Efficient cyclone aeration energy-saving treatment system for pulping and papermaking wastewater

Abstract

The invention discloses an efficient cyclone aeration energy-saving treatment system for pulping and papermaking wastewater. The efficient cyclone aeration energy-saving treatment system comprises an aeration tank, array aerators, an oxidation decoloration tank, a first anti-corrosion air supply manifold, a high-pressure air supply nozzle and an activated carbon filter layer, a tank cavity is formed in the aeration tank, array aerators are uniformly arranged on the inner surface of the bottom in the tank cavity, and a discharge port is formed in the inner wall of one side of the upper end of the tank cavity; modular design is adopted, deep purification and stable operation of pulping and papermaking wastewater are achieved through system overall structure optimization and core assembly collaborative design, aerators arranged in the aeration tank in an array mode can form a spiral ascending flow state and a bottom negative pressure entrainment effect on the basis of the fluid dynamics principle, and the aeration effect is improved. The particle size of bubbles is effectively refined, the gas-liquid contact time is prolonged, the oxygen transfer efficiency is greatly improved, and the uniform distribution of dissolved oxygen in the tank can be ensured through the distributed layout of multiple groups of anti-corrosion gas supply manifolds and high-pressure gas supply nozzles in the oxidation decoloration tank.

Description

Technical Field

[0001] This invention relates to the field of energy-saving treatment technology, and in particular to a high-efficiency cyclone aeration energy-saving treatment system for pulp and paper wastewater. Background Technology

[0002] As a crucial raw material industry for the national economy, the pulp and paper industry generates a large amount of highly polluting wastewater during its production process. This wastewater is characterized by high suspended solids content, poor biodegradability, deep color, high organic matter concentration, and complex composition. However, existing aeration systems for pulp and paper wastewater treatment still face numerous technical bottlenecks. First, traditional aeration equipment has inherent limitations. Microporous aerators are prone to clogging in high suspended solids wastewater environments, and after long-term operation, the bubble dispersion effect deteriorates, oxygen transfer efficiency decreases significantly, and there is a lack of effective stirring function, which easily leads to sludge deposition at the bottom of the tank. Although jet aerators have relatively better anti-clogging properties, they require additional high-pressure circulating water pumps, resulting in high energy costs. Furthermore, the nozzles are prone to scaling, affecting the gas-liquid mixing effect. Second, the existing treatment systems lack synergistic design. The aeration unit and the oxidation and decolorization unit lack linkage and coordination. The unreasonable layout of the air supply structure leads to uneven distribution of dissolved oxygen in the tank. The filter layer in the oxidation and decolorization stage is easily clogged by suspended solids, and the activated sludge does not have sufficient contact with the gas and liquid, resulting in low pollutant degradation efficiency and large fluctuations in treatment effect. Summary of the Invention

[0003] The purpose of this invention is to provide a high-efficiency cyclone aeration energy-saving treatment system for pulp and paper wastewater, so as to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a high-efficiency cyclone aeration energy-saving treatment system for pulp and paper wastewater, including an aeration tank, wherein a tank cavity is opened in the aeration tank, and an array of aerators is evenly arranged on the bottom inner surface of the tank cavity. A discharge port is opened on the inner wall of one side of the upper end of the tank cavity, and a connecting flange is fixedly connected to the end of the discharge port, and the connecting flange is arranged on the outer wall of one side of the aeration tank.

[0005] As a further technical solution of the present invention, a transmission pipe is provided at the end of the discharge port, an oxidation decolorization tank is provided at the end of the transmission pipe, and a first one-way valve is provided between the discharge port and the transmission pipe.

[0006] As a further technical solution of the present invention, an inlet is provided on one side of the outer wall of the oxidation decolorization tank corresponding to the end of the transmission pipe, and a second one-way valve is provided between the inlet and the transmission pipe.

[0007] As a further technical solution of the present invention, the oxidation decolorization tank is provided with an inner cavity, and an anti-clogging filter and an activated carbon filter layer are provided in the inner cavity, with the anti-clogging filter being located below the activated carbon filter layer.

[0008] As a further technical solution of the present invention, an activated sludge chamber is provided between the anti-clogging filter screen and the activated carbon filter layer, and a first anti-corrosion air supply manifold, a second anti-corrosion air supply manifold, a third anti-corrosion air supply manifold and a fourth anti-corrosion air supply manifold are provided on the bottom inner surface of the inner chamber.

[0009] As a further technical solution of the present invention, the anti-clogging filter screen is disposed above the first anti-corrosion air supply manifold, the second anti-corrosion air supply manifold, the third anti-corrosion air supply manifold and the fourth anti-corrosion air supply manifold, and high-pressure air supply nozzles are uniformly disposed on the first anti-corrosion air supply manifold, the second anti-corrosion air supply manifold, the third anti-corrosion air supply manifold and the fourth anti-corrosion air supply manifold.

[0010] As a further technical solution of the present invention, the input ends of the first anti-corrosion gas supply manifold, the second anti-corrosion gas supply manifold, the third anti-corrosion gas supply manifold and the fourth anti-corrosion gas supply manifold are all provided with connection ports, and connecting pipes are provided on the connection ports.

[0011] As a further technical solution of the present invention, an outlet is provided on the upper inner wall of the inner cavity, a conveying pipe is provided at the end of the outlet, and a sedimentation tower is provided at the end of the conveying pipe.

[0012] As a further technical solution of the present invention, a third one-way valve is provided between the conveying pipeline and the sedimentation tower.

[0013] As a further technical solution of the present invention, a connecting pipe is provided at the bottom of the sedimentation tower, a disinfection tank is provided at the end of the connecting pipe, and a fourth one-way valve is provided between the connecting pipe and the disinfection tank.

[0014] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: This invention adopts a modular design. Through overall system structure optimization and synergistic design of core components, the device achieves deep purification and stable operation of pulp and paper wastewater. The aerators arranged in an array in the aeration tank are based on fluid dynamics principles, which can form a spiral upward flow and a bottom negative pressure entrainment effect, effectively refining the bubble particle size and extending the gas-liquid contact time, significantly improving oxygen transfer efficiency. The distributed layout of multiple sets of corrosion-resistant air supply manifolds and high-pressure air supply nozzles in the oxidation and decolorization tank can ensure uniform distribution of dissolved oxygen in the tank, driving the activated sludge and wastewater to mix thoroughly, enhancing the degradation of recalcitrant organic matter and coloring substances. At the same time, it prevents clogging of the filter screen and activated sludge chamber. Together with the activated carbon filter layer, it forms a graded purification system that sequentially intercepts suspended solids, degrades pollutants, and adsorbs residual color and organic matter, ensuring stable effluent quality that meets standards. The system also has good resistance to water quality fluctuations and strong operational reliability. In terms of energy saving and carbon reduction, the device adopts a combination design of array aeration and multi-manifold precise air delivery, coupled with variable frequency drive and intelligent control mechanism, which can dynamically adjust the aeration volume according to wastewater treatment needs, avoid ineffective energy consumption, and significantly reduce system operating energy consumption, which is in line with the concept of green and low-carbon development. In terms of operation and maintenance and adaptability, the negative pressure suction structure of the aerator and the reverse purging effect of the high-pressure air nozzle can effectively avoid sludge deposition and component blockage, extend the maintenance cycle, and reduce operation and maintenance intensity and cost. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is an exploded view of the structure of the present invention; Figure 3 This is an exploded view of the right-side three-dimensional structure of the present invention; Figure 4 This is a top-view exploded view of the structure of the present invention.

[0017] In the diagram: 1. Aeration tank; 2. Tank cavity; 3. Array aerator; 4. Discharge port; 5. Connecting flange; 6. Transmission pipeline; 7. First check valve; 8. Oxidation and decolorization tank; 9. Inlet; 10. Second check valve; 11. Inner cavity; 12. Activated sludge cavity; 13. First anti-corrosion air supply manifold; 14. Second anti-corrosion air supply manifold; 15. Third anti-corrosion air supply manifold; 16. Fourth anti-corrosion air supply manifold; 17. High-pressure air nozzle; 18. Connection port; 19. Connecting pipeline; 20. Anti-clogging filter screen; 21. Activated carbon filter layer; 22. Discharge port; 23. Conveying pipeline; 24. Sedimentation tower; 25. Third check valve; 26. Connecting pipeline; 27. Disinfection tank; 28. Fourth check valve. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see the appendix Figure 1 - Appendix Figure 4This invention provides an embodiment of a high-efficiency cyclone aeration energy-saving treatment system for pulp and paper wastewater, comprising an aeration tank 1, a chamber 2 within the aeration tank 1, an array of aerators 3 evenly arranged on the bottom inner surface of the chamber 2, a discharge port 4 on the upper inner wall of the chamber 2, a connecting flange 5 fixedly connected to the end of the discharge port 4, and the connecting flange 5 being disposed on the outer wall of one side of the aeration tank 1; a transmission pipe 6 is disposed at the end of the discharge port 4, and an oxidation decolorization tank 8 is disposed at the end of the transmission pipe 6; a first one-way valve 7 is disposed between the discharge port 4 and the transmission pipe 6, the first one-way valve 7 being used to prevent wastewater in the transmission pipe 6 from flowing back to the aeration tank 1, ensuring unidirectional water flow; and an oxidation decolorization tank 8 is disposed on the outer wall of one side of the oxidation decolorization tank 8. A feed inlet 9 is provided at the end of the transmission pipe 6. A second one-way valve 10 is installed between the feed inlet 9 and the transmission pipe 6. The second one-way valve 10 is used to prevent wastewater in the oxidation decolorization tank 8 from flowing back into the transmission pipe 6, thus avoiding cross-contamination of wastewater from different treatment stages. An inner cavity 11 is provided inside the oxidation decolorization tank 8. An anti-clogging filter 20 and an activated carbon filter layer 21 are installed inside the inner cavity 11. The anti-clogging filter 20 is located below the activated carbon filter layer 21. The anti-clogging filter 20 is used to intercept large suspended particles, and the activated carbon filter layer 21 is used to adsorb residual color and organic matter, achieving graded purification. An activated sludge chamber 12 is provided between the anti-clogging filter 20 and the activated carbon filter layer 21, and a first anti-corrosion conveying device is provided on the bottom inner surface of the inner cavity 11. The system includes four sets of air manifolds: a first anti-corrosion air manifold 13, a second anti-corrosion air manifold 14, a third anti-corrosion air manifold 15, and a fourth anti-corrosion air manifold 16. The activated sludge chamber 12 provides space for microbial degradation. These four sets of anti-corrosion air manifolds ensure uniform air delivery. Anti-clogging filters 20 are positioned above the first, second, third, and fourth anti-corrosion air manifolds. High-pressure air nozzles 17 are evenly distributed on these manifolds. The anti-clogging filters 20 prevent suspended solids from clogging the air delivery components, and the high-pressure air nozzles 17 enhance the mixing of gas, liquid, and activated sludge. The first anti-corrosion air manifold 13... The input ends of the second anti-corrosion gas supply manifold 14, the third anti-corrosion gas supply manifold 15, and the fourth anti-corrosion gas supply manifold 16 are all provided with connection ports 18, and connecting pipes 19 are provided on the connection ports 18. The connection ports 18 and the connecting pipes 19 are used to achieve stable connection between the external gas source and the gas supply manifold. An outlet 22 is opened on the upper inner wall of the inner cavity 11. A conveying pipe 23 is provided at the end of the outlet 22. A sedimentation tower 24 is provided at the end of the conveying pipe 23. The outlet 22 and the conveying pipe 23 are used to transport the oxidized and decolorized wastewater to the sedimentation tower 24. A third check valve 25 is provided between the conveying pipe 23 and the sedimentation tower 24. The third check valve 25 is used to prevent the wastewater in the sedimentation tower 24 from flowing back to the conveying pipe 23.A connecting pipe 26 is installed at the bottom of the sedimentation tower 24, and a disinfection tank 27 is installed at the end of the connecting pipe 26. A fourth check valve 28 is installed between the connecting pipe 26 and the disinfection tank 27. The fourth check valve 28 is used to prevent wastewater in the disinfection tank 27 from flowing back to the connecting pipe 26.

[0020] Working Principle: Using this invention, pulp and paper wastewater first enters the chamber 2 of the aeration tank 1. The array of aerators 3, evenly arranged on the inner surface of the bottom of the chamber 2, starts simultaneously. Based on fluid dynamics principles, these aerators 3 create a spiral upward flow within the chamber through high-speed airflow injection, simultaneously forming a stable negative pressure entrainment effect at the bottom. This thoroughly mixes the activated sludge and wastewater at the bottom of the chamber 2. During the spiral upward process, the airflow is refined into microbubbles by the internal cutting structure, significantly extending the gas-liquid contact time and providing sufficient dissolved oxygen for the degradation of organic matter in the wastewater, achieving preliminary and efficient degradation of pollutants. The wastewater, after preliminary treatment in the aeration tank 1, is discharged through the outlet 4 on one side of the upper inner wall of the chamber 2. The outlet 4 is connected to... The flange 5 ensures a secure and sealed connection with the transmission pipeline 6. Wastewater is smoothly transported along the transmission pipeline 6, and the first one-way valve 7 precisely controls the flow direction to prevent backflow. Then, it enters the oxidation decolorization tank 8 through the inlet 9 on one side of the outer wall. The second one-way valve 10 between the inlet 9 and the transmission pipeline 6 further ensures unidirectional and orderly flow, preventing cross-contamination between wastewater from different treatment stages. After entering the inner cavity 11 of the oxidation decolorization tank 8, the wastewater first flows through the anti-clogging filter 20. The anti-clogging filter 20 effectively intercepts large suspended particles in the wastewater, preventing clogging of subsequent functional components from the source. The filtered wastewater smoothly enters the activated sludge chamber 12 between the anti-clogging filter 20 and the activated carbon filter layer 21. Simultaneously... An external air source stably supplies gas to each anti-corrosion air supply manifold through the connection port 18 of the connecting pipe 19 and the input ends of the first anti-corrosion air supply manifold 13, the second anti-corrosion air supply manifold 14, the third anti-corrosion air supply manifold 15, and the fourth anti-corrosion air supply manifold 16. The gas is ejected at high speed through high-pressure air nozzles 17 evenly arranged on each manifold, creating a violent stirring effect in the activated sludge chamber 12. This ensures that the activated sludge, wastewater, and dissolved oxygen come into full contact and mix, enhancing the deep degradation of recalcitrant organic matter and color-causing substances. The wastewater, after deep treatment in the activated sludge chamber 12, permeates upwards to the activated carbon filter layer 21. The activated carbon filter layer 21 efficiently adsorbs residual color, organic matter, and trace pollutants, achieving further purification and decolorization of the water. The purified wastewater... Water is discharged through the outlet 22 on the upper inner wall of the inner cavity 11 and precisely transported to the sedimentation tower 24 via the conveying pipe 23. The third one-way valve 25 between the conveying pipe 23 and the sedimentation tower 24 strictly controls the direction of water flow to prevent backflow of water in the sedimentation tower 24 from affecting the treatment effect. The wastewater undergoes full solid-liquid separation in the sedimentation tower 24, and suspended impurities slowly settle under gravity. The upper clarified liquid is transported to the disinfection tank 27 via the connecting pipe 26 at the bottom of the sedimentation tower 24. The fourth one-way valve 28 between the connecting pipe 26 and the disinfection tank 27 ensures continuous unidirectional flow of water. After the wastewater is sterilized in the disinfection tank 27, it finally meets the relevant requirements for the reuse or discharge of pulp and paper wastewater, realizing efficient purification and resource recycling of wastewater.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-efficiency cyclone aeration energy-saving treatment system for pulp and paper wastewater, comprising an aeration tank (1), characterized in that: The aeration tank (1) has a chamber (2) inside. An array of aerators (3) is evenly arranged on the bottom inner surface of the chamber (2). A discharge port (4) is opened on the inner wall of the upper side of the chamber (2). A connecting flange (5) is fixedly connected to the end of the discharge port (4), and the connecting flange (5) is located on the outer wall of one side of the aeration tank (1).

2. The high-efficiency cyclone aeration energy-saving treatment system for pulp and paper wastewater according to claim 1, characterized in that: The discharge port (4) is provided with a transmission pipe (6) at the end, and an oxidation decolorization tank (8) is provided at the end of the transmission pipe (6). A first one-way valve (7) is provided between the discharge port (4) and the transmission pipe (6).

3. The high-efficiency cyclone aeration energy-saving treatment system for pulp and paper wastewater according to claim 2, characterized in that: An inlet (9) is provided on one side of the outer wall of the oxidation decolorization tank (8) corresponding to the end of the transmission pipe (6), and a second one-way valve (10) is provided between the inlet (9) and the transmission pipe (6).

4. The high-efficiency cyclone aeration energy-saving treatment system for pulp and paper wastewater according to claim 3, characterized in that: The oxidation decolorization tank (8) has an inner cavity (11), and an anti-clogging filter (20) and an activated carbon filter layer (21) are provided in the inner cavity (11), with the anti-clogging filter (20) located below the activated carbon filter layer (21).

5. The high-efficiency cyclone aeration energy-saving treatment system for pulp and paper wastewater according to claim 4, characterized in that: An activated sludge chamber (12) is provided between the anti-clogging filter (20) and the activated carbon filter layer (21), and a first anti-corrosion air supply manifold (13), a second anti-corrosion air supply manifold (14), a third anti-corrosion air supply manifold (15) and a fourth anti-corrosion air supply manifold (16) are provided on the bottom inner surface of the inner chamber (11).

6. The high-efficiency cyclone aeration energy-saving treatment system for pulp and paper wastewater according to claim 5, characterized in that: The anti-clogging filter (20) is disposed above the first anti-corrosion air supply manifold (13), the second anti-corrosion air supply manifold (14), the third anti-corrosion air supply manifold (15) and the fourth anti-corrosion air supply manifold (16), and high-pressure air supply nozzles (17) are evenly disposed on the first anti-corrosion air supply manifold (13), the second anti-corrosion air supply manifold (14), the third anti-corrosion air supply manifold (15) and the fourth anti-corrosion air supply manifold (16).

7. The high-efficiency cyclone aeration energy-saving treatment system for pulp and paper wastewater according to claim 6, characterized in that: The first anti-corrosion gas supply manifold (13), the second anti-corrosion gas supply manifold (14), the third anti-corrosion gas supply manifold (15) and the fourth anti-corrosion gas supply manifold (16) are all provided with connection ports (18), and connecting pipes (19) are provided on the connection ports (18).

8. The high-efficiency cyclone aeration energy-saving treatment system for pulp and paper wastewater according to claim 4, characterized in that: The inner wall of the upper end of the inner cavity (11) is provided with an outlet (22), and a conveying pipe (23) is provided at the end of the outlet (22), and a sedimentation tower (24) is provided at the end of the conveying pipe (23).

9. The high-efficiency cyclone aeration energy-saving treatment system for pulp and paper wastewater according to claim 8, characterized in that: A third check valve (25) is provided between the conveying pipeline (23) and the sedimentation tower (24).

10. The high-efficiency cyclone aeration energy-saving treatment system for pulp and paper wastewater according to claim 9, characterized in that: The bottom of the sedimentation tower (24) is provided with a connecting pipe (26), and the end of the connecting pipe (26) is provided with a disinfection tank (27). A fourth one-way valve (28) is provided between the connecting pipe (26) and the disinfection tank (27).

Images