CN214675823U - Microwave-induced metal discharge combustion-supporting device - Google Patents

Abstract

The utility model provides a microwave induction metal discharge combustion-supporting device, include: the microwave plasma generator comprises a metal cavity, a microwave source and a plasma generating region, wherein the microwave source is arranged on the outer side surface of the metal cavity, the plasma generating region is arranged in the metal cavity and opposite to the microwave source, and the plasma generating region comprises a metal electrode pair consisting of a metal cathode and a metal anode. That is to say, the utility model discloses a mode of giving the bias of metal cathode one is not enough to produce the voltage of the requirement of discharging realizes only needing very weak microwave induction metal electrode pair can take place the purpose of discharging, further also can discharge the plasma absorption microwave heat that produces at the metal electrode pair and expand to the certain degree after, realize igniting the purpose through the mode of exerting voltage to the metal cathode and ignite, realized utilizing the plasma that microwave induction metal electrode produced to carry out the purpose of high efficiency and quick ignition, moreover, the steam generator is simple in structure, low in power consumption, high reliability, can extensively be used for energy-concerving and environment-protective field.

Description

Microwave-induced metal discharge combustion-supporting device

Technical Field

The utility model belongs to the technical field of the combustion-supporting processing of microwave, a but not limited to microwave induction metal combustion-supporting device that discharges is related to.

Background

It is known that microwave is an electric wave with a frequency of 300 mhz to 300 ghz, and its polarity orientation changes with the change of external electric field under the action of fast changing high frequency point magnetic field, so as to cause the effect of mutual friction movement of molecules, at this time, the field energy of microwave field is converted into heat energy in medium, so that the material temperature is raised, and several series of physical and chemical processes of thermalization, puffing and the like are produced, so as to attain the goal of microwave heating. Therefore, how to realize microwave combustion supporting efficiently and quickly becomes a current popular research direction.

The existing microwave-assisted spark plug ignition integrated device comprises a spark plug system, a microwave system and a mixer, wherein the spark plug system and the microwave system are integrated through the mixer, the spark plug system comprises a discharge needle end and a grounding electrode, pulse high voltage acts on the discharge needle end, a strong electric field is formed between the discharge needle end and the grounding electrode, and diluted mixed gas is punctured to form an initial plasma group; the microwave system comprises a magnetron and a magnetron driving coil, wherein the magnetron driving coil is used for generating a pulse high voltage signal required for driving the magnetron, and the pulse high voltage signal drives the magnetron to generate microwave pulses with specific frequency.

However, the existing microwave-assisted spark plug ignition integrated device cannot achieve a large-area array due to the adoption of a spark plug for ignition, and the control between plasma and microwave is very complicated, so that the microwave combustion-supporting efficiency is not high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a microwave induction metal combustion-supporting device that discharges to prior art is not enough realizing the combustion-supporting in-process of microwave existence, to solve current microwave auxiliary spark plug ignition integrated device and because adopt the spark plug to ignite, can't reach the large tracts of land array, and control between plasma and the microwave very complicated and the combustion-supporting efficiency of microwave that leads to not high problem.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

the embodiment of the utility model provides a microwave induction metal combustion-supporting device that discharges, the device includes: the microwave plasma generating device comprises a metal cavity, a microwave source and a plasma generating area;

the microwave source is arranged on the outer side surface of the metal cavity, the plasma generation area is arranged in the metal cavity and opposite to the microwave source, and the plasma generation area comprises a metal electrode pair consisting of a metal cathode and a metal anode.

Optionally, the metal cathode and the metal anode are made of a high-temperature-resistant metal material with tips, and the tips on the metal cathode are distributed opposite to the tips on the metal anode.

Optionally, the number of the metal electrode pairs is multiple, and each metal electrode pair is externally connected with a high-voltage power supply respectively.

Optionally, the device further comprises a ceramic insulation pair, and the ceramic insulation pair is used for fixing two ends of the metal electrode pair.

Optionally, when the ceramic insulation pair includes a ceramic insulation terminal, the ceramic insulation terminal is used for fixing one end of the metal electrode pair.

Optionally, when the ceramic insulation pair includes a porous ceramic plate, the porous ceramic plate is used to fix the other end of the metal electrode pair.

Optionally, the metal cathode is used for biasing a negative high voltage, and the metal anode is used for biasing a positive low voltage.

Optionally, the number of the microwave sources is multiple, and the multiple microwave source arrays are distributed on the outer side surface of the metal cavity.

Optionally, the microwave source is composed of a magnetron, a waveguide, a radiator, a power supply and a cooler.

Optionally, the metal cathode and the metal anode are respectively a high-temperature resistant metal rod with a tip or a high-temperature resistant metal wire with a tip.

The utility model has the advantages that: a microwave-induced metal discharge combustion-supporting device comprises: the microwave plasma generating device comprises a metal cavity, a microwave source and a plasma generating area; the microwave source is arranged on the outer side surface of the metal cavity, the plasma generation area is arranged in the metal cavity and opposite to the microwave source, and the plasma generation area comprises a metal electrode pair consisting of a metal cathode and a metal anode. That is, the utility model realizes the purpose of discharging only by weak microwave induced metal electrode pair by biasing the metal cathode in a way of not enough voltage to generate the discharging requirement, further realizes the ignition by applying voltage to the metal cathode after the plasma generated by the discharging of the metal electrode pair absorbs the microwave heat and expands to a certain degree, realizes the purpose of high-efficiency and fast ignition by using the plasma generated by the microwave induced metal electrode, has simple structure, can realize the generation and growth conditions of array type large-area plasma, has small power consumption and high reliability, can be widely used in the fields of waste gas treatment and microwave combustion supporting, greatly improves the microwave combustion-supporting efficiency, solves the problem that the existing microwave assisted spark plug ignition integrated device can not reach a large-area array due to the ignition of the spark plug, and the problem that the microwave combustion-supporting efficiency is not high due to the very complicated control between the plasma and the microwave is solved, the method has the advantages of safety, reliability, easy operation, low cost and continuous operation, and is widely applied to the field of energy conservation and environmental protection, so that the service life of the microwave-induced metal discharge combustion-supporting device is greatly prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of a microwave-induced metal discharge combustion-supporting apparatus according to an embodiment of the present invention.

Icon: 1-metal cavity, 2-microwave source, 3-plasma generating region, 31-metal cathode, 32-metal anode, 33-high voltage power supply, 34-ceramic insulating terminal and 35-porous ceramic plate.

Detailed Description

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. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Here, the related terms in the present invention are explained:

plasma, a fourth state of matter different from solid, liquid and gas. A substance is composed of molecules, which are composed of atoms, which are composed of a positively charged nucleus and negatively charged electrons surrounding it. When heated to a sufficiently high temperature or for other reasons, the outer electrons become free electrons free of the nuclei, leaving the nuclei, a process known as "ionization". At this time, the substance becomes a uniform mass of "paste" consisting of positively charged nuclei and negatively charged electrons, so it is called ion paste by chance, and the total amount of positive and negative charges in these ion pastes is equal, so it is nearly electrically neutral, so it is called plasma; the gas is ionized gas-like substance consisting of positive and negative ions generated after atoms and atomic groups are ionized after partial electrons are deprived, and the movement of the macroscopic electroneutral ionized gas with the dimension larger than the Debye length is mainly governed by electromagnetic force and shows remarkable collective behavior. It is widely present in the universe and is often considered to be the fourth state in which substances exist in addition to solids, liquids and gases.

Fig. 1 is a schematic view of a microwave-induced metal discharge combustion-supporting apparatus according to an embodiment of the present invention. The following describes in detail the microwave-induced metal discharge combustion-supporting device provided in the embodiment of the present invention with reference to fig. 1.

Fig. 1 is a schematic view of a microwave-induced metal discharge combustion-supporting device provided by an embodiment of the present invention, as shown in fig. 1, this microwave-induced metal discharge combustion-supporting device includes: a metal cavity 1, a microwave source 2 and a plasma generation region 3.

Wherein, the microwave source 2 may be disposed on the outer side of the metal cavity 1, the plasma generation region 3 may be disposed inside the metal cavity 1 and may be opposite to the microwave source 2, and the plasma generation region 3 may include a metal electrode pair composed of a metal cathode 31 and a metal anode 32.

Alternatively, the plasma generation region 3 may be a high voltage electrode array formed of a plurality of metal electrode pairs.

It should be noted that the device may be similar in configuration to a MW-LEP apparatus.

In the embodiment of the present invention, the metal cathode 31 and the metal anode 32 can be respectively made of metal material with tip and high temperature resistance, and the tip on the metal cathode 31 and the tip on the metal anode 32 can be distributed relatively.

Alternatively, the metal cathode 31 and the metal anode 32 may be a tipped refractory metal rod or a tipped refractory metal wire, respectively.

Alternatively, one metal cathode 31 and one metal anode 32 may form a metal electrode pair, and the arrangement of the metal electrode pair may be similar to the arrangement of the electrodeless ultraviolet lamp in the MW-LEP apparatus.

The embodiment of the utility model provides an in, the quantity of metal electrode pair can be a plurality of, and every metal electrode pair can external high voltage power supply 33 respectively.

Alternatively, the high voltage power supply 33 may be a negative high voltage power supply, and the high voltage power supply 33 may include a positive electrode and a negative electrode, the negative electrode may be used to output a negative high voltage, and the positive electrode may be used to output a positive low voltage.

In the embodiment of the utility model provides an in, the device can also include ceramic insulation right, ceramic insulation is to the both ends that can be used for fixed metal electrode pair.

Alternatively, the metallic cathode 31 and the metallic anode 32 in the plasma generation region 3 may be electrically isolated using a ceramic insulation pair when they are present in pairs.

Alternatively, where the ceramic insulation pair includes a ceramic insulation terminal 34, the ceramic insulation terminal may be used to secure one end of the metal electrode pair.

Alternatively, when the ceramic insulation pair includes the porous ceramic plate 35, the porous ceramic plate 35 may be used to fix the other end of the metal electrode pair.

Note that the fixing manner of fixing the other end of the metal electrode pair using the porous ceramic plate 35 may be similar to that of the teflon plate in the MW-LEP apparatus.

For example, the installation of the metal electrode pair, the microwave source 2 and the ceramic insulation pair may include: (1) two ends of the metal electrode pair can be respectively fixed by a ceramic insulation pair; (2) one end of the metal electrode pair is mounted on the side wall of the metal chamber 1, and the other end of the metal electrode pair can be fixed by a porous ceramic plate 35 (similar to the teflon plate in the MW-LEP device); (3) the microwave sources 2 are installed on opposite sides of the plasma generation region 3 for radiating microwaves to the space inside the metal chamber 1.

In the embodiment of the present invention, the metal cathode 31 can be used for bias negative high voltage, and the metal anode 32 can be used for bias positive low voltage.

The purpose of using the metal cathode 31 to bias the negative high voltage and the metal anode 32 to bias the positive low voltage is to reduce the recombination rate of the plasma and to extend the lifetime of the plasma.

Alternatively, the number of the microwave sources 2 may be plural, and a plurality of the microwave sources 2 may be distributed on the outer side surface of the metal cavity 1 in an array.

It should be noted that, as shown in fig. 1, a plurality of microwave sources 2 may be disposed on opposite sides of a plurality of metal electrode pairs in the metal chamber 1. When the microwave source 2 stops radiating microwaves into the metal chamber 1, the metal electrode pair in the plasma generation region 3 may not discharge.

Alternatively, the microwave source 2 may be composed of a magnetron, a waveguide, a radiator, a power supply, and a cooler.

The utility model provides a microwave induction metal combustion-supporting device that discharges's theory of operation: (1) the metal cathode 31 is biased with a certain negative high voltage, which is not enough to generate discharge, and the negative high voltage can be used to realize that the electric field of the tips distributed on the metal electrode pair can meet the discharge requirement under weak microwave induction, thereby generating the discharge. (2) After the metal electrode discharges and generates plasma, the discharge is stopped, and the plasma absorbs microwave energy and is greatly expanded, so that the defect that the conventional plasma is ignited and disappears due to continuous discharge is avoided; (3) after the plasma is expanded to a certain extent, the plasma is ignited by a separate metal cathode to perform a chemical reaction. Based on this, in the actual treatment process, the heat generated in the discharge process can realize the ignition per se, and no additional ignition process is needed. And, additional ignition is required only at low microwave power, and the heat release itself can achieve preheating of the gas. In addition, heat can eliminate ozone, thereby makes the utility model provides a microwave induction metal discharge combustion-supporting device can extensively be used for exhaust-gas treatment and the combustion-supporting field of microwave.

The embodiment of the utility model provides an in, the device can also include the controller, the controller can control microwave source 2 to radiation microwave in the metal cavity 1 when metal cathode's 31 burden high pressure reaches the discharge voltage requirement, the controller also can detect high tension current when metal cathode's 31 burden high pressure does not reach the discharge voltage threshold value in order to carry out feedback control, reach the discharge voltage requirement until metal cathode's 31 burden high pressure, the controller also can control and carry out to apply the pulse high pressure to metal cathode 31 in order to ignite, the pulse high pressure of applying can be higher than the discharge voltage threshold value, duration can be 1us-1ms, the discharge voltage threshold value can not discharge, can ignite when superpose the pulse high pressure on the discharge voltage threshold value, wherein highly compressed pulse cycle of pulse and pulse width are all adjustable.

The embodiment of the utility model provides an in disclose, a microwave induction metal combustion-supporting device that discharges, include: the microwave plasma generating device comprises a metal cavity, a microwave source and a plasma generating area; the microwave source is arranged on the outer side surface of the metal cavity, the plasma generation area is arranged in the metal cavity and opposite to the microwave source, and the plasma generation area comprises a metal electrode pair consisting of a metal cathode and a metal anode. That is, the utility model realizes the purpose of discharging only by weak microwave induced metal electrode pair by biasing the metal cathode in a way of not enough voltage to generate the discharging requirement, further realizes the ignition by applying voltage to the metal cathode after the plasma generated by the discharging of the metal electrode pair absorbs the microwave heat and expands to a certain degree, realizes the purpose of high-efficiency and fast ignition by using the plasma generated by the microwave induced metal electrode, has simple structure, can realize the generation and growth conditions of array type large-area plasma, has small power consumption and high reliability, can be widely used in the fields of waste gas treatment and microwave combustion supporting, greatly improves the microwave combustion-supporting efficiency, solves the problem that the existing microwave assisted spark plug ignition integrated device can not reach a large-area array due to the ignition of the spark plug, and the problem that the microwave combustion-supporting efficiency is not high due to the very complicated control between the plasma and the microwave is solved, the method has the advantages of safety, reliability, easy operation, low cost and continuous operation, and is widely applied to the field of energy conservation and environmental protection, so that the service life of the microwave-induced metal discharge combustion-supporting device is greatly prolonged.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A microwave-induced metal discharge combustion-supporting device is characterized by comprising: the microwave plasma generating device comprises a metal cavity (1), a microwave source (2) and a plasma generating region (3);

the microwave source (2) is arranged on the outer side face of the metal cavity (1), the plasma generation region (3) is arranged inside the metal cavity (1) and opposite to the microwave source (2), and the plasma generation region (3) comprises a metal electrode pair consisting of a metal cathode (31) and a metal anode (32).

2. The microwave-induced metal discharge combustion-supporting device according to claim 1, wherein the metal cathode (31) and the metal anode (32) are made of metal materials with tips and high temperature resistance, and the tips on the metal cathode (31) are distributed opposite to the tips on the metal anode (32).

3. The microwave-induced metal discharge combustion-supporting device according to claim 1, wherein the number of the metal electrode pairs is multiple, and each metal electrode pair is externally connected with a high-voltage power supply (33) respectively.

4. The microwave-induced metal discharge combustion-supporting device according to claim 1, further comprising a ceramic insulation pair for fixing both ends of the metal electrode pair.

5. Microwave-induced metal discharge combustion-supporting device according to claim 4, characterized in that when said ceramic insulating pair comprises a ceramic insulating terminal (34), said ceramic insulating terminal is used to fix one end of said metal electrode pair.

6. Microwave-induced metal discharge comburent device according to claim 4, characterized in that when said ceramic insulating pair comprises a porous ceramic plate (35), said porous ceramic plate is used to fix the other end of said pair of metal electrodes.

7. Microwave-induced metal discharge combustion-supporting device according to claim 1, characterized in that said metal cathode (31) is used to bias negative high voltage and said metal anode (32) is used to bias positive low voltage.

8. The microwave-induced metal discharge combustion-supporting device according to claim 1, wherein the number of the microwave sources (2) is multiple, and a plurality of microwave sources (2) are distributed on the outer side surface of the metal cavity (1).

9. Microwave-induced metal discharge comburent device according to claim 1, characterized in that said microwave source (2) is composed of a magnetron, a waveguide, a radiator, a power supply and a cooler.

10. Microwave-induced metal discharge combustion-supporting device according to claim 2, characterized in that said metal cathode (31) and said metal anode (32) are respectively a pointed refractory metal rod or a pointed refractory metal wire.

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