CN110683624B - Sewage dephosphorization material, preparation method and application of dephosphorization material - Google Patents
Sewage dephosphorization material, preparation method and application of dephosphorization material Download PDFInfo
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- CN110683624B CN110683624B CN201910973791.9A CN201910973791A CN110683624B CN 110683624 B CN110683624 B CN 110683624B CN 201910973791 A CN201910973791 A CN 201910973791A CN 110683624 B CN110683624 B CN 110683624B
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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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
Abstract
The invention belongs to the technical field of sewage treatment materials, preparation and application thereof, and particularly relates to a preparation method and application of a sewage dephosphorization material and a dephosphorization material. The sewage dephosphorization material is obtained by utilizing various raw materials with good dephosphorization effect and rich sources through a certain proportion. The preparation method has the advantages of simple process flow and lower manufacturing cost, the cyclic reaction of the materials obviously reduces the cost of sewage treatment, effectively reduces the loss of human resources, material resources and economic resources, and is suitable for industrial production and popularization. The application device has simple structure and convenient manufacture, can carry out the circulating reciprocating reaction, and reduces the cost of the sewage treatment process. The sewage dephosphorization material can be used for treating the sewage with the overproof phosphorus in a wider concentration range.
Description
Technical Field
The invention belongs to the technical field of sewage treatment materials, preparation and application thereof, and particularly relates to a preparation method and application of a sewage dephosphorization material and a dephosphorization material.
Background
With the rapid development of the phosphating industry, the generated environmental pollution devices are also increasingly serious. Phosphorus is used as one of main indexes for controlling water body pollution, and the main sources of the phosphorus pollution are abuse of phosphorus-containing detergents, agricultural phosphorus-containing fertilizers enter water bodies through surface runoff and the like, so that the phosphorus-containing detergents become one of main reasons for water body eutrophication, and the control of over-standard discharge of phosphorus-containing wastewater is significant.
Phosphorus is used as a biological limiting nutrient element and can cause harm when the content exceeds the standard, the concentration of phosphorus in the sewage discharge standard is strictly controlled, and the first-class A discharge limit value of the pollutant discharge standard of urban sewage plants (GB18918-2002) is 0.5mg/L, and the first-class B discharge limit value is 1 mg/L. The existing water treatment process often has the condition of excessive phosphorus.
The common dephosphorization process mainly comprises a biochemical method, a physical adsorption method, a chemical method and the like, wherein the biochemical method is to degrade phosphorus in a water body by using microorganisms, needs to strictly control reaction conditions and has weak impact resistance; the physical adsorption method can adsorb phosphorus in water, but the adsorbent is easy to saturate, and the regeneration cost of the adsorption material is high; the chemical method has obvious effect, is generally used for tail end treatment, is a short-term treatment mode, has relatively high chemical agent cost and can cause secondary pollution.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a sewage dephosphorization material, a preparation method of the dephosphorization material and an application of the dephosphorization material.
The technical scheme adopted by the invention is as follows: the phosphorus removal material for sewage is mainly prepared from the following raw materials in parts by mass:
80-200 parts of diatomite powder, 70-110 parts of iron powder, 180 parts of activated clay and 3-8 parts of wetting agent;
preferably, the phosphorus removal material is mainly prepared from the following raw materials in parts by mass:
100-180 parts of diatomite powder, 70-110 parts of iron powder, 100-180 parts of activated clay and 3-8 parts of wetting agent;
further preferably, the phosphorus removal material is mainly prepared from the following raw materials in parts by mass:
150 parts of diatomite powder, 100 parts of iron powder, 150 parts of activated clay and 5 parts of wetting agent.
The sewage dephosphorization material is obtained by utilizing various raw materials with good dephosphorization effect and rich sources through a certain proportion. The sewage dephosphorization material not only can effectively remove the phosphorus in the sewage, but also is suitable for the upgrading and reconstruction process at the tail end of a sewage treatment plant. The sewage dephosphorization material can be used for treating the sewage with the overproof phosphorus in a wider concentration range.
A preparation method of a sewage dephosphorization material comprises the following steps:
(1) primary granulation: selecting diatomite powder and iron powder according to a corresponding proportion, uniformly mixing to obtain mixed powder, adding a wetting agent for granulation to obtain spherulites I;
(2) and (3) secondary granulation: uniformly mixing the spherulites I obtained in the step (1) with activated clay selected according to a corresponding proportion to obtain mixed powder, and adding a wetting agent for granulation to obtain spherulites II;
(3) alternate coating and granulation: uniformly mixing the spherulites II obtained in the step (2) with the mixed powder in the step (1) for granulation, then uniformly mixing the mixture with the activated clay in the step (2) for granulation, and then repeating the steps for alternate coating granulation to obtain final spherulites with a multilayer structure;
(4) preparing a finished product: and (4) drying and sintering the final pellets obtained in the step (3), and cooling to room temperature to obtain a finished product.
According to the preparation method of the sewage dephosphorization material, after the spherulites I and II are respectively obtained, alternate coating granulation processes are carried out for multiple times, so that the dephosphorization material with the multilayer structure is obtained. The alternative coating granulation proposed in the preparation process refers to that spherulites II are added into the mixed powder in the step (1) for granulation, and then added into the activated clay in the step (2) for granulation, namely the spherulites II are coated with a layer of mixed powder, then coated with a layer of activated clay, and then coated alternately for multiple times to obtain the phosphorus removal material with the multilayer structure.
The structure can promote the activity regeneration capability of the phosphorus removal material when the phosphorus removal material is contacted with sewage, has simple regeneration conditions, and does not need to put the phosphorus removal material for many times in the sewage treatment process. The preparation method has the advantages of simple process flow and lower manufacturing cost, the cyclic reaction of the materials obviously reduces the cost of sewage treatment, effectively reduces the loss of human resources, material resources and economic resources, and is suitable for industrial production and popularization.
Preferably, the wetting agent in step (1) and step (2) comprises an aqueous solution of a soluble lanthanum salt;
preferably, the soluble lanthanum salt aqueous solution comprises an aqueous lanthanum chloride solution and/or an aqueous lanthanum nitrate solution.
Preferably, the coating frequency of the alternate coating granulation with the mixed powder in the step (3) is 4 to 10 times, preferably 5 to 8 times, and further preferably 6 to 7 times;
preferably, the number of coating times for alternately coating and granulating with activated clay in step (3) is 3 to 8, preferably 5 to 7, and more preferably 6.
Preferably, the final pellet size in step (3) is 3 to 12mm, preferably 5 to 10mm, and more preferably 6 to 8 mm.
The particle size of the final prilling particle in the granulation process is set in the preparation method of the sewage dephosphorization material, so that the contact area with sewage and wastewater in the specific use process is increased to the maximum, and the high efficiency of the dephosphorization effect is ensured. Meanwhile, the final spherical particles are made into a multi-layer structure, and the multi-layer structure is used for rubbing off the surface passivation part through the impact force of a water body on the sewage phosphorus removal material after the sewage phosphorus removal material generates the passivation part in the reaction process, so that the service life of the phosphorus removal material is remarkably prolonged, the service activity of the phosphorus removal material is increased to the maximum strength, the phosphorus removal efficiency is accelerated, and the treatment cost is reduced.
Preferably, the drying temperature in the step (4) is 75-180 ℃, and the drying time is 1-5 hours;
preferably, the drying temperature is 95-150 ℃, and the drying time is 1.5-4 hours;
further preferably, the drying temperature is 105-120 ℃, and the drying time is 2-3 hours.
Preferably, the sintering temperature in the step (4) is 280-700 ℃, and the sintering time is 1-5 hours;
preferably, the sintering temperature is 350-620 ℃, and the sintering time is 1.5-3 hours;
further preferably, the sintering temperature is 450-.
In the preparation method of the sewage dephosphorization material, the drying, the temperature and the use time selected during the drying are set, and the temperature for sintering after the drying and the time required for sintering are set, so that the maximum use efficiency is achieved by using the minimum energy consumption in the limited time, and the integrity and the effectiveness of the sewage dephosphorization material are ensured.
The application of the sewage dephosphorization material comprises the steps of treating sewage containing excessive phosphorus by adopting the sewage dephosphorization material;
preferably, a water body dephosphorization device is selected when sewage and wastewater containing excessive phosphorus is treated, the water body dephosphorization device comprises a water distribution area, a reaction area, a slag discharge area and a water discharge area, and the water distribution area is connected with the reaction area through a connecting pipe; the sewage dephosphorization material is arranged in the reaction zone; the slag discharging area is arranged at the lower part of the reaction area and is connected with the reaction area through a connecting pipe; the water discharge area is arranged at the outer side part of the water distribution area and is connected with the water distribution area through a connecting pipe; the device also comprises a power device which is arranged on a connecting pipe of the water distribution area and the reaction area; the slag discharging area is provided with a slag discharging port and a slag discharging valve, and the opening or the closing of the slag discharging port can be controlled by the slag discharging valve; the water discharging area is provided with a water discharging port and a water discharging valve, and the water discharging valve can control the opening or the closing of the water discharging port.
Preferably, a filler area is arranged in the reaction area, two ends of the filler area are respectively provided with a baffle, and each baffle is respectively provided with at least one mesh;
preferably, each mesh has a diameter of not less than 3 mm.
Preferably, one side of the reaction zone is provided with an opening, and the reaction zone is communicated with the water distribution zone through the opening.
The water body phosphorus removal device applied to the sewage phosphorus removal material has a simple structure, is convenient to manufacture, can perform circular reciprocating reaction according to the specific condition of phosphorus concentration in sewage, and can promote the impact force of sewage water flow speed and pressure on the phosphorus removal material by utilizing the change of the frequency of the power device, so that the surface passivation part of the phosphorus removal material is removed, the active regeneration of the phosphorus removal material is completed, the service cycle of the phosphorus removal material is effectively prolonged, and the cost of the sewage treatment process is reduced.
The invention has the beneficial effects that:
the sewage dephosphorization material provided by the invention is obtained by utilizing various raw materials with good dephosphorization effect and rich sources through a certain proportion. The sewage dephosphorization material not only can effectively remove the phosphorus in the sewage, but also is suitable for the upgrading and reconstruction process at the tail end of a sewage treatment plant. The sewage dephosphorization material can be used for treating the sewage with the overproof phosphorus in a wider concentration range.
According to the preparation method of the sewage dephosphorization material, after the spherulites I and II are respectively obtained, the multilayer dephosphorization material is obtained through multiple circulating granulation processes, the structure can promote the activity regeneration capability of the dephosphorization material when the dephosphorization material is contacted with sewage, the regeneration condition is simple, and the dephosphorization material does not need to be put in multiple times in the sewage treatment process. The preparation method has the advantages of simple process flow and lower manufacturing cost, the cyclic reaction of the materials obviously reduces the cost of sewage treatment, effectively reduces the loss of human resources, material resources and economic resources, and is suitable for industrial production and popularization.
The water body phosphorus removal device applied to the sewage phosphorus removal material has a simple structure, is convenient to manufacture, can perform circular reciprocating reaction according to the specific condition of phosphorus concentration in sewage, and can promote the impact force of sewage water flow speed and pressure on the phosphorus removal material by utilizing the change of the frequency of the power device, so that the surface passivation part of the phosphorus removal material is removed, the active regeneration of the phosphorus removal material is completed, the service cycle of the phosphorus removal material is effectively prolonged, and the cost of the sewage treatment process is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a water body phosphorus removal device of the sewage phosphorus removal material according to an embodiment of the invention.
In the figure: 1-water distribution area; 2-a reaction zone; 3-an overflow zone; 4-a packing region; 5-a baffle plate is arranged on the filling area; 6-a lower baffle of the packing area; 7-a slag discharge valve; 8-a slag discharge port; 9-a power plant; 10-a water outlet; 11-a drain valve; 12-water inlet of water distribution area; 13-overflow.
Detailed Description
The present invention is further illustrated below with reference to specific examples. It will be appreciated by those skilled in the art that the following examples, which are set forth to illustrate the present invention, are intended to be part of the present invention, but not to be construed as limiting the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The examples were carried out under the conventional conditions, unless otherwise specified. The reagents used are all conventional products which are commercially available.
Example 1:
(1) primary granulation: selecting 80 g of diatomite powder and 50 g of iron powder according to a corresponding proportion, mixing by a stirrer, uniformly stirring to obtain mixed powder, and adding 2-3 g of lanthanum chloride aqueous solution to obtain spherulites I;
(2) and (3) secondary granulation: uniformly mixing the spherulites I obtained in the step (1) with 80 g of activated clay selected according to a corresponding proportion to obtain mixed powder, and adding 2-3 g of lanthanum chloride aqueous solution to obtain spherulites II;
(3) alternate coating and granulation: uniformly mixing and granulating the spherulite II obtained in the step (2) and the mixed powder in the step (1), uniformly mixing and granulating the mixture and the activated clay in the step (2), repeatedly and alternately mixing and granulating the mixture and the mixed powder for 4 times, repeatedly and alternately mixing and granulating the mixture and the activated clay for 3 times, and obtaining a final spherulite with a multilayer structure and a particle size of 3 mm;
(4) preparing a finished product: and (4) drying the final pellets obtained in the step (3) at 75 ℃ for 1 hour, sintering at 280 ℃ for 1 hour, and cooling to room temperature to obtain a finished product with a multilayer structure.
Example 2: aqueous lanthanum nitrate solution
(1) Primary granulation: selecting 80 g of diatomite powder and 50 g of iron powder according to a corresponding proportion, mixing by a stirrer, uniformly stirring to obtain mixed powder, and adding 10-12 g of lanthanum nitrate aqueous solution to obtain spherulites I;
(2) and (3) secondary granulation: uniformly mixing the spherulite I obtained in the step (1) with 80 g of activated clay selected according to a corresponding proportion to obtain mixed powder, and adding 10-12 g of lanthanum nitrate aqueous solution to obtain a spherulite II;
(3) alternate coating and granulation: uniformly mixing and granulating the spherulite II obtained in the step (2) and the mixed powder in the step (1), uniformly mixing and granulating the mixture and the activated clay in the step (2), repeatedly and alternately mixing and granulating the mixture and the mixed powder for 10 times, repeatedly and alternately mixing and granulating the mixture and the activated clay for 8 times, and obtaining a final spherulite with a multilayer structure and a particle size of 12 mm;
(4) preparing a finished product: and (4) drying the final pellets obtained in the step (3) at 180 ℃ for 5 hours, sintering at 700 ℃ for 5 hours, and cooling to room temperature to obtain a finished product with a multilayer structure.
Example 3:
(1) primary granulation: selecting 200 g of diatomite powder and 150 g of iron powder according to a corresponding proportion, mixing the diatomite powder and the iron powder by a stirrer, uniformly stirring the mixture to obtain mixed powder, and adding 2 to 3 g of lanthanum chloride aqueous solution to obtain spherulites I;
(2) and (3) secondary granulation: uniformly mixing the spherulites I obtained in the step (1) with 200 g of activated clay selected according to a corresponding proportion to obtain mixed powder, and adding 2-3 g of lanthanum chloride aqueous solution to obtain spherulites II;
(3) alternate coating and granulation: uniformly mixing and granulating the spherulite II obtained in the step (2) and the mixed powder in the step (1), uniformly mixing and granulating the mixture and the activated clay in the step (2), repeatedly and alternately mixing and granulating the mixture and the mixed powder for 4 times, repeatedly and alternately mixing and granulating the mixture and the activated clay for 3 times, and obtaining a final spherulite with a multilayer structure and a particle size of 3 mm;
(4) preparing a finished product: and (4) drying the final pellets obtained in the step (3) at 75 ℃ for 1 hour, sintering at 280 ℃ for 1 hour, and cooling to room temperature to obtain a finished product with a multilayer structure.
Example 4:
(1) primary granulation: selecting 200 g of diatomite powder and 150 g of iron powder according to a corresponding proportion, mixing the diatomite powder and the iron powder by a stirrer, uniformly stirring the mixture to obtain mixed powder, and adding 10 to 12 g of lanthanum nitrate aqueous solution to obtain spherulites I;
(2) and (3) secondary granulation: uniformly mixing the spherulite I obtained in the step (1) with 200 g of activated clay selected according to a corresponding proportion to obtain mixed powder, and adding 10-12 g of lanthanum nitrate aqueous solution to obtain a spherulite II;
(3) alternate coating and granulation: uniformly mixing and granulating the spherulite II obtained in the step (2) and the mixed powder in the step (1), uniformly mixing and granulating the mixture and the activated clay in the step (2), repeatedly and alternately mixing and granulating the mixture and the mixed powder for 10 times, repeatedly and alternately mixing and granulating the mixture and the activated clay for 8 times, and obtaining a final spherulite with a multilayer structure and a particle size of 12 mm;
(4) preparing a finished product: and (4) drying the final pellets obtained in the step (3) at 180 ℃ for 5 hours, sintering at 700 ℃ for 5 hours, and cooling to room temperature to obtain a finished product with a multilayer structure.
Example 5:
(1) primary granulation: selecting 100 g of diatomite powder and 70 g of iron powder according to a corresponding proportion, mixing by a stirrer, uniformly stirring to obtain mixed powder, and adding 3-4 g of lanthanum chloride aqueous solution to obtain spherulites I;
(2) and (3) secondary granulation: uniformly mixing the spherulites I obtained in the step (1) with 100 g of activated clay selected according to a corresponding proportion to obtain mixed powder, and adding 3-4 g of lanthanum chloride aqueous solution to obtain spherulites II;
(3) alternate coating and granulation: uniformly mixing and granulating the spherulite II obtained in the step (2) and the mixed powder in the step (1), uniformly mixing and granulating the mixture and the activated clay in the step (2), repeatedly and alternately mixing and granulating the mixture and the mixed powder for 5 times, repeatedly and alternately mixing and granulating the mixture and the activated clay for 5 times, and obtaining a final spherulite with a multilayer structure and a particle size of 5 mm;
(4) preparing a finished product: and (4) drying the final pellets obtained in the step (3) at 95 ℃ for 1.5 hours, then sintering at 350 ℃ for 1.5 hours, and cooling to room temperature to obtain a finished product with a multilayer structure.
Example 6:
(1) primary granulation: selecting 100 g of diatomite powder and 70 g of iron powder according to a corresponding proportion, mixing by a stirrer, uniformly stirring to obtain mixed powder, and adding 3-4 g of lanthanum nitrate aqueous solution to obtain spherulites I;
(2) and (3) secondary granulation: uniformly mixing the spherulite I obtained in the step (1) with 200 g of activated clay selected according to a corresponding proportion to obtain mixed powder, and adding 3-4 g of lanthanum nitrate aqueous solution to obtain a spherulite II;
(3) alternate coating and granulation: uniformly mixing and granulating the spherulite II obtained in the step (2) and the mixed powder in the step (1), uniformly mixing and granulating the mixture and the activated clay in the step (2), repeatedly and alternately mixing and granulating the mixture and the mixed powder for 8 times, repeatedly and alternately mixing and granulating the mixture and the activated clay for 7 times, and obtaining final spherulites with a multilayer structure and a particle size of 10 mm;
(4) preparing a finished product: and (4) drying the final pellets obtained in the step (3) at 150 ℃ for 4 hours, sintering at 620 ℃ for 3 hours, and cooling to room temperature to obtain a finished product with a multilayer structure.
Example 7:
(1) primary granulation: selecting 180 g of diatomite powder and 110 g of iron powder according to a corresponding proportion, mixing by a stirrer, uniformly stirring to obtain mixed powder, and adding 7-8 g of lanthanum chloride aqueous solution to obtain spherulites I;
(2) and (3) secondary granulation: uniformly mixing the spherulites I obtained in the step (1) with 180 g of activated clay selected according to a corresponding proportion to obtain mixed powder, and adding 7-8 g of lanthanum chloride aqueous solution to obtain spherulites II;
(3) alternate coating and granulation: uniformly mixing and granulating the spherulite II obtained in the step (2) and the mixed powder in the step (1), uniformly mixing and granulating the mixture and the activated clay in the step (2), repeatedly and alternately mixing and granulating the mixture and the mixed powder for 8 times, repeatedly and alternately mixing and granulating the mixture and the activated clay for 7 times, and obtaining a final spherulite with a multilayer structure and a particle size of 5 mm;
(4) preparing a finished product: and (4) drying the final pellets obtained in the step (3) at 95 ℃ for 1.5 hours, then sintering at 350 ℃ for 1.5 hours, and cooling to room temperature to obtain a finished product with a multilayer structure.
Example 8:
(1) primary granulation: selecting 180 g of diatomite powder and 110 g of iron powder according to a corresponding proportion, mixing by a stirrer, uniformly stirring to obtain mixed powder, and adding 7-8 g of lanthanum nitrate aqueous solution to obtain spherulites I;
(2) and (3) secondary granulation: uniformly mixing the spherulite I obtained in the step (1) with 180 g of activated clay selected according to a corresponding proportion to obtain mixed powder, and adding 7-8 g of lanthanum nitrate aqueous solution to obtain a spherulite II;
(3) alternate coating and granulation: uniformly mixing and granulating the spherulite II obtained in the step (2) and the mixed powder in the step (1), uniformly mixing and granulating the mixture and the activated clay in the step (2), repeatedly and alternately mixing and granulating the mixture and the mixed powder for 8 times, repeatedly and alternately mixing and granulating the mixture and the activated clay for 7 times, and obtaining final spherulites with a multilayer structure and a particle size of 10 mm;
(4) preparing a finished product: and (4) drying the final pellets obtained in the step (3) at 150 ℃ for 4 hours, sintering at 620 ℃ for 3 hours, and cooling to room temperature to obtain a finished product with a multilayer structure.
Example 9:
(1) primary granulation: selecting 150 g of diatomite powder and 100 g of iron powder according to a corresponding proportion, mixing the diatomite powder and the iron powder by a stirrer, uniformly stirring the mixture to obtain mixed powder, and adding 4 to 5 g of lanthanum chloride aqueous solution to obtain spherulites I;
(2) and (3) secondary granulation: uniformly mixing the spherulites I obtained in the step (1) with 150 g of activated clay selected according to a corresponding proportion to obtain mixed powder, and adding 4-5 g of lanthanum chloride aqueous solution to obtain spherulites II;
(3) alternate coating and granulation: uniformly mixing and granulating the spherulite II obtained in the step (2) and the mixed powder in the step (1), uniformly mixing and granulating the mixture and the activated clay in the step (2), repeatedly and alternately mixing and granulating the mixture and the mixed powder for 7 times, repeatedly and alternately mixing and granulating the mixture and the activated clay for 6 times, and obtaining a final spherulite with a multilayer structure and a particle size of 6 mm;
(4) preparing a finished product: and (4) drying the final spherical pellets obtained in the step (3) at 105 ℃ for 2 hours, sintering at 450 ℃ for 2 hours, and cooling to room temperature to obtain the finished product with the multilayer structure.
Example 10:
(1) primary granulation: selecting 150 g of diatomite powder and 100 g of iron powder according to a corresponding proportion, mixing the diatomite powder and the iron powder by a stirrer, uniformly stirring the mixture to obtain mixed powder, and adding 4 to 5 g of lanthanum nitrate aqueous solution to obtain spherulites I;
(2) and (3) secondary granulation: uniformly mixing the spherulite I obtained in the step (1) with 150 g of activated clay selected according to a corresponding proportion to obtain mixed powder, and adding 4-5 g of lanthanum nitrate aqueous solution to obtain a spherulite II;
(3) alternate coating and granulation: uniformly mixing and granulating the spherulite II obtained in the step (2) and the mixed powder in the step (1), uniformly mixing and granulating the mixture and the activated clay in the step (2), repeatedly and alternately mixing and granulating the mixture and the mixed powder for 6 times, repeatedly and alternately mixing and granulating the mixture and the activated clay for 6 times, and obtaining a final spherulite with a multilayer structure and a particle size of 8 mm;
(4) preparing a finished product: and (4) drying the final spherical pellets obtained in the step (3) at 120 ℃ for 3 hours, sintering at 510 ℃ for 2.5 hours, and cooling to room temperature to obtain the finished product with the multilayer structure.
When sewage and wastewater containing excessive phosphorus is treated by the arranged sewage and phosphorus removal material, a water body phosphorus removal device is selected, the device comprises a water distribution area 1, a reaction area 2, a slag discharge area and a water discharge area, and the water distribution area 1 is connected with the reaction area 2 through a connecting pipe; the sewage dephosphorization material is arranged in the reaction zone 2; the slag discharging area is arranged at the lower part of the reaction area 2 and is connected with the reaction area 2 through a connecting pipe; the water drainage area is arranged at the outer side part of the water distribution area 1 and is connected with the water distribution area 1 through a connecting pipe; the device also comprises a power device 9, wherein the power device 9 is arranged on a connecting pipe of the water distribution area 1 and the reaction area 2; the slag discharging area is provided with a slag discharging port 8 and a slag discharging valve 7, and the slag discharging valve 7 can control the opening or closing of the slag discharging port 8; the drain area is provided with a drain opening 10 and a drain valve 11, and the drain valve 11 can control the opening or closing of the drain opening 10.
The reaction zone 2 is provided with a filler zone 4, two ends of the filler zone 4 are provided with a filler zone upper baffle 5 and a filler zone lower baffle 6, each baffle is provided with a plurality of meshes with the diameter not less than 3mm, and the provided sewage dephosphorization material is arranged in the filler zone 4. One side of the reaction area 2 is provided with an opening which is an overflow port 13, and the reaction area 2 is communicated with the water distribution area 1 through the overflow port 13.
When sewage and wastewater containing excessive phosphorus enters the device through a water distribution area water inlet 12 of a water distribution area 1, a power device 9 is started, the sewage and wastewater to be treated in the water distribution area 1 enters a reaction area 2 through a connecting pipe, the power device 9 moves the sewage and wastewater to be treated in the reaction area 2 towards a filler area 4 and fully contacts with the provided sewage and phosphorus removal material of the filler area 4 to generate reaction, and then the sewage and wastewater subjected to primary treatment flows back to the water distribution area 1 through an overflow port 13 of an overflow area 3. Detecting whether the treated water in the water distribution area 1 meets the discharge standard, and if the treated water meets the discharge standard, discharging the treated water out of the device through a water discharge port 10 by opening a water discharge valve 11; if the wastewater does not reach the discharge standard, the wastewater after the preliminary treatment can enter the reaction area 2 again through the connecting pipe for reaction, and can be circularly treated for many times until the treated water reaches the discharge standard.
Meanwhile, when the phosphorus removal material is in an action reaction, the phosphorus removal material is continuously used to enable the material to generate a passivation phenomenon, the water flow speed and pressure of the water distribution area 1 entering the reaction area 2 can be increased by increasing the frequency of the power device 9, the phosphorus removal material generates friction mutually under the action of impact force of sewage and wastewater, and then the passivation part is rubbed off, so that the active regeneration of the phosphorus removal material is realized. The abraded waste material of the phosphorus removal material generated after friction is discharged out of the device through a slag discharge port 8 by opening a slag discharge valve 7.
The power device selected in the specific implementation process of the device is the circulation increasing pump, the selection of the power device is not limited to the selection provided by the above, and all mechanical structures capable of realizing the pressurization and circulation functions belong to the protection scope of the invention.
Examples of the experiments
Subject: selecting daily chemical wastewater as an experimental object.
The experimental method comprises the following steps: 500mL of chemical wastewater in the experimental object is extracted, and the chemical wastewater is divided into 5 parts on average, each part is 100mL, and the number is 1-5 for detection. The experimental subjects were treated with the product prepared in example 10 provided above.
The experimental detection indexes are as follows: the assay was performed 8 hours, 15 hours, 20 hours, 25 hours, and 30 hours after the subjects were treated using example 10.
The results are shown in the following table:
TABLE 1 phosphorus removal Effect test results
The data above show that the subjects treated the product prepared in example 10 provided above, and the overall treatment effect exhibited an increasing trend over the treatment time.
The sewage dephosphorization material provided by the invention is obtained by utilizing various raw materials with good dephosphorization effect and rich sources through a certain proportion. The sewage dephosphorization material not only can effectively remove the phosphorus in the sewage, but also is suitable for the upgrading and reconstruction process at the tail end of a sewage treatment plant. The sewage dephosphorization material can be used for treating the sewage with the overproof phosphorus in a wider concentration range.
According to the preparation method of the sewage dephosphorization material, after the spherulites I and II are respectively obtained, the multilayer dephosphorization material is obtained through multiple circulating granulation processes, the structure can promote the activity regeneration capability of the dephosphorization material when the dephosphorization material is contacted with sewage, the regeneration condition is simple, and the dephosphorization material does not need to be put in multiple times in the sewage treatment process. The preparation method has the advantages of simple process flow and lower manufacturing cost, the cyclic reaction of the materials obviously reduces the cost of sewage treatment, effectively reduces the loss of human resources, material resources and economic resources, and is suitable for industrial production and popularization.
The water body phosphorus removal device applied to the sewage phosphorus removal material has a simple structure, is convenient to manufacture, can perform circular reciprocating reaction according to the specific condition of phosphorus concentration in sewage, and can promote the impact force of sewage water flow speed and pressure on the phosphorus removal material by utilizing the change of the frequency of the power device, so that the surface passivation part of the phosphorus removal material is removed, the active regeneration of the phosphorus removal material is completed, the service cycle of the phosphorus removal material is effectively prolonged, and the cost of the sewage treatment process is reduced.
While particular embodiments of the present invention have been illustrated and described, it will be appreciated that the present invention is not limited to the above-described alternative embodiments, and that various other forms of product may be devised by anyone in light of the present invention. The foregoing detailed description should not be construed as limiting the scope of the invention, and those skilled in the art will understand that various modifications can be made to the technical solutions described in the foregoing embodiments, or some or all of the technical features can be equivalently replaced, without departing from the spirit and scope of the invention, and at the same time, such modifications or replacements do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the invention; the scope of the invention should be determined with reference to the appended claims, and the description should be construed to interpret the claims.
Claims (25)
1. The sewage dephosphorization material is characterized by being prepared from the following raw materials in parts by mass:
80-200 parts of diatomite powder, 50-150 parts of iron powder, 80-200 parts of activated clay and 2-10 parts of wetting agent;
the preparation method of the phosphorus removal material comprises the following steps:
(1) primary granulation: selecting diatomite powder and iron powder according to a corresponding proportion, uniformly mixing to obtain mixed powder, adding a wetting agent for granulation to obtain spherulites I;
(2) and (3) secondary granulation: uniformly mixing the spherulites I obtained in the step (1) with activated clay selected according to a corresponding proportion to obtain mixed powder, and adding a wetting agent for granulation to obtain spherulites II;
(3) alternate coating and granulation: uniformly mixing the spherulites II obtained in the step (2) with the mixed powder in the step (1) for granulation, then uniformly mixing the mixture with the activated clay in the step (2) for granulation, and then repeating the steps for alternate coating granulation to obtain final spherulites with a multilayer structure;
(4) preparing a finished product: and (4) drying and sintering the final pellets obtained in the step (3), and cooling to room temperature to obtain a finished product.
2. The sewage phosphorus removal material of claim 1, wherein the phosphorus removal material is prepared from the following raw materials in parts by mass:
100-180 parts of diatomite powder, 70-110 parts of iron powder, 100-180 parts of activated clay and 3-8 parts of wetting agent.
3. The sewage phosphorus removal material of claim 2, wherein the phosphorus removal material is mainly prepared from the following raw materials in parts by mass:
150 parts of diatomite powder, 100 parts of iron powder, 150 parts of activated clay and 5 parts of wetting agent.
4. The sewage phosphorus removal material of claim 1, wherein the wetting agent in step (1) and step (2) comprises a soluble lanthanum salt aqueous solution.
5. The sewage phosphorus removal material of claim 4, wherein the soluble lanthanum salt aqueous solution comprises a lanthanum chloride aqueous solution and/or a lanthanum nitrate aqueous solution.
6. The sewage phosphorus removal material of claim 1, wherein the number of coating times for alternate coating and granulation with the mixed powder in step (3) is 4-10.
7. The sewage phosphorus removal material of claim 6, wherein the number of coating times for alternate coating and granulation with the mixed powder in step (3) is 5-8.
8. The sewage phosphorus removal material of claim 7, wherein the number of coating times for alternate coating and granulation with the mixed powder in step (3) is 6-7.
9. The sewage phosphorus removal material of claim 1, wherein the number of coating times for alternate coating and granulation with activated clay in step (3) is 3-8.
10. The sewage phosphorus removal material of claim 9, wherein the number of coating times for alternate coating and granulation with activated clay in step (3) is 5-7.
11. The phosphorus removal material from sewage as claimed in claim 10, wherein the number of coating times of alternate coating and granulation with activated clay in step (3) is 6.
12. The sewage phosphorus removal material of claim 1, wherein the final pellet size in step (3) is 3-12 mm.
13. The sewage phosphorus removal material of claim 12, wherein the final pellet size in step (3) is 5-10 mm.
14. The sewage phosphorus removal material of claim 13, wherein the final pellet size in step (3) is 6-8 mm.
15. The sewage phosphorus removal material of claim 1, wherein the drying temperature in step (4) is 75-180 ℃ and the drying time is 1-5 hours.
16. The phosphorus removal material from sewage as claimed in claim 15, wherein the drying temperature in step (4) is 95-150 ℃ and the drying time is 1.5-4 hours.
17. The phosphorus removal material as claimed in claim 16, wherein the drying temperature in step (4) is 105-120 ℃ and the drying time is 2-3 hours.
18. The sewage phosphorus removal material of claim 1, wherein the sintering temperature in step (4) is 280-700 ℃, and the sintering time is 1-5 hours.
19. The phosphorus removal material as claimed in claim 18, wherein in the step (4), the sintering temperature is 350-620 ℃ and the sintering time is 1.5-3 hours.
20. The phosphorus removal material as claimed in claim 19, wherein the sintering temperature in step (4) is 450-510 ℃ and the sintering time is 2-2.5 hours.
21. The use of the sewage phosphorus removal material of any one of claims 1 to 3, comprising treating sewage waste water containing excessive phosphorus with the sewage phosphorus removal material.
22. The application of the sewage phosphorus removal material of claim 21, wherein a water phosphorus removal device is selected for treating sewage containing excessive phosphorus, the water phosphorus removal device comprises a water distribution area, a reaction area, a slag discharge area and a water discharge area, and the water distribution area is connected with the reaction area through a connecting pipe; the sewage dephosphorization material is arranged in the reaction zone; the slag discharging area is arranged at the lower part of the reaction area and is connected with the reaction area through a connecting pipe; the water drainage area is arranged at the outer side part of the water distribution area and is connected with the water distribution area through a connecting pipe; the device also comprises a power device which is arranged on a connecting pipe of the water distribution area and the reaction area; the slag discharging area is provided with a slag discharging port and a slag discharging valve, and the opening or closing of the slag discharging port can be controlled by the slag discharging valve; the drainage area is provided with a drainage port and a drainage valve, and the drainage valve can control the opening or closing of the drainage port.
23. The use of a phosphorus removal material from wastewater as claimed in claim 22, wherein the reaction zone is provided with a packing zone, the two ends of the packing zone are respectively provided with a baffle, and each baffle is provided with at least one mesh.
24. The use of a phosphorus removal material from wastewater as claimed in claim 23, wherein each mesh has a diameter of not less than 3 mm.
25. The use of a phosphorus removal material from wastewater as claimed in claim 22, wherein an opening is provided at one side of the reaction zone, and the reaction zone is connected to the water distribution zone through the opening.
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