High-difficult water anti-impact purifying agent and preparation method thereof

Abstract

The application provides a high-difficult water anti-impact water purifying agent and a preparation method thereof. The high-difficult water anti-impact water purifying agent is prepared from the following raw materials in parts by mass: sodium metaaluminate 10-15 parts, sodium silicate 5-10 parts, activated carbon 6-9 parts, carboxymethyl cellulose 6-13 parts, polyaluminum ferric chloride 15-20 parts, polyferric sulfate 12-18 parts, potassium chlorate 10-15 parts, polydimethyl diallyl ammonium chloride 5-10 parts, dicyandiamide formaldehyde resin 10-15 parts, and polyacrylamide 2-6 parts. The high-difficult water anti-impact water purifying agent prepared by the application can treat the turbidity and suspended solids of high-turbidity water, low-temperature and low-turbidity water, printing and dyeing wastewater and petrochemical wastewater, and the treated wastewater is colorless, odorless and has obviously reduced CODcr, BOD5, SS suspended solids, color value and bacteria; no secondary pollution is generated in the process of treating the printing and dyeing wastewater; the preparation process is simple, the cost is low, the performance is stable, and the application is convenient to popularize.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, and more specifically, to a high-strength, water-resistant, shock-resistant water purifier and its preparation method. Background Technology

[0002] Residents' drinking water largely comes from the purification treatment of river water and reservoir water. During the purification process, they often encounter situations where the water is highly turbid due to rain or flash floods, or low-temperature, low-turbidity water. Therefore, the treatment of river water and reservoir water is very difficult, and the treated water often fails to meet the standards.

[0003] Wastewater from the dyeing and printing industry is characterized by high color intensity, high organic content, and significant variations in temperature, volume, quality, and pH. Flocculation and decolorization are among the most challenging processes in treating dyeing and printing wastewater.

[0004] The petroleum and petrochemical industries often encounter wastewater with high turbidity, high oil content, and high COD, which is very difficult to treat.

[0005] The four types of water mentioned above share common characteristics: they are difficult to treat and place a significant impact on water treatment systems. Currently, all four types of water are treated by adding ordinary water purification agents, but the treatment effects on CODcr, BOD5, SS (suspended solids), color, and bacteria are not ideal.

[0006] Therefore, there is an urgent need to develop a shock-resistant water purification agent for treating highly difficult water, in order to solve the aforementioned challenges in existing high-difficulty water treatment methods. Summary of the Invention

[0007] Therefore, the primary objective of this invention is to provide a high-impact water purification agent that combines inorganic and organic substances. It features turbidity removal, decolorization, oil removal, sterilization, and impact resistance. It can treat high-turbidity water, low-temperature low-turbidity water, dyeing and printing wastewater, and petroleum and petrochemical wastewater, reducing turbidity and suspended solids. Simultaneously, it renders the treated wastewater colorless and odorless, reducing CODcr, BOD5, SS, color value, and bacteria. Furthermore, it does not generate secondary pollution during the treatment of dyeing and printing wastewater, making it more suitable for applications involving the treatment of highly difficult water.

[0008] The second objective of this invention is to provide a method for preparing the above-mentioned high-difficulty water-resistant water purification agent, which has a simple production process and is convenient for on-site application.

[0009] In order to achieve the above-mentioned objectives of the present invention, the following technical solution is adopted:

[0010] A high-impact water purification agent is mainly made from the following raw materials in parts by weight: 10-15 parts sodium aluminate, 5-10 parts sodium silicate, 6-9 parts activated carbon, 6-13 parts carboxymethyl cellulose, 15-20 parts polyaluminum ferric chloride, 12-18 parts polyferric sulfate, 10-15 parts potassium chlorate, 5-10 parts polydimethyldiallylammonium chloride, 10-15 parts dicyandiamide-formaldehyde resin, and 2-6 parts polyacrylamide.

[0011] Furthermore, it is mainly made from the following raw materials in parts by mass: 11-14 parts sodium aluminate, 6-9 parts sodium silicate, 7-8 parts activated carbon, 7-12 parts carboxymethyl cellulose, 16-19 parts polyaluminum ferric chloride, 13-17 parts polyferric sulfate, 11-14 parts potassium chlorate, 6-9 parts polydimethyldiallylammonium chloride, 11-14 parts dicyandiamide-formaldehyde resin, and 3-5 parts polyacrylamide.

[0012] Furthermore, it is mainly made from the following raw materials in parts by mass: 12 parts sodium aluminate, 8 parts sodium silicate, 8 parts activated carbon, 9 parts carboxymethyl cellulose, 18 parts polyaluminum ferric chloride, 14 parts polyferric sulfate, 12 parts potassium chlorate, 8 parts polydimethyldiallyl ammonium chloride, 12 parts dicyandiamide formaldehyde resin, and 4 parts polyacrylamide.

[0013] This invention also provides a method for preparing the high-strength water-resistant and shock-resistant water purification agent as described above, comprising the following steps:

[0014] A. Add sodium aluminate, sodium silicate, activated carbon, and carboxymethyl cellulose to the wastewater, stir for the first time, let stand for 20-30 minutes, and take the supernatant.

[0015] B. Add polyaluminum ferric chloride, polyferric sulfate, and potassium chlorate to the wastewater treated in step A, stir for the second time, let stand for 15-20 minutes, and take the supernatant.

[0016] C. Add polydimethyldiallyl ammonium chloride, dicyandiamide-formaldehyde resin, and polyacrylamide to the clear liquid treated in step B, stir for the third time, let stand for 20-30 minutes; filter to complete the purification of wastewater.

[0017] Furthermore, the stirring speed in step A is 100-150 r / min for the first stirring.

[0018] Furthermore, the second stirring speed in step B is 80-120 r / min.

[0019] Furthermore, the stirring speed in the third stirring step C is 80-100 r / min.

[0020] Furthermore, the first stirring time in step A is 1.5-3 minutes.

[0021] Furthermore, the second stirring time in step B is 5-10 minutes.

[0022] Furthermore, the third stirring time in step C is 1-2 minutes.

[0023] Among the aforementioned raw materials, sodium aluminate, sodium silicate, and carboxymethyl cellulose possess the ability to treat neutral and acidic pollutants. Sodium aluminate (NaAlO2) is an inorganic compound with the chemical formula NaAlO2. It is a white crystalline powder, readily hygroscopic, extremely soluble in water, insoluble in ethanol, and its aqueous solution is alkaline. In water treatment, it can be used as an additive in water purification agents. Sodium silicate is a soluble inorganic silicate, commonly known as sodium silicate, with the chemical formula Na2O·nSiO2. Sodium silicate plays a role in synthetic detergents as a washing aid, preservative, and foam stabilizer. Carboxymethyl cellulose is a product obtained by carboxylation of natural cellulose. It is a non-toxic and odorless white flocculent powder. Aqueous solutions of carboxymethyl cellulose are neutral or alkaline transparent viscous liquids. They have thickening, film-forming, adhesive, moisture retention, colloidal protection, emulsification and suspension functions. They are stable, easily soluble in water, soluble in other water-soluble glues and resins, and insoluble in organic solvents such as ethanol. Carboxymethyl cellulose can be used as a thickener, suspending agent, emulsifier, dispersant and stabilizer.

[0024] Polyaluminum ferric chloride, polyferric sulfate, polydimethyldiallyl ammonium chloride, and dicyandiamide-formaldehyde resin all possess the ability to treat neutral and alkaline pollutants and remove oil. Polyaluminum ferric chloride was developed based on in-depth research into the hydrolysis and coagulation mechanisms of polyaluminum chloride and ferric chloride. It combines the advantages of aluminum and iron salt coagulation, significantly improving the morphology of both aluminum and iron ions and greatly increasing the degree of polymerization. It appears as a brownish-red powder or granules, is highly soluble in water, and can be used for the treatment of drinking water, industrial water, industrial wastewater, and domestic sewage. In addition to reducing residual turbidity and color, its coagulation effect includes rapid floc formation, high adsorption capacity, and good sludge filtration and dewatering performance. Especially when treating high-turbidity water or low-temperature, low-turbidity water, its treatment effect is better than that of alum, polyferric sulfate, and ferric chloride.

[0025] Polyferric sulfate is a high-performance inorganic polymeric coagulant. It is a pale yellow, amorphous powder that is highly soluble in water; a 10% (by mass) aqueous solution is a reddish-brown, transparent solution. It is highly hygroscopic. Polyferric sulfate is widely used in the purification of drinking water, industrial water, various industrial wastewaters, municipal sewage, and sludge dewatering.

[0026] Polydiallyl dimethylammonium chloride is a chemical substance with the molecular formula (C8H16NCl). nIt is a strong cationic polyelectrolyte, appearing as a colorless to pale yellow viscous liquid. It is safe, non-toxic, readily soluble in water, non-flammable, has strong coagulant properties, good hydrolytic stability, does not form gels, is insensitive to pH changes, and is chlorine resistant. Its freezing point is approximately -2.8℃, specific gravity is approximately 1.04 g / cm³, and decomposition temperature is 280-300℃. It is used as a cationic coagulant in wastewater treatment.

[0027] Dicyandiamide-formaldehyde resin is a quaternary ammonium salt polymer, appearing as a colorless or pale yellow viscous liquid. It can be used to treat colored wastewater from textile printing and dyeing, municipal sewage, and chemical wastewater, while simultaneously reducing other pollutants in the water, lowering wastewater color, and improving effluent quality. It is particularly useful in water treatment applications such as reclaimed water reuse and pretreatment of small amounts of high-concentration colored wastewater. When the wastewater concentration is high, dicyandiamide-formaldehyde resin can be neutralized with polyaluminum ferric chloride before use.

[0028] Activated carbon possesses both adsorption and color transmission capabilities. It is prepared from carbon-containing raw materials such as wood, coal, and petroleum coke through pyrolysis and activation processing. It is a general term for carbon materials with a well-developed pore structure, large specific surface area, and abundant surface chemical groups, exhibiting strong specific adsorption capacity. It is typically a porous amorphous carbon in powder or granular form with strong adsorption capacity. It is obtained by carbonizing solid carbonaceous materials (such as coal, wood, nutshells, fruit kernels, resins, etc.) at high temperatures of 600–900℃ under air-isolated conditions, followed by oxidation activation at 400–900℃ using air, carbon dioxide, water vapor, or a mixture of these gases. Activated carbon is mainly used as a solid adsorbent to adsorb substances with high boiling points and critical temperatures, as well as large molecular weight organic compounds. Its application in water treatment and other fields is also showing an increasing trend.

[0029] Potassium chlorate has the ability to kill bacteria and treat COD (Chemical Oxygen Demand). Potassium chlorate (KClO3) is an inorganic compound, a colorless or white crystalline powder with a salty and cool taste. It is a strong oxidizing agent and stable at room temperature. Potassium chlorate can inhibit the growth of bacteria and fungi and has a strong killing effect on some common pathogens. In water treatment, potassium chlorate can be used as a disinfectant to inactivate bacteria and viruses in water.

[0030] Polyacrylamide (PAM) possesses comprehensive water treatment capabilities, including turbidity removal, suspended solids removal, and auxiliary water purification. PAM is a linear polymer with the chemical formula (C3H5NO). nIt is a hard, glassy solid at room temperature with good thermal stability. It dissolves in water in any proportion, forming a homogeneous, transparent liquid in aqueous solution. Due to the presence of amide groups in its structural units, polyacrylamide readily forms hydrogen bonds, giving it excellent water solubility and high chemical activity. It is easily modified through grafting or cross-linking to obtain various branched or network structures, making it widely used in industries such as petroleum extraction, water treatment, textiles, papermaking, mineral processing, pharmaceuticals, and agriculture, earning it the nickname "auxiliary agent for all industries." The fastest-growing sectors in terms of usage are water treatment and papermaking.

[0031] Among the above-mentioned raw material component ratios, the optimal water purification agent exhibits the best treatment effect when the mass ratio of sodium aluminate, sodium silicate, activated carbon, and carboxymethyl cellulose is approximately 1.5:1:1:1.125; the optimal mass ratio of polyaluminum ferric chloride, polyferric sulfate, and potassium chlorate is approximately 2.25:1.75:1.5; and the optimal mass ratio of polydimethyldiallylammonium chloride, dicyandiamide-formaldehyde resin, and polyacrylamide is approximately 1:1.625:0.375.

[0032] Compared with the prior art, the beneficial effects of this invention are as follows:

[0033] The high-impact water purification agent prepared by this invention exhibits good synergy among its raw material components. It can not only treat the turbidity and suspended solids of high-turbidity water, low-temperature low-turbidity water, dyeing and printing wastewater, and petroleum and petrochemical wastewater, but also simultaneously make the treated wastewater colorless, odorless, and significantly reduce CODcr, BOD5, SS suspended solids, color value, and bacteria. The use of this water purification agent to treat dyeing and printing wastewater does not generate secondary pollution, and the preparation process is simple, low-cost, and the product has stable performance, making it easy to promote. Detailed Implementation

[0034] The embodiments of the present invention will be described in detail below with reference to examples. However, those skilled in the art will understand that the following examples are for illustrative purposes only and should not be considered as limiting the scope of the invention. Unless otherwise specified in the examples, conventional conditions or conditions recommended by the manufacturer are followed. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0035] Example 1

[0036] A sample of high-turbidity influent from a reservoir was tested and found to contain 3500 mg / L of suspended solids (SS), 7.23 pH, and 2200 NTU turbidity.

[0037] (1) Add 12g of sodium aluminate, 8g of sodium silicate, 8g of activated carbon and 9g of carboxymethyl cellulose to 10L of high turbidity water, stir at 150r / min for 3min, let stand for 30min, and take the supernatant.

[0038] (2) Add 18g of polyaluminum ferric chloride, 14g of polyferric sulfate and 12g of potassium chlorate to the water treated in step (1), stir at 120r / min for 10min, let stand for 20min, and take the supernatant.

[0039] (3) Add 8g of polydimethyldiallylammonium chloride, 12g of dicyandiamide formaldehyde resin and 4g of polyacrylamide to the clear liquid after step (2), stir at 100r / min for 2min, let stand for 30min, filter, and complete the purification of high turbidity water.

[0040] Example 2

[0041] A sample of low-temperature, low-turbidity influent from a reservoir was tested and found to contain 5 mg / L of suspended solids (SS), 7.34 pH, and 9 NTU of turbidity.

[0042] (1) Add 15g of sodium aluminate, 10g of sodium silicate, 9g of activated carbon and 13g of carboxymethyl cellulose to 100L of high turbidity water, stir at 150r / min for 3min, let stand for 30min, and take the supernatant.

[0043] (2) Add 20g of polyaluminum ferric chloride, 18g of polyferric sulfate and 15g of potassium chlorate to the water treated in step (1), stir at 120r / min for 10min, let stand for 20min, and take the supernatant.

[0044] (3) Add 10g of polydimethyldiallylammonium chloride, 15g of dicyandiamide formaldehyde resin and 6g of polyacrylamide to the clear liquid after step (2), stir at 100r / min for 2min, let stand for 30min, filter, and complete the purification of low temperature and low turbidity water.

[0045] Example 3

[0046] Wastewater from a dyeing and printing enterprise was collected. The wastewater was purplish-red in color. After testing, the CODcr value of the wastewater was 1635 mg / L, the BOD5 was 450.0 mg / L, the SS was 530 mg / L, the pH was 11.15, and the color was 1100.

[0047] (1) Add 10g of sodium aluminate, 5g of sodium silicate, 6g of activated carbon and 6g of carboxymethyl cellulose to 100L of high turbidity water, stir at 150r / min for 3min, let stand for 30min, and take the supernatant.

[0048] (2) Add 15g of polyaluminum ferric chloride, 12g of polyferric sulfate and 10g of potassium chlorate to the water treated in step (1), stir at 120r / min for 10min, let stand for 20min, and take the supernatant.

[0049] (3) Add 5g of polydimethyldiallylammonium chloride, 10g of dicyandiamide formaldehyde resin and 2g of polyacrylamide to the clear liquid after step (2), stir at 100r / min for 2min, let stand for 30min, filter, and complete the purification of dyeing and printing wastewater.

[0050] Example 4

[0051] Wastewater from a petrochemical plant was collected. The wastewater was grayish-black. Tests showed that the CODcr value of the wastewater was 1555 mg / L, BOD5 was 613.0 mg / L, SS was 321 mg / L, pH was 8.2, and oil content was 160 mg / L.

[0052] (1) Add 13g of sodium aluminate, 9g of sodium silicate, 8g of activated carbon and 11g of carboxymethyl cellulose to 100L of high turbidity water, stir at 150r / min for 3min, let stand for 30min, and take the supernatant.

[0053] (2) Add 19g of polyaluminum ferric chloride, 16g of polyferric sulfate and 13g of potassium chlorate to the water treated in step (1), stir at 120r / min for 10min, let stand for 20min, and take the supernatant.

[0054] (3) Add 9g of polydimethyldiallylammonium chloride, 14g of dicyandiamide formaldehyde resin and 3g of polyacrylamide to the clear liquid after step (2), stir at 100r / min for 2min, let stand for 30min, filter, and complete the purification of wastewater.

[0055] Comparative Example 1

[0056] The specific operating steps are the same as in Example 1, except that polyacrylamide is no longer added to the raw materials. High-turbidity influent from a reservoir was taken and tested. The SS content in the high-turbidity influent was 3500 mg / L, the pH was 7.23, and the turbidity was 2200 NTU.

[0057] (1) Add 12g of sodium aluminate, 8g of sodium silicate, 8g of activated carbon and 9g of carboxymethyl cellulose to 10L of high turbidity water, stir at 150r / min for 3min, let stand for 30min, and take the supernatant.

[0058] (2) Add 18g of polyaluminum ferric chloride, 14g of polyferric sulfate and 12g of potassium chlorate to the water treated in step (1), stir at 120r / min for 10min, let stand for 20min, and take the supernatant.

[0059] (3) Add 8g of polydimethyldiallylammonium chloride and 12g of dicyandiamide formaldehyde resin to the clear liquid after step (2), stir at 100r / min for 2min, let stand for 30min, filter, and complete the purification of high turbidity water.

[0060] Comparative Example 2

[0061] The specific operating steps are the same as in Example 2, except that sodium silicate is no longer added to the raw materials. Low-temperature, low-turbidity influent from a reservoir was taken and tested. The SS content in the influent was 5 mg / L, the pH was 7.34, and the turbidity was 9 NTU.

[0062] (1) Add 15g of sodium aluminate, 9g of activated carbon and 13g of carboxymethyl cellulose to 100L of high turbidity water, stir at 150r / min for 3min, let stand for 30min, and take the supernatant.

[0063] (2) Add 20g of polyaluminum ferric chloride, 18g of polyferric sulfate and 15g of potassium chlorate to the water treated in step (1), stir at 120r / min for 10min, let stand for 20min, and take the supernatant.

[0064] (3) Add 10g of polydimethyldiallylammonium chloride, 15g of dicyandiamide formaldehyde resin and 6g of polyacrylamide to the clear liquid after step (2), stir at 100r / min for 2min, let stand for 30min, filter, and complete the purification of low temperature and low turbidity water.

[0065] Comparative Example 3

[0066] The specific operating steps are the same as in Example 3, except that potassium chlorate is no longer added to the raw materials. Wastewater from a dyeing and printing enterprise was taken. The wastewater was purplish-red. After testing, the CODcr value of the wastewater was 1635 mg / L, BOD5 was 450.0 mg / L, SS was 530 mg / L, pH was 11.15, and color was 1100.

[0067] (1) Add 10g of sodium aluminate, 5g of sodium silicate, 6g of activated carbon and 6g of carboxymethyl cellulose to 100L of high turbidity water, stir at 150r / min for 3min, let stand for 30min, and take the supernatant.

[0068] (2) Add 15g of polyaluminum ferric chloride and 12g of polyferric sulfate to the water treated in step (1), stir at 80-120r / min for 10min, let stand for 20min, and take the supernatant.

[0069] (3) Add 5g of polydimethyldiallylammonium chloride, 10g of dicyandiamide formaldehyde resin and 2g of polyacrylamide to the clear liquid after step (2), stir at 100r / min for 2min, let stand for 30min, filter, and complete the purification of dyeing and printing wastewater.

[0070] Comparative Example 4

[0071] The specific operating steps are the same as in Example 4, except that polydimethyldiallyl ammonium chloride and dicyandiamide formaldehyde resin are no longer added to the raw materials. Wastewater from a petrochemical enterprise was taken. This wastewater was grayish-black. Testing revealed that the CODcr value of this dyeing wastewater was 1555 mg / L, BOD5 was 613.0 mg / L, SS was 321 mg / L, pH was 8.2, and oil content was 160 mg / L.

[0072] (1) Add 13g of sodium aluminate, 9g of sodium silicate, 8g of activated carbon and 11g of carboxymethyl cellulose to 100L of high turbidity water, stir at 150r / min for 3min, let stand for 30min, and take the supernatant.

[0073] (2) Add 19g of polyaluminum ferric chloride, 16g of polyferric sulfate and 13g of potassium chlorate to the water treated in step (1), stir at 120r / min for 10min, let stand for 20min, and take the supernatant.

[0074] (3) Add 3g of polyacrylamide to the clear liquid after step (2), stir at 100r / min for 2min, let stand for 30min, filter, and complete the purification of wastewater.

[0075] Test Results

[0076] The treatment effects of the above-mentioned examples and comparative examples were tested using performance tests. The test results are as follows: Example 1: The purified water had an SS of 2 mg / L, pH 7.13, and turbidity of 1.8 NTU. Example 2: The purified water had an SS of 1 mg / L, pH 7.32, and turbidity of 0.6 NTU. Example 3: The purified water had a CODcr of 6 mg / L, BOD5 of 4 mg / L, SS of 1.8 mg / L, pH 11.02, and color of 1. Example 4: The purified water had a CODcr of 12 mg / L, BOD5 of 7 mg / L, SS of 3 mg / L, pH 8.1, and oil content of 2 mg / L. Comparative Example 1: The purified water had an SS of 6 mg / L, pH 7.15, and turbidity of 4 NTU. Comparative Example 2: The purified water had an SS of 2 mg / L, pH 7.22, and turbidity of 2.3 NTU. Comparative Example 3: The purified water had a CODcr of 14 mg / L, BOD5 of 8 mg / L, SS of 2.1 mg / L, pH of 11.11, and a color of 2. Comparative Example 4: The purified water had a CODcr of 20 mg / L, BOD5 of 10 mg / L, SS of 5 mg / L, pH of 8.3, and an oil content of 3 mg / L.

[0077] The measurement results are shown in Table 1:

[0078] Table 1

[0079]

[0080] As can be seen from the measurement results in Table 1, with a reasonable component mass ratio, the water treatment effects of Examples 1-4 are all superior to those of Comparative Examples 1-4. The raw material formulation of the present invention is scientifically reasonable, and overall, the effect produced by using the upper limit of the dosage range for each raw material component in Example 2 is the most excellent.

[0081] Comparing Comparative Example 1 with Example 1, when no polyacrylamide is added to the raw materials, the removal of polyacrylamide from all components has a significant impact on the fixed suspended solids concentration (SS), thus reducing the water treatment effect.

[0082] Comparing Comparative Example 2 with Example 2, when sodium silicate is not added to the raw materials, the removal of sodium silicate from all components has a significant impact on turbidity (NTU), thus reducing the water treatment effect.

[0083] Comparing Comparative Example 3 with Example 3, when potassium chlorate is not added to the raw materials, the removal of potassium chlorate from all components has a significant impact on BOD5, SS, and color, thus reducing the water treatment effect.

[0084] Comparing Comparative Example 4 with Example 4, when polydiallyldimethylammonium chloride and dicyandiamide formaldehyde resin are not added to the raw materials, the removal of polydiallyldimethylammonium chloride and dicyandiamide formaldehyde resin from all components has a significant impact on CODcr value, BOD5, SS and oil content, thus reducing the water treatment effect.

[0085] In summary, the high-difficulty water-resistant and shock-resistant water purifier prepared according to the embodiments of the present invention contains sodium aluminate, sodium silicate, and carboxymethyl cellulose, which have the ability to treat neutral and acidic pollutants; polyaluminum ferric chloride, polyferric sulfate, polydimethyldiallylammonium chloride, and dicyandiamide-formaldehyde resin, which have the ability to treat neutral and alkaline pollutants and remove oil; activated carbon, which has the ability to adsorb and color penetrate; potassium chlorate, which has the ability to sterilize and treat COD; and polyacrylamide, which has the ability to remove turbidity, remove suspended solids, and assist in comprehensive water purification. This high-difficulty water-resistant and shock-resistant water purifier can not only treat the turbidity and suspended solids of high-turbidity water, low-temperature low-turbidity water, dyeing and printing wastewater, and petroleum and petrochemical wastewater, but also make the treated wastewater colorless and odorless, and significantly reduce CODcr, BOD5, SS suspended solids, color value, and bacteria. Furthermore, the use of this water purifier to treat dyeing and printing wastewater does not produce secondary pollution. The preparation process is simple, the cost is low, the product performance is stable, and it is easy to promote.

[0086] Although the invention has been illustrated and described with reference to specific embodiments, it should be understood that many other changes and modifications can be made without departing from the spirit and scope of the invention. Therefore, it is intended that all such changes and modifications falling within the scope of the invention be included in the appended claims.

Claims

1. A high-strength, water-resistant, shock-resistant water purifier, characterized in that, It is mainly made from the following raw materials by mass parts: 12 parts sodium aluminate, 8 parts sodium silicate, 8 parts activated carbon, 9 parts carboxymethyl cellulose, 18 parts polyaluminum ferric chloride, 14 parts polyferric sulfate, 12 parts potassium chlorate, 8 parts polydimethyldiallylammonium chloride, 12 parts dicyandiamide formaldehyde resin, and 4 parts polyacrylamide.

2. A method for preparing a high-difficulty water-resistant and shock-resistant water purification agent as described in claim 1, characterized in that, Includes the following steps: A. Add sodium aluminate, sodium silicate, activated carbon, and carboxymethyl cellulose to the wastewater, stir for the first time, let stand for 20-30 minutes, and take the supernatant. B. Add polyaluminum ferric chloride, polyferric sulfate, and potassium chlorate to the wastewater treated in step A, stir for a second time, let stand for 15-20 minutes, and take the supernatant. C. Add polydimethyldiallylammonium chloride, dicyandiamide-formaldehyde resin, and polyacrylamide to the clear liquid treated in step B, stir for the third time, let stand for 20-30 minutes, filter, and complete the purification of wastewater.

3. The preparation method of the high-difficulty water-resistant and shock-resistant water purification agent according to claim 2, characterized in that, The stirring speed in step A is 100-150 r / min.

4. The preparation method of the high-difficulty water-resistant and shock-resistant water purification agent according to claim 2, characterized in that, The second stirring speed in step B is 80-120 r / min.

5. The preparation method of the high-difficulty water-resistant and shock-resistant water purification agent according to claim 2, characterized in that, The stirring speed in step C for the third time is 80-100 r / min.

6. The preparation method of the high-difficulty water-resistant and shock-resistant water purification agent according to claim 2, characterized in that, The first stirring time in step A is 1.5-3 minutes.

7. The preparation method of the high-difficulty water-resistant and shock-resistant water purification agent according to claim 2, characterized in that, The second stirring time in step B is 5-10 minutes.

8. The preparation method of the high-difficulty water-resistant and shock-resistant water purification agent according to claim 2, characterized in that, The third stirring time in step C is 1-2 minutes.

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