Waste gas treatment equipment for industrial salicylic acid preparation

Abstract

The utility model relates to the technical field of sewage treatment, in particular to waste gas treatment equipment for industrial salicylic acid preparation, which comprises a container. The device further comprises a neutralizing liquid adding pipeline which extends into the inner cavity of the container; a water storage layer is arranged at the bottom of the container and communicated with a wastewater discharge pipeline; a conical nozzle is arranged at a water outlet of the neutralization liquid adding pipeline; a nickel-platinum metal net catalyst layer is arranged in the container and is positioned above the water storage layer; a gas combing disc is arranged in the container, through holes are distributed in the gas combing disc, and the gas combing disc is arranged below the metal net catalyst layer; at least two layers of gas combing discs are arranged in the container; the device further comprises a waste gas inlet pipeline extending into the container, the waste gas inlet pipeline is provided with a gas outlet, the gas outlet discharges gas downwards and extends into the water storage layer, and the gas outlet is formed below the gas combing disc on the lowermost layer; and the air outlet pipeline is arranged at the top of the container. While waste gas is efficiently purified, the service life of waste gas treatment equipment is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of waste gas treatment, in particular to industrial salicylic acid waste gas treatment technology. BACKGROUND

[0002] Salicylic acid has important applications in various fields due to its rich uses and effects. However, during the industrial production of salicylic acid, incomplete reaction of phenol, by-products (such as benzoquinone substances) and volatile organic compounds may be produced in the waste gas. If the waste gas cannot be effectively treated, it will not only pollute the environment, but also cause harm to the body of the workers. Liquid absorption method has become one of the effective technologies for treating salicylic acid industrial waste gas due to its high efficiency, economy and convenient operation.

[0003] However, the waste gas has high temperature, and the solid particles in the waste gas will bring a great burden to the element equipment in the liquid absorption treatment, affecting the service life of the liquid absorption equipment. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a waste gas treatment equipment for industrial salicylic acid preparation to solve at least one of the above technical problems.

[0005] The technical problem solved by the utility model can be solved by the following technical scheme:

[0006] A waste gas treatment equipment for industrial salicylic acid preparation, comprising a container.

[0007] It also comprises a neutralizing liquid adding pipeline, which extends into the inner cavity of the container from the top of the container;

[0008] The bottom of the container has a water storage layer, and the water storage layer is connected with a waste water discharge pipeline;

[0009] The neutralizing liquid adding pipeline has a water outlet, and a downward conical nozzle is installed at the water outlet;

[0010] A nickel-platinum metal mesh catalytic layer is arranged in the container, the metal mesh catalytic layer is arranged below the conical nozzle, and the nickel-platinum metal mesh catalytic layer is located above the water storage layer;

[0011] A disc structure called a gas combing disc is arranged in the container, the gas combing disc is arranged below the metal mesh catalytic layer, and the gas combing disc is arranged above the water storage layer;

[0012] At least two layers of gas combing discs are arranged in the container, the lowermost layer of gas combing discs is arranged in the water storage layer, and the uppermost layer of gas combing discs is arranged above the water storage layer;

[0013] Further comprising a waste gas inlet pipeline extending into the container, the waste gas inlet pipeline having a gas outlet, the gas outlet extending downward and into the water storage layer, the gas outlet being disposed below the lowermost gas combing disc;

[0014] Further comprising a gas outlet pipeline disposed at the top of the container.

[0015] The above design, first, by setting the neutralizing liquid adding pipeline, adding neutralizing liquid (alkaline and oxidizing agent mixed solution) into the container, and spraying out through the conical nozzle, the acid and organic matter in the industrial waste gas can be neutralized, and the nickel-platinum metal mesh catalytic layer can accelerate catalysis to prevent waste gas pollution and harm to human body; secondly, by setting the gas combing disc, at least two layers of gas combing discs make the waste gas uniformly distributed in the container, so that the waste gas is uniformly mixed with the atomized neutralizing liquid, and the treatment effect of the waste gas is improved; finally, by setting the gas outlet of the waste gas inlet pipeline in the water storage layer at the bottom of the container and spraying gas downward, the waste gas can be preliminarily passed through water to reduce the temperature of the waste gas and dissolve part of the solid particles, and the lowermost gas combing disc is disposed in the water storage layer to further prevent the waste gas from directly rushing to the nickel-platinum metal mesh catalytic layer, thereby ensuring the service life of the nickel-platinum metal mesh catalytic layer and the conical nozzle. Thus, the service life of the waste gas treatment equipment is ensured while the waste gas is efficiently purified.

[0016] The conical nozzle is a nozzle designed to disperse liquid into a conical spray.

[0017] The gas combing disc is made of ceramic disc or metal disc with high temperature resistance, which can withstand the high temperature of the waste gas, and the neutralizing liquid falling from above can fall on the gas combing disc to cool the waste gas, preventing the waste gas from directly rushing to the nickel-platinum metal mesh catalytic layer or the conical nozzle of the container, thereby affecting their service life, thereby prolonging the service life of the waste gas treatment equipment for industrial salicylic acid preparation.

[0018] Preferably, the through holes on the adjacent gas combing discs are arranged in a staggered manner; the staggered arrangement of the through holes on the adjacent gas combing discs disrupts the waste gas smoke flow, making the waste gas more evenly rise upward, and the waste gas purification effect is better.

[0019] Preferably, the gas outlet of the waste gas inlet pipeline is disposed at the center of the gas combing disc; the waste gas is evenly dispersed to all directions, ensuring uniform distribution of the waste gas, and the waste gas purification effect is better.

[0020] Preferably, the through holes arranged on the gas combing disc are arranged in a manner that the diameter gradually increases from the center to the edge; the waste gas rises upward more evenly.

[0021] Preferably, at least three ultrasonic generators are arranged above the top layer of the comb gas disc, and the ultrasonic generators are arranged to emit ultrasonic waves towards the upper nickel-platinum metal mesh catalytic layer. The ultrasonic generators can enhance the mass transfer process, and the cavitation effect generated by the ultrasonic waves can accelerate the contact between the neutralizing liquid and the substances in the exhaust gas, break the gas-liquid interface resistance, and improve the reaction speed. The ultrasonic vibration can disperse the reactants uniformly, form micron-sized bubbles in the neutralizing liquid, and break the bubbles to avoid local over-concentration or precipitation, thereby ensuring the uniformity of the neutralization reaction.

[0022] Preferably, a float switch is arranged at the drainage outlet of the wastewater discharge pipeline, and the liquid level in the water storage layer is higher than the drainage outlet of the wastewater discharge pipeline to open the float switch. The float switch controls the opening and closing of the drainage outlet of the wastewater discharge pipeline to prevent the exhaust gas from being discharged along the wastewater discharge pipeline.

[0023] Preferably, the container has an upper end cover, the gas outlet pipeline is arranged on the upper end cover, and the neutralizing liquid adding pipeline penetrates through the upper end cover and extends into the container. A microwave lamp is arranged below the upper end cover and shines towards the nickel-platinum metal mesh catalytic layer from above. The nickel in the nickel-platinum metal mesh is a ferromagnetic metal, and under the action of microwaves (the frequency is usually 300 MHz-300 GHz), the free electrons on the surface of the metal are excited by the electromagnetic field to produce high-frequency oscillation, forming local hot spots or plasma, which significantly reduces the reaction activation energy and catalyzes the reaction between the exhaust gas and the neutralizing liquid.

[0024] Preferably, the inner wall of the upper end cover forms a space with the nickel-platinum metal mesh catalytic layer, which is called an air chamber, and the microwave lamp is arranged in the air chamber. A circulating fan is also arranged in the air chamber, and the blowing port of the circulating fan faces the nickel-platinum metal mesh catalytic layer. The circulating fan can further help mix the neutralizing liquid and the exhaust gas, improve the reaction speed and reaction effect of the exhaust gas.

[0025] Preferably, a water baffle is arranged above the conical nozzle, and the water baffle is fixed to the sewage inlet pipeline. A resonance membrane called a water baffle resonance membrane is arranged in the water baffle, and part of the water baffle resonance membrane is connected to the side of the conical nozzle. The water baffle can improve the coverage and spray quality of the spray, improve the uniformity of the water mist sprayed by the conical nozzle, and facilitate the full contact between the sprayed neutralizing agent water mist and the exhaust gas. The water baffle resonance membrane prevents the conical nozzle from being blocked and helps the sewage to be preliminarily atomized when being sprayed.

[0026] Preferably, the water baffle is further connected with a reflection cover below which water is bounced, the reflection cover is provided with a through hole in the middle; at least two reflection covers are arranged in sequence from top to bottom, and the through hole of the lower reflection cover is smaller than that of the upper reflection cover; another resonance film, referred to as a reflection resonance film, is arranged in the middle and lower part of the reflection cover and is attached to the lower end of the reflection cover; by arranging the reflection cover, the conical water mist sprayed by the conical nozzle is reflected into a multi-layer tower-shaped water mist structure, further optimizing the contact effect of the exhaust gas and the neutralizing liquid, and ensuring that the neutralization effect of the exhaust gas is more complete. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings. Among them:

[0028] Figure 1 is a schematic diagram of the internal structure of the device of the present application;

[0029] Figure 2 is another schematic diagram of the internal structure of the device of the present application from another perspective;

[0030] Figure 3 is a schematic diagram of the overall appearance structure of the device of the present application. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings of the specification.

[0032] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0033] Secondly, the present application is described in detail in combination with the schematic diagram, in the detailed description of the embodiments of the present application, for the convenience of description, the cross-sectional view of the device structure will be partially enlarged without general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application here. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual production.

[0034] Thirdly, the "one embodiment" or "embodiment" referred to herein means a specific feature, structure, or characteristic that is included in at least one implementation of the present application. Occurrences of the "in one embodiment" herein are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of other embodiments.

[0035] Embodiment 1

[0036] Referring to Figures 1-3 As shown in the figure, an industrial waste gas treatment device for preparing salicylic acid comprises a container 1.

[0037] Further comprising a neutralizing liquid adding pipeline 2, which extends into the inner cavity of the container 1 from the top of the container 1.

[0038] The bottom of the container 1 is provided with a water storage layer, which is connected with a waste water discharge pipeline 3.

[0039] The neutralizing liquid adding pipeline 2 is provided with a water outlet, and a downwardly tapered nozzle 2 with a spray opening is arranged at the water outlet.

[0040] A nickel-platinum metal mesh catalytic layer 4 is arranged in the container 1, which is arranged below the tapered nozzle 2 and above the water storage layer.

[0041] A disc structure called a gas combing disc 5 is arranged in the container 1, which is arranged below the metal mesh catalytic layer and is provided with through holes for waste gas to pass through.

[0042] At least two layers of gas combing discs 5 are arranged in the container 1, the lowermost gas combing disc 5 is arranged in the water storage layer, and the uppermost gas combing disc 5 is arranged above the water storage layer.

[0043] Further comprising a waste gas inlet pipeline 6 extending into the container 1, which is provided with a gas outlet, and the gas outlet extends downwardly into the water storage layer and is arranged below the lowermost gas combing disc 5.

[0044] Further comprising a gas outlet pipeline 7 arranged at the top of the container 1.

[0045] First, by setting the neutralizing liquid adding pipeline 2, adding neutralizing liquid (alkaline and oxidizing agent mixed solution) to the container 1, and atomizing and spraying out through the conical nozzle 2, the acidic and organic substances in the industrial salicylic acid waste gas can be neutralized, and the nickel-platinum metal mesh catalytic layer 4 can accelerate catalysis to prevent waste gas pollution and harm to human body; secondly, by setting the gas combing disc 5, at least two layers of gas combing discs 5 make the waste gas uniformly distributed in the container 1, so that the waste gas is uniformly mixed with the atomized neutralizing liquid, and the treatment effect of the waste gas is improved; finally, by setting the gas outlet of the waste gas inlet pipeline 6 in the water storage layer at the bottom of the container 1 and spraying the gas downward, the waste gas can be preliminarily passed through the water to reduce the temperature of the waste gas and dissolve part of the solid particles, and the lowermost gas combing disc 5 is arranged in the water storage layer to further prevent the waste gas from directly rushing to the nickel-platinum metal mesh catalytic layer 4, thereby ensuring the service life of the nickel-platinum metal mesh catalytic layer 4 and the conical nozzle 2. Thus, the service life of the waste gas treatment equipment is ensured while the waste gas is efficiently purified.

[0046] The conical nozzle 2 is a nozzle, and the design purpose is to disperse the liquid into a conical spray.

[0047] The gas combing disc 5 is made of ceramic disc or metal disc with high temperature resistance, which can withstand the high temperature of the waste gas, and the neutralizing liquid falling from above can fall on the gas combing disc 5 to cool the waste gas, prevent the waste gas from directly rushing to the nickel-platinum metal mesh catalytic layer 4 or the conical nozzle 2 of the container 1, and affect their service life, thereby prolonging the service life of the waste gas treatment equipment for industrial salicylic acid preparation.

[0048] The through holes on the adjacent gas combing discs 5 are arranged in a staggered manner; the staggered arrangement of the through holes on the adjacent gas combing discs 5 disrupts the waste gas smoke flow, making the waste gas more evenly upward, and the waste gas purification effect is better.

[0049] The gas outlet of the waste gas inlet pipeline 6 is arranged at the center position of the gas combing disc 5; the waste gas is evenly dispersed to the surrounding, ensuring uniform distribution of the waste gas, and the waste gas purification effect is better.

[0050] The through holes arranged on the gas combing disc 5 are arranged in a gradually increasing diameter from the center to the edge; the waste gas is more evenly upward.

[0051] In use, the neutralizing liquid adding pipeline 2 adds neutralizing liquid to the container 1, and atomizes and sprays out through the conical nozzle 2 to form a conical spray falling on the nickel-platinum metal mesh catalytic layer 4, and then drops on the two layers of gas combing discs 5 through the nickel-platinum metal mesh catalytic layer 4, and finally accumulates in the water storage layer and overflows the lowermost gas combing disc 5;

[0052] The waste gas enters the water storage layer at the bottom of the container 1 through the waste gas inlet pipeline 6, and the waste gas is first preliminarily passed through water from the center of the lowermost gas combing disc 5 downwardly, so as to reduce the waste gas temperature and dissolve part of solid particles; the waste gas is uniformly distributed in the container 1 through the waste gas combing disc 5, the nickel-platinum metal mesh catalytic layer 4 can accelerate the catalytic reaction and neutralize the waste gas, the conical nozzle 2 atomizes and sprays the conical mist, which further makes the remaining waste gas react with the neutralizing agent to neutralize, so that the waste gas is uniformly mixed with the atomized neutralizing liquid, the treatment effect of the waste gas is improved, the neutralizing liquid falling from the top can fall on the gas combing disc 5 to cool the waste gas, and the service life of the nickel-platinum metal mesh catalytic layer 4 or the conical nozzle 2 is prevented from being affected by the waste gas directly rushing to the nickel-platinum metal mesh catalytic layer 4 or the conical nozzle 2 of the container 1, so that the service life of the industrial waste gas treatment equipment for preparing salicylic acid is prolonged.

[0053] Embodiment 2

[0054] Reference Figure 1 And Figure 2 As the second embodiment of the utility model, the embodiment is based on the previous embodiment.

[0055] At least three ultrasonic generators 8 are arranged above the uppermost gas combing disc 5, and the ultrasonic wave emission direction of the ultrasonic generator 8 is towards the nickel-platinum metal mesh catalytic layer 4 upwards; the mass transfer process can be strengthened through the ultrasonic generator 8, the cavitation effect generated by the ultrasonic wave can accelerate the contact between the neutralizing liquid and the substances in the waste gas, break the gas-liquid interface resistance, and improve the reaction speed. Uniformly disperse the reactants, the ultrasonic vibration promotes the formation of micron-sized bubbles in the neutralizing liquid and breaks them, avoids local concentration being too high or precipitation, and ensures the uniformity of the neutralization reaction.

[0056] A float switch is arranged at the drainage port of the waste water discharge pipeline 3, and the liquid level in the water storage layer is higher than the drainage port of the waste water discharge pipeline 3 to open the float switch; the float switch controls the opening and closing of the drainage port of the waste water discharge pipeline 3 to prevent the waste gas from being discharged along the waste water discharge pipeline 3.

[0057] The container 1 has an upper end cover, the gas outlet pipeline 7 is arranged on the upper end cover, and the neutralizing liquid adding pipeline 2 penetrates through the upper end cover and extends into the container 1; a microwave lamp 9 is arranged below the upper end cover and irradiates the nickel-platinum metal mesh catalytic layer 4 from above; the nickel in the nickel-platinum metal mesh belongs to ferromagnetic metal, under the action of microwave (the frequency is usually 300MHz-300GHz), the free electrons on the surface of the metal are excited by the electromagnetic field to produce high-frequency oscillation, local hot spots or plasma are formed, the reaction activation energy is significantly reduced, and the reaction between the waste gas and the neutralizing liquid is catalyzed and neutralized.

[0058] The upper end cover inner wall and the nickel-platinum metal mesh catalytic layer 4 form a space called a gas chamber, and the microwave lamp 9 is arranged in the gas chamber; a circulating fan 10 is also arranged in the gas chamber, and the blowing port of the circulating fan 10 faces the nickel-platinum metal mesh catalytic layer 4; the circulating fan 10 can further help the mixing of the neutralizing liquid and the waste gas, and improve the reaction speed and reaction effect of the waste gas.

[0059] A water blocking cover 21 is arranged above the conical nozzle 2, and the water blocking cover 21 is fixed to the sewage inlet pipeline; a resonance film called a water blocking resonance film is arranged in the water blocking cover 21, and part of the water blocking resonance film is connected to the side of the conical nozzle 2; the water blocking cover 21 can improve the coverage and spray quality of the spraying, improve the uniformity of the water mist sprayed by the conical nozzle 2, and facilitate the full contact of the sprayed neutralizing agent water mist with the waste gas. The water blocking resonance film prevents the conical nozzle 2 from being blocked, and helps the preliminary atomization of the sewage when it is sprayed.

[0060] A reflecting cover 23 for reflecting water is further arranged below the water blocking cover 21, and a through hole is arranged in the middle of the reflecting cover 23; at least two reflecting covers 23 are arranged in a vertical arrangement, and the through hole of the lower reflecting cover 23 is smaller than the through hole of the upper reflecting cover 23; another resonance film called a reflecting resonance film is arranged in the lower part of the reflecting cover 23, and the reflecting resonance film is attached to the lower end of the reflecting cover 23; the reflecting cover 23 reflects the conical water mist sprayed by the conical nozzle 2 into a multi-layer tower-shaped water mist structure, further optimizes the contact effect of the waste gas and the neutralizing liquid, and ensures that the waste gas neutralization effect is more complete.

[0061] In use, when the conical nozzle 2 sprays the neutralizing liquid to neutralize the waste gas, the ultrasonic vibration causes the formation of micron-sized bubbles in the neutralizing liquid and their rupture, avoids local over-concentration or precipitation, and ensures the uniformity of the neutralization reaction; the cavitation effect generated by the ultrasonic wave can accelerate the contact of the neutralizing liquid and the substances in the waste gas, break the gas-liquid interface resistance, the microwave lamp 9 shines on the nickel-platinum metal mesh catalytic layer 4 from above, thereby improving the reaction speed, the float switch controls the opening and closing of the drainage port of the wastewater discharge pipeline 3 to prevent the waste gas from being discharged along the wastewater discharge pipeline 3, the water blocking cover 21 can improve the coverage and spray quality of the spraying, the water blocking cover 21 can improve the coverage and spray quality of the spraying, the uniformity of the water mist sprayed by the conical nozzle 2 is improved, and the reflecting cover 23 reflects the conical water mist sprayed by the conical nozzle 2 into a multi-layer tower-shaped water mist structure, further optimizes the contact effect of the waste gas and the neutralizing liquid, and ensures that the waste gas neutralization effect is more complete.

[0062] Furthermore, to provide a concise description of exemplary implementations, not all features of actual implementations can be described, nor can those features that are not pertinent to the best mode of carrying out the present application currently under consideration, or those features that are not pertinent to the implementation of the present application.

[0063] It is to be understood that the development making of the numerous implementation decisions during the development of any embodiment is a design choice. These development efforts might be complex and time consuming, but can nevertheless be a routine recourse for those of ordinary skill in the art having the benefit of this disclosure.

[0064] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the present application, and all modifications and equivalent replacements should be included in the scope of the claims of the present application.

Claims

1. A waste gas treatment device for industrial salicylic acid preparation, comprising a container, characterized in that: It also includes a neutralizing liquid addition pipe that extends from the top of the container into the inner cavity of the container; The container has a water storage layer at the bottom, and the water storage layer is connected to a wastewater discharge pipe. The neutralizing liquid addition pipeline has a water outlet, and a downward-facing conical nozzle is installed at the water outlet. The container is provided with a nickel-platinum metal mesh catalyst layer, which is located below the conical nozzle and above the water storage layer. The container is provided with a disc structure called a gas combing disc, and the gas combing disc is provided with through holes for the exhaust gas to pass through. The gas combing disc is located below the metal mesh catalyst layer. The container is provided with at least two layers of air combing discs, with the bottom layer of air combing discs located in the water storage layer and the top layer of air combing discs located above the water storage layer. It also includes an exhaust gas inlet pipe that extends into the container, the exhaust gas inlet pipe having an outlet that discharges air downwards and extends into the water storage layer, the outlet being located below the lowest combing disc; It also includes an exhaust pipe, which is located at the top of the container.

2. The waste gas treatment equipment for industrial salicylic acid preparation according to claim 1, characterized in that: The perforations on adjacent comb discs are arranged in an alternating pattern.

3. The waste gas treatment equipment for industrial salicylic acid preparation according to claim 1, characterized in that: The outlet of the exhaust gas inlet pipe is located at the center of the combing disc.

4. The waste gas treatment equipment for industrial salicylic acid preparation according to claim 1, characterized in that: The perforations on the air combing disc are arranged in a pattern where the diameter gradually increases from the center to the edge.

5. The waste gas treatment equipment for industrial salicylic acid preparation according to claim 1, characterized in that: At least three ultrasonic generators are arranged above the topmost air-combing disc, with the ultrasonic waves emitted by the generators directed toward the nickel-platinum metal mesh catalyst layer above.

6. The waste gas treatment equipment for industrial salicylic acid preparation according to claim 1, characterized in that: A float switch is installed at the drain outlet of the wastewater discharge pipe. The float switch is activated when the liquid level in the water storage layer is higher than the drain outlet of the wastewater discharge pipe.

7. The waste gas treatment equipment for industrial salicylic acid preparation according to claim 1, characterized in that: The container has an upper cover, the gas outlet pipe is disposed on the upper cover, and the neutralizing liquid addition pipe extends into the container through the upper cover; A microwave lamp is installed below the upper cover, and the microwave lamp shines on the nickel-platinum metal mesh catalyst layer from above.

8. The waste gas treatment equipment for industrial salicylic acid preparation according to claim 7, characterized in that: The inner wall of the upper end cap and the nickel-platinum metal mesh catalyst layer form a space called a gas chamber, and the microwave lamp is disposed in the gas chamber; The gas chamber is also equipped with a circulating fan, and the air outlet of the circulating fan is directed toward the nickel-platinum metal mesh catalyst layer.

9. The waste gas treatment equipment for industrial salicylic acid preparation according to claim 1, characterized in that: A water baffle is provided above the conical nozzle, and the water baffle is fixed to the sewage inlet pipe; The water-blocking cover is provided with a resonant membrane, called a water-blocking resonant membrane, and part of the water-blocking resonant membrane is connected to the periphery of the conical nozzle.

10. The waste gas treatment equipment for industrial salicylic acid preparation according to claim 9, characterized in that: Below the water-blocking cover, a water-reflecting cover is also connected, and the reflective cover has an opening in the middle. At least two reflectors are arranged vertically, with the opening of the lower reflector being smaller than that of the upper reflector. Another resonant membrane, called a reflective resonant membrane, is disposed at the lower part of the reflector, and the reflective resonant membrane is attached to the lower end of the reflector.

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