CN205669806U - A kind of system for the removing of gas fired-boiler nitrogen oxides in effluent - Google Patents
A kind of system for the removing of gas fired-boiler nitrogen oxides in effluent Download PDFInfo
- Publication number
- CN205669806U CN205669806U CN201620541136.8U CN201620541136U CN205669806U CN 205669806 U CN205669806 U CN 205669806U CN 201620541136 U CN201620541136 U CN 201620541136U CN 205669806 U CN205669806 U CN 205669806U
- Authority
- CN
- China
- Prior art keywords
- burner
- regulation valve
- sequentially connected
- steam
- boiler
- 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.)
- Active
Links
Abstract
The utility model discloses a kind of system for the removing of gas fired-boiler nitrogen oxides in effluent, including fuel cartridge, the outlet of fuel cartridge is sequentially connected with first-class gauge and the first regulation valve, and connects burner by the first afterbody interface of burner；Vapor can arranges way outlet pipeline, one way outlet is sequentially connected with second gauge and the second regulation valve, and connecting burner by the second afterbody interface of burner, its another way outlet is sequentially connected with the 3rd effusion meter and the 3rd regulation valve, and connects combustor by steam to entrance；Also including aerator, blower export is sequentially connected with the 4th effusion meter and the 4th regulation valve, and connects burner by the 3rd afterbody interface of burner.This utility model system has that denitration efficiency is high, it is little to take up room, equipment investment is low, without the feature that existing equipment is changed on a large scale, be widely used in the denitration technology transformation of the supporting and existing gas fired-boiler of newly-built gas fired-boiler.
Description
Technical field
This utility model relates to chemical industry fuel gas buring denitration technology field, particularly to one in gas fired-boiler flue gas
The system of removal of nitrogen oxide.
Background technology
Along with iron and steel and the fast development of coking industry, the yield of coke-stove gas is also greatly improved, and its Appropriate application more comes
More come into one's own.Coke-stove gas is primarily used to fuel, inevitably discharges useless flue gas in combustion process.October 1 in 2012
National standard " coking chemistry emission of industrial pollutants standard " 1,611 2012 pairs of discharged nitrous oxides of GB that day implements have had
Being strict with, " standard " defines the NO of " area especially " smelting coke oven smoke stack emissionXLimit value is 150mg/m3, can be considered international
On the severeest coke oven environmental protection standard, embody country and strict control of these area coal chemical enterprise pollutant emissions wanted
Ask, beyond doubt for country for the needs of ecological environment frailty area special protection.Therefore, in time, system, in depth carry out
The research of coke-stove gas low nitrogen oxide burning technology shows important especially.
In coke-stove gas, organic nitrogen content is few, can only produce fraction Quick-type NOx, raw almost without fuel type NOx
Become.The NOx 95% produced in coke-stove gas combustion process is temperature heating power type.Therefore, coke-stove gas is burnt, suppression temperature
The generation of degree thermal NO x is the main path realizing its burning low NOx drainage.Traditional coking mode is difficult to revolutionary character
Change, Coke-oven Design deflection super-hugeization is its development trend.In order to ensure the production efficiency of coke oven, need to improve quirk temperature
Degree.The raising of fire path temperature can make to produce in coke oven combustion process substantial amounts of NOx, and traditional technology can not meet low NOx row
The requirement put.
The nitrogen oxides that coke-stove gas burning produces is mainly temperature heating power type, therefore, it is achieved the low nitrogen of coke-stove gas aoxidizes
The technology that thing burning can use mainly has following several: waste gas circulation, Researched of Air Staging Combustion Burning Pulverized Coal, coke-stove gas fractional combustion, height
The technology such as temperature low oxygen combustion, the burning of deep or light deviation, particular design burner, catalysis burning, or combine in several ways
Method.Can also use burning post processing method to reduce the discharge of nitrogen oxides, such as selective non-catalytic denitration, selectivity
Catalytic denitration, wet flue gas denitration technology, plasma process flue gas NOx Treatment process.The technology that domestic application is more at present
The main method using burning post processing reduces the discharge of nitrogen oxides, such as selective catalytic reduction SCR (Selective
Catalytic Reduction) and SNCR method SNCR (Selective Non-Catalytic
Reduction).SCR method refer to the nitrogen oxides in flue gas under the effect of catalyst, with denitrification reducing agent (NH3Or carbamide)
Reaction generates the N of nontoxic pollution-free2And H2O.Due to the existence of catalyst, SCR method denitration reaction efficiency is high, but this method
Strict restriction is had for catalyst and reaction compartment.By aging effects, catalyst needs periodic replacement, and operating cost is relatively
High.If not reserving denitrification apparatus arrangement space during capital construction, the difficulty carrying out after putting into operation transforming is bigger.SNCR method is not required to
Catalyst to be used, it is possible to nitrogen oxides reduction in the range of 850 DEG C～1000 DEG C.In this temperature range, denitrification reducing agent
(NH3Or carbamide) N can be generated with the reaction of nitrogen oxides in flue gas2.SNCR method system is simple, it is not necessary to catalyst, operating cost
It is relatively low, but reaction temperature is required strict and denitration efficiency is relatively low, if the original discharged nitrous oxides concentration of flue gas is relatively
Height, uses SNCR method to be difficult to meet environment protection emission requirement.Meanwhile, above technology all exists that retrofit work amount is big, invests into
The drawbacks such as this is big, operation and maintenance cost is high.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the purpose of this utility model is to provide a kind of for gas fired-boiler cigarette
In gas, the system of removal of nitrogen oxide, uniformly premixes steam with gaseous fuel, it is not necessary to catalyst, ammonia absorb reactant and other
Spare system and equipment, utilize steam to have the specific heat capacity higher than air, reduce flame temperature thus reduce the generation of NOx, reach
To the purpose controlling discharge.
In order to achieve the above object, the technical scheme of this utility model/utility model is:
A kind of system for the removing of gas fired-boiler nitrogen oxides in effluent, including fuel cartridge 1, the outlet of fuel cartridge 1 depends on
The first-class gauge of secondary connection 2 and the first regulation valve 3, and connect burner 5 by the first afterbody interface 4 of burner 5；Vapor can
6 arrange way outlet pipeline, and one way outlet is sequentially connected with second gauge 7 and the second regulation valve 8, and by the of burner 5
Two afterbody interfaces 9 connect burner 5, and its another way outlet is sequentially connected with the 3rd effusion meter 10 and the 3rd regulation valve 11, and passes through
Steam connects combustor 17 to entrance 12；Also including aerator 13, aerator 13 outlet is sequentially connected with the 4th effusion meter 14 and the
Four regulation valves 15, and connect burner 5 by the 3rd afterbody interface 16 of burner 5.
System described above, for the method for gas fired-boiler nitrogen oxides in effluent removing, comprises the steps:
Step 1, fuel cartridge 1, through first-class gauge 2 and the first regulation valve 3, provide enough gas quantities to burner 5, reach
Ignition temperature needed for boiler；
Step 2, vapor can 6 provide enough quantity of steam to burner 5；
Step 3, aerator 13, through the 4th effusion meter 14 and the 4th regulation valve 15, provide burning required air to burner 5
Amount；
Carry out after above-mentioned 3 step operatings working properly simultaneously；Combustion gas, steam burn in burner 5 with air, reach
The purpose of removing nitrogen oxides in effluent；
Vapor can 6 described in step 2 provides enough quantity of steam in the following way one or mode two or mode to burner 5
One and mode two all use:
Mode one is for spraying into steam in combustor 17 to entrance 12 by steam；
Mode two is to be passed through steam by the second afterbody interface 9 of burner 5 to connect burner 5, with combustion gas at burner 5
Combustor 17 is fed after interior premixing.
Steam and gas medium is mixed by described burner 5 mutually, utilizes carrying medium to carry reducing agent, and carrying medium is empty
Gas.
Steam emitted dose is 2～3 with the mol ratio of fuel quantity.
The steam that described vapor can 6 provides is low-pressure steam, and Stress control is 0.5～0.7MPa.
Described burner 5 stretches out the refractory casting bed of material of combustor 17.
Described fuel cartridge 1 is taked shorten flame spread scope and increase the measure of oxygen diffusivity.
This utility model method is by taking shortening flame spread scope, increasing oxygen diffusivity and suppress nitrogen diffusibility
Deng measure, reach following purpose: the highest temperature region volume formed after reducing fuel combustion, high fuel injection speed is same
Sample decreases flame closed area volume.By fuel and the uniform premix of steam so that the equivalent concentration table of fuel and oxygen
Face inside contracts, and diffusion flame scope shortens；After mixing, volume flow raises needs higher nozzle injection kinetic energy, adds in oxygen
The diffusion rate of convection current component；Flame enclosed area is higher convection current group grading factors after moving inward and burning, make oxygen and
Nitrogen is concurrently present in the time of front end, flame enclosed area substantially to be shortened.Owing to using combustion gas to make fuel-side dilute after steam
Releasing, flame front moves to fuel-side so that thermograde increases, and diffusibility and Concentraton gradient increase, thus burn rate adds
Speed.NOx maximum occurs in the region after running out of gas, fuel and steam homogeneous mixture and increases injection kinetic energy so that oxygen
Gas increases to the diffusibility of flame, and fuel and steam homogeneous mixture make burning accelerate so that have higher temperature ladder in flame
Degree, the existence of water vapour decreases the concentration of nitrogen, and therefore NOx emission reduces, and owing to there is more oxygen, CO keeps relatively low
Level.
Compared with prior art, the utility model has the advantages that:
1) this technique denitration efficiency can meet existing environmental requirement, and steam denitrating technique is simple, and cost of investment is low, and system is tieed up
Protect maintenance convenient.
2) steam medium used by denitration is easy to get, and operating cost is low.
3) steam denitration non-secondary pollution.
In sum, this utility model has NO_x Reduction by Effective, technique is simple, cost of investment is low, operating cost is low, without secondary
The advantages such as pollution.
Accompanying drawing explanation
Fig. 1 is gas fired-boiler steam denitrating system figure.
Detailed description of the invention
As it is shown in figure 1, a kind of system for the removing of gas fired-boiler nitrogen oxides in effluent of this utility model, including combustion gas
Tank 1, the outlet of fuel cartridge 1 is sequentially connected with first-class gauge 2 and the first regulation valve 3, and by the first afterbody interface of burner 5
4 connect burner 5；Vapor can 6 arranges way outlet pipeline, and one way outlet is sequentially connected with second gauge 7 and the second regulation valve
8, and connect burner 5 by the second afterbody interface 9 of burner 5, its another way outlet be sequentially connected with the 3rd effusion meter 10 and
3rd regulation valve 11, and connect combustor 17 by steam to entrance 12；Also include that aerator 13, aerator 13 export and connect successively
Connect the 4th effusion meter 14 and the 4th regulation valve 15, and connect burner 5 by the 3rd afterbody interface 16 of burner 5.
This utility model system, for the method for gas fired-boiler nitrogen oxides in effluent removing, comprises the following steps:
Step one, fuel cartridge 1, through effusion meter 2 and regulation valve 3, provide enough gas quantities to burner 5, reach boiler institute
The ignition temperature needed；
Step 2, vapor can 6, through effusion meter 7 and regulation valve 8, provide enough quantity of steams to burner 5；
Step 3, aerator 13, through effusion meter 14 and regulation valve 15, provide burning required air quantity to burner 5；
Carry out after above-mentioned 3 step operatings working properly simultaneously；Combustion gas, steam burn in burner 5 with air, reach
The purpose of removing nitrogen oxides in effluent.
In order to realize the economical and efficient of reaction, this utility model system is connected with flue gas monitoring system, and denitration steam sprays
The amount of penetrating is controlled by flue gas monitoring system, and when nitrogen oxides in effluent content increases, steam emitted dose increases therewith, works as flue gas
Middle amount of nitrogen oxides reduces steam emitted dose and decreases.
In order to preferably realize being sufficiently mixed of steam and gas, after steam and gas is passed through burner mix homogeneously,
Spraying in combustor, injection apparatus jet is connected to atomizer.
Core of the present utility model is that one is that to use steam be reducing medium, and source is convenient, and non-secondary pollution generates,
Utilize steam to have the specific heat capacity higher than air, reduce flame temperature, thus reduce the generation of NOx, reach to control the mesh of discharge
's；Its two for use steam and gas pre-mixing concepts before combustion feed, be conducive to improve NOx CER；It is three for adopting
Use special-purpose ejecting device, strengthen the mixing uniformity of steam and gas, be conducive to improving the CER of NOx.
Claims (1)
1. the system for the removing of gas fired-boiler nitrogen oxides in effluent, it is characterised in that: include fuel cartridge (1), combustion gas
The outlet of tank (1) is sequentially connected with first-class gauge (2) and the first regulation valve (3), and by the first afterbody interface of burner (5)
(4) burner (5) is connected；Vapor can (6) arranges way outlet pipeline, and one way outlet is sequentially connected with second gauge (7) and
Two regulations valve (8), and connect burner (5) by the second afterbody interface (9) of burner (5), its another way outlet connects successively
Connect the 3rd effusion meter (10) and the 3rd regulation valve (11), and connect combustor (17) by steam to entrance (12)；Also include drum
Blower fan (13), aerator (13) outlet is sequentially connected with the 4th effusion meter (14) and the 4th regulation valve (15), and by burner (5)
The 3rd afterbody interface (16) connect burner (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620541136.8U CN205669806U (en) | 2016-06-06 | 2016-06-06 | A kind of system for the removing of gas fired-boiler nitrogen oxides in effluent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620541136.8U CN205669806U (en) | 2016-06-06 | 2016-06-06 | A kind of system for the removing of gas fired-boiler nitrogen oxides in effluent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205669806U true CN205669806U (en) | 2016-11-02 |
Family
ID=57190934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620541136.8U Active CN205669806U (en) | 2016-06-06 | 2016-06-06 | A kind of system for the removing of gas fired-boiler nitrogen oxides in effluent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205669806U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889921A (en) * | 2016-06-06 | 2016-08-24 | 中国华能集团清洁能源技术研究院有限公司 | System for removing nitric oxide in smoke of gas boiler and method of system |
-
2016
- 2016-06-06 CN CN201620541136.8U patent/CN205669806U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889921A (en) * | 2016-06-06 | 2016-08-24 | 中国华能集团清洁能源技术研究院有限公司 | System for removing nitric oxide in smoke of gas boiler and method of system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7842266B2 (en) | Method of denitration of exhaust gas and apparatus therefor | |
| CN106765217B (en) | A kind of organic waste gas furnace and incinerating method | |
| CN104190253A (en) | Coke oven flue gas SCR denitration system | |
| CN102179171B (en) | Multi-stage themolysis coupled denitration method using front flow field uniformizing device and device thereof | |
| CN105889921A (en) | System for removing nitric oxide in smoke of gas boiler and method of system | |
| CN104190252A (en) | Multistage pyrolysis coupled flue gas denitrification system with independent SCR (Selective Catalytic Reduction) ammonia-supplementing spray guns | |
| CN104138705B (en) | A kind of chemical emission treating apparatus and treatment process | |
| CN102425793A (en) | Self-backheating swirling burner for fuel gas with low heat value | |
| KR101699614B1 (en) | Burner system | |
| CN106582808A (en) | Catalyst for catalysis of production of hydroxyl free radical from ozone and gasified hydrogen peroxide/water, and use thereof | |
| CN105135449A (en) | Incineration treatment system for HPF waste liquid | |
| JP2020112280A (en) | Boiler device and thermal power generation facility, capable of carrying out mixed combustion of ammonia | |
| KR102513495B1 (en) | Methods for Increasing the Efficiency of Continuous Combustion Systems | |
| CA2046083C (en) | Apparatus and method for reducing nitrogen oxide emissions from gas turbines | |
| CN205669806U (en) | A kind of system for the removing of gas fired-boiler nitrogen oxides in effluent | |
| CN106310933A (en) | Flue gas denitration system for coal water slurry boiler and method for denitrating flue gas | |
| CN205174397U (en) | A incineration disposal system for HPF waste liquid | |
| CN209828701U (en) | Preparation facilities of mixed denitrifier based on aqueous ammonia + hydrazine | |
| KR200421615Y1 (en) | LOW NOx GAS BURNER | |
| CN104930533A (en) | Flue gas reheating apparatus for sintering flue gas denitration | |
| CN102798129B (en) | Efficient thermal oxidation furnace for low afterburning-amount smoke constant-speed grading reaction | |
| CN102671532B (en) | Enhanced selective non-catalytic reduction flue gas denitrification method | |
| CN202087235U (en) | Multi-level thermolysis coupling denitrification device with pre-flow field equalizing device | |
| KR102261150B1 (en) | A Low-NOx combustor capable of internal recirculation of flue gas by using venturi effect through improvement of burner structure | |
| CN105536487A (en) | Multi-point injected ammonia water atomization reduction method for reducing NOx discharge of gas-fired boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |