CN112254548A - Method and device for preventing icing of air inlet of cooling tower based on ultrasonic waves - Google Patents
Method and device for preventing icing of air inlet of cooling tower based on ultrasonic waves Download PDFInfo
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- CN112254548A CN112254548A CN202011116852.9A CN202011116852A CN112254548A CN 112254548 A CN112254548 A CN 112254548A CN 202011116852 A CN202011116852 A CN 202011116852A CN 112254548 A CN112254548 A CN 112254548A
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- air inlet
- cooling tower
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
- F28C1/12—Arrangements for preventing clogging by frost
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F25/10—Component parts of trickle coolers for feeding gas or vapour
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/003—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus specially adapted for cooling towers
Abstract
The embodiment of the invention provides a method and a device for preventing an air inlet of a cooling tower from being frozen based on ultrasonic waves, wherein the method comprises the following steps: collecting the water accumulation of the air inlet; and when the water accumulation amount reaches a first preset threshold value, controlling the ultrasonic generator to emit ultrasonic waves with a first frequency. According to the method provided by the embodiment of the invention, the water accumulation amount of the air inlet of the cooling tower can be reduced, so that the icing of the air inlet of the cooling tower is effectively prevented, and the heat exchange efficiency of the cooling tower is ensured.
Description
Technical Field
The invention belongs to the field of anti-icing and deicing, and particularly relates to a method and a device for preventing an air inlet of a cooling tower from icing based on ultrasonic waves.
Background
At present, the cooling tower is widely applied in various industries, and people utilize the cooling tower to cool various equipment so as to ensure the normal operation of the various equipment.
People usually utilize heat generated by water absorption equipment, in a cooling tower, flowing air is directly or indirectly contacted with water, the water is subjected to heat exchange after being contacted with the flowing air to generate water vapor, and the water vapor is volatilized to take away the heat and then is discharged into the atmosphere.
For northern areas in winter, the air temperature outside the cooling tower is low, so that part of cooling water or water in the air is accumulated at the air inlet to form a large amount of accumulated ice, the air inlet volume of the cooling tower is seriously influenced, and the heat exchange efficiency of the cooling tower is reduced.
Disclosure of Invention
The embodiment of the invention provides a method and a device for preventing an air inlet of a cooling tower from being frozen based on ultrasonic waves, which can prevent the air inlet of the cooling tower from being frozen and ensure the heat exchange efficiency of the cooling tower.
In a first aspect, an embodiment of the present invention provides a method for preventing an air inlet of a cooling tower from being frozen based on ultrasonic waves, where the method includes:
collecting the water accumulation of the air inlet;
when the water accumulation amount reaches a first preset threshold value, the ultrasonic generator is controlled to emit ultrasonic waves with a first frequency.
In one possible implementation, after controlling the ultrasonic generator to emit the ultrasonic wave at the first frequency, the method further includes:
when the water accumulation amount reaches a second preset threshold value, collecting the temperature of return water, wherein the return water is water cooled in the cooling tower;
and when the temperature of the return water reaches a first preset temperature, controlling the ultrasonic wave to emit ultrasonic wave of a second frequency.
In one possible implementation, after controlling the ultrasonic wave to emit the ultrasonic wave at the second frequency, the method further includes:
and when the temperature of the return water is lower than a second preset temperature, controlling the ultrasonic generator to emit ultrasonic waves with a first frequency.
In one possible implementation, after controlling the ultrasonic generator to emit the ultrasonic wave at the first frequency, the method further includes:
and when the water accumulation amount is lower than the second preset threshold value, closing the ultrasonic generator.
In one possible implementation, after controlling the ultrasonic generator to emit the ultrasonic wave at the first frequency, the method further includes:
and when the water accumulation amount is lower than the second preset threshold value, closing the ultrasonic generator.
In a second aspect, an embodiment of the present invention provides an apparatus for preventing an air inlet of a cooling tower from being frozen based on ultrasonic waves, where the apparatus includes:
the first collecting module is used for collecting the water accumulation of the air inlet;
and the control module is used for controlling the ultrasonic generator to send out ultrasonic waves with first frequency when the accumulated water amount reaches a first preset threshold value.
In one possible implementation, the apparatus further includes:
the second acquisition module is used for acquiring the temperature of return water when the water accumulation amount reaches a second preset threshold value, wherein the return water is water cooled in the cooling tower;
the control module is also used for controlling the ultrasonic generator to send out ultrasonic waves with second frequency when the temperature of the return water reaches a first preset temperature; and when the temperature of the return water is lower than a second preset temperature, closing the ultrasonic generator.
In one possible implementation, the control module is further configured to:
and when the water accumulation amount is lower than a second preset threshold value, the ultrasonic generator is closed.
In a third aspect, an embodiment of the present invention provides an apparatus for preventing an air inlet of a cooling tower from being frozen based on ultrasonic waves, where the apparatus includes: a processor, and a memory storing computer program instructions;
the processor reads and executes the computer program instructions to implement the method as in the first aspect or any possible implementation of the first aspect.
In a fourth aspect, an embodiment of the present invention provides a computer storage medium having stored thereon computer program instructions that, when executed by a processor, implement a method as in the first aspect or any possible implementation manner of the first aspect.
According to the method, the device, the equipment and the computer storage medium for preventing the cooling tower air inlet from being frozen based on the ultrasonic waves, the water accumulation amount of the cooling tower air inlet can be reduced through the ultrasonic waves with the first frequency, the ice accumulation of the cooling tower air inlet is melted through the ultrasonic waves with the second frequency, the cooling tower air inlet can be prevented from being frozen, the ice accumulation of the cooling tower air inlet is further prevented from influencing the air inlet amount, and therefore the heat exchange efficiency of the cooling tower is guaranteed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart of a method for preventing an air inlet of a cooling tower from being frozen based on ultrasonic waves according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a collection line for collecting water accumulation according to an embodiment of the present invention;
FIG. 3 is a flow chart of another method for preventing icing at an air inlet of a cooling tower based on ultrasonic waves according to an embodiment of the present invention;
FIG. 4 is a flow chart of another method for preventing icing at an air inlet of a cooling tower based on ultrasonic waves according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an ultrasonic-based device for preventing icing at an air inlet of a cooling tower according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of an ultrasonic-based device for preventing icing at an air inlet of a cooling tower according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of an ultrasonic-based device for preventing icing at an air inlet of a cooling tower according to an embodiment of the present invention;
fig. 8 is a schematic diagram of an ultrasonic generator provided in an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
At present, the cooling tower is widely applied in various industries, and people utilize the cooling tower to cool various equipment so as to ensure the normal operation of the various equipment.
People often utilize water to absorb heat generated by the equipment. In the cooling tower, flowing air is directly or indirectly contacted with water, the water is in heat exchange with the flowing air to generate water vapor, the water vapor volatilizes and takes away heat, and the water vapor is discharged to the atmosphere through an air outlet of the cooling tower, so that the heat dissipation of equipment is realized.
In northern areas in winter, the air outside the cooling tower is low in temperature, so that part of cooling water or water vapor in the air is accumulated at the air inlet to form a large amount of accumulated ice. When the air inlet is seriously frozen, the air inlet quantity of the cooling tower can be seriously influenced, and the heat exchange efficiency of the cooling tower is reduced.
Based on the above problems, embodiments of the present invention provide a method, an apparatus, a device, and a computer storage medium for preventing icing at an air inlet of a cooling tower based on ultrasonic waves, which can reduce an amount of accumulated water at the air inlet of the cooling tower by using ultrasonic waves of a first frequency, and melt the accumulated ice at the air inlet of the cooling tower by using ultrasonic waves of a second frequency, thereby preventing the icing at the air inlet of the cooling tower, preventing the accumulated ice at the air inlet of the cooling tower from affecting an air inlet amount, and ensuring heat exchange efficiency in the cooling tower.
Fig. 1 shows a flowchart of a method for preventing icing at an air inlet of a cooling tower based on ultrasonic waves according to an embodiment of the present invention. As shown in fig. 1, the method may include the steps of:
and 110, collecting the accumulated water quantity of the air inlet.
The cooling water in the cooling tower is easy to drop at the air inlet of the cooling tower to form accumulated water, and when the temperature outside the cooling tower is lower, the accumulated water at the air inlet is easy to freeze, so that the air intake is influenced. The water accumulation amount of the air inlet is collected by arranging a collection line at the air inlet, and the collected water accumulation amount information is sent to the controller, so that the controller controls the ultrasonic generator to remove water.
The principle of collecting the water accumulation by the collection line is shown in fig. 2-a and fig. 2-b. As shown in fig. 2-a, the collection line includes two sensing wires, one continuous wire and one signal wire. In one example, the collection line may be a 6mm (0.24in) wire. When water drops fall on the two induction wires, as shown in fig. 2-b, the two induction wires are in short circuit, so that current changes occur, and the current changes of the acquisition wires carry the accumulated water amount information acquired by the acquisition wires.
In one embodiment of the invention, a plurality of collecting lines are distributed at the air inlet of the cooling tower, and when the collecting lines contact accumulated water, the collecting lines contacting the accumulated water are in short circuit connection to generate current change. And when the controller receives the current change, calculating the proportion of the number of the acquisition lines with the current change in the total number of the distributed acquisition lines, and controlling the ultrasonic generator according to the proportion.
When the ratio reaches a preset threshold value, the ultrasonic generator is controlled to emit ultrasonic waves with a first frequency, the temperature of the accumulated water is increased, and the accumulated water is vibrated to drip the accumulated water.
And 120, judging whether the water accumulation amount reaches a first preset threshold value.
The first preset threshold is a threshold preset according to actual conditions, and step 130 is executed when the water accumulation amount reaches the first preset threshold.
And 130, controlling the ultrasonic generator to emit the ultrasonic wave of the first frequency.
The ultrasonic wave of first frequency is the ultrasonic wave of preset frequency, and the ultrasonic wave of first frequency can produce thermal effect and mechanical effect on the ponding of air intake. The heat effect can improve the temperature of the accumulated water and prolong the icing time of the accumulated water, the mechanical effect can lead the accumulated water to vibrate, the accumulated water can drip from the air inlet, and the icing probability of the air inlet is reduced.
The principle of ice protection by the thermal effect of ultrasound is explained in detail below. The medium absorbs sound energy and then is converted into heat energy according to the formula:
in the formula, alphaaIs the acoustic absorption coefficient, which is a function of the acoustic frequency f, and can be approximated as: alpha is alphaa＝0.26f1.1(cm-1) F is in MHz; t is temperature in units of; t is time in units of s; i is the ultrasonic intensity at the measured position and has the unit of W/cm2；ρ0Is the average density of the medium and has the unit of g/cm3；CpThe specific heat capacity of the measured medium under a certain pressure is expressed in J/g ℃.
If the medium is water, the average density rho of the medium0＝1.00g/cm3Taking out CpThe specific heat capacity of water is 4.18J/g ℃, and the generated heat is not dissipated, so the temperature rise of the medium after t seconds of irradiation is as follows:
ΔT＝(2×0.026/ρ0Cp)Itf1.1＝0.012Itf1.1(℃)
wherein if f is 1MHz, t is 1s, and I is 3000W/cm2Then, Δ T may be obtained as 36 ℃. According to the calculation, the selected medium passes through 3000W/cm2After the ultrasonic wave acts for 1 second, the temperature rise of the medium can reach 36 ℃, and the probability of accumulated water forming ice can be reduced.
According to the method for preventing the freezing of the air inlet of the cooling tower based on the ultrasonic waves, provided by the embodiment of the invention, the water accumulation amount of the air inlet of the cooling tower can be collected through the collection line, the controller controls the ultrasonic generator to send the ultrasonic waves with the first frequency according to the water accumulation amount, the water accumulation of the air inlet is removed by utilizing the thermal effect and the mechanical effect of the ultrasonic waves, the freezing of the air inlet is prevented, and therefore the heat exchange efficiency in the cooling tower is ensured.
In one embodiment of the present invention, the first preset threshold may include a plurality of thresholds, the first frequency may include a plurality of frequencies, each threshold has a frequency corresponding to the threshold, the frequency corresponding to the threshold is higher if the threshold is larger, and the controller controls the frequency emitted by the ultrasonic generator according to the threshold reached by the accumulated water amount. And when the water accumulation amount reaches any one of the first preset thresholds, controlling the ultrasonic generator to emit ultrasonic waves with the frequency corresponding to the threshold.
According to the embodiment of the invention, the ultrasonic generator is controlled to emit corresponding frequency according to different threshold values of the water accumulation amount, the accumulated water in the air inlet is removed, the electric energy can be saved, the loss of the device for preventing the air inlet of the cooling tower from being frozen based on the ultrasonic wave is reduced, and the service life of the device is prolonged.
The method for preventing the air inlet of the cooling tower from being frozen based on the ultrasonic wave is explained above, and the other method for preventing the air inlet of the cooling tower from being frozen based on the ultrasonic wave is explained below by combining with fig. 3.
As shown in fig. 3, the method, after the water volume collected by the collection line reaches the first preset threshold, includes the following steps:
the ultrasonic generator is controlled to emit ultrasonic waves at a first frequency 310.
At the moment, the accumulated water amount of the air inlet reaches a first threshold value, the accumulated water is possibly frozen, and the ultrasonic generator sends ultrasonic waves with a first frequency to reduce the accumulated water amount of the air inlet and prevent the ice accumulation at the air inlet.
And 320, judging whether the water accumulation amount reaches a second preset threshold value.
The second preset threshold is a threshold preset according to actual conditions, and the first preset threshold and the second preset threshold may be the same or different. The ultrasonic generator sends out ultrasonic waves of the first frequency, the controller judges whether the water accumulation amount reaches a second preset threshold value, when the water accumulation amount reaches the second preset threshold value, the accumulated water of the air inlet possibly forms accumulated ice, at the moment, the ultrasonic waves of the first frequency possibly cannot remove the water inlet or the accumulated ice of the air inlet in time, and step 330 is executed.
And 330, collecting the temperature of the return water.
When the air inlet generates accumulated ice, the more the accumulated ice is, the larger the obstruction to the air inlet is, the heat exchange efficiency in the cooling tower is reduced when the air inlet amount is reduced, the return water temperature of the cooling water is reduced, the return water temperature can be collected through the temperature sensor, and the collected temperature information is sent to the controller.
340, judging whether the return water temperature reaches a first preset temperature.
When the temperature of the return water reaches a first preset temperature, indicating that the ice deposition of the air inlet affects the heat exchange efficiency in the cooling tower, and executing a step 350; and when the return water temperature does not reach the first preset temperature, continuing to judge according to the collected return water temperature.
And 350, controlling the ultrasonic generator to emit ultrasonic waves of a second frequency.
The frequency of the ultrasonic wave of the second frequency is greater than the frequency of the ultrasonic wave of the first frequency, and can be obtained according to the ultrasonic wave thermal effect principle explained above, and when the frequency of the ultrasonic wave is increased, the temperature rise generated in the medium in the same time is larger, so that the frequency of the ultrasonic wave of the second frequency can be set according to requirements, the accumulated ice is heated, the accumulated ice is melted, and meanwhile, the accumulated water is removed.
And 360, judging whether the return water temperature reaches a second preset temperature.
The first preset temperature is a temperature value preset according to an actual situation, when the temperature of the return water reaches the second preset temperature, it indicates that the ice accretion in the air inlet has been removed, the ultrasonic wave of the second frequency may be stopped, and step 310 is executed.
The ultrasonic generator is controlled to emit ultrasonic waves at a first frequency 310.
The water accumulation amount of the air inlet is reduced by utilizing the ultrasonic wave with the first frequency, and the air inlet is prevented from being frozen.
And 370, judging whether the water accumulation amount reaches a second threshold value.
When the water accumulation amount does not reach the second preset threshold, that is, the water accumulation amount is lower than the second preset threshold, step 370 is executed.
370, the ultrasonic generator is turned off.
When the water accumulation amount is lower than a second preset threshold value, the water accumulation in the air inlet is removed, and therefore the ultrasonic generator can be closed.
According to the method for preventing the icing of the air inlet of the cooling tower based on the ultrasonic waves, provided by the embodiment of the invention, when the water accumulation amount of the air inlet of the cooling tower reaches the first threshold value, the controller controls the ultrasonic generator to send the ultrasonic waves with the first frequency so as to remove the accumulated water, and judges whether the water accumulation amount reaches the second threshold value. When the water accumulation amount reaches the second threshold value, the accumulated ice is possibly generated at the air inlet, the air inlet amount is influenced, and the heat exchange efficiency in the cooling tower is reduced.
And when the water accumulation amount reaches a second threshold value, collecting the temperature of the return water. When the return water temperature reaches a first threshold value, indicating that the ice accretion is generated at the air inlet, controlling the ultrasonic generator to send ultrasonic waves of a second frequency by the controller, melting the ice accretion at the air inlet by using the heat effect of the ultrasonic waves of the second frequency, removing the accumulated water, and collecting the return water temperature.
When the return water temperature reaches a second preset threshold value, the accumulated ice at the air inlet is melted, the heat exchange efficiency in the cooling tower is recovered to be normal, and the return water temperature is also recovered to be normal. The controller controls the ultrasonic generator to emit ultrasonic waves with the first frequency so as to remove accumulated water in the air inlet and prevent the accumulated ice from being generated in the air inlet, thereby ensuring the heat exchange efficiency in the cooling tower.
The method for preventing the air inlet of the cooling tower from being frozen based on the ultrasonic wave is explained above, and the other method for preventing the air inlet of the cooling tower from being frozen based on the ultrasonic wave is explained below by combining with fig. 4.
As shown in fig. 4, the method includes the following steps after the water accumulation amount collected by the collection line at the air inlet reaches a first preset threshold value:
and 410, controlling the ultrasonic generator to emit ultrasonic waves of a first frequency.
At the moment, the accumulated water amount of the air inlet reaches a first threshold value, the accumulated water is possibly frozen, and the ultrasonic generator sends ultrasonic waves with a first frequency to reduce the accumulated water amount of the air inlet and prevent the ice accumulation at the air inlet.
And 420, judging whether the water accumulation amount reaches a second threshold value.
When the accumulated water amount reaches a second preset threshold value, the accumulated water in the air inlet is not removed, the accumulated water is continuously removed through the ultrasonic wave with the first frequency, and meanwhile, whether the accumulated water amount reaches the second preset threshold value is judged.
When the water accumulation amount does not reach the second preset threshold, that is, the water accumulation amount is lower than the second preset threshold, it indicates that the accumulated water in the air inlet has been removed, and at this time, the air inlet is not prone to generating ice accumulation, and step 430 is performed.
430, the ultrasonic generator is turned off.
When the water accumulation amount is lower than a second preset threshold value, the water accumulation in the air inlet is removed, and therefore the ultrasonic generator can be closed.
According to the method for preventing the icing of the air inlet of the cooling tower based on the ultrasonic wave, provided by the embodiment of the invention, when the water accumulation amount of the air inlet is reduced to be below the second preset threshold value and the ice accumulation is not easy to generate at the air inlet, the ultrasonic generator is turned off, and the service life of the anti-icing equipment is prolonged.
Before the method for preventing the icing of the air inlet of the cooling tower based on the ultrasonic wave provided by the embodiment of the invention is applied, the water accumulation and the icing of the air inlet of the cooling tower are easy to happen, the air inlet of the cooling tower is blocked, and the heat exchange efficiency of cooling extraction is reduced; when the method is used, the water accumulation at the air inlet of the cooling tower is reduced, the cooling tower is not easy to freeze, and the air inlet of the cooling tower normally enters air, so that the heat exchange efficiency in the cooling tower is ensured.
Based on the method for preventing the air inlet of the cooling tower from being frozen based on the ultrasonic wave provided by the corresponding embodiment of fig. 1, the embodiment of the invention also provides a device for preventing the air inlet of the cooling tower from being frozen based on the ultrasonic wave, as shown in fig. 5.
Fig. 5 is a schematic structural diagram of an ultrasonic-based device for preventing icing at an air inlet of a cooling tower according to an embodiment of the present invention, where the ultrasonic-based device for preventing icing at an air inlet of a cooling tower may include a first acquisition module 510 and a control module 520; wherein:
the first collecting module 510 is used for collecting the water accumulation of the air inlet;
and the control module 520 is used for controlling the ultrasonic generator to emit the ultrasonic wave with the first frequency when the water accumulation amount reaches a first preset threshold value.
The collection module can be a collection line, collects the water accumulation amount of the air inlet and sends the collected water accumulation amount information to the control module.
The ultrasonic wave of first frequency can produce heat effect and mechanical effect on the ponding of air intake, and the heat effect can improve ponding temperature, and mechanical effect can make ponding vibration, makes ponding drip from the air intake, reduces the probability that the air intake freezes.
According to the device for preventing the freezing of the air inlet of the cooling tower based on the ultrasonic waves, which is provided by the embodiment of the invention, the first acquisition module can acquire the accumulated water quantity of the air inlet of the cooling tower, when the accumulated water quantity reaches the first preset threshold value, the control module controls the ultrasonic generator to send the ultrasonic waves with the first frequency, the accumulated water of the air inlet is removed by utilizing the thermal effect and the mechanical effect of the ultrasonic waves, the freezing of the air inlet is prevented, and therefore the heat exchange efficiency in the cooling tower is ensured.
In an embodiment of the invention, the collecting module may be that a plurality of collecting lines are distributed at an air inlet of the cooling tower, when the collecting line contacts the accumulated water, the collecting line contacting the accumulated water is short-circuited to generate current change, when the control module receives the current change, the proportion of the number of the collecting lines with the current change in the total number of the distributed collecting lines is calculated, and when the proportion reaches a preset threshold, the control module controls the ultrasonic generator to emit ultrasonic waves with a first frequency, so as to increase the temperature of the accumulated water and vibrate the accumulated water, so that the accumulated water drops.
According to the embodiment of the invention, the collection module collects the water accumulation amount of the air inlet, when the water accumulation amount reaches a first preset threshold value, the control module controls the ultrasonic generator to generate the ultrasonic wave with the first frequency, the water accumulation amount of the air inlet is reduced by using the thermal effect and the mechanical effect of the ultrasonic wave, the icing of the air inlet of the cooling tower is prevented, and therefore the heat exchange efficiency in the cooling tower is ensured.
In an embodiment of the present invention, the first preset threshold may include a plurality of thresholds, the first frequency may include a plurality of frequencies, each threshold has a frequency corresponding to the threshold, the frequency corresponding to the larger the threshold is, and the control module controls the frequency emitted by the ultrasonic generator according to the threshold reached by the accumulated water amount. And when the water accumulation amount reaches any one of the first preset thresholds, controlling the ultrasonic generator to emit ultrasonic waves with the frequency corresponding to the threshold.
According to the embodiment of the invention, the ultrasonic generator is controlled to emit corresponding frequency according to different threshold values reached by the water accumulation amount, so that the electric energy can be saved, the loss of the equipment for preventing the air inlet of the cooling tower from being frozen based on the ultrasonic wave is reduced, and the service life of the equipment is prolonged.
In an embodiment of the present invention, the control module 520 may be further configured to turn off the ultrasonic generator when the amount of accumulated water is lower than a second preset threshold.
When the water accumulation amount is lower than a second preset threshold value, the water accumulation in the air inlet is removed, and therefore the ultrasonic generator can be turned off.
In one embodiment of the present invention, the control module 520 may include a first judging unit and a first control unit; wherein:
the first judging unit is used for judging whether the water accumulation amount reaches a first preset threshold value or not and judging whether the water accumulation amount reaches a second preset threshold value or not;
the first control unit is used for controlling the ultrasonic generator to send out ultrasonic waves with first frequency when the water accumulation amount reaches a first preset threshold value, and is also used for closing the ultrasonic generator when the water accumulation amount is lower than a second preset threshold value.
In one embodiment of the invention, a first judging unit receives the water accumulation amount information acquired by a first acquiring module, judges whether the water accumulation amount reaches a first preset threshold value or not, and sends a judgment result to a first control unit, the first control unit receives the judgment result, and when the judgment result is that the water accumulation amount reaches the first preset threshold value, the first control unit controls an ultrasonic wave generating module to send out ultrasonic waves with a first frequency; the first judging unit judges whether the water accumulation amount reaches a second preset threshold value, and when the water accumulation amount is lower than the second preset threshold value, the ultrasonic generator is closed.
According to the device for preventing the icing of the air inlet of the cooling tower based on the ultrasonic waves, provided by the embodiment of the invention, the first judging unit can judge whether the accumulated water quantity of the air inlet of the cooling tower reaches the first threshold value, and when the accumulated water quantity reaches the first threshold value, the first control unit controls the ultrasonic generator to send the ultrasonic waves with the first frequency so as to remove the accumulated water. Meanwhile, the first judging unit judges whether the accumulated water amount reaches a second threshold value. And when the water accumulation amount does not reach the second threshold value, the water accumulation in the air inlet is removed, and therefore the ultrasonic generator is closed.
The device for preventing the icing of the air inlet of the cooling tower based on the ultrasonic waves can prevent the icing of the air inlet, thereby ensuring the heat exchange efficiency in the cooling tower.
In an embodiment of the present invention, the device for preventing icing at the air inlet of the cooling tower based on ultrasonic waves may further include:
the second collecting module 530 is configured to collect the temperature of return water when the water accumulation amount reaches a second preset threshold, where the return water is water cooled in the cooling tower;
the control module 520 is further configured to control the ultrasonic generator to emit ultrasonic waves of a second frequency when the temperature of the return water reaches a first preset temperature; and when the temperature of the return water is lower than a second preset temperature, controlling the ultrasonic generator to emit ultrasonic waves with the first frequency.
The second acquisition module can be a temperature sensor, acquires temperature information of the return water, sends the temperature information of the return water to the control module, and controls the ultrasonic generator to send ultrasonic waves of a second frequency when the temperature of the return water reaches a first preset temperature; and when the temperature of the return water is lower than a second preset temperature, controlling the ultrasonic generator to emit ultrasonic waves with the first frequency.
According to the device for preventing the air inlet of the cooling tower from being frozen based on the ultrasonic waves, which is provided by the embodiment of the invention, the temperature of the return water can be acquired through the second acquisition module, when the temperature of the return water reaches the first preset temperature, the fact that the ice accretion is generated at the air inlet is indicated, the control module controls the ultrasonic generator to emit the ultrasonic waves with the second frequency, and the ice accretion at the air inlet is melted by using the heat effect of the ultrasonic waves with the second frequency. When the accumulated ice melts and the temperature of the return water is lower than a second preset temperature, the heat exchange efficiency in the cooling tower returns to normal, the control module controls the ultrasonic generator to send ultrasonic waves with the first frequency so as to remove the accumulated water in the air inlet and prevent the air inlet from being frozen again, and therefore the heat exchange efficiency in the cooling tower is guaranteed.
In one embodiment of the present invention, the control module 520 may include a second determination unit and a second control unit; wherein:
the second judgment unit is used for receiving the temperature information of the return water sent by the second acquisition unit and judging whether the temperature of the return water reaches the first preset temperature or not or whether the temperature of the return water reaches the second preset temperature or not;
the second control unit is used for controlling the ultrasonic generator to send out ultrasonic waves with second frequency when the temperature of the return water reaches a first preset temperature; when the temperature of the return water is lower than a second preset temperature, controlling an ultrasonic generator to emit ultrasonic waves with a first frequency;
according to the device for preventing the icing of the air inlet of the cooling tower based on the ultrasonic waves, provided by the embodiment of the invention, when the judgment result of the second judgment unit is that the return water temperature reaches the first preset temperature, the icing of the air inlet is generated, the heat exchange efficiency in the cooling tower is reduced, the second control unit controls the ultrasonic generator to emit the ultrasonic waves with the second frequency, and the icing of the air inlet is melted by utilizing the heat effect of the ultrasonic waves with the second frequency. When the accumulated ice melts, the return water temperature is reduced, and the second judgment unit judges that the return water temperature is lower than the second preset temperature, the heat exchange efficiency in the cooling tower is recovered to be normal, the second control unit controls the ultrasonic generator to send ultrasonic waves with the first frequency so as to remove the accumulated water in the air inlet and prevent the air inlet from being frozen again, and therefore the heat exchange efficiency in the cooling tower is guaranteed.
Fig. 6 shows a schematic structural diagram of hardware for preventing icing at an air inlet of a cooling tower based on ultrasonic waves according to an embodiment of the present invention.
An apparatus for preventing icing at an ultrasonic-based cooling tower inlet may include a processor 601 and a memory 602 having stored thereon computer program instructions.
Specifically, the processor 601 may include a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement the embodiments of the present invention.
In one example, the Memory 602 may be a Read Only Memory (ROM). In one example, the ROM may be mask programmed ROM, programmable ROM (prom), erasable prom (eprom), electrically erasable prom (eeprom), electrically rewritable ROM (earom), or flash memory, or a combination of two or more of these.
The memory 602 may include Read Only Memory (ROM), Random Access Memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical, or other physical/tangible memory storage devices. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software comprising computer-executable instructions and when the software is executed (e.g., by one or more processors), it is operable to perform operations described with reference to the methods according to an aspect of the present disclosure.
The processor 601 reads and executes the computer program instructions stored in the memory 602 to implement the methods 110 to 130 in the embodiment shown in fig. 1, and achieve the corresponding technical effects achieved by the embodiment shown in fig. 1 executing the method, which is not described herein again for brevity.
In one example, the ultrasonic-based apparatus for preventing icing at an air inlet of a cooling tower may further include a communication interface 603 and a bus 610. As shown in fig. 6, the processor 601, the memory 602, and the communication interface 603 are connected via a bus 610 to complete communication therebetween.
The communication interface 603 is mainly used for implementing communication between modules, apparatuses, units and/or devices in the embodiments of the present invention.
The device for preventing the freezing of the air inlet of the cooling tower based on the ultrasonic waves can execute the method for preventing the freezing of the air inlet of the cooling tower based on the ultrasonic waves in the embodiment of the invention based on the accumulated water amount of the air inlet of the cooling tower, thereby realizing the method and the device for preventing the freezing of the air inlet of the cooling tower based on the ultrasonic waves, which are described in combination with the figures 1 and 6.
In one example, a schematic diagram of an apparatus for preventing icing at an air inlet of a cooling tower based on ultrasonic waves is shown in fig. 7, and comprises a water level sensor (shown in fig. 7-a), an ultrasonic controller (shown in fig. 7-b) and a frequency converter (shown in fig. 7-c).
The ultrasonic controller can select ATMEGA328P as a main control chip, has low power consumption, few interfaces and low cost, and can meet the requirements of the invention.
The principle of the ultrasonic generator is shown in fig. 8, and may include, but is not limited to, a frequency adjusting module, a potentiometer, a transformer, an output adjusting module, a transducer, and a power input module.
The ultrasonic controller provided by the embodiment of the invention can control the ultrasonic generator to send out ultrasonic waves according to the control signal sent out by the equipment shown in fig. 7.
The water level sensor can be used for collecting the water accumulation amount of the air inlet, the water level sensor respectively transmits the water accumulation amount information to a pin 27 and a pin 28 of the ultrasonic controller through an OUT interface and an O _ SCK interface, the ultrasonic controller judges according to logic, when the water accumulation amount reaches a first preset threshold value, a signal for starting the ultrasonic wave with the first frequency is output through a pin 12 of the ultrasonic controller, the signal for starting the ultrasonic wave with the first frequency is transmitted to a LOW interface of the frequency converter, and the frequency converter controls the ultrasonic generator (M) to emit the ultrasonic wave with the first frequency. And when the water accumulation amount is lower than a second preset threshold value, outputting a signal for stopping the ultrasonic wave of the second frequency through a 12-pin of the ultrasonic controller, transmitting the signal for stopping the ultrasonic wave of the second frequency to a LOW interface of the frequency converter, and controlling the ultrasonic generator (M) to be closed after the frequency converter receives the signal.
The equipment for preventing the freezing of the air inlet of the cooling tower based on the ultrasonic waves can control the ultrasonic waves with the first frequency to be sent according to the accumulated water quantity of the air inlet by collecting the accumulated water quantity of the air inlet, remove the accumulated water of the air inlet by utilizing the thermal effect and the mechanical effect of the ultrasonic waves, prevent the freezing of the air inlet and further ensure the heat exchange efficiency in the cooling tower.
The device for preventing the freezing of the air inlet of the cooling tower based on the ultrasonic waves can acquire the information of the accumulated water quantity and the return water temperature, and the ultrasonic wave controller controls the ultrasonic generator to send the ultrasonic waves with the first preset frequency or the second preset frequency according to the information of the accumulated water quantity and the return water temperature, so that the freezing of the air inlet of the cooling tower is prevented, and the heat exchange efficiency of the cooling tower is ensured.
The device for preventing the freezing of the air inlet of the cooling tower based on the ultrasonic waves can acquire the water accumulation amount information, and the ultrasonic wave controller controls the ultrasonic wave generator to send the ultrasonic waves with the first frequency according to the water accumulation amount and the return water temperature information, so that the freezing of the air inlet of the cooling tower is prevented, and the heat exchange efficiency of the cooling tower is ensured.
In one example, the device for preventing the cooling tower air inlet from being frozen based on the ultrasonic waves may further include a temperature sensor (as shown in fig. 7-d), the temperature sensor may be used to collect the return water temperature of the cooling water, the temperature sensor transmits the return water temperature information to pins 24 and 23 of the ultrasonic controller through an RS485_ a interface and an RS485_ B interface, the ultrasonic controller outputs a signal for starting the ultrasonic waves with the second frequency through pins 13 of the ultrasonic controller when the return water temperature reaches a first preset temperature according to logic judgment, the signal for starting the ultrasonic waves with the second frequency is transmitted to a HIGH interface of the frequency converter, and the frequency converter controls the ultrasonic generator (M) to emit the ultrasonic waves with the second frequency. And when the temperature of the return water is lower than a second preset temperature, outputting a signal for stopping the ultrasonic wave of the second frequency through a pin 13 of the ultrasonic controller, transmitting the signal for stopping the ultrasonic wave of the second frequency to a HIGH interface of the frequency converter, and controlling the ultrasonic generator (M) to stop sending the ultrasonic wave of the second frequency after the frequency converter receives the signal.
The device for preventing the freezing of the air inlet of the cooling tower based on the ultrasonic waves can acquire the information of the accumulated water quantity and the return water temperature, and the ultrasonic wave controller controls the ultrasonic generator to send the ultrasonic waves with the first frequency or the ultrasonic waves with the second frequency according to the information of the accumulated water quantity and the return water temperature, so that the freezing of the air inlet of the cooling tower is prevented, and the heat exchange efficiency of the cooling tower is ensured.
In one example, the ultrasonic wave based device for preventing the air inlet of the cooling tower from being frozen may further include a USB serial port (as shown in fig. 7-e), and the 30 pins and the 31 pins of the ultrasonic wave controller are respectively connected with the 3 pins and the 2 pins of the USB serial port to realize the conversion from the serial port to the USB interface of the computer.
In one example, the ultrasonic wave based device for preventing icing at the air inlet of the cooling tower can further comprise a reset circuit (shown in fig. 7-f), and the reset circuit can enable the ultrasonic controller to operate again when the ultrasonic controller cannot work normally.
In addition, in combination with the method for preventing the air inlet of the cooling tower from being frozen based on the ultrasonic wave in the above embodiment, the embodiment of the present invention may provide a computer storage medium to implement. The computer storage medium having computer program instructions stored thereon; the computer program instructions, when executed by a processor, implement any of the above-described embodiments of a method for preventing icing at an air inlet of a cooling tower based on ultrasonic waves.
It is to be understood that the invention is not limited to the specific arrangements and instrumentality described above and shown in the drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present invention are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications and additions or change the order between the steps after comprehending the spirit of the present invention.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic Circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
It should also be noted that the exemplary embodiments mentioned in this patent describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
Aspects of the present disclosure are described above with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions/acts specified in the flowchart and/or block diagram block or blocks. Such a processor may be, but is not limited to, a general purpose processor, a special purpose processor, an application specific processor, or a field programmable logic circuit. It will also be understood that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware for performing the specified functions or acts, or combinations of special purpose hardware and computer instructions.
As described above, only the specific embodiments of the present invention are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.
Claims (10)
1. A method for preventing an air inlet of a cooling tower from being frozen based on ultrasonic waves is characterized by comprising the following steps:
collecting the water accumulation of the air inlet;
and when the water accumulation amount reaches a first preset threshold value, controlling the ultrasonic generator to emit ultrasonic waves with a first frequency.
2. The method of claim 1, wherein after the controlling the sonotrode to emit the ultrasonic waves of the first frequency, the method further comprises:
when the water accumulation amount reaches a second preset threshold value, collecting the temperature of return water, wherein the return water is water cooled in the cooling tower;
and when the temperature of the return water reaches a first preset temperature, controlling the ultrasonic wave to emit ultrasonic wave of a second frequency.
3. The method of claim 2, wherein after said controlling the ultrasonic waves to emit ultrasonic waves of a second frequency, the method further comprises:
and when the temperature of the return water is lower than a second preset temperature, controlling the ultrasonic generator to emit ultrasonic waves with the first frequency.
4. The method of claim 3, wherein after said controlling the sonotrode to emit ultrasound at the first frequency, the method further comprises:
and when the water accumulation amount is lower than the second preset threshold value, closing the ultrasonic generator.
5. The method of claim 1, wherein after the controlling the sonotrode to emit ultrasound at the first frequency, the method further comprises:
and when the water accumulation amount is lower than the second preset threshold value, closing the ultrasonic generator.
6. The utility model provides a device for preventing cooling tower air intake freezes based on ultrasonic wave which characterized in that, the device includes:
the first collecting module is used for collecting the water accumulation of the air inlet;
and the control module is used for controlling the ultrasonic generator to send out ultrasonic waves with first frequency when the water accumulation amount reaches a first preset threshold value.
7. The apparatus of claim 6, further comprising:
the second acquisition module is used for acquiring the temperature of return water when the water accumulation amount reaches a second preset threshold value, wherein the return water is water cooled in the cooling tower;
the control module is further used for controlling the ultrasonic generator to send out ultrasonic waves of a second frequency when the temperature of the return water reaches a first preset temperature; and when the temperature of the return water is lower than a second preset temperature, controlling the ultrasonic generator to emit ultrasonic waves with the first frequency.
8. The apparatus of claim 6, wherein the control module is further configured to:
and when the water accumulation amount is lower than the second preset threshold value, closing the ultrasonic generator.
9. The utility model provides an equipment that prevents freezing of cooling tower air intake based on ultrasonic wave which characterized in that, equipment includes: a processor, and a memory storing computer program instructions; the processor reads and executes the computer program instructions to implement the method for preventing icing at the air inlet of the cooling tower based on ultrasonic waves according to any one of claims 1 to 5.
10. A computer storage medium having computer program instructions stored thereon, which when executed by a processor, implement the method for preventing icing on an ultrasonic-based cooling tower air inlet according to any one of claims 1 to 5.
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