An organic waste gas treatment device and method applied to 2-bromonaphthalene production

Abstract

The application discloses a kind of organic waste gas treatment device and method applied to 2-bromonaphthalene production, comprising: mounting frame, the condensing piece is arranged on the mounting frame, the water washing piece is arranged on the mounting frame, the alkali washing piece and the suction accessory are also arranged on the mounting frame;In the present application, by water washing piece and alkali washing piece, two-stage series washing process can be used to remove corrosive and toxic components such as hydrogen bromide and bromine vapor from waste gas step by step, and the purification efficiency is stable and controllable. The two-stage combination can avoid the problem of easy scaling and plugging of single-stage alkali washing, while having reliable anti-backflow capability, ensuring the safe operation of the front-end equipment, the overall structure is simple and easy to maintain, which can provide qualified air supply conditions for the rear-end adsorption unit, avoiding equipment corrosion and filler poisoning failure.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment equipment technology, specifically to an organic waste gas treatment device and method applied to the production of 2-bromonaphthalene. Background Technology

[0002] 2-Bromonaphthalene is a widely used intermediate in fine chemical halogenated aromatic hydrocarbons, playing an important role in pharmaceutical synthesis, dye preparation, and the production of organic functional materials. Its industrial production is mostly achieved through the bromination reaction of naphthalene-based raw materials. The reaction and post-processing steps continuously generate organic waste gas containing hydrogen bromide, bromine vapor, volatile components of 2-bromonaphthalene, and organic solvents. This type of waste gas is corrosive, toxic, and volatile, and requires graded purification through specialized organic waste gas treatment processes. While removing pollutants to achieve emission standards, it also takes into account the recovery of production materials and the protection of equipment operation, meeting the environmental control and safe production requirements of chemical production.

[0003] Existing scrubbing solutions for organic waste gas from 2-bromonaphthalene production mostly employ single-stage alkaline scrubbing to remove acidic and bromine-based pollutants. During long-term operation, these solutions are prone to scaling and clogging due to the accumulation of salts generated in the reaction. The purification efficiency fluctuates with changes in the inlet gas concentration, and the backflow prevention capability is weak, posing a risk of damage to upstream equipment due to absorbent backflow. Furthermore, single-stage scrubbing has limited removal depth for corrosive components, making it difficult to fully guarantee the cleanliness of the downstream inlet gas. This can easily lead to packing poisoning and equipment corrosion in the adsorption unit, increasing system maintenance costs to some extent and hindering the long-term stable operation of the treatment device. Summary of the Invention

[0004] The purpose of this invention is to address the problems of existing washing and treatment schemes for organic waste gas from 2-bromonaphthalene production, which mostly employ single-stage alkaline washing to remove acidic and bromine-based pollutants. These methods are prone to scaling and clogging due to the accumulation of salts generated during long-term operation, resulting in fluctuating purification efficiency with variations in inlet gas concentration. Furthermore, they have weak backflow prevention capabilities, posing a risk of absorbent backflow damaging upstream equipment. Additionally, single-stage washing has limited removal depth for corrosive components, making it difficult to fully guarantee the cleanliness of the downstream inlet gas, potentially leading to filler poisoning and equipment corrosion in the adsorption unit. This increases system maintenance costs and hinders the long-term stable operation of the treatment device. Therefore, this invention provides an organic waste gas treatment device and method for 2-bromonaphthalene production.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an organic waste gas treatment device and method applied to the production of bromonaphthalene, comprising: a mounting frame, wherein a condenser is provided on the mounting frame, a water washing component is provided on the mounting frame, and an alkaline washing component and an adsorption component are also provided on the mounting frame;

[0006] The water washing component includes a water tank fixedly connected to the mounting bracket. An inlet pipe and an outlet pipe are connected through the side of the water tank. The inlet pipe and outlet pipe are symmetrically distributed on both sides of the water tank. An exhaust pipe is connected through the top of the water tank. The top of the water tank is inverted conical. An air inlet pipe is connected through one end of the condenser. A diverter pipe is connected through one end of the air inlet pipe. A diverter pipe is connected through one end of the diverter pipe. Multiple diverter pipes are provided in the second set, evenly distributed at the bottom of the water tank. A diverter pipe is connected through the top of the second diverter pipe. The top of the third diverter pipe penetrates the bottom of the water tank and is flush with the bottom of the water tank. Multiple diverter pipes are provided on each second diverter pipe. The third air inlet pipe is n-shaped, and the top of the third air inlet pipe is higher than the highest water level in the water tank.

[0007] As a further embodiment of the present invention: the water washing component, the alkaline washing component, and the adsorption component are arranged in a vertical line from bottom to top and are connected in sequence; the condensing component and the water washing component are arranged in a horizontal line and are connected to each other.

[0008] As a further embodiment of the present invention: the condensing component includes a condensing box fixedly connected to the mounting bracket, an air inlet pipe and an air outlet pipe are connected through the side end of the condensing box, the air inlet pipe and the air outlet pipe are symmetrically distributed on both sides of the condensing box, the air outlet pipe is located on the side close to the washing component, and an air inlet pipe is connected through one end of the air outlet pipe.

[0009] As a further embodiment of the present invention: the condenser is inclined, a recovery pipe is connected through to the lower side of the condenser, a condenser plate is provided through the upper side of the condenser, the condenser plate is arranged parallel to the condenser, and multiple sets of condenser plates are provided and evenly distributed along the height direction of the condenser.

[0010] As a further embodiment of the present invention: a heat-conducting plate is fixedly connected to one side of the condenser plate through the condenser box; multiple sets of condenser plates are fixedly connected to one set of heat-conducting plates; a closed cover is fixedly connected to the side of the heat-conducting plate away from the condenser box; the closed cover has an n-shaped cross-section; the opening of the closed cover faces the heat-conducting plate; an air inlet pipe II and an air outlet pipe II are connected through the closed cover; the air inlet pipe II and the air outlet pipe II are symmetrically distributed on both sides of the closed cover; the air inlet pipe II and the air outlet pipe II are respectively connected to the air inlet end and the air outlet end of the air cooler.

[0011] As a further embodiment of the present invention: the alkaline washing part and the water washing part have the same structure and the same size. One end of the exhaust pipe in the water washing part is connected to a connecting pipe, and the connecting pipe is connected to the air inlet pipe in the alkaline washing part. The water tank in the water washing part contains clean water, and the water tank in the alkaline washing part contains alkaline water.

[0012] As a further embodiment of the present invention: the adsorption component includes an adsorption box fixedly connected to the mounting frame, the upper end of the adsorption box is inverted conical, the lower end of the adsorption box is conical, an air outlet pipe three is connected through the top end of the adsorption box, an air inlet pipe four is connected through the bottom end of the adsorption box, a resin adsorption bed is fixedly connected inside the adsorption box, and the air inlet pipe four is connected to the exhaust pipe in the alkaline washing component.

[0013] A method for treating organic waste gas from bromonaphthalene production includes the following steps:

[0014] S1. First, complete the preliminary preparation of the equipment. Fill the water tank of the water washing part with clean water to the set liquid level, and fill the water tank of the alkaline washing part with the prepared alkaline solution. Connect the air cooler to the air inlet pipe 2 and air outlet pipe 2 of the closed cover. After confirming that the pipeline is sealed, start the exhaust fan so that the production waste gas flows into the air inlet pipe 1 of the condenser. After starting the air cooler, the cold air transfers the cooling capacity to multiple condenser plates through the heat conduction plate. When the waste gas flows in the inclined condenser box, the high boiling point components condense into liquid when they encounter the cold. They converge along the box to the lower part and are recovered and reused through the recovery pipe. The pre-treated waste gas is discharged from the air outlet pipe 1, completing the condensation recovery treatment.

[0015] S2. After that, the condensed exhaust gas is sent into the water washing unit through the air inlet pipe three. It is then introduced into the water tank from the bottom below the surface of the clean water through the first, second and third split pipes. The exhaust gas rises in the form of fine bubbles, initially removing hydrogen bromide and some bromine vapor. Subsequently, the exhaust gas is sent into the alkaline washing unit and introduced into the alkaline solution in the same bottom air distribution method to completely neutralize the remaining acidic components and absorb the residual elemental bromine, completing the two-stage washing and purification to remove all corrosive and bromine-based pollutants.

[0016] S3. Finally, the alkali-washed and purified exhaust gas enters the adsorption unit through the inlet pipe four. After being evenly diffused in the adsorption box, it flows from bottom to top through the resin adsorption bed. The residual organic VOCs components are intercepted by the adsorption packing, achieving deep purification. The clean exhaust gas is discharged through the outlet pipe three and connected to the high-altitude exhaust stack for emission in compliance with standards. During operation, the exhaust gas concentration is monitored regularly. When the resin adsorption bed is saturated, it is replaced or desorbed and regenerated in a timely manner to ensure the continuous and stable operation of the device.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The present invention achieves stable low-temperature condensation with low energy consumption through the condenser, and efficiently recovers high-boiling-point bromonaphthalene and production solvents from the waste gas. This reduces material loss and operating costs, and significantly reduces the processing load of subsequent washing and adsorption sections. The condensate can be automatically collected and recovered without additional power transportation. The overall structure is compact, corrosion-resistant and adaptable, and can be well adapted to the pretreatment conditions of bromine-containing acidic waste gas, reducing the burden and increasing the efficiency of the entire treatment device.

[0019] 2. In this invention, a two-stage series washing process using water washing and alkaline washing components can remove corrosive and toxic components such as hydrogen bromide and bromine vapor from waste gas in stages. The purification efficiency is stable and controllable. The two-stage combination avoids the problem of scaling and clogging that is easy to occur with single-stage alkaline washing. At the same time, it has reliable backflow prevention capability to ensure the safe operation of the front-end equipment. The overall structure is simple and easy to maintain, and it can provide qualified air intake conditions for the back-end adsorption unit, avoiding equipment corrosion and packing poisoning failure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the condenser component in this invention;

[0022] Figure 3 In this invention Figure 2 A schematic diagram of the structure at point A;

[0023] Figure 4 This is a cross-sectional view of the condenser box in this invention;

[0024] Figure 5 This is a schematic diagram of the structure of the water washing component in this invention;

[0025] Figure 6 This is a cross-sectional view of the water tank in this invention;

[0026] Figure 7 This is a schematic diagram of the adsorption element in this invention.

[0027] In the diagram: 1. Mounting frame; 2. Condensing component; 21. Condensing box; 22. Inlet pipe 1; 23. Outlet pipe 1; 24. Recovery pipe; 25. Condensing plate; 26. Heat-conducting plate; 27. Sealing cover; 28. Inlet pipe 2; 29. ​​Outlet pipe 2; 3. Washing component; 31. Water tank; 32. Water inlet pipe; 33. Water outlet pipe; 34. Exhaust pipe; 35. Inlet pipe 3; 36. Diverter pipe 1; 37. Diverter pipe 2; 38. Diverter pipe 3; 4. Alkali washing component; 5. Adsorption component; 51. Adsorption box; 52. Inlet pipe 4; 53. Outlet pipe 3; 54. Resin adsorption bed. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0030] Reference Figure 1 In this embodiment of the invention, an organic waste gas treatment device and method for the production of 2-bromonaphthalene includes: a mounting frame 1, a condenser 2 and a water washing component 3 on the mounting frame 1, the condenser 2 and the water washing component 3 being connected, and an alkaline washing component 4 and an adsorption component 5 also being provided on the mounting frame 1. The water washing component 3, the alkaline washing component 4 and the adsorption component 5 are arranged in a vertical line from bottom to top and are connected in sequence. The condenser 2 and the water washing component 3 are arranged in a horizontal line.

[0031] Reference Figures 2 to 4 The condenser 2 includes a condenser box 21 fixedly connected to the mounting bracket 1. An inlet pipe 22 and an outlet pipe 23 are connected through the side of the condenser box 21. The inlet pipe 22 and outlet pipe 23 are symmetrically distributed on both sides of the condenser box 21. The outlet pipe 23 is located on the side closer to the washing component 3. The condenser box 21 is inclined. A recovery pipe 24 is connected through the lower part of the condenser box 21. A condenser plate 25 is installed through the condenser box 21 on the higher part of the condenser box 21. The condenser plate 25 is parallel to the condenser box 21, and multiple sets of condenser plates 25 are provided along the height direction of the condenser box 21. The condenser plates 25 are evenly distributed and are fixedly connected to a heat-conducting plate 26 on one side of the condenser box 21. Multiple sets of condenser plates 25 are fixedly connected to a set of heat-conducting plates 26. A closed cover 27 is fixedly connected to the side of the heat-conducting plate 26 away from the condenser box 21. The closed cover 27 has an n-shaped cross section and the opening of the closed cover 27 faces the side of the heat-conducting plate 26. An air inlet pipe 28 and an air outlet pipe 29 are connected through the closed cover 27. The air inlet pipe 28 and the air outlet pipe 29 are symmetrically distributed on both sides of the closed cover 27. The air inlet pipe 28 and the air outlet pipe 29 are respectively connected to the air inlet end and the air outlet end of the air cooler.

[0032] The above solution involves setting up an inclined condenser box 21 for the condenser component 2, along with multiple sets of condenser plates 25 evenly distributed along the height of the box. This effectively extends the flow path of the exhaust gas within the box, increases the contact area between the exhaust gas and the condenser heat exchange surface, and ensures that high-boiling-point organic components are fully condensed and liquefied. An independent air-cooled chamber is formed by the heat-conducting plate 26 and the n-shaped enclosed cover 27, which, together with the air cooler, achieves uniform and continuous heat exchange. At the same time, the inclined structure allows the condensate to naturally converge at the lower part of the box and be centrally discharged and recovered through the recovery pipe 24, thereby improving the solvent and material recovery rate and significantly reducing the exhaust gas load of subsequent processes.

[0033] Reference Figures 5 to 6 The washing component 3 includes a water tank 31 fixedly connected to the mounting bracket 1. An inlet pipe 32 and an outlet pipe 33 are connected through the side of the water tank 31. The inlet pipe 32 and outlet pipe 33 are symmetrically distributed on both sides of the water tank 31. An exhaust pipe 34 is connected through the top of the water tank 31. The top of the water tank 31 is inverted conical. One end of the exhaust pipe 23 is connected to an inlet pipe 35. One end of the inlet pipe 35 is connected to a diverter pipe 36. The side end of the diverter pipe 36 is connected to a diverter pipe 37. Multiple diverter pipes 37 are evenly distributed at the bottom of the water tank 31. The top of the diverter pipe 37... A diversion pipe 38 is connected to the end of the water tank 31. The top end of the diversion pipe 38 passes through the bottom end of the water tank 31 and is flush with the bottom end of the water tank 31. Multiple diversion pipes 38 are provided on each diversion pipe 2 37. The air inlet pipe 35 is n-shaped and the top end of the air inlet pipe 35 is higher than the highest water level in the water tank 31. The alkaline washing component 4 and the water washing component 3 have the same structure and the same size. One end of the exhaust pipe 34 in the water washing component 3 is connected to a connecting pipe. The connecting pipe is connected to the air inlet pipe 35 in the alkaline washing component 4. The water tank 31 in the water washing component 3 contains clean water, and the water tank 31 in the alkaline washing component 4 contains alkaline water.

[0034] The above scheme employs a multi-channel bottom distribution structure with three branch pipes (36, 37, and 38) for the water washing component 3 and the alkaline washing component 4. This allows the waste gas to be evenly dispersed and introduced below the liquid surface, forming fine bubbles that fully contact the absorbent liquid, significantly improving the absorption and purification efficiency of acidic gases and bromine vapors. The high-positioning of the n-shaped air inlet pipe 35 effectively prevents the absorbent liquid from flowing back to the front-end equipment. Combined with the inverted cone-shaped exhaust pipe 34 at the top, it reduces air resistance. The two-stage water washing and alkaline washing are sequentially connected, which can remove acidic components and bromine pollutants from the waste gas step by step, ensuring the safe operation of the downstream treatment unit.

[0035] Reference Figure 7The adsorption component 5 includes an adsorption box 51 fixedly connected to the mounting frame 1. The upper end of the adsorption box 51 is inverted conical, and the lower end of the adsorption box 51 is conical. An exhaust pipe 3 53 is connected through the top end of the adsorption box 51, and an inlet pipe 4 52 is connected through the bottom end of the adsorption box 51. A resin adsorption bed 54 is fixedly connected inside the adsorption box 51. The inlet pipe 4 52 is connected to the exhaust pipe 34 in the alkaline washing component 4.

[0036] The above scheme adopts an adsorption box 51 structure with upper and lower conical shape and middle straight cylinder by using the adsorption element 5. This can guide the waste gas to diffuse evenly through the resin adsorption bed 54, avoid airflow deviation and adsorption dead angle, improve the adsorption and purification effect of organic waste gas, and the flow direction design of bottom inlet and top outlet can make the waste gas fully contact the adsorption packing from bottom to top, ensure that VOCs components are effectively intercepted, and achieve deep purification of tail gas to meet emission standards.

[0037] The working principle of this invention is as follows: When in use, first complete the preliminary preparation of the device, inject clean water into the water tank 31 of the water washing component 3 to the set liquid level, inject the prepared sodium hydroxide alkaline solution into the water tank 31 of the alkaline washing component 4 to the corresponding liquid level, connect the air outlet and air inlet of the air cooler to the air inlet pipe 28 and air outlet pipe 29 of the sealed cover 27 respectively, and after confirming that the pipeline of the entire device is airtight, start the waste gas collection system and the exhaust fan, so that the organic waste gas of the 2-bromonaphthalene production workshop continuously flows into the air inlet pipe 22 of the condenser component 2 under negative pressure;

[0038] After the air cooler is started, low-temperature cold air is sent into the independent chamber formed by the enclosed cover 27 and the heat-conducting plate 26 through the second air inlet pipe 28. During the horizontal flow of the cold air, the cooling capacity is evenly transferred to each set of condensing plates 25 through the heat-conducting plate 26, so that the interior of the condensing box 21 maintains a stable low-temperature environment. The cold air after heat exchange flows back to the air cooler for recirculation and refrigeration through the second air outlet pipe 29. The organic waste gas from production enters the inclined condensing box 21 through the first air inlet pipe 22 and flows along the channel between multiple sets of parallel condensing plates 25. The waste gas contains high boiling point... When the 2-bromonaphthalene, 2-naphthol, and alkane solvent components are cooled, they condense into liquid and adhere to the surface of the condenser plate 25 and the inner wall of the condenser box 21. Under the action of gravity, they flow along the inclined plate and box wall to the lower part of the box and finally collect and are discharged through the recovery pipe 24 and sent to the production system for recycling. After condensation pretreatment, most of the high-boiling-point organic components and recyclable solvents are removed, the waste gas load is greatly reduced, and the remaining low-concentration waste gas is discharged from the condenser box 21 through the outlet pipe 23, completing the first stage of condensation recovery treatment.

[0039] The exhaust gas after condensation treatment enters the inlet pipe 35 of the water washing component 3 via the outlet pipe 23. The airflow is transported to the diversion pipe 36 along the n-shaped inlet pipe 35. The high-level bend of the n-shaped structure keeps the top of the pipe above the highest liquid level of the water tank 31, preventing the clean water in the water tank 31 from flowing back to the front-end equipment when the negative pressure fluctuates. After entering the diversion pipe 36, the airflow is evenly distributed to the multi-component diversion pipe 2 37, and then transported to the corresponding multi-component diversion pipe 38, from which clean water is evenly introduced below the liquid level from the bottom of the water tank 31. The exhaust gas rises slowly in the clean water in the form of fine bubbles. During the process of full contact between gas and liquid, a large amount of hydrogen bromide and some bromine vapor in the exhaust gas dissolve in the clean water, achieving the initial removal of acidic components and some bromine-based pollutants. Fresh clean water can be added through the inlet pipe 32 during operation. Saturated wastewater is periodically discharged through the outlet pipe 33 and sent to the wastewater treatment system. The exhaust gas after water washing rises to the inverted cone space at the top of the water tank 31, decelerates to remove some droplets, and is discharged through the exhaust pipe 34 to the water washing component 3, completing the second stage of water washing purification treatment.

[0040] After washing, the exhaust gas is sent to the air inlet pipe 35 of the alkaline washing component 4 through the connecting pipe. The alkaline washing component 4 adopts the same bottom air distribution structure as the water washing component 3, so that the exhaust gas is evenly introduced below the surface of the alkaline solution. During the process of the exhaust gas rising in the alkaline solution, the remaining hydrogen bromide is completely neutralized by the alkaline solution, and the residual elemental bromine reacts with the alkaline solution and is fully absorbed. Some organic odors can also be initially degraded. After two-stage washing, the acidic components and bromine pollutants in the exhaust gas are basically completely removed, which not only avoids the damage of the downstream adsorption equipment by corrosive components, but also eliminates the risk of generating toxic brominated byproducts in subsequent treatment.

[0041] The exhaust gas purified by alkaline washing is sent to the inlet pipe 52 at the bottom of the adsorption unit 5 through a pipeline. After entering from the lower conical section of the adsorption box 51, the exhaust gas gradually diffuses to the entire cross section of the box and then flows evenly upward through the resin adsorption bed 54. The residual acetonitrile, trace amounts of 2-bromonaphthalene and naphthol and other organic VOCs components in the exhaust gas are selectively captured and intercepted by the adsorption packing during the flow through the resin adsorption bed 54, achieving deep purification of organic waste gas. The purified clean exhaust gas continues to rise and is collected through the upper inverted conical section of the adsorption box 51 before being discharged from the device through the top outlet pipe 53. Finally, it is connected to the high-altitude exhaust stack for emission in compliance with standards. During operation, the exhaust gas concentration can be monitored periodically. When the resin adsorption bed 54 is saturated, it should be replaced or desorbed and regenerated in a timely manner to ensure the continuous and stable operation of the device in compliance with standards.

[0042] The condenser 2 achieves stable low-temperature condensation with low energy consumption, efficiently recovering high-boiling-point 2-bromonaphthalene and production solvents from the waste gas. This reduces material loss and operating costs, and significantly lowers the processing load of subsequent washing and adsorption sections. The condensate can be automatically collected and recovered without additional power transportation. The overall structure is compact, corrosion-resistant, and adaptable, making it well-suited for pre-treatment of bromine-containing acidic waste gas. This reduces the burden on the entire treatment unit and increases its efficiency. The water washing unit 3 and the alkaline washing unit 4 employ a two-stage series washing process, which can remove corrosive and toxic components such as hydrogen bromide and bromine vapor from the waste gas in stages. The purification efficiency is stable and controllable. The two-stage combination avoids the problem of scaling and clogging that is common in single-stage alkaline washing. It also has reliable backflow prevention capabilities, ensuring the safe operation of the front-end equipment. The overall structure is simple and easy to maintain, providing qualified air intake conditions for the downstream adsorption unit and preventing equipment corrosion and packing poisoning failure.

[0043] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An organic waste gas treatment device for the production of 2-bromonaphthalene, comprising: The mounting frame (1) is characterized in that a condenser (2) is provided on the mounting frame (1), a water washing component (3) is provided on the mounting frame (1), and an alkaline washing component (4) and an adsorption component (5) are also provided on the mounting frame (1). The water washing component (3) includes a water tank (31) fixedly connected to the mounting bracket (1). A water inlet pipe (32) and a water outlet pipe (33) are connected through the side of the water tank (31). The water inlet pipe (32) and the water outlet pipe (33) are symmetrically distributed on both sides of the water tank (31). An exhaust pipe (34) is connected through the top of the water tank (31). The top of the water tank (31) is an inverted cone shape. One end of the condenser component (2) is connected through an air inlet pipe (35). One end of the air inlet pipe (35) is connected through a diverter pipe (36). Diverter pipe one (36) is connected to diverter pipe two (37) through the side end. There are multiple sets of diverter pipe two (37) evenly distributed at the bottom of water tank (31). Diverter pipe three (38) is connected to the top of diverter pipe two (37). The top of diverter pipe three (38) penetrates the bottom of water tank (31) and is flush with the bottom of the inside of water tank (31). Multiple sets of diverter pipe three (38) are provided on each set of diverter pipe two (37). The air inlet pipe three (35) is n-shaped and the top of the air inlet pipe three (35) is higher than the highest water level in water tank (31).

2. The organic waste gas treatment device for the production of 2-bromonaphthalene according to claim 1, characterized in that, The water washing component (3), the alkaline washing component (4), and the adsorption component (5) are arranged in a vertical line from bottom to top and are connected in sequence. The condensing component (2) and the water washing component (3) are arranged in a horizontal line and are connected to each other.

3. The organic waste gas treatment device for the production of 2-bromonaphthalene according to claim 2, characterized in that, The condenser (2) includes a condenser box (21) fixedly connected to the mounting bracket (1). The side end of the condenser box (21) is connected to an inlet pipe (22) and an outlet pipe (23). The inlet pipe (22) and the outlet pipe (23) are symmetrically distributed on both sides of the condenser box (21). The outlet pipe (23) is located near the water washing component (3). One end of the outlet pipe (23) is connected to an inlet pipe (35).

4. The organic waste gas treatment device for the production of 2-bromonaphthalene according to claim 3, characterized in that, The condenser box (21) is inclined, and a recovery pipe (24) is connected to the lower side of the condenser box (21). A condenser plate (25) is installed through the upper side of the condenser box (21). The condenser plate (25) is arranged parallel to the condenser box (21), and multiple sets of condenser plates (25) are evenly distributed along the height direction of the condenser box (21).

5. The organic waste gas treatment device for the production of 2-bromonaphthalene according to claim 4, characterized in that, The condenser plate (25) is fixedly connected to a heat-conducting plate (26) through one side of the condenser box (21). Multiple sets of condenser plates (25) are fixedly connected to a set of heat-conducting plates (26). A closed cover (27) is fixedly connected to the side of the heat-conducting plate (26) away from the condenser box (21). The closed cover (27) has an n-shaped cross section. The opening of the closed cover (27) faces the side of the heat-conducting plate (26). An air inlet pipe (28) and an air outlet pipe (29) are connected through the closed cover (27). The air inlet pipe (28) and the air outlet pipe (29) are symmetrically distributed on both sides of the closed cover (27). The air inlet pipe (28) and the air outlet pipe (29) are respectively connected to the air inlet end and the air outlet end of the air cooler.

6. The organic waste gas treatment device for the production of 2-bromonaphthalene according to claim 5, characterized in that, The alkaline washing component (4) and the water washing component (3) have the same structure and the same size. One end of the exhaust pipe (34) in the water washing component (3) is connected to a connecting pipe. The connecting pipe is connected to the air inlet pipe (35) in the alkaline washing component (4). The water tank (31) in the water washing component (3) contains clean water, and the water tank (31) in the alkaline washing component (4) contains alkaline water.

7. An organic waste gas treatment device for the production of 2-bromonaphthalene according to claim 6, characterized in that, The adsorption component (5) includes an adsorption box (51) fixedly connected to the mounting frame (1). The upper end of the adsorption box (51) is inverted cone-shaped, and the lower end of the adsorption box (51) is cone-shaped. An exhaust pipe (53) is connected through the top of the adsorption box (51), and an inlet pipe (52) is connected through the bottom of the adsorption box (51). A resin adsorption bed (54) is fixedly connected inside the adsorption box (51), and the inlet pipe (52) is connected to the exhaust pipe (34) in the alkaline washing component (4).

8. A method for treating organic waste gas from the production of 2-bromonaphthalene according to any one of claims 1-7, characterized in that, Includes the following steps: S1. First, complete the preliminary preparation of the device, inject clean water into the water tank (31) of the water washing part (3) to the set liquid level, inject the prepared alkaline solution into the water tank (31) of the alkaline washing part (4), connect the air cooler to the air inlet pipe (28) and the air outlet pipe (29) of the closed cover (27), and start the induced draft equipment after confirming that the pipeline is sealed and connected, so that the production waste gas flows into the air inlet pipe (22) of the condenser (2); after starting the air cooler, the cold air transfers the cooling capacity to multiple condenser plates (25) through the heat conduction plate (26). When the waste gas flows in the inclined condenser box (21), the high boiling point components condense into liquid when they encounter the condenser, and converge along the box to the low place and are recycled through the recovery pipe (24). The pre-treated waste gas is discharged from the air outlet pipe (23) to complete the condensation and recovery treatment. S2. After that, the condensed exhaust gas is sent into the water washing component (3) through the third inlet pipe (35), and then through the first branch pipe (36), the second branch pipe (37) and the third branch pipe (38) from the bottom of the water tank (31) below the surface of the clean water. The exhaust gas rises in the form of fine bubbles, and hydrogen bromide and some bromine vapor are initially removed. Then the exhaust gas is sent into the alkaline washing component (4), and is introduced into the alkaline solution in the same bottom air distribution method to completely neutralize the remaining acidic components and absorb the residual bromine element, thus completing the two-stage washing and purification and removing all corrosive and bromine-based pollutants. S3. Finally, the alkali-washed and purified exhaust gas enters the adsorption unit (5) through the inlet pipe four (52), diffuses evenly in the adsorption box (51), and flows from bottom to top through the resin adsorption bed (54). The residual organic VOCs components are intercepted by the adsorption packing, achieving deep purification. The clean exhaust gas is discharged through the outlet pipe three (53) and connected to the high-altitude exhaust stack for emission in compliance with standards. During operation, the exhaust gas concentration is checked regularly, and the resin adsorption bed (54) is replaced or desorbed and regenerated in time after adsorption saturation to ensure the continuous and stable operation of the device.

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