CN207042222U - Chlorine dioxide gaseous oxidation denitration integrated device - Google Patents
Chlorine dioxide gaseous oxidation denitration integrated device Download PDFInfo
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- CN207042222U CN207042222U CN201720465945.XU CN201720465945U CN207042222U CN 207042222 U CN207042222 U CN 207042222U CN 201720465945 U CN201720465945 U CN 201720465945U CN 207042222 U CN207042222 U CN 207042222U
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- chlorine dioxide
- denitration
- tower body
- liquid material
- material pond
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Abstract
The utility model discloses a kind of chlorine dioxide gaseous oxidation denitration integrated device, including two-stage type tower body, the bottom in tower body is provided with liquid material pond, and the tower body side wall above liquid material pond is provided with gas approach；Desulfuration spraying tube, chlorine dioxide gasification injection spray pipe are interval with above gas approach successively, tower body inner chamber is separated into the dividing plate that upper and lower two-part inclined angle is set；Chlorine dioxide gasification injection spray pipe is connected with chlorine dioxide preparation apparatus, described denitration shower, desulfuration spraying tube are connected with liquid material pond respectively, described liquid material bottom of pond portion is provided with feed liquid discharge pipe, the feed liquid discharge pipe is connected with crystallization tank, and crystallization tank is connected by slurry return duct with gas approach.Device described in the utility model can use chlorine dioxide gas phase efficient oxidation NO, while the SO in absorbing and removing flue gas2And NOXAnd the harmful substance such as dust, mercury；The advantages that simple and direct with technique, equipment investment is few, and operating cost is low, easy to operate.
Description
Technical field
The utility model is related to a kind of flue gas desulfurization and denitrification device, more particularly to it is a kind of based on chlorine dioxide gaseous oxidation and
Alkali lye (calcium base, ammonium, sodium base) absorbs removes SO in flue gas simultaneously2And NOXWet method integration desulfurization denitration device.
Background technology
At present, chemical oxidation wet desulphurization denitrification integral process includes vapour phase oxidation process and liquid oxidatively method.NO indissolubles
Yu Shui, liquid phase oxidation is the dissolving reactive absorption process of gas-film controlled, slow to NO liquid-phase oxidation process reactive absorption speed,
Removal efficiency is low.And mass transfer obstacle is not present in vapour phase oxidation process, NO oxidizing process can reach rapidly and efficiently.So using gas phase
Method for oxidation will have higher removal efficiency and more preferable economic effect.It is more satisfactory, it can apply to the chemistry of vapour phase oxidation process
Oxidant mainly has ozone, chlorine dioxide, chlorine.Ozone is strong to NO oxidisability, and reaction speed is fast, efficiency high
(a kind of flue gas desulfurization and denitration methods of CN10237111013.), but ozone generation system equipment investment is big, and operation energy consumption is high, big
Apply and have any problem in type smoke processing system.Chlorine oxidation performance is weaker, not high to NO oxidation removal rate (typically to can only achieve
50% or so).The oxidisability of chlorine dioxide is suitable with ozone, fast to NO oxidation reaction speed, and removal efficiency is high, scene supply two
The plant investment of chlorine monoxid is small, and operation running and comparing is simple.So the technique of chlorine dioxide gaseous oxidation at present is considered as low temperature
It is maximally effective in wet oxidation-desulfurizing denitrification integral process, the most technique of actual promotional value.
Chlorine dioxide (ClO2) the gas concentration danger that has blast more than 10%.ClO2Can not be as Cl2Equally it is compressed into liquid
State is stored in steel cylinder, and its field application can only be prepared at the scene.Relevant Chlorine Dioxide Oxidation desulphurization denitration is integral both at home and abroad at present
The research of chemical industry skill is all using chlorine dioxide low concentration solution spray oxidative absorption mode or uses chlorine dioxide predecessor
Spray, oxidative absorption mode is completed through chemical reaction generation chlorine dioxide.
Absorbed as Patent No. CN201410485392.5 is related to a kind of three sections of tower three-levels spraying liquid phase oxidation desulphurization denitration
Technique and device, oxidant NaClO2Alkaline aqueous solution, oxidant stand alone as a circulating spraying system, Integral tower stage casing
For oxidation panel, NaClO2After NO has been dissolved in tower oxidation reaction generation NO occurs for solution2, NO2Hydrolysis generates nitric acid, nitre
Acid decomposes NaClO2Generate ClO2.So this NaClO2To the ClO of NO oxidizing process2From (thing early stage) NaClO2.This
It is a liquid phase oxidation reaction process, it is slow to NO oxidizing process.Technique denitration rate typically can only achieve 50%-70%.
As Patent No. CN104028103A. is related to a kind of boiler smoke ClO 2 catalyzed oxidation simultaneous SO_2 and NO removal side
Method.Chlorine Dioxide Oxidation agent be by chlorine dioxide preparation apparatus generation concentration be 0.0015~0.015mol/L (100~
Aqueous solution of chlorine dioxide 1000mmg/L), oxidation NO is sprayed in tower with the solution, because of ClO2Solution concentration is low, sprays process
It has been only possible to a small amount of ClO2Gasification, be substantially carried out or ClO2Liquid phase oxidation absorbing reaction process of the solution to NO, the patent exist
The carrier for being loaded with catalyst is filled with absorption tower, enhances oxidant ClO2To NO oxidation.Improve technique
Denitration efficiency, but filling carrier adds tower body product and equipment investment in tower, adds the difficulty of process implementing.
In a word, chlorine dioxide liquid phase oxidation NO techniques, except NO is insoluble in water, oxidation rate and oxidation efficiency are made by serious
Influence, in liquid phase ClO2Oxidation to NO is also by SO2The strong competition of oxidation, will increase ClO2The consumption of oxidant.
The content of the invention
In order to solve the shortcomings of the prior art, the utility model provides a kind of chlorine dioxide gaseous oxidation desulfurization and taken off
Nitre integrated apparatus.
Based on above-mentioned purpose, the utility model uses following technical scheme：
A kind of chlorine dioxide gaseous oxidation denitration integrated device, its main body are oxidative absorption tower, and the oxidation is inhaled
Receiving tower includes two-stage type tower body, and the bottom in tower body is provided with liquid material pond, and the tower body side wall above liquid material pond is entered provided with flue gas
Mouthful；Desulfuration spraying tube is provided with above gas approach, chlorine dioxide gasification injection spray pipe, chlorine dioxide are provided with above desulfuration spraying tube
Change the dividing plate for being provided with above injection spray pipe and tower body inner chamber being separated into upper and lower two-part inclined angle and set, wherein, lower part
For desulfurization and NO gaseous oxidation tower sections, top is divided into denitrating tower section；Denitration shower is provided with above dividing plate；It is low positioned at dividing plate
Tower body side wall at position is provided with denitration liquid return duct；The top of tower body is provided with demister, water inlet flush pipe and exhanst gas outlet；Institute
The chlorine dioxide gasification injection spray pipe stated is connected with chlorine dioxide preparation apparatus, described denitration shower, desulfuration spraying tube difference
It is connected with liquid material pond, described liquid material bottom of pond portion is provided with feed liquid discharge pipe, and the feed liquid discharge pipe is connected with crystallization tank, crystallization tank
It is connected by slurry return duct with gas approach, described alkali lye preparation system is sprayed with desulfurization respectively by caustic make up pump
Shower pipe, denitration shower and the connection of feed liquid discharge pipe.
Compared with prior art, the utility model has the following advantages that：
(1) described device can use chlorine dioxide gas phase efficient oxidation NO, while the SO in absorbing and removing flue gas2And NOX
And the harmful substance such as dust, mercury.
(2) the advantages that described device has technique simple and direct, and equipment investment is few, and operating cost is low, easy to operate, suitable for each
The combined desulfurization and denitration of kind fuel furnace flue gas, need to particularly carry out denitrating technique transformation to existing wet desulphurization device, implement
It is more easy.
Brief description of the drawings
Fig. 1 is chlorine dioxide gaseous oxidation denitration integrated device schematic diagram described in the utility model；
Wherein, 1 gas approach；2 oxidative absorption towers；3 dividing plates；4 denitration liquid return ducts；5 tower reactor agitators；6 feed liquids are discharged
Pipe；7 liquid material ponds；8 denitration liquid circulating pumps；9 doctor solution circulating pumps；10 desulfuration spraying tubes；11 chlorine dioxide spraying vapor lamp；12 is de-
Nitre shower；13 demisters；14 exhaust openings；15 water inlet flush pipes；16 chlorine dioxide preparation apparatus；17 alkali lye preparation facilities；18
Caustic make up pump；19 crystallization tanks；20 slurry reflux pumps；21 slurry return ducts.
Embodiment
Such as Fig. 1, chlorine dioxide gaseous oxidation denitration integrated device described in the utility model, its main body is oxidation
Absorption tower 2, the main body include two-stage type tower body, and the bottom in tower body is provided with liquid material pond 7, the tower body above liquid material pond 7
Side wall is provided with gas approach 1；Desulfuration spraying tube 10 is provided with above gas approach 1, the top of desulfuration spraying tube 10 is provided with titanium dioxide
Chlorine injection spray pipe 11；Chlorine dioxide gasification injection spray pipe 11 above provided with by tower body inner chamber be separated into it is upper and lower it is two-part every
Plate 3, its underpart are desulfurization and NO gaseous oxidation tower sections, and its top is denitration tower section；Denitration shower is provided with above dividing plate 3
12；The 3 inclined angle of dividing plate is set, and the tower body side wall at the low level of dividing plate 3 is provided with denitration liquid return duct 4；Tower body
Top be provided with demister 13, flush pipe 15 of intaking and exhanst gas outlet 14.Described chlorine dioxide gasification injection spray pipe 11 and dioxy
Change chlorine preparation facilities 16 to connect, described denitration shower 12, desulfuration spraying tube 10 are connected with liquid material pond 7 respectively, described liquid
The bottom of material pond 7 is connected provided with feed liquid discharge pipe 6 with crystallization tank 19, and crystallization tank 19 is entered by slurry return duct 21 with flue gas
Mouth 1 is connected, and described alkali lye preparation system 17 is sprayed with desulfuration spraying tube 10, denitration respectively by caustic make up pump 18 and pipe
Pipe 12 and feed liquid discharge pipe 6 connect.
In a preferred embodiment of the present utility model, the dividing plate 3 is set in 5-10 degree angle of inclination, on dividing plate 3
Pipe cap formula blow vent provided with multiple a diameter of 80-160mm, the setting of dividing plate are to avoid denitration spray liquid to chlorine dioxide gas phase
Aoxidize the interference of NO operations.
In a preferred embodiment of the present utility model, the gaseous oxidation to NO is implemented in ClO 2 solution spraying gasification
Operation is the upper and lower section of completion in same tower level with spray desulfurization operations, is existed compared to using Low Concentration Chlorine Dioxide solution
Isolated oxidation tower section simplifies tower structure to NO oxidation operation.
In a preferred embodiment of the present utility model, chlorine dioxide preparation apparatus 16 includes ClO 2 solution
Device, the raw material metering of ClO 2 solution preparation process, conveying device, the control device and ClO 2 solution of preparation process
Deliver, spraying gasification installation.The ClO 2 solution delivered directly exports highly concentrated for reactor (0.3~0.7MPa) with pressure
(1~60,000 mg/L) reaction solution is spent, Direct spraying is gasificated into chlorine dioxide, the spray of high concentration of chlorine dioxide solution in tower
Fog rate is more than 98%, and the residual solution after spraying gasification is without independently collecting, without circulation.Compared to using low concentration (100~
1000mg/L) its gasification efficiency of spraying of ClO 2 solution wants high tens times to hundred times, not only efficiently and rapidly completes to NO
Oxidation, and reduce the ClO 2 solution cyclic absorption equipment in conventional chlorine dioxide preparation apparatus and oxidative absorption tower
Reduce an oxidation solution circulation section.
In a preferred embodiment of the present utility model, feed liquid discharge pipe 6, desulfuration spraying tube 10 and denitration shower
PH sensors are set respectively in 12, alkali flow are added by pH On-line Control caustic make up pump, realization controls each process duct respectively
The pH value of solution.
In a preferred embodiment of the present utility model, desulfuration spraying tube 10 passes through doctor solution circulating pump 9 and liquid material pond 7
Connection.
In a preferred embodiment of the present utility model, denitration shower 12 passes through denitration liquid circulating pump 8 and liquid material pond 7
Connection.
In a preferred embodiment of the present utility model, crystallization tank 19 passes through slurry reflux pump 20 and slurry
Return duct 21 connects.
In a preferred embodiment of the present utility model, desulfurization absorbing liquid and denitration absorbing liquor using it is same (calcium base,
Sodium base, ammonium) alkaline matter absorbing liquid, share same recyclable liquid material pond 7, pass through the He of denitration liquid circulating pump 8 respectively
Doctor solution circulating pump 9 is inputted to spraying in tower, in desulfurization and NO gaseous oxidations through desulfuration spraying tube 10 and denitration shower 12
Desulfurization is carried out in tower section, denitration is carried out in denitration tower section；Absorbing liquid after denitration flows through denitration liquid backflow after the collection of dividing plate 3
Pipe 4 is back to liquid material pond 7.Using same absorbing liquid and same liquid material pond using the sulphite in sweetening process generation
The NO absorbed with denitrification process2Between redox property, complete absorb NO2Simultaneously by sulfite oxidation into sulfate
Technique needs, and saves the oxidant cost that sulfite oxidation operation needs.
In a preferred embodiment of the present utility model, the absorbing liquid in liquid material pond 7 is made in absorption slurry reflux pump 20
Under, the absorbing liquid is continuously delivered to crystallization tank 19 from liquid material pond 7 through feed liquid discharge pipe 6, the crystallized crystallisation by cooling of groove 19,
After slurries supplement part water dilution after crystallization, conveyed by absorption slurry reflux pump 20, then by absorbing slurry reflux pipe 21,
Gas approach 1 sprays to entering tower flue gas, is then back to liquid material pond 7.This cyclic process main function is control absorbing liquid
Concentration avoids generating crystallization in tower, influences spray-absorption operation.
Integrated apparatus described in the utility model can realize following techniques：
(1) by alkali lye (calcium base, ammonium, sodium base) preparation facilities 17, alkali lye is prepared, from water inlet flush pipe 15 to the liquid of tower reactor
The moisturizing of material pond 7, the pH value adjusted in liquid material pond 7 reach operational control condition.(2) run denitration liquid circulating pump 8 and doctor solution follows
Ring pump 9 and slurry reflux pump 20.(3) flue gas enters absorption tower by gas approach 1, and flue gas is through desulfurization and NO gaseous oxidation towers
After the desulfuration spraying tube 10 of section sprays, temperature control is at 40 DEG C -80 DEG C.(4) chlorine dioxide preparation apparatus 16 is run, by flue gas stream
Amount and flue gas contain NOXConcentration estimation chlorine dioxide needs quantity delivered, adjusts the yield of chlorine dioxide preparation apparatus 16, and in chlorine dioxide
ClO 2 solution is directly delivered under the chlorine dioxide generator reaction pressure of preparation facilities 16 and enters tower spraying gasification.(5) foundation
NO after gas cleaningXContent adjusts the contribution of chlorine dioxide.(6) according to desulfurization absorbing liquid pH value regulation supplement alkali lye amount.
(7) according to denitration absorbing liquor pH value regulation supplement alkali lye amount.(8) according to crystallization treatment slurry pH value regulation supplement alkali lye amount.
(9) the Liquid level supplement inflow according to liquid material pond 7.(10) according to SO in detection discharge flue gas2Content and zoneofoxidation flue gas
The spray liquid measure of temperature adjustment desulfuration spraying tube 10.(11) according to NO in detection discharge flue gasXContent regulation denitration shower 12
Spray liquid measure.Operation control fume emission reaches discharge standard in this way.
Claims (7)
1. a kind of chlorine dioxide gaseous oxidation denitration integrated device, it is characterised in that its main body is oxidative absorption tower
（2）, including two-stage type tower body, the bottom in tower body is provided with liquid material pond（7）, positioned at liquid material pond（7）The tower body side wall of top is provided with
Gas approach（1）；Gas approach（1）Top is arranged at intervals desulfuration spraying tube successively（10）, chlorine dioxide gasification injection spray pipe（11）、
Dividing plate (3), the inclined angle of dividing plate (3) are set, and tower body inner chamber is separated into upper and lower two parts, wherein, bottom is divided into
Desulfurization and NO gaseous oxidation tower sections, top are divided into denitrating tower section；Denitration shower (12) is provided with above dividing plate (3)；Positioned at dividing plate
(3) the tower body side wall at low level is provided with denitration liquid return duct (4)；The top of tower body is provided with demister (13), water inlet flush pipe
And exhanst gas outlet (14) (15)；Described chlorine dioxide gasification injection spray pipe (11) is connected with chlorine dioxide preparation apparatus (16), institute
Denitration shower (12), the desulfuration spraying tube (10) stated are connected with liquid material pond (7) respectively, and described liquid material pond (7) bottom is provided with
Feed liquid discharge pipe (6), the feed liquid discharge pipe (6) are connected with crystallization tank (19), and crystallization tank (19) passes through slurry return duct
(21) be connected with gas approach (1), alkali lye preparation system (17) respectively with desulfuration spraying tube (10), denitration shower (12) and
Feed liquid discharge pipe (6) connects.
2. device as claimed in claim 1, it is characterised in that the dividing plate（3）Set in 5-10 degree angle of inclination, dividing plate
（3）It is provided with multiple a diameter of 80-100mm pipe cap formula blow vent.
3. device as claimed in claim 1, it is characterised in that described alkali lye preparation system (17) passes through caustic make up pump
(18) it is connected respectively with desulfuration spraying tube (10), denitration shower (12) and feed liquid discharge pipe (6).
4. device as claimed in claim 1, it is characterised in that desulfuration spraying tube（10）Pass through doctor solution circulating pump（9）With liquid
Material pond（7）Connection.
5. device as claimed in claim 1, it is characterised in that denitration shower（12）Pass through denitration liquid circulating pump（8）With liquid
Material pond（7）Connection.
6. device as claimed in claim 1, it is characterised in that crystallization tank（19）Pass through slurry reflux pump（20）With crystallization
Slurry reflux pipe（21）Connection.
7. device as claimed in claim 1, it is characterised in that feed liquid discharge pipe（6）, desulfuration spraying tube（10）Sprayed with denitration
Pipe（12）PH sensors are inside set respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720465945.XU CN207042222U (en) | 2017-04-28 | 2017-04-28 | Chlorine dioxide gaseous oxidation denitration integrated device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720465945.XU CN207042222U (en) | 2017-04-28 | 2017-04-28 | Chlorine dioxide gaseous oxidation denitration integrated device |
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| Publication Number | Publication Date |
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| CN207042222U true CN207042222U (en) | 2018-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720465945.XU Expired - Fee Related CN207042222U (en) | 2017-04-28 | 2017-04-28 | Chlorine dioxide gaseous oxidation denitration integrated device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106975337A (en) * | 2017-04-28 | 2017-07-25 | 包训祥 | Chlorine dioxide gaseous oxidation denitration integrated device and its technique |
| CN109126457A (en) * | 2018-09-07 | 2019-01-04 | 南通航泰船舶机械有限公司 | A kind of marine internal combustion engine tail gas desulfurization method of denitration |
| CN110038409A (en) * | 2019-04-30 | 2019-07-23 | 无锡市道格环保科技有限公司 | A kind of combined desulfurization and denitration device and technique |
| CN111228993A (en) * | 2020-03-11 | 2020-06-05 | 山东师范大学 | Method and system for flue gas denitration by using chlorine dioxide and spray tower |
| CN112403238A (en) * | 2020-11-02 | 2021-02-26 | 攀枝花市蓝鼎环保科技有限公司 | A SOx/NOx control device for high sulfur concentration flue gas |
| CN113457410A (en) * | 2021-07-30 | 2021-10-01 | 郑州轻工业大学 | Method and device for desulfurizing, removing mercury and decarbonizing flue gas of lead-zinc smelting volatilization kiln |
| CN114053858A (en) * | 2020-08-06 | 2022-02-18 | 超力生化股份有限公司 | NOx-containing exhaust gas treatment system and method of operating the same |
-
2017
- 2017-04-28 CN CN201720465945.XU patent/CN207042222U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106975337A (en) * | 2017-04-28 | 2017-07-25 | 包训祥 | Chlorine dioxide gaseous oxidation denitration integrated device and its technique |
| CN109126457A (en) * | 2018-09-07 | 2019-01-04 | 南通航泰船舶机械有限公司 | A kind of marine internal combustion engine tail gas desulfurization method of denitration |
| CN110038409A (en) * | 2019-04-30 | 2019-07-23 | 无锡市道格环保科技有限公司 | A kind of combined desulfurization and denitration device and technique |
| CN110038409B (en) * | 2019-04-30 | 2021-06-01 | 无锡市道格环保科技有限公司 | Combined desulfurization and denitrification device and process |
| CN111228993A (en) * | 2020-03-11 | 2020-06-05 | 山东师范大学 | Method and system for flue gas denitration by using chlorine dioxide and spray tower |
| CN114053858A (en) * | 2020-08-06 | 2022-02-18 | 超力生化股份有限公司 | NOx-containing exhaust gas treatment system and method of operating the same |
| CN114053858B (en) * | 2020-08-06 | 2024-06-04 | 超力生化股份有限公司 | Method for operating an exhaust gas treatment system containing nitrogen oxides |
| CN112403238A (en) * | 2020-11-02 | 2021-02-26 | 攀枝花市蓝鼎环保科技有限公司 | A SOx/NOx control device for high sulfur concentration flue gas |
| CN112403238B (en) * | 2020-11-02 | 2022-11-29 | 攀枝花市蓝鼎环保科技有限公司 | A SOx/NOx control device for high sulfur concentration flue gas |
| CN113457410A (en) * | 2021-07-30 | 2021-10-01 | 郑州轻工业大学 | Method and device for desulfurizing, removing mercury and decarbonizing flue gas of lead-zinc smelting volatilization kiln |
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Granted publication date: 20180227 Termination date: 20200428 |