CN110316744A - A kind of device being used to prepare ammonia - Google Patents
A kind of device being used to prepare ammonia Download PDFInfo
- Publication number
- CN110316744A CN110316744A CN201910724049.4A CN201910724049A CN110316744A CN 110316744 A CN110316744 A CN 110316744A CN 201910724049 A CN201910724049 A CN 201910724049A CN 110316744 A CN110316744 A CN 110316744A
- Authority
- CN
- China
- Prior art keywords
- ammonia
- flow
- ammonia generator
- generator
- flue gas
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/08—Preparation of ammonia from nitrogenous organic substances
- C01C1/086—Preparation of ammonia from nitrogenous organic substances from urea
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of devices for being used to prepare ammonia, it is characterised in that: including ammonia generator and the flow-disturbing face being arranged on ammonia generator inner wall, ammonia generator inner wall is equipped with support frame, and support frame is equipped with flow-disturbing face；The quantity in ammonia generator and flow-disturbing face is at least one；The exit of ammonia generator is arranged in flow-disturbing face.Spray gun is inserted into ammonia generator, and flue gas direction is entered by the bottom inlet in flow-disturbing face.The present invention has many advantages, such as that high-efficient, structure is simple, safe and reliable, energy conservation and environmental protection, and manufacture and operating cost are lower, and the present invention improves the ammonia conversion ratio of urea by the optimization design to ammonia generator structure.The arrangement in flow-disturbing face can play the role of the formed turbulent flow of enhancing and vortex intensity.
Description
Technical field
Ammonia device is used to prepare the present invention relates to one kind more particularly to a kind of for improving the ammonia conversion ratio of urea
Device belongs to denitrating flue gas field.
Background technique
With Industrial Economic Development, atmosphere pollution is increasingly severe.A kind of main atmosphere pollution is nitrogen oxides, nitrogen
Oxide not only damages animals and plants, destroys ozone layer, stimulates the respiratory system of people, and be also cause greenhouse effects, acid rain and
One of photochemically reactive main matter.All over the world the discharge limitation of nitrogen oxides is required all to tend to be tightened up.
Nitrogen oxides reduces draining technology scheme and mainly has at present: (1) low-NO_x combustion technology controls in combustion
The generation of nitrogen oxides is primarily adapted for use in large coal-fired boiler etc.；(2) SCR technology (SCR, Selective
Catalytic Reduction), it is the mainstream applications technology in current China's gas denitrifying technology；(3) selective non-catalytic is also
Former technology (SNCR, Selective Non-Catalytic Reduction), is mainly used for the medium and small pot such as garbage burning factory
Furnace, technology maturation, but its efficiency are lower than SCR technology；(4) SCR technology (SCR)+selective non-catalytic is also
Former technology (SNCR), is mainly used for large coal-fired boiler low-nitrogen oxide discharging and place limited situation, is also relatively more suitable for old
Boiler improvement project.
The SCR technology (SCR technology) of mainstream, the basic principle is that utilizing reducing agent (such as NH3Deng)
Nitrogen oxides is switched to by catalytic action by harmless nitrogen in catalyst surface, achievees the purpose that nitrogen oxides decrement discharge.
The technology of preparing of reducing agent ammonia plays a key role in flue gas denitrification system.
In the existing technical solution for being related to the preparation of denitrating flue gas reducing agent ammonia, patent No. CN106966409A discloses one
Kind ammonia system processed, though the technology is related to the technology of denitrating flue gas reducing agent ammonia preparation, which is evaporated using liquefied ammonia
Method prepares ammonia；Patent No. CN108796537A discloses a kind of thermal power plant's electrolytic hydrogen production synthesis ammonia system, though the technology relates to
And the technology of denitrating flue gas reducing agent ammonia preparation, but the technology is to synthesize the technology of ammonia again using water electrolysis hydrogen production.
CN106966409A and CN108796537A is respectively used to the preparation of reducing agent ammonia needed for flue gas denitrification system.
Liquefied ammonia harm to the human body employed in CN106966409A is larger, belongs to dangerous material limitation and uses.CN108796537A is adopted
Synthesize the technology of ammonia with nitrogen again with water electrolysis hydrogen production, technique involved by the technology and equipment are more complex, and higher cost generates ammonia
The efficiency of gas is lower, is not suitable for the preparation of ammonia needed for flue gas denitrification system.
To solve the problems, such as prepared by reducing agent ammonia needed for flue gas denitrification system, the invention proposes one kind to be used to prepare ammonia
The device of gas, the device have that high-efficient, structure is simple, safe and reliable, energy conservation and environmental protection, and manufacture and operating cost is more low
Advantage, the present invention improve the ammonia conversion ratio of urea by the optimization design to ammonia generator structure.
Summary of the invention
It is a primary object of the present invention to solve the problems, such as prepared by reducing agent ammonia needed for flue gas denitrification system.
To achieve the above object, the technical solution adopted by the present invention is a kind of device for being used to prepare ammonia, and feature exists
In: including ammonia generator and the flow-disturbing face (6-2) being arranged on ammonia generator inner wall (6-1), ammonia generator inner wall (6-
1) it is equipped with support frame, support frame is equipped with flow-disturbing face (6-2)；The quantity in ammonia generator and flow-disturbing face is at least one；It disturbs
The exit of ammonia generator is arranged in stream interface (6-2).Spray gun (11) is inserted into ammonia generator, and flue gas direction is by flow-disturbing face
The bottom inlet of (6-2) enters.
A kind of device being used to prepare ammonia, cross-sectional shapes are ammonia generator inner wall (6-1) in the axial direction
Multistage continuously coupled curve-like or polyline shaped, each section of curve-like or polyline shaped；The cross-sectional shapes of ammonia generator inner wall (6-1)
For the narrow structure in intermediate wide both ends, axial length, that is, smoke inlet at the smoke inlet of ammonia generator to ammonia generator section shape
The axial line distance of shape the widest part is less than axial length, that is, outlet flue at the outlet flue of ammonia generator to ammonia generator section
The axial line distance of shape the widest part.
The cross-sectional shapes of flow-disturbing face (6-2) in the axial direction are curve-like or polyline shaped.
A kind of device being used to prepare ammonia, using being connected in series or in parallel between each ammonia generator.
A kind of device being used to prepare ammonia, it is characterised in that: each ammonia generator arranged in series；Such as Fig. 2-
Two kinds of concrete modes that 1 and Fig. 2-2 is shown in arranged in series: first way be each ammonia generator inner wall on be all provided with
Stream interface is thanksed for your hospitality, M flow-disturbing face is shared；The second way is that m-th series connection ammonia is only arranged at the concatenated ammonia generator of m-th
Gas generator flow-disturbing face (6-2-M) shares a flow-disturbing face；The quantity of flow-disturbing face arrangement and position are according to numerical simulation calculation
Effect determines that M is positive integer.
A kind of device being used to prepare ammonia, it is characterised in that: each ammonia generator parallel arrangement；Such as Fig. 3
It show one of parallel arrangement concrete mode；The exit of each ammonia generator is connected in parallel by pipeline.
A kind of device being used to prepare ammonia, it is characterised in that: when flue gas in flue flow velocity is lower than 0.5m/s,
Flow-disturbing face (6-2) can be not added.
A kind of device being used to prepare ammonia, it is characterised in that: the device best operating condition for preparing ammonia is
Flue-gas temperature into ammonia generator is 300~650 DEG C.
Urea liquid atomization in ammonia generator (6) under the action of compressed air and spray gun (11) nozzle, such as Fig. 1,
Urea microlayer model after atomization spreads with flow of flue gas and mixes with flue gas, ammonia of the mixed flue gas at least 1 section arcuation
Under the collective effect in gas generator inner wall (6-1) and curvilinear flow-disturbing face (6-2), turbulent flow and vortex, the turbulent flow of flue gas are formed
The intensity that urea microlayer model is spread in flue gas can be enhanced, mix urea microlayer model more fully with flue gas；The whirlpool of flue gas
Stream can extend the time that urea microlayer model generates ammonia in ammonia generator (6)；Urea microlayer model after atomization is raw in ammonia
It grows up to be a useful person to decompose under the conditions of 400~550 DEG C of flue-gas temperature in (6) and generates ammonia.Flow-disturbing face (6-2) play the formed turbulent flow of enhancing with
The effect of vortex intensity.
Compared with prior art, the present invention has the advantages that.
The invention proposes a kind of device for being used to prepare ammonia, the device is with high-efficient, structure is simple, safely can
Lean on, energy conservation and environmental protection, and manufacture and operating cost it is lower the advantages that, the present invention passes through the optimization design to ammonia generator structure
To improve the ammonia conversion ratio of urea.The arrangement in flow-disturbing face can play the role of the formed turbulent flow of enhancing and vortex intensity.
Detailed description of the invention
A kind of apparatus structure schematic diagram for being used to prepare ammonia of Fig. 1.
In figure: 6-1, ammonia generator inner wall, 6-2, flow-disturbing face, 11, spray gun.
A kind of 1 schematic diagram of apparatus structure serial arrangement for being used to prepare ammonia of Fig. 2-1.
In figure: 6-1-M, M ammonia generator inner wall, 6-2-M, M flow-disturbing face；M is positive integer.
A kind of 2 schematic diagram of apparatus structure serial arrangement for being used to prepare ammonia of Fig. 2-2.
A kind of apparatus structure parallel arrangement schematic diagram for being used to prepare ammonia of Fig. 3.
In figure: 6-1-N, n-th ammonia generator inner wall, 6-2-N, n-th ammonia generator flow-disturbing face, 11, spray gun；N
For positive integer.
Fig. 4 one kind is used for gas internal-combustion engine flue gas tail portion denitrating system schematic diagram.
In figure: 1, gas fired-boiler, 2, lithium bromide equipment, 3, low-temperature SCR reactor, 4, low temperature catalyst, 5, chimney, 6, ammonia
Gas generator, 7, urea solution tank, 8, compressed air cylinder, 9, urea liquid pipe, 10, compressed air hose, 11, spray gun, 12, adjusting
Valve, 13, blower, 14, bypass flue, 15, flue, 16, heat exchanger.
Specific embodiment
Below in conjunction with figure, by taking certain distributed busbar protection 4.4MW gas internal-combustion engine unit flue gas denitrification system as an example, to this hair
It is bright to be described further.
Certain distributed busbar protection 4.4MW gas internal-combustion engine unit flue gas denitrification system, such as Fig. 1 and Fig. 4, gas internal-combustion engine
(1) flue-gas temperature is 430~550 DEG C at, reaches as high as 600 DEG C, generated output is 4.4MW, in gas internal-combustion engine rate of load condensate
Exhaust gas volumn is dry state 19888Nm when being 100%3/ h, in standard state, butt 5%O2Under the conditions of NOxIt is 500mg/Nm3；Bromination
The flue gas exit temperature of lithium equipment (2) is 145 DEG C；Low temperature catalyst (4) preference temperature scope is 170~400 DEG C；In low temperature
Heat exchanger (16) are added between SCR reactor (3) and chimney (5).
The exhaust gas volumn in bypass flue (14) is adjusted by high temperature frequency conversion fan (13) and regulating valve (12), makes low-temperature SCR
Reactor (3) inlet flue-gas temperature is 175 DEG C；Low-temperature SCR reactor (3) exit, heat exchanger (16) inlet flue gas temperature
Essentially 175 DEG C of degree, by heat exchanger (16), temperature is 72 DEG C to flue gas afterwards, is emptied by chimney (5).
Heat exchanger (16) is added between low-temperature SCR reactor (3) and chimney (5), and efficiency is higher afterwards.
The urea liquid that concentration is 30~50% in urea solution tank (7) enters spray gun (11) by urea liquid pipe (9),
The compressed air that pressure is 0.3~0.8 kilogram in compressed air cylinder (8) enters spray gun (11) by compressed air hose (10), spray
Rifle (11) vertical axial is inserted into ammonia generator (6).Urea liquid is under the action of compressed air and spray gun (11) nozzle in ammonia
Atomization in gas generator (6), such as Fig. 1, the urea microlayer model after atomization spreads with flow of flue gas and mixes with flue gas, after mixing
Flue gas under the ammonia generator inner wall (6-1) of at least one section arcuation and the collective effect in curvilinear flow-disturbing face (6-2), shape
At turbulent flow and vortex, the turbulent flow of flue gas can enhance the intensity that urea microlayer model is spread in flue gas, make urea microlayer model and flue gas
More fully mix；The vortex of flue gas is able to extend the time that urea microlayer model generates ammonia in ammonia generator (6)；Atomization
Urea microlayer model afterwards decomposes under the conditions of 400~550 DEG C of flue-gas temperature in ammonia generator (6) and generates ammonia, by ammonia
The Optimal Structure Designing of gas generator (6) such as Fig. 1 improves the ammonia conversion ratio of urea.
Ammonia generated enters low-temperature SCR reactor (3) with flue gas, and the nitrogen oxides in flue gas and generated ammonia exist
The surface of low temperature catalyst (4) carries out catalysis reaction and generates nitrogen, low-temperature SCR reactor (3) exit NOxIn standard state, butt
5%O2It is 30mg/Nm under condition concentration3。
Special case: when flue gas in flue flow velocity is lower than 0.5m/s, flow-disturbing face can be not added.
Finally, it is stated that: embodiment of above is only to illustrate the present invention, and be not intended to limit the present invention described technology
Scheme；Therefore, although this specification referring to above embodiment to present invention has been detailed description, this field
It is to be appreciated by one skilled in the art that still can modify to the present invention or equivalent replacement；And all do not depart from the present invention
The technical solution and its improvement of spirit and scope, should all cover within the scope of the claims of the present invention.
Claims (8)
1. a kind of device for being used to prepare ammonia, it is characterised in that: including ammonia generator and be arranged in ammonia generator inner wall
Flow-disturbing face (6-2) on (6-1), ammonia generator inner wall (6-1) are equipped with support frame, and support frame is equipped with flow-disturbing face (6-2)；
The quantity in ammonia generator and flow-disturbing face is at least one；The exit of ammonia generator is arranged in flow-disturbing face (6-2)；Spray gun
(11) it is inserted into ammonia generator, flue gas direction is entered by the bottom inlet of flow-disturbing face (6-2).
2. a kind of device for being used to prepare ammonia according to claim 1, it is characterised in that: ammonia generator inner wall (6-
1) cross-sectional shapes are the continuously coupled curve-like or polyline shaped of multistage in the axial direction；The section of ammonia generator inner wall (6-1)
Shape is the narrow structure in intermediate wide both ends, and axial length, that is, smoke inlet to the ammonia generator at the smoke inlet of ammonia generator is cut
The axial line distance of face shape the widest part is less than axial length, that is, outlet flue at the outlet flue of ammonia generator to ammonia generator
The axial line distance of cross-sectional shapes the widest part.
3. a kind of device for being used to prepare ammonia according to claim 1, it is characterised in that: between each ammonia generator
Using being connected in series or in parallel.
4. a kind of device for being used to prepare ammonia according to claim 3, it is characterised in that: each ammonia generator series connection
Arrangement；Arranged in series is there are two types of concrete mode: first way be each ammonia generator inner wall on be equipped with flow-disturbing face, altogether
There is M flow-disturbing face；The second way is that m-th series connection ammonia generator is only arranged at the concatenated ammonia generator of m-th to disturb
Stream interface (6-2-M) shares a flow-disturbing face；The quantity of flow-disturbing face arrangement and position are determining according to the effect of numerical simulation calculation, M
For positive integer.
5. a kind of device for being used to prepare ammonia according to claim 3, it is characterised in that: each ammonia generator is in parallel
Arrangement；The exit of each ammonia generator is connected in parallel by pipeline.
6. a kind of device for being used to prepare ammonia according to claim 1, it is characterised in that: when flue gas in flue flow velocity is low
When 0.5m/s, flow-disturbing face (6-2) is not added.
7. a kind of device for being used to prepare ammonia according to claim 1, it is characterised in that: prepare the device work of ammonia
It is 300~650 DEG C that condition, which is into the flue-gas temperature of ammonia generator,.
8. a kind of device for being used to prepare ammonia according to claim 1, it is characterised in that: urea liquid is in compressed air
With atomization, the urea microlayer model after atomization expand with flow of flue gas in the ammonia generator (6) under the action of spray gun (11) nozzle
It dissipates and is mixed with flue gas, ammonia generator inner wall (6-1) and curvilinear flow-disturbing of the mixed flue gas at least one section arcuation
Under the collective effect in face (6-2), forming turbulent flow and vortex, the turbulent flow of flue gas can enhance what urea microlayer model was spread in flue gas
Intensity mixes urea microlayer model more fully with flue gas；The vortex of flue gas extends urea microlayer model in ammonia generator (6)
Generate the time of ammonia；Urea microlayer model after atomization divides under the conditions of 400~550 DEG C of flue-gas temperature in ammonia generator (6)
Solution generates ammonia；Play the role of the formed turbulent flow of enhancing and vortex intensity in flow-disturbing face (6-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910724049.4A CN110316744A (en) | 2019-08-07 | 2019-08-07 | A kind of device being used to prepare ammonia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910724049.4A CN110316744A (en) | 2019-08-07 | 2019-08-07 | A kind of device being used to prepare ammonia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110316744A true CN110316744A (en) | 2019-10-11 |
Family
ID=68125645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910724049.4A Pending CN110316744A (en) | 2019-08-07 | 2019-08-07 | A kind of device being used to prepare ammonia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110316744A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113144642A (en) * | 2021-03-16 | 2021-07-23 | 北京工大环能科技有限公司 | Device for evaporation pyrolysis |
-
2019
- 2019-08-07 CN CN201910724049.4A patent/CN110316744A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113144642A (en) * | 2021-03-16 | 2021-07-23 | 北京工大环能科技有限公司 | Device for evaporation pyrolysis |
| CN114307859A (en) * | 2021-03-16 | 2022-04-12 | 北京工大环能科技有限公司 | Device for evaporation pyrolysis |
| CN113144642B (en) * | 2021-03-16 | 2024-03-26 | 北京紫黄科技有限公司 | Device for evaporation pyrolysis |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102179171B (en) | Multi-stage themolysis coupled denitration method using front flow field uniformizing device and device thereof | |
| CN100484612C (en) | Abrasion proof, vortex street strong mixing equipment in grille of spraying ammonia | |
| CN104474896B (en) | Coal fired power plant SCR denitration system based on CFD optimize and revise method | |
| CN103994456A (en) | Integrated system for efficiently and synergistically removing multiple pollutants | |
| Li | Optimization and reconstruction technology of SCR flue gas denitrification ultra low emission in coal fired power plant | |
| CN107626205A (en) | Boiler denitration in the stove method complete set of equipments | |
| CN102179157A (en) | Ammonia spraying grate and adjusting method thereof | |
| CN208436636U (en) | Boiler smoke temperature adjustment structure and the boiler flue gas denitration system for applying it | |
| CN110316744A (en) | A kind of device being used to prepare ammonia | |
| CN202715356U (en) | Low temperature selective catalytic reduction (SCR) static bed flue gas denitration device of horizontal type heat recovery boiler | |
| CN209178005U (en) | A kind of ammonia preparation facilities for flue gas denitrification system | |
| CN202136913U (en) | Pure oxygen medium blocking discharge desulfurization and denitration system in flue | |
| CN2892253Y (en) | Flue denitrator setting under boiler coal saver of spraying ammine grid | |
| CN206391868U (en) | A kind of SCR flue gas denitrification systems mixing ammonia-gas spraying device | |
| CN109534359A (en) | A kind of ammonia preparation facilities for flue gas denitrification system | |
| CN209406067U (en) | One kind being used for gas internal-combustion engine fume high-temperature type denitrating system | |
| CN211098427U (en) | Medium-temperature type denitration system for flue gas of gas internal combustion engine | |
| CN202113779U (en) | Spiral-flow type ammonia spraying device used for SCR (Selective Catalytic Reduction) denitration system | |
| CN109569296B (en) | Medium-temperature denitration system for flue gas of gas internal combustion engine | |
| CN210885332U (en) | Be used for preparing ammonia device | |
| CN210021739U (en) | SCR denitration system for industrial kiln tail gas NOx | |
| CN208990526U (en) | A kind of device of combustion-steaming combined cycle unit Novel flue gas wet denitration | |
| CN207708806U (en) | A kind of mixing arrangement of ammonia sky gaseous mixture and flue gas | |
| CN103084063A (en) | Optimization method aiming at SNCR denitration | |
| CN102658025A (en) | Low-temperature SCR (selective catalytic reduction) fixed bed fume denitration device for horizontal waste heat boiler |
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 |