CN205760637U - The anti-blocking system of the air preheater of ammonia process SCR denitration unit - Google Patents
The anti-blocking system of the air preheater of ammonia process SCR denitration unit Download PDFInfo
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- CN205760637U CN205760637U CN201620329896.2U CN201620329896U CN205760637U CN 205760637 U CN205760637 U CN 205760637U CN 201620329896 U CN201620329896 U CN 201620329896U CN 205760637 U CN205760637 U CN 205760637U
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- playpipe
- air preheater
- ammonia
- tank
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Abstract
This utility model relates to the anti-blocking system of the air preheater of a kind of ammonia process SCR denitration unit, ammonia process SCR denitration unit includes liquefied ammonia storage tank, liquefied ammonia evaporator tank, ammonia surge tank, blender, dilution air and Benitration reactor, it is provided with alkaline absorbent spraying system and condenses water rinse-system, alkaline absorbent spraying system is provided with alkaline absorbent bucket, delivery pump, conveying pipe and playpipe, condense water rinse-system and be provided with water tank, elevator pump, flush pipe and delivery pipe, alkaline absorbent spraying system is by alkaline adsorbent and the SO in flue gas3Reaction, avoid the formation of ammonium hydrogen sulfate, reach to prevent the purpose of air preheater blocking, condense the condensation water formed after water rinse-system mainly uses afterheat steam produced by steam turbine condensed and processes, by promoting condensation water, air preheater is carried out online high pressure rinse, reach to prevent the purpose of air preheater blocking, flushing process does not affect the properly functioning of unit.
Description
Technical field
This utility model relates to denitration of boiler smoke technology, particularly relates to the air in a kind of ammonia process SCR denitration unit pre-
The anti-blocking technology of hot device.
Background technology
Denitrating system must be installed by coal-burning power plant, could meet the requirement of effluent standard.In denitrating technique, selectivity is urged
Change reducing process (SCR) because of simple in construction, denitration efficiency is high, reliable, technology is more ripe etc., and advantage extensively should in coal-burning power plant
With.But along with the operation of denitrating system, blocking and the etching problem of air preheater also can not be ignored.
The air preheater in thermal power plant is the important component part of boiler, is a kind of heat utilizing flue gas heat to heat
Switching equipment, is positioned at the afterbody of boiler vertical convection flue.
SO present in flue gas2It is oxidized to SO by denitrating catalyst3.In the medium/low temperature section of air preheater, SCR exports cigarette
Escape ammonia in gas, SO3With steam generation chemical reaction, generate viscosity is big, corrosivity is strong ammonium sulphate and hydrogen sulfate ammonia.Warp
Overtesting is analyzed, and air preheater blocking is mainly caused by the deposition of liquid sulfuric acid hydrogen ammonium.
Improvement air preheater blocks, and general measure includes increasing air preheater cold-end air height, using permeability
Preferably in heat storage plate wave mode, reduction boiler sootblowing steam, moisture carries, mixes burning low-sulfur coal etc., all can not thoroughly administer air preheater
Blocking.
Because above-mentioned defect, the design people, the most in addition research and innovation, can not only pre-liquid-proof to founding one
State ammonium hydrogen sulfate formation of deposits, and the device deposit formed can removed, thus reach thoroughly to prevent air preheat
The purpose of device blocking.
Utility model content
For solving above-mentioned technical problem, the air that the purpose of this utility model is to provide a kind of ammonia process SCR denitration unit is pre-
The anti-blocking system of hot device, can not only effectively prevent liquid sulfuric acid hydrogen ammonium formation of deposits, and can be by air preheater
Deposit is removed, thus reaches the purpose thoroughly preventing air preheater from blocking.
The anti-blocking system of the air preheater of a kind of ammonia process SCR denitration unit of the present utility model, described ammonia process SCR denitration
Unit includes liquefied ammonia storage tank, liquefied ammonia evaporator tank, ammonia surge tank, blender, dilution air and Benitration reactor, described liquid
Ammonia storage tank connects described liquefied ammonia evaporator tank by pipeline, and described liquefied ammonia evaporator tank connects described ammonia surge tank by pipeline,
Described ammonia surge tank connects the ammonia import of described blender by pipeline, and described dilution air connects described mixed by pipeline
The air intlet of clutch, the flue of boiler is provided with economizer and air preheater, and described economizer is positioned at the head of described flue
End, described air preheater is positioned at the tail end of described flue, and described Benitration reactor is positioned at the stage casing of described flue, described mixing
The flue pipeline section that the outlet of device is connected between described economizer and described Benitration reactor by pipeline, is provided with alkaline absorbent
Spraying system and water rinse-system, described alkaline absorbent spraying system is provided with alkaline absorbent bucket, delivery pump, conveying pipe
And playpipe, described playpipe is installed in described flue, and described playpipe is provided with shower nozzle, described alkaline absorbent bucket
Being connected by described conveying pipe with between described playpipe, described delivery pump is installed on described conveying pipe, described water rinse-system
Being provided with water tank, elevator pump, flush pipe sedimentation tank, filter and delivery pipe, the water inlet of described water tank connects municipal administration water inlet pipe, institute
The outlet stating water tank connects described flush pipe, and described flush pipe passes to the heat storage plate of described air preheater, described elevator pump
Being installed in described flush pipe, the discharge outlet of described air preheater connects described delivery pipe, and described delivery pipe connects described heavy
Pond, shallow lake, described sedimentation tank connects described filter, and the water outlet of described filter connects municipal administration blow-off line.
Further, described playpipe is provided with three groups and the respectively first playpipe, the second playpipe and the 3rd playpipe,
Before described first playpipe is installed on the import of described Benitration reactor, described second playpipe is installed on described denitration reaction
After the outlet of device, described 3rd playpipe is installed on the outlet of described air preheater.
Further, being provided with the first arm, the second arm and the 3rd arm, described first playpipe passes through described first
Pipe connects described conveying pipe, and described second playpipe connects described conveying pipe, described 3rd playpipe by described second arm
Described conveying pipe is connected by described 3rd arm.
Further, described conveying pipe is provided with electromagnetic valve.
Further, the water inlet of described water tank is provided with entering water electromagnetic valve, is provided with liquid level sensor in described water tank, described
The signal of liquid level sensor controls the keying of described entering water electromagnetic valve.
Further, described sedimentation tank has sludge outlet, and described sludge outlet connects pressure filter by sludge pipe.
By such scheme, this utility model at least has the advantage that ammonia process SCR denitration unit of the present utility model
The anti-blocking system of air preheater is provided with alkaline absorbent spraying system and water rinse-system, alkaline absorbent spraying system master
To be made up of alkaline absorbent bucket, delivery pump, conveying pipe and playpipe, by alkaline adsorbent and the SO in flue gas3Instead
Should, it is to avoid the formation of ammonium hydrogen sulfate, reach to prevent the purpose of air preheater blocking, water rinse-system mainly passes through water under high pressure
In time the deposit in air preheater is washed out, reach to prevent the purpose of air preheater blocking, and the water outlet after flushing
It is emitted in municipal wastewater pipe network after precipitation and filtration, environmentally safe.This utility model is sprayed by alkaline absorbent
Penetrate system and water rinse-system reaches the purpose of thoroughly preventing air preheater to block.
Described above is only the general introduction of technical solutions of the utility model, in order to better understand skill of the present utility model
Art means, and can being practiced according to the content of description, below with preferred embodiment of the present utility model and coordinate accompanying drawing detailed
Describe in detail bright as after.
Accompanying drawing explanation
Fig. 1 is principle schematic of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment, detailed description of the invention of the present utility model is described in further detail.Below
Embodiment is used for illustrating this utility model, but is not limited to scope of the present utility model.
See Fig. 1, the air preheater of a kind of ammonia process SCR denitration unit described in this utility model one preferred embodiment
Anti-blocking system, described ammonia process SCR denitration unit include liquefied ammonia storage tank 1, liquefied ammonia evaporator tank 2, ammonia surge tank 3, blender 4,
Dilution air 5 and Benitration reactor 6, described liquefied ammonia storage tank connects described liquefied ammonia evaporator tank by pipeline, and described liquefied ammonia evaporates
Groove connects described ammonia surge tank by pipeline, and described ammonia surge tank connects the ammonia import of described blender by pipeline,
Described dilution air connects the air intlet of described blender by pipeline, and the flue 8 of boiler 7 is provided with economizer 9 and air
Preheater 10, described economizer is positioned at the head end of described flue, and described air preheater is positioned at the tail end of described flue, described de-
Nitre reactor is positioned at the stage casing of described flue, and the outlet of described blender is connected to described economizer and described denitration by pipeline
Flue pipeline section between reactor, is provided with alkaline absorbent spraying system and water rinse-system, and the injection of described alkaline absorbent is
System is provided with alkaline absorbent bucket 11, delivery pump 12, conveying pipe 13 and playpipe, and described playpipe is installed on described flue
In, described playpipe is provided with shower nozzle, by described conveying Guan Lian between described alkaline absorbent bucket and described playpipe
Connecing, described delivery pump is installed on described conveying pipe, and described water rinse-system is provided with water tank 21, elevator pump 22, flush pipe 23, precipitation
Pond 24, filter 25 and delivery pipe 26, the water inlet of described water tank connects municipal administration water inlet pipe, and the outlet of described water tank connects
Described flush pipe, described flush pipe passes to the heat storage plate of described air preheater, and described elevator pump is installed in described flush pipe,
The discharge outlet of described air preheater connects described delivery pipe, and described delivery pipe connects described sedimentation tank, and described sedimentation tank connects
Described filter, the water outlet of described filter connects municipal administration blow-off line.
Described playpipe is provided with three groups and the respectively first playpipe the 14, second playpipe 15 and the 3rd playpipe 16, institute
Before stating the import that the first playpipe is installed on described Benitration reactor, described second playpipe is installed on described Benitration reactor
Outlet after, described 3rd playpipe is installed on the outlet of described air preheater.It is provided with first arm the 17, second arm 18
With the 3rd arm 19, described first playpipe connects described conveying pipe by described first arm, and described second playpipe passes through
Described second arm connects described conveying pipe, and described 3rd playpipe connects described conveying pipe by described 3rd arm.Described
Conveying pipe is provided with electromagnetic valve 20.
The water inlet of described water tank is provided with entering water electromagnetic valve, is provided with liquid level sensor, described level sensing in described water tank
The signal of device controls the keying of described entering water electromagnetic valve.
Described sedimentation tank has sludge outlet, and described sludge outlet connects pressure filter 27 by sludge pipe.
Operation principle of the present utility model is as follows: described alkaline absorbent spraying system, injects alkaline adsorption in flue
Agent, makes alkaline adsorbent and the SO in flue gas3Reaction, it is to avoid the formation of ammonium hydrogen sulfate, reaches to prevent air preheater blocking
Purpose.The optimal entry position of alkaline adsorbent makes in the exit of air preheater and the import of Benitration reactor and goes out
At Kou.Deposit in air preheater is mainly washed out in time by described water rinse-system by water under high pressure, reaches prevention
The purpose of air preheater blocking, and the water outlet after flushing is through precipitating and being emitted in municipal wastewater pipe network, to ring after filtration
Border is pollution-free.
The above is only preferred implementation of the present utility model, is not limited to this utility model, it is noted that
For those skilled in the art, on the premise of without departing from this utility model know-why, it is also possible to do
Going out some improvement and modification, these improve and modification also should be regarded as protection domain of the present utility model.
Claims (6)
1. the anti-blocking system of the air preheater of an ammonia process SCR denitration unit, it is characterised in that: described ammonia process SCR denitration machine
Group includes that liquefied ammonia storage tank (1), liquefied ammonia evaporator tank (2), ammonia surge tank (3), blender (4), dilution air (5) and denitration are anti-
Answering device (6), described liquefied ammonia storage tank connects described liquefied ammonia evaporator tank by pipeline, and described liquefied ammonia evaporator tank connects institute by pipeline
Stating ammonia surge tank, described ammonia surge tank connects the ammonia import of described blender by pipeline, and described dilution air passes through
Pipeline connects the air intlet of described blender, and the flue (8) of boiler (7) is provided with economizer (9) and air preheater (10),
Described economizer is positioned at the head end of described flue, and described air preheater is positioned at the tail end of described flue, described Benitration reactor
Be positioned at the stage casing of described flue, the outlet of described blender by pipeline be connected to described economizer and described Benitration reactor it
Between flue pipeline section, be provided with alkaline absorbent spraying system and water rinse-system, described alkaline absorbent spraying system is provided with alkali
Property absorbent bucket (11), delivery pump (12), conveying pipe (13) and playpipe, described playpipe is installed in described flue,
Described playpipe is provided with shower nozzle, is connected by described conveying pipe between described alkaline absorbent bucket and described playpipe,
Described delivery pump be installed on described conveying pipe, described water rinse-system be provided with water tank (21), elevator pump (22), flush pipe (23),
Sedimentation tank (24), filter (25) and delivery pipe (26), the water inlet of described water tank connects municipal administration water inlet pipe, going out of described water tank
The mouth of a river connects described flush pipe, and described flush pipe passes to the heat storage plate of described air preheater, and described elevator pump is installed on described
In flush pipe, the discharge outlet of described air preheater connects described delivery pipe, and described delivery pipe connects described sedimentation tank, described heavy
Pond, shallow lake connects described filter, and the water outlet of described filter connects municipal administration blow-off line.
The anti-blocking system of the air preheater of ammonia process SCR denitration unit the most according to claim 1, it is characterised in that: institute
State playpipe and be provided with three groups and the respectively first playpipe (14), the second playpipe (15) and the 3rd playpipe (16), described
Before one playpipe is installed on the import of described Benitration reactor, described second playpipe is installed on going out of described Benitration reactor
After Kou, described 3rd playpipe is installed on the outlet of described air preheater.
The anti-blocking system of the air preheater of ammonia process SCR denitration unit the most according to claim 2, it is characterised in that: set
Having the first arm (17), the second arm (18) and the 3rd arm (19), described first playpipe is connected by described first arm
Described conveying pipe, described second playpipe connects described conveying pipe by described second arm, and described 3rd playpipe passes through institute
State the 3rd arm and connect described conveying pipe.
The anti-blocking system of the air preheater of ammonia process SCR denitration unit the most according to claim 1, it is characterised in that: institute
State conveying pipe and be provided with electromagnetic valve (20).
The anti-blocking system of the air preheater of ammonia process SCR denitration unit the most according to claim 1, it is characterised in that: institute
The water inlet stating water tank is provided with entering water electromagnetic valve, is provided with liquid level sensor in described water tank, the signal control of described liquid level sensor
Make the keying of described entering water electromagnetic valve.
The anti-blocking system of the air preheater of ammonia process SCR denitration unit the most according to claim 1, it is characterised in that: institute
Stating sedimentation tank and have sludge outlet, described sludge outlet connects pressure filter (27) by sludge pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620329896.2U CN205760637U (en) | 2016-04-19 | 2016-04-19 | The anti-blocking system of the air preheater of ammonia process SCR denitration unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620329896.2U CN205760637U (en) | 2016-04-19 | 2016-04-19 | The anti-blocking system of the air preheater of ammonia process SCR denitration unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205760637U true CN205760637U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620329896.2U Expired - Fee Related CN205760637U (en) | 2016-04-19 | 2016-04-19 | The anti-blocking system of the air preheater of ammonia process SCR denitration unit |
Country Status (1)
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| CN (1) | CN205760637U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107965787A (en) * | 2017-11-22 | 2018-04-27 | 西安交通大学 | System and method for the classification rotary regenerative air preheater for mitigating ammonium hydrogen sulfate deposition |
| CN113217941A (en) * | 2021-04-19 | 2021-08-06 | 华能铜川照金煤电有限公司 | Air preheater blockage prediction and water-spraying ammonia-spraying optimization anti-blocking method |
| CN113262626A (en) * | 2021-05-17 | 2021-08-17 | 西安交通大学 | System and method for adopting high-temperature ammonia-air mixed gas to atomize alkaline slurry and cooperatively desulfurizing and denitrifying |
-
2016
- 2016-04-19 CN CN201620329896.2U patent/CN205760637U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107965787A (en) * | 2017-11-22 | 2018-04-27 | 西安交通大学 | System and method for the classification rotary regenerative air preheater for mitigating ammonium hydrogen sulfate deposition |
| CN107965787B (en) * | 2017-11-22 | 2019-06-11 | 西安交通大学 | For mitigating the system and method for the classification rotary regenerative air preheater of ammonium hydrogen sulfate deposition |
| CN113217941A (en) * | 2021-04-19 | 2021-08-06 | 华能铜川照金煤电有限公司 | Air preheater blockage prediction and water-spraying ammonia-spraying optimization anti-blocking method |
| CN113262626A (en) * | 2021-05-17 | 2021-08-17 | 西安交通大学 | System and method for adopting high-temperature ammonia-air mixed gas to atomize alkaline slurry and cooperatively desulfurizing and denitrifying |
| CN113262626B (en) * | 2021-05-17 | 2022-06-07 | 西安交通大学 | System and method for adopting high-temperature ammonia-air mixed gas to atomize alkaline slurry and cooperatively desulfurizing and denitrifying |
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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 |
Granted publication date: 20161207 Termination date: 20180419 |
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| CF01 | Termination of patent right due to non-payment of annual fee |