system and method |
| WO2015149572A1 (en) * | 2014-04-02 | 2015-10-08 | 银龙 | Energy-conserving boiler |
| CN105605828A (en) * | 2016-01-14 | 2016-05-25 | 江苏大学 | Waste heat and waste pressure type water source heat pump system applying boiler smoke waste heat |
| CN107676770A (en) * | 2017-10-18 | 2018-02-09 | 江苏永钢集团有限公司 | A kind of afterheat steam superheating system |
| CN107676770B (en) * | 2017-10-18 | 2023-10-10 | 江苏永钢集团有限公司 | A waste heat steam superheating system |
| CN109708122A (en) * | 2019-03-08 | 2019-05-03 | 苏华建设集团有限公司 | Incineration heating device |
| CN114166014A (en) * | 2020-09-11 | 2022-03-11 | 孙厚才 | High-temperature solid material waste heat recovery system with shaft kiln structure |
| CN113074028A (en) * | 2021-04-22 | 2021-07-06 | 中创清洁能源发展（沈阳）股份有限公司 | Flue gas low-temperature waste heat power generation system utilizing generator set |
| WO2023245774A1 (en) * | 2022-06-24 | 2023-12-28 | 张近 | Power generation heating device based on air energy boiler |
| CN115127359A (en) * | 2022-07-05 | 2022-09-30 | 中材节能股份有限公司 | Low-temperature low-pressure waste heat power generation reheating method and system applied to cement kiln |
| CN115127359B (en) * | 2022-07-05 | 2024-05-03 | 中材节能股份有限公司 | Low-temperature low-pressure waste heat power generation reheating method and system applied to cement kiln |
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