CN105903332B - Semi-dry method desulfurization and denitrification integrated process and device in synergism with charged oxidation - Google Patents

Semi-dry method desulfurization and denitrification integrated process and device in synergism with charged oxidation Download PDF

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Publication number
CN105903332B
CN105903332B CN201610463224.5A CN201610463224A CN105903332B CN 105903332 B CN105903332 B CN 105903332B CN 201610463224 A CN201610463224 A CN 201610463224A CN 105903332 B CN105903332 B CN 105903332B
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absorbent
absorption tower
flue gas
charged
atomizer
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CN201610463224.5A
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CN105903332A (en
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崔琳
张立强
董勇
马春元
李玉忠
王鹏
王志强
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山东大学
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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
    • B01D53/75Multi-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
    • B01D53/46Removing components of defined structure
    • B01D53/60Simultaneously removing sulfur oxides and nitrogen 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
    • B01D53/76Gas phase processes, e.g. by using aerosols
    • 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
    • B01D53/77Liquid phase processes
    • B01D53/79Injecting reactants
    • 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
    • B01D53/80Semi-solid phase processes, i.e. by using slurries
    • 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
    • B01D53/81Solid phase processes
    • B01D53/83Solid phase processes with moving reactants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/10Oxidants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/10Oxidants
    • B01D2251/104Ozone
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/10Oxidants
    • B01D2251/108Halogens or halogen compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/30Alkali metal compounds
    • B01D2251/304Alkali metal compounds of sodium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/40Alkaline earth metal or magnesium compounds
    • B01D2251/402Alkaline earth metal or magnesium compounds of magnesium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/40Alkaline earth metal or magnesium compounds
    • B01D2251/404Alkaline earth metal or magnesium compounds of calcium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2259/00Type of treatment
    • B01D2259/80Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/818Employing electrical discharges or the generation of a plasma
    • 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

The invention a semi-dry method desulfurization and denitrification integrated process and device in synergism with charged oxidation. The device comprises an absorption tower. A gradually-expanding section with the diameter gradually increased from bottom to top is arranged at the bottom of the absorption tower, a smoke inlet pipe is arranged at the bottom of the gradually-expanding section, an absorbent feeding port is formed in the wall of the gradually-expanding section and connected with an absorbent bin through a first screw feeder, multiple layers of atomizing nozzles are arranged at the lower middle part in the absorption tower, and a smoke outlet is formed in the top of the absorption tower. Openings of the atomizing nozzles are all formed upwards, the atomizing nozzles are all connected with a water tank through a water pump and further connected with an atomized compressed air pipeline, corona-charged rings are arranged above the atomizing nozzles respectively and supplied with power through a high-voltage power supply, and an oxidizing agent outlet pipeline is connected with the water tank or the atomized compressed air pipeline or the absorption tower.

Description

A kind of semi-dry desulfurization and denitrification integral process and device of charged oxidation collaboration
Technical field
The invention belongs to a kind of gas pollution control technology, and in particular to a kind of to be aoxidized with strong oxidizer by water fog charge Cooperative achievement semi-dry process flue gas desulphurization denitrification integral process and device.
Background technology
China is coal-fired big country, for a long time coal in the ratio of Chinese primary energy production and consumption structure all 70% Left and right.A large amount of consumption of coal cause SO2、NOxA large amount of discharges, serious environment pollution brought to the economy of China huge Loss.Control SO2、NOxIt is that coal-fired flue-gas are carried out with desulphurization denitration to pollute maximally effective technological means, and current desulphurization and denitration is usual Using two covering devices, invest big system complex and operating cost is high, therefore, desulfurization and denitrification integral technology becomes future development Direction.
In desulfurization technology, wet process of FGD efficiency >=95%, but, wet method fume desulfurizing system is complex, and Wet process of FGD product is liquid, needs product processing device to carry out processed to liquid product, causes at the beginning of wet desulphurization The problems such as phase investment cost is high, floor space is big.Semi-dry process flue gas desulphurization simple system, and desulfurization product is solid-state, without the need for right Product carries out processed, so semi-dry process flue gas desulphurization initial investment expense is low, floor space is little, is more suitable for China numerous Medium and small unit is newly-built or transforms the restricted truth of fund and place existed during sulfur removal technology, obtains relatively rapider at home Development.However, the flue gas desulfurization of conventional semi method is due to belonging to gas-liquid-solid phase reaction desulfurization, passed by collision probability, gas-liquid-solid Matter etc. affects, and semi-dry desulphurization efficiency highest only has 90% or so, it is impossible to meets increasingly strict environmental requirement and is particularly flue gas The requirement of ultra-clean discharge, and the sorbent utilization of conventional semi method flue gas desulfurization technique is not high, not only causes desulfurizing agent Serious waste, and operating cost is increased, if the desulfuration efficiency and desulfurizing agent profit of semi-dry method flue gas desulfurization technique can be improved With rate and while realize denitration, then the low, non-wastewater discharge of simple system, investment cost of semidry process etc. can be given full play to excellent Point, with obvious technical advantage and competitiveness.
The content of the invention
To overcome the defect of prior art, the invention provides a kind of semi-dry desulfurization and denitrification one of charged oxidation collaboration Chemical industry skill and device, improve the utilization rate of semidry method absorbent on the whole with desulfuration efficiency and realize semi-dry desulfurization and denitrification one Change operation.
For achieving the above object, the technical scheme is that:
A kind of semi-dry desulfurization and denitrification integral device of charged oxidation collaboration, including absorption tower, the bottom on the absorption tower Portion is provided with the divergent segment that diameter gradually increases from the bottom to top, and the divergent segment bottom is provided with flue gas inlet tube, the divergent segment Wall is provided with absorbent charging aperture, and the absorbent charging aperture connects absorbent storehouse, the absorption by the first screw(-type) feeder Middle and lower part in tower is provided with multilamellar atomizer, is provided with exhanst gas outlet at the top of the absorption tower;Wherein, the multilamellar atomization spray The spout of mouth sets up, and the multilamellar atomizer is connected with water tank by water pump, and the multilamellar atomizer is equal Connection atomization compressed air piping, is provided with corona charging ring above the spout of every layer of atomizer, the corona charging ring passes through High voltage power supply is powered, and oxidant outlet pipeline is connected with water tank, or oxidant outlet pipeline is connected with atomization compressed air piping, Or oxidant outlet pipeline is connected with absorption tower.
Corona charging ring is provided with above the atomizer of the present invention, is strengthened the charged rear electrostatic force of atomized drop, is effectively dropped Low fogging size droplet diameter improves droplet particles quantity and improves Spray Uniformity, realizes the efficient humidification activation of absorbent, promotes Desulphurization reaction is rapidly and efficiently carried out, and improves desulfuration efficiency;The present invention increased oxidant outlet pipeline, oxidant is entered Enter in absorption tower, by SO2SO is oxidized into NO3With NO2, and with absorbed by absorbent, so as to reach the mesh of desulphurization denitration 's;The present invention is provided with multilamellar atomizer, realizes the purpose of multi-lever electric and multi-stage oxidizing, so as to further improve desulfurization The efficiency of denitration is the utilization rate of absorbent;The present invention uses corona charging ring, using corona discharge (ionized gas) mode lotus Electricity, can adopt higher charged voltage, realize higher carrying capacity, be more beneficial for droplet dispersion and promote droplet and absorbent Grain crash response, improves absorption efficiency.
Preferably, the import connection air compressor of the atomization compressed air piping.
It is further preferred that the atomizer is air atomizer spray nozzle.
Preferably, the import connection high-pressure pump of the oxidant outlet pipeline.
Preferably, the oxidant outlet pipeline is connected as with absorption tower, the oxidant outlet pipeline and the flue gas Inlet tube connects, while connecting at the oxidant outlet pipeline and the absorption tower between the divergent segment and atomizer.
Preferably, the exhanst gas outlet connects separator.
It is further preferred that the solid matter outlet of the separator is connected with absorption tower by the second screw(-type) feeder. The absorbent not utilized can be recycled, so as to improve the utilization ratio of absorbent.
A kind of technique of utilization said apparatus desulphurization denitration, oxidant is passed through to water tank Jing water pumps conveying after being mixed with water Atomization is carried out to atomizer and forms atomized drop, after high voltage power supply is powered to corona charging ring, made through corona charging ring Atomized drop is charged;Absorbent is weighed Jing the first screw(-type) feeder and is mixed with flue gas after absorbent charging aperture enters absorption tower After uniform, rise in absorption tower with flue gas, the charged aerosolized liquid droplets being collectively forming with multilamellar atomizer and corona charging ring Multistage mixing is carried out, absorbent is carried out efficient humidification activation by charged aerosolized liquid droplets, make absorbent remove the major part in flue gas SO2, oxidant is by remaining fraction SO2It is multistage with NO to be oxidized to SO respectively3With NO2Afterwards, then in charged aerosolized liquid droplets and suction Receive SO is removed under agent synergy3With NO2, the flue gas after desulphurization denitration goes out from absorption tower top row.
A kind of technique of utilization said apparatus desulphurization denitration, gaseous oxidizer is passed through to atomization compressed air piping and mist Atomizer is delivered to jointly with water after changing compressed air mixing and carry out atomization and form atomized drop, high voltage power supply gives corona charging ring After power supply, make the atomized drop through corona charging ring charged;The first screw(-type) feeders of absorbent Jing weigh to enter by absorbent After material mouth is mixed homogeneously with flue gas after entering absorption tower, rise in absorption tower with flue gas, with multilamellar atomizer and corona lotus The charged aerosolized liquid droplets that electric ring is collectively forming carry out multistage mixing, and absorbent is carried out efficient humidification activation by charged aerosolized liquid droplets, Absorbent is made to remove the most of SO in flue gas2, oxidant is by remaining fraction SO2It is multistage with NO to be oxidized to SO respectively3With NO2Afterwards, then SO is removed under charged aerosolized liquid droplets with absorbent synergy3With NO2, the flue gas after desulphurization denitration is from absorption Tower top is discharged.
A kind of technique of utilization said apparatus desulphurization denitration, high-pressure pump are directly delivered to gaseous oxidizer in absorption tower Different parts, the water in water tank is delivered to atomizer by water pump to carry out atomization and forms atomized drop, and high voltage power supply gives corona lotus After electric ring is powered, make the atomized drop through corona charging ring charged;The first screw(-type) feeders of absorbent Jing are weighed by absorbing After agent charging aperture is mixed homogeneously with flue gas after entering absorption tower, rise in absorption tower with flue gas, with multilamellar atomizer and electricity The charged aerosolized liquid droplets that charged ring of swooning is collectively forming carry out multistage mixing, and absorbent is carried out efficiently humidification and lived by charged aerosolized liquid droplets Change, make absorbent remove the most of SO in flue gas2, oxidant is by remaining fraction SO2It is multistage with NO to be oxidized to SO respectively3 With NO2Afterwards, then SO is removed under charged aerosolized liquid droplets with absorbent synergy3With NO2, the flue gas after desulphurization denitration is from suction Receive tower top to discharge.
Present invention process directly adds oxidant in semi-dry desulfurizing process, can carry out desulphurization denitration simultaneously, realizes The integration of desulphurization denitration;Present invention process is charged to atomized drop using corona charging ring, not only increases semidry method and takes off Sulphur efficiency, and promote the NO of absorbent pair2Absorb, so as to improve denitration efficiency.
Preferably, the absorbent is calcium-base absorbing agent, sodio absorbent or magnesio absorbent.
Preferably, the position that high-pressure pump is directly delivered to gaseous oxidizer in absorption tower have flue gas inlet tube and with gradually At the absorption tower expanded between section and atomizer.
Preferably, the flue gas for going out from absorption tower top row is discharged from the top of separator through the flue gas after separator, separation, point Solid material after enters the divergent segment on absorption tower from second screw(-type) feeder of bottom of separator, so as to realize absorbent Make full use of.
Preferably, the oxidant can adopt phase oxidative agent such as KMnO4Deng, Oxygen in Liquid agent such as NaClO3Solution etc., gas Phase oxidation agent such as O3、ClO2Deng.
The invention has the beneficial effects as follows:
The present invention can effectively reduce drop after electrostatic force enhancing and droplets using after atomized drop corona charging Particle diameter improves droplet particles quantity and improves Spray Uniformity, improves the collision probability of atomized drop and absorbent, realizes inhaling The efficient humidification activation of agent is received, promotes desulphurization reaction rapidly and efficiently to carry out, major part SO in removing flue gas2, while utilizing strong oxygen Agent is to fraction SO2And whole NO carries out classification and is oxidized to SO3With NO2Absorbed using semidry process afterwards, carried on the whole The utilization rate of high semidry method absorbent is with desulfuration efficiency and realizes that semi-dry desulfurization and denitrification integral runs.
Description of the drawings
Structural representations of the Fig. 1 for embodiment 1;
Structural representations of the Fig. 2 for embodiment 2;
Structural representations of the Fig. 3 for embodiment 3;
Structural representations of the Fig. 4 for corona charging ring;
Wherein, 1. Oxygen in Liquid agent delivery pump, 2. technique water tank, 3. technique water pump, 4. air compressor, 5. absorbent Storehouse, 6. high voltage power supply, 7. atomizer, 8. corona charging ring, 9. absorption tower, 10. separator, 11. second screw(-type) feeders, 12. high-pressure pumps.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the invention will be further described.
Embodiment 1
A kind of semi-dry desulfurization and denitrification integral device of charged oxidation collaboration, as shown in figure 1, including absorption tower 9, absorbing The bottom of tower 9 is provided with the divergent segment that diameter gradually increases from the bottom to top, and divergent segment bottom is provided with flue gas inlet tube, the wall of divergent segment Be provided with absorbent charging aperture, absorbent charging aperture connects absorbent storehouse 5 by the first screw(-type) feeder, in absorption tower under Portion is provided with multilamellar atomizer 7, and exhanst gas outlet is provided with the top of absorption tower;Wherein, the spout of multilamellar atomizer 7 is set upwards Put, multilamellar atomizer 7 is connected with technique water tank 2 by technique water pump 3, it is empty that multilamellar atomizer 7 is all connected with atomization compression Feed channel, is provided with corona charging ring 8 above the spout of every layer of atomizer 7, its structure is as shown in figure 4, corona charging ring 8 passes through High voltage power supply 6 is powered, and oxidant outlet pipeline is connected with technique water tank 2.
The import connection air compressor 4 of atomization compressed air piping;Atomizer 7 is air atomizer spray nozzle.
Exhanst gas outlet connects separator 10.The solid matter outlet of separator 10 is by the second screw(-type) feeder 11 and absorption Tower 9 connects.
Its technique is:
Oxidant is passed through to technique water tank 2 (during using Oxygen in Liquid agent, Oxygen in Liquid agent is conveyed by Oxygen in Liquid agent Pump 1 is delivered to technique water tank 2, and using during phase oxidative agent, phase oxidative agent is directly added into technique water tank and 2) is mixed with fresh water (FW) Atomizer 7 is delivered to by technique water pump 3 carries out atomization and form atomized drop, high voltage power supply 6 is powered to corona charging ring 8 Afterwards, make the atomized drop through corona charging ring 8 charged;The first screw(-type) feeders of absorbent Jing from absorbent storehouse 5 are weighed After mixing homogeneously with flue gas after absorption tower 9 is entered by absorbent charging aperture, rise in absorption tower with flue gas, be atomized with multilamellar The charged aerosolized liquid droplets that nozzle 7 and corona charging ring 8 are collectively forming carry out multistage mixing, and absorbent is carried out by charged aerosolized liquid droplets Efficiently humidification activation, makes absorbent remove the most of SO in flue gas2, oxidant is by remaining fraction SO2With the multistage difference of NO It is oxidized to SO3With NO2Afterwards, then SO is removed under charged aerosolized liquid droplets with absorbent synergy3With NO2, after desulphurization denitration Flue gas goes out from 9 top row of absorption tower., through separator 10, the flue gas after separation is from separator 10 for the flue gas gone out from 9 top row of absorption tower Top is discharged, and the solid material after separation enters the flaring on absorption tower 9 from second screw(-type) feeder of bottom 11 of separator 10 Section, so as to realize making full use of for absorbent.
Phase oxidative agent is KMnO4, Oxygen in Liquid agent is NaClO3Solution.
Absorbent is calcium oxide or calcium hydroxide, or is sodio absorbent, or is magnesio absorbent.
Principle is:After flue gas enters absorption tower, mixed with the new absorbent sent into and the material for separating loopback, together When flue gas in most of NO and fraction SO2Agent is oxidized step by step is oxidized to NO2、SO3, the SO in flue gas afterwards2、NO2、SO3 The droplet charged through charged ring produced with atomizer is contacted and carries out absorbing reaction.Due to the charged rear electrostatic force of atomized drop Size droplet diameter can effectively be reduced to improve droplet particles quantity and improve Spray Uniformity after enhancing and droplets, therefore carried High collision probability of the atomized drop with absorbent, can realize the efficient humidification activation of absorbent, promote absorbing reaction quick Efficiently carry out, improve the utilization rate and desulfuration efficiency of absorbent on the whole.NO in flue gas is oxidized to soluble in water simultaneously NO2, the integration operation of desulphurization denitration can be synchronously realized in semidry method absorption tower.Flue gas after purification is pre- through separator Follow-up electrostatic precipitation system is entered after separation, from smoke stack emission after dedusting.Using the technique, be capable of achieving desulfuration efficiency 95% with Upper, denitration efficiency more than 80%.
Embodiment 2
A kind of semi-dry desulfurization and denitrification integral device of charged oxidation collaboration, as shown in Fig. 2 including absorption tower 9, absorbing The bottom of tower 9 is provided with the divergent segment that diameter gradually increases from the bottom to top, and divergent segment bottom is provided with flue gas inlet tube, the wall of divergent segment Be provided with absorbent charging aperture, absorbent charging aperture connects absorbent storehouse 5 by the first screw(-type) feeder, in absorption tower under Portion is provided with multilamellar atomizer 7, and the top on absorption tower 9 is provided with exhanst gas outlet;Wherein, the spout of multilamellar atomizer 7 is upwards Arrange, multilamellar atomizer 7 is connected with technique water tank 2 by technique water pump 3, multilamellar atomizer 7 is all connected with atomization compression Air line, is provided with corona charging ring 8 above the spout of every layer of atomizer 7, corona charging ring 8 is powered by high voltage power supply 6, Oxidant outlet pipeline is connected with atomization compressed air piping.
The import connection air compressor 4 of atomization compressed air piping.Atomizer 7 is air atomizer spray nozzle.
The import connection high-pressure pump 12 of oxidant outlet pipeline.
Exhanst gas outlet connects separator 10.The solid matter outlet of separator 10 is by the second screw(-type) feeder 11 and absorption Tower 9 connects.
Its technique is:
By gaseous oxidizer after high-pressure pump 12 is passed through to atomization compressed air piping and is mixed with atomization compressed air Atomizer 7 is delivered to jointly with fresh water (FW) carry out atomization and form atomized drop, after high voltage power supply 6 is to the power supply of corona charging ring 8, make It is charged through the atomized drop of corona charging ring 8;The first screw(-type) feeders of absorbent Jing from absorbent storehouse 5 are weighed by inhaling Receive after mixing homogeneously with flue gas after agent charging aperture enters absorption tower 9, rise in absorption tower with flue gas, with multilamellar atomizer 7 Multistage mixing is carried out with the charged aerosolized liquid droplets that corona charging ring 8 is collectively forming, absorbent is carried out efficiently by charged aerosolized liquid droplets Humidification activation, makes absorbent remove the most of SO in flue gas2, oxidant is by remaining fraction SO2It is multistage with NO to aoxidize respectively For SO3With NO2Afterwards, then SO is removed under charged aerosolized liquid droplets with absorbent synergy3With NO2, the flue gas after desulphurization denitration From absorption tower, 9 top row goes out., through separator 10, the flue gas after separation is from the top of separator 10 for the flue gas gone out from 9 top row of absorption tower Discharge, the solid material after separation enters the divergent segment on absorption tower 9 from second screw(-type) feeder of bottom 11 of separator 10, from And realize making full use of for absorbent.
Gaseous oxidizing agent is O3、ClO2Deng.
Absorbent is calcium oxide or calcium hydroxide, or is sodio absorbent, or is magnesio absorbent.
Using the technique, desulfuration efficiency more than 95%, denitration efficiency more than 80% are capable of achieving.
Embodiment 3
A kind of semi-dry desulfurization and denitrification integral device of charged oxidation collaboration, as shown in figure 3, including absorption tower 9, absorbing The bottom of tower 9 is provided with the divergent segment that diameter gradually increases from the bottom to top, and divergent segment bottom is provided with flue gas inlet tube, the wall of divergent segment Be provided with absorbent charging aperture, absorbent charging aperture connects absorbent storehouse 5 by the first screw(-type) feeder, in absorption tower 9 in Bottom is provided with multilamellar atomizer 7, and the top on absorption tower 9 is provided with exhanst gas outlet;Wherein, the spout of multilamellar atomizer 7 to Upper setting, multilamellar atomizer 7 are connected with technique water tank 2 by technique water pump 3, and multilamellar atomizer 7 is all connected with atomization pressure Contracting air line, is provided with corona charging ring 8 above the spout of every layer of atomizer 7, corona charging ring 8 is supplied by high voltage power supply 6 Electricity.
The import connection air compressor 4 of atomization compressed air piping.Atomizer 7 is air atomizer spray nozzle.
The import connection high-pressure pump 12 of oxidant outlet pipeline.
Oxidant outlet pipeline is connected with flue gas inlet tube, and oxidant outlet pipeline and divergent segment and atomizer 7 it Between absorption tower at connect.
Exhanst gas outlet connects separator 10.The solid matter outlet of separator 10 is by the second screw(-type) feeder 11 and absorption Tower 9 connects.
Its technique is:
Gaseous oxidizer is directly delivered to the suction between flue gas inlet tube and divergent segment and atomizer 7 by high-pressure pump 12 Receive in tower 9, the fresh water (FW) in technique water tank 2 is delivered to atomizer 7 by technique water pump 3 to carry out atomization and form atomized drop, it is high After voltage source 6 is to the power supply of corona charging ring 8, make the atomized drop through corona charging ring 8 charged;From the suction in absorbent storehouse 5 Agent the first is received Jing after screw(-type) feeder is weighed and mixed homogeneously with flue gas after absorbent charging aperture enters absorption tower, is existed with flue gas Rise in absorption tower 9, the charged aerosolized liquid droplets being collectively forming with multilamellar atomizer 7 and corona charging ring 8 carry out it is multistage mix, Absorbent is carried out efficient humidification activation by charged aerosolized liquid droplets, makes absorbent remove the most of SO in flue gas2, oxidant will be surplus Remaining fraction SO2It is multistage with NO to be oxidized to SO respectively3With NO2Afterwards, then under charged aerosolized liquid droplets with absorbent synergy Remove SO3With NO2, the flue gas after desulphurization denitration goes out from 9 top row of absorption tower.The flue gas gone out from 9 top row of absorption tower is through separator 10, the flue gas after separation is discharged from the top of separator 10, bottom second spiral of the solid material after separation from separator 10 Batcher 11 enters the divergent segment on absorption tower 9, so as to realize making full use of for absorbent.
Gaseous oxidizing agent is O3、ClO2Deng.
Absorbent is calcium oxide or calcium hydroxide, or is sodio absorbent, or is magnesio absorbent.
Using the technique, desulfuration efficiency more than 95%, denitration efficiency more than 80% are capable of achieving.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not to invention protection domain Restriction, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not required to The various modifications or deformation made by creative work is paid are still within the scope of the present invention.

Claims (10)

1. a kind of semi-dry desulfurization and denitrification integral device of charged oxidation collaboration, is characterized in that, including absorption tower, the absorption The bottom of tower is provided with the divergent segment that diameter gradually increases from the bottom to top, and the divergent segment bottom is provided with flue gas inlet tube, it is described gradually The wall for expanding section is provided with absorbent charging aperture, and the absorbent charging aperture connects absorbent storehouse, institute by the first screw(-type) feeder State the middle and lower part in absorption tower and be provided with multilamellar atomizer, at the top of the absorption tower, be provided with exhanst gas outlet;Wherein, the multilamellar The spout of atomizer sets up, and the multilamellar atomizer is connected with water tank by water pump, and multilamellar atomization Nozzle is all connected with being atomized compressed air piping, and corona charging ring, the corona charging are provided with above the spout of every layer of atomizer Ring is powered by high voltage power supply, and oxidant outlet pipeline is connected with water tank, or oxidant outlet pipeline and atomization compressed air hose Road connects, or oxidant outlet pipeline is connected with absorption tower.
2. a kind of semi-dry desulfurization and denitrification integral device of charged oxidation collaboration as claimed in claim 1, is characterized in that, institute State the import connection air compressor of atomization compressed air piping;
The atomizer is air atomizer spray nozzle.
3. a kind of semi-dry desulfurization and denitrification integral device of charged oxidation collaboration as claimed in claim 1, is characterized in that, institute State oxidant outlet pipeline to be connected as with absorption tower:The oxidant outlet pipeline is connected with the flue gas inlet tube, while institute State.
4. a kind of semi-dry desulfurization and denitrification integral device of charged oxidation collaboration as claimed in claim 1, is characterized in that, institute State exhanst gas outlet connection separator;
The solid matter outlet of the separator is connected with absorption tower by the second screw(-type) feeder.
5. a kind of technique of 1,2 or 4 arbitrary described device desulphurization denitration of utilization claim, is characterized in that, oxidant is passed through After mixing to water tank with water, Jing water pumps are delivered to atomizer and carry out atomization and form atomized drop, and high voltage power supply gives corona charging ring After power supply, make the atomized drop through corona charging ring charged;The first screw(-type) feeders of absorbent Jing weigh to enter by absorbent After material mouth is mixed homogeneously with flue gas after entering absorption tower, rise in absorption tower with flue gas, with multilamellar atomizer and corona lotus The charged aerosolized liquid droplets that electric ring is collectively forming carry out multistage mixing, and absorbent is carried out efficient humidification activation by charged aerosolized liquid droplets, Absorbent is made to remove the most of SO in flue gas2, oxidant is by remaining fraction SO2It is multistage with NO to be oxidized to SO respectively3With NO2Afterwards, through charged aerosolized liquid droplets so as to removing SO3With NO2, then from absorption tower, top row goes out.
6. a kind of technique of 1,2 or 4 arbitrary described device desulphurization denitration of utilization claim, is characterized in that, by gaseous oxidizer Be passed through to atomization compressed air piping mist is formed with being atomized after compressed air mixes to deliver to jointly atomizer with water and carry out atomization Change drop, after high voltage power supply is powered to corona charging ring, make the atomized drop through corona charging ring charged;Absorbent Jing first Screw(-type) feeder is weighed after being mixed homogeneously with flue gas after absorbent charging aperture enters absorption tower, with flue gas in the absorption tower on Rise, the charged aerosolized liquid droplets being collectively forming with multilamellar atomizer and corona charging ring carry out it is multistage mix, charged aerosolized liquid droplets Absorbent is carried out into efficient humidification activation, makes absorbent remove the most of SO in flue gas2, oxidant is by remaining fraction SO2 It is multistage with NO to be oxidized to SO respectively3With NO2Afterwards, through charged aerosolized liquid droplets so as to removing SO3With NO2, then from absorption tower top row Go out.
7. a kind of technique of the arbitrary described device desulphurization denitration of utilization claim 1-4, is characterized in that, high-pressure pump is directly by gas State oxidant is delivered to different parts in absorption tower, and the water in water tank is delivered to atomizer and carries out atomization formation atomization by water pump Drop, after high voltage power supply is powered to corona charging ring, makes the atomized drop through corona charging ring charged;The first spiral shells of absorbent Jing Rotation batcher is weighed after being mixed homogeneously with flue gas after absorbent charging aperture enters absorption tower, with flue gas in the absorption tower on Rise, the charged aerosolized liquid droplets being collectively forming with multilamellar atomizer and corona charging ring carry out it is multistage mix, charged aerosolized liquid droplets Absorbent is carried out into efficient humidification activation, makes absorbent remove the most of SO in flue gas2, oxidant is by remaining fraction SO2 It is multistage with NO to be oxidized to SO respectively3With NO2Afterwards, through charged aerosolized liquid droplets so as to removing SO3With NO2, then from absorption tower top row Go out.
8. the technique of the desulphurization denitration as described in claim 5-7, is characterized in that, the absorbent is calcium-base absorbing agent, sodio Absorbent or magnesio absorbent.
9. the technique of desulphurization denitration as claimed in claim 7, is characterized in that, gaseous oxidizer is directly delivered to by high-pressure pump At absorption tower between the flue gas inlet tube and divergent segment and atomizer on absorption tower.
10. the technique of the desulphurization denitration as described in claim 5-7, is characterized in that, the flue gas gone out from absorption tower top row is passed through and divided Flue gas after device, separation is discharged from the top of separator, and the solid material after separation is given from second spiral of bottom of separator Material machine enters the divergent segment on absorption tower.
CN201610463224.5A 2016-06-23 2016-06-23 Semi-dry method desulfurization and denitrification integrated process and device in synergism with charged oxidation CN105903332B (en)

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CN1172738C (en) * 2002-09-17 2004-10-27 山东大学 Compound desulfurizing process of circulating fluidized bed boiler
JP2007253032A (en) * 2006-03-22 2007-10-04 Ihi Corp Gas-liquid contacting apparatus
CN200991635Y (en) * 2007-01-12 2007-12-19 大拇指环保科技集团(福建)有限公司 Rotary charged spraying half-dry method desulfurizing device
CN101856587B (en) * 2010-06-02 2012-08-01 山东大学 Fluidized activated carbon combined desulfurization and denitrification process
CN203484018U (en) * 2013-09-23 2014-03-19 唐山开滦兴华电缆有限公司 Charged water mist desulfurization deduster
CN203540319U (en) * 2013-10-17 2014-04-16 江苏欧超环保科技有限公司 Pre-charge spraying, desulfurizing and dust-removing device
CN205164384U (en) * 2015-08-06 2016-04-20 华电电力科学研究院 Power station flue gas static sprays desulfurization dust collector
CN205672758U (en) * 2016-06-23 2016-11-09 山东大学 The collaborative semi-dry desulfurization and denitrification integral device of a kind of charged oxidation

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