CN220012368U - Pretreatment device for heavy metal-containing wastewater - Google Patents
Pretreatment device for heavy metal-containing wastewater Download PDFInfo
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- CN220012368U CN220012368U CN202320520372.1U CN202320520372U CN220012368U CN 220012368 U CN220012368 U CN 220012368U CN 202320520372 U CN202320520372 U CN 202320520372U CN 220012368 U CN220012368 U CN 220012368U
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- unit
- precipitation separation
- flocculation
- separation unit
- pretreatment device
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- 239000002351 wastewater Substances 0.000 title claims abstract description 41
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 33
- 238000000926 separation method Methods 0.000 claims abstract description 54
- 238000001556 precipitation Methods 0.000 claims abstract description 50
- 238000005189 flocculation Methods 0.000 claims abstract description 37
- 230000016615 flocculation Effects 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims abstract description 33
- 238000005345 coagulation Methods 0.000 claims abstract description 33
- 230000015271 coagulation Effects 0.000 claims abstract description 33
- 239000003814 drug Substances 0.000 claims description 22
- 239000010802 sludge Substances 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 239000003513 alkali Substances 0.000 claims description 6
- 239000000701 coagulant Substances 0.000 claims description 6
- 239000008394 flocculating agent Substances 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims 1
- 239000010814 metallic waste Substances 0.000 abstract 1
- 238000004062 sedimentation Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000002253 acid Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The utility model discloses a pretreatment device for heavy metal-containing wastewater, which comprises a reaction unit, a flocculation unit, a coagulation aiding unit, a precipitation separation unit and an adjusting unit, wherein the reaction unit is provided with a wastewater inlet, a water outlet of the reaction unit is communicated with a water inlet of the flocculation unit, a water outlet of the flocculation unit is communicated with a water inlet of the coagulation aiding unit, a water outlet of the coagulation aiding unit is communicated with a water inlet of the precipitation separation unit, a water outlet of the precipitation separation unit is communicated with a water inlet of the adjusting unit, and the adjusting unit is provided with a wastewater outlet; the reaction unit, the flocculation unit, the coagulation assisting unit and the adjusting unit are distributed in a shape of Chinese character 'Tian' and are arranged on one side of the pretreatment device; the precipitation separation unit is arranged on the other side of the pretreatment device. The device compact structure, for integrated device, realized containing heavy metal waste water's high-efficient processing, can greatly reduced waste water heavy metal's content, alleviate follow-up advanced treatment cost.
Description
Technical Field
The utility model relates to the technical field of wastewater treatment, in particular to a pretreatment device for wastewater containing heavy metals.
Background
The industrial wastewater generally contains heavy metal ions such as gold, silver, nickel, cobalt, copper, zinc, manganese and the like, and the content of the heavy metal ions is very high, generally about 1 mg/L. The standard related to the discharge of heavy metal wastewater is particularly strict, and is usually below 0.05 mg/min. This requirement is difficult to achieve by physical sedimentation under such conditions. It is common practice to perform membrane treatment, or resin adsorption. Under the condition that pretreatment is not carried out in the earlier stage, membrane treatment and resin adsorption are directly carried out, so that the membrane and the resin need to be backwashed, the replacement period can be very short, the operation cost is very high, and the economic effect cannot be achieved.
In the prior art, pretreatment of heavy metal-containing wastewater generally comprises a sedimentation device, a reaction device, a filtering device and the like, a plurality of devices are required to be used for treatment, the removal effect of heavy metal cannot meet the actual requirement, the occupied area of the devices is large, the later maintenance cost is high, and the manual operation cost is relatively high.
Disclosure of Invention
Aiming at the problems, the utility model provides the pretreatment device for the wastewater containing heavy metals, which can greatly reduce the content of the heavy metals in the wastewater and lighten the subsequent advanced treatment cost.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the pretreatment device for the heavy metal-containing wastewater comprises a reaction unit, a flocculation unit, a coagulation assisting unit, a precipitation separation unit and an adjusting unit, wherein the reaction unit is provided with a wastewater inlet, a water outlet of the reaction unit is communicated with a water inlet of the flocculation unit, a water outlet of the flocculation unit is communicated with a water inlet of the coagulation assisting unit, a water outlet of the coagulation assisting unit is communicated with a water inlet of the precipitation separation unit, a water outlet of the precipitation separation unit is communicated with a water inlet of the adjusting unit, and the adjusting unit is provided with a wastewater outlet;
the reaction unit, the flocculation unit, the coagulation assisting unit and the adjusting unit are distributed in a shape of Chinese character 'Tian' and are arranged on one side of the pretreatment device;
the precipitation separation unit is arranged on the other side of the pretreatment device.
The flocculation unit is connected with the sedimentation separation unit through a central pipeline, and a third through hole is formed in the partition plate between the sedimentation separation unit and the adjustment unit.
The cross sections of the first through hole, the second through hole and the third through hole are any one of square, round and polygonal.
The reaction unit, the flocculation unit, the coagulation assisting unit and the adjusting unit are square cylinders, and a stirrer is arranged right above the square cylinders; the top of the reaction unit is provided with a precipitant medicine inlet, the top of the flocculation unit is provided with a flocculating agent medicine inlet, the top of the coagulation assisting unit is provided with a coagulant assisting medicine inlet, and the top of the regulating unit is provided with an acid medicine inlet and an alkali medicine inlet.
The sedimentation separation unit comprises a sedimentation separation unit tank body, a feeding pipe is fixedly arranged on the inner wall of the top of the sedimentation separation unit tank body, the feeding pipe extends downwards to the inside of the sedimentation separation unit tank body, the feeding pipe is communicated with the coagulation assisting unit through a central pipeline, the lower end of the feeding pipe is opened, and a flow baffle plate is arranged below the feeding pipe;
an overflow weir is arranged below the middle upper part of the precipitation separation unit tank body corresponding to the top, an overflow groove is formed between the overflow weir and the inner wall of the precipitation separation unit tank body, and the overflow groove is communicated with the regulating unit through a third through hole;
the bottom of the precipitation separation unit tank body is provided with a mud discharge pipeline.
One end of the sludge discharge pipeline is connected with the bottom of the precipitation separation unit tank body, and the other end of the sludge discharge pipeline is connected with the sludge pump.
And inclined tube filler is arranged on the inner wall of the bottom of the precipitation separation unit tank body and used for guiding the precipitated sludge particles to the center of the tank bottom.
Compared with the prior art, the utility model has the advantages that:
the utility model provides a pretreatment device for heavy metal-containing wastewater, which comprises a reaction unit, a flocculation unit, a coagulation assisting unit, a precipitation separation unit and an adjusting unit, wherein the device is compact in structure and is an integrated device, so that the high-efficiency treatment of the heavy metal-containing wastewater is realized, the heavy metal content of the wastewater can be greatly reduced, and the subsequent advanced treatment cost is reduced.
Drawings
FIG. 1 is a plan view of a pretreatment apparatus for wastewater containing heavy metals according to the present utility model.
FIG. 2 is a front view of a pretreatment apparatus for wastewater containing heavy metals according to the present utility model.
FIG. 3 is a left side view of a pretreatment device for wastewater containing heavy metals.
In the figure: 1. a reaction unit; 2. a flocculation unit; 3. a coagulation aiding unit; 4. a precipitation separation unit; 5. an adjusting unit; 6. a wastewater inlet; 7. a wastewater outlet; 8. a partition plate; 901. a first through hole; 902. a second through hole; 903. a third through hole; 10. a central conduit; 11. a stirrer; 12. a precipitation separation unit tank body; 13. a feed pipe; 14. a flow baffle; 15. an overflow weir; 16. an overflow trough; 17. a sludge discharge pipe; 18. a mud pump; 19. a precipitant medicine inlet; 20. a flocculant medicine inlet; 21. a coagulant aid inlet; 22. an acid medicine inlet; 23. an alkali medicine inlet; 24. and (5) inclined tube filling.
Detailed Description
In order that those skilled in the art may better understand the technical solutions of the present utility model, the following detailed description of the present utility model with reference to the accompanying drawings is provided for exemplary and explanatory purposes only and should not be construed as limiting the scope of the present utility model.
Referring to fig. 1 to 3, in a specific embodiment, a pretreatment device for heavy metal-containing wastewater includes a reaction unit 1, a flocculation unit 2, a coagulation aiding unit 3, a precipitation separation unit 4 and an adjusting unit 5, wherein the reaction unit 1 is provided with a wastewater inlet 6, a water outlet of the reaction unit 1 is communicated with a water inlet of the flocculation unit 2, a water outlet of the flocculation unit 2 is communicated with a water inlet of the coagulation aiding unit 3, a water outlet of the coagulation aiding unit 3 is communicated with a water inlet of the precipitation separation unit 4, a water outlet of the precipitation separation unit 4 is communicated with a water inlet of the adjusting unit 5, and the adjusting unit 5 is provided with a wastewater outlet 7;
the reaction unit 1, the flocculation unit 2, the coagulation assisting unit 3 and the adjusting unit 5 are arranged in a shape of a Chinese character 'Tian' and are arranged on one side of the pretreatment device;
the precipitation separation unit 4 is arranged on the other side of the pretreatment device.
As a preferable mode of the above embodiment, the reaction unit 1, the flocculation unit 2, the coagulation aiding unit 3, and the adjusting unit 5 are separated from each other by a partition 8, a first through hole 901 is formed in the partition between the reaction unit 1 and the flocculation unit 2, a second through hole 902 is formed in the partition between the flocculation unit 2 and the coagulation aiding unit 3, the coagulation aiding unit 3 is communicated with the precipitation separation unit 4 by a central pipeline 10, and a third through hole 903 is formed in the partition between the precipitation separation unit 4 and the adjusting unit 5.
As a preferable mode of the above embodiment, the cross section of the first through hole 901, the second through hole 902, and the third through hole 903 is any one of square, round, and polygonal.
As a preferable mode of the above embodiment, the reaction unit 1, the flocculation unit 2, the coagulation-assisting unit 3 and the adjusting unit 5 are all square cylinders, and a stirrer 11 is arranged right above the square cylinders; the top of the reaction unit 1 is provided with a precipitant medicine inlet 19, the top of the flocculation unit 2 is provided with a flocculant medicine inlet 20, the top of the coagulation assisting unit 3 is provided with a coagulant assisting medicine inlet 21, and the top of the regulating unit 5 is provided with an acid medicine inlet 22 and an alkali medicine inlet 23, as shown in figure 1.
As a preferred mode of the above embodiment, the precipitation separation unit 4 includes a precipitation separation unit tank 12, a feeding pipe 13 is fixedly installed on the top inner wall of the precipitation separation unit tank 12, the feeding pipe 13 extends downward into the precipitation separation unit tank 12, the feeding pipe 13 is communicated with the coagulation aiding unit 3 through the central pipeline 10, the lower end of the feeding pipe 13 is opened, and a flow baffle 14 is arranged below the feeding pipe 13;
as a preferable mode of the above embodiment, an overflow weir 15 is arranged below the middle upper portion of the precipitation separation unit tank body 12 corresponding to the top portion, an overflow groove 16 is formed between the overflow weir 15 and the inner wall of the precipitation separation unit tank body 12, and the overflow groove 16 is communicated with the adjusting unit 5 through a third through hole 903;
as a preferable mode of the above embodiment, the bottom of the precipitation separation unit tank 12 is provided with a sludge discharge pipe 17.
As a preferred mode of the above embodiment, one end of the sludge discharge pipe 17 is connected to the bottom of the precipitation separation unit tank 12, and the other end thereof is connected to the sludge pump 18.
As a preferred mode of the above embodiment, the inner wall of the bottom of the precipitation separation unit tank body 12 is provided with a pipe chute filler 24 for guiding the precipitated sludge particles to the center of the tank bottom, as shown in fig. 2.
The working principle of the utility model is as follows:
(1) And (3) a reaction unit: the wastewater containing heavy metals to be treated enters the reaction unit 1 through the wastewater inlet 6, and liquid alkali is added through the precipitant medicine inlet 19, so that the heavy metals react with the precipitant to generate heavy metal hydroxide precipitate;
(2) Flocculation unit: the wastewater treated by the reaction unit 1 enters the flocculation unit 2 from the reaction unit 1 through the first through hole 901, and the flocculant PAC is added through the flocculant medicine inlet 20 to flocculate heavy metal particles into large particles;
(3) And (5) a coagulation assisting unit: the wastewater treated by the flocculation unit 2 enters the flocculation assisting unit 3 from the flocculation unit 2 through the second through holes 902, and coagulant aid PAM is added through a coagulant aid medicine inlet 21, so that high molecular PAM and heavy metal particulate flocculation large particulate matters are combined;
(4) Precipitation separation unit: the wastewater treated by the coagulation assisting unit 3 enters a feeding pipe 13 through a central pipeline 10, then enters a precipitation separation unit tank body 12, particles at the bottom of a precipitation area are pumped to a filter press for filter pressing through a mud pump 18, filter pressing residues are used as hazardous waste for outward transportation, and clear water at the top enters an overflow tank 16 through an overflow weir 15;
(5) An adjusting unit: the wastewater in the overflow groove 16 enters the regulating unit 5 through the third through hole 903, the supernatant fluid after precipitation enters the pH regulating unit to carry out pH callback by adopting acid and alkali, and the solution after callback is discharged through the wastewater outlet 7 to go to the advanced treatment process.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. The foregoing is merely illustrative of the preferred embodiments of this utility model, and it is noted that there is objectively no limit to the specific structure disclosed herein, since numerous modifications, adaptations and variations can be made by those skilled in the art without departing from the principles of the utility model, and the above-described features can be combined in any suitable manner; such modifications, variations and combinations, or the direct application of the inventive concepts and aspects to other applications without modification, are contemplated as falling within the scope of the present utility model.
Claims (7)
1. The pretreatment device for the heavy metal-containing wastewater is characterized by comprising a reaction unit (1), a flocculation unit (2), a coagulation assisting unit (3), a precipitation separation unit (4) and an adjusting unit (5), wherein the reaction unit (1) is provided with a wastewater inlet (6), a water outlet of the reaction unit (1) is communicated with a water inlet of the flocculation unit (2), a water outlet of the flocculation unit (2) is communicated with a water inlet of the coagulation assisting unit (3), a water outlet of the coagulation assisting unit (3) is communicated with a water inlet of the precipitation separation unit (4), a water outlet of the precipitation separation unit (4) is communicated with a water inlet of the adjusting unit (5), and the adjusting unit (5) is provided with a wastewater outlet (7);
the reaction unit (1), the flocculation unit (2), the coagulation assisting unit (3) and the regulating unit (5) are arranged in a shape of a Chinese character 'Tian' and are arranged on one side of the pretreatment device;
the precipitation separation unit (4) is arranged on the other side of the pretreatment device.
2. The pretreatment device for heavy metal-containing wastewater according to claim 1, wherein the reaction unit (1), the flocculation unit (2), the coagulation assisting unit (3) and the adjusting unit (5) are separated from each other by a partition plate (8), a first through hole (901) is formed in the partition plate between the reaction unit (1) and the flocculation unit (2), a second through hole (902) is formed in the partition plate between the flocculation unit (2) and the coagulation assisting unit (3), the coagulation assisting unit (3) is communicated with the precipitation separation unit (4) by a central pipeline (10), and a third through hole (903) is formed in the partition plate between the precipitation separation unit (4) and the adjusting unit (5).
3. The pretreatment device for wastewater containing heavy metals according to claim 2, wherein the first through hole (901), the second through hole (902), and the third through hole (903) have a circular or polygonal cross section.
4. The pretreatment device for wastewater containing heavy metals according to claim 1, wherein the reaction unit (1), the flocculation unit (2), the coagulation assisting unit (3) and the regulating unit (5) are square cylinders, and a stirrer (11) is arranged right above the square cylinders; the top of reaction unit (1) is equipped with precipitant and advances medicine mouth (19), the top of flocculation unit (2) is equipped with flocculating agent and advances medicine mouth (20), the top of helping congeals unit (3) is equipped with helps the coagulant and advances medicine mouth (21), the top of adjustment unit (5) is equipped with sour medicine mouth (22), alkali medicine mouth (23).
5. The pretreatment device for heavy metal-containing wastewater according to claim 2, wherein the precipitation separation unit (4) comprises a precipitation separation unit tank body (12), a feed pipe (13) is fixedly arranged on the top inner wall of the precipitation separation unit tank body (12), the feed pipe (13) extends downwards to the inside of the precipitation separation unit tank body (12), the feed pipe (13) is communicated with the coagulation assisting unit (3) through the central pipeline (10), the lower end of the feed pipe (13) is provided with an opening, and a flow baffle (14) is arranged below the feed pipe (13);
an overflow weir (15) is arranged below the middle upper part of the precipitation separation unit tank body (12) corresponding to the top, an overflow groove (16) is formed between the overflow weir (15) and the inner wall of the precipitation separation unit tank body (12), and the overflow groove (16) is communicated with the regulating unit (5) through a third through hole (903);
the bottom of the precipitation separation unit tank body (12) is provided with a mud discharge pipeline (17).
6. The pretreatment device for wastewater containing heavy metals according to claim 5, wherein one end of the sludge discharge pipe (17) is connected with the bottom of the precipitation separation unit tank body (12), and the other end thereof is connected with the sludge pump (18).
7. The pretreatment device for wastewater containing heavy metals according to claim 5, wherein the inner wall of the bottom of the precipitation separation unit tank body (12) is provided with a pipe chute packing (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320520372.1U CN220012368U (en) | 2023-03-17 | 2023-03-17 | Pretreatment device for heavy metal-containing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320520372.1U CN220012368U (en) | 2023-03-17 | 2023-03-17 | Pretreatment device for heavy metal-containing wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220012368U true CN220012368U (en) | 2023-11-14 |
Family
ID=88678693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320520372.1U Active CN220012368U (en) | 2023-03-17 | 2023-03-17 | Pretreatment device for heavy metal-containing wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220012368U (en) |
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2023
- 2023-03-17 CN CN202320520372.1U patent/CN220012368U/en active Active
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