CN209540905U - A kind of grate furnace smoke backflow and overfire air jet - Google Patents
A kind of grate furnace smoke backflow and overfire air jet Download PDFInfo
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- CN209540905U CN209540905U CN201822115325.0U CN201822115325U CN209540905U CN 209540905 U CN209540905 U CN 209540905U CN 201822115325 U CN201822115325 U CN 201822115325U CN 209540905 U CN209540905 U CN 209540905U
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- nozzle
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- shut
- arch
- smoke backflow
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Abstract
The utility model relates to a kind of grate furnace smoke backflow and overfire air jets, it is that secondary air channel merges with backflow flue gas pipe in forward and backward arch header position, face arch nozzle and rear arch nozzle interlaced arrangement, turbulent flow, face arch nozzle shut-off valve and rear arch nozzle shut-off valve interlaced arrangement are formed in furnace convenient for the gas of ejection.Shut-off valve is installed on nozzle, by switch sections nozzle, realizes the control of nozzle air quantity, closes nozzle shut-off valve when running Secondary Air, operation nozzle number is reduced, meets Secondary Air air quantity requirement；When running smoke backflow, nozzle shut-off valve, all nozzle operations are opened, meet flue gas air quantity requirement, realize the conversion of two kinds of technique of smoke backflow and Secondary Air, and collecting box pipe reduction may be implemented, more easy to install and maintenance achievees the effect that save space and save the cost.
Description
Technical field
The utility model relates to a kind of waste incineration and generating electricity fields to be compatible with the nozzle used for flue gas recirculation and Secondary Air,
Flue gas can be run and return spray, can also run Secondary Air.
Background technique
Currently, domestic waste incineration and generating electricity industry generally prevents from generating abnormal high temperature in furnace using Secondary Air technology, and
Suitable oxygen concentration can be provided for full combustion and the NOx concentration in flue gas is effectively reduced.Secondary Air is by being mounted on furnace body
The nozzle of the first partition wall of antetheca and waste heat boiler nose sprays into incinerator.Flue gas recirculating technique is now introduced, being exactly will burning
The flue gas of generation is sent to combustion zone again, the control to ignition temperature oxide concentration is realized, to realize reduction nitrogen oxidation
The discharge and energy saving effect of object.But since throat is disposed with overfire air jet originally, since narrow space is encircleed in front and back,
The pipeline of two sets of equipment is difficult to be simutaneously arranged down, if cancelling overfire air jet only with smoke backflow, because of Secondary Air and reflux
Flue gas flow difference is bigger, and worries that new technology actual effect is bad, and the later period can not change back overfire air device again, influence to burn
Furnace performance.
Summary of the invention
In order to overcome the problems, such as that above-mentioned Secondary Air in the prior art merges with smoke backflow, the utility model provides a kind of spray
Mouth, the nozzle can not only run Secondary Air, can also run smoke backflow.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
A kind of grate furnace smoke backflow and overfire air jet are secondary air channel and backflow flue gas pipe in forward and backward arch header position
Merging, face arch nozzle and rear arch nozzle interlaced arrangement are set, forms turbulent flow, face arch nozzle shut-off valve in furnace convenient for the gas of ejection
With rear arch nozzle shut-off valve interlaced arrangement.
Further, rear arch header connection rear arch nozzle, face arch header connection face arch nozzle nozzle quantity according to
The biggish smoke backflow of air quantity calculates arrangement, and valve is arranged on each spray head.
When working condition, when running Secondary Air, rear arch air inlet and face arch air inlet are passed through Secondary Air, close rear arch spray
Mouth shut-off valve and face arch nozzle shut-off valve；When running smoke backflow, rear arch air inlet and face arch air inlet are passed through recycling cigarette
Gas opens rear arch nozzle shut-off valve and face arch nozzle shut-off valve.Nozzle quantity and shut-off valve quantity can be drafted by Wind Coverage Calculation.
The utility model has the beneficial effects that first is that can run boiler provide two kinds of techniques of Secondary Air and smoke backflow,
Second is that making full use of nozzle, intake stack, save the cost about 40% all the way is reduced, and occupy less space, facilitate installation and inspection
It repairs.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the nozzle arrangements figure of a kind of grate furnace smoke backflow of the utility model and Secondary Air rear arch nozzle.
Fig. 2 is the nozzle arrangements figure of a kind of grate furnace smoke backflow of the utility model and Secondary Air face arch nozzle.
Fig. 1: 1. rear arch air inlets；2. rear arch header；3. rear arch nozzle shut-off valve；4. rear arch nozzle；5. face arch air inlet；
6. face arch header；7. face arch nozzle shut-off valve；8. face arch nozzle.
Specific embodiment
As depicted in figs. 1 and 2, a kind of grate furnace smoke backflow and overfire air jet are secondary air channel and backflow flue gas pipe
Merge in forward and backward arch header position, 4 interlaced arrangement of face arch nozzle 8 and rear arch nozzle forms rapids convenient for the gas of ejection in furnace
Stream, face arch nozzle shut-off valve 7 and rear arch nozzle shut-off valve 3 also need interlaced arrangement.
When running Secondary Air, rear arch air inlet 1 and face arch air inlet 5 are passed through Secondary Air, close rear arch nozzle shut-off valve 3
With face arch nozzle shut-off valve 7；When running smoke backflow, rear arch air inlet 1 and face arch air inlet 5 are passed through flue gas recycled, open
Rear arch nozzle shut-off valve 3 and face arch nozzle shut-off valve 7.The face arch of rear arch nozzle 4, the connection of face arch header 6 that rear arch header 2 connects
The nozzle quantity of nozzle 8 calculates arrangement according to the biggish smoke backflow of air quantity, and valve is arranged on each spray head.Nozzle quantity and
Shut-off valve quantity can be drafted by Wind Coverage Calculation.
The control of nozzle air quantity is realized by switch sections nozzle using the nozzle arrangements of the utility model, is run secondary
Nozzle shut-off valve is closed when wind, is reduced operation nozzle number, is met Secondary Air air quantity requirement；When running smoke backflow, spray is opened
Mouth shut-off valve, all nozzle operations, meets flue gas air quantity requirement, realizes the conversion of two kinds of technique of smoke backflow and Secondary Air, and
Collecting box pipe reduction may be implemented, more easy to install and maintenance achievees the effect that save space and save the cost.
Claims (2)
1. a kind of grate furnace smoke backflow and overfire air jet, which is characterized in that be secondary air channel with backflow flue gas pipe forward and backward
Encircle header position to merge, face arch nozzle and rear arch nozzle interlaced arrangement, forms turbulent flow, face arch spray in furnace convenient for the gas of ejection
Mouth shut-off valve and rear arch nozzle shut-off valve interlaced arrangement.
2. a kind of grate furnace smoke backflow according to claim 1 and overfire air jet, which is characterized in that rear arch header connects
The face arch nozzle of the rear arch nozzle, the connection of face arch header that connect, is arranged valve on each spray head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822115325.0U CN209540905U (en) | 2018-12-17 | 2018-12-17 | A kind of grate furnace smoke backflow and overfire air jet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822115325.0U CN209540905U (en) | 2018-12-17 | 2018-12-17 | A kind of grate furnace smoke backflow and overfire air jet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209540905U true CN209540905U (en) | 2019-10-25 |
Family
ID=68264458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822115325.0U Active CN209540905U (en) | 2018-12-17 | 2018-12-17 | A kind of grate furnace smoke backflow and overfire air jet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209540905U (en) |
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2018
- 2018-12-17 CN CN201822115325.0U patent/CN209540905U/en active Active
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