CN102970811A - Transmission line type pulse electric field corona discharge reactor and manufacturing method thereof - Google Patents
Transmission line type pulse electric field corona discharge reactor and manufacturing method thereof Download PDFInfo
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Abstract
The invention relates to the field of corona discharge reactors, and particularly relates to a transmission line type pulse electric field corona discharge reactor and a manufacturing method thereof. The transmission line type pulse electric field corona discharge reactor and the manufacturing method thereof which are provided by the invention overcome the defect that the traditional pulse electric field corona discharge reactor applied to an industrial system can not generate a pulse electric field with hundred nanosecond magnitude pulse width due to large inherent structural capacitance, thereby feeding the pulse voltage with shorter pulse width in the reactor, establishing higher pulse electric field strength on the reactor and generating better desulfuration, denitration and dedusting effects. The transmission line type pulse electric field corona discharge reactor and the manufacturing method thereof which are provided by the invention determine that the heads and tails of N-level high-voltage electrodes are respectively connected through electric connectors according to the total length L of high-voltage electrodes and the length X of each-level high-voltage electrodes, and are mainly applied to the field of reactor design.
Description
Technical field
The present invention relates to the 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, and making State of Air pollution continue to worsen becomes one of current global ten overall situation problems.Traditional improvement method mainly contained in the past: absorption method, absorption process, firing method, oxidizing process etc.Along with complicated, large flow, the concentration high of pollutant composition, these technology all exist that purification efficiency is low or operating cost is high or easily cause the shortcomings such as secondary pollution.With respect to tradition improvement method, the Low Temperature Plasma Treating technology receives much concern because of ultra-traditional technique.The mode that produces low temperature plasma is more, comprises glow discharge, corona discharge, dielectric barrier discharge and radio frequency discharge etc.By practical application, corona discharge and dielectric barrier discharge are the most extensive the application of 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 cleanup is thorough, does not produce the advantages such as secondary pollution.
At present, the impulse electric field corona discharge reactor high-field electrode that is applied to industrial system adopts parallel way to connect, its intrinsic structure capacitive amount reaches nanofarads up to a hundred, the form of expression is lumped parameter, and large like this capacitance makes and can't on reactor, produce the impulse electric field of hundred nanosecond order pulse durations
.
Summary of the invention
technical problem to be solved by this invention is:overcome the intrinsic structure capacitive amount of the impulse electric field corona discharge reactor that is applied to now industrial system large, can't on reactor, produce the shortcoming of the impulse electric field of hundred nanosecond order pulse durations, a kind of transmission line type impulse electric field corona discharge reactor and manufacture method are provided, make the reactor can the shorter pulse voltage of feed-in pulse duration, set up larger impulse electric field strength on reactor, produce 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, according to formula (1), determine the total progression N of high-field electrode, N is positive integer:
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, adjusting makes feed-in high-voltage pulse signal waveform and exports not distorted of high-voltage pulse signal waveform, makes between first order high-field electrode and shell and forms uniform transmission line; Described first order high-field electrode head end connects high-voltage pulse generator, is input port;
Step 3: repeating step 2 cascade of successively all the other N-1 level high-field electrodes and first order high-field electrode head and the tail being connected successively, described N level series connection high-field electrode head and the tail are connected by electrical cnnector respectively, make between N level series connection high-field electrode and shell and form uniform transmission line, in described N level series connection high-field electrode placement and shell, described N level high-field electrode tail end is output port.
Described step 1 mesohigh electrode total length L determines that concrete steps are to calculate the high-field electrode total length L according to formula (2):
L=P/Q （2）
Wherein P is that pulse voltage amplitude is permitted attenuation in transmission signal process in the high-field electrode of N level series connection, and unit is dB, and described Q is the attenuation of every meter high-field electrode signal transmission, and unit is dB/m.
In described step 1, every grade of high-field electrode length X is definite, concrete steps:
Step 11: by formula (3), can obtain dielectric voltage withstand between high-field electrode and shell apart from S:
S=k*Vcc/E （3）
Wherein E is the work field intensity, and unit is V/m, and k is greater than 1 coefficient of safety;
Step 12: according to formula (4), obtain high-field electrode length X length:
X=H-2*（S+M） （4）
Wherein H is height for reactor, and unit is m, and M is the electrical cnnector height, and unit is m.
The detailed process that forms uniform transmission line in described step 3 between N level series connection 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 have distorted, between the high-field electrode of N level series connection and shell, form uniform transmission line
Transmission line type impulse electric field corona discharge reactor comprises
N level high-field electrode, for the transferring high voltage signal, its N level high-field electrode head and the tail series connection successively forms N level series connection high-field electrode;
Electrical cnnector, for connecting described N level high-field electrode successively respectively from beginning to end;
Shell, for ground connection, the high-field electrode of described N level series connection is positioned in shell.
The definite 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, according to formula (1), determines the total progression N of high-field electrode:
N=L/X （1）。
Described total length L is to calculate the high-field electrode total length L according to formula (2):
L=P/Q （2）
Wherein P is that pulse voltage amplitude is permitted attenuation in the high-field electrode transmission signal process, and unit is dB; Q is the attenuation of every meter high-field electrode signal transmission, and unit is dB/m.
Determining of described every grade of high-field electrode length X, concrete steps:
Step 11:: by formula (3), determine that dielectric voltage withstand between high-field electrode and shell is apart from S:
S=k*Vcc/E （3）
Wherein E is the work field intensity, and unit is V/m, and k is greater than 1 coefficient of safety;
Step 12: according to formula (4), obtain high-field electrode length X length:
X=H-2*（S+M） （4）
Wherein H is height for reactor, and unit is m, and M is the electrical cnnector height, and unit is m
.
in sum, owing to having adopted technique scheme, the invention has the beneficial effects as follows:
The high-field electrode of reactor is connect according to series system, allow reactor be equivalent to the pulse transmission line with blocked impedance in circuit topological structure.Make the intrinsic structure capacitive of its nanofarads up to a hundred, the form of expression becomes distributed constant, rather than lumped parameter, has just got rid of the impact of huge structure capacitive amount paired pulses power supply, thereby can on reactor, produce the impulse electric field of hundred nanosecond order pulse durations.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 just better.By this transmission line type impulse electric field corona discharge reactor design, the impedance transmission lines transmission means such as can make electric connection between reactor and the pulse power become, pulse voltage is transmitted in waiting impedance transmission lines, large distortion does not occur in the pulse front edge of pulse voltage and pulse duration, can guarantee that pulse energy can effectively inject discharge reactor.
The electric insulation construction design method of described burst transmissions line style nanosecond pulse electric field corona discharge reactor, by all high-voltage discharging electrode head and the tail series connection successively.Can make the electric connection between reactor and the pulse power become the equivalent matched its load form; Large distortion does not occur in the pulse front edge and the pulse duration that effectively guarantee the pulse voltage in the feed-in reactor; Make pulse energy can effectively inject discharge reactor; Set up larger impulse electric field strength on reactor, produce better desulphurization denitration and dust removing effects.
The 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
disclosed all features 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.
disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing), unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is,, unless special narration, each feature is an example in a series of equivalences or similar characteristics.
Related description of the present invention
1, pulse voltage amplitude is the signal amplitude that need to transmit on high-field electrode.
2, the license attenuation is that pulse voltage amplitude is in high-field electrode transmitting procedure voltage signal attenuation.
3, the detailed process that forms 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 have distorted, between the high-field electrode of N level series connection and shell, form uniform transmission line.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 the equivalent matched load makes the not principle of distorted of signal transmission, and according to " strong current pulse discharge technology ", author Han Min, publishing house of Tsing-Hua University publishes, and the P175-183 page is known.
5, according to the characteristic impedance of N level series connection high-field electrode, design the high-voltage pulse power source of corresponding characteristic impedance, making the electrical connection between reactor and high-voltage pulse power source is the equivalent matched load.Being the impedance of high-voltage pulse power source equates with the characteristic impedance of test reactor wherein, and the characteristic impedance method of testing of reactor: the employing impedance is Z
1square-wave pulse generator, for reactor feed voltage amplitude is U
1square-wave pulse, the voltage magnitude on test reactor is U
2, the impedance that according to formula (5), obtains reactor is Z
2.
Z
2=U
2Z
1/(2U
1－U
2) （5）
Embodiment mono-: 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, according to formula (1), determine the total progression N of high-field electrode, N is positive integer:
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, adjusting makes feed-in high-voltage pulse signal waveform and exports not distorted of high-voltage pulse signal waveform, makes between first order high-field electrode and shell and forms uniform transmission line; Described first order high-field electrode head end connects high-voltage pulse generator, is input port;
Step 3: repeating step 2 cascade of successively all the other N-1 level high-field electrodes and first order high-field electrode head and the tail being connected successively, described N level series connection high-field electrode head and the tail are connected by electrical cnnector respectively, make between N level series connection high-field electrode and shell and form uniform transmission line, in described N level series connection high-field electrode placement and shell, described N level high-field electrode tail end is output port.
Embodiment bis-: on embodiment mono-basis, described step 1 mesohigh electrode total length L determines that concrete steps are to calculate the high-field electrode total length L according to formula (2):
L=P/Q （2）
Wherein P is that pulse voltage amplitude is permitted attenuation in transmission signal process in the high-field electrode of N level series connection, and unit is dB, and described Q is the attenuation of every meter high-field electrode signal transmission, and unit is dB/m.
Embodiment tri-: on embodiment mono-or two bases, in described step 1, every grade of high-field electrode length X is definite, concrete steps:
Step 11: by formula (3), can obtain dielectric voltage withstand between high-field electrode and shell apart from S:
S=k*Vcc/E （3）
Wherein E is the work field intensity, and unit is V/m, and k is greater than 1 coefficient of safety;
Step 12: according to formula (4), obtain high-field electrode length X length:
X=H-2*（S+M） （4）
Wherein H is height for reactor, and unit is m, and M is the electrical cnnector height, and unit is m.
Embodiment tetra-: as shown in Figure 1, at embodiment always on one of three bases, the detailed process that forms uniform transmission line in described step 3 between N level series connection 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 have distorted, between the high-field electrode of N level series connection and shell, form uniform transmission line.
Embodiment five: on embodiment mono-basis, transmission line type impulse electric field corona discharge reactor comprises N level high-field electrode, and for the transferring high voltage signal, its N level high-field electrode head and the tail series connection successively forms N level series connection high-field electrode; Electrical cnnector, for connecting described N level high-field electrode successively respectively from beginning to end; Shell, for ground connection, the high-field electrode of described N level series connection is positioned in shell.
Embodiment six: on embodiment five bases, the definite 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, according to formula (1), determines the total progression N of high-field electrode:
N=L/X （1）。
Embodiment seven: on embodiment tetra-or five or six bases, described total length L is to calculate the high-field electrode total length L according to formula (2):
L=P/Q （2）
Wherein P is that pulse voltage amplitude is permitted attenuation in the high-field electrode transmission signal process, and unit is dB; Q is the attenuation of every meter high-field electrode signal transmission, and unit is dB/m.
Embodiment eight: on embodiment six bases, and the determining of described every grade of high-field electrode length X, concrete steps:
Step 11: by formula (3), determine that dielectric voltage withstand between high-field electrode and shell is apart from S:
S=k*Vcc/E （3）
Wherein E is the work field intensity, and unit is V/m, and k is greater than 1 coefficient of safety;
Step 12: according to formula (4), obtain high-field electrode length X length:
X=H-2*（S+M） （4）
Wherein H is height for reactor, and unit is m, and M is the electrical cnnector height, and unit is m.
Embodiment nine: on embodiment mono-to eight basis, illustrate the design process of reactor:
Step 1: the license attenuation according to pulse voltage amplitude on transmission line determines that (the license attenuation of supposing voltage is 0.5dB for the total length L of high-voltage discharging electrode, and the attenuation of high-field electrode test is every meter 0.005dB/m, the total length L of high-field electrode is 100 meters.)
Step 2: the length X (the work field intensity of supposing design is 1000kV/m, and operating voltage is 150kV, and coefficient of safety gets 2, dielectric voltage withstand distance=2 * 150kV/1000kV/m=0.3m) of determining every one-level high-field electrode according to the concrete size of reactor.The height of connector is 0.2m, the high 5m of reactor, 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 shell between keep identical safe distance).
Step 3: the definite of high-field electrode progression is according to high-field electrode total length L and every grade of high-field electrode length X, according to formula (1), determines the total progression N:N=L/X=100/4=25 of high-field electrode.
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, adjusting makes feed-in high-voltage pulse signal waveform and exports not distorted of high-voltage pulse signal waveform, makes between first order high-field electrode and shell and forms uniform transmission line; Repeat the above-mentioned steps cascade of successively all the other N-1 level high-field electrodes and first order high-field electrode head and the tail being connected successively, make the N level connect and form uniform transmission line between high-field electrode and shell.
Step 5: after test N level series connection high-field electrode and the characteristic impedance between shell, design the high-voltage pulse power source of corresponding characteristic impedance, making the electrical connection between reactor and high-voltage pulse power source is the equivalent matched load.Being the impedance of high-voltage pulse power source equates with the characteristic impedance of test reactor wherein, (suppose to adopt the square-wave pulse generator that impedance is 50 Ω, for the reactor feed voltage amplitude square-wave pulse that is 10V, the voltage magnitude of test reactor output is 10V, and the impedance that according to formula (5), obtains reactor is Z
2.
Z
2=10V×50Ω/(2×10V－10V)=50Ω。The design high-voltage pulse power source, making its output impedance is 50 Ω, the electrical connection between reactor and high-voltage pulse power source is the equivalent matched load.）
the present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination disclosed in this manual, and the arbitrary new method disclosed or step or any new combination of process.
Claims (8)
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, according to formula (1), determine the total progression N of high-field electrode, N is positive integer:
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, adjusting makes feed-in high-voltage pulse signal waveform and exports not distorted of high-voltage pulse signal waveform, makes between first order high-field electrode and shell and forms uniform transmission line; Described first order high-field electrode head end connects high-voltage pulse generator, is input port;
Step 3: repeating step 2 cascade of successively all the other N-1 level high-field electrodes and first order high-field electrode head and the tail being connected successively, described N level series connection high-field electrode head and the tail are connected by electrical cnnector respectively, make between N level series connection high-field electrode and shell and form uniform transmission line, in described N level series connection high-field electrode placement and shell, described N level high-field electrode tail end is output port.
2. transmission line type impulse electric field corona discharge reactor manufacture method according to claim 1 is characterized in that described step 1 mesohigh electrode total length L determines that concrete steps are to calculate the high-field electrode total length L according to formula (2):
L=P/Q （2）
Wherein P is that pulse voltage amplitude is permitted attenuation in transmission signal process in the high-field electrode of N level series connection, and unit is dB, and described Q is the attenuation of every meter high-field electrode signal transmission, and unit is dB/m.
3. transmission line type impulse electric field corona discharge reactor manufacture method according to claim 2 is characterized in that determining of every grade of high-field electrode length X in described step 1, concrete steps:
Step 11: by formula (3), can obtain dielectric voltage withstand between high-field electrode and shell apart from S:
S=k*Vcc/E （3）
Wherein E is the work field intensity, and unit is V/m, and k is greater than 1 coefficient of safety;
Step 12: according to formula (4), obtain high-field electrode length X length:
X=H-2*（S+M） （4）
Wherein H is height for reactor, and unit is m, and M is the electrical cnnector height, and unit is m.
4. transmission line impulse electric field corona discharge reactor according to claim 1, the detailed process that it is characterized in that forming between the series connection high-field electrode of N level in described step 3 and shell uniform transmission line 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 have distorted, between the high-field electrode of N level series connection and shell, form uniform transmission line.
5. transmission line type impulse electric field corona discharge reactor according to claim 1, is characterized in that comprising
N level high-field electrode, for the transferring high voltage signal, its N level high-field electrode head and the tail series connection successively forms N level series connection high-field electrode;
Electrical cnnector, for connecting described N level high-field electrode successively respectively from beginning to end;
Shell, for ground connection, the high-field electrode of described N level series connection is positioned in shell.
6. transmission line type impulse electric field corona discharge reactor according to claim 5, it is characterized in that the definite 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, according to formula (1), determine the total progression N of high-field electrode:
N=L/X （1）。
7. transmission line type impulse electric field corona discharge reactor according to claim 6 is characterized in that described total length L is to calculate the high-field electrode total length L according to formula (2):
L=P/Q （2）
Wherein P is that pulse voltage amplitude is permitted attenuation in the high-field electrode transmission signal process, and unit is dB; Q is the attenuation of every meter high-field electrode signal transmission, and unit is dB/m.
8. transmission line type impulse electric field corona discharge reactor according to claim 7 is characterized in that determining of described every grade of high-field electrode length X, concrete steps:
Step 11: by formula (3), determine that dielectric voltage withstand between high-field electrode and shell is apart from S:
S=k*Vcc/E （3）
Wherein E is the work field intensity, and unit is V/m, and k is greater than 1 coefficient of safety;
Step 12: according to formula (4), obtain high-field electrode length X length:
X=H-2*（S+M） （4）
Wherein H is height for reactor, and unit is m, and M is the electrical cnnector height, and unit is m.
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