CN111530280A - Desulfurization and denitrification environment-friendly treatment method - Google Patents
Desulfurization and denitrification environment-friendly treatment method Download PDFInfo
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- CN111530280A CN111530280A CN202010384834.2A CN202010384834A CN111530280A CN 111530280 A CN111530280 A CN 111530280A CN 202010384834 A CN202010384834 A CN 202010384834A CN 111530280 A CN111530280 A CN 111530280A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8603—Removing sulfur compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
- B01J29/16—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J29/166—Y-type faujasite
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/34—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
- B01J37/349—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of flames, plasmas or lasers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention relates to a desulfurization and denitrification environment-friendly treatment method, wherein flue gas enters a first pipeline from a first air inlet, then emerges from an exhaust hole formed in the bottom of a first exhaust pipe fixedly arranged on the right side of the first pipeline and enters desulfurization solvent in a desulfurization tank body, and then a stirring shaft is driven by a stirring motor and drives stirring blades to stir the desulfurization solvent, so that desulfurization is performed by accelerating reaction. The invention optimizes the preparation process of the desulfurization and denitrification catalyst based on the prior art, increases the atmospheric pressure low-temperature plasma treatment process, and improves the desulfurization and denitrification efficiency of the desulfurization and denitrification catalyst to the maximum extent.
Description
Technical Field
The invention relates to an environment-friendly desulfurization and denitrification treatment method.
Background
Need to burn a large amount of coals at thermal power plant working process, because the coal all has more sulphide and nitride after mining, make sulphide and nitride flow along with the flue gas in the coal combustion process, current technique often adopts and sets up the chimney at the high position, directly discharge into the air with above-mentioned material, this makes the efficiency of pollutant diffusion rise at to a great extent, and influenced people's living environment on every side, make people's living condition become abominable, consequently need one kind can carry out SOx/NOx control to these flue gases, avoid the equipment of flue gas polluted environment.
At present, in the process of flue gas desulfurization and denitration, the consumption time is too long, so that the desulfurization and denitration efficiency is reduced, meanwhile, a plurality of devices adopt cyclic desulfurization and denitration and can be completed only by a plurality of cyclic desulfurization and denitration, and most of the devices adopt desulfurization and denitration together, so that the desulfurization and denitration solutions are mixed, and the mixed solutions are difficult to treat after the desulfurization and denitration are completed.
Disclosure of Invention
The invention aims to provide an environment-friendly desulfurization and denitrification treatment method to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a desulfurization and denitrification environment-friendly treatment method comprises the following steps:
1) smoke enters the first pipeline from the first air inlet and emerges from exhaust holes formed in the bottoms of a plurality of exhaust pipes fixedly arranged on the right side of the first pipeline, and a plurality of bubbles of the emerging smoke enter a desulfurization solvent in the desulfurization tank body;
2) the stirring motor drives the stirring blades on the stirring shaft to stir the desulfurization solvent in the desulfurization tank body, so that contact between the flue gas bubbles and the desulfurization solvent is accelerated, and reaction is generated;
3) the desulfurization solvent pumped by the water pump I is sprayed out from the spray heads and contacts with bubbles floating out of the desulfurization solvent in the air, desulfurization is further carried out, and the flue gas enters a second pipeline at the bottom of the denitration tank body after the flue gas desulfurization is finished;
4) the desulfurized flue gas is discharged from exhaust holes formed in the bottoms of a plurality of exhaust pipes fixedly arranged on the right side of the first pipeline, and a plurality of discharged flue gas bubbles enter a denitration solvent in the denitration tank body;
5) the corresponding stirring motor drives the stirring blades on the second stirring shaft to stir the denitration solvent in the denitration tank body, so that the contact between the flue gas bubbles and the denitration solvent is accelerated, and the reaction is generated;
6) the denitration solvent of two extractions of water pump is from a plurality of spray heads blowout on the internal portion top of denitration jar and the bubble of superficial denitration solvent contact in the air, further carries out the denitration, and the flue gas denitration is accomplished the back, discharges from the gas vent.
The desulfurization and denitrification solvent and the denitrification solvent contain desulfurization and denitrification catalysts, and the preparation method of the desulfurization and denitrification catalysts comprises the following steps:
s1 adding 10 wt% of activated carbon powder and 10 wt% of NY molecular sieve into attapulgite clay powder, adding acetic acid, stirring, extruding, molding, drying, roasting at 350 deg.C for 2 hr under nitrogen protection, grinding, and making into composite carrier;
s2, conveying the composite carrier into an atmospheric pressure low-temperature plasma device, enabling the composite carrier to be positioned at a jet outlet of the atmospheric pressure low-temperature plasma, introducing a gas medium into the atmospheric pressure low-temperature plasma device, applying working voltage to form plasma jet, controlling the moving speed of the jet outlet of the atmospheric pressure low-temperature plasma device to be 10mm/S, enabling the plasma jet to be jetted on the composite carrier, and processing the composite carrier for 30 min; the gas medium is CCl4；
S3 putting the processed composite carrier into 0.8mol/LNH4VO3And 0.5mol/LFe (NO)3)3Soaking the mixed solution for 2 hours in the same volume, drying, roasting for 3 hours at 300 ℃, grinding and sieving to obtain the desulfurization and denitrification catalyst.
The desulfurization and denitrification environment-friendly treatment equipment used by the desulfurization and denitrification environment-friendly treatment method comprises a desulfurization tank body, wherein a first agent inlet is formed in the left end of the upper surface of the desulfurization tank body, a first electric valve is fixedly mounted at the upper end of the first agent inlet, a tank cover is fixedly mounted on the upper surface of the desulfurization tank body, a first water pump is fixedly mounted at the right end of the upper surface of the desulfurization tank body, a fixed column is fixedly mounted at the top end of the interior of the desulfurization tank body, a spray head is fixedly mounted at the bottom end of the fixed column, a stirring shaft is rotatably connected to the interior of the desulfurization tank body, stirring blades are fixedly mounted on the surface of the stirring shaft, a stirring motor is rotatably connected to one end of the stirring shaft, a first air inlet is formed in the bottom of the left side of the desulfurization, the right side of the first pipeline is fixedly provided with a first exhaust pipe, the bottom of the first exhaust pipe is provided with an exhaust hole, the bottom of the first exhaust pipe is fixedly provided with a fixed plate, the fixed plate is fixedly provided with a fixed plate at the bottom wall of the inner part of the desulfurization tank body, the right side of the desulfurization tank body is provided with a liquid outlet, the right end of the liquid outlet is fixedly provided with a valve, the right side of the inner part of the desulfurization tank body is provided with a groove, the inside of the groove is fixedly provided with a filter plate, the right side of the groove is provided with a liquid suction port, the right side of the desulfurization tank body is provided with a gas outlet, the right end of the gas outlet is fixedly provided with a second gas inlet, the right end of the second gas inlet is fixedly provided with a denitration tank body, the left end of the upper surface of, the surface of the stirring shaft II is fixedly provided with a stirring blade II, the right end of the air inlet II is fixedly provided with an air guide pipe, the other end of the air guide pipe is fixedly provided with a pipeline II, the right side of the pipeline II is fixedly provided with an exhaust pipe II, the right side bottom of the denitration tank body is provided with a liquid outlet II, and the right side of the denitration tank body is provided with an air outlet. .
Preferably, the quantity of the first exhaust pipes fixedly mounted on the right sides of the first pipelines is 5, the quantity of the second exhaust pipes fixedly mounted on the right sides of the second pipelines is 5, a plurality of exhaust holes are formed in the bottoms of the first exhaust pipes and the second exhaust pipes, a fixing plate is fixedly mounted at the bottom of the second exhaust pipes, and the fixing plate is fixedly mounted at the bottom of the denitration tank body.
Preferably, the right-hand member fixed mounting of drawing liquid mouth has the liquid suction pipe, and the other end fixed mounting of liquid suction pipe is on the water pump, and the bottom fixedly connected with transfer line of water pump, the other end fixed mounting of transfer line are at the right-hand member of aqueduct, and the liquid mouth that the jar body right side of water pump two and denitration was seted up and inside top fixed mounting's aqueduct is also same connected mode, and the bottom fixed mounting of the aqueduct of the jar body top fixed mounting of denitration has the spray head.
Preferably, the number of the stirring motors is 2, the stirring motors are respectively and fixedly installed on the back surfaces of the desulfurization tank body and the denitration tank body and are respectively and rotatably connected with the stirring shaft and the stirring shaft II.
Preferably, the upper end of the agent inlet II is fixedly provided with an electric valve, and the right end of the liquid outlet II is fixedly provided with a valve.
Preferably, the number of the spraying agent heads is 5, and the spraying agent heads are fixedly arranged at the bottom of the water guide pipe at equal intervals.
Compared with the prior art, the invention has the beneficial effects that:
(1) this SOx/NOx control environmental protection processing method, in getting into pipeline one from air inlet one through the flue gas, in the exhaust hole of seting up from a blast pipe bottom of pipeline one right side fixed mounting emits the desulfurization solvent that gets into in the desulfurization jar body again, rethread agitator motor drives the (mixing) shaft, the (mixing) shaft drives stirring vane stirs the desulfurization solvent, it carries out the desulfurization to accelerate the reaction, it is also the same in the denitration jar body, accelerate the reaction and carry out the denitration, the reaction time of SOx/NOx control has been saved, the efficiency of SOx/NOx control has been improved.
(2) This desulfurization denitration environmental protection processing method, the desulfurization solvent through a pair of desulfurization jar body bottom of water pump extracts, then carry in the aqueduct of the internal portion top fixed mounting of desulfurization jar, spray from aqueduct bottom fixed mounting's spray head sprays, carry out desulfurization once more to the flue gas that floats out the desulfurization solvent, avoided circulation desulfurization step, the two pairs of denitration jar bodies of water pump also are same operation, carry out denitration once more to the flue gas that floats out the denitration solvent, avoided the step of circulation denitration.
(3) According to the desulfurization and denitrification environment-friendly treatment method, the valve on the liquid outlet formed in the bottom of the right side of the desulfurization tank body and the valve on the second liquid outlet formed in the bottom of the right side of the denitrification tank body are respectively opened, so that the desulfurization solvent waste liquid in the desulfurization tank body and the denitrification solvent waste liquid in the denitrification tank body can be separately discharged, and the condition that mixed discharge is difficult to treat is avoided.
(4) The invention optimizes the preparation process of the desulfurization and denitrification catalyst based on the prior art, increases the atmospheric pressure low-temperature plasma treatment process, and improves the desulfurization and denitrification efficiency of the desulfurization and denitrification catalyst to the maximum extent.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic view of the back structure of the desulfurization tank of the present invention;
FIG. 3 is a schematic view of a bottom structure of the exhaust pipe of the present invention;
fig. 4 is an enlarged view of a point a in fig. 1.
In the figure: 1 desulfurization tank body, 2 agent inlet I, 3 electric valve I, 4 fixing columns, 5 spray nozzles, 6 water guide pipes, 7 tank covers, 8 water pump I, 9 air outlets, 10 stirring shafts, 11 stirring blades, 12 electric valve II, 13 air inlet I, 14 pipeline I, 15 exhaust pipe I, 16 fixing plates, 17 liquid discharge ports, 18 valves, 19 air inlet II, 20 agent inlet II, 21 denitration tank body, 22 water pump II, 23 air outlets, 24 pipeline II, 25 air guide pipes, 26 exhaust pipe II, 27 liquid discharge ports II, 28 stirring shaft II, 29 stirring blade II, 30 fixing frames, 31 supporting plates, 32 stirring motors, 33 exhaust holes, 34 grooves, 35 filter plates and 36 liquid suction ports.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-4, the present invention provides a technical solution: a desulfurization and denitrification environment-friendly treatment method comprises the following steps:
1) smoke enters the first pipeline from the first air inlet and emerges from exhaust holes formed in the bottoms of a plurality of exhaust pipes fixedly arranged on the right side of the first pipeline, and a plurality of bubbles of the emerging smoke enter a desulfurization solvent in the desulfurization tank body;
2) the stirring motor drives the stirring blades on the stirring shaft to stir the desulfurization solvent in the desulfurization tank body, so that contact between the flue gas bubbles and the desulfurization solvent is accelerated, and reaction is generated;
3) the desulfurization solvent pumped by the water pump I is sprayed out from the spray heads and contacts with bubbles floating out of the desulfurization solvent in the air, desulfurization is further carried out, and the flue gas enters a second pipeline at the bottom of the denitration tank body after the flue gas desulfurization is finished;
4) the desulfurized flue gas is discharged from exhaust holes formed in the bottoms of a plurality of exhaust pipes fixedly arranged on the right side of the first pipeline, and a plurality of discharged flue gas bubbles enter a denitration solvent in the denitration tank body;
5) the corresponding stirring motor drives the stirring blades on the second stirring shaft to stir the denitration solvent in the denitration tank body, so that the contact between the flue gas bubbles and the denitration solvent is accelerated, and the reaction is generated;
6) the denitration solvent of two extractions of water pump is from a plurality of spray heads blowout on the internal portion top of denitration jar and the bubble of superficial denitration solvent contact in the air, further carries out the denitration, and the flue gas denitration is accomplished the back, discharges from the gas vent.
The desulfurization and denitrification environment-friendly treatment equipment used by the desulfurization and denitrification environment-friendly treatment method comprises a desulfurization tank body 1, the left end of the upper surface of the desulfurization tank body 1 is provided with a first agent inlet 2, the upper end of the first agent inlet 2 is fixedly provided with an electric valve 3, the upper surface of the desulfurization tank body 1 is fixedly provided with a tank cover 7, the right end of the upper surface of the desulfurization tank body 1 is fixedly provided with a first water pump 8, the top end inside the desulfurization tank body 1 is fixedly provided with a fixed column 4, the bottom end of the fixed column 4 is fixedly provided with spray heads 5, the spray heads 5 are 5 and are respectively and equidistantly and fixedly arranged at the bottom of a water guide pipe 6, the first water pump 8 extracts desulfurization solvent at the bottom of the desulfurization tank body 1 and then conveys the desulfurization solvent into the water guide pipe 6 fixedly arranged at the top inside the desulfurization tank body 1, the spray heads 5 fixedly arranged at the, the circulating desulfurization step is avoided, the water pump II 22 also operates the denitration tank body 21 in the same way, the flue gas floating out of the denitration solvent is denitrated again, and the circulating denitration step is avoided, wherein the inside of the denitration tank body 1 is rotatably connected with a stirring shaft 10, the surface of the stirring shaft 10 is fixedly provided with stirring blades 11, one end of the stirring shaft 10 is rotatably connected with a stirring motor 32, the number of the stirring motors 32 is 2, the stirring motors are respectively and fixedly arranged on the back surfaces of the denitration tank body 1 and the desulfuration tank body 21 and are respectively and rotatably connected with the stirring shaft 10 and a stirring shaft II 28, the bottom of the left side of the denitration tank body 1 is provided with a first air inlet 13, the left end of the first air inlet 13 is fixedly provided with an electric valve II 12, the right end of the first air inlet 13 is fixedly provided with a first pipeline 14, the right side of the first pipeline 14, then, the gas outlet 33 arranged at the bottom of the exhaust pipe one 15 fixedly arranged at the right side of the pipeline one 14 is blown out to enter the desulfurization solvent in the desulfurization tank body 1, the stirring shaft 10 is driven by the stirring motor 32, the stirring shaft 10 drives the stirring blades 11 to stir the desulfurization solvent, the reaction is accelerated to carry out desulfurization, the reaction is also accelerated to carry out denitrification in the denitrification tank body 21, the reaction time of desulfurization and denitrification is saved, the efficiency of desulfurization and denitrification is improved, a fixing plate 16 is fixedly arranged at the bottom of the exhaust pipe one 15, the number of the exhaust pipes one 15 fixedly arranged at the right side of the pipeline one 14 is 5, the number of the exhaust pipes two 26 fixedly arranged at the right side of the pipeline two 24 is 5, a plurality of gas outlet holes are arranged at the bottom of each exhaust pipe one and each exhaust pipe two, a fixing plate is fixedly arranged at the bottom of the exhaust pipe, a fixing plate 16 is fixedly installed on the bottom wall inside the desulfurization tank body 1, a liquid outlet 17 is formed in the right side of the desulfurization tank body 1, a valve 18 is fixedly installed at the right end of the liquid outlet 17, a groove 34 is formed in the right side inside the desulfurization tank body 1, a filter plate 35 is fixedly installed inside the groove 34, a liquid suction port 36 is formed in the right side of the groove 34, a gas outlet 9 is formed in the right side of the desulfurization tank body 1, a gas inlet II 19 is fixedly installed at the right end of the gas outlet 9, a denitration tank body 21 is fixedly installed at the right end of the gas inlet II 19, a liquid inlet II 20 is formed in the left end of the upper surface of the denitration tank body 21, a water pump II 22 is fixedly installed at the right end of the upper surface of the denitration tank body 21, a liquid suction pipe is fixedly installed at the right end of the liquid suction, a liquid suction port and a water guide pipe fixedly arranged at the top end inside are formed in the right side of the water pump II 22 and the denitration tank body 21, the same connection mode is adopted, a spray head is fixedly arranged at the bottom of the water guide pipe fixedly arranged at the top of the denitration tank body 21, a stirring shaft II 28 is rotatably connected inside the denitration tank body 21, a stirring blade II 29 is fixedly arranged on the surface of the stirring shaft II 28, an air guide pipe 25 is fixedly arranged at the right end of an air inlet II 19, a pipeline II 24 is fixedly arranged at the other end of the air guide pipe 25, an exhaust pipe II 26 is fixedly arranged at the right side of the pipeline II 24, a liquid discharge port II 27 is formed in the right side bottom of the denitration tank body 21, an electric valve is fixedly arranged at the upper end of the liquid inlet II 20, a valve is fixedly arranged at the right end of the liquid discharge port II 27, a valve 18 on, can separately discharge desulfurization solvent waste liquid in the desulfurization jar body 1 and denitration solvent waste liquid in the denitration jar body 21, avoid mixed discharge to be difficult to the handling condition, gas vent 23 has been seted up on the right side of the denitration jar body 21.
In the actual operation process, when the device is used, the electric valves corresponding to the first agent inlet 2 and the second agent inlet 20 are opened, a proper amount of desulfurizer solution and denitrifier solution are respectively injected into the desulfurization tank body 1 and the denitration tank body 2, the corresponding electric valves are closed after injection is completed, the stirring motors, the first water pumps 8 and the second water pumps 22 corresponding to the stirring shafts 10 and the second stirring shafts 28 are started, the electric valves two 12 are opened to convey flue gas to be treated from the first air inlet 13, all the stirring motors, the first water pumps 8 and the second water pumps 22 are closed after desulfurization and denitration of all the flue gas are completed, the electric valves 12 at the first air inlet 13 are closed, the valves at the first liquid outlet 17 and the second liquid outlet 27 are opened to discharge internal waste liquid, and the corresponding valves are closed after discharge.
Example 2
In example 1, the desulfurization solvent and the denitration solvent contain a desulfurization and denitration catalyst, and the preparation method of the desulfurization and denitration catalyst includes the following steps:
s1 adding 10 wt% of activated carbon powder and 10 wt% of NY molecular sieve into attapulgite clay powder, adding acetic acid, stirring, extruding, molding, drying, roasting at 350 deg.C for 2 hr under nitrogen protection, grinding, and making into composite carrier;
s2, conveying the composite carrier into an atmospheric pressure low-temperature plasma device, enabling the composite carrier to be positioned at a jet outlet of the atmospheric pressure low-temperature plasma, introducing a gas medium into the atmospheric pressure low-temperature plasma device, applying working voltage to form plasma jet, controlling the moving speed of the jet outlet of the atmospheric pressure low-temperature plasma device to be 10mm/S, enabling the plasma jet to be jetted on the composite carrier, and processing the composite carrier for 30 min; the gas medium is CCl4；
S3 putting the processed composite carrier into 0.8mol/LNH4VO3And 0.5mol/LFe (NO)3)3Soaking the mixed solution for 2 hours in the same volume, drying, roasting for 3 hours at 300 ℃, grinding and sieving to obtain the desulfurization and denitrification catalyst.
Comparative example 1
The preparation method of the desulfurization and denitrification catalyst comprises the following steps:
s1 adding 10 wt% of activated carbon powder and 10 wt% of NY molecular sieve into attapulgite clay powder, adding acetic acid, stirring, extruding, molding, drying, roasting at 350 deg.C for 2 hr under nitrogen protection, grinding, and making into composite carrier;
s2 putting the composite carrier into 0.8mol/LNH4VO3And 0.5mol/LFe (NO)3)3Soaking the mixed solution for 2 hours in the same volume, drying, roasting for 3 hours at 300 ℃, grinding and sieving to obtain the desulfurization and denitrification catalyst.
And (3) effect characterization: the desulfurization and denitrification effects of the desulfurization and denitrification catalysts of example 2 and comparative example 1 were examined, and 1.0 g of the desulfurization and denitrification catalysts of example 2 and comparative example 1 was charged into a fixed bed reactor, heated to 230 ℃ for aeration reaction, and NH was added3300ppm，NO2300ppm，SO2800ppm, balance gas N2And 5% of O2And the gas flow is 500mL/min, and the desulfurization and denitrification effects are as follows:
| numbering | Desulfurization rate | Denitration rate |
| Example 2 | 97.3％ | 95.8％ |
| Comparative example 1 | 89.2％ | 86.4％ |
As can be seen from the above results, NH was put into the composite carrier4VO3And Fe (NO)3)3The desulfurization and denitrification efficiency of the desulfurization and denitrification catalyst can be improved by carrying out atmospheric pressure low-temperature plasma treatment on the composite carrier before the mixed solution.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The desulfurization and denitrification environment-friendly treatment method is characterized by comprising the following steps:
1) flue gas enters the pipeline I (14) from the gas inlet I (13) and emerges from exhaust holes (33) formed in the bottoms of a plurality of exhaust pipes I (15) fixedly arranged on the right side of the pipeline I (14), and a plurality of emerging flue gas bubbles enter a desulfurization solvent in the desulfurization tank body (1);
2) the stirring motor (32) drives the stirring blades (11) on the stirring shaft (10) to stir the desulfurization solvent in the desulfurization tank body (1), so that contact between flue gas bubbles and the desulfurization solvent is accelerated, and reaction is generated;
3) the desulfurization solvent pumped by the water pump I (8) is sprayed out from the spray nozzles (5) and contacts with bubbles floating out of the desulfurization solvent in the air, desulfurization is further carried out, and the flue gas enters a second pipeline (24) at the bottom of the denitration tank body (21) after desulfurization is finished;
4) the desulfurized flue gas is emitted from exhaust holes formed in the bottoms of a plurality of exhaust pipes II (26) fixedly arranged on the right side of the pipeline I (24), and a plurality of emitted flue gas bubbles enter a denitration solvent in the denitration tank body (21);
5) the corresponding stirring motor drives a second stirring blade (29) on the second stirring shaft (28) to stir the denitration solvent in the denitration tank body (21), so that the contact between the flue gas bubbles and the denitration solvent is accelerated, and the reaction is generated;
6) the denitration solvent extracted by the second water pump (22) is sprayed out from a plurality of spray nozzles on the top inside the denitration tank body (21) and is contacted with bubbles floating out of the denitration solvent in the air, denitration is further carried out, and the denitration gas is discharged from an exhaust port (23) after the denitration of the flue gas is finished;
the desulfurization and denitrification solvent and the denitrification solvent contain desulfurization and denitrification catalysts, and the preparation method of the desulfurization and denitrification catalysts comprises the following steps:
s1 adding 10 wt% of activated carbon powder and 10 wt% of NY molecular sieve into attapulgite clay powder, adding acetic acid, stirring, extruding, molding, drying, roasting at 350 deg.C for 2 hr under nitrogen protection, grinding, and making into composite carrier;
s2, conveying the composite carrier into an atmospheric pressure low-temperature plasma device, enabling the composite carrier to be positioned at a jet outlet of the atmospheric pressure low-temperature plasma, introducing a gas medium into the atmospheric pressure low-temperature plasma device, applying working voltage to form plasma jet, controlling the moving speed of the jet outlet of the atmospheric pressure low-temperature plasma device to be 10mm/S, enabling the plasma jet to be jetted on the composite carrier, and processing the composite carrier for 30 min; the gas medium is CCl4；
S3 placing the treated composite vector into a chamber with a volume of 0.8 mol-LNH4VO3And 0.5mol/LFe (NO)3)3Soaking in the mixed solution for 2 hours in the same volume, drying, roasting at 300 ℃ for 3 hours, grinding, and sieving to obtain the desulfurization and denitrification catalyst;
the desulfurization and denitrification equipment used by the desulfurization and denitrification environment-friendly treatment method comprises a desulfurization tank body (1), wherein a first agent inlet (2) is formed in the left end of the upper surface of the desulfurization tank body (1), an electric valve (3) is fixedly mounted at the upper end of the first agent inlet (2), a tank cover (7) is fixedly mounted on the upper surface of the desulfurization tank body (1), a first water pump (8) is fixedly mounted at the right end of the upper surface of the desulfurization tank body (1), a fixed column (4) is fixedly mounted at the top end inside the desulfurization tank body (1), a spray head (5) is fixedly mounted at the bottom end of the fixed column (4), a stirring shaft (10) is rotatably connected inside the desulfurization tank body (1), stirring blades (11) are fixedly mounted on the surface of the stirring shaft (10), a stirring motor (32) is rotatably connected at one end of the stirring shaft (10), and a first air inlet (13) is, the left end of the first air inlet (13) is fixedly provided with an electric valve II (12), the right end of the first air inlet (13) is fixedly provided with a pipeline I (14), the right side of the pipeline I (14) is fixedly provided with an exhaust pipe I (15), the bottom of the exhaust pipe I (15) is provided with an exhaust hole (33), the bottom of the exhaust pipe I (15) is fixedly provided with a fixing plate (16), the inner bottom wall of the desulfurizing tank body (1) is fixedly provided with the fixing plate (16), the right side of the desulfurizing tank body (1) is provided with a liquid discharge port (17), the right end of the liquid discharge port (17) is fixedly provided with a valve (18), the right side of the inside of the desulfurizing tank body (1) is provided with a groove (34), the inside of the groove (34) is fixedly provided with a filter plate (35), and, the desulfurization tank comprises a desulfurization tank body (1), a gas outlet (9) is formed in the right side of the desulfurization tank body (1), a second gas inlet (19) is fixedly mounted at the right end of the gas outlet (9), a denitration tank body (21) is fixedly mounted at the right end of the second gas inlet (19), a second agent inlet (20) is formed in the left end of the upper surface of the denitration tank body (21), a second water pump (22) is fixedly mounted at the right end of the upper surface of the denitration tank body (21), a second stirring shaft (28) is rotatably connected inside the denitration tank body (21), a second stirring blade (29) is fixedly mounted on the surface of the second stirring shaft (28), a gas guide pipe (25) is fixedly mounted at the right end of the second gas inlet (19), a second pipeline (24) is fixedly mounted at the other end of the gas guide pipe (25), a second exhaust pipe (26) is fixedly mounted at the, an exhaust port (23) is formed in the right side of the denitration tank body (21).
2. The desulfurization and denitrification environment-friendly treatment method as claimed in claim 1, characterized in that: the number of the first exhaust pipes (15) fixedly mounted on the right side of the first pipeline (14) is 5, the number of the second exhaust pipes (26) fixedly mounted on the right side of the second pipeline (24) is 5, a plurality of exhaust holes are formed in the bottom of each of the first exhaust pipes and the second exhaust pipes, a fixing plate is fixedly mounted at the bottom of each of the second exhaust pipes (26), and the fixing plate is fixedly mounted at the bottom of the denitration tank body (21); the right-hand member fixed mounting of drawing liquid mouth (36) has the liquid suction pipe, the other end fixed mounting of liquid suction pipe is on water pump (8), the bottom fixedly connected with transfer line of water pump (8), the other end fixed mounting of transfer line is at the right-hand member of aqueduct (6), the aqueduct of drawing liquid mouth and inside top fixed mounting that some were seted up on two (22) of water pump and denitration jar body (21) right side, also be same connected mode, the bottom fixed mounting of the aqueduct of denitration jar body (21) top fixed mounting has the spray head.
3. The desulfurization and denitrification environment-friendly treatment method as claimed in claim 1, characterized in that: the number of the stirring motors (32) is 2, the stirring motors are respectively and fixedly arranged on the back surfaces of the desulfurization tank body (1) and the denitration tank body (21) and are respectively and rotatably connected with the stirring shaft (10) and the stirring shaft II (28); an electric valve is fixedly installed at the upper end of the agent inlet II (20), and a valve is fixedly installed at the right end of the liquid outlet II (27).
4. The desulfurization and denitrification environment-friendly treatment method as claimed in claim 1, characterized in that: the number of the spraying agent heads (5) is 5, and the spraying agent heads are respectively and fixedly arranged at the bottom of the water guide pipe (6) at equal intervals.
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