CN107308812A - The system and method for low temperature organic catalysis oxidizing and denitrating ozone - Google Patents
The system and method for low temperature organic catalysis oxidizing and denitrating ozone Download PDFInfo
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- CN107308812A CN107308812A CN201710657714.3A CN201710657714A CN107308812A CN 107308812 A CN107308812 A CN 107308812A CN 201710657714 A CN201710657714 A CN 201710657714A CN 107308812 A CN107308812 A CN 107308812A
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- Prior art keywords
- ozone
- distributor
- scrubbing tower
- flue
- flue gas
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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
-
- 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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/104—Ozone
Abstract
The present invention discloses a kind of system and method for low temperature organic catalysis oxidizing and denitrating ozone, including flue, ozone generator, scrubbing tower, characterized in that, being provided with ozone distributor in the scrubbing tower, ozone is injected in scrubbing tower by the outlet of the ozone distributor by nozzle.Present invention is mainly applied to the industry such as thermoelectricity, steel, coking Industrial Boiler and kiln gas low temperature organic catalysis oxidizing and denitrating ozone field, it is consistent with flue gas flow direction that ozone sprays into direction, in the absence of blockage problem, oxidation efficiency is promoted, practical engineering application is with the obvious advantage.
Description
Technical field
The present invention relates to the systems technology field of organic catalysis oxidizing and denitrating ozone, have in particular to a kind of low temperature
The system and method for machine O3 catalytic oxidation denitration.
Background technology
Nitrogen oxides (NOx) is main atmosphere pollution, is to influence the principal element of air quality.Nitrogen oxides and carbon
Hydrogen compound effect can form photochemical fog, while NO in airxIt is also one of major reason that haze is produced.Due to cigarette
NO in gasxIn 95% above is NO, need that NO first is oxidized into NO2, oxidation removal technology has a variety of.
Compared with fire coal boiler fume, the NOx of flue gases of cock oven has its own feature：(1) change in concentration scope is wide and dense
Degree is high, NOxChange in concentration scope is 300~1200mg/m3；(2) temperature of coke oven flue gas is relatively low (180~300 DEG C), and low temperature is led
The applicability of the selective catalytic reduction SCR denitration system of main flow is caused to go wrong；(3) NO in flue gasxConcentration is with production
The crest and trough difference of cyclically-varying and levels are larger.Catalytic denitration system route key technology is low-temperature catalyzed
The exploitation of agent and system are realized.
CN100354022C discloses a kind of ozone oxidation and denitration method of boiler flue gas, in its technical scheme, in temperature model
Ozone is sprayed between enclosing 100~150 DEG C, oxidation of nitric oxide in flue gas is turned into higher nitrogen oxides soluble in water, and make
The nitrogen oxides washed with alkali lye in treated flue gas, removing flue gas.
Problem present in above-mentioned technical proposal implementation process is, because boiler smoke temperature is higher, the half-life period of ozone
Shorten with the rise of temperature, so the utilization rate of ozone is low, denitration is incomplete, the inefficiency of whole system.
At present, odor at low temperature oxidation and denitration technology angularly considers all to occupy certain from removal effect, investment operating cost
Advantage, as relevant industries or enterprise control NOxDischarge focus of attention.
The content of the invention
It is a primary object of the present invention to provide a kind of system and method for low temperature organic catalysis oxidizing and denitrating ozone, to solve
The problem of ozone certainly of the prior art contacts with high-temperature flue gas and makes ozone decay quickening.
To achieve these goals, according to an aspect of the invention, there is provided a kind of low temperature organic catalysis ozone oxidation
Ozone distributor is installed, ozone occurs in the system and method for denitration, including flue, ozone generator, scrubbing tower, scrubbing tower
The outlet of device is delivered to by pipeline in the ozone pipeline of ozone distributor, and ozone is ejected into scrubbing tower by ozone distributor
In, ozone is mixed with flue gas in scrubbing tower.
Further, the top of scrubbing tower is connected by pipeline with pump, and alkali lye or water containing catalyst are delivered to and washed by pump
Wash in tower, and/or ozone generator is connected with source of oxygen, and oxygen, and/or ozone point are provided ozone generator by source of oxygen
Cloth device is provided with several injection structures, can be ejected ozone by injection structure, and/or provided with nitrogen oxides biography in flue
Sensor, NOx sensor is connected with control device, and induced signal is sent into control device, and control device is sent out with ozone
Connected between raw device by wire, control device is sent control signal to ozone according to the amount of nitrogen oxides detected
Generator.
Further, the injection structure of ozone distributor is evenly distributed on the section of scrubbing tower, so that injection structure sprays
The ozone shot out is sufficiently mixed with flue gas.
Further, ozone distributor, is made up of, injection unit connects with ozonizer the docking of several ozone injection units
Connect.
Further, ozone distributor channel interior is passed through ozone gas, and ozone distributor pipeline is provided with ozone inlet, uses
It is connected and sealed to be connected with ozone generator, and/or after the docking of two neighboring ozone injection unit by the way of welding,
And/or forming lattice-shaped structure after the ozone injection unit docking of ozone distributor, it is preferable that ozone distributor is preferably circular
Or square lattice-shaped.
There is provided a kind of system of low temperature organic catalysis oxidizing and denitrating ozone and side according to another aspect of the present invention
Method, including Step 1: the flue gas containing nitrogen oxides is sent into exhaust gases passes；Step 2: the flue gas containing nitrogen oxides passes through
After the enriching section of scrubbing tower, flue-gas temperature is down to less than 80 DEG C；Step 3: after enriching section, the flue gas containing nitrogen oxides
It is sufficiently mixed with the ozone of ozone distributor, nitrogen oxides is occurred oxidation reaction with ozone；Step 4: by ozone oxidation
Flue gas enters the absorber portion of scrubbing tower.
Further, in step 4, scrubbing tower absorber portion spray alkali lye or water make the nitrogen oxides after oxidation be dissolved into alkali
In liquid or water；Preferably, in step one, detected by the content to the nitrogen oxides in flue, detection signal is sent
To control device, control device controls the size of ozone supply amount according to detection signal；Preferably, in step 3, ozone and cigarette
Gas flows to identical direction to injection；Preferably, in step 3, ozone distributor is transversely mounted on using gridiron and washed
Wash in tower.
Apply the technical scheme of the present invention, compared with ozone denitrating system of the ozone distributor in flue, ozone and cigarette
The temperature of solid/liquid/gas reactions is lower；Scrubbing tower inner section product is bigger, contributes to contact of the ozone with flue gas.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 diagrammatically illustrates the structure chart of the embodiment of the ozone distributor of the present invention；And
The system that Fig. 2 diagrammatically illustrates a kind of low temperature organic catalysis oxidizing and denitrating ozone of the present invention.
Wherein, above-mentioned accompanying drawing is marked including the following drawings：
1st, ozone generator；2nd, ozone thinning tank；3rd, dilution air；4th, ozone distributor；5th, ozone mixer；6th, cigarette
Road；7th, ammonia water tank；8th, aqua ammonia pump；9th, circulating pump；10th, scrubbing tower；11st, source of oxygen；12nd, NOx sensor；13rd, control dress
Put.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
The preferred embodiments of the present invention are illustrated below, it will be appreciated that preferred embodiment described herein is only used
In the description and interpretation present invention, it is not intended to limit the present invention.
Referring to shown in Fig. 1 and Fig. 2, in the present embodiment there is provided a kind of system of low temperature organic catalysis oxidizing and denitrating ozone
And method, system and device include ozone generator 1, ozone thinning tank 2, dilution air 3, ozone distributor 4, ozone mixer 5,
Flue 6, ammonia water tank 7, aqua ammonia pump 8, circulating pump 9, scrubbing tower 10, source of oxygen 11, NOx sensor 12, control device 13.
Ozone distributor 4 is installed, ozone is fed to ozone by the outlet of the ozone generator 1 by pipeline in the scrubbing tower 10
In the ozone distributor pipeline of distributor 4, ozone is ejected into scrubbing tower 10 by ozone distributor 4.Flue gas passes through flue 6
Into the described outlet of flue 6 is connected with the scrubbing tower 10, the flue gas in flue 6 is entered in scrubbing tower.
The top of the scrubbing tower 10 is connected by pipeline with circulating pump 9, and the circulating pump 9 will be mixed below scrubbing tower 10
Saline solution is closed to deliver in the scrubbing tower.It is described to mix the top that saline solution delivers to the scrubbing tower 10, the flue 6 and the washing
The bottom of tower 10 is connected, and flue gas is moved from bottom to top in scrubbing tower 10, is mixed saline solution and is sprayed from top to bottom, makes flue gas and mixing
The contact area increase of saline solution.
It is described to mix the mixing saline solution that saline solution is catalyst, ammonium sulfate and ammonium nitrate.
NOx sensor is provided with the flue 6, the NOx sensor 12 is connected with control device 13, and
By induced signal transmission control device 13, connected between the control device 13 and the ozone generator 1 by wire, make institute
Control signal can be sent to ozone generator 1 according to the amount of nitrogen oxides detected by stating control device 13.
The ozone generator 1 is connected with source of oxygen.
The injection structure of the ozone distributor 4 is evenly distributed on the section of scrubbing tower 10, so that injection structure sprays
Ozone out is sufficiently mixed with flue gas.
The ozone distributor 4 is made up of several injection units.
The ozone distributor channel interior is passed through ozone gas, and ozone distributor pipeline is provided with ozone inlet, to
The ozone generator 1 is connected.
Lattice-shaped structure is formed after the ozone injection unit docking of the ozone distributor 4.
A kind of method of low temperature organic catalysis oxidizing and denitrating ozone comprises the following steps：Step 1: nitrogen oxides will be contained
Flue gas feeding exhaust gases passes；Step 2: the flue gas containing nitrogen oxides is after the enriching section of scrubbing tower 10, flue-gas temperature drop
To 80 DEG C；Step 3: after enriching section, the ozone of the flue gas containing nitrogen oxides and ozone distributor 4 is sufficiently mixed, and makes nitrogen
With ozone oxidation reaction occurs for oxide；Step 4: the flue gas by ozone oxidation enters the absorber portion of scrubbing tower 10.
In step 4, scrubbing tower absorber portion spray alkali lye or water, make the nitrogen oxides after oxidation be dissolved into alkali lye or
In water；
Embodiment 2
A kind of system and method for low temperature organic catalysis oxidizing and denitrating ozone is present embodiments provided, system and device includes smelly
Oxygen Generator 1, ozone thinning tank 2, dilution air 3, ozone distributor 4, ozone mixer 5, flue 6, ammonia water tank 7, aqua ammonia pump
8th, circulating pump 9, scrubbing tower 10, source of oxygen 11, NOx sensor 12, control device 13.It is provided with the scrubbing tower 10
Ozone is fed to the ozone distributor of ozone distributor 4 by pipeline by ozone distributor 4, the outlet of the ozone generator 1
In pipeline, ozone is ejected into scrubbing tower 10 by ozone distributor 4.Flue gas is entered by flue 6, and described flue 6 goes out
Mouth is connected with the scrubbing tower 10, the flue gas in flue 6 is entered in scrubbing tower.
The top of the scrubbing tower 10 is connected by pipeline with circulating pump 9, and the circulating pump 9 will be mixed below scrubbing tower 10
Saline solution is closed to deliver in the scrubbing tower.It is described to mix the top that saline solution delivers to the scrubbing tower 10, the flue 6 and the washing
The bottom of tower 10 is connected, and flue gas is moved from bottom to top in scrubbing tower 10, is mixed saline solution and is sprayed from top to bottom, makes flue gas and mixing
The contact area increase of saline solution.
It is described to mix the mixing saline solution that saline solution is catalyst, ammonium sulfate and ammonium nitrate.
NOx sensor is provided with the flue 6, the NOx sensor 12 is connected with control device 13, and
By induced signal transmission control device 13, connected between the control device 13 and the ozone generator 1 by wire, make institute
Control signal can be sent to ozone generator 1 according to the amount of nitrogen oxides detected by stating control device 13.
The ozone generator 1 is connected with source of oxygen.
The injection structure of the ozone distributor 4 is evenly distributed on the section of scrubbing tower 10, so that injection structure sprays
Ozone out is sufficiently mixed with flue gas.
The ozone distributor 4 is made up of several injection units.
The ozone distributor channel interior is passed through ozone gas, and ozone distributor pipeline is provided with ozone inlet, to
The ozone generator 1 is connected.
Lattice-shaped structure is formed after the ozone injection unit docking of the ozone distributor 4.
A kind of method of low temperature organic catalysis oxidizing and denitrating ozone comprises the following steps：Step 1: nitrogen oxides will be contained
Flue gas feeding exhaust gases passes；Step 2: the flue gas containing nitrogen oxides is after the enriching section of scrubbing tower 10, flue-gas temperature drop
To 80 DEG C；Step 3: after enriching section, the ozone of the flue gas containing nitrogen oxides and ozone distributor 4 is sufficiently mixed, and makes nitrogen
With ozone oxidation reaction occurs for oxide；Step 4: the flue gas by ozone oxidation enters the absorber portion of scrubbing tower 10.Step 4
In, the scrubbing tower absorber portion spray alkali lye or water make the nitrogen oxides after oxidation be dissolved into alkali lye or water；
It is compared with the prior art, the present invention has the following effects that：
Investment and operating cost than SCR system is low；NOx clearances are high；Simple system, it is simple to operate, it is stable can
Lean on；It is wide that system adapts to industry；The ammonium sulfate and ammonium nitrate fertilizer of generation are directly entered the existing sulphur ammonium system in coke-oven plant, therefore without two
Secondary pollution, no wastewater discharge, while certain economic benefit can be produced；High temperature section is not needed, is more suitable for coke-oven plant's low temperature
The desulphurization denitration of coke oven flue gas.The medium of this system for desulfuration and denitration major control is ammoniacal liquor, ozone and fertilizer solution, passes through regulation
The means such as ozone concentration, bottom of towe solution ph, fertilizer solution concentration can be achieved with continuous, the stable operation of production.Ozone and NOx
The accessory substance of reaction is oxygen, non-secondary pollution.
Compared with ozone denitrating system of the ozone distributor in flue, the temperature of ozone and smoke reaction is lower；Washing
Tower inner section product is bigger, contributes to contact of the ozone with flue gas；
Reaction temperature of the present invention is low, and reaction speed is fast, at the same it is insensitive to other compositions in flue gas, therefore system arrangement spirit
It is living, influenceed small by flue gas condition, simple system is easy to operation.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (7)
1. a kind of system of low temperature organic catalysis oxidizing and denitrating ozone, including flue, ozone generator, scrubbing tower, its feature exist
In being provided with ozone distributor in the scrubbing tower, the ozone is by pipeline to deliver to ozone by the outlet of ozone generator
In the pipeline of distributor, ozone is ejected into scrubbing tower by ozone distributor, ozone is mixed with flue gas in scrubbing tower.
2. system according to claim 1, it is characterised in that the top of the scrubbing tower is connected by pipeline with pump, institute
Pump is stated to deliver to alkali lye or water containing catalyst in scrubbing tower, and/or
The ozone generator is connected with source of oxygen, and oxygen is provided the ozone generator by source of oxygen, and/or
The ozone distributor is provided with several injection structures, can be ejected ozone by injection structure, and/or
NOx sensor is provided with the flue, the NOx sensor is connected with control device, and sensing is believed
Number control device is sent to, is connected between the control device and the ozone generator by wire, make the control device
Control signal can be sent according to the amount of nitrogen oxides detected to the ozone generator.
3. system according to claim 2, it is characterised in that the injection structure of the ozone distributor, which is evenly distributed on, to be washed
Wash on the section of tower, so that the ozone that injection structure is ejected is sufficiently mixed with flue gas.
4. system according to claim 3, it is characterised in that the ozone distributor, by several ozone injection units
Docking composition, the injection unit is connected with the ozone distributor pipeline.
5. system according to claim 4, it is characterised in that the ozone distributor channel interior is passed through ozone gas,
The ozone distributor pipeline is provided with ozone inlet, to be connected with the ozone generator, and/or
It is connected and sealed after the two neighboring ozone injection unit docking by the way of welding, and/or
Lattice-shaped structure is formed after the ozone injection unit docking of the ozone distributor,
Preferably, the preferably circular or square lattice-shaped of the ozone distributor.
6. a kind of method of low temperature organic catalysis oxidizing and denitrating ozone, it is characterised in that methods described application Claims 1 to 5
The method of any one low temperature organic catalysis oxidizing and denitrating ozone, methods described includes step：
Step 1: the flue gas containing nitrogen oxides is sent into flue；
Step 2: the flue gas containing nitrogen oxides is after the enriching section of scrubbing tower, flue-gas temperature is down to less than 80 DEG C；
Step 3: after enriching section, the ozone of the flue gas containing nitrogen oxides and ozone distributor is sufficiently mixed, and makes nitrogen oxidation
With ozone oxidation reaction occurs for thing；
Step 4: the flue gas by ozone oxidation enters the absorber portion of scrubbing tower.
7. the method for low temperature organic catalysis oxidizing and denitrating ozone according to claim 6, it is characterised in that in step 4,
The absorber portion spray alkali lye or water of the scrubbing tower, make the nitrogen oxides after oxidation be dissolved into alkali lye or water；
Preferably, in step one, detected by the content to the nitrogen oxides in flue, detection signal is sent to control
Device, control device controls the size of ozone supply amount according to detection signal；
Preferably, in step 3, the identical direction that flows to of the ozone and flue gas is sprayed；
Preferably, in step 3, the ozone distributor is transversely mounted in scrubbing tower using gridiron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710657714.3A CN107308812A (en) | 2017-08-03 | 2017-08-03 | The system and method for low temperature organic catalysis oxidizing and denitrating ozone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710657714.3A CN107308812A (en) | 2017-08-03 | 2017-08-03 | The system and method for low temperature organic catalysis oxidizing and denitrating ozone |
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| CN107308812A true CN107308812A (en) | 2017-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710657714.3A Pending CN107308812A (en) | 2017-08-03 | 2017-08-03 | The system and method for low temperature organic catalysis oxidizing and denitrating ozone |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108905555A (en) * | 2018-07-12 | 2018-11-30 | 中国科学院过程工程研究所 | A kind of combined type flue ozone compartment system |
| CN109173662A (en) * | 2018-09-26 | 2019-01-11 | 中国科学院过程工程研究所 | The ozone distributor and its arrangement and purposes of a kind of subregion oxidation |
| CN110052142A (en) * | 2019-04-26 | 2019-07-26 | 北京航空航天大学 | A kind of device and method for shunting ozone oxidation collaboration and absorbing flue gas desulfurization and denitrification |
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| CN203507793U (en) * | 2013-11-06 | 2014-04-02 | 安徽同兴环保工程股份有限公司 | Device for simultaneously removing sulfur dioxide and nitrogen oxide from coke oven flue gas |
| CN105854554A (en) * | 2016-04-27 | 2016-08-17 | 刘国庆 | Ozone low-temperature oxidation denitration technology and system |
| CN206152600U (en) * | 2016-09-30 | 2017-05-10 | 北京长信太和节能科技有限公司 | Flue gas system distribution apparatus of high -efficient denitration of ozone in low temperature section absorption tower |
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2017
- 2017-08-03 CN CN201710657714.3A patent/CN107308812A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203507793U (en) * | 2013-11-06 | 2014-04-02 | 安徽同兴环保工程股份有限公司 | Device for simultaneously removing sulfur dioxide and nitrogen oxide from coke oven flue gas |
| CN105854554A (en) * | 2016-04-27 | 2016-08-17 | 刘国庆 | Ozone low-temperature oxidation denitration technology and system |
| CN206152600U (en) * | 2016-09-30 | 2017-05-10 | 北京长信太和节能科技有限公司 | Flue gas system distribution apparatus of high -efficient denitration of ozone in low temperature section absorption tower |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108905555A (en) * | 2018-07-12 | 2018-11-30 | 中国科学院过程工程研究所 | A kind of combined type flue ozone compartment system |
| CN109173662A (en) * | 2018-09-26 | 2019-01-11 | 中国科学院过程工程研究所 | The ozone distributor and its arrangement and purposes of a kind of subregion oxidation |
| CN110052142A (en) * | 2019-04-26 | 2019-07-26 | 北京航空航天大学 | A kind of device and method for shunting ozone oxidation collaboration and absorbing flue gas desulfurization and denitrification |
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Application publication date: 20171103 |