Casting waste gas spray water delay oxidation regeneration system

Abstract

This invention relates to a delayed oxidation regeneration system for casting waste gas spray water. The system includes a water flow guiding subsystem, a hydraulic drive subsystem located within the water flow guiding subsystem, a power transmission subsystem connected to the hydraulic drive subsystem, a pressurization subsystem connected to the power transmission subsystem, and a gas supply subsystem for providing ozone gas to the pressurization subsystem. This invention uses the gravitational potential energy of the spray wastewater itself as the system's driving force, converting it into pressurization energy for the ozone-water mixture through mechanical design. This completely eliminates the need for external motors, compressors, or high-pressure pumps required by traditional pressurization methods, achieving significant energy savings and reducing system operating costs and deployment complexity.

Description

Technical Field

[0001] This invention belongs to the field of industrial wastewater treatment technology, specifically relating to a delayed oxidation and regeneration system for casting exhaust gas spray water. Background Technology

[0002] In the foundry industry, spray towers used to treat waste gases containing volatile organic compounds generate large amounts of spray wastewater. This type of wastewater has a complex composition and poor biodegradability, and usually requires treatment using advanced oxidation technologies. Among these, ozone oxidation has attracted much attention due to its strong oxidizing properties.

[0003] To address the issue of wastewater regeneration, delayed oxidation technology is widely used as an advanced treatment method. The core of this technology lies in adding a strong oxidant (such as ozone or hydrogen peroxide) to the wastewater and providing a sufficiently long hydraulic retention time to ensure that recalcitrant organic matter is fully and thoroughly oxidized and decomposed into smaller inorganic molecules, thereby restoring water quality and enabling the recycling of wastewater. Ozone, due to its strong oxidizing power and the absence of secondary sludge, has become a favored oxidant in delayed oxidation processes.

[0004] Improving the solubility of ozone in treated water is key to enhancing oxidation efficiency and reducing operating costs, and increasing the partial pressure of ozone in the gas phase can effectively improve its solubility in water. Currently, industrial applications typically use external power (such as motor-driven compressors or high-pressure pumps) to pressurize ozone-water contact systems (such as contact towers and reaction tanks). While effective, this method suffers from drawbacks such as high equipment investment, high energy consumption, and system complexity. Especially for widely distributed spray tower systems, the additional power supply increases deployment costs and maintenance difficulties.

[0005] Therefore, there is an urgent need to develop an energy-saving and efficient ozone pressurization and dissolution device and method that can utilize the system's own conditions. Summary of the Invention

[0006] The purpose of this invention is to provide a delayed oxidation regeneration system for casting waste gas spray water in order to solve the problems mentioned in the background art.

[0007] The present invention achieves the above objectives through the following technical solutions: The casting waste gas spray water delayed oxidation regeneration system includes a water flow guiding subsystem, a hydraulic drive subsystem located within the water flow guiding subsystem, a power transmission subsystem connected to the hydraulic drive subsystem, a pressurization subsystem connected to the power transmission subsystem, and a gas supply subsystem for providing ozone gas to the pressurization subsystem. The downstream height of the water flow guiding subsystem is lower than its upstream height. The water flow guiding subsystem is used to introduce the spray wastewater to the hydraulic drive subsystem to drive the hydraulic drive subsystem to operate. This allows the hydraulic drive subsystem to drive the pressurization subsystem through the power transmission subsystem to pressurize the mixture of ozone and spray wastewater, thereby increasing the amount of ozone dissolved in the spray wastewater.

[0008] Preferably, the water flow guiding subsystem includes a continuously folded Z-shaped diversion plate, and two parallel baffles for accumulating water flow are fixedly provided on the diversion plate; The hydraulic drive subsystem includes a transmission belt rotatably mounted between two baffles, several rollers rotatably disposed within the transmission belt for supporting the transmission belt, and several water tanks fixed on the outer ring of the transmission belt for storing water. The length direction of the transmission belt is the same as that of the middle section of the diversion plate, and there is a gap between the transmission belt and the middle section. The rollers are mounted on two baffles via a rotating shaft.

[0009] Preferably, the power transmission subsystem includes two driving gears fixedly disposed at both ends of the rotating shaft, driven gears rotatably mounted on two baffles and meshing with the two driving gears respectively, a turntable coaxial with the driven gears, and a crank eccentrically mounted on the turntable; The pressurization subsystem includes a water tank with an inlet and an outlet and an open top, which is fixed on the diversion plate, and a piston that is rotatably connected to the crank and located inside the water tank. The piston is used to pressurize the mixture of ozone and spray wastewater in the water tank. Both the inlet and outlet are equipped with solenoid valves for controlling the inflow and outflow of spray wastewater.

[0010] Preferably, the diameter of the driving gear is greater than the diameter of the driven gear.

[0011] Preferably, the bottom of the water tank is provided with several air inlets, and the air supply subsystem includes an air pipe fixed in the air inlet and an air supply component connected to the air pipe.

[0012] Preferably, a buffer module for protecting the piston is also provided between the crank and the piston; The buffer module includes a pressure block rotatably mounted on two cranks, several first telescopic components fixedly mounted on the bottom of the pressure block, and several elastic components wound around the first telescopic components. The end of the first telescopic component away from the pressure block is fixedly installed on the piston.

[0013] Preferably, the piston is fixedly provided with a second telescopic component on the bottom wall inside the water tank, and a first motor is fixedly provided at the free end of the second telescopic component. The output shaft end of the first motor is fixedly provided with a wheel for raising the spray wastewater in the water tank.

[0014] Preferably, the first motor is equipped with a floating block for controlling the height of the wheel.

[0015] Preferably, a second motor is fixedly mounted on the bottom wall of the piston inside the water tank, and a number of blades for cutting the sprayed wastewater raised by the rotating wheel are fixedly mounted on the output shaft end of the second motor.

[0016] Preferably, the piston is fixedly provided with a No. 3 telescopic component on the bottom wall inside the water tank, and a No. 4 telescopic component communicating with the No. 3 telescopic component is fixedly provided at the bottom of the water tank, and a push plate is fixedly provided at the telescopic end of the No. 4 telescopic component. The No. 3 telescopic component is equipped with a return spring inside for retracting the No. 3 telescopic component.

[0017] The beneficial effects of this invention are as follows: 1. This invention uses the gravitational potential energy of the sprayed wastewater as the driving force of the system, and converts it into pressurization energy for the ozone-water mixture through mechanical design. This completely eliminates the need for external motors, compressors or high-pressure pumps required by traditional pressurization methods, achieving significant energy-saving effects and reducing system operating costs and deployment complexity.

[0018] 2. The ozone-rich water produced by this invention slowly releases microbubbles under normal pressure, which prolongs the effective reaction time between ozone and pollutants, allowing for more thorough oxidation and decomposition of recalcitrant organic matter and improving the regeneration quality of the spray water.

[0019] 3. This invention integrates multiple mechanical mixing units such as water pumping, cutting, and scraping, which effectively overcomes the problem of uneven gas-liquid distribution in static pressurization containers, ensures full contact between ozone and wastewater, and improves the overall efficiency of pressurization and dissolution.

[0020] 4. The buffer module design in this invention solves the problem of damage to rigid transmission systems caused by the incompressibility of liquids, and improves the reliability and service life of the entire mechanical transmission chain. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 This is a schematic diagram illustrating the working principle of the present invention; Figure 4 This is a schematic diagram showing the positional relationship between the piston and the water tank in this invention.

[0022] In the diagram: 1. Diversion plate; 2. Baffle; 3. Transmission belt; 4. Roller; 5. Water tank; 6. Gap; 7. Drive gear; 8. Driven gear; 9. Turntable; 10. Crank; 11. Inlet; 12. Outlet; 13. Water tank; 14. Piston; 15. Air inlet; 16. Pressure block; 17. Telescopic component No. 1; 18. Elastic component; 19. Telescopic component No. 2; 20. Motor No. 1; 21. Rotary wheel; 22. Floating block; 23. Motor No. 2; 24. Blade; 25. Telescopic component No. 3; 26. Telescopic component No. 4; 27. Push plate; 28. Second section; 29. ​​First section; 30. Third section. Detailed Implementation

[0023] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content. Example 1

[0024] like Figure 1-4 As shown, the casting waste gas spray water delayed oxidation regeneration system includes a water flow guiding subsystem, a hydraulic drive subsystem located within the water flow guiding subsystem, a power transmission subsystem connected to the hydraulic drive subsystem, a pressurization subsystem connected to the power transmission subsystem, and a gas supply subsystem for supplying ozone gas to the pressurization subsystem.

[0025] The downstream height of the water flow guidance subsystem is lower than its upstream height. The water flow guidance subsystem is used to introduce the spray wastewater to the hydraulic drive subsystem to drive the hydraulic drive subsystem to operate. This allows the hydraulic drive subsystem to drive the pressurization subsystem through the power transmission subsystem to pressurize the mixture of ozone and spray wastewater, thereby increasing the amount of ozone dissolved in the spray wastewater.

[0026] Preferably, the water flow guiding subsystem in this embodiment includes a continuously folded Z-shaped diversion plate 1. The diversion plate 1 includes a continuous first segment 29, a second segment 28, and a third segment 30. The first segment 29 and the third segment 30 are horizontally arranged, while the second segment 28 is inclined or vertically arranged. To ensure normal water flow, the height of the third segment 30 is lower than that of the first segment 29, and a water trough is provided at the top of the first segment 29, along which the sprayed wastewater flows to the second segment 28. Two parallel baffles 2 for accumulating water flow are fixedly provided at the second segment 28 and the third segment 30 of the diversion plate 1.

[0027] The hydraulic drive subsystem includes a transmission belt 3 rotatably mounted between two baffles 2, several rollers 4 rotatably disposed within the transmission belt 3 for supporting the transmission belt 3, and several water tanks 5 fixedly disposed on the outer ring of the transmission belt 3 for storing water. The transmission belt 3 is a chain plate type conveyor belt. The length direction of the transmission belt 3 is the same as that of the second section 28 of the diversion plate 1, and there is a gap 6 between the transmission belt 3 and the second section 28, which allows the sprayed wastewater to pass through.

[0028] It should be noted that when the spray wastewater falls freely downwards from the first section 29 of the diversion plate 1, it enters the water tank 5. As the amount of spray wastewater in the water tank 5 increases, the gravity of the spray wastewater causes the water tank 5 to move downwards, thereby causing the transmission belt 3 to rotate continuously. When the water tank 5 moves to below the transmission belt 3, it rotates, and the spray wastewater inside flows out from the outlet, emptying the water tank 5.

[0029] Among them, the roller 4 is rotatably mounted on the two baffles 2 via a rotating shaft.

[0030] Preferably, the power transmission subsystem includes two driving gears 7 fixedly mounted at both ends of the rotating shaft, driven gears 8 rotatably mounted on two baffles 2 and meshing with the two driving gears 7 respectively, a turntable 9 coaxial with the driven gears 8, and a crank 10 eccentrically mounted on the turntable 9. There are two of each of the above parts, which can ensure the stability of the transmission.

[0031] The pressurization subsystem includes a water tank 13 with an inlet 11 and an outlet 12, and an open top, fixedly mounted on the diversion plate 1, and a piston 14 rotatably connected to the crank 10 and located inside the water tank 13. The piston 14 is used to pressurize the mixture of ozone and spray wastewater in the water tank 13. Solenoid valves are provided at both the inlet 11 and the outlet 12 to control the inflow and outflow of the spray wastewater.

[0032] In this embodiment, the bottom of the water tank 13 is provided with several air inlets 15. The air supply subsystem includes an air pipe fixed in the air inlet 15 and an air supply component connected to the air pipe. Ozone enters the air inlet 15 through the air pipe and moves upward from the bottom of the water tank 13. During the movement, the ozone can fully contact the sprayed wastewater, which helps to improve the solubility of ozone in the sprayed wastewater.

[0033] It should be noted that when the transmission belt 3 rotates, it drives the roller 4 in contact with it to rotate, causing the shaft to rotate synchronously. The rotation of the shaft causes the drive gear 7 to rotate, which in turn drives the driven gear 8 to rotate, causing the turntable 9 to rotate. The turntable 9 drives the crank 10 to rotate. Because the crank 10 is installed at a non-central position on the turntable 9, it moves up and down during rotation, thus driving the piston 14 to move up and down within the water tank 13. When the piston 14 moves downwards, it pressurizes the ozone and the sprayed wastewater, increasing the solubility of ozone in the wastewater. This allows the ozone to be slowly released from the wastewater after being removed from the water tank 13, achieving delayed oxidation.

[0034] The diameter of the driving gear 7 is larger than that of the driven gear 8. The driving gear 7 rotates at a lower speed. By adjusting the diameter ratio of the driving gear 7 and the driven gear 8, the rotational speed of the driven gear 8 can be increased. This allows the crank 10 to drive the piston 14 to move back and forth quickly in the water tank 13, thereby improving the treatment efficiency of the sprayed wastewater. Example 2

[0035] Because the spray wastewater is a liquid and difficult to compress, if the piston 14 comes into direct contact with the spray wastewater, it can easily cause damage to the crank 10 or the power transmission subsystem.

[0036] To solve this problem, this embodiment also provides a buffer module between the crank 10 and the piston 14 to protect the piston 14.

[0037] The buffer module includes a pressure block 16 rotatably mounted on two cranks 10, several first telescopic components 17 (the telescopic components are telescopic rods, the same below) fixedly mounted on the bottom of the pressure block 16, and several elastic components 18 wound around the first telescopic components 17.

[0038] Among them, the end of the first telescopic component 17 away from the pressure block 16 is fixedly installed on the piston 14.

[0039] It should be noted that when the piston 14 comes into contact with the sprayed wastewater during the downward pressing process, it can no longer move. At this time, when the crank 10 moves downward, it drives the pressure block 16 to move downward, which causes the first telescopic component 17 and the elastic component 18 to shorten. The elastic component 18 is subjected to the downward pressure of the pressure block 16 and transmits the downward pressure to the piston 14 in a synchronous manner, so that the piston 14 continues to squeeze the sprayed wastewater.

[0040] When crank 10 moves upward, elastic element 18 first retracts to its initial length, then drives piston 14 to move upward. Elastic element 18 here has a large elastic coefficient and should only begin to shorten after piston 14 contacts the sprayed wastewater, ensuring its normal protective function. Example 3

[0041] Because ozone gas moves quickly in water, some ozone gas moves to the top of the spray wastewater before it can dissolve. When piston 14 is compressed, it can only contact the upper part of the spray wastewater. This results in more ozone dissolving in the upper layer of the spray wastewater, while the lower layer has difficulty contacting ozone, thus causing a large difference in ozone dissolution in the spray wastewater.

[0042] To solve this problem, in this embodiment, a second telescopic member 19 is fixedly installed on the bottom wall of the piston 14 inside the water tank 13. A first motor 20 is fixedly installed at the free end of the second telescopic member 19. A rotor 21 for raising the spray wastewater in the water tank 13 is fixedly installed at the output shaft end of the first motor 20. The rotor 21 includes a central fixed cylinder and several blades arranged circumferentially along the central fixed cylinder.

[0043] The first motor 20 is equipped with a floating block for controlling the height of the rotating wheel 21. The floating block generates buoyancy in the sprayed wastewater, which controls the height of the first motor 20 and the rotating wheel 21, ensuring that the rotating wheel 21 is positioned precisely at the surface of the sprayed wastewater. Under the control of the second telescopic component 19, the first motor 20 can move vertically without deviating from its designated direction.

[0044] A second motor 23 is fixedly mounted on the bottom wall of the piston 14 inside the water tank 13. Several blades 24 for cutting the spray wastewater raised by the rotating wheel 21 are fixedly mounted on the output shaft end of the second motor 23.

[0045] It should be noted that when the No. 1 motor 20 drives the rotor 21 to rotate, the blades come into contact with the sprayed wastewater, which can lift the sprayed wastewater, making the lifted sprayed wastewater higher than the overall sprayed wastewater level. After being lifted, the sprayed wastewater is enveloped by ozone gas, and under pressure, the ozone gas comes into full contact with this portion of the sprayed wastewater. By placing the rotor 21 on one side of the water tank 13, it can throw the sprayed wastewater from one side of the water tank 13 to the other side during operation, creating a lateral flow of sprayed wastewater in the water tank 13.

[0046] To accelerate the dissolution rate of ozone gas, the second motor 23 drives the blade 24 to rotate. The blade 24 cuts the sprayed wastewater that is being lifted, turning the wastewater into smaller droplets, which further improves the solubility of ozone in the sprayed wastewater. Example 4

[0047] In this embodiment, the piston 14 is fixedly provided with a third telescopic component 25 on the bottom wall inside the water tank 13, and a fourth telescopic component 26 communicating with the third telescopic component 25 is fixedly provided at the bottom of the water tank 13. A push plate 27 is fixedly provided at the telescopic end of the fourth telescopic component 26.

[0048] The third telescopic component 25 is equipped with a return spring inside, which is used to drive the third telescopic component 25 to retract.

[0049] It should be noted that the water entering the water tank 13 and the ozone entering the water tank 13 are carried out simultaneously. When the water tank 13 first starts to enter the water, the height of the spray wastewater is relatively low, and the rotor 21 has difficulty in raising the small amount of spray wastewater, which delays the overall progress.

[0050] With telescopic components 25 (number 3) and 26 (number 4), when the piston 14 moves downward, telescopic component 25 contacts the bottom of the water tank 13 and is compressed. At this time, the liquid inside telescopic component 25 enters telescopic component 26, causing it to extend. Conversely, when telescopic component 25 extends under the action of the return spring, it causes telescopic component 26 to shorten.

[0051] As piston 14 moves upward, water enters tank 13 simultaneously. At this time, telescopic component 25 extends and telescopic component 26 retracts. Telescopic component 26 pulls push plate 27 toward rotor 21, thereby scraping the spray wastewater at the bottom of tank 13 toward rotor 21. The spray wastewater accumulated at the bottom of tank 13 is distributed within tank 13 by the lifting effect of rotor 21, increasing the contact time and contact area between ozone and spray wastewater, thus increasing the volume of ozone in the spray wastewater.

[0052] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A delayed oxidation regeneration system for casting waste gas spray water, characterized in that, It includes a water flow guidance subsystem, a hydraulic drive subsystem located within the water flow guidance subsystem, a power transmission subsystem connected to the hydraulic drive subsystem, a pressurization subsystem connected to the power transmission subsystem, and a gas supply subsystem for supplying ozone gas to the pressurization subsystem. The downstream height of the water flow guiding subsystem is lower than its upstream height. The water flow guiding subsystem is used to introduce the spray wastewater to the hydraulic drive subsystem to drive the hydraulic drive subsystem to operate. This allows the hydraulic drive subsystem to drive the pressurization subsystem through the power transmission subsystem to pressurize the mixture of ozone and spray wastewater, thereby increasing the amount of ozone dissolved in the spray wastewater.

2. The casting waste gas spray water delayed oxidation regeneration system according to claim 1, characterized in that, The water flow guiding subsystem includes a continuously folded Z-shaped diversion plate (1), on which two parallel baffles (2) are fixedly installed for accumulating water flow. The hydraulic drive subsystem includes a transmission belt (3) rotatably mounted between two baffles (2), several rollers (4) rotatably disposed within the transmission belt (3) for supporting the transmission belt (3), and several water tanks (5) fixed on the outer ring of the transmission belt (3) for storing water. The length direction of the transmission belt (3) is the same as that of the middle section of the diversion plate (1), and there is a gap (6) between the transmission belt (3) and the middle section. Among them, the roller (4) is mounted on two baffles (2) by rotating through a shaft.

3. The casting waste gas spray water delayed oxidation regeneration system according to claim 2, characterized in that, The power transmission subsystem includes two driving gears (7) fixed at both ends of the shaft, driven gears (8) rotatably mounted on two baffles (2) and meshing with the two driving gears (7) respectively, a turntable (9) coaxial with the driven gears (8), and a crank (10) eccentrically mounted on the turntable (9). The pressurization subsystem includes a water tank (13) with an inlet (11) and an outlet (12) and an open top, which is fixed on the diversion plate (1) and a piston (14) rotatably connected to the crank (10) and located in the water tank (13). The piston (14) is used to pressurize the mixture of ozone and spray wastewater in the water tank (13). The inlet (11) and outlet (12) are each equipped with a solenoid valve for controlling the inflow and outflow of spray wastewater.

4. The casting waste gas spray water delayed oxidation regeneration system according to claim 3, characterized in that, The diameter of the driving gear (7) is greater than the diameter of the driven gear (8).

5. The casting waste gas spray water delayed oxidation regeneration system according to claim 3, characterized in that, The water tank (13) has several air inlets (15) at its inner bottom. The air supply subsystem includes an air pipe fixed in the air inlet (15) and an air supply component connected to the air pipe.

6. The casting waste gas spray water delayed oxidation regeneration system according to claim 5, characterized in that, A buffer module is also provided between the crank (10) and the piston (14) to protect the piston (14); The buffer module includes a pressure block (16) rotatably mounted on two cranks (10), a number of first telescopic components (17) fixedly mounted on the bottom of the pressure block (16), and a number of elastic components (18) wrapped around the first telescopic components (17). The end of the first telescopic component (17) away from the pressure block (16) is fixedly installed on the piston (14).

7. The casting waste gas spray water delayed oxidation regeneration system according to claim 6, characterized in that, The piston (14) is fixedly provided with a second telescopic component (19) on the bottom wall inside the water tank (13). A first motor (20) is fixedly provided at the free end of the second telescopic component (19). A wheel (21) for raising the spray wastewater in the water tank (13) is fixedly provided at the output shaft end of the first motor (20).

8. The casting waste gas spray water delayed oxidation regeneration system according to claim 7, characterized in that, The No. 1 motor (20) is equipped with a floating block (22) for controlling the height of the wheel (21).

9. The casting waste gas spray water delayed oxidation regeneration system according to claim 7, characterized in that, The piston (14) is fixedly mounted on the bottom wall of the water tank (13) with a second motor (23). The output shaft end of the second motor (23) is fixedly mounted with several blades (24) for cutting the spray wastewater raised by the rotating wheel (21).

10. The casting waste gas spray water delayed oxidation regeneration system according to claim 9, characterized in that, The piston (14) is fixedly provided with a No. 3 telescopic component (25) on the bottom wall inside the water tank (13). The bottom of the water tank (13) is fixedly provided with a No. 4 telescopic component (26) that communicates with the No. 3 telescopic component (25). The telescopic end of the No. 4 telescopic component (26) is fixedly provided with a push plate (27). The third telescopic component (25) is equipped with a return spring inside for driving the third telescopic component (25) to retract.

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