Equipment capable of efficiently adsorbing and recycling high-concentration VOCs tail gas in high air volume in printing industry

Abstract

The utility model discloses equipment capable of efficiently adsorbing and recovering high-concentration VOCs tail gas in high air volume in the printing industry in the technical field of waste gas recovery, which comprises a drying fan, the drying fan is connected with a first adsorption device through a pipeline, one side of the upper end of the first adsorption device is connected with a second adsorption device through a pipeline, and the other side of the upper end of the second adsorption device is connected with a second adsorption device through a pipeline. Recovery ports are fixedly formed in one sides of the lower ends of the second adsorption device and the first adsorption device, the recovery ports are communicated with a condenser, the lower end of the condenser is communicated with a layering tank, and one side of the upper end of the condenser is communicated with condensed water. The equipment process can meet the requirement for solvent recovery of large-air-volume high-concentration VOCs tail gas discharged by enterprises, and compared with a traditional multi-stage cryogenic recovery process, the equipment is simple in technological process and low in energy consumption, the recovered solvent can be directly recycled, green, low-carbon, circulating and sustainable development of the enterprises is achieved, and economic resource consumption is low.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas recovery technology, specifically relating to a device that can efficiently adsorb and recover high-concentration VOCs exhaust gas in high-volume printing industry. Background Technology

[0002] VOCs rotary adsorption technology originated from the rotary dehumidification technology invented by American Bryant in 1950. It involves enriching and concentrating organic matter through a rotary system, which can then be recycled or destroyed. Current rotary materials primarily use ceramic fiber as the base material, forming a honeycomb-shaped, large disc-like system. The wheel surface is coated with hydrophobic zeolite as the adsorbent. This material is expensive. Zeolite rotary wheels can effectively adsorb organic solvents in waste gas, achieving a purification efficiency of over 98%, making it one of the most advanced treatment devices for organic waste gas in China. However, zeolite rotary wheels also have limitations. They have strict requirements for waste gas, including temperature, humidity, and composition. If the waste gas contains dust, its use is not recommended as it easily clogs the rotary wheel. Once clogging or adsorbent poisoning occurs, the entire rotary wheel needs to be replaced, which is very costly.

[0003] Existing recycling equipment is expensive, has many requirements, and is not very efficient, wasting a lot of resources and having certain limitations. Utility Model Content

[0004] The purpose of this invention is to provide a device that can efficiently adsorb and recover high-concentration VOCs exhaust gas from high-volume printing industries, thereby solving the problems mentioned in the background art, such as high cost, numerous requirements, low recovery efficiency, waste of a large amount of resources, and certain limitations of existing recovery equipment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a device capable of efficiently adsorbing and recovering high-volume, high-concentration VOCs exhaust gas from the printing industry, comprising a drying fan, wherein the drying fan is connected to a first adsorption device via a pipe, and a second adsorption device is connected to the upper side of the first adsorption device via a pipe, wherein a recovery port is fixedly opened on the lower side of the second adsorption device and the first adsorption device, the recovery port is connected to a condenser, the lower end of the condenser is connected to a stratification tank, and the upper side of the condenser is connected to condensate.

[0006] Preferably, the first adsorption device includes a first filter cylinder and a first discharge cylinder, wherein the first filter cylinder is sleeved inside the center of the first discharge cylinder, and a primary adsorption wheel is provided inside the first filter cylinder.

[0007] Preferably, the second adsorption device includes a second discharge cylinder, a second filter cylinder, and a secondary adsorption wheel. The second filter cylinder is fixedly connected inside the second discharge cylinder, and the secondary adsorption wheel is fixedly connected to the center of the second filter cylinder. A discharge port is fixedly opened on one side of the second discharge cylinder.

[0008] Compared with the prior art, the beneficial effects of this utility model are:

[0009] 1. The equipment and process of this utility model can meet the solvent recovery requirements of large-volume, high-concentration VOCs exhaust gas emitted by enterprises. Compared with the traditional multi-stage cryogenic recovery process, the process of this equipment is simple, energy consumption is low, and the recovered solvent can be directly recycled and reused, realizing the green, low-carbon, circular and sustainable development of enterprises with low economic resource consumption. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] In the diagram: 1. Drying fan; 2. First filter cartridge; 3. First discharge cartridge; 4. Second discharge cartridge; 5. Second filter cartridge; 6. Discharge port; 7. Condenser; 8. Layering tank; 9. Condensate; 10. Recovery port; 12. Second adsorption device; 13. First adsorption device; 14. Primary adsorption rotor; 15. Secondary adsorption rotor. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] Please see Figure 1 This utility model provides a technical solution: a device capable of efficiently adsorbing and recovering high-concentration VOCs exhaust gas in high-volume printing industry, including a drying fan 1. The drying fan 1 is connected to a first adsorption device 13 via a pipe. A second adsorption device 12 is connected to the upper side of the first adsorption device 13 via a pipe. A recovery port 10 is fixedly opened on the lower side of the second adsorption device 12 and the first adsorption device 13. The recovery port 10 is connected to a condenser 7. The lower end of the condenser 7 is connected to a layered tank 8. The upper side of the condenser 7 is connected to condensate water 9.

[0014] In this implementation scheme, after the exhaust gas is emitted, it passes through the front-end pretreatment system and is dried and cooled by the set drying fan 1. Then, the exhaust gas enters the interior of the first adsorption device 13 for adsorption, reducing airflow and increasing concentration. The concentration ratio is higher than that of traditional zeolite rotors. After that, it is sent to the second adsorption device 12 for adsorption, thereby achieving emission standards. The high-concentration VOCs tail gas adsorbed by the second adsorption device 12 and the first adsorption device 13 is sent to the condenser 7 for cryogenic recovery of organic solvents. Then, it enters the interior of the stratification tank 8 for stratified recovery. This design and equipment process can meet the solvent recovery requirements of large-volume, high-concentration VOCs tail gas emitted by enterprises. Compared with traditional multi-stage cryogenic recovery processes, this equipment has a simple process flow, low energy consumption, and the recovered solvent can be directly recycled and reused, realizing the green, low-carbon, circular, and sustainable development of enterprises with low economic resource consumption.

[0015] Specifically, the first adsorption device 13 includes a first filter cylinder 2 and a first discharge cylinder 3. The first filter cylinder 2 is sleeved inside the center of the first discharge cylinder 3, and a primary adsorption wheel 14 is provided inside the first filter cylinder 2.

[0016] In this embodiment, the exhaust gas enters the first filter cylinder 2 and is adsorbed by the primary adsorption wheel 14. At the same time, the airflow can be reduced. The purified exhaust gas can flow into the first discharge cylinder 3 and then into the second adsorption device 12 for secondary adsorption.

[0017] Specifically, the second adsorption device 12 includes a second discharge cylinder 4, a second filter cylinder 5, and a secondary adsorption wheel 15. The second filter cylinder 5 is fixedly connected inside the second discharge cylinder 4, and the secondary adsorption wheel 15 is fixedly connected to the center of the second filter cylinder 5. A discharge port 6 is fixedly opened on one side of the second discharge cylinder 4.

[0018] In this embodiment, the waste gas after primary adsorption flows into the interior of the second filter cartridge 5, where it undergoes secondary adsorption through the secondary adsorption rotor 15. The filtered waste gas can be discharged through the discharge port 6, while the waste gas after secondary adsorption can be sent to the interior of the condenser 7 for cryogenic recovery of organic solvents.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device capable of efficiently adsorbing and recovering high-concentration VOCs exhaust gas from high-volume printing industries, comprising a drying fan (1), characterized in that: The drying fan (1) is connected to a first adsorption device (13) via a pipe. The upper end of the first adsorption device (13) is connected to a second adsorption device (12) via a pipe. The lower end of the second adsorption device (12) and the first adsorption device (13) are fixedly provided with a recovery port (10). The recovery port (10) is connected to a condenser (7). The lower end of the condenser (7) is connected to a layered tank (8). The upper end of the condenser (7) is connected to condensate (9).

2. The device according to claim 1, capable of efficiently adsorbing and recovering high-concentration VOCs exhaust gas from high-volume printing industries, is characterized in that: The first adsorption device (13) includes a first filter cylinder (2) and a first discharge cylinder (3). The first filter cylinder (2) is sleeved inside the center of the first discharge cylinder (3). A first-stage adsorption wheel (14) is provided inside the first filter cylinder (2).

3. The device according to claim 1, capable of efficiently adsorbing and recovering high-concentration VOCs exhaust gas from high-volume printing industries, is characterized in that: The second adsorption device (12) includes a second discharge cylinder (4), a second filter cylinder (5) and a secondary adsorption wheel (15). The second filter cylinder (5) is fixedly connected inside the second discharge cylinder (4). The secondary adsorption wheel (15) is fixedly connected to the center of the second filter cylinder (5). A discharge port (6) is fixedly opened on one side of the second discharge cylinder (4).

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