Water purifying preparation and preparation process thereof

Abstract

The invention relates to the technical field of sewage treatment agents, in particular to a water purification preparation and a preparation process thereof.The water purification preparation comprises a water purification carrier, an additive and catalysts, the water purification carrier is a hollow stainless steel bead with through holes in the surface, the catalysts are evenly distributed on the surface of the stainless steel bead and the inner walls of the through holes, and the catalysts are a palladium catalyst and a cocatalyst; the ratio of the palladium catalyst to the cocatalyst is (10-30): (1-5), and the cocatalyst is a transition region variable valence metal ion catalyst or transition metal sulfide. The method can help sewage to complete the steps of iron removal, manganese removal, deodorization, decoloration and organic matter degradation, and due to the degradation of organic matters, the subsequent precipitation and solidification of heavy metals in water become easier and more thorough; meanwhile, the COD (Chemical Oxygen Demand) of the sewage is reduced, the ratio of BOD (Biochemical Oxygen Demand) to COD (Chemical Oxygen Demand) is increased, the biodegradability of water is increased, organic polymer substances are efficiently degraded through catalytic oxidation of a water purifying preparation containing a palladium catalyst, and the pressure and cost of subsequent sewage treatment can be greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment agents, in particular to a water purification agent and a preparation process thereof. Background Art

[0002] In recent years, environmental pollution has become increasingly serious, especially the direct or indirect harm caused by water and drinking water to the human body has been paid more attention by people. Therefore, many methods have been invented to purify water to maintain people's health. Existing water purification methods include filtration, oxidation, precipitation, etc. Although these methods can effectively remove some impurities in drinking water and achieve sensory cleanliness, they cannot remove organic pollutants, mutagens and other impurities in water. Survey data show that there are 12 types of organic matter in natural water bodies: hydrocarbons, phthalools, vinegars, aldehydes and ketones, organic phenol esters, halogenated hydrocarbons, halogenated benzenes, amines, polycyclic aromatic hydrocarbons, heterocyclic compounds and chloramines. Among them, the highest content is phenol, 3-cresol, nitrobenzene, 2-nitrobenzene, 2-nitrotoluene, .3-nitrotoluene, 4-nitrotoluene, isopropylaniline, propylaniline, 2-methylbenzene, 1-methylbenzene, acenaphthene, 4-isopropylphenol and 21 known carcinogens such as fluorene, phenanthrene, anthracene, fluorene, castor and so on. Organic pollutants in water can enter the human body through drinking water or through the food chain and other ways to cause harm. Urban centralized water supply sources are mostly purified by filtration and disinfection.

[0003] The most commonly used method is chlorination disinfection. Chlorination disinfection can kill microorganisms and some organic matter, but it still cannot remove or reduce most organic pollutants, and may even produce chlorination disinfection byproducts, some of which are sore-causing or mutagenic. The problems with sewage treatment technology are: high operating costs, certain limitations in promotion and application, insufficient degradation and treatment of harmful substances, and insufficient solution to the detoxification and deodorization of sewage and the decomposition and removal of organic pollutants. Summary of the invention

[0004] The purpose of the present invention is to provide a water purification preparation and its preparation process, so as to solve the problems mentioned in the above background technology, such as high operating cost of sewage treatment, certain limitations in promotion and application, insufficient degradation and treatment of harmful substances, and failure to fully solve the problems of sewage detoxification, deodorization and decomposition and removal of organic pollutants.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A water purification preparation comprises a water purification carrier, an additive and a catalyst. The water purification carrier is a hollow stainless steel bead with through holes on the surface. The catalyst is evenly distributed on the surface of the stainless steel bead and the inner wall of the through hole. The catalyst is a palladium catalyst and a co-catalyst. The ratio of the palladium catalyst to the co-catalyst is 10-30:1-5. The co-catalyst is a transition zone variable valence metal ion catalyst or a transition metal sulfide.

[0007] Preferably, the additive is a natural biological adhesive, which is a phenolic resin, epoxy resin, polyurethane, or acrylic adhesive.

[0008] Preferably, the diameter of the hollow stainless steel beads is 5-20 mm.

[0009] Preferably, the catalyst thickness distributed on the stainless steel beads and the inner wall of the through hole is 5-50 nm.

[0010] Preferably, the transition zone valence-changing metal ion catalyst is an iron source ion catalyst or a cobalt source ion catalyst.

[0011] Preferably, the iron source ion catalyst includes iron oxyhydroxide, iron oxide, ferrous oxide, and ferrous sulfate.

[0012] Preferably, the cobalt source ion catalyst includes cobalt dichloride, cobalt sulfate, cobalt oxide, and cobalt hydroxide.

[0013] Preferably, the transition metal sulfide is one or a mixture of FeS, NiS, PbS, ZnS, CoS, CuS, and MoCx.

[0014] Preferably, the palladium catalyst is metallic palladium, and the metallic palladium layer is doped with metallic silver, and the proportion of the metallic silver is 0.01%-0.5% of the weight of the metallic palladium.

[0015] On the other hand, the present invention also provides a preparation process of a water purification preparation, which specifically comprises the following steps:

[0016] S10: uniformly mixing the stainless steel powder and the pore-forming agent, wherein the pore-forming agent is K2CO3 or SrSO4;

[0017] S20: placing the obtained mixed powder into a steel ball mold for spark plasma sintering for 10-30 minutes at a temperature of 700-1100° C. to obtain a sintered sphere;

[0018] S30: cooling the obtained sintered sphere to room temperature, and then brewing it with water for 60-120 minutes to completely dissolve or hydrolyze the pore-forming agent, thereby obtaining porous stainless steel beads;

[0019] S40: The catalyst is uniformly attached to the stainless steel surface by chemical deposition, and finally washed with tap water and dried to obtain a water purification preparation containing a palladium catalyst.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the water purification preparation containing palladium catalyst prepared by the water purification preparation and its preparation process can help sewage complete the steps of iron removal, manganese removal, deodorization, decolorization, and degradation of organic matter. Due to the degradation of organic matter, the subsequent precipitation and solidification of heavy metals in water become easier and more thorough; at the same time, the COD of sewage is reduced, and the ratio of BOD to COD is increased, thereby increasing the biodegradability of water.

[0021] (1) The water purification agent of the present invention has low operating costs. According to the sewage flow and environmental indicators, the organic polymer substances can be efficiently degraded by catalytic oxidation of the water purification agent containing palladium catalyst, which can greatly reduce the pressure and cost of subsequent sewage treatment;

[0022] (2) The water purification agent of the present invention can degrade some toxic and harmful substances and decompose complex substances into simple and harmless small molecules. For example, the PVA and COD of papermaking wastewater can be reduced by 100% and 95% respectively;

[0023] (3) The water purification preparation of the present invention effectively removes odor. According to the sewage flow and other environmental indicators, the appropriate amount of ozone and air mixed, the design of a matching catalytic reactor and the guarantee of sewage sealing time can completely eliminate the odor source in the sewage.

[0024] (4) The water purification agent of the present invention effectively decolorizes. Most sewage is dark black or brown in color. After this reaction process, the sewage can basically return to its natural color. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] A water purification preparation comprises a water purification carrier, an additive and a catalyst. The water purification carrier is a hollow stainless steel bead with through holes on the surface. The catalyst is evenly distributed on the surface of the stainless steel bead and the inner wall of the through hole. The catalyst is a palladium catalyst and a co-catalyst. The ratio of the palladium catalyst to the co-catalyst is 10-30:1-5. The co-catalyst is a transition zone variable valence metal ion catalyst or a transition metal sulfide.

[0027] Furthermore, the additive is a natural biological adhesive, which is a phenolic resin, epoxy resin, polyurethane, and acrylic adhesive.

[0028] Specifically, the diameter of the hollow stainless steel bead is 5-20 mm, and the thickness of the catalyst distributed on the stainless steel bead and the inner wall of the through hole is 5-50 nm.

[0029] It is worth noting that the transition zone valence-changing metal ion catalyst is an iron source ion catalyst or a cobalt source ion catalyst. The iron source ion catalyst includes iron oxyhydroxide, iron oxide, ferrous oxide, and ferrous sulfate. The cobalt source ion catalyst includes cobalt dichloride, cobalt sulfate, cobalt oxide, and cobalt hydroxide.

[0030] In addition, the transition metal sulfide is one or a mixture of FeS, NiS, PbS, ZnS, CoS, CuS, and MoCx, the palladium catalyst is metallic palladium, and the metallic palladium layer is doped with metallic silver, and the proportion of metallic silver is 0.01%-0.5% of the weight of the metallic palladium.

[0031] On the other hand, the present invention also provides a preparation process of a water purification preparation, which specifically comprises the following steps:

[0032] S10: Evenly mix the stainless steel powder and the pore-forming agent, wherein the pore-forming agent is K2CO3 or SrSO4;

[0033] S20: placing the obtained mixed powder into a steel ball mold for spark plasma sintering for 10-30 minutes at a temperature of 700-1100° C. to obtain a sintered sphere;

[0034] S30: cooling the obtained sintered sphere to room temperature, and then brewing it with water for 60-120 minutes to completely dissolve or hydrolyze the pore-forming agent, thereby obtaining porous stainless steel beads;

[0035] S40: The catalyst is uniformly attached to the stainless steel surface by chemical deposition, and finally washed with tap water and dried to obtain a water purification preparation containing a palladium catalyst.

[0036] Experimental scene 1

[0037] Take 5 liters of black sewage generated during the processing of a printing factory and put it into containers A and B, 2.5 liters in each container, and conduct a decolorization effect comparison experiment. Put 500g of stainless steel beads with a diameter of 3 mm and containing palladium catalyst in container A; put ordinary stainless steel beads with holes in container B. At the same time, ozone generated by an ozone generator of the same model with a capacity of 20g / hour is mixed with oxygen and passed into the sewage of A and B. 4 liters of oxygen are passed per minute. After being treated by the ozone generator, the ozone content in the oxygen is about 90mg / L. After 30 minutes, the water in container A becomes colorless and transparent, and the water in container B changes from dark black to brown.

[0038] Experimental results: After analyzing the three water samples before and after treatment, the COD of the original black sewage was 1000 mg / L, the COD of the brown water after ozone treatment in container B was 630 mg / L, and the COD of the water after treatment in container A was 55 mg / L.

[0039] Experimental scene 2

[0040] 160 liters of sewage generated during the processing of a papermaking warehouse was taken and placed in purification tank C and purification tank D, with 80 liters in each container, for a decolorization effect comparison experiment. 10 kg of stainless steel beads with a diameter of 20 mm containing palladium catalyst were placed in purification tank C; 10 kg of solid stainless steel beads with a diameter of 20 mm containing palladium catalyst were placed in purification tank D. At the same time, ozone generated by a 20g / hour ozone generator was mixed with oxygen and passed into the sewage of purification tanks C and D, and 10 liters of oxygen was passed per minute. After being treated by the ozone generator, the ozone content in the oxygen was about 90 mg / L. After 2 hours, the water in purification tank C became colorless and transparent, and after 5 hours, the water in purification tank D became colorless and transparent.

[0041] Experimental results: After analyzing the three water samples before and after treatment, the COD of the original sewage was 1200 mg / L, the COD of the sewage treated with ozone in purification tank C was 45 mg / L, and the COD of the water treated in purification tank D was 55 mg / L.

[0042] In the water purification preparation and its preparation process, the sewage is subjected to the action of the water purification preparation containing a palladium catalyst to simultaneously complete the steps of iron removal, manganese removal, deodorization, decolorization, and degradation of organic matter. Due to the degradation of organic matter, the subsequent precipitation and solidification of heavy metals in the water become easier and more thorough; at the same time, the COD of the sewage is reduced, and the ratio of BOD to COD is increased, thereby increasing the biodegradability of the water.

[0043] (1) The water purification agent of the present invention has low operating costs. According to the sewage flow and environmental indicators, the organic polymer substances can be efficiently degraded by catalytic oxidation of the water purification agent containing palladium catalyst, which can greatly reduce the pressure and cost of subsequent sewage treatment;

[0044] (2) The water purification agent of the present invention can degrade some toxic and harmful substances and decompose complex substances into simple and harmless small molecules. For example, the PVA and COD of papermaking wastewater can be reduced by 100% and 95% respectively;

[0045] (3) The water purification preparation of the present invention effectively removes odor. According to the sewage flow and other environmental indicators, the appropriate amount of ozone and air mixed, the design of a matching catalytic reactor and the guarantee of sewage sealing time can completely eliminate the odor source in the sewage.

[0046] (4) The water purification agent of the present invention effectively decolorizes. Most sewage is dark black or brown in color. After this reaction process, the sewage can basically return to its natural color.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A water purification preparation, characterized in that: The invention comprises a water purification carrier, an additive and a catalyst. The water purification carrier is a hollow stainless steel bead with through holes on the surface. The catalyst is evenly distributed on the surface of the stainless steel bead and the inner wall of the through holes. The catalyst is a palladium catalyst and a co-catalyst. The ratio of the palladium catalyst to the co-catalyst is 10-30:1-5. The co-catalyst is a transition zone variable valence metal ion catalyst or a transition metal sulfide.

2. The water purification preparation according to claim 1, characterized in that: The additive adopts natural biological adhesive, and the natural biological adhesive is phenolic resin, epoxy resin, polyurethane, and acrylic ester adhesive.

3. The water purification preparation according to claim 1, characterized in that: The diameter of the hollow stainless steel beads is 5-20 mm.

4. The water purification preparation according to claim 1, characterized in that: The thickness of the catalyst distributed on the stainless steel beads and the inner wall of the through hole is 5-50nm.

5. The water purification preparation according to claim 1, characterized in that: The transition zone valence-changing metal ion catalyst is an iron source ion catalyst or a cobalt source ion catalyst.

6. The water purification preparation according to claim 1, characterized in that: The iron source ion catalyst includes iron oxyhydroxide, iron oxide, ferrous oxide, and ferrous sulfate.

7. The water purification preparation according to claim 1, characterized in that: The cobalt source ion catalyst includes cobalt dichloride, cobalt sulfate, cobalt oxide and cobalt hydroxide.

8. The water purification preparation according to claim 1, characterized in that: The transition metal sulfide is one or a mixture of several of FeS, NiS, PbS, ZnS, CoS, CuS and MoCx.

9. The water purification preparation according to claim 1, characterized in that: The palladium catalyst is metal palladium, and the metal palladium layer is doped with metal silver, and the proportion of the metal silver is 0.01%-0.5% of the weight of the metal palladium.

10. A process for preparing a water purification preparation, comprising the water purification preparation described in any of 1 to 9 above, characterized in that: The specific steps include: S10: uniformly mixing the stainless steel powder and the pore-forming agent, wherein the pore-forming agent is K2CO3 or SrSO4; S20: placing the obtained mixed powder into a steel ball mold for spark plasma sintering for 10-30 minutes at a temperature of 700-1100° C. to obtain a sintered sphere; S30: cooling the obtained sintered sphere to room temperature, and then brewing it with water for 60-120 minutes to completely dissolve or hydrolyze the pore-forming agent, thereby obtaining porous stainless steel beads; S40: The catalyst is uniformly attached to the stainless steel surface by chemical deposition, and finally washed with tap water and dried to obtain a water purification preparation containing a palladium catalyst.