CN105521706A - SCR (selective catalytic reduction) denitration device for low-dust flue gas in thermal power plant and denitration method - Google Patents
SCR (selective catalytic reduction) denitration device for low-dust flue gas in thermal power plant and denitration method Download PDFInfo
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- CN105521706A CN105521706A CN201610065362.8A CN201610065362A CN105521706A CN 105521706 A CN105521706 A CN 105521706A CN 201610065362 A CN201610065362 A CN 201610065362A CN 105521706 A CN105521706 A CN 105521706A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
- B01D53/565—Nitrogen oxides by treating the gases with solids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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Abstract
The invention provides an SCR (selective catalytic reduction) denitration device for low-dust flue gas in a thermal power plant and a denitration method and relates to a device and a method for purifying exhaust gas by adopting a reactant injection catalytic method. The SCR denitration device for the low-dust flue gas in the thermal power plant comprises a flue gas steam heater, an air steam heater, a steam drainage system, a hot blast heater, an SCR reactor, a flue gas heat exchanger, an ammonia water storage and supply system, an ammonia water evaporator and related auxiliary equipment. According to the denitration method, boiler flue gas from the rear part of a dust remover is treated by the device, the flue gas is heated by combining the high-temperature hot blast heater, the flue gas steam heater and the rotary flue gas heat exchanger, and accordingly, the purposes of energy saving, consumption reduction and operating cost reduction are achieved.
Description
Technical field
The present invention relates to purifying exhaust air conventional method and for the specially designed equipment of these class methods or device, particularly relate to the device and method adopting the catalysis process purifying exhaust air injecting reactant.
Background technology
In numerous gas denitrifying technology, SCR (SCR) technology is a kind of technology that current large thermal power plant denitrating flue gas is most widely used.The denitration efficiency of SCR gas denitrifying technology reaches as high as more than 90%, is the denitration technology of mature and reliable the most.Its principle is under the effect of catalyst, reducing agent NH
3preference with the NO in flue gas
xreaction, by the NO in flue gas
xbe reduced to nitrogen and water, the effecting reaction temperature range of its catalyst must between 300 DEG C ~ 400 DEG C.In order to meet the suitable reaction temperature of SCR catalyst, current SCR reactor is all arranged between boiler economizer outlet and air preheater entrance, meanwhile, be in the deduster equipment in flue gas flow due to SCR reactor before, therefore the dust content of flue gas is very high, generally at 20-50g/m
3between, cause the wearing and tearing of SCR flue and equipment also very serious.
In addition, for some built units (particularly old unit) without reserved denitration space between economizer and air preheater, when the higher denitration efficiency of needs, how carrying out SCR denitration is a problem being worth research, if after denitration device (SCR reactor) is arranged in deduster, although the problem that denitration facility takes up room can be solved flexibly, but create the problem that flue-gas temperature can not meet the efficient catalytic reaction temperature interval of high temperature catalyst in addition, cannot realize target denitration efficiency, reason is as follows:
(1) flue gas after deduster is through the cooling of boiler air preheater, flue-gas temperature is interval general between 110 DEG C ~ 180 DEG C, interval far below the normal catalytic reaction temperature of high temperature catalyst, maturation, inexpensive, reliable high temperature catalyst therefore cannot be adopted to improve denitration efficiency;
(2) adopt so-called low temperature catalyst (catalytic reaction temperature is below 200 DEG C) to meet lower smoke reaction temperature requirement, because reaction temperature is low, catalyst activity is relatively lower, must increase caltalyst accumulated amount to ensure high denitration efficiency, at porch NO
xunder the design condition that concentration is identical, its volume of employing low temperature catalyst can increase to 2 ~ 3 times relative to high temperature catalyst, and this just causes equipment volume, catalyst cost etc. significantly to rise.In addition, when flue-gas temperature is lower than 200 DEG C, NH superfluous in flue gas
3(spraying into needed for denitration) and SO
3the ammonium salts such as reaction generation ammonium hydrogen sulfate, ammonium salt produces the easy blocking of deposition and corrodes catalyst and equipment, brings great potential safety hazard to system cloud gray model.
Summary of the invention
The technical problem to be solved in the present invention is to provide the low ash-laden gas SCR denitration device of a kind of thermal power plant, the denitrification apparatus of high temperature catalyst can be adopted after can being arranged in unit deduster, to be adapted between economizer and air preheater, without the built unit in denitration space or boiler, guarantee safe production.
The low ash-laden gas SCR denitration device of thermal power plant of the present invention, flue comprises former flue gases duct, neat stress flue, described former flue gases duct arrival end is provided with flue gas vapors heater, the port of export is provided with SCR reactor, also comprising interior separation is former flue gas chamber, the flue gas heat-exchange unit in neat stress chamber, described former flue gas chamber, neat stress chamber respectively with former flue gases duct, neat stress flue is communicated with, described SCR reactor is communicated with neat stress flue, described former flue gases duct is communicated with hot-blast stove, described flue gas vapors heater and steam drainage system, air vapor heater is communicated with, described air vapor heater one end connects dilution air, the other end connects ammoniacal liquor evaporimeter, described ammoniacal liquor evaporimeter is connected with ammoniacal liquor to store and supply system, the vortex mixer spraying for ammonia and mix is provided with in described former flue gases duct, described ammoniacal liquor evaporimeter is communicated with vortex mixer.
The low ash-laden gas SCR denitration device of thermal power plant of the present invention, wherein said hot-blast stove is connected with temperature adjustment blower fan.
The low ash-laden gas SCR denitration device of thermal power plant of the present invention, wherein said ammoniacal liquor stores and comprises tank used for storing ammonia, ammoniacal liquor supply pump, adjustment mechanism for valve with supply system, and described ammoniacal liquor supply pump and adjustment mechanism for valve are installed between tank used for storing ammonia and ammoniacal liquor evaporimeter.
The low ash-laden gas SCR denitration device of thermal power plant of the present invention, wherein said ammoniacal liquor evaporator inlet place is provided with atomizer, and described nozzle threads is connected to porch and is configured with dismountable flange.
The low ash-laden gas SCR denitration device of thermal power plant of the present invention, wherein said steam drainage system comprises flash tank, drain tap, hydrophobic valve, described flash tank is connected with low-pressure steam pipe network and condensate water pipe network.
Present invention also offers a kind of method of denitration utilizing said apparatus, comprise the steps:
A checks that ammoniacal liquor stores and supply system, ammoniacal liquor evaporimeter, external vapour system, condensate water pipe network, flue gas heat-exchange unit, flue gas vapors heater, air vapor heater, hot-blast stove make the said equipment possess logical plume part;
B starts flue gas heat-exchange unit;
C flue gas heat-exchange unit starts described vapour system, condensate water pipe network, flue gas vapors heater, air vapor heater, hot-blast stove also logical flue gas after operating a period of time;
D starts dilution air, keeps the spray ammonia system pipeline on ammoniacal liquor evaporimeter unimpeded;
E is described flue gas vapors heater, air vapor heater passes into incoming flow steam and opens flash tank, keeps steam drainage system unimpeded;
F regulates the incoming flow steam flow passing into flue gas vapors heater, air vapor heater by steam regulation inlet valve, progressively make to pass into the cigarette temperature rise of SCR reactor inlet to 150-190 DEG C from former flue gases duct;
G starts hot-blast stove, and by temperature adjustment Fan Regulation temperature, makes the cigarette temperature at SCR reactor inlet place reach 190-260 DEG C;
H continues the flue-gas temperature strengthening hot-blast stove exit, until the cigarette temperature at SCR reactor inlet place reaches setting value 300-320 DEG C;
I starts ammoniacal liquor supply pump, keeps ammoniacal liquor to store with supply system unimpeded;
J starts ammoniacal liquor evaporimeter;
K ammoniacal liquor evaporimeter passes through spray ammonia system pipeline and is stored by ammonia and be supplied to vortex mixer, and carry out denitration to the flue gas in former flue gases duct, parameter such as foundation denitration efficiency, the escaping of ammonia rate etc., controls ammoniacal liquor flow by adjustment mechanism for valve simultaneously;
L completes denitration.
The denitrating technique flow process of the application is as follows:
Carry out the low temperature after Self-duster, low ash-laden gas is heated to enter after uniform temperature the former flue gases duct of flue gas heat-exchange unit (denitration GGH system) through flue gas vapors heater and continues to heat up, the high-temperature flue gas exported with hot blast stove system more subsequently mixes and continues to be warming up to high temperature catalyst reactivity temperature.The fuel of hot-blast stove can adopt diesel oil, natural gas etc.Because hot-blast stove needs to consume certain fuel, therefore, be fuel saving, system is following three grades of heating systems to flue gas intensification employing:
(1) utilize process steams, by flue gas heat-exchange unit, low-temperature flue gas is heated to 150 DEG C about-190 DEG C;
(2) by flue gas heat-exchange unit, low-temperature flue gas is warming up to about 290 DEG C by heat further that utilize SCR reactor (Benitration reactor) to export the flue gas of about 320 DEG C;
(3) last, the high-temperature flue gas that this part flue gas exports with hot-blast stove is again mixed and heated to about 320 DEG C, to adapt to the catalytic reaction temperature of high temperature catalyst, thus enters SCR reactor and reacts.
The fuel of hot-blast stove by with air mixed combustion after, cigarette temperature reaches about 1500 DEG C, with cooling air, high-temperature flue gas need be adjusted to about 850 DEG C-900 DEG C, and then enter the flue gas that flue continues heating boiler, adopting flue gas directly to join mixed main purpose is herein heat convection.Adopt during denitration of the present invention be above-mentioned one-level heating after the heat smoke of about 150 DEG C-190 DEG C as cooling wind regime, adopt frequency conversion fan that former flue gas is delivered to hearth of hot-blast stove afterbody, through with hot-blast stove high-temperature flue gas join mixed after deliver to former flue gases duct, do not adopt surrounding air to do cooling wind regime and reduce further the cold blast rate entering flue gas system, serve energy-conservation effect.
In addition, the mist of the ammonia/air prepared by ammoniacal liquor evaporimeter enters the former flue gases duct before SCR reactor, enters in SCR reactor and carry out denitrating flue gas process after the heat smoke of eddy current hybrid system after heating up fully mixes.Flue gas after denitration process enters neat stress flue, discharges after being lowered the temperature by the flue gas heat exchange of flue gas heat-exchange unit and former flue gases duct, uses flue gas heat-exchange unit (denitration GGH system) to reach object that is energy-saving and cost-reducing and reduction operating cost.
In sum, denitrification apparatus of the present invention and adopt the method for denitration of this device, solving denitration facility, to take up an area size large, and the problem of difficulty is installed in transformation additional, maturation, inexpensive, reliable high temperature catalyst still can be used to improve denitration efficiency simultaneously.Because the flue gas after deduster has been that (dust contained flue gas concentration is at 20 ~ 100mg/m for low ash-laden gas
3between), thus solve flue, the wear problem of catalyst, denitration device, the life-span of denitration device and catalyst is extended greatly, improves the performance driving economy of overall denitration facility.In addition, because denitrification apparatus does not need to transform the back-end ductwork of original boiler, economizer and steelframe again, save a large amount of boiler body retrofit works, significantly reduce construction investment.And low dust-laden denitrification apparatus, owing to having influence on boiler improvement, thus also can not bring the impact of burning and efficiency aspect, greatly meet the demand of energy-saving and environmental protection and safety in production to boiler.
Below in conjunction with accompanying drawing, the low ash-laden gas SCR denitration device of thermal power plant of the present invention, method of denitration are described further.
Accompanying drawing explanation
Fig. 1 is the structural representation of the low ash-laden gas SCR denitration device of thermal power plant of the present invention.
Detailed description of the invention
As shown in Figure 1, flue comprises former flue gases duct 3, neat stress flue 31, and former flue gases duct 3 arrival end is provided with flue gas vapors heater 2, and the flue gas 1 after unit deduster passes into flue gas vapors heater 2 from this arrival end.Former flue gases duct 3 port of export is provided with SCR reactor 14, SCR reactor 14 and is communicated with neat stress flue 31, and the flue gas after SCR reactor 14 processes is discharged through neat stress flue 31, and the discharge interface 15 that herein can arrange according to the actual requirements with user is connected.The denitrification apparatus of the application also comprises the flue gas heat-exchange unit 4 that interior separation is former flue gas chamber 41, neat stress chamber 42, and former flue gas chamber 41, neat stress chamber 42 are communicated with former flue gases duct 3, neat stress flue 31 respectively.Former flue gases duct 3 is communicated with hot-blast stove 5.For ease of regulating heating-up temperature, obtaining the flue gas of sufficient temp, hot-blast stove 5 being connected with temperature adjustment blower fan 6.
Flue gas vapors heater 2 is also communicated with steam drainage system, air vapor heater 8.Flue gas vapors heater 2 is the equipment that principle is identical with air vapor heater 8, is and adopts Steam Heating flue gas or air.Steam drainage system comprises flash tank 17, drain tap, hydrophobic valve, flash tank 17 is connected with low-pressure steam pipe network 18 and condensate water pipe network 19, the low-pressure steam pipe network 18 of power plant is for reclaiming the gas of flash tank 17 discharge, the condensate water that flash tank 17 produces is drained into power plant condensation water system by condensate water pipe network 19, reclaims condensate water.
Air vapor heater 8 one end connects dilution air 7, the other end connects ammoniacal liquor evaporimeter 9, ammoniacal liquor evaporimeter 9 is connected with ammoniacal liquor to store and supply system, be provided with the vortex mixer 13 spraying for ammonia and mix in former flue gases duct 3, ammoniacal liquor evaporimeter 9 is communicated with vortex mixer 13.Ammoniacal liquor stores and comprises tank used for storing ammonia 11, ammoniacal liquor supply pump 10, adjustment mechanism for valve 12 with supply system, and ammoniacal liquor supply pump 10 and adjustment mechanism for valve 12 are installed between tank used for storing ammonia 11 and ammoniacal liquor evaporimeter 9.
Method of denitration of the present invention reducing agent ammonia used evaporates ammoniacal liquor by ammoniacal liquor evaporimeter 9 and obtains.First, the air under normal temperature is sent into air vapor heater 8 through dilution air 7 and is heated, and enters ammoniacal liquor evaporimeter 9 subsequently.Meanwhile, store from ammoniacal liquor the ammoniacal liquor come with supply system and to spray through atomizer and enter ammoniacal liquor evaporimeter 9 and evaporate rapidly under the effect of high temperature dilution wind, discharge ammonia.Atomizer is arranged in the ammonia inlet place of ammoniacal liquor evaporimeter 9, and its Main Function is atomized ammonia, is convenient to the evaporation of ammoniacal liquor fast vaporizing, prevents ammoniacal liquor from not evaporating in time and the ammonia emission pipeline that enters ammoniacal liquor evaporimeter 9 causes waste.For ease of installing/dismounting, save the operating time, atomizer adopts and is threaded and configures dismountable flange.The mist of the water vapour after evaporation, ammonia and hot-air exports from ammoniacal liquor evaporimeter 9 vortex mixer 13 entered in former flue gases duct 3.
The low ash-laden gas SCR denitration method of thermal power plant comprises the steps:
A checks that ammoniacal liquor stores and supply system, ammoniacal liquor evaporimeter 9, external vapour system, condensate water pipe network 19, flue gas heat-exchange unit 4, flue gas vapors heater 2, air vapor heater 8, hot-blast stove 5 make the said equipment possess logical plume part;
B starts flue gas heat-exchange unit 4;
C flue gas heat-exchange unit 4 starts vapour system, condensate water pipe network 19, flue gas vapors heater 2, air vapor heater 8, hot-blast stove 5 also logical flue gas after operating a period of time;
D starts dilution air 7, keeps the spray ammonia system pipeline on ammoniacal liquor evaporimeter 9 unimpeded;
E is flue gas vapors heater 2, air vapor heater 8 passes into incoming flow steam 16 and open flash tank 17, keeps steam drainage system unimpeded;
F regulates incoming flow steam 16 flow passing into flue gas vapors heater 2, air vapor heater 8 by steam regulation inlet valve, progressively make to pass into the cigarette temperature rise of SCR reactor 14 porch to 150-190 DEG C from former flue gases duct 3;
G starts hot-blast stove 5, and regulates temperature by temperature adjustment blower fan 6, makes the cigarette temperature of SCR reactor 14 porch reach 190-260 DEG C;
H continues the flue-gas temperature strengthening hot-blast stove 5 exit, until the cigarette temperature of SCR reactor 14 porch reaches setting value 300-320 DEG C;
I starts ammoniacal liquor supply pump 10, keeps ammoniacal liquor to store with supply system unimpeded;
J starts ammoniacal liquor evaporimeter 9;
K ammoniacal liquor evaporimeter 9 passes through spray ammonia system pipeline and is stored by ammonia and be supplied to vortex mixer 13, and carry out denitration to the flue gas in former flue gases duct 3, parameter such as foundation denitration efficiency, the escaping of ammonia rate etc., controls ammoniacal liquor flow by adjustment mechanism for valve 12 simultaneously;
L completes denitration.
In above-mentioned method of denitration, denitration efficiency and the escaping of ammonia rate are whole denitrating system performance assessment criteria, such as, and denitration efficiency 80%, the escaping of ammonia rate 3ppm.
The present invention will be described for the data using under two units, a unit operating mode below respectively.
Under two B of Unit MCR operating modes (BMCR (Boilermaximumcontinuousrating): boiler maximum continuous rating is mainly meeting the EIAJ under steam parameter, burner hearth security situation):
Under 1 B of Unit MCR operating mode:
Under 1 unit 50%BMCR operating mode:
From above-mentioned data, this device can change by flexible adaptation unit load, realizes the process of full working scope denitrating flue gas, can avoid, due to unit load change, causing flue gas cigarette temperature to change, thus affecting denitrating flue gas process, more embody the superiority of device.
In sum, denitrification apparatus of the present invention and utilize the denitration method for flue gas of this device at least to have following beneficial effect:
(1) in denitrification apparatus of the present invention, can heater and heat medium be set flexibly, the flue gas desulfurization technique in later stage can also be coordinated to design, by three grades of heating systems, reduce the fuel consumption of hot-blast stove 5 to greatest extent, and take full advantage of steam waste heat and the internal system waste heat of power plant, reach energy-saving and cost-reducing object;
(2) this method of denitration has the feature not needing to transform boiler body and back-end ductwork thereof, can as between economizer and air preheater without the more excellent process choice of the old unit in denitration space;
(3) adopt ammoniacal liquor ammonia to be a kind of ammonia mode processed with higher-security, for Pump for Medium and Small Power Generating Set, there is excellent security and economy;
(4) a large amount of boiler body retrofit works is saved, significantly reduce construction investment, after deduster, low dust-laden denitrification apparatus is owing to having influence on boiler improvement, thus the adverse effect of burning and efficiency aspect also can not be brought to boiler, thus greatly meet the demand of energy-saving and environmental protection and safety in production;
(5) solve the wear problem of denitrating catalyst and equipment thereof, the life-span of denitration device and catalyst is extended greatly, improves the performance driving economy of overall denitrification apparatus.
(6) avoid the significantly increase of caltalyst sum cost using low temperature catalyst to bring, and generate the potential safety hazard of deposition that the ammonium salts such as ammonium hydrogen sulfate bring to system, blocking and corrosion at low temperatures;
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (6)
1. the low ash-laden gas SCR denitration device of thermal power plant, it is characterized in that: flue comprises former flue gases duct (3), neat stress flue (31), described former flue gases duct (3) arrival end is provided with flue gas vapors heater (2), the port of export is provided with SCR reactor (14), also comprising interior separation is former flue gas chamber (41), the flue gas heat-exchange unit (4) in neat stress chamber (42), described former flue gas chamber (41), neat stress chamber (42) respectively with former flue gases duct (3), neat stress flue (31) is communicated with, described SCR reactor (14) is communicated with neat stress flue (31), described former flue gases duct (3) is communicated with hot-blast stove (5), described flue gas vapors heater (2) and steam drainage system, air vapor heater (8) is communicated with, described air vapor heater (8) one end connects dilution air (7), the other end connects ammoniacal liquor evaporimeter (9), described ammoniacal liquor evaporimeter (9) is connected with ammoniacal liquor to store and supply system, the vortex mixer (13) spraying for ammonia and mix is provided with in described former flue gases duct (3), described ammoniacal liquor evaporimeter (9) is communicated with vortex mixer (13).
2. the low ash-laden gas SCR denitration device of thermal power plant according to claim 1, is characterized in that: described hot-blast stove (5) is connected with temperature adjustment blower fan (6).
3. the low ash-laden gas SCR denitration device of thermal power plant according to claim 2, it is characterized in that: described ammoniacal liquor stores and comprises tank used for storing ammonia (11), ammoniacal liquor supply pump (10), adjustment mechanism for valve (12) with supply system, and described ammoniacal liquor supply pump (10) and adjustment mechanism for valve (12) are installed between tank used for storing ammonia (11) and ammoniacal liquor evaporimeter (9).
4. the low ash-laden gas SCR denitration device of thermal power plant according to claim 3, is characterized in that: described ammoniacal liquor evaporimeter (9) porch is provided with atomizer, and described nozzle threads is connected to porch and is configured with dismountable flange.
5. the low ash-laden gas SCR denitration device of thermal power plant according to claim 4, it is characterized in that: described steam drainage system comprises flash tank (17), drain tap, hydrophobic valve, described flash tank (17) is connected with low-pressure steam pipe network (18) and condensate water pipe network (19).
6. utilize the method for denitration of the low ash-laden gas SCR denitration device of the thermal power plant described in claim 5, it is characterized in that: comprise the steps:
A checks that ammoniacal liquor stores and supply system, ammoniacal liquor evaporimeter (9), external vapour system, condensate water pipe network (19), flue gas heat-exchange unit (4), flue gas vapors heater (2), air vapor heater (8), hot-blast stove (5) make the said equipment possess logical plume part;
B starts flue gas heat-exchange unit (4);
C flue gas heat-exchange unit (4) starts described vapour system, condensate water pipe network (19), flue gas vapors heater (2), air vapor heater (8), hot-blast stove (5) logical flue gas after running a period of time;
D starts dilution air (7), keeps the spray ammonia system pipeline on ammoniacal liquor evaporimeter (9) unimpeded;
E is described flue gas vapors heater (2), air vapor heater (8) passes into incoming flow steam (16) and opens flash tank (17), keeps steam drainage system unimpeded;
F regulates incoming flow steam (16) flow passing into flue gas vapors heater (2), air vapor heater (8) by steam regulation inlet valve, progressively make to pass into the cigarette temperature rise of SCR reactor (14) porch to 150-190 DEG C from former flue gases duct (3);
G starts hot-blast stove (5), and regulates temperature by temperature adjustment blower fan (6), makes the cigarette temperature of SCR reactor (14) porch reach 190-260 DEG C;
H continues the flue-gas temperature strengthening hot-blast stove (5) exit, until the cigarette temperature of SCR reactor (14) porch reaches setting value 300-320 DEG C;
I starts ammoniacal liquor supply pump (10), keeps ammoniacal liquor to store with supply system unimpeded;
J starts ammoniacal liquor evaporimeter (9);
K ammoniacal liquor evaporimeter (9) passes through spray ammonia system pipeline and is stored by ammonia and be supplied to vortex mixer (13), denitration is carried out to the flue gas in former flue gases duct (3), simultaneously according to the parameter such as denitration efficiency, the escaping of ammonia rate, control ammoniacal liquor flow by adjustment mechanism for valve (12);
L completes denitration.
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| CN106076117A (en) * | 2016-07-11 | 2016-11-09 | 浙江浙能技术研究院有限公司 | A kind of fired power generating unit efficient low-load denitrification apparatus and control method |
| CN107120673A (en) * | 2017-05-11 | 2017-09-01 | 无锡华光新动力环保科技股份有限公司 | Low temperature SCR denitration and flue gas take off white device |
| CN108087903A (en) * | 2018-01-19 | 2018-05-29 | 云南丰普科技有限公司 | Prevent the GGH heating systems and application method of wet flue gas clog pipeline |
| CN109589788A (en) * | 2018-12-05 | 2019-04-09 | 武汉奥杰科技股份有限公司 | A kind of Novel flue gas denitrating system |
| CN110141961A (en) * | 2019-05-22 | 2019-08-20 | 上海电力学院 | A kind of coal-burning boiler full load SCR denitration system |
| CN110368811A (en) * | 2019-08-16 | 2019-10-25 | 北京首钢国际工程技术有限公司 | A kind of SCR denitration Smoke-heating device for wearing secondary mixed wind |
| CN111467962A (en) * | 2020-05-13 | 2020-07-31 | 鞍山华信重工机械有限公司 | Flue gas dedusting and denitration system device for magnesium refractory material industrial furnace |
| CN112304105A (en) * | 2020-11-23 | 2021-02-02 | 西安西热锅炉环保工程有限公司 | Cascade utilization system for flue gas waste heat of alkali furnace |
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| CN106076117A (en) * | 2016-07-11 | 2016-11-09 | 浙江浙能技术研究院有限公司 | A kind of fired power generating unit efficient low-load denitrification apparatus and control method |
| CN106076117B (en) * | 2016-07-11 | 2018-09-25 | 浙江浙能技术研究院有限公司 | A kind of fired power generating unit efficient low-load denitrification apparatus and control method |
| CN107120673A (en) * | 2017-05-11 | 2017-09-01 | 无锡华光新动力环保科技股份有限公司 | Low temperature SCR denitration and flue gas take off white device |
| CN108087903A (en) * | 2018-01-19 | 2018-05-29 | 云南丰普科技有限公司 | Prevent the GGH heating systems and application method of wet flue gas clog pipeline |
| CN108087903B (en) * | 2018-01-19 | 2023-08-22 | 云南丰普科技有限公司 | GGH heating system for preventing wet flue gas from corroding and blocking pipeline and use method |
| CN109589788A (en) * | 2018-12-05 | 2019-04-09 | 武汉奥杰科技股份有限公司 | A kind of Novel flue gas denitrating system |
| CN109589788B (en) * | 2018-12-05 | 2021-11-30 | 武汉奥杰科技股份有限公司 | Novel flue gas denitration system |
| CN110141961A (en) * | 2019-05-22 | 2019-08-20 | 上海电力学院 | A kind of coal-burning boiler full load SCR denitration system |
| CN110368811A (en) * | 2019-08-16 | 2019-10-25 | 北京首钢国际工程技术有限公司 | A kind of SCR denitration Smoke-heating device for wearing secondary mixed wind |
| CN111467962A (en) * | 2020-05-13 | 2020-07-31 | 鞍山华信重工机械有限公司 | Flue gas dedusting and denitration system device for magnesium refractory material industrial furnace |
| CN112304105A (en) * | 2020-11-23 | 2021-02-02 | 西安西热锅炉环保工程有限公司 | Cascade utilization system for flue gas waste heat of alkali furnace |
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| CN105521706B (en) | 2018-04-03 |
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