CN115738561B - A green printing processing equipment and method - Google Patents
A green printing processing equipment and methodInfo
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- CN115738561B CN115738561B CN202211099943.5A CN202211099943A CN115738561B CN 115738561 B CN115738561 B CN 115738561B CN 202211099943 A CN202211099943 A CN 202211099943A CN 115738561 B CN115738561 B CN 115738561B
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Abstract
The invention discloses green printing treatment equipment and a method, which belong to the technical field of green printing and aim at the problems of poor dust and smoke purification treatment effect and no compliance with the environmental protection concept of smoke emission in the printing process, and the equipment comprises a purifying box, wherein the side wall of one side of the purifying box is communicated with an air inlet pipe, the bottom surface of the air inlet pipe is communicated with an air inlet cover, three grid filter plates which are distributed in an up-down equidistant manner are arranged on the outer side of the air inlet pipe, and the three grid filter plates are fixed with the side wall of the purifying box; according to the invention, dust and smoke generated during green printing are subjected to isolation filtration through the grating filter plates, water curtain sedimentation dust removal through the grating filter plates, rotary adsorption and rotary scraping of the filter cylinders, isolation filtration through the arc-shaped sieve plates, active carbon adsorption of the active carbon plates and isolation adsorption treatment of the L-shaped mounting frame, so that the dust and smoke are subjected to more sufficient physical purification treatment, and are transferred to a subsequent photocatalytic electrolytic purification treatment box through the exhaust blades, and chemical purification treatment of the dust and smoke is completed.
Description
Technical Field
The invention belongs to the technical field of green printing, and particularly relates to green printing treatment equipment and a green printing treatment method.
Background
The green printing is a printing mode which adopts environment-friendly materials and processes, has little pollution, saves resources and energy sources, is easy to recycle and recycle after being abandoned, can be naturally degraded and has little influence on the ecological environment, and the green printing requirement is coordinated with the environment, and comprises the use of the environment-friendly printing materials, the clean printing production process, the safety of the printed matter to users, the recycling treatment and the recycling of the printed matter, namely, the whole life cycle of the printed matter from raw material selection, production, use, recycling and the like meets the environment-friendly requirement.
The green printing still has a small amount of poisonous printing waste gas to produce in the printing process, and most of these waste gas is discharged outside operational environment or operational environment directly, causes the injury that causes the physical function after the user inhales easily, consequently need to discharge after handling it, and present green printing flue gas treatment device is difficult to reach green's requirement, and is difficult to filter, absorb and react purification treatment to waste gas to lead to it to be inconsistent with green theory.
Therefore, there is a need for a green printing treatment apparatus and method, which solve the problems of poor dust and smoke purification treatment effect and no environment protection concept of smoke emission generated in the printing process in the prior art.
Disclosure of Invention
The present invention is directed to a green printing processing apparatus and method, which solve the above-mentioned problems of the related art.
The green printing treatment equipment comprises a purifying box, wherein one side wall of the purifying box is communicated with an air inlet pipe, the bottom surface of the air inlet pipe is communicated with an air inlet cover, three grid filter plates which are distributed at equal intervals up and down are arranged on the outer side of the air inlet pipe, the three grid filter plates are fixed with the side wall of the purifying box, the top surface of the purifying box is communicated with an exhaust pipe, an exhaust blade which is rotationally connected with the inner wall of the top of the purifying box is arranged below the exhaust pipe, a driving motor which is coaxially connected with the exhaust blade is arranged on the top surface of the purifying box, a water spray pipe is fixedly penetrated in the center of the top surface of the purifying box, a rotary adsorption mechanism matched with the driving motor is arranged on the periphery of the water spray pipe, and a water curtain sedimentation mechanism matched with the rotary adsorption mechanism is arranged above the grid filter plates at the top.
In the scheme, it is to be noted that, rotation adsorption mechanism includes the stand with four equiangular distributions, four the stand all with the top inner wall of purifying box is fixed, four the surface of stand is fixed with the spacing dish jointly, purifying box top inner wall with the top surface center department rotation of spacing dish is connected with the profile of tooth sleeve, the telescopic bottom surface of profile of tooth is fixed with and strains the section of thick bamboo, the profile of tooth sleeve strain the section of thick bamboo with the spray pipe is coaxial distribution setting, purifying box top inner wall with the top surface center department rotation of spacing dish is connected with the profile of tooth circle, the bottom surface of profile of tooth circle is fixed with a plurality of scraping rods that are evenly distributed, the profile of tooth circle with be provided with between the profile of tooth sleeve and the driving gear who is connected with purifying box top inner wall rotation, the outside tooth of driving gear respectively with the profile of tooth circle with profile of tooth sleeve meshing is connected, driving gear with exhaust vane's top is coaxial respectively fixed with the driving pulley, two the surface of driving pulley is provided with driving belt.
It is further worth noting that the cross section of the scraping rod is semi-elliptic, and a plurality of opposite ends of the scraping rod are in contact with the outer surface of the filter cylinder.
It is still further to be noted that the water curtain sedimentation mechanism comprises a liquid collecting cylinder communicated with the center of the bottom surface of the purifying box, a return pipe is communicated with the bottom end of the liquid collecting cylinder, one end, away from the liquid collecting cylinder, of the return pipe is communicated with the inner wall of the top end surface of the purifying box, and a impurity removing pipe is communicated with the outer surface of the bottom of the return pipe.
As a preferred implementation mode, the bottom vertical section of back flow is the U-shaped setting, the edulcoration pipe is located the U-shaped section center department of back flow, the grid filter plate with the lateral wall of purifying box is the slope and distributes, the bottom of grid filter plate is provided with and personally submits the arch of vertical distribution with the grid filter plate slope.
As a preferred implementation mode, one side of the filter cylinder far away from the grating filter plate is provided with an arc-shaped sieve plate fixed with the inner wall of the purifying box, the bottom surface of the exhaust blade is provided with an L-shaped mounting plate fixed with the side wall of the arc-shaped sieve plate, an activated carbon plate is arranged between the bottom surface of the top of the L-shaped mounting plate and the inner wall of the bottom of the purifying box, and the activated carbon plate penetrates through the inner wall of the end face of the purifying box.
As a preferred embodiment, a rotating ring is commonly fixed on the bottom surfaces of the plurality of scraping rods, a rotating rod is fixed on the inner wall of the rotating ring, and a spiral blade is fixedly sleeved on the outer surface of the rotating rod.
A green printing process method based on the green printing process apparatus described above, comprising the steps of:
s1, dust and smoke collection treatment, namely collecting smoke and dust generated by green printing at an air inlet cover, entering a purifying box through an air inlet pipe for centralized collection treatment, and performing primary isolation and filtration treatment on the dust and the smoke through a grid filter plate to form isolation, filtration and purification treatment on the dust and the smoke;
S2, rotary adsorption flushing treatment, namely spraying water on the inner surface of the filter cylinder through cooling water sent in a spray pipe, forming an isolated water film on the outer surface of the filter cylinder, isolating, filtering and purifying dust smoke in the step S1, adsorbing and removing dust in the dust smoke through the isolated water film of the filter cylinder, rotating the filter cylinder and a scraping rod in opposite directions through the action of a rotary adsorption mechanism, carrying out rotary scraping treatment on the dust isolated and adsorbed, and simultaneously, returning scraping liquid to the top surface of a grid filter plate in the step S1 through the action of a water curtain sedimentation mechanism, forming a water curtain through the slope surface of the grid filter plate, and carrying out sedimentation dust removal treatment on the dust smoke;
S3, performing active carbon adsorption treatment, namely performing separation screening on dust and smoke separated and scraped in the step S2 through an arc-shaped sieve plate, performing active carbon adsorption treatment on the smoke through an active carbon plate under the wind power action of an exhaust blade, and performing final separation adsorption treatment on the smoke through an L-shaped mounting plate, so as to finish the physical purification treatment of the dust and the smoke;
s4, photocatalytic electrolytic treatment, namely sending the dust flue gas subjected to the physical purification treatment in the step S3 into a subsequent photocatalytic electrolytic box through an exhaust pipe, so as to perform photocatalytic electrolytic purification treatment on the flue gas, and performing evacuation treatment on the flue gas after reaching the evacuation standard, thereby completing the photocatalytic electrolytic purification treatment on the flue gas.
Compared with the prior art, the green printing processing equipment and method provided by the invention at least comprise the following beneficial effects:
(1) Through driving motor's drive for strain a section of thick bamboo and scrape the pole and rotate along opposite direction, thereby improve and strain the adsorption effect of a section of thick bamboo to dust flue gas, and scrape the pole and strike off the edulcoration to its surface, thereby improve the treatment effect to dust in the dust flue gas greatly, it subsides the dust fall to the top surface of grid filter plate through collecting cylinder and back flow to form the cascade simultaneously, the dust flue gas that makes when green printing handle produces subsides the rotation of dust removal, a section of thick bamboo through isolated filtration of grid filter plate, the cascade subsides the dust removal of grid filter plate, strain and adsorb and rotate the striking off, thereby improve the purifying effect to dust flue gas greatly.
(2) The arc-shaped screen plate is arranged, so that not only can the flushing liquid sprayed by the water spraying pipe be isolated to a certain extent, but also the flue gas can be subjected to secondary isolation adsorption treatment, the activated carbon plate is used for carrying out activated carbon adsorption treatment on the water vapor and the flue gas, and finally, the final isolation adsorption treatment is carried out through the L-shaped mounting plate, so that the flue gas subjected to multiple physical purification is better discharged to the next procedure through the exhaust blades.
(3) Through the isolated filtration to the dust flue gas that produces when green printing handles, the cascade of grid filter plate subsides the dust removal, the rotation of straining a jar is adsorbed and is rotated to strike off, the isolated filtration of arc sieve, the activated carbon adsorption of activated carbon plate and the isolated adsorption treatment of L shape mounting bracket, thereby make the dust flue gas carry out more abundant physical purification treatment, and shift to follow-up photocatalysis electrolytic purification treatment case through exhaust blade, accomplish the chemical purification treatment to the dust flue gas, thereby improve the treatment effect to the dust flue gas greatly, thereby make and reach green's fume emission standard.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the exhaust pipe of the present invention;
FIG. 3 is a schematic view of the internal part of the purifying box of the present invention;
FIG. 4 is a schematic view of a part of the rotary adsorbing mechanism according to the present invention;
FIG. 5 is a schematic view of a partial structure of a rotary ring according to the present invention;
Fig. 6 is a schematic view showing a partial structure of a driving gear of the present invention.
The device comprises a purifying box 1, an air inlet pipe 2, an air inlet cover 3, a grid filter plate 4, a grid filter plate 5, an air outlet pipe 6, an air exhaust blade 7, a driving motor 8, a water spray pipe 9, a rotary adsorption mechanism 91, an upright post 92, a limiting disc 93, a tooth-shaped sleeve 94, a filter cylinder 95, a tooth-shaped ring 96, a scraping rod 97, a driving gear 98, a driving belt pulley 99, a driving belt 10, a water curtain sedimentation mechanism 101, a liquid collecting cylinder 102, a return pipe 103, an impurity removing pipe 11, an arc-shaped sieve plate 12, an L-shaped mounting plate 13, an activated carbon plate 14, a rotary ring 15, a rotary rod 16 and a spiral blade.
Detailed Description
The invention is further described below with reference to examples.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, and it is apparent that the described embodiments are some, but not all, embodiments of the present invention, and all other embodiments obtained by persons of ordinary skill in the art without inventive labor based on the described embodiments of the present invention are included in the scope of protection of the present invention.
The following examples are illustrative of the present invention but are not intended to limit the scope of the invention. The conditions in the examples can be further adjusted according to specific conditions, and simple modifications of the method of the invention under the premise of the conception of the invention are all within the scope of the invention as claimed.
Referring to fig. 1-6, the invention provides a green printing treatment device, which comprises a purifying box 1, wherein one side wall of the purifying box 1 is communicated with an air inlet pipe 2, the bottom surface of the air inlet pipe 2 is communicated with an air inlet cover 3, the outer side of the air inlet pipe 2 is provided with three grid filter plates 4 which are distributed at equal intervals up and down, the three grid filter plates 4 are all fixed with the side wall of the purifying box 1, the top surface of the purifying box 1 is communicated with an exhaust pipe 5, wherein the outer end of the exhaust pipe 5 is connected with a photocatalytic electrolytic box, so that the purifying box 1 performs chemical purification treatment on dust and smoke after physical purification, an exhaust blade 6 which is rotationally connected with the inner wall of the top of the purifying box 1 is arranged below the exhaust pipe 5, the top surface of the purifying box 1 is provided with a driving motor 7 which is coaxially connected with the exhaust blade 6, a water spraying pipe 8 is fixedly penetrated in the center of the top surface of the purifying box 1, the outer end of the water spraying pipe 8 is connected with a spraying water supply facility, a rotating adsorption mechanism 9 matched with the driving motor 7 is arranged on the periphery of the water spraying pipe 8, and a water curtain sedimentation mechanism 10 matched with the rotating adsorption mechanism 9 is arranged above the grid filter plates 4.
Further, as shown in fig. 3, fig. 4 and fig. 6, it is worth specifically explaining that the rotary adsorption mechanism 9 includes the upright posts 91 distributed with four equal angles, the four upright posts 91 are all fixed with the top inner wall of the purifying box 1, the outer surfaces of the four upright posts 91 are jointly fixed with the limiting plate 92, the top inner wall of the purifying box 1 and the top center of the limiting plate 92 are rotationally connected with the toothed sleeve 93, the bottom surface of the toothed sleeve 93 is fixed with the filter cylinder 94, the toothed sleeve 93, the filter cylinder 94 and the water spray pipe 8 are coaxially distributed, the top inner wall of the purifying box 1 and the top center of the limiting plate 92 are rotationally connected with the toothed ring 95, a plurality of scraping rods 96 which are uniformly distributed are fixed on the bottom surface of the toothed ring 95, a driving gear 97 which is rotationally connected with the top inner wall of the purifying box 1 is arranged between the toothed ring 95 and the toothed sleeve 93, the outer teeth of the driving gear 97 are respectively meshed with the toothed ring 95 and the toothed sleeve 93, the top ends of the driving gear 97 and the exhaust blades 6 are respectively coaxially fixed with driving pulleys 98, and the outer surfaces of the two driving pulleys 98 are provided with driving belts 99.
Further, as shown in fig. 3, it is worth specifically to say that the scraper bars 96 are semi-elliptical in cross-section, with opposite ends of the plurality of scraper bars 96 contacting the outer surface of the filter cartridge 94.
Further, as shown in fig. 1, fig. 2 and fig. 5, it is worth specifically describing that the water curtain sedimentation mechanism 10 includes a collector tube 101 communicating with the center of the bottom surface of the purifying tank 1, a return tube 102 communicating with the bottom end of the collector tube 101, one end of the return tube 102 far away from the collector tube 101 communicating with the inner wall of the top end surface of the purifying tank 1, a impurity removing tube 103 communicating with the bottom outer surface of the return tube 102, wherein the bottom end of the impurity removing tube 103 is provided with a valve for opening impurities entering into the return tube 102 to remove impurities, and in the process of return, the valve is closed to ensure that the scraping liquid in the return tube 102 better enters into the top surface of the grid filter plate 4.
Further, as shown in fig. 2 and 5, it is worth specifically explaining that the bottom vertical section of the return pipe 102 is provided in a U shape, the impurity removing pipe 103 is located at the center of the U-shaped section of the return pipe 102, the grid filter plates 4 are obliquely distributed with the side walls of the purifying box 1, and the bottom ends of the grid filter plates 4 are provided with protrusions vertically distributed with the oblique slope surfaces of the grid filter plates 4.
The scheme comprises the following working processes: the flue gas and dust generated by green printing are concentrated at the air inlet cover 3, enter the purifying box 1 through the air inlet pipe 2 to be concentrated and collected, dust and the flue gas are subjected to primary isolation and filtration treatment through the grid filter plate 4, the isolation and filtration purification treatment of the dust and the flue gas is formed, the inner surface of the filter cylinder 94 is subjected to water spraying treatment through cooling water fed into the spray pipe 8, an isolated water film is formed on the outer surface of the filter cylinder 94, the dust and the flue gas are subjected to isolation adsorption treatment through the isolated water film of the filter cylinder 94, the dust in the dust and the flue gas are removed by adsorption, at the moment, the exhaust fan is driven by the driving motor 7 to rotate in the purifying box 1, and the driving gear 97 and the tooth-shaped sleeve 93 are in meshed transmission, the driving gear 97 and the tooth-shaped sleeve 93 are reversely rotated, the tooth-shaped ring 95 and the driving gear 97 are rotated in the same direction, the scraping rod 96 on the bottom surface of the tooth-shaped ring 95 and the filter cylinder 94 on the bottom surface are rotated along the opposite direction, the outer surface of the filter cylinder 94 is realized, the dust in the full isolation and the flue gas is adsorbed, the scraping rod 96 is greatly scraped, the dust in the surface is greatly separated, the dust is greatly scraped off the surface of the dust is greatly, the dust is greatly separated from the dust and the dust is discharged to reach the top surface of the grid 4 through the grid filter plate 4, the dust is collected, the dust is absorbed by the dust and the dust is discharged to the surface of the dust and filtered by the dust is discharged, the dust is discharged by the dust, and filtered, and has the dust is discharged, and filtered by the dust is discharged by dust is discharged. Thereby further improving the sedimentation dust removal and the rotation isolation adsorption scraping effect of dust and smoke.
According to the working process, the filter cylinder 94 and the scraping rod 96 are driven by the driving motor 7 to rotate in opposite directions, so that the adsorption effect of the filter cylinder 94 on dust and smoke is improved, the scraping rod 96 scrapes and removes impurities on the surface of the filter cylinder, the dust treatment effect on the dust and smoke is greatly improved, meanwhile, a water curtain is formed on the top surface of the grid filter plate 4 through the liquid collecting cylinder 101 and the return pipe 102 to settle and dust, the dust and smoke generated during green printing treatment is isolated and filtered through the grid filter plate 4, the water curtain of the grid filter plate 4 settles and removes dust, and the filter cylinder 94 rotates, adsorbs and scrapes in a rotating mode, so that the dust and smoke purifying effect is greatly improved.
Further, as shown in fig. 3 and 5, it is worth specifically explaining that the side of the filter cylinder 94 far away from the grating filter plate 4 is provided with an arc-shaped screen plate 11 fixed with the inner wall of the purifying box 1, the bottom surface of the exhaust blade 6 is provided with an L-shaped mounting plate 12 fixed with the side wall of the arc-shaped screen plate 11, an activated carbon plate 13 is arranged between the top bottom surface of the L-shaped mounting plate 12 and the bottom inner wall of the purifying box 1, the activated carbon plate 13 penetrates through the inner wall of the end face of the purifying box 1, the arc-shaped screen plate 11 is arranged, not only can isolate the flushing liquid sprayed by the water spray pipe 8 to a certain extent, but also can isolate and adsorb the flue gas again, the activated carbon plate 13 adsorbs the moisture and the flue gas through the L-shaped mounting plate 12, and finally, the flue gas subjected to multiple physical purification is discharged to the next procedure better through the exhaust blade 6.
Further, as shown in fig. 5, it is worth specifically explaining that the bottom surfaces of the plurality of scraping rods 96 are jointly fixed with the rotating ring 14, the rotating rod 15 is fixed on the inner wall of the rotating ring 14, the spiral blades 16 are tightly sleeved on the outer surface of the rotating rod 15, the rotating ring 14 is arranged to scrape the bottom surface of the filter cylinder 94, the spiral blades 16 are arranged to guide the scraped liquid to a certain extent, and therefore the liquid in the return pipe 102 more conveniently reaches the top surface of the grid filter plate 4.
The green printing processing method is based on the green printing processing device and comprises the following steps of:
S1, collecting dust and smoke, namely collecting smoke and dust generated by green printing at an air inlet cover 3, entering a purifying box 1 through an air inlet pipe 2 for centralized collection, and performing primary isolation filtering treatment on the dust and the smoke through a grid filter plate 4 to form isolation filtering and purifying treatment on the dust and the smoke;
S2, rotary adsorption flushing treatment, namely spraying water on the inner surface of the filter cylinder 94 through cooling water sent in the spray pipe 8, forming an isolated water film on the outer surface of the filter cylinder 94, isolating, filtering and purifying dust and smoke in the step S1 through the isolated water film of the filter cylinder 94, adsorbing and removing dust in the dust and smoke, rotating the filter cylinder 94 and the scraping rod 96 in opposite directions through the action of the rotary adsorption mechanism 9, carrying out rotary scraping treatment on the dust isolated and adsorbed, and simultaneously, carrying out water curtain sedimentation mechanism 10, wherein the scraping liquid flows back to the top surface of the grating filter plate 4 in the step S1, forms a water curtain through the slope surface of the grating filter plate 4, and carrying out sedimentation dust removal treatment on the dust and smoke;
S3, performing active carbon adsorption treatment, namely performing separation screening on dust and smoke separated and scraped in the step S2 through an arc-shaped screen plate 11, performing active carbon adsorption treatment on the smoke through an active carbon plate 13 under the wind power action of an exhaust blade 6, and performing final separation adsorption treatment on the smoke through an L-shaped mounting plate 12, so as to finish the physical purification treatment of the dust and smoke;
S4, photocatalytic electrolytic treatment, namely sending the dust flue gas subjected to the physical purification treatment in the step S3 into a subsequent photocatalytic electrolytic tank through an exhaust pipe 5, so as to perform photocatalytic electrolytic purification treatment on the flue gas, and performing evacuation treatment on the flue gas after reaching the evacuation standard, thereby completing the photocatalytic electrolytic purification treatment on the flue gas.
In combination, the dust and smoke generated during green printing treatment is subjected to the isolation and filtration of the grating filter plate 4, the water curtain sedimentation and dust removal of the grating filter plate 4, the rotary adsorption and rotary scraping of the filter cylinder 94, the isolation and filtration of the arc-shaped sieve plate 11, the active carbon adsorption of the active carbon plate 13 and the isolation and adsorption treatment of the L-shaped mounting frame, so that the dust and smoke are subjected to more sufficient physical purification treatment, and are transferred to a subsequent photocatalytic electrolytic purification treatment box through the exhaust blades 6, the chemical purification treatment of the dust and smoke is completed, and the treatment effect of the dust and smoke is greatly improved, so that the green and environment-friendly smoke emission standard is achieved.
The driving motor 7 can be purchased in the market, and the driving motor 7 is provided with a power supply, which belongs to the mature technology in the field and is fully disclosed, so that the description is not repeated.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs, the terms "comprising" or "comprises" and the like as used herein shall mean that the element or article preceding the term encompasses the element or article listed after the term and equivalents thereof without excluding other elements or articles, and that the terms "connected" or "connected" and the like shall not be limited to physical or mechanical connections, but shall also include electrical connections, whether direct or indirect, "upper", "lower", "left", "right", etc. are merely intended to indicate relative positional relationships that may also be correspondingly altered when the absolute position of the object being described is altered.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
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| CN202211099943.5A CN115738561B (en) | 2022-09-09 | 2022-09-09 | A green printing processing equipment and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211099943.5A CN115738561B (en) | 2022-09-09 | 2022-09-09 | A green printing processing equipment and method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210356405U (en) * | 2019-04-23 | 2020-04-21 | 江门市蓬江区新鸿基实业有限公司 | A waste gas treatment system for a printing press |
| CN217163716U (en) * | 2022-05-10 | 2022-08-12 | 合肥宏图彩印有限公司 | Waste gas treatment device for paper mill |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112892137A (en) * | 2021-01-14 | 2021-06-04 | 航天凯天环保科技股份有限公司 | Modular high-efficient exhaust purification all-in-one of modularization |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210356405U (en) * | 2019-04-23 | 2020-04-21 | 江门市蓬江区新鸿基实业有限公司 | A waste gas treatment system for a printing press |
| CN217163716U (en) * | 2022-05-10 | 2022-08-12 | 合肥宏图彩印有限公司 | Waste gas treatment device for paper mill |
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