An integrated medical wastewater treatment equipment

Abstract

This invention discloses an integrated medical wastewater treatment device, including an aerator. The aerator comprises an upper aeration disc, a middle aeration disc, a lower aeration disc, a spiral disc, and an air inlet pipe, connected sequentially from top to bottom and communicating with each other. The top surface of the upper aeration disc has a first aeration hole, and the circumferential side surface of the upper aeration disc has a second aeration hole. The top surface of the middle aeration disc has a third aeration hole, and the circumferential side surface of the middle aeration disc has a fourth aeration hole. The top surface of the lower aeration disc has a fifth aeration hole. The spiral disc is formed by an inner spiral surface, an outer spiral surface, and an end face. The outer spiral surface has a sixth aeration hole, the inner spiral surface has a seventh aeration hole, and the connection between the inner and outer spiral surfaces has an eighth aeration hole, which is distributed along the height direction. This device makes the bubbles generated by the aerator in the aerobic tank finer, more evenly distributed, and larger in area.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment, specifically, it relates to an integrated medical wastewater treatment device. Background Technology

[0002] Integrated medical wastewater treatment equipment is widely used for treating medical wastewater containing large amounts of toxic and harmful substances, chemical pollutants, and radioactive contaminants, as well as pathogenic microorganisms. The aerobic tank is a key component of this equipment. Aerators arranged in a grid pattern at the bottom of the tank oxygenate the water, dissolving oxygen in the wastewater and allowing it to fully contact the biofilm. Through adsorption by the biofilm, organic matter is decomposed into inorganic matter, thus removing pollutants. However, existing aeration systems have the following shortcomings: Firstly, the gas flow direction is vertically upward or nearly vertically upward, resulting in poor dissolved oxygen effects between adjacent aerators and uneven distribution on the sludge active surface; the vertically upward air jets from the aerators limit the amount of dissolved oxygen available. Secondly, the poor flowability of the wastewater at the bottom of the tank causes sludge to settle, preventing activated sludge microorganisms from receiving sufficient oxygen, leading to uneven sludge distribution and activity. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an integrated medical wastewater treatment device in which the bubbles generated by the aerator in the aerobic tank become finer, more evenly distributed, and larger in area; at the same time, the aeration effect at the bottom of the tank is increased, so that the activated sludge is fully dissolved in the water, thereby balancing the dissolved oxygen efficiency of the entire tank.

[0004] To address the aforementioned technical problems, this invention provides an integrated medical wastewater treatment device. The device includes an aerator comprising an upper aeration disc, a middle aeration disc, a lower aeration disc, a spiral disc, and an air inlet pipe, connected sequentially from top to bottom and communicating with each other. The upper aeration disc has a first aeration hole on its top surface and a second aeration hole on its circumferential side surface. The middle aeration disc has a third aeration hole on its top surface and a fourth aeration hole on its circumferential side surface. The lower aeration disc has a fifth aeration hole on its top surface. The spiral disc is formed by an inner spiral surface, an outer spiral surface, and an end face. The outer spiral surface has a sixth aeration hole, the inner spiral surface has a seventh aeration hole, and an eighth aeration hole is located at the junction of the inner and outer spiral surfaces. The eighth aeration hole is distributed along the height direction.

[0005] As a preferred embodiment, the upper aeration disc is a hollow first frustum, with the smaller end of the first frustum located above the larger end; the middle aeration disc is a hollow second frustum, with the smaller end of the second frustum located above the larger end; the upper diameter of the second frustum is larger than the lower diameter of the first frustum; the lower aeration disc is a hollow cylinder, with the diameter of the lower aeration disc being larger than the lower diameter of the middle aeration disc; and the spiral disc is a hollow spiral cylinder.

[0006] As a preferred example, the taper of the second frustum is greater than the taper of the first frustum.

[0007] As a preferred embodiment, the top of the upper aeration disc is a flat surface, and the center line of the first aeration hole is parallel to the axis of the aerator; or, the top of the upper aeration disc is an upwardly convex arc surface, and the center line of the first aeration hole intersects with the axis of the aerator.

[0008] As a preferred example, the diameter of the second aeration hole is larger than the diameter of the first aeration hole, the center distance of the second aeration hole is 1.5 to 2.0 times that of the center distance of the first aeration hole, and the diameter of the second aeration hole is 150 to 200 μm.

[0009] As a preferred embodiment, the centerline of the third aeration hole is parallel to the axis of the aerator; the center distance of the fourth aeration hole is 1.5 to 2.0 times that of the center distance of the fifth aeration hole; the diameter of the fourth aeration hole is 150 to 200 μm; the centerline of the fifth aeration hole is parallel to the axis of the aerator, and the diameters of the fifth aeration hole, the first aeration hole, and the third aeration hole are equal; the center distances of the fifth aeration hole, the first aeration hole, and the third aeration hole are equal; the diameter of the first aeration hole 11 is 80 to 120 μm.

[0010] As a preferred example, the device further includes a swirling fluid that extends inside the outer spiral surface in a spiral shape; the eighth aeration hole is opposite to the surface of the swirling fluid.

[0011] As a preferred example, the swirling fluid extends out from the side of the lower aeration disc.

[0012] As a preferred example, there are N aerators, and the N aerators are connected to the air supply pipeline through an air inlet pipe; N is an integer greater than 1.

[0013] As a preferred example, the aerators are arranged in an array.

[0014] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: In an integrated medical wastewater treatment device according to an embodiment of the present invention, after air is sprayed out from the aerator in the aerobic tank, it is sprayed and cut and collided with each other in all directions at different heights, multiple levels and multiple directions, making the bubbles smaller and denser, increasing the aeration range, enhancing the dissolved oxygen effect, and reducing the number of aerators; at the same time, the air-water mixture sprayed at an angle between adjacent aerators cuts each other, making the bubbles finer and denser, further improving the dissolved oxygen efficiency; the aeration effect at the bottom of the tank is enhanced, allowing the activated sludge to fully dissolve in the water and balancing the sludge activity in the height direction. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the aerator in an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram showing the position of the aeration holes on the aerator in an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the tilted spray angle of the aerator in an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the spiral disk structure in an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram showing the positions of the swirling fluid and the outer helical surface in an embodiment of the present invention.

[0020] The diagram includes: upper aeration disc 1, first aeration hole 11, second aeration hole 12, middle aeration disc 2, third aeration hole 21, fourth aeration hole 22, lower aeration disc 3, fifth aeration hole 31, spiral disc 4, sixth aeration hole 41, spiral cavity 42, seventh aeration hole 43, eighth aeration hole 44, swirling fluid 45, and air inlet pipe 5. Detailed Implementation

[0021] The technical solution of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] like Figure 1 and Figure 2 As shown, an integrated medical wastewater treatment device according to an embodiment of the present invention includes an aerator. The aerator includes an upper aeration disc 1, a middle aeration disc 2, a lower aeration disc 3, a spiral disc 4, and an air inlet pipe 5, which are connected and communicate with each other from top to bottom. The top surface of the upper aeration disc 1 is provided with a first aeration hole 11, and the circumferential side surface of the upper aeration disc 1 is provided with a second aeration hole 12. The top surface of the middle aeration disc 2 is provided with a third aeration hole 21, and the circumferential side surface of the middle aeration disc 2 is provided with a fourth aeration hole 22. The top surface of the lower aeration disc 3 is provided with a fifth aeration hole 31. The spiral disc 4 is surrounded by an inner spiral surface, an outer spiral surface, and an end face. The outer spiral surface is provided with a sixth aeration hole 41, the inner spiral surface is provided with a seventh aeration hole 43, and the connection between the inner and outer spiral surfaces is provided with an eighth aeration hole 44, which is distributed along the height direction. Preferably, the aerator is made of ceramic material.

[0023] In the above embodiment, the bottom end of the upper aeration disc 1 is connected to the upper end of the middle aeration disc 2, the lower end of the middle aeration disc 2 is connected to the upper end of the lower aeration disc 3, the spiral disc 4 is disposed at the bottom end of the lower aeration disc 3, and the upper end of the air inlet pipe 5 is connected to the bottom end of the spiral disc 4. The first aeration hole 11, the second aeration hole 12, the third aeration hole 21, the fourth aeration hole 22, the fifth aeration hole 31, the sixth aeration hole 41, the seventh aeration hole 43, and the eighth aeration hole 44 are all through holes. During operation, compressed air is introduced into the air inlet pipe 5, and the compressed air is ejected from the first aeration hole 11, the second aeration hole 12, the third aeration hole 21, the fourth aeration hole 22, the fifth aeration hole 31, the sixth aeration hole 41, the seventh aeration hole 43, and the eighth aeration hole 44. The airflow mixes with external water to form a steam-water mixture. Because of the multiple aeration holes, multiple streams of air-water mixture are formed, making the bubbles smaller and denser, increasing the aeration range and enhancing the dissolved oxygen effect. Simultaneously, the multiple streams of air-water mixture cut and mix with each other, making the bubbles even finer and further improving dissolved oxygen efficiency. This structure enhances the aeration effect at the bottom of the tank, allowing the activated sludge to fully dissolve in the water and balancing the sludge activity along the height direction.

[0024] Preferred, such as Figure 2 As shown, the upper aeration disc 1 is a hollow first frustum, with its smaller end above its larger end. The cross-sectional area of ​​the upper aeration disc 1 gradually increases from top to bottom. The middle aeration disc 2 is a hollow second frustum, with its smaller end above its larger end. The cross-sectional area of ​​the middle aeration disc 2 gradually increases from top to bottom. The upper diameter of the second frustum is larger than the lower diameter of the first frustum. Preferably, the upper diameter of the second frustum is 20-100 mm larger than the lower diameter of the first frustum. The lower aeration disc 3 is a hollow cylinder, with its diameter larger than the lower diameter of the middle aeration disc 2. Preferably, the diameter of the lower aeration disc 3 is 20-100 mm larger than the lower diameter of the middle aeration disc 2. The spiral disc 4 is a hollow spiral cylinder.

[0025] The upper aeration disc 1 is closed at the top and open at the bottom. The middle aeration disc 2 is open at both the top and bottom. The lower aeration disc 3 is open at both the top and bottom. The lower end of the upper aeration disc 1 is fitted to the upper end of the middle aeration disc 2, the lower end of the middle aeration disc is fitted to the upper end of the lower aeration disc 3, and the upper end of the spiral disc 4 is fitted to the lower end of the lower aeration disc 3; the upper end of the air inlet pipe 5 is connected to the lower end of the spiral disc 4. The inner cavities of the upper aeration disc 1, middle aeration disc 2, lower aeration disc 3, and spiral disc 4 together form a semi-enclosed space with an open bottom (connected to the air inlet pipe).

[0026] like Figure 3As shown, the taper of the second frustum is greater than that of the first frustum. The tapers of the second and first frustums are not equal, and the taper of the second frustum is greater than that of the first frustum. This causes the mixture formed by the interaction of the second and third carbonated water mixtures to collide and mix again with the mixture formed by the interaction of the fourth and fifth carbonated water mixtures, further increasing the dissolved oxygen rate.

[0027] Preferably, the top of the upper aeration disc 1 is a flat surface, and the centerline of the first aeration hole 11 is parallel to the axis of the aerator; or, the top of the upper aeration disc 1 is a convex arc surface, and the centerline of the first aeration hole 11 intersects the axis of the aerator. When the centerline of the first aeration hole 11 is parallel to the axis of the aerator, the gas ejected from the first aeration hole 11 is parallel to each other, transferring oxygen to the upper water body and forming a first air-water mixture with the external water body. When the centerline of the first aeration hole 11 intersects the axis of the aerator, the gas ejected from the first aeration hole 11 is ejected upward and outward, forming a first air-water mixture, and the extension line of the first air-water mixture passes through the center of the arc-shaped top plate of the upper aeration disc 1.

[0028] Preferably, the orifice diameter of the second aeration hole 12 is larger than that of the first aeration hole 11, and the center-to-center distance (in both circumferential and generatric directions) of the second aeration holes 12 is 1.5 to 2.0 times that of the center-to-center distance of the first aeration holes 11; the orifice diameter of the second aeration hole 12 is 150 to 200 μm. The gas velocity ejected from the second aeration hole 12 is 0.2 to 0.5 m / s lower than that ejected from the first aeration hole 11. Preferably, the orifice diameter of the first aeration hole 11 is 80 to 120 μm. The first aeration holes 11 are densely distributed on the top of the upper aeration disc 1. Parallel or radial compressed air with a certain pressure and very small spacing is ejected at high speed from the first aeration holes 11 into the upper water body, generating very small diameter bubbles, which mix with the upper water body to form a first air-water mixture, continuously transferring oxygen into the water body during the movement. The velocity and intensity of the gas ejected outward and upward through the second aeration hole 12 are both less than those ejected upward through the first aeration hole 11. The second aeration hole 12 has the following functions: First, it generates obliquely ejected gas upward and outward in the circumferential direction of the upper aeration disc 1. On a generatrix of a certain circumferential direction, the gas ejected at different heights has the same velocity direction, i.e., parallel fluid. The aeration effect is the same on any frustum concentric with the surface of the first frustum, thereby balancing the dissolved oxygen effect of different radii and directions. The compressed air jets, each in parallel, are angled upwards and outwards from the second aeration hole 12 into the surrounding water, oxygenating the water above the central aeration plate and forming a second air-water mixture. Secondly, the angled outward spray of compressed air increases the range of oxygen exchange with the water. Thirdly, the air collides and cuts with the first and second air-water mixtures sprayed from other upper aeration plates, making the water droplets and bubbles smaller and denser, transferring more oxygen to the water and improving oxygen transfer efficiency. Fourthly, the air collides and cuts with the third air-water mixture sprayed upwards from the central aeration plate, making the water droplets and bubbles even smaller and denser. Simultaneously, since both compressed air streams flow upwards or angled upwards, there is no waste of resources from downward aeration, avoiding weakening the aeration and oxygenation capacity of the upper water. All compressed air is used for aeration and oxygenation of the upper water, thereby enhancing the aeration and oxygenation capacity of the upper water.

[0029] Preferably, the centerline of the third aeration hole 21 is parallel to the axis of the aerator. The center distance of the fourth aeration hole 22 is 1.5 to 2.0 times that of the center distance of the fifth aeration hole 31; the orifice diameter of the fourth aeration hole 22 is 150 to 200 μm. The gas velocity ejected from the fourth aeration hole 22 is 0.2 to 0.5 m / s lower than that ejected from the fifth aeration hole 31. The centerline of the fifth aeration hole 31 is parallel to the axis of the aerator, and the orifice diameters of the fifth aeration hole 31, the first aeration hole 11, and the third aeration hole 21 are equal; the center distances of the orifices of the fifth aeration hole 31, the first aeration hole 11, and the third aeration hole 21 are equal; the orifice diameter of the first aeration hole 11 is 80 to 120 μm.

[0030] In the preferred embodiment described above, the upper end of the aeration disc 2 is a horizontally positioned flat plate with a third aeration hole 21 on it. A fourth aeration hole 22 is located around the perimeter of the aeration disc 2. The centerline of the third aeration hole 21 is parallel to the axis of the aerator. The gas ejected from the third aeration hole 21 is parallel to each other, transferring oxygen to the upper water body to form a steam-water mixture. The orifice diameter of the third aeration hole 21 is the same as that of the first aeration hole, i.e., 80–120 μm. The gas velocity ejected from the second aeration hole 12 is 0.2–0.5 m / s lower than that ejected from the third aeration hole 21. The third aeration holes 21 are densely distributed in the annular region at the top of the aeration disc 2 (excluding the lower end of the first frustum). Parallel compressed air with a certain pressure and very small spacing is ejected at high speed from the third aeration hole 21 into the upper water body, generating very small bubbles that continuously mix with the upper water body to form a third steam-water mixture, continuously transferring oxygen to the water body during the process. The functions of the third aeration hole 21 are: firstly, the generated third air-water mixture moves vertically upwards, eliminating the waste of downward-moving air resources, thus fully contributing to the oxygenation of the upper water body and enhancing its dissolved oxygenation effect. This air-water mixture is located below and outside the second air-water mixture generated by the second aeration hole 12, and the spray direction of the second air-water mixture intersects the vertical axis at an angle α (e.g., ...). Figure 3As shown in the diagram, the injection speed of the third air-water mixture is greater than that of the second air-water mixture. Therefore, the third air-water mixture, vertically positioned in different directions around the circumference, is injected at high speed into the second air-water mixture. The two air-water mixtures collide, cut, and mix violently, making the water droplets and bubbles smaller and denser. Simultaneously, the collision of the two air-water mixtures continuously alters their movement path. This combined effect transfers more oxygen to the upper water body, continuously improving oxygen transfer efficiency. Secondly, the second air-water mixture injected at an angle from the upper aeration disc 1 of adjacent aerators undergoes further collision, cutting, and mixing, forming a new air-water mixture and continuously altering its movement path, further improving oxygen transfer efficiency. Thirdly, when the air ejected from the third aeration hole moves upward at high speed, a local vacuum is created below and around the upper aeration disc 1, which facilitates the upward movement of wastewater with higher sludge concentrations, thereby enhancing the sludge relay lifting effect.

[0031] The fourth aeration hole 22 is disposed on the circumferential wall of the second frustum. Preferably, the diameter of the fourth aeration hole 22 is 150-200 μm, and the center distance of the fourth aeration hole 22 (in both the circumferential and generatric directions) is 1.5-2.0 times that of the center distance of the fifth aeration hole 31. The velocity and intensity of the gas ejected outward and upward through the fourth aeration hole 22 are less than those of the gas ejected upward through the fifth aeration hole 31. The velocity of the gas ejected from the fourth aeration hole 22 is 0.2-0.5 m / s lower than that of the gas ejected from the fifth aeration hole 31. The fourth aeration hole 22 has the following functions: First, it generates gas that is ejected upward and outward at an angle above the lower aeration disc 3. On a generatrix along a certain circumferential direction, the velocity direction of the gas ejected at different heights is the same, i.e., parallel fluid. On any frustum surface concentric with the surface of the second frustum, the aeration effect is the same, thereby balancing the dissolved oxygen effect at different radii and directions. The compressed air jets, sprayed in parallel, are angled upwards and outwards from the fourth aeration hole 22 into the surrounding water, oxygenating the water above the lower aeration plate 3 and forming a fourth air-water mixture. Secondly, the angled outward spraying of compressed air increases the range of oxygen exchange with the water. Thirdly, the air mixture collides and cuts with the first, second, third, and fourth air-water mixtures sprayed from the aeration plates of other aerators, making the water droplets and bubbles smaller and denser, transferring more oxygen into the water and improving oxygen transfer efficiency. Fourthly, the air mixture collides and cuts with the fifth air-water mixture sprayed upwards from the lower aeration plate, making the water droplets and bubbles smaller and denser, thus improving oxygen transfer efficiency. Fifthly, the spray direction of the fourth air-water mixture intersects the vertical axis, with an angle β between it and the vertical axis, and β is less than α. Therefore, the second and fourth soda mixtures are not sprayed in parallel directions, forming an intersection, causing the two soda mixtures to mix and cut each other above, continuously transferring oxygen and enhancing the oxygen transfer effect above (the resultant force direction is upward and outward).

[0032] The upper end of the lower aeration disc 3 is a horizontally positioned plate with a fifth aeration hole 31. The centerline of the fifth aeration hole 31 is parallel to the axis of the aerator. The gas ejected from the fifth aeration hole 31 is parallel to each other, transferring oxygen to the upper water body to form a steam-water mixture. The orifice diameter of the fifth aeration hole 31 is the same as that of the first aeration hole, i.e., 80-120 μm. The fifth aeration holes 31 are densely distributed in the annular area at the top of the lower aeration disc 3 (the outer periphery of the lower diameter of the second frustum). Parallel compressed air with a certain pressure and very small intervals is ejected at high speed from the fifth aeration hole 31 into the upper water body, generating very small diameter bubbles. These bubbles continuously mix with the upper water body to form the fifth steam-water mixture, continuously transferring oxygen to the water body during the movement. The functions of the fifth aeration hole 31 are: firstly, the direction of the fifth steam-water mixture produced is vertically upward, located below and outside the fourth steam-water mixture produced by the fourth aeration hole 22; the spray direction of the fourth steam-water mixture intersects the vertical axis, and the angle between it and the vertical axis is β (e.g., ...). Figure 3 As shown in the diagram, the fifth soda-water mixture is sprayed at a higher speed than the fourth soda-water mixture. Therefore, the fifth soda-water mixture, vertically positioned in different directions around the circumference, is injected at high speed into the fourth soda-water mixture. The two soda-water mixtures collide, cut, and mix violently, making the water droplets and bubbles smaller and denser. Simultaneously, the two soda-water mixtures continuously change their movement paths. The combined effect of these two aspects transfers more oxygen to the water, continuously enhancing the oxygen transfer effect above (the resultant force is upward and outward), effectively improving oxygen transfer efficiency. Secondly, it collides, cuts, and mixes with the second and fourth soda-water mixtures, as well as the mixed soda-water mixtures, sprayed at an angle from other aerators, and continuously changes the movement path of the new soda-water mixtures, further improving oxygen transfer efficiency. Thirdly, the new soda-water mixture formed after mixing with the fourth soda-water mixture then merges with the mixture formed after mixing with the third and second soda-water mixtures above, further enhancing the oxygen transfer efficiency. Further oxygen transfer is achieved, further improving oxygen transfer efficiency: Fourthly, the spiral air-water mixture generated by the spiral disc 4 is repeatedly used to improve sludge activity and dilute the wastewater mixture, and then continues to be lifted upwards (the upward high-speed airflow forms a negative pressure on the circumference of the lower aeration disc 3, causing the diluted and less dense wastewater at the bottom to move upwards). The high-speed jet of gas continuously integrates into the wastewater with a higher sludge content and drives the wastewater upwards, causing the wastewater to continuously diffuse and dilute, thereby continuously transferring oxygen into the wastewater, allowing the sludge to absorb more oxygen, thus balancing the sludge activity in the height direction and enabling the process to operate efficiently.

[0033] In the above aeration process, the main aeration involves vertically upward-spraying gas forming the first, third, and fifth air-water mixtures with the water above. During this movement, oxygen continuously dissolves in the water, aerating and oxygenating the water above, thus increasing the oxygen transfer rate. The auxiliary aeration involves gas sprayed in circular directions with different radii forming the second and fourth air-water mixtures with the water, aerating and oxygenating the surrounding and upper water. Since auxiliary aeration has no downward component, there is no waste of air resources; all air is used for aeration and oxygenation of the upper and surrounding water, thereby enhancing the dissolved oxygen effect. The main and auxiliary aeration processes interact and interact, jointly strengthening the oxygen transfer force of the upper air-water mixtures (the resultant force is upward and outward).

[0034] like Figure 4 As shown, the spiral disk 4 is formed by an inner spiral surface, an outer spiral surface, and an end face. The top of the spiral disk 4 is open and connected to the bottom of the lower aeration disk 3. The bottom of the spiral disk 4 is open and connected to the air inlet pipe 5. The spiral disk 4 has a gradually contracting spiral cavity 42, and the small end of the spiral cavity 42 is the outlet end. At the junction of the inner and outer spiral surfaces, i.e., the small end of the spiral cavity 42, an eighth aeration hole 44 is provided, which is distributed along the height direction. Compressed air moves in a spiral motion in the spiral cavity 42. Preferably, both the inner and outer spiral surfaces are convex surfaces away from the axis. A sixth aeration hole 41 is provided on the outer spiral surface. The diameter of the sixth aeration hole 41 is 200-400 μm, and the center distance between the holes of the sixth aeration hole 41 is 5-8 times that of the center distance between the holes of the first aeration hole 11. The velocity of the gas ejected from the sixth aeration hole 41 is 0.4-0.8 m / s lower than that of the gas ejected from the fifth aeration hole. During operation, compressed air is injected from the sixth aeration hole 41 in a direction away from the axis, spraying and oxygenating the sludge at the bottom of the outer ring of the spiral disc 4, diluting the sludge at the bottom of the pool, preventing sludge from settling, reducing the density and causing the sewage to float, forming the sixth air-water mixture. The compressed air continuously impacts the sludge at the bottom of the pool, transferring oxygen into the sludge.

[0035] A seventh aeration hole 43 is provided on the inner spiral surface. The diameter of the seventh aeration hole 43 is 200-400 μm, and the center-to-center distance of the seventh aeration hole 43 is 5-8 times that of the center-to-center distance of the first aeration hole 11. The gas velocity ejected from the seventh aeration hole 43 is 0.4-0.8 m / s lower than that ejected from the fifth aeration hole. Compressed air is injected from the seventh aeration hole 43 in the axial direction, spraying and oxygenating the sludge at the bottom of the pool near the axis, diluting the sludge at the bottom of the pool, preventing sludge from settling, reducing its density and causing the wastewater to float, forming the seventh air-water mixture. The air continuously impacts the sludge at the bottom of the pool, transferring oxygen to the sludge. Because the sludge concentration at the bottom of the pool is higher, this part of the sludge requires more oxygen. The sixth and seventh air-water mixtures effectively ensure the activity of the sludge at the bottom of the pool.

[0036] An eighth aeration hole 44 is provided at the outlet end of the spiral cavity 42. The diameter of the eighth aeration hole 44 is 80 μm, and the center-to-center distance between the holes of the eighth aeration hole is equal to that of the first aeration hole. The eighth aeration hole 44 generates a spiral gas with a very high velocity. The velocity of the gas ejected from the eighth aeration hole 44 is greater than or equal to the velocity of the gas ejected from the first aeration hole.

[0037] Preferred, such as Figure 4 and Figure 5 As shown, the device in this embodiment also includes a swirling fluid 45, which is disposed inside the outer spiral surface extending outside the spiral cavity 42 and is spiral in shape. The eighth aeration hole 44 is opposite to the surface of the swirling fluid 45. Preferably, the swirling fluid 45 extends out of the side of the lower aeration disc 3.

[0038] The horizontal projection arc length of the swirling fluid 45 is greater than 40mm to ensure that the eighth air-water mixture sprayed from the eighth aeration hole 44 continues to be sprayed in a spiral manner along the spiral surface of the swirling fluid 45, thus forming a spiral air-water mixture. The function of the swirling fluid 45 is to gradually lift the eighth air-water mixture, which is moving in a spiral motion, upward, so that the diluted wastewater moves upward.

[0039] Spiral gas is ejected at high speed from the eighth aeration hole 44 in spiral disc 4, forming a spiral eighth air-water mixture. This eighth air-water mixture transfers oxygen into the water and causes the diluted and floating wastewater at the bottom of the tank to move in a spiral motion. On one hand, the spirally moving air-water mixture collides and mixes with the inwardly injected seventh air-water mixture formed by the seventh aeration hole on the inner spiral surface, further transferring oxygen. Simultaneously, the interaction of air-water mixtures in different motion states continuously lifts the diluted wastewater at the bottom of the tank. On the other hand, the spirally moving eighth air-water mixture collides and mixes with the spiral eighth air-water mixture formed by the spiral discs of adjacent aerators, as well as the outwardly injected sixth air-water mixture formed by the sixth aeration hole on the outer spiral surface of adjacent aerators, continuously lifting the diluted wastewater at the bottom of the tank. When the wastewater rises to the height of the lower aeration disc 3, it is further diluted and continuously lifted by the vertically upward fifth air-water mixture and the inclined upward fourth air-water mixture, moving outward and upward. Subsequently, the third air-water mixture formed by the high-speed injection of the third aeration hole 21 on the middle aeration plate 2 and the second air-water mixture formed by the high-speed injection of the second aeration hole 12 on the upper aeration plate 1 are further diluted and enhanced. Driven by the second air-water mixture which is parallel in the height direction, it continues to move outward and upward, continuously diluting the sludge and transferring oxygen, further improving the oxygen transfer efficiency and transferring more oxygen into the water.

[0040] In the above embodiments, the function of the spiral disk 4 is as follows: (1) Compressed air is sprayed from the sixth aeration hole 41 in a direction away from the axis to form the sixth air-water mixture, which sprays and oxygenates the sludge at the bottom of the pool on the outer ring of the spiral disk, diluting the sludge at the bottom of the pool and preventing sedimentation. The high-speed air continuously impacts the sludge at the bottom of the pool, transferring oxygen to the sludge and thus improving the activity of the sludge. (2) Compressed air is sprayed from the seventh aeration hole 43 in a direction towards the axis to form the seventh air-water mixture, which sprays and oxygenates the sludge at the bottom of the pool near the axis, diluting the sludge at the bottom of the pool and preventing sedimentation. The high-speed air continuously impacts the sludge at the bottom of the pool, transferring oxygen to the sludge and thus improving the activity of the sludge. (3) Spiral gas is sprayed out at high speed from the eighth aeration hole 44 to form a spiral eighth air-water mixture, which transfers oxygen to the water and drives the continuously diluted sewage at the bottom of the pool to make spiral movements, increasing the movement path of the air-water mixture. The spiral-moving eighth air-water mixture collides, cuts, and mixes with the inwardly sprayed seventh air-water mixture, transferring more oxygen to the sludge and improving sludge activity. When the eighth air-water mixture collides with the sixth air-water mixture from other aerators in the surrounding area, the two streams of air-water mixture are squeezed together, causing the mixture at the bottom of the tank to rise due to the constraint of the bottom. The swirling fluid 45 continuously lifts the spiral-moving eighth air-water mixture upward, causing the diluted wastewater to move upward.

[0041] The spiral-moving eighth air-water mixture collides, cuts, and mixes with the sixth air-water mixture sprayed outward from the spiral disc of the adjacent aerator, causing more oxygen to be transferred to the sludge and improving sludge activity. When the eighth air-water mixture collides with the sixth and eighth air-water mixtures from the adjacent aerator, the three air-water mixtures are squeezed together. Due to the constraint of the bottom of the tank, the mixture at the bottom of the tank is lifted and rises. The swirling fluid 45 gradually lifts the spiral-moving eighth air-water mixture upward, causing the diluted wastewater to move upward. When the wastewater rises to the height of the lower aeration disc 3, it is further diluted and continuously lifted by the fifth air-water mixture formed vertically upward from the fifth aeration hole (creating negative pressure, causing the lower wastewater to move upward) and the fourth air-water mixture sprayed obliquely upward and outward from the fourth aeration hole, further improving the sludge activity. Subsequently, driven by the negative pressure generated by the third air-water mixture formed by the third aeration hole on the middle aeration plate and the second air-water mixture formed by the second aeration hole on the upper aeration plate, the sludge continuously moves upward and outward, continuously diluting the sludge and transferring oxygen, further improving the oxygen transfer efficiency, transferring more oxygen to the water, and once again enhancing the activity of the sludge.

[0042] Preferably, there are N aerators, and the N aerators are connected to the air supply pipeline through the air inlet pipe 5; N is an integer greater than 1. The aerators are arranged in an array. Setting up multiple aerators allows the air-water mixture between adjacent aerators to collide, cut, and mix with each other, continuously diluting the sludge and transferring oxygen, thereby improving the activity of the sludge.

[0043] A method for treating medical wastewater using the equipment described in the above embodiments or preferred examples includes the following steps:

[0044] Step 10: Start the blower and fill the aerator cavity with compressed air.

[0045] When the blower is started, compressed air enters the corresponding aerator cavity through the horizontal pipes arranged in the grid at the bottom of the pool and through their respective air inlet pipes 5. The compressed air is then sprayed upwards and outwards at high speed from the aeration holes of each aeration disc.

[0046] Step 20: The aerator is equipped with aeration holes. Compressed air passes through the aeration holes and is sprayed to the outside to form a mixture of air and water, so that oxygen is continuously dissolved in the water.

[0047] Step 30: Use the steam-water mixture to flow the sewage at the bottom of the pool upwards to dilute the sewage.

[0048] Preferably, step 20 includes: compressed air being injected at high speed from the first aeration hole 11 of the upper aeration plate 1 into the upper water body, generating bubbles, which mix with the water body above to form a first air-water mixture; compressed air being injected obliquely upward and outward from the second aeration hole 12 of the upper aeration plate 1 into the surrounding water body to oxygenate the water body above the middle aeration plate 2, forming a second air-water mixture; the second air-water mixture is in an oblique state.

[0049] Compressed air with a certain pressure and small spacing is injected at high speed from the first aeration hole 11 of the upper aeration plate 1 into the upper water body, generating bubbles that mix with the water above to form a first air-water mixture. Along the circumference of the upper aeration plate 1, parallel jets of air are injected obliquely upwards and outwards from the second aeration hole 12 into the surrounding water body, oxygenating the water above the middle aeration plate 2 and forming a second air-water mixture. Because the compressed air is injected obliquely outwards, the range of oxygen exchange with the water is increased.

[0050] Preferably, step 20 further includes: compressed air being injected at high speed from the third aeration hole 21 of the middle aeration plate 2 into the upper water body, generating bubbles, which mix with the upper water body to form a third air-water mixture; the third air-water mixture is in a vertical state; the third air-water mixture and the second air-water mixture collide, cut and mix; compressed air is injected obliquely upward and outward from the fourth aeration hole 22 of the middle aeration plate 2 into the surrounding water body to oxygenate the water body above the lower aeration plate 3, forming a fourth air-water mixture; the fourth air-water mixture is in an oblique state.

[0051] High-pressure, parallel jets of compressed air, spaced very closely together, are injected at high speed from the third aeration hole 21 on the middle aeration plate 2 into the upper water body, generating bubbles that continuously mix with the water above, forming a third air-water mixture. The third air-water mixture, vertically positioned in different directions around the circumference, is injected at high speed into the second air-water mixture, which is injected upwards and outwards at an angle. The two air-water mixtures collide, cut, and mix violently, making the water droplets and bubbles even smaller and denser. Simultaneously, the movement path of the air-water mixture is constantly altered. The combined effect of these two aspects transfers more oxygen to the upper water body, continuously improving oxygen transfer efficiency. Parallel jets of compressed air are injected obliquely upwards and outwards from the fourth aeration hole 22 into the surrounding water body, oxygenating the water above the lower aeration plate 3, forming a fourth air-water mixture. Because the air is injected obliquely outwards, the range of oxygen exchange with the water is increased.

[0052] Preferably, step 20 further includes: compressed air is injected at high speed from the fifth aeration hole 31 on the lower aeration disc 3 into the upper water body, generating bubbles, which continuously mix with the upper water body to form a fifth air-water mixture; the fifth air-water mixture is in a vertical state; the fifth air-water mixture and the fourth air-water mixture collide, cut, and mix; the air-water mixture formed by the mixing of the fifth air-water mixture and the fourth air-water mixture cuts and mixes with the air-water mixture formed by the mixing of the third air-water mixture and the second air-water mixture.

[0053] High-pressure, parallel streams of compressed air, spaced very closely together, are injected at high speed from the fifth aeration hole 31 on the lower aeration disc 3 into the upper water body, generating bubbles that continuously mix with the water above, forming a fifth air-water mixture. This fifth air-water mixture is then injected at high speed into the inclined fourth air-water mixture, where the two streams collide, cut, and mix violently, making the water droplets and bubbles even smaller and denser. Simultaneously, the movement path of the air-water mixture is continuously altered. The combined effect of these two aspects transfers more oxygen into the water, continuously enhancing the oxygen transfer effect above. Furthermore, the new air-water mixture formed after mixing with the fourth air-water mixture then mixes with the third and second air-water mixtures above, forming another new mixture that further integrates and transfers oxygen, further improving the oxygen transfer efficiency.

[0054] Preferably, step 20 further includes: compressed air is injected from the sixth aeration hole 41 in a direction away from the axis to form a sixth air-water mixture, which is used to spray and oxygenate the sludge at the bottom of the outer ring of the spiral disc, thereby diluting the sludge at the bottom of the pool.

[0055] Compressed air is injected from the sixth aeration hole 41 in a direction away from the axis, forming the sixth air-water mixture. This mixture sprays and oxygenates the sludge at the bottom of the outer ring of the spiral disc, diluting the sludge and preventing sedimentation, thus reducing its density and causing the wastewater to float. The continuous air impact on the sludge at the bottom transfers oxygen into it.

[0056] Preferably, step 20 further includes: compressed air is injected from the seventh aeration hole 43 in the axial direction to form a seventh air-water mixture, which is used to spray and oxygenate the sludge at the bottom of the inner ring of the spiral disc, thereby diluting the sludge at the bottom of the pool.

[0057] Compressed air is injected from the seventh aeration hole 43 towards the axis of the spiral disc 4, forming a seventh air-water mixture. This mixture sprays and oxygenates the sludge at the bottom of the inner ring of the spiral disc 4, diluting the sludge and preventing sedimentation. The reduced density causes the wastewater to float. The continuous air impact on the sludge at the bottom transfers oxygen to it, thereby increasing its activity.

[0058] Preferably, step 20 further includes: compressed gas being ejected at high speed from the eighth aeration hole 44 to form a spiral-shaped, gradually upward-moving eighth air-water mixture, transferring oxygen to the water and causing the diluted wastewater at the bottom of the pool to move upward in a spiral motion, increasing the movement path of the air-water mixture; the eighth air-water mixture colliding, cutting, and mixing with the seventh air-water mixture; the eighth air-water mixture, the seventh air-water mixture, and the mixture after the eighth air-water mixture and the seventh air-water mixture collide with each other and squeeze each other, causing the mixture at the bottom of the pool to be lifted and rise; the swirling fluid 45 gradually lifts the spiral-moving eighth air-water mixture upward, causing the diluted wastewater to move upward.

[0059] Spiral gas is ejected from the eighth aeration hole 44, forming a spiral-shaped, gradually upward-rising eighth air-water mixture. This transfers oxygen into the water and drives the diluted wastewater at the bottom of the tank to move in a spiral motion, increasing the movement path of the air-water mixture. The spiral-moving eighth air-water mixture collides, cuts, and mixes with the inwardly injected seventh air-water mixture, transferring more oxygen to the sludge and improving sludge activity. When the eighth and seventh air-water mixtures collide, they compress against each other, causing the mixture at the bottom of the tank to rise due to the confinement of the tank bottom. The swirling flow 45 gradually lifts the spiral-moving eighth air-water mixture upward, causing the diluted wastewater to move upward.

[0060] Preferably, step 20 further includes: when the wastewater moves up to the height of the lower aeration disc 3, it is successively diluted and lifted by the fifth, fourth, third, and second air-water mixtures that move upward at high speed.

[0061] As the fifth air-water mixture moves upward, it creates negative pressure around the lower aeration plate 3. When the wastewater moves up to the area around the lower aeration plate 3, it is lifted upward and further diluted and continuously lifted by the upward-sloping fourth air-water mixture sprayed from the fourth aeration hole. Furthermore, in the vertical direction, it continues to move outward and upward under the influence of the fourth air-water mixture. Subsequently, as the third air-water mixture moves upward, it creates negative pressure around the middle aeration plate 2. When the wastewater moves up to the area around the middle aeration plate 2, it is lifted upward and further diluted and lifted by the second air-water mixture sprayed from the second aeration hole on the upper aeration plate 1. Furthermore, in the vertical direction, it continues to move outward and upward under the influence of the parallel second air-water mixture, continuously diluting the sludge and transferring oxygen, further improving oxygen transfer efficiency and transferring more oxygen into the water.

[0062] Preferably, step 20 further includes: the second, fourth, sixth, seventh, and eighth steam-water mixtures in one aerator collide, cut, and mix with the first, second, third, fourth, fifth, sixth, seventh, and eighth steam-water mixtures in adjacent aerators, as well as the new mixtures formed by their mutual mixing; the first, third, and fifth steam-water mixtures in one aerator collide, cut, and mix with the second, fourth, sixth, seventh, and eighth steam-water mixtures in adjacent aerators, as well as the new mixtures formed by their mutual mixing.

[0063] The second air-water mixture in one aerator collides and cuts with the first air-water mixture and the second air-water mixture sprayed from the upper aeration disc of other aerators around it, making the water droplets and bubbles smaller and denser, transferring more oxygen into the water, thereby improving the oxygen transfer efficiency.

[0064] The third air-water mixture in one aerator collides, cuts, and mixes with the second air-water mixture sprayed at an angle from other aerators around it, forming a new air-water mixture. This new air-water mixture continuously changes its movement path, further improving oxygen transfer efficiency.

[0065] The fourth air-water mixture in one aerator collides and cuts with the first, second, third, and fourth air-water mixtures sprayed from the aeration discs of other aerators around it, making the water droplets and bubbles smaller and denser, transferring more oxygen into the water, thus improving the oxygen transfer efficiency.

[0066] The fifth air-water mixture in one aerator collides, cuts, and mixes with the second and fourth air-water mixtures sprayed obliquely from other aerators around it, and continuously changes the movement path of the new air-water mixture, further improving the oxygen transfer efficiency.

[0067] In one aerator, the spirally moving eighth air-water mixture collides, cuts, and mixes with the sixth air-water mixture sprayed outwards from the spiral discs of adjacent aerators, as well as the spirally moving eighth air-water mixture, resulting in the transfer of more oxygen to the sludge and improving sludge activity. When the eighth air-water mixture collides with the sixth and eighth air-water mixtures from adjacent aerators, the three air-water mixtures are squeezed against each other. Due to the constraint of the pool bottom, the mixture at the bottom of the pool is lifted and rises.

[0068] In the aeration process described above, the first, third, and fifth air-water mixtures formed by the vertically upward-sprayed gas and the water above constitute the primary aeration. During their movement, oxygen continuously dissolves in the water, increasing the oxygen transfer rate. Meanwhile, the second, fourth, sixth, seventh, and eighth air-water mixtures formed by the gas sprayed in different circumferential directions constitute auxiliary aeration. Since auxiliary aeration has no downward component, there is no waste of air resources; all air is used for aeration and oxygenation of the upper water body, thereby enhancing the dissolved oxygen effect. The primary and auxiliary aeration processes interact and interact, jointly strengthening the oxygen transfer force of the upper air-water mixtures (the resultant force is upward and outward).

[0069] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the specific embodiments described above. The specific embodiments and descriptions in the specification are merely for further illustrating the principles of the invention. The basic principles, main features, and advantages of the present invention have been shown and described above without departing from the spirit and scope of the invention. Those skilled in the art should understand that various changes and modifications will be made, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. An integrated medical wastewater treatment device, characterized in that, The device includes an aerator, which includes an upper aeration disc (1), a middle aeration disc (2), a lower aeration disc (3), a spiral disc (4), and an air inlet pipe (5) that are connected and communicate with each other from top to bottom. The top surface of the upper aeration disc (1) is provided with a first aeration hole (11), and the circumferential side surface of the upper aeration disc (1) is provided with a second aeration hole (12); the top surface of the middle aeration disc (2) is provided with a third aeration hole (21), and the circumferential side surface of the middle aeration disc (2) is provided with a fourth aeration hole (22); the top surface of the lower aeration disc (3) is provided with a fifth aeration hole (31); the spiral disc (4) is formed by an inner spiral surface, an outer spiral surface and an end face, the outer spiral surface is provided with a sixth aeration hole (41), the inner spiral surface is provided with a seventh aeration hole (43), and the connection between the inner spiral surface and the outer spiral surface is provided with an eighth aeration hole (44), and the eighth aeration hole (44) is distributed along the height direction; The upper aeration disc (1) is a hollow first frustum, with the small end of the first frustum located above the large end; The aeration disc (2) is a hollow second frustum, with the small end of the second frustum located above the large end; the upper diameter of the second frustum is greater than the lower diameter of the first frustum. The lower aeration disc (3) is a hollow cylinder, and the diameter of the lower aeration disc (3) is larger than the diameter of the lower end of the middle aeration disc (2). The spiral disk (4) is a hollow spiral cylinder; It also includes a swirling fluid (45), which extends inside the outer spiral surface and is spiral in shape; the eighth aeration hole (44) is opposite to the surface of the swirling fluid (45); the swirling fluid (45) extends out of the side of the lower aeration disc (3).

2. The device according to claim 1, characterized in that, The taper of the second frustum is greater than that of the first frustum.

3. The device according to claim 1, characterized in that, The top of the upper aeration disc (1) is a flat surface, and the center line of the first aeration hole (11) is parallel to the axis of the aerator; or, the top of the upper aeration disc (1) is an upward convex arc surface, and the center line of the first aeration hole (11) intersects with the axis of the aerator.

4. The device according to claim 1, characterized in that, The diameter of the second aeration hole (12) is larger than that of the first aeration hole (11), and the center distance of the second aeration hole (12) is 1.5 to 2.0 times that of the center distance of the first aeration hole (11); the diameter of the second aeration hole (12) is 150 to 200 μm.

5. The device according to claim 1, characterized in that, The centerline of the third aeration hole (21) is parallel to the axis of the aerator; The center distance of the fourth aeration hole (22) is 1.5 to 2.0 times that of the center distance of the fifth aeration hole (31); the diameter of the fourth aeration hole (22) is 150 to 200 μm; The centerline of the fifth aeration hole (31) is parallel to the axis of the aerator, and the diameter of the hole of the fifth aeration hole (31), the diameter of the hole of the first aeration hole (11), and the diameter of the hole of the third aeration hole (21) are equal. The center distance between the holes of the fifth aeration hole (31), the center distance between the holes of the first aeration hole (11), and the center distance between the holes of the third aeration hole (21) are equal; the diameter of the hole of the first aeration hole (11) is 80-120 μm.

6. The device according to claim 1, characterized in that, There are N aerators, and the N aerators are connected to the air supply pipeline through the air inlet pipe (5); N is an integer greater than 1.

7. The device according to claim 6, characterized in that, The aerators are arranged in an array.

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