CN209180982U - A kind of energy saving and environment friendly overfire air device of grate firing boiler - Google Patents
A kind of energy saving and environment friendly overfire air device of grate firing boiler Download PDFInfo
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- CN209180982U CN209180982U CN201821982356.XU CN201821982356U CN209180982U CN 209180982 U CN209180982 U CN 209180982U CN 201821982356 U CN201821982356 U CN 201821982356U CN 209180982 U CN209180982 U CN 209180982U
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- secondary air
- air jet
- overfire air
- boiler
- overfire
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Abstract
A kind of energy saving and environment friendly overfire air device of grate firing boiler, it is related to grate firing boiler apparatus field.The problem of the utility model solves existing grate firing boiler furnace inner second air device in the presence of working medium is used air as, and excessive Secondary Air will increase excess air coefficient, increase heat loss due to exhaust gas, and improve the discharge amount of nitrogen, oxysulfide.The injection apparatus of the utility model is arranged in back-end ductwork, overfire air jet is provided in the Secondary Air main pipe of injection apparatus, overfire air jet is connected to the side wall of Secondary Air main pipe；Overfire air device further includes receiving section and Secondary Air jet pipe, Secondary Air jet pipe is arranged at boiler furnace aditus laryngis, the outlet end of Secondary Air jet pipe passes through the arch head of boiler rear arch and is directed toward in the middle part of boiler front arch, the arrival end of Secondary Air jet pipe is provided with receiving section, and the section that receives is an integral structure with Secondary Air jet pipe.The utility model reduces the discharge amount of nitrogen, oxysulfide for improving the grate firing boiler thermal efficiency.
Description
Technical field
The utility model relates to grate firing boiler apparatus fields, are specifically related to a kind of energy saving and environment friendly Secondary Air of grate firing boiler
Device.
Background technique
There are more CO, H in the middle part of sliding grate grate firing boiler2、CH4Equal fuel gas and the fuel particle not burnt,
Burner hearth will be escaped with flue gas if carried out completely burned not in burner hearth, cause thermal loss.
It is more existing to be used to improve boiler thermal efficiency technology, such as a kind of utility model patent " energy-saving grate firing boiler use
Furnace inner second air device " (China Patent No. 201720293343.0, Authorization Notice No. CN206648065U, call " file in the following text
One ") to solve the above problems, Secondary Air is arranged in burner hearth, the stirring that promotes flue gas strong with mix, make fuel gas, not
It burns particle and flying dust is mixed well with air and burnt, to reduce chemically incomplete combustion and solid imperfect combustion damage
It loses, improves boiler thermal efficiency.
Since Secondary Air is without fuel bed, working medium is such as used air as, excessive Secondary Air will increase excess air
Coefficient increases heat loss due to exhaust gas, and improves the discharge amount of nitrogen, oxysulfide.
In conclusion existing grate firing boiler furnace inner second air device, which exists, uses air as working medium, excessive two
The problem of secondary wind will increase excess air coefficient, increases heat loss due to exhaust gas, and improves the discharge amount of nitrogen, oxysulfide.
Utility model content
The utility model uses air as working medium to solve existing grate firing boiler furnace inner second air device presence,
Excessive Secondary Air will increase excess air coefficient, increase heat loss due to exhaust gas, and improve the discharge amount of nitrogen, oxysulfide
Problem, and then provide a kind of grate firing boiler energy saving and environment friendly overfire air device.
The technical solution of the utility model is:
A kind of energy saving and environment friendly overfire air device of grate firing boiler, the overfire air device includes injection apparatus, injection dress
It installs in the back-end ductwork of boiler rear arch top, injection apparatus includes Secondary Air main pipe and overfire air jet, Secondary Air main pipe
On be provided with overfire air jet, the overfire air jet is connected to the side wall of Secondary Air main pipe；
The overfire air device further includes receiving section and Secondary Air jet pipe, and Secondary Air jet pipe is arranged in boiler furnace aditus laryngis
Place, the boiler furnace aditus laryngis are located between boiler rear arch arch head and boiler front arch arch head, and the outlet end of Secondary Air jet pipe passes through
The arch head of boiler rear arch is simultaneously directed toward in the middle part of boiler front arch, and the arrival end of Secondary Air jet pipe is provided with receiving section, it is described receive section with
Secondary Air jet pipe is an integral structure.
Further, the overfire air device further includes partition wall water-cooling wall, and partition wall water-cooling wall is arranged in injection apparatus and cigarette
In back-end ductwork between gas outlet.
Further, partition wall water-cooling wall includes bare-tube wall and fin panel casing, and bare-tube wall is located at partition wall water cooling
The top of wall, fin panel casing are located at the lower part of partition wall water-cooling wall.
Further, the upper end of smoke outlet window is lower than the lower end surface of bare-tube wall.
Further, the side wall of Secondary Air main pipe is equipped at least one overfire air jet, and each overfire air jet is corresponding
One Secondary Air jet pipe.
Further, each Secondary Air jet pipe and the coaxial arrangement of the overfire air jet of corresponding setting.
Further, the injection apparatus further includes secondary air fan, butterfly valve and connecting tube, secondary air fan by connecting tube with
The connection of Secondary Air main pipe, the connecting tube are equipped with butterfly valve.
Further, receiving section is hollow necking tubular structure, receive the bore of section along its axis direction from front to back by
It is tapered small.
The utility model has the effect that compared with prior art
1, the utility model is that secondary air flow increases bring a series of problems when solving air as working medium, using air
Tail flue gas injection in furnace to burner hearth is reached into the ideal effect of setting Secondary Air as working fluid.By upsetting gas in furnace
Stream is allowed to reduce non-complete combustion of fuel heat loss from mixing.High-temperature flue gas leader tape in burner hearth is right to fire grate front end
Fuel, which ignites, plays facilitation.By the vortex centrifugation of air-flow, gets rid of the winged coal in part and melt down row, reduce the evolution for flying coal
Amount reduces the thermal loss that flying dust is taken away.In the identical situation of secondary air flow, with file one using pure air as working medium
The practice is compared, and the discharge amount of excess air coefficient and nitrogen, oxysulfide in burner hearth is reduced, while reducing the energy of secondary air fan
Consumption.
Detailed description of the invention
Fig. 1 is the energy-saving environmental protection layered burning boiler furnace inner second air apparatus structure schematic diagram of the utility model；
Fig. 2 is the injection apparatus of the utility model, the structural schematic diagram for receiving section and Secondary Air jet pipe；
Fig. 3 is the structural schematic diagram of injection apparatus.
Specific embodiment
Specific embodiment 1: illustrating present embodiment in conjunction with Fig. 1 and Fig. 2, a kind of grate firing boiler of present embodiment is used
Energy saving and environment friendly overfire air device, the overfire air device include injection apparatus 1, and injection apparatus 1 is arranged on boiler rear arch 3-1
In portion back-end ductwork 3-2, injection apparatus 1 includes Secondary Air main pipe 1-1 and overfire air jet 1-2, is arranged on Secondary Air main pipe 1-1
There are overfire air jet 1-2, the overfire air jet 1-2 to be connected to the side wall of Secondary Air main pipe 1-1；
The overfire air device further includes receiving section 2 and Secondary Air jet pipe 3, and Secondary Air jet pipe 3 is arranged in Boiler Furnace Lead
At mouth 3-3, the boiler furnace aditus laryngis 3-3 is located between boiler rear arch 3-1 arch head and boiler front arch 3-4 arch head, Secondary Air spray
The outlet end of pipe 3 passes through the arch head of boiler rear arch 3-1 and is directed toward in the middle part of boiler front arch 3-4, the arrival end setting of Secondary Air jet pipe 3
Have and receive section 2, the section 2 that receives is an integral structure with Secondary Air jet pipe 3.
Specific embodiment 2: embodiment is described with reference to Fig. 1, the overfire air device of present embodiment further includes
Partition wall water-cooling wall 4, partition wall water-cooling wall 4 are arranged in the back-end ductwork 3-2 between injection apparatus 1 and exhanst gas outlet.So set,
For the swabbing action for avoiding exhanst gas outlet negative pressure flue gas, partition wall water-cooling wall 4 is set between injection apparatus 1 and exhanst gas outlet, makes to spray
Flue gas is not at negative pressure state at injection device 1.Other compositions and connection relationship are same as the specific embodiment one.
Specific embodiment 3: embodiment is described with reference to Fig. 1, the partition wall water-cooling wall 4 of present embodiment includes light pipe
Water-cooling wall and fin panel casing, bare-tube wall are located at the top of partition wall water-cooling wall 4, and fin panel casing is located at partition wall water-cooling wall 4
Lower part.So set, tail flue gas enters from the gap between the adjacent tube bank of bare-tube wall receives section 2 and Secondary Air spray
Pipe 3.As shown in Figure 1, the position of A and B meaning is the cut-off rule of bare-tube wall and fin panel casing, the above are light pipe water coolings by A
Wall, the following are fin panel casings by B.Other compositions and connection relationship are the same as one or two specific embodiments.
Specific embodiment 4: embodiment is described with reference to Fig. 1, the top of the smoke outlet window 3-5 of present embodiment
End face is lower than the lower end surface of bare-tube wall.So set, avoiding the swabbing action of exhanst gas outlet negative pressure flue gas, fill injection
It sets flue gas at 1 and is not at negative pressure state.Other compositions and connection relationship are identical as specific embodiment one, two or three.
Specific embodiment 5: illustrate present embodiment in conjunction with Fig. 1 to Fig. 3, the Secondary Air main pipe 1-1's of present embodiment
Side wall is equipped at least one overfire air jet 1-2, the corresponding Secondary Air jet pipe 3 of each overfire air jet 1-2.So set
It sets, the selection of the quantity and spacing of Secondary Air jet pipe 3 should make the perturbing area of Secondary Air be full of the transversal of entire burner hearth as far as possible
Face, the size and air outlet velocity of Secondary Air jet pipe 3 depend primarily on the desired Secondary Air range reached.It can be by changing two
Secondary wind nozzle 1-2 and quantity, spacing, the jet size of Secondary Air jet pipe 3 etc., comply with specific practical situations.It is other
Composition and connection relationship and specific embodiment one, two, three or four are identical.
Specific embodiment 6: embodiment is described with reference to Fig. 2, each Secondary Air jet pipe 3 of present embodiment and with
Its overfire air jet 1-2 being correspondingly arranged coaxial arrangement.So set, guaranteeing that the air flowed out from overfire air jet 1-2 is smooth
Into receiving section 2, the lower tail flue gas of entrainment pressure (driving fluid).Other compositions and connection relationship and specific embodiment
One, two, three, four or five are identical.
Specific embodiment 7: embodiment is described with reference to Fig. 3, the injection apparatus 1 of present embodiment further includes
Secondary air fan 1-3, butterfly valve 1-4 and connecting tube 1-5, secondary air fan 1-3 are connect by connecting tube 1-5 with Secondary Air main pipe 1-1, institute
Connecting tube 1-5 is stated equipped with butterfly valve 1-4.So set, the air outlet velocity of overfire air jet 1-2 can be carried out by butterfly valve 1-4
It adjusts.Other compositions and connection relationship and specific embodiment one, two, three, four, five or six are identical.
Specific embodiment 8: embodiment is described with reference to Fig. 2, the receiving section 2 of present embodiment is hollow necking pipe
Shape structure, the bore for receiving section 2 are gradually reduced from front to back along its axis direction.So set, receiving section 2 for entrainment pressure
Lower tail flue gas (driving fluid).Other compositions and connection relationship and specific embodiment one, two, three, four, five, six or
Seven is identical.
Working principle
In conjunction with Fig. 1 to Fig. 3 explanation working principle of the utility model is: air (working fluid) through Secondary Air main pipe 1-1 with
Certain pressure and speed enters overfire air jet 1-2, and speed increases in overfire air jet 1-2, pressure decline.Air with compared with
High speed is flowed out from overfire air jet 1-2, into receiving section 2, the lower tail flue gas of entrainment pressure (driving fluid).Air
Enter the laggard scanning frequency degree equilibrium of Secondary Air jet pipe 3 with flue gas, and with the raising of pressure.Entire injection process is by the pressure of air
Power can be changed into kinetic energy, and part of kinetic energy passes to flue gas, and the kinetic energy of fluid-mixing turns on the contrary again in Secondary Air jet pipe 3
Become pressure energy, to improve the pressure of fluid-mixing.Using a small amount of air as working fluid, injection tail flue gas
Under state, it is improved the Secondary Air air quantity into burner hearth, temperature.
Claims (8)
1. a kind of energy saving and environment friendly overfire air device of grate firing boiler, the overfire air device includes injection apparatus (1), injection dress
Set (1) be arranged in boiler rear arch (3-1) top back-end ductwork (3-2), injection apparatus (1) include Secondary Air main pipe (1-1) and
Overfire air jet (1-2) is provided with overfire air jet (1-2) in Secondary Air main pipe (1-1), the overfire air jet (1-2) with
The side wall of Secondary Air main pipe (1-1) is connected to；
It is characterized by: the overfire air device further includes receiving section (2) and Secondary Air jet pipe (3), Secondary Air jet pipe (3) setting
At boiler furnace aditus laryngis (3-3), the boiler furnace aditus laryngis (3-3) is located at boiler rear arch (3-1) arch head and boiler front arch (3-
4) encircle between head, the outlet end of Secondary Air jet pipe (3) passes through the arch head of boiler rear arch (3-1) and is directed toward in boiler front arch (3-4)
Portion, the arrival end of Secondary Air jet pipe (3), which is provided with, to be received section (2), and receive section (2) and Secondary Air jet pipe (3) are integral type
Structure.
2. a kind of energy saving and environment friendly overfire air device of grate firing boiler according to claim 1, it is characterised in that: described two
Secondary wind apparatus further includes partition wall water-cooling wall (4), the tail that partition wall water-cooling wall (4) is arranged between injection apparatus (1) and exhanst gas outlet
In portion's flue (3-2).
3. a kind of energy saving and environment friendly overfire air device of grate firing boiler according to claim 2, it is characterised in that: partition wall water
Cold wall (4) includes bare-tube wall and fin panel casing, and bare-tube wall is located at the top of partition wall water-cooling wall (4), film-type water-cooling
Wall is located at the lower part of partition wall water-cooling wall (4).
4. a kind of energy saving and environment friendly overfire air device of grate firing boiler according to claim 3, it is characterised in that: flue gas goes out
The upper end of mouth window (3-5) is lower than the lower end surface of bare-tube wall.
5. a kind of energy saving and environment friendly overfire air device of grate firing boiler according to claim 1, it is characterised in that: Secondary Air
The side wall of main pipe (1-1) is equipped at least one overfire air jet (1-2), and each overfire air jet (1-2) corresponding one secondary
Wind jet pipe (3).
6. a kind of energy saving and environment friendly overfire air device of grate firing boiler according to claim 5, it is characterised in that: each two
The coaxial arrangement of the overfire air jet (1-2) of secondary wind jet pipe (3) and corresponding setting.
7. a kind of energy saving and environment friendly overfire air device of grate firing boiler according to claim 1, it is characterised in that: the spray
Injection device (1) further includes secondary air fan (1-3), butterfly valve (1-4) and connecting tube (1-5), and secondary air fan (1-3) passes through connecting tube
(1-5) is connect with Secondary Air main pipe (1-1), and the connecting tube (1-5) is equipped with butterfly valve (1-4).
8. a kind of energy saving and environment friendly overfire air device of grate firing boiler according to claim 1, it is characterised in that: receive section
It (2) is hollow necking tubular structure, the bore for receiving section (2) is gradually reduced from front to back along its axis direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821982356.XU CN209180982U (en) | 2018-11-28 | 2018-11-28 | A kind of energy saving and environment friendly overfire air device of grate firing boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821982356.XU CN209180982U (en) | 2018-11-28 | 2018-11-28 | A kind of energy saving and environment friendly overfire air device of grate firing boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209180982U true CN209180982U (en) | 2019-07-30 |
Family
ID=67374792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821982356.XU Active CN209180982U (en) | 2018-11-28 | 2018-11-28 | A kind of energy saving and environment friendly overfire air device of grate firing boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209180982U (en) |
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2018
- 2018-11-28 CN CN201821982356.XU patent/CN209180982U/en active Active
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