Method and device for treating urea in urban water supply and drainage

Abstract

The invention relates to the technical field of sewage treatment, in particular to a method and device for treating urea in urban water supply and drainage. A supporting frame is fixedly connected with a base and located at the top of the base, a filter shell is fixed to the supporting frame, a first filter screen is arranged at the top of the filter shell, and a liquid inlet pipe is arranged on one side of the filter screen; the cleaning assembly comprises a moving frame, a gear, a rotating roller, a rack, a conveying pipe and a negative pressure pump, the moving frame is arranged in the filtering shell in a sliding mode, the rack is arranged on one side of the moving frame, the gear is rotationally connected with the moving frame and meshed with the rack, the rotating roller is connected with the gear, the conveying pipe is provided with a plurality of feeding ports, and the conveying pipe is fixed to the moving frame and located at the bottom of the rotating roller; the negative pressure pump is communicated with the conveying pipe, the aeration assembly is communicated with the filter shell, and the electrolysis assembly is communicated with the aeration assembly. Therefore, the cleaning time is saved, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a method and a device for treating urea in urban water supply and drainage. Background Art

[0002] Urea treatment in urban water supply and drainage systems is a crucial step, especially for industrial wastewater containing urea and domestic sewage mixed with urea to a certain extent. Urea, as a common nitrogen fertilizer raw material and a by-product of certain industrial chemical processes, is directly discharged into natural water bodies without treatment. It will not only cause eutrophication of water bodies, cause excessive growth of algae, and lead to water quality deterioration, imbalance of aquatic ecosystems, but also pose a threat to human drinking water safety. Therefore, it is particularly important to adopt efficient and specialized treatment processes to purify these sewage.

[0003] However, existing sewage treatment equipment will produce sediment at the bottom of the equipment when treating sewage. The existing method of treating sediment is mainly manual treatment, which reduces the treatment efficiency and increases the labor intensity. Summary of the invention

[0004] The purpose of the present invention is to provide a method and device for treating urea in urban water supply and drainage, so as to more conveniently treat the sediment in the sewage treatment process, thereby saving cleaning time, improving work efficiency, and providing strong technical support for the recycling of urban water resources and environmental protection.

[0005] To achieve the above-mentioned purpose, in a first aspect, the present invention provides a device for treating urea in urban water supply and drainage, comprising a supporting component, a filtering component, a cleaning component, an aeration component and an electrolysis component, wherein the supporting component comprises a base and a supporting frame, wherein the supporting frame is fixedly connected to the base and is located at the top of the base, wherein the filtering component comprises a first filter screen, a filtering shell and a liquid inlet pipe, wherein the filtering shell is fixed to the supporting frame, wherein the first filter screen is arranged at the top of the filtering shell, wherein the liquid inlet pipe is arranged at one side of the filtering screen, wherein the cleaning component comprises a moving frame, a gear, a rotating roller, a rack, a conveying pipe and a negative pressure pump, wherein the moving frame is slidably arranged in the filtering shell, wherein the rack is arranged at one side of the moving frame, wherein the gear is rotatably connected to the moving frame and meshes with the rack, wherein the rotating roller is connected to the gear, wherein the conveying pipe has a plurality of feed ports, wherein the conveying pipe is fixed to the moving frame and is located at the bottom of the rotating roller, wherein the negative pressure pump is communicated with the conveying pipe, wherein the aeration component is communicated with the filtering shell, and wherein the electrolysis component is communicated with the aeration component.

[0006] Wherein, the support assembly further includes an anti-skid pad, which is fixedly connected to the base and located at the bottom of the base.

[0007] Wherein, the filter assembly further includes a cleaner, and the cleaner is slidably arranged on one side of the first filter screen.

[0008] Wherein, the cleaner includes a rotating rod, a second filter, a push block, a cylinder, a connecting block, a first collecting box and a second collecting box. The rotating rod is rotatably connected to the filter shell and is located on one side of the first filter. The second filter is fixed on the rotating rod. The push block is slidably arranged on the rotating rod. The cylinder is rotatably arranged on the support frame. The output end of the cylinder is connected to the push block. The first collecting box and the second collecting box are arranged on both sides of the filter shell.

[0009] Wherein, the filter assembly further comprises a stirring rod and a stirring motor, wherein the stirring rod is rotatably connected to the filter shell and is located inside the filter shell, and the output end of the stirring motor is connected to the stirring rod.

[0010] Wherein, the cleaner further comprises a return spring, and the return spring is arranged between the cylinder and the connecting block.

[0011] Wherein, the aeration assembly includes an aeration tank and a window, and the window is arranged on one side of the aeration tank.

[0012] Wherein, the electrolytic assembly comprises an electrolytic cell and an ultraviolet irradiation lamp, and the ultraviolet irradiation lamp is arranged on the top of the electrolytic cell.

[0013] In a second aspect, the present invention further provides a method for treating urea in urban water supply and drainage, comprising: feeding sewage into the filter shell through a liquid inlet pipe, and filtering floating impurities through the first filter screen;

[0014] The sewage mixes and reacts with the alkali metal sulfur compound in the filter shell, and precipitation occurs;

[0015] The treated sewage is sequentially treated through the aeration component and the electrolysis component and then discharged;

[0016] Starting the sliding of the moving frame drives the gear to rotate under the support of the rack, driving the rotating roller to scrape the sediment at the bottom close to the conveying pipe;

[0017] The negative pressure pump generates negative pressure in the conveying pipe, thereby driving the precipitate to be discharged through multiple feed ports.

[0018] The method and device for treating urea in urban water supply and drainage of the present invention, the support assembly serves as the basic framework of the entire treatment device, and is composed of a solid base and a support frame. The base provides a stable installation platform, and the support frame is installed on the top of the base by a reliable fixed connection method, ensuring the stability and load-bearing capacity of the upper assembly. The filter assembly is responsible for the preliminary removal of suspended matter and some urea precursor substances in the water. This assembly includes a first filter screen, a filter housing, and a liquid inlet pipe. The first filter screen is arranged on the top of the filter housing, serving as the first barrier to intercept impurities; the filter housing is firmly fixed on the support frame to provide a closed space for the filtering process; the liquid inlet pipe is used to place sewage. The cleaning assembly is composed of a mobile frame, a gear, a rotating roller, a rack, a delivery pipe, and a negative pressure pump. The mobile frame is designed to slide inside the filter housing, and a rack is installed on it; the gear is rotatably connected to the mobile frame and controls the moving direction through precise meshing with the rack. During the movement of the mobile frame, the gear can rotate under the support of the rack, and the rotating roller is connected to the gear. As the gear rotates, the rotating roller is driven to work, so that the rotating roller can bring the sediment at the bottom to the position of the conveying pipe. The conveying pipe is provided with multiple feed ports, which can effectively collect the solid waste intercepted by the filter screen. The negative pressure pump is connected to the conveying pipe, and the collected waste is extracted by the negative pressure, so that the bottom of the filter shell can be kept in a clean state. The aeration component is connected to the filter shell, and by injecting air or oxygen into the water, the dissolved oxygen content in the water body is increased, the activity of aerobic microorganisms is promoted, the biodegradation process of organic matter such as urea is accelerated, and the purification efficiency is improved. As a deep treatment stage, the electrolysis component is closely connected to the aeration component. Using the principle of electrolysis, the residual urea and other pollutants that are difficult to biodegrade are further decomposed, the urea content in the water is completely eliminated, and the effluent water quality is ensured to meet high standards. In summary, this urea treatment device in urban water supply and drainage, through fine structural design and efficient treatment process, realizes a full range of treatment strategies from physical filtration, automatic slag removal, biological oxidation to chemical decomposition, making it more convenient to treat sedimentation, thereby saving cleaning time, improving work efficiency, and providing strong technical support for urban water resource recycling and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural diagram of a device for treating urea in urban water supply and drainage according to a first embodiment of the present invention.

[0021] Figure 2It is a right side structural diagram of the device for treating urea in urban water supply and drainage according to the first embodiment of the present invention.

[0022] Figure 3 It is a left side structural diagram of a device for treating urea in urban water supply and drainage according to a first embodiment of the present invention.

[0023] Figure 4 It is a cross-sectional structural diagram of a device for treating urea in urban water supply and drainage according to a first embodiment of the present invention.

[0024] Figure 5 yes Figure 4 A partial enlargement of detail A.

[0025] Figure 6 It is a flow chart of a method for treating urea in urban water supply and drainage according to a second embodiment of the present invention.

[0026] Support assembly 101, filter assembly 102, cleaning assembly 103, aeration assembly 104, electrolysis assembly 105, base 106, support frame 107, first filter screen 108, filter shell 109, liquid inlet pipe 110, movable frame 111, gear 112, rotating roller 113, rack 114, delivery pipe 115, negative pressure pump 116, anti-slip mat 117, sweeper 118, rotating rod 119, second filter screen 120, push block 121, cylinder 122, connecting block 123, first collecting box 124, second collecting box 125, stirring rod 126, stirring motor 127, return spring 128, blast aeration tank 129, window 130, electrolysis cell 131, ultraviolet irradiation lamp 132, baffle 133, connecting rope 134, adjusting wheel 135, adjusting motor 136. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0029] First embodiment

[0030] See also Figure 1 to Figure 5 The present invention provides a device for treating urea in urban water supply and drainage, comprising a support assembly 101, a filter assembly 102, a cleaning assembly 103, an aeration assembly 104 and an electrolysis assembly 105, wherein the support assembly 101 comprises a base 106 and a support frame 107, wherein the support frame 107 is fixedly connected to the base 106 and is located on the top of the base 106, wherein the filter assembly 102 comprises a first filter screen 108, a filter shell 109 and a liquid inlet pipe 110, wherein the filter shell 109 is fixed on the support frame 107, wherein the first filter screen 108 is arranged on the top of the filter shell 109, wherein the liquid inlet pipe 110 is arranged on one side of the filter screen, wherein the cleaning assembly 103 comprises a moving frame 111, a gear 112, a rotating roller 113, a rack 114, a delivery pipe 115 and a negative pressure pump 116, the mobile frame 111 is slidably arranged in the filter shell 109, the rack 114 is arranged on one side of the mobile frame 111, the gear 112 is rotatably connected to the mobile frame 111 and meshes with the rack 114, the rotating roller 113 is connected to the gear 112, the delivery pipe 115 has a plurality of feed ports, the delivery pipe 115 is fixed on the mobile frame 111 and is located at the bottom of the rotating roller 113, the negative pressure pump 116 is connected to the delivery pipe 115, the aeration component 104 is connected to the filter shell 109, and the electrolysis component 105 is connected to the aeration component 104.

[0031] In this embodiment, the support assembly 101 serves as the basic framework of the entire treatment device and is composed of a solid base 106 and a support frame 107. The base 106 provides a stable installation platform, and the support frame 107 is installed on the top of the base 106 by a reliable fixed connection method, ensuring the stability and load-bearing capacity of the upper assembly. The filter assembly 102 is responsible for the preliminary removal of suspended matter and some urea precursor substances in the water. This assembly includes a first filter screen 108, a filter shell 109 body, and a liquid inlet pipe 110. The first filter screen 108 is arranged on the top of the filter shell 109, serving as the first barrier to intercept impurities; the filter shell 109 body is firmly fixed on the support frame 107 to provide a closed space for the filtering process; the liquid inlet pipe 110 is used to put sewage. The cleaning assembly 103 is composed of a mobile frame 111, a gear 112, a rotating roller 113, a rack 114, a delivery pipe 115, and a negative pressure pump 116. The movable frame 111 is designed to slide inside the filter housing 109, and a rack 114 is mounted thereon; the gear 112 is connected to the movable frame 111 in rotation and controls the moving direction by precise meshing with the rack 114. During the movement of the movable frame 111, the gear 112 can rotate under the support of the rack 114, and the rotating roller 113 is connected to the gear 112. As the gear 112 rotates, the rotating roller 113 is driven to work, so that the rotating roller 113 can bring the sediment at the bottom to the position of the conveying pipe 115. The conveying pipe 115 is provided with multiple feed ports, which can effectively collect the solid waste intercepted by the filter screen. The negative pressure pump 116 is connected to the conveying pipe 115, and the collected waste is extracted by the negative pressure, so that the bottom of the filter housing 109 can be kept in a clean state. The aeration component 104 is connected to the filter housing 109, and by injecting air or oxygen into the water, the dissolved oxygen content in the water body is increased, the activity of aerobic microorganisms is promoted, the biodegradation process of organic matter such as urea is accelerated, and the purification efficiency is improved. As a deep treatment stage, the electrolysis component 105 is closely connected to the aeration component 104. The electrolysis principle is used to further decompose the residual urea and other pollutants that are difficult to biodegrade, completely eliminate the urea content in the water, and ensure that the effluent water quality meets high standards. In summary, this urea treatment device in urban water supply and drainage, through fine structural design and efficient treatment process, realizes a full range of treatment strategies from physical filtration, automatic slag removal, biological oxidation to chemical decomposition, making it more convenient to treat the sediment, thereby saving cleaning time and improving work efficiency, providing strong technical support for urban water resource recycling and environmental protection.

[0032] The support assembly 101 further includes an anti-skid pad 117 , which is fixedly connected to the base 106 and located at the bottom of the base 106 .

[0033] The anti-skid pad 117 is firmly fixed to the bottom of the base 106, effectively preventing the equipment from being displaced unnecessarily due to external forces during operation, thereby ensuring the stability of the overall structure.

[0034] The filter assembly 102 further includes a cleaner 118 , which is slidably disposed on one side of the first filter screen 108 .

[0035] The cleaner 118 is slidably disposed on one side of the first filter screen 108, thereby achieving efficient removal of impurities accumulated on the filter screen.

[0036] The cleaner 118 includes a rotating rod 119, a second filter screen 120, a push block 121, a cylinder 122, a connecting block 123, a first collecting box 124 and a second collecting box 125. The rotating rod 119 is rotatably connected to the filter shell 109 and is located on one side of the first filter screen 108. The second filter screen 120 is fixed on the rotating rod 119. The push block 121 is slidably set on the rotating rod 119. The cylinder 122 is rotatably set on the support frame 107. The output end of the cylinder 122 is connected to the push block 121. The first collecting box 124 and the second collecting box 125 are set on both sides of the filter shell 109.

[0037] The rotating rod 119 is flexibly connected to the filter housing 109 and is located next to the first filter screen 108, while the second filter screen 120 is fixed on the rotating rod 119, which enhances the filtering effect. The push block 121 slides along the rotating rod 119, and cooperates with the rotation setting of the cylinder 122 (the cylinder 122 is installed on the support frame 107, and its output end is connected to the push block 121), so that the starting cylinder 122 can drive the connecting block 123 to move, thereby driving the rotating rod 119 to rotate, and the rotating rod 119 can push the push block 121 to clean the impurities on the first filter screen 108, and continue to filter the incoming sewage through the second filter screen 120. The first collection box 124 and the second collection box 125 are respectively arranged on both sides of the filter housing 109, for collecting the separated impurities.

[0038] The filter assembly 102 further includes a stirring rod 126 and a stirring motor 127 . The stirring rod 126 is rotatably connected to the filter housing 109 and is located inside the filter housing 109 . The output end of the stirring motor 127 is connected to the stirring rod 126 .

[0039] The stirring rod 126 is rotatably connected to the filter shell 109 and placed in the shell, and the output end of the stirring motor 127 is directly connected to the stirring rod 126. Driven by the motor, the stirring rod 126 stirs in the filter shell 109, which helps to accelerate the contact reaction between pollutants in the water and the filter medium and improve the treatment efficiency.

[0040] The cleaner 118 further includes a return spring 128 , and the return spring 128 is disposed between the cylinder 122 and the connection block 123 .

[0041] In addition, the cleaner 118 is also equipped with a return spring 128, which is placed between the cylinder 122 and the connecting block 123 to ensure that the push block 121 can quickly return to its original position after completing a pushing action to prepare for the next round of cleaning.

[0042] The aeration assembly 104 includes an aeration tank 129 and a window 130 . The window 130 is disposed on one side of the aeration tank 129 .

[0043] The design of the aeration assembly 104 is also sophisticated. It not only includes a traditional aeration tank 129 to increase the oxygen content of the water, but also has a window 130 specially arranged on one side of the aeration tank 129 to facilitate observation of the aeration process and maintenance management.

[0044] The electrolytic assembly 105 includes an electrolytic cell 131 and an ultraviolet irradiation lamp 132 , and the ultraviolet irradiation lamp 132 is disposed on the top of the electrolytic cell 131 .

[0045] The electrolytic component 105 is equipped with an ultraviolet irradiation lamp 132 installed on the top of the electrolytic cell 131. The ultraviolet rays can be used to sterilize the electrolytically treated water for a second time, ensuring that the water quality for final discharge or reuse is safe and harmless.

[0046] The cleaning assembly 103 also includes two baffles 133, a connecting rope 134, an adjusting wheel 135 and an adjusting motor 136. The two baffles 133 are rotatably connected to the conveying pipe 115 and are located on both sides of the conveying pipe 115. The adjusting wheel 135 is rotatably connected to the moving frame 111. The output end of the adjusting motor 136 is fixedly connected to the adjusting wheel 135 and is located on one side of the adjusting wheel 135. The connecting rope 134 passes through the adjusting wheel 135, and its two ends are respectively connected to the two baffles 133.

[0047] The baffle 133 can be used to temporarily support the impurities collected during the movement so that they can be better delivered through the negative pressure pump 116. The specific method is to start the adjusting motor 136 to drive the adjusting wheel 135 to rotate, thereby driving the connecting rope 134 to move to drive the baffle 133 on one side to be lifted, while the baffle 133 on the other side can be lowered, so that the impurities can be temporarily blocked when the conveying pipe 115 moves back and forth, so that the cleaning effect is better.

[0048] Second embodiment

[0049] See also Figure 6The present invention also provides a method for treating urea in urban water supply and drainage, comprising:

[0050] S201 sends sewage into the filter housing 109 through the liquid inlet pipe 110, and filters floating impurities through the first filter screen 108;

[0051] First, the sewage to be treated is introduced into the carefully designed filter housing 109 through the liquid inlet pipe 110. At this stage, the sewage will first pass through the first filter screen 108 arranged on the top of the filter housing 109. The filter screen can effectively intercept and remove larger floating impurities in the water, such as suspended matter, debris, etc., laying the foundation for subsequent deep treatment.

[0052] The S202 wastewater reacts with the alkali metal sulfur compound in the filter shell 109 and produces precipitation;

[0053] The initially filtered sewage continues to react with the pre-added alkali metal sulfur compound in the filter shell 109. This chemical process is designed to treat organic pollutants such as urea in a targeted manner, and convert them into easily separable precipitation substances through chemical reactions. As the reaction proceeds, visible precipitation gradually forms in the water body, which is a direct reflection of the effective conversion and aggregation of pollutants.

[0054] S203 The treated sewage is sequentially processed through the aeration component 104 and the electrolysis component 105 and then discharged;

[0055] The treated sewage is then directed to the aeration assembly 104 and the electrolysis assembly 105. During the aeration stage, the dissolved oxygen concentration in the water is increased by air blowing or pure oxygen aeration, which promotes the activity of aerobic microorganisms and accelerates the biodegradation of organic matter. The subsequent electrolysis treatment uses the principle of electrolysis to further decompose the residual organic matter and inorganic pollutants, such as urea. At the same time, the use of ultraviolet irradiation lamps 132 enhances the disinfection effect and ensures that the effluent quality reaches high standards.

[0056] S204: Start the moving frame 111 to slide and drive the gear 112 to rotate under the support of the rack 114, and drive the rotating roller 113 to scrape the sediment at the bottom to move closer to the conveying pipe 115;

[0057] In order to solve the sedimentation problem, the system is designed with an automatic cleaning mechanism. When the sedimentation accumulates to a certain amount, the moving frame 111 is started to slide along the pre-set track. This action drives the rotating roller 113 to roll slowly along the bottom of the filter shell 109 through the precise cooperation of the gear 112 and the rack 114, gradually pushing the deposited impurities to the vicinity of the conveying pipe 115, preparing for the next step of removal.

[0058] S205 The negative pressure pump 116 generates negative pressure in the delivery pipe 115, thereby driving the precipitate to be discharged through multiple feed ports.

[0059] Finally, the negative pressure pump 116 located inside the delivery pipe 115 is started to generate a negative pressure environment through the pipeline system. This pressure difference is sufficient to effectively suck the sediment at the bottom of the delivery pipe 115 and around its multiple feed ports and transport it to the collection or treatment facilities, achieving continuous and efficient removal of the sediment, ensuring the continuous and efficient operation of the treatment device, and avoiding the risk of blockage and secondary pollution.

[0060] In summary, this comprehensive treatment method not only effectively removes urea from urban water supply and drainage through precisely controlled physical, chemical and biological treatment methods, but also significantly improves the automation level and treatment efficiency of the entire treatment system, providing a scientific and effective solution for the protection of urban water environment and the sustainable use of resources.

[0061] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A device for treating urea in urban water supply and drainage, characterized in that: It includes a supporting component, a filtering component, a cleaning component, an aeration component and an electrolysis component, wherein the supporting component includes a base and a supporting frame, the supporting frame is fixedly connected to the base and is located at the top of the base, the filtering component includes a first filter screen, a filtering shell and a liquid inlet pipe, the filtering shell is fixed on the supporting frame, the first filter screen is arranged on the top of the filtering shell, and the liquid inlet pipe is arranged on one side of the filtering screen, the cleaning component includes a moving frame, a gear, a rotating roller, a rack, a conveying pipe and a negative pressure pump, the moving frame is slidably arranged in the filtering shell, the rack is arranged on one side of the moving frame, the gear is rotatably connected to the moving frame and meshes with the rack, the rotating roller is connected to the gear, the conveying pipe has a plurality of feed ports, the conveying pipe is fixed on the moving frame and is located at the bottom of the rotating roller, the negative pressure pump is communicated with the conveying pipe, the aeration component is communicated with the filtering shell, and the electrolysis component is communicated with the aeration component.

2. The device for treating urea in urban water supply and drainage according to claim 1, characterized in that: The support assembly also includes an anti-skid pad, which is fixedly connected to the base and located at the bottom of the base.

3. The device for treating urea in urban water supply and drainage according to claim 2, characterized in that: The filter assembly further includes a cleaner, which is slidably disposed on one side of the first filter screen.

4. The device for treating urea in urban water supply and drainage according to claim 3, characterized in that: The cleaner includes a rotating rod, a second filter, a push block, a cylinder, a connecting block, a first collecting box and a second collecting box. The rotating rod is rotatably connected to the filter shell and is located on one side of the first filter. The second filter is fixed on the rotating rod. The push block is slidably arranged on the rotating rod. The cylinder is rotatably arranged on the supporting frame. The output end of the cylinder is connected to the push block. The first collecting box and the second collecting box are arranged on both sides of the filter shell.

5. The device for treating urea in urban water supply and drainage according to claim 4, characterized in that: The filter assembly further comprises a stirring rod and a stirring motor. The stirring rod is rotatably connected to the filter shell and is located inside the filter shell. The output end of the stirring motor is connected to the stirring rod.

6. The device for treating urea in urban water supply and drainage according to claim 5, characterized in that: The cleaner further includes a return spring, and the return spring is arranged between the cylinder and the connection block.

7. The device for treating urea in urban water supply and drainage according to claim 6, characterized in that: The aeration assembly comprises an aeration tank and a window, and the window is arranged on one side of the aeration tank.

8. The device for treating urea in urban water supply and drainage according to claim 7, characterized in that: The electrolysis assembly comprises an electrolysis cell and an ultraviolet irradiation lamp, and the ultraviolet irradiation lamp is arranged on the top of the electrolysis cell.

9. A method for treating urea in urban water supply and drainage, applied to the method according to any one of claims 1 to 8 It is characterized in that The method comprises: sending sewage into the filter shell through a liquid inlet pipe, and filtering floating impurities through the first filter screen; The sewage mixes and reacts with the alkali metal sulfur compound in the filter shell, and precipitation occurs; The treated sewage is sequentially treated through the aeration component and the electrolysis component and then discharged; Starting the sliding of the moving frame drives the gear to rotate under the support of the rack, driving the rotating roller to scrape the sediment at the bottom close to the conveying pipe; The negative pressure pump generates negative pressure in the conveying pipe, thereby driving the precipitate to be discharged through multiple feed ports.

Images