CN202927864U - Waste-heat utilization system for desulfuration smoke dehumidification - Google Patents
Waste-heat utilization system for desulfuration smoke dehumidification Download PDFInfo
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- CN202927864U CN202927864U CN2012205621688U CN201220562168U CN202927864U CN 202927864 U CN202927864 U CN 202927864U CN 2012205621688 U CN2012205621688 U CN 2012205621688U CN 201220562168 U CN201220562168 U CN 201220562168U CN 202927864 U CN202927864 U CN 202927864U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model relates to a desulfuration smoke dehumidification device, and provides a waste-heat utilization system for desulfuration smoke dehumidification. The waste-heat utilization system aims to achieve the purposes: the problem of wet chimneys is solved fundamentally, a part of energy inside smoke can be recovered and used for heating cooling water, the cooling water requiring the heat can be provided for production processes for being used, and moisture separated out from the smoke can be collected at the same time and returned to a desulfurizing tower for recycling. The waste-heat utilization system comprises a boiler, the desulfurizing tower, a chimney, a condenser and a cooling tower. The boiler, the desulfurizing tower and the chimney are connected through a pipeline. Smoke is exhausted from the hearth tail of the boiler under effect of an induced draft fan, enters the desulfurizing tower for desulfuration, and then enters the chimney to be exhausted out of the chimney. An air/gas heat exchanger is connected on a desulfuration smoke outlet position of the desulfurizing tower, a smoke outlet of the desulfurizing tower is connected with a smoke inlet of the air/gas heat exchanger, and a smoke outlet of the air/gas heat exchanger is connected with a smoke inlet of the chimney. A water inlet of the air/gas heat exchanger is connected with external cold water, and a water outlet of the air/gas heat exchanger is connected with a hot water tank or application places needing hot water.
Description
Technical field
The utility model relates to a kind of desulfurization fume dehydrating unit, particularly go out the bootstrap system that the clean flue gas after desulfurizing tower dehumidifies again.
Background technology
Issue along with 2011 editions " fossil-fuel power plant atmospheric pollutant emission standards ", built unit all installs flue gas desulfur device on the original basis additional, at present, domestic 300MW and above large-scale unit adopt the limestone-gypsum method flue gas desulfurization technology mostly, and the ammonia process of desulfurization also begins use on Industrial Boiler and expand to electricity generation boiler gradually.No matter be limestone-gypsum method flue gas desulfurization or ammonia type flue gas desulfurizing, they all belong to wet process of FGD.In these flue gas desulfur devices, there is quite a few unit that flue gas heater is not set, this has just produced so-called " wet chimney " preservative treatment and other relevant issues.
1. the problem that the chimney anticorrosion that wets is processed.Flue gas is through after desulfurization, although the content of the sulfur dioxide in flue gas greatly reduce, through wet desulphurization, smoke moisture increases, temperature reduces, and flue gas is very easily in the inner wall of stack dewfall, after in flue gas, remaining sulfur trioxide dissolves, form the very strong dilution heat of sulfuric acid of corrosivity, the corrosion inner wall of stack.
2. the Pollutants Diffusion scope is dwindled, and affects surrounding environment;
3. atmosphere hoist height reduction, visibility reduce;
4. the low-temperature flue gas lifting of wet cigarette fontanel discharging is little, and vertical proliferation speed is low, and the possibility that occurs washing under plume is larger;
5. chimney " rainfall ", its cause is the drop that flue gas is carried secretly, this rainfall usually occurs in chimney downwind side hundreds of rice.
6. desulfurizing tower peripheral equipment corrosion;
Wet chimney and the relevant issues brought for solving above-mentioned wet desulphurization, people have thought a lot of ways, the method that generally adopts is heating, improves flue-gas temperature, reduces the relative humidity of smoke evacuation.Heating can have following several mode: 1. and increase GGH or IGGH, namely by heat transmission equipment, utilize the gas energy of desulfurizing tower upstream to the clean flue gas of desulfurizing tower outlet, generally can be with the clean flue gas of desulfurization to 70-80 ℃.And wash under plume in order to prevent, the chimney outlet flow velocity should not be lower than 1.5 times of this At The Height wind speed, generally should be at 20-30 m/s, and exhaust gas temperature is more than 100 ℃; 2 increase flue gas heater, and utilizing steam is also a kind of solution to clean flue gas, but very uneconomical; 3 adopt the clean flue gas of boiler secondary air heating.Germany also has flue gas is directly entered in the water smoke of double-curve cooling column in addition, enters in environment with the cooling tower air after the cooling tower washing and goes.
In most of the cases, wet chimney scheme has minimum investment, operation and maintenance cost, based on the consideration of economic aspect and there is no clear and definite regulation, the wet chimney operation of the large more options of the newly-designed FGD of China, but, wet chimney operation and the problem that produces is not solved at all, along with the environmental protection aspect become gradually tight, other factors such as opacity of flue gas diffusion and plume might overwhelm the consideration of economic aspect.We propose a new thinking for this reason, can solve the problems of wet chimney operation.
Summary of the invention:
Technical problem to be solved in the utility model is, a kind of bootstrap system of desulfurization fume dehumidifying is provided, additionally do not increasing under the prerequisite of energy resource consumption, fundamentally solve wet chimney problem, and the part energy in can recovered flue gas, in order to heating and cooling water, obtain cooling water after heat and offer again production technology and use, the moisture of separating out from flue gas simultaneously can also collect, and returns to desulfurizing tower and recycles.
For completing above-mentioned utility model invention task, the utility model is achieved in that a kind of bootstrap system of desulfurization fume dehumidifying, and it comprises boiler, desulfurizing tower, chimney, condenser, cooling tower; Described boiler, desulfurizing tower, chimney connect by pipeline; Under the effect of air-introduced machine, flue gas is discharged from the burner hearth afterbody of boiler, after entering the desulfurizing tower desulfurization by flue gas pipeline, enters chimney and discharges outside chimney; It is characterized in that: the desulfurization fume exit at desulfurizing tower connects gas/water-to-water heat exchanger, and the exhanst gas outlet of described desulfurizing tower is connected to the smoke inlet of gas/water-to-water heat exchanger, and the exhanst gas outlet of gas/water-to-water heat exchanger is connected to the mouth that advances of chimney; Gas/water-to-water heat exchanger water inlet connects outside cold water, and the delivery port of gas/water-to-water heat exchanger connects hot-water cylinder or needs the application places of hot water.Described gas/water-to-water heat exchanger can be dividing wall type heat exchanger, can be also direct-contact heat exchanger.This patent from designing in the past different is, design in the past thinking is put into desulfurizing tower before, reclaim the fume afterheat that enters desulfurizing tower with heat exchanger, be used for to the clean flue gas after desulfurization.Because before desulfurization, the temperature of its flue gas is very high, can reach more than 140 ℃.After flue gas entered desulfurizing tower, through a series of technical process such as spray washing, out cigarette temperature significantly reduced from desulfurizing tower, generally 50 ℃ of left and right.Wet desulphurization can be regarded an equal-enthalpy humidifying process as, and the clean flue gas after desulfurization is saturated wet flue gas, and water content is very large, if at this moment directly discharge, have white smoke on chimney and occur, in fact, that is not dust, but the water vapour in flue gas runs into the water smoke that forms after cold air; After the discharging, problem is a lot of like this, our by the agency of in technical background.The method that this patent adopts is, adopt cooling and dehumidifying to process to the saturated wet flue gas after desulfurization, to enter chimney clean flue gas before with gas/water-to-water heat exchanger carries out cooling, because temperature reduces, the moisture in flue gas can be separated out in a large number, can obtain a lot of benefits like this, one, reclaimed the waste heat in clean flue gas, the cooling water that enters heat exchanger has been heated, for production technology provides hot water; Two, reduced the water capacity of flue gas, can reduce the wet chimney problem that causes due to the moisture in flue gas on the one hand, can also reduce on the other hand the consumption of the air-introduced machine power of smoke evacuation, this is because because separating out of moisture can cause the corresponding minimizing of exhaust smoke level, flue-gas temperature reduces simultaneously, and the smoke evacuation volume flow also can reduce; Three, the condensed water of separating out in flue gas can also collect and return to desulfurizing tower and recycle.
Said system is done further to limit, and described gas/water-to-water heat exchanger can one uses separately, also can use or in parallel, tandem compound use with many parallel connections or series connection, how to configure to be determined on a case-by-case basis.Described gas/water-to-water heat exchanger can be two fluid heat exchanger, at this moment only has a kind of cooling fluid in heat exchanger, also can be multithread body heat exchanger, and in heat exchanger, stream has two or more separate cooling fluid, how to use to be determined on a case-by-case basis.Described gas/water-to-water heat exchanger is provided with condensate water recovery device, and the condensed water of recovery returns desulfurizing tower and recycles.Connect a branch line on described turbine condenser coolant outlet pipeline, the import of the cooling line of described gas/water-to-water heat exchanger connects this branch line, the delivery port of gas/water-to-water heat exchanger connects hot-water cylinder or needs the application places of hot water, from water factory come clear water as a supplement water enter the condenser cooling tower.Connect a branch line on described turbine condenser coolant outlet pipeline, the import of the cooling line of described gas/water-to-water heat exchanger connects this branch line, and the delivery port of gas/water-to-water heat exchanger connects the cooling tower inlet pipeline or directly enters cooling tower.The import of the cooling line of described gas/water-to-water heat exchanger connects clear water factory or desalination water factory's intake pipe road, the delivery port of gas/water-to-water heat exchanger connects clear water factory or desalination water factory inlet pipeline, enters water factory after pending like this water first self is heated simultaneously by the heat exchanger cooled flue gas again and processes.The import of the cooling line of described gas/water-to-water heat exchanger connects the turbine condenser condensed water, the delivery port of gas/water-to-water heat exchanger connects boiler heating power circulation heat recovery pipeline, steam condensate (SC) first by the heat exchanger cooled flue gas, enters in boiler heating power circulation heat recovery pipeline after self being heated simultaneously more like this.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation that then the first cooling and dehumidifying of desulfurization fume heats.
The specific embodiment
For further description characteristics of the present utility model and advantage, below in conjunction with accompanying drawing of the present utility model, do further description.
As shown in the figure, a kind of bootstrap system of desulfurization fume dehumidifying, it comprises boiler, desulfurizing tower, chimney, gas trap, cooling tower; Described boiler, desulfurizing tower, chimney connect by pipeline; Under the effect of air-introduced machine 2, flue gas is discharged from the burner hearth afterbody 1 of boiler, by flue gas pipeline desulfurizing tower 3 desulfurization of flowing through, after demister 4 anhydrates, enters chimney and discharges outside chimney; At the desulfurization fume exit installation gas/water-to-water heat exchanger 5 of desulfurizing tower, the desulfurization fume outlet of described desulfurizing tower is connected to the smoke inlet of gas/water-to-water heat exchanger, and the exhanst gas outlet of gas/water-to-water heat exchanger is connected to the mouth that advances of chimney 8; Gas/water-to-water heat exchanger water inlet 6 connects outside cold water, and gas/water-to-water heat exchanger delivery port 7 is connected to the hot water application places.Described gas/water-to-water heat exchanger can one uses separately, also can use or in parallel, tandem compound use with many parallel connections or series connection, described gas/water-to-water heat exchanger can be two fluid heat exchanger, at this moment only has a kind of cooling fluid in heat exchanger, also can be multithread body heat exchanger, in heat exchanger, stream has two or more separate cooling fluid, is determined on a case-by-case basis.Above-mentioned cooling water can be also that the cold water of different purposes comes clear water as water factory from different places, boiler feedwater, etc., the delivery port of gas/water-to-water heat exchanger connects hot-water cylinder or needs the application places of hot water.Described gas/water-to-water heat exchanger is provided with condensed-water recovering device, and the condensed water of recovery returns to desulfurizing tower and recycles; Can be passed through a flue gas heater 9 by the flue gas after heat exchange, deliver at last chimney 8, this flue gas heater is also a heat exchanger, its utilization be that the hot flue gas that enters before desulfurizing tower is completed.
the self-contained thermoelectric plant of industrial enterprise, enterprises in pulp and paper industry or printing and dyeing enterprise that particularly water consumption is larger, the industrial enterprise of its service is except needs electric power and steam, generally also need consume a large amount of hot water, and these hot water are all often to get with Steam Heating, also useful waste-heat recovery device recovery waste heat feed water the heating, as enterprises in pulp and paper industry, just need to consume a large amount of hot water, these hot water have steam heated, also there is recovery vapour cover air exhaust waste heat to heat, adopt Steam Heating, can consume a large amount of valuable steam, reclaim vapour cover air exhaust waste heat, also need to invest huge waste heat return device, simultaneously must consume a large amount of operating costs.If the employing the technical program, first by described gas/water-to-water heat exchanger, to the flue gas cool-down dehumidifying, self obtains temperature increase simultaneously, then enters paper plant for process system, achieves many things at one stroke with clear water.Because the enterprises in pulp and paper industry hot water demand measures hugely, it fully can complete independently flue gas cool-down dehumidifying task, and in this case, economic benefit is very remarkable.The utility model patent is except the application of pulping and papermaking industry, and other is as also fully applicable in industries such as printing and dyeing, chemical industry, self-contained thermoelectric plants.Below we describe as an example of paper mill, China Yangtze River Delta Area example:
Approximately 240 tons/hour of this paper plant's paper machine production capacities, approximately 1,600,000 tons of annual productions, ton paper hot water consumption is 5.5 tons, and approximately 450 tons/hour of need consumption low-pressure steams are joined two 400 tons of CFBBs and two 100MW steam turbine generators provide steam and electric power for power plant.Boiler per hour coal-fired consumption is 96 tons, coal-fired sulfur content 0.6%, and water content 15%, before desulfurization, the smoke evacuation total amount of boiler is 816.4 tons/hour, 140 ℃ of flue-gas temperatures, water capacity 60.7g/kg dry flue gas.After the desulfurizing tower wet desulphurization, flue-gas temperature drops to 50 ℃, and water capacity increases to the 86.2g/kg dry flue gas, and total exhaust gas volumn is 860 tons/hour.After adopting described cool-down dehumidification technology, flue-gas temperature drops to 32 ℃, the corresponding 30.6 g/kg dry flue gas that are reduced to of water capacity, and the condensation water quantity that per hour reclaims from flue gas is 43.9 tons.Simultaneously, the cold water of 1370 tons/hour can also be heated to 40 ℃ from 17 ℃, the waste heat of recovery is equivalent to per hour can to save 55.4 tons of the low-pressure steams that pressure is 7bar.Consider flue gas through after cool-down dehumidification, the flue gas quality reduces, and therefore smaller volume can also reduce approximately 120kW of smoke exhaust fan power consumption.Except the series of problems that the wet chimney of remarkable improvement brings, economic benefit is also very remarkable, presses 40 yuan/tons of steam prices, 2 yuan/tons, water, and 0.62 yuan/degree of electricity calculates, and annual economic benefit is up to more than 2,000 ten thousand yuan.
Claims (9)
1. the bootstrap system of desulfurization fume dehumidifying, it comprises boiler, desulfurizing tower, chimney, condenser, cooling tower; Described boiler, desulfurizing tower, chimney connect by flue gas pipeline; Under the effect of air-introduced machine, flue gas is discharged from the burner hearth afterbody of boiler, flows through after the desulfurizing tower desulfurization by flue gas pipeline, enters chimney and discharges outside chimney; It is characterized in that: at the desulfurization fume exit installation gas/water-to-water heat exchanger of desulfurizing tower, the desulfurization fume outlet of described desulfurizing tower is connected to the smoke inlet of gas/water-to-water heat exchanger, and the exhanst gas outlet of gas/water-to-water heat exchanger is connected to the mouth that advances of chimney; Gas/water-to-water heat exchanger water inlet connects outside cold water, and delivery port meets the hot water storage tank or needs the application places of hot water.
2. the bootstrap system of a kind of desulfurization fume dehumidifying according to claim 1, it is characterized in that: described gas/water-to-water heat exchanger can be dividing wall type heat exchanger, can be also direct-contact heat exchanger.
3. the bootstrap system of a kind of desulfurization fume dehumidifying according to claim 1 is characterized in that: described gas/water-to-water heat exchanger can one, also can be with many parallel connections or serial or parallel connection, tandem compound.
4. the bootstrap system of a kind of desulfurization fume dehumidifying according to claim 1, it is characterized in that: described gas/water-to-water heat exchanger can be two fluid heat exchanger, also can be multithread body heat exchanger, in heat exchanger, stream has two or more separate cooling fluid.
5. the bootstrap system of a kind of desulfurization fume dehumidifying according to claim 1, it is characterized in that: described gas/water-to-water heat exchanger is provided with condensate water recovery device, and the condensed water of recovery returns desulfurizing tower and recycles.
6. the bootstrap system of according to claim 1,2 or 3 described a kind of desulfurization fumes dehumidifying, it is characterized in that: connect a branch line on described turbine condenser coolant outlet pipeline, the import of the cooling line of described gas/water-to-water heat exchanger connects this branch line, the delivery port of gas/water-to-water heat exchanger connects hot-water cylinder or needs the application places of hot water, from water factory come clear water as a supplement water enter the condenser cooling tower.
7. the bootstrap system of according to claim 1,2 or 3 described a kind of desulfurization fumes dehumidifying, it is characterized in that: connect a branch line on described turbine condenser coolant outlet pipeline, the import of the cooling line of described gas/water-to-water heat exchanger connects this branch line, and the delivery port of gas/water-to-water heat exchanger connects the cooling tower inlet pipeline or directly enters cooling tower.
8. the bootstrap system of according to claim 2 or 3 described a kind of desulfurization fumes dehumidifying, it is characterized in that: the import of the cooling line of described gas/water-to-water heat exchanger connects clear water factory or desalination water factory's intake pipe road, and the delivery port of gas/water-to-water heat exchanger connects clear water factory or desalination water factory inlet pipeline.
9. the bootstrap system of according to claim 2 or 3 described a kind of desulfurization fumes dehumidifying, it is characterized in that: the import of the cooling line of described gas/water-to-water heat exchanger connects the turbine condenser condensed water, and the delivery port of gas/water-to-water heat exchanger connects boiler heating power circulation heat recovery pipeline.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103691259A (en) * | 2013-12-11 | 2014-04-02 | 北京中能诺泰节能环保技术有限责任公司 | Energy-saving and water-saving purification system for processing smoke by using wet process and energy-saving and water-saving purification process |
| CN104226073A (en) * | 2013-06-13 | 2014-12-24 | 烟台龙源电力技术股份有限公司 | Demisting dedusting device for flue gas treatment and flue gas demisting dedusting system |
| CN104235864A (en) * | 2013-06-13 | 2014-12-24 | 烟台龙源电力技术股份有限公司 | Flue gas moisture recovery system and method |
| CN104990096A (en) * | 2015-07-17 | 2015-10-21 | 福建德兴节能科技有限公司 | Low-energy-consumption management method for chimney white smoke |
| CN104998512A (en) * | 2015-07-09 | 2015-10-28 | 西安交通大学 | System for recovering water in high-humidity flue gas by contact-type circulating heat exchange and removing PM2.5 at the same time |
| CN106369623A (en) * | 2016-11-29 | 2017-02-01 | 冯伟忠 | System for removing smoke plumes through condensation, emission reduction, water collecting, heating and drying |
| CN107875800A (en) * | 2017-12-07 | 2018-04-06 | 天津华赛尔传热设备有限公司 | The flue gas to dehumidify outside a kind of tower disappears white system |
| CN109059025A (en) * | 2018-07-23 | 2018-12-21 | 浙江巨化热电有限公司 | A kind of smoke comprehensive processing unit and its method |
| CN110645587A (en) * | 2019-11-01 | 2020-01-03 | 浙江城建煤气热电设计院有限公司 | Flue gas takes off white device condensate waste heat recovery and utilizes system |
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2012
- 2012-10-30 CN CN2012205621688U patent/CN202927864U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226073A (en) * | 2013-06-13 | 2014-12-24 | 烟台龙源电力技术股份有限公司 | Demisting dedusting device for flue gas treatment and flue gas demisting dedusting system |
| CN104235864A (en) * | 2013-06-13 | 2014-12-24 | 烟台龙源电力技术股份有限公司 | Flue gas moisture recovery system and method |
| CN103691259A (en) * | 2013-12-11 | 2014-04-02 | 北京中能诺泰节能环保技术有限责任公司 | Energy-saving and water-saving purification system for processing smoke by using wet process and energy-saving and water-saving purification process |
| CN104998512A (en) * | 2015-07-09 | 2015-10-28 | 西安交通大学 | System for recovering water in high-humidity flue gas by contact-type circulating heat exchange and removing PM2.5 at the same time |
| CN104990096A (en) * | 2015-07-17 | 2015-10-21 | 福建德兴节能科技有限公司 | Low-energy-consumption management method for chimney white smoke |
| CN106369623A (en) * | 2016-11-29 | 2017-02-01 | 冯伟忠 | System for removing smoke plumes through condensation, emission reduction, water collecting, heating and drying |
| CN107875800A (en) * | 2017-12-07 | 2018-04-06 | 天津华赛尔传热设备有限公司 | The flue gas to dehumidify outside a kind of tower disappears white system |
| CN109059025A (en) * | 2018-07-23 | 2018-12-21 | 浙江巨化热电有限公司 | A kind of smoke comprehensive processing unit and its method |
| CN110645587A (en) * | 2019-11-01 | 2020-01-03 | 浙江城建煤气热电设计院有限公司 | Flue gas takes off white device condensate waste heat recovery and utilizes system |
| CN110645587B (en) * | 2019-11-01 | 2023-11-17 | 浙江城建煤气热电设计院有限公司 | Condensate water waste heat recycling system of flue gas whitening device |
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Effective date of registration: 20160329 Address after: The new town of Shanghai city Chongming County 202156 new Shanghai 921 Lane Road, No. 2 O District 141 room (Fusheng Shanghai Economic Development Zone) Patentee after: Shanghai paper energy saving environmental protection science and Technology Co Ltd Address before: 436000 Ezhou city of Hubei Province, the city of Hubei Echeng district 15 building 101 train station Patentee before: Ye Xiaoqing Patentee before: He Jiangning |
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| CU03 | Correction of utility model patent gazette |
Correction item: Patentee|Address Correct: Shanghai paper energy saving environmental protection science and Technology Co Ltd|The new town of Shanghai city Chongming County 202156 new Shanghai 921 Lane Road, No. 2 O District 141 room (Fusheng Shanghai Economic Development Zone) False: Shanghai paper wind energy saving environmental protection science and Technology Co Ltd|The new town of Shanghai city Chongming County 202156 new Shanghai 921 Lane Road, No. 2 O District 141 room (Fusheng Shanghai Economic Development Zone) Number: 16 Volume: 32 |
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| CU03 | Correction of utility model patent gazette | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20201030 |
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| CF01 | Termination of patent right due to non-payment of annual fee |