CN217947848U - Advanced treatment device for printing and dyeing wastewater - Google Patents
Advanced treatment device for printing and dyeing wastewater Download PDFInfo
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- CN217947848U CN217947848U CN202222168900.XU CN202222168900U CN217947848U CN 217947848 U CN217947848 U CN 217947848U CN 202222168900 U CN202222168900 U CN 202222168900U CN 217947848 U CN217947848 U CN 217947848U
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Abstract
The utility model discloses a printing and dyeing wastewater advanced treatment unit, including two heavy ponds, middle pond, neutralization pond, the play pond that connect gradually, two heavy ponds are equipped with the pipeline and are connected with middle pond and neutralization pond respectively, and two pipeline between heavy pond and the middle pond are provided with H 2 SO 4 The dosing site and the first pipeline mixer are arranged on the water outlet pipeline of the intermediate tank, the intermediate tank is provided with a pH monitoring device, and the pipeline between the intermediate tank and the intermediate tank is provided with H 2 O 2 A dosing site and a pipeline mixer, a neutralization tank including a reaction tank and a precipitateThe reaction tank is internally provided with a liquid caustic soda dosing site and a pH monitoring device, the second grid is used for clarification and sedimentation, and the water outlet tank is provided with a second branch pipe which is connected with an air-water backwashing pipeline and can be used as backwashing water. The utility model discloses impact resistance is strong, stability is good, the medicament use amount is less, and sewage treatment is efficient and the cost is lower.
Description
Technical Field
The utility model relates to a waste water treatment technical field, in particular to printing and dyeing wastewater advanced treatment unit.
Background
The waste water discharged by printing and dyeing enterprises has the characteristics of large water quantity, high organic pollutant content, difficult degradation, deep chromaticity, large alkalinity, diversified water quality and the like, thereby belonging to industrial waste water which is difficult to treat. At present, the printing and dyeing wastewater treatment processes commonly used in the printing and dyeing industry are mainly divided into two main types, namely a physicochemical method and a biochemical method. With the increasing requirements of the country on the discharged water quality, the search for more efficient, economic and stable advanced treatment technology is becoming a subject of attention in the current environmental protection industry.
The existing wastewater treatment processes wastewater through a treatment route, when the concentration of pollutants in the wastewater is high, the dosage of a medicament needs to be increased in a reaction tank, and the neutralization treatment of the wastewater can be realized only by prolonging the reaction time. However, this method cannot be favorably adjusted according to the concentration of the contaminant in the wastewater, and when the concentration of the contaminant is high, it takes a long time, and the amount of the chemical to be charged is large, resulting in low reaction efficiency. In view of the above problems, a solution is proposed as follows.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a printing and dyeing wastewater advanced treatment unit has and can carry out earlier stage treatment through two circuits to waste water for the treatment effeciency's of waste water advantage.
The above technical purpose of the present invention can be achieved by the following technical solutions:
the advanced treatment device for the printing and dyeing wastewater comprises a secondary sedimentation tank, an intermediate tank, a neutralization tank and a water outlet tank which are sequentially connected through a pipeline, wherein a first branch pipe is further arranged on the secondary sedimentation tank, the secondary sedimentation tank is connected with the neutralization tank through the first branch pipe, a first dosing site is arranged between the secondary sedimentation tank and the intermediate tank, and the first dosing site is used for dosing H 2 SO 4 One end of the first dosing site far away from the secondary sedimentation tank is connected with a first pipeline mixerThe first pipeline mixer is used for mixing liquid, a first monitoring device is arranged in the intermediate tank and used for monitoring the pH value of the liquid in the intermediate tank, the neutralization tank comprises a reaction tank and a sedimentation tank, a second dosing site and a second monitoring device are arranged in the reaction tank, the second monitoring devices are used for monitoring the pH value in the reaction tank, the second dosing site is used for adding a medicament to adjust the pH value in the reaction tank, a first regulating valve is arranged at the joint of the first branch pipe and the pipeline, and the first regulating valve is used for regulating the flow of liquid in the second sedimentation tank into the neutralization tank and the middle tank.
Preferably, the first monitoring device is positioned at a water inlet of the middle tank, a third dosing site is arranged in the middle tank, and the third dosing site is used for adding FeSO 4 The middle tank is also internally provided with a first stirring device which is used for stirring the liquid in the middle tank so as to ensure that FeSO is generated 4 Fully mixing with the liquid in the intermediate tank.
Preferably, the water outlet end of the intermediate tank is connected with a Fenton reactor, the water inlet end of the Fenton reactor is positioned below the water outlet end of the Fenton reactor, the water outlet end of the Fenton reactor is positioned above the water outlet end of the Fenton reactor, and a filler layer is arranged in the Fenton reactor and used for removing organic pollutants.
Preferably, a fourth dosing site is arranged on a pipeline at the water outlet end of the intermediate tank and used for feeding H 2 O 2 The end, far away from the middle tank, of the fourth dosing site is connected with a second pipeline mixer which is used for mixing H 2 O 2 And the liquid flowing out of the middle tank.
Preferably, the second dosing site is used for adding liquid alkali solution, the liquid alkali solution is used for adjusting the pH value of the liquid in the neutralization tank, and an aeration stirring device is further arranged in the reaction tank and used for fully mixing the liquid in the reaction tank.
Preferably, a COD monitoring device is arranged at the water outlet of the sedimentation tank and used for monitoring the water quality in the sedimentation tank.
Preferably, still be equipped with the filtering pond between sedimentation tank and the play pond, the filtering pond is used for filtering the liquid that flows in by the sedimentation tank, the filtering pond is biological activated carbon filter, be equipped with supporting layer and activated carbon layer in the filtering pond, the supporting layer is located the below on activated carbon layer, the water inlet in filtering pond is located one side on supporting layer, supporting layer and activated carbon layer cooperation to the realization is to the purification of liquid.
Preferably, an air-water backwashing device is further arranged in the filter tank, a second branch pipe is arranged in the water outlet tank, one end of the second branch pipe is connected with the air-water backwashing device, and the air-water backwashing device is used for washing the filter tank.
The utility model has the advantages that: through first regulation method, can adjust the proportion that the waste water that flows from the sedimentation tank enters into middle pond and neutralization pond, when the pollutant concentration in the waste water is high, make waste water part enter into middle pond and react, another part enters into and reacts in the neutralization pond, reduces the reaction pressure in the neutralization pond to waste water treatment's efficiency has been accelerated.
Drawings
Fig. 1 is a schematic structural diagram of the embodiment.
Reference numerals: 1. a secondary sedimentation tank; 2. an intermediate tank; 3. a neutralization pond; 4. a water outlet pool; 5. a first branch pipe; 6. a first dosing site; 7. a first line mixer; 8. a first monitoring device; 9. a reaction tank; 10. a sedimentation tank; 11. a second dosing site; 12. a second monitoring device; 13. a first regulating valve; 14. a third dosing site; 15. a Fenton reactor; 16. a fourth dosing site; 17. a second line mixer; 18. an aeration stirring device; 19. a COD monitoring device; 20. a filter chamber; 21. a second branch pipe.
Detailed Description
The following is only the preferred embodiment of the present invention, the protection scope is not limited to this embodiment, and all technical solutions belonging to the idea of the present invention should belong to the protection scope of the present invention. In which like parts are designated by like reference numerals. It should be noted that as used in the following description, the terms "front," "back," "left," "right," "upper," and "lower" refer to directions in the drawings, and the terms "bottom" and "top," "inner," and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in figure 1, the advanced treatment device for the printing and dyeing wastewater comprises a secondary sedimentation tank 1, an intermediate tank 2, a neutralization tank 3 and a water outlet tank 4 which are sequentially connected through pipelines. The secondary sedimentation tank 1 is also provided with a first branch pipe 5, the secondary sedimentation tank 1 is connected with the neutralization tank 3 through the first branch pipe 5, and a first regulating valve 13 is arranged at the joint of the first branch pipe 5 and the pipeline. The wastewater in the secondary sedimentation tank 1 is precipitated, most solid particles in the wastewater are removed, and then the wastewater in the secondary sedimentation tank 1 enters the intermediate tank 2 or the neutralization tank 3 through a pipeline.
When the content of pollutants in the wastewater in the secondary sedimentation tank 1 is low, the first regulating valve 13 sends the wastewater into the first branch pipe 5 completely, and the wastewater is sent into the neutralization tank 3 through the first branch pipe 5. When the content of pollutants in the wastewater in the secondary sedimentation tank 1 is high, the first regulating valve 13 sends part of the wastewater into the neutralization tank 3, and the other part of the wastewater into the intermediate tank 2. The two pools simultaneously treat the wastewater, so that the removal efficiency of pollutants in the wastewater can be accelerated.
A first dosing site 6 is arranged between the secondary sedimentation tank 1 and the intermediate tank 2, the first dosing site 6 is used for dosing H2SO4, and one end, far away from the secondary sedimentation tank 1, of the first dosing site 6 is connected with a first pipeline mixer 7. The first dosing site 6 is positioned in front of the first regulating valve 13, H2SO4 solution is added into the wastewater through the first dosing site 6, the liquid is fully mixed through the first pipeline mixer 7, and the pH value of the wastewater can be regulated.
The middle tank 2 is internally provided with a first monitoring device 8, the first monitoring device 8 can monitor the pH of the liquid in the middle tank 2, and the pH of the wastewater entering the middle tank 2 is adjusted to be about 3-4 by adjusting the amount of the H2SO4 solution added at the first dosing site 6.
The first monitoring device 8 is located at the water inlet of the intermediate tank 2 and is capable of monitoring the pH of the liquid entering the intermediate tank 2. Be equipped with third medicine site 14 in middle pond 2, third medicine site 14 is used for throwing with FeSO4, still is equipped with first agitating unit in the middle pond 2, and first agitating unit is common stirring structure, can stir the liquid flow in the middle pond 2 to make FeSO4 intensive mixing in the liquid in middle pond 2.
A fourth dosing site 16 is arranged on a pipeline at the water outlet end of the intermediate tank 2, the fourth dosing site 16 is used for dosing H2O2, one end, far away from the intermediate tank 2, of the fourth dosing site 16 is connected with a second pipeline mixer 17, and the second pipeline mixer 17 is used for mixing the H2O2 and liquid flowing out of the intermediate tank 2.
The water outlet end of the intermediate tank 2 is connected with a Fenton reactor 15, and the lower part of the Fenton reactor 15 receives the wastewater from the intermediate tank 2 and discharges the wastewater from the water outlet at the upper end. A packing layer is arranged in the Fenton reactor 15, and pollutants in the wastewater can be removed through the packing layer. The reaction time of the wastewater in the Fenton reactor 15 is 20min-30min.
The neutralization tank 3 comprises a reaction tank 9 and a sedimentation tank 10, a second dosing site 11 and a second monitoring device 12 are arranged in the reaction tank 9, and alkaline solutions such as liquid alkali solution and the like can be added at the second dosing site 11 to adjust the pH value in the reaction tank 9. The reaction tank 9 is also provided with an aeration stirring device 18, the aeration stirring device 18 is used for stirring the liquid in the reaction tank 9, so that the liquid in the reaction tank 9 is fully mixed, and the pH value of the liquid in each position in the reaction tank 9 is the same. The second monitoring device 12 is used for monitoring the pH in the reaction tank 9, so that the pH of the liquid in the reaction tank 9 is adjusted to be neutral and alkaline.
In the reaction tank 9, fe2+ and Fe3+ remaining in the liquid flowing out of the fenton reactor 15 will undergo coagulation reaction with the liquid in the reaction tank 9, the reaction time is controlled to be about 3 minutes, and the liquid after the reaction is discharged into the sedimentation tank 10 for sedimentation. A COD monitoring device 19 is arranged at the water outlet of the sedimentation tank 10, and the COD monitoring device 19 can monitor the water quality in the sedimentation tank 10.
A filter 20 is also arranged between the sedimentation tank 10 and the water outlet tank 4, and the filter 20 is a biological activated carbon filter 20. A bearing layer and an activated carbon layer are arranged in the filter 20, and a water inlet of the filter 20 is positioned at one side of the bearing layer. The filter 20 is of a lower inlet and upper outlet type, water in the sedimentation tank 10 enters the filter 20 from the lower part of the filter 20, pollutants in the wastewater in the filter 20 are decomposed by microorganisms on a bearing layer, and the wastewater is purified by an activated carbon layer.
The purified wastewater enters the water outlet tank 4, a second branch pipe 21 is arranged in the water outlet tank 4, an air-water backwashing device is arranged in the filter tank 20, and the second branch pipe 21 is connected with the air-water backwashing device. The purified water in the water outlet tank 4 can be used for back flushing the filter tank 20, so that water resources are saved.
The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The advanced treatment device for the printing and dyeing wastewater comprises a secondary sedimentation tank (1), an intermediate tank (2), a neutralization tank (3) and a water outlet tank (4) which are sequentially connected through a pipeline, and is characterized in that a first branch pipe (5) is further arranged on the secondary sedimentation tank (1), the secondary sedimentation tank (1) is connected with the neutralization tank (3) through the first branch pipe (5), a first dosing site (6) is arranged between the secondary sedimentation tank (1) and the intermediate tank (2), the first dosing site (6) is used for dosing H2SO4, one end, far away from the secondary sedimentation tank (1), of the first dosing site (6) is connected with a first pipeline mixer (7), the first pipeline mixer (7) is used for mixing liquid, a first monitoring device (8) is arranged in the intermediate tank (2), the first monitoring device (8) is used for monitoring the pH of the liquid in the intermediate tank (2), the neutralization tank (3) comprises a reaction tank (9) and a sedimentation tank (10), a second monitoring device (11) and a second reagent adjusting valve (12) are arranged in the reaction tank (9), and a second reagent adding pipe (12) is used for adjusting the pH of the reaction tank (9), the first regulating valve (13) is used for regulating the flow of liquid in the secondary sedimentation tank (1) into the neutralization tank (3) and the intermediate tank (2).
2. The advanced printing and dyeing wastewater treatment device according to claim 1, characterized in that the first monitoring device (8) is positioned at the water inlet of the intermediate tank (2), a third dosing point (14) is arranged in the intermediate tank (2), the third dosing point (14) is used for dosing FeSO4, and a first stirring device is further arranged in the intermediate tank (2) and is used for stirring the liquid in the intermediate tank (2) so as to fully mix the FeSO4 with the liquid in the intermediate tank (2).
3. The advanced printing and dyeing wastewater treatment device according to claim 2, characterized in that a Fenton reactor (15) is connected to the water outlet end of the intermediate tank (2), the water inlet end of the Fenton reactor (15) is positioned below, the water outlet end of the Fenton reactor (15) is positioned above, and a packing layer is arranged in the Fenton reactor (15) and used for removing organic pollutants.
4. The advanced printing and dyeing wastewater treatment device according to claim 3, characterized in that a fourth dosing point (16) is arranged on the pipeline at the water outlet end of the intermediate tank (2), the fourth dosing point (16) is used for dosing H2O2, a second pipeline mixer (17) is connected to one end of the fourth dosing point (16) far away from the intermediate tank (2), and the second pipeline mixer (17) is used for mixing the H2O2 with the liquid flowing out of the intermediate tank (2).
5. The advanced printing and dyeing wastewater treatment device according to claim 4, characterized in that the second dosing site (11) is used for dosing liquid alkali solution, the liquid alkali solution is used for adjusting the pH value of the liquid in the neutralization tank (3), an aeration stirring device (18) is further arranged in the reaction tank (9), and the aeration stirring device (18) is used for fully mixing the liquid in the reaction tank (9).
6. The advanced printing and dyeing wastewater treatment device according to claim 5, characterized in that a COD monitoring device (19) is arranged at the water outlet of the sedimentation tank (10), and the COD monitoring device (19) is used for monitoring the water quality in the sedimentation tank (10).
7. The advanced treatment device for the printing and dyeing wastewater according to claim 6, characterized in that a filter tank (20) is further arranged between the sedimentation tank (10) and the water outlet tank (4), the filter tank (20) is used for filtering the liquid flowing from the sedimentation tank (10), the filter tank (20) is a biological activated carbon filter tank (20), a bearing layer and an activated carbon layer are arranged in the filter tank (20), the bearing layer is positioned below the activated carbon layer, the water inlet of the filter tank (20) is positioned on one side of the bearing layer, and the bearing layer is matched with the activated carbon layer to purify the liquid.
8. The advanced printing and dyeing wastewater treatment device according to claim 7, characterized in that an air-water backwashing device is further arranged in the filter tank (20), a second branch pipe (21) is arranged in the water outlet tank (4), one end of the second branch pipe (21) is connected with the air-water backwashing device, and the air-water backwashing device is used for washing the filter tank (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222168900.XU CN217947848U (en) | 2022-08-18 | 2022-08-18 | Advanced treatment device for printing and dyeing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222168900.XU CN217947848U (en) | 2022-08-18 | 2022-08-18 | Advanced treatment device for printing and dyeing wastewater |
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| Publication Number | Publication Date |
|---|---|
| CN217947848U true CN217947848U (en) | 2022-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222168900.XU Active CN217947848U (en) | 2022-08-18 | 2022-08-18 | Advanced treatment device for printing and dyeing wastewater |
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| CN (1) | CN217947848U (en) |
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2022
- 2022-08-18 CN CN202222168900.XU patent/CN217947848U/en active Active
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