CN107875851A - A kind of self catalyzed reduction denitrating system applied to full load denitrating flue gas - Google Patents

A kind of self catalyzed reduction denitrating system applied to full load denitrating flue gas Download PDF

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Publication number
CN107875851A
CN107875851A CN201711088426.7A CN201711088426A CN107875851A CN 107875851 A CN107875851 A CN 107875851A CN 201711088426 A CN201711088426 A CN 201711088426A CN 107875851 A CN107875851 A CN 107875851A
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China
Prior art keywords
temperature
low
calcium base
base reductant
injection apparatus
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CN201711088426.7A
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CN107875851B (en
Inventor
周忠新
蒋胜昔
崔晓慧
鲁妍
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Shandong Ao Neng Power Tech Corp Inc
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Shandong Ao Neng Power Tech Corp Inc
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/869Multiple step processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/8621Removing nitrogen compounds
    • B01D53/8625Nitrogen oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/8696Controlling the catalytic process
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/90Injecting reactants
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/003Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/006Layout of treatment plant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/02Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/04Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/20Reductants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00Preventing emissions
    • F23J2215/10Nitrogen; Compounds thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2219/00Treatment devices
    • F23J2219/10Catalytic reduction devices

Abstract

The invention discloses a kind of self catalyzed reduction denitrating system applied to full load denitrating flue gas, including boiler body, Benitration reactor and control system, the boiler body side is provided with air preheater, Benitration reactor is provided between vertical shaft and air preheater afterwards, secondary inlet NO is provided between Benitration reactor and economizerXSample point, secondary exit port NO is provided between Benitration reactor and air preheaterXSample point, the first catalyst layer, the second catalyst layer and the 3rd catalyst layer are sequentially provided with from top to bottom in the Benitration reactor.The present invention ensure that reducing agent can have preferable activity under each load temperature using its wider effective warm area;By the setting of two level self catalyzed reduction agent, application load section is further widened, ensure that denitration efficiency, by controlling biological base reductant flow, system adjustable characteristic is enhanced, without ammonia reducing agent, operation more safety and environmental protection, plant modification investment is small, simple to operate.

Description

A kind of self catalyzed reduction denitrating system applied to full load denitrating flue gas
Technical field
The present invention relates to out of stock system in a kind of thermoelectricity industry, specifically a kind of urging certainly applied to full load denitrating flue gas Change reduction denitrating system.
Background technology
NOXAs the pernicious gas in the industrial productions such as thermoelectricity industry, glass-ceramic industry, coking industry, cement industry Occur, have larger harm to normal atmospheric environment, it can directly cause acid rain, toxicity haze.Therefore it is right in process units NO in flue gasXThere is larger limitation, it is out of stock to be just particularly important.In recent years, thermoelectricity industry, coking industry, cement row The tradition removing NO that industry, glass-ceramic industry useXMode has the methods of SNCR, SCR.These methods are required for the denitration of shape shadow Reducing agent.
The selection of denitrification reducing agent typically considers in terms of its physical property, economy and security, main at present There are three kinds of liquefied ammonia, ammoniacal liquor and urea.Because liquefied ammonia is hazardous chemical, as country is to the pay attention to day by day of safety, and a system Arrange the gradual appearance of related restriction so that power plant receives more using during liquefied ammonia in all many-sides such as examination & approval, duration, occupation of land Carry out more restrictions, it is also relatively complicated by the program of environmental protection inspection and acceptance after putting into operation;And ammoniacal liquor is because its ammonia content is low, volume is big, fortune Defeated inconvenience, operating cost is high and is limited to by what is applied.
For many years, because of improper use, casualty loss is very heavy as caused by liquefied ammonia.Thermal power plant's denitration is according to liquefied ammonia Raw material, its usage amount is very huge, by taking a medium-sized thermal power plant as an example, takes around 10 tons of liquefied ammonia of consumption daily.There is number in the whole nation Thousand thermal power plants, such as all run using liquefied ammonia, only this item equivalent to the liquefied ammonia tank car for there are thousands of 10 tons daily in the whole nation Various regions, for transporting raw material, potential safety hazard can not be ignored.Urea can decompose the characteristic of ammonia processed, with urea decompose or hydrolyze come It is used as instead of liquefied ammonia out of stock, but because technology is immature, the original such as foreign countries' monopolization, plant investment is very big, 300-350kg/h production ammonia abilities Hydrolysis of urea and urea pyrolysis make an investment in 3000-7000 ten thousand, automaticity is low, it is necessary to which periodically a large amount of urea of manual configuration are molten Liquid is stored for production and application;Power consumption, water consume, steam consumption are higher, configure ammonia in solution processes and reveal heavier, solution allocation Room ammonia taste is very heavy, and operating environment is poor.
SCR (Selective Catalytic Reduction, selective catalytic reduction) at home at present, using asking Topic is more and more prominent, and the reaction temperature that SCR techniques need is 300~450 DEG C, and catalytic reaction region is fixed.When boiler less than When being run under the conditions of 20~50% ultra-low loads, catalytic reaction zone is difficult to reach required temperature, when flue-gas temperature is to less than 300 DEG C, Catalyst activity degradation, while because of the influence of reducing agent ammonia, generate ammonium salt blockage catalyst micropore, make catalyst inactivation big Amplitude reduction service life, while the escaping of ammonia that the presence of reducing agent ammonia is also brought, because ammonia it is serious play mist characteristic, influence ring Border quality.
Therefore it is badly in need of one kind without danger, chemical property is stable, and the out of stock reducing agent for being readily transported and storing replaces ammonia, takes off Nitre.
Therefore successively found both at home and abroad for this present situation and make use of ozone or hydrogen peroxide oxidation method, but the method is invested Larger, retrofit work amount is larger, and operating cost is higher, and applicability is not high.Also whether there is the cyanuric acid of ammonia, biological calcium solution etc. Reducing agent novel denitration technique, as non-hazardous out of stock reducing agent, biological calcium solution has the denitration performance for being much better than liquefied ammonia, And because of the chemical property of its stabilized aqueous solution, it is readily transported and stores.
The content of the invention
It is an object of the invention to provide a kind of self catalyzed reduction denitrating system applied to full load denitrating flue gas, with solution The problem of being proposed in certainly above-mentioned background technology.
To achieve the above object, the present invention provides following technical scheme:
A kind of self catalyzed reduction denitrating system applied to full load denitrating flue gas, including boiler body, Benitration reactor and control System processed, by being from left to right sequentially sequentially provided with large-size screen monitors, rear screen, medium temperature reheater, high temperature reheating in the boiler body top Device and high temperature superheater, the boiler body upside are respectively equipped with BIOLOGICAL CALCIUM base reductant low-temperature space delivery pipe and BIOLOGICAL CALCIUM base also Former agent high-temperature region delivery pipe, the BIOLOGICAL CALCIUM base reductant low-temperature space delivery pipe and BIOLOGICAL CALCIUM base reductant high-temperature region delivery pipe one End is respectively equipped with low-temperature space distribution injection apparatus and high-temperature region distribution injection apparatus, and the other end conveys with BIOLOGICAL CALCIUM base reductant Pump connects, and the BIOLOGICAL CALCIUM base reductant delivery pump side is provided with new bio calcium base reductant storage tank, the new bio calcium Base reductant storage tank is connected with BIOLOGICAL CALCIUM base reductant delivery pump by pipeline, the BIOLOGICAL CALCIUM base reductant low-temperature space delivery pipe It is connected with BIOLOGICAL CALCIUM base reductant high-temperature region delivery pipe left end with gases at high pressure, the BIOLOGICAL CALCIUM base reductant low-temperature space conveying Low-temperature space reducing agent regulating valve and high-temperature region are respectively equipped with pipe and the horizontal flue of BIOLOGICAL CALCIUM base reductant high-temperature region delivery pipe Reducing agent regulating valve, the high-temperature region distribution injection apparatus shield between medium temperature reheater after being arranged on, the high-temperature region distribution High-temperature region temperature measuring point is provided with the downside of injection apparatus, the low-temperature space distribution injection apparatus is arranged on medium temperature reheater and high temperature Between reheater, low-temperature space temperature measuring point is provided with the downside of the low-temperature space distribution injection apparatus, the boiler body right-hand member is set Have a rear vertical shaft, it is described after in vertical shaft by being sequentially sequentially provided with low temperature superheater and multiple economizers, the low temperature mistake from top to bottom Rear hoistway temperature measurement point is provided with the upside of hot device, shielding downside after described is provided with one-level import NOXSample point, the boiler body one Side is provided with air preheater, and the air preheater is separately positioned on air inlet and air outlet, the air inlet and boiler sheet Body bottom is connected by blower fan, and the air outlet is connected with rear vertical shaft bottom, and denitration is provided between rear vertical shaft and air preheater Reactor, the Benitration reactor upside are provided with reactor inlet temperatures measurement point, are provided between Benitration reactor and economizer Secondary inlet NOXSample point, secondary exit port NO is provided between Benitration reactor and air preheaterXSample point, the denitration reaction The first catalyst layer, the second catalyst layer and the 3rd catalyst layer, the boiler body side are sequentially provided with device from top to bottom Provided with control system, the control system respectively with high-temperature region reducing agent regulating valve, low-temperature space reducing agent regulating valve, high-temperature region temperature Spend measurement point, low-temperature space temperature measuring point, one-level import NOXSample point, secondary inlet NOXSample point, secondary exit port NOXSampling Point, boiler load sample point, the electrical connection of flue each point temperature sample point.
As the further scheme of the present invention:One-level biology base reductant uses new bio calcium base reductant, and its is effective Out of stock temperature range is 600-1000 DEG C, and the agent of two level self catalyzed reduction uses novel absorbent charcoal base self catalyzed reduction agent, and its is effective Section is 160-400 DEG C, the out of stock cooperation of two-stage, 160-1000 DEG C of temperature covering scope.
As further scheme of the invention:The out of stock temperature range 700-900 of the new bio calcium base reductant ℃。
As further scheme of the invention:The low-temperature space distribution injection apparatus and high-temperature region distribution injection apparatus are equal Arranged using more mouthfuls of shower nozzles and Dual-layer, control reducing agent distribution.
As further scheme of the invention:The low-temperature space distribution injection apparatus and high-temperature region distribution injection apparatus are set There are compressed air or low-pressure steam sleeve pipe, outlet mixing, carry out secondary injection atomization.
As further scheme of the invention:Remote liquid level is provided with the novel active BIOLOGICAL CALCIUM base reductant storage tank Meter and warning device.
Compared with prior art, the beneficial effects of the invention are as follows:The present invention is using adapting to different temperatures scope and front and rear match somebody with somebody The two-stage of conjunction substitutes traditional liquefied ammonia SCR patterns without the out of stock pattern of ammonia, using its wider effective warm area, ensure that each load At a temperature of reducing agent can have preferable activity;By the setting of two level self catalyzed reduction agent, application load section is further widened, Denitration efficiency is ensure that, by controlling biological base reductant flow, enhances system adjustable characteristic.
The present invention has further the advantage that:
1st, the present invention is compared with SNCR, and this patent efficiency 90-95%, the denitrating flue gas of 160-1000 DEG C of scope of temperature is immediately adjustable.
2nd, it is of the invention compared with traditional SCR methods, without ammonia reducing agent, operation more safety and environmental protection.
3rd, the present invention is applied to 600MW units, only 5,000,000 or so is invested, far below traditional SCR denitration 3000-5000 Ten thousand.
4th, plant modification investment is small, simple to operate, and because corollary equipment quantity is few, automaticity is high, and operation is relatively conventional It is simple with liquid.
Brief description of the drawings
Fig. 1 is the structural representation of the self catalyzed reduction denitrating system applied to full load denitrating flue gas.
In figure:1- boiler bodies, 2- large-size screen monitors, shield after 3-, 4- medium temperature reheaters, 5- high temperature reheaters, 6- high temperature superheaters, Vertical shaft after 7-, 8- low temperature superheaters, 9- economizers, 10- Benitration reactors, 11- air preheaters, 12- blower fans, the new lifes of 13- Thing calcium base reductant storage tank, 14- BIOLOGICAL CALCIUM base reductant delivery pumps, 15- BIOLOGICAL CALCIUM base reductant low-temperature space delivery pipes, 16- lifes Thing calcium base reductant high-temperature region delivery pipe, 17- high-temperature regions reducing agent regulating valve, 18- low-temperature space reducing agent regulating valves, 19- high temperature Area's distribution injection apparatus, 20- low-temperature spaces distribution injection apparatus, 21- gases at high pressure, the catalyst layers of 22- first, 23- second are catalyzed Oxidant layer, the catalyst layers of 24- the 3rd, 25- high-temperature regions temperature measuring point, 26- low-temperature space temperature measuring points, hoistway temperature is surveyed after 27- Measure point, 28- reactor inlet temperatures measurement points, 29- one-level imports NOXSample point, 30- secondary inlets NOXSample point, 31- two levels Export NOXSample point, 32- boiler load sample points, 33- flue each point temperature sample points, 34- control systems.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.
Referring to Fig. 1, in the embodiment of the present invention, a kind of self catalyzed reduction denitration system applied to full load denitrating flue gas System, including boiler body 1, Benitration reactor 10 and control system 34, in the top of boiler body 1 by from left to right sequentially according to Secondary to be provided with large-size screen monitors 2, afterwards screen 3, medium temperature reheater 4, high temperature reheater 5 and high temperature superheater 6, the upside of boiler body 1 is respectively Provided with BIOLOGICAL CALCIUM base reductant low-temperature space delivery pipe 15 and BIOLOGICAL CALCIUM base reductant high-temperature region delivery pipe 16, the BIOLOGICAL CALCIUM base is also Former agent low-temperature space delivery pipe 15 and the one end of BIOLOGICAL CALCIUM base reductant high-temperature region delivery pipe 16 are respectively equipped with low-temperature space distribution injection dress 20 and high-temperature region distribution injection apparatus 19 are put, the other end is connected with BIOLOGICAL CALCIUM base reductant delivery pump 14, the BIOLOGICAL CALCIUM base The side of reducing agent delivery pump 14 is provided with new bio calcium base reductant storage tank 13, the new bio calcium base reductant storage tank 13 with BIOLOGICAL CALCIUM base reductant delivery pump 14 is connected by pipeline, the BIOLOGICAL CALCIUM base reductant low-temperature space delivery pipe 15 and BIOLOGICAL CALCIUM base The left end of reducing agent high-temperature region delivery pipe 16 is connected with gases at high pressure 21, the He of BIOLOGICAL CALCIUM base reductant low-temperature space delivery pipe 15 Low-temperature space reducing agent regulating valve 18 and high-temperature region are respectively equipped with the horizontal flue of BIOLOGICAL CALCIUM base reductant high-temperature region delivery pipe 16 Reducing agent regulating valve 17, the high-temperature region distribution injection apparatus 19 shield between 3 and medium temperature reheater 4 after being arranged on, the high temperature The downside of area's distribution injection apparatus 19 is provided with high-temperature region temperature measuring point 25, and the low-temperature space distribution injection apparatus 20 is arranged on medium temperature Between reheater 4 and high temperature reheater 5, the downside of low-temperature space distribution injection apparatus 20 is provided with low-temperature space temperature measuring point 26, The right-hand member of boiler body 1 is provided with rear vertical shaft 7, it is described after in vertical shaft 7 by being sequentially sequentially provided with the He of low temperature superheater 8 from top to bottom Multiple economizers 9, the upside of low temperature superheater 8 are provided with rear hoistway temperature measurement point 27, it is grading provided with one that 3 downsides are shielded after described Mouth NOXSample point 29, the side of boiler body 1 are provided with air preheater 11, the air preheater 11 be separately positioned on into On air port and air outlet, the air inlet is connected with the bottom of boiler body 1 by blower fan 12, the air outlet and the rear bottom of vertical shaft 7 End connection, is provided with Benitration reactor 10 between rear vertical shaft 7 and air preheater 11, the upside of Benitration reactor 10 is provided with reaction Device inlet temperature measurement point 28, secondary inlet NO is provided between Benitration reactor 10 and economizer 9XSample point 30, denitration reaction Secondary exit port NO is provided between device 10 and air preheater 11XSample point 31, in the Benitration reactor 10 from top to bottom successively Provided with the first catalyst layer 22, the second catalyst layer 23 and the 3rd catalyst layer 24, the side of boiler body 1 is provided with control and is System 34, the control system 34 respectively with high-temperature region reducing agent regulating valve 17, low-temperature space reducing agent regulating valve 18, high-temperature region temperature Measurement point 25, low-temperature space temperature measuring point 26, one-level import NOXSample point 29, secondary inlet NOXSample point 30, secondary exit port NOXSample point 31, boiler load sample point 32, flue each point temperature sample point 33 electrically connect.
Out of stock in order to adapt to full load, one-level biology base reductant uses new bio calcium base reductant, and it is effectively out of stock Temperature range is 600-1000 DEG C, and optimal out of stock 700-900 DEG C of temperature range, BIOLOGICAL CALCIUM base reductant starts activation and produced in itself 400-1000 DEG C of free radical temperature range.The agent of two level self catalyzed reduction uses novel absorbent charcoal base self catalyzed reduction agent, and its is effective Section is 160-400 DEG C, the out of stock cooperation of two-stage, 160-1000 DEG C of temperature covering scope, therefore the solution of the present invention is each negative There can be fine activity at a temperature of lotus.
The low-temperature space distribution injection apparatus 20 and high-temperature region distribution injection apparatus 19 are using more mouthfuls of shower nozzles and double up and down Layer arrangement, control reducing agent distribution, and compressed air or low-pressure steam sleeve pipe are provided with, outlet mixing, secondary injection atomization is carried out, Far transmission level meter and warning device are provided with the novel active BIOLOGICAL CALCIUM base reductant storage tank 13.
The present invention operation principle be:Biological calcium based solution is stored in new bio calcium base reductant storage tank 13, according to The boiler load and flue each point temperature that boiler load sample point 32 and flue each point temperature sample point 33 are measured respectively, are being controlled Under system 34 controls, pass through BIOLOGICAL CALCIUM base reductant delivery pump 14, BIOLOGICAL CALCIUM base reductant low-temperature space delivery pipe 15 and BIOLOGICAL CALCIUM Base reductant high-temperature region delivery pipe 16 is respectively delivered in low-temperature space distribution injection apparatus 20 and high-temperature region distribution injection apparatus 19, Mix and spray into flue with compressed gas in exit, then rapid atomization is reacted with smoke contacts, and first activation is in flue Free radical, then free radical and NOXReaction generation CO2、H2O and N2, because flue gas high flow rate and disturbing cause have little time reaction from By base, into Benitration reactor 10 below, urged in the first catalyst layer 22, the second catalyst layer 23 and the 3rd catalyst layer 24 Change effect under, 160-400 DEG C can further with NOXReaction generation CO2、H2O and N2, when free radical is because of NOXContent fluctuation, flue gas When high flow rate and disturbance cause deficiency, C and NO in activated carbon base self catalyzed reduction agentXReaction generation CO2And N2.Further protect Denitration transformation in planta rate is demonstrate,proved.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling Change is included in the present invention.Any reference in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art It is appreciated that other embodiment.

Claims (6)

1. a kind of self catalyzed reduction denitrating system applied to full load denitrating flue gas, including boiler body(1), Benitration reactor (10)And control system(34), it is characterised in that the boiler body(1)By being from left to right sequentially sequentially provided with large-size screen monitors in top (2), rear screen(3), medium temperature reheater(4), high temperature reheater(5)And high temperature superheater(6), the boiler body(1)Upside point She You not BIOLOGICAL CALCIUM base reductant low-temperature space delivery pipe(15)With BIOLOGICAL CALCIUM base reductant high-temperature region delivery pipe(16), the biology Calcium base reductant low-temperature space delivery pipe(15)With BIOLOGICAL CALCIUM base reductant high-temperature region delivery pipe(16)One end is respectively equipped with low-temperature space It is distributed injection apparatus(20)Injection apparatus is distributed with high-temperature region(19), the other end with BIOLOGICAL CALCIUM base reductant delivery pump(14)Even Connect, the BIOLOGICAL CALCIUM base reductant delivery pump(14)Side is provided with new bio calcium base reductant storage tank(13), the new life Thing calcium base reductant storage tank(13)With BIOLOGICAL CALCIUM base reductant delivery pump(14)Connected by pipeline, the BIOLOGICAL CALCIUM base reductant Low-temperature space delivery pipe(15)With BIOLOGICAL CALCIUM base reductant high-temperature region delivery pipe(16)Left end is and gases at high pressure(21)Connection, it is described BIOLOGICAL CALCIUM base reductant low-temperature space delivery pipe(15)With BIOLOGICAL CALCIUM base reductant high-temperature region delivery pipe(16)Horizontal flue in point She You not low-temperature space reducing agent regulating valve(18)With high-temperature region reducing agent regulating valve(17), the high-temperature region is distributed injection apparatus (19)Shield after being arranged on(3)With medium temperature reheater(4)Between, the high-temperature region is distributed injection apparatus(19)Downside is provided with high-temperature region Temperature measuring point(25), the low-temperature space distribution injection apparatus(20)It is arranged on medium temperature reheater(4)And high temperature reheater(5)It Between, the low-temperature space is distributed injection apparatus(20)Downside is provided with low-temperature space temperature measuring point(26), the boiler body(1)Right-hand member Provided with rear vertical shaft(7), the rear vertical shaft(7)It is interior by being sequentially sequentially provided with low temperature superheater from top to bottom(8)With multiple economizers (9), the low temperature superheater(8)Upside is provided with rear hoistway temperature measurement point(27), shield after described(3)Downside is provided with one-level import NOXSample point(29), the boiler body(1)Side is provided with air preheater(11), the air preheater(11)Set respectively Put on air inlet and air outlet, the air inlet and boiler body(1)Bottom passes through blower fan(12)Connection, the air outlet with Vertical shaft afterwards(7)Bottom connects, rear vertical shaft(7)With air preheater(11)Between be provided with Benitration reactor(10), the denitration is anti- Answer device(10)Upside is provided with reactor inlet temperatures measurement point(28), Benitration reactor(10)With economizer(9)Between be provided with two Level import NOXSample point(30), Benitration reactor(10)With air preheater(11)Between be provided with secondary exit port NOXSample point (31), the Benitration reactor(10)The first catalyst layer is inside sequentially provided with from top to bottom(22), the second catalyst layer(23)With 3rd catalyst layer(24), the boiler body(1)Side is provided with control system(34), the control system(34)Respectively with height Warm area reducing agent regulating valve(17), low-temperature space reducing agent regulating valve(18), high-temperature region temperature measuring point(25), low-temperature space temperature survey Amount point(26), one-level import NOXSample point(29), secondary inlet NOXSample point(30), secondary exit port NOXSample point(31), pot Stove load sample point(32), flue each point temperature sample point(33)Electrical connection.
2. the self catalyzed reduction denitrating system according to claim 1 applied to full load denitrating flue gas, it is characterised in that One-level biology base reductant uses new bio calcium base reductant, and effectively out of stock temperature range is 600-1000 DEG C for it, and two level is certainly Catalytic reducer uses novel absorbent charcoal base self catalyzed reduction agent, and its valid interval is 160-400 DEG C, the out of stock cooperation of two-stage, temperature Spend 160-1000 DEG C of covering scope.
3. the self catalyzed reduction denitrating system according to claim 2 applied to full load denitrating flue gas, it is characterised in that 700-900 DEG C of the out of stock temperature range of the new bio calcium base reductant.
4. the self catalyzed reduction denitrating system according to claim 1 applied to full load denitrating flue gas, it is characterised in that The low-temperature space is distributed injection apparatus(20)Injection apparatus is distributed with high-temperature region(19)Use more mouthfuls of shower nozzles and Dual-layer cloth Put, control reducing agent distribution.
5. the self catalyzed reduction denitrating system applied to full load denitrating flue gas according to claim 1 or 4, its feature exist In the low-temperature space is distributed injection apparatus(20)Injection apparatus is distributed with high-temperature region(19)Provided with compressed air or low-pressure steam set Pipe, outlet mixing, carries out secondary injection atomization.
6. the self catalyzed reduction denitrating system according to claim 1 applied to full load denitrating flue gas, it is characterised in that The novel active BIOLOGICAL CALCIUM base reductant storage tank(13)It is interior to be provided with far transmission level meter and warning device.
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