CN112678941B - Heavy metal sewage treatment equipment and process for breaking collaterals by using ozone - Google Patents
Heavy metal sewage treatment equipment and process for breaking collaterals by using ozone Download PDFInfo
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- CN112678941B CN112678941B CN202011327140.1A CN202011327140A CN112678941B CN 112678941 B CN112678941 B CN 112678941B CN 202011327140 A CN202011327140 A CN 202011327140A CN 112678941 B CN112678941 B CN 112678941B
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Abstract
The utility model provides an utilize heavy metal sewage treatment device of ozone broken twine, this application sewage is led to sewage pump water inlet, sewage pump drain pipe passes through the sludge pipe and the fluidized bed reactor of magnetic separator two is connected, there is the tail gas export fluidized bed reactor upper portion, fluidized bed reactor upper portion sewage outlet connects the outlet pipe to connect two tops of magnetic separator, the fluidized bed reactor bottom has ozone to link to each other, two drain pipes of magnetic separator are connected with the ferrite reactor and corresponding pipeline has the calcium hydrate inlet port, magnetism mud entry and ferrite salt entry, the ferrite reactor passes through the pipeline and links to each other with a magnetic separator top and measuring pump water inlet, potassium permanganate preparation case passes through the pipeline and links to each other with catalyst reation kettle, the measuring pump delivery port links to each other with catalyst reation kettle, there is the discharge port bottom up to standard of sewage at a magnetic separator top to have the pipeline to connect ageing reactor. The invention has obvious effect of breaking the collaterals, simple structure of the magnetic separator, high surface load and high water quality of discharged water.
Description
Technical Field
The invention relates to the field of heavy metal sewage treatment processes, in particular to heavy metal sewage treatment equipment and a heavy metal sewage treatment process for breaking collaterals by using ozone.
Background
Many heavy metal ions in the sewage discharged by the electroplating industry are in a complex state, the complex heavy metal has stable performance and high water solubility, and the complex heavy metal ions are difficult to remove by a conventional methodIn addition, the complex structure is usually broken and then heavy metal treatment is carried out. The structure of organic matters in the complex is generally destroyed by a substance with strong oxidizing property, and common methods for breaking the complex include sodium hypochlorite, Fenton method and ozone. The sodium hypochlorite method requires addition of chloride to the wastewater, and has a large amount of chloride added and high cost. The fenton process requires the control of the pH of the wastewater within the reaction range, has low oxidation efficiency and produces a large amount of iron sludge. Ozone oxidation has two modes, one is to utilize the self-oxidizing property of ozone, but the ozone oxidation capacity is limited, and the other is to generate hydroxyl free radicals under the catalysis of a catalyst, so that the strong oxidizing hydroxyl free radicals decompose a complex. The metal oxide is a common ozone catalyst, MnO 2 Is one of the common ozone catalysts. New prepared MnO 2 High activity and better ozone catalyzing ability.
After complex breaking of the complex-state heavy metal is completed, subsequent heavy metal treatment is required so that the sewage can reach the discharge standard. The ferrite precipitation method is a common heavy metal treatment process, can reach higher discharge standard, and the sludge has magnetism. MnO of core-shell structure prepared by using magnetic sludge on site 2 The catalyst has simple preparation process and magnetism and is convenient to separate. The magnetic catalyst and the magnetic sludge can be quickly separated by using a magnetic field, but the existing magnetic separation equipment has a complex structure.
Disclosure of Invention
In order to solve the problems, the invention provides heavy metal sewage treatment equipment and a process for breaking the complex by using ozone, wherein a magnetic adsorbing material generated by subsequent reaction is used for preparing a magnetic catalyst, the ozone, the catalyst and the sewage in a fluidized bed are uniformly mixed, the complex breaking effect is obvious, the magnetic catalyst is convenient to separate, and a magnetic separator has a simple structure, is convenient to manufacture and has a higher separation effect, so that the heavy metal sewage treatment equipment for breaking the complex by using ozone comprises a medicament box, a catalyst reaction kettle, a metering pump, a ferrite reactor, a fluidized bed reactor, a sewage pump, an aging reactor, a first magnetic separator and a second magnetic separator, wherein the water inlet of the sewage pump is communicated with the sewage, the sewage pump is connected with the fluidized bed through a sludge pipe of the second magnetic separator, the upper part of the fluidized bed reactor is provided with a tail gas outlet, the device comprises a fluidized bed reactor, a ferrite reactor, a reagent box, a metering pump, a sewage discharge port, a pipeline, an aging reactor, a water outlet pipe, a water inlet pipe, a magnetic sludge inlet, a ferrite reactor, a pipeline, a magnetic sludge inlet, a ferrous salt inlet, a pipeline, a reagent box, a catalyst reaction kettle, a reagent box, a pipeline and a pipeline, wherein the sewage outlet at the upper part of the fluidized bed reactor is connected with the top of the magnetic separator, the pipeline is connected with the aging reactor at the bottom of the sewage discharge port which reaches the standard, and the aging reactor is provided with a magnetic sludge discharge port and a recycling port.
As the further improvement of the structure of the application, the magnetic separator I is formed by arranging at least two separator units side by side, each separator unit comprises a water inlet pipe, a sedimentation pipe, a reflecting plate, a permanent magnet, a sludge pipe and a circular arc scraping rod, the water inlet pipe is arranged in the square sedimentation pipe, one side of the upper part of the sedimentation pipe is provided with a water outlet, the bottom end of the water inlet pipe is provided with the reflecting plate, the lower end of the sedimentation pipe is inserted into the circular sludge pipe, the inner wall of the bottom of the sludge pipe is provided with the circular arc scraping rod which is adsorbed on the inner wall to scrape magnetic sludge, the outer wall of the bottom of the sludge pipe is provided with the permanent magnet, the center of the upper part of the magnetic separator is provided with a cylindrical water inlet pipe, the lower part of the water inlet pipe is provided with the reflecting plate, the outer side of the square sedimentation pipe is connected with the sludge pipe, the sludge pipe is circular, the outer wall of the sludge pipe is provided with the permanent magnet, and the circular arc scraping rod is arranged in the sludge pipe, can reciprocate, the magnetic sludge adsorbed on the inner wall is strongly scraped, sewage and magnetic substances enter from the top to the bottom of the middle sedimentation pipe, the sewage flows upwards after passing through the reflecting plate, the magnetic sludge is rapidly sedimentated downwards under the action of gravity and magnetism, the first magnetic separator sends the sludge into the aging reactor through a sludge pump, and the sludge is converted into Fe with stable performance in the aging reactor 3 O 4 。
As the further improvement of the structure of the application, the two magnetic separators include inlet tube, sedimentation tube, reflecting plate, sedimentation plate, permanent magnet and sludge pipe, the inlet tube sets up in square sedimentation tube, there is the delivery port on one side of sedimentation tube upper portion, there is the reflecting plate inlet tube bottom, the circular shape sludge pipe is inserted to the sedimentation tube lower extreme, there is the sedimentation plate of non-magnetic material preparation sedimentation tube lower part, sedimentation plate one side articulates on the sedimentation tube, corresponds the free switching of sedimentation plate opposite side, the permanent magnet has been laid to sludge pipe bottom outer wall, and two upper portion central authorities of magnetic separator are cylinder type inlet tube, and the inlet tube lower part has the reflecting plate, and the outside is square sedimentation tube, and the sedimentation tube lower part has the sedimentation plate of non-magnetic material preparation, and sedimentation plate one side articulates on the sedimentation tube, corresponds the free switching of opposite side, and sedimentation tube and sludge union coupling, sludge pipe are circular, the outer wall of the sludge pipe is provided with a permanent magnet, two ends of the sludge pipe are connected with a water inlet pipeline, the settling plate is in a closed state under the action of sewage pressure, a catalyst and sewage flowing out of the fluidized bed reactor enter the magnetic separator II from top to bottom from the middle settling pipe, the sewage flows upwards after passing through the reflecting plate, the magnetic catalyst is rapidly settled downwards under the action of gravity and magnetism, the catalyst is settled on the settling plate, the larger the catalyst accumulation amount is, the larger the received magnetic force is, and when the magnetic force is greater than the water pressure, the settling plate is opened, the catalyst flows downwards and is brought into the fluidized bed by the sewage for recycling, and the settling plate is subjected to downward acting force and is reduced and closed again.
As the structure of the utility model is further improved, the length of the settling plate is larger than that of the settling pipe, so that the sewage can be prevented from pushing the bottom settling plate to be opened upwards.
The invention provides a heavy metal sewage treatment process for breaking up collaterals by using ozone, which comprises the following specific steps:
heavy metal sewage containing a complex is mixed with a magnetic catalyst and then enters from the bottom of a fluidized bed reactor, ozone is introduced from the bottom of the fluidized bed reactor, gas, liquid and solid phases flow upwards, the ozone and hydroxyl radicals generated by catalysis destroy the complex structure of the sewage under the action of the catalyst, the complex heavy metal is converted into a free state, and the sewage flows out from the side edge of the upper part of the fluidized bed reactor and enters a magnetic separator II;
the center of the upper part of the second magnetic separator is provided with a cylindrical water inlet pipe, the lower part of the water inlet pipe is provided with a reflecting plate, the outer side of the lower part of the precipitating pipe is provided with a precipitating plate made of a non-magnetic material, one side of the precipitating plate is hinged on the precipitating pipe and is freely opened and closed corresponding to the other side of the precipitating pipe, the precipitating pipe is connected with a sludge pipe, the sludge pipe is round, the outer wall of the sludge pipe is provided with a permanent magnet, two ends of the sludge pipe are connected with a water inlet pipeline, the precipitating plate is in a closed state under the action of sewage pressure, a catalyst and sewage flowing out of the fluidized bed reactor enter the second magnetic separator from the middle precipitating pipe from top to bottom, the sewage flows upwards after passing through the reflecting plate, the magnetic catalyst rapidly precipitates downwards under the action of gravity and magnetism, the catalyst is deposited on the precipitating plate, the larger the accumulated amount of the catalyst is, the larger the received magnetic force is, when the magnetic force is larger than the water pressure, the precipitating plate is opened, the catalyst flows downwards, the sewage is brought into the fluidized bed for recycling, and the settling plate is reduced by downward acting force and is closed again;
the sewage after the second separation of the magnetic separator and the broken collaterals flows into a ferrite reactor, and ferrous salt and backflow magnetic sludge Fe are added on a sewage pipeline according to the measurement 3 O 4 By Ca (OH) 2 The PH value is adjusted, sewage gets into the ferrite reactor and fully reacts, and heavy metal ion gets rid of from sewage, and sewage is followed the ferrite reactor and is flowed out after reacting 30min, and sewage divide into two branches: one path of sewage enters a magnetic separator I, sludge is separated from the sewage, the sewage is discharged after reaching standards, the sludge enters an aging reactor, after aging and stabilization, part of the sludge is discharged from the system, and part of the sludge flows back to the ferrite process; pumping the other path of sewage into a catalyst reaction kettle through a metering pump, pumping 10L of sludge-water mixture into the catalyst reaction kettle, adding 1-2% by mass of potassium permanganate, oxidizing ferrous iron with the potassium permanganate, and generating MnO 2 ，MnO 2 Coated on Fe 3 O 4 And forming a magnetic catalyst on the surface.
The center of the upper part of the magnetic separator is provided with a cylindrical water inlet pipe, the lower part of the water inlet pipe is provided with a reflecting plate, the outer side of the water inlet pipe is provided with a square settling tube, the settling tube is connected with a sludge tube, the sludge tube is circular, the outer wall of the sludge tube is provided with a permanent magnet, and the sludge tube is internally provided with a circular arc scraping rod which can be used for scraping a rodThe magnetic sludge adsorbed on the inner wall is strongly scraped by reciprocating motion, sewage and magnetic substances enter from top to bottom from the middle sedimentation pipe, the sewage flows upwards after passing through the reflecting plate, the magnetic sludge is rapidly sedimentated downwards under the action of gravity and magnetism, the first magnetic separator sends the sludge into the aging reactor through a sludge pump, and the sludge is converted into Fe with stable performance in the aging reactor 3 O 4 。
The heavy metal sewage treatment equipment and the process for breaking the complex by using the ozone have the following advantages;
1) this application contains heavy metal sewage of complex and magnetic catalysis together gets into fluidized bed reactor, and ozone is let in to the reactor bottom, and catalyst, ozone, sewage can the intensive mixing in the fluidized bed.
2) The application utilizes magnetic material Fe generated by sewage treatment 3 O 4 For nuclei, preparation of MnO 2 The wrapped magnetic catalyst has high catalyst activity and magnetism, and is convenient to separate and recycle.
3) The magnetic separator has the advantages of simple structure, high surface load and good separation effect, and the permanent magnet is fully utilized to adsorb magnetic substances.
Drawings
FIG. 1 is a schematic view of the entire application;
FIG. 2 is a schematic view of a magnetic separator according to the present application;
FIG. 3 is a schematic view of a magnetic separator according to the present application;
description of the components:
1. a kit; 2. a catalyst reaction kettle; 3. a metering pump; 4. a ferrite reactor; 5. a fluidized bed reactor; 6. a sewage pump; 7. an aging reactor; 81. a first magnetic separator; 82. a second magnetic separator; 8-1, a water inlet pipe; 8-2, a sedimentation tube; 8-3, a reflecting plate; 8-4, a precipitation plate; 8-5, permanent magnets; 8-6, a sludge pipe; 8-7, arc-shaped scraping rod.
Detailed Description
The invention is described in further detail below with reference to the following figures and embodiments:
the invention provides equipment and a process for treating heavy metal sewage by using ozone to break collaterals.
As a specific embodiment of the present invention, the present application provides a heavy metal sewage treatment device using ozone to break complex as shown in fig. 1, which comprises a chemical tank 1, a catalyst reaction kettle 2, a metering pump 3, a ferrite reactor 4, a fluidized bed reactor 5, a sewage pump 6, an aging reactor 7, a first magnetic separator 81 and a second magnetic separator 82, wherein a water inlet of the sewage pump 6 is communicated with sewage, the sewage pump 6 is connected with the fluidized bed 5 through sludge pipes 8-6 of the magnetic separator 82, a tail gas outlet is arranged at the upper part of the fluidized bed reactor 5, a sewage outlet at the upper part of the fluidized bed reactor 5 is connected with the top of the second magnetic separator 82, ozone is connected with the bottom of the fluidized bed reactor 5, a water outlet at the top of the magnetic separator 82 is provided with a pipeline connected with the ferrite reactor and corresponding pipelines are provided with a calcium hydroxide inlet, a magnetic sludge inlet and a ferrite salt inlet, the ferrite reactor 4 is connected with the top of the first magnetic separator 81 and a water inlet of the metering pump 3 through pipelines, the chemical box 1 is a potassium permanganate preparation box and is connected with the catalyst reaction kettle 2 through a pipeline, a water outlet of the metering pump 3 is connected with the catalyst reaction kettle 2, the top of the first magnetic separator 81 is provided with a sewage discharge port reaching the standard, the bottom of the sewage discharge port is provided with a pipeline which is connected with the aging reactor 7, and the aging reactor 7 is provided with a magnetic sludge discharge port and a recycling port.
As shown in figure 2, the first magnetic separator 81 is formed by arranging at least two separator units in parallel, each separator unit comprises a water inlet pipe 8-1, a settling pipe 8-2, a reflecting plate 8-3, a permanent magnet 8-5, a sludge pipe 8-6 and an arc-shaped scraping rod 8-7, the water inlet pipe 8-1 is arranged in the square sedimentation pipe 8-2, one side of the upper part of the sedimentation pipe 8-2 is provided with a water outlet, the bottom end of the water inlet pipe 8-1 is provided with a reflecting plate 8-3, the lower end of the sedimentation pipe 8-2 is inserted into a round sludge pipe 8-6, the inner wall of the bottom of the sludge pipe 8-6 is provided with an arc-shaped scraping rod 8-7 which can scrape magnetic sludge adsorbed on the inner wall through reciprocating motion, and the outer wall of the bottom of the sludge pipe 8-6 is provided with a permanent magnet 8-5.
The second magnetic separator 82 comprises a water inlet pipe 8-1, a sedimentation pipe 8-2, a reflecting plate 8-3, a sedimentation plate 8-4, a permanent magnet 8-5 and a sludge pipe 8-6 as shown in figure 1, the water inlet pipe 8-1 is arranged in the square sedimentation pipe 8-2, one side of the upper part of the sedimentation pipe 8-2 is provided with a water outlet, the bottom end of the water inlet pipe 8-1 is provided with a reflecting plate 8-3, the lower end of the sedimentation pipe 8-2 is inserted into a round sludge pipe 8-6, the lower part of the sedimentation pipe 8-2 is provided with a sedimentation plate 8-4 made of non-magnetic material, one side of the sedimentation plate 8-4 is hinged on the sedimentation pipe 8-2, the other side of the sludge pipe 8-6 is freely opened and closed corresponding to the settling plate 8-4, and the permanent magnet 8-5 is distributed on the outer wall of the bottom of the sludge pipe 8-6.
The length of the settling plate 8-4 is larger than that of the settling pipe 8-2, so that the condition that the bottom settling plate is pushed by sewage to be opened upwards can be prevented.
As a specific embodiment of the heavy metal sewage treatment process for breaking the complex by using ozone, the method comprises the following specific steps:
heavy metal sewage containing complex and magnetic catalyst are mixed and then enter the fluidized bed reactor 5 from the bottom, ozone is introduced from the bottom of the fluidized bed reactor 5, and gas, liquid and solid three phases flow upwards and are uniformly mixed. Under the action of a catalyst, ozone and hydroxyl free radicals generated by catalysis destroy the complex structure of sewage, complex heavy metals are converted into free heavy metals, the sewage flows out of the side edge of the upper part of a fluidized bed reactor 5 and enters a magnetic separator II 82, the center of the upper part of the magnetic separator II 82 is a cylindrical water inlet pipe 8-1, the lower part of the water inlet pipe 8-1 is provided with a reflecting plate 8-3, the outer side of the sewage is a square settling pipe 8-2, the lower part of the settling pipe 8-2 is provided with a settling plate 8-4 made of nonmagnetic materials, one side of the settling plate is hinged on the settling pipe 8-2, the other side is freely opened and closed correspondingly, the settling pipe 8-2 is connected with a sludge pipe 8-6, the sludge pipe 8-6 is round, permanent magnets are distributed on the outer wall of the sludge pipe 8-6, two ends of the sludge pipe 8-6 are connected with a water inlet pipeline, under the action of sewage pressure, the settling plate 8-4 is in a closed state, the catalyst and the sewage flowing out of the fluidized bed reactor 5 enter the second magnetic separator 82 from the middle settling pipe 8-2 from top to bottom, the sewage flows upwards after passing through the reflecting plate 8-3, the magnetic catalyst is rapidly settled downwards under the action of gravity and magnetism, and the solid-liquid separation effect is high. The catalyst is deposited on the precipitation plate 8-4, and the larger the catalyst accumulation amount is, the larger the magnetic force is received. When the magnetic force is greater than the water pressure, the settling plate 8-4 is opened, the catalyst flows downwards and is brought into the fluidized bed by sewage for recycling. The settling plate 8-4 is subjected to a reduced downward force and recloses. The length of the settling plate is greater than that of the settling pipe, so that the bottom plate is prevented from being upwards opened by pushing sewage.
The sewage after the breaking of the network and separated from the second magnetic separator 82 flows into a ferrite reactor 4, and ferrous salt and backflow magnetic sludge Fe are added on the sewage pipeline according to the measurement 3 O 4 By Ca (OH) 2 The pH value is adjusted, sewage enters the ferrite reactor 4 to fully react, heavy metal ions are removed from the sewage, the sewage flows out of the ferrite reactor 4 after reacting for 30min, and the sewage is divided into two branches: one path of sewage enters a second magnetic separator 81, sludge is separated from the sewage, the sewage is discharged after reaching standards, the sludge enters an aging reactor, after aging and stabilization, part of the sludge is discharged from the system, and part of the sludge flows back to the ferrite process; pumping the other path of sewage into a catalyst reaction kettle 2 through a metering pump 3, pumping 10L of sludge-water mixture into the catalyst reaction kettle 2, adding potassium permanganate with the mass concentration of 1-2%, oxidizing ferrous iron by the potassium permanganate, and generating MnO 2 ，MnO 2 Coated on Fe 3 O 4 And forming a magnetic catalyst on the surface.
The center of the upper part of the second magnetic separator 81 is a cylindrical water inlet pipe 8-1, the lower part of the water inlet pipe 8-1 is provided with a reflecting plate 8-3, the outer side of the water inlet pipe is a square settling pipe 8-2, the settling pipe 8-2 is connected with a sludge pipe 8-6, the sludge pipe 8-6 is round, the outer wall of the sludge pipe 8-6 is provided with a permanent magnet, an arc-shaped scraping rod 8-7 is arranged in the sludge pipe 8-6 and can reciprocate to scrape the magnetic sludge adsorbed on the inner wall strongly, the sewage and magnetic substances enter from the middle settling pipe 8-2 from top to bottom, the sewage flows upwards after passing through the reflecting plate, the magnetic sludge is rapidly settled downwards under the action of gravity and magnetism, the second magnetic separator 82 sends the sludge into an aging reactor 7 through a sludge pump, and the sludge is converted into Fe with stable performance in the aging reactor 7 3 O 4 。
The practical processing case of the application is as follows:
after sewage pretreatment of a certain electroplating production enterprise, COD is 78mg/L, CN content is 3.91mg/L, copper content is 2.1mg/L, and nickel content is 2.50 mg/L. After the wastewater enters a reactor for treatment, the ozone introduction amount is 10mg/L, and after 10min of complex breaking reaction, the COD content is 17mg/L and the CN content is 0.15 mg/L. After subsequent ferrite precipitation treatment, the copper content is 0.18mg/L, and the nickel content is 0.025 mg/L.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any modifications or equivalent variations made in accordance with the technical spirit of the present invention may fall within the scope of the present invention as claimed.
Claims (3)
1. The utility model provides an utilize heavy metal sewage treatment device of ozone broken luo, includes chemical tank (1), catalyst reation kettle (2), measuring pump (3), ferrite reactor (4), fluidized bed reactor (5), sewage pump (6), ageing reactor (7), magnetic separator one (81) and magnetic separator two (82), its characterized in that: a water inlet of the sewage pump (6) is communicated with sewage, a water outlet pipe of the sewage pump (6) is connected with the fluidized bed reactor (5) through a sludge pipe (8-6) of the magnetic separator II (82), a tail gas outlet is arranged at the upper part of the fluidized bed reactor (5), a sewage outlet at the upper part of the fluidized bed reactor (5) is connected with the top of the magnetic separator II (82) through a water outlet pipe, the sludge pipe (8-6) at the bottom of the magnetic separator II (82) is connected with the bottom of the fluidized bed reactor (5), ozone is introduced into the bottom of the fluidized bed reactor (5), a water outlet pipe at the top of the magnetic separator II (82) is connected with the ferrite reactor (4), a calcium hydroxide inlet, a magnetic sludge inlet and a ferrite inlet are arranged between the magnetic separator II (82) and the ferrite reactor (4), the ferrite reactor (4) is respectively connected with the top of the magnetic separator I (81) and a water inlet of the metering pump (3) through pipelines, the water outlet of the metering pump (3) is connected with the catalyst reaction kettle (2), the chemical box (1) is a potassium permanganate preparation box and is connected with the catalyst reaction kettle (2) through a pipeline, the top of the magnetic separator I (81) is provided with a sewage discharge port reaching the standard, the bottom of the magnetic separator I is provided with a pipeline connected with an aging reactor (7), and the aging reactor (7) is provided with a magnetic sludge discharge port and a recycling port;
the second magnetic separator (82) comprises a water inlet pipe (8-1), a settling pipe (8-2), a reflecting plate (8-3), a settling plate (8-4), a permanent magnet (8-5) and a sludge pipe (8-6), the water inlet pipe (8-1) is arranged in the square settling pipe (8-2), a water outlet is formed in one side of the upper portion of the settling pipe (8-2), the reflecting plate (8-3) is arranged at the bottom end of the water inlet pipe (8-1), the lower end of the settling pipe (8-2) is inserted into the round sludge pipe (8-6), the settling pipe (8-2) is provided with a settling plate (8-4) made of a non-magnetic material at the lower end, one side of the settling plate (8-4) is hinged to the settling pipe (8-2), and the other side of the corresponding to the settling plate (8-4) is freely opened and closed, the permanent magnet (8-5) is distributed on the outer wall of the bottom of the sludge pipe (8-6), and two ends of the sludge pipe (8-6) are connected with the water inlet pipeline;
the length of the settling plate (8-4) is greater than the length of the section of the lower end of the settling pipe (8-2), under the action of sewage pressure, the settling plate (8-4) is in a closed state, catalyst and sewage flowing out of the fluidized bed reactor (5) enter the magnetic separator II (82) from top to bottom from the middle settling pipe (8-2), the sewage flows upwards after passing through the reflecting plate (8-3), the magnetic catalyst is rapidly settled downwards under the action of gravity and magnetism, the catalyst is settled on the settling plate (8-4), the larger the catalyst accumulation amount is, the larger the magnetic force of the received permanent magnet is, when the magnetic force is greater than the water pressure, the settling plate (8-4) is opened, the catalyst flows downwards and is brought into the fluidized bed for recycling, and the settling plate (8-4) is reduced and closed again under the downward acting force.
2. The heavy metal sewage treatment device utilizing ozone to break collaterals according to claim 1, which is characterized in that: the magnetic separator I (81) is formed by arranging at least two separator units in parallel, each separator unit comprises a water inlet pipe (8-1), a sedimentation pipe (8-2), a reflecting plate (8-3), a permanent magnet (8-5), a sludge pipe (8-6) and a circular arc-shaped scraping rod (8-7), the water inlet pipe (8-1) is arranged in the square sedimentation pipe (8-2), a water outlet is formed in one side of the upper part of the sedimentation pipe (8-2), the reflecting plate (8-3) is arranged at the bottom end of the water inlet pipe (8-1), the lower end of the sedimentation pipe (8-2) is inserted into the circular sludge pipe (8-6), the circular arc-shaped scraping rod (8-7) which can scrape magnetic sludge adsorbed on the inner wall through reciprocating motion is arranged on the inner wall of the bottom of the sludge pipe (8-6), the outer wall of the bottom of the sludge pipe (8-6) is provided with a permanent magnet (8-5).
3. The heavy metal sewage treatment process by utilizing ozone to break the complex is characterized in that the equipment of any one of claims 1 or 2 is adopted, and the specific steps are as follows:
heavy metal sewage containing a complex enters from the bottom of the fluidized bed reactor (5) after being mixed with a magnetic catalyst, ozone is introduced from the bottom of the fluidized bed reactor (5), gas, liquid and solid phases flow upwards, under the action of the catalyst, the complex structure of the sewage is destroyed by the ozone and hydroxyl radicals generated by catalysis, the complex heavy metal is converted into a free state, and the sewage flows out from the side edge of the upper part of the fluidized bed reactor (5) and enters a second magnetic separator (82);
the center of the upper part of the second magnetic separator (82) is provided with a cylindrical water inlet pipe (8-1), the lower part of the water inlet pipe (8-1) is provided with a reflecting plate (8-3), the outer side of the second magnetic separator (82) is provided with a square sedimentation pipe (8-2), the lower part of the sedimentation pipe (8-2) is provided with a sedimentation plate (8-4) made of non-magnetic material, one side of the sedimentation plate is hinged on the sedimentation pipe (8-2) and is freely opened and closed corresponding to the other side, the sedimentation pipe (8-2) is connected with a sludge pipe (8-6), the sludge pipe (8-6) is round, the outer wall of the sludge pipe (8-6) is provided with permanent magnets, two ends of the sludge pipe (8-6) are connected with a water inlet pipeline, the sedimentation plate (8-4) is in a closed state under the action of sewage pressure, and the catalyst and the sewage flowing out of the fluidized bed reactor (5) enter the second magnetic separator (82) from the middle sedimentation pipe (8-2) from top to bottom, the sewage flows upwards after passing through the reflecting plate (8-3), the magnetic catalyst is rapidly precipitated downwards under the action of gravity and magnetism, the catalyst is deposited on the precipitating plate (8-4), the larger the catalyst accumulation amount is, the larger the magnetic force of the permanent magnet is, and when the magnetic force is greater than the water pressure, the precipitating plate (8-4) is opened, the catalyst flows downwards and is brought into the fluidized bed for recycling, and the precipitating plate (8-4) is reduced in downward acting force and is closed again;
the sewage after the second magnetic separator (82) is separated and the broken complex flows into a ferrite reactor (4), ferrous salt and returned magnetic sludge Fe are added on a sewage pipeline according to the measurement 3 O 4 And adding Ca (OH) 2 Adjust pH value, sewage gets into ferrite reactor (4) and fully reacts, and heavy metal ion gets rid of from sewage, and sewage is followed ferrite reactor (4) and is flowed out after reacting 30min, and sewage divide into two branches: one path of sewage enters a magnetic separator I (81), sludge is separated from the sewage, the sewage is discharged after reaching standards, the sludge enters an aging reactor, after aging and stabilization, part of the sludge is discharged from the system, and part of the sludge flows back to the ferrite process; the other path of sewage is pumped into a catalyst reaction kettle (2) by a metering pump (3), 10L of muddy water mixture is pumped into the catalyst reaction kettle (2), potassium permanganate with the mass concentration of 1-2 percent is added, the potassium permanganate oxidizes ferrous iron, and MnO is generated 2 ，MnO 2 Coated on Fe 3 O 4 Surface, forming a magnetic catalyst;
the center of the upper part of the magnetic separator I (81) is provided with a cylindrical water inlet pipe (8-1), the lower part of the water inlet pipe (8-1) is provided with a reflecting plate (8-3), the outer side of the water inlet pipe is provided with a square settling pipe (8-2), the settling pipe (8-2) is connected with a sludge pipe (8-6), the sludge pipe (8-6) is circular, the outer wall of the sludge pipe (8-6) is provided with a permanent magnet, a circular arc scraping rod (8-7) is arranged in the sludge pipe (8-6), the circular arc scraping rod (8-7) reciprocates to strongly scrape magnetic sludge adsorbed on the inner wall, sewage and magnetic substances enter from the middle settling pipe (8-2) from top to bottom, the sewage flows upwards after passing through the reflecting plate, the magnetic sludge is rapidly settled downwards under the action of gravity and magnetism, the magnetic separator I (81) sends the sludge to the aging reactor (7) through a sludge pump, the sludge is converted into Fe with stable performance in the aging reactor (7) 3 O 4 。
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| CN202011327140.1A CN112678941B (en) | 2020-11-24 | 2020-11-24 | Heavy metal sewage treatment equipment and process for breaking collaterals by using ozone |
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| CN202011327140.1A CN112678941B (en) | 2020-11-24 | 2020-11-24 | Heavy metal sewage treatment equipment and process for breaking collaterals by using ozone |
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