A reaction termination device for cooling a plasma reactor using a nozzle

Abstract

The application discloses a reaction termination device for cooling a plasma reactor by using a nozzle, relates to the technical field of plasma reactors, and mainly comprises quartz glass medium, a high-voltage electrode tube, a grounding electrode and a nozzle. The quartz glass medium is arranged around the high-voltage electrode tube, one end of the grounding electrode extends to the outside of the quartz glass medium, and the other end of the grounding electrode is grounded. One end of the quartz glass medium is provided with an air inlet part, one end of the air inlet part is provided with an air inlet, and the other end of the air inlet part is in communication with the quartz glass medium. One end of the nozzle is in communication with the other end of the quartz glass medium, and the other end of the nozzle is provided with an air outlet. The reaction termination device for cooling the plasma reactor by using the nozzle can cool the reactor through a reaction outlet nozzle and liquid nitrogen water cooling, can terminate the experiment, and is also used for saving energy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plasma reactors, in particular to a reaction termination device for cooling a plasma reactor by using a nozzle. BACKGROUND

[0002] At present, plasma reactors play a very important role in waste gas treatment and energy saving methods. Waste gas components are usually divided into several categories such as non-methane hydrocarbons, oxygen-containing organic compounds, halogenated hydrocarbons, nitrogen-containing organic compounds, and sulfur-containing organic compounds. VOCs (volatile organic compounds) are also important precursors of urban haze and photochemical smog, mainly from coal chemical industry, petroleum chemical industry, fuel paint manufacturing, solvent manufacturing and use, etc.

[0003] At the current technical stage, plasma has a catalytic effect on VOCs, and the lower the temperature, the more obvious the activation effect. Plasma surface treatment can change the valence state of metal active components and achieve catalyst reduction. The reduction of catalyst surface metal is directly related to the high-energy electrons in the plasma. When the catalyst is placed in the plasma, the moving speed of the electrons is much higher than that of other heavy ions, so the electrons first reach the catalyst surface and form a stable plasma sheath layer on the catalyst surface.

[0004] The patent document with publication number CN217591176U discloses a temperature-reducing dielectric barrier discharge reactor. It is disclosed that high-energy electrons in low-temperature plasma bombard substance molecules, which can open molecular bonds, ionize, dissociate and excite substances, trigger a series of physical and chemical reactions, and even reactions that cannot be performed by conventional thermodynamics can occur. Low-temperature plasma has been widely concerned and researched in gas pollution control. However, during the generation of low-temperature plasma, part of the electrical energy is converted into heat energy, causing the temperature of the reactor to rise, affecting the activity of the catalyst, and during the process of low-temperature plasma cooperating with the catalyst to treat the target gas, other by-products are also generated, which need to be further treated. It includes a reaction tube, a cooling tube, a purification tube, a high-voltage electrode, and a grounding electrode. The upper part of the reaction tube is connected to the upper part of the purification tube through a communication pipe. The high-voltage electrode is arranged in the reaction tube through a sealing plug. The bottom of the reaction tube is provided with a gas inlet. The grounding electrode is sleeved outside the reaction tube and corresponds to the high-voltage electrode. The cooling tube is sleeved outside the grounding electrode. The cooling tube is provided with a cooling medium inlet and a cooling medium outlet. The bottom of the purification tube is provided with a gas outlet, and the top of the purification tube is sealed. The high-voltage electrode and the grounding electrode are connected with a power supply. The device solves the problem of the rise of the reactor temperature during the generation of low-temperature plasma, which affects the activity of the catalyst, and can continuously purify the gas. The device has a simple structure and is suitable for industrial production and market promotion and application.

[0005] The above temperature-reducing dielectric barrier discharge reactor has poor cooling effect, and energy consumption is high during experiments. SUMMARY

[0006] To solve the above technical problems, the application provides a reaction termination device for cooling a plasma reactor by using a nozzle, which can cool the reactor by a reaction outlet nozzle and liquid nitrogen water cooling, can terminate experiments, and can save energy.

[0007] To achieve the above object, the application provides the following scheme.

[0008] The application provides a reaction termination device for cooling a plasma reactor by using a nozzle, which comprises quartz glass media, a high-voltage electrode tube, a grounding electrode, and a nozzle; the quartz glass media is arranged around the high-voltage electrode tube, one end of the grounding electrode extends to the outside of the quartz glass media, and the other end of the grounding electrode is grounded; one end of the quartz glass media is provided with an air inlet piece, one end of the air inlet piece is provided with an air inlet, and the other end of the air inlet piece is in communication with the quartz glass media; one end of the nozzle is in communication with the other end of the quartz glass media, and the other end of the nozzle is provided with an air outlet.

[0009] Optionally, the quartz glass media is provided with a spiral blade, which is used to accelerate the gas in the quartz glass media.

[0010] Optionally, the spiral blade is made of polyethylene material.

[0011] Optionally, the nozzle is cooled by liquid nitrogen.

[0012] Optionally, the inside of the nozzle is provided with a horn-shaped channel, and the outside of the nozzle is used to be connected with the shell of the plasma reactor.

[0013] Optionally, the air inlet piece is made of 304 or 316 stainless steel material; and the pipe diameter of the air inlet is 30 mm.

[0014] Optionally, the high-voltage electrode tube is made of 304 or 316 stainless steel material.

[0015] Optionally, the inner diameter of the quartz glass media is 5 mm, and the wall thickness is 2-3 mm.

[0016] Optionally, the frequency of the power source connected with the high-voltage electrode tube is 7-12 kHz, and the maximum voltage can reach 30 kV.

[0017] Optionally, the nozzle is made of polypropylene with glass fiber and 316 stainless steel.

[0018] The application has the following technical effects compared with the prior art:

[0019] The reaction termination device of the present invention, which uses a nozzle to cool the plasma reactor, cools the reactor through the reaction outlet nozzle and liquid nitrogen water cooling, which can terminate the experiment and save energy. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the reaction termination device of the present invention, which uses a nozzle to cool a plasma reactor.

[0022] Explanation of reference numerals in the attached diagram: 1. Air inlet; 2. Quartz glass medium; 3. High-voltage electrode tube; 4. Spiral blade; 5. Grounding electrode; 6. Liquid nitrogen; 7. Nozzle; 8. Air outlet. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, this embodiment provides a reaction termination device for cooling a plasma reactor using a nozzle, including a quartz glass medium 2, a high-voltage electrode tube 3, a grounding electrode 5, and a nozzle 7; the quartz glass medium 2 is disposed around the high-voltage electrode tube 3, one end of the grounding electrode 5 extends to the outside of the quartz glass medium 2, and the other end of the grounding electrode 5 is grounded; one end of the quartz glass medium 2 is provided with an air inlet, one end of which is provided with an air inlet 1, and the other end of the air inlet is connected to the quartz glass medium 2 by fusion welding; one end of the nozzle 7 is connected to the other end of the quartz glass medium 2, and the other end of the nozzle 7 is provided with an air outlet 8.

[0025] The gas flows through the nozzle 7, the smallest part of the aperture is the throat of the nozzle, behind the throat there is a flow channel with gradually expanding aperture. When the stagnation pressure of the inlet of the nozzle is kept constant, the outlet pressure of the nozzle is gradually reduced, the gas flow through the nozzle is first increased constantly, when the critical pressure ratio is reached, the gas reaches the critical velocity in the throat of the nozzle 7, i.e. equal to the local sound velocity, the mass flow of the gas through the critical flow nozzle 7 reaches the maximum, and at the same time, the temperature is reduced to the minimum by means of the cooling of the liquid nitrogen 6, and the reaction gas is terminated due to the temperature reduction.

[0026] In the embodiment, the spiral blade 4 is sealed between the two layers of quartz glass medium 2, the spiral blade 4 is made of polyethylene material, and the spiral blade 4 is used to accelerate the gas in the quartz glass medium 2 to a higher flow rate to the nozzle 7.

[0027] The inside of the nozzle 7 is provided with a horn-shaped channel, and the outside of the nozzle 7 is used to be connected with the shell of the plasma reactor. The inlet member is made of 304 or 316 stainless steel; the pipe diameter of the inlet 1 is 30 mm. The discharge gap between the high-voltage electrode tube 3 and the quartz glass medium 2 is 2-3 cm. The high-voltage electrode tube 3 is made of 304 or 316 stainless steel. The inner diameter of the quartz glass medium 2 is 5 mm, and the wall thickness is 2-3 mm. The frequency of the power source connected with the high-voltage electrode tube 3 is 7-12 kHz, and the maximum voltage can reach 30 kV. The nozzle 7 is made of polypropylene with glass fiber and 316 stainless steel.

[0028] It should be noted that for those skilled in the art, it is obvious that the present application is not limited to the details of the above-mentioned exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application, and any reference signs in the claims should not be regarded as limiting the claims.

[0029] The principles and implementation manners of the present application are described by using specific examples in the specification, the above embodiment description is only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range will be changed. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A reaction termination device that uses a nozzle to cool a plasma reactor, characterized in that, The device includes a quartz glass medium, a high-voltage electrode tube, a grounding electrode, and a nozzle. The quartz glass medium is disposed around the high-voltage electrode tube. One end of the grounding electrode extends to the outside of the quartz glass medium, and the other end of the grounding electrode is grounded. One end of the quartz glass medium is provided with an air inlet, and the other end of the air inlet is connected to the quartz glass medium. One end of the nozzle is connected to the other end of the quartz glass medium, and the other end of the nozzle is provided with an air outlet. The quartz glass medium is provided with spiral blades, which are used to accelerate the gas in the quartz glass medium.

2. The reaction termination device for cooling a plasma reactor using a nozzle according to claim 1, characterized in that, The spiral blades are made of polyethylene.

3. The reaction termination device for cooling a plasma reactor using a nozzle according to claim 1, characterized in that, The nozzle is cooled by liquid nitrogen.

4. The reaction termination device for cooling a plasma reactor using a nozzle according to claim 1, characterized in that, The nozzle has a funnel-shaped channel on its inner side, and the outer side of the nozzle is used to connect to the outer shell of the plasma reactor.

5. The reaction termination device for cooling a plasma reactor using a nozzle according to claim 1, characterized in that, The air intake component is made of 304 or 316 stainless steel; the diameter of the air intake port is 30mm.

6. The reaction termination device for cooling a plasma reactor using a nozzle according to claim 1, characterized in that, The high-voltage electrode tube is made of 304 or 316 stainless steel.

7. The reaction termination device for cooling a plasma reactor using a nozzle according to claim 1, characterized in that, The quartz glass medium has an inner diameter of 5 mm and a wall thickness of 2-3 mm.

8. The reaction termination device for cooling a plasma reactor using a nozzle according to claim 1, characterized in that, The high-voltage electrode tube is connected to a power supply with a frequency of 7-12kHz and a maximum voltage of 30kV.

9. The reaction termination device for cooling a plasma reactor using a nozzle according to claim 1, characterized in that, The nozzle is made of glass fiber reinforced polypropylene and 316 stainless steel.

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