Printing workshop integrated waste gas treatment system and atmospheric pollution treatment method

Abstract

The invention belongs to the technical field of waste gas purification treatment, and particularly relates to a printing workshop integrated waste gas treatment system and an air pollution treatment method.The problems that waste gas treatment is insufficient and low in efficiency are solved.The system comprises a shell and is divided into a washing cavity, a purification cavity and a filtering cavity through partition plates, the washing cavity is provided with a spraying structure, and a driving shaft drives a cone to rotate to enable waste gas to overflow; the water pipe and the nozzle are fully contacted with waste gas; the purification cavity is provided with an ultraviolet lamp tube and an intermittent structure, gear transmission drives a sealing plate to lift, and the ultraviolet irradiation time of waste gas is prolonged; the filtering cavity is provided with an alternate filtering structure, the two frame bodies with activated carbon are alternately used, convenient replacement is achieved through the pressing plate and other components, the system is further provided with an induced draft fan, a liquid injection pipe and other auxiliary devices, waste gas of a printing workshop can be effectively treated, and the treatment efficiency and quality are improved.

Description

Technical Field

[0001] This invention relates to the field of waste gas purification and treatment technology, and in particular to an integrated waste gas treatment system for a printing workshop and a method for treating air pollution. Background Technology

[0002] Printing workshops generate a large amount of waste gas during production, containing pollutants such as particulate matter, fumes, and some soluble organic compounds. Existing waste gas treatment systems suffer from several drawbacks. In the waste gas washing stage, the waste gas does not fully contact the spray water, resulting in incomplete removal of particulate matter and fumes. In the purification stage, the waste gas has a short residence time in the purification chamber, leading to poor ultraviolet decomposition. In the filtration stage, replacing activated carbon requires shutting down the entire system, affecting treatment efficiency and increasing the risk of waste gas spillage during replacement. These problems make existing waste gas treatment systems inadequate for efficiently and stably treating waste gas from printing workshops, failing to meet increasingly stringent environmental protection requirements.

[0003] Therefore, in order to solve the above problems, this application proposes an integrated exhaust gas treatment system for printing workshops and a method for treating air pollution. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing waste gas treatment systems, such as difficulty in achieving sufficient contact between the waste gas and the spray water, short residence time of the waste gas in the purification chamber, and the need to suspend the entire system operation to replace activated carbon, which affects the treatment efficiency. Therefore, this invention proposes an integrated waste gas treatment system and air pollution treatment method for printing workshops.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An integrated exhaust gas treatment system for a printing workshop includes a housing with two partitions fixed inside. The housing forms a rinsing chamber, a purification chamber, and a filtration chamber through the two partitions. An air inlet pipe and an exhaust pipe are fixed at both ends of the housing, respectively. The air inlet pipe is connected to the rinsing chamber, and the exhaust pipe is connected to the filtration chamber.

[0007] The rinsing chamber is equipped with a spray structure, which includes a drive shaft rotatably connected to the rinsing chamber and a cone fixedly disposed at one end of the drive shaft. The cone cooperates with the air inlet pipe, and the end of the drive shaft away from the cone extends rotatably into the purification chamber and is rotatably connected to a corresponding partition.

[0008] It also includes multiple ultraviolet lamps, which are divided into two groups and fixedly installed on the top and bottom inner walls of the purification chamber.

[0009] The purification chamber is equipped with an intermittent structure;

[0010] It also includes an alternating filtration structure, which comprises two alternately used frames, each of which contains activated carbon.

[0011] When the drive shaft rotates, the cone throws the exhaust gas outwards, making the exhaust gas thinner and easier to spray; the intermittent structure controls the intermittent emission of exhaust gas to prolong the time of ultraviolet irradiation of the exhaust gas; activated carbon is used alternately to continuously filter the exhaust gas.

[0012] In one possible design, the spray structure further includes a baffle plate fixedly disposed within a rinsing chamber, and two water pipes I fixedly disposed within the rinsing chamber. The two water pipes I are located on the side of the baffle plate away from the adjacent baffle plate and are located between the cone and the baffle plate. Multiple nozzles I are fixedly disposed at the bottom of the water pipes I. Multiple air ducts are provided on the outer wall of the cone. An air inlet I is provided inside the baffle plate.

[0013] When the drive shaft rotates, the cone disperses and throws out the exhaust gas through the air intake groove, making the exhaust gas thinner. The water sprayed by nozzle I fully contacts the exhaust gas to capture particulate matter, oil fumes and soluble organic matter.

[0014] In one possible design, the spray structure further includes a cavity disposed between a partition plate and an adjacent partition plate. A water pipe II is fixedly disposed within the cavity. Multiple nozzles II are fixedly disposed at the bottom of the water pipe II. Multiple oblique holes are provided in the partition plate adjacent to the partition plate. Multiple nozzles III are fixedly disposed on the outer wall of the water pipe II. The nozzles III are positioned corresponding to the oblique holes, and the nozzles III are inclined with their spray nozzles facing the oblique holes.

[0015] When the exhaust gas enters the cavity through the air inlet I and moves upward, the nozzle II backwashes the exhaust gas; when the exhaust gas passes through the oblique hole, the nozzle III sprays again to fully adsorb pollutants.

[0016] In one possible design, the intermittent structure includes gear I, which is fixedly sleeved on the outer wall of the drive shaft and located inside the purification chamber. Gear II is rotatably connected to the inner wall of the purification chamber away from the flushing chamber. Gear II meshes with gear I. A track groove is provided on one side of gear II. The track groove is composed of an arc groove and a V-groove. A pin is slidably fitted in the track groove. A fixing rod is fixedly provided at one end of the pin. A sealing plate is fixedly provided on one side of the fixing rod. The sealing plate is slidably connected to the inner wall of one side of the purification chamber. Multiple air inlets II are provided on the inner wall of the purification chamber away from the flushing chamber.

[0017] When the drive shaft rotates, gear I drives gear II to rotate, which in turn drives the sealing plate to rise and fall through the arc groove, V-groove and pin to intermittently seal the air inlet II and prolong the ultraviolet irradiation time.

[0018] In one possible design, a UV photolysis catalytic oxidation device is fixedly mounted on the top of the housing, and multiple ultraviolet lamps are electrically connected to the UV photolysis catalytic oxidation device.

[0019] In the purification chamber, the ultraviolet lamps break down the molecular chains of organic waste gas, generating intermediate products that are then oxidized and decomposed into CO2 and H2O.

[0020] In one possible design, the alternating filter structure further includes four mesh plates, arranged in pairs, with each pair of mesh plates in the same group being bolted to the frame. The activated carbon is located between two mesh plates. The top of the frame extends slidably to the top of the housing. A rubber plate is fixedly provided on the top of the frame. A handle is fixedly provided on the top of the frame. A fixed shaft is fixedly provided on the top of the housing. A pressure plate is rotatably connected to the outer wall of the fixed shaft.

[0021] The pressure plate presses down on the rubber plate to limit the frame. When replacing the activated carbon, the frame is pulled out by the handle to prevent the exhaust gas from escaping.

[0022] In one possible design, an air duct plate is fixedly provided on the bottom inner wall of the flushing chamber, and the air duct plate is located on the side of the cone close to the isolation plate.

[0023] Among them, the air intake plate blocks the exhaust gas, preventing the exhaust gas from being discharged too early through the air intake hole I.

[0024] In one possible design, a plurality of fixed cylinders are fixedly provided on the inner wall of the purification chamber away from the rinsing chamber. Each of the fixed cylinders is slidably connected to a pull rod fixedly provided to the top of the sealing plate. The top of the pull rod is elastically connected to the top inner wall of the fixed cylinder by a spring.

[0025] Among them, the spring-assisted sealing plate resets to stabilize intermittent discharge.

[0026] In one possible design, a return pipe is also included, which is fixedly connected to the bottom inner wall of the flushing chamber;

[0027] The return pipe recovers the spray water for reuse.

[0028] This application discloses a method for treating air pollution in a printing workshop, comprising the following steps:

[0029] S1. Start the exhaust fan to draw the waste gas from the printing workshop into the housing through the gas collection hood. The waste gas enters the rinsing chamber through the air inlet pipe. Simultaneously start the motor to drive the drive shaft and cone to rotate. Use centrifugal force to throw the waste gas out along the outer surface of the cone and dilute it through the gas duct. Spray water mist from nozzle I to capture particulate matter, oil fumes and soluble organic matter in the waste gas. After condensation and accumulation, it is discharged through the return pipe.

[0030] S2. The exhaust gas flows upward through the cavity between the partition plate and the baffle plate via the inlet I; the nozzle II performs counter-current spraying, and the exhaust gas is sprayed a second time by the nozzle III when it enters the purification chamber through the inclined hole; the UV photolysis catalytic oxidation equipment is started, and the ultraviolet lamps break down the molecular chains of the exhaust gas to generate intermediate products and oxidize and decompose them into CO2 and H2O; simultaneously, the gear I drives the gear II to rotate, and the arc groove, V-groove and pin rod are linked to fix the rod, controlling the periodic lifting and lowering of the sealing plate to open and close the inlet II, thus extending the ultraviolet irradiation time.

[0031] S3. Residual pollutants are adsorbed by activated carbon and discharged through the exhaust pipe. When replacing saturated activated carbon, press the new activated carbon frame into the filter chamber, rotate the pressure plate to release the limit, and lift the old frame with the handle until the activated carbon is removed from the shell while the bottom of the frame is still stuck in the filter chamber to prevent exhaust gas leakage.

[0032] S4. The air intake plate blocks the exhaust gas from directly entering the air inlet I to ensure sufficient spraying; the spray liquid is discharged uniformly through the liquid return pipe after flowing through the liquid guide hole.

[0033] Beneficial effects: In this invention, a cone is fixed to one end of the drive shaft, two water pipes I are fixed inside the flushing chamber, and multiple nozzles I are fixed to the bottom of the water pipes I. Multiple air intake grooves are provided on the outer wall of the cone. The drive shaft and the cone are rotated by a motor. The exhaust gas flows along the outer surface of the cone under the action of the cone. The air intake grooves on the cone can make the exhaust gas overflow. In addition, the centrifugal force generated during the rotation of the cone throws the exhaust gas to all sides, making the exhaust gas that enters the flushing chamber overflow. The exhaust gas becomes thinner, which makes it easier for the water sprayed by the nozzles I to fully contact the exhaust gas in the later stage, so that the particulate matter, oil fumes and some soluble organic matter in the exhaust gas are captured by the water mist.

[0034] In this invention, a water pipe II is fixed inside the cavity, and multiple nozzles II are fixed at the bottom of the water pipe II. Multiple oblique holes are provided in the partition plate adjacent to the partition plate, and multiple nozzles III are fixed on the outer wall of the water pipe II. The pre-filtered exhaust gas enters the cavity between the partition plate and the adjacent partition plate through the air inlet I and flows upward. It enters the purification chamber through the oblique holes. When the exhaust gas moves upward, the water sprayed by the nozzles II can backwash the exhaust gas and further purify it. When the exhaust gas enters the purification chamber through the oblique holes, the water sprayed by the nozzles III can spray the exhaust gas that has entered the oblique holes again, thereby fully adsorbing particulate matter, oil fumes and some soluble organic matter in the exhaust gas.

[0035] In this invention, gear I is fixedly sleeved on the outer wall of the drive shaft, and gear II is rotatably connected to the inner wall of one side of the purification chamber. A track groove is provided on one side of gear II, and a pin is slidably fitted in the track groove. One end of the pin is fixed to a sealing plate by a fixing rod. When the motor drives the drive shaft to rotate, it synchronously drives gear I to rotate. Gear I drives gear II to rotate. The diameter of gear II is larger than that of gear I, and the rotational speed of gear II is lower than that of gear I. Through the cooperation of the arc groove, V-groove, and pin, gear II drives the fixing rod and sealing plate to rise and fall when gear II rotates one revolution, completing the sealing and opening of the air inlet II by the sealing plate, increasing the time that the exhaust gas is exposed to ultraviolet light, and improving the decomposition effect of ultraviolet light on the exhaust gas.

[0036] In this invention, the spray structure uses a rotating cone to dilute the overflowing exhaust gas, and multiple spray nozzles ensure that water fully contacts the exhaust gas, effectively capturing particulate matter and other pollutants. The intermittent structure of the purification chamber uses gear transmission to drive the lifting and lowering of the sealing plate, extending the time the exhaust gas is exposed to ultraviolet light and improving the decomposition effect. The alternating filtration structure allows for continuous replacement of activated carbon, preventing exhaust gas overflow and ensuring continuous filtration. The synergistic effect of these structures significantly improves the efficiency and quality of exhaust gas treatment. Attached Figure Description

[0037] Figure 1 A three-dimensional structural schematic diagram of an integrated waste gas treatment system for a printing workshop provided by the present invention;

[0038] Figure 2 A three-dimensional cross-sectional structural schematic diagram of an integrated exhaust gas treatment system for a printing workshop provided by the present invention;

[0039] Figure 3 This is a schematic diagram of the main sectional view of an integrated waste gas treatment system for a printing workshop provided by the present invention.

[0040] Figure 4 This is a three-dimensional exploded cross-sectional view of the air intake channel, drive shaft, and isolation plate of an integrated waste gas treatment system for a printing workshop provided by the present invention.

[0041] Figure 5 A three-dimensional structural diagram of water pipe I, water pipe II, and nozzle III of an integrated waste gas treatment system for a printing workshop provided by the present invention;

[0042] Figure 6 A three-dimensional exploded structural diagram of the protective cover and partition of the integrated exhaust gas treatment system for a printing workshop provided by the present invention;

[0043] Figure 7 A three-dimensional exploded structural diagram of the fixing rod, pin, and gear II of an integrated exhaust gas treatment system for a printing workshop provided by the present invention;

[0044] Figure 8 A three-dimensional exploded structural diagram of the fixed cylinder, spring, and pull rod of an integrated exhaust gas treatment system for a printing workshop provided by the present invention;

[0045] Figure 9 This is a three-dimensional exploded structural diagram of the frame, perforated plate, and rubber plate of an integrated waste gas treatment system for a printing workshop provided by the present invention.

[0046] In the diagram: 1. Shell; 2. Inlet pipe; 3. Exhaust pipe; 4. Exhaust fan; 5. Gas collection hood; 6. Partition plate; 7. Flushing chamber; 8. Purification chamber; 9. Filter chamber; 10. Isolation plate; 11. Drive shaft; 12. Cone; 13. Air intake groove; 14. Base; 15. Water pipe I; 16. Nozzle I; 17. Air intake plate; 18. Inlet port I; 19. Water pipe II; 20. Nozzle II; 21. Angled hole; 22. Nozzle III; 23. Liquid guide hole; 24. Return pipe; 25. Ultraviolet lamp tube; 26. UV photolysis catalytic oxidation equipment; 27. Air inlet II; 28. Gear I; 29. ​​Gear II; 30. Arc groove; 31. V-groove; 32. Pin; 33. Fixing rod; 34. Sealing plate; 35. Protective cover; 36. Fixing cylinder; 37. Pull rod; 38. Spring; 39. Liquid injection pipe; 40. Frame; 41. Mesh plate; 42. Activated carbon; 43. Rubber plate; 44. Handle; 45. Fixing shaft; 46. Pressure plate. Detailed Implementation

[0047] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0048] In one embodiment: Refer to Figures 1-9 The waste gas treatment system relates to the field of waste gas purification and treatment technology. It is mainly composed of a shell 1, an air inlet pipe 2, an exhaust pipe 3, an induced draft fan 4, a gas collection hood 5, a flushing chamber 7, a purification chamber 8, a filter chamber 9, a spray structure, an intermittent structure, an alternating filter structure, an ultraviolet lamp tube 25, and a UV photolysis catalytic oxidation device 26.

[0049] Reference Figures 1-3The casing 1 is the main structure of the entire waste gas treatment system. It is made of high-strength, corrosion-resistant materials to ensure it is not corroded by corrosive substances in the waste gas during long-term use. The casing 1 is rectangular in shape, and its interior is divided from left to right by two partitions 6 to form a flushing chamber 7, a purification chamber 8, and a filtration chamber 9. An inlet pipe 2 and an exhaust pipe 3 are fixed to both ends of the casing 1, respectively. The inlet pipe 2 and exhaust pipe 3 are made of circular steel pipes, and their diameters are designed according to the waste gas treatment volume and flow rate requirements to ensure smooth injection and discharge of waste gas. The inlet pipe 2 and exhaust pipe 3 are connected to the flushing chamber 7 and the filtration chamber 9, respectively.

[0050] Reference Figure 1 The induced draft fan 4 is installed on one side of the housing 1, and its outlet end is connected to the inlet pipe 2 via a pipe. The inlet end is fixedly connected to the gas collection hood 5 via a pipe. The gas collection hood 5 is located inside the printing workshop and is shaped like a trumpet. It can effectively collect the waste gas in the printing workshop and discharge it into the housing 1 for treatment through the pipe under the action of the induced draft fan 4. The power of the induced draft fan 4 is selected according to the waste gas treatment volume and system resistance to ensure that it can provide sufficient power to make the waste gas flow in the system.

[0051] Reference Figures 2-5 The rinsing chamber 7 is located on the left side of the housing 1, and its interior is equipped with a spray structure. The spray structure includes components such as a partition plate 10, a drive shaft 11, a cone 12, an air intake plate 17, water pipe I 15, water pipe II 19, nozzle I 16, nozzle II 20, and nozzle III 22. The partition plate 10 is fixed inside the rinsing chamber 7, dividing the rinsing chamber 7 into two areas. The drive shaft 11 is rotatably mounted inside the rinsing chamber 7, with one end extending rotatably into the purification chamber 8 and rotatably connected to the corresponding partition plate 6. The rotation of the drive shaft 11 is driven by a motor, which is mounted outside the housing 1 and connected to the drive shaft 11 via a coupling. The cone 12 is fixed at the end of the drive shaft 11 near the air inlet pipe 2. The cone 12 is cone-shaped, and its outer wall is provided with multiple air intake grooves 13. When the exhaust gas enters the flushing chamber 7 from the air inlet pipe 2, under the action of the cone 12, the exhaust gas flows along the outer surface of the cone 12. The air duct 13 can make the exhaust gas overflow. At the same time, the centrifugal force generated during the rotation of the cone 12 throws the exhaust gas out in all directions, making the exhaust gas in the flushing chamber 7 overflow and become thinner, so that the water sprayed by the nozzles can fully contact the exhaust gas in the later stage.

[0052] Reference Figure 2 , Figure 3 and Figure 5There are two water pipes I15, fixed inside the flushing chamber 7 and located on the side of the partition plate 10 away from the adjacent partition plate 6, and between the cone 12 and the partition plate 10. Multiple nozzles I16 are fixed to the bottom of the water pipes I15. The nozzles I16 are atomizing nozzles, capable of atomizing water into fine droplets, increasing the contact area between the water and the exhaust gas. When the cone 12 throws the exhaust gas outwards, the water sprayed by the nozzles I16 can fully contact the exhaust gas, allowing particulate matter, fumes, and some soluble organic matter in the exhaust gas to be captured by the water mist.

[0053] Reference Figure 2 , Figure 3 and Figure 5 Water pipe II19 is fixed in the cavity between partition plate 10 and adjacent partition plate 6. Multiple nozzles II20 are fixed to the bottom of water pipe II19. When the exhaust gas in the cavity rises, the water sprayed by nozzles II20 further purifies the exhaust gas. Multiple nozzles III22 are also fixed to the outer wall of water pipe II19. The nozzles III22 correspond to the positions of the inclined holes 21 and are inclined, with their spray nozzles facing the inclined holes 21. The pre-filtered exhaust gas enters the cavity between partition plate 10 and adjacent partition plate 6 through air inlet I18 and flows upwards, entering the purification chamber 8 through the inclined holes 21. When the exhaust gas rises, the water sprayed by nozzles II20 backwashes the exhaust gas, further purifying it. When the exhaust gas enters the purification chamber 8 through the inclined holes 21, the water sprayed by nozzles III22 sprays the exhaust gas again, thus effectively adsorbing particulate matter, fumes, and some soluble organic matter in the exhaust gas.

[0054] Reference Figures 2-4 The partition plate 10 is provided with an air inlet I18 for discharging the sprayed exhaust gas to one side. The partition plate 6 adjacent to the partition plate 10 is provided with multiple inclined holes 21. The flushing chamber 7 is connected to the purification chamber 8 through the inclined holes 21 for discharging the sprayed exhaust gas into the purification chamber 8.

[0055] Reference Figures 2-4 A base 14 is fixed to the bottom inner wall of the flushing chamber 7. One end of the drive shaft 11 rotates through the base 14. The function of the base 14 is to make the rotation of the drive shaft 11 more stable and reduce vibration and wear during rotation. A return pipe 24 is fixedly connected to the bottom inner wall of the flushing chamber 7. The return pipe 24 is used to recover the sprayed water. The recovered water can be treated and recycled to save water resources.

[0056] Reference Figures 1-3The purification chamber 8 is located in the middle part of the shell 1. Two sets of ultraviolet lamps 25 are fixed on the top inner wall and the bottom inner wall, respectively. The ultraviolet lamps 25 are electrically connected to the UV photolysis catalytic oxidation device 26. The UV photolysis catalytic oxidation device 26 controls the ultraviolet lamps 25 to emit ultraviolet light (50W power per lamp, wavelength 185-254nm). The ultraviolet light breaks down the molecular chains of organic waste gas, generating intermediate products (such as ozone and hydroxyl radicals), which are further oxidized and decomposed into CO2 and H2O.

[0057] Reference Figure 2 , Figure 3 , Figure 6 and Figure 7 An intermittent structure is installed within the purification chamber 8 to intermittently discharge exhaust gas from the purification chamber 8 into the filter chamber 9, increasing the time for ultraviolet irradiation of the exhaust gas. The intermittent structure includes components such as gear I 28, gear II 29, a track groove, pin 32, fixing rod 33, and a sealing plate 34. Gear I 28 is fixedly sleeved on the outer wall of the drive shaft 11 and located within the purification chamber 8. Gear II 29 is rotatably connected to the inner wall of the purification chamber 8 away from the flushing chamber 7. Gear II 29 meshes with gear I 28, and the diameter of gear II 29 is larger than that of gear I 28, therefore the rotational speed of gear II 29 is lower than that of gear I 28. A track groove is provided on one side of gear II 29, consisting of an arc-shaped groove 30 and a V-shaped groove 31. Pin 32 is slidably fitted within the track groove, and a fixing rod 33 is fixed to one end of pin 32. A sealing plate 34 is fixed to one side of the fixing rod 33, and the sealing plate 34 is slidably connected to one side of the inner wall of the purification chamber 8. The inner wall of the purification chamber 8 away from the flushing chamber 7 is provided with multiple air inlets II27, which are used to discharge the exhaust gas in the purification chamber 8 into the filter chamber 9. The sealing plate 34 cooperates with the air inlets II27 to control the discharge of exhaust gas.

[0058] When the motor drives the drive shaft 11 to rotate, it synchronously drives gear I 28 to rotate. Gear I 28 then drives gear II 29 to rotate. Gear II 29, through the cooperation of the arc groove 30, V-groove 31, and pin 32, drives the fixed rod 33 and the sealing plate 34 to rise and fall when gear II 29 rotates one revolution, thus completing the closing and opening of the air inlet II 27 by the sealing plate 34. When the sealing plate 34 closes the air inlet II 27, the time that the exhaust gas stays in the purification chamber 8 is extended, increasing the time that the exhaust gas is exposed to ultraviolet light and improving the decomposition effect of ultraviolet light on the exhaust gas.

[0059] Reference Figure 6 and Figure 8A protective cover 35 is fixed to the inner wall of the purification chamber 8 on the side away from the flushing chamber 7. The protective cover 35 is made of transparent material and its function is to protect gear I 28, gear II 29, and pin 32, preventing particulate matter and other impurities in the exhaust gas from entering the mating parts of the gears and pin 32 and affecting the normal operation of the intermittent structure. Multiple fixed cylinders 36 are fixed to the inner wall of the purification chamber 8 on the side away from the flushing chamber 7. Each fixed cylinder 36 has a slidingly connected pull rod 37 that is fixedly connected to the top of the sealing plate 34. The top of the pull rod 37 is connected to the inner wall of the top of the fixed cylinder 36 by a spring 38. The spring 38 is a tension spring with an elastic coefficient ranging from 50-150 N / mm and a preload ranging from 10-50 N. The tension spring provides a certain buffer and restoring force during the lifting and lowering of the sealing plate 34, ensuring the smoothness and accuracy of the movement of the sealing plate 34.

[0060] Reference Figure 2 , Figure 3 and Figure 9 The filter chamber 9 is located on the right side of the housing 1, and its interior is equipped with an alternating filtration structure for continuous filtration of exhaust gas. The alternating filtration structure includes two alternating frames 40, four perforated plates 41, activated carbon 42, rubber plate 43, handle 44, fixed shaft 45, pressure plate 46, and other components. The four perforated plates 41 are arranged in pairs, and the two perforated plates 41 in the same pair are bolted to the frame 40.

[0061] Reference Figure 2 , Figure 3 and Figure 9 Both frames 40 are rectangular in shape, and activated carbon 42 is installed inside them through two perforated plates 41, with the activated carbon 42 located between the two perforated plates 41. The perforated plates 41 are made of stainless steel and have evenly distributed small holes, which can ensure the passage of exhaust gas while preventing the activated carbon 42 from leaking. The top of the frame 40 extends to the top of the housing 1 in a sealing sliding manner. A rubber plate 43 is fixed to the top of the frame 40, located at the top of the housing 1, to increase the sealing between the activated carbon 42 and the housing 1 and prevent exhaust gas leakage. A handle 44 is fixed to the top of the frame 40, and the handle 44 passes through the rubber plate 43, making it convenient for operators to replace the activated carbon 42. A fixing shaft 45 is fixed to the top of the housing 1, located between the two frames 40. A pressure plate 46 is rotatably connected to the outer wall of the fixing shaft 45, which is used to press the corresponding rubber plate 43 and limit the frame 40.

[0062] When the activated carbon 42 needs to be replaced due to saturation, push the new activated carbon 42 and the corresponding frame 40 downwards and extend them into the filter chamber 9. Then, rotate the pressure plate 46 to release the obstruction of the activated carbon 42. Use the handle 44 to pull the activated carbon 42 and the frame 40 upwards until the activated carbon 42 moves to the top of the housing 1, while the bottom of the frame 40 remains inside the filter chamber 9 to prevent exhaust gas from escaping. Exhaust gas enters the filter chamber 9 through the air inlet II 27, and after being filtered by the activated carbon 42, it is discharged to the outside through the exhaust pipe 3.

[0063] Reference Figure 5 One side of the housing 1 is equipped with a liquid injection pipe 39. One end of the liquid injection pipe 39 is connected to an external water source, and the other end is fixedly connected to water pipe II 19 and two water pipes I 15 via a flexible hose, which is used to provide water to nozzles I 16, II 20 and III 22. A flow control valve is installed on the liquid injection pipe 39, which can adjust the water flow according to the amount of waste gas treated and the spraying requirements, ensuring the spraying effect while avoiding water waste.

[0064] In another embodiment: Refer to Figures 2-4 An improvement upon Example 1: The air intake plate 17 is fixed to the bottom inner wall of the flushing chamber 7 and located on the side of the cone 12 closest to the partition plate 10. The function of the air intake plate 17 is to block the exhaust gas located below when the cone 12 throws the exhaust gas outwards, preventing the exhaust gas located below from being discharged to one side through the air inlet I 18, ensuring that the exhaust gas can be fully sprayed. Both the air intake plate 17 and the partition plate 10 are provided with multiple liquid guiding holes 23. The function of the liquid guiding holes 23 is to collect the water sprayed by the nozzles I 16, II 20 and III 22 towards the return pipe 24, facilitating subsequent discharge and recycling.

[0065] An integrated exhaust gas treatment system and air pollution treatment method for a printing workshop include the following steps:

[0066] S1. The exhaust gas in the printing workshop is discharged into the shell 1 by the cooperation of the exhaust fan 4 and the gas collection hood 5. The exhaust gas is filtered by the spray in the flushing chamber 7, the ultraviolet oxidation decomposition in the purification chamber 8, and the activated carbon 42 in the filter chamber 9 to achieve a multi-stage purification effect, thereby completing the purification treatment of the exhaust gas.

[0067] S2. When the exhaust gas enters the flushing chamber 7 through the inlet pipe 2, the drive shaft 11 and the cone 12 are rotated by the motor. Under the action of the cone 12, the exhaust gas flows along the outer surface of the cone 12, and the air intake groove 13 on the cone 12 can allow the exhaust gas to overflow. In addition, the centrifugal force generated during the rotation of the cone 12 throws the exhaust gas outwards, causing the exhaust gas entering the flushing chamber 7 to overflow and become thinner, which facilitates the water sprayed by the nozzle I 16 to fully contact the exhaust gas in the later stage, so that the particulate matter, oil fumes and some soluble organic matter in the exhaust gas are captured by the water mist, and then cold condensation occurs. After collection, the waste gas is discharged to the outside through the return pipe 24. The pre-filtered waste gas enters the cavity between the isolation plate 10 and the adjacent isolation plate 6 through the air inlet I 18 and flows upward. It enters the purification chamber 8 through the inclined hole 21. When the waste gas moves upward, the water sprayed by the nozzle II 20 can backwash the waste gas and further purify it. When the waste gas enters the purification chamber 8 through the inclined hole 21, the water sprayed by the nozzle III 22 can spray the waste gas that has entered the inclined hole 21 again, so as to fully adsorb particulate matter, oil fumes and some soluble organic matter in the waste gas.

[0068] S3. After the exhaust gas enters the purification chamber 8, the UV photocatalytic oxidation device 26 controls the ultraviolet lamp tube 25 to emit ultraviolet light. The ultraviolet light breaks down the molecular chain of organic waste gas, generating intermediate products (such as ozone and hydroxyl radicals), which are further oxidized and decomposed into CO2 and H2O. When the motor drives the drive shaft 11 to rotate, it synchronously drives the gear I 28 to rotate. The gear I 28 drives the gear II 29 to rotate. The diameter of the gear II 29 is larger than that of the gear I 28, and the rotation speed of the gear II 29 is lower than that of the gear I 28. The gear II 29, through the cooperation of the arc groove 30, the V-groove 31, and the pin 32, drives the fixed rod 33 and the sealing plate 34 to rise and fall when the gear II 29 rotates one revolution. This completes the sealing and opening of the air inlet hole II 27 by the sealing plate 34, increasing the time that the exhaust gas is exposed to ultraviolet light and improving the decomposition effect of ultraviolet light on the exhaust gas.

[0069] S4. Exhaust gas enters the filter chamber 9 through the air inlet II 27. After being filtered by activated carbon 42, it is discharged to the outside through the exhaust pipe 3. When the activated carbon 42 is saturated and needs to be replaced, the new activated carbon 42 and the corresponding frame 40 are pushed down and extended into the filter chamber 9. Then, the pressure plate 46 is rotated to release the obstruction of the activated carbon 42. The activated carbon 42 to be replaced and the frame 40 are pulled up through the handle 44 until the activated carbon 42 is moved to the top of the housing 1. The bottom of the frame 40 is still located in the filter chamber 9 to prevent the exhaust gas in the filter chamber 9 from overflowing.

[0070] S5. When the cone 12 rotates and throws the exhaust gas out in all directions, the exhaust plate 17 can block the exhaust gas located below, preventing the exhaust gas from being discharged directly through the air inlet I 18, so that the exhaust gas cannot be fully washed by the water sprayed from the nozzle I 16. In addition, the liquid guide hole 23 provided on the blower 4 and the isolation plate 10 can make the sprayed water flow together and be discharged to the outside through the return pipe 24.

[0071] As is known to those skilled in the art, the operating principles and circuit connections of the induced draft fan 4, the UV photocatalytic oxidation device 26, and the ultraviolet lamp 25 are all conventional technical methods. Given that the above technical features fall within the scope of common technical knowledge in this field, specific implementation methods can be configured according to actual needs and existing technical literature, and will not be described in detail here.

[0072] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0073] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An integrated waste gas treatment system for a printing workshop, characterized in that, Includes a housing (1), inside which two partitions (6) are fixed. The housing (1) forms a flushing chamber (7), a purification chamber (8) and a filter chamber (9) through the two partitions (6). An air inlet pipe (2) and an exhaust pipe (3) are fixed at both ends of the housing (1). The air inlet pipe (2) is connected to the flushing chamber (7), and the exhaust pipe (3) is connected to the filter chamber (9). The flushing chamber (7) is provided with a spray structure, which includes a drive shaft (11) rotatably connected in the flushing chamber (7) and a cone (12) fixedly disposed at one end of the drive shaft (11). The cone (12) cooperates with the air inlet pipe (2). The end of the drive shaft (11) away from the cone (12) extends rotatably into the purification chamber (8) and is rotatably connected to the corresponding partition (6). It also includes multiple ultraviolet lamps (25), which are divided into two groups and fixedly installed on the top inner wall and bottom inner wall of the purification chamber (8). The purification chamber (8) is provided with an intermittent structure; It also includes an alternating filtration structure, which includes two alternately used frames (40), each of which contains activated carbon (42); When the drive shaft (11) rotates, the cone (12) throws the exhaust gas out to all sides, making the exhaust gas thinner and easier to spray; the intermittent structure controls the intermittent emission of exhaust gas to prolong the time of ultraviolet irradiation of exhaust gas; activated carbon (42) is used alternately to continuously filter exhaust gas.

2. The integrated waste gas treatment system for a printing workshop according to claim 1, characterized in that, The spray structure also includes a partition plate (10) fixedly disposed in the flushing chamber (7). Two water pipes I (15) are fixedly disposed in the flushing chamber (7). The two water pipes I (15) are located on the side of the partition plate (10) away from the adjacent partition plate (6). The two water pipes I (15) are located between the cone (12) and the partition plate (10). Multiple nozzles I (16) are fixedly disposed at the bottom of the water pipes I (15). Multiple air intake grooves (13) are provided on the outer wall of the cone (12). An air inlet I (18) is provided in the partition plate (10). When the drive shaft (11) rotates, the cone (12) disperses and throws out the exhaust gas through the air intake groove (13), making the exhaust gas thinner, and the water sprayed by the nozzle I (16) fully contacts the exhaust gas to capture particulate matter, oil fumes and soluble organic matter.

3. The integrated waste gas treatment system for a printing workshop according to claim 2, characterized in that, The spray structure also includes a cavity, which is disposed between the isolation plate (10) and the adjacent partition plate (6). A water pipe II (19) is fixedly disposed in the cavity. Multiple nozzles II (20) are fixedly disposed at the bottom of the water pipe II (19). Multiple oblique holes (21) are provided in the partition plate (6) adjacent to the isolation plate (10). Multiple nozzles III (22) are fixedly disposed on the outer wall of the water pipe II (19). The nozzles III (22) are positioned corresponding to the oblique holes (21). The nozzles III (22) are inclined and the spray nozzles face the oblique holes (21). When the exhaust gas enters the cavity through the air inlet I (18) and moves upward, the nozzle II (20) backwashes the exhaust gas; when the exhaust gas passes through the oblique hole (21), the nozzle III (22) sprays again to fully adsorb pollutants.

4. The integrated waste gas treatment system for a printing workshop according to claim 3, characterized in that, The intermittent structure includes gear I (28), which is fixedly sleeved on the outer wall of the drive shaft (11) and located in the purification chamber (8). Gear II (29) is rotatably connected to the inner wall of the purification chamber (8) away from the flushing chamber (7). Gear II (29) meshes with gear I (28). A track groove is provided on one side of gear II (29). The track groove is composed of an arc groove (30) and a V-shaped groove (31). A pin (32) is slidably fitted in the track groove. A fixing rod (33) is fixedly provided at one end of the pin (32). A sealing plate (34) is fixedly provided on one side of the fixing rod (33). The sealing plate (34) is slidably connected to the inner wall of one side of the purification chamber (8). Multiple air inlets II (27) are provided on the inner wall of the purification chamber (8) away from the flushing chamber (7). When the drive shaft (11) rotates, gear I (28) drives gear II (29) to rotate, and drives the sealing plate (34) to rise and fall through the arc groove (30), V groove (31) and pin (32) to intermittently seal the air inlet II (27) and prolong the ultraviolet irradiation time.

5. The integrated waste gas treatment system for a printing workshop according to claim 4, characterized in that, A UV photolysis catalytic oxidation device (26) is fixedly installed on the top of the housing (1), and multiple ultraviolet lamps (25) are electrically connected to the UV photolysis catalytic oxidation device (26). In the purification chamber (8), the ultraviolet lamp (25) breaks down the molecular chain of organic waste gas, generates intermediate products, and oxidizes and decomposes them into CO2 and H2O.

6. The integrated waste gas treatment system for a printing workshop according to claim 5, characterized in that, The alternating filtration structure also includes four mesh plates (41), which are arranged in pairs. The two mesh plates (41) in the same pair are installed in the frame (40) by bolts. The activated carbon (42) is located between the two mesh plates (41). The top of the frame (40) extends to the top of the shell (1) in a sealed sliding manner. A rubber plate (43) is fixedly provided on the top of the frame (40). A handle (44) is fixedly provided on the top of the frame (40). A fixed shaft (45) is fixedly provided on the top of the shell (1). A pressure plate (46) is rotatably connected to the outer wall of the fixed shaft (45). The pressure plate (46) presses the rubber plate (43) to limit the frame (40). When replacing the activated carbon (42), the frame (40) is pulled out by the handle (44) to prevent the exhaust gas from escaping.

7. The integrated waste gas treatment system for a printing workshop according to claim 6, characterized in that, An air duct plate (17) is fixedly provided on the bottom inner wall of the flushing chamber (7), and the air duct plate (17) is located on the side of the cone (12) near the isolation plate (10); Among them, the air intake plate (17) blocks the exhaust gas to prevent the exhaust gas from being discharged too early through the air inlet I (18).

8. The integrated waste gas treatment system for a printing workshop according to claim 7, characterized in that, Multiple fixed cylinders (36) are fixedly provided on the inner wall of the purification chamber (8) away from the flushing chamber (7). Each of the multiple fixed cylinders (36) is slidably connected to a pull rod (37) fixedly provided to the top of the sealing plate (34). The top of the pull rod (37) is elastically connected to the top inner wall of the fixed cylinder (36) by a spring (38). Among them, the spring (38) assists the closing plate (34) in resetting to stabilize intermittent discharge.

9. The integrated waste gas treatment system for a printing workshop according to claim 8, characterized in that, It also includes a return pipe (24), which is fixedly connected to the bottom inner wall of the flushing chamber (7); Among them, the return pipe (24) recovers the spray water for recycling.

10. A method for treating air pollution in a printing workshop, applied to the integrated waste gas treatment system for a printing workshop as described in claim 9, characterized in that, Includes the following steps: S1. Start the exhaust fan (4) to draw the exhaust gas from the printing workshop into the housing (1) through the gas collection hood (5). The exhaust gas enters the flushing chamber (7) through the air inlet pipe (2). Simultaneously start the motor to drive the drive shaft (11) and the cone (12) to rotate. Use centrifugal force to throw the exhaust gas out along the outer surface of the cone (12) and dilute it through the air duct (13). Spray water mist from nozzle I (16) to capture particulate matter, oil fumes and soluble organic matter in the exhaust gas. After condensation and accumulation, it is discharged through the return pipe (24). S2. After being blocked by the air intake plate (17), the pre-purified exhaust gas enters the cavity between the partition plate (10) and the partition plate (6) through the air inlet I (18) and flows upward. The nozzle II (20) performs counter-current spraying. When the exhaust gas enters the purification chamber (8) through the inclined hole (21), it is sprayed twice by the nozzle III (22). The UV photolysis catalytic oxidation equipment (26) is started. The ultraviolet lamp tube (25) decomposes the molecular chain of the exhaust gas to generate intermediate products and oxidizes and decomposes them into CO2 and H2O. At the same time, the gear I (28) drives the gear II (29) to rotate. Through the arc groove (30), V groove (31) and pin (32) linkage fixing rod (33), the closing plate (34) is controlled to periodically rise and fall to open and close the air inlet II (27) and extend the ultraviolet irradiation time. S3. After purification, the exhaust gas enters the filter chamber (9) through the air inlet II (27), and the residual pollutants are adsorbed by the activated carbon (42) and then discharged through the exhaust pipe (3). When replacing the saturated activated carbon, press the new activated carbon frame (40) down into the filter chamber (9), rotate the pressure plate (46) to release the limit, and lift the old frame up through the handle (44) until the activated carbon (42) is removed from the shell (1), while the bottom of the frame (40) is still stuck in the filter chamber (9) to prevent exhaust gas leakage. S4. When the cone (12) rotates and diffuses the exhaust gas, the air intake plate (17) blocks the exhaust gas from passing directly through the air inlet hole I (18) to ensure sufficient spraying; the spray liquid is discharged uniformly through the return pipe (24) after flowing through the liquid guide hole (23).

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