CN208886755U - A kind of adherent wind apparatus of adjustable relay-type - Google Patents
A kind of adherent wind apparatus of adjustable relay-type Download PDFInfo
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- CN208886755U CN208886755U CN201820878638.9U CN201820878638U CN208886755U CN 208886755 U CN208886755 U CN 208886755U CN 201820878638 U CN201820878638 U CN 201820878638U CN 208886755 U CN208886755 U CN 208886755U
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Abstract
The utility model discloses a kind of adherent wind apparatus of adjustable relay-type, including adherent wind snout (1), adherent wind air duct (2), adherent wind controllable register (3), the adherent wind snout (1) is arranged in water-cooling wall and leaves on the wall surface and/or middle part wall-cooling surface of angular region, primary air ejiction opening (4) and upper next air-flow ejiction opening (5) are respectively set in the upper and lower two sides of adherent wind snout (1), and the adherent up and down both direction of wind snout air-flow sprays or oblique ejection up and down；Adherent wind air duct (2) is connected with the big bellows of Secondary Air, and adherent wind snout (1) connects adherent wind air duct (2), and controllable register (3) are arranged on adherent wind air duct (2).Adherent wind primary air is not easy to sweep along interference by primary air in furnace, and it is big to reach generally adherent wind covering surface, the effective oxygenating of near wall region, improves or eliminates the reducing atmosphere of water-cooling wall, improvement or eliminate high temperature corrosion, and then mitigates or prevent water-cooling wall slagging.
Description
Technical field
The utility model belongs to coal-powder boiler tangential firing technical field, and in particular to a kind of adjustable adherent wind dress of relay-type
It sets.
Background technique
With the raising that conservancy and energy-saving production requires, dense burning (or the burning of rich or poor powder) technology and Researched of Air Staging Combustion Burning Pulverized Coal
Technology is now widely used for domestic coal powder boiler combustion, in practice it has proved that the application of these technologies is one for coal-burning power plant
The relatively inexpensive reasonable NOx control mode of kind.Dense burning (or rich or poor powder burning) technology by breeze airflow (First air) into
Row separation disposition, is fed separately to burner hearth after being allocated as deep or light two strands of air-flows.Thus deviateing thick coal culm air-flow and thin powdered coal air-flow
It burns in the case where stoichiometric ratio, the generation of nitrogen oxides can be reduced.Air staged combustion technology is by air point two-stage
Or multistage feeding, the excess air coefficient that wherein main burning area is sent into are 0.8, limit burning velocity and the main burning area of coal dust
Temperature, can effectively inhibit the generation of heating power type and fuel NO.Remaining air is sent into burning-out zone, to uncombusted coke
Charcoal particle burns, and because temperature reduces, the production quantity of nitrogen oxides is greatly reduced, and generally realizes low nitrogen burning.
Coal dust is when above-mentioned main burner area burns, and because anoxic generates the carbon monoxide of higher concentration, makes this region be in
Reveal reducing atmosphere, more serious high temperature corrosion is constituted to the water-cooling wall of main burning area periphery and is threatened.
In the existing technical measures to solve the above problems, answered with installing adherent wind additional in angular region overfire air port two sides
With the most common.Local oxygen content of these technologies to improve water wall high temperature corrosion region is fundamentally destroyed and height occurs
Reducing atmosphere necessary to temperature is corroded.Since angular region space limits, adherent wind snout size is restricted；And angular region flow field is tied
Structure is again complex, and there are different degrees of influence and containings between different air-flows, in addition wall surface and front flue gas resistance, air-flow
Range is restricted；Burning, unformed initial segment atmosphere is generally oxidisability；The water-cooling wall for needing to take into account again
Area is larger, integrates, and keeps the practical application effect of adherent wind bad.In addition, the adherent wind snout of angular region arrangement has half
Primary air is formed inversely in jet direction and furnace, and effect is even more to be limited, and actual effect is poor, Yi Fasheng water wall high temperature corrosion and
The problems such as large-sized boiler is more prominent, the above show more prominent on large-sized boiler.
Utility model content
The utility model is intended to overcome the deficiencies of existing technologies, and provides a kind of adherent wind apparatus of adjustable relay-type.Mesh
Be, adapt to furnace in primary air Flow Field Distribution situation, improve adherent wind momentum of impinging jet, it is close to water-cooling wall to enhance adherent wind jet stream
The disturbance of wall area atmosphere, effective oxygenating improve the reducing atmosphere of water-cooling wall near-wall region, improve and eliminate the corruption of water-cooling wall high temperature
Erosion, and then mitigate or prevent water-cooling wall slagging.
In order to solve the above-mentioned technical problem, the utility model the following technical schemes are provided:
A kind of adherent wind apparatus of adjustable relay-type, including adherent wind snout 1, adherent wind air duct 2, adherent wind controllable register
3, the adherent wind snout 1 is arranged in water-cooling wall and leaves on the wall surface and/or middle part wall-cooling surface of angular region, on adherent wind snout 1,
Primary air ejiction opening 4 and upper next air-flow ejiction opening 5, the adherent up and down both direction of wind snout air-flow is respectively set in lower two sides
Ejection or oblique ejection up and down；Adherent wind air duct is connected with the big bellows of Secondary Air, and adherent wind snout connects adherent wind wind
Controllable register 3 is arranged in road on adherent wind air duct.
Preferably, three layers of primary air ejiction opening point, totally six, the ejection of primary air ejiction opening 4 air quantity ratio is big, and air-flow is water
Square to；It is small that upper air-flow ejiction opening next time 5 sprays air quantity ratio accounting, exit flow and horizontal direction air-flow it is at 45 °~90 °.
Preferably, the outlet primary air direction of adherent wind snout 1 keeps one with whole torch direction of rotation, that is, circle of contact in furnace
It causes, primary air direction is overlooked as rotation counterclockwise.Horizontal primary air direction is consistent between the same layer spout arranged on same wall surface,
Form relay mode.
Preferably, adherent wind snout 1 is arranged after angular region certain distance A is left on boiler horizontal cross-section；Patch at A
Increase after 1 distance B of wall wind snout and another adherent wind snout is set, the primary air ejiction opening of the adherent wind snout, upper next air-flow
5 direction of ejiction opening is identical as at A.
Preferably, adherent wind snout 1 leaves water-cooling wall certain distance C, while making main airflow exit jet stream and wall-cooling surface
Between have certain angle α.
Preferably, adherent wind snout 1 is mounted on boiler main burning area and top high-temperature and low-oxygen combustion section.
Preferably, more adherent wind snouts 1 of set, water-cooling wall adherent wind snout cloth are set on large-sized boiler same layer wall-cooling surface
Setting number of plies N is 2~5 layers.
Compared with prior art, the utility model have it is following the utility model has the advantages that
It is that adherent wind air duct is connected with the big bellows of Secondary Air and individually takes wind first, is easily guaranteed that the adherent wind air quantity of separate unit；
The stronger angular region of oxidizing atmosphere is followed by left, is sent into adherent air-flow in reducing atmosphere crescendo and stronger region；It is adherent
Wind snout exports horizontal primary air direction with whole torch direction of rotation in furnace, that is, circle of contact direction holding collaboration and relay is combined,
The secondary up and down both direction of air-flow vertically sprays or oblique ejection up and down, can effectively increase adherent wind sphere of action；Can have
Effect makes up the situation of single spout outlet air-flow Momentum mixing reduction, covering surface deficiency, makes the water cooling of adherent wind energy covering protection
Wall area greatly increases.The overall disturbance for enhancing adherent wind jet stream to water-cooling wall near wall region atmosphere, effective oxygenating improve or eliminate
Reducing atmosphere, improvement or the elimination high temperature corrosion of water-cooling wall, and then mitigate or prevent water-cooling wall slagging.
Adherent wind relay combination, which is suitable for large-sized boiler coal dust low nitrogen burning, prevents the mating of high temperature corrosion or transformation,
While being allowed to obtain preferable anti-slag, low nitrogen burning effect, effective high temperature corrosion resistance.
Detailed description of the invention
Fig. 1 is that the adherent wind apparatus separate unit spout of relay-type, air duct, controllable register schematic diagram is adjusted in the utility model.
Fig. 2 is the scheme of installation that the adherent wind apparatus of relay-type is adjusted in the utility model.
Fig. 3 is the multilayer scheme of installation that the adherent wind apparatus of relay-type is adjusted in the utility model.
1 is adherent wind snout, and 2 be adherent wind air duct, and 3 be adherent wind controllable register, and 4 be primary air ejiction opening, and 5 be upper and lower
Secondary air-flow ejiction opening.
A indicates that the adherent wind snout of First leaves the size of angular region, and B indicates second adherent wind snout and first of relay
Size between platform, C indicate that adherent wind snout outlet axes leave the distance of wall-cooling surface, and α indicates that adherent wind snout exports axis
Angle between line and wall-cooling surface, D are boiler equivalent diameter, and N indicates the number of plies that adherent wind is installed on vertical metope in furnace.
Specific embodiment
It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of adherent wind apparatus of adjustable relay-type, including adherent wind snout 1, adherent wind
Air duct 2, adherent wind controllable register 3, the adherent wind snout 1 are arranged in the wall surface and/or middle part water cooling that water-cooling wall leaves angular region
On wall surface, primary air ejiction opening 4 and upper next air-flow ejiction opening 5, air-flow is respectively set in two sides up and down on adherent wind snout 1
Up and down both direction sprays or oblique ejection up and down；Adherent wind air duct is connected with the big bellows of Secondary Air, it is ensured that needs
Use air quantity；Adherent wind snout connects adherent wind air duct, and controllable register 3 is arranged on adherent wind air duct.Adherent wind controllable register 3 is used
Other wind air force is pasted to adjust separate unit, advantageously ensures that the momentum of impinging jet of the adherent wind of separate unit, can also realize difference by adjusting
The equilibrium of air quantity between adherent wind snout.
Preferably, three layers of primary air ejiction opening point, totally six, the ejection of primary air ejiction opening 4 air quantity ratio is big, and air-flow is water
Square to, spray air quantity ratio it is big, play a leading role；Upper 5 ejection air quantity ratio accounting of air-flow ejiction opening next time is small, exit flow
With horizontal direction air-flow it is at 45 °~90 °, primary and secondary air-flow ejiction opening totally three, play the role of expanding adherent wind sphere of action.
Preferably, the outlet primary air direction of adherent wind snout 1 keeps one with whole torch direction of rotation, that is, circle of contact in furnace
It causes, primary air direction is rotation counterclockwise.Horizontal primary air direction is consistent between the same layer spout arranged on same wall surface, is formed
Relay mode.Main rotation torch and flue gas stream to the action direction of adherent wind primary and secondary air-flow have acceleration prolong wall-cooling surface move ahead,
Press to wall surface or guide into and be detached from two kinds of directions of wall surface, be not in the adherent wind snout primary and secondary air-flow in angular region against main rotation torch and
The situation that flue gas stream causes range limited.
Preferably, adherent wind snout 1 is arranged after angular region certain distance A is left on boiler horizontal cross-section, that is, leaves oxidation
Property the stronger angular region of atmosphere, be sent into adherent air-flow in reducing atmosphere crescendo and stronger region；Adherent wind snout 1 at A
Increase after distance B and another adherent wind snout is set, the primary air ejiction opening of the adherent wind snout, upper next 5 side of air-flow ejiction opening
To identical as at A.The spout of subsequent setting plays in terms of providing adherent wind and guaranteeing that wall-cooling surface is formed about oxidizing atmosphere
The effect of collaboration and relay, airflow direction is consistent with First, and the water-cooling wall area of adherent general mood stream covering can be made to become larger in this way,
Adherent wind sphere of action can effectively be increased.To which the reducing atmosphere of water-cooling wall near-wall region effectively be mitigated or eliminated.With dampening
The high temperature corrosion of the enhancing of cold wall near-wall region oxidizing atmosphere, water-cooling wall can be effectively relieved, while mitigate or preventing water
Cold wall slagging.
Preferably, adherent wind snout 1 leaves water-cooling wall certain distance C, while making main airflow exit jet stream and wall-cooling surface
Between have certain angle α.By the setting of the two parameters, unfold adherent general mood stream, close to wall-cooling surface without regard to
It is influenced by excessive wall surface resistance, weakens main rotation torch and adherent wind primary and secondary air-flow is pressed to the work of wall surface by flue gas stream
With, weaken or prevent burning particles in flue gas stream from passing through adherent general mood stream reaching wall-cooling surface, while make main rotation torch and
Flue gas stream is easy to sweep along adherent wind primary and secondary air-flow, is detached from wall surface too early so that losing retaining wall prevents slagging, prevents high temperature corrosion
Effect.
As shown in figure 3, adherent wind snout 1 is mounted on boiler main burning area and top high-temperature and low-oxygen combustion section.To specific pot
Furnace is arranged N layers altogether, since the adherent wind snout 1 of each separate unit exports primary and secondary airflow direction primary air, upper next air-flow totally three sides
To the effect of comprehensive arrangement can effectively cover wall-cooling surface, play the oxidation for enhancing full burner hearth high-temperature and low-oxygen combustion wall-cooling surface
Property atmosphere, formed retaining wall air-flow, mitigate or prevent high temperature corrosion and slagging.
More adherent wind snouts 1 of set, water-cooling wall patch are set in preferred embodiment above-mentioned, on large-sized boiler same layer wall-cooling surface
Wall wind snout arranges that number of plies N is 2~5 layers.Reference is in boiler cross section equivalent diameter D, size A=(1/8~1/6) × D；Size
B=(1/4~1/3) × D；Dimensions above takes low value when adding adherent wind snout again.80~200mm of size C value range；Angle
3 °~12 ° of α value range；The vertical water-cooled wall face paste wall wind snout arrangement number of plies N of boiler is 2~5 layers.Present embodiment determines
Parameter setting, to a kind of adjustable adherent wind apparatus of relay-type described in the utility model, in the low nitrogen combustion generally implemented at present
In burning technology engineer application, the preferable effect for protecting wall-cooling surface, preventing slagging, preventing high temperature corrosion can be obtained.
It the foregoing is merely the embodiments of the present invention is illustrated, is not intended to limit the utility model, for ability
For the technical staff in domain, within the spirit and principle of the utility model, any modification, equivalent replacement, improvement
Deng should be included within the scope of protection of this utility model.
Claims (7)
1. a kind of adherent wind apparatus of adjustable relay-type, including adherent wind snout (1), adherent wind air duct (2), adherent wind adjusting gear
Plate (3), which is characterized in that the adherent wind snout (1) is arranged in wall surface and/or middle part wall-cooling surface that water-cooling wall leaves angular region
On, primary air ejiction opening (4) and upper next air-flow ejiction opening (5), adherent wind is respectively set in the upper and lower two sides of adherent wind snout (1)
The up and down both direction of spout air-flow sprays or oblique ejection up and down；Adherent wind air duct (2) is connected with the big bellows of Secondary Air
Logical, adherent wind snout (1) connects adherent wind air duct (2), and controllable register (3) are arranged on adherent wind air duct (2).
2. the adherent wind apparatus of adjustable relay-type according to claim 1, which is characterized in that primary air ejiction opening point three
Layer, totally six, primary air ejiction opening (4) ejection air quantity ratio is big, and air-flow is horizontal direction；Upper air-flow ejiction opening next time (5) is sprayed
Air output ratio accounting is small, exit flow and horizontal direction air-flow it is at 45 ° ~ 90 °.
3. the adherent wind apparatus of adjustable relay-type according to claim 1, which is characterized in that adherent wind snout (1) goes out
Mouth primary air direction is consistent with whole torch direction of rotation, that is, circle of contact in furnace, and primary air direction is rotation counterclockwise.
4. the adherent wind apparatus of adjustable relay-type according to claim 1, which is characterized in that on boiler horizontal cross-section from
Adherent wind snout (1) is arranged after angle of release area certain distance A；Increase after the adherent wind snout distance B at A and another adherent wind is set
Spout, the primary air ejiction opening (4) of the adherent wind snout, upper next air-flow ejiction opening (5) direction are identical as at A.
5. the adherent wind apparatus of adjustable relay-type according to claim 1, which is characterized in that adherent wind snout (1) is left
Water-cooling wall certain distance C, while making have certain angle α between main airflow exit jet stream and wall-cooling surface.
6. the adherent wind apparatus of adjustable relay-type according to claim 1, which is characterized in that adherent wind snout (1) installation
In boiler main burning area and top high-temperature and low-oxygen combustion section.
7. according to any adherent wind apparatus of adjustable relay-type of claim 3,4,5,6, which is characterized in that large-sized boiler
More set adherent wind snouts (1) are set on same layer wall-cooling surface, and the adherent wind snout arrangement number of plies N of water-cooling wall is 2 ~ 5 layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820878638.9U CN208886755U (en) | 2018-06-07 | 2018-06-07 | A kind of adherent wind apparatus of adjustable relay-type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820878638.9U CN208886755U (en) | 2018-06-07 | 2018-06-07 | A kind of adherent wind apparatus of adjustable relay-type |
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| CN208886755U true CN208886755U (en) | 2019-05-21 |
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| CN201820878638.9U Active CN208886755U (en) | 2018-06-07 | 2018-06-07 | A kind of adherent wind apparatus of adjustable relay-type |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274221A (en) * | 2019-06-25 | 2019-09-24 | 哈尔滨工业大学 | A kind of boiler preventing water wall high temperature corrosion |
| CN111720816A (en) * | 2020-06-19 | 2020-09-29 | 江苏方天电力技术有限公司 | High-temperature corrosion prevention nozzle for coal-fired power plant |
-
2018
- 2018-06-07 CN CN201820878638.9U patent/CN208886755U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274221A (en) * | 2019-06-25 | 2019-09-24 | 哈尔滨工业大学 | A kind of boiler preventing water wall high temperature corrosion |
| CN111720816A (en) * | 2020-06-19 | 2020-09-29 | 江苏方天电力技术有限公司 | High-temperature corrosion prevention nozzle for coal-fired power plant |
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