A quick-acting water purifier and its preparation method and water purification method

Abstract

The invention relates to a quick-acting water purifier and a preparation method and a water purification method thereof. The quick-acting water purifier is composed of inorganic ore composition powder, polyacrylamide, modified straw powder and lanthanum-containing rare earth powder. The inorganic ore composition powder is composed of rectorite, zeolite and volcanic stone. The effective ingredients of the quick-acting water purifier are obtained by grinding rectorite, zeolite and volcanic stone after high-temperature calcination to form the inorganic ore composition powder and by using 30% sodium hydroxide and high-temperature modified straw. The quick-acting water purifier is matched with lanthanum-containing rare earth powder and polyacrylamide as well as in-situ and ex-situ purification methods to achieve excellent sewage purification effect. The invention has a simple implementation method, low cost, remarkable purification effect and realizes resource optimization.

Description

Technical Field

[0001] The invention belongs to the technical field of water environment treatment agents, and specifically relates to a quick-acting water purifier and a preparation method and a water purification method thereof. Background Art

[0002] At present, the treatment of black and odorous water bodies in most cities has achieved ideal results, but occasional pollution problems still occur on rainy days. The main factor causing urban water pollution is the discharge of overflow sewage from rainwater pipes on rainy days, which causes the water to turn black and smelly. The main technologies for treating water bodies currently include artificial floating beds, underwater forests, artificial wetlands, chemical treatment, water exchange, dilution and other methods. Among these methods, the chemical purification method is the most effective and has become the preferred method for many cities to treat sudden water pollution.

[0003] There are many types of purifying agents for black and odorous water bodies, mainly biological flocculants, organic flocculants, inorganic flocculants and composite flocculants. Among them, biological flocculants are not suitable for the rapid purification of black and odorous water bodies due to their long purification reaction time; inorganic flocculants are limited because of their generally large dosage and high operating costs; organic flocculants are restricted in the treatment of black and odorous water bodies due to their slow precipitation; existing composite flocculants generally have the disadvantages of complex preparation, high cost, and unstable effect. Summary of the invention

[0004] In view of the above-mentioned prior art, the present invention proposes a quick-acting water purifier and a preparation method thereof and a water purification method, which solves the technical problems of the prior art such as complex preparation of purification agents, high cost, unstable effect, poor purification level, etc., and achieves technical effects such as simple operation, low cost, significant purification effect and resource optimization.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A quick-acting water purifier is composed of inorganic mineral composition powder, polyacrylamide, modified straw powder, and lanthanum-containing rare earth powder, wherein the weight proportion of each component is: 20-45 parts of inorganic mineral composition powder, 40-50 parts of polyacrylamide, 10-15 parts of modified straw powder, and 5-10 parts of lanthanum-containing rare earth powder; the inorganic mineral composition powder is composed of rectorite, zeolite and volcanic rock, wherein the weight ratio of each component is 2:5:3.

[0007] Furthermore, the modified straw powder is modified straw powder prepared from one or more of corn straw, wheat straw, rice straw, rapeseed and reed straw.

[0008] Furthermore, the composition of the lanthanum-containing rare earth powder is La 2 O 324.0-35.0%, CeO 2 33.0-50.0%, Nd 2 O 3 9.0-12.0%, Pr 6 O 11 3.0-7.0%, impurities, the sum of the various components of the lanthanum-containing rare earth powder is 100%.

[0009] Furthermore, the size of the modified straw powder is 300-350 meshes.

[0010] Furthermore, the size of the inorganic mineral composition powder is 300-350 mesh.

[0011] Furthermore, the density of the quick-acting water purifier is 1.2-1.3 g / cm 3 .

[0012] Furthermore, the present invention also adopts the following technical scheme to prepare the above-mentioned quick-acting water purifier:

[0013] The steps include:

[0014] 1) calcining rectorite, zeolite and volcanic rock at a high temperature of 800-1000° C. and then grinding them into a porous inorganic mineral composition powder of 300-350 meshes;

[0015] 2) Soak the straw in a 30% sodium hydroxide solution for 150 minutes to modify it, place it in a furnace isolated from air after drying, heat it to 950-1050°C, and complete the drying, pyrolysis, melting, bonding, curing, and shrinking stages at high temperature; grind it into 300-350 mesh modified straw powder after drying;

[0016] 3) Weighing polyacrylamide and lanthanum-containing rare earth powder according to the weight proportion of each component in the quick-acting water purifier;

[0017] 4) The inorganic mineral composition powder, polyacrylamide, modified straw powder and lanthanum-containing rare earth powder are uniformly mixed at room temperature to prepare a quick-acting water purifier.

[0018] Furthermore, the present invention also adopts the following technical scheme to perform in-situ water purification:

[0019] S1) Use a container to hold a certain weight of quick-acting water purifier; and fix the container to the stern of the ship;

[0020] S2) The bottom of the container is connected to a screw pump for injecting the quick-acting water purifier, and the outlet pipe of the screw pump is fixed above the propeller of the ship, so that the quick-acting water purifier pumped out can enter the water body and be stirred by the propeller to ensure that it is fully mixed with the water body;

[0021] S3) Add quick-acting water purifier according to the degree of water pollution and water depth;

[0022] S4) The ship runs back and forth in the water body to ensure that the polluted water body is evenly doped with the accelerated water purifier to achieve the original purification of the water body.

[0023] Furthermore, in step S3, the quick-acting water purifier is added at a rate of 10-2000 g per square meter of water surface, and the propeller speed of the ship is ensured to be no less than 600-800 rpm.

[0024] Furthermore, the present invention also adopts the following technical scheme to perform ex situ water purification:

[0025] S10) Install sewage pumps at appropriate locations in the water body and build flocculation treatment devices at appropriate locations on the shore;

[0026] S20) according to the degree of water pollution, 5-200g of quick-acting water purifier is added to the flocculation treatment device at a ratio of 1000kg of sewage, and the mixture is rapidly stirred at a speed of 80-120rpm per second for 0.5-2 minutes;

[0027] S30) after rapid stirring, stirring at a speed of 20-40 rpm per second for 20-40 seconds;

[0028] S40) stop stirring, let stand for 5-10 minutes and then discharge the supernatant.

[0029] Furthermore, the flocculation treatment device includes a purification chamber capable of accommodating sewage, and a stirrer is provided in the purification chamber; those skilled in the art know that the flocculation treatment device is a conventional sewage treatment device in the art and is not limited to the above structure, as long as flocculation treatment can be achieved.

[0030] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0031] 1. The modified straw powder prepared by using one or more of corn straw, wheat straw, rice straw, rape and reed straw has low cost, not only realizing the optimal utilization of agricultural waste resources, but also undergoing the alkali and high temperature treatment process of the present invention to make it into modified straw powder, forming a biochar structure with a porous structure, which has the function of adsorbing organic pollutants, and can coordinate with the rare earth elements in the lanthanum rare earth powder, increase the redox capacity of the rare earth elements, and finally significantly improve the purification performance of the water purifier;

[0032] 2. Lanthanum-containing rare earth powder contains a large amount of lanthanide substances and other rare earth elements, and has a strong ability to gain or lose electrons. In the process of gaining or losing electrons, it can oxidize or reduce pollutants, thereby purifying pollutants;

[0033] 3. Polyacrylamide can dissolve into a network structure after entering the water body, and the inorganic mineral composition powder, modified straw powder, and lanthanum-containing rare earth powder attached to it increase its density, which can increase its sinking speed and achieve the purpose of rapid purification;

[0034] 4. The present invention reasonably prepares the composition and proportion of inorganic mineral composition powder, modified straw powder, lanthanum-containing rare earth powder, etc., so that these components can act synergistically and the density is maintained within a reasonable range. The polyacrylamide with a network structure continuously gathers particulate pollutants in the polluted water body through the net-catching effect during the rapid sinking process. At the same time, the inorganic mineral composition powder attached thereto continuously absorbs pollutants such as nitrogen and phosphorus in the water. The modified straw powder continuously absorbs organic pollutants to reduce pollution indicators such as COD and BOD of the polluted water body. The lanthanum-containing rare earth powder undergoes oxidation and reduction reactions to purify the polluted water body. The various components of the present invention complement each other to achieve excellent water purification effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a comparison diagram of raw water and effluent corresponding to the specific embodiment 1 of the present invention. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0037] Embodiment 1:

[0038] This embodiment provides a quick-acting water purifier, which is composed of an inorganic mineral composition powder, polyacrylamide, modified straw powder, and lanthanum-containing rare earth powder, wherein the weight proportion of each component is: 35 parts of inorganic mineral composition powder, 45 parts of polyacrylamide, 12 parts of modified straw powder, and 8 parts of lanthanum-containing rare earth powder; the inorganic mineral composition powder is composed of rectorite, zeolite and volcanic stone, wherein the weight ratio of each component is 2:5:3;

[0039] The inorganic mineral composition powder is prepared by the following method: rectorite, zeolite and volcanic stone are calcined at a high temperature of 900° C. and then ground into a 350-mesh porous inorganic mineral composition powder;

[0040] The rectorite, zeolite and volcanic stone described in this embodiment were purchased from Lingshou County Huiheng Mineral Products Processing Factory in 1688;

[0041] The modified straw powder is prepared by the following method: the corn straw is modified by soaking it in a 30% by mass sodium hydroxide solution for 150 minutes, and after drying, it is placed in a furnace isolated from air, heated to 1000° C., and the drying, pyrolysis, melting, bonding, curing, and shrinking stages are completed at high temperature; after drying, it is ground into a 350-mesh modified straw powder;

[0042] In this embodiment, the composition of the lanthanum-containing rare earth powder is La 2 O 3 34.3%, CeO 2 43.5%,Nd 2 O 3 10.8%, Pr 6 O 11 5.6%, impurities.

[0043] The density of the quick-acting water purifier corresponding to this embodiment is 1.27 g / cm 3 .

[0044] This embodiment adopts an ex situ water purification method to carry out a purification test, which specifically includes the following steps:

[0045] S10) Install a sewage pump at an appropriate location in the water body of the oil production wastewater, and build a flocculation treatment device at an appropriate location on the shore;

[0046] S20) according to the degree of water pollution, a quick-acting water purifier is added to the flocculation treatment device at a ratio of 100 g of quick-acting water purifier per 1000 kg of sewage, and the mixture is rapidly stirred at a speed of 100 rpm per second for 1.5 minutes;

[0047] S30) after rapid stirring, stirring at a speed of 30 rpm per second for 30 seconds;

[0048] S40) stop stirring, and drain the supernatant after standing for 10 minutes.

[0049] The raw water COD (Chemical Oxygen Demand) of the oil production wastewater in this embodiment is 2300ppm, and the effluent COD after the above treatment is 730ppm. The petroleum substances in the raw water are 104ppm, and the petroleum substances in the effluent are 20.1ppm. The suspended solids in the raw water are 376ppm, and the suspended solids in the effluent are 15ppm. The specific comparison between the raw water and the effluent is as follows: Figure 1 shown.

[0050] Comparative Example 1:

[0051] The difference from Example 1 is that the quick-acting water purifier is composed of polyacrylamide and inorganic mineral composition powder but does not contain modified straw powder and lanthanum-containing rare earth powder, wherein the polyacrylamide is 45 parts and the inorganic mineral composition powder is 55 parts, and the inorganic mineral composition powder is composed of rectorite, zeolite and volcanic rock, wherein the weight ratio of each component is 2:5:3.

[0052] In this comparative example 1, the raw water COD of the oil production wastewater is 2300ppm, and the effluent COD after the above treatment is 1900ppm. The petroleum substances in the raw water are 104ppm, and the petroleum substances in the effluent are 45ppm. The suspended solids in the raw water are 376ppm, and the suspended solids in the effluent are 83ppm.

[0053] Comparative Example 2:

[0054] The difference from Example 1 is that the quick-acting water purifier is composed of polyacrylamide and modified straw powder but does not contain inorganic mineral composition powder and lanthanum-containing rare earth powder, wherein the polyacrylamide is 45 parts and the modified straw powder is 55 parts.

[0055] In this comparative example 2, the raw water COD of the oil production wastewater is 2300ppm, and the effluent COD after the above treatment is 830ppm. The petroleum substances in the raw water are 104ppm, and the petroleum substances in the effluent are 71ppm. The suspended solids in the raw water are 376ppm, and the suspended solids in the effluent are 220ppm.

[0056] Comparative Example 3:

[0057] The difference from Example 1 is that the quick-acting water purifier is composed of polyacrylamide and lanthanum-containing rare earth powder but does not contain inorganic mineral composition powder and modified straw powder, wherein the polyacrylamide is 45 parts and the lanthanum-containing rare earth powder is 55 parts.

[0058] In this comparative example 2, the raw water COD of the oil production wastewater is 2300ppm, and the effluent COD after the above treatment is 780ppm. The petroleum substances in the raw water are 104ppm, and the petroleum substances in the effluent are 55ppm. The suspended solids in the raw water are 376ppm, and the suspended solids in the effluent are 220ppm.

[0059] Comparative Example 4:

[0060] The difference from Comparative Example 1 is that the powder of the inorganic mineral composition is all rectorite.

[0061] The raw water COD of the oil production wastewater in this comparative example 4 is 2300ppm, and the effluent COD after the above treatment is 1990ppm, the raw water petroleum substances are 104ppm, the effluent petroleum substances are 55ppm, the raw water suspended solids are 376ppm, and the effluent suspended solids are 102ppm.

[0062] Comparative Example 5:

[0063] The difference from Comparative Example 1 is that the inorganic mineral composition powder is all zeolite.

[0064] The raw water COD of the oil production wastewater in this comparative example 5 is 2300ppm, and the effluent COD after the above treatment is 2011ppm, the raw water petroleum substances are 104ppm, the effluent petroleum substances are 48ppm, the raw water suspended solids are 376ppm, and the effluent suspended solids are 92ppm.

[0065] Comparative Example 6:

[0066] The difference from Comparative Example 1 is that the inorganic mineral composition powder is all volcanic rock.

[0067] The raw water COD of the oil production wastewater in this comparative example 6 is 2300ppm, and the effluent COD after the above treatment is 1920ppm. The petroleum substances in the raw water are 104ppm, and the petroleum substances in the effluent are 60ppm. The suspended solids in the raw water are 376ppm, and the suspended solids in the effluent are 95ppm.

[0068] It can be seen from the above embodiments and comparative examples that the inorganic mineral composition powder, polyacrylamide, modified straw powder, and lanthanum-containing rare earth powder have a certain positive synergistic effect with each other when forming the quick-acting water purifier of the present invention, which can improve the purification effect of wastewater. The rectorite, zeolite and volcanic stone in the inorganic mineral composition powder also have a certain positive synergistic effect, which can also improve the purification effect of wastewater.

[0069] Therefore, based on the description of the above embodiments, it can be concluded that, compared with the prior art, the present invention has the following beneficial effects:

[0070] 1. The modified straw powder prepared by using one or more of corn straw, wheat straw, rice straw, rape and reed straw has low cost, not only realizing the optimal utilization of agricultural waste resources, but also undergoing the alkali and high temperature treatment process of the present invention to make it into modified straw powder, forming a biochar structure with a porous structure, which has the function of adsorbing organic pollutants, and can coordinate with the rare earth elements in the lanthanum rare earth powder, increase the redox capacity of the rare earth elements, and finally significantly improve the purification performance of the water purifier;

[0071] 2. Lanthanum-containing rare earth powder contains a large amount of lanthanide substances and other rare earth elements, and has a strong ability to gain or lose electrons. In the process of gaining or losing electrons, it can oxidize or reduce pollutants, thereby purifying pollutants;

[0072] 3. Polyacrylamide can dissolve into a network structure after entering the water body, and the inorganic mineral composition powder, modified straw powder, and lanthanum-containing rare earth powder attached to it increase its density, which can increase its sinking speed and achieve the purpose of rapid purification;

[0073] 4. The present invention reasonably prepares the composition and proportion of inorganic mineral composition powder, modified straw powder, lanthanum-containing rare earth powder, etc., so that these components can act synergistically and the density is maintained within a reasonable range. The polyacrylamide with a network structure continuously gathers particulate pollutants in the polluted water body through the net-catching effect during the rapid sinking process. At the same time, the inorganic mineral composition powder attached thereto continuously absorbs pollutants such as nitrogen and phosphorus in the water. The modified straw powder continuously absorbs organic pollutants to reduce pollution indicators such as COD and BOD of the polluted water body. The lanthanum-containing rare earth powder undergoes oxidation and reduction reactions to purify the polluted water body. The various components of the present invention complement each other to achieve excellent water purification effects.

[0074] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A quick-acting water purifier, characterized in that: The invention is composed of inorganic ore composition powder, polyacrylamide, modified straw powder and lanthanum-containing rare earth powder, wherein the weight proportion of each component is: 20-45 parts of inorganic ore composition powder, 40-50 parts of polyacrylamide, 10-15 parts of modified straw powder and 5-10 parts of lanthanum-containing rare earth powder; the inorganic ore composition powder is composed of rectorite, zeolite and volcanic stone, wherein the weight ratio of each component is 2:5:3; the quick-acting water purifier is prepared by the following steps: rectorite, zeolite and volcanic stone are calcined at a high temperature of 800-1000°C and then ground into 300-350 mesh; A porous inorganic mineral composition powder; modifying straw by soaking it in a 30% sodium hydroxide solution for 150 minutes, placing it in a furnace isolated from air after drying, heating it to 950-1050°C, and completing the drying, pyrolysis, melting, bonding, curing, and shrinking stages at high temperature; grinding it into a modified straw powder of 300-350 mesh after drying; weighing polyacrylamide and lanthanum-containing rare earth powder according to the weight proportion of each component in the quick-acting water purifier; mixing the inorganic mineral composition powder, polyacrylamide, modified straw powder, and lanthanum-containing rare earth powder evenly at room temperature to compound into a quick-acting water purifier.

2. The quick-acting water purifier according to claim 1, characterized in that: The modified straw powder is modified straw powder prepared from one or more of corn straw, wheat straw, rice straw, rapeseed and reed straw.

3. The quick-acting water purifier according to claim 1, characterized in that: The lanthanum-containing rare earth powder is composed of La2O3 24.0-35.0%, CeO2 33.0-50.0%, Nd2O3 9.0-12.0%, Pr6O 11 3.0-7.0%, and the rest are impurities. The sum of the components of the lanthanum-containing rare earth powder is 100%.

4. The quick-acting water purifier according to claim 1, characterized in that: The size of the modified straw powder is 300-350 meshes.

5. The quick-acting water purifier according to claim 1, characterized in that: The size of the inorganic mineral composition powder is 300-350 mesh.

6. The quick-acting water purifier according to claim 1, characterized in that: The density of the quick-acting water purifier is 1.2-1.3 g / cm 3 .

7. An in-situ water purification method, which uses the quick-acting water purifier according to any one of claims 1 to 6, characterized in that: The steps include: S1) Use a container to hold a certain weight of quick-acting water purifier and fix the container at the stern of the ship; S2) The bottom of the container is connected to a screw pump for injecting the quick-acting water purifier, and the outlet pipe of the screw pump is fixed above the propeller of the ship so that the quick-acting water purifier pumped out can enter the water body and be stirred by the propeller to ensure that it is fully mixed with the water body; S3) Add quick-acting water purifier according to the degree of water pollution and water depth; S4) The ship moves back and forth in the water body to ensure that the accelerated water purifier is evenly applied to the polluted water body, thus achieving in-situ purification of the water body.

8. The in-situ water purification method according to claim 7, characterized in that: In step S3, the quick-acting water purifier is added at a rate of 10-2000 g per square meter of water surface, and the propeller speed of the ship is ensured to be no less than 600-800 rpm.

9. An ex situ water purification method, using the quick-acting water purifier according to any one of claims 1 to 6, characterized in that: The steps include: S10) Install sewage pumps at appropriate locations in the water body and build flocculation treatment devices at appropriate locations on the shore; S20) according to the degree of water pollution, add 5-200g of quick-acting water purifier to the flocculation treatment device at a ratio of 1000kg of sewage and stir rapidly at a speed of 80-120rpm per second for 0.5-2 minutes; S30) After rapid stirring, stirring at a speed of 20-40 rpm per second for 20-40 seconds; S40) Stop stirring, let stand for 5-10 minutes and then drain the supernatant.

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