High no-load plasma incineration power supply

Abstract

The utility model provides a high no-load plasma incineration power supply, and belongs to the technical field of plasma power supplies. The high no-load incineration power supply is connected with a cutting gun head and comprises a main transformer, the left side of the main transformer is connected with an inverter circuit, the right side of the main transformer is connected with a high-frequency rectification and arc striking unit, and the high-frequency rectification and arc striking unit comprises a main electric circuit, an auxiliary electric circuit, a main and auxiliary switching circuit, a high-frequency arc striking absorption circuit, a bypass circuit and a high-frequency high-voltage transformer. And the problems of arc length and arc striking energy of the non-transferred arc are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of plasma power supplies, in particular to a high-noise plasma incineration power supply. Background Art

[0002] Plasma combustion technology uses direct current air plasma as an ignition source, enabling oil-free ignition from a cold start of the boiler without requiring a single drop of oil. Plasma promotes combustion. A plasma combustion system primarily consists of a combustion system, air-powder system, plasma generator, electrical system, plasma air system, and plasma cooling water system. Plasma technology is a treatment method for incinerating solid and liquid waste. The high temperatures generated by plasma (which can reach over 10,000K) decompose or oxidize pollutants, breaking down complex organic matter into simpler molecules for removal. This technology can treat a variety of hazardous wastes, including transformer oil used in substations, asbestos, and low-level radioactive waste from nuclear power plants. The high furnace temperature allows for thorough decomposition of pollutants, avoiding the generation of toxic substances such as dioxins that can occur with incomplete combustion using conventional incineration methods. The plasma arc used in incineration power supplies is primarily a non-transferred arc. Because the materials being burned are mostly insulating, a non-transferred arc is required for combustion. Conventional plasma suffers from insufficient initial energy and arc length, resulting in incombustion of some materials. In addition to the torch itself, the design of the plasma power supply has a great influence on the arc length and arc ignition energy of the non-transferred arc.

[0003] The above problems are in urgent need of resolution. Utility Model Content

[0004] The utility model aims to overcome the problems in the prior art of difficulty in striking an arc at low no-load and short non-transferred arc.

[0005] The utility model provides a high-no-load plasma incineration power supply, which is connected to a cutting gun head and includes a main transformer. The left side of the main transformer is connected to an inverter circuit, and the right side is connected to a high-frequency rectification and arc striking unit. The high-frequency rectification and arc striking unit includes a main power circuit, a secondary power circuit, a main-secondary switching circuit, a high-frequency arc striking absorption circuit, a bypass circuit and a high-frequency high-voltage transformer; the first end of the main power circuit is connected to the main transformer, the second end of the main power circuit is connected to the first end of the main-secondary switching circuit, the first end of the secondary power circuit is connected to the main transformer, the second end of the secondary power circuit is connected to the second end of the main-secondary switching circuit, and the main The first end of the auxiliary switching circuit is connected to the first end of the bypass circuit, the second end of the main-auxiliary switching circuit is connected to the second end of the bypass circuit, the first end of the bypass circuit is connected to the third end of the high-frequency arc ignition absorption circuit, the second end of the bypass circuit is connected to the second end of the high-frequency arc ignition absorption circuit, the first end of the high-frequency arc ignition absorption circuit is connected to the nozzle of the cutting gun head, the second end of the high-frequency arc ignition absorption circuit is also connected to the high-frequency high-voltage transformer, the high-frequency high-voltage transformer is connected to the electrode of the cutting gun head, and the third end of the high-frequency arc ignition absorption circuit is also connected to the workpiece. During ignition, the no-load voltage is increased through the auxiliary circuit, thereby improving the non-arcing length and arc ignition capability of the plasma incineration power supply.

[0006] Furthermore, the high-frequency rectification and arc striking unit further includes a load inductor L3, which is connected to the main transformer and is used to protect the circuit when it is no-load.

[0007] Furthermore, a current sensor H1 and an inductor L4 connected in series with the current sensor H1 are further included between the bypass circuit and the high-frequency arc ignition absorption circuit.

[0008] Furthermore, the main power circuit includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fourth resistor R4, a twelfth capacitor C12, a thirteenth capacitor C13, a fifth resistor R5, a sixth resistor R6, a fourteenth capacitor C14, a fifteenth capacitor C15, and a seventh resistor R7; the first diode D1 and the second diode D2 are connected in parallel in the same direction, and are connected in parallel with the fourth resistor R4 and the twelfth capacitor C12 connected in series, and in parallel with the sixth resistor R6 and the fourteenth capacitor C14 connected in series; the third diode D3 and the fourth diode D4 are connected in parallel in the same direction, and are connected in parallel with the thirteenth capacitor C13 and the fifth resistor R5 connected in series, and are connected in parallel with the fifteenth capacitor C15 and the seventh resistor R7 connected in series; the fourteenth capacitor C14 is connected to the fifteenth capacitor C15, and the twelfth capacitor C12 is connected to the thirteenth capacitor C13.

[0009] Furthermore, the secondary circuit includes a fifth diode D5, a sixth diode D6, a seventh diode D7, an eighth diode D8, an eighth resistor R8, a sixteenth capacitor C16, a ninth resistor R9, and a seventeenth capacitor C17; the fifth diode D5 and the sixth diode D6 are connected in parallel in the same direction, and then connected in parallel with the eighth resistor R8 and the sixteenth capacitor C16 connected in series; the seventh diode D7 and the eighth diode D8 are connected in parallel in the same direction, and then connected in parallel with the ninth resistor R9 and the seventeenth capacitor C17 connected in series; the anode of the sixth diode D6 is connected to the cathode of the eighth diode D8, and the anode of the fifth diode D5 is connected to the cathode of the seventh diode D7.

[0010] Furthermore, the master-slave switching circuit includes an insulated gate bipolar transistor V1 and a ninth diode D9, wherein the collector of the insulated gate bipolar transistor V1 is connected to the cathode of the ninth diode D9, and the emitter of the insulated gate bipolar transistor V1 is connected to the anode of the ninth diode D9.

[0011] Furthermore, the bypass circuit includes a tenth diode D10 and an eleventh diode D11 , and the tenth diode D10 and the eleventh diode D11 are connected in parallel in the same direction.

[0012] Furthermore, the high-frequency arc ignition absorption circuit includes a high-frequency arc ignition absorption plate, a tenth resistor R10 and an eleventh resistor R11. The tenth resistor R10 and the eleventh resistor R11 are connected in series and connected to the high-frequency arc ignition absorption plate. The high-frequency arc ignition absorption circuit is used to absorb the high frequency and high voltage when the cutting torch starts arcing.

[0013] Furthermore, the high-frequency arc absorbing plate is of model NSC-8.

[0014] Furthermore, the diodes D1, D2, D3, D4, D5, D6, D7, D8, D10 and D11 are all fast recovery diodes.

[0015] The beneficial effects of the present invention are as follows: the present invention provides a high-no-load plasma incineration power supply, which is connected to a cutting gun head and includes a main transformer, the left side of the main transformer is connected to an inverter circuit, and the right side is connected to a high-frequency rectification and arc striking unit, the high-frequency rectification and arc striking unit includes a main power circuit, a secondary power circuit, a main-secondary switching circuit, a high-frequency arc striking absorption circuit, a bypass circuit and a high-frequency high-voltage transformer; the first end of the main power circuit is connected to the main transformer, the second end of the main power circuit is connected to the first end of the main-secondary switching circuit, the first end of the secondary power circuit is connected to the main transformer, the second end of the secondary power circuit is connected to the second end of the main-secondary switching circuit The first end of the main-sub switching circuit is connected to the first end of the bypass circuit, the second end of the main-sub switching circuit is connected to the second end of the bypass circuit, the first end of the bypass circuit is connected to the third end of the high-frequency arc ignition absorption circuit, the second end of the bypass circuit is connected to the second end of the high-frequency arc ignition absorption circuit, the first end of the high-frequency arc ignition absorption circuit is connected to the nozzle of the cutting gun head, the second end of the high-frequency arc ignition absorption circuit is also connected to a high-frequency high-voltage transformer, the high-frequency high-voltage transformer is connected to the electrode of the cutting gun head, and the third end of the high-frequency arc ignition absorption circuit is also connected to the workpiece. During ignition, the no-load voltage is increased through the auxiliary circuit, thereby improving the non-transferred arc length and arc ignition capability of the plasma incineration power supply. The no-load voltage is increased by the auxiliary circuit to a range of 500-1500V. The main and auxiliary circuits are switched through the main-sub switching circuit. After successful ignition, the auxiliary circuit is disconnected through V1, switching to full operation by the main circuit, and the output current is increased to the set current. This effectively solves the problems of arc length and arc ignition energy of the non-transferred arc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of a high-noise plasma incineration power supply structure provided by an embodiment of the utility model.

[0018] Figure 2 This is a topology diagram of a high no-load plasma incineration power supply circuit provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0019] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the various operations as sequential processes, many of the operations therein can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the various operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0020] It should be understood that although the terms "first," "second," and the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used solely to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of the exemplary embodiments. The term "and / or" as used herein includes any and all combinations of one or more of the listed associated items.

[0021] The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0022] Example 1

[0023] To facilitate subsequent understanding, the working principle is explained here: At the moment of ignition, the main power circuit and the auxiliary power circuit are connected in series through V1 in the main-auxiliary switching circuit. The maximum no-load voltage of the main power circuit can reach 500V, and the maximum no-load voltage of the auxiliary power circuit can reach 1000V. Both are boosted through the transformer winding. The difference is that the main power will have a larger current when working normally, and the auxiliary power only works at the moment of ignition, and the arc striking current is very small (the ignition arc striking current is very small, generally 20A-30A). When the ignition is successful, the auxiliary power is disconnected by V1 and switched to the main power working completely, and the output current rises to the set current.

[0024] like Figure 1 -2 is a schematic diagram of the structure of a high-load plasma incineration power supply provided by the present invention.

[0025] As an example, the high-noise plasma incineration power supply is connected to the cutting gun head, including a main transformer T1, the left side of the main transformer T1 is connected to the inverter circuit, and the right side is connected to the high-frequency rectification and arc striking unit 1, the high-frequency rectification and arc striking unit includes a main power circuit 110, a secondary power circuit 120, a main-secondary switching circuit 130, a high-frequency arc striking absorption circuit 140, a bypass circuit 150 and a high-frequency high-voltage transformer 160; the first end of the main power circuit 110 is connected to the main transformer T1, the second end of the main power circuit 110 is connected to the first end of the main-secondary switching circuit 130, the first end of the secondary power circuit 120 is connected to the main transformer T1, the second end of the secondary power circuit 120 is connected to the second end of the main-secondary switching circuit 130, and the main-secondary switching circuit The first end of the circuit 130 is connected to the first end of the bypass circuit 150, the second end of the main-sub switching circuit 130 is connected to the second end of the bypass circuit 150, the first end of the bypass circuit 150 is connected to the third end of the high-frequency arc ignition absorption circuit 140, the second end of the bypass circuit 150 is connected to the second end of the high-frequency arc ignition absorption circuit 140, the first end of the high-frequency arc ignition absorption circuit 140 is connected to the nozzle of the cutting gun head, the second end of the high-frequency arc ignition absorption circuit 140 is also connected to the high-frequency high-voltage transformer 160, the high-frequency high-voltage transformer is connected to the electrode of the cutting gun head, and the third end of the high-frequency arc ignition absorption circuit is also connected to the workpiece. During ignition, the no-load voltage is increased through the auxiliary circuit 120, so as to improve the non-arcing length and arc ignition capability of the plasma incineration power supply.

[0026] Preferably, the high-frequency rectification and arc striking unit 1 further includes a load inductor L3, which is connected to the main transformer and is used to protect the circuit when it is no-load.

[0027] Preferably, a current sensor H1 and an inductor L4 connected in series with the current sensor H1 are further included between the bypass circuit 150 and the high-frequency arc ignition absorption circuit 140 .

[0028] Preferably, the main power circuit 110 includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fourth resistor R4, a twelfth capacitor C12, a thirteenth capacitor C13, a fifth resistor R5, a sixth resistor R6, a fourteenth capacitor C14, a fifteenth capacitor C15, and a seventh resistor R7; the first diode D1 and the second diode D2 are connected in parallel in the same direction, and are connected in parallel with the fourth resistor R4 and the twelfth capacitor C12 connected in series, and are connected in parallel with the sixth resistor R6 and the fourteenth capacitor C14 connected in series; the third diode D3 and the fourth diode D4 are connected in parallel in the same direction, and are connected in parallel with the thirteenth capacitor C13 and the fifth resistor R5 connected in series, and are connected in parallel with the fifteenth capacitor C15 and the seventh resistor R7 connected in series; the fourteenth capacitor C14 is connected to the fifteenth capacitor C15, and the twelfth capacitor C12 is connected to the thirteenth capacitor C13.

[0029] Preferably, the secondary electrical circuit 120 includes a fifth diode D5, a sixth diode D6, a seventh diode D7, an eighth diode D8, an eighth resistor R8, a sixteenth capacitor C16, a ninth resistor R9, and a seventeenth capacitor C17; the fifth diode D5 and the sixth diode D6 are connected in parallel in the same direction, and then connected in parallel with the eighth resistor R8 and the sixteenth capacitor C16 connected in series; the seventh diode D7 and the eighth diode D8 are connected in parallel in the same direction, and then connected in parallel with the ninth resistor R9 and the seventeenth capacitor C17 connected in series; the anode of the sixth diode D6 is connected to the cathode of the eighth diode D8, and the anode of the fifth diode D5 is connected to the cathode of the seventh diode D7.

[0030] Preferably, the master-slave switching circuit 130 includes an insulated gate bipolar transistor V1 and a ninth diode D9, wherein the collector of the insulated gate bipolar transistor V1 is connected to the cathode of the ninth diode D9, and the emitter of the insulated gate bipolar transistor V1 is connected to the anode of the ninth diode D9.

[0031] Preferably, the bypass circuit 150 includes a tenth diode D10 and an eleventh diode D11, and the tenth diode D10 and the eleventh diode D11 are connected in parallel in the same direction.

[0032] Preferably, the high-frequency arc ignition absorption circuit 140 includes a high-frequency arc ignition absorption plate, a tenth resistor R10 and an eleventh resistor R11. The tenth resistor R10 and the eleventh resistor R11 are connected in series and connected to the high-frequency arc ignition absorption plate. The high-frequency arc ignition absorption circuit is used to absorb the high frequency and high voltage when the cutting torch starts arcing.

[0033] Preferably, the high-frequency arc absorbing plate is of model NSC-8.

[0034] Preferably, the diodes D1, D2, D3, D4, D5, D6, D7, D8, D10 and D11 are all fast recovery diodes.

[0035] The above embodiment effectively solves the problems of arc length and arc ignition energy of the non-transferred arc by utilizing a high no-load output solution composed of secondary windings connected in series.

[0036] The above is only an embodiment of the present utility model. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for technicians in this field, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the scope of protection of the utility model. These will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A high-load plasma incineration power supply, wherein the high-load plasma incineration power supply is connected to a cutting gun head, characterized in that: It includes a main transformer, the left side of the main transformer is connected to the inverter circuit, and the right side is connected to the high-frequency rectification and arc striking unit, and the high-frequency rectification and arc striking unit includes a main power circuit, a secondary power circuit, a main-secondary switching circuit, a high-frequency arc striking absorption circuit, a bypass circuit and a high-frequency high-voltage transformer; The first end of the main electric circuit is connected to the main transformer, the second end of the main electric circuit is connected to the first end of the main-auxiliary switching circuit, the first end of the auxiliary electric circuit is connected to the main transformer, the second end of the auxiliary electric circuit is connected to the second end of the main-auxiliary switching circuit, the first end of the main-auxiliary switching circuit is connected to the first end of the bypass circuit, the second end of the main-auxiliary switching circuit is connected to the second end of the bypass circuit, the first end of the bypass circuit is connected to the third end of the high-frequency arc ignition absorption circuit, the second end of the bypass circuit is connected to the second end of the high-frequency arc ignition absorption circuit, the first end of the high-frequency arc ignition absorption circuit is connected to the nozzle of the cutting gun head, the second end of the high-frequency arc ignition absorption circuit is also connected to the high-frequency high-voltage transformer, the high-frequency high-voltage transformer is connected to the electrode of the cutting gun head, and the third end of the high-frequency arc ignition absorption circuit is also connected to the workpiece. During ignition, the no-load voltage is increased through the auxiliary electric circuit, so as to improve the non-arcing length and arc ignition capability of the plasma incineration power supply.

2. The high no-load plasma incineration power supply according to claim 1, characterized in that: The high-frequency rectification and arc striking unit further includes a load inductor L3, which is connected to the main transformer and is used to protect the circuit when it is no-load.

3. The high no-load plasma incineration power supply according to claim 1, characterized in that: A current sensor H1 and an inductor L4 connected in series with the current sensor H1 are further included between the bypass circuit and the high-frequency arc ignition absorption circuit.

4. The high no-load plasma incineration power supply according to claim 1, characterized in that: The main power circuit includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fourth resistor R4, a twelfth capacitor C12, a thirteenth capacitor C13, a fifth resistor R5, a sixth resistor R6, a fourteenth capacitor C14, a fifteenth capacitor C15, and a seventh resistor R7; The first diode D1 and the second diode D2 are connected in parallel in the same direction, and are connected in parallel with the fourth resistor R4 and the twelfth capacitor C12 connected in series, and are connected in parallel with the sixth resistor R6 and the fourteenth capacitor C14 connected in series. The third diode D3 and the fourth diode D4 are connected in parallel in the same direction, and are connected in parallel with the thirteenth capacitor C13 and the fifth resistor R5 connected in series, and are connected in parallel with the fifteenth capacitor C15 and the seventh resistor R7 connected in series. The fourteenth capacitor C14 is connected to the fifteenth capacitor C15, and the twelfth capacitor C12 is connected to the thirteenth capacitor C13.

5. The high no-load plasma incineration power supply according to claim 1, characterized in that: The auxiliary circuit includes a fifth diode D5, a sixth diode D6, a seventh diode D7, an eighth diode D8, an eighth resistor R8, a sixteenth capacitor C16, a ninth resistor R9, and a seventeenth capacitor C17; The fifth diode D5 and the sixth diode D6 are connected in parallel in the same direction, and then connected in parallel with the eighth resistor R8 and the sixteenth capacitor C16 connected in series. The seventh diode D7 and the eighth diode D8 are connected in parallel in the same direction, and then connected in parallel with the ninth resistor R9 and the seventeenth capacitor C17 connected in series. The anode of the sixth diode D6 is connected to the cathode of the eighth diode D8, and the anode of the fifth diode D5 is connected to the cathode of the seventh diode D7.

6. The high no-load plasma incineration power supply according to claim 1, characterized in that: The master-slave switching circuit includes an insulated gate bipolar transistor V1 and a ninth diode D9. The collector of the insulated gate bipolar transistor V1 is connected to the cathode of the ninth diode D9, and the emitter of the insulated gate bipolar transistor V1 is connected to the anode of the ninth diode D9.

7. The high no-load plasma incineration power supply according to claim 1, characterized in that: The bypass circuit includes a tenth diode D10 and an eleventh diode D11 , and the tenth diode D10 and the eleventh diode D11 are connected in parallel in the same direction.

8. The high no-load plasma incineration power supply according to claim 1, characterized in that: The high-frequency arc ignition absorption circuit includes a high-frequency arc ignition absorption board, a tenth resistor R10 and an eleventh resistor R11. The tenth resistor R10 and the eleventh resistor R11 are connected in series and connected to the high-frequency arc ignition absorption board. The high-frequency arc ignition absorption circuit is used to absorb the high frequency and high voltage when the cutting torch starts arcing.

9. The high no-load plasma incineration power supply according to claim 8, characterized in that: The high-frequency arc absorbing plate is of model NSC-8.

10. The high no-load plasma incineration power supply according to any one of claims 4, 5 and 7, characterized in that: The diodes D1 , D2 , D3 , D4 , D5 , D6 , D7 , D8 , D10 and D11 are all fast recovery diodes.

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