Hazardous waste chemical sewage zero discharge graded purification treatment equipment

Abstract

The application discloses a kind of hazardous waste chemical industrial wastewater zero discharge graded purification treatment equipment, including sequentially connected pretreatment mechanism, catalytic treatment mechanism, hierarchical precipitation separation mechanism, biological treatment mechanism and membrane separation mechanism;Pretreatment mechanism includes grid intercepting mechanism, grid intercepting mechanism includes grid intercepting containing shell, vertically extending grid support ring shell is fixed in grid intercepting containing shell, a plurality of inner and outer communication and vertically extending grid mounting slot are formed on the side wall of grid support ring shell, and filter grid is installed in grid mounting slot;The equipment can quickly and effectively remove solid particles, colloid and other suspended solids in hazardous waste chemical industrial wastewater, and the grid discharging mechanism can clean the filter grid in time, maintain the effective filtering capacity of the filter grid;Catalytic treatment mechanism can occur a series of oxidation reactions with organic pollutants in wastewater, and gradually decompose organic pollutants into carbon dioxide, water and other harmless inorganic substances.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a graded purification and treatment equipment for zero discharge of hazardous chemical wastewater. Background Technology

[0002] Hazardous waste (hazardous waste) and chemical wastewater refer to wastewater containing hazardous substances generated during chemical production processes. Many chemical reactions produce wastewater. For example, in the petrochemical industry, crude oil refining processes such as atmospheric and vacuum distillation and catalytic cracking generate wastewater containing large amounts of organic matter (such as benzene, toluene, and phenols). These organic substances possess hazardous characteristics such as toxicity and flammability. Common organic substances in chemical wastewater include aromatic hydrocarbons (such as benzene and naphthalene), halogenated hydrocarbons (such as chloroform and carbon tetrachloride), and phenolic compounds. Benzene is a known carcinogen, and long-term exposure can lead to serious diseases such as leukemia. Halogenated hydrocarbons are highly toxic and can damage the human nervous system, liver, and other organs. Phenolic compounds are corrosive and highly toxic to aquatic organisms, affecting the balance of aquatic ecosystems.

[0003] Existing hazardous waste and chemical wastewater treatment equipment is not comprehensive or thorough enough in removing these pollutants during the purification process, and further improvements and optimizations are needed. Summary of the Invention

[0004] The purpose of this invention is to provide a graded purification and treatment equipment for zero discharge of hazardous waste and chemical wastewater, which can more thoroughly and comprehensively purify hazardous waste and chemical wastewater.

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

[0006] A zero-discharge graded purification and treatment device for hazardous waste and chemical wastewater includes a pretreatment unit, a catalytic treatment unit, a graded sedimentation and separation unit, a biological treatment unit, and a membrane separation unit connected in sequence.

[0007] The pretreatment mechanism includes a bar screen filter mechanism, which includes a bar screen filter receiving shell. A vertically extending bar support ring shell is fixed inside the bar screen filter receiving shell. The side wall of the bar support ring shell has multiple bar mounting slots that are interconnected internally and externally and extend vertically. A filter bar is installed in the bar mounting slot.

[0008] The bottom of the bar filter receiving shell is fixed with a bar filter output ring shell. The bottom of the bar filter receiving shell has multiple filter output holes that communicate with the inside of the bar filter output ring shell. The bottom of the bar filter output ring shell is fixed with a bar filter external discharge pipe that communicates with its inside.

[0009] A vertically extending bar filter inlet pipe is fixed to the top of the bar filter housing, and the lower end of the bar filter inlet pipe extends into the inside of the bar support ring housing.

[0010] The bar screen filter outlet pipe is connected to the equalization tank, and the equalization tank is connected to the sedimentation tank through the equalization tank outlet pipe. The sedimentation tank outlet pipe is fixed on the outside of the sedimentation tank and is connected to its interior.

[0011] The catalytic processing mechanism includes a horizontally arranged catalytic processing flow pipe, and a catalytic grid support shaft arranged coaxially with the catalytic processing flow pipe is rotatably connected inside the catalytic processing flow pipe. Multiple catalytic grids extending parallel to its axis are fixed on the outer wall of the catalytic grid support shaft.

[0012] Both the catalytic grid plate and the catalytic grid plate support shaft are coated with a photocatalytic coating, which is a titanium dioxide coating.

[0013] Multiple ultraviolet lamps are installed on the side wall of the catalytic treatment flow tube;

[0014] The graded sedimentation separation mechanism includes a horizontally arranged sedimentation separation flow tube, a reagent dosing mechanism on the side wall of the sedimentation separation flow tube, and a sedimentation interception mechanism inside the sedimentation separation flow tube.

[0015] The biological treatment mechanism includes an annular and hollow aerobic biological treatment ring shell, and an anaerobic biological treatment containment shell is provided inside the aerobic biological treatment ring shell. The aerobic biological treatment ring shell and the anaerobic biological treatment containment shell are connected by multiple biological treatment delivery pipes.

[0016] Multiple aerobic treatment partitions are fixed inside the biological aerobic treatment ring shell. Two adjacent aerobic treatment partitions divide the inside of the biological aerobic treatment ring shell into multiple aerobic treatment chambers. Reinforced positive electrode plates and reinforced negative electrode plates are fixed inside the aerobic treatment chambers.

[0017] Preferably, the regulating tank is connected to a first reserved storage tank via a first reserved conveying pipe, and the regulating tank is connected to a second reserved storage tank via a second reserved conveying pipe;

[0018] The first reserved storage tank is equipped with a first reflux conveying pump, the output end of which is connected to the inside of the regulating tank through a pipeline. The second reserved storage tank is equipped with a second reflux conveying pump, the output end of which is connected to the inside of the regulating tank through a pipeline.

[0019] Note: The first and second reserved storage tanks can temporarily store the wastewater to be treated, facilitating overall management and regulation.

[0020] Preferably, the bar screen filter housing is provided with a bar screen slag discharge mechanism, which includes a slag discharge mechanism support ring housing disposed inside the bar screen support ring housing, and multiple bar screen slag discharge scrapers are fixed on the outer side of the slag discharge mechanism support ring housing.

[0021] The top of the grid filter housing is fixed with a downward-opening slag discharge lifting fixed cylinder, and a downward-opening slag discharge lifting sliding cylinder is slidably connected inside the slag discharge lifting fixed cylinder. The slag discharge mechanism support ring shell is fixedly connected to the lower end of the slag discharge lifting sliding cylinder.

[0022] The slag discharge lifting fixed cylinder is equipped with a slag discharge lifting drive rod for driving the movement of the slag discharge lifting sliding cylinder;

[0023] The bottom of the bar screen containment shell is fixed with a slag collection shell that is connected to the inside of the bar screen support ring shell, and the lower end of the slag collection shell is fixed with a slag discharge pipe that is connected to the inside of the slag discharge pipe.

[0024] Note: The slag removal mechanism can clean the filter screen in a timely manner to maintain its good filtration performance.

[0025] Preferably, a catalytic treatment input pipe and a catalytic treatment output pipe are fixed at both ends of the catalytic treatment flow pipe and are arranged coaxially with it, respectively, and the catalytic treatment input pipe is connected to the external discharge pipe of the sedimentation tank;

[0026] Multiple light-receiving shells are fixed on the outer wall of the catalytic treatment flow tube, and ultraviolet lamps are fixed inside the light-receiving shells;

[0027] The side wall of the catalytic treatment flow pipe has a light penetration groove that is connected to the light-receiving shell, and a transparent light-sealing plate is fixed in the light penetration groove.

[0028] Inside the catalytic processing flow tube, at both ends of the catalytic grid support shaft, there are shaft end support shells. The shaft end support shells are fixedly connected to the inner sidewall of the catalytic processing flow tube through multiple radial guide plates.

[0029] A rotary drive shaft coaxial with the end of the catalytic grid support shaft is fixed. The rotary drive shaft extends into the shaft end support housing, and a rotary drive motor for driving the rotary drive shaft to rotate is fixed inside the shaft end support housing.

[0030] Description: The catalytic treatment unit can undergo a series of oxidation reactions with organic pollutants in wastewater, gradually decomposing the organic pollutants into carbon dioxide, water and other harmless inorganic substances.

[0031] Preferably, a precipitation separation input pipe and a precipitation separation output pipe are fixed at both ends of the precipitation separation flow pipe and are arranged coaxially with it, respectively, and the precipitation separation input pipe is connected to the catalytic treatment output pipe;

[0032] The reagent dosing mechanism includes a dosing tube mating hole disposed on the side wall of the sedimentation separation flow tube and extending radially therethrough, and a reagent dosing tube is slidably connected in the dosing tube mating hole;

[0033] A reagent dosing nozzle is fixed at one end of the reagent dosing tube, which is located inside the sedimentation and separation flow tube.

[0034] Multiple dosing tube drive containers are fixed on the outer wall of the sedimentation separation flow tube, extending radially therein. The reagent dosing tubes extend into each dosing tube drive container in a corresponding manner. The dosing tube drive container is equipped with a dosing tube drive rod for driving the movement of the reagent dosing tube.

[0035] Explanation: The flocculant can be applied to the wastewater using the chemical dosing mechanism. The flocculant reacts chemically with suspended particles and colloidal substances in the wastewater to form larger flocs, which are then easily separated and removed.

[0036] Preferably, the sedimentation interception mechanism includes multiple sedimentation separation interception ring plates fixed on the inner wall of the sedimentation separation flow tube, and the sedimentation separation interception ring plates are arranged perpendicular to the axis of the sedimentation separation flow tube;

[0037] The side wall of the sedimentation separation flow tube has an external discharge cylinder fixing hole that communicates with the inside and outside at the sedimentation separation interception ring plate. An external discharge cylinder with an inward opening is fixed in the external discharge cylinder fixing hole. An external discharge drive shaft is rotatably connected inside the external discharge cylinder. The external discharge drive shaft has sediment external discharge spiral blades.

[0038] An external discharge drive housing is fixed to the outer end of the sedimentation discharge cylinder. The external discharge drive shaft extends into the interior of the external discharge drive housing. An external discharge drive motor for driving the external discharge drive shaft to rotate is fixed inside the external discharge drive housing.

[0039] A sedimentation discharge pipe connected to the interior is fixed to the outside of the sedimentation discharge cylinder;

[0040] A scraper support ring rail extending circumferentially is fixed on the inner wall of the sedimentation separation flow tube. A scraper support slider is slidably connected to the scraper support ring rail, and a sedimentation cleaning scraper is fixed on the scraper support slider.

[0041] Explanation: Hazardous chemical wastewater carrying flocculent sediment continues to flow through the sedimentation separation flow pipe. When it passes through the sedimentation separation interception ring plate, the sedimentation interception mechanism intercepts and separates these flocculent sediments. The sedimentation separation interception ring plate is a hollow mesh filter structure, and the flocculent sediment in the hazardous chemical wastewater will be intercepted on the water-facing side of the sedimentation separation interception ring plate.

[0042] Preferably, an aeration conveying ring is fixed at the bottom of the biological aerobic treatment ring, and the top of the aeration conveying ring is connected to the inside of the biological aerobic treatment ring through multiple aeration conveying through holes. Multiple aeration conveying ball shells are fixed inside the aeration conveying ring, and multiple aeration nozzles connected to the inside of the aeration conveying ball shells are fixed on the outer side of the aeration conveying ball shells. An aeration conveying pipe connected to the inside of the aeration conveying ball shells is provided on the outer side of the aeration conveying ball shells, and an aeration conveying one-way valve is provided on the aeration conveying pipe.

[0043] The interior of the aerobic biological treatment ring is filled with aerobic biological packing material, while the interior of the anaerobic biological treatment containment shell is filled with anaerobic biological packing material.

[0044] The outer side of the biological aerobic treatment ring shell has multiple aerobic treatment input pipes that are connected to its interior, and the bottom of the biological anaerobic treatment containment shell has an anaerobic treatment output pipe that is connected to its interior.

[0045] The precipitation separation output pipe is connected to the aerobic treatment input pipe.

[0046] Explanation: The aeration nozzles generate tiny air bubbles that flow upwards through the various aeration delivery holes into the biological aerobic treatment ring, providing dissolved oxygen for the hazardous chemical wastewater within the ring.

[0047] Preferably, the top of the biological aerobic treatment ring is fixed with an aeration overflow pipe that extends vertically and communicates with its interior, and the aeration overflow pipe has an aeration overflow one-way valve.

[0048] Explanation: The aeration overflow pipe allows excess air inside the biological aerobic treatment ring to be discharged, thus maintaining pressure balance inside and outside the biological aerobic treatment ring.

[0049] Preferably, the membrane separation mechanism includes a membrane separation initiation container shell, an ultrafiltration container ring shell fixed to the outside of the membrane separation initiation container shell, a nanofiltration container ring shell fixed to the outside of the ultrafiltration container ring shell, and a reverse osmosis container ring shell fixed to the outside of the nanofiltration container ring shell.

[0050] Multiple ultrafiltration filters, which are connected to the inside of the ultrafiltration ring shell, are fixed on the outer wall of the membrane separation initiation housing. Multiple nanofiltration filters, which are connected to the inside of the nanofiltration ring shell, are fixed on the outer wall of the ultrafiltration ring shell. Multiple reverse osmosis filters, which are connected to the inside of the reverse osmosis ring shell, are fixed on the outer wall of the nanofiltration ring shell.

[0051] Explanation: Membrane separation units can effectively retain large molecular organic matter and colloids, remove large molecular proteins, polysaccharides, oils and some high molecular polymers from chemical wastewater, and perform desalination and removal of small molecular organic matter.

[0052] Preferably, the top of the membrane separation initiation container shell is fixed with a membrane separation initiation delivery pipe that communicates with its interior, the bottom of the ultrafiltration container ring shell is fixed with an ultrafiltration cut-off output pipe that communicates with its interior, the bottom of the nanofiltration container ring shell is fixed with a nanofiltration cut-off output pipe that communicates with its interior, and the outside of the reverse osmosis container ring shell is fixed with multiple membrane separation main output pipes that communicate with their interiors.

[0053] The anaerobic treatment output pipe is connected to the membrane separation initiation delivery pipe.

[0054] Note: Setting up independent ultrafiltration and nanofiltration interception output pipes facilitates the separate external discharge and cleaning of wastewater inside the ultrafiltration and nanofiltration containment rings.

[0055] Compared with the prior art, the beneficial effects of the present invention are reflected in the following aspects:

[0056] 1. The present invention has a reasonable structural design. The pretreatment mechanism has a high-efficiency filtration capacity, which can quickly and effectively remove suspended solids such as solid particles and colloids from hazardous chemical wastewater. The screen slag discharge mechanism can clean the filter screen in a timely manner to maintain the effective filtration capacity of the filter screen.

[0057] 2. In the catalytic treatment mechanism of the present invention, when light irradiates the semiconductor photocatalyst, electrons in the semiconductor valence band absorb light energy and are excited to the conduction band, thereby generating positively charged holes in the valence band and negatively charged high-energy electrons in the conduction band. These electrons and holes can trigger redox reactions in other substances in the solution. Photogenerated holes have strong oxidizing properties and can oxidize water molecules adsorbed on the catalyst surface to generate hydroxyl radicals; photogenerated electrons have reducing properties and can reduce oxygen molecules adsorbed on the catalyst surface to generate superoxide anion radicals and other active oxygen species. These active oxygen species have extremely high oxidizing power and can undergo a series of oxidation reactions with organic pollutants in wastewater, gradually decomposing organic pollutants into carbon dioxide, water and other harmless inorganic substances.

[0058] 3. The biological treatment mechanism of this invention effectively decomposes easily degradable organic matter in hazardous chemical wastewater, such as sugars, proteins, and fats, nutrients like nitrogen and phosphorus, and some heavy metals.

[0059] 4. The membrane separation mechanism of the present invention can effectively retain macromolecular organic matter and colloids, remove macromolecular proteins, polysaccharides, oils and some high molecular polymers present in chemical wastewater, and perform desalination and removal of small molecule organic matter. Attached Figure Description

[0060] Figure 1 This is a schematic diagram of the overall layout of the present invention;

[0061] Figure 2 This is a schematic diagram of the structure of the bar screen filter mechanism of the present invention;

[0062] Figure 3 yes Figure 2 Top view;

[0063] Figure 4 This is a top view of the limiting and cooperating slider of the present invention;

[0064] Figure 5 This is a top view of the first reserved storage pool of the present invention;

[0065] Figure 6 This is a schematic diagram of the catalytic treatment mechanism of the present invention;

[0066] Figure 7 yes Figure 6 The left view;

[0067] Figure 8 This is a schematic diagram of the structure of the shaft end support shell of the present invention;

[0068] Figure 9 This is a schematic diagram of the structure of the graded precipitation separation mechanism of the present invention;

[0069] Figure 10 This is a schematic diagram of the drug dosing mechanism of the present invention;

[0070] Figure 11 This is a schematic diagram of the precipitation interception mechanism of the present invention;

[0071] Figure 12 This is a schematic diagram of the biological treatment mechanism of the present invention;

[0072] Figure 13 yes Figure 12 Top view;

[0073] Figure 14 This is a schematic diagram of the structure of the aeration conveying ring shell of the present invention;

[0074] Figure 15 This is a schematic diagram of the membrane separation mechanism of the present invention.

[0075] In the diagram, 10-pretreatment mechanism, 11-bar filtration mechanism, 110-filter bar, 111-bar filtration receiving shell, 1110-bar filtration input pipe, 112-bar support ring shell, 113-bar mounting groove, 1130-bar limiting slide groove, 1131-limiting matching slider, 114-bar filtration output ring shell, 1140-filtration output hole, 1141-bar filtration external discharge pipe, 12-bar slag discharge mechanism, 120-bar slag discharge scraper, 121-slag discharge mechanism support ring shell, 122-slag discharge lifting fixed cylinder, 123-slag discharge lifting sliding cylinder, 124-slag discharge lifting drive rod, 125-slag collection shell, 126-slag external discharge pipe, 14-equalization tank, 140-equalization tank external discharge pipe, 15-... - Sedimentation tank, 150- Sedimentation tank outlet pipe, 16- First reserved storage tank, 160- First reserved conveying pipe, 161- First reflux conveying pump, 17- Second reserved storage tank, 170- Second reserved conveying pipe, 171- Second reflux conveying pump, 20- Catalytic treatment mechanism, 21- Catalytic treatment flow pipe, 211- Catalytic grid support shaft, 212- Catalytic grid, 213- Light irradiation housing, 214- Ultraviolet lamp tube, 2150- Light penetration slot, 215- Light irradiation sealing plate, 216- Shaft end support housing, 217- Radial guide plate, 218- Rotary drive shaft, 219- Rotary drive motor, 22- Catalytic treatment input pipe, 23- Catalytic treatment output pipe, 30- Staged sedimentation separation mechanism, 31- Sedimentation tank outlet pipe, 22- Sedimentation tank outlet pipe, 23- Sedimentation tank outlet pipe, 24- Sedimentation tank outlet pipe, 25- Sedimentation tank outlet pipe, 26- Sedimentation tank outlet pipe, 27- Sedimentation tank outlet pipe, 28- Sedimentation tank outlet pipe, 29- Sedimentation tank outlet pipe, 20- Sedimentation tank outlet pipe, 21- Sedimentation tank outlet pipe, 22- Sedimentation tank outlet pipe, 23- Sedimentation tank outlet pipe, 24- Sedimentation tank outlet pipe, 25 ... Sedimentation separation flow pipe, 311-Sedimentation separation input pipe, 312-Sedimentation separation output pipe, 32-Reagent dosing mechanism, 320-Dosing pipe mating hole, 321-Reagent dosing pipe, 322-Dosing pipe drive container, 323-Dosing pipe drive rod, 33-Sedimentation interception mechanism, 331-Sedimentation separation interception ring plate, 332-Sedimentation external discharge cylinder, 3320-External discharge cylinder fixing hole, 333-External discharge drive shaft, 3330-Sedimentation external discharge spiral blade, 334-External discharge drive container shell, 335-External discharge drive motor, 336-Sedimentation slag discharge pipe, 337-Scraper support ring rail, 338-Scraper support slider, 339-Sedimentation cleaning scraper, 40-Biological treatment mechanism, 401-Biological aerobic packing, 402-Biological Anaerobic packing material, 403-Aerobic treatment input pipe, 404-Anaerobic treatment output pipe, 41-Biological aerobic treatment ring shell, 410-Aerobic treatment chamber, 411-Aerobic treatment partition, 42-Biological anaerobic treatment containment shell, 43-Biological treatment delivery pipe, 441-Reinforced positive electrode plate, 442-Reinforced negative electrode plate, 45-Aeration delivery ring shell, 450-Aeration delivery through hole, 451-Aeration delivery spherical shell, 452-Aeration nozzle, 453-Aeration delivery pipe, 4530-Aeration delivery check valve, 50-Membrane separation mechanism, 51-Membrane separation initiation containment shell, 510-Membrane separation initiation delivery pipe, 52-Ultrafiltration containment ring shell, 520-Ultrafiltration retrieval output pipe, 53-Nanofiltration containment ring shell, 530-Nanofiltration retrieval output pipe.54 - Reverse osmosis containment ring, 55 - Ultrafiltration filter, 56 - Nanofiltration filter, 57 - Reverse osmosis filter, 540 - Membrane separation main output pipe. Detailed Implementation

[0076] The following is combined with Figures 1-15 The present invention will be described in detail. For ease of description, the orientations mentioned below are defined as follows: The directions of up, down, left, right, front, and back mentioned below are consistent with the directions of up, down, left, right, front, and back in the projection relationship of the respective main view or structural schematic diagram.

[0077] Example 1:

[0078] A zero-discharge, graded purification and treatment equipment for hazardous waste and chemical wastewater, such as Figure 1 As shown, it includes a pretreatment unit 10, a catalytic treatment unit 20, a fractionation and precipitation separation unit 30, a biological treatment unit 40, and a membrane separation unit 50 that are connected in sequence.

[0079] like Figure 2 As shown, the pretreatment mechanism 10 includes a grid filter mechanism 11, which includes a grid filter receiving shell 111. A vertically extending grid support ring shell 112 is fixed inside the grid filter receiving shell 111. The side wall of the grid support ring shell 112 has multiple grid mounting grooves 113 that are interconnected internally and externally and extend vertically. A filter grid 110 is installed in the grid mounting groove 113.

[0080] The inner wall of the grid mounting groove 113 has a vertically extending grid limiting slide groove 1130. The filter grid 110 has a limiting sliding block 1131 fixed on its side. The limiting sliding block 1131 is slidably connected in the grid limiting slide groove 1130.

[0081] The bottom of the grid filter receiving shell 111 is fixed with a grid filter output ring shell 114. The bottom of the grid filter receiving shell 111 has a plurality of filter output holes 1140 that communicate with the inside of the grid filter output ring shell 114. The bottom of the grid filter output ring shell 114 is fixed with a grid filter external discharge pipe 1141 that communicates with the inside of the grid filter output ring shell 114.

[0082] A vertically extending bar filter inlet pipe 1110 is fixed to the top of the bar filter housing 111, and the lower end of the bar filter inlet pipe 1110 extends into the inside of the bar support ring housing 112.

[0083] The bar screen drain pipe 1141 is connected to the equalization tank 14, and the equalization tank 14 is connected to the sedimentation tank 15 through the equalization tank drain pipe 140. The sedimentation tank 15 is fixed to the outside of the sedimentation tank and connected to its interior.

[0084] like Figure 6As shown, the catalytic processing mechanism 20 includes a horizontally arranged catalytic processing flow pipe 21, and a catalytic grid support shaft 211 coaxially arranged inside the catalytic processing flow pipe 21. Multiple catalytic grids 212 extending parallel to its axis are fixed on the outer wall of the catalytic grid support shaft 211.

[0085] Both the catalytic grid plate 212 and the catalytic grid plate support shaft 211 have a photocatalytic coating, which is a titanium dioxide coating.

[0086] like Figure 7 As shown, multiple ultraviolet lamps 214 are provided on the side wall of the catalytic treatment flow tube 21;

[0087] like Figure 9 As shown, the graded precipitation separation mechanism 30 includes a horizontally arranged precipitation separation flow tube 31, a reagent dosing mechanism 32 is provided on the side wall of the precipitation separation flow tube 31, and a precipitation interception mechanism 33 is provided inside the precipitation separation flow tube 31.

[0088] like Figure 12 As shown, the biological treatment mechanism 40 includes an annular and hollow aerobic biological treatment ring shell 41, and an anaerobic biological treatment containment shell 42 is provided inside the aerobic biological treatment ring shell 41. The aerobic biological treatment ring shell 41 and the anaerobic biological treatment containment shell 42 are connected by multiple biological treatment delivery pipes 43.

[0089] The biological aerobic treatment ring shell 41 has multiple aerobic treatment partitions 411 fixed inside. Two adjacent aerobic treatment partitions 411 divide the interior of the biological aerobic treatment ring shell 41 into multiple aerobic treatment chambers 410. A reinforced positive electrode plate 441 and a reinforced negative electrode plate 442 are fixed inside the aerobic treatment chamber 410.

[0090] like Figure 6 As shown, the two ends of the catalytic treatment flow pipe 21 are respectively fixed with a catalytic treatment input pipe 22 and a catalytic treatment output pipe 23 arranged coaxially with it. The catalytic treatment input pipe 22 is connected to the sedimentation tank discharge pipe 150.

[0091] like Figure 7 As shown, multiple light-receiving shells 213 are fixed on the outer wall of the catalytic treatment flow tube 21, and ultraviolet lamp tubes 214 are fixed inside the light-receiving shells 213.

[0092] The side wall of the catalytic processing flow pipe 21 has a light penetration groove 2150 that is connected to the light irradiation housing 213, and a transparent light sealing plate 215 is fixed in the light penetration groove 2150.

[0093] like Figure 8As shown, a shaft end support shell 216 is provided at both ends of the catalytic grid support shaft 211 inside the catalytic processing flow pipe 21. The shaft end support shell 216 is fixedly connected to the inner side wall of the catalytic processing flow pipe 21 through multiple radial guide plates 217.

[0094] A rotary drive shaft 218 coaxial with the end of the catalyst grid support shaft 211 is fixed. The rotary drive shaft 218 extends into the shaft end support shell 216. A rotary drive motor 219 for driving the rotary drive shaft 218 to rotate is fixed inside the shaft end support shell 216.

[0095] The rotary drive motor 219 is a prior art motor, and the output shaft of the rotary drive motor 219 drives the rotary drive shaft 218 to rotate through gear transmission.

[0096] like Figure 9 As shown, precipitation separation flow pipe 31 has a precipitation separation input pipe 311 and a precipitation separation output pipe 312 arranged coaxially with it at both ends. The precipitation separation input pipe 311 is connected to the catalytic treatment output pipe 23.

[0097] like Figure 10 As shown, the reagent dosing mechanism 32 includes a dosing tube mating hole 320 disposed on the side wall of the sedimentation separation flow tube 31 and extending radially therethrough, and a reagent dosing tube 321 is slidably connected in the dosing tube mating hole 320;

[0098] A reagent dosing tube 321 is fixed to one end inside the sedimentation separation flow tube 31 with a reagent dosing nozzle 3210;

[0099] The reagent dosing tubes 321 are arranged in a circle around the sedimentation separation flow tube 31, forming a group. Multiple groups of reagent dosing tubes 321 are arranged along the axial direction of the sedimentation separation flow tube 31.

[0100] Multiple dosing tube drive receiving cylinders 322 extending radially are fixed on the outer wall of the sedimentation separation flow tube 31. The reagent dosing tubes 321 extend into each dosing tube drive receiving cylinder 322 in a corresponding manner. The dosing tube drive receiving cylinder 322 is provided with a dosing tube drive rod 323 for driving the dosing tubes 321 to move.

[0101] The dosing tube drive rod 323 is an existing electrically controlled telescopic rod. The outer end of the dosing tube drive rod 323 is fixedly connected to the inner end of the dosing tube drive receiving cylinder 322, and the inner end of the dosing tube drive rod 323 is fixedly connected to the drug dosing tube 321.

[0102] like Figure 11 As shown, the sedimentation interception mechanism 33 includes a plurality of sedimentation separation interception ring plates 331 fixed on the inner side wall of the sedimentation separation flow pipe 31, and the sedimentation separation interception ring plates 331 are arranged perpendicular to the axis of the sedimentation separation flow pipe 31.

[0103] Multiple sedimentation separation interception ring plates 331 are arranged along the axial direction of sedimentation separation flow pipe 31;

[0104] The sedimentation separation flow tube 31 has an external discharge cylinder fixing hole 3320 with internal and external communication at the sedimentation separation interception ring plate 331 on its side wall. An external discharge cylinder 332 with an inward opening is fixed inside the external discharge cylinder fixing hole 332. An external discharge drive shaft 333 is rotatably connected inside the external discharge cylinder 332. An external discharge spiral blade 3330 is provided on the external discharge drive shaft 333.

[0105] An external discharge cylinder 332 has an external discharge drive housing 334 fixed at its outer end. An external discharge drive shaft 333 extends into the external discharge drive housing 334. An external discharge drive motor 335 for driving the external discharge drive shaft 333 to rotate is fixed inside the external discharge drive housing 334.

[0106] A sedimentation discharge pipe 336, which is connected to the interior of the sedimentation discharge cylinder 332, is fixed on the outside of the cylinder.

[0107] A scraper support ring rail 337 extending circumferentially is fixed on the inner wall of the sedimentation separation flow tube 31. A scraper support slider 338 is slidably connected to the scraper support ring rail 337. A sedimentation cleaning scraper 339 is fixed on the scraper support slider 338.

[0108] like Figure 14 As shown, an aeration conveying ring shell 45 is fixed at the bottom of the biological aerobic treatment ring shell 41. The top of the aeration conveying ring shell 45 is connected to the inside of the biological aerobic treatment ring shell 41 through multiple 450s. Multiple aeration conveying ball shells 451 are fixed inside the aeration conveying ring shell 45. Multiple aeration nozzles 452 connected to the inside are fixed on the outer side of the aeration conveying ball shell 451. An aeration conveying pipe 453 connected to the inside is located on the outer side of the aeration conveying ball shell 451. An aeration conveying one-way valve 4530 is located on the aeration conveying pipe 453.

[0109] The aeration delivery pipe 453 is connected to an existing air delivery pump, and the existing air delivery pump is used to deliver air to the inside of the aeration delivery ball shell 451 through the aeration delivery pipe 453.

[0110] The biological aerobic treatment ring shell 41 is filled with biological aerobic packing material 401, and the biological anaerobic treatment containment shell 42 is filled with biological anaerobic packing material 402.

[0111] The outer side of the biological aerobic treatment ring shell 41 has multiple aerobic treatment input pipes 403 that are connected to its interior, and the bottom of the biological anaerobic treatment receiving shell 42 has an anaerobic treatment output pipe 404 that is connected to its interior.

[0112] The sedimentation separation output pipe 312 is connected to the aerobic treatment input pipe 403.

[0113] like Figure 15 As shown, the membrane separation mechanism 50 includes a membrane separation initiation housing 51, an ultrafiltration housing ring 52 is fixed to the outside of the membrane separation initiation housing 51, a nanofiltration housing ring 53 is fixed to the outside of the ultrafiltration housing ring 52, and a reverse osmosis housing ring 54 is fixed to the outside of the nanofiltration housing ring 53.

[0114] Multiple ultrafiltration filters 55, which are connected to the inside of ultrafiltration housing ring 52, are fixed on the outer wall of the membrane separation initiation housing 51. Multiple nanofiltration filters 56, which are connected to the inside of nanofiltration housing ring 53, are fixed on the outer wall of the ultrafiltration housing ring 52. Multiple reverse osmosis filters 57, which are connected to the inside of reverse osmosis housing ring 54, are fixed on the outer wall of the nanofiltration housing ring 53.

[0115] The ultrafiltration filter 55 is an existing external pressure hollow fiber membrane ultrafiltration filter. The input end of the ultrafiltration filter 55 is connected to the inside of the membrane separation initiation housing 51, and the output end of the ultrafiltration filter 55 is connected to the inside of the ultrafiltration housing ring housing 52.

[0116] Nanofiltration filter 56 is an existing external pressure hollow fiber membrane nanofiltration filter. The input end of nanofiltration filter 56 is connected to the inside of ultrafiltration housing ring 52, and the output end of nanofiltration filter 56 is connected to the inside of nanofiltration housing ring 53.

[0117] The reverse osmosis filter 57 is a polyamide composite membrane reverse osmosis filter of the prior art. The inlet end of the reverse osmosis filter 57 is connected to the inside of the nanofiltration housing ring 53, and the outlet end of the reverse osmosis filter 57 is connected to the inside of the reverse osmosis housing ring 54.

[0118] The membrane separation initiation housing 51 has a membrane separation initiation delivery pipe 510 connected to its interior fixed at the top, the ultrafiltration housing ring 52 has an ultrafiltration retention output pipe 520 connected to its interior fixed at the bottom, the nanofiltration housing ring 53 has a nanofiltration retention output pipe 530 connected to its interior fixed at the bottom, and the reverse osmosis housing ring 54 has multiple membrane separation total output pipes 540 connected to its interior fixed on its outer side.

[0119] The anaerobic treatment output pipe 404 is connected to the membrane separation initiation delivery pipe 510.

[0120] Example 2:

[0121] Based on Example 1, such as Figure 5 As shown, the regulating tank 14 is connected to the first reserved storage tank 16 through the first reserved conveying pipe 160, and the regulating tank 14 is connected to the second reserved storage tank 17 through the second reserved conveying pipe 170.

[0122] The first reserved storage tank 16 is equipped with a first reflux pump 161, the output end of which is connected to the inside of the regulating tank 14 through a pipe. The second reserved storage tank 17 is equipped with a second reflux pump 171, the output end of which is connected to the inside of the regulating tank 14 through a pipe.

[0123] Example 3:

[0124] Based on Example 2, such as Figure 2 As shown, the bar screen filter housing 111 is provided with a bar screen slag discharge mechanism 12. The bar screen slag discharge mechanism 12 includes a slag discharge mechanism support ring housing 121 disposed inside the bar screen support ring housing 112. Multiple bar screen slag discharge scrapers 120 are fixed on the outer side of the slag discharge mechanism support ring housing 121.

[0125] The top of the grid filter housing 111 is fixed with a downward-facing slag discharge lifting fixed cylinder 122. A downward-facing slag discharge lifting fixed cylinder 122 is slidably connected to a downward-facing slag discharge lifting sliding cylinder 123. The slag discharge mechanism support ring housing 121 is fixedly connected to the lower end of the slag discharge lifting sliding cylinder 123.

[0126] The slag discharge lifting fixed cylinder 122 is provided with a slag discharge lifting drive rod 124 for driving the slag discharge lifting sliding cylinder 123 to move. The slag discharge lifting drive rod 124 is an existing electric control telescopic rod. The outer rod end of the slag discharge lifting drive rod 124 is fixedly connected to the top of the slag discharge lifting sliding cylinder 123, and the inner rod end of the slag discharge lifting drive rod 124 is fixedly connected to the bottom of the slag discharge lifting sliding cylinder 123.

[0127] The bottom of the bar screen housing 111 is fixed with a slag collection shell 125 that communicates with the inside of the bar screen support ring housing 112, and the lower end of the slag collection shell 125 is fixed with a slag discharge pipe 126 that communicates with the inside of the slag discharge pipe.

[0128] Example 4:

[0129] Based on Example 3, such as Figure 12 As shown, the top of the biological aerobic treatment ring shell 41 is fixed with an aeration overflow pipe 454 that extends vertically and is connected to the interior of the ring. The aeration overflow pipe 454 has an aeration overflow check valve 4540.

[0130] In practical application, the hazardous chemical wastewater to be treated is first filtered to intercept and remove larger solid impurities in the wastewater. The hazardous chemical wastewater to be treated is then fed into the inside of the grid support ring shell 112 through the grid filter input pipe 1110 using a conveying pump of existing technology. The slag discharge pipe 126 has a valve, and at this time the valve on the slag discharge pipe 126 is in the closed state.

[0131] Hazardous chemical wastewater enters the grid support ring 112 and flows from the inside out through each filter grid 110. Multiple filter grids 110 intercept impurities on the inside of the grid support ring 112.

[0132] The filter outlet 1140 is located between the outer wall of the grid support ring shell 112 and the inner wall of the grid filter receiving shell 111. The filtered hazardous chemical wastewater enters the grid filter outlet ring shell 114 through the filter outlet 1140 and is finally discharged from the grid filter outlet pipe 1141.

[0133] The slag discharge mechanism 12 is used to clean the impurities intercepted inside the slag support ring shell 112. The inner rod of the slag discharge lifting drive rod 124 extends and drives the slag discharge lifting sliding cylinder 123 to move from top to bottom together with the slag discharge mechanism support ring shell 121. The multi-plate slag discharge scraper 120 is used to scrape and clean the impurities attached to the filter slag 110. The cleaned impurities will fall into the slag discharge collection shell 125. The valve on the slag discharge pipe 126 is opened. Under the impact of the water flow, the cleaned impurities are discharged through the slag discharge pipe 126. Then the valve on the slag discharge pipe 126 is closed.

[0134] The hazardous chemical wastewater discharged from the bar screen discharge pipe 1141 then enters the equalization tank 14, where the pH of the hazardous chemical wastewater is adjusted to 7.5. Then, the hazardous chemical wastewater in the equalization tank 14 is discharged through the equalization tank discharge pipe 140 and enters the sedimentation tank 15 for static sedimentation for 18 hours.

[0135] Using existing technology, the settled hazardous chemical wastewater is transported to the catalytic treatment flow pipe 21 through the catalytic treatment input pipe 22 via a transfer pump. During the flow of the hazardous chemical wastewater in the catalytic treatment flow pipe 21, the ultraviolet lamp 214 is turned on to irradiate the catalytic grid plate 212 and the catalytic grid plate support shaft 211. Under the oxidative catalytic action of titanium dioxide, organic pollutants can be decomposed into carbon dioxide, water and other harmless inorganic substances. It can also decompose and destroy chlorinated aliphatic hydrocarbons and chlorinated aromatic hydrocarbons, pesticides, dyes and other difficult-to-degrade substances contained in the hazardous chemical wastewater.

[0136] During the catalytic process, the rotary drive motor 219 drives the rotary drive shaft 218 together with the catalyst grid support shaft 211 and the catalyst grid 212 to rotate, so that the outer surfaces of the catalyst grid 212 and the catalyst grid support shaft 211 can receive the irradiation of the ultraviolet lamp tube 214 evenly.

[0137] After catalytic treatment, the hazardous chemical wastewater is discharged from the catalytic treatment output pipe 23 and then enters the sedimentation separation flow pipe 31 through the sedimentation separation input pipe 311. During the flow of the hazardous chemical wastewater in the sedimentation separation flow pipe 31, the inner rod of the dosing pipe drive rod 323 extends out and drives the agent dosing pipe 321 to move along the axis of the dosing pipe mating hole 320, so that the agent dosing pipe 321 extends into the interior of the sedimentation separation flow pipe 31. The existing technology delivery pump delivers polyacrylamide flocculant to each agent dosing pipe 321. Finally, the flocculant is sprayed out from the agent dosing nozzle 3210 and mixes with the hazardous chemical wastewater, and reacts chemically with the suspended particles and colloidal substances in the hazardous chemical wastewater to form larger floc precipitates.

[0138] The sedimentation interception mechanism 33 is used to intercept and separate these flocculent precipitates. The hazardous chemical wastewater carrying the flocculent precipitates continues to flow in the sedimentation separation flow pipe 31. When passing through the sedimentation separation interception ring plate 331, which has a hollow mesh filter structure, the flocculent precipitates in the hazardous chemical wastewater will be intercepted on the water-facing side of the sedimentation separation interception ring plate 331.

[0139] The scraper support slider 338 is driven by a motor of the prior art to move along the scraper support ring rail 337 via gear transmission. The scraper support slider 338 drives the sedimentation cleaning scraper 339 to move together. The sedimentation cleaning scraper 339 uses the sedimentation cleaning scraper 339 to push the floc sedimentation scraper attached to the side of the sedimentation separation interception ring plate 331 to the sedimentation outer discharge cylinder 332. The outer discharge drive motor 335 drives the outer discharge drive shaft 333 to rotate, which in turn drives the sedimentation outer discharge spiral blade 3330 to rotate together. The sedimentation outer discharge spiral blade 3330 uses the conveying action of the sedimentation outer discharge spiral blade 3330 to transport the floc sedimentation into the sedimentation outer discharge cylinder 332. Finally, the floc sedimentation is discharged through the sedimentation slag discharge pipe 336 under the conveying action of the sedimentation outer discharge spiral blade 3330.

[0140] After sedimentation and separation, the hazardous chemical wastewater is discharged from the sedimentation and separation output pipe 312 and input into the biological aerobic treatment ring shell 41 through the aerobic treatment input pipe 403. The hazardous chemical wastewater undergoes aerobic biological treatment in the biological aerobic treatment ring shell 41. After aerobic biological treatment, the hazardous chemical wastewater enters the biological anaerobic treatment container shell 42 through the biological treatment conveying pipe 43. The hazardous chemical wastewater undergoes anaerobic biological treatment in the biological anaerobic treatment container shell 42. Through aerobic and anaerobic biological treatment, organic pollutants in the hazardous chemical wastewater can be effectively removed, and the chemical oxygen demand (COD) and biochemical oxygen demand (BOD) can be reduced.

[0141] Using an existing air pump, air is delivered into the aeration conveying sphere 451 through the aeration conveying pipe 453. The air is discharged through the aeration nozzle 452 to form tiny air bubbles. The air bubbles flow from bottom to top through each aeration conveying through hole 450 and enter the biological aerobic treatment ring shell 41 to provide dissolved oxygen for the hazardous chemical wastewater in the biological aerobic treatment ring shell 41.

[0142] Finally, the hazardous chemical wastewater is purified using the membrane separation unit 50. After anaerobic biological treatment, the hazardous chemical wastewater is discharged from the anaerobic treatment output pipe 404 and enters the membrane separation initiation container 51 through the membrane separation initiation delivery pipe 510. The hazardous chemical wastewater in the membrane separation initiation container 51 passes through each ultrafiltration filter 55 and enters the ultrafiltration container ring shell 52. The hazardous chemical wastewater in the ultrafiltration container ring shell 52 passes through each nanofiltration filter 56 and enters the nanofiltration container ring shell 53. The hazardous chemical wastewater in the nanofiltration container ring shell 53 passes through each reverse osmosis filter 57 and enters the reverse osmosis container ring shell 54. The hazardous chemical wastewater is purified by the ultrafiltration filter 55, nanofiltration filter 56 and reverse osmosis filter 57 in sequence, effectively removing large molecular organic matter, colloids and bacteria, divalent and above ions and small molecular organic matter from the hazardous chemical wastewater, ensuring that the effluent water quality meets the requirements of zero discharge. The hazardous chemical wastewater after membrane separation treatment is finally discharged from the membrane separation main output pipe 540.

Claims

1. A graded purification and treatment equipment for zero discharge of hazardous waste and chemical wastewater, characterized in that, It includes a pretreatment unit (10), a catalytic treatment unit (20), a staged precipitation separation unit (30), a biological treatment unit (40), and a membrane separation unit (50) connected in sequence. The pretreatment mechanism (10) includes a bar screen filter mechanism (11), which includes a bar screen filter receiving shell (111). A vertically extending bar support ring shell (112) is fixed inside the bar screen filter receiving shell (111). The side wall of the bar support ring shell (112) has a plurality of bar screen mounting grooves (113) that are interconnected internally and externally and extend vertically. A filter bar (110) is installed in the bar screen mounting groove (113). The bottom of the grid filter receiving shell (111) is fixed with a grid filter output ring shell (114). The bottom of the grid filter receiving shell (111) has a plurality of filter output holes (1140) that communicate with the inside of the grid filter output ring shell (114). The bottom of the grid filter output ring shell (114) is fixed with a grid filter external discharge pipe (1141) that communicates with the inside of the grid filter. The top of the grid filter receiving shell (111) is fixed with a vertically extending grid filter input pipe (1110), and the lower end of the grid filter input pipe (1110) extends into the inside of the grid support ring shell (112). The grid filter outlet pipe (1141) is connected to the regulating tank (14), and the regulating tank (14) is connected to the sedimentation tank (15) through the regulating tank outlet pipe (140). The sedimentation tank (15) is fixed on the outside and connected to the inside of the sedimentation tank. The catalytic processing mechanism (20) includes a horizontally arranged catalytic processing flow pipe (21), and a catalytic grid support shaft (211) coaxially arranged inside the catalytic processing flow pipe (21). Multiple catalytic grids (212) extending parallel to its axis are fixed on the outer wall of the catalytic grid support shaft (211). Both the catalytic grid plate (212) and the catalytic grid plate support shaft (211) have a photocatalytic coating, which is a titanium dioxide coating; Multiple ultraviolet lamps (214) are provided on the side wall of the catalytic treatment flow tube (21). The graded precipitation separation mechanism (30) includes a horizontally arranged precipitation separation flow tube (31), a reagent dosing mechanism (32) is provided on the side wall of the precipitation separation flow tube (31), and a precipitation interception mechanism (33) is provided inside the precipitation separation flow tube (31). The sedimentation interception mechanism (33) includes a plurality of sedimentation separation interception ring plates (331) fixed on the inner side wall of the sedimentation separation flow pipe (31), and the sedimentation separation interception ring plates (331) are arranged perpendicular to the axis of the sedimentation separation flow pipe (31); The sedimentation separation flow tube (31) has an external discharge cylinder fixing hole (3320) on its side wall at the sedimentation separation interception ring plate (331) that is connected to the inside and outside. An external discharge cylinder (332) with its opening facing inward is fixed in the external discharge cylinder fixing hole (3320). An external discharge drive shaft (333) is rotatably connected inside the external discharge cylinder (332). An external discharge spiral blade (3330) is provided on the external discharge drive shaft (333). The outer end of the sedimentation discharge cylinder (332) is fixed with a discharge drive housing (334), the discharge drive shaft (333) extends into the discharge drive housing (334), and the discharge drive housing (334) is fixed with a discharge drive motor (335) for driving the discharge drive shaft (333) to rotate. The sedimentation outer discharge cylinder (332) is fixed with a sedimentation slag discharge pipe (336) that communicates with its interior. The inner wall of the sedimentation separation flow tube (31) is fixed with a scraper support ring rail (337) extending around it in the circumference. A scraper support slider (338) is slidably connected on the scraper support ring rail (337). A sedimentation cleaning scraper (339) is fixed on the scraper support slider (338). The biological treatment mechanism (40) includes an annular and hollow aerobic biological treatment ring shell (41), and an anaerobic biological treatment containment shell (42) is provided inside the aerobic biological treatment ring shell (41). The aerobic biological treatment ring shell (41) and the anaerobic biological treatment containment shell (42) are connected by multiple biological treatment delivery pipes (43). The biological aerobic treatment ring shell (41) has multiple aerobic treatment partitions (411) fixed inside. Two adjacent aerobic treatment partitions (411) divide the interior of the biological aerobic treatment ring shell (41) into multiple aerobic treatment chambers (410). The aerobic treatment chambers (410) have reinforced positive electrode plates (441) and reinforced negative electrode plates (442) fixed inside.

2. The hazardous waste and chemical wastewater zero-discharge graded purification treatment equipment according to claim 1, characterized in that, The regulating tank (14) is connected to the first reserved storage tank (16) through the first reserved delivery pipe (160), and the regulating tank (14) is connected to the second reserved storage tank (17) through the second reserved delivery pipe (170). The first reserved storage pool (16) is equipped with a first reflux pump (161), and the output end of the first reflux pump (161) is connected to the inside of the regulating pool (14) through a pipe. The second reserved storage pool (17) is equipped with a second reflux pump (171), and the output end of the second reflux pump (171) is connected to the inside of the regulating pool (14) through a pipe.

3. The hazardous waste and chemical wastewater zero-discharge graded purification treatment equipment according to claim 1, characterized in that, The grid filter housing (111) is provided with a grid slag discharge mechanism (12). The grid slag discharge mechanism (12) includes a slag discharge mechanism support ring shell (121) disposed inside the grid support ring shell (112). Multiple grid slag discharge scrapers (120) are fixed on the outer side of the slag discharge mechanism support ring shell (121). The top of the grid filter housing (111) is fixed with a downward-facing slag discharge lifting fixed cylinder (122), and a downward-facing slag discharge lifting fixed cylinder (122) is slidably connected inside the slag discharge lifting fixed cylinder (122). The slag discharge mechanism support ring housing (121) is fixedly connected to the lower end of the slag discharge lifting sliding cylinder (123). The slag discharge lifting fixed cylinder (122) is provided with a slag discharge lifting drive rod (124) for driving the slag discharge lifting sliding cylinder (123) to move. The bottom of the grid filter housing (111) is fixed with a slag collection shell (125) that communicates with the inside of the grid support ring shell (112), and the lower end of the slag collection shell (125) is fixed with a slag discharge pipe (126) that communicates with the inside of it.

4. The hazardous waste and chemical wastewater zero-discharge graded purification treatment equipment according to claim 1, characterized in that, The catalytic treatment flow pipe (21) has a catalytic treatment input pipe (22) and a catalytic treatment output pipe (23) fixed at both ends, which are arranged coaxially with it. The catalytic treatment input pipe (22) is connected to the sedimentation tank discharge pipe (150). Multiple light-receiving shells (213) are fixed on the outer wall of the catalytic treatment flow tube (21), and the ultraviolet lamp tube (214) is fixed inside the light-receiving shell (213); The side wall of the catalytic processing flow pipe (21) has a light penetration groove (2150) that is connected to the light receiving shell (213), and a transparent light sealing plate (215) is fixed in the light penetration groove (2150). The catalytic processing flow pipe (21) is provided with shaft end support shells (216) at both ends of the catalytic grid support shaft (211). The shaft end support shells (216) are fixedly connected to the inner sidewall of the catalytic processing flow pipe (21) through multiple radial guide plates (217). The catalyst grid support shaft (211) is fixed with a coaxial rotary drive shaft (218) at its end. The rotary drive shaft (218) extends into the shaft end support shell (216). The shaft end support shell (216) is fixed with a rotary drive motor (219) for driving the rotary drive shaft (218) to rotate.

5. The hazardous waste and chemical wastewater zero-discharge graded purification treatment equipment according to claim 4, characterized in that, The precipitation separation flow pipe (31) has a precipitation separation input pipe (311) and a precipitation separation output pipe (312) arranged coaxially with it at both ends. The precipitation separation input pipe (311) is connected to the catalytic treatment output pipe (23). The drug dosing mechanism (32) includes a dosing tube mating hole (320) disposed on the side wall of the sedimentation separation flow tube (31) and extending radially therethrough, and a drug dosing tube (321) is slidably connected in the dosing tube mating hole (320). The drug dosing tube (321) is located inside the sedimentation separation flow tube (31) and a drug dosing nozzle (3210) is fixed at one end. The outer wall of the sedimentation separation flow tube (31) is fixed with a plurality of dosing tube drive receiving cylinders (322) extending radially therefrom. The drug dosing tubes (321) extend one by one into each of the dosing tube drive receiving cylinders (322). The dosing tube drive receiving cylinders (322) are provided with dosing tube drive rods (323) for driving the drug dosing tubes (321) to move.

6. The hazardous waste and chemical wastewater zero-discharge graded purification treatment equipment according to claim 5, characterized in that, The bottom of the biological aerobic treatment ring shell (41) is fixed with an aeration conveying ring shell (45). The top of the aeration conveying ring shell (45) is connected to the inside of the biological aerobic treatment ring shell (41) through multiple aeration conveying through holes (450). Multiple aeration conveying ball shells (451) are fixed inside the aeration conveying ring shell (45). Multiple aeration nozzles (452) connected to the inside of the aeration conveying ball shell (451) are fixed on the outer side of the aeration conveying ball shell (451). An aeration conveying pipe (453) connected to the inside of the aeration conveying ball shell (451) is provided on the outer side of the aeration conveying ball shell (451). An aeration conveying one-way valve (4530) is provided on the aeration conveying pipe (453). The biological aerobic treatment ring shell (41) is filled with biological aerobic packing material (401), and the biological anaerobic treatment containment shell (42) is filled with biological anaerobic packing material (402). The outer side of the biological aerobic treatment ring shell (41) has multiple aerobic treatment input pipes (403) that are connected to its interior, and the bottom of the biological anaerobic treatment receiving shell (42) has an anaerobic treatment output pipe (404) that is connected to its interior. The precipitation separation output pipe (312) is connected to the aerobic treatment input pipe (403).

7. The hazardous waste and chemical wastewater zero-discharge graded purification treatment equipment according to claim 1, characterized in that, The top of the biological aerobic treatment ring (41) is fixed with an aeration overflow pipe (454) that extends vertically and communicates with its interior. The aeration overflow pipe (454) has an aeration overflow check valve (4540).

8. The hazardous waste and chemical wastewater zero-discharge graded purification treatment equipment according to claim 6, characterized in that, The membrane separation mechanism (50) includes a membrane separation initiation housing (51), an ultrafiltration housing ring (52) is fixed to the outside of the membrane separation initiation housing (51), a nanofiltration housing ring (53) is fixed to the outside of the ultrafiltration housing ring (52), and a reverse osmosis housing ring (54) is fixed to the outside of the nanofiltration housing ring (53). Multiple ultrafiltration filters (55) that communicate with the interior of the ultrafiltration housing (52) are fixed on the outer wall of the membrane separation initiation housing (51). Multiple nanofiltration filters (56) that communicate with the interior of the nanofiltration housing (53) are fixed on the outer wall of the ultrafiltration housing (52). Multiple reverse osmosis filters (57) that communicate with the interior of the reverse osmosis housing (54) are fixed on the outer wall of the nanofiltration housing (53). The membrane separation initiation housing (51) has a membrane separation initiation delivery pipe (510) connected to its interior fixed at the top, the ultrafiltration housing ring (52) has an ultrafiltration cut-off output pipe (520) connected to its interior fixed at the bottom, the nanofiltration housing ring (53) has a nanofiltration cut-off output pipe (530) connected to its interior fixed at the bottom, and the reverse osmosis housing ring (54) has multiple membrane separation total output pipes (540) connected to its interior fixed on the outside. The anaerobic treatment output pipe (404) is connected to the membrane separation initiation delivery pipe (510).

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