Waste gas treatment device for environment-friendly printing

Abstract

The utility model discloses a waste gas treatment device for environment-friendly printing, which relates to the technical field of waste gas treatment and comprises a filter box, two ends of the filter box are respectively communicated with a gas inlet pipe and a dehumidification mechanism, the lower surface of the filter box is communicated with a recovery unit, a filter unit is arranged in the filter box, and the dehumidification mechanism is communicated with an activated carbon adsorption mechanism. The activated carbon adsorption mechanism communicates with a sterilization and disinfection mechanism, and the sterilization and disinfection mechanism communicates with a detection mechanism. The device has the beneficial effects that primary separation of large-particle materials and waste gas is achieved through the spiral blade mechanism, and the burden of a filter screen is relieved; the multi-stage arc-shaped filter screen with gradually-decreased pore diameters is used for fine and graded filtration, centrifugal force generated by matched rotation of the arc-shaped filter screen facilitates falling of filtered particles, the filter screen can slide and deform through a spring and a limiting sliding rail, the cleaning effect is enhanced, the filter screen is cleaned through a brush mechanism and an air spraying pipe, the filter screen is effectively prevented from being blocked, and the service life of the filter screen is prolonged. The waste gas treatment efficiency and quality are improved.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, and in particular to an environmentally friendly waste gas treatment device for printing. Background Technology

[0002] The printing, drying, and cleaning processes of cardboard boxes generate organic waste gas, primarily from printing ink. Whether in the printing process itself or in the subsequent drying and cleaning, the organic solvents in the ink produce a large amount of harmful waste gas. This waste gas has a detrimental effect on human health and the environment, and therefore must be purified to meet emission standards. Activated carbon waste gas treatment devices can effectively purify the waste gas generated during the printing process.

[0003] A search revealed that Chinese patent application CN119607789A discloses an environmentally friendly waste gas treatment device for cardboard box printing. It mainly uses two adsorption mechanisms to replace activated carbon without stopping the machine, thereby reducing the dispersion of waste gas.

[0004] Compared with existing technologies in related fields, it can be seen that most existing treatment devices use fixed filters. The particulate matter being filtered can easily clog the filters, which limits the effectiveness of the filters in separating and filtering particulate matter in the exhaust gas. Furthermore, clogged filters are not easy to clean, which greatly affects the efficiency and quality of exhaust gas treatment. Utility Model Content

[0005] The purpose of this invention is to provide an environmentally friendly waste gas treatment device for printing in order to solve the above-mentioned problems.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] An environmentally friendly waste gas treatment device for printing includes a filter box, with an air inlet pipe and a dehumidification mechanism connected to both ends of the filter box, a recovery unit connected to the lower surface of the filter box, a filtration unit installed inside the filter box, an activated carbon adsorption mechanism connected to the dehumidification mechanism, a sterilization and disinfection mechanism connected to the activated carbon adsorption mechanism, a detection mechanism connected to the sterilization and disinfection mechanism, and an exhaust pipe installed on the detection mechanism.

[0008] The filtration unit includes a main shaft, a filter screen, and a spring. A motor is mounted on the side of the filter box. The main shaft is rotatably mounted inside the filter box and is connected to the output shaft of the motor. A spiral blade mechanism, a fixed rod, and a stop are mounted on the part of the main shaft located inside the filter box. The filter screen is mounted on the fixed rod and is slidably mounted on the main shaft at its center. The filter screen is arc-shaped and arranged in a manner with gradually decreasing pore size. A spring is sleeved on the main shaft and is located at the air outlet end of the filter screen. The two ends of the spring are connected to the filter screen and the stop, respectively.

[0009] Furthermore, a limit slide rail is installed on the main shaft, which is slidably connected to the filter screen and connected to the baffles on both sides of the filter screen.

[0010] Furthermore, the recycling unit includes a collection box and a collection trough. The collection box is installed on the lower surface of the filter box and is connected to the filter box through the collection trough, which is located below the spiral blade mechanism and the filter screen.

[0011] Furthermore, a brush mechanism is installed inside the filter screen, and the brush mechanism is located in the air inlet direction of the filter screen.

[0012] Furthermore, an air jet pipe is installed inside the filter screen. The air jet pipe is located at the air outlet end of the filter screen, and the air outlet direction of the air jet pipe is towards the filter screen and opposite to the airflow direction inside the filter box.

[0013] Furthermore, a flow stabilizing pipe is installed inside the filter box. The flow stabilizing pipe has large openings at both ends and a small opening in the middle. The flow stabilizing pipe is located between the filter screen and the spiral blade mechanism, and the center position of the flow stabilizing pipe corresponds to the main shaft.

[0014] Furthermore, pressure sensors are installed on both sides of the inside of the filter box, located at both ends of the filter screen.

[0015] The advantages compared to existing technologies are as follows:

[0016] 1. The spiral blade mechanism achieves initial separation of large particles from waste gas, reducing the burden on the filter screen. The multi-stage arc-shaped filter screen with decreasing pore size performs fine and graded filtration, effectively intercepting particles of different sizes and improving overall filtration efficiency. The arc-shaped filter screen, combined with the centrifugal force generated by rotation, facilitates the shedding of filtered particles. Springs and limit rails allow the filter screen to slide and deform, enhancing the cleaning effect. The brush mechanism and air jet pipe clean the filter screen, effectively preventing filter screen blockage, extending filter screen service life, and improving the efficiency and quality of waste gas treatment.

[0017] 2. During operation, the flow rate and direction of the exhaust gas are adjusted by the flow stabilizer pipe to ensure that it contacts the filter screen smoothly and evenly, reducing the impact of the airflow on the filter screen, thus protecting the filter screen and improving filtration efficiency and uniformity. Attached Figure Description

[0018] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a first isometric structural schematic diagram of an environmentally friendly waste gas treatment device for printing according to the present invention;

[0020] Figure 2 This is a partial cross-sectional structural diagram of an environmentally friendly waste gas treatment device for printing as described in this utility model;

[0021] Figure 3 This utility model describes an environmentally friendly waste gas treatment device for printing. Figure 2 Enlarged structural diagram at point A in the middle;

[0022] Figure 4 This utility model describes an environmentally friendly waste gas treatment device for printing. Figure 2 Enlarged structural diagram at point B;

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the filter box and flow stabilizing pipe of the environmentally friendly waste gas treatment device for printing described in this utility model;

[0024] Figure 6 This utility model describes an environmentally friendly waste gas treatment device for printing. Figure 5 Enlarged structural diagram at point C.

[0025] The annotations in the attached figures are explained as follows:

[0026] 1. Filter box; 2. Air inlet pipe; 301. Motor; 302. Main shaft; 303. Spiral blade mechanism; 304. Fixing rod; 305. Filter screen; 306. Stop block; 307. Spring; 308. Limiting slide rail; 4. Dehumidification mechanism; 5. Activated carbon adsorption mechanism; 6. Sterilization and disinfection mechanism; 7. Detection mechanism; 8. Collection box; 9. Collection tank; 10. Brush mechanism; 11. Jet pipe; 12. Flow stabilizing pipe; 13. Pressure sensor. Detailed Implementation

[0027] like Figures 1-6As shown, an environmentally friendly waste gas treatment device for printing includes a filter box 1. An air inlet pipe 2 and a dehumidification mechanism 4 are fixedly connected to both ends of the filter box 1. A recovery unit is fixedly connected to the lower surface of the filter box 1. A filtration unit is installed inside the filter box 1. The dehumidification mechanism 4 is fixedly connected to an activated carbon adsorption mechanism 5. The activated carbon adsorption mechanism 5 is fixedly connected to a sterilization and disinfection mechanism 6. The sterilization and disinfection mechanism 6 is fixedly connected to a detection mechanism 7. An exhaust pipe is fixedly installed on the detection mechanism 7. The air inlet pipe 2 connects to a ventilation duct in the workshop. Waste gas from the printing production process in the workshop enters the filter box 1 through the ventilation duct and the air inlet pipe 2. The filtration unit treats the particulate matter in the waste gas, achieving preliminary treatment of the waste gas and reducing the particulate matter content. The waste gas is then treated by collecting and processing the particulate matter filtered out by the filtration unit through the recovery unit. The filtered waste gas then enters the dehumidification unit 4 for dehumidification to reduce the water content in the waste gas. The dried waste gas then enters the activated carbon adsorption unit 5, where the odor and small particulate impurities in the waste gas are absorbed and treated. The gas after adsorption treatment enters the sterilization and disinfection unit 6 for sterilization and disinfection. The sterilized and disinfected waste gas is then discharged to the testing unit 7 for testing. The treated waste gas that passes the test is discharged through the exhaust pipe. The testing unit 7 can determine the effect of the waste gas treatment, ensure the effectiveness of the waste gas treatment, and avoid the pollution of the environment caused by the emission of unqualified waste gas.

[0028] like Figure 2 , Figure 3 , Figure 5 , Figure 6As shown, the filtration unit includes a main shaft 302, a filter screen 305, and a spring 307. A motor 301 is fixedly mounted on the side of the filter box 1. The main shaft 302 is rotatably mounted inside the filter box 1 and is fixedly connected to the output shaft of the motor 301. A spiral blade mechanism 303, a fixing rod 304, and a stop block 306 are fixedly mounted on the portion of the main shaft 302 located inside the filter box 1. A filter screen 305 is fixedly mounted on the fixing rod 304. The center position of the filter screen 305 is slidably mounted on the main shaft 302. The filter screen 305 is arc-shaped and arranged in a manner where the aperture of the arranged filter screens gradually decreases. The spring 307 is sleeved on the main shaft 302. On the 02, spring 307 is located at the air outlet end of filter screen 305. The two ends of spring 307 are connected to filter screen 305 and stop block 306 respectively. Spiral blade mechanism 303 is close to air inlet pipe 2. Motor 301 drives main shaft 302 to rotate. Main shaft 302 drives spiral blade mechanism 303, fixed rod 304 and stop block 306 to rotate synchronously. After the exhaust gas enters the filter box 1, the exhaust gas first contacts the rotating spiral blade mechanism 303. Under the pushing action of spiral blade mechanism 303, the exhaust gas makes spiral motion. Through the centrifugal force of rotation, large particles in the exhaust gas are thrown towards the inner wall of filter box 1 and slide along the inner wall of filter box 1. The waste gas falls into the recycling unit for collection, achieving initial separation of large particles from the waste gas, reducing the burden on filter screen 305 during filtration, and protecting filter screen 305. After initial separation, the waste gas moves onto filter screen 305, where particles of different sizes are intercepted at different rates by the arranged filter screen 305, achieving fine and graded filtration, reducing the pressure on individual filter screens 305. Because filter screen 305 is curved, it reduces the adhesion of particles to filter screen 305. At the same time, filter screen 305 can rotate during filtration, using the centrifugal force of rotation to shake the filtered particles, making it easier for the filtered particles to fall off. The filter screen 305 performs self-cleaning, reducing the accumulation of filtered particles. Simultaneously, as the filter screen 305 rotates, its center slides along the main shaft 302 due to the impact of airflow. Meanwhile, the spring 307 provides cushioning and restoring force when the filter screen 305 is impacted or cleaned by particles. This allows some areas of the filter screen 305 to twist and deform during filtration, facilitating better removal and dislodging of filtered particles, reducing their accumulation on the filter screen 305, ensuring the quality and efficiency of particulate filtration in the exhaust gas, and improving the overall efficiency of exhaust gas treatment.

[0029] like Figure 3 As shown, a limiting slide rail 308 is fixedly installed on the main shaft 302. The limiting slide rail 308 is slidably connected to the filter screen 305. The limiting slide rail 308 is fixedly connected to the baffles 306 on both sides of the filter screen 305. When treating exhaust gas, the filter screen 305 will rotate and slide. The limiting slide rail 308 limits and guides the filter screen 305, thereby improving the stability of the filter screen 305.

[0030] like Figure 1 , Figure 2 , Figure 5 As shown, the recycling unit includes a collection box 8 and a collection trough 9. The collection box 8 is fixedly installed on the lower surface of the filter box 1. The collection box 8 is connected to the filter box 1 through the collection trough 9. The collection trough 9 is located below the spiral blade mechanism 303 and the filter screen 305. The collection box 8 is connected to an external waste treatment device. During the waste gas treatment process, large particles separated from the spiral blade mechanism 303 and particles cleaned off by the filter screen 305 fall into the filter box 1 and then slide down the inner wall of the filter box 1 to the collection trough 9. The waste is then discharged into the collection box 8 through the collection trough 9 for collection. The external waste treatment device extracts the waste collected in the collection box 8, which facilitates centralized cleaning of the waste and improves the convenience and efficiency of waste treatment.

[0031] like Figure 3 , Figure 5 As shown, a brush mechanism 10 is fixedly installed inside the filter screen 305. The brush mechanism 10 is located in the air inlet direction of the filter screen 305. When the filter screen 305 rotates, the brush mechanism 10 contacts the surface of the filter screen 305 and cleans the filter screen 305 by brushing off the particles attached to the filter screen 305. Under the action of centrifugal force, the particles are removed from the filter screen 305 and fall into the collection tank 9 for cleaning, reducing the accumulation of particles on the filter screen 305 and ensuring the filtration effect of the filter screen 305.

[0032] like Figure 2 , Figure 3 As shown, a jet pipe 11 is fixedly installed inside the filter screen 305. The jet pipe 11 is located at the air outlet end of the filter screen 305, and the air outlet direction of the jet pipe 11 is towards the filter screen 305 and opposite to the airflow direction inside the filter box 1. The jet pipe 11 is connected to an external electrostatic fan. During operation, the external electrostatic fan delivers electrostatic ion air into the jet pipe 11, and it is sprayed onto the filter screen 305 through the air holes on the jet pipe 11. The electrostatic ion air removes static electricity from the filter screen 305, reducing the increase in particulate matter adsorption caused by static electricity during the waste gas treatment process. At the same time, the gas sprayed from the jet pipe 11 back-blown the filter screen 305, back-blowing the particulate matter in the filter holes of the filter screen 305, causing the particulate matter blocking the filter holes to fall off, completing the cleaning of the filter screen 305, reducing the clogging of the filter screen 305, and ensuring the filtration effect and speed of the filter screen 305 for waste gas.

[0033] like Figure 2 , Figure 5 , Figure 4As shown, a flow stabilizing pipe 12 is fixedly installed inside the filter box 1. The flow stabilizing pipe 12 has large openings at both ends and a small opening in the middle. The flow stabilizing pipe 12 is located between the filter screen 305 and the spiral blade mechanism 303. The center position of the flow stabilizing pipe 12 corresponds to the main shaft 302. During operation, the exhaust gas driven by the spiral blade mechanism 303 enters the flow stabilizing pipe 12. Due to the structure of the flow stabilizing pipe 12 with large openings at both ends and a small opening in the middle, the airflow speed and direction are adjusted when the exhaust gas passes through the flow stabilizing pipe 12. The exhaust gas changes from turbulent to stable and uniform. After the airflow stabilizes, it flows out onto the filter screen 305, ensuring that the exhaust gas can contact the filter screen 305 with a stable flow rate and uniform distribution. This reduces the impact force of the airflow on the filter screen 305, thereby protecting the filter screen 305 and effectively improving the filtration efficiency and quality of the filter screen 305.

[0034] like Figure 4 , Figure 5 As shown, pressure sensors 13 are fixedly installed on both sides of the inside of the filter box 1. The pressure sensors 13 are located at both ends of the filter screen 305. During the filtration of exhaust gas, the pressure difference between the two ends of the filter screen 305 is monitored in real time by the pressure sensors 13. As particles accumulate on the filter screen 305, the resistance during filtration increases, and the pressure difference will change at any time. By monitoring the pressure change, the staff can promptly grasp the clogging status of the filter screen 305, facilitate timely treatment of the filter screen 305, ensure effective filtration of particles in exhaust gas and stable operation of the device, and improve filtration effect and efficiency.

[0035] Working principle: such as Figures 1-3 , Figure 5 , Figure 6 As shown, the exhaust gas from the printing production process in the workshop enters the filter box 1 through the air guide pipe and the air inlet pipe 2. The motor 301 drives the main shaft 302 to rotate, and the main shaft 302 drives the spiral blade mechanism 303 to rotate. The exhaust gas makes a spiral motion under the pushing action of the spiral blade mechanism 303. Large particles in the exhaust gas are thrown towards the inner wall of the filter box 1 and slide down into the collection tank 9 along the inner wall of the filter box 1. They are then discharged into the collection box 8 through the collection tank 9 for collection, thus achieving the initial separation of large particles in the exhaust gas.

[0036] like Figures 2-5 As shown, the pre-separated exhaust gas enters the flow stabilizing pipe 12. The flow stabilizing pipe 12 adjusts the airflow speed and direction of the exhaust gas, so that the exhaust gas flows smoothly onto the filter screen 305. The filter screen 305, which is arranged in a row, intercepts particles of different sizes, thus achieving fine and graded filtration.

[0037] like Figure 2 , Figure 3 , Figure 5As shown, when the filter screen 305 rotates, under the impact of the airflow, the centrifugal force during rotation, and the supporting force of the spring 307, the filter screen 305 undergoes sliding deformation and the filtered particles fall off. At the same time, the brush mechanism 10 cleans the rotating filter screen 305, brushing off the particles attached to the filter screen 305. Meanwhile, an external electrostatic fan delivers electrostatic ion air into the jet pipe 11 and sprays it onto the filter screen 305 through the air holes on the jet pipe 11, thus completing the cleaning of the filter screen 305 and preventing the filter screen 305 from clogging.

[0038] like Figure 1 , Figure 2 As shown, the filtered exhaust gas enters the dehumidification unit 4 for dehumidification to reduce the water content in the exhaust gas. The dried exhaust gas enters the activated carbon adsorption unit 5, where the odor and small particulate impurities in the exhaust gas are absorbed and treated. The gas after adsorption treatment enters the sterilization and disinfection unit 6 for sterilization and disinfection treatment. The sterilized and disinfected exhaust gas is then discharged to the testing unit 7 for testing. The treated exhaust gas that passes the test is discharged through the exhaust pipe.

[0039] like Figure 4 , Figure 5 As shown, the pressure difference between the two ends of the filter screen 305 is monitored in real time by the pressure sensor 13. By monitoring the pressure change, the staff can promptly grasp the clogging status of the filter screen 305 and facilitate timely treatment of the filter screen 305.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An environmentally friendly waste gas treatment device for printing, characterized in that, Includes a filter box (1), with an air inlet pipe (2) and a dehumidification mechanism (4) connected to both ends of the filter box (1), a recovery unit connected to the lower surface of the filter box (1), a filtration unit provided inside the filter box (1), an activated carbon adsorption mechanism (5) connected to the dehumidification mechanism (4), a sterilization and disinfection mechanism (6) connected to the activated carbon adsorption mechanism (5), a detection mechanism (7) connected to the sterilization and disinfection mechanism (6), and an exhaust pipe installed on the detection mechanism (7); The filtration unit includes a main shaft (302), a filter screen (305), and a spring (307). A motor (301) is mounted on the side of the filter box (1). The main shaft (302) is rotatably mounted inside the filter box (1). The main shaft (302) is connected to the output shaft of the motor (301). A spiral blade mechanism (303), a fixing rod (304), and a stop (306) are mounted on the portion of the main shaft (302) located inside the filter box (1). A fixing rod (304) is mounted on the fixing rod (304). A filter screen (305) is provided, and the center of the filter screen (305) is slidably mounted on the main shaft (302). The filter screen (305) is arc-shaped and arranged in a manner in which the aperture of the filter screens (305) gradually decreases. A spring (307) is sleeved on the main shaft (302) and is located at the air outlet end of the filter screen (305). The two ends of the spring (307) are respectively connected to the filter screen (305) and the stop block (306).

2. The environmentally friendly waste gas treatment device for printing according to claim 1, characterized in that: A limiting slide rail (308) is installed on the main shaft (302), the limiting slide rail (308) is slidably connected to the filter screen (305), and the limiting slide rail (308) is connected to the stops (306) on both sides of the filter screen (305).

3. The environmentally friendly waste gas treatment device for printing according to claim 1, characterized in that: The recycling unit includes a collection box (8) and a collection trough (9). The collection box (8) is installed on the lower surface of the filter box (1). The collection box (8) is connected to the filter box (1) through the collection trough (9). The collection trough (9) is located below the spiral blade mechanism (303) and the filter screen (305).

4. The environmentally friendly waste gas treatment device for printing according to claim 1, characterized in that: A brush mechanism (10) is installed inside the filter screen (305), and the brush mechanism (10) is located in the air inlet direction of the filter screen (305).

5. The environmentally friendly waste gas treatment device for printing according to claim 1, characterized in that: An air jet pipe (11) is installed inside the filter screen (305). The air jet pipe (11) is located at the air outlet end of the filter screen (305). The air outlet direction of the air jet pipe (11) is towards the filter screen (305) and is opposite to the airflow direction inside the filter box (1).

6. The environmentally friendly waste gas treatment device for printing according to claim 1, characterized in that: The filter box (1) is equipped with a flow stabilizing pipe (12). The flow stabilizing pipe (12) has large openings at both ends and a small opening in the middle. The flow stabilizing pipe (12) is located between the filter screen (305) and the spiral blade mechanism (303). The center position of the flow stabilizing pipe (12) corresponds to the main shaft (302).

7. The environmentally friendly waste gas treatment device for printing according to claim 1, characterized in that: Pressure sensors (13) are installed on both sides of the inside of the filter box (1), and the pressure sensors (13) are located at both ends of the filter screen (305).

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