CN210458378U - Adiponitrile electrolysis rectifier circuit with four groups of balance reactors - Google Patents
Adiponitrile electrolysis rectifier circuit with four groups of balance reactors Download PDFInfo
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- CN210458378U CN210458378U CN201921333627.3U CN201921333627U CN210458378U CN 210458378 U CN210458378 U CN 210458378U CN 201921333627 U CN201921333627 U CN 201921333627U CN 210458378 U CN210458378 U CN 210458378U
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Abstract
The utility model relates to an adiponitrile electrolytic rectification circuit with four group's balance reactors belongs to the harmonic of adiponitrile production technology and administers circuit technical field. The utility model comprises a rectifier transformer, a rectifier cabinet and an electrolytic bath, wherein the primary side of the rectifier transformer is connected with a 35kV bus, the secondary side of the rectifier transformer is connected with the electrolytic bath through the rectifier cabinet, the secondary side of the rectifier transformer adopts a double inverted star-shaped rectifier circuit, each phase of the double inverted star-shaped rectifier circuit is provided with four windings with the same number of turns and opposite polarities, and the four windings are respectively connected into six groups of three-phase half-wave circuits; the electrolytic rectification circuit is also provided with four groups of balance reactors with secondary sides, six groups of three-phase half-wave circuits are connected in parallel with the primary side coils of the balance reactors, and the middle taps of the primary side coils of the balance reactors are connected with the electrodes of the electrolytic tanks; six groups of three-phase half-wave rectification circuits can be conducted simultaneously, and each group bears half of load; the conducting path of the double reversed star-shaped rectifying circuit is connected to the electrode of the electrolytic cell through one rectifying tube voltage drop of the rectifying cabinet.
Description
Technical Field
The utility model relates to an adiponitrile electrolytic rectification circuit with four group's balance reactors belongs to the harmonic of adiponitrile production technology and administers circuit technical field.
Background
The adiponitrile production is divided into an electrosynthesis process working section and a rectification process working section. The electrosynthesis working section is to inject raw material acrylonitrile into an electrolysis system through a mixer and obtain crude adiponitrile through electrolysis.
However, at present, a double-strip balance reactor double-inverted star-shaped controllable rectifier is generally adopted in an electrosynthesis process section, for example, the technical scheme disclosed by ZL201720366583.9 has the advantages of high power factor, material reduction, energy conservation and low pollution of harmonic current to a power grid. However, the electrosynthesis process section for producing adiponitrile in the prior art has the following problems that (1) the strong nonlinearity of the existing double-reversed star-shaped thyristor rectification system can cause the current double-reversed star-shaped thyristor rectification system to generate a large amount of harmonic waves; (2) the problem of increasing the volume and capacity of the system by installing a filter on the AC side.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned defect that prior art exists, the utility model provides an adiponitrile electrolysis rectifier circuit with four group's balance reactor improves two anti-star rectifier circuit under the condition of not installing the wave filter, for adiponitrile electrolysis provides full wave rectification, and the current increase is one time, and can eliminate unshakable in one's determination direct current magnetization.
The utility model discloses an adiponitrile electrolytic rectification circuit with four group balance reactors, including rectifier transformer, rectifier cabinet and electrolysis trough, rectifier transformer once links to each other with the 35kV generating line, rectifier transformer secondary side passes through the rectifier cabinet and links to each other with the electrolysis trough, the electrolysis trough is stored with the aqueous solution or the emulsion that acrylonitrile and electrolyte phosphate were joined in marriage, acrylonitrile forms adiponitrile through the direct current electrolysis after the rectification, rectifier transformer secondary side adopts two anti-star rectifier circuits, two anti-star rectifier circuits's every phase is provided with four windings that the number of turns is the same, polarity is opposite, become six groups of three-phase half-wave circuit respectively; the electrolytic rectification circuit is also provided with four groups of balance reactors with secondary sides, six groups of three-phase half-wave circuits are connected in parallel with the primary side coils of the balance reactors, and the middle taps of the primary side coils of the balance reactors are connected with the electrodes of the electrolytic tanks; six groups of three-phase half-wave rectification circuits can be conducted simultaneously, and each group bears half of load; the conducting path of the double reversed star-shaped rectifying circuit is connected to the electrode of the electrolytic cell through one rectifying tube voltage drop of the rectifying cabinet.
Furthermore, the end of each double-reverse star-shaped rectifying circuit is connected with the anode of one controllable rectifying device and the cathode of the other controllable rectifying device, and the controllable rectifying devices are thyristors.
Furthermore, the balance reactor takes any time of 0-2 pi, the voltage difference of the first half period of 0-pi is added to the thyristor a1, the voltage difference of the two sections of a3 is a positive value, and the thyristors a1 and a3 are switched on; the voltage difference of two sections of the thyristor a2 and a4 is a negative value in the second half period of pi-2 pi, and the thyristors a2 and a4 are switched on;
the balance reactor takes any time of 0-2 pi, the voltage difference of the first half period of 0-pi added to the thyristor b1 and b3 is a positive value, and the thyristors b1 and b3 are switched on; the voltage difference between two sections of the thyristors b2 and b4 in the second half period pi-2 pi is a negative value, and the thyristors b2 and b4 are switched on;
the balance reactor is added to the thyristor c1 in the first half period of 0-pi at any time of 0-2 pi, the voltage difference of the two sections of c3 is a positive value, and the thyristors c1 and c3 are switched on; the voltage difference between the two sections of the thyristors c2 and c4 in the second half period is negative, and the thyristors c2 and c4 are switched on.
Further, the controllable rectifier trigger signal is a double-inverted star trigger signal with two phase differences in the same period.
Furthermore, the primary side of the rectifier transformer is connected with a 35kV bus through a vacuum load switch with an auto-coupling voltage regulation function, and the model of the vacuum load switch is ZVV III-350D/40.5-10193W.
Further, the balance reactor is divided into four groups of three phases, and each phase of winding is independent.
The utility model has the advantages that: adiponitrile electrolytic rectification circuit with four group's balance reactors, under the condition of not installing the wave filter, improve two anti star rectifier circuits, for adiponitrile electrolysis provides full wave rectification, the current increase is one time, and can eliminate unshakable in one's determination direct current magnetization.
Drawings
Fig. 1 is a circuit diagram of the present invention.
In the figure: 1. a primary side of a rectifier transformer; 2. a secondary side of the rectifier transformer; 3. a rectifier cabinet; 4. a balance reactor; 5. an electrolytic cell.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1:
as shown in fig. 1, the adiponitrile electrolytic rectification circuit with four groups of balance reactors of the utility model comprises a rectifier transformer, a rectifier cabinet 3 and an electrolytic bath 5, wherein a primary side 1 of the rectifier transformer is connected with a 35kV bus, a secondary side 2 of the rectifier transformer is connected with the electrolytic bath 5 through the rectifier cabinet 3, an aqueous solution or emulsion prepared from acrylonitrile and electrolyte phosphate is stored in the electrolytic bath 5, the acrylonitrile is electrolyzed into adiponitrile through rectified direct current, a double reversed star rectification circuit is adopted on the secondary side 2 of the rectifier transformer, each phase of the double reversed star rectification circuit is provided with four windings with the same number of turns and opposite polarity, and the windings are respectively connected into six groups of three-phase half-wave circuits; the electrolytic rectification circuit is also provided with four groups of balance reactors 4 with secondary sides, six groups of three-phase half-wave circuits are connected in parallel with the primary side coils of the balance reactors 4, and the middle taps of the primary side coils of the balance reactors 4 are connected with the electrodes of the electrolytic bath 5; six groups of three-phase half-wave rectification circuits can be conducted simultaneously, and each group bears half of load; the conductive path of the double anti-star rectifier circuit is connected to the electrodes of the electrolytic cell 5 through one rectifier tube voltage drop of the rectifier cabinet 3.
The end of each double-reverse star-shaped rectifying circuit is connected with the anode of one controllable rectifying device and the cathode of the other controllable rectifying device, and the controllable rectifying devices are thyristors. The thyristor gate pulse triggers a phase shift as a voltage phase fine adjustment.
The controllable rectifying device trigger signal is a double-inverted star trigger signal with two phase differences in the same period.
Taking phase a as an example: the balance reactor 4 is added to the thyristor a1 in the first half period of 0-pi at any time of 0-2 pi, the voltage difference between the two sections of a3 is a positive value, and the thyristors a1 and a3 are switched on; the voltage difference of two sections of the thyristor a2 and a4 is a negative value in the second half period of pi-2 pi, and the thyristors a2 and a4 are switched on;
taking phase b as an example: the balance reactor 4 takes any time of 0-2 pi, the voltage difference of the first half period of 0-pi added to the two sections of the thyristors b1 and b3 is a positive value, and the thyristors b1 and b3 are conducted; the voltage difference between two sections of the thyristors b2 and b4 in the second half period pi-2 pi is a negative value, and the thyristors b2 and b4 are switched on;
taking phase c as an example: the balance reactor 4 is added to the thyristor c1 in the first half period of 0-pi at any time of 0-2 pi, the voltage difference between the two sections of the c3 is a positive value, and the thyristors c1 and c3 are switched on; the voltage difference between the two sections of the thyristors c2 and c4 in the second half period is negative, and the thyristors c2 and c4 are switched on.
The primary side 1 of the rectifier transformer is connected with a 35kV bus through a vacuum load switch with a self-coupling voltage regulation function, and the model of the vacuum load switch is ZVV III-350D/40.5-10193W. And a voltage regulating mode adopts ZVV III-350D/40.5-10193W vacuum load switches to carry out self-coupling voltage regulation on the side of the rectifier transformer network as rough voltage amplitude regulation.
The balance reactor 4 is divided into four groups of three phases, and each phase of winding is independent.
The utility model has the advantages that: adiponitrile electrolytic rectification circuit with four group's balance reactors, under the condition of not installing the wave filter, improve two anti star rectifier circuits, for adiponitrile electrolysis provides full wave rectification, the current increase is one time, and can eliminate unshakable in one's determination direct current magnetization.
Example 2:
acrylonitrile and electrolyte phosphate are prepared into an aqueous solution or emulsion, and the aqueous solution or emulsion is electrolyzed in an electrolytic bath 5 by electrifying direct current, the acrylonitrile is dimerized and reduced to generate adiponitrile on a cathode, and simultaneously, water electrolysis oxygen evolution and H + supply reaction are generated on an anode.
According to the process conditions, a total of 8 sets of electrolysis systems are adopted, 30 electrolysis baths 5 of each set of system are connected in parallel, a total number of 240 electrolysis baths 5 are used, a single set of design current is 40kA (considering the allowance of 10 percent), and the design voltage is 150V (considering the bath voltage rise condition at the end of the operation of the electrolysis baths 5) is taken as the design basis of the rectifying equipment.
The voltage of the rectifier network side is 35kV, 8 rectification transformers are arranged in total, each rectification transformer is provided with 1 set of electrolysis system and 30 electrolysis baths 5; 8 rectifier transformers divide into 2 groups (series) and every group is 4 respectively, and two sets (8) rectifier transformers constitute 48 equal effect rectifier systems on the 35kV generating line, effectively restrain higher harmonic current.
And in the voltage regulating mode, ZVV III-350D/40.5-10193W vacuum load switches are adopted to carry out self-coupling voltage regulation on the side of the rectification transformer network as coarse voltage amplitude regulation, and pulse triggering phase shift of a thyristor control electrode is used as fine voltage phase regulation.
The cooling mode is that strong oil-water cooling is adopted for rectification. The rectifier is water-cooled by pure water.
The most effective method is to adopt a multiphase rectification wiring system, whether harmonic current and voltage exceed standards or not depends on the capacity of a power grid and the structural phase shift degree of rectification equipment, and whether a filter needs to be additionally arranged or not cannot be determined at present. According to experience, when the power grid capacity is large and the voltage level is high, the multi-phase rectification can meet the requirement of harmonic waves.
The rectification circuit adopts a double-reverse star-shaped controllable rectification circuit with a balance reactor 4, each phase of the secondary side of the transformer is provided with four groups of windings with the same number of turns and the same polarity, and the windings are respectively connected into six groups of three-phase half-wave circuits. The polarity of the secondary side six windings of the transformer is opposite and can be eliminated.
The iron core is magnetized by direct current, and four balance reactors 4 are arranged to ensure that six groups of three-phase half-wave rectification circuits can conduct electricity simultaneously. Compared with a three-phase bridge circuit, the output current of the double-inverted star circuit can be doubled under the condition of adopting the same thyristor.
The double anti-star is connected in parallel and a balance reactor 4 is needed, compared with three-phase bridge rectification, when the secondary voltage is equal, the voltage of the double anti-star is half of that of the three-phase bridge, and the current is twice of that of the three-phase bridge.
The utility model discloses can extensively apply to the harmonic treatment circuit occasion of adiponitrile production technology.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an adiponitrile electrolysis rectifier circuit with four group's balancing reactors, includes rectifier transformer, rectifier cabinet (3) and electrolysis trough (5), rectifier transformer once inclines (1) and links to each other with the 35kV generating line, rectifier transformer secondary side (2) link to each other with electrolysis trough (5) through rectifier cabinet (3), the interior aqueous solution or the emulsion that has acrylonitrile and electrolyte phosphate to formulate of storing of electrolysis trough (5), acrylonitrile forms adiponitrile through the direct current electrolysis after the rectification, its characterized in that: the secondary side (2) of the rectifier transformer adopts a double-reverse star-shaped rectifier circuit, and each phase of the double-reverse star-shaped rectifier circuit is provided with four windings with the same number of turns and opposite polarities, and the windings are respectively connected into six groups of three-phase half-wave circuits; the electrolytic rectification circuit is also provided with four groups of balance reactors (4) with secondary sides, six groups of three-phase half-wave circuits are connected in parallel with the primary side coil of the balance reactor (4), and the middle tap of the primary side coil of the balance reactor (4) is connected with the electrode of the electrolytic tank (5); six groups of three-phase half-wave rectification circuits can be conducted simultaneously, and each group bears half of load; the conducting path of the double reversed star-shaped rectifying circuit is connected to the electrode of the electrolytic cell (5) through one rectifying tube voltage drop of the rectifying cabinet (3).
2. An adiponitrile electrolytic rectification circuit with four groups of balance reactors as in claim 1, wherein the ends of each double anti-star rectification circuit are connected with the anode of one controllable rectification device and the cathode of another controllable rectification device, and the controllable rectification devices are thyristors.
3. The adiponitrile electrolytic rectification circuit with four groups of balance reactors according to claim 2, characterized in that the balance reactor (4) takes any time of 0-2 pi, the voltage difference of the first half period of 0-pi added to the thyristor a1 and the two sections of a3 is positive, and the thyristors a1 and a3 are switched on; the voltage difference of two sections of the thyristor a2 and a4 is a negative value in the second half period of pi-2 pi, and the thyristors a2 and a4 are switched on;
the balance reactor (4) takes any time of 0-2 pi, the voltage difference of the first half period of 0-pi added to the two sections of the thyristors b1 and b3 is a positive value, and the thyristors b1 and b3 are switched on; the voltage difference between two sections of the thyristors b2 and b4 in the second half period pi-2 pi is a negative value, and the thyristors b2 and b4 are switched on;
the balance reactor (4) takes any time of 0-2 pi, the voltage difference of the first half period of 0-pi is added to the thyristor c1, the voltage difference of the two sections of c3 is a positive value, and the thyristors c1 and c3 are switched on; the voltage difference between the two sections of the thyristors c2 and c4 in the second half period is negative, and the thyristors c2 and c4 are switched on.
4. An adiponitrile electrolytic rectification circuit with four groups of balance reactors as in claim 2, wherein the controllable rectification device trigger signal is two double inverted star trigger signals with phase difference in the same period.
5. The adiponitrile electrolytic rectification circuit with four groups of balance reactors as claimed in claim 1, characterized in that the primary side (1) of the rectification transformer is connected with a 35kV bus through a vacuum load switch with an autotransformer function, and the vacuum load switch is ZVV III-350D/40.5-10193W in model.
6. The adiponitrile electrolytic rectification circuit with four groups of balance reactors according to claim 1, characterized in that the balance reactors (4) are divided into four groups of three phases, each phase winding being independent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921333627.3U CN210458378U (en) | 2019-08-15 | 2019-08-15 | Adiponitrile electrolysis rectifier circuit with four groups of balance reactors |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921333627.3U CN210458378U (en) | 2019-08-15 | 2019-08-15 | Adiponitrile electrolysis rectifier circuit with four groups of balance reactors |
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| CN210458378U true CN210458378U (en) | 2020-05-05 |
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