A precise dosing device and system for sewage treatment

Abstract

The present invention discloses a precision dosing device and system for sewage treatment, which relates to the technical field of sewage treatment equipment. The precision dosing device is used in a reactor. The precision dosing device includes a feed pipe and a stirring member. The stirring member includes a stirring body, a first feeding part and a second feeding part. The stirring body is rotatably connected to the feed pipe and is slidably arranged relative to the feed pipe. The first feeding part and the second feeding part are connected to the stirring body and are spaced apart along the central axis of the stirring body. The position between the stirring body and the feed pipe changes, and the connection between the feed pipe and the stirring member also changes, that is, the connection object of the feed pipe is switched from the first feeding part to the second feeding part. Different reaction liquids are transported to the first feeding part or the second feeding part through the feed pipe. Different reaction liquids are respectively injected into the first feeding part and the second feeding part at different depths. It only needs to adapt to the rotation state of different processes, which can automatically switch the injection position of the reaction liquid.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment equipment, and in particular to a precise dosing device and system for sewage treatment. Background Art

[0002] Wastewater treatment is the process of purifying wastewater to ensure it meets the required quality for discharge into a water body or reuse. Existing wastewater treatment equipment often utilizes a single tank approach, which offers advantages such as a small footprint, high flexibility, and ease of management.

[0003] However, existing single-tank treatments require manual adjustment of pipeline positions to ensure that different reaction solutions are injected into different locations in the reactor to meet different process requirements. This manual adjustment is cumbersome, can lead to high errors, and poses operational safety risks. Summary of the Invention

[0004] In view of the shortcomings of the above-mentioned related technologies, the present application provides a precise dosing device and system for sewage treatment to solve the above-mentioned technical problems.

[0005] The present application provides a precision dosing device for sewage treatment, which is used in a reactor. The precision dosing device includes a feed pipe and a stirring member. The stirring member includes a stirring body, a first feeding part, and a second feeding part. The stirring body is rotatably connected to the feed pipe and is slidably arranged along the feed pipe. The first feeding part and the second feeding part are connected to the stirring body and are spaced apart along the central axis of the stirring body.

[0006] Among them, the stirring member has a first rotation state and a second rotation state. When the stirring member is in the first rotation state, the stirring body is in the first position, and the feeding pipe is connected to the first feeding part. When the stirring member is in the second rotation state, the stirring body can be moved to the second position relative to the feeding pipe under the action of sewage, so that the communication object of the feeding pipe is switched from the first feeding part to the second feeding part.

[0007] To achieve the above-mentioned objectives and other related objectives, the present application provides a precision dosing system for sewage treatment, which includes a reactor, a precision dosing device as described above, and a feeding device, wherein a feed pipe is connected to the feeding device, and a stirring element extends into the reactor.

[0008] The technical solution employed in the present invention can achieve the following beneficial effects: The feed pipe can transport a reaction liquid, such as a polyaluminum chloride solution or a polyacrylamide solution. The stirring body is rotatably connected to the feed pipe and is slidably arranged relative to the feed pipe. The rotational state of the stirring element can be switched from a first rotational state to a second rotational state. In the stirring element, the change between the two rotational states includes, but is not limited to, the rotational direction and rotational speed. Simultaneously, as the rotational state of the stirring element changes, the force exerted by the stirring element on the wastewater in the reactor also changes. The reaction force of the wastewater on the stirring element can cause the stirring body to switch from a first position to a second position. When the stirring body is in the first position, the feed pipe communicates with the first feed section. When the stirring body is in the second position, the feed pipe communicates with the second feed section. Therefore, the positional change between the stirring body and the feed pipe also changes the communication between the feed pipe and the stirring element, i.e., the connection between the feed pipe and the stirring element switches from the first feed section to the second feed section. In this application, by changing the rotational state of the stirring body, the connection between the feed pipe and the second feed section switches. Different reaction liquids are transported to the first feeding part or the second feeding part through the feeding pipe. Different reaction liquids are respectively injected into the first feeding part and the second feeding part located at different depths. It is only necessary to adapt the rotation state of the stirring piece during different processes. This can automatically switch the injection position of the reaction liquid, which can avoid manual adjustment of the pipeline position and does not require additional switching equipment or power equipment, thereby helping to reduce labor costs and equipment costs and improve sewage treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0010] Figure 1 1 is a schematic structural diagram of a precise dosing system according to an exemplary embodiment of the present application;

[0011] Figure 2 1 is a schematic structural diagram of a precise dosing device according to an exemplary embodiment of the present application;

[0012] Figure 3 is a cross-sectional view of a precision dosing device and a reactor shown in an exemplary embodiment of the present application;

[0013] Figure 4 yes Figure 3 A magnified view of point a;

[0014] Figure 5is a structural schematic diagram of another precise dosing device shown in an exemplary embodiment of the present application;

[0015] Figure 6 yes Figure 5 The enlarged view of point b;

[0016] Figure 7 It is a structural diagram of another precise dosing system shown in an exemplary embodiment of the present application.

[0017] In the figure: 1. Precision dosing system; 100. Precision dosing device; 110. Feed pipe; 111. Feed channel; 112. First tube body; 1121. First channel; 113. Second tube body; 1131. Second channel; 120. Stirring member; 121. Stirring body; 122. First feeding part; 123. Second feeding part; 124. Stirring blade; 125. Elastic member; 126. Active member; 1261. Active wheel; 127. Driven member; 1271. Driven wheel; 1272. Sliding chamber; 1273. First gear; 1274. Second gear; 130. Valve body; 140. Control member; 150. Sensor; 200. Reactor; 300. Feeding device; 310. First feeding member; 320. Second feeding member. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0019] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0020] This application provides a precise dosing device 100 for sewage treatment. Figure 1The precise dosing device 100 is used for the reactor 200 . The precise dosing device 100 may include a feed pipe 110 and a stirring member 120 . The feed pipe 110 and the stirring member 120 are connected. The feed pipe 110 and the stirring member 120 are arranged in the reactor 200 .

[0021] The feed pipe 110 can be a hollow tubular structure capable of transporting the reaction liquid required for wastewater treatment, such as polyaluminum chloride (PAC) and polyacrylamide (PAM), without limitation. The feed pipe 110 can be made of metal materials such as stainless steel. Of course, in other cases, the feed pipe 110 can also be made of polymer materials such as polytetrafluoroethylene (PTFE) and polypropylene (PP). The end of the feed pipe can extend into the wastewater in the reactor 200. This prevents splashing of the reaction liquid, which could affect precipitation, and improves wastewater treatment efficiency. The wastewater can include wastewater from printing and dyeing plants, petrochemical wastewater, pharmaceutical wastewater, and the like.

[0022] See also Figure 2 as well as Figure 3 The stirring member 120 may include a stirring body 121, a first feeding portion 122, and a second feeding portion 123. The stirring body 121 is rotatably connected to the feed pipe 110 and is slidably disposed relative to the feed pipe 110. The stirring body 121 is rotatable relative to the feed pipe 110 and can stir the sewage in the reactor 200 to promote uniform mixing of the reaction solution and the sewage, thereby increasing the reaction speed of the sewage treatment.

[0023] The first feeding portion 122 and the second feeding portion 123 can be connected to the stirring body 121 and spaced apart along the central axis of the stirring body 121. When the stirring body 121 extends into the reactor 200, the spaced-apart first feeding portion 122 and the second feeding portion 123 can be located at different positions in the reactor 200. For example, the first feeding portion 122 can be located at the bottom of the reactor 200, and the second feeding portion 123 can be located in the middle of the reactor 200. This arrangement enables the reaction solution to be injected into different positions in the reactor 200.

[0024] For further information, see Figure 3The first feeding part 122 and the second feeding part 123 can be a hollow tubular structure, and the tube wall of the first feeding part 122 and the second feeding part 123 is provided with a plurality of feeding holes, which is conducive to uniformly injecting the reaction liquid into all parts of the reactor 200. The extension direction of the first feeding part 122 and the second feeding part 123 intersects or is perpendicular to the central axis of the stirring body 121. When the stirring body 121 is rotated, the first feeding part 122 and the second feeding part 123 can also be rotated, which can facilitate uniform spreading of the reaction liquid. At the same time, the first feeding part 122 and the second feeding part 123 can also stir the sewage and the reaction liquid to promote the reaction, and the centrifugal force generated by the rotation also promotes the discharge of the reaction liquid.

[0025] The agitator 120 has a first rotational state and a second rotational state. When the agitator 120 is in the first rotational state, the agitator body 121 is in the first position, and the feed pipe 110 is connected to the first feeding portion 122. When the agitator 120 is in the second rotational state, the agitator body 121 can move to the second position relative to the feed pipe 110 under the action of the sewage, so that the feed pipe 110 is connected to the second feeding portion 123 instead of the first feeding portion 122. As the rotational state of the agitator 120 changes, the force exerted by the agitator 120 on the sewage in the reactor 200 also changes. The reaction force of the sewage on the agitator 120 can cause the agitator body 121 to switch from the first position to the second position. The first position and the second position refer to two different positions on the sliding path of the agitator body 121.

[0026] At the same time, because the position between the stirring body 121 and the feed pipe 110 changes, the communication object of the feed pipe 110 is changed, that is, when the stirring body 121 is in the first position, the feed pipe 110 is connected to the first feeding part 122. When the stirring body 121 is in the second position, the feed pipe 110 is connected to the second feeding part 123. Furthermore, under the action of sewage, the stirring body 121 moves from the first position to the second position relative to the feed pipe 110. Then, the communication object of the feed pipe 110 is switched from the first feeding part 122 to the second feeding part 123. Different reaction liquids are transported to the stirring member 120 through the feed pipe 110, so that the first feeding part 122 or the second feeding part 123 at different depths are injected with the corresponding reaction liquid at the specified time. It is only necessary to adapt to the rotation state of the stirring member 120 during different processes. This can automatically switch the injection position of the reaction liquid and improve the sewage treatment efficiency.

[0027] In the stirring member 120 , the amount of change between the first rotation state and the second rotation state includes but is not limited to the rotation direction and rotation speed of the stirring member 120 .

[0028] In this embodiment, the connection between the delivery pipe 110 and the first feeding section 122 is switched to the second feeding section 123 by changing the rotational state of the stirring body 121. Different liquid chemicals are delivered to the stirring element 120 through the delivery pipe 110, so that the first feeding section 122 or the second feeding section 123 at different depths can inject the corresponding liquid chemical at a specified time. This can automatically switch the injection position of the liquid chemical by simply adapting the rotational state of the stirring element 120 to the different processes, thereby improving sewage treatment efficiency.

[0029] Specifically, the precision dosing device 100 provided herein can be used in a single-tank wastewater treatment process. For example, during the initial reaction phase, when adding polyaluminum chloride, the agitator 120 is controlled to switch its rotational state to the first rotational state, so that the polyaluminum chloride enters from the bottom of the reactor 200. Rapid agitation by the agitator 120 promotes rapid coagulation of the polyaluminum chloride and the formation of microflocculations. Later in the reaction phase, when adding polyacrylamide, the agitator 120 is controlled to switch its rotational state to the second rotational state, so that the polyacrylamide is injected from the middle of the reactor 200. This allows the polyacrylamide to act in areas with higher microflocculation concentrations. The low-intensity agitation by the agitator 120 promotes adsorption and bridging of the polyacrylamide, forming larger flocs for sedimentation and separation. For example, in some preferred embodiments, when the agitator 120 is switched to the first rotational state, the agitator 120 rotates at a first speed. When the agitator 120 is switched to the second rotational state, the agitator 120 rotates at a second speed. The first speed can be greater than the second speed. In this way, the dosing position can be adjusted by controlling the rotation speed, and the stirring element 120 can be prevented from breaking up the flocs when adding polyacrylamide.

[0030] The precise dosing device 100 provided in the present application adjusts the dosing position by switching the rotation state of the stirring element 120, which can avoid manual adjustment of the pipeline position and does not require additional switching equipment or power equipment, thereby helping to reduce labor costs and equipment costs.

[0031] In the examples of this application, please refer to Figure 3The stirring member 120 may further include a stirring blade 124, the structure of which includes but is not limited to a propeller shape, a spiral shape, etc., and is not limited thereto. The stirring blade 124 is connected to the stirring body 121. Furthermore, the number of the stirring blades 124 may be multiple, such as 2, 3, etc., and is not limited thereto. Along the direction of rotation of the stirring blade 124, the stirring blade 124 is at least partially tilted toward the axial direction of the stirring body 121, which enables the stirring blade 124 to generate a component force distributed along the axis of rotation during rotation. The component force acts on the sewage, and the stirring blade 124 is simultaneously subjected to a reaction force. When the stirring member 120 switches from the first rotation state to the second rotation state, the stirring member 120 can provide a driving force for relative sliding of the stirring body 121. In other words, the rotating turntable of the stirring member 120 changes, and the force between the stirring blade 124 and the sewage can change, such as the stirring blade 124 can be subjected to a force in the opposite direction to drive the stirring blade 124 to slide.

[0032] In one embodiment, the rotation direction of the stirring member 120 in the first rotation state and the second rotation state is reversed, and the stirring member 120 switches from the first rotation state to the second rotation state to change the driving force direction of the stirring blade 124. Exemplarily, the rotation direction of the stirring member 120 in the first rotation state is clockwise, and the stirring blade 124 stirs the sewage, and the sewage can generate a reaction force on the stirring blade 124. The component direction of the reaction force on the rotation axis is upward to drive the stirring body 121 to slide upward, and at this time the first feeding part 122 and the delivery pipe 110 are connected. The rotation direction of the stirring member 120 in the second rotation state is counterclockwise, and the sewage can generate a reaction force on the stirring blade 124. The component direction of the reaction force on the rotation axis is downward to drive the stirring body 121 to slide downward, and at this time the second feeding part 123 and the delivery pipe 110 are connected. This can drive the stirring body 121 to slide relative to each other by rotating the direction. In addition, the relative position between the stirring body 121 and the feed pipe 110 can change the communication object of the feed pipe 110, which can automatically switch the different positions for injecting the reaction liquid and improve the sewage treatment efficiency.

[0033] In another embodiment, please refer to Figure 3The rotation speed of the stirring member 120 in the first rotation state is greater than the rotation speed of the stirring member 120 in the second rotation state. The stirring member 120 switches from the first rotation state to the second rotation state to change the driving force of the stirring blade 124. The rotation speed of the stirring member 120 is proportional to the driving force of the stirring blade 124. That is, the rotation speed of the stirring member 120 in the first rotation state is greater, the force exerted by the sewage on the stirring blade 124 is greater, and the driving force of the stirring blade 124 is also greater. At this time, the stirring blade 124 is connected to the first feeding portion 122. The rotation speed of the stirring member 120 in the second rotation state is lower, the force exerted by the sewage on the stirring blade 124 is lower, and the driving force of the stirring blade 124 is also lower. At this time, the gravity of the stirring member 120 is greater than the driving force, and gravity drives the stirring member 120 to move downward, so that the stirring blade 124 is connected to the second feeding portion 123. This can be adapted to existing process requirements. Specifically, when polyaluminum chloride is added at the beginning of the reaction stage, the stirring element 120 stirs rapidly, and the polyaluminum chloride is injected from the bottom of the reactor 200 through the first feeding portion 122. In the middle and late stages of the reaction stage, the stirring element 120 stirs at a low speed, and polyacrylamide is injected from the middle portion of the reactor 200 through the second feeding portion 123. By adapting the rotation state of the stirring element 120 to different processes, it is possible to automatically switch between different injection positions of the reaction solution, thereby improving wastewater treatment efficiency.

[0034] For further information, see Figure 4 , the stirring member 120 is provided with an elastic member 125, and the elastic member 125 includes but is not limited to a spring or a shrapnel, etc., and is not limited. The elastic member 125 elastically abuts the stirring body 121, and drives the stirring body 121 to slide to the first position. When the stirring member 120 is in the second rotation state, the stirring blade 124 can drive the stirring body 121 to slide relatively, and squeeze the elastic member 125 to deform, so that the stirring body 121 can move to the second position relative to the feed pipe 110 under the action of sewage. Compared with gravity, the elastic force direction of the elastic member 125 is clearer, and it can stably drive the stirring body 121 to reset. This also eliminates the need to consider the direction of gravity, and when installing the precision dosing device 100, there is no need to accurately and horizontally configure the stirring member 120 alone, thereby simplifying the installation steps.

[0035] Of course, the elastic force of the elastic member 125 may be in the same direction as the gravity of the stirring member 120. When the stirring member 120 is in the second rotation state, the stirring blade 124 can simultaneously resist the elastic force of the elastic member 125 and the gravity of the stirring member 120. Alternatively, in some cases, the elastic force of the elastic member 125 may intersect with or be opposite to the gravity of the stirring member 120, which will not be described in detail here.

[0036] In another embodiment, the stirring member 120 rotates in opposite directions and at different speeds in the first and second rotational states. This allows the driving force of the stirring blade 124 to change in both direction and magnitude, which helps increase the variation in the driving force of the stirring blade 124 in the two states and improve the driving effect.

[0037] In the examples of this application, please refer to Figure 4 The stirring member 120 may further include a driving member 126 and a driven member 127. The driving member 126 may be a driving motor, etc., and the driven member 127 may be a hollow structure so that the feeding pipe 110 can be passed through. The driving member 126 is transmission-connected to the driven member 127, and the transmission connection method includes but is not limited to gear transmission or belt transmission. The stirring body 121 is transmission-connected to the driven member 127, and the stirring body 121 is slidingly arranged relative to the driven member 127. The driving member 126 can drive the driven member 127 to rotate, and at the same time, the driven member 127 drives the stirring body 121 to rotate. The driving member 126 can drive the driven member 127 to drive the stirring body 121 to rotate. Furthermore, the driving member 126 is provided with a driving wheel 1261, and a driven wheel 1271 is provided outside the driven member 127, and the driving wheel 1261 and the driven wheel 1271 are transmission-connected. The connection method between the driving wheel 1261 and the driven wheel 1271 can be belt transmission or gear transmission, etc., and is not limited.

[0038] The follower 127 has a sliding cavity 1272, and the cavity wall forming the sliding cavity 1272 is provided with a first gear 1273, and the stirring body 121 is provided with a second gear 1274. The second gear 1274 is located in the sliding cavity 1272 and is engaged with the first gear 1273. The sliding cavity 1272 can limit the range of motion of the second gear 1274 to prevent the stirring body 121 from sliding excessively. When the follower 127 rotates, the first gear 1273 can drive the second gear 1274. While the stirring body 121 can slide from the first position to the second position, the second gear 1274 can slide relative to the first gear 1273. The first gear 1273 has both a transmission function so that the first gear 1273 can stably drive the second gear 1274, and a guiding function to prevent the second gear 1274 from sliding along the preset direction, thereby improving reliability in use.

[0039] In a more specific embodiment, the sliding cavity 1272 can restrict the stirring body 121 from switching between the first and second positions, preventing excessive movement. When the stirring body 121 is in the first position, the elastic member 125 can act on the second gear 1274, ensuring that the second gear 1274 is at the top of the sliding cavity 1272. At this time, the reaction force of the sewage is less than the elastic force of the elastic member 125. The combined force of the walls of the sliding cavity 1272 and the elastic member 125 ensures that the stirring body 121 remains in the first position. When the stirring member 120 is in the second rotational state, the stirring blade 124 can drive the stirring body 121 to slide relative to it, squeezing the elastic member 125 to deform. The reaction force drives the second gear 1274 to move, ensuring that the second gear 1274 is at the bottom of the sliding cavity 1272. At this time, the reaction force of the walls of the sliding cavity 1272 and the sewage ensures that the stirring body 121 remains in the second position. This can ensure that the stirring body 121 does not move excessively and can also ensure that the stirring body 121 is at a specified position, thereby ensuring that the stirring body 121 is continuously at the first position or the second position.

[0040] In the examples of this application, please refer to Figure 3 The feed pipe 110 includes a feed channel 111. The wall of the feed pipe 110 is provided with a first through hole and a second through hole. The feed channel 111 connects the first through hole and the second through hole. The first through hole and the second through hole are spaced apart along the axial direction of the feed pipe 110. The first through hole can be arranged corresponding to the first feeding part 122, and the second through hole can be arranged corresponding to the second feeding part 123. Furthermore, the spacing between the first through hole and the second through hole is not equal to the spacing between the first feeding part 122 and the second feeding part 123. At the same time, the first through hole and the first feeding part 122 or the second through hole and the second feeding part 123 are connected to each other. When the stirring body 121 is in the first position, the first through hole is connected to the first feeding part 122, and the second through hole is separated from the second feeding part 123. The reaction liquid in the feed pipe 110 can be transported to the first feeding part 122. When the stirring body 121 is in the second position, the second through hole is connected to the second feeding part 123, the first through hole is separated from the first feeding part 122, and the reaction liquid in the feeding pipe 110 can be transported to the second feeding part 123. The sliding displacement of the stirring body 121 can accurately control the connection object of the first through hole and the second through hole, thereby realizing the orderly discharge of different reaction liquids. When the reaction liquid needs to be replaced, it is only necessary to change the position of the stirring body 121 to switch the connection object and realize the discharge of another reaction liquid. In addition, by adjusting the rotation state of the stirring member 120, the position of the stirring body 121 can be changed, which can significantly improve the sewage treatment efficiency and reduce the manual operation steps.

[0041] It is understood that the reaction force of the sewage or the elastic force of the elastic member 125 can ensure that the stirring body 121 remains stable in the first or second position, or that the stirring body 121 experiences only slight position fluctuations, which facilitates continuous communication between the first feeding portion 122 and the second feeding portion 123. Of course, in some cases, the first and second through-holes can be elliptical or bar-shaped, with the lengths of the first and second through-holes roughly aligning with the direction of extension of the feed pipe 110. Due to the shape and structure of the first and second through-holes, the communication ranges of the first and second through-holes are distributed along the direction of movement of the stirring body 121. This ensures that the stirring body 121 can maintain communication with the first or second through-hole even when experiencing dynamic position fluctuations. Taking the first through-hole as an example, when the stirring body 121 is in the first position, the position of the stirring body 121 and its first feeding portion 122 may slightly change vertically due to the reaction force of the water flow. However, due to the shape and size of the first through-hole, the first feeding portion 122 can still maintain communication with the first through-hole. This can improve the fault tolerance rate and ensure that the feeding part and the conveying pipe are accurately connected. In addition, the shape and size of the first through hole and the second through hole can be determined and designed according to the specific activity path and implementation scenario to adapt to different sewage, etc.

[0042] For further information, see Figure 5 as well as Figure 6 The feed pipe 110 may include a first tube body 112 and a second tube body 113. The first tube body 112 has a first channel 1121. The first channel 1121 can be connected to the first feeding part 122, and the first channel 1121 can transport the reaction liquid to the first feeding part 122. The diameter of the first tube body 112 is smaller than that of the second tube body 113, and the second tube body 113 is sleeved outside the first tube body 112. A second channel 1131 is formed between the first tube body 112 and the second tube body 113. The relatively independent first channel 1121 and second channel 1131 can respectively transport different sewage, which can avoid the mixing of different sewage and the resulting low precision of the treatment process, thereby improving the sewage treatment effect. Of course, with the relative movement between the stirring body 121 and the feed pipe 110, it will also enable the first channel 1121 to be isolated from or connected to the first feeding part 122, and the second channel 1131 to be isolated from or connected to the second feeding part 123.

[0043] In some other cases, a limiting structure can also be provided between the feed pipe 110 and the stirring member 120. The limiting structure can be a protrusion and a groove, a snap-fit ​​structure, etc., and is not limited. Taking the protrusion and the groove as an example for description, the feed pipe 110 is located in the stirring member 120, the outer wall of the feed pipe 110 is provided with a protrusion, and the inner wall of the stirring member 120 is provided with a groove, and the protrusion and the groove cooperate with each other. When the stirring body 121 is in the first position or the second position, the protrusion can be embedded in the groove to provide a limiting effect between the stirring body 121 and the feed pipe 110, so as to ensure that the stirring body 121 is continuously in the first position or the second position. This can prevent the limiting effect of the limiting structure from resisting the flow, fluctuation, etc. of the sewage, thereby preventing it from affecting the stirring member 120 and ensuring stable communication between the feed pipe 110 and the stirring member 120. Of course, in some embodiments, the stirring member 120 can be provided with an elastic member 125. When the rotation speed of the stirring member 120 decreases or reaches 0, the reaction force of the sewage almost disappears, or the reaction force of the sewage is less than the elastic force of the elastic member 125. At this time, the elastic force of the elastic member 125 can overcome the force of the limiting structure and drive the stirring member 120 to the first position. Conversely, when the rotation speed of the stirring member 120 increases or rotates in the opposite direction, the reaction force of the sewage can not only squeeze the elastic member 125, but also overcome the force of the limiting structure and drive the stirring member 120 to the second position. This can ensure that the feed pipe 110 is in the specified position through the limiting structure, thereby improving stability.

[0044] To achieve the above and other related purposes, please refer to Figure 1 The present application provides a precision dosing system 1 for sewage treatment. The precision dosing system 1 may include a reactor 200, a precision dosing device 100 as described above, and a feeding device 300. In this way, the precision dosing system 1 has the beneficial effects of any of the above-mentioned solutions, and the feeding device 300 is not described here in detail. The feeding pipe 110 is connected to the feeding device 300 to transport the reaction liquid into the feeding pipe 110. The stirring member 120 extends into the reactor 200, and the stirring member 120 can stir the sewage in the reactor 200.

[0045] In the examples of this application, please continue to refer to Figure 1The feeding device 300 may further include a first feeding piece 310 and a second feeding piece 320. The first feeding piece 310 may store and transport the first reaction liquid, which may be polyaluminum chloride, etc. The second feeding piece 320 may store and transport the second reaction liquid, which may be polyacrylamide, etc. The first feeding piece 310 and the second feeding piece 320 in the embodiment of the present application, the precision dosing system 1 may further include a valve body 130 and a control piece 140. The control piece 140 may include but is not limited to a processor, a memory, etc., and is not limited. The processor is capable of receiving and running a control program, which may be pre-stored in a memory or transmitted in real time to an external device, etc. The valve body 130 may be an electric ball valve, an electric stop valve, etc., and is not limited. The valve body 130 is connected to the feed pipe 110, and the valve body 130 is used to selectively connect one of the first feeding piece 310 and the second feeding piece 320. The valve body 130 can be used to automatically connect the corresponding feeding parts so that the corresponding reaction liquid can be transported to the feeding pipe 110, which can avoid mixing of different reaction liquids and improve the safety of sewage treatment.

[0046] See also Figure 1 as well as Figure 7 The stirring member 120 may be provided with a sensor 150, and the sensor 150 may be an infrared distance sensor, a travel switch or a magnetic sensor, etc., and is not limited. The sensor 150 is used to obtain the relative position of the stirring member 120. Taking the infrared distance sensor as an example, the sensor 150 can be set at the top of the reactor 200, and the stirring body 121 can be provided with a protrusion. The sensor 150 can detect the distance between the protrusion and the top of the reactor 200, and the feed pipe 110 is fixed relative to the reactor 200, so as to obtain the position relationship of the stirring member 120 relative to the feed pipe 110.

[0047] The control member 140 is electrically connected to the valve body 130 and the sensor 150. When the stirring member 120 is in the first position, the first through hole communicates with the first feeding portion 122, and the second through hole is isolated from the second feeding portion 123. Simultaneously, the control member 140 controls the valve body 130 to communicate with the first feeding member 310, so that the first feeding member 310 can deliver the corresponding first reaction liquid to the first feeding portion 122. When the stirring member 120 is in the second position, the second through hole communicates with the second feeding portion 123, and the first through hole is isolated from the first feeding portion 122. Simultaneously, the control member 140 controls the valve body 130 to communicate with the second feeding member 320, so that the first feeding member 310 can deliver the corresponding first reaction liquid to the first feeding portion 122. This setting can realize the linkage between the stirring member 120 and the feeding device 300, that is, the position of the stirring member 120 changes, which can switch the conductive object of the feeding pipe 110 while also switching the corresponding feeding member so that the specified reaction liquid can be transported to the feeding pipe 110, simplifying the operation steps, avoiding the mismatch between the reaction liquid and the feeding part, and causing the reaction liquid discharge position to mismatch, thereby significantly improving production efficiency and sewage treatment effect.

[0048] In a more specific embodiment, the first feeding member 310 and the second feeding member 320 are each provided with at least two pump bodies. In other words, the first feeding member 310 has two or more pump bodies, and the second feeding member 320 has two or more pump bodies. At the same time, at least one pump body of the first feeding member 310 or the second feeding member 320 is connected to the feed pipe 110. When the feed pipe 110 is conveying the first reaction liquid, at least one pump body of the first feeding member 310 is ensured to be able to communicate with the feed pipe 110. When the feed pipe 110 is conveying the second reaction liquid, at least one pump body of the second feeding member 320 is ensured to be able to communicate with the feed pipe 110. At least two pump bodies can be set up for redundancy. If one pump body fails, the other pump body can take over or continue to operate, so that the sewage in the reactor 200 can react continuously, avoiding the situation where the reaction is interrupted and the sewage treatment fails.

[0049] Of course, at the same time, at least two pump bodies of the first feeding member 310 or the second feeding member 320 can be connected to the feeding pipe 110 at the same time and start working at the same time. A larger number of pump bodies can increase the discharge speed of the reaction liquid and improve the efficiency of sewage treatment.

[0050] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0051] Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in reverse order depending on the functions involved. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to certain examples may be combined in other examples.

[0052] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A precise dosing device for sewage treatment, used in a reactor, characterized in that: The precise dosing device comprises: A material delivery pipe, wherein the material delivery pipe has a material delivery channel therein, a first through hole and a second through hole are formed on a wall of the material delivery pipe, and the material delivery channel communicates with the first through hole and the second through hole; A stirring member, the stirring member includes a stirring body, a first feeding portion and a second feeding portion, the stirring body is rotatably connected to the feeding pipe and is slidably arranged along the feeding pipe, the first feeding portion and the second feeding portion are connected to the stirring body and are spaced apart along the central axis of the stirring body, the stirring member also includes a stirring blade, the stirring blade is connected to the stirring body, and along the direction of rotation of the stirring blade, the stirring blade is at least partially inclined toward the axial direction of the stirring body, the stirring member is provided with an elastic member, the elastic member elastically abuts against the stirring body, and the elastic member can drive the stirring body to slide to the first position; wherein the stirring member has a first rotation state and a second rotation state; when the stirring member is in the first rotation state, the stirring body is in the first position, the first through hole is connected to the first feeding part, and the second through hole is separated from the second feeding part; when the stirring member is in the second rotation state, the stirring blade can drive the stirring body to slide relatively and squeeze the elastic member to deform; the stirring body can move to the second position relative to the feeding pipe under the action of sewage; when the stirring body is in the second position, the second through hole is connected to the second feeding part, and the first through hole is separated from the first feeding part, so that the communication object of the feeding pipe is switched from the first feeding part to the second feeding part; When the stirring member switches from the first rotation state to the second rotation state, the stirring member can provide a driving force for relative sliding of the stirring body. The rotation directions of the stirring member in the first rotation state and the second rotation state are opposite. The stirring member switches from the first rotation state to the second rotation state to change the driving force direction of the stirring blade.

2. The precise dosing device according to claim 1, characterized in that: The stirring member has a rotation speed greater than that in the second rotation state in the first rotation state. The stirring member switches from the first rotation state to the second rotation state to change the driving force of the stirring blade.

3. The precise dosing device according to claim 1, characterized in that: The stirring member also includes an active member and a driven member. The active member is connected to the driven member through transmission, and the stirring body is connected to the driven member through transmission. The stirring body is slidingly arranged relative to the driven member. The active member can drive the driven member to rotate, and at the same time, the driven member drives the stirring body to rotate.

4. The precise dosing device according to claim 3, characterized in that: The active member is provided with a driving wheel, and a driven wheel is provided outside the driven member. The driving wheel and the driven wheel are connected in transmission. A sliding cavity is provided inside the driven member, and a first gear is provided on the cavity wall forming the sliding cavity. The stirring body is provided with a second gear, and the second gear is located in the sliding cavity and meshes with the first gear. When the stirring body can slide from the first position to the second position, the second gear can slide relative to the first gear.

5. The precise dosing device according to claim 1, characterized in that: The feed pipe includes a first tube body and a second tube body, the first tube body has a first channel, the first channel is connected to the first feeding part, the second tube body is sleeved outside the first tube body, and a second channel is formed between the first tube body and the second tube body, and the second channel is connected to the second feeding part.

6. A precise dosing system for sewage treatment, characterized in that: The precise dosing system includes a reactor, the precise dosing device according to any one of claims 1 to 5, and a feeding device, the feed pipe is connected to the feeding device, and the stirring member extends into the reactor.

7. The precise dosing system according to claim 6, characterized in that: The feeding device further includes a first feeding member and a second feeding member, and the precise dosing system further includes a valve body and a control member, wherein the valve body is connected to the feeding pipe and is used to selectively connect one of the first feeding member and the second feeding member, the stirring member is provided with a sensor, and the sensor is used to obtain the relative position of the stirring member, and the control member is electrically connected to the valve body and the sensor; When the stirring member is in the first position, the control member controls the valve body so that the valve body is connected to the first feeding member. When the stirring member is in the second position, the control member controls the valve body so that the valve body is connected to the second feeding member.

8. The precise dosing system according to claim 7, characterized in that: The first feeding member and the second feeding member are both provided with at least two pump bodies. At the same time, at least one pump body of the first feeding member or the second feeding member is connected to the material delivery pipe.

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