US2026062627A1PendingUtilityA1
Demulsification-dehydration method by using chaotic-frequency pulse group electric field
Assignee: UNIV CHONGQING TECH & BUSINESSPriority: Jun 16, 2021Filed: Nov 5, 2025Published: Mar 5, 2026
Est. expiryJun 16, 2041(~14.9 yrs left)· nominal 20-yr term from priority
C10G 2300/1007C10G 33/02
64
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Claims
Abstract
A demulsification-dehydration method by using a chaotic-frequency pulse group electric field, including: subjecting a waste oil emulsion to the chaotic-frequency pulse group electric field for demulsification and dehydration. The chaotic-frequency pulse group electric field includes a plurality of pulse electric field groups varying in pulse angular frequency. The pulse angular frequency of each pulse electric field group varies chaotically within a preset range. Each pulse electric field group includes a plurality of pulses of equal frequency, duty cycle and electric field intensity.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A demulsification-dehydration method by using a chaotic-frequency pulse group electric field, comprising:
(a) connecting a pulse power supply to an electric field demulsifier; and (b) applying, by the pulse power supply, the chaotic-frequency pulse group electric field sequentially to a waste oil emulsion in the electric field demulsifier for demulsification and dehydration; wherein the chaotic-frequency pulse group electric field comprises a plurality of pulse electric field groups varying in pulse angular frequency; pulse angular frequencies between the plurality of pulse electric field groups exhibit a non-repetitive chaotic variation within a preset range; and each of the plurality of pulse electric field groups comprises a plurality of pulses of equal frequency, duty cycle and electric field intensity; the non-repetitive chaotic variation is determined by equations expressed as:
ω
max
=
3.1452
γ
R
min
3
ρ
ω
min
=
3.4152
γ
R
max
3
ρ
ω
n
=
ω
max
ω
min
(
c
n
+
1
)
(
ω
max
-
ω
min
)
/
2
+
ω
min
,
n
=
1
,
2
,
…
and
c
n
+
1
=
1
-
2
c
n
2
,
n
=
1
,
2
,
…
(
-
1
<
c
1
<
1
)
;
wherein ω max is a maximum pulse angular frequency; ω min is a minimum pulse angular frequency; ρ is droplet density; R max is a particle size of a largest droplet in the waste oil emulsion; R min is a particle size of a smallest droplet in the waste oil emulsion; γ is an oil-water interfacial tension; ω n is a pulse angular frequency of a n th pulse electric field group; c n is a value of n th iteration of logistic map; and the preset range is ω min to ω max .
2 . The demulsification-dehydration method of claim 1 , wherein the number of the plurality of pulses in each of the plurality of pulse electric field groups is determined by equations expressed as:
d
2
χ
d
t
2
+
A
φ
(
χ
)
d
χ
d
t
+
B
f
(
χ
)
=
G
q
(
t
)
e
(
χ
)
A
=
4
μ
R
2
ρ
B
=
8
γ
R
3
ρ
and
G
=
4
ε
0
ε
2
E
2
R
2
ρ
;
wherein A is a resistance constant; B is an interfacial restoring force constant; G is an electric field excitation force constant; μ is a dynamic viscosity; ε 0 is a vacuum dielectric constant; ε 2 is a relative dielectric constant; E is an electric field intensity; γ is an oil-water interfacial tension; R is an initial droplet radius; ρ is a droplet density; χ is a droplet amplitude; q(t) is an electric field signal function, and expressed as
q
(
t
)
=
1
2
+
2
π
(
sin
ω
t
+
1
3
sin
3
ω
t
+
1
5
sin
5
ω
t
+
…
)
;
φ(χ) is a resistance nonlinear function; ƒ(χ) is an interfacial restoring force nonlinear function; e(χ) is an electric field excitation force nonlinear function; φ(χ)=0.92−2.1χ+1.17χ 2 ; ƒ(χ)=0.25χ−0.06χ 2 ; e(χ)=1.47−0.83χ+0.2χ 2 ; ω is an electric field angular frequency; and t is an electric field action time.
3 . The demulsification-dehydration method of claim 1 , wherein an electric field output sequence of the chaotic-frequency pulse group electric field is determined by an equation expressed as:
E
(
t
)
=
E
(
1
2
+
2
π
(
sin
(
ω
i
(
t
-
∑
i
=
1
n
-
1
k
2
π
ω
i
)
)
+
1
3
sin
(
3
ω
i
(
t
-
∑
i
=
1
n
-
1
k
2
π
ω
i
)
)
+
1
5
sin
(
5
ω
i
(
t
-
∑
i
=
1
n
-
1
k
2
π
ω
i
)
)
+
…
)
)
,
n
=
1
,
2
,
3
,
…
;
wherein ω i is an electric field angular frequency of an i th pulse electric field group; t is an electric field action time; and k is a number of pulses in each pulse electric field group.
4 . The demulsification-dehydration method of claim 1 , wherein in each of the plurality of pulse electric field groups, the plurality of pulses have a duty cycle of 0.5 and an electric field intensity of 100-500 kV/m.
5 . The demulsification-dehydration method of claim 1 , further comprising:
before the chaotic-frequency pulse group electric field is applied to the waste oil emulsion, controlling the waste oil emulsion to 40-50° C.; wherein the waste oil emulsion comprises 10-30% by weight of water, and has a kinematic viscosity of less than 65 mm 2 /s at 40° C.Join the waitlist — get patent alerts
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