CN206338933U - External scaling fire-tube type normal-pressure hot-water boiler - Google Patents
External scaling fire-tube type normal-pressure hot-water boiler Download PDFInfo
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- CN206338933U CN206338933U CN201621161804.0U CN201621161804U CN206338933U CN 206338933 U CN206338933 U CN 206338933U CN 201621161804 U CN201621161804 U CN 201621161804U CN 206338933 U CN206338933 U CN 206338933U
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Abstract
The utility model provides a kind of external scaling fire-tube type normal-pressure hot-water boiler, is made up of external chuck fire tube and boiler body two parts.Fire tube use scaling type fire tube, and with sleeve pipe constitute chuck structure.Cold water in chuck carries out reinforcing cooling to fire tube, reduces the ignition temperature in fire tube, and by the contraction of scaling type fire tube wall, the secondary mixing of expansion structure overheavy firing gas, make burning more abundant.By controlling ignition temperature and being sufficiently mixed, nitrogen oxides in effluent NOxContent be greatly reduced, reach the purpose of environment protection emission.Cold water is preheated by chuck, filler is exchanged and water tank in the three-level heating of flue gas communicating pipe, heat transfer rate is 1.5~2 times of same category of device, and the thermal efficiency reaches 92%~97%, and reduces under identical burner conditions 20 decibels or so of noise.
Description
Technical field
The utility model is related to normal-pressure boiler equipment, more particularly to a kind of external scaling fire-tube type normal-pressure hot-water boiler.
Background technology
Gas-fired water heating boiler of the prior art is generally shell-and-tube boiler.Heat passes through multi-way in traditional shell-and-tube boiler
Heat-exchanging tube bundle carries out heat transfer to water, improves water temperature and exports hot water.This hot-water boiler has that floor space is big, heat exchange efficiency
The shortcomings of low, easy fouling, especially cause thermal resistance increased dramatically after tube wall incrustation, cause heat exchange efficiency to decline.In addition, shell-and-tube
Hot-water boiler produces a large amount of steam in diabatic process, it is impossible to enters the facilities such as bathing, heating, causes energy waste.
Except shell-and-tube boiler, direct contact-type boiler is have also appeared, this kind of boiler is directly entered using burning gases with water
Row transmission of heat by contact.This heat transfer structure heat transfer is rapid, and water temperature can be raised quickly, but still suffer from many drawbacks.Firstly, since combustion
Burn cylinder and be located at device interior, topology layout limits combustion barrel length and diameter, and flame can not be in enough strokes and space
Complete fully burning；Secondly, light pipe or waveform fire tube are used combustion barrel, flame local temperature in combustion barrel is too high, causes more
Produce substantial amounts of nitrogen oxides NOx, it is impossible to meet environmental requirement.
Utility model content
In order to solve problem present in above-mentioned background technology, the utility model provides a kind of external scaling fire-tube type normal pressure
Hot-water boiler, the technologies such as external fire tube, fire tube cooling and new scaling type fire tube are used in the utility model, are made burned
The secondary mixing of combustible substance, combustion intensity reduction in journey, and by controlling burning situation temperature, reduce NOxGeneration, reach height
The thermal efficiency, low-nitrogen discharged purpose.
To achieve the above object, it is of the present utility model that a kind of external scaling fire-tube type normal-pressure hot-water boiler, including pot are provided
Furnace main body part and the external fire tube part being connected with boiler body surface, the external fire tube part are jacket type container
Structure, including burner, scaling type fire tube, jacket outside cylinder and water inlet pipe, wherein, scaling type fire tube is enclosed within by the jacket outside cylinder
Inside, and both interval settings, centre forms jacket space；The scaling type fire tube includes expansion segment and contraction section, expansion segment
It is arranged alternately with contraction section.
Further, the boiler body part includes the pipe at the top of boiler barrel and boiler barrel, the boiler
Inner barrel is followed successively by water tank area, flue gas distribution region, heat exchange area and spray region from bottom to top, wherein,
The water tank area includes being located at the outlet pipe of water tank area bottom, and the flue gas from external fire tube part connects
Siphunculus；
The flue gas distribution region includes the flue gas distribution drum that bottom is connected with flue gas communicating pipe, and installed in flue gas point
Tarpaulin with cylinder upper end；
The heat exchange area includes filler screen, and the filler being arranged on filler grid；
The spray region includes being arranged on the shower row of spray area top, and the top being connected is arranged with shower and is connected
Pipe, and it is arranged on the wire mesh demister at boiler barrel inner top opening.
Further, the boiler barrel is metallic cylinder structure；Blowoff valve, hand are also included in the boiler body part
Hole, detection hole and temperature, water level and flow of inlet water monitoring device.
Further, blowoff valve, hand hole, detection hole and temperature, water level are also included in the boiler body part and is entered
Water flow monitor.
Further, in the boiler body part also include automaton and safety device, realize monitoring water level,
Low-water alarm and shutdown；The burner can carry out combustion intensity regulation or shutdown according to inflow.
Further, the outside of the boiler body part and/or external fire tube part uses insulation material, to reduce heat
Amount loss.
The concrete structure and functions of external scaling fire-tube type normal-pressure hot-water boiler of the present utility model are made below
Specifically describe.
The utility model provides a kind of external scaling fire-tube type normal-pressure hot-water boiler, and the normal-pressure hot-water boiler uses gas
The operating modes such as fuel is heating, bathing provide hot water.External scaling fire-tube type normal-pressure hot-water boiler of the present utility model includes boiler
Main part (I) and the external fire tube part (II) being connected with boiler body surface.
(I), the boiler body part includes the pipe at the top of boiler barrel and boiler barrel.Inside boiler barrel certainly
Water tank area, flue gas distribution region, heat exchange area and spray region are followed successively by down.Wherein：
1st, water tank area includes：
Outlet pipe, is located at water tank area bottom, for hot water output；
Flue gas communicating pipe, from external fire tube part, from water tank lower, transverse enters water tank, extend then up, end
End be connected with flue gas distribution drum, be completely submerged in water, for combustion product gases circulation and exchanged heat with the water outside tube wall.
2nd, flue gas distribution region includes：
Flue gas distribution drum, is vertically arranged in flue gas distribution region, and bottom is connected with flue gas communicating pipe, and water tank is stretched out on top
Highest liquid level face, concentrates flue gas and heat exchange zone conveying；
Tarpaulin, installed in flue gas distribution drum upper end, prevents that shower water from entering flue gas distribution drum and flue gas communicating pipe.
3rd, heat exchange area includes：
Filler screen, installed in heat exchange area bottom, for carrying filler thereon；
Filler, is arranged on filler grid, for heat transfer；
In one embodiment, the boiler barrel inwall surrounding on heat exchange area top is additionally provided with baffle ring, and it is
Cyclic structure, for spacing to being carried out at the top of filler.
4th, spray region includes：
Shower is arranged, and installed in spray area top, is made up of multigroup tubulation containing nozzle, one end and top connecting tube phase
Even, for making to spray filler into water；
Connecting tube is pushed up, one end is connected with shower row, and the other end is connected through boiler barrel with external fire tube part, is used for
Water inlet from external fire tube part is introduced into shower row；
Wire mesh demister, is arranged at boiler barrel inner top opening, for removing the remaining mist of flue gas entrainment.
Pipe at the top of boiler barrel is correspondingly arranged with open top, and the flue gas after filtering is discharged from pipe.
In one embodiment, wire mesh demister can also be arranged on inside pipe.
In one embodiment, boiler barrel is metallic cylinder structure.
In one embodiment, flue gas distribution drum is in side of the smoke outlet using increase volume and the perforate gross area
Method, increases aperture, and reduce flue gas goes out speed.And perforate uses downward-sloping structure, had both been avoided that to filler blow-through, and also might be used
Prevent that shower water from entering flue gas distribution drum.
In one embodiment, there are multiple downward-sloping perforates, the center of perforate on the barrel of flue gas distribution drum
The angle of axle and flue gas distribution drum side wall is 50 ° to 70 °；In a preferred embodiment, the central shaft of perforate and flue gas point
Angle with cylinder side wall is 55 ° to 65 °；In a preferred embodiment, the central shaft of perforate and flue gas distribution drum side wall
Angle is 60 °.
The filler can use stainless steel structured packing or stainless steel cascade ring random packing；In an embodiment
In, described filler uses stainless steel structured packing, preferably stainless steel plate ripple packing, and it has gas liquid interfacial area
Greatly, resistance is small, water distribution gas distribution performance is good, the easily effect such as high, cutting bubble of long film, intensity.It is of course also possible to using in this area
The known other fillers exchanged heat for hot-water boiler.
In one embodiment, in the boiler body part also comprising blowoff valve, hand hole, detection hole and temperature,
The conventional boiler annex such as water level and flow of inlet water monitoring device.
(II), the external fire tube part is jacket type structure of container, including burner, scaling type fire tube, jacket outside cylinder
And water inlet pipe, wherein：
Jacket outside cylinder, it covers scaling type fire tube internally, and both interval settings, and centre forms jacket space, is used for
Accommodate water inlet；Jacket outside cylinder top is connected with top connecting tube, bottom connection water inlet pipe, so that water inlet enters chuck from water inlet pipe
Space, and arranged through pushing up connecting tube into shower；
Scaling type fire tube, top is connected with burner, bottom connection flue gas communicating pipe, for combustion flame and the stream of flue gas
Lead to and exchanged heat with the water outside tube wall；The scaling type fire tube includes expansion segment and contraction section, expansion segment and contraction section alternating
Set.
Burner, it can be frequency conversion burner, and using gaseous fuel, heat energy is provided for water inlet；
Water inlet pipe, is connected with jacket outside cylinder, for providing water inlet (cold water).
In one embodiment, the external diameter of expansion segment is definite value Φ, the vertical height of each contraction section for 2 Φ/3 to
Φ/3, preferably Φ/2；The depth capacity that contraction section is shunk to fire tube inner radial relative to expansion segment is Φ/10 to Φ/6,
Preferably Φ/8；Apart from the contraction section bottom at the depth capacity that contraction section shrinks relative to expansion segment to fire tube inner radial
Vertical range is Φ/12 to Φ/8, preferably Φ/10.
In one embodiment, the external diameter of expansion segment is definite value Φ, and the vertical height of each contraction section is Φ/2, is shunk
The depth capacity that section is shunk to fire tube inner radial relative to expansion segment is Φ/8, and contraction section is relative to expansion segment to inside fire tube
Vertical range at the depth capacity of radial contraction apart from the contraction section bottom is Φ/10.
In technical solutions of the utility model, the scaling type fire tube includes expansion segment and contraction section, expansion segment and contraction
Section is arranged alternately.The setting of the utility model scaling type fire tube has directionality, uses the anxious principle for expanding slow contracting.Due to combustion
Burner flame quickly can be spread after spraying while advancing around, and the shape that fire tube wall suddenly expands slow contracting can simultaneously be produced to flame
It is raw downwards and horizontal vertical direction disturbance, in the middle part of the constantly oblique impact of gas at edge, the gas in fire tube is carried out two
It is secondary to mix and make burning more abundant.Simultaneously as fire tube outer wall causes wall temperature rapid drawdown with Cold Water Exposure, wall side flame is in disturbance
During can flame of centre temperature conduction to cold water, fire tube internal temperature entire lowering is caused, so will not be because of vigorous combustion
And produce a large amount of nitrogen oxides NOx, so as to reduce NO in flue gasxContent.Because scaling type fire tube suddenly expands the flowing side of slow contracting
Formula, make fire tube internal drag will not it is excessive and influence burning adequacy.The directionality that scaling type structure has is disturbing air-flow
Seamlessly transitted while dynamic, noise can be effectively reduced.
In addition, asymmetry of the pantograph structure of fire tube due to expansion and contraction, can cause medium (flame, cigarette gas and water)
Locally producing strong disturbance.On the outside of fire tube, during cold water flows from bottom to top, without setting deflection plate in chuck
Or ribbon carries out reinforcing flow-disturbing, the pantograph structure of tube wall itself can make cold water Uniform Flow in chuck.In addition, the scaling of tube wall
Structure can increase cold water and tube wall is washed away, less scaling.According to experimental data, the heat-exchange capacity of pantograph structure is carried than light pipe
It is high by 20%~50%.
While being cooled down to fire tube, also water inlet is preheated.Cold water is preheated by jacket type structure of container, water
Flue gas communicating pipe and filler heat exchange carry out three-level heating in case, and heat transfer rate is 1.5~2 times of other boilers.
In such scheme, described fire tube is not in the main body of boiler, but is used as independent unit and boiler body
Part is connected.Shape, diameter, length of fire tube etc. are no longer limited by main part, and can be carried out according to Actual combustion operating mode
It is separately provided.
In such scheme, the scaling type fire tube constitutes jacket type structure of container with jacket outside cylinder, and is dropped by this structure
Temperature in low fire tube.The scaling type fire tube is in chuck water-cooled environment all the time.
Gaseous fuel used in external scaling fire-tube type normal-pressure hot-water boiler of the present utility model includes natural gas, natural pond
Air-liquid liquefied oil gas, coal gas, hydrogen etc., from the point of view of environmental protection and safety, preferably natural gas and biogas, more preferably naturally
Gas.
In one embodiment, steam generator system of the present utility model includes automaton and safety device, realizes
Monitoring water level, low-water alarm and shutdown.Burner can carry out burning by force according to inflow in steam generator system of the present utility model
Degree regulation is shut down.
In one embodiment, outside use of the boiler body part of the hot-water boiler and/or external fire tube is protected
Adiabator, to reduce thermal loss.Insulation material alternative such as rock wool, aluminosilicate fiber cotton, chloric acid rate cellucotton, glass fiber
Cotton etc., it would however also be possible to employ insulation mineral wool board and insulation clay, specific material and construction can be implemented according to prior art.
The external scaling fire-tube type normal-pressure hot-water boiler of the utility model compared with the prior art, has the effect that：
1. heat exchange efficiency can reach 92%~97%；
2. under equal burning condition, NOxDischarge capacity is than same type boiler reduction by more than 30%；
3. water temperature is quickly improved, temperature rise speed is 1.5~2 times of other boilers；
4. under identical burner conditions, more than 20 decibels of lower noise.
Brief description of the drawings
Fig. 1 is the external overall structure profile for scaling fire-tube type normal-pressure hot-water boiler of the present utility model.
Fig. 2 is the partial enlarged drawing of the scaling fire tube of external scaling fire-tube type normal-pressure hot-water boiler of the present utility model, is shown
The proportionate relationship of each size of contraction section and expansion segment of fire tube tube wall is shown.
Fig. 3 is the partial enlarged drawing of the flue gas distribution drum of external scaling fire-tube type normal-pressure hot-water boiler of the present utility model,
Show the direction of perforate and flue gas outflow on the barrel of flue gas distribution drum.
Reference in figure：
Outlet pipe (1)；Boiler barrel (2)；Flue gas communicating pipe (3)；Flue gas distribution drum (4)；Tarpaulin (5)；Filler screen
(6)；Filler (7)；Baffle ring (8)；Shower arranges (9)；Wire mesh demister (10)；Pipe (11)；Burner (12)；Scaling type fire
Manage (13)；Jacket outside cylinder (14)；Water inlet pipe (15).
Embodiment
The flow of equipment operation is divided into burning journey and water journey, to make the utility model purpose, technical scheme and feature more
It is clear, it is described respectively according to different flows below in conjunction with the accompanying drawings.Herein below is used to illustrate the utility model, but is not used to
Limit scope of the present utility model.
Referring to Fig. 1, the burning journey of equipment operation is：Combustion gas and air by formed after the mixed combustion of burner 12 flame and
Flue gas enters scaling type fire tube 13 and run downwards, and subsequent flue gas enters the water tank of the bottom of boiler barrel 2 by flue gas communicating pipe 3
In and be upwardly into flue gas distribution drum 4 through water tank, the top of flue gas distribution drum 4 is with tarpaulin 5 to prevent that shower water from entering cigarette
Gas distribution drum 4, flue gas distribution drum 4 gently exports flue gas, makes flue gas by filler screen 6 and evenly into filler 7,
Filler 7 is positioned on filler screen 6, its top by baffle ring 8 come spacing, flue gas in filler 7 with arranged from shower 9 spray
Water drenching carries out transmission of heat by contact, and the mist of deentrainment is then removed by wire mesh demister 10, is arranged finally by pipe 11 and chimney
Enter in air.
Water journey is：Cold water is entered by the water inlet pipe 15 of external fire tube bottom, along scaling type fire tube 13 and jacket outside cylinder 14
Between jacket space rise, take away the partial heat of flue gas by the tube wall of scaling type fire tube 13, reduce the temperature of fire tube 13,
Jacket space top enters shower row 9 through pushing up connecting tube, and the nozzle for arranging 9 through shower is sprayed to filler 7, in filler
7 surface and internal and flue gas carry out contact heat-exchanging, eventually fall into the water tank of the bottom of boiler barrel 2 and by water tank bottom
Outlet pipe 1 is supplied to user.
In a specific embodiment, as shown in Figure 3, increase flue gas goes out described flue gas distribution drum partial enlarged drawing
Mouth end volume and the perforate gross area, increase aperture, and reduce flue gas goes out speed.And perforate uses downward-sloping structure, can
Avoid to filler blow-through, enter flue gas distribution drum prevented also from shower water.As shown in figure 3, having on the barrel of flue gas distribution drum
Multiple downward-sloping perforates, the central shaft of perforate and the angle of flue gas distribution drum side wall are 60 °.
In a specific embodiment, the proportionate relationship of each size of contraction section and expansion segment of scaling type fire tube tube wall is such as
Shown in Fig. 2, the external diameter of expansion segment is definite value Φ, and the vertical height of each contraction section is Φ/2, contraction section relative to expansion segment to
The depth capacity that fire tube inner radial is shunk is Φ/8, and contraction section is deep relative to the maximum that expansion segment shrinks to fire tube inner radial
Vertical range at degree apart from the contraction section bottom is Φ/10.
In a specific embodiment, steam generator system of the present utility model includes perfect automaton and safety
Device, realizes monitoring water level, low-water alarm and shutdown.Burner can enter according to inflow in steam generator system of the present utility model
Row combustion intensity is adjusted or shut down.
In a specific embodiment, steam generator system of the present utility model includes blowoff valve, hand hole, flame-observing hole etc., just
In operation and maintenance.
In a specific embodiment, the boiler body part of the hot-water boiler and/or the outside of external fire tube are adopted
With insulation material, to reduce thermal loss.
The above, the external scaling fire-tube type normal-pressure hot-water boiler of the utility model has the characteristics that：High efficiency, heat
Efficiency reaches 92%~97%；High-environmental, nitrogen oxides NOxDischarge capacity is than same type boiler reduction by more than 30%；Height reaction
Speed, temperature rise speed is 1.5~2 times of other boilers；More than 20 decibels of lower noise under low noise, identical burner conditions.
Although above having made detailed description to the utility model with generality explanation and specific embodiment,
On the basis of the utility model, it can be made some modifications or improvements, this is apparent to those skilled in the art
's.Therefore, the these modifications or improvements on the basis of without departing from the utility model spirit, belonging to the utility model will
Seek the scope of protection.
Claims (10)
1. a kind of external scaling fire-tube type normal-pressure hot-water boiler, the boiler include boiler body part and with boiler body portion
Divide the external fire tube part of side connection, it is characterised in that
The external fire tube part is jacket type structure of container, including burner, scaling type fire tube, jacket outside cylinder and water inlet pipe,
Wherein, the jacket outside cylinder covers scaling type fire tube internally, and both interval settings, and centre forms jacket space；The contracting
Putting type fire tube includes expansion segment and contraction section, and expansion segment and contraction section are arranged alternately.
2. external scaling fire-tube type normal-pressure hot-water boiler as claimed in claim 1, it is characterised in that the scaling type fire tube
The external diameter of expansion segment is definite value Φ, and the vertical height of each contraction section is 2 Φ/3 to Φ/3；Contraction section is relative to expansion segment to fire
The depth capacity that pipe inner radial is shunk is Φ/10 to Φ/6；Contraction section shrinks relative to expansion segment to fire tube inner radial
Vertical range at depth capacity apart from the contraction section bottom is Φ/12 to Φ/8.
3. external scaling fire-tube type normal-pressure hot-water boiler as claimed in claim 1, it is characterised in that the scaling type fire tube
The external diameter of expansion segment is definite value Φ, and the vertical height of each contraction section is Φ/2；Contraction section is relative to expansion segment to inside fire tube
The depth capacity of radial contraction is Φ/8；Distance at the depth capacity that contraction section is shunk to fire tube inner radial relative to expansion segment
The vertical range of the contraction section bottom is Φ/10.
4. the external scaling fire-tube type normal-pressure hot-water boiler as any one of claim 1-3, it is characterised in that the pot
Furnace main body part includes being followed successively by water from bottom to top inside the pipe at the top of boiler barrel and boiler barrel, the boiler barrel
Case region, flue gas distribution region, heat exchange area and spray region, wherein,
The water tank area includes being located at the outlet pipe of water tank area bottom, and the connection of the flue gas from external fire tube part
Pipe；
The flue gas distribution region includes the flue gas distribution drum that bottom is connected with flue gas communicating pipe, and installed in flue gas distribution drum
The tarpaulin of upper end；
The heat exchange area includes filler screen, and the filler being arranged on filler grid；
The spray region includes being arranged on the shower row of spray area top, and the top connecting tube being connected is arranged with shower, with
And it is arranged on the wire mesh demister at boiler barrel inner top opening.
5. external scaling fire-tube type normal-pressure hot-water boiler as claimed in claim 4, it is characterised in that the flue gas distribution drum
There are multiple downward-sloping perforates, the central shaft of perforate and the angle of flue gas distribution drum side wall are 50 ° to 70 ° on barrel.
6. external scaling fire-tube type normal-pressure hot-water boiler as claimed in claim 4, it is characterised in that on heat exchange area top
Boiler barrel inwall surrounding be additionally provided with baffle ring.
7. external scaling fire-tube type normal-pressure hot-water boiler as claimed in claim 4, it is characterised in that the boiler barrel is gold
Belong to cylindrical structure；Also comprising blowoff valve, hand hole, detection hole and temperature, water level and flow of inlet water in the boiler body part
Monitoring device.
8. the external scaling fire-tube type normal-pressure hot-water boiler as any one of claim 5-7, it is characterised in that described to fill out
Material uses stainless steel structured packing or stainless steel cascade ring random packing.
9. the external scaling fire-tube type normal-pressure hot-water boiler as any one of claim 5-7, it is characterised in that the pot
Automaton and safety device are also included in furnace main body part, monitoring water level, low-water alarm and shutdown is realized；The combustion
Burner can carry out combustion intensity regulation or shutdown according to inflow.
10. the external scaling fire-tube type normal-pressure hot-water boiler as any one of claim 5-7, it is characterised in that described
The outside of boiler body part and/or external fire tube part uses insulation material, to reduce thermal loss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621161804.0U CN206338933U (en) | 2016-10-24 | 2016-10-24 | External scaling fire-tube type normal-pressure hot-water boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621161804.0U CN206338933U (en) | 2016-10-24 | 2016-10-24 | External scaling fire-tube type normal-pressure hot-water boiler |
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| Publication Number | Publication Date |
|---|---|
| CN206338933U true CN206338933U (en) | 2017-07-18 |
Family
ID=59300388
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621161804.0U Active CN206338933U (en) | 2016-10-24 | 2016-10-24 | External scaling fire-tube type normal-pressure hot-water boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338143A (en) * | 2016-10-24 | 2017-01-18 | 徐士伦 | Normal-pressure hot water boiler with retractable fire tube externally arranged |
-
2016
- 2016-10-24 CN CN201621161804.0U patent/CN206338933U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338143A (en) * | 2016-10-24 | 2017-01-18 | 徐士伦 | Normal-pressure hot water boiler with retractable fire tube externally arranged |
| CN106338143B (en) * | 2016-10-24 | 2023-06-20 | 大庆市豪迈德科技有限公司 | External contraction and expansion fire tube type normal pressure hot water boiler |
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