The content of the invention
The present invention, there is provided a kind of steam dryer of intelligent control, is also provided simultaneously for deficiency of the prior art
A kind of Electrothermic steam drying machine of Novel structure, and the steam dryer has that heating is rapid, uniformity of temperature profile, power
Automatically control, safe and reliable function, improve the efficiency of heating surface.
To achieve the above object, the present invention is adopted the following technical scheme that:
A kind of steam dryer, including body of heater, water tank, water pump, the water tank connect water pump, the water by the first pipeline
Pump is connected by the second pipeline sets electric heater unit in body of heater, the body of heater, the upper of furnace body sets steam (vapor) outlet pipeline,
The water tank inlet porting pipeline;Characterized in that, setting level sensor, the level sensor, electricity in described body of heater
Heater, water pump and controller data are connected, and the controller is according to the work(of the water level automatically controlled water pump in the body of heater of measurement
Rate.
If preferably, water level decreasing, controller is then increased into body of heater by controlling to improve the power of water pump
The flow of water, if water level is too high, is reduced into body of heater by the power for reducing the power of water pump or switching off the pump
Water-carrying capacity stops supplying water into body of heater.
Preferably, when the water level of measurement is less than the first water level, controller control water pump is supplied water with the first power;
When the water level of measurement is less than second water level lower than the first water level, controller controls water pump with the second work(higher than the first power
Rate is supplied water;When the water level of measurement is less than three water level lower than the second water level, controller controls water pump with higher than second
3rd power of power is supplied water;When the water level of measurement is less than four water level lower than the 3rd water level, controller control water
Pump is supplied water with the 4th power higher than the 3rd power;When the water level of measurement is less than five water level lower than the 4th water level,
Controller control water pump is supplied water with the 5th power higher than the 4th power.
Preferably, the first water level is 1.1-1.3 times of the second water level, the second water level is 1.1-1.3 times of the 3rd water level,
3rd water level is 1.1-1.3 times of the 4th water level, and the 4th water level is 1.1-1.3 times of the 5th water level.
Preferably, the first water level is 1.1-1.15 times of the second water level, the second water level is the 1.15-1.2 of the 3rd water level
Times, the 3rd water level is 1.2-1.25 times of the 4th water level, and the 4th water level is 1.25-1.3 times of the 5th water level.
Preferably, the 5th power is 1.7-1.9 times of the 4th power, the 4th power is 1.6-1.8 times of the 3rd power,
3rd power is 1.5-1.7 times of the second power, and the second power is 1.3-1.5 times of the first power.
Preferably, setting jet pipe on the wall of the body of heater, spray orifice, the second pipeline connection are set on the jet pipe
Jet pipe, is sent into jet pipe by water by water pump, is then sprayed by spray orifice.
Preferably, the electric heater unit includes left pipe box, right pipe box and floating coiled pipe, floating coiled pipe and left pipe box and
Right pipe box is connected, and forms heating fluid closed circulation, and electrically heated rod is arranged in left pipe box and right pipe box;Left pipe box, right pipe
Filling heating fluid in case and floating coiled pipe;Floating coiled pipe is one or more, and each floating coiled pipe includes many circular arcs
Tube bank, the center line of the tube bank of many circular arc is the circular arc of concentric circles, the end connection of adjacent tube bank, so that tube bank
End formed tube bank free end.
Preferably, the electric heater unit includes left pipe box, right pipe box and floating coiled pipe, floating coiled pipe and left pipe box and
Right pipe box is connected, and forms heating fluid closed circulation, and electrically heated rod is arranged in left pipe box and right pipe box;Left pipe box, right pipe
Filling heating fluid in case and floating coiled pipe;Floating coiled pipe is one or more, and each floating coiled pipe includes many circular arcs
Tube bank, the center line of the tube bank of many circular arc is the circular arc of concentric circles, the end connection of adjacent tube bank, so that tube bank
End formed tube bank free end;The concentric circles is the circle using the center of left pipe box as the center of circle, and the internal diameter of left pipe box is D1, right
The internal diameter of bobbin carriage is D2, and the power of the electrically heated rod of left pipe box is G1, and the power of the electrically heated rod of right pipe box is G2, is met as follows
Relation:
G1/G2=a* (D1/D2)2-b*(D1/D2)+c;
A, b, c are coefficients, wherein the < c < 2.77 of 0.82 < a <, 0.91,1.95 < b < 2.05,2.67;
Wherein 58mm < D1 < 87mm;
29mm < D2 < 68mm;
1.2 < D1/D2 < 2.1:
1600W < G1 < 2500W;
670W < G2 < 1680W.
Preferably, with D1/D2 increase, a, c increases, b reduces.
The invention has the advantages that:
1st, the present invention automatically controls the stabilization of water level in steam dryer by the power of pump, so as to keep steam output
It is stable, improve intellectuality.
2nd, floating coiled pipe is applied to the heating of steam dryer by the present invention, by setting floating coiled pipe, heating fluid by
Volumetric expansion, induction floating coiled pipe free end BC, B can be produced after heat ' C ' vibration is produced, so that augmentation of heat transfer.
3rd, the present invention optimizes the best relation of the parameter of floating coiled pipe, so as to further improve by substantial amounts of experiment
The efficiency of heating surface.
4th, the present invention is by the way that electric heater is arranged in bobbin carriage, therefore directly fluid can be avoided to be connect with electric heater
Touch, so as to avoid getting an electric shock, play a part of protection.
5th, the present invention is by the setting of the electric heater capacities of different bobbin carriages, improves the uniform of the efficiency of heating surface and its heating
Property.
Embodiment
A kind of drying machine as shown in Figure 1, including body of heater 1, water tank 2, water pump 4, the water tank 2 connect water by pipeline 15
Pump 4, the water pump 4 is connected by pipeline 14 sets electric heater unit 6 in body of heater 1, the body of heater 1, the top of body of heater 1 is set
Steam (vapor) outlet pipeline 7, the inlet porting pipeline 3 of water tank 2.Steam (vapor) outlet pipeline 7 connects jet chimney, passes through jet chimney pair
Material is dried.After steam is utilized, entered by entrance pipe 3 in water tank 2, to reach the purpose recycled.
Described water is entered in body of heater 1 from water tank 3 by water pump 4, is heated in body of heater 1 by electric heater unit 6, is produced
Steam discharged by steam (vapor) outlet pipeline 7.
Preferably, the steam that steam (vapor) outlet pipeline 7 is discharged is for example into jet chimney, being set on the jet chimney needs
The object to be dried, such as clothes.Certainly, steam can also enter in the steam pipe in dry kiln, such as rotary kiln.Steam
After being utilized, entered by entrance pipe 3 in water tank 2, to reach the purpose recycled.
Preferably, entrance pipe 3 connects running water pipe, water is supplemented by running water pipe.Preferably, running water pipe and
Purifier is set between water tank 2, running water is purified, it is to avoid the fouling of electric heater unit in water tank, influence heating
Effect.
Preferably, the cross section of the body of heater 1 is circular configuration.
Preferably, the outside of body of heater 1 sets shell body 16, the water tank 4, water pump 2 are arranged in shell body 16.
Preferably, the electric heater unit 6 is multiple.The electric heating feeder apparatus 6 is set close to the vertical inner wall face of body of heater 1
Put, as shown in Figure 1.
Preferably, being set on the wall of the body of heater 1, spray orifice 13 is set on jet pipe 5, the jet pipe 5.The pipeline 14
Connecting spray nozzle 5, is sent into jet pipe 5 by water by water pump, is then sprayed by spray orifice 13.
By setting jet pipe and spray orifice, water can be caused more to be evenly dispersed in the hot device of motor, further promoted
The generation of steam.
Preferably, as shown in figure 3, the jet pipe 5 sets a whole circle around the vertical inner wall of body of heater.By so setting
Put, the jet pipe 5 on whole inwall can be caused to connect so that water enters can be in the position of a whole circle of inboard wall of furnace body after jet pipe 5
Ejection water is put, so as to improve the output capacity of steam.
The present invention can realize following control:
(1) temperature control
Preferably, setting temperature sensor 12, the temperature for measuring the reclaimed water of body of heater 1 in the body of heater 1.The temperature
Sensor 12, electric heater unit 6 and the data cube computation of controller 8, the temperature that the controller 8 is measured according to temperature sensor 12 come
The heating power of automatic control electrical heating device 6.
If preferably, the temperature that temperature sensor 12 is measured is less than certain temperature, controller control electrical heating
Device 6 starts heating.If the temperature of temperature sensor measurement is higher than certain temperature, such as higher than dangerous critical-temperature,
Then in order to avoid overheat, controller control electric heater unit 6 stops heating.
Preferably, if detection temperature data are less than the first numerical value, controller 8 improves electric heater unit 6 automatically
Heating power, if the temperature data of measurement is higher than second value, controller 8 reduces the heating work(of electric heater unit 6 automatically
Rate, the second value is more than the first numerical value.
Preferably, when the temperature of measurement is less than the first temperature, electric heater unit 6 starts heating, and with the first power
Heated;When the temperature of measurement is less than the second temperature lower than the first temperature, electric heater unit 6 is with higher than the first power
Second power is heated;When the temperature of measurement is less than three temperature lower than second temperature, electric heater unit 6 is with higher than the
3rd power of two power is heated;When the temperature of measurement is less than four temperature lower than the 3rd temperature, electric heater unit 6
Heated with the 4th power higher than the 3rd power;When the temperature of measurement is less than five temperature lower than the 4th temperature, electricity
Heater 6 is heated with the 5th power higher than the 4th power.
Preferably, the first temperature is more than 4-6 degrees Celsius of second temperature, second temperature is more than the 3rd 4-6 degrees Celsius of temperature,
3rd temperature is more than the 4th 4-6 degrees Celsius of temperature, and the 4th temperature is more than the 5th 4-6 degrees Celsius of temperature.
Further preferably, the first temperature is more than 5.5-6 degrees Celsius of second temperature, and second temperature is more than the 3rd temperature 5-5.5
Degree Celsius, the 3rd temperature is more than the 4th 4.5-5 degrees Celsius of temperature, and the 4th temperature is more than the 5th 4-4.5 degrees Celsius of temperature.
Preferably, the 5th power is 1.1-1.3 times of the 4th power, the 4th power is 1.1-1.3 times of the 3rd power,
3rd power is 1.1-1.3 times of the second power, and the second power is 1.1-1.3 times of the first power.
Preferably, the 5th power is 1.1-1.15 times of the 4th power, the 4th power is the 1.15-1.2 of the 3rd power
Times, the 3rd power is 1.2-1.25 times of the second power, and the second power is 1.25-1.3 times of the first power.
, can be with especially by the setting of differential heating power and the temperature difference by the preferred of said temperature and power
The efficiency of heating surface is further improved, the time is saved.It is found through experiments that, it is possible to increase 10-15% or so the efficiency of heating surface.
Preferably, the temperature sensor 12 is arranged on the bottom wall of body of heater.
Preferably, the temperature sensor 12 is multiple, the temperature data of the controller foundation is that multiple temperature are passed
The temperature that sensor 12 is measured, to control the operation of steam dryer.
(2) water level control
Preferably, setting level sensor 11, the level sensor 11, electric heater 6, water in described body of heater 1
Pump 4 and the data cube computation of controller 8, the controller 8 is according to the power of the water level automatically controlled water pump 4 in the body of heater 1 of measurement.
If preferably, water level decreasing, controller is then increased into body of heater 1 by controlling to improve the power of water pump 4
Water flow, if water level is too high, 4 reduced by reducing the power of water pump 4 or switching off the pump into water in body of heater 1
Flow stops supplying water into body of heater 1.
By above-mentioned setting, on the one hand avoid that the too low steam generation rate caused of water level is too low and electric heater unit
Dry combustion method, cause the damage of electric heater unit and produce security incident, on the other hand, it is to avoid because water level is too high and causes
Water it is excessive, so as to cause steam generation rate too low.
Preferably, when the water level of measurement is less than the first water level, the control water pump 4 of controller 8 is supplied with the first power
Water;When the water level of measurement is less than second water level lower than the first water level, controller 8 controls water pump 4 with higher than the first power
Second power is supplied water;When measurement water level be less than three water level lower than the second water level when, controller 8 control water pump 4 with
The 3rd power higher than the second power is supplied water;When the water level of measurement is less than four water level lower than the 3rd water level, control
The control water pump 4 of device 8 is supplied water with the 4th power higher than the 3rd power;When the water level of measurement is less than lower than the 4th water level by the
During five water levels, the control water pump 4 of controller 8 is supplied water with the 5th power higher than the 4th power.
Preferably, the first water level is 1.1-1.3 times of the second water level, the second water level is 1.1-1.3 times of the 3rd water level,
3rd water level is 1.1-1.3 times of the 4th water level, and the 4th water level is 1.1-1.3 times of the 5th water level.
Preferably, the first water level is 1.1-1.15 times of the second water level, the second water level is the 1.15-1.2 of the 3rd water level
Times, the 3rd water level is 1.2-1.25 times of the 4th water level, and the 4th water level is 1.25-1.3 times of the 5th water level.
Preferably, the 5th power is 1.7-1.9 times of the 4th power, the 4th power is 1.6-1.8 times of the 3rd power,
3rd power is 1.5-1.7 times of the second power, and the second power is 1.3-1.5 times of the first power.
By the preferred of above-mentioned water level and pump power, especially by the setting of differential water level and pump power,
The constant of water level can be quickly realized, steam generation rate is improved, the time is saved.It is found through experiments that, it is possible to increase 12-16%
The steam output of left and right.
(3) control according to water level to heating power
Preferably, level sensor 11 is set in described body of heater 1, the level sensor 11, electric heater 6 and control
The data cube computation of device 8 processed, the controller 8 is according to the heating power of the water level automatic controlled electric heater in the body of heater 1 of measurement.
Preferably, if water level is too low, controller is then by controlling to reduce the power of electric heater 6 or directly closing
The heating of electric heater 6, so as to avoid, because the too high steam output caused of heating power is excessive, causing the further drop of water level
It is low, if water level is too high, by increasing the heating power of electric heater 6, steam output is improved, so as to reduce water level.
By above-mentioned setting, the too low dry combustion method for causing electric heater unit of water level is on the one hand avoided, causes electrical heating to fill
The damage put and security incident is produced, on the other hand, it is to avoid excessive because the water in the body of heater that water level is too high and causes,
So as to cause steam generation rate too low.
Preferably, when the water level of measurement is less than the first water level, controller 8 controls electric heater unit 6 with the first power
Heated;When the water level of measurement is less than second water level lower than the first water level, controller 8 controls electric heater unit 6 with low
Heated in the second power of the first power;When the water level of measurement is less than three water level lower than the second water level, controller 8
Control electric heater unit 6 is heated with the 3rd power less than the second power;When the water level of measurement is less than lower than the 3rd water level
Four water levels when, controller 8 control electric heater unit 6 heated with the 4th power less than the 3rd power;When measurement
When water level is less than five water level lower than the 4th water level, controller 8 controls electric heater unit with the 5th work(less than the 4th power
Rate is heated;When the water level of measurement is less than six water level lower than the 5th water level, the control electric heater unit of controller 8 stops
Heating.
Preferably, the first water level is 1.1-1.3 times of the second water level, the second water level is 1.1-1.3 times of the 3rd water level,
3rd water level is 1.1-1.3 times of the 4th water level, and the 4th water level is 1.1-1.3 times of the 5th water level.
Preferably, the first water level is 1.1-1.15 times of the second water level, the second water level is the 1.15-1.2 of the 3rd water level
Times, the 3rd water level is 1.2-1.25 times of the 4th water level, and the 4th water level is 1.25-1.3 times of the 5th water level.
Preferably, the first power is 1.6-1.7 times of the second power, the second power is 1.5-1.6 times of the 3rd power,
3rd power is 1.4-1.5 times of the 4th power, and the 4th power is 1.3-1.4 times of the 5th power.
By the preferred of the power of above-mentioned water level and electric heater unit, filled especially by differential water level and electrical heating
The setting for the power put, can quickly realize water level in predetermined home, and water level it is too high when can protect
Steam generation rate is demonstrate,proved, the time is saved.
(4) Stress control
Preferably, pressure sensor 17 is set in the body of heater 1, for measuring pressure in body of heater 1.The pressure sensing
Device 17, electric heater unit 6 and the data cube computation of controller 8, the pressure that the controller 8 is measured according to pressure sensor are controlled automatically
The heating power of electric heater unit 6 processed.
If preferably, the pressure that pressure sensor 17 is measured is less than certain pressure, the control electrical heating of controller 8
Device 6 starts heating.If the temperature of pressure sensor measurement is higher than pressure upper limit, danger is produced in order to avoid pressure is excessive
Danger, controller control electric heater unit 6 stops heating.
By being arranged such, heating power can be adjusted according to the pressure in body of heater 1, so as to ensure maximizing steam
In the case of output, it is ensured that the safety of steam dryer.
If preferably, the pressure that pressure sensor 17 is measured is less than a certain numerical value, the control electrical heating dress of controller 8
Put 6 raising heating powers.If the temperature of pressure sensor measurement is higher than certain numerical value, danger is produced in order to avoid pressure is excessive
Danger, the controller control reduction heating power of electric heater unit 6.
Preferably, when the pressure of measurement is higher than first pressure, controller 8 controls the heating power of electric heater unit 6
The first power is reduced to be heated;When the pressure of measurement is higher than the second pressure higher than first pressure, controller 8 controls electricity
The heating power of heater 6 is reduced to second power lower than the first power and heated;When the pressure of measurement is higher than than the
During high three pressure of two pressure, the heating power of the control electric heater unit 6 of controller 8 is reduced to threeth lower than the second power
Power is heated;When the pressure of measurement is higher than four pressure higher than the 3rd pressure, the control electric heater unit 6 of controller 8
Heating power be reduced to fourth power higher than the 3rd power and heated;When the pressure of measurement is higher than higher than the 4th pressure
During five pressure, controller 8 stops the heating of electric heater unit 6.
Preferably, the 4th power is 0.4-0.6 times of the 3rd power, the 3rd power is 0.6-0.8 times of the second power,
Second power is 0.7-0.9 times of the first power.
Further preferably, preferably, the 4th power is 0.5 times of the 3rd power, the 3rd power is the 0.7 of the second power
Times, the second power is 0.8 times of the first power.
5th pressure is exactly pressure upper limit.
The pressure sensor 17 is arranged on the upper position of body of heater.
Preferably, the pressure sensor 17 is multiple, the pressure data of the controller foundation is that multiple pressure are passed
The temperature that sensor 17 is measured, to control the operation of steam dryer.
(5) steam flow is controlled
Preferably, setting flow sensor 9, the steaming for cooling water of units of measurement time output on the steam (vapor) outlet pipeline 7
Steam flow amount, the flow sensor 9, electric heater 6 and the data cube computation of controller 8.The controller 8 is according to the steam stream of measurement
Measure the power of automatic controlled electric heater.
Preferably, if the steam flow of measurement is less than certain numerical value, the control electric heater unit 6 of controller 8 increases
Plus heating power.If the temperature of pressure sensor measurement is higher than certain numerical value, the controller control reduction of electric heater unit 6 adds
Thermal power.
By being arranged such, the quantity of steam that can be produced according to steam dryer adjusts heating power, it is ensured that steam
Output quantity it is constant, it is to avoid quantity is excessive or too small, causes quantity of steam not enough or wastes.
Preferably, when the flow of measurement is higher than first flow, controller 8 controls the heating power of electric heater unit 6
The first power is reduced to be heated;When the flow of measurement is higher than the second flow higher than first flow, controller 8 controls electricity
The heating power of heater 6 is reduced to second power lower than the first power and heated;When the flow of measurement is higher than than the
During high three flow of two flows, the heating power of the control electric heater unit 6 of controller 8 is reduced to threeth lower than the second power
Power is heated;When the flow of measurement is higher than four flow higher than the 3rd flow, the control electric heater unit 6 of controller 8
Heating power be reduced to fourth power higher than the 3rd power and heated;When the flow of measurement is higher than higher than the 4th flow
During five flows, controller 8 stops the heating of electric heater unit 6.
Preferably, the 4th power is 0.4-0.6 times of the 3rd power, the 3rd power is 0.6-0.8 times of the second power,
Second power is 0.7-0.9 times of the first power.
Further preferably, preferably, the 4th power is 0.5 times of the 3rd power, the 3rd power is the 0.7 of the second power
Times, the second power is 0.8 times of the first power.
Further preferably, the 5th flow is 1.1-1.2 times of the 4th flow, and the 4th flow is the 1.2-1.3 of the 3rd flow
Times, the 3rd flow is 1.3-1.4 times of second flow, and second flow is 1.4-1.5 times of first flow.
By the preferred of the power of above-mentioned flow and electric heater unit, filled especially by differential flow and electrical heating
The setting for the power put, can quickly realize the constant of flow, save the time.
Another object of the present invention is to provide a kind of new-type electric heater unit, steam dryer is particularly suitable for
Electric heater unit.
Fig. 4 illustrates the tangent plane schematic diagram of electric heater unit 6, and the electric heater unit 6 includes left pipe box 19, right pipe box 21
With floating coiled pipe 18, floating coiled pipe 18 is connected with left pipe box 19 and right pipe box 21, and heating fluid is in left pipe box 19 and right pipe box
21 and floating coiled pipe in carry out closed circulation, electric heater 23 is set in the electric heater unit 6, and the electric heater 23 is used
In the interior fluid of heating electric heater unit 6, the water in water tank is then heated by the fluid of heating.
Preferably, electric heater unit 6 is arranged in left pipe box 19 or right pipe box 21.
Floating coiled pipe 18 is one group or multigroup, and every group of floating coiled pipe 18 includes the tube bank 22 of many circular arc, many circles
The center line of the tube bank 22 of arc is the circular arc of concentric circles, the end connection of adjacent tube bank 22, so that the end of coil pipe 18
The free end 20 formed in tube bank free end 20, such as Fig. 5.
Heating fluid is subsequently filled preferably, being vacuumized in described electric heater unit.
Preferably, heating fluid is ammonia, methanol or ethanol.
Preferably, heating fluid is one kind in caesium, rubidium.
Traditional floating coiled pipe is all to carry out vibration scale removal effect using the impact of the flowing of fluid to carry out augmentation of heat transfer, all
It is to be used for forced-convection heat transfer, and the water poor fluidity in steam dryer, it is impossible to carry out forced-convection heat transfer flowing, and this hair
It is bright that floating coiled pipe is applied to steam dryer first, volume can be produced by setting floating coiled pipe, after heating fluid is heated swollen
Swollen, induction floating coiled pipe 18 free end 20 produces vibration, because the vibration is transferred to ambient water, and disturbance effect is produced to the water of surrounding
Really, so as to generate the effect of augmentation of heat transfer.
In the present invention, because electric heater 23 is arranged in bobbin carriage 19,21, therefore fluid can be directly avoided to add with electricity
Hot device contact, so as to avoid getting an electric shock, plays a part of protection.
As with preferred, the left pipe box 19, right pipe box 21 and floating coiled pipe 18 are all circular tube structures.
Preferably, the tube bank of floating coiled pipe 18 is elastic tube bundle.
By the way that the tube bank of floating coiled pipe 18 is set into elastic tube bundle, the coefficient of heat transfer can be further improved.
Preferably, the concentric circles is the circle using the center of left pipe box 19 as the center of circle.That is the tube bank 22 of floating coiled pipe 18
Center line around left pipe box 19 is arranged.
As shown in figure 5, tube bank 22 is not a complete circle, but an oral area is reserved, so as to form the freedom of tube bank
End.Angle where the circular arc of the oral area is that 65-85 degree, i.e. Fig. 6 angles b and c sum are 65-85 degree.
Preferably, the caliber of the left pipe box 19 is more than the caliber of right pipe box 21.
By above-mentioned setting, can further augmentation of heat transfer, improve 8-15% heat exchange efficiency.
Preferably, the internal diameter of left pipe box is D1, the internal diameter of right pipe box is D2, then 1.5 < D1/D2 < 2.5.
It is preferably provided with by above-mentioned, enables to heat exchange efficiency to reach most preferably.
Preferably, with more remote apart from the center of left pipe box 19, the distance between adjacent tube bank is increasing.
Preferably, the increasing amplitude of the distance between adjacent tube bank constantly increases.
It is preferably provided with by above-mentioned, can further improves heat exchange efficiency, increases the uniformity of heating.By testing hair
It is existing, 10-11% heat exchange efficiency can be improved by above-mentioned setting.
Preferably, with more remote apart from the center of left pipe box 19, the diameter of tube bank is increasing.
Preferably, the increasing amplitude of the diameter of tube bank constantly increases.
It is preferably provided with by above-mentioned, can further improves heat exchange efficiency, increases the uniformity of heating.By testing hair
It is existing, 10% or so heat exchange efficiency can be improved by above-mentioned setting.
Preferably, electric heater 23 is separately positioned in left pipe box 19 and right pipe box 21 as described in Figure 4, i.e., the first electricity adds
Hot device 231 is arranged in left pipe box 19, and the second electric heater 232 is arranged in right pipe box 21.
Preferably, left pipe box 19 is identical with the length of right pipe box 21.
It is more than the caliber of right pipe box as the caliber of preferred left pipe box.
Preferably, as shown in figure 4, when steam dryer is run, the heating power of the first electric heater 231 is big
In the heating power of the second electric heater 232.By above-mentioned setting, be found through experiments that, enable to hot water in water tank plus
Heat is more uniform.
Preferably, the heating power of the first electric heater 231 is 1.3-1.8 times of the power of the second electric heater 232,
Preferably 1.4-1.65 times.
Found in numerical simulation and corresponding experiment, left pipe box 19, the size of right pipe box 21 and primary heater
Proportionate relationship between 231 and secondary heater 232 can produce influence to the efficiency of heating surface and uniformity.If left pipe box 19
Size difference with right pipe box 21 is too many, and primary heater 231 and the heating power of secondary heater 232 difference are smaller, then
Can produce the efficiency of heating surface it is low and heating there is non-uniform phenomenon, if similarly left pipe box 19, right pipe box 21 size disparity too
Small and primary heater 231 and the heating power of secondary heater 232 difference also occur that the efficiency of heating surface is low and adds than larger
There is non-uniform phenomenon in heat.Therefore the present invention is summarized by substantial amounts of numerical simulation to above-mentioned relation, passes through experiment
Verified.Left pipe box 19, the size of right pipe box 21 and primary heater 231 are obtained and secondary heater 232 are heated
Best relation between power.
Preferably, the internal diameter of left pipe box is D1, the internal diameter of right pipe box is D2, and the power of the electrically heated rod of left pipe box is
G1, the power of the electrically heated rod of right pipe box is G2, meets following relation:
G1/G2=a* (D1/D2)2-b*(D1/D2)+c;
A, b, c are coefficients, wherein the < c < 2.77 of 0.82 < a <, 0.91,1.95 < b < 2.05,2.67;
Wherein 58mm<D1 < 87mm;
29mm < D2 < 68mm;
1.2 < D1/D2 < 2.1;It is preferred that, 1.5 < G1/G2 < 2.3;
It is preferred that;1600W < G1 < 2500W;670W < G2 < 1680W.
Preferably, with D1/D2 increase, a, c increases, b reduces.
Preferably, the quantity of tube bank is 3-5 roots, preferably 3 or 4.
Preferably, a=0.87, b=2, c=2.72.
The distance of left pipe box 19 and the center line of right pipe box 21 is 220-270mm;Preferably 240-250mm.
The radius of tube bank is preferably 10-25mm;
Preferably, in the tube bank adjacent thereto of the circular arc where the tube bank center line of left pipe box center line recently
The distance between circular arc where heart line (such as the distance between center of arc's line in Fig. 4 where tube bank A and B) is two pipes
1.1-2.0 times of beam mean outside diameter (outer dia), preferably preferably 1.2-1.7 times, 1.3-1.5 times.
The weighted average of two pipe diameters of average out to of the diameter of two tube banks.
Preferably, end part aligning of the tube bank in the same side, in approximately the same plane, the extended line of end (or end
The plane at place) by left pipe box 19 center line, as shown in Figure 5.
Further preferably, the electric heater 23 is electrically heated rod.
Electric heater unit of the present invention, as shown in figure 5, the left pipe box 19 is connected with floating coiled pipe A ends;Right pipe box
21 are connected with floating coiled pipe D ends.
Preferably, as shown in figure 5, floating coiled pipe 18 inner side tube bank first end be connected with the first bobbin carriage 19, second
End is restrained one end with adjacent outside and is connected, and one end of the outermost tube bank of floating coiled pipe 18 is connected with the second bobbin carriage 8, adjacent
The end connection of tube bank, so as to form the structure of a series connection.
Plane and the angle c of the plane formation where the first bobbin carriage 19 and the center line of the second bobbin carriage 8 where first end are
40-50 degree.
Plane and the angle b of the plane formation where the first bobbin carriage 19 and the center line of the second bobbin carriage 8 where second end are
25-35 degree.
Pass through the design of above-mentioned preferred angle so that the vibration of free end reaches most preferably, so that the efficiency of heating surface reaches
To optimal.
As shown in figure 5, the tube bank of floating coiled pipe is 4, tube bank A, B, C, D UNICOMs.Certainly, four are not limited to, can be with
It is arranged as required to multiple, specific attachment structure is identical with Fig. 5.
The floating coiled pipe 18 is multiple, and multiple floating coiled pipes 18 independently connect the first bobbin carriage 19 and the second bobbin carriage 8,
I.e. multiple floating coiled pipes 18 are parallel-connection structure.
Although the present invention is disclosed as above with preferred embodiment, the present invention is not limited to this.Any art technology
Personnel, without departing from the spirit and scope of the present invention, can make various changes or modifications, therefore protection scope of the present invention should
It is defined when by claim limited range.