CN106871148A - The threeway switching device of Denitration in Boiler - Google Patents
The threeway switching device of Denitration in Boiler Download PDFInfo
- Publication number
- CN106871148A CN106871148A CN201710210293.XA CN201710210293A CN106871148A CN 106871148 A CN106871148 A CN 106871148A CN 201710210293 A CN201710210293 A CN 201710210293A CN 106871148 A CN106871148 A CN 106871148A
- Authority
- CN
- China
- Prior art keywords
- switching device
- threeway switching
- sealing baffle
- denitration
- framework
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F23J15/006—Layout of treatment plant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The threeway switching device that the present invention provides Denitration in Boiler includes framework and a sealing baffle；Framework is positioned at the flue for importing and exporting junction, low-level (stack-gas) economizer or air preheater of Benitration reactor flue, between high-temperature economizer or the flue of air preheater；Sealing baffle is arranged on framework, and sealing baffle is located at one end and the frame articulation that Benitration reactor imports and exports junction；Sealing baffle can move up and down with the import and export junction of Benitration reactor flue as axle center, realize the opening and closing of threeway switching device.
Description
Technical field
The present invention relates to a kind of chemical field, the threeway switching device of more particularly to a kind of Denitration in Boiler.
Background technology
Because boiler generally uses diesel oil, heavy oil sparking mode, SCR (SCR) denitrating technique is being used
Afterwards, between the point campaign a large amount of incomplete combustions oil smoke, SCR denitration surface can be attached to, cause catalyst surface active
Reduce, and attachment pollution is irreversible procedure, it is impossible to clear up, serious time point stove may once cause catalyst large area to lose
Effect.After catalyst contamination, cause nitrogen oxides exceeded, severe contamination environment, or even it is forced blowing out more catalyst changeout.Boiler occurs
During tube bursting and leakage, have the dust that a large amount of steam enter in Benitration reactor, and flue gas and form adhesion deposition, shadow in the catalyst
Ring the reduction of catalytic reaction efficiency even to fail or block, cause serious ambient influnence or even be forced blowing out to process.
To avoid above accident from occurring, generally designed, it is necessary to de- using bypass when existing boiler increases denitrification apparatus
Nitre Reactor inlet, exhaust pass respectively increase an air door and expansion joint, and also increase air door and expansion joint on shortcut, have
Following drawback：Investment is larger；There must be enough spaces, it is therefore desirable to increase frame height, cause investment and difficulty of construction to increase
Plus；Operation adjustment is very cumbersome, coordinates the negative pressure that can cause boiler not in place and fluctuates or even fire extinguishing blowing out.
The content of the invention
At least one deficiency in order to overcome prior art of the invention, for newly constructed boiler SCR denitration system design and installation
And the transformation of old boiler SCR denitration, boiler SCR denitration device is lighted a fire and put into operation process or boiler when there is tube bursting and leakage accident, energy
Enough interim excision Benitration reactors, it is to avoid oil smoke, moisture contamination or blocking catalyst, are reaching minimum discharge simultaneously, it is ensured that pot
Stove operation safety, reduces economic loss and reduces the purpose of investment.
To achieve these goals, the present invention uses following technical scheme：
The present invention provides a kind of threeway switching device of Denitration in Boiler, including framework and a sealing baffle；
Framework is located at the flue for importing and exporting junction, low-level (stack-gas) economizer or air preheater of Benitration reactor flue, high temperature and saves
Between coal device or the flue of air preheater；
Sealing baffle is arranged on framework, and sealing baffle is located at one end and the framework hinge that Benitration reactor imports and exports junction
Connect；Sealing baffle can move up and down with the import and export junction of Benitration reactor flue as axle center, realize threeway switching device
Open and close.
Further, as one embodiment of the present invention, in one embodiment of the invention, framework and sealing baffle
Junction is provided with seal groove, and sealing baffle is provided with downward projection with the junction of framework, in the raised overlap joint to seal groove,
Realize the sealing between sealing baffle and framework.
Further, as one embodiment of the present invention, in one embodiment of the invention, the threeway switching device
Also include connecting rod and control valve, one end of connecting rod is hinged on sealing baffle upper surface, and the other end is hinged on the valve of control valve
On bar.
Further, as one embodiment of the present invention, in one embodiment of the invention, control valve is provided with and carries
Rise device, the opening for realizing threeway switching device.
Further, as one embodiment of the present invention, in one embodiment of the invention, the threeway switching device
Also include closing hinge, the closing is hingedly connected at sealing baffle lower surface, the closing for realizing threeway switching device.
Further, as one embodiment of the present invention, in one embodiment of the invention, the control valve is also wrapped
Valve rod sleeve pipe is included, the valve rod casing pipe sleeve is located at outside valve rod.
Further, as one embodiment of the present invention, in one embodiment of the invention, the control valve is also wrapped
Include sealing and transmission mechanism.
Further, as one embodiment of the present invention, in one embodiment of the invention, flue turning is aweather
Face is provided with wear strip.
Further, the threeway switching device is provided with polylith sealing baffle, and the framework is accordingly divided into multiple frames.Framework
Upper each frame is provided with seal groove with the junction of sealing baffle, and sealing baffle is provided with downward projection, institute with the junction of framework
State in raised overlap joint to seal groove, realize the sealing between sealing baffle and framework.
Compared with prior art, the present invention has advantages below：
The present invention makes full use of useful space distance according to denitrification apparatus and former boiler relative position, is not influenceing denitration
In the case of boiler integral layout, denitration threeway switching device is designed and produced.Design effectively turns to sealing baffle, boiler point campaign
Between or occur tube bursting and leakage accident when, by sealing baffle side with denitration flue import and export junction as axle center, along effective travel
On earth, flue gas is directly entered back-end surfaces to upward sliding along shortcut under suction function, is entered by electric precipitation and desulfurizer
Be effectively isolated for SCR denitration system by row effectively removing discharge, realization.When boiler normally runs, by baffle plate side according to effectively
Stroke slide downward on earth, to importing and exporting at opposite side seal groove, close overlap joint, and flue gas is incorporated to Benitration reactor by line passage,
Nitrogen oxides is effectively removed through SCR denitration, environmentally friendly minimum discharge is realized.
This device has the characteristics that：1) succinct, reliable in action is designed, easy to use, effective utilization space is eliminated often
Three baffle doors of design are advised, investment reduction expense (every boiler can save more than 600,000 yuan), construction workload is reduced, can
Greatly shorten construction period.2) card slot type sealing device is used, good sealing property during normal operation is effectively ensured.3) in flue gas
The design of turning luvisde increases wear strip, it is to avoid the erosive wear that the flue gas turning of dust content high is caused.4) two-way pulling is used
Adjustment, it is to avoid the bite that long term high temperature, corrosion are caused, it is ensured that good using effect, it is possible to use and pneumatically or electrically drive,
Realize that remote auto is adjusted.5) the multi-door arrangement of frame-type is used according to flue size in flue transverse direction, it is ensured that each door can
Sealing fails caused by avoiding high temperature deformation, and improves the flexibility of adjustment.6) due to using single valve board structure, adjusting process
In ensure that boiler negative regulation, load will not be had any impact.
The present invention applies in our factory's boiler above-mentioned technology, and when first time blowing out is checked, denitrating catalyst surface is clear
Clean, intact, without greasy dirt contamination phenomenon, three open gates design succinct, and action is completely reliable, and nothing is leaked out, metaboly, can save sky
Between, reduction denitrification apparatus initial cost, and ensure the stabilization of adjustment process, effect is obvious.
It is that above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly,
And coordinate accompanying drawing, it is described in detail below.
Brief description of the drawings
Fig. 1 is to use the boiler schematics that threeway switching device is used in one embodiment of the invention.
Fig. 2 is the enlarged drawing of A in Fig. 1.
Structural representation when Fig. 3 is the sealing baffle closing of the threeway switching device in another embodiment of the present invention.
Fig. 4 is the enlarged drawing of B in Fig. 3.
Fig. 5 is the enlarged drawing of C in Fig. 3.
Structural representation when Fig. 6 is the sealing baffle opening of threeway switching device in Fig. 3.
Specific embodiment
Fig. 1 is to use the boiler schematics that threeway switching device is used in one embodiment of the invention.Fig. 2 is A in Fig. 1
Enlarged drawing.Understood with reference to Fig. 1 and Fig. 2, the threeway switching device 400 of Denitration in Boiler of the invention, positioned at Benitration reactor 300,
Between low-level (stack-gas) economizer or air preheater 200, high-temperature economizer or air preheater 100.
Structural representation when Fig. 3 is the sealing baffle closing of the threeway switching device in another embodiment of the present invention.
As shown in figure 3, the Denitration in Boiler threeway switching device 400 of the present embodiment includes framework 1, sealing baffle 2.
Its middle frame 1 is located at flue, the height of importing and exporting junction, low-level (stack-gas) economizer or air preheater of Benitration reactor flue
Between warm economizer or the flue of air preheater.
Sealing baffle 2 is arranged on framework 1, and sealing baffle 2 is located at one end and the frame that Benitration reactor imports and exports junction
Frame 1 is hinged；Sealing baffle 2 can move up and down with the import and export junction of Benitration reactor flue as axle center, realize threeway switching
The opening and closing of device.
Fig. 4 is the enlarged drawing of B in Fig. 3.Fig. 5 is the enlarged drawing of C in Fig. 3.As shown in Figure 4 and Figure 5, framework 1 is provided with sealing
Groove 11, sealing baffle is provided with downward raised 21, in raised 21 overlap joint to the seal groove 11, realizes sealing baffle 2 and frame
Sealing between frame 1.Using this kind of card slot type sealing device, good sealing property during normal operation is effectively ensured.
In the present invention, the sealing baffle 2 can set multiple, and corresponding framework 1 is divided into multiple frames, now each frame
Seal groove is equipped with, the sealing between sealing baffle and framework is realized.
Threeway switching device also includes connecting rod 3, valve rod sleeve pipe 4, valve rod 6, sealing and transmission mechanism 5.
One end of wherein connecting rod 3 is hinged on the upper surface of sealing baffle 2, and the other end is hinged on valve rod 6.
Valve rod sleeve pipe 4 is set in outside valve rod 6.Sealing and transmission mechanism 5 are used to realize the sealing and transmission of control valve.
Control valve is provided with lifting device, can upwards be moved with ovable valve stem 6, so that drivening rod 3 is moved, and then pulls
Sealing baffle 2 is opened up.
Threeway switching device also includes closing hinge 8, and the closing hinge 8 is connected to the lower surface of sealing baffle 2, and auxiliary is real
The closing of existing threeway switching device.
Further, the luvisde at flue turning is provided with wear strip 7, it is to avoid what the flue gas turning of dust content high was caused washes away
Abrasion.
When the sealing baffle 2 of the threeway switching device in the present invention is closed, arrow indicates the traffic direction of flue gas in Fig. 3,
As shown in figure 3, flue of the flue gas from high-temperature economizer or air preheater 100 along the top of sealing baffle 2, into Benitration reactor
300；From Benitration reactor 300 remove nitrogen oxides the sealed bottom of baffle plate 2 of flue gas flue return to low-level (stack-gas) economizer or
Air preheater 200, into back-end surfaces discharge.Under the state, sealing baffle card slot type sealing structure determines its tightness, keeps away
The discharge for having exempted from nitrogen oxides is exceeded.
When the accidents such as booster occur in initial ignition or boiler, the sealing baffle 2 of threeway switching device is opened, arrow in Fig. 6
Head indicates the traffic direction of flue gas, as shown in fig. 6, before the flue gas from high-temperature economizer or air preheater 100 is along sealing baffle 2
Position is directly entered downwards low-level (stack-gas) economizer or air preheater 200, and into back-end surfaces, the flue gas containing oil smoke or steam receives negative pressure
Effect is not entered back into Benitration reactor 300.The present invention is provided with wear strip 7 in turning site under this state, strengthens wearability
Can, it is to avoid surface wear drawn game portion dust stratification windward.
Although the present invention is disclosed above by preferred embodiment, but the present invention is not limited to, it is any to know this skill
Skill person, without departing from the spirit and scope of the present invention, can make a little change and retouching, therefore protection scope of the present invention is worked as
It is defined depending on claims scope required for protection.
Claims (9)
1. the threeway switching device of Denitration in Boiler, it is characterised in that the threeway switching device of the Denitration in Boiler include framework and
One sealing baffle；
Framework is located at flue, the high-temperature economizer of importing and exporting junction, low-level (stack-gas) economizer or air preheater of Benitration reactor flue
Or between the flue of air preheater；
Sealing baffle is arranged on framework, and sealing baffle is located at one end and the frame articulation that Benitration reactor imports and exports junction；
Sealing baffle can move up and down with the import and export junction of Benitration reactor flue as axle center, realize beating for threeway switching device
It is open and close.
2. the threeway switching device of Denitration in Boiler according to claim 1, it is characterised in that the company of framework and sealing baffle
The place of connecing is provided with seal groove, and sealing baffle is provided with downward projection with the junction of framework, real in the raised overlap joint to seal groove
Existing sealing between sealing baffle and framework.
3. the threeway switching device of Denitration in Boiler according to claim 1, it is characterised in that the threeway switching device is also
Including connecting rod and control valve, one end of connecting rod is hinged on sealing baffle upper surface, and the other end is hinged on the valve rod of control valve
On.
4. the threeway switching device of Denitration in Boiler according to claim 3, it is characterised in that control valve is provided with lifting
Device, the opening for realizing threeway switching device.
5. the threeway switching device of Denitration in Boiler according to claim 1, it is characterised in that the threeway switching device is also
Including closing hinge, the closing is hingedly connected at sealing baffle lower surface, the closing for realizing threeway switching device.
6. the threeway switching device of Denitration in Boiler according to claim 3, it is characterised in that the control valve also includes
Valve rod sleeve pipe, the valve rod casing pipe sleeve is located at outside valve rod.
7. the threeway switching device of Denitration in Boiler according to claim 3, it is characterised in that the control valve also includes
Sealing and transmission mechanism.
8. the threeway switching device of Denitration in Boiler according to claim 1, it is characterised in that the luvisde at flue turning
It is provided with wear strip.
9. the threeway switching device of Denitration in Boiler according to claim 2, it is characterised in that the threeway switching device sets
There is polylith sealing baffle, the framework is accordingly divided into multiple frames.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710210293.XA CN106871148B (en) | 2017-03-31 | 2017-03-31 | Tee joint switching device for denitration of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710210293.XA CN106871148B (en) | 2017-03-31 | 2017-03-31 | Tee joint switching device for denitration of boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106871148A true CN106871148A (en) | 2017-06-20 |
| CN106871148B CN106871148B (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710210293.XA Active CN106871148B (en) | 2017-03-31 | 2017-03-31 | Tee joint switching device for denitration of boiler |
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| CN (1) | CN106871148B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010035136A1 (en) * | 1997-10-08 | 2001-11-01 | Kabushiki Kaisha Toshiba | Exhaust heat recovery boiler |
| CN103900097A (en) * | 2014-03-26 | 2014-07-02 | 东南大学 | SCR (selective catalytic reduction) denitrification modification method and SCR denitrification modification device for boilers |
| CN205517269U (en) * | 2016-01-18 | 2016-08-31 | 同方环境股份有限公司 | SCR denitrification facility suitable for two economizers, air preheater staggered arrangement |
| CN206626594U (en) * | 2017-03-31 | 2017-11-10 | 冯力燕 | The threeway switching device of Denitration in Boiler |
-
2017
- 2017-03-31 CN CN201710210293.XA patent/CN106871148B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010035136A1 (en) * | 1997-10-08 | 2001-11-01 | Kabushiki Kaisha Toshiba | Exhaust heat recovery boiler |
| CN103900097A (en) * | 2014-03-26 | 2014-07-02 | 东南大学 | SCR (selective catalytic reduction) denitrification modification method and SCR denitrification modification device for boilers |
| CN205517269U (en) * | 2016-01-18 | 2016-08-31 | 同方环境股份有限公司 | SCR denitrification facility suitable for two economizers, air preheater staggered arrangement |
| CN206626594U (en) * | 2017-03-31 | 2017-11-10 | 冯力燕 | The threeway switching device of Denitration in Boiler |
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| Publication number | Publication date |
|---|---|
| CN106871148B (en) | 2023-04-25 |
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