CN105032173A - Device and process of ammonia-soda-process combined desulfurization and denitrification - Google Patents

Device and process of ammonia-soda-process combined desulfurization and denitrification Download PDF

Info

Publication number
CN105032173A
CN105032173A CN201510199847.1A CN201510199847A CN105032173A CN 105032173 A CN105032173 A CN 105032173A CN 201510199847 A CN201510199847 A CN 201510199847A CN 105032173 A CN105032173 A CN 105032173A
Authority
CN
China
Prior art keywords
pump
ammonia
flue gas
desulphurization denitration
soda
Prior art date
Application number
CN201510199847.1A
Other languages
Chinese (zh)
Inventor
张少篪
Original Assignee
张少篪
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 张少篪 filed Critical 张少篪
Priority to CN201510199847.1A priority Critical patent/CN105032173A/en
Publication of CN105032173A publication Critical patent/CN105032173A/en

Links

Classifications

    • Y02A50/2344

Abstract

The invention relates to the field of industrial flue gas pollution treatment and especially relates to a device and a process of ammonia-soda-process combined desulfurization and denitrification used in coal-fired industries such as metallurgical industry, thermal power plant and the like. The ammonia-soda-process combined desulfurization and denitrification device includes a flue gas feeding system, a flue gas absorption system and a purified flue gas discharge system and also includes a catalyst system, a slurry preparing system, a replacement system and a product recycle system. The process particularly includes the following steps: (1) filtration and pressurization; (2) desulfurization and denitrification; (3) demisting; (4) clean flue gas discharge; (5) preparation and regeneration of ammonia water; and (6) product recycling. The device and the process can ensure comprehensive desulfurization efficiency to be higher than 98%, denitrification efficiency to be higher than 80%, emission concentration of SO2 in flue gas to be lower than 35 mg/Nm<3> and emission concentration of NOx to be lower than 50 mg/Nm<3>. Water for desulfurization and denitrification are completely circulated in closed loop so that the device and the process are free of secondary pollution and are free of spray nozzle blocking. The system is higher than 98% in normal operation rate.

Description

A kind of ammonia-soda process combined desulfurization and denitration device and technique

Technical field

The present invention relates to industrial smoke pollution control field, particularly a kind of ammonia-soda process combined desulfurization and denitration device for the coal-burning utilities such as metallurgy industry, thermal power plant and technique.

Background technology

China contains very abundant coal resources, is also coal production state maximum in the world and country of consumption.And in China, the coal of about 84% is directly burnt.A large amount of fire coals, causes the air pollution of China based on coal smoke type, creates a large amount of SO2 and N0x, and along with the fast development of China's economy, the discharge capacity of China SO2 occupies second place of the world, and NOx discharge is also in sustainable growth.The SO2 discharged by coal burning account for that 85%, NOx of total release accounts for total release 60%, the acid rain amount caused by the two accounts for 82% of total acid rainfall.The environmental pollutions such as the acid rain that these pollutants cause, greenhouse effects and depletion of the ozone layer, seriously have impact on the living environment of the mankind, cause the great attention of country, carry out to flue gas the vital task that desulphurization denitration has become China.

Current flue gas desulfurization and denitrification technology is all very ripe, desulfurization mainly adopts limestone-gypsum method and ammonia process, denitration adopts SCR technology, and desulfurization method of limestone-gypsum exists that desulfuration efficiency is low, scaling and clogging, influential system stable operation, ammonia process of desulfurization efficiency is high, can not scale formation be produced, can ensure that desulfurizing tower long-term stability is run, but liquefied ammonia belong to Hazardous Chemical Substances, movement requirement is high, and liquefied ammonia desulphurization cost is higher.SCR denitration technical requirement flue-gas temperature 300-420 DEG C, energy consumption is higher, the independent desulphurization and denitration technique of many employings in actual production, but be used alone desulphurization and denitration technology, equipment is complicated, and floor space is large, investment and operating cost high, use desulfurization and denitrification integral equipment and process then compact conformation, investment and operating cost low, so research high-efficiency desulfurization denitrification integral process becomes the focus of Chinese scholars concern.Current combined desulfurization and denitration technology activated carbon method, SNOX technique, NOXSO technique, electronic beam method are comparatively ripe, but constrain its large-scale promotion application because operating cost is higher.

In numerous method, the ammonia process of desulfurization is because its desulfuration efficiency is high, water consumption is few, the advantages such as non-secondary pollution are widely adopted, and this method also has certain denitration effect while guarantee desulfurization, because in flue gas, NOx component more than 90% is NO, and NO is insoluble in water, this just causes common washing method denitration efficiency lower, do not reach environmental requirement, therefore need badly and research and develop a kind of high-efficiency desulfurization denitration technology, particularly do not consume ammonia and technique and the device of NOx can be reclaimed.

Summary of the invention

The present invention, in order to make up the defect of prior art, provides that a kind of structure is simple, system investments is few, the ammonia-soda process combined desulfurization and denitration device of stable and reliable operation and technique.

The present invention is achieved through the following technical solutions:

A kind of device of ammonia-soda process combined desulfurization and denitration, comprise flue gas input system, smoke absorption system and purifying smoke output system, it is characterized in that: also comprise antigravity system, serum producing system, exchange system and Product Collection System, described flue gas input system comprises the sack cleaner, flue air blast and the baffle door I that connect successively, described smoke absorption system is made up of desulphurization denitration tower, described baffle door I is connected with the air inlet of desulphurization denitration tower, described purifying smoke output system is made up of baffle door II and chimney, described baffle door II is connected with the gas outlet of desulphurization denitration tower, described antigravity system comprises catalyst tank and catalyst transport pump, described serum producing system comprises the quick lime storehouse connected successively, belt weigher, pulping tank forms, described exchange system comprises the delivery pump connected successively, regenerating tank and gypsum pump, described pulping tank is connected with delivery pump, described Product Collection System comprises the cyclone connected successively, vacuum filtering and dewatering machine, gypsum storehouse.

Set gradually three grades of spraying layers and two-stage demister above described desulphurization denitration tower, described spraying layer, by distributing pipe network and nozzle forms, adopts glass steel material; Demister is arranged on the top of spraying layer, is connected with technique water pump, and demist fresh water (FW) is pumped into demister through fresh water (FW), and carry out to flue gas the droplet that demist carries secretly in order to be separated neat stress, demister exiting flue gas droplet concentration is not more than 75mg/Nm 3(butt), ensures under 100% flue gas load, and the pressure drop of whole two-stage demister is lower than 120Pa; Be provided with slurry pool and agitator below desulphurization denitration tower, described slurry pool is connected with spraying layer by slurry circulating pump, and the ammoniacal liquor in slurry pool is delivered to spraying layer, and described slurry pool is also connected with oxidation fan, by HSO unoxidized in the slurries of slurry pool 3-and SO 3 2-be oxidized to SO 4 2-.

Described baffle door I and baffle door II are controlled to open by seal fan.

Described slurry pool is connected with tank used for storing ammonia by aqua ammonia pump, a small amount of ammonia taken away toward supplementing water steam in desulphurization denitration tower and gypsum by aqua ammonia pump.

Described catalyst transport pump is connected with slurry pool, and the catalyst be contained in catalyst tank is pumped into slurry pool by catalyst transport, and described catalyst is the situation being insoluble in water in order to solve NO, and object is that NO is oxidized to NO 2, to improve NOx oxidizability, improve the denitration efficiency of ammoniacal liquor.

Described regenerating tank is connected with cyclone by gypsum pump, the gypsum slurries that regenerative response generates carries out preliminary hydro-extraction, gained cyclone filtrate returns desulphurization denitration tower, described regenerating tank is connected with desulphurization denitration tower bottom by slush pump, the saturated slurries of desulphurization denitration tower bottom are delivered in regenerating tank by slush pump, react with the lime stone slurry in regenerating tank, regenerate absorbing liquid, the ammoniacal liquor after regeneration is pumped into slurry circulating pump by absorbent and again recycles.

Described desulphurization denitration tower is connected with accident slurry pool, described accident slurry pool is divided into depositing reservoir and clear water reserviors two parts, depositing reservoir connects with slurry pool, clear water reserviors are connected with desulphurization denitration tower by clarified water pump, and when desulphurization denitration tower breaks down, denitration Desulfurization tower slurry enters depositing reservoir, clarified solution after clarification enters clear water reserviors, clear water reserviors arrange agitator, prevent gypsum deposition, and clarified solution returns desulphurization denitration tower by clarified water pump.

Utilize said apparatus to carry out desulphurization denitration, adopt SO2 and NOx in circulation ammonia-soda process absorption flue gas, it is characterized in that: specifically comprise the steps:

(1) supercharging is filtered: former flue gas enters sack cleaner Chalk-dust filtering through input flue, and then carry out supercharging through flue air blast, the flue gas after supercharging sends into desulphurization denitration tower by baffle door I;

(2) desulphurization denitration: the catalyst of the ammoniacal liquor in slurries district and catalyst pump conveying is squeezed into spraying layer by slurry circulating pump, spraying layer ejection absorbent is by the SO in flue gas 2and removal of nitrogen oxide;

(3) demist: demist fresh water (FW) enters demister by technique water pump, will carry out demist by gained flue gas after desulphurization denitration process;

(4) neat stress exports: the neat stress after demist enters air by baffle door II and chimney successively;

(5) preparation of ammoniacal liquor and regeneration: the ammonium sulfate generated after step (2) flue gas desulfurization and denitrification and ammonium sulfite are sent in regenerating tank by slush pump, to react generation ammoniacal liquor with the lime stone slurry in regenerating tank, the ammoniacal liquor of generation is pumped into slurry circulating pump by absorbent and again recycles;

(6) Product recycling: the gypsum slurries generated in step (5) reaction is pumped into cyclone by gypsum and carries out preliminary hydro-extraction, cyclone filtrate returns desulphurization denitration tower, the solid content leaving cyclone is the slurries of 40% to 60%, enter vacuum belt dewaterer, through vacuum belt dewaterer dehydration generate moisture content be not more than 10%(wt) gypsum patty will, gypsum patty will sends into gypsum storehouse, and belt filtrate returns desulphurization denitration tower.

Described absorbent is the mixed liquor of ammoniacal liquor and catalyst, and ammoniacal liquor, as desulfurization denitrification agent, absorbs SO2 and NOx in flue gas, produce ammonium sulfite, described catalyst is mixed with absorbent through catalyst pump 8 by catalyst tank 7, and catalyst can solve the situation that NO is insoluble in water, NO can be oxidized to NO 2, to improve NOx oxidizability, improve the denitration efficiency of ammoniacal liquor.

The invention has the beneficial effects as follows:

(1) desulfurization off sulfide effect is remarkable.Synthesis desulfurating efficiency can ensure more than 98%, denitration efficiency more than 80%, and SO 2 from fume concentration of emission is lower than 35mg/Nm 3, discharged nitrous oxides concentration is lower than 50mg/Nm 3.

(2) the whole closed cycle of desulphurization denitration water, non-secondary pollution.

(3) ammonia-soda process desulphurization denitration, ammoniacal liquor is just as absorbent, ammonium sulfate after absorption is replaced by quick lime, ammoniacal liquor can recycle, ammonia volume is little, solve that the simple acquisition cost adopting ammonia process of desulfurization denitration to there is ammoniacal liquor is high and cost of transportation is high, transport and there is the problems such as explosion danger.

(4) in flue gas desulfurization and denitrification tower, utilize the reverse spray process of multiple tracks, sprayed into by absorbing liquid in flue gas, under the drive of high velocity air, absorbing liquid is blown to vaporific, and specific area is large, makes gas-liquid contact more abundant.Thus ensure that the stable of denitrification efficiency.

(5) system can ensure that long-term normal table runs, and maintenance is very little.Desulphurization denitration tower not containing the parts easily causing fouling, and adopts ammoniacal liquor as absorbing liquid, effectively prevent the blocking of nozzle, there is not the problem such as fouling and blocking.The normal operation of overhaul of the equipments not influential system, system normal operation rate more than 98%.

(6) operating cost is low.In traditional desulphurization denitration operating cost, desulfurization denitrification agent expense accounts for larger proportion, and native system uses ammonium sulfate do ammonia source and recycle, and does not consume in theory, and what in fact consume is ammonia and the catalyst of lime and minute quantity, so operating cost is lower.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the present invention is further illustrated.

Accompanying drawing 1 is the flow chart of a kind of ammonia-soda process combined desulfurization and denitrification process of the present invention.

In figure, 1, quick lime storehouse, 2, belt weigher, 3, pulping tank, 4, slurry feeding pump, 5, regenerating tank, 6, slush pump, 7 catalyst tank, 8, catalyst transport pump, 9, slurry circulating pump, 10, technique water pump, 11, desulphurization denitration tower, 12, baffle door, 13, chimney, 14, seal fan, 15, baffle door, 16, air blast, 17, sack cleaner, 18, oxidation fan, 19, agitator, 20, aqua ammonia pump, 21, tank used for storing ammonia, 22, cyclone, 23, vacuum belt dewaterer, 24, gypsum storehouse, 25, clarified solution delivery pump, 26, clear water reserviors, 27, depositing reservoir, 28, gypsum pump, 29, absorbent pump, 30, demister, 31, spraying layer, 32, slurry pool, A, clarified solution, B, trench slurries, C, desulphurization denitration tower slurries, D, belt filtrate, E, pulping process water, F, demist fresh water (FW), G, former flue gas, H, cyclone filtrate.。

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated, but be not used for limiting the scope of the invention.

The present invention adopts SO2 and NOx in circulation ammonia-soda process absorption flue gas, namely use ammonia as desulfurization denitrification agent, quick lime is as displacer, in desulphurization denitration tower 11, ammonia absorbs SO2 and NOx in flue gas, produce ammonium sulfite, then with the oxygen generation oxidation reaction passed into, ammonium sulfite is oxidized to ammonium sulfate, ammonium sulfate and ammonium sulfite use lime white (Main Ingredients and Appearance is Ca (OH) 2) to carry out regeneration displacement again, then the NH born 3.H 2o returns in desulphurization denitration tower 11 and participates in desulphurization denitration, and constantly circulate according to this, ammonia does not consume in theory, but should consider the loss of the ammonia that water evaporates and outer lithoexpulsium paste are taken away in practice.

Ammonia-soda process combined desulfurization and denitrification process and device adopt absorption process to carry out purifying smoke, and it contains physics and chemistry two processes.The process that flue gas enters liquid phase circulation slurries from gas phase in desulphurization denitration tower 11 is physical process, and this process can be explained by boundary-layer theory.Reaction between flue gas and absorbent is chemical process.Be divided into following several stage: SO 2and NOx is from gas phase internal migration to boundary → SO 2and NOx enters liquid phase → react with the absorbent liquid phase from gas phase from boundary.

The chemical reaction of ammonia in desulphurization denitration is as follows:

(1) absorption reaction

(2) preparation and regenerative response

The NH that regeneration obtains 3.H 2o clear liquid is sent desulphurization denitration tower back to and is recycled;

(3) oxidizing process

As shown in Figure 1, the device of a kind of ammonia-soda process combined desulfurization and denitration of the present invention, comprise flue gas input system, smoke absorption system and purifying smoke output system, also comprise antigravity system, serum producing system, exchange system and Product Collection System, described flue gas input system comprises the sack cleaner 17, flue air blast 16 and the baffle door I 15 that connect successively; Former flue gas G, through sack cleaner 17 Chalk-dust filtering, then carries out supercharging through flue air blast 16, and the flue gas after supercharging sends into desulphurization denitration tower 11 by baffle door I 15; Described smoke absorption system is made up of desulphurization denitration tower 11, described baffle door I 15 is connected with the air inlet of desulphurization denitration tower 11, described purifying smoke output system is made up of baffle door II 12 and chimney 13, described baffle door II 12 is connected with the gas outlet of desulphurization denitration tower 11, neat stress after desulphurization denitration enters air by baffle door II 12 and chimney 13, and seal fan 14 is for sealing baffle door II 12 and baffle door I 15; Described antigravity system comprises catalyst tank 7 and catalyst transport pump 8, described serum producing system comprises the quick lime storehouse 1, belt weigher 2, the pulping tank 3 that connect successively and forms, described exchange system comprises the delivery pump 4, regenerating tank 5 and the gypsum pump 28 that connect successively, described pulping tank 3 is connected with delivery pump 4, described Product Collection System comprise connect successively cyclone 22, vacuum filtering and dewatering machine 23, gypsum storehouse 24.

Set gradually three grades of spraying layers 31 and two-stage demister 30 above described desulphurization denitration tower 11, described spraying layer, by distributing pipe network and nozzle forms, adopts glass steel material; Demister 30 is arranged on the top of spraying layer, is connected with technique water pump 10, and demist fresh water (FW) F sends into demister 30 through technique water pump 10, and carry out to flue gas the droplet that demist carries secretly in order to be separated neat stress, demister 30 exiting flue gas droplet concentration is not more than 75mg/Nm 3(butt), ensures under 100% flue gas load, and the pressure drop of whole two-stage demister is lower than 120Pa; Be provided with slurry pool 32 and agitator 19 below desulphurization denitration tower 11, agitator 19 ensures to mix, and prevents slurries from precipitating; Described slurry pool 32 is connected with spraying layer 31 by slurry circulating pump 9, and the ammoniacal liquor in slurry pool 32 is delivered to spraying layer 31, and described slurry pool 32 is also connected with oxidation fan 18, by HSO unoxidized in the slurries of slurry pool 32 3-and SO 3 2-be oxidized to SO 4 2-.

Described slurry pool 32 is connected with tank used for storing ammonia 21 by aqua ammonia pump 20, a small amount of ammonia taken away toward supplementing water steam in desulphurization denitration tower 11 and gypsum by aqua ammonia pump 20.

Described catalyst transport pump 8 is connected with slurry pool 32, and the catalyst be contained in catalyst tank 7 sends into slurry pool 32 by catalyst transport pump 8, and described catalyst is the situation being insoluble in water in order to solve NO, and object is that NO is oxidized to NO 2, to improve NOx oxidizability, improve the denitration efficiency of ammoniacal liquor.

Described regenerating tank 5 is connected with cyclone 22 by gypsum pump 28, the gypsum slurries that regenerative response generates carries out preliminary hydro-extraction, gained cyclone filtrate returns desulphurization denitration tower 11, described regenerating tank 5 is connected with bottom desulphurization denitration tower 11 by slush pump 6, saturated slurries bottom desulphurization denitration tower 11 are delivered in regenerating tank 5 by slush pump 6, react with the lime stone slurry in regenerating tank 5, regenerate absorbing liquid, the ammoniacal liquor after regeneration is sent into slurry circulating pump 9 by absorbent pump 29 and is again recycled; The gypsum slurries that regenerative response generates is sent into cyclone 22 by gypsum pump 28 and is carried out preliminary hydro-extraction, cyclone filtrate F returns absorption tower system, the solid content leaving cyclone 22 is 40% to 60%, enter vacuum belt dewaterer 23, through vacuum belt dewaterer 23 dewater generate moisture content be not more than 10%(wt) gypsum patty will, gypsum patty will sends into gypsum storehouse 24, and belt filtrate D returns desulphurization denitration tower 11.

Described desulphurization denitration tower 11 is connected with accident slurry pool, described accident slurry pool is divided into depositing reservoir 27 and clear water reserviors 26 two parts, depositing reservoir is connected 32 and connects with slurry pool, clear water reserviors 26 are connected with desulphurization denitration tower 11 by clarified water pump 25, and when desulphurization denitration tower 11 breaks down, denitration Desulfurization tower slurry C enters depositing reservoir 27, clarified solution after clarification enters clear water reserviors 27, clear water reserviors 27 arrange agitator, prevent gypsum deposition, and clarified solution A returns desulphurization denitration tower 11 by clarified water pump 25.

Utilize said apparatus to carry out desulphurization denitration, adopt SO2 and NOx in circulation ammonia-soda process absorption flue gas, it is characterized in that: specifically comprise the steps:

(1) supercharging is filtered: former flue gas enters sack cleaner 17 Chalk-dust filtering through input flue, then carries out supercharging through flue air blast 16, and the flue gas after supercharging sends into desulphurization denitration tower 11 by baffle door I 15;

(2) desulphurization denitration: the catalyst that the ammoniacal liquor in slurries district 32 and catalyst pump 8 are carried is squeezed into spraying layer 31 by slurry circulating pump 9, shower ejection absorbent is by the SO in flue gas 2and removal of nitrogen oxide;

(3) demist: demist fresh water (FW) F enters demister 30 by technique water pump 10, will carry out demist by gained flue gas after desulphurization denitration process;

(4) neat stress exports: the neat stress after demist enters air by baffle door II 12 and chimney 13 successively;

(5) preparation of ammoniacal liquor and regeneration: the ammonium sulfate generated after step (2) flue gas desulfurization and denitrification and ammonium sulfite are sent in regenerating tank 5 by slush pump 6, to react generation ammoniacal liquor with the lime stone slurry in regenerating tank 5, the ammoniacal liquor of generation is sent into slurry circulating pump 9 by absorbent pump 29 and is again recycled;

(6) Product recycling: the gypsum slurries generated in step (5) reaction is sent into cyclone 22 by gypsum pump 28 and carried out preliminary hydro-extraction, cyclone filtrate F returns desulphurization denitration tower 11, the solid content leaving cyclone 22 is the slurries of 40% to 60%, enter vacuum belt dewaterer 23, through vacuum belt dewaterer 23 dewater generate moisture content be not more than 10%(wt) gypsum patty will, gypsum patty will sends into gypsum storehouse 24, and belt filtrate D returns desulphurization denitration tower 11.

When desulphurization denitration tower 11 breaks down, denitration Desulfurization tower slurry C enters depositing reservoir 27, and the clarified solution after clarification enters clear water reserviors 27, and clear water reserviors 27 arrange agitator, prevent gypsum deposition, and clarified solution A returns desulphurization denitration tower by clarified water pump 25.

Application the present invention carries out gas cleaning, and desulfuration efficiency reaches 98%, and denitration efficiency reaches more than 80%.

Claims (9)

1. the device of an ammonia-soda process combined desulfurization and denitration, comprise flue gas input system, smoke absorption system and purifying smoke output system, it is characterized in that: also comprise antigravity system, serum producing system, exchange system and Product Collection System, described flue gas input system comprises the sack cleaner (17), flue air blast (16) and the baffle door I (15) that connect successively, described smoke absorption system is made up of desulphurization denitration tower (11), described baffle door I (15) is connected with the air inlet of desulphurization denitration tower (11), described purifying smoke output system is made up of baffle door II (12) and chimney (13), described baffle door II (12) is connected with the gas outlet of desulphurization denitration tower (11), described antigravity system comprises catalyst tank (7) and catalyst transport pump (8), described serum producing system comprises the quick lime storehouse (1) connected successively, belt weigher (2), pulping tank (3) forms, described exchange system comprises the delivery pump (4) connected successively, regenerating tank (5) and gypsum pump (28), described pulping tank (3) is connected with delivery pump (4), described Product Collection System comprises the cyclone (22) connected successively, vacuum filtering and dewatering machine (23), gypsum storehouse (24).
2. the device of a kind of ammonia-soda process combined desulfurization and denitration according to claim 1, it is characterized in that: described desulphurization denitration tower (11) top sets gradually three grades of spraying layers and two-stage demister (30), described spraying layer, by distributing pipe network and nozzle forms, adopts glass steel material; Demister (30) is arranged on the top of spraying layer, be connected with technique water pump (10), desulphurization denitration tower (11) below is provided with slurry pool (32) and agitator (19), described slurry pool (32) is connected with spraying layer by slurry circulating pump (9), and described slurry pool (32) is also connected with oxidation fan (18).
3. the device of a kind of ammonia-soda process combined desulfurization and denitration according to claim 1, is characterized in that: described baffle door I (15) and baffle door II (12) are controlled to open by seal fan (14).
4. the device of a kind of ammonia-soda process combined desulfurization and denitration according to claim 1, is characterized in that: described slurry pool (32) is connected with tank used for storing ammonia (21) by aqua ammonia pump (20).
5. the device of a kind of ammonia-soda process combined desulfurization and denitration according to claim 1, is characterized in that: described catalyst transport pump (8) is connected with slurry pool (32).
6. the device of a kind of ammonia-soda process combined desulfurization and denitration according to claim 1, it is characterized in that: described regenerating tank (5) is connected with cyclone (22) by gypsum pump (28), be connected with desulphurization denitration tower (11) bottom by slush pump (6), be connected with slurry circulating pump (9) by absorbent pump (29).
7. the device of a kind of ammonia-soda process combined desulfurization and denitration according to claim 1, it is characterized in that: described desulphurization denitration tower (11) is connected with accident slurry pool, described accident slurry pool is divided into depositing reservoir (27) and clear water reserviors (26) two parts, depositing reservoir is connected with slurry pool (32) connects, and clear water reserviors (26) are connected with desulphurization denitration tower (11) by clarified water pump (25).
8. a technique for ammonia-soda process combined desulfurization and denitration, is characterized in that: specifically comprise the steps:
(1) supercharging is filtered: former flue gas enters sack cleaner (17) Chalk-dust filtering through input flue, then carry out supercharging through flue air blast (16), the flue gas after supercharging sends into desulphurization denitration tower (11) by baffle door I (15);
(2) desulphurization denitration: the catalyst that the ammoniacal liquor of slurries district (32) and catalyst pump (8) are carried is squeezed into spraying layer (31) by slurry circulating pump (9), shower ejection absorbent is by the SO in flue gas 2and removal of nitrogen oxide;
(3) demist: demist fresh water (FW) (F) enters demister (30) by technique water pump (10), will carry out demist by gained flue gas after desulphurization denitration process;
(4) neat stress exports: the neat stress after demist enters air by baffle door II (12) and chimney (13) successively;
(5) preparation of ammoniacal liquor and regeneration: the ammonium sulfate generated after step (2) flue gas desulfurization and denitrification and ammonium sulfite are sent in regenerating tank (5) by slush pump (6), to react generation ammoniacal liquor with the lime stone slurry in regenerating tank (5), the ammoniacal liquor of generation is sent into slurry circulating pump (9) by absorbent pump (29) and is again recycled;
(6) Product recycling: the gypsum slurries generated in step (5) reaction is sent into cyclone (22) by gypsum pump (28) and carried out preliminary hydro-extraction, cyclone filtrate (F) returns desulphurization denitration tower (11), the solid content leaving cyclone (22) is the slurries of 40% to 60%, enter vacuum belt dewaterer (23), through vacuum belt dewaterer (23) dehydration generate moisture content be not more than 10%(wt) gypsum patty will, gypsum patty will sends into gypsum storehouse (24), and belt filtrate (D) returns desulphurization denitration tower.
9. the technique of a kind of ammonia-soda process combined desulfurization and denitration according to claim 8, is characterized in that: described absorbent is the mixed liquor of ammoniacal liquor and catalyst.
CN201510199847.1A 2015-04-25 2015-04-25 Device and process of ammonia-soda-process combined desulfurization and denitrification CN105032173A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510199847.1A CN105032173A (en) 2015-04-25 2015-04-25 Device and process of ammonia-soda-process combined desulfurization and denitrification

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510199847.1A CN105032173A (en) 2015-04-25 2015-04-25 Device and process of ammonia-soda-process combined desulfurization and denitrification

Publications (1)

Publication Number Publication Date
CN105032173A true CN105032173A (en) 2015-11-11

Family

ID=54439498

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510199847.1A CN105032173A (en) 2015-04-25 2015-04-25 Device and process of ammonia-soda-process combined desulfurization and denitrification

Country Status (1)

Country Link
CN (1) CN105032173A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106178896A (en) * 2016-08-26 2016-12-07 江苏中圣高科技产业有限公司 The desulfurizer of a kind of ammonia circulation utilization and method
CN107398165A (en) * 2017-08-10 2017-11-28 上海博丹环境工程技术股份有限公司 A kind of desulfurizing and denitrifying process of boiler smoke
CN107744715A (en) * 2017-10-27 2018-03-02 南京理工大学 A kind of flue gas treating process of liquid phase simultaneous SO_2 and NO removal

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1544126A (en) * 2003-11-11 2004-11-10 华东理工大学 Method for removing and reclaiming NO and SO2 in waste gas using ammonia solution
CN101091875A (en) * 2007-04-24 2007-12-26 颜松林 Method for recovering ammonia from by-product of ammonia process of desulfurization for boiler flue gas
CN101934191A (en) * 2010-09-06 2011-01-05 江苏新世纪江南环保有限公司 Method for desulfurizing and denitrating smoke simultaneously through ammonia method
CN102350190A (en) * 2011-06-29 2012-02-15 北京国电清新环保技术股份有限公司 Integrated purification process for desulfurized and denitrified fume and device
EP2552573A1 (en) * 2010-03-30 2013-02-06 University of Regina Catalytic method and apparatus for separating a gaseous component from an incoming gas stream
CN103977686A (en) * 2014-05-15 2014-08-13 淮南市明月环保科技有限责任公司 Ammonia desulfurization and denitration type flue gas purification system
CN204502800U (en) * 2015-04-25 2015-07-29 张少篪 A kind of ammonia-soda process combined desulfurization and denitration device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1544126A (en) * 2003-11-11 2004-11-10 华东理工大学 Method for removing and reclaiming NO and SO2 in waste gas using ammonia solution
CN101091875A (en) * 2007-04-24 2007-12-26 颜松林 Method for recovering ammonia from by-product of ammonia process of desulfurization for boiler flue gas
EP2552573A1 (en) * 2010-03-30 2013-02-06 University of Regina Catalytic method and apparatus for separating a gaseous component from an incoming gas stream
CN101934191A (en) * 2010-09-06 2011-01-05 江苏新世纪江南环保有限公司 Method for desulfurizing and denitrating smoke simultaneously through ammonia method
CN102350190A (en) * 2011-06-29 2012-02-15 北京国电清新环保技术股份有限公司 Integrated purification process for desulfurized and denitrified fume and device
CN103977686A (en) * 2014-05-15 2014-08-13 淮南市明月环保科技有限责任公司 Ammonia desulfurization and denitration type flue gas purification system
CN204502800U (en) * 2015-04-25 2015-07-29 张少篪 A kind of ammonia-soda process combined desulfurization and denitration device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106178896A (en) * 2016-08-26 2016-12-07 江苏中圣高科技产业有限公司 The desulfurizer of a kind of ammonia circulation utilization and method
CN107398165A (en) * 2017-08-10 2017-11-28 上海博丹环境工程技术股份有限公司 A kind of desulfurizing and denitrifying process of boiler smoke
CN107744715A (en) * 2017-10-27 2018-03-02 南京理工大学 A kind of flue gas treating process of liquid phase simultaneous SO_2 and NO removal

Similar Documents

Publication Publication Date Title
CN102974185B (en) Modularized integrated smoke purification system and method for removing plurality of pollutants
CN103301749B (en) The method of flue gas and desulfurizing and denitrifying
CN101579602B (en) Energy-saving and high-quality ammonia desulphurization process for ammonia sulfate recovery
CN100496675C (en) Simultaneous desulfurization and denitration wet ammonia flue gas cleaning technology and system thereof
WO2016192272A1 (en) Integrated flue gas treatment device and method
CN200998639Y (en) Concentrated crystallization and absorbed oxidation combined type ammonia process desulfuration tower
CN101254394B (en) Sintering device flue gas multiple pollutant removing process and system thereof
CN102381687B (en) Method for preparing acid by using sulfur containing waste material and wet method desulphurization process containing method thereof
CN101934192B (en) Double-tower ammonia-method desulfurization process
CN203507793U (en) Device for simultaneously removing sulfur dioxide and nitrogen oxide from coke oven flue gas
CN102716648B (en) Method for automatically controlling desulphurization and denitration by flue gas based on pH value and ORP value and apparatus thereof
RU2459655C2 (en) Device and method of smoke fumes
CN101422691B (en) Multi-pollutant removing technique and device of fuel coal smoke
CN100496676C (en) Wet ammonia flue gas cleaning technology simultaneously removing various pollutant and system thereof
CN103301732B (en) Device and process for recycling and treating hydrogen sulfide-containing chemical acid waste gas
CN104941423B (en) A kind of regeneration fume from catalytic cracking ammonia process of desulfurization denitration dust collecting method and device
CN102755823B (en) Method for desulfurizing high-sulphur boiler flue gas to prepare high-purity ammonium bisulfite
CN103303877B (en) Many sources of the gas low concentration SO 2smoke comprehensive reclaims acid-making process flow process
CN103239982B (en) Method for dedusting and desulfurizing catalytic-cracking oil refining regenerated flue gas
CN102512927B (en) Integrated flue gas desulfurizing and denitrating purification system and purification technology for same
CN103816780B (en) A kind of low-temperature flue gas desulphurization denitration is except ammonia integral process
CN101157003B (en) Wet-type ammonia flue gas purification technics for associated desulfuration demercuration and system
CA2908788A1 (en) Method for effectively removing acidic sulfide gas using ammonia-based desulfurization
CN101745305A (en) Method for removing various gaseous pollutants from smoke gas
CN102350214A (en) Coal-fired power plant coal dust prepared activated coke flue gas comprehensive purification system and technology

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20151111

RJ01 Rejection of invention patent application after publication