CN210143150U - High-frequency high-voltage arc striking power supply for long-distance single-anode plasma torch - Google Patents
High-frequency high-voltage arc striking power supply for long-distance single-anode plasma torch Download PDFInfo
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- CN210143150U CN210143150U CN201920725770.0U CN201920725770U CN210143150U CN 210143150 U CN210143150 U CN 210143150U CN 201920725770 U CN201920725770 U CN 201920725770U CN 210143150 U CN210143150 U CN 210143150U
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Abstract
The utility model relates to an environmental protection technology field, concretely relates to remote single positive pole plasma torch high frequency high pressure arc starting power, this power is including isolation transformer TB1, isolation transformer TB1 once inclines and connects the 380V alternating current through ac contactor KM1, isolation transformer TB2 secondary side loops through one, secondary filter is connected to the once side of step-up transformer TB2, high frequency resonance circuit is connected to the secondary side of step-up transformer TB2, output terminal of high frequency resonance circuit is connected to plasma torch positive pole through plasma torch arc starting circuit, another terminal is connected to plasma torch negative pole through plasma torch arc starting circuit, the dc power supply positive pole connects plasma torch positive pole, the dc power supply negative pole is connected to plasma torch negative pole through high-voltage ac contactor KM2, ac contactor KM1, KM2 all is through PLC control. The utility model discloses the operation is stable, reliable, and degree of automation is high, and the success rate of striking an arc 100%.
Description
Technical Field
The utility model relates to the technical field of environmental protection, concretely relates to remote single anode plasma torch high frequency high voltage arc starting power.
Background
At present, the most advanced equipment for treating domestic and foreign garbage is a plasma gasification furnace, and an arc ignition power supply of a plasma torch is the key for normal operation of the plasma gasification furnace. The main process technologies for hazardous waste treatment and disposal are incineration (rotary kiln, waste liquid incinerator and pyrolysis furnace), physicochemical (filtration, neutralization, oxidation reduction, air flotation, coagulation, precipitation, emulsion breaking, ultrafiltration, multiple-effect evaporation, MVR evaporation, advanced oxidation, solid-liquid separation and the like), solidification (stabilization solidification, cement solidification, lime solidification and fly ash solidification), comprehensive utilization (waste oil regeneration, waste organic solvent distillation and rectification), and the like.
The construction of dangerous and useless safe landfill sites has the dilemma of difficult site selection, and because of the precious land resources, high site selection requirements, more rigid conditions, the adjacent avoidance effect, high construction cost, later-stage field sealing maintenance, potential risk hidden dangers and the like, the actual landing number of safe landfill sites is small.
The residues and the fly ash in the plasma gasification treatment process are melted at high temperature to form vitreous substances, the leaching toxicity of the vitreous substances is far lower than the national standard, and the vitreous substances can be comprehensively utilized as common building materials, so the advancement of the plasma gasification technology has wide application prospect, the market potential of hazardous wastes in China is high, the actual treatment gap is large, the innovation process of the plasma technology from test to industrialization, automation, large-scale and modernization steps into a high-speed stage, and the process improvement can be leaped forward suddenly.
The plasma gasification technology is just started in China, the low-power plasma torch arc ignition power supply below 200KW is mainly used at present, the high-frequency high-voltage arc ignition power supply of the plasma torch above 300KW is in a trial operation stage in China at present, most of the high-frequency high-voltage arc ignition power supplies are unstable in arc ignition and often fail in arc ignition, arc ignition can be performed at a short distance sometimes, and arc ignition over 20 meters is very difficult. Generally, a plasma power supply is arranged in a distribution room, a plasma torch and an arc striking cabinet are arranged on the site, the distance between the two devices is far, the arc striking cabinet can strike arcs by disconnecting a direct current power supply line from the site, and the arc striking cabinet cannot strike arcs by disconnecting a direct current power supply output line from the distribution room is mainly caused by large line attenuation.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims to provide a: the high-frequency high-voltage arc striking power supply for the long-distance single-anode plasma torch is stable and reliable in operation, high in automation degree and 100% in arc striking success rate.
The utility model discloses a solve the technical scheme that its technical problem adopted and do:
the remote single-anode plasma torch high-frequency high-voltage arc ignition power supply comprises an isolation transformer TB1, a primary filter, a secondary filter, a boosting transformer TB2, a high-frequency resonance circuit and a plasma torch arc ignition circuit, wherein a primary side of the isolation transformer TB1 is connected with 380V alternating current through an alternating current contactor KM1, a secondary side of an isolation transformer TB1 is connected to a primary side of a boosting transformer TB2 through the primary filter and the secondary filter in sequence, a secondary side of a boosting transformer TB2 is connected with the high-frequency resonance circuit, one of two output terminals of the high-frequency resonance circuit is connected to an anode of a plasma torch through the plasma torch arc ignition circuit, the other of the two output terminals of the high-frequency resonance circuit is connected to a cathode of the plasma torch through the plasma torch arc ignition circuit, a positive electrode of a direct current power supply is connected with the anode, alternating current contactors KM1 and KM2 are controlled by a PLC, the input end of the PLC is also connected with an arc starting button QD, an arc starting stop button TZ, a plasma power supply current detection piece and a plasma power supply voltage detection piece, and a high-frequency resonance circuit and a plasma torch arc starting circuit are arranged nearby relative to a plasma torch.
The utility model discloses keep apart 380V 50Hz alternating current power supply inlet wire and step down to 220V 50Hz through isolation transformer TB1, then in proper order one-level filter and secondary filter high frequency and low frequency that do not need are whole to be strained, have only kept the standard frequency that does not contain the harmonic that the striking needs, have guaranteed the stability of striking circuit frequency, and the pure degree that designs two-stage filter assurance frequency is one of the key that the striking becomes defeated. In addition, in order to prevent the situation that the high-frequency high-voltage arc ignition power supply is greatly attenuated due to circuit growth, a step-up transformer TB2 is arranged to step up the power supply, and then the power supply is connected to the anode and the cathode of the plasma torch through a high-frequency resonance circuit and a plasma torch arc ignition circuit, so that the circuit attenuation can be effectively prevented while the circuit length is met, and the plasma torch arc ignition circuit is the second key for realizing the long-distance arc ignition success.
After an arc starting button QD is pressed, an alternating current contactor KM1 connects a 380V/50Hz alternating current power supply to the primary side of an isolation transformer TB1, the arc starting power supply starts to work, a plasma power supply current detection piece and a plasma power supply voltage detection piece detect the current and the voltage of a plasma direct current power supply, when the current and the voltage of the plasma direct current power supply reach set values, time delay is carried out for 1-5 seconds, a high-voltage alternating current contactor KM2 is closed to connect the negative electrode of the plasma torch direct current power supply to the cathode of the plasma torch, the alternating current contactor KM1 is cut off after time delay is carried out for 1-5 seconds.
Wherein, the preferred scheme is as follows:
the first-stage filter adopts a low-pass filter, and the second-stage filter adopts a common-mode filter.
The high-frequency resonant circuit comprises a capacitor C6 and a boosting hollow inductor L2 which are connected in series, one output connector A17 of the boosting hollow inductor L2 is connected to the anode of the plasma torch through the plasma torch arc striking circuit, the other output connector B15 of the boosting hollow inductor L2 is connected to the cathode of the plasma torch, and a power supply boosted by a boosting transformer TB2 is subjected to secondary boosting through the boosting hollow inductor L2 so as to further avoid the problem of circuit attenuation.
The plasma torch arc ignition circuit comprises resistors R2 and R3 which are connected in parallel between the positive pole and the negative pole of a plasma torch direct current power supply, and a resistor R2 is connected in parallel with a capacitor C7. When in arc striking, the arc striking current does not pass through the resistor R2 through the capacitor C7, the plasma direct current power supply current passes through the resistor R2 and does not pass through the capacitor C7 during normal operation, the distance between the resistors R2 and R3, the capacitor C7, the boosting hollow inductor L2 and the plasma torch is short, the arc striking current passes through the arc striking circuit formed by the boosting hollow inductor L2, the resistors R2 and R3 and the capacitor C7 and is irrelevant to the distance between the plasma direct current power supply and the distance between the resistors R2 and R3, the capacitor C7 and the boosting hollow inductor L2 are the key of long-distance arc striking.
Two ends of 380V alternating current are connected to the primary side of an isolation transformer TB1 through a breaker ZK1 and a normally closed contact of an alternating current contactor KM1, a coil of the alternating current contactor KM1 is connected to an alternating current power supply through a normally open contact of an intermediate relay ZJ1, a normally open contact of the alternating current contactor KM1 is connected to the input end of a PLC, a coil of a high-voltage alternating current contactor KM2 is connected to the alternating current power supply through a normally open contact of an intermediate relay ZJ2, a normally open contact of an alternating current contactor KM2 is connected with the cathode output end of a plasma torch in series, coils of intermediate relays ZJ1 and ZJ2 are connected to the output end of the PLC, after an arc striking start button QD is pressed, the PLC is electrified through the coil of the intermediate relay ZJ1, the normally open contact of the intermediate relay ZJ1 is attracted, a coil of the alternating current contactor KM1 is electrified, the normally open contact, delaying for 1-5 seconds, attracting a PLC intermediate relay ZJ2 and an alternating current contactor KM2, connecting the negative electrode of a direct current power supply of the plasma torch with the negative electrode of the plasma torch, delaying for 1-5 seconds, cutting off the power supply of the alternating current contactor KM1, and completing arc striking.
PLC still connects communication module and display screen, and the display screen preferentially adopts touch display screen, and the accessible display screen sets up and inquires about the equipment behavior, and the communication adopts the RS485 interface, can upload data, realizes remote monitoring.
And the two ends of the primary side of the isolation transformer TB1 are connected with a filter capacitor C1-2.
And the secondary side of the step-up transformer TB2 is connected with a high-voltage discharge tube WZ in parallel and is used for detecting whether high voltage exists on the secondary side of the step-up transformer TB 2.
The output end of the PLC is connected with a power transmission indicator light XD1 and a power failure indicator light XD 2.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses the operation is stable, reliable, and degree of automation is high, and the striking success rate 100%, mark high frequency high pressure striking power technology and begin to use on plasma gasification burner, and high frequency high pressure striking technology is the most advanced control mode of present international internal striking power, the most outstanding power of striking effect. The equipment isolates and reduces the 380V/50Hz alternating current power supply inlet wire to 220V/50Hz through an isolation transformer TB1, then a first-stage filter and a second-stage filter sequentially filter out unnecessary high frequency and low frequency, only the standard frequency which is required by arc striking and does not contain harmonic waves is reserved, the stability of the frequency of an arc striking circuit is ensured, and the design of the two-stage filter ensures that the purity degree of the frequency is the key of arc striking failure. In addition, in order to prevent the high-frequency high-voltage arc ignition power supply from being greatly attenuated due to line length, a step-up transformer TB2 is arranged to step up the power supply, then the power supply is connected to the anode and the cathode of the plasma torch through a high-frequency resonance circuit and a plasma torch arc ignition circuit, electrical components of the arc ignition power supply are arranged nearby relative to the plasma torch, and the line attenuation can be effectively prevented while the line length of the plasma direct-current power supply is met.
Drawings
Fig. 1 is an electrical schematic diagram of embodiment 1.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings:
example 1:
as shown in fig. 1, the high-frequency high-voltage arc-striking power supply for remote single-anode plasma torch comprises an isolation transformer TB1, a primary filter, a secondary filter, a step-up transformer TB2, a high-frequency resonance circuit and a plasma torch arc-striking circuit, wherein a primary side of the isolation transformer TB1 is connected with 380V alternating current through an alternating current contactor KM1, a secondary side of the isolation transformer TB1 is connected with a primary side of the step-up transformer TB2 through the primary filter and the secondary filter in sequence, a secondary side of the step-up transformer TB2 is connected with the high-frequency resonance circuit, one of two output terminals of the high-frequency resonance circuit is connected to an anode of the plasma torch through the plasma torch arc-striking circuit, the other of the two output terminals of the high-frequency resonance circuit is connected to a cathode of the plasma torch through the plasma torch arc-striking circuit, a positive electrode of the, alternating current contactors KM1 and KM2 are controlled by a PLC, the input end of the PLC is also connected with an arc starting button QD, an arc starting stop button TZ, a plasma power supply current detection piece and a plasma power supply voltage detection piece, and a high-frequency resonance circuit and a plasma torch arc starting circuit are arranged nearby relative to a plasma torch.
The high-frequency resonant circuit comprises a capacitor C6 and a boosting hollow inductor L2 which are connected in series, one output connector A17 of the boosting hollow inductor L2 is connected to the anode of the plasma torch through the plasma torch arc striking circuit, the other output connector B15 of the boosting hollow inductor L2 is connected to the cathode of the plasma torch, and a power supply boosted by a boosting transformer TB2 is subjected to secondary boosting through the boosting hollow inductor L2 so as to further avoid the problem of circuit attenuation.
The plasma torch arc ignition circuit comprises resistors R2 and R3 which are connected in parallel between the positive pole and the negative pole of a plasma torch direct current power supply, and a resistor R2 is connected in parallel with a capacitor C7. When in arc striking, the arc striking current does not pass through the resistor R2 through the capacitor C7, the plasma direct current power supply current passes through the resistor R2 and does not pass through the capacitor C7 when in normal operation, the distance is short because the resistors R2 and R3, the capacitor C7, the boosting hollow inductor L2 and the plasma torch are all on site, and the arc striking current passes through the arc striking circuit formed by the boosting hollow inductor L2, the resistors R2, R3 and the capacitor C7 and is irrelevant to the distance of the plasma direct current power supply, so the resistors R2 and R3, the capacitor C7 and the boosting hollow inductor L2 are the key of long-distance arc striking; 380V alternating current two ends are connected to the primary side of an isolation transformer TB1 through a breaker ZK1 and a normally closed contact of an alternating current contactor KM1, an alternating current contactor KM1 coil is connected to an alternating current power supply through a normally open contact of an intermediate relay ZJ1, a normally open contact of an alternating current contactor KM1 is connected to a PLC input end, a coil of a high-voltage alternating current contactor KM2 is connected to the alternating current power supply through a normally open contact of an intermediate relay ZJ2, a normally open contact of an alternating current contactor KM2 is connected with the cathode output end of a plasma torch direct current power supply in series, coils of intermediate relays Z1 and ZJ2 are connected to a PLC output end, after an arc striking start button QD is pressed, the PLC is electrified through the coil of the intermediate relay ZJ1, the normally open contact of the intermediate relay ZJ1 is attracted, the coil of the alternating current contactor KM1 is electrified, the normally open contact of the alternating current contactor, delaying for 1-5 seconds, attracting a PLC intermediate relay ZJ2 and an alternating current contactor KM2, connecting the negative electrode of a direct current power supply of the plasma torch with the negative electrode of the plasma torch, delaying for 1-5 seconds, cutting off the power supply of the alternating current contactor KM1, and completing arc striking; the PLC is also connected with a communication module and a display screen, the display screen preferably adopts a touch display screen, the running condition of the equipment can be set and inquired through the display screen, for example, the delay time, the preset current, the preset voltage value and the like are set, and the communication adopts an RS485 interface, so that data can be uploaded, and the remote monitoring is realized; the two ends of the primary side of the isolation transformer TB1 are connected with a filter capacitor C1-2; the secondary side of the step-up transformer TB2 is connected with a high-voltage discharge tube WZ in parallel and used for detecting whether high voltage exists on the secondary side of the step-up transformer TB 2; the PLC output end is connected with a power transmission indicator light XD1 and a power failure indicator light XD 2.
The utility model discloses keep apart 380V 50Hz alternating current power supply inlet wire and step down to 220V 50Hz through isolation transformer TB1, then in proper order one-level filter and secondary filter high frequency and low frequency that do not need are whole to be strained, have only kept the standard frequency that does not contain the harmonic that the striking needs, have guaranteed the stability of striking circuit frequency, and the pure degree that designs two-stage filter assurance frequency is one of the key that the striking becomes defeated. In addition, in order to prevent the situation that the high-frequency high-voltage arc ignition power supply is greatly attenuated due to circuit growth, a step-up transformer TB2 is arranged to step up the power supply, and then the power supply is connected to the anode and the cathode of the plasma torch through a high-frequency resonance circuit and a plasma torch arc ignition circuit, so that the circuit attenuation can be effectively prevented while the circuit length is met, and the plasma torch arc ignition circuit is the second key for realizing the long-distance arc ignition success.
The arc striking method by using the remote single-anode plasma torch high-frequency high-voltage arc striking power supply comprises the following steps:
the plasma torch comprises a first step, an arc starting button QD is pressed down, a closed normally-open node of an intermediate relay ZJ1 supplies power to an alternating current contactor KM1 coil, a normally-open node of an alternating current contactor KM1 is closed to supply power to an arc starting power supply, high-frequency high-voltage electricity is output by a boosting hollow inductor L2 in a secondary mode, a terminal A17 of the boosting hollow inductor L2 reaches the anode of a plasma torch through a resistor R3 capacitor C7, the other output end of the boosting hollow inductor L2 is connected to the cathode of the plasma torch, the auxiliary normally-open node of the alternating current contactor KM1 feeds back to the input end of the. The positive output of the plasma direct-current power supply passes through the plasma torch anode, and the plasma torch cathode is boosted by the hollow inductor L2 and reaches the negative electrode of the plasma direct-current power supply to form a direct-current loop;
secondly, respectively detecting the current and the voltage of the plasma direct-current power supply through a current sensor and a voltage sensor, sending the current and the voltage values to a PLC (programmable logic controller), judging whether the current and the voltage values reach preset values by the PLC, if so, delaying for 1-5 seconds, and controlling the attraction of a normally-open contact of a high-voltage alternating-current contactor KM2 by the PLC;
and thirdly, after the normally open contact of the high-voltage alternating current contactor KM2 is attracted, connecting a direct current power supply of the plasma torch to a cathode and an anode of the plasma torch, detecting the output current and voltage of the direct current power supply of the plasma torch through a current sensor and a voltage sensor, sending the current and voltage values to a PLC (programmable logic controller), and cutting off the normally closed contact of the alternating current contactor KM1 in 1-5 seconds after the output current value and the voltage value are stable, so that arc striking is completed.
The delay time and the preset current and voltage value of the plasma direct-current power supply can be adjusted through the touch screen.
Claims (9)
1. A remote single-anode plasma torch high-frequency high-voltage arc ignition power supply is characterized by comprising an isolation transformer TB1, a primary filter, a secondary filter, a step-up transformer TB2, a high-frequency resonance circuit and a plasma torch arc ignition circuit, wherein a primary side of the isolation transformer TB1 is connected with 380V alternating current through an alternating current contactor KM1, a secondary side of an isolation transformer TB1 is connected to a primary side of a step-up transformer TB2 through the primary filter and the secondary filter in sequence, a secondary side of a step-up transformer TB2 is connected with the high-frequency resonance circuit, one of two output terminals of the high-frequency resonance circuit is connected to an anode of a plasma torch through the plasma torch arc ignition circuit, the other of the two output terminals of the high-frequency resonance circuit is connected to a cathode of the plasma torch through the plasma torch arc ignition circuit, a positive electrode of a direct current power supply is, alternating current contactors KM1 and KM2 are controlled by a PLC, the input end of the PLC is also connected with an arc starting button QD, an arc starting stop button TZ, a plasma power supply current detection piece and a plasma power supply voltage detection piece, and a high-frequency resonance circuit and a plasma torch arc starting circuit are arranged nearby relative to a plasma torch.
2. The remote single-anode plasma torch high-frequency high-voltage arc ignition power supply according to claim 1, wherein the first-stage filter adopts a low-pass filter, and the second-stage filter adopts a common-mode filter.
3. The remote single-anode plasma torch high-frequency high-voltage arc-striking power supply according to claim 1, wherein the high-frequency resonance circuit comprises a capacitor C6 and a boosting hollow inductor L2 which are connected in series, one output connector A17 of the boosting hollow inductor L2 is connected to the anode of the plasma torch through the plasma torch arc-striking circuit, and the other output connector B15 of the boosting hollow inductor L2 is connected to the cathode of the plasma torch.
4. The remote single-anode plasma torch high-frequency high-voltage arc-striking power supply according to claim 1, wherein the plasma torch arc-striking circuit comprises resistors R2 and R3 which are connected in parallel between the positive electrode and the negative electrode of the plasma torch direct-current power supply, and a capacitor C7 is connected in parallel with the resistor R2.
5. The remote single-anode plasma torch high-frequency high-voltage arc-striking power supply as claimed in claim 1, wherein both ends of 380V alternating current are connected to the primary side of an isolation transformer TB1 through a breaker ZK1 and a normally-open contact of an alternating current contactor KM1, a coil of the alternating current contactor KM1 is connected to an alternating current power supply through a normally-open contact of an intermediate relay ZJ1, a normally-open contact of the alternating current contactor KM1 is connected to a PLC input end, a coil of the high-voltage alternating current contactor KM2 is connected to the alternating current power supply through a normally-open contact of an intermediate relay ZJ2, a normally-open contact of an alternating current contactor KM2 is connected in series with a negative.
6. The remote single anode plasma torch high frequency high voltage arc ignition power supply of claim 1, wherein the PLC further connects a communication module and a display screen.
7. The remote single-anode plasma torch high-frequency high-voltage arc-striking power supply according to claim 1, wherein a filter capacitor C1-2 is connected to two ends of the primary side of the isolation transformer TB 1.
8. The remote single-anode plasma torch high-frequency high-voltage arc-striking power supply according to claim 1, wherein the secondary side of the step-up transformer TB2 is connected with a high-voltage discharge tube WZ in parallel.
9. The remote single-anode plasma torch high-frequency high-voltage arc-striking power supply according to claim 1, wherein the PLC output end is connected with a power-on indicator lamp XD1 and a power-off indicator lamp XD 2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920725770.0U CN210143150U (en) | 2019-05-17 | 2019-05-17 | High-frequency high-voltage arc striking power supply for long-distance single-anode plasma torch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920725770.0U CN210143150U (en) | 2019-05-17 | 2019-05-17 | High-frequency high-voltage arc striking power supply for long-distance single-anode plasma torch |
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| CN210143150U true CN210143150U (en) | 2020-03-13 |
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| CN201920725770.0U Active CN210143150U (en) | 2019-05-17 | 2019-05-17 | High-frequency high-voltage arc striking power supply for long-distance single-anode plasma torch |
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| CN (1) | CN210143150U (en) |
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Effective date of registration: 20210819 Granted publication date: 20200313 |