CN105240825A - Ultralow-emission MGGH energy conservation and environmental protection equipment and method for thermal power plant - Google Patents
Ultralow-emission MGGH energy conservation and environmental protection equipment and method for thermal power plant Download PDFInfo
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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
The invention discloses ultralow-emission MGGH energy conservation and environmental protection equipment for a thermal power plant. The equipment is connected with a steam pumping and heat recycling system of a steam turbine through open circulation, automatically balances smoke residual heat recycled with heat required for heating boiler inlet air, avoids smoke dew condensation, prevents smoke low-temperature corrosion, ensues that the influence of ambient temperature variation and unit load variation on the temperature of boiler exhaust smoke can be couteracted under various work conditions, and realizes automatic control on the temperature of electrostatic precipitating inlet smoke and the temperature of the boiler inlet air. The equipment can automatically balance the smoke residual heat recycling power of a low-temperature coal economizer and the boiler inlet air heating power of an air heater, and under various work conditions, can automatically control the temperature of an electrostatic precipitating smoke inlet, automatically control the air outlet temperature of the air heater and automatically control the emission temperature of a chimney. The equipment meets environmental protection requirements for smoke emission, and meanwhile, has social benefit and economical benefit of conserving coal, conserving water and reducing smoke emissions.
Description
Technical field
The present invention relates to a kind of thermal power plant minimum discharge MGGH (intermediate heat media flue gas heat-exchange unit: MediaGas-GasHeater) energy-saving environmental protection device and method, belong to thermal power plant minimum discharge MGGH technical field.
Background technology
The minimum discharge problem of coal-fired plant boiler smoke evacuation has obtained country at present and has paid attention to, and in developed area, such as the place such as the Yangtze River Delta, Zhujiang River triangle emits white cigarette quite to pay attention to chimney.Leakage due to the GGH system adopted in the past causes reaching minimum discharge, so the application of MGGH is more and more general.
Flue gas desulfurization (Fluegasdesulfurization is called for short FGD).The lime-gypsum stone Wet Flue Gas Desulfurization Technology of coal-fired flue-gas is wide, the most most effective desulfur technology of current application.For coal-burning power plant, within a period quite grown from now on, FGD will be control SO
2the main method of discharge.Flue gas desulfurization mainly contains dry type flue gas desulfurizing and wet process of FGD two kinds.Wherein wet fuel gas desulfurizing technology flow process, form and mechanism are similar, mainly use lime stone (CaCO
3), lime (CaO) or sodium carbonate (Na
2cO
3) etc. slurries make washing agent, in reaction tower, flue gas is washed, thus removing flue gas in SO
2.This technique has the history of 50 years, and after constantly Improvement and perfection, Technical comparing is ripe, and has desulfuration efficiency high (90% ~ 98%), and unit capacity is large, and coal adaptability is strong, and operating cost lower and byproduct such as easily to reclaim at the advantage.
Also wet desulfurizing process just, makes flue gas after desulfurization water capacity increase, and these to be discharged from desulfurizing tower with saturated wet flue gas state and enter the flue gas of chimney discharged to air, cause grand chimney and emit white cigarette phenomenon.
Since saturated wet flue gas state can emit white cigarette from chimney discharge, so heat neat stress to make it depart from saturation state to discharge again just can alleviate and emit white cigarette phenomenon, neat stress after utilizing the flue gas heat before desulfurizing tower to heat desulfurizing tower thus, the extensive use of MGGH technology is arisen at the historic moment.After solving the key technical problem of flue gas low-temperature corrosion, the economy of MGGH system seems important, how under the prerequisite reaching neat stress emission request, improves benefit of saving coal as far as possible and just becomes the target that vast power technology worker pursues.
Generally adopt the simplest MGGH technology in early days shown in Fig. 1.
Fig. 2 is technical scheme boiler inlet temperature being heated to 50 ~ 90 DEG C taked to make MGGH system obtain certain benefit of saving coal, but system imperfection, may expected effect do not reached.
Reason is that exhaust gas temperature is subject to the impact of variation of ambient temperature and unit load change very greatly, and these impacts may cause system shown in Figure 2 not reach the operational factor of expection.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind ofly to economize on coal, thermal power plant's minimum discharge MGGH energy-saving environmental protection device of smoke discharge amount of economizing on water, reduce and method, solve how under the prerequisite reaching neat stress emission request, improve the problem of benefit of saving coal as far as possible.
In order to solve the problems of the technologies described above, technical scheme of the present invention there is provided a kind of thermal power plant minimum discharge MGGH energy-saving environmental protection device, comprise steam air heater, on the air channel of steam air heater between boiler fan import to boiler air preheater import, by pipeline, (what have is called high temperature cigarette cooler to boiler air preheater with former fume high-temperature radiator successively, flue gas waste heat recovery apparatus etc.), electric precipitator, air-introduced machine, desulfurizing tower, neat stress reheater, chimney connects, the boiler air preheater pipeline be exported between desulfurizing tower import is provided with low-level (stack-gas) economizer, and (what have is called low temperature cigarette cooler, flue gas waste heat recovery apparatus etc.), also comprise the 7th grade low to add, 7th grade low adds that (user had is called that the second level is low to be added, in Air-cooled Unit, be called again that the first order is low to be added) added by pipeline and the 6th grade low that (user had is called that the third level is low to be added, in Air-cooled Unit, be called again that the second level is low to be added) connect, it is characterized in that, described 7th grade low adds and also lowly with the 8th grade to add (user had be called the first order is low to be added) by pipeline and be connected, 7th grade low add and the 6th grade low add between pipeline on pick out two articles of pipelines, article one, pipeline is successively through former fume high-temperature radiator, get back to after neat stress reheater the 7th grade low add and the 6th grade low add between pipeline on, another article of pipeline and the 7th grade low add, 8th grade low add between pipeline pick out behind the one article of pipeline interflow come through low-level (stack-gas) economizer, lowly with the 7th grade after steam air heater subsequently to add, 8th grade low add between pipeline connect.
Preferably, described low-level (stack-gas) economizer is located on the pipeline between air-introduced machine and desulfurizing tower.
Preferably, described boiler fan comprises primary air fan, pressure fan, and steam air heater comprises First air steam air heater, Secondary Air steam air heater, the air channel that primary air fan, pressure fan are connected with boiler air preheater is respectively equipped with First air steam air heater, Secondary Air steam air heater.
Preferably, the pipeline exporting out from described low-level (stack-gas) economizer is divided into two-way and collaborates respectively through after First air steam air heater, Secondary Air steam air heater, then add with the 7th grade low, the 8th grade low add between pipeline be connected.
Preferably, lowly with the described the 7th grade to add, the 6th grade low add between the pipeline that is connected of pipeline on be equipped with valve.
Preferably, lowly with the described the 7th grade to add, the 8th grade low add between the pipeline that is connected of pipeline on be equipped with valve.
Preferably, described the 7th grade low add, the 6th grade low add between pipeline be provided with valve.
Preferably, the rear end of described valve is provided with a pipeline through neat stress reheater, and the front end of valve is provided with two pipelines respectively through former fume high-temperature radiator, low-level (stack-gas) economizer.
Adopt an energy-conserving and environment-protective method for thermal power plant minimum discharge MGGH energy-saving environmental protection device, it is characterized in that, comprise the steps:
A) flue gas dew point temperature is calculated according to coal and smoke components, the minimum tube wall temperature of setting low-level (stack-gas) economizer, automatically design temperature is controlled using this temperature as the inflow temperature of low-level (stack-gas) economizer, prevent smoke condensation, avoid flue gas low-temperature corrosion phenomenon occurs, ensure the safe operation of low-level (stack-gas) economizer;
B) steam air heater leaving air temp is set;
C) set electric precipitator import cigarette temperature, realize low temp. electric dedusting;
D) set chimney emission temperature, eliminate and emit white cigarette phenomenon;
E) reclaimed by the efficient flue gas waste heat of low-level (stack-gas) economizer, heat into stove wind, improve the EAT entering boiler air preheater, reduce unit net coal consumption rate;
F) improve into stove air temperature, ensure the exhaust gas temperature of winter condition, realize the balance of neat stress heating heat and flue gas radiator heat release heat.
The present invention contrasts prior art following beneficial effect: the invention provides a kind of minimum discharge MGGH energy-conserving and environment-protective technology, be connected with extracted steam from turbine heat regenerative system by open circulation, realize the fume afterheat of recovery and heat the heat autobalance needed into stove wind, avoid smoke condensation, prevent flue gas low-temperature from corroding, guarantee can offset variation of ambient temperature and the impact of unit load change on exhaust gas temperature in various operating mode, no matter how environment temperature changes, no matter how unit load changes, automatic control electric gas deduster input gas temperature can be realized under various operating mode, automatic control boiler air preheater import wind-warm syndrome.
The present invention the flue gas waste heat recovery power of autobalance low-level (stack-gas) economizer and steam air heater can heat power into stove wind, achieving under various operating mode can automatic control electric dedusting gas approach temperature, automatic control steam air heater leaving air temp, automatic control smoke stack emission temperature, has the Social benefit and economic benefit of economizing on coal, economizing on water, reducing smoke discharge amount while realizing fume emission environmental requirement.
Accompanying drawing explanation
Fig. 1 is the schematic diagram generally adopting the simplest MGGH technology in early days;
Fig. 2 is the schematic diagram of technical scheme boiler inlet temperature being heated to 50 DEG C;
Fig. 3 is a kind of schematic diagram of thermal power plant minimum discharge MGGH energy-saving environmental protection device.
Wherein: 1 is the 6th grade low adds; 2 are the 7th grade low adds; 3 are the 8th grade low adds; 4 is boiler air preheater; 5 is former fume high-temperature radiator; 6 is electric precipitator; 7 is air-introduced machine; 8 is low-level (stack-gas) economizer; 9 is desulfurizing tower; 10 is neat stress reheater; 11 is chimney; 12 is First air steam air heater; 13 is primary air fan; 14 is Secondary Air steam air heater; 15 is pressure fan; 3-1 is heat medium water booster.
Detailed description of the invention
For making the present invention become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
A kind of thermal power plant minimum discharge MGGH energy-saving environmental protection device of the present invention, as shown in Figure 3, it comprises: the 6th grade low adds the 1, the 7th grade low and add that the 2, the 8th grade low adds 3, neat stress is heated to neat stress reheater 10, chimney 11, First air steam air heater 12, primary air fan 13, Secondary Air steam air heater 14, the pressure fan 15 of 80 DEG C by the cigarette water heat exchange low-level (stack-gas) economizer 8 of boiler smoke heat safe retrieving, desulfurizing tower 9, by boiler air preheater 4, former fume high-temperature radiator 5, electric precipitator 6, air-introduced machine 7.
Low-level (stack-gas) economizer 8 is installed on the flue that boiler air preheater 4 is exported between fume desulfurizing tower 9 import, can classification arrange, and arranges determine depending on field position; On the air channel of steam air heater between boiler fan import to boiler air preheater 4 import, arrange depending on field position and determine; The current direction steam air heater that goes out of low-level (stack-gas) economizer 8 heats into stove wind; The condensate water flowed out from steam air heater flow back into the condensate water import that the 7th grade low adds 2.
Primary air fan 13, difference once wind steam air heater 12 on the pipeline that pressure fan 15 is connected with boiler air preheater 4, Secondary Air steam air heater 14, boiler air preheater 4 by pipeline successively with former fume high-temperature radiator 5, electric precipitator 6, air-introduced machine 7, low-level (stack-gas) economizer 8, desulfurizing tower 9, neat stress reheater 10, chimney 11 connects, 7th grade low adds 2 and is added 1 by pipeline be connected with the 6th grade low, 7th grade low adds 2 and adds 3 be connected by pipeline is also low with the 8th grade, and the 7th grade low adds on 2 and the 6th grade of low pipeline added between 1 and pick out two articles of pipelines, and a pipeline is successively through former fume high-temperature radiator 5, getting back to the 7th grade low after neat stress reheater 10 adds on 2 and the 6th grade of low pipeline added between 1, and another article of pipeline and the 7th grade low add 2, 8th grade of low pipeline added between 3 to pick out behind the one article of pipeline interflow come through low-level (stack-gas) economizer 8, is divided into two-way subsequently respectively through First air steam air heater 12, interflow after Secondary Air steam air heater 14, then add 2 with the 7th grade low, the 8th grade low pipeline added between 3 connects.
Add the 2, the 6th grade low and add on pipeline that the pipeline between 1 is connected with the 7th grade low and be equipped with valve.Add the 2, the 8th grade low and add on pipeline that the pipeline between 3 is connected with the 7th grade low and be equipped with valve.7th grade low adds the 2, the 6th grade of low pipeline added between 1 and is provided with valve, and the rear end of this valve is provided with a pipeline through neat stress reheater 10, and the front end of valve is provided with two pipelines respectively through former fume high-temperature radiator 5, low-level (stack-gas) economizer 8.
A kind of thermal power plant minimum discharge MGGH energy-conserving and environment-protective method (i.e. fume afterheat safe retrieving, effectively heat into stove wind and the method effectively heating neat stress), comprises the steps:
A) flue gas dew point temperature is calculated according to coal and smoke components, the minimum tube wall temperature of setting low-level (stack-gas) economizer 8, automatically design temperature is controlled using this temperature as the inflow temperature of low-level (stack-gas) economizer 8, prevent smoke condensation, avoid flue gas low-temperature corrosion phenomenon occurs, ensure the safe operation of low-level (stack-gas) economizer;
B) steam air heater leaving air temp is set as 50 DEG C (or a certain data that require between 90 DEG C ~ 30 DEG C, when being set as 30 DEG C, only improve the decay resistance of air preheater, and when being set as 90 DEG C, the effect improving benefit of saving coal is fine);
C) electric precipitator 6 import cigarette temperature is set as 90 DEG C (or between 85 DEG C-95 DEG C a certain require data), realizes low temp. electric dedusting;
D) chimney emission temperature is set as 80 DEG C (or a certain required values), eliminates and emit white cigarette phenomenon;
Reclaimed by the efficient flue gas waste heat of low-level (stack-gas) economizer 8, heat into stove wind, improve the EAT entering boiler air preheater 4, reduce unit net coal consumption rate;
By improving into stove air temperature, ensureing the exhaust gas temperature of winter condition, realizing the balance of neat stress heating heat and flue gas radiator heat release heat.
Wherein, the water inlet of former fume high-temperature radiator 5 adds the condensate water outlet of 2 from the 7th grade low, water temperature 73 ~ 93 DEG C herein, condensate water after former fume high-temperature radiator 5 heats is introduced into neat stress reheater 10 and heats neat stress to requiring temperature, and then return the import that the 6th grade low adds 1, form former fume high-temperature radiator 5 and absorb fume afterheat heating neat stress and first circulation reducing unit coal consumption;
The water inlet of low-level (stack-gas) economizer 8 adds condensate water outlet and the mixing water that exports of the 7th grade low condensate water adding 2 of 3 from the 8th grade low, and the water temperature of mixing water is 65 DEG C ~ 85 DEG C.Condensate water after low-level (stack-gas) economizer 8 heats enters Secondary Air steam air heater 14 and First air steam air heater 12, return from steam air heater (i.e. Secondary Air steam air heater 14 and First air steam air heater 12) condensate water out the condensate water outlet that the 8th grade low adds 3, formation low-level (stack-gas) economizer absorption fume afterheat heats second system into stove wind.
In general, the exhaust gas temperature of coal-fired power station boiler is 120 DEG C ~ 130 DEG C, the thermal Finite that this exhaust gas temperature of further reduction reclaims to 90 DEG C, but boiler is entered stove wind to be heated to 50 DEG C exhaust gas temperature can be made to bring up to 140 DEG C, these heats enter the 6th grade low and add 1 import and effectively can reduce the heating steam flow that the 6th grade low adds 1, reduce unit net coal consumption rate 2g/kWh ~ 3g/kWh.
But it is more limited the flue-gas temperature of 95 after air-introduced machine DEG C to be reduced to 80 DEG C of fume afterheats reclaimed, especially when in the winter time environment temperature is reduced to 0 DEG C, heat into the heat needed for stove wind greatly more than low-level (stack-gas) economizer 8 reclaim heat, now just supplemented by steam turbine condensate system.
The present invention is used for boiler smoke heat safe retrieving, reduce former flue-gas temperature to 80 ~ 95 DEG C, for the neat stress after desulfurization is heated to more than 72 DEG C, improve boiler inlet temperature to 50 ~ 90 DEG C simultaneously, effective reduction unit net coal consumption rate, water consume, and improve the elimination of smoke stack emission temperature and emit white cigarette phenomenon.
As shown in Figure 3, the present invention breaches the constraint of existing heat medium water closed cycle technically, joined together by the innovation low-temperature heat source of boiler exhaust gas and steam turbine low-pressure the drawn gas low-temperature heat source of heat regenerative system, solve the inherent shortcoming of closed cycle, make flue gas heat reclaim to reduce flue-gas temperature to 90 DEG C, technical thought that boiler inlet temperature to be brought up to 50 ~ 90 DEG C under various operating mode can be met again and technical scheme becomes feasible technically simultaneously.
The binary cycle system illustrated in the present invention with 2 embodiments below regulates the equilibrium problem realizing flue gas waste heat recovery and enter stove wind heating power automatically:
Embodiment 1
Such as certain power plant 1000MW boiler, unit in the winter time 0 DEG C of operating mode time, for system shown in Figure 2, require steam air heater temperature rise 60 DEG C; When environment temperature is 35 DEG C, require steam air heater temperature rise 25 DEG C.Low-level (stack-gas) economizer 8 and steam air heater thermal power unequal, system can not balance.The result of actual motion is exactly that steam air heater outlet wind-warm syndrome does not reach 60 DEG C, may be minimum at 30 DEG C, when boiler air preheater 4 import wind-warm syndrome reduces, boiler air preheater 4 exit gas temperature also can correspondingly reduce, may to 100 DEG C, if electric precipitator 6 import cigarette temperature still requires 90 DEG C, the smoke temperature drop of former fume high-temperature radiator 5 only has 10 DEG C, and the thermal power of the first circulation reduces naturally; The fume afterheat of the second circulation and stress is not enough to wind-warm syndrome to be heated to 60 DEG C, may only have 30 DEG C, not reach expected design requirement.
But for system shown in Figure 3, unit in the winter time 0 DEG C of operating mode time, require steam air heater temperature rise 60 DEG C; When environment temperature is 35 DEG C, require steam air heater temperature rise 25 DEG C.Low-level (stack-gas) economizer 8 and steam air heater thermal power are by condensate system natural equilibrium.The result steam air heater outlet wind-warm syndrome of actual motion in the winter time operating mode also reaches 60 DEG C, and just heating after stove wind steam air heater outlet water temperature lower than low-level (stack-gas) economizer 8 inlet water temperature 70 DEG C, such as, can reach 60 DEG C.Now the thermal power of the first circulation is substantially constant, and electric precipitator 6 input gas temperature controls at 90 DEG C automatically; The fume afterheat of the second circulation and stress is not enough to wind-warm syndrome to be heated to 60 DEG C, institute lacks part and is supplemented by condensate system, the condensing water temperature leaving condensate system is herein 70 DEG C, and the condensing water temperature returning condensate system is 60 DEG C, reaches expected design requirement.
Flue gas waste heat recovery power and the imbalance problem that heats into stove wind power when visible Fig. 2 system can not meet 0 DEG C of operating mode in winter.
And Fig. 3 system flue gas waste heat recovery power and imbalance problem of heating into stove wind power when can automatically meet 0 DEG C of operating mode in winter by condensate system.
Embodiment 2
Such as certain power plant 1000MW boiler, unit, when 35 DEG C of operating modes in summer, for system shown in Figure 2, requires steam air heater temperature rise 15 DEG C.Low-level (stack-gas) economizer 8 and steam air heater thermal power unequal, system can not balance.The result of actual motion is exactly that steam air heater exports wind-warm syndrome more than 50 DEG C, and reach 60 DEG C, when boiler air preheater 4 import wind-warm syndrome improves, boiler air preheater 4 exit gas temperature also can correspondingly improve, and to 95 DEG C, may not reach expected design requirement.
But for system shown in Figure 3, when environment temperature is 35 DEG C, require steam air heater temperature rise 15 DEG C.Low-level (stack-gas) economizer 8 and steam air heater thermal power are by condensate system natural equilibrium.The result steam air heater outlet wind-warm syndrome of actual motion also reaches 50 DEG C in environment temperature 35 DEG C of operating modes, and just heating steam air heater outlet water temperature after stove wind higher than low-level (stack-gas) economizer 8 inlet water temperature 70 DEG C, such as, can reach 75 DEG C.Now the thermal power of the first circulation is substantially constant, and electric precipitator 6 input gas temperature controls at 90 DEG C automatically; The fume afterheat of the second circulation and stress exceeds wind-warm syndrome is heated to 50 DEG C, and institute exceeds part and enters condensate system, reaches expected design requirement.
Flue gas waste heat recovery power and the imbalance problem that heats into stove wind power when visible Fig. 2 system can not meet 35 DEG C of operating modes in summer.
And Fig. 3 system flue gas waste heat recovery power and imbalance problem of heating into stove wind power when can automatically meet 35 DEG C of operating modes in summer by condensate system.
When steam air heater outlet wind-warm syndrome is set as 30 DEG C, only improve the decay resistance of air preheater.When steam air heater outlet wind-warm syndrome is set as 90 DEG C, the effect improving benefit of saving coal is fine.Under these two kinds of operating modes, the results of running and above-mentioned operating mode similar, in the winter time, summer, unit running on the lower load, do not reach the design parameter of expection.
Although the present invention discloses as above with preferred embodiment; so itself and be not used to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little amendment and perfect, therefore protection scope of the present invention is when being as the criterion of defining with claims.
Claims (9)
1. a thermal power plant minimum discharge MGGH energy-saving environmental protection device, comprise steam air heater, steam air heater is positioned on the air channel between boiler fan import to boiler air preheater (4) import, boiler air preheater (4) by pipeline successively with former fume high-temperature radiator (5), electric precipitator (6), air-introduced machine (7), desulfurizing tower (9), neat stress reheater (10), chimney (11) connects, boiler air preheater (4) pipeline be exported between desulfurizing tower (9) import is provided with low-level (stack-gas) economizer (8), also comprise the 7th grade low to add (2), 7th grade low is added (2) and is connected with the 6th grade low add (the 1st) by pipeline, it is characterized in that, described 7th grade low is added (2) and is also connected add (3) low with the 8th grade by pipeline, 7th grade low adds on (2) and the 6th grade of low pipeline added between (1) and picks out two articles of pipelines, article one, pipeline is successively through former fume high-temperature radiator (5), getting back to the 7th grade low after neat stress reheater (10) adds on (2) and the 6th grade of low pipeline added between (1), another article of pipeline and the 7th grade low add (2), 8th grade of low pipeline added between (3) picks out behind the one article of pipeline interflow come through low-level (stack-gas) economizer (8), lowly with the 7th grade after steam air heater subsequently to add (2), the 8th grade low pipeline added between (3) connects.
2. a kind of thermal power plant minimum discharge MGGH energy-saving environmental protection device as claimed in claim 1, it is characterized in that, described low-level (stack-gas) economizer (8) is located on the pipeline between air-introduced machine (7) and desulfurizing tower (9).
3. a kind of thermal power plant minimum discharge MGGH energy-saving environmental protection device as claimed in claim 1, it is characterized in that, described boiler fan comprises primary air fan (13), pressure fan (15), steam air heater comprises First air steam air heater (12), Secondary Air steam air heater (14), and the air channel that primary air fan (13), pressure fan (15) are connected with boiler air preheater (4) is respectively equipped with First air steam air heater (12), Secondary Air steam air heater (14).
4. a kind of thermal power plant minimum discharge MGGH energy-saving environmental protection device as claimed in claim 3, it is characterized in that, be divided into two-way from described low-level (stack-gas) economizer (8) outlet pipeline out to collaborate afterwards respectively through First air steam air heater (12), Secondary Air steam air heater (14), then add (2) with the 7th grade low, the 8th grade of low pipeline added between (3) is connected.
5. a kind of thermal power plant minimum discharge MGGH energy-saving environmental protection device as claimed in claim 1, is characterized in that, with the described the 7th grade low add (2), the 6th grade low add on pipeline that the pipeline between (1) is connected and be equipped with valve.
6. a kind of thermal power plant minimum discharge MGGH energy-saving environmental protection device as claimed in claim 1, is characterized in that, with the described the 7th grade low add (2), the 8th grade low add on pipeline that the pipeline between (3) is connected and be equipped with valve.
7. a kind of thermal power plant minimum discharge MGGH energy-saving environmental protection device as claimed in claim 1, is characterized in that, described the 7th grade low adds (2), the 6th grade of low pipeline added between (1) is provided with valve.
8. a kind of thermal power plant minimum discharge MGGH energy-saving environmental protection device as claimed in claim 7, it is characterized in that, the rear end of described valve is provided with a pipeline through neat stress reheater (10), and the front end of valve is provided with two pipelines respectively through former fume high-temperature radiator (5), low-level (stack-gas) economizer (8).
9. adopt an energy-conserving and environment-protective method for thermal power plant minimum discharge MGGH energy-saving environmental protection device as claimed in claim 1, it is characterized in that, comprise the steps:
A) flue gas dew point temperature is calculated according to coal and smoke components, setting low-level (stack-gas) economizer (8) minimum tube wall temperature, automatically design temperature is controlled using this temperature as the inflow temperature of low-level (stack-gas) economizer (8), prevent smoke condensation, avoid flue gas low-temperature corrosion phenomenon occurs, ensure the safe operation of low-level (stack-gas) economizer;
B) steam air heater leaving air temp is set;
C) set electric precipitator (6) import cigarette temperature, realize low temp. electric dedusting;
D) set chimney (11) exhaust gas temperature, eliminate and emit white cigarette phenomenon;
E) reclaimed by the efficient flue gas waste heat of low-level (stack-gas) economizer (8), heat into stove wind, improve the EAT entering boiler air preheater (4), reduce unit net coal consumption rate;
F) improve into stove air temperature, ensure the exhaust gas temperature of winter condition, realize the balance of neat stress heating heat and flue gas radiator heat release heat.
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| CN106765020A (en) * | 2016-12-15 | 2017-05-31 | 大唐陕西发电有限公司灞桥热电厂 | A kind of MGGH wall temperature of heated surface control system |
| CN106838961A (en) * | 2017-01-06 | 2017-06-13 | 上海羲蓝节能环保科技有限公司 | A kind of thermal power plant's minimum discharge simple type WGGAH energy-saving environmental protection devices and method |
| CN107023819A (en) * | 2017-05-22 | 2017-08-08 | 山西中源科扬节能服务有限公司 | Low low-level (stack-gas) economizer Two-way Cycle heating system and Two-way Cycle heating means |
| CN107166420A (en) * | 2017-06-12 | 2017-09-15 | 清华大学 | Boiler exhaust gas the heat wet direct recovery method and device circulated based on vapor heat-carrying |
| CN107166417A (en) * | 2017-07-10 | 2017-09-15 | 都江电力设备厂 | A kind of new MGGH systems minimum wall temperature control method and system |
| CN109012068A (en) * | 2018-10-17 | 2018-12-18 | 上海外高桥第二发电有限责任公司 | It is a kind of for administering the Emission Optimization method of white plume |
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| CN109751613A (en) * | 2018-11-23 | 2019-05-14 | 上海外高桥第二发电有限责任公司 | A kind of micro- energy consumption operation method of the ultra-clean exhaust system of super critical boiler |
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| CN112097287A (en) * | 2019-06-17 | 2020-12-18 | 王键 | Boiler energy-saving and flue gas whitening system, process and application |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0821618A (en) * | 1994-07-06 | 1996-01-23 | Ishikawajima Harima Heavy Ind Co Ltd | Exhaust gas treating device |
| JP2009008365A (en) * | 2007-06-29 | 2009-01-15 | Hitachi Ltd | Steam power plant |
| CN104456611A (en) * | 2014-12-05 | 2015-03-25 | 浙江省电力设计院 | Composite utilization system for waste heat of exhaust fume of boiler |
| CN104566424A (en) * | 2015-01-12 | 2015-04-29 | 重庆中电节能技术服务有限公司 | Combined steam smoke MGGH system and flue gas treatment technology |
| CN204478009U (en) * | 2014-12-19 | 2015-07-15 | 重庆中电节能技术服务有限公司 | A kind of low low-temperature flue gas waste heat recovery system |
| CN104848238A (en) * | 2015-04-22 | 2015-08-19 | 东南大学 | Electric dust removal heat exchange system |
-
2015
- 2015-11-10 CN CN201510760590.2A patent/CN105240825A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0821618A (en) * | 1994-07-06 | 1996-01-23 | Ishikawajima Harima Heavy Ind Co Ltd | Exhaust gas treating device |
| JP2009008365A (en) * | 2007-06-29 | 2009-01-15 | Hitachi Ltd | Steam power plant |
| CN104456611A (en) * | 2014-12-05 | 2015-03-25 | 浙江省电力设计院 | Composite utilization system for waste heat of exhaust fume of boiler |
| CN204478009U (en) * | 2014-12-19 | 2015-07-15 | 重庆中电节能技术服务有限公司 | A kind of low low-temperature flue gas waste heat recovery system |
| CN104566424A (en) * | 2015-01-12 | 2015-04-29 | 重庆中电节能技术服务有限公司 | Combined steam smoke MGGH system and flue gas treatment technology |
| CN104848238A (en) * | 2015-04-22 | 2015-08-19 | 东南大学 | Electric dust removal heat exchange system |
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| CN109114583B (en) * | 2018-09-26 | 2024-01-09 | 西安交通大学 | Flue gas waste heat utilization system of coal-fired power plant and working method |
| CN109012068A (en) * | 2018-10-17 | 2018-12-18 | 上海外高桥第二发电有限责任公司 | It is a kind of for administering the Emission Optimization method of white plume |
| CN109751613A (en) * | 2018-11-23 | 2019-05-14 | 上海外高桥第二发电有限责任公司 | A kind of micro- energy consumption operation method of the ultra-clean exhaust system of super critical boiler |
| CN112097287A (en) * | 2019-06-17 | 2020-12-18 | 王键 | Boiler energy-saving and flue gas whitening system, process and application |
| CN112097287B (en) * | 2019-06-17 | 2022-09-30 | 重庆鑫顺盛达科技有限公司 | Boiler energy-saving and flue gas whitening system, process and application |
| CN110486745A (en) * | 2019-08-29 | 2019-11-22 | 重庆大学 | A kind of desulfurizing tower entrance flue gas temperature, which is adjusted, recycles coupled system with efficient waste heat |
| CN110486711A (en) * | 2019-09-26 | 2019-11-22 | 西安西热锅炉环保工程有限公司 | A kind of low low-level (stack-gas) economizer system for sulphur coal unit |
| CN110594769A (en) * | 2019-10-16 | 2019-12-20 | 福建龙净环保股份有限公司 | Flue gas treatment system |
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