A treatment device and method for urban domestic sewage

Abstract

This invention discloses a treatment device and method for urban domestic sewage. The device includes a reaction cylinder, an inlet pipe for injecting water into the reaction cylinder, an outlet pipe for discharging water from the reaction cylinder, a sewage outlet on the reaction cylinder, a first dosing unit at the bottom of the reaction cylinder, and a second dosing unit mounted on the first dosing unit. By placing both the first and second dosing units at the bottom of the reaction cylinder, the device allows residual chemicals to directly contact the sewage, preventing them from dripping into the treated sewage. Furthermore, the device's drive nozzles, by controlling their operating states on different mounting bases, can adjust the rotation of the rotating shaft, enabling the chemicals to combine with the sewage more quickly.

Description

Technical Field

[0001] This invention relates to a wastewater treatment device, specifically a device for treating urban domestic wastewater, and relates to the technical field of domestic wastewater treatment. Background Technology

[0002] Urban domestic sewage mainly consists of wastewater generated from various kitchen, washing, and toilet uses in daily life, and is mostly composed of non-toxic inorganic salts. Wastewater generated during human daily life is one of the major sources of water pollution, therefore, sewage treatment is necessary.

[0003] However, existing wastewater treatment devices still have some problems. In order to remove excess elements from the water, a certain amount of reagent needs to be added to the reaction tank used to store the wastewater during the treatment process. The added reagent can reduce the elements in the wastewater and ensure that it meets the discharge standards. However, most of the existing reagent dosing nozzles are set above the wastewater level. As a result, some reagent will remain at the nozzle outlet during the dosing process. Since the amount and dosage of reagent to be added are different, multiple nozzles are set. Therefore, after the wastewater treatment is completed, the reagent at the nozzle will drip into the treated wastewater. Although the amount of reagent dripped in is small, it will cause secondary pollution of the wastewater and lead to the failure of the previous wastewater treatment work.

[0004] Therefore, how to prevent residual chemicals from the nozzles from dripping into the treated wastewater is a problem that needs to be solved. Summary of the Invention

[0005] Purpose of the invention: To provide a treatment device for urban domestic sewage to solve the above-mentioned problems existing in the prior art.

[0006] Technical solution: A treatment device for urban domestic sewage, comprising:

[0007] The reaction cylinder includes an inlet pipe for injecting water into the cylinder, an outlet pipe for discharging water from the cylinder, a drain outlet on the reaction cylinder, a first dosing unit at the bottom of the reaction cylinder, and a second dosing unit installed on the first dosing unit.

[0008] At least during the dosing process, the first dosing unit and the second dosing unit come into contact with the sewage and add a predetermined dose of reagent to the sewage, thereby completing the purification treatment of the sewage in the reaction tank.

[0009] In a further embodiment, the first dosing unit includes a rotating shaft movably connected to the bottom of the reaction cylinder, at least four mounting seats disposed on the surface of the rotating shaft, a plurality of drive nozzles disposed on the mounting seats, and a first nozzle disposed between adjacent drive nozzles.

[0010] The mounting base is spiral-shaped and is coiled on the outer surface of the rotating shaft;

[0011] The drive nozzle is connected to the gas generator via a connecting pipe;

[0012] The first nozzle and the mounting base are both provided with a predetermined angle;

[0013] The angle between the drive nozzle located at the same position on adjacent mounting seats and the tangent direction of the mounting seat is the same, and the perpendicular line of the tangent direction of the mounting seat is the angle bisector of the angle formed by the extension lines of the two mounting seats.

[0014] During operation, the drive nozzles on the two spaced-apart mounting bases can drive the rotating shaft to rotate clockwise, while the drive nozzles on the remaining mounting bases can drive the rotating shaft to rotate counterclockwise.

[0015] The gas generator can produce an airflow at a predetermined speed and spray it out from the drive nozzle through a connecting pipe; during the dosing process, it can rotate to ensure that the agent and the sewage are fully mixed, thus ensuring the smooth progress of sewage treatment.

[0016] In a further embodiment, a connecting seat is provided on the other end of the rotating shaft, a plurality of support seats are provided around the connecting seat, a second nozzle is provided on the support seat, and a plurality of third nozzles are provided on the bottom surface of the connecting seat.

[0017] There is a predetermined angle between the second nozzle and the rotating shaft;

[0018] The distance between each third nozzle and the center of the bottom surface is the same;

[0019] The first, second, and third nozzles have the same structure and are used to add chemicals to the sewage in the cylinder. They are connected to the injection device through pipes.

[0020] The injection device is used to inject the medicine into the cylinder at a predetermined speed through the first nozzle, the second nozzle and the third nozzle;

[0021] The injection device has the same structure as the drug input device; the first nozzle, second nozzle and third nozzle are provided to ensure the smooth progress of drug addition.

[0022] In a further embodiment, the first nozzle includes a nozzle body disposed on the mounting base, a third limiting block disposed on the nozzle body for blocking the nozzle outlet, and a plurality of elastic members disposed in the circumferential direction of the third limiting block.

[0023] The other end of the elastic element is disposed on the nozzle body; upon entry, it will collide with the third limiting block, thereby causing the agent to splash, increasing its contact area with the sewage, and thus increasing the reaction efficiency of the agent.

[0024] In a further embodiment, the second dosing unit includes a protective cover disposed on the bottom surface of the rotating shaft, a connector disposed on the protective cover, a drive part disposed on the connector, a plurality of transmission parts disposed in the circumferential direction of the connector, a fourth nozzle connected to the transmission parts, and a limiting plate disposed on the connector.

[0025] One end of the transmission part abuts against the drive part, and the other end passes through the connector and the protective cover in sequence;

[0026] The limiting plate is located outside the protective cover;

[0027] When in operation, the fourth nozzle and the limiting plate are located in the sewage.

[0028] In a further embodiment, the driving unit includes a base, a driving motor disposed on the base, a driving gear connected to the output end of the driving motor, a transmission gear meshing with the driving gear and movably connected to the base, a driving block connected to the transmission gear, a driven shaft disposed on the transmission gear, and a bearing sleeved on the driven shaft.

[0029] The drive block is provided with at least one protrusion, and the transmission part abuts against the drive block;

[0030] The inner ring of the bearing abuts against the driven shaft, and the outer ring of the bearing is located on the connecting member; different agents can be injected according to the content of trace elements remaining in the sewage, thereby enabling different methods to be used for adding agents to different types of sewage.

[0031] In a further embodiment, the transmission part includes a first support disposed on the connector, a support rod movably connected to the first support, a second support disposed at one end of the support rod, a drive wheel located on the second support, and a first spring disposed between the first support and the second support.

[0032] The drive wheel abuts against the drive block.

[0033] In a further embodiment, the fourth nozzle includes a tube body connected to the support rod, a discharge pipe connected to the tube body, a second limiting block disposed at the other end of the discharge pipe, and an abutment block that abuts against the protective cover and is sleeved on the discharge pipe.

[0034] The discharge pipe is provided with multiple discharge ports on its side;

[0035] When not in operation, the contact block abuts against the discharge port, thus preventing the fourth nozzle from adding chemicals to the wastewater.

[0036] In operation, driven by the drive unit, the discharge pipe disengages from the abutment block, and the agent flows out from the discharge port on the side of the discharge pipe, reacting with impurities in the wastewater. Operators can select the appropriate position and number of drive units as needed to complete the wastewater treatment work and ensure that the treated wastewater meets the predetermined standards.

[0037] In a further embodiment, the fourth nozzle further includes a limiting seat disposed on the protective cover, a first limiting block sleeved on the discharge pipe, and a second spring sleeved on the discharge pipe;

[0038] One end of the second spring abuts against the first limiting block, and the other end is connected to the abutment block;

[0039] The limiting seat also has a certain clearance reserved for the first limiting block to move axially upward in the discharge pipe;

[0040] The fourth nozzle is connected to the drug input device via an infusion pipe; through the cooperation of the first and second springs, the second limiting block and the abutment block can contact each other during non-drug injection processes, thereby preventing sewage from entering; the drug injected from the discharge pipe also has a certain flow rate.

[0041] A treatment method for urban domestic sewage based on the above-mentioned urban domestic sewage treatment device includes the following steps:

[0042] S1: When it is necessary to treat urban domestic sewage, the treatment plant will first use a filter screen or other device to remove solid particles from the sewage, and then the filtered sewage will be introduced into the inlet pipe. Then, the operator will add a predetermined dose of agent to the sewage to remove excess elements from the sewage.

[0043] S2: During the dosing process, the first nozzle, the second nozzle, and the third nozzle normally perform the dosing operation. Because the dosing device causes the dosing agent to move at a predetermined speed, the dosing agent will impact the third limiting block. This will not only cause the dosing agent to splash, but also cause the third limiting block to separate from the nozzle body. As a result, the dosing agent will flow into the sewage from the nozzle body in a splashing manner, thus completing the initial dosing of the sewage.

[0044] S3: From before the dosing process until the end of the dosing process, the gas generator works continuously, which enables the drive nozzles on the non-adjacent mounting bases to spray airflow at a predetermined speed. Since there is a predetermined angle between the drive nozzles and the mounting bases, and they are spirally mounted on the surface of the rotating shaft, the rotating shaft can be driven to rotate, which can generate vortices in the sewage and make the agent mix with the sewage more quickly. After the rotating shaft has rotated for a predetermined time, the drive nozzles stop working, and the non-working mounting base drive nozzles start working, which causes the rotating shaft to move in the opposite direction, thus facilitating the mixing of the agent and the sewage.

[0045] S4: After the initial dosing of chemicals into the sewage is completed, the injection device stops working. Then, under the action of the elastic element, the third limit block can be made to fit with the nozzle body, and the first nozzle, the second nozzle and the third nozzle stop dosing chemicals into the sewage.

[0046] S5: When the first, second, and third nozzles stop dispensing chemicals into the sewage, the drive motor starts working. The moving drive motor drives the drive gear to rotate, which in turn drives the transmission gear to rotate. The transmission gear then drives the drive block to move, which in turn causes the protrusion to move circumferentially around the connector, allowing the protrusion to contact one of the transmission parts, thus completing the driving operation of the transmission part.

[0047] S6: When the transmission part abuts against the protrusion, the protrusion enables the drive wheel to move in the direction of the discharge pipe axis, which in turn drives the first support to start moving. The moving first support drives the support rod to start moving, and the moving support rod drives the pipe body to start working. The moving pipe body drives the discharge pipe to start working, and the second limiting block disengages from the abutment block. Then the discharge port on the side of the discharge pipe disengages from the abutment block, and the agent input device performs secondary dosing to the sewage through the infusion pipe.

[0048] S7: After the second dosing is completed, under the movement of the drive unit, the protrusion block and the drive wheel move away from each other. Then, with the cooperation of the first spring and the second spring, the second limit block abuts against the abutting block. Then, the discharge port on the side of the discharge pipe is located inside the abutting block. Then, this transmission unit stops the dosing operation. Under the operation of the drive unit, another transmission unit can perform the dosing operation. This allows different types of agents to be injected into the sewage. In the sewage treatment process, the number of transmission units can be determined by the user and can be selected according to the needs.

[0049] S8: After the chemical input is completed, the input chemical will react with the trace elements in the wastewater, and then the treated wastewater will be discharged from the outlet pipe.

[0050] Beneficial effects: This invention discloses a treatment device for urban domestic sewage. To prevent residual chemicals from dripping into the treated sewage, the device places both the first and second dosing units at the bottom of the reaction cylinder, allowing the residual chemicals to directly contact the sewage and preventing them from dripping into the treated sewage. Simultaneously, the device's drive nozzles, by controlling their operating states on different mounting bases, can adjust the rotation of the rotating shaft, creating a vortex in the center of the sewage. This allows the chemicals to combine with the sewage more quickly, accelerating the reaction between the chemicals and the sewage, thus completing the sewage treatment process and ensuring that the sewage meets predetermined discharge standards. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the structure of the present invention.

[0052] Figure 2 This is a schematic diagram of the first drug delivery unit of the present invention.

[0053] Figure 3 This is a schematic diagram of the rotating shaft of the present invention.

[0054] Figure 4 This is a schematic diagram of the nozzle body of the present invention.

[0055] Figure 5 This is a schematic diagram of the second drug delivery unit of the present invention.

[0056] Figure 6 This is a schematic diagram of the transmission part of the present invention.

[0057] Figure 7 This is a schematic diagram of the fourth nozzle of the present invention.

[0058] The attached figures are labeled as follows: reaction cylinder 1, inlet pipe 2, outlet pipe 3, first dosing unit 4, rotating shaft 41, mounting base 42, connecting base 43, drive nozzle 44, first nozzle 45, second nozzle 46, third nozzle 47, support base 48, third limiting block 49, elastic element 410, second dosing unit 5, connecting element 51, transmission part 52, drive wheel 521, first support 522, second support 523, support rod 524, first spring 525, fourth nozzle 53, pipe body 531, limiting base 532, discharge pipe 533, first limiting block 534, abutment block 535, second limiting block 536, second spring 537, limiting plate 54, drive part 55, drive motor 551, drive gear 552, transmission gear 553, driven shaft 555, drive block 556, base 56, protective cover 57. Detailed Implementation

[0059] The applicant's research and analysis revealed that the problem (chemicals at the nozzles dripping into the treated wastewater, causing secondary pollution) arises because, in order to remove excess elements from the water, a certain amount of chemicals needs to be added to the reaction tank used to store the wastewater during the treatment process. These chemicals reduce the elemental levels in the wastewater, ensuring it meets discharge standards. However, most existing chemical dosing nozzles are positioned above the wastewater level, causing some chemicals to remain at the nozzle outlet during dosing. Since the required amount and dosage of chemicals vary, multiple nozzles are used. Therefore, after the wastewater treatment is complete, the chemicals at the nozzles drip into the treated wastewater. Although... However, even if the dosage of the added agent is insufficient, it can cause secondary pollution of the wastewater, leading to the failure of the previous wastewater treatment work. To prevent residual agent from the nozzle from dripping into the treated wastewater, this invention places both the first and second dosing units at the bottom of the reaction cylinder, allowing the residual agent to directly contact the wastewater and preventing it from dripping into the treated wastewater. Simultaneously, the drive nozzle in this device, by controlling the working state of the drive nozzles located on different mounting bases, can adjust the rotation of the rotating shaft, thereby creating a vortex in the center of the wastewater. This allows the agent to combine with the wastewater more quickly, accelerating the reaction speed between the agent and the wastewater, thus completing the wastewater treatment work and enabling the wastewater to meet the predetermined discharge standards.

[0060] A wastewater treatment device for urban domestic sewage includes: a reaction cylinder 1, an inlet pipe 2, an outlet pipe 3, a first dosing unit 4, a rotating shaft 41, a mounting base 42, a connecting base 43, a drive nozzle 44, a first nozzle 45, a second nozzle 46, a third nozzle 47, a support base 48, a third limiting block 49, an elastic element 410, a second dosing unit 5, a connecting element 51, a transmission part 52, a drive wheel 521, a first support 522, a second support 523, a support rod 524, a first spring 525, a fourth nozzle 53, a pipe body 531, a limiting base 532, a discharge pipe 533, a first limiting block 534, an abutment block 535, a second limiting block 536, a second spring 537, a limiting plate 54, a drive part 55, a drive motor 551, a drive gear 552, a transmission gear 553, a driven shaft 555, a drive block 556, a base 56, and a protective cover 57.

[0061] This device includes a reaction cylinder 1, an inlet pipe 2 for injecting water into the reaction cylinder 1, an outlet pipe 3 for discharging water from the reaction cylinder 1, a drain outlet on the reaction cylinder 1, a first dosing unit 4 at the bottom of the reaction cylinder 1, and a second dosing unit 5 mounted on the first dosing unit 4. At least during the dosing process, the first dosing unit 4 and the second dosing unit 5 come into contact with the wastewater and inject a predetermined dose of reagent into the wastewater, thereby completing the purification treatment of the wastewater in the reaction cylinder 1. Unit 4 and the second dosing unit 5 are both placed at the bottom of the reaction cylinder 1, so that the residual agent can directly contact the sewage and will not drip into the treated sewage. At the same time, the drive nozzle 44 in this device can adjust the rotation of the rotating shaft 41 by controlling the working state of the drive nozzle 44 located on different mounting seats 42, so that a vortex can be formed in the center of the sewage, so that the agent can combine with the sewage more quickly, thereby accelerating the reaction speed between the agent and the sewage, and completing the sewage treatment work so that the sewage can meet the predetermined discharge standards.

[0062] The first dosing unit 4 includes a rotating shaft 41 movably connected to the bottom of the reaction cylinder 1, at least four mounting seats 42 disposed on the surface of the rotating shaft 41, a plurality of drive nozzles 44 disposed on the mounting seats 42, and a first nozzle 45 disposed between adjacent drive nozzles 44; the mounting seats 42 are spirally shaped and coiled on the outer surface of the rotating shaft 41; wherein the drive nozzles 44 are connected to the gas generator via connecting pipes; a predetermined angle is provided between the first nozzles 45 and the mounting seats 42; the angle between the drive nozzles 44 located at the same position on adjacent mounting seats 42 and the tangent direction of the mounting seat 42 is the same, and the perpendicular line of the tangent direction of the mounting seat 42 is the angle bisector of the angle formed by the extension lines of the two mounting seats 42; during operation, the drive nozzles 44 on two spaced-apart mounting seats 42 can drive the rotating shaft 41 to rotate clockwise, and the drive nozzles 44 on the remaining mounting seats 42 can drive the rotating shaft 41 to rotate counterclockwise; from before dosing until the end of dosing, the gas generator operates continuously, thereby enabling The drive nozzle 44 on the non-adjacent mounting base 42 ejects an airflow with a predetermined speed. Since there is a predetermined angle between the drive nozzle 44 and the mounting base 42, and it is spirally mounted on the surface of the rotating shaft 41, it can drive the rotating shaft 41 to rotate, thereby creating a vortex in the sewage and allowing the agent to mix with the sewage more quickly. After the rotating shaft 41 has rotated for a predetermined time, the drive nozzle 44 stops working, and the non-working mounting base 42 drives the drive nozzle 44 to start working, thereby causing the rotating shaft 41 to move in the opposite direction, which facilitates the mixing of the agent and the sewage. The high-speed gas ejected from the drive nozzle 44 can drive the rotating shaft 41 to rotate, thereby creating a vortex in the sewage, which facilitates the thorough mixing of the agent and the sewage. At the same time, oxygen can be introduced into the sewage through the drive nozzle 44, which can enable microorganisms in the sewage to degrade impurities in the sewage. By controlling the working state of the drive nozzle 44, the rotation mode of the rotating shaft 41 can be adjusted, which facilitates the mixing of the agent.

[0063] The other end of the rotating shaft 41 is also provided with a connecting seat 43, a plurality of support seats 48 arranged around the connecting seat 43, a second nozzle 46 arranged on the support seat 48, and a plurality of third nozzles 47 arranged on the bottom surface of the connecting seat 43; wherein the second nozzle 46 has a predetermined angle with the rotating shaft 41; each third nozzle 47 is equidistant from the center of the bottom surface; the first nozzle 45, the second nozzle 46, and the third nozzle 47 have the same structure and are used to add chemicals to the sewage in the cylinder, and are connected to the injection device through a pipe; when it is necessary to treat urban domestic sewage, the treatment plant will first use a filter screen or other device to remove solid particles from the sewage, and then pass the filtered sewage into the inlet pipe 2, and then the operator will add a predetermined dose of chemicals to the sewage to remove excess elements in the sewage; during the dosing process, the first nozzle 45, the second nozzle 46, and the third nozzle 47 normally perform the chemical injection process. The injection device causes the agent to move at a predetermined speed, which in turn impacts the third limiting block 49. This not only causes the agent to splash but also causes the third limiting block 49 to detach from the nozzle body. The agent then flows into the wastewater from the nozzle body in a splashing manner, completing the initial dosing of the wastewater. After the initial dosing, the injection device stops working, and the elastic element 410 allows the third limiting block 49 to adhere to the nozzle body, thus stopping the first nozzle 45, second nozzle 46, and third nozzle 47 from dosing the wastewater. Through the cooperation of the multiple nozzles and the rotating shaft 41, rotation is possible during the dosing process, ensuring thorough mixing of the agent and wastewater and guaranteeing smooth wastewater treatment. Simultaneously, the third limiting block 49 prevents wastewater from entering the first nozzle 45, second nozzle 46, and third nozzle 47.

[0064] The first nozzle 45 includes a nozzle body disposed on the mounting base 42, a third limiting block 49 disposed on the nozzle body for blocking the nozzle outlet, and a plurality of elastic members 410 disposed on the third limiting block 49 in the circumferential direction; the other end of the elastic member 410 is disposed on the nozzle body; by the high-speed moving agent impacting the third limiting block 49, the third limiting block 49 is moved away from the nozzle body, and the agent can enter the reaction cylinder 1. At the same time, when entering, it will collide with the third limiting block 49, thereby splashing the agent, increasing its contact area with the sewage, and thus increasing the reaction efficiency of the agent.

[0065] The second dosing unit 5 includes a protective cover 57 disposed on the bottom surface of the rotating shaft 41, a connector 51 disposed on the protective cover 57, a drive part 55 disposed on the connector 51, a plurality of transmission parts 52 disposed in the circumferential direction of the connector 51, a fourth nozzle 53 connected to the transmission parts 52, and a limiting plate 54 disposed on the connector 51; one end of the transmission part 52 abuts against the drive part 55, and the other end passes through the connector 51 and the protective cover 57 in sequence; the limiting plate 54... 4 is located outside the protective cover 57; in the working state, the fourth nozzle 53 and the limiting plate 54 are located in the sewage; the drive unit 55 includes a base 56, a drive motor 551 mounted on the base 56, a drive gear 552 connected to the output end of the drive motor 551, a transmission gear 553 meshing with the drive gear 552 and movably connected to the base 56, a drive block 556 connected to the transmission gear 553, a driven shaft 555 mounted on the transmission gear 553, and a sleeve The driven shaft 555 has a bearing; the drive block 556 has at least one protrusion, and the transmission part 52 abuts against the drive block 556; the inner ring of the bearing abuts against the driven shaft 555, and the outer ring of the bearing is located on the connecting member 51; when the first nozzle 45, the second nozzle 46, and the third nozzle 47 stop adding chemicals to the sewage, the drive motor 551 starts working, and the moving drive motor 551 drives the drive gear 552 to start rotating, and then the moving drive gear 552 drives the transmission gear 553 to start rotating, and then the moving transmission gear 553 drives the drive block 556 to start moving, and then the moving drive block 556 causes the protrusion to move upward around the connecting member 51, and then the protrusion abuts against one of the transmission parts 52, thereby completing the driving work of the transmission part 52; different agents can be injected according to the content of trace elements remaining in the sewage, and different methods can be used to add agents to different types of sewage.

[0066] The transmission unit 52 includes a first support 522 disposed on the connector 51, a support rod 524 movably connected to the first support 522, a second support 523 disposed at one end of the support rod 524, a drive wheel 521 located on the second support 523, and a first spring 525 disposed between the first support 522 and the second support 523; the drive wheel 521 abuts against the drive block 556; the fourth nozzle 53 includes a tube body 531 connected to the support rod 524, a discharge pipe 533 connected to the tube body 531, a second limiting block 536 disposed at the other end of the discharge pipe 533, and an abutment block abutting against the protective cover 57 and sleeved on the discharge pipe 533. 535; The discharge pipe 533 has multiple discharge ports on its side; In the non-working state, the abutment block 535 abuts against the discharge ports, so the fourth nozzle 53 cannot add chemicals to the sewage; In the working state, driven by the drive unit 55, the discharge pipe 533 is disengaged from the abutment block 535, and the chemicals flow out from the discharge ports on the side of the discharge pipe 533 and react with impurities in the sewage; The fourth nozzle 53 also includes a limiting seat 532 on the protective cover 57, a first limiting block 534 sleeved on the discharge pipe 533, and a second spring 537 sleeved on the discharge pipe 533; One end of the second spring 537 abuts against the first limiting block 534, and the other end is connected to the abutment block 535. The limiting seat 532 also has a certain clearance reserved for the first limiting block 534 to move axially in the discharge pipe 533; the fourth nozzle 53 is connected to the drug input device through the infusion pipe; when the transmission part 52 abuts against the protrusion, the protrusion can cause the drive wheel 521 to move in the axial direction of the discharge pipe 533, which in turn can drive the first support 522 to start moving, and the moving first support 522 can drive the support rod 524 to start moving, and then the moving support rod 524 can drive the pipe body 531 to start working, and then the moving pipe body 531 can drive the discharge pipe 533 to start working, and then the second limiting block 536 disengages from the abutment block 535, and then the discharge port on the side of the discharge pipe 533 opens from the discharge pipe 533. The abutment block 535 disengages, and the agent input device then performs a secondary dosing operation into the sewage through the infusion pipe. After the secondary dosing is completed, under the movement of the drive unit 55, the protrusion block and the drive wheel 521 move away from each other. Then, with the cooperation of the first spring 525 and the second spring 537, the second limit block 536 abuts against the abutment block 535, and the discharge port on the side of the discharge pipe 533 is located inside the abutment block 535. Then, this transmission unit 52 stops the dosing operation. Under the operation of the drive unit 55, another transmission unit 52 can perform the dosing operation, so that different types of agents can be injected into the sewage. In the sewage treatment process, the number of transmission units 52 can be determined by the user and can be selected according to the needs.After the chemical is added, it reacts with trace elements in the wastewater, and the treated wastewater is discharged from the outlet pipe 3. During the injection process, the chemical sprayed from the fourth nozzle 53 has a certain velocity, which causes relative displacement between the discharge pipe 533 and the abutment block 535, allowing the chemical to be injected into the reaction cylinder 1. After the injection is completed, the protrusion and the drive wheel 521 move away from each other, and under the action of two springs, the outlet of the discharge pipe 533 retracts into the abutment block 535, thus preventing wastewater from entering the discharge pipe 533, thereby completing the secondary chemical addition to the wastewater in the reaction cylinder 1. At the same time, the operator can select the appropriate position and number of transmission parts 52 as needed to complete the wastewater treatment and ensure that the treated wastewater meets the predetermined standards. Both the waterproof cover and the abutment block 535 have a certain waterproof function.

[0067] Working principle explanation: When treating urban domestic sewage, the treatment plant first uses filters or other devices to remove solid particles from the sewage. Then, the filtered sewage is introduced into inlet pipe 2. Operators then add a predetermined dosage of chemicals to the sewage to remove excess elements. During the dosing process, the first nozzle 45, second nozzle 46, and third nozzle 47 inject chemicals normally. Because the injection device causes the chemicals to move at a predetermined speed, they impact the third limiting block 49. This not only causes the chemicals to splash but also causes the third limiting block 49 to detach from the nozzle body, allowing the chemicals to flow into the sewage from the nozzle body via splashing. This completes the initial dosing of chemicals into the wastewater. From the start of dosing until its completion, the gas generator operates continuously, causing the drive nozzles 44 on the non-adjacent mounting bases 42 to spray airflow at a predetermined speed. Because the drive nozzles 44 and mounting bases 42 are at a predetermined angle and are spirally mounted on the surface of the rotating shaft 41, they drive the rotating shaft 41 to rotate, creating a vortex in the wastewater and facilitating faster mixing of the chemicals. After the rotating shaft 41 has rotated for a predetermined time, the drive nozzles 44 cease operation, while the previously inactive mounting bases 42 begin operating, causing the rotating shaft 41 to reverse its movement, thus facilitating the mixing of the chemicals and wastewater. This completes the initial dosing of chemicals into the wastewater. After the medication is dispensed, the injection device stops working. Under the action of the elastic element 410, the third limiting block 49 is brought into contact with the nozzle body, thus stopping the first nozzle 45, second nozzle 46, and third nozzle 47 from dispensing medication into the sewage. Once the first nozzle 45, second nozzle 46, and third nozzle 47 have stopped dispensing medication into the sewage, the drive motor 551 starts working. The moving drive motor 551 drives the drive gear 552 to rotate, which in turn drives the transmission gear 553 to rotate. The transmission gear 553 then drives the drive block 556 to move, causing the protrusion to move upwards around the connector 51. The protrusion can abut against one of the transmission parts 52, thereby driving the transmission part 52. When the transmission part 52 abuts against the protrusion, the protrusion can cause the drive wheel 521 to move in the axial direction of the discharge pipe 533, thereby driving the first support 522 to start moving. The moving first support 522 can drive the support rod 524 to start moving. The moving support rod 524 can drive the pipe body 531 to start working. The moving pipe body 531 can drive the discharge pipe 533 to start working. Then the second limiting block 536 disengages from the abutment block 535, and the discharge port on the side of the discharge pipe 533 disengages from the abutment block 535. Then the drug input device performs secondary drug delivery to the sewage through the infusion pipe.After the second dosing is completed, under the movement of the drive unit 55, the protrusion and the drive wheel 521 move away from each other. Then, with the cooperation of the first spring 525 and the second spring 537, the second limiting block 536 abuts against the abutting block 535, and the discharge port on the side of the discharge pipe 533 is positioned inside the abutting block 535. This transmission unit 52 then stops the dosing operation. Under the operation of the drive unit 55, another transmission unit 52 can then perform the dosing operation, allowing different types of chemicals to be injected into the wastewater. The number of transmission units 52 can be determined automatically during wastewater treatment, and can be selected according to needs. After the chemical dosing is completed, the added chemicals react with trace elements in the wastewater, and then the treated wastewater is discharged from the outlet pipe 3.

[0068] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A device for treating urban domestic sewage, characterized in that, include: The reaction cylinder includes an inlet pipe for injecting water into the cylinder, an outlet pipe for discharging water from the cylinder, a drain outlet on the reaction cylinder, a first dosing unit at the bottom of the reaction cylinder, and a second dosing unit installed on the first dosing unit. At least during the dosing process, the first dosing unit and the second dosing unit come into contact with the sewage and add a predetermined dose of agent to the sewage, thereby completing the purification treatment of the sewage in the reaction tank. The first dosing unit includes a rotating shaft movably connected to the bottom of the reaction tank, at least four mounting seats on the surface of the rotating shaft, a plurality of drive nozzles on the mounting seats, and a first nozzle disposed between adjacent drive nozzles. The mounting base is spiral-shaped and is coiled on the outer surface of the rotating shaft; The drive nozzle is connected to the gas generator via a connecting pipe; The first nozzle and the mounting base are both provided with a predetermined angle; The angle between the drive nozzle located at the same position on adjacent mounting seats and the tangent direction of the mounting seat is the same, and the perpendicular line of the tangent direction of the mounting seat is the angle bisector of the angle formed by the extension lines of the two mounting seats. During operation, the drive nozzles on the two spaced-apart mounting bases can drive the rotating shaft to rotate clockwise, while the drive nozzles on the remaining mounting bases can drive the rotating shaft to rotate counterclockwise.

2. The urban domestic sewage treatment device according to claim 1, characterized in that: The other end of the rotating shaft is also provided with a connecting seat, a plurality of support seats in the circumferential direction of the connecting seat, a second nozzle on the support seat, and a plurality of third nozzles on the bottom surface of the connecting seat; There is a predetermined angle between the second nozzle and the rotating shaft; The distance between each third nozzle and the center of the bottom surface is the same; The first, second, and third nozzles have the same structure and are used to add chemicals to the sewage in the cylinder. They are connected to the injection device through pipes.

3. The urban domestic sewage treatment device according to claim 2, characterized in that: The first nozzle includes a nozzle body disposed on the mounting base, a third limiting block disposed on the nozzle body for blocking the nozzle outlet, and a plurality of elastic members disposed in the circumferential direction of the third limiting block. The other end of the elastic element is disposed on the nozzle body.

4. The urban domestic sewage treatment device according to claim 1, characterized in that: The second dosing unit includes a protective cover disposed on the bottom surface of the rotating shaft, a connector disposed on the protective cover, a drive unit disposed on the connector, a plurality of transmission units disposed in the circumferential direction of the connector, a fourth nozzle connected to the transmission units, and a limiting plate disposed on the connector. One end of the transmission part abuts against the drive part, and the other end passes through the connector and the protective cover in sequence. The limiting plate is located outside the protective cover; When in operation, the fourth nozzle and the limiting plate are located in the sewage.

5. A municipal sewage treatment device according to claim 4, characterized in that: The drive unit includes a base, a drive motor mounted on the base, a drive gear connected to the output end of the drive motor, a transmission gear meshing with the drive gear and movably connected to the base, a drive block connected to the transmission gear, a driven shaft mounted on the transmission gear, and a bearing sleeved on the driven shaft. The drive block is provided with at least one protrusion, and the transmission part abuts against the drive block; The inner ring of the bearing abuts against the driven shaft, and the outer ring of the bearing is located on the connecting member.

6. A municipal sewage treatment device according to claim 5, characterized in that: The transmission unit includes a first support on the connector, a support rod movably connected to the first support, a second support at one end of the support rod, a drive wheel on the second support, and a first spring between the first support and the second support. The drive wheel abuts against the drive block.

7. A municipal sewage treatment device according to claim 6, characterized in that: The fourth nozzle includes a tube body connected to the support rod, a discharge pipe connected to the tube body, a second limiting block located at the other end of the discharge pipe, and an abutment block that abuts against the protective cover and is sleeved on the discharge pipe. The discharge pipe is provided with multiple discharge ports on its side; When not in operation, the contact block abuts against the discharge port, thus preventing the fourth nozzle from adding chemicals to the wastewater. In operation, driven by the drive unit, the discharge pipe is disengaged from the abutment block, and the agent flows out from the discharge port on the side of the discharge pipe and reacts with impurities in the wastewater.

8. A municipal sewage treatment device according to claim 7, characterized in that: The fourth nozzle also includes a limiting seat disposed on the protective cover, a first limiting block sleeved on the discharge pipe, and a second spring sleeved on the discharge pipe; One end of the second spring abuts against the first limiting block, and the other end is connected to the abutment block; The limiting seat also has a certain clearance reserved for the first limiting block to move axially upward in the discharge pipe; The fourth nozzle is connected to the drug delivery device via an infusion tube.

9. A method for treating urban domestic sewage using the treatment device according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1: When it is necessary to treat urban domestic sewage, the treatment plant will first use a filter screen or other device to remove solid particles from the sewage, and then pass the filtered sewage into the inlet pipe. Then, the operator will add a predetermined dose of agent to the sewage to remove excess elements from the sewage. S2: During the dosing process, the first nozzle, the second nozzle, and the third nozzle normally perform the dosing operation. Because the dosing device causes the dosing agent to move at a predetermined speed, the dosing agent will impact the third limiting block. This will not only cause the dosing agent to splash, but also cause the third limiting block to separate from the nozzle body. As a result, the dosing agent will flow into the sewage from the nozzle body in a splashing manner, thus completing the initial dosing of the sewage. S3: From before the dosing process until the end of the dosing process, the gas generator works continuously, which enables the drive nozzles on the non-adjacent mounting bases to spray airflow at a predetermined speed. Since there is a predetermined angle between the drive nozzles and the mounting bases, and they are spirally mounted on the surface of the rotating shaft, the rotating shaft can be driven to rotate, which can generate vortices in the sewage and make the agent mix with the sewage more quickly. After the rotating shaft has rotated for a predetermined time, the drive nozzles stop working, and the non-working mounting base drive nozzles start working, which causes the rotating shaft to move in the opposite direction, thus facilitating the mixing of the agent and the sewage. S4: After the initial dosing of chemicals into the sewage is completed, the injection device stops working. Then, under the action of the elastic element, the third limit block can be made to fit with the nozzle body, and the first nozzle, the second nozzle and the third nozzle stop dosing chemicals into the sewage. S5: When the first, second, and third nozzles stop dispensing chemicals into the sewage, the drive motor starts working. The moving drive motor drives the drive gear to rotate, which in turn drives the transmission gear to rotate. The transmission gear then drives the drive block to move, which in turn causes the protrusion to move circumferentially around the connector, allowing the protrusion to contact one of the transmission parts, thus completing the driving operation of the transmission part. S6: When the transmission part abuts against the protrusion, the protrusion enables the drive wheel to move in the direction of the discharge pipe axis, which in turn drives the first support to start moving. The moving first support drives the support rod to start moving, and the moving support rod drives the pipe body to start working. The moving pipe body drives the discharge pipe to start working, and the second limiting block disengages from the abutment block. Then the discharge port on the side of the discharge pipe disengages from the abutment block, and the agent input device performs secondary dosing to the sewage through the infusion pipe. S7: After the second dosing is completed, under the movement of the drive unit, the protrusion block and the drive wheel move away from each other. Then, with the cooperation of the first spring and the second spring, the second limit block abuts against the abutting block. Then, the discharge port on the side of the discharge pipe is located inside the abutting block. Then, this transmission unit stops the dosing operation. Under the operation of the drive unit, another transmission unit can perform the dosing operation. This allows different types of agents to be injected into the sewage. In the sewage treatment process, the number of transmission units can be determined by the user and can be selected according to the needs. S8: After the chemical input is completed, the input chemical will react with the trace elements in the wastewater, and then the treated wastewater will be discharged from the outlet pipe.

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