High-efficiency pet odor purification material and preparation method thereof

Abstract

The present application provides a kind of high-efficiency pet odor purification material, including catalytic modification wood charcoal and modified coal charcoal, which can purify volatile malodorous gases such as ammonia, hydrogen sulfide, sulfur dioxide, trimethylamine and methyl mercaptan, etc., which has high adsorption and catalytic neutralization and decomposition capacity, and can simultaneously purify various harmful gases and odors, more comprehensively improve indoor air quality and provide a variety of pet safety, healthy environment. The present application also provides a kind of preparation method of high-efficiency pet odor purification material, which prepares carbon material catalyst by adopting post-forming chemical and physical method, obtains catalytic modification wood charcoal, modifies carbon material by different schemes, obtains multifunctional modified coal charcoal, and then mixes catalytic modification wood charcoal and multifunctional purification modified coal charcoal according to scientific proportion to obtain multifunctional high-efficiency pet odor purification material.

Description

TECHNICAL FIELD

[0002] The application belongs to the technical field of air purification, and particularly relates to a high-efficiency pet odor purification material and a preparation method thereof. BACKGROUND

[0004] Pets play a variety of important roles in human life. The emotional support and companionship provided by pets can alleviate people's stress and loneliness, improve people's mental health, reduce depression and anxiety symptoms, and stimulate people's positive emotions, thereby helping to enhance people's happiness. However, pets themselves can have some environmental impacts, such as pet hair and dander that can cause allergic reactions in humans, and pet odor and excrement that are difficult to remove, which can affect people's health and the harmonious coexistence of people and pets in the living environment.

[0005] Currently, in order to purify the environment, a single air filter (HEPA) and equipment are usually used to absorb and purify particulate matter such as hair, dander, dust, etc. in the air, or ordinary activated carbon is added to the equipment to further purify the ambient air. However, it is difficult to remove volatile organic gases such as ammonia, hydrogen sulfide, sulfur dioxide, trimethylamine, and methyl mercaptan, etc. from pets and their excrement by using only a single high-efficiency air filter and ordinary activated carbon. These gases are all irritating and foul-smelling gases. SUMMARY

[0007] The purpose of the present application is to provide a high-efficiency pet odor purification material to solve the problem that volatile organic gases such as ammonia, hydrogen sulfide, sulfur dioxide, trimethylamine, and methyl mercaptan, etc. are difficult to remove from pets and their excrement.

[0008] Another purpose of the present application is to provide a preparation method of a high-efficiency pet odor purification material.

[0009] A high-efficiency pet odor purification material includes, by weight percentage, 30-70% catalytically modified wood charcoal and 30-70% modified coal charcoal.

[0010] The raw materials of the catalytically modified wood charcoal include 150-160 g of wood powder charcoal, 30-40 g of adhesive, and 40-80 g of nano-oxide.

[0011] The raw materials of the modified coal charcoal include 150-160 g of coal columnar charcoal, 22-24 g of modifier, and 97-105 g of distilled water.

[0012] The high-efficiency pet odor purification material as described above, the wood powder charcoal is a wood powder active carbon produced by phosphoric acid method, with CTC value ≥ 140%, iodine adsorption value ≥ 1400 mg / L, fineness 325 mesh ≥ 90%, pH value ≥ 3, moisture ≤ 5%, ash content ≤ 5%, iron salt ≤ 300 PPM. The wood powder charcoal produced by chemical method has developed mesoporous structure and high specific surface area, which can provide more adsorption sites; has high CTC value and iodine adsorption value, good gas adsorption performance, high adsorption capacity and fast filtration speed for pet odor and organic gas; has high fineness and pH value, which can increase the specific surface area and adsorption activity of wood powder charcoal; has low water content, which can reduce the negative impact on adsorption performance; has high purity, low ash content and iron salt content, which can reduce the interference on adsorption performance and improve the treatment rate of waste gas.

[0013] The high-efficiency pet odor purification material as described above, the coal columnar charcoal is a coal columnar active carbon with CTC value ≥ 90% and iodine adsorption value ≥ 1200 mg / L. The coal columnar charcoal has high mechanical strength, developed microporous structure and high specific surface area, high CTC value and iodine adsorption value, good gas adsorption performance and high adsorption capacity, strong adsorption ability for pet odor and organic gas, and good chemical stability, which can maintain stable adsorption performance in a wide pH range.

[0014] The high-efficiency pet odor purification material as described above, the nano oxide is one or more combinations of nano manganese oxide, nano copper oxide and nano silver oxide. The nano oxide has high specific surface area and rich surface active sites, good oxidation-reduction capacity and catalytic capacity, which can cause adsorption, catalysis or oxidation reaction with odor substances; also has good antibacterial performance, which can inhibit and kill microorganisms. Secondly, the nano oxide is loaded in the pore structure of the wood powder charcoal, which increases the function of adsorbing and catalytically decomposing organic gas, thereby improving the purification efficiency and service life of the purification material.

[0015] The high-efficiency pet odor purification material as described above, wherein the modifier is one or more of hydrogen peroxide, citric acid, acetic acid, sodium hydroxide, and nitric acid in combination. The modifier includes an acidic modifier, an alkaline modifier, and a composite oxidation modifier, which are used to modify the coal columnar carbon, so as to improve the adsorption and decomposition performance of the coal columnar carbon, and improve the overall purification effect of the purification material on pet odor. The modifier can enhance the surface functional groups of the coal columnar carbon, so that effective chemical decomposition is performed when the coal columnar carbon is in contact with different organic gases, more functions are provided for purifying the organic gases, and the purification range of the activated carbon is strengthened; the modifier can react with harmful gases to neutralize and decompose, improve the surface chemical properties of the coal columnar carbon, improve the purification efficiency of the activated carbon, prolong the service life of the activated carbon, reduce the consumption cost of consumers, and reduce the secondary pollution of the environment.

[0016] A preparation method of the high-efficiency pet odor purification material, including the following steps:

[0017] (1) Preparation of catalytically modified wood carbon:

[0018] a1, preparation: prepare the raw materials of the catalytically modified wood carbon according to the weight ratio, and reserve;

[0019] a2, preparation of adhesive: add the adhesive into water according to the preparation ratio, and stir uniformly, and reserve; by adjusting the preparation ratio of the adhesive, the micropore distribution of the wood powder carbon can be optimized, so as to reduce the blocked pore structure, so that the wood powder carbon has more developed pore structure and better bonding strength, so that the wood powder carbon and the nano oxide can be uniformly mixed and kept stable.

[0020] a3, mixing: add the adhesive prepared in step a2 into the reaction container, add the nano oxide, stir for 10 min, after the adhesive and the nano oxide are completely and uniformly mixed, add the wood powder carbon, stir quickly while adding, after the wood powder carbon is completely added, pour the mixture into a kneader for forced kneading and stirring for 10 min; during the mixing, the nano oxide can be uniformly distributed in the wood powder carbon, and by controlling the stirring speed and time, the uniformity and stability of the catalytically modified wood carbon can be improved.

[0021] a4, granulation molding: send the uniformly stirred mixture of step a3 into a granulation equipment for granulation to obtain columnar granular carbon, after the columnar granular carbon is naturally dried for 2 h, the columnar granular carbon is baked to a water content of ≤10%; by baking treatment, the water in the mixture can be removed, and the adsorption performance of the granular carbon is further enhanced.

[0022] a5, high-temperature calcination: the columnar granular carbon described in step a4 is placed in a heating device for catalytic calcination, and after the calcination is completed, the material is discharged when the temperature of the heating device drops to ≤40℃; through high-temperature calcination and secondary activation, by controlling the corresponding conditions, the pore structure and effective pore size and volume of the columnar granular carbon can be improved, the activity of the nano-oxidized material can be activated, the compressive strength and wear resistance of the columnar granular carbon can be increased, and the thermal stability and catalytic decomposition capacity can be improved.

[0023] a6, sieving: after the columnar granular carbon described in step a5 is cooled, it is sieved to obtain a catalytically modified wood carbon, which is ready for use;

[0024] (2) Preparation of modified coal-based carbon:

[0025] b1, preparation of raw materials: prepare the raw materials for the modified coal-based carbon according to the weight ratio, and reserve them for use;

[0026] b2, mixing: add distilled water to a reaction container, add a modifier, stir for 5 min to obtain a modification liquid, quickly add coal-based columnar carbon to the modification liquid, quickly stir for 5 min, and after the modification liquid is completely consumed, stand for 15 min. After standing is completed, stir for 2 min, then take out the mixture and dry it for 2 h. After the surface of the mixture is dried, the mixture is baked to a moisture content of ≤5%, to obtain modified coal-based carbon 1, which is ready for use;

[0027] Preferably, the modifier is citric acid and nitric acid. Citric acid and nitric acid can react with the functional groups on the surface of the coal-based columnar carbon, introduce new functional groups or change the properties of the original functional groups, thereby changing the surface chemical properties and enhancing the adsorption capacity of the coal-based columnar carbon for specific substances.

[0028] b3, mixing: add distilled water to a reaction container, add a modifier, quickly stir for 5 min until there are no fine particles or precipitates in the solution, to obtain a modification liquid, quickly add coal-based columnar carbon to the modification liquid while stirring, and after the modification liquid is completely consumed, stand for 15 min. After standing is completed, stir for 2 min, then take out the mixture and dry it for 2 h. After the surface of the mixture is dried, the mixture is baked to a moisture content of ≤5%, to obtain modified coal-based carbon 2, which is ready for use;

[0029] Preferably, when the modifier is sodium hydroxide, sodium hydroxide can react with the coal-based columnar carbon to introduce or remove specific functional groups, change the surface chemical properties, and enhance the adsorption capacity of the coal-based columnar carbon for target substances, thereby improving the selectivity and efficiency in the purification process.

[0030] (3) mixing component: mixing the catalytically modified wood charcoal in step a5, the modified coal charcoal 1 in step b2 and the modified coal charcoal 2 in step b3 uniformly, sieving, and obtaining the high-efficiency pet odor purification material. The catalytically modified wood charcoal and the modified coal charcoal obtained by different preparation methods have different pore structures and surface chemical properties, and the two can produce a synergistic effect after being mixed, thereby improving the adsorption and purification capacity for pet odor.

[0031] The high-efficiency pet odor purification material preparation method as described above, wherein the weight percentage of the catalytically modified wood charcoal is 30-70%, and the sum of the weight percentages of the modified coal charcoal 1 and the modified coal charcoal 2 is 30-70% when the mixing component is mixed.

[0032] The high-efficiency pet odor purification material preparation method as described above, wherein in step a5, the granular charcoal in step a4 is placed in a heating device for 30 min and then steam is added; the pressure of the steam is 0.2 MPa; and the flow rate of the steam is 20-50 m 3 / h.

[0033] The high-efficiency pet odor purification material preparation method as described above, wherein when the catalytic calcination in step a5 is performed, the rotation speed of the rotary furnace is 3-5 r / min, the temperature of the rotary furnace is 550-700 DEG C, and the catalytic calcination lasts for 4-5 h.

[0034] The high-efficiency pet odor purification material preparation method as described above, wherein the baking temperature in steps a4, b2 and b3 is 100-150 DEG C, and the baking time is 3-4 h; and the mesh size of the sieve used in steps a6 and the mixing component process is 12.

[0035] The present application provides a high-efficiency pet odor purification material, which comprises catalytically modified wood charcoal and modified coal charcoal. First, the wood powder charcoal is modified by using a binder and nano-oxide. The binder is used to expand the micropore distribution of the wood powder charcoal, reduce the blocked pore structure, and make the wood powder charcoal have more developed pore structure and better bonding strength. The binder can uniformly distribute the nano-oxide in the internal and external structure of the wood powder charcoal. The nano-oxide is used to further improve the pore structure of the wood powder charcoal, increase the number of adsorption sites, and have good inhibition and killing effect on microorganisms through adsorption, catalysis or oxidation reaction with odor gas. Second, the coal columnar charcoal is modified by using a modifier. The surface chemical properties of the coal columnar charcoal are improved by selectively using an acidic modifier, an alkaline modifier or a composite oxidation modifier, so as to increase the chemical decomposition function of purifying different organic gases, provide more solutions for purifying various organic gases, improve the service life and chemical mechanism of the activated carbon, and reduce the secondary pollution of the environment.

[0036] The application further provides a preparation method of the purification material for efficiently purifying pet odor, which is simple, and the carbon material catalyst is prepared by using a post-forming, pre-chemical, post-physical method, the catalytically modified wood charcoal is obtained, the carbon material is modified by using different schemes, the multifunctional modified coal charcoal is obtained, the catalytically modified wood charcoal and the multifunctional modified coal charcoal are mixed according to a scientific ratio, and the purification material for efficiently purifying pet odor is obtained, which can effectively purify and remove volatile harmful gases such as ammonia, hydrogen sulfide, sulfur dioxide, trimethylamine and methyl mercaptan, has high purification and decomposition neutralization capacity, can simultaneously purify and remove multiple volatile harmful gases, and more comprehensively improves air quality.

DETAILED DESCRIPTION

[0038] The specific technical solutions of the application are described below in combination with examples 1-3:

[0039] Example 1:

[0040] A preparation method of the purification material for efficiently purifying pet odor, comprising the following steps:

[0041] (1) Preparation of catalytically modified wood charcoal:

[0042] a1, preparation of raw materials: prepare the raw materials of the catalytically modified wood charcoal according to table 2, and reserve;

[0043] a2, preparation of adhesive: add the adhesive into water according to the preparation ratio, stir uniformly, and reserve;

[0044] a3, mixing: add the adhesive prepared in step a2 into a reaction container, add nano oxide, stir for 10 min, after the adhesive and nano oxide are completely and uniformly mixed, add wood powder charcoal, stir quickly while adding, after the wood powder charcoal is completely added, pour the mixture into a kneader for forced kneading and stirring for 10 min;

[0045] a4, granulation molding: send the uniformly stirred mixture in step a3 into a granulation equipment for granulation, to obtain granular charcoal, after the granular charcoal is naturally dried for 2 h, bake the granular charcoal at 100℃ for 3 h until the moisture content is ≤10%;

[0046] a5, high-temperature calcination: put the granular charcoal in step a4 into a heating equipment with a rotation speed of 3 r / min and a temperature of 550℃ for 4 h of catalytic calcination, after the granular charcoal is put into the heating equipment for 30 min, add steam with a pressure of 0.2mpa and a flow rate of 25m 3 / h, after the calcination is completed, take out the material when the temperature of the heating equipment drops to ≤40℃;

[0047] a6, sieving: after the granular charcoal in step a5 is cooled, use a sieve basin with a specification of 12 mesh for sieving, to obtain catalytically modified wood charcoal, and reserve;

[0048] (2) Preparation of modified coal quality carbon:

[0049] b1, Preparation: Prepare the raw materials of modified coal quality carbon according to Table 3, and reserve;

[0050] b2, Mixing: Add distilled water to the reaction container, add the modifier, stir for 5 min, obtain the modification liquid, quickly add the coal quality columnar carbon to the modification liquid, quickly stir for 5 min, after the modification liquid is completely consumed, stand for 15 min, after standing is completed, take out the mixture after stirring for 2 min and dry it for 2 h, after the surface of the mixture is dried, bake the mixture at 100°C for 3 h until the moisture content is ≤5%, obtain the modified coal quality carbon 1, and reserve;

[0051] b3, Mixing: Add distilled water to the reaction container, add the modifier, quickly stir for 5 min until there are no fine particles or precipitates in the solution, obtain the modification liquid, quickly add the coal quality columnar carbon to the modification liquid while stirring, after the modification liquid is completely consumed, stand for 15 min, after standing is completed, take out the mixture after stirring for 2 min and dry it for 2 h, after the surface of the mixture is dried, bake the mixture at 100°C for 3 h until the moisture content is ≤5%, obtain the modified coal quality carbon 2, and reserve;

[0052] (3) Mixing components: Mix the catalytically modified wood carbon with a weight percentage of 52% in step a5 and the modified coal quality carbon 1 and the modified coal quality carbon 2 with a total weight percentage of 58% in step b2 uniformly, sieve using a sieve basin with a specification of 12 meshes, and obtain the high-efficiency pet odor purification material.

[0053] Example 2:

[0054] A method for preparing the high-efficiency pet odor purification material, comprising the following steps:

[0055] (1) Preparation of catalytically modified wood carbon:

[0056] a1, Preparation: Prepare the raw materials of catalytically modified wood carbon according to Table 2, and reserve;

[0057] a2, Preparation of adhesive: Add the adhesive to water according to the preparation ratio and stir uniformly, and reserve;

[0058] a3, Mixing: Add the adhesive prepared in step a2 to the reaction container, add the nano oxide, stir for 10 min, after the adhesive and the nano oxide are completely and uniformly mixed, add the wood powder carbon while quickly stirring, after the wood powder carbon is completely added, pour the mixture into a kneader for forced kneading and stirring for 10 min;

[0059] a4, granulation molding: the mixture stirred uniformly in step a3 is sent into a granulation device for granulation to obtain granular carbon, after the granular carbon is naturally dried for 2h, the granular carbon is baked at 150℃ for 3h until the moisture content is ≤10%;

[0060] a5, high-temperature calcination: the granular carbon in step a4 is put into a heating device at 4r / min and 650℃ for 4.5h of catalytic calcination, 0.2mpa and 40m 3 / h of steam are added after the granular carbon is put into the heating device for 30min, and the product is discharged when the temperature of the heating device drops to ≤40℃;

[0061] a6, sieving: after the granular carbon in step a5 is cooled, sieving is performed using a sieve basin with a specification of 12 mesh to obtain catalytically modified wooden carbon, which is ready for use;

[0062] (2) Preparation of modified coal-based carbon:

[0063] b1, preparation of raw materials: prepare the raw materials for modified coal-based carbon according to Table 3, which is ready for use;

[0064] b2, mixing: distilled water is added to a reaction container, a modifier is added, and stirring is performed for 5min to obtain a modification liquid, coal-based columnar carbon is quickly added to the modification liquid, and rapid stirring is performed for 5min, after the modification liquid is completely consumed, standing is performed for 15min, after standing is completed, stirring is performed for 2min, and then the mixture is taken out and dried for 2h, after the surface of the mixture is dried, the mixture is baked at 150℃ for 3h until the moisture content is ≤5%, to obtain modified coal-based carbon 1, which is ready for use;

[0065] b3, mixing: distilled water is added to a reaction container, a modifier is added, and rapid stirring is performed for 5min until there are no fine particles or precipitates in the solution, to obtain a modification liquid, coal-based columnar carbon is quickly added to the modification liquid while stirring, and after the modification liquid is completely consumed, standing is performed for 15min, after standing is completed, stirring is performed for 2min, and then the mixture is taken out and dried for 2h, after the surface of the mixture is dried, the mixture is baked at 150℃ for 3h until the moisture content is ≤5%, to obtain modified coal-based carbon 2, which is ready for use;

[0066] (3) mixing components: 30wt% of the catalytically modified wooden carbon in step a5 and 70wt% of the sum of the modified coal-based carbon 1 and the modified coal-based carbon 2 in step b2 are uniformly mixed, sieving is performed using a sieve basin with a specification of 12 mesh to obtain a high-efficiency pet odor purification material.

[0067] Example 3:

[0068] A method for preparing the high-efficiency pet odor purification material, comprising the following steps:

[0069] (1) Preparation of catalytically modified wood charcoal:

[0070] a1, Preparation: Prepare the raw materials for catalytically modified wood charcoal according to Table 2, and reserve;

[0071] a2, Preparation of adhesive: Add the adhesive to water according to the preparation ratio and stir until uniform, and reserve;

[0072] a3, Mixing: Add the adhesive prepared in step a2 to the reaction container, add nano oxide, stir for 10 min, and after the adhesive and nano oxide are completely uniform, add wood powder charcoal, stir quickly while adding, and after the wood powder charcoal is completely added, pour the mixture into a kneader for forced kneading and stirring for 10 min;

[0073] a4, Granulation and molding: Send the uniformly stirred mixture of step a3 to a granulation device for granulation to obtain granular charcoal, and after the granular charcoal is naturally dried for 2 h, bake the granular charcoal at 120°C for 4 h to a moisture content of ≤10%;

[0074] a5, High-temperature calcination: Put the granular charcoal of step a4 into a heating device at 5 revolutions / min and 700°C for 5 h of catalytic calcination, and after the granular charcoal is put into the heating device for 30 min, add steam at 0.2 mpa and 50 m 3 / h, and after calcination, when the temperature of the heating device drops to ≤40°C, discharge;

[0075] a6, Sieving: After the granular charcoal of step a5 is cooled, sieve it using a sieve basin with a specification of 12 mesh to obtain catalytically modified wood charcoal, and reserve;

[0076] (2) Preparation of modified coal charcoal:

[0077] b1, Preparation: Prepare the raw materials for modified coal charcoal according to Table 3, and reserve;

[0078] b2, Mixing: Add distilled water to a reaction container, add a modifier, stir for 5 min to obtain a modification liquid, quickly add coal columnar charcoal to the modification liquid, quickly stir for 5 min, after the modification liquid is completely consumed, stand for 15 min, after standing, stir for 2 min, take out the mixture and dry it for 2 h, after the surface of the mixture is dried, bake the mixture at 120°C for 4 h to a moisture content of ≤5% to obtain modified coal charcoal 1, and reserve;

[0079] b3, mixing: distilled water was added to a reaction vessel, a modifier was added, and rapid stirring was performed for 5 min until the solution was free of fine particles or precipitates, to obtain a modification liquid, and coal columnar carbon was rapidly added to the modification liquid while stirring for 5 min, and after the modification liquid was completely consumed, it was left to stand for 15 min, after which the mixture was stirred for 2 min and then removed and allowed to dry for 2 h, and after the surface of the mixture was dried, the mixture was baked at 120°C for 4 h until the moisture content was ≤5%, to obtain modified coal columnar carbon 2, which was used as needed;

[0080] (3) mixing components: 63% by weight of the catalytically modified wood carbon of step a5 and 37% by weight of the modified coal columnar carbon 1 and the modified coal columnar carbon 2 of step b2 were mixed uniformly, sieved using a sieve with a mesh size of 12, to obtain a high-efficiency pet odor purification material.

[0081] Table 1 weight percentage of components of high-efficiency pet odor purification materials of examples 1-3

[0082]

[0083] Table 2 component ratio of catalytically modified wood carbon of examples 1-3

[0084]

[0085] Table 3 component ratio of modified coal columnar carbon of examples 1-3

[0086]

[0087] 400 g of the high-efficiency pet odor purification material prepared from examples 1-3 was made into an air filter core carbon plate, and a HEPA of the same specification was installed at the front end of the air filter core carbon plate to prepare a double-effect filter, and the double-effect filter was placed in an air purifier for testing.

[0088] Comparative example 1 differs from examples 1-3 in that the air filter core carbon plate was made of 400 g of ordinary activated carbon.

[0089] Examples 1-3 and comparative example 1 were tested according to the national standard GB / T 18801-2022, and the test data are shown in Table 4.

[0090] Table 4 test data of examples 1-3 and comparative example 1

[0091]

[0092] As shown in Table 4, when the action time is 60 minutes, the concentrations of ammonia, sulfur dioxide, methyl mercaptan, trimethylamine, acetic acid and hydrogen sulfide in Examples 1-3 are all significantly reduced, and the natural attenuation rates are all greater than 90%, compared with Comparative Example 1, Examples 1-3 have excellent purification effect, and the various pollution gases can be more quickly degraded, diluted, volatilized or fixed.

[0093] The high-efficiency pet odor purification material of the present application comprises catalytic modified wood charcoal and modified coal charcoal, can simultaneously adsorb various harmful substances with different chemical and physical properties, has more types of adsorbed harmful substances and larger adsorption capacity, can quickly kill microorganisms and bacteria in the air, can more comprehensively improve air quality, and can be widely applied to pet breeding industry, pet market and pet feeding family, etc.

[0094] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pet odor purifying material, characterized in that: 30-70% catalytically modified wood charcoal, 30-70% modified coal charcoal by weight percentage; The raw material of the catalytically modified wood charcoal comprises wood powder charcoal 150-160 g, adhesive 30-40 g, and nano-oxide 40-80 g; The raw material of the modified coal charcoal comprises coal columnar charcoal 150-160 g, modifier 22-24 g, and distilled water 97-105 g; The nano-oxide is one or more combinations of nano-manganese oxide, nano-copper oxide, and nano-silver oxide; The preparation method of the pet odor purification material comprises the following steps: (1) Preparation of catalytically modified wood charcoal: a1, preparation: prepare the raw material of the catalytically modified wood charcoal according to the weight ratio, and reserve; a2, preparation of adhesive: add the adhesive into water according to the preparation ratio, stir uniformly, and reserve; a3, mixing: add the adhesive prepared in step a2 into a reaction container, add nano-oxide, stir for 10 min, and then add wood powder charcoal while stirring quickly after the adhesive and nano-oxide are completely and uniformly mixed, pour the mixture into a kneader for forced kneading and stirring for 10 min; a4, granulation and molding: send the uniformly stirred mixture in step a3 into a granulation device for granulation to obtain columnar granular charcoal, and then naturally air dry the columnar granular charcoal for 2 h, and bake the columnar granular charcoal to a water content of ≤10%; a5. High-temperature calcination: the columnar granular carbon described in step a4 is placed in a heating device for catalytic calcination, steam is added after the columnar granular carbon is placed in the heating device for 30 min, the pressure of the steam is 0.2 MPa, the flow rate of the steam is 20-50 m 3 / h, and the material is discharged when the temperature of the heating device drops to ≤40°C. a6, sieving: after the columnar granular charcoal in step a5 is cooled, sieve it to obtain catalytically modified wood charcoal, and reserve; (2) Preparation of modified coal charcoal: b1, preparation: prepare the raw material of the modified coal charcoal according to the weight ratio, and reserve; b2, mixing: add distilled water into a reaction container, add citric acid and nitric acid or acetic acid and nitric acid, stir for 5 min to obtain a modification liquid, quickly add coal columnar charcoal into the modification liquid, quickly stir for 5 min, stand for 15 min after the modification liquid is completely consumed, stir for 2 min, take out the mixture, and air dry it for 2 h, bake the mixture to a water content of ≤5% after the surface of the mixture is dried to obtain modified coal charcoal 1, and reserve; b3, mixing: add distilled water into a reaction container, add sodium hydroxide, quickly stir for 5 min until there is no fine particle or precipitate in the solution to obtain a modification liquid, quickly add coal columnar charcoal into the modification liquid while stirring, stir for 5 min, stand for 15 min after the modification liquid is completely consumed, stir for 2 min after standing is completed, take out the mixture, and air dry it for 2 h, bake the mixture to a water content of ≤5% after the surface of the mixture is dried to obtain modified coal charcoal 2, and reserve; (3) Mixing components: mix the catalytically modified wood charcoal in step a6, the modified coal charcoal 1 in step b2, and the modified coal charcoal 2 in step b3 uniformly, sieve them, and obtain a pet odor purification material.

2. The pet odor eliminating material according to claim 1, wherein: The wood powder charcoal is a wood powder active carbon produced by phosphoric acid method, with CTC value ≥ 140%, iodine adsorption value ≥ 1400 mg / L, fineness 325 mesh ≥ 90%, PH value ≥ 3, moisture ≤ 5%, ash content ≤ 5%, and iron salt ≤ 300 PPM.

3. The pet odor eliminating material according to claim 1, wherein: The coal columnar charcoal is a coal columnar active carbon with CTC value ≥ 90% and iodine adsorption value ≥ 1200 mg / L.

4. The pet odor eliminating material according to claim 1, wherein: When the components are mixed, the weight percentage of the catalytically modified wood charcoal is 30-70%, and the sum of the weight percentages of the modified coal charcoal 1 and the modified coal charcoal 2 is 30-70%.

5. The pet odor eliminating material according to claim 1, wherein: When the catalytic calcination of step a5 is performed, the rotary furnace rotation speed is 3-5 revolutions per minute, the rotary furnace temperature is 550-700 DEG C, and the catalytic calcination time is 4-5 hours.

6. The pet odor elimination material according to claim 1, wherein: The baking temperature in the baking of step a4, step b2 and step b3 is 100-150 DEG C, and the baking time is 3-4 hours; in the mixing process of step a6 and step b4, the sieve plate specification used is 12 mesh.

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