Powdered reagent dosing device and method for coal slurry wastewater treatment

Abstract

This invention discloses a powdered reagent dosing device and method for treating coal slurry wastewater. The powdered reagent dosing device includes a dispensing mechanism, which includes a housing containing three sequentially connected dispensing units. Each dispensing unit includes a tank, and a scraper is installed on the inner bottom wall of the tank. The scraper includes a pair of scraping arms that adhere to the side wall of the tank, and a cross arm is connected to the bottom of the pair of scraping arms. A scraping motor is fixedly connected to the bottom of the outer side of the tank, and the output shaft of the scraping motor passes through the bottom wall of the tank and is fixedly connected to the end face of the cross arm away from the scraping arm. By setting up the scraping arms, some of the deposited powdered reagent and the powdered reagent adhering to the tank wall are stirred and melted, and added back to the reagent to be prepared, solving the problems of insufficient accuracy in the amount of powdered reagent added and unstable reagent concentration output in the prior art.

Description

Technical Field

[0001] This invention belongs to the field of coal slurry wastewater treatment technology, and relates to a powdered reagent dosing device for coal slurry wastewater treatment, as well as a method for dosing powdered reagents. Background Technology

[0002] Coal slurry wastewater refers to wastewater generated during the production process of the coal industry. The production process includes coal mining, coal washing, coal processing and related supporting links. In the coal slurry wastewater treatment process, PAC and PAM agents need to be added to flocculate impurities in the water into large particles and settle quickly. The addition of agents is involved in the coal slurry wastewater treatment process. In particular, for some powdered agents, it is necessary to prepare a solution with water before adding them.

[0003] Due to the characteristics of the reagents and environmental factors, such as high water content and the absorption of moisture from the air by powdered reagents, the reagents may stick to the walls of the dosing chamber, preventing them from quickly entering the dissolving tank. Even after the powdered reagents are dissolved, some may not be completely dissolved before being delivered to the dosing point, resulting in sedimentation and adhesion to the dissolving tank walls. This leads to inaccurate dosage and unstable reagent concentration output. Furthermore, the dosing hopper capacity of the dosing device is too small, requiring frequent manual pouring of powdered reagents into the dosing chamber by on-site workers, resulting in low automation. Additionally, the addition of reagents can cause some to splash onto the dosing chamber and equipment, leading to inaccurate dosing and blockages in the dosing chamber and equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a powdered reagent dosing device for coal slurry wastewater treatment, which solves the problem in the prior art where some reagents are deposited and adhere to the wall of the dissolving tank, resulting in insufficient accuracy of reagent addition and unstable reagent concentration output.

[0005] The present invention also aims to provide a method for adding powdered drugs, which solves the problem in the prior art that some drugs are deposited and adhere to the wall of the dissolving tank, resulting in insufficient accuracy of drug addition and unstable drug concentration output.

[0006] The technical solution adopted by the powdered agent dosing device for coal slurry wastewater treatment of the present invention is as follows: it includes a dosing mechanism, which includes a box body. The box body is provided with three dosing units connected in sequence. Each dosing unit includes a tank body. A scraper is installed on the inner bottom wall of the tank body. The scraper includes a pair of scraper arms that fit against the side wall of the tank body. A cross arm is connected to the bottom of the pair of scraper arms. A scraper motor is fixedly connected to the outer bottom of the tank body. The output shaft of the scraper motor passes through the bottom wall of the tank body and is fixedly connected to the end face of the cross arm away from the scraper arm.

[0007] The invention is further characterized by:

[0008] Above the dispensing mechanism is a delivery mechanism, which includes a fixed rod located above the dispensing mechanism. The fixed rod has a track along its axial direction, and a hanging scale is slidably connected to the track. A sliding rod is fixedly connected to the end of the hanging scale away from the fixed rod, and a dosing tank is hinged to the end of the sliding rod away from the hanging scale. The top of the dosing tank has a dosing inlet. The delivery mechanism also includes a screw conveyor. A guide motor is installed at the bottom of the screw conveyor. A dosing component and an air blowing component are arranged sequentially along the output direction of the guide motor on the screw conveyor. An output pipe is provided at the end of the screw conveyor away from the guide motor, and the outlet of the output pipe is higher than the dosing inlet of the dosing tank.

[0009] The dosing assembly includes a drug storage chamber, a heating grid and a shaker installed on the side wall of the drug storage chamber, a level gauge fixed to the inner wall of the drug storage chamber, and a drug storage chamber regulating valve installed at the output end of the drug storage chamber.

[0010] A level gauge is fixed to the side wall of the tank, and a stirring motor is fixed to the top of the tank. The output end of the stirring motor is connected to a stirrer, which extends through the top wall of the tank into the interior of the tank. A discharge hole is provided at the bottom of the tank.

[0011] The tank has a feed hopper at the top, and a receiving box with an opening facing the feed hopper is fixed to the side wall of the feed hopper. A drive motor is fixedly connected to the side of the receiving box away from the feed hopper. A spraying device is installed inside the feed hopper. The spraying device includes a water pump. The water pump input is connected to an external water source, and the water pump output is connected to a spraying pipe. The other end of the spraying pipe is connected to a nozzle. A first regulating valve and a first flow meter are installed on the spraying pipe. A drain hole coaxial with the opening of the feed hopper is opened on the nozzle. A connecting port is opened on the side wall where the feed hopper connects to the receiving box. The shape of the connecting port matches the shape of the nozzle. A lead screw passes through the nozzle. One end of the lead screw is driven and connected to the drive motor inside the receiving box. The nozzle panel is located on the side away from the tank.

[0012] The dosing units are the first dosing unit, the second dosing unit, and the third dosing unit along the connection direction. The top wall of the tank of the first dosing unit is provided with a water distribution pipe. The end of the water distribution pipe away from the tank of the first dosing unit is connected to the spray pipe. A second regulating valve and a second flow meter are installed on the water distribution pipe.

[0013] The bottom of the tank of the third drug preparation unit is provided with a drug outlet pipe, and a mesh is fixed to one end of the inner wall of the drug outlet pipe near the tank of the third drug preparation unit.

[0014] The air blowing assembly includes an air blowing pump, the output end of which is connected to the pipe wall of the screw conveyor, and the input end of which is connected to an air storage tank.

[0015] The technical solution adopted in the powdered drug dosing method of the present invention is as follows:

[0016] Step 1: Calculate the required dosage of powdered medicine and water according to the needs, and add the medicine and water to the container of the dispensing unit to make the medicine solution;

[0017] Step 2: Start the scraper motor. The output of the scraper motor drives the scraper to rotate. The scraper scrapes off the powdered medicine sticking to the side wall of the dispensing unit and dissolves it in the medicine solution.

[0018] The beneficial effects of this invention are:

[0019] The powdered reagent dosing device for coal slurry wastewater treatment of the present invention, by setting up a scraper arm, stirs and melts part of the deposited powdered reagent and the powdered reagent adhering to the tank wall, and adds it back to the reagent to be prepared, thus solving the problems of insufficient accuracy of powdered reagent addition and unstable reagent concentration output in the prior art. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the powdered reagent dosing device for coal slurry wastewater treatment according to the present invention;

[0021] Figure 2 This is a schematic diagram of the water supply system structure of the powdered reagent dosing device for coal slurry wastewater treatment according to the present invention;

[0022] Figure 3 The present invention relates to a powdered reagent dosing device for treating coal slurry wastewater. Figure 2 Schematic diagram of the central nozzle structure;

[0023] Figure 4 The present invention relates to a powdered reagent dosing device for treating coal slurry wastewater. Figure 2 Schematic diagram of the central grid structure;

[0024] Figure 5 This is a top view of the tank of the powdered reagent dosing device for coal slurry wastewater treatment according to the present invention.

[0025] In the diagram: 1. Dispensing mechanism; 101. Box; 102. Dispensing unit; 1021. Level gauge; 1022. Stirring motor; 1023. Stirrer; 1024. Discharge port; 1025. Feed hopper; 1026. Container; 1027. Concentration meter; 103. Tank; 1031. Scraper; 1032. Scraper arm; 1033. Horizontal arm; 1034. Scraper motor; 104. Spraying device; 1041. Spray pipeline; 1042. Spray head; 1043. First regulating valve; 1044. First flow meter; 1045. Drain hole; 105. First dispensing unit; 1051. 1. Water distribution pipeline; 1052. Second regulating valve; 1053. Second flow meter; 106. Second dosing unit; 107. Third dosing unit; 1071. Dosing pipe; 1072. Mesh screen; 2. Dosing mechanism; 201. Fixed rod; 202. Hanging scale; 203. Sliding rod; 204. Dosing tank; 205. Screw conveyor; 2051. Material guide motor; 2052. Output pipe; 3. Dosing assembly; 301. Dosing silo; 3011. Level gauge; 3012. Dosing silo regulating valve; 302. Heating mesh; 303. Vibrator; 4. Air blowing assembly; 401. Air blowing pump; 402. Air storage tank. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0027] The powdered reagent dosing device for coal slurry wastewater treatment of the present invention, such as Figure 1 As shown, the device includes a dispensing mechanism 1, which includes a housing 101. The housing 101 contains three sequentially connected dispensing units 102. Each dispensing unit 102 includes a container 103, as shown below. Figure 5 As shown, a scraper 1031 is installed on the inner bottom wall of the tank 103. The scraper 1031 includes a pair of scraping arms 1032 that fit against the side wall of the tank 103. A cross arm 1033 is connected to the bottom of the pair of scraping arms 1032. A scraping motor 1034 is fixedly connected to the bottom of the outer side of the tank 103. The output shaft of the scraping motor 1034 passes through the bottom wall of the tank 103 and is fixedly connected to the end face of the cross arm 1033 away from the scraping arm 1032.

[0028] A drug delivery mechanism 2 is provided above the drug dispensing mechanism 1. The drug delivery mechanism 2 includes a fixed rod 201 located above the drug dispensing mechanism 1. The fixed rod 201 has a track along the axial direction. A hanging scale 202 is slidably connected to the track. A sliding rod 203 is fixedly connected to the end of the hanging scale 202 away from the fixed rod 201. A drug addition box 204 is hinged to the end of the sliding rod 203 away from the hanging scale 202. A drug inlet is provided at the top of the drug addition box 204. The drug delivery mechanism 2 also includes a screw conveyor 205. A guide motor 2051 is installed at the bottom of the screw conveyor 205. A drug addition component 3 and an air blowing component 4 are arranged sequentially along the output direction of the guide motor 2051 on the screw conveyor 205. An output pipe 2052 is provided at the end of the screw conveyor 205 away from the guide motor 2051. The outlet of the output pipe 2052 is higher than the drug inlet of the drug addition box 204.

[0029] The dosing assembly 3 includes a drug storage chamber 301, a heating grid 302 and an oscillator 303 installed on the side wall of the drug storage chamber 301, a level gauge 3011 fixedly connected to the inner wall of the drug storage chamber 301, and a drug storage chamber regulating valve 3012 installed at the output end of the drug storage chamber 301.

[0030] like Figure 2 As shown, a level gauge 1021 is fixedly connected to the side wall of the tank 103, a stirring motor 1022 is fixedly connected to the top of the tank 103, a stirrer 1023 is connected to the output end of the stirring motor 1022, the stirrer 1023 extends into the tank 103 through the top wall of the tank 103, and a discharge hole 1024 is provided at the bottom of the tank 103.

[0031] like Figure 3 As shown, a feed hopper 1025 is provided on the top of the tank body 103. A receiving box 1026 with an opening facing the feed hopper 1025 is fixedly connected to the side wall of the feed hopper 1025. A drive motor is fixedly connected to the side of the receiving box 1026 away from the feed hopper 1025. A spraying device 104 is installed inside the feed hopper 1025. The spraying device 104 includes a water pump. The water pump input end is connected to an external water source, and the water pump output end is connected to a spraying pipe 1041. The other end of the spraying pipe 1041 is connected to a spray nozzle 1042. A first regulating valve 1043 and a first flow meter 1044 are installed on the channel 1041. A drain hole 1045 coaxial with the opening of the feed hopper 1025 is provided on the nozzle 1042. A connecting port is provided on the side wall of the feed hopper 1025 connected to the receiving box 1026. The shape of the connecting port matches the shape of the nozzle 1042. A lead screw is passed through the nozzle 1042. One end of the lead screw is connected to the drive motor in the receiving box 1026. The nozzle panel of the nozzle 1042 is located on the side away from the tank 103.

[0032] The dosing units 102 are respectively a first dosing unit 105, a second dosing unit 106, and a third dosing unit 107 along the connection direction. A water distribution pipe 1051 is provided through the top wall of the tank 103 of the first dosing unit 105. The end of the water distribution pipe 1051 away from the tank 103 of the first dosing unit 105 is connected to the spray pipe 1041. A second regulating valve 1052 and a second flow meter 1053 are installed on the water distribution pipe 1051.

[0033] The bottom of the tank 103 of the third drug preparation unit 107 is provided with a drug outlet pipe 1071, and a mesh 1072 is fixedly connected to one end of the inner wall of the drug outlet pipe 1071 near the tank 103 of the third drug preparation unit 107.

[0034] The air blowing assembly 4 includes an air blowing pump 401, the output end of which is connected to the pipe wall of the screw conveyor 205, and the input end of which is connected to an air storage tank 402.

[0035] The powdered reagent dosing method of the present invention uses a powdered reagent dosing device for coal slurry wastewater treatment, and the specific steps are as follows:

[0036] Step 1: Calculate the required dosage of powdered medicine and water according to the needs, and add the medicine and water to the container 103 of the dispensing unit 102 to make a medicine solution;

[0037] Step 2: Start the scraping motor 1034. The output end of the scraping motor 1034 drives the scraping plate 1031 to rotate. The scraping plate 1031 scrapes off the powdered medicine adhering to the side wall of the tank 103 of the dispensing unit 102 and dissolves it in the medicine solution.

[0038] Example 1

[0039] The powdered reagent dosing device for coal slurry wastewater treatment of the present invention includes a dosing mechanism 1, which includes a housing 101. The housing 101 contains three dosing units 102 connected in sequence. Each dosing unit 102 includes a tank 103. A scraper 1031 is installed on the inner bottom wall of the tank 103. The scraper 1031 includes a pair of scraping arms 1032 that are attached to the side wall of the tank 103. A cross arm 1033 is connected to the bottom of the pair of scraping arms 1032. A scraping motor 1034 is fixedly connected to the outer bottom of the tank 103. The output shaft of the scraping motor 1034 passes through the bottom wall of the tank 103 and is fixedly connected to the end face of the cross arm 1033 away from the scraping arm 1032.

[0040] When using the powdered reagent dosing device for coal slurry wastewater treatment according to Example 1, the specific steps of the powdered reagent dosing method of the present invention are as follows:

[0041] Step 1: Calculate the required dosage of powdered medicine and water according to the needs, and add the medicine and water to the container 103 of the dispensing unit 102 to make a medicine solution;

[0042] Step 2: Start the scraping motor 1034. The output end of the scraping motor 1034 drives the scraping plate 1031 to rotate. The scraping plate 1031 scrapes off the powdered medicine adhering to the side wall of the tank 103 of the dispensing unit 102 and dissolves it in the medicine solution.

[0043] By rotating the scraper 1031, some of the deposited powdered medicine and the powdered medicine adhering to the box wall can be stirred and melted, and added back to the medicine to be prepared. This ensures that the concentration of the prepared medicine is uniform. The uniform concentration of the medicine in the solution is crucial for accurate drug administration. Redissolving the medicine allows it to be fully dispersed in the solution, ensuring that an accurate dose is obtained each time it is used, thereby achieving the expected therapeutic effect and avoiding the impact of insufficient dosage on treatment or adverse reactions caused by excessive dosage.

[0044] Example 2

[0045] Based on Embodiment 1, the device of the present invention has a drug delivery mechanism 2 above the drug dispensing mechanism 1. The drug delivery mechanism 2 includes a fixed rod 201 located above the drug dispensing mechanism 1. The fixed rod 201 has a track along the axial direction. The track is slidably connected to a hanging scale 202. A sliding rod 203 is fixedly connected to one end of the hanging scale 202 away from the fixed rod 201. A drug addition box 204 is hinged to one end of the sliding rod 203 away from the hanging scale 202. A drug inlet is provided at the top of the drug addition box 204. The drug delivery mechanism 2 also includes a screw conveyor 205. A guide motor 2051 is installed at the bottom of the screw conveyor 205. A drug addition component 3 and an air blowing component 4 are arranged sequentially along the output direction of the guide motor 2051 on the screw conveyor 205. An output pipe 2052 is provided at one end of the screw conveyor 205 away from the guide motor 2051. The outlet of the output pipe 2052 is higher than the drug inlet of the drug addition box 204.

[0046] When using the powdered reagent dosing device for coal slurry wastewater treatment according to Example 2, the specific steps of the powdered reagent dosing method of the present invention are as follows:

[0047] Step 1: Calculate the required dosage of powdered medicine and water according to the needs. First, add water to the tank 103 of the dispensing unit 102. Then, start the dosing component 3 to make the powdered medicine fall off the wall of the storage bin 301 and onto the screw conveyor 205. After the medicine is dispensed, start the guide motor 2051. The guide motor 2051 drives the screw conveyor 205 to transport the powdered medicine through the output pipe 2052 to the dosing tank 204. Start the air blowing component 4 to blow air and clean the screw blades to ensure that the powdered medicine in the screw conveyor 205 enters the dosing tank 204.

[0048] Step 2: Weigh the powdered medicine in the dosing tank using a hanging scale. Once the required weight is reached, move the dosing tank 204 above the dispensing mechanism 1 via the slide bar 203. Tilt the dosing tank 204 to add the medicine into the tank 103 of the dispensing unit 102 to make a medicine solution.

[0049] Step 3: Start the scraping motor 1034. The output end of the scraping motor 1034 drives the scraping plate 1031 to rotate. The scraping plate 1031 scrapes off the powdered medicine adhering to the side wall of the tank 103 of the dispensing unit 102 and dissolves it in the medicine solution.

[0050] Weighing the reagents using the hanging scale 202 avoids direct contact between the reagents and the surface of the weighing equipment, reducing the possibility of contamination by external impurities and better ensuring their quality and purity. The screw conveyor 205, through precise control of the speed of the guide motor 44 and the design of the screw blades, can achieve precise control of the reagent feeding amount, meeting the precise requirements of different production processes for reagent addition. Furthermore, the screw conveyor 205 employs a sealed outer shell design, effectively preventing reagent leakage and dust dispersion.

[0051] Example 3

[0052] Based on Embodiment 2, the dosing assembly 3 of the present invention includes a drug storage chamber 301, a heating grid 302 and an oscillator 303 are installed on the side wall of the drug storage chamber 301, a level gauge 3011 is fixedly connected to the inner wall of the drug storage chamber 301, and a drug storage chamber regulating valve 3012 is installed at the output end of the drug storage chamber 301.

[0053] When using the powdered reagent dosing device for coal slurry wastewater treatment according to Example 3, the specific steps of the powdered reagent dosing method of the present invention are as follows:

[0054] Step 1: Calculate the required dosage of powdered medicine and water according to the needs. First, add water to the tank 103 of the dispensing unit 102. Then, open the regulating valve 3012 of the storage hopper and start the heating net 302. The heating net 302 removes the moisture from the medicine. Start the vibrator 303 to make the powdered medicine fall off the wall of the storage hopper 301 and onto the screw conveyor 205. After the medicine is dispensed, start the guide motor 2051. The guide motor 2051 drives the screw conveyor 205 to transport the powdered medicine through the output pipe 2052 to the dosing tank 204. Start the air blowing component 4 to blow air and clean the screw blades to ensure that the powdered medicine in the screw conveyor 205 enters the dosing tank 204.

[0055] Step 2: Weigh the powdered medicine in the dosing tank using a hanging scale. Once the required weight is reached, move the dosing tank 204 above the dispensing mechanism 1 via the slide bar 203. Tilt the dosing tank 204 to add the medicine into the tank 103 of the dispensing unit 102 to make a medicine solution.

[0056] Step 3: Start the scraping motor 1034. The output end of the scraping motor 1034 drives the scraping plate 1031 to rotate. The scraping plate 1031 scrapes off the powdered medicine adhering to the side wall of the tank 103 of the dispensing unit 102 and dissolves it in the medicine solution.

[0057] Heating the storage bin 301 via heating mesh 302 removes moisture from the medicine adhering to its walls. Then, oscillator 303 directs the medicine adhering to the bin walls into the screw conveyor 7. The combined action of heating mesh 302 and oscillator ensures uniform concentration of the prepared medicine, preventing insufficient dosage from affecting treatment or excessive dosage from causing adverse reactions. Level gauge 3011 monitors the medicine level in the storage bin, and storage bin regulating valve 3012 adjusts the amount of medicine entering the screw conveyor 205. Together, they precisely control the dosage, matching it to treatment needs, avoiding waste and ensuring treatment effectiveness. Secondly, they protect the equipment. Excessive medicine entry speed can cause significant pressure shocks to the dosing device, accelerating wear and even leading to malfunctions. Appropriately adjusting the medicine entry speed reduces these pressure shocks, extends equipment lifespan, and lowers maintenance costs.

[0058] Example 4

[0059] Based on Embodiment 3, a level gauge 1021 is fixedly connected to the side wall of the tank 103 of the present invention, a stirring motor 1022 is fixedly connected to the top of the tank 103, a stirrer 1023 is connected to the output end of the stirring motor 1022, the stirrer 1023 extends through the top wall of the tank 103 and into the interior of the tank 103, and a medicine discharge hole 1024 is provided at the bottom of the tank 103.

[0060] When using the powdered reagent dosing device for coal slurry wastewater treatment according to Example 4, the specific steps of the powdered reagent dosing method of the present invention are as follows:

[0061] Step 1: Calculate the required dosage of powdered medicine and water according to the needs. First, add water to the tank 103 of the dispensing unit 102. Then, open the regulating valve 3012 of the storage hopper and start the heating net 302. The heating net 302 removes the moisture from the medicine. Start the vibrator 303 to make the powdered medicine fall off the wall of the storage hopper 301 and onto the screw conveyor 205. After the medicine is dispensed, start the guide motor 2051. The guide motor 2051 drives the screw conveyor 205 to transport the powdered medicine through the output pipe 2052 to the dosing tank 204. Start the air blowing component 4 to blow air and clean the screw blades to ensure that the powdered medicine in the screw conveyor 205 enters the dosing tank 204.

[0062] Step 2: Weigh the powdered medicine in the dosing tank using a hanging scale. Once the required weight is reached, move the dosing tank 204 above the dispensing mechanism 1 via the slide bar 203. Tilt the dosing tank 204 and add the medicine to the dispensing unit 102 to prepare the medicine solution. After adding water, start the stirring motor 1022 and stir the medicine solution using the stirrer 1023 connected to the stirring motor 1022.

[0063] Step 3: Start the scraping motor 1034. The output end of the scraping motor 1034 drives the scraping plate 1031 to rotate. The scraping plate 1031 scrapes off the powdered medicine adhering to the side wall of the tank 103 of the dispensing unit 102 and dissolves it in the medicine solution.

[0064] By providing a discharge port 1024, impurities in the dosing mechanism can be removed, preventing their accumulation and potential blockage. A level gauge 1021 allows for monitoring of the liquid level. A stirrer 1023 agitates the reagent, ensuring thorough contact and rapid mixing between the reagent and solvent. For poorly soluble reagents, stirring breaks down the liquid film on the surface of the reagent particles, allowing the solvent to penetrate more easily, accelerating dissolution, improving efficiency, and enabling the reagent to reach a uniformly dissolved state more quickly. Furthermore, when adding multiple reagents or other substances to the solution, the stirrer 1023 ensures thorough mixing of different components, preventing stratification or uneven concentrations. This helps ensure the accuracy and stability of dosing, allowing the reagent to function consistently in subsequent treatment processes and guaranteeing consistent treatment results.

[0065] Example 5

[0066] Based on Embodiment 4, a concentration meter 1027 is installed inside the tank body 103 of the present invention. A feed hopper 1025 is provided at the top of the tank body 103. A receiving box 1026 with an opening facing the feed hopper 1025 is fixedly connected to the side wall of the feed hopper 1025. A drive motor is fixedly connected to the side of the receiving box 1026 away from the feed hopper 1025. A spraying device 104 is installed inside the feed hopper 1025. The spraying device 104 includes a water pump. The water pump input is connected to an external water source, and the water pump output is connected to a spraying pipe 1041. The other end of the spraying pipe 1041... One end is connected to the nozzle 1042. The spray pipe 1041 is equipped with a first regulating valve 1043 and a first flow meter 1044. The nozzle 1042 has a drain hole 1045 that is coaxial with the opening of the feed hopper 1025. The side wall of the feed hopper 1025 that connects to the receiving box 1026 has a connecting port. The shape of the connecting port matches the shape of the nozzle 1042. The nozzle 1042 is equipped with a lead screw. One end of the lead screw is connected to the drive motor in the receiving box 1026. The nozzle panel of the nozzle 1042 is located on the side away from the tank 103.

[0067] When using the powdered reagent dosing device for coal slurry wastewater treatment according to Example 5, the specific steps of the powdered reagent dosing method of the present invention are as follows:

[0068] Step 1: Calculate the required dosage of powdered medicine and water according to the needs. First, add water to the tank 103 of the dispensing unit 102. Then, open the regulating valve 3012 of the storage hopper and start the heating net 302. The heating net 302 removes the moisture from the medicine. Start the vibrator 303 to make the powdered medicine fall off the wall of the storage hopper 301 and onto the screw conveyor 205. After the medicine is dispensed, start the guide motor 2051. The guide motor 2051 drives the screw conveyor 205 to transport the powdered medicine through the output pipe 2052 to the dosing tank 204. Start the air blowing component 4 to blow air and clean the screw blades to ensure that the powdered medicine in the screw conveyor 205 enters the dosing tank 204.

[0069] Step 2: Weigh the powdered medicine in the dosing tank using a hanging scale. Once the required weight is reached, move the dosing tank 204 above the dispensing mechanism 1 via the slide bar 203. Tilt the dosing tank 204 and add the medicine to the dispensing unit 102 to prepare the medicine solution. After adding water, start the stirring motor 1022 and stir the medicine solution using the stirrer 1023 connected to the stirring motor 1022.

[0070] Step 3: Rotate the drive motor of the dispensing unit 102 in the forward direction to move the nozzle 1042 from the container 1026 of the dispensing unit 102 to the feed hopper 1025 of the dispensing unit 102. Open the first regulating valve 1043 of the dispensing unit and use the nozzle 1042 of the first dispensing unit 105 to rinse the hopper wall of the feed hopper 1025 of the first dispensing unit 105. The rinsed medicine solution enters the tank 103 of the first dispensing unit 105 through the drain hole 1045 of the first dispensing unit 105. After rinsing, turn off the stirring motor 1022 of the first dispensing unit 105 to stop stirring. Reverse the drive motor of the dispensing unit 102 to move the nozzle 1042 into the container 1026.

[0071] Step 4: Start the scraping motor 1034. The output end of the scraping motor 1034 drives the scraping plate 1031 to rotate. The scraping plate 1031 scrapes off the powdered medicine adhering to the side wall of the tank 103 of the dispensing unit 102 and dissolves it in the medicine solution.

[0072] On the one hand, when preparing the drug solution, the residual powdered drug on the feed hopper 1025 can be dissolved by the spray device 104, and the dissolved drug solution can be discharged into the dosing unit 102. This can make the prepared drug concentration as accurate as possible, and the continued use of the residual drug on the feed hopper 1025 can also reduce drug loss. On the other hand, the spray device can clean the feed hopper 1025. Drug residues and dirt in the feed hopper 1025 may react with newly added drugs, causing the drugs to deteriorate or become ineffective. The spray device 104 can keep the feed hopper 1025 clean, prevent impurities and contaminants from mixing into the drugs, ensure the quality and performance of the drugs, and thus improve the dosing effect.

[0073] Example 6

[0074] Based on Embodiment 5, the drug dispensing units 102 are respectively a first drug dispensing unit 105, a second drug dispensing unit 106, and a third drug dispensing unit 107 along the connection direction. A water distribution pipe 1051 is provided through the top wall of the tank 103 of the first drug dispensing unit 105. The end of the water distribution pipe 1051 away from the tank 103 of the first drug dispensing unit 105 is connected to the spray pipe 1041. A second regulating valve 1052 and a second flow meter 1053 are installed on the water distribution pipe 1051.

[0075] When using the powdered reagent dosing device for coal slurry wastewater treatment according to Example 6, the specific steps of the powdered reagent dosing method of the present invention are as follows:

[0076] Step 1: Calculate the required dosage of powdered medicine and water volume according to the needs. First, open the second regulating valve 1052 to allow water to enter the tank 103 of the first dispensing unit 105. Monitor the water volume through the level gauge 1021 of the first dispensing unit. When the required amount is reached, close the second regulating valve 1052 to stop the water intake. Then, open the regulating valve 3012 of the storage bin and start the heating net 302 to remove moisture from the medicine. Start the vibrator 303 to make the powdered medicine detach from the wall of the storage bin 301 and fall onto the screw conveyor 205. After the medicine is dispensed, start the guide motor 2051. The guide motor 2051 drives the screw conveyor 205 to transport the powdered medicine through the output pipe 2052 to the dosing tank 204. Start the air blowing component 4 to blow air and clean the screw blades to ensure that the powdered medicine in the screw conveyor 205 enters the dosing tank 204.

[0077] Step 2: Monitor the amount of medicine in the dosing tank 204 using the hanging scale 202. When the required amount of medicine is reached, control the slide bar 203 to move above the feed hopper 1025 of the first dosing unit 105, causing the dosing tank 204 to tilt. The powdered medicine is poured into the feed hopper 1025 of the first dosing unit 105 through the outlet, and then enters the tank 103 of the first dosing unit 105. At this time, turn on the stirring motor 1022 of the first dosing unit 105, and stir the medicine solution through the stirrer 1023 connected to the stirring motor 1022 of the first dosing unit 105.

[0078] Step 3: After the powdered medicine is added, rotate the drive motor of the first medicine preparation unit 105 in the forward direction to move the nozzle 1042 from the container 1026 of the first medicine preparation unit 105 to the feed hopper 1025 of the first medicine preparation unit 105. Open the first regulating valve 1043 of the first medicine preparation unit 105. The required water is used to rinse the hopper wall of the feed hopper 1025 of the first medicine preparation unit 105 through the nozzle 1042. The rinsed medicine solution enters the tank 103 of the first medicine preparation unit 105 through the drain hole 1045. After rinsing, turn off the stirring motor 1022 of the first medicine preparation unit 105 to stop stirring. Reverse the drive motor of the medicine preparation unit 102 to move the nozzle 1042 into the container 1026.

[0079] Step 4: After stirring is completed, monitor the concentration of the medicine in tank 103 of the first preparation unit 105. If the concentration meets the requirements, the medicine solution in tank 103 of the first preparation unit 105 enters tank 103 of the second preparation unit 106, and then enters tank 103 of the third preparation unit 107 from tank 103 of the second preparation unit 106 for storage. If the concentration of the powdered drug solution is lower than the required value, the scraping motor 1034 of the first drug preparation unit 105 is turned on. The scraping motor 1034 drives the scraper 1031 to rotate, scraping away and dissolving the drug adhering to the tank 103 of the first drug preparation unit 105 and the undissolved drug deposited at the bottom of the tank. After complete dissolution, the concentration of the powdered drug solution in the tank 103 of the first drug preparation unit 105 is monitored again. If the concentration meets the requirements, the drug solution in the tank 103 of the first drug preparation unit 105 directly enters the tank 103 of the second drug preparation unit 106, and then enters the tank 103 of the third drug preparation unit 107 for storage. If the concentration does not meet the requirements, the drug solution in the tank 103 of the first drug preparation unit 105 flows into the tank 103 of the second drug preparation unit 106 and stays there for replenishment.

[0080] Step 5: If the concentration does not meet the requirements, calculate the required amount of additional medicine and the amount of water needed to clean the feed hopper 1025 based on the monitoring results. Open the regulating valve 3012 of the medicine storage bin. The medicine in the medicine storage bin 301 falls into the screw conveyor 205 under gravity. Start the heating net 302 to remove moisture from the medicine by heating. Start the vibrator 303 to make the powdered medicine detach from the wall of the medicine storage bin 301 and fall into the screw conveyor 205. After the medicine is added, start the guide motor 2051 to drive the screw conveyor. 205. The powdered medicine is conveyed to the dosing tank 204 through the output pipe 2052. The air blowing assembly 4 is activated to blow air and clean the spiral blades to ensure smooth delivery of the powdered medicine. The amount of medicine in the dosing tank 204 is monitored by the hanging scale 202. When the amount of medicine reaches the required level, the control slide 203 is moved above the feed hopper 1025 of the second dosing unit 106, causing the dosing tank 204 to tilt. The medicine is poured into the feed hopper 1025 of the second dosing unit 106 through the inlet, and then enters the tank 103 of the second dosing unit 106. At this time, the stirring motor 1022 of the second dosing unit 106 is turned on, and the agitator 1023 connected to the stirring motor 1022 of the second dosing unit 106 is used to stir the medicine solution.

[0081] Step Six: After completing the replenishment of powdered medicine, rotate the drive motor of the second preparation unit 106 forward to move the nozzle 1042 from the container 1026 of the second preparation unit 106 to the feed hopper 1025 of the second preparation unit 106. Open the first regulating valve 1043 of the second preparation unit 106 to deliver water to the nozzle 1042 of the second preparation unit 106 to rinse the hopper wall of the feed hopper 1025 of the second preparation unit 106. The rinsed medicine solution enters the tank 103 of the second preparation unit 106 through the drain hole 1045 of the second preparation unit 106. After rinsing, turn off the stirring motor 1022 of the second preparation unit 106 to stop stirring, and rotate the drive motor of the preparation unit 102 in reverse to move the nozzle 1042 into the container 1026.

[0082] Step 7: Monitor the concentration of the drug solution in the second drug preparation unit 106. If the concentration of the drug solution is still lower than the required value, start the scraping motor 1034 of the second drug preparation unit 106 to drive the scraping plate 1031 of the second drug preparation unit 106 to rotate, scraping and dissolving the drug adhering to the tank 103 of the second drug preparation unit 106 and the undissolved drug deposited at the bottom of the tank. After scraping and dissolving, monitor the concentration of the drug solution in the tank 103 of the second drug preparation unit 106 until the concentration meets the requirements. The drug solution is then transferred from the tank 103 of the second drug preparation unit 106 to the tank 103 of the third drug preparation unit 107 for storage.

[0083] The insoluble parts and impurities in the added powdered medicine are discharged from the discharge port 1024 of the dispensing unit 102 tank 103.

[0084] The water distribution pipeline, through valves and flow meters, allows for precise regulation of water velocity and flow rate, ensuring accurate chemical concentration. Furthermore, it can be flexibly adjusted according to different treatment conditions and requirements. When the treated water volume changes or the chemical concentration needs adjustment, the system can quickly adapt to changes in conditions by adjusting valves on the distribution pipeline or changing the operating parameters of the water pump, ensuring the dosing system is always in optimal operating condition. The distribution pipeline also enables two-stage dosing, allowing for more precise control of reagent dosage. When the primary dosing concentration is insufficient, the secondary dosing can fine-tune the dosage based on the primary concentration, precisely adjusting the amount of reagent added to better meet the strict requirements of the process and ensure stable treatment results. Moreover, compared to a single-stage dosing system, two-stage dosing allows for more rational control of reagent dosage. Because precise adjustment is possible, waste caused by overdosing is avoided, effectively reducing reagent usage while ensuring treatment effectiveness, thereby lowering operating costs.

[0085] Example 7

[0086] Based on Embodiment Six, a dispensing pipe 1071 is provided at the bottom of the tank 103 of the third dispensing unit 107, and a mesh 1072 is fixedly connected to one end of the inner wall of the dispensing pipe 1071 near the tank 103 of the third dispensing unit 107.

[0087] When using the powdered reagent dosing device for coal slurry wastewater treatment according to Example 7, the specific steps of the powdered reagent dosing method of the present invention are as follows:

[0088] Step 1: Calculate the required dosage of powdered medicine and water volume according to the needs. First, open the second regulating valve 1052 to allow water to enter the tank 103 of the first dispensing unit 105. Monitor the water volume through the level gauge 1021 of the first dispensing unit. When the required amount is reached, close the second regulating valve 1052 to stop the water intake. Then, open the regulating valve 3012 of the storage bin and start the heating net 302 to remove moisture from the medicine. Start the vibrator 303 to make the powdered medicine detach from the wall of the storage bin 301 and fall onto the screw conveyor 205. After the medicine is dispensed, start the guide motor 2051. The guide motor 2051 drives the screw conveyor 205 to transport the powdered medicine through the output pipe 2052 to the dosing tank 204. Start the air blowing component 4 to blow air and clean the screw blades to ensure that the powdered medicine in the screw conveyor 205 enters the dosing tank 204.

[0089] Step 2: Monitor the amount of medicine in the dosing tank 204 using the hanging scale 202. When the required amount of medicine is reached, control the slide bar 203 to move above the feed hopper 1025 of the first dosing unit 105, causing the dosing tank 204 to tilt. The powdered medicine is poured into the feed hopper 1025 of the first dosing unit 105 through the outlet, and then enters the tank 103 of the first dosing unit 105. At this time, turn on the stirring motor 1022 of the first dosing unit 105, and stir the medicine solution through the stirrer 1023 connected to the stirring motor 1022 of the first dosing unit 105.

[0090] Step 3: After the powdered medicine is added, rotate the drive motor of the first medicine preparation unit 105 in the forward direction to move the nozzle 1042 from the container 1026 of the first medicine preparation unit 105 to the feed hopper 1025 of the first medicine preparation unit 105. Open the first regulating valve 1043 of the first medicine preparation unit 105. The required water is used to rinse the hopper wall of the feed hopper 1025 of the first medicine preparation unit 105 through the nozzle 1042. The rinsed medicine solution enters the tank 103 of the first medicine preparation unit 105 through the drain hole 1045. After rinsing, turn off the stirring motor 1022 of the first medicine preparation unit 105 to stop stirring. Reverse the drive motor of the medicine preparation unit 102 to move the nozzle 1042 into the container 1026.

[0091] Step 4: After stirring is completed, monitor the concentration of the medicine in tank 103 of the first preparation unit 105. If the concentration meets the requirements, the medicine solution in tank 103 of the first preparation unit 105 enters tank 103 of the second preparation unit 106, and then enters tank 103 of the third preparation unit 107 from tank 103 of the second preparation unit 106 for storage. If the concentration of the powdered drug solution is lower than the required value, the scraping motor 1034 of the first drug preparation unit 105 is turned on. The scraping motor 1034 drives the scraper 1031 to rotate, scraping away and dissolving the drug adhering to the tank 103 of the first drug preparation unit 105 and the undissolved drug deposited at the bottom of the tank. After complete dissolution, the concentration of the powdered drug solution in the tank 103 of the first drug preparation unit 105 is monitored again. If the concentration meets the requirements, the drug solution in the tank 103 of the first drug preparation unit 105 directly enters the tank 103 of the second drug preparation unit 106, and then enters the tank 103 of the third drug preparation unit 107 for storage. If the concentration does not meet the requirements, the drug solution in the tank 103 of the first drug preparation unit 105 flows into the tank 103 of the second drug preparation unit 106 and stays there for replenishment.

[0092] Step 5: If the concentration does not meet the requirements, calculate the required amount of additional medicine and the amount of water needed to clean the feed hopper 1025 based on the monitoring results. Open the regulating valve 3012 of the medicine storage bin. The medicine in the medicine storage bin 301 falls into the screw conveyor 205 under gravity. Start the heating net 302 to remove moisture from the medicine by heating. Start the vibrator 303 to make the powdered medicine detach from the wall of the medicine storage bin 301 and fall into the screw conveyor 205. After the medicine is added, start the guide motor 2051 to drive the screw conveyor. 205. The powdered medicine is conveyed to the dosing tank 204 through the output pipe 2052. The air blowing assembly 4 is activated to blow air and clean the spiral blades to ensure smooth delivery of the powdered medicine. The amount of medicine in the dosing tank 204 is monitored by the hanging scale 202. When the amount of medicine reaches the required level, the control slide 203 is moved above the feed hopper 1025 of the second dosing unit 106, causing the dosing tank 204 to tilt. The medicine is poured into the feed hopper 1025 of the second dosing unit 106 through the inlet, and then enters the tank 103 of the second dosing unit 106. At this time, the stirring motor 1022 of the second dosing unit 106 is turned on, and the agitator 1023 connected to the stirring motor 1022 of the second dosing unit 106 is used to stir the medicine solution.

[0093] Step Six: After completing the replenishment of powdered medicine, rotate the drive motor of the second preparation unit 106 forward to move the nozzle 1042 from the container 1026 of the second preparation unit 106 to the feed hopper 1025 of the second preparation unit 106. Open the first regulating valve 1043 of the second preparation unit 106 to deliver water to the nozzle 1042 of the second preparation unit 106 to rinse the hopper wall of the feed hopper 1025 of the second preparation unit 106. The rinsed medicine solution enters the tank 103 of the second preparation unit 106 through the drain hole 1045 of the second preparation unit 106. After rinsing, turn off the stirring motor 1022 of the second preparation unit 106 to stop stirring, and rotate the drive motor of the preparation unit 102 in reverse to move the nozzle 1042 into the container 1026.

[0094] Step 7: Monitor the concentration of the drug solution in the second drug preparation unit 106. If the concentration of the drug solution is still lower than the required value, start the scraping motor 1034 of the second drug preparation unit 106 to drive the scraping plate 1031 of the second drug preparation unit 106 to rotate, scraping and dissolving the drug adhering to the tank 103 of the second drug preparation unit 106 and the undissolved drug deposited at the bottom of the tank. After scraping and dissolving, monitor the concentration of the drug solution in the tank 103 of the second drug preparation unit 106 until the concentration meets the requirements. The drug solution is then transferred from the tank 103 of the second drug preparation unit 106 to the tank 103 of the third drug preparation unit 107 for storage.

[0095] The insoluble parts and impurities in the added powdered medicine are discharged from the discharge port 1024 of the dispensing unit 102 tank 103.

[0096] The mesh screen 1072 filters impurities from the storage tank 28, preventing them from entering the prepared pharmaceutical solution. The presence of impurities reduces the purity of the solution, affecting its performance and efficacy. Filtering impurities ensures the solution participates in the reaction or exerts its effect with higher purity, thereby improving the dosing treatment effect. On the other hand, solid impurities can cause wear, blockage, or corrosion to the equipment. Filtering impurities reduces the frequency of these equipment failures, extends the equipment's service life, and lowers maintenance and replacement costs.

[0097] Example 8

[0098] Based on Embodiment 7, the air blowing assembly 4 includes an air blowing pump 401, the output end of which is connected to the pipe wall of the screw conveyor 205, and the input end of which is connected to an air storage tank 402.

[0099] When using the powdered reagent dosing device for coal slurry wastewater treatment according to Example 7, the specific steps of the powdered reagent dosing method of the present invention are as follows:

[0100] Step 1: Calculate the required dosage of powdered medicine and water volume according to the needs. First, open the second regulating valve 1052 to allow water to enter the tank 103 of the first dispensing unit 105. Monitor the water volume through the level gauge 1021 of the first dispensing unit. When the required amount is reached, close the second regulating valve 1052 to stop the water intake. Then, open the regulating valve 3012 of the storage bin and start the heating net 302 to remove moisture from the medicine. Start the vibrator 303 to make the powdered medicine detach from the wall of the storage bin 301 and fall onto the screw conveyor 205. After the medicine is dispensed, start the guide motor 2051. The guide motor 2051 drives the screw conveyor 205 to transport the powdered medicine through the output pipe 2052 to the dosing tank 204. Start the air pump 401 to transport the gas in the air storage tank 402 to the screw conveyor 205 to blow air and clean the screw blades, ensuring that the powdered medicine in the screw conveyor 205 enters the dosing tank 204.

[0101] Step 2: Monitor the amount of medicine in the dosing tank 204 using the hanging scale 202. When the required amount of medicine is reached, control the slide bar 203 to move above the feed hopper 1025 of the first dosing unit 105, causing the dosing tank 204 to tilt. The powdered medicine is poured into the feed hopper 1025 of the first dosing unit 105 through the outlet, and then enters the tank 103 of the first dosing unit 105. At this time, turn on the stirring motor 1022 of the first dosing unit 105, and stir the medicine solution through the stirrer 1023 connected to the stirring motor 1022 of the first dosing unit 105.

[0102] Step 3: After the powdered medicine is added, rotate the drive motor of the first medicine preparation unit 105 in the forward direction to move the nozzle 1042 from the container 1026 of the first medicine preparation unit 105 to the feed hopper 1025 of the first medicine preparation unit 105. Open the first regulating valve 1043 of the first medicine preparation unit 105. The required water is used to rinse the hopper wall of the feed hopper 1025 of the first medicine preparation unit 105 through the nozzle 1042. The rinsed medicine solution enters the tank 103 of the first medicine preparation unit 105 through the drain hole 1045. After rinsing, turn off the stirring motor 1022 of the first medicine preparation unit 105 to stop stirring. Reverse the drive motor of the medicine preparation unit 102 to move the nozzle 1042 into the container 1026.

[0103] Step 4: After stirring is completed, monitor the concentration of the medicine in tank 103 of the first preparation unit 105. If the concentration meets the requirements, the medicine solution in tank 103 of the first preparation unit 105 enters tank 103 of the second preparation unit 106, and then enters tank 103 of the third preparation unit 107 from tank 103 of the second preparation unit 106 for storage. If the concentration of the powdered drug solution is lower than the required value, the scraping motor 1034 of the first drug preparation unit 105 is turned on. The scraping motor 1034 drives the scraper 1031 to rotate, scraping away and dissolving the drug adhering to the tank 103 of the first drug preparation unit 105 and the undissolved drug deposited at the bottom of the tank. After complete dissolution, the concentration of the powdered drug solution in the tank 103 of the first drug preparation unit 105 is monitored again. If the concentration meets the requirements, the drug solution in the tank 103 of the first drug preparation unit 105 directly enters the tank 103 of the second drug preparation unit 106, and then enters the tank 103 of the third drug preparation unit 107 for storage. If the concentration does not meet the requirements, the drug solution in the tank 103 of the first drug preparation unit 105 flows into the tank 103 of the second drug preparation unit 106 and stays there for replenishment.

[0104] Step 5: If the concentration does not meet the requirements, calculate the required amount of additional medicine and the amount of water needed to clean the feed hopper 1025 based on the monitoring results. Open the regulating valve 3012 of the medicine storage bin. The medicine in the medicine storage bin 301 falls into the screw conveyor 205 under gravity. Start the heating net 302 to remove moisture from the medicine by heating. Start the vibrator 303 to make the powdered medicine detach from the wall of the medicine storage bin 301 and fall into the screw conveyor 205. After the medicine is added, start the guide motor 2051. The guide motor 2051 drives the screw conveyor 205 to pass the powdered medicine through the output pipe. The powdered agent is conveyed to the dosing tank 204 via a pump 401. The pump 401 then delivers the gas from the storage tank 402 to the screw conveyor 205, cleaning the screw blades to ensure smooth transport of the powdered agent. The amount of agent in the dosing tank 204 is monitored by a crane scale 202. When the required amount is reached, the control lever 203 moves above the feed hopper 1025 of the second dosing unit 106, tilting the dosing tank 204. The agent is then poured into the feed hopper 1025 of the second dosing unit 106 through the inlet, and then into the tank 103 of the second dosing unit 106. At this time, the stirring motor 1022 of the second dosing unit 106 is turned on, and the agitator 1023 connected to the stirring motor 1022 stirs the agent solution.

[0105] Step Six: After completing the replenishment of powdered medicine, rotate the drive motor of the second preparation unit 106 forward to move the nozzle 1042 from the container 1026 of the second preparation unit 106 to the feed hopper 1025 of the second preparation unit 106. Open the first regulating valve 1043 of the second preparation unit 106 to deliver water to the nozzle 1042 of the second preparation unit 106 to rinse the hopper wall of the feed hopper 1025 of the second preparation unit 106. The rinsed medicine solution enters the tank 103 of the second preparation unit 106 through the drain hole 1045 of the second preparation unit 106. After rinsing, turn off the stirring motor 1022 of the second preparation unit 106 to stop stirring, and rotate the drive motor of the preparation unit 102 in reverse to move the nozzle 1042 into the container 1026.

[0106] Step 7: Monitor the concentration of the drug solution in the second drug preparation unit 106. If the concentration of the drug solution is still lower than the required value, start the scraping motor 1034 of the second drug preparation unit 106 to drive the scraping plate 1031 of the second drug preparation unit 106 to rotate, scraping and dissolving the drug adhering to the tank 103 of the second drug preparation unit 106 and the undissolved drug deposited at the bottom of the tank. After scraping and dissolving, monitor the concentration of the drug solution in the tank 103 of the second drug preparation unit 106 until the concentration meets the requirements. The drug solution is then transferred from the tank 103 of the second drug preparation unit 106 to the tank 103 of the third drug preparation unit 107 for storage.

[0107] The insoluble parts and impurities in the added powdered medicine are discharged from the discharge port 1024 of the dispensing unit 102 tank 103.

[0108] To prevent powdered medicine from adhering inside the screw conveyor 205, an air blowing assembly 4 is installed on the pipe wall of the screw conveyor 205. The air blowing assembly blows out the gas in the air storage tank 402 at high pressure through the air blowing pump 401. Through the cooperation of the air storage tank 402 and the air blowing pump 401, the powdered medicine in the screw conveyor 7 is blown into the dosing tank. It can reach into every corner and gap of the screw conveyor, clean the powdered medicine as thoroughly as possible, reduce medicine residue, and further ensure that the concentration of the prepared medicine is uniform, avoiding the impact of insufficient dosage on treatment or adverse reactions caused by excessive dosage.

Claims

1. A powdered reagent dosing device for treating coal slurry wastewater, characterized in that, The device includes a dispensing mechanism (1), which includes a housing (101). The housing (101) contains three dispensing units (102) connected in sequence. Each dispensing unit (102) includes a tank (103). A scraper (1031) is installed on the inner bottom wall of the tank (103). The scraper (1031) includes a pair of scraping arms (1032) that fit against the side wall of the tank (103). A cross arm (1033) is connected to the bottom of the pair of scraping arms (1032). A scraping motor (1034) is fixedly connected to the bottom of the outer side of the tank (103). The output shaft of the scraping motor (1034) passes through the bottom wall of the tank (103) and is fixedly connected to the bottom surface of the cross arm (1033). Above the dispensing mechanism (1) is a delivery mechanism (2). The delivery mechanism (2) includes a fixed rod (201) located above the dispensing mechanism (1). The fixed rod (201) has a track along its axial direction. A hanging scale (202) is slidably connected to the track. A sliding rod (203) is fixedly connected to one end of the hanging scale (202) away from the fixed rod (201). A dosing tank (204) is hinged to one end of the sliding rod (203) away from the hanging scale (202). The top of the dosing tank (204) is provided with an inlet. The drug delivery mechanism (2) also includes a screw conveyor (205), a guide motor (2051) is installed at the bottom of the screw conveyor (205), and a dosing component (3) and an air blowing component (4) are arranged sequentially along the output direction of the guide motor (2051) on the screw conveyor (205). An output pipe (2052) is provided at the end of the screw conveyor (205) away from the guide motor (2051), and the outlet of the output pipe (2052) is higher than the drug inlet of the dosing box (204). The dosing assembly (3) includes a drug storage chamber (301), a heating grid (302) and an oscillator (303) are installed on the side wall of the drug storage chamber (301), a level gauge (3011) is fixedly connected to the inner wall of the drug storage chamber (301), and a drug storage chamber regulating valve (3012) is installed at the output end of the drug storage chamber (301). A level gauge (1021) is fixedly connected to the side wall of the tank (103), and a stirring motor (1022) is fixedly connected to the top of the tank (103). The output end of the stirring motor (1022) is connected to a stirrer (1023). The stirrer (1023) extends through the top wall of the tank (103) into the interior of the tank (103). A discharge hole (1024) is provided at the bottom of the tank (103). The tank body (103) is provided with a feeding hopper (1025) at the top. A receiving box (1026) with an opening facing the feeding hopper (1025) is fixedly connected to the side wall of the feeding hopper (1025). A drive motor is fixedly connected to the side of the receiving box (1026) away from the feeding hopper (1025). A spraying device (104) is installed inside the feeding hopper (1025). The spraying device (104) includes a water pump. The water pump input end is connected to an external water source, and the water pump output end is connected to a spraying pipe (1041). The other end of the spraying pipe (1041) is connected to a nozzle (1042) through a hose. A first regulating valve (1043) and a first flow meter (1044) are installed on the spray pipe (1041). A drain hole (1045) coaxial with the opening of the feed hopper (1025) is opened on the nozzle (1042). A connecting port is opened on the side wall of the feed hopper (1025) connected to the receiving box (1026). The shape of the connecting port matches the shape of the nozzle (1042). A lead screw is passed through the nozzle (1042). One end of the lead screw is connected to the drive motor in the receiving box (1026). The nozzle panel of the nozzle (1042) is located on the side away from the tank (103). The air blowing assembly (4) includes an air blowing pump (401), the output end of which is connected to the pipe wall of the screw conveyor (205), and the input end of which is connected to an air storage tank (402).

2. The powdered reagent dosing device for coal slurry wastewater treatment according to claim 1, characterized in that, The dosing units (102) are respectively a first dosing unit (105), a second dosing unit (106), and a third dosing unit (107) along the connection direction. A water distribution pipe (1051) is provided through the top wall of the tank (103) of the first dosing unit (105). The end of the water distribution pipe (1051) away from the tank (103) of the first dosing unit (105) is connected to the spray pipe (1041). A second regulating valve (1052) and a second flow meter (1053) are installed on the water distribution pipe (1051).

3. The powdered reagent dosing device for coal slurry wastewater treatment according to claim 2, characterized in that, The bottom of the tank (103) of the third drug preparation unit (107) is provided with a drug outlet pipe (1071), and a mesh grid (1072) is fixedly connected to one end of the inner wall of the drug outlet pipe (1071) near the tank (103) of the third drug preparation unit (107).

4. A method for adding powdered medicine, characterized in that, The specific steps of using the powdered reagent dosing device for coal slurry wastewater treatment according to any one of claims 1-3 are as follows: Step 1: Calculate the required amount of powdered medicine and water according to the needs, and add the medicine and water into the tank (103) of the dispensing unit (102) to make a medicine solution; Step 2: Start the scraping motor (1034). The output end of the scraping motor (1034) drives the scraping plate (1031) to rotate. The scraping plate (1031) scrapes off the powdered medicine adhering to the side wall of the tank (103) of the dispensing unit (102) and dissolves it in the medicine solution.

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