Electromagnetic decontamination device based on three-dimensional Helmholtz coil

Abstract

The invention belongs to the technical field of scale inhibition and descaling, and particularly relates to an electromagnetic decontamination device based on a three-dimensional Helmholtz coil, which comprises a sine wave driving circuit, a pipeline and the three-dimensional Helmholtz coil sleeved at the center of the outer side of the pipeline, the sine wave driving circuit is connected with the three-dimensional Helmholtz coil, and the three-dimensional Helmholtz coil is connected with the pipeline. The three-dimensional Helmholtz coil is used for changing the magnitude of driving currents passing through the X direction, the Y direction and the Z direction of the three-dimensional Helmholtz coil, so that the three-dimensional Helmholtz coil generates a three-dimensional space magnetic field which is globally uniform and controllable in size and direction. The three-dimensional space magnetic field completely covers fluid in the range of the coil, deformation and vibration effects are generated on large water molecules, hydrogen bonds are bent and broken, the large water molecules are promoted to be dissociated into high-activity small molecules, and the dissolving capacity of water to scale component substances such as calcium carbonate is enhanced. Meanwhile, scale forming component ions can form new crystal nucleuses wrapped by active water molecules, the possibility of forming large particles is reduced, and direct scaling on the wall surface is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of scale inhibition and descaling, and in particular relates to an electromagnetic decontamination device based on a three-dimensional Helmholtz coil. Background Art

[0002] With the rapid development of my country's industry, transportation pipeline systems are becoming increasingly important in water treatment, chemical industry, petroleum and other fields. It is well known that the oil, natural gas and water and other media transported by industrial pipelines contain a variety of different substances. Therefore, after the inner wall of the pipeline is in contact with the fluid for a long time, scaling problems will occur. Pipeline scaling will not only increase resistance and energy consumption, but also cause pipeline deformation and bursting. In addition, scaling will also pollute the products in the pipeline, seriously affecting the safety of people and property.

[0003] In view of the harm caused by scaling in pipelines, it is particularly important to develop an efficient, environmentally friendly and economically feasible scaling removal technology. Although traditional mechanical and chemical scaling removal methods can remove scale in pipelines to a certain extent, they have problems such as the need for downtime and waiting and serious environmental pollution, making it difficult for traditional methods to meet the needs of modern industry for efficient and environmentally friendly scaling removal technologies. Electromagnetic scaling removal technology is a new type of scaling removal technology with high efficiency, low waste and low pollution. It changes the activity of water and the physical and chemical properties of scale through the action of electromagnetic fields, making scale easy to dissolve and fall off. However, there are some limitations to the effect of a single direction electromagnetic field on water molecules and scale. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an electromagnetic decontamination device based on a three-dimensional Helmholtz coil.

[0005] In order to achieve the above object, the technical solution specifically adopted by the present invention is as follows:

[0006] An electromagnetic decontamination device based on a three-dimensional Helmholtz coil comprises a sinusoidal wave drive circuit, a pipeline and a three-dimensional Helmholtz coil sleeved at the center of the outer side of the pipeline. The sinusoidal wave drive circuit is connected to the three-dimensional Helmholtz coil and is used to change the current passing through the three-dimensional Helmholtz coil so that the three-dimensional Helmholtz coil generates a three-dimensional magnetic field with global uniform intensity and controllable size and direction.

[0007] In an electromagnetic decontamination device based on a three-dimensional Helmholtz coil of the present invention, the three-dimensional Helmholtz coil includes a pair of large coils in the X direction, a pair of middle coils in the Z direction, and a pair of small coils in the Y direction. The axes of the large coils in the X direction, the middle coils in the Z direction, and the small coils in the Y direction intersect. The large coils in the X direction and the middle coils in the Z direction, and the middle coils in the Z direction and the small coils in the Y direction are connected by limiting screw holes and limiting bolts. Specifically, the pair of large coils in the X direction, the pair of middle coils in the Z direction, and the pair of small coils in the Y direction are all provided with limiting screw holes with internal threads. The limiting bolts penetrate the limiting screw holes and are connected to the limiting screw holes by threads. The number of the limiting screw holes is 8, and the hole diameters are all 3 mm.

[0008] In an electromagnetic decontamination device based on a three-dimensional Helmholtz coil of the present invention, the distance between the X-direction large coils is the coil radius of the X-direction large coil, the distance between the Z-direction middle coils is the coil radius of the Z-direction middle coil, and the distance between the Y-direction small coils is the coil radius of the Y-direction small coil; the axes of the X-direction large coil and the Z-direction middle coil are in the horizontal direction and perpendicular to each other, and the coils in the X-direction large coil and the Z-direction middle coil are arranged face to face and coaxially; the axis of the Y-direction small coil is in the vertical direction, and the Y-direction small coil is arranged between the X-direction large coil and the Z-direction middle coil.

[0009] In an electromagnetic decontamination device based on a three-dimensional Helmholtz coil of the present invention, the sine wave drive circuit includes a main control circuit, a rectifier circuit, a drive circuit, a chopper circuit and a sine wave inverter circuit. The rectifier circuit converts the industrial frequency AC power inputted at 50Hz and 220V into DC power, and then the DC power is inverted into a sine wave AC signal required by the three-dimensional Helmholtz coil through the sine wave inverter circuit. The drive circuit and the chopper circuit are both electrically connected to the sine wave inverter circuit, and the sine wave inverter circuit is electrically connected to the three-dimensional Helmholtz coil.

[0010] In an electromagnetic decontamination device based on a three-dimensional Helmholtz coil of the present invention, the sinusoidal wave drive circuit adjusts the current passing through the three-dimensional Helmholtz coil so that the coil currents in the three directions of X, Y, and Z satisfy:

[0011]

[0012] I z =I0sinγsinωt;

[0013] Among them, I x is the large coil current in the X direction, I y is the current of the small coil in the Y direction, I z is the coil current in the Z direction, α, β, γ are the angles between the magnetic field direction vector B and the three coordinate axes of X, Y, and Z respectively; and the angles α, β, γ between the magnetic field direction vector B and the three coordinate axes of X, Y, and Z satisfy the following relationship:

[0014]

[0015] At this time, a uniform spatial magnetic field rotating along any axis in space will be generated within the range of the three-dimensional Helmholtz coil.

[0016] The present invention has the following characteristics and beneficial effects:

[0017] The electromagnetic decontamination device based on the three-dimensional Helmholtz coil of the present invention can generate a uniform spatial magnetic field within the coil range that can rotate along any axis in space by adjusting the current amplitude, frequency and phase passing through the three-dimensional Helmholtz coil, so that the electromagnetic field fully covers the fluid within the coil range. The change in the direction of the electromagnetic field will intensify the disturbance of water molecules and ions, enhance the activity of water molecules, prevent the growth and combination of scale crystals, and enhance the dissolution ability of water flow for minerals such as calcium carbonate, thereby playing a role in scale prevention and descaling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0019] Figure 1 A schematic diagram of an electromagnetic decontamination device based on a three-dimensional Helmholtz coil according to an embodiment of the present invention;

[0020] Figure 2 is a module block diagram of a sinusoidal wave driving circuit in an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of a spatial magnetic field generated by a three-dimensional Helmholtz coil in an embodiment of the present invention;

[0022] In the figure: 1. Three-dimensional Helmholtz coil; 101. Large coil in X direction; 102. Middle coil in Z direction; 103. Small coil in Y direction; 104. Limit screw hole; 2. Sine wave drive circuit; 201. Main control circuit; 202. Rectification circuit; 203. Drive circuit; 204. Chopper circuit; 205. Sine wave inverter circuit; 3. Pipeline; 301. Flange screw hole. DETAILED DESCRIPTION

[0023] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0024] In order to solve the problem of the limitation of the effect of the existing electromagnetic descaling device on water molecules and scale by using a single direction-invariant electromagnetic field, the present invention provides an electromagnetic descaling device based on a three-dimensional Helmholtz coil, such as Figure 3 As shown, it can generate a uniform spatial magnetic field within the range of the three-dimensional Helmholtz coil that can rotate along any axis in space, thereby achieving scale prevention and descaling in the pipeline. Figure 1 As shown, the electromagnetic decontamination device includes a three-dimensional Helmholtz coil 1, a sinusoidal wave drive circuit 2 and a pipeline 3, wherein the three-dimensional Helmholtz coil 1 is sleeved outside the pipeline 3 and located at the center of the pipeline 3; the sinusoidal wave drive circuit 2 is connected to the three-dimensional Helmholtz coil 1, and is used to change the current passing through the three-dimensional Helmholtz coil 1, so that the three-dimensional Helmholtz coil 1 generates a three-dimensional space magnetic field with global uniform intensity and controllable size and direction, and the electromagnetic field in any direction of space can be realized by changing the size of the driving current in the three directions of X, Y, and Z of the three-dimensional Helmholtz coil, thereby causing deformation and vibration effects on large groups of water molecules, causing bending and breaking of hydrogen bonds, promoting the dissociation of large groups of water molecules into small molecules with high activity, and enhancing the solubility of water for scale components such as calcium carbonate; at the same time, the change in the direction of the electromagnetic field will intensify the disturbance of water molecules and ions, enhance the activity of water molecules, and the scaling component ions will form new crystal nuclei wrapped by active water molecules, reducing the possibility of forming large particles, thereby reducing direct scaling on the wall surface.

[0025] Further, the three-dimensional Helmholtz coil 1 includes three groups of Helmholtz coils with intersecting axes, and the three groups of Helmholtz coils with intersecting axes include a pair of X-direction large coils 101, a pair of Z-direction middle coils 102, and a pair of Y-direction small coils 103. The pair of X-direction large coils 101, the pair of Z-direction middle coils 102, and the pair of Y-direction small coils 103 are all provided with limiting screw holes 104 with internal threads, and the X-direction large coil 101 and the Z-direction middle coil 102, and the Z-direction middle coil 102 and the Y-direction small coil 103 are connected through limiting screw holes 104 and limiting bolts, and the limiting bolts penetrate the limiting screw holes and are connected to the limiting screw holes 104 through threads. In this embodiment, the number of the limiting screw holes 104 is 8, and the apertures are all 3 mm.

[0026] Furthermore, the radius of each pair of coils is equal, and the distance between the coils is equal to the coil radius, the coils are parallel and coaxially installed, and the coil currents are in the same direction. In this embodiment, the distance between the X-direction large coils 101 is the coil radius of the X-direction large coil 101, the distance between the Z-direction middle coils 102 is the coil radius of the Z-direction middle coil 102, and the distance between the Y-direction small coils 103 is the coil radius of the Y-direction small coil 103. The axes of the X-direction large coil 101 and the Z-direction middle coil 102 are in the horizontal direction and perpendicular to each other, and the coils in the X-direction large coil 101 and the Z-direction middle coil 102 are coaxially arranged face to face; the axis of the Y-direction small coil 103 is in the vertical direction, and the Y-direction small coil 103 is arranged between the X-direction large coil 101 and the Z-direction middle coil 102. According to the right-hand rule, the X-direction large coil pair 101 generates a uniform magnetic field along the x-axis direction within the coil range, the Z-direction coil pair 102 generates a uniform magnetic field along the z-axis direction within the coil range, and the Y-direction large coil pair 103 generates a uniform magnetic field along the y-axis direction within the coil range.

[0027] Furthermore, if Figure 2 As shown, the sinusoidal wave drive circuit 2 includes a main control circuit 201, a rectifier circuit 202, a drive circuit 203, a chopper circuit 204 and a sinusoidal wave inverter circuit 205. The drive circuit 203 and the chopper circuit 204 are electrically connected to the sinusoidal wave inverter circuit 205. The sinusoidal wave inverter circuit 205 is electrically connected to the three-dimensional Helmholtz coil 1. The rectifier circuit 202 converts the 50Hz, 220V input industrial frequency AC power into DC power, and then inverts the DC power into the sinusoidal wave AC signal required by the three-dimensional Helmholtz coil 1 through the sinusoidal wave inverter circuit 205.

[0028] In this embodiment, the sinusoidal wave inverter circuit preferably adopts a single-phase half-bridge inverter circuit, which has strong stability, simple circuit structure and control method, and strong phase and amplitude adjustability.

[0029] Furthermore, the sinusoidal wave driving circuit 2 adjusts the current passing through the three-dimensional Helmholtz coil so that the coil currents in the three directions of X, Y, and Z satisfy:

[0030]

[0031] I z =I0sinγsinωt;

[0032] Among them, I x is the large coil current in the X direction, I y is the current of the small coil in the Y direction, I z is the coil current in the Z direction, α, β, γ are the angles between the magnetic field direction vector B and the three coordinate axes of X, Y, and Z respectively; and the angles α, β, γ between the magnetic field direction vector B and the three coordinate axes of X, Y, and Z satisfy the following relationship:

[0033]

[0034] At this time, a uniform spatial magnetic field rotating along any axis in space will be generated within the range of the three-dimensional Helmholtz coil.

[0035] In this embodiment, the main control circuit 201 can set the working mode in the descaling process, including the following three modes:

[0036] S1, control the coil current so that one pair of coils works alone, and the inverter circuit generates a sine wave signal:

[0037]

[0038] Where: ω is the angular frequency, ψ is the current phase.

[0039] like Figure 3 As shown, when the large coil in the X direction works alone, the alternating current will make the magnetic field generated parallel to the direction of fluid flow, that is, the x-axis direction. When the middle coil in the Z direction works alone, the alternating current will make the magnetic field generated perpendicular to the direction of fluid flow, that is, the z-axis direction. When the small coil in the Y direction works alone, the alternating current will make the magnetic field generated reversely perpendicular to the direction of fluid flow, that is, the y-axis direction. At this time, the alternating electromagnetic field will cause the ions and water molecules dissolved in the fluid to oscillate in one direction.

[0040] S2, control the coil current so that two pairs of coils work separately. When the large coil in the X direction and the small coil in the Y direction work, the direction of the magnetic field generated is parallel to the xoy plane and rotates along the z axis; when the large coil in the X direction and the middle coil in the Z direction work, the direction of the magnetic field generated is parallel to the xoz plane and rotates along the y axis; when the small coil in the Y direction and the middle coil in the Z direction work, the direction of the magnetic field generated is parallel to the yoz plane and rotates along the x axis;

[0041] S3. Three pairs of coils work simultaneously, generating a magnetic field that rotates along any axis in space.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An electromagnetic decontamination device based on a three-dimensional Helmholtz coil, characterized in that: The invention comprises a sinusoidal wave drive circuit (2), a pipeline (3), and a three-dimensional Helmholtz coil (1) sleeved at the center of the outer side of the pipeline (3); the sinusoidal wave drive circuit (2) is connected to the three-dimensional Helmholtz coil (1) and is used to change the current passing through the three-dimensional Helmholtz coil (1), so that the three-dimensional Helmholtz coil (1) generates a three-dimensional magnetic field with global uniform intensity and controllable magnitude and direction.

2. The electromagnetic decontamination device based on a three-dimensional Helmholtz coil according to claim 1, characterized in that: The three-dimensional Helmholtz coil (1) comprises a pair of X-direction large coils (101), a pair of Z-direction middle coils (102) and a pair of Y-direction small coils (103); the axes of the pair of X-direction large coils (101), the pair of Z-direction middle coils (102) and the pair of Y-direction small coils (103) intersect; the X-direction large coil (101) and the Z-direction middle coil (102), and the Z-direction middle coil (102) and the Y-direction small coil (103) are connected via limiting screw holes (104) and limiting bolts.

3. The electromagnetic decontamination device based on a three-dimensional Helmholtz coil according to claim 2, characterized in that: The distance between the X-direction large coils (101) is the coil radius of the X-direction large coil (101), the distance between the Z-direction middle coils (102) is the coil radius of the Z-direction middle coil (102), and the distance between the Y-direction small coils (103) is the coil radius of the Y-direction small coil (103).

4. The electromagnetic decontamination device based on a three-dimensional Helmholtz coil according to claim 2, characterized in that: The pair of X-direction large coils (101), the pair of Z-direction middle coils (102) and the pair of Y-direction small coils (103) are all provided with limiting screw holes (104) with internal threads. The number of the limiting screw holes (104) is 8 and the hole diameters are all 3 mm.

5. The electromagnetic decontamination device based on a three-dimensional Helmholtz coil according to claim 2, characterized in that: The axes of the X-direction large coil (101) and the Z-direction middle coil (102) are in the horizontal direction and perpendicular to each other, and the coils in the X-direction large coil (101) and the Z-direction middle coil (102) are arranged face to face and coaxially; the axes of the Y-direction small coil (103) are in the vertical direction, and the Y-direction small coil (103) is arranged between the X-direction large coil (101) and the Z-direction middle coil (102).

6. The electromagnetic decontamination device based on a three-dimensional Helmholtz coil according to claim 1, characterized in that: The sinusoidal wave drive circuit (2) comprises a main control circuit (201), a rectifier circuit (202), a drive circuit (203), a chopper circuit (204) and a sinusoidal wave inverter circuit (205). The rectifier circuit (202) converts the industrial frequency alternating current (AC) input at 50 Hz and 220 V into direct current, and then inverts the direct current into a sinusoidal wave AC signal required by the three-dimensional Helmholtz coil (1) through the sinusoidal wave inverter circuit (205).

7. The electromagnetic decontamination device based on a three-dimensional Helmholtz coil according to claim 6, characterized in that: The driving circuit (203) and the chopping circuit (204) are both electrically connected to a sine wave inverter circuit (205), and the sine wave inverter circuit (205) is electrically connected to a three-dimensional Helmholtz coil (1).

8. The electromagnetic decontamination device based on a three-dimensional Helmholtz coil according to claim 1, characterized in that: The sinusoidal wave drive circuit (2) adjusts the current passing through the three-dimensional Helmholtz coil so that the coil currents in the three directions of X, Y and Z satisfy: I z =I0sinγsinωt; Among them, I x is the large coil current in the X direction, I y is the current of the small coil in the Y direction, I z is the coil current in the Z direction, α, β, γ are the angles between the magnetic field direction vector B and the three coordinate axes of X, Y, and Z respectively; At this time, a uniform spatial magnetic field rotating along any axis in space will be generated within the range of the three-dimensional Helmholtz coil.

9. The electromagnetic decontamination device based on a three-dimensional Helmholtz coil according to claim 8, characterized in that: The angles α, β, γ between the magnetic field direction vector B and the three coordinate axes X, Y, and Z satisfy the following relationship:

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