CN111348700A - Treatment method of printing and dyeing textile industry sewage - Google Patents
Treatment method of printing and dyeing textile industry sewage Download PDFInfo
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- CN111348700A CN111348700A CN202010259129.XA CN202010259129A CN111348700A CN 111348700 A CN111348700 A CN 111348700A CN 202010259129 A CN202010259129 A CN 202010259129A CN 111348700 A CN111348700 A CN 111348700A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
Abstract
The invention discloses a method for treating sewage in printing and dyeing textile industry, wherein a sewage treating agent is used in the treatment process, and the sewage treating agent is prepared from the following raw materials in parts by weight: 25-30 parts of corn straw, 70-90 parts of deionized water, 50-60 parts of nitric acid-ethanol mixed solution, 13-20 parts of absolute ethyl alcohol, 5-8 parts of bentonite, 5-8 parts of vermiculite, 20-30 parts of hydrochloric acid solution, 20-25 parts of ferric chloride solution, 60-80 parts of potassium hydroxide solution, 40-50 parts of sodium hypochlorite solution, 13.5-15 parts of aluminum sulfate, 3.5-5 parts of polyacrylamide and 3-5 parts of sodium silicate; contain bentonite and vermiculite through acid treatment among this sewage treatment agent, both are the big porous active material of specific surface area, and the strong effectual chroma and the COD that has reduced sewage of adsorptivity, this sewage treatment agent can react with water and produce iron hydroxide and aluminium hydroxide colloid, can adsorb the impurity of suspension in the water to form stable sediment, make the water clarification, further promoted sewage treatment agent treatment effect.
Description
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to a method for treating sewage in the printing and dyeing textile industry.
Background
The textile wastewater is mainly wastewater containing natural impurities, fat, starch and other organic matters generated in the processes of raw material cooking, rinsing, bleaching, sizing and the like, the printing and dyeing wastewater is generated in a plurality of working procedures of washing, dyeing, printing, sizing and the like, contains a large amount of dye, starch, cellulose, lignin, detergent and other organic matters, alkali, sulfide, various salts and other inorganic matters, and has strong pollution;
the Chinese patent CN101712503A discloses a method for treating sewage in the printing and dyeing textile industry, which comprises the following steps: adding a purifying agent into the printing and dyeing industrial sewage, and precipitating to obtain sludge; adding a flocculating agent for filter pressing: adding a flocculating agent into the sludge, mixing, and filtering out water through a filter press to obtain a sludge mass; degerming: adding quicklime into the mud mass obtained after filter pressing, and uniformly mixing to obtain a mud blank; forming: and (5) conveying the mud blank into a forming machine for pressure maintaining and dewatering to obtain a mud block. The invention enhances the flammability of the sludge clods, enables the sludge clods to be used as industrial dye, greatly increases the use value of the sewage water treatment by-products, but the invention has common treatment effect on the printing and dyeing textile industry sewage, remains partial pollutants in the treated sewage, and has more complex treatment process and lower treatment efficiency.
Disclosure of Invention
The invention aims to provide a method for treating sewage in the printing and dyeing textile industry, wherein a sewage treating agent is added in the sewage treatment process, the sewage treating agent contains bentonite and vermiculite which are subjected to acid treatment, both the bentonite and the vermiculite are porous active substances with large specific surface areas, the sewage treating agent has strong adsorbability, the treatment on sewage chromaticity and the COD (chemical oxygen demand) reducing capability are effectively enhanced, the sewage treating agent can react with water to generate ferric hydroxide and aluminum hydroxide colloid, the ferric hydroxide and the aluminum hydroxide colloid have strong adsorbability, impurities suspended in water can be adsorbed, stable precipitates are formed, water is clarified, and the treatment effect of the sewage treating agent is further improved;
the technical problems to be solved by the invention are as follows:
1. the prior common treatment method for the printing and dyeing textile industry sewage has complex process flow, needs to add various reagents for sewage treatment in the sewage treatment process, needs to carry out multiple treatments to reach the discharge standard, needs to cool part of sewage treatment, and has higher sewage treatment cost;
2. the existing sewage treatment agent used in the treatment of the sewage in the printing and dyeing textile industry has a common treatment effect, a large amount of sewage treatment agents of different types need to be added, so that the waste phenomenon is serious, part of sewage treatment is carried out by using a biochemical method, the printing and dyeing wastewater of cotton textiles is organic wastewater, the main components are artificially synthesized organic matters and part of natural organic matters, and a certain amount of substances which are difficult to biodegrade are contained, so that the treated sewage cannot reach the discharge standard;
3. the sewage treatment equipment commonly used is long in sewage treatment time, needs to be added with the medicament for multiple times, and can cause sewage to be subjected to secondary pollution in the adding process, so that the sewage treatment efficiency is further influenced.
The purpose of the invention can be realized by the following technical scheme:
a treatment method of sewage in the printing and dyeing textile industry comprises the following specific steps:
step S1: firstly, primarily filtering the printing and dyeing textile industry sewage through a grid and a screen, and introducing the filtered printing and dyeing textile industry sewage into a first sedimentation tank to obtain primary sedimentation sewage;
step S2: introducing the primary precipitation sewage obtained in the step S1 into a second precipitation tank, adding a flocculating agent, performing secondary precipitation and filtering to obtain secondary precipitation sewage;
step S3: introducing the secondary precipitated sewage into a sewage treatment device, adding a sewage treatment agent, and performing sewage treatment to obtain treated sewage;
step S4: and (4) filtering the treated sewage obtained in the step (S3) to obtain the water which reaches the discharge standard.
Further, the flocculating agent is one or more of aluminum sulfate, aluminum chloride, ferric sulfate and ferric chloride mixed in any proportion.
Further, the sewage treatment agent is prepared from the following raw materials in parts by weight: 25-30 parts of corn straw, 70-90 parts of deionized water, 50-60 parts of nitric acid-ethanol mixed solution, 13-20 parts of absolute ethyl alcohol, 5-8 parts of bentonite, 5-8 parts of vermiculite, 20-30 parts of hydrochloric acid solution, 20-25 parts of ferric chloride solution, 60-80 parts of potassium hydroxide solution, 40-50 parts of sodium hypochlorite solution, 13.5-15 parts of aluminum sulfate, 3.5-5 parts of polyacrylamide and 3-5 parts of sodium silicate;
the sewage treatment agent is prepared by the following method:
a1: removing leaves of corn straws, cutting the corn straws into small sections, cleaning the small sections by using deionized water, cooking the small sections in boiling water for 1 to 2 hours, putting the cooked corn straws into an oven, drying the small sections at the temperature of 100 ℃ plus 110 ℃, crushing the dried corn straws, sieving the crushed corn straws with a 60 to 80-mesh sieve, adding the corn straw powder and a nitric acid-ethanol mixed solution into a reaction kettle, heating the mixed solution in a boiling water bath until the corn straw powder turns white, washing the mixed solution twice by using absolute ethyl alcohol, performing suction filtration, putting the filtered corn straw powder into the oven, and drying the filtered corn straw powder at the temperature of 80 to 100 ℃ to prepare first solid powder;
a2: adding bentonite, vermiculite and hydrochloric acid solution into a reaction kettle, stirring for 4-5h at the rotation speed of 500-800r/min and the temperature of 80-90 ℃, filtering, removing filtrate, washing twice with deionized water, and drying at the temperature of 100-110 ℃ to obtain second solid powder;
a3: adding an iron chloride solution, a potassium hydroxide solution and a sodium hypochlorite solution into a reaction kettle, stirring for 1-2h at the rotation speed of 300-plus-500 r/min and the temperature of 25-30 ℃, filtering, drying at the temperature of 100-plus-110 ℃ to obtain third solid powder, adding the third solid powder, aluminum sulfate and deionized water into the reaction kettle, stirring for 3-5h at the rotation speed of 300-plus-500 r/min and the temperature of 1-5 ℃, filtering, removing filtrate, and drying at the temperature of 100-plus-110 ℃ to obtain fourth solid powder;
a4: and (3) adding the first solid powder prepared in the step A1, the second solid powder prepared in the step A2, the fourth solid powder prepared in the step A3, polyacrylamide and sodium silicate into a ball mill, performing ball milling for 40-50min under the condition that the rotating speed is 20-30r/min, and sieving by using a sieve of 80-100 meshes to prepare the sewage treatment agent.
Further, the dosage ratio of the concentrated nitric acid to the ethanol in the nitric acid-ethanol mixed solution is 1: 4, the mass fraction concentration of the concentrated nitric acid is 65-69%, the mass concentration of the hydrochloric acid solution is 1-1.5mol/L, the mass concentration of the ferric chloride solution is 0.02-0.05mol/L, the mass concentration of the potassium hydroxide solution is 3-5mol/L, and the mass fraction concentration of the sodium hypochlorite solution is 9.5-10%.
Further, the deionized water in the step a1, the deionized water in the step a2, and the deionized water in the step A3 are used in a ratio of 5: 5: 1.
further, the sewage treatment device of step S3 includes a water storage tank, a first water pipe, a first decontamination chamber, a second water pipe, and a second decontamination chamber, wherein a water storage tank water outlet is formed at a bottom end of one side of the water storage tank, a spray layer is arranged at a top end of the first decontamination chamber, a spray layer water inlet is formed at an upper end of the spray layer, the spray layer water inlet penetrates through a chamber wall of the first decontamination chamber, one end of the first water pipe is fixedly connected with the water storage tank water outlet, the other end of the first water pipe is fixedly connected with the spray layer water inlet, a plurality of nozzles are arranged at a lower end of the spray layer, a filter plate is further arranged inside the first decontamination chamber, and a decontamination chamber water outlet is formed at a bottom end of one side of the first decontamination chamber;
a water inlet of the decontamination bin is formed in the top end of one side of the second decontamination bin, a water outlet is formed in the bottom end of one side of the second decontamination bin, a transmission layer is arranged on the top end of the outside of the second decontamination bin, a first transmission gear, a second transmission gear and a third transmission gear are arranged inside the transmission layer and are respectively positioned on two sides of the first transmission gear, the first transmission gear is meshed with the second transmission gear, the first transmission gear is meshed with the third transmission gear, a storage hopper is arranged at the upper end of the transmission layer, a feed opening is formed in the lower end of the storage hopper, the feed opening penetrates through the transmission layer, the first transmission gear and the wall of the second decontamination bin and is communicated with the inside of the second decontamination bin, a motor is further arranged at the upper end of the transmission layer, a first transmission stirring rod and a second transmission stirring rod are arranged inside the second decontamination bin, and a plurality of stirring blades are arranged on the first transmission stirring rod and the second transmission stirring rod, the first transmission stirring rod penetrates through the bin wall of the second decontamination bin and the output shaft extension of the second transmission gear and is fixedly connected with the motor, the first transmission stirring rod is fixedly connected with the second transmission gear, and the second transmission stirring rod penetrates through the bin wall of the second decontamination bin and is fixedly connected with the third transmission gear.
Further, first raceway on be equipped with first water pump, be equipped with the second water pump on the second raceway, the lower extreme that sprays the layer is equipped with a plurality of mouths that spray, the shower nozzle includes the shower nozzle, go up the shower nozzle and spray a mouthful spiro union fixed, the lower extreme of going up the shower nozzle is equipped with the shower nozzle filter layer, the filter is located the below that sprays the layer, the filter is located the top of scrubbing storehouse delivery port.
Further, the inside of delivery port be equipped with filter screen and valve, the filter screen is located between valve and the second scrubbing storehouse, the lower extreme of storage hopper is the toper, feed opening and first drive gear fixed connection, the lower extreme of feed opening is equipped with dispersion blanking head, the shape of dispersion blanking head is the style of calligraphy of falling V.
The invention has the beneficial effects that:
(1) the invention adds a sewage treatment agent in the sewage treatment process of printing and dyeing textile industry, the sewage treatment agent achieves the sewage treatment effect by mixing a plurality of substances, firstly, corn straws are subjected to leaf removal, segment cutting, cooking and crushing to obtain corn straw powder, the corn straw powder contains a large amount of cellulose, the cellulose has certain adsorption capacity, the cellulose in the corn straws is extracted by a nitric acid-ethanol method, the common straw treatment method is incineration, the environmental hazard is very large, the sewage treatment agent is prepared by taking the corn straws as a raw material, on one hand, the utilization rate of wastes is increased, on the other hand, the ecological environment is protected, bentonite and vermiculite are subjected to surface modification by hydrochloric acid, acid treatment enables cations such as sodium, magnesium, potassium, calcium and the like between bentonite layers to be converted into soluble salts to be dissolved out, and bond energy between the bentonite layers is weakened, the interlayer spacing is increased to form a porous active substance with a micropore grid structure and a large specific surface area, impurities distributed in channels of a bentonite structure can be removed, the pore volume is increased, the diffusion of adsorbate molecules is facilitated, vermiculite presents a porous characteristic by acid treatment, the layer structure is destroyed, the specific surface area is increased, the activity and the adsorbability are enhanced, the capability of a sewage treatment agent on treating sewage chromaticity and reducing COD is effectively enhanced, ferric chloride solution, potassium hydroxide solution and sodium hypochlorite react to prepare potassium ferrate, the potassium ferrate and aluminum sulfate further react under a low-temperature condition to form aluminum salt containing the ferrate, the substance is the ferrate, the ferrate has strong oxidizability, so that the sterilization can be performed through oxidation, the ferrate can form ferric hydroxide colloid in water, the ferric hydroxide colloid can aggregate suspended matters in the water to form precipitates, the sewage treatment agent can efficiently remove fine suspended matters in water, not only can react with water to generate ferric hydroxide, but also can generate aluminum hydroxide, and aluminum hydroxide colloid has strong adsorption capacity, can adsorb impurities suspended in water, and forms stable precipitate to clarify water, thereby further improving the treatment effect of the sewage treatment agent;
(2) the invention uses a sewage treatment device in the sewage treatment process of printing and dyeing textile industry, the sewage treatment device comprises a water storage tank, a first water delivery pipe, a first decontamination chamber, a second water delivery pipe and a second decontamination chamber, the top end of the inner part of the first decontamination chamber is provided with a spray layer, the lower end of the spray layer is provided with a plurality of spray nozzles, the spray nozzles are fixed by screw connection through an upper spray nozzle and a spray port, the replacement of the spray nozzles is convenient, the lower end of the upper spray nozzle is provided with a spray nozzle filter layer, the spray nozzle filter layer filters the suspended matters which are not completely filtered before, and then the suspended matters which are not completely filtered are further filtered by a filter plate to completely filter the insoluble pollutants in the sewage, the top end of the outer part of the second decontamination chamber is provided with a transmission layer, the upper end of the transmission layer is provided with a storage hopper, sewage treatment agent is added into the sewage under the action of gravity and centrifugal force by dispersing a lower feed, stirring vane begins to stir sewage and sewage treatment agent, and the bottom of the dispersion material bottom tray shape is for falling the V-shaped, can make sewage treatment agent homodisperse, and the time of the sewage treatment that has significantly reduced has further promoted work efficiency, carries out the interpolation of sewage treatment agent to the second scrubbing storehouse through the storage hopper, has further guaranteed that sewage can not receive secondary pollution to influence treatment effeciency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a sewage treatment apparatus according to the present invention;
FIG. 2 is a schematic view of a water storage tank of the sewage treatment apparatus according to the present invention;
FIG. 3 is a schematic structural view of a first decontamination chamber of the sewage treatment device of the present invention;
FIG. 4 is a schematic structural view of a spray layer in the sewage treatment apparatus according to the present invention;
FIG. 5 is a schematic structural view of a second decontamination chamber of the sewage treatment device of the present invention;
FIG. 6 is a schematic view of the structure of the water outlet of the sewage treatment apparatus of the present invention.
In the figure: 1. a water storage tank; 11. a water outlet of the water storage tank; 2. a first water delivery pipe; 21. a first water pump; 3. a first decontamination cabin; 31. a spray layer; 311. a spray port; 32. a spray layer water inlet; 33. a spray head; 331. an upper spray head; 332. a nozzle filter layer; 34. a filter plate; 35. a water outlet of the decontamination bin; 4. a second water delivery pipe; 41. a second water pump; 5. a second decontamination cabin; 51. a water inlet of the decontamination bin; 52. a water outlet; 521. a filter screen; 522. a valve; 6. a transmission layer; 61. a first drive gear; 62. a second transmission gear; 63. a third transmission gear; 7. a storage hopper; 71. a feeding port; 72. dispersing a blanking head; 8. an electric motor; 81. a first transmission stirring rod; 82. a second drive stirring rod; 83. a stirring blade.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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 treatment method of sewage in the printing and dyeing textile industry comprises the following specific steps:
step S1: firstly, primarily filtering the printing and dyeing textile industry sewage through a grid and a screen, and introducing the filtered printing and dyeing textile industry sewage into a first sedimentation tank to obtain primary sedimentation sewage;
step S2: introducing the primary precipitation sewage obtained in the step S1 into a second precipitation tank, adding a flocculating agent, performing secondary precipitation and filtering to obtain secondary precipitation sewage;
step S3: introducing the secondary precipitated sewage into a sewage treatment device, adding a sewage treatment agent, and performing sewage treatment to obtain treated sewage;
step S4: and (4) filtering the treated sewage obtained in the step (S3) to obtain the water which reaches the discharge standard.
The sewage treatment agent is prepared from the following raw materials in parts by weight: 25 parts of corn straw, 70 parts of deionized water, 50 parts of nitric acid-ethanol mixed solution, 13 parts of absolute ethyl alcohol, 5 parts of bentonite, 5 parts of vermiculite, 20 parts of hydrochloric acid solution, 20 parts of ferric chloride solution, 60 parts of potassium hydroxide solution, 40 parts of sodium hypochlorite solution, 13.5 parts of aluminum sulfate, 3.5 parts of polyacrylamide and 3 parts of sodium silicate;
the sewage treatment agent is prepared by the following method:
a1: removing leaves of corn straws, cutting the corn straws into small sections, cleaning the small sections with deionized water, cooking the small sections in boiling water for 1 hour, putting the cooked corn straws into an oven, drying the corn straws at the temperature of 100 ℃, crushing the dried corn straws, sieving the crushed corn straws with a 60-mesh sieve, adding the corn straw powder and a nitric acid-ethanol mixed solution into a reaction kettle, heating the mixed solution in a boiling water bath until the corn straw powder turns white, washing the mixed solution twice with absolute ethyl alcohol, performing suction filtration, putting the suction-filtered corn straw powder into the oven, and drying the mixed solution at the temperature of 80 ℃ to prepare first solid powder;
a2: adding bentonite, vermiculite and hydrochloric acid solution into a reaction kettle, stirring for 4 hours at the rotation speed of 500r/min and the temperature of 80 ℃, filtering, removing filtrate, washing twice with deionized water, and drying at the temperature of 100 ℃ to obtain second solid powder;
a3: adding a ferric chloride solution, a potassium hydroxide solution and a sodium hypochlorite solution into a reaction kettle, stirring for 1h at the rotation speed of 300r/min and the temperature of 25 ℃, filtering, drying at the temperature of 100 ℃ to obtain third solid powder, adding the third solid powder, aluminum sulfate and deionized water into the reaction kettle, stirring for 3h at the rotation speed of 300r/min and the temperature of 1 ℃, filtering, removing filtrate, and drying at the temperature of 100 ℃ to obtain fourth solid powder;
a4: and (3) adding the first solid powder prepared in the step A1, the second solid powder prepared in the step A2, the fourth solid powder prepared in the step A3, polyacrylamide and sodium silicate into a ball mill, performing ball milling for 40min under the condition that the rotating speed is 20r/min, and sieving by using a 80-mesh sieve to prepare the sewage treatment agent.
Example 2
A treatment method of sewage in the printing and dyeing textile industry comprises the following specific steps:
step S1: firstly, primarily filtering the printing and dyeing textile industry sewage through a grid and a screen, and introducing the filtered printing and dyeing textile industry sewage into a first sedimentation tank to obtain primary sedimentation sewage;
step S2: introducing the primary precipitation sewage obtained in the step S1 into a second precipitation tank, adding a flocculating agent, performing secondary precipitation and filtering to obtain secondary precipitation sewage;
step S3: introducing the secondary precipitated sewage into a sewage treatment device, adding a sewage treatment agent, and performing sewage treatment to obtain treated sewage;
step S4: and (4) filtering the treated sewage obtained in the step (S3) to obtain the water which reaches the discharge standard.
The sewage treatment agent is prepared from the following raw materials in parts by weight: 30 parts of corn straw, 90 parts of deionized water, 60 parts of nitric acid-ethanol mixed solution, 20 parts of absolute ethyl alcohol, 8 parts of bentonite, 8 parts of vermiculite, 30 parts of hydrochloric acid solution, 25 parts of ferric chloride solution, 80 parts of potassium hydroxide solution, 50 parts of sodium hypochlorite solution, 15 parts of aluminum sulfate, 5 parts of polyacrylamide and 5 parts of sodium silicate;
the sewage treatment agent is prepared by the following method:
a1: removing leaves of corn straws, cutting the corn straws into small sections, cleaning the small sections with deionized water, cooking the small sections in boiling water for 2 hours, putting the cooked corn straws into a drying oven, drying the corn straws at the temperature of 110 ℃, crushing the dried corn straws, sieving the crushed corn straws with a 80-mesh sieve, adding the corn straw powder and a nitric acid-ethanol mixed solution into a reaction kettle, heating the mixed solution in a boiling water bath until the corn straw powder turns white, washing the mixed solution twice with absolute ethyl alcohol, performing suction filtration, putting the suction-filtered corn straw powder into the drying oven, and drying the mixed solution at the temperature of 100 ℃ to prepare first solid powder;
a2: adding bentonite, vermiculite and hydrochloric acid solution into a reaction kettle, stirring for 5 hours at the rotation speed of 800r/min and the temperature of 90 ℃, filtering, removing filtrate, washing twice with deionized water, and drying at the temperature of 110 ℃ to obtain second solid powder;
a3: adding a ferric chloride solution, a potassium hydroxide solution and a sodium hypochlorite solution into a reaction kettle, stirring for 2 hours at the rotation speed of 500r/min and the temperature of 30 ℃, filtering, drying at the temperature of 110 ℃ to obtain third solid powder, adding the third solid powder, aluminum sulfate and deionized water into the reaction kettle, stirring for 5 hours at the rotation speed of 500r/min and the temperature of 5 ℃, filtering, removing filtrate, and drying at the temperature of 110 ℃ to obtain fourth solid powder;
a4: and (3) adding the first solid powder prepared in the step A1, the second solid powder prepared in the step A2, the fourth solid powder prepared in the step A3, polyacrylamide and sodium silicate into a ball mill, performing ball milling for 50min under the condition that the rotating speed is 30r/min, and sieving by using a 100-mesh sieve to prepare the sewage treatment agent.
Comparative example 1
Compared with the embodiment 1, the sewage treatment agent is replaced by the polyacrylamide, and the concrete operation steps are as follows:
step S1: firstly, primarily filtering the printing and dyeing textile industry sewage through a grid and a screen, and introducing the filtered printing and dyeing textile industry sewage into a first sedimentation tank to obtain primary sedimentation sewage;
step S2: introducing the primary precipitation sewage obtained in the step S1 into a second precipitation tank, adding a flocculating agent, performing secondary precipitation and filtering to obtain secondary precipitation sewage;
step S3: introducing the secondary precipitation sewage into a sewage treatment device, adding polyacrylamide, and performing sewage treatment to obtain treated sewage;
step S4: and (4) filtering the treated sewage obtained in the step (S3) to obtain the water which reaches the discharge standard.
Comparative example 2
Compared with the embodiment 1, the method for preparing the sewage treatment agent by using the polyaluminium chloride has the following specific operation steps:
step S1: firstly, primarily filtering the printing and dyeing textile industry sewage through a grid and a screen, and introducing the filtered printing and dyeing textile industry sewage into a first sedimentation tank to obtain primary sedimentation sewage;
step S2: introducing the primary precipitation sewage obtained in the step S1 into a second precipitation tank, adding a flocculating agent, performing secondary precipitation and filtering to obtain secondary precipitation sewage;
step S3: introducing the secondary precipitation sewage into a sewage treatment device, adding polyaluminium chloride, and performing sewage treatment to obtain treated sewage;
step S4: and (4) filtering the treated sewage obtained in the step (S3) to obtain the water which reaches the discharge standard.
Comparative example 3
The comparative example is the current commonly used method for treating the sewage in the printing and dyeing textile industry.
The sewage treated by the examples 1-2 and the comparative examples 1-3 is detected, and the detection structure is shown in the following table 1, wherein the unit is mg/L, and the chroma and the pH value are excluded;
TABLE 1
| COD | SOD | SS | Color intensity | Sulfide compound | pH | |
| Sewage water sample | 4350 | 523 | 382 | 980 | 58 | 12.3 |
| Example 1 | 42 | 8 | 18 | 8 | 0.2 | 7.2 |
| Example 2 | 46 | 7 | 14 | 6 | 0.3 | 6.9 |
| Comparative example 1 | 675 | 81 | 59 | 236 | 10.8 | 9.6 |
| Comparative example 2 | 732 | 76 | 82 | 192 | 13.7 | 10.8 |
| Comparative example 3 | 132 | 23 | 54 | 35 | 2.6 | 8.5 |
As can be seen from Table 1 above, the contents of each pollutant in the sewage treated in examples 1-2 are less than those in the sewage treated in comparative examples 1-3, and in the present invention, a sewage treatment agent is added in the sewage treatment, which contains a substance having a large specific surface area and enhanced activity and adsorptivity, is effective for enhancing the ability of the sewage treatment agent to treat the chromaticity of the sewage and reduce COD, and contains an aluminum salt containing ferrate, and is also ferrate, which has strong oxidizing property and is therefore capable of disinfecting by oxidation, the ferrate forms an iron hydroxide colloid in the water, the iron hydroxide colloid is capable of aggregating suspended matters in the water to form a precipitate, and is capable of efficiently removing fine suspended matters in the water, and the sewage treatment agent not only reacts with water to produce iron hydroxide but also produces aluminum hydroxide, the aluminum hydroxide colloid has strong adsorption capacity, can adsorb impurities suspended in water and form precipitates, so that the water is clarified, and the treatment effect of the sewage treatment agent is further improved.
Referring to fig. 1-6, the sewage treatment apparatus used in the above embodiment includes a water storage tank 1, a first water pipe 2, a first decontamination chamber 3, a second water pipe 4, and a second decontamination chamber 5, wherein a water storage tank water outlet 11 is formed at a bottom end of one side of the water storage tank 1, a spraying layer 31 is arranged at a top end of the inside of the first decontamination chamber 3, a spraying layer water inlet 32 is formed at an upper end of the spraying layer 31, the spraying layer water inlet 32 penetrates through a chamber wall of the first decontamination chamber 3, one end of the first water pipe 2 is fixedly connected with the water storage tank water outlet 11, the other end of the first water pipe 2 is fixedly connected with the spraying layer water inlet 32, a plurality of spray nozzles 33 are arranged at a lower end of the spraying layer 31, a filter plate 34 is further arranged inside the first decontamination chamber 3, and a decontamination chamber water outlet 35 is formed at a bottom end of one side of the;
a decontamination bin water inlet 51 is formed in the top end of one side of the second decontamination bin 5, a water outlet 52 is formed in the bottom end of one side of the second decontamination bin 5, a transmission layer 6 is arranged on the top end of the outside of the second decontamination bin 5, a first transmission gear 61, a second transmission gear 62 and a third transmission gear 63 are arranged in the transmission layer 6, the second transmission gear 62 and the third transmission gear 63 are respectively positioned on two sides of the first transmission gear 61, the first transmission gear 61 is meshed with the second transmission gear 62, the first transmission gear 61 is meshed with the third transmission gear 63, a storage hopper 7 is arranged at the upper end of the transmission layer 6, a feed opening 71 is formed in the lower end of the storage hopper 7, the feed opening 71 penetrates through the transmission layer 6, the first transmission gear 61 and the bin wall of the second decontamination bin 5, the feed opening 71 is communicated with the inside of the second decontamination bin 5, a motor 8 is further arranged at the upper end of the transmission layer 6, a first transmission stirring rod 81 and a second transmission stirring rod 82 are arranged in the second decontamination bin 5, a plurality of stirring blades 83 are arranged on the first transmission stirring rod 81 and the second transmission stirring rod 82, the first transmission stirring rod 81 penetrates through the bin wall of the second decontamination bin 5 and the second transmission gear 62 to be fixedly connected with the output shaft of the motor 8, the first transmission stirring rod 81 is fixedly connected with the second transmission gear 62, and the second transmission stirring rod 82 penetrates through the bin wall of the second decontamination bin 5 to be fixedly connected with the third transmission gear 63.
Be equipped with first water pump 21 on the first raceway 2, be equipped with second water pump 41 on the second raceway 4, the lower extreme that sprays layer 31 is equipped with a plurality of mouths 311 that spray, and shower nozzle 33 includes shower nozzle 331, and it is fixed with the mouth 311 spiro union to go up shower nozzle 331, and the lower extreme of going up shower nozzle 331 is equipped with shower nozzle filter layer 332, and filter 34 is located the below that sprays layer 31, and filter 34 is located the top of scrubbing storehouse delivery port 35.
The inside of delivery port 52 is equipped with filter screen 521 and valve 522, and filter screen 521 is located between valve 522 and the second scrubbing storehouse 5, and the lower extreme of storage hopper 7 is the toper, feed opening 71 and first drive gear 61 fixed connection, and the lower extreme of feed opening 71 is equipped with dispersion blanking head 72, and dispersion blanking head 72's shape is the style of calligraphy of falling V.
The working principle is as follows: introducing secondary precipitated sewage into the water storage tank 1, turning on the first water pump 21, enabling the secondary precipitated sewage to enter the spraying layer 31 along the first water delivery pipe 2, filtering out partial suspended matters in the secondary precipitated sewage under the action of the spray head filtering layer 332, simultaneously entering the first decontamination cabin 3 in a spraying mode, completely filtering out the suspended matters in the secondary precipitated sewage under the action of the filtering plate 34, fixing the upper spray head 331 with the spraying opening 311 in a threaded mode, facilitating the replacement of the spray head 33, enabling the secondary precipitated sewage to fall to the bottom of the first decontamination cabin 3, turning on the second water pump 41, enabling the secondary precipitated sewage to enter the second decontamination cabin 5 from the decontamination cabin water outlet 35 along the second water delivery pipe 4, turning on the motor 8, enabling the first transmission stirring rod 81 to start stirring, simultaneously turning the second transmission gear 62 to drive the first transmission gear 61 to rotate, and the first transmission gear 61 to drive the third transmission gear 63 to rotate, make second transmission puddler 82 begin to stir, storage hopper 7 begins to rotate, add the sewage treatment agent in the storage hopper 7, the sewage treatment agent adds the secondary through stub bar 72 under gravity and centrifugal force effect and deposits in the sewage, simultaneously under the effect of first transmission puddler 81 and second transmission puddler 82, stirring vane 83 begins to deposit sewage and sewage treatment agent to the secondary and stir, stub bar 72 can make sewage treatment agent homodisperse under the dispersion, greatly reduced sewage treatment's time, work efficiency has been promoted, carry out the interpolation of sewage treatment agent to second scrubbing storehouse through the storage hopper, further guaranteed that sewage can not receive secondary pollution, thereby influence treatment efficiency, after the stirring is abundant, open valve 522 secondary and deposit sewage and filter through filter screen 521, obtain the sewage after handling.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (8)
1. A treatment method of printing and dyeing textile industry sewage is characterized in that: the method for treating the printing and dyeing textile industry sewage comprises the following specific steps:
step S1: firstly, primarily filtering the printing and dyeing textile industry sewage through a grid and a screen, and introducing the filtered printing and dyeing textile industry sewage into a first sedimentation tank to obtain primary sedimentation sewage;
step S2: introducing the primary precipitation sewage obtained in the step S1 into a second precipitation tank, adding a flocculating agent, performing secondary precipitation and filtering to obtain secondary precipitation sewage;
step S3: introducing the secondary precipitated sewage into a sewage treatment device, adding a sewage treatment agent, and performing sewage treatment to obtain treated sewage;
step S4: and (4) filtering the treated sewage obtained in the step (S3) to obtain the water which reaches the discharge standard.
2. The method for treating sewage of printing and dyeing textile industry according to claim 1, wherein the method comprises the following steps: the flocculating agent is one or a mixture of more of aluminum sulfate, aluminum chloride, ferric sulfate and ferric chloride in any proportion.
3. The method for treating sewage of printing and dyeing textile industry according to claim 1, wherein the method comprises the following steps: the sewage treatment agent in the step S3 is prepared from the following raw materials in parts by weight: 25-30 parts of corn straw, 70-90 parts of deionized water, 50-60 parts of nitric acid-ethanol mixed solution, 13-20 parts of absolute ethyl alcohol, 5-8 parts of bentonite, 5-8 parts of vermiculite, 20-30 parts of hydrochloric acid solution, 20-25 parts of ferric chloride solution, 60-80 parts of potassium hydroxide solution, 40-50 parts of sodium hypochlorite solution, 13.5-15 parts of aluminum sulfate, 3.5-5 parts of polyacrylamide and 3-5 parts of sodium silicate;
the sewage treatment agent is prepared by the following method:
a1: removing leaves of corn straws, cutting the corn straws into small sections, cleaning the small sections by using deionized water, cooking the small sections in boiling water for 1 to 2 hours, putting the cooked corn straws into an oven, drying the small sections at the temperature of 100 ℃ plus 110 ℃, crushing the dried corn straws, sieving the crushed corn straws with a 60 to 80-mesh sieve, adding the corn straw powder and a nitric acid-ethanol mixed solution into a reaction kettle, heating the mixed solution in a boiling water bath until the corn straw powder turns white, washing the mixed solution twice by using absolute ethyl alcohol, performing suction filtration, putting the filtered corn straw powder into the oven, and drying the filtered corn straw powder at the temperature of 80 to 100 ℃ to prepare first solid powder;
a2: adding bentonite, vermiculite and hydrochloric acid solution into a reaction kettle, stirring for 4-5h at the rotation speed of 500-800r/min and the temperature of 80-90 ℃, filtering, removing filtrate, washing twice with deionized water, and drying at the temperature of 100-110 ℃ to obtain second solid powder;
a3: adding an iron chloride solution, a potassium hydroxide solution and a sodium hypochlorite solution into a reaction kettle, stirring for 1-2h at the rotation speed of 300-plus-500 r/min and the temperature of 25-30 ℃, filtering, drying at the temperature of 100-plus-110 ℃ to obtain third solid powder, adding the third solid powder, aluminum sulfate and deionized water into the reaction kettle, stirring for 3-5h at the rotation speed of 300-plus-500 r/min and the temperature of 1-5 ℃, filtering, removing filtrate, and drying at the temperature of 100-plus-110 ℃ to obtain fourth solid powder;
a4: and (3) adding the first solid powder prepared in the step A1, the second solid powder prepared in the step A2, the fourth solid powder prepared in the step A3, polyacrylamide and sodium silicate into a ball mill, performing ball milling for 40-50min under the condition that the rotating speed is 20-30r/min, and sieving by using a sieve of 80-100 meshes to prepare the sewage treatment agent.
4. The method for treating sewage of printing and dyeing textile industry according to claim 3, wherein the method comprises the following steps: the dosage ratio of the concentrated nitric acid to the ethanol in the nitric acid-ethanol mixed solution is 1: 4, the mass fraction concentration of the concentrated nitric acid is 65-69%, the mass concentration of the hydrochloric acid solution is 1-1.5mol/L, the mass concentration of the ferric chloride solution is 0.02-0.05mol/L, the mass concentration of the potassium hydroxide solution is 3-5mol/L, and the mass fraction concentration of the sodium hypochlorite solution is 9.5-10%.
5. The method for treating sewage of printing and dyeing textile industry according to claim 3, wherein the method comprises the following steps: the using ratio of the deionized water obtained in the step A1, the deionized water obtained in the step A2 and the deionized water obtained in the step A3 is 5: 5: 1.
6. the method for treating sewage of printing and dyeing textile industry according to claim 1, wherein the method comprises the following steps: the sewage treatment device in the step S3 comprises a water storage tank (1), a first water delivery pipe (2) and a first decontamination bin (3), the device comprises a second water conveying pipe (4) and a second decontamination bin (5), wherein a water storage tank water outlet (11) is formed in the bottom end of one side of a water storage tank (1), a spraying layer (31) is arranged at the top end of the inside of a first decontamination bin (3), a spraying layer water inlet (32) is formed in the upper end of the spraying layer (31), the spraying layer water inlet (32) penetrates through the bin wall of the first decontamination bin (3), one end of a first water conveying pipe (2) is fixedly connected with the water storage tank water outlet (11), the other end of the first water conveying pipe (2) is fixedly connected with the spraying layer water inlet (32), a plurality of spray nozzles (33) are arranged at the lower end of the spraying layer (31), a filter plate (34) is further arranged inside the first decontamination bin (3), and a decontamination bin water outlet (35) is formed in the bottom end of one side of the first decontamination;
a sewage removing bin water inlet (51) is formed in the top end of one side of the second sewage removing bin (5), a water outlet (52) is formed in the bottom end of one side of the second sewage removing bin (5), a transmission layer (6) is arranged at the top end of the outer portion of the second sewage removing bin (5), a first transmission gear (61), a second transmission gear (62) and a third transmission gear (63) are arranged in the transmission layer (6), the second transmission gear (62) and the third transmission gear (63) are respectively located on two sides of the first transmission gear (61), the first transmission gear (61) is meshed with the second transmission gear (62), the first transmission gear (61) is meshed with the third transmission gear (63), a storage hopper (7) is arranged at the upper end of the transmission layer (6), a discharging opening (71) is formed in the lower end of the storage hopper (7), and the discharging opening (71) penetrates through the transmission layer (6), the first transmission gear (61) and the bin wall of the second sewage removing bin (5), feed opening (71) and the inside intercommunication in second scrubbing storehouse (5), the upper end of drive layer (6) still is equipped with motor (8), the inside in second scrubbing storehouse (5) is equipped with first transmission puddler (81) and second transmission puddler (82), be equipped with a plurality of stirring vane (83) on first transmission puddler (81) and second transmission puddler (82), bulkhead and second drive gear (62) that first transmission puddler (81) passed second scrubbing storehouse (5) and the output shaft of motor (8) stretch fixed connection, first transmission puddler (81) and second drive gear (62) fixed connection, bulkhead and third drive gear (63) fixed connection that second transmission puddler (82) passed second scrubbing storehouse (5).
7. The method for treating sewage of printing and dyeing textile industry according to claim 6, wherein the method comprises the following steps: first raceway (2) on be equipped with first water pump (21), be equipped with second water pump (41) on second raceway (4), the lower extreme that sprays layer (31) is equipped with a plurality of mouths (311) that spray, shower nozzle (33) are including last shower nozzle (331), it is fixed with mouth (311) spiro union to go up shower nozzle (331) and spray, the lower extreme that goes up shower nozzle (331) is equipped with shower nozzle filter layer (332), filter (34) are located the below that sprays layer (31), filter (34) are located the top of scrubbing storehouse delivery port (35).
8. The method for treating sewage of printing and dyeing textile industry according to claim 6, wherein the method comprises the following steps: the inside of delivery port (52) be equipped with filter screen (521) and valve (522), filter screen (521) are located between valve (522) and the second scrubbing storehouse (5), the lower extreme of storage hopper (7) is the toper, feed opening (71) and first drive gear (61) fixed connection, the lower extreme of feed opening (71) is equipped with dispersion blanking head (72), the shape of dispersion blanking head (72) is the style of calligraphy of falling V.
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