CN116177581A - Method and device for preparing polyaluminium sulfate flocculant by utilizing aluminum-containing acidic wastewater - Google Patents
Method and device for preparing polyaluminium sulfate flocculant by utilizing aluminum-containing acidic wastewater Download PDFInfo
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- CN116177581A CN116177581A CN202211537186.5A CN202211537186A CN116177581A CN 116177581 A CN116177581 A CN 116177581A CN 202211537186 A CN202211537186 A CN 202211537186A CN 116177581 A CN116177581 A CN 116177581A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/68—Aluminium compounds containing sulfur
- C01F7/74—Sulfates
- C01F7/741—Preparation from elemental aluminium or elemental aluminium containing materials, e.g. foil or dross
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- Water Supply & Treatment (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to the technical field of wastewater treatment, and particularly discloses a method and a device for preparing a polymeric aluminum sulfate flocculant by utilizing aluminum-containing acidic wastewater. In the invention, the polyaluminium sulfate flocculant obtained by the method after the wastewater is treated has good flocculation treatment effect on some industrial wastewater, realizes maximization of income and has certain commercial value.
Description
Technical Field
The invention relates to a method for preparing a polymeric aluminum sulfate flocculant by using aluminum-containing acidic wastewater, and belongs to the technical field of wastewater treatment.
Background
Some electroplating shops in the prior art can generate acid wastewater containing a large amount of aluminum ions in the electroplating process, and the wastewater is discharged after being treated, so that certain economic cost is required. As the waste liquid contains a large amount of aluminum ions, sulfate ions and phosphate ions, phosphoric acid can be recovered by extraction, so that waste liquid containing a large amount of aluminum sulfate is obtained, and the waste liquid is reacted again to synthesize the polyaluminum sulfate flocculant, wherein the polyaluminum sulfate is one of the polyaluminum sulfate, and the polyaluminum sulfate flocculant is the same as other inorganic polymer coagulants, and has higher removal rate for microorganisms, bacteria, algae and the like in the waste water, thereby realizing the utilization of waste water resources, changing waste into valuables and maximizing economic benefits.
However, in the process of preparing the polyaluminium sulfate flocculant by utilizing the wastewater, the wastewater is subjected to larger impact in the stirring barrel, so that foam exists on the surface of the wastewater, and the foam is more and more stirred with the wastewater by using a stirring mechanism, if the wastewater is not treated in time, the oxygenation efficiency in the stirring barrel is greatly reduced due to the fact that the foam has certain viscosity, the aluminum sulfate in the wastewater and the alkalizing agent react insufficiently, and the preparation efficiency of the polyaluminium sulfate flocculant is reduced.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a method for preparing a polymeric aluminum sulfate flocculant by utilizing aluminum-containing acidic wastewater.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a method for preparing a polymeric aluminum sulfate flocculant by utilizing aluminum-containing acidic wastewater, comprising the following steps:
step one: and (3) distilling and concentrating: distilling the aluminum-containing acidic wastewater in a distillation device at normal temperature and normal pressure, stopping distilling when COD is concentrated to a preset concentration, and removing low-boiling-point organic matters in the wastewater;
step two: alkalization reaction: placing the concentrated aluminum-containing acidic wastewater in the first step into a reactor with controllable temperature and stirring, weighing a preset amount of alkalizing agent, adding a preset amount of water, dissolving and stirring to form an alkalizing agent solution, dropwise adding the alkalizing agent solution into the reactor, and stirring at a constant temperature to perform polymerization reaction;
step three: curing at constant temperature: and step two, after the polymerization reaction is finished, maintaining the temperature during the reaction, stopping stirring, curing, and filtering after curing is finished to obtain the polyaluminium sulfate flocculant.
Optionally, in the distillation concentration stage, the concentration range of COD concentration is 500-800 mg/L.
Optionally, in the alkalization reaction stage, the alkalizing agent can be any one of NaOH, ca (OH) 2 and NaHCO3, and the molar ratio of the alkalizing agent to the aluminum sulfate is 2-4.
Optionally, in the alkalization reaction stage, the polymerization reaction temperature is 60-80 ℃, the stirring speed of the polymerization reaction is 80-120 r/min, the polymerization reaction time is 60-80 min, and a reactor used in the polymerization reaction is provided with a stirring barrel with controllable temperature.
Optionally, in the constant-temperature curing stage, the curing time is 2-4 h.
Optionally, a device for preparing polyaluminum sulfate flocculant by utilizing aluminum-containing acidic wastewater, which is applied to the preparation method in the above, comprises a stirring barrel and a base, wherein the stirring barrel is arranged at the top of the base, a top plate is arranged at the top of the stirring barrel, a storage barrel is arranged at the top of the stirring barrel, a first stirring mechanism and a second stirring mechanism are respectively arranged in the stirring barrel and the storage barrel, a foam removing mechanism for processing foam is further arranged in the stirring barrel, the foam removing mechanism comprises a mounting plate arranged in the stirring barrel, and two water outlets are symmetrically arranged at the bottom of the mounting plate.
Optionally, the second rabbling mechanism is including installing the motor at the storage barrel top, and the output of motor extends to the internal connection of storage barrel and has the pivot, and a plurality of second stirring vane are installed to the outer wall of pivot, and the top of storage barrel is close to the motor and installs into the hopper, and two through-holes have been seted up to the bottom symmetry of storage barrel, and two sealing blocks are installed to the position that the interior bottom surface of storage barrel is close to two through-holes, and the second stirring vane internally mounted who is located the bottommost has first electric telescopic handle, and can respectively with two sealing blocks looks butt when the extension end of first electric telescopic handle is the state of stretching out.
Optionally, first rabbling mechanism includes the second electric telescopic handle, the second electric telescopic handle sets up in the inside of agitator, the bottom of pivot is passed and is stored barrel and roof and second electric telescopic handle's top is connected, the bottom of agitator is connected with the filter screen through a plurality of third electric telescopic handle, first stirring vane is installed in the top intermediate position rotation of filter screen, the bottom of agitator still is equipped with and is used for carrying out sealed lid to the filter screen, the slot has been seted up at the top of first stirring vane, the inserted block with slot looks adaptation is installed to the end that stretches out of second electric telescopic handle.
Optionally, mounting panel and the outer wall sliding fit of second electric telescopic handle, two dogs are installed to the outer wall of second electric telescopic handle, and logical groove with two dog looks adaptations is seted up to the inside of mounting panel, and the opposite both ends of standing of mounting panel all articulate there is the expansion plate, and two expansion plates are semi-circular expansion plate when stretching out the expansion state, and two shrouding are installed to one side that one of them expansion plate is close to the mounting panel, and two shrouding can carry out the shutoff to two outlet respectively.
Optionally, two spouts have been seted up near outlet symmetry at the top of mounting panel, and electric slider is all installed at the both ends of two spouts, and the movable plate is all installed at the top of two electric sliders, and the top of two movable plates all is connected with the stay cord, and two stay cords keep away from the one end of two movable plates and all are connected with outside winding mechanism.
The beneficial effects of the invention are as follows:
1. in the invention, the polyaluminium sulfate flocculant obtained by the method has good flocculation treatment effect on some industrial wastewater after the wastewater is treated, and the synthetic cost is much lower than that of directly treating the wastewater to reach the standard, so that the wastewater is truly changed into valuable, the maximization of the income is realized, and the method has certain commercial value.
2. According to the invention, when the alkalizing agent solution in the storage barrel drops downwards into the stirring barrel through the through hole to be mixed with the wastewater, the expansion plates at the two ends of the mounting plate and the mounting plate body can be enclosed into a collecting cavity, part of the alkalizing agent solution is temporarily stored in the collecting cavity, and when foam is generated on the wastewater water surface, the two expansion plates can be controlled to rotate at a certain angle towards the mutually far direction, so that the alkalizing agent solution in the collecting cavity can drive the second electric expansion rod to rotate at a high speed along with the rotating shaft in the stirring barrel, and is thrown out from the water outlet at the bottom of the mounting plate to the wastewater water surface, so that the foam on the water surface is broken, the foam quantity is effectively reduced, the mixing of the wastewater and the alkalizing agent solution is not influenced, and the preparation efficiency of the polyaluminium sulfate flocculant is improved.
3. According to the invention, when the wastewater in the stirring barrel and the alkalizing agent solution are stirred and mixed, a small amount of water-insoluble scum or other sundries exist on the water surface, after the motor drives the rotating shaft and the second electric telescopic rod to rotate for a certain angle, the external winding mechanism can control the mounting plate to pass through the upper stop block and be clamped with the lower stop block through the stay rope, the mounting plate is just positioned on the water surface, then the two telescopic plates are driven to rotate downwards in the mutually-away direction through the external driving mechanism, at the moment, the telescopic plate with the sealing plate on one outer wall and the other telescopic plate rotate on the water surface, and other sundries which exist on the water surface and are insoluble in the water can be salvaged and collected, so that the quality of the polyaluminum sulfate flocculant is prevented from being influenced by the scum or other sundries.
4. According to the invention, after the preparation of the polyaluminum sulfate flocculant in the stirring barrel is completed, the polyaluminum sulfate flocculant can be deposited at the bottom of the stirring barrel, redundant wastewater can be discharged, the two expansion plates are controlled to rotate downwards through the external driving mechanism, so that the two expansion plates are in an unfolding state, then the two expansion plates are driven to move downwards to the position of the extending end of the second electric telescopic rod through the external driving mechanism, and then the extending end of the second electric telescopic rod can be extended downwards to push the mounting plate and the expansion plates with the two ends in the unfolding state to move downwards so as to squeeze the polyaluminum sulfate flocculant at the bottom of the stirring barrel, so that the filtering efficiency is quickened, and the problem that the preparation efficiency of the polyaluminum sulfate flocculant is influenced by long filtering time is avoided.
Drawings
For the purpose of facilitating understanding of those skilled in the art, the present invention will be further described with reference to the accompanying drawings
FIG. 1 is a schematic diagram of the overall structure of a device for preparing a polyaluminum sulfate flocculant by utilizing aluminum-containing acidic wastewater;
FIG. 2 is a cross-sectional view of the structure of the mixing drum and the storage drum of FIG. 1;
FIG. 3 is a cross-sectional view of the structure of the storage tub and one of the second stirring vanes in the present invention;
FIG. 4 is a cross-sectional view showing the structure of the stirring barrel in the present invention;
FIG. 5 is a schematic view of the bottom of the mounting plate of the present invention;
FIG. 6 is a schematic view showing the structure of one of the expansion plates in the unfolded state according to the present invention;
fig. 7 is a schematic structural view of a bubble removing mechanism in the present invention.
In the figure: 1. a stirring barrel; 2. a base; 3. sealing cover; 4. a top plate; 5. a storage tub; 6. feeding into a hopper; 7. a motor; 8. a rotating shaft; 9. a second electric telescopic rod; 10. a first stirring blade; 11. a mounting plate; 12. a second stirring blade; 13. a filter screen; 15. a first electric telescopic rod; 16. a sealing block; 17. a through hole; 18. a pull rope; 19. a third electric telescopic rod; 20. inserting blocks; 21. a slot; 22. a water outlet; 23. a stop block; 24. a through groove; 25. a telescoping plate; 26. a sealing plate; 27. a chute; 28. a moving plate; 29. an electric slide block.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-7, a method for preparing a polymeric aluminum sulfate flocculant using an acidic wastewater containing aluminum, the method comprising the steps of:
step one: and (3) distilling and concentrating: distilling the aluminum-containing acidic wastewater in a distillation device at normal temperature and normal pressure, stopping distilling when COD is concentrated to a preset concentration, and removing low boiling point organic matters such as dimethylamine, dichloromethane, methanol and the like in the wastewater;
step two: alkalization reaction: placing the concentrated aluminum-containing acidic wastewater in the first step into a reactor with controllable temperature and stirring, weighing a preset amount of alkalizing agent, adding a preset amount of water, dissolving and stirring to form an alkalizing agent solution, dropwise adding the alkalizing agent solution into the reactor, and stirring at a constant temperature to perform polymerization reaction;
step three: curing at constant temperature: and step two, after the polymerization reaction is finished, maintaining the temperature during the reaction, stopping stirring, curing, and filtering after curing is finished to obtain the polyaluminium sulfate flocculant.
As a technical optimization scheme of the invention, in the distillation concentration stage, the concentration range of COD concentration is 500-800 mg/L.
As a technical optimization scheme of the invention, in the alkalization reaction stage, the alkalizing agent can be any one of NaOH, ca (OH) 2 and NaHCO3, and the molar ratio of the alkalizing agent to aluminum sulfate is 2-4.
As a technical optimization scheme of the invention, in the alkalization reaction stage, the polymerization reaction temperature is 60-80 ℃, the stirring speed of the polymerization reaction is 80-120 r/min, the polymerization reaction time is 60-80 min, and the reactor used in the polymerization reaction is provided with a temperature-controllable stirring barrel 1.
As a technical optimization scheme of the invention, the curing time is 2-4 h in the constant-temperature curing stage.
As a technical optimization scheme of the invention, the device for preparing the polyaluminium sulfate flocculant by utilizing the aluminum-containing acidic wastewater comprises a stirring barrel 1 and a base 2, wherein the stirring barrel 1 is arranged at the top of the base 2, a top plate 4 is arranged at the top of the stirring barrel 1, a storage barrel 5 is arranged at the top of the stirring barrel, a first stirring mechanism and a second stirring mechanism are respectively arranged in the stirring barrel 1 and the storage barrel 5, a foam removing mechanism for treating foam is further arranged in the stirring barrel 1, the foam removing mechanism comprises a mounting plate 11 arranged in the stirring barrel 1, and two water outlets 22 are symmetrically arranged at the bottom of the mounting plate 11.
As a technical optimization scheme of the invention, the second stirring mechanism comprises a motor 7 arranged at the top of the storage barrel 5, a rotating shaft 8 is connected to the inside of the storage barrel 5, a plurality of second stirring blades 12 are arranged on the outer wall of the rotating shaft 8, and a feeding hopper 6 is arranged at the top of the storage barrel 5 close to the motor 7. Before adding the alkalizing agent into the wastewater in the stirring barrel 1, the alkalizing agent can be placed in the storage barrel 5 through the feeding hopper 6, a proper amount of water is added into the storage barrel 5, the motor 7 is started to drive the rotating shaft 8 and the plurality of second stirring blades 12 on the outer wall of the rotating shaft to synchronously rotate, and the alkalizing agent and the water in the storage barrel 5 are fully stirred to form an alkalizing agent solution, so that the alkalizing agent solution is convenient to be added into the stirring barrel 1 later. Two through holes 17 are symmetrically formed in the bottom of the storage barrel 5, two sealing blocks 16 are installed on the inner bottom surface of the storage barrel 5 close to the positions of the two through holes 17, a first electric telescopic rod 15 is installed in the second stirring blade 12 at the bottommost end, and when the extending end of the first electric telescopic rod 15 is in an extending state, the extending end of the first electric telescopic rod can be respectively abutted against the two sealing blocks 16. After the alkalizing agent solution in the storage barrel 5 is stirred, the extending end of the first electric telescopic rod 15 in the second stirring blade 12 at the bottommost end can be controlled to extend downwards, the motor 7 drives the second stirring blade 12 to rotate, the first electric telescopic rod 15 in an extending state is continuously abutted against two sealing blocks 16 arranged at the bottom of the storage barrel 5, when the first electric telescopic rod 15 is abutted against the sealing blocks 16, the first electric telescopic rod 15 can push the sealing blocks 16 to rotate for a certain angle, the through holes 17 are exposed, the solution in the storage barrel 5 can drop downwards into the stirring barrel 1 through the through holes 17, and the aluminum sulfate in waste water and the alkalizing agent can be conveniently mixed for reaction.
As a technical optimization scheme of the invention, the first stirring mechanism comprises a second electric telescopic rod 9, the second electric telescopic rod 9 is arranged in the stirring barrel 1, the bottom end of a rotating shaft 8 penetrates through a storage barrel 5 and a top plate 4 to be connected with the top end of the second electric telescopic rod 9, the bottom of the stirring barrel 1 is connected with a filter screen 13 through a plurality of third electric telescopic rods 19, a first stirring blade 10 is rotatably arranged at the middle position of the top of the filter screen 13, a sealing cover 3 for sealing the filter screen 13 is sleeved at the bottom of the stirring barrel 1, a slot 21 is formed in the top of the first stirring blade 10, and an inserting block 20 matched with the slot 21 is arranged at the extending end of the second electric telescopic rod 9. Because the second electric telescopic rod 9 is connected with the bottom end of the rotating shaft 8, when the motor 7 drives the rotating shaft 8 to rotate, the second electric telescopic rod 9 can be synchronously driven to rotate in the stirring barrel 1, when the extending end of the second electric telescopic rod 9 is in an extending state, the inserting block 20 arranged at the extending end can be inserted into the inserting groove 21 at the top of the first stirring blade 10, and then the first stirring blade 10 can be synchronously driven to rotate in the stirring barrel 1, so that waste water can be fully mixed with an alkalizing agent solution, and the reaction of aluminum sulfate in the waste water and the alkalizing agent is facilitated.
As a technical optimization scheme of the invention, the mounting plate 11 is in sliding fit with the outer wall of the second electric telescopic rod 9, two stop blocks 23 are arranged on the outer wall of the second electric telescopic rod 9, through grooves 24 matched with the two stop blocks 23 are formed in the mounting plate 11, two opposite ends of the mounting plate 11 are hinged with telescopic plates 25, the two telescopic plates 25 are in a semicircular telescopic plate 25 when in an extending and unfolding state, two sealing plates 26 are arranged on one side, close to the mounting plate 11, of one telescopic plate 25, and the two sealing plates 26 can seal the two water outlets 22 respectively.
As a technical optimization scheme of the invention, two sliding grooves 27 are symmetrically formed in the top of the mounting plate 11 near the water outlet 22, electric sliding blocks 29 are arranged at two ends of the two sliding grooves 27, movable plates 28 are arranged at the tops of the two electric sliding blocks 29, pull ropes 18 are connected to the tops of the two movable plates 28, and one ends, far away from the two movable plates 28, of the two pull ropes 18 are connected with an external winding mechanism. When the storage barrel 5 discharges the alkalizing agent solution into the stirring barrel 1 through the through hole 17, the external driving mechanism controls the expansion plate 25 with one outer wall provided with the sealing plate 26 to rotate downwards 90 to be in a horizontal state, at the moment, the sealing plate 26 does not seal the water outlet 22 of the mounting plate 11, so that the solution dropped by the through hole 17 can freely pass through the water outlet 22 to be contacted and mixed with waste water, when foam appears on the waste water surface in the stirring barrel 1, the external winding mechanism controls the stretching of the pull rope 18, so that the mounting plate 11 can move downwards to the top of the stop block 23 positioned above on the outer wall of the second electric expansion rod 9, the rectangular groove arranged at the bottom of the mounting plate 11 can be spliced with the top of the stop block 23, then the external driving mechanism controls one of the expansion plate 25 to reset, so that the sealing plate 26 on the outer wall can seal the water outlet 22, at this time, the solution dropped from the through hole 17 falls into the collecting cavity surrounded by the two expansion plates 25 and the sealing plate 26 for collecting, when the solution collected in the collecting cavity is enough, one expansion plate 25 can be controlled to rotate downwards by a small extent again, so that the solution accumulated at the top of the sealing plate 26 can slowly flow to the top of the mounting plate 11 along the filter screen at the connection part of the sealing plate 26 and the expansion plate 25 and slowly drop downwards from the water outlet 22, because the mounting plate 11 is spliced with the stop block 23 on the outer wall of the second electric expansion rod 9 through the rectangular groove at the bottom at this time, the rotating shaft 8 drives the second electric expansion rod 9 to rotate, simultaneously drives the mounting plate 11 to rotate in the stirring barrel 1, so that the solution which is slowly dropped downwards from the water outlet 22 is influenced by the second electric expansion rod 9 which rotates at a high speed and can be splashed onto the water surface of the wastewater at a high speed, breaking up foam on the water surface, thereby achieving the effect of removing foam and avoiding the influence on the preparation efficiency of the polyaluminum sulfate flocculant caused by the mass production of the foam; when the wastewater in the stirring barrel 1 and the alkalizing agent solution are stirred and mixed, a small amount of water-insoluble scum or other sundries still exist on the water surface, the external winding mechanism drives the mounting plate 11 to move upwards for a certain distance through the pull rope 18, the rectangular groove at the bottom of the mounting plate 11 is enabled to fall off from the stop block 23, then the motor 7 drives the rotating shaft 8 and the second electric telescopic rod 9 to rotate for 90 degrees, the position of the stop block 23 can coincide with the position of the through groove 24 in the mounting plate 11, then the external winding mechanism controls the mounting plate 11 to move upwards through the extension pull rope 18, after the two stop blocks 23 passing through the upper part, the motor 7 resets through the control rotating shaft 8 and the second electric telescopic rod 9, the external winding mechanism continues to control the extension of the pull rope 18 to drive the mounting plate 11 to move downwards, the rectangular groove at the bottom of the mounting plate 11 can be in contact with the two stop blocks 23 at the lower part at the moment, the mounting plate 11 is just positioned on the water surface, then the two telescopic plates 25 are driven by the external driving mechanism to rotate towards the direction of the mutual distance from the two electric telescopic plates 25, the two electric telescopic plates 25 can be prevented from being in the state of being in which the water surface 25 and the two water surface 25 are in the state of being in which the water surface 25 is not influenced by the two electric telescopic plates 25 or the two electric telescopic plates are in the state of the water surface 25 and the two side surfaces are not being influenced by the two vertical side surfaces and the two side surface plates 25 are in the state of the 8 are contacted with the two side surface side 11, and the side is left by the side surface side is left by the two side surface side and the side surface side is left by the side and the side is left side and the side; most of the collected scum or other sundries are concentrated at the top of the mounting plate 11, after the scum or other sundries on the water surface are collected, the two expansion plates 25 can be driven to rotate and reset by an external driving mechanism, at the moment, the sealing plate 26 can squeeze the scum or other sundries at the top of the mounting plate 11 while rotating towards the direction of the mounting plate 11, so that waste water absorbed in the scum or other sundries is squeezed and discharged into the stirring barrel 1 through the water outlet 22 at the top of the mounting plate 11, and waste caused by small amount of waste water along with the absorption of the scum or other sundries is avoided; when the two expansion plates 25, the mounting plate 11 and the sealing plates 26 are matched to collect scum or other sundries, the two electric sliding blocks 29 can move in the sliding grooves 27 towards the approaching direction until the two electric sliding blocks 29 move to the end of the two sliding grooves 27 approaching to each other, and the external driving mechanism controls the moving plate 28 at the top of one of the electric sliding blocks 29 to rotate, so that the gap between the two sealing plates 26 can be filled by one of the moving plates 28 after rotation, and the problem that a large amount of scum or other sundries are exposed from the gap between the two sealing plates 26 in the process of collecting scum or other sundries, so that the collection efficiency is reduced can be avoided; and when two electric sliding blocks 29 drive the movable plate 28 at the top to move to the position close to each other, the reset of the sealing plate 26 is not affected, after the sealing plate 26 resets to squeeze and drain the scum or other sundries at the top of the mounting plate 11, the telescopic plate 25 with the sealing plate 26 is controlled to rotate downwards by 90 degrees in the direction away from the mounting plate 11 again through an external driving mechanism, then the two electric sliding blocks 29 are controlled to move in the sliding groove 27 in the direction away from each other, and the scum or other sundries extruded by the mounting plate 11 through the sealing plate 26 can be pushed to the two ends of the mounting plate 11 in a homeopathic manner, so that the scum or other sundries can be cleaned by subsequent staff conveniently, and the practicability of the device is improved.
When the device is used by a user, waste water is poured into the stirring barrel 1 through an opening at the top of the stirring barrel 1, then an alkalizing agent is placed in the storage barrel 5 through the feeding hopper 6, a proper amount of water is added into the storage barrel 5, and the motor 7 is started to drive the second stirring mechanism to sufficiently stir the alkalizing agent and the water in the storage barrel 5, so that an alkalizing agent solution is formed; after the alkalizing agent solution in the storage barrel 5 is stirred, the extending end of the first electric telescopic rod 15 can be controlled to extend downwards, the motor 7 drives the second stirring blade 12 to rotate, and the first electric telescopic rod 15 in an extending state can push the sealing block 16 to rotate for a certain angle, so that the solution in the storage barrel 5 can drop downwards into the stirring barrel 1 through the through hole 17; because the second electric telescopic rod 9 is connected with the bottom end of the rotating shaft 8, the motor 7 can synchronously drive the second electric telescopic rod 9 to rotate in the stirring barrel 1, and then the first stirring blade 10 can be synchronously driven to rotate in the stirring barrel 1, so that the waste water can be fully mixed with the alkalizing agent solution, the reaction of aluminum sulfate in the waste water and the alkalizing agent is facilitated, and the mixing reaction of aluminum sulfate in the waste water and the alkalizing agent is facilitated.
When foam appears in the waste water surface in agitator 1, control one of them expansion plate 25 through outside actuating mechanism and reset, make the shrouding 26 of its outer wall can carry out the shutoff to outlet 22, the solution that drops from through-hole 17 at this moment can fall in the collection intracavity that is enclosed by two expansion plate 25 and shrouding 26, when the solution that collects in the collection intracavity is enough, can one of them expansion plate 25 of the control down rotation again, make the solution that accumulates at shrouding 26 top can follow outlet 22 slow whereabouts down, because mounting panel 11 is pegged graft mutually with the dog 23 of second electric telescopic handle 9 outer wall through the rectangular channel of bottom this moment, when pivot 8 drives the rotation of second electric telescopic handle 9, also can be synchronous drive mounting panel 11 and rotate in agitator 1's inside, the solution can be high-speed splashes to the surface of water on, break the foam that will be located on the surface of water, thereby reach the effect of removing the bubble, avoid the foam to produce a large amount and bring the influence to the preparation efficiency of polymeric aluminium sulphate flocculant.
When the wastewater in the stirring barrel 1 and the alkalizing agent solution are stirred and mixed, a small amount of water-insoluble scum or other sundries still exist on the water surface, the mounting plate 11 is controlled by the external winding mechanism to be spliced with the two lower stop blocks 23, and then the two telescopic plates 25 are driven by the external driving mechanism to downwards rotate by 90 degrees towards the mutually-far direction, as the mounting plate 11 is spliced with the two lower stop blocks 23 at the moment, the motor 7 can drive the mounting plate 11 and the two telescopic plates 25 to rotate on the water surface, other sundries after the water-insoluble scum on the water surface can be collected, and the problem that the quality of the polyaluminium sulfate flocculant is influenced due to excessive scum or other sundries is avoided.
After the collection of the scum or other sundries on the water surface is completed, the two expansion plates 25 can be driven to rotate and reset by an external driving mechanism, and the scum or other sundries can be extruded by the sealing plate 26 at the moment, so that waste caused by the adsorption of a small amount of wastewater along with the scum or other sundries is avoided; when the two expansion plates 25, the mounting plate 11 and the sealing plate 26 are matched to collect scum or other sundries, the two electric sliding blocks 29 can move in the sliding groove 27 towards the approaching direction, then the external driving mechanism controls the expansion plate 25 with the sealing plate 26 to rotate downwards for 90 degrees towards the direction away from the mounting plate 11 again, then the two electric sliding blocks 29 are controlled to move in the sliding groove 27 towards the mutual separating direction, and the scum or other sundries can be pushed to the two ends of the mounting plate 11 in a homeotropic mode, so that the scum or other sundries can be conveniently cleaned by subsequent staff.
After the preparation of the polyaluminium sulfate flocculant in the stirring barrel 1 is completed, the polyaluminium sulfate flocculant can be precipitated at the bottom of the stirring barrel 1, redundant waste water can be discharged from the drain pipe of the stirring barrel 1, the sealing cover 3 at the bottom of the stirring barrel 1 is taken down, two expansion plates 25 are controlled to rotate downwards through an external driving mechanism, the two expansion plates 25 can be automatically in an unfolding state after rotating downwards to more than 90 degrees, then the stretching of a pull rope 18 is controlled through an external winding mechanism, the mounting plate 11 is driven to move downwards to a position close to the stretching end of the second electric telescopic rod 9, the stretching end of the second electric telescopic rod 9 is controlled to retract, further the inserting block 20 at the stretching end is separated from the slot 21 at the top of the first stirring blade 10 until the inserting block 20 at the stretching end penetrates through the through groove 24 in the inside of the mounting plate 11 in the process of upwards moving, the motor 7 drives the second electric telescopic rod 9 to rotate by 90 degrees, the stretching end of the second electric telescopic rod 9 can push the mounting plate 11 and the expansion plates to stretch downwards, the two expansion plates can be in the state of the stretching end of the second electric telescopic rod 9 simultaneously, the stretching end of the second electric telescopic rod can push the mounting plate and the flocculating agent can be pushed by the flocculating agent 13, the polyaluminium sulfate flocculant can be conveniently extruded by the top of the polyaluminium sulfate flocculant 13, the polyaluminium sulfate flocculant can be conveniently extruded and the top of the polyaluminium sulfate flocculant can be simultaneously and the top of the polymer flocculant is 13 is extruded and the top 13 is located at the bottom 13.
The following describes the invention in further detail with reference to examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
Example 1:
COD of certain chemical wastewater is about 100mg/L, the turbidity of the water body is high, the water body is milky, certain brand PAC is respectively taken from the chemical wastewater, and the chemical wastewater is added with the self-made polyaluminium sulfate flocculant by the method, so that the treatment effect is compared.
Experiment one: taking 100ml of chemical wastewater, adding 1 per mill of certain brand PAC, adjusting the pH to 8-9, adding 1ppm of anionic PAM, stirring for 15min at 80r/min, standing for 15min after stirring is completed, observing the conditions of water and flocs, and measuring COD;
experiment II: taking 100ml of chemical wastewater, adding 1 per mill self-made polyaluminium sulfate flocculant, adjusting the pH to 8-9, adding 1ppm of anionic PAM, stirring for 15min at 80r/min, standing for 15min after stirring is completed, observing the conditions of water and flocs, and measuring COD.
The results of the two experimental treatments are compared in the following table:
| COD(mg/L) | turbidity conditions | Condition of flocs | |
| Experiment one | 88 | High removal rate and clear water body | The flocculation is compact, and the amount of the flocculation is small |
| Experiment two | 102 | High removal rate and clear water body | The flocculation is compact and the amount of the flocculation is moderate |
The experiment comparison shows that the self-made PAS has the same effect as the commodity in the removal of SS, and the produced floccules are compact, easy to precipitate and process and have slightly more floccules; the self-made PAS has no removal effect on COD basically, because the self-made PAS contains a certain amount of COD, the COD is introduced in the adding process, and although the removal effect on the COD possibly exists in the flocculation process, the adding and the removing are counteracted, so that the COD is unchanged.
The experiment proves that the self-made PAS has better flocculation and precipitation effect on chemical wastewater, and can be used for replacing commodity PAC.
Example 2:
the water body of the electroplating comprehensive wastewater is turbid and reddened, the COD is about 1000mg/L, and the electroplating comprehensive wastewater is respectively taken and added with a certain brand of PAC to be compared with the self-made polyaluminium sulfate flocculant by the method.
Experiment one: taking 100ml of electroplating comprehensive wastewater, adding 1 per mill of certain brand PAC, adjusting the pH to 8-9, adding 1ppm of anionic PAM, stirring for 15min at 80r/min, standing for 15min after stirring is completed, observing the conditions of water and flocs, and measuring COD;
experiment II: taking 100ml of electroplating comprehensive wastewater, adding 1 per mill self-made polyaluminium sulfate flocculant, adjusting the pH to 8-9, adding 1ppm of anionic PAM, stirring for 15min at 80r/min, standing for 15min after stirring is completed, observing the conditions of water and flocs, and measuring COD.
The results of the two experimental treatments are compared in the following table:
| COD(mg/L) | turbidity conditions | Condition of flocs | |
| Experiment one | 850 | High removal rate and clear water body | The flocculation is compact, and the amount of the flocculation is small |
| Experiment two | 1020 | Low removal rate and turbidity of water body | Loose and small amount of flocs |
For electroplating integrated wastewater, the treatment effect of self-made PAS is general, and the flocculation effect is basically not generated, and the possible reason is that PAS is invalid due to certain metal ions in the electroplating wastewater, so that the flocculation effect cannot be displayed.
Example 3:
the water body of the saponification wastewater is cloudy and white, the COD is about 600mg/L, the saponification wastewater is respectively taken and added with a certain brand PAC, and the method self-prepares the polyaluminum sulfate flocculant, and the treatment effect is compared.
Experiment one: taking 100ml of saponification wastewater, adding 1 per mill of certain brand PAC, adjusting the pH to 8-9, adding 1ppm of anionic PAM, stirring for 15min at 80r/min, standing for 15min after stirring is completed, observing the conditions of water and flocs, and measuring COD;
experiment II: taking 100ml of saponification wastewater, adding 1 per mill self-made polyaluminium sulfate flocculant, adjusting the pH to 8-9, adding 1ppm of anionic PAM, stirring for 15min at 80r/min, standing for 15min after stirring is completed, observing the conditions of water and flocs, and measuring COD.
The results of the two experimental treatments are compared in the following table:
| COD(mg/L) | turbidity conditions | Condition of flocs | |
| Experiment one | 545 | High removal rate and clear water body | The flocculation is compact, and the amount of the flocculation is small |
| Experiment two | 552 | High removal rate and clear water body | The flocculation is compact, and the amount of the flocculation is small |
The self-made PAS has excellent treatment effect on saponified wastewater, and the same treatment effect as that of commodity PAC is realized in three aspects of turbidity removal, floccule condition and COD removal.
The self-made PAS containing the aluminum acid wastewater has different flocculation performances when treating different wastewater, so that the PAS does not have very strong universality, the maximum treatment capacity of the PAS can be exerted aiming at specific wastewater, but the applicable wastewater also proves the feasibility of replacing a commercial flocculant, and the PAS has the advantage of lower cost, thus having great practical significance and economic value.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (10)
1. A method for preparing a polymeric aluminum sulfate flocculant by utilizing aluminum-containing acidic wastewater, which is characterized by comprising the following steps:
step one: and (3) distilling and concentrating: distilling the aluminum-containing acidic wastewater in a distillation device at normal temperature and normal pressure, stopping distilling when COD is concentrated to a preset concentration, and removing low-boiling-point organic matters in the wastewater;
step two: alkalization reaction: placing the concentrated aluminum-containing acidic wastewater in the first step into a reactor with controllable temperature and stirring, weighing a preset amount of alkalizing agent, adding a preset amount of water, dissolving and stirring to form an alkalizing agent solution, dropwise adding the alkalizing agent solution into the reactor, and stirring at a constant temperature to perform polymerization reaction;
step three: curing at constant temperature: and step two, after the polymerization reaction is finished, maintaining the temperature during the reaction, stopping stirring, curing, and filtering after curing is finished to obtain the polyaluminium sulfate flocculant.
2. The method for preparing a polymeric aluminum sulfate flocculant from an acidic wastewater containing aluminum according to claim 1, wherein in the distillation concentration stage, the concentration of COD concentration is in the range of 500 to 800mg/L.
3. The method for preparing a polymeric aluminum sulfate flocculant by using aluminum-containing acidic wastewater according to claim 1, wherein in the alkalization reaction stage, the alkalizing agent can be any one of NaOH, ca (OH) 2 and NaHCO3, and the molar ratio of the alkalizing agent to aluminum sulfate is 2-4.
4. The method for preparing a polymeric aluminum sulfate flocculant by using aluminum-containing acidic wastewater as claimed in claim 3, wherein in the alkalization reaction stage, the polymerization reaction temperature is 60-80 ℃, the stirring speed of the polymerization reaction is 80-120 r/min, the polymerization reaction time is 60-80 min, and a reactor used in the polymerization reaction is provided with a temperature-controllable stirring barrel (1).
5. The method for preparing a polymeric aluminum sulfate flocculant by utilizing aluminum-containing acidic wastewater as claimed in claim 1, wherein the curing time is 2-4 h in the constant-temperature curing stage.
6. The utility model provides a device that utilizes aluminium-containing acid waste water preparation polymeric aluminum sulfate flocculant, the device is applied to the preparation method in the preceding claim 4, and the device includes agitator (1) and base (2), a serial communication port, agitator (1) are installed at the top of base (2), roof (4) are installed at the top of agitator (1), storage bucket (5) are installed at its top, be equipped with first rabbling mechanism and second rabbling mechanism respectively in agitator (1) and storage bucket (5), the inside of agitator (1) still is equipped with and is used for handling the bubble except that bubble mechanism, except that bubble mechanism is including setting up mounting panel (11) in agitator (1) inside, the bottom symmetry of mounting panel (11) is provided with two outlet (22).
7. The device for preparing the polyaluminum sulfate flocculant by utilizing the aluminum-containing acidic wastewater according to claim 6, wherein the second stirring mechanism comprises a motor (7) arranged at the top of the storage barrel (5), a rotating shaft (8) is connected to the output end of the motor (7) and extends to the inside of the storage barrel (5), a plurality of second stirring blades (12) are arranged on the outer wall of the rotating shaft (8), a feeding hopper (6) is arranged at the top of the storage barrel (5) close to the motor (7), two through holes (17) are symmetrically formed in the bottom of the storage barrel (5), two sealing blocks (16) are arranged at the position, close to the two through holes (17), of the inner bottom surface of the storage barrel (5), a first electric telescopic rod (15) is arranged in the second stirring blade (12) at the bottommost end, and the extending end of the first electric telescopic rod (15) can be respectively abutted against the two sealing blocks (16) when in an extending state.
8. The device for preparing the polyaluminum sulfate flocculant by utilizing the aluminum-containing acidic wastewater according to claim 6, wherein the first stirring mechanism comprises a second electric telescopic rod (9), the second electric telescopic rod (9) is arranged in the stirring barrel (1), the bottom end of the rotating shaft (8) penetrates through the storage barrel (5) and the top plate (4) to be connected with the top end of the second electric telescopic rod (9), the bottom of the stirring barrel (1) is connected with a filter screen (13) through a plurality of third electric telescopic rods (19), a first stirring blade (10) is rotatably arranged at the central position of the top of the filter screen (13), a sealing cover (3) for sealing the filter screen (13) is further sleeved at the bottom of the stirring barrel (1), a slot (21) is formed in the top of the first stirring blade (10), and an inserting block (20) matched with the slot (21) is arranged at the extending end of the second electric telescopic rod (9).
9. The device for preparing the polyaluminum sulfate flocculant by utilizing the aluminum-containing acidic wastewater according to claim 6, wherein the mounting plate (11) is in sliding fit with the outer wall of the second electric telescopic rod (9), two stop blocks (23) are arranged on the outer wall of the second electric telescopic rod (9), through grooves (24) matched with the two stop blocks (23) are formed in the mounting plate (11), the telescopic plates (25) are hinged to opposite ends of the mounting plate (11), the two telescopic plates (25) are in a semicircular telescopic plate (25) when in an extending and unfolding state, two sealing plates (26) are arranged on one side, close to the mounting plate (11), of one telescopic plate (25), and the two sealing plates (26) can be used for sealing two water outlets (22) respectively.
10. The device for preparing the polyaluminum sulfate flocculant by utilizing the aluminum-containing acidic wastewater according to claim 9, wherein two sliding grooves (27) are symmetrically formed in the top of the mounting plate (11) close to the water outlet (22), two electric sliding blocks (29) are arranged at two ends of each sliding groove (27), movable plates (28) are arranged at the tops of the two electric sliding blocks (29), pull ropes (18) are connected to the tops of the two movable plates (28), and one ends, far away from the two movable plates (28), of the two pull ropes (18) are connected with an external winding mechanism.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117414624A (en) * | 2023-12-19 | 2024-01-19 | 江苏科跃过滤设备有限公司 | Residue-preventing filter equipment based on bio-pharmaceuticals |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117414624A (en) * | 2023-12-19 | 2024-01-19 | 江苏科跃过滤设备有限公司 | Residue-preventing filter equipment based on bio-pharmaceuticals |
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