A kind of organic sewage gas floatation treatment device with cyclone pre-separation

Abstract

The utility model discloses a kind of refining organic sewage air flotation treatment devices with cyclone pre-separation, including cavity (1), it is characterized by: the bottom of the inside of cavity (1) is rotatably connected with shaft (2), the top of shaft (2) is fixed with impeller (3), the top of cavity (1) left side is penetrated and is sleeved with into sewage pipe (4), the bottom of cavity (1) left side is penetrated and is sleeved with sewage discharge pipe (5), the top of cavity (1) is penetrated and is fixed with connecting pipe (6), the right side of cavity (1) is bolted with pool (7), the bottom of the surface of connecting pipe (6) left side one end is provided with anti-vortex mechanism, the middle of the front of pool (7) is provided with air flotation mechanism, the right side of the top front end and rear end of pool (7) is provided with deslagging mechanism, the utility model can effectively inhibit the formation of vortex at pipe opening, reduce the case that impurity mixes into connecting pipe with water flow, to reduce the impurity content of entering air flotation pool, create favorable conditions for stable combination of air bubble and organic pollutant in air flotation pool, guarantee air flotation treatment effect.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, and specifically relates to a flotation treatment device for organic wastewater from refining and chemical industries with cyclone pre-separation. Background Technology

[0002] Refining organic wastewater is industrial or domestic wastewater mainly composed of organic pollutants. Its chemical oxygen demand (COD) usually exceeds 2000 mg / L. It mainly comes from industries such as papermaking, leather, and food processing. Its components include carbohydrates, proteins, and oils. It easily leads to eutrophication of water bodies. During decomposition, it consumes dissolved oxygen and releases harmful gases such as hydrogen sulfide. Based on the difficulty of degradation, it can be divided into three categories: easily degradable, degradable containing harmful substances, and difficult to degrade. Air flotation device refers to a device that mainly uses a large number of microbubbles to capture and adsorb fine particulate matter and make it float to the surface, so as to achieve the effect of solid-liquid separation.

[0003] However, traditional air flotation treatment devices for organic wastewater from refining and chemical industries cannot pre-treat impurities and wastewater, resulting in a large amount of impurities entering the air flotation tank. This not only significantly increases the treatment load of the air flotation tank but also easily interferes with the combination process of air bubbles and organic pollutants in the tank, impairing the treatment effect of the air flotation tank on organic wastewater. Ultimately, this leads to a reduction in the overall treatment efficiency of the device for organic wastewater from refining and chemical industries. At the same time, because it cannot suppress the formation of eddies at the pipe openings, impurities are easily mixed into the pipes with the water flow and enter the air flotation tank, reducing the effectiveness of impurity removal in the pre-separation stage.

[0004] To address the problems mentioned in the background above, a flotation treatment device for organic wastewater from refining and chemical industries with cyclone pre-separation is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a flotation treatment device for organic wastewater from refining and chemical industries with cyclone pre-separation, the advantages of which are cyclone pre-separation and anti-vortex baffle.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a flotation treatment device for organic wastewater from refining and chemical processing with cyclone pre-separation, comprising a cavity, a rotating shaft rotatably connected to the bottom of the cavity, an impeller fixedly sleeved on the top of the rotating shaft, an inlet pipe passing through and sleeved on the top left side of the cavity, a outlet pipe passing through and sleeved on the bottom left side of the cavity, a connecting pipe passing through and fixedly sleeved on the top of the cavity, a tank bolted to the right side of the cavity, an anti-vortex mechanism provided at the bottom of the left end surface of the connecting pipe, a flotation mechanism provided in the middle of the front of the tank, and slag removal mechanisms provided on the right side of the front and rear ends of the top of the tank.

[0007] The above technical solution involves the following steps: The organic wastewater from the refining process enters the chamber through the inlet pipe. During the flow, the impeller rotates, causing the wastewater to swirl within the chamber. The centrifugal force generated by this swirling flow pushes impurities in the wastewater towards the inner wall of the chamber. Subsequently, the impurities settle to the bottom of the chamber under gravity and are discharged through the outlet pipe. The wastewater, after pre-separation by the swirling flow, enters the pool on the right side of the chamber through a connecting pipe for subsequent air flotation treatment to remove organic pollutants. This device utilizes centrifugal force to achieve efficient pre-treatment separation of impurities and wastewater, effectively reducing the impurity content entering the air flotation tank, lowering the treatment load of the air flotation tank, and preventing impurities from interfering with the combination process of air bubbles and organic pollutants within the air flotation tank. This ensures the treatment effect of the air flotation tank on organic wastewater. Impurities around the inner wall can settle and be discharged to the bottom, improving the impurity removal function of the pre-separation stage, reducing impurity retention and accumulation, and enhancing the overall treatment efficiency of the device for refining organic wastewater.

[0008] The present invention is further configured such that the anti-vortex mechanism includes an annular plate one, which is fixedly sleeved at the bottom of the left end surface of the connecting pipe. The annular plate one has baffles welded to its front end, rear end and both sides. The top of the baffles has an annular plate two welded to its top, and the interior of the annular plate two is fixedly sleeved with the middle of the left end surface of the connecting pipe.

[0009] The above technical solution employs an anti-vortex mechanism. When the pre-separated wastewater flows from the top of the chamber to the connecting pipe, the first and second annular plates form upper and lower limits. The front, rear, and side baffles between them divide the water flow towards the connecting pipe, effectively blocking the formation of vortices at the pipe opening. This structure prevents impurities that have not fully settled near the inner wall of the chamber from being drawn into the connecting pipe by the vortex. It also guides a small amount of fine impurities to settle back into the chamber along the gap between the baffles and the annular plates, providing stable influent conditions for subsequent flotation treatment. This effectively suppresses the formation of vortices at the pipe opening, reduces the amount of impurities mixed into the connecting pipe with the water flow, and thus reduces the impurity content entering the flotation tank. It creates favorable conditions for the stable combination of air bubbles and organic pollutants in the flotation tank, ensuring the flotation treatment effect. It can also guide a small amount of fine impurities that have not been completely blocked to settle back into the vortex chamber.

[0010] The present invention is further configured such that the air flotation mechanism includes a dissolved air release device, the dissolved air release device is located in the middle of the front of the tank, the top of the dissolved air release device is connected to a dissolved air tank, the top of the dissolved air tank is connected to an air compressor, the left side of the dissolved air tank is connected to a circulation pump, and the bottom of the circulation pump is connected to the left side of the front of the tank.

[0011] The above technical solution involves setting up an air flotation mechanism. First, coagulants or air flotation agents are added to the wastewater in the tank to increase the air flotation effect. A circulating pump draws wastewater from the tank and transports it to a dissolved air tank. At the same time, an air compressor introduces air into the dissolved air tank, allowing the air and wastewater to mix thoroughly to form dissolved air water. Subsequently, the dissolved air water enters the tank through a dissolved air release device connected to the center of the front of the tank. The dissolved air release device releases the air in the dissolved air water into tiny bubbles. These bubbles adsorb organic pollutants in the wastewater and carry them to the surface, thereby achieving the separation of organic pollutants from the wastewater.

[0012] The present invention is further configured such that the slag removal mechanism includes a bracket, the bracket is bolted to the right side of the front end and rear end of the top of the pool, two rotating rods are rotatably connected to the two sides of the opposite side of the two brackets, a motor is fixedly sleeved on the front side of the left rotating rod, a synchronous pulley is fixedly sleeved on the front end and rear end of the rotating rod near the middle, a synchronous belt is sleeved on the surface of the two synchronous pulleys at one end, and a scraper is fixedly connected to the surface of the synchronous belt.

[0013] The above technical solution is adopted: by setting up a slag removal mechanism, the motor drives the left rotating rod to rotate, the rotating rod drives the synchronous wheel on the surface to rotate, and the synchronous wheel drives the right rotating rod to rotate synchronously through the synchronous belt. As the synchronous belt circulates, the scraper fixed on its surface moves accordingly. During the movement, the scraper can scrape off the scum on the surface of the pool, thereby realizing the separation and removal of scum in the sewage.

[0014] The present invention is further configured such that one end of the sewage inlet pipe on the right side is tangentially connected to the cavity.

[0015] The above technical solution is adopted: by setting it to be tangential, the tangential inlet pipe can make the sewage form a stable vortex in the cavity, and the centrifugal force can be used to push impurities to adhere to the cavity wall, reducing the number of impurities that enter the subsequent stages with the water flow.

[0016] The present invention is further configured such that a water valve is sleeved on the left side of the surface of the sewage pipe.

[0017] The above technical solution involves installing a water valve to control the discharge of wastewater containing impurities that settles to the bottom of the cavity.

[0018] The present invention is further configured such that a drain pipe is inserted through and fixedly sleeved on the right side of the front of the pool.

[0019] The above technical solution involves installing a drain pipe to discharge the water after flotation treatment, with the discharge controlled by a valve.

[0020] The present invention is further provided that a sealing ring is fitted onto the bottom of the rotating shaft surface.

[0021] The above technical solution, by setting a sealing ring, can prevent leakage, and by using an interference fit, it has a dynamic sealing function.

[0022] In summary, this utility model has the following beneficial effects: 1. This utility model uses centrifugal force to achieve efficient separation of impurities and wastewater in pretreatment, effectively reducing the impurity content entering the flotation tank, reducing the treatment load of the flotation tank, avoiding interference of impurities with the combination process of bubbles and organic pollutants in the flotation tank, ensuring the treatment effect of the flotation tank on organic wastewater, and the impurities around the inner wall can be concentrated to the bottom and discharged through sedimentation, which can improve the impurity removal function of the pre-separation stage, reduce the retention and accumulation of impurities, and improve the overall treatment efficiency of the device for refining organic wastewater. 2. This utility model can effectively suppress the formation of eddies at the pipe opening, reduce the situation where impurities are mixed into the connecting pipe with the water flow, and thus reduce the impurity content entering the flotation tank. It creates favorable conditions for the stable combination of air bubbles and organic pollutants in the flotation tank, ensures the flotation treatment effect, and can guide a small amount of fine impurities that are not completely blocked to settle back into the swirling flow cavity. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial front sectional view of the structure of this utility model; Figure 3 This is a utility model Figure 2 An enlarged schematic diagram of the structure at point A in the middle.

[0024] Reference numerals in the attached drawings: 1. Cavity; 2. Rotating shaft; 3. Impeller; 4. Inlet pipe; 5. Outlet pipe; 6. Connecting pipe; 7. Pool; 8. Annular plate one; 9. Annular plate two; 10. Baffle; 11. Dissolved gas release device; 12. Dissolved gas tank; 13. Air compressor; 14. Circulating pump; 15. Support; 16. Rotating rod; 17. Motor; 18. Synchronous pulley; 19. Synchronous belt; 20. Scraper; 21. Water valve; 22. Drain pipe; 23. Sealing ring. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Example 1: refer to Figure 1 , Figure 2 , Figure 3A flotation treatment device for organic wastewater from refining and chemical processing with cyclone pre-separation includes a cavity 1. A rotating shaft 2 is rotatably connected to the bottom of the cavity 1. An impeller 3 is fixedly sleeved on the top of the rotating shaft 2. An inlet pipe 4 is threaded through and sleeved on the top left side of the cavity 1. A discharge pipe 5 is threaded through and sleeved on the bottom left side of the cavity 1. A connecting pipe 6 is threaded through and fixedly sleeved on the top of the cavity 1. A tank 7 is bolted to the right side of the cavity 1. An anti-vortex mechanism is provided on the bottom of the left end surface of the connecting pipe 6. A flotation unit is located in the center of the front of the tank 7. The structure includes a slag removal mechanism at the top front end and the right side of the rear end of the pool 7. The organic wastewater from the refining process enters the cavity 1 through the inlet pipe 4. During the flow, the impeller 3 rotates, causing the wastewater in the cavity 1 to form a vortex. The centrifugal force generated by the vortex pushes the impurities in the wastewater towards the inner wall of the cavity 1. Subsequently, the impurities settle to the bottom of the cavity 1 under the action of gravity and are discharged through the drain pipe 5. The wastewater that has been pre-separated by the vortex flows through the connecting pipe 6 into the pool 7 on the right side of the cavity 1 for subsequent air flotation treatment to remove organic pollutants.

[0027] refer to Figure 1 The flotation mechanism includes a dissolved air release device 11, which is located in the middle of the front of the tank 7. The top of the dissolved air release device 11 is connected to a dissolved air tank 12, and the top of the dissolved air tank 12 is connected to an air compressor 13. The left side of the dissolved air tank 12 is connected to a circulation pump 14, and the bottom of the circulation pump 14 is connected to the left side of the front of the tank 7. By setting up the flotation mechanism, coagulant or flotation agent is first added to the sewage in the tank 7 to increase the flotation effect. The circulation pump 14 draws sewage from the tank 7 and transports it to the dissolved air tank 12. At the same time, the air compressor 13 introduces air into the dissolved air tank 12, so that the air and sewage are fully mixed in the dissolved air tank 12 to form dissolved air water. Then, the dissolved air water enters the tank through the dissolved air release device 11 connected to the middle of the front of the tank 7. The dissolved air release device 11 releases the air in the dissolved air water into fine bubbles. The bubbles adsorb organic pollutants in the sewage and carry them to the surface, thereby achieving the separation of organic pollutants from sewage.

[0028] refer to Figure 1 , Figure 2The slag removal mechanism includes a bracket 15, which is bolted to the right side of the front and rear ends of the top of the tank 7. Two rotating rods 16 are rotatably connected to the two sides of the opposite side of the two brackets 15. A motor 17 with a power of 0.5-1.5kW is fixedly sleeved on the front side of the left rotating rod 16. Synchronous pulleys 18 are fixedly sleeved on the front and rear ends of the rotating rod 16 near the middle. A synchronous belt 19 is sleeved on the surface of the two synchronous pulleys 18 at one end. A scraper 20 is fixedly connected to the surface of the synchronous belt 19. With the slag removal mechanism, the motor 17 drives the left rotating rod 16 to rotate, and the rotating rod 16 drives the synchronous pulleys 18 on the surface to rotate. The synchronous pulleys 18 drive the right rotating rod 16 to rotate synchronously through the synchronous belt 19. As the synchronous belt 19 circulates, the scraper 20 fixed on its surface moves accordingly. During the movement, the scraper 20 can scrape off the scum on the surface of the tank 7, thereby realizing the separation and removal of scum in the sewage.

[0029] refer to Figure 1 , Figure 2 One end of the sewage inlet pipe 4 is configured to be tangentially connected to the cavity 1. By configuring it to be tangential, the sewage inlet pipe 4 can form a stable vortex in the cavity 1, and the centrifugal force can be used to push impurities to adhere to the cavity wall, reducing the amount of impurities that enter the subsequent stages with the water flow.

[0030] Referring to the figure, a water valve 21 is sleeved on the left side of the surface of the sewage pipe 5. By setting the water valve 21, the sewage containing impurities that settles to the bottom of the cavity 1 can be discharged.

[0031] refer to Figure 1 A drain pipe 22 is connected and fixed to the right side of the front of the pool 7. The water after the flotation treatment can be discharged through the drain pipe 22 and the discharge is controlled by a valve.

[0032] refer to Figure 2 A sealing ring 23 is fitted onto the bottom of the surface of the rotating shaft 2. By setting the sealing ring 23, leakage can be prevented. Through interference fit, it has a dynamic sealing function and is made of fluororubber.

[0033] Example 2: refer to Figure 2 , Figure 3A flotation treatment device for organic wastewater from refining and chemical processing with swirling pre-separation is disclosed. The organic wastewater from refining and chemical processing enters the cavity 1 through the inlet pipe 4. During the flow, the impeller 3 rotates, causing the wastewater in the cavity 1 to form a swirling flow. The centrifugal force generated by the swirling flow pushes the impurities in the wastewater towards the inner wall of the cavity 1. Subsequently, the impurities settle to the bottom of the cavity 1 under the action of gravity and are discharged through the drain pipe 5. The wastewater after swirling pre-separation enters the pool 7 on the right side of the cavity 1 through the connecting pipe 6 for subsequent flotation treatment to remove organic pollutants. When the wastewater after swirling pre-separation flows from the top of the cavity 1 to the connecting pipe 6, the annular plate 8 and the annular plate 9 form upper and lower limits. The front, rear and side baffles 10 between them divide the water flow towards the connecting pipe 6, effectively blocking the formation of vortices at the pipe opening. This structure can prevent impurities that have not settled completely near the inner wall of the cavity 1 from being drawn into the connecting pipe 6 by the vortex. It can also guide a small amount of fine impurities to settle back into the cavity 1 along the gap between the baffles 10 and the annular plate, providing stable water intake conditions for subsequent flotation treatment.

[0034] The dissolved gas release device 11 is a TV-Ⅱ type stainless steel dissolved gas release device, made of 316 stainless steel. Its core structure is an orifice-single chamber-parallel disc slit design with trapezoidal annular protrusions to prevent clogging. It can release 99% of the dissolved gas volume, generating bubbles with a diameter of 20-40μm. It is suitable for working pressures of 0.2-0.4MPa, with a single unit flow rate of 2.0-3.12m³ / h (at 0.2-0.4MPa pressure), an operating diameter of 600mm, and an interface diameter of 32mm. It must be installed horizontally.

[0035] The dissolved gas tank 12 is a DED-007 type vertical 316L stainless steel dissolved gas tank. It is made of 316 stainless steel and its core structure is an orifice-single chamber-parallel disc gap design with trapezoidal annular convex teeth to prevent clogging. It can release 99% of the dissolved gas volume, generating bubbles with a diameter of 20-40μm. It is suitable for working pressure of 0.2-0.4MPa, with a single unit flow rate of 2.0-3.12m³ / h (at 0.2-0.4MPa pressure), an operating diameter of 600mm, and an interface diameter of 32mm. It must be installed horizontally.

[0036] Air compressor 13 is a 2Z2-6 / 8 type piston air compressor with a completely oil-free lubrication design to avoid oil pollution of wastewater; it adopts a piston or scroll compression structure, and the discharge pressure is stable and adjustable; it is equipped with a pressure control system that can maintain a working pressure of 0.3-0.5MPa; the motor protection level is IP54, which is suitable for humid working conditions; the discharge volume is ≥360m³ / h, the discharge pressure is 0.8MPa (which can be reduced to 0.3-0.5MPa through the pressure regulating valve); the motor power is 45kW, the speed is 585r / min, and the cooling method is water cooling (total water consumption 4t / h).

[0037] The circulating pump 14, model IHF40-25-160, adopts a single-stage cantilever structure. The flow-through components are lined with fluoroplastic (F46) or steel-lined ultra-high molecular weight polyethylene (UHMWPE), which is resistant to strong acids, strong alkalis, and chloride-containing media corrosion. The impeller is a closed non-metallic structure with smooth flow channels to reduce impurity blockage. The shaft seal adopts an external bellows mechanical seal, with the stationary ring made of silicon carbide and the rotating ring made of PTFE-filled material. It is suitable for conveying sewage containing particles, with a flow rate of 6.3-25 m³ / h (suitable for devices with a treatment capacity of 5-20 m³ / h), a head of 15-30 m, a speed of 1450 r / min, an inlet diameter of 50 mm, and an operating temperature of ≤100℃.

[0038] Brief description of the usage process: The organic wastewater from the refining process enters the cavity 1 through the inlet pipe 4. During the flow, the impeller 3 rotates, causing the wastewater in the cavity 1 to form a vortex. The centrifugal force generated by the vortex pushes the impurities in the wastewater towards the inner wall of the cavity 1. Subsequently, the impurities settle to the bottom of the cavity 1 under the action of gravity and are discharged through the drain pipe 5. The wastewater after the vortex pre-separation enters the pool 7 on the right side of the cavity 1 through the connecting pipe 6 for subsequent air flotation treatment to remove organic pollutants. When the wastewater after the vortex pre-separation flows from the top of the cavity 1 to the connecting pipe 6, the annular plate 8 and the annular plate 9 form upper and lower limits. The front, rear and side baffles 10 between them divide the water flow towards the connecting pipe 6, effectively blocking the formation of vortices at the pipe opening. This structure can prevent impurities that have not settled completely near the inner wall of the cavity 1 from being drawn into the connecting pipe 6 by the vortex. It can also guide a small amount of fine impurities to settle back into the cavity 1 along the gap between the baffles 10 and the annular plate, providing stable water intake conditions for subsequent air flotation treatment.

[0039] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.

[0040] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A flotation treatment device for organic wastewater from refining and chemical industries with cyclone pre-separation, comprising, characterized in that: The cavity (1) is characterized in that: a rotating shaft (2) is rotatably connected to the bottom of the cavity (1), an impeller (3) is fixedly sleeved on the top of the rotating shaft (2), a sewage inlet pipe (4) is inserted and sleeved on the top of the left side of the cavity (1), a sewage outlet pipe (5) is inserted and sleeved on the bottom of the left side of the cavity (1), a connecting pipe (6) is inserted and fixedly sleeved on the top of the cavity (1), a pool (7) is bolted to the right side of the cavity (1), an anti-vortex mechanism is provided on the bottom of the left end surface of the connecting pipe (6), an air flotation mechanism is provided in the middle of the front of the pool (7), and a slag removal mechanism is provided on the right side of the front and rear ends of the top of the pool (7).

2. The air flotation treatment device for refining organic wastewater with cyclone pre-separation as described in claim 1, characterized in that: The anti-vortex mechanism includes an annular plate one (8), which is fixedly sleeved at the bottom of the left end surface of the connecting pipe (6). The annular plate one (8) has baffles (10) welded to its front end, rear end and both sides. The baffles (10) have an annular plate two (9) welded to its top, and the interior of the annular plate two (9) is fixedly sleeved with the middle of the left end surface of the connecting pipe (6).

3. The air flotation treatment device for refining organic wastewater with cyclone pre-separation as described in claim 1, characterized in that: The air flotation mechanism includes a dissolved air release device (11), which is located in the middle of the front of the tank (7). The top of the dissolved air release device (11) is connected to a dissolved air tank (12), the top of the dissolved air tank (12) is connected to an air compressor (13), and the left side of the dissolved air tank (12) is connected to a circulation pump (14), and the bottom of the circulation pump (14) is connected to the left side of the front of the tank (7).

4. The air flotation treatment device for refining organic wastewater with cyclone pre-separation as described in claim 1, characterized in that: The slag removal mechanism includes a bracket (15), which is bolted to the right side of the front and rear ends of the top of the pool (7). Rotating rods (16) are rotatably connected to the two sides of the opposite side of the two brackets (15). A motor (17) is fixedly sleeved on the front of the rotating rod (16) on the left side. Synchronous pulleys (18) are fixedly sleeved on the front and rear ends of the rotating rod (16) near the middle. A synchronous belt (19) is sleeved on the surface of the two synchronous pulleys (18) at one end. A scraper (20) is fixedly connected to the surface of the synchronous belt (19).

5. The air flotation treatment device for refining organic wastewater with cyclone pre-separation as described in claim 1, characterized in that: One end of the inlet pipe (4) on the right side is configured to be tangentially connected to the cavity (1).

6. The air flotation treatment device for refining organic wastewater with cyclone pre-separation according to claim 1, characterized in that: A water valve (21) is fitted onto the left side of the surface of the sewage pipe (5).

7. The air flotation treatment device for refining organic wastewater with cyclone pre-separation according to claim 1, characterized in that: A drain pipe (22) is inserted through and fixedly sleeved on the right side of the front of the pool (7).

8. The air flotation treatment device for refining organic wastewater with cyclone pre-separation according to claim 1, characterized in that: A sealing ring (23) is fitted onto the bottom of the surface of the rotating shaft (2).

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