A purification laboratory wastewater discharge treatment device and treatment method

Abstract

The application provides a laboratory wastewater purification device and a treatment method, which comprises a purification shell, a centrifugal separation assembly, a floating flocculation collection assembly and an extrusion filtration assembly. The purification shell is composed of a sedimentation shell, a mixing shell and a filtration shell. The centrifugal separation assembly synchronously realizes the mixing reaction of wastewater and reagents, filtration separation and automatic slag cleaning through the double-position switching of a centrifugal permeable membrane. The floating flocculation collection assembly realizes the collection of water surface suspended flocculation and the overflow separation of supernatant by combining with light transmittance detection through the double-position switching of a floating flocculation collection box. The extrusion filtration assembly integrates solid-liquid separation and dehydration functions and directly extrudes the filter residue, floating flocculation and sediment. The treatment method comprises three steps of mixing filtration, automatic slag cleaning and extrusion filtration, realizes the full-process automation of wastewater treatment, and solves the problem of high water content of sludge generated by sedimentation and filter residue generated by filtration.

Description

Technical Field

[0001] This invention belongs to the field of laboratory wastewater discharge treatment technology, and more specifically, it relates to a device and method for purifying laboratory wastewater discharge. Background Technology

[0002] With the rapid development of the scientific research and testing industry, the amount of wastewater generated by various laboratories in universities, research institutes, third-party testing agencies and corporate R&D centers continues to increase. Its components include a variety of pollutants such as acids and alkalis, heavy metals, organic reagents, suspended particulate matter, and residual reagents. Direct discharge will cause serious harm to the water environment and ecosystem. National and local standards for laboratory wastewater discharge are also being tightened.

[0003] Existing laboratory wastewater treatment devices mostly use fixed filter screen structures for their filtration units. After the filter residue accumulates, it needs to be manually disassembled and cleaned, which will interrupt the treatment process. The sedimentation stage generally uses fixed overflow weirs for water discharge, which cannot effectively intercept the flocs suspended on the water surface and easily flow out with the effluent, affecting the treatment effect. Scum collection mostly relies on manual dredging or a separate scum scraping mechanism. However, the sludge produced by sedimentation and the filter residue produced by filtration have a high water content, requiring additional independent dewatering equipment for treatment. At the same time, the filtrate produced during the dewatering process needs to be returned to the front end of the treatment for further treatment. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a purification device and method for treating laboratory wastewater discharge. This addresses the technical issue that in existing wastewater treatment devices, the sludge produced by sedimentation and the filter residue produced by filtration have high water content, requiring additional independent dewatering equipment for treatment. Furthermore, the filtrate generated during the dewatering process needs to be returned to the front end of the treatment process for further treatment.

[0005] The purpose and effectiveness of the purification and treatment device and method for laboratory wastewater discharge of the present invention are achieved by the following specific technical means:

[0006] A device for purifying and treating laboratory wastewater discharge includes:

[0007] The purification shell includes a sedimentation shell, a mixing shell on top of the sedimentation shell, a filter shell on one side of the sedimentation shell, and a filter cake pipe connected to the filter shell on one side of the mixing shell.

[0008] The centrifugal separation component is installed inside the mixing shell. It includes a centrifugal permeation membrane and a centrifugal motor for agitating and mixing laboratory wastewater and chemical reagents. When the centrifugal permeation membrane is in the filtration position, it is horizontally distributed, and the mixture of laboratory wastewater and chemical reagents enters the sedimentation shell through the membrane, while impurities in the mixture remain on the top of the membrane. When the centrifugal permeation membrane is in the cleaning position, it is obliquely distributed, and the agitated mixture pushes impurities through the filter cake tube into the filtration shell.

[0009] A flocculent collection assembly is installed inside the sedimentation shell. The assembly includes a flocculent collection box located at a collection position and an overflow position. An overflow plate is slidably disposed inside the flocculent collection box. When the flocculent collection box is in the collection position, the overflow plate is located inside the box, and the top surface of the box is flush with the water surface of the mixed liquid in the sedimentation shell to collect suspended flocculents. When the box is in the overflow position, the overflow plate is located on top of the box, and flush with the water surface of the mixed liquid in the sedimentation shell to intercept suspended flocculents.

[0010] The squeeze filter assembly is installed inside the filter housing and is used to squeeze and filter impurities, flocculation, and sediment.

[0011] According to a preferred embodiment, a transfer box is provided on one side of the sedimentation shell, a cleaning outlet is provided on one side of the mixing shell, a slag cleaning shell is provided on one side of the cleaning outlet, and the slag cleaning shell is connected to the transfer box through a slag filter pipe. A connecting pipe is provided at the bottom of the transfer box and connected to the filter shell.

[0012] The centrifugal separation assembly also includes a switching plate located at the filtration or cleaning position. A mixing tank is provided on the top of the mixing shell. The top of the mixing tank is provided with a laboratory wastewater inlet pipe and a chemical reagent inlet pipe. A filter port is provided at the bottom of the mixing tank. The switching plate is rotatably installed inside the mixing shell. The centrifugal permeation membrane is annular and is installed on a rotating ring frame. The top of the switching plate is rotatably connected to the rotating ring frame through a rotating shaft. A filter outlet is provided at the top of the switching plate corresponding to the centrifugal permeation membrane.

[0013] When the switching plate is in the filtration position, the bottom of the mixing tank is in contact with the top of the switching plate, and the centrifugal permeation membrane is located inside the filter port to filter the mixed liquid in the mixing tank;

[0014] When the switching plate is in the cleaning position, both the switching plate and the centrifugal permeation membrane are located below the mixing tank. One side of the switching plate is in contact with the cleaning outlet, and the mixed liquid pushes the impurities through the cleaning shell and filter pipe into the transfer box.

[0015] According to a preferred embodiment, a slurry is provided on one side of the slag removal shell, and a sliding sealing plate is provided in the slurry. The top of the sliding sealing plate contacts the switching plate. Two sets of mounting cylinders are provided at the bottom of the cleaning outlet. A sealing spring is provided in the mounting cylinder. The top of the sealing spring is connected to the sliding sealing plate. A first mounting seat is provided on one side of the mixing shell. A cleaning motor for driving the switching plate and the centrifugal permeation membrane to move between the filtration position and the cleaning position is provided on one side of the first mounting seat. The main shaft of the cleaning motor is connected to one side of the switching plate.

[0016] Both sides of the inner wall of the hybrid shell are provided with slots, and the corresponding slots on both sides of the switching plate are provided with mounting slots. A spring is provided in the mounting slot and connected to the inclined block. The inclined block is slidably connected to the mounting slot.

[0017] The centrifugal motor is installed on the top of the mixing tank. The main shaft of the centrifugal motor is connected to a drive shaft. A first connecting seat is provided at the bottom of the drive shaft. A through hole is opened at the bottom of the centrifugal permeation membrane. A second connecting seat is provided at the top of the rotating ring frame.

[0018] The top of the sedimentation shell is provided with a through groove, the mixing shell is provided with a first guide plate corresponding to the through groove, and the bottom of the through groove is provided with a second guide plate.

[0019] According to a preferred embodiment, when the switching plate is in the filtration position, the inclined card block is inserted into the card slot, the first connecting seat is connected to the second connecting seat, the centrifugal motor drives the rotating ring frame and the centrifugal permeation membrane to rotate and mix the laboratory wastewater and chemical reagents in the mixing tank, and the sliding sealing plate seals the cleaning outlet to prevent the mixed liquid after passing through the centrifugal permeation membrane from entering the sludge cleaning shell, so that the filtered mixed liquid can enter the sedimentation shell along the first guide plate and the second guide plate;

[0020] When the switching plate is in the cleaning position, the inclined card block is not inserted into the slot, the first connecting seat and the second connecting seat are not connected, and the sliding sealing plate does not close the cleaning outlet, so that the slag cleaning shell and the mixing shell are connected.

[0021] According to a preferred embodiment, sliding tracks are provided on both sides of the inner wall of the sedimentation shell, and sliding blocks are slidably provided on the adjacent side of the two sets of sliding tracks. The adjacent side of the two sets of sliding blocks is connected to the floc collection box through a first connecting rod. The adjacent side of the two sets of floc collection boxes is connected through two sets of second connecting rods. A linear module is provided on one side of the inner wall of the sedimentation shell. An overflow motor is provided on one side of the linear module to drive the floc collection box to move between the collection position and the overflow position. The slider of the linear module is connected to one of the floc collection boxes through a third connecting rod.

[0022] The floc collection assembly also includes a sliding rail. A mounting plate is provided on one side of the inner wall of the sedimentation shell, and a sliding rail is provided on one side of the mounting plate. The tops of the two overflow plates are connected to a sliding rod. One end of the sliding rod is slidably connected to the sliding rail to move the overflow plates between the collection position and the overflow position.

[0023] According to a preferred embodiment, an output box is provided on the side of the sedimentation shell away from the transfer box. A first output pipe is provided at the bottom of the output box and connected to the subsequent processing device. Two sets of second through holes are provided on the side of the transfer box adjacent to the sedimentation shell. Two sets of third through holes are provided on the side of the output box adjacent to the sedimentation shell. Insertion pipes are provided in the two sets of second through holes and the two sets of third through holes. A first solenoid valve is provided at the end of the insertion pipe away from the fluff collection box. Insertion holes are provided at both ends of the fluff collection box corresponding to the insertion pipes. Rotating seats are provided on both sides of the inner wall of the fluff collection box. The rotating seats are rotatably connected to the sealing plate through a flip-top spring and a rotating shaft.

[0024] When the floc collection box is in the collection position, the distance between the floc collection box and the transfer box is less than the distance between the floc collection box and the output box. Two sets of through pipes on one side of the transfer box are inserted into two sets of through holes on the side of the floc collection box near the transfer box. The sealing plate seals the other two sets of through holes, so that the suspended flocs collected by the floc collection box enter the transfer box through the through pipes.

[0025] When the flocculation collection box is in the overflow position, the distance between the flocculation collection box and the transfer box is greater than the distance between the flocculation collection box and the output box. Two sets of through pipes on one side of the output box are inserted into two sets of through holes on the side of the flocculation collection box near the output box. The sealing plate seals the other two sets of through holes, so that the mixed liquid after sedimentation collected by the flocculation collection box enters the output box through the through pipes.

[0026] According to a preferred embodiment, a second mounting base is provided on one side of the inner wall of the sedimentation shell. The bottom of the second mounting base is connected to the mounting base via two sets of guide rods. A lifting screw is provided between the second mounting base and the mounting base. A lifting motor is connected to the top of the second mounting base. The main shaft of the lifting motor is connected to the lifting screw. Both sets of guide rods are slidably connected to a sliding seat. A threaded sleeve is provided on one side of the sliding seat and is connected to the lifting screw. The bottom of the sliding seat is connected to the detection base via two sets of connecting rods. A transmittance detector and a transmittance detection receiver for detecting the transmittance of the mixed liquid are correspondingly provided at the bottom of the sliding seat and the top of the detection base. The water surface of the mixed liquid is located between the transmittance detector and the transmittance detection receiver. A second solenoid valve is provided at the bottom of the sedimentation shell and connected to the filter shell. The second solenoid valve is used to allow impurities to settle and enter the filter shell through the second solenoid valve.

[0027] According to a preferred embodiment, the extrusion filter assembly includes two sets of partition plates. The filter housing is provided with two sets of partition plates, which divide the filter housing into a receiving chamber and an extrusion chamber. The top of the receiving chamber is connected to a connecting pipe, and one side of the receiving chamber is connected to a second solenoid valve. The top of both sets of partition plates is provided with a flow guiding slope. Two sets of sliding grooves are provided on both sides of the inner wall of the filter housing. One set of partition plates is slidably connected to the two sets of sliding grooves through two side moving blocks. A moving cylinder is provided on one side of the filter housing. One end of the moving cylinder is connected to one set of partition plates to drive it to move between the receiving position and the extrusion position.

[0028] When the separator is in the receiving position, the adjacent sides of the two sets of separators are in contact, thus separating the receiving chamber from the extrusion chamber.

[0029] When the separator plates are in the squeezing position, the adjacent sides of the two sets of separator plates do not contact each other, forming a gap, which allows impurities, floating lint and sediment in the receiving cavity to enter the squeezing cavity through the gap.

[0030] According to a preferred embodiment, the extrusion filter assembly includes an extrusion plate located at a receiving position or an extrusion position, an extrusion plate disposed in an extrusion chamber, an extrusion filter channel opened at the top of the extrusion plate, an extrusion permeation membrane disposed in the extrusion filter channel, an extrusion cylinder and a second output pipe disposed at the bottom of the filter housing, one end of the second output pipe being connected to a subsequent processing device, the top of the extrusion cylinder being connected to the extrusion plate for driving the extrusion plate to move between the receiving position and the extrusion position, an ejection cylinder disposed on one side of the filter housing, a slot opened on one side of the extrusion chamber, an ejection plate disposed in the slot, one end of the ejection cylinder being connected to the ejection plate, and an impurity discharge pipe disposed on the other side of the filter housing.

[0031] When the extrusion plate is in the receiving position, the bottom of the extrusion plate contacts the bottom surface of the extrusion chamber, so that the second output tube is not connected to the extrusion chamber;

[0032] When the extrusion plate is in the extrusion position, the bottom of the extrusion plate does not contact the bottom surface of the extrusion chamber, so that the second output pipe is connected to the extrusion chamber. An impurity discharge channel is formed between the top of the extrusion plate and the two sets of partition plates. The push cylinder pushes the push plate to push the impurities, flocs and sediments in the impurity discharge channel into the impurity discharge pipe.

[0033] A method for treating wastewater discharge from a purified laboratory, applied to the aforementioned wastewater treatment device, includes the following steps:

[0034] S1: Input laboratory wastewater and chemical reagents into the mixing tank. The centrifugal motor drives the centrifugal permeation membrane to rotate for stirring and filtration.

[0035] S2: When impurities accumulate at the top of the centrifugal permeation membrane for a preset time, the cleaning motor is started to drive the switching plate and the centrifugal permeation membrane to the cleaning position and open the cleaning outlet. The impurities enter the transfer box through the cleaning outlet and then reset.

[0036] S3: The transmittance of the mixed liquid is obtained based on the transmittance detector and the transmittance detection receiver. When the transmittance is lower than the preset threshold, the floc collection box moves to the collection position to guide the suspended flocs on the water surface into the transfer box. When the transmittance is higher than the preset threshold, the floc collection box moves to the overflow position. The overflow plate intercepts the suspended flocs on the water surface, and the supernatant enters the floc collection box through the gap of the overflow plate and is discharged to the subsequent treatment device.

[0037] S4: The sediment at the bottom of the sedimentation shell, the impurities in the transfer box and the suspended flocculation flow into the filter shell. The extrusion cylinder is started to drive the extrusion plate to move upward to the extrusion position. The filtrate filtered by the extrusion membrane is transported to the subsequent treatment device. The ejector plate pushes the extruded dry residue out from the impurity discharge pipe.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. By switching between the filtration and cleaning positions of the centrifugal permeation membrane in the centrifugal separation component, the centrifugal permeation membrane can simultaneously perform the dual functions of mixing and filtration. In the filtration position, the mixing reaction of laboratory wastewater and chemical reagents and the filtration of impurities are completed simultaneously, eliminating the need for additional independent mixing and filtration units and simplifying the device structure. When filter residue accumulates, the centrifugal permeation membrane switches to the cleaning position, using the power of the mixed liquid churning in the mixing tank to push the filter residue out, eliminating the need for manual disassembly of the filter screen for cleaning and avoiding interruption of the processing flow during the cleaning process.

[0040] 2. By switching between the collection position and the overflow position of the floc collection component, the integrated function of floc collection and supernatant overflow is realized. In the collection position, the top surface of the floc collection box is flush with the water surface, collecting the suspended flocs on the water surface and transporting them to the transfer box, eliminating the need for manual removal of scum. In the overflow position, the overflow plate rises to the top of the floc collection box, flush with the water surface, to intercept the suspended flocs, allowing the supernatant after sedimentation to flow out through the gaps. This prevents flocs from flowing out with the effluent and affecting the treatment effect, reducing the failure points and maintenance costs of the device. Moreover, the floc collection and overflow process does not disturb the sludge layer at the bottom of the sedimentation water, ensuring the stability of the sedimentation effect.

[0041] 3. By setting up the extrusion filtration component, solid-liquid separation and dewatering functions are integrated into the same unit. It can directly extrude and filter the filter residue generated by centrifugal separation, the flocculent material collected from floating flocs, and the sludge generated from sedimentation. There is no need to configure an additional independent dewatering equipment, which reduces the overall footprint and equipment investment cost of the device. The filtrate generated during the extrusion process is directly transported to the subsequent treatment device through the second output pipe, without the need to return it to the front end of the treatment for reprocessing, which reduces the operating load of the system. At the same time, the dry residue after extrusion has a low moisture content, which facilitates subsequent collection, transportation and harmless disposal, simplifying the solid waste treatment process. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the assembled structure of the present invention;

[0043] Figure 2 This is a schematic diagram of the unfolded structure of the present invention;

[0044] Figure 3 This is a schematic diagram of the structure of the mixing tank and the switching plate assembled in this invention;

[0045] Figure 4 This is a schematic diagram of the structure of the mixing tank and the switching plate after separation in this invention;

[0046] Figure 5 yes Figure 4 Enlarged view of region A in the middle;

[0047] Figure 6 This is a schematic diagram of the structure after the hybrid outer shell and sliding sealing plate are assembled in this invention;

[0048] Figure 7 This is a schematic diagram of the structure after the hybrid outer shell and sliding sealing plate are separated in this invention;

[0049] Figure 8 This is a schematic diagram of the structure of the centrifugal permeation membrane and the switching plate in the filtration position in this invention;

[0050] Figure 9 This is a schematic diagram of the structure of the centrifugal permeation membrane and the switching plate in the cleaning position in this invention;

[0051] Figure 10 This is a schematic diagram of the assembled structure of the precipitation shell and the output box in this invention;

[0052] Figure 11 This is a schematic diagram of the structure after the precipitation shell and output box are separated in this invention;

[0053] Figure 12 This is a schematic diagram of the structure of the floating lint collection box and the overflow plate assembled in this invention;

[0054] Figure 13 This is a schematic diagram of the structure of the floating lint collection box and the overflow plate after being separated in this invention;

[0055] Figure 14 yes Figure 13 Enlarged view of region B in the middle;

[0056] Figure 15 This is a schematic diagram of the structure of the floating lint collection box and the overflow plate when they are located in the collection position in this invention;

[0057] Figure 16This is a schematic diagram of the structure of the floating lint collection box and the overflow plate when they are located at the overflow position in this invention;

[0058] Figure 17 This is a schematic diagram of the structure of the second mounting base and the sliding base after assembly in this invention;

[0059] Figure 18 This is a schematic diagram of the structure after the second mounting base and the sliding base are separated in this invention;

[0060] Figure 19 This is a schematic diagram of the assembled structure of the extrusion filter assembly in this invention;

[0061] Figure 20 This is a schematic diagram of the disassembled structure of the extrusion filter assembly in this invention;

[0062] Figure 21 This is a schematic diagram of the structure when the extrusion plate and the separator plate are located in the receiving position in this invention;

[0063] Figure 22 This is a schematic diagram of the structure when the extrusion plate and the partition plate are located in the extrusion position in this invention;

[0064] Figure 23 This is a flowchart of the steps in a method for treating laboratory wastewater discharge according to the present invention.

[0065] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0066] 101. Sedimentation shell; 102. Mixing shell; 103. Filtration shell; 104. Filter residue pipe; 105. Transfer box; 106. Connecting pipe; 107. Through channel; 108. Output box; 109. First output pipe;

[0067] 201. Centrifugal permeation membrane; 202. Centrifugal motor; 203. Cleaning outlet; 204. Cleaning shell; 205. Switching plate; 206. Mixing tank; 207. Laboratory wastewater inlet pipe; 208. Chemical reagent inlet pipe; 209. Filter port; 211. Rotating ring frame; 212. Rotating shaft; 213. Filter outlet; 214. Sliding sealing plate; 215. Mounting cylinder; 216. First mounting seat; 217. Cleaning motor; 218. Slot; 219. Mounting groove; 220. Spring; 221. Inclined locking block; 222. Drive shaft; 223. First connecting seat; 224. Second connecting seat; 225. First guide plate; 226. Second guide plate; 227. Sealing spring;

[0068] 301. Floating fluff collection box; 302. Overflow plate; 303. Sliding rail; 304. Sliding block; 305. First connecting rod; 306. Second connecting rod; 307. Linear module; 308. Overflow motor; 309. Third connecting rod; 310. Actuating slide rail; 311. Mounting plate; 313. Actuating connecting rod; 316. Through-tube; 317. First solenoid valve; 318. Through-hole; 319. Rotating seat; 320. Flip-top spring; 321. Sealing plate; 322. Second mounting seat; 323. Guide rod; 324. Mounting base; 325. Lifting screw; 326. Lifting motor; 327. Sliding seat; 328. Threaded sleeve; 329. Connecting rod; 330. Detection base; 331. Transmittance detector; 332. Transmittance detection receiver; 333. Second solenoid valve;

[0069] 401. Separator plate; 402. Receiving chamber; 403. Squeezing chamber; 404. Moving block; 405. Moving cylinder; 406. Squeezing plate; 407. Squeezing filter channel; 408. Squeezing permeation membrane; 409. Squeezing cylinder; 410. Second output pipe; 411. Impurity discharge pipe; 412. Impurity discharge channel; 413. Guide slope; 414. Push-out plate; 415. Push-out cylinder. Detailed Implementation

[0070] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solutions of the present invention, but should not be used to limit the scope of protection of the present invention.

[0071] Example:

[0072] As attached Figures 1 to 22 As shown:

[0073] This invention provides a device for purifying laboratory wastewater discharge treatment, comprising: a purification shell, the purification shell including a sedimentation shell 101, the interior of the sedimentation shell 101 being a chamber for wastewater sedimentation reaction, a mixing shell 102 disposed on the top of the sedimentation shell 101, a filter shell 103 disposed on one side of the sedimentation shell 101, the filter shell 103 providing a sealed space for solid-liquid compression separation, and a filter residue pipe 104 connected to the filter shell 103 disposed on one side of the mixing shell 102; a centrifugal separation component installed inside the mixing shell 102, the centrifugal separation component including a centrifugal permeation membrane 201 for agitating and mixing laboratory wastewater and chemical reagents, and a centrifugal motor 202, the centrifugal motor 202 being a centrifugal permeation membrane 201 for agitating and mixing laboratory wastewater and chemical reagents. The rotation of membrane 201 provides the power. When the centrifugal permeation membrane 201 is in the filtration position, it is horizontally distributed. The centrifugal motor 202 drives the centrifugal permeation membrane 201 to rotate. During the rotation, the laboratory wastewater and chemical reagents in the mixing shell 102 are mixed, allowing them to fully react and generate impurities. The liquid after the reaction enters the sedimentation shell 101 through the pores of the centrifugal permeation membrane 201, and the solid impurities in the mixed liquid are intercepted and retained at the top of the centrifugal permeation membrane 201. When the centrifugal permeation membrane 201 is in the cleaning position, it is obliquely distributed. The flow force generated by the churning mixed liquid in the mixing shell 102 pushes the impurities retained at the top of the centrifugal permeation membrane 201 to move. This allows impurities to enter the filter housing 103 through the filter cake pipe 104. A floc collection assembly is installed inside the sedimentation housing 101. The floc collection assembly includes a floc collection box 301 located at the collection position and the overflow position. An overflow plate 302 is slidably disposed inside the floc collection box 301, and the overflow plate 302 can slide up and down along the inner wall of the floc collection box 301. When the floc collection box 301 is in the collection position, the overflow plate 302 is located inside the floc collection box 301, and the top surface of the floc collection box 301 is flush with the water surface of the mixed liquid in the sedimentation housing 101. Suspended flocs floating on the water surface enter the floc collection box 301 with the liquid flow, achieving the collection of suspended flocs. When the floc collection box 301 is in the overflow position... The overflow plate 302 slides to the top of the floc collection box 301, and the top surface of the overflow plate 302 is flush with the water surface of the mixed liquid in the sedimentation shell 101. The suspended flocs on the water surface are blocked by the overflow plate 302 and cannot pass through. The supernatant after sedimentation enters the interior of the floc collection box 301 through the gap of the overflow plate 302, realizing the separation of the supernatant and the suspended flocs. The squeeze filter assembly is installed in the filter shell 103. The squeeze filter assembly is used to squeeze and filter the impurities from the centrifugal separation assembly, the suspended flocs collected by the floc collection assembly, and the sediment generated at the bottom of the sedimentation shell 101, squeezing out the water in the solid material, reducing the water content of the solid material, and the separated filtrate can be directly transported to the subsequent treatment stage.

[0074] A transfer box 105 is provided on one side of the sedimentation shell 101. The transfer box 105 is used to temporarily store the filter residue produced by the centrifugal separation component and the suspended flocculation collected by the floc collection component, which plays a role in material buffering and temporary storage, preventing the material from directly entering the filter shell 103 and causing feed blockage. A cleaning outlet 203 is provided on one side of the mixing shell 102. The cleaning outlet 203 is used to discharge the filter residue accumulated on the top of the centrifugal permeation membrane 201. A cleaning shell 204 is provided on one side of the cleaning outlet 203. The cleaning shell 204 is used to receive the filter residue flowing out of the cleaning outlet 203. One side of the cleaning shell 204 is open to... The filter residue pipe 104 is connected to the transfer box 105. The filter residue pipe 104 is used to transport the filter residue inside the cleaning shell 204 to the interior of the transfer box 105. The bottom of the transfer box 105 is provided with a connecting pipe 106 connected to the filter shell 103. The connecting pipe 106 is used to transport the filter residue temporarily stored in the transfer box 105 and the suspended flocculation to the extrusion filter assembly inside the filter shell 103 for subsequent processing. The centrifugal separation assembly also includes a switching plate 205 located at the filtration position or the cleaning position. The switching plate 205 is used to drive the centrifugal permeation membrane 201 to switch positions between the filtration position and the cleaning position, mixing... A mixing tank 206 is installed on the top of the outer casing 102. The mixing tank 206 provides a sealed space for the mixing reaction of laboratory wastewater and chemical reagents. A laboratory wastewater inlet pipe 207 and a chemical reagent inlet pipe 208 are installed on the top of the mixing tank 206. The laboratory wastewater inlet pipe 207 is used to transport the laboratory wastewater to be treated into the mixing tank 206, and the chemical reagent inlet pipe 208 is used to transport the corresponding chemical reagents required for treatment into the mixing tank 206. A filter port 209 is opened at the bottom of the mixing tank 206, serving as a channel for the mixed liquid to flow out of the mixing tank 206. A switching plate 205 is rotatably disposed inside the mixing shell 102. The centrifugal permeation membrane 201 is annular and is mounted on a rotating ring frame 211. The rotating ring frame 211 is used to fix and support the centrifugal permeation membrane 201. The top of the switching plate 205 is rotatably connected to the rotating ring frame 211 via a rotating shaft 212. The rotating shaft 212 enables the rotating ring frame 211 to rotate relative to the switching plate 205. A filter outlet 213 is opened at the top of the switching plate 205 corresponding to the centrifugal permeation membrane 201. The filter outlet 213 is used to allow the mixed liquid filtered by the centrifugal permeation membrane 201 to pass through.

[0075] In this embodiment, when the switching plate 205 is in the filtration position, the bottom of the mixing tank 206 contacts the top of the switching plate 205, forming a closed mixing reaction space at the bottom of the mixing tank 206. The centrifugal permeation membrane 201 is located inside the filter port 209, filtering the mixed liquid in the mixing tank 206. The filtered mixed liquid flows into the lower part of the mixing shell 102 through the filter outlet 213, and then enters the sedimentation shell 101 for sedimentation treatment. When the switching plate 205 is in the cleaning position, both the switching plate 205 and the centrifugal permeation membrane 201 are located below the mixing tank 206. One side of the switching plate 205 contacts the cleaning outlet 203, so that the inside of the mixing tank 206 is connected to the slag cleaning shell 204 through the cleaning outlet 203. The flow force generated by the churning mixed liquid in the mixing tank 206 pushes the filter residue remaining on the top of the centrifugal permeation membrane 201 to move, so that the filter residue enters the slag cleaning shell 204 through the cleaning outlet 203, and then enters the transfer box 105 through the filter residue pipe 104 to complete the discharge of the filter residue.

[0076] A groove is provided on one side of the slag removal shell 204. The groove provides a guide for the sliding sealing plate 214 and restricts its movement trajectory. The sliding sealing plate 214 is installed inside the groove and is used to close or open the cleaning outlet 203. The top of the sliding sealing plate 214 contacts the switching plate 205, allowing it to move synchronously with the position change of the switching plate 205. Two sets of mounting cylinders 215 are provided at the bottom of the cleaning outlet 203. The mounting cylinders 215 are used to accommodate and fix the sealing spring 227, providing mounting support for the sealing spring 227. The sealing spring 227 is installed inside the mounting cylinder 215. 27. The top of the closing spring 227 is connected to the sliding closing plate 214. The closing spring 227 provides an upward elastic force to the sliding closing plate 214, so that the sliding closing plate 214 remains in an upward state when no external force is applied. A first mounting base 216 is provided on one side of the mixing shell 102. A cleaning motor 217 is provided on one side of the first mounting base 216 for driving the switching plate 205 and the centrifugal permeation membrane 201 to move between the filtration position and the cleaning position. The cleaning motor 217 provides power for the rotation of the switching plate 205. The main shaft of the cleaning motor 217 is connected to one side of the switching plate 205. Slots are provided on both sides of the inner wall of the mixing shell 102. 218, the slot 218 is used to cooperate with the inclined block 221 to position the switching plate 205 in the filter position. On both sides of the switching plate 205, corresponding to the slot 218, there are mounting grooves 219. A spring 220 is installed in the mounting groove 219 and connected to the inclined block 221. The spring 220 provides outward elastic force to the inclined block 221, allowing it to extend out of the mounting groove 219 and engage in the slot 218. The inclined block 221 and the mounting groove 219 are slidably connected. The centrifugal motor 202 is installed on the top of the mixing tank 206. The centrifugal motor 202 provides power for the rotation of the centrifugal permeation membrane 201. The main shaft is connected to a drive shaft 222, which is used to transmit power to the centrifugal motor 202. A first connecting seat 223 is provided at the bottom of the drive shaft 222. A through hole is provided at the bottom of the centrifugal permeation membrane 201. A second connecting seat 224 is provided at the top of the rotating ring frame 211. The first connecting seat 223 is used to cooperate with the second connecting seat 224 to realize the transmission and separation of power. The through hole is used for the drive shaft 222 to pass through, so that the first connecting seat 223 can be docked with the second connecting seat 224. The second connecting seat 224 is used to receive the power transmitted by the first connecting seat 223, driving the rotating ring frame 211 and the centrifugal permeation membrane 201 to rotate.The top of the sedimentation shell 101 is provided with a through groove 107, which is used to allow the mixed liquid filtered in the mixing shell 102 to flow into the sedimentation shell 101. A first guide plate 225 is provided in the mixing shell 102 corresponding to the through groove 107. The first guide plate 225 is used to guide the mixed liquid to flow towards the through groove 107. A second guide plate 226 is provided at the bottom of the through groove 107. The second guide plate 226 is used to guide the mixed liquid flowing out of the through groove 107 to smoothly enter the sedimentation shell 101 and avoid liquid splashing.

[0077] In this embodiment, when the switching plate 205 is in the filtration position, the inclined locking block 221 extends out of the mounting groove 219 and passes through the locking groove 218 under the elastic force of the spring 220, thus fixing the switching plate 205 in the filtration position. The first connecting seat 223 and the second connecting seat 224 are connected, so that the power of the centrifugal motor 202 can be transmitted to the rotating ring frame 211 through the transmission shaft 222. The centrifugal motor 202 drives the rotating ring frame 211 and the centrifugal permeation membrane 201 to rotate, stirring and mixing the laboratory wastewater and chemical reagents in the mixing tank 206, and simultaneously completing the filtration of the mixed liquid. The sliding sealing plate 214 rises to the highest position under the elastic force of the sealing spring 227, sealing the cleaning outlet 203 to prevent the mixed liquid filtered by the centrifugal permeation membrane 201 from entering the sludge cleaning shell 204, so that the filtered mixed liquid can flow along the first guide plate 225. The second guide plate 226 enters the sedimentation shell 101 through the through groove 107 for subsequent sedimentation treatment; when the switching plate 205 is in the cleaning position, the cleaning motor 217 drives the switching plate 205 to rotate, the inclined block 221 is squeezed by the inner wall of the mixing shell 102, the spring 220 is compressed and retracted into the mounting groove 219, no longer passing through the slot 218, the first connecting seat 223 and the second connecting seat 224 are separated, the power of the centrifugal motor 202 cannot be transmitted to the centrifugal permeation membrane 201, during the rotation of the switching plate 205, the sliding sealing plate 214 is pressed down, the sealing spring 227 is compressed and the sliding sealing plate 214 is lowered, the cleaning outlet 203 is not closed, so that the slag cleaning shell 204 is connected to the mixing shell 102, and the mixed liquid in the mixing tank 206 can push the impurities on the top of the centrifugal permeation membrane 201 through the cleaning outlet 203 into the slag cleaning shell 204.

[0078] Sliding tracks 303 are provided on both sides of the inner wall of the sedimentation shell 101. Sliding blocks 304 are slidably provided on adjacent sides of the two sets of sliding tracks 303. The sliding blocks 304 can reciprocate along the length of the sliding tracks 303. A first connecting rod 305 is provided on adjacent sides of the two sets of sliding blocks 304, connecting to the floc collection box 301. The first connecting rod 305 transmits the movement of the sliding blocks 304 to the floc collection box 301. Adjacent sides of the two sets of floc collection boxes 301 are connected by two sets of second connecting rods 306, which ensure synchronous movement of the two sets of floc collection boxes 301. A linear module 307 is provided on one side of the inner wall of the sedimentation shell 101. A drive floc collector is provided on one side of the linear module 307. The overflow motor 308 moves the collection box 301 between the collection position and the overflow position. The slider of the linear module 307 is connected to one of the floating lint collection boxes 301 through the third connecting rod 309, so that the slider of the linear module 307 can drive the floating lint collection box 301 to move along the sliding track 303. The floating lint collection assembly also includes a toggle slide rail 310. An installation plate 311 is provided on one side of the inner wall of the sedimentation shell 101, and a toggle slide rail 310 is provided on one side of the installation plate 311. The toggle slide rail 310 is used to provide a moving trajectory for the toggle linkage 313. The tops of the two overflow plates 302 are connected to the toggle linkage 313. One end of the toggle linkage 313 is slidably connected to the toggle slide rail 310 to move the overflow plates 302 between the collection position and the overflow position.

[0079] In this embodiment, when the fluff collection box 301 moves along the sliding track 303, the actuating rod 313 moves synchronously with the fluff collection box 301 and slides along the trajectory of the actuating slide rail 310, causing the overflow plate 302 to slide up and down along the inner wall of the fluff collection box 301. When the fluff collection box 301 moves to the collection position, the actuating rod 313 is located in the lower section of the actuating slide rail 310, causing the overflow plate 302 to descend into the fluff collection box 301. When the fluff collection box 301 moves to the overflow position, the actuating rod 313 is located in the higher section of the actuating slide rail 310, causing the overflow plate 302 to rise to the top of the fluff collection box 301.

[0080] An output box 108 is located on the side of the sedimentation shell 101 away from the transfer box 105. A first output pipe 109 is located at the bottom of the output box 108, connecting to a subsequent processing device. The first output pipe 109 is used to transport the supernatant in the output box 108 to the subsequent processing stage for further purification. Two sets of second through holes are correspondingly opened on the side of the transfer box 105 adjacent to the sedimentation shell 101. Two sets of third through holes are correspondingly opened on the side of the output box 108 adjacent to the sedimentation shell 101. A through pipe 316 is installed in each of the two sets of second and third through holes. The through pipe 316 connects the floc collection box 301 to the transfer box 105 or the output box 108. The through pipe 316 is located away from the floc collection box 301. One end of 01 is provided with a first solenoid valve 317, which is used to control the opening and closing of the insertion tube 316. Both ends of the fluff collection box 301 are provided with insertion holes 318 corresponding to the insertion tube 316. The insertion holes 318 are used for the insertion tube 316 to be inserted into the fluff collection box 301. Both sides of the inner wall of the fluff collection box 301 are provided with rotating seats 319. The rotating seats 319 are rotatably connected to the sealing plate 321 through a flip-top spring 320 and a rotating shaft 212. The flip-top spring 320 is used to provide a reset spring force for the sealing plate 321, so that the sealing plate 321 remains closed to the insertion hole 318 when there is no external force. The rotating shaft 212 is used to realize the rotation of the sealing plate 321 around the rotating seat 319.

[0081] In this embodiment, when the floc collection box 301 is in the collection position, the distance between the floc collection box 301 and the transfer box 105 is less than the distance between the floc collection box 301 and the output box 108. Two sets of insertion tubes 316 on one side of the transfer box 105 are inserted into two sets of insertion holes 318 on the side of the floc collection box 301 closest to the transfer box 105. During insertion, the insertion tubes 316 push the corresponding sealing plate 321 to rotate around the rotating shaft 212, compressing the flip-top spring 320 to open the insertion holes 318. The sealing plate 321 then closes the other two sets of insertion holes 318. At this time, the first solenoid valve 317 on the side of the transfer box 105 is opened, and the first solenoid valve 317 on the side of the output box 108 is closed, allowing the suspended flocs collected by the floc collection box 301 to enter the transfer box 105 for temporary storage through the insertion tubes 316. When the floc collection box 301 is in the overflow position, the distance between the floc collection box 301 and the transfer box 105... The distance between them is greater than the distance between the fluff collection box 301 and the output box 108. Two sets of insertion tubes 316 on one side of the output box 108 are inserted into two sets of insertion holes 318 on the side of the fluff collection box 301 near the output box 108. During the insertion process, the insertion tubes 316 push the corresponding side sealing plate 321 to rotate around the rotating shaft 212, compressing the flip-top spring 320 to open the insertion holes 318. The insertion tubes 316 on the side of the transfer box 105 are pulled out from the fluff collection box 301. The corresponding side sealing plate 321 is reset under the elastic force of the flip-top spring 320, closing the other two sets of insertion holes 318. At this time, the first solenoid valve 317 on the side of the output box 108 is opened and the first solenoid valve 317 on the side of the transfer box 105 is closed, so that the mixed liquid after sedimentation collected by the fluff collection box 301 enters the interior of the output box 108 through the insertion tubes 316, and is then transported to the subsequent processing device through the first output pipe 109.

[0082] A second mounting base 322 is provided on one side of the inner wall of the sedimentation shell 101. The bottom of the second mounting base 322 is connected to the mounting base 324 via two sets of guide rods 323. The mounting base 324 is used to fix the bottom ends of the two sets of guide rods 323. A lifting screw 325 is provided between the second mounting base 322 and the mounting base 324. A lifting motor 326 is provided on the top of the second mounting base 322. The main shaft of the lifting motor 326 is connected to the lifting screw 325. Both sets of guide rods 323 are slidably connected to the sliding seat 327. A threaded sleeve 328 is provided on one side of the sliding seat 327. The threaded sleeve 328 is engaged with the lifting screw 325. When the lifting screw 325 rotates, the threaded sleeve 328 drives the sliding seat 327 to move up and down along the guide rods 323. The bottom of the sliding seat 327 is connected to the detection base 330 via two sets of connecting rods 329. The bottom of the sliding seat 327 and the top of the detection base 330 are respectively provided with a transmittance detector 331 and a transmittance detection receiver 332 for detecting the transmittance of the mixed liquid. The transmittance detector 331 is used to emit detection light, and the transmittance detection receiver 332 is used to receive the detection light after it passes through the mixed liquid. The water surface of the mixed liquid is located between the transmittance detector 331 and the transmittance detection receiver 332. After the detection light passes through the mixed liquid, the transmittance detection receiver 332 generates a corresponding electrical signal according to the intensity of the received light, thereby obtaining the transmittance data of the mixed liquid and judging the sedimentation effect. In use, the lifting motor 326 is started, driving the lifting screw 325 to rotate. This, through the threaded sleeve 328, causes the sliding seat 327 to descend along the guide rod 323, moving the transmittance detector 331 and the transmittance detection receiver 332 to the detection position. At this point, the water surface of the mixed liquid is between them. After the transmittance detection is completed, the lifting motor 326 rotates in the opposite direction, causing the sliding seat 327 to rise back to its initial position, preventing the detection components from being corroded by prolonged immersion in the mixed liquid. A second solenoid valve 333 is installed at the bottom of the sedimentation shell 101 and connected to the filter shell 103. The second solenoid valve 333 is used to control the opening and closing of the channel between the bottom of the sedimentation shell 101 and the filter shell 103. After sedimentation is completed, the second solenoid valve 333 is opened to allow the impurities to enter the filter shell 103 through the second solenoid valve 333 for subsequent squeezing and filtration. The sedimentation shell 101 can optionally be equipped with a sediment scraping mechanism. The sediment scraping mechanism is a prior art and therefore will not be described or shown in this invention. The sediment scraping mechanism can be used to push the sediment accumulated at the bottom of the sedimentation shell 101 toward the inlet of the second solenoid valve 333 to assist in the discharge of the sediment and prevent the sediment from accumulating and hardening at the bottom for a long time.

[0083] The extrusion filtration assembly includes two sets of partition plates 401. The filter housing 103 is divided into a receiving chamber 402 and an extrusion chamber 403 by the two sets of partition plates 401. The receiving chamber 402 is used to temporarily store solid materials from different processing units. The extrusion chamber 403 provides a sealed working space for the extrusion filtration of solid materials. The top of the receiving chamber 402 is connected to a connecting pipe 106 to receive filter residue and suspended flocculation temporarily stored in the transfer box 105. One side of the receiving chamber 402 is connected to a second solenoid valve 333 to receive sediment discharged from the bottom of the sedimentation housing 101. The two sets of partition plates 401... The top of each filter housing 103 is provided with a guide slope 413, which is inclined toward the gap between the two sets of partition plates 401 to guide the material in the receiving chamber 402 to flow toward the gap and prevent the material from accumulating on the top of the partition plates 401. Two sets of sliding grooves are provided on both sides of the inner wall of the filter housing 103. One set of partition plates 401 is slidably connected to the two sets of sliding grooves by moving blocks 404 on both sides, so that the partition plate 401 can reciprocate along the length of the sliding groove. A moving cylinder 405 is provided on one side of the filter housing 103. One end of the moving cylinder 405 is connected to one set of partition plates 401 to drive it to move between the receiving position and the squeezing position.

[0084] In this embodiment, when the partition plate 401 is in the receiving position, the adjacent sides of the two sets of partition plates 401 are in close contact, so that the receiving chamber 402 and the extrusion chamber 403 are completely separated. At this time, the receiving chamber 402 can independently receive materials from the connecting pipe 106 and the second solenoid valve 333 without entering the extrusion chamber 403, ensuring that the extrusion chamber 403 can extrude the previous batch of materials, realizing the parallel operation of material receiving and extrusion. When the partition plate 401 is in the extrusion position, the moving cylinder 405 extends and pushes the movable partition plate 401 to move away from the fixed partition plate along the slide groove. The adjacent sides of the two sets of partition plates 401 do not contact, forming a gap, so that impurities, flocs and sediments in the receiving chamber 402 enter the extrusion chamber 403 through the gap under the action of gravity along the guide slope 413. After all the materials have entered the extrusion chamber 403, the moving cylinder 405 retracts and drives the partition plate 401 to reset to the receiving position, reseparating the receiving chamber 402 and the extrusion chamber 403, providing a sealed space for subsequent extrusion filtration operations.

[0085] The extrusion filter assembly includes an extrusion plate 406 located at a receiving or extrusion position. The extrusion plate 406 is disposed within an extrusion chamber 403. The extrusion plate 406 applies pressure to impurities, flocculation, and sediment within the extrusion chamber 403 to achieve solid-liquid separation. An extrusion filter channel 407 is formed at the top of the extrusion plate 406, providing an outlet channel for the filtrate generated during the extrusion process. An extrusion permeation membrane 408 is disposed within the extrusion filter channel 407, intercepting solid materials while allowing liquid to pass through. An extrusion cylinder 409 and a second output pipe 410 are disposed at the bottom of the filter housing 103. One end of pipe 410 is connected to a subsequent processing device to transport the filtrate generated by extrusion to the subsequent processing stage. The top end of extrusion cylinder 409 is connected to extrusion plate 406 to drive extrusion plate 406 to move between receiving position and extrusion position. A push-out cylinder 415 is provided on one side of filter housing 103. A slot is opened on one side of extrusion chamber 403, and a push-out plate 414 is provided in the slot. The push-out plate 414 is used to push the extruded dry residue to move. One end of push-out cylinder 415 is connected to push-out plate 414. An impurity discharge pipe 411 is provided on the other side of filter housing 103. The impurity discharge pipe 411 is used to discharge the extruded dry residue outside the device.

[0086] In this embodiment, when the extrusion plate 406 is in the receiving position, the bottom of the extrusion plate 406 is in close contact with the bottom surface of the extrusion chamber 403, so that the second output pipe 410 is not connected to the extrusion chamber 403. At this time, the material in the receiving chamber 402 can enter the extrusion chamber 403 through the gap between the two sets of partition plates 401, and will not leak from the second output pipe 410. When all the material has entered the extrusion chamber 403 and the two sets of partition plates 401 have returned to the receiving position, the extrusion cylinder 409 extends to drive the extrusion plate 406 to rise from the receiving position to the extrusion position. During the rising process, the extrusion plate 406 applies pressure to the material in the extrusion chamber 403. The water in the material is squeezed out and enters the extrusion filter channel 407 through the extrusion permeation membrane 408, and then flows into the bottom of the extrusion chamber 403. When the extrusion plate 406 is in the receiving position, the material in the receiving position enters the extrusion chamber 403 through the extrusion permeation membrane 408, and then flows into the bottom of the extrusion chamber 403. When position 06 is in the extrusion position, the bottom of the extrusion plate 406 does not contact the bottom surface of the extrusion chamber 403, so that the second output pipe 410 is connected to the extrusion chamber 403. The filtrate generated by extrusion is transported to the subsequent processing device through the second output pipe 410. An impurity discharge channel 412 is formed between the top of the extrusion plate 406 and the two sets of partition plates 401. The push cylinder 415 extends and pushes the push plate 414 to move along the impurity discharge channel 412, pushing the extruded dry residue in the impurity discharge channel 412 into the impurity discharge pipe 411. The dry residue is discharged outside the device through the impurity discharge pipe 411. After the solid-liquid separation and dry residue discharge are completed, the push cylinder 415 retracts and drives the push plate 414 to reset. The extrusion cylinder 409 retracts and drives the extrusion plate 406 to reset to the receiving position, ready to receive the next batch of materials.

[0087] Please see as follows Figure 23As shown, the present invention also provides a method for treating purified laboratory wastewater discharge, applied to the aforementioned purified laboratory wastewater discharge treatment device, comprising the following steps:

[0088] S1: Laboratory wastewater and chemical reagents are input into mixing tank 206. Centrifugal motor 202 drives centrifugal permeation membrane 201 to rotate for stirring and filtration.

[0089] Specifically, laboratory wastewater is introduced into the mixing tank 206 through the laboratory wastewater inlet pipe 207, and corresponding chemical reagents are introduced into the mixing tank 206 through the chemical reagent inlet pipe 208. The centrifugal motor 202 is started, and the first connecting seat 223, the second connecting seat 224, the rotating ring frame 211 and the centrifugal permeation membrane 201 are driven to rotate through the transmission shaft 222. The laboratory wastewater and chemical reagents in the mixing tank 206 are stirred and mixed. Impurities generated during the mixing process are left on the top of the centrifugal permeation membrane 201. After being filtered through the centrifugal permeation membrane 201, the mixed liquid flows through the first guide plate 225 and the second guide plate 226 into the sedimentation shell 101.

[0090] S2: When impurities accumulate on the top of the centrifugal permeation membrane 201 for a preset time, the cleaning motor 217 is started to drive the switching plate 205 and the centrifugal permeation membrane 201 to the cleaning position and open the cleaning outlet 203. The impurities enter the transfer box 105 through the cleaning outlet 203 and then reset.

[0091] Specifically, after impurities accumulate on the top of the centrifugal permeation membrane 201 for a preset time, the cleaning motor 217 is started to drive the switching plate 205 and the centrifugal permeation membrane 201 to move from the filtration position to the cleaning position. One end of the switching plate 205 presses down the sliding sealing plate 214 to open the cleaning outlet 203. The cleaning shell 204 is connected to the mixing shell 102. The mixed liquid churning in the mixing tank 206 pushes the impurities on the top of the centrifugal permeation membrane 201 through the cleaning outlet 203, the cleaning shell 204 and the filter cake tube 104 into the transfer box 105. After cleaning is completed, the cleaning motor 217 is started to drive the switching plate 205 and the centrifugal permeation membrane 201 back to the filtration position. The sliding sealing plate 214 is reset and closes the cleaning outlet 203 under the action of the sealing spring 227.

[0092] S3: The transmittance of the mixed liquid is obtained based on the transmittance detector 331 and the transmittance detection receiver 332. When the transmittance is lower than the preset threshold, the floc collection box 301 moves to the collection position to guide the suspended flocs on the water surface into the transfer box 105. When the transmittance is higher than the preset threshold, the floc collection box 301 moves to the overflow position. The overflow plate 302 intercepts the suspended flocs on the water surface. The supernatant enters the floc collection box 301 through the gap of the overflow plate 302 and is discharged to the subsequent treatment device.

[0093] Specifically, the mixed liquid flowing into the sedimentation shell 101 is allowed to settle, forming bottom sediment and surface flocculation. The lifting motor 326 is activated to drive the lifting screw 325 to rotate, moving the sliding seat 327, the transmittance detector 331, and the transmittance detection receiver 332. This positions the surface of the mixed liquid between the transmittance detector 331 and the transmittance detection receiver 332, detecting the transmittance of the mixed liquid. When the transmittance of the mixed liquid is detected to be lower than a preset threshold, the overflow motor 308 is activated to move the floc collection box 301 to the collection position. The insertion pipe 316 on one side of the transfer box 105 passes through the insertion hole 318 on the corresponding side of the floc collection box 301 and enters the interior of the floc collection box 301. The top surface of the floc collection box 301 is flush with the surface of the mixed liquid, collecting the water. The suspended flocculation on the surface is collected and flows into the transfer box 105 through the through-pipe 316. When the light transmittance of the mixed liquid is detected to be higher than the preset threshold, the overflow motor 308 is started to drive the floc collection box 301 to move to the overflow position. The through-pipe 316 on one side of the output box 108 passes through the through-hole 318 on the corresponding side of the floc collection box 301 and enters the interior of the floc collection box 301. The actuating linkage 313 slides along the actuating slide rail 310 to drive the overflow plate 302 to rise to the top of the floc collection box 301. The top surface of the overflow plate 302 is flush with the water surface of the mixed liquid, intercepting the suspended flocculation on the water surface. The supernatant after sedimentation enters the floc collection box 301 through the gap between the overflow plate 302 and the floc collection box 301, and then flows into the output box 108 through the through-pipe 316 to be transported to the subsequent treatment device.

[0094] S4: The sediment at the bottom of the sedimentation shell 101 and the impurities and suspended flocculation in the transfer box 105 flow into the filter shell 103. The extrusion cylinder 409 is activated to drive the extrusion plate 406 to move upward to the extrusion position. The filtrate filtered by the extrusion permeation membrane 408 is transported to the subsequent treatment device. The ejection plate 414 pushes the extruded dry residue out from the impurity discharge pipe 411.

[0095] Specifically, after sedimentation is complete, the second solenoid valve 333 at the bottom of the sedimentation shell 101 is opened, allowing the sediment at the bottom of the sedimentation shell 101 to flow into the receiving chamber 402 of the filter shell 103 through the second solenoid valve 333. Impurities and suspended flocculation in the transfer box 105 also flow into the receiving chamber 402 through the connecting pipe 106. The moving cylinder 405 is activated to drive the movable partition plate 401 from the receiving position to the squeezing position, connecting the receiving chamber 402 and the squeezing chamber 403. Impurities, suspended flocculation, and sediment in the receiving chamber 402 flow into the squeezing chamber 403 through the gap between the two sets of partition plates 401. The moving cylinder 405 is then activated to drive the partition plate 401 to reset. Upon reaching the receiving position, the receiving chamber 402 is separated from the extrusion chamber 403. The extrusion cylinder 409 is activated to drive the extrusion plate 406 to rise from the receiving position to the extrusion position. The material in the extrusion chamber 403 is extruded and filtered through the extrusion permeation membrane 408. The filtrate generated by the extrusion flows into the bottom of the extrusion chamber 403 through the extrusion filtration channel 407 and is transported to the subsequent processing device through the second output pipe 410. After the extrusion is completed, the extrusion plate 406 remains in the extrusion position, forming an impurity discharge channel 412 between itself and the two sets of partition plates 401. The ejection cylinder 415 is activated to drive the ejection plate 414 to move along the impurity discharge channel 412, pushing the extruded dry residue out of the impurity discharge pipe 411.

[0096] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A device for purifying and treating laboratory wastewater discharge, characterized in that, include: Purify the outer casing; The purification shell includes a sedimentation shell, a mixing shell on top of the sedimentation shell, a filter shell on one side of the sedimentation shell, and a filter cake pipe connected to the filter shell on one side of the mixing shell. The centrifugal separation component is installed inside the mixing shell. It includes a centrifugal permeation membrane and a centrifugal motor for agitating and mixing laboratory wastewater and chemical reagents. When the centrifugal permeation membrane is in the filtration position, it is horizontally distributed, and the mixture of laboratory wastewater and chemical reagents enters the sedimentation shell through the membrane, while impurities in the mixture remain on the top of the membrane. When the centrifugal permeation membrane is in the cleaning position, it is obliquely distributed, and the agitated mixture pushes impurities through the filter cake tube into the filtration shell. A flocculent collection assembly is installed inside the sedimentation shell. The assembly includes a flocculent collection box located at a collection position and an overflow position. An overflow plate is slidably disposed inside the flocculent collection box. When the flocculent collection box is in the collection position, the overflow plate is located inside the box, and the top surface of the box is flush with the water surface of the mixed liquid in the sedimentation shell to collect suspended flocculents. When the box is in the overflow position, the overflow plate is located on top of the box, and flush with the water surface of the mixed liquid in the sedimentation shell to intercept suspended flocculents. The squeeze filter assembly is installed inside the filter housing and is used to squeeze and filter impurities, flocculation, and sediment.

2. The laboratory wastewater treatment device according to claim 1, characterized in that: A transfer box is provided on one side of the sedimentation shell, a cleaning outlet is provided on one side of the mixing shell, a slag cleaning shell is provided on one side of the cleaning outlet, and the slag cleaning shell is connected to the transfer box through a slag filter pipe. A connecting pipe is provided at the bottom of the transfer box and connected to the filter shell. The centrifugal separation assembly also includes a switching plate located at the filtration or cleaning position. A mixing tank is provided on the top of the mixing shell. The top of the mixing tank is provided with a laboratory wastewater inlet pipe and a chemical reagent inlet pipe. A filter port is provided at the bottom of the mixing tank. The switching plate is rotatably installed inside the mixing shell. The centrifugal permeation membrane is annular and is installed on a rotating ring frame. The top of the switching plate is rotatably connected to the rotating ring frame through a rotating shaft. A filter outlet is provided at the top of the switching plate corresponding to the centrifugal permeation membrane. When the switching plate is in the filtration position, the bottom of the mixing tank is in contact with the top of the switching plate, and the centrifugal permeation membrane is located inside the filter port to filter the mixed liquid in the mixing tank; When the switching plate is in the cleaning position, both the switching plate and the centrifugal permeation membrane are located below the mixing tank. One side of the switching plate is in contact with the cleaning outlet, and the mixed liquid pushes the impurities through the cleaning shell and filter pipe into the transfer box.

3. The laboratory wastewater treatment device according to claim 2, characterized in that: A sludge cleaning shell is provided on one side with a sliding groove, and a sliding sealing plate is provided in the sludge cleaning shell. The top of the sliding sealing plate contacts the switching plate. Two sets of mounting cylinders are provided at the bottom of the cleaning outlet. A sealing spring is provided in the mounting cylinder. The top of the sealing spring is connected to the sliding sealing plate. A first mounting seat is provided on one side of the mixing shell. A cleaning motor is provided on one side of the first mounting seat for driving the switching plate and the centrifugal permeation membrane to move between the filtration position and the cleaning position. The main shaft of the cleaning motor is connected to one side of the switching plate. Both sides of the inner wall of the hybrid shell are provided with slots, and the corresponding slots on both sides of the switching plate are provided with mounting slots. A spring is provided in the mounting slot and connected to the inclined block. The inclined block is slidably connected to the mounting slot. The centrifugal motor is installed on the top of the mixing tank. The main shaft of the centrifugal motor is connected to a drive shaft. A first connecting seat is provided at the bottom of the drive shaft. A through hole is opened at the bottom of the centrifugal permeation membrane. A second connecting seat is provided at the top of the rotating ring frame. The top of the sedimentation shell is provided with a through groove, the mixing shell is provided with a first guide plate corresponding to the through groove, and the bottom of the through groove is provided with a second guide plate.

4. The laboratory wastewater treatment device according to claim 3, characterized in that: When the switching plate is in the filtration position, the inclined card block is inserted into the card slot, the first connecting seat is connected to the second connecting seat, the centrifugal motor drives the rotating ring frame and the centrifugal permeation membrane to rotate and mix the laboratory wastewater and chemical reagents in the mixing tank, and the sliding sealing plate seals the cleaning outlet to prevent the mixed liquid after passing through the centrifugal permeation membrane from entering the sludge cleaning shell, so that the filtered mixed liquid can enter the sedimentation shell along the first guide plate and the second guide plate; When the switching plate is in the cleaning position, the inclined card block is not inserted into the slot, the first connecting seat and the second connecting seat are not connected, and the sliding sealing plate does not close the cleaning outlet, so that the slag cleaning shell and the mixing shell are connected.

5. The laboratory wastewater treatment device according to claim 2, characterized in that: Sliding tracks are provided on both sides of the inner wall of the sedimentation shell. Sliding blocks are slidably provided on the adjacent side of the two sets of sliding tracks. The adjacent side of the two sets of sliding blocks is connected to the floc collection box through the first connecting rod. The adjacent side of the two sets of floc collection boxes is connected through the two sets of second connecting rods. A linear module is provided on one side of the inner wall of the sedimentation shell. An overflow motor is provided on one side of the linear module to drive the floc collection box to move between the collection position and the overflow position. The slider of the linear module is connected to one of the floc collection boxes through the third connecting rod. The floc collection assembly also includes a sliding rail. A mounting plate is provided on one side of the inner wall of the sedimentation shell, and a sliding rail is provided on one side of the mounting plate. The tops of the two overflow plates are connected to a sliding rod. One end of the sliding rod is slidably connected to the sliding rail to move the overflow plates between the collection position and the overflow position.

6. The laboratory wastewater treatment device according to claim 5, characterized in that: An output box is located on the side of the sedimentation shell away from the transfer box. A first output pipe is located at the bottom of the output box and connects to the subsequent processing device. Two sets of second through holes are opened on the side of the transfer box adjacent to the sedimentation shell. Two sets of third through holes are opened on the side of the output box adjacent to the sedimentation shell. Insertion pipes are installed in the two sets of second through holes and the two sets of third through holes. A first solenoid valve is installed at the end of the insertion pipe away from the fluff collection box. Insertion holes are opened at both ends of the fluff collection box corresponding to the insertion pipes. Rotating seats are installed on both sides of the inner wall of the fluff collection box. The rotating seats are rotatably connected to the sealing plate through a flip-top spring and a rotating shaft. When the floc collection box is in the collection position, the distance between the floc collection box and the transfer box is less than the distance between the floc collection box and the output box. Two sets of through pipes on one side of the transfer box are inserted into two sets of through holes on the side of the floc collection box near the transfer box. The sealing plate seals the other two sets of through holes, so that the suspended flocs collected by the floc collection box enter the transfer box through the through pipes. When the flocculation collection box is in the overflow position, the distance between the flocculation collection box and the transfer box is greater than the distance between the flocculation collection box and the output box. Two sets of through pipes on one side of the output box are inserted into two sets of through holes on the side of the flocculation collection box near the output box. The sealing plate seals the other two sets of through holes, so that the mixed liquid after sedimentation collected by the flocculation collection box enters the output box through the through pipes.

7. The laboratory wastewater treatment device according to claim 5, characterized in that: A second mounting base is provided on one side of the inner wall of the sedimentation shell. The bottom of the second mounting base is connected to the mounting base via two sets of guide rods. A lifting screw is provided between the second mounting base and the mounting base. A lifting motor is connected to the top of the second mounting base. The main shaft of the lifting motor is connected to the lifting screw. Both sets of guide rods are slidably connected to a sliding seat. A threaded sleeve is provided on one side of the sliding seat and is connected to the lifting screw. The bottom of the sliding seat is connected to the detection base via two sets of connecting rods. A transmittance detector and a transmittance receiver for detecting the transmittance of the mixed liquid are correspondingly provided at the bottom of the sliding seat and the top of the detection base. The water surface of the mixed liquid is located between the transmittance detector and the transmittance receiver. A second solenoid valve is provided at the bottom of the sedimentation shell and connected to the filter shell. The second solenoid valve is used to allow impurities to settle and enter the filter shell through the second solenoid valve.

8. The laboratory wastewater treatment device according to claim 7, characterized in that: The extrusion filter assembly includes two sets of partition plates. The filter housing is divided into a receiving chamber and an extrusion chamber by the two sets of partition plates. The top of the receiving chamber is connected to a connecting pipe, and one side of the receiving chamber is connected to a second solenoid valve. The top of both sets of partition plates is provided with a guide slope. The inner wall of the filter housing is provided with two sets of sliding grooves on both sides. One set of partition plates is slidably connected to the two sets of sliding grooves by two moving blocks on both sides. A moving cylinder is provided on one side of the filter housing. One end of the moving cylinder is connected to one set of partition plates to drive it to move between the receiving position and the extrusion position. When the separator is in the receiving position, the adjacent sides of the two sets of separators are in contact, thus separating the receiving chamber from the extrusion chamber. When the separator plates are in the squeezing position, the adjacent sides of the two sets of separator plates do not contact each other, forming a gap, which allows impurities, floating lint and sediment in the receiving cavity to enter the squeezing cavity through the gap.

9. The laboratory wastewater treatment device according to claim 8, characterized in that: The extrusion filter assembly includes an extrusion plate located at the receiving position or the extrusion position, an extrusion plate disposed in the extrusion chamber, an extrusion filter channel opened at the top of the extrusion plate, an extrusion permeation membrane disposed in the extrusion filter channel, an extrusion cylinder and a second output pipe disposed at the bottom of the filter housing, one end of the second output pipe being connected to a subsequent processing device, the top of the extrusion cylinder being connected to the extrusion plate for driving the extrusion plate to move between the receiving position and the extrusion position, an ejection cylinder disposed on one side of the filter housing, a slot opened on one side of the extrusion chamber, an ejection plate disposed in the slot, one end of the ejection cylinder being connected to the ejection plate, and an impurity discharge pipe disposed on the other side of the filter housing. When the extrusion plate is in the receiving position, the bottom of the extrusion plate contacts the bottom surface of the extrusion chamber, so that the second output tube is not connected to the extrusion chamber; When the extrusion plate is in the extrusion position, the bottom of the extrusion plate does not contact the bottom surface of the extrusion chamber, so that the second output pipe is connected to the extrusion chamber. An impurity discharge channel is formed between the top of the extrusion plate and the two sets of partition plates. The push cylinder pushes the push plate to push the impurities, flocs and sediments in the impurity discharge channel into the impurity discharge pipe.

10. A method for treating purified laboratory wastewater discharge, applied to the purified laboratory wastewater discharge treatment apparatus according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1: Input laboratory wastewater and chemical reagents into the mixing tank. The centrifugal motor drives the centrifugal permeation membrane to rotate for stirring and filtration. S2: When impurities accumulate at the top of the centrifugal permeation membrane for a preset time, the cleaning motor is started to drive the switching plate and the centrifugal permeation membrane to the cleaning position and open the cleaning outlet. The impurities enter the transfer box through the cleaning outlet and then reset. S3: The transmittance of the mixed liquid is obtained based on the transmittance detector and the transmittance detection receiver. When the transmittance is lower than the preset threshold, the floc collection box moves to the collection position to guide the suspended flocs on the water surface into the transfer box. When the transmittance is higher than the preset threshold, the floc collection box moves to the overflow position. The overflow plate intercepts the suspended flocs on the water surface, and the supernatant enters the floc collection box through the gap of the overflow plate and is discharged to the subsequent treatment device. S4: The sediment at the bottom of the sedimentation shell, the impurities in the transfer box and the suspended flocculation flow into the filter shell. The extrusion cylinder is started to drive the extrusion plate to move upward to the extrusion position. The filtrate filtered by the extrusion membrane is transported to the subsequent treatment device. The ejector plate pushes the extruded dry residue out from the impurity discharge pipe.

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