CN106052113A - Symmetrical film wall type vacuum hot water boiler and heating method thereof - Google Patents
Symmetrical film wall type vacuum hot water boiler and heating method thereof Download PDFInfo
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Abstract
The invention relates to a symmetrical film wall type vacuum hot water boiler and a heating method thereof. Smoke in a hearth conducts heating on the two sides of a film type wall transversely in a snake shape in a washing mode correspondingly. According to the method, heat of the smoke is fully used, and heat loss is reduced. Through transverse washing design, the height of the film type wall can be controlled reasonably, thus the boiler can be placed in a low space such as a basement. Through the design, the outlet temperature of the smoke can be directly lowered to 120-130 DEG C, thus heating temperature in the boiler is ensured, the effect that heat loss is reduced to the minimum is also ensured, and the heat efficiency of the boiler can reach 95% or above.
Description
Technical field
The present invention relates to vacuum hot water boiler field, particularly a kind of film-type wall-type vacuum hot water boiler and heating thereof
Method.
Background technology
The full name of vacuum boiler is called phase change vacuum boiler.Vacuum boiler is to form one at the furnace interior closed
The vacuum environment of negative pressure, fills heat medium water in body, by burning or alternate manner heating heat medium water, then by
In heat medium water evaporation, condensation to heat exchanger, then heated the water needing to heat by heat exchanger.Vacuum boiler passes through
Evacuation, forms a lower pressure environment almost without air, then utilizes water under low pressure (subatmospheric)
Low-temperature boiling produces steam, and the principle exported by heat by soda pop condensation heat transfer mode is worked.Vacuum boiler
Interior heat medium water is the high purity water through the special handling such as deoxidation, scale removal, has once filled, make before dispatching from the factory
Used time, in the internal closed circulation of unit (vaporization → condense → vaporization), does not increases, does not reduces, use at unit
Need not in life-span supplement or change.
In boiler thermal output refers to the unit interval, boiler effectively utilizes heat to account for the percentage ratio of boiler input heat, combustion
The heat of boiler sent into by material, and wherein most is absorbed by boiler heating surface, produces steam.This is utilized
Efficient heat, and another part thermal loss falls, this partial heat is referred to as heat loss, improves the thermal effect of boiler
Rate reduces boiler various heat losses exactly, and in modern boiler, the primary emphasis of heat loss of boiler to be reduced reduces exactly
Boiler exhaust gas heat loss.In conventional boiler, exhaust gas temperature is typically at 160-250 DEG C.
Body of heater is the Dewar vessel sealed, and some heat loss depends on external thermal insulation.For reducing this part heat
Loss, someone develops film-type wall-type vacuum hot water boiler.Membrane wall is also known as fin panel casing.Fin panel casing
Being exactly the water-cooling wall all covered by heating surface, it has two kinds of forms: 1, close arranging pipe membrane wall, and 2, extended surface tube
Membrane wall, the radiation that close arranging pipe membrane wall is covered with inboard wall of burner hearth by a pipe close-packed arrays suffering is subject to
Hot side, extended surface tube membrane wall is covered the radiation heating-surface with inboard wall of burner hearth by band steel welding between pipe and pipe, than
Close arranging pipe membrane wall air-tightness is good, and the boiler tube consumption of higher price is few a little, but it adds than close arranging pipe membrane wall
Work difficulty is big, and processing charges are high.
China Patent No. ZL95218017.0 utility model patent description has recorded a kind of Vacuum Heat without furnace wall
Homogeneous solution-type reactor, burner hearth and the flue wall of this boiler be made up of membrane wall, as shown in Figure 1, the cigarette in this boiler
Gas washes away for parallel baffled, and side is monolayer film type wall, and opposite side is multilayer film type wall.
Authorization Notice No. be CN203797949U Chinese utility model patent in disclose a kind of integral type membrane type
Wall condensate vacuum hot-water boiler, is carried on the back wet back of the body membrane wall heating surface after set is welded to form by water pipe, band steel and rear wet water
Structure constitutes one group of bilayer membrane wall, shown in accompanying drawing 2, it is provided that boiler thermal output to more than 93%, specified row
Cigarette temperature is down to less than 170 DEG C.
This kind of boiler is simply simply designed production by above film-type wall-type vacuum hot water boiler, not
Deeper research is made in terms of the thermal efficiency.
Summary of the invention
The technical problem to be solved is to provide the heating of a kind of symmetrical film-type wall-type vacuum hot water boiler
Method, the flue gas in burner hearth heats in Serpentis type transversal flow in membrane wall lateral symmetry.
Preferably, the flue gas in burner hearth is in the lateral symmetry ground serpentine-like transversal flow heating of three backhaul membrane walls.
Preferably, the eroding velocity Wg ∈ [6,12] of described flue gas.
Another technical problem to be solved by this invention is to provide a kind of symmetrical film-type wall-type vacuum hot water boiler,
Including vacuum heat-exchanger rig and heater, vacuum heat-exchanger rig includes front water chamber, U-shaped housing and after
Hydroecium, and it is arranged on the water inlet tubing string on front water chamber and rear hydroecium and water outlet tubing string, there is upper cover in U-shaped housing
Plate, the forward and backward tube sheet of heat exchanger is placed on upper cover plate, and Tube Sheet of Heat Exchanger is arranged on the forward and backward tube sheet of described heat exchanger,
Having exhaust tube on described U-shaped housing, U-shaped housing is provided with demolition set, the bottom of Tube Sheet of Heat Exchanger connects
Hydroecium steam trap connection, described heater is had to include upper water box, lower header and the stove being clipped between lower header
Thorax, described burner hearth porch is provided with burner attachment means, and burner hearth inside circumference uses symmetrical membrane wall to make
For flue wall.
Preferably, the membrane wall of described symmetry is that three symmetrical backhaul membrane walls are as flue wall.
Preferably, described three backhaul membrane wall the first backhauls, by being positioned at the membrane wall I of inlet face, are positioned at cuboid
The membrane wall II of burner hearth two sides and the membrane wall V with inlet face opposite face surround；Second backhaul is by membrane wall II
Fold with membrane wall III and form；3rd backhaul both sides are folded by membrane wall III and membrane wall IV and membrane wall V He
Membrane wall VI folds and forms.
Preferably, described first backhaul membrane type wall heating surface area is often to steam ton 3-8m2。
Preferably, described first backhaul membrane type wall heating surface area is often to steam ton 4-6m2。
Preferably, the described three each backhauls of backhaul membrane wall have the smoke inlet, the width of described smoke inlet to be
W=B × (Vg+R) × [(t1+t2+t3)/3+273]/(3600 × Wg × 273 × H), wherein B is fuel
Consumption；Vg is actual exhaust gas volumn；R is the penalty coefficient of actual exhaust gas volumn；T is flue certain some temperature interior；
Wg is velocity of flue gas；H is exhaust gases passes height.
Preferably, in described 3rd backhaul two keep away and on face, be provided with flow spoiler.
Preferably, bottom the left and right sides of the burner hearth of described 3rd backhaul, it is separately installed with steam trap connection.
Being three backhaul membrane walls inside burner hearth, by special design, flue gas is respectively in the three of burner hearth both sides
After forming transversal flow formation Serpentis type track route in backhaul pattern wall, finally carried out fume emission by outlet.This
Plant design, have several advantage.
1, make full use of the heat of flue gas, reduce heat loss；
2, the design of transversal flow can make boiler can be placed on space low with the height of conservative control membrane wall
In short space, such as basement.
3, this design can make the outlet temperature of flue gas directly be down to 120 DEG C-130 DEG C, in i.e. ensure that boiler
Heating-up temperature, in turn ensure that and thermal loss is down to minimum, boiler thermal output can reach more than 95%.
Accompanying drawing explanation
Fig. 1 is the membrane wall schematic diagram in China Patent No. ZL95218017.0 utility model patent；
Fig. 2 be Authorization Notice No. be the Chinese utility model patent membrane wall schematic diagram of CN203797949U；
Fig. 3 is the front view of film-type wall-type vacuum hot water boiler of the present invention；
Fig. 4 is the left view of film-type wall-type vacuum hot water boiler；
Fig. 5 is the right view of film-type wall-type vacuum hot water boiler lower part；
Fig. 6 is the profile of Fig. 3 burner hearth；
Fig. 7 is the profile of the membrane wall of band flow spoiler；
The membrane wall front view of Fig. 8 band flow spoiler；
Fig. 9 is the profile of Fig. 7 membrane wall；
Figure 10 combustor steam trap connection side view；
Figure 11 combustor steam trap connection top view；
Figure 12 is the partial enlarged drawing of Fig. 6；
1. lower header；2. front water chamber；3. upper water box；4. hanger；5.U shell body；6. blasting piece device；7.
Fixed plate；8. gripper shoe；9. Tube Sheet of Heat Exchanger；10. the forward and backward tube sheet of heat exchanger；Hydroecium after 11.；12. burnings
Device attachment means；13. allow pipe；14. membrane walls I；15. band steels；16. membrane walls II；17. membrane walls III；
18. membrane walls IV；19. band steels；20. membrane walls V；21. steel pipes；22. exhanst gas outlet devices；23. exhaust tubes；
24. hydroecium steam trap connections；25. flue gas shroudings；26. lower header drain pipes；27. steam trap connections；270. hydrophobic dresses
Posting port；271. groove；272. dividing plate；273. steam trap connection outlets；28. membrane walls VI；29. water level observation
Hole；201. water inlet tubing strings；111. water outlet tubing strings；
Detailed description of the invention
Fig. 3 is the front view of film-type wall-type vacuum hot water boiler, as it can be seen, the Vacuum Heat related in the present invention
Homogeneous solution-type reactor is mainly made up of upper and bottom section, and top is divided into heat-exchanger rig, bottom to be divided into heater, adds
Thermal is made up of upper water box 3, burner hearth and lower header 1.
As it can be seen, the heat-exchanger rig of the upper part in vacuum hot water boiler mainly includes front water chamber 2, U-shaped shell
Body 5 and rear hydroecium 11, and it is arranged on the water inlet tubing string 201 on front water chamber 2 and rear hydroecium 11 and outlet pipe
Post 111.
In the diagram it can be seen that be provided with exhaust tube 23 on U-shaped housing 5, it is used for evacuation in heat-exchanger rig,
Form negative pressure in making U-shaped housing 5, simultaneously for the consideration of safety factors, U-shaped housing has blasting piece device
6, the effect of pressure release is played when pressure exceeds standard.Blasting piece device 6 is mainly made up of three parts, respectively hole
Plate, rupture pressure disc and sharp object composition, its aperture plate sheet is a circular piece made by on-deformable material,
Having some passages in circular piece, rupture pressure disc is positioned at the top of orifice plate sheet, close with rupture pressure disc above rupture pressure disc
Place be equipped with a sharp object, when pressure overpressure malleation in U-shaped housing, rupture pressure disc can swell slightly,
Now sharp object can puncture rupture pressure disc at once, plays the effect of pressure release.
The bottom of the Tube Sheet of Heat Exchanger in U-shaped housing 5 connects hydroecium steam trap connection 24, is used for collecting condensed water.
The inside of U-shaped housing, the forward and backward tube sheet of heat exchanger 10 is placed on upper cover plate, and Tube Sheet of Heat Exchanger 9 is arranged on changes
On the forward and backward tube sheet of hot device, the arrangement of Tube Sheet of Heat Exchanger 9 is put formula and is selected according to the temperature difference of the water of boiler water inlet pipe and water outlet pipe,
Rocking, by cold water by front water chamber 2 of the Tube Sheet of Heat Exchanger 9 using fixed plate 7 fixing to cause due to water flow velocity
Introduce after Tube Sheet of Heat Exchanger 9, then export through hydroecium 11 later, water inlet tubing string 201 and water outlet tubing string 111
Place is equipped with pressure-temperature sensor.
All interior arrangements are loaded just by the size of U-shaped housing 5, unsuitable excessive.
As shown in Figure 3 and Figure 4, the lower part of vacuum hot water boiler i.e. heater is by upper water box 3, burner hearth
Forming with lower header 1, upper water box 3 centre position has a water level observation hole 29 for observing in water tank
Water level, has a lower header drain pipe 26 bottom lower header, be used for discharging the water in water tank.
As shown in Figure 6, burner hearth is a cuboid cavity, is positioned in the middle of upper water box 3 and lower header 1, burner hearth
Porch is provided with burner attachment means 12, is used for installing burner, and burner hearth inside circumference is by membrane wall ring
Around, membrane wall can be close arranging pipe membrane wall, it is also possible to be extended surface tube membrane wall.The present invention is with extended surface tube membrane type
Wall illustrates as embodiment.Such as Fig. 4, burner is installed for convenience, by two light pipes of burner hearth porch
Curve and allow pipe, form two and allow pipe 13., leak to reduce the thermal loss in burner hearth and flue gas meanwhile,
Flue gas shrouding 25 is had between pipe 13 and membrane wall, the cut-out in the middle of flue gas shrouding 25 and burner allowing
The size equivalent of spout.
Three backhaul membrane wall profiles as above are shown in Fig. 6, and three backhaul membrane walls in burner hearth are around vertically row
It is listed in the surrounding of burner hearth, the chi of the cuboid burner hearth that thorax portion size that is first backhaul pattern wall ring becomes in burner hearth
Very little, this interior thorax size is relevant with the rated capacity of length L and boiler according to the diameter D of burner flame,
Cella height and width range are [D+50mm, D+300mm], and the membrane type wall heating surface area of last interior thorax is every
Steam ton 3-8m2, preferably 4-6m2。
In three backhaul membrane walls, the first backhaul is by being positioned at the membrane wall I 14 of inlet face, is positioned at cuboid burner hearth both sides
The membrane wall II 16 in face and the membrane wall V 20 with inlet face opposite face surround；Second backhaul is by membrane wall II 16
Fold with membrane wall III 17 and form；
3rd backhaul both sides are folded by membrane wall III 17 and membrane wall IV 18 and membrane wall V 20 and membrane wall VI
28 fold and form, and wherein to be equipped with some light pipes unwelded in flakes for membrane wall VI 28 interposition, fills with exhanst gas outlet
Put 22 relative, for the discharge offer passage of flue gas in burner hearth.The width of two return is more than or equal to three backhauls
Width.
The computing formula of the sectional area that each return smoke air-flow is logical is:
S=B × (Vg+R) × [(t1+t2+t3)/3+273]/(3600 × Wg × 273) wherein Wg ∈ [6,12]
B is Fuel Consumption；Vg is actual exhaust gas volumn；R is the penalty coefficient of actual exhaust gas volumn；T is flue
Certain some temperature interior；Wg is velocity of flue gas.
First backhaul membrane wall II 16, with burner hearth porch as initiating terminal, has the unused band steel of some light pipes at its end
It is weldingly connected, forms a backhaul outlet flue and two return smoke inlet.For make flue gas in three backhaul membrane walls normal
Operation is washed away, and should ensure that it has certain impulsive force, has certain eroding velocity, ensures flue gas again
Will not produce accumulation, at a backhaul outlet flue and two return smoke inlet, part light pipe does not has Welding flat steel, is formed
Opening.Membrane wall III 17 is with the second backhaul smoke inlet as starting point, and end has the unused band steel of some light pipes to weld phase
Even, form a two return outlet flue, be also three backhaul smoke inlets simultaneously.
The width W=S/H of smoke inlet, wherein H is exhaust gases passes height.
More smooth and easy in order to make flue gas pass through, a backhaul membrane wall II 16 and three backhaul membrane walls IV 18 relative to
Last light pipe at two return outlet flue is welded by band steel 15 with the light pipe on membrane wall I 14, band steel
15 are slightly wider than other band steels, the limits that formation two is drawn at two return outlet flue or three backhaul smoke inlets, and two
Limit forms two angle α and β with membrane wall I 14, and as shown in figure 12, α and β is obtuse angle, can be equal,
Can also be unequal.Bottom the left and right sides of the burner hearth of the 3rd backhaul, it is equipped with a steam trap connection 27, is used for
Collect the condensed water produced on membrane wall due to heat exchange.
There is the arm stretching to be connected with outermost layer membrane wall in burner hearth the side of combustor steam trap connection 27, and this is thin
The opposite side of water device 27 is a U-shaped device, this U-shaped device side and deep being connected to burner hearth
Arm connects, and shape and body of heater adapt and fit installation, and a condensation-water drain is then drawn in opposite side position on the upper side.
As shown in Figure 10 and Figure 11, for coordinating rectangle body of heater, the side of combustor steam trap connection 27 has stretches
Enter to burner hearth the arm of the cuboid being connected with outermost layer membrane wall, to this end, such as Figure 11, this engaging arm side
Shape adapt with membrane wall shape, form some grooves 271, shown in Figure 10, this steam trap connection 27 with
Membrane wall linking side is also condensing water inlet 270, and the opposite side of this steam trap connection 27 is a cuboid dress
Put, suspention vertical clapboard 272 1 pieces in the middle of cuboid device, bottom this dividing plate 272 and cuboid, keep certain
Distance, forms a passage, and this cuboid device side is vertical with the engaging arm goed deep into burner hearth to be connected, just
Being stuck on lower header well, install with lower header laminating, the opposite side of cuboid device has condensation-water drain 273.
Before running boiler, in combustor steam trap connection 27, first add a small amount of water, in cuboid device,
Asking the water surface not have the distance between dividing plate 272 and bottom surface, this measure forms water seal in steam trap connection, prevents burner hearth
Interior flue gas is gone out, the condensation water collection that simultaneously will fall, it is achieved Auto-drainage.
In order to prevent the Gas phase Smoke of both direction from rushing, the light pipe on membrane wall V 20 centrage can and outside
A light effective band steel welding on membrane wall, separates both sides membrane wall at position of center line in exit, logical
The flue gas crossing three backhauls rushes at outlet 22 along membrane wall.Use above symmetrical film-type wall-type vacuum hot water boiler,
Flue gas obtains abundant heat exchange after three backhauls, and outlet temperature reaches 120 DEG C-130 DEG C, considerably reduces
Thermal loss, the mode of transversal flow makes boiler the most controlled, compares and is suitable for being placed in such as basement etc.
Short space.
Table 3
| The present invention | Documents 1 | Documents 2 | |
| Outlet temperature (DEG C) | 120-130 | 170 | --- |
In the 3rd backhaul of film-type wall-type vacuum hot water boiler, the temperature of flue gas the relatively first and second backhaul fall
Low, in order to better profit from the heat that in boiler, flue gas produces, improve the thermal efficiency of boiler, as it is shown in fig. 7,
Can fold and membrane wall V 20 and membrane wall VI 28 fold at membrane wall III 17 and membrane wall IV 18
Two faces of the 3rd backhaul are disposed with flow spoiler, are used for intercepting the flue gas of the 3rd backhaul so that it is long in this backhaul
Time stays.As shown in Figure 8 and Figure 9, the flow spoiler being positioned on membrane wall light pipe is pin shape, for preventing from disturbing
Device is the most intensive affects smoke movement for stream, arranges flow spoiler every a light pipe, with the light pipe being provided with flow spoiler
Light pipe on the membrane wall on relative opposite is not provided with flow spoiler, so, and the light pipe on two rows membrane wall in opposite directions
Be crisscross arranged flow spoiler.Flow spoiler intersects from top to bottom along place light pipe and is uniformly distributed, with place light pipe in
30 °～60 ° angular distribution, and length is intersected not produce with the flow spoiler on the light pipe of opposite membrane wall, and leaves
Permitted space to be preferred.The design of flow spoiler makes outlet temperature reduce by 5 DEG C-10 DEG C the most again, by instead
Retrial is tested, and when flow spoiler and place light pipe are 45° angle, temperature reduces ground at most, and the installation of flow spoiler makes membrane wall
In flue gas obtained abundant must utilizing, improve the thermal efficiency of boiler.
Table 4
| Flow spoiler and place light tube angulation | Outlet temperature (DEG C) |
| Unconfined flow device | 130 |
| 30° | 126 |
| 45° | 120 |
| 60° | 120 |
The design of all above membrane wall is all with the sectional elevation symmetrical placement of burner hearth centrage, this symmetric design
Making the flue gas in burner hearth spread to both sides, uniform force, heat transfer uniformly, reduces energy loss.
When film-type wall-type vacuum hot water boiler is started working, burner starts burning, produces flue gas in burner hearth
Laterally along the serpentine-like transversal flow of route of membrane wall design, the heat in flue gas passes through heat exchange to membrane wall light
Heat medium water in pipe heats, and heat medium water generates less than 100 DEG C of water vapour under negative pressure, now from upper water box
On water level observation hole 29 observe boiling water level just at the middle position in water level observation hole, owing to water evaporation is produced
Raw steam moves upward, and by upper cover plate, the spoiler on upper cover plate enters into U to steam flow-disturbing, steam
In shell body, carry out heat exchange with the cold water in Tube Sheet of Heat Exchanger, passed by the temperature being arranged on Inlet and outlet water tubing string
Sensor can show that rated temperature is poor.Steam forms water after heat exchange, flow back in lower header, goes successively to
Membrane wall is circulated.
The present invention is also extended to many backhauls symmetrical expression membrane wall vacuum hot water boiler, the serpentine-like transversal flow of flue gas
The vacuum hot water boiler of membrane wall all can fall within the scope and spirit of the invention.
Claims (11)
1. the heating means of a symmetrical film-type wall-type vacuum hot water boiler, it is characterised in that: the flue gas in burner hearth heats in Serpentis type transversal flow in membrane wall lateral symmetry.
Heating means the most according to claim 1, it is characterised in that: the flue gas in burner hearth is in the lateral symmetry ground serpentine-like transversal flow heating of three backhaul membrane walls.
Heating means the most according to claim 2, it is characterised in that: the eroding velocity Wg ∈ [6,12] of described flue gas.
null4. a symmetrical film-type wall-type vacuum hot water boiler，Including vacuum heat-exchanger rig and heater，Vacuum heat-exchanger rig includes front water chamber (2)，U-shaped housing (5) and rear hydroecium (11)，And it is arranged on the water inlet tubing string (201) on front water chamber (2) and rear hydroecium (11) and water outlet tubing string (111)，U-shaped housing has upper cover plate in (5)，Before heat exchanger、Back tube sheet (10) is placed on upper cover plate，Before Tube Sheet of Heat Exchanger (9) is arranged on described heat exchanger、On back tube sheet (10)，Described U-shaped housing (5) there is exhaust tube (23)，Demolition set (6) is installed on U-shaped housing (5)，The bottom of Tube Sheet of Heat Exchanger connects hydroecium steam trap connection (24)，It is characterized in that: described heater includes upper water box (3)，Lower header (1) and the burner hearth being clipped between lower header，Described burner hearth porch is provided with burner attachment means (12)，Burner hearth inside circumference uses symmetrical membrane wall as flue wall.
Vacuum hot water boiler the most according to claim 4, it is characterised in that: the membrane wall of described symmetry is that three symmetrical backhaul membrane walls are as flue wall.
Vacuum hot water boiler the most according to claim 5, it is characterized in that: described three backhaul membrane wall the first backhauls, by being positioned at the membrane wall I (14) of inlet face, are positioned at the membrane wall II (16) of cuboid burner hearth two sides and surround with the membrane wall V (20) of inlet face opposite face；Second backhaul is folded formed by membrane wall II (16) and membrane wall III (17)；3rd backhaul both sides are folded by membrane wall III (17) and membrane wall IV (18) and membrane wall V (20) and membrane wall VI (28) fold and form.
Vacuum hot water boiler the most according to claim 6, it is characterised in that: described first backhaul membrane type wall heating surface area is often to steam ton 3-8m2。
Vacuum hot water boiler the most according to claim 7, it is characterised in that: described first backhaul membrane type wall heating surface area is often to steam ton 4-6m2。
Vacuum hot water boiler the most according to claim 4, it is characterised in that: the described three each backhauls of backhaul membrane wall have smoke inlet, the width of described smoke inlet to be W=B × (Vg+R) × [(t1+t2+t3)/3+273]/(3600 × Wg × 273 × H), wherein B is Fuel Consumption；Vg is actual exhaust gas volumn；R is the penalty coefficient of actual exhaust gas volumn；T is flue certain some temperature interior；Wg is velocity of flue gas；H is exhaust gases passes height.
10. according to the vacuum hot water boiler described in claim 4-9, it is characterised in that: keep away and on face, be provided with flow spoiler for two in described 3rd backhaul.
11. according to the vacuum hot water boiler described in claim 4-9, it is characterised in that: bottom the left and right sides of the burner hearth of described 3rd backhaul, it is separately installed with steam trap connection (27).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2015101782195 | 2015-04-15 | ||
| CN201510178219 | 2015-04-15 | ||
| CN2015107533514 | 2015-11-09 | ||
| CN201510753351 | 2015-11-09 |
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| CN106052113A true CN106052113A (en) | 2016-10-26 |
| CN106052113B CN106052113B (en) | 2020-01-14 |
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Cited By (1)
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| CN107191916A (en) * | 2017-07-14 | 2017-09-22 | 江苏太湖锅炉股份有限公司 | A kind of four membrane wall symmetrical structures of Small And Medium Capacity combustion gas water pipe steam boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191916A (en) * | 2017-07-14 | 2017-09-22 | 江苏太湖锅炉股份有限公司 | A kind of four membrane wall symmetrical structures of Small And Medium Capacity combustion gas water pipe steam boiler |
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| CN106052113B (en) | 2020-01-14 |
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