Baking line waste gas treatment system and method

Abstract

The invention discloses a baking line waste gas treatment system and method, and relates to the field of waste gas treatment.The baking line waste gas treatment system comprises a furnace section chimney used for outputting waste gas, one end of the furnace section chimney is connected with a mixing buffer box through a pipeline, and a plurality of electric adjusting air doors are arranged between the furnace section chimney and the mixing buffer box; a plurality of heat exchangers are arranged on the two sides of the mixing buffer tank in a butt joint mode, induced draft fans used for conveying gas are arranged on the tops of the heat exchangers, flow dividing buffer tanks are arranged at the ends, away from the heat exchangers, of the induced draft fans, and spraying packed towers used for cooling and filtering the gas are arranged at the ends, away from the induced draft fans, of the flow dividing buffer tanks. A circulation cavity is formed in the middle of the spraying packed tower, a plurality of activated carbon layers for filtering waste gas are arranged at the top in the circulation cavity, and a plurality of spraying layers for cooling the waste gas are arranged on the other side of the activated carbon layers in the circulation cavity. The waste gas temperature is reduced, so that the working efficiency of activated carbon in contact with the waste gas is improved, and the standard exceeding risk of pollutants is reduced.

Description

Technical Field

[0001] The present invention relates to the field of waste gas treatment, and in particular to a baking line waste gas treatment system and method. Background Art

[0002] The existing biscuit drying lines usually use 3 northern lines, LINE11, LINE12, and LINE13; and 2 southern lines, LINE16 and LINE17. After being collected and aggregated, the drying exhaust gas enters 5 flue gas heat exchangers for heat exchange, and the cooled exhaust gas is discharged through the induced draft fan. LINE11, LINE12, and LINE13 are combined into one line through the buffer box and enter the subsequent northern line exhaust gas treatment line; LINE16 and LINE17 are combined into one line through the buffer box and enter the subsequent southern line exhaust gas treatment line. The northern and southern exhaust gas treatment lines are respectively composed of a two-stage packing spray tower and an activated carbon box. The clean flue gas after washing and absorption is finally discharged through a 15m chimney.

[0003] At present, due to the excessively high waste gas temperature at the inlet of the activated carbon box, the activated carbon cannot work within the optimal temperature range, which greatly affects the working efficiency of the activated carbon and puts the pollutants at risk of exceeding the standard. At the same time, the biscuit drying lines in the north and south areas are about to be expanded, and the waste gas treatment line should also be expanded to match the capacity after the transformation to meet the waste gas treatment capacity after the expansion. Summary of the invention

[0004] In order to improve the problem that the waste gas temperature of the existing conventional waste gas drying waste gas treatment system is too high, which reduces the working efficiency of activated carbon and thus increases the risk of pollutants exceeding the standard, the present invention provides a baking line waste gas treatment system and method.

[0005] The present invention provides a baking line waste gas treatment system and method using the following technical solutions: A baking line waste gas treatment system, comprising a plurality of furnace section chimneys for outputting waste gas, one end of each of the plurality of furnace section chimneys is connected to a mixing buffer box through a pipeline, a plurality of electric regulating dampers are arranged between the pipelines of each of the plurality of furnace section chimneys and the mixing buffer box, a plurality of heat exchangers are arranged at both sides of the mixing buffer box, a plurality of induced draft fans for transmitting gas are arranged on the top of each of the plurality of heat exchangers, a plurality of induced draft fans are arranged at one end away from the heat exchanger with a shunt buffer box, and a plurality of shunt buffer boxes are arranged at one end away from the induced draft fan with a spray packing tower for cooling and filtering the gas; A circulation chamber is arranged in the middle of the spray packing tower, a plurality of activated carbon layers for filtering exhaust gas are arranged on the top of the circulation chamber, a plurality of spray layers for cooling exhaust gas are arranged on the other side of the activated carbon layer in the circulation chamber, a filling layer is arranged between the plurality of spray layers, an outlet pipe is arranged at the bottom of the circulation chamber passing through the spray packing tower, an inlet pipe connected to the inside of the spray packing tower is arranged on the top of the outlet pipe, a wastewater discharge pipe connected to the outside is arranged at one end of the inlet pipe away from the spray packing tower, and an openable and closable on-off valve is arranged in the middle of the inlet pipe and the wastewater discharge pipe.

[0006] By adopting the above technical scheme, the exhaust gas is input into the mixing buffer box from the chimney of the furnace section for preliminary circulation, and then input into the heat exchanger for preliminary cooling. The cooled exhaust gas is drawn by the induced draft fan to the diversion buffer box to divert the exhaust gas from the north and south lines, and respectively transported to two spray packing towers for defogger and cooling processes. Finally, the exhaust gas passes through multiple activated carbon layers for filtration, reducing the internal pollutant content and discharging it to the outside, effectively reducing the temperature of the exhaust gas in contact with the activated carbon layer, thereby improving the working efficiency of the activated carbon layer and reducing the risk of pollutants.

[0007] Preferably, an annular outer ring body is inserted into the inner wall of the circulation cavity between the activated carbon layer and the spray layer, an annular groove is opened in the middle of the inner wall of the outer ring body, and multiple auxiliary ports are opened through the upper and lower ends of the annular groove.

[0008] By adopting the above technical solution, the outer ring body is inserted into the inner wall of the circulation cavity to maintain longitudinal fixation, thereby providing support for the subsequent fixation of the inner shell. At the same time, the annular groove opened on the inner surface of the outer ring body provides activity space for the subsequent rotation of the inner shell and maintains the limit.

[0009] Preferably, an inner shell is rotatably provided on the inner wall of the outer ring body, a ring block is protrudingly provided on the outer surface of the inner shell at the position of the ring groove, the ring block is movably abutted against the ring groove, and auxiliary ports 2 are provided on the surface of the ring block at the positions of multiple auxiliary ports 1.

[0010] By adopting the above technical solution, the ring block is fixed on the outer surface of the inner shell body and movably abuts against the annular groove. When the inner shell body receives thrust, the ring block rotates along the annular groove, so that the inner shell body as a whole rotates inside the outer ring body. When the inner shell body rotates and drives the multiple auxiliary ports 2 to align with the multiple auxiliary ports 1, a connection is formed, thereby assisting in discharging the treated gas in the circulation cavity.

[0011] Preferably, an inclined surface is opened inwardly on the top of the inner shell, and a plurality of guide arc blocks are arranged around the surface of the inclined surface. The part of the inlet pipe connected to the spray packing tower is provided with a tapered nozzle for increasing water pressure, and the tapered nozzle is located obliquely above the guide arc block to increase the impact force.

[0012] By adopting the above technical solution, the tapered nozzle increases the flow rate of the filtrate introduced by the inlet pipe, so that the filtrate contacts the arc surface of the guide arc block, and the inclined surface applies thrust to the entire inner shell, so that the inner shell is located inside the outer ring body and rotates. At the same time, the filtrate is transported downward by the inclined surface to increase the flow rate, thereby increasing the output rate of the filtrate.

[0013] Preferably, slots connected to the outside are provided at the positions of the multiple activated carbon layers and the outer ring body in the circulation cavity, and disassembly plates are movably inserted in the multiple slots. The multiple disassembly plates are fixedly connected to the multiple activated carbon layers and the outer surface of the outer ring body in turn.

[0014] By adopting the above technical solution, multiple disassembly plates are respectively fixed to the activated carbon layer and the outer ring body, and the disassembly plate part located outside the spray packing tower is pulled, so that the disassembly plate is pulled out of the slot, and the multiple activated carbon layers and the outer ring body are pulled out simultaneously, so as to facilitate the cleaning and maintenance of the inner shell inside the activated carbon layer and the outer ring body.

[0015] Preferably, the inner shell is provided with a temporary storage cavity inwardly at the bottom of the inclined surface, and a plurality of conical spray holes are provided at the bottom of the temporary storage cavity and penetrate through the inner shell.

[0016] By adopting the above technical solution, the temporary storage chamber receives the filtrate flowing in from the inclined surface, and transports it downward to the top of the spray layer through multiple spray holes. The conical spray holes increase the pressure of the filtrate transportation from the small holes on the top, and then diffuse it through the perforations at the bottom, thereby increasing the diffusion area and output speed of the filtrate.

[0017] Preferably, a supporting cone rod is fixedly provided at the bottom of the spray filling tower, the top of the supporting cone rod is inserted through the spray layer and the filling layer and is arranged in a cone shape, and a liquid storage groove is opened downward at the top of the cone, and the liquid storage groove is aligned with the center of the inner shell.

[0018] By adopting the above technical solution, the cone at the top of the supporting cone rod diverts the gas transmitted from the spray layer, thereby increasing the gas flow distance and improving the spraying time of the gas and the filtrate. At the same time, the liquid storage tank opened at the top of the supporting cone rod receives the filtrate output by the shrinking nozzle and partially stores it. When the gas contacts the conical surface at the top of the supporting cone rod, the contact surface receives the bottom of the stored filtrate conduction, thereby improving the gas cooling effect.

[0019] Preferably, a circulation mechanism for providing suction force is provided in the middle of the outlet pipe, and an access end of the circulation mechanism is connected to an external power supply mechanism circuit.

[0020] By adopting the above technical solution, the circulation mechanism is connected to the external power supply mechanism to generate suction, extract the filtered water transmitted from the outlet pipe, and then transport it to the inlet pipe and the wastewater discharge pipe, providing power for the circulation of the filtered water and the discharge of the wastewater.

[0021] Preferably, a through opening is provided at the top of the circulation cavity through the spray packing tower, and a discharge chimney is fixedly provided on the through opening surface of the spray packing tower.

[0022] By adopting the above technical solution, the chimney is connected to the flow cavity, so that the gas filtered by the activated carbon layer is discharged and transported to the outside.

[0023] A method for manufacturing a cosmetic bottle by a blow molding device, comprising the following steps: S01. The high-temperature exhaust gas discharged from the drying lines of the north and south lines is discharged from the output end of the furnace section chimney and transported to the mixing buffer box through multiple pipes to adjust the flow. During the transportation process in the furnace section chimney, the flow delivery is automatically regulated by the electric regulating dampers in the middle of multiple pipes to form an opening and closing, so as to avoid positive pressure fire extinguishing caused by pressure imbalance. Then, the output end of the mixing buffer box is connected to multiple pipes to divert the internal exhaust gas, and multiple heat exchangers are connected accordingly. The exhaust gas enters the heat exchanger for cooling, and is then drawn into the diversion buffer box by the induced draft fan to form a secondary slow flow. Finally, the exhaust gas is transported from the diversion buffer box to the spray packing tower for purification and demisting.

[0024] S02. The circulation mechanism introduces external filtrate and transports it to the flow chamber through the introduction pipe. With the input of the filtrate, it flows into the temporary storage chamber from the inclined surface and sprays downward from multiple spray holes. The filtrate within the liquid storage tank fills the liquid storage tank. When the liquid storage tank is filled, it overflows along the top surface of the supporting cone rod and flows downward. The remaining filtrate sprays downward and is transported to the spray layer.

[0025] S03. The exhaust gas entering the diversion buffer box flows upward in the flow cavity, first passes through the spray layer and contacts the internal filtrate to form preliminary demisting, and then the exhaust gas flows upward from the top of the spray layer and contacts the conical bottom surface of the supporting cone rod, thereby receiving the low temperature of the filtrate in the storage tank to form condensation, and then flows upward from multiple spray holes to the temporary storage cavity, fully contacts the filtrate, forming a cooling and demisting effect, and finally passes through multiple activated carbon layers to reduce the smoke and water vapor content, and is discharged to the outside through the export chimney.

[0026] In summary, the present invention includes at least one of the following beneficial technical effects: 1. Use a mixed buffer box to slow down the flow rate of the exhaust gas and improve the cooling effect of the exhaust gas receiving heat exchanger. Then, the split buffer box separates and circulates the exhaust gas from different production lines and transports it to the inside of the spray packing tower. It is sprayed by multiple spray layers, so that the exhaust gas is fully sprayed with the filtrate, thereby reducing the overall temperature of the exhaust gas and preventing the generation of mist. Finally, the filtered gas is contacted with the activated carbon layer for filtration, keeping the exhaust gas in the working temperature range of the activated carbon layer, thereby improving the working efficiency of the activated carbon layer and reducing the risk of pollutants; 2. The conveying flow rate of the filtrate is compressed by means of the shrinking nozzle, so that the filtrate impacts the guide arc block during the conveying process, thereby driving the inner shell to rotate. The rotation of the inner shell increases the range of the filtrate sprayed from the spray hole. The rotation of the inner shell increases the contact time between the exhaust gas and the filtrate in the temporary storage chamber, improves the filtering effect, and as the filtrate is sprayed from the spray hole, the liquid storage tank is filled, so that when the exhaust gas contacts the supporting cone rod, it first receives the low temperature conducted by the filtrate to form a condensation effect, effectively reducing the mist content in the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional schematic diagram of the present invention; Figure 2 It is a three-dimensional exploded view of the present invention; Figure 3 A top view of the present invention; Figure 4 This is the internal structure diagram of the spray packing tower of the present invention; Figure 5 This is a diagram of the installation of a disassembly plate of a spray packing tower according to the present invention; Figure 6 This is a connection diagram of the outer ring body of the spray packing tower of the present invention; Figure 7 This is an exploded view of the interior of the spray packing tower of the present invention; Figure 8 It is a cross-sectional view of the outer ring body and inner shell structure of the present invention.

[0028] Reference numerals: 1, furnace chimney; 2, electric damper; 3, mixing buffer box; 4, heat exchanger; 5, induced draft fan; 6, diversion buffer box; 7, spray packing tower; 8, outlet chimney; 9, outlet pipe; 10. Circulation mechanism; 11. Inlet pipe; 12. On-off valve; 13. Wastewater discharge pipe; 14. Flow chamber; 15. Activated carbon layer; 16. Spray layer; 17. Disassembly plate; 18. Outer ring body; 19. Ring groove; 20. Auxiliary port 1; 21. Inner shell; 22. Ring block; 23. Inclined surface; 24. Guide arc block; 25. Temporary storage chamber; 26. Spray hole; 27. Auxiliary port 2; 28. Support cone rod; 29. ​​Liquid storage tank; 30. Filling layer; 31. Slot; 32. Shrink nozzle. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-Figure 8 The present invention is described in further detail.

[0030] The embodiment of the present invention discloses a baking line waste gas treatment system and method. Embodiment 1,

[0031] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , a baking line waste gas treatment system, including a plurality of furnace section chimneys 1 arranged on the north and south sides, the bottoms of the furnace section chimneys 1 are connected to the scheduling pipelines of the drying assembly line, so as to receive the discharged high-temperature waste gas, the two furnace section chimneys 1 are connected to the opposite sides thereof through pipelines and are provided with a mixing buffer box 3, and the middle parts of the pipelines of the two furnace section chimneys 1 are provided with an electric regulating damper 2, the opening of the electric regulating damper 2 is adapted to the furnace operation load, and the electric regulating damper 2 is connected to an external microcomputer or other control device through a circuit, the mixing buffer box 3 is provided with output ports at both ends of the side surface away from the electric regulating damper 2, and corresponds to the two furnace section chimneys 1, and a heat exchanger 4 is connected to the two output ports of the mixing buffer box 3 through pipelines, a low-temperature liquid for cooling is arranged inside the heat exchanger 4, an induced draft fan 5 is fixedly provided on the top of the heat exchanger 4, and the access end of the induced draft fan 5 is butt-jointed with the output end of the heat exchanger 4; The output ends of the two induced draft fans 5 are both connected to the diversion buffer box 6. The two diversion buffer boxes 6 are connected to a spray packing tower 7 at one end away from the induced draft fans 5 through a pipeline. A flow cavity 14 is provided inside the spray packing tower 7. The flow cavity 14 passes through the upper and lower ends of the spray packing tower 7 and is connected to the outside. An outlet chimney 8 is provided at the top through-hole of the spray packing tower 7. The outlet chimney 8 is set to a height of 35m and has a larger diffusion space. A plurality of activated carbon layers 15 (the number of activated carbon layers 15 is at least two) are inserted on the top of the inner wall of the flow cavity 14. The inside of the activated carbon layer 15 is configured to be filled with hydrophobic activated carbon. A plurality of spray layers 16 (the number of spray layers 16 is at least two) are provided on the inner wall of the flow cavity 14 at the bottom of the activated carbon layer 15. Nozzles are provided on the surfaces of the two spray layers 16, and the nozzles are conical to increase the flow rate of the filtrate.

[0032] It should be noted that the top of the furnace section chimney 1 is connected to the outside and is used for temporary exhaust gas discharge when the exhaust gas treatment device fails. A degassing pipe 9 is sealed and connected to the through-hole at the bottom of the spray packing tower 7. The degassing pipe 9 is sealed and connected to an inlet pipe 11 at one end away from the spray packing tower 7. One end of the inlet pipe 11 passes through the spray packing tower 7 and is located in the circulation cavity 14. The other end of the inlet pipe 11 is sealed and connected to a wastewater discharge pipe 13. The wastewater discharge pipe 13 is connected to an external wastewater treatment mechanism, and an opening and closing valve 12 is fixedly provided in the middle of the inlet pipe 11 and the wastewater discharge pipe 13. The opening and closing operating system of the opening and closing valve 12 is connected to an external microcomputer circuit. At the same time, a circulation mechanism 10 is fixedly provided in the middle of the degassing pipe 9. The circulation mechanism 10 is connected to an external power supply mechanism and a filtrate supply mechanism, so as to maintain the input of filtered water. A filling layer 30 is fixedly provided between the two spray layers 16. The filling layer 30 is made of polypropylene material and has good corrosion resistance and hydrophilicity.

[0033] Among them, the device also includes an electric adjustable damper 2, a mixing buffer box 3, a heat exchanger 4, an induced draft fan 5, a diversion buffer box 6, a circulation mechanism 10 and an opening and closing valve 12, which are all existing technologies, and their structural principles are no longer repeated. Embodiment 2,

[0034] Reference Figure 5 , Figure 6 , Figure 7 , Figure 8 , the difference between this embodiment and embodiment 1 is that it includes an outer ring body 18 movably arranged between the activated carbon layer 15 and the spray layer 16, the outer surface of the spray packing tower 7 is located at the outer ring body 18 and the two activated carbon layers 15, and the positions are connected to the flow cavity 14 and penetrated with a slot 31, and the outer surfaces of the outer ring body 18 and the two activated carbon layers 15 are fixed with a disassembly plate 17, and the outer surface of the disassembly plate 17 is movably inserted in the slot 31, so that the outer ring body 18 and the two activated carbon layers 15 are longitudinally fixed in the spray packing tower 7, the outer ring body 18 is annular as a whole, and the inner wall of the outer ring body 18 is inwardly provided with an annular groove 19, and the outer ring body 18 is located at the upper and lower ends of the annular groove 19 and penetrated with a plurality of auxiliary ports 20, and at the same time, the inner wall of the outer ring body 18 is rotatably provided with an inner shell 21; The outer surface of the inner shell 21 is provided with a protruding ring block 22 at the position of the ring groove 19. The ring block 22 is adapted to the size of the ring groove 19, so that the ring block 22 can be laterally rotated in the ring groove 19. The upper end surface of the inner shell 21 is provided with an inclined surface 23. The angle of the inclined surface 23 is set between 45 and 60 degrees, and a plurality of arc-shaped guide arc blocks 24 are fixed around the surface of the inclined surface 23. The inner shell 21 is provided with a temporary storage cavity 25 inwardly at the center bottom of the inclined surface 23. The temporary storage cavity 25 is tapered as a whole and The inclined surface formed by the cone of the temporary storage chamber 25 is at the same angle as the inclined surface 23 and in the opposite direction. A plurality of spray holes 26 are provided at the bottom of the temporary storage chamber 25 through the lower end surface of the inner shell 21. The plurality of spray holes 26 are tapered as a whole, and the bottom width of the spray holes 26 is relatively large. The portion of the inlet pipe 11 located in the flow chamber 14 is inwardly contracted to form a contracting nozzle 32, and the contracting nozzle 32 is located above one side of the guide arc block 24 as a whole, and the nozzle end of the contracting nozzle 32 is aligned with the arc surface of the guide arc block 24.

[0035] It should be noted that auxiliary ports 27 are provided through the upper end surface of the ring block 22 at the positions of the multiple auxiliary ports 1 20, and the auxiliary ports 1 20 are consistent in width and are filled with polyurethane sponge material inside, which has good mist filtering and corrosion resistance. At the same time, a supporting cone rod 28 is fixedly provided at the bottom of the spray hole 26 in the flow cavity 14, and the top of the supporting cone rod 28 is arranged in an inverted cone shape, and the supporting cone rod 28 is arranged in a rod shape at the bottom of the inverted cone, and the rod shape is inserted through the two spray layers 16 and the filling layer 30 and is fixedly connected to the bottom opening of the spray filling tower 7, and a cross-shaped bracket is fixed at the fixed connection to improve stability, and a liquid storage tank 29 is provided inwardly at the inverted cone top of the supporting cone rod 28, and the liquid storage tank 29 intercepts the spray hole 26 located in the middle part.

[0036] The implementation principle of Example 2 is as follows: the gas exported from the diversion buffer box 6 is input into the spray packing tower 7, so that it is located at the bottom of the circulation chamber 14. At this time, the personnel extract the external filtrate through the microcomputer control circulation mechanism 10, and transport it to the circulation chamber 14 through the introduction pipe 11. During the transportation process, the filtrate receives the thrust applied by the circulation mechanism 10 and the shrinking nozzle 32 to reduce the output end, thereby increasing the spraying speed of the filtrate. The filtrate sprayed by the shrinking nozzle 32 impacts the arc surface of the guide arc block 24, so that the thrust is received by the guide arc block 24, driving the inner shell 21 located on the inner surface of the outer ring body 18 to rotate. During the rotation process, when multiple auxiliary ports 27 overlap with auxiliary ports 1 20, the through port is connected, and part of the gas on the top of the spray layer 16 contacts with the sponge inside the auxiliary ports 27 and 1 20 and is discharged, thereby forming an auxiliary filtering effect; The filtrate flows into the temporary storage chamber 25 from the inclined surface 23, and is sprayed downward to the top of the spray layer 16 through a plurality of spray holes 26. During the spraying process, the filtrate passes through the reduced displacement of the shrinkage hole at the top of the spray hole 26, and then passes through the expansion hole at the bottom of the spray hole 26, so that the range of the filtrate injection is increased. At the same time, with the overall rotation of the inner shell 21, the filtrate is distributed twice to increase the injection range. The filtrate located in the central part first contacts with the support cone rod 28, and is filled into the liquid storage tank 29. When the liquid storage tank 29 is filled, it flows downward from the conical part at the top of the support cone rod 28. The remaining filtrate is sprayed downward into the spray layer 16 and contacts with the high-temperature exhaust gas to form a cooling effect. The high-temperature exhaust gas flowing upward from the spray layer 16 first contacts with the conical lower surface of the support cone rod 28, thereby receiving the temperature conducted by the filtrate in the liquid storage tank 29 to form a condensation phenomenon, thereby reducing the mist coefficient in the exhaust gas. The liquid generated by the condensation flows downward along the rod of the support cone rod 28 to the outlet pipe 9; When the high-temperature exhaust gas contacts the cone of the supporting cone rod 28, it is guided by the conical surface and flows out obliquely upward. Part of it is discharged through the opening formed by the auxiliary port 1 20 and the auxiliary port 2 27, and the rest is mixed with the filtrate again through the spray hole 26 and discharged upward from the inclined surface 23. Embodiment 3,

[0037] Reference Figures 1 to 8 , a method comprising the following steps: S01. The high-temperature exhaust gas discharged from the north-south drying lines is transported to the inner furnace section chimney 1 through a pipeline, and then discharged from the output end of the furnace section chimney 1, and the exhaust gas from the north and south lines is uniformly transported to the mixing buffer box 3 through multiple pipelines, so as to adjust the flow of the exhaust gas and reduce the flow rate. During the transportation process of the furnace section chimney 1, a microcomputer controls multiple electric regulating dampers 2 to open and close the pipeline, thereby forming an automatic regulation of the flow transportation to avoid the positive pressure fire extinguishing phenomenon caused by pressure imbalance, and then the two sides of the mixing buffer box 3 are provided with output ends corresponding to the north and south lines, and multiple pipelines are connected at the output end to divert the internal exhaust gas, and at the same time, multiple corresponding heat exchangers 4 are connected. The exhaust gas enters the heat exchanger 4 and contacts with the filtrate for preliminary cooling, and then is drawn into the diversion buffer box 6 by the induced draft fan 5 to slow down the flow again, and finally is transported by the diversion buffer box 6 to the spray packing tower 7 for the defog process.

[0038] S02. The circulation mechanism 10 is connected to the external water supply mechanism, so that the filtrate is drawn in and transported to the inside of the circulation cavity 14 through the introduction pipe 11. During the input process, it is compressed by the contraction nozzle 32 to increase the flow velocity impact force. As the filtrate is input, it impacts the guide arc block 24 to form a thrust, causing the inner shell 21 to rotate, and the filtrate flows into the temporary storage cavity 25 from the inclined surface 23, and is sprayed downward from multiple spray holes 26. The rotation of the inner shell 21 is coordinated to diffuse the sprayed filtrate to increase the coverage range. The filtrate within the range of the liquid storage tank 29 fills the liquid storage tank 29. When the liquid storage tank 29 is filled, it overflows along the top surface of the supporting cone rod 28 and flows downward. The remaining filtrate is sprayed downward and transported to the spray layer 16.

[0039] S03. The exhaust gas entering the diversion buffer box 6 is transported to the spray packing tower 7, and flows upward as a whole at the bottom position of the flow cavity 14. First, the exhaust gas passes through the spray layer 16 and contacts the filtrate in the internal holes to form a preliminary demisting. Then the exhaust gas flows upward from the top of the spray layer 16 and contacts the conical bottom surface of the supporting cone rod 28, thereby receiving the low temperature of the filtrate in the liquid storage tank 29 to form condensation, generating water droplets attached to the conical bottom surface of the supporting cone rod 28, and flowing downward along the rod of the supporting cone rod 28 and discharged into the outlet pipe 9. Then the condensed exhaust gas flows upward from multiple spray holes 26 to the temporary storage cavity 25, fully contacts with the filtrate, forming a cooling and demisting effect, and finally passes through multiple activated carbon layers 15 to reduce the smoke and water vapor content, and is discharged to the outside through the outlet chimney 8.

[0040] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A baking line waste gas treatment system, characterized by: The invention comprises a plurality of furnace section chimneys (1) for outputting exhaust gas, one end of each of the plurality of furnace section chimneys (1) is connected to a mixing buffer box (3) through a pipeline, a plurality of electric dampers (2) are arranged between the pipelines of each of the plurality of furnace section chimneys (1) and the mixing buffer box (3), a plurality of heat exchangers (4) are arranged at both sides of the mixing buffer box (3), a plurality of induced draft fans (5) for transmitting gas are arranged at the top of each of the plurality of heat exchangers (4), a plurality of induced draft fans (5) are arranged at one end away from the heat exchanger (4) with a shunt buffer box (6), and a plurality of shunt buffer boxes (6) are arranged at one end away from the induced draft fan (5) with a spray packing tower (7) for cooling and filtering gas; A circulation chamber (14) is provided in the middle of the spray packing tower (7), a plurality of activated carbon layers (15) for filtering exhaust gas are provided at the top of the circulation chamber (14), a plurality of spray layers (16) for cooling exhaust gas are provided on the other side of the activated carbon layer (15) in the circulation chamber (14), a filling layer (30) is provided between the plurality of spray layers (16), a discharge pipe (9) is provided at the bottom of the circulation chamber (14) and passes through the spray packing tower (7) and is connected thereto, an inlet pipe (11) connected to the inside of the spray packing tower (7) is provided at the top of the inlet pipe (9), a wastewater discharge pipe (13) connected to the outside is provided at one end of the inlet pipe (11) away from the spray packing tower (7), and an openable and closable on-off valve (12) is provided in the middle of the inlet pipe (11) and the wastewater discharge pipe (13).

2. A baking line waste gas treatment system according to claim 1, characterized in that: An annular outer ring body (18) is inserted and arranged on the inner wall of the circulation cavity (14) between the activated carbon layer (15) and the spray layer (16), an annular groove (19) is provided in the middle of the inner wall of the outer ring body (18), and a plurality of auxiliary openings (20) are provided through the upper and lower ends of the annular groove (19).

3. A baking line waste gas treatment system according to claim 2, characterized in that: An inner shell (21) is rotatably provided on the inner wall of the outer ring body (18); a ring block (22) is protrudingly provided on the outer surface of the inner shell (21) at the position of the ring groove (19); the ring block (22) is movably abutted against the groove of the ring groove (19); and auxiliary openings (27) are provided on the surface of the ring block (22) at the positions of the plurality of auxiliary openings (20).

4. A baking line waste gas treatment system according to claim 3, characterized in that: The top of the inner shell (21) is provided with an inclined surface (23) facing inwards, and a plurality of guide arc blocks (24) are arranged around the surface of the inclined surface (23). The portion of the inlet pipe (11) connected to the spray packing tower (7) is provided with a shrinking nozzle (32) for increasing water pressure, and the shrinking nozzle (32) is located obliquely above the guide arc block (24) to increase the impact force.

5. A baking line waste gas treatment system according to claim 4, characterized in that: Slots (31) communicating with the outside are provided at positions of the plurality of activated carbon layers (15) and the outer ring body (18) in the circulation cavity (14), and disassembly plates (17) are movably inserted into the plurality of slots (31). The plurality of disassembly plates (17) are sequentially fixedly connected to the outer surfaces of the plurality of activated carbon layers (15) and the outer ring body (18) in a surrounding manner.

6. A baking line waste gas treatment system according to claim 5, characterized in that: The inner shell (21) is provided with a temporary storage chamber (25) at the bottom of the inclined surface (23) and is provided with a plurality of conical spray holes (26) at the bottom of the temporary storage chamber (25) and penetrating through the inner shell (21).

7. A baking line waste gas treatment system according to claim 6, characterized in that: A supporting cone rod (28) is fixedly provided at the bottom of the spray filling tower (7), the top of the supporting cone rod (28) is inserted through the spray layer (16) and the filling layer (30) and is arranged in a cone shape, and a liquid storage groove (29) is opened downward from the top of the cone, and the liquid storage groove (29) is aligned with the center of the inner shell (21).

8. The baking line exhaust gas treatment system according to claim 1, characterized in that: A circulation mechanism (10) for providing suction force is arranged in the middle of the outlet pipe (9), and an access end of the circulation mechanism (10) is connected to an external power supply mechanism circuit.

9. A baking line waste gas treatment system according to claim 1, characterized in that: The top of the circulation cavity (14) penetrates through the spray packing tower (7) to form a through opening, and a discharge chimney (8) is fixedly provided on the surface of the through opening of the spray packing tower (7).

10. A method, characterized in that: A baking line exhaust gas treatment system comprising claims 1 to 9, comprising the following steps: S01, the high-temperature exhaust gas discharged from the drying lines of the north and south lines is discharged from the output end of the furnace section chimney (1), and is transported to the mixing buffer box (3) through multiple pipes for flow adjustment. During the transportation process of the furnace section chimney (1), the flow delivery is automatically regulated by the electric regulating dampers (2) in the middle of the multiple pipes to form an opening and closing, thereby avoiding the phenomenon of positive pressure fire extinguishing caused by pressure imbalance. Then, the output end of the mixing buffer box (3) is connected to multiple pipes to divert the internal exhaust gas, and the multiple heat exchangers (4) are connected accordingly. The exhaust gas enters the heat exchanger (4) for cooling, and is then drawn into the diversion buffer box (6) by the induced draft fan (5) to form a secondary slow flow. Finally, the exhaust gas is transported from the diversion buffer box (6) to the spray packing tower (7) for purification and demisting. S02, the circulation mechanism (10) introduces external filtrate and transports it to the inside of the circulation chamber (14) through the introduction pipe (11). As the filtrate is input, it flows into the temporary storage chamber (25) from the inclined surface (23) and is sprayed downward from the plurality of spray holes (26). The filtrate within the range of the liquid storage tank (29) fills the liquid storage tank (29). When the liquid storage tank (29) is filled, it overflows along the top surface of the supporting cone rod (28) and flows downward. The remaining filtrate is sprayed downward and transported to the spray layer (16); S03. The waste gas entering the diversion buffer box (6) flows upward in the flow chamber (14), first passes through the spray layer (16) and contacts the filtrate inside to form a preliminary demisting effect, and then the waste gas flows upward from the top of the spray layer (16) and contacts the conical bottom surface of the supporting cone rod (28), thereby receiving the low temperature of the filtrate in the liquid storage tank (29) to form condensation, and then flows upward from the multiple spray holes (26) to the temporary storage chamber (25), fully contacts the filtrate, forming a cooling and demisting effect, and finally passes through multiple activated carbon layers (15) to reduce the smoke and water vapor content, and is discharged to the outside through the outlet chimney (8).

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