CN206334520U - Odor at low temperature denitrification apparatus for hot-water boiler - Google Patents
Odor at low temperature denitrification apparatus for hot-water boiler Download PDFInfo
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- CN206334520U CN206334520U CN201621420179.7U CN201621420179U CN206334520U CN 206334520 U CN206334520 U CN 206334520U CN 201621420179 U CN201621420179 U CN 201621420179U CN 206334520 U CN206334520 U CN 206334520U
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- flue gas
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Abstract
The utility model discloses a kind of odor at low temperature denitrification apparatus for hot-water boiler, it includes the flue gas guiding device that flue gas is exported from boiler, absorption tower for carrying out denitration process to boiler smoke, absorption tower is connected with absorption liquid supply unit and absorbing liquid recycling device simultaneously, absorption tower is provided with flue gas input port and flue gas delivery outlet simultaneously, water dust scrubber and pipe-line mixer are disposed between the flue gas input port on flue gas guiding device and the absorption tower, the ozone output channel of ozone generator is connected in connecting pipe between water dust scrubber and pipe-line mixer.Using NO water insoluble in flue gas to be oxidized to high-valence state nitrogen oxides soluble in water.Make alkaline process absorption through absorption tower again, by the SO in flue gas2Absorbed simultaneously with oxidized NOx, it is ensured that NO in flue gasXConcentration of emission≤200mg/Nm3, and absorbing liquid finally can together be enriched with, concentrate, removing water recycling after drying.
Description
Technical field
The utility model is related to a kind of denitrification apparatus, specifically, is related to a kind of flue gas for being used to produce hot-water boiler
The device of denitration process is carried out under low-temperature condition.
Background technology
The denitration technology of current flue gas can be divided into the major class of dry and wet two, the most frequently used Dry denitration again with selectivity
Catalysis reduction (SCR) and SNCR (SNCR) technology is most widely used (account for denitrating flue gas market 60%), category
In technology most ripe denitration technology, its principle is to spray ammonia or urea etc. into flue gas to containThe reducing agent of free radical,
Redox reaction occurs for the NOx under high temperature in direct (or under collaboration of catalyst) and flue gas, NOx be reduced into nitrogen and
Water.But the technology also has its huge limitation, due to chemical reaction need to carry out at high temperature, and for medium small boiler with
And for Industrial Boiler, exhaust gas temperature does not reach row far from the high temperature required for reaching chemical reaction, the denitration process of flue gas
The standard put.Therefore odor at low temperature denitration technology just possesses significant market.
Utility model content
The purpose of this utility model is to provide a kind of odor at low temperature denitrification apparatus for hot-water boiler, can be with low temperature shape
Denitration process is carried out under state, to reach discharge standard.
Odor at low temperature denitrification apparatus in the utility model for hot-water boiler includes the flue gas that flue gas is exported from boiler
Guiding device, the absorption tower for carrying out denitration process to boiler smoke, the absorption tower are connected with absorbing liquid supply dress simultaneously
Put with absorbing liquid recycling device, the absorption tower is provided with flue gas input port and flue gas delivery outlet simultaneously, in the cigarette
Water dust scrubber and pipe-line mixer are disposed between gas guiding device and the flue gas input port on the absorption tower, in moisture film
The ozone output channel of ozone generator is connected in connecting pipe between deduster and pipe-line mixer.
The ozone output channel is through the connecting pipe between distribution device and the water dust scrubber and pipe-line mixer
Connection.
The ozone generator includes in the ozone generator tank body and switch board being placed in parallel, the ozone generator
Tank body is a closed oval tank body, is provided with the top of tank body into raw material gas port and cooling water inlet, in the tank body
Bottom be provided with ozone outlet and coolant outlet, with it is described enter the admission line that is connected of raw material gas port in be provided with before mistake
Filter and drier, after-filter and fine filter are connected with the output channel being connected with the ozone outlet.
Enter the air inlet pipe that is connected of raw material gas port and with the output channel that the ozone outlet is connected to each extend to institute with described
State the side of switch board.
The ozone generator tank body and switch board are installed in as on earthy I-shaped steelframe.
Odor at low temperature denitrification apparatus in the utility model utilizes ozone prepared by ozone generator, passes through distribution device handle
Ozone gas uniformly arrives flue section, enters pipe-line mixer simultaneously with the boiler smoke after water dust scrubber dedusting
In, ozone is sufficiently mixed with flue gas and is occurred oxidation reaction, NO water insoluble in flue gas is oxidized to height soluble in water
Valence state nitrogen oxides.Then flue gas makees alkaline process absorption into absorption tower, and alkaline solution is by the SO in flue gas2With oxidized NOx
Absorb simultaneously, it is ensured that NO in flue gasXConcentration of emission≤200mg/Nm3, qualified discharge is carried out subsequently into chimney.And absorbing liquid is most
After can be enriched with together, concentrate, remove water dry after recycle.
Brief description of the drawings
Fig. 1 is the FB(flow block) of odor at low temperature denitrification apparatus in the utility model.
Fig. 2 is the schematic front view of foul smell generator in the utility model.
Fig. 3 is the schematic side view of foul smell generator in the utility model.
Fig. 4 is the schematic top plan view of foul smell generator in the utility model.
Embodiment
The specific embodiment of the utility model is elaborated below in conjunction with accompanying drawing.
Odor at low temperature denitrification apparatus in the utility model for hot-water boiler is that change is original to be carried out at denitration to flue gas
The mode of ammonia or urea is directly sprayed into during reason in flue gas, but flue gas is exported, the temperature for not recycling flue gas to possess in itself
Degree, realization is handled flue gas under low-temperature condition.
Led as shown in figure 1, the odor at low temperature denitrification apparatus in the utility model includes the flue gas for exporting flue gas from boiler
Go out device, the absorption tower 1 for carrying out denitration process to boiler smoke, the top connection on absorption tower 1 absorbs liquid supply unit
2nd, bottom connection absorbing liquid recycling device 3, absorption tower 1 is provided with flue gas input port and flue gas delivery outlet simultaneously, works as cigarette
Gas is entered behind the inside of absorption tower 1 from flue gas input port, from absorbing in liquid supply unit 2 into the absorbing liquid inside absorption tower 1
In the way of spray and smoke contacts, that is, utilize Ca (OH)2, the alkali liquor absorption liquid such as NaOH, by the SO in flue gas2Inhaled simultaneously with NOx
Receive, realize denitration process.Flue gas directly makees emission treatment from flue gas delivery outlet after denitration process.Because absorption tower 1 is produced for denitration
The mature equipment of industry, is not described in detail to its concrete structure.
Set between the flue gas input port on flue gas guiding device and absorption tower 1 and be disposed with water dust scrubber (in figure
It is not shown) and pipe-line mixer 4, derived flue gas enters pipeline mixing after water dust scrubber dedusting in flue gas guiding device
Device 4.The ozone efferent duct of ozone generator 5 is connected with the middle of connecting pipe between water dust scrubber and pipe-line mixer 4
Road, one end connection ozone generator 5 of ozone output channel, the other end connects water dust scrubber by distribution device and mixed with pipeline
The ozone gas produced in ozone generator 5, is uniformly arrived flue section, entered together with flue gas by the pipeline between clutch 4
Enter to pipe-line mixer 4, boiler smoke is entered in the ozone mixed reactor simultaneously.
As shown in Figure 2, Figure 3 and Figure 4, in order to coordinate the odor at low temperature denitrification apparatus in the utility model, the utility model
Middle to provide a kind of ozone generator 5 reasonable, simple in construction with space, it is in what is be placed in parallel that the ozone generator 5, which includes,
Ozone generator tank body 6 and switch board 7, ozone generator tank body 6 and switch board 7 are fixedly mounted on as earthy I-shaped
On shaped steel frame 16.Ozone generator tank body 6 is a closed oval tank body, is provided with the top of tank body into raw material gas port 8
With coolant outlet 9, the bottom of tank body is provided with ozone outlet 10 and cooling water inlet 11, is connected with entering raw material gas port 8
Admission line in front filter 12 and drier 13 are installed, be connected with after-filter on the output channel of ozone outlet 10
14 and fine filter 15.For reasonable layout and the utility model confined space, the connecting leg road of raw material gas port 8 is entered with ozone generator 5
The side of switch board 7 is each extended to the pipeline being connected with ozone outlet 10.
Ozone generator 5 in the utility model utilizes electrion principle, i.e., High Level AC Voltage is added in into centre and be separated with
Insulator simultaneously has on the high-field electrode of certain interval, allow by dry decontamination air or oxygen pass through.When High Level AC Voltage reaches
During to 10-15KV, the free high energy ionic dissociation O in blue-glow electric discharge [corona], corona is produced2Molecule, polymerize through collision
For O3Molecule, converts the oxygen to ozone.
The operation principle of odor at low temperature denitrification apparatus in the utility model for hot-water boiler is low-temperature oxidation technique
(LoTOx) it is the most easy and effective, it is NO (accounting for 95%) because the nitrogen oxides in flue gas is mainly constituted, NO is insoluble in water, and high
The NO of valence state2、N2O5Etc. water-soluble generation HNO2And HNO3, solvability greatly improves, it is easy to the hand such as spray by alkali lye
Section deviates from it from flue gas.NO in flue gas is converted into high-valence state, stronger oxidant need to be introduced, in numerous oxidants
In, ozone is the strong oxidizer of most environment-protecting clean, does not leave any secondary pollution during Efficient Conversion NO to high-valence state
Thing, in addition O3Life cycle it is relatively long, O will be produced after a small amount of oxygen or air ionization3, it is then fed into flue gas, can be notable
Reduce energy consumption.More specifically principle is as follows：
The utility model has the strong oxidizing property for being only second to fluorine using ozone, has the ability flue gas completely in adverse circumstances
NO be oxidized to high-valence state, the water solubility of nitrogen oxides in effluent is improved, so as to pass through the wet elution sprayed in absorption tower 1.
Wherein mainly include following reaction：
NO+O3→NO2+O2
NO2+O3→NO3+O2
NO2+NO2→N2O4
N2O4+O3→N2O5
NO3+NO2→N2O5
3NO2+H2O→2HNO3+NO
N2O5+H2O→2HNO3
NO is oxidized to after the nitrogen oxides of high-valence state using ozone, it is necessary to further absorb generation salt, finally
By washing outside cleaning discharge system.It is Ca (OH) that the utility model, which absorbs the absorbing liquid used in liquid supply unit 2,2、NaOH
Deng alkali lye, specific reaction equation is as follows after being entered by spray mode in absorption tower 1：
2HNO3+Ca(OH)2→Ca(NO3)2+2H2O
HNO3+NaOH→NaNO3+H2O
Complete denitration.
In summary, it is following excellent using having after the odor at low temperature denitrification apparatus for hot-water boiler in the utility model
Point：
1st, it can obtain higher NOXRemoval efficiency, typical removing scope is 70%~90%, even up to 95%, and
And can be in different NOXConcentration and NO, NO2Ratio under keep high efficiency.
2nd, because not with NOXThe O of reaction3It can be removed in the washer on absorption tower, so in the absence of O3What is leaked asks
Topic.
3rd, SO is contained in flue gas2With CO presence, NO is not influenceedXRemoval, and ozone denitration nor affects on other pollutants
Control technology.
4th, environmental protection increasingly strict requirements are more adapted to than traditional flue gas desulfurization and denitration technique, and equipment investment is low, take up an area
Area is small, simple system the advantages of.
5th, other oxidising agents are substituted with ozone, denitration reaction process is controlled by special process, alkali liquor absorption is reacted
Product exist in solid form, realize the curing process of gaseous contaminant (nitrogen oxides), do not produce secondary pollution.
6th, using the high-level oxidation technology of ozone not only to NOXWith good removal effect, and to its in flue gas
His noxious pollutant, such as heavy metal Hg also has certain removal ability.
7th, the denitrification process such as oxidative absorption are carried out at low temperature, are conducive to the energy recovery of boiler to utilize, and reduction engineering is applied
Work difficulty.Using domestic existing more ripe wet desulfurizing process and improved, desulphurization denitration is carried out simultaneously.
8th, the device in the utility model is used in oil refinery after the waste gas pollution control and treatment of heater, boiler etc., can made
NOx emission is reduced to below 10 μ g/g, meets most stringent of emission reduction requirement.And SO will not be made2It is converted into SO3, in addition, flue gas
In particulate matter and sulfide to ozone-depleting or NOXThe influence of removal efficiency is not obvious, and the system not only can efficiently be gone
Denitrification, and also have obvious removal effect to particulate matters such as sulfur dioxide and dust.Blocking, ammonia is not present in it simultaneously
The problems such as leakage.
Claims (5)
1. a kind of odor at low temperature denitrification apparatus for hot-water boiler, include from boiler export flue gas flue gas guiding device,
Absorption tower for carrying out denitration process to boiler smoke, the absorption tower is connected with absorption liquid supply unit and absorbing liquid simultaneously
Recycling device, the absorption tower is provided with flue gas input port and flue gas delivery outlet simultaneously, it is characterised in that in the cigarette
Water dust scrubber and pipe-line mixer are disposed between gas guiding device and the flue gas input port on the absorption tower, in moisture film
The ozone output channel of ozone generator is connected in connecting pipe between deduster and pipe-line mixer.
2. the odor at low temperature denitrification apparatus according to claim 1 for hot-water boiler, it is characterised in that the ozone is defeated
Go out pipeline to connect through the connecting pipe between distribution device and the water dust scrubber and pipe-line mixer.
3. the odor at low temperature denitrification apparatus according to claim 1 for hot-water boiler, it is characterised in that the ozone hair
Raw device includes in the ozone generator tank body and switch board being placed in parallel, and the ozone generator tank body is a closed ellipse
Shape tank body, is provided with the top of tank body into raw material gas port and cooling water inlet, and the bottom of the tank body, which is provided with ozone, to be gone out
Mouthful and coolant outlet, with it is described enter the admission line that is connected of raw material gas port in front filter and drier are installed, with
After-filter and fine filter are connected with the output channel of the ozone outlet connection.
4. the odor at low temperature denitrification apparatus according to claim 3 for hot-water boiler, it is characterised in that with it is described enter original
The air inlet pipe of material gas port connection and the side that the switch board is each extended to the output channel that the ozone outlet is connected.
5. the odor at low temperature denitrification apparatus according to claim 3 for hot-water boiler, it is characterised in that the ozone hair
Raw device tank body and switch board are installed in as on earthy I-shaped steelframe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621420179.7U CN206334520U (en) | 2016-12-22 | 2016-12-22 | Odor at low temperature denitrification apparatus for hot-water boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621420179.7U CN206334520U (en) | 2016-12-22 | 2016-12-22 | Odor at low temperature denitrification apparatus for hot-water boiler |
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| Publication Number | Publication Date |
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| CN206334520U true CN206334520U (en) | 2017-07-18 |
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| CN201621420179.7U Active CN206334520U (en) | 2016-12-22 | 2016-12-22 | Odor at low temperature denitrification apparatus for hot-water boiler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110394044A (en) * | 2019-08-04 | 2019-11-01 | 广州格邦机械工程有限公司 | Low-temperature flue gas ozone denitrating system |
| CN111995213A (en) * | 2020-07-16 | 2020-11-27 | 株洲时代新材料科技股份有限公司 | Sludge treatment process |
-
2016
- 2016-12-22 CN CN201621420179.7U patent/CN206334520U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110394044A (en) * | 2019-08-04 | 2019-11-01 | 广州格邦机械工程有限公司 | Low-temperature flue gas ozone denitrating system |
| CN111995213A (en) * | 2020-07-16 | 2020-11-27 | 株洲时代新材料科技股份有限公司 | Sludge treatment process |
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