Chemical adding device and method for wastewater treatment

Abstract

The invention relates to the technical field of water pollution treatment, in particular to a chemical feeding device and method for wastewater treatment, and the chemical feeding device for wastewater treatment comprises a platform, a stock bin and at least one chemical feeding assembly. The medicine feeding assembly comprises two conveying belts which are oppositely arranged; a plurality of grooves are uniformly formed in the belt surface of the conveying belt at intervals, and a pressure spring and a telescopic block are arranged in each groove; in the transmission process of the conveyor belt, the telescopic block retracts into the groove when entering the stock bin from bottom to top, and gradually extends out of the groove when moving in the stock bin, so that the side wall of the telescopic block bears medicine powder; after moving upwards to the top end, the telescopic block turns to be opposite to the belt face of the other conveying belt and abuts against the belt face of the other conveying belt, and medicine powder is clamped between the two conveying belts and fed into water from top to bottom. According to the scheme, the density of medicine powder obtained by stretching out the telescopic block through the compression spring tends to be consistent, and therefore the precision and uniformity of the medicine powder are improved.

Description

Technical Field

[0001] This invention relates to the field of water pollution control technology, and in particular to a dosing device and method for wastewater treatment. Background Technology

[0002] In the field of water pollution control, effective wastewater treatment is a crucial step in protecting the water environment and conserving water resources. Adding chemical powders to wastewater to achieve functions such as flocculation, sedimentation, or disinfection is an indispensable means of improving the efficiency of water pollution control and water quality.

[0003] However, in practical applications, existing technologies generally suffer from the following problems: On the one hand, the powder stored in the silo is prone to clumping due to its own gravity and changes in ambient humidity, leading to inaccurate dosage control and poor uniformity during dosing, which in turn affects the stability and treatment effect of subsequent processes. On the other hand, the traditional method of directly adding powder to the wastewater surface easily causes the powder to agglomerate on the water surface, making it difficult to disperse quickly and evenly in the wastewater. This not only results in low powder dissolution efficiency but also affects its sufficient contact with pollutants, thereby reducing the treatment effect and making it difficult to fully exert its intended purification efficiency. These problems restrict the accuracy and efficiency of the dosing process and have a significant impact on improving the overall effectiveness of water pollution treatment processes. Summary of the Invention

[0004] One objective of this invention is to improve the accuracy and uniformity of drug dispensing.

[0005] Another objective of this invention is to improve the dissolution efficiency of the pharmaceutical powder.

[0006] Specifically, the present invention provides a dosing device for wastewater treatment, comprising: a platform, a hopper, and at least one dosing assembly; a support extending into the wastewater is disposed below the platform; the hopper is disposed above the platform and contains chemical powder; the at least one dosing assembly includes two oppositely arranged conveyor belts capable of synchronously driving in opposite directions and two baffles; the conveyor belts are vertically arranged, and their axes are arranged horizontally; the top of the conveyor belts extends into the hopper, and the bottom extends below the platform; the two baffles are vertically arranged in the hopper and respectively shield the two ends of the two conveyor belts located in the hopper; the conveyor belts are positioned along the belt surface... Multiple grooves are evenly spaced along the transmission direction. Each groove contains a compression spring and a telescopic block connected to the spring, and the shape of the telescopic block matches the shape of the groove. Multiple grooves on two opposing conveyor belts are staggered. During the conveyor belt transmission process, the telescopic block retracts into the groove when it enters the hopper from bottom to top, and gradually extends out of the groove as it moves in the hopper, so that the side wall of the telescopic block carries the medicine powder. After the telescopic block moves to the top, it turns to face the belt surface of another conveyor belt and abuts against the belt surface of another conveyor belt, so that the medicine powder is clamped between the two conveyor belts and sent into the water from top to bottom.

[0007] Furthermore, the conveyor belt extends into the water below the platform, and baffles are provided at both ends of the conveyor belt; the conveyor belt is configured to stop for a preset time after each preset distance of transmission; the baffles are configured to open when the conveyor belt stops transmission, so that the powder between the conveyor belts extending into the water dissolves into the water simultaneously.

[0008] Furthermore, the baffles are elastic sheets; the conveyor belt is configured to rotate around the axis of the hopper after the transmission stops, causing the disturbed water flow to break open the baffles and dissolve the powder between the conveyor belts into the water.

[0009] Furthermore, the hopper is rotatably mounted on the platform, and a first motor is installed on the platform. The first motor drives the hopper to rotate via a belt, thereby driving the conveyor belt to rotate.

[0010] Furthermore, a guide plate is provided on the outer conveyor belt, located at the end of the conveyor belt facing the direction of rotation.

[0011] Furthermore, the telescopic block is wavy.

[0012] Furthermore, an intermediate warehouse is set up between the silo and the platform.

[0013] Furthermore, the walls of the intermediate compartment are hollow, and a heating device is installed inside.

[0014] Furthermore, the dosing device for wastewater treatment also includes a second motor, which is installed inside the hopper and connected to the drive shaft of the conveyor belt via a transmission gear to drive the conveyor belt.

[0015] The present invention also provides a dosing method, which is implemented using any of the above-mentioned dosing devices for wastewater treatment. The dosing method includes the following steps: injecting powder into the silo; controlling the two conveyor belts in the dosing assembly to drive synchronously in opposite directions, so that the powder in the silo is clamped between the two conveyor belts and fed into the water from top to bottom.

[0016] The beneficial effects of this invention are: The present invention provides a dosing device for wastewater treatment. By spaced-apart telescopic blocks on the conveyor belt surface, and utilizing the elastic force of compression springs, the telescopic blocks extend to pick up the powder in areas where the powder density is relatively uniform, thereby improving the accuracy and uniformity of powder dispensing. The powder is added in small, separate amounts, resulting in better dissolution and preventing large-scale agglomeration in the water, thus ensuring effective dosing and improving the efficiency of water pollution treatment.

[0017] Furthermore, the dosing device for wastewater treatment of the present invention, by setting a conveyor belt to extend into the water and controlling the baffle to open when the conveyor belt stops for a preset time, allows the powder between the conveyor belts extending into the water to dissolve into the water simultaneously, thereby improving the uniformity of dosing in the height direction of the wastewater, thus improving the dosing effect and enhancing the water pollution treatment effect.

[0018] Furthermore, the dosing device for wastewater treatment of the present invention, by setting an intermediate silo between the silo and the platform, and installing a heating device in the silo wall of the intermediate silo, ensures that the conveyor belt and the silo remain dry, thereby reducing the risk of moisture and clumping of the powder in the silo.

[0019] The dosing method of the present invention, when applied to the aforementioned dosing device for wastewater treatment, also possesses the beneficial technical effects of the aforementioned dosing device for wastewater treatment. Attached Figure Description

[0020] The following sections will describe some specific embodiments of the invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. In the drawings: Figure 1 This is a schematic diagram of a dosing device for wastewater treatment according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a dosing device for wastewater treatment according to an embodiment of the present invention; wherein, part of the structure of the silo is omitted. Figure 3 This is a top view schematic diagram of a dosing device for wastewater treatment according to an embodiment of the present invention; wherein, part of the structure of the silo is omitted; Figure 4 It is along Figure 3A schematic cross-sectional view taken by the cutting line AA in the diagram; Figure 5 yes Figure 4 A schematic enlarged view of region B in the middle; Figure 6 yes Figure 4 A schematic enlarged view of region C in the middle; Figure 7 This is a bottom view schematic diagram of a dosing device for wastewater treatment according to an embodiment of the present invention; wherein, part of the structure of the silo is omitted; Figure 8 yes Figure 7 A schematic enlarged view of region D in the middle; Figure 9 yes Figure 8 A schematic enlarged view of region E in the middle; Figure 10 This is a schematic diagram of the structure of a drug delivery assembly, a second motor, and a transmission gear according to an embodiment of the present invention. Figure 11 This is a schematic diagram of the structure of the telescopic block and the compression spring according to an embodiment of the present invention; Figure 12 This is a flowchart of a drug dosing method according to an embodiment of the present invention.

[0021] in: 100. Platform; 110. Support frame; 120. First motor; 121. Belt; 200. Hopper; 210. Base plate; 211. First chamfer; 220. Feed inlet; 230. Support plate; 300. Drug delivery assembly; 310. Conveyor belt; 311. Groove; 312. Compression spring; 313. Telescopic block; 3131. Second chamfer; 314. Baffle; 315. Drive shaft; 316. Pinion; 317. Support plate; 318. Guide plate; 320. Baffle; 400. Second motor; 410. Transmission gear; 420. Drive gear; 500. Intermediate hopper; 510. Heating device; 520. Pulley. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0023] The terms "first" and "second" used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically stated, this indicates that other features are not excluded and may be further included.

[0024] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] The following reference Figures 1 to 12 This invention describes a dosing device and method for wastewater treatment.

[0026] This embodiment first provides a dosing device for wastewater treatment.

[0027] A dosing device for wastewater treatment may generally include: a platform 100, a hopper 200, and at least one dosing assembly 300.

[0028] A support 110 extending into the wastewater is provided below the platform 100. A hopper 200 is located above the platform 100 and stores the powder. At least one delivery assembly 300 is vertically arranged in the hopper 200. The at least one delivery assembly 300 includes two oppositely arranged conveyor belts 310 that can drive synchronously in opposite directions and two baffles 320. The conveyor belts 310 are vertically arranged, and their axes are arranged in the horizontal direction. The top of the conveyor belts 310 extends into the hopper 200, and the bottom extends below the platform 100. The two baffles 320 are vertically arranged in the hopper 200 and respectively cover the two ends of the two conveyor belts 310 located in the hopper 200. A plurality of grooves 311 are evenly arranged on the surface of the conveyor belts 310 along the transmission direction. Each groove 311 is provided with a compression spring 312 and a telescopic block 313 connected to the compression spring 312, and the shape of the telescopic block 313 is adapted to the shape of the groove 311. Multiple grooves 311 on two opposing conveyor belts 310 are staggered. During the transmission of the conveyor belts 310, the telescopic block 313 retracts into the groove 311 as it enters the hopper 200 from bottom to top, and gradually extends out of the groove 311 as it moves within the hopper 200, so that the side wall (i.e., the upper surface of the telescopic block 313) carries the powder. After the telescopic block 313 moves to the top, it turns to face the belt surface of the other conveyor belt 310 and abuts against the belt surface of the other conveyor belt 310, so that the powder is clamped between the two conveyor belts 310 and sent into the water from top to bottom. The conveyor belts 310 operate at a low speed during operation.

[0029] like Figure 2 As shown, a medicine feeding assembly 300 is vertically arranged in the hopper 200. The bottom ends of the two oppositely arranged conveyor belts 310 of the medicine feeding assembly 300 pass through the hopper 200 and extend below the platform 100. When the two conveyor belts 310 move synchronously towards each other (i.e., Figure 6 (The left conveyor belt 310 rotates clockwise, and the right conveyor belt 310 rotates counterclockwise.) The powder in the hopper 200 is held between the two opposing conveyor belts 310 and sent from top to bottom into the wastewater below.

[0030] The medicinal powder accumulated in the hopper 200 gradually becomes looser from bottom to top. Multiple telescopic blocks 313 are evenly spaced on the surface of the conveyor belt 310. When the telescopic blocks 313 enter the hopper 200, they retract into the grooves 311. As the telescopic blocks 313 move upwards within the hopper 200 with the conveyor belt 310, the medicinal powder they come into contact with gradually becomes looser (i.e., the pressure from the medicinal powder on the telescopic blocks 313 gradually decreases). Under the action of the compression spring 312, the telescopic blocks 313 gradually extend out of the grooves 311. Since the elastic force of the compression spring 312 is constant, the degree of looseness of the medicinal powder collected by the sidewall of the telescopic block 313 tends to be uniform when it extends. Because the telescopic blocks 313 have uniform dimensions and structure, the amount of medicinal powder collected by each telescopic block 313 tends to be uniform, thereby improving the accuracy of the amount of medicinal powder collected by each telescopic block 313 and improving the uniformity of the medicinal powder amount.

[0031] Baffle 320 is used to prevent powder from entering between the two conveyor belts 310 from both ends. As the conveyor belts 310 move, the telescopic block 313, after reaching its top, begins to move downwards and approach the opposite conveyor belt 310 until it comes into contact with the surface of the other conveyor belt 310. At this point, the powder collected on the side wall of the telescopic block 313 falls onto the side wall of the adjacent telescopic block 313 below, which is located on the opposite conveyor belt 310. The powder is thus trapped between the surfaces of the two conveyor belts 310.

[0032] When the powder is fed between the two conveyor belts 310, the two oppositely arranged conveyor belts 310 can also crush the larger powder particles, thereby improving the dissolution efficiency of the powder after it enters the water.

[0033] In this embodiment, multiple telescopic blocks 313 are used to uniformly and quantitatively dispense the medicine at intervals, thereby adding the medicine to the wastewater in a quantitative manner at intervals. The medicine powder is added in small, separate amounts, resulting in better dissolution and preventing large amounts of powder from agglomerating in the water, thus ensuring the effectiveness of the dosing and improving the efficiency of water pollution treatment.

[0034] like Figure 6 As shown, a first chamfer 211 is provided on the wall surface of the bottom plate 210 of the hopper 200 where it contacts the telescopic block 313, and a second chamfer 3131 is also provided on the end face of the telescopic block 313. This allows the telescopic block 313 to be pressed back into the groove 311 by the bottom plate 210 of the hopper 200 under the action of the first chamfer 211 and the second chamfer 3131 when it enters the hopper 200 from bottom to top. A support plate 317 is provided in the hollow area inside the conveyor belt 310 to prevent the belt surface of the conveyor belt 310 from being concave under the pressure of the powder.

[0035] In some preferred embodiments, the telescopic block 313 may be provided with multiple compression springs 312, where "multiple" refers to two or more. For example... Figure 11 As shown, two compression springs 312 can be spaced apart on the telescopic block 313.

[0036] The conveyor belt 310 extends into the water below the platform 100, and baffles 314 are provided at both ends of the conveyor belt 310. The conveyor belt 310 is configured to stop for a preset time after traveling a preset distance. The baffles 314 are configured to open when the conveyor belt 310 stops traveling, so that the powder between the conveyor belts 310 extending into the water dissolves into the water simultaneously.

[0037] The baffle 314 is fixedly installed on the support plate 317 and is made of wear-resistant material.

[0038] In this embodiment, by setting a baffle 314, the powder held between the two conveyor belts 310 after entering the wastewater will not directly contact the wastewater. After the conveyor belts 310 stop moving, the baffle 314 opens, allowing the powder between the conveyor belts 310 that are submerged in the water to dissolve simultaneously. This ensures that the powder dissolves evenly in the wastewater along the height direction, thereby improving the dissolution efficiency and effect of the powder.

[0039] Preferably, the preset distance for each transmission of the conveyor belt 310 can be set according to the length of the conveyor belt 310 extending into the water. This ensures that after each transmission of the preset distance, the portion of the conveyor belt 310 extending into the water carries the medicine powder, thereby improving the dosing efficiency and effect.

[0040] The baffle 314 is an elastic thin sheet. The conveyor belt 310 is configured to rotate about the axis of the hopper 200 after the transmission stops, so that the disturbed water flow can push open the baffle 314 and dissolve the powder between the conveyor belts 310 into the water.

[0041] like Figure 9 As shown, baffles 314 on two opposing conveyor belts 310 face each other and abut at their tails, forming a Y-shape. The V-shaped opening formed when the two baffles 314 abut is oriented in the same direction as the direction in which the conveyor belts 310 rotate around the axis of the hopper 200. Furthermore, the baffles 314 are preferably made of rubber.

[0042] In this embodiment, the baffle 314 is set as an elastic thin sheet. The water flow disturbed by the rotation of the conveyor belt 310 then pushes the baffle 314 open. This not only makes operation simple and stable, but also improves the dissolution efficiency of the powder by utilizing the impact of the water flow. Furthermore, the rotation of the conveyor belt 310 also improves the uniformity of the powder in the horizontal direction. The powder is more evenly distributed both vertically and horizontally, resulting in better dissolution and thus improving the water pollution treatment effect.

[0043] The hopper 200 is rotatably mounted on the platform 100. The platform 100 is equipped with a first motor 120. The first motor 120 drives the hopper 200 to rotate via the belt 121, thereby driving the conveyor belt 310 to rotate.

[0044] In this embodiment, by setting a first motor 120 and a belt 121, the rotation of the motor drives the rotation of the hopper 200, thereby driving the conveyor belt 310 running through the hopper 200 to rotate around the axis of the hopper 200. This not only has a simple structure and low cost, but also is easy to operate and runs stably.

[0045] A guide plate 318 is provided on the outer conveyor belt 310, and the guide plate 318 is located at the end of the conveyor belt 310 facing the rotation direction.

[0046] like Figure 8 As shown, the guide plate 318 is disposed on the conveyor belt 310 located on the outer side (i.e., the side away from the center of rotation).

[0047] In this embodiment, by setting a guide plate 318 at the end of the outer conveyor belt 310 facing the rotation direction, the water flow can better pass through the gap between the two conveyor belts 310 under the guidance of the guide plate 318 when the conveyor belt 310 rotates and disturbs the water flow, thereby improving the dissolution efficiency and dissolution effect of the medicine powder.

[0048] The telescopic block 313 is wavy.

[0049] In this embodiment, the telescopic block 313 is set to a wave shape, so that when the water flows through the gap between the two conveyor belts 310, it flows along the wave shape of the telescopic block 313 to generate eddies, thereby further improving the dissolution efficiency and dissolution effect of the powder.

[0050] An intermediate silo 500 is set between the silo 200 and the platform 100.

[0051] In this embodiment, by setting an intermediate silo 500 between the silo 200 and the platform 100, the water vapor generated by the wastewater below the platform 100 is prevented from entering the silo 200, thereby reducing the risk of the powder in the silo 200 becoming damp and clumping together.

[0052] like Figure 1-2As shown, in some embodiments, the hopper 200 is conical, with a feed inlet 220 on its side. The feed inlet 220 is preferably lower than the top surface of the conveyor belt 310 to prevent the powder in the hopper 200 from accumulating above the conveyor belt 310. The bottom plate 210 of the hopper 200 and the wall of the intermediate hopper 500 are fixedly connected or integrally formed. The belt 121 can be fitted onto the outside of the wall of the intermediate hopper 500, and a pulley 520 is fitted onto the outside of the wall. The first motor 120 drives the pulley 520 to rotate via the belt 121, which in turn drives the intermediate hopper 500 to rotate, which in turn drives the hopper 200 and the drug delivery assembly 300 to rotate.

[0053] The intermediate compartment 500 has hollow walls, and a heating device 510 is installed inside.

[0054] In this embodiment, by installing a heating device 510 in the wall of the intermediate silo 500, the intermediate silo 500 is heated, which further reduces the risk of moisture entering the material silo 200. At the same time, the conveyor belt 310 that leaves the wastewater and moves to the intermediate silo 500 is dried, thereby further reducing the risk of the powder in the material silo 200 becoming damp and clumping.

[0055] After the conveyor belt 310 stops driving, during the process of the conveyor belt 310 rotating around the axis of the hopper 200, the water droplets attached to the conveyor belt 310 located in the intermediate hopper 500 will be removed from the conveyor belt 310 under the action of centrifugal force, and at the same time the conveyor belt 310 will be dried under the continuous heating of the intermediate hopper 500.

[0056] In some embodiments, the heating device 510 may be a heating wire (adjustable from 0°C to 500°C). In other embodiments, the heating device 510 may be a heating element. In still other embodiments, the conveyor belt 310 may be made of a hydrophobic material.

[0057] Preferably, the height of the intermediate chamber 500 is greater than or equal to a preset distance, so that after the conveyor belt 310 leaves the wastewater and enters the intermediate chamber 500, it can stay in the intermediate chamber 500 for a preset time, thereby ensuring the drying effect.

[0058] The dosing device for wastewater treatment may also generally include a second motor 400. The second motor 400 is located inside the hopper 200 and is connected to the drive shaft 315 of the conveyor belt 310 via a transmission gear 410, for driving the conveyor belt 310.

[0059] The solution in this embodiment utilizes a motor and transmission gear 410 to drive the transmission of the conveyor belt 310, which is not only simple in structure and low in cost, but also easy to operate and stable in operation.

[0060] In some embodiments, two drug delivery assemblies 300 may be installed on the hopper 200 to improve drug delivery efficiency. The two drug delivery assemblies 300 are symmetrically arranged about the axis of the hopper 200, making the rotation of the drug delivery assemblies 300 more stable when the hopper 200 drives them. Figure 2 As shown, the second motor 400 can be fixed inside the hopper 200 by the support plate 230, and simultaneously drives the two transmission gears 410 to rotate through the drive gear 420, thereby simultaneously driving the conveyor belts 310 in the two drug delivery assemblies 300. The two drive shafts 315 of the two opposing conveyor belts 310 in each drug delivery assembly 300 can be simultaneously driven by the meshing of the pinion 316.

[0061] The specific working process of the dosing device for wastewater treatment provided by the present invention will be described in conjunction with the above embodiments: First, the powder is injected into the hopper 200 through the feed inlet 220. Then, the second motor 400 is started to control the two conveyor belts 310 in the feeding assembly 300 to rotate synchronously in opposite directions.

[0062] When the second motor 400 controls the movement of the conveyor belt 310, the telescopic block 313 on the conveyor belt 310 moves upward after being removed from the wastewater and enters the intermediate silo 500, where it is dried. As the telescopic block 313 continues to move upward into the hopper 200, it is pressed against the bottom plate 210 of the hopper 200, thus retracting into the groove 311. As the telescopic block 313 continues to move upward in the hopper 200, as the density of the powder decreases and the pressure of the powder on the telescopic block 313 decreases, the telescopic block 313 gradually extends out of the groove 311 under the elastic force of the compression spring 312, so that its side wall carries the powder. After the telescopic block 313 moves to the top surface of the conveyor belt 310, the powder on its side wall falls onto the adjacent telescopic block 313 on another conveyor belt 310 below it, and is held between the belt surfaces of the two conveyor belts 310. As the telescopic block 313 continues to move downwards, it detaches from the hopper 200 and enters the intermediate hopper 500. Then, it passes through the intermediate hopper 500 and the platform 100 before entering the wastewater below the platform 100. After the telescopic block 313 enters the wastewater and moves to the bottom of the conveyor belt 310, it turns to the side and moves upwards to detach from the wastewater, thus repeating the cycle.

[0063] The second motor 400 controls the conveyor belt 310 to move a preset distance and then stop for a preset time. During the time the second motor 400 stops, the first motor 120 starts, driving the hopper 200 to rotate via the belt 121, which in turn drives the conveyor belt 310, which runs through the hopper 200, to rotate around its axis. The rotation of the conveyor belt 310 in the wastewater disturbs the wastewater, causing it to breach the baffle 314 and flow through the gap between the two conveyor belts 310, thereby dissolving the powder between the two conveyor belts in the wastewater. Simultaneously, the conveyor belt 310 in the intermediate hopper 500 is dried.

[0064] like Figure 12 As shown, this embodiment also provides a dosing method for wastewater treatment, applicable to any of the above-described wastewater treatment dosing devices. The dosing method for wastewater treatment generally includes the following steps: S100, inject the powder into the silo 200.

[0065] S200, the two conveyor belts 310 in the drug delivery assembly 300 are driven synchronously towards each other, so that the powder in the hopper 200 is clamped between the two conveyor belts 310 and sent into the water from top to bottom.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A dosing device for wastewater treatment, characterized by, It comprises: a platform, below which a support is arranged to extend into wastewater; a hopper arranged above the platform, in which a medicament powder is stored; at least one medicament delivery assembly, which comprises two oppositely arranged conveyors that can be synchronously driven towards each other and two baffles; the conveyors are vertically arranged, and their axes are arranged in a horizontal direction; the top of the conveyors extends into the hopper, and the bottom extends below the platform; the two baffles are vertically arranged in the hopper and respectively shield the two ends of the two conveyors located in the hopper; a plurality of grooves are uniformly arranged on the belt surface of the conveyors along the driving direction; a compression spring and a telescopic block connected with the compression spring are arranged in each groove, and the shape of the telescopic block is matched with the shape of the groove; the grooves on the two opposite conveyors are arranged alternately; during the driving of the conveyors, the telescopic blocks retract into the grooves when entering the hopper from bottom to top, and gradually extend out of the grooves when moving in the hopper, so that the side walls of the telescopic blocks carry the medicament powder; after the telescopic blocks move to the top, they are turned to be opposite to and abut against the belt surface of the other conveyor, so that the medicament powder is clamped between the two conveyors and delivered into water from top to bottom.

2. The medicament feeding device for wastewater treatment according to claim 1, wherein the conveyors extend into the water area below the platform, and the two ends of the conveyors are provided with flaps; the conveyors are configured to stop for a preset time after driving for a preset distance; the flaps are configured to open when the conveyors stop driving, so that the medicament powder between the conveyors in the water is dissolved into the water at the same time.

3. The medicament feeding device for wastewater treatment according to claim 2, wherein the flaps are elastic sheets; the conveyors are configured to rotate around the axis of the hopper after stopping driving, so that the disturbed water flow pushes away the flaps and dissolves the medicament powder between the conveyors into the water.

4. The medicament feeding device for wastewater treatment according to claim 3, wherein the hopper is rotatably arranged on the platform, and a first motor is arranged on the platform to drive the hopper to rotate through a belt, thereby driving the conveyors to rotate.

5. The medicament feeding device for wastewater treatment according to claim 3, wherein a flow guide plate is arranged on the outer conveyor, and the flow guide plate is located at one end of the conveyor towards the rotating direction.

6. The medicament feeding device for wastewater treatment according to claim 3, wherein the telescopic blocks are in a wave shape.

7. The medicament feeding device for wastewater treatment according to claim 3, wherein an intermediate hopper is arranged between the hopper and the platform.

8. The medicament feeding device for wastewater treatment according to claim 7, wherein the wall of the intermediate hopper is hollow, and a heating device is arranged in the wall.

9. The dosing device for wastewater treatment according to claim 1, characterized in that, It further comprises: a second motor arranged in the hopper, which is connected with the driving shaft of the conveyors through a transmission gear to drive the conveyors to drive.

10. A method for dosing for wastewater treatment, characterized by, The dosing device for wastewater treatment of any one of claims 1-9, comprising the following steps: S100, injecting the medicine powder into the hopper; S200, controlling the two conveyors in the medicine feeding assembly to drive synchronously in opposite directions, so that the medicine powder in the hopper is clamped between the two conveyors and fed into the water from top to bottom.

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