CN109780525B - Control method for pipe diameter of pipe bundle of drying machine - Google Patents
Control method for pipe diameter of pipe bundle of drying machine Download PDFInfo
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- CN109780525B CN109780525B CN201910101763.8A CN201910101763A CN109780525B CN 109780525 B CN109780525 B CN 109780525B CN 201910101763 A CN201910101763 A CN 201910101763A CN 109780525 B CN109780525 B CN 109780525B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
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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
- F22B1/282—Methods of steam generation characterised by form of heating method in boilers heated electrically with water or steam circulating in tubes or ducts
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Abstract
The invention provides a control method of pipe diameter of a pipe bundle of a dryer, the dryer comprises a furnace body, an electric heating device is arranged in the furnace body, the electric heating device comprises a left pipe box, a right pipe box and floating coil pipes, the floating coil pipes are communicated with the left pipe box and the right pipe box, each floating coil pipe comprises a plurality of circular arc-shaped pipe bundles, the central lines of the circular arc-shaped pipe bundles are circular arcs of concentric circles, the end parts of adjacent pipe bundles are communicated, and therefore the end parts of the pipe bundles form free ends of the pipe bundles; the concentric circles are circles taking the center of the left tube box as the center of a circle; the method is characterized in that the pipe diameter of the pipe bundle is controlled by adopting the following method: characterized in that the diameter of the tube bundle becomes larger as it becomes farther from the center of the left tube box. The invention can further improve the heat exchange efficiency and increase the heating uniformity by the arrangement of the change of the pipe diameter.
Description
Technical Field
The invention relates to the technical field of drying, in particular to an intelligently controlled drying machine, and particularly relates to a drying machine capable of drying by utilizing steam.
Background
Steam dryers are mechanical devices that use the heat energy of a fuel or other energy source to heat water into steam. The steam drier has wide application field and is widely applied to places such as clothing factories, dry cleaning shops, restaurants, bunkers, canteens, restaurants, factories and mines, bean product factories and the like. The existing steam dryer is heated by fuel gas or fuel oil mostly, and the heating efficiency and the intelligent degree are not high.
Disclosure of Invention
The invention provides an intelligent control steam drier aiming at the defects in the prior art, and also provides an electric heating steam drier with a novel structure.
In order to achieve the purpose, the invention adopts the following technical scheme:
a steam dryer comprises a furnace body, a water tank and a water pump, wherein the water tank is connected with the water pump through a first pipeline, the water pump is connected with the furnace body through a second pipeline, an electric heating device is arranged in the furnace body, a steam outlet pipeline is arranged at the upper part of the furnace body, and an inlet pipeline is arranged in the water tank; the automatic water pump water level measuring device is characterized in that a water level sensor is arranged in the furnace body, the water level sensor, the electric heater and the water pump are in data connection with a controller, and the controller automatically controls the power of the water pump according to the measured water level in the furnace body.
Preferably, the controller increases the flow rate of water introduced into the furnace body by controlling to increase the power of the water pump if the water level is lowered, and decreases the flow rate of water introduced into the furnace body or stops the supply of water into the furnace body by decreasing the power of the water pump or turning off the power of the water pump if the water level is excessively high.
Preferably, the controller controls the water pump to supply water at a first power when the measured water level is lower than a first water level; when the measured water level is lower than a second water level lower than the first water level, the controller controls the water pump to supply water at a second power higher than the first power; when the measured water level is lower than a third water level lower than the second water level, the controller controls the water pump to supply water at a third power higher than the second power; when the measured water level is lower than a fourth water level lower than the third water level, the controller controls the water pump to supply water at a fourth power higher than the third power; when the measured water level is lower than a fifth water level lower than the fourth water level, the controller controls the water pump to supply water at a fifth power higher than the fourth power.
Preferably, the first water level is 1.1 to 1.3 times the second water level, the second water level is 1.1 to 1.3 times the third water level, the third water level is 1.1 to 1.3 times the fourth water level, and the fourth water level is 1.1 to 1.3 times the fifth water level.
Preferably, the first water level is 1.1 to 1.15 times the second water level, the second water level is 1.15 to 1.2 times the third water level, the third water level is 1.2 to 1.25 times the fourth water level, and the fourth water level is 1.25 to 1.3 times the fifth water level.
Preferably, the fifth power is 1.7-1.9 times the fourth power, the fourth power is 1.6-1.8 times the third power, the third power is 1.5-1.7 times the second power, and the second power is 1.3-1.5 times the first power.
Preferably, a spray pipe is arranged on the wall surface of the furnace body, spray holes are formed in the spray pipe, the second pipeline is connected with the spray pipe, water is fed into the spray pipe through a water pump, and then the water is sprayed out through the spray holes.
Preferably, the electric heating device comprises a left tube box, a right tube box and a floating coil, the floating coil is communicated with the left tube box and the right tube box to form closed circulation of heating fluid, and electric heating rods are arranged in the left tube box and the right tube box; heating fluid is filled in the left tube box, the right tube box and the floating coil; the floating coil pipe is one or more, and every floating coil pipe includes many convex tube bundles, and the central line of many convex tube bundles is the circular arc of concentric circles, and the tip intercommunication of adjacent tube bundle to make the tip of tube bundle form the tube bundle free end.
Preferably, the electric heating device comprises a left tube box, a right tube box and a floating coil, the floating coil is communicated with the left tube box and the right tube box to form closed circulation of heating fluid, and electric heating rods are arranged in the left tube box and the right tube box; heating fluid is filled in the left tube box, the right tube box and the floating coil; the floating coil pipes are one or more, each floating coil pipe comprises a plurality of circular arc-shaped pipe bundles, the central lines of the circular arc-shaped pipe bundles are circular arcs of concentric circles, and the end parts of the adjacent pipe bundles are communicated, so that the end parts of the pipe bundles form free ends of the pipe bundles; the concentric circles are circles with the center of the left tube box as the center of a circle, the inner diameter of the left tube box is D1, the inner diameter of the right tube box is D2, the power of the electric heating rod of the left tube box is G1, the power of the electric heating rod of the right tube box is G2, and the following relations are satisfied:
G1/G2＝a*(D1/D2)2-b*(D1/D2)+c；
a, b and c are coefficients, wherein a is more than 0.82 and less than 0.91, b is more than 1.95 and less than 2.05, and c is more than 2.67 and less than 2.77;
wherein D1 is more than 58mm and less than 87 mm;
29mm＜D2＜68mm；
1.2＜D1/D2＜2.1；
1600W＜G1＜2500W；
670W＜G2＜1680W。
preferably, as D1/D2 increases, a, c increase and b decrease.
The invention has the following advantages:
1. the invention can further improve the heat exchange efficiency and increase the heating uniformity by the arrangement of the change of the pipe diameter. Experiments show that the heat exchange efficiency can be improved by about 10% by the arrangement.
2. The floating coil is applied to heating of the steam dryer, and by the arrangement of the floating coil, volume expansion can be generated after heating fluid is heated, so that the free ends BC and B 'C' of the floating coil are induced to vibrate, and heat transfer is enhanced.
3. The invention optimizes the optimal relation of the parameters of the floating coil through a large number of tests, thereby further improving the heating efficiency.
4. According to the invention, the electric heater is arranged in the pipe box, so that the fluid can be directly prevented from contacting the electric heater, electric shock is avoided, and a protection effect is achieved.
5. According to the invention, the heating efficiency and the heating uniformity are improved by setting the power of the electric heaters of different tube boxes.
Description of the drawings:
fig. 1 is a schematic view of the structure of a steam dryer of the present invention.
Fig. 2 is a schematic view of a control structure of the steam dryer of fig. 1.
Fig. 3 is a cross-sectional view a-a in fig. 1.
Fig. 4 is a cross-sectional view of the electric heating apparatus of fig. 1.
Fig. 5 is a sectional view a-a in fig. 4.
Fig. 6 is a dimensional schematic of the structure of fig. 5.
Fig. 7 is a schematic flow chart of the control of the steam dryer.
In the figure: 1. furnace body, 2 water tanks, 3 water tank inlet pipelines, 4 water pumps, 5 spray pipes, 6 electric heating devices, 7 steam outlet pipelines, 8 controllers, 9 flow sensors, 10 valves, 11 water level sensors, 12 temperature sensors, 13 nozzles, 14 spray pipe inlet pipelines, 15 pipelines, 16 outer shells, 17 pressure sensors, 18 floating coil pipes, 19 left pipe boxes, 20 free ends, 21 right pipe boxes, 22 pipe bundles, 23 electric heaters, 231 first electric heating rods, 232 second electric heating rods
Detailed Description
The drying machine shown in fig. 1 comprises a furnace body 1, a water tank 2 and a water pump 4, wherein the water tank 2 is connected with the water pump 4 through a pipeline 15, the water pump 4 is connected with the furnace body 1 through a pipeline 14, an electric heating device 6 is arranged in the furnace body 1, a steam outlet pipeline 7 is arranged at the upper part of the furnace body 1, and an inlet pipeline 3 is arranged on the water tank 2. The steam outlet pipeline 7 is connected with a steam pipeline, and the materials are dried through the steam pipeline. After being utilized, the steam enters the water tank 2 through the inlet pipeline 3 so as to achieve the purpose of recycling.
The water enters the furnace body 1 from the water tank 3 through the water pump 4, the water is heated in the furnace body 1 through the electric heating device 6, and the generated steam is discharged through the steam outlet pipeline 7.
Preferably, the steam exiting the steam outlet line 7 enters, for example, a steam pipe on which objects to be dried, such as clothes, etc., are placed. Of course, the steam may also enter a drying kiln, such as a steam pipe in a rotary kiln. After being utilized, the steam enters the water tank 2 through the inlet pipeline 3 so as to achieve the purpose of recycling.
Preferably, the inlet line 3 is connected to a tap water pipe through which water is replenished. Preferably, a purifying device is arranged between the tap water pipe and the water tank 2 to purify tap water, so that the heating effect is prevented from being influenced by scaling of an electric heating device in the water tank.
Preferably, the cross section of the furnace body 1 is a circular structure.
Preferably, an outer shell 16 is arranged outside the furnace body 1, and the water tank 4 and the water pump 2 are arranged in the outer shell 16.
Preferably, the electric heating device 6 is provided in plurality. The electric heating device 6 is arranged close to the vertical inner wall surface of the furnace body 1, as shown in figure 1.
Preferably, a nozzle 5 is provided on a wall surface of the furnace body 1, and a nozzle hole 13 is provided on the nozzle 5. The pipe 14 is connected to the nozzle 5, and water is pumped into the nozzle 5 and then sprayed out through the spray holes 13.
Through setting up spray tube and orifice, can make water more even distribution in the motor heater, further promoted the production of steam.
Preferably, as shown in fig. 3, the lance 5 is arranged in a full circle around the vertical inner wall of the furnace. Through so setting up, can be so that spray tube 5 intercommunication on the whole inner wall for can be in the position blowout water of a whole circle of furnace body inner wall behind the water entering spray tube 5, thereby improve the output capacity of steam.
The invention can realize the following control:
temperature control
Preferably, a temperature sensor 12 is arranged in the furnace body 1 and used for measuring the temperature of water in the furnace body 1. The temperature sensor 12 and the electric heating device 6 are in data connection with the controller 8, and the controller 8 automatically controls the heating power of the electric heating device 6 according to the temperature measured by the temperature sensor 12.
Preferably, the controller controls the electric heating device 6 to start heating if the temperature measured by the temperature sensor 12 is lower than a certain temperature. If the temperature measured by the temperature sensor is above a certain temperature, for example above a dangerous critical temperature, the controller controls the electric heating device 6 to stop heating in order to avoid overheating.
Preferably, the controller 8 automatically increases the heating power of the electric heating means 6 if the detected temperature data is lower than a first value, and the controller 8 automatically decreases the heating power of the electric heating means 6 if the measured temperature data is higher than a second value, said second value being higher than the first value.
Preferably, when the measured temperature is lower than the first temperature, the electric heating device 6 starts heating and performs heating at a first power; when the measured temperature is lower than a second temperature lower than the first temperature, the electric heating device 6 heats at a second power higher than the first power; when the measured temperature is lower than a third temperature lower than the second temperature, the electric heating device 6 heats at a third power higher than the second power; when the measured temperature is lower than a fourth temperature lower than the third temperature, the electric heating device 6 heats at a fourth power higher than the third power; when the measured temperature is lower than a fifth temperature lower than the fourth temperature, the electric heating device 6 heats at a fifth power higher than the fourth power.
Preferably, the first temperature is 4-6 ℃ higher than the second temperature, the second temperature is 4-6 ℃ higher than the third temperature, the third temperature is 4-6 ℃ higher than the fourth temperature, and the fourth temperature is 4-6 ℃ higher than the fifth temperature.
Further preferably, the first temperature is 5.5-6 ℃ higher than the second temperature, the second temperature is 5-5.5 ℃ higher than the third temperature, the third temperature is 4.5-5 ℃ higher than the fourth temperature, and the fourth temperature is 4-4.5 ℃ higher than the fifth temperature.
Preferably, the fifth power is 1.1 to 1.3 times the fourth power, the fourth power is 1.1 to 1.3 times the third power, the third power is 1.1 to 1.3 times the second power, and the second power is 1.1 to 1.3 times the first power.
Preferably, the fifth power is 1.1 to 1.15 times the fourth power, the fourth power is 1.15 to 1.2 times the third power, the third power is 1.2 to 1.25 times the second power, and the second power is 1.25 to 1.3 times the first power.
By optimizing the temperature and power, especially by setting the heating power and temperature difference in a differentiated manner, the heating efficiency can be further improved, and the time can be saved. Experiments show that the heating efficiency can be improved by about 10-15%.
Preferably, the temperature sensor 12 is disposed on the bottom wall of the furnace body.
Preferably, the temperature sensor 12 is plural, and the controller controls the operation of the steam dryer according to the temperature data measured by the plural temperature sensors 12.
(II) Water level control
Preferably, a water level sensor 11 is arranged in the furnace body 1, the water level sensor 11, the electric heater 6 and the water pump 4 are in data connection with a controller 8, and the controller 8 automatically controls the power of the water pump 4 according to the measured water level in the furnace body 1.
Preferably, the controller increases the flow rate of water entering the furnace body 1 by controlling the power of the water pump 4 to be increased if the water level is lowered, and decreases the flow rate of water entering the furnace body 1 or stops the supply of water into the furnace body 1 by reducing the power of the water pump 4 or turning off the water pump 4 if the water level is excessively high.
Through foretell setting, avoided on the one hand that the water level crosses the steam output rate that leads to the fact low and electric heater unit's dry combustion method, cause electric heater unit's damage and produce the incident, on the other hand, avoided because the water level is too high and the water yield that leads to the fact is too big to it is low excessively to cause the steam output rate.
Preferably, the controller 8 controls the water pump 4 to supply water at a first power when the measured water level is lower than a first water level; when the measured water level is lower than a second water level lower than the first water level, the controller 8 controls the water pump 4 to supply water at a second power higher than the first power; when the measured water level is lower than a third water level lower than the second water level, the controller 8 controls the water pump 4 to supply water at a third power higher than the second power; when the measured water level is lower than a fourth water level lower than the third water level, the controller 8 controls the water pump 4 to supply water at a fourth power higher than the third power; when the measured water level is lower than a fifth water level lower than the fourth water level, the controller 8 controls the water pump 4 to supply water at a fifth power higher than the fourth power.
Preferably, the first water level is 1.1 to 1.3 times the second water level, the second water level is 1.1 to 1.3 times the third water level, the third water level is 1.1 to 1.3 times the fourth water level, and the fourth water level is 1.1 to 1.3 times the fifth water level.
Preferably, the first water level is 1.1 to 1.15 times the second water level, the second water level is 1.15 to 1.2 times the third water level, the third water level is 1.2 to 1.25 times the fourth water level, and the fourth water level is 1.25 to 1.3 times the fifth water level.
Preferably, the fifth power is 1.7-1.9 times the fourth power, the fourth power is 1.6-1.8 times the third power, the third power is 1.5-1.7 times the second power, and the second power is 1.3-1.5 times the first power.
Through the preferred of above-mentioned water level and water pump power, especially through the settlement of the water level of differentiation and water pump power, can be quick realize the invariant of water level, improve steam output rate, save time. Experiments show that the steam yield can be improved by about 12-16%.
(III) control of heating power according to water level
Preferably, a water level sensor 11 is arranged in the furnace body 1, the water level sensor 11 and the electric heater 6 are in data connection with a controller 8, and the controller 8 automatically controls the heating power of the electric heater according to the measured water level in the furnace body 1.
Preferably, if the water level is too low, the controller controls to reduce the power of the electric heater 6 or directly turn off the heating of the electric heater 6, thereby preventing the water level from being further reduced due to too high steam generation caused by too high heating power, and if the water level is too high, the controller increases the steam generation by increasing the heating power of the electric heater 6, thereby reducing the water level.
Through foretell setting, avoided the water level to hang down the dry combustion method who causes electric heater unit excessively on the one hand, caused electric heater unit's damage and produced the incident, on the other hand, avoided because the water level is too high and the water yield in the furnace body that causes is too big to it is low excessively to cause steam output rate.
Preferably, when the measured water level is lower than the first water level, the controller 8 controls the electric heating device 6 to heat at the first power; when the measured water level is lower than a second water level lower than the first water level, the controller 8 controls the electric heating device 6 to heat at a second power lower than the first power; when the measured water level is lower than a third water level lower than the second water level, the controller 8 controls the electric heating device 6 to heat at a third power lower than the second power; when the measured water level is lower than a fourth water level lower than the third water level, the controller 8 controls the electric heating device 6 to heat at a fourth power lower than the third power; when the measured water level is lower than a fifth water level lower than the fourth water level, the controller 8 controls the electric heating device to heat at a fifth power lower than the fourth power; when the measured water level is lower than a sixth water level lower than the fifth water level, the controller 8 controls the electric heating device to stop heating.
Preferably, the first water level is 1.1 to 1.3 times the second water level, the second water level is 1.1 to 1.3 times the third water level, the third water level is 1.1 to 1.3 times the fourth water level, and the fourth water level is 1.1 to 1.3 times the fifth water level.
Preferably, the first water level is 1.1 to 1.15 times the second water level, the second water level is 1.15 to 1.2 times the third water level, the third water level is 1.2 to 1.25 times the fourth water level, and the fourth water level is 1.25 to 1.3 times the fifth water level.
Preferably, the first power is 1.6 to 1.7 times the second power, the second power is 1.5 to 1.6 times the third power, the third power is 1.4 to 1.5 times the fourth power, and the fourth power is 1.3 to 1.4 times the fifth power.
Through the optimization of the water level and the power of the electric heating device, especially through the setting of the differentiated water level and the power of the electric heating device, the water level can be quickly positioned at a preset safety position, the steam output rate can be ensured when the water level is too high, and the time is saved.
(IV) pressure control
Preferably, a pressure sensor 17 is arranged in the furnace body 1 for measuring the pressure in the furnace body 1. The pressure sensor 17 and the electric heating device 6 are in data connection with the controller 8, and the controller 8 automatically controls the heating power of the electric heating device 6 according to the pressure measured by the pressure sensor.
Preferably, the controller 8 controls the electric heating device 6 to start heating if the pressure measured by the pressure sensor 17 is lower than a certain pressure. If the temperature measured by the pressure sensor is higher than the upper limit pressure, the controller controls the electric heating device 6 to stop heating in order to avoid danger caused by excessive pressure.
Through so setting up, can adjust heating power according to the pressure in the furnace body 1 to guarantee under the condition of maximize steam output, guarantee steam drying machine's safety.
Preferably, the controller 8 controls the electric heating device 6 to increase the heating power if the pressure measured by the pressure sensor 17 is below a certain value. If the temperature measured by the pressure sensor is higher than a certain value, the controller controls the electric heating device 6 to reduce the heating power in order to avoid the danger caused by the excessive pressure.
Preferably, when the measured pressure is higher than the first pressure, the controller 8 controls the heating power of the electric heating device 6 to be reduced to the first power for heating; when the measured pressure is higher than a second pressure higher than the first pressure, the controller 8 controls the heating power of the electric heating device 6 to be reduced to a second power lower than the first power for heating; when the measured pressure is higher than a third pressure higher than the second pressure, the controller 8 controls the heating power of the electric heating device 6 to be reduced to a third power lower than the second power for heating; when the measured pressure is higher than a fourth pressure higher than the third pressure, the controller 8 controls the heating power of the electric heating device 6 to be reduced to a fourth power higher than the third power for heating; when the measured pressure is higher than a fifth pressure higher than the fourth pressure, the controller 8 stops the heating of the electric heating device 6.
Preferably, the fourth power is 0.4 to 0.6 times the third power, the third power is 0.6 to 0.8 times the second power, and the second power is 0.7 to 0.9 times the first power.
Further preferably, the fourth power is 0.5 times the third power, the third power is 0.7 times the second power, and the second power is 0.8 times the first power.
The fifth pressure is the upper limit pressure.
The pressure sensor 17 is arranged at the upper position of the furnace body.
Preferably, the pressure sensor 17 is plural, and the controller controls the operation of the steam dryer according to the pressure data which is the temperature measured by the plural pressure sensors 17.
(V) steam flow control
Preferably, a flow sensor 9 is arranged on the steam outlet pipeline 7 and used for measuring the steam flow generated in unit time, and the flow sensor 9 and the electric heater 6 are in data connection with a controller 8. The controller 8 automatically controls the power of the electric heater according to the measured steam flow.
Preferably, the controller 8 controls the electric heating device 6 to increase the heating power if the measured steam flow is below a certain value. If the temperature measured by the pressure sensor is higher than a certain value, the controller controls the electric heating device 6 to reduce the heating power.
Through so setting up, can adjust heating power according to the steam quantity that steam drying machine produced, guarantee the invariant of steam output quantity, avoid the quantity too big or undersize, cause steam quantity not enough or extravagant.
Preferably, when the measured flow rate is higher than the first flow rate, the controller 8 controls the heating power of the electric heating device 6 to be reduced to the first power for heating; when the measured flow is higher than a second flow higher than the first flow, the controller 8 controls the heating power of the electric heating device 6 to be reduced to a second power lower than the first power for heating; when the measured flow rate is higher than a third flow rate higher than the second flow rate, the controller 8 controls the heating power of the electric heating device 6 to be reduced to a third power lower than the second power for heating; when the measured flow is higher than a fourth flow higher than the third flow, the controller 8 controls the heating power of the electric heating device 6 to be reduced to a fourth power higher than the third power for heating; when the measured flow rate is higher than the fifth flow rate, which is higher than the fourth flow rate, the controller 8 stops the heating of the electric heating device 6.
Preferably, the fourth power is 0.4 to 0.6 times the third power, the third power is 0.6 to 0.8 times the second power, and the second power is 0.7 to 0.9 times the first power.
Further preferably, the fourth power is 0.5 times the third power, the third power is 0.7 times the second power, and the second power is 0.8 times the first power.
Further preferably, the fifth flow rate is 1.1 to 1.2 times the fourth flow rate, the fourth flow rate is 1.2 to 1.3 times the third flow rate, the third flow rate is 1.3 to 1.4 times the second flow rate, and the second flow rate is 1.4 to 1.5 times the first flow rate.
By optimizing the flow rate and the power of the electric heating device, especially by setting the flow rate and the power of the electric heating device in a differentiated manner, the flow rate can be quickly kept constant, and time can be saved.
Another object of the present invention is to provide a new electric heating device, particularly suitable for steam dryers.
Fig. 4 shows a schematic cross-sectional view of the electric heating device 6, wherein the electric heating device 6 comprises a left tube box 19, a right tube box 21 and a floating coil 18, the floating coil 18 is communicated with the left tube box 19 and the right tube box 21, a heating fluid is circulated in the left tube box 19, the right tube box 21 and the floating coil in a closed manner, an electric heater 23 is arranged in the electric heating device 6, and the electric heater 23 is used for heating the fluid in the electric heating device 6 and then heating the water in the water tank by the heated fluid.
Preferably, the electric heating device 6 is provided in the left or right header 19, 21.
The floating coils 18 are in one or more groups, each group of floating coils 18 comprising a plurality of circular arc-shaped tube bundles 22, the center lines of the plurality of circular arc-shaped tube bundles 22 being circular arcs of concentric circles, the ends of adjacent tube bundles 22 communicating such that the ends of the coils 18 form a free end 20 of the tube bundle, such as the free end 20 in fig. 5.
Preferably, the electric heating device is vacuumized and then filled with heating fluid.
Preferably, the heating fluid is ammonia, methanol or ethanol.
Preferably, the heating fluid is one of cesium and rubidium.
The traditional floating coil pipe utilizes the impact of the flowing fluid to carry out vibration descaling action to carry out enhanced heat transfer, and is used for forced convection heat transfer, and the water in the steam dryer has poor fluidity and cannot carry out forced convection heat transfer flowing.
In the present invention, since the electric heater 23 is disposed in the header 19, 21, it is possible to directly avoid the contact between the fluid and the electric heater, thereby preventing electric shock and protecting the electric heater.
Preferably, the left tube box 19, the right tube box 21, and the floating coil 18 are all of a circular tube structure.
Preferably, the tube bundle of floating coils 18 is an elastic tube bundle.
The heat transfer coefficient can be further improved by providing the tube bundle of floating coil 18 with an elastic tube bundle.
Preferably, the concentric circles are circles centered on the center of the left tube box 19. I.e. the tube bundle 22 of floating coils 18, is arranged around the centre line of the left header 19.
As shown in fig. 5, the tube bundle 22 is not a complete circle, but rather leaves a mouth, thereby forming the free end of the tube bundle. The angle of the arc of the mouth part is 65-85 degrees, namely the sum of included angles b and c in figure 6 is 65-85 degrees.
Preferably, the pipe diameter of the left pipe box 19 is larger than that of the right pipe box 21.
Through the arrangement, the heat transfer can be further enhanced, and the heat exchange efficiency is improved by 8-15%.
Preferably, the inner diameter of the left tube box is D1, and the inner diameter of the right tube box is D2, so that 1.5 < D1/D2 < 2.5.
Through the preferred setting, can make heat exchange efficiency reach the best.
Preferably, the distance between adjacent tube bundles becomes larger as the distance from the center of the left tube box 19 becomes larger.
Preferably, the distance between adjacent tube bundles is increased to a greater and greater extent.
Through the preferable arrangement, the heat exchange efficiency can be further improved, and the heating uniformity is increased. Experiments show that the heat exchange efficiency can be improved by 10-11% by the arrangement.
Preferably, the tube bundle has a larger diameter as it is farther from the center of the left tube box 19.
Preferably, the diameter of the tube bundle is increased to a greater and greater extent.
Through the preferable arrangement, the heat exchange efficiency can be further improved, and the heating uniformity is increased. Experiments show that the heat exchange efficiency can be improved by about 10% by the arrangement.
Preferably, as shown in fig. 4, the electric heaters 23 are respectively disposed in the left and right headers 19 and 21, that is, the first electric heater 231 is disposed in the left header 19 and the second electric heater 232 is disposed in the right header 21.
Preferably, the left and right headers 19 and 21 have the same length.
The pipe diameter of the left pipe box is preferably larger than that of the right pipe box.
Preferably, as shown in fig. 4, the heating power of the first electric heater 231 is greater than the heating power of the second electric heater 232 while the steam dryer is in operation. Through the setting, through experimental discovery, can make the hot-water heating more even in the water tank.
Preferably, the heating power of the first electric heater 231 is 1.3 to 1.8 times, preferably 1.4 to 1.65 times, the power of the second electric heater 232.
In numerical simulations and corresponding experiments, it was found that the dimensions of the left and right headers 19, 21 and the proportional relationship between the first and second heaters 231, 232 can have an effect on the heating efficiency and uniformity. If the difference between the sizes of the left and right headers 19 and 21 is too large and the difference between the heating powers of the first and second heaters 231 and 232 is relatively small, the heating efficiency is low and the heating is not uniform, and similarly, if the difference between the sizes of the left and right headers 19 and 21 is too small and the difference between the heating powers of the first and second heaters 231 and 232 is relatively large, the heating efficiency is low and the heating is not uniform. Therefore, the invention summarizes the relationship through a large number of numerical simulations, and verifies the relationship through experiments. An optimum relationship between the sizes of the left and right headers 19 and 21 and the heating powers of the first and second heaters 231 and 232 is obtained.
Preferably, the inner diameter of the left tube box is D1, the inner diameter of the right tube box is D2, the power of the electric heating rod of the left tube box is G1, and the power of the electric heating rod of the right tube box is G2, and the following relationships are satisfied:
G1/G2＝a*(D1/D2)2-b*(D1/D2)+c；
a, b and c are coefficients, wherein a is more than 0.82 and less than 0.91, b is more than 1.95 and less than 2.05, and c is more than 2.67 and less than 2.77;
wherein D1 is more than 58mm and less than 87 mm;
29mm＜D2＜68mm；
D1/D2 is more than 1.2 and less than 2.1; preferably, 1.5 < G1/G2 < 2.3;
preferably; 1600W < G1 < 2500W; 670W < G2 < 1680W.
Preferably, as D1/D2 increases, a, c increase and b decrease.
Preferably, the number of bundles is 3-5, preferably 3 or 4.
Preferably, a is 0.87, b is 2, and c is 2.72.
The distance between the central lines of the left channel box 19 and the right channel box 21 is 220 mm and 270 mm; preferably 240 and 250 mm.
The radius of the tube bundle is preferably 10-25 mm;
preferably, the distance between the arc on which the center line of the tube bundle closest to the center line of the left tube cassette is located and the arc on which the center line of the tube bundle adjacent thereto is located (e.g., the distance between the center lines of the arcs on which the tube bundles a and B are located in fig. 4) is 1.1 to 2.0 times, preferably 1.2 to 1.7 times, and preferably 1.3 to 1.5 times the average outer diameter (outer diameter) of the two tube bundles.
The average of the diameters of the two tube bundles is the weighted average of the diameters of the two tubes.
Preferably, the ends of the tube bundle on the same side are aligned in the same plane, with the extension of the ends (or the plane in which the ends lie) passing through the midline of the left tube box 19, as shown in FIG. 5.
Further preferably, the electric heater 23 is an electric heating rod.
In the electric heating device of the present invention, as shown in fig. 5, the left channel box 19 is communicated with the end a of the floating coil pipe; the right tube box 21 is communicated with the end D of the floating coil.
Preferably, as shown in fig. 5, the first end of the inner tube bundle of the floating coil 18 is connected to the first header 19, the second end is connected to one end of the adjacent outer tube bundle, one end of the outermost tube bundle of the floating coil 18 is connected to the second header 8, and the ends of the adjacent tube bundles are connected to each other, thereby forming a serial structure.
The plane in which the first end is located forms an angle c of 40-50 degrees with the plane in which the centre lines of the first and second headers 19, 8 are located.
The plane of the second end forms an angle b of 25-35 degrees with the plane of the centre lines of the first and second headers 19, 8.
Through the design of the preferable included angle, the vibration of the free end is optimal, and therefore the heating efficiency is optimal.
As shown in fig. 5, there are 4 tube bundles of floating coil, tube bundle A, B, C, D in communication. Of course, the number is not limited to four, and a plurality of the connecting structures are provided as required, and the specific connecting structure is the same as that in fig. 5.
The floating coil pipes 18 are multiple, the floating coil pipes 18 are respectively and independently connected with the first pipe box 19 and the second pipe box 8, that is, the floating coil pipes 18 are in a parallel structure.
Although the present invention has been described with reference to the preferred embodiments, it is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (2)
1. A control method of pipe diameters of pipe bundles of a dryer is disclosed, wherein the dryer comprises a furnace body, a water tank and a water pump, an electric heating device is arranged in the furnace body, the electric heating device comprises a left pipe box, a right pipe box and floating coil pipes, the floating coil pipes are communicated with the left pipe box and the right pipe box, each floating coil pipe comprises a plurality of circular arc-shaped pipe bundles, the central lines of the circular arc-shaped pipe bundles are circular arcs of concentric circles, and the end parts of adjacent pipe bundles are communicated, so that the end parts of the pipe bundles form free ends of the pipe bundles; the concentric circles are circles taking the center of the left tube box as the center of a circle; the method is characterized in that the pipe diameter of the pipe bundle is controlled by adopting the following method: the diameter of the tube bundle becomes larger and larger as the distance from the center of the left tube box becomes farther;
the water tank is connected with a water pump through a first pipeline, the water pump is connected with the furnace body through a second pipeline, an electric heating device is arranged in the furnace body, a steam outlet pipeline is arranged at the upper part of the furnace body, and an inlet pipeline is arranged in the water tank; the steam outlet pipeline is connected with a steam pipeline, and the materials are dried through the steam pipeline; after the steam is utilized, the steam enters the water tank through the inlet pipeline.
2. The control method of claim 1, wherein the tube bundle increases in diameter with increasing distance from the center of the left tube box.
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| CN201910101763.8A CN109780525B (en) | 2016-08-31 | 2016-08-31 | Control method for pipe diameter of pipe bundle of drying machine |
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| CN201910101763.8A CN109780525B (en) | 2016-08-31 | 2016-08-31 | Control method for pipe diameter of pipe bundle of drying machine |
| CN201610788376.2A CN107356097B (en) | 2016-08-31 | 2016-08-31 | A kind of steam dryer of intelligent temperature control |
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| CN108709175A (en) * | 2018-04-24 | 2018-10-26 | 青岛中正周和科技发展有限公司 | A kind of cloud processing solar steam generator of intelligent control vapor (steam) temperature |
| CN108591982A (en) * | 2018-04-24 | 2018-09-28 | 青岛中正周和科技发展有限公司 | A kind of solar steam generator of long-range vapor (steam) temperature control valve |
| CN109489024B (en) * | 2018-06-27 | 2020-04-07 | 青岛鑫众合贸易有限公司 | Evaporator system for heating liquid medicine |
| CN112944678B (en) * | 2019-07-03 | 2022-06-14 | 无锡职业技术学院 | Water heater of high heating is in coordination in field |
| CN113446585A (en) * | 2020-07-27 | 2021-09-28 | 无锡职业技术学院 | Water level intelligent communication control heating power's steam boiler |
| CN114001340A (en) * | 2020-07-27 | 2022-02-01 | 无锡职业技术学院 | Steam boiler with steam flow intelligent communication control function |
| CN114001341A (en) * | 2020-07-27 | 2022-02-01 | 无锡职业技术学院 | Steam boiler of intelligent communication temperature control |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259941A (en) * | 2011-06-16 | 2011-11-30 | 大连理工大学 | Vertical tube seawater spewing and boiling evaporator |
| CN103717968A (en) * | 2011-07-25 | 2014-04-09 | 道达尔公司 | Steam generation |
| CN204593329U (en) * | 2015-03-13 | 2015-08-26 | 江应伦 | A kind of non-Boiler High Pressure steam producing apparatus |
| CN105485651A (en) * | 2015-12-16 | 2016-04-13 | 宁波亿道节能环保科技有限公司 | Waste heat pressurized circulation device for steam generator |
| CN106196623A (en) * | 2016-07-25 | 2016-12-07 | 冯大成 | A kind of electric heater utilizing mobile phone A PP to carry out pressure monitor |
| CN106595357A (en) * | 2016-08-20 | 2017-04-26 | 杨丙 | Coiled tube submerged type heat exchange assembly |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2563099B2 (en) * | 1992-05-04 | 1996-12-11 | シーメンス アクチエンゲゼルシヤフト | Forced once-through steam generator |
| US20110300050A1 (en) * | 2010-06-08 | 2011-12-08 | Memc Electronic Materials, Inc. | Trichlorosilane Vaporization System |
| CN201720254U (en) * | 2010-08-12 | 2011-01-26 | 宝钢工程技术集团有限公司 | Circulating heating device for steam heater |
| CN203940403U (en) * | 2014-07-08 | 2014-11-12 | 卢秋全 | A kind of steam generator |
| CN205299449U (en) * | 2015-12-25 | 2016-06-08 | 北京金燃永兴节能环保厨房设备有限公司 | Multi -purpose steam generator |
| CN105570868B (en) * | 2016-02-04 | 2017-11-10 | 苏州汉策能源设备有限公司 | A kind of gas fired-boiler combustion conditions real-time monitoring system |
| CN205402656U (en) * | 2016-02-19 | 2016-07-27 | 湖南汽车工程职业学院 | Based on PLC and FCS boiler soda control system |
| CN105716062B (en) * | 2016-02-26 | 2018-02-16 | 西北大学 | A kind of quantitative makes the steam generator and application method of mouthful quantity of steam |
-
2016
- 2016-08-31 CN CN201610788376.2A patent/CN107356097B/en active Active
- 2016-08-31 CN CN201910101763.8A patent/CN109780525B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259941A (en) * | 2011-06-16 | 2011-11-30 | 大连理工大学 | Vertical tube seawater spewing and boiling evaporator |
| CN103717968A (en) * | 2011-07-25 | 2014-04-09 | 道达尔公司 | Steam generation |
| CN204593329U (en) * | 2015-03-13 | 2015-08-26 | 江应伦 | A kind of non-Boiler High Pressure steam producing apparatus |
| CN105485651A (en) * | 2015-12-16 | 2016-04-13 | 宁波亿道节能环保科技有限公司 | Waste heat pressurized circulation device for steam generator |
| CN106196623A (en) * | 2016-07-25 | 2016-12-07 | 冯大成 | A kind of electric heater utilizing mobile phone A PP to carry out pressure monitor |
| CN106595357A (en) * | 2016-08-20 | 2017-04-26 | 杨丙 | Coiled tube submerged type heat exchange assembly |
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| CN107356097B (en) | 2019-02-22 |
| CN107356097A (en) | 2017-11-17 |
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