CN107469608A - Reducing agent sprayer unit for denitrating flue gas - Google Patents
Reducing agent sprayer unit for denitrating flue gas Download PDFInfo
- Publication number
- CN107469608A CN107469608A CN201710812530.XA CN201710812530A CN107469608A CN 107469608 A CN107469608 A CN 107469608A CN 201710812530 A CN201710812530 A CN 201710812530A CN 107469608 A CN107469608 A CN 107469608A
- Authority
- CN
- China
- Prior art keywords
- section
- reducing agent
- entrance
- pipeline
- outlet
- 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.)
- Pending
Links
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 75
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 239000003546 flue gas Substances 0.000 title claims abstract description 24
- 239000007789 gas Substances 0.000 claims abstract description 75
- 238000002347 injection Methods 0.000 claims abstract description 68
- 239000007924 injection Substances 0.000 claims abstract description 68
- 239000007921 spray Substances 0.000 claims abstract description 68
- 238000002156 mixing Methods 0.000 claims abstract description 60
- 239000012530 fluid Substances 0.000 claims abstract description 30
- 238000005507 spraying Methods 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims description 36
- 239000007788 liquid Substances 0.000 claims description 27
- 239000000112 cooling gas Substances 0.000 claims description 12
- 239000003595 mist Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 238000000889 atomisation Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 2
- 239000004568 cement Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- 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
- B01D53/79—Injecting reactants
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
- B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
- B05B7/0491—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid the liquid and the gas being mixed at least twice along the flow path of the liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The present invention relates to a kind of reducing agent sprayer unit for denitrating flue gas, including reducing agent fluid pipeline and the gas injection pipeline being sheathed on outside reducing agent fluid pipeline, the reducing agent fluid pipeline includes the first entrance section being fixedly connected sequentially, venturi pipeline section, first mixing section and first outlet section, the gas injection pipeline includes the second entrance section being fixedly connected sequentially, second mixing section and second outlet section, second mixing section is sheathed on the outside of the first mixing section, two annular spraying baffle plates are respectively equipped with the both ends of the second mixing section to be fixedly connected with the both ends of the first mixing section, first mixing section is provided with several first spray holes and is used to connect the first mixing section and the second mixing section, the spraying baffle plate is provided with several second spray holes and is used to connect second entrance section, second mixing section and second outlet section.The present invention is simple in construction, is easily installed and dismantles, while good using multistage mixing, atomization, spray effect.
Description
Technical field
The present invention relates to denitration technology, and in particular to a kind of reducing agent sprayer unit for denitrating flue gas.
Background technology
At present, China's cement industry has striden into the ranks of high speed development.According to statistics, domestic cement output in 2016 is dashed forward
It is broken 2,400,000,000 tons, wherein more than 90% cement is both from new dry process working system.The discharge of cement industry nitrogen oxides is
More than the 10% of total displacement, have become except the 3rd emission source of thermal power generation, motor vehicle exhaust emission.Nitrogen oxides is main
One of atmosphere pollution, the physical and mental health of people can be had a strong impact on and destroy ball ecological environment.
Denitration technology more general at present is selective non-catalytic reduction (SNCR), SCR
Denitration technology (SCR) and grading combustion technology.Wherein, SNCR technologies are the skills that whole world manufacture of cement denitration is most widely used
Art.Its operation principle is to be used as reducing agent by becoming solution after dissolving by ammoniacal liquor or using urea, passes through spray gun atomization direct
Connect and spray into (800~1050 DEG C) the progress SNCR reactions of cement rotary kiln or the suitable temperature province of dore furnace,
NOx is reduced into N2, the denitration efficiency of the type can reach 55%~80%.
Spray gun is the core technology of SNCR denitration technique.The main function of spray gun is to be atomized reducing agent, and it is atomized
Effect directly influences the mixability of reducing agent and flue gas, and then has influence on reduction reaction, and finally influences denitration efficiency.By
High-temperature region (maximum temperature is up to 1350 DEG C) work is chronically in SNCR reducing agent spray guns, meanwhile, by high temperature gas flow
The impact of a large amount of particles, it is easy to cause spray gun to deform upon, and then influence the atomizing effect of spray gun, influence denitration efficiency.
The content of the invention
In order to overcome drawbacks described above, the present invention provides a kind of reducing agent sprayer unit for denitrating flue gas, the device knot
Structure is simple, working stability, can realize the multiple atomization to reducing agent (ammoniacal liquor or urea liquid), and atomizing effect is good, effectively solution
Determined existing spray gun loss is big, the problem of cost is high, atomizing effect is poor and spray gun easily deforms upon.
The present invention in order to solve its technical problem used by technical scheme be：
A kind of reducing agent sprayer unit for denitrating flue gas, including reducing agent fluid pipeline and it is sheathed on reducing agent liquid
Gas injection pipeline outside pipeline, the reducing agent fluid pipeline include first entrance section, the Venturi tube being fixedly connected sequentially
Section, the first mixing section and first outlet section, the first entrance section are provided with first entrance, and the first outlet section is provided with the first spray
Mouth, the gas injection pipeline include the second entrance section, the second mixing section and the second outlet section that are fixedly connected sequentially, and described the
Two entrances are provided with second entrance, and the second outlet section is provided with second nozzle, the second entrance section and first entrance Duan Gu
Fixed closing connection, and first entrance is located at the outside of second entrance section, second mixing section is sheathed on the outer of the first mixing section
Side, two annular spraying baffle plates are respectively equipped with the both ends of the second mixing section and are fixedly connected with the both ends of the first mixing section, institute
The first mixing section is stated to be used to connect the first mixing section and the second mixing section provided with several first spray holes, it is described to spray on baffle plate
It is used to connect second entrance section, the second mixing section and second outlet section, the first outlet section provided with several second spray holes
Positioned at the inside of second outlet section.
Preferably, the outside of the gas injection pipeline also covers cooling air pipe, the cooling air pipe include according to
Secondary the head linkage section being fixedly connected, main leg and afterbody linkage section, and second entrance is located at the outside of head linkage section, it is described
Main leg is provided with the 3rd entrance close to one end of head linkage section, and the other end is provided with the 3rd outlet, and the head linkage section is fixed
Second entrance section is connected to, the afterbody linkage section is fixedly connected on second outlet section, and the end of the second outlet section protrudes
In the outside of the afterbody linkage section.
Preferably, the central axis of the reducing agent fluid pipeline, gas injection pipeline and cooling air pipe is at one
On straight line, the reducing agent fluid pipeline, gas injection pipeline and cooling air pipe are co-axially mounted.
Preferably, the head linkage section of the cooling air pipe is fixedly connected with main leg by flange, main leg and
Afterbody linkage section is detachably connected by screw thread.
Preferably, the first jet is tapering type pyramidal structure and is located at the end of first outlet section, and described second goes out
The distal end faces of mouth section are arc-shaped end face, and the second nozzle is on arc-shaped end face.
Preferably, the second nozzle be a diameter of 5~16mm cylindrical hole, and with the center of gas injection pipeline
5 °~35 ° of angle is formed between axis, the distance between the second nozzle and first jet are 10~16mm.
Preferably, the second spray holes that the spraying baffle plate is provided with are uniformly distributed, the second spray holes fluid circulation side
To the diameter parallel with gas injection pipeline.
Preferably, first spray holes are a diameter of 1~3mm circular ports, between the adjacent first spray holes hole heart
Distance is 50~70mm.
Preferably, the first entrance section of the reducing agent fluid pipeline, venturi pipeline section, the first mixing section and first outlet
Dismountable connected mode is used between section, the second entrance section of the gas injection pipeline, the second mixing section and second go out
Dismountable connected mode is used between mouth section.
The beneficial effects of the invention are as follows：
1) communicated by the first mixing section and the second mixing section in the present apparatus and constitute the first spray chamber, first outlet section and the
Two outlet sections constitute the second spray chamber, and the space between first jet and second nozzle forms the 3rd spray chamber, reducing agent
Liquid enters reducing agent fluid pipeline by first entrance, and gas injection enters gas injection pipeline by second entrance, injection
Gas is respectively by the second spray after the first spray chamber, the second spray chamber and the 3rd spray chamber to reducing agent liquid be atomized three times
Mouth sprays into dore furnace.Therefore, gas injection can be atomized three times to reducing agent liquid in the present invention, and reducing agent is finally by mist
The symmetrical liquid drop of 40~70 μm of average grain diameter is turned to, spray effect is good, and the reduction reaction for promoting reducing agent and flue gas is carried out, and is entered
And improve the efficiency of denitrating flue gas；
2) cooling gas pipeline is also arranged with the outside of gas injection pipeline, formation cooling cavities before both is interior logical
There is compressed air, the cooling to gas injection pipeline, the cooling after on the other hand being exchanged heat on the one hand are realized by heat convection
Gas is alternatively arranged as combustion-supporting gas and entered in rotary kiln or dore furnace；At the same time, cooling air pipe is to gas injection pipeline
The effect of protection is served, high temperature corrosion of the high temperature to it being effectively isolated in rotary kiln or dore furnace, therefore gas injection
Pipeline need not be changed often, beneficial to the stability of sprayer unit；, only need to be by cooling gas pipeline according to the installation requirement of the present apparatus
And the arcuate end of gas injection pipeline second outlet section uses the material of corrosion-and high-temp-resistant；
3) this sprayer unit is simple in construction, is easily installed and dismantles, while using multistage mixing, atomization, effect is good, not only
Go for SNCR denitrating flue gas, SCR or the two mixing denitrification process can also be applied to, meanwhile, apply also for boiler
The industries such as denitration.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
In figure：10- reducing agent fluid pipelines, 11- first entrance sections, 12- venturi pipeline sections, the mixing sections of 13- first, 131-
First spray holes, 14- first outlet sections, 15- first entrances, 16- first jets, 20- gas injection pipelines, 21- second entrances
Section, the mixing sections of 22- second, 23- second outlet sections, 24- second entrances, 25- second nozzles, 26- spraying baffle plates, 261- second spray
Mist hole, 30- cooling air pipes, 31- heads linkage section, 32- main legs, 33- afterbody linkage sections, the entrances of 34- the 3rd, 35-
Three outlets, 36- flanges, the spray chambers of 40- first, the spray chambers of 50- second, the spray chambers of 60- the 3rd.
Embodiment
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of protection of the invention.
Embodiment：As shown in figure 1, a kind of reducing agent sprayer unit for denitrating flue gas, including reducing agent fluid pipeline
10 and the gas injection pipeline 20 that is sheathed on outside reducing agent fluid pipeline, the outside of the gas injection pipeline 20 also covers cooling gas
Body pipeline 30, the reducing agent fluid pipeline 10 include first entrance section 11, the venturi pipeline section 12, first being fixedly connected sequentially
Mixing section 13 and first outlet section 14, the first entrance section 11 are provided with first entrance 15, and the first outlet section 14 is provided with the
One nozzle 16, the gas injection pipeline 20 include second entrance section 21, the second mixing section 22 and second being fixedly connected sequentially
Outlet section 23, the second entrance section 21 are provided with second entrance 24, and the second outlet section 23 is provided with second nozzle 25, and described
Two entrances 21 are connected with the fixed closed of first entrance section 11, and first entrance 15 is located at the outside of second entrance section 21, described
Second mixing section 22 is sheathed on the outside of the first mixing section 13, and two annular sprays are respectively equipped with the both ends of the second mixing section 22
Mist baffle plate 26 is fixedly connected with the both ends of the first mixing section 13, and first mixing section 13 is provided with several first spray holes 131
For connecting the first mixing section 13 and the second mixing section 22, the spraying baffle plate 26 is used provided with several second spray holes 261
It is located at second outlet section in connection second entrance section 21, the second mixing section 22 and second outlet section 23, the first outlet section 14
23 inside.The present invention be used for denitrating flue gas reducing agent sprayer unit by be mutually arranged reducing agent fluid pipeline 10, injection
Gas pipeline 20 and cooling air pipe 30 are formed, and wherein reducing agent fluid pipeline is sheathed in gas injection pipeline, spray gas
Body pipeline is sheathed in cooling air pipe, and second entrance 24 can be opened in the upper side wall of gas injection pipeline 20, and second enters
Mouth section 21 is connected with the fixed closed of first entrance section 11, can so ensure that gas injection has enough pressure through the second spray
The atomization of mist hole 261 and then realization to reducing agent liquid, and promote the ejection of biphase gas and liquid flow；In use, reducing agent
Liquid sprays into dore furnace after being atomized in this sprayer unit by gas injection to it, cooling gas is used for cooling injection gas
Body, reducing agent fluid pipeline 10 are used for the entrance and circulation of reducing agent liquid, and gas injection pipeline 20 is used for entering for gas injection
Enter and circulate, cooling air pipe 30 is used for the entrance and circulation of cooling gas, is mixed in device by the first mixing section and second
Duan Xiangtong constitutes the first spray chamber 40, and first outlet section and second outlet section constitute the second spray chamber 50, first jet 16
Space between second nozzle 25 forms the 3rd spray chamber 60, and reducing agent liquid enters reducing agent liquid by first entrance 15
Body pipeline 10, gas injection enter gas injection pipeline 20 by second entrance 24, gas injection respectively the first spray chamber 40,
Second spray chamber 50 and the 3rd spray chamber 60 are atomized three times to reducing agent liquid, and reducing agent is finally atomized as average grain diameter
40~70 μm of symmetrical liquid drop, dore furnace is sprayed into by second nozzle 25.Therefore, gas injection can be to reducing agent liquid in the present invention
Body is atomized three times, and reducing agent is finally atomized the symmetrical liquid drop for 40~70 μm of average grain diameter, and spray effect is good, so as to promote
The reduction reaction for having entered reducing agent and flue gas is carried out, and then improves the efficiency of denitrating flue gas.
The cooling air pipe 30 being arranged outside the gas injection pipeline 20 includes the head connection being fixedly connected sequentially
Section 31, main leg 32 and afterbody linkage section 33, and second entrance 24 is located at the outside of head linkage section 31, the main leg 32 leans on
One end of nearly head linkage section is provided with the 3rd entrance 34, and the other end is provided with the 3rd outlet 35, and the head linkage section 31, which is fixed, to be connected
Second entrance section 21 is connected to, the afterbody linkage section 33 is fixedly connected on second outlet section 23, the end of the second outlet section 23
Outside of the distal process for the afterbody linkage section 33.Gas injection pipeline 20 is the core component of the present apparatus, and replacement frequency is unsuitable
It is excessive, protected, the 3rd can be entered so being additionally provided with cooling air pipe 30 and being sheathed on the outside of gas injection pipeline 20
Mouth 34 is opened in the lower wall of cooling air pipe 30, and the 3rd outlet 35 is opened in the upper side walls of cooling air pipe, the head
Portion's linkage section and afterbody linkage section are fixedly connected using thread connecting mode with gas injection pipeline, and cooling gas enters cooling gas
The cooling insulated space formed between body inner-walls of duct and gas injection pipeline outer wall, the cooling gas after being exchanged heat are gone out by the 3rd
Mouth 35 flows out, and enters as combustion-supporting gas in rotary kiln or dore furnace, cooling air pipe serves guarantor to gas injection pipeline
The effect of shield, therefore gas injection pipeline need not be changed often, beneficial to the stability of sprayer unit.So, reducing agent liquid line
The material of road and gas injection pipeline (except exposing cooling air pipe part) can use common corrosion-resistant metal materials
Such as stainless steel；And expose in cooling air pipe and gas injection pipeline cooling air pipe partially due to long
Phase exposed to high temperature, powder concentration upper zone, need to use high temperature resistance, resistance to erosion and anti-oxidant alloy material or ceramic material
Material.
The central axis of the reducing agent fluid pipeline 10, gas injection pipeline 20 and cooling air pipe 30 is straight at one
On line, the reducing agent fluid pipeline 10, gas injection pipeline 20 and cooling air pipe 30 are co-axially mounted.Specifically, institute
In first entrance section 11, venturi pipeline section 12, the first mixing section 13 and the first outlet section 14 of stating reducing agent fluid pipeline 10
Mandrel line point-blank, the second entrance section 21 of gas injection pipeline 20, the second mixing section 22 and second outlet section 23
Central axis point-blank, in the head linkage section 31 of cooling air pipe 30, main leg 32 and afterbody linkage section 33
Mandrel line is also point-blank.
The first entrance section 11 of the reducing agent fluid pipeline 10, venturi pipeline section 12, the first mixing section 13 and first go out
Dismountable connected mode, the second entrance section 21 of the gas injection pipeline 20, the second mixing section are used between mouth section 14
Dismountable connected mode is used between 22 and second outlet section 23.Preferably, screw thread detachable connection can be used, just
In assembly and disassembly.The head linkage section 31 of the cooling air pipe 30 is fixedly connected with main leg 32 by flange 36, main
Pipeline section 32 and afterbody linkage section 33 are detachably connected by screw thread.
The first jet 16 is tapering type pyramidal structure and is located at the end of first outlet section 14, the second outlet section
23 distal end faces are arc-shaped end face, and the second nozzle 25 is on arc-shaped end face.First jet and first outlet section
It is structure as a whole, the arc-shaped end face of the second outlet section protrudes from the afterbody linkage section of cooling air pipe.Described second
Nozzle 25 is a diameter of 5~16mm cylindrical hole, and 5 °~35 ° are formed between the central axis of gas injection pipeline 20
Angle, the distance between the second nozzle 25 and first jet 16 are 10~16mm.Preferably, second nozzle 25 and injection
Angle between the central axis of gas pipeline 20 is 20 °, a diameter of 6mm of second nozzle 25, first jet and second nozzle
The distance between be preferably 12mm.
The second spray holes 261 that the spraying baffle plate 26 is provided with are uniformly distributed, the second spray holes fluid circulating direction
With the diameter parallel of gas injection pipeline 20.Spraying baffle plate 26 is annular metalwork, itself and reducing agent fluid pipeline 10 and injection
For gas pipeline 20 using the connection that is screwed, second spray holes are diameter about 2~4mm manholes, preferably 3mm, and number
Measure it is unlimited, with the flow set of gas injection needed for actual conditions, such as 8-16.First spray holes 131 are straight
Footpath is that 1~3mm the distance between circular port, the adjacent first spray holes hole heart is 50~70mm.Present apparatus concrete structure parameter
It is as follows：Supervisor (the first mixing section, first outlet section etc.) internal diameter of the reducing agent fluid pipeline 10 is 25~35mm, and external diameter is
40mm, venturi pipeline section throat dimension are 15-20mm, preferably 16mm, and first jet 16 is arranged to tapering type pyramidal structure, gone out
Internal diameter at mouthful is 4~7mm, preferably 6mm, and pipe thickness is more than 3mm, preferably 4mm；The diameter of first spray holes is preferably 2mm,
The distance between first spray holes hole heart preferably 60mm, preferably circumferentially distributed 4~6,6.
Certainly, the above is simply illustrated, and structural parameters of the invention are not limited to above design content, also needed according to reducing agent liquid
The flow of body, the structure of dore furnace or rotary kiln and actual process parameter are set.
The present invention the course of work be：By taking the flue gas SNCR denitration technique of new type nonaqueous cement production line as an example；
Step 1：Using the certain density ammoniacal liquor pre-stored, urea or other ammonium salt aqueous solutions as reducing agent, by adding
Enter the first entrance section 11 of reducing agent fluid pipeline 10 after press pump boosting by first entrance 15, reducing agent liquid enters first
Pressure at mouth 15 reaches 0.30~0.50MPa, is then flowed by forming stable liquid after venturi pipeline section 12, by one
After the pipeline section rectification of set a distance, into the first mixing section 13, liquid, which forms thick drop and sprays into second by the first spray holes 131, to be mixed
Close section 22；
Step 2：Meanwhile compressed air (gas injection) is pumped into injection gas by air compressor by air compression pipe
The second entrance 24 of body pipeline 20, the pressure of compressed air pass through baffle plate 26 of spraying up to 0.35~0.55MPa, gas injection
Some second spray holes 261 enter the first spray chamber 40 being made up of the first mixing section and the second mixing section, to reducing agent drop
It is atomized first, the atomization biphase gas and liquid flow preliminarily formed flows out by the spraying baffle plate 26 of opposite side, into first outlet
Second spray chamber 50 of section and second outlet section composition, is atomized, last first jet 16 sprays twice to reducing agent liquid
Go out a small amount of reducing agent liquid not being atomized to the 3rd spray chamber 60 formed between first jet 16 and second nozzle 25, spray gas
Body is atomized to the reducing agent of this part again, and reducing agent is finally atomized the symmetrical liquid drop for 40~70 μm of average grain diameter,
Dore furnace is sprayed into by second nozzle 25, the passive distance of injection can reach 3.8~4.5m, and spray angle can reach 30~60 °；
Step 3：At the same time, cooling gas is pressed into cooling air pipe 30 by air compressor by the 3rd entrance 34,
The pressure of the cooling gas of 3rd porch is 0.20~0.35MPa, gas injection is carried out in cooling air pipe 30 cold
But, 35 it is discharged into dore furnace by the 3rd outlet, is used as combustion air, it is room temperature that cooling gas, which is entered fashionable, during discharge
Temperature is 300~400 DEG C, and cooling insulated space is formed between the inwall of cooling air pipe and the outer wall of gas injection pipeline also
Help to protect gas injection pipeline.
It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, may be used also
To make several modifications and improvements, these belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with
Appended claims are defined.
Claims (9)
- A kind of 1. reducing agent sprayer unit for denitrating flue gas, it is characterised in that：Including reducing agent fluid pipeline (10) and set Gas injection pipeline (20) outside reducing agent fluid pipeline, the reducing agent fluid pipeline (10) include being fixedly connected sequentially First entrance section (11), venturi pipeline section (12), the first mixing section (13) and first outlet section (14), the first entrance section (11) first entrance (15) is provided with, the first outlet section (14) is provided with first jet (16), the gas injection pipeline (20) Including second entrance section (21), the second mixing section (22) and the second outlet section (23) being fixedly connected sequentially, the second entrance Section (21) is provided with second entrance (24), and the second outlet section (23) is provided with second nozzle (25), the second entrance section (21) It is connected with first entrance section (11) fixed closed, and first entrance (15) is located at the outside of second entrance section (21), described second Mixing section (22) is sheathed on the outside of the first mixing section (13), be respectively equipped with the both ends of the second mixing section (22) two it is annular Spraying baffle plate (26) is fixedly connected with the both ends of the first mixing section (13), and first mixing section (13) is provided with several the first sprays Mist hole (131) is used to connect the first mixing section (13) and the second mixing section (22), and the spraying baffle plate (26) is provided with several Second spray holes (261) are used to connect second entrance section (21), the second mixing section (22) and second outlet section (23), and described first Outlet section (14) is located at the inside of second outlet section (23).
- 2. the reducing agent sprayer unit according to claim 1 for denitrating flue gas, it is characterised in that：The gas injection The outside of pipeline (20) also covers cooling air pipe (30), and the cooling air pipe (30) includes the head being fixedly connected sequentially Linkage section (31), main leg (32) and afterbody linkage section (33), and second entrance (24) is located at the outside of head linkage section (31), The main leg (32) is provided with the 3rd entrance (34) close to one end of head linkage section, and the other end is provided with the 3rd outlet (35), institute State head linkage section (31) and be fixedly connected on second entrance section (21), the afterbody linkage section (33) is fixedly connected on second outlet Section (23), the end of the second outlet section (23) protrudes from the outside of the afterbody linkage section (33).
- 3. the reducing agent sprayer unit according to claim 2 for denitrating flue gas, it is characterised in that：The reducing agent liquid The central axis of body pipeline (10), gas injection pipeline (20) and cooling air pipe (30) point-blank, the reduction Agent fluid pipeline (10), gas injection pipeline (20) and cooling air pipe (30) are co-axially mounted.
- 4. the reducing agent sprayer unit according to claim 2 for denitrating flue gas, it is characterised in that：The cooling gas The head linkage section (31) of pipeline (30) is fixedly connected with main leg (32) by flange (36), and main leg (32) connects with afterbody Section (33) is detachably connected by screw thread.
- 5. the reducing agent sprayer unit according to claim 1 for denitrating flue gas, it is characterised in that：The first jet (16) it is for tapering type pyramidal structure and positioned at the end of first outlet section (14), the distal end faces of the second outlet section (23) Arc-shaped end face, the second nozzle (25) is on arc-shaped end face.
- 6. the reducing agent sprayer unit according to claim 5 for denitrating flue gas, it is characterised in that：The second nozzle (25) cylindrical hole for being a diameter of 5~16mm, and 5 °~35 ° are formed between the central axis of gas injection pipeline (20) Angle, the distance between the second nozzle (25) and first jet (16) are 10~16mm.
- 7. the reducing agent sprayer unit according to claim 1 for denitrating flue gas, it is characterised in that：The spraying baffle plate (26) the second spray holes (261) being provided with are uniformly distributed, the second spray holes fluid circulating direction and gas injection pipeline (20) centerline axis parallel.
- 8. the reducing agent sprayer unit according to claim 1 for denitrating flue gas, it is characterised in that：First spraying Hole (131) is a diameter of 1~3mm circular port, and the distance between adjacent first spray holes hole heart is 50~70mm.
- 9. the reducing agent sprayer unit according to claim 1 for denitrating flue gas, it is characterised in that：The reducing agent liquid Between the first entrance section (11) of body pipeline (10), venturi pipeline section (12), the first mixing section (13) and first outlet section (14) Use dismountable connected mode, the second entrance section (21) of the gas injection pipeline (20), the second mixing section (22) and Dismountable connected mode is used between second outlet section (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710812530.XA CN107469608A (en) | 2017-09-11 | 2017-09-11 | Reducing agent sprayer unit for denitrating flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710812530.XA CN107469608A (en) | 2017-09-11 | 2017-09-11 | Reducing agent sprayer unit for denitrating flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107469608A true CN107469608A (en) | 2017-12-15 |
Family
ID=60583851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710812530.XA Pending CN107469608A (en) | 2017-09-11 | 2017-09-11 | Reducing agent sprayer unit for denitrating flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107469608A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297042A (en) * | 2018-06-26 | 2019-02-01 | 宜兴市智博环境设备有限公司 | A kind of injection apparatus and waste gas delivery pipeline roadlock fire system |
| CN110944755A (en) * | 2017-06-01 | 2020-03-31 | Ivm知识产权有限公司 | Hose type sprayer |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2443353A1 (en) * | 2001-04-19 | 2002-10-31 | Exxonmobil Research And Engineering Company | Apparatus and process for enhanced feed atomization |
| FR2894854A1 (en) * | 2005-12-15 | 2007-06-22 | Egci Pillard Sa | MIXING CHAMBER AND SPRAY DEVICE COMPRISING SUCH A ROOM |
| CN201900063U (en) * | 2010-09-29 | 2011-07-20 | 中国石油化工股份有限公司 | Bubble atomizing nozzle |
| CN202265546U (en) * | 2011-09-13 | 2012-06-06 | 郭伟 | Catalytic feeding spray nozzle |
| CN102671533A (en) * | 2012-06-11 | 2012-09-19 | 杭州浙大天元科技有限公司 | Low-air consumption effervescent atomizer applicable to SNCR (selective non-catalytic reduction) denitrification technology |
| CN103028507A (en) * | 2012-12-21 | 2013-04-10 | 宁夏科行环保工程有限公司 | Reducing agent atomizer for SNCR (selective non-catalytic reduction) denitration |
| CN103506233A (en) * | 2013-09-15 | 2014-01-15 | 中国科学院过程工程研究所 | Two-stage atomizing double fluid spraying device |
| CN103764295A (en) * | 2011-07-11 | 2014-04-30 | Omya国际股份公司 | Atomizing nozzle device, atomizing process and use |
| CN204901755U (en) * | 2015-09-10 | 2015-12-23 | 苏州中材建设有限公司 | Reduce cement rotary kiln NOX's coal slurry spray gun |
| CN206435364U (en) * | 2016-12-21 | 2017-08-25 | 盐城清新环境技术有限公司 | Atomizing lance |
-
2017
- 2017-09-11 CN CN201710812530.XA patent/CN107469608A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2443353A1 (en) * | 2001-04-19 | 2002-10-31 | Exxonmobil Research And Engineering Company | Apparatus and process for enhanced feed atomization |
| US6902707B2 (en) * | 2001-04-19 | 2005-06-07 | Exxonmobil Research And Engineering Company | Apparatus and process for enhanced feed atomization |
| FR2894854A1 (en) * | 2005-12-15 | 2007-06-22 | Egci Pillard Sa | MIXING CHAMBER AND SPRAY DEVICE COMPRISING SUCH A ROOM |
| CN201900063U (en) * | 2010-09-29 | 2011-07-20 | 中国石油化工股份有限公司 | Bubble atomizing nozzle |
| US20150013769A1 (en) * | 2011-02-08 | 2015-01-15 | George Saunders | Atomizing nozzle device, atomizing process and use |
| CN103764295A (en) * | 2011-07-11 | 2014-04-30 | Omya国际股份公司 | Atomizing nozzle device, atomizing process and use |
| CN202265546U (en) * | 2011-09-13 | 2012-06-06 | 郭伟 | Catalytic feeding spray nozzle |
| CN102671533A (en) * | 2012-06-11 | 2012-09-19 | 杭州浙大天元科技有限公司 | Low-air consumption effervescent atomizer applicable to SNCR (selective non-catalytic reduction) denitrification technology |
| CN103028507A (en) * | 2012-12-21 | 2013-04-10 | 宁夏科行环保工程有限公司 | Reducing agent atomizer for SNCR (selective non-catalytic reduction) denitration |
| CN103506233A (en) * | 2013-09-15 | 2014-01-15 | 中国科学院过程工程研究所 | Two-stage atomizing double fluid spraying device |
| CN204901755U (en) * | 2015-09-10 | 2015-12-23 | 苏州中材建设有限公司 | Reduce cement rotary kiln NOX's coal slurry spray gun |
| CN206435364U (en) * | 2016-12-21 | 2017-08-25 | 盐城清新环境技术有限公司 | Atomizing lance |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110944755A (en) * | 2017-06-01 | 2020-03-31 | Ivm知识产权有限公司 | Hose type sprayer |
| CN109297042A (en) * | 2018-06-26 | 2019-02-01 | 宜兴市智博环境设备有限公司 | A kind of injection apparatus and waste gas delivery pipeline roadlock fire system |
| CN109297042B (en) * | 2018-06-26 | 2023-12-22 | 宜兴市智博环境设备有限公司 | Injection apparatus and waste gas conveying pipeline fire-retardant system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102160964B (en) | Selective non-catalytic reduction (SNCR) denitration multi-nozzle long-gun injector | |
| CN104888990B (en) | Twin spray gun | |
| CN207187486U (en) | Reducing agent sprayer unit for denitrating flue gas | |
| CN211098424U (en) | Double-fluid denitration spray gun | |
| CN107469608A (en) | Reducing agent sprayer unit for denitrating flue gas | |
| CN204672469U (en) | A kind of SNCR of being applicable to technique carries out injector and the boiler by spraying structure of denitrating flue gas | |
| CN203737460U (en) | Large-flow vane type sprayer for denitration spraying gun | |
| CN216295754U (en) | Spray gun and spraying system for flue gas denitration | |
| CN103007724A (en) | Swirl type denitration ejector of circulating fluidized bed | |
| CN112546498A (en) | Gas-liquid proportional mixer capable of generating foam rapidly in real time | |
| CN201760232U (en) | Spray gun type double-flow nozzle for denitration of smoke | |
| CN108480345A (en) | A kind of spiral vessel surface washer jet | |
| CN209576252U (en) | A kind of denitration spray gun | |
| CN211359251U (en) | Jet-suction type atomizing spray gun | |
| CN211635981U (en) | Energy-saving ammonia water evaporator for flue gas denitration and denitration system | |
| CN204746666U (en) | Flue gas denitration spray gun | |
| CN209271717U (en) | A kind of double-current spray gun body of high-efficient atomizing | |
| CN204220331U (en) | Atomization jetting device | |
| CN206273336U (en) | Novel denitration nozzle base, multiinjector denitration spray gun barral of a gun and denitration spray gun | |
| CN217340810U (en) | Desulfurization denitration is with high-efficient forced air cooling antidrip spray gun | |
| CN216150095U (en) | 360 degree spraying constant temperature aqueous ammonia spray gun | |
| CN205598951U (en) | DeNOx systems reductant injection apparatus | |
| CN217449622U (en) | Full-coverage efficient atomization spraying denitration system for denitration of composite fibers of flue gas of heating furnace | |
| CN205174396U (en) | Spray gun of large -traffic organic waste liquid | |
| CN203291990U (en) | Reducing agent spraying gun suitable for SNCR denitration technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |