CN207404853U - A kind of denitrating flue gas urea seeding hydrolyzes ammonia system processed - Google Patents
A kind of denitrating flue gas urea seeding hydrolyzes ammonia system processed Download PDFInfo
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- CN207404853U CN207404853U CN201721314141.6U CN201721314141U CN207404853U CN 207404853 U CN207404853 U CN 207404853U CN 201721314141 U CN201721314141 U CN 201721314141U CN 207404853 U CN207404853 U CN 207404853U
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Abstract
The utility model discloses a kind of denitrating flue gas urea seedings to hydrolyze ammonia system processed, including hydrolysis of urea reactor, urea dissolving conveying device and hydrolyst device；The hydrolysis of urea reactor is built-in with tracing steam coil pipe, and hydrolysis of urea reactor connects urea dissolving conveying device and hydrolyst device and is connected with ammonia outlet outside respectively.It is hydrolysis reactor that the denitrating flue gas urea seeding of the utility model, which hydrolyzes ammonia system core equipment processed, using raw material of the urea as ammonia processed, opposite liquefied ammonia and ammonium hydroxide are safe many in the transport of reducing agent, storage and operation, effectively have evaded falling a series of security risks as caused by liquefied ammonia and ammonium hydroxide ammonia.Hydrolysis of urea reactor and the device on periphery are integrated in a whole set of modularized equipment, substantially reduce construction period；Automation control can be achieved and whole system is by the control to temperature, pressure and liquid level in hydrolysis reactor, the accurate control of amonia yield is realized, so as to achieve the purpose that accurately to control NOx.
Description
Technical field
The utility model is related to one kind ammonia system processed is hydrolyzed for denitrating flue gas urea seeding.
Background technology
Flue gas nitrogen oxide emission reduction (abbreviation denitration) technology is to utilize amino-containing denitrification reducing agent, such as liquefied ammonia, urea
Reduction reaction is carried out with the NOx in flue gas, by the NO and NO in flue gas2Change into N2And H2O.The selection one of reducing agent at this stage
As consider in terms of its physical property, economy and security, mainly have three kinds of liquefied ammonia, ammonium hydroxide and urea at present.Due to
Liquefied ammonia is hazardous chemical, and more and more restrictions are had received in all various aspects such as examination ＆ approval, duration, occupation of land using during liquefied ammonia；It is more
Nian Lai, because of improper use, casualty loss is very heavy as caused by liquefied ammonia, and security risk can not be ignored.And ammonium hydroxide contains ammonia because of it
Measure that low, bulky and inconvenient to transport, operating cost is high and that is applied limits to.As non-hazardous feed for ammonia production, urea has
The denitration performance identical with liquefied ammonia, and it is nontoxic, it is safe to use, it is readily transported and stores.Current SCR at home
(Selective Catalytic Reduction, selective catalytic reduction reaction) denitration using urea as reducing agent
As a kind of trend, and mainstream is increasingly becoming, especially in some key areas and the city power station nearer from resident, utilizes urine
Element is particularly important as reducing agent ammonia.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of denitrating flue gas urea seeding hydrolysis system
Ammonia system effectively has evaded falling a series of security risks as caused by liquefied ammonia and ammonium hydroxide ammonia, and realizes that automation is accurate
Control, so as to achieve the purpose that accurately to control NOx, and greatly improves hydrolysis rate, reduces system energy consumption.
To achieve these goals, technical solution is used by the utility model：
A kind of denitrating flue gas urea seeding hydrolyzes ammonia system processed, including at least a hydrolysis of urea reactor, a urea
Dissolve conveying device and a hydrolyst device；The hydrolysis of urea reactor is both ends end socket and is the pressure of tube structure
Force container, the hydrolysis of urea reactor are built-in with tracing steam coil pipe, and the hydrolysis of urea reactor connects urea dissolving respectively
Conveying device and hydrolyst device and ammonia outlet is connected with outside.
As the improvement to above-mentioned technical proposal, the hydrolysis of urea reactor is provided with hydrolysis urea liquid charge door simultaneously
By connecting urea liquid charge pipe outside urea liquid charge door, it is provided with flowmeter on the urea liquid charge pipe and urea is molten
Liquid regulating valve.
As the improvement to above-mentioned technical proposal, it is molten that the urea dissolving conveying device includes the urea being sequentially connected in series
Tank, urea liquid conveyor module urea liquid storage tank, urea liquid pressurized circulation module, urea solution metering module are solved, it is described
Urea solution metering module is connected with urea liquid charge pipe.
As the improvement to above-mentioned technical proposal, the urea dissolving tank is circumscribed with urea warehouse.It is carried for urea dissolving tank
For urea material.
As the improvement to above-mentioned technical proposal, the hydrolyst device includes hydrolyst storage tank, the urine
Plain hydrolysis reactor is provided with hydrolyst charge door, and the hydrolyst storage tank passes through hydrolyst charge door and urine
Plain hydrolysis reactor is connected.
As the improvement to above-mentioned technical proposal, the ammonia outlet connects ammonia delivery pipe and passes through ammonia delivery pipe and connects outside
Ammonia-spraying grid is connect, from ammonia outlet to ammonia-spraying grid import, ammonia regulating valve, ammonia are disposed in the ammonia delivery pipe
Monitoring device, ammonia metering module, static mixer.
As the improvement to above-mentioned technical proposal, the ammonia delivery pipe is also circumscribed with hot-air mixing tube, the hot-air
High-temperature blower is provided on mixing tube and a termination boiler, the ammonia that one end is connected between ammonia metering module and static mixer are defeated
It send on pipe.
As the improvement to above-mentioned technical proposal, one end of the hydrolysis of urea reactor is provided with vapor collection and hydrophobic collection
Case, the vapor collection are provided with saturated vapor import and pass through saturated vapor import steam-out (SO) air inlet pipe and the steam inlet duct
On be provided with steam control valve, be provided with drain valve on the hydrophobic external drain pipe of header and the drain pipe；The urea water
Solution reactor is provided with manhole installing port and installs manhole by manhole installing port, installs manhole, easy access.
As the improvement to above-mentioned technical proposal, the hydrolysis of urea reactor is provided with safety valve installing port and passes through peace
Full valve installing port installs safety valve；The hydrolysis of urea reactor, which is provided with liquid level gauge installing port and passes through liquid level gauge installing port, pacifies
Fill liquid level gauge.
As the improvement to above-mentioned technical proposal, the hydrolysis of urea reactor is provided with temperature transmitter interface and passes through
Temperature transmitter interface external temperature transmitter；The hydrolysis of urea reactor is provided with pressure transmitter installing port and passes through pressure
Power transmitter installing port installs pressure transmitter.
The principle and process of the utility model be：
1st, dry urea is stored in first in urea warehouse, and it is 50% that mass concentration is dissolved into urea dissolving tank
Urea liquid, in case follow-up hydrolysis of urea ammonia uses；2nd, urea liquid is sent to urine by urea liquid pressurized circulation module
Plain solution measures module, urea solution metering module carry out essence by the variation of liquid level in hydrolysis reactor to the amount of urea liquid
Really metering so that the urea liquid liquid level in hydrolysis reactor remains unchanged；3rd, into hydrolysis reactor urea liquid by water
Tracing steam coil pipe in solution reactor is heated to the temperature and pressure needed for reaction condition, realizes the reaction item of hydrolysis
Part, and the use of catalyst then greatly increases the rate of hydrolysis；4th, the ammonia of hydrolysis of urea generation is sent hydrolysis
It after device, is mixed with the hot-air that high-temperature blower is brought, into ammonia-spraying grid, enters back into SCR reactors and realize denitration reaction.By
It is in the condition needed for hydrolysis of urea：For reaction temperature between 140~160 DEG C, reaction pressure is 0.4~0.6MPa, and more than
The control of condition is mainly completed jointly by urea liquid regulating valve and saturated vapor regulating valve, reacts the NH of generation3With dilution
The boiler secondary air that wind turbine extracts, into ammonia-spraying grid, is entering SCR reactors, so as to fulfill denitration after mixer mixes
Reaction.Wherein as nitrogen oxides NOXWhen concentration rises, NH3Regulating valve open therewith greatly, into the NH of SCR reactors3Amount also with
Rising.The urea liquid amount in hydrolysis reactor can also decline therewith at this time, and urea liquid regulating valve is also opened greatly therewith, to protect
The urea level demonstrate,proved in hydrolysis reactor is constant.And the urea reacted away at this time becomes more, the temperature and pressure in hydrolysis reactor
Also reduce, in order to ensure the operating temperature and pressure of hydrolysis, the regulating valve of saturated vapor can be also held therewith greatly, so as to ensure water
Temperature and pressure in solution reactor reaches reaction condition.
Compared with prior art, the beneficial effects of the utility model are：
The denitrating flue gas urea seeding of the utility model hydrolyzes ammonia system processed, which is hydrolysis reactor,
Using raw material of the urea as ammonia processed, opposite liquefied ammonia and ammonium hydroxide are safe many in the transport of reducing agent, storage and operation,
A series of security risks as caused by liquefied ammonia and ammonium hydroxide ammonia effectively are evaded falling.Hydrolysis of urea reactor and periphery
Device is integrated in a whole set of modularized equipment, substantially reduces construction period；Whole system can realize automation control；Profit
With hydrolyst so that hydrolysis rate greatly promotes；Boiler secondary air be make use of as the dilution hot wind of ammonia and made
With the original saturated vapor of boiler as heat source, effective less system energy consumption.And whole system passes through to hydrolysis reactor
The accurate control of amonia yield is realized in the control of interior temperature, pressure and liquid level, so as to achieve the purpose that accurately to control NOx.
Description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is the process flow chart of the utility model；
Fig. 2 is the hydrolysis reactor of the utility model and its main structure diagram of related fittings；
Fig. 3 is the hydrolysis reactor of the utility model and its overlooking the structure diagram of related fittings.
Specific embodiment
Illustrate the embodiment of the utility model by particular specific embodiment below, those skilled in the art can be by this
Content disclosed by specification understands other advantages and effect of the utility model easily.
Refer to attached drawing.It should be clear that structure, ratio, size depicted in this specification institute accompanying drawings etc., only coordinating
The revealed content of specification, so that those skilled in the art understands and reads, being not limited to the utility model can be real
The qualifications applied, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size
It is whole, in the case where not influencing the effect of the utility model can be generated and the purpose that can reach, should all still fall in the utility model institute
The technology contents of announcement are obtained in the range of covering.Meanwhile in this specification it is cited as " on ", " under ", "left", "right",
" centre " and other terms are merely convenient to understanding rather than to limit the enforceable scope of the utility model, phase for narration
Relation is altered or modified, in the case where changing technology contents without essence, when being also considered as the enforceable scope of the utility model.
With reference to Fig. 1, Fig. 2 and 3, the denitrating flue gas urea seeding of the utility model hydrolyzes ammonia system processed, including at least one
1, urea dissolving conveying device of hydrolysis of urea reactor and a hydrolyst device；The hydrolysis of urea reactor 1
For both ends end socket and it is the pressure vessel of tube structure, which is built-in with tracing steam coil pipe, the urea
Hydrolysis reactor 1 connects urea dissolving conveying device and hydrolyst device and is connected with ammonia outlet 21 outside respectively.Wherein urinate
Plain 1 material of hydrolysis reactor is SUS304 stainless steels.1 inside tracing steam coil pipe of hydrolysis of urea reactor is by several U
Type pipe forms, and material is 316L.
The hydrolysis of urea reactor 1 is provided with hydrolysis urea liquid charge door and passes through connects urine outside urea liquid charge door
Plain solution pipe is provided with flowmeter 13 and urea liquid regulating valve 14 on the urea liquid charge pipe.
The urea dissolving conveying device includes the urea dissolving tank 23, the urea liquid conveyor module that are sequentially connected in series
24th, urea liquid storage tank 25, urea liquid pressurized circulation module 26, urea solution metering module 27, the urea solution metering
Module 27 is connected with urea liquid charge pipe.The urea dissolving tank 23 is circumscribed with urea warehouse 29.It is carried for urea dissolving tank 23
For urea material.
The hydrolyst device includes hydrolyst storage tank 28, and the hydrolysis of urea reactor 1 is provided with hydrolysis
Catalyst charging hole 12, the hydrolyst storage tank 28 pass through hydrolyst charge door 12 and 1 phase of hydrolysis of urea reactor
Connection.
Connect ammonia delivery pipe outside the ammonia outlet 21 and pass through ammonia delivery pipe connection ammonia-spraying grid, from ammonia outlet
21 arrive ammonia-spraying grid import, and ammonia regulating valve 4, ammonia monitoring device 5, ammonia metering mould are disposed in the ammonia delivery pipe
Block 30, static mixer 32.
The ammonia delivery pipe is also circumscribed with hot-air mixing tube, and high-temperature blower 31 is provided on the hot-air mixing tube
And one terminates boiler, one end is connected in the ammonia delivery pipe between ammonia metering module 30 and static mixer 32.
One end of the hydrolysis of urea reactor 1 is provided with vapor collection 9 and hydrophobic header 10, and the vapor collection 9 is provided with
Saturated vapor import 16 simultaneously passes through and is provided with steam tune on 16 steam-out (SO) air inlet pipe of saturated vapor import and the steam inlet duct
Valve 8 is saved, drain valve 11 is provided on the hydrophobic 10 external drain pipe of header and the drain pipe；The hydrolysis of urea reactor 1
It is provided with manhole installing port 19 and manhole 2 is installed by manhole installing port 19, manhole 2, easy access are installed.
The hydrolysis of urea reactor 1 is provided with safety valve installing port 20 and installs safety valve by safety valve installing port 20
3；The hydrolysis of urea reactor 1, which is provided with liquid level gauge installing port 17 and passes through liquid level gauge installing port 17, installs liquid level gauge 7.It is described
Hydrolysis of urea reactor 1 is provided with temperature transmitter interface 22 and by 22 external temperature transmitter 15 of temperature transmitter interface；
The hydrolysis of urea reactor 1, which is provided with pressure transmitter installing port 18 and passes through pressure transmitter installing port 18, installs pressure change
Send device 6.
The principle and process of the utility model be：
1st, dry urea is stored in first in urea warehouse, and it is 50% that mass concentration is dissolved into urea dissolving tank
Urea liquid, in case follow-up hydrolysis of urea ammonia uses；2nd, urea liquid is sent to urine by urea liquid pressurized circulation module
Plain solution measures module, urea solution metering module carry out essence by the variation of liquid level in hydrolysis reactor to the amount of urea liquid
Really metering so that the urea liquid liquid level in hydrolysis reactor remains unchanged；3rd, into hydrolysis reactor urea liquid by water
Tracing steam coil pipe in solution reactor is heated to the temperature and pressure needed for reaction condition, realizes the reaction item of hydrolysis
Part, and the use of catalyst then greatly increases the rate of hydrolysis；4th, the ammonia of hydrolysis of urea generation is sent hydrolysis
It after device, is mixed with the hot-air that high-temperature blower is brought, into ammonia-spraying grid, enters back into SCR reactors and realize denitration reaction.By
It is in the condition needed for hydrolysis of urea：For reaction temperature between 140~160 DEG C, reaction pressure is 0.4~0.6MPa, and more than
The control of condition is mainly completed jointly by urea liquid regulating valve and saturated vapor regulating valve, reacts the NH of generation3With dilution
The boiler secondary air that wind turbine extracts, into ammonia-spraying grid, is entering SCR reactors, so as to fulfill denitration after mixer mixes
Reaction.Wherein as nitrogen oxides NOXWhen concentration rises, NH3Regulating valve open therewith greatly, into the NH of SCR reactors3Amount also with
Rising.The urea liquid amount in hydrolysis reactor can also decline therewith at this time, and urea liquid regulating valve is also opened greatly therewith, to protect
The urea level demonstrate,proved in hydrolysis reactor is constant.And the urea reacted away at this time becomes more, the temperature and pressure in hydrolysis reactor
Also reduce, in order to ensure the operating temperature and pressure of hydrolysis, the regulating valve of saturated vapor can be also held therewith greatly, so as to ensure water
Temperature and pressure in solution reactor reaches reaction condition.
Compared with prior art, the beneficial effects of the utility model are：
The denitrating flue gas urea seeding of the utility model hydrolyzes ammonia system processed, which is hydrolysis reactor,
Using raw material of the urea as ammonia processed, opposite liquefied ammonia and ammonium hydroxide are safe many in the transport of reducing agent, storage and operation,
A series of security risks as caused by liquefied ammonia and ammonium hydroxide ammonia effectively are evaded falling.Hydrolysis of urea reactor and periphery
Device is integrated in a whole set of modularized equipment, substantially reduces construction period；Whole system can realize automation control；Profit
With hydrolyst so that hydrolysis rate greatly promotes；Boiler secondary air be make use of as the dilution hot wind of ammonia and made
With the original saturated vapor of boiler as heat source, effective less system energy consumption.And whole system passes through to hydrolysis reactor
The accurate control of amonia yield is realized in the control of interior temperature, pressure and liquid level, so as to achieve the purpose that accurately to control NOx.
The above embodiments are only illustrative of the principle and efficacy of the utility model, new not for this practicality is limited
Type.Any person skilled in the art can all carry out above-described embodiment under the spirit and scope without prejudice to the utility model
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the revealed essence of the utility model
God and all equivalent modifications completed under technological thought or change, should be covered by the claim of the utility model.
Claims (10)
1. a kind of denitrating flue gas urea seeding hydrolyzes ammonia system processed, it is characterised in that：Including at least a hydrolysis of urea reactor,
One urea dissolving conveying device and a hydrolyst device；The hydrolysis of urea reactor is both ends end socket and is cylinder
The pressure vessel of structure, the hydrolysis of urea reactor are built-in with tracing steam coil pipe, and the hydrolysis of urea reactor connects respectively
Urea dissolves conveying device and hydrolyst device and is connected with ammonia outlet outside.
2. denitrating flue gas urea seeding according to claim 1 hydrolyzes ammonia system processed, it is characterised in that：The hydrolysis of urea
Reactor is provided with hydrolysis urea liquid charge door and passes through connects urea liquid charge pipe, the urea outside urea liquid charge door
Flowmeter and urea liquid regulating valve are provided on solution pipe.
3. denitrating flue gas urea seeding according to claim 1 hydrolyzes ammonia system processed, it is characterised in that：The urea dissolving
Urea dissolving tank, urea liquid conveyor module urea liquid storage tank, the urea liquid that conveying device includes being sequentially connected in series add
Loop module, urea solution metering module are pressed, the urea solution metering module is connected with urea liquid charge pipe.
4. denitrating flue gas urea seeding according to claim 3 hydrolyzes ammonia system processed, it is characterised in that：The urea dissolving
Tank is circumscribed with urea warehouse.
5. denitrating flue gas urea seeding according to claim 1 hydrolyzes ammonia system processed, it is characterised in that：The hydrolyzation catalysis
Agent device includes hydrolyst storage tank, and the hydrolysis of urea reactor is provided with hydrolyst charge door, and the hydrolysis is urged
Agent storage tank is connected by hydrolyst charge door with hydrolysis of urea reactor.
6. denitrating flue gas urea seeding according to claim 1 hydrolyzes ammonia system processed, it is characterised in that：The ammonia outlet
Outer even ammonia delivery pipe simultaneously passes through ammonia delivery pipe connection ammonia-spraying grid, from ammonia outlet to ammonia-spraying grid import, the ammonia
Ammonia regulating valve, ammonia monitoring device, ammonia metering module, static mixer are disposed in delivery pipe.
7. denitrating flue gas urea seeding according to claim 6 hydrolyzes ammonia system processed, it is characterised in that：The ammonia conveying
Pipe is also circumscribed with hot-air mixing tube, high-temperature blower and a termination boiler is provided on the hot-air mixing tube, one end is connected to
In ammonia delivery pipe between ammonia metering module and static mixer.
8. denitrating flue gas urea seeding according to claim 1 hydrolyzes ammonia system processed, it is characterised in that：The hydrolysis of urea
One end of reactor is provided with vapor collection and hydrophobic header, and the vapor collection is provided with saturated vapor import and passes through saturated vapor
It is provided with steam control valve in import steam-out (SO) air inlet pipe and the steam inlet duct, the external drain pipe of the hydrophobic header and should
Drain valve is provided on drain pipe；The hydrolysis of urea reactor is provided with manhole installing port and installs people by manhole installing port
Hole.
9. denitrating flue gas urea seeding according to claim 1 hydrolyzes ammonia system processed, it is characterised in that：The hydrolysis of urea
Reactor is provided with safety valve installing port and installs safety valve by safety valve installing port；The hydrolysis of urea reactor is provided with
Liquid level gauge installing port simultaneously passes through liquid level gauge installing port installation liquid level gauge.
10. denitrating flue gas urea seeding according to claim 1 hydrolyzes ammonia system processed, it is characterised in that：The urea water
Solution reactor is provided with temperature transmitter interface and by temperature transmitter interface external temperature transmitter；The hydrolysis of urea is anti-
Device is answered to be provided with pressure transmitter installing port and passes through pressure transmitter installing port installation pressure transmitter.
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| CN201721314141.6U CN207404853U (en) | 2017-10-12 | 2017-10-12 | A kind of denitrating flue gas urea seeding hydrolyzes ammonia system processed |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111115659A (en) * | 2020-01-17 | 2020-05-08 | 济南山源环保科技有限公司 | Method and device for urea hydrolysis |
| CN112707412A (en) * | 2021-02-05 | 2021-04-27 | 陕西大秦环境科技有限公司 | Process for preparing ammonia by catalytic hydrolysis of urea and accurate ammonia spraying device |
| CN113697827A (en) * | 2021-08-20 | 2021-11-26 | 江西赣能股份有限公司 | SCR denitration urea hydrolysis ammonia production device |
| CN113750948A (en) * | 2021-09-09 | 2021-12-07 | 西安热工研究院有限公司 | Urea catalytic hydrolysis reactor and method for flue gas denitration |
| CN114053955A (en) * | 2021-11-16 | 2022-02-18 | 西安热工研究院有限公司 | Urea hydrolysis ammonia production system and method based on peak regulation and heat storage of coal-fired unit of thermal power plant |
-
2017
- 2017-10-12 CN CN201721314141.6U patent/CN207404853U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111115659A (en) * | 2020-01-17 | 2020-05-08 | 济南山源环保科技有限公司 | Method and device for urea hydrolysis |
| CN112707412A (en) * | 2021-02-05 | 2021-04-27 | 陕西大秦环境科技有限公司 | Process for preparing ammonia by catalytic hydrolysis of urea and accurate ammonia spraying device |
| CN113697827A (en) * | 2021-08-20 | 2021-11-26 | 江西赣能股份有限公司 | SCR denitration urea hydrolysis ammonia production device |
| CN113750948A (en) * | 2021-09-09 | 2021-12-07 | 西安热工研究院有限公司 | Urea catalytic hydrolysis reactor and method for flue gas denitration |
| CN114053955A (en) * | 2021-11-16 | 2022-02-18 | 西安热工研究院有限公司 | Urea hydrolysis ammonia production system and method based on peak regulation and heat storage of coal-fired unit of thermal power plant |
| CN114053955B (en) * | 2021-11-16 | 2024-04-23 | 西安热工研究院有限公司 | System and method for preparing ammonia by urea hydrolysis based on peak regulation and heat storage of coal-fired unit of thermal power plant |
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