CN109059012A - Ground flare closed type combusting device vent gas denitrating system and method - Google Patents
Ground flare closed type combusting device vent gas denitrating system and method Download PDFInfo
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- CN109059012A CN109059012A CN201810938076.7A CN201810938076A CN109059012A CN 109059012 A CN109059012 A CN 109059012A CN 201810938076 A CN201810938076 A CN 201810938076A CN 109059012 A CN109059012 A CN 109059012A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J13/00—Fittings for chimneys or flues
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/005—Regulating fuel supply using electrical or electromechanical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/10—Nitrogen; Compounds thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Chimneys And Flues (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Present disclose provides a kind of ground flare closed type combusting device vent gas denitrating system and methods, wherein vent gas denitrating system, comprising: SCR denitration equipment, the first branch pipe, the first pneumatic operated valve, appendix, the second pneumatic operated valve, the second branch pipe and third pneumatic operated valve；SCR denitration equipment air inlet is connected with burner gas exhaust piping second end, and SCR denitration equipment exhaust outlet is connected with emptying gas pipeline；First branch pipe connects combustor air inlet pipeline and burner gas exhaust piping；First pneumatic operated valve is arranged on the first branch pipe；Appendix is connected with the first branch pipe；Second pneumatic operated valve is arranged on appendix；Second branch pipe connects emptying gas pipeline and burner；Third pneumatic operated valve is arranged on the second branch pipe.NO is effectively reduced in the disclosurexDischarge amount and production cost, realize the effective use of exhaust gas.
Description
Technical field
This disclosure relates to burner flue gas process field more particularly to a kind of ground flare closed type combusting device vent gas
Denitrating system and method.
Background technique
With the worsening of global environment and the gradually reinforcement of people's environmental consciousness, by chemical plant emission exhaust gas
NOxPolluting caused by atmospheric environment with PM etc. has caused international community widely to pay close attention to.In the present that petrochemical industry is grown rapidly
It, the petrochemical industry such as oil refining, chemical industry, plastics and its subsequent production device, due to the scale of these process units and mutual
Connection can all have a large amount of torch gas to be discharged in driving and parking, normal production and dump.Torch gas is petrochemical industry row
The exhaust gas generated in industry production process belongs to inflammable, explosive, poisonous harmful gas, such as CH4、CH3OH、NH3、O2、H2S、H2
Deng.Due to its great harmfulness, the system to guarantee process units is stable and safe, cannot be answered by the way of being directly vented
Be arranged flare system carried out in time, safety burning processing, what processing mode was widely used be elevated torch system or
It is ground flare system.
With the development of reduction of greenhouse gas discharge and carbon dioxide International Transaction process, the present country is had begun using ground
Combustible exhaust gas is carried out burning processing by torch, to meet the purpose that efficient burning, combustion state can monitor.Opposite overhead torch,
Ground flare has that occupied area is small, burn-off rate is high, maintenance is convenient, without the characteristics such as light pollution, low noise, heat radiation be small.Exhaust gas
Complicated component is discharged, existing high pressure flare gas has a ultralow pressure torch gas again, and existing conventional hydrocarbon gas is corrosive gas again, singly
Cylinder ground flare treating capacity, which is generally less than, is equal to 100t/h.Torch gas is burnt in burner internal classification, using high-energy spark
Formula igniting, and the ontology of ground surface blockage burner is cylindrical, it can be achieved that completely enclosing combustion process, thus when avoiding burning
Flame leaks, and outside is without flame, therefore which obviate light pollution, reduce hot good fortune and penetrate.Surface burners are cylindrical, not by temperature
The influence of degree and rainwater, while having preferable noise reduction sound absorption qualities.Therefore torch gas burns in a closed space, and simultaneous
The influence of rain-proof, heat-insulated, noise reduction and other effects by combustion process to environment is reduced to minimum.In ground flare closing burner,
Burner combustion central temperature can reach 1850 DEG C or more.
Since exhaust-gas treatment amount is big and the diversity of burning gases, meeting after burning in current ground flare burner
The other toxic and harmful gas of secondary generation, including soot, NOxEtc..N under high temperature and excess oxygen, in burner2Meeting
And O2Reaction generates NO in the combustion chamber, and NO meeting rapid oxidation is NO2, NOxIt is to cause acid gas, is that photochemical fog is caused to send out
Raw important as precursors object, the fine particulates (PM10/PM2.5) formed will lead to the generation of haze weather, it is therefore necessary to tight
Lattice control NOxDischarge.In addition, also occurring arranging using ground flare burner processing exhaust gas ammonia at present in country chemical plant
It puts, ammonia is contained only in torch gas, in the burner, directly carry out the burning of ammonia.The country is related to ground flare at present
The technology of vent gas processing is also seldom, therefore also needs to carry out denitration process to the vent gas after burner combustion to do more
Add in-depth study.
Summary of the invention
(1) technical problems to be solved
Present disclose provides a kind of ground flare closed type combusting device vent gas denitrating system and methods, at least partly
Solve technical problem set forth above.
(2) technical solution
According to one aspect of the disclosure, a kind of ground flare closed type combusting device vent gas denitrating system is provided,
Ground flare closed type combusting device is provided with burner air inlet and burner exhaust outlet, torch gas by burner air inlet into
Enter ground flare closed type combusting device, burner air inlet is connected with combustor air inlet pipeline, burner exhaust outlet and burner
Gas exhaust piping is connected；Wherein, ground flare closed type combusting device vent gas denitrating system includes: the first branch pipe, the first branch pipe
First end is connected with combustor air inlet pipeline, and the first branch pipe second end is connected with burner gas exhaust piping；SCR denitration equipment, if
It is equipped with SCR denitration equipment air inlet and SCR denitration equipment exhaust outlet；SCR denitration equipment air inlet and burner gas exhaust piping the
Two ends are connected, and SCR denitration equipment exhaust outlet is connected with emptying gas pipeline；First pneumatic operated valve is arranged on the first branch pipe, control
The input SCR denitration equipment of torch gas in first branch pipe；Appendix is connected with the first branch pipe；Second pneumatic operated valve is arranged in gas transmission
Guan Shang, control NH3 pass through input of the appendix to the first branch pipe；Second branch pipe, the second branch pipe first end and emptying gas pipeline
It is connected, the second branch pipe second end is connected with burner；Third pneumatic operated valve is arranged on the second branch pipe.
In some embodiments of the present disclosure, SCR denitration equipment includes: flow straightening grid, first order Catalytic Layer and the second level
Catalytic Layer；Flow straightening grid, first order Catalytic Layer and second level Catalytic Layer are arranged in SCR denitration equipment, and from SCR denitration equipment
Air inlet to SCR denitration equipment exhaust outlet is sequentially arranged.
In some embodiments of the present disclosure, SCR denitration equipment further include: spare Catalytic Layer, setting are catalyzed in the second level
Between layer and SCR denitration equipment exhaust outlet.
In some embodiments of the present disclosure, further includes: deflector is arranged on burner gas exhaust piping.
In some embodiments of the present disclosure, the first pneumatic operated valve, the second pneumatic operated valve and third pneumatic operated valve are Pneumatic butterfly valve.
A kind of ground flare closed type combusting device vent gas denitration side another aspect of the present disclosure provides
Method, comprising: torch gas, which is passed through in burner, to burn；First pneumatic operated valve is closed, and the second pneumatic operated valve is opened, logical by appendix
The NH3 entered converges to form mixed gas by the first branch pipe and by the Gas phase Smoke that burner gas exhaust piping is discharged；Mixed gas
Denitration is carried out into SCR denitration equipment, passes through emptying gas pipeline evacuation.
A kind of ground flare closed type combusting device vent gas denitration side another aspect of the present disclosure provides
Method, comprising: torch gas, which is passed through in burner, to burn, and the first pneumatic operated valve is opened, and torch gas enters the first branch pipe；Second is pneumatic
Valve is opened, and the NH3 that is passed through of torch gas and appendix into the first branch pipe is converged；Pass through the first branch pipe again and passes through burning
The Gas phase Smoke of device exhaust pipe discharge is mixed to form mixed gas；Mixed gas enters SCR denitration equipment and carries out denitration, and third is pneumatic
Valve opening, mixed gas are back to after-flame in burner by second branch.
(3) beneficial effect
It can be seen from the above technical proposal that disclosure ground flare closed type combusting device vent gas denitrating system and side
Method at least has the advantages that one of them or in which a part:
(1) NO of torch burning can be effectively treated in the disclosureXEmission, and then improve the air ring of chemical plant and surrounding
Border.
(2) SCR denitration equipment is easy to reequip, and reaction temperature is low, and catalyst is without precious metal, and long service life is applicable
It is discharged in various working and multiple types exhaust gas.
(3) ground flare closed type combusting device can efficiently use the NH in exhaust gas3, using the NH of chemical plant production3Make
For reducing agent, raw material is sufficient and is conveniently easy to get, low in cost, can be realized de- while reduction torch gas treating capacity improves efficiency
Nitre emission reduction.
(4) Pneumatic butterfly valve is selected to be controlled, movement response is rapid, good reliability, is not easy to reveal.
(5) deflector enables to the distribution of flue gas in the longitudinal direction more uniform, while can also be by changing deflector
Size and shape guide the movement of flue gas.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment of the present disclosure ground flare closed type combusting device vent gas denitrating system.
Fig. 2 is that the process of first embodiment of the present disclosure ground flare closed type combusting device vent gas method of denitration is illustrated
Figure.
Fig. 3 is that the process of second embodiment of the present disclosure ground flare closed type combusting device vent gas method of denitration is illustrated
Figure.
[embodiment of the present disclosure main element symbol description in attached drawing]
10- burner；
11- burner air inlet；
12- burner exhaust outlet；
20- combustor air inlet pipeline；
30- burner gas exhaust piping；
31- deflector；
The first branch pipe of 40-；
The first pneumatic operated valve of 41-；
50- appendix；
The second pneumatic operated valve of 51-
60-SCR denitration device；
61- flow straightening grid
64- first order Catalytic Layer；
The second level 62- Catalytic Layer；
The spare Catalytic Layer of 63-；
The second branch pipe of 70-；
71- third pneumatic operated valve；
80- emptying gas pipeline.
Specific embodiment
Present disclose provides a kind of ground flare closed type combusting device vent gas denitrating system and methods, and wherein ground is fiery
Torch closed type combusting device vent gas denitrating system, comprising: burner, combustor air inlet pipeline, burner gas exhaust piping, first
Branch pipe, SCR denitration equipment, the first pneumatic operated valve, appendix, the second pneumatic operated valve, the second branch pipe and third pneumatic operated valve；Burner setting
There are burner air inlet and burner exhaust outlet；Torch gas enters burner by burner air inlet；Combustor air inlet pipeline
It is connected with burner air inlet；Burner gas exhaust piping first end is connected with burner exhaust outlet；First branch pipe first end and combustion
Burner air inlet pipeline is connected, and the first branch pipe second end is connected with burner gas exhaust piping；SCR denitration equipment is provided with SCR denitration
Equipment air inlet and SCR denitration equipment exhaust outlet；SCR denitration equipment air inlet is connected with burner gas exhaust piping second end, SCR
Denitration device exhaust outlet is connected with emptying gas pipeline；First pneumatic operated valve is arranged on the first branch pipe, controls the first branch pipe moderate heat
The input SCR denitration equipment of torch gas；Appendix is connected with the first branch pipe；Second pneumatic operated valve is arranged on appendix, and control NH3 is logical
Cross input of the appendix to the first branch pipe；Second branch pipe first end is connected with emptying gas pipeline, the second branch pipe second end and combustion
Burner is connected；Third pneumatic operated valve is arranged on the second branch pipe.
For the purposes, technical schemes and advantages of the disclosure are more clearly understood, below in conjunction with specific embodiment, and reference
The disclosure is further described in attached drawing.
Disclosure some embodiments will be done referring to appended attached drawing in rear and more comprehensively describe to property, some of but not complete
The embodiment in portion will be shown.In fact, the various embodiments of the disclosure can be realized in many different forms, and should not be construed
To be limited to this several illustrated embodiment；Relatively, these embodiments are provided so that the disclosure meets applicable legal requirement.
In an exemplary embodiment of the disclosure, it is de- to provide a kind of ground flare closed type combusting device vent gas
Nitre system.Fig. 1 is the structural schematic diagram of embodiment of the present disclosure ground flare closed type combusting device vent gas denitrating system.Such as figure
Shown in 1, ground flare closed type combusting device vent gas denitrating system, comprising: burner 10, combustor air inlet pipeline 20, combustion
Burner gas exhaust piping 30, the first branch pipe 40, SCR denitration equipment 60, the first pneumatic operated valve 41, appendix 50, the second pneumatic operated valve 51,
Two branch pipes 70 and third pneumatic operated valve 71；Burner 10 is provided with burner air inlet 11 and burner exhaust outlet 12；Torch gas is logical
It crosses burner air inlet 11 and enters burner 10；Combustor air inlet pipeline 20 is connected with burner air inlet 11；Burner exhaust
30 first end of pipeline is connected with burner exhaust outlet 12；First branch pipe, 40 first end is connected with combustor air inlet pipeline 20, and first
40 second end of branch pipe is connected with burner gas exhaust piping 30；SCR denitration equipment 60 is provided with SCR denitration equipment air inlet and SCR
Denitration device exhaust outlet；SCR denitration equipment air inlet is connected with 30 second end of burner gas exhaust piping, the exhaust of SCR denitration equipment
Mouth is connected with emptying gas pipeline 80；First pneumatic operated valve 41 is arranged on the first branch pipe 40, controls torch gas in the first branch pipe 40
Input；Appendix 50 is connected with the first branch pipe 40, and the second pneumatic operated valve 51 is arranged on appendix 50, controls NH3Pass through gas transmission
Input of the pipe 50 to the first branch pipe 40.Second branch pipe, 70 first end is connected with emptying gas pipeline 80,70 second end of the second branch pipe
It is connected with burner 10；Third pneumatic operated valve 71 is arranged on the second branch pipe 70.
SCR denitration equipment 60 used in the disclosure, comprising: flow straightening grid 61, first order Catalytic Layer 64, second level catalysis
Layer 62 and spare Catalytic Layer 63；Flow straightening grid 61, first order Catalytic Layer 64, second level Catalytic Layer 62 and spare Catalytic Layer 63 are arranged
It is sequentially arranged in SCR denitration equipment 60, and from SCR denitration equipment air inlet to SCR denitration equipment exhaust outlet.Selective catalysis
Restoring preprocessor (SCR) can be in oxygen-enriched and flow, temperature using aqueous solution of urea as the SCR technology of reducing agent
NO is effectively reduced under degree and the changeable reaction environment of componentxDischarge, efficiency is up to 95% at present.Be widely used in automobile, ship,
The denitration of coal-burning boiler, waste incinerator.Common SCR catalyst has catalytic component based on vanadium and zeolite catalyst, and generally adopts
Aqueous solution of urea with 32.5% is reducing agent, and exhaust is sprayed by way of air-assisted injection.Due in the catalyst with
NOxThe practical reducing agent of reaction is the ammonia (NH that hydrolysis of urea generates3), so, it selects herein straight directly in the first branch pipe 40
It connects into NH3As reducing agent.Two catalyst layers and a preparing catalyst layer are set in SCR denitration equipment 60 to guarantee
Catalysis is abundant, catalyst choice catalytic component based on vanadium.Under normal circumstances, the NO of 61 upstream of flow straightening gridxDistribution and spray ammonia flow point
Match and mix the parameters such as distance, influences whether the first catalyst layer surface NOxWith NH3Distributing homogeneity.
Wherein, it is additionally provided with deflector 31 on burner gas exhaust piping 30, so that the distribution of flue gas in the longitudinal direction is more equal
It is even, in specific implementation the movement of flue gas can also be guided by changing the size and shape of deflector 31.Burner 10 is
Face torch closed type combusting device, the burning of torch gas are completed in a columnar combustion chamber completely, and flame is completely enclosed, outside
Flame is not seen on boundary, without light pollution, is reduced heat radiation and heat transfer, is reduced combustion noise.Combustion chamber cylinder in general embodiments
The diameter of body is 6000mm, wall thickness 8mm.
The Pneumatic butterfly valve that the first pneumatic operated valve 41, the second pneumatic operated valve 51 and third pneumatic operated valve 71 are selected in the disclosure has dynamic
Make fast, good reliability, be not easy to reveal the feature low with expense.
In one embodiment of the disclosure, a kind of ground flare closed type combusting device vent gas denitration side is provided
Method.Fig. 2 is the flow diagram of first embodiment of the present disclosure ground flare closed type combusting device vent gas method of denitration.Such as figure
Shown in 2, comprising: torch gas, which is passed through in burner, to burn；First pneumatic operated valve is closed, and the second pneumatic operated valve is opened, and passes through gas transmission
The NH that pipe is passed through3Converge to form mixed gas by the first branch pipe and by the Gas phase Smoke that burner gas exhaust piping is discharged；Mixing
Gas enters SCR denitration equipment and carries out denitration, passes through emptying gas pipeline evacuation.The present embodiment is primarily adapted for use in torch gas
When hydro carbons and other emissions.
In second embodiment of the disclosure, a kind of ground flare closed type combusting device vent gas method of denitration.Fig. 3
For the flow diagram of second embodiment of the present disclosure ground flare closed type combusting device vent gas method of denitration.As shown in figure 3,
It include: that torch gas is passed through in burner and burns, the first pneumatic operated valve is opened, and torch gas enters the first branch pipe；Second pneumatic operated valve
It opens, into the torch gas and the NH that is passed through of appendix of the first branch pipe3Converged；Pass through the first branch pipe again and passes through burner
The Gas phase Smoke of exhaust pipe discharge is mixed to form mixed gas；Mixed gas enters SCR denitration equipment and carries out denitration, third pneumatic operated valve
Door is opened, and mixed gas is back to after-flame in burner by second branch.The ammonia of torch gas itself is utilized in the present embodiment
Gas is completed also to accomplish exhaust gas utilization while denitration, to achieve the effect that reduce cost as reducing agent.
So far, attached drawing is had been combined the embodiment of the present disclosure is described in detail.It should be noted that in attached drawing or saying
In bright book text, the implementation for not being painted or describing is form known to a person of ordinary skill in the art in technical field, and
It is not described in detail.In addition, the above-mentioned definition to each element and method be not limited in mentioning in embodiment it is various specific
Structure, shape or mode, those of ordinary skill in the art simply can be changed or be replaced to it.
According to above description, those skilled in the art should be de- to disclosure ground flare closed type combusting device vent gas
Nitre system has clear understanding.
In conclusion the disclosure, which provides one kind, greatly reduces NOxDischarge amount, and can also reduce cost and realize useless
The ground flare closed type combusting device vent gas denitrating system and method that gas utilizes.
It should also be noted that, the direction term mentioned in embodiment, for example, "upper", "lower", "front", "rear", " left side ",
" right side " etc. is only the direction with reference to attached drawing, not is used to limit the protection scope of the disclosure.Through attached drawing, identical element by
Same or similar appended drawing reference indicates.When may cause understanding of this disclosure and cause to obscure, conventional structure will be omitted
Or construction.
And the shape and size of each component do not reflect actual size and ratio in figure, and only illustrate the embodiment of the present disclosure
Content.In addition, in the claims, any reference symbol between parentheses should not be configured to the limit to claim
System.
It unless there are known entitled phase otherwise anticipates, the numerical parameter in this specification and appended claims is approximation, energy
Enough bases pass through the resulting required characteristic changing of content of this disclosure.Specifically, all be used in specification and claim
The middle content for indicating composition, the number of reaction condition etc., it is thus understood that repaired by the term of " about " in all situations
Decorations.Under normal circumstances, the meaning expressed refers to include by specific quantity ± 10% variation in some embodiments, some
± 5% variation in embodiment, ± 1% variation in some embodiments, in some embodiments ± 0.5% variation.
Furthermore word "comprising" does not exclude the presence of element or step not listed in the claims.It is located in front of the element
Word "a" or "an" does not exclude the presence of multiple such elements.
The word of ordinal number such as " first ", " second ", " third " etc. used in specification and claim, with modification
Corresponding element, itself is not meant to that the element has any ordinal number, does not also represent the suitable of a certain element and another element
Sequence in sequence or manufacturing method, the use of those ordinal numbers are only used to enable an element and another tool with certain name
Clear differentiation can be made by having the element of identical name.
In addition, unless specifically described or the step of must sequentially occur, there is no restriction in the above institute for the sequence of above-mentioned steps
Column, and can change or rearrange according to required design.And above-described embodiment can be based on the considerations of design and reliability, that
This mix and match is used using or with other embodiments mix and match, i.e., the technical characteristic in different embodiments can be freely combined
Form more embodiments.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of each open aspect,
Above in the description of the exemplary embodiment of the disclosure, each feature of the disclosure is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the disclosed method should not be interpreted as reflecting the following intention: i.e. required to protect
The disclosure of shield requires features more more than feature expressly recited in each claim.More precisely, as following
Claims reflect as, open aspect is all features less than single embodiment disclosed above.Therefore,
Thus the claims for following specific embodiment are expressly incorporated in the specific embodiment, wherein each claim itself
All as the separate embodiments of the disclosure.
Particular embodiments described above has carried out further in detail the purpose of the disclosure, technical scheme and beneficial effects
Describe in detail it is bright, it is all it should be understood that be not limited to the disclosure the foregoing is merely the specific embodiment of the disclosure
Within the spirit and principle of the disclosure, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the disclosure
Within the scope of shield.
Claims (7)
1. a kind of ground flare closed type combusting device vent gas denitrating system, ground flare closed type combusting device are provided with burning
Device air inlet and burner exhaust outlet, torch gas enter ground flare closed type combusting device, burner by burner air inlet
Air inlet is connected with combustor air inlet pipeline, and burner exhaust outlet is connected with burner gas exhaust piping；Wherein, the ground flare
Closed type combusting device vent gas denitrating system includes:
First branch pipe, the first branch pipe first end are connected with the combustor air inlet pipeline, the first branch pipe second end with
The burner gas exhaust piping is connected；
SCR denitration equipment is provided with SCR denitration equipment air inlet and SCR denitration equipment exhaust outlet；The SCR denitration equipment into
Port is connected with the burner gas exhaust piping second end, and the SCR denitration equipment exhaust outlet is connected with emptying gas pipeline；
First pneumatic operated valve is arranged on first branch pipe, and the input SCR denitration for controlling torch gas in first branch pipe is set
It is standby；
Appendix is connected with first branch pipe；
Second pneumatic operated valve is arranged on the appendix, controls NH3Input by from the appendix to first branch pipe；
Second branch pipe, the second branch pipe first end are connected with the emptying gas pipeline, the second branch pipe second end and institute
Burner is stated to be connected；
Third pneumatic operated valve is arranged on second branch pipe.
2. ground flare closed type combusting device vent gas denitrating system according to claim 1, the SCR denitration equipment
It include: flow straightening grid, first order Catalytic Layer and second level Catalytic Layer；
The flow straightening grid, the first order Catalytic Layer and the second level Catalytic Layer are arranged in the SCR denitration equipment, and
It is sequentially arranged from the SCR denitration equipment air inlet to the SCR denitration equipment exhaust outlet.
3. ground flare closed type combusting device vent gas denitrating system according to claim 2, the SCR denitration equipment
Further include: spare Catalytic Layer is arranged between the second level Catalytic Layer and the SCR denitration equipment exhaust outlet.
4. ground flare closed type combusting device vent gas denitrating system according to claim 1, further includes: deflector,
It is arranged on the burner gas exhaust piping.
5. ground flare closed type combusting device vent gas denitrating system according to claim 1, first pneumatic operated valve,
Second pneumatic operated valve and the third pneumatic operated valve are Pneumatic butterfly valve.
6. a kind of ground flare closed type combusting device vent gas method of denitration, comprising:
Torch gas, which is passed through in burner, to burn；
First pneumatic operated valve is closed, and the second pneumatic operated valve is opened, the NH being passed through by appendix3By the first branch pipe and pass through burner
The Gas phase Smoke of gas exhaust piping discharge converges to form mixed gas；
Mixed gas enters SCR denitration equipment and carries out denitration, passes through emptying gas pipeline evacuation.
7. a kind of ground flare closed type combusting device vent gas method of denitration, comprising:
Torch gas, which is passed through in burner, to burn, and the first pneumatic operated valve is opened, and torch gas enters the first branch pipe；
Second pneumatic operated valve is opened, and the NH3 that is passed through of torch gas and appendix into the first branch pipe is converged；
Mixed gas is mixed to form by the first branch pipe and by the Gas phase Smoke that burner exhaust pipe is discharged again；
Mixed gas enters SCR denitration equipment and carries out denitration, and third operated pneumatic valve is opened, and mixed gas is flowed back by second branch
The after-flame into burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810938076.7A CN109059012B (en) | 2018-08-16 | 2018-08-16 | Ground torch closed combustor exhaust gas denitration system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810938076.7A CN109059012B (en) | 2018-08-16 | 2018-08-16 | Ground torch closed combustor exhaust gas denitration system and method |
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| CN109059012A true CN109059012A (en) | 2018-12-21 |
| CN109059012B CN109059012B (en) | 2023-10-10 |
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