A hydrogen peroxide tail gas adsorption device and adsorption system

Abstract

This invention provides an adsorption device for hydrogen peroxide oxidation tail gas, comprising an adsorption tank, an inner filter cartridge, an outer filter cartridge, an adsorption chamber, several air inlets, an adsorption resin layer, an inlet pipe, and an outlet pipe; both the inner and outer filter cartridges are located inside the adsorption tank. This invention optimizes the traditional "flat-lay" structure into a "sleeve-type" coaxial double-layer filter cartridge structure, improving the contact efficiency between the tail gas and the resin, preventing the resin from being blown away or worn, extending its service life, and simplifying the filling process. The elimination of quartz sand filler also simplifies the filling process. The system adopts a "five-in-one-out" operating mode, enabling multiple adsorption tanks to operate in rotation. Combined with steam regeneration, nitrogen purging, and spray cooling processes, it achieves efficient resin regeneration and reuse, significantly reducing operating energy consumption and material replacement frequency. The adsorption system operates stably, has a compact structure, and can continuously and efficiently remove aromatic organic pollutants from the oxidation tail gas, balancing operational economy and environmental friendliness.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and in particular to a peroxide oxidation tail gas adsorption device and adsorption system. Background Technology

[0002] Hydrogen peroxide is an important chemical raw material, and the treatment of oxidation tail gas emissions is an indispensable part of its production process. Oxidation tail gas often contains a large amount of aromatic organic compounds, such as benzene and toluene. If it is discharged directly without treatment, it will not only waste resources but may also cause environmental pollution.

[0003] Currently, carbon fiber adsorption felt is widely used in the industry for the adsorption and purification of oxidation exhaust gases. Although this material has a certain adsorption capacity, its inherent defects gradually become apparent as the process operation time increases and the exhaust gas flow rate and concentration increase: First, its adsorption capacity is limited, making it difficult to effectively meet the exhaust gas treatment needs under high loads; second, carbon fiber adsorption felt is hydrophilic, easily absorbs moisture and deteriorates, its adsorption performance is unstable, and there is a risk of microbial growth; third, its service life is short, and frequent replacement will lead to increased maintenance costs and a burden on solid waste treatment; fourth, in the traditional "flat-lay" adsorption structure, the resin is easily disturbed by airflow, causing the adsorption material to break, leak, or even become clogged.

[0004] Furthermore, existing "flat-lay" resin column structures typically include a filter cartridge and quartz sand packing at the bottom, with a T-shaped wire mesh structure at the top. This arrangement can easily cause frictional breakage between the adsorption resin and the quartz sand under high gas velocities, severely affecting adsorption performance and material lifespan. Utility Model Content

[0005] Based on the above background, the purpose of this utility model is to provide a hydrogen peroxide tail gas adsorption device and adsorption system that has low consumption, long life, is safer, has good adsorption effect and reduces operating costs, thereby solving the problems mentioned in the background art.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0007] A hydrogen peroxide tail gas adsorption device includes an adsorption tank, an inner filter cartridge, an outer filter cartridge, an adsorption chamber, several air inlets, an adsorption resin layer, an inlet pipe, and an outlet pipe.

[0008] Both the inner and outer filter cartridges are located inside the adsorption tank, with the outer filter cartridge located outside the inner filter cartridge. Both the inner and outer filter cartridges are connected to the adsorption tank. An annular adsorption cavity is formed between the inner and outer filter cartridges. Several air vents are provided in both the inner and outer filter cartridges. The inner side of the inner filter cartridge and the adsorption cavity, as well as the outer side of the outer filter cartridge and the adsorption cavity, are connected through the several air vents. The adsorption cavity is filled with an adsorption resin layer.

[0009] The air inlet pipe passes through the bottom of the adsorption tank and communicates with the inner space of the inner filter cartridge. The air inlet pipe is connected to the adsorption tank. The air outlet pipe passes through the top of the adsorption tank and communicates with the outer space of the outer filter cartridge. The air outlet pipe is connected to the adsorption tank.

[0010] Preferably, the inner filter cartridge, the outer filter cartridge, and the adsorption tank are arranged coaxially.

[0011] A hydrogen peroxide tail gas adsorption system includes several hydrogen peroxide tail gas adsorption devices, an inlet manifold, an outlet manifold, a steam regeneration unit, a gas purging unit, and a spraying unit arranged in parallel as described above.

[0012] The main intake pipe is connected to each intake pipe, and the main exhaust pipe is connected to each exhaust pipe;

[0013] The steam regeneration unit includes a steam main pipe and several steam pipes. Each steam pipe corresponds to an adsorption tank. One end of each steam pipe passes through the top of the adsorption tank and communicates with the outer space of the outer filter cartridge. The steam pipe is connected to the adsorption tank, and the other end of the steam pipe is connected to the steam main pipe.

[0014] The gas purging unit includes a nitrogen pipeline, one end of which is connected to the main air inlet pipe;

[0015] The spray unit includes a main spray water pipe and several spray components. Each spray component corresponds to an adsorption tank. One end of each spray component passes through the top of the adsorption tank and the top of the outer filter cartridge and is connected to the adsorption chamber. Each spray component is connected to the adsorption tank and the outer filter cartridge.

[0016] Preferably, the number of the hydrogen peroxide tail gas adsorption devices is at least six.

[0017] Preferably, the hydrogen peroxide tail gas adsorption system further includes several collection pipes, a condenser, and an oil-water separator. The collection pipes correspond one-to-one with the adsorption tanks. One end of the collection pipe passes through the bottom of the adsorption tank and communicates with the inner space of the inner filter cartridge. The collection pipe is connected to the adsorption tank. The other end of the collection pipe is connected to the inlet of the condenser. The outlet of the condenser is connected to the inlet of the oil-water separator.

[0018] Preferably, control valves are installed on the air inlet pipe, air outlet pipe, steam pipe, nitrogen pipe, spray assembly and collection pipe.

[0019] Preferably, the steam regeneration unit further includes a steam flow meter, which is installed on the steam main.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] This invention relates to a hydrogen peroxide tail gas adsorption device and system. By optimizing the traditional "flat-lay" adsorption structure into a "sleeve-type" coaxial double-layer filter cartridge structure, the contact area between the tail gas and the adsorption resin layer is significantly increased, and the residence time of the tail gas in the adsorption layer is extended, thereby improving the adsorption efficiency. Simultaneously, this structure effectively reduces the impact of the tail gas on the adsorption resin, preventing the resin from being blown away by the airflow or from frictional breakage with the quartz sand, thus extending the resin's service life. Eliminating the need for quartz sand filler also simplifies the filling process. The system adopts a "five-in-one-out" operating mode, enabling multiple adsorption tanks to operate in rotation. Combined with steam regeneration, nitrogen purging, and spray cooling processes, it achieves efficient resin regeneration and reuse, significantly reducing operating energy consumption and material replacement frequency. The adsorption system operates stably, has a compact structure, and can continuously and efficiently remove aromatic organic pollutants from the oxidizing tail gas, balancing operational economy and environmental friendliness. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the adsorption tank structure according to the first embodiment of this utility model.

[0024] Figure 2 This is a schematic diagram of the hydrogen peroxide tail gas adsorption system according to the second embodiment of this utility model.

[0025] In the diagram: 1. Adsorption tank; 2. Inner filter cartridge; 3. Outer filter cartridge; 4. Adsorption chamber; 5. Vent; 6. Adsorption resin layer; 7. Inlet pipe; 8. Outlet pipe; 9. Main inlet pipe; 10. Main outlet pipe; 1101. Steam main pipe; 1102. Steam pipe; 1201. Nitrogen pipe; 1301. Spray water main pipe; 1302. Spray assembly; 14. Collection pipe; 15. Condenser; 16. Oil-water separator; 17. Steam flow meter. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model.

[0027] In this invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used are commercially available or commonly used in the field. Unless otherwise specified, the methods in the following embodiments are conventional methods in the field. Unless otherwise specified, the components or equipment in the following embodiments are general standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0028] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following detailed description, many specific details are set forth to facilitate explanation and provide a comprehensive understanding of the embodiments of the present invention. However, one or more embodiments may be practiced by those skilled in the art without these specific details. Example

[0029] Reference Figure 1 As shown, a hydrogen peroxide tail gas adsorption device includes an adsorption tank 1, an inner filter cartridge 2, an outer filter cartridge 3, an adsorption chamber 4, several air inlets 5, an adsorption resin layer 6, an inlet pipe 7, and an outlet pipe 8.

[0030] Both the inner filter cartridge 2 and the outer filter cartridge 3 are located inside the adsorption tank 1, with the outer filter cartridge 3 coaxially positioned outside the inner filter cartridge 2. The three components—inner filter cartridge 2, outer filter cartridge 3, and adsorption tank 1—are coaxially arranged, forming a compact cylindrical structure. The inner filter cartridge 2 and outer filter cartridge 3 are fixed to the inner shell of the adsorption tank 1 through connections, forming a stable support structure.

[0031] An annular adsorption chamber 4 is formed between the inner filter cartridge 2 and the outer filter cartridge 3. This adsorption chamber 4 is filled with an adsorption resin layer 6 for adsorbing aromatic volatile organic compounds contained in the exhaust gas. Both the inner filter cartridge 2 and the outer filter cartridge 3 have multiple evenly distributed vents 5 on their walls for the free flow of exhaust gas or regeneration gas. The inner space of the inner filter cartridge 2 is connected to the adsorption chamber 4 through the vents 5 of the inner filter cartridge 2, while the outer space of the outer filter cartridge 3 is connected to the adsorption chamber 4 through the vents 5 of the outer filter cartridge 3, thus ensuring that the exhaust gas can fully penetrate the adsorption resin layer 6 for adsorption.

[0032] The inlet pipe 7 enters from the bottom of the adsorption tank 1 and connects directly to the inner space of the inner filter cartridge 2, used to transport the oxidation tail gas from the hydrogen peroxide process into the adsorption tank 1. The outlet pipe 8 exits from the top of the adsorption tank 1 and connects to the outer space of the outer filter cartridge 3, discharging the adsorbed tail gas from the adsorption tank 1. This "inside-to-outside" flow path ensures sufficient contact between the tail gas and the adsorption resin layer 6, improving adsorption efficiency.

[0033] The specific operation of this embodiment is as follows:

[0034] Under normal operating conditions, the oxidizing exhaust gas from the oxidation reaction section is first introduced from the bottom of the adsorption tank 1 through the inlet pipe 7 and enters the inner filter cartridge 2 located inside the adsorption tank 1. As the exhaust gas rises axially in the inner filter cartridge 2, it diffuses radially through the evenly distributed air vents 5 on its cylinder wall and enters the annular adsorption cavity 4 formed between the inner filter cartridge 2 and the outer filter cartridge 3.

[0035] During the process of the exhaust gas passing through the adsorption resin layer 6 filled with filter in the adsorption chamber 4, volatile organic compounds such as aromatic hydrocarbons are effectively captured, achieving efficient adsorption and purification of organic pollutants in the exhaust gas. The purified exhaust gas then enters the outer space of the outer filter cartridge 3 through the air inlet 5, and is discharged from the top of the adsorption tank 1 through the air outlet pipe 8, completing the entire "from the inside out" penetrating adsorption process.

[0036] During operation, due to the multiple air vents 5 on the inner filter cartridge 2 and the outer filter cartridge 3, the exhaust gas can obtain a larger contact area and a longer residence time in the resin layer, thereby improving the adsorption efficiency. At the same time, the cylindrical structure effectively reduces the impact of airflow on the adsorption resin layer 6, preventing the adsorption resin layer 6 from being disturbed by airflow and floating or breaking, significantly extending the service life of the adsorption resin layer 6. Example

[0037] Reference Figure 2 As shown, a hydrogen peroxide tail gas adsorption system includes several hydrogen peroxide tail gas adsorption devices arranged in parallel, as well as an inlet main pipe 9, an outlet main pipe 10, a steam regeneration unit, a gas purging unit, and a spray unit. In this embodiment, six hydrogen peroxide tail gas adsorption devices are provided, which can be named tanks A, B, C, D, E, and F respectively, and adopt a "five in use, one standby" parallel operation mode.

[0038] The main inlet pipe 9 is connected to the inlet pipe 7 of each adsorption tank 1, and the main outlet pipe 10 is connected to the outlet pipe 8 of each adsorption tank 1, for unified distribution and collection of exhaust gas. The steam regeneration unit includes a main steam pipe 1101 and steam pipes 1102 corresponding to each of the six adsorption tanks 1. The steam pipes 1102 enter from the top of the adsorption tank 1 and are connected to the outer space of the outer filter cartridge 3, for high-temperature desorption of the adsorption resin layer 6. The gas purging unit includes a nitrogen pipe 1201, one end of which is connected to the main inlet pipe 9, for purging steam and condensate. The spray unit includes a main spray water pipe 1301 and several spray components 1302. The spray components 1302 enter from the top of the adsorption tank 1 and are connected to the adsorption chamber 4, for cooling the adsorption resin layer 6. Each adsorption tank 1 is also connected to a collection pipe 14 at the bottom. The collection pipe 14 is connected in sequence to the condenser 15 and the oil-water separator 16 for the condensation and recovery of heavy aromatics in the regeneration waste gas.

[0039] Control valves are installed on the inlet pipe 7, outlet pipe 8, steam pipe 1102, nitrogen pipe 1201, spray assembly 1302 and collection pipe 14 in the hydrogen peroxide tail gas adsorption system. A steam flow meter 17 is installed on the steam main pipe 1101 to monitor steam consumption.

[0040] The specific operation of this embodiment is as follows:

[0041] When the hydrogen peroxide tail gas adsorption system is operating normally, five adsorption tanks 1 are in adsorption mode, and one adsorption tank 1 is in regeneration or standby mode. The adsorption and regeneration operations are rotated every 4.5 hours to form a closed-loop continuous operation.

[0042] Taking tank A as an example, the adsorption cycle is 4.5 hours. When tank A reaches adsorption saturation, it switches to regeneration mode. At this time, low-pressure steam at a pressure of 0.1 MPa is introduced through steam pipe 1102, with a steam flow rate of 2268 kg / h and a total consumption of 3402 kg. The desorption time is 1.5 hours. The steam enters the outer space of the outer filter cartridge 3 from the top of adsorption tank 1, passes through the adsorption resin layer 6 filled with the filter, and the desorbed aromatics are drawn out with the steam from the collection pipe 14 at the bottom of adsorption tank 1, and enter the condenser 15 and oil-water separator 16 in sequence to recover heavy aromatic resources.

[0043] After steam desorption is complete, nitrogen is introduced into the inner filter cartridge 2 through the bottom nitrogen pipe 1201 for preliminary purging to remove residual steam. Then, cooling water is sprayed into the adsorption chamber 4 through the top spray assembly 1302 to cool the resin. After spraying, nitrogen is introduced again for secondary drying and purging to remove free moisture. Once the resin temperature and humidity return to operating standards, the adsorption tank 1 enters standby mode, ready to participate in the next adsorption cycle.

[0044] By using a rotating operation mode of five adsorption tanks and one regeneration tank, the adsorption and desorption are automatically cycled, improving equipment utilization, reducing operating energy consumption, and ensuring that the VOCs concentration in the exhaust gas is stably controlled below 40 mg / m³.

[0045] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A peroxide-hydrogen hydration tail gas adsorption device, characterized in that: The hydrogen peroxide tail gas adsorption device includes an adsorption tank (1), an inner filter cartridge (2), an outer filter cartridge (3), an adsorption chamber (4), several air inlets (5), an adsorption resin layer (6), an inlet pipe (7), and an outlet pipe (8). The inner filter cartridge (2) and the outer filter cartridge (3) are both located inside the adsorption tank (1), and the outer filter cartridge (3) is located outside the inner filter cartridge (2). The inner filter cartridge (2) and the outer filter cartridge (3) are both connected to the adsorption tank (1). An annular adsorption cavity (4) is formed between the inner filter cartridge (2) and the outer filter cartridge (3). The inner filter cartridge (2) and the outer filter cartridge (3) are both provided with several air vents (5). The inner side of the inner filter cartridge (2) and the adsorption cavity (4) and the outer side of the outer filter cartridge (3) and the adsorption cavity (4) are connected through several air vents (5). The adsorption cavity (4) is filled with an adsorption resin layer (6). The air inlet pipe (7) passes through the bottom of the adsorption tank (1) and communicates with the inner space of the inner filter cartridge (2). The air inlet pipe (7) is connected to the adsorption tank (1). The air outlet pipe passes through the top of the adsorption tank (1) and communicates with the outer space of the outer filter cartridge (3). The air outlet pipe (8) is connected to the adsorption tank (1).

2. The hydrogen peroxide tail gas adsorption device according to claim 1, characterized in that: The inner filter cartridge (2), the outer filter cartridge (3), and the adsorption tank (1) are arranged coaxially.

3. A peroxide-hydrogen hydration tail gas adsorption system, characterized in that, It includes several parallel-connected hydrogen peroxide tail gas adsorption devices as described in any one of claims 1 to 2, an inlet manifold (9), an outlet manifold (10), a steam regeneration unit, a gas purging unit, and a spraying unit; The main intake pipe (9) is connected to each intake pipe (7), and the main exhaust pipe (10) is connected to each exhaust pipe (8); The steam regeneration unit includes a steam main pipe (1101) and several steam pipes (1102). The steam pipes (1102) correspond one-to-one with the adsorption tank (1). One end of the steam pipe (1102) passes through the top of the adsorption tank (1) and communicates with the outer space of the outer filter cartridge (3). The steam pipe (1102) is connected to the adsorption tank (1), and the other end of the steam pipe (1102) is connected to the steam main pipe (1101). The gas purging unit includes a nitrogen pipeline (1201), one end of which is connected to the main air intake pipe (9); The spray unit includes a spray water main pipe (1301) and several spray components (1302). Each spray component (1302) corresponds to an adsorption tank (1). One end of each spray component (1302) passes through the top of the adsorption tank (1) and the top of the outer filter cartridge (3) and is connected to the adsorption chamber (4). Each spray component (1302) is connected to the adsorption tank (1) and the outer filter cartridge (3).

4. The hydrogen peroxide tail gas adsorption system according to claim 3, characterized in that: The number of the hydrogen peroxide tail gas adsorption devices is at least six.

5. The hydrogen peroxide tail gas adsorption system according to claim 4, characterized in that: The hydrogen peroxide tail gas adsorption system also includes several collection pipes (14), a condenser (15) and an oil-water separator (16). The collection pipes (14) correspond one-to-one with the adsorption tank (1). One end of the collection pipe (14) passes through the bottom of the adsorption tank (1) and is connected to the inner space of the inner filter cartridge (2). The collection pipe (14) is connected to the adsorption tank (1). The other end of the collection pipe (14) is connected to the inlet of the condenser (15). The outlet of the condenser (15) is connected to the inlet of the oil-water separator (16).

6. The hydrogen peroxide tail gas adsorption system according to claim 5, characterized in that: Control valves are installed on the air inlet pipe (7), air outlet pipe (8), steam pipe (1102), nitrogen pipe (1201), spray assembly (1302) and collection pipe (14).

7. The hydrogen peroxide tail gas adsorption system according to claim 6, characterized in that: The steam regeneration unit also includes a steam flow meter (17), which is installed on the steam main (1101).

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