CN108261905A - A kind of denitration integrated device and method - Google Patents
A kind of denitration integrated device and method Download PDFInfo
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- CN108261905A CN108261905A CN201810305301.3A CN201810305301A CN108261905A CN 108261905 A CN108261905 A CN 108261905A CN 201810305301 A CN201810305301 A CN 201810305301A CN 108261905 A CN108261905 A CN 108261905A
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- ozone
- flue
- gas
- absorption tower
- demister
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000002002 slurry Substances 0.000 claims abstract description 84
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 63
- 238000010521 absorption reaction Methods 0.000 claims abstract description 45
- 239000007789 gas Substances 0.000 claims abstract description 44
- 239000003546 flue gas Substances 0.000 claims abstract description 33
- 239000002912 waste gas Substances 0.000 claims abstract description 33
- 239000007921 spray Substances 0.000 claims abstract description 32
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 23
- 230000023556 desulfurization Effects 0.000 claims abstract description 23
- 238000005273 aeration Methods 0.000 claims abstract description 15
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims abstract description 3
- 239000007924 injection Substances 0.000 claims abstract description 3
- 238000009826 distribution Methods 0.000 claims description 19
- 238000004140 cleaning Methods 0.000 claims description 18
- 239000013589 supplement Substances 0.000 claims description 12
- 239000003513 alkali Substances 0.000 claims description 2
- 230000003020 moisturizing effect Effects 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 abstract description 7
- 231100000719 pollutant Toxicity 0.000 abstract description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 22
- 239000007788 liquid Substances 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 8
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 235000010265 sodium sulphite Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
- B01D53/75—Multi-step processes
-
- 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
-
- 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
-
- 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
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- 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
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/104—Ozone
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention discloses a kind of denitration integrated device, including chilling flue, absorption tower and ozone generator, the present invention also provides a kind of desulfurization denitration methods, high-temp waste gas enters chilling flue, nozzle sprays low-temperature circulating slurries to high-temp waste gas, and loop slurry is alkaline, high-temp waste gas desulfurization, after desulfurization, insoluble nitrogen oxides and the ozone of ozone jet pipe injection form soluble N in flue gas2O5, and it is dissolved in water and forms nitric acid, high-temperature flue gas enters absorption tower, and the drop carried in flue gas is absorbed by demister, and the aeration structure in slurry pool can be handled the COD of loop slurry to meeting discharge standard.Denitration integrated device using the present invention carries out exhaust-gas treatment, and desulphurization denitration process carries out in chilling flue, reduces and independently handles the flow of pollutant, shorten process, simplify device structure, improves treatment effeciency.
Description
Technical field
The present invention relates to pollutant control technical field, more particularly to a kind of denitration integrated device and method.
Background technology
With country and local, China's oil petrochemical industry row increasingly stringent for the pollutant emission norm controlling of industrial waste gas
The process problem of the high-salt wastewater pollutant of industry, metal smelt industry etc. is more and more prominent, the production processes such as chemical plant, smeltery
In can generate containing pollutants such as sulfur dioxide, nitrogen oxides, dust (PM10, PM2.5), mercury, hydrogen sulfide, carbon black, hydrogen chloride
High-temperature flue gas, since dry desulfurization denitration has that low treatment effeciency, high energy consumption, medicament utilization rate are low etc., and half-dried
There is slurrying is complicated, treatment effeciency is low etc. in method, at present installed place in the especially Petrochemical Enterprises of chemical plant at home
70%, which is had more than, in reason device employs wet treatment method.
It is most using desulfurization after first denitration in purification treatment technologies such as existing wet desulphurization, denitration, dedusting, demercurations
Form, usual flow is very long, first with non-selective catalytic reduction SNCR technologies or selective catalytic reduction SCR technology or the two
With reference to denitration is carried out, the suitable warm area of 850-1050 DEG C and 300-420 DEG C is respectively necessary for, is required to be transformed boiler, change
This high operation that can also influence production upstream device is caused, reduces production capacity, in addition the treatment effeciency of SNCR denitration technology is non-
Normal low 50-70%, and SCR denitration technology needs a large amount of expensive catalyst, spent catalyst will also result in as fixed-end forces
After-treatment is born；Drain processing unit would generally be configured in conventional wet lay desulfurization, be provided with oxidation tank or aeration tank, special to locate
COD etc. is managed, otherwise discharging any waste liquor is difficult to qualified discharge, also increases the processing load of sewage treatment plant.
Therefore, how to change in the prior art, the present situation of desulfurizing and denitrifying process inefficiency and complex disposal process, be this
Field technology personnel's urgent problem to be solved.
Invention content
The object of the present invention is to provide a kind of denitration integrated device and methods, exist to solve the above-mentioned prior art
The problem of, the treatment effeciency of raising wet desulphurization denitration.
To achieve the above object, the present invention provides following schemes：The present invention provides a kind of denitration integrated device,
Including chilling flue, absorption tower and ozone generator, described chilling flue one end is connected with high-temp waste gas, the chilling flue
The other end be connected with the absorption tower, setting ozone jet pipe and nozzle, the ozone jet pipe and institute in the chilling flue
It states ozone generator to be connected, demister and slurry pool, the nozzle is set to be connected with the slurry pool in the absorption tower,
The slurry pool is set to the lower part of the demister, and the slurry pool bottom sets aeration structure, the chilling flue and institute
The connectivity part on absorption tower is stated between the demister and the slurry pool, the absorption tower sets exhanst gas outlet, the cigarette
Gas outlet is positioned at the top of the demister.
Preferably, denitration integrated device further includes heat exchanger, and the chilling flue passes through the heat exchanger and height
Warm exhaust gas is connected, and the exhanst gas outlet is connected by the heat exchanger with external environment.
Preferably, the chilling flue is vertically arranged, and the upper end of the chilling flue is connected with high-temp waste gas, the urgency
The lower end in cold smoke road is connected with the absorption tower, and the nozzle is inverse spray nozzle.
Preferably, the ozone jet pipe includes ozone manifold and several ozone branch pipes, the ozone manifold and the ozone
Generator is connected, and the ozone branch pipe is connected with the ozone manifold, and jet port, the spray are set on the ozone branch pipe
Angle between the axis direction of loophole and the flow direction of high-temperature flue gas is 45 °.
Preferably, the nozzle is connected by circulation slurry pump with the slurry pool, and the circulation slurry pump is also connected with
There is lye to add structure and pH control structures, the pH control structures are capable of the pH value of test loop slurries, and the lye adds
Structure can add lye into loop slurry.
Preferably, the aeration structure includes gas distribution pipe, and the gas distribution pipe includes gas distribution supervisor and gas distributionbranch pipe, the cloth
Gas branch pipe is connected with gas distribution supervisor, and the gas distributionbranch pipe makees tree form distribution, the gas distributionbranch pipe along gas distribution supervisor
It is upper to be evenly distributed with solarization air cap.
Preferably, the demister is two-stage, and demister described in two-stage is superposed.
Preferably, the absorption tower also sets up cleaning spray structure, and the cleaning spray structure is connected with external water source,
The cleaning spray structure is level Four, and level Four cleaning spray structure is respectively arranged at the both sides of demister described in two-stage, and described
Cleaning spray structure carries out cleaning showers respectively for both sides under the beam of the demister.
Preferably, the absorption tower is also provided with water supplement structure, and the water supplement structure is connected with the slurry pool, described
Water supplement structure can supplement process water into the slurry pool.
The present invention also provides a kind of desulfurization denitration methods, comprise the following steps：
Step 1: high-temp waste gas enters chilling flue, nozzle sprays low-temperature circulating slurries to high-temp waste gas, and loop slurry is
Alkalinity, high-temp waste gas desulfurization；
Step 2: after desulfurization, insoluble nitrogen oxides is formed soluble with the ozone that ozone jet pipe sprays in flue gas
N2O5, and be dissolved in water and form nitric acid；
Step 3: high-temperature flue gas enters absorption tower, the drop carried in flue gas is absorbed by demister, the aeration in slurry pool
Structure can be handled the COD of loop slurry to meeting discharge standard.
The present invention achieves following technique effect relative to the prior art：Desulfurization and denitrification integral dress provided by the invention
Put, including chilling flue, absorption tower and ozone generator, chilling flue one end is connected with high-temp waste gas, chilling flue it is another
One end is connected with absorption tower, and setting ozone jet pipe and nozzle, ozone jet pipe are connected with ozone generator in chilling flue, nozzle
It is connected with slurry pool, demister and slurry pool, slurry pool is set to be set to the lower part of demister, slurry pool bottom in absorption tower
Between demister and slurry pool, absorption tower setting flue gas goes out the connectivity part on setting aeration structure, chilling flue and absorption tower
Mouthful, exhanst gas outlet is located at the top of demister.The present invention also provides a kind of desulfurization denitration method, high-temp waste gas enters chilling cigarette
Road, nozzle spray low-temperature circulating slurries to high-temp waste gas, and loop slurry is alkaline, high-temp waste gas desulfurization, after desulfurization, in flue gas not
Soluble nitrogen oxides and the ozone of ozone jet pipe injection form soluble N2O5, and be dissolved in water and form nitric acid, high-temperature flue gas enters
Absorption tower, the drop carried in flue gas are absorbed by demister, and the aeration structure in slurry pool can be by the COD processing of loop slurry
To meeting discharge standard.Denitration integrated device using the present invention carries out exhaust-gas treatment, and desulphurization denitration process is in urgency
It is carried out in cold smoke road, reduces and independently handle the flow of pollutant, shorten process, simplify device structure, improve
Treatment effeciency.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the overall structure diagram of the denitration integrated device of the present invention；
Wherein, 1 is heat exchanger, and 2 be chilling flue, and 3 be nozzle, and 4 be ozone generator, and 5 be ozone jet pipe, and 6 be cycle
Slurries pump, and 7 be absorption tower, and 8 be demister, and 9 be slurry pool.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of denitration integrated device and method, to solve of the existing technology ask
Topic improves the treatment effeciency of wet desulphurization denitration.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
It please refers to Fig.1, Fig. 1 is the overall structure diagram of the denitration integrated device of the present invention.
The present invention provides a kind of denitration integrated device, including chilling flue 2, absorption tower 7 and ozone generator 4,
2 one end of chilling flue is connected with high-temp waste gas, and the other end of chilling flue 2 is connected with absorption tower 7, is set in chilling flue 2
Ozone jet pipe 5 and nozzle 3 are put, ozone jet pipe 5 is connected with ozone generator 4, setting demister 8 and slurry pool in absorption tower 7
9, nozzle 3 is connected with slurry pool 9, and slurry pool 9 is set to the lower part of demister 8, and setting aeration structure in 9 bottom of slurry pool is anxious
For the connectivity part on cold smoke road 2 and absorption tower 7 between demister 8 and slurry pool 9, absorption tower 7 sets exhanst gas outlet, exhanst gas outlet
Positioned at the top of demister 8.
When handling exhaust gas using the denitration integrated device of the present invention, high-temp waste gas enters chilling flue 2, nozzle 3
Low-temperature circulating slurries are sprayed to high-temp waste gas, loop slurry is alkalinity, and high-temp waste gas desulfurization is insoluble in flue gas after desulfurization
The ozone that nitrogen oxides is sprayed with ozone jet pipe 5 forms soluble N2O5, and be dissolved in water and form nitric acid, high-temperature flue gas enters absorption
Tower 7, the drop carried in flue gas are absorbed by demister 8, and the aeration structure in slurry pool 9 can be by the COD processing of loop slurry
To discharge standard is met, the process of desulphurization denitration, which is intersected, to be carried out, and simplifies technological process, improves utilization ratio of device and processing is imitated
Rate.
Specifically, denitration integrated device further includes heat exchanger 1, and chilling flue 2 passes through heat exchanger 1 and high-temp waste gas
It is connected, exhanst gas outlet is connected by heat exchanger 1 with external environment.High-temp waste gas and the wet flue gas by desulphurization denitration processing
By heat exchanger 1, can not only in advance it be cooled down to high-temp waste gas, the flue-gas temperature that can also make that treated is higher than dew point temperature
Degree, avoids causing acid corrosion to equipment, the flue gas for being discharged into air is not easy to condense out free water in the short time, therefore be not easy to occur
Visual white misty rain, there will not be saliferous drop and is dripped in ground layer, reduced to neighbouring device, agricultural land soil and life
The harm in area living etc..
Wherein, chilling flue 2 is vertically arranged, and the upper end of chilling flue 2 is connected with high-temp waste gas, under chilling flue 2
End is connected with absorption tower 7, and nozzle 3 is inverse spray nozzle 3, is nozzle 3 of the large aperture without blocking, reversely sprays height with high-temp waste gas
The loop slurry of high flow capacity is pressed, loop slurry encounters high temperature smoke waste gas, and gas-liquid intense contact forms the foam regions of strong turbulence, dimension
Hold momentum balance, desulfurization dust-removing efficiency is high, and during spray, every cubic metre of flue gas sprays 5-12L loop slurries, the pressure of inverse spray nozzle 3
2-2.5kPa is reduced to, the pressure drop of whole device is less than 8kPa.
More specifically, ozone jet pipe 5 includes ozone manifold and several ozone branch pipes, ozone manifold and 4 phase of ozone generator
Connection, ozone branch pipe are connected with ozone manifold, and jet port, the axis direction and high-temperature flue gas of jet port are set on ozone branch pipe
Flow direction between angle be 45 °.Ozone jet pipe 5 sprays ozone to high-temperature flue gas, and ozone can be with the nitrogen oxygen in exhaust gas
Compound react, the strong oxidizing property of ozone and it is highly selective obtain more than 98% denitration efficiency.It is herein it should be noted that few
Amount has neither part nor lot in the ozone of denitration, available for the sodium sulfite in the loop slurry of part is oxidized to sodium sulphate, without being equipped with ozone
Destructor prevents secondary pollution.
Further, nozzle 3 is connected by circulation slurry pump 6 with slurry pool 9, and circulation slurry pump 6 can be by absorption tower 7
The loop slurry of bottom of towe is delivered to nozzle 3 and is sprayed, while by part loop slurry discharger；Circulation slurry pump 6 also connects
It is connected to lye and adds structure and pH control structures, pH control structures are capable of the pH value of test loop slurries, and lye adds structure energy
It is enough that lye is added into loop slurry.In this embodiment, the lye added into loop slurry is sodium hydroxide, is passed through
The sulfur dioxide for crossing 3 spray-absorption of nozzle is dissolved in loop slurry, and is constantly reacted with sodium hydroxide, formed sodium sulfite and
Sodium sulphate is constantly accumulated in loop slurry, and the density or proportion in loop slurry constantly increase, for that purpose it is necessary to constantly by it
In a small amount of absorbing liquid discharge to prevent sodium salt from accumulating and crystallize on the wall.It is drawn by being mounted on from device major cycle pipeline
Small diameter pipeline on densimeter measure density of liquid phase；Density or rate of specific gravity control pass through regulating valve 1.1 or so
Control the discharge capacity of waste liquid.
In addition, aeration structure includes gas distribution pipe, gas distribution pipe includes gas distribution supervisor and gas distributionbranch pipe, gas distributionbranch pipe and gas distribution master
Pipe is connected, and gas distributionbranch pipe makees tree form distribution along gas distribution supervisor, is evenly distributed with solarization air cap on gas distributionbranch pipe, improves aeration effect.
Further, demister 8 is two-stage, and two-stage demister 8 is superposed.Ground is corresponded, absorption tower 7 is also set
Cleaning spray structure is put, cleaning spray structure is connected with external water source, and cleaning spray structure is level Four, and level Four cleaning spray is tied
Structure is respectively arranged at the both sides of two-stage demister 8, and cleaning spray structure is sprayed respectively for both sides under the beam of demister 8
Cleaning, effectively avoids 8 fouling and clogging of demister.
Absorption tower 7 is also provided with water supplement structure, and water supplement structure is connected with slurry pool 9, and water supplement structure can be to slurry pool 9
Middle supplement process water.With the discharge of wet flue gas after desulphurization denitration, part loop slurry is vaporized, and causes system water loss,
The liquid level in absorption tower 7 is reduced, in addition, since salt accumulation inorganic in waste liquid, density increase and continuous discharge unit waste liquid
So that liquid level constantly reduces, absorption tower 7 operates under conditions of no liquid phase in order to prevent, while maintains the water balance of system,
The liquid level on absorption tower 7 must be controlled, while supplement fresh water, so that device works normally；Using differential pressure transmitter
Control liquid level, liquid level gauge is mounted on the side wall of container, as liquid level reduces, opening regulating valve makes fresh water enter absorption tower
In 7.
The present invention also provides a kind of desulfurization denitration methods, comprise the following steps：
Step 1: high-temp waste gas enters chilling flue 2, nozzle 3 sprays low-temperature circulating slurries, loop slurry to high-temp waste gas
For alkalinity, high-temp waste gas desulfurization；
Step 2: after desulfurization, insoluble nitrogen oxides is formed soluble with the ozone that ozone jet pipe 5 sprays in flue gas
N2O5, and be dissolved in water and form nitric acid；
Step 3: high-temperature flue gas enters absorption tower 7, the drop carried in flue gas is absorbed by demister 8, in slurry pool 9
Aeration structure can be handled the COD of loop slurry to meeting discharge standard.
After high-temperature flue gas enters denitration integrated device, high-temp waste gas is formed by force with inverse spray loop slurry intense contact
Behind the froth zone of turbulent flow standing wave, gas cooling water saturation after, gas-liquid contact formed strong turbulence standing wave foam regions, gas-liquid it is mutual
Mutually push keeps momentum balance, makes that froth zone is stable, increases contact effect, flue gas persistently cool down reach adiabatic saturation temperature and
Water saturation, while the SO in flue gas2With dust by liquid absorption.After contact, liquid falls on slurry pool 9, passes through circulation slurry pump 6
Pump drains into nozzle 3 and is recycled, and lye is added on loop slurry pipeline by pH control structures, neutralizes the SO of absorption2, carry
High desulfurization efficiency；After above-mentioned high-temp waste gas and inverse jetting liquid intense contact form the froth zone of strong turbulence standing wave, into ozone
Jeting area, insoluble nitrogen oxides (is typically NO and NO in the ozone and flue gas of this region injected system2) rapid
Reaction forms soluble N2O5, it reacts to form nitric acid with water, be sprayed using the loop slurry for having filled alkali neutralization, it is anti-with nitric acid
NaNO should be generated3.The desulphurization denitration process of the present invention carries out in chilling flue 2, reduces and independently handles pollutant
Flow, shorten process, simplify device structure, improve treatment effeciency.
Specific case is applied in the present invention to be expounded the principle of the present invention and embodiment, above example
Illustrate to be merely used to help understand method and its core concept of the invention；Meanwhile for those of ordinary skill in the art, according to
According to the thought of the present invention, in specific embodiments and applications there will be changes.In conclusion the content of the present specification
It should not be construed as limiting the invention.
Claims (10)
1. a kind of denitration integrated device, it is characterised in that：It is described including chilling flue, absorption tower and ozone generator
Chilling flue one end is connected with high-temp waste gas, and the other end of the chilling flue is connected with the absorption tower, the chilling
Setting ozone jet pipe and nozzle, the ozone jet pipe are connected with the ozone generator in flue, are set in the absorption tower
Demister and slurry pool, the nozzle are connected with the slurry pool, and the slurry pool is set to the lower part of the demister, institute
State slurry pool bottom setting aeration structure, the connectivity part on the chilling flue and the absorption tower is located at the demister and described
Between slurry pool, the absorption tower sets exhanst gas outlet, and the exhanst gas outlet is located at the top of the demister.
2. denitration integrated device according to claim 1, it is characterised in that：Further include heat exchanger, the chilling
Flue is connected by the heat exchanger with high-temp waste gas, and the exhanst gas outlet is connected by the heat exchanger with external environment
It is logical.
3. denitration integrated device according to claim 1, it is characterised in that：The chilling flue is vertically arranged,
The upper end of the chilling flue is connected with high-temp waste gas, and the lower end of the chilling flue is connected with the absorption tower, described
Nozzle is inverse spray nozzle.
4. denitration integrated device according to claim 2, it is characterised in that：It is total that the ozone jet pipe includes ozone
Pipe and several ozone branch pipes, the ozone manifold are connected with the ozone generator, and the ozone branch pipe and the ozone are total
Pipe is connected, and sets jet port on the ozone branch pipe, the axis direction of the jet port and the flow direction of high-temperature flue gas it
Between angle be 45 °.
5. denitration integrated device according to claim 1, it is characterised in that：The nozzle passes through circulation slurry pump
It is connected with the slurry pool, the circulation slurry pump is also associated with lye and adds structure and pH control structures, the pH controls
Structure is capable of the pH value of test loop slurries, and the lye adds structure can add lye into loop slurry.
6. denitration integrated device according to claim 1, it is characterised in that：The aeration structure includes gas distribution
Pipe, the gas distribution pipe include gas distribution supervisor and gas distributionbranch pipe, and the gas distributionbranch pipe is connected with gas distribution supervisor, the gas distribution
Branch pipe makees tree form distribution along gas distribution supervisor, and solarization air cap is evenly distributed on the gas distributionbranch pipe.
7. denitration integrated device according to claim 1, it is characterised in that：The demister be two-stage, two-stage
The demister is superposed.
8. denitration integrated device according to claim 7, it is characterised in that：The absorption tower also sets up cleaning spray
Structure is drenched, the cleaning spray structure is connected with external water source, and the cleaning spray structure is level Four, and level Four cleaning spray is tied
Structure is respectively arranged at the both sides of demister described in two-stage, and the cleaning spray structure is respectively under the beam of the demister two
Side carries out cleaning showers.
9. denitration integrated device according to claim 8, it is characterised in that：The absorption tower is also provided with moisturizing
Structure, the water supplement structure are connected with slurry pool, and the water supplement structure can supplement process water into the slurry pool.
10. a kind of desulfurization denitration method, special using such as claim 1-9 any one of them denitration integrated device
Sign is to comprise the following steps：
Step 1: high-temp waste gas enters chilling flue, nozzle sprays low-temperature circulating slurries to high-temp waste gas, and loop slurry is alkali
Property, high-temp waste gas desulfurization；
Step 2: after desulfurization, insoluble nitrogen oxides and the ozone of ozone jet pipe injection form soluble N in flue gas2O5, and
It is dissolved in water and forms nitric acid；
Step 3: high-temperature flue gas enters absorption tower, the drop carried in flue gas is absorbed by demister, the aeration structure in slurry pool
The COD of loop slurry can be handled to meeting discharge standard.
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| CN201810305301.3A CN108261905A (en) | 2018-04-08 | 2018-04-08 | A kind of denitration integrated device and method |
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| CN111346479A (en) * | 2020-03-16 | 2020-06-30 | 上海化工研究院有限公司 | Marine diesel engine waste gas foam washing cooling dust removal desulfurization integrated device |
| CN111380058A (en) * | 2020-03-31 | 2020-07-07 | 无锡市华星东方电力环保科技有限公司 | Waste incineration system with waste heat recovery device |
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Application publication date: 20180710 |