CN103949151B - A kind of box ammonia process flue gas purifying technique - Google Patents

A kind of box ammonia process flue gas purifying technique Download PDF

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Publication number
CN103949151B
CN103949151B CN201410210240.4A CN201410210240A CN103949151B CN 103949151 B CN103949151 B CN 103949151B CN 201410210240 A CN201410210240 A CN 201410210240A CN 103949151 B CN103949151 B CN 103949151B
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nox
flue gas
respiratory box
absorption
ammonia
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CN103949151A (en
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陶俊
陶陶
徐继红
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Huainan City's Bright Moon Environmental Protection Science And Technology Ltd Co
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Huainan City's Bright Moon Environmental Protection Science And Technology Ltd Co
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

A kind of box ammonia process flue gas purifying technique, belongs to fume treatment and technical field of environmental equipment.It is using ammonia as absorbent to be one, and SO in flue gas is absorbed in respiratory box2After NOx, in the parsing gas compartment that one separates with flue gas, NOx accelerates to parse by oxygen air lift, and provides the oxidant of NOX oxidation effect, and gas stripping gas phase oxidation reactant is returned in respiratory box obtains ammonium nitrate by absorption;While oxygen air lift, ammonium sulfite is oxidized to ammonium sulfate, and desulphurization denitration product is the system of ammonium sulfate and ammonium nitrate mixture;The beneficial effects of the invention are as follows:(1) respiratory box unique structure, combination are convenient;(2) multistage absorption parses in time, and the removing of NOx is abundant, and oxidation efficiency is high;(3) parsing of NOx recovery systems, oxidation and the efficient circulation absorbed;(4) by-product sulfur-bearing containing nitre product, value are high;(5) implementation result, desulfurization degree >=98%, denitration rate >=90%, the NOx rate of recovery >=90%.

Description

A kind of box ammonia process flue gas purifying technique
Technical field
The application belongs to fume treatment and technical field of environmental equipment.The present invention relates to a kind of box ammonia process flue gas purifying works Skill, more specifically, it is using ammonia as absorbent to be one, and SO in flue gas is absorbed in respiratory box2And NOx, it is inhaled according to ammonia dynamic The principle of NOx is received and parsed, constructs the parsing gas compartment separated with flue gas, then NOx passes through oxygen air lift and accelerates to solve Analysis, and the oxidant of NOX oxidation effect is provided, gas stripping gas phase oxidation reactant is returned in respiratory box obtains nitric acid by absorption Ammonium;While oxygen air lift, ammonium sulfite is oxidized to ammonium sulfate, and desulphurization denitration product is ammonium sulfate and ammonium nitrate mixture System.
Background technology
Current flue gas desulfurization and denitrification is mainly using " wet flue gas desulfurization (Wet-FGD) and NH3Selective catalytic reduction (SCR) technology denitration ", the removing to sulfureous in flue gas, nitrogen pollutant are carried out respectively in different devices and flow, are occupied Big quantity space consumes ammonia, and by-product gypsum value is low, and investment is big, and operating cost is high.The presence of these problems restricts the method at me The popularization and application of state.It would therefore be highly desirable to the high-efficiency desulfurization denitration technology for being unified in and being carried out in same technological process is researched and developed, especially It is the technique and equipment for not consuming ammonia and NOx being recycled.
In the prior art, utility model patent ZL201020642632.5 discloses a kind of smoke purifier, it It is related to technical field of environmental equipment, its absorption tower upper end is provided with exhaust outlet, and the lower end of exhaust outlet is provided with demister, demisting Device lower end is provided with netted deflector, and the lower end of netted deflector is provided with vaporific nozzle, and absorb the bottom of the tower is provided with absorbing liquid; The lower end side on absorption tower is provided with air inlet, and absorb the bottom of the tower is provided with note ammonia point, and note ammonia point upper end is provided with and absorption tower The absorption fluid supply pump of inside connection absorbs fluid supply pump and connects respectively with drying-granulating system, vaporific nozzle and netted deflector It connects.The utility model is by (NH4 )2SO3Solution carries out deep oxidation, and compared with traditional ammonia process, energy consumption decreases, clean-up effect Preferably, but only it is desulfurization, the function of not possessing denitration.
202620999 U of patent CN disclose a kind of desulfurization and denitrification integral flue gas purification system, including being connected with each other Flue gas input system, smoke absorption cleaning system and neat stress exhaust system, wherein, further include and the flue gas input system The flue gas oxidative system being connected, the concentration systems being connected with flue gas input system and the slurry being connected with the concentration systems Liquid treating system, the slurries oxidative system being connected with smoke absorption cleaning system and absorbent transport system.The utility model It realizes the desulfurization and denitrification integral of flue gas, and late-stage products is made full use of, but system complex, it is particularly straight to flue gas It is poorly efficient to connect mode of oxidizing, and traditional aerating oxidation mode and poorly efficient is taken to the oxidation of liquid phase sulfite potassium.
The content of the invention
Big, operating cost height is invested for Wet-FGD+SCR combination desulphurization denitrations, need to consume and be worth higher ammonia, by-product It is worth the shortcomings that low, the application proposes a kind of box ammonia process flue gas purifying technique, and the system design is reasonable, reaches dedusting, simultaneously Desulphurization denitration and the purpose for recycling NOx, system investments are few, stable and reliable operation, resources and energy consumption are few, and by-product value is high.
A kind of box ammonia process flue gas purifying technique, it is using ammonia as absorbent to be one, and SO in flue gas is absorbed in respiratory box2 And NOx, according to the principle of ammonia Dynamic Absorption and parsing NOx, the parsing gas compartment separated with flue gas is constructed, then NOx Accelerate to parse by oxygen air lift, and the oxidant of NOX oxidation effect is provided, gas stripping gas phase oxidation reactant returns to respiratory box It is middle that ammonium nitrate is obtained by absorption;While oxygen air lift, ammonium sulfite is oxidized to ammonium sulfate, and desulphurization denitration product is ammonium sulfate With the system of ammonium nitrate mixture;Flue gas input system, smoke absorption system, flue gas demister system including interconnection and net Change flue gas output system, further include the slurry spraying system being connected with the smoke absorption system, absorbent addition system, also Recovery system including the NOx recovery systems being connected with slurry spraying system and ammonium sulfate and ammonium nitrate products;Further include with The flushing water system that the flue gas demister system is connected;
The flue gas input system by input flue, flue blower unit into;
The smoke absorption system is made of respiratory box, and the absorption upper box part is provided with slurries spray thrower, and lower part is set There are partition plate, liquid-droping groove, liquid phase region, air pocket is collectively formed in partition plate, downspout, liquid phase region and respiratory box cylinder wall surface;The liquid phase Area lower end is provided with oxygen distribution ware;The liquid phase region lower end is additionally provided with underflow collecting tank;The oxygen distribution ware lower end is set It is equipped with leakage collection port;
The flue gas demister system is made of demister, and the demister gas inlet is up disposed with level-one demisting Layer, level-one demisting layer rinse water layer, two level demisting layer and two level demisting layer and rinse water layer, and gas inlet lower part is the storage of water Area;
The purifying smoke output system is made of chimney;
The slurry spraying system is made of slurries spray thrower in slurry circulating pump, case;
The ammonia absorbent adds in system and is made of ammonia absorbent slot, ammonia pump;
The NOx recovery systems by respiratory box air pocket, oxygen mixer, oxidation pipeline air blower and respiratory box in Oxygen distribution ware forms;
The recovery system of the ammonium sulfate and ammonium nitrate products is pumped by underflow liquid pump, filter, filtrate receiver and output of products Composition;
The flushing water system is made of the flushing water layer in the memory block of demister water, flush water pump and demister.
Further:
The absorption upper box part is provided with slurries spray thrower, and lower part is provided with partition plate, liquid-droping groove, liquid phase region, partition plate, descending liquid Air pocket is collectively formed to collect the NOx gases of absorbing liquid Dynamic Absorption in pipe, liquid phase region and respiratory box cylinder wall surface;The liquid phase region Lower end be provided with oxygen distribution ware so that by oxygen be evenly distributed, make liquid phase sulfite ammonium oxidation and NOx accelerated Parsing;The liquid phase region lower end is additionally provided with underflow collecting tank, with sharp Product recycling;
The NOx recovery systems by respiratory box air pocket, oxygen mixer, oxidation pipeline air blower and respiratory box in Oxygen distribution ware forms, and forms parsing, oxidation and the cycling absorbed, and the oxidation efficiency of NOx is high, absorbs abundant.
Using a kind of box ammonia process flue gas purifying technique of the application, comprise the following steps:
(1) flue gas inputs
Flue gas is inputted by input flue, and absorption system is sent into through flue blower;
(2) absorption of flue gas
Respiratory box gas inlet is sent into through flue blower, by slurries spray thrower spray-absorption, warp in respiratory box Cross the absorption of plural serial stage respiratory box, dust, SO in flue gas2It is absorbed with NOx, then demister demisting is sent to purify;
(3) flue gas demisting purifies
Flue gas after desulphurization denitration is sent into demister gas inlet, successively by level-one demisting layer, level-one in demister Demisting layer rinses water layer, two level demisting layer and two level demisting layer and rinses water layer, the emptying of smoke-purifying pneumatic transmission flue gas;
(4) emptying of flue gas
After flue gas demisting, purifying smoke is emptied by chimney;
(5) the cycling of slurries
Dust, SO are absorbed in respiratory box2With the slurries of NOx, into the lower space of respiratory box, under respiratory box The oxidation reaction of ammonium sulfite and the analytic function of NOx occur for portion space liquid phase region, and the slurries after parsing regeneration are followed by slurries The slurries spray thrower spray of ring pumping respiratory box upper space realizes the cycling of slurries;
(6) addition of ammonia absorbent
Ammonia absorbent add in ammonia absorbent slot, ammonia absorbent by the water memory block of demister come process water dilution, by ammonia It is pumped into and is mixed with slurries, into the slurries spray thrower in respiratory box;
(7) NOx is recycled
By the oxygen of oxygen distribution ware, on the one hand make liquid phase sulfite ammonium oxidation generation ammonium sulfate, on the other hand make The NOx of Dynamic Absorption obtains accelerating parsing, and provides the oxidant of NOX oxidation, oxygen is filled into oxygen mixer, by oxygen Change the pressurization of pipeline air blower and realize the cycling that NOX oxidation absorbs;
(8) recycling of ammonium sulfate and ammonium nitrate products
Underflow collecting tank is additionally provided in the lower liquid phase area lower end of respiratory box, the underflow liquid collected in underflow collecting tank It is filtered by underflow liquid pump delivery of filtered machine, filtering solid phase is useless solid discharge;Filtering liquid phase is mainly ammonium sulfate and ammonium nitrate products, It is collected by filtrate receiver, is pumped and exported by output of products;
(9) demisting and the balance of water
Demister lower storage process water rinses water layer by the two level demisting layer in flushing water pumping demister and level-one is removed Mist layer rinses water layer;In respiratory box, flue-gas temperature is lowered, and moist part, which evaporates, in liquid phase is carried over absorption system, absorbs The moisture that system requires supplementation with adds in demister by process water, is absorbed by demister lower storage process water by process water pumping ammonia Agent slot and then absorption system is sent to, so as to fulfill the balance of water.
The step (1) (2) (3) (4) is the access of flue gas, dust, SO in flue gas2It is inhaled with NOx in step (2) It receives, using step (3) demisting, purifying smoke emptying.
In the step (2), flue gas passes through respiratory box, dust, SO in flue gas2Absorbed with NOx, step (2) into , it is necessary to the regeneration cycle of step (5) slurries in row, ensured continuous absorption power, it is necessary to step (6) ammonia absorbent it is continuous Addition has ensured final assimilation effect;
In the step (5), the cycling of slurries constantly provides the NOx of recycling for step (7), step (7) and makes slurries It is regenerated, has ensured continuous absorption power;The step (8) constantly removes product, step (6) ammonia absorbent it is continuous Addition provides absorption raw material.
The step (9) provides safeguard for step (3), and realizes the water balance of step (2) absorption system.
In addition, under the oxygen distribution ware of respiratory box bottom, equipped with leakage collection port, it is connected with filtrate receiver, collects oxygen point The liquid that cloth device leaks down;Output of products pump is provided with branch, and excessive filtrate is made to return to absorption system.
The application is embodied in the following:
(1) system design is reasonable, reaches dedusting, simultaneous SO_2 and NO removal and the purpose for recycling NOx, system investments are few, fortune Row is reliable and stable, resources and energy consumption is few.
(2) absorb upper box part and be provided with slurries spray thrower, lower part is provided with partition plate, liquid-droping groove, liquid phase region, partition plate, descending liquid Air pocket is collectively formed to collect the NOx gases of absorbing liquid Dynamic Absorption in pipe, liquid phase region and respiratory box cylinder wall surface;The liquid phase region Lower end be provided with oxygen distribution ware so that by oxygen be evenly distributed, make liquid phase sulfite ammonium oxidation and NOx accelerated Parsing;The liquid phase region lower end is additionally provided with underflow collecting tank, with sharp Product recycling;Respiratory box unique structure, combination are convenient.
(3) NOx recovery systems by respiratory box air pocket, oxygen mixer, oxidation pipeline air blower and respiratory box in Oxygen distribution ware forms, and forms parsing, oxidation and the cycling absorbed, and the oxidation efficiency of NOx is high, absorbs abundant.
(4) by-product sulfur-bearing containing nitre product, value are high.
(5) implementation result, desulfurization degree >=98%, denitration rate >=90%, the NOx rate of recovery >=90%.
Description of the drawings
Attached drawing 1 is a kind of box ammonia process flue gas purifying technique schematic diagram of the application
1- inputs flue, 2- air blowers, 3- respiratory boxes, 4- demisters, 5- level-one demistings layer, 6- level-one demisting layers in Fig. 1 Water layer, 7- two level demisting layers are rinsed, 8- two level demistings layer rinses water layer, 9- flush water pumps, 10- technique water pumps, 11- chimneys, 12- Ammonia absorbent slot, 16- slurry circulating pumps, 27- ammonia pumps;A- flue gases, B- purifying smokes, C- process waters, D- ammonia absorbents.
Attached drawing 2 is a kind of box ammonia process flue gas purifying technique system structure diagram of the application
1- inputs flue, 2- air blowers, 3- respiratory boxes, 4- demisters, 5- level-one demistings layer, 6- level-one demisting layers in Fig. 2 Water layer, 7- two level demisting layers are rinsed, 8- two level demistings layer rinses water layer, 9- flush water pumps, 10- technique water pumps, 11- chimneys, 12- Ammonia absorbent slot, 13- filters, 14- filtrate receivers, 15- output of products pump, 16- slurry circulating pumps, 17- oxygen mixers, 18- Oxidation pipeline air blower, 19- slurries spray throwers, 20- partition plates, 21- downspouts, 22- underflow liquid collecting tanks, 23- leakage collection ports, 24- oxygen distribution wares, 25- liquid phase regions, 26- air pockets, 27- ammonia pumps, 28- underflow liquid pumps;A- flue gases, B- purifying smokes, C- techniques Water, D- ammonia absorbents, E- oxygen, F- ammonium sulfate and ammonium nitrate products, G- give up solid.
Specific embodiment
Embodiment 1
As shown in Figures 1 and 2, a kind of box ammonia process flue gas purifying technique, it is using ammonia as absorbent, in respiratory box to be one SO in middle absorption flue gas2And NOx, according to the principle of ammonia Dynamic Absorption and parsing NOx, construct a resolution gas separated with flue gas Body space, then NOx accelerates to parse by oxygen air lift, and provides the oxidant of NOX oxidation effect, air lift gas phase oxidation Product returns in respiratory box and obtains ammonium nitrate by absorption;While oxygen air lift, ammonium sulfite is oxidized to ammonium sulfate, and desulfurization takes off Nitre product is the system of ammonium sulfate and ammonium nitrate mixture;Flue gas input system, smoke absorption system including interconnection, cigarette Gas demister system and purifying smoke output system further include the slurry spraying system being connected with the smoke absorption system, inhale It receives agent and adds in system, further include time of the NOx recovery systems being connected with slurry spraying system and ammonium sulfate and ammonium nitrate products Receipts system;Further include the flushing water system being connected with the flue gas demister system;
The flue gas input system is made of input flue 1, flue air blower 2;
The smoke absorption system is made of respiratory box 3, and 3 top of respiratory box is provided with slurries spray thrower 19, lower part Partition plate 20, liquid-droping groove 21, liquid phase region 25 are provided with, partition plate 20, downspout 21, liquid phase region 25 and 3 cylinder wall surface of respiratory box are common Form air pocket 26;25 lower end of liquid phase region is provided with oxygen distribution ware 24;25 lower end of liquid phase region is additionally provided with underflow receipts Collect slot 22;24 lower end of oxygen distribution ware is provided with leakage collection port 23;
The flue gas demister system is made of demister 4, and 4 gas inlet of demister is up disposed with level-one and removes Mist layer 5, level-one demisting layer rinse water layer 6, two level demisting layer 7 and two level demisting layer and rinse water layer 8, and gas inlet lower part is water Memory block;
The purifying smoke output system is made of chimney 11;
The slurry spraying system is made of slurries spray thrower 19 in slurry circulating pump 16, case;
The ammonia absorbent adds in system and is made of ammonia absorbent slot 12, ammonia pump 27;
The NOx recovery systems are by air pocket 26, oxygen mixer 17, oxidation pipeline air blower 18 and the suction in respiratory box 3 The oxygen distribution ware 24 received in case 3 forms;
The recovery system of the ammonium sulfate and ammonium nitrate products is by underflow liquid pump 28, filter 13, filtrate receiver 14 and product Rear pump 15 forms;
The water system of rinsing is rushed by the level-one demisting layer in the memory block of water of demister 4, flush water pump 9, demister Wash water layer 6, two level demisting layer rinse water layer 8 and technique water pump 10 forms.
Further:
3 top of respiratory box is provided with slurries spray thrower 19, and lower part is provided with partition plate 20, liquid-droping groove 21, liquid phase region 25, Air pocket 26 is collectively formed to collect absorbing liquid Dynamic Absorption in partition plate 20, downspout 21, liquid phase region 25 and 3 cylinder wall surface of respiratory box NOx gases;25 lower end of liquid phase region be provided with oxygen distribution ware 24 so that by oxygen be evenly distributed, make sulfurous in liquid phase Sour ammonium oxidation and NOx obtain accelerating parsing;25 lower end of liquid phase region is additionally provided with underflow collecting tank 22, with sharp Product recycling;
The NOx recovery systems are by air pocket 26, oxygen mixer 17, oxidation pipeline air blower 18 and the absorption in respiratory box Oxygen distribution ware 24 in case forms, and forms parsing, oxidation and the cycling absorbed, and the oxidation efficiency of NOx is high, absorbs abundant.
Using a kind of box ammonia process flue gas purifying technique of the application, comprise the following steps:
(1) flue gas inputs
Flue gas A is inputted by input flue 1, is pressurized through flue air blower 2 and is sent into absorption system;
(2) absorption of flue gas
It is pressurized through flue air blower 2 and is sent into 3 gas inlet of respiratory box, suction is sprayed by slurries spray thrower 19 in respiratory box 3 It receives, by the absorption of plural serial stage respiratory box 3, dust, SO in flue gas2It is absorbed with NOx, then 4 demisting of demister is sent to purify;
(3) flue gas demisting purifies
Flue gas after desulphurization denitration is sent into 4 gas inlet of demister, passes through level-one demisting layer 5, one successively in demister 4 Grade demisting layer rinses water layer 6, two level demisting layer 7 and two level demisting layer and rinses water layer 8, and purifying smoke B send the emptying of flue gas;
(4) emptying of flue gas
After flue gas demisting, purifying smoke B is emptied by chimney 11;
(5) the cycling of slurries
Dust, SO are absorbed in respiratory box 32With the slurries of NOx, into the lower space of respiratory box 3, in respiratory box 3 Lower space liquid phase region 25 occur the oxidation reaction of ammonium sulfite and the analytic function of NOx, the slurries after parsing regeneration by Slurry circulating pump 16 send the slurries spray thrower 19 of 3 upper space of respiratory box to spray, and realizes the cycling of slurries;
(6) addition of ammonia absorbent
Ammonia absorbent D adds in ammonia absorbent slot 12, the process water dilution that ammonia absorbent D is come by the water memory block of demister 4, It is pumped by ammonia pump 27 and is mixed with slurries, into the slurries spray thrower 19 in respiratory box 3;
(7) NOx is recycled
By the oxygen of oxygen distribution ware 24, on the one hand make liquid phase sulfite ammonium oxidation generation ammonium sulfate, on the other hand The NOx of Dynamic Absorption is made to obtain accelerating parsing, and provides the oxidant of NOX oxidation, oxygen is filled into oxygen mixer 17 E, the cycling for realizing that NOX oxidation absorbs of being pressurizeed by oxidation pipeline air blower 18;
(8) recycling of ammonium sulfate and ammonium nitrate products
25 lower end of lower liquid phase area of respiratory box 3 is provided with underflow collecting tank 22, is collected in underflow collecting tank 22 Underflow liquid is filtered by 28 delivery of filtered machine 13 of underflow liquid pump, and filtering solid phase is useless solid G discharges;Filtering liquid phase be mainly ammonium sulfate and Ammonium nitrate products F is collected by filtrate receiver 14, by 15 output of output of products pump;
(9) demisting and the balance of water
Demister lower storage process water is sent the two level demisting layer in demister 4 to rinse water layer 8 and one by flush water pump 9 Grade demisting layer rinses water layer 6;In respiratory box 3, flue-gas temperature is lowered, and moist part evaporation, which is carried over absorbing, in liquid phase is System, the moisture that absorption system requires supplementation with adds in demister 4 by process water C, by 4 lower storage process water of demister by process water Pump 10 send ammonia absorbent slot 12 and then is sent to absorption system, so as to fulfill the balance of water.
Three respiratory box tandem compounds are taken, ammonia absorbent is in parallel to add in each respiratory box.
Using the application box ammonia process flue gas purifying technique, desulfuration efficiency 98.4%, denitration efficiency 91.5%, NOx recycling Rate 91.5%.
Embodiment 2
As shown in Figures 1 and 2, a kind of box ammonia process flue gas purifying technique, equipment are set and the same embodiment of implementation steps 1, except arranged below and step:
Four respiratory box tandem compounds are taken, ammonia absorbent is in parallel to add in each respiratory box.
Using the application box ammonia process flue gas purifying technique, desulfuration efficiency 99.0%, denitration efficiency 92.8%, NOx recycling Rate 92.8%.
Embodiment 3
As shown in Figures 1 and 2, a kind of box ammonia process flue gas purifying technique, equipment are set and the same embodiment of implementation steps 1, except arranged below and step:
Three respiratory box tandem compounds are taken, ammonia absorbent is added to the 3rd babinet, and the slurries of the 3rd babinet are added to Two babinets, the slurries of the second babinet are then added to the first babinet, by the first babinet lower end underflow liquid collecting tank output slurries production production Product.
Using the application box ammonia process flue gas purifying technique, desulfuration efficiency 98.6%, denitration efficiency 92.0%, NOx recycling Rate 92.0%.
The beneficial effects of the invention are as follows:(1) system design is reasonable, reaches dedusting, simultaneous SO_2 and NO removal and recycles NOx's Purpose, system investments are few, stable and reliable operation, resources and energy consumption are few;Respiratory box unique structure, combination are convenient.(2) it is multistage to inhale It receives, parses in time, the removing of NOx is abundant, and oxidation efficiency is high;(3) parsing of NOx recovery systems, oxidation and the efficient circulation absorbed; (4) by-product sulfur-bearing containing nitre product, value are high;(5) implementation result, desulfurization degree >=98%, denitration rate >=90%, NOx rate of recovery >= 90%.
The application is not limited to the above embodiment, made any to the above embodiment aobvious of those skilled in the art and The improvement or change being clear to, all without departing from the design of the present invention and the protection domain of appended claims.

Claims (1)

1. a kind of box ammonia process flue gas purifying technique, it is characterised in that:It is using ammonia as absorbent to be one, is absorbed in respiratory box SO in flue gas2After NOx, in the parsing gas compartment that one separates with flue gas, then NOx accelerates to solve by oxygen air lift Analysis, and the oxidant of NOX oxidation effect is provided, gas stripping gas phase oxidation reactant is returned in respiratory box obtains nitric acid by absorption Ammonium;While oxygen air lift, ammonium sulfite is oxidized to ammonium sulfate, and desulphurization denitration product is ammonium sulfate and ammonium nitrate mixture System;
Comprise the following steps:
(1) flue gas inputs
Flue gas is inputted by input flue, and absorption system is sent into through flue blower;
(2) absorption of flue gas
Respiratory box gas inlet is sent into through flue blower, by slurries spray thrower spray-absorption in respiratory box, through excessive The absorption of grade series connection respiratory box, dust, SO in flue gas2It is absorbed with NOx, then demister demisting is sent to purify;
(3) flue gas demisting purifies
Flue gas after desulphurization denitration is sent into demister gas inlet, successively by level-one demisting layer, level-one demisting in demister Layer rinses water layer, two level demisting layer and two level demisting layer and rinses water layer, the emptying of smoke-purifying pneumatic transmission flue gas;
(4) emptying of flue gas
After flue gas demisting, purifying smoke is emptied by chimney;
(5) the cycling of slurries
Dust, SO are absorbed in respiratory box2It is empty in the lower part of respiratory box into the lower space of respiratory box with the slurries of NOx Between liquid phase region occur the oxidation reaction of ammonium sulfite and the analytic function of NOx, the slurries after parsing regeneration are by slurry circulating pump The slurries spray thrower of respiratory box upper space is sent to spray, realizes the cycling of slurries;
(6) addition of ammonia absorbent
Ammonia absorbent add in ammonia absorbent slot, ammonia absorbent by the water memory block of demister come process water dilution, pumped by ammonia pump Enter and mixed with slurries, into the slurries spray thrower in respiratory box;
(7) NOx is recycled
By the oxygen of oxygen distribution ware, on the one hand make liquid phase sulfite ammonium oxidation generation ammonium sulfate, on the other hand make dynamic The NOx of absorption obtains accelerating parsing, and provides the oxidant of NOX oxidation, oxygen is filled into oxygen mixer, by oxidation tube The cycling that NOX oxidation absorbs is realized in road air blower pressurization;
(8) recycling of ammonium sulfate and ammonium nitrate products
Underflow collecting tank is additionally provided in the lower liquid phase area lower end of respiratory box, the underflow liquid collected in underflow collecting tank is by dense Slurries pump delivery of filtered machine filtering, filtering solid phase are useless solid discharge;It is mainly ammonium sulfate and ammonium nitrate products to filter liquid phase, by filtering Liquid bath is collected, and is pumped and exported by output of products;
(9) demisting and the balance of water
Demister lower storage process water rinses water layer and level-one demisting layer by the two level demisting layer in flushing water pumping demister Rinse water layer;In respiratory box, flue-gas temperature is lowered, and moist part, which evaporates, in liquid phase is carried over absorption system, absorption system The moisture required supplementation with adds in demister by process water, demister lower storage process water by process water pump ammonia absorbent slot into And absorption system is sent to, so as to fulfill the balance of water.
CN201410210240.4A 2014-05-14 2014-05-14 A kind of box ammonia process flue gas purifying technique Expired - Fee Related CN103949151B (en)

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CN106115738A (en) * 2016-06-16 2016-11-16 济南冶金化工设备有限公司 Ammonia type flue gas desulfurizing denitration waste liquid enters ammonium sulfate device and produces joint product system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101053747A (en) * 2007-04-30 2007-10-17 武汉凯迪电力环保有限公司 Simultaneously desulfurization and denitration wet ammonia flue gas cleaning technology and system thereof
CN102512927A (en) * 2011-12-31 2012-06-27 艾淑艳 Integrated flue gas desulfurizing and denitrating purification system and purification technology for same
CN203990296U (en) * 2014-05-14 2014-12-10 淮南市明月环保科技有限责任公司 A kind of box ammonia process flue gas purifying system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003176713A (en) * 2001-12-11 2003-06-27 Daihatsu Diesel Mfg Co Ltd Exhaust gas treating equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101053747A (en) * 2007-04-30 2007-10-17 武汉凯迪电力环保有限公司 Simultaneously desulfurization and denitration wet ammonia flue gas cleaning technology and system thereof
CN102512927A (en) * 2011-12-31 2012-06-27 艾淑艳 Integrated flue gas desulfurizing and denitrating purification system and purification technology for same
CN203990296U (en) * 2014-05-14 2014-12-10 淮南市明月环保科技有限责任公司 A kind of box ammonia process flue gas purifying system

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