A sewage treatment equipment for domestic wastewater

Abstract

The present invention relates to the technical field of sewage treatment, and in particular to a sewage treatment device for domestic wastewater. It comprises a reaction tank, a discharge pipe is fixedly connected to the bottom of the reaction tank, the discharge pipe is fixedly connected and connected to a ring array of nozzles, a water pump is fixedly connected in the reaction tank, a first guide pipe is fixedly connected in the reaction tank, and the first guide pipe is used to connect the discharge pipe and the water pump. The present invention is used in the middle of an aeration tank to guide the activated sludge and sewage in the middle of a vortex upward, so that the activated sludge and sewage are first separated from the part with greater suction force of the vortex, and then freely fall from the upper part of the aeration tank to the bottom of the aeration tank, so as to realize the transfer of the activated sludge and sewage at the vortex. The activated sludge contacts with the sewage in the process of falling downward from the upper part of the aeration tank, and the organic matter in the sewage is decomposed, so as to realize the repeated treatment of the activated sludge and sewage and improve the treatment efficiency of sewage.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to sewage treatment equipment for domestic wastewater. Background Art

[0002] Domestic wastewater, also known as domestic sewage or residential sewage, refers to various wastewater generated from household life, commercial activities or light industrial activities. When these sewage is discharged directly into rivers, lakes and groundwater without treatment, it will seriously affect the drinking water safety and ecological environment of residents. Therefore, domestic wastewater needs to be treated.

[0003] The treatment of domestic sewage is currently divided into: pretreatment (for example: screens intercepting larger suspended solids and impurities), biological treatment (for example: activated sludge method or biofilm process), deep purification treatment (for example: activated carbon adsorption or membrane filtration), disinfection treatment (for example: ultraviolet, ozone disinfection). In biological treatment, jet aeration tanks are usually used for treatment. It uses a water pump to extract the activated sludge and sewage in the aeration tank, and then uses a nozzle to spray the activated sludge and sewage into the aeration tank in the form of a water jet. In the process of transferring the activated sludge and sewage, oxygen is added to the activated sludge and sewage. Through the contact between the activated sludge and sewage, the organic matter in the sewage is decomposed, thereby achieving sewage treatment.

[0004] In the process of spraying activated sludge and sewage from the nozzles in the existing jet aeration tank, a vortex is formed in the aeration tank. The purpose of this is to make the activated sludge and sewage in the aeration tank "move" to achieve uniform treatment of the sewage. However, in this process, the activated sludge in the center of the vortex will gather there and cannot be evenly dispersed around. This will make the sewage near the inner wall of the aeration tank unable to be treated, thus resulting in low efficiency. Summary of the invention

[0005] In order to solve the problems mentioned in the above background technology, the present invention provides a sewage treatment equipment for domestic wastewater.

[0006] The technical solution of the present invention is: a sewage treatment equipment for domestic sewage, which is used to remove organic matter in domestic sewage by biological treatment, including a reaction tank, a discharge pipe is fixedly connected to the bottom of the reaction tank, the discharge pipe is fixedly connected and connected to a ring-shaped array of nozzles, a water pump is fixedly connected in the reaction tank, a first material guide pipe is fixedly connected in the reaction tank, the first material guide pipe is used to connect the discharge pipe and the water pump, one side of the first material guide pipe is connected to an air inlet pipe, a fixed cylinder is coaxially fixed in the reaction tank, the discharge pipe is connected to the fixed cylinder, the fixed cylinder is provided with a plurality of material guide channels, the material guide channels are used to connect the fixed cylinder and the reaction tank, and the discharge pipe is used to transport activated sludge and sewage to the fixed cylinder.

[0007] Furthermore, a first baffle is fixedly connected to the fixed cylinder at a position close to the material guiding channel.

[0008] Furthermore, a fixing piece is fixedly connected in the fixing cylinder, a guide plate in an annular array is fixedly connected to the fixing piece, and a plurality of groups of V-shaped plates in an annular and linear array are fixedly connected to one side of the fixing piece close to the discharge pipe.

[0009] Furthermore, a first guide member is fixedly connected to the upper side of the fixed cylinder, a truncated cone groove is arranged in the first guide member, the truncated cone groove in the first guide member is connected to the fixed cylinder, the first guide member is fixedly connected to a first material guide member and a second material guide member which are arranged in an annular array and are connected to the truncated cone groove in the first guide member, the first material guide member in the annular array and the second material guide member in the annular array are staggered, and the first material guide member and the second material guide member are both provided with discharge ports distributed in a linear array.

[0010] Furthermore, two groups of second baffles in a ring-shaped and linear array are fixedly connected to one side of the first guide member facing the reaction pool, wherein the number of the second baffles in one group is consistent with the number of the first guide members, and the second baffles in this group respectively cooperate with adjacent discharge ports on adjacent first guide members to block them, and the number of the other group of second baffles is consistent with the number of the second guide members, and the second baffles in this group respectively cooperate with adjacent discharge ports on adjacent second guide members to block them.

[0011] Furthermore, a second guide member in an annular array is fixedly connected inside the first guide member and is located in the inner conical groove thereof, and the cross-section of the second guide member is triangular. A third guide member fixed to the first guide member is fixedly connected to the side of the fixed cylinder close to the first guide member, and the cross-section of the third guide member is triangular. An inclined surface is provided on the side of the first guide member close to the third guide member, and all the second baffles are located on the inclined surface of the first guide member.

[0012] Furthermore, a material guide shell is fixedly connected to one side of the first guide member away from the fixed cylinder, the material guide shell is connected to the truncated cone groove in the first guide member, and the material guide shell is fixedly connected to and connected to a second material guide tube in an annular array and all fixed to the outer side surface of the first guide member.

[0013] Furthermore, it also includes a rotating member, which is rotatably connected in the fixed cylinder, a torsion spring is arranged between the rotating member and the fixed cylinder, the rotating member is fixedly connected to a spiral shell of an annular array, the spiral shells of the annular array are all slidably matched with the fixed cylinder, a third material guide member is fixedly connected to the side of the spiral shell away from the rotating member, the cross-section of the third material guide member close to the adjacent spiral shell is C-shaped, the size of the C-shaped cross-section of the third material guide member close to the adjacent spiral shell is inconsistent with the size away from the spiral shell, and the spiral shell is provided with a feed port.

[0014] Furthermore, the fixed cylinder is fixedly connected to a circular array of fixed rods which are all fixed to the reaction tank. The fixed rods are twisted and sliding blocks which are fixed to the adjacent third material guide members are slidably connected to the fixed rods. A circular array of rope collectors is arranged in the reaction tank and the rope collectors are fixed to the adjacent sliding blocks.

[0015] Furthermore, the fixed cylinder is fixedly connected with a third baffle in an annular array, and the third baffle is located on the fixed cylinder near a position of an adjacent third material guide member.

[0016] The beneficial effects of the present invention are as follows: the present invention is used in the middle of the aeration tank, that is, the center of the vortex, to guide the activated sludge and sewage in the middle of the vortex upward, so that the activated sludge and sewage are first separated from the part with greater vortex suction, and then freely fall from the upper part of the aeration tank to the bottom of the aeration tank, so as to realize the transfer of the activated sludge and sewage at the vortex. The activated sludge contacts the sewage in the process of falling downward from the upper part of the aeration tank, and the organic matter in the sewage is decomposed, so as to realize the repeated treatment of the activated sludge and sewage and improve the treatment efficiency of the sewage.

[0017] In the process of sewage treatment, the spiral shell guides the mixed liquid so that the mixed liquid passes through the adjacent third guide piece and impacts the inner wall of the reaction tank, so that the activated sludge in the mixed liquid can be dispersed in the middle of the reaction tank, thereby increasing the uniformity of sewage treatment in the reaction tank, and the spiral shell intercepts the mixed liquid passing through the middle of the reaction tank, increasing the contact area between the activated sludge and sewage in the middle of the reaction tank, thereby improving the sewage treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0019] Figure 1 It is a front view of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a rear view of the three-dimensional structure of the present invention;

[0021] Figure 3 It is a top cross-sectional view of the three-dimensional structure of the present invention;

[0022] Figure 4 It is a bottom sectional view of the three-dimensional structure of the present invention;

[0023] Figure 5 is a three-dimensional structural cross-sectional view of the first guide member of the present invention;

[0024] Figure 6 It is a three-dimensional structural cross-sectional view of the fixing cylinder of the present invention;

[0025] Figure 7It is a three-dimensional structural cross-sectional view of the first guide member and the material guide shell of the present invention;

[0026] Figure 8 It is a three-dimensional structural exploded view of the first guide member, the first material guide member and the second material guide member of the present invention;

[0027] Fig. 9 It is a three-dimensional structural cross-sectional view of the rotating part of the present invention;

[0028] Fig.10 It is a schematic diagram of the three-dimensional structure of the spiral shell after being opened.

[0029] In the above drawings: 1: reaction tank, 2: discharge pipe, 3: nozzle, 4: water pump, 5: first material guide pipe, 6: air inlet pipe, 7: fixed cylinder, 8: material guide channel, 9: first baffle, 10: fixed part, 11: guide plate, 12: V-shaped plate, 13: first guide part, 14: first guide part, 15: second material guide part, 16: second baffle, 17: second guide part, 18: third guide part, 19: material guide shell, 20: second material guide pipe, 21: rotating part, 22: spiral shell, 23: third material guide part, 24: fixed rod, 25: slider, 26: rope collector, 27: third baffle. DETAILED DESCRIPTION

[0030] The present invention will now be described more fully below with reference to the accompanying drawings, in which currently preferred embodiments of the present invention are shown. However, the present invention may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness, and these embodiments fully convey the scope of the present invention to the skilled person.

[0031] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown or marked.

[0032] In order to solve the problem that the vortex created in the existing jet aeration tank can make the activated sludge and sewage evenly mixed, but it will affect the activated sludge in the vortex and prevent it from contacting with the sewage near the inner wall of the aeration tank, thereby reducing the sewage treatment efficiency in the aeration tank, the present invention adopts the middle part of the aeration tank, that is, the center of the vortex, to guide the activated sludge and sewage in the middle of the vortex upward, so that the activated sludge and sewage first separate from the part with greater vortex suction, and then freely fall from the upper part of the aeration tank to the bottom of the aeration tank, so as to realize the transfer of the activated sludge and sewage in the vortex. In the process of falling downward from the upper part of the aeration tank, the activated sludge contacts with the sewage and decomposes the organic matter in the sewage, thereby realizing repeated treatment of the activated sludge and sewage.

[0033] Example 1: A sewage treatment device for domestic sewage, used to remove organic matter from sewage by biological treatment, such as Figure 1-Figure 7 As shown, it includes a reaction tank 1. The reaction tank 1 is currently square. In the present invention, the reaction tank 1 is circular, which is used to reduce the dead corners of sewage treatment in the reaction tank 1. A control terminal (not marked in the figure) is arranged outside the reaction tank 1. A discharge pipe 2 is fixedly connected to the bottom of the reaction tank 1. The discharge pipe 2 is used to transport the activated sludge and sewage in the reaction tank 1. The discharge pipe 2 is fixedly connected and connected to a ring array of nozzles 3. The nozzles 3 are at least three, which are used to enable all the nozzles 3 to create a vortex in the reaction tank 1. A water pump 4 is fixedly connected to the reaction tank 1. The water pump 4 is electrically connected to the control terminal. A first guide pipe 5 is fixedly connected to the reaction tank 1. The first guide pipe 5 is used to connect the discharge pipe 2 and the water pump 4. The lower side of the water pump 4 extracts the activated sludge and sewage in the reaction tank 1, so that the activated sludge and sewage in the reaction tank 1 enter the first guide pipe 5 from the upper side of the water pump 4, thereby completing the activated sludge and sewage. For the transportation of water, the rear side of the upper part of the first guide pipe 5 is connected with an air inlet pipe 6 through a three-way valve. The air inlet pipe 6 is used to transport oxygen into the first guide pipe 5, which is conducive to the growth and reproduction of aerobic microorganisms in the activated sludge. A fixed cylinder 7 is coaxially fixed in the reaction tank 1. The discharge pipe 2 is connected with the fixed cylinder 7 through a connecting pipe. The vortex created by all the nozzles 3 is located at the central axis of the reaction tank 1. The fixed cylinder 7 is provided with a circular and linear array of guide channels 8. The guide channels 8 are used to connect the fixed cylinder 7 and the reaction tank 1. The guide channels 8 of the circular array are composed of at least two, which are used to guide the activated sludge and sewage outside the fixed cylinder 7 into it. The guide channels 8 of the linear array are composed of at least two, which are used to increase the amount of activated sludge and sewage entering the fixed cylinder 7 in a vertical state. The connecting pipe adjacent to the discharge pipe 2 is used to transport the activated sludge and sewage into the fixed cylinder 7.

[0034] like Figure 5 and Figure 6 As shown, the fixed cylinder 7 is fixedly connected with a first baffle 9 which is annular and distributed in a linear array. The first baffle 9 is located on the fixed cylinder 7 near the adjacent material guide channel 8. The cross section of the first baffle 9 is L-shaped and is used to shield part of the activated sludge and sewage. A fixing member 10 is fixedly connected in the fixed cylinder 7. The fixing member 10 is fixedly connected with a guide plate 11 in an annular array. There are at least three guide plates 11. The guide plates 11 are composed of a vertical plate and a spiral plate. The spiral plate is located on the upper side of the vertical plate. The lower side of the fixed member 10 is fixedly connected with a plurality of groups of V-shaped plates 12 which are annular and distributed in a linear array. The sharp portion of the V-shaped plate 12 faces downward. There are at least two groups of V-shaped plates 12. The V-shaped plates 12 are used to cut larger bubbles in sewage. The plurality of groups of V-shaped plates 12 distributed in a linear array are all located between the vertical plates of two adjacent guide plates 11.

[0035] like Figure 7 and Figure 8 As shown, a first guide 13 is fixedly connected to the upper side of the fixed cylinder 7, and a truncated cone-shaped groove is arranged in the first guide 13. The truncated cone-shaped groove in the first guide 13 is communicated with the fixed cylinder 7. The activated sludge and sewage in the vortex outside the fixed cylinder 7 are blocked by the lower side of the first guide 13 during the process of moving upward along the outer side thereof, so that the activated sludge and sewage move along the lower side of the first guide 13 until they fall back into the reaction tank 1. The activated sludge falling downward re-treats the sewage in the reaction tank 1, and removes the organic matter in the sewage in the reaction tank 1, thereby completing the repeated treatment of the activated sludge and sewage. The first guide 13 is fixedly connected with a plurality of truncated cone-shaped grooves in an annular array and each truncated cone-shaped groove is connected to the fixed cylinder 7. The first material guide member 14 and the second material guide member 15 connected by the inner conical groove are longer than the adjacent second material guide member 15, and the first material guide member 14 and the second material guide member 15 are composed of at least two, which are used to make the first material guide member 14 or the second material guide member 15 form a circle, and evenly guide the activated sludge and sewage in a circular manner, so that the activated sludge and sewage fall evenly into the reaction tank 1. The first material guide members 14 of the annular array and the second material guide members 15 of the annular array are staggered, which are used to increase the falling range of the activated sludge and sewage. The first material guide member 14 and the second material guide member 15 are both provided with discharge ports distributed in a linear array.

[0036] like Figure 8 As shown, two groups of second baffles 16 in a circular and linear array are fixedly connected to one side of the first guide member 13 facing the reaction tank 1. The second baffles 16 are C-shaped, and the opening of the second baffles 16 faces away from the rotation direction of the vortex mentioned above. The second baffles 16 are in contact with the activated sludge in the mixed liquid to divide the activated sludge and reduce the size of the activated sludge in the mixed liquid. The number of one group of second baffles 16 is consistent with the number of first material guide members 14, and the second baffles 16 of this group are respectively blocked and cooperated with adjacent discharge ports on adjacent first material guide members 14. The number of another group of second baffles 16 is consistent with the number of second material guide members 15, and the second baffles 16 of this group are respectively blocked and cooperated with adjacent discharge ports on adjacent second material guide members 15.

[0037] like Figure 8As shown, the first guide member 13 is fixedly connected with a second guide member 17 in an annular array and located in the inner conical groove thereof. The projection of the second guide member 17 on the horizontal plane is a triangle, which is used to guide adjacent activated sludge and sewage. The upper side of the fixed cylinder 7 is fixedly connected with a third guide member 18 fixed to the lower side of the first guide member 13. The third guide member 18 is annular, and the cross-section of the third guide member 18 is triangular. The lower side of the first guide member 13 is provided with an inclined surface, and the distance between the lower side of the inclined surface close to the central axis of the first guide member 13 and the bottom of the reaction tank 1 is smaller than the distance between the lower side of the inclined surface away from the central axis of the first guide member 13 and the bottom of the reaction tank 1, and all the second baffles 16 are located on the inclined surface of the first guide member 13.

[0038] like Figure 7 and 8 As shown, a material guide shell 19 is fixedly connected to one side of the first guide member 13 away from the fixed cylinder 7, and the material guide shell 19 is connected to the truncated cone-shaped groove in the first guide member 13. The outer side surface of the material guide shell 19 is fixedly connected and connected to a second material guide pipe 20 in an annular array and all fixed to the first guide member 13. There are at least three second material guide pipes 20, which are used to guide the second material guide pipes 20 and the activated sludge and sewage to the upper side surface of the first guide member 13 in a circumferentially uniform manner.

[0039] Before treating the domestic wastewater, the staff connects the air outlet of the external oxygen supply equipment to the air inlet pipe 6, and then puts the activated sludge and sewage into the reaction tank 1 (hereinafter the activated sludge and sewage are collectively referred to as mixed liquid).

[0040] When the liquid level of the mixed liquid in the reaction tank 1 submerges the first guide member 13 but does not submerge the reaction tank 1, the staff stops injecting the mixed liquid, and then operates the water pump 4 to extract the mixed liquid in the reaction tank 1, so that the mixed liquid in the reaction tank 1 is transported to the first guide pipe 5 through the lower side of the water pump 4. During the mixed liquid passing through the first guide pipe 5, the staff operates the external oxygen supply equipment to inject oxygen into the first guide pipe 5 through the air inlet pipe 6 (oxygen forms bubbles in the water environment after entering the water environment), and then the first guide pipe 5 transports the mixed liquid and bubbles to the discharge pipe 2. The discharge pipe 2 sprays part of the mixed liquid and oxygen therein through all the nozzles 3, and the other part of the mixed liquid and oxygen enter the fixed cylinder 7 through the connecting pipe.

[0041] In the process of treating the mixed liquid in the reaction tank 1, the mixed liquid and bubbles sprayed from all the nozzles 3 cause the mixed liquid in the reaction tank 1 to gradually rotate (a vortex is formed in the middle of the reaction tank 1 during the rotation), and the contact between the activated sludge and the bubbles in the mixed liquid promotes the growth and reproduction of aerobic microorganisms in the activated sludge, thereby purifying the sewage through the aerobic microorganisms in the activated sludge.

[0042] Under the action of the mixed liquid sprayed out by all nozzles 3 to form a vortex, the "vortex" rotates around the fixed cylinder 7, and the mixed liquid in the "vortex" moves upward during the rotation of the fixed cylinder 7. Under the action of the first baffle 9 blocking part of the mixed liquid, the blocked mixed liquid enters the fixed cylinder 7 through the adjacent material guide channel 8, reducing the amount of activated sludge in the mixed liquid around the outside of the fixed cylinder 7, thereby reducing the amount of activated sludge in the "vortex", avoiding the activated sludge from gathering in the "vortex", resulting in the sewage near the inner wall side of the reaction tank 1 unable to contact with the activated sludge, thereby reducing the efficiency of sewage treatment.

[0043] When the mixed liquid moves along the fixed cylinder 7 until it contacts the outer side of the third guide member 18, the third guide member 18 guides the mixed liquid to the inclined surface on the lower side of the first guide member 13, so that the mixed liquid diffuses to the surroundings, and the activated sludge in the mixed liquid falls downward under the action of gravity and contacts the sewage, thereby realizing repeated treatment of the sewage. During the diffusion of the mixed liquid through the inclined surface on the lower side of the first guide member 13, it contacts the adjacent second baffle 16, and the second baffle 16 divides the activated sludge in the mixed liquid to reduce the size of the activated sludge in the mixed liquid.

[0044] The mixed liquid and bubbles entering the fixed cylinder 7 are guided by the fixing member 10 and all the guide plates 11 to move upward. When the mixed liquid and bubbles contact the adjacent V-shaped plates 12, the V-shaped plates 12 cut the bubbles and reduce the diameter of the bubbles, making it easier for the small bubbles to contact the activated sludge in the mixed liquid, thereby increasing the oxygen content of the activated sludge. When the mixed liquid passes through all the guide plates 11, the mixed liquid is converted from moving vertically upward to moving in a spiral manner.

[0045] When the mixed liquid in the fixed cylinder 7 moves upward in a rotating state, the mixed liquid is transported to the truncated cone groove in the first guide member 13. Under the separation effect of all the second guide members 17, part of the mixed liquid in the truncated cone groove in the first guide member 13 enters all the first material guide members 14 and the second material guide members 15, and flows out from the discharge ports on all the first material guide members 14 and the second material guide members 15. The activated sludge in the mixed liquid falls downward under the action of gravity. Under the action of the second baffle 16 shielding the mixed liquid, the mixed liquid in all the first material guide members 14 and the second material guide members 15 will not collide with the mixed liquid driven by the "vortex" during the falling process. In the above manner, the mixed liquid is transferred to the upper part of the reaction tank 1, and then the mixed liquid falls from the upper part of the reaction tank 1, simulating the way of rain, so that the activated sludge in the mixed liquid falls from the upper part of the reaction tank 1 to the bottom thereof, thereby increasing the contact degree between the activated sludge and the sewage and enhancing the sewage treatment effect.

[0046] Another part of the mixed liquid in the truncated cone-shaped groove of the first guide member 13 enters the guide shell 19 and slides out from all the second guide tubes 20. When the mixed liquid sliding out of the second guide tubes 20 passes through the upper side of the first guide member 13, the mixed liquid is accelerated, so that the mixed liquid falls into the reaction tank 1 in an accelerated state. Through the above process, the range of the mixed liquid falling into the reaction tank 1 is expanded, thereby increasing the contact degree between the activated sludge and the sewage.

[0047] After the treatment of the mixed liquid is completed, the staff can replace the liquid in the reaction tank 1, and the subsequent process of treating the mixed liquid can be repeated as described above.

[0048] When the mixed liquid is no longer required to be processed, the water pump 4 stops extracting the mixed liquid in the reaction tank 1 , and then the staff stops the oxygen supply through the air inlet pipe 6 .

[0049] Embodiment 2: Based on embodiment 1, Figure 5 , Figure 6 , Fig. 9 and Fig.10 As shown, it also includes a rotating member 21 rotatably connected to the middle part of the fixed cylinder 7. The rotating member 21 is annular, and the cross-section of the rotating member 21 is F-shaped. A torsion spring is arranged between the rotating member 21 and the fixed cylinder 7. The torsion spring is used to drive the rotating member 21 to reset and rotate. The rotating member 21 is fixedly connected to a spiral shell 22 in an annular array. The spiral shell 22 is a deformable material. It is best to have two spiral shells 22. When the spiral shell 22 is less than two, the vortex in the reaction pool 1 will be unstable. When the spiral shell 22 is more than two, the resistance of the vortex in the reaction pool 1 will be increased, which will affect the vortex. The spiral shells 22 of the annular array are all in sealing and sliding cooperation with the fixed cylinder 7. The third material guide member 23 is fixedly connected to one side of the spiral shell 22 outside the fixed cylinder 7. The third material guide member 23 is composed of a C-shaped shell and an elliptical shell. The size of the cross-section of the C-shaped shell on the third material guide member 23 gradually decreases proportionally from the side close to the adjacent rotating member 21 to the side away from the adjacent rotating member 21, and is used to guide the activated sludge and sewage and accelerate the flow speed of the activated sludge and sewage. A feed port is provided on the side of the spiral shell 22 away from the adjacent third material guide member 23.

[0050] like Figure 5 , Figure 6 , Fig. 9 and Fig.10 As shown, the middle of the fixed cylinder 7 is fixedly connected with a ring array of fixed rods 24 which are all fixed to the reaction pool 1. The fixed rods 24 are rectangular long rods. The number of the fixed rods 24 is consistent with the number of the spiral shells 22. The fixed rods 24 are slidably connected with sliders 25 fixed to the adjacent third guide members 23. The fixed rods 24 are twisted, and the adjacent sliders 25 are slightly turned over during the sliding process along the fixed rods 24, so that the spiral shells 22 are stretched to Fig.10After reaching the state in the middle, the inclined part of the lower side of the spiral shell 22 faces the rotation direction of the "vortex", and a ring-shaped array of rope collectors 26 is arranged in the reaction tank 1. The rope collector 26 is electrically connected to the control terminal, and the rope end of the rope collector 26 is fixedly connected to the adjacent slider 25. The fixed cylinder 7 is fixedly connected with a ring-shaped array of third baffles 27. The number of the third baffles 27 is consistent with the number of the spiral shells 22. The third baffle 27 is located on the fixed cylinder 7 near the adjacent third material guide member 23. The third baffle 27 is L-shaped and is used to block part of the activated sludge and sewage.

[0051] In the process of treating the mixed liquid in the reaction tank 1, the mixed liquid in the "vortex" moves upward synchronously during the rotation of the fixed cylinder 7. When part of the mixed liquid in the "vortex" encounters the obstruction of the adjacent third baffle 27, part of the mixed liquid in the "vortex" enters the side of the adjacent third guide member 23 close to the adjacent third baffle 27, and is ejected from the side of the third guide member 23 away from the adjacent third baffle 27. By virtue of the proportional enlargement of the C-shaped cross-section of the third guide member 23 from the side close to the adjacent spiral shell 22 to the side away from the adjacent spiral shell 22, the speed of the mixed liquid ejected from the side of the third guide member 23 away from the adjacent third baffle 27 is increased, and part of the mixed liquid in the "vortex" is moved away from the "vortex", thereby preventing the activated sludge in the mixed liquid from gathering in the center of the "vortex", resulting in the activated sludge in the center of the "vortex" being unable to contact the sewage near the inner wall of the reaction tank 1.

[0052] During the process of treating the mixed liquid in the reaction tank 1, the staff intermittently operates the two rope retractors 26 to drive the adjacent sliders 25 to move or withdraw along the adjacent fixed rods 24 toward the inner wall of the reaction tank 1. During the movement of the sliders 25, the adjacent third material guide member 23 is driven to move toward the inner wall of the reaction tank 1 at the same time. During the movement of the third material guide member 23, the adjacent spiral shell 22 is pulled out from the middle of the fixed cylinder 7. During the pulling out of the spiral shell 22, the rotating member 21 is rotated and drives the adjacent torsion spring to be gradually tightened.

[0053] During the movement of the slider 25 and the adjacent spiral shell 22 , the slider 25 deflects along the adjacent fixing rod 24 , thereby causing the portion of the adjacent spiral shell 22 located in the reaction tank 1 to slightly flip.

[0054] When the two spiral shells 22 present Fig.10 After reaching the state in the middle, the two rope take-ups 26 no longer drive the adjacent sliders 25 to move. At this time, part of the mixed liquid in the "vortex" enters into the spiral shell 22 through the adjacent feed port, and is ejected from the side of the spiral shell 22 close to the adjacent third material guide member 23, so that the mixed liquid passes through the adjacent third material guide member 23 and impacts the inner wall of the reaction tank 1, so that the activated sludge in the mixed liquid can be dispersed in the middle of the reaction tank 1, thereby increasing the uniformity of sewage treatment in the reaction tank 1.

[0055] The spiral shell 22 is released to Fig.10 After reaching the state in the middle, the spiral shell 22 intercepts the mixed liquid passing through the middle of the reaction tank 1, increasing the contact area and contact opportunity between the activated sludge and sewage in the middle of the reaction tank 1, thereby improving the treatment effect on the sewage.

[0056] When the two rope take-ups 26 drive the adjacent sliders 25 to withdraw along the adjacent fixing rods 24, the rope take-ups 26 no longer stretch the adjacent sliders 25, and the rotating member 21 drives the two spiral shells 22 to return and rotate under the action of the adjacent torsion springs, so that the spiral shell 22 drives the adjacent sliders 25 to withdraw along the adjacent fixing rods 24 during the process of returning to the original position, thereby realizing the return of the spiral shell 22. The spiral shell 22 is returned to the original position. Fig. 9 After the state is in, the rope collecting device 26 no longer works.

[0057] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A sewage treatment equipment for domestic sewage, used to remove organic matter from sewage by biological treatment, characterized in that: The invention comprises a reaction tank (1), wherein a discharge pipe (2) is fixedly connected to the bottom of the reaction tank (1), the discharge pipe (2) is fixedly connected to and communicated with a ring-shaped array of nozzles (3), a water pump (4) is fixedly connected to the reaction tank (1), a first guide pipe (5) is fixedly connected to the reaction tank (1), the first guide pipe (5) is used to connect the discharge pipe (2) and the water pump (4), one side of the first guide pipe (5) is connected to an air intake pipe (6), a fixed cylinder (7) is coaxially fixedly connected to the reaction tank (1), the discharge pipe (2) is connected to the fixed cylinder (7), the fixed cylinder (7) is provided with a plurality of guide channels (8), the guide channels (8) are used to connect the fixed cylinder (7) and the reaction tank (1), and the discharge pipe (2) transports activated sludge and sewage to the fixed cylinder (7); A first guide member (13) is fixedly connected to the upper side of the fixed cylinder (7), a truncated cone groove is arranged in the first guide member (13), the truncated cone groove in the first guide member (13) is communicated with the fixed cylinder (7), the first guide member (13) is fixedly connected with a first material guide member (14) and a second material guide member (15) in an annular array and both communicated with the truncated cone groove in the first guide member (13), the first material guide member (14) in the annular array and the second material guide member (15) in the annular array are staggered, and the first material guide member (14) and the second material guide member (15) are both provided with discharge ports arranged in a linear array; Two groups of second baffles (16) in a ring-shaped and linear array are fixedly connected to one side of the first guide member (13) facing the inside of the reaction pool (1), wherein the number of the second baffles (16) in one group is the same as the number of the first material guide members (14), and the second baffles (16) in this group respectively cover and cooperate with adjacent material outlets on adjacent first material guide members (14); and the number of the second baffles (16) in the other group is the same as the number of the second material guide members (15), and the second baffles (16) in this group respectively cover and cooperate with adjacent material outlets on adjacent second material guide members (15); A material guide shell (19) is fixedly connected to a side of the first guide member (13) away from the fixed cylinder (7), the material guide shell (19) is connected to a truncated cone-shaped groove in the first guide member (13), and the material guide shell (19) is fixedly connected to and connected to a second material guide tube (20) in an annular array and fixedly connected to the outer side surface of the first guide member (13); It also includes a rotating member (21), the rotating member (21) is rotatably connected to the fixed cylinder (7), a torsion spring is arranged between the rotating member (21) and the fixed cylinder (7), the rotating member (21) is fixedly connected to a spiral shell (22) in an annular array, the spiral shells (22) in the annular array are all slidably matched with the fixed cylinder (7), a third material guide member (23) is fixedly connected to the side of the spiral shell (22) away from the rotating member (21), the cross-section of the third material guide member (23) close to the adjacent spiral shell (22) is C-shaped, the size of the C-shaped cross-section of the third material guide member (23) close to the adjacent spiral shell (22) is inconsistent with the size away from the spiral shell (22), and the spiral shell (22) is provided with a feed port; The fixed cylinder (7) is fixedly connected to a ring-shaped array of fixed rods (24) which are all fixedly connected to the reaction pool (1); the fixed rods (24) are twisted; a slider (25) which is fixedly connected to an adjacent third material guide member (23) is slidably connected to the fixed rods (24); a ring-shaped array of rope collectors (26) is arranged in the reaction pool (1); the rope collectors (26) are fixedly connected to adjacent sliders (25).

2. A sewage treatment equipment for domestic wastewater according to claim 1, characterized in that: The fixed cylinder (7) is fixedly connected to a first baffle (9) at a position close to the material guiding channel (8).

3. A sewage treatment equipment for domestic wastewater according to claim 2, characterized in that: A fixing member (10) is fixedly connected inside the fixing cylinder (7), the fixing member (10) is fixedly connected to a guide plate (11) in an annular array, and a plurality of groups of V-shaped plates (12) in an annular and linear array are fixedly connected to one side of the fixing member (10) close to the discharge pipe (2).

4. A sewage treatment equipment for domestic wastewater according to claim 3, characterized in that: A second guide member (17) in an annular array and located in an inner truncated cone-shaped groove of the first guide member (13) is fixedly connected therein, and the cross section of the second guide member (17) is triangular. A third guide member (18) fixed to the first guide member (13) is fixedly connected to a side of the fixed cylinder (7) close to the first guide member (13), and the cross section of the third guide member (18) is triangular. An inclined surface is provided on a side of the first guide member (13) close to the third guide member (18), and all the second baffles (16) are located on the inclined surface of the first guide member (13).

5. A sewage treatment equipment for domestic wastewater according to claim 4, characterized in that: The fixed cylinder (7) is fixedly connected to a third baffle plate (27) in an annular array, and the third baffle plate (27) is located on the fixed cylinder (7) at a position close to the adjacent third material guide member (23).

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