CN209130844U - A kind of tubular full premix low-NO_x emission - Google Patents
A kind of tubular full premix low-NO_x emission Download PDFInfo
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- CN209130844U CN209130844U CN201821621703.6U CN201821621703U CN209130844U CN 209130844 U CN209130844 U CN 209130844U CN 201821621703 U CN201821621703 U CN 201821621703U CN 209130844 U CN209130844 U CN 209130844U
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- economizer
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- membrane wall
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Abstract
The utility model provides a kind of tubular premixes low NO entirelyxBoiler, including blower (1), burner (2), outlet flue (3), upper annular header (4), watering cycle device (5), economizer (6), lower annular header (7), admission port (8), venthole (9), inner ring membrane wall pipe (10), centre circle finned tube (11), outer ring membrane wall pipe (12), insulating layer (13) and flame retardant coating (14).The utility model expands heating surface by the structure optimization and integrated design to ontology, burner, economizer so that overall structure land occupation more compact less, standardization level it is high, high-efficient；Optimize coal economizer structure, substantially reduces economizer space occupied；Meanwhile optimizing economizer flue gas passage structure, greatly improve the heat transfer utilization rate of ontology and economizer；In addition, the carbonated drink connection of optimization economizer, reduces dead zone and interface, reduces the possibility of oxygen corrosion, improve economizer service life.
Description
Technical field
The utility model belongs to gas-steam boiler technical field, and in particular to one kind is tubular to premix low NO entirelyxSteam
Boiler.
Background technique
Through-flow boiler is widely used, late 1990s are introduced into China derived from Germany in Japan.Due to the boiler
Compact-sized, steel consumption is low, small in size, speed of steaming is fast, is particularly suitable for hotel, market, cell and the industrial and mineral for needing a small amount of steam
Enterprise, general evaporation capacity are no more than 4t/h.
Through-flow boiler is made of longer pipe of design arrangement, and feed pump is in the water supply of pipe one end, and water (working medium) is in pipe
Interior process plus hot water section, evaporator section, (superheat section) generate required steam from pipe upper collecting chamber.It is different from vertical water-tube
Natural circulation boiler.Through-flow boiler does not have drum, it is by boiler body (lower header, tubulation etc. form on ontology) and outside
The components such as steam-water separator, water pump, burner composition.It is exactly substantially vertical straight water-tube boiler.
The structure of through-flow boiler determines its performance characteristics.It has following main feature: 1. water capacity is few, so generating
Steam is fast, and generally steaming only needs 5min or so.2. since tubulation can be with free arrangement, compact-sized, superior's formula centre chamber
Combustion, greatly reduces volume, but boiler furnace volume heat load is big, and water is completed to be heated to evaporate in a pipe, circulation
Multiplying power is low, and close to 1, and water vaporizes concentration in pipe, and salt is easy knot in tube wall in water, easily leads to heat transfer deterioration, generates
The failures such as booster and fatigue crack, so needing strict control tube wall temperature in range of safety operation water quality requirement height.③
Since to be gathered burner hearth smaller for structure, so using conventional low NOxNO can not be effectively reduced in burnerxGeneration.4. since structure is tight
It gathers, so ontology heat exchange area is limited, general ontology outlet smoke temperature needs to reach 300~350 DEG C, not with China's Energy Efficiency Standard
Symbol, needs one biggish economizer of postposition, to further decrease exhaust gas temperature.Since economizer institute band thermic load is larger, and
The often discontinuous stable operation of this boiler, is easy to vaporize economizer, so the service life of economizer is generally shorter.5. by
In its disengagement surface in pipe, specific location is relatively fuzzyyer, defines so bad to " lowest safe waterline "；Upper annular simultaneously
Header is smaller, and steam quality is poor, needs external water separator.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the utility model provides a kind of tubular full premix
Low NOxSteam boiler expands heating surface by the structure optimization and integrated design to ontology, burner, economizer, so that
Overall structure land occupation more compact less, standardization level it is high, high-efficient.
Technical solution:
One kind is tubular to premix low NO entirelyxBoiler, it is characterised in that: including blower, burner, outlet flue, upper annular collection
Case, watering cycle device, economizer, lower annular header, admission port, venthole, inner ring membrane wall pipe, centre circle finned tube, outer ring
Membrane wall pipe, insulating layer and flame retardant coating；
The burner is mounted on center in boiler body, and the assembling is above the burner, in institute
It states boiler body high inside and has installed annular header, installed lower annular header in the boiler body low inside,
The combustor external is successively arranged inner ring membrane wall pipe, centre circle finned tube, outer ring membrane wall pipe and insulating layer, the inner ring film
Formula wall pipe, centre circle finned tube, outer ring membrane wall pipe upper and lower end be connected to respectively with the upper and lower annular header；In the pot
Furnace body low inside is equipped with flame retardant coating above the lower annular header, and fuel gas inlet and igniting are equipped on the burner
Fire inspection integrating device；Side is additionally provided with economizer in the boiler body, and the economizer bottom is communicated with admission port, in institute
It states and is equipped with watering cycle device at the top of economizer；Outlet flue is additionally provided with above the economizer；On the boiler body also
Equipped with the venthole being connected to the upper annular header.
The burner uses film-type water-cooling fire grate structure, by surrounding the vertical water pipe of cylindrical structure and its interior welding therewith
The porous plate composition connect；The vertical water pipe bending two ends are simultaneously connected to upper and lower annular header.
The burner top is equipped with mixing arrangement and current equalizer.
The economizer uses integrated design, including upper and lower flexure type header, 1-2 row's spiral fin coil and outside with curved
Bent coaming plate；The header of bending up and down uses tube bending camber, and is close to the outer arc cloth of the upper and lower annular header
It sets；With 1-2 row's spiral fin coil connection between bending header up and down；Cigarette is formed with bending coaming plate on the outside of the spiral fin coil
Gas channel；The outlet pipe of the economizer is connect with the watering cycle device, the watering cycle device directly with boiler sheet
Body water inlet pipe is welded to connect.
The watering cycle device includes water supply water distributor, and the water supply water distributor is connected to the annular upper collecting chamber；?
Partition is set among the membrane wall pipe of outer ring, the water pipe channel of the outer ring membrane wall pipe is divided into two, the not heated semicircle in outside
As down-comer, inside is heated semicircle as tedge.
The water supply water distributor is equipped with the aperture of alignment down-comer.
The centre circle finned tube fin material uses high temperature resistant stainless steel.
The utility model has the advantages that
1, the utility model is expanded heated by the structure optimization and integrated design to ontology, burner, economizer
Face so that overall structure land occupation more compact less, standardization level it is high, high-efficient；Optimize coal economizer structure, substantially reduction saves coal
Device space occupied；Meanwhile optimizing economizer flue gas passage structure, greatly improve the heat transfer utilization rate of ontology and economizer；In addition,
The carbonated drink connection for optimizing economizer, reduces dead zone and interface, reduces the possibility of oxygen corrosion, improve economizer service life.
2, boiler structural features of the utility model according to through-flow, optimization water-cooled grate design, in diminution size of burner hearth
Meanwhile increasing burner hearth effective heating surface product；The low NO of film-type water-cooling is utilized simultaneouslyxCombustion technology, so that NOxDischarge is lower than 30mg/
m3。
4, the utility model is slightly modified using existing structure by optimizing water cyclic design, and it is dynamic just to improve water circulation
Power greatly improves requirement of the boiler to water quality, the service life of prolonged boiler.
Detailed description of the invention
Fig. 1 is that the tubular of the utility model premixes low NO entirelyxThe main view of steam boiler.
Fig. 2 is that the tubular of the utility model premixes low NO entirelyxThe top view of steam boiler.
Fig. 3 is the burner structure figure of the utility model；Wherein, Fig. 3 a is burner structure figure, and Fig. 3 b is the AA of Fig. 3 a
Sectional view.
Fig. 4 is the coal economizer structure figure of the utility model；Wherein, Fig. 4 a is coal economizer structure figure, and Fig. 4 b is the AA of Fig. 4 a
Sectional view.
Fig. 5 is the watering cycle device figure of the utility model；Wherein, Fig. 5 a is water circle device structure chart, and Fig. 5 b is combustion
Burner external structure.
Wherein appended drawing reference are as follows: blower 1, burner 2, outlet flue 3, upper annular header 4, watering cycle device 5, economizer
6, lower annular header 7, admission port 8, venthole 9, inner ring membrane wall pipe 10, centre circle finned tube 11, outer ring membrane wall pipe 12, heat preservation
Layer 13, flame retardant coating 14, fuel gas inlet 15, igniting fire inspection integrating device 16, mixing arrangement 17, current equalizer 18, vertical water pipe 19,
Porous plate 20, upper and lower flexure type header 21, spiral fin coil 22, outside bending coaming plate 23, water supply water distributor 24, partition 25.
Specific embodiment
The utility model is further described with reference to the accompanying drawing.
As shown in attached drawing 1,2, one kind of the utility model is tubular to premix low NO entirelyxSteam boiler includes blower 1, burning
It is device 2, outlet flue 3, upper annular header 4, watering cycle device 5, economizer 6, lower annular header 7, admission port 8, venthole 9, interior
Enclose membrane wall pipe 10, centre circle finned tube 11, outer ring membrane wall pipe 12, insulating layer 13 and flame retardant coating 14.The burner 2 is installed
The center in boiler body, the blower 1 is mounted on 2 top of burner, in boiler body internal upper part position
Equipped with upper annular header 4, lower annular header 7 is installed in the boiler body low inside, outside the burner 2 successively
Equipped with inner ring membrane wall pipe 10, centre circle finned tube 11, outer ring membrane wall pipe 12 and insulating layer 13, as shown in Fig. 5 a, 5b；In described
Enclose membrane wall pipe 10, centre circle finned tube 11, outer ring membrane wall pipe 12 upper and lower end respectively with the upper and lower annular header 4,7
Connection；Flame retardant coating 14 is equipped with above the lower annular header 7 in the boiler body low inside, in the boiler body
Interior side is additionally provided with economizer 6, and 6 bottom of economizer is communicated with admission port 8, follows at the top of the economizer 6 equipped with water supply
Loop device 5；Outlet flue 3 is additionally provided with above the economizer 6；It is additionally provided on the boiler body and collects with the upper annular
The venthole 9 that case 4 is connected to.
The utility model utilizes mode water cooling combustion technology, reduces size of burner hearth；Using inner ring membrane wall pipe 10, in
It encloses finned tube 11 and outer ring membrane wall pipe 12 this three encloses pipe structure, be added significantly to the convection heating surface product of boiler, improve
The efficiency of boiler body reduces ontology outlet smoke temperature (actual measurement rated load smoke temperature is at 220 DEG C or so), alleviates economizer 6
Load, reduce economizer 6 vaporize possibility；Utilize the economizer 6 being close on the outside of boiler and the outlet flue 3 for being built in boiler internal
Structure reduces boiler land occupation so that boiler is more compact.11 fin material of centre circle finned tube is stainless using high temperature resistant
Steel effectively increases finned tube service life.
Fig. 3 a is burner structure figure.As depicted in figure 3 a, using the low NO of film-type water-coolingxCombustion technology.The utility model
Burner use film-type water-cooling fire grate structure, by surround cylindrical structure vertical water pipe 19 and its it is interior weld therewith it is porous
Plate 20 forms, as shown in Figure 3b；19 bending two ends of vertical water pipe are simultaneously connected to upper and lower annular header 4,7.In the burning
It is equipped with mixing arrangement 17 and current equalizer 1 at the top of device 2, blower 1 is equipped with above the burner 2；On the burner 2 also
Equipped with igniting fire inspection integrating device 16 and fuel gas inlet 15.Air and combustion gas are sufficiently mixed by mixing arrangement 17, then by equal
Gaseous mixture is uniformly sent to 20 inside of porous plate by stream device 18, and gaseous mixture is entered in burner hearth by aperture high speed by point
Combustion, conflagration form small flare.The high-speed flow volume sprayed from fire hole inhales periphery flue gas and returns to flame root, while by membrane type
Water-cooled grate is cooling, and under the action of the recycling of this inner flue gas of the stove, ignition temperature is reduced to 1500 DEG C hereinafter, making NOxRow
It puts and is greatly reduced, in addition the effect of premix conflagration entirely, surveys NOxDischarge is in 30mg/m3Hereinafter, even lower.
As shown in attached drawing 4a, 4b, the economizer 6 uses integrated design, including upper and lower flexure type header 21,1-2 to arrange
Spiral fin coil 22 and outside bending coaming plate 23.The header 21 of bending up and down uses tube bending camber, and is close to institute
State the outer arc arrangement of upper and lower annular header 4,7；It is connected between bending header 21 up and down with 1-2 row's spiral fin coil 22；
Exhaust gases passes are formed with bending coaming plate 23 on the outside of spiral fin coil 22.The 6 exhaust gases passes size of economizer and ontology convective region
Exhaust gases passes depth of section is identical, this, which allows for sweep of gases, does not have dead zone, on the one hand to reduce or eliminate pneumatic noise；It is another
Aspect improves convective region heat-transfer surface flue gas heat transfer usage factor.The economizer 6 is designed to curved shape, it on the one hand can be tight
Boiler body arrangement is pasted, heat preservation is shared and reduces land occupation；On the other hand it can increase flow perturbation, augmentation of heat transfer.The economizer 6
Water supply use the structure of bottom in and top out, the outlet pipe of the economizer 6 connect with the watering cycle device 3, the water supply
Circulator 3 is directly welded to connect with boiler body water inlet pipe, is reduced leakage point, is particularly suitable for small-sized through-flow boiler, is interrupted
The characteristics of operation, reduces the blowing out corrosion of the economizer 6.
As shown in Fig. 5, the watering cycle device 5 includes water supply water distributor 24 and partition 25.Mainly by former through-flow
The lower header watering mode of furnace, is changed to upper collecting chamber water supply.And using existing structure optimization design as decline tube passage: in outer ring
Among membrane wall pipe 12 be arranged partition 25, the water pipe channel of the outer ring membrane wall pipe 12 is divided into two, using outside not by
For hot semicircle as down-comer, inside is heated semicircle as tedge, so that the Natural Circulation of water may be implemented in boiler.In addition,
The aperture that the water supply water distributor 24 of connection boiler feedwater is equipped with alignment down-comer is introduced furnace water by water supply injection principle
In down-comer, Water circulation hydrodynamics are improved, water circulating ratio when by metered flow is controlled at 10 times or more.This optimization sufficiently benefit
Boiler water vaporous environment is greatly improved under the premise of separately not setting down-comer with the structure of existing boiler, improves the pot
Furnace increases the service life of boiler to water quality adaptability.
The above is only the preferred embodiment of the utility model, it should be pointed out that: for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the protection scope of the utility model.
Claims (7)
1. one kind is tubular to premix low NO entirelyxBoiler, it is characterised in that: including blower (1), burner (2), outlet flue (3), on
Annular header (4), watering cycle device (5), economizer (6), lower annular header (7), admission port (8), venthole (9), inner ring
Membrane wall pipe (10), centre circle finned tube (11), outer ring membrane wall pipe (12), insulating layer (13) and flame retardant coating (14)；
The burner (2) is mounted on center in boiler body, and the blower (1) is mounted on above the burner (2),
Upper annular header (4) have been installed in the boiler body high inside, have installed lower annular in the boiler body low inside
Header (7) is successively arranged inner ring membrane wall pipe (10), centre circle finned tube (11), outer ring membrane wall outside the burner (2)
Manage (12) and insulating layer (13), the inner ring membrane wall pipe (10), centre circle finned tube (11), outer ring membrane wall pipe (12) it is upper,
Lower end is connected to the upper annular header (4), lower annular header (7) respectively；In the boiler body low inside in described
Flame retardant coating (14) are equipped with above lower annular header (7), fuel gas inlet (15) and igniting fire inspection collection are equipped on the burner (2)
At device (16)；Side is additionally provided with economizer (6) in the boiler body, and economizer (6) bottom is communicated with admission port
(8), watering cycle device (5) are equipped at the top of the economizer (6)；Outlet flue is additionally provided with above the economizer (6)
(3)；The venthole (9) being connected to the upper annular header (4) is additionally provided on the boiler body.
2. according to claim 1 tubular low NO is premixed entirelyxBoiler, it is characterised in that: the burner (2) uses film
Formula water-cooled grate structure is made of the vertical water pipe (19) and its interior porous plate (20) welded therewith that surround cylindrical structure；
Vertical water pipe (19) bending two ends are simultaneously connected to upper annular header (4) and lower annular header (7).
3. according to claim 2 tubular low NO is premixed entirelyxBoiler, it is characterised in that: at the top of the burner (2)
Equipped with mixing arrangement (17) and current equalizer.
4. according to claim 1 tubular low NO is premixed entirelyxBoiler, it is characterised in that: the economizer (6) uses one
Bodyization design, including upper and lower flexure type header (21), 1-2 row spiral fin coil (22) and outside bending coaming plate (23)；It is described
Upper and lower flexure type header (21) uses tube bending camber, and is close to the upper annular header (4), lower annular header (7)
Outer arc arrangement；With 1-2 row spiral fin coil (22) connection between upper and lower flexure type header (21)；The spiral fin coil
(22) outside forms exhaust gases passes with bending coaming plate (23)；The outlet pipe of the economizer (6) and the watering cycle device (5)
Connection, the watering cycle device (5) are directly welded to connect with boiler body water inlet pipe.
5. according to claim 1 tubular low NO is premixed entirelyxBoiler, it is characterised in that: the watering cycle device (5)
Including water supply water distributor (24), the water supply water distributor (24) is connected to the upper annular header (4)；In outer ring membrane wall pipe
(12) intermediate that partition (25) are set, the water pipe channel of the outer ring membrane wall pipe (12) is divided into two, the not heated semicircle in outside
As down-comer, inside is heated semicircle as tedge.
6. according to claim 5 tubular low NO is premixed entirelyxBoiler, it is characterised in that: on the water supply water distributor (24)
Aperture equipped with alignment down-comer.
7. according to claim 1 tubular low NO is premixed entirelyxBoiler, it is characterised in that: centre circle finned tube (11) wing
Sheet material uses high temperature resistant stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821621703.6U CN209130844U (en) | 2018-09-30 | 2018-09-30 | A kind of tubular full premix low-NO_x emission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821621703.6U CN209130844U (en) | 2018-09-30 | 2018-09-30 | A kind of tubular full premix low-NO_x emission |
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| Publication Number | Publication Date |
|---|---|
| CN209130844U true CN209130844U (en) | 2019-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821621703.6U Active CN209130844U (en) | 2018-09-30 | 2018-09-30 | A kind of tubular full premix low-NO_x emission |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109442366A (en) * | 2018-09-30 | 2019-03-08 | 江苏双良锅炉有限公司 | One kind is tubular to premix low NO entirelyxBoiler |
| CN111981455A (en) * | 2020-08-10 | 2020-11-24 | 浙江特富发展股份有限公司 | Forced recirculation water pipe steam boiler system and operation method thereof |
-
2018
- 2018-09-30 CN CN201821621703.6U patent/CN209130844U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109442366A (en) * | 2018-09-30 | 2019-03-08 | 江苏双良锅炉有限公司 | One kind is tubular to premix low NO entirelyxBoiler |
| CN111981455A (en) * | 2020-08-10 | 2020-11-24 | 浙江特富发展股份有限公司 | Forced recirculation water pipe steam boiler system and operation method thereof |
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