CN217459622U - Electrolytic cell protection device and electrolytic device - Google Patents
Electrolytic cell protection device and electrolytic device Download PDFInfo
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- CN217459622U CN217459622U CN202221468828.6U CN202221468828U CN217459622U CN 217459622 U CN217459622 U CN 217459622U CN 202221468828 U CN202221468828 U CN 202221468828U CN 217459622 U CN217459622 U CN 217459622U
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Abstract
The utility model discloses an electrolytic cell protection device and an electrolytic device, which relate to the technical field of circuit protection and comprise a control module and N protective branches, wherein each protective branch comprises a voltage transformation module and a rectification module, the positive output end of the rectification module, the anode of the electrolytic cell and the positive output end of a main power supply circuit are connected, the negative output end, the cathode of the electrolytic cell and the negative output end of the main power supply circuit are connected, the control end is connected with the control module, the control module can control the direct current voltage output by each rectification module when the main power supply circuit does not work, finally, the power supply current flowing through the electrolytic cell is kept at the preset cathodic protection current under the condition to prevent the cathode coating of the electrolytic cell from falling off, and when N is an integer larger than 2, a plurality of protective branches are mutually in hot standby, the condition that one protective branch fails to cause the cathodic protection failure of the electrolytic cell is avoided, the safety and the reliability are higher, and the service life of the electrolytic cell is prolonged.
Description
Technical Field
The utility model relates to the technical field of circuit protection, in particular to an electrolytic cell protection device and an electrolytic device.
Background
The electrolytic cell in chlor-alkali industry needs to be powered by direct current voltage when in work, and a main power supply circuit of the electrolytic cell in the prior art comprises a high-power voltage transformation rectifier, a direct current knife switch and the like, so that alternating current voltage output by an alternating current power supply is converted into direct current voltage through the main power supply circuit, thereby supporting the electrolytic work of the electrolytic cell on one hand, and playing a role in cathode protection on the other hand, namely preventing the cathode of the electrolytic cell from discharging outwards, protecting the cathode coating of the electrolytic cell from falling off, and improving the current efficiency of the cathode of the electrolytic cell.
However, when the high-power transformer rectifier fails or the DC knife switch is turned off, the cathode coating of the electrolytic cell is likely to fall off due to the lack of the cathode protection of the electrolytic cell, the device is damaged, and the service life of the electrolytic cell is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an electrolysis trough protection device and electrolytic device guarantees that the supply current who flows through the electrolysis trough keeps predetermineeing cathodic protection current, prevents that electrolysis trough cathode coating from droing, and when N is for being greater than 2 integers, many protection branch roads are each other for hot reserve, and security and reliability are higher, have improved the life of electrolysis trough.
In order to solve the technical problem, the utility model provides an electrolytic tank protection device, which comprises a control module and N protection branches, wherein N is an integer not less than 1; each protection branch comprises a voltage transformation module and a rectification module;
the alternating current power supply, the voltage transformation module and the rectification module are sequentially connected;
the positive output end of each rectifying module, the anode of the electrolytic cell and the positive output end of the main power supply circuit of the electrolytic cell are connected, the negative output end, the cathode of the electrolytic cell and the negative output end of the main power supply circuit are connected, and the control ends are connected with the control module;
the control module is used for controlling the direct-current voltage output by each rectifying module when the main power supply circuit does not work so as to keep the power supply current flowing through the electrolytic cell at a preset cathodic protection current.
Preferably, each protection branch comprises a voltage detection module and a current detection module;
the first input end of the voltage detection module is connected with the positive output end of the rectification module, the second input end of the voltage detection module is connected with the negative output end of the rectification module, and the output end of the voltage detection module is connected with the control module and used for detecting the output voltage of the rectification module;
the first end of the current detection module is connected with the positive output end of the rectification module, the second end of the current detection module is connected with the anode of the electrolytic cell, and the output end of the current detection module is connected with the control module and used for detecting the output current of the rectification module, so that the control module can control the direct-current voltage output by the rectification module based on the output voltage and the output current.
Preferably, each of the protection branches includes:
and the anode of the anti-reverse diode is connected with the positive output end of the rectifying module, and the cathode of the anti-reverse diode is connected with the anode of the electrolytic cell and used for preventing reverse current.
Preferably, the method further comprises the following steps:
and the input end of the filtering module is connected with the positive output end of the rectifying module of each protection branch, and the output end of the filtering module is connected with the anode of the electrolytic cell and used for filtering.
Preferably, each of the protection branches includes:
and one end of the protection module is connected with the positive output end of the rectification module, and the other end of the protection module is connected with the anode of the electrolytic cell and used for cutting off the output of the rectification module when the protection branch in which the protection module is positioned is subjected to overcurrent and/or overvoltage.
Preferably, the rectification module comprises six controllable switches, and control ends of the six controllable switches are connected with the control module;
the first end of the first controllable switch, the first end of the third controllable switch and the first end of the fifth controllable switch are connected, and a common end connected with the first end of the third controllable switch and the first end of the fifth controllable switch is used as an output positive end of the rectifying module;
a second end of the second controllable switch, a second end of the fourth controllable switch and a second end of the sixth controllable switch are connected, and a public end connected with the second end of the fourth controllable switch is used as an output negative end of the rectifying module;
the first controllable switch's second end and second controllable switch's first end connect and the public end of connection with the first phase of vary voltage module output is connected, the third controllable switch's second end and fourth controllable switch's first end connect and the public end of connection with the second phase of vary voltage module output is connected, the fifth controllable switch's second end and sixth controllable switch's first end connect and the public end of connection with the third phase-connection of vary voltage module output.
Preferably, the controllable switch is a thyristor;
the cathode of the thyristor is used as the first end of the controllable switch, the anode of the thyristor is used as the second end of the controllable switch, and the gate of the thyristor is used as the control end of the controllable switch.
Preferably, the method further comprises the following steps:
and the first input end of the grounding monitoring module is connected with the anode of the electrolytic cell, the second input end of the grounding monitoring module is connected with the cathode of the electrolytic cell, the grounding end of the grounding monitoring module is grounded, and the output end of the grounding monitoring module is connected with the control module and is used for detecting a first voltage of the anode of the electrolytic cell to the ground and/or detecting a second voltage of the cathode of the electrolytic cell to the ground, so that the control module can determine the insulation state of the electrolytic cell according to the detection result of the grounding monitoring module.
Preferably, the grounding monitoring module comprises a first resistor, a second resistor, a third resistor and a transmitter;
one end of the first resistor is used as a first input end of the grounding monitoring module, the other end of the first resistor is respectively connected with one end of the second resistor and one end of the third resistor, the other end of the second resistor is used as a second input end of the grounding monitoring module, the other end of the third resistor is connected with an input end of the transmitter, a grounding end of the transmitter is used as a grounding end of the grounding monitoring module, and an output end of the transmitter is used as an output end of the grounding monitoring module.
In order to solve the technical problem, the utility model also provides an electrolysis device, which comprises an electrolysis bath, a main power supply circuit and the electrolysis bath protection device;
the alternating current power supply is connected with the main power supply circuit and the input end of the electrolytic cell protection device, the positive output end of the main power supply circuit is respectively connected with the positive output end of the electrolytic cell protection device and the anode of the electrolytic cell, and the negative output end of the main power supply circuit is respectively connected with the negative output end of the electrolytic cell protection device and the cathode of the electrolytic cell.
The application provides an electrolytic cell protection device and an electrolytic device, comprising a control module and N protective branches, wherein each protective branch comprises a voltage transformation module and a rectification module, the positive output end of the rectification module, the anode of an electrolytic cell and the positive output end of a main power supply circuit are connected, the negative output end, the cathode of the electrolytic cell and the negative output end of the main power supply circuit are connected, the control ends are all connected with the control module, the control module can control the direct current voltage output by each rectification module when the main power supply circuit does not work, and finally ensures that the supply current flowing through the electrolytic cell is kept at the preset cathodic protection current under the condition to prevent the cathode coating of the electrolytic cell from falling off, and when N is an integer larger than 2, a plurality of protective branches are mutually in hot standby, thereby avoiding the condition that the cathode protection of the electrolytic cell fails due to the fault of one protective branch, and the safety and the reliability are higher, the service life of the electrolytic cell is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of an electrolytic cell protection device provided by the present invention;
FIG. 2 is a schematic structural view of another electrolytic cell protection device provided by the present invention;
fig. 3 is a schematic structural diagram of a ground monitoring module provided by the present invention.
Detailed Description
The core of the utility model is to provide an electrolysis trough protection device and electrolytic device, guarantee to flow through the supply current of electrolysis trough and keep predetermineeing cathodic protection electric current, prevent that electrolysis trough cathode coating from droing, when N is for being greater than 2 integers, many protection branch roads are each other for hot reserve, and security and reliability are higher, have improved the life of electrolysis trough.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an electrolytic cell protection device provided by the present invention.
The electrolytic cell protection device comprises a control module 1 and N protection branches, wherein N is an integer not less than 1; each protection branch comprises a voltage transformation module 2 and a rectification module 3;
the alternating current power supply, the transformation module 2 and the rectification module 3 are connected in sequence;
the positive output end of each rectifying module 3, the anode of the electrolytic cell and the positive output end of the main power supply circuit of the electrolytic cell are connected, the negative output end, the cathode of the electrolytic cell and the negative output end of the main power supply circuit are connected, and the control ends are connected with the control module 1;
the control module 1 is used for controlling the direct-current voltage output by each rectifier module 3 when the main power supply circuit does not work, so that the power supply current flowing through the electrolytic cell is kept at the preset cathodic protection current.
In the embodiment, the problem that in the prior art, when the high-power variable-voltage rectifier fails or the direct-current knife switch is switched off, the cathode protection of the electrolytic cell is lacked, the cathode coating of the electrolytic cell is likely to fall off, the device is damaged, and the service life of the electrolytic cell is further shortened is considered. In order to solve the technical problem, the application provides an electrolytic cell protection device which is higher in safety and reliability.
The circuit structure of the electrolytic cell protection device is as described above, and it can be seen that the electrolytic cell protection device and the main power supply circuit are in parallel connection, and the power supply of the main power supply circuit and the power supply of the electrolytic cell protection device are not the same power supply. Specifically, referring to fig. 1, wherein fig. 1 is limited to the space shown in the figures, the control module 1 is given as a circle with a reference number and is described here only by taking N as an example 2. In addition, the high voltage ac power supply in fig. 1 is used to provide ac power input to the main power supply circuit to meet the power supply requirement for normal operation and/or cathodic protection of the electrolytic cell, and the ac power supply is used to provide ac power input to each protection branch to meet the power supply requirement for cathodic protection of the electrolytic cell when the main power supply circuit is not operating.
Specific settings of the control module 1 include, but are not limited to, N control submodules corresponding to the N protection branches one to one, and each control submodule includes, but is not limited to, a DSP (Digital Signal Processing) Controller and/or a PLC (Programmable Logic Controller), and are not particularly limited herein. And as a preferred protection branch setting scheme, N can be an integer not less than 2, so as to realize that a plurality of protection branches are mutually hot standby.
The voltage transformation module 2 includes but is not limited to a step-up transformer or a step-down transformer, which is specifically adopted and set according to actual requirements, and the rectification module 3 may directly use an integrated rectification device, or may be a rectification circuit set according to a three-phase bridge rectification principle, and is not particularly limited herein.
It should be noted that the ac power source includes, but is not limited to, a power grid, and a circuit protection device such as a molded case circuit breaker may be disposed between the ac power source and the transformer module 2 to implement emergency handling during a fault. And the electrolytic bath protection device is also suitable for protecting the ionic membrane in the chlor-alkali industry.
It should be further noted that each of the protection branches may include a bleeding module, so as to release the remaining energy (reverse current) in a certain protection branch when the protection branch is disabled due to a fault, which is not limited herein.
Then, the transforming module 2 may convert the first ac voltage output by the ac power source into a second ac voltage to implement a transforming function, and the second ac voltage may be a voltage having the same frequency as the first ac voltage but different effective values (and the effective value is specifically increased or decreased according to the type of the transformer adopted by the transforming module 2), which is not limited herein; since the electrolyzer protection device provided by the present application only provides a cathodic protection function when the main power supply circuit does not work, the control module 1 can, under such a condition, control the dc voltage output by each rectifier module 3 (here, the control manner may specifically be to send a trigger pulse to a controllable switch in each rectifier module 3) to ensure that the supply current flowing through the electrolyzer is kept at the preset cathodic protection current, specifically, taking N as an example 2, including but not limited to the following control manners: and enabling half of the preset cathodic protection current to be generated by each of the two rectifier modules 3 according to the control requirement, and when one of the rectifier modules 3 breaks down, directly controlling the failed rectifier module 3 to stop outputting and controlling the other rectifier module 3 as a hot standby to generate all the preset cathodic protection current by the control module 1 so as to ensure the cathodic protection function.
In conclusion, the application provides an electrolytic cell protection device, including control module 1 and N way protection branch road, guaranteed under the inoperative condition of main supply circuit, the supply current that flows through the electrolytic cell keeps predetermineeing cathodic protection current, prevent that the electrolytic cell cathode coating from droing, and when N is for being greater than 2 integers, many protection branch roads are each other for hot standby, avoid appearing a protection branch road and break down the condition that causes the electrolytic cell cathodic protection to become invalid, security and reliability are higher, the life of electrolytic cell has been improved.
On the basis of the above-described embodiment:
as a preferred embodiment, each protection branch includes a voltage detection module and a current detection module;
the first input end of the voltage detection module is connected with the positive output end of the rectification module 3, the second input end of the voltage detection module is connected with the negative output end of the rectification module 3, and the output end of the voltage detection module is connected with the control module 1 and used for detecting the output voltage of the rectification module 3;
the first end of the current detection module is connected with the positive output end of the rectifier module 3, the second end of the current detection module is connected with the anode of the electrolytic cell, and the output end of the current detection module is connected with the control module 1 and used for detecting the output current of the rectifier module 3, so that the control module 1 controls the direct-current voltage output by the rectifier module 3 based on the output voltage and the output current.
In this embodiment, in order to more accurately and reliably realize the control function of the control module 1 (i.e., control the trigger pulse output to the controllable switch in the rectifier module 3), each protection branch in the electrolytic cell protection device includes a voltage detection module and a current detection module, wherein the voltage detection module is configured to detect the output voltage of the rectifier module 3 and transmit the output voltage to the control module 1, and the current detection module is configured to detect the output current of the rectifier module 3 and transmit the output current to the control module 1, so that the control module 1 controls the dc voltage output by the rectifier module 3 based on the output voltage and the output current.
It should be noted that, here, the control strategy of the control module 1 specifically for the output dc voltage of the rectifying module 3 may be: based on preset given current or preset given voltage, according to a double-closed-loop PI control algorithm, the trigger pulse of the controllable switches in the rectifier module 3 is determined by combining the output voltage and the output current, so that accurate and reliable control over the controllable switches is realized, the functions of current stabilization, voltage limitation and current stabilization are realized, and the reliable work and the output voltage precision of the rectifier module 3 are ensured.
Specifically, the voltage detection module includes, but is not limited to, a voltage transmitter or other devices and circuits capable of implementing this function, and the current detection module includes, but is not limited to, a dc current sensor, and is not limited herein.
It can be seen that by the arrangement of the above-described devices and corresponding connection structures, a basis can be provided for accurate and reliable control of the control module 1.
Referring to fig. 2, fig. 2 is a schematic structural diagram of another electrolytic cell protection device provided by the present invention. Again taking N as an example, the control module 1 is given in the form of a circle with reference numbers, and it should be noted that, since the circuit connections of the main power supply circuit portion have already been described in fig. 1, the connection of the main power supply circuit portion is temporarily omitted in fig. 2 subject to the illustration space and the emphasis here.
As a preferred embodiment, each protection branch comprises:
and an anti-reverse diode 4, the anode of which is connected with the positive output end of the rectifying module 3, and the cathode of which is connected with the anode of the electrolytic cell, and is used for preventing reverse current.
In this embodiment, in order to avoid the device damage caused by the reverse current surge, the anti-reverse diode 4 may be disposed as described above, and the type and specific number of the anti-reverse diode 4 are not particularly limited, but should meet the requirement of the corresponding voltage withstanding class. Of course, other modules, devices, etc. capable of implementing the current anti-reflection function, such as a modular circuit including a diode, etc., may also be used, and are not particularly limited herein.
As a preferred embodiment, the method further comprises the following steps:
and the input end of the filtering module 6 is connected with the positive output end of the rectifying module 3 of each protection branch, and the output end of the filtering module is connected with the anode of the electrolytic cell and used for filtering.
In this embodiment, in order to implement filtering, the filtering module 6 may be provided as described above, specifically, the filtering module 6 includes, but is not limited to, a reactor.
As a preferred embodiment, each protection branch comprises:
and one end of the protection module 5 is connected with the positive output end of the rectification module 3, and the other end of the protection module is connected with the anode of the electrolytic cell, and is used for cutting off the output of the rectification module 3 when the protection branch in which the protection module is located is in overcurrent and/or overvoltage.
In this embodiment, in order to further implement reliable and safe operation of each protection branch, the protection module 5 may be provided as described above. Specifically, the protection module 5 may be a fuse and/or a protection switch, and when the fuse and the protection switch are included at the same time, the fuse and the protection switch may be directly connected in series. Therefore, for the fuse, the fuse can be fused to cut off the output of the rectifier module 3 to the electrolytic cell when the protection branch where the fuse is located is subjected to overcurrent and/or overvoltage; the protection type disconnecting link can be controlled to be disconnected by the control module 1 when the protection branch circuit where the protection type disconnecting link is located is subjected to overcurrent and/or overvoltage so as to cut off the output of the rectifier module 3 to the electrolytic cell.
Therefore, the electrolytic cell protection device is safer and more reliable by the arrangement of the multiple protection, and better meets the practical application requirements.
As a preferred embodiment, the rectification module 3 includes six controllable switches whose control ends are connected to the control module 1;
the first end of the first controllable switch, the first end of the third controllable switch and the first end of the fifth controllable switch are connected, and the connected common end is used as the output positive end of the rectifying module 3;
the second end of the second controllable switch, the second end of the fourth controllable switch and the second end of the sixth controllable switch are connected, and the connected common end is used as the output negative end of the rectification module 3;
the second end of the first controllable switch is connected with the first end of the second controllable switch, the public end of the third controllable switch is connected with the first end of the fourth controllable switch, the public end of the third controllable switch is connected with the second end of the output end of the voltage transformation module 2, the second end of the fifth controllable switch is connected with the first end of the sixth controllable switch, the public end of the fifth controllable switch is connected with the third end of the output end of the voltage transformation module 2.
In this embodiment, a circuit design manner for the rectification module 3 is provided, which specifically refers to the above description, and details are not repeated here, and each controllable switch implements corresponding on and off actions under the control of the trigger pulse sent by the control module 1, so as to finally implement rectification. It can be seen that under this circuit configuration, reliable control of the dc voltage output by the rectifier module 3 can be achieved by the trigger control of each controllable switch.
As a preferred embodiment, the controllable switch is a thyristor;
the cathode of the thyristor is used as the first end of the controllable switch, the anode of the thyristor is used as the second end of the controllable switch, and the gate of the thyristor is used as the control end of the controllable switch.
In this embodiment, considering that the thyristor is one of the controllable power electronic switches, and has the advantages of small size, light weight, and sensitive trigger response to the control module 1, the controllable switch may be configured as a thyristor, or may be other types of controllable switch devices, and the controllable switch device is not particularly limited herein, and may be configured according to actual requirements.
As a preferred embodiment, the method further comprises the following steps:
and the first input end of the grounding monitoring module 7 is connected with the anode of the electrolytic cell, the second input end of the grounding monitoring module is connected with the cathode of the electrolytic cell, the grounding end of the grounding monitoring module is grounded, and the output end of the grounding monitoring module is connected with the control module 1 and is used for detecting the first voltage of the anode of the electrolytic cell to the ground and/or detecting the second voltage of the cathode of the electrolytic cell to the ground, so that the control module 1 determines the insulation state of the electrolytic cell according to the detection result of the grounding monitoring module 7.
In this embodiment, in order to realize the detection of the insulation state of the electrolytic cell and further improve the safety, the grounding monitoring module 7 may be provided, and the specific circuit connection manner is as described above, and is not described herein again.
Specifically, the anodes of the electrolytic cell are connected with the positive output terminals of the rectifier modules 3 one by one, so that the first voltage for detecting the anode of the electrolytic cell to the ground is the first voltage for detecting the anode of the electrolytic cell to the ground; similarly, the cathodes of the electrolytic cell are connected with the output negative terminals of the rectifier modules 3 one by one, so that the detection of the second voltage of the cathodes of the electrolytic cell to the ground is the detection of the second voltage of the output negative terminals to the ground, and the insulation state of the electrolytic cell (including two states of insulation fault occurrence and insulation fault non-occurrence) can be determined according to the detection result, so that the output of the rectifier modules 3 is stopped when the insulation fault occurs, the equipment is protected, and then fault reporting and the like can be further performed.
Please refer to fig. 3, fig. 3 is a schematic structural diagram of a grounding monitoring module 7 according to the present invention.
As a preferred embodiment, the grounding monitoring module 7 includes a first resistor 71, a second resistor 72, a third resistor 73 and a transmitter 74;
one end of the first resistor 71 serves as a first input end of the ground monitoring module 7, the other end of the first resistor 71 is connected to one end of the second resistor 72 and one end of the third resistor 73, respectively, the other end of the second resistor 72 serves as a second input end of the ground monitoring module 7, the other end of the third resistor 73 is connected to an input end of the transmitter 74, a ground end of the transmitter 74 serves as a ground end of the ground monitoring module 7, and an output end of the transmitter 74 serves as an output end of the ground monitoring module 7.
In this embodiment, a specific circuit configuration structure of the ground monitoring module 7 is provided, which is specifically described above. The resistance values of the first resistor 71, the second resistor 72, and the third resistor 73 are not particularly limited, and are set according to actual requirements.
Specifically, as shown in fig. 3, the circuit operation principle of the ground fault monitoring module 7 is explained: the voltage of the anode and the voltage of the cathode of the electrolytic bath are respectively connected to the first resistor 71 and the second resistor 72, to measure whether there is a voltage difference between the anode (i.e., the positive output terminal) and the cathode (i.e., the negative output terminal) to ground due to an insulation fault, and to transmit a current signal to the transmitter 74 through the third resistor 73, wherein the transmitter 74 can output a signal of 4-20mA, and then the transmitter 74 outputs a current flag signal representing the condition of the current signal to the control module 1, so that the control module 1 can make a judgment according to the current flag signal, and when a specified threshold value is reached, it is determined that an insulation fault occurs, and then the control module 1 may control the rectification module 3 to stop outputting (i.e., to seal a pulse), and perform fault reporting, thereby ensuring the insulation safety of the electrolytic cell protection device and the electrolytic equipment comprising the electrolytic cell, having high safety performance and better meeting the actual safety requirements of factories.
The utility model also provides an electrolysis device, which comprises an electrolysis bath, a main power supply circuit and the electrolysis bath protection device;
the alternating current power supply is connected with the main power supply circuit and the input end of the electrolytic cell protection device, the positive output end of the main power supply circuit is respectively connected with the positive output end of the electrolytic cell protection device and the anode of the electrolytic cell, and the negative output end of the main power supply circuit is respectively connected with the negative output end of the electrolytic cell protection device and the cathode of the electrolytic cell.
For the introduction of the electrolytic device provided in the present invention, please refer to the embodiment of the above electrolytic cell protection device, which is not described herein again.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. 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. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The electrolytic cell protection device is characterized by comprising a control module and N protective branches, wherein N is an integer not less than 1; each protection branch comprises a voltage transformation module and a rectification module;
the alternating current power supply, the voltage transformation module and the rectification module are sequentially connected;
the positive output end of each rectifying module, the anode of the electrolytic cell and the positive output end of the main power supply circuit of the electrolytic cell are connected, the negative output end, the cathode of the electrolytic cell and the negative output end of the main power supply circuit are connected, and the control ends are connected with the control module;
the control module is used for controlling the direct-current voltage output by each rectifying module when the main power supply circuit does not work so as to keep the power supply current flowing through the electrolytic cell at a preset cathodic protection current.
2. The electrolyzer protection device of claim 1 wherein each of the protection branches comprises a voltage detection module and a current detection module;
the first input end of the voltage detection module is connected with the positive output end of the rectification module, the second input end of the voltage detection module is connected with the negative output end of the rectification module, and the output end of the voltage detection module is connected with the control module and used for detecting the output voltage of the rectification module;
the first end of the current detection module is connected with the positive output end of the rectification module, the second end of the current detection module is connected with the anode of the electrolytic cell, and the output end of the current detection module is connected with the control module and used for detecting the output current of the rectification module, so that the control module can control the direct-current voltage output by the rectification module based on the output voltage and the output current.
3. The electrolyzer protection device of claim 1 wherein each of the protection branches comprises:
and the anode of the anti-reverse diode is connected with the positive output end of the rectifying module, and the cathode of the anti-reverse diode is connected with the anode of the electrolytic cell and used for preventing reverse current.
4. The electrolytic cell protection device of claim 1, further comprising:
and the input end of the filtering module is connected with the positive output end of the rectifying module of each protection branch, and the output end of the filtering module is connected with the anode of the electrolytic cell and used for filtering.
5. The electrolyzer protection device of claim 1 wherein each of the protection branches comprises:
and one end of the protection module is connected with the positive output end of the rectification module, and the other end of the protection module is connected with the anode of the electrolytic cell and used for cutting off the output of the rectification module when the protection branch in which the protection module is positioned is subjected to overcurrent and/or overvoltage.
6. The electrolyzer protection device of claim 1 wherein the rectification module comprises six controllable switches having control terminals each connected to the control module;
the first end of the first controllable switch, the first end of the third controllable switch and the first end of the fifth controllable switch are connected, and a common end connected with the first end of the third controllable switch and the first end of the fifth controllable switch is used as an output positive end of the rectifying module;
a second end of the second controllable switch, a second end of the fourth controllable switch and a second end of the sixth controllable switch are connected, and a public end connected with the second end of the fourth controllable switch is used as an output negative end of the rectifying module;
the second end and the fourth of controllable switch the public end that the first end of controllable switch is connected and is connected with the second of vary voltage module output is connected, the fifth the second end and the sixth of controllable switch the public end that the first end of controllable switch is connected and is connected with the second of vary voltage module output is connected with the third phase connection of vary voltage module output.
7. The electrolyzer protection device of claim 6 wherein the controllable switches are thyristors;
the cathode of the thyristor is used as the first end of the controllable switch, the anode of the thyristor is used as the second end of the controllable switch, and the gate of the thyristor is used as the control end of the controllable switch.
8. The electrolytic cell protection device of any one of claims 1 to 7, further comprising:
and the first input end of the grounding monitoring module is connected with the anode of the electrolytic cell, the second input end of the grounding monitoring module is connected with the cathode of the electrolytic cell, the grounding end of the grounding monitoring module is grounded, and the output end of the grounding monitoring module is connected with the control module and is used for detecting a first voltage of the anode of the electrolytic cell to the ground and/or detecting a second voltage of the cathode of the electrolytic cell to the ground, so that the control module can determine the insulation state of the electrolytic cell according to the detection result of the grounding monitoring module.
9. The electrolyzer protection device of claim 8 wherein the grounding monitoring module comprises a first resistor, a second resistor, a third resistor and a transmitter;
one end of the first resistor is used as a first input end of the grounding monitoring module, the other end of the first resistor is respectively connected with one end of the second resistor and one end of the third resistor, the other end of the second resistor is used as a second input end of the grounding monitoring module, the other end of the third resistor is connected with an input end of the transmitter, a grounding end of the transmitter is used as a grounding end of the grounding monitoring module, and an output end of the transmitter is used as an output end of the grounding monitoring module.
10. An electrolysis apparatus comprising an electrolysis cell and a main power supply circuit, further comprising an electrolysis cell protection device according to any one of claims 1 to 9;
the alternating current power supply is connected with the main power supply circuit and the input end of the electrolytic cell protection device, the positive output end of the main power supply circuit is respectively connected with the positive output end of the electrolytic cell protection device and the anode of the electrolytic cell, and the negative output end of the main power supply circuit is respectively connected with the negative output end of the electrolytic cell protection device and the cathode of the electrolytic cell.
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| CN202221468828.6U CN217459622U (en) | 2022-06-13 | 2022-06-13 | Electrolytic cell protection device and electrolytic device |
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| CN202221468828.6U CN217459622U (en) | 2022-06-13 | 2022-06-13 | Electrolytic cell protection device and electrolytic device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116008755A (en) * | 2023-02-07 | 2023-04-25 | 深圳新立图智能科技有限公司 | Method and system for detecting multipoint grounding of electrolytic tank based on voltage response of injection signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116008755A (en) * | 2023-02-07 | 2023-04-25 | 深圳新立图智能科技有限公司 | Method and system for detecting multipoint grounding of electrolytic tank based on voltage response of injection signal |
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