VOCs catalyst drying device

Abstract

The utility model discloses a VOCs catalyst drying device, and relates to the technical field of catalysts. The VOCs catalyst drying device of the utility model first performs a filter press treatment before drying, and filters out most of the liquid in the VOCs catalyst, which is convenient for subsequent drying treatment, improves the drying efficiency, and achieves energy-saving effects; at the same time, the VOCs catalyst after the filter press is stirred and broken up by a stirring rod in a hopper to prevent the VOCs catalyst after the filter press from agglomerating, ensuring that it can be spread more loosely and evenly on the belt conveyor below, which is convenient for hot air to evaporate the liquid therein, and further improves the drying efficiency; in addition, the utility model also uses a plurality of belt conveyors to transport the VOCs catalyst while drying it, so that it is evenly heated during the transportation process, ensuring the uniformity of the drying effect.

Description

Technical Field

[0001] The utility model relates to the technical field of catalysts, in particular to a VOCs catalyst drying device. Background Art

[0002] Drying VOCs (volatile organic compounds) catalysts is a critical step in their production process for the following reasons:

[0003] 1) Prevent catalyst poisoning: Water may carry impurities or soluble salts, which may form deposits on the catalyst surface, covering the active sites, causing catalyst poisoning and reducing its catalytic oxidation efficiency for VOCs.

[0004] 2) Ensure catalyst activity: VOCs catalysts usually rely on specific metal oxides or precious metals as active components. The presence of moisture may react with these active components, changing their chemical state and thus affecting the activity of the catalyst.

[0005] 3) Improve catalyst selectivity: In the VOCs treatment process, selectivity is crucial, that is, the catalyst should preferentially catalyze the oxidation reaction of the target VOCs, while moisture may promote the occurrence of side reactions and reduce the selectivity of the catalyst for the target VOCs.

[0006] 4) Enhance the thermal stability of the catalyst: VOCs catalytic oxidation is usually carried out at higher temperatures. The dried catalyst has better thermal stability and can withstand high temperature environments without structural collapse or loss of active components.

[0007] 5) Optimizing the pore structure of the catalyst: The drying process helps to form and stabilize the pore structure of the catalyst and increase the specific surface area, which is crucial for the adsorption and catalytic oxidation of VOCs because a larger specific surface area means more active sites are available.

[0008] 6) Easy to shape the catalyst: The dried catalyst powder is easier to shape, such as pressing into tablets, extruding strips or making into spheres, to meet the needs of different application scenarios.

[0009] 7) Improve storage stability of catalysts: The dried catalyst is not easily affected by moisture, agglomerates or undergoes chemical changes during storage, thus maintaining its stable performance.

[0010] In summary, drying the VOCs catalyst is a key step to ensure its efficient, stable and environmentally friendly treatment of VOCs pollution.

[0011] Existing VOCs catalyst drying devices usually directly dry the VOCs catalyst, resulting in low efficiency and high energy consumption. Therefore, there is an urgent need to develop an efficient and energy-saving VOCs catalyst drying device. Utility Model Content

[0012] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and provide a VOCs catalyst drying device, which first performs filter pressing on the VOCs catalyst to filter out most of the liquid therein, thereby facilitating subsequent drying treatment, improving drying efficiency, and also achieving energy-saving effects.

[0013] The technical solution of the utility model is:

[0014] The VOCs catalyst drying device comprises a filter pressing unit and a drying unit. The filter pressing unit comprises a filter pressing box, a feed hopper is arranged on one side of the filter pressing box, a filter plate is arranged obliquely in the filter pressing box, the filter plate is located at the bottom of the feed hopper and is provided with a vibrator; a cylinder is arranged on the top of the filter pressing box, the piston rod of the cylinder faces downward and is connected with a pressing plate, and the pressing plate is adapted to the filter plate; a liquid outlet is arranged at the bottom of the filter pressing box, and a discharge outlet is arranged on the side of the filter pressing box opposite to the feed hopper, and the discharge outlet is located at the filter plate; the drying unit comprises a shell, a plurality of belt conveyors are sequentially installed in the shell from top to bottom, a hot air inlet is arranged on the shell, a hopper is arranged at the feed end of the shell, and a discharge hopper and a hot air outlet are arranged at the discharge end; a motor is arranged on the top of the hopper, the driving shaft of the motor is connected with a rotating shaft, a stirring rod is arranged on the rotating shaft, an outlet is arranged at the bottom of the hopper, the outlet is located above the uppermost belt conveyor, and the hopper is located on one side of the discharge outlet of the filter pressing box and is connected with the filter pressing box through the discharge outlet.

[0015] Preferably, two crushing rollers are arranged in the discharge hopper.

[0016] Preferably, a material guide plate is provided above the pulverizing roller.

[0017] Preferably, there are three belt conveyors, which are belt conveyor one, belt conveyor two and belt conveyor three from top to bottom. The loading end of belt conveyor two exceeds the unloading end of belt conveyor one, and the loading end of belt conveyor three exceeds the unloading end of belt conveyor two.

[0018] Preferably, except for the lowest belt conveyor, electric heating rods are provided at the unloading ends of the remaining belt conveyors.

[0019] Preferably, there are several hot air inlets arranged on the top of the shell.

[0020] Preferably, a heating insulation layer is provided on the side wall of the material mixing hopper, and an electric heating wire is provided in the heating insulation layer.

[0021] Preferably, induced draft fans are respectively provided at the hot air inlet and the hot air outlet.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The VOCs catalyst drying device of the utility model first performs a filter press treatment before formally drying, and filters out most of the liquid in the VOCs catalyst, thereby facilitating the subsequent drying process, improving the drying efficiency, and achieving the effect of energy saving. At the same time, the VOCs catalyst after filter press is stirred and broken up by the stirring rod in the material mixing hopper to prevent the VOCs catalyst after filter press from agglomerating, ensuring that it is evenly distributed before entering the shell, and can be spread more loosely and evenly on the belt conveyor below, so that the hot air can evaporate the liquid in the VOCs catalyst and further improve the drying efficiency. In addition, the utility model also uses a number of belt conveyors to transport the VOCs catalyst while drying it, so that it is evenly heated during the transportation process, ensuring the uniformity of the drying effect; at the same time, through the reasonable layout of the material mixing hopper and the discharge hopper, the continuous drying of the VOCs catalyst is achieved, and the production efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the VOCs catalyst drying device of the utility model.

[0025] In the figure, 1. filter press box; 2. feed hopper; 3. filter plate; 4. vibrator; 5. cylinder; 6. pressure plate; 7. liquid outlet; 8. discharge port; 9. shell; 10. hot air inlet; 11. material hopper; 12. discharge hopper; 13. hot air outlet; 14. motor; 15. rotating shaft; 16. stirring rod; 17. crushing roller; 18. guide plate; 19. belt conveyor 1; 20. belt conveyor 2; 21. belt conveyor 3; 22. electric heating rod; 23. heating interlayer; 24. induced draft fan. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0027] Example 1

[0028] like Figure 1 As shown, this embodiment provides a VOCs catalyst drying device, including a filter press unit and a drying unit. The VOCs catalyst is first filtered through the filter press unit to filter out the liquid therein, and then enters the drying unit for drying treatment to finally obtain a dry VOCs catalyst.

[0029] Among them, Figure 1As shown, the filter press unit includes a filter press box 1, and a feed hopper 2 is arranged on one side of the filter press box 1, and the VOCs catalyst enters the filter press box 1 from the feed hopper 2. A filter plate 3 is arranged obliquely in the filter press box 1, and the filter plate 3 is located at the bottom of the feed hopper 2 and is provided with a vibrator 4; a cylinder 5 is arranged on the top of the filter press box 1, and the piston rod of the cylinder 5 faces downward and is connected to a pressing plate 6, which is adapted to the filter plate 3; a liquid outlet 7 is arranged at the bottom of the filter press box 1, and a discharge port 8 is arranged on the side of the filter press box 1 opposite to the feed hopper 2, and the discharge port 8 is located at the filter plate 3. After the VOCs catalyst enters the filter press box 1, it moves along the inclined filter plate 3, and then the cylinder 5 is started to drive the pressing plate 6 to squeeze the VOCs catalyst downward, so that the liquid therein is pressed out through the filter plate 3, and the filtered liquid is discharged through the liquid outlet 7 at the bottom and collected uniformly; the vibrator 4 is started, and the VOCs catalyst after filtering moves to the discharge port 8 under the vibration action of the vibrator 4, completing the filter pressing treatment of the VOCs catalyst.

[0030] like Figure 1 As shown, the drying unit includes a housing 9, and three belt conveyors are installed in the housing 9 from top to bottom, namely, belt conveyor 1 19, belt conveyor 2 20 and belt conveyor 3 21. The feeding end of belt conveyor 2 20 exceeds the feeding end of belt conveyor 1, and the feeding end of belt conveyor 3 21 exceeds the feeding end of belt conveyor 2 20. A plurality of hot air inlets 10 are arranged on the top of the housing 9, and a hopper 11 is arranged on the feeding end of the housing 9, and a discharge hopper 12 and a hot air outlet 13 are arranged on the discharge end. An induced draft fan 24 is arranged at the hot air inlet 10 and the hot air outlet 13; a motor 14 is arranged on the top of the hopper 11, and a rotating shaft 15 is connected to the driving shaft of the motor 14, and a stirring rod 16 is arranged on the rotating shaft 15. An outlet is arranged at the bottom of the hopper 11, and the outlet is located above the belt conveyor 1. The hopper 11 is located on one side of the discharge port 8 of the filter press box 1 and is connected to the filter press box 1 through the discharge port 8.

[0031] The material mixing hopper 11 of the drying unit is connected to the filter press box 1 of the filter press unit through the discharge port 8. The VOCs catalyst after the filter press enters the material mixing hopper 11 through the discharge port 8. The motor 14 is started to drive the rotating shaft 15 to rotate. The stirring rod 16 stirs the VOCs catalyst to break it up, so that it falls on the belt conveyor 19 and is spread on it more evenly and loosely, which is convenient for drying. The VOCs catalyst is transported on three belt conveyors in turn. During this process, hot air is blown to it through the hot air inlet 10 to further evaporate the liquid therein, so as to achieve the purpose of drying. Finally, the dried VOCs catalyst falls from the unloading end of the belt conveyor 3 21 into the discharge hopper 12 below and is collected uniformly; and the hot air is discharged from the drying unit through the hot air outlet 13.

[0032] In addition, in order to further improve the drying efficiency of the drying unit, as Figure 1As shown, in addition to the belt conveyor 3 21, the unloading ends of the belt conveyor 1 19 and the belt conveyor 2 20 are both provided with electric heating rods 22. The electric heating rods 22 further heat the space inside the shell 9, which can compensate for the heat loss after the hot air enters the shell 9, ensure the drying temperature inside the shell 9, and thus improve the drying efficiency.

[0033] Working principle:

[0034] The VOCs catalyst to be dried enters the filter press box 1 from the feed hopper 2 and falls on the inclined filter plate 3. Then, the cylinder 5 drives the pressing plate 6 to squeeze the VOCs catalyst downward. The liquid in the VOCs catalyst flows out from the liquid outlet 7 after passing through the filter plate 3. The VOCs catalyst after filtration enters the hopper 11 through the outlet 8 under the vibration of the vibrator 4. The motor 14 is started to drive the stirring rod 16 on the rotating shaft 15 to rotate, and the VOCs catalyst entering the hopper 11 is stirred and dispersed. Then, the VOCs catalyst falls on the belt conveyor 19 below through the outlet at the bottom, and is transported on the belt conveyor 19, and falls from the unloading end of the belt conveyor 19 to the loading end of the belt conveyor 2 20 below; then, the VOCs catalyst is transported on the belt conveyor 2 20, and falls from the unloading end to the loading end of the belt conveyor 3 21 below, and falls into the discharge hopper 12 below after being transported to the unloading end, and finally collected together. During the conveying process of the VOCs catalyst, the hot air blown into the housing 9 from the hot air inlet 10 dries the VOCs catalyst, thereby completing the drying process of the VOCs catalyst.

[0035] Example 2

[0036] On the basis of Example 1, Figure 1 As shown, two crushing rollers 17 are arranged in the discharge hopper 12, and the two crushing rollers 17 rotate in opposite directions to crush the VOCs catalysts falling into the discharge hopper 12 for subsequent processing. In addition, in order to ensure that all VOCs catalysts entering the discharge hopper 12 are crushed, a guide plate 18 can be arranged above the crushing rollers 17 so that all VOCs catalysts are gathered between the two crushing rollers 17 to ensure the crushing work is carried out.

[0037] Example 3

[0038] On the basis of Example 1, Figure 1 As shown, a heating interlayer 23 is provided on the side wall of the material mixing hopper 11, and an electric heating wire is provided in the heating interlayer 23. The VOCs catalyst is stirred and heated by the electric heating wire in combination with the stirring rod 16, so that the VOCs catalyst is pre-dried before entering the shell 9, thereby improving the drying efficiency of the VOCs catalyst.

Claims

1. VOCs catalyst drying device, characterized in that: The invention comprises a filter press unit and a drying unit. The filter press unit comprises a filter press box (1). A feed hopper (2) is arranged on one side of the filter press box (1). A filter plate (3) is arranged obliquely in the filter press box (1). The filter plate (3) is located at the bottom of the feed hopper (2) and is provided with a vibrator (4). A cylinder (5) is arranged on the top of the filter press box (1). The piston rod of the cylinder (5) faces downward and is connected to a pressure plate (6). The pressure plate (6) is adapted to the filter plate (3). A liquid outlet (7) is arranged at the bottom of the filter press box (1). A discharge port (8) is arranged on the side of the filter press box (1) opposite to the feed hopper (2). The discharge port (8) is located at the filter plate (3). The drying unit comprises a shell (9). The shell A plurality of belt conveyors are sequentially installed in the housing (9) from top to bottom; a hot air inlet (10) is provided on the housing (9) and a material mixing hopper (11) is provided at the feeding end of the housing (9); a material discharging hopper (12) and a hot air outlet (13) are provided at the discharging end; a motor (14) is provided at the top of the material mixing hopper (11); a driving shaft of the motor (14) is connected to a rotating shaft (15); a stirring rod (16) is provided on the rotating shaft (15); an outlet is provided at the bottom of the material mixing hopper (11); the outlet is located above the uppermost belt conveyor; and the material mixing hopper (11) is located on one side of the material discharging port (8) of the filter press box (1) and is connected to the filter press box (1) through the material discharging port (8).

2. The VOCs catalyst drying device according to claim 1, characterized in that: Two crushing rollers (17) are arranged in the discharge hopper (12).

3. The VOCs catalyst drying device according to claim 2, characterized in that: A material guide plate (18) is provided above the crushing roller (17).

4. The VOCs catalyst drying device according to claim 1, characterized in that: The belt conveyors are provided with three belt conveyors, which are belt conveyor 1 (19), belt conveyor 2 (20) and belt conveyor 3 (21) from top to bottom. The loading end of belt conveyor 2 (20) exceeds the unloading end of belt conveyor 1, and the loading end of belt conveyor 3 (21) exceeds the unloading end of belt conveyor 2 (20).

5. The VOCs catalyst drying device according to claim 1, characterized in that: Except for the lowest belt conveyor, the unloading ends of the remaining belt conveyors are all provided with electric heating rods (22).

6. The VOCs catalyst drying device according to claim 1, characterized in that: A plurality of hot air inlets (10) are provided and arranged on the top of the shell (9).

7. The VOCs catalyst drying device according to claim 1, characterized in that: A heating insulation layer (23) is provided on the side wall of the material mixing hopper (11), and an electric heating wire is provided in the heating insulation layer (23).

8. The VOCs catalyst drying device according to claim 1, characterized in that: An induced draft fan (24) is provided at the hot air inlet (10) and the hot air outlet (13), respectively.

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