CN111348755A - Sewage treatment agent for printing and dyeing textile industry and preparation method thereof - Google Patents
Sewage treatment agent for printing and dyeing textile industry and preparation method thereof Download PDFInfo
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- CN111348755A CN111348755A CN202010259781.1A CN202010259781A CN111348755A CN 111348755 A CN111348755 A CN 111348755A CN 202010259781 A CN202010259781 A CN 202010259781A CN 111348755 A CN111348755 A CN 111348755A
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Abstract
The invention discloses a sewage treatment agent for printing and dyeing textile industry and a preparation method thereof, wherein the sewage treatment agent is prepared from the following raw materials in parts by weight: 30-40 parts of coconut shell activated carbon/chitosan compound, 5-10 parts of polyaluminium chloride, 1-5 parts of nickel nitrate, 5-10 parts of aerogel silica gel, 3-5 parts of polyferric sulfate, 5-8 parts of polyacrylamide, 5-10 parts of nitrobacteria and 5-10 parts of mixing auxiliary agent; the sewage treatment agent has good effect of treating printing and dyeing textile sewage, the treated sewage reaches the national emission standard, can be recycled, saves water resources, and is an efficient sewage treatment agent; the invention also provides a spiral feeder which comprises a feeding mixing chamber, a driving device, a spiral reaction chamber and a storage device, and the spiral feeder is simple in structure, and has practicability because all raw materials are mixed step by step according to reaction conditions in the preparation process of the semi-finished treatment agent.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment agent for printing and dyeing textile industry and a preparation method thereof.
Background
The textile printing and dyeing industry is an industrial sewage drainage house, sewage mainly contains dirt, grease, salts on textile fibers and various sizing agents, dyes, surfactants, auxiliaries, acid and alkali and the like added in the processing process, the sewage for the printing and dyeing textile industry is characterized by high organic matter concentration, complex components, deep and variable chromaticity, large pH change and large water quantity and water quality change, belongs to industrial waste water which is difficult to treat, along with the development of chemical fiber fabrics, the dyeing and dyeing textile sewage is high in chromaticity and COD (chemical oxygen demand), particularly the dyeing and dyeing processes of mercerized blue, mercerized black, extra-deep blue, extra-deep black and the like, the dyeing and dyeing uses sulfur dyes, printing and dyeing auxiliaries, sodium sulfide and the like in large quantity, so that the waste water contains a large amount of sulfides, and the sewage needs to be subjected to chemical dosing pretreatment and then subjected to series treatment to be stably.
The existing treatment methods for treating printing and dyeing sewage mainly comprise a biological method, an electrolytic method, a chemical method and a photocatalytic method, wherein the chemical treatment method is to treat pollutants by using added chemical reagents, including reactions such as neutralization, flocculation, oxidation reduction and the like, the method is used for treating the sewage more thoroughly, the treated sewage can reach the discharge standard, and the sewage treatment agent is the main raw material of the chemical treatment method.
When the existing dyeing and printing textile sewage treatment agent is used for treating sewage, bleaching and dyeing wastewater contains auxiliaries such as dye, slurry and surfactant, the wastewater is large in water volume and low in concentration and chromaticity, if physicochemical treatment is simply adopted, effluent is also 100-200 mg/l, chromaticity can meet the discharge requirement, but the pollution amount is greatly increased, the sewage treatment cost is high, and secondary pollution is easily caused.
Disclosure of Invention
The invention aims to provide a sewage treatment agent for printing and dyeing textile industry and a preparation method thereof, wherein the sewage treatment agent greatly reduces the chroma of sewage by combining chemical reaction and biological reaction, does not increase pollution amount, reduces the manufacturing cost and has better practicability; the invention also provides a spiral feeder,
the technical problems to be solved by the invention are as follows:
1. when the existing dyeing and printing textile sewage treatment agent is used for treating sewage, bleaching and dyeing wastewater contains auxiliaries such as dye, slurry and surfactant, the wastewater has large water volume and low concentration and chromaticity, if the existing dyeing and printing textile sewage treatment agent is used for treating sewage, the chromaticity can meet the discharge requirement, but the pollution amount is greatly increased, and secondary pollution is easily caused.
2. The sewage treatment agent for the printing and dyeing textile industry produced by the prior art has higher treatment cost and needs to improve the treatment effect.
The purpose of the invention can be realized by the following technical scheme:
a sewage treatment agent for printing and dyeing textile industry is prepared from the following raw materials in parts by weight: 30-40 parts of coconut shell activated carbon/chitosan compound, 5-10 parts of polyaluminium chloride, 1-5 parts of nickel nitrate, 5-10 parts of aerogel silica gel, 3-5 parts of polyferric sulfate, 5-8 parts of polyacrylamide, 5-10 parts of nitrobacteria and 5-10 parts of mixing auxiliary agent;
wherein, the coconut shell activated carbon/chitosan compound is prepared by the following steps:
s1, taking 20-30 parts of chitosan and 10-20 parts of coconut shell activated carbon in parts by weight, crushing the chitosan and 10-100 meshes of coconut shell activated carbon in a crusher for standby, putting the crushed chitosan into a 250ml three-neck flask, dropwise adding 10-15 parts of acetic acid into the three-neck flask, heating to 80-85 ℃ and keeping the temperature for 10-15min to dissolve the chitosan in the acetic acid, then adding 3-5 parts of sodium hydroxide and 5-8 parts of hydrochloric acid into the three-neck flask, and stirring for 10-15min to obtain a chitosan aqueous solution;
s2, putting the chitosan aqueous solution into a reaction kettle, adding 5-10 parts of coconut shell activated carbon into the reaction kettle, mixing and stirring at 85-90 ℃ for 20-30min, adding 3-5 parts of sodium acetate into the reaction kettle to prepare a slightly acidic solution environment, and continuously mixing and stirring for reaction for 15-20min to obtain a pretreatment solution;
s3, adding the pretreatment solution into a heating stirrer, adding 5-10 parts of sodium alginate and 5-10 parts of gypsum powder into the heating stirrer, setting the rotation speed at 300-35 min, the stirring time at 140-150 ℃, and mixing and reacting the materials to obtain a pre-composite;
s4, placing the pre-composite into a mixer, adding 5-10 parts of plant fiber for melt mixing, setting the rotation speed at 250-185 ℃ and the mixing temperature at 170-185 ℃, and cutting and granulating by a granulator after mixing for 20-30min to obtain the short-rod-shaped coconut shell activated carbon/chitosan composite.
A preparation method of a sewage treatment agent for printing and dyeing textile industry comprises the following steps:
respectively crushing the coconut shell activated carbon/chitosan compound, polyaluminium chloride, nickel nitrate, aerogel silica gel, polyferric sulfate, polyacrylamide and a mixing auxiliary agent in a crusher until the particle size is 80-100 meshes for later use, putting the coconut shell activated carbon/chitosan compound into a reaction kettle, adding the polyaluminium chloride and the nickel nitrate, mixing and stirring for 30-40min at the temperature of 150-;
step two, putting the preliminary mixed material into an ultrasonic oscillator, adding polymeric ferric sulfate and polyacrylamide, and performing ultrasonic oscillation for 10-15min at the temperature of 160-170 ℃ to obtain a pretreating agent;
adding the pretreating agent, the aerogel silica gel and the mixed auxiliary agent into a spiral feeder, and preparing a semi-finished product treating agent by the spiral feeder;
and step four, putting the semi-finished product treating agent into a stirrer, adding nitrobacteria into the stirrer, setting the rotating speed at 300-350r/min and the temperature at 70-75 ℃, mixing and stirring for 10-15min, and grinding after freeze drying for 2h to obtain the dyeing textile sewage treating agent with the particle size of 300-350 meshes.
As a further scheme of the invention, the mixing auxiliary agent is kaolin, the concentration of the hydrochloric acid is 0.1-0.2mol/L, and the specific surface area of the coconut shell activated carbon is 2300-2350m2The pore size distribution is 60-80 μm.
As a further scheme of the invention, the invention also provides a spiral feeder, which comprises a feeding mixing chamber, a driving device, a spiral reaction chamber and a material storage device;
the feeding and mixing chamber comprises a first shell, a first feeding port, a first stirring rod, a first bearing, a second bearing, a first discharging port and a first gear; the first feeding port is arranged at the top of the first shell, the first discharging port is arranged at the bottom of the first shell, the first bearing is embedded through the left side wall of the first shell, the left end of the first stirring rod is rotatably connected with the left side wall of the first shell through the first bearing, the inner ring of the first bearing is fixedly connected with the first stirring rod, and the outer ring of the first bearing is fixedly connected with the left side wall of the first shell; the second bearing is embedded into the right side wall of the first shell, the right end of the first stirring rod is rotatably connected with the right side wall of the first shell through the second bearing, the outer ring of the second bearing is fixedly connected with the right side wall of the first shell, and the inner ring of the second bearing is fixedly connected with the other end of the first stirring rod; the first gear is fixedly sleeved on a first stirring rod on the left side of the first bearing, rhombic stirring blades are uniformly arranged on the side wall of the first stirring rod, and a supporting seat is arranged at the bottom of the first shell;
the driving device comprises a motor fixing seat, a first motor, a second gear and a gear protection shell, wherein the motor fixing seat is arranged on the outer side wall of the first shell and is flush with the bottom of the first shell;
the spiral reaction chamber comprises a second shell, a second charging hole, a second stirring rod, an electric heating sleeve, a third bearing, a vertical plate, a fourth bearing and a second motor, wherein the left end wall of the second shell is fixedly connected with the right end wall of the first shell, the second shell is of a horizontal cylinder structure, the second charging hole is formed in the outer side wall of the second shell, the electric heating sleeve is arranged on the inner side wall of the second shell, the second motor is arranged on the outer side of the right end wall of the second shell, and an output shaft of the second motor is fixedly connected with the second stirring rod; the left end of the second stirring rod is rotatably connected with the left end wall of the second shell through a third bearing, the third bearing is embedded into the left end wall of the second shell, the outer ring of the third bearing is fixedly connected with the left end wall of the second shell, and the inner ring of the third bearing is fixedly connected with the second stirring rod; the vertical plate is fixed on the inner side wall of the second shell, the right end of the second stirring rod is rotatably connected with the vertical plate through a fourth bearing, the fourth bearing is embedded in the vertical plate, the outer ring of the fourth bearing is fixedly connected with the vertical plate, the inner ring of the fourth bearing is fixedly connected with the second stirring rod, and the side wall of the second stirring rod is provided with a spiral stirring blade;
the material storage device comprises a material storage box and a discharge valve, the top of the discharge box is communicated with the side wall of the right end of the second shell, and the discharge valve is arranged on the side wall of the material storage box.
The invention has the beneficial effects that:
1. according to the sewage treatment agent for the printing and dyeing textile industry, in the process of preparing the semi-treatment agent, the added kaolin has the performance of adsorbing various ions and impurities from surrounding media, and has weaker ion exchange property in a solution, and the aerogel has the property of gel and has an expansion effect, so that the adsorption space of the sewage treatment agent is increased, a large number of organic pollutants in the printing and dyeing textile sewage can be efficiently adsorbed, and nitrobacteria are added to decompose nitrogen-containing organic matters in the sewage, so that a water body is efficiently purified, and no secondary pollution is caused.
2. The invention also prepares a coconut shell activated carbon/chitosan compound, which takes chitosan as a main carrier, the chitosan molecules contain a large amount of-NH 2, and the compound is chelated by coordination bonds to form a high-molecular chelating agent, has good flocculation characteristics, is dissolved under the condition of acetic acid, changes the electronic state of the surface layer of the chitosan by sodium hydroxide and hydrochloric acid, and further adds the coconut shell activated carbon, the coconut shell activated carbon is a main active substance, and the chitosan is nontoxic, easy to degrade and good in biocompatibility; the coconut shell activated carbon has large deep activation specific surface area, rich inner holes, light density, larger adsorption space and good adsorption capacity, can fully contact and adsorb organic matters and impurity odor, and plays a role in purification; adding coconut shell activated carbon to uniformly adhere the coconut shell activated carbon to chitosan to obtain pretreatment liquid, further adding sodium alginate and gypsum powder into the pretreatment liquid, mixing and reacting the materials to obtain a pre-composite, and adding plant fiber to perform crosslinking modification so as to improve the stability and flocculation capacity of the chitosan.
3. In order to better prepare the sewage treatment agent, the invention also provides a spiral feeder which comprises a feeding and mixing chamber, a driving device, a spiral reaction chamber and a storage device, wherein a pretreatment agent and a gel silica gel are added into a first shell of the spiral feeder through a first feeding port, a second gear fixedly sleeved with an output shaft of a first motor is driven to rotate through the first motor, and then a first gear fixedly sleeved at the left end of a first stirring rod is driven to rotate through gear meshing connection, so that the first stirring rod is driven to rotate, and then rhombic stirring blades arranged on the first stirring rod uniformly mix materials, so that the mixing effect is good; the spiral reaction chamber is added with the material discharged from the first discharge port and the mixed auxiliary agent through the second charging port, the second stirring rod is driven to rotate through the second motor, the spiral stirring blade arranged on the side wall of the second stirring rod is driven to rotate, the material and the mixed auxiliary agent are stirred and mixed, the electric heating sleeve is simultaneously opened to heat the material, the material is conveyed to the right end of the spiral reaction chamber from the left end of the spiral reaction chamber, and the material falls into the storage box under the drainage action of the vertical plate, the discharge valve is further opened to obtain the semi-finished treatment agent, the spiral charging machine is simple in structure, in the preparation process of the semi-finished treatment agent, all raw materials are mixed step by step according to reaction conditions and are stored, and the spiral charging machine has practicability.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view of the screw feeder of the present invention;
FIG. 2 is a side view of the screw feeder of the present invention;
FIG. 3 is a top view of the screw feeder of the present invention;
FIG. 4 is a partial schematic view of the screw feeder of the present invention.
In the figure: 1. a first housing; 2. a first feed inlet; 3. a first stirring rod; 31. a rhombic stirring blade; 4. a first bearing; 5. a second bearing; 6. a first discharge port; 7. a first gear; 8. a supporting seat; 9. a motor fixing seat; 10. a first motor; 11. a second gear; 12. a gear protection housing; 13. a second housing; 14. a second feed inlet; 15. a second stirring rod; 16. an electric heating jacket; 17. a third bearing; 18. a vertical plate; 19. a fourth bearing; 20. a second motor; 21. a spiral stirring blade; 22. a material storage box; 23. a discharge valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A sewage treatment agent for printing and dyeing textile industry is prepared from the following raw materials in parts by weight: 35 parts of coconut shell activated carbon/chitosan compound, 8 parts of polyaluminium chloride, 3 parts of nickel nitrate, 7 parts of aerogel silica gel, 4 parts of polyferric sulfate, 6 parts of polyacrylamide, 8 parts of nitrobacteria and 8 parts of mixing auxiliary agent;
wherein, the coconut shell activated carbon/chitosan compound is prepared by the following steps:
s1, putting 26 parts by weight of chitosan and 16 parts by weight of coconut shell activated carbon into a pulverizer, pulverizing to 80-100 meshes for later use, putting the pulverized chitosan into a 250ml three-neck flask, dropwise adding 12 parts by weight of acetic acid into the three-neck flask, heating to 83 ℃ and keeping the temperature for 12min to dissolve the chitosan in the acetic acid, then adding 4 parts by weight of sodium hydroxide and 6 parts by weight of hydrochloric acid into the three-neck flask, and stirring for 12min to obtain a chitosan aqueous solution;
s2, putting the chitosan aqueous solution into a reaction kettle, adding 8 parts of coconut shell activated carbon into the reaction kettle, mixing and stirring at 88 ℃ for 25min, adding 4 parts of sodium acetate into the reaction kettle to prepare a slightly acidic solution environment, and continuously mixing and stirring for reacting for 16min to obtain a pretreatment solution;
s3, adding the pretreatment solution into a heating stirrer, adding 7 parts of sodium alginate and 7 parts of gypsum powder into the heating stirrer, setting the rotating speed to be 320r/min, stirring for 30min and the temperature to be 143 ℃, and mixing and reacting the materials to obtain a pre-composite;
s4, putting the pre-composite into a mixer, adding 6 parts of plant fiber, melting and mixing at the set rotating speed of 270r/min and the mixing temperature of 175 ℃, mixing for 25min, and cutting and granulating by a granulator to obtain a short-rod-shaped coconut shell activated carbon/chitosan composite;
wherein the concentration of the hydrochloric acid is 0.15mol/L, the specific surface area of the coconut shell activated carbon is 2300-2350m2The pore size distribution is 60-80 μm, and the mixing auxiliary agent is kaolin.
A preparation method of a sewage treatment agent for printing and dyeing textile industry comprises the following steps:
respectively crushing a coconut shell activated carbon/chitosan compound, polyaluminium chloride, nickel nitrate, aerogel silica gel, polyferric sulfate, polyacrylamide and a mixing aid in a crusher until the particle size is 80-100 meshes for later use, putting the coconut shell activated carbon/chitosan compound into a reaction kettle, adding the polyaluminium chloride and the nickel nitrate, mixing and stirring at 155 ℃ and 320r/min for 35min to obtain a primary mixed material;
secondly, putting the preliminary mixed material into an ultrasonic oscillator, adding polymeric ferric sulfate and polyacrylamide, and ultrasonically oscillating for 12min at 164 ℃ to obtain a pretreating agent;
adding a pretreating agent and aerogel silica gel into a first shell 1 of a spiral feeder through a first feeding port 2, opening a first motor 10, driving a second gear 11 fixedly sleeved with an output shaft of the first motor 10 to rotate through the first motor 10, driving a first gear 7 fixedly sleeved at the left end of a first stirring rod 3 to rotate through gear engagement connection, further driving the first stirring rod 3 to rotate, further uniformly mixing the materials through a rhombic stirring blade 31 arranged on the first stirring rod 3, and discharging the materials through a first discharging port 6 after setting mixing and stirring for 25 min; adding the material and the mixed auxiliary agent discharged from the first discharge port 6 into a spiral reaction chamber through a second feed port 14, turning on a second motor 20, driving a second stirring rod 15 to rotate through the second motor 20, further driving a spiral stirring blade 21 arranged on the side wall of the second stirring rod 15 to rotate, stirring and mixing the material and the mixed auxiliary agent, simultaneously turning on an electric heating sleeve 16 to heat the material, setting the heating temperature to be 155 ℃, conveying the material from the left end of the spiral reaction chamber to the right end of the spiral reaction chamber, allowing the material to fall into a storage box 22 under the drainage action of a vertical plate 18, and further turning on a discharge valve 23 to obtain a semi-finished treatment agent;
and step four, putting the semi-finished product treating agent into a stirrer, adding nitrobacteria into the stirrer, setting the rotating speed at 320r/min and the temperature at 72 ℃, mixing and stirring for 12min, freeze-drying for 2h, and then grinding to obtain the dyeing textile sewage treating agent with the particle size of 300-350 meshes.
Example 2
A sewage treatment agent for printing and dyeing textile industry is prepared from the following raw materials in parts by weight: 30 parts of coconut shell activated carbon/chitosan compound, 10 parts of polyaluminium chloride, 5 parts of nickel nitrate, 10 parts of aerogel silica gel, 5 parts of polyferric sulfate, 8 parts of polyacrylamide, 5 parts of nitrobacteria and 10 parts of mixing auxiliary agent;
wherein, the coconut shell activated carbon/chitosan compound is prepared by the following steps:
s1, putting 30 parts by weight of chitosan and 10 parts by weight of coconut shell activated carbon into a pulverizer, pulverizing to 80-100 meshes for later use, putting the pulverized chitosan into a 250ml three-neck flask, dropwise adding 10 parts by weight of acetic acid into the three-neck flask, heating to 85 ℃ and keeping the temperature for 10min to dissolve the chitosan in the acetic acid, then adding 5 parts by weight of sodium hydroxide and 8 parts by weight of hydrochloric acid into the three-neck flask, and stirring for 15min to obtain a chitosan aqueous solution;
s2, putting the chitosan aqueous solution into a reaction kettle, adding 10 parts of coconut shell activated carbon into the reaction kettle, mixing and stirring at the reaction temperature of 90 ℃ for 20min, adding 3 parts of sodium acetate into the reaction kettle to prepare a slightly acidic solution environment, and continuously mixing and stirring for reaction for 20min to obtain a pretreatment solution;
s3, adding the pretreatment solution into a heating stirrer, adding 5 parts of sodium alginate and 10 parts of gypsum powder into the heating stirrer, setting the rotating speed to be 350r/min, stirring for 25min and the temperature to be 140 ℃, and mixing and reacting the materials to obtain a pre-composite;
s4, putting the pre-composite into a mixer, adding 10 parts of plant fiber, melting and mixing at 185 ℃ at a rotation speed of 300r/min for 20min, and cutting and granulating by a granulator to obtain a short-rod-shaped coconut shell activated carbon/chitosan composite;
wherein the concentration of the hydrochloric acid is 0.1mol/L, the specific surface area of the coconut shell activated carbon is 2300-2350m2The pore size distribution is 60-80 μm, and the mixing auxiliary agent is kaolin.
A preparation method of a sewage treatment agent for printing and dyeing textile industry comprises the following steps:
respectively crushing a coconut shell activated carbon/chitosan compound, polyaluminium chloride, nickel nitrate, aerogel silica gel, polyferric sulfate, polyacrylamide and a mixing auxiliary agent in a crusher until the particle size is 80-100 meshes for later use, putting the coconut shell activated carbon/chitosan compound into a reaction kettle, adding the polyaluminium chloride and the nickel nitrate, mixing and stirring at 165 ℃ and 300r/min for 30min to obtain a primary mixed material;
secondly, putting the preliminary mixed material into an ultrasonic oscillator, adding polymeric ferric sulfate and polyacrylamide, and ultrasonically oscillating for 15min at 160 ℃ to obtain a pretreating agent;
adding a pretreating agent and aerogel silica gel into a first shell 1 of a spiral feeder through a first feeding port 2, opening a first motor 10, driving a second gear 11 fixedly sleeved with an output shaft of the first motor 10 to rotate through the first motor 10, driving a first gear 7 fixedly sleeved at the left end of a first stirring rod 3 to rotate through gear engagement connection, further driving the first stirring rod 3 to rotate, further uniformly mixing the materials through a rhombic stirring blade 31 arranged on the first stirring rod 3, and discharging the materials through a first discharging port 6 after setting mixing and stirring for 20 min; adding the material and the mixed auxiliary agent discharged from the first discharge port 6 into a spiral reaction chamber through a second feed port 14, turning on a second motor 20, driving a second stirring rod 15 to rotate through the second motor 20, further driving a spiral stirring blade 21 arranged on the side wall of the second stirring rod 15 to rotate, stirring and mixing the material and the mixed auxiliary agent, simultaneously turning on an electric heating sleeve 16 to heat the material, setting the heating temperature to be 160 ℃, conveying the material from the left end of the spiral reaction chamber to the right end of the spiral reaction chamber, allowing the material to fall into a storage box 22 under the drainage action of a vertical plate 18, and further turning on a discharge valve 23 to obtain a semi-finished treatment agent;
and step four, putting the semi-finished product treating agent into a stirrer, adding nitrobacteria into the stirrer, setting the rotating speed at 300r/min and the temperature at 70 ℃, mixing and stirring for 15min, freeze-drying for 2h, and then grinding to obtain the dyeing textile sewage treating agent with the particle size of 300-350 meshes.
Example 3
A sewage treatment agent for printing and dyeing textile industry is prepared from the following raw materials in parts by weight: 40 parts of coconut shell activated carbon/chitosan compound, 5 parts of polyaluminium chloride, 1 part of nickel nitrate, 5 parts of aerogel silica gel, 3 parts of polyferric sulfate, 5 parts of polyacrylamide, 10 parts of nitrobacteria and 5 parts of mixed auxiliary agent;
wherein, the coconut shell activated carbon/chitosan compound is prepared by the following steps:
s1, putting 20 parts by weight of chitosan and 20 parts by weight of coconut shell activated carbon into a pulverizer, pulverizing to 80-100 meshes for later use, putting the pulverized chitosan into a 250ml three-neck flask, dropwise adding 15 parts by weight of acetic acid into the three-neck flask, heating to 80-85 ℃, keeping the temperature for 10-15min, dissolving the chitosan in the acetic acid, then adding 3 parts by weight of sodium hydroxide and 5 parts by weight of hydrochloric acid into the three-neck flask, and stirring for 10min to obtain a chitosan aqueous solution;
s2, putting the chitosan aqueous solution into a reaction kettle, adding 5 parts of coconut shell activated carbon into the reaction kettle, mixing and stirring at 85 ℃ for 30min, adding 5 parts of sodium acetate into the reaction kettle to prepare a slightly acidic solution environment, and continuously mixing and stirring for reaction for 15min to obtain a pretreatment solution;
s3, adding the pretreatment solution into a heating stirrer, adding 10 parts of sodium alginate and 5 parts of gypsum powder into the heating stirrer, setting the rotating speed at 300r/min, the stirring time at 35min and the temperature at 150 ℃, and mixing and reacting the materials to obtain a pre-composite;
s4, putting the pre-composite into a mixer, adding 5 parts of plant fiber, melting and mixing at the set rotation speed of 250r/min and the mixing temperature of 170 ℃ for 30min, and cutting and granulating by a granulator to obtain a short-rod-shaped coconut shell activated carbon/chitosan composite;
wherein the mixed auxiliary agent is kaolin, the concentration of the hydrochloric acid is 0.2mol/L, and the specific surface area of the coconut shell activated carbon is 2300-2350m2The pore size distribution is 60-80 μm.
A preparation method of a sewage treatment agent for printing and dyeing textile industry comprises the following steps:
respectively crushing a coconut shell activated carbon/chitosan compound, polyaluminium chloride, nickel nitrate, aerogel silica gel, polyferric sulfate, polyacrylamide and a mixing aid in a crusher until the particle size is 80-100 meshes for later use, putting the coconut shell activated carbon/chitosan compound into a reaction kettle, adding the polyaluminium chloride and the nickel nitrate, mixing and stirring at 150 ℃ and 350r/min for 30-40min to obtain a primary mixed material;
secondly, putting the preliminary mixed material into an ultrasonic oscillator, adding polymeric ferric sulfate and polyacrylamide, and ultrasonically oscillating for 10min at 170 ℃ to obtain a pretreating agent;
adding a pretreating agent and aerogel silica gel into a first shell 1 of a spiral feeder through a first feeding port 2, opening a first motor 10, driving a second gear 11 fixedly sleeved with an output shaft of the first motor 10 to rotate through the first motor 10, driving a first gear 7 fixedly sleeved at the left end of a first stirring rod 3 to rotate through gear engagement connection, further driving the first stirring rod 3 to rotate, further uniformly mixing the materials through a rhombic stirring blade 31 arranged on the first stirring rod 3, and discharging the materials through a first discharging port 6 after setting mixing and stirring for 30 min; adding the material and the mixed auxiliary agent discharged from the first discharge port 6 into a spiral reaction chamber through a second feed port 14, turning on a second motor 20, driving a second stirring rod 15 to rotate through the second motor 20, further driving a spiral stirring blade 21 arranged on the side wall of the second stirring rod 15 to rotate, stirring and mixing the material and the mixed auxiliary agent, simultaneously turning on an electric heating sleeve 16 to heat the material, setting the heating temperature to be 150 ℃, conveying the material from the left end of the spiral reaction chamber to the right end of the spiral reaction chamber, allowing the material to fall into a storage box 22 under the drainage action of a vertical plate 18, and further turning on a discharge valve 23 to obtain a semi-finished treatment agent;
and step four, putting the semi-finished product treating agent into a stirrer, adding nitrobacteria into the stirrer, setting the rotating speed at 350r/min and the temperature at 75 ℃, mixing and stirring for 10min, freeze-drying for 2h, and then grinding to obtain the dyeing textile sewage treating agent with the particle size of 300-350 meshes.
Comparative example 1
The raw materials in parts by weight of the sewage treatment agent for the textile printing and dyeing industry are the same as those in example 1, but 35 parts of coconut shell activated carbon/chitosan compound is changed into 35 parts of common coconut shell activated carbon.
A preparation method of the sewage treatment agent for the printing and dyeing textile industry, which is the same as the preparation method of the embodiment 1.
The same type of textile printing sewage was treated using the textile printing industry sewage treatment agents prepared in examples 1, 2, 3 and comparative example 1, and the detection results of the treated textile printing sewage are shown in table 1 in units (mg/L);
the TOC content was measured by the nondispersive infrared absorption method of method No. GB13193-91, the SS content was measured by method No. GB1190, the chromaticity was measured by the distillation-neutralization titration method of method No. GB6920, the pH was measured by GB6920-86, and the measurement results are shown in table 1.
TABLE 1
| Item | Input amount | TOC | SS | Color intensity | pH |
| Dyeing and printing textile sewage water sample | / | 14.3 | 642 | >100000 | 5.3 |
| Example 1 | 100 | 0.63 | 12 | 3 | 7.1 |
| Example 2 | 100 | 0.70 | 13 | 4 | 6.9 |
| Example 3 | 100 | 0.68 | 14 | 5 | 7.0 |
| Comparative example 1 | 100 | 4.5 | 253 | 5640 | 6.2 |
As can be seen from the data in Table 1, the treatment agents for textile printing industry prepared in comparative example 1 of each example are used for treating the same type of textile printing sewage, and the TOC value and the SS value of the sewage treated in each example are detected to be far lower than those of the sewage treated in comparative example 1, which shows that the treatment agents for textile printing industry prepared in the invention can effectively adsorb various organic matters in the sewage to achieve the purpose of purifying the sewage, and the chroma of the sewage is obviously lower than that of the sewage treated in comparative example 1, which shows that the treatment agents for textile printing industry prepared in the invention can effectively adsorb organic dyes, the pH of the treated sewage is basically close to neutral, and the pH of the sewage treated in comparative example 1 is acidic.
The sewage treatment agent prepared by the invention has good effect of treating printing and dyeing textile sewage, the treated sewage reaches the national emission standard, can be recycled, saves water resources, is more environment-friendly, and is a high-efficiency sewage treatment agent.
Please refer to fig. 1-4: the spiral feeder in the embodiment comprises a feeding mixing chamber, a driving device, a spiral reaction chamber and a material storage device;
the charging and mixing chamber comprises a first shell 1, a first charging opening 2, a first stirring rod 3, a first bearing 4, a second bearing 5, a first discharging opening 6 and a first gear 7;
the first feeding port 2 is arranged at the top of the first shell 1, the first discharging port 6 is arranged at the bottom of the first shell 1, the first bearing 4 is embedded through the left side wall of the first shell 1, the left end of the first stirring rod 3 is rotatably connected with the left side wall of the first shell 1 through the first bearing 4, the inner ring of the first bearing 4 is fixedly connected with the first stirring rod 3, and the outer ring of the first bearing 4 is fixedly connected with the left side wall of the first shell 1;
the second bearing 5 is embedded into the right side wall of the first shell 1, the right end of the first stirring rod 3 is rotatably connected with the right side wall of the first shell 1 through the second bearing 5, the outer ring of the second bearing 5 is fixedly connected with the right side wall of the first shell 1, and the inner ring of the second bearing 5 is fixedly connected with the other end of the first stirring rod 3;
the first gear 7 is fixedly sleeved on the first stirring rod 3 on the left side of the first bearing 4, rhombic stirring blades 31 are uniformly arranged on the side wall of the first stirring rod 3, and a supporting seat 8 is arranged at the bottom of the first shell 1;
the driving device comprises a motor fixing seat 9, a first motor 10, a second gear 11 and a gear protection shell 12, the motor fixing seat 9 is arranged on the outer side wall of the first shell 1 and is flush with the bottom of the first shell 1, the first motor 10 is arranged on the motor fixing seat 9, a second gear 11 is fixedly arranged on an output shaft of the first motor 10, the second gear 11 is connected with the first gear 7 through gear meshing, the first motor 10 drives the second gear 11 to rotate, and the second gear 11 is connected through gear meshing to enable the first gear 7 to rotate so as to drive the first stirring rod 3 to rotate;
the gear protection shell 12 is arranged on the motor fixing seat 9;
the spiral reaction chamber comprises a second shell 13, a second feeding hole 14, a second stirring rod 15, an electric heating sleeve 16, a third bearing 17, a vertical plate 18, a fourth bearing 19 and a second motor 20;
the left end wall of the second shell 13 is fixedly connected with the right end wall of the first shell 1, the second shell 13 is of a horizontal cylinder structure, a second feed inlet 14 is arranged on the outer side wall of the second shell 13, and the inner side wall of the second shell 13 is provided with an electric heating sleeve 16;
the second motor 20 is arranged on the outer side of the right end wall of the second shell 13, and an output shaft of the second motor 20 is fixedly connected with a second stirring rod 15;
the left end of the second stirring rod 15 is rotatably connected with the left end wall of the second shell 13 through a third bearing 17, the third bearing 17 is embedded into the left end wall of the second shell 13, the outer ring of the third bearing 17 is fixedly connected with the left end wall of the second shell 13, and the inner ring of the third bearing 17 is fixedly connected with the second stirring rod 15;
a vertical plate 18 is fixed on the inner side wall of the second shell 13, the right end of the second stirring rod 15 is rotatably connected with the vertical plate 18 through a fourth bearing 19, the fourth bearing 19 is embedded in the vertical plate 18, the outer ring of the fourth bearing 19 is fixedly connected with the vertical plate 18, and the inner ring of the fourth bearing 19 is fixedly connected with the second stirring rod 15;
the side wall of the second stirring rod 15 is provided with a spiral stirring blade 21, the spiral stirring blade 21 can increase the material mixing time, so that the materials are fully mixed, and the mixed materials are automatically conveyed out;
the storage device comprises a storage box 22 and a discharge valve 23, the top of the discharge box 22 is communicated with the side wall of the right end of the second shell 13, and the discharge valve 23 is arranged on the side wall of the storage box 22.
The working method of the spiral feeder comprises the following steps: adding a pretreatment agent and gel silica gel into a first shell 1 of a spiral feeder through a first feeding port 2, opening a first motor 10, driving a second gear 11 fixedly sleeved with an output shaft of the first motor 10 to rotate through the first motor 10, further driving a first gear 7 fixedly sleeved at the left end of a first stirring rod 3 to rotate through gear meshing connection, further driving the first stirring rod 3 to rotate, further uniformly mixing materials through a rhombic stirring blade 31 arranged on the first stirring rod 3, and discharging the mixed materials through a first discharging port 6; add the spiral reaction chamber with first discharge gate 6 discharged material and mixed auxiliary agent through second charge door 14 in, open second motor 20, drive second stirring rod 15 through second motor 20 and rotate, and then the spiral stirring leaf 21 that is equipped with on the 15 lateral walls of drive second stirring rod rotates, mix the material with mixed auxiliary agent stirring, it heats the material to open electric heating jacket 16 simultaneously, the material conveys the right-hand member to the spiral reaction chamber from the left end of spiral reaction chamber, and under the drainage effect of riser 18, fall to in the storage case 22, further open bleeder valve 23 and obtain semi-manufactured goods treating agent.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (8)
1. The sewage treatment agent for the printing and dyeing textile industry is characterized by being prepared from the following raw materials in parts by weight: 30-40 parts of coconut shell activated carbon/chitosan compound, 5-10 parts of polyaluminium chloride, 1-5 parts of nickel nitrate, 5-10 parts of aerogel silica gel, 3-5 parts of polyferric sulfate, 5-8 parts of polyacrylamide, 5-10 parts of nitrobacteria and 5-10 parts of mixing auxiliary agent;
wherein, the coconut shell activated carbon/chitosan compound is prepared by the following steps:
s1, taking 20-30 parts of chitosan and 10-20 parts of coconut shell activated carbon in parts by weight, crushing the chitosan and 10-100 meshes of coconut shell activated carbon in a crusher for standby, putting the crushed chitosan into a 250ml three-neck flask, dropwise adding 10-15 parts of acetic acid into the three-neck flask, heating to 80-85 ℃ and keeping the temperature for 10-15min to dissolve the chitosan in the acetic acid, then adding 3-5 parts of sodium hydroxide and 5-8 parts of hydrochloric acid into the three-neck flask, and stirring for 10-15min to obtain a chitosan aqueous solution;
s2, putting the chitosan aqueous solution into a reaction kettle, adding 5-10 parts of coconut shell activated carbon into the reaction kettle, mixing and stirring at 85-90 ℃ for 20-30min, adding 3-5 parts of sodium acetate into the reaction kettle to prepare a slightly acidic solution environment, and continuously mixing and stirring for reaction for 15-20min to obtain a pretreatment solution;
s3, adding the pretreatment solution into a heating stirrer, adding 5-10 parts of sodium alginate and 5-10 parts of gypsum powder into the heating stirrer, setting the rotation speed at 300-35 min, the stirring time at 140-150 ℃, and mixing and reacting the materials to obtain a pre-composite;
s4, placing the pre-composite into a mixer, adding 5-10 parts of plant fiber for melt mixing, setting the rotation speed at 250-185 ℃ and the mixing temperature at 170-185 ℃, and cutting and granulating by a granulator after mixing for 20-30min to obtain a short rod-shaped coconut shell activated carbon/chitosan composite;
the sewage treatment agent for the printing and dyeing textile industry is prepared by the following steps:
respectively crushing the coconut shell activated carbon/chitosan compound, polyaluminium chloride, nickel nitrate, aerogel silica gel, polyferric sulfate, polyacrylamide and a mixing auxiliary agent in a crusher until the particle size is 80-100 meshes for later use, putting the coconut shell activated carbon/chitosan compound into a reaction kettle, adding the polyaluminium chloride and the nickel nitrate, mixing and stirring for 30-40min at the temperature of 150-;
step two, putting the preliminary mixed material into an ultrasonic oscillator, adding polymeric ferric sulfate and polyacrylamide, and performing ultrasonic oscillation for 10-15min at the temperature of 160-170 ℃ to obtain a pretreating agent;
adding the pretreating agent, the aerogel silica gel and the mixed auxiliary agent into a spiral feeder, and preparing a semi-finished product treating agent by the spiral feeder;
and step four, putting the semi-finished product treating agent into a stirrer, adding nitrobacteria into the stirrer, setting the rotating speed at 300-350r/min and the temperature at 70-75 ℃, mixing and stirring for 10-15min, and grinding after freeze drying for 2h to obtain the dyeing textile sewage treating agent with the particle size of 300-350 meshes.
2. The treating agent for sewage from textile printing and dyeing industry according to claim 1, wherein the concentration of hydrochloric acid is 0.1-0.2 mol/L.
3. The method of claim 1The sewage treatment agent for the printing and dyeing textile industry is characterized in that the specific surface area of the coconut shell activated carbon is 2300-2The pore size distribution is 60-80 μm.
4. The treating agent for sewage from textile printing and dyeing industry as claimed in claim 1, wherein the mixing assistant is kaolin.
5. A preparation method of a sewage treatment agent for printing and dyeing textile industry is characterized by comprising the following steps:
respectively crushing the coconut shell activated carbon/chitosan compound, polyaluminium chloride, nickel nitrate, aerogel silica gel, polyferric sulfate, polyacrylamide and a mixing auxiliary agent in a crusher until the particle size is 80-100 meshes for later use, putting the coconut shell activated carbon/chitosan compound into a reaction kettle, adding the polyaluminium chloride and the nickel nitrate, mixing and stirring for 30-40min at the temperature of 150-;
step two, putting the preliminary mixed material into an ultrasonic oscillator, adding polymeric ferric sulfate and polyacrylamide, and performing ultrasonic oscillation for 10-15min at the temperature of 160-170 ℃ to obtain a pretreating agent;
adding a pretreating agent and aerogel silica gel into a first shell (1) of a spiral feeder through a first feeding port (2), opening a first motor (10), driving a second gear (11) fixedly sleeved with an output shaft of the first motor (10) to rotate through the first motor (10), further driving a first gear (7) fixedly sleeved at the left end of a first stirring rod (3) to rotate through gear meshing connection, further driving the first stirring rod (3) to rotate, further uniformly mixing the materials through a rhombic stirring blade (31) arranged on the first stirring rod, and discharging the materials through a first discharging port (6) after setting mixing and stirring for 20-30 min; adding the material and the mixed auxiliary agent discharged from the first discharge port (6) into a spiral reaction chamber through a second feed port (14), opening a second motor (20), driving a second stirring rod (15) to rotate through the second motor (20), further driving a spiral stirring blade (21) arranged on the side wall of the second stirring rod (15) to rotate, stirring and mixing the material and the mixed auxiliary agent, simultaneously opening an electric heating sleeve (16) to heat the material, setting the heating temperature to be 150-;
and step four, putting the semi-finished product treating agent into a stirrer, adding nitrobacteria into the stirrer, setting the rotating speed at 300-350r/min and the temperature at 70-75 ℃, mixing and stirring for 10-15min, and grinding after freeze drying for 2h to obtain the dyeing textile sewage treating agent with the particle size of 300-350 meshes.
6. The preparation method of the sewage treatment agent for the printing and dyeing textile industry according to claim 5, wherein the spiral feeder comprises a feeding and mixing chamber, a driving device, a spiral reaction chamber and a storage device;
the charging and mixing chamber comprises a first shell (1), a first charging hole (2), a first stirring rod (3), a first bearing (4), a second bearing (5), a first discharging hole (6) and a first gear (7);
the first feeding port (2) is arranged at the top of the first shell (1), the first discharging port (6) is arranged at the bottom of the first shell (1), the first bearing (4) is embedded in the left side wall of the first shell (1), the left end of the first stirring rod (3) is rotatably connected with the left side wall of the first shell (1) through the first bearing (4), the inner ring of the first bearing (4) is fixedly connected with the first stirring rod (3), and the outer ring of the first bearing (4) is fixedly connected with the left side wall of the first shell (1);
the second bearing (5) is embedded into the right side wall of the first shell (1), the right end of the first stirring rod (3) is rotatably connected with the right side wall of the first shell (1) through the second bearing (5), the outer ring of the second bearing (5) is fixedly connected with the right side wall of the first shell (1), and the inner ring of the second bearing (5) is fixedly connected with the other end of the first stirring rod (3);
the first gear (7) is fixedly sleeved on the first stirring rod (3) on the left side of the first bearing (4), rhombic stirring blades (31) are uniformly arranged on the side wall of the first stirring rod (3), and a supporting seat (8) is arranged at the bottom of the first shell (1);
the driving device comprises a motor fixing seat (9), a first motor (10), a second gear (11) and a gear protection shell (12), wherein the motor fixing seat (9) is arranged on the outer side wall of the first shell (1) and is flush with the bottom of the first shell (1), the first motor (10) is arranged on the motor fixing seat (9), the second gear (11) is fixedly arranged on an output shaft of the first motor (10), the second gear (11) is connected with the first gear (7) through gear meshing, and the gear protection shell (12) is arranged on the motor fixing seat (9);
the spiral reaction chamber comprises a second shell (13), a second feed inlet (14), a second stirring rod (15), an electric heating sleeve (16), a third bearing (17), a vertical plate (18), a fourth bearing (19) and a second motor (20), the left end wall of the second shell (13) is fixedly connected with the right end wall of the first shell (1), the second shell (13) is of a horizontal cylinder structure, the second feed inlet (14) is arranged on the outer side wall of the second shell (13), the inner side wall of the second shell (13) is provided with the electric heating sleeve (16), the second motor (20) is arranged on the outer side of the right end wall of the second shell (13), and an output shaft of the second motor (20) is fixedly connected with the second stirring rod (15);
the left end of the second stirring rod (15) is rotatably connected with the left end wall of the second shell (13) through a third bearing (17), the third bearing (17) is embedded into the left end wall of the second shell (13), the outer ring of the third bearing (17) is fixedly connected with the left end wall of the second shell (13), and the inner ring of the third bearing (17) is fixedly connected with the second stirring rod (15);
a vertical plate (18) is fixed on the inner side wall of the second shell (13), the right end of the second stirring rod (15) is rotatably connected with the vertical plate (18) through a fourth bearing (19), the vertical plate (18) is embedded in the fourth bearing (19), the outer ring of the fourth bearing (19) is fixedly connected with the vertical plate (18), and the inner ring of the fourth bearing (19) is fixedly connected with the second stirring rod (15);
the material storage device comprises a material storage box (22) and a discharge valve (23), the top of the discharge box (22) is communicated with the side wall of the right end of the second shell (13), and the discharge valve (23) is arranged on the side wall of the material storage box (22).
7. The method for preparing a wastewater treatment agent for textile printing and dyeing industry according to claim 6, wherein the side wall of the second stirring rod (15) is provided with a spiral stirring blade (21).
8. The method for preparing the sewage treatment agent for the printing and dyeing textile industry according to claim 6, wherein the spiral feeder works by the following method: adding a pretreating agent and gel silica gel into a first shell (1) of a spiral feeder through a first feeding port (2), opening a first motor (10), driving a second gear (11) fixedly sleeved with an output shaft of the first motor (10) to rotate through the first motor (10), further driving a first gear (7) fixedly sleeved at the left end of a first stirring rod (3) to rotate through gear meshing connection, further driving the first stirring rod (3) to rotate, further uniformly mixing materials through a rhombic stirring blade (31) arranged on the first stirring rod (3), and discharging the mixed materials through a first discharging port (6); add first discharge gate (6) discharged material and mixed auxiliary agent in the spiral reaction chamber through second charge door (14), open second motor (20), rotate through second motor (20) drive second stirring rod (15), and then spiral stirring leaf (21) that are equipped with on drive second stirring rod (15) lateral wall rotate, mix the material with mixed auxiliary agent stirring, open electric heating jacket (16) simultaneously and heat the material, the material conveys the right-hand member to the spiral reaction chamber from the left end of spiral reaction chamber, and under the drainage effect of riser (18), fall to in storage case (22), further open bleeder valve (23) and obtain semi-manufactured goods finishing agent.
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