KR100704421B1 - Three-dimensional electronic anti-fouling device and method thereof - Google Patents

Abstract

The present invention relates to a three-dimensional fouling reduction apparatus and method, in particular a frequency input unit for generating a frequency and amplitude setting signal for each of the high frequency and low frequency in accordance with the user's operation; A frequency and amplitude setting signal for a high frequency is input from the frequency input unit, and a sinusoidal high frequency signal is generated accordingly, and a maximum (max) sinusoidal waveform is output, and a frequency control range of 2Khz to 3Khz and 0V to A high frequency oscillator having an output control range of 15V peak; A low frequency oscillator for receiving a frequency and amplitude setting signal for a low frequency from the frequency input unit and generating a low frequency signal of a square waveform according to the frequency input unit; A mixing amplifier for mixing and amplifying a high frequency signal of a sinusoidal wave input from the high frequency oscillator and a low frequency signal of a square wave received from the low frequency oscillating unit to output a double frequency; And an induction coil wound around the outside of the conduit through which the fluid flows to form an electromagnetic field by applying a signal to the mixing amplifier. According to the present invention, the mineral contained in the fluid during the three-dimensional electric field is passed. As the chance of collision of ions increases, crystallization is easy, and the growth rate through the association of nuclei due to flow disturbance increases, the concentration of mineral ions in the fluid decreases, and the scale is formed in the tube such as heat exchanger. It suppresses the formation of, and has an effect of easy removal in the form of soft calcite.

 3D, fouling, molecular disturbance (MAIM), calcite, frequency input, high frequency oscillator, low frequency oscillator, mixing amplifier

Description

Three-dimensional electronic anti-fouling device and method

1 is a functional block diagram for explaining the configuration of a three-dimensional fouling reduction apparatus according to an embodiment of the present invention,

2 is a reference diagram for explaining the principle of production of controllable calcium carbonate particles to which the present invention is applied;

3 is a reference diagram for explaining the principle of EAF scale reduction technology to which the present invention is applied,

4 is a reference diagram showing a three-dimensional electromagnetic force generated by the three-dimensional fouling reducing apparatus according to an embodiment of the present invention,

5 is a graph showing a comparison of the heat transfer rate according to the three-dimensional and two-dimensional fouling test results in the unidirectional circulation system,

Figure 6 is a waveform diagram for comparing the electrical waveform according to the results of the three-dimensional and two-dimensional fouling test in the unidirectional circulation system.

<Explanation of symbols for the main parts of the drawings>

100: frequency input unit 200: high frequency oscillation unit

300: low frequency oscillator 400: mixing amplifier

500: oscilloscope 600: induction coil

The present invention relates to a three-dimensional fouling reduction device and method, and more particularly, to supply an induction coil wound in a conduit with a dual frequency mixed and amplified high frequency and low frequency, the induction coil in the conduit through which the fluid wound The present invention relates to a three-dimensional fouling reduction device and method for generating a three-dimensional electromagnetic force.

In general, fouling generated on the heat transfer surface is one of the causes of greatly reducing the efficiency of the manufacturing process and the boiler equipment, and includes materials (silica, calcium carbonate, calcium sulfate, microorganism, carbon, etc.) included in the thermal medium. ) Is a phenomenon in which crystals are formed due to reaction with other components or the melting conditions change with the change of temperature during heat exchange to deposit or scale on the surface of the heat exchanger.

These scales act as the largest thermal resistance of the total thermal resistance, causing enormous energy loss, forming scales at the intersections of pipes, increasing the coefficient of friction, and generating pressure losses in the heat exchange system, preventing smooth operation. This is a serious detrimental factor for boiler life and energy efficiency.

Studies on the prevention of fouling in boilers, etc., began in 1821 when it was known that potato starch reduced the rate of sedimentation of scale, the main cause of fouling. Since then, several physical and chemical methods have been proposed. One method is chemical customs using strong acid.

However, this method has a problem of stopping operation during treatment and waste acid treatment after treatment, aside from its cost.

Other on-line reduction and removal methods include particle rotation methods, scale generation prevention methods using magnetic fields, water pretreatment methods and reduction and removal methods using ultrasonic waves. It is known that there is only a ring reduction effect, and the reduction effect is less than 40% on average. Therefore, periodic fouling must be eliminated off-line. And while the efficiency can not be a big effect, while using the ultrasonic equipment can be reduced and eliminated the scale, it is superior to other methods in terms of efficiency, and economically reduce the loss, while also having the eco-friendly advantages.

In addition, the fouling phenomenon interrupts the flow of the fluid in the heat exchanger to increase the resistance to flow, and increases the heat resistance of the tube group to reduce the amount of heat transfer, thereby reducing not only the heat transfer performance but also the life of the heat exchanger. It causes serious problems such as degradation and damage.

Looking at the various forms of fouling and the reduction method according to the fouling causing the above problems in more detail as follows.

First, vessels storing liquids or conduits used to transport liquids often accumulate minerals contained therein.

)들은 중탄산염 이온(

)들과 결합하여 탄산칼슘(

) 입자들을 생성하고, 광 물질은 유체 내에서 여러가지 형태로 축적된다. 어떤 광물 이온들은 유동하는 유체 내에서 결합하여 부드럽고 엉성한 형태의 입자로 결정화되어 고체 표면에 부착되며, 이를 일반적으로 입자 파울링(particulate fouling)이라 칭한다.For example, calcium ions (

) Are bicarbonate ions (

Combined with calcium carbonate (

) Particles, and minerals accumulate in various forms in the fluid. Some mineral ions bind in a flowing fluid and crystallize into particles in a soft, coarse form and adhere to a solid surface, commonly referred to as particle fouling.

In another case, ions contained in the liquid adhere to the heat transfer surface with hard crystals to form scale, which is called crystallization fouling or precipitation fouling.

The material deposited on the solid surface in such a crystalline form and generally accumulated is called a scale, and the generated scale causes serious problems in various heat exchangers. Solubility of mineral components, such as calcium carbonate, a representative scale-forming substance, decreases with increasing water temperature, which is called reverse solubility characteristics. As a result, when water enters the heat exchanger and the temperature increases, this reverse solubility characteristic causes mineral ions to precipitate in the water and accumulate in the highest temperature.

이온은

이온과 반응하여 열전달 표면에 직접 부착이 된다.In other words,

Ion is

It reacts with ions and adheres directly to the heat transfer surface.

In the case of calcium ions, the reaction formula is as follows.

가 열전달 표면에서 반응할 때,

입자는 열전달 표면에 부착되어 스케일을 형성하며, 지나친 스케일의 발생은 열교환기를 손상시키고, 열전달률을 감소시킴은 물론, 극한적인 경우에 스케일은 열전달 장치를 영구적으로 사용하지 못하게 할 수도 있다.here

When reacts on the heat transfer surface,

Particles adhere to the heat transfer surface to form a scale, and the generation of excessive scale can damage the heat exchanger, reduce the heat transfer rate, and in extreme cases, the scale can render the heat transfer device permanently unavailable.

Minerals accumulating in conduits and heat exchangers of fluids must be removed on a regular basis. Brush punching, consisting of very rough surfaces, is a suitable method for removing relatively soft mineral deposits attached by particle fouling. However, it is not very effective in removing the scale formed by crystallization fouling, and thus an additional removal method is required.

For example, it is desirable to use acidic cleansing agents with brush punching to remove scales that have accumulated tightly on the heat transfer surface. However, these techniques require a lot of time and labor, and have the problem of stopping the system periodically.

이온과

이온들이 서로 결합할 수 있도록 하는 전기장이 사용되는데, 한 가지 혹은 그 이상의 요소들이 유체 내부에 간접적인 전기장을 발생시키도록 도관이나 용기의 외부에 설치된다.As a physical alternative means to solve the above problems

With ion

An electric field is used that allows ions to bind to one another, with one or more elements installed outside the conduit or vessel to generate an indirect electric field inside the fluid.

The electric field generated by an indirect method in the fluid is limited in reducing scale formation because it does not provide an electric field strong enough to effectively produce crystal grains in the fluid.

For example, it is well known that winding a solenoid coil over a flowing conduit and flowing an alternating orthogonal waveform of positive and negative poles creates a pulsating induced electric field in the fluid. That is, the electric field generated in water is governed by Faraday's law, and according to this Faraday's law, the electric field E is expressed as follows.

Where E is the induction electric field vector, S is the line vector in the electric field, B is the magnetic strength vector, and A is the cross-sectional area of the solenoid coil.

As such, when an electric current flows by winding a solenoid coil on a conduit, an induction electric field is formed in water, but the strength of the electric field is very limited and has a small value.

As described so far, it is clear that physical techniques using indirectly generated electric fields are limited in reducing the scale of fouling.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, the object of the present invention is to supply a dual frequency to the induction coil wound around the conduit to generate a three-dimensional electromagnetic force in the conduit flowing fluid The collision chance of mineral ions contained in the fluid is increased during the passage of the electric field of the dimension, so that it is easy to crystallize, the growth rate through the association of nuclei due to the flow disturbance is increased, and it is formed in the tube such as a heat exchanger. It is to provide a three-dimensional fouling reduction device and method that suppresses the generation of scale, and facilitates the removal in the form of smooth calcite.

Three-dimensional fouling reduction apparatus of the present invention for achieving the above object, the frequency input unit for generating a frequency and amplitude setting signal for each of the high frequency and low frequency according to the user's operation;

A frequency and amplitude setting signal for a high frequency is input from the frequency input unit, and a sinusoidal high frequency signal is generated accordingly, and a maximum (max) sinusoidal waveform is output, and a frequency control range of 2Khz to 3Khz and 0V to A high frequency oscillator having an output control range of 15V peak;

A low frequency oscillator for receiving a frequency and amplitude setting signal for a low frequency from the frequency input unit and generating a low frequency signal of a square waveform according to the frequency input unit;

A mixing amplifier for mixing and amplifying a high frequency signal of a sinusoidal wave input from the high frequency oscillator and a low frequency signal of a square wave received from the low frequency oscillating unit to output a double frequency; And

And an induction coil wound around the outside of the conduit through which the fluid is applied to form a electromagnetic field by applying a signal to the mixing amplifier.

On the other hand, the three-dimensional fouling reduction method of the present invention, the step of inputting the setting signal of the frequency and amplitude for high frequency and low frequency;

Generating a high frequency signal having a sinusoidal waveform adjusted in a frequency adjusting range of 2Khz to 3Khz and an output adjusting range of 0V to 15V peak by the input high frequency related signal and amplitude setting signal;

Generating a low frequency signal of a square waveform adjusted in a frequency control range of 500 hz to 1 kHz and an output control range of 0 V to 15 V peak by the input low frequency related signal of a frequency and amplitude;

Mixing the high frequency signal and the low frequency signal in a maximum output range having a 15 V peak and 1.5 A max to output a double frequency; And

And transmitting the output electrical signal to the induction coil.

Hereinafter, a three-dimensional fouling reducing apparatus and method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a functional block diagram illustrating a three-dimensional fouling reducing apparatus according to an embodiment of the present invention, the three-dimensional fouling reducing apparatus according to an embodiment of the present invention is a frequency input unit 100, high frequency oscillation unit 200, the low frequency oscillator 300, the mixing amplifier 400, the oscilloscope 500 and the induction coil 600.

The frequency input unit 100 generates a set signal of frequency and amplitude for high frequency and low frequency according to a user's operation, and outputs the set signal to the high frequency oscillator 200 and the low frequency oscillator 300, respectively.

The high frequency oscillator 200 receives a setting signal of a frequency and an amplitude for a high frequency input by a user through the frequency input unit 100 and generates a sinusoidal high frequency signal according to the mixing amplifier. It serves to output to (400).

At this time, the high frequency oscillator 200 outputs a sine wave of the maximum (max) 3Khz, is configured to have a frequency control range of 2Khz ~ 3Khz and an output control range of 0V ~ 15V peak (peak).

The low frequency oscillator 300 receives a setting signal of a frequency and an amplitude for a low frequency input by a user through the frequency input unit 100 and generates a low frequency signal of a square waveform according to the mixing amplifier 400. It prints in).

Here, the low frequency oscillator 300 outputs a square wave of maximum (max) 1Khz, but is configured to have a frequency control range of 500hz ~ 1Khz and an output control range of 0V ~ 15V peak (peak).

The mixing amplifier 400 mixes and amplifies a sinusoidal high frequency signal received from the high frequency oscillator 200 and a square wave low frequency signal input from the low frequency oscillator 300 to an induction coil 600. It plays a role of outputting.

At this time, the mixing amplifier 400 outputs a dual frequency of mixing and amplifying the high frequency and low frequency, the maximum output is configured to have a 15V peak and 1.5A max.

In addition, the oscilloscope 500 serves to display the waveform of the dual mixing amplified frequency so that the operator can visually check, the oscilloscope 500 is connected to the output terminal of the mixing amplifier 400.

The induction coil 600 is a coil wound outside the conduit 1 through which fluid flows to generate an electromagnetic field by applying a signal from the mixing amplifier 400, and is input through an output terminal of the mixing amplifier 400. The dual frequency received serves to generate a three-dimensional electromagnetic force (EMF) on the fluid flowing through the conduit (1).

Then, the operation of the three-dimensional fouling reduction device according to an embodiment of the present invention having the configuration as described above will be described with reference to the accompanying drawings.

) 입자의 생성 원리와, EAF(Electrolytic Anti Fouling) 스케일(Scale) 저감 기술 원리를 설명하여 본 발명의 이해를 돕기로 한다.First, prior to explaining the three-dimensional fouling reducing apparatus according to an embodiment of the present invention, with reference to the accompanying drawings controllable calcium carbonate (

) Principle of the generation of particles and the principle of EAF (Electrolytic Anti Fouling) Scale reduction technology will be explained to help the understanding of the present invention.

) 입자의 생성 원리를 설명하는 참고도이고, 도 3은 본 발명에 적용되는 EAF 스케일 저감 기술 원리를 설명하는 참고도이다.Figure 2 is a controllable calcium carbonate (applicable to the present invention)

) Is a reference diagram for explaining the principle of generation of particles, Figure 3 is a reference diagram for explaining the principle of the technique of EAF scale reduction applied to the present invention.

), 중탄산염이온(

)들이 인위적으로 결합되어 제어 가능한 탄산칼슘(

) 입자로 생성되는 과정을 보여준다.First, FIG. 2 shows the cause of the scale remaining in the solution, namely calcium ion, by the pulsed induced electromotive force generation.

), Bicarbonate ion (

) Are artificially combined to control calcium carbonate (

) Shows the process of forming particles.

거품(bubble)에 의한 스케일의 제거가 가능해진다.The principle of the generation of calcium carbonate particles is a fouling reduction device by a magnetic interference (MAIM: Modular Agitation by Inducted Magnetic Field), which removes insoluble water-insoluble calcium carbonate suspended solids, calcium ions and bicarbonate ions And

Removal of scale by bubbles is enabled.

In addition, FIG. 3 shows that water treated by molecular disturbance (MAIN) in FIG. 2 does not form scale as a stable unsaturated state (insoluble).

입자가 만들어지고, 이에 따라 포화된(saturated) 상태에 완화되는 효과와 생성된

입자는 스케일로서 벽면에 부착되는 정도가 약한 부드러운 방해석(calcite : 탄산무수염 광물의 일종) 조직이 되는 효과가 더해져서 스케일이 저감되고, 또한 배열이 좋은 구조로 인해 기 생성된 스케일도 제거되는 거품효과도 얻을 수 있게 된다.That is, insoluble in an electromagnetic device in an unstable supersaturated solution state.

Particles are produced, thus mitigating to the saturated state and resulting

Particles are bubbles, which are scaled down by the effect of forming a soft calcite (calcite) structure that has a weak adherence to the wall as a scale, and also eliminates the previously generated scale due to the good arrangement. You will also get effects.

) 입자의 생성 원리와, EAF 스케일 저감 기술 원리에 적용되는 본 발명의 일 실시예에 따른 3차원 파울링 저감장치의 동작을 도 1을 참조하여 설명하기로 한다.Controllable calcium carbonate in FIGS. 2 and 3 as described above (

) The operation of the three-dimensional fouling reduction device according to an embodiment of the present invention that is applied to the generation principle of the particles and the EAF scale reduction technology principle will be described with reference to FIG. 1.

First, in the three-dimensional fouling reducing device of the present invention, as shown in Figure 1, the induction coil 600 is wound around the outer peripheral surface of the conduit (1) through which the fluid flows, both ends of the induction coil 600, the mixing The output terminal of the amplifier 400 is connected.

Thereafter, the user adjusts the frequency and amplitude of the high frequency and the low frequency through the control of the operation panel of the frequency input unit 100, and the frequency and amplitude of the high frequency and the low frequency according to the operation of the user's operation panel. A set signal is output to the high frequency oscillator 200 and the low frequency oscillator 300, respectively.

Subsequently, the high frequency oscillator 200 receives the set signal of the frequency and amplitude of the high frequency from the frequency input unit 100, performs a processing operation according thereto, generates a high frequency signal of a corresponding sine wave, and the mixing amplifier. Output at 400.

Here, the high frequency oscillator 200 outputs a sine wave of the maximum (max) 3Khz, according to the operation through the frequency input unit 100 by the user, the frequency control range 2Khz ~ 3Khz, the output control range 0V ~ 15V peak ( The high frequency of the sine wave adjusted within the peak) is output.

On the other hand, the low frequency oscillator 300 receives the setting signal of the frequency and amplitude for the low frequency from the frequency input unit 100, and performs a processing operation accordingly to generate a low frequency signal of the corresponding square waveform and the mixing amplification Output to unit 400.

Here, the low frequency oscillator 300 outputs a square wave of a maximum (max) of 1Khz, but the frequency control range 500hz ~ 1Khz and 0V ~ 15V peak (peak) in accordance with the operation by the user through the frequency input unit 100 The low frequency of the adjusted square waveform is output from.

Subsequently, the mixing amplifier 400 mixes and amplifies a sinusoidal high frequency signal received from the high frequency oscillator 200 and a square wave low frequency signal input from the low frequency oscillator 300 to the induction coil 600. Output through both ends of.

At this time, the mixing amplifier 400 outputs a dual frequency in which the high frequency of the sinusoidal waveform and the low frequency of the square waveform are mixed and amplified according to the manipulation through the frequency input unit 100 by the user.

Then, in the conduit 1 in which the induction coil 600 is wound, as shown in FIG. 4, the three-dimensional electromagnetic force due to the double frequency is increased.

This gives a very strong electrochemical effect on the working fluid, based on the electric / magnetic field, and combines the electromagnetism effect with good crystal properties of particles and nuclei in the precipitation phenomenon that occurs when the working fluid rises in temperature in terms of heat exchange. By changing, it changes to the characteristic which fouling formation is suppressed. These properties mean that they are changed hydrodynamically and chemically.

FIG. 5 is a graph showing heat transfer rates according to the results of three-dimensional and two-dimensional fouling test in a unidirectional circulation system, and FIG. 6 is a three-dimensional and two-dimensional fouling in a unidirectional circulation system. The waveform diagram is shown to compare the electrical waveform according to the test result.

As can be seen in Figure 5, when comparing the fouling heat resistance after 220 minutes, it is 0.00025 m 2 Ｋ / Watt when the three-dimensional fouling reducing device, 0.0004 m 2 / ° when the two-dimensional fouling reducing device Watt, it can be seen that the 3D fouling reduction device has a significant improvement of about 60% compared to the 2D fouling reduction device.

As can be seen in FIG. 6, it can be seen that the waveforms applied by the three-dimensional fouling reduction device and the two-dimensional fouling reduction device are also different in the electrical waveform.

On the other hand, the oscilloscope 500 serves to display the waveform of the dual mixing amplified frequency so that the operator can visually check, the oscilloscope 500 is connected to the output terminal of the mixing amplifier 400.

Although the present invention has been described in more detail with reference to the examples, the present invention is not necessarily limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention.

As described above, according to the three-dimensional fouling reduction device according to the present invention, a dual frequency of mixing and amplifying a high frequency and a low frequency is supplied to an induction coil wound around a conduit, and the induction coil is wound around a three-dimensional conduit through which fluid flows. By allowing electromagnetic force to be generated, the collision chance of mineral ions contained in the fluid during the three-dimensional electric field is expanded, and crystallization is easy through the expansion of the collision chance between such ions, and nuclei due to flow disturbance As the growth rate increases through the combination of these minerals, the concentration of mineral ions in the fluid decreases, and the formation of scales formed in the tubes such as heat exchangers can be suppressed, and even if scales are formed, soft calcite (carbonate) is produced. It is easy to remove in the form of anhydrous mineral).

입자의 크기를 증대(저온에서 결정화)시키는 효과가 있다.In addition, the expansion of the collision chance of ions is further expanded through the increase of induced electric field change (EMF increase), the increase of magnetic force, and the increase of electrostatic double layer force, and soft calcite. Phosphorus insoluble

There is an effect of increasing the size of the particles (crystallization at low temperature).

In addition, the degree of supersaturation in the heat exchange surface is weakened, thereby reducing the crystallization fouling (Crystallization fouling) effect is increased.

Claims (7)

delete delete A frequency input unit for generating frequency and amplitude setting signals for high and low frequencies, respectively, according to a user's operation; A frequency and amplitude setting signal for a high frequency is input from the frequency input unit, and a sinusoidal high frequency signal is generated accordingly, and a maximum (max) sinusoidal waveform is output, and a frequency control range of 2Khz to 3Khz and 0V to A high frequency oscillator having an output control range of 15V peak; A low frequency oscillator for receiving a frequency and amplitude setting signal for a low frequency from the frequency input unit and generating a low frequency signal of a square waveform according to the frequency input unit; A mixing amplifier for mixing and amplifying a high frequency signal of a sinusoidal wave input from the high frequency oscillator and a low frequency signal of a square wave received from the low frequency oscillating unit to output a double frequency; And And an induction coil wound around an outside of a conduit through which a fluid flows to generate an electromagnetic field by applying a signal to the mixing amplifier. The method of claim 3, wherein The low frequency oscillator outputs a square wave of the maximum (max) 1Khz, three-dimensional fouling reduction device characterized in that it has a frequency control range of 500hz ~ 1Khz and the output control range of 0V ~ 15V peak. The method according to claim 3 or 4, The mixing amplifier outputs a dual frequency of the high frequency and low frequency mixing amplification, the maximum output is a three-dimensional fouling reduction device, characterized in that the 15V peak and 1.5A max. delete Inputting a set signal of frequency and amplitude for high and low frequencies; Generating a sinusoidal high frequency signal adjusted in a frequency adjusting range of 2Khz to 3Khz and an output adjusting range of 0V to 15V peak by the input high frequency related signal and amplitude setting signal; Generating a low frequency signal of a square waveform adjusted in a frequency control range of 500 hz to 1 kHz and an output control range of 0 V to 15 V peak by the input low frequency related signal of a frequency and amplitude; Mixing the high frequency signal and the low frequency signal in a maximum output range having a 15 V peak and 1.5 A max to output a double amplified frequency; And 3D fouling reduction method characterized in that the step of transmitting the output electrical signal to the induction coil.

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