A method of obtaining a high-voltage discharge between the liquid electrolyte and the cathode and a solid anode, partially immersed in the electrolyte


 

The invention relates to methods of producing, research and application of low-temperature plasma and can be used in the plasma chemistry, plasma processing technologies of materials and plasma technology, in particular in plasma-chemical reactor. The technical result is to increase the burning time of the discharge and the expansion of the ranges of current and discharge power upwards. In the method of obtaining a high-voltage discharge between the liquid electrolyte and the cathode and a solid anode, consisting in the ignition of an electrical discharge between the liquid electrolyte and solid electrode located above the electrolyte so that its lower surface is below the level of the electrolyte, pre-arranged within the upper layers of the electrolyte along the surface and the discharge is ignited in the gap between the surface of the electrolyte and solid electrode, and then sets the combustion mode with a current density of liquid electrolyte to the cathode of not lower than 0.5 a/cm2and raise the electrolyte level above the level of the bottom surface of the solid electrode, while the solid-state electrode is cooled by pumping through him coolant. 2 Il.

Known methods for producing an electric discharge between the liquid electrolyte and the cathode and a solid anode, partially or completely immersed in the electrolyte [Slowacki D. I., Terentyev, S. D., Plekhanov Century, the Mechanism of plasma-electrolytic heating of metals//TVT. 1986. So 24. No. 2. S. 353-363; Gaisin F. M., Son of E. C., Shakirov Y. I. Metabolic discharge in a vapor-gas medium between the solid and liquid electrodes. M.: Publishing house of USPI, 1990, pages 58-59]. However, these discharges are burning at a relatively low voltage (less than 500).

Known methods for producing high-voltage (>500 V) of the electric discharge between the liquid electrolyte and the cathode and a solid anode, partially immersed in the electrolyte [Gaisin F. M., Son of E. C., Shakirov Y. I. Volumetric discharge in perogatives environment between the solid and liquid electrodes. M.: Publishing house of USPI, 1990, page 57; Kuzmin S. M. Physico-chemical aspects of interaction of non-equilibrium plasma with aqueous solutions of electrolytes / abstract. Diss. for obtaining the academic degree K. H. N. Ivanovo, 1997]. Near-cathode processes of high-voltage discharges are significantly different from the near-electrode processes, low-voltage discharges. On the positive electrodes and is therefore often referred to as Claudine discharges in atmospheric pressure. For such discharges must be used slabokontsentrirovannye aqueous solutions of salts, alkalis and acids.

As a prototype selected a method of obtaining high-voltage discharge in atmospheric pressure, which consists in the ignition discharge electrolyte between the cathode and the solid-state anode located above the electrolyte so that its lower surface is below the level of the electrolyte [Kuzmin S. M. Physico-chemical aspects of interaction of non-equilibrium plasma with aqueous solutions of electrolytes / abstract. Diss. for obtaining the academic degree K. H. N. Ivanovo, 1997].

The prototype has the following disadvantages: 1) the combustion duration of the discharge is limited because the temperature of the solution gradually increases and may reach the boiling point; 2) the discharge is lit only with small areas of contact with the electrodes due to the removal of heat from the electrode spots, mainly due to the heat; 3) the discharge is thin and burns at low currents (same reason as specified in paragraph (2).

The task of the invention is to increase the burning time of the discharge and the expansion of the ranges of current and discharge power upward.

This technical result is achieved is by the node, consisting in the ignition of an electrical discharge between the liquid electrolyte and solid electrode located above the electrolyte so that its lower surface is below the level of the electrolyte, pre-arranged within the upper layers of the electrolyte along the surface and the discharge is ignited in the gap between the surface of the electrolyte and solid electrode, and then sets the combustion mode with a current density of liquid electrolyte to the cathode of not lower than 0.5 a/cm2and raise the electrolyte level above the level of the bottom surface of the solid electrode, while the solid-state electrode is cooled by pumping through him coolant.

In Fig.1 shows a diagram of the device for high-voltage discharge between the liquid electrolyte and the cathode and a solid anode, partially immersed in the electrolyte.

In Fig.2 shows a fragment of the device shown in Fig.1.

The method is implemented in the device, which is shown in Fig.1. The device consists of a vessel 1, which is supplied by current supply 2 and has a hole 3 in the upper part of the side wall of the vessel 1. In the vessel 1 filled with the electrolyte 4 so that the electrolyte level above the openings 3. Through hole 3 Sook 5, which is mounted at the wall opposite the hole 3. Above the receptacle 1 posted by solid-state water-cooled electrode 6. The electrolyte 4 is a liquid electrolyte cathode, and the electrode 6 to the anode.

The method is as follows. The flow of electrolyte and pumping it out of the vessel 1 are set so that between the surface of the electrolyte 4 and the electrode 6 form a gap l in the range of 3-5 mm, the Electrolyte flows inside the vessel from the inlet 5 to the outlet 3. Because the hole 3 is located closer to the surface of the electrolyte 4, occurs within the upper layers of the electrolyte 4 along its surface. Further, known methods ignites the discharge between the electrolyte 4 and the electrode 6. After that, the discharge is displayed in the mode with a current density of liquid cathode ~0.5 a/cm2and more. Then in any way increase the level of the electrolyte 5 in the vessel 1 so that the lower surface of the electrode 6 was below the level of the electrolyte 4. When this discharge is burning in the recess 7 within the electrolyte 4, as shown in Fig.2. The electrolyte layer 4 may be changed or a temporary reduction in the rate of pumping, or a temporary increase in the rate of feed of the electrolyte, or by adding an electrolyte in the vessel 1 to the IOM mode, adjust feed rate and pumping of the electrolyte so that the electrolyte level remained unchanged in the future.

The flow of electrolyte along the surface contributes to the fact that the electrolyte under the action of electric discharge is not heated to high temperatures that occur nucleate boiling. Nucleate boiling is undesirable due to the fact that with the high boiling the electrolyte is sprayed, gets in the discharge region and thereby disrupt the stability of combustion discharge. On the surface of the current electrolyte film boiling occurs without splashing of the electrolyte. This is one of the distinguishing features of the proposed method.

Reactive power vapor deforms the surface of the electrolyte 4 in. It is the action of reactive power allows vapor to raise the electrolyte level 4 above the bottom surface of the electrode 6. To the reactive force of vapour was sufficient to maintain clearance(see Fig.2), the current density on the liquid cathode should be at least 0.5 a/cm2. At lower values of current density on the liquid cathode is the contact of the electrolyte with 4 electrode 6, starts nucleate boiling El is m2. The border from large values of current density is determined by the regime of combustion of high-voltage discharge. For large values of current density discharge enters pulse-spark mode. Reactive power vapor becomes a pulse. Consequently, on the surface of the electrolyte appears ripples, and the electrolyte 4 comes into contact with the electrode. Ultimately, the discharge becomes unstable.

The current density on the solid-state anode is substantially higher than the liquid cathode. Therefore, the solid-state electrode 6 is heated to high temperatures. The higher the current, the higher the temperature of the electrode 6. Therefore, in order to protect the solid-state electrode 6 from thermal destruction, provided by the cooling of the electrode. It is cooled by pumping through him coolant. Such cooling of the electrode 6 has allowed to increase the discharge current up to 10 A. the capacity of the discharge were up to 10 kW. In the experiments the electrolyte used was an aqueous salt solution with a mass concentration of 0.05%. Solid-state electrode was made of steel.

Thus, the proposed method can significantly increase the current and power high-voltage discharge between the liquid electr who m the time of discharge can be arbitrarily large, because the resources of the two electrodes and liquid electrolyte cathode, and a solid anode, is practically unlimited.

Claims

A method of obtaining a high-voltage discharge between the liquid electrolyte and the cathode and a solid anode, consisting in the ignition of an electrical discharge between the liquid electrolyte and solid electrode located above the electrolyte so that its lower surface is below the level of the electrolyte, wherein the pre-arranged within the upper layers of the electrolyte along the surface and the discharge is ignited in the gap between the surface of the electrolyte and solid electrode, and then sets the combustion mode with a current density of liquid electrolyte to the cathode of not lower than 0.5 a/cm2and raise the electrolyte level above the level of the bottom surface of the solid electrode, while the solid-state electrode is cooled by pumping through him coolant.



 

Same patents:

The invention relates to gas-discharge technique and can be used in gas-discharge devices for spectroscopic analysis of gases and their mixtures, for example to determine the composition of the exhaled gas mixtures in medical diagnosis, as well as a compact light source

The invention relates to gas-discharge technique and can be used in gas-discharge devices for spectroscopic analysis of gases and their mixtures, for example to determine the composition of the exhaled gas mixtures in medical diagnosis, as well as a compact light source

Plasma accelerator // 2241139
The invention relates to a plasma accelerator device

Method heat // 2240612

Plasma accelerator // 2239962
The invention relates to a plasma accelerator

The invention relates to the field of thermal and thermochemical treatment of metals, specifically to equipment for plasma arc processes: cutting, welding, plasma-arc spraying, welding, thermal and thermo-chemical surface treatment and so on, and can be used in the construction of the cathode of the plasma torch

The invention relates to methods of producing, research and application of low-temperature plasma and can be used in the plasma chemistry, plasma processing technologies of materials and plasma technology, in particular in plasma-chemical reactor

The invention relates to methods of producing, research and application of low-temperature plasma and can be used in the plasma chemistry, plasma processing technologies of materials and plasma technology, in particular in plasma-chemical reactor

The invention relates to methods of producing, research and application of low-temperature plasma and can be used in the plasma chemistry, plasma processing technologies of materials and plasma technology, in particular in plasma-chemical reactor

Discharge luggage // 2236093
The invention relates to gas-discharge technique and can be used to produce glow discharge (TR) for a variety of purposes, for example for the excitation of the active medium of gas lasers for spectroscopy of gases and their mixtures for chemical analysis, to create a plasma-chemical reactors and plasma etching chips, etc

The invention relates to gas-discharge technique and can be used in gas-discharge devices for spectroscopic analysis of gases and their mixtures, for example to determine the composition of the exhaled gas mixtures in medical diagnosis, as well as a compact light source

The invention relates to gas-discharge technique and can be used in gas-discharge devices for spectroscopic analysis of gases and their mixtures, for example to determine the composition of the exhaled gas mixtures in medical diagnosis, as well as a compact light source

Plasma accelerator // 2241139
The invention relates to a plasma accelerator device

Method heat // 2240612

Plasma accelerator // 2239962
The invention relates to a plasma accelerator

The invention relates to the field of thermal and thermochemical treatment of metals, specifically to equipment for plasma arc processes: cutting, welding, plasma-arc spraying, welding, thermal and thermo-chemical surface treatment and so on, and can be used in the construction of the cathode of the plasma torch

The invention relates to methods of producing, research and application of low-temperature plasma and can be used in the plasma chemistry, plasma processing technologies of materials and plasma technology, in particular in plasma-chemical reactor

The invention relates to methods of producing, research and application of low-temperature plasma and can be used in the plasma chemistry, plasma processing technologies of materials and plasma technology, in particular in plasma-chemical reactor

The invention relates to methods of producing, research and application of low-temperature plasma and can be used in the plasma chemistry, plasma processing technologies of materials and plasma technology, in particular in plasma-chemical reactor

Discharge luggage // 2236093
The invention relates to gas-discharge technique and can be used to produce glow discharge (TR) for a variety of purposes, for example for the excitation of the active medium of gas lasers for spectroscopy of gases and their mixtures for chemical analysis, to create a plasma-chemical reactors and plasma etching chips, etc

The invention relates to gas-discharge technique and can be used in gas-discharge devices for spectroscopic analysis of gases and their mixtures, for example to determine the composition of the exhaled gas mixtures in medical diagnosis, as well as a compact light source
Up!