CN210656291U - Scale inhibition and removal device based on random pulse sequence alternating electromagnetic field - Google Patents
Scale inhibition and removal device based on random pulse sequence alternating electromagnetic field Download PDFInfo
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- CN210656291U CN210656291U CN201921723173.0U CN201921723173U CN210656291U CN 210656291 U CN210656291 U CN 210656291U CN 201921723173 U CN201921723173 U CN 201921723173U CN 210656291 U CN210656291 U CN 210656291U
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Abstract
A scale inhibition and removal device based on a random pulse sequence alternating electromagnetic field comprises: a ferrite core ring for forming a toroidal magnetic circuit; the excitation coil is wound on the ferrite magnetic core ring and used for exciting to generate an alternating magnetic field; a detection coil wound on the ferrite core ring and used for detecting oscillation information; an alternating electromagnetic field working circuit and an alternating electromagnetic field driving circuit for generating a random pulse sequence; the excitation coil is connected with the alternating electromagnetic field driving circuit, and the alternating electromagnetic field driving circuit is connected with the detection coil and the alternating electromagnetic field working circuit. The utility model has the functions of scale inhibition and scale removal, can greatly inhibit the formation and deposition of scale under the comprehensive action of the oscillation attenuation alternating electromagnetic field, has adjustable parameters, does not have chemical addition, and is green and environment-friendly; the method can be suitable for physical scale treatment of different water flow systems, and is suitable for the technical field of water treatment of industrial cooling circulating water and industrial and civil water supply and drainage.
Description
Technical Field
The utility model relates to a physics field especially relates to the dirt scale removal processing technology that hinders of circulating water system pipeline inner wall, especially a dirt scale removal device that hinders based on random pulse sequence alternating electromagnetic field.
Background
The scale is a very common phenomenon, the main components of the scale are calcium carbonate, magnesium carbonate, calcium sulfate and other insoluble salts, the scale exists in the nature, daily life and various industrial production processes, particularly in industrial cooling circulating water and industrial and civil water supply and drainage systems, the inner wall of a water flow system pipeline is very easy to form the scale, the normal operation of production is influenced, the key harmfulness is very large, the heat exchange efficiency is reduced, the energy consumption is increased, the scale on the inner wall of metal is corroded and blocked, and the like, so the scale needs to be treated.
The treatment of scale can be divided into chemical treatment and physical treatment. Chemical treatment is the main method of water treatment at present, generally, the corrosion and scale inhibitor with a phosphorus formula is added into a water flow system at certain intervals, the effect is quick, but the maintenance cost is high, and the water system pollution and the environment pollution after the discharge are caused. Therefore, from the beginning and middle of the twentieth century, physical water treatment methods have been studied, and since the success of reducing boiler scale by magnetizing water and patenting in Belgium in 1945, physical methods have attracted more and more attention, and various methods for physically treating water systems have come into play.
Hitherto, as a method for physically treating scale in a water flow system, there have been a magnetization treatment method, a high-voltage electrostatic field treatment method, an ultrasonic treatment method, a high-frequency electromagnetic method, and the like. The magnetization only arranges substances of weak magnetic molecules in water in order, accelerates crystallization in the water solution, slows down direct crystallization and deposition of salts on a heated surface, plays a certain role in scale inhibition, has poor scale removal effect and requires a strong magnetic field; the scale prevention and inhibition mechanism of the high-voltage electrostatic field is that polar molecules are orderly arranged under the action of the high-voltage electrostatic field, so that large associated molecular groups are changed into small molecular groups or even single molecules, the scale inhibition is similar to a strong magnetic magnetization method, but electrodes are required to be contacted with an aqueous solution, and certain insecurity is brought. The ultrasonic waves resonate scales attached to the wall of a water pipe by using high-frequency ultrasonic waves, and break and peel the scales, so that the ultrasonic wave is suitable for loosening the scales with small quantity. The high-frequency electromagnetic method is an attempt to combine the first three advantages, and utilizes the resonance generated by an external electromagnetic field and water molecules to change the existence form of the water molecules and the combination state of the water molecules and other ions, so as to change the solubility, the crystallization process and the like of scale substances in the water molecules, but the method is still in the research and research stage at present.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a have scale inhibition and scale removal function concurrently, the effect is obvious, and the parameter is adjustable, and can adapt to different water flow system's physical incrustation scale processing apparatus.
In order to solve the technical problem, the technical scheme of the utility model is to provide a scale inhibition and removal device based on random pulse sequence alternating electromagnetic field, a serial communication port, include:
a ferrite core ring for forming a toroidal magnetic circuit;
the excitation coil is wound on the ferrite magnetic core ring and used for exciting to generate an alternating magnetic field;
a detection coil wound on the ferrite core ring and used for detecting oscillation information;
an alternating electromagnetic field working circuit and an alternating electromagnetic field driving circuit for generating a random pulse sequence;
the excitation coil is connected with the alternating electromagnetic field driving circuit, and the alternating electromagnetic field driving circuit is connected with the detection coil and the alternating electromagnetic field working circuit.
Preferably, the alternating electromagnetic field working circuit is formed by sequentially connecting a working power supply, a microprocessing and computing unit MCU, a random square wave pulse sequence shaping and output circuit.
More preferably, the alternating electromagnetic field driving circuit comprises a half-bridge driving module, the half-bridge driving module is connected with the base electrode and the emitter electrode of the first driving transistor, and the collector electrode of the first driving transistor is connected with the oscillation driving power supply; the half-bridge driving module is also connected with a base electrode and a collector electrode of a second driving transistor, and an emitter electrode of the second driving transistor is grounded; the emitter of the first driving transistor and the collector of the second driving transistor are both connected with one end of a primary side inductor of the impedance matching transformer, the other end of the primary side inductor is connected with one end of a capacitor, and the other end of the capacitor is grounded; two ends of a secondary inductor of the impedance matching transformer are respectively connected with two ends of the exciting coil; one end of the detection coil is connected with one end of the rectification module, the other end of the detection coil is grounded, the other end of the rectification module is connected with one end of the voltage division module, and the other end of the voltage division module is connected with the microprocessing and computing unit MCU.
Further, the microprocessing and computing unit MCU randomly generates pulse square wave sequences by utilizing a random square wave pulse sequence shaping and output circuit based on a random algorithm, each pulse square wave comprises a high level and a low level with adjustable duty ratio, and the time width T of the pulse square wavepSetting the time delay t between the pulse square waves of the successive pulses according to 10-200 times of the sinusoidal oscillation period of the electromagnetic field pulse sequencedAnd random within the range of 0.01-10 milliseconds.
Furthermore, the random pulse square wave sequence triggers the half-bridge driving module to control the on-off of the first driving transistor and the second driving transistor, the high level of the square wave pulse enables the first driving transistor to be switched on and the second driving transistor to be switched off, and the low level enables the first driving transistor to be switched off and the second driving transistor to be switched on; under the control of a random pulse square wave sequence, an oscillation driving power supply randomly charges and discharges a capacitor, a loop is conducted with an equivalent resistor to meet an under-damped oscillation condition, and a pair of forward oscillation attenuation and reverse oscillation attenuation alternating voltages are randomly obtained on a primary side inductor of an impedance matching transformer;
a pair of pairs of forward oscillation attenuation and reverse oscillation attenuation alternating voltages are randomly obtained on a primary side inductor, and forward oscillation attenuation and reverse oscillation attenuation alternating currents with the maximum current amplitude are obtained by an exciting coil wound on a ferrite magnetic core ring through a secondary side inductor of an impedance matching transformer; generating a forward oscillation attenuation and reverse oscillation attenuation alternating magnetic field with the maximum magnetic induction intensity amplitude in the ferrite magnetic core ring; the alternating oscillation attenuation magnetic field can be excited to generate an alternating oscillation attenuation electric field, the alternating oscillation attenuation electric field and the alternating magnetic field are mutually excited to generate an alternating electromagnetic field, and the oscillation frequency, the attenuation characteristic and the random characteristic of the alternating electromagnetic field are consistent with the alternating current of the exciting coil;
the alternating oscillation damping electromagnetic field of random sequence generated around the ferrite magnetic core ring is a pair of pairs of randomly generated electromagnetic field pulse sequences, each pair of electromagnetic field pulses is composed of a forward oscillation damping electromagnetic field and a reverse oscillation damping electromagnetic field, and the time interval is arranged between the pairs of the alternating oscillation damping electromagnetic field pulse sequences.
Preferably, the ferrite magnetic core ring is formed by connecting a plurality of ferrite strip-shaped magnetic cores end to form a ring, and two adjacent ferrite strip-shaped magnetic cores are rotatably connected; the exciting coil and the detecting coil are wound on one ferrite strip-shaped magnetic core in advance.
More preferably, both ends of the ferrite strip-shaped magnetic core are subjected to arc chamfering treatment.
Preferably, the alternating electromagnetic field working circuit and the alternating electromagnetic field driving circuit are externally packaged by a metal shell.
Preferably, the excitation coil and the detection coil are externally encapsulated by a plastic housing.
The utility model discloses a theory of operation is: installing the ferrite magnetic core ring close to the water flow pipeline, wherein the annular surface of the ferrite magnetic core ring is vertical to the water flow pipeline and is closely fixed;
the alternating electromagnetic field working circuit and the alternating electromagnetic field driving circuit generate random pulse sequences, so that the exciting coil obtains alternating currents of forward oscillation attenuation and reverse oscillation attenuation, and an alternating oscillation attenuation electromagnetic field of the random sequences is generated around the ferrite magnetic core ring;
under the action of the alternating oscillation attenuation electromagnetic field, polar water molecules flowing through the water flow pipeline and calcium and magnesium ions in the water flow system are continuously and randomly excited to oscillate in the water flow direction and are spread along with the water flow, weak magnetic particles obtain vibration energy in the circumferential direction, and positive and negative ion roots in the flow have a reverse vibration trend under the action of Lorentz force; the effect is stronger closer to the tube wall, calcium and magnesium ions with additional microcosmic oscillation kinetic energy are not easy to deposit on the tube wall, the activity of polar water molecules excited to oscillate is enhanced, molecular chains are broken, water molecule groups become small, the dissolving capacity of the calcium and magnesium ions is greatly improved, and positive and negative ion roots are difficult to combine due to the reverse departure tendency under the action of Lorentz force; polar water molecules subjected to excitation oscillation continuously permeate and carry out original scale molecules or scale microcrystals, so that the scale is gradually loosened and falls off, and the purposes of scale inhibition and scale removal are achieved;
the detection coil induces the state and the strength of the alternating oscillating magnetic field of the ferrite magnetic core ring for field indication or remote report.
The device provided by the utility model overcomes the defects of the prior art, has the functions of scale inhibition and scale removal, can greatly inhibit the formation and deposition of scale under the comprehensive action of the oscillation attenuation alternating electromagnetic field, achieves the purposes of scale inhibition and scale removal, has obvious effect and adjustable parameters, does not have chemical addition, and is green and environment-friendly; the method can be suitable for physical scale treatment of different water flow systems, and is suitable for the technical field of water treatment of industrial cooling circulating water and industrial and civil water supply and drainage.
Drawings
FIG. 1 is a schematic circuit diagram of the scale inhibition and scale removal device based on the random pulse sequence alternating electromagnetic field provided by the utility model;
FIG. 2 is a schematic view of the magnetic core ring assembly of the scale inhibition and scale removal device based on the random pulse sequence alternating electromagnetic field provided by the present invention;
FIG. 3 is an installation schematic diagram of a scale inhibition and removal device based on a random pulse sequence alternating electromagnetic field.
Detailed Description
Fig. 1 is the utility model provides a scale inhibition scale removal device based on random pulse sequence alternating electromagnetic field's circuit schematic diagram, scale inhibition scale removal device based on random pulse sequence alternating electromagnetic field constitute by parts such as ferrite core ring 1 that is used for constituting the annular magnetic circuit, the excitation coil 2 that is used for the excitation to produce alternating magnetic field on ferrite core ring 1, the detection coil 3 that is used for detecting oscillation information on ferrite core ring 1, alternating electromagnetic field working circuit and alternating electromagnetic field drive circuit for producing random pulse sequence.
The alternating electromagnetic field working circuit consists of a working power supply 4, a microprocessing and computing unit MCU5 and a random square wave pulse sequence shaping and output circuit 6, wherein the working power supply 4, the microprocessing and computing unit MCU5 and the random square wave pulse sequence shaping and output circuit 6 are sequentially connected.
The alternating electromagnetic field driving circuit is composed of a half-bridge driving module 8, an oscillation driving power supply 9, a first driving transistor 101, a second driving transistor 102, a capacitor 12 and an impedance matching transformer 13. The half-bridge driving module 8 is connected with the base electrode and the emitter electrode of the first driving transistor 101, and the collector electrode of the first driving transistor 101 is connected with the oscillation driving power supply 9; the half-bridge driving module 8 is further connected to the base and the collector of the second driving transistor 102, and the emitter of the second driving transistor 102 is grounded. The emitter of the first driving transistor 101 and the collector of the second driving transistor 102 are both connected to one end of a primary inductor 11 of the impedance matching transformer 13, the other end of the primary inductor 11 is connected to one end of a capacitor 12, and the other end of the capacitor 12 is grounded; two ends of the secondary inductor of the impedance matching transformer 13 are connected to two ends of the exciting coil 2, respectively. One end of the detection coil 3 is connected with one end of the rectifying module 14, the other end of the detection coil 3 is grounded, the other end of the rectifying module 14 is connected with one end of the voltage division module 15, and the other end of the voltage division module 15 is connected with the microprocessing and computing unit MCU 5.
The primary inductor 11 of the impedance matching transformer 13 is connected in series with the capacitor 12 to form an LC series oscillating circuit.
The working power supply 4 provides a 5V TTL level working power supply and a working power supply required by the 10-15V half-bridge driving module 8, and the oscillation driving power supply 9 provides a direct current voltage in a range of 12-300V for the first driving transistor 101 and the second driving transistor 102 according to the applied power requirement.
The microprocessing and computing unit MCU5 randomly generates pulse square wave sequences 7 by utilizing a random square wave pulse sequence shaping and output circuit 6 based on a random algorithm, each pulse square wave comprises a high level and a low level with adjustable duty ratio, and the time width T of the pulse square wavep16 is set according to 10-200 times of the sine oscillation period of the electromagnetic field pulse sequence 18, and the time delay t between the pulse square waves is setd17 are random within a range of 0.01 milliseconds to 10 milliseconds.
The random pulse square wave sequence 7 triggers the half-bridge driving module 8 to control the on and off of the driving transistor pair (the first driving transistor 101 and the second driving transistor 102), the high level of the square wave pulse turns on the first driving transistor 101 and turns off the second driving transistor 102, and the low level turns off the first driving transistor 101 and turns on the second driving transistor 102. Under the control of a random pulse square wave sequence 7, an oscillation driving power supply 9 randomly charges and discharges a capacitor 12 of an LC series oscillation circuit, a loop conduction equivalent resistance is very small to meet an underdamped oscillation condition, a pair of forward oscillation attenuation and reverse oscillation attenuation alternating voltages are randomly obtained on a primary side inductor 11 of an impedance matching transformer 13, an attenuation time constant is related to an equivalent conduction resistance R and an equivalent inductance L of the loop, an oscillation frequency is related to an equivalent inductance L, a capacitance C and an attenuation time constant, and circuit parameters are selected to enable an oscillation frequency to be within a range of 50 kHz to 1000 kHz.
A pair of forward oscillation attenuation and reverse oscillation attenuation alternating voltages randomly obtained on the primary side inductance 11 enable the exciting coil 2 wound on the ferrite magnetic core ring 1 to obtain forward oscillation attenuation and reverse oscillation attenuation alternating currents with the maximum current amplitude through the secondary side inductance of the impedance matching transformer 13. Thus, a nearly circular ring-shaped forward oscillation damped and reverse oscillation damped alternating magnetic field of the maximum magnetic induction amplitude is generated in the ferrite core ring 1. According to Maxwell's equation, the alternating oscillation attenuation magnetic field can be excited to generate an alternating oscillation attenuation electric field, the alternating electric field and the alternating magnetic field are mutually excited to generate an alternating electromagnetic field, and the oscillation frequency, the attenuation characteristic and the random characteristic of the alternating electromagnetic field are consistent with the alternating current of the exciting coil.
Thus, the randomly sequenced alternating oscillation-damped electromagnetic field generated around the ferrite core ring 1 is a pair of randomly generated electromagnetic field pulse sequences 18, each pair of electromagnetic field pulses consisting of a forward oscillation-damped electromagnetic field and a reverse oscillation-damped electromagnetic field. The pairs of alternating oscillating decaying electromagnetic field pulse trains have a time interval therebetween that is random, the random time being limited to a range of 0.01 milliseconds to 10 milliseconds. The alternating oscillating signal is a sine wave with attenuated amplitude and frequency range of 50 kHz to 1000 kHz.
Specifically, the random square wave pulse sequence shaping and outputting circuit 6, the half-bridge driving module 8, the rectifying module 14 and the voltage dividing module 15 may all adopt the well-known technical solutions in the prior art, which are known to those skilled in the art and will not be described herein again.
Referring to fig. 2, the ferrite core ring 1 is formed by connecting a plurality of ferrite strip cores 19 end to form an approximately circular ring shape. Both ends of each ferrite strip-shaped magnetic core 19 are provided with through holes 21, the end through holes 21 of two adjacent ferrite strip-shaped magnetic cores 19 are overlapped and connected by passing through the overlapped through holes 21 through nylon hexagon screws 27, and the two connected ferrite strip-shaped magnetic cores 19 can rotate around the nylon hexagon screws 27.
When in use, a plurality of ferrite strip-shaped magnetic cores 19 are connected end to form an approximate annular shape to be sleeved on the outer wall 20 of the used water flow pipeline. An exciting coil 2 and a detecting coil 3 are wound on one ferrite strip-shaped magnetic core 19 in advance, and the exciting coil 2 and the detecting coil 3 are in butt joint with an alternating electromagnetic field working circuit and an alternating electromagnetic field driving circuit through connecting ports. Therefore, the original water flow pipeline does not need to be disassembled or damaged, and the device can be simply and conveniently installed on site.
As shown in fig. 3, when the ferrite core ring 1 is installed on site, the ferrite core ring is tightly attached to the water flow pipe 26 and is supplied with power by the mains supply through the cable 22, and the circular ring surface of the ferrite core ring 1 is perpendicular to and tightly attached to the water flow pipe 26 and is fixed by the nylon bandage 27. The alternating electromagnetic field working circuit and the alternating electromagnetic field driving circuit are packaged by a metal shell 23 and fixed on a water flow pipeline 26 by an annular metal binding band 24, and an exciting coil 2 and a detecting coil 3 wound on a ferrite magnetic core ring 1 are connected with the alternating electromagnetic field working circuit and the alternating electromagnetic field driving circuit and protected by a plastic shell 25.
The two ends of each ferrite strip-shaped magnetic core 19 are subjected to arc chamfering treatment. The number of the ferrite strip-shaped magnetic cores 19 is determined according to the diameter of the water flow pipeline. The annular ferrite core ring 1 can be composed of a single-layer core ring or a multi-layer core ring according to the magnitude of the magnetic field peak output power.
The structure of the ferrite magnetic core ring 1 enables an oscillation attenuation nearly annular alternating magnetic field to be generated along the circumference of the outer wall 20 of the water flow pipeline along the direction perpendicular to the water flow direction, the direction of the magnetic field along the circumference of the outer wall 20 of the water flow pipeline is perpendicular to the water flow direction near the outer wall 20 of the water flow pipeline, and the water flow direction near the outer wall 20 of the water flow pipeline where the ferrite magnetic core ring 1 is located is parallel to the tangential direction of the alternating electric field excited by the alternating magnetic field. For a metal pipe wall, the energy of an oscillation attenuation alternating electromagnetic field can be firstly converted into oscillation attenuation local eddy current, the alternating eddy current excites an alternating electromagnetic field again, the water flow direction near the pipe wall and the electromagnetic field direction still keep the relationship of being vertical to the magnetic field and being parallel to the electric field, but the acting energy of the alternating electromagnetic field is locally concentrated near the inner wall of the water flow pipeline at the position of the ferrite magnetic core ring 1, and is circularly and symmetrically distributed by taking the axis of the pipeline as the center, the weakest is at the center of the circle, and the strongest is positioned on the circumference near the inner wall of the water flow pipeline at.
The detection coil 3 induces the state and the strength of the alternating oscillating magnetic field of the ferrite magnetic core ring 1, the alternating oscillating magnetic field is sent to the microprocessing unit MCU5 after passing through the rectifying module 14 and the voltage dividing module 15, and the microprocessing unit MCU5 obtains oscillation information for field indication or remote report.
The utility model provides a scale inhibition scale removal device based on random pulse sequence alternating electromagnetic field uses the time, and the calcium magnesium plasma in the polarity hydrone of device and the water flow system of flowing through is constantly aroused the oscillation at random and is propagated along with rivers on the rivers direction, and weak magnetic particle obtains along vibration energy on the circumferencial direction, and positive and negative ion root in the flow receives the lorentz force effect and has the counter vibration trend. The more the actions are close to the tube wall, the stronger the actions are, the calcium magnesium plasma which obtains additional microcosmic oscillation kinetic energy is not easy to deposit to the tube wall, the activity of the polar water molecules which are excited to oscillate is enhanced, molecular chains are broken, water molecule groups become small, the dissolving capacity of the calcium magnesium plasma is greatly improved, and positive and negative ion roots are difficult to combine due to the reverse departure tendency under the action of Lorentz force. The polar water molecules which are excited to oscillate continuously permeate and carry out the original scale molecules or scale microcrystals, so that the scale is gradually loosened and falls off.
Therefore, under the comprehensive action of the oscillation attenuation alternating electromagnetic field, the formation and deposition of water scale are planned to be controlled, and the purposes of scale inhibition and scale removal are achieved.
The present invention will be described in detail with reference to the following examples.
Example one
The embodiment is used for a turbid circulating cooling water system of molten iron slag of certain steel in China. The scale pollution of the system is serious, the scale in the pipeline is hard like stone, the scale is thickened year by year, and the thickness of the scale reaches 60 mm before the device is installed.
The water flow pipeline 26 is a carbon steel pipe, the inner diameter DN is 250 mm, and the wall thickness is 10 mm.
30 rectangular ferrite strip-shaped magnetic cores 19 with the cross sections of 30 mm x 10 mm and the lengths of 100 mm are selected to form the annular ferrite magnetic core ring 1, through holes 21 are formed at two ends of each ferrite strip-shaped magnetic core 19, and the hole pitch is 82 mm.
The working power supply 4 provides a 5V TTL level working power supply and a working power supply required by the 12V half-bridge driving module 8, and the oscillation driving power supply 9 provides 100V direct-current voltage for the driving transistor pair.
The microprocessing unit MCU5 randomly generates a pulse square wave sequence 7 based on a random algorithm by using a random square wave pulse sequence shaping and output circuit 6, wherein each pulse square wave comprises a high level and a low level with adjustable duty ratio and a pulse square wave time width Tp16 are set according to 20 times the period of the sinusoidal oscillation of the electromagnetic field pulse train 18, the time delay t between successive square pulsesd17 are random within a range of 0.01 milliseconds to 10 milliseconds.
The random pulse square wave sequence 7 triggers the half-bridge driving module 8 to control the on-off of the driving transistor pair, a pair of forward oscillation attenuation and reverse oscillation attenuation alternating voltages are randomly obtained on the primary side inductor 11, and the oscillation frequency is 250 kHz.
The randomly sequenced alternating oscillation damping electromagnetic field generated in the vicinity of the ferrite core ring 1 is a pair of randomly generated electromagnetic field pulse sequences 18, each pair of electromagnetic field pulses consisting of a forward oscillation damping electromagnetic field and a reverse oscillation damping electromagnetic field. The pairs of alternating oscillating decaying electromagnetic field pulse trains have a time interval therebetween that is random, the random time being limited to a range of 0.01 milliseconds to 10 milliseconds. The alternating oscillating signal is a sine wave with attenuated amplitude and frequency of 250 kHz.
After the device of the embodiment is used for 145 days, the pipeline can be easily disassembled, the scale ring shape is integrally fallen along the circumference near the inner wall of the pipeline, after the device is used for seven months, the scale on the inner wall of the pipeline is loose, and the scale falls off like silt when being touched by hands, so that the effect is remarkable.
Example two
The embodiment is used for the circulating cooling water system of a 350 MW unit of a certain power group in China.
The water flow pipeline 26 is a carbon steel pipe with the inner diameter DN1800 mm.
72 rectangular ferrite strip-shaped magnetic cores 19 with the cross sections of 30 mm x 10 mm and the lengths of 100 mm are selected to form the annular ferrite magnetic core ring 1, through holes 21 are formed at two ends of each ferrite strip-shaped magnetic core 19, and the hole distance is 82 mm.
The working power supply 4 provides a 5V TTL level working power supply and a working power supply required by the 12V half-bridge driving module 8, and the oscillation driving power supply 9 provides 300V direct-current voltage for the driving transistor pair.
The microprocessing unit MCU5 randomly generates a pulse square wave sequence 7 by utilizing a random square wave pulse sequence shaping and output circuit 6 based on a random algorithm, each pulse square wave comprises a high level and a low level with adjustable duty ratio, and the time width T of the pulse square wavep16 are set according to 20 times the period of the sinusoidal oscillation of the electromagnetic field pulse train 18, the time delay t between successive square pulsesd17 are random within a range of 0.01 milliseconds to 10 milliseconds.
The random pulse square wave sequence 7 triggers the half-bridge driving module 8 to control the on-off of the driving transistor pair, a pair of forward oscillation attenuation and reverse oscillation attenuation alternating voltages are randomly obtained on the primary side inductor 11, and the oscillation frequency is 151 kHz.
The randomly sequenced alternating oscillation damping electromagnetic field generated in the vicinity of the ferrite core ring 1 is a pair of randomly generated electromagnetic field pulse sequences 18, each pair of electromagnetic field pulses consisting of a forward oscillation damping electromagnetic field and a reverse oscillation damping electromagnetic field. The pairs of alternating oscillating decaying electromagnetic field pulse trains have a time interval therebetween that is random, the random time being limited to a range of 0.01 milliseconds to 10 milliseconds. The alternating oscillating signal is a sine wave with attenuated amplitude and frequency of 151 kHz.
After the device is installed and operated for six months, the vacuum value is obviously improved by 1 kPa, the standard coal consumption is reduced by 2 g, and the cost is saved by 300 ten thousand yuan every year.
EXAMPLE III
The embodiment is used for the circulating cooling water system of a certain vinegar industry company in China.
The water flow pipeline 26 is a carbon steel pipe with the inner diameter DN150 mm.
8 rectangular ferrite strip-shaped magnetic cores 19 with the cross sections of 30 mm x 10 mm and the lengths of 100 mm are selected to form the annular ferrite magnetic core ring 1, through holes 21 are formed at two ends of each ferrite strip-shaped magnetic core 19, and the hole distance is 82 mm.
The working power supply 4 provides a 5V TTL level working power supply and a working power supply required by the 12V half-bridge driving module 8, and the oscillation driving power supply 9 provides 72V direct-current voltage for the driving transistor pair.
The microprocessing unit MCU5 randomly generates a pulse square wave sequence 7 based on a random algorithm by using a random square wave pulse sequence shaping and output circuit 6, wherein each pulse square wave comprises a high level and a low level with adjustable duty ratio and a pulse square wave time width Tp16 are set according to 30 times the period of the sinusoidal oscillation of the electromagnetic field pulse train 18, the time delay t between successive square pulses beingd17 are random within a range of 0.01 milliseconds to 10 milliseconds.
The random pulse square wave sequence 7 triggers the half-bridge driving module 8 to control the on-off of the driving transistor pair, a pair of forward oscillation attenuation and reverse oscillation attenuation alternating voltages are randomly obtained on the primary side inductor 11, and the oscillation frequency is 297 kHz.
The randomly sequenced alternating oscillation damping electromagnetic field generated in the vicinity of the ferrite core ring 1 is a pair of randomly generated electromagnetic field pulse sequences 18, each pair of electromagnetic field pulses consisting of a forward oscillation damping electromagnetic field and a reverse oscillation damping electromagnetic field. The pairs of alternating oscillating decaying electromagnetic field pulse trains have a time interval therebetween that is random, the random time being limited to a range of 0.01 milliseconds to 10 milliseconds. The alternating oscillating signal is a sine wave with attenuated amplitude and frequency of 297 kHz.
After the device is installed and operated for six months, hard scale of the spiral cooling equipment falls off or loosens, the loosened scale can be washed by high-pressure water, and the scale inhibition and scale removal effects are obvious.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be termed a second element, and, similarly, a second element may be termed a first element, without departing from the scope of example embodiments.
The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way and in any way, and it should be understood that modifications and additions may be made by those skilled in the art without departing from the method of the present invention, and such modifications and additions are also considered to be within the scope of the present invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above-disclosed technical content without departing from the spirit and scope of the present invention, and all such changes, modifications and evolutions are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.
Claims (7)
1. A scale inhibition and removal device based on a random pulse sequence alternating electromagnetic field is characterized by comprising:
a ferrite core ring (1) for forming a toroidal magnetic circuit;
the excitation coil (2) is wound on the ferrite magnetic core ring (1) and is used for exciting and generating an alternating magnetic field;
a detection coil (3) wound on the ferrite core ring (1) and used for detecting oscillation information;
an alternating electromagnetic field working circuit and an alternating electromagnetic field driving circuit for generating a random pulse sequence;
the exciting coil (2) is connected with the alternating electromagnetic field driving circuit, and the alternating electromagnetic field driving circuit is connected with the detecting coil (3) and the alternating electromagnetic field working circuit.
2. The scale inhibition and removal device based on the random pulse sequence alternating electromagnetic field as claimed in claim 1, which is characterized in that: the alternating electromagnetic field working circuit is formed by sequentially connecting a working power supply (4), a microprocessing and computing unit MCU (5) and a random square wave pulse sequence shaping and output circuit (6).
3. The scale inhibition and removal device based on the random pulse sequence alternating electromagnetic field as claimed in claim 2, characterized in that: the alternating electromagnetic field driving circuit comprises a half-bridge driving module (8), wherein the half-bridge driving module (8) is connected with the base electrode and the emitter electrode of a first driving transistor (101), and the collector electrode of the first driving transistor (101) is connected with an oscillation driving power supply (9); the half-bridge driving module (8) is also connected with the base electrode and the collector electrode of a second driving transistor (102), and the emitter electrode of the second driving transistor (102) is grounded; the emitter of the first driving transistor (101) and the collector of the second driving transistor (102) are both connected with one end of a primary inductor (11) of an impedance matching transformer (13), the other end of the primary inductor (11) is connected with one end of a capacitor (12), and the other end of the capacitor (12) is grounded; two ends of a secondary side inductor of the impedance matching transformer (13) are respectively connected with two ends of the exciting coil (2); one end of the detection coil (3) is connected with one end of the rectification module (14), the other end of the detection coil (3) is grounded, the other end of the rectification module (14) is connected with one end of the voltage division module (15), and the other end of the voltage division module (15) is connected with the microprocessing and calculation unit MCU (5).
4. The scale inhibition and removal device based on the random pulse sequence alternating electromagnetic field as claimed in claim 1, which is characterized in that: the ferrite magnetic core ring (1) is formed by connecting a plurality of ferrite strip-shaped magnetic cores (19) end to end into a ring, and two adjacent ferrite strip-shaped magnetic cores (19) are rotatably connected; the exciting coil (2) and the detecting coil (3) are wound on one ferrite strip-shaped magnetic core (19) in advance.
5. The scale inhibition and removal device based on the random pulse sequence alternating electromagnetic field as claimed in claim 4, characterized in that: and arc-shaped chamfering treatment is carried out on both ends of the ferrite strip-shaped magnetic core (19).
6. The scale inhibition and removal device based on the random pulse sequence alternating electromagnetic field as claimed in claim 1, which is characterized in that: the alternating electromagnetic field working circuit and the alternating electromagnetic field driving circuit are externally packaged by a metal shell (23).
7. The scale inhibition and removal device based on the random pulse sequence alternating electromagnetic field as claimed in claim 1, which is characterized in that: the excitation coil (2) and the detection coil (3) are externally encapsulated by a plastic housing (25).
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| CN201921723173.0U CN210656291U (en) | 2019-10-15 | 2019-10-15 | Scale inhibition and removal device based on random pulse sequence alternating electromagnetic field |
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| CN110563100A (en) * | 2019-10-15 | 2019-12-13 | 上海万森水处理有限公司 | Scale inhibition and scale removal device and method based on random pulse sequence alternating electromagnetic field |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110563100A (en) * | 2019-10-15 | 2019-12-13 | 上海万森水处理有限公司 | Scale inhibition and scale removal device and method based on random pulse sequence alternating electromagnetic field |
| CN110563100B (en) * | 2019-10-15 | 2023-10-27 | 上海万森低碳科技有限公司 | Scale inhibition and removal device and method based on random pulse sequence alternating electromagnetic field |
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