An aromatic compound waste gas oxygenation cracking treatment device and its installation method

Abstract

The application discloses an aromatic compound waste gas oxygenation cracking treatment device and a mounting method thereof. The treatment device comprises a spray tank for treating aromatic-containing waste gas, an upper portion of the spray tank is provided with a spray pipe for spraying alkali liquor to absorb the aromatic-containing waste gas, and the spray pipe is connected with an atomizing nozzle through a connecting pipe below the spray pipe. Both sides of the connecting pipe are provided with first connecting parts for connecting with the atomizing nozzle, an upper portion of the atomizing nozzle is provided with an inner lining pipe, both sides of the inner lining pipe are provided with second connecting parts matched with the first connecting parts, and the first connecting parts and the second connecting parts are connected with the connecting pipe and the inner lining pipe through plug-in cooperation. The atomizing nozzle can be quickly assembled through steps such as plug-in and extrusion, and additional work and time are not needed. Through the structural design of the rotating part and the rotating plate, the air tightness of the atomizing nozzle can be adjusted according to the needs, and the connection between the nozzle and the connecting pipe is ensured to be airtight.

Description

Technical Field

[0001] This invention relates to an oxygen-based pyrolysis treatment device for aromatic hydrocarbon waste gas and its installation method. Background Technology

[0002] Aromatic compounds, mainly benzoyl chloride series products, benzyl chloride series products, benzaldehyde series products, etc., generate harmful waste gas during the production process. The main components of the waste gas are chlorinated benzene compounds, mainly dichlorotoluene and fluorotoluene. The highest VOCs concentration is about 2000 mg / m³, and the highest concentration is about 3000 mg / m³ when the summer temperature is high. The total waste gas volume is about 4000 m³ / h. The waste gas needs to be purified and treated to meet the emission standards before it can be safely discharged.

[0003] Traditional waste gas treatment systems typically employ a two-stage alkaline scrubbing followed by activated carbon adsorption. During alkaline scrubbing, atomizing nozzles are used to atomize the alkaline solution, increasing the contact area between the solution and the aromatic hydrocarbon waste gas. However, commercially available atomizing nozzles exhibit several problems after prolonged use. First, replacing and disassembling the nozzles is relatively inconvenient, requiring additional work and time. Second, prolonged use may lead to wear or aging of the nozzle seals, reducing sealing effectiveness. Third, defects or incomplete fits at the nozzle installation or connection interfaces can cause gas or liquid leaks. Therefore, this paper proposes an oxygen-based pyrolysis treatment device for aromatic hydrocarbon waste gas and its installation method. Summary of the Invention

[0004] The purpose of this invention is to provide an oxygen-based pyrolysis treatment device for aromatic hydrocarbon waste gas and its installation method, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an oxygen-induced cracking treatment device for aromatic compound waste gas, comprising a spray tank for treating aromatic waste gas, wherein the upper part of the spray tank is provided with a spray pipe for spraying alkaline solution to absorb the aromatic waste gas, and the lower part of the spray pipe is connected to an atomizing nozzle through a connecting pipe.

[0006] The connecting pipe has a first connecting part on both sides for connecting to the atomizing nozzle.

[0007] The upper part of the atomizing nozzle is provided with an inner liner tube, and the two sides of the inner liner tube are provided with second connecting parts that cooperate with the first connecting part.

[0008] The first connecting part and the second connecting part are connected to the connecting pipe and the inner lining pipe by inserting and splicing;

[0009] An adjusting member for adjusting the connection tightness between the connecting pipe and the atomizing nozzle is provided on the outer periphery of the inner lining pipe, and a rotating member for driving the adjusting member is connected to the outer periphery of the connecting pipe.

[0010] Preferably, the first connecting portion includes an elastic component provided on one side of the connecting pipe, an arc-shaped clamping plate is provided on one side of the elastic component, and multiple groups of clamping strips are provided on the surface of the arc-shaped clamping plate.

[0011] Preferably, the elastic component includes multiple groups of first springs distributed in an arc shape, and the first springs are located inside the arc-shaped clamping plate for the elastic movement of the arc-shaped clamping plate.

[0012] Preferably, convex rods are provided around the arc-shaped clamping plate on the side of the clamping strips, a top cap is connected to the upper portion of the convex rods, and the top cap is located on the outer periphery of the connecting pipe.

[0013] A channel for the movement of the top cap is provided on the outer periphery of the connecting pipe.

[0014] Preferably, the second connecting portion includes an insertion plate, multiple groups of connecting plates that cooperate with the clamping strips are provided on the inner periphery of the insertion plate, and the shape of the connecting plates is an arc-shaped triangular prism.

[0015] Preferably, a pulling plate is connected to the side of the insertion plate away from the connecting plates, a groove for buckling and pulling is provided at the lower portion of the pulling plate, and insertion slots for connecting the insertion plate are provided on both sides of the pulling plate.

[0016] Preferably, a sealing gasket is provided on the upper portion of the inner lining pipe, the cross-sectional shape of the inner lining pipe is "soil" shaped, and an external thread is provided in the middle of the inner lining pipe.

[0017] The fitting member includes a rotating plate provided on the outer periphery of the external thread, and a number of tooth grooves are provided on the outer periphery of the rotating plate;

[0018] A second spring is provided on the outer periphery of the middle portion of the inner lining pipe, and the second spring is located above the rotating plate.

[0019] Preferably, side cavities for connecting the elastic components are provided on both sides of the connecting pipe.

[0020] Preferably, the rotating member includes a rotating wheel provided on one side of the connecting pipe, and the rotating wheel cooperates with the tooth grooves of the rotating plate.

[0021] An installation method for an apparatus for catalytic oxidative cracking of aromatic compound waste gas includes the following steps:

[0022] Step A: Assembly of the atomizing nozzle;

[0023] Step A1: Align the inlets on both sides of the top of the inner liner tube with the side cavity at the bottom of the connecting tube. At the same time, the toothed groove of the rotating plate and the rotating wheel cooperate with each other. Then, hold the pull plate and insert the insert plate through the inlet into the side cavity, so that the insert plate is inserted to the bottom of the side cavity.

[0024] Step A2: The insert plate presses the arc-shaped locking plate in the side cavity through the connecting plate, causing the arc-shaped locking plate to be pressed against the elastic component. The first spring in the elastic component is compressed, and the arc-shaped locking plate moves inward.

[0025] Step A3: When the insert plate is inserted to the bottom of the side cavity, the first spring elastically extends, driving the arc-shaped locking plate to move outward. At the same time, the connecting strip abuts against one side of the connecting plate, limiting the connecting plate to the side cavity, thus completing the assembly of the connecting tube and the atomizing nozzle.

[0026] Step B: Adjusting the airtightness of the atomizing nozzle;

[0027] Step B1: Gently rotate the rotating wheel by hand. This will cause it to rotate around the outer circumference of the connecting tube, engaging with the toothed grooves of the rotating plate and causing the rotating plate to rotate in the middle of the inner liner tube.

[0028] Step B2: The internal thread of the rotating plate matches the external thread of the inner circumference of the inner liner tube, so that the rotating plate moves upward along the external thread on the outer circumference of the inner liner tube and compresses the second spring.

[0029] Step B3: The second spring is compressed and deformed under force, which generates elastic potential energy. This energy acts on the upper part of the inner liner tube, causing it to move upward and squeeze the sealing gasket. The sealing gasket is squeezed and pressed against the retaining ring position on the inner circumference of the connecting tube, filling the gap between the inner liner tube and the connecting tube and completing the adjustment of the airtightness of the atomizing nozzle.

[0030] Step C: Replace the atomizing nozzle;

[0031] Step C1: Simultaneously press the four sets of top caps located on the outer periphery of the connecting tube, so that they squeeze the arc-shaped locking plate through the convex rod, squeeze the first spring and cause it to retract, and the arc-shaped locking plate moves inward under force;

[0032] Step C2: The locking strip of the arc-shaped locking plate is misaligned with the connecting plate of the insert plate, thus releasing the connection between the locking strip and the connecting plate.

[0033] Step C3: Use your hand to pull the groove so that the insert plate can be moved out of the side cavity through the pull plate, and disassemble the atomizing nozzle connected to the inner liner tube;

[0034] Step C4: Connect the replaced atomizing nozzle to the inner liner tube, and repeat steps A-B to complete the replacement of the atomizing nozzle.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] The assembly of the atomizing nozzle of this invention is simpler; the assembly of the atomizing nozzle can be completed quickly through steps such as plugging and squeezing, without the need for additional work and time.

[0037] The airtightness of the atomizing nozzle is effectively regulated; through the structural design of the rotating parts and the rotating plate, the airtightness of the atomizing nozzle can be adjusted as needed to ensure a tight connection between the nozzle and the connecting pipe and to prevent gas or liquid leakage.

[0038] Replacing the atomizing nozzle is now much easier; by pulling the groove and inserting the plate, the original atomizing nozzle can be quickly removed and replaced with a new one without any extra work or time.

[0039] It improves atomization effect and exhaust gas treatment efficiency; through the design of the atomizing nozzle, the contact area between the alkaline solution and the aromatic compound exhaust gas can be increased, thereby improving the atomization effect and enhancing the efficiency of exhaust gas treatment. Attached Figure Description

[0040] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of the spray tank structure according to an embodiment of the present invention;

[0042] Figure 3 This is a schematic diagram of the connecting pipe structure according to an embodiment of the present invention;

[0043] Figure 4 This is a schematic diagram of the transverse cross-sectional structure of the connecting pipe according to an embodiment of the present invention;

[0044] Figure 5 This is a schematic diagram of the longitudinal section structure of the connecting pipe according to an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of the insert structure according to an embodiment of the present invention;

[0046] Figure 7 This is a schematic diagram of the inner liner tube structure according to an embodiment of the present invention.

[0047] In the diagram: 1. Spray tank; 2. Spray pipe; 3. Connecting pipe; 301. Channel; 302. Side cavity; 4. Atomizing nozzle; 5. First connecting part; 501. Arc-shaped locking plate; 502. Locking strip; 503. First spring; 504. Protruding rod; 505. Top cap; 6. Inner liner; 601. External thread; 7. Second connecting part; 701. Insert plate; 702. Connecting plate; 703. Pull plate; 704. Groove; 705. Insertion port; 8. Adjusting component; 801. Rotating plate; 802. Toothed groove; 803. Second spring; 9. Rotating component; 901. Rotating wheel; 10. Sealing gasket. Detailed Implementation

[0048] To address the problems of inconvenient replacement and disassembly of existing atomizing nozzles and poor airtightness, this invention provides an oxygen-based pyrolysis treatment device for aromatic hydrocarbon waste gas and its installation method. The technical solution of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described invention is only a part of this invention, not all of it. All other inventions obtained by those skilled in the art based on this invention without inventive effort are within the scope of protection of this invention.

[0049] Please see Figure 1-7 The present invention provides an oxygen-based cracking treatment device for aromatic hydrocarbon waste gas, including a spray tank 1 for treating aromatic hydrocarbon waste gas, wherein the upper part of the spray tank 1 is provided with a spray pipe 2 for spraying alkaline solution to absorb aromatic hydrocarbon waste gas, and the lower part of the spray pipe 2 is connected to an atomizing nozzle 4 through a connecting pipe 3.

[0050] The connecting pipe 3 has a first connecting part 5 on both sides for connecting to the atomizing nozzle 4.

[0051] The upper part of the atomizing nozzle 4 is provided with an inner liner tube 6, and the two sides of the inner liner tube 6 are provided with second connecting parts 7 that cooperate with the first connecting part 5.

[0052] The first connecting part 5 and the second connecting part 7 are connected to the connecting pipe 3 and the inner liner pipe 6 by inserting and splicing.

[0053] The outer periphery of the inner liner tube 6 is provided with an adjusting member 8 for adjusting the airtightness of the connection between the connecting tube 3 and the atomizing nozzle 4, and the outer periphery of the connecting tube 3 is connected with a rotating member 9 for driving the adjusting member 8.

[0054] Furthermore, the first connecting part 5 includes an elastic component disposed on one side of the connecting tube 3, and an arc-shaped locking plate 501 is disposed on one side of the elastic component, and a plurality of locking strips 502 are disposed on the surface of the arc-shaped locking plate 501.

[0055] Furthermore, the elastic component includes multiple sets of first springs 503 arranged in an arc shape, and the first springs 503 are located inside the arc-shaped locking plate 501 for elastic movement of the arc-shaped locking plate 501.

[0056] Furthermore, the arc-shaped locking plate 501 is provided with protruding rods 504 around one side of the locking strip 502. The upper part of the protruding rods 504 is connected to a top cap 505, and the top cap 505 is located on the outer periphery of the connecting tube 3.

[0057] The outer periphery of the connecting pipe 3 is provided with a channel 301 for the movement of the top cap 505.

[0058] Furthermore, the second connecting portion 7 includes a plug board 701. Multiple connecting plates 702 that cooperate with the clamping strips 502 are arranged on the inner circumference of the plug board 701, and the connecting plates 702 are in the shape of arc-shaped triangular prisms.

[0059] Furthermore, a pulling board 703 is connected to the side of the plug board 701 away from the connecting plate 702. A groove 704 for buckling and pulling is formed in the lower part of the pulling board 703, and insertion openings 705 for connecting the plug board 701 are formed on both sides of the pulling board 703.

[0060] Furthermore, a sealing gasket 10 is arranged on the upper part of the inner lining pipe 6. The cross-sectional shape of the inner lining pipe 6 is in the shape of "soil", and an external thread 601 is formed in the middle of the inner lining pipe 6.

[0061] The fitting 8 includes a rotating plate 801 arranged on the outer circumference of the external thread 601. A plurality of tooth grooves 802 are formed on the outer circumference of the rotating plate 801.

[0062] A second spring 803 is arranged on the outer circumference of the middle part of the inner lining pipe 6, and the second spring 803 is located above the rotating plate 801.

[0063] Furthermore, side cavities 302 for connecting the elastic components are formed on both sides of the connecting pipe 3.

[0064] Furthermore, the rotating member 9 includes a rotating wheel 901 arranged on one side of the connecting pipe 3. The rotating wheel 901 cooperates with the tooth grooves 802 of the rotating plate 801.

[0065] An installation method for an oxy-cracking treatment device for aromatic compound waste gas includes the following steps:

[0066] Step A: Assembly of the atomizing nozzle 4.

[0067] Step A1: Align the insertion openings 705 on both sides of the top of the inner lining pipe 6 with the side cavities 302 at the lower part of the connecting pipe 3. At the same time, the tooth grooves 802 of the rotating plate 801 cooperate with the rotating wheel 901. Then, hold the pulling board 703 and insert the plug board 701 through the insertion openings 705 into the side cavities 302 until the plug board 701 is inserted to the bottom of the side cavities 302.

[0068] Step A2: The plug board 701 presses the arc-shaped clamping plate 501 in the side cavity 302 through the connecting plate 702, causing the arc-shaped clamping plate 501 to press the elastic component. The first spring 503 in the elastic component is compressed by force, and the arc-shaped clamping plate 501 moves inward.

[0069] Step A3: When the insert plate 701 is inserted into the bottom of the side cavity 302, the first spring 503 stretches elastically, causing the arc-shaped locking plate 501 to move outward. At the same time, the connecting strip 502 abuts against one side of the connecting plate 702, limiting the connecting plate 702 into the side cavity 302, thus completing the assembly of the connecting tube 3 and the atomizing nozzle 4.

[0070] Step B: Adjusting the airtightness of the atomizing nozzle 4;

[0071] Step B1: Gently rotate the rotating wheel 901 by hand. This will cause it to rotate around the outer circumference of the connecting tube 3, engaging with the toothed groove 802 of the rotating plate 801, thus driving the rotating plate 801 to rotate in the middle of the inner liner tube 6.

[0072] Step B2: The internal thread of the inner circumference of the rotating plate 801 matches the external thread 601 of the outer circumference of the inner liner tube 6, so that the rotating plate 801 moves and rotates upward along the external thread 601 on the outer circumference of the inner liner tube 6, compressing the second spring 803.

[0073] Step B3: The second spring 803 is compressed and deformed under force, which generates elastic potential energy. This energy acts on the upper part of the inner liner tube 6, causing it to move upward and squeeze the sealing gasket. The sealing gasket is squeezed and pressed against the retaining ring position on the inner circumference of the connecting tube 3, filling the gap between the inner liner tube 6 and the connecting tube 3, thus completing the adjustment of the airtightness of the atomizing nozzle 4.

[0074] Step C: Replacement of atomizing nozzle 4;

[0075] Step C1: Simultaneously press the four sets of top caps 505 located on the outer periphery of the connecting tube 3, so that they squeeze the arc-shaped locking plate 501 through the protruding rod 504, squeeze the first spring 503 and make it contract, and the arc-shaped locking plate 501 moves inward under force.

[0076] Step C2: The locking strip 502 of the arc-shaped locking plate 501 is misaligned with the connecting plate 702 of the insert plate 701, thus releasing the connection between the locking strip 502 and the connecting plate 702.

[0077] Step C3: Pull the groove 704 by hand so that the insert plate 701 can be removed from the side cavity 302 through the pull plate 703, and disassemble the atomizing nozzle 4 connected to the inner liner tube 6.

[0078] Step C4: Connect the replaced atomizing nozzle 4 to the inner liner tube 6, and repeat steps A-B to complete the replacement of the atomizing nozzle 4.

[0079] The present invention provides an oxygen-assisted pyrolysis treatment device for aromatic hydrocarbon waste gas and its installation method, which has the following advantages:

[0080] The atomizing nozzle 4 of this invention is easier to assemble; through steps such as plugging and squeezing, the atomizing nozzle 4 can be assembled quickly without additional work and time.

[0081] The airtightness of the atomizing nozzle 4 is effectively regulated; through the structural design of the rotating part 9 and the rotating plate 801, the airtightness of the atomizing nozzle 4 can be adjusted as needed to ensure a tight connection between the nozzle and the connecting pipe 3 and to prevent gas or liquid leakage.

[0082] Replacing the atomizing nozzle 4 is more convenient; by pulling the groove 704 and inserting the insert plate 701, the original atomizing nozzle 4 can be quickly removed and replaced with a new atomizing nozzle 4 without additional work and time.

[0083] The atomization effect and exhaust gas treatment efficiency are improved. The design of the atomizing nozzle 4 increases the contact area between the alkaline solution and the aromatic compound exhaust gas, thereby improving the atomization effect and enhancing the efficiency of exhaust gas treatment.

[0084] Although the invention has been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these inventions without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oxygen-based pyrolysis treatment device for aromatic hydrocarbon waste gas, characterized in that: It includes a spray tank (1) for treating aromatic waste gas, and the upper part of the spray tank (1) is provided with a spray pipe (2) for spraying alkaline solution to absorb aromatic waste gas. The lower part of the spray pipe (2) is connected to an atomizing nozzle (4) through a connecting pipe (3). The connecting tube (3) is provided with a first connecting part (5) on both sides for connecting with the atomizing nozzle (4). The first connecting part (5) includes an elastic component on one side of the connecting tube (3). An arc-shaped locking plate (501) is provided on one side of the elastic component. The surface of the arc-shaped locking plate (501) is provided with multiple sets of locking strips (502). The upper part of the atomizing nozzle (4) is provided with an inner liner tube (6), and the two sides of the inner liner tube (6) are provided with a second connecting part (7) that cooperates with the first connecting part (5). The second connecting part (7) includes a plate (701). The inner circumference of the plate (701) is provided with multiple sets of connecting plates (702) that cooperate with the clip (502), and the shape of the connecting plate (702) is an arc-shaped triangular truncated pyramid. The first connecting part (5) and the second connecting part (7) are connected to the connecting pipe (3) and the inner lining pipe (6) by inserting and fitting together; The outer periphery of the inner liner tube (6) is provided with an adjusting member (8) for adjusting the sealing of the connection between the connecting tube (3) and the atomizing nozzle (4). The adjusting member (8) includes a rotating plate (801) disposed on the outer periphery of the external thread (601). The outer periphery of the rotating plate (801) is provided with a plurality of toothed grooves (802). A second spring (803) is provided on the outer periphery of the middle part of the inner liner tube (6), and the second spring (803) is located above the rotating plate (801); The outer periphery of the connecting tube (3) is connected to a rotating element (9) for driving the adjusting element (8).

2. The oxygen-assisted cracking treatment device for aromatic hydrocarbon waste gas according to claim 1, characterized in that: The elastic component includes multiple sets of first springs (503) arranged in an arc shape, and the first springs (503) are located inside the arc-shaped locking plate (501) for elastic movement of the arc-shaped locking plate (501).

3. The oxygen-assisted cracking treatment device for aromatic hydrocarbon waste gas according to claim 2, characterized in that: The arc-shaped locking plate (501) has protruding rods (504) around one side of the locking strip (502). The upper part of the protruding rods (504) is connected to a top cap (505), and the top cap (505) is located on the outer periphery of the connecting tube (3). The outer periphery of the connecting tube (3) is provided with a channel (301) for the movement of the top cap (505).

4. The oxygen-assisted cracking treatment device for aromatic hydrocarbon waste gas according to claim 3, characterized in that: The insert plate (701) is connected to a pull plate (703) on the side away from the connecting plate (702). The lower part of the pull plate (703) is provided with a groove (704) for fastening. The two sides of the pull plate (703) are provided with sockets (705) for connecting the insert plate (701).

5. The oxygen-assisted cracking treatment device for aromatic hydrocarbon waste gas according to claim 4, characterized in that: The upper part of the inner liner tube (6) is provided with a sealing gasket (10), the cross-sectional shape of the inner liner tube (6) is "earth" shaped, and the middle part of the inner liner tube (6) is provided with an external thread (601).

6. The oxygen-induced cracking treatment device for aromatic hydrocarbon waste gas according to claim 5, characterized in that: The connecting tube (3) has side cavities (302) on both sides for connecting the elastic components.

7. The oxygen-assisted cracking treatment device for aromatic hydrocarbon waste gas according to claim 6, characterized in that: The rotating component (9) includes a rotating wheel (901) disposed on one side of the connecting pipe (3), and the rotating wheel (901) cooperates with the tooth groove (802) of the rotating plate (801).

8. An installation method for an oxygen-based cracking treatment device for aromatic hydrocarbon waste gas according to any one of claims 1-7, characterized in that: Includes the following steps: Step (A), assembly of the atomizing nozzle (4); Step (A1): Align the inlets (705) on both sides of the top of the inner liner tube (6) with the side cavity (302) at the bottom of the connecting tube (3), and at the same time, the toothed groove (802) of the rotating plate (801) and the rotating wheel (901) cooperate with each other. Then, hold the pull plate (703) and insert the insert plate (701) through the inlet (705) into the side cavity (302) so that the insert plate (701) is inserted to the bottom of the side cavity (302). Step (A2): The insert plate (701) presses the arc-shaped locking plate (501) in the side cavity (302) through the connecting plate (702), so that the arc-shaped locking plate (501) is forced to press the elastic component, the first spring (503) in the elastic component is compressed, and the arc-shaped locking plate (501) moves inward. Step (A3): When the insert plate (701) is inserted into the bottom of the side cavity (302), the first spring (503) stretches elastically, causing the arc-shaped locking plate (501) to move outward. At the same time, the connecting strip (502) abuts against one side of the connecting plate (702), limiting the connecting plate (702) to the side cavity (302), thus completing the assembly of the connecting tube (3) and the atomizing nozzle (4). Step (B), adjustment of the airtightness of the atomizing nozzle (4); Step (B1): Gently turn the rotating wheel (901) by hand to make it rotate around the outer circumference of the connecting tube (3), and cooperate with the tooth groove (802) of the rotating plate (801) to drive the rotating plate (801) to rotate in the middle of the inner liner tube (6); Step (B2): The inner thread of the rotating plate (801) matches the outer thread (601) of the inner liner tube (6), so that the rotating plate (801) moves and rotates upward along the outer thread (601) on the outer circumference of the inner liner tube (6), squeezing the second spring (803). In step (B3), the second spring (803) is subjected to force and undergoes compression deformation, thereby generating elastic potential energy, which acts on the upper part of the inner liner tube (6), causing it to move upward and squeeze the sealing gasket. The sealing gasket is squeezed and pressed against the retaining ring position on the inner circumference of the connecting tube (3), filling the gap between the inner liner tube (6) and the connecting tube (3) to complete the adjustment of the airtightness of the atomizing nozzle (4). Step (C), replacement of the atomizing nozzle (4); Step (C1): Simultaneously press the four sets of top caps (505) located on the outer periphery of the connecting tube (3), so that they squeeze the arc-shaped locking plate (501) through the protruding rod (504), squeeze the first spring (503) and make it contract, and the arc-shaped locking plate (501) moves inward under force; Step (C2): The locking strip (502) of the arc-shaped locking plate (501) is misaligned with the connecting plate (702) of the insert plate (701), thus releasing the connection between the locking strip (502) and the connecting plate (702). Step (C3): Pull the groove (704) by hand to remove the insert plate (701) from the side cavity (302) through the pull plate (703), and disassemble the atomizing nozzle (4) connected to the inner liner tube (6); Step (C4): Connect the replaced atomizing nozzle (4) to the inner liner tube (6), and repeat steps (A)-(B) to complete the replacement of the atomizing nozzle (4).

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