A printing press volatile organic compound emission treatment device

Abstract

The application relates to a volatile organic compound emission treatment device of a printing machine, and belongs to the technical field of emission treatment devices.The device comprises an air inlet pipe, one side of the air inlet pipe is provided with a switching assembly for switching the air direction of volatile organic compounds, and the side, away from the air inlet pipe, of the switching assembly is provided with a treatment assembly for treating the volatile organic compounds.The application has the beneficial effect that when the zeolite molecular sieve in one of the treatment boxes tends to be saturated, the piston rod of the electric push rod can be retracted to drive the rack to slide on the switching box, thereby driving the gear and the rotating shaft to rotate, making the rotating seat rotate in the circular groove, and then switching to another unsaturated treatment assembly through the L-shaped air switching groove, so that the saturated zeolite molecular sieve can be replaced and treated under the continuous operation state of the equipment, thereby avoiding the time loss caused by shutdown, and significantly improving the continuity and production efficiency of the printing operation.

Description

Technical Field

[0001] This application relates to the field of emission treatment devices, and in particular to a device for treating volatile organic compound emissions from a printing press. Background Technology

[0002] During the printing industry, printing presses emit volatile organic compounds (VOCs) during operation. These pollutants mainly originate from solvent-based inks, dampening solutions, cleaning agents, and other auxiliary materials used in the printing process. The core components are benzene compounds, alcohols, esters, and ketones. This not only exacerbates environmental problems such as ozone pollution and PM2.5 exceeding standards, but also endangers the health of operators. Therefore, it is necessary to purify these pollutants through emission treatment devices to meet environmental emission standards.

[0003] A search revealed a Chinese patent (authorization announcement number CN206508752U) disclosing a volatile organic compound (VOC) emission treatment device for printing machines, comprising: a gas collection device, an adsorption device, a desorption fan, a catalytic cracking device, and an emission device; the gas collection device is connected to the printing machine; the adsorption device is connected to the gas collection device; the adsorption device includes: a first exhaust pipe, a second exhaust pipe, and a zeolite molecular sieve disposed therein; the first exhaust pipe is connected to the desorption fan; the second exhaust pipe is connected to the emission device; the desorption fan is connected to the catalytic cracking device and cooperates with the second exhaust pipe to introduce the desorbed gas into the catalytic cracking device; the catalytic cracking device is connected to the emission device; the emission device is connected to the external environment for discharging the treated gas. This patented technology can fully adsorb the VOCs gas emitted from printing machinery and discharge qualified gas.

[0004] The electric heater in the above-mentioned device heats and burns the concentrated VOCs gas to achieve preliminary purification, while the zeolite molecular sieve re-adsorbs the gas after combustion to ensure that the final emission gas meets the standards. However, this technology has obvious defects: during the adsorption of VOCs and ionic substances, the adsorption capacity of the zeolite molecular sieve will gradually approach saturation with the use time. Once saturated, the staff needs to shut down the entire treatment device and printing machine to replace the zeolite molecular sieve and carry out subsequent treatment, which will force the interruption of the production process, resulting in a lot of labor time loss and affecting the continuity of printing operations and production efficiency. Utility Model Content

[0005] In view of the above-mentioned problems existing in the prior art, the main objective of this application is to provide a device for treating volatile organic compound emissions from printing presses.

[0006] The technical solution of this application is as follows: a printing press volatile organic compound emission treatment device, including an air inlet pipe, a switching component for switching the airflow direction of volatile organic compounds is provided on one side of the air inlet pipe, a treatment component for treating volatile organic compounds is provided on the side of the switching component away from the air inlet pipe, and an opening and closing component for cutting off the flow of the pipeline is provided on the side of the treatment component away from the switching component.

[0007] In a preferred embodiment, the switching assembly includes a switching box fixedly connected to one end of the intake pipe. The switching box is made of transparent glass. Connecting pipes are fixedly connected to both sides of the switching box. A circular groove is opened inside the switching box. A rotating seat is rotatably installed inside the circular groove. An L-shaped ventilation groove that cooperates with the connecting pipe is opened inside the rotating seat. The end of the connecting pipe near the rotating seat is in contact with the outer wall of the rotating seat.

[0008] By adopting the above technical solution, it is possible to switch to another set of unsaturated processing components through the L-shaped ventilation duct, allowing staff to replace and process saturated zeolite molecular sieves while the equipment is running continuously.

[0009] In a preferred embodiment, the switching assembly further includes a rotating shaft rotatably connected to the top of the switching box. The bottom of the rotating shaft extends into the interior of the circular groove and is fixedly connected to the rotating seat. A gear is fixedly connected to the outer periphery of the rotating shaft. An electric push rod is fixedly installed on the top of the switching box. A rack is fixedly connected to the piston rod of the electric push rod, and the rack meshes with the gear.

[0010] By adopting the above technical solution, the extension and retraction of the piston rod of the electric push rod drives the rack to slide on the switching box, thereby driving the gear and the rotating shaft to rotate, so that the rotating seat rotates in the circular groove.

[0011] In a preferred embodiment, the processing assembly includes processing boxes disposed on both sides of the switching box, an inner box being fixedly connected inside the processing box, a concrete insulation layer filling the gap between the processing box and the inner box, three activated carbon filters being snapped into the interior of the inner box, and support members being fixedly connected to both sides of the inner wall of the inner box.

[0012] By adopting the above technical solution and setting up an activated carbon filter, particulate impurities and some VOCs in the exhaust gas can be adsorbed.

[0013] In a preferred embodiment, the processing assembly further includes a zeolite molecular sieve installed between the tops of the two supports, an electric heater fixedly installed on the inner wall of the inner chamber, and the end of the connecting pipe away from the switching box extending into the interior of the inner chamber.

[0014] By adopting the above technical solution, the volatile organic compounds can be heated and burned by the electric heater, thereby efficiently decomposing organic pollutants. The pollutants are then deeply adsorbed by zeolite molecular sieves to ensure that the emitted gases consistently meet the standards.

[0015] In a preferred embodiment, the opening and closing assembly includes an air supply pipe fixedly connected to one side of the processing box, a two-part pipe head fixedly connected between the two air supply pipes, an air outlet pipe fixedly connected to the end of the two-part pipe head away from the air supply pipe, and a desorption fan fixedly installed at the end of the air outlet pipe away from the two-part pipe head.

[0016] By adopting the above technical solution, volatile organic compounds can sequentially enter the opening and closing components, the two-way pipe head, and the outlet pipe, and finally be discharged by the desorption fan.

[0017] In a preferred embodiment, the opening and closing assembly further includes a drive motor fixedly installed at the top of the air supply pipe. The output shaft of the drive motor extends into the interior of the air supply pipe and is fixedly connected to a butterfly plate, which is in contact with the inner wall of the air supply pipe.

[0018] By adopting the above technical solution and setting the drive motor, the butterfly plate can be controlled to rotate.

[0019] Compared with the prior art, the advantages and positive effects of this application are as follows: 1. In this application, when the zeolite molecular sieve in one of the processing boxes approaches saturation, the extension and retraction of the piston rod of the electric push rod can drive the rack to slide on the switching box, thereby driving the gear and the rotating shaft to rotate, causing the rotating seat to rotate in the circular groove, and then switching to another unsaturated processing component through the L-shaped ventilation groove. This allows the operator to replace and process the saturated zeolite molecular sieve while the equipment is running continuously, avoiding the loss of working hours caused by downtime, and significantly improving the continuity and production efficiency of printing operations.

[0020] 2. In this application, by setting the drive motor, the butterfly plate can be controlled to rotate, thereby flexibly adjusting the gas flow rate or cutting off a single airflow to meet the processing needs under different working conditions. Attached Figure Description

[0021] Figure 1 This application provides an overall perspective view of a printing press volatile organic compound emission treatment device; Figure 2 This application provides a schematic diagram of the processing components of a printing press volatile organic compound emission treatment device; Figure 3 This application provides a schematic diagram of a switching component for a printing press volatile organic compound emission treatment device; Figure 4This application provides a schematic diagram of the opening and closing components of a printing press volatile organic compound emission treatment device; Figure 5 This application provides a device for treating volatile organic compound emissions from a printing press. Figure 1 Enlarged view of point A in the middle.

[0022] Legend: 1. Inlet pipe; 2. Switching assembly; 21. Switching box; 22. Connecting pipe; 23. Circular groove; 24. Rotating seat; 25. L-shaped ventilation groove; 26. Rotating shaft; 27. Gear; 28. Rack; 29. ​​Electric push rod; 3. Opening and closing assembly; 31. Air supply pipe; 32. Butterfly plate; 33. Drive motor; 34. Two-part pipe head; 35. Outlet pipe; 4. Desorption fan; 5. Processing assembly; 51. Processing box; 52. Concrete insulation layer; 53. Inner box; 54. Activated carbon filter; 55. Support component; 56. Zeolite molecular sieve; 57. Electric heater. Detailed Implementation

[0023] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0024] Reference Figure 1-5 A printing press volatile organic compound emission treatment device includes an air inlet pipe 1. A switching component 2 for switching the direction of volatile organic compound ventilation is provided on one side of the air inlet pipe 1. A treatment component 5 for treating volatile organic compounds is provided on the side of the switching component 2 away from the air inlet pipe 1. An opening and closing component 3 for cutting off the flow of the pipeline is provided on the side of the treatment component 5 away from the switching component 2.

[0025] Specifically, the switching assembly 2 includes a switching box 21 fixedly connected to one end of the air inlet pipe 1. The switching box 21 is made of transparent glass, and connecting pipes 22 are fixedly connected to both sides of the switching box 21. A circular groove 23 is opened inside the switching box 21, and a rotating seat 24 is rotatably installed inside the circular groove 23. An L-shaped ventilation groove 25 that cooperates with the connecting pipes 22 is opened inside the rotating seat 24. When the zeolite molecular sieve 56 in one set of processing boxes 51 approaches saturation, the extension and retraction of the piston rod of the electric push rod 29 drives the rack 28 to slide on the switching box 21, thereby driving the gear 27 and the rotating shaft 26 to rotate, causing the rotating seat 24 to rotate in the circular groove 23, and then switching to another set of unsaturated processing assemblies 5 through the L-shaped ventilation groove 25. This allows the operator to replace and process the saturated zeolite molecular sieve 56 while the equipment is running continuously, avoiding the loss of working hours caused by downtime, and significantly improving the continuity and production efficiency of the printing operation. The end of the connecting pipe 22 near the rotating seat 24 is connected to the rotating seat 24. The outer wall of the 24 is fitted together. The switching assembly 2 also includes a rotating shaft 26 rotatably connected to the top of the switching box 21. The bottom of the rotating shaft 26 extends into the interior of the circular groove 23 and is fixedly connected to the rotating seat 24. A gear 27 is fixedly connected to the outer periphery of the rotating shaft 26. An electric push rod 29 is fixedly installed on the top of the switching box 21. A rack 28 is fixedly connected to the piston rod of the electric push rod 29. The rack 28 meshes with the gear 27. The processing assembly 5 includes processing boxes 51 disposed on both sides of the switching box 21. An inner chamber 53 is fixedly connected inside. The space between the treatment box 51 and the inner chamber 53 is filled with a concrete insulation layer 52. The concrete insulation layer 52 can effectively block heat transfer, ensuring the efficiency of electric heating and avoiding the safety hazards caused by the high temperature of the equipment shell. Three activated carbon filters 54 are snapped into the inside of the inner chamber 53. The activated carbon filters 54 can adsorb particulate impurities and some VOCs in the exhaust gas. Support members 55 are fixedly connected to both sides of the inner wall of the inner chamber 53.

[0026] Specifically, the treatment component 5 also includes a zeolite molecular sieve 56 installed between the tops of the two supports 55. An electric heater 57 is fixedly installed on the inner wall of the inner chamber 53. The electric heater 57 can heat and burn volatile organic compounds, thereby efficiently decomposing organic pollutants. The pollutants are then deeply adsorbed by the zeolite molecular sieve 56 to ensure that the emission gas meets the standards stably. The end of the connecting pipe 22 away from the switching box 21 extends into the interior of the inner chamber 53. The opening and closing component 3 includes an air supply pipe 31 fixedly connected to one side of the treatment box 51, and a two-point pipe is fixedly connected between the two air supply pipes 31. The head 34, the end of the two-way pipe head 34 away from the air supply pipe 31 is fixedly connected to the air outlet pipe 35, and the end of the air outlet pipe 35 away from the two-way pipe head 34 is fixedly installed with the desorption fan 4. The opening and closing assembly 3 also includes a drive motor 33 fixedly installed at the top of the air supply pipe 31. The output shaft of the drive motor 33 extends into the interior of the air supply pipe 31 and is fixedly connected to the butterfly plate 32. By setting the drive motor 33, the butterfly plate 32 can be controlled to rotate, thereby flexibly adjusting the gas flow rate or cutting off a single airflow to meet the processing needs under different working conditions. The butterfly plate 32 is in contact with the inner wall of the air supply pipe 31.

[0027] Working principle: First, volatile organic compounds (VOCs) enter the switching component 2 through the inlet pipe 1. Then, they pass through the L-shaped ventilation groove 25 into the corresponding connecting pipe 22, and then into the corresponding treatment component 5. Here, the electric heater 57 heats and combusts the VOC gas, efficiently decomposing organic pollutants. Further, the zeolite molecular sieve 56 and activated carbon filter 54 work together to achieve deep adsorption, ensuring stable compliance of the emission standards. The VOC gas then sequentially enters the opening and closing component 3, the two-way pipe head 34, and the outlet pipe 35, and is finally discharged by the desorption fan 4. When the zeolite molecular sieve 56 in one of the processing boxes 51 approaches saturation, the electric push rod 29 can be started by controlling the external controller. The extension and retraction of the piston rod of the electric push rod 29 drives the rack 28 to slide on the switching box 21, thereby driving the gear 27 and the rotating shaft 26 to rotate, so that the rotating seat 24 rotates in the circular groove 23. Then, through the L-shaped ventilation groove 25, it switches to another unsaturated processing component 5, so that the staff can replace and process the saturated zeolite molecular sieve 56 while the equipment is running continuously, so as to avoid the loss of working hours caused by downtime and significantly improve the continuity of printing operations and production efficiency.

Claims

1. A printing press volatile organic compound emission treatment apparatus comprising an inlet duct (1) characterised in that: A switching component (2) for switching the ventilation direction of volatile organic compounds is provided on one side of the air intake pipe (1). A processing component (5) for treating volatile organic compounds is provided on the side of the switching component (2) away from the air intake pipe (1). An opening and closing component (3) for cutting off the flow of the pipeline is provided on the side of the processing component (5) away from the switching component (2).

2. A printing press volatile organic compound emission treatment device according to claim 1, wherein: The switching assembly (2) includes a switching box (21) fixedly connected to one end of the air intake pipe (1). The switching box (21) is made of transparent glass. Connecting pipes (22) are fixedly connected to both sides of the switching box (21). A circular groove (23) is opened inside the switching box (21). A rotating seat (24) is rotatably installed inside the circular groove (23). An L-shaped ventilation groove (25) that cooperates with the connecting pipe (22) is opened inside the rotating seat (24). The end of the connecting pipe (22) close to the rotating seat (24) is in contact with the outer wall of the rotating seat (24).

3. A printing press volatile organic compound emission treatment device according to claim 2, wherein: The switching assembly (2) also includes a rotating shaft (26) rotatably connected to the top of the switching box (21). The bottom of the rotating shaft (26) extends into the interior of the circular groove (23) and is fixedly connected to the rotating seat (24). A gear (27) is fixedly connected to the outer periphery of the rotating shaft (26). An electric push rod (29) is fixedly installed on the top of the switching box (21). A rack (28) is fixedly connected to the piston rod of the electric push rod (29). The rack (28) meshes with the gear (27).

4. A printing press volatile organic compound emission treatment device according to claim 2, wherein: The processing component (5) includes processing boxes (51) arranged on both sides of the switching box (21). An inner box (53) is fixedly connected inside the processing box (51). A concrete insulation layer (52) is filled in the gap between the processing box (51) and the inner box (53). Three activated carbon filters (54) are snapped into the inside of the inner box (53). Support members (55) are fixedly connected to both sides of the inner wall of the inner box (53).

5. A printing press volatile organic compound emission treatment device according to claim 4, wherein: The processing assembly (5) also includes a zeolite molecular sieve (56) installed between the tops of the two supports (55), an electric heater (57) is fixedly installed on the inner wall of the inner box (53), and the end of the connecting pipe (22) away from the switching box (21) extends into the interior of the inner box (53).

6. A printing press volatile organic compound emission treatment device according to claim 4, wherein: The opening and closing assembly (3) includes an air supply pipe (31) fixedly connected to one side of the processing box (51), a two-way pipe head (34) fixedly connected between the two air supply pipes (31), an air outlet pipe (35) fixedly connected to the end of the two-way pipe head (34) away from the air supply pipe (31), and a desorption fan (4) fixedly installed at the end of the air outlet pipe (35) away from the two-way pipe head (34).

7. A printing press volatile organic compound emission treatment device according to claim 6, characterised in that: The opening and closing assembly (3) also includes a drive motor (33) fixedly installed at the top of the air supply pipe (31). The output shaft of the drive motor (33) extends into the interior of the air supply pipe (31) and is fixedly connected to a butterfly plate (32). The butterfly plate (32) is in contact with the inner wall of the air supply pipe (31).

Images