CN109695863A - A kind of steam generator design method of electric heater capacity optimization - Google Patents
A kind of steam generator design method of electric heater capacity optimization Download PDFInfo
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- CN109695863A CN109695863A CN201811234245.5A CN201811234245A CN109695863A CN 109695863 A CN109695863 A CN 109695863A CN 201811234245 A CN201811234245 A CN 201811234245A CN 109695863 A CN109695863 A CN 109695863A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
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Abstract
The present invention provides a kind of design methods of steam generator, the steam generator includes cabinet and interior tube body, said inner tube body is arranged in cabinet, said inner tube body includes outer tube and the core that is arranged in outer tube, the core is square through-hole and octagon through-hole composition, the side length of the square through-hole is equal to the side length of octagon through-hole, four of the square through-hole while be respectively four different octagon through-holes while, four of octagon through-hole apart from one another by while be respectively four different square through-holes while；Electric heater is set in square through-hole；The electric heater is divided into multilayer and is arranged around the center of core, and the ratio of every layer of electrical heating power is designed according to the side length L of core height H and regular quadrangle.The present invention provides a kind of design methods of electric heater capacity, further improve homogeneous heating degree and heating efficiency.
Description
Technical field
The present invention relates to boiler technology field more particularly to a kind of steam generators of Novel structure.
Background technique
Steam generator is the mechanical equipment for water being heated as using the thermal energy of fuel or other energy steam.Steam hair
Raw device application field is extensive, is widely used in clothing factory, drycleaner's, restaurant, steamed bun shop, dining room, dining room, factories and miness, Bean Products Factory etc.
Place.
Current steam generator mostly uses combustion gas or fuel Heating, and heating efficiency is low, and currently used electricity
Hot steam generator is directly heated and is generated to the water in water tank to the bottom of storage tank using electrothermal tube setting mostly
Steam.There is heating slowly, the low problem of the thermal efficiency in this electric heating steam generator.
As Chinese patent literature CN2071061U disclose it is a kind of for beauty, health care the effects of steam generating appliances, packet
It includes metal electrode board and the shell made of heat resistant plastice, go out vapour cover board, interior panelling, flexible handle, metal electrode board is necessary
Power on through power supply line, there are internal baffles in shell, it is suitable for reading to have vapour cover board out, there is socket slot that can insert with band outside shell bottom
The flexible handle of mouth is connected.For another example a kind of improved electric-heating steam generation disclosed in Chinese patent literature CN2651594Y
Device, for generating steam, including body cavity and electric heater, electric heater are placed in body cavity, are equipped in body cavity
Partition separates cavity above and below, and upper cavity is vapor cavity, and lower chamber is heating water cavity, and partition is equipped with steaming hole；Partition
There are 2-6 layers, form transition chamber between partition, the steaming hole on adjacent partition, which misplaces, to be arranged.Electric heater will heat in water cavity
Water heating, steam is entered spare in vapor cavity by the transition chamber of partition and its formation.Disclosed in above-mentioned two patent document
Electric heating steam generator, belong to such product.
The steam generator heating of the prior art is uneven, and whole to generate the inefficient of steam, heater structure compares
It is single.
Summary of the invention
The present invention aiming at the shortcomings in the prior art, provides a kind of Novel structure Multifunctional steam generator, can be quick
There is provided steam, and the steam generator has the function of heating rapid, uniformity of temperature profile, safe and reliable, improves heating
Efficiency.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of design method of steam generator, the steam generator include cabinet and interior tube body, and the setting of said inner tube body exists
In cabinet, said inner tube body includes outer tube and the core that is arranged in outer tube, and said inner tube body is that vertical direction is arranged, the core
Extend on interior tube body vertical direction where body；The core is square through-hole and octagon through-hole composition, the square
The side length of through-hole is equal to the side length of octagon through-hole, and four of the square through-hole are when being respectively four different positive eight
The side of shape through-hole, four of octagon through-hole apart from one another by while be respectively four different square through-holes while；It is square
Electric heater is set in shape through-hole；The electric heater is divided into multilayer and is arranged around the center of core, every layer of electric heating
The ratio of power is designed according to the side length L of core height H and regular quadrangle.Preferably, the cross section of said inner tube body
It is square.
Preferably, groove is arranged in wall in said inner tube body, the outer end of the core is arranged in groove.
Preferably, interior tube body is welded for multi-segment structure, core is arranged in the junction of multi-segment structure.
Preferably, the outer tube of the steam (vapor) outlet and interior tube body is to be tightly connected.
Preferably, the cross-sectional area of steam (vapor) outlet pipeline is less than the cross-sectional area of the outer tube of interior tube body.
Preferably, the middle position of cabinet is arranged in said inner tube body.
Preferably, intake tunnel is strip slot.
Preferably, 50% or less cabinet water level is arranged in the intake tunnel.
Preferably, the electric heater is resistance heater.
Preferably, resistance heater fills entire square passageway.
Preferably, the core is placed in the vertical direction to be multiple, it is arranged on the outer tube between two neighboring core
Intake tunnel.
Preferably, the center of square through-hole centre distance core is remoter, then on vertical direction unit length resistance
The heating power of heater is bigger.
Preferably, the center of square through-hole centre distance core is remoter, then on vertical direction unit length resistance
The amplitude that the heating power of heater is increasing constantly increases.
Preferably, the core-center is octagon channel, the regular quadrangle channel is around two layers of core
Structure, outermost layer are octagon channel, the side length for the square passageway that the side length of the outer tube is 8 times.
Preferably, the heating power of each electric heater of the first layer is W1, each electric heater of the second layer
Heating power be W2, the core height is H, and the side length of regular quadrangle is L, then meet following requirement:
W2/W1=a-b*LN(H/L)；Wherein a, b are parameter, 3.3 < a < 3.4,0.90 <b < 0.95；
1.15<W2/W1<1.75；5.9< H/L<10.1；
Total heating power of first layer and the second layer is M, 2500W < M < 5500W.
Preferably, a=3.343, b=0.921.
The present invention has the advantage that
1) present invention further improves homogeneous heating degree and heating efficiency by providing a kind of new design method.
2) present invention devises a kind of steam generator of new-type heating structure, by such structure, can be realized quickly
There is provided steam, and the steam generator has the function of heating rapid, uniformity of temperature profile, safe and reliable, improves heating
Efficiency.
3) present invention is further mentioned by the variation of heating power of the electric heater apart from core-center in setting interior tube body
High homogeneous heating degree and heating efficiency.
4) vertical direction that the present invention devises interior tube body inner core-body is spaced apart, and is arranged on the interior tube body at interval
Intake tunnel, it is ensured that the water at different location timely enters inner tube and heated, and can further improve heating efficiency.
5) present invention devises variation of the electric heater heating power different in interior tube body along short transverse, Neng Goujin
The security performance and heating properties of one step raising device.
6) present invention passes through numerical simulation and many experiments, it is determined that the optimal ratio of the electrical heating power of different layers is closed
System, further improves homogeneous heating degree and heating efficiency, and also the design for the interior tube body of such structure provides one most preferably
Reference frame.
7) present invention passes through numerical simulation and many experiments, it is determined that the iptimum relationship of each size of core, further
Improve homogeneous heating degree and heating efficiency.
Detailed description of the invention:
Fig. 1 is the steam generator preferred structure schematic diagram that the present invention generates hot water and steam.
Fig. 2 is the steam generator preferred structure schematic diagram for only generating steam of the invention.
Fig. 3 is interior tube body (core) Structure of cross section schematic diagram.
Fig. 4 is Fig. 3 interior tube body inner core-body Section A-A schematic diagram.
Fig. 5 is interior tube body longitudinal direction section schematic diagram.
In figure: 1- cabinet；2- interior tube body；3- cold water inlet；4- hot water outlet；5- steam (vapor) outlet；6- exhaust outlet；
7- core；71- regular quadrangle；72- octagon；The side 73-；8- aperture；9- electric heater.
Specific embodiment
Fig. 1-5 illustrates a kind of steam generator.As shown in Figure 1, the steam generator include cabinet 1, interior tube body 2,
The lower part of cabinet 1, the hot water outlet 4 is arranged in cold water inlet 3, hot water outlet 4 and steam (vapor) outlet 5, the cold water inlet 3
In the top of 1 body of case.Said inner tube body 2 is arranged in cabinet, and said inner tube body 2 is that vertical direction is arranged (perpendicular to water tank bottom
Facial planes setting), interior tube body 2 includes outer tube and the core 7 being arranged in outer tube, and intake tunnel is arranged in 2 lower part of said inner tube body
8, guarantee that the water of cabinet 1 is able to enter interior tube body 2 and is heated, the top of interior tube body 2 connects steam (vapor) outlet 5；The core 7 is set
It sets on 8 top of intake tunnel, the core 7 extends on 2 vertical direction of interior tube body；The core 7 is square 71 He of through-hole
Octagon through-hole 72 forms, and the side length of the square through-hole is equal to the side length of octagon through-hole, the square through-hole
Four of 71 while 73 be respectively four different octagon through-holes 72 while, four of octagon through-hole 72 apart from one another by
While 73 be respectively four different square through-holes 71 while；Electric heater 9 is set in square through-hole 71.
The present invention passes through the steam generator that new-type heating structure is arranged, which is evenly distributed on electric heater
Around multiple octagon channel, fluid is entered in octagon channel and is uniformly heated by electric heater,
By such structure, it can be can be realized by a device and steam is quickly provided, and the steam generator has heating fast
Speed, uniformity of temperature profile, safe and reliable function, improve heating efficiency.
Preferably, the outer tube of 5 pipeline of steam (vapor) outlet and interior tube body 2 is to be tightly connected.
Preferably, the cross-sectional area of 5 pipeline of steam (vapor) outlet is less than the cross-sectional area of the outer tube of interior tube body 2.In this way can
Guarantee the steam velocity of discharge.
Cold water enters cabinet by cold water inlet 3.When being worked, the water in cabinet 1, in cabinet 1 is arranged in interior tube body 2
Enter interior tube body 2 by the intake tunnel 8 on outer tube, then water passes through the core 7 in interior tube body 2 in octagon through-hole
Electric heater in regular quadrangle through-hole is heated, and the steam generated after heating is discharged by steam (vapor) outlet 5.Meanwhile inner tube
Body is while generating steam, while the intracorporal water of heater box, and the hot water generated after heating can carry out benefit by hot water outlet
With.
Preferably, regular quadrangle through-hole is closed up and down, water be cannot be introduced into.
By above-mentioned structure setting, steam and hot water can be generated simultaneously, so that function there are many steam generating appliances,
Its range utilized is expanded, and the steam generated is directly discharged by the steam (vapor) outlet connecting with interior tube body, because being logical
Outer tube is crossed to heat the water outside interior tube body, thus external water will not explosive evaporation, also ensure the safety of heating.
The present invention is vertical direction setting by interior tube body 2, can to heat water in the vertical direction, so that water is upper
Continuous heating during rising, the interior tube body being arranged relative to horizontal direction further improve heating efficiency.
Preferably, the outer tube of interior tube body is exactly the outside wall surface of core.Preferably, interior tube body and core are integration systems
It makes.
It is improved as one, hot water outlet 4 can be removed, such as shown in Fig. 2, only using steam generator as one
Generate the simple function evaporator of steam.
Preferably, exhaust outlet 6 is arranged in 1 top of cabinet.By the way that exhaust outlet 6 is arranged, 1 internal pressure of cabinet is avoided
It is excessive, it is ensured that safety.
Preferably, the cross section of the cabinet 1 is round.
Preferably, the cross section of said inner tube body 2 is square.
Preferably, the middle position of cabinet 1 is arranged in said inner tube body 2.By so set, guaranteeing hot water heating
Uniformity.
Preferably, the cross-sectional area side length of the outer tube of said inner tube body 2 is the 0.01-0.15 of the cross-sectional area of cabinet 1
Times.Further preferably 0.11-0.13 times.
Preferably, intake tunnel 8 is strip slot.
Preferably, intake tunnel 8 is aperture.As shown in Figure 5.It should be noted that be only schematic diagram in Fig. 5, though
Only shown in right Fig. 51 of setting perhaps a rows of openings be actually not limited solely to one or a row, can be in phase
It is arranged on upper and lower position between adjacent electrically heated rod 9 multiple or multiple rows of.
Preferably, the hole shape can be circle or rectangular.
Preferably, 50% or less 1 water level of cabinet is arranged in the aperture.By so set, can guarantee that water energy is enough
Timely enter interior tube body 2 to be internally heated, while also avoiding aperture setting is excessively high steam is caused to overflow from aperture, avoids whole
Pressure is excessive in a cabinet, while the water of eminence also being avoided to enter in interior tube body, and the moisture for causing the steam generated to carry is too
It is more.
Preferably, the conducting wire of connection electric heater 9 is entered by intake tunnel.
Preferably, the conducting wire of connection electric heater 9, which passes through 2 bottom of interior tube body, enters interior tube body 2.
Preferably, groove is arranged in 2 inner wall of said inner tube body, the outside wall surface of the core 7 is arranged in groove.By such as
This setting can be further improved the fastness of core installation.
Preferably, interior tube body 2 is welded for multi-segment structure, core 7 is arranged in the junction of multi-segment structure.By such
Setting can make easy to process, saving cost.
Preferably, the electric heater 9 is resistance heater.
Preferably, resistance heater 9 fills entire square passageway.By be arranged such can guarantee electric heater with
The wall surface of square passageway contacts, and further increases heating efficiency.
Preferably, the core 7 is set to multiple along vertical direction, it is spaced between two neighboring core 7
Intake tunnel is set on outer tube.The vertical direction that the present invention devises the intracorporal core of inner tube is spaced apart, and at interval
Intake tunnel is set on interior tube body, it is ensured that the water at different location timely enters inner tube and heated, can be further
Improve heating efficiency.
Preferably, the center of the centre distance core 7 of square through-hole is remoter, then on vertical direction unit length electricity
The heating power for hindering heater is bigger.For example, in Fig. 3, the heating power of first layer is less than the heating power of the second layer, but the
Two layers of heating power is also different, and particularly the heating power of four apex angles is greater than the heating power of non-apex angle.By vertical
Simulation and experiment discovery, distance center is remoter, then because the area that is related to of heating is bigger, it is therefore desirable to more heating powers,
Especially in outermost layer, because also to heat the water outside interior tube body, it is therefore desirable to vertical direction on unit length heating
It is more powerful.The present invention is further mentioned by the variation of heating power of the electric heater apart from core-center in setting interior tube body
High homogeneous heating degree and heating efficiency.
Preferably, the center of the centre distance core 7 of square through-hole is remoter, then on vertical direction unit length electricity
The amplitude that the heating power of resistance heater is increasing constantly increases.The variation of above-mentioned heating amplitude is also by a large amount of
Numerical simulation and experiment obtain, not the common knowledge of this field.By the variation of above-mentioned amplitude, heating can be further increased
Efficiency and homogeneous heating degree.
Preferably, the core 7 is octagon center core, octagon through-hole is located at the center of core.Such as Fig. 3
It is shown.
Further preferably, 7 center of core is octagon channel, and the regular quadrangle channel is around the two of core
Layer structure, outermost layer are octagon channel, the side length for the octagon through-hole that the side length of the outer tube is 8 times.
By a large amount of numerical simulation with experiment it is known that the different ability of the heating power requirement of different layers electric heater
Reaching uniformly heated purpose, regular quadrangle side length is longer, then since it is desired that the volume of heating is bigger, exterior space is also bigger,
The heating power ratio of the ectonexine then needed is bigger；And the length of core is longer on vertical direction, then because of whole length
Heating surface (area) (HS on degree is bigger, and the distribution of heating is more uniform, therefore the heating power proportion requirement of caused ectonexine is smaller.Cause
This present invention passes through a large amount of vertical simulation and tests heating power and its side length for each layer, highly carried out largely
Research, has obtained optimal heating power relationship.And for the structure of above-mentioned Fig. 3, outermost layer heating power with it is most interior
The ratio of the heating power of layer is to meet following require:
Preferably, the heating power of each electric heater of the first layer is W1, each electric heater of the second layer adds
Thermal power is W2, and H when the described core height, the side length of regular quadrangle is L, then meets following requirement:
W2/W1=a-b*LN(H/L)；Wherein a, b are parameter, 3.3 < a < 3.4,0.90 <b < 0.95；
1.15<W2/W1<1.75；5.9< H/L<10.1；
Total heating power of first layer and the second layer is M, 2500w < M < 5500W.
Preferably, a=3.343, b=0.921.
Preferably, 1.3 < W2/W1 < 1.5；7.1< H/L<8.1；
First layer and the second layer are internal layer and outer layer respectively.
Preferably, a is gradually reduced as H/L increases, b is gradually increased.By be arranged such can further such that plus
It is hot uniform, improve heating efficiency.
Preferably, the caliber of interior tube body 2 constantly becomes larger along direction vertically from the bottom up.Main cause is as follows:
1) pass through the caliber of increase interior tube body 2, it is possible to reduce the resistance of steam flows upward, so that the steam evaporated in interior tube body 2 is not
Disconnected moves towards the increased direction of caliber, to further steam be promoted to rise.2) because with fluid continuous flowing,
Liquid constantly evaporates in interior tube body 2, so that steam volume is increasing, pressure is also increasing, therefore passes through increasing
Add caliber to meet the variation of ever-increasing steam volume and pressure, so that pressure is evenly distributed on the whole.
Preferably, direction from the bottom up along vertical direction, constantly increased amplitude is more next for the caliber of interior tube body 2
It is bigger.The amplitude variation of above-mentioned caliber is that the applicant obtains with numerical simulation through a large number of experiments as a result, by above-mentioned
Setting, further steam can be promoted to flow, it is integrally uniform to reach pressure.
Preferably, the multiple cores 7 of setting in interior tube body 2, from the bottom end of interior tube body 2 to the upper end of interior tube body 2, core 7
Between spacing it is bigger.If the distance apart from 2 bottom end of interior tube body is H, the spacing between adjacent core is S, S=F1(H), i.e., S is
Using distance H as the function of variable, S ' is the first order derivative of S, meets following require:
S’>0;
Main cause is dry caused by avoiding upper steam heating too fast.Heating power by the way that lower part is arranged adds greater than top
Thermal power reheats the water on top so that water is sufficiently heated in lower part in uphill process, on the one hand can guarantee heating
On the other hand full and uniform mixing is also avoided that because heating caused by the water that excessive caused top is heated on top first evaporates is dry
Dry up phenomenon.Therefore the distance between the adjacent core for needing to be arranged is shorter and shorter.
It is found through experiments that, by above-mentioned setting, can both keep the whole uniform of heating to the full extent, while can
To improve heating effect.
Further preferably, from the entrance of interior tube body 2 to the outlet of interior tube body 2, the distance between adjacent core is increasing
Amplitude be continuously increased.That is S " is the second derivative of S, meets following require:
S”>0;
Be found through experiments that, by so set, can further keep heating it is whole uniformly, while heating effect can be improved
Fruit.It should be noted that above-mentioned rule is the rule that applicant obtains with numerical simulation through a large number of experiments, it is not ability
The common knowledge or conventional means in domain.
Preferably, the multiple cores of setting in interior tube body 2, from the bottom end of interior tube body 2 to the upper end of interior tube body 2, not same core
The heating power for the electric heater arranged in each regular quadrangle of body is gradually reduced.If the distance apart from 2 bottom end of interior tube body is
H, the interior electric heater capacity arranged of each regular quadrangle of adjacent core is W, S=F3(H), i.e. W is using distance H as variable
Function, W ' are the first order derivatives of W, meet following require:
W’<0;
Main cause is dry caused by avoiding upper steam heating too fast.Heating power by the way that lower part is arranged adds greater than top
Thermal power reheats the water on top so that water is sufficiently heated in lower part in uphill process, on the one hand can guarantee heating
On the other hand full and uniform mixing is also avoided that because heating caused by the water that excessive caused top is heated on top first evaporates is dry
Dry up phenomenon.Therefore the distance between the adjacent core for needing to be arranged is shorter and shorter.
It is found through experiments that, by above-mentioned setting, can both keep the whole uniform of heating to the full extent, while can
To improve heating effect.
Further preferably, from the entrance of interior tube body 2 to the outlet of interior tube body 2, cloth in each regular quadrangle of adjacent core
The amplitude that the electric heater capacity set becomes smaller is continuously increased.That is W " is the second derivative of S, meets following require:
W">0；
Be found through experiments that, by so set, can further keep heating it is whole uniformly, while heating effect can be improved
Fruit.It should be noted that above-mentioned rule is the rule that applicant obtains with numerical simulation through a large number of experiments, it is not ability
The common knowledge or conventional means in domain.
Preferably, the multiple cores of setting in interior tube body 2, from the bottom end of interior tube body 2 to the upper end of interior tube body 2, square
Side length it is smaller and smaller.Distance apart from 2 entrance of interior tube body is H, and square side length is C, C=F2(H), C ' is once leading for C
Number meets following require:
C'<0；
Main cause be it is smaller because being square side length, then manufacture more difficult, but the uniformity integrally heated is better.Because more
To top, it should the whole homogeneous heating for keeping water avoids partially dryouting caused by heating is uneven, and more arrives top,
Because steam also will will reinforce the uniformity of steam outlet and heating by exporting away.It, can be with by above-mentioned setting
Cost is saved, and reaches best homogeneous heating and steam output efficiency, while avoiding dryouting.
Further preferably, the entrance of interior tube body 2 is to the outlet of interior tube body 2, and the smaller and smaller amplitude of square side length is not
Disconnected increase.C " is the second derivative of C, meets following require:
C”>0。
Preferably, the distance between adjacent core remains unchanged.
Be found through experiments that, by so set, can further keep heating it is whole uniformly, while can be improved plus
Thermal effect.It should be noted that above-mentioned rule is the rule that applicant obtains with numerical simulation through a large number of experiments, it is not
The common knowledge or conventional means of this field.
Preferably, the center of square through-hole centre distance core is remoter, then on vertical direction unit length resistance
The heating power of heater is bigger.
Because by experiment and numerical simulation it is known that outward, then the volume for needing to heat is bigger, especially most
Outside needs the water in the water and inner tube of heated periphery.The present invention is by electric heater in setting interior tube body apart from core-center
Heating power variation, further improve homogeneous heating degree and heating efficiency.
Preferably, center of the square through-hole apart from core is remoter, then on vertical direction unit length resistance heating
The amplitude that the heating power of device is increasing constantly increases.By so rule setting, homogeneous heating degree is further improved
And heating efficiency.
Preferably, along short transverse (i.e. direction from the bottom up, appear below along short transverse, if do not had
Specified otherwise all refers to direction from the bottom up), the aperture is set as multiple rows of.
It is multiple rows of by being arranged, it is ensured that different height and position water inlets avoids an independent position from intaking, causes to heat
It is uneven, while the water avoided enter into is evaporated, and causes to dry up in heating tube.
Preferably, the distribution density of the aperture is smaller and smaller along short transverse.The density of aperture distribution is increasingly
It is small, that is, mean the fewer and fewer of aperture distribution, the area of aperture is also just smaller and smaller.
By a large amount of numerical simulation and its experimental studies have found that, by setting aperture distribution density it is smaller and smaller, mainly
The reason is that guaranteeing that most of water is heated in lower part, becomes constantly there is water to enter interior tube body 2 in steam uphill process in water, continue
Heating.If lower part water inlet is few, lower part water fast vaporizing may cause, cause in interior tube body 2 that pressure is excessive, cause top
Water is also because pressure considerations cannot be introduced into interior tube body.Reduce the dry of interior tube body, while improving heating efficiency.
Further preferably, along short transverse, the amplitude that the distribution density of the aperture is smaller and smaller constantly increases.
By largely testing and numerical simulation is by the variation of above-mentioned aperture distribution density to further increase
Heating efficiency improves the output efficiency of steam, while it is intracorporal dry to reduce inner tube.
Preferably, the area of single aperture is smaller and smaller along short transverse.Further preferably, along short transverse,
The amplitude that the area of single aperture is smaller and smaller constantly increases.Specific reason referring to aperture distribution density variation.
Preferably, the sum of area of every rows of openings is smaller and smaller along short transverse.Preferably, along height
Direction is spent, the smaller and smaller amplitude of the sum of area of every rows of openings is continuously increased.Specific reason is referring to aperture distribution density
Variation.
Preferably, the spacing between every rows of openings is increasing along short transverse.Preferably, along height
Direction is spent, the increasing amplitude of the spacing between every rows of openings is continuously increased.Specific reason is referring to aperture distribution density
Variation.
Preferably, the heating power of the unit length of electrically heated rod 9 is constantly reduced along short transverse.By setting
The heating power for setting electrically heated rod 9 is constantly reduced, and guarantees that the fluid of lower part quickly heats, then hot fluid passes through free convection
Top is arrived, the fluid outside the fluid on top and the interior tube body 2 of its underpart rapidly enters, and can further increase heating effect
Rate.By largely testing and numerical simulation is by the variation of above-mentioned interior tube body heating power can further increase 10%
The heating efficiency of left and right saves heating time.
Preferably, the amplitude of the continuous reduction of the heating power of the unit length of electrically heated rod 9 is not along short transverse
Disconnected increase.
By largely testing and numerical simulation, by the variation of above-mentioned 9 heating power amplitude of electrically heated rod, Neng Goujin
One step improves 5% heating efficiency, further saves heating time.
Preferably, the same intracorporal same electrically heated rod 9 of core divides for multistage, along short transverse, different sections
The heating power of unit length is different.Wherein along short transverse, the heating power of the unit length of different sections is constantly reduced.
Further preferably, reduced amplitude constantly increases.
Preferably, every section of length is identical.
Preferably, the heating power of every section of unit length is identical.
Specific reason is as above.
It is segmented by setting, it can be further such that being simple to manufacture conveniently.
It is learnt by analyzing and testing, the spacing between vertical direction core cannot be excessive, leads to steam if excessive
The effect of generation is bad, while can not be too small, causes to be easy to dryout in inner tube if too small, similarly, square side length
Cannot be too large or too small, it is excessive to cause heating uneven, it is too small to cause regular quadrangle and octagon distribution overstocked, it causes to flow
Resistance increases and processing cost increases.Therefore the present invention is through a large number of experiments, the case where preferentially meeting steam quantity of steam
Under, so that being optimal of resistance, has arranged the optimal relationship of parameters.
Preferably, the distance between adjacent core is S1, square side length is L, and core is square section, core
The side length of square section is B2, meets following require:
10*L/B2=a-b*(S1/B2);
Wherein a, b are parameters, wherein 0.95 < a < 0.96,0.158 <b < 0.165；
90<B2<240mm；
8<L<30mm；
29<S1<110mm。
Further preferably, a=0.956, b=0.163;
Further preferably, with the increase of L/B2, a is increasing, and b is smaller and smaller.
Preferably, the side length L of square through-hole is the average value of side length and outer side length in square through-hole, core is square
The side length B2 of tee section is the average value of side length and outer side length in core square section.
The distance between adjacent core is that S1 is with the distance in the opposite face of adjacent core.Such as the upper surface of lower core
The distance between lower end surface of top core.
Preferably, with the increase of B2, L is also continuously increased.But with the increase of B2, the ever-increasing amplitude of L is got over
Come smaller.This rule variation is obtained by a large amount of numerical simulation and experiment, can be into one by the variation of above-mentioned rule
Step improves heat transfer effect, reduces noise.
Preferably, with the increase of B2, S1 constantly reduces.But with the increase of B2, the ever-reduced amplitude of S1 is got over
Come smaller.This rule variation is obtained by a large amount of numerical simulation and experiment, can be into one by the variation of above-mentioned rule
Step improves heat transfer effect, reduces noise.
Core height H is preferably 100-500mm, is further selected as 200-300mm.
Although the present invention has been disclosed in the preferred embodiments as above, present invention is not limited to this.Any art technology
Personnel can make various changes or modifications, therefore protection scope of the present invention is answered without departing from the spirit and scope of the present invention
When being defined by the scope defined by the claims..
Claims (7)
1. a kind of design method of steam generator, the steam generator includes cabinet and interior tube body, the setting of said inner tube body
In cabinet, said inner tube body includes outer tube and the core that is arranged in outer tube, and said inner tube body is that vertical direction is arranged, described
Extend on interior tube body vertical direction where core；The core is square through-hole and octagon through-hole composition, the pros
The side length of shape through-hole is equal to the side length of octagon through-hole, and four sides of the square through-hole are four different positive eight respectively
While shape through-hole while, four of octagon through-hole apart from one another by while be respectively four different square through-holes while；Just
Electric heater is set in square through hole；The electric heater is divided into multilayer and is arranged around the center of core, and every layer of electricity adds
The ratio of thermal power is designed according to the side length L of core height H and regular quadrangle.
2. the design method of steam generator as described in claim 1, which is characterized in that the cross section of the cabinet is round
Shape, the cross section of said inner tube body are squares.
3. the design method of steam generator as claimed in claim 2, which is characterized in that the core-center is octagon
Channel, the regular quadrangle channel are the double-layer structure around core, and outermost layer is octagon channel, the side length of the outer tube
For the side length of 8 times of square passageway.
4. the design method of steam generator as claimed in claim 3, which is characterized in that each electric heater of internal layer adds
Thermal power is W1, and the heating power of each electric heater of outer layer is W2, and the core height is H, the side length of regular quadrangle
For L, then meet following requirement:
W2/W1=a-b*LN(H/L)；Wherein a, b are parameter, 3.3 < a < 3.4,0.90 <b < 0.95；
1.15<W2/W1<1.75；5.9< H/L<10.1；
Total heating power of internal layer and outer layer is M, 2500W < M < 5500W.
5. the design method of steam generator as claimed in claim 4, which is characterized in that a=3.343, b=0.921.
6. the design method of steam generator as claimed in claim 4, which is characterized in that as H/L increases, a is gradually reduced,
B is gradually increased.
7. a kind of steam generator, the steam generator includes that cabinet, interior tube body, cold water inlet, hot water outlet and steam go out
Mouthful, on the side wall of the box body, said inner tube body is arranged in cabinet for cold water inlet setting, said inner tube body include outer tube and
Core in outer tube is set, and said inner tube body is vertical direction setting, and intake tunnel, guard box is arranged in said inner tube body lower part
The water of body is able to enter interior tube body and is heated, and the top of interior tube body connects steam (vapor) outlet；The core includes aquaporin and electricity
Heater；The hot water outlet setting is on the side wall of the box body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811234245.5A CN109695863B (en) | 2018-10-23 | 2018-10-23 | Steam generator design method for optimizing power of electric heater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811234245.5A CN109695863B (en) | 2018-10-23 | 2018-10-23 | Steam generator design method for optimizing power of electric heater |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777877A (en) * | 2012-08-03 | 2012-11-14 | 梁首强 | Method for quickly producing water vapor and steamed furnace using same |
| CN202647693U (en) * | 2012-05-31 | 2013-01-02 | 莱克电气股份有限公司 | Steam generator with cylindrical articles |
| CN107314357A (en) * | 2017-07-31 | 2017-11-03 | 山东交通学院 | The steam generator that perforated area changes in a kind of short transverse |
| CN207262404U (en) * | 2017-07-31 | 2018-04-20 | 山东交通学院 | A kind of steam generator for producing steam and hot water dual-use function |
| CN108679589A (en) * | 2017-07-31 | 2018-10-19 | 山东交通学院 | A kind of steam generator of setting intake tunnel |
-
2018
- 2018-10-23 CN CN201811234245.5A patent/CN109695863B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202647693U (en) * | 2012-05-31 | 2013-01-02 | 莱克电气股份有限公司 | Steam generator with cylindrical articles |
| CN102777877A (en) * | 2012-08-03 | 2012-11-14 | 梁首强 | Method for quickly producing water vapor and steamed furnace using same |
| CN107314357A (en) * | 2017-07-31 | 2017-11-03 | 山东交通学院 | The steam generator that perforated area changes in a kind of short transverse |
| CN207262404U (en) * | 2017-07-31 | 2018-04-20 | 山东交通学院 | A kind of steam generator for producing steam and hot water dual-use function |
| CN108679589A (en) * | 2017-07-31 | 2018-10-19 | 山东交通学院 | A kind of steam generator of setting intake tunnel |
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| CN109695863B (en) | 2020-06-05 |
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