CN205461764U - Novel little spray gun SNCR+ ozone flue gas denitration device - Google Patents
Novel little spray gun SNCR+ ozone flue gas denitration device Download PDFInfo
- Publication number
- CN205461764U CN205461764U CN201620126118.3U CN201620126118U CN205461764U CN 205461764 U CN205461764 U CN 205461764U CN 201620126118 U CN201620126118 U CN 201620126118U CN 205461764 U CN205461764 U CN 205461764U
- Authority
- CN
- China
- Prior art keywords
- spray gun
- ozone
- sncr
- flue gas
- district
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000007921 spray Substances 0.000 title claims abstract description 54
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000003546 flue gas Substances 0.000 title claims abstract description 29
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000004088 simulation Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 10
- 239000004202 carbamide Substances 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 6
- 238000006477 desulfuration reaction Methods 0.000 claims description 5
- 230000023556 desulfurization Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 6
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 239000003245 coal Substances 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 235000011114 ammonium hydroxide Nutrition 0.000 description 7
- 239000003638 chemical reducing agent Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010531 catalytic reduction reaction Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model relates to a novel little spray gun SNCR+ ozone flue gas denitration device, including the boiler, blender and ozone generator, the boiler below is provided with air heater, spray gun district and boiler economizer, a coal economizer and an air preheater, spray gun district and boiler economizer top -down set gradually, the regional SNCR reaction zone that is of atomizing in spray gun district, the spray gun district is provided with a plurality of evenly distributed's atomizing spray gun through flow field simulation, the entry of atomizing spray gun sets up to single interface, 20% aqueous ammonia has let in in the single interface, the spray gun district links to each other with the flue gas input port of blender through flue gas pipeline, ozone generator passes through ozone conveying pipe and says with the ozone input port of blender continuously, compared with the prior art, the utility model, combined characteristics such as SNCR technological investment province and ozone technology are simple, denitration efficiency is high, and the few investment cost of equipment is few, is favorable to realizing discharge to reach standard, satisfies the energy saving and emission reduction index of country.
Description
[ technical field ]
The utility model belongs to the technical field of nitrogen oxide processing apparatus technique and specifically relates to a novel little spray gun SNCR + ozone flue gas denitration device.
[ background art ]
At present, the SCR technology and the SNCR technology are commonly adopted for flue gas denitration, and both play positive roles in reducing nitrogen oxide emission and improving the environment, however, some new problems are also presented in succession according to the current use condition, such as: the method has the advantages of high operation cost, high corrosivity, a complex control system, high site requirement and more steel structures.
[ contents of utility model ]
The utility model aims at solving foretell not enough and providing a novel little spray gun SNCR + ozone flue gas denitration device, combined SNCR technical investment province and characteristics such as ozone technical simplicity, be favorable to realizing discharge to reach standard, satisfy the energy saving and emission reduction index of country.
Design a novel little spray gun SNCR + ozone flue gas denitration device for realizing above-mentioned purpose, including boiler 1, blender 5 and ozone generator 6, 1 below of boiler is provided with air heater 2, spray gun district 3 and boiler economizer 4, air heater 2, spray gun district 3 and 4 top-down of boiler economizer set gradually, the atomizing area of spray gun district 3 is SNCR reaction zone, spray gun district 3 is provided with a plurality of evenly distributed's atomizing spray gun through the flow field simulation, atomizing spray gun's entry sets up to single interface, it has 20% aqueous ammonia to let in the single interface, spray gun district 3 links to each other with the flue gas input port of blender 5 through flue gas pipeline 501, ozone generator 6 links to each other with the ozone input port of blender 5 through ozone pipeline 502.
The nozzle taper angle of the atomizing spray gun is 120-150 degrees, and the atomizing granularity of the atomizing spray gun is 150 microns.
The entry linkage urea demineralized water mixed liquid transfer port 301 of atomizing spray gun, urea demineralized water mixed liquid transfer port 301 the place ahead is connected with the force pump.
The temperature of the SNCR reaction zone is 850-.
And a reacted gas output port is arranged on the mixer 5 and is connected with a desulfurization workshop section device through an output pipeline 503.
Compared with the prior art, the utility model, have following advantage:
(1) the denitration efficiency is high, the denitration efficiency of a single SNCR (selective non-catalytic reduction) process is low, and the SNCR + ozone process is more than 80%;
(2) the SNCR preliminary denitration adopts a small spray gun, only one spray gun inlet is needed, the spray gun does not need compressed air and desalted water, 20% ammonia water is directly used for spraying, the spray amount of the spray gun is small, the denitration effect is good, the consumption of the ammonia water is low, the spray gun is suitable for boilers with special hearths, the equipment is small, and the investment cost is low;
(3) the small spray gun device is a single inlet, a compressed air tank, an air compressor and a demineralized water tank are not needed, the space adaptability is strong, a complex steel structure is not needed, and meanwhile, the investment is saved;
(4) the ozone reactor has small occupied area and strong space adaptability, saves investment and is not limited by the field;
(5) a reducing agent injection system is simplified, the injection interval of the hearth reducing agent is enlarged, and the denitration efficiency of the SNCR stage is improved;
(6) more safe urea and ozone can be conveniently used as the denitration reducing agent;
(7) is beneficial to realizing the emission reaching the standard and meets the national indexes of energy conservation and emission reduction.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of an atomizing spray gun according to the present invention;
FIG. 3 is a schematic view of the mixer of the present invention;
in the figure: 1. boiler 2, air heater 3, spray gun district 4, boiler economizer 5, blender 6, ozone generator 301, urea demineralized water mixed liquor delivery port 501, flue gas pipeline 502, ozone pipeline 503, output pipeline.
[ detailed description of the invention ]
The invention is further described below with reference to the accompanying drawings:
as shown in the attached drawings, the utility model comprises: boiler 1, blender 5 and ozone generator 6, boiler 1 below is provided with air heater 2, spray gun district 3 and boiler economizer 4, air heater 2, spray gun district 3 and boiler economizer 4 top-down set gradually, the atomizing area in spray gun district 3 is SNCR reaction zone, spray gun district 3 is through the flow field simulation, be provided with a plurality of evenly distributed's atomizing spray gun, the entry of atomizing spray gun sets up to single interface, it has 20% aqueous ammonia to let in the single interface, 20% aqueous ammonia that lets in is atomized through the spray gun in the stove high temperature pyrolysis back with the NO in the flue gasXAnd in the reaction, the temperature of the SNCR reaction zone is 850-.
The utility model discloses in, every atomizing spray gun has a single interface, and every atomizing spray gun flow jet volume is little, and every nozzle cone angle 120-. Ozone generated by an ozone generator and flue gas from a flue are mixed and reacted in a mixer, the flue gas reacted in an SNCR reaction zone enters the mixer, and residual NO in the flue gas reacts with the ozone introduced into the mixer by the ozone generator to generate NO2、N2O3、N2O5Generation of NO2、N2O3、N2O5From the mixer into the desulfurization section where it is removed.
As shown in fig. 2, the inlet of the atomizing spray gun is connected to the mixed solution delivery port 301 of the urea demineralized water, and a pressure pump is connected in front of the mixed solution delivery port 301 of the urea demineralized water, so that the urea solution in the mixed solution delivery port 301 of the urea demineralized water is sprayed into the boiler by the pressure of the pump in front.
As shown in fig. 3, a reacted gas outlet is arranged on the mixer 5, the reacted gas outlet is connected with a desulfurization section device through an output pipeline 503, a flue gas conveying pipeline 501 is connected into the mixer 4, an ozone conveying pipeline 502 is connected into the mixer, flue gas reacts with ozone in the mixer, and the reacted gas is sent out to the desulfurization section through the output pipeline 503 to be removed.
The utility model provides a flue gas denitration technology SNCR + ozone is in single SNCR, ozone and takes off the selling efficiency and can not reach, and the Selective Catalytic Reduction (SCR) investment is an optimization under the great condition and takes off the selling mode. This mode has reduced compressed air, directly sprays the flue gas in the boiler with the aqueous ammonia, has reduced engineering cost and running cost, is an efficient flue gas denitration technology. Wherein,
the SNCR technical principle is as follows: the selective non-catalytic reduction (SNCR) technique is to inject a reducing agent such as an ammonia solution into a furnace to selectively react with NOx. The reducing agent is sprayed into the hearth at 850-1050 deg.c to evaporate and decompose into NH3And carrying out SNCR reaction with NOx in the flue gas to generate N2The method takes a hearth as a reactor.
4NH3+4NO+O2→4N2+6H2O (reducing agent ammonia)
The technical principle of ozone denitration is as follows: the ozone denitration technology is to use O3Oxidizing NO which is difficult to dissolve in water in the smoke into high-valence NO2Then absorbing the nitrogen oxide with high valence state by using alkaline solution. The generated nitrate is concentrated or discharged.
NO+O3→NO2+O2
HNO3+NaOH→NaNO3+H2O
The present invention is not limited by the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and are all included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a novel little spray gun SNCR + ozone flue gas denitration device which characterized in that: including boiler (1), mixer (5) and ozone generator (6), boiler (1) below is provided with air heater (2), spray gun district (3) and boiler economizer (4), air heater (2), spray gun district (3) and boiler economizer (4) top-down set gradually, the atomizing area in spray gun district (3) is SNCR reaction zone, spray gun district (3) are provided with a plurality of evenly distributed's atomizing spray gun through the flow field simulation, the entry of atomizing spray gun sets up to single interface, it has 20% aqueous ammonia to let in the single interface, spray gun district (3) link to each other through the flue gas input port of flue gas pipeline (501) with mixer (5), ozone generator (6) link to each other through the ozone input port of ozone pipeline (502) with mixer (5).
2. The novel small lance SNCR + ozone flue gas denitration device of claim 1, characterized in that: the nozzle taper angle of the atomizing spray gun is 120-150 degrees, and the atomizing granularity of the atomizing spray gun is 150 microns.
3. The novel small lance SNCR + ozone flue gas denitration device of claim 1 or 2, characterized in that: the entry linkage urea demineralized water mixed liquid transfer port (301) of atomizing spray gun, urea demineralized water mixed liquid transfer port (301) the place ahead is connected with the force pump.
4. The novel small lance SNCR + ozone flue gas denitration device of claim 3, characterized in that: the temperature of the SNCR reaction zone is 850-.
5. The novel small lance SNCR + ozone flue gas denitration device of claim 4, characterized in that: and a reacted gas output port is arranged on the mixer (5), and the reacted gas output port is connected with a desulfurization working section device through an output pipeline (503).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620126118.3U CN205461764U (en) | 2016-02-18 | 2016-02-18 | Novel little spray gun SNCR+ ozone flue gas denitration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620126118.3U CN205461764U (en) | 2016-02-18 | 2016-02-18 | Novel little spray gun SNCR+ ozone flue gas denitration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205461764U true CN205461764U (en) | 2016-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620126118.3U Expired - Fee Related CN205461764U (en) | 2016-02-18 | 2016-02-18 | Novel little spray gun SNCR+ ozone flue gas denitration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205461764U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106215657A (en) * | 2016-09-19 | 2016-12-14 | 成都华西堂环保科技有限公司 | A kind of flue gas pollutant purification method |
-
2016
- 2016-02-18 CN CN201620126118.3U patent/CN205461764U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106215657A (en) * | 2016-09-19 | 2016-12-14 | 成都华西堂环保科技有限公司 | A kind of flue gas pollutant purification method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170118 Address after: 201203 Shanghai Zhangjiang hi tech park fanchun Road No. 400 Building 1 floor 301-324 room 3 Patentee after: SHANGHAI SHENLYU ENERGY SAVING ENVIRONMENTAL PROTECTION ENGINEERING DESIGN RESEARCH AND DEVELOPMENT CO., LTD. Address before: Pudong New Area Heqing town Dongchuan road 201201 Shanghai City No. 5227 Building 2 Patentee before: Huang Shengjian |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20180218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |