Waste gas treatment system and method based on secondary activated carbon in printed matter production

Abstract

The invention relates to the technical field of printing waste gas treatment, and particularly discloses a waste gas treatment system and method based on secondary activated carbon in printed matter production. A plurality of printing machine bodies are arranged outside one side of the gas collecting tank; each printing machine body is provided with an air blowing pump. An air blowing pipe communicated with the printing machine body is arranged at the output end of the air blowing pump; each printing machine body is provided with an exhaust pipe communicated with the gas collection tank; a pretreatment mechanism is arranged in the gas collection tank, and a secondary activated carbon adsorption tank is arranged outside one side of the gas collection tank; a gas extraction mechanism capable of conveying gas in the gas collection box into the second-stage activated carbon adsorption box is arranged outside one side of the second-stage activated carbon adsorption box; the pretreatment mechanism enables the waste gas to reach better adsorption purification process conditions, so that the purification treatment effect on the printing waste gas is ensured, and the possibility that the printing waste gas pollutes the environment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of printing waste gas treatment, and in particular to a waste gas treatment system and method based on secondary activated carbon in the production of printed matter. Background Art

[0002] A printing press is a machine used to print text and images. It is generally composed of mechanisms such as plate loading, inking, embossing and paper feeding, and is used to complete the printing operation on paper. During the operation of the printing press, since the ink, diluent and dampening oil in the printing press contain a lot of organic solvents, it is easy to generate some waste gas containing irritating substances during the printing process of the printing press. If the printing waste gas is directly discharged, it will cause harm to the surrounding environment and workers.

[0003] In the existing technology, when treating printing waste gas, most of the time, activated carbon adsorption equipment is used to purify the waste gas. If the printing waste gas is directly passed into the activated carbon adsorption equipment for purification, the temperature of the waste gas is high and the composition is relatively complex, which cannot achieve the best adsorption purification process conditions, and thus the waste gas treatment cannot achieve the expected effect. Summary of the Invention

[0004] The present application provides a waste gas treatment system and method based on secondary activated carbon in the production of printed materials, which has the function of pre-treating the waste gas so that the waste gas reaches better adsorption purification process conditions, ensuring the purification treatment effect of the printing waste gas and reducing the possibility of printing waste gas polluting the environment.

[0005] This application provides a waste gas treatment system and method based on secondary activated carbon in printed matter production, which adopts the following technical solutions: A waste gas treatment system based on secondary activated carbon in the production of printed materials, comprising an air collecting box; a plurality of printing machine bodies are arranged on the outside of one side of the air collecting box; an air blow pump is provided on each of the printing machine bodies; an air blow pipe connected to the inside of the printing machine body is provided at the output end of the air blow pump; an exhaust pipe connected to the air collecting box is provided in the air collecting box; a pretreatment mechanism for treating waste gas is provided in the air collecting box, a secondary activated carbon adsorption box is provided on the outside of one side of the air collecting box; an exhaust mechanism is provided on the outside of one side of the secondary activated carbon adsorption box; the exhaust mechanism can transport the gas in the air collecting box to the secondary activated carbon adsorption box.

[0006] By adopting the above technical solution, during the operation of the printing machine body, the air pump is started to blow air, so that the waste gas generated in the printing process is transported to the air collecting box through the exhaust pipe, and the waste gas is pretreated by the pretreatment mechanism to make the waste gas reach better adsorption and purification process conditions. The pretreated waste gas is then transported to the secondary activated carbon adsorption box by the exhaust mechanism, and the adsorption effect of the activated carbon is used to adsorb harmful substances in the waste gas, thereby ensuring the treatment effect of the printing waste gas and reducing the possibility of the printing waste gas polluting the environment.

[0007] Preferably, a partition is fixed inside the air collecting box; the partition divides the inside of the air collecting box into a first cavity and a second cavity; the first cavity is connected to the printing machine body through an exhaust pipe; the second cavity is connected to the secondary activated carbon adsorption box through an exhaust mechanism; the pretreatment mechanism includes a fixed plate and a spray assembly; the fixed plate is fixed to the inner wall of the first cavity, and a filter is installed on the fixed plate; the spray assembly is arranged in the second cavity to perform spray treatment on the exhaust gas; a connecting pipe connecting the first cavity and the second cavity is provided on the outer wall of the air collecting box.

[0008] By adopting the above technical solution, after the exhaust gas enters the first cavity through the exhaust pipe, the filter first filters the exhaust gas to remove larger particles in the exhaust gas. The filtered exhaust gas then enters the second cavity through the connecting pipe. The spray component sprays the exhaust gas to cool it down and pre-treats the exhaust gas to ensure the treatment effect of the exhaust gas.

[0009] Preferably, the spray assembly includes a spray pipe, a liquid storage tank and a pump body; the spray pipe is fixedly connected to the top wall of the second cavity, and a plurality of nozzles are provided on the spray pipe; the liquid storage tank is arranged on the top of the air collecting box, and the liquid storage tank contains the treatment liquid; the pump body is arranged on the air collecting box, and the input end of the pump body is provided with a liquid inlet pipe connected to the liquid storage tank, and the output end of the pump body is provided with a liquid outlet pipe connected to the spray pipe.

[0010] By adopting the above technical solution, the pump body is started to transport the treatment liquid in the liquid storage tank to the spray pipe and spray it out through the nozzle. When the exhaust gas passes through the bottom of the spray pipe, the treatment liquid sprayed on it can not only cool the exhaust gas, but also remove particulate matter in the exhaust gas and neutralize harmful gases, thereby improving the overall effect of exhaust gas treatment.

[0011] Preferably, the air extraction mechanism includes an air extraction pump; the air extraction pump is arranged on the outside of one side of the secondary activated carbon adsorption box, and the input end of the air extraction pump is fixedly connected to an air inlet pipe connected to the second cavity; the output end of the air extraction pump is fixedly connected to an air outlet pipe connected to the secondary activated carbon adsorption box.

[0012] By adopting the above technical solution, when treating the waste gas, the vacuum pump is started to suck the gas in the second cavity and transport the gas to the secondary activated carbon adsorption box, thereby conveniently realizing the transportation of pre-treated waste gas.

[0013] Preferably, a motor is installed on the outer wall of the air collecting box; the output end of the motor is coaxially fixed with a reciprocating screw extending into the first cavity; the outer sleeve of the reciprocating screw is provided with a cleaning brush located at the bottom of the filter; the cleaning brush is threadedly matched with the reciprocating screw, the cleaning brush is slidably matched with the inner wall of the first cavity, and the cleaning brush is in contact with the bottom surface of the filter.

[0014] By adopting the above technical solution, when treating printing waste gas, the starting motor drives the reciprocating screw to rotate, prompting the cleaning brush to move back and forth along the axial direction of the reciprocating screw to clean the filter, thereby removing large particles of impurities adhering to the filter and reducing the possibility of the filter mesh being blocked.

[0015] Preferably, a first rotating shaft located at the top of the filter is rotatably connected to the inner wall of the first cavity; a cam is fixedly connected to the outer wall of one end of the first rotating shaft; a guide rod is fixedly connected to the top surface of the fixed plate; a sliding sleeve outside the guide rod is provided with an impact plate in contact with the top surface of the fixed plate; an extrusion block that can contact the cam is fixedly connected to the side wall of the impact plate close to the cam; the bottom end of the extrusion block is an arc surface that cooperates with the cam; a transmission component that can enable the reciprocating screw to drive the first rotating shaft to rotate is provided on the outside of one end of the first rotating shaft.

[0016] By adopting the above technical solution, the first rotating shaft is driven to rotate through the transmission assembly during the rotation of the reciprocating screw. During the rotation of the first rotating shaft, the cam will contact the arc surface at the bottom end of the extrusion block. Under the cooperation of the cam and the arc surface, the cam will drive the extrusion block and the impact plate to move up. When the cam loses contact with the extrusion block, the impact plate falls back and hits the fixed plate under the action of gravity. In the process of the cam reciprocatingly pushing the extrusion block to move up, the impact plate will reciprocately impact the fixed plate, causing the filter screen to vibrate and shake off impurities, thereby improving the cleaning effect of the filter screen.

[0017] Preferably, the transmission assembly includes a first pulley, a second pulley and a first belt; the first pulley is coaxially fixed to the outer wall of the end of the reciprocating screw rod; the second pulley is coaxially fixed to the outer wall of the end of the first rotating shaft; the first belt is sleeved on the outside of the first pulley and the second pulley.

[0018] By adopting the above technical solution, under the cooperation of the first pulley, the second pulley and the first belt, the reciprocating screw will drive the first rotating shaft to rotate during the rotation process, thereby realizing the transmission of kinetic energy during the rotation of the reciprocating screw.

[0019] Preferably, the second cavity is rotatably connected to a second rotating shaft on the inner wall near the air inlet pipe; the second rotating shaft is coaxial with the first rotating shaft, and fan blades are installed on the outer wall of the second rotating shaft; a third pulley is coaxially fixed to the outer wall of the end of the first rotating shaft; a fourth pulley is coaxially fixed to the outer wall of the end of the second rotating shaft; the third pulley and the fourth pulley are externally sleeved with the same second belt.

[0020] By adopting the above technical solution, with the cooperation of the third pulley, the fourth pulley and the second belt, the first rotating shaft will drive the second rotating shaft to rotate during the rotation process, prompting the fan blades to rotate to blow the exhaust gas entering the intake pipe, thereby extending the exhaust gas spraying time and improving the exhaust gas spraying and impurity removal effect.

[0021] Preferably, the outer cover of the air inlet pipe is provided with a first pipe heating cover; the outer cover of the air outlet pipe is provided with a second pipe heating cover.

[0022] By adopting the above technical solution, when the vacuum pump transports the waste gas after spraying, the first pipe heating jacket and the second pipe heating jacket can heat the gas transported into the secondary activated carbon adsorption box, adjust the temperature and humidity of the gas, and ensure the waste gas adsorption and purification effect.

[0023] A method for treating waste gas based on secondary activated carbon in printed matter production is based on the above-mentioned waste gas treatment system based on secondary activated carbon in printed matter production, and the method comprises the following steps: S1: Using the air pump and the air extraction mechanism to transport the printing waste gas, the waste gas is first collected in the gas collecting box and then enters the secondary activated carbon adsorption box for treatment; S2: When the exhaust gas is collected in the gas collecting box, the exhaust gas is pretreated by the pretreatment mechanism to enable the exhaust gas to reach better adsorption purification process conditions; S3: During the pre-treatment of the exhaust gas, the motor is started to drive the cleaning brush to clean the filter, and the impact plate is prompted to reciprocately impact the fixed plate to drive the filter to vibrate, so that the particulate impurities on the filter fall off, ensuring the filtering effect of the filter.

[0024] In summary, this application has the following beneficial effects: 1. During the printing process, the air pump is started to blow air, so that the waste gas generated during the printing process is transported from the exhaust pipe to the gas collecting box, and the waste gas is pretreated by the pretreatment mechanism to achieve the best adsorption and purification process conditions. The pretreated waste gas is then transported to the secondary activated carbon adsorption box by the exhaust mechanism, and the harmful substances in the waste gas are adsorbed by the adsorption effect of the activated carbon, thereby ensuring the treatment effect of the printing waste gas and reducing the possibility of the printing waste gas polluting the environment; 2. After the exhaust gas enters the gas collecting box, it will first be filtered by the filter. The filtered gas will then enter the second cavity through the connecting pipe. When the exhaust gas circulates in the second cavity, the pump body is started to transport the treatment liquid in the liquid storage tank to the spray pipe and spray it out from the nozzle to spray the exhaust gas, remove particulate matter in the exhaust gas and neutralize harmful gases. When the exhaust gas is sent to the secondary activated carbon adsorption box for adsorption purification treatment, the first pipe heating jacket and the second pipe heating jacket heat the transported exhaust gas and adjust the temperature and humidity of the gas to achieve pre-treatment processing of the exhaust gas and ensure the overall treatment effect of the exhaust gas; 3. Starting the motor can drive the reciprocating screw to rotate, prompting the cleaning brush to move back and forth along the axial direction of the reciprocating screw to clean the filter, remove large particles of impurities adhering to the filter, reduce the possibility of the filter mesh being blocked, and ensure the filtering effect of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of an exhaust gas treatment system based on secondary activated carbon in the production of printed materials in this application; Figure 2 This is a schematic diagram of the coordinated structure of the gas collecting box and the pre-treatment mechanism in this application; Figure 3 It is a schematic diagram of the structure of the shower nozzle in this application; Figure 4 This is a schematic diagram of the coordination structure of the cleaning brush, filter screen and impact plate in this application; Figure 5 Schematic diagram of the matching structure of the reciprocating screw, the transmission assembly and the first rotating shaft in this application; Figure 6 It is a schematic diagram of the transmission structure of the first rotating shaft and the second rotating shaft in this application.

[0026] Explanation of Reference Numerals: 1. Gas collecting box; 11. Partition plate; 12. Connecting pipe; 2. Printing machine body; 21. Air pump; 22. Air blowing pipe; 23. Exhaust pipe; 3. Pretreatment mechanism; 31. Fixing plate; 32. Spray assembly; 321. Spray pipe; 322. Liquid storage tank; 323. Pump body; 324. Spray head; 325. Liquid inlet pipe; 326. Liquid outlet pipe; 33. Filter; 4. Secondary activated carbon adsorption box; 5. Air extraction mechanism; 51. Air extraction pump; 52. Air inlet pipe; 521. First pipe heating jacket; 53. Air outlet pipe; 531. Second pipe heating jacket; 6. Motor; 61. Reciprocating screw; 62. Cleaning brush; 63. First rotating shaft; 631. Cam; 632. Third pulley; 64. Guide rod; 65. Impact plate; 651. Extrusion block; 66. Transmission assembly; 661. First pulley; 662. Second pulley; 663. First belt; 67. Second rotating shaft; 671. Fan blade; 672. Fourth pulley; 68. Second belt. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below with reference to the accompanying drawings. Like components are denoted by like reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "bottom," and "top" used in the following description refer to directions in the accompanying drawings, and the terms "inner" and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0028] The present invention discloses a waste gas treatment system based on secondary activated carbon in the production of printed matter, such as Figure 1 As shown, it includes an air collecting box 1, multiple printing machine bodies 2, a secondary activated carbon adsorption box 4 and an exhaust mechanism 5. Multiple printing machine bodies 2 are arranged on the outside of one side of the air collecting box 1. Each printing machine body 2 is provided with an air pump 21. The input end of the air pump 21 is connected to the external environment, and the output end of the air pump 21 is fixedly connected to a blow pipe 22 connected to the printing machine body 2. Each printing machine body 2 is also fixedly connected to an exhaust pipe 23 connected to the inside of the air collecting box 1. The secondary activated carbon adsorption box 4 is arranged on the outside of one side of the air collecting box 1. The secondary activated carbon adsorption box 4 is existing technology and will not be repeated here. The exhaust mechanism 5 is arranged on the outside of the side of the air collecting box 1 close to the secondary activated carbon adsorption box 4. The exhaust mechanism 5 can transport the gas in the air collecting box 1 to the secondary activated carbon adsorption box 4.

[0029] By starting the air pump 21 to blow the printing waste gas, the waste gas can be transported to the gas collecting box 1 through the exhaust pipe 23, and the printing waste gas is collected by the gas collecting box 1. The gas in the gas collecting box 1 is then sucked by the exhaust mechanism 5, and the waste gas in the gas collecting box 1 is uniformly transported to the secondary activated carbon adsorption box 4. The adsorption effect of activated carbon is used to adsorb harmful substances in the waste gas, thereby realizing the purification of the printing waste gas and reducing the possibility of printing waste gas polluting the environment.

[0030] like Figure 1 and Figure 2 As shown, a connecting pipe 12 is fixed horizontally on the inner wall of the gas collecting box 1, which divides the interior of the gas collecting box 1 into a first cavity and a second cavity. The first cavity is located at the bottom of the partition 11, and the second cavity is located at the top of the partition 11. The exhaust pipe 23 on each printing machine body 2 is connected to the first cavity. A connecting pipe 12 connecting the first cavity and the second cavity is fixed on the outer wall of the gas collecting box 1. The air extraction mechanism 5 includes an air extraction pump 51, an air inlet pipe 52 and an air outlet pipe 53. The air extraction pump 51 is arranged on the outside of the air collecting box 1 on one side close to the secondary activated carbon adsorption box 4. One end of the air inlet pipe 52 is fixedly connected to the input end of the air extraction pump 51, and the other end is fixedly connected to the inner wall of the second cavity away from the connecting pipe 12 and is connected to the second cavity. One end of the air outlet pipe 53 is fixedly connected to the output end of the air extraction pump 51, and the other end is fixedly connected to the inner wall of the secondary activated carbon adsorption box 4 and is connected to the secondary activated carbon adsorption box 4.

[0031] The waste gas can be pre-treated differently in the first cavity and the second cavity of the gas collecting box 1. After the waste gas is pre-treated in the gas collecting box 1, it can be sucked by the vacuum pump 51 to conveniently transport the pre-treated waste gas.

[0032] like Figure 1 、 Figure 2 and Figure 3As shown, a pre-treatment mechanism 3 is provided in the gas collecting box 1, and the pre-treatment mechanism 3 includes a fixed plate 31 and a spray assembly 32. The fixed plate 31 is horizontally fixed to the inner wall of the first cavity, and the fixed plate 31 is positioned higher than the exhaust pipe 23. A filter 33 is provided on the fixed plate 31, and the spray assembly 32 is provided in the second cavity. The spray assembly 32 includes a spray pipe 321, a liquid storage tank 322 and a pump body 323. The spray pipe 321 is horizontally fixed to the inner wall of the top end of the second cavity. The spray pipe 321 is serpentine-shaped. A plurality of vertically downward nozzles 324 are provided on the spray pipe 321. The liquid storage tank 322 is fixed to the top surface of the gas collecting box 1. The liquid storage tank 322 stores the treatment liquid. The pump body 323 is installed on the top surface of the gas collecting box 1. The output end of the pump body 323 is fixedly connected to a liquid inlet pipe 325 connected to the liquid storage tank 322, and the output end of the pump body 323 is fixedly connected to a liquid outlet pipe 326 connected to the spray pipe 321.

[0033] When the exhaust gas enters the first cavity from the exhaust pipe 23, the exhaust gas will first be filtered by the filter 33, and the filtered gas will then enter the second cavity through the connecting pipe 12. When the exhaust gas circulates in the second cavity, the pump body 323 is started to transport the treatment liquid in the liquid storage tank 322 to the spray pipe 321, and the nozzle 324 sprays the exhaust gas to cool it down, remove particulate matter in the exhaust gas, and neutralize harmful gases.

[0034] like Figure 1 and Figure 2 As shown, the air inlet pipe 52 is sheathed with a first pipe heating jacket 521 , and the air outlet pipe 53 is sheathed with a second pipe heating jacket 531 .

[0035] The first pipe heating jacket 521 and the second pipe heating jacket 531 can heat the gas transported into the secondary activated carbon adsorption box 4 so as to adjust the temperature and humidity of the gas.

[0036] like Figure 2 and Figure 4 As shown, a motor 6 is horizontally mounted on the outer wall of the air collecting box 1, and a reciprocating screw 61 extending to the bottom of the fixed plate 31 is coaxially fixed to the output end of the motor 6. A cleaning brush 62 is sleeved on the outside of the reciprocating screw 61 and is threadedly engaged with the reciprocating screw 61. The cleaning brush 62 slides with the inner wall of the first cavity, and the cleaning brush 62 can contact the fixed plate 31 and the bottom surface of the filter screen 33.

[0037] The starting motor 6 drives the reciprocating screw 61 to rotate, prompting the cleaning brush 62 to move back and forth along the axial direction of the reciprocating screw 61 to clean the filter 33, remove large particles of impurities adhering to the filter 33, reduce the possibility of the mesh of the filter 33 being blocked, and ensure the filtering effect of the filter 33.

[0038] like Figure 4 and Figure 5As shown, a first rotating shaft 63 coaxial with the reciprocating screw 61 is horizontally rotatably connected on the inner wall of the first cavity, and the first rotating shaft 63 is located at the top of the fixed plate 31. Cams 631 are fixed to the outer walls of both ends of the first rotating shaft 63. The fixed plate 31 is vertically fixed with a pair of guide rods 64 on the top surfaces close to the two cams 631 respectively. The outer sliding sleeves of the pair of guide rods 64 are provided with an impact plate 65 mounted on the top surface of the fixed plate 31. The impact plate 65 is fixed with an extrusion block 651 located on the top of the cam 631 on the side wall close to the cam 631. The bottom end of the extrusion block 651 is an arc surface that can contact and cooperate with the cam 631. A transmission assembly 66 located outside the air collecting box 1 is provided on the outside of one end of the first rotating shaft 63. The transmission assembly 66 can enable the reciprocating screw 61 to drive the first rotating shaft 63 to rotate.

[0039] During the rotation of the reciprocating screw 61, the transmission assembly 66 drives the first rotating shaft 63 and the cam 631 to rotate. Under the cooperation of the cam 631 and the arc surface, the cam 631 will drive the extrusion block 651 and the impact plate 65 to move upward. When the cam 631 loses contact with the extrusion block 651, the impact plate 65 falls back and hits the fixed plate 31 under the action of gravity, causing the filter 33 to vibrate. In the process of the cam 631 reciprocatingly pushing the extrusion block 651 to move upward, the impact plate 65 will reciprocately impact the fixed plate 31, thereby improving the dredging effect of the filter 33.

[0040] like Figure 4 and Figure 5 As shown, the transmission assembly 66 includes a first pulley 661, a second pulley 662 and a first belt 663. The first pulley 661 is coaxially fixed to the outer wall of the end of the reciprocating screw 61 away from the motor 6, and the second pulley 662 is coaxially fixed to the outer wall of the end of the first rotating shaft 63 away from the motor 6. The first belt 663 is tensioned and sleeved on the outside of the first pulley 661 and the second pulley 662. The first belt 663 links the first pulley 661 and the second pulley 662. With the cooperation of the first pulley 661, the second pulley 662 and the first belt 663, the reciprocating screw 61 will drive the first rotating shaft 63 to rotate during its rotation, thereby realizing the transmission of kinetic energy during the rotation of the reciprocating screw 61.

[0041] like Figure 2 、 Figure 5 and Figure 6 As shown, the second cavity is horizontally connected to the inner wall of the air inlet pipe 52 with a second rotating shaft 67 coaxial with the first rotating shaft 63, and a fan blade 671 is installed on the outer wall of one end of the second rotating shaft 67. The outer wall of the end of the second rotating shaft 67 away from the fan blade 671 is coaxially fixed with a fourth pulley 672 located outside the air collecting box 1, and the outer wall of the end of the first rotating shaft 63 close to the fourth pulley 672 is coaxially fixed with a third pulley 632. The external tensioning sleeves of the third pulley 632 and the fourth pulley 672 are provided with a second belt 68 that links the third pulley 632 and the fourth pulley 672.

[0042] With the cooperation of the third pulley 632, the fourth pulley 672 and the second belt 68, the first rotating shaft 63 will drive the second rotating shaft 67 to rotate during the rotation process, prompting the fan blades 671 to rotate to hinder the flow of exhaust gas, extend the spraying time, and improve the spraying and impurity removal effect.

[0043] A method for treating waste gas based on secondary activated carbon in printed matter production, the method comprising the following steps: S1: The printing waste gas is blown into the gas collecting box 1 by the air pump 21 for collection, and then the printing waste gas collected in the gas collecting box 1 is transported to the secondary activated carbon adsorption box 4 by the air extraction mechanism 5, and the harmful substances in the waste gas are removed by the adsorption effect of the activated carbon; S2: When the exhaust gas is collected in the gas collecting box 1, the exhaust gas is first filtered by the filter 33 provided in the gas collecting box 1, and then the filtered exhaust gas is sprayed and cooled by the spray assembly 32 to remove small particles of impurities in the exhaust gas, neutralize harmful gases, and pre-treat the exhaust gas to achieve better adsorption purification process conditions; S3: During the pretreatment of the exhaust gas, the starting motor 6 drives the reciprocating screw 61 to rotate, prompting the cleaning brush 62 to move back and forth to clean the filter 33. During the rotation of the reciprocating screw 61, the transmission assembly 66 will drive the first rotating shaft 63 to rotate, and the impact plate 65 will reciprocately impact the fixed plate 31, causing the filter 33 to vibrate, reducing the possibility of impurities adhering to the filter 33 and clogging the mesh, thereby ensuring the filtering effect of the filter 33 on the exhaust gas.

[0044] Working principle: When the printing machine body 2 is printing, the air pump 21 is started to blow air and the waste gas generated during the printing process is transported to the gas collecting box 1 through the exhaust pipe 23 for collection. The collected printing waste gas is pre-treated by the pre-treatment mechanism 3 provided in the gas collecting box 1, so that the waste gas reaches the optimal conditions required for the subsequent activated carbon adsorption process. The air pump 51 is started to suck the gas in the gas collecting box 1 and transport the pre-treated waste gas in the gas collecting box 1 to the secondary activated carbon adsorption box 4. The adsorption effect of the activated carbon is used to adsorb harmful substances in the waste gas, thereby reducing the possibility of significant pollution to the environment caused by the discharge of printing waste gas. When the exhaust gas enters the first cavity through the exhaust pipe 23, the exhaust gas is first filtered through the filter screen 33, and the filtered gas enters the second cavity through the communication pipe 12. When the exhaust gas flows in the second cavity, the pump body 323 delivers the treatment liquid in the liquid storage tank 322 to the spray pipe 321, and the spray head 324 sprays the exhaust gas to cool and remove particulate matter and neutralize harmful gases in the exhaust gas. When the exhaust gas is sent to the secondary activated carbon adsorption tank 4 for treatment, the first pipe heating sleeve 521 and the second pipe heating sleeve 531 heat the delivered exhaust gas to adjust the temperature and humidity of the gas, achieve the pretreatment of the exhaust gas, and ensure the overall treatment effect of the exhaust gas. When the exhaust gas is pretreated, the motor 6 drives the reciprocating screw rod 61 to rotate, which promotes the reciprocating movement of the cleaning brush 62 to clean the filter screen 33. The reciprocating screw rod 61 rotates to drive the first rotating shaft 63 to rotate through the transmission assembly 66. The impact plate 65 reciprocally impacts the fixed plate 31, causing the filter screen 33 to vibrate, thereby reducing the possibility of impurities adhering to the filter screen 33 and blocking the mesh holes, ensuring the filtering effect of the filter screen 33 on the exhaust gas. The first rotating shaft 63 rotates to drive the second rotating shaft 67 and the fan blade 671 to rotate, which hinders the flow of exhaust gas by rotating the fan blade 671, prolongs the spraying time of the exhaust gas, improves the exhaust gas spraying and impurity removal effect, and ensures the pretreatment effect of the exhaust gas.

[0045] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A waste gas treatment system based on secondary activated carbon in the production of printed products, characterized by: The invention comprises an air collecting box (1); a plurality of printing machine bodies (2) are arranged outside one side of the air collecting box (1); an air blowing pump (21) is arranged on each of the printing machine bodies (2); an air blowing pipe (22) communicating with the inside of the printing machine body (2) is arranged on the output end of the air blowing pump (21); an exhaust pipe (23) communicating with the air collecting box (1) is arranged on each of the printing machine bodies (2); a pre-treatment mechanism (3) capable of treating exhaust gas is arranged inside the air collecting box (1); a secondary activated carbon adsorption box (4) is arranged outside one side of the air collecting box (1); an exhaust mechanism (5) is arranged outside one side of the secondary activated carbon adsorption box (4); the exhaust mechanism (5) can transport the gas in the air collecting box (1) to the secondary activated carbon adsorption box (4).

2. The waste gas treatment system based on secondary activated carbon in printed matter production according to claim 1, characterized in that: A partition (11) is fixedly connected to the inside of the gas collecting box (1); the partition (11) divides the inside of the gas collecting box (1) into a first cavity and a second cavity; the first cavity is connected to the printing machine body (2) through an exhaust pipe (23); the second cavity is connected to the secondary activated carbon adsorption box (4) through an exhaust mechanism (5); the pretreatment mechanism (3) includes a fixed plate (31) and a spray assembly (32); the fixed plate (31) is fixed to the inner wall of the first cavity, and a filter (33) is installed on the fixed plate (31); the spray assembly (32) is arranged in the second cavity to spray the exhaust gas; a connecting pipe (12) connecting the first cavity and the second cavity is provided on the outer wall of the gas collecting box (1).

3. The waste gas treatment system based on secondary activated carbon in printed matter production according to claim 2, characterized in that: The spray assembly (32) includes a spray pipe (321), a liquid storage tank (322) and a pump body (323); the spray pipe (321) is fixedly connected to the top wall of the second cavity, and a plurality of nozzles (324) are provided on the spray pipe (321); the liquid storage tank (322) is arranged on the top of the gas collecting box (1), and the liquid storage tank (322) contains the treatment liquid; the pump body (323) is arranged on the gas collecting box (1), and the input end of the pump body (323) is provided with a liquid inlet pipe (325) connected to the liquid storage tank (322), and the output end of the pump body (323) is provided with a liquid outlet pipe (326) connected to the spray pipe (321).

4. The waste gas treatment system based on secondary activated carbon in printed matter production according to claim 2, characterized in that: The air extraction mechanism (5) comprises an air extraction pump (51); the air extraction pump (51) is arranged outside one side of the secondary activated carbon adsorption box (4); the input end of the air extraction pump (51) is fixedly connected to an air inlet pipe (52) communicating with the second cavity; the output end of the air extraction pump (51) is fixedly connected to an air outlet pipe (53) communicating with the secondary activated carbon adsorption box (4).

5. The waste gas treatment system based on secondary activated carbon in printed matter production according to claim 4, characterized in that: A motor (6) is mounted on the outer wall of the air collecting box (1); a reciprocating screw (61) extending into the first cavity is coaxially fixed to the output end of the motor (6); a cleaning brush (62) located at the bottom of the filter (33) is sleeved on the outside of the reciprocating screw (61); the cleaning brush (62) is threadedly engaged with the reciprocating screw (61), the cleaning brush (62) is slidably engaged with the inner wall of the first cavity, and the cleaning brush (62) is in contact with the bottom surface of the filter (33).

6. The waste gas treatment system based on secondary activated carbon in printed matter production according to claim 5, characterized in that: A first rotating shaft (63) located at the top of the filter (33) is rotatably connected to the inner wall of the first cavity; a cam (631) is fixedly connected to the outer wall of one end of the first rotating shaft (63); a guide rod (64) is fixedly connected to the top surface of the fixed plate (31); an impact plate (65) is provided on the outer sliding sleeve of the guide rod (64) and is in contact with the top surface of the fixed plate (31); an extrusion block (651) that can contact the cam (631) is fixedly connected to the side wall of the impact plate (65) close to the cam (631); the bottom end of the extrusion block (651) is an arc surface that matches the cam (631); a transmission component (66) is provided on the outside of one end of the first rotating shaft (63) so that the reciprocating screw rod (61) can drive the first rotating shaft (63) to rotate.

7. The waste gas treatment system based on secondary activated carbon in printed matter production according to claim 6, characterized in that: The transmission assembly (66) includes a first pulley (661), a second pulley (662) and a first belt (663); the first pulley (661) is coaxially fixed to the outer wall of the end of the reciprocating screw rod (61); the second pulley (662) is coaxially fixed to the outer wall of the end of the first rotating shaft (63); the first belt (663) is sleeved on the outside of the first pulley (661) and the second pulley (662).

8. The waste gas treatment system based on secondary activated carbon in printed matter production according to claim 6, characterized in that: The second cavity is rotatably connected to a second rotating shaft (67) on the inner wall near the air inlet pipe (52); the second rotating shaft (67) is coaxial with the first rotating shaft (63), and a fan blade (671) is installed on the outer wall of the second rotating shaft (67); a third pulley (632) is coaxially fixed to the outer wall of the end of the first rotating shaft (63); a fourth pulley (672) is coaxially fixed to the outer wall of the end of the second rotating shaft (67); the third pulley (632) and the fourth pulley (672) are externally sleeved with the same second belt (68).

9. The waste gas treatment system based on secondary activated carbon in printed matter production according to claim 4, characterized in that: The air inlet pipe (52) is externally sheathed with a first pipe heating jacket (521); the air outlet pipe (53) is externally sheathed with a second pipe heating jacket (531).

10. A method for treating waste gas based on secondary activated carbon in printed matter production, based on the waste gas treatment system based on secondary activated carbon in printed matter production according to any one of claims 1 to 9, characterized in that: The method comprises the following specific steps: S1: using the air pump (21) and the air extraction mechanism (5) to transport the printing waste gas, so that the waste gas is first collected in the gas collecting box (1) and then enters the secondary activated carbon adsorption box (4) for treatment; S2: When the waste gas is collected in the gas collecting box (1), the waste gas is pretreated by the pretreatment mechanism (3), so as to achieve better adsorption purification process conditions for the waste gas; S3: During the pre-treatment of the exhaust gas, the motor (6) is started to drive the cleaning brush (62) to clean the filter (33), and the impact plate (65) is prompted to impact the fixed plate (31) back and forth to drive the filter (33) to vibrate, so that the particulate impurities on the filter (33) fall off, thereby ensuring the filtering effect of the filter (33).

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