CN205379792U - Energy -saving boiler flue gas denitration device - Google Patents
Energy -saving boiler flue gas denitration device Download PDFInfo
- Publication number
- CN205379792U CN205379792U CN201620127777.9U CN201620127777U CN205379792U CN 205379792 U CN205379792 U CN 205379792U CN 201620127777 U CN201620127777 U CN 201620127777U CN 205379792 U CN205379792 U CN 205379792U
- Authority
- CN
- China
- Prior art keywords
- urea liquid
- carbamide
- conveyance conduit
- flue gas
- energy
- 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
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 239000003546 flue gas Substances 0.000 title claims abstract description 16
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 193
- 239000004202 carbamide Substances 0.000 claims abstract description 100
- 239000007788 liquid Substances 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 238000002425 crystallisation Methods 0.000 claims abstract description 6
- 230000008025 crystallization Effects 0.000 claims abstract description 5
- 235000013877 carbamide Nutrition 0.000 claims description 92
- 230000006698 induction Effects 0.000 claims description 9
- 238000011033 desalting Methods 0.000 claims description 3
- 238000005253 cladding Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses an energy -saving boiler flue gas denitration device, prepare conveying system including urea solution, urea solution prepares conveying system and includes urea preparation jar, removes salty water convey pipeline, urea solution pipeline and urea solution holding vessel, the outer cladding of urea solution pipeline has heat transfer device, be equipped with heat exchange media channel and edge in the heat transfer device the heat transferring medium that heat exchange media channel flows. Can effectively avoid leading to the fact urea crystallization in the pipeline because the temperature reduces through cladding heat transfer device outside urea solution pipeline. Heat transferring medium among the heat transfer device can be water or other liquid to can reuse.
Description
Technical field
This utility model relates to a kind of energy-saving boiler flue gas denitrification apparatus.
Background technology
SNCR technology (SNCR) is the reducing agent such as NH3 or carbamide to be sprayed in stove carry out selective non-catalytic reaction with NOx, and reducing agent rapid thermal decomposition becomes NH2And with the NOx in flue gas carry out SNCR react generation N2And H2O.SNCR denitration technique NOx removal rate is more than 55%, and the escapement ratio of ammonia is less than 7.5ppm.Boiler NOx concentration be can effectively control, environmental emission standard and the effective minimizing NOx discharge pollution to atmospheric environment met.Total chemical equation of SNCR denitration know-why is: (NH2)2CO+NO+NO2→2N2+CO2+2H2O.SNCR technology, with burner hearth for reactor, utilizes high-temperature area suitable in stove to carry out NOx reduction reaction, it is not necessary to expensive catalyst and bulky reactor, initial investment is low, and the construction period is short, and operating cost is relatively low.
Urea liquid preparation induction system is included with the SNCR system that carbamide is reducing agent, on-line dilution system, metering mixing system, spraying system and electric control system etc., urea liquid preparation induction system mainly realizes the function of urea storage, solution preparation and solution storage.But crystalline polamer often occurs in urea liquid in actual use, not only cause pipeline blockage, have an effect on urea concentration, denitration effect impact is bigger.
Summary of the invention
Technical problem to be solved in the utility model is the defect overcoming prior art, it is provided that a kind of energy-saving boiler flue gas denitrification apparatus, it is possible to be prevented effectively from crystallisation problems in urea liquid course of conveying.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
A kind of energy-saving boiler flue gas denitrification apparatus, induction system is prepared including urea liquid, described urea liquid preparation induction system includes carbamide preparing tank, desalt water conveyance conduit, urea liquid conveyance conduit and urea liquid holding vessel, described urea liquid conveyance conduit is coated with heat-exchanger rig, is provided with heat exchanging medium passage and the heat transferring medium flowed along described heat exchanging medium passage in described heat-exchanger rig.
Preferably, described heat exchanging medium passage is helically wound around described urea liquid conveyance conduit, and axially extending to described urea liquid conveyance conduit.
Preferably, described heat exchange medium flow direction is contrary with the conveying direction of urea liquid in described urea liquid conveyance conduit.
Preferably, the temperature of described heat transferring medium is higher than the crystallization temperature of carbamide in described urea liquid conveyance conduit.
Preferably, described in the water transfer passage that desalts include desalting waterpipe to described carbamide preparing tank conveying the first of the water that desalts, and desalt waterpipe to described urea liquid holding vessel conveying the second of the water that desalts.
Preferably, described urea liquid conveyance conduit includes the first conveyance conduit connecting carbamide preparing tank and urea liquid holding vessel, and connects the second conveyance conduit of urea liquid holding vessel and next out of stock system.
Preferably, described carbamide preparing tank is arranged over carbamide placing tank and carbamide transport channel, and described carbamide transport channel is provided with carbamide outlet.
The beneficial effect that this utility model reaches:
The water conveyance conduit that desalts carries the water that desalts in carbamide preparing tank and urea liquid holding vessel, with preparation or dilute urine cellulose solution, urea liquid conveyance conduit, for being transferred out by the urea liquid in carbamide preparing tank and urea liquid holding vessel, causes carbamide crystallization in the duct by being prevented effectively from urea liquid conveyance conduit outer cladding heat-exchanger rig because temperature reduces.Heat transferring medium in heat-exchanger rig can be water or other liquid, and can reuse.
Accompanying drawing explanation
Fig. 1 is the urea liquid preparation induction system of energy-saving boiler flue gas denitrification apparatus in preferred embodiment；Wherein: 1. carbamide preparing tank, 2. desalt water conveyance conduit, and 21. first desalt waterpipe, 22. second desalts waterpipe, 3. urea liquid holding vessel, 4. urea liquid conveyance conduit, 41. first conveyance conduits, 42. the second conveyance conduit, 5. heat-exchanger rig, 51. heat exchanging medium passages, 6. carbamide placing tank, 61. carbamide transport channel, 62. carbamide outlets.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is further described.Following example are only for clearly illustrating the technical solution of the utility model, and can not limit protection domain of the present utility model with this.
A kind of energy-saving boiler flue gas denitrification apparatus, prepares induction system, on-line dilution system, metering mixing system, spraying system and electric control system etc. including urea liquid.As shown in Figure 1, urea liquid preparation induction system includes carbamide preparing tank 1, desalt water conveyance conduit 2, urea liquid conveyance conduit 4 and urea liquid holding vessel 3, urea liquid conveyance conduit 4 is coated with heat-exchanger rig 5, is provided with heat exchanging medium passage 51 and the heat transferring medium along the flowing of this heat exchanging medium passage 51 in heat-exchanger rig 5.Heat transferring medium is water.
Specifically, heat exchanging medium passage 51 is helically wound around urea liquid conveyance conduit 4, and axially extending to urea liquid conveyance conduit 5.Heat exchange medium flow direction is contrary with the conveying direction of urea liquid in urea liquid conveyance conduit 4.So can improve heat exchange efficiency.
Specifically, the temperature of heat transferring medium is higher than the crystallization temperature of carbamide in urea liquid conveyance conduit 4.
Specifically, the water transfer passage 2 that desalts includes desalting waterpipe 21 to carbamide preparing tank 1 conveying the first of the water that desalts, and desalts waterpipe 22 to urea liquid holding vessel 3 conveying the second of the water that desalts.Urea liquid conveyance conduit 4 includes the first conveyance conduit 41 connecting carbamide preparing tank 1 and urea liquid holding vessel 3, and connects the second conveyance conduit 42 of urea liquid holding vessel 3 and next out of stock system.
Specifically, carbamide preparing tank 1 is arranged over carbamide placing tank 6 and carbamide transport channel 61, and carbamide transport channel 61 is provided with carbamide outlet 62.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the premise without departing from this utility model know-why; can also making some improvement and deformation, these improve and deformation also should be regarded as protection domain of the present utility model.
Claims (7)
1. an energy-saving boiler flue gas denitrification apparatus, induction system is prepared including urea liquid, it is characterized in that, described urea liquid preparation induction system includes carbamide preparing tank, desalt water conveyance conduit, urea liquid conveyance conduit and urea liquid holding vessel, described urea liquid conveyance conduit is coated with heat-exchanger rig, is provided with heat exchanging medium passage and the heat transferring medium flowed along described heat exchanging medium passage in described heat-exchanger rig.
2. a kind of energy-saving boiler flue gas denitrification apparatus according to claim 1, it is characterised in that described heat exchanging medium passage is helically wound around described urea liquid conveyance conduit, and axially extending to described urea liquid conveyance conduit.
3. a kind of energy-saving boiler flue gas denitrification apparatus according to claim 1 and 2, it is characterised in that described heat exchange medium flow direction is contrary with the conveying direction of urea liquid in described urea liquid conveyance conduit.
4. a kind of energy-saving boiler flue gas denitrification apparatus according to claim 3, it is characterised in that the temperature of described heat transferring medium is higher than the crystallization temperature of carbamide in described urea liquid conveyance conduit.
5. a kind of energy-saving boiler flue gas denitrification apparatus according to claim 1, it is characterized in that, the described water transfer passage that desalts includes desalting waterpipe to described carbamide preparing tank conveying the first of the water that desalts, and desalts waterpipe to described urea liquid holding vessel conveying the second of the water that desalts.
6. a kind of energy-saving boiler flue gas denitrification apparatus according to claim 1 or 5, it is characterized in that, described urea liquid conveyance conduit includes the first conveyance conduit connecting carbamide preparing tank and urea liquid holding vessel, and connects the second conveyance conduit of urea liquid holding vessel and next out of stock system.
7. a kind of energy-saving boiler flue gas denitrification apparatus according to claim 1, it is characterised in that described carbamide preparing tank is arranged over carbamide placing tank and carbamide transport channel, and described carbamide transport channel is provided with carbamide outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620127777.9U CN205379792U (en) | 2016-02-19 | 2016-02-19 | Energy -saving boiler flue gas denitration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620127777.9U CN205379792U (en) | 2016-02-19 | 2016-02-19 | Energy -saving boiler flue gas denitration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205379792U true CN205379792U (en) | 2016-07-13 |
Family
ID=56349842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620127777.9U Expired - Fee Related CN205379792U (en) | 2016-02-19 | 2016-02-19 | Energy -saving boiler flue gas denitration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205379792U (en) |
-
2016
- 2016-02-19 CN CN201620127777.9U patent/CN205379792U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160713 |