Compensation air inlet flange and tail gas treatment system

Abstract

The application discloses a kind of compensation inlet flange and tail gas treatment system, belong to tail gas treatment technical field, solve the problem that the outlet of cyclone inlet flange is far from plasma torch head in prior art, the surface of plasma torch head is accumulated with a large amount of dust caused by the continuous reduction of airflow intensity in the flow process.The flange includes a purge base, a purge inlet and an inlet channel connected to the inlet are provided on the purge base, the inlet channel is directed to the sidewall of the plasma torch head, and the airflow provided by the gas supply unit sequentially passes through the purge inlet and the inlet channel to purge the plasma torch head.The present application can be used for tail gas treatment.

Description

Technical Field

[0001] This invention belongs to the field of exhaust gas treatment technology, specifically relating to a compensating intake flange and an exhaust gas treatment system. Background Technology

[0002] For exhaust gases with high dust content, dust will mainly accumulate on the exhaust gas inlet flange and plasma torch head during the exhaust gas treatment process. In order to reduce dust accumulation, a swirl inlet flange is usually installed below the exhaust gas inlet flange to blow away the dust below the exhaust gas inlet flange.

[0003] However, due to installation and size limitations, the outlet of the swirl inlet flange is far from the plasma torch head. In practical applications, a large amount of dust will still accumulate on the surface of the plasma torch head. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a compensation inlet flange and exhaust gas treatment system, which solves the problem in the prior art where the outlet of the swirl inlet flange is far from the plasma torch head, resulting in a large amount of dust accumulating on the surface of the plasma torch head.

[0005] The objective of this invention is mainly achieved through the following technical solutions:

[0006] This invention provides a compensating air intake flange, which is located at the bottom of the exhaust gas intake flange of the exhaust gas treatment system. At least a portion of the plasma torch head penetrates the exhaust gas intake flange. The compensating air intake flange includes a purging base, on which a purging air inlet and an intake channel connected to the air inlet are provided. The intake channel faces the side wall of the plasma torch head. The airflow provided by the gas supply unit passes through the purging air inlet and the intake channel in sequence to purge the plasma torch head.

[0007] Furthermore, the purge air inlet is set in a vertical direction.

[0008] Furthermore, the axis of the intake channel is set horizontally and is inclined radially relative to the purge substrate, forming a horizontal spiral airflow within the purge substrate.

[0009] Furthermore, the projection of the air intake channel axis onto the radial plane of the purging substrate is set along the radial direction of the purging substrate, and the air intake channel axis is inclined away from the plasma torch head.

[0010] Furthermore, there are multiple intake channels and multiple purge intake ports.

[0011] Furthermore, multiple air intake channels are evenly arranged, and multiple purge air intakes are evenly arranged.

[0012] Furthermore, the number of air intake channels and purge air intakes are both 2 to 8.

[0013] Furthermore, the inner diameter of the purging substrate is 50–75 mm.

[0014] Furthermore, the angle between the axis of the intake passage and the radial direction of the purging substrate is 20° to 50°.

[0015] The present invention also provides an exhaust gas treatment system, including the aforementioned compensating intake flange.

[0016] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0017] A) The compensating air intake flange provided by the present invention introduces nitrogen gas flow into the air intake channel on the side wall of the compensating air intake flange facing the plasma torch head, which can blow away the dust accumulated on the side wall of the plasma torch head.

[0018] B) The compensating air intake flange provided by the present invention can increase the gas pressure in the space surrounding the side wall of the plasma torch head, so that no flow dead zone will be generated in the bottom space of the exhaust gas intake flange surrounded by the compensating air intake flange, thereby reducing the occurrence of dust particle backflow; at the same time, nitrogen gas flow is introduced into the air intake channel on the compensating air intake flange facing the lower part of the plasma torch head. This gas flow concentrates the purging of the lower part of the plasma torch head, reduces the accumulation of dust under the plasma torch head, and prevents dust from entering the plasma torch head from the lower opening.

[0019] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0020] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts. Attached image description:

[0022] Figure 1 This is a schematic diagram of the structure of the compensating intake flange provided in Embodiment 1 of the present invention;

[0023] Figure 2 for Figure 1 Radial sectional view;

[0024] Figure 3 This is an exploded view of the exhaust gas treatment system provided in Embodiment 2 of the present invention;

[0025] Figure 4 This is a partial cross-sectional view of the exhaust gas treatment system provided in Embodiment 2 of the present invention;

[0026] Figure 5 This is a schematic diagram showing the positions of the intake pipe and the purging assembly in the exhaust gas treatment system provided in Embodiment 2 of the present invention;

[0027] Figure 6 This is a schematic diagram of the gas swirl flange in the exhaust gas treatment system provided in Embodiment 2 of the present invention;

[0028] Figure 7 for Figure 6 Radial sectional view;

[0029] Figure 8 This is a schematic diagram showing the positions of the flange separator, the exhaust gas inlet flange, and the swirl inlet flange in the exhaust gas treatment system provided in Embodiment 2 of the present invention.

[0030] Figure 9 This is a schematic diagram showing the connection of the exhaust gas inlet flange, swirl inlet flange, water curtain flange, and clamp in the exhaust gas treatment device provided in Embodiment 2 of the present invention.

[0031] Figure label:

[0032] 1-Purge main pipe; 2-Purge branch pipe; 3-Purge through hole; 4-Inlet pipe; 5-Support plate; 6-Plasma torch head; 7-Fastener; 8-Compensation inlet flange; 81-Purge base; 82-Purge inlet; 83-Airflow channel; 9-Gas swirl flange; 10-Airflow ring channel; 11-Inlet hole; 12-Outlet hole; 13-Tail gas inlet flange; 14-Swirl inlet flange; 15-First protrusion; 16-Second protrusion; 17-Separation screw; 18-First locking block; 19-Locking screw; 20-Second locking block; 21-Water curtain flange; 22-Flange; 23-Reaction chamber. Detailed Implementation

[0033] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of the present invention and, together with the embodiments of the present invention, serve to illustrate the principles of the present invention.

[0034] Example 1

[0035] This embodiment provides a compensating intake flange, see [link / reference] Figures 1 to 2 The compensation intake flange is located at the bottom of the exhaust gas intake flange of the exhaust gas treatment system. It includes a purging base 81, which is a single-layer structure. A purging intake port 82 and an intake channel 83 are provided on the purging base 81. The intake channel 83 faces the side wall of the plasma torch head. The airflow provided by the gas supply unit passes through the purging intake port 82 and the intake channel 83 in sequence to purge the plasma torch head.

[0036] In this embodiment, a gas supply unit is used to provide nitrogen gas flow to the air intake channel 83. However, in other embodiments, air or other inert gases may also be introduced into the air intake channel 83, which does not depart from the scope of the present invention.

[0037] In existing technologies, a swirl inlet flange is typically installed between the exhaust gas inlet flange and the pyrolysis chamber or reaction chamber. To facilitate the installation and gas supply of the swirl inlet flange, its outer diameter needs to be approximately equal to that of the exhaust gas inlet flange. To facilitate the flow of exhaust gas, its inner diameter needs to be approximately equal to that of the exhaust gas inlet flange, the pyrolysis chamber, or the reaction chamber. Consequently, the outlet of the swirl inlet flange is far from the plasma torch head. When the nitrogen gas supplied from the outlet of the swirl inlet flange reaches the plasma torch head, the flow velocity is low, making it impossible to effectively blow away the dust accumulated on the plasma torch head.

[0038] Compared with the prior art, the compensation intake flange provided in this embodiment is provided at the bottom of the exhaust gas intake flange, and nitrogen gas flow is introduced into the intake channel 83 on the side wall of the compensation intake flange facing the plasma torch head. On the one hand, it blows away the dust accumulated on the side wall of the plasma torch head.

[0039] On the other hand, the setting of the compensation inlet flange can also increase the gas pressure in the space around the side wall of the plasma torch head, so that no flow dead zone will be generated in the bottom space of the exhaust gas inlet flange surrounded by the compensation inlet flange, thereby reducing the occurrence of dust particle backflow; at the same time, nitrogen gas flow is introduced into the inlet channel 83 on the compensation inlet flange facing the lower part of the plasma torch head. This gas flow concentrates the purging of the lower part of the plasma torch head, reduces the accumulation of dust under the plasma torch head, and prevents dust from entering the plasma torch head from the opening under the plasma torch head.

[0040] For example, the purge inlet 82 is arranged in a vertical direction. In order to improve the uniformity of the purge, the axis of the inlet channel 83 is arranged in a horizontal direction and is radially inclined relative to the purge base 81, forming a horizontal spiral airflow in the purge base 81. The horizontal spiral airflow can uniformly purge the area around the plasma torch head.

[0041] Alternatively, the purge inlet 82 is arranged vertically. From the perspective of purge intensity, the projection of the axis of the inlet channel 83 onto the radial plane of the purge base 81 is arranged radially along the purge base 81, and the axis of the inlet channel 83 is inclined away from the plasma torch head (i.e., inclined downward). In this way, the airflow blown out from the inlet channel 83 can directly purge the sidewall and / or surroundings of the plasma torch head with high intensity.

[0042] To improve airflow uniformity, multiple intake channels 83 and multiple purge inlets 82 are used, with each intake channel 83 and purge inlet 82 evenly arranged, and each pair of intake channels 83 and purge inlets 82 corresponding one-to-one. For example, the number of intake channels 83 and purge inlets 82 may be 2 to 8. Figure 2 The diagram shows that both have 4.

[0043] Accordingly, in order to ensure the purging intensity, the specific parameters of the purging substrate 81 and the air inlet channel 83 are as follows:

[0044] The inner diameter of the purging substrate 81 is 50-75 mm, and the angle α between the axis of the air intake channel 83 and the radial direction of the purging substrate 81 is 20°-50°.

[0045] Example 2

[0046] This embodiment provides an exhaust gas treatment system, see [link / reference] Figures 3 to 4 The system includes a plasma torch head 6, a compensating air intake flange 8, and an intake pipe 4, an exhaust gas intake flange 13, a swirl intake flange 14, a water curtain flange 21, and a reaction chamber 23 connected in sequence. The compensating air intake flange 8 is the compensating air intake flange provided in Embodiment 1. The exhaust gas enters the exhaust gas treatment system from the intake pipe 4, and the airflow direction is intake pipe 4 → exhaust gas intake flange 13 → swirl intake flange 14 → water curtain flange 21 → reaction chamber 23. The compensating air intake flange 8 is located at the bottom of the exhaust gas intake flange 13. The plasma torch head 6 at least partially penetrates the through hole in the center of the exhaust gas intake flange 13 and protrudes downward into the compensating air intake flange 8, thereby reducing the possibility of blockage at the lower end opening of the plasma torch head 6.

[0047] Compared with the prior art, the beneficial effects of the exhaust gas treatment system provided in this embodiment are basically the same as those of the compensating intake flange provided in Embodiment 1, and will not be described in detail here.

[0048] To reduce dust accumulation in the intake manifold 4, the exhaust gas treatment system also includes a purging assembly. For an example of the structure of the purging assembly, see [link to relevant documentation]. Figure 5 It includes a purge main pipe 1 and a purge branch pipe 2. The purge branch pipe 2 is located in the air inlet pipe 4 and extends along the length of the air inlet pipe 4. Multiple purge through holes 3 are opened on the purge branch pipe 2. The purge main pipe 1 penetrates the inner wall of the air inlet pipe 4. One end of the purge main pipe 1 is connected to the air supply equipment, and the other end is connected to the purge branch pipe 2. The length of the purge branch pipe 2 can be less than, equal to or greater than the length of the air inlet pipe 4.

[0049] Thus, when treating exhaust gas with a high dust content, the gas supply equipment is turned on, and the gas (e.g., nitrogen, compressed air, etc.) in the equipment is sequentially blown into the intake pipe 4 through the main purge pipe 1, the branch purge pipe 2, and the purge through-hole 3 to purge the dust deposited on the side wall of the intake pipe 4. A branch purge pipe 2 extending along the length of the intake pipe 4 is installed inside the intake pipe 4, and a purge through-hole 3 is provided on the branch purge pipe 2. Nitrogen gas is delivered to the purge through-hole 3 through the main purge pipe 1 and the branch purge pipe 2, and then blown into the intake pipe 4 through the purge through-hole 3. Because the nitrogen gas flow from each purge through-hole 3 has sufficient intensity, it can uniformly and comprehensively purge the dust deposited at different locations on the inner wall of the intake pipe 4, effectively reducing the problem of severe dust accumulation in the intake pipe 4 and ensuring the normal intake of the exhaust gas treatment system.

[0050] To further reduce the backflow of generated dust particles, the exhaust gas treatment system, exemplarily, also includes a gas swirl flange 9 disposed on top of the purge base 81. For the structure of the gas swirl flange 9, see [link to documentation]. Figures 6 to 7 An airflow channel 10 is provided on the gas swirl flange 9. An air inlet 11 is provided on the outer wall of the airflow channel 10, and an air outlet 12 is provided on the inner wall of the airflow channel 10. The air outlet 12 is inclined relative to the radial direction of the gas swirl flange 9, and the air inlet 11 is arranged along the radial direction of the gas swirl flange 9.

[0051] In this way, a gas swirl flange 9 is installed on the top of the purging substrate 81. Nitrogen gas is supplied through the gas swirl flange 9 to increase the gas pressure in the top space, which basically does not produce flow dead zones, thereby reducing the occurrence of backflow of generated dust particles. At the same time, since the gas swirl flange 9 can generate a spiral flow, it can properly flush the bottom of the exhaust gas inlet flange 13 and accelerate the flow of dust particles, thereby reducing the deposition of dust particles at the bottom of the exhaust gas inlet flange 13.

[0052] In this embodiment, the gas supplied to the gas swirl flange 9 can be nitrogen, but it should be understood that it can also be air or other inert gases.

[0053] In order to reduce the shaking of the purging assembly during the purging process, the purging assembly also includes a support plate 5 on the outer wall of the air inlet pipe 4. The support plate 5 has a support through hole, and the air inlet pipe 4 has an installation through hole. The positions of the support through hole and the installation through hole are corresponding. The main purging pipe 1 passes through the support through hole and the installation through hole and is fixedly connected to both. In this way, by setting the support plate 5, the wall thickness of the air inlet pipe 4 is increased, thereby providing stable support for the main purging pipe 1.

[0054] In order to achieve stable installation of the purge main pipe 1 and prevent the purge main pipe 1 from coming out of the support through hole and the mounting through hole, the purge assembly of the air inlet pipe 4 also includes a fastener 7. The fastener 7 is located on the side of the support plate 5 away from the air inlet pipe 4. The fastener 7 is sleeved on the outer wall of the purge main pipe 1 and fixedly connected to the purge main pipe 1, so that the fastener 7 is fixed to the support plate 5. In other words, the purge assembly is fixed to the air inlet pipe 4.

[0055] To facilitate the installation of the purging assembly, the inner diameter of the intake pipe 4 is greater than the sum of the length of the main purging pipe 1 and the outer diameter of the purging branch pipe 2, so that there is enough space in the intake pipe 4 to accommodate the installation of the purging assembly.

[0056] It is worth noting that during exhaust gas treatment in the exhaust gas treatment system, its internal space is usually a negative pressure environment. Separating the exhaust gas inlet flange 13 and the swirl inlet flange 14 often requires the operator to pry open the connection point using tools. However, the gap at the connection point is very small, making it difficult to insert tools, resulting in inconvenient and laborious operation, and potentially damaging both the exhaust gas inlet flange 13 and the swirl inlet flange 14. Therefore, the aforementioned compensating inlet flange also includes a flange separation component, see [link to documentation]. Figure 8 The exhaust gas intake flange 13 and the swirl intake flange 14 are stacked. The flange separation component includes a first protrusion 15, a second protrusion 16 and a separation screw 17. The first protrusion 15 is connected to the exhaust gas intake flange 13 and the second protrusion 16 is connected to the swirl intake flange 14. The first protrusion 15 is located at the edge of the exhaust gas intake flange 13 and the second protrusion 16 is located at the edge of the swirl intake flange 14. One end of the separation screw 17 passes through the first protrusion 15 and abuts against the swirl intake flange 14. The separation screw 17 and the first protrusion 15 can be operably moved relative to each other. For example, the two can be connected by threads.

[0057] When it is necessary to separate the exhaust gas intake flange 13 from the swirl intake flange 14, rotate the separation screw 17 so that the separation screw 17 is further screwed into the first protrusion 15, that is, the separation screw 17 moves towards the swirl intake flange 14. At this time, after the separation screw 17 abuts against the swirl intake flange 14, continue to turn the separation screw 17 and move it downwards by 2 to 8 mm. A gap is created at the connection between the exhaust gas intake flange 13 and the swirl intake flange 14, thus completing the separation of the exhaust gas intake flange 13 and the swirl intake flange 14.

[0058] To improve the overall integrity of the exhaust gas treatment system, the exhaust gas inlet flange 13, the swirl inlet flange 14, the water curtain flange 21, and the reaction chamber 23 are fixedly connected by clamps. The clamps include a first clamping block 18, a second clamping block 20, and a locking screw 19. See [link / reference needed] Figure 9One end of the locking screw 19 is connected to the first locking block 18, and the other end of the locking screw 19 is connected to the second locking block 20. The first locking block 18 is located on the upper surface of the exhaust gas inlet flange 13, and the second locking block 20 is located on the lower surface of the top flange 22 of the reaction chamber 23.

[0059] During the assembly of the exhaust gas treatment system, the exhaust gas inlet flange 13, the swirl inlet flange 14, the water curtain flange 21, and the reaction chamber 23 are stacked in sequence. The first locking block 18 is locked onto the upper surface of the exhaust gas inlet flange 13, and the swirl inlet flange 14 is locked onto the lower surface of the top flange 22 of the reaction chamber 23. Then, the first locking block 18 and the second locking block 20 are locked with locking screws 19 to achieve a fixed connection between the exhaust gas inlet flange 13, the swirl inlet flange 14, the water curtain flange 21, and the reaction chamber 23.

[0060] In this way, the caliper with the above structure can easily lock the exhaust gas inlet flange 13 and the swirl inlet flange 14 into a whole without the need to drill bolt holes on the exhaust gas inlet flange 13 and the swirl inlet flange 14, which can effectively reduce the processing difficulty and ensure the airtightness of the exhaust gas treatment system. In addition, the caliper can be adapted to any position on the edge of the exhaust gas inlet flange 13 and the swirl inlet flange 14 according to different structures, so that the structure and position of each component of the compensation inlet flange can be designed more flexibly without having to consider the position of the caliper too much.

[0061] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An exhaust gas treatment system, characterized in that, It includes a plasma torch head, a compensation inlet flange, and an inlet pipe, an exhaust gas inlet flange, and a swirl inlet flange connected in sequence. The exhaust gas enters the exhaust gas treatment system from the inlet pipe, and the airflow direction is in the order of the inlet pipe, the exhaust gas inlet flange, and the swirl inlet flange. The compensation intake flange is located on the bottom surface of the exhaust gas intake flange, and at least part of the plasma torch head penetrates the exhaust gas intake flange. The compensation intake flange includes a purging base, on which a purging intake port and an intake channel connected to the intake port are provided. The intake channel faces the side wall of the plasma torch head. The airflow provided by the gas supply unit passes through the purging intake port and the intake channel in sequence to purge the plasma torch head. The compensation intake flange is spaced on the radial inner side of the swirl intake flange.

2. The exhaust gas treatment system according to claim 1, characterized in that, The purge air inlet is arranged in a vertical direction.

3. The exhaust gas treatment system according to claim 1, characterized in that, The axis of the air intake channel is set horizontally and is inclined radially relative to the purging substrate, forming a horizontal spiral airflow within the purging substrate.

4. The exhaust gas treatment system according to claim 1, characterized in that, The projection of the axis of the air intake channel onto the radial plane of the purging substrate is set along the radial direction of the purging substrate, and the axis of the air intake channel is inclined away from the plasma torch head.

5. The exhaust gas treatment system according to claim 1, characterized in that, There are multiple air intake channels and multiple purge air intakes.

6. The exhaust gas treatment system according to claim 5, characterized in that, Multiple air intake channels are evenly arranged, and multiple purge air intakes are evenly arranged.

7. The exhaust gas treatment system according to claim 6, characterized in that, The number of air intake channels and purge air inlets is 2 to 8.

8. The exhaust gas treatment system according to claim 1, characterized in that, The inner diameter of the purging substrate is 50~75mm.

9. The exhaust gas treatment system according to any one of claims 1 to 8, characterized in that, The angle between the axis of the air intake channel and the radial direction of the purging substrate is 20°~50°.

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