CN206556047U - A kind of denitration gas bypass system - Google Patents
A kind of denitration gas bypass system Download PDFInfo
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- CN206556047U CN206556047U CN201720179580.4U CN201720179580U CN206556047U CN 206556047 U CN206556047 U CN 206556047U CN 201720179580 U CN201720179580 U CN 201720179580U CN 206556047 U CN206556047 U CN 206556047U
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- denitration
- smoke inlet
- inlet passage
- economizer
- flue
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Abstract
The purpose of this utility model is to provide a kind of denitration gas bypass system, including bypass flue, economizer, smoke inlet passage, denitration device, bypass flue is arranged between economizer and the denitration entrance of smoke inlet passage, economizer, bypass flue are connected with exhaust gases passes successively, smoke inlet passage is connected with exhaust gases passes, smoke inlet passage is connected with denitration device, and bypass flue is provided between economizer and smoke inlet passage.Denitration gas bypass system of the present utility model, due to being provided with bypass flue between economizer and smoke inlet passage, and bypass flue has the function of monitoring and adjust flue gas flow, realize the temperature for solving and ensureing denitration inlet flue gas under underload, the problem of boiler at low load denitration is up to standard, it ensure that and normally run under power plant's underload, with certain convenience.
Description
Technical field
The utility model is related to power plant's field of environmental engineering, more particularly to a kind of denitration gas bypass system.
Background technology
The output of power generating capacity is changed greatly by market, and power consumption declines to a great extent at this stage, and boiler need to be in underload
Lower operation, thus can not guarantee the requirement of denitration device temperature, has influence on the effect of denitration, not reach country to power plant's denitration
The requirement of standard, for this, raising denitration input gas temperature is imperative under solution boiler at low load, otherwise does not reach environmental protection
It is required that, bring some inconvenience profit, and influence power plant normally runs.
Utility model content
The utility model is directed to above-mentioned problems of the prior art, proposes a kind of denitration gas bypass system, primarily
The technical problem of solution is to realize the temperature for solving to ensure denitration inlet flue gas under underload, and boiler at low load denitration is up to standard to ask
Topic, it is ensured that normally run under power plant's underload, increases convenience.
To achieve the above object, the technical solution of the utility model is：
A kind of denitration gas bypass system, including bypass flue, economizer, smoke inlet passage, denitration device are provided, its
In,
The bypass flue is arranged between economizer and the denitration entrance of smoke inlet passage, the economizer, bypass
Flue is connected with exhaust gases passes successively, and the smoke inlet passage is connected with exhaust gases passes, the smoke inlet passage and denitration
Equipment is connected.
Further, in above-mentioned denitration gas bypass system, in addition to：
It is arranged at the regulating valve between bypass flue and economizer exit.
Further, in above-mentioned denitration gas bypass system, the bypass flue includes stop valve a, stop valve b, pipeline,
The stop valve a and stop valve b are respectively arranged at two ends in pipeline, and the stop valve a is arranged at high-temperature flue gas and entered
Mouth side, the stop valve b is arranged between regulating valve and denitration entrance.
Further, in above-mentioned denitration gas bypass system, insulation outer casing is provided with the pipeline.
Further, in above-mentioned denitration gas bypass system, the insulation outer casing thickness of the pipeline is not less than 0.75mm.
Further, in above-mentioned denitration gas bypass system, in addition to：Temperature controller, auto-controller, it is described automatic
Controller is electrically connected with regulating valve and temperature controller respectively, and the temperature controller is arranged at smoke inlet passage and set with denitration
Standby entrance side.
In the utility model, including bypass flue, economizer, smoke inlet passage, denitration device, the bypass flue is set
It is placed between economizer and the denitration entrance of smoke inlet passage, the economizer, bypass flue are connected with exhaust gases passes successively,
The smoke inlet passage is connected with exhaust gases passes, and the smoke inlet passage is connected with denitration device, is realized and is solved underload
The lower temperature for ensureing denitration inlet flue gas, the problem of boiler at low load denitration is up to standard, it is ensured that normally run under power plant's underload,
Increase convenience.
Brief description of the drawings
It is of the present utility model by reading the detailed description made to non-limiting example made with reference to the following drawings
Other features, objects and advantages will become more apparent upon：
Fig. 1 is structural representation of the present utility model；
Fig. 2 is integral layout structural representation of the present utility model.
Label declaration：
1- stop valves a, 2- bypass flue, 3- economizers, 4- stop valves b, 5- regulating valve, 6- pipelines, 7- temperature controllers,
8- smoke inlet passages, 9- denitration devices, 10- auto-controllers, 11- exhaust gases passes.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings, the present embodiment is with the utility model technical side
It is lower premised on case to be implemented, give detailed embodiment and specific operating process, but protection model of the present utility model
Enclose and be not limited to following embodiments.
As shown in Fig. 2 the utility model provides a kind of denitration gas bypass system, including bypass flue 2, economizer 3, cigarette
Gas access road 8, denitration device 9, wherein,
Bypass flue 2 is arranged between economizer 3 and the denitration entrance of smoke inlet passage 8, economizer 3, bypass flue 2
It is connected successively with exhaust gases passes 11, smoke inlet passage 8 is connected with exhaust gases passes 11, smoke inlet passage 8 connects with denitration device 9
Connect, bypass flue 2 is provided between economizer 3 and smoke inlet passage 8, solve guarantee denitration inlet flue gas under underload
Temperature, the problem of boiler at low load denitration is up to standard, it is ensured that normally run under power plant's underload, increase convenience.
It is preferred that, in addition to：
The regulating valve 5 between bypass flue 2 and the outlet of economizer 3 is arranged at, because regulating valve 5 has regulation flue gas flow
Function, realizes that denitration inlet flue gas temperature is adjustable.
It is preferred that, as shown in figure 1, bypass flue 2 includes stop valve a1, stop valve b4, pipeline 6, stop valve a1 and cut-out
Valve b4 is respectively arranged at two ends in pipeline 6, and stop valve a1 is arranged at high-temperature flue gas entry side, and stop valve b4 is arranged at regulating valve
Between 5 and denitration entrance, as unit load 60-150, bypass flue 2 is run, stop valve a1 and stop valve b4 in pipeline 6
Open, it is ensured that denitration inlet flue gas temperature Ke≤300 DEG C, during unit high load capacity, stop valve a1 and the cut-out that can be closed in bypass flue 2
Valve b4, it is ensured that exhaust gas temperature not superelevation, it is ensured that boiler efficiency is not reduced, and realizes that denitration inlet flue gas temperature is automatically controlled；Stop valve a1
It is, when temperature needed for boiler smoke temperature is normally run and can meet denitration effect, to play cut-out bypass flue 2 with stop valve b4
Channels result there is provided convenience.
It is preferred that, as shown in figure 1, being provided with insulation outer casing in pipeline 6, the flue set up will have INSULATION DESIGN, work as week
When collarette border is not more than 25 DEG C, the insulation layer surface temperature of insulation outer casing must not exceed 50 DEG C；When surrounding environment is more than 25 DEG C
When, the difference of the insulation layer surface temperature and environment temperature that are incubated outer casing must not exceed 25 DEG C.
It is preferred that, the insulation outer casing thickness of pipeline 6 is not less than 0.75mm, when the thickness of insulation outer casing is more than 0.75,
The firm thickness of insulation outer casing is not only increased, while improving the ability of insulation outer casing insulation.
It is preferred that, as shown in Fig. 2 also including：Temperature controller 7, auto-controller 10, auto-controller 10 respectively with tune
Section valve 5 and temperature controller 7 are electrically connected, and temperature controller 7 is arranged at smoke inlet passage 8 and the entrance side of denitration device 9, regulation
The aperture of valve 5 is to survey instrument 7 by the temperature control of denitration porch to detect, instrument is surveyed according to denitration entrance flue gas temperature and then temperature control
The data detected are fed back information to auto-controller 10 by 7 by electric signal, are controlled testing temperature through auto-controller 10 and are adjusted
The aperture of regulating valve 5 is saved, to ensure that denitration device inlet temperature is not less than 300 degree, it is ensured that denitration effect.
Bypass flue 2 be across economizer 3 regulation interface channel, play partial fume be directly entered across economizer 3 it is de-
Nitre entrance, the connection source of bypass flue 2 is that its terminal is denitration entrance on front side of the entrance of economizer 3；Part regulation therein
Valve 5 is installed in the exhanst gas outlet of economizer 3, and stop valve a1 and stop valve b4 are separately mounted to the two ends of bypass flue, and regulating valve 5 is
For adjusting the flue gas throughput of bypass flue 2, the aperture of regulating valve 5 is to survey instrument 7 by the temperature control of denitration porch, according to
Denitration entrance flue gas temperature feeds back information to auto-controller 10, controls testing temperature through auto-controller 10 and adjusts regulating valve 5
Aperture, to ensure that denitration device inlet temperature is not less than 300 degree, it is ensured that denitration effect, stop valve a1 and stop valve b4 are to work as pot
When kiln gas temperature normally runs temperature needed for meeting denitration effect, the function of the passage of cut-out bypass flue 2 is played, is had
Certain convenience.
In summary, in the utility model, including bypass flue 2, economizer 3, smoke inlet passage 8, denitration device 9,
Bypass flue 2 is arranged between economizer 3 and the denitration entrance of smoke inlet passage 8, economizer 3, bypass flue 2 successively with cigarette
Gas passage 11 is connected, and smoke inlet passage 8 is connected with exhaust gases passes 11, and smoke inlet passage 8 is connected with denitration device 9, is being saved
Bypass flue 2 is provided between coal device 3 and smoke inlet passage 8, the temperature for ensureing denitration inlet flue gas under underload is solved,
The problem of boiler at low load denitration is up to standard, it is ensured that normally run under power plant's underload, increases convenience.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the application to the application
God and scope.So, if these modifications and variations of the application belong to the scope of the application claim and its equivalent technologies
Within, then the application is also intended to comprising including these changes and modification.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, can realize that this practicality is new in other specific forms
Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new
The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation
Involved claim.Furthermore, it is to be understood that the word of " comprising " one is not excluded for other units or step, odd number is not excluded for plural number.Device
The multiple units or device stated in claim can also be realized by a unit or device by software or hardware.The
One, the second grade word is used for representing title, and is not offered as any specific order.
Claims (6)
1. a kind of denitration gas bypass system, it is characterised in that including bypass flue (2), economizer (3), smoke inlet passage
(8), denitration device (9), wherein,
The bypass flue (2) is arranged between the denitration entrance of economizer (3) and smoke inlet passage (8), the economizer
(3), bypass flue (2) is connected with exhaust gases passes (11) successively, and the smoke inlet passage (8) is connected with exhaust gases passes (11),
The smoke inlet passage (8) is connected with denitration device (9).
2. denitration gas bypass system according to claim 1, it is characterised in that also include：
It is arranged at the regulating valve (5) between bypass flue (2) and economizer (3) outlet.
3. denitration gas bypass system according to claim 2, it is characterised in that the bypass flue (2) includes cut-out
Valve a (1), stop valve b (4), pipeline (6),
The stop valve a (1) and stop valve b (4) are respectively arranged at pipeline (6) interior two ends, and the stop valve a (1) is arranged at height
Warm smoke inlet side, the stop valve b (4) is arranged between regulating valve (5) and denitration entrance.
4. denitration gas bypass system according to claim 3, it is characterised in that be provided with insulation outside the pipeline (6)
Outer casing.
5. denitration gas bypass system according to claim 4, it is characterised in that the insulation outer casing of the pipeline (6)
Thickness is not less than 0.75mm.
6. denitration gas bypass system according to claim 1, it is characterised in that also include：Temperature controller (7), from
Dynamic controller (10), the auto-controller (10) electrically connects with regulating valve (5) and temperature controller (7) respectively, the temperature
Controller (7) is arranged at smoke inlet passage (8) and denitration device (9) entrance side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720179580.4U CN206556047U (en) | 2017-02-27 | 2017-02-27 | A kind of denitration gas bypass system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720179580.4U CN206556047U (en) | 2017-02-27 | 2017-02-27 | A kind of denitration gas bypass system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206556047U true CN206556047U (en) | 2017-10-13 |
Family
ID=60360872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720179580.4U Active CN206556047U (en) | 2017-02-27 | 2017-02-27 | A kind of denitration gas bypass system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206556047U (en) |
-
2017
- 2017-02-27 CN CN201720179580.4U patent/CN206556047U/en active Active
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