CN205667793U - A kind of novel VOC exhaust-gas treatment cleaning system - Google Patents

Abstract

A new type of VOC exhaust gas treatment and purification system, including a first-level wet treatment section, a second-level photocatalyst treatment section and a chimney; the first-level wet treatment section is composed of a circulating exhaust gas scrubber; the air inlet of the circulating exhaust gas scrubber is covered with a suction hood , the interior of the circulating exhaust gas scrubber is provided with a primary spray layer and a secondary spray layer in parallel, and a defogging layer is provided below the air outlet of the circulating exhaust gas scrubber; one side of the circulating exhaust gas scrubber is provided with a supply primary spray layer and the circulating water pump for spraying liquid medicine in the secondary spraying layer; the secondary photocatalyst treatment section is composed of a photocatalyst organic waste gas purifier; the air outlet of the circulating waste gas scrubber is connected to the photocatalyst organic waste gas purifier through a ventilation pipe and an exhaust fan. The system is designed in strict accordance with the national standards on labor, sanitation, fire protection and environmental protection, and the ventilation and exhaust are implemented according to the process requirements. The process structure is simple, the ventilation volume and wind pressure are uniform, the operating cost is low, and the efficiency is high.

Description

A new type of VOC waste gas treatment and purification system

technical field

The utility model relates to the field of waste gas treatment systems, in particular to a novel VOC waste gas treatment and purification system.

Background technique

For VOC organic waste gas generated in chemical, coating and other processes, the single-stage adsorption device equipment often used in traditional processes uses activated carbon particles to have adsorption effect to remove organic matter and odors in the waste gas. In the professional production of chemical industry, paint, PCB, semiconductor manufacturing, medicine, electric ceramics and other treatment processes, some VOC organic matter and odor gas waste gas will be produced, such as: (acetone, toluene, xylene, phenol, dimethylaniline, formaldehyde, n-hexane, ethyl acetate, ethanol, etc.). Judging from its physical and chemical properties, if it is discharged directly, it will inevitably cause pollution to the atmosphere and the surrounding environment. Therefore, the waste gas produced in the production process must be treated before it can be discharged to meet the national waste gas emission standards.

Utility model content

In order to overcome the technical defects, the purpose of this utility model is to propose a new VOC waste gas treatment and purification system that can reduce secondary pollution and reduce operating costs.

In order to achieve the above object, the utility model adopts the following technical solutions:

A new type of VOC waste gas treatment and purification system, characterized in that: it includes a first-level wet treatment section, a second-level photocatalyst treatment section and a chimney; the first-level wet treatment section is composed of a circulating exhaust gas scrubber; the inlet of the circulating exhaust gas scrubber A suction hood is provided at the tuyere, a primary spray layer and a secondary spray layer are arranged in parallel inside the circulating exhaust gas scrubber, and a defogging layer is provided under the air outlet of the circulating exhaust gas scrubber; One side is provided with a circulating water pump for supplying the first-level spraying layer and the second-level spraying layer; the second-level photocatalyst treatment section is composed of a photocatalyst organic waste gas purifier; the air outlet of the circulating waste gas scrubber passes through the ventilation pipe , the exhaust fan is connected with the photocatalyst organic waste gas purifier; the inside of the photocatalyst organic waste gas purifier is provided with many parallel ultraviolet lamps, and is also filled with catalyst; the air outlet of the photocatalyst organic waste gas purifier is directly connected to the 15m high In the chimney; there is a detection port in the middle of the chimney.

The explanation of the above scheme and further schemes are as follows:

1. In the above scheme, multiple observation holes are opened on the circulating waste gas scrubber.

2. In the above scheme, a lightning rod stands on the top of the chimney

Due to the application of the above-mentioned technical solutions, the utility model has the following advantages compared with the prior art:

The utility model provides a new type of VOC waste gas treatment and purification system, which solves the phenomenon that the composition of organic waste gas is complex and variable in the background technology and the adsorption of adsorbents is selective and limited, and reduces the generation of secondary solid waste. The new equipment occupies a small area, has a compact and reasonable structure, beautiful appearance, high processing efficiency, stable operation, and low investment and operation costs.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the above drawings: 1. Circulating waste gas scrubber; 2. Suction hood; 3. Primary spray layer; 4. Secondary spray layer; 5. Air outlet; 6. Demister layer; 7. Circulating water pump; 8. Photocatalyst organic waste gas purification tower; 9. Ventilation pipe; 10. Exhaust fan; 11. Ultraviolet lamp; 12. Chimney; 13. Detection port; 14. Observation port; 15. Lightning rod.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Embodiment: see shown in Fig. 1:

A new type of VOC exhaust gas treatment and purification system, including a first-level wet treatment section, a second-level photocatalyst treatment section and a chimney; the first-level wet treatment section is composed of a circulating exhaust gas scrubber 1; The wind cover 2, the inside of the circulating exhaust gas scrubber 1 are provided with a primary spray layer 3 and the secondary spray layer 4 in parallel, and a defogging layer 6 is provided below the air outlet 5 of the circulating exhaust gas scrubber 1; One side is provided with a circulating water pump 7 for supplying the primary spray layer 3 and the secondary spray layer 4 to spray liquid medicine; the secondary photocatalyst treatment section is composed of a photocatalyst organic waste gas purifier 8; the air outlet 5 of the circulating waste gas scrubber 1 passes through The air duct 9 and the exhaust fan 10 are connected with the photocatalyst organic waste gas purifier 8; the inside of the photocatalyst organic waste gas purifier 8 is provided with multiple parallel ultraviolet lamps 11, which are also filled with catalysts; the air outlet of the photocatalyst organic waste gas purifier 8 is directly It is connected to the chimney 12 with a height of 15m; the middle part of the chimney 12 has a detection port 13 .

Preferably, a plurality of observation holes 14 are opened on the circulating exhaust gas scrubber 1 .

Preferably, a lightning rod 15 stands on the top of the chimney 12 .

Under the action of the main fan of the system, the exhaust gas is collected from each discharge point to the suction hood 2, and then discharged into the circulating exhaust gas scrubber 1 through the pipeline. Exhaust gas enters the tower from the bottom of the circulating exhaust gas scrubber 1 and moves upward. The circulating water pump 7 supplies the spraying agents to the primary spray layer 3 and the secondary spray layer 4 . The droplets ejected from the nozzle in the tower move relative to the airflow. At the same time, the circulating exhaust gas scrubber 1 is equipped with at least 2.5m long packing material, which increases the contact area with the gas, makes the gas fully contact with the liquid droplets, and passes through the primary spray layer 3 and the secondary spray layer 3 in the circulating exhaust gas scrubber 1. After the spraying layer 4 is sprayed and washed, the effect of purifying particles, steam and some volatiles is achieved. Then the gas passes through the defogging layer 6 of the circulating waste gas washing tower 1, after trapping mist and part of the volatile gas, it is blown into the photocatalyst organic waste gas purifier 8 through the exhaust fan 10 for ultimate purification, under the condition of ultraviolet light irradiation, Pollutants are adsorbed on the surface of the catalyst, combined with free electrons or holes, and a redox reaction occurs, and the organic matter is completely mineralized to achieve the purification effect. The gas is finally discharged into the atmosphere at a height of 15 meters above the ground, which meets the national secondary emission standard.

The system is designed in strict accordance with the national standards on labor, sanitation, fire protection and environmental protection, and the ventilation and exhaust are implemented according to the process requirements. The process structure is simple, the ventilation volume and wind pressure are uniform, the operating cost is low, and the efficiency is high.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present utility model, and its purpose is to enable those familiar with this technology to understand the content of the present utility model and implement it accordingly, and not to limit the protection scope of the present utility model. All equivalent changes or modifications made according to the utility model shall be covered within the protection scope of the utility model.

Claims (3)

1. A novel VOC waste gas treatment and purification system is characterized in that: it comprises a first-level wet treatment section and a secondary photocatalyst treatment section and a chimney; the first-level wet treatment section is made up of a circulating waste gas scrubber (1); the circulation The air inlet of the exhaust gas scrubber (1) is provided with a suction hood (2), and the inside of the circulating exhaust gas scrubber (1) is provided with a primary spray layer (3) and a secondary spray layer (4) in parallel. A defogging layer (6) is provided below the air outlet (5) of the exhaust gas scrubber (1); one side of the circulating exhaust gas scrubber (1) is provided with a primary spray layer (3) and a secondary spray layer. Layer (4) circulating water pump (7) for spraying liquid medicine; said secondary photocatalyst treatment section is composed of photocatalyst organic waste gas purifier (8); (9), exhaust fan (10) is connected with photocatalyst organic waste gas purifier (8); The interior of described photocatalyst organic waste gas purifier (8) is provided with many parallel ultraviolet lamps (11), also filled with catalyzer; The air outlet of the photocatalyst organic waste gas purifier (8) is directly connected to a chimney (12) with a height of 15m; a detection port (13) is opened in the middle of the chimney (12). 2. A new type of VOC exhaust gas treatment and purification system according to claim 1, characterized in that: the circulating exhaust gas scrubber (1) is provided with a plurality of observation holes (14). 3. A novel VOC waste gas treatment and purification system according to claim 1, characterized in that: a lightning rod (15) stands on the top of the chimney (12).