Dry type plasma tail gas treatment device

Abstract

The utility model relates to the technical field of tail gas treatment, in particular to a dry type plasma tail gas treatment device which comprises a shell, a gas inlet pipe assembly, a main cavity, a reaction cavity, a cooling cavity, a water tank, a cooling box, a rear end cavity, a gas collecting barrel, a first adsorption barrel and a second adsorption barrel. A plasma torch device is arranged on the main cavity, a reaction cavity, a cooling cavity and a water tank are sequentially connected to the main cavity through flanges, a cooling box and a rear-end cavity are sequentially connected to the water tank, a discharge port is formed in the end of the rear-end cavity, the rear-end cavity is connected with a gas collecting barrel, and a valve is arranged between the rear-end cavity and the gas collecting barrel. The gas collecting barrel is connected with the first adsorption barrel and the second adsorption barrel respectively. The plasma waste gas treatment device solves the problem that an existing plasma waste gas treatment device is poor in cooling effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to tail gas treatment technical field especially relates to a dry plasma tail gas treatment device. BACKGROUND

[0002] In recent years, plasma technology has been gradually applied in the field of waste gas treatment. Plasma is a partially ionized gas state, under high enough energy, gas molecules can be decomposed into free radicals, ions and other active particles. By using this characteristic, plasma can effectively convert harmful components in waste gas into harmless or low-harm substances such as H2O and CO2. Compared with traditional methods, plasma technology has the advantages of fast reaction speed, high treatment efficiency, wide application range, etc., especially suitable for treating pollutants that are difficult to remove by conventional means.

[0003] However, the existing plasma waste gas treatment device still faces some challenges, especially in the aspect of cooling effect. Because the temperature generated in the plasma treatment process is extremely high, if it cannot be cooled in time and effectively, not only the safety and stability of the equipment will be affected, but also the tail gas treatment will not be complete, and the expected purification effect cannot be achieved. The cooling system of the existing device usually includes simple water cooling or air cooling, but in actual application, these cooling methods often cannot provide enough heat exchange area and uniform temperature distribution, leading to local overheating phenomenon, and further affecting the performance and life of the whole system. In addition, poor cooling effect may also cause the adsorbent to be saturated in advance, reduce the adsorption efficiency, and increase the maintenance cost.

[0004] The utility model discloses a dry plasma tail gas treatment device to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] The utility model provides a dry plasma tail gas treatment device, aims at solving the problem of poor cooling effect of the existing plasma waste gas treatment device. Its technical scheme is as follows:

[0006] A dry plasma tail gas treatment device, comprising a shell, an air inlet pipe assembly, a main cavity, a reaction cavity, a cooling cavity, a water tank, a cooling box, a rear end cavity, a gas collection barrel, a first adsorption barrel and a second adsorption barrel, the air inlet pipe assembly is connected with the main cavity, the main cavity is provided with a plasma torch device, the main cavity is sequentially flange connected with the reaction cavity, the cooling cavity and the water tank, the water tank is sequentially connected with the cooling box and the rear end cavity, the rear end cavity is provided with an exhaust port at the end, the rear end cavity is connected with the gas collection barrel, a valve is arranged between the rear end cavity and the gas collection barrel, and the gas collection barrel is connected with the first adsorption barrel and the second adsorption barrel.

[0007] On the basis of the above technical solutions, the air inlet pipe assembly comprises two groups of air inlet pipes, the air inlet pipes comprise a first air pipe, a second air pipe, a main air pipe and a three-way pneumatic valve, and the openings of the three-way pneumatic valve are connected with the first air pipe, the second air pipe and the main air pipe respectively.

[0008] Further, the main cavity is provided with a main cavity interlayer, and a main cavity water pipe is arranged on the main cavity and communicates with the main cavity interlayer.

[0009] Preferably, a reaction cavity interlayer is arranged in the reaction cavity, and a reaction cavity water pipe is arranged on the reaction cavity and communicates with the reaction cavity interlayer.

[0010] Advantages

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the multistage cooling system ensures rapid cooling of the gas during the treatment process, maintains a suitable working temperature, avoids local overheating, and thus improves the stability and safety of the system. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only one embodiment of the present application, and for those skilled in the art, other drawings can be obtained from the provided drawings without creative labor.

[0013] Figure 1 : the structure diagram of the utility model;

[0014] Figure 2 : the structure diagram of the shell of the utility model;

[0015] Figure 3 : the structure diagram of the internal structure of the utility model;

[0016] Figure 4 : the perspective view of the internal structure of the utility model;

[0017] Figure 5 : the structure diagram of the air inlet pipe assembly of the utility model;

[0018] Figure 6 : the sectional view of the main cavity, the reaction cavity, the cooling cavity, the water tank and the cooling box of the utility model;

[0019] Figure 7The utility model discloses a structure schematic drawing of sink.

[0020] Figure 8 The utility model discloses a structure schematic drawing of cooling box.

[0021] Figure 9 The utility model discloses a structure schematic drawing of first adsorption barrel and second adsorption barrel.

[0022] Figure 10 The utility model discloses an internal structure schematic drawing of first adsorption barrel and second adsorption barrel. DETAILED DESCRIPTION

[0023] The utility model will be further described below in connection with the drawings and examples:

[0024] The embodiments of the utility model will be described below in detail, and the examples of the embodiments are shown in the drawings, wherein the same or similar signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used for explaining the utility model and cannot be understood as the limitation of the utility model.

[0025] In the description of the utility model, it is necessary to explain that, unless another explicit provision and limitation, the terms "mount", "connect", "connection" should be understood broadly, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be directly connected, also can be indirectly connected through the intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0026] In the description of the utility model, it is necessary to understand that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as the limitation of the utility model.

[0027] As Figures 1 to 4As shown, a dry plasma exhaust gas treatment device is characterized by comprising: a shell 1, an inlet pipe assembly 2, a main cavity 30, a reaction chamber 3, a cooling chamber 4, a water tank 5, a cooling box 6, a rear cavity 7, a gas collection tank 8, a first adsorption tank 91, and a second adsorption tank 92. The inlet pipe assembly 2 is connected to the main cavity 30. A plasma torch device 301 is installed on the main cavity 30. The reaction chamber 3, the cooling chamber 4, and the water tank 5 are sequentially connected to the main cavity 30 via flanges. The cooling box 6 and the rear cavity 7 are sequentially connected to the water tank 5. An outlet 71 is provided at the end of the rear cavity 7. The rear cavity 7 is connected to the gas collection tank 8. A valve 80 is provided between the rear cavity 7 and the gas collection tank 8. The gas collection tank 8 is connected to the first adsorption tank 91 and the second adsorption tank 92. The shell 1 is provided with a door 11, a display table 12, a display screen 13, control buttons 14, and a heat dissipation mesh 15. The shell 1 is also provided with a control system. The intake manifold assembly 2, main chamber 30, reaction chamber 3, and cooling chamber 4 are all connected, and the cooling box 6 and rear chamber 7 are connected.

[0028] like Figure 5 As shown, the intake pipe assembly 2 includes two sets of intake pipes, each comprising a first intake pipe 21, a second intake pipe 22, a main intake pipe 23, and a three-way pneumatic valve 24. The openings of the three-way pneumatic valve 24 are connected to the first intake pipe 21, the second intake pipe 22, and the main intake pipe 23, respectively. The three-way pneumatic valve 24 allows for flexible selection of which intake pipe to introduce gas from, or simultaneous introduction of different proportions of gas from both pipes. This flexibility allows the equipment to adjust the intake gas composition according to different treatment requirements, adapting to various waste gas types and treatment conditions. The first intake pipe 21 and the second intake pipe 22 consist of straight pipes and corrugated pipes. The corrugated pipes have good elasticity and can absorb the thermal expansion or contraction of the pipes caused by temperature changes. This helps reduce stress caused by temperature changes and prevents pipe rupture or leakage at connections.

[0029] like Figure 6 As shown, the main cavity 30 is provided with a main cavity interlayer 302, and a main cavity water pipe 303 is provided on the main cavity 30. The outlet of the main cavity water pipe 303 is connected to the main cavity interlayer 302. The main cavity 30 has an outer wall and an inner wall, and a main cavity interlayer 302 is formed between the outer wall and the inner wall. Water can be injected into the main cavity interlayer 302 through the main cavity water pipe 303 to cool the exhaust gas when it comes into contact with the inner wall. The main cavity water pipe 303 is provided with a main cavity water inlet and a main cavity water outlet.

[0030] The reaction cavity 3 is provided with a reaction cavity interlayer 32, and the reaction cavity 3 is provided with a reaction cavity water pipe 33, the outlet of the reaction cavity water pipe 33 is communicated with the reaction cavity interlayer 32. The reaction cavity 3 has an inner wall and an outer wall, and the reaction cavity interlayer 32 is formed between the inner wall and the outer wall. Water can be injected into the reaction cavity interlayer 32 through the reaction cavity water pipe 33, so that the tail gas is cooled when it contacts the inner wall. The reaction cavity water pipe 33 is provided with a reaction cavity water inlet and a reaction cavity water outlet.

[0031] The interlayer allows the internal temperature of the reaction cavity to be controlled by injecting water or other cooling media. This helps to maintain an appropriate working temperature range, ensuring optimal conditions for plasma reactions while preventing overheating from causing damage to the equipment. The cavity 30 and the reaction cavity 3 are provided with a reaction cavity interlayer 32, and a cooling system inside it, which not only helps to optimize the reaction environment, prolong the service life of the equipment, enhance safety and adapt to different working conditions, but also simplifies maintenance work and improves energy utilization efficiency. These features work together to make the dry plasma tail gas treatment device more efficient, reliable and environmentally friendly.

[0032] The cooling cavity 4 is provided with a cooling cavity interlayer 42, and the cooling cavity 4 is provided with a cooling water pipe 41. The cooling cavity 4 is provided with a cooling cavity water pipe 43, the outlet of the cooling cavity water pipe 43 is communicated with the cooling cavity interlayer 42, and the cooling water pipe 41 is communicated with the cooling cavity interlayer 42. The cooling cavity 4 has an inner wall and an outer wall, and the cooling cavity interlayer 42 is formed between the inner wall and the outer wall. Water can be injected into the cooling cavity interlayer 42 through the cooling cavity water pipe 43, so that the tail gas is cooled when it contacts the inner wall and the cooling water pipe 41. The cooling cavity water pipe 43 includes a cooling cavity water inlet pipe and a cooling cavity water outlet pipe. Water is first filled into the cooling cavity interlayer 42, then flows into the cooling water pipe 41 from the cooling cavity interlayer 42, until the cooling water pipe 41 is full. The bottom of the cooling water pipe 41 is communicated with the cooling cavity interlayer 42, and the cooling cavity water outlet pipe of the cooling cavity water pipe 43 is used to drain water. Valves are provided on the main cavity water pipe 303, the reaction cavity water pipe 33 and the cooling cavity water pipe 43.

[0033] The design of the cooling cavity interlayer 42 and the cooling water pipe 41 provides a large area of heat exchange surface, so that the exhaust gas can be rapidly cooled when passing through the cooling cavity 4. Water is first filled into the cooling cavity interlayer 42, then flows into the cooling water pipe 41, ensuring uniform cooling effect and improving heat exchange efficiency. By setting valves on the main cavity water pipe 303, the reaction cavity water pipe 33 and the cooling cavity water pipe 43, the speed and amount of water flow can be accurately controlled, so as to realize fine adjustment of the cooling process. This helps to maintain stable operation of the entire system and ensures optimal conditions for tail gas treatment.

[0034] As Figure 7As shown, the water tank 5 includes a water tank 51 and a baffle 52. The baffle 52 is hollow and has a water inlet 53. Water can be injected into the hollow part of the baffle 52 through the water inlet 53. The baffles 52 can be arranged in an alternating pattern.

[0035] After being filled with water, the baffle 52 becomes a water-cooled structure, increasing the cooling area in contact with the exhaust gas. This design allows for more effective absorption of heat from the exhaust gas, thereby improving the overall cooling efficiency of the system. The staggered distribution of the baffles 52 helps to create a relatively uniform temperature field within the water tank, preventing localized overheating. This not only improves the consistency of cooling but also reduces the risk of stress and deformation caused by uneven temperature distribution. The staggered distribution of the baffles 52 alters the exhaust gas flow path, promoting turbulence and increasing the contact opportunities between the gas and water, thus enhancing heat exchange efficiency. This design is particularly advantageous for treating high-temperature exhaust gases.

[0036] like Figure 8 As shown, the cooling box 6 includes a cooling shell 61 and partitions 62, with the partitions 62 staggered within the cooling shell 61. Cooling water can be filled between the inner and outer walls of the cooling shell 61. The staggered partitions 62 increase the contact area between the exhaust gas and the cooling medium, thereby significantly improving heat exchange efficiency. More contact surface means more efficient heat transfer, allowing the exhaust gas to be cooled more quickly. Within a limited space, by cleverly designing the layout of the partitions, a larger cooling area can be achieved in a smaller volume, making the cooling box 6 more compact and efficient.

[0037] The first adsorption tank 91 includes a filter screen and an adsorbent, and the second adsorption tank 92 has the same structure as the first adsorption tank 91. The filter screen removes larger particles or droplets, preventing these impurities from entering the adsorbent layer and ensuring the effective operation of the adsorbent. The adsorbent is used to capture harmful components in the exhaust gas, such as volatile organic compounds and odorous substances, thereby achieving deep purification. The adsorbent in both the first and second adsorption tanks 91 and 92 uses adsorption balls, which are placed between the two filter screens. Adsorption balls typically have a large specific surface area, providing more active sites to capture harmful substances. This increases the adsorption capacity per unit volume, improving the removal efficiency of harmful components in the exhaust gas. The adsorption balls are regularly shaped and easy to fill, forming a relatively uniform layered structure between the two filter screens. This arrangement ensures uniform gas flow throughout the adsorption layer, avoiding problems such as overloading or insufficient adsorption in localized areas.

[0038] The gas collecting bucket 8 is connected to the first adsorption bucket 91 and the second adsorption bucket 92 through corrugated pipes and control valves. The control valves can accurately adjust the gas flow into each adsorption bucket, ensuring uniform distribution and sufficient contact between the gas and the adsorbent, thereby improving the processing efficiency. In addition, when necessary, a certain adsorption bucket can be isolated for maintenance or replacement by closing the control valve

[0039] The bottom of the first adsorption bucket 91 and the second adsorption bucket 92 is connected to the water tank 5 through the return port 90 pipeline.

[0040] The water tank 5, the first adsorption bucket 91 and the second adsorption bucket 92 are provided with universal wheels at the bottom. The universal wheels allow these components to be easily moved and repositioned in limited space. This is very advantageous for the installation, commissioning, and later maintenance and repair of the equipment, especially in situations where space is limited or the layout needs to be adjusted frequently.

[0041] The following is the working process of the device:

[0042] Gas inlet stage: The process exhaust gas first enters the system through the gas inlet pipe assembly 2. The assembly includes two sets of gas inlet pipes, each containing a first gas pipe 21, a second gas pipe 22 and a main gas pipe 23, and the gas flow and component ratio are flexibly adjusted through a three-way pneumatic valve 24. This ensures that different types of exhaust gas can be optimally processed.

[0043] Plasma treatment stage: The exhaust gas then enters the main cavity 30, where the plasma torch device 301 is installed. Through the plasma generating device, a high-temperature, jet-like plasma arc is formed. This arc ionizes, bombards and thermally decomposes the incoming process exhaust gas, converting the exhaust gas molecules into active particles. These active particles further react to form relatively harmless substances such as H2O and CO2. The main cavity 30 is provided with an air inlet hole through which air or oxygen is introduced.

[0044] Primary cooling stage: The gas after plasma treatment flows from the main cavity 30 into the reaction chamber 3. In order to prevent high temperature damage to subsequent equipment and improve processing efficiency, a sandwich cooling system is provided in these two cavities, which controls the temperature by injecting water to ensure a suitable working environment.

[0045] Deep cooling stage: Next, the gas enters the cooling chamber 4. Here not only is there a cooling chamber sandwich 42, but also an internal cooling water pipe 41. The cooling water flows through the sandwich and the water pipe, removing a large amount of heat, ensuring that the gas is effectively cooled when it comes into contact with the inner wall.

[0046] The gas continues to flow to the water tank 5. The baffles 52 in the water tank 5 are hollow and staggered, and water is injected into the baffles through the water injection port 53, increasing the cooling area and promoting turbulent flow, further reducing the gas temperature.

[0047] Finally, the gas enters the cooling box 6, in which the baffles 62 are staggered to enhance the heat exchange efficiency and guide the gas to cool uniformly. By this time, the gas has been cooled down for several times, ready for the subsequent adsorption step.

[0048] Adsorption purification stage: the cooled gas enters the gas collection bucket 8, and then is distributed to the first adsorption bucket 91 and the second adsorption bucket 92 through the corrugated pipes and control valves respectively. Each adsorption bucket is equipped with a filter screen and an adsorbent for capturing the remaining harmful substances or odor molecules and possibly for oxidation treatment. The bottom of the adsorption bucket is connected to the water tank 5 through a pipeline to maintain the circulation of the system.

[0049] Discharge and circulation stage: the adsorption-purified gas passes through the rear cavity 7 again and is finally discharged from the discharge port 71. If the initial adsorption effect is not ideal, the gas can be re-introduced into the front end of the system through the control system for multiple circulation treatments until the discharge standard is reached.

[0050] It should be noted that the adsorbent, adsorption ball, etc. of the embodiment are all general standard parts or components known to those skilled in the art, and their structures and principles can be known by those skilled in the art through technical manuals or through conventional experimental methods.

[0051] The utility model has been described above by way of example, but the utility model is not limited to the above specific embodiments, and any modification or variation made based on the utility model falls within the scope of the utility model claimed.

Claims

1. A dry plasma tail gas treatment apparatus, characterized by: The application relates to a plasma cutting machine, which comprises a shell (1), an air inlet pipe assembly (2), a main cavity (30), a reaction cavity (3), a cooling cavity (4), a water tank (5), a cooling box (6), a rear-end cavity (7), a gas collecting barrel (8), a first adsorption barrel (91) and a second adsorption barrel (92), the air inlet pipe assembly (2) is connected with the main cavity (30), the main cavity (30) is provided with a plasma torch device (301), the main cavity (30) is flange-connected with the reaction cavity (3), the cooling cavity (4) and the water tank (5) in sequence, the water tank (5) is connected with the cooling box (6) and the rear-end cavity (7) in sequence, the rear-end cavity (7) is provided with an exhaust port (71) at the end, the rear-end cavity (7) is connected with the gas collecting barrel (8), a valve (80) is arranged between the rear-end cavity (7) and the gas collecting barrel (8), and the gas collecting barrel (8) is connected with the first adsorption barrel (91) and the second adsorption barrel (92) respectively.

2. A dry plasma tail gas treatment device according to claim 1, characterized in that The air inlet pipe assembly (2) comprises two groups of air inlet pipes, the air inlet pipes comprise a first air pipe (21), a second air pipe (22), a main air pipe (23) and a three-way pneumatic valve (24), and the openings of the three-way pneumatic valve (24) are connected with the first air pipe (21), the second air pipe (22) and the main air pipe (23) respectively.

3. A dry plasma tail gas treatment device according to claim 2, characterized in that The main cavity (30) is provided with a main cavity interlayer (302), and the main cavity (30) is provided with a main cavity water pipe (303), and the outlet of the main cavity water pipe (303) is communicated with the main cavity interlayer (302).

4. A dry plasma tailgas processing apparatus according to claim 3, wherein The reaction cavity (3) is provided with a reaction cavity interlayer (32), and the reaction cavity (3) is provided with a reaction cavity water pipe (33), and the outlet of the reaction cavity water pipe (33) is communicated with the reaction cavity interlayer (32).

5. A dry plasma tailgas processing apparatus according to claim 4, wherein The cooling cavity (4) is provided with a cooling cavity interlayer (42), and the cooling cavity (4) is provided with a cooling water pipe (41) and a cooling cavity water pipe (43), the outlet of the cooling cavity water pipe (43) is communicated with the cooling cavity interlayer (42), and the cooling water pipe (41) is communicated with the cooling cavity interlayer (42).

6. A dry plasma tail gas treatment device according to claim 1, characterized in that The water tank (5) comprises a water tank (51) and a baffle (52), the baffle (52) is hollow, and the baffle (52) is provided with a water inlet (53).

7. A dry plasma tail gas treatment device according to claim 1, wherein The cooling box (6) comprises a cooling shell (61) and a partition plate (62), and the partition plate (62) is distributed in the cooling shell (61) in a staggered mode.

8. The dry plasma tailgas processing apparatus of claim 1, wherein The first adsorption barrel (91) comprises a filter screen and an adsorbent, and the second adsorption barrel (92) has the same structure as the first adsorption barrel (91).

9. The dry plasma tailgas processing apparatus of claim 1, wherein The gas collecting barrel (8) is provided with a bellows and a control valve between the first adsorption barrel (91) and the second adsorption barrel (92).

10. The dry plasma tailgas processing apparatus of claim 8, wherein The bottom of the first adsorption barrel (91) and the bottom of the second adsorption barrel (92) are connected with the water tank (5) through pipelines.

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