CN111499144B - River sludge pollution control conditioning device and method - Google Patents
River sludge pollution control conditioning device and method Download PDFInfo
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- CN111499144B CN111499144B CN202010336063.XA CN202010336063A CN111499144B CN 111499144 B CN111499144 B CN 111499144B CN 202010336063 A CN202010336063 A CN 202010336063A CN 111499144 B CN111499144 B CN 111499144B
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/15—Treatment of sludge; Devices therefor by de-watering, drying or thickening by treatment with electric, magnetic or electromagnetic fields; by treatment with ultrasonic waves
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Abstract
The invention provides a river sludge pollution control conditioning device and method for realizing efficient mud-water separation. The utility model provides a river course silt accuse dirty device of taking care of, locates the supersound conditioner of shell body inner chamber including the shell body that has the inner chamber and cover, inner chamber between shell body and the supersound conditioner is equipped with the subregion baffle that sets up along the shell body axial, and supersound conditioner and subregion baffle divide the shell body inner chamber into supersound conditioning district, medicament conditioning district and muddy water separation zone from inside to outside in proper order. The spiral-flow field of the ultrasonic conditioner of the invention separates sludge particles with different particle sizes, and utilizes ultrasonic cavitation and mechanical action to break flocs and colloids in river sludge, so that the viscosity of the sludge is reduced by ultrasonic energy, and the dehydration performance is improved.
Description
Technical Field
The invention relates to a sludge control device and a sludge control method, in particular to a river sludge control and conditioning device and a river sludge control and conditioning method, and belongs to the technical field of environmental protection engineering.
Background
According to the publication of ecological environmental conditions in 2018, in 1935 water quality sections (point positions) monitored by surface water in China, the proportion of I to III is 71.0 percent, which is increased by 3.1 percent compared with 2017, and the proportion of inferior V is 6.7 percent and is reduced by 1.6 percent compared with 2017. Therefore, the water environment pollution treatment is one of the important contents of the environment pollution treatment, on the basis of confirming the early treatment effect, the whole water environment problem is still serious, and the pollution treatment of the river and lake water environment is still not slow.
The river water environment pollution treatment is to remove the internal pollution of the river besides strictly controlling the discharge of external pollution, and the desilting is one of the most common engineering measures for the river pollution treatment. The river sludge is the result of long-term direct deposition of a large amount of exogenous pollutants in a water body without degradation, wherein the pollutants are gradually deposited after a series of physical and biochemical actions, so that the river sludge is changed into an aggregation reservoir of pollutants such as nutrients, persistent organic matters, heavy metals and the like. When the exogenous pollution of the river water body is cut off, a large amount of pollutants accumulated in the sludge can be released to the water body again to become the endogenous source of the river pollution.
China mainly treats the endogenous pollution of a river channel through an environment-friendly dredging technology, obtains remarkable social and environmental benefits, but also has some problems, wherein the dehydration and drying treatment of dredging bottom mud is a great problem in environment-friendly dredging. The river sludge is quickly and effectively controlled and conditioned before dehydration and drying treatment, so that the pollution degree and the dehydration performance of the river sludge are improved, and the subsequent treatment efficiency of the sludge is improved.
At present, the main sludge conditioning methods comprise a chemical method, a physical method, a biological method and a combined method. Among them, chemical and physical methods are widely used. The conditioning agents used by the chemical method mainly comprise organic polymeric flocculant, inorganic flocculating agent (aluminum salt and ferric salt) and partial surfactant, but the cost of the flocculant is high, the conditioning cost of the chemical agent is high, the conditioning dosage of the chemical agent is large, the dehydration performance of the sludge is easily reduced sharply, and secondary pollution is generated; the physical method is a method for changing the performance of the sludge by external energy or stress, and the physical methods which are widely applied at present comprise microwave heating and ultrasonic conditioning. The ultrasonic wave is used for sludge control conditioning, the cavitation effect of the ultrasonic wave is utilized to change the characteristics of liquid and solid substances in water, and the generated heat action, sponge action and the like can accelerate the solid-liquid separation speed, so that the dehydration effect of the sludge is improved, but the energy consumption for adjusting the sludge by adopting the ultrasonic wave technology is larger; the combined method is a combined conditioning method by two or more technologies, and compared with a single chemical method and a single physical method, the combined method can reduce the dosage of the flocculating agent and can reduce the energy consumption in the physical conditioning.
In the biochemical sludge dewatering and reduction research field, more research reports are provided for sludge dewatering by utilizing ultrasonic waves, the cavitation of the ultrasonic waves in water can break down sludge flocs, even zoogloea and cell bodies, the bound water in the sludge can be converted into free water which is easy to remove in a mechanical mode, and the free water is concerned about the stability, cleanness, safety and other properties of the free water, but the research reports are provided in the research fields of river channel sludge pollution control, dewatering and reduction. The patent with publication number CN102120682A provides a method for adding a flocculating agent, performing ultrasonic treatment and finally dehydrating by using a soil engineering pipe bag in the sludge pipeline conveying process, which has the effects of large treatment capacity and low cost, but in the method, the heavy sludge flocs formed by adding the flocculating agent before the ultrasonic treatment can be broken, the pollution of heavy metal ions released and dissolved in the river sludge conditioning process and the like is not considered, and the conditioning effect is reduced. The patent publication No. CN1016189336A provides a method for dewatering sludge by combining ultrasound and polyaluminium sulfate flocculant, which achieves a good dewatering effect, but the method does not aim at the property of river sludge, and the intermittent operation is not beneficial to the continuous conditioning treatment of a large amount of river sludge.
Therefore, how to realize the high-efficiency sludge-water separation and control the pollutants in the river sludge dehydration is also a key problem for solving the problems of high-efficiency sludge dehydration and secondary pollution control by technical personnel in the field.
Disclosure of Invention
The invention aims to provide a river sludge pollution control conditioning device for realizing efficient mud-water separation, and solves the problems in the background technology.
The invention also aims to provide a river sludge pollution control conditioning method for realizing efficient sludge-water separation.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a river course silt accuse dirty recuperation device, locates the supersound conditioner of shell body inner chamber including the shell body that has the inner chamber and cover, inner chamber between shell body and the supersound conditioner is equipped with along the subregion baffle of shell body axial setting, and supersound conditioner and subregion baffle divide the shell body inner chamber into supersound recuperation district, medicament recuperation district and mud-water separation district from inside to outside in proper order, the supersound conditioner includes interior casing and ultrasonic transducer, and interior casing sets up along the shell body axial, and interior casing encircles the supersound recuperation district, and interior casing top is equipped with the overflow mouth, and interior casing upper portion is equipped with the inlet pipe, and interior casing bottom is equipped with the underflow mouth, forms the concentrated district of silt between underflow mouth and the shell body inner chamber end of the cavity, and ultrasonic transducer locates in the interior casing conch wall, and ultrasonic transducer's output is towards supersound recuperation district.
Preferably, the bottom end of the outer shell is provided with a sludge discharge port, the side wall of the upper part of the outer shell is provided with a water outlet, the top end of the outer shell is provided with an exhaust port, and the top of the sludge-water separation area is provided with a sludge level meter and an exhaust valve.
Preferably, the inner shell comprises an upper shell, a middle shell and a lower shell, the upper shell and the lower shell are cones with open ends, the middle shell is a cylinder, and the ultrasonic transducers are uniformly arranged in the shell wall of the middle shell and the shell wall of the lower shell in an annular shape.
Preferably, the included angle between the shell wall of the upper section of the shell and the horizontal plane is 30-45 degrees, and the included angle between the shell wall of the lower section of the shell and the horizontal plane is 60-80 degrees.
Preferably, an overflow short pipe facing the ultrasonic conditioning area is arranged at the overflow port of the inner shell, the ratio of the diameter of the overflow short pipe to the insertion depth of the overflow short pipe in the inner shell is 0.65-0.75, the ratio of the height of the inner shell to the insertion depth of the overflow short pipe in the inner shell is 3.5-4.0, and the ratio of the diameter of the underflow port to the diameter of the overflow short pipe is 1.1-1.2.
Preferably, the feeding pipe is tangentially connected with the wall of the inner shell and communicated with the ultrasonic conditioning area, the top of the inner shell is provided with a polyaluminium chloride annular dosing pipe and a polyacrylamide annular dosing pipe, and the outer side of the bottom of the inner shell is provided with a heavy metal ion chelating agent annular dosing pipe.
Preferably, a plurality of annular flow guide inclined plates which are uniformly distributed are arranged at the bottoms of the medicament conditioning area and the mud-water separation area, and the annular flow guide inclined plates face the sludge concentration area.
Preferably, the included angle between the annular diversion inclined plate and the horizontal plane is 50-70 degrees.
A method for regulating and controlling the sludge of a river by adopting the sludge regulating and controlling device for the river sludge comprises the following specific steps:
(1) pumping the river sludge to be conditioned after primary screening and filtering into an ultrasonic conditioning area through a feeding pipe at an inlet flow speed of 8.0-12.0 m/s under an operating pressure of 0.2-0.3 MPa, starting an ultrasonic transducer for ultrasonic conditioning, breaking the sludge into sludge flocs under the action of ultrasonic cavitation and mechanical action, converting internal combined water and capillary combined water in the sludge into free water, oxidizing and degrading released partial organic matters, desorbing partial heavy metal ions and nitrogen and phosphorus elements attached to the surfaces of sludge particles, throwing larger-particle sludge in the ultrasonic conditioning area to the inner wall of the inner shell and moving downwards along the inner wall under the action of a cyclone field, discharging heavy sludge from a underflow outlet after extrusion and aggregation into a heavy sludge concentration area, and moving smaller-particle sludge in the ultrasonic conditioning area to the center of the inner cavity of the inner shell and moving upwards along the radial direction, the light sludge is discharged from the overflow port and enters the medicament conditioning area;
(2) adding polyaluminium chloride and polyacrylamide to the top of the agent conditioning area, allowing the light sludge to enter the agent conditioning area through an overflow port, allowing the light sludge to move downwards at a flow expanding and speed reducing speed, mixing the light sludge with the polyaluminium chloride and the polyacrylamide in sequence for flocculation to form large-particle heavy sludge, and allowing the heavy sludge to enter a sludge concentration area after sedimentation;
(3) adding a heavy metal ion chelating agent to the bottom of the medicament conditioning area to fix heavy metal ions in the sludge turbid liquid;
(4) and sludge slurry enters the sludge-water separation area to be subjected to sludge-water separation, effluent is discharged from the upper part of the sludge-water separation area, and sludge is discharged from the bottom of the sludge concentration area.
Preferably, in the step (1), the frequency of the ultrasonic transducer is 20-60 kHz, the power of the ultrasonic transducer is 0.02-3 kw, the sound energy density of the ultrasonic transducer is 0.15-0.5 w/mL, the action time of the ultrasonic transducer is 0.2-2.0 min, in the step (2), the adding amount of the polyaluminium chloride is 1-2 g/L, and the adding amount of the polyacrylamide is 20-30 mg/L.
The invention has the beneficial effects that:
compared with the prior art, the river sludge pollution control conditioning device and the method have the advantages that,
(1) the invention utilizes the action of the cyclone field of the ultrasonic conditioner to separate sludge particles with different particle sizes, larger particle sludge is gathered along the inner wall to move downwards under the action of the cyclone field, and smaller particle sludge moves to the center towards the center and moves upwards, thereby realizing the differential pre-separation of the water content and the particle size of the sludge;
(2) according to the invention, by utilizing ultrasonic cavitation and mechanical action, flocs and colloids in river sludge are broken, so that the internal combined water and capillary combined water are converted into free water, meanwhile, the viscosity of the sludge is reduced by ultrasonic energy, and the dehydration performance is increased;
(3) according to the invention, microorganisms, natural flocs and colloids in the river sludge can be broken by utilizing the ultrasonic cavitation effect, organic pollutants, ammonia nitrogen, phosphate ions and heavy metal ions in the sludge are released, and ions and pollutants dissolved out of water are removed by adding a medicament, so that the purpose of controlling secondary pollution in the subsequent dehydration process is achieved;
(4) the sludge can be ensured to be in a rotational flow state in the ultrasonic conditioning cavity by utilizing the characteristics of the rotational flow field, the mechanical stirring function is replaced, meanwhile, the speed, the pressure and the solid volume distribution characteristics of the sludge in the horizontal direction in the conditioning cavity are coupled with the ultrasonic sound intensity and the standing wave characteristics, the sound intensity change at different positions can be realized without changing the sound intensity outside, and the energy can be saved by 30-40% under the same conditioning effect;
(5) the invention utilizes ultrasonic coupling agent to condition river sludge, can obviously improve the sludge dehydration performance, and can convert the river sludge which is difficult to be dehydrated (the sludge specific resistance value is 1.00 multiplied by 10)9～1.00×1010s2The/g) is converted into the easily dehydrated sludge (the specific resistance of the sludge is 0.50 multiplied by 10)9～1.00×109s2A/g) and readily dewaterable sludge (specific sludge resistance value less than 0.40X 109s2The/g) is convenient for the subsequent further dehydration and drying treatment of the sludge,
(6) the invention utilizes ultrasonic wave coupling agent conditioning to release part of pollutants such as heavy metal ions, phosphate ions and the like attached to the solid sludge into the liquid water again, and generates solid substances to be separated out after being combined with the added agent, thereby not only reducing the pollution degree of the discharged water, but also avoiding the dissolution of the pollutants in sludge dewatering filtrate and playing a role in controlling the pollution.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a cross-sectional view of section A-A of FIG. 1;
fig. 3 is a schematic diagram of the structure of the ultrasonic conditioner of the invention.
In the figure: 10. a feed inlet, 11, a feed pipe, 13, an overflow short pipe, 14, an overflow port, 15, a bottom flow port, 17, a sludge discharge port, 16, a water outlet, 18, an exhaust port, 20, a polymeric aluminum chloride dosing port, 21, a polyacrylamide dosing port, 22, a heavy metal ion chelating agent dosing port, 23, a polymeric aluminum chloride annular dosing pipe, 24, a polyacrylamide annular dosing pipe, 25, a heavy metal ion chelating agent annular dosing pipe, 26, a conical guide plate, 27, an annular guide sloping plate, 30, an outer shell, 31, a support, 32, a partition plate, 40, an ultrasonic conditioner, 42, an inner shell, 43, an ultrasonic transducer, 110, a mud level meter, 111, an exhaust valve, 112, a control box, 421, an upper shell, 422, a middle shell, 423, a lower shell, alpha, an included angle between the upper shell and a horizontal plane, beta, an included angle between the lower shell and the horizontal plane, the included angle between the gamma and annular flow guide inclined plates and the horizontal plane, an ultrasonic conditioning area A, an ultrasonic conditioning area B, a medicament conditioning area, a sludge-water separation area C, a sludge-water concentration area D, a sludge concentration area D1Diameter of the overflow pipe stub, D2The diameter of the underflow opening, the insertion depth of the L overflow short pipe in the inner shell, and the height of the H inner shell.
Detailed Description
The technical solution of the present invention is further specifically described below by way of specific examples in conjunction with the accompanying drawings. It is to be understood that the practice of the invention is not limited to the following examples, and that any variations and/or modifications may be made thereto without departing from the scope of the invention.
In the present invention, all parts and percentages are by weight, unless otherwise specified, and the equipment and materials used are commercially available or commonly used in the art. The methods in the following examples are conventional in the art unless otherwise specified. The components or devices in the following examples are, unless otherwise specified, standard parts or parts known to those skilled in the art, the structure and principle of which are known to those skilled in the art through technical manuals or through routine experimentation.
Example (b):
fig. 1 and fig. 2 show a river silt accuse dirty recuperation device, including the outer casing 30 that has the inner chamber and the ultrasonic conditioner 40 of cover locating the outer casing inner chamber, the outer casing bottom is equipped with support 31 that plays supporting role, the inner chamber between outer casing and the ultrasonic conditioner is equipped with the subregion baffle 32 along outer shell axial setting, ultrasonic conditioner and subregion baffle divide the outer casing inner chamber into ultrasonic conditioning district a from inside to outside in proper order, medicine conditioning district B and mud-water separation district C, ultrasonic conditioner includes interior casing 42 and ultrasonic transducer 43, interior casing sets up along the outer shell axial, interior casing encircles ultrasonic conditioning district, interior casing top is equipped with overflow mouth 14, interior casing upper portion is equipped with inlet pipe 11, the tip that stretches out outside the outer casing is inlet pipe 10. The bottom of the inner shell is provided with a underflow port 15, a sludge concentration area D is formed between the underflow port and the cavity bottom of the inner cavity of the outer shell, the ultrasonic conditioning area is communicated with the medicament conditioning area through an overflow port, and the ultrasonic conditioning area is communicated with the sludge concentration area through the underflow port. The ultrasonic transducers are arranged in the wall of the inner shell and are arranged along the ring at equal intervals, the intervals are 10-15 cm, and the output ends of the ultrasonic transducers face the ultrasonic conditioning area.
The bottom end of the outer shell is provided with a sludge discharge hole 17, the side wall of the upper part of the outer shell is provided with a water outlet 16, the top end of the outer shell is provided with an exhaust port 18, and the top of the sludge-water separation area is provided with a sludge level meter 110 and an exhaust valve 111.
As shown in fig. 3, the inner housing includes an upper housing 421, a middle housing 422, and a lower housing 423, the upper housing and the lower housing are cones with open ends, the middle housing is a cylinder, and the ultrasonic transducers are uniformly arranged in the middle housing wall and the lower housing wall in an annular shape. The angle alpha between the shell wall of the upper section of the shell and the horizontal plane is 30-45 degrees, in the embodiment, the angle alpha is 30 degrees, the angle beta between the shell wall of the lower section of the shell and the horizontal plane is 60-80 degrees, and in the embodiment, the angle beta is 80 degrees.
An overflow short pipe 13 facing the ultrasonic conditioning area is arranged at the overflow port of the inner shell, the overflow short pipe is of a thin-wall straight circular pipe structure, and the position of the bottom port of the overflow short pipe is lower than the position of the feed inlet of the feed pipe. Diameter D of overflow short pipe1The ratio D of the insertion depth L of the overflow stub in the inner housing10.65 to 0.75, 0.70 in this embodiment, a ratio H/L of a height H of the inner housing to an insertion depth L of the overflow stub pipe in the inner housing is 3.5 to 4.0, 4.0 in this embodiment, and a diameter D of the underflow port2Diameter D of short overflow pipe1Ratio of D2/D11.1 to 1.2, and 1.2 in this embodiment.
The feeding pipe is tangentially connected with the wall of the inner shell and communicated with the ultrasonic conditioning area, the top of the inner shell is provided with a polyaluminium chloride annular dosing pipe 23 and a polyacrylamide annular dosing pipe 24, and the outer side of the bottom of the inner shell is provided with a heavy metal ion chelating agent annular dosing pipe 25. The polyaluminium chloride annular dosing pipe and the polyacrylamide annular dosing pipe are respectively concentrically and horizontally erected on the surface of the upper section shell with the short overflow pipe, and a conical guide plate 26 is formed on the surface of the upper section shell. The poly aluminum chloride annular medicine feeding pipe extends out of the outer shell body through a section of horizontal medicine feeding pipe, the end part of the poly aluminum chloride annular medicine feeding pipe is provided with a poly aluminum chloride medicine feeding port 20, the polyacrylamide annular medicine feeding pipe extends out of the outer shell body through a section of horizontal medicine feeding pipe, and the end part of the poly aluminum chloride annular medicine feeding pipe is provided with a polyacrylamide medicine feeding port 21. The heavy metal ion chelating agent annular dosing pipe and the underflow port are concentrically and horizontally erected at the bottom end of the annular flow guide inclined plate. The annular dosing tube of the heavy metal ion chelating agent extends out of the outer shell body through a section of vertical dosing tube, and the end part of the annular dosing tube is provided with a dosing port 22 of the heavy metal ion chelating agent. The lower half circumference of the cross sections of all the annular dosing tubes is symmetrically perforated, hole sites are arranged at equal intervals along the annular cross sections, the interval is 10-15 cm, and the diameter of each hole is 4-6 mm.
The bottom of the medicament conditioning area and the bottom of the mud-water separation area are provided with a plurality of annular flow guide sloping plates 27 which are uniformly arranged, the annular flow guide sloping plates face the mud concentration area, and the included angle gamma between the annular flow guide sloping plates and the horizontal plane is 50-70 degrees.
The river sludge pollution control conditioning device is also provided with a control box 112 for controlling the start, stop and adjustment of the feeding pump, the dosing pump and the ultrasonic generator.
A method for regulating and controlling the sludge of a river by adopting the sludge regulating and controlling device for the river sludge comprises the following specific steps:
(1) pumping the river sludge to be conditioned after primary screening and filtering into an ultrasonic conditioning area through a feeding pipe at an inlet flow speed of 8.0-12.0 m/s under an operating pressure of 0.2-0.3 MPa, starting an ultrasonic transducer for ultrasonic conditioning, breaking the sludge into sludge flocs under the action of ultrasonic cavitation and mechanical action, converting internal combined water and capillary combined water in the sludge into free water, oxidizing and degrading released partial organic matters, desorbing partial heavy metal ions and nitrogen and phosphorus elements attached to the surfaces of sludge particles, throwing larger-particle sludge in the ultrasonic conditioning area to the inner wall of the inner shell and moving downwards along the inner wall under the action of a cyclone field, discharging heavy sludge from a underflow outlet after extrusion and aggregation into a heavy sludge concentration area, and moving smaller-particle sludge in the ultrasonic conditioning area to the center of the inner cavity of the inner shell and moving upwards along the radial direction, the light sludge is discharged from the overflow port and enters the medicament conditioning area;
(2) adding polyaluminium chloride and polyacrylamide to the top of the agent conditioning area, allowing the light sludge to enter the agent conditioning area through an overflow port, allowing the light sludge to move downwards at a flow expanding and speed reducing speed, mixing the light sludge with the polyaluminium chloride and the polyacrylamide in sequence for flocculation to form large-particle heavy sludge, and allowing the heavy sludge to enter a sludge concentration area after sedimentation;
(3) adding a heavy metal ion chelating agent to the bottom of the medicament conditioning area to fix heavy metal ions in the sludge turbid liquid;
(4) and sludge slurry enters the sludge-water separation area to be subjected to sludge-water separation, effluent is discharged from the upper part of the sludge-water separation area, and sludge is discharged from the bottom of the sludge concentration area.
In the step (1), the frequency of the ultrasonic transducer is 20-60 kHz, the power of the ultrasonic transducer is 0.02-3 kw, the sound energy density of the ultrasonic transducer is 0.15-0.5 w/mL, the action time of the ultrasonic transducer is 0.2-2.0 min, in the step (2), the adding amount of polyaluminium chloride is 1-2 g/L, and the adding amount of polyacrylamide is 20-30 mg/L. The heavy metal ion chelating agent is potassium diisopropyl dithiophosphate, and the adding amount is 2%.
The effect of this example on river sludge after controlled-fouling conditioning is shown in table 1.
TABLE 1 river sludge pollution control Conditioning Effect
The above-described embodiment is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the invention as set forth in the claims.
Claims (10)
1. The utility model provides a dirty device of taking care of river silt accuse which characterized in that: the river sludge pollution control conditioning device comprises an outer shell with an inner cavity and an ultrasonic conditioner sleeved in the inner cavity of the outer shell, the inner cavity between the outer shell and the ultrasonic conditioner is provided with a partition plate which is arranged along the axial direction of the outer shell, the ultrasonic conditioner and the partition plate divide the inner cavity of the outer shell into an ultrasonic conditioning area, a medicament conditioning area and a mud-water separation area from inside to outside in sequence, ultrasonic conditioner includes interior casing and ultrasonic transducer, and interior casing sets up along the shell body axial, and interior casing encircles the ultrasonic conditioning district, and interior casing top is equipped with the overflow mouth, and interior casing upper portion is equipped with the inlet pipe, and interior casing bottom is equipped with the underflow mouth, forms silt concentrated area between underflow mouth and the shell body inner chamber bottom of the cavity, and ultrasonic transducer locates in the interior casing wall, and ultrasonic transducer's output is towards the ultrasonic conditioning district, the inlet pipe is the tangential and connects interior casing wall and feed through the ultrasonic conditioning district.
2. The river sludge pollution control conditioning device according to claim 1, characterized in that: the mud level meter is arranged at the top of the mud-water separation area.
3. The river sludge pollution control conditioning device according to claim 1, characterized in that: the inner shell comprises an upper shell, a middle shell and a lower shell, the upper shell and the lower shell are cones with open ends, the middle shell is a cylinder, and the ultrasonic transducers are uniformly arranged in the shell wall of the middle shell and the shell wall of the lower shell in an annular mode.
4. The river sludge pollution control and conditioning device according to claim 3, wherein the sludge pollution control and conditioning device comprises: the included angle between the shell wall of the upper section of the shell and the horizontal plane is 30-45 degrees, and the included angle between the shell wall of the lower section of the shell and the horizontal plane is 60-80 degrees.
5. The river sludge pollution control conditioning device according to claim 1, characterized in that: the overflow port of the inner shell is provided with an overflow short pipe facing the ultrasonic conditioning area, the ratio of the diameter of the overflow short pipe to the insertion depth of the overflow short pipe in the inner shell is 0.65-0.75, the ratio of the height of the inner shell to the insertion depth of the overflow short pipe in the inner shell is 3.5-4.0, and the ratio of the diameter of the bottom flow port to the diameter of the overflow short pipe is 1.1-1.2.
6. The river sludge pollution control conditioning device according to claim 1, characterized in that: the top of the inner shell is provided with a polyaluminium chloride annular dosing pipe and a polyacrylamide annular dosing pipe, and the outer side of the bottom of the inner shell is provided with a heavy metal ion chelating agent annular dosing pipe.
7. The river sludge pollution control conditioning device according to claim 1, characterized in that: the bottom of the medicament conditioning area and the bottom of the mud-water separation area are provided with a plurality of annular flow guide inclined plates which are uniformly distributed, and the annular flow guide inclined plates face the mud concentration area.
8. The river sludge pollution control and conditioning device according to claim 7, wherein: the included angle between the annular flow guide inclined plate and the horizontal plane is 50-70 degrees.
9. A method for sludge control and conditioning of river channel by using the sludge control and conditioning device of any one of claims 1 to 8, which is characterized in that: the method comprises the specific steps of,
(1) under the operation pressure of 0.2-0.3 MPa, the river sludge to be conditioned after primary screening and filtration, pumping the sludge into an ultrasonic conditioning area through a feed pipe at an inlet flow rate of 8.0-12.0 m/s, starting an ultrasonic transducer to perform ultrasonic conditioning, breaking the sludge into sludge flocs under the action of ultrasonic cavitation and machinery, converting internal combined water and capillary combined water in the sludge into free water, meanwhile, part of organic matters released by oxidative degradation desorb part of heavy metal ions and nitrogen and phosphorus elements attached to the surfaces of sludge particles, larger particle sludge in the ultrasonic conditioning area is thrown to the inner wall of the inner shell under the action of a cyclone field and moves downwards along the inner wall, the sludge is discharged from a bottom flow port into heavy sludge to enter a sludge concentration area after being extruded and gathered, and smaller particle sludge in the ultrasonic conditioning area moves to the center of the inner cavity of the inner shell along the radial direction and moves upwards, and the sludge is discharged from an overflow port into light sludge to enter a medicament conditioning area;
(2) adding polyaluminium chloride and polyacrylamide to the top of the agent conditioning area, allowing the light sludge to enter the agent conditioning area through an overflow port, then allowing the light sludge to flow in a flow expanding and speed reducing manner to move downwards, mixing the light sludge with the polyaluminium chloride and the polyacrylamide in sequence for flocculation to form heavy sludge with larger particles, and allowing the heavy sludge to enter a sludge concentration area after sedimentation;
(3) adding a heavy metal ion chelating agent to the bottom of the agent conditioning area to fix heavy metal ions in the sludge turbid liquid;
(4) and sludge slurry enters the sludge-water separation area to be subjected to sludge-water separation, effluent is discharged from the upper part of the sludge-water separation area, and sludge is discharged from the bottom of the sludge concentration area.
10. The river sludge pollution control conditioning method according to claim 9, characterized in that: in the step (1), the frequency of the ultrasonic transducer is 20-60 kHz, the power of the ultrasonic transducer is 0.02-3 kw, the sound energy density of the ultrasonic transducer is 0.15-0.5 w/mL, and the action time of the ultrasonic transducer is 0.2-2.0 min; in the step (2), the adding amount of the polyaluminum chloride is 1-2 g/L, and the adding amount of the polyacrylamide is 20-30 mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010336063.XA CN111499144B (en) | 2020-04-25 | 2020-04-25 | River sludge pollution control conditioning device and method |
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| KR20200001898A (en) * | 2018-06-28 | 2020-01-07 | 주식회사 디에이치 | sludge treatment apparatus using ultrasonic wave |
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| JP2003159599A (en) * | 2001-11-27 | 2003-06-03 | Nishihara Environ Sanit Res Corp | Sludge treatment system |
| JP2003290800A (en) * | 2002-03-29 | 2003-10-14 | Maezawa Ind Inc | Method and apparatus for treating sludge |
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| KR20200001898A (en) * | 2018-06-28 | 2020-01-07 | 주식회사 디에이치 | sludge treatment apparatus using ultrasonic wave |
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