CN108658375B - Reaction tank and method for treating printing and dyeing wastewater by adopting same - Google Patents

Reaction tank and method for treating printing and dyeing wastewater by adopting same Download PDF

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CN108658375B
CN108658375B CN201810480157.7A CN201810480157A CN108658375B CN 108658375 B CN108658375 B CN 108658375B CN 201810480157 A CN201810480157 A CN 201810480157A CN 108658375 B CN108658375 B CN 108658375B
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water
tank
water body
stainless steel
discharging
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CN108658375A (en
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张伟
薛中
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Zhejiang Qiushi New Material Co Ltd
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Zhejiang Qiushi New Material Co Ltd
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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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • 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
    • 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
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • 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
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

The invention discloses a reaction tank and a method for treating printing and dyeing wastewater by adopting the same, belonging to the technical field of printing and dyeing water treatment and having the technical key points that: the utility model provides a reaction tank, includes the cell body, sets up inlet tube and the drain pipe in the cell body both sides, the cell body is followed the inlet tube and is equipped with a plurality of layers of step toward the downward sloping of drain pipe direction, every layer all the kickup is equipped with a plurality of arc stainless steel separation blades on the step. The method for treating the printing and dyeing wastewater comprises the steps of primary heat dissipation, suspended matter removal, air floatation, primary precipitation, oxidative decomposition and secondary precipitation, and then the wastewater can be discharged into a municipal pipe network or can be used as domestic water. The invention improves the oxygen content in the water body and accelerates the acid-base neutralization reaction rate of the printing and dyeing wastewater; the treatment method can reduce the content of organic matters in the water body, improve the oxygen content of the water body, and is beneficial to protecting the environment and improving the water quality.

Description

Reaction tank and method for treating printing and dyeing wastewater by adopting same
Technical Field
The invention belongs to the technical field of printing and dyeing water treatment, and particularly relates to a reaction tank and a method for treating printing and dyeing wastewater by using the same.
Background
In the textile printing and dyeing process, the dye vat is a large vat used for dyeing yarns, and can be used for dyeing yarns or cloth and post finishing and shaping equipment. When the water is used for dyeing dark cloth or yarn, the requirement on water quality is relatively low, and the used dyeing water only needs to remove the color in the dyeing wastewater (namely raw water) and remove dye molecules and suspended impurities, but does not need to be subjected to thorough purification treatment.
At present, when acid-base neutralization reaction is carried out in the existing reaction tank, a stirring paddle is generally adopted for stirring so as to promote the reaction to be rapidly carried out, wherein the stirring paddle is vertically arranged in the reaction tank, and meanwhile, the stirring paddle is positioned in the reaction tank, so that the stirring paddle can be driven to stir when a motor is started. However, the stirring paddle only can play a role in mixing and stirring so as to accelerate the orderly progress of the acid-base neutralization reaction. Not only the effect is single, but also the stirring paddle can only rotate along one direction (namely clockwise or anticlockwise) during mixing, and the effect of the auxiliary agent is not good during mixing, so a new technical scheme needs to be provided to solve the problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a reaction tank, which improves the oxygen content in a water body and accelerates the acid-base neutralization reaction rate of printing and dyeing wastewater.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a reaction tank, includes the cell body, sets up inlet tube and the drain pipe in the cell body both sides, the cell body is followed the inlet tube and is equipped with a plurality of layers of step toward the downward sloping of drain pipe direction, every layer all the kickup is equipped with a plurality of arc stainless steel separation blades on the step.
Through adopting above-mentioned technical scheme, according to natural rule water body can follow the height and flow to low, water (water finger print dyeing waste water) can follow water inlet pipe mouth direction flow direction drain pipe mouth department this moment, and the water can make the water acceleration rate after overcoming the difference in height when downflow, through set up the arc stainless steel separation blade on the step, the normal flow of water can be blockked in the existence of arc stainless steel separation blade, the effect that slows down or obstruct not only can change the direction and the speed that the water flows, but also can produce the torrent phenomenon in arc stainless steel baffle department, from this can improve the internal oxygen content of water, still help improving the speed of acid-base neutralization reaction in the water simultaneously.
The invention is further configured to: the arc-shaped stainless steel retaining pieces are arranged on the same layer of the step in a staggered mode at intervals.
By adopting the technical scheme, the phenomenon that the water body generates turbulence at the arc-shaped stainless steel baffle is further increased, so that the oxygen content in the water body can be improved, and the speed of acid-base neutralization reaction in the water body can be improved.
The invention is further configured to: the lower end of the arc-shaped stainless steel baffle is hinged to the turning position of the step through a rotating shaft, and a torsion spring used for driving the arc-shaped stainless steel baffle to move towards the water inlet pipe is sleeved on the rotating shaft.
Through adopting above-mentioned technical scheme, installation arc stainless steel separation blade in the turn department of step, the effect that blocks of other arc stainless steel separation blades has on the one hand, on the other hand when the water gravity of arc stainless steel baffle department is greater than the torsional force of torsional spring, elastic deformation takes place for the torsional spring, arc stainless steel baffle can overturn downwards around the pivot at this moment in order to let out unnecessary water body, reverse upset under the effect of torsional spring after that, and at the in-process of above-mentioned upset, arc stainless steel baffle can produce transverse vibration, thereby can produce the shock in the flow direction of water, and then help accelerating going on of acid-base neutralization reaction in the water.
The invention is further configured to: the left side and the right side of the arc-shaped stainless steel baffle plate are provided with baffle plates.
Through adopting above-mentioned technical scheme, the existence of baffle can increase the discharge that arc stainless steel baffle held back for arc stainless steel baffle is more convenient and effective when overturning downwards round the pivot, thereby has increased the shock of water, and then has accelerated going on of acid-base neutralization reaction in the water, has improved reaction efficiency.
The invention is further configured to: the water inlet pipe is provided with a dosing box, the lower end of the dosing box is provided with a dosing pipe, and the lower end of the dosing pipe extends downwards into the water inlet pipe.
Through adopting above-mentioned technical scheme, not only made things convenient for the operator to add the medicine fast, but also can accelerate medicine flash mixed in the water, improved the mixing efficiency of water.
Aiming at the defects in the prior art, the invention aims to provide a method for treating printing and dyeing wastewater by using the reaction tank, which reduces the content of organic matters in a water body, improves the oxygen content of the water body, and is beneficial to protecting the environment and improving the water quality.
In order to achieve the purpose, the invention provides the following technical scheme: a method for treating printing and dyeing wastewater by adopting the reaction tank, which comprises the following operation steps,
step S1, discharging the printing and dyeing wastewater into a raw water tank through a dye vat sewage discharge pipe for primary heat dissipation, and detecting and recording the pH value of the raw water;
step S2, discharging the water body after the preliminary heat dissipation in the raw water pool into a barrier water collecting well, and discharging the water body after the suspended matters are removed into an adjusting pool for temporary storage;
s3, lifting the water body in the adjusting tank into an air floatation tank through a water pump, adding a polyferric flocculant and dilute sulfuric acid, adjusting the pH value to 5-6.5, and removing surface suspended matters through a mud scraper after full aeration;
step S4, enabling the lower layer clear liquid obtained in the step S3 to flow into a reaction tank through a water inlet pipe, adding lime water to adjust the pH value to be about 7, and discharging the mixture into a primary sedimentation tank for primary sedimentation;
s5, discharging the water body in the step S4 into an aerobic tank through a water pump, and decomposing, adsorbing and condensing organic matters in the water body under the action of aerobic bacteria after continuous aeration;
s6, discharging the water body obtained in the step S5 into a secondary sedimentation tank through a water pump for sedimentation treatment again;
s7, sampling a water body in the secondary sedimentation tank to detect the COD content, and discharging a part of water body into a reuse tank to be used as domestic water when the COD content is below 120; the other part is discharged into a municipal pipe network and is treated again by a combined sewage treatment plant, and the qualified sewage is discharged into the sea.
By adopting the technical scheme, when the water body (namely the printing and dyeing wastewater) is subjected to dyeing treatment in the dye vat, the temperature is higher, so that the water body needs to be radiated when being discharged into the raw water tank, and a condition is created for improving the oxygen content in the water body; and then adding the polyferric flocculant and the dilute sulfuric acid to enable the pH to be about 5-6.5, and simultaneously fully aerating, so that on one hand, the oxygen content in the water body can be improved, on the other hand, the polyferric flocculant and the dilute sulfuric acid can be fully mixed in the water body, the effects of removing COD, BOD, heavy metal ions and the like in the water body are remarkable, and the effects of degerming, decoloring, deodorizing and the like are achieved. And then, adding lime water, carrying out acid-base neutralization reaction, neutralizing acid and base to generate salt, and depositing in a primary sedimentation tank. Then the upper water body is discharged into an aerobic tank through a pipeline, organic matters are further decomposed under the action of the bacteria, and water-soluble salt is converted into water-insoluble salt, so that the purposes of upper and lower layering and solid-liquid separation can be achieved through sedimentation. Not only is convenient, but also can reduce the content of organic matters in the water body, improve the oxygen content of the water body, and is beneficial to protecting the environment and improving the water quality.
The invention is further configured to: suspended matters intercepted by the barrier water collecting well are conveyed into a plate and frame filter press by a conveying pump to be compressed; and the sludge generated in the air floatation tank, the primary sedimentation tank and the secondary sedimentation tank is conveyed into the sludge tank by a sludge pump for temporary storage and then conveyed into a plate and frame filter press by a lifting pump for compression treatment.
By adopting the technical scheme, suspended matters intercepted by the barrier water collecting well are directly conveyed into the plate-and-frame filter press for compression treatment, at the moment, the dewatered water directly falls onto the ground from the lower part of the plate-and-frame filter press, and then an operator can use a forklift to load and transport the dry sludge to a thermal power plant for incineration; and the water body obtained by filter pressing flows into the raw water pool or the regulating pool again through the pipeline for subsequent treatment.
In addition, the water body after administering needs to wait that mud deposits in a large number in the bottom in corresponding pond, and operator's accessible sludge pump carries the mud pond in and concentrates this moment, and the upper water can flow into next pond and administer once more, not only can improve the efficiency that the water was administered from this, but also can reduce a large amount of repetition to the water and administer, has improved the speed and the efficiency of administering greatly.
The invention is further configured to: and water subjected to filter pressing in the plate frame filter press is discharged back into the raw water tank through a pipeline, and the residual sludge is conveyed to a thermal power plant through a forklift for incineration.
By adopting the technical scheme, the sludge (drier) obtained after the sludge is subjected to filter pressing and dewatering by the plate and frame filter press is incinerated, so that the sludge in the water body can be removed, and the device is very convenient and labor-saving.
The invention is further configured to: in step S4, the water temperature is higher than or equal to 35 ℃ in high-temperature weather, at this time, the water body after acid-base neutralization treatment in the reaction tank is cooled to 20-35 ℃ by a cooling tower and then discharged into a primary sedimentation tank for primary sedimentation treatment.
Because the aerobic bacteria in the aerobic tank can normally grow at the temperature of 15-35 ℃ and are the optimal survival temperature of the good-sample bacteria at the temperature of 20-30 ℃, if the temperature is higher than 35 ℃ in summer, the activity of the good-sample bacteria is affected, and thus, the biochemical reaction is slower to carry out and even does not occur. Therefore, by adopting the technical scheme, the water body in the primary sedimentation tank is firstly cooled by the cooling tower, so that the water temperature is kept below 35 ℃, the normal operation of the reaction is ensured, meanwhile, the oxygen content of the water body is improved, and the method is very practical.
The invention is further configured to: in step S7, the upper layer liquid of the water body precipitated by the secondary sedimentation tank is discharged into the reuse tank after being filtered by the filter, and the lower layer liquid is discharged into the raw water tank for retreatment.
Because the water in the secondary sedimentation tank is conveyed to the recycling tank through the pipeline, more sediments can exist in the water, so that by adopting the technical scheme, the water treated in the secondary sedimentation tank is firstly put into the filter for filtering treatment, then more impurities or soil are precipitated in the lower-layer liquid, and the water is treated again by being discharged into the raw water tank. In addition, the upper liquid is discharged into the reuse tank to be used as domestic water, such as car washing, flower watering or floor cleaning and the like, so that the use is very convenient.
In conclusion, the invention has the following beneficial effects:
1. the invention improves the oxygen content in the water body and accelerates the acid-base neutralization reaction rate of the printing and dyeing wastewater;
2. the treatment method can reduce the content of organic matters in the water body, improve the oxygen content of the water body, and is beneficial to protecting the environment and improving the water quality;
3. through setting up the baffle, increase the discharge that arc stainless steel baffle held back for arc stainless steel baffle is more convenient and effective when overturning downwards round the pivot, thereby has increased the shock of water, and then has accelerated going on of acid-base neutralization reaction in the water, has improved reaction efficiency.
Drawings
FIG. 1 is a process flow diagram of a method for treating printing and dyeing wastewater by using the reaction tank;
FIG. 2 is a perspective view of the reactor of this embodiment 1, which is mainly used to show the relative position relationship between the arc-shaped stainless steel baffle and the step in the reaction tank;
FIG. 3 is an enlarged view of A in FIG. 2, which is mainly used for showing the relative position relationship between the step and the arc-shaped stainless steel baffle plate positioned on the step;
FIG. 4 is a cross-sectional view of the present embodiment 1, which is mainly used to show the shapes of the water inlet pipe, the water outlet pipe, the step, the arc-shaped stainless steel baffle and the relative position relationship between the two;
FIG. 5 is a perspective view of the reactor of this embodiment 2, which is mainly used to show the relative position relationship between the arc-shaped stainless steel baffle and the step in the reaction tank;
fig. 6 is an enlarged view of B in fig. 5, which is mainly used for showing the relative positions and connection relations among the arc-shaped stainless steel baffle plate, the rotating shaft, the torsion spring and the baffle plate on each step.
Description of the drawings: 1. a tank body; 2. a water inlet pipe; 3. a drain pipe; 4. a step; 5. an arc-shaped stainless steel baffle plate; 6. a rotating shaft; 7. a torsion spring; 8. a baffle plate; 9. a dosing box; 10. a medicine feeding pipe; 11. a raw water pool; 12. a grid sump; 13. a regulating tank; 14. an air floatation tank; 15. a reaction tank; 16. a primary sedimentation tank; 17. an aerobic tank; 18. a secondary sedimentation tank; 19. a plate-and-frame filter press; 20. a sludge tank; 21. a cooling tower; 22. a filter; 23. and (7) a recycling pool.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The established examples 1-2 were treated according to the method of the invention. The specific operation is as follows: step S1, discharging the printing and dyeing wastewater into a raw water pool 11 through a dye vat sewage discharge pipe for primary heat dissipation, and simultaneously detecting and recording the pH value of raw water;
step S2, discharging the primarily radiated water body in the raw water tank 11 into the barrier water collecting well 12, and discharging the water body with suspended matters removed into the regulating tank 13 for temporary storage;
s3, lifting the water body in the adjusting tank 13 into the air floatation tank 14 through a water pump, adding a polyferric flocculant and dilute sulfuric acid, adjusting the pH value to 5-6.5, and removing surface suspended matters through a mud scraper after full aeration;
step S4, enabling the lower layer clear liquid obtained in the step S3 to flow into a reaction tank 15 through a water inlet pipe 2, adding lime water to adjust the pH value to about 7, and discharging the mixture into a primary sedimentation tank 16 for primary sedimentation;
s5, discharging the water body in the step S4 into an aerobic tank 17 through a water pump, and decomposing, adsorbing and condensing organic matters in the water body under the action of aerobic bacteria after continuous aeration;
step S6, discharging the water body obtained in the step S5 into a secondary sedimentation tank 18 through a water pump for sedimentation treatment again;
step S7, sampling the water in the secondary sedimentation tank 18 to detect the COD content, and discharging a part of water into the reuse tank 23 to be used as domestic water when the COD content is below 120; the other part is discharged into a municipal pipe network and is treated again by a combined sewage treatment plant, and the qualified sewage is discharged into the sea.
Example 1: a reaction tank 15, as shown in fig. 1 and 2, comprises a tank body 1, a water inlet pipe 2 and a water outlet pipe 3 arranged at two sides of the tank body 1. Wherein, cell body 1 is from inlet tube 2 toward 3 direction downward sloping of drain pipe and be equipped with seven layers of steps 4, all upwards bends on every layer of step 4 and installs a plurality of arc stainless steel separation blades 5, and wherein the cross-section of arc stainless steel separation blade 5 is the arc shape (see fig. 4). And the arc-shaped stainless steel baffle plates 5 are arranged on the same layer of step 4 in a staggered mode at intervals. From this water (i.e. fingerprint dyeing waste water) can follow 2 mouthfuls of direction flow direction drain pipes 3 mouthfuls of inlet tube, and the water can make the water acceleration rate after having overcome the difference in height when downflow, through set up arc stainless steel separation blade 5 on step 4, the normal flow of water can be blockked in the existence of arc stainless steel separation blade 5, the effect of slowing down or hindering not only can change the direction and the speed that the water flows, but also can produce the torrent phenomenon in 8 departments of arc stainless steel baffle, the oxygen content in the water has further been improved, still help improving the speed of acid-base neutralization reaction in the water simultaneously.
In order to improve the mixing efficiency of the water body, as shown in fig. 1, a dosing tank 9 is installed at the water inlet pipe 2, a dosing pipe 10 is installed at the lower end of the dosing tank 9, and the lower end of the dosing pipe 10 extends downward into the water inlet pipe 2. Therefore, the rapid medicine adding device not only facilitates rapid medicine adding of an operator, but also can accelerate rapid medicine mixing in the water body, and improves the mixing efficiency of the water body.
Example 2: a reaction cell 15, which differs from example 1 in that: as shown in fig. 5 and 6, in order to accelerate the proceeding of acid-base neutralization reaction in the water body, the lower end of the arc-shaped stainless steel baffle 5 is hinged at the turning position of the step 4 through a rotating shaft 6, and a torsion spring 7 for driving the arc-shaped stainless steel baffle 5 to move towards the water inlet pipe 2 is sleeved on the rotating shaft 6. Have the effect of blockking of other arc stainless steel separation blades 5 on the one hand, on the other hand when the water gravity of arc stainless steel baffle 8 department is greater than torsional spring 7's torsional force, torsional spring 7 takes place elastic deformation, arc stainless steel baffle 8 can overturn downwards in order to let out unnecessary water body round pivot 6 this moment, reverse upset under torsional spring 7's effect afterwards, and at the in-process of above-mentioned upset, arc stainless steel baffle 8 can produce transverse vibration, thereby can vibrate in the flow direction production of water, and then help accelerating going on of acid-base neutralization reaction in the water.
As shown in fig. 6, in order to improve the efficiency of acid-base neutralization reaction in the water body, baffle plates 8 are installed on the left side and the right side of the arc-shaped stainless steel baffle plate 5, so that the water flow intercepted by the arc-shaped stainless steel baffle plate 5 can be increased due to the existence of the baffle plates 8, the arc-shaped stainless steel baffle plate 8 is more convenient and effective when downwards overturned around the rotating shaft 6, the vibration of the water body is increased, the acid-base neutralization reaction in the water body is accelerated, and the reaction efficiency is improved.
Example 3: a method for treating printing and dyeing wastewater by using the reaction tank 15 is shown in figure 1 and comprises the following operation steps,
and step S1, discharging the printing and dyeing wastewater into the raw water pool 11 through a dye vat sewage discharge pipe for primary heat dissipation, and detecting and recording the pH value of the raw water.
And step S2, discharging the primarily radiated water body in the raw water tank 11 into the barrier water collecting well 12, and discharging the water body with suspended matters removed into the regulating tank 13 for temporary storage.
And step S3, lifting the water body in the adjusting tank 13 into the air floatation tank 14 through a water pump, adding a polyferric flocculant and dilute sulfuric acid, adjusting the pH value to 5-6.5, and removing surface suspended matters through a mud scraper after full aeration.
And step S4, enabling the lower layer clear liquid obtained in the step S3 to flow into a reaction tank 15 through a water inlet pipe 2, adding lime water to adjust the pH value to about 7, and discharging the mixture into a primary sedimentation tank 16 for primary sedimentation.
And S5, discharging the water body in the step S4 into an aerobic tank 17 through a water pump, and decomposing, adsorbing and condensing organic matters in the water body under the action of aerobic bacteria after continuous aeration.
And step S6, discharging the water body obtained in the step S5 into the secondary sedimentation tank 18 through a water pump for sedimentation treatment again.
Step S7, sampling the water in the secondary sedimentation tank 18 to detect the COD content, and discharging a part of water into the reuse tank 23 to be used as domestic water when the COD content is below 120; the other part is discharged into a municipal pipe network and is treated again by a combined sewage treatment plant, and the qualified sewage is discharged into the sea.
Example 4: the difference between the method for treating the printing and dyeing wastewater by using the reaction tank 15 and the embodiment 3 is that: as shown in fig. 1, suspended matters intercepted by the barrier water collecting well 12 are conveyed into a plate-and-frame filter press 19 by a conveying pump for compression treatment; the sludge generated in the floatation tank 14, the primary sedimentation tank 16 and the secondary sedimentation tank 18 is conveyed into a sludge tank 20 by a sludge pump for temporary storage, and then conveyed into a plate-and-frame filter press 19 by a lifting pump for compression treatment. Suspended matters intercepted by the barrier water collecting well 12 are directly conveyed into the plate-and-frame filter press 19 for compression treatment, at the moment, the dewatered water directly falls on the ground from the lower part of the plate-and-frame filter press 19, and then an operator can use a forklift to load and transport the dry sludge to a thermal power plant for incineration; and the water body obtained by filter pressing flows into the raw water tank 11 or the regulating tank 13 again through a pipeline for subsequent treatment.
In addition, the water body after administering needs to wait that the bottom of mud a large amount of sedimentation in corresponding pond in the water, and operator's accessible sludge pump carries the concentration in sludge impoundment 20 this moment, and the upper water can flow into next pond and administer once more, not only can improve the efficiency that the water was administered from this, but also can reduce a large amount of repetition administration to the water, has improved the speed and the efficiency of administering greatly.
Example 5: the difference between the method for treating the printing and dyeing wastewater by using the reaction tank 15 and the embodiment 3 is that: as shown in fig. 1, the water filtered in the plate-and-frame filter press 19 is discharged back to the raw water tank 11 through a pipeline, and the remaining sludge is transported to the thermal power plant for incineration by a forklift. Therefore, the sludge (which is dry as a whole) obtained after the sludge is subjected to filter pressing and dewatering by the plate-and-frame filter press is completely incinerated, so that the sludge in the water body can be removed, and the device is very convenient and labor-saving.
Example 6: the difference between the method for treating the printing and dyeing wastewater by using the reaction tank 15 and the embodiment 3 is that: as shown in figure 1, since the aerobic bacteria in the aerobic tank 17 can normally grow at a temperature of 15-35 ℃ and is the optimal survival temperature of the good-sample bacteria at a temperature of 20-30 ℃, if the temperature is higher than 35 ℃ in summer, the activity of the good-sample bacteria is affected, and thus the biochemical reaction is slower to proceed, even no reaction occurs. Therefore, in step S4, the water temperature is equal to or higher than 35 ℃ in high-temperature weather, at this time, the water body after the acid-base neutralization treatment in the reaction tank 15 in the step is cooled to 20-35 ℃ by the cooling tower 21, and then discharged into the primary sedimentation tank 16 for primary sedimentation treatment. Therefore, after the water in the primary sedimentation tank 16 is cooled by the cooling tower 21, the water temperature can be kept below 35 ℃, so that the normal reaction is ensured, the oxygen content of the water is improved, and the method is very practical.
Example 7: the difference between the method for treating the printing and dyeing wastewater by using the reaction tank 15 and the embodiment 3 is that: as shown in fig. 1, since there is still much precipitate in the water body during the transportation of the water body in the secondary sedimentation tank 18 to the reuse tank 23 through the pipeline, in step S7, the upper layer liquid of the water body precipitated in the secondary sedimentation tank 18 is discharged into the reuse tank 23 after being filtered by the filter 22, and the lower layer liquid is discharged into the raw water tank 11 for reuse. Therefore, the water body treated in the secondary sedimentation tank 18 is firstly put into the filter 22 for filtration treatment, and then the lower liquid is deposited with more impurities or mud and is treated again by being discharged into the raw water tank 11. In addition, the upper liquid is discharged into the reuse tank 23 to be used as domestic water, such as car washing, flower watering or floor cleaning, and the like, which is very convenient.
The specific embodiments are only for explaining the present invention, and the present invention is not limited thereto, and those skilled in the art can make modifications without inventive contribution to the present embodiments as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (9)

1. The utility model provides a reaction tank, includes cell body (1), sets up inlet tube (2) and drain pipe (3) in cell body (1) both sides, its characterized in that: the pool body (1) is downwards inclined from the water inlet pipe (2) to the water outlet pipe (3) and is provided with a plurality of layers of steps (4), and a plurality of arc-shaped stainless steel blocking pieces (5) are upwards bent on each layer of steps (4); the lower extreme of arc stainless steel separation blade (5) articulates the turn department in step (4) through pivot (6), the cover is equipped with on pivot (6) and is used for the drive arc stainless steel separation blade (5) towards inlet tube (2) direction pivoted torsional spring (7).
2. A reaction cell according to claim 1, wherein: the arc-shaped stainless steel baffle plates (5) are arranged on the same layer of the step (4) in a staggered mode at intervals.
3. A reaction cell according to claim 1, wherein: the left side and the right side of the arc-shaped stainless steel baffle plate (5) are provided with baffle plates (8).
4. A reaction cell according to claim 2 or 3, wherein: the utility model discloses a medicine feeding device, including inlet tube (2), feed pipe (10), lower extreme of feed pipe (9) are equipped with pencil (10), the lower extreme downwardly extending of pencil (10) is in inlet tube (2).
5. A method for treating printing and dyeing wastewater by using the reaction tank of claim 1, which is characterized in that: comprises the following operation steps of the following steps of,
step S1, discharging the printing and dyeing wastewater into a raw water pool (11) through a dye vat sewage discharge pipe for primary heat dissipation, and simultaneously detecting and recording the pH value of raw water;
s2, discharging the water body after the primary heat dissipation in the raw water pool (11) into a barrier water collecting well (12), and discharging the water body after the suspended matters are removed into an adjusting pool (13) for temporary storage;
s3, lifting the water body in the adjusting tank (13) into an air floatation tank (14) through a water pump, adding a polyferric flocculant and dilute sulfuric acid, adjusting the pH value to 5-6.5, and removing surface suspended matters through a mud scraper after full aeration;
s4, enabling the lower layer clear liquid obtained in the step S3 to flow into a reaction tank (15) through a water inlet pipe (2), adding lime water to adjust the pH value to be about 7, and discharging the mixture into a primary sedimentation tank (16) for primary sedimentation;
s5, discharging the water body in the step S4 into an aerobic pool (17) through a water pump, and decomposing, adsorbing and condensing organic matters in the water body under the action of aerobic bacteria after continuous aeration;
s6, discharging the water body obtained in the step S5 into a secondary sedimentation tank (18) through a water pump for sedimentation again;
s7, sampling a water body in the secondary sedimentation tank (18) to detect the COD content, and discharging a part of water body into the reuse tank (23) to be used as domestic water when the COD content is below 120; the other part is discharged into a municipal pipe network and is treated again by a combined sewage treatment plant, and the qualified sewage is discharged into the sea.
6. The method of claim 5, wherein: suspended matters intercepted by the barrier water collecting well (12) are conveyed into a plate-and-frame filter press (19) through a conveying pump for compression treatment; and the sludge generated in the air floatation tank (14), the primary sedimentation tank (16) and the secondary sedimentation tank (18) is conveyed into a sludge tank (20) by a sludge pump for temporary storage and then conveyed into a plate-and-frame filter press (19) by a lifting pump for compression treatment.
7. The method of claim 6, wherein: and water which is subjected to filter pressing in the plate-and-frame filter press (19) is discharged back into the raw water tank (11) through a pipeline, and the residual sludge is conveyed to a thermal power plant through a forklift for incineration.
8. The method according to claim 5 or 7, characterized in that: in step S4, the water temperature is higher than or equal to 35 ℃ in high-temperature weather, at this time, the water body after acid-base neutralization treatment in the reaction tank (15) is cooled to 20-35 ℃ by a cooling tower (21), and then discharged into a primary sedimentation tank (16) for primary sedimentation treatment.
9. The method of claim 8, wherein: in step S7, the upper layer liquid of the water body precipitated by the secondary precipitation tank (18) and filtered by the filter (22) is discharged into the reuse tank (23), and the lower layer liquid is discharged into the raw water tank (11) for retreatment.
CN201810480157.7A 2018-05-18 2018-05-18 Reaction tank and method for treating printing and dyeing wastewater by adopting same Active CN108658375B (en)

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