Integrated medical wastewater treatment equipment

Abstract

The invention discloses integrated medical wastewater treatment equipment which comprises an aerator, and the aerator comprises an upper aeration disc, a middle aeration disc, a lower aeration disc, a spiral disc and an air inlet pipe which are sequentially connected and communicated from top to bottom; first aeration holes are formed in the top surface of the upper aeration disc, and second aeration holes are formed in the circumferential side surface of the upper aeration disc; a third aeration hole is formed in the top surface of the middle aeration disc, and a fourth aeration hole is formed in the circumferential side surface of the middle aeration disc; a fifth aeration hole is formed in the top surface of the lower aeration disc; the spiral disc is defined by an inner spiral surface, an outer spiral surface and an end surface, sixth aeration holes are formed in the outer spiral surface, seventh aeration holes are formed in the inner spiral surface, eighth aeration holes are formed in the joint of the inner spiral surface and the outer spiral surface, and the eighth aeration holes are distributed in the height direction. According to the equipment, bubbles generated by the aerators in the aerobic tank become finer, more balanced in distribution and larger in area.

Description

Technical Field

[0001] The present invention belongs to the field of sewage treatment, and in particular relates to an integrated medical wastewater treatment device. Background Art

[0002] Integrated medical wastewater treatment equipment is widely used to treat medical wastewater containing large amounts of toxic and hazardous substances, chemical pollutants, radioactive pollutants, and other pathogenic microorganisms. The aerobic tank is a key process in integrated medical wastewater treatment equipment. Aerators arranged in a grid pattern at the bottom of the tank oxygenate the water, allowing oxygen to dissolve in the medical wastewater and fully contact the biofilm. Through sufficient adsorption by the biofilm, organic matter is decomposed into inorganic matter, effectively removing pollutants. However, existing aeration and oxygenation systems have the following shortcomings: First, the gas flow direction is vertically upward or nearly vertically upward, resulting in poor oxygen dissolution between adjacent aerators and uneven sludge activity. The aerators produce vertically upward air jets, which have a limited amount of dissolved oxygen. Second, the sewage at the bottom of the tank has poor fluidity, and sludge often settles at the bottom. This prevents the activated sludge microorganisms from receiving sufficient oxygen, resulting in 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 equipment, 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] In order to solve the above technical problems, an embodiment of the present invention provides an integrated medical wastewater treatment equipment, which includes an aerator, and the aerator includes an upper aeration plate, a middle aeration plate, a lower aeration plate, a spiral plate and an air inlet pipe that are connected in sequence from top to bottom and communicate with each other; the top surface of the upper aeration plate is provided with a first aeration hole, and the circumferential side surface of the upper aeration plate is provided with a second aeration hole; the top surface of the middle aeration plate is provided with a third aeration hole, and the circumferential side surface of the middle aeration plate is provided with a fourth aeration hole; the top surface of the lower aeration plate is provided with a fifth aeration hole; the spiral plate is surrounded by an inner spiral surface, an outer spiral surface and an end surface, the outer spiral surface is provided with a sixth aeration hole, the inner spiral surface is provided with a seventh aeration hole, and the connection between the inner spiral surface and the outer spiral surface is provided with an eighth aeration hole, and the eighth aeration hole is distributed along the height direction.

[0005] As a preferred example, the upper aeration plate is a hollow first frustum, and the small end of the first frustum is located above the large end; the middle aeration plate is a hollow second frustum, and the small end of the second frustum is located above the large end; the upper end diameter of the second frustum is larger than the lower end diameter of the first frustum; the lower aeration plate is a hollow cylinder, and the diameter of the lower aeration plate is larger than the lower end diameter of the middle aeration plate; the spiral plate 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 example, the top of the upper aeration plate is a plane, and the center line of the first aeration hole is parallel to the axis of the aerator; or the top of the upper aeration plate is an upper convex arc surface, and the center line of the first aeration hole intersects the axis of the aerator.

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

[0009] As a preferred example, the center line 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 the center distance of the fifth aeration hole; the hole diameter of the fourth aeration hole is 150 to 200 μm; the center line of the fifth aeration hole is parallel to the axis of the aerator, the hole diameter of the fifth aeration hole, the hole diameter of the first aeration hole, and the hole diameter of the third aeration hole are equal; the hole center distance of the fifth aeration hole, the hole center distance of the first aeration hole, and the hole center distance of the third aeration hole are equal; and the hole diameter of the first aeration hole 11 is 80 to 120 μm.

[0010] As a preferred example, the device further comprises a cyclone body, the cyclone body extending inside the outer spiral surface and being spiral-shaped; the eighth aeration hole is opposite to the surface of the cyclone body; As a preferred example, the cyclone body extends out of the side of the lower aeration plate.

[0011] As a preferred example, there are N aerators, which are connected to the gas pipeline via an air inlet pipe; N is an integer greater than 1.

[0012] As a preferred example, the aerators are arranged in an array.

[0013] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: in an integrated medical wastewater treatment equipment according to an embodiment of the present invention, after air is ejected from the aerator of the aerobic tank, it is sprayed in all directions at different heights, multiple levels, and multiple directions, and cuts and collides with each other, 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 soda-water mixture sprayed obliquely 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, so that the activated sludge is fully dissolved in the water, and the sludge activity in the height direction is balanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 1 is a schematic structural diagram of an aerator in an embodiment of the present invention; Figure 2 Schematic diagram of the positions of aeration holes on an aerator in an embodiment of the present invention; Figure 3 Schematic diagram of the inclined injection angle of the aerator in an embodiment of the present invention; Figure 4 Schematic diagram of the structure of the spiral disk in an embodiment of the present invention; Figure 5 Schematic diagram of the positions of the vortex body and the outer helical surface in an embodiment of the present invention.

[0015] In the figure, there are: upper aeration plate 1, first aeration hole 11, second aeration hole 12, middle aeration plate 2, third aeration hole 21, fourth aeration hole 22, lower aeration plate 3, fifth aeration hole 31, spiral plate 4, sixth aeration hole 41, spiral cavity 42, seventh aeration hole 43, eighth aeration hole 44, cyclone body 45, and air inlet pipe 5. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0017] like Figure 1 and Figure 2 As shown, an integrated medical wastewater treatment equipment according to an embodiment of the present invention includes an aerator. The aerator includes an upper aeration plate 1, a middle aeration plate 2, a lower aeration plate 3, a spiral plate 4 and an air inlet pipe 5, which are connected in sequence from top to bottom and communicate with each other. The top surface of the upper aeration plate 1 is provided with a first aeration hole 11, and the circumferential side of the upper aeration plate 1 is provided with a second aeration hole 12. The top surface of the middle aeration plate 2 is provided with a third aeration hole 21, and the circumferential side of the middle aeration plate 2 is provided with a fourth aeration hole 22. The top surface of the lower aeration plate 3 is provided with a fifth aeration hole 31. The spiral plate 4 is surrounded by an inner spiral surface, an outer spiral surface and an end surface. 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. Preferably, the aerator is made of ceramic material.

[0018] In the above embodiment, the bottom end of the upper aeration plate 1 is connected to the top end of the middle aeration plate 2, the bottom end of the middle aeration plate 2 is connected to the top end of the lower aeration plate 3, the spiral plate 4 is disposed at the bottom end of the lower aeration plate 3, and the top end of the air inlet pipe 5 is connected to the bottom end of the spiral plate 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 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. This airflow mixes with external water to form a soda-water mixture. The multiple aeration holes create multiple streams of aerated water mixture, making the bubbles smaller and denser, increasing the aeration range and enhancing dissolved oxygen. Simultaneously, the multiple streams of aerated water mixture intersect and intermingle, further increasing dissolved oxygen efficiency. This structure enhances aeration at the bottom of the tank, fully dissolving the activated sludge in the water and balancing sludge activity across the height.

[0019] Preferably, Figure 2 As shown, the upper aeration plate 1 is a hollow first frustum, and the small end of the first frustum is located above the large end. From top to bottom, the cross-sectional area of the upper aeration plate 1 gradually increases. The middle aeration plate 2 is a hollow second frustum, and the small end of the second frustum is located above the large end. From top to bottom, the cross-sectional area of the middle aeration plate 2 gradually increases. The upper end diameter of the second frustum is larger than the lower end diameter of the first frustum. Preferably, the upper end diameter of the second frustum is 20 to 100 mm larger than the lower end diameter of the first frustum. The lower aeration plate 3 is a hollow cylinder, and the diameter of the lower aeration plate 3 is larger than the lower end diameter of the middle aeration plate 2. Preferably, the diameter of the lower aeration plate 3 is 20 to 100 mm larger than the lower end diameter of the middle aeration plate 2. The spiral plate 4 is a hollow spiral cylinder.

[0020] The upper aeration plate 1 is closed at the top and open at the bottom. The middle aeration plate 2 is open at both the top and bottom. The lower aeration plate 3 is open at both the top and bottom. The lower end of the upper aeration plate 1 mates with the upper end of the middle aeration plate 2, the lower end of the middle aeration plate mates with the upper end of the lower aeration plate 3, and the upper end of the spiral plate 4 mates with the lower end of the lower aeration plate 3. The upper end of the air inlet pipe 5 is connected to the lower end of the spiral plate 4. The inner cavities of the upper aeration plate 1, middle aeration plate 2, lower aeration plate 3, and spiral plate 4 together form a semi-enclosed space with an open bottom end (connected to the air inlet pipe).

[0021] like Figure 3As shown, the taper of the second frustum is greater than that of the first frustum. The taper of the second frustum is unequal to that of the first frustum, and the taper of the second frustum is greater than that of the first frustum. This allows the mixed liquid formed by the interaction of the second and third soda-water mixtures, and the mixed liquid formed by the interaction of the fourth and fifth soda-water mixtures, to collide and mix again, further increasing the dissolved oxygen rate.

[0022] Preferably, the top of the upper aeration plate 1 is flat, and the centerline of the first aeration hole 11 is parallel to the axis of the aerator; alternatively, the top of the upper aeration plate 1 is an upwardly convex curved 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, forming a first soda-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 in all directions, forming a first soda-water mixture, and the extension line of the first soda-water mixture passes through the center of the curved top plate of the upper aeration plate 1.

[0023] Preferably, the second aeration holes 12 have a larger diameter than the first aeration holes 11, and the center-to-center distance (both circumferential and generatrix directions) of the second aeration holes 12 is 1.5 to 2.0 times that of the first aeration holes 11. The diameter of the second aeration holes 12 is 150 to 200 μm. The velocity of the gas ejected from the second aeration holes 12 is 0.2 to 0.5 m / s less than the velocity of the gas ejected from the first aeration holes 11. Preferably, the diameter of the first aeration holes 11 is 80 to 120 μm. The first aeration holes 11 are densely distributed on the top of the upper aeration plate 1. High-pressure, closely spaced, parallel or radial compressed air is ejected from the first aeration holes 11 at high speed into the water above, generating small bubbles that mix with the water above to form a first soda-water mixture. During this process, oxygen is continuously transferred to the water. The velocity and intensity of the gas ejected outward and upward through the second aeration holes 12 are both lower than those of the gas ejected upward through the first aeration holes 11. The second aeration holes 12 have the following functions: First, they produce an upward and outward oblique jet of gas along the circumference of the upper aeration plate 1. On a certain circumferential line, the gas ejected at different heights has the same velocity and direction, i.e., parallel flow. This results in the same aeration effect on any conical surface concentric with the first conical surface, thereby balancing the dissolved oxygen effect at different radii and directions. Each parallel jet of compressed air is ejected obliquely upward and outward from the second aeration holes 12 into the surrounding water, oxygenating the water above the middle aeration plate to form a second soda-water mixture. Secondly, because the compressed air is injected obliquely outward from the circumference, the range of oxygen exchange with the water is increased. Thirdly, the compressed air collides and cuts with the first and second soda-water mixtures ejected from the surrounding upper aeration plates, making the water droplets and bubbles smaller and denser, transferring more oxygen into the water and improving oxygen transfer efficiency. Fourthly, the compressed air collides and cuts with the third soda-water mixture ejected upward from the middle aeration plate, further making the water droplets and bubbles smaller and denser. Furthermore, because both compressed air streams flow upward or obliquely upward, there is no waste of downward aeration resources, thus preventing a weakening of the aeration and oxygenation capacity of the upper water. All compressed air is used to aerate and oxygenate the upper water, thereby enhancing the aeration and oxygenation capacity of the upper water.

[0024] Preferably, the centerline of the third aeration hole 21 is parallel to the axis of the aerator. The center-to-center distance of the fourth aeration hole 22 is 1.5 to 2.0 times the center-to-center distance of the fifth aeration hole 31. The aperture diameter of the fourth aeration hole 22 is 150 to 200 μm. The velocity of the gas ejected from the fourth aeration hole 22 is 0.2 to 0.5 m / s less than the velocity of the gas ejected from the fifth aeration hole 31. The centerline of the fifth aeration hole 31 is parallel to the axis of the aerator. The aperture diameters of the fifth aeration hole 31, the first aeration hole 11, and the third aeration hole 21 are equal. The center-to-center distances of the fifth aeration hole 31, the first aeration hole 11, and the third aeration hole 21 are equal. The aperture diameter of the first aeration hole 11 is 80 to 120 μm.

[0025] In the preferred embodiment described above, the upper end of the middle aeration plate 2 is a horizontally disposed flat plate with third aeration holes 21 formed in the plate. Fourth aeration holes 22 are arranged around the perimeter of the middle aeration plate 2. The centerlines of the third aeration holes 21 are parallel to the axis of the aerator. The gas ejected from the third aeration holes 21 is parallel to each other, transferring oxygen into the upper water column, forming a soda-water mixture. The aperture diameter of the third aeration holes 21 is the same as that of the first aeration holes, i.e., 80-120 μm. The velocity of the gas ejected from the second aeration holes 12 is 0.2-0.5 m / s less than that of the gas ejected from the third aeration holes 21. The third aeration holes 21 are densely distributed in the annular region at the top of the middle aeration plate 2 (beyond the lower end of the first frustum). High-pressure, closely spaced, parallel compressed air is ejected from the third aeration holes 21 at high speed into the upper water column, generating small bubbles that continuously mix with the upper water column, forming a third soda-water mixture. During this process, oxygen is continuously transferred into the water column. The third aeration holes 21 have the following functions: First, the third steam-water mixture is moved vertically upward, without wasting air moving downward, thus oxygenating the upper water body and enhancing the dissolved oxygen effect in the upper water body. The steam-water mixture is located below the outer portion of the second steam-water mixture produced by the second aeration holes 12, and the injection direction of the second steam-water mixture intersects the vertical axis, with an angle α (such as Figure 3As shown, the injection velocity of the third soda-water mixture is greater than that of the second soda-water mixture. Consequently, the third soda-water mixture, vertically positioned in different circumferential directions, is injected at high speed into the second soda-water mixture. The two streams collide, cut, and mix intensely, resulting in smaller and denser droplets and bubbles. Simultaneously, the collision of the two streams continuously changes the flow path of the soda-water mixture. These two combined effects transfer more oxygen to the upper water column, continuously transferring oxygen to the upper water column and effectively improving oxygen transfer efficiency. Secondly, the second soda-water mixture injected obliquely from the upper aeration discs 1 of other adjacent aerators further collides, cuts, and mixes, forming a new soda-water mixture. This new flow path also continuously changes, further improving oxygen transfer efficiency. Thirdly, the air injected upward at high speed from the third aeration holes creates a local vacuum beneath the outer periphery of the upper aeration disc 1, facilitating the upward movement of sewage with higher sludge concentrations below, thereby enhancing the relay lifting effect of the sludge.

[0026] The fourth aeration holes 22 are located on the circumferential wall of the second frustum. Preferably, the diameter of the fourth aeration holes 22 is 150-200 μm, and the center-to-center distance (both circumferentially and along the generatrix) of the fourth aeration holes 22 is 1.5-2.0 times the center-to-center distance of the fifth aeration holes 31. The velocity and intensity of the gas ejected upward through the fourth aeration holes 22 are both lower than those of the fifth aeration holes 31. The velocity of the gas ejected from the fourth aeration holes 22 is 0.2-0.5 m / s lower than that of the gas ejected from the fifth aeration holes 31. The fourth aeration holes 22 have the following functions: First, they generate an upward and angular gas jet above the lower aeration plate 3. On a given circumferential line, the gas velocities at different heights are in the same direction, i.e., parallel flow. The aeration effect is the same on any frustum concentric with the second frustum, thereby balancing the dissolved oxygen effect at different radii and directions. The compressed air jets are injected obliquely upward and outward from the fourth aeration holes 22 into the surrounding water, oxygenating the water above the lower aeration plate 3 to form a fourth soda-water mixture. Secondly, because the compressed air is injected obliquely outward from the circumference, the range of oxygen exchange with the water is increased. Thirdly, the compressed air collides and cuts with the first, second, third, and fourth soda-water mixtures injected from the aeration plates of other surrounding aerators, making the water droplets and bubbles smaller and denser, transferring more oxygen into the water and improving the oxygen transfer efficiency. Fourthly, the compressed air collides and cuts with the fifth soda-water mixture injected upward from the lower aeration plate, making the water droplets and bubbles smaller and denser, and improving the oxygen transfer efficiency. Fifth, the injection direction of the fourth soda-water mixture intersects the vertical axis, and the angle with the vertical axis is β, and β is less than α. Therefore, the injection directions of the second soda-water mixture and the fourth soda-water mixture are not parallel, but cross, so that the two soda-water mixtures mix and cut each other at the top, continuously transferring oxygen and continuously strengthening the oxygen transfer effect at the top (the direction of the resultant force is upward and outward).

[0027] The upper end of the lower aeration plate 3 is a horizontally mounted flat plate with fifth aeration holes 31 formed in it. The centerline of the fifth aeration holes 31 is parallel to the axis of the aerator. The gas ejected from these holes is parallel to one another, transferring oxygen to the upper water column to form a soda-water mixture. The hole diameter of the fifth aeration holes 31 is the same as that of the first aeration holes, ranging from 80 to 120 μm. The fifth aeration holes 31 are densely distributed in an annular area at the top of the lower aeration plate 3 (outside the diameter of the lower end of the second frustum). High-pressure, closely spaced, parallel compressed air is ejected from the fifth aeration holes 31 at high speed into the upper water column, generating small bubbles that continuously mix with the water above to form the fifth soda-water mixture. This process continuously transfers oxygen to the water column. The fifth aeration hole 31 has the following functions: First, the direction of the fifth soda-water mixture generated is vertically upward, and is located outside and below the fourth soda-water mixture generated by the fourth aeration hole 22. The injection direction of the fourth soda-water mixture intersects the vertical axis and the angle between the fourth soda-water mixture and the vertical axis is β (as shown in FIG. Figure 3 As shown), and the injection speed of the fifth soda-water mixture is greater than that of the fourth soda-water mixture. Therefore, the fifth soda-water mixture in a vertical state in different directions of the circumference is injected into the fourth soda-water mixture at a high speed, and the two soda-water mixtures collide, cut and mix violently, making the water droplets and bubbles smaller and denser; at the same time, the two soda-water mixtures constantly change the movement path of the soda-water mixtures. The combined effect of these two aspects transfers more oxygen into the water, continuously strengthens the transfer effect of oxygen above (the direction of the resultant force is upward and outward), and effectively improves the oxygen transfer efficiency: second, the second soda-water mixture, the fourth soda-water mixture and the mixed soda-water mixture injected obliquely from other surrounding aerators collide, cut and mix, and the movement path of the new soda-water mixture is constantly changed, further improving the oxygen transfer efficiency: third, the new soda-water mixture formed after mixing with the fourth soda-water mixture is then merged with the mixture formed by mixing the third soda-water mixture and the second soda-water mixture above, and then enters into the water. Further transfer of oxygen can be achieved, thus improving the oxygen transfer efficiency again: Fourthly, the spiral soda-water mixture generated by the spiral disk 4 is continuously lifted upward after multiple increases in sludge activity and dilution of the sewage mixture (the upward high-speed airflow forms a negative pressure on the circumference of the lower aeration disk 3, thereby causing the sewage at the bottom to move upward after dilution and density reduction). The high-speed jetted gas continuously merges into the sewage with a high sludge content and drives the sewage to move upward, causing the sewage to continuously diffuse and dilute, so as to continuously transfer oxygen to the sewage and enable the sludge to absorb more oxygen, thereby balancing the sludge activity in the height direction and making the process run efficiently.

[0028] During the aeration process described above, the vertical upward injection of gas into the water above forms the first, third, and fifth soda-water mixtures, representing primary aeration. This movement of gas continuously dissolves oxygen into the water, aerating and oxygenating the water above, thereby improving oxygen transfer efficiency. The circumferential injection of gas at varying radii into the water forms the second and fourth soda-water mixtures, representing auxiliary aeration, aerating and oxygenating the surrounding and upper water bodies. Because auxiliary aeration has no downward component, there is no waste of air resources; all air is used to aerate and oxygenate the upper and peripheral water bodies, thereby enhancing dissolved oxygen. The primary and auxiliary aeration processes interact and reinforce each other, jointly strengthening oxygen transfer from the upper soda-water mixture (the combined force is directed upward and outward).

[0029] like Figure 4 As shown, the spiral disk 4 is formed by an inner spiral surface, an outer spiral surface, and an end surface. The top of the spiral disk 4 is open and connected to the bottom end 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 contains a gradually converging spiral chamber 42, with the small end of the spiral chamber 42 serving as the outlet. Eighth aeration holes 44 are located at the junction of the inner and outer spiral surfaces, i.e., the small end of the spiral chamber 42. The eighth aeration holes 44 are distributed along the height direction. Compressed air moves in a spiral manner within the spiral chamber 42. Preferably, both the inner and outer spiral surfaces are convex surfaces extending away from the axis. The outer spiral surface is provided with sixth aeration holes 41. The hole diameter of the sixth aeration holes 41 is 200 to 400 μm, and the center-to-center distance between the holes is 5 to 8 times that of the first aeration holes 11. The velocity of the gas ejected from the sixth aeration holes 41 is 0.4 to 0.8 m / s less than the velocity of the gas ejected from the fifth aeration holes. During operation, compressed air is ejected from the sixth aeration hole 41 in a direction away from the axis, spraying and oxygenating the sludge at the bottom of the pool on the outer circle of the spiral disk 4, diluting the sludge at the bottom of the pool without sedimentation, reducing the density and causing the sewage to float to form a sixth soda-water mixture. The compressed air continuously impacts the sludge at the bottom of the pool and transfers oxygen to the sludge.

[0030] The inner spiral surface is provided with a seventh aeration hole 43. The diameter of the seventh aeration hole 43 is 200-400 μm, and the center-to-center distance between the seventh aeration holes 43 is 5-8 times that of the first aeration holes 11. The velocity of the gas ejected from the seventh aeration hole 43 is 0.4-0.8 m / s slower than that from the fifth aeration hole. Compressed air is ejected from the seventh aeration hole 43 toward the axis, injecting and oxygenating the sludge at the bottom of the tank near the axis, diluting the sludge and preventing it from settling. The density is reduced, causing the wastewater to float, forming a seventh soda-water mixture. Air continuously impacts the sludge at the bottom of the tank, transferring oxygen to the sludge. Because the sludge concentration at the bottom of the tank is higher, this area requires more oxygen. The sixth and seventh soda-water mixtures effectively ensure the activity of the sludge at the bottom of the tank.

[0031] At the outlet of the spiral chamber 42, eighth aeration holes 44 are provided. The diameter of the eighth aeration holes 44 is 80 μm, and the center-to-center distance between the eighth aeration holes is equal to the center-to-center distance between the first aeration holes. The eighth aeration holes 44 generate high-velocity spiraling gas. The velocity of the gas ejected from the eighth aeration holes 44 is greater than or equal to the velocity of the gas ejected from the first aeration holes.

[0032] Preferably, Figure 4 and Figure 5 As shown, the apparatus of this embodiment further includes a cyclone body 45, which is disposed inside the outer spiral surface extending outside the spiral chamber 42 and has a spiral shape. The eighth aeration hole 44 is opposite to the surface of the cyclone body 45. Preferably, the cyclone body 45 extends outward from the side of the lower aeration plate 3.

[0033] The horizontal projection arc length of cyclone body 45 is greater than 40 mm to ensure that the eighth soda-water mixture ejected from eighth aeration hole 44 continues to be ejected in a spiral along the spiral surface of cyclone body 45, thereby forming a spiral of soda-water mixture. The function of cyclone body 45 is to gradually lift the spiraling eighth soda-water mixture upward, thereby causing the diluted sewage to move upward.

[0034] The spiraling gas in the spiral disk 4 is ejected at high speed from the eighth aeration hole 44, forming a spiraling eighth soda-water mixture. This eighth soda-water mixture transfers oxygen into the water and propels the diluted and floating sewage at the bottom of the pool into a spiral motion. On the one hand, the spiraling soda-water mixture collides and mixes with the inward-spraying seventh soda-water mixture from the seventh aeration hole on the inner spiral surface, further transferring oxygen. Simultaneously, the interaction between the soda-water mixtures in different motion states continuously lifts the diluted sewage at the bottom of the pool. On the other hand, the spiraling eighth soda-water mixture collides and mixes with the eighth soda-water mixture formed by the spiral disks of adjacent aerators and the outward-spraying sixth soda-water mixture from the sixth aeration hole on the outer spiral surface of adjacent aerators, continuously lifting the diluted sewage at the bottom of the pool. When the sewage rises to the level of the lower aeration disk 3, it is further diluted and continuously lifted by the vertically upward fifth soda-water mixture and the diagonally upward fourth soda-water mixture, moving outward and upward. Subsequently, the third soda-water mixture formed by high-speed injection of the third aeration holes 21 on the middle aeration plate 2 and the second soda-water mixture formed by high-speed injection of the second aeration holes 12 on the upper aeration plate 1 are further diluted and elevated, and driven by the second soda-water mixture that is parallel in the height direction, they continue to move outward and upward in relay, continuously diluting the sludge and transferring oxygen, further improving the oxygen transfer efficiency, and transferring more oxygen into the water.

[0035] In the above embodiment, the spiral disk 4 functions as follows: (1) compressed air is ejected from the sixth aeration hole 41 in a direction away from the axis to form a sixth soda-water mixture, which is then ejected and oxygenated to the sludge at the bottom of the pool on the outer circle of the spiral disk, diluting the sludge at the bottom of the pool without causing sedimentation. The high-speed air continuously impacts the sludge at the bottom of the pool, transferring oxygen to the sludge, thereby increasing the activity of the sludge. (2) compressed air is ejected from the seventh aeration hole 43 in an axial direction to form a seventh soda-water mixture, which is ejected and oxygenated to the sludge at the bottom of the pool near the axis, diluting the sludge at the bottom of the pool without causing sedimentation. The high-speed air continuously impacts the sludge at the bottom of the pool, transferring oxygen to the sludge, thereby increasing the activity of the sludge. (3) spiral gas is ejected at high speed from the eighth aeration hole 44 to form a spiral eighth soda-water mixture, transferring oxygen to the water and driving the continuously diluted sewage at the bottom of the pool to move in a spiral manner, thereby increasing the movement path of the soda-water mixture. The spiraling eighth stream of the soda-water mixture collides, cuts, and mixes with the inward-spraying seventh stream, transferring more oxygen to the sludge and enhancing sludge activity. When the eighth stream collides with the sixth stream of the soda-water mixture from the surrounding aerators, the two streams squeeze each other. Due to the confinement of the tank bottom, the mixture at the bottom is lifted and raised. The cyclone 45 continuously lifts the spiraling eighth stream of the soda-water mixture upward, causing the diluted wastewater to move upward.

[0036] The spiraling eighth stream of water-steam mixture collides, cuts, and mixes with the sixth and eighth streams ejected outward from the spiral disc of the adjacent aerator, transferring more oxygen to the sludge and increasing sludge activity. When the eighth stream collides with the sixth and eighth streams from the adjacent aerators, the three streams squeeze each other. Due to the confinement of the tank bottom, the streams at the bottom of the tank are lifted and raised. The cyclone 45 gradually lifts the spiraling eighth stream upward, causing the diluted wastewater to move upward. When the wastewater reaches the level of the lower aeration disc 3, it is further diluted and continuously lifted by the fifth stream of water-steam mixture ejected vertically upward from the fifth aeration holes (creating negative pressure that causes the lower wastewater to move upward) and by the fourth stream of water-steam mixture ejected obliquely upward and outward from the fourth aeration holes, further increasing sludge activity. Subsequently, the negative pressure generated by the third soda-water mixture formed by the third aeration hole on the middle aeration plate and the second soda-water mixture formed by the second aeration hole on the upper aeration plate continuously move 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 increasing the activity of the sludge.

[0037] Preferably, there are N aerators connected to the gas pipeline via an air inlet pipe 5; N is an integer greater than 1. The aerators are arranged in an array. Providing multiple aerators allows the gas-water mixture between adjacent aerators to collide, cut, and mix, continuously diluting the sludge and transferring oxygen, thereby enhancing sludge activity.

[0038] Using the equipment in the above embodiment or preferred example, a method for treating medical wastewater is performed, comprising the following steps: Step 10: Start the blower and fill the inner cavity of the aerator with compressed air.

[0039] Start the blower, and the compressed air passes through the horizontal pipes arranged in the grid at the bottom of the pool and enters the corresponding aerator cavity through the respective air inlet pipes 5. The compressed air is ejected upward and outward at high speed from the aeration holes of each aeration plate.

[0040] Step 20: The aerator is provided with aeration holes. Compressed air passes through the aeration holes and is sprayed to the outside to form a soda-water mixture, so that oxygen is continuously dissolved in the water.

[0041] Step 30: Use the soda-water mixture to make the sewage at the bottom of the pool flow upward and dilute the sewage.

[0042] Preferably, step 20 includes: compressed air is sprayed at high speed from the first aeration hole 11 of the upper aeration plate 1 into the upper water body to generate bubbles, which are mixed with the water body above to form a first soda-water mixture; compressed air is sprayed 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 to form a second soda-water mixture; the second soda-water mixture is in an inclined state.

[0043] Closely spaced parallel or radial streams of compressed air at a constant pressure are ejected at high speed from the first aeration holes 11 of the upper aeration plate 1 into the water above, generating bubbles that mix with the water above, forming a first soda-water mixture. Around the circumference of the upper aeration plate 1, parallel jets of air are ejected obliquely upward and outward from the second aeration holes 12 into the surrounding water, oxygenating the water above the middle aeration plate 2 and forming a second soda-water mixture. This oblique outward injection of compressed air increases the range of oxygen exchange with the water.

[0044] Preferably, step 20 also includes: compressed air is sprayed at high speed from the third aeration hole 21 of the middle aeration plate 2 into the upper water body to generate bubbles, which are mixed with the water body above to form a third soda-water mixture; the third soda-water mixture is in a vertical state; the third soda-water mixture and the second soda-water mixture collide, cut and mix; compressed air is sprayed 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 to form a fourth soda-water mixture; the fourth soda-water mixture is in a tilted state.

[0045] Closely spaced, parallel streams of compressed air at a constant pressure are ejected at high speed from the third aeration holes 21 in the middle aeration plate 2 into the upper water body, generating bubbles that continuously mix with the water above, forming a third soda-water mixture. The third soda-water mixture, held vertically in different circumferential directions, is injected at high speed into the second soda-water mixture, which is ejected upward and outward at an angle. The two streams violently collide, cut, and mix, making the water droplets and bubbles smaller and more dense. Simultaneously, the path of the soda-water mixture is continuously altered. These two combined effects transfer more oxygen to the upper water body, continuously transferring oxygen to the water above and effectively improving oxygen transfer efficiency. Each of the parallel jets of compressed air is ejected obliquely upward and outward from the fourth aeration holes 22 into the surrounding water body, oxygenating the water above the lower aeration plate 3 and forming a fourth soda-water mixture. The outward-angled ejection of the air increases the range of oxygen exchange with the water body.

[0046] Preferably, step 20 also includes: compressed air is sprayed at high speed from the fifth aeration hole 31 on the lower aeration plate 3 into the upper water body to generate bubbles, which are continuously mixed with the water body above to form a fifth soda-water mixture; the fifth soda-water mixture is in a vertical state; the fifth soda-water mixture collides, cuts and mixes with the fourth soda-water mixture; the soda-water mixture formed by mixing the fifth soda-water mixture and the fourth soda-water mixture cuts and mixes the soda-water mixture formed by mixing the third soda-water mixture and the second soda-water mixture.

[0047] Parallel compressed air with a certain pressure and small intervals is sprayed at high speed from the fifth aeration hole 31 on the lower aeration plate 3 into the upper water body, generating bubbles, which are continuously mixed with the water body above to form a fifth soda-water mixture. The fifth soda-water mixture is injected into the inclined fourth soda-water mixture at high speed, and the two soda-water mixtures collide, cut and mix violently, making the water droplets and bubbles smaller and denser. At the same time, the movement path of the soda-water mixture is constantly changing. The combined effect of these two aspects transfers more oxygen into the water, continuously strengthening the transfer effect of oxygen from above. Further, the new soda-water mixture formed after mixing with the fourth soda-water mixture is mixed with the third soda-water mixture and the second soda-water mixture above to form a new mixture, which is again integrated with each other to further transfer oxygen, thereby further improving the oxygen transfer efficiency.

[0048] Preferably, the step 20 further comprises: injecting compressed air from the sixth aeration hole 41 in a direction away from the axis to form a sixth soda-water mixture, injecting and oxygenating the sludge at the bottom of the outer circle of the spiral disk, and diluting the sludge at the bottom of the pool.

[0049] Compressed air is ejected from the sixth aeration hole 41 in a direction away from the axis, forming a sixth soda-water mixture. This mixture sprays and oxygenates the sludge at the bottom of the outer ring of the spiral disk, diluting it and preventing sedimentation. This reduces the density of the sludge, causing it to float. The air continuously impacts the sludge at the bottom of the tank, transferring oxygen into the sludge.

[0050] Preferably, the step 20 further comprises: injecting compressed air from the seventh aeration hole 43 in the axial direction to form a seventh soda-water mixture, injecting and oxygenating the sludge at the bottom of the inner circle of the spiral disk, and diluting the sludge at the bottom of the pool.

[0051] Compressed air is ejected from seventh aeration hole 43 toward the axis of spiral disk 4, forming a seventh soda-water mixture. This mixture oxygenates and sprays the sludge at the bottom of the inner circle of spiral disk 4, diluting it and preventing sedimentation. This reduces the density of the sludge, causing it to float. The air continuously impacts the sludge at the bottom, transferring oxygen to the sludge and increasing its activity.

[0052] Preferably, step 20 also includes: compressed gas is ejected at high speed from the eighth aeration hole 44 to form an eighth soda-water mixture that spirals and gradually moves upward, transfers oxygen to the water, and drives the continuously diluted sewage at the bottom of the pool to perform a spiral upward motion, thereby increasing the movement path of the soda-water mixture; the eighth soda-water mixture collides, cuts, and mixes with the seventh soda-water mixture; the eighth soda-water mixture, the seventh soda-water mixture, and the mixture after the eighth soda-water mixture and the seventh soda-water mixture collide with each other and squeeze each other, causing the mixture at the bottom of the pool to lift and rise upward; the cyclone 45 gradually lifts the eighth soda-water mixture that is performing a spiral motion upward, causing the diluted sewage to move upward.

[0053] Spiraling gas emanates from the eighth aeration hole 44, forming a spiraling, gradually upward-lifting eighth stream of soda and water. This transfers oxygen into the water and drives the continuously diluted wastewater at the bottom of the tank into a spiraling motion, increasing the flow path of the soda and water mixture. The spiraling eighth stream collides, cuts, and mixes with the inward-spraying seventh stream, transferring more oxygen to the sludge and enhancing sludge activity. When the eighth and seventh streams collide, they squeeze each other, causing the confinement of the tank bottom to lift and elevate the mixture at the bottom. The cyclone 45 gradually lifts the spiraling eighth stream of soda and water, causing the diluted wastewater to move upward.

[0054] Preferably, the step 20 further includes: when the sewage moves up to the height of the lower aeration plate 3, it is diluted and lifted in sequence by the fifth soda-water mixture, the fourth soda-water mixture, the third soda-water mixture, and the second soda-water mixture moving upward at high speed.

[0055] The upward movement of the fifth soda-water mixture creates negative pressure around the lower aeration plate 3. As the sewage reaches the area around the lower aeration plate 3, it is lifted upward and further diluted and continuously lifted by the upward-sloping fourth soda-water mixture ejected from the fourth aeration holes. Driven by the fourth soda-water mixture, it continues to move upward and outward in a relay. Subsequently, the upward movement of the third soda-water mixture creates negative pressure around the middle aeration plate 2. As the sewage reaches the area around the middle aeration plate 2, it is lifted upward and further diluted and lifted by the second soda-water mixture ejected from the second aeration holes in the upper aeration plate 1. Driven by the parallel second soda-water mixture, it continues to move upward and outward in a relay, continuously diluting the sludge and transferring oxygen, further improving oxygen transfer efficiency and transferring more oxygen to the water.

[0056] Preferably, step 20 further includes: the second soda-water mixture, the fourth soda-water mixture, the sixth soda-water mixture, the seventh soda-water mixture, and the eighth soda-water mixture in one aerator collide, cut, and mix the first soda-water mixture, the second soda-water mixture, the third soda-water mixture, the fourth soda-water mixture, the fifth soda-water mixture, the sixth soda-water mixture, the seventh soda-water mixture, and the eighth soda-water mixture in an adjacent aerator, and a new mixture formed by mixing them together; the first soda-water mixture, the third soda-water mixture, and the fifth soda-water mixture in one aerator collide, cut, and mix the second soda-water mixture, the fourth soda-water mixture, the sixth soda-water mixture, the seventh soda-water mixture, and the eighth soda-water mixture in an adjacent aerator, and a new mixture formed by mixing them together.

[0057] The second soda-water mixture in one aerator collides and cuts with the first soda-water mixture and the second soda-water mixture sprayed from the upper aeration plates of other surrounding aerators, making the water droplets and bubbles smaller and denser, transferring more oxygen into the water to improve the oxygen transfer efficiency.

[0058] The third steam-water mixture in one aerator collides, cuts and mixes the second steam-water mixture sprayed obliquely from other surrounding aerators again to form a new steam-water mixture, and continuously changes the movement path of the new steam-water mixture, further improving the oxygen transfer efficiency.

[0059] The fourth soda-water mixture in one aerator collides and cuts with the first soda-water mixture, the second soda-water mixture, the third soda-water mixture and the fourth soda-water mixture sprayed from the aeration disks of other surrounding aerators, making the water droplets and bubbles smaller and denser, transferring more oxygen into the water, thereby improving the oxygen transfer efficiency.

[0060] The fifth soda-water mixture in one aerator collides, cuts and mixes the second soda-water mixture and the fourth soda-water mixture sprayed obliquely from other surrounding aerators, and continuously changes the moving path of the new soda-water mixture, further improving the oxygen transfer efficiency.

[0061] The spirally moving eighth stream of soda-water mixture in one aerator collides, cuts, and mixes with the sixth and eighth streams of soda-water mixture ejected outward from the spiral disks of adjacent aerators, transferring more oxygen to the sludge and improving sludge activity. When the eighth stream of soda-water mixture collides with the sixth and eighth streams of soda-water mixture from adjacent aerators, the three streams squeeze each other, causing the mixture at the bottom of the tank to rise upward due to the confinement of the tank bottom.

[0062] During the aeration process described above, the primary aeration process involves the vertically upward injection of gas into the water above, forming the first, third, and fifth gas-water mixtures. This movement continuously dissolves oxygen into the water, increasing the oxygen transfer rate. The secondary aeration process involves the injection of gas into the water at different circumferential directions, forming the second, fourth, sixth, seventh, and eighth gas-water mixtures. Because the secondary aeration process has no downward component, there is no waste of air resources; all air is used to aerate and oxygenate the water above, thereby enhancing dissolved oxygen. The primary and secondary aeration processes interact and reinforce each other, jointly strengthening the oxygen transfer from the gas-water mixture above (the combined force is directed upward and outward).

[0063] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described above. The specific embodiments and descriptions in the specification are intended only to further illustrate the principles of the present invention. The basic principles, main features, and advantages of the present invention are shown and described above without departing from the spirit and scope of the present invention. Those skilled in the art will appreciate that various changes and modifications may be made, and such changes and modifications are intended to fall within the scope of the invention as claimed.

Claims

1. An integrated medical wastewater treatment equipment, characterized in that: The device comprises an aerator, wherein the aerator comprises an upper aeration plate (1), a middle aeration plate (2), a lower aeration plate (3), a spiral plate (4) and an air inlet pipe (5) which are sequentially connected from top to bottom and communicate with each other; The top surface of the upper aeration plate (1) is provided with a first aeration hole (11), and the circumferential side surface of the upper aeration plate (1) is provided with a second aeration hole (12); the top surface of the middle aeration plate (2) is provided with a third aeration hole (21), and the circumferential side surface of the middle aeration plate (2) is provided with a fourth aeration hole (22); the top surface of the lower aeration plate (3) is provided with a fifth aeration hole (31); the spiral plate (4) is surrounded by an inner spiral surface, an outer spiral surface, and an end surface, 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 an eighth aeration hole (44) is provided at the connection between the inner spiral surface and the outer spiral surface, and the eighth aeration hole (44) is distributed along the height direction.

2. The device according to claim 1, characterized in that The upper aeration plate (1) is a hollow first frustum, the small end of the first frustum being located above the large end; The middle aeration plate (2) is a hollow second frustum, the small end of the second frustum is located above the large end; the diameter of the upper end of the second frustum is larger than the diameter of the lower end of the first frustum; The lower aeration plate (3) is a hollow cylinder, and the diameter of the lower aeration plate (3) is larger than the diameter of the lower end of the middle aeration plate (2); The spiral disk (4) is a hollow spiral cylinder.

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

4. The device according to claim 1, characterized in that The top of the upper aeration plate (1) is a plane, 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 plate (1) is an upper convex arc surface, and the center line of the first aeration hole (11) intersects with the axis of the aerator.

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

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

7. The device according to claim 1, characterized in that It also includes a cyclone body (45), which extends inside the outer spiral surface and is spiral-shaped; the eighth aeration hole (44) is opposite to the surface of the cyclone body (45).

8. The device according to claim 7, characterized in that The cyclone body (45) extends out of the side of the lower aeration plate (3).

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

10. The device according to claim 9, characterized in that The aerators are arranged in an array.

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