CN115196835B - Industrial sewage treatment system and method - Google Patents

Abstract

The invention discloses an industrial sewage treatment system and method, comprising treatment equipment, an adjusting tank, a sedimentation tank, a hydrolytic acidification tank, an anoxic tank, a contact aerobic tank, a primary sedimentation tank, a secondary sedimentation tank, a clean water tank, an MBR membrane tank, a filter exchange device, a recycling barrel, a first-stage RO filter, a pure water tank and a sludge collecting tank. Compared with the prior art, the method can remove or convert organic matters, inorganic matters and metal ions in the sewage generated in the surface treatment process of the hardware, and obtain clear water which can be reused in the surface treatment process of the hardware, so that the industrial sewage can be discharged by 0, on one hand, environmental pollution caused by directly discharging the sewage can be avoided, and on the other hand, the sewage can be reused after being treated, so that the utilization rate of water resources is improved.

Description

Industrial sewage treatment system and method

Technical Field

The invention relates to the technical field of sewage treatment, in particular to an industrial sewage treatment system and method.

Background

The hardware is a kind of auxiliary and accessory metal products commonly used by people in daily life and industrial production, and is named as the metal products which are made of metal materials such as gold, silver, copper, iron, tin and the like in early stages. In order to improve the rust resistance and the aesthetic degree of the hardware, the hardware is generally subjected to surface treatment such as electroplating, polishing and the like in the production process. The surface treatment process of the hardware product can produce sewage rich in organic matters, inorganic matters and metal ions. If the sewage is directly discharged without treatment, the pollution to the environment is unavoidable.

Disclosure of Invention

The invention aims at: aiming at the defects existing in the prior art, the industrial sewage treatment system and the industrial sewage treatment method can remove or reduce organic matters, inorganic matters and metal ions in sewage generated in the surface treatment process of hardware, and clear water which can be reused in the surface treatment process of the hardware is obtained, so that environmental pollution caused by directly discharging sewage is avoided.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the utility model provides an industrial sewage treatment system, includes pretreatment equipment, equalizing basin, sedimentation tank, hydrolysis acidification tank, anoxic tank, contact good oxygen pond, primary sedimentation tank, redeposition pond, clean water basin, MBR membrane tank, filtration exchange device, retrieval and utilization bucket, first level RO filter and pure water pond and mud collecting tank, pretreatment equipment the equalizing basin sedimentation tank hydrolysis acidification tank anoxic tank contact good oxygen pond primary sedimentation tank redeposition pond clean water basin MBR membrane tank filtration exchange device retrieval and utilization bucket, first level RO filter and pure water pond connect gradually, the sedimentation tank primary sedimentation tank with redeposition pond all with the mud collecting tank is connected, the mud collecting tank is used for collecting silt.

Further, the device also comprises an advanced treatment device, wherein the advanced treatment device is arranged between the first-stage RO filter and the pure water tank and is used for collecting residual water discharged by the first-stage RO filter and concentrating, bursting oxygen and filtering the concentrated water.

Further, the advanced treatment apparatus includes an aeration oxidizer connected to the first stage RO filter and a second stage RO filter connected between the aeration oxidizer and the pure water tank.

Further, the sludge in the anoxic tank flows back to the hydrolytic acidification tank, the sludge in the primary sedimentation tank flows back to the contact aerobic tank, and the sludge-water mixture in the contact aerobic tank flows back to the anoxic tank; and the wastewater generated by the filtering and exchanging device and the RO filtering device (16) flows back to the regulating tank.

Further, a PH detector and a stirring device are arranged in the re-sedimentation tank.

Further, the sedimentation tank includes sedimentation tank, center pin, removes mud device and play mud pipe, the top of sedimentation tank is provided with the inlet tube, the lateral wall of sedimentation tank is provided with the outlet pipe, the center pin sets up the center of sedimentation tank, the center pin is the hollow shaft, remove mud device setting and be in on the center pin, and along the radial extension of bottom of the pool of sedimentation tank, and can be along the rotation of the bottom of the pool of sedimentation tank, can with the silt of the bottom of the pool of sedimentation tank is inhaled to in the center pin, play mud pipe sets up outside the sedimentation tank, and pass the bottom of sedimentation tank with the center pin intercommunication.

Further, the central shaft comprises a first shaft and a second shaft which are arranged at intervals and coaxially, the first shaft is fixedly communicated with the bottom of the sedimentation tank, the second shaft is positioned above the first shaft and is connected with the side wall of the sedimentation tank through a bracket, the mud removing device comprises a sleeve, a suction pipe, a rotary power source, a piston and a telescopic power source, the sleeve is connected between the first shaft and the second shaft, a mud inlet is formed in the side wall of the sleeve, a cover plate is arranged in the sleeve, the cover plate is covered on the mud inlet, the top of the cover plate is hinged with the inner wall of the sleeve, the piston is positioned in the second shaft, the telescopic power source is arranged in the telescopic power source, the piston is driven to approach or be far away from the mud inlet, an annular track is formed in the inner wall of the sedimentation tank, the rotary power source is arranged in the track and can slide down along the track, one end of the suction pipe is communicated with one end of the sleeve through the mud inlet, and the rotary power source is connected with the suction pipe along the suction holes;

the rotary power source comprises a mounting plate, a first rotary motor and a gear, wherein the mounting plate is clamped in the track and can slide along the track, the suction tube is connected with the mounting plate, teeth are circumferentially arranged on the inner wall of the track, the first rotary motor is mounted on the mounting plate, and the gear is arranged on a power output shaft of the first rotary motor and meshed with the teeth.

Further, the sedimentation tank further comprises a mud guard, the mud guard is sleeved on the central shaft and can move up and down along the central shaft, and the mud guard can be covered on mud at the bottom of the sedimentation tank.

Further, the fender includes support frame, filter plate, second rotating electrical machines, screw rod and guide bar, the cover that the support frame can slide is established on the center pin, the filter plate covers on the support frame, the second rotating electrical machines sets up the top of center pin, the screw rod sets up the power take off end of second rotating electrical machines, and with support frame threaded connection, the guide bar is connected on the center pin, and with center pin parallel arrangement, and can slide pass the support frame.

The invention also provides an industrial sewage treatment method, which comprises the following steps of:

firstly, removing large-particle impurities in sewage through pretreatment equipment;

after passing through the regulating tank, carrying out homogenization regulation on the water quality and the water quantity in the tank;

performing first precipitation by a precipitation tank; the sludge at the bottom of the sedimentation tank is collected by a sludge collecting tank and is treated by sludge pressing equipment;

introducing supernatant in the sedimentation tank into a hydrolytic acidification tank, and degrading and digesting soluble organic matters in the wastewater by facultative microorganisms in the wastewater through the hydrolytic acidification tank;

performing nitrification and denitrification through an anoxic tank;

the organic matters are decomposed into carbon dioxide, water and biological sludge by contacting with aerobic bacteria in an aerobic tank.

Performing secondary sedimentation through a primary sedimentation tank;

carrying out third precipitation by a re-precipitation tank, carrying out a reaction oxidation reaction on most metal ions, and converting the metal ions into precipitates;

obtaining clean water

Separating water molecules in the clear water through an MBR membrane pool, and further separating impurities;

removing harmful substances such as iron, manganese and arsenic in the clear water through a filtering and exchanging device;

isolating industrial heavy metals, bacteria and virus impurities in the clear water through a first-stage RO filter;

and the advanced treatment device is used for collecting the concentrated water discharged by the first-stage RO filter, concentrating, bursting oxygen and filtering the concentrated water, and recycling the concentrated water.

Compared with the prior art, the invention has the beneficial effects that:

on one hand, the invention can carry out biological treatment on sewage through the hydrolysis acidification tank, the anoxic tank and the contact aerobic tank, thereby removing or reducing organic matters in the sewage; on the other hand, the aeration oxidation device in the re-sedimentation tank can enable the metal ions in the sewage to undergo oxidation reaction and enable the products of the oxidation reaction of the metal ions to be converted and precipitated through the flocculating agent, so that the metal ions in the sewage are removed or reduced. Therefore, the invention can remove or reduce organic matters, inorganic matters and metal ions in the sewage generated in the surface treatment process of the hardware, and obtain clean water which can be reused in the surface treatment process of the hardware, thereby realizing zero emission of the industrial sewage, avoiding environmental pollution caused by directly discharging the sewage, and reutilizing the sewage after the sewage is treated, thereby improving the utilization rate of water resources.

Drawings

In order to more clearly illustrate the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described. Throughout the drawings, the elements or portions are not necessarily drawn to actual scale.

FIG. 1 is a schematic diagram of the overall structure of an industrial sewage treatment system and method according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a sedimentation tank in an industrial wastewater treatment system according to an embodiment of the present invention;

FIG. 3 is a schematic view of a rotational power source in an industrial wastewater treatment system according to an embodiment of the present invention;

reference numerals:

1. a pretreatment device; 2. an adjusting tank; 3. a sedimentation tank; 4. a hydrolytic acidification tank; 5. an anoxic tank; 6. contacting an aerobic tank; 7. a primary sedimentation tank; 8. re-depositing the pool; 9. a clean water tank; 10. an MBR membrane pool; 11. a filtering and exchanging device; 12. recycling barrels; 13. a first stage RO filtration device; 14. a pure water tank; 15. a sludge collection tank; 16. a depth processing device; 161. an aeration oxidizer; 162. a second stage RO filter; 17. a dosing device; 18. an emergency pool.

31. A sedimentation tank; 311. a mud guard; 3111. a support frame; 3112. a filter plate; 3113. a second rotating electric machine; 3114. a screw; 3115. a guide rod; 32. a central shaft; 321. a first shaft; 322. a second shaft; 33. a mud removing device; 331. a sleeve; 3311. a cover plate; 332. a suction tube; 333. a rotary power source; 3331. a mounting plate; 3332. a first rotating electric machine; 3333. a gear; 334. a piston; 335. a telescopic power source 34 and a mud outlet pipe.

Detailed Description

Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

As shown in fig. 1 to 3, an embodiment of the present invention provides an industrial sewage treatment system, which comprises a pretreatment device 1, a regulating tank 2, a sedimentation tank 3, a hydrolytic acidification tank 4, an anoxic tank 5, a contact aerobic tank 6, a primary sedimentation tank 7, a secondary sedimentation tank 8, a clean water tank 9, an MBR membrane tank 10, a filter exchange device 11, a recycling tank 12, a first-stage RO filter 13, a pure water tank 14 and a sludge collection tank 15. The pretreatment equipment 1, the regulating tank 2, the sedimentation tank 3, the hydrolytic acidification tank 4, the anoxic tank 5, the contact aerobic tank 6, the primary sedimentation tank 7, the secondary sedimentation tank 8, the clean water tank 9, the MBR membrane tank 10, the filter exchange device 11, the recycling barrel 12, the first-stage RO filter 13 and the pure water tank 14 are sequentially connected. The sedimentation tank 3, the primary sedimentation tank 7 and the secondary sedimentation tank 8 are all connected with a sludge collecting tank 15, and the sludge collecting tank 15 is used for collecting sludge.

Wherein the pretreatment device 1 is capable of removing large particle impurities in sewage. In particular, the pretreatment device 1 is a grille. Of course, in other embodiments, other existing equipment may be used as long as the equipment is capable of removing large particulate matter from the wastewater.

The regulating tank 2 is used for carrying out homogenization regulation on the water quality and the water quantity of sewage so as to ensure that the subsequent process can be carried out under the condition of stable water quality and water quantity, and the emergency tank 18 can be connected to the regulating tank 2 when the process is implemented. The emergency pool 18 can temporarily collect and store sewage when equipment failure occurs, and prevent the sewage from overflowing to cause environmental pollution, thereby further improving the working reliability of the embodiment of the invention.

The sedimentation tank 3 can convert and sediment part of pollutants in sewage through a flocculating agent and carry out mud-water separation. Further, a flocculation device (not shown in the figure) is arranged between the regulating tank 2 and the sedimentation tank 3. In the embodiment, the flocculation device is arranged between the regulating tank 2 and the sedimentation tank 3, so that the sewage can be ensured to perform flocculation reaction smoothly.

The hydrolysis acidification tank 4, the anoxic tank 5 and the contact aerobic tank 6 are used for biological treatment of sewage, so that organic matters in the sewage are degraded.

The primary sedimentation tank 7 is used for separating sludge from sewage after biological treatment, clarifying, concentrating and refluxing the activated sludge in the mixed solution. The re-sedimentation tank 8 can oxidize metal ions in the sewage through an aeration oxidation device and convert and sediment products of the oxidation reaction of the metal ions through a flocculating agent. Preferably, a PH detector is also arranged in the re-sedimentation tank 8. The PH monitor can monitor the PH value of the sewage in the re-sedimentation tank 8, so that operators can adjust the PH value of the sewage to be suitable for aeration oxidation according to the monitoring result. In the concrete implementation, the aeration effect can be increased by stirring in the overexposure process.

The sewage is treated by the pretreatment equipment 1, the regulating tank 2, the sedimentation tank 3, the hydrolytic acidification tank 4, the anoxic tank 5, the contact aerobic tank 6, the primary sedimentation tank 7 and the secondary sedimentation tank 8, and then enters the clean water tank 9, so that the sewage can be used for common non-drinking daily water such as irrigation, washing and the like.

The MBR membrane tank 10 and the filter exchange device 11 are used for filtering the treated sewage. The sludge collecting tank 15 is used for collecting the sludge of the sedimentation tank 3, the primary sedimentation tank 7 and the secondary sedimentation tank 8 and carrying out centralized treatment by mud equipment such as a mud pressing machine.

The pretreatment apparatus 1, the adjusting tank 2, the sedimentation tank 3, the hydrolytic acidification tank 4, the anoxic tank 5, the contact aerobic tank 6, the primary sedimentation tank 7, the secondary sedimentation tank 8, the MBR membrane tank 10, the filtration exchange device 11, the clean water tank 9, the pure water tank 14, and the sludge collection tank 15 may be connected by pipes or other means, which is not limited in this embodiment.

On one hand, the embodiment of the invention can carry out biological treatment on sewage through the hydrolysis acidification tank 4, the anoxic tank 5 and the contact aerobic tank 6, thereby removing or reducing organic matters in the sewage; on the other hand, the metal ions in the sewage can be oxidized and precipitated by the aeration oxidation device in the re-sedimentation tank 8, and the products of the oxidation reaction of the metal ions are converted and precipitated by the flocculating agent, so that the metal ions in the sewage are removed or reduced. Therefore, the embodiment of the invention can remove or reduce organic matters and metal ions in the sewage generated in the surface treatment process of the hardware, and obtain clean water which can be reused in the surface treatment process of the hardware, and the invention can avoid environmental pollution caused by directly discharging the sewage.

In this embodiment, the MBR membrane tank 10 is used for treating sewage by utilizing the permeability of water molecules in an aqueous solution, and separating water molecules in the sewage by utilizing a separation membrane of an MBR membrane technology, so that the passing of substances is kept unchanged, and under the action of external force, a penetrating fluid can act, and solutes and other impurities can be separated, so that purified water is extracted, the purposes of sewage treatment and water quality improvement are achieved, and the environment is better protected.

In this embodiment, the filter exchange device 11 includes a manganese sand filter, an activated carbon filter, and a cation exchange resin. The manganese sand filter can remove suspended substances and solid particles in water, so as to remove harmful substances such as iron, manganese, arsenic and the like in the water; the activated carbon filter can adsorb micro-substances in water; the cation exchange resin can exchange one active ion with one ion in water when meeting water, namely, a displacement reaction is carried out, and soluble ions in water are removed.

The wastewater generated by the MBR membrane tank 10 and the filtering and exchanging device 11 in this embodiment can flow back to the regulating tank 2 and be collected into the tank to be treated later together with the wastewater, so that the wastewater generated by the MBR membrane tank 10 and the filtering and exchanging device 11 can be treated, and environmental pollution is avoided.

It should be noted that in other embodiments, other types of devices may be used as the filtering exchange device.

In this embodiment, the sludge in the anoxic tank 5 may be returned to the hydrolytic acidification tank 4, and the sludge in the primary sedimentation tank 7 may be returned to the contact aerobic tank 6. Allowing the sludge of the anoxic tank 5 to flow back to the hydrolysis acidification tank 4 can keep the sludge concentration and quantity in the hydrolysis acidification tank 4 stable. Similarly, the sludge in the primary sedimentation tank 7 can flow back to the contact aerobic tank 6, so that the concentration and the quantity of the sludge in the contact aerobic tank 6 can be kept stable. It is understood that the embodiment can realize sludge reflux by arranging a reflux pipeline, a mud pump and the like between the bottom of the anoxic tank 5 and the bottom of the hydrolytic acidification tank 4 and between the bottom of the contact aerobic tank 6 and the bottom of the primary sedimentation tank 7.

Further, the mud-water mixture in the contact aerobic tank 6 can flow back to the anoxic tank 5. The embodiment enables the mud-water mixture in the contact aerobic tank 6 to flow back into the anoxic tank 5, on one hand, helps to maintain the concentration and quantity of sludge in the anoxic tank 5 stable, and on the other hand, enables the dissolved oxygen content in the anoxic tank 5 to be properly supplemented so as to maintain the dissolved oxygen in the anoxic tank 5 stable, thereby enabling the microorganisms in the anoxic tank 5 to perform nitrification and denitrification under proper conditions.

It should be noted that, in this embodiment, the mud-water mixture may be refluxed by providing a reflux pipeline, a water pump, and the like between the contact aerobic tank 6 and the anoxic tank 5.

Preferably, a dissolved oxygen detector and an ORP detector are respectively arranged in the anoxic tank 5 and the contact aerobic tank 6. The dissolved oxygen detector can monitor the dissolved oxygen content of the anoxic tank 5 and the contact aerobic tank 6, so that an operator can adjust the dissolved oxygen content of the anoxic tank 5 and the contact aerobic tank 6 according to a monitoring result, and microorganisms in the anoxic tank 5 and the contact aerobic tank 6 can perform biological action under proper conditions; ORP monitors are used to monitor the redox potential in the wastewater, reflecting the macroscopic redox properties exhibited by all materials in the wastewater.

As shown in fig. 1, the industrial sewage treatment system may further comprise a dosing device 17. The dosing device 17 is used for adding medicines such as PH regulator, flocculant and the like into the sedimentation tank 3, the contact aerobic tank 6 and the re-sedimentation tank 8.

It should be understood that the chemical adding device 17 may be a conventional chemical adding device 17 in the prior art, and it should be noted that the flocculation device may be a flocculation reactor or a flocculation reaction tank, which is not limited in this embodiment.

In the present embodiment, as shown in fig. 1, the liquid subjected to the filtration and exchange treatment enters the recycling bin 12. The water return barrel is provided with a conductivity detector which can detect conductivity and is used for controlling water quality. In addition, the liquid in the recycling bin 12 can be led out for recycling by a vibration polishing machine.

Preferably, the industrial sewage treatment system comprises an advanced treatment device 16, wherein the advanced treatment device 16 is arranged between the first-stage RO filter 13 and the pure water tank 14 and is used for collecting the concentrated water discharged by the first-stage RO filter 13 and concentrating, oxygen blasting and filtering the concentrated water.

Specifically, the advanced treatment apparatus 16 includes an aeration oxidizer 161 and a second RO filter 162, the aeration oxidizer 161 being connected to the first RO filter 13, and the second RO filter 162 being connected between the aeration oxidizer 161 and the pure water tank 14.

It will be appreciated that the liquid treated by the first RO filter 13 flows into the aeration oxidizer 161, is aerated by the aeration oxidizer 161, and then enters the second RO filter 162 to be filtered again, and the liquid filtered by the second RO filter 162 finally flows into the pure water tank 14, so that the liquid can be directly used for drinking, dispensing, etc.

In the present embodiment, the sedimentation tank 3 includes a sedimentation tank 31, a central shaft 32, a desliming device 33, and a sludge outlet pipe 34. The top of sedimentation tank 31 is provided with the inlet tube, and the lateral wall of sedimentation tank 31 is provided with the outlet pipe, and center pin 32 setting is at the center of sedimentation tank 31, and center pin 32 is the hollow shaft, and mud removing device 33 sets up on center pin 32 to radially extend along the bottom of the pool of sedimentation tank 31, and can follow the rotation of the bottom of the pool of sedimentation tank 31, can attract the silt of the bottom of the pool of sedimentation tank 31 to center pin 32 in, and play mud pipe 34 sets up outside sedimentation tank 31 to pass the bottom of sedimentation tank 31 and center pin 32 intercommunication.

When the sedimentation tank 3 is used, the mud at the bottom of the sedimentation tank 31 is directly sucked into the central shaft 32 through the mud removing device 33, so that the mud removing effect is improved.

Specifically, the central shaft 32 includes a first shaft 321 and a second shaft 322 that are spaced apart and coaxially disposed. The first shaft 321 is fixedly communicated with the bottom of the sedimentation tank 31, the second shaft 322 is positioned above the first shaft 321 and is connected with the side wall of the sedimentation tank 31 through a bracket, the mud removing device 33 comprises a sleeve 331, a suction pipe 332, a rotary power source 333, a piston 334 and a telescopic power source 335, the sleeve 331 is connected between the first shaft 321 and the second shaft 322, a mud inlet is formed in the side wall of the sleeve 331, a cover plate 3311 is arranged in the sleeve 331, the cover plate 3311 covers the mud inlet, the top of the cover plate 3311 is hinged with the inner wall of the sleeve 331, the piston 334 is positioned in the second shaft 322, the telescopic power source 335 is arranged in the telescopic power source 335, the telescopic power source 335 is used for driving the piston 334 to approach or separate from the mud inlet, an annular track is formed in the inner wall of the sedimentation tank 31, the rotary power source 333 is arranged in the track and can slide down along the track, one end of the suction pipe 332 is communicated with the sleeve 331 through the mud inlet, the other end of the suction pipe 332 is connected with the rotary power source 333, and a plurality of suction holes are formed in the suction pipe 332 along the track;

the rotary power source 333 includes a mounting plate 3331, a first rotary electric machine 3332, and a gear 3333. The mounting plate 3331 is clamped in the track and can slide along the track, the suction tube 332 is connected with the mounting, teeth are circumferentially arranged on the inner wall of the track, the first rotating motor 3332 is mounted on the mounting plate 3331, and the gear 3333 is arranged on the power output shaft of the first rotating motor 3332 and meshed with the teeth.

When the mud is driven, the rotary power source 333 and the telescopic power source 335 are started, the rotary power source 333 drives the suction tube 332 to rotate around the central shaft 32, the telescopic power source 335 drives the piston 334 to move up and down on the second shaft 322, the mud is sucked into the suction tube 332 from the suction hole, enters the second shaft 322 from the mud inlet, is injected into the mud outlet tube 34 from the second shaft 322, and is discharged from the mud outlet tube 34.

The pumping of the sludge through the piston 334 is not only efficient, but also prevents the clogging of the pipeline with the sludge, thereby further improving efficiency.

As a more preferred embodiment, the sedimentation tank 3 further comprises a mudguard 311. The mud guard 311 is sleeved on the central shaft 32 and can move up and down along the central shaft 32, and the mud guard 311 can be covered on the mud at the bottom of the sedimentation tank 31.

When the device is used, clear water and silt can be separated through the mud guard 311, so that the silt and the clear water can be prevented from being mixed secondarily after layering, and the precipitation effect is improved. Meanwhile, in the sludge cleaning process, the sludge can be prevented from randomly flowing into clear water.

Specifically, the mud guard 311 includes a support frame 3111, a filter plate 3112, a second rotating motor 3113, a screw 3116 and a guide rod 3115, where the support frame 3111 is slidably sleeved on the central shaft 32, the filter plate 3112 covers the support frame 3111, the second rotating motor 3113 is disposed at a top end of the central shaft 32, the screw rod 3115 is disposed at a power output end of the second rotating motor 3113 and is in threaded connection with the support frame 3111, and the guide rod 3115 is connected to the central shaft 32 and is parallel to the central shaft 32 and slidably penetrates the support frame 3111.

In use, the filter plate 3112 is driven to the top of the sedimentation tank 31 by the screw 3115 and the guide rod 3115 via the second rotary motor 3113, and the sewage discharged from the sedimentation tank 2 flows into the sedimentation tank 31 via the filter plate 3112, and at this time, the filter plate 3112 starts the filtration. The larger grounds may be filtered again.

In a specific implementation, the filter plate 3112 may be divided into a plurality of small filter screens, and the small filter screens may be connected to the support 3111 by an opening/closing device, and in use, the filter screens may be opened or closed by the opening/closing device according to circumstances. If the mud guard 311 is positioned at the top of the sedimentation tank 31 in a normal state, after the sedimentation is completed, all the filter screens are turned to a vertical state by the opening and closing mechanism, the mud guard 311 can be driven to be above the mud and cover the mud again by the second rotating motor 3113, then the filter screens are turned to a horizontal state by the opening and closing mechanism, clean water and the mud can be separated, and the operations of draining the clean water and draining the mud can be performed. In addition, when the filter screen is found to be blocked, the filter screen can be dredged by turning over the filter screen. Thus, the mud guard 311 can realize filtering and blocking functions. The opening and closing mechanism can be a starting mechanism matched with a gear 3333 rack commonly used in daily life.

The invention provides an industrial sewage treatment method, which adopts the industrial sewage treatment system and comprises the following steps:

s110, removing large-particle impurities in the sewage through the pretreatment equipment 1;

specifically, the sewage firstly flows through the pretreatment equipment 1 to remove large particle impurities in the sewage, and then enters the regulating tank 2.

S120, carrying out homogenization adjustment on water quality and water quantity through an adjusting tank 2;

specifically, after the sewage enters the regulating tank 2, the homogenization regulation of the water quality and the water quantity is carried out in the tank so that the subsequent treatment process can be operated under the condition of stable water quality and water quantity.

S130, introducing sewage into a sedimentation tank 3 for primary sedimentation; the sludge at the bottom of the sedimentation tank 3 is collected by a sludge collecting tank 15 and is treated by sludge pressing equipment;

specifically, before sewage enters the sedimentation tank 3, PH regulator and flocculant are added into the sewage to enable pollutants in the sewage to react, after the reaction is completed, the sewage stands in the sedimentation tank 3 to complete mud-water separation, wherein supernatant fluid flows into the hydrolysis acidification tank 4 to be processed in the next step, and sludge at the bottom is collected by the sludge collection tank 15 and is processed by sludge pressing equipment.

S140, introducing the supernatant in the sedimentation tank 3 into a hydrolytic acidification tank 4, and degrading and digesting soluble organic matters in the wastewater by facultative microorganisms in the wastewater through the hydrolytic acidification tank 4;

specifically, after sewage enters the hydrolytic acidification tank 4, facultative microorganisms in the tank degrade and digest soluble organic matters in the sewage, and decompose macromolecular organic matters into micromolecular matters, thereby improving the biochemistry of the sewage.

S150, performing nitrification and denitrification through the anoxic tank 5;

specifically, sewage flows into the anoxic tank 5 after the hydrolysis acidification tank 4 finishes treatment, microorganisms in the anoxic tank 5 perform nitrification and denitrification, denitrifying bacteria in the tank take carbon-containing organic matters which are not decomposed in the sewage as carbon sources, and nitrate nitrogen flowing in the aerobic tank through internal circulation is reduced to N2 for release. The anoxic tank 5 has a hydrolysis reaction, and its pH value is raised in the denitrification process. In the denitrification process, the denitrification process mainly plays a role in removing nitrate nitrogen, and simultaneously removes part of BOD, and has the function of improving the biodegradability through hydrolysis reaction, so that the biodegradability of the wastewater is further improved;

s160, decomposing organic matters into carbon dioxide, water and biological sludge by contacting aerobic bacteria in the aerobic tank 6;

specifically, the sewage flows into the contact aerobic tank 6 after the anoxic tank 5 finishes treatment, a large amount of aerobic bacteria are attached to the filler in the contact aerobic tank 6, and the aerobic bacteria perform nitrification and denitrification by taking organic matters in the sewage as metabolic nutrient substances, and finally decompose the organic matters into carbon dioxide, water and biological sludge.

S170, performing secondary sedimentation through a primary sedimentation tank 317;

specifically, the sewage flows into the primary sedimentation tank 317 after being treated by the aerobic tank 6, and a flocculating agent is added into the sewage before the sewage flows into the primary sedimentation tank 317 so that the pollutants in the sewage undergo a flocculation reaction, and the sewage enters the primary sedimentation tank 317 to finish mud-water separation in the tank.

S180, carrying out third precipitation through a re-precipitation tank 318, carrying out a counter oxidation reaction on most metal ions, and converting the metal ions into precipitates;

specifically, the supernatant in the primary sedimentation tank 317 flows into the secondary sedimentation tank 318 for third sedimentation, and the sludge at the bottom is collected by the sludge collection tank 15 and is treated by sludge pressing equipment;

s190, obtaining clear water;

specifically, the clean water in the re-sedimentation tank 318 is introduced into the clean water tank.

S200, separating water molecules in the clean water through the MBR membrane tank 10, and further separating impurities

Specifically, the clear water flows through the MBR membrane 9, and the water molecules in the sewage can be separated by using the separation membrane of the MBR membrane 9 technology, so that the passing of substances is kept unchanged, and under the action of external force, the penetrating fluid can act, so that solutes and other impurities can be separated.

S210, removing harmful substances such as iron, manganese, arsenic and the like in the clean water through a filtering and exchanging device 11;

specifically, the pretreatment of suspended substances and solid particles in water is removed by the filter exchange device 11. Thereby removing harmful substances such as iron, manganese, arsenic and the like in the water. The exchange device is mainly used for softening hard water, desalting water and purifying rare element antibiotics by adopting cation exchange resin;

s220, isolating impurities such as heavy metals, bacteria and viruses in the clear water through the first-stage RO filter 13;

specifically, the filter exchange device 11 is used for completely isolating a large amount of impurities such as industrial pollutants, heavy metals, bacteria, viruses and the like which are mixed into water, so that the effect of purified water is achieved, and the purified water is produced.

And S220, collecting the concentrated water discharged from the first-stage RO filter 13 through the advanced treatment device 16, concentrating, blasting oxygen and filtering the concentrated water, and recycling the concentrated water.

Specifically, the advanced treatment device 16 is used for collecting the residual water discharged from the first-stage RO filter 13, concentrating, bursting oxygen and filtering the residual water, and reusing the residual water. In the process of the advanced treatment apparatus 16, it is necessary to perform aeration again through the aeration oxidizer 161 and filtration again through the RO filter through the second-stage RO filter 162, thereby achieving the purpose of advanced treatment.

By adopting the industrial sewage treatment system and the industrial sewage treatment method, organic matters, inorganic matters and metal ions in sewage generated in the surface treatment process of hardware can be effectively removed or reduced, and clear water which can be reused in the surface treatment process of the hardware is obtained, so that the industrial sewage can be discharged 0, environmental pollution caused by directly discharging the sewage can be avoided, and the sewage can be reused after being treated, so that the utilization rate of water resources is improved.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is two or more unless specifically defined otherwise.

The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.

Claims (6)

1. The industrial sewage treatment system is characterized by comprising pretreatment equipment, a regulating tank, a sedimentation tank, a hydrolytic acidification tank, an anoxic tank, a contact aerobic tank, a primary sedimentation tank, a secondary sedimentation tank, a clean water tank, an MBR membrane tank, a filter exchange device, a recycling barrel, a first-stage RO filter, a pure water tank and a sludge collection tank, wherein the pretreatment equipment, the regulating tank, the sedimentation tank, the hydrolytic acidification tank, the anoxic tank, the contact aerobic tank, the primary sedimentation tank, the secondary sedimentation tank, the clean water tank, the MBR membrane tank, the filter exchange device recycling barrel, the first-stage RO filter and the pure water tank are sequentially connected, and the sedimentation tank, the primary sedimentation tank and the secondary sedimentation tank are all connected with the sludge collection tank which is used for collecting sludge;

the sedimentation tank comprises a sedimentation tank, a central shaft, a mud removing device and a mud outlet pipe, wherein the top of the sedimentation tank is provided with a water inlet pipe, the side wall of the sedimentation tank is provided with a water outlet pipe, the central shaft is arranged at the center of the sedimentation tank, the central shaft is a hollow shaft, the mud removing device is arranged on the central shaft and radially extends along the bottom of the sedimentation tank and can attract mud at the bottom of the sedimentation tank into the central shaft along the rotation of the bottom of the sedimentation tank, and the mud outlet pipe is arranged outside the sedimentation tank and passes through the bottom of the sedimentation tank to be communicated with the central shaft;

the sedimentation tank further comprises a mud guard, the mud guard is sleeved on the central shaft and can move up and down along the central shaft, and the mud guard can be covered on mud at the bottom of the sedimentation tank;

the mud removing device comprises a sleeve, a suction pipe, a rotary power source, a piston and a telescopic power source, wherein the sleeve is connected between the first shaft and the second shaft, a mud inlet is formed in the side wall of the sleeve, a cover plate is arranged in the sleeve, the cover plate covers the mud inlet, the top of the cover plate is hinged with the inner wall of the sleeve, the piston is positioned in the second shaft, the telescopic power source is arranged in the telescopic power source, the telescopic power source is used for driving the piston to approach or depart from the mud inlet, an annular track is formed in the inner wall of the sedimentation tank, the rotary power source is arranged in the track and can slide along the track, one end of the suction pipe is communicated with the sleeve through the mud inlet, and the rotary power source is connected with the suction pipe along the suction holes;

the rotary power source comprises a mounting plate, a first rotary motor and a gear, wherein the mounting plate is clamped in the track and can slide along the track, the suction pipe is connected with the mounting plate, teeth are circumferentially arranged on the inner wall of the track, the first rotary motor is mounted on the mounting plate, and the gear is arranged on a power output shaft of the first rotary motor and meshed with the teeth;

the mud guard comprises a support frame, a filter plate, a second rotating motor, a screw rod and a guide rod, wherein the support frame can be sleeved on a central shaft in a sliding mode, the filter plate is covered on the support frame, the second rotating motor is arranged at the top end of the central shaft, the screw rod is arranged at the power output end of the second rotating motor and is in threaded connection with the support frame, and the guide rod is connected on the central shaft, is parallel to the central shaft and can pass through the support frame in a sliding mode.

2. The industrial wastewater treatment system of claim 1, further comprising an advanced treatment device disposed between the first stage RO filter and the pure water tank for collecting and concentrating, bursting and filtering the residual water discharged from the first stage RO filter.

3. The industrial wastewater treatment system of claim 2, wherein the advanced treatment device comprises an aeration oxidizer and a second stage RO filter, the aeration oxidizer being coupled to the second stage RO filter, the second stage RO filter being coupled between the second stage RO filter and the pure water tank.

4. The industrial wastewater treatment system of claim 1, wherein sludge from the anoxic tank is returned to the hydrolytic acidification tank, sludge from the primary sedimentation tank is returned to the contact aerobic tank, and sludge-water mixture from the contact aerobic tank is returned to the anoxic tank; and the wastewater generated by the filtering and exchanging device and the RO filtering device (16) flows back to the regulating tank.

5. The industrial wastewater treatment system of claim 1, wherein a PH detector and a stirring device are disposed in the re-sedimentation tank.

6. A method of treating industrial sewage using the industrial sewage treatment system according to any one of claims 1 to 5, comprising:

firstly, removing large-particle impurities in sewage through pretreatment equipment;

after passing through the regulating tank, carrying out homogenization regulation on the water quality and the water quantity in the tank;

performing first precipitation by a precipitation tank; the sludge at the bottom of the sedimentation tank is collected by a sludge collecting tank and is treated by sludge pressing equipment;

introducing supernatant in the sedimentation tank into a hydrolytic acidification tank, and degrading and digesting soluble organic matters in the wastewater by facultative microorganisms in the wastewater through the hydrolytic acidification tank;

performing nitrification and denitrification through an anoxic tank;

decomposing organic matters into carbon dioxide, water and biological sludge by contacting aerobic bacteria in an aerobic tank;

performing secondary sedimentation through a primary sedimentation tank;

carrying out third precipitation by a re-precipitation tank, carrying out a reaction oxidation reaction on most metal ions, and converting the metal ions into precipitates;

clear water is obtained;

separating water molecules in the clear water through an MBR membrane pool, and further separating impurities;

removing harmful substances such as iron, manganese and arsenic in the clear water through a filtering and exchanging device;

isolating industrial heavy metals, bacteria and virus impurities in the clear water through a first-stage RO filter;

and the advanced treatment device is used for collecting the concentrated water discharged by the first-stage RO filter, concentrating, bursting oxygen and filtering the concentrated water, and recycling the concentrated water.