Experimental VOCs catalytic oxidation device capable of continuously adsorbing

Abstract

The utility model relates to the field of VOCs (volatile organic compounds) catalytic oxidation devices, in particular to an experimental VOCs catalytic oxidation device capable of continuously adsorbing, which adopts the technical scheme that the experimental VOCs catalytic oxidation device capable of continuously adsorbing comprises an adsorption chamber, a catalytic combustion chamber, an adsorption and desorption cavity, a baffle and a moving component, a catalytic combustion chamber connected with the adsorption chamber through a pipeline is installed above the adsorption chamber, a catalyst is placed in the catalytic combustion chamber, two adsorption and desorption cavities which are opposite left and right are formed in the adsorption chamber, the activated carbon bags are placed in the adsorption and desorption cavities, and baffles located in the adsorption and desorption cavities are arranged in the adsorption chamber. A moving assembly for changing the position of the baffle is mounted in the adsorption chamber; the two adsorption and desorption cavities are formed in the adsorption chamber, when catalytic oxidation operation needs to be carried out, the moving assembly drives the baffle to move to the front side of one path, a channel is closed, the part carries out desorption work, and the other part reduces the frequency of a fan, reduces the exhaust air rate and still carries out adsorption work.

Description

Technical Field

[0001] The utility model belongs to the field of VOCs catalytic oxidation devices, and particularly relates to an experimental VOCs catalytic oxidation device with sustainable adsorption. Background Art

[0002] In the petrochemical industry, processing petroleum produces volatile organic compounds called VOCs, which are discharged with the waste gas and are likely to cause air pollution. It is necessary to purify the waste gas through a VOCs catalytic oxidation device before discharge.

[0003] Currently, when the existing VOCs catalytic oxidation device performs catalytic oxidation operation, it is necessary to stop the exhaust system on the device and only operate the desorption module. After the exhaust system is stopped, experimental analysis and detection cannot be carried out, resulting in a reduction in work efficiency.

[0004] Therefore, in view of the problem that the existing VOCs catalytic oxidation device needs to close the exhaust system during desorption, and experimental analysis and detection cannot be carried out, resulting in a reduction in work efficiency, the existing VOCs catalytic oxidation device is improved. The adsorption tube is divided into two independently operating sections. During desorption, one section is desorbed, and the other section still performs adsorption work. Content of the Utility Model

[0005] In order to overcome the problem that the existing VOCs catalytic oxidation device needs to close the exhaust system during desorption, and experimental analysis cannot be carried out, resulting in a reduction in work efficiency.

[0006] The technical solution of the utility model is: an experimental VOCs catalytic oxidation device with sustainable adsorption, including an adsorption chamber, a catalytic combustion chamber, an adsorption and desorption cavity, a baffle, and a moving component; a catalytic combustion chamber connected to the adsorption chamber through a pipeline is installed above the adsorption chamber, a catalyst is placed in the catalytic combustion chamber, two left-right opposite adsorption and desorption cavities are opened in the adsorption chamber, activated carbon packets are placed in the adsorption and desorption cavities, a baffle located in the adsorption and desorption cavities is arranged in the adsorption chamber, and a moving component for changing the position of the baffle is installed in the adsorption chamber.

[0007] Preferably, by opening two adsorption and desorption cavities in the adsorption chamber, when catalytic oxidation operation is required, the baffle is driven by the moving component to move to the front side of one path to close the channel, and desorption work is carried out on this part, while the air volume of the fan is reduced in the other part, and adsorption work is still carried out.

[0008] Preferably, a first air inlet pipe for transporting oxygen is fixedly connected to the catalytic combustion chamber; a first exhaust pipe and a drain pipe are fixedly connected to the catalytic combustion chamber. The exhaust gas that has completed desorption by the desorbent reacts with oxygen at high temperature, and the catalyst is responsible for accelerating such a reaction to convert the exhaust gas into carbon dioxide and water, which are discharged through the first exhaust pipe and the drain pipe respectively.

[0009] Preferably, a second air inlet pipe for inputting the desorbent is fixedly connected to the adsorption chamber, and a one-way valve is installed on the pipe connecting the catalytic combustion chamber and the adsorption chamber. During the desorption operation, a hot air stream serving as the desorbent is injected into the adsorption and desorption cavity through the second air inlet pipe to desorb the organic matter adsorbed on the activated carbon and send these high-concentration organic exhaust gases into the catalytic combustion chamber.

[0010] Preferably, the moving assembly includes a threaded rod, a limiting column, and a motor; the threaded rod is inserted into the adsorption chamber, the limiting column is fixedly connected inside the adsorption chamber, a threaded hole matching the threaded rod is provided in the file, and a motor connected to the threaded rod through a transmission element is installed outside the adsorption chamber. The motor drives the threaded rod to rotate. Under the restriction of the limiting column, the baffle screwed on the threaded rod cannot rotate with the threaded rod but moves along the limiting column.

[0011] Preferably, a storage groove matching the baffle is provided inside the adsorption chamber, and two third air inlet pipes with built-in valve structures are fixedly connected to the front end of the adsorption chamber. The storage groove can provide a storage area for the baffle to prevent the adsorption efficiency from being reduced by blocking the cavity opening when neither of the two adsorption and desorption cavities is closed.

[0012] Preferably, an exhaust fan is installed at the rear side of the adsorption chamber, and a detection box is installed at the rear side of the exhaust fan at the rear side of the adsorption chamber. The exhaust fan sucks the gas purified by adsorption into the detection box, and a sensor is installed inside the detection box to detect the VOC concentration in the gas.

[0013] Preferably, two second exhaust pipes with built-in valve structures are fixedly connected to the left and right ends of the detection box, and the left second exhaust pipe is connected to the left third air inlet pipe. When the VOC concentration in the gas inside the detection box is too high, it is transported into the adsorption chamber through the second exhaust pipe and the third air inlet pipe for secondary purification.

[0014] The beneficial effects of the present utility model:

[0015] 1. By improving the existing VOCs catalytic oxidation device, each function is partitioned and integrated on the original basis. Two adsorption and desorption chambers are opened in the adsorption chamber. In the normal working mode, the two parts operate together to undertake the VOCs adsorption function. When catalytic oxidation operation is required, the baffle is driven by the moving component to move to the front side of one path, closing the channel. This part conducts desorption work, while the other part reduces the fan frequency and the exhaust air volume, and still conducts adsorption work.

[0016] 2. The exhaust fan sucks the gas purified by the activated carbon package from the adsorption and desorption chamber into the detection box. A concentration detector is inserted in the detection box to detect the content of VOC in the waste gas. If it is qualified, it is discharged through the second exhaust pipe. Once it is too high, the gas is sent back to the adsorption chamber for secondary purification through another second exhaust pipe connected to the third intake pipe. Description of the Drawings

[0017] Figure 1 Shown is the first three-dimensional structure schematic diagram of the experimental VOCs catalytic oxidation device for sustainable adsorption of the present utility model;

[0018] Figure 2 Shown is the three-dimensional structure schematic diagram of the moving component of the experimental VOCs catalytic oxidation device for sustainable adsorption of the present utility model;

[0019] Figure 3 Shown is the three-dimensional structure schematic diagram of the catalytic combustion chamber of the experimental VOCs catalytic oxidation device for sustainable adsorption of the present utility model;

[0020] Figure 4 Shown is the first three-dimensional structure schematic diagram of the adsorption chamber of the experimental VOCs catalytic oxidation device for sustainable adsorption of the present utility model;

[0021] Figure 5 Shown is the second three-dimensional structure schematic diagram of the adsorption chamber of the experimental VOCs catalytic oxidation device for sustainable adsorption of the present utility model;

[0022] Figure 6 Shown is the third three-dimensional structure schematic diagram of the adsorption chamber of the experimental VOCs catalytic oxidation device for sustainable adsorption of the present utility model.

[0023] Description of the Reference Numerals: 1. Adsorption chamber; 2. Catalytic combustion chamber; 3. Adsorption and desorption chamber; 4. Baffle; 5. First intake pipe; 6. First exhaust pipe; 7. Drain pipe; 8. Second intake pipe; 901. Threaded rod; 902. Limit post; 903. Motor; 10. Storage groove; 11. Third intake pipe; 12. Exhaust fan; 14. Detection box; 15. Second exhaust pipe. Detailed Embodiment

[0024] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] Please refer to Figures 1-6 , the present utility model provides an embodiment: an experimental VOCs catalytic oxidation device with sustainable adsorption includes an adsorption chamber 1, a catalytic combustion chamber 2, an adsorption and desorption cavity 3, a baffle 4 and a moving component; a catalytic combustion chamber 2 connected to the adsorption chamber 1 through a pipeline is installed above the adsorption chamber 1, a catalyst is placed in the catalytic combustion chamber 2, two relatively left and right adsorption and desorption cavities 3 are opened in the adsorption chamber 1, activated carbon packets are placed in the adsorption and desorption cavities 3, a baffle 4 located in the adsorption and desorption cavities 3 is arranged in the adsorption chamber 1, and a moving component for changing the position of the baffle 4 is installed in the adsorption chamber 1. By opening two adsorption and desorption cavities 3 in the adsorption chamber 1, when catalytic oxidation operation is required, the moving component drives the baffle 4 to move to the front side of one path, closes the channel, and this part performs desorption work, while the other part reduces the fan frequency and the exhaust air volume and still performs adsorption work.

[0026] Please refer to Figures 2-4 , in this embodiment, a first air inlet pipe 5 for transporting oxygen is fixedly connected to the catalytic combustion chamber 2; a first exhaust pipe 6 and a drain pipe 7 are fixedly connected to the catalytic combustion chamber 2, a second air inlet pipe 8 for inputting a desorbent is fixedly connected to the adsorption chamber 1, a one-way valve is installed on the pipeline connecting the catalytic combustion chamber 2 and the adsorption chamber 1, and the moving component includes a threaded rod 901, a limiting column 902 and a motor 903; the threaded rod 901 is inserted into the adsorption chamber 1, the limiting column 902 is fixedly connected in the adsorption chamber 1, a threaded hole matching the threaded rod 901 is opened in the file, and a motor 903 with a transmission element connected to the threaded rod 901 is installed outside the adsorption chamber 1. The exhaust gas completed by desorption with the desorbent reacts with oxygen at high temperature, and the catalyst is responsible for accelerating such a reaction to convert the exhaust gas into carbon dioxide and water, and the carbon dioxide and water are discharged through the first exhaust pipe 6 and the drain pipe 7 respectively. When performing desorption work, a hot air flow as a desorbent is injected into the adsorption and desorption cavity 3 through the second air inlet pipe 8 to desorb the organic matter adsorbed on the activated carbon and send these high-concentration organic exhaust gases into the catalytic combustion chamber 2. The motor 903 drives the threaded rod 901 to rotate. Under the limitation of the limiting column 902, the baffle 4 screwed on the threaded rod 901 cannot rotate with the threaded rod 901 but moves along the limiting column 902.

[0027] Please refer to Figure 1 , Figure 5 , Figure 6, in this embodiment, a storage groove 10 matching the baffle 4 is formed in the adsorption chamber 1. Two third air inlet pipes 11 are fixedly connected to the front end of the adsorption chamber 1. An exhaust fan 12 is installed at the rear side of the adsorption chamber 1. A detection box 14 is installed at the rear side of the adsorption chamber 1 and behind the exhaust fan 12. Two second exhaust pipes 15 with built-in valve structures are fixedly connected to the left and right ends of the detection box 14. One second exhaust pipe 15 on the left is connected to one third air inlet pipe 11 on the left. The storage groove 10 can provide a storage area for the baffle 4, preventing the blocking of the cavity opening and reducing the adsorption efficiency when neither of the two adsorption and desorption cavities 3 is closed. The exhaust fan 12 sucks the gas purified by adsorption into the detection box 14. A sensor is installed in the detection box 14 to detect the VOC concentration in the gas. When the VOC concentration in the gas in the detection box 14 is too high, it is transported into the adsorption chamber 1 through the second exhaust pipe 15 and the third air inlet pipe 11 for secondary purification.

[0028] During operation, first, the staff inputs the waste gas generated by the petroleum industry into the adsorption box through the third air inlet pipe 11. The waste gas enters the adsorption and desorption cavity 3 and passes through the activated carbon package. Using the porous structure and huge surface tension of the activated carbon, the organic solvents in the waste gas are adsorbed. The high adsorption capacity of the activated carbon effectively removes the organic substances in the waste gas. The exhaust fan 12 is started to suck the purified waste gas into the detection box 14, and the VOC content in the detection box 14 is detected. If it is qualified, it is discharged; if it is unqualified, it is discharged through the second exhaust pipe 15 connected to the third air inlet pipe 11 for secondary purification.

[0029] When desorption is required, the motor 903 is started. The motor 903 drives the threaded rod 901 to rotate. Under the restriction of the limit post 902, the baffle 4 moves along the limit post 902 to the front end of one of the adsorption and desorption cavities 3 to achieve the effect of closing the channel. At the same time, the exhaust fan 12 of this channel is turned off, and the frequency of the exhaust fan 12 at the other end is reduced to reduce the exhaust air volume, while the adsorption work continues at the other end.

[0030] The hot air flow used as the desorbent is injected into the adsorption and desorption cavity 3 to desorb the organic substances adsorbed on the activated carbon, and these high-concentration organic waste gases are sent to the catalytic combustion chamber 2, where they undergo an oxidation reaction with the oxygen input through the first air inlet pipe 5 under the action of high temperature. The catalyst can accelerate the reaction rate, and the generated carbon dioxide and water are discharged through the first exhaust pipe 6 and the drain pipe 7.

[0031] Through the above steps, the existing VOCs catalytic oxidation device is improved, and each function is partitioned and integrated on the original basis. Two adsorption and desorption chambers 3 are opened in the adsorption chamber 1. Under the normal working mode, the two parts of the area operate together to undertake the VOCs adsorption function. When catalytic oxidation operation is required, the baffle 4 is driven by the moving component to move to the front side of one of the paths to close the channel, and this part conducts desorption work. The other part reduces the fan frequency and the exhaust air volume and still conducts adsorption work, so as to solve the problem that the existing VOCs catalytic oxidation device needs to close the exhaust system during desorption, resulting in the inability to carry out experimental analysis and the reduction of work efficiency.

[0032] The above has described the embodiments of the present invention in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the scope of knowledge possessed by those skilled in the art.

Claims

1. An experimental VOCs catalytic oxidation device with sustainable adsorption, comprising an adsorption chamber (1) and a catalytic combustion chamber (2); characterized in that, It further includes an adsorption and desorption chamber (3), a baffle plate (4) and a moving component; above the adsorption chamber (1), a catalytic combustion chamber (2) connected to the adsorption chamber (1) through a pipeline is installed. A catalyst is placed in the catalytic combustion chamber (2). Two adsorption and desorption chambers (3) opposite to each other left and right are arranged in the adsorption chamber (1). The activated carbon packets are placed in the adsorption and desorption chambers (3). A baffle plate (4) located in the adsorption and desorption chambers (3) is arranged in the adsorption chamber (1). A moving component for changing the position of the baffle plate (4) is installed in the adsorption chamber (1).

2. The experimental VOCs catalytic oxidation device with sustainable adsorption according to claim 1, characterized in that, A first air inlet pipe (5) for transporting oxygen is fixedly connected to the catalytic combustion chamber (2); a first exhaust pipe (6) and a drain pipe (7) are fixedly connected to the catalytic combustion chamber (2).

3. The VOCs catalytic oxidation device for experimental use with sustainable adsorption according to claim 2, wherein, A second air inlet pipe (8) for inputting a desorbent is fixedly connected to the adsorption chamber (1). A one-way valve is installed on the pipeline connecting the catalytic combustion chamber (2) and the adsorption chamber (1).

4. The experimental VOCs catalytic oxidation device with sustainable adsorption according to claim 3, characterized in that, The moving component includes a threaded rod (901), a limiting column (902) and a motor (903); the threaded rod (901) is inserted into the adsorption chamber (1), the limiting column (902) is fixedly connected in the adsorption chamber (1), a threaded hole matching the threaded rod (901) is arranged in the file, and a motor (903) with a transmission element connected to the threaded rod (901) is installed outside the adsorption chamber (1).

5. The VOCs catalytic oxidation device for experimental use with sustainable adsorption according to claim 4, characterized in that, A storage groove (10) matching the baffle plate (4) is arranged in the adsorption chamber (1), and two third air inlet pipes (11) are fixedly connected to the front end of the adsorption chamber (1).

6. The VOCs catalytic oxidation device for experimental use with sustainable adsorption according to claim 5, characterized in that, An exhaust fan (12) is installed at the rear side of the adsorption chamber (1), and a detection box (14) is installed at the rear side of the adsorption chamber (1) and behind the exhaust fan (12).

7. The VOCs catalytic oxidation device for experimental use with sustainable adsorption according to claim 6, characterized in that, Two second exhaust pipes (15) with built-in valve structures are fixedly connected to the left and right ends of the detection box (14), and the left second exhaust pipe (15) is connected to the left third air inlet pipe (11).

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