CN101254968A - Low-frequency high-gradient magnetic field scale inhibiting cleaner - Google Patents

Abstract

The invention belongs to a low frequency and high gradient magnetic field scale-buster, which belongs to the scale-buster manufacturing field. The invention is characterized in that a solenoid is made by coiling copper wire, magnetized steel wool with higher magnetic inductivity is arranged inside the solenoid coil, and a low frequency power supply is connected with the magnetized steel wool to make the scale-buster. The inventive steel wool is positioned to be perpendicular to the magnetic lineation, a high gradient magnetic field with 100 to 1000T/m can be generated near the steel wool and is perpendicular to the magnetized steel wool. The scale-buster has the advantages that the structure is simple, the installation and the operation are convenient, the occupied space is small, the cost is low, no secondary pollution exists, and the energy-saving and consumption-reducing and scale inhibition effects are good. The scale-buster can be applied to the industrial cycle cooling water, boilers and the pipeline thereof, and other systems, and belongs to the green environmental protection technology.

Description

Low-frequency high-gradient magnetic field scale inhibiting cleaner

One, technical field

The present invention relates to a kind of low-frequency high-gradient magnetic field scale inhibiting cleaner, be applied to industrial circulating cooling water, systems such as boiler and pipeline thereof belong to scale inhibiting cleaner and make the field.

Two, background technology

In many process waters, particularly scale problems such as industrial circulating cooling water, boiler feed water, pipeline are serious, influence its work-ing life at present.Tradition anti-scale descaling method generally is that Xiang Shuili adds Scale inhibitors, and this method is the cost height not only, and can produce secondary pollution.

Three, summary of the invention

The object of the present invention is to provide a kind of anti-scale descaling, do not produce secondary pollution, cost is low, energy-saving and cost-reducing low-frequency high-gradient magnetic field scale inhibiting cleaner.

The technical problem that the present invention solves is: the built-in magnetic conduction steel wool of solenoid coil, solenoid coil is connected with low-frequency power.

The vertical magnetic line of force of magnetic conduction steel wool is placed.

The gradient of magnetic conduction steel wool is 100-1000T/m.

Relative magnetic permeability is μ _r=2000-6000.

Performance: B ₂₀=12200Gs, B ₁₀₀=145000Gs, Hc＜2 oersteds, B _r=7900Gs.

Solenoid coil is by the copper cash coiling.

Wire-wound system solenoid design magnetic field: 200Gs-2000Gs.

The main body of low-frequency high-gradient scale inhibiting cleaner of the present invention is the built-in magnetic conduction steel wool of solenoid coil, the magnetic permeability of steel wool is very high, and (it is fast to be characterized in magnetizing, it is also fast to demagnetize), pass to low-frequency current, near steel wool, can produce the high-gradient magnetic field of direction perpendicular to the magnetic conduction steel wool, low-frequency high-gradient magnetic field affacts on the ion or ionic group of water body inside, changes the crystal habit of dirt, reaches the anti-scale descaling purpose.Be characterized in that making method is simple, cost is low, and energy-saving and cost-reducing, it is little to take up room, and does not produce secondary pollution, belongs to green environmental protection technique.

Four, description of drawings

Fig. 1 is a cross-sectional schematic of the present invention.

Five, embodiment

The present invention adopts copper cash coiling solenoid coil 1, and the built-in magnetic conduction steel wool 2 of solenoid coil, solenoid coil 1 are serially connected on the power supply 3 of low frequency, and magnetic conduction steel wool 2 vertical magnetic line of force are placed.The central duct of solenoid coil 1 adopts non-magnetic pvc pipe, length 400-1500mm, and internal diameter is generally

The close circle coiling of copper cash is adopted in the outside in pvc pipe road, and it is fixed that the specification of copper cash is come according to the size of low-frequency power outward current.

Determine solenoid coil 1 number of turn according to following formula:

$n=\frac{2B}{{\mathrm{\&mu;}}_{0}I}{\left(\frac{\mathrm{<figure-callout\; id="2"\; label="l\; l"\; filenames="A20081008896700061.png"\; state="\{\{state\}\}">l</figure-callout>}}{\sqrt{l^{}}}\right)}^{-1}$

Wherein n is the number of turn of copper cash in the unit length, and I is the size of the watt current of low-frequency power output, and l is the length of solenoid coil (1), and r is the external diameter of pvc pipe, and B is the magnetic induction density of solenoid coil 1 central position.

Because n is very big, copper cash can not be entangled in one deck fully, utilize the external diameter of n and copper cash can draw the number of turn n of copper cash on every layer of unit length like this ₀, utilize n ₀Whether the magnetic induction density of each point meets the requirements of 0.02T～0.2T size on inverse solenoid coil 1 axis again.Calculation formula is as follows:

$B=\underset{i}{\mathrm{\&Sigma;}}\frac{{\mathrm{\&mu;}}_0{n}_{0}I}{2}[\frac{\mathrm{<figure-callout\; id="2"\; label="z\; z"\; filenames="A20081008896700061.png"\; state="\{\{state\}\}">z</figure-callout>}}{\sqrt{z^{}}}+\frac{l-z}{\sqrt{{(l-z)}^2+r_i^2}}]$

The technical parameter of magnetic conduction steel wool 2:

1) permeability height can produce high-gradient magnetic field near the magnetic conduction steel wool 2, and relative magnetic permeability is μ _r=2000-6000

2) magnetic property: B ₂₀=12200Gs, B ₁₀₀=145000Gs, Hc＜2 oersteds, B _r=7900Gs, coercive force is little, and residual magnetization is low, and demagnetization is fast, is easy to after the demagnetization sorption under the flushing of the impurity on the medium

3) mechanical property:

Intensity and plasticity: δ _b=50kg/mm ²-55kg/mm ², HRB=75-79, δ=30%-35%

The elasticity of magnetic conduction steel wool 2: carried out positive and negative irrigation tests 20-30 time through simulation real work situation, do not seen magnetic conduction steel wool 2 pure disconnected and batt because of compressing irrecoverable phenomenon.

4) corrosion resistance nature of material: through air, water and 10 kinds of corrosive medium tests such as three acid, three alkali, 90% reaches corrosion A grade standard.

5) diameter: 15 μ m-20 μ m, specific surface area: 5～10m ²/ kg,

6) magnetic conduction steel wool 2 filling ratios are 5%-8%, and porosity is big, and resistance is little, so that current pass through, magnetic conduction steel wool 2 vertical magnetic line of force are placed, and the steel wool filling ratio is 5%-8%, the very high (μ of magnetic conduction steel wool 2 magnetic permeabilities _r=2000-6000), near steel wool, can produce direction perpendicular to the magnetic conduction steel wool, gradient is the high-gradient magnetic field of 800T/m, low-frequency high-gradient magnetic field affacts on the ion or ionic group of water body inside, changes the crystal habit of dirt, reaches the anti-scale descaling purpose.The technical parameter of copper cash coiling solenoid coil 1:

1) design magnetic field: 200Gs-2000Gs

2) copper wire diameter: 0.9mm-1.0mm

3) resistance R: record resistance R by the comparison bridge method

4) impedance Z: use placed in-line method, record both end voltage U, electric current A.Can get impedance Z=U/A

5) induction reactance X:X=(Z ²-R ²) ^1/2

6) inductance coefficent L:L=X/2 π f (f is a supply frequency)

The technical parameter of low-frequency power 3:

1) frequency is that 5-50Hz is adjustable continuously

2) electric current is 3-20A

Claims (7)

1, low-frequency high-gradient magnetic field scale inhibiting scale-proof apparatus is characterized in that: the built-in magnetic conduction steel wool of solenoid coil (1) (2), solenoid coil (1) is connected with low-frequency power (3).

2, low-frequency high-gradient magnetic field scale inhibiting scale-proof apparatus according to claim 1 is characterized in that: the vertical magnetic line of force of magnetic conduction steel wool (2) is placed.

3, low-frequency high-gradient magnetic field scale inhibiting scale-proof apparatus according to claim 2 is characterized in that: the gradient of magnetic conduction steel wool (2) is 100-1000T/m.

4, according to claim 1 or 3 described low-frequency high-gradient magnetic field scale inhibiting scale-proof apparatus, it is characterized in that: the relative magnetic permeability of magnetic conduction steel wool (2) is μ _r=2000-6000.

5, low-frequency high-gradient magnetic field scale inhibiting scale-proof apparatus according to claim 4 is characterized in that: magnetic property: B ₂₀=12200Gs, B ₁₀₀=145000Gs, Hc＜2 oersteds, B _r=7900Gs.

6, low-frequency high-gradient magnetic field scale inhibiting scale-proof apparatus according to claim 1 is characterized in that: solenoid coil (1) is by the copper cash coiling.

7, according to claim 1 or 6 described gradient magnetic scale inhibition scale-proof apparatus, it is characterized in that: the design magnetic field of copper cash coiling solenoid coil (1): 200Gs-2000Gs.

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