CN206082183U - Hot -blast heating device again of flue gas denitration boiler - Google Patents
Hot -blast heating device again of flue gas denitration boiler Download PDFInfo
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- CN206082183U CN206082183U CN201621041427.7U CN201621041427U CN206082183U CN 206082183 U CN206082183 U CN 206082183U CN 201621041427 U CN201621041427 U CN 201621041427U CN 206082183 U CN206082183 U CN 206082183U
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- flue gas
- hot air
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- heat exchanger
- boiler
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Abstract
The utility model relates to a hot -blast heating device again of flue gas denitration boiler, its characterized in that: include the reactor import flue (2) that is connected with boiler afterbody flue and SCR reactor (8) be connected with reactor import flue, the hot -blast heat exchanger of flue gas / boiler (3) is located to be provided with by reactor import flue (2), it is hot -blast that the hot -blast heat exchanger import of flue gas / boiler lets in the boiler, hot -blast the leading to in evaporimeter (10) of boiler of the hot -blast heat exchanger of flue gas / boiler export output, the import of evaporimeter (10) lets in the aqueous ammonia, the export of evaporimeter (10) lets in the reactor import flue that is located behind the hot -blast heat exchanger of flue gas / boiler (3). The utility model discloses can be when not using electric heater, improve boiler hot air temperature to more than 200 DEG C, the greatly reduced power consumption to effectively reduce the running cost expense.
Description
Technical field：
This utility model is related to a kind of denitrating flue gas boiler hot air reheater, is mainly used in heating the boiler hot of low temperature
Wind, to be used to evaporate ammonia in ammonia vaporizer for ammonia, for removing the nitrogen oxidation in boiler smoke in SCR reactors
Thing.
Background technology：
In selective catalytic reduction（SCR）In denitrating technique, a selection always difficult point of reducing agent.By some liquid
Ammonia reveals the impact of accident, and application of the liquefied ammonia in city has become increasingly limited；Ammonia and carbamide are used as SCR method denitrations
Safer reducing agent has gradually replaced liquefied ammonia.But equal ammonia amount is prepared, the energy consumption needed for urea pyrolysis is about tradition
4～5 times of energy consumption needed for evaporation ammonia, therefore evaporation ammonia ammonia is utilized, become main flow, the power-saving technology of SCR method denitrations.
The hot air source being presently used in ammonia vaporizer is generally prepared using Electric heating, and which needs to consume
Certain energy, denitration operating cost is of a relatively high.
The content of the invention：
The purpose of this utility model is to provide a kind of denitrating flue gas boiler hot air reheater, the hot air heating apparatus
Simple structure, reasonable in design, the hot blast after heating can be introduced directly in vaporizer for evaporating ammonia, be prepared by SCR reactors
Reducing agent ammonia；The process system is relatively easy, energy-saving, is conducive to substantially reducing operating cost.
This utility model denitrating flue gas boiler hot air reheater, it is characterised in that：Including with boiler back end ductwork phase
The Reactor inlet flue of connection and the SCR reactors being connected with Reactor inlet flue, set at the Reactor inlet flue
It is equipped with flue gas/boiler hot air heat exchanger；The flue gas/boiler hot air heat exchanger import is passed through boiler hot air, the flue gas/boiler
The boiler hot air of hot air heat exchanger outlet output leads in vaporizer, and the import of the vaporizer is passed through ammonia, the vaporizer
Outlet be passed through on the Reactor inlet flue after flue gas/boiler hot air heat exchanger.
Above-mentioned flue gas/boiler hot air heat exchanger is tubular heat exchanger, the tubular heat exchanger and Reactor inlet cigarette
The vertical mode of flue gas flow direction is arranged in road.
Above-mentioned flue gas/boiler hot air heat exchanger exit boiler hot air temperature is up to more than 200 DEG C.
Above-mentioned vaporizer is passed through ammonia using two spray guns, and the spray gun is double-current spray gun body.
Above-mentioned Reactor inlet flue is located at the corner of flue and is provided with air-flow even distributor, and the air-flow even distributor is arc
Plus straight panel, plate is along the vertical deflector of airflow direction setting.
Above-mentioned Reactor inlet flue is provided with ammonia-spraying grid, and ammonia-spraying grid is some spray ammonia pipes, is sprayed on ammonia pipe per root
Injection nozzle is laid with, injection nozzle is grating type arrangement.
Above-mentioned SCR reactors are provided with commutator with the junction of Reactor inlet flue, and the commutator is interlocked by transverse and longitudinal
Vertical grid sheet constitute, be provided with slope near the input port of commutator.
If being provided with dried layer catalyst layer in above-mentioned SCR reactors.
The operation principle of this utility model denitrating flue gas boiler hot air reheater, operationally, compared with low temperature boiler hot
Wind draws access heat exchanger 3, after heating up with flue gas heat exchange in heat exchanger 3, draws and is connected to the thermal source that vaporizer evaporates as ammonia, by
Spray gun 9 is introduced into the ammonia in vaporizer 10, evaporates in the presence of the thermal source, and the ammonia after evaporation/hot blast gaseous mixture is by spray
Ammonia grid 5 sprays into Reactor inlet flue, and entering back into SCR reactors carries out denitration reaction.The technique is without using electrical heating
During device, boiler hot air temperature is improved to more than 200 DEG C, energy consumption is substantially reduced, so as to effectively reduce operating cost expense；And to pot
The impact very little of kiln gas temperature, impact is nearly free from boiler thermal output.
Description of the drawings：
Fig. 1 is the technique total figure in embodiment；
Fig. 2 is the side view of flue gas in embodiment/boiler hot air heat exchanger；
Fig. 3 is A-A profiles in embodiment；
Fig. 4 is B-B profiles in embodiment；
Fig. 5 is C-C profiles in embodiment；
In figure：1-boiler back end ductwork, 2-Reactor inlet, 3-flue gas of flue/boiler hot air heat exchanger 4-
9-spray gun of air-flow even distributor 5-ammonia-spraying grid, 6-commutator, 7-catalyst layer, 8-SCR reactors 10-
The pipeline of vaporizer 11- tubular heat exchangers.
Specific embodiment：
This utility model denitrating flue gas boiler hot air reheater, including the reaction being connected with boiler back end ductwork 1
Device inlet flue duct 2 and the SCR reactors 8 being connected with Reactor inlet flue 2, at the Reactor inlet flue 2 cigarette is provided with
Gas/boiler hot air heat exchanger 3.
In order to improve heat transfer effect, above-mentioned flue gas/boiler hot air heat exchanger 3 is tubular heat exchanger, and the shell and tube is changed
The pipeline 11 of the hot device mode vertical with flue gas flow direction in Reactor inlet flue 2 is arranged.
In order to ammonia can evaporating completely, above-mentioned flue gas/boiler hot air heat exchanger 3 exports boiler hot air temperature up to 200
More than DEG C.
In order to preferably implement this utility model, above-mentioned flue gas/outlet boiler hot air of boiler hot air heat exchanger 3 is passed through evaporation
In device 10, two spray guns 9 are set, the spray gun 9 is double-current spray gun body on the vaporizer 10.
In order that flue gas even distribution effect is more preferably, it is equal that above-mentioned Reactor inlet flue 2 is provided with air-flow positioned at the corner of flue
Cloth device 4, the air-flow even distributor 4 adds straight panel, plate to arrange vertical deflector along airflow direction for arc.
For further uniform flue gas, above-mentioned SCR reactors 8 are provided with commutator with the junction of Reactor inlet flue 2
6, vertical grid sheet of the commutator 6 by transverse and longitudinal staggeredly is constituted, and in the input port near commutator 6 slope is provided with.
In order to preferably implement this utility model, above-mentioned Reactor inlet flue 2 is provided with ammonia-spraying grid 5, ammonia-spraying grid 5
For some spray ammonia pipes, spray per root and injection nozzle is laid with ammonia pipe, injection nozzle is grating type arrangement.Between injection nozzle
Spacing between spacing and spray ammonia pipe can be with identical.
In order to preferably implement this utility model, if being provided with dried layer catalyst layer 7 in above-mentioned SCR reactors 8.
In order to improve heat-conducting effect, the area of section of the pipeline 11 of tubular heat exchanger can account for the five of flue cross section area
/ tri-, the arrival end of the pipeline 11 for passing through tubular heat exchanger in boiler hot air is provided with blower fan, or pipeline 11 can be designed
Big into inlet diameter, outlet diameter is little.
The operation principle of this utility model denitrating flue gas boiler hot air reheater, operationally, compared with low temperature boiler hot
Wind draws access heat exchanger 3, after heating up with flue gas heat exchange in heat exchanger 3, draws and is connected to the thermal source that vaporizer evaporates as ammonia, by
Spray gun 9 is introduced into the ammonia in vaporizer 10, evaporates in the presence of the thermal source, and the ammonia after evaporation/hot blast gaseous mixture is by spray
Ammonia grid 5 sprays into Reactor inlet flue, and entering back into SCR reactors carries out denitration reaction.The technique is without using electrical heating
During device, boiler hot air temperature is improved to more than 200 DEG C, energy consumption is substantially reduced, so as to effectively reduce operating cost expense；And to pot
The impact very little of kiln gas temperature, impact is nearly free from boiler thermal output.
The foregoing is only preferred embodiment of the present utility model, it is all according to this utility model claim done it is equal
Deng change and modification, should all belong to covering scope of the present utility model.
Claims (8)
1. a kind of denitrating flue gas boiler hot air reheater, it is characterised in that：It is anti-including what is be connected with boiler back end ductwork
Answer device inlet flue duct（2）And the SCR reactors being connected with Reactor inlet flue（8）, the Reactor inlet flue（2）Place sets
It is equipped with flue gas/boiler hot air heat exchanger（3）；The flue gas/boiler hot air heat exchanger import is passed through boiler hot air, and the flue gas/
The boiler hot air of boiler hot air heat exchanger exit output leads to vaporizer（10）It is interior, the vaporizer（10）Import be passed through ammonia
Water, the vaporizer（10）Outlet be passed through positioned at flue gas/boiler hot air heat exchanger（3）On Reactor inlet flue afterwards.
2. denitrating flue gas boiler hot air reheater according to claim 1, it is characterised in that：Flue gas/the boiler
Hot air heat exchanger is tubular heat exchanger, the pipeline of the tubular heat exchanger（11）With Reactor inlet flue（2）Interior flue gas
Flow to vertical mode to arrange.
3. denitrating flue gas boiler hot air reheater according to claim 1, it is characterised in that：Flue gas/the boiler
Hot air heat exchanger（3）Outlet boiler hot air temperature is up to more than 200 DEG C.
4. denitrating flue gas boiler hot air reheater according to claim 1, it is characterised in that：The vaporizer（10）
Ammonia is passed through using two spray guns（9）, the spray gun is double-current spray gun body.
5. denitrating flue gas boiler hot air reheater according to claim 1, it is characterised in that：The Reactor inlet
Flue is located at the corner of flue and is provided with air-flow even distributor（4）, the air-flow even distributor（4）For arc plus straight panel, plate is along air-flow
Direction arranges vertical deflector.
6. denitrating flue gas boiler hot air reheater according to claim 1, it is characterised in that：The Reactor inlet
Flue is provided with ammonia-spraying grid（5）, ammonia-spraying grid is some spray ammonia pipes, sprays per root on ammonia pipe and is laid with injection nozzle, is sprayed
Nozzle is grating type arrangement.
7. denitrating flue gas boiler hot air reheater according to claim 1, it is characterised in that：The SCR reactors
Commutator is provided with the junction of Reactor inlet flue（6）, vertical grid sheet of the commutator by transverse and longitudinal staggeredly constitute,
Input port near commutator is provided with slope.
8. denitrating flue gas boiler hot air reheater according to claim 1, it is characterised in that：The SCR reactors
If being inside provided with dried layer catalyst layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621041427.7U CN206082183U (en) | 2016-09-07 | 2016-09-07 | Hot -blast heating device again of flue gas denitration boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621041427.7U CN206082183U (en) | 2016-09-07 | 2016-09-07 | Hot -blast heating device again of flue gas denitration boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206082183U true CN206082183U (en) | 2017-04-12 |
Family
ID=58476048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621041427.7U Active CN206082183U (en) | 2016-09-07 | 2016-09-07 | Hot -blast heating device again of flue gas denitration boiler |
Country Status (1)
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| CN (1) | CN206082183U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107158948A (en) * | 2017-06-12 | 2017-09-15 | 盐城诚达环保工程有限公司 | Denitrification reducing agent gas ammonia is produced and denitrating flue gas integrated apparatus |
| CN107198965A (en) * | 2017-07-12 | 2017-09-26 | 江苏峰业科技环保集团股份有限公司 | A kind of method that utilization SCR technology handles low temperature waste gas |
| CN108579375A (en) * | 2018-06-20 | 2018-09-28 | 山东国舜建设集团有限公司 | Sintering device flue gas is heated cooperates with denitrification apparatus and method of denitration with ammonia mixing and SNCR |
| CN109381997A (en) * | 2018-11-06 | 2019-02-26 | 清华大学 | A kind of flue gas temperature adjustment gametic fertility integral system |
| CN115518515A (en) * | 2022-09-14 | 2022-12-27 | 山东莱钢永锋钢铁有限公司 | Coal-fired boiler denitration system improvement method |
-
2016
- 2016-09-07 CN CN201621041427.7U patent/CN206082183U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107158948A (en) * | 2017-06-12 | 2017-09-15 | 盐城诚达环保工程有限公司 | Denitrification reducing agent gas ammonia is produced and denitrating flue gas integrated apparatus |
| CN107198965A (en) * | 2017-07-12 | 2017-09-26 | 江苏峰业科技环保集团股份有限公司 | A kind of method that utilization SCR technology handles low temperature waste gas |
| CN108579375A (en) * | 2018-06-20 | 2018-09-28 | 山东国舜建设集团有限公司 | Sintering device flue gas is heated cooperates with denitrification apparatus and method of denitration with ammonia mixing and SNCR |
| CN109381997A (en) * | 2018-11-06 | 2019-02-26 | 清华大学 | A kind of flue gas temperature adjustment gametic fertility integral system |
| CN115518515A (en) * | 2022-09-14 | 2022-12-27 | 山东莱钢永锋钢铁有限公司 | Coal-fired boiler denitration system improvement method |
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