CN104990096A - Low-energy-consumption management method for chimney white smoke - Google Patents
Low-energy-consumption management method for chimney white smoke Download PDFInfo
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- CN104990096A CN104990096A CN201510420605.0A CN201510420605A CN104990096A CN 104990096 A CN104990096 A CN 104990096A CN 201510420605 A CN201510420605 A CN 201510420605A CN 104990096 A CN104990096 A CN 104990096A
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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
Abstract
A low-energy-consumption management method for chimney white smoke includes the steps that heat exchange devices are arranged in a smoke exhausting device in the direction in which the purified smoke is input and then output; and the white smoke is eliminated in the mode that the smoke is cooled firstly and then heated through the heat exchange devices. Heat dissipated when the smoke is firstly cooled serves as a heat source of the heat exchange device used for subsequently heating the smoke. Cooling energy generated when the smoke is subsequently heated serves as a cold source of the heat exchange device used for previously cooling the smoke. According to the method, the beneficial effect that a cooling tower has an extremely high energy efficiency ratio in the intermediate temperature field is fully utilized, and smoke treatment consumption is remarkably reduced. Meanwhile, an energy recycling inter-feedback system composed of the heat exchange devices is utilized, and accordingly cooling loads of the second heat exchange device are further reduced; and excessive heat energy recycled by the first heat exchange device can also be used for exhausting air of the cooling tower, reheating the cooling tower and eliminating the white smoke of the cooling tower.
Description
Technical field
The invention belongs to environmental protection, energy technology field, be specifically related to a kind of chimney white cigarette low energy consumption administering method.
Background technology
In the systems such as wet desulphurization, usually discharge the wet saturated flue gas of 50 DEG C.In the cooling of chimney wall, with
And under the effect of surrounding air combination cooling, supersaturation appears in flue gas, produce white cigarette phenomenon.
White cigarette not only affects environmental beauty, also comprises certain harmful components, and white cigarette problem is all paid much attention in countries in the world, and spares no high price to drop into improvement.
At present, the method solving the white cigarette of chimney is to discharged gas fume heating, reduces relative humidity, as GGH method or snead process.
Theory and practice proves, when discharged gas fume is heated to more than 100 DEG C, could thoroughly remove smoke, and GGH method can only be heated to 80 DEG C, namely existing GGH method can not eliminate white cigarette completely, and meanwhile, GGH is when recovery high-temperature flue gas heat energy, face significant corrosion problems, and produce a large amount of maintenance cost thus.And snead process faces a large amount of energy costs too.As: often process 1,000,000 cubes of wet desulfurization flue gas, about consume 200,000 tons of steam every year, with steam cost 120 yuan/ton calculating, use cost reaches 2,000 ten thousand yuan.
In other words, if the flue gas heat entering desulfurizer exists reclaim space, then this part heat not used heat, can be used for improving boiler thermal output.Namely GGH method remains the method consuming available power in essence in theory.
Therefore, need a kind of more economical, practical method and solve the white cigarette problem of chimney.
Summary of the invention
Object of the present invention, be to realize a kind of chimney white cigarette low energy consumption administering method, the technical solution adopted for the present invention to solve the technical problems is: a kind of chimney white cigarette low energy consumption administering method, it is characterized in that: the direction inputing to output along neat stress in fume extractor is provided with heat-exchanger rig, flue gas utilization heat-exchanger rig adopts the method that heats up again of first lowering the temperature to realize the elimination of white cigarette, when described flue gas is first lowered the temperature, dispersed heat to heat up the thermal source of institute's use heat-exchanger rig for flue gas as follow-up again, the energy of cooling when described follow-up flue gas heats up is as the low-temperature receiver of front and continued use to by flue gas cool-down heat-exchanger rig.
Further, described heat-exchanger rig comprises the first heat-exchanger rig, the second heat-exchanger rig, the 3rd heat-exchanger rig, and described 3rd heat-exchanger rig is connected with the first heat-exchanger rig by the circulatory system, and described second heat-exchanger rig is connected with cooling tower and EGR.
Further, described first heat-exchanger rig, the second heat-exchanger rig, the 3rd heat-exchanger rig are made up of one or more groups heat exchanger, and when described device is provided with multi-group heat exchanger, heat exchanger is arranged in parallel.
3rd heat-exchanger rig reclaim second heat-exchanger rig discharge flue gas cold for the first heat-exchanger rig to flue gas precooling, the cooling load reducing the second heat-exchanger rig, and the first heat-exchanger rig recovered flue gas heat is used for the 3rd heat-exchanger rig, adds heat smoke, reach and eliminate white cigarette object.Described first heat-exchanger rig, the second heat-exchanger rig, the 3rd heat-exchanger rig are that multi-group heat exchanger forms side by side, are conducive to comprehensive, Appropriate application energy.
Further, described first heat-exchanger rig, the second heat-exchanger rig are surface cooler, or spray chamber, or more the two combination.
First heat-exchanger rig, the second heat-exchanger rig adopt spray chamber structure, can realize the functions such as cooling, dehumidifying, auxiliary purification simultaneously.Not exclusively up to standard at processed flue gas, or when needing flue gas advanced treating, preferred spray chamber structure.
Further, described first heat-exchanger rig is connected with the air draft reheater of cooling tower by the circulatory system.
Further, the low-temperature receiver of described first heat-exchanger rig is cooling tower, or the 3rd heat-exchanger rig, or source, ground, water source, or surrounding air, or be wherein not less than the combination of 2 kinds of forms; The low-temperature receiver of described second heat exchanger is cooling tower, or the evaporimeter of refrigeration unit, or source, ground, water source, or surrounding air, or be wherein not less than the combination of 2 kinds of forms.
In conjunction with field condition, make full use of all kinds of high efficient energy sources, be conducive to the cooling load and the energy consumption that reduce the second heat-exchanger rig further, replace the second heat-exchanger rig even to a certain extent.That is, the first heat-exchanger rig and the second heat-exchanger rig are united two into one.
Further, the thermal source of described 3rd heat-exchanger rig is from the first heat-exchanger rig, or the condenser of refrigeration unit, or Boiler Steam, or electric heater unit, or is wherein not less than the combination of 2 kinds of forms.
Further, described cooling-tower circulating water is running water, or desulfurization alkaline water, or more the two combination.Under normal circumstances, recirculated water adopts running water, not exclusively up to standard in processed flue gas desulfurization, or when needing flue gas deep desulfuration, recirculated water is preferably desulfurization alkaline water.Now, adopt running water to be recirculated water further, be conducive to washing containing desulfurization alkaline water flue gas.
Further, the flue-gas temperature flowed out through described 3rd heat-exchanger rig heat exchange is less than 60 DEG C.That is, the heat mainly utilizing the first heat-exchanger rig to reclaim, in conjunction with field condition, makes full use of all kinds of high efficient energy sources, is conducive to the recovery heat and the investment that reduce the first heat-exchanger rig further, replaces the first heat-exchanger rig even to a certain extent.
Further, the flue-gas temperature flowed out through described 3rd heat-exchanger rig heat exchange is 35-45 DEG C.In southern area, under most condition, the flue-gas temperature flowed out from the 3rd heat-exchanger rig reaches 35 DEG C, can meet and eliminate white cigarette requirement.Ambient air relative humidity close to saturated or ambient air temperature lower than-20 DEG C time, then corresponding raising exhaust gas temperature, to make mixed gas water capacity unsaturated.
Compared with prior art, the present invention has following beneficial effect: thoroughly can eliminate the white cigarette of chimney, significantly reduces the white cigarette of chimney and administers energy consumption, and significantly minimizing is outer arranges harmful substance contents.To administer 1,000,000 m
3the white cigarette of/h desulfurization fume is example, and per hour only need consumes about 150kw power.Meanwhile, the flue gas heat of recovery can also be used for the white cigarette improvement of supporting cooling tower.
Accompanying drawing explanation
Fig. 1 is one of a kind of chimney of the present invention white cigarette low energy consumption administering method embodiment: low-temperature receiver is the system schematic of cooling tower;
Fig. 2 is a kind of chimney of the present invention white cigarette low energy consumption administering method embodiment two: low-temperature receiver is one of hybrid system schematic diagram of cooling tower and refrigeration unit;
Fig. 3 is a kind of chimney of the present invention white cigarette low energy consumption administering method embodiment three: low-temperature receiver is the hybrid system schematic diagram two of cooling tower and refrigeration unit;
Wherein: 1, neat stress entrance, the 2, first heat-exchanger rig, 3,3-1, the second heat-exchanger rig, 4,4-1, the 3rd heat-exchanger rig, 5, exhanst gas outlet after process, 6, crust of the device, 7, cooling tower, 8, valve, the 9, cooling tower circulating pump, 9-1, first and the 3rd heat-exchanger rig circulating pump, 9-2, refrigeration unit freeze cycle pump, 9-3, refrigeration unit coolant circulation pump, 10, refrigeration unit evaporimeter, 11, refrigeration unit condenser.
Detailed description of the invention
As Figure 1-3, neat stress self-cleaning smoke inlet 1 enters, and tentatively cools through the first heat-exchanger rig 2, dehumidifies, enter the second heat-exchanger rig 3,3-1, further cooling, dehumidifying, enter the 3rd heat-exchanger rig 4,4-1 heating, reduce relative humidity, finally discharged by the exhanst gas outlet 5 after processing.Exhanst gas outlet 5 is discharged flue-gas temperature and is less than 60 DEG C.That is, the heat that the first heat-exchanger rig reclaims mainly is utilized.Further, discharge flue-gas temperature from the exhanst gas outlet 5 after process and be preferably 35-45 DEG C.In southern area, under most condition, the flue-gas temperature flowed out through the 3rd heat-exchanger rig heat exchange reaches 35 DEG C, can meet and eliminate white cigarette requirement.Ambient air relative humidity close to saturated or ambient air temperature lower than-15 DEG C time, then corresponding raising exhaust gas temperature, to make mixed gas water capacity unsaturated.
Under normal circumstances, the second heat-exchanger rig 3 preferentially adopts spray chamber structure, is beneficial to reduce project investment and the heat transfer temperature difference eliminating surface cooler, improves system energy efficiency.
Described neat stress is the flue gas of qualified discharge after dedusting, desulfurization, and the flue gas folder foam as entered neat stress entrance 1 is serious, then should arrange pretreatment unit, as: after reducing wind speed, alkali liquid washing etc., this element accompanying drawing does not show.
Wherein: the low-temperature receiver of preliminary cooling, dehumidifying is cooling tower 7, cooling tower 7 has very high cooling efficiency and under the most of condition of cooling effect, can meet and eliminate the white cigarette target of chimney.Under normal conditions, cooling-tower circulating water adopts running water, not exclusively up to standard in processed flue gas desulfurization, or when needing flue gas deep desulfuration, recirculated water is preferably desulfurization alkaline water.
In the embodiment illustrated in figs. 1-3, recirculating cooling water system is common recirculating cooling water system, comprises necessary assembly (accompanying drawing does not show entirely).
In the embodiment illustrated in figs. 1-3, 3rd heat-exchanger rig 4, 4-1 is (as situations such as environment temperature are extremely low) where necessary, chimney outlet side can be arranged at, to prevent chimney to the undue cooling of flue gas, reduce the effect eliminating white cigarette, utilize the 3rd heat-exchanger rig 4 simultaneously, the energy dissipating effect of 4-1, the flue gas being conducive to discharging mixes rapidly with surrounding air, on the other hand, where necessary (as do not mixed rapidly with surrounding air fast because discharging flue gas, and cause the situation producing white cigarette), chimney outlet side can arrange sinker or the mixed device (accompanying drawing does not show) of speed, mix rapidly with surrounding air to realize discharging flue gas.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail:
Case study on implementation one, as shown in Figure 1, the system schematic of present case to be low-temperature receiver be cooling tower, wherein: when neat stress is by the first heat-exchanger rig 2, is tentatively reduced temperature and water capacity, then enter the second heat-exchanger rig 3, by cooling tower cooler, flue-gas temperature and water capacity reduce further, then enter the 3rd heat-exchanger rig 4 heat, reduce relative humidity after discharge, reach eliminate white cigarette object.
Wherein: first and the 3rd under heat-exchanger rig circulating pump 9-1 effect, 3rd heat-exchanger rig 4 reclaims the flue gas cold after the second heat-exchanger rig 3 cools, as the low-temperature receiver of the first heat-exchanger rig 2, and the first heat-exchanger rig 2 reclaims the heat of neat stress, as the thermal source of the 3rd heat-exchanger rig 4, meanwhile, because the first heat-exchanger rig 2 pairs of neat stress provide preliminary cooling and dehumidifying, because this reducing the cooling load of the second heat-exchanger rig 3; Due to the releasable heat of damp and hot flue gas through the first heat-exchanger rig 2, far add heat needed for heat smoke more than the 3rd heat-exchanger rig 4, now, the first heat-exchanger rig 2 outwards can export superfluous heat, for other purposes (this part accompanying drawing does not show, lower same).
Case study on implementation two, as shown in Figure 2, present case is low-temperature receiver is one of hybrid system schematic diagram of cooling tower and refrigeration unit, when neat stress is by the first heat-exchanger rig 2, cooled tower 7 tentatively reduces temperature and water capacity, enter the second heat-exchanger rig 3 again, by being connected with refrigeration unit, (this part accompanying drawing does not show, refrigeration unit evaporimeter 10 down together) provides cold to reduce temperature and water capacity further, enter the 3rd heat-exchanger rig 4 again, by being connected with refrigeration unit, (this part accompanying drawing does not show, refrigeration unit condenser 11 down together) provides heat to improve flue-gas temperature, reduce flue gas relative humidity, reach and eliminate white cigarette object.
Wherein: the heat exchange form of the first heat-exchanger rig 2, second heat-exchanger rig 3 is the surface cooler of enclosed, or the spray chamber of open type, or more the two combination (heat exchange form shown in the drawings is the surface cooler of enclosed, lower same), simultaneously, first heat-exchanger rig 2 can reclaim heat energy, outwards exports (this part accompanying drawing does not show, lower same); Usually, the heat that refrigeration unit condenser 11 exports is often beyond adding heat needed for heat smoke, and now, refrigeration unit condenser 11 outwards can export superfluous heat (this part accompanying drawing does not show, lower same).
Case study on implementation two, be applicable to input the lower situation (as: being less than the wet saturated flue gas of 40 DEG C) of neat stress temperature, now, first heat-exchanger rig 2 reclaim the temperature of heat energy, can not meet and thoroughly eliminate temperature needed for white cigarette or relative humidity, by arranging refrigeration unit, flue-gas temperature and water capacity can be reduced further, and will the temperature of flue gas be discharged, relative humidity adjusts to required requirement, because input neat stress is by the preliminary cooling of cooling tower 7, eliminate more enthalpy (when environment temperature is low, act on especially obvious), reduce refrigeration unit load, this system synthesis efficiency is still very high, reach low energy consumption and eliminate white cigarette object.
Case study on implementation three, as shown in Figure 3, the hybrid system schematic diagram two of present case to be low-temperature receiver be cooling tower and refrigeration unit, when neat stress is by the first heat-exchanger rig 2, tentatively reduced temperature and water capacity, enter the second heat-exchanger rig 3 be connected with cooling tower 7 circulating cooling system again, and the second heat-exchanger rig 3-1 to be connected with the refrigeration unit evaporimeter 10 of be connected with refrigeration unit (this part accompanying drawing does not show) combines and reduces temperature and water capacity further, enter the 3rd heat-exchanger rig 4 and 4-1 again, improve flue-gas temperature, reduce flue gas relative humidity, reach and eliminate white cigarette object.
Wherein: first and the 3rd under heat-exchanger rig circulating pump 9-1 effect, 3rd heat-exchanger rig 4 reclaims the flue gas cold after the second heat-exchanger rig 3,3-1 cooling, as the low-temperature receiver of the first heat-exchanger rig 2, and the first heat-exchanger rig 2 reclaims the heat of neat stress, as the thermal source of the 3rd heat-exchanger rig 4, second heat-exchanger rig 3-1 is connected with refrigeration unit evaporimeter 10, and the 3rd heat-exchanger rig 4-1 is connected with refrigeration unit condenser 11.
Case study on implementation three, be equally applicable to input the lower situation (as: being less than the wet saturated flue gas of 40 DEG C) of neat stress temperature, now, first heat-exchanger rig 2 reclaim the temperature of heat energy, can not meet and thoroughly eliminate temperature needed for white cigarette or relative humidity, by arranging refrigeration unit, flue-gas temperature and water capacity can be reduced further, and will the temperature of flue gas be discharged, relative humidity adjusts to required requirement, because input neat stress is by the preliminary cooling of cooling tower 7, eliminate more enthalpy (when environment temperature is low, act on especially obvious), reduce refrigeration unit load, this system synthesis efficiency is still very high, reach low energy consumption and eliminate white cigarette object.
Compare with case study on implementation two, energy consumption is lower owing to adding energy regenerating and feedback unit (being made up of the first heat-exchanger rig 2, the 3rd heat-exchanger rig the 4, first and the 3rd heat-exchanger rig circulating pump 9-1, pipeline etc.) for case study on implementation three, but investment cost is high.
The present invention can be built project and provides transformation, also can provide design for grassroot project.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. a chimney white cigarette low energy consumption administering method, it is characterized in that: the direction inputing to output along neat stress in fume extractor is provided with heat-exchanger rig, flue gas utilization heat-exchanger rig adopts the method that heats up again of first lowering the temperature to realize the elimination of white cigarette, when described flue gas is first lowered the temperature, dispersed heat to heat up the thermal source of institute's use heat-exchanger rig for flue gas as follow-up again, and the energy of cooling when described follow-up flue gas heats up is as the low-temperature receiver of front and continued use to by flue gas cool-down heat-exchanger rig.
2. a kind of chimney according to claim 1 white cigarette low energy consumption administering method, it is characterized in that: described heat-exchanger rig comprises the first heat-exchanger rig, the second heat-exchanger rig, the 3rd heat-exchanger rig, described 3rd heat-exchanger rig is connected with the first heat-exchanger rig by the circulatory system, and described second heat-exchanger rig is connected with cooling tower and EGR.
3. a kind of chimney according to claim 2 white cigarette low energy consumption administering method, it is characterized in that: described first heat-exchanger rig, the second heat-exchanger rig, the 3rd heat-exchanger rig are made up of one or more groups heat exchanger, when being provided with multi-group heat exchanger, multiple heat exchanger is arranged in parallel.
4. a kind of chimney white cigarette low energy consumption administering method according to Claims 2 or 3, is characterized in that: described first heat-exchanger rig, the second heat-exchanger rig are surface cooler, or spray chamber, or more the two combination.
5. a kind of chimney white cigarette low energy consumption administering method according to Claims 2 or 3, is characterized in that: described first heat-exchanger rig is connected with cooling tower by the circulatory system.
6. a kind of chimney white cigarette low energy consumption administering method according to Claims 2 or 3, it is characterized in that: the low-temperature receiver of described first heat-exchanger rig is cooling tower, or the 3rd heat-exchanger rig, or ground source, water source, or surrounding air, or be wherein not less than the combination of 2 kinds of forms; The low-temperature receiver of described second heat exchanger is cooling tower, or the evaporimeter of refrigeration unit, or source, ground, water source, or surrounding air, or be wherein not less than the combination of 2 kinds of forms.
7. a kind of chimney white cigarette low energy consumption administering method according to Claims 2 or 3, it is characterized in that: the thermal source of described 3rd heat-exchanger rig is from the first heat-exchanger rig, or the condenser of refrigeration unit, or Boiler Steam, or electric heater unit, or be wherein not less than the combination of 2 kinds of forms.
8. a kind of chimney white cigarette low energy consumption administering method according to claim 2,5 or 6, is characterized in that: described cooling-tower circulating water is running water, or desulfurization alkaline water, or more the two combination.
9. a kind of chimney according to claim 2 white cigarette low energy consumption administering method, is characterized in that: the flue-gas temperature flowed out through described 3rd heat-exchanger rig heat exchange is less than 60 DEG C.
10. a kind of chimney according to claim 2 white cigarette low energy consumption administering method, is characterized in that: the flue-gas temperature flowed out through described 3rd heat-exchanger rig heat exchange is 35-45 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510420605.0A CN104990096A (en) | 2015-07-17 | 2015-07-17 | Low-energy-consumption management method for chimney white smoke |
| CN202010070352.XA CN111237794A (en) | 2015-07-17 | 2015-07-17 | Low-energy-consumption treatment method for white smoke of chimney |
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| CN201510420605.0A CN104990096A (en) | 2015-07-17 | 2015-07-17 | Low-energy-consumption management method for chimney white smoke |
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| CN202010070352.XA Pending CN111237794A (en) | 2015-07-17 | 2015-07-17 | Low-energy-consumption treatment method for white smoke of chimney |
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| CN105920967A (en) * | 2016-07-15 | 2016-09-07 | 国电环境保护研究院 | Ultralow-emission, water-saving and smoke suppression synergistic advanced purification system and method thereof |
| CN106925083A (en) * | 2015-12-29 | 2017-07-07 | 天津市英派克石化工程有限公司 | A kind of improved wet desulfurizing process |
| CN107648978A (en) * | 2017-10-27 | 2018-02-02 | 中冶华天工程技术有限公司 | Wet desulfurization flue gas eliminates plume system and method |
| CN107940492A (en) * | 2017-12-07 | 2018-04-20 | 天津华赛尔传热设备有限公司 | A kind of white absorption tower that disappears of heating agent circulation |
| CN108579316A (en) * | 2018-07-05 | 2018-09-28 | 山东三融环保工程有限公司 | A kind of flue gas for wet desulfuration tower disappears white plumage governing system |
| CN109631071A (en) * | 2018-12-06 | 2019-04-16 | 李申强 | A method of eliminating white smoke device and heating eliminating white smoke are heated for coal steam-electric plant smoke |
| CN110848723A (en) * | 2019-10-30 | 2020-02-28 | 广东申菱环境系统股份有限公司 | Flue gas white elimination system and method |
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