Glycerol wastewater treatment apparatus

Abstract

The present application relates to wastewater treatment technical field, specifically to a kind of glycerol wastewater treatment equipment, comprising: biological pool;Collecting assembly, the collecting assembly includes the lifting disc being arranged in the inside of biological pool, the lifting disc is driven to lift in the inside of biological pool, the outer wall of the lifting disc is fixedly installed with loading box, the upper end surface of the lifting disc is fixedly installed with the first annular magnetic coil being driven to lift in the inside of biological pool, the lower end surface of the first annular magnetic coil is fixedly installed with extension curtain.The present application effectively solves the problem of microorganism anoxia in the process of high-concentration glycerol wastewater treatment by the synergistic effect of aeration assembly and magnetic collection structure, the spiral airflow formed by annular tube and inclined aeration pipe drives glycerol-rich foam to gather in the center of biological pool while improving the efficiency of dissolving oxygen, and the magnetic sealing design of lifting disc and collecting tank realizes the directional extraction of high-concentration glycerol foam.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a glycerol wastewater treatment device. Background Technology

[0002] Oily wastewater usually refers to wastewater generated during the production or use of glycerin. Glycerin is a colorless, odorless, viscous liquid that is widely used in the food, pharmaceutical, cosmetic, and chemical industries.

[0003] There are many types of existing wastewater treatment devices. For example, the construction site wastewater treatment system disclosed in patent CN118878147B is mainly used to treat thin layers of oil floating on the water surface, as these are not easily separated quickly. However, glycerol, as a highly hydrophilic oil, usually mixes with wastewater. When the wastewater contains a high concentration of glycerol, although glycerol may accumulate on the surface, some glycerol will still mix with the wastewater. If an aerobic process is used to treat glycerol wastewater, the excessively high glycerol concentration will cause microorganisms to consume a large amount of oxygen, leading to a rapid decrease in dissolved oxygen in the biological tank, and even local hypoxia. Under these hypoxic conditions, the degradation efficiency of microorganisms will be significantly reduced, and some anaerobic microorganisms may become dominant, thus affecting the wastewater treatment effect. Therefore, without effective treatment of the glycerol in glycerol wastewater, existing aerobic processes for treating high-concentration glycerol wastewater will result in excessively rapid oxygen consumption by microorganisms, leading to local hypoxia and a decrease in degradation efficiency. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a glycerol wastewater treatment device that can effectively solve the problem that glycerol cannot be effectively removed when mixed with wastewater in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides a glycerol wastewater treatment device, comprising:

[0007] Biological pond;

[0008] A collection component includes a lifting plate disposed inside a biological pool. The lifting plate is driven to move up and down inside the biological pool. A loading box is fixedly installed on the outer wall of the lifting plate. A first annular magnetic ring, which is driven to move up and down inside the biological pool, is fixedly installed on the upper end face of the lifting plate. An extension curtain is fixedly installed on the lower end face of the first annular magnetic ring. The lower end of the extension curtain is fixedly connected to the inner bottom end of the loading box.

[0009] The conveying assembly includes a collection tank disposed above the biological pool. A lifting plate is slidably installed inside the collection tank in an airtight manner. A chassis is fixedly installed on the lower end face of the collection tank. Multiple inlet pipes are fixedly installed in a circumferential array inside the chassis. A first one-way valve is fixedly installed on the inner wall of the inlet pipe. A second annular magnetic ring is embedded in the lower end face of the chassis. The second annular magnetic ring and the first annular magnetic ring are magnetically attracted to each other.

[0010] Preferably, a plurality of fixed seats are fixedly installed in a circular array at the inner bottom of the biological pool, an annular pipe is fixedly installed on the inner wall of the fixed seats, a plurality of inclined aeration pipes are connected to the outer wall of the annular pipe in a circular array, and an aeration device is connected to the annular pipe.

[0011] A main shaft is rotatably mounted at the bottom of the biological tank. The upper end of the main shaft passes through the chassis and is rotatably connected to the inner top of the collection tank. A first threaded groove is formed on the outer wall of the main shaft inside the biological tank, and a second threaded groove is formed on the outer wall of the main shaft inside the collection tank. A lifting plate is slidably connected to the outer wall of the main shaft. A water seal is fixedly installed on the lower end face of the lifting plate on the outer wall of the main shaft. A first electromagnetic clutch is fixedly installed at the upper end of the main shaft on the outer wall of the main shaft. The first electromagnetic clutch is threadedly connected to the first threaded groove and electrically connected to a controller. Multiple first brackets are rotatably mounted in a circumferential array on the outer wall of the first electromagnetic clutch. The end of the first bracket away from the axis of the main shaft is fixedly connected to a first annular magnetic ring.

[0012] Preferably, the lower end face of the chassis has a slot, the upper end face of the collection tank is fixedly mounted with a rotary drive component, the rotary drive component is electrically connected to the controller, the output end of the rotary drive component passes through the collection tank and is fixedly connected to the main shaft, the inner wall of the lifting plate is rotatably mounted with a second electromagnetic clutch, the second electromagnetic clutch is threadedly connected to a second threaded groove, the outer wall of the biological pool is fixedly mounted with a plurality of second supports in a circumferential array, the second supports are fixedly connected to the outer wall of the collection tank, and the upper end face of the collection tank has an air outlet.

[0013] Preferably, the system also includes a filtration and recirculation assembly, which includes a support plate fixed to the outer wall of the biological tank. A flocculation tank is fixedly installed on the upper surface of the support plate. An inlet pipe is connected to the upper surface of the flocculation tank. A third one-way valve is fixedly installed on the inner wall of the inlet pipe. Both ends of the inlet pipe are connected to a collection tank. Two sets of stirring rods are provided inside the flocculation tank. Multiple stirring teeth are arranged in a circumferential array on the inner wall of the flocculation tank above the stirring rods.

[0014] Preferably, a bottom plate is airtightly slidably installed at the inner bottom of the flocculation tank, and a telescopic tube is fixedly installed on the upper surface of the bottom plate. The telescopic tube is slidably connected by three sections of sliding tube, wherein the outer walls of two sections of the sliding tube are fixedly connected to the stirring rod, and the outer wall of the other section of the sliding tube is fixedly connected to the stirring teeth. A top plate is fixedly installed on the upper surface of the telescopic tube.

[0015] Preferably, the outer wall of the flocculation tank has two symmetrically connected external boxes. The inner wall of each external box is airtightly fitted with a sliding plate. The outer wall of the top plate has a sliding groove. The sliding plate is slidably connected to the sliding groove. A float is fixedly installed on the lower end face of the sliding plate. A lifting pipe is fixedly installed on the lower end face of the bottom plate. The outer wall of the lifting pipe has multiple annular grooves arranged in a linear array. A rotary lifting device is fixedly installed on the lower end face of the support plate. The rotary lifting device is electrically connected to the controller. The rotary lifting device has two output ends. The two output ends of the rotary lifting device are respectively fixedly connected to and engaged with the lifting pipe.

[0016] Preferably, the outer wall of the flocculation tank is symmetrically connected to two flow pipes, and an electromagnetic valve is fixedly installed on the inner wall of the flow pipe. The electromagnetic valve is electrically connected to the controller, and the end of the flow pipe away from the flocculation tank is connected to a filter return box.

[0017] Preferably, a partition is fixedly installed on the inner wall of the filter return box at the middle position. A second one-way valve is embedded in the partition. Filter cotton is fixedly installed on the upper surface of the partition. An extrusion plate is airtightly slidably installed on the inner wall of the filter return box below the partition. The partition, the filter return box, and the extrusion plate form a return space. A connecting rod is fixedly installed on one side of the extrusion plate. The connecting rod is fixedly connected to the lower end of the riser pipe. A sealing slide plate is fixedly installed on the outer side of the connecting rod. The sealing slide plate is airtightly slidably connected to the filter return box. A return pipe is connected to the outer wall of the filter return box at the corresponding return space. One end of the return pipe is connected to the biological tank. An electromagnetic one-way valve is fixedly installed on the inner wall of the return pipe. The electromagnetic one-way valve is electrically connected to the controller.

[0018] The technical solution provided by this invention has the following advantages compared with the known prior art:

[0019] First, the synergistic effect of the aeration components and the magnetic collection structure effectively solves the problem of microbial hypoxia in the treatment of high-concentration glycerol wastewater. The spiral airflow formed by the ring pipe and the inclined aeration pipe improves dissolved oxygen efficiency and drives the glycerol-enriched foam to gather towards the center of the biological tank. Combined with the magnetic sealing design of the lifting plate and the collection tank, the high-concentration glycerol foam is directionally extracted. This structure avoids the problem of uneven dissolved oxygen caused by local airflow turbulence in traditional aeration systems. On the other hand, it reduces the glycerol concentration in the biological tank through physical separation, maintaining the aerobic degradation environment for microorganisms.

[0020] Secondly, the designed filtration and return assembly forms a closed-loop treatment system, avoiding secondary pollution from flocculants in glycerol wastewater treatment. The floating block linkage stirring mechanism achieves dynamic mixing of flocculant and wastewater, and the layered stirring structure driven by the telescopic tube ensures sufficient flocculation reaction while breaking down the foam layer, allowing the foam to mix with the wastewater. This prevents the flocculant from failing to act on the glycerol or other oily impurities attached to the foam. The filtration and return box adopts a pressure-driven bidirectional filtration design. After the flocculants are intercepted, the treated water is returned to the biological tank through a squeezing and return mechanism, which not only ensures the continuity of system treatment but also allows for the recovery of glycerol flocculants filtered in the filter cotton. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 This is a cross-sectional view of the components used in this invention.

[0024] Figure 3 This is a cross-sectional view of the lifting plate of the present invention;

[0025] Figure 4 This is a cross-sectional view of the collection tank of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the filter recirculation assembly of the present invention;

[0027] Figure 6 This is a schematic diagram of the internal structure of the flocculation tank of the present invention;

[0028] Figure 7 This is a schematic diagram of the internal structure of the filter return box of the present invention.

[0029] Reference numerals: 1. Biological tank; 2. Collection assembly; 201. Fixing base; 202. Annular pipe; 203. Inclined aeration pipe; 204. Main shaft; 205. Lifting plate; 206. First threaded groove; 207. Second threaded groove; 208. First electromagnetic clutch; 209. Water seal; 210. Loading box; 211. Extension curtain; 212. First support; 213. First annular magnetic ring; 3. Conveying assembly; 301. Second support; 302. Collection tank; 303. Rotary drive component; 304. Lifting plate; 305. Second electromagnetic clutch; 306. Chassis; 307. Second annular magnetic ring; 3 08. Slot; 309. Inlet pipe; 310. First check valve; 4. Filter reflux assembly; 401. Liquid inlet pipe; 402. Support plate; 403. Flocculation tank; 404. External connection box; 405. Lifting pipe; 406. Telescopic pipe; 407. Stirring rod; 408. Stirring teeth; 409. Top plate; 410. Sliding plate; 411. Float; 412. Rotary lifting device; 413. Flow pipe; 414. Filter reflux box; 415. Partition plate; 416. Second check valve; 417. Squeezing plate; 418. Connecting rod; 419. Sealing slide plate; 420. Reflux pipe; 421. Filter cotton. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] The present invention will be further described below with reference to embodiments.

[0032] Example: Refer to Figures 1 to 7 A glycerol wastewater treatment device, comprising:

[0033] Biological tank 1, which contains aerobic organisms to treat wastewater;

[0034] Collection component 2 includes a lifting plate 205 disposed inside the biological pool 1. The lifting plate 205 is driven to move up and down inside the biological pool 1. A loading box 210 is fixedly installed on the outer wall of the lifting plate 205. A first annular magnetic ring 213 driven to move up and down inside the biological pool 1 is fixedly installed on the upper end surface of the lifting plate 205. An extension curtain 211 (flexible and stretchable sealing material) is fixedly installed on the lower end surface of the first annular magnetic ring 213. The lower end of the extension curtain 211 is fixedly connected to the inner bottom end of the loading box 210.

[0035] The conveying assembly 3 includes a collection tank 302 positioned above the biological pool 1. A lifting plate 304 is airtightly slidably installed inside the collection tank 302. A chassis 306 is fixedly installed on the lower end face of the collection tank 302. Multiple inlet pipes 309 are fixedly installed in a circumferential array inside the chassis 306. A first one-way valve 310 is fixedly installed on the inner wall of the inlet pipes 309. A second annular magnetic ring 307 is embedded in the lower end face of the chassis 306. The second annular magnetic ring 307 and the first annular magnetic ring 213 are magnetically attracted to each other. The magnetic attraction threshold of the second annular magnetic ring 307 and the first annular magnetic ring 213 is ≥200N to ensure reliable sealing.

[0036] Reference Figures 2 to 3 The inner bottom of the biological tank 1 is fixedly equipped with multiple fixed seats 201 in a circular array. The inner wall of the fixed seat 201 is fixedly equipped with an annular pipe 202. The outer wall of the annular pipe 202 is connected to multiple inclined aeration pipes 203 (inclination angle of 30°-45°) in a circular array. The annular pipe 202 is connected to an aeration device. The aeration device adopts the existing bubble aeration device. This device sends air into the water through the bubble aerator by an air compressor. The air is dispersed in the form of small bubbles, which increases the contact area with water, improves oxygen dissolution efficiency, and increases aerobic biological activity. At the same time, the generated bubbles can make glycerol and other oil impurities contained in the wastewater adhere to the bubbles and float upward to the surface of the wastewater.

[0037] A main shaft 204 is rotatably mounted at the bottom of the biological tank 1. The upper end of the main shaft 204 passes through the chassis 306 and is rotatably connected to the inner top of the collection tank 302. A first threaded groove 206 is formed on the outer wall of the main shaft 204 and inside the biological tank 1. A second threaded groove 207 is formed on the outer wall of the main shaft 204 and inside the collection tank 302. A lifting plate 205 is slidably connected to the outer wall of the main shaft 204. A water seal 209 (a sealing structure to prevent liquid leakage) is fixedly installed on the lower end face of the lifting plate 205 and on the outer wall of the main shaft 204. The water seal 209 can be installed when the lifting plate 205 rises to the first... During the process of threading groove 206, the wastewater and foam above the lifting plate 205 are kept sealed to prevent wastewater and foam from leaking through the first threaded groove 206. A first electromagnetic clutch 208 is fixedly installed on the upper end of the main shaft 204 and on the outer wall of the main shaft 204. The first electromagnetic clutch 208 is threadedly connected to the first threaded groove 206. The first electromagnetic clutch 208 is electrically connected to a controller. Multiple first brackets 212 are rotatably installed in a circumferential array on the outer wall of the first electromagnetic clutch 208. The end of the first bracket 212 away from the axis of the main shaft 204 is fixedly connected to the first annular magnetic ring 213.

[0038] Reference Figure 4The lower end face of the chassis 306 has a slot 308, which is engaged with the first electromagnetic clutch 208. A rotary drive component 303 is fixedly installed on the upper end face of the collection tank 302. The rotary drive component 303 is electrically connected to the controller. The output end of the rotary drive component 303 passes through the collection tank 302 and is fixedly connected to the main shaft 204. A second electromagnetic clutch 305 is rotatably installed on the inner wall of the lifting plate 304. The second electromagnetic clutch 305 is threadedly connected to the second threaded groove 207. Multiple second supports 301 are fixedly installed in a circumferential array on the outer wall of the biological pool 1. The second bracket 301 is fixedly connected to the outer wall of the collection tank 302. The upper end face of the collection tank 302 is provided with an air vent (not shown in the attached figure). The first electromagnetic clutch 208 and the second electromagnetic clutch 305 are mechanical devices that use electromagnetic principles to achieve automatic engagement and disengagement. They are widely used in transmission systems, especially in situations where instantaneous connection and disconnection are required. They are usually composed of an electromagnet and a clutch. When the electromagnet is energized, it generates magnetic force to engage the clutch components together. When the power is off, the clutch disengages, thus connecting and disconnecting the mechanical transmission.

[0039] Reference Figure 6 It also includes a filter return assembly 4, which includes a support plate 402 fixed to the outer wall of the biological tank 1. A flocculation tank 403 is fixedly installed on the upper end face of the support plate 402. The flocculation tank 403 and the inlet pipe 401 can be fixedly assembled by threads. After the inlet pipe 401 is removed, flocculant is placed through the connection. The flocculant is an existing polymer mixture. This type of flocculant is usually used for the treatment of high concentrations of suspended solids or complex liquids. It can combine the rapid reaction characteristics of inorganic flocculants with the high-efficiency flocculation ability of organic polymers. The upper end face of the flocculation tank 403 is connected to the inlet pipe 401. A third check valve is fixedly installed on the inner wall of the liquid pipe 401. Both ends of the liquid inlet pipe 401 are connected to the collection tank 302. The flocculation tank 403 is equipped with two sets of stirring rods 407. Multiple stirring teeth 408 are arranged in a circular array on the inner wall of the flocculation tank 403 above the stirring rods 407. As the stirring teeth 408 rotate with the top plate 409, they eliminate the foam floating on the surface of the wastewater. When the wastewater flows into the flocculation tank 403, a certain amount of foam will be generated due to the impact of the water flow. However, the foam is not eliminated in the flocculation tank 403. Glycerin or other oily impurities attached to the surface of the foam cannot come into contact with the flocculant and flocculate.

[0040] Reference Figure 6The bottom of the flocculation tank 403 is airtightly slidably fitted with a base plate. A telescopic tube 406 is fixedly installed on the upper surface of the base plate. The telescopic tube 406 is slidably connected by three sections of sliding tubes. The telescopic tube 406 can extend and retract inside the flocculation tank 403 by the buoyancy of the float 411. The stirring rod 407 is evenly extended and retracted in the flocculation tank 403 along with the telescopic tube 406 to stir the flocculant and wastewater. The outer walls of two sections of sliding tube are fixedly connected to the stirring rod 407, and the outer wall of the other section of sliding tube is fixedly connected to the stirring teeth 408. A top plate 409 is fixedly installed on the upper surface of the telescopic tube 406.

[0041] Reference Figure 6 The outer wall of the flocculation tank 403 is symmetrically connected to two external boxes 404. The inner wall of the external box 404 is airtightly and slidably installed with a sliding plate 410. The outer wall of the top plate 409 is provided with a sliding groove. The sliding plate 410 is slidably connected to the sliding groove. A float 411 is fixedly installed on the lower end face of the sliding plate 410. A lifting pipe 405 is fixedly installed on the lower end face of the bottom plate. The outer wall of the lifting pipe 405 is linearly arrayed with multiple annular grooves. A rotary lifting device 412 is fixedly installed on the lower end face of the support plate 402. The rotary lifting device 412 consists of a mounting frame, two drive motors, a camshaft, and a gear. The two drive motors drive the camshaft and the gear respectively. The camshaft is slidably connected to the inner wall fiber of the lifting pipe 405. The gear meshes with the annular groove. The rotary lifting device 412 is electrically connected to the controller. The rotary lifting device 412 has two output ends. The two output ends of the rotary lifting device 412 are fixedly connected to and mesh with the lifting pipe 405 respectively.

[0042] Reference Figures 6 to 7Two flow pipes 413 are symmetrically connected to the outer wall of the flocculation tank 403. Solenoid valves are fixedly installed on the inner wall of each flow pipe 413. A solenoid valve is a device that uses electromagnetic force to control the opening and closing of a valve. It is widely used in automated control systems to control the flow of liquids and gases. When current passes through the solenoid coil, an electromagnetic field is generated, attracting the valve core or valve stem, causing the valve to open or close. The solenoid valve is electrically connected to the controller. A filter return box 414 is connected to the end of the flow pipe 413 furthest from the flocculation tank 403. A cover plate is fitted to one side of the filter return box 414 with existing screws. By turning the screws, the cover plate can be removed to take out the filter cotton 421. A partition plate 415 is fixedly installed on the inner wall of the filter return box 414 at the middle position. A second one-way valve 416 is embedded in the partition plate 415. The filter cotton 421 is fixedly installed on the upper surface of the partition plate 415. The filter cotton 421 uses existing activated carbon filter cotton. Activated carbon filter cotton can not only remove organic matter or some specific impurities (such as odors, pigments, etc.) in wastewater, but also filter and flocculate. The subsequent particles, the inner wall of the filter return box 414 and below the partition 415 are airtightly and slidably fitted with a squeezing plate 417. The partition 415, the filter return box 414 and the squeezing plate 417 form a return space. A connecting rod 418 is fixedly installed on one side of the squeezing plate 417. The connecting rod 418 is fixedly connected to the lower end of the riser pipe 405. A sealing slide plate 419 is fixedly installed on the outer side of the connecting rod 418. The sealing slide plate 419 is airtightly and slidably connected to the filter return box 414. The outer wall of the filter return box 414 and the corresponding return A return pipe 420 is connected to the flow space. One end of the return pipe 420 is connected to the biological tank 1. An electromagnetic check valve is fixedly installed on the inner wall of the return pipe 420. The electromagnetic check valve is electrically connected to the controller. The electromagnetic check valve is a device that combines the functions of a solenoid valve and a check valve. It can control the flow direction of the fluid and control the opening and closing of the valve through electromagnetic force. When the filtered wastewater in the return space flows back into the biological tank 1 under the pressure of the squeezing plate 417, it prevents the wastewater in the biological tank 1 from flowing back into the return space.

[0043] The working principle of this invention is as follows:

[0044] Wastewater is discharged into the biological tank 1, so that the lifting plate 205 is submerged in the wastewater and kept at a certain distance from the surface of the wastewater.

[0045] When the aeration device is started, gas enters the interior of the annular pipe 202 and passes through multiple inclined aeration pipes 203 installed on the outer wall of the annular pipe 202. The air sprayed out from the inclined aeration pipes 203 forms flowing bubbles at the inner edge of the biological tank 1. As the bubbles flow towards the wastewater surface, the wastewater will spiral flow inside the biological tank 1. As the bubbles flow upward in the wastewater, glycerol and other oily impurities contained in the wastewater will adhere to the surface of the bubbles (glycerol itself has a certain degree of solubility, and it usually does not float completely on the water surface, but mixes with the water. However, through the aeration process, the bubbles can promote the aggregation of glycerol molecules and increase their buoyancy, especially when the glycerol concentration is high) and float upward to the surface of the wastewater. It should be noted that the aeration efficiency needs to be adjusted appropriately so that the wastewater flows slowly in a spiral inside the biological tank 1, and the glycerol and other oily impurities attached to the bubbles will float on the surface of the wastewater with the bubbles and gather in the middle area of ​​the biological tank 1.

[0046] When bubbles containing glycerin or other oily impurities accumulate on the surface of the wastewater, the rotary drive 303 is activated, driving the main shaft 204 to rotate. The controller controls the voltage input to the first electromagnetic clutch 208, causing the first electromagnetic clutch 208 to engage with the first threaded groove 206. The rotating main shaft 204 drives the first electromagnetic clutch 208 to rise. The rising first electromagnetic clutch 208 drives the first annular magnetic ring 213 to rise via the first bracket 212. The rising first annular magnetic ring 213 stretches the extension curtain 211. The continuously rising first annular magnetic ring 213 magnetically connects with the second annular magnetic ring 307. The stretched extension curtain 211 extends and unfolds between the lifting plate 205 and the chassis 306, gathering the foam containing glycerin and other oily impurities floating on the wastewater surface and in the middle area to the upper surface of the lifting plate 205. At this time, the controller disconnects the voltage input to the first electromagnetic clutch 208 and controls the voltage input to the second electromagnetic clutch 305, so that the second electromagnetic clutch 305 engages with the second threaded groove 207. The rotating main shaft 204 will drive the second electromagnetic clutch 305 and the lifting plate 304 to rise. The rising lifting plate 304 continuously reduces the air pressure between the lower end face and the chassis 306, and the air pressure between the lifting plate 205 and the chassis 306 continuously decreases. As the lifting plate 304 rises continuously, the lifting plate 205 will slide and rise on the outer wall of the main shaft 204 as the air pressure between it and the chassis 306 continuously decreases. When the upper end face of the lifting plate 205 is in contact with the lower end face of the chassis 306, the foam containing glycerin and other oil impurities that accumulates above the lifting plate 205 will enter the collection tank 302 through the inlet pipe 309 and the first one-way valve 310.

[0047] When it is time to collect floating foam again, the controller activates the rotary drive 303, which drives the main shaft 204 to reverse. The controller then controls the voltage input to the first electromagnetic clutch 208 and the second electromagnetic clutch 305 in sequence, so that the first electromagnetic clutch 208 drives the lifting plate 205 to descend to its original position. The first annular magnetic ring 213 engages with the upper surface of the lifting plate 205, and the extension curtain 211 folds back into the loading box 210. The second electromagnetic clutch 305 drives the lifting plate 304 to descend to its original position.

[0048] During the descent of the lifting plate 304, the first one-way valve 310 closes. The foam entering the collection tank 302 is squeezed by the descending lifting plate 304 and enters the flocculation tank 403 through the inlet pipe 401 and the third one-way valve. It should be noted that when collecting the foam above the lifting plate 205, a certain amount of wastewater will also accumulate above the lifting plate 205. This wastewater will flow into the flocculation tank 403 along with the foam. During the continuous collection of foam, the foam and wastewater will accumulate inside the flocculation tank 403. The float 411 will be suspended on the surface of the wastewater according to the accumulated wastewater and foam, and the top plate 409 will be suspended on the surface of the wastewater through the sliding plate 410. The telescopic pipe 406 will be suspended according to the top plate The suspension height of plate 409 extends through sliding motion, causing the stirring rod 407 to extend inside the flocculation tank 403. However, the stirring teeth 408 remain suspended above the wastewater surface, always in contact with the top plate 409. Activating the rotary lifting device 412 drives the lifting pipe 405, bottom plate, and telescopic pipe 406 to rotate. The telescopic pipe 406 then rotates the top plate 409 and the stirring teeth 408. The rotating stirring teeth 408 disperse the foam floating on the wastewater surface, mixing it with the wastewater. During the rotation of the telescopic pipe 406, the stirring rod 407 rotates, further agitating the wastewater. When the accumulated wastewater and foam reach a certain height, flocculant is added into the flocculation tank 403. The flocculant will flocculate the oil in the wastewater, breaking it down into larger particles. The rotating stirring rod 407 will evenly stir the wastewater and flocculant. After the flocculant and wastewater have flocculated and settled (existing flocculant-wastewater flocculation processes require an initial mixing stage, a flocculation reaction stage, and a flocculation sedimentation stage; existing technologies for controlling flocculant-wastewater flocculation are relatively mature and will not be elaborated upon here), the output port of the rotating lifting device 412 controlling the lifting pipe 405 to rotate is closed. The output port of the rotating lifting device 412 driving the lifting pipe 405 to rotate is opened by the controller. At the same time, the controller controls the solenoid valve to open, so that the position inside the flocculation tank 403 is higher than that of the flow pipe 413. Wastewater flows into the filter return box 414 through the flow pipe 413. Inside the filter return box 414, the wastewater flows slowly within the filter cotton 421, filtering out larger flocculated particles. It then enters the return space through the second one-way valve 416. As the riser pipe 405 drives the bottom plate to rise, the bottom plate squeezes the wastewater inside the flocculation tank 403, causing the wastewater to enter the filter return box 414 through the flow pipe 413. After being filtered by the filter cotton 421, the wastewater flows into the return space. During the rise of the riser pipe 405, it also drives the connecting rod 418, the sealing slide plate 419, and the squeezing plate 417 to rise and fall. The rising squeezing plate 417 squeezes the filtered wastewater inside the return space.Wastewater is returned to the biological tank 1 via the return pipe 420 and the solenoid one-way valve. The returned wastewater impacts the spiral flow of wastewater within the biological tank 1, briefly disrupting the spiral flow and preventing glycerol in the spiral flow from failing to effectively contact the air bubbles. The sliding, lifting, and sealing plate 419 is airtightly connected to the filter return box 414, preventing wastewater from flowing out of the filter return box 414. Regularly removing and cleaning the filter cotton 421 allows for its recycling and recovery of the filtered glycerol flocculation.

[0049] The above 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 will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A glycerol wastewater treatment device, characterized in that, include: Biological pond (1); The collection component (2) includes a lifting plate (205) disposed inside the biological pool (1). The lifting plate (205) is driven to move up and down inside the biological pool (1). A loading box (210) is fixedly installed on the outer wall of the lifting plate (205). A first annular magnetic ring (213) driven to move up and down inside the biological pool (1) is fixedly installed on the upper end face of the lifting plate (205). An extension curtain (211) is fixedly installed on the lower end face of the first annular magnetic ring (213). The lower end of the extension curtain (211) is fixedly connected to the inner bottom end of the loading box (210). The conveying assembly (3) includes a collection tank (302) disposed above the biological pool (1). A lifting plate (304) is airtightly slidably installed inside the collection tank (302). A chassis (306) is fixedly installed on the lower end face of the collection tank (302). Multiple inlet pipes (309) are fixedly installed in a circular array inside the chassis (306). A first one-way valve (310) is fixedly installed on the inner wall of the inlet pipes (309). A second annular magnetic ring (307) is embedded on the lower end face of the chassis (306). The second annular magnetic ring (307) and the first annular magnetic ring (213) are magnetically attracted to each other. The biological pool (1) has multiple fixed seats (201) fixedly installed in a circular array at the bottom inner end. The inner wall of the fixed seat (201) is fixedly installed with an annular pipe (202). The outer wall of the annular pipe (202) is connected to multiple inclined aeration pipes (203) in a circular array. The annular pipe (202) is connected to an aeration device. A main shaft (204) is rotatably mounted at the bottom of the biological pool (1). The upper end of the main shaft (204) passes through the chassis (306) and is rotatably connected to the top of the collection tank (302). A first threaded groove (206) is formed on the outer wall of the main shaft (204) and inside the biological pool (1). A second threaded groove (207) is formed on the outer wall of the main shaft (204) and inside the collection tank (302). The lifting plate (205) is slidably connected to the outer wall of the main shaft (204). The lower end face of the lifting plate (205) is on the outer wall of the main shaft (204). A water seal (209) is fixedly installed. A first electromagnetic clutch (208) is fixedly installed on the upper end of the main shaft (204) and on the outer wall of the main shaft (204). The first electromagnetic clutch (208) is threadedly connected to the first threaded groove (206). The first electromagnetic clutch (208) is electrically connected to a controller. Multiple first brackets (212) are rotatably installed in a circumferential array on the outer wall of the first electromagnetic clutch (208). The end of the first bracket (212) away from the axis of the main shaft (204) is fixedly connected to the first annular magnetic ring (213). The chassis (306) has a slot (308) on its lower end face. The collection tank (302) has a rotary drive (303) fixedly installed on its upper end face. The rotary drive (303) is electrically connected to the controller. The output end of the rotary drive (303) passes through the collection tank (302) and is fixedly connected to the main shaft (204). The inner wall of the lifting plate (304) is rotatably installed with a second electromagnetic clutch (305). The second electromagnetic clutch (305) is threadedly connected to the second threaded groove (207). The outer wall of the biological pool (1) has a circumferential array of multiple second supports (301) fixedly installed. The second supports (301) are fixedly connected to the outer wall of the collection tank (302). The upper end face of the collection tank (302) has an air outlet. It also includes a filter return assembly (4), which includes a support plate (402) fixed to the outer wall of the biological tank (1), a flocculation tank (403) fixedly installed on the upper end face of the support plate (402), an inlet pipe (401) connected to the upper end face of the flocculation tank (403), and a third one-way valve fixedly installed on the inner wall of the inlet pipe (401). Wastewater is discharged into the biological tank (1), causing the lifting plate (205) to be submerged in the wastewater and kept at a certain distance from the wastewater surface. The aeration efficiency needs to be adjusted appropriately so that the wastewater flows slowly in a spiral within the biological tank (1). When a certain amount of bubbles containing glycerol or other oily impurities accumulate on the surface of the wastewater, the rising first electromagnetic clutch (208) will drive the first annular magnetic ring (213) to rise through the first support (212). The rising first annular magnetic ring (213) will stretch the extension curtain (211) and continuously rise. The first annular magnetic ring (213) is magnetically connected to the second annular magnetic ring (307). The extended curtain (211) that is driven to stretch will extend and unfold between the lifting plate (205) and the chassis (306), gathering the foam floating on the surface of the wastewater and containing glycerol and other oily impurities in the middle area to the upper surface of the lifting plate (205). At this time, the controller disconnects the voltage input to the first electromagnetic clutch (208) and controls the voltage input to the second electromagnetic clutch (305), so that the second electromagnetic clutch (305)... Engaging with the second threaded groove (207), the rotating main shaft (204) drives the second electromagnetic clutch (305) and the lifting plate (304) to rise. The rising lifting plate (304) continuously reduces the air pressure between its lower end face and the chassis (306), causing the air pressure between the lifting plate (205) and the chassis (306) to continuously decrease. As the lifting plate (304) continues to rise, the lifting plate (205) slides and rises on the outer wall of the main shaft (204) as the air pressure between it and the chassis (306) continuously decreases. When the lifting plate (205)... When the upper end face of the lifting plate (205) is in contact with the lower end face of the chassis (306), the foam containing glycerin and other oil impurities that gathers above the lifting plate (205) will enter the collection tank (302) through the inlet pipe (309) and the first one-way valve (310); during the process of the lifting plate (304) descending, the first one-way valve (310) closes, and the foam that enters the collection tank (302) is squeezed by the descending lifting plate (304) and enters the flocculation tank (403) through the liquid inlet pipe (401) and the third one-way valve.

2. The glycerol wastewater treatment equipment according to claim 1, characterized in that, The two ends of the inlet pipe (401) are connected to the collection tank (302). The flocculation tank (403) is equipped with two sets of stirring rods (407). Multiple stirring teeth (408) are arranged in a circumferential array on the inner wall of the flocculation tank (403) above the stirring rods (407).

3. The glycerol wastewater treatment equipment according to claim 2, characterized in that, The bottom of the flocculation tank (403) is airtightly slidably fitted with a bottom plate. A telescopic tube (406) is fixedly installed on the upper surface of the bottom plate. The telescopic tube (406) is slidably connected by three sections of sliding tube. The outer walls of two sections of the sliding tube are fixedly connected to the stirring rod (407), and the outer wall of the other section of the sliding tube is fixedly connected to the stirring teeth (408). A top plate (409) is fixedly installed on the upper surface of the telescopic tube (406).

4. The glycerol wastewater treatment equipment according to claim 3, characterized in that, The outer wall of the flocculation tank (403) is symmetrically connected to two external boxes (404). The inner wall of the external box (404) is airtightly slidably fitted with a sliding plate (410). The outer wall of the top plate (409) is provided with a sliding groove. The sliding plate (410) is slidably connected to the sliding groove. A float (411) is fixedly installed on the lower end face of the sliding plate (410). A lifting pipe (405) is fixedly installed on the lower end face of the bottom plate. The outer wall of the lifting pipe (405) is linearly arrayed with multiple annular grooves. A rotary lifting device (412) is fixedly installed on the lower end face of the support plate (402). The rotary lifting device (412) is electrically connected to the controller. The rotary lifting device (412) has two output ends. The two output ends of the rotary lifting device (412) are fixedly connected to and engaged with the lifting pipe (405) respectively.

5. The glycerol wastewater treatment equipment according to claim 4, characterized in that, The outer wall of the flocculation tank (403) is symmetrically connected to two flow pipes (413). A solenoid valve is fixedly installed on the inner wall of the flow pipe (413). The solenoid valve is electrically connected to the controller. The end of the flow pipe (413) away from the flocculation tank (403) is connected to a filter return box (414).

6. The glycerol wastewater treatment equipment according to claim 5, characterized in that, A partition (415) is fixedly installed on the inner wall of the filter return box (414) at the middle position. A second one-way valve (416) is embedded in the partition (415). Filter cotton (421) is fixedly installed on the upper surface of the partition (415). A squeeze plate (417) is airtightly slidably installed on the inner wall of the filter return box (414) below the partition (415). The partition (415), the filter return box (414), and the squeeze plate (417) form a return space. A connecting rod (416) is fixedly installed on one side of the squeeze plate (417). 18), the connecting rod (418) is fixedly connected to the lower end of the lifting pipe (405), a sealing slide plate (419) is fixedly installed on the outer side of the connecting rod (418), the sealing slide plate (419) is airtightly slidably connected to the filter return box (414), the outer wall of the filter return box (414) is connected to the return pipe (420) at the corresponding return space, one end of the return pipe (420) is connected to the biological tank (1), an electromagnetic one-way valve is fixedly installed on the inner wall of the return pipe (420), and the electromagnetic one-way valve is electrically connected to the controller.

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