Accurate dosing device and system for sewage treatment

Abstract

The invention discloses a precise dosing device and system for sewage treatment, and relates to the technical field of sewage treatment equipment, the precise dosing device is used for a reactor, the precise dosing device comprises a material conveying pipe and a stirring piece, the stirring piece comprises a stirring main body, a first feeding part and a second feeding part, the stirring main body is rotatably connected to the material conveying pipe, and the stirring main body is rotatably connected to the material conveying pipe; and the first feeding part and the second feeding part are connected with the stirring main body and are arranged at intervals along the central axis of the stirring main body. The position between the stirring main body and the material conveying pipe is changed, and meanwhile, the communication condition between the material conveying pipe and the stirring piece can be changed, that is, the communication object of the material conveying pipe is switched from the first feeding part to the second feeding part. Different reaction liquids are conveyed to the first feeding part or the second feeding part through the conveying pipe, different reaction liquids are injected into the first feeding part and the second feeding part which are located at different depths respectively, and the injection positions of the reaction liquids can be automatically switched only by adapting to rotation states of different processes.

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] Sewage treatment refers to the process of purifying sewage to meet the water quality requirements for discharging into a certain water body or for reuse. Existing sewage treatment equipment often uses a single-pool treatment method, which has the advantages of small floor area, high flexibility, and easy management.

[0003] However, the existing single-pool treatment requires manual adjustment of the pipeline position to inject different reaction liquids into different positions of the reactor to meet the requirements of different processes. Nowadays, manual adjustment has the disadvantages of cumbersome work, high errors, and operational safety risks. Summary of the Invention

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

[0005] The present application provides a precise dosing device for sewage treatment, which is used for a reactor. The precise dosing device includes a feed pipe and a stirring member. The stirring member includes a stirring main body, a first feeding portion, and a second feeding portion. The stirring main body is rotatably connected to the feed pipe and is slidably arranged along the feed pipe. The first feeding portion and the second feeding portion are connected to the stirring main body and are spaced apart along the central axis of the stirring main body. 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 main body is in a first position, and the feed pipe is communicated with the first feeding portion. When the stirring member is in the second rotation state, the stirring main body can move relative to the feed pipe to a second position under the action of sewage, so that the communication object of the feed pipe is switched from the first feeding portion to the second feeding portion.

[0006] To achieve the above object and other related objects, the present application provides a precise dosing system for sewage treatment. The precise dosing system includes a reactor, the precise dosing device as described above, and a feeding device. The feed pipe is communicated with the feeding device, and the stirring member extends into the reactor.

[0007] The technical solution adopted by the present invention can achieve the following beneficial effects: The feeding pipe can transport reaction liquids, such as polyaluminum chloride solution, polyacrylamide solution, etc. The stirring main body is rotationally connected to the feeding pipe and is slidably arranged relative to the feeding pipe. The rotational state of the stirring member can be switched from the first rotational state to the second rotational state. Among them, in the stirring member, the change amount between the two rotational states includes but is not limited to the rotational direction, rotational speed, etc. At the same time, when the rotational state of the stirring member changes, the acting force of the stirring member on the sewage in the reactor will also change, and the reaction force of the sewage on the stirring member can cause the stirring main body to switch from the first position to the second position. When the stirring main body is in the first position, the feeding pipe is communicated with the first feeding part, and when the stirring main body is in the second position, the feeding pipe is communicated with the second feeding part. Therefore, when the position between the stirring main body and the feeding pipe changes, the communication situation between the feeding pipe and the stirring member will also change, that is, the communication object of the feeding pipe is switched from the first feeding part to the second feeding part. In this application, by changing the rotational state of the stirring main body, the communication object of the feeding pipe is switched from the first feeding part to the second feeding part. Different reaction liquids are transported through the feeding pipe to the first feeding part or the second feeding part, and the first feeding part and the second feeding part at different depths inject different reaction liquids respectively. Only by adapting to the rotational state of the stirring member in different processes, this can automatically switch the injection position of the reaction liquid, which can not only avoid manually adjusting the pipeline position, but also does not require adding switching equipment or power equipment, thereby being beneficial to reducing labor costs and equipment costs and improving the sewage treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0009] Figure 1 is a schematic structural diagram of a precise dosing system shown in an exemplary embodiment of the present application; Figure 2 is a schematic structural diagram of a precise dosing device shown in an exemplary embodiment of the present application; Figure 3 is a cross-sectional view of a precise dosing device and a reactor shown in an exemplary embodiment of the present application; Figure 4 is Figure 3 the enlarged view of part a of Figure 5 is a schematic structural diagram of another precise dosing device shown in an exemplary embodiment of the present application; Figure 6 is Figure 5Enlarged view at position b; Figure 7 It is a schematic structural diagram of another precise dosing system shown in an exemplary embodiment of the present application.

[0010] In the figure: 1, precise dosing system; 100, precise dosing device; 110, feed pipe; 111, feed channel; 112, first pipe body; 1121, first channel; 113, second pipe body; 1131, second channel; 120, stirring member; 121, stirring main body; 122, first feeding part; 123, second feeding part; 124, stirring blade; 125, elastic member; 126, driving member; 1261, driving wheel; 127, driven member; 1271, driven wheel; 1272, sliding cavity; 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 implementation manners

[0011] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope protected by the present invention.

[0012] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same type, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0013] The present application provides a precise dosing device 100 for sewage treatment. Please refer to Figure 1 , the 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, and the feed pipe 110 and the stirring member 120 are arranged in the reactor 200.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] For further information, see Figure 3 The 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.

[0018] The stirring member 120 has a first rotation state and a second rotation state. When the stirring member 120 is in the first rotation state, the stirring main body 121 is in the first position, and the material conveying pipe 110 is communicated with the first feeding portion 122. When the stirring member 120 is in the second rotation state, the stirring main body 121 can move relative to the material conveying pipe 110 to the second position under the action of the sewage, so that the communication object of the material conveying pipe 110 is switched from the first feeding portion 122 to the second feeding portion 123. When the rotation state of the stirring member 120 changes, the acting force of the stirring member 120 on the sewage in the reactor 200 also changes, and the reaction force of the sewage on the stirring member 120 can make the stirring main body 121 switch from the first position to the second position. Herein, the first position and the second position refer to two different positions on the sliding path of the stirring main body 121.

[0019] Meanwhile, due to the change in the position between the stirring main body 121 and the material conveying pipe 110, the communication object of the material conveying pipe 110 is changed. That is, when the stirring main body 121 is in the first position, the material conveying pipe 110 is communicated with the first feeding portion 122. When the stirring main body 121 is in the second position, the material conveying pipe 110 is communicated with the second feeding portion 123. Further, under the action of the sewage, the stirring main body 121 moves from the first position to the second position relative to the material conveying pipe 110. Furthermore, the communication object of the material conveying pipe 110 is switched from the first feeding portion 122 to the second feeding portion 123. Different reaction liquids are conveyed to the stirring member 120 through the material conveying pipe 110, so that the first feeding portion 122 or the second feeding portion 123 at different depths injects the corresponding reaction liquid at the specified time. Only by adapting to the rotation state of the stirring member 120 in different processes, the injection position of the reaction liquid can be automatically switched, and the sewage treatment efficiency can be improved.

[0020] Herein, in the stirring member 120, the change amount between the first rotation state and the second rotation state includes but is not limited to the rotation direction, rotation speed, etc. of the stirring member 120.

[0021] In this embodiment, by changing the rotation state of the stirring main body 121, the communication object of the material conveying pipe 110 is switched from the first feeding portion 122 to the second feeding portion 123. Different liquid medicines are conveyed to the stirring member 120 through the material conveying pipe 110, so that the first feeding portion 122 or the second feeding portion 123 at different depths injects the corresponding liquid medicine at the specified time. Only by adapting to the rotation state of the stirring member 120 in different processes, the injection position of the liquid medicine can be automatically switched, and the sewage treatment efficiency can be improved.

[0022] Specifically, the precise dosing device 100 provided by the present application can be used in the process of treating sewage in a single tank. Exemplarily, when adding polyaluminum chloride at the initial stage of the reaction phase, by controlling the rotation state of the stirring member 120 to switch to the first rotation state, polyaluminum chloride needs to enter from the bottom of the reactor 200 and be rapidly stirred by the stirring member 120 to promote the rapid coagulation of polyaluminum chloride to form microflocs (flocs). In the middle and late stages of the reaction phase, when adding polyacrylamide, by controlling the rotation state of the stirring member 120 to switch to the second rotation state, polyacrylamide is injected from the middle part of the reactor 200, so that it can play a role in the area with a higher concentration of microflocs, and low-intensity stirring by the stirring member 120 promotes the adsorption bridging of polyacrylamide to form larger flocs for sedimentation and separation. Exemplarily, in some preferred embodiments, when the rotation state of the stirring member 120 switches to the first rotation state, the rotation speed of the stirring member 120 is the first rotation speed. When the rotation state of the stirring member 120 switches to the second rotation state, the rotation speed of the stirring member 120 is the second rotation speed. The first rotation speed can be greater than the second rotation speed. In this way, the adjustment of the dosing position can be achieved by controlling the rotation speed, and the stirring member 120 can be prevented from breaking up the flocs when adding polyacrylamide.

[0023] For the precise dosing device 100 provided by the present application, the adjustment of the dosing position is achieved by switching the rotation state of the stirring member 120, which can not only avoid manually adjusting the pipeline position, but also eliminate the need to add switching equipment or power equipment, thereby helping to reduce labor costs and equipment costs.

[0024] In the embodiments of the present application, please refer to Figure 3 , the stirring member 120 may further include stirring blades 124. The structure of the stirring blades 124 includes but is not limited to propeller shape, spiral shape, etc. The stirring blades 124 are connected to the stirring main body 121. Further, the number of the stirring blades 124 can be multiple, such as 2, 3, etc., without limitation. Along the rotation direction of the stirring blades 124, at least part of the stirring blades 124 are inclined axially toward the stirring main body 121, which can enable the stirring blades 124 to generate a component force distributed along the rotation axis during rotation. The component force acts on the sewage, and the stirring blades 124 will simultaneously receive 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 main body 121. In other words, when the rotation state of the stirring member 120 changes, the acting force between the stirring blades 124 and the sewage can change, such as the stirring blades 124 can receive acting forces in opposite directions to drive the stirring blades 124 to be slidably arranged.

[0025] In one embodiment, the rotation directions of the stirring member 120 in the first rotation state and the second rotation state are opposite. The stirring member 120 is switched 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 rotation, and the stirring blade 124 agitates the sewage, and the sewage can generate a reaction force on the stirring blade 124. The component force direction of this reaction force on the rotation axis is upward to drive the stirring main body 121 to slide upward. At this time, the first feeding part 122 communicates with the feeding pipe 110. The rotation direction of the stirring member 120 in the second rotation state is counterclockwise rotation, and the sewage can generate a reaction force on the stirring blade 124. The component force direction of this reaction force on the rotation axis is downward to drive the stirring main body 121 to slide downward. At this time, the second feeding part 123 communicates with the feeding pipe 110. This can drive the relative sliding of the stirring main body 121 through the rotation direction, and in addition, the relative position between the stirring main body 121 and the feeding pipe 110 can change the communication object of the feeding pipe 110, which can automatically switch the different positions for injecting the reaction liquid and improve the sewage treatment efficiency.

[0026] In another embodiment, please continue to refer to Figure 3 , the 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 is switched from the first rotation state to the second rotation state to change the driving force magnitude of the stirring blade 124. The rotation speed of the stirring member 120 is proportional to the driving force magnitude of the stirring blade 124, that is, the rotation speed of the stirring member 120 in the first rotation state is greater, the acting force of the sewage on the stirring blade 124 is greater, and the driving force of the stirring blade 124 will also be greater. At this time, the stirring blade 124 communicates with the first feeding part 122. The rotation speed of the stirring member 120 in the second rotation state is smaller, the acting force of the sewage on the stirring blade 124 is smaller, and the driving force of the stirring blade 124 will also be smaller. At this time, the gravity of the stirring member 120 is greater than the driving force, and the gravity drives the stirring member 120 to move downward so that the stirring blade 124 communicates with the second feeding part 123. This can be adapted to the existing process requirements, that is, when adding polyaluminum chloride at the initial stage of the reaction stage, the stirring member 120 stirs quickly, and the polyaluminum chloride is injected from the bottom of the reactor 200 through the first feeding part 122. In the middle and later stages of the reaction stage, the stirring member 120 stirs slowly, and polyacrylamide is injected from the middle part of the reactor 200 through the second feeding part 123. By adapting the rotation state of the stirring member 120 for different processes, this can automatically switch the different positions for injecting the reaction liquid and improve the sewage treatment efficiency.

[0027] Furthermore, please refer to 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] The follower 127 has a sliding cavity 1272 therein. A first gear 1273 is provided on the cavity wall forming the sliding cavity 1272, and the stirring main body 121 is provided with a second gear 1274. The second gear 1274 is located within the sliding cavity 1272 and meshes with the first gear 1273. The sliding cavity 1272 can limit the movement range of the second gear 1274 to prevent the stirring main body 121 from sliding excessively. When the follower 127 rotates, the first gear 1273 can drive the second gear 1274. While the stirring main 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 not only has a transmission function to stably drive the second gear 1274, but also has a guiding function to prevent the second gear 1274 from sliding in a preset direction, thereby improving the reliability of use.

[0032] In a more specific embodiment, the sliding cavity 1272 can limit the switching of the stirring main body 121 between the first position and the second position to prevent excessive movement and the like. When the stirring main body 121 is in the first position, the elastic member 125 can act on the second gear 1274 to ensure 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. Under the combined action of the wall of the sliding cavity 1272 and the elastic member 125, it is ensured that the stirring main body 121 remains in the first position continuously. When the stirring member 120 is in the second rotation state, the stirring blade 124 can drive the stirring main body 121 to slide relatively and squeeze the elastic member 125 to deform. The reaction force drives the second gear 1274 to move to ensure that the second gear 1274 is at the bottom of the sliding cavity 1272. At this time, under the action of the cavity wall of the sliding cavity 1272 and the reaction force of the sewage, it is ensured that the stirring main body 121 remains in the second position continuously. This can ensure that the stirring main body 121 does not move excessively and can also ensure that the stirring main body 121 is in the designated position, thereby ensuring that the stirring main body 121 remains in the first position or the second position continuously.

[0033] In the embodiment of the present application, please refer to Figure 3, the material conveying pipe 110 has a material conveying channel 111. The pipe wall of the material conveying pipe 110 is provided with a first through hole and a second through hole, and the material conveying channel 111 communicates with the first through hole and the second through hole. The first through hole and the second through hole are arranged at intervals along the axial direction of the material conveying pipe 110. The first through hole can be correspondingly arranged with the first feeding part 122, and the second through hole can be correspondingly arranged with the second feeding part 123. Further, the distance between the first through hole and the second through hole is not equal to the distance between the first feeding part 122 and the second feeding part 123. At the same moment, the first through hole communicates with the first feeding part 122 or the second through hole communicates with the second feeding part 123. When the stirring main body 121 is in the first position, the first through hole communicates with the first feeding part 122, and the second through hole is blocked from the second feeding part 123, and the reaction liquid in the material conveying pipe 110 can be conveyed to the first feeding part 122. When the stirring main body 121 is in the second position, the second through hole communicates with the second feeding part 123, and the first through hole is blocked from the first feeding part 122, and the reaction liquid in the material conveying pipe 110 can be conveyed to the second feeding part 123. The sliding displacement of the stirring main body 121 can accurately control the communication object of the first through hole and the second through hole, thereby realizing the orderly discharge of different reaction liquids. When it is necessary to replace the reaction liquid, only by changing the position of the stirring main body 121 can the communication object be switched to realize the discharge of another reaction liquid. Moreover, by adjusting the rotation state of the stirring member 120, the position of the stirring main body 121 can be changed, which can significantly improve the sewage treatment efficiency and reduce the manual operation steps.

[0034] It can be understood that under the action of the sewage reaction force or the elastic force of the elastic member 125, this can ensure that the stirring main body 121 is stably in the first position or the second position, or the stirring main body 121 only has slight position fluctuations, which is beneficial to the continuous communication between the first feeding part 122 or the second feeding part 123. Of course, in some cases, the first through hole and the second through hole can be oval holes or strip holes, etc. The length directions of the first through hole and the second through hole are substantially the same as the extending direction of the material conveying pipe 110. Due to the shape and structure of the first through hole and the second through hole, this can ensure that the communication range of the first through hole and the second through hole is distributed along the moving direction of the stirring main body 121, which can ensure that the stirring main body 121 in the state of dynamic position fluctuation can still communicate with the first through hole or the second through hole. Taking the first through hole as an example, when the stirring main body 121 is in the first position, under the influence of the reaction force of the water flow, etc., the positions of the stirring main body 121 and its first feeding part 122 may change slightly in the vertical direction. Due to the shape and size of the first through hole, the first feeding part 122 can still communicate with the first through hole. This can improve the error tolerance rate and ensure the accurate connection between the feeding part and the material conveying pipe. In addition, the shape, size, etc. of the first through hole and the second through hole can be determined and designed according to the specific moving path and implementation scenario to adapt to different sewage, etc.

[0035] Further, please refer to Figure 5 and Figure 6 , the material conveying pipe 110 may include a first pipe body 112 and a second pipe body 113. The first pipe body 112 has a first channel 1121. The first channel 1121 can communicate with 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 pipe body 112 is smaller than that of the second pipe body 113, and the second pipe body 113 is sleeved outside the first pipe body 112. A second channel 1131 is formed between the first pipe body 112 and the second pipe 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 cause situations such as low precision of the treatment process, and improve the sewage treatment effect. Of course, with the relative movement between the stirring main body 121 and the material conveying pipe 110, it can also make the first channel 1121 isolate or communicate with the first feeding part 122, and the second channel 1131 isolate or communicate with the second feeding part 123.

[0036] In some other cases, a limiting structure may be provided between the material conveying pipe 110 and the stirring member 120. The limiting structure can be a convex block and a groove, a buckle structure, etc., without limitation. Taking the convex block and the groove as an example for description, the material conveying pipe 110 is located inside the stirring member 120. The outer wall of the material conveying pipe 110 is provided with a convex block, and the inner wall of the stirring member 120 is provided with a groove, and the convex block and the groove cooperate with each other. When the stirring main body 121 is in the first position or the second position, the convex block can be embedded in the groove to provide a limiting effect between the stirring main body 121 and the material conveying pipe 110, so as to ensure that the stirring main body 121 continuously stays in the first position or the second position. This can resist the limiting effect of the limiting structure during the flow and fluctuation of sewage and avoid its influence on the stirring member 120, ensuring stable communication between the material conveying pipe 110 and the stirring member 120. Of course, in some embodiments, the stirring member 120 may be provided with an elastic member 125. When the rotation speed of the stirring member 120 decreases or is 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 acting force of the limiting structure and drive the stirring member 120 to move to the first position. On the contrary, when the rotation speed of the stirring member 120 increases or rotates in the reverse direction, while the reaction force of the sewage squeezes the elastic member 125, the reaction force can also overcome the acting force of the limiting structure and drive the stirring member 120 to move to the second position. This can ensure that the material conveying pipe 110 is in a specified position through the limiting structure and improve the stability.

[0037] To achieve the above and other related purposes, please refer back to Figure 1, this application provides a precise dosing system 1 for sewage treatment. The precise dosing system 1 may include a reactor 200, the aforementioned precise dosing device 100, and a feeding device 300. In this way, the precise dosing system 1 has the beneficial effects of any of the foregoing solutions, and the connection of the feeding device 300 will not be elaborated here. A feeding pipe 110 is provided to enable the feeding device 300 to transport the reaction liquid into the feeding pipe 110. A stirring member 120 extends into the reactor 200, and the stirring member 120 can stir the sewage in the reactor 200.

[0038] In an embodiment of this application, please continue to refer to Figure 1 , the feeding device 300 may further include a first feeding member 310 and a second feeding member 320. The first feeding member 310 can store and transport a first reaction liquid, and the first reaction liquid can be polyaluminum chloride or the like. The second feeding member 320 can store and transport a second reaction liquid, and the second reaction liquid can be polyacrylamide or the like. In an embodiment of this application, the precise dosing system 1 may further include a valve body 130 and a control member 140. The control member 140 may include, but is not limited to, a processor, a memory, etc. The processor can receive and run a control program, and the control program can be pre-stored in the memory or transmitted in real time by an external device, etc. The valve body 130 can be an electric ball valve, an electric globe valve, etc., without limitation. The valve body 130 is connected to the feeding pipe 110, and the valve body 130 is used to selectively connect one of the first feeding member 310 and the second feeding member 320. Through the valve body 130, automatic connection of the corresponding feeding member can be realized, so that the corresponding reaction liquid is transported into the feeding pipe 110, which can avoid the mixing of different reaction liquids and improve the safety of sewage treatment.

[0039] Please refer to Figure 1 and Figure 7 , the stirring member 120 may be provided with a sensor 150. The sensor 150 can be an infrared distance sensor, a travel switch, a magnetic sensor, etc., without limitation. The sensor 150 is used to obtain the relative position of the stirring member 120. Taking the infrared distance sensor as an example for introduction, the sensor 150 can be arranged at the top of the reactor 200. The stirring main body 121 may be provided with a convex block. The sensor 150 can detect the distance between the convex block and the top of the reactor 200, and the feeding pipe 110 is fixedly arranged relative to the reactor 200, so as to obtain the position relationship of the stirring member 120 relative to the feeding pipe 110.

[0040] 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 blocked from the second feeding portion 123. At the same time, the control member 140 controls the valve body 130 to connect the valve body 130 to the first feeding member 310, so that the first feeding member 310 can send 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 blocked from the first feeding portion 122. At the same time, the control member 140 controls the valve body 130 to connect the valve body 130 to the second feeding member 320, so that the first feeding member 310 can send 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, when the position of the stirring member 120 changes, it can switch the conduction object of the conveying pipe 110 and can also switch the corresponding feeding member, so that the specified reaction liquid can be transported into the conveying pipe 110, simplifying the operation steps, avoiding the situation that the reaction liquid and the feeding portion do not correspond, resulting in the incorrect discharge position of the reaction liquid, and significantly improving the production efficiency and the sewage treatment effect.

[0041] In a more specific embodiment, both the first feeding member 310 and the second feeding member 320 are 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 moment, at least one pump body of the first feeding member 310 or the second feeding member 320 is connected to the conveying pipe 110. When the conveying pipe 110 conveys the first reaction liquid, it is ensured that at least one pump body in the first feeding member 310 can be connected to the conveying pipe 110. When the conveying pipe 110 conveys the second reaction liquid, it is ensured that at least one pump body in the second feeding member 320 can be connected to the conveying pipe 110. At least two pump bodies can achieve redundant setting. When one pump body fails, the other pump body can take over or continue to work, so that the sewage in the reactor 200 can react continuously, avoiding the situation that the reaction is interrupted and the sewage treatment fails.

[0042] Of course, at the same moment, at least two pump bodies of the first feeding member 310 or the second feeding member 320 can be connected to the conveying pipe 110 at the same time and start working simultaneously. A larger number of pump bodies can increase the discharging speed of the reaction liquid and improve the efficiency of sewage treatment.

[0043] It should be noted that, in this document, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element.

[0044] In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0045] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A precise chemical dosing device for sewage treatment, used for a reactor, characterized in that, The precise dosing device comprises: Feed pipe; A stirring member, the stirring member comprising a stirring body, a first feeding portion, and a second feeding portion, the stirring body being rotatably connected to the feeding pipe and slidingly arranged along the feeding pipe, the first feeding portion and the second feeding portion being connected to the stirring body and spaced apart along the central axis of the stirring body; In which, 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 a 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 a 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.

2. The precise drug dosing device according to claim 1, characterized in that, The stirring member also includes a stirring blade, which is connected to the stirring body. 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. 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.

3. The precise drug dosing device according to claim 2, wherein, The rotation directions of the stirring member in the first rotation state and the second rotation state are opposite, and the stirring member switches from the first rotation state to the second rotation state to change the driving force direction of the stirring blade; And / or, the rotational speed of the stirring member in the first rotational state is greater than the rotational speed of the stirring member in the second rotational state, and the stirring member switches from the first rotational state to the second rotational state to change the driving force of the stirring blade.

4. The precise drug dosing device according to claim 3, characterized in that, 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; 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, so that the stirring body can move to the second position relative to the feed pipe under the action of sewage.

5. 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.

6. The precise drug dosing device according to claim 5, 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.

7. The precise dosing device according to claim 1, characterized in that, The material conveying pipe is provided with a material conveying channel therein, and the pipe wall of the material conveying pipe is provided with a first through hole and a second through hole. The material conveying channel communicates with the first through hole and the second through hole. When the stirring main body is in the first position, the first through hole communicates with the first feeding part, and the second through hole is blocked from the second feeding part. When the stirring main body is in the second position, the second through hole communicates with the second feeding part, and the first through hole is blocked from the first feeding part; And / or, the material conveying pipe includes a first pipe body and a second pipe body. The first pipe body has a first channel, and the first channel communicates with the first feeding part. The second pipe body is sleeved outside the first pipe body, and a second channel is formed between the first pipe body and the second pipe body. The second channel communicates with the second feeding part.

8. A precise chemical dosing system for sewage treatment, characterized in that, The precise dosing system includes a reactor, a precise dosing device according to any one of claims 1-7, and a feeding device. The material conveying pipe communicates with the feeding device, and the stirring member extends into the reactor.

9. The precise drug dosing system according to claim 8, characterized in that, The feeding device further includes a first feeding member and a second feeding member. The precise dosing system further includes a valve body and a control member. The valve body is connected to the material conveying pipe. The valve body is used for selectively communicating with one of the first feeding member and the second feeding member. The stirring member is provided with a sensor, and the sensor is used for obtaining the relative position of the stirring member. 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 to enable the valve body to communicate with the first feeding member. When the stirring member is in the second position, the control member controls the valve body to enable the valve body to communicate with the second feeding member.

10. The precise drug dosing system according to claim 9, characterized in that, Both the first feeding member and the second feeding member are provided with at least two pump bodies. At the same moment, at least one pump body of the first feeding member or the second feeding member communicates with the material conveying pipe.

Images