A multi-stage wastewater treatment device and a wastewater treatment method for washing medicinal herbs.

Abstract

This invention relates to the field of wastewater treatment technology, specifically to a multi-stage wastewater treatment device and a wastewater treatment method for cleaning medicinal herbs. The device includes a wastewater treatment tank body, internally divided by partitions into a first pretreatment chamber, a second pretreatment chamber, a third pretreatment chamber, and a final treatment chamber. The first pretreatment chamber is equipped with a floating debris collection assembly for collecting floating matter in the wastewater. The floating debris collection assembly includes a support frame, which is fixedly installed in the first pretreatment chamber. A rotating shaft is vertically rotatably mounted at the center of the support frame. This invention, by adding a rotating shaft to the device, drives the frame to rotate, collecting floating matter from the water surface through a filter screen within the frame. When the filter screen is full, it can be removed and replaced. This solves the problem of excessive floating matter clogging pipes and the internal filtration structure, and also eliminates the need for frequent cleaning of the internal floating matter by operators.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a multi-stage wastewater treatment device and a wastewater treatment method for cleaning medicinal materials. Background Technology

[0002] Traditional Chinese medicinal herbs often require washing during harvesting and processing to remove surface mud, impurities, and pesticide residues. However, this washing process generates a large amount of wastewater. Direct discharge of this wastewater without treatment will cause serious environmental pollution. Wastewater treatment methods for washing medicinal herbs mainly include physical, chemical, and biological methods. In cases where medicinal herb residues or debris float on the surface, excessive accumulation of these particles can clog pipes and other filtration systems, requiring frequent, time-consuming, and labor-intensive cleaning by workers, which is also inefficient. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-stage wastewater treatment device and a wastewater treatment method for cleaning medicinal materials. By adding a rotating shaft to the device, the rotating shaft drives the frame to rotate, and the filter screen in the frame collects floating objects on the water surface. When the floating objects are full, the filter screen can be removed and replaced. This solves the problem of excessive floating objects in the device clogging the pipes and internal filtration structure. Moreover, this method eliminates the need for workers to frequently clean the floating objects inside.

[0004] To address the problems of existing technologies, this invention provides a multi-stage wastewater treatment device and a wastewater treatment method for cleaning medicinal materials. The device includes a wastewater treatment tank body, internally divided into a first pretreatment chamber, a second pretreatment chamber, a third pretreatment chamber, and a final treatment chamber via partitions. The first pretreatment chamber is equipped with a floating debris collection assembly for collecting floating debris from the wastewater. The floating debris collection assembly includes a support frame, which is fixedly installed in the first pretreatment chamber. A rotating shaft is vertically rotatably mounted at the center of the support frame. The floating debris collection assembly also includes a first rotation drive and a frame. The first rotation drive is fixed to the center of the top of the support frame, and its output end passes through the support frame and connects to the output end of the rotating shaft to drive its rotation. The frame is fixed to the outside of the rotating shaft, and several sets of clips are distributed on the frame. Filter screens for collecting floating debris are hung outside the clips.

[0005] Preferably, the second pretreatment chamber is provided with an adsorption assembly for adsorbing impurities in wastewater. The adsorption assembly includes an electrode plate and a guide rod. The guide rod is fixed laterally inside the second pretreatment chamber and is used to support the electrode plate. The electrode plate slides on the guide rod. The electrode plate is composed of several metal sheets stacked on top of each other. Two electrode plates are symmetrically arranged on the guide rod.

[0006] Preferably, the adsorption assembly further includes a vibration motor and a reset spring. The reset spring is sleeved on the guide rod to reset the electrode plate. One end of the reset spring is connected to one of the electrode plates, and the other end of the reset spring is connected to the other electrode plate. The vibration motor is fixedly mounted on the electrode plate and is used to make the electrode plate vibrate.

[0007] Preferably, a limiting frame is installed inside the third pretreatment chamber, and a reagent box for storing disinfectant is placed on the limiting frame. The bottom of the reagent box is also connected to a pipe with a solenoid valve for discharging disinfectant.

[0008] Preferably, a sleeve is installed on the partition between the third pretreatment chamber and the second pretreatment chamber, and a filter element for filtration is inserted in the sleeve. Several buckles for easy removal of the filter element are distributed around the outside of the sleeve, and one end of the buckle is engaged with the filter element.

[0009] Preferably, a cleaning component is also provided near the bottom of the third pretreatment chamber, and the cleaning component includes a limiting plate. The limiting plate is symmetrically installed on the partition between the third pretreatment chamber and the final treatment box, and a grid plate for filtering impurities is slidably provided in the limiting plate.

[0010] Preferably, the cleaning assembly further includes a scraper, a second rotary drive, and a pulley. The second rotary drive is fixed to the partition between the third pretreatment chamber and the final treatment chamber by a connecting block. The output end of the second rotary drive is connected to the pulley and used to drive the pulley to rotate. A belt for the scraper to reciprocate up and down is sleeved between the pulleys. One side of the scraper is in contact with the outside of the grid plate and is used to clean impurities on the grid plate. Both ends of the scraper are fixed to one strand of the belt.

[0011] Preferably, a plurality of limiting grooves are vertically arranged on the inner wall of the final processing box, and sand filter plates, expanded soil filter plates and foam filter plates for fine filtration are respectively inserted into the limiting grooves.

[0012] Preferably, a discharge assembly is provided at the bottom of the second pretreatment chamber, and a drain valve for discharging wastewater is provided at the bottom of the third pretreatment chamber and the final treatment box.

[0013] This application also relates to a wastewater treatment method for washing medicinal materials, including the following steps:

[0014] S1: By connecting the equipment to the sewage pipe, sewage is introduced into the first pretreatment chamber. Floating objects such as Chinese medicine residue and debris in the sewage float on the surface of the sewage. At this time, the first rotating drive component causes the rotating shaft to rotate. The rotating shaft causes the frame to rotate, which in turn causes the filter screen to rotate around the rotating shaft, so that the floating objects on the water surface will enter the filter screen for collection.

[0015] S2: Wastewater flows into the second pretreatment chamber. After electricity is applied to the electrode plates, strong oxidizing free radicals are generated at the anode, which oxidize the organic matter in the wastewater into harmless or low-toxic substances, or oxidize heavy metal ions into high-valence states. At the cathode, reducing metal cations are generated, which reduce heavy metal ions into low-valence states or elemental substances. At the same time, the cathode and anode also adsorb charged or uncharged ions, molecules or colloidal particles in the wastewater. After the equipment stops, these particles are shaken off by the vibration of the electrode plates and then discharged through the discharge assembly.

[0016] S3: Wastewater enters the third pretreatment chamber through the filter element, where other untreated impurities are filtered out. Disinfectant in the reagent tank can enter the third pretreatment chamber to disinfect the wastewater. Subsequently, the wastewater passes through the bar screen to filter impurities again. When there are too many impurities on the bar screen, the scraper can move up and down to prevent the bar screen from clogging.

[0017] S4: Wastewater can undergo final filtration through sand filter plates, expanded soil filter plates, and foam filter plates to remove color and odor from the wastewater. The purified water is then discharged into the external environment.

[0018] Compared with the prior art, the beneficial effects of the present invention are: the multi-stage wastewater treatment equipment and the wastewater treatment method for washing medicinal materials have a reasonable structure and the following advantages:

[0019] By installing a rotating shaft in the first pretreatment chamber, when there are floating objects on the surface of the sewage, the first rotating drive causes the rotating shaft to rotate, which in turn causes the frame to rotate. Consequently, the filter screen rotates around the rotating shaft, collecting the floating objects on the water surface into the filter screen. When the filter screen is full, it can be removed from the frame and replaced with a new filter screen. This method can collect floating objects in sewage, avoiding excessive clogging of internal pipes and filter components. At the same time, the filter screen can be replaced, which is inexpensive and reduces the frequency of manual cleaning. This method has a higher efficiency in collecting floating objects. Attached Figure Description

[0020] Figure 1 This is an external three-dimensional schematic diagram of a multi-stage wastewater treatment device.

[0021] Figure 2 This is a three-dimensional schematic diagram of the internal structure of a multi-stage wastewater treatment device.

[0022] Figure 3This is a schematic diagram of the first internal structure of a multi-stage wastewater treatment device, comprising a first pretreatment chamber, a second pretreatment chamber, a third pretreatment chamber, and a final treatment tank.

[0023] Figure 4 This is a three-dimensional structural diagram of the discharge component of a multi-stage wastewater treatment equipment.

[0024] Figure 5 This is a schematic diagram of the first three-dimensional structure of a floating debris collection component in a multi-stage wastewater treatment device.

[0025] Figure 6 This is a schematic diagram of the second three-dimensional structure of a floating debris collection component in a multi-stage wastewater treatment device.

[0026] Figure 7 This is a schematic diagram of the internal structure of the first pretreatment chamber, the second pretreatment chamber, the third pretreatment chamber, and the final treatment tank of a multi-stage wastewater treatment device.

[0027] Figure 8 This is a top view schematic diagram of a multi-stage wastewater treatment equipment.

[0028] Figure 9 A multi-stage wastewater treatment equipment Figure 3 Enlarged structural diagram at point A in the middle.

[0029] Figure 10 A multi-stage wastewater treatment equipment Figure 3 Enlarged structural diagram at point B.

[0030] The diagram is labeled as follows: 1. Wastewater treatment tank body; 101. First pretreatment chamber; 1011. Floating matter collection assembly; 10111. First rotary drive component; 10112. Support frame; 10113. Frame; 10114. Filter screen; 10115. Clip; 10116. Rotating shaft; 102. Second pretreatment chamber; 1021. Adsorption assembly; 10211. Electrode plate; 10212. Vibration motor; 10213. Guide rod; 10214. Return spring; 103. Third pretreatment chamber; 1031. Chemical tank; 1032. Limiting frame; 10321. Buckle; 1032... 2. Filter element; 10323. Sleeve; 1033. Cleaning assembly; 10331. Grating plate; 10332. Scraper; 10333. Second rotary drive component; 10334. Pulley; 10335. Limiting plate; 104. Final treatment box; 1041. Limiting groove; 10411. Sand filter plate; 10412. Expanded soil filter plate; 10413. Foam filter plate; 2. Discharge assembly; 201. Discharge port; 202. First connecting rod; 203. Second connecting rod; 204. Sealing plate; 205. Third connecting rod; 206. Telescopic drive component; 207. Fourth connecting rod; 3. Drain valve. Detailed Implementation

[0031] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figure 1 — Figure 10 As shown, the present invention provides a multi-stage wastewater treatment device and a wastewater treatment method for washing medicinal materials. The device includes a wastewater treatment tank body 1, which is internally divided by partitions into a first pretreatment chamber 101, a second pretreatment chamber 102, a third pretreatment chamber 103, and a final treatment chamber 104. The partitions divide the interior of the wastewater treatment tank body 1 into multiple independent but interconnected treatment chambers, allowing the wastewater to undergo different treatment stages step by step. The first pretreatment chamber 101 is equipped with a floating debris collection assembly 1011 for collecting floating debris from the wastewater. The floating debris collection assembly 1011 includes a support frame 10112, which is fixedly installed in the first pretreatment chamber 101. The support frame 10112 provides a stable support structure for the floating debris collection assembly 1011, ensuring that it does not shake or tilt during operation. A rotating shaft 10116 is vertically rotatably mounted at the center of the support frame 10112; the floating object collection assembly 1011 also includes a first rotating drive 10111 and a frame 10113. The first rotating drive 10111 is fixed to the center of the top of the support frame 10112, and the output end of the first rotating drive 10111 passes through the support frame 10112 and is connected to the output end of the rotating shaft 10116 and is used to drive the rotating shaft 10116 to rotate. The first rotating drive 10111 provides rotational power to the rotating shaft 10116, driving the rotating shaft 10116 to rotate. The frame 10113 is fixed to the outside of the rotating shaft 10116, and several sets of clips 10115 are distributed on the frame 10113. A filter screen 10114 for collecting floating objects is hung on the outside of the clips 10115. The frame 10113 fixes the shape of the filter screen 10114. The clips 10115 are used to hang the filter screen 10114 to ensure that the filter screen 10114 will not fall off or shift during rotation. The rotating shaft 10116 drives the filter screen 10114 to rotate by rotation, thereby realizing the collection and removal of floating objects.

[0033] In this embodiment, when there are floating objects on the surface of the sewage, the first rotary drive 10111 causes the rotary shaft 10116 to rotate, the rotary shaft 10116 causes the frame 10113 to rotate, and then the filter screen 10114 rotates around the rotary shaft 10116, collecting the floating objects on the water surface into the filter screen 10114. When the filter screen 10114 is full, the filter screen 10114 can be removed from the frame 10113 and replaced with a new filter screen 10114.

[0034] The second pretreatment chamber 102 is equipped with an adsorption assembly 1021 for adsorbing impurities in wastewater. The adsorption assembly 1021 includes an electrode plate 10211 and a guide rod 10213. The guide rod 10213 is horizontally fixed inside the second pretreatment chamber 102 and is used to support the electrode plate 10211. The electrode plate 10211 slides on the guide rod 10213. The guide rod 10213 serves as a support structure for the electrode plate 10211, ensuring that the electrode plate 10211 can slide and vibrate stably. The electrode plate 10211 is composed of several metal sheets stacked on top of each other. Two electrode plates 10211 are symmetrically arranged on the guide rod 10213.

[0035] In this embodiment, by passing a direct current through the electrode plate 10211, one electrode plate 10211 serves as the anode and the other electrode plate 10211 serves as the cathode. Strong oxidizing free radicals are generated on the anode, which oxidize the organic matter in the wastewater into harmless or low-toxic substances, or oxidize heavy metal ions into a high-valence state. Metal cations with reducing properties are generated on the cathode, which reduce heavy metal ions into a low-valence state or elemental form. At the same time, the cathode and anode also adsorb charged or uncharged ions, molecules or colloidal particles in the wastewater.

[0036] The adsorption assembly 1021 also includes a vibration motor 10212 and a return spring 10214. The return spring 10214 is sleeved on the guide rod 10213 to reset the electrode plates 10211. One end of the return spring 10214 is connected to one of the electrode plates 10211, and the other end is connected to the other electrode plate 10211. The vibration motor 10212 is fixedly mounted on the electrode plates 10211 and is used to vibrate the electrode plates 10211. The vibration motor 10212 causes the electrode plates 10211 to vibrate periodically. This vibration helps to loosen and remove impurities adsorbed on the electrode plates 10211.

[0037] The third pretreatment chamber 103 is equipped with a limiting frame 1032, and a reagent tank 1031 for storing disinfectant is placed on the limiting frame 1032. The limiting frame 1032 is used to fix and support the reagent tank 1031. The bottom of the reagent tank 1031 is also connected to a pipe with a solenoid valve for discharging disinfectant.

[0038] In this embodiment, the reagent tank 1031 is used to store disinfectant. Disinfectant is a chemical agent that kills or removes pathogenic microorganisms in wastewater, and is of great significance in preventing waterborne diseases. When disinfectant needs to be added to the wastewater, the solenoid valve opens after receiving a command from the control system, and the disinfectant flows through a pipe into the third pretreatment chamber 103, mixing with the wastewater for disinfection. When the predetermined dosage or disinfection time is reached, the solenoid valve closes, stopping the addition of disinfectant.

[0039] A sleeve 10323 is installed on the partition between the third pretreatment chamber 103 and the second pretreatment chamber 102, and a filter element 10322 for filtration is inserted into the sleeve 10323. Several clips 10321 are distributed around the outside of the sleeve 10323 to facilitate the removal of the filter element 10322. One end of each clip 10321 is engaged with the filter element 10322. These clips, distributed around the outside of the sleeve 10323, are used to secure and remove the filter element 10322. This design makes the replacement and maintenance of the filter element 10322 more convenient and quick, ensuring that the filter element 10322 will not loosen or shift during filtration. When it is necessary to replace the filter element 10322, simply open the clips 10321 to easily remove it.

[0040] A cleaning assembly 1033 is also provided near the bottom of the third pretreatment chamber 103, and the cleaning assembly 1033 includes a limiting plate 10335. The limiting plate 10335 is symmetrically installed on the partition between the third pretreatment chamber 103 and the final treatment box 104, and a grid plate 10331 for filtering impurities is slidably arranged in the limiting plate 10335. The main function of the limiting plate 10335 is to provide a sliding track and support for the grid plate 10331, while limiting its sliding range and preventing it from falling off or shifting from the sliding track. When sewage flows through the grid plate 10331, these impurities and suspended solids will be intercepted on the grid plate 10331, while the clean water continues to flow to the next stage treatment chamber through the grid plate 10331.

[0041] In this embodiment, regular or real-time cleaning operations can ensure that the wastewater treatment equipment is always kept in good working condition.

[0042] The cleaning assembly 1033 also includes a scraper 10332, a second rotary drive 10333, and a pulley 10334. The scraper 10332 is used to scrape away impurities on the grid plate 10331. The second rotary drive 10333 is fixed to the partition between the third pretreatment chamber 103 and the final treatment chamber 104 by a connecting block. The output end of the second rotary drive 10333 is connected to the pulley 10334 and drives the pulley 10334 to rotate. Through rotation, the pulley 10334 drives the belt to circulate, thereby driving the scraper 10332 to reciprocate. A belt is sleeved between the pulleys 10334 for the scraper 10332 to reciprocate up and down. The scraper 10332 achieves up and down reciprocating motion through the belt. This motion can effectively clean impurities on the grid plate 10331 and prevent blockage. Both ends of the scraper 10332 are fixed to one strand of the belt to ensure that the scraper 10332 can move with the movement of the belt. One side of the scraper 10332 contacts the outside of the grid plate 10331 and is used to clean impurities on the grid plate 10331. Both ends of the scraper 10332 are fixed to one strand of the belt. The second rotary drive 10333 provides power to the cleaning assembly 1033, drives the pulley 10334 to rotate, and thus drives the belt and scraper 10332 to move.

[0043] In this embodiment, when it is necessary to clean impurities on the grid plate 10331, the second rotary drive 10333 is activated, driving the pulley 10334 to rotate. As the pulley 10334 rotates, the belt begins to circulate. Since both ends of the scraper 10332 are fixed to one strand of the belt, the scraper 10332 also moves up and down reciprocally with the belt. During the movement, one side of the scraper 10332 is in close contact with the outside of the grid plate 10331, scraping away impurities on the grid plate 10331 and achieving the cleaning function. The cleaning component 1033 is electrically driven to achieve automatic cleaning, eliminating the need for manual operation and improving work efficiency. The close contact between the scraper 10332 and the grid plate 10331 effectively removes impurities accumulated on the grid plate 10331, preventing blockage. The cleaning component 1033 is installed on the partition between the third pretreatment chamber 103 and the final treatment box 104, without occupying extra space, resulting in a compact structure.

[0044] Several limiting grooves 1041 are vertically arranged on the inner wall of the final treatment box 104. Sand filter plate 10411, expanded soil filter plate 10412 and foam filter plate 10413 for fine filtration are respectively inserted into the limiting grooves 1041.

[0045] Sand filter media plate 10411 is mainly used to filter large particulate impurities and suspended solids in wastewater. The gaps between the sand particles can trap these impurities while allowing water molecules to pass through, thus achieving preliminary filtration. Sand filter media plate 10411 has good filtration effect and a long service life, making it one of the commonly used filter media in wastewater treatment. Expanded soil filter media plate 10412 is mainly used to remove organic matter and colloidal particles from wastewater. Expanded soil has a large specific surface area and adsorption capacity, effectively removing these difficult-to-filter pollutants, odors, and discoloration. Foam filter media plate 10413 is mainly used to remove tiny particles and bacteria and other microorganisms from wastewater. Foam filter media has extremely small pore size and a large specific surface area, capable of trapping these tiny pollutants and playing a bactericidal and disinfecting role, ensuring that the treated water quality meets high standards. Meanwhile, regular cleaning and replacement of filter media plates can maintain the continuous and stable operation of the filtration system.

[0046] The bottom of the second pretreatment chamber 102 is provided with a discharge assembly 2, and the bottom of the third pretreatment chamber 103 and the final treatment box 104 are provided with a drain valve 3 for discharging sewage. When sewage or residue in the equipment needs to be discharged, the drain valve 3 can be opened to discharge it.

[0047] The discharge assembly 2 includes a discharge port 201 and a sealing plate 204. A fourth connecting rod 207 is connected between the discharge port 201 and the sealing plate 204. One end of the fourth connecting rod 207 is movably disposed outside the discharge port 201, and the other end of the fourth connecting rod 207 is movably disposed outside the sealing plate 204. A third connecting rod 205 and a second connecting rod 203 are connected to the outside of the sealing plate 204 via a shaft. One end of the second connecting rod 203 is movably disposed outside the discharge port 201. A telescopic drive member 206 is movably disposed between the discharge port 201 and the third connecting rod 205. The output end of the telescopic drive member 206 is movably connected to the third connecting rod 205 via a shaft. One end of the second connecting rod 203 is movably connected to a first connecting rod 202. One end of the first connecting rod 202 is connected to the outside of the discharge port 201 via a shaft.

[0048] In this embodiment, when impurities need to be discharged or cleaned, the telescopic drive member 206 begins to extend. This action is translated into movement of the sealing plate 204 via a linkage mechanism, causing it to gradually move away from the discharge port 201, thereby opening the discharge port 201. At this time, impurities and deposits accumulated at the bottom of the pretreatment chamber can be discharged through the discharge port 201.

[0049] Working Principle: During use, the equipment needs to be connected to a sewage pipe. After the Chinese medicinal herbs are washed, the sewage is pumped into the first pretreatment chamber 101. Medicinal herb residue or other debris will float on the surface of the sewage. At this time, by activating the first rotary drive 10111, the rotary shaft 10116 rotates. The rotary shaft 10116 drives the filter screen 10114 to rotate around the rotary shaft 10116. The filter screen 10114 continuously collects the floating debris on the water surface, while the lower layer of water enters the second pretreatment chamber 102. At this time, by applying direct current to the electrode plate 10211, one electrode plate 102... 11 is the anode, and the other electrode plate 10211 is the cathode. Strongly oxidizing free radicals are generated at the anode, oxidizing organic matter in the wastewater into harmless or low-toxic substances, or oxidizing heavy metal ions to higher valence states. Reducing metal cations are generated at the cathode, reducing heavy metal ions to lower valence states or elemental forms. Simultaneously, the cathode and anode adsorb charged or uncharged ions, molecules, or colloidal particles from the wastewater. Subsequently, the wastewater enters the third pretreatment chamber 103 from filter element 10322, where filter element 10322 further filters impurities. Then, the solenoid valve on the reagent tank 1031 opens, allowing disinfectant to flow into the third pretreatment chamber 103. In the process, the wastewater is disinfected, and then filtered again through a bar screen 10331. If the bar screen 10331 becomes clogged, the second rotary drive 10333 is activated, causing the pulley 10334 to rotate. This, in turn, causes the scraper 10332 to move up and down, scraping off impurities from the bar screen 10331 and preventing clogging. The wastewater then undergoes further filtration through sand filter plates 10411, expanded clay filter plates 10412, and foam filter plates 10413, where color and odor are adsorbed, improving the filtration effect and ensuring filtration quality. After completion, when the equipment stops, the vibration motor 10212 causes the electrode plate 10211 to vibrate, and excess impurities fall off the electrode plate 10211. At this time, by activating the telescopic drive component 206, the telescopic drive component 206 moves the third connecting rod 205, which in turn moves the sealing plate 204. The sealing plate 204 flips open, and the impurities can be discharged from the second pretreatment chamber 102. Moreover, the filter screen 10114, filter element 10322, grid plate 10331, sand filter plate 10411, expanded soil filter plate 10412, and foam filter plate 10413 in the entire equipment can all be easily removed. The modular design makes it easy for users to replace and clean them.

[0050] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present 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 all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A multi-stage wastewater treatment device, characterized in that: The system includes a sewage treatment tank body (1), which is divided into a first pretreatment chamber (101), a second pretreatment chamber (102), a third pretreatment chamber (103), and a final treatment tank (104) by a partition. The first pretreatment chamber (101) is provided with a floating object collection assembly (1011) for collecting floating objects in sewage. The floating object collection assembly (1011) includes a support frame (10112), which is fixedly installed in the first pretreatment chamber (101). A rotating shaft (10116) is vertically rotatably provided at the center of the support frame (10112). The floating object collection assembly (1011) further includes a first rotating drive (10111) and a frame (10113). The first rotating drive (10111) is fixed to the center of the top of the support frame (10112), and the output end of the first rotating drive (10111) passes through the support frame (10112) and is connected to the output end of the rotating shaft (10116) and is used to drive the rotating shaft (10116) to rotate. The frame (10113) is fixed to the outside of the rotating shaft (10116), and several sets of clips (10115) are distributed on the frame (10113), and a filter screen (10114) for collecting floating objects is hung on the outside of the clips (10115). The second pretreatment chamber (102) is provided with an adsorption assembly (1021) for adsorbing impurities in wastewater. The adsorption assembly (1021) includes an electrode plate (10211) and a guide rod (10213). The guide rod (10213) is horizontally fixed inside the second pretreatment chamber (102) and is used to support the electrode plate (10211). The electrode plate (10211) slides on the guide rod (10213). The electrode plate (10211) is composed of several metal sheets stacked on top of each other. Two electrode plates (10211) are symmetrically arranged on the guide rod (10213). The third pretreatment chamber (103) is equipped with a limiting frame (1032), and a medicine box (1031) for storing disinfectant is placed on the limiting frame (1032). The bottom of the medicine box (1031) is also connected to a pipe with a solenoid valve for discharging disinfectant. The inner wall of the final processing box (104) is vertically provided with several limiting grooves (1041), and sand filter plates (10411), expanded soil filter plates (10412) and foam filter plates (10413) for fine filtration are respectively inserted in the limiting grooves (1041).

2. The multi-stage wastewater treatment equipment according to claim 1, characterized in that: The adsorption assembly (1021) also includes a vibration motor (10212) and a reset spring (10214). The reset spring (10214) is sleeved on the guide rod (10213) to reset the electrode plate (10211). One end of the reset spring (10214) is connected to one of the electrode plates (10211), and the other end of the reset spring (10214) is connected to the other electrode plate (10211). The vibration motor (10212) is fixedly installed on the electrode plate (10211) and is used to make the electrode plate (10211) vibrate.

3. The multi-stage wastewater treatment equipment according to claim 1, characterized in that: A sleeve (10323) is installed on the partition between the third pretreatment chamber (103) and the second pretreatment chamber (102), and a filter element (10322) for filtration is inserted in the sleeve (10323). Several clips (10321) for easy disassembly of the filter element (10322) are distributed around the outside of the sleeve (10323), and one end of the clip (10321) is engaged with the filter element (10322).

4. The multi-stage wastewater treatment equipment according to claim 3, characterized in that: The third pretreatment chamber (103) is also provided with a cleaning component (1033) near the bottom, and the cleaning component (1033) includes a limiting plate (10335). The limiting plate (10335) is symmetrically installed on the partition between the third pretreatment chamber (103) and the final treatment box (104), and a grid plate (10331) for filtering impurities is slidably provided in the limiting plate (10335).

5. A multi-stage wastewater treatment device according to claim 4, characterized in that: The cleaning assembly (1033) further includes a scraper (10332), a second rotary drive (10333), and a pulley (10334). The second rotary drive (10333) is fixed to the partition between the third pretreatment chamber (103) and the final treatment chamber (104) by a connecting block. The output end of the second rotary drive (10333) is connected to the pulley (10334) and used to drive the pulley (10334) to rotate. A belt for the scraper (10332) to reciprocate up and down is sleeved between the pulleys (10334). One side of the scraper (10332) is in contact with the outside of the grid plate (10331) and is used to clean the impurities on the grid plate (10331). Both ends of the scraper (10332) are fixed to one strand of the belt.

6. The multi-stage wastewater treatment equipment according to claim 1, characterized in that: The bottom of the second pretreatment chamber (102) is provided with a discharge assembly (2), and the bottom of the third pretreatment chamber (103) and the final treatment box (104) are provided with a drain valve (3) for draining sewage.

7. A method for treating wastewater from washing medicinal herbs, utilizing the multi-stage wastewater treatment equipment described in claim 6, characterized in that: Includes the following steps: S1: By connecting the equipment to the sewage pipe, the sewage is introduced into the first pretreatment chamber (101). The Chinese medicine residue and debris in the sewage float on the surface of the sewage. At this time, the first rotating drive (10111) causes the rotating shaft (10116) to rotate. The rotating shaft (10116) causes the frame (10113) to rotate, which in turn causes the filter screen (10114) to rotate around the rotating shaft (10116). As a result, the floating objects on the water surface will enter the filter screen (10114) for collection. S2: Sewage flows into the second pretreatment chamber (102). After the electrode plate (10211) is energized, strong oxidizing free radicals are generated on the anode, which oxidize the organic matter in the wastewater into harmless or low-toxic substances, or oxidize heavy metal ions into high-valence states. Metal cations with reducing properties are generated on the cathode, which reduce heavy metal ions into low-valence states or elements. At the same time, the cathode and anode will also adsorb charged or uncharged ions, molecules or colloidal particles in the wastewater. After the equipment is shut down, these particles are shaken off by the vibration of the electrode plate (10211) and then discharged through the discharge assembly (2). S3: Wastewater enters the third pretreatment chamber (103) through the filter element (10322). Other impurities that have not been cleaned are filtered through the filter element (10322). Disinfectant in the reagent tank (1031) can enter the third pretreatment chamber (103) to disinfect the wastewater. Then the wastewater passes through the grid plate (10331) to filter impurities again. When there are too many impurities on the grid plate (10331), the scraper (10332) can move up and down to avoid clogging of the grid plate (10331). S4: Wastewater can undergo final filtration through sand filter plate (10411), expanded soil filter plate (10412) and foam filter plate (10413) to remove color and odor from the wastewater. The purified water is then discharged into the external environment.

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