Environment-friendly digital printing device

Abstract

The utility model relates to the technical field of digital printing, and provides an environment-friendly digital printing device which comprises a rack, a digital printing mechanism arranged on the rack, a drying box and a waste gas collecting and treating device. The waste gas collecting and treating device comprises a controller, an exhaust fan, a particulate matter filtering assembly, a zeolite rotating wheel cylinder, a catalytic combustion tower, a cooling tower, an activated carbon filtering tower and a desorption fan, the exhaust fan is arranged on the drying box, and an air inlet of the exhaust fan penetrates into the top of the drying box to pump hot waste gas generated in the drying box to an inlet of the particulate matter filtering assembly; a filtering outlet of the particulate matter filtering assembly is communicated with a zeolite rotating wheel cylinder gas inlet, a zeolite rotating wheel cylinder gas outlet is communicated with a catalytic combustion tower gas inlet, a catalytic combustion tower gas outlet is communicated with a cooling tower gas inlet, and a cooling tower gas outlet is communicated with an activated carbon filtering tower inlet. The digital printing device solves the problems that waste gas generated by drying of an existing digital printing device is not ideal in treatment and poor in environmental protection property.

Description

Technical Field

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

[0002] In simple terms, the digital printing production process involves inputting various digital patterns—such as scanned images, digital photographs, or computer-generated patterns—into a computer. These patterns are then processed by a computer-aided color separation printing system, and finally, specialized RIP software uses a printing system to directly spray various specialized dyes (reactive, disperse, and acidic main coatings) onto various fabrics or other media. After further processing, high-precision printed products are obtained on various textile fabrics. However, existing printing equipment has certain shortcomings. The printing process generates waste gas, which is directly emitted into the workshop, potentially affecting the health of workers in the long run. Furthermore, the waste gas can enter the environment, causing long-term pollution. Environmentally friendly digital printing equipment, in particular, requires drying the printed products, which often generates high-temperature waste gas. This high temperature can damage activated carbon or catalysts, resulting in inadequate waste gas treatment and poor environmental performance. Therefore, effectively treating the waste gas generated by digital printing equipment is a pressing issue that needs to be addressed. Utility Model Content

[0003] Therefore, in view of the above problems, this utility model proposes an environmentally friendly digital printing device that effectively treats high-temperature waste gas, has a good waste gas treatment effect, and is environmentally friendly.

[0004] To solve this technical problem, this utility model adopts the following solution: an environmentally friendly digital printing device, including a frame, a digital printing mechanism mounted on the frame, and a drying chamber. The drying chamber is located on one side of the digital printing mechanism to dry the products printed by the digital printing mechanism. It also includes a waste gas collection and treatment device, which includes a controller, an exhaust fan, a particulate filter assembly, a zeolite impeller, a catalytic combustion tower, a cooling tower, an activated carbon filter tower, and a desorption fan. The exhaust fan is mounted on the drying chamber, and its inlet extends into the top of the drying chamber to remove heat waste generated inside. Gas is drawn into the inlet of the particulate filter assembly. The filter outlet of the particulate filter assembly is connected to the air inlet of the zeolite rotor. The air outlet of the zeolite rotor is connected to the air inlet of the catalytic combustion tower. The exhaust port of the catalytic combustion tower is connected to the air inlet of the cooling tower. The air outlet of the cooling tower is connected to the inlet of the activated carbon filter tower. The desorption fan is located between the desorption outlet of the activated carbon filter tower and the exhaust gas inlet of the catalytic combustion tower to send the desorbed exhaust gas from the activated carbon filter tower into the catalytic combustion tower for combustion treatment. The exhaust fan, zeolite rotor, catalytic combustion tower, cooling tower and desorption fan are all connected and controlled by a controller.

[0005] In a further improvement, the particulate matter filtration assembly includes a mesh frame and filter cotton. The left and right ends of the mesh frame are the inlet and the outlet, respectively. The filter cotton is filled inside the mesh frame. The exhaust port of the exhaust fan is connected to the inlet of the mesh frame, and the outlet of the mesh frame is connected to the air inlet of the zeolite rotor.

[0006] In a further improvement, the particulate matter filtration assembly also includes a vibration pump and an adsorber. The vibration pump is located inside the grid frame at the top of the grid frame to drive the filter cotton inside the grid frame to vibrate. The adsorber is located inside the grid frame in the area below the inlet of the grid frame and the exhaust port of the exhaust fan. The bottom of the grid frame, below the adsorber, has a dust collection box that communicates with the exhaust port of the adsorber. The front or back of the grid frame has a sealable door that can be opened / closed for removing the filter cotton and cleaning the large particles adsorbed on the filter cotton. Both the vibration pump and the adsorber are connected to and controlled by a controller.

[0007] In a further improvement, the activated carbon filter tower includes a tower body and multiple activated carbon adsorption layers disposed within the tower body, and the inlet of the desorption fan is connected to the desorption port of each activated carbon adsorption layer of the activated carbon filter tower.

[0008] Further improvements include a second exhaust fan, which is located between the cooling tower outlet and the activated carbon filter inlet.

[0009] By adopting the aforementioned technical solution, the beneficial effects of this utility model are as follows: By setting up a waste gas collection and treatment device on the drying box of the digital printing device, the waste gas generated by the drying box is sent by an exhaust fan to a particulate filter to remove ink particles and fiber dust from the waste gas. Then, the waste gas is sent to a zeolite rotor to concentrate the low-concentration waste gas to 5-20 times its original volume and then sent to a catalytic combustion tower for combustion treatment. VOCs are completely decomposed at a high temperature of 800-1000℃. The tail gas and flue gas of the catalytic combustion tower are sent to a cooling tower to cool down to below 40℃ and then sent to an activated carbon filter tower for secondary treatment, thereby enabling the waste gas to meet emission standards. Controlling the flue gas temperature below 40℃ can avoid damaging the activated carbon. The desorption fan is set between the desorption outlet of the activated carbon filter tower and the waste gas inlet of the catalytic combustion tower to send the desorbed waste gas from the activated carbon filter tower into the catalytic combustion tower for combustion treatment, so that the activated carbon filter tower can be reused repeatedly, realizing self-circulation of treatment, effectively treating high-temperature waste gas, with good waste gas treatment effect and good environmental protection. A vibration pump is installed on the mesh frame filled with filter cotton. The vibration can be controlled by setting a timer. An adsorber controlled by the controller is set below the front area. Large particles on the filter cotton are adsorbed into the dust collection box when they fall off due to vibration. This allows the filter cotton to be cleaned regularly, extending the service life of the filter cotton after removal and cleaning. This method can be widely promoted and applied. Attached Figure Description

[0010] Figure 1 This is a partial structural schematic diagram of an embodiment of the present utility model. Detailed Implementation

[0011] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. The digital printing device, zeolite rotor, catalytic combustion tower, cooling tower, and desorption fan are all existing components. Various structures of such components have been disclosed in Chinese patent documents, such as CN202421078053.0 A digital printing device for easy and rapid drying, CN201721123462.8 A digital printing device for silk fabric, CN201821271786.0 A molecular sieve adsorption rotor system for treating waste gas, CN202222786221.9 A waste gas treatment device for enameling machines, CN201920370947.X An organic waste gas treatment device, etc. They will not be described in detail in the following embodiments.

[0012] refer to Figure 1The preferred environmentally friendly digital printing device of this utility model includes a frame 1, a digital printing mechanism 2 mounted on the frame 1, a drying chamber 3, and a waste gas collection and treatment device. The drying chamber 3 is located on one side of the digital printing mechanism 2 to dry the products printed by the digital printing mechanism 2. The waste gas collection and treatment device includes a controller, multiple solenoid valves, an exhaust fan 4, a particulate filter assembly 5, a zeolite rotor 6, a catalytic combustion tower 7, a cooling tower 8, a second exhaust fan 9, an activated carbon filter tower 10, and a desorption fan 11. The exhaust fan 4 is mounted on the drying chamber 3, and its air inlet penetrates through the top of the drying chamber 3 to draw the hot waste gas generated inside the drying chamber 3 to the inlet of the particulate filter assembly 5. A solenoid valve is installed between the exhaust port of the exhaust fan 4 and the inlet of the particulate filter assembly 5. The particulate filter assembly 5 includes a mesh frame 51, filter cotton 52, a vibration pump 53, and an adsorber 54. The left and right ends of the mesh frame 51 are the inlet and outlet, respectively. The filter cotton 52 is filled inside the mesh frame 51. The exhaust port of the exhaust fan 4 is connected to the inlet of the mesh frame 51, and the outlet of the mesh frame 51 is connected to the air inlet of the zeolite rotor 6. The vibration pump 53 is located inside the mesh frame 51 at the top of the mesh frame 51 to drive the filter cotton 52 inside the mesh frame 51 to vibrate. The adsorber 54 is located inside the mesh frame 51 in the area below the inlet of the mesh frame 51 and the exhaust port of the exhaust fan 4. A dust collection box 55, connected to the outlet of the adsorber 54, is located at the bottom of the grid frame 51 below the adsorber 54. A sealable door that can be opened / closed is located on the front of the grid frame 51 for removing the filter cotton 52 and cleaning large particles adsorbed on it. The outlet of the zeolite rotor 6 is connected to the inlet of the catalytic combustion tower 7 via a solenoid valve. The exhaust port of the catalytic combustion tower 7 is connected to the inlet of the cooling tower 8. A preheater 71 is located in the lower part of the catalytic combustion tower 7, a thermocouple tube 72 is located in the middle part of the catalytic combustion tower 7, and a grid 73 is located in the upper part of the catalytic combustion tower 7. The outlet of the cooling tower 8 is connected to the inlet of the activated carbon filter tower 10 via a second exhaust fan 9. An electromagnetic valve is installed between the inlet and outlet of the activated carbon filter tower 10. The desorption fan 11 is located between the desorption outlet of the activated carbon filter tower 10 and the exhaust gas inlet of the catalytic combustion tower 7 to send the desorbed exhaust gas from the activated carbon filter tower 10 into the catalytic combustion tower 7 for combustion treatment. The activated carbon filter tower 10 includes a tower body and three layers of activated carbon adsorption layers disposed within the tower body. The inlet of the desorption fan 11 is connected to the desorption port of each layer of activated carbon adsorption layer in the activated carbon filter tower 10. The exhaust fan 4, the second exhaust fan 9, the zeolite rotor 6, the catalytic combustion tower 7, the cooling tower 8, the desorption fan 11, the vibration pump 53, the adsorber 54, and each electromagnetic valve are all connected to and controlled by a controller, which is a PLC controller.

[0013] In the above embodiments, the controller can also be the controller of the digital printing device control system. The activated carbon filter tower can also be configured with only one layer. The number of activated carbon layers in the activated carbon filter tower is related to the concentration of flue gas and exhaust gas generated by the catalytic combustion tower; it only needs to be able to adsorb the flue gas and exhaust gas generated by the catalytic combustion tower to meet emission standards.

[0014] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. An environmentally friendly digital printing device, comprising a frame, a digital printing mechanism mounted on the frame, and a drying chamber, wherein the drying chamber is located on one side of the digital printing mechanism to dry the products printed by the digital printing mechanism, characterized in that: It also includes a waste gas collection and treatment device, which includes a controller, an exhaust fan, a particulate filter assembly, a zeolite rotor, a catalytic combustion tower, a cooling tower, an activated carbon filter, and a desorption fan. The exhaust fan is located on the drying box, and its inlet extends into the top of the drying box to draw the hot waste gas generated inside the drying box to the inlet of the particulate filter assembly. The outlet of the particulate filter assembly is connected to the inlet of the zeolite rotor, and the outlet of the zeolite rotor is connected to the inlet of the catalytic combustion tower. The exhaust outlet of the catalytic combustion tower is connected to the inlet of the cooling tower, and the outlet of the cooling tower is connected to the inlet of the activated carbon filter. The desorption fan is located between the desorption outlet of the activated carbon filter and the waste gas inlet of the catalytic combustion tower to send the desorbed waste gas from the activated carbon filter into the catalytic combustion tower for combustion treatment. The exhaust fan, zeolite rotor, catalytic combustion tower, cooling tower, and desorption fan are all connected to and controlled by the controller.

2. The environmentally friendly digital printing device according to claim 1, characterized in that: The particulate matter filtration assembly includes a mesh frame and filter cotton. The left and right ends of the mesh frame are the inlet and the outlet, respectively. The filter cotton is filled inside the mesh frame. The exhaust port of the exhaust fan is connected to the inlet of the mesh frame, and the outlet of the mesh frame is connected to the air inlet of the zeolite rotor.

3. The environmentally friendly digital printing device according to claim 2, characterized in that: The particulate matter filtration assembly also includes a vibration pump and an adsorber. The vibration pump is located inside the grid frame at the top of the grid frame to drive the filter cotton inside the grid frame to vibrate. The adsorber is located inside the grid frame in the area below the inlet of the grid frame and the exhaust port of the exhaust fan. The bottom of the grid frame, below the adsorber, has a dust collection box that communicates with the exhaust port of the adsorber. The front or back of the grid frame has a sealable door that can be opened / closed for removing the filter cotton and cleaning the large particles adsorbed on the filter cotton. Both the vibration pump and the adsorber are connected to and controlled by a controller.

4. The environmentally friendly digital printing device according to claim 1, characterized in that: The activated carbon filter tower includes a tower body and multiple activated carbon adsorption layers disposed within the tower body. The inlet of the desorption fan is connected to the desorption port of each activated carbon adsorption layer of the activated carbon filter tower.

5. The environmentally friendly digital printing device according to claim 1, characterized in that: It also includes a second exhaust fan, which is located between the cooling tower outlet and the activated carbon filter inlet.

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