CN102970811B - Transmission line type impulse electric field corona discharge reactor and manufacture method - Google Patents
Transmission line type impulse electric field corona discharge reactor and manufacture method Download PDFInfo
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Abstract
The present invention relates to corona discharge reactor field, particularly relate to a kind of transmission line type impulse electric field corona discharge reactor and manufacture method.The structure capacitive amount that the present invention overcomes the impulse electric field corona discharge reactor that is applied to now industrial system intrinsic is large, the shortcoming of the impulse electric field of hundred nanosecond order pulse durations cannot be produced on reactor, a kind of transmission line type impulse electric field corona discharge reactor and manufacture method are provided, enable the pulse voltage that reactor feed-in pulse duration is shorter, reactor is set up larger impulse electric field strength, produces better desulphurization denitration and dust removing effects.According to high-field electrode total length L and every grade of high-field electrode length X, the present invention determines that N level high-field electrode head and the tail connect respectively by electrical cnnector.The present invention is mainly used in reactor design field.
Description
Technical field
The present invention relates to corona discharge reactor field, particularly relate to a kind of transmission line type impulse electric field corona discharge reactor and manufacture method
.
Background technology
Along with the high speed development of China's process of industrialization, the discharge capacity of organic exhaust gas more and more increases, such that State of Air pollution is continuous worsening becomes one of global ten overall situation problems at present.In the past traditional administering method mainly contains: absorption method, absorption process, combustion method, oxidizing process etc.Along with complicated, large discharge, the concentration high of pollutant composition, these technology all also exist that purification efficiency is low or operating cost is high or easily cause the shortcomings such as secondary pollution.Relative to traditional administering method, Low Temperature Plasma Treating technology receives much concern because of ultra-traditional technique.The mode producing low temperature plasma is more, comprises glow discharge, corona discharge, dielectric barrier discharge and radio frequency discharge etc.By practical application, it is the most extensive that corona discharge and dielectric barrier discharge are applied in waste gas pollution control and treatment field.The electric field of corona discharge pulse flue gas desulfurization and denitrification reactor itself has dedusting function simultaneously.Have device simple, operating cost is low, and harmful pollution is removed thoroughly, does not produce the advantages such as secondary pollution.
At present, the impulse electric field corona discharge reactor high-field electrode being applied to industrial system adopts parallel way to connect, its intrinsic structure capacitive amount reaches nanofarad up to a hundred, the form of expression is lumped parameter, and capacitance large like this makes the impulse electric field that cannot produce hundred nanosecond order pulse durations on reactor
.
Summary of the invention
technical problem to be solved by this invention is:the structure capacitive amount overcoming the impulse electric field corona discharge reactor that is applied to now industrial system intrinsic is large, the shortcoming of the impulse electric field of hundred nanosecond order pulse durations cannot be produced on reactor, a kind of transmission line type impulse electric field corona discharge reactor and manufacture method are provided, enable the pulse voltage that reactor feed-in pulse duration is shorter, reactor is set up larger impulse electric field strength, produces better desulphurization denitration and dust removing effects
.
the technical solution used in the present invention is as follows:
A kind of transmission line type impulse electric field corona discharge reactor manufacture method comprises
Step 1: according to high-field electrode total length L and every grade of high-field electrode length X, determine that high-field electrode total progression N, N are positive integer according to formula (1):
N=L/X （1）；
Step 2: by high-voltage pulse generator at first order high-field electrode head end feed-in high-voltage pulse signal, and first order high-field electrode tail end output high-voltage pulse signal waveform is monitored, adjustment makes feed-in high-voltage pulse signal waveform not distort with output high-voltage pulse signal waveform, makes to form uniform transmission line between first order high-field electrode and shell; Described first order high-field electrode head end connects high-voltage pulse generator, is input port;
Step 3: repeat step 2 and successively all the other N-1 level high-field electrodes and first order high-field electrode to be connected from beginning to end successively cascade, described N level tandem high pressure electrode head and the tail connect respectively by electrical cnnector, make to form uniform transmission line between N level tandem high pressure electrode and shell, described N level tandem high pressure electrode is placed with in shell, and described N level high-field electrode tail end is output port.
Described step 1 mesohigh electrode total length L determination concrete steps calculate high-field electrode total length L according to formula (2):
L=P/Q （2）
Wherein permit attenuation in transmission signal process in the P high-field electrode that to be pulse voltage amplitude connect in N level, unit is dB, and described Q is the attenuation of every meter of high-field electrode signal transmission, and unit is dB/m.
The determination of every grade of high-field electrode length X in described step 1, concrete steps:
Step 11: the dielectric voltage withstand distance S between high-field electrode and shell can be obtained by formula (3):
S=k*Vcc/E （3）
Wherein E is work field intensity, unit to be V/m, k be greater than 1 coefficient of safety;
Step 12: then obtain high-field electrode length X length according to formula (4):
X=H-2*（S+M） （4）
Wherein H is height for reactor, and unit is m, M is electrical cnnector height, and unit is m.
The detailed process forming uniform transmission line in described step 3 between N level tandem high pressure electrode and shell is by high-voltage pulse generator feed-in high-voltage pulse signal from input port, adopt the waveform of oscilloscope measurement input port and output port, if the high-voltage pulse signal of input port and output port does not distort, then form uniform transmission line between the high-field electrode of N level series connection and shell
Transmission line type impulse electric field corona discharge reactor comprises
N level high-field electrode, for transferring high voltage signal, its N level high-field electrode successively head and the tail series connection forms N level tandem high pressure electrode;
Electrical cnnector, for connecting described N level high-field electrode head and the tail successively respectively;
Shell, for ground connection, the high-field electrode of described N level series connection is positioned in shell.
The determination of described N level high-field electrode progression is according to high-field electrode total length L and every grade of high-field electrode length X, determines the total progression N of high-field electrode according to formula (1):
N=L/X （1）。
Described total length L calculates high-field electrode total length L according to formula (2):
L=P/Q （2）
Wherein P is that pulse voltage amplitude permits attenuation in high-field electrode transmission signal process, and unit is dB; Q is the attenuation of every meter of high-field electrode signal transmission, and unit is dB/m.
The determination of described every grade of high-field electrode length X, concrete steps:
Step 11:: determine the dielectric voltage withstand distance S between high-field electrode and shell by formula (3):
S=k*Vcc/E （3）
Wherein E is work field intensity, unit to be V/m, k be greater than 1 coefficient of safety;
Step 12: then obtain high-field electrode length X length according to formula (4):
X=H-2*（S+M） （4）
Wherein H is height for reactor, and unit is m, M is electrical cnnector height, and unit is m
.
in sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
The high-field electrode of reactor is connect according to series system, allows reactor in circuit topological structure, be equivalent to the pulse transmission line with blocked impedance.Make the intrinsic structure capacitive of its nanofarad up to a hundred, the form of expression becomes distributed constant, instead of lumped parameter, just eliminates the impact of huge structure capacitive amount paired pulses power supply, thus can produce the impulse electric field of hundred nanosecond order pulse durations on reactor.The time that impulse electric field is applied on reactor is shorter, and the electric field strength of impulse electric field just can be higher, and the working effect of reactor is better.By this transmission line type impulse electric field corona discharge reactor design, the impedance transmission lines transmission meanss such as the electric link between reactor and the pulse power becomes can be made, pulse voltage is transmitted waiting in impedance transmission lines, there is not large distortion in the pulse front edge of pulse voltage and pulse duration, can ensure that pulse energy effectively can inject discharge reactor.
All high-voltage discharging electrodes head and the tail are connected by the electric insulation construction design method of described burst transmissions line style nanosecond pulsed electric field corona discharge reactor successively.The electric link between reactor and the pulse power can be made to become equivalent matched its load form; There is not large distortion in pulse front edge and the pulse duration of the pulse voltage in effective guarantee feed-in reactor; Pulse energy is enable effectively to inject discharge reactor; Reactor is set up larger impulse electric field strength, produces better desulphurization denitration and dust removing effects.
Accompanying drawing explanation
examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is concrete electrical connection schematic diagram of the present invention.
In figure: 1-shell 2-input port 3-output port
4-electrical cnnector 5-high-field electrode
.
Embodiment
all features disclosed in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
arbitrary feature disclosed in this specification (comprising any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
Related description of the present invention
1, pulse voltage amplitude is the signal amplitude needing to transmit on high-field electrode.
2, permit that attenuation is that pulse voltage amplitude is in high-field electrode transmitting procedure voltage signal attenuation.
3, the detailed process forming uniform transmission line in described step 2 between N level high-field electrode and shell is by high-voltage pulse generator feed-in high-voltage pulse signal from input port, adopt the waveform of oscilloscope measurement input port and output port, if the high-voltage pulse signal of input port and output port does not distort, then form uniform transmission line between the high-field electrode of N level series connection and shell.Uniform transmission line refers to transmission line in a segment length, can think that its parameter is identical everywhere.
4, the electrical connection between reactor and high-voltage pulse power source is that equivalent matched load makes signal transmission that the principle distorted not occur, and according to " strong current pulse discharge technology ", author Han Min, publishing house of Tsing-Hua University publishes, and P175-183 page is known.
5, according to the characteristic impedance of N level tandem high pressure electrode, design the high-voltage pulse power source of corresponding characteristic impedance, make the electrical connection between reactor and high-voltage pulse power source be equivalent matched load.Namely the impedance of high-voltage pulse power source is equal with the characteristic impedance of wherein test reactor, the characteristic impedance method of testing of reactor: employing impedance is Z
1square-wave pulse generator, for reactor feed voltage amplitude is U
1square-wave pulse, the voltage magnitude in test reactor is U
2, then the impedance obtaining reactor according to formula (5) is Z
2.
Z
2=U
2Z
1/(2U
1－U
2) （5）
Embodiment one: a kind of transmission line type impulse electric field corona discharge reactor manufacture method, is characterized in that comprising
Step 1: according to high-field electrode total length L and every grade of high-field electrode length X, determine that high-field electrode total progression N, N are positive integer according to formula (1):
N=L/X （1）；
Step 2: by high-voltage pulse generator at first order high-field electrode head end feed-in high-voltage pulse signal, and first order high-field electrode tail end output high-voltage pulse signal waveform is monitored, adjustment makes feed-in high-voltage pulse signal waveform not distort with output high-voltage pulse signal waveform, makes to form uniform transmission line between first order high-field electrode and shell; Described first order high-field electrode head end connects high-voltage pulse generator, is input port;
Step 3: repeat step 2 and successively all the other N-1 level high-field electrodes and first order high-field electrode to be connected from beginning to end successively cascade, described N level tandem high pressure electrode head and the tail connect respectively by electrical cnnector, make to form uniform transmission line between N level tandem high pressure electrode and shell, described N level tandem high pressure electrode is placed with in shell, and described N level high-field electrode tail end is output port.
Embodiment two: on embodiment one basis, described step 1 mesohigh electrode total length L determination concrete steps calculate high-field electrode total length L according to formula (2):
L=P/Q （2）
Wherein permit attenuation in transmission signal process in the P high-field electrode that to be pulse voltage amplitude connect in N level, unit is dB, and described Q is the attenuation of every meter of high-field electrode signal transmission, and unit is dB/m.
Embodiment three: on embodiment one or two basis, the determination of every grade of high-field electrode length X in described step 1, concrete steps:
Step 11: the dielectric voltage withstand distance S between high-field electrode and shell can be obtained by formula (3):
S=k*Vcc/E （3）
Wherein E is work field intensity, unit to be V/m, k be greater than 1 coefficient of safety;
Step 12: then obtain high-field electrode length X length according to formula (4):
X=H-2*（S+M） （4）
Wherein H is height for reactor, and unit is m, M is electrical cnnector height, and unit is m.
Embodiment four: as shown in Figure 1, in embodiment always one of three bases, the detailed process forming uniform transmission line in described step 3 between N level tandem high pressure electrode and shell is by high-voltage pulse generator feed-in high-voltage pulse signal from input port, adopt the waveform of oscilloscope measurement input port and output port, if the high-voltage pulse signal of input port and output port does not distort, then form uniform transmission line between the high-field electrode of N level series connection and shell.
Embodiment five: on embodiment one basis, transmission line type impulse electric field corona discharge reactor comprises N level high-field electrode, and for transferring high voltage signal, its N level high-field electrode successively head and the tail series connection forms N level tandem high pressure electrode; Electrical cnnector, for connecting described N level high-field electrode head and the tail successively respectively; Shell, for ground connection, the high-field electrode of described N level series connection is positioned in shell.
Embodiment six: on embodiment five basis, the determination of described N level high-field electrode progression is according to high-field electrode total length L and every grade of high-field electrode length X, determines the total progression N of high-field electrode according to formula (1):
N=L/X （1）。
Embodiment seven: on embodiment four or five or six basis, described total length L calculates high-field electrode total length L according to formula (2):
L=P/Q （2）
Wherein P is that pulse voltage amplitude permits attenuation in high-field electrode transmission signal process, and unit is dB; Q is the attenuation of every meter of high-field electrode signal transmission, and unit is dB/m.
Embodiment eight: on embodiment six basis, the determination of described every grade of high-field electrode length X, concrete steps:
Step 11: determine the dielectric voltage withstand distance S between high-field electrode and shell by formula (3):
S=k*Vcc/E （3）
Wherein E is work field intensity, unit to be V/m, k be greater than 1 coefficient of safety;
Step 12: then obtain high-field electrode length X length according to formula (4):
X=H-2*（S+M） （4）
Wherein H is height for reactor, and unit is m, M is electrical cnnector height, and unit is m.
Embodiment nine: on embodiment one to eight basis, illustrate the design process of reactor:
Step 1: the total length L according to pulse voltage amplitude license attenuation determination high-voltage discharging electrode on the transmission line (supposes that the license attenuation of voltage is 0.5dB, and the attenuation of high-field electrode test is every meter of 0.005dB/m, then the total length L of high-field electrode is 100 meters.)
Step 2: determine that the work field intensity that the length X(hypothesis of every one-level high-field electrode designs is 1000kV/m according to the concrete size of reactor, operating voltage is 150kV, and coefficient of safety gets 2, dielectric voltage withstand distance=2 × 150kV/1000kV/m=0.3m).The height of connector is 0.2m, reactor height 5m, then high-field electrode length X=reactor high by-2 × (dielectric voltage withstand distance+connector height)=5-2 × (0.3+0.2)=4m.(be multiplied by 2 be high-field electrode two ends up and down all should with keep identical safe distance between shell).
Step 3: the determination of high-field electrode progression is according to high-field electrode total length L and every grade of high-field electrode length X, determines the total progression N:N=L/X=100/4=25 of high-field electrode according to formula (1).
Step 4: by high-voltage pulse generator at first order high-field electrode head end feed-in high-voltage pulse signal, and first order high-field electrode tail end output high-voltage pulse signal waveform is monitored, adjustment makes feed-in high-voltage pulse signal waveform not distort with output high-voltage pulse signal waveform, makes to form uniform transmission line between first order high-field electrode and shell; Repeat above-mentioned steps successively all the other N-1 level high-field electrodes and first order high-field electrode to be connected from beginning to end successively cascade, make to form uniform transmission line between N level tandem high pressure electrode and shell.
Step 5: the characteristic impedance after test N level tandem high pressure electrode and between shell, designs the high-voltage pulse power source of corresponding characteristic impedance, makes the electrical connection between reactor and high-voltage pulse power source be equivalent matched load.Namely the impedance of high-voltage pulse power source is equal with the characteristic impedance of wherein test reactor, (suppose that employing impedance is the square-wave pulse generator of 50 Ω, for reactor feed voltage amplitude is the square-wave pulse of 10V, the voltage magnitude that test reactor exports is 10V, then the impedance obtaining reactor according to formula (5) is Z
2.
Z
2=10V×50Ω/(2×10V－10V)=50Ω。Design high-voltage pulse power source, make its output impedance be 50 Ω, then the electrical connection between reactor and high-voltage pulse power source is equivalent matched load.）
the present invention is not limited to aforesaid embodiment.The present invention expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (2)
1. a transmission line type impulse electric field corona discharge reactor manufacture method, is characterized in that comprising
Step 1: according to high-field electrode total length L and every grade of high-field electrode length X, determine that high-field electrode total progression N, N are positive integer according to formula (1):
N=L/X （1）；
Step 2: by high-voltage pulse generator at first order high-field electrode head end feed-in high-voltage pulse signal, and first order high-field electrode tail end output high-voltage pulse signal waveform is monitored, adjustment makes feed-in high-voltage pulse signal waveform not distort with output high-voltage pulse signal waveform, makes to form uniform transmission line between first order high-field electrode and shell; Described first order high-field electrode head end connects high-voltage pulse generator, is input port;
Step 3: repeat step 2 and successively all the other N-1 level high-field electrodes and first order high-field electrode to be connected from beginning to end successively cascade, described N level tandem high pressure electrode head and the tail connect respectively by electrical cnnector, make to form uniform transmission line between N level tandem high pressure electrode and shell, described N level tandem high pressure electrode is positioned in shell, and described N level high-field electrode tail end is output port;
Described step 1 mesohigh electrode total length L determination concrete steps calculate high-field electrode total length L according to formula (2):
L=P/Q （2）
Wherein permit attenuation in transmission signal process in the P high-field electrode that to be pulse voltage amplitude connect in N level, unit is dB, and described Q is the attenuation of every meter of high-field electrode signal transmission, and unit is dB/m; The detailed process forming uniform transmission line in described step 3 between N level tandem high pressure electrode and shell is by high-voltage pulse generator feed-in high-voltage pulse signal from input port, adopt the waveform of oscilloscope measurement input port and output port, if the high-voltage pulse signal of input port and output port does not distort, then form uniform transmission line between the high-field electrode of N level series connection and shell; The determination of every grade of high-field electrode length X in described step 1, concrete steps:
Step 11: the dielectric voltage withstand distance S between high-field electrode and shell can be obtained by formula (3):
S=k*Vcc/E （3）
Wherein E is work field intensity, unit to be kV/m, k be greater than 1 coefficient of safety; Vcc is operating voltage, and unit is kV;
Step 12: then obtain high-field electrode length X according to formula (4):
X=H-2（S+M） （4）
Wherein H is height for reactor, and unit is m, M is electrical cnnector height, and unit is m.
2. the transmission line type impulse electric field corona discharge reactor of method making according to claim 1, is characterized in that comprising
N level high-field electrode, for transferring high voltage signal, its N level high-field electrode successively head and the tail series connection forms N level tandem high pressure electrode;
Electrical cnnector, for connecting described N level high-field electrode head and the tail successively respectively;
Shell, for ground connection, the high-field electrode of described N level series connection is positioned in shell;
The determination of described N level high-field electrode progression is according to high-field electrode total length L and every grade of high-field electrode length X, determines the total progression N of high-field electrode according to formula (1):
N=L/X （1）；
Described total length L calculates high-field electrode total length L according to formula (2):
L=P/Q （2）
Wherein P is that pulse voltage amplitude permits attenuation in high-field electrode transmission signal process, and unit is dB; Q is the attenuation of every meter of high-field electrode signal transmission, and unit is dB/m; The determination of described every grade of high-field electrode length X, concrete steps:
Step 11: determine the dielectric voltage withstand distance S between high-field electrode and shell by formula (3):
S=k*Vcc/E （3）
Wherein E is work field intensity, unit to be kV/m, k be greater than 1 coefficient of safety; Vcc is operating voltage, and unit is kV;
Step 12: then obtain high-field electrode length X according to formula (4):
X=H-2（S+M） （4）
Wherein H is height for reactor, and unit is m, M is electrical cnnector height, and unit is m.
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