Waste gas treatment device for printing machine

Abstract

The utility model provides a waste gas treatment device for a printing machine, particularly relates to the technical field of waste gas treatment equipment, and comprises a collecting cover for collecting waste gas, a pipeline assembly for conveying the waste gas collected by the collecting cover and a filtering assembly for treating the waste gas, the filter assembly comprises a box body, an activated carbon filter screen is arranged in the box body in a sliding mode, a gas storage chamber is arranged in the box body and located on one side of the activated carbon filter screen, and a photocatalytic oxidation part is arranged in the gas storage chamber; according to the waste gas treatment device, VOCs in waste gas can be efficiently oxidized through cooperation of the activated carbon filter screen and the photocatalytic oxidation piece, so that pollution of the waste gas to the environment is reduced, repeated waste gas extraction treatment work can be achieved through cooperation of the exhaust fan, the catalyst coating plate, the vent hole and the ultraviolet lamp, and therefore the content of the VOCs in the waste gas is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment devices, in particular to a waste gas treatment device for a printing press. Background Art

[0002] A printing press is a machine for printing words and images. Modern printing presses generally consist of mechanisms such as plate loading, inking, impression, and paper feeding (including folding). Its working principle is as follows: First, the words and images to be printed are made into printing plates and installed on the printing press. Then, ink is applied to the areas with words and images on the printing plate by manual or the printing press. Next, it is directly or indirectly transferred to paper or other printing substrates (such as textiles, metal plates, plastics, leather, wood boards, glass, and ceramics), thereby replicating the same printed matter as the printing plate.

[0003] When a printing press conducts production activities, waste gas will be generated, and at the same time, there may be tiny paper scraps in the waste gas. If the waste gas is directly discharged into the environment, it will cause pollution to the environment. Therefore, before the waste gas is discharged, it is necessary to use a treatment device to control the content of paper scraps and organic waste gas VOCs in the waste gas.

[0004] Existing waste gas treatment devices, for example, a printing press waste gas recovery and purification device disclosed in the patent with the publication number CN217139741U. The filtering equipment mentioned in this patent is multi-layer filter screen filtering. However, if only the multi-layer filter screen is used alone, the treatment effect on organic waste gas VOCs will be poor, and it is extremely easy to cause the content of organic waste gas VOCs in the waste gas discharged into the air to be too high, thereby causing air pollution.

[0005] Therefore, it is necessary to design a waste gas treatment device with efficient treatment of organic waste gas VOCs. Summary of the Utility Model

[0006] In order to solve the above problems, the utility model proposes a waste gas treatment device for a printing press to more precisely solve the above problems.

[0007] The utility model is achieved through the following technical solutions:

[0008] The utility model provides an exhaust gas treatment device for a printing machine, which comprises a collection hood for collecting exhaust gas, a pipeline assembly for conveying the exhaust gas collected by the collection hood, and a filtering assembly for treating the exhaust gas; the filtering assembly comprises a box body, a gas storage chamber is arranged in the box body, an activated carbon filter screen is slidably arranged in the gas storage chamber, a photocatalytic oxidation element is arranged in the gas storage chamber and on one side of the activated carbon filter screen, the photocatalytic oxidation element comprises an ultraviolet lamp, an installation ring for fixing a catalyst coating plate is arranged on the top of the gas storage chamber and on the circumference of the ultraviolet lamp, a plurality of ventilation holes are formed in both the installation ring and the catalyst coating plate, a bottom plate is connected to the bottom of the catalyst coating plate, an air extraction fan is arranged on the bottom plate, an exhaust pipeline is arranged below one side of the box body, and the exhaust pipeline is communicated with the gas storage chamber.

[0009] Further, the pipeline assembly comprises a connecting pipeline connected to the collection hood, the other end of the connecting pipeline is connected with a three-way valve, one side of the three-way valve is connected with a straight conveying pipeline, the rear end of the three-way valve is connected with a circulating conveying pipeline, and the other end of the circulating conveying pipeline is communicated with the box body.

[0010] Further, a gas sensor is arranged in the box body and in the gas storage chamber.

[0011] Further, an air inlet is formed in the collection hood, a filter screen is arranged in the air inlet, and a particulate matter collection piece is arranged at the bottom of the collection hood and in front of the filter screen.

[0012] Further, the particulate matter collection piece comprises a collection box threadedly connected to the bottom of the collection hood and a storage groove formed in the collection box.

[0013] Further, a movable door is hingedly connected to the front end of the box body, and a sealing member is arranged at the contact position between the movable door and the front end of the box body.

[0014] The beneficial effects of the utility model are as follows:

[0015] The cooperation between the activated carbon filter screen and the photocatalytic oxidation element can efficiently oxidize and treat VOCs in the exhaust gas, thereby reducing the environmental pollution caused by the exhaust gas. Among them, the cooperation of the air extraction fan, the catalyst coating plate, the ventilation holes and the ultraviolet lamp can realize the repeated extraction and treatment of the exhaust gas, thereby further reducing the content of VOCs in the exhaust gas;

[0016] The setting of the three-way valve can switch the gas transmission pipeline. The function of the straight transmission pipeline is to quickly input the waste gas into the box body, while the function of the circulating transmission pipeline is to increase the time for the gas to be injected into the box body by following the gas flow channel. The significance of setting the circulating pipeline is that when needed, it can provide sufficient time for filtering the waste gas in the box body. When the waste gas filtering time is sufficient, the content of waste gas in the gas can be further reduced, thus playing a role in environmental protection. Brief Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure in the present utility model;

[0018] Figure 2 It is a schematic diagram of the filter component structure in the present utility model;

[0019] Figure 3 It is a schematic diagram of the photocatalytic oxidation component structure in the present utility model;

[0020] Figure 4 It is a schematic diagram of the pipeline component structure in the present utility model;

[0021] Figure 5 It is a schematic diagram of the particulate matter collection component structure in the present utility model.

[0022] In the figure, 1. Collection hood; 11. Air inlet; 12. Filter screen; 13. Particulate matter collection component; 121. Collection box; 122. Storage tank; 2. Pipeline transmission component; 21. Three-way valve; 22. Straight transmission pipe; 23. Circulating transmission pipeline; 3. Filter component; 31. Box body; 32. Activated carbon filter screen; 33. Storage chamber; 34. Photocatalytic oxidation component; 341. Ultraviolet lamp; 342. Installation ring; 343. Catalyst coating plate; 344. Ventilation hole; 345. Bottom plate; 346. Exhaust fan; 35. Exhaust pipeline; 36. Movable door. Detailed Embodiment

[0023] In order to make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment

[0025] Reference Figures 1-5, An exhaust gas treatment device for a printing press, comprising a collection hood 1 for collecting exhaust gas, a pipeline assembly 2 for conveying the exhaust gas collected by the collection hood 1, and a filtering assembly 3 for treating the exhaust gas; the filtering assembly 3 includes a box body 31, a gas storage chamber 33 is arranged in the box body 31, an activated carbon filter net 32 is slidably arranged in the gas storage chamber 33, in the gas storage chamber 33 and on one side of the activated carbon filter net 32, a photocatalytic oxidation member 34 is arranged, the photocatalytic oxidation member 34 includes an ultraviolet lamp 341, at the top of the gas storage chamber 3, and on the circumference of the ultraviolet lamp 341, a mounting ring 342 for fixing the catalyst coating plate 343 is arranged, a plurality of ventilation holes 344 are formed in both the mounting ring 342 and the catalyst coating plate 343, the bottom of the catalyst coating plate 343 is connected with a bottom plate 345, an exhaust fan 346 is arranged on the bottom plate 345, and an exhaust pipeline 35 is arranged below one side of the box body 31, and the exhaust pipeline 35 is communicated with the gas storage chamber 3;

[0026] The collection hood 1 can be used to collect the exhaust gas generated during the use of the printing press, and the collected exhaust gas will be input into the box body 31 through the pipeline assembly 2 and filtered by the filtering assembly 3 in the box body 31; specifically, the activated carbon filter net 32 slidably connected with the box body 31 will conduct preliminary adsorption treatment on the fine particles and organic waste gas VOCs in the exhaust gas, and the gas after being treated by the activated carbon filter net 32 will enter the gas storage chamber. At this time, the ultraviolet lamp 341 will irradiate the catalyst coating plate 343 and cause the catalytic coating on the catalyst coating plate 343 to carry out a photocatalytic reaction. During the reaction of the catalytic coating, the exhaust fan 346 will extract the exhaust gas moving into the gas storage chamber 3 and make the exhaust gas move to the inside of the catalyst coating plate 343 and carry out the oxidation reaction of organic waste gas VOCs in the catalyst coating plate 343, thereby further reducing the content of organic waste gas VOCs in the exhaust gas. Among them, the setting of the ventilation holes 344 can input the other reacted or incompletely reacted other into the inside of the gas storage chamber 3, and the setting of the exhaust fan 346 can continuously extract the exhaust gas in the gas storage chamber 3 and keep the air inside the gas storage chamber 3 in a circulating state;

[0027] In this embodiment, the coating in the catalyst coating plate 343 is titanium dioxide;

[0028] In this embodiment, by treating the organic waste gas VOCs in a relatively closed environment, the treatment efficiency of the organic waste gas VOCs can be increased to a certain extent;

[0029] In this embodiment, ideally, the extraction rate of the exhaust fan 346 for the gas is the same as the exhaust rate of the ventilation holes 344; in this state, the organic waste gas VOCs can undergo the oxidation reaction maximally;

[0030] In this embodiment, the exhaust gas after the first oxidation is discharged into the interior of the gas storage chamber 33 and waits to be processed a second time until the exhaust gas value in the gas storage chamber 3 reaches the emission standard;

[0031] In this embodiment, the fixing method between the catalyst coating plate 343 and the fixing ring is screw fixing. Specifically, fixing screw holes are provided on both the catalyst coating plate 343 and the fixing ring, and screws are threadedly connected in the fixing screw holes.

[0032] Preferably, referring to Figure 4 , the pipeline assembly 2 includes a connecting pipeline connected to the collection hood 1. The other end of the connecting pipeline is connected to a three-way valve 21. One side of the three-way valve 21 is connected to a straight conveying pipe 22, and the rear end of the three-way valve 21 is connected to a circulating conveying pipeline 23. The other end of the circulating conveying pipeline 23 communicates with the box body 31;

[0033] The setting of the three-way valve 21 can switch the gas conveying pipeline. The function of the straight conveying pipe 22 is to quickly input the exhaust gas into the box body 31, and the function of the circulating conveying pipeline 23 is to increase the time for the gas to be injected into the box body 31 by following the gas flow channel. The significance of setting the circulating pipeline is that when needed, it can provide sufficient time for the exhaust gas filtration in the box body 31. When the exhaust gas filtration time is sufficient, the content of the exhaust gas in the gas can be further reduced, thus playing a role in environmental protection.

[0034] Preferably, inside the box body 31 and located in the gas storage chamber 3, a gas sensor (not shown in the figure) is provided. The setting of the gas sensor can be used to detect and analyze the composition of the gas in the gas storage chamber 3, so as to facilitate the staff to observe the exhaust gas content in the gas storage chamber 3;

[0035] In this embodiment, it also includes a console (not shown in the figure) electrically connected to the gas sensor, the exhaust fan 346, and the ultraviolet lamp 341. The setting of the console can facilitate the staff to observe the data detected by the gas sensor and control the working states of the exhaust fan 346 and the ultraviolet lamp 341;

[0036] In this embodiment, when the exhaust gas in the gas storage chamber 3 meets the standard, the exhaust gas will be discharged into the external air through the discharge pipeline 35.

[0037] Preferably, referring to Figure 4, an air inlet 11 is provided on the collection hood 1, a filter screen 12 is arranged in the air inlet 11, at the bottom of the collection hood 1, and a particulate matter collection member 13 is arranged at the front end of the filter screen 12; the air inlet 11 can be used to collect waste gas and provide a basis for the gas circulation work. The filter screen 12 can block particulate matter in the waste gas, thereby ensuring the cleanliness of the waste gas itself entering the pipeline and avoiding the occurrence of pipeline blockage; and the particulate matter blocked by the filter screen 12 will fall into the particulate matter collection member 13.

[0038] Preferably, referring to Figure 5 , the particulate matter collection member 13 includes a collection box 121 threadedly connected to the bottom of the collection hood 1, and a storage groove 122 opened in the collection box 121; the storage groove 122 can be used to store particulate matter, and the advantage of the threaded connection between the collection box 121 and the collection hood 1 is that it is convenient for the staff to clean the particulate matter in the collection box 121; among them, the premise of cleaning is that the printing press is not in use.

[0039] Preferably, referring to Figure 2 , a movable door 36 is hinged to the front end of the box body 31, and a sealing member (not shown in the figure) is arranged at the contact between the movable door 36 and the front end of the box body 31; the movable door 36 can enable the staff to check and replace the activated carbon filter screen 12 and the ultraviolet lamp 341 in the gas storage chamber, thereby ensuring the progress of the waste gas treatment work.

[0040] Of course, the present utility model can also have other various implementation manners. Based on this implementation manner, other implementation manners obtained by those of ordinary skill in the art without any creative work belong to the scope protected by the present utility model.

Claims

1. A waste gas treatment device for a printing press, characterized in that: It includes a collecting hood for collecting exhaust gas, a pipe assembly for transporting the exhaust gas collected by the collecting hood, and a filtering assembly for treating the exhaust gas; the filtering assembly includes a box body, an air storage chamber is arranged in the box body, an activated carbon filter is slidably arranged in the air storage chamber, a photocatalytic oxidizing component is arranged in the air storage chamber and on one side of the activated carbon filter, the photocatalytic oxidizing component includes an ultraviolet lamp, a mounting ring for fixing a catalyst coating plate is arranged on the top of the air storage chamber and on the circumference of the ultraviolet lamp, a plurality of ventilation holes are provided on the mounting ring and on the catalyst coating plate, the bottom of the catalyst coating plate is connected to a bottom plate, an exhaust fan is provided on the bottom plate, an exhaust duct is arranged at the lower side of one side of the box body, and the exhaust duct is connected to the air storage chamber.

2. The waste gas treatment device for a printing press according to claim 1, characterized in that: The pipeline assembly includes a connecting pipe connected to the collection cover, the other end of the connecting pipe is connected to a three-way valve, one side of the three-way valve is connected to a linear conveying pipe, the rear end of the three-way valve is connected to a circulating conveying pipe, and the other end of the circulating conveying pipe is connected to the box.

3. The waste gas treatment device for a printing press according to claim 1, characterized in that: A gas sensor is arranged in the box and in the gas storage chamber.

4. The waste gas treatment device for a printing press according to claim 1, characterized in that: An air inlet is provided on the collecting cover, a filter is provided in the air inlet, and a particle collecting member is provided at the bottom of the collecting cover and at the front end of the filter.

5. The waste gas treatment device for a printing press according to claim 4, characterized in that: The particle collecting component comprises a collecting box threadedly connected to the bottom of the collecting cover, and a storage groove opened in the collecting box.

6. The waste gas treatment device for a printing press according to claim 1, characterized in that: The front hinge of the box body is connected with a movable door, and a sealing member is arranged at the contact point between the movable door and the front end of the box body.

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