Adjustable gas distribution plasma combustion cavity

Abstract

The utility model discloses an adjustable gas distribution plasma combustion cavity which comprises a combustion cavity body and an adjustable gas distribution ring cavity. The adjustable gas distribution ring cavity is arranged around the plasma torch, a plurality of adjustable gas distribution nozzles are arranged on the outer wall of the adjustable gas distribution ring cavity in the circumferential direction in an array mode, and the adjustable gas distribution nozzles communicate with the adjustable gas distribution ring cavity in a movable connection mode through movable connection communicating pieces, so that the adjustable gas distribution nozzles can be driven by matched angle adjustment driving parts to adjust the gas injection angle alpha. Gas distribution can be dynamically optimized by adjusting the angle of the gas distribution nozzle, so that the tail gas plasma high-temperature treatment device is suitable for different tail gas flows and components, and the tail gas plasma high-temperature treatment efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to tail gas high temperature processing technical field especially relates to an adjustable gas distribution plasma combustion chamber. BACKGROUND

[0002] Tail gas plasma high temperature combustion treatment is very important in industrial tail gas treatment, the gas distribution structure of traditional combustion chamber is mostly fixed, when processing high, low flow rate or different component tail gas, it is difficult to realize accurate airflow control, leading to partial area tail gas treatment not thorough, and low processing efficiency, and fixed angle jet mode is difficult to optimize cyclone generation, limits the contact time of tail gas and plasma flame, influences processing effect. SUMMARY

[0003] The utility model discloses an adjustable gas distribution plasma combustion chamber, through the angle adjustment of gas distribution nozzle, can dynamically optimize gas distribution, thereby adapt to different tail gas flow and component, improve tail gas plasma high temperature processing efficiency.

[0004] Technical scheme: in order to realize above-mentioned purpose, the utility model discloses an adjustable gas distribution plasma combustion chamber, including combustion chamber body and adjustable gas distribution ring cavity, the adjustable gas distribution ring cavity is set up around plasma torch, and the outer wall circumferential array of it is provided with a plurality of adjustable gas distribution nozzles, the adjustable gas distribution nozzle is communicated with adjustable gas distribution ring cavity through loose joint, and the adjustable gas distribution nozzle can be driven to adjust the jet angle alpha by the angle adjustment drive part of matched.

[0005] Further, the jet angle alpha is the included angle between the axis of adjustable gas distribution nozzle and the tangent of the combustion chamber body where the adjustable gas distribution nozzle is located, and the jet angle alpha is acute angle.

[0006] Further, the outer wall of adjustable gas distribution ring cavity and the inner wall of combustion chamber body limit the gas shaping ring cavity containing adjustable gas distribution nozzle, and the gas rotating to form gas cyclone surrounding plasma flame in gas shaping ring cavity is emitted from several adjustable gas distribution nozzles.

[0007] Further, the adjustable gas distribution nozzle, loose joint and angle adjustment drive part are one to one, and the independent angle adjustment of each adjustable gas distribution nozzle is realized.

[0008] Further, the loose joint includes outer spherical shell and inner spherical shell, the inner spherical shell is connected with the outer spherical shell through the vertical pivot of shell surface, the output shaft of angle adjustment drive part is connected with the vertical pivot, the outer spherical shell is connected with the gas outlet of combustion chamber body outer wall through mounting pipe, the adjustable gas distribution nozzle is communicated with the inner spherical shell, and the air inlet is formed in the inner spherical shell.

[0009] Further, the angle adjusting driving part is a servo motor.

[0010] Further, the side wall of the combustion cavity body has a heat insulation interlayer filled with heat insulation filler or circulating with heat insulation fluid medium.

[0011] Further, the inner wall of the combustion cavity body is coated with a multilayer composite coating, including a high-temperature resistant ceramic layer as a bottom layer, a corrosion-resistant alloy layer as a middle layer and a self-cleaning nano coating as a surface layer.

[0012] Beneficial effects: The adjustable gas distribution nozzle angle can dynamically optimize gas distribution, so as to adapt to different tail gas flow and composition, realize flexible airflow control, improve tail gas plasma high-temperature treatment efficiency, and the circumferential array distribution of the gas distribution nozzle ensures uniform airflow introduction into the combustion cavity to form a stable cyclone structure, thereby enhancing cyclone selectivity, reducing tail gas escape and improving high-temperature treatment thoroughness. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a half-sectional structure schematic view of the combustion cavity;

[0014] Figure 2 is Figure 1 is an enlarged schematic view of the structure of the A area;

[0015] Figure 3 is a top view structural schematic view of the adjustable gas distribution ring cavity. DETAILED DESCRIPTION

[0016] The utility model will be further described below in combination with the drawings.

[0017] As Figure 1 and Figure 3 shown, an adjustable gas distribution plasma combustion cavity includes a combustion cavity body 1 and an adjustable gas distribution ring cavity 2; the adjustable gas distribution ring cavity 2 is arranged with a plasma torch 3, and a plurality of adjustable gas distribution nozzles 4 are circumferentially arrayed on the outer wall of the adjustable gas distribution ring cavity 2; the adjustable gas distribution nozzles 4 are connected to the adjustable gas distribution ring cavity 2 through a loose joint communication piece 5, so that the adjustable gas distribution nozzles 4 can be driven to adjust the jet angle α by a matching angle adjusting driving part 6. The adjustable gas distribution nozzle angle can dynamically optimize gas distribution, so as to adapt to different tail gas flow and composition, realize flexible airflow control, improve tail gas plasma high-temperature treatment efficiency, and the circumferential array distribution of the gas distribution nozzle ensures uniform airflow introduction into the combustion cavity to form a stable cyclone structure, thereby enhancing cyclone selectivity, reducing tail gas escape and improving high-temperature treatment thoroughness.

[0018] As Figure 3As shown, the jet angle a is the included angle between the axis 4a of the adjustable air distribution nozzle 4 and the tangent 1a of the combustion chamber body 1 where the adjustable air distribution nozzle 4 is located, and the jet angle a is an acute angle. The acute jet can enhance the tangential component of the airflow, form a high-speed rotating cyclone, prolong the contact time of the exhaust gas with the plasma flame, and the acute angle design can reduce the collision loss of the airflow and the cavity wall, reduce the system pressure drop, and reduce the energy consumption.

[0019] The outer wall of the adjustable air distribution ring cavity 2 and the inner wall of the combustion chamber body 1 limit the gas shaping ring cavity containing the adjustable air distribution nozzle 4. The gas emitted from the plurality of adjustable air distribution nozzles 4 rotates in the gas shaping ring cavity to form a gas rotating flow surrounding the plasma flame. The gas shaping ring cavity limits the airflow path, forms a high-intensity rotating flow, completely wraps the plasma flame, improves the harmful gas decomposition efficiency, and the rotating flow can accelerate the dust to the center of the combustion area to avoid the carbon deposition on the cavity wall.

[0020] The adjustable air distribution nozzle 4, the loose joint connecting part 5 and the angle adjusting drive part 6 are one-to-one corresponding, the independent angle adjustment of each adjustable air distribution nozzle 4 is realized, the angle of the adjustable air distribution nozzle 4 can be adjusted for the exhaust gas concentration uneven area, and the local treatment efficiency is improved.

[0021] As shown in the figure, Figure 2 As shown, the loose joint connecting part 5 includes an outer spherical shell 51 and an inner spherical shell 52, the inner spherical shell 52 is connected and matched with the outer spherical shell 51 through a vertical rotating shaft 54 of the shell surface, the output shaft of the angle adjusting drive part 6 is connected with the vertical rotating shaft 54, the outer spherical shell 51 is connected with the gas outlet 10 of the outer wall of the combustion chamber body 1 through the mounting pipe 53, the adjustable air distribution nozzle 4 is connected with the inner spherical shell 52, and the inner spherical shell 52 is provided with a gas inlet 55. The spherical hinge structure allows ±15° fine adjustment, the jet angle control precision reaches ±0.5°, the cyclone shape is stable, the outer spherical shell 51 and the inner spherical shell 52 are made of high-temperature resistant alloy, and there is no jamming in a 2000℃ environment, and the reliability is ensured.

[0022] In the utility model, as preferred, the angle adjusting drive part 6 is a servo motor, and the control precision is higher.

[0023] The side wall of the combustion chamber body 1 has a heat preservation interlayer 11, the heat preservation interlayer 11 is filled with heat preservation filler or circulated with heat preservation fluid medium, heat energy loss is reduced, and the structural damage of the cavity wall caused by thermal stress is reduced.

[0024] The inner wall of the combustion chamber body 1 is provided with a multilayer composite coating, which comprises a high-temperature resistant ceramic layer forming a bottom layer, a corrosion-resistant alloy layer forming a middle layer and a self-cleaning nano coating layer forming a surface layer, has super-high temperature resistance, and has corrosion resistance and self-cleaning ability, wherein the nano coating layer decomposes the carbon deposition through photocatalysis.

[0025] The above merely is the preferred implementation form of the present application, and it should be noted that for the ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. An adjustable gas distribution plasma combustion chamber, characterized by: The application relates to a plasma torch, which comprises a combustion cavity body (1) and an adjustable air distribution ring cavity (2); the adjustable air distribution ring cavity (2) is arranged around a plasma torch (3), and a plurality of adjustable air distribution nozzles (4) are arranged in the circumferential direction on the outer wall of the adjustable air distribution ring cavity (2); the adjustable air distribution nozzles (4) are connected to the adjustable air distribution ring cavity (2) through loose-joint connecting pieces (5), so that the adjustable air distribution nozzles (4) can be driven to adjust the jet angle alpha through a matched angle adjusting driving part (6).

2. The tunable gas distribution plasma combustion chamber of claim 1, wherein: The jet angle alpha is the included angle between the axis (4a) of the adjustable air distribution nozzle (4) and the tangent (1a) of the combustion cavity body (1) where the adjustable air distribution nozzle (4) is located, and the jet angle alpha is an acute angle.

3. The tunable gas distribution plasma combustion chamber of claim 1, wherein: The outer wall of the adjustable air distribution ring cavity (2) and the inner wall of the combustion cavity body (1) limit a gas shaping ring cavity for accommodating the adjustable air distribution nozzle (4), and the gas rotatingly formed by the adjustable air distribution nozzles (4) forms a gas rotating flow surrounding the plasma flame in the gas shaping ring cavity.

4. The tunable gas distribution plasma combustion chamber of claim 1, wherein: The adjustable air distribution nozzle (4), the loose-joint connecting piece (5) and the angle adjusting driving part (6) are one-to-one corresponding, so that the independent angle adjustment of each adjustable air distribution nozzle (4) is realized.

5. The tunable gas distribution plasma combustion chamber of claim 1, wherein: The loose-joint connecting piece (5) comprises an outer spherical shell (51) and an inner spherical shell (52), the inner spherical shell (52) is connected to the outer spherical shell (51) through spherical hinge connection of the shell surfaces and vertical rotating shafts (54), the output shaft of the angle adjusting driving part (6) is connected to the vertical rotating shafts (54), the outer spherical shell (51) is connected to the gas outlet (10) of the outer wall of the combustion cavity body (1) through a mounting pipe (53), the adjustable air distribution nozzle (4) is connected to the inner spherical shell (52), and the inner spherical shell (52) is provided with a gas inlet (55).

6. The tunable gas distribution plasma combustion chamber of claim 1, wherein: The angle adjusting driving part (6) is a servo motor.

7. The tunable gas distribution plasma combustion chamber of claim 1, wherein: The side wall of the combustion cavity body (1) is provided with a heat preservation interlayer (11), and the heat preservation interlayer (11) is filled with heat preservation filling or circulated with heat preservation fluid medium.

8. The tunable gas distribution plasma combustion chamber of claim 1, wherein: The inner wall of the combustion cavity body (1) is provided with a multilayer composite coating, which comprises a high-temperature-resistant ceramic layer as a bottom layer, an anti-corrosion alloy layer as a middle layer and a self-cleaning nano coating as a surface layer.

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