Mine water treatment powder composite water purifying agent and preparation method thereof

Abstract

The invention discloses a mine water treatment powder composite water purifying agent and a preparation method thereof, and belongs to the technical field of mine water treatment. The coating is composed of a component A and a component B, wherein the component A is prepared from polyaluminum chloride, cationic polyacrylamide, bentonite, aluminum potassium sulfate and the like; and the component B comprises sodium carbonate, powdered activated carbon, precipitated barium sulfate, black zinc oxide powder, sodium sulfite, a defoaming agent and the like. During feeding, the flocculating agent is directly put into mine wastewater to be treated in a powder form, so that the mine water containing soluble gas and anion colloid particles can be quickly subjected to flocculating settling treatment, and the dissolving operation process of various medicaments and the use of dissolving equipment are reduced. And when the mine water is treated, the process is simple, the floc density is large, the settling velocity is high, and the phenomena of difficult sludge separation and complex separation measures caused by floc floating can be prevented. The treated water quality is clear, the light transmittance is high, COD (Chemical Oxygen Demand) and the like in mine water can be effectively reduced, and the mine water treatment agent is excellent in comprehensive performance.

Description

Technical Field

[0001] The invention belongs to the technical field of mine water treatment, and in particular relates to a mine water treatment powder composite water purifier with high gas content and high negative ion colloid content and a preparation method thereof. Background Art

[0002] In the process of underground coal mining, a large amount of groundwater will inevitably gush out. This water is mixed with waste liquid in the process of coal mining. Mine water is a by-product of the mining process of mineral resources and an important unconventional water. Mine water must be purified before it can be discharged and used. The sources of mine water are mainly the following: with the large-scale mining of coal, the underground goaf area gradually increases, the surrounding rock stress field changes, the roof begins to sink after the coal seam is mined, cracks and collapses appear on the surface, and atmospheric precipitation directly pours into the tunnel through these cracks; surface water may also enter the mine through the cracks caused by coal mining along the riverbed sedimentary layer, structural fracture zone or rock layer that is conducive to water infiltration; water in the coal seam roof and floor aquifers will surge into the tunnel and become the source of mine water; and in mining areas with a long history of mining, a large amount of water has accumulated in abandoned small coal mines, old shafts and goafs, which is also the main source of mine water. During the formation process, mine water undergoes a series of physical, chemical and biochemical reactions due to contact with coal seams and rock formations and the influence of human activities. Mine water has significant characteristics of the coal industry. Its water quality contains suspended matter, waste oil, emulsified oil, surfactants contained in dust suppressants and other organic pollutants. Untreated mine water discharge and leakage will cause land salinization and vegetation withering. Scientific treatment and rational use of mine water, turning waste into treasure and harm into benefit, can not only reduce the pollution caused by disorderly discharge of mine water and save groundwater resources, but also alleviate the water shortage problem faced by coal development and downstream industrial development in my country's mining areas, which is of great significance for increasing water supply and optimizing water supply structure.

[0003] Since the mine water discharged from different mines and at different times is different, most of the suspended matter in the mine water has small particle size, light specific gravity, and contains some extremely fine negative ion colloidal particles, which have slow sedimentation speed and poor coagulation effect. Some mine water has a high content of dissolved gas. During the flocculation treatment, a large number of bubbles are attached to the surface of the flocs, causing the flocs to float upward and not sink. There are high-density flocs and coal powder at the bottom, which makes the solid-liquid separation process of water treatment complicated and the sludge difficult to completely remove. The presence of tiny floating flocs will also increase the relevant values ​​of the water quality analysis after purification, resulting in deviations. If the input of agents such as polyacrylamide is increased, it will lead to excessive chemical oxygen demand (COD), ammonia nitrogen, etc., and will also increase the cost of water treatment. In addition, the current treatment of mine water is mostly done by adding different reagents in batches, and the reagents are added in two steps. First, polyaluminum chloride or polyferric sulfate is dissolved in water to form an aqueous solution of a certain concentration, and then it is added to the mine water to be treated and stirred and condensed. Then, the already dissolved polyacrylamide aqueous solution of a certain concentration is added and stirred and mixed to make the suspended matter in the mine water to be treated flocculate and precipitate, so as to achieve the purpose of solid-liquid separation. The traditional mine water treatment operation process is complicated, the equipment investment is high, and the personnel cost is high. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a composite water purifier for mine water treatment, which is a solid powder. When feeding, it is directly put into the mine wastewater to be treated in the form of powder, and can quickly and effectively treat the mine water containing dissolved gas and negative ion colloidal particles by flocculation and sedimentation, reducing the use of various reagent dissolution operation processes and dissolution equipment, saving time, labor and cost. The water treatment process is simple to operate, the floc density and floc strength are large, the floc does not float, the sedimentation speed is fast, and the flocculation sedimentation is complete, which can prevent the floating of low-density flocs from causing sludge separation difficulties and complicated separation measures. After flocculation treatment, the water quality is clear and the transmittance is high, which can significantly reduce the chemical oxygen demand (COD), ammonia nitrogen, suspended matter, etc. in the mine water, the water treatment purification effect is significant, there is no secondary pollution, and the treatment problem of mine water with high gas content and high negative ion colloid content is solved. It is a mine water treatment powder composite water purifier with excellent comprehensive performance. The product of the present invention can also be used for other conventional mine water purification treatment and coal washing water purification treatment.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A powder composite water purifier for mine water treatment, wherein the powder composite water purifier comprises the following components calculated by mass content:

[0007] Component A: 80-90 parts of polyaluminium chloride, 2-4 parts of instant ternary copolymer cationic polyacrylamide, 20-25 parts of bentonite, and 10-15 parts of potassium aluminium sulfate;

[0008] Component B: 3-5 parts of sodium carbonate, 30-50 parts of powdered activated carbon, 60-90 parts of precipitated barium sulfate, 50-80 parts of black zinc oxide powder, 15-25 parts of sodium sulfite, and 0.5-1 part of 1690 powdered defoamer.

[0009] The preparation method of the instant ternary copolymer cationic polyacrylamide is as follows:

[0010] Step 1: Prepare a mixed monomer deionized water solution

[0011] 55.44 parts of acrylamide, 29.05 parts of acryloxyethyl trimethyl ammonium chloride, and 14.54 parts of methacryloyloxyethyl trimethyl ammonium chloride were weighed at a molar ratio of acrylamide: acryloxyethyl trimethyl ammonium chloride: methacryloyloxyethyl trimethyl ammonium chloride = 78:15:7, totaling 99.03 parts, and 231.07 parts of deionized water were added to prepare a mixed monomer aqueous solution with a mass content of 30%, totaling 330.1 parts; acrylamide, acryloxyethyl trimethyl ammonium chloride, and methacryloyloxyethyl trimethyl ammonium chloride were all weighed based on 100% purity, and finally the prepared mixed monomer aqueous solution with a mass content of 30% was placed in a glass container;

[0012] Step 2: Add additives and initiators

[0013] Add 9.9 parts of glucose powder with a mass content of 3% to the mixed monomer aqueous solution, add 0.066 parts of EDTA disodium salt with a mass content of 0.02% of the mixed monomer aqueous solution, add 0.05-0.066 parts of azobisisobutylamidine hydrochloride photoinitiator with a mass content of 0.015%-0.020% of the mixed monomer aqueous solution, stir and dissolve and mix evenly;

[0014] Step 3: Adjust the pH value of the mixed monomer aqueous solution:

[0015] Use 20% ammonia water or 20% hydrochloric acid to adjust the pH of the mixed monomer aqueous solution to 6-7;

[0016] Step 4: Nitrogen filling and deoxygenation

[0017] Bubble high-purity nitrogen into the mixed monomer aqueous solution in the third step for 10 to 15 minutes to remove oxygen from the aqueous solution;

[0018] Step 5: Copolymerization

[0019] The mixed monomer aqueous solution in the fourth step is placed under a 40W ultraviolet light with a wavelength of 365nm, the liquid surface is about 10cm above the lamp tube, and the photopolymerization reaction is carried out for 80 to 100 minutes, the initial mixed solution temperature is 19 to 21°C, and after the copolymerization reaction is completed, a colloidal cationic polyacrylamide terpolymer is obtained;

[0020] Step 6: Granulation, drying and crushing

[0021] The colloidal cationic polyacrylamide terpolymer obtained in the fifth step is granulated by a granulator, and then the colloidal particles are placed on a sieve and dried in a vacuum drying oven at a vacuum degree of 0.08-0.09 MPa, 50° C.-55° C., and a drying time of 2-4 hours. After drying, the terpolymer is taken out, crushed, and sieved, and the sieved material between 60 and 80 meshes is taken to obtain a fast-soluble ternary copolymer cationic polyacrylamide with a relative molecular mass of 8 million to 10 million and a cationic degree of 18% to 22%.

[0022] The raw materials such as polyaluminium chloride, bentonite, potassium aluminium sulfate, sodium sulfite, 1690 defoamer, sodium carbonate, activated carbon, precipitated barium sulfate, black zinc oxide, etc. described in claim 1 and claim 2 are all commercially available industrial products and are used in powder form;

[0023] According to a further preferred embodiment, the mass content of aluminum oxide in the polyaluminum chloride is 29% to 30%.

[0024] In a further preferred embodiment, the bentonite is sodium-based bentonite having a particle size greater than 300 meshes.

[0025] In a further preferred embodiment, the powdered activated carbon has a mesh size greater than 100 meshes.

[0026] In a further preferred embodiment, the precipitated barium sulfate has a particle size greater than 300 mesh and a density of 4.2 to 4.5 g / cm 3 .

[0027] In a further preferred embodiment, the black zinc oxide powder has a mesh size greater than 300 meshes and a density of 5.6 g / cm 3 .

[0028] In a further preferred embodiment, the 1690 powder defoamer is a product distributed by BYK of Germany.

[0029] In a further preferred embodiment, the acrylamide, acryloyloxyethyl trimethyl ammonium chloride, methacryloyloxyethyl trimethyl ammonium chloride, glucose powder, EDTA disodium salt, azobisisobutyramidine hydrochloride, ammonia water, and hydrochloric acid raw materials are all commercially available industrial products;

[0030] The preparation method of the powder composite water purifier for mine water treatment comprises the following steps:

[0031] Step 1: Preparation of component A: add 80-90 parts of polyaluminium chloride, 2-4 parts of instant ternary copolymer cationic polyacrylamide, 20-25 parts of bentonite and 10-15 parts of potassium aluminium sulfate into a mixer in order according to metering, stir and mix evenly to obtain component A;

[0032] Step 2, preparation of component B: add 3-5 parts of sodium carbonate, 30-50 parts of powdered activated carbon, 60-90 parts of precipitated barium sulfate, 50-80 parts of black zinc oxide powder, 15-25 parts of sodium sulfite, and 0.5-1 part of 1690 powdered defoamer into a mixer in order according to metering, stir and mix evenly to obtain component B;

[0033] Step 3: Preparation of powder composite water purifier: Mix component A obtained in the first step and component B obtained in the second step at a mass ratio of A:B=1:4-6 and stir evenly to obtain a powder composite water purifier for mine water treatment.

[0034] The powder water purifier is directly added in powder form to the mine water with high gas content and high negative ion colloid content, and stirred and mixed to purify the mine water. The amount of powder composite water purifier added is measured in 100ppm to 600ppm according to the water quality and turbidity of the mine water.

[0035] The present invention has the following advantages:

[0036] 1. The powder composite water purifier for mine water treatment proposed by the present invention directly adds the agent to the mine water to be treated in the form of powder, which reduces the use of various agents and dissolution equipment, reduces labor costs and production costs, and simplifies the water treatment process. Bentonite can prevent polyaluminum chloride and cationic polyacrylamide materials from absorbing moisture and hardening. Bentonite can also absorb heavy metal ions, organic pollutants and radioactive substances in wastewater, which helps to purify water quality. Sodium carbonate can combine with ammonia nitrogen in nitrogen-containing substances to form water-insoluble precipitates, removing nitrogen-containing pollutants.

[0037] 2. The precipitated barium sulfate and black zinc oxide powder of the present invention can increase the density and strength of flocs, and the sodium sulfite and 1690 powder defoamer can make the bubbles in the mine water and the bubbles on the surface of the flocs disappear, effectively preventing the formed flocs from rising and floating, making the flocs settle completely and quickly, establishing and creating good solid-liquid separation conditions, and having a significant water treatment and purification effect.

[0038] 3. The ternary copolymer cationic polyacrylamide has a high relative molecular mass, strong and stable floccules. It can adsorb extremely small negatively charged colloidal particles, shorten the agglomeration time of suspended matter, and achieve complete and thorough flocculation.

[0039] 4. The synergistic effect of each component solves the problem of treating mine water with high gas content and high negative ion colloid content, and can significantly reduce pollutants such as COD, ammonia nitrogen, suspended solids, and total nitrogen in mine water. It is a powder composite water purifier for mine water treatment with excellent comprehensive performance. DETAILED DESCRIPTION

[0040] Example 1

[0041] The mine water treatment powder composite water purifier described in this embodiment is calculated by mass content, and the composition and content of each component are as follows:

[0042] Component A: 80 parts of polyaluminium chloride, 2 parts of instant ternary copolymer cationic polyacrylamide, 20 parts of bentonite, and 10 parts of potassium aluminium sulfate;

[0043] Component B: 3 parts of sodium carbonate, 30 parts of powdered activated carbon, 60 parts of precipitated barium sulfate, 50 parts of black zinc oxide powder, 15 parts of sodium sulfite, and 0.5 parts of 1690 powdered defoamer.

[0044] The instant ternary copolymer cationic polyacrylamide preparation method and steps:

[0045] Step 1: Prepare a mixed monomer deionized water solution

[0046] 55.44 parts of acrylamide, 29.05 parts of acryloxyethyl trimethyl ammonium chloride and 14.54 parts of methacryloyloxyethyl trimethyl ammonium chloride were weighed at a molar ratio of acrylamide: acryloxyethyl trimethyl ammonium chloride: methacryloyloxyethyl trimethyl ammonium chloride = 78:15:7, totaling 99.03 parts, 231.07 parts of deionized water were added, and a mixed monomer aqueous solution with a mass content of 30% was prepared, totaling 330.1 parts; acrylamide, acryloxyethyl trimethyl ammonium chloride and methacryloyloxyethyl trimethyl ammonium chloride were all weighed based on 100% purity, and finally the prepared mixed monomer aqueous solution with a mass content of 30% was placed in a glass container.

[0047] Step 2: Add additives and initiators

[0048] Add 9.9 parts of glucose powder with a mass content of 3% to the mixed monomer aqueous solution, add 0.066 parts of EDTA disodium salt with a mass content of 0.02% of the mixed monomer aqueous solution, add 0.05-0.066 parts of azobisisobutylamidine hydrochloride photoinitiator with a mass content of 0.015%-0.020% of the mixed monomer aqueous solution, stir and dissolve and mix evenly;

[0049] Step 3: Adjust the pH value of the mixed monomer aqueous solution:

[0050] Use 20% ammonia water or 20% hydrochloric acid to adjust the pH of the mixed monomer aqueous solution to 6-7;

[0051] Step 4: Nitrogen filling and deoxygenation

[0052] Bubble high-purity nitrogen into the mixed monomer aqueous solution in the third step for 10 to 15 minutes to remove oxygen from the aqueous solution;

[0053] Step 5: Copolymerization

[0054] The mixed monomer aqueous solution in the fourth step is placed under a 40W ultraviolet light with a wavelength of 365nm, the liquid surface is about 10cm above the lamp tube, and the photopolymerization reaction is carried out for 80 to 100 minutes, the initial mixed solution temperature is 19 to 21°C, and after the copolymerization reaction is completed, a colloidal cationic polyacrylamide terpolymer is obtained;

[0055] Step 6: Granulation, drying and crushing

[0056] The colloidal cationic polyacrylamide terpolymer obtained in the fifth step is granulated by a granulator, and then a thin layer of colloidal particles is placed on a sieve and dried in a vacuum drying oven at a vacuum degree of 0.08-0.09 MPa, 55°C-60°C, and a drying time of 2-4 hours. After drying, the terpolymer is taken out, crushed, and sieved, and the sieved material between 60 and 80 meshes is taken to obtain an instant ternary copolymer cationic polyacrylamide dry powder with a relative molecular mass of 8 million to 10 million and a cationic degree of 18% to 22%.

[0057] The raw materials such as polyaluminium chloride, bentonite, potassium aluminium sulfate, sodium sulfite, 1690 defoamer, sodium carbonate, activated carbon, precipitated barium sulfate, black zinc oxide, etc. are all commercially available industrial products and are used in powder form.

[0058] The acrylamide, acryloyloxyethyl trimethyl ammonium chloride, methacryloyloxyethyl trimethyl ammonium chloride, glucose powder, EDTA disodium salt, azobisisobutyramidine hydrochloride, ammonia water, hydrochloric acid and the like are commercially available industrial products.

[0059] The mass content of aluminum oxide in the polyaluminium chloride is 29%, the bentonite is sodium-based bentonite, and the particle size is greater than 300 meshes; the powdered activated carbon has a mesh size greater than 100 meshes; the precipitated barium sulfate has a particle size greater than 300 meshes, and a density of 4.2-4.5 g / cm 3 ; Black powder zinc oxide mesh size greater than 300 mesh, density 5.6g / cm 3 The 1690 powder defoamer is a product distributed by BYK of Germany.

[0060] The preparation method of the mine water treatment powder composite water purifier described in this embodiment comprises the following steps:

[0061] Step 1: Preparation of component A: add 80 parts of polyaluminium chloride, 2 parts of instant ternary copolymer cationic polyacrylamide, 20 parts of bentonite and 10 parts of potassium aluminium sulfate into a mixer in order according to metering, stir and mix evenly to obtain component A;

[0062] Step 2: Preparation of component B: add 3 parts of sodium carbonate, 30 parts of powdered activated carbon, 60 parts of precipitated barium sulfate, 50 parts of black zinc oxide powder, 15 parts of sodium sulfite and 0.5 parts of 1690 powdered defoamer into a mixer in order according to metering, stir and mix evenly to obtain component B;

[0063] Step 3: Preparation of powder composite water purifier: Mix component A obtained in the first step and component B obtained in the second step at a mass ratio of A:B=1:4 and stir evenly to obtain a powder composite water purifier for mine water treatment.

[0064] The water purifier is directly added in powder form to mine water with high gas content and high negative ion colloid content. 1000ml of mine water is taken, and the amount of composite water purifier added is controlled according to the turbidity of the mine water, 100ppm~600ppm. Stir and mix for 50s~60s to dissolve the soluble materials and form dense flocs without floating. The flocs settle quickly. After 150s~180s, the water quality analysis of the purified mine water can be carried out.

[0065] Example 2

[0066] The powder composite water purifier for mine water treatment described in this embodiment is calculated by mass content and includes the following components:

[0067] Component A: 90 parts of polyaluminium chloride, 4 parts of instant ternary copolymer cationic polyacrylamide, 25 parts of bentonite, and 15 parts of potassium aluminium sulfate;

[0068] Component B: 5 parts of sodium carbonate, 50 parts of powdered activated carbon, 90 parts of precipitated barium sulfate, 80 parts of black powdered zinc oxide, 25 parts of sodium sulfite, 1 part of 1690 powdered defoamer.

[0069] The instant ternary copolymer cationic polyacrylamide preparation method and steps:

[0070] Step 1: Prepare a mixed monomer deionized water solution

[0071] 55.44 parts of acrylamide, 29.05 parts of acryloxyethyl trimethyl ammonium chloride and 14.54 parts of methacryloyloxyethyl trimethyl ammonium chloride were weighed at a molar ratio of acrylamide: acryloxyethyl trimethyl ammonium chloride: methacryloyloxyethyl trimethyl ammonium chloride = 78:15:7, totaling 99.03 parts, 231.07 parts of deionized water were added, and a mixed monomer aqueous solution with a mass content of 30% was prepared, totaling 330.1 parts; acrylamide, acryloxyethyl trimethyl ammonium chloride and methacryloyloxyethyl trimethyl ammonium chloride were all weighed based on 100% purity, and finally the prepared mixed monomer aqueous solution with a mass content of 30% was placed in a glass container.

[0072] Step 2: Add additives and initiators

[0073] Add 9.9 parts of glucose powder with a mass content of 3% to the mixed monomer aqueous solution, add 0.066 parts of EDTA disodium salt with a mass content of 0.02% of the mixed monomer aqueous solution, add 0.05-0.066 parts of azobisisobutylamidine hydrochloride photoinitiator with a mass content of 0.015%-0.020% of the mixed monomer aqueous solution, stir and dissolve and mix evenly;

[0074] Step 3: Adjust the pH value of the mixed monomer aqueous solution:

[0075] Use 20% ammonia water or 20% hydrochloric acid to adjust the pH of the mixed monomer aqueous solution to 6-7;

[0076] Step 4: Nitrogen filling and deoxygenation

[0077] Bubble high-purity nitrogen into the mixed monomer aqueous solution in the third step for 10 to 15 minutes to remove oxygen from the aqueous solution;

[0078] Step 5: Copolymerization

[0079] The mixed monomer aqueous solution in the fourth step is placed under a 40W ultraviolet light with a wavelength of 365nm, the liquid surface is about 10cm above the lamp tube, and the photopolymerization reaction is carried out for 80 to 100 minutes, the initial mixed solution temperature is 19 to 21°C, and after the copolymerization reaction is completed, a colloidal cationic polyacrylamide terpolymer is obtained;

[0080] Step 6: Granulation, drying and crushing

[0081] The colloidal cationic polyacrylamide terpolymer obtained in the fifth step is granulated by a granulator, and then a thin layer of colloidal particles is placed on a sieve and dried in a vacuum drying oven at a vacuum degree of 0.08-0.09 MPa, 55°C-60°C, and a drying time of 2-4 hours. After drying, the terpolymer is taken out, crushed, and sieved, and the sieved material between 60 and 80 meshes is taken to obtain an instant ternary copolymer cationic polyacrylamide dry powder with a relative molecular mass of 8 million to 10 million and a cationic degree of 18% to 22%.

[0082] The raw materials of polyaluminium chloride, bentonite, potassium aluminium sulfate, sodium sulfite, 1690 defoamer, sodium carbonate, activated carbon, precipitated barium sulfate and black zinc oxide are all commercially available industrial products and are used in powder form.

[0083] The acrylamide, acryloyloxyethyl trimethyl ammonium chloride, methacryloyloxyethyl trimethyl ammonium chloride, glucose powder, EDTA disodium salt, azobisisobutyramidine hydrochloride, ammonia water, hydrochloric acid and the like are commercially available industrial products.

[0084] The mass content of aluminum oxide in the polyaluminium chloride is 30%, the bentonite is sodium bentonite, and the particle size is greater than 300 mesh; the powdered activated carbon has a mesh size greater than 100 mesh; the precipitated barium sulfate has a particle size greater than 300 mesh, and a density of 4.2-4.5 g / cm 3 ; Black powder zinc oxide mesh size greater than 300 mesh, density 5.6g / cm 3 The 1690 powder defoamer is a product distributed by BYK of Germany.

[0085] The preparation method of the mine water treatment powder composite water purifier described in this embodiment comprises the following steps:

[0086] Step 1: Preparation of component A: Add 90 parts of polyaluminium chloride, 4 parts of instant ternary copolymer cationic polyacrylamide, 25 parts of bentonite and 15 parts of potassium aluminium sulfate into a mixer in order according to metering, stir and mix evenly to obtain component A, and seal and package;

[0087] Step 2, preparation of component B: add 5 parts of sodium carbonate, 50 parts of powdered activated carbon, 90 parts of precipitated barium sulfate, 80 parts of black zinc oxide powder, 25 parts of sodium sulfite and 1 part of 1690 powdered defoamer into a mixer in order according to metering, stir and mix evenly to obtain component B, and seal and package;

[0088] Step 3: Preparation of powder composite water purifier: Mix component A obtained in the first step and component B obtained in the second step at a mass ratio of A:B=1:5 and stir evenly to obtain a powder composite water purifier for mine water treatment.

[0089] The water purifier is directly added in powder form to mine water with high gas content and high negative ion colloid content. 1000ml of mine water is taken, and the amount of composite water purifier added is controlled according to the turbidity of the mine water, 100ppm~600ppm. Stir and mix for 50s~60s to dissolve the soluble materials and form dense flocs without floating. The flocs settle quickly. After 150s~180s, the water quality analysis of the purified mine water can be carried out.

[0090] Example 3

[0091] The powder composite water purifier for mine water treatment described in this embodiment is calculated by mass content and includes the following components:

[0092] Component A: 85 parts of polyaluminium chloride, 3 parts of instant ternary copolymer cationic polyacrylamide, 22 parts of bentonite, and 13 parts of potassium aluminium sulfate;

[0093] Component B: 4 parts of sodium carbonate, 40 parts of powdered activated carbon, 75 parts of precipitated barium sulfate, 65 parts of black powdered zinc oxide, 20 parts of sodium sulfite, and 0.6 parts of 1690 powdered defoamer.

[0094] The instant ternary copolymer cationic polyacrylamide preparation method and steps:

[0095] Step 1: Prepare a mixed monomer deionized water solution

[0096] 55.44 parts of acrylamide, 29.05 parts of acryloxyethyl trimethyl ammonium chloride and 14.54 parts of methacryloyloxyethyl trimethyl ammonium chloride were weighed at a molar ratio of acrylamide: acryloxyethyl trimethyl ammonium chloride: methacryloyloxyethyl trimethyl ammonium chloride = 78:15:7, totaling 99.03 parts, 231.07 parts of deionized water were added, and a mixed monomer aqueous solution with a mass content of 30% was prepared, totaling 330.1 parts; acrylamide, acryloxyethyl trimethyl ammonium chloride and methacryloyloxyethyl trimethyl ammonium chloride were all weighed based on 100% purity, and finally the prepared mixed monomer aqueous solution with a mass content of 30% was placed in a glass container.

[0097] Step 2: Add additives and initiators

[0098] Add 9.9 parts of glucose powder with a mass content of 3% to the mixed monomer aqueous solution, add 0.066 parts of EDTA disodium salt with a mass content of 0.02% of the mixed monomer aqueous solution, add 0.05-0.066 parts of azobisisobutylamidine hydrochloride photoinitiator with a mass content of 0.015%-0.020% of the mixed monomer aqueous solution, stir and dissolve and mix evenly;

[0099] Step 3: Adjust the pH value of the mixed monomer aqueous solution:

[0100] Use 20% ammonia water or 20% hydrochloric acid to adjust the pH of the mixed monomer aqueous solution to 6-7;

[0101] Step 4: Nitrogen filling and deoxygenation

[0102] Bubble high-purity nitrogen into the mixed monomer aqueous solution in the third step for 10 to 15 minutes to remove oxygen from the aqueous solution;

[0103] Step 5: Copolymerization

[0104] The mixed monomer aqueous solution in the fourth step is placed under a 40W ultraviolet light with a wavelength of 365nm, the liquid surface is about 10cm above the lamp tube, and the photopolymerization reaction is carried out for 80 to 100 minutes, the initial mixed solution temperature is 19 to 21°C, and after the copolymerization reaction is completed, a colloidal cationic polyacrylamide terpolymer is obtained;

[0105] Step 6: Granulation, drying and crushing

[0106] The colloidal cationic polyacrylamide terpolymer obtained in the fifth step is granulated by a granulator, and then a thin layer of colloidal particles is placed on a sieve and dried in a vacuum drying oven at a vacuum degree of 0.08-0.09 MPa, 55°C-60°C, and a drying time of 2-4 hours. After drying, the terpolymer is taken out, crushed, and sieved, and the sieved material between 60 and 80 meshes is taken to obtain an instant ternary copolymer cationic polyacrylamide dry powder with a relative molecular mass of 8 million to 10 million and a cationic degree of 18% to 22%.

[0107] The raw materials such as polyaluminium chloride, bentonite, potassium aluminium sulfate, sodium sulfite, 1690 defoamer, sodium carbonate, powdered activated carbon, precipitated barium sulfate, black zinc oxide, etc. are all commercially available industrial products and are used in powder form.

[0108] The raw materials such as acrylamide, acryloyloxyethyl trimethyl ammonium chloride, methacryloyloxyethyl trimethyl ammonium chloride, glucose powder, EDTA disodium salt, azobisisobutyramidine hydrochloride, ammonia water, hydrochloric acid, etc. are all commercially available industrial products.

[0109] The mass content of aluminum oxide in the polyaluminium chloride is 29%, the bentonite is sodium-based bentonite, and the particle size is greater than 300 meshes; the powdered activated carbon has a mesh size greater than 100 meshes; the precipitated barium sulfate has a particle size greater than 300 meshes, and a density of 4.2-4.5 g / cm 3 ; Black powder zinc oxide mesh size greater than 300 mesh, density 5.6g / cm 3 The 1690 powder defoamer is a product distributed by BYK of Germany.

[0110] The preparation method of the mine water treatment powder composite water purifier described in this embodiment comprises the following steps:

[0111] Step 1: Preparation of component A: Add 85 parts of polyaluminium chloride, 3 parts of instant ternary copolymer cationic polyacrylamide, 22 parts of bentonite and 13 parts of potassium aluminium sulfate into a mixer in order according to metering, stir and mix evenly to obtain component A;

[0112] Step 2: Preparation of component B: add 4 parts of sodium carbonate, 40 parts of powdered activated carbon, 75 parts of precipitated barium sulfate, 65 parts of black zinc oxide powder, 20 parts of sodium sulfite and 0.6 parts of 1690 powdered defoamer into a mixer in order according to metering, stir and mix evenly to obtain component B;

[0113] Step 3: Preparation of powder composite water purifier: Mix component A obtained in the first step and component B obtained in the second step at a mass ratio of A:B=1:6 and stir evenly to obtain a powder composite water purifier for mine water treatment.

[0114] The water purifier is directly added in powder form to mine water with high gas content and high negative ion colloid content. 1000ml of mine water is taken, and the amount of composite water purifier added is controlled according to the turbidity of the mine water, 100ppm~600ppm. Stir and mix for 50s~60s to dissolve the soluble materials and form dense flocs without floating. The flocs settle quickly. After 150s~180s, the water quality analysis of the purified mine water can be carried out.

[0115] Example 4

[0116] The powder composite water purifier for mine water treatment described in this embodiment is calculated by mass content and includes the following components:

[0117] Component A: 88 parts of polyaluminium chloride, 4 parts of instant ternary copolymer cationic polyacrylamide, 23 parts of bentonite, and 12 parts of potassium aluminium sulfate;

[0118] Component B: 5 parts of sodium carbonate, 43 parts of powdered activated carbon, 80 parts of precipitated barium sulfate, 75 parts of black powdered zinc oxide, 22 parts of sodium sulfite, 1 part of 1690 powdered defoamer.

[0119] The instant ternary copolymer cationic polyacrylamide preparation method and steps:

[0120] Step 1: Prepare a mixed monomer deionized water solution

[0121] 55.44 parts of acrylamide, 29.05 parts of acryloxyethyl trimethyl ammonium chloride and 14.54 parts of methacryloyloxyethyl trimethyl ammonium chloride were weighed at a molar ratio of acrylamide: acryloxyethyl trimethyl ammonium chloride: methacryloyloxyethyl trimethyl ammonium chloride = 78:15:7, totaling 99.03 parts, 231.07 parts of deionized water were added, and a mixed monomer aqueous solution with a mass content of 30% was prepared, totaling 330.1 parts; acrylamide, acryloxyethyl trimethyl ammonium chloride and methacryloyloxyethyl trimethyl ammonium chloride were all weighed based on 100% purity, and finally the prepared mixed monomer aqueous solution with a mass content of 30% was placed in a glass container.

[0122] Step 2: Add additives and initiators

[0123] Add 9.9 parts of glucose powder with a mass content of 3% to the mixed monomer aqueous solution, add 0.066 parts of EDTA disodium salt with a mass content of 0.02% of the mixed monomer aqueous solution, add 0.05-0.066 parts of azobisisobutylamidine hydrochloride photoinitiator with a mass content of 0.015%-0.020% of the mixed monomer aqueous solution, stir and dissolve and mix evenly;

[0124] Step 3: Adjust the pH value of the mixed monomer aqueous solution:

[0125] Use 20% ammonia water or 20% hydrochloric acid to adjust the pH of the mixed monomer aqueous solution to 6-7;

[0126] Step 4: Nitrogen filling and deoxygenation

[0127] Bubble high-purity nitrogen into the mixed monomer aqueous solution in the third step for 10 to 15 minutes to remove oxygen from the aqueous solution;

[0128] Step 5: Copolymerization

[0129] The mixed monomer aqueous solution in the fourth step is placed under a 40W ultraviolet light with a wavelength of 365nm, the liquid surface is about 10cm above the lamp tube, and the photopolymerization reaction is carried out for 80 to 100 minutes, the initial mixed solution temperature is 19 to 21°C, and after the copolymerization reaction is completed, a colloidal cationic polyacrylamide terpolymer is obtained;

[0130] Step 6: Granulation, drying and crushing

[0131] The colloidal cationic polyacrylamide terpolymer obtained in the fifth step is granulated by a granulator, and then a thin layer of colloidal particles is placed on a sieve and dried in a vacuum drying oven at a vacuum degree of 0.08-0.09 MPa, 55°C-60°C, and a drying time of 2-4 hours. After drying, the terpolymer is taken out, crushed, and sieved, and the sieved material between 60 and 80 meshes is taken to obtain an instant ternary copolymer cationic polyacrylamide dry powder with a relative molecular mass of 8 million to 10 million and a cationic degree of 18% to 22%.

[0132] The raw materials such as polyaluminium chloride, bentonite, potassium aluminium sulfate, sodium sulfite, 1690 defoamer, sodium carbonate, powdered activated carbon, precipitated barium sulfate, black zinc oxide, etc. are all commercially available industrial products and are used in powder form.

[0133] The raw materials such as acrylamide, acryloyloxyethyl trimethyl ammonium chloride, methacryloyloxyethyl trimethyl ammonium chloride, glucose powder, EDTA disodium salt, azobisisobutyramidine hydrochloride, ammonia water, hydrochloric acid, etc. are all commercially available industrial products.

[0134] The mass content of aluminum oxide in the polyaluminium chloride is 29%, the bentonite is sodium-based bentonite, and the particle size is greater than 300 meshes; the powdered activated carbon has a mesh size greater than 100 meshes; the precipitated barium sulfate has a particle size greater than 300 meshes, and a density of 4.2-4.5 g / cm 3 ; Black powder zinc oxide mesh size greater than 300 mesh, density 5.6g / cm 3 The 1690 powder defoamer is a product distributed by BYK of Germany.

[0135] The preparation method of the mine water treatment powder composite water purifier described in this embodiment comprises the following steps:

[0136] Step 1: Preparation of component A: Add 88 parts of polyaluminium chloride, 4 parts of instant ternary copolymer cationic polyacrylamide, 23 parts of bentonite and 12 parts of potassium aluminium sulfate into a mixer in order according to metering, and stir and mix evenly to obtain component A;

[0137] Step 2: Preparation of component B: add 5 parts of sodium carbonate, 43 parts of powdered activated carbon, 80 parts of precipitated barium sulfate, 75 parts of black zinc oxide powder, 22 parts of sodium sulfite and 1 part of 1690 powdered defoamer into a mixer in order according to metering, stir and mix evenly to obtain component B;

[0138] Step 3: Preparation of powder composite water purifier: Mix component A obtained in the first step and component B obtained in the second step at a mass ratio of A:B=1:5 and stir evenly to obtain a powder composite water purifier for mine water treatment.

[0139] The water purifier is directly added in powder form to mine water with high gas content and high negative ion colloid content. 1000ml of mine water is taken, and the amount of composite water purifier added is controlled according to the turbidity of the mine water, 100ppm~600ppm. Stir and mix for 50s~60s to dissolve the soluble materials and form dense flocs without floating. The flocs settle quickly. After 150s~180s, the water quality analysis of the purified mine water can be carried out.

[0140] Example 5

[0141] The powder composite water purifier for mine water treatment described in this embodiment is calculated by mass content and includes the following components:

[0142] Component A: 87 parts of polyaluminium chloride, 3 parts of instant ternary copolymer cationic polyacrylamide, 25 parts of bentonite, and 13 parts of potassium aluminium sulfate;

[0143] Component B: 3 parts of sodium carbonate, 39 parts of powdered activated carbon, 85 parts of precipitated barium sulfate, 75 parts of black powdered zinc oxide, 19 parts of sodium sulfite, and 0.7 parts of 1690 powdered defoamer.

[0144] The instant ternary copolymer cationic polyacrylamide preparation method and steps:

[0145] Step 1: Prepare a mixed monomer deionized water solution

[0146] 55.44 parts of acrylamide, 29.05 parts of acryloxyethyl trimethyl ammonium chloride and 14.54 parts of methacryloyloxyethyl trimethyl ammonium chloride were weighed at a molar ratio of acrylamide: acryloxyethyl trimethyl ammonium chloride: methacryloyloxyethyl trimethyl ammonium chloride = 78:15:7, totaling 99.03 parts, 231.07 parts of deionized water were added, and a mixed monomer aqueous solution with a mass content of 30% was prepared, totaling 330.1 parts; acrylamide, acryloxyethyl trimethyl ammonium chloride and methacryloyloxyethyl trimethyl ammonium chloride were all weighed based on 100% purity, and finally the prepared mixed monomer aqueous solution with a mass content of 30% was placed in a glass container.

[0147] Step 2: Add additives and initiators

[0148] Add 9.9 parts of glucose powder with a mass content of 3% to the mixed monomer aqueous solution, add 0.066 parts of EDTA disodium salt with a mass content of 0.02% of the mixed monomer aqueous solution, add 0.05-0.066 parts of azobisisobutylamidine hydrochloride photoinitiator with a mass content of 0.015%-0.020% of the mixed monomer aqueous solution, stir and dissolve and mix evenly;

[0149] Step 3: Adjust the pH value of the mixed monomer aqueous solution:

[0150] Use 20% ammonia water or 20% hydrochloric acid to adjust the pH of the mixed monomer aqueous solution to 6-7;

[0151] Step 4: Nitrogen filling and deoxygenation

[0152] Bubble high-purity nitrogen into the mixed monomer aqueous solution in the third step for 10 to 15 minutes to remove oxygen from the aqueous solution;

[0153] Step 5: Copolymerization

[0154] The mixed monomer aqueous solution in the fourth step is placed under a 40W ultraviolet light with a wavelength of 365nm, the liquid surface is about 10cm above the lamp tube, and the photopolymerization reaction is carried out for 80 to 100 minutes, the initial mixed solution temperature is 19 to 21°C, and after the copolymerization reaction is completed, a colloidal cationic polyacrylamide terpolymer is obtained;

[0155] Step 6: Granulation, drying and crushing

[0156] The colloidal cationic polyacrylamide terpolymer obtained in the fifth step is granulated by a granulator, and then a thin layer of colloidal particles is placed on a sieve and dried in a vacuum drying oven at a vacuum degree of 0.08-0.09 MPa, 55°C-60°C, and a drying time of 2-4 hours. After drying, the terpolymer is taken out, crushed, and sieved, and the sieved material between 60 and 80 meshes is taken to obtain an instant ternary copolymer cationic polyacrylamide dry powder with a relative molecular mass of 8 million to 10 million and a cationic degree of 18% to 22%.

[0157] The raw materials such as polyaluminium chloride, bentonite, potassium aluminium sulfate, sodium sulfite, 1690 defoamer, sodium carbonate, activated carbon, precipitated barium sulfate, black powder zinc oxide, etc. are all commercially available industrial products and are used in powder form.

[0158] The raw materials such as acrylamide, acryloyloxyethyl trimethyl ammonium chloride, methacryloyloxyethyl trimethyl ammonium chloride, glucose powder, EDTA disodium salt, azobisisobutyramidine hydrochloride, ammonia water, hydrochloric acid, etc. are all commercially available industrial products.

[0159] The mass content of aluminum oxide in the polyaluminium chloride is 30%, the bentonite is sodium bentonite, and the particle size is greater than 300 mesh; the powdered activated carbon has a mesh size greater than 100 mesh; the precipitated barium sulfate has a particle size greater than 300 mesh, and a density of 4.2-4.5 g / cm 3 ; The mesh size of black zinc oxide powder is greater than 300 mesh, and the density is 5.6g / cm 3 The 1690 powder defoamer is a product distributed by BYK of Germany.

[0160] The preparation method of the mine water treatment powder composite water purifier described in this embodiment comprises the following steps:

[0161] Step 1: Preparation of component A: Add 87 parts of polyaluminium chloride, 3 parts of instant ternary copolymer cationic polyacrylamide, 25 parts of bentonite and 13 parts of potassium aluminium sulfate into a mixer in order according to metering, stir and mix evenly to obtain component A;

[0162] Step 2, preparation of component B: add 3 parts of sodium carbonate, 39 parts of powdered activated carbon, 85 parts of precipitated barium sulfate, 75 parts of black zinc oxide powder, 19 parts of sodium sulfite, and 0.7 parts of 1690 powdered defoamer into a mixer in order according to metering, stir and mix evenly to obtain component B;

[0163] Step 3: Preparation of powder composite water purifier: Mix component A obtained in the first step and component B obtained in the second step at a mass ratio of A:B=1:6 and stir evenly to obtain a powder composite water purifier for mine water treatment.

[0164] The water purifier is directly added in powder form to mine water with high gas content and high negative ion colloid content. 1000ml of mine water is taken, and the amount of composite water purifier added is controlled according to the turbidity of the mine water, 100ppm~600ppm. Stir and mix for 50s~60s to dissolve the soluble materials and form dense flocs without floating. The flocs settle quickly. After 150s~180s, the water quality analysis of the purified mine water can be carried out.

[0165] The treatment results of mine water with high gas content and high negative ion colloid content are shown in Table 1. The pH tester was produced by Sartorius Scientific Instruments (Beijing) Co., Ltd., model: PB-10; the transmittance tester was the 721G100 product of Shanghai Yidian Analytical Instrument Co., Ltd.; the chemical oxygen demand (COD), ammonia nitrogen, total phosphorus, and total nitrogen content tester was the UV-visible intelligent multi-parameter water quality tester produced by Beijing Lianhua Yongxing Technology Development Co., Ltd., model LH-3BA (V12).

[0166] Table 1. Analysis results of treatment of mine water with high gas and high negative ion colloid content

[0167] name Original mine water quality Water quality after purification Class III surface water index requirements pH 5～7 6～8 6～9 Light transmittance / %,≥ 85 96 －－－ COD / (mg / L), ≤ 48 11 20 Ammonia nitrogen / (mg / L), ≤ 2.0 0.70 1.0 Total phosphorus / (mg / L), ≤ 0.2 0.02 0.2 Total nitrogen / (mg / L), ≤ 6.1 0.85 1.0

[0168] It can be seen from the data in the table that after the original mine water is purified by the powder composite water purifier of the present invention, the water quality meets the requirements of Class III surface water discharge index. The product of the invention is easy to use, simple in process operation, and has a significant purification effect after water treatment. It adds a new water treatment agent and method to the treatment of special mine water, and has outstanding characteristics and novelty. The product of the present invention can also be used for the purification of other conventional mine water and coal washing wastewater.

Claims

1. A powder composite water purifier for mine water treatment, characterized in that: The powder composite water purifier is calculated by mass content and includes the following components: Component A: 80-90 parts of polyaluminium chloride, 2-4 parts of instant ternary copolymer cationic polyacrylamide, 20-25 parts of bentonite, and 10-15 parts of potassium aluminium sulfate; Component B: 3-5 parts of sodium carbonate, 30-50 parts of powdered activated carbon, 60-90 parts of precipitated barium sulfate, 50-80 parts of black zinc oxide powder, 15-25 parts of sodium sulfite, and 0.5-1 part of 1690 powdered defoamer.

2. The powder composite water purifier for mine water treatment according to claim 1, characterized in that: The preparation method of the instant ternary copolymer cationic polyacrylamide is as follows: Step 1: Prepare a mixed monomer deionized water solution 55.44 parts of acrylamide, 29.05 parts of acryloxyethyl trimethyl ammonium chloride, and 14.54 parts of methacryloyloxyethyl trimethyl ammonium chloride were weighed at a molar ratio of acrylamide: acryloxyethyl trimethyl ammonium chloride: methacryloyloxyethyl trimethyl ammonium chloride = 78:15:7, totaling 99.03 parts, and 231.07 parts of deionized water were added to prepare a mixed monomer aqueous solution with a mass content of 30%, totaling 330.1 parts; acrylamide, acryloxyethyl trimethyl ammonium chloride, and methacryloyloxyethyl trimethyl ammonium chloride were all weighed based on 100% purity, and finally the prepared mixed monomer aqueous solution with a mass content of 30% was placed in a glass container; Step 2: Add additives and initiators Add 9.9 parts of glucose powder with a mass content of 3% to the mixed monomer aqueous solution, add 0.066 parts of EDTA disodium salt with a mass content of 0.02% of the mixed monomer aqueous solution, add 0.05-0.066 parts of azobisisobutylamidine hydrochloride photoinitiator with a mass content of 0.015%-0.020% of the mixed monomer aqueous solution, stir and dissolve to mix evenly; Step 3: Adjust the pH value of the mixed monomer aqueous solution: Use 20% ammonia water or 20% hydrochloric acid to adjust the pH of the mixed monomer aqueous solution to 6-7; Step 4: Nitrogen filling and deoxygenation Bubble high-purity nitrogen into the mixed monomer aqueous solution in the third step for 10 to 15 minutes to remove oxygen from the aqueous solution; Step 5: Copolymerization The mixed monomer aqueous solution in the fourth step is placed under a 40W ultraviolet light with a wavelength of 365nm, the liquid surface is about 10cm above the lamp tube, and the photopolymerization reaction is carried out for 80 to 100 minutes, the initial mixed solution temperature is 19 to 21°C, and after the copolymerization reaction is completed, a colloidal cationic polyacrylamide terpolymer is obtained; Step 6: Granulation, drying and crushing The colloidal cationic polyacrylamide terpolymer prepared in the fifth step is granulated by a granulator, and then the colloidal particles are placed on a screen, and dried in a vacuum drying oven, with a vacuum degree of 0.08-0.09Mpa, 50°C-55°C, and a drying time of 2-4 hours. After drying, the terpolymer is taken out, crushed, and sieved, and the sieved material between 60 and 80 meshes is taken to obtain an instant terpolymer cationic polyacrylamide with a relative molecular mass of 8 million to 10 million and a cationic degree of 18% to 22%; The raw materials such as polyaluminium chloride, bentonite, potassium aluminium sulfate, sodium sulfite, 1690 defoamer, sodium carbonate, activated carbon, precipitated barium sulfate, black zinc oxide, etc. are all commercially available industrial products and are used in powder form.

3. The powder composite water purifier for mine water treatment according to claim 1, characterized in that: The mass content of aluminum oxide in the polyaluminum chloride is 29% to 30%.

4. The powder composite water purifier for mine water treatment according to claim 1, characterized in that: The bentonite is sodium-based bentonite with a particle size greater than 300 meshes.

5. The powder composite water purifier for mine water treatment according to claim 1, characterized in that: The powdered activated carbon has a mesh size greater than 100 meshes.

6. The powder composite water purifier for mine water treatment according to claim 1, characterized in that: The particle size of the precipitated barium sulfate is greater than 300 meshes and the density is 4.2-4.5 g / cm3.

7. The powder composite water purifier for mine water treatment according to claim 1, characterized in that: The black zinc oxide powder has a mesh size greater than 300 meshes and a density of 5.6 g / cm3.

8. The powder composite water purifier for mine water treatment according to claim 1, characterized in that: The 1690 powder defoamer is a product distributed by BYK of Germany.

9. The powder composite water purifier for mine water treatment according to claim 2, characterized in that: The acrylamide, acryloyloxyethyl trimethyl ammonium chloride, methacryloyloxyethyl trimethyl ammonium chloride, glucose powder, EDTA disodium salt, azobisisobutyramidine hydrochloride, ammonia water, and hydrochloric acid raw materials are all commercially available industrial products.

10. The method for preparing the powder composite water purifier for mine water treatment according to claim 1, characterized in that: The following steps are involved: Step 1: Preparation of component A: add 80-90 parts of polyaluminium chloride, 2-4 parts of instant ternary copolymer cationic polyacrylamide, 20-25 parts of bentonite and 10-15 parts of potassium aluminium sulfate into a mixer in order according to metering, stir and mix evenly to obtain component A; Step 2, preparation of component B: add 3-5 parts of sodium carbonate, 30-50 parts of powdered activated carbon, 60-90 parts of precipitated barium sulfate, 50-80 parts of black zinc oxide powder, 15-25 parts of sodium sulfite, and 0.5-1 part of 1690 powdered defoamer into a mixer in order according to metering, stir and mix evenly to obtain component B; Step 3: Preparation of powder composite water purifier: Mix component A obtained in the first step and component B obtained in the second step at a mass ratio of A:B = 1:4-6 and stir evenly to obtain a powder composite water purifier for mine water treatment.