Printing waste gas treatment device

Abstract

The invention relates to a printing waste gas treatment device and belongs to the technical field of waste gas treatment. The device comprises a dust collection box, a cyclone separation cylinder, a supporting seat, a gas storage box, a treatment box body, an adsorption mechanism, an intake and exhaust distribution pipe and an exhaust pipeline, the top of the dust collection box is communicated with a plurality of cyclone separation cylinders, the interior of the treatment box body is divided into three mounting cavities through partition plates, an adsorption mechanism containing an activated carbon adsorption plate, a desorption assembly, an overturning assembly and a driving device is arranged in each mounting cavity, and the mounting cavities are divided into a treatment cavity, an overturning cavity, a desorption cavity and a cooling cavity through cross partition plates. Printing waste gas enters the cyclone separation cylinder through the gas inlet pipeline to be dedusted and then is fed into the treatment box body through the gas inlet distribution pipe, and VOCs are adsorbed through the activated carbon adsorption plate; after adsorption is saturated, the driving device drives the overturning assembly to overturn the activated carbon adsorption plate, and the desorption assembly heats air through waste heat of the boiler to achieve reverse desorption. The device realizes effective cooperative treatment of dust and VOCs, saves energy, reduces consumption and is convenient to maintain, and emission meets the environmental protection standard.

Description

Technical Field

[0001] This invention belongs to the field of waste gas treatment technology and relates to a printing waste gas treatment device. Background Technology

[0002] The printing industry generates a large amount of waste gas containing volatile organic compounds (VOCs), ink dust, and odors during the production process. These waste gases mainly come from processes such as ink thinner volatilization and printing plate cleaning. Among them, VOCs include toxic and harmful substances such as benzene, toluene, and ethyl acetate, which not only cause serious pollution to the surrounding atmospheric environment but also endanger the health of operators. Therefore, the treatment of printing waste gas to meet standards has become a key link in the sustainable development of the printing industry.

[0003] Currently, the commonly used printing waste gas treatment technologies in the industry mainly include a combination process of "pretreatment + core purification + exhaust gas emission". Among them, pretreatment mostly adopts cyclone dust removal or filter filtration, while core purification mainly uses activated carbon adsorption, adsorption-desorption + catalytic combustion. However, there are still many problems that need to be solved in the existing technologies: If activated carbon becomes saturated and is not treated in time, it can cause VOCs to leak through. Single adsorption technology cannot completely decompose VOCs, but can only transfer pollutants, which can easily cause secondary pollution. In some adsorption-desorption devices, the desorption gas flow and activated carbon are not in uniform contact, resulting in incomplete desorption, which further affects the overall treatment effect. Summary of the Invention

[0004] This invention aims to provide a simplified printing waste gas treatment device, addressing the problems of incomplete dust removal and high desorption costs in existing technologies. It achieves effective synergy between dust removal and adsorption processes through optimization. During the development process, VOCs pollution in the waste gas was first analyzed, and cyclone separation was employed to ensure dust removal. Simultaneously, to address energy consumption, a waste heat desorption design was introduced to promote energy-efficient operation. This design originates from the treatment requirements and forms a reliable solution.

[0005] This invention aims to address key problems in existing printing waste gas treatment technologies, including incomplete separation of dust and VOCs in the waste gas leading to low adsorption efficiency, high and uneven energy consumption during desorption, and operational interruptions caused by inconvenient equipment maintenance. To this end, this invention provides a printing waste gas treatment device that achieves synergistic purification of waste gas through an integrated design of dust removal, adsorption, tumbling, desorption, and cooling. The research and development approach stems from a systematic analysis of the entire printing waste gas treatment process: First, addressing the issues of dust clogging the adsorption medium and uneven VOCs adsorption, a purification system based on cyclone separation and activated carbon adsorption was developed through component screening and process experiments. Second, based on the flow characteristics of the waste gas and the requirements for thermal desorption, supporting devices were designed to ensure seamless integration of dust pretreatment and adsorption / desorption, thereby maximizing the synergistic potential of each component and avoiding overall failure caused by a single dominant link in traditional devices. This approach emphasizes a closed-loop path from problem diagnosis to solution verification, forming a reliable technical solution from waste gas composition analysis to device optimization.

[0006] Specifically, the traditional waste gas treatment method was first evaluated, revealing that insufficient dust separation accelerates adsorption medium saturation, while incomplete desorption leads to VOC residue and secondary pollution. To address this, multiple cyclone separators were introduced as pretreatment units, combined with a dust collection box to form a dust collection system: the cyclone separators use centrifugal force to separate dust from the airflow, and the dust collects in the conical dust collection box under gravity, preventing blockage in subsequent adsorption stages; simultaneously, activated carbon adsorption plates, as the core purification component, are combined with cross-shaped and layered partitions to form a multi-chamber structure: the cross-shaped partitions divide the installation chamber into four independent chambers for treatment, rotation, desorption, and cooling, ensuring that each process does not interfere with the others. The synergistic effect of each component is reflected in: the dust removal effect of the cyclone separators provides clean airflow for adsorption; the honeycomb structure of the activated carbon adsorption plates enhances VOC capture capacity; the rotation component allows switching between the front and back of the adsorption plates to optimize the desorption path; the desorption component uses boiler waste heat to heat the air, promoting efficient VOC release; and the cooling chamber restores the activity of the adsorption plates to support recycling. By conducting multiple process simulations (such as adjusting the cavity division and airflow direction), the optimal component configuration is determined to ensure a balance between dust removal and VOCs removal, while also being compatible with existing boiler systems to reduce external dependence.

[0007] Based on the characteristics of the aforementioned components, a dedicated treatment device was designed to meet the requirements of high dust and VOC content in the exhaust gas. The core of the device lies in achieving precise pretreatment, uniform adsorption, and efficient regeneration of the exhaust gas, avoiding the waste of component potential due to process defects.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a printing waste gas treatment device, comprising a dust collection box installed on the ground, wherein a plurality of cyclone separators are connected to the top of the dust collection box, the air inlets of the plurality of cyclone separators are connected to the same air inlet pipe, and the air outlets of the plurality of cyclone separators are connected to the same air inlet distribution pipe. A support base is installed on the ground, and two gas storage boxes are fixed on the top of the support base. The top of the gas storage boxes is connected to a processing box. The air inlet distribution pipe is located between the two processing boxes. The processing box is divided into three installation chambers by two partition plates. The top of the processing box is sealed by multiple sealing covers. An adsorption mechanism is installed in the installation chamber. The adsorption mechanism includes an activated carbon adsorption plate, which adsorbs VOCs in the waste gas. The adsorption mechanism also includes a desorption component, which treats the activated carbon adsorption plate. An exhaust distribution pipe is fixedly installed below the intake distribution pipe and connected to the air storage tank via a pipe. The exhaust end of the exhaust distribution pipe is connected to an exhaust pipe.

[0009] Furthermore, the adsorption mechanism includes two cross-shaped partitions fixedly disposed within the installation cavity. The cross-shaped partitions divide the installation cavity into a processing cavity, a tilting cavity, a desorption cavity, and a cooling cavity. A layered partition is fixedly disposed between the two cross-shaped partitions. The layered partition is located below the air inlet and its exhaust port is connected to the processing cavity. The layered partition contains four activated carbon adsorption plates. The processing cavity below is connected to the gas storage tank through a pipe. A rotating shaft is provided through the top of the cross-shaped partition above, and the activated carbon adsorption plates are all connected to the rotating shaft. A drive motor is fixedly provided on the top of the sealing cover, and the output end of the drive motor is connected to the rotating shaft to drive the activated carbon adsorption plates to rotate and change. The adsorption mechanism also includes a flipping component and a driving device. The driving device drives the flipping component to flip the saturated activated carbon adsorption plate to ensure that the desorption component moves in the opposite direction to the exhaust gas flow.

[0010] Furthermore, the desorption assembly includes a connecting cylinder that is fixedly installed through the top of the sealing cover plate. The bottom end of the connecting cylinder is connected to the desorption chamber. A heat exchange pipe is fixedly mounted on the outer wall of the connecting cylinder and wound around it. Both ends of the heat exchange pipe are connected to the heat exchanger of the boiler through conveying pipes, so as to heat the air inside the connecting cylinder using the heat of the boiler. An axial flow fan is fixedly installed on the top of the connecting cylinder, so as to blow the heated air toward the activated carbon adsorption plate using the axial flow fan. One side of each of the three desorption chambers is connected to the combustion chamber of the boiler through connecting pipes, so as to treat the desorbed VOCs by combustion in the boiler.

[0011] Furthermore, the flipping assembly is disposed within the flipping cavity and includes a support frame rotatably disposed within the layered partition. Rotating shafts I are rotatably disposed at each of the four corners of the support frame. The activated carbon adsorption plate is fixed to the outer end of rotating shaft I. Rotating shaft II is rotatably disposed on one side of the layered partition. A U-shaped clamp is fixed to one end of rotating shaft II, the U-shape of which is adapted to the thickness of the activated carbon adsorption plate. The other end of rotating shaft II extends to the outside of the processing chamber. A limiting member for limiting the position of the activated carbon adsorption plate is also provided on one side of the support frame.

[0012] Furthermore, the limiting component includes a mounting cavity formed on one side of the support frame, a positioning pin slidably disposed in the mounting cavity, a return spring disposed in the mounting cavity, the two ends of the return spring respectively abutting against one side inner wall of the mounting cavity and one end of the positioning pin, and a limiting groove for cooperating with the positioning pin is formed on one side of the activated carbon adsorption plate.

[0013] Furthermore, the driving device includes a servo motor fixedly mounted on the outside of the processing box. A mounting base corresponding to the rotating shaft II is fixedly mounted on one side of the processing box. A transmission shaft is rotatably mounted through one side of the mounting base. The transmission shaft is connected to the outer end of the rotating shaft II via a universal coupling. Multiple transmission shafts are connected to the output end of the servo motor.

[0014] Furthermore, a driven shaft is rotatably provided through one side of the mounting base. The outer walls of the drive shaft and the driven shaft are respectively fixedly fitted with meshing driven gears and driving gears. A connecting bracket is fixedly fitted on the outer end of the driven shaft. The same transmission rod is rotatably provided inside multiple connecting brackets. A transmission rod is fixedly fitted on the output end of the servo motor. The other end of the transmission rod is rotatably connected to the transmission rod with the same linkage rod.

[0015] Furthermore, the bottom of the dust collection box is conical, and a valve body is provided at the bottom of the dust collection box. A rotating rod is rotatably provided inside the valve body, and a valve core plate located inside the valve body is fixed on the outer wall of the rotating rod. The rotating rod is L-shaped, and a counterweight is fixedly sleeved on the other end of the rotating rod. The counterweight is used to drive the valve core plate to flip up and seal the valve body.

[0016] The beneficial effects of this invention are as follows: The advantage of this invention lies in the deep synergy between components and devices: dust pretreatment provides the foundation for adsorption, the chamber division and flipping mechanism optimizes the circulation process, and waste heat desorption is integrated with the boiler to reduce energy consumption. The combination of these two aspects makes waste gas purification more thorough and sustainable. At the same time, the modular structure, such as the sealing cover plate (61) and flange connection, facilitates maintenance and reduces the risk of failure. This solution is reliable in practical applications, avoids the inefficiency problems of traditional technologies, and ensures the normality and scalability of the technical solution.

[0017] The printing exhaust gas treatment device disclosed in this invention pre-treats the exhaust gas through multiple evenly distributed cyclone separators, effectively separating dust from the exhaust gas using centrifugal force. The dust collects in a conical dust collection box under gravity, effectively preventing the subsequent adsorption mechanism from being blocked by dust and ensuring adsorption efficiency. The adsorption mechanism uses honeycomb activated carbon adsorption plates, whose sufficient specific surface area can effectively capture VOCs in the exhaust gas. Combined with four independent chambers for treatment, flipping, desorption, and cooling, divided by a cross-shaped baffle, the activated carbon adsorption plates can be circulated. The adsorbed VOCs are then desorbed by the desorption component and introduced into the boiler combustion chamber for high-temperature decomposition. Ultimately, the VOCs removal rate and dust removal rate in the exhaust gas are greatly improved, and the emission concentration meets relevant environmental protection standards, completely solving the problem of printing exhaust gas pollution. 3. The printing waste gas treatment device disclosed in this invention can directly utilize the waste heat of the existing boiler in the factory to heat the air through heat exchange pipes, which greatly reduces energy consumption; the high-concentration VOCs generated by desorption are directly fed into the boiler combustion chamber for combustion treatment, without the need to set up a separate incineration device, making full use of existing equipment resources and reducing equipment investment costs; the activated carbon adsorption plate can be recycled for adsorption operations after being flipped, desorbed, and cooled, without the need for frequent replacement, which significantly reduces the cost of adsorbent consumables and avoids secondary pollution caused by waste adsorbents. 4. The printing waste gas treatment device disclosed in this invention achieves automatic dust discharge through the cooperation of a counterweight and a valve core plate at the bottom of the dust collection box, eliminating the need for frequent manual cleaning of the dust collection box and reducing maintenance workload. The treatment box adopts a sealing design with a sealing cover and a high-temperature resistant sealing gasket, and sealing gaskets are installed at each pipe interface to effectively prevent waste gas leakage and ensure a safe operating environment. The adsorption mechanism is driven by a drive motor, a servo motor, gears, connecting rods, and other transmission components to achieve automated operation. The fixing and flipping of the activated carbon adsorption plate are precisely achieved through a structure such as a positioning pin, a return spring, and a U-shaped clamp, ensuring smooth and reliable transmission and reducing the failure rate. The device adopts a modular structure with bolt fixing and flange connection, which is convenient for disassembly and assembly, and simplifies subsequent maintenance and component replacement, further reducing maintenance difficulty and cost.

[0018] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1This is a three-dimensional structural schematic diagram of a printing waste gas treatment device according to the present invention; Figure 2 This is a schematic diagram of the bottom structure of the dust collection box of a printing waste gas treatment device according to the present invention; Figure 3 This is a schematic cross-sectional view of the valve body of a printing waste gas treatment device according to the present invention; Figure 4 This is a schematic diagram of the gas storage box and treatment box structure of a printing waste gas treatment device according to the present invention; Figure 5 for Figure 4 Another perspective structural diagram; Figure 6 This is a schematic diagram of the inlet and outlet distribution pipe structure of a printing waste gas treatment device according to the present invention; Figure 7 This is a cross-sectional view of the treatment box of a printing waste gas treatment device according to the present invention. Figure 8 This is a schematic diagram of the activated carbon adsorption plate installation structure of a printing waste gas treatment device according to the present invention. Figure 9 This is a cross-sectional view of the support frame structure of a printing waste gas treatment device according to the present invention. Figure 10 for Figure 4 Enlarged structural diagram of section A in the middle; Figure 11 for Figure 5 Enlarged structural diagram of section B.

[0020] Reference numerals: 1. Dust collection box; 2. Cyclone separator; 3. Inlet pipe; 4. Support base; 5. Air storage box; 6. Processing box; 601. Connecting pipe; 61. Sealing cover; 62. Divider plate; 63. Cross-shaped partition; 64. Processing chamber; 65. Tilting chamber; 66. Desorption chamber; 67. Cooling chamber; 68. Layered partition; 69. Activated carbon adsorption plate; 691. Limiting groove; 71. Support frame; 711. Mounting chamber; 712. Return spring; 713. Positioning pin; 72. Rotating shaft I; 73. Rotating shaft II; 74. U-shaped clamp; 7. Exhaust pipe 8. Drive motor; 9. Desorption assembly; 91. Connecting cylinder; 92. Heat exchange pipe; 93. Axial flow fan; 94. Conveying pipe; 10. Drive unit; 101. Servo motor; 102. Transmission rod; 103. Linkage rod; 104. Mounting base; 105. Driven shaft; 106. Connecting bracket; 107. Transmission rod; 108. Transmission shaft; 109. Driven gear; 110. Drive gear; 11. Valve body; 111. Rotating rod; 112. Valve core plate; 113. Counterweight; 12. Inlet distribution pipe; 13. Exhaust distribution pipe; 14. Connection port. Detailed Implementation

[0021] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0022] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0023] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. Example

[0024] like Figure 1-11As shown, a printing exhaust gas treatment device is disclosed in this embodiment. This device is suitable for the synergistic treatment of VOCs and dust in low-to-medium concentration printing exhaust gas. The entire device is installed on the floor of the printing workshop, with each component fixed by bolts or connected by pipe flanges to ensure structural stability and sealing. A dust collection box 1 is placed on a pre-set concrete base on the ground. The bottom of the dust collection box 1 is conical to facilitate dust accumulation at the bottom under gravity. Multiple cyclone separators 2 are connected to the top of the dust collection box 1 via flanges. The multiple cyclone separators 2 are evenly distributed, with appropriate spacing between adjacent ones to ensure uniform air intake and no interference. The air inlets of all cyclone separators 2 are fixedly connected to the same air intake pipe 3 by welding. One end of the air intake pipe 3 is connected to the exhaust gas outlet of the printing equipment via a flexible pipe. The exhaust gas enters the air intake pipe 3 under the action of an induced draft fan. The induced draft fan can adjust the airflow according to the printing conditions to adapt to different exhaust gas emission volumes. All the exhaust ports of the cyclone separators 2 are connected to the same air inlet distribution pipe 12 via flanges. The air inlet distribution pipe 12 has an interface on its wall that corresponds to the exhaust port of the cyclone separator 2. A sealing gasket is installed at the interface to prevent exhaust gas leakage.

[0025] The support base 4 is fixed to the ground with expansion bolts. The support base 4 is welded from channel steel, and two air storage boxes 5 are fixed to its top with bolts. The two air storage boxes 5 are symmetrically distributed on both sides of the air inlet distribution pipe 12. The air storage boxes 5 can buffer the exhaust gas flow and balance the air pressure, making subsequent treatment more stable. The top of the air storage box 5 is connected to the treatment box 6 through a flange. The air inlet distribution pipe 12 is horizontally set between the two treatment boxes 6. The pipe wall has a connection port 14 corresponding to the air inlet of the treatment box 6. A butterfly valve is installed on the connection port 14 to adjust the air intake. The treatment box 6 is divided into three independent installation chambers by two vertically set partition plates 62. The top of the treatment box 6 is sealed by multiple sealing cover plates 61. The sealing cover plates 61 are bolted to the top edge of the treatment box 6, and a high-temperature resistant sealing gasket is set at the connection. The sealing gasket is made of fluororubber to ensure the sealing of the installation chamber.

[0026] Each installation chamber is equipped with an adsorption mechanism, which includes an activated carbon adsorption plate 69 made of honeycomb activated carbon. This structure provides sufficient specific surface area for effective adsorption of VOCs in the waste gas. The adsorption mechanism also includes two cross-shaped baffles 63 fixedly installed in the installation chamber. The two cross-shaped baffles 63 are horizontally fixed at the upper and lower parts of the installation chamber, respectively, dividing the installation chamber into four independent chambers: a treatment chamber 64, a tilting chamber 65, a desorption chamber 66, and a cooling chamber 67. Each chamber has its own function and does not interfere with the others. A layered baffle 68 is fixedly welded between the two cross-shaped baffles 63. The layered baffle 68 is horizontally positioned below the air inlet of the treatment chamber 6. The air inlet of the treatment chamber 6 is located on the upper part of the side wall and connects to the connection port 14 of the air inlet distribution pipe 12. The exhaust port is located on the lower part of the side wall and connects to the treatment chamber 64. An annular groove is provided inside the layered partition 68, and four reusable activated carbon adsorption plates 69 are installed in the annular groove. The treatment chamber 64 below is connected to the gas storage box 5 through a pipe to ensure that the waste gas after adsorption treatment flows smoothly into the gas storage box 5.

[0027] A rotating shaft is installed at the top center of the cross-shaped partition 63 located above. The rotating shaft is connected to the cross-shaped partition 63 through a bearing. The tops of the four activated carbon adsorption plates 69 are all connected to the rotating shaft. The top of the sealing cover 61 is fixed with a drive motor 8 through a motor bracket. The output end of the drive motor 8 is connected to the rotating shaft through a coupling. The drive motor 8 drives the rotating shaft to rotate, thereby driving the four activated carbon adsorption plates 69 to rotate and change synchronously in the four chambers, realizing the cycle of adsorption, flipping, desorption and cooling.

[0028] The adsorption mechanism also includes a flipping assembly disposed within the flipping chamber 65 and a drive device 10 mounted on the outside of the treatment chamber 6. The flipping assembly is used to flip the saturated activated carbon adsorption plate 69, ensuring that the hot air blown out by the desorption assembly 9 moves in the opposite direction to the previous exhaust gas flow, thereby improving the desorption efficiency. The flipping assembly includes a support frame 71 rotatably disposed within the layered partition 68. The support frame 71 is a rectangular frame structure connected to a rotating shaft and adapted to the annular groove of the layered partition 68. Each of the four corners of the support frame 71 is provided with a rotating shaft I 72 via bearings. The activated carbon adsorption plate 69 is fixed to the outer end of the rotating shaft I 72 by bolts, allowing the activated carbon adsorption plate 69 to flip around the rotating shaft I 72. Furthermore, the cavity walls of the treatment chamber 64, the flipping chamber 65, the desorption chamber 66, and the cooling chamber 67 are all provided with sealing gaskets at the points where they contact the activated carbon adsorption plate 69, which can prevent exhaust gas from crossing over without affecting the flipping of the activated carbon adsorption plate 69. A rotating shaft II 73 is provided on one side of the layered partition 68 via a bearing. The rotating shaft II 73 is arranged parallel to the support frame 71. A U-shaped clamp 74 is welded and fixed to one end of the rotating shaft II 73. The opening width of the U-shaped clamp 74 is the same as the thickness of the activated carbon adsorption plate 69, which can be tightly locked onto the edge of the activated carbon adsorption plate 69. The other end of the rotating shaft II 73 extends through the side wall of the treatment box 6 to the outside. The extended end is connected to the side wall of the treatment box 6 via a bearing to ensure smooth rotation.

[0029] One side of the support frame 71 is also provided with a limiting component for limiting the activated carbon adsorption plate 69. The limiting component includes a mounting cavity 711 opened on one side of the support frame 71, a positioning pin 713 slidably arranged in the mounting cavity 711, and a return spring 712 arranged in the mounting cavity 711. The two ends of the return spring 712 abut against the inner wall of one side of the mounting cavity 711 and one end of the positioning pin 713, respectively. One side of the activated carbon adsorption plate 69 is provided with a limiting groove 691 that cooperates with the positioning pin 713. When the activated carbon adsorption plate 69 is in the adsorption or desorption state, the positioning pin 713 is embedded in the limiting groove 691 under the elastic force of the return spring 712, thereby fixing the activated carbon adsorption plate 69 and preventing the activated carbon adsorption plate 69 from flipping due to excessive airflow.

[0030] The drive unit 10 includes a servo motor 101 bolted to the outside of the processing housing 6. A mounting base 104, corresponding to the rotating shaft II 73, is bolted to one side of the processing housing 6. The mounting base 104 is made of cast iron and has an L-shaped structure. A drive shaft 108 is rotatably mounted through one side of the mounting base 104. The drive shaft 108 is connected to the outer end of the rotating shaft II 73 via a universal coupling. The universal coupling can compensate for installation errors and ensure smooth power transmission. A driven shaft 105 is also rotatably mounted on one side of the mounting base 104 via a bearing. A driven gear 109 and a driving gear 110 are respectively keyed to the outer walls of the drive shaft 108 and the driven shaft 105. Through the meshing transmission of the driven gear 109 and the driving gear 110, the drive shaft 108 can rotate synchronously 360° when the driven shaft 105 rotates 180°. The outer end of the driven shaft 105 is fixedly fitted with a connecting bracket 106 by welding. The connecting bracket 106 has a U-shaped structure, and multiple connecting brackets 106 are rotatably connected to the same transmission rod 107 via pins. The output end of the servo motor 101 is fixedly fitted with a transmission rod 102 via a key. The other end of the transmission rod 102 and the transmission rod 107 are rotatably connected to the same linkage rod 103 via pins, ensuring flexible angle adjustment during transmission.

[0031] The desorption assembly 9 includes a connecting cylinder 91 that is fixedly installed on the top of the sealing cover plate 61. Its bottom end is connected to the desorption chamber 66 via a flange. The outer wall of the connecting cylinder 91 is fixed with clamps and has a heat exchange pipe 92 wound around it. The heat exchange pipe 92 is in full contact with the connecting cylinder 91. Both ends of the heat exchange pipe 92 are connected to the heat exchangers of the existing boiler in the factory via conveying pipes 94. The waste heat generated by the boiler heats the air inside the connecting cylinder 91 to meet the activated carbon desorption requirements. An axial flow fan 93 is bolted to the top of the connecting cylinder 91, which can evenly blow the heated air onto the activated carbon adsorption plate 69 to achieve the desorption operation. One side of each of the three desorption chambers 66 is connected to the boiler combustion chamber via a connecting pipe 601. The high-concentration VOCs generated during desorption enter the boiler combustion chamber through the connecting pipe 601, where they are burned and decomposed into CO2 and H2O at high temperature, avoiding secondary pollution. A heating wire can be installed inside the connecting cylinder 91, and the temperature of the heating wire is controlled by a controller, enabling precise temperature control.

[0032] The exhaust distribution pipe 13 is fixedly installed below the intake distribution pipe 12 by a bracket, and the two are arranged parallel to each other. The exhaust distribution pipe 13 is connected to two air storage tanks 5 through a connection port 14. A check valve is installed on the connection port 14 to prevent the exhaust gas from flowing back. The exhaust end of the exhaust distribution pipe 13 is connected to an exhaust pipe 7 through a flange, and its top extends to the roof of the workshop to ensure that the treated exhaust gas meets the emission standards and the emission concentration meets the relevant standards.

[0033] A valve body 11 is connected to the bottom of the dust collection box 1 via a flange. A rotating rod 111, L-shaped in shape, is rotatably mounted inside the valve body 11 via bearings. A valve core plate 112, located inside the valve body 11, is welded to the outer wall of the rotating rod 111. The valve core plate 112 is a circular steel plate with rubber sealing rings at its edges to ensure a tight seal. A counterweight 113 is fixedly mounted on the other end of the rotating rod 111 via a key. Under normal conditions, the valve core plate 112 flips upwards and fits tightly against the inner wall of the valve body 11, sealing the valve body 11. When the dust in the dust collection box 1 accumulates to a certain weight, the weight of the dust overcomes the weight of the counterweight 113, driving the valve core plate 112 to flip downwards. The dust is then discharged from the valve body 11 into the collection bag. After the dust is discharged, the counterweight 113 automatically resets the valve core plate 112, achieving automatic dust discharge.

[0034] The working process of the device is as follows: Printing exhaust gas enters multiple cyclone separators 2 through the inlet pipe 3 under the action of the induced draft fan. The exhaust gas rotates in the cyclone separator 2, and the dust is thrown against the cylinder wall under the action of centrifugal force and slides down the cylinder wall into the dust collection box 1. The dust in the exhaust gas after cyclone separation is effectively removed. The dust-removed exhaust gas is distributed to the installation cavities of the two treatment boxes 6 through the inlet distribution pipe 12. After entering from the inlet, the exhaust gas passes through the treatment cavity 64 and through the activated carbon adsorption plate 69 in the layered partition 68. The VOCs in the exhaust gas are captured by the activated carbon adsorption plate 69. The exhaust gas after adsorption treatment flows into the gas storage box 5 through the pipe. The exhaust gas in the gas storage box 5 is collected and enters the exhaust distribution pipe 13, and finally discharged through the exhaust pipe 7 to meet the standards.

[0035] When the activated carbon adsorption plate 69 is saturated, the drive motor 8 drives the rotating shaft to rotate, moving the saturated activated carbon adsorption plate 69 into the tilting cavity 65. At this time, the servo motor 101 starts, driving the transmission rod 102 to rotate. The transmission rod 102 drives the transmission rod 107 to move through the linkage rod 103. The transmission rod 107 drives multiple connecting brackets 106 to swing synchronously. The connecting brackets 106 drive the driven shaft 105 to rotate. The driven shaft 105 drives the transmission rod 105 to rotate through the meshing of the drive gear 110 and the driven gear 109. The rotating shaft 108 rotates, and the transmission shaft 108 drives the rotating shaft II 73 to rotate through the universal coupling. The rotating shaft II 73 drives the U-shaped clamp 74 to rotate, and the U-shaped clamp 74 drives the activated carbon adsorption plate 69 to rotate around the rotating shaft I 72. During the rotation, the positioning pin 713 compresses the return spring 712 under the pressure of the activated carbon adsorption plate 69 and exits the limiting groove 691. After the rotation is completed, the positioning pin 713 is embedded in the new limiting groove 691 under the elastic force of the return spring 712, thereby fixing the activated carbon adsorption plate 69.

[0036] The drive motor 8 rotates the shaft, causing the flipped activated carbon adsorption plate 69 to rotate into the desorption chamber 66. The axial flow fan 93 starts, blowing air heated by the heat exchange pipe 92 onto the activated carbon adsorption plate 69. The hot air makes full contact with the activated carbon adsorption plate 69, causing the VOCs adsorbed on the activated carbon to desorb. The high-concentration VOCs generated during desorption enter the boiler combustion chamber for combustion treatment through the connecting pipe 601. After desorption, the activated carbon adsorption plate 69 rotates into the cooling chamber 67, where it naturally cools to room temperature. Then, it rotates again into the treatment chamber 64 for adsorption operations, achieving a cycle of adsorption-desorption.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A printing exhaust gas treatment device, characterized by, Include: The dust collecting box (1) is arranged on the ground, and a plurality of cyclone separation cylinders (2) are communicated at the top of the dust collecting box (1), a same air inlet pipe (3) is fixedly connected to the air inlets of the plurality of cyclone separation cylinders (2), and a same air distribution pipe (12) is fixedly connected to the air outlets; A support base (4) is fixedly arranged on the ground, two gas storage tanks (5) are fixedly arranged at the top of the support base (4), and the top of the gas storage tank (5) is communicated with a treatment box body (6), and the air distribution pipe (12) is located between the two treatment box bodies (6); The treatment box body (6) is divided into three installation cavities by two partition plates (62), and the top is sealed by a plurality of sealing cover plates (61), the installation cavity is provided with an adsorption mechanism, the adsorption mechanism comprises activated carbon adsorption plates (69) and a desorption assembly (9), waste gas enters the cyclone separation cylinder (2) after dust removal through the air inlet pipe (3), enters the treatment box body (6) through the air distribution pipe (12), is adsorbed by the activated carbon adsorption plate (69), and is desorbed by the desorption assembly (9). An exhaust gas distribution pipe (13) is fixed below the air distribution pipe (12), the exhaust gas distribution pipe (13) is communicated with the gas storage tank (5) through a pipeline, and an exhaust pipe (7) is fixedly connected to the exhaust end.

2. The printed waste gas treatment device according to claim 1, characterized by The adsorption mechanism further comprises two cross-shaped partition plates (63) fixedly arranged in the installation cavity, the cross-shaped partition plates (63) divide the installation cavity into a treatment cavity (64), a turnover cavity (65), a desorption cavity (66) and a cooling cavity (67); Two cross-shaped partition plates (63) are fixedly arranged with layered partition plates (68), the layered partition plates (68) are located below the air inlet, the exhaust port is communicated with the treatment cavity (64), and the layered partition plates (68) are provided with four activated carbon adsorption plates (69); the lower treatment cavity (64) is communicated with the gas storage tank (5) through a pipeline; The top of the upper cross-shaped partition plate (63) is rotatably provided with a rotating shaft, the activated carbon adsorption plates (69) are fixedly connected with the rotating shaft, the top of the sealing cover plate (61) is fixedly provided with a driving motor (8), the output end of the driving motor (8) is fixedly connected with the rotating shaft, and the activated carbon adsorption plates (69) are driven to rotate and exchange in the four cavities; The adsorption mechanism further comprises a turnover assembly and a driving device (10), the driving device (10) drives the turnover assembly to overturn the saturated activated carbon adsorption plate (69), so that the hot gas flow of the desorption assembly (9) and the waste gas flow are in reverse contact.

3. The printed waste gas treatment device according to claim 2, characterized by The desorption assembly (9) comprises a connecting cylinder (91) fixedly arranged at the top of the sealing cover plate (61), the bottom end of the connecting cylinder (91) is communicated with the desorption cavity (66), and heat exchange pipes (92) are fixedly arranged on the outer wall of the connecting cylinder (91); The heat exchange pipes (92) are connected with a boiler heat exchanger through conveying pipes (94) at both ends, air in the connecting cylinder (91) is heated by using boiler waste heat, and an axial flow fan (93) is fixedly arranged at the top of the connecting cylinder (91).

4. The printed waste gas treatment device according to claim 2, characterized by The turnover assembly is arranged in the turnover cavity (65), comprising a support frame (71) rotatably arranged in a layered partition plate (68), a rotating shaft I (72) is arranged at each corner of the support frame (71), and the activated carbon adsorption plate (69) is fixedly arranged at the outer end of the rotating shaft I (72); One side of the layered partition plate (68) is rotatably provided with a rotating shaft II (73), one end of the rotating shaft II (73) is fixedly provided with a U-shaped clamping piece (74), the U-shaped clamping piece (74) is matched with the thickness of the activated carbon adsorption plate (69), and the other end extends to the outside of the treatment box (6); One side of the support frame (71) is provided with a limiting piece for limiting the activated carbon adsorption plate (69).

5. The printed waste gas treatment device according to claim 4, characterized by The limiting piece comprises a mounting cavity (711) opened in one side of the support frame (71), a positioning pin (713) is slidably arranged in the mounting cavity (711), and a reset spring (712) is arranged; The two ends of the reset spring (712) respectively abut against the inner wall of the mounting cavity (711) and one end of the positioning pin (713), one side of the activated carbon adsorption plate (69) is provided with a limiting groove (691) matched with the positioning pin (713), and the positioning pin (713) is embedded in the limiting groove (691) under the action of the reset spring (712) to realize fixation.

6. The printed waste gas treatment device according to claim 5, characterized by The driving device (10) comprises a servo motor (101) fixedly arranged on the outside of the treatment box (6), and a mounting base (104) corresponding to the rotating shaft II (73) is fixedly arranged on one side of the treatment box (6); A transmission shaft (108) is rotatably arranged on one side of the mounting base (104), the transmission shaft (108) is connected with the outer end of the rotating shaft II (73) through a universal coupling, and a plurality of transmission shafts (108) are connected with the output end of the servo motor (101) through a transmission structure.

7. The printed waste gas treatment device according to claim 6, characterized by A driven shaft (105) is rotatably arranged on one side of the mounting base (104), and a driven gear (109) and a driving gear (110) engaged with each other are fixedly arranged on the outer walls of the transmission shaft (108) and the driven shaft (105) respectively; A connecting bracket (106) is fixedly arranged on the outer end of the driven shaft (105), and a same transmission rod (107) is rotatably arranged in a plurality of connecting brackets (106); A transmission rod (102) is fixedly arranged on the output end of the servo motor (101), and a same linkage rod (103) is rotatably arranged between the other end of the transmission rod (102) and the transmission rod (107).

8. The printing exhaust treatment device according to any one of claims 1 to 7, characterized in that The bottom of the dust collecting box (1) is conical, and a valve body (11) is fixedly arranged at the bottom, and an L-shaped rotating rod (111) is rotatably arranged in the valve body (11); A valve core plate (112) is fixedly arranged on the outer wall of the rotating rod (111) in the valve body (11), and a balance weight (113) is fixedly arranged at the other end of the rotating rod (111), the balance weight (113) drives the valve core plate (112) to turn up and seal the valve body (11).

9. The printed exhaust gas treatment device of claim 3, wherein, One side of each of the three desorption cavities (66) is connected with the boiler combustion chamber through a connecting pipeline (601), and the high-concentration VOCs generated by desorption enter the boiler combustion chamber through the connecting pipeline (601).

10. The printed exhaust gas treatment device of claim 4, wherein, The cavity wall of the processing cavity (64), the turnover cavity (65), the desorption cavity (66) and the cooling cavity (67) is provided with a sealing gasket at the joint with the activated carbon adsorption plate (69).

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