CN206454478U - A kind of ammoniacal liquor denitration energy saver - Google Patents
A kind of ammoniacal liquor denitration energy saver Download PDFInfo
- Publication number
- CN206454478U CN206454478U CN201720000582.2U CN201720000582U CN206454478U CN 206454478 U CN206454478 U CN 206454478U CN 201720000582 U CN201720000582 U CN 201720000582U CN 206454478 U CN206454478 U CN 206454478U
- Authority
- CN
- China
- Prior art keywords
- ammoniacal liquor
- gas
- ammonia
- heat exchanger
- evaporator
- 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
- 235000011114 ammonium hydroxide Nutrition 0.000 title claims abstract description 83
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 58
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 29
- 238000010790 dilution Methods 0.000 claims abstract description 16
- 239000012895 dilution Substances 0.000 claims abstract description 16
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000908 ammonium hydroxide Substances 0.000 claims abstract description 10
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 239000007921 spray Substances 0.000 claims abstract description 8
- 238000002309 gasification Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 239000000779 smoke Substances 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 26
- 238000005516 engineering process Methods 0.000 description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 239000003085 diluting agent Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Chimneys And Flues (AREA)
Abstract
The utility model is related to a kind of ammoniacal liquor denitration energy saver, including dilution air, gas-gas heat exchanger, ammoniacal liquor evaporator and ammonia-spraying grid, dilution air is arranged on the air inlet of gas-gas heat exchanger, the gas outlet of gas-gas heat exchanger is connected to the bottom of ammoniacal liquor evaporator, the sidepiece of ammoniacal liquor evaporator is connected with the outlet conduit of ammonium hydroxide delivery pump, the inlet pipeline of ammonium hydroxide delivery pump is installed on the bottom of tank used for storing ammonia, and the top of ammoniacal liquor evaporator is connected to the sidepiece that ammonia sprays grid through pipeline；One end that boiler smoke sprays grid after gas-gas heat exchanger with ammonia is connected, and the other end is connected with Benitration reactor.Use this programme not only can with it is energy-saving, reduce cost, also make denitrating technique simple, simple operation.
Description
Technical field
The utility model is related to the technology of boiler smoke SCR denitration reducing agent feeding mechanism, more particularly to a kind of ammoniacal liquor
Denitration energy saver.
Background technology
The nitrogen oxides of coal-burning power plant's discharge is to cause one of major pollutants of China's atmosphere pollution, therefore, for reality
The minimum discharge of nitrogen oxides in existing coal steam-electric plant smoke, while the operation up to standard of guarantee thermal power plant high-efficiency environment friendly, saves the energy
It is also particularly important with optimization SCR denitration technique.
In recent years, SCR technology is acknowledged as power plants gas denitrifying technology because of technology maturation, denitration efficiency height
In mainstream technology.In current SCR denitration technology, reducing agent mainly has three kinds：Liquefied ammonia, ammoniacal liquor and urea.Although liquefied ammonia exists
Investment and the convenient advantage, but in terms of security again of economy, apply especially in city and have very big obstacle；Urea is made
For reducing agent, its complex process and urea operating cost are high；And ammoniacal liquor is readily transported and safe, in SCR denitration technique
The middle first choice as reducing agent.
The ammoniacal liquor denitrating technique flow that generally uses of the country for：Ammoniacal liquor-electrical heating vaporising device-ammonia-spraying grid, this technique
Operationally not only electric heater is fragile and high energy consumption, therefore how energy-saving denitration turns into pendulum before us in the urgent need to solution
Certainly the problem of.
Utility model content
The problem of in order to overcome electric heater rapid wear in existing SCR denitration technology, reduce denitrating system operating cost, this reality
With a kind of ammoniacal liquor denitration energy saver of new offer, the Btu utilization of high-temperature flue gas is realized, electric heating system is efficiently solved
The problem of energy consumption is big, operating cost is high.Provided with high-efficiency atomizing nozzle and gasification groove in ammoniacal liquor evaporator, ammonia spirit is inversely sprayed into
In hot-air, ammoniacal liquor gasification efficiency is improved.
In order to solve the above technical problems, this using the new technical scheme used for：A kind of ammoniacal liquor denitration energy saver, bag
Dilution air, gas-gas heat exchanger, ammoniacal liquor evaporator and ammonia-spraying grid are included, dilution air is arranged on the air inlet of gas-gas heat exchanger,
The gas outlet of gas-gas heat exchanger is connected to the bottom of ammoniacal liquor evaporator, the sidepiece of ammoniacal liquor evaporator and the outlet of ammonium hydroxide delivery pump
Road is connected, and the inlet pipeline of ammonium hydroxide delivery pump is installed on the bottom of tank used for storing ammonia, and the top of ammoniacal liquor evaporator is connected to ammonia through pipeline
Spray the sidepiece of grid；The flue of boiler is connected through gas-gas heat exchanger with ammonia injection grid, and ammonia injection grid and denitration are anti-
Device is answered to be connected.
In such scheme, provided with atomizer and ammoniacal liquor gasification groove in the ammoniacal liquor evaporator, atomizer is arranged in ammonia
The middle and upper part of water evaporimeter, ammoniacal liquor gasification groove is arranged in the middle and lower part of ammoniacal liquor evaporator.
In such scheme, the ammoniacal liquor gasification groove is poroid ridge type structure.
In such scheme, metering module is provided between the ammonium hydroxide delivery pump and atomizer, the metering module is utilized
To adjust the straying quatity of ammoniacal liquor in ammoniacal liquor evaporator.
In such scheme, the gas-gas heat exchanger material is corrosion-proof wear-resistant material.
In such scheme, bypath system is provided with the export pipeline of the gas-gas heat exchanger, ammoniacal liquor is entered by regulation
The dilution wind regulating valve and bypass valve of evaporator come control into the ammonia-spraying grid ammonia/air gas mixture temperature
Degree.
The beneficial effects of the utility model are：（1）Gas-gas heat exchanger is set to form sky in denitration reactor inlet flue
Gas heating unit, because the air quantity of diluent air is very small relative to exhaust gas volumn, diluent air temperature rise is very easy to, and to flue gas
Heat waste almost ignore.After diluent air is heated through the gas-gas heat exchanger, a point two-way respectively enters the ammonia evaporation
In the export pipeline of device and the ammonia evaporator, the heat of boiler smoke is effectively utilized, electric heater work damage is reduced
Consumption, realizes energy-saving target, reduces station service power consumption rate.（2）This ammoniacal liquor evaporator preferred arrangement high-efficiency atomizing nozzle and
Gasify groove, and 20% ~ 30% ammoniacal liquor is sprayed into ammoniacal liquor evaporator through high-efficiency atomizing nozzle, with high temperature dilution wind in gasification groove it is reverse
Fully gasification mixing, it is ensured that the distributing homogeneity of mixed gas.（3）By adjust high temperature dilution wind into ammoniacal liquor evaporator with
Air quantity in ammoniacal liquor evaporator outlet pipeline, efficiently controls the temperature into gaseous mixture in ammonia-spraying grid.（4）This technology
Simple system, easy to operate, operating cost are low, maintenance is small, can run steadily in the long term.
Brief description of the drawings
In order that content of the present utility model is easier to be clearly understood, below according to specific embodiment and with reference to attached
Figure, is described in further detail to the utility model.
Fig. 1 is ammoniacal liquor denitration energy saver structural representation of the present utility model.
Fig. 2 is the structural representation of the gasification groove in Fig. 1.
In figure：1. tank used for storing ammonia；2. ammonium hydroxide delivery pump；3. ammoniacal liquor evaporator；4. atomizer；5. gasify groove；6. boiler；
7. dilution air；8. gas-gas heat exchanger；9. spray grid；10. Benitration reactor；11. flue gas after denitration.
Embodiment
See Fig. 1, ammoniacal liquor denitrification apparatus of the present utility model includes dilution air 7, gas-gas heat exchanger 8, the and of ammoniacal liquor evaporator 3
Ammonia-spraying grid 9, dilution air 7 is arranged on the air inlet of gas-gas heat exchanger 8, and the gas outlet of gas-gas heat exchanger 8 is connected to ammoniacal liquor steaming
The bottom of device 3 is sent out, the side of ammoniacal liquor evaporator 3 is connected with the outlet conduit of aqua ammonia pump 2, and the inlet pipeline of aqua ammonia pump 2 is installed on
The bottom of tank used for storing ammonia 1, the top of ammoniacal liquor evaporator 3 is connected to the sidepiece that ammonia sprays grid 9 through pipeline；The flue gas of boiler 6 is through gas gas
Enter ammonia after heat exchanger 8 and spray grid 9, finally carry ammonia anti-from denitration into flue gas 11 after the final denitration of Benitration reactor 10
Device 10 is answered to discharge.
The structure setting of the ammonia evaporator 3 is：In the ammoniacal liquor evaporator 3, provided with high-efficiency atomizing nozzle 4 and ammonia
Water groove 5；Atomizer 4 is arranged in middle and upper part, and ammoniacal liquor gasification groove 5 is arranged in middle and lower part, makes 20% ~ 30% ammonia spirit
Sprayed into by atomizer 4 from the middle and upper part of ammoniacal liquor evaporator 3, the high temperature air is introduced simultaneously from the bottom of ammoniacal liquor evaporator 3
Flow from bottom to top, the ammoniacal liquor is inversely mixed and be gasificated into 5% ammonia on ammoniacal liquor gasification groove 5 with high-temperature gas.
Metering module is provided between ammonium hydroxide delivery pump 2 and atomizer 4, ammoniacal liquor in ammoniacal liquor evaporator 3 is adjusted using the metering module
Straying quatity.The ammoniacal liquor gasification groove 5 is to be provided with uniform aperture on poroid ridge type structure, ridge, sees Fig. 2.This structure makes not
The ammoniacal liquor that can gasify gasifies again in gasification groove 5, while can also make the high temperature dilution air point into the ammoniacal liquor evaporator 3
Cloth is uniform.
The gas-gas heat exchanger 8 is arranged in the gas approach of Benitration reactor 10 and forms air-heating unit.The gas gas
Bypath system is provided with the outlet dilution air pipe line of heat exchanger 8, the dilution wind regulating valve of ammoniacal liquor evaporator 3 is entered by adjusting
And bypass valve, ammonia/air gas mixture into the ammonia-spraying grid 9 is reached design temperature, to make SCR system
High temperature air demand reaches active balance with vaporization ability, and meets the safe design requirement of ammonia/air mixture.
Particular embodiments described above, has carried out entering one to the purpose of this utility model, technical scheme and beneficial effect
Step is described in detail, be should be understood that and be the foregoing is only specific embodiment of the utility model, is not limited to this
Utility model, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvements done etc. all should be wrapped
It is contained within protection domain of the present utility model.
Claims (6)
1. a kind of ammoniacal liquor denitration energy saver, it is characterised in that including dilution air（7）, gas-gas heat exchanger（8）, ammoniacal liquor evaporation
Device（3）And ammonia-spraying grid（9）, dilution air（7）Installed in gas-gas heat exchanger（8）Air inlet, gas-gas heat exchanger（8）Outlet
Mouth is connected to ammoniacal liquor evaporator（3）Bottom, ammoniacal liquor evaporator（3）Sidepiece and ammonium hydroxide delivery pump（2）Outlet conduit be connected,
Ammonium hydroxide delivery pump（2）Inlet pipeline be installed on tank used for storing ammonia（1）Bottom, ammoniacal liquor evaporator（3）Top be connected to through pipeline
Ammonia sprays grid（9）Sidepiece；Boiler（6）Flue through gas-gas heat exchanger（8）Grid is sprayed with ammonia（9）It is connected, ammonia spray
Penetrate grid（9）With Benitration reactor（10）It is connected.
2. a kind of ammoniacal liquor denitration energy saver according to claim 1, it is characterised in that the ammoniacal liquor evaporator（3）It is interior
Provided with atomizer（4）With ammoniacal liquor gasification groove（5）, atomizer（4）It is arranged in ammoniacal liquor evaporator（3）Middle and upper part, ammoniacal liquor gas
Change groove（5）It is arranged in ammoniacal liquor evaporator（3）Middle and lower part.
3. a kind of ammoniacal liquor denitration energy saver according to claim 2, it is characterised in that the ammoniacal liquor gasification groove（5）For
Poroid ridge type structure.
4. a kind of ammoniacal liquor denitration energy saver according to claim 2, it is characterised in that the ammonium hydroxide delivery pump（2）With
Atomizer（4）Between be provided with metering module, the straying quatity of ammoniacal liquor in ammoniacal liquor evaporator is adjusted using the metering module.
5. a kind of ammoniacal liquor denitration energy saver according to claim 1, it is characterised in that the gas-gas heat exchanger（8）Material
Matter is corrosion-proof wear-resistant material.
6. a kind of ammoniacal liquor denitration energy saver according to claim 5, it is characterised in that the gas-gas heat exchanger（8）'s
Bypath system is provided with export pipeline, is controlled by adjusting dilution wind regulating valve and bypass valve into ammoniacal liquor evaporator
System enters the ammonia-spraying grid（9）Ammonia/air gas mixture temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720000582.2U CN206454478U (en) | 2017-01-03 | 2017-01-03 | A kind of ammoniacal liquor denitration energy saver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720000582.2U CN206454478U (en) | 2017-01-03 | 2017-01-03 | A kind of ammoniacal liquor denitration energy saver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206454478U true CN206454478U (en) | 2017-09-01 |
Family
ID=59698082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720000582.2U Expired - Fee Related CN206454478U (en) | 2017-01-03 | 2017-01-03 | A kind of ammoniacal liquor denitration energy saver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206454478U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111167307A (en) * | 2020-01-16 | 2020-05-19 | 东莞市应天环保工程有限公司 | High-temperature dust removal and denitration system and method |
-
2017
- 2017-01-03 CN CN201720000582.2U patent/CN206454478U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111167307A (en) * | 2020-01-16 | 2020-05-19 | 东莞市应天环保工程有限公司 | High-temperature dust removal and denitration system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207713416U (en) | Fire coal boiler fume SCR denitration device urea depth hydrolysis' ammonia system | |
| CN105498532A (en) | Automatic control SCR flue gas denitrification urea pyrolysis system | |
| CN205235766U (en) | Automatic control SCR flue gas denitration urea pyrolysis system | |
| CN107448962A (en) | A kind of outer denitrating technique system of chain furnace high/low temperature flue gas holding furnace | |
| CN102794106A (en) | Method and device for spraying reducing agent used for selective catalytic reduction (SCR) of NOx | |
| CN202527072U (en) | Selective catalytic reduction (SCR) smoke denitration device based on urea solutions or ammonia water | |
| CN202844886U (en) | Direct ammonia water injection type flue gas denitration device for waste heat boiler | |
| CN208406637U (en) | A kind of hydrolysis of urea denitrating system ammonia-gas spraying device heating dilution wind | |
| CN203648364U (en) | Coal-fired boiler flue gas denitration system | |
| CN207081021U (en) | A kind of outer denitrating technique system of chain furnace high/low temperature flue gas holding furnace | |
| CN210522209U (en) | Device for vaporizing ammonia water by low-temperature flue gas | |
| CN206454478U (en) | A kind of ammoniacal liquor denitration energy saver | |
| CN201454383U (en) | Flue gas denitration device for preparing ammonia by dry pyrolysis of ammonium bicarbonate | |
| CN206082164U (en) | Sled formula fast -assembling flue gas denitration device | |
| CN202762311U (en) | Spraying device for selective catalytic reduction (SCR) denitration reducing agent | |
| CN202207546U (en) | Device for reducing water consumption of wet flue gas desulfurization | |
| CN204684948U (en) | A kind of pyrolysis installation quoted high-temperature flue gas and add thermal denitration urea | |
| CN201719973U (en) | High-efficiency ammonia denitration device | |
| CN209378805U (en) | A kind of distributed denitrating system of low energy consumption | |
| CN104888604A (en) | Tangential cyclone type ammonium hydroxide vaporizer | |
| CN203463156U (en) | Waste heat comprehensive utilization system of gas-steam combined cycle unit | |
| CN206199039U (en) | A kind of denitration ammonia gas for pretreatment system | |
| CN211837273U (en) | Arrange inside urea of combustion engine export flue and directly spout pyrolysis denitrification facility | |
| CN211988034U (en) | Denitration device of gas-steam combined cycle unit with ammonia water as reducing agent | |
| CN204746101U (en) | Tangential cyclone -type aqueous ammonia vaporizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170901 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |