CN102384680A - Device for recovering and utilizing waste heat generated by smoke discharging in split type heating medium circulating way - Google Patents
Device for recovering and utilizing waste heat generated by smoke discharging in split type heating medium circulating way Download PDFInfo
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- CN102384680A CN102384680A CN2011103263560A CN201110326356A CN102384680A CN 102384680 A CN102384680 A CN 102384680A CN 2011103263560 A CN2011103263560 A CN 2011103263560A CN 201110326356 A CN201110326356 A CN 201110326356A CN 102384680 A CN102384680 A CN 102384680A
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention discloses a device for recovering and utilizing waste heat generated by smoke discharging in a split type heating medium circulating way, which comprises a heat absorbing and exchanging device, a heat releasing and exchanging device, and a connection pipeline and a circulation pump filled with heating medium heat conduction liquid, and is characterized in that low-temperature heat conduction oil is adopted as the heating medium heat conduction liquid, is used for absorbing the waste heat of the smoke in an exit flue, is delivered to the heat releasing and exchanging device through the connection pipeline after absorbing the waste heat, and is delivered to gas media needing the waste heat by the heat releasing and exchanging device, thereby recovering and utilizing the waste heat; and the heat absorbing and exchanging device and the heat releasing and exchanging device are tube type heat exchangers adopting oval tube H-shaped fin heat pipes. Heat conduction oil is used as the heating media to replace water, so that the device is applicable to cold regions, the temperature of which ranges from minus 30 DEG C to minus 50 DEG C, is not solidified when equipment is stopped for overhaul, and does not need to be heated additionally; and by adopting the tube type heat exchanger adopting the oval tube H-shaped fin heat pipe, the flow resistance at a smoke or gas side is small, the energy consumption is low, and the self-deashing effect is better, thereby preventing a smoke channel from being blocked.
Description
Technical field
The present invention relates to the energy conserving system that a kind of smoke discharging residual heat is recycled, be specifically related to a kind of split type heating agent circular form smoke discharging residual heat and reclaim and use device.
Background technology
All kinds of station boilers of generation current industry; The all types of industries boiler of using in the industry; The flue gas row who carries a large amount of considerable waste heats is all arranged to atmosphere the every days such as all kinds of oven dry stoves of blast furnace air stove, coking coal stove and the building material industry and the textile industry of metallurgical steel-making industry, the energy loss that causes is extremely serious.As for large-scale bituminous coal fired boiler unit, the exhaust gas temperature design load is generally about 125 ℃; For meager coal and anthracite-fired boiler unit, the exhaust gas temperature design load is generally about 140 ℃; For high-moisture boiler using brown coal unit, the exhaust gas temperature design load often up to 150 ℃ about.In the boiler actual motion, owing to aspects such as ature of coal variation, heating surface contamination dust stratification, boiler leak out, actual exhaust gas temperature often is higher than these design loads.In recent years, People more and more is noticed the recyclable utilization of a large amount of waste heats of carrying in these smoke evacuations, produces huge economic and social benefit.Like the coal-fired unit for 600MW, year running time, the annual operating load if can reduce by 20 ℃ with exhaust gas temperature through waste heat recovery by 75% by 7000 hours, and then annual recyclable waste heat reaches 3.52 * 10 approximately
11KJ is converted into mark coal about 12000t/Y, reclaiming these waste heats certainly is to pay certain cost, consumes certain energy.And for example the large-scale building materials of building trade are dried stove, and row accounts for whole oven dry with 60% of heat to the flue gas heat of atmosphere, and the energy dissipation that causes very seriously.Because smoke discharging residual heat reclaims and utilizes and have a large capacity and a wide range, overall energy-saving effect is very huge.
There are the deficiency of two aspects in existing both at home and abroad split type heating agent circular form smoke discharging residual heat recovery and use device; One heating agent that is to use is a water; At north cold area, water can freeze or move not the frozen plug of water meeting at that time pipeline at equipment when equipment is stopped transport maintenance; Next is that the used heat-transfer pipe major part of heat exchanger is a pipe spiral fin heat-transfer pipe, sees Fig. 2.The smoke discharging residual heat that is used for dust-laden reclaim and not only tie ash when utilizing, fouling is serious, and resistance is big, the power consumption that consumes blower fan is big, the operating cost of waste heat recovery increases, and makes energy-saving benefit reduce.
Summary of the invention:
The object of the invention is in order to overcome the deficiency that existing split type heating agent circular form smoke discharging residual heat reclaims and use device exists; Provide a kind of northern area in cold to move and easy to maintenance, the split type heating agent circular form smoke discharging residual heat of the novelty that reliability is high reclaims and use device.
For achieving the above object; The technical scheme that the present invention adopts is: a kind of split type heating agent circular form smoke discharging residual heat reclaims and use device; Comprise the heat absorption heat exchanger that is arranged in the exit flue side, the heat release heat exchanger that is arranged in the UTILIZATION OF VESIDUAL HEAT IN side, the connection pipeline and the circulating pump that charge the thermal medium heat-conducting liquid; It is characterized in that; Said thermal medium heat-conducting liquid is a kind of organic heat-carrying media low temperature conduction oil; The fume afterheat of organic heat-carrying media low temperature conduction oil in heat absorption absorbs all kinds of oven dry stove exit flues of blast furnace, coking coal stove, building material industry and textile industry of station boiler, Industrial Boiler, smelting industry in the heat exchanger; The organic heat-carrying media low temperature conduction oil that has absorbed waste heat is transported to the heat release heat exchanger through connecting pipeline, passes to the gas medium that need utilize waste heat through the heat release heat exchanger, has realized the recovery and the utilization of waste heat; Described heat absorption heat exchanger and heat release heat exchanger are tubular heat exchanger, and said tubular heat exchanger adopts elliptical tube H type fin heat transfer pipe, and the parent tube of described elliptical tube H type fin heat transfer pipe is an elliptical tube, is equipped with the H type fin of inlaying welding on the elliptical tube.
The heating agent that is adopted in the present invention is international, domestic low temperature conduction oil commonly used, this type of conduction oil except that have Heat stability is good, nontoxic, odorless, pollution-free, equipment and feed-line are not had the corrosion, its thermal conductivity factor is big, specific heat is big, the thermal efficiency is high and conduction oil when temperature increases; Outside the advantages such as the pressure build-up rate is little, and evaporation loss is few, and is good in economic efficiency; Still do not solidify when especially being low to moderate-30 ℃ ~-50 ℃ in temperature; And cryogenic property is good, viscosity is low, flow resistance is little, is specially adapted to cold northern area, when equipment is stopped transport maintenance, does not solidify; Without any need for additional heating, oil pump as usual can start cycles; Obstruction at equipment operation also can not causing at that time pipeline.Heat absorption heat exchanger and heat release heat exchanger among the present invention are tubular heat exchanger; The heat-transfer pipe that wherein adopts is an elliptical tube H type fin heat transfer pipe; Its advantage is: the flow resistance of (1) flue gas or gas side is little, and energy consumption is low, under identical condition of work; The flow resistance in elliptical tube H type fin heat transfer pipe pipe outside pipe spiral fin heat-transfer pipe more commonly used will reduce about 30～50%, and heat exchange area and heat can increase 10～15%.(2) when smoke evacuation is the flue gas of dust-laden; Under identical condition of work; The pipe spiral fin heat-transfer pipe that the wear-out life of elliptical tube H type fin heat transfer pipe is more commonly used will exceed 2～3 times; And,, avoided the obstruction of exhaust gases passes so have preferably from ash-removal effect because H type fin when gas flows through slight self-excited oscillation can take place.
Description of drawings
Fig. 1 is that split type heating agent circular form smoke discharging residual heat reclaims and the use device principle schematic;
Fig. 2 is that pipe spiral fin heat-transfer pipe is arranged sketch map;
Fig. 3 is that elliptical tube H type fin heat transfer pipe is arranged sketch map;
Fig. 4 is used as the tubular type GGH sketch map in the limestone-gypsum wet type desulfurizing system for the present invention;
Fig. 5 is an elliptical tube H type fin heat transfer tubular construction sketch map;
Fig. 6 comes the warm-up combustion-supporting air schematic diagram for the present invention utilizes the boiler exhaust gas waste heat;
Fig. 7 is used for the combustion gas schematic diagram that preheating gets into stove for the present invention.
The specific embodiment
In conjunction with accompanying drawing the present invention is described further; A kind of split type heating agent circular form smoke discharging residual heat reclaims and use device; By shown in Figure 1; Comprise the heat absorption heat exchanger 1 that is arranged in the exit flue side, the heat release heat exchanger 2 that is arranged in the UTILIZATION OF VESIDUAL HEAT IN side, the connection pipeline 3 that charges the thermal medium heat-conducting liquid and circulating pump 4; It is characterized in that said thermal medium heat-conducting liquid is a kind of organic heat-carrying media low temperature conduction oil, like the Tetralin conduction oil of L-65 low temperature conduction oil, Great Wall board L-QB320 conduction oil, Dupont (Du Pont) company, the Therm S200 heat conduction wet goods of company of Japanese Nippon Steel (Nippon Steel).The fume afterheat of organic heat-carrying media low temperature conduction oil in heat absorption absorbs all kinds of oven dry stove exit flues of blast furnace, coking coal stove, building material industry and textile industry of station boiler, Industrial Boiler, smelting industry in the heat exchanger; The organic heat-carrying media low temperature conduction oil that has absorbed waste heat is transported to the heat release heat exchanger through connecting pipeline; Pass to the gas medium that need utilize waste heat through the heat release heat exchanger, realized the recovery and the utilization of waste heat; Described heat absorption heat exchanger and heat release heat exchanger are tubular heat exchanger; Said tubular heat exchanger adopts elliptical tube H type fin heat transfer pipe; By Fig. 3, shown in Figure 5, the parent tube of described elliptical tube H type fin heat transfer pipe is an elliptical tube 9, is equipped with the H type fin 10 of inlaying welding on the elliptical tube.
In smoke limestone-gypsum wet type desulfurizing system, be used as tubular type flue gas-clean flue gas heat exchange device (tubular type GGH).The sulfur removal technology the most widely that present large-scale coal fired power plant uses is a limestone-gypsum wet type desulfurizing technology; Require the flue gas operating temperature on absorption tower to be generally about 80 ℃ in this technology and (be not higher than 95 ℃); And the clean flue-gas temperature behind the desulfurizing and purifying is generally about 45～50 ℃; So flue gas-clean flue gas heat exchange device (GGH) all is set in this technology usually; In GGH, will advance on the one hand the unprocessed flue gas on absorption tower and reduce to about 90 ℃ by 120～130 ℃, send into chimney after will about the clean flue gas after washing desulphurization, the demist is by 50 ℃, being heated to 80 ℃ again on the other hand to enter atmosphere.
The present invention can be used as the tubular type GGH in the limestone-gypsum wet type desulfurizing system, in the present embodiment, comprises heat absorption heat exchanger 1, heat release heat exchanger 2 and connects that to dash what irritate in the pipeline 3 be organic heat-carrying media low temperature conduction oil.The gas cooler that heat absorption heat exchanger 1 of the present invention is used as among the tubular type GGH is placed in the flue between booster fan 7 outlets and absorption tower 5 imports; Absorb the waste heat of smoke evacuation through organic heat-carrying media low temperature conduction oil, send into absorption tower 5 after making the cigarette temperature be reduced to about 90 ℃ by about 125 ℃; The smoke re-heater that heat release heat exchanger 2 of the present invention is used as among the tubular type GGH is placed in the flue between absorption tower 5 outlets and chimney 6 imports; Organic heat-carrying media low temperature conduction oil that circulating pump 4 will absorb smoke discharging residual heat is transported to heat release heat exchanger 2; In order to heat clean flue gas; Clean flue gas is heated to by about 50 ℃ enters chimney 6 about 80 ℃, see Fig. 4.
Owing to use when the present invention is used as the tubular type GGH (1,2) in the limestone-gypsum wet type desulfurizing system is organic heat-carrying media low temperature conduction oil; Even make when northern China cold district environment temperature is low to moderate-30 ℃ ~-50 ℃;, equipment can not solidify when stopping transport maintenance yet; Without any need for additional heating, circulating pump 4 as usual can start cycles; Obstruction at equipment operation also can not causing at that time pipeline.
Secondly in the present embodiment, heat absorption heat exchanger 1 is based on the elliptical tube H type fin heat transfer pipe (number of patent application: 201010022469.7), see Fig. 3, Fig. 5 that the applicant researches and develops voluntarily with the heat-transfer pipe 8 that heat release heat exchanger 2 uses.It is to be made up of parent tube 9 and fin group 10; Parent tube 9 cross sections are oval; Each fin group 10 is two rectangle steel discs; Having and the consistent elliptic arc breach of parent tube 9 shapes with one side that oval parent tube 9 is inlayed in the middle of every steel disc, two rectangle steel discs of each fin group 10 are inlayed with oval parent tube 9 symmetrically and are welded together; Whenever lay another group fin group 10 at a distance from 10～30 millimeters spacings by above-mentioned identical mode along parent tube 9 length directions,, promptly form the heat-transfer pipe 8 that the present invention uses until being covered with whole foundation pipe 9.
Be characterized in: the flow resistance of (1) flue gas or gas side is little; Energy consumption is low; Under identical condition of work; The flow resistance pipe spiral fin heat-transfer pipe more commonly used in the elliptical tube H type fin heat transfer pipe 8 pipe outsides will reduce about 30～50%, and heat exchange area and heat can increase 10～15%.(2) when smoke evacuation is the flue gas of dust-laden; Under identical condition of work; The pipe spiral fin heat-transfer pipe that the wear-out life of elliptical tube H type fin heat transfer pipe 8 is more commonly used will exceed 2～3 times; And,, avoided the obstruction of exhaust gases passes so have preferably from ash-removal effect because H type fin group 10 when gas flows through slight self-excited oscillation can take place.
In a word; Patent of the present invention has characteristics such as the flow resistance of the time between overhauls(TBO) length that is difficult for that knot is grey, less scaling, corrosion is light, equipment is stopped transport, flue gas or gas side is little during as the tubular type GGH (1,2) in the limestone-gypsum wet type desulfurizing system; These characteristics can significantly reduce the operating cost of tubular type GGH (1,2), improves the economic benefit of limestone-gypsum wet type desulfurizing system.And be used for the northern China cold district, and even when environment temperature is low to moderate-30 ℃ ~-50 ℃, organic heat-carrying media low temperature conduction oil can not solidify yet, without any need for additional heating, circulating pump 4 as usual can start cycles, brings safety and convenient for the maintenance of stopping transport.Even move the obstruction that also can not cause pipeline at that time at equipment in addition.
Heat release heat exchanger 2 of the present invention is used for combustion air that preheating gets into boiler to replace steam air heater.
Heat absorption heat exchanger 1 of the present invention is placed in the boiler exhaust gas flue to absorb the waste heat of smoke evacuation, heat release heat exchanger 2 of the present invention is placed on boiler steam air heater place, the waste heat that absorbs is used for preheating gets into the combustion air of boiler, replace steam air heater.Conventional steam air heater need utilize the Steam Heating combustion air, has caused the remarkable increase of unit coal consumption thus.Because the cycling hot media is the low temperature conduction oil among the present invention, even, when environment temperature is low to moderate-30 ℃ ~-50 ℃, still can guarantee trouble free service at the northern area of cold.In a word,, consider that using patent of the present invention is best selection in utilizing the boiler exhaust gas waste heat to come warm-up combustion-supporting air, sees Fig. 6 from safety and economic two aspects at north cold area.
Heat release heat exchanger of the present invention is used for the combustion gas (natural gas or liquefied petroleum gas etc.) of preheated fuel gas stove.
Heat absorption heat exchanger 1 of the present invention is placed in the exit flue of stove to absorb the waste heat of smoke evacuation; Heat release heat exchanger 2 of the present invention is placed in the steam line of stove, the waste heat that absorbs is used for the combustion gas (natural gas or liquefied petroleum gas etc.) that preheating gets into stove.The combustion gas of conventional combustion gas stove is a direct supply type, has caused the remarkable increase of unit energy consumption thus.Consider from economic aspect, utilize the smoke discharging residual heat of stove to come preheated fuel gas can obtain tangible economic benefit, see Fig. 7,11 are the combustion gas stove among the figure, and 12 is expansion tank.
Claims (1)
1. a split type heating agent circular form smoke discharging residual heat reclaims and use device, comprises the row of being arranged in
The heat absorption heat exchanger (1) of cigarette flue side, the heat release heat exchanger (2) that is arranged in the UTILIZATION OF VESIDUAL HEAT IN side, the connection pipeline (3) that charges the thermal medium heat-conducting liquid and circulating pump (4); It is characterized in that; Said thermal medium heat-conducting liquid is a kind of organic heat-carrying media low temperature conduction oil; Fume afterheat in all kinds of oven dry stove exit flues of organic heat-carrying media low temperature conduction oil blast furnace, coking coal stove, building material industry and textile industry of absorption station boiler, Industrial Boiler, smelting industry in heat absorption heat exchanger (1); The organic heat-carrying media low temperature conduction oil that has absorbed waste heat is transported to heat release heat exchanger (2) through connecting pipeline (3); Pass to the gas medium that need utilize waste heat through heat release heat exchanger (2), realized the recovery and the utilization of waste heat; Described heat absorption heat exchanger (1) and heat release heat exchanger (2) are tubular heat exchanger; Said tubular heat exchanger adopts elliptical tube H type fin heat transfer pipe; The parent tube of described elliptical tube H type fin heat transfer pipe is an elliptical tube, is equipped with the H type fin of inlaying welding on the elliptical tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103263560A CN102384680A (en) | 2011-10-25 | 2011-10-25 | Device for recovering and utilizing waste heat generated by smoke discharging in split type heating medium circulating way |
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| CN2011103263560A CN102384680A (en) | 2011-10-25 | 2011-10-25 | Device for recovering and utilizing waste heat generated by smoke discharging in split type heating medium circulating way |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705863A (en) * | 2012-06-15 | 2012-10-03 | 黄绍新 | Boiler and air preheating system thereof |
| CN103322831A (en) * | 2013-06-18 | 2013-09-25 | 重庆海洲化学品有限公司 | Method for producing hot gas by using conduction oil waste heat |
| CN106066133A (en) * | 2016-06-22 | 2016-11-02 | 上海和衡能源科技发展有限公司 | Single-tube fin type heat exchanger and assembling thereof |
| CN106090973A (en) * | 2016-06-22 | 2016-11-09 | 上海和衡能源科技发展有限公司 | Smoke processing system and method |
| CN106090878A (en) * | 2016-06-22 | 2016-11-09 | 上海和衡能源科技发展有限公司 | Two-tube fin-type heat exchanger and assembling thereof |
| CN107023852A (en) * | 2016-07-11 | 2017-08-08 | 胡建廷 | Transfiguration mapping heating agent flue gas/air heat-exchanging device |
| CN110973681A (en) * | 2019-11-30 | 2020-04-10 | 云南省烟草农业科学研究院 | Device for automatically disturbing flue gas inside heat dissipation pipe of bulk curing barn for heat dissipation and ash removal |
| CN111850315A (en) * | 2020-07-30 | 2020-10-30 | 贵溪三元金属有限公司 | Reduction smelting blast furnace for copper-containing waste |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705863A (en) * | 2012-06-15 | 2012-10-03 | 黄绍新 | Boiler and air preheating system thereof |
| CN103322831A (en) * | 2013-06-18 | 2013-09-25 | 重庆海洲化学品有限公司 | Method for producing hot gas by using conduction oil waste heat |
| CN106066133A (en) * | 2016-06-22 | 2016-11-02 | 上海和衡能源科技发展有限公司 | Single-tube fin type heat exchanger and assembling thereof |
| CN106090973A (en) * | 2016-06-22 | 2016-11-09 | 上海和衡能源科技发展有限公司 | Smoke processing system and method |
| CN106090878A (en) * | 2016-06-22 | 2016-11-09 | 上海和衡能源科技发展有限公司 | Two-tube fin-type heat exchanger and assembling thereof |
| CN106090973B (en) * | 2016-06-22 | 2018-04-10 | 上海和衡能源科技发展有限公司 | Smoke processing system and method |
| CN107023852A (en) * | 2016-07-11 | 2017-08-08 | 胡建廷 | Transfiguration mapping heating agent flue gas/air heat-exchanging device |
| CN110973681A (en) * | 2019-11-30 | 2020-04-10 | 云南省烟草农业科学研究院 | Device for automatically disturbing flue gas inside heat dissipation pipe of bulk curing barn for heat dissipation and ash removal |
| CN111850315A (en) * | 2020-07-30 | 2020-10-30 | 贵溪三元金属有限公司 | Reduction smelting blast furnace for copper-containing waste |
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Application publication date: 20120321 |