CN219885842U - Metal surface pickling wastewater treatment system - Google Patents
Metal surface pickling wastewater treatment system Download PDFInfo
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- CN219885842U CN219885842U CN202320432917.3U CN202320432917U CN219885842U CN 219885842 U CN219885842 U CN 219885842U CN 202320432917 U CN202320432917 U CN 202320432917U CN 219885842 U CN219885842 U CN 219885842U
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- Prior art keywords
- sludge
- tank
- sulfate
- filter
- wastewater
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- 238000005554 pickling Methods 0.000 title claims abstract description 26
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 25
- 239000002184 metal Substances 0.000 title claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 17
- 239000010802 sludge Substances 0.000 claims abstract description 76
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 53
- 239000002351 wastewater Substances 0.000 claims abstract description 42
- 238000001914 filtration Methods 0.000 claims abstract description 29
- 239000002253 acid Substances 0.000 claims abstract description 17
- 230000001105 regulatory effect Effects 0.000 claims abstract description 15
- 238000000605 extraction Methods 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 238000002425 crystallisation Methods 0.000 claims abstract description 11
- 230000008025 crystallization Effects 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000004064 recycling Methods 0.000 claims abstract description 7
- 239000002244 precipitate Substances 0.000 claims abstract description 5
- 230000002378 acidificating effect Effects 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000013078 crystal Substances 0.000 claims description 5
- 229910021645 metal ion Inorganic materials 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 11
- 239000006227 byproduct Substances 0.000 abstract description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000000746 purification Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Removal Of Specific Substances (AREA)
Abstract
The utility model discloses a metal surface pickling wastewater treatment system, which comprises a sludge separation device and a sulfate extraction device, wherein the sludge separation device comprises a PH (potential of hydrogen) regulating tank, a filtering buffer tank and a sludge filter, which are sequentially arranged, the PH regulating tank can regulate acidic wastewater into weak alkaline wastewater, the filtering buffer tank can precipitate wastewater obtained by the PH regulating tank to obtain sludge, and the sludge filter can filter the sludge in the filtering buffer tank; the sulfate extraction device comprises a preposed sludge dissolving tank for dissolving the sludge obtained by the filtering buffer tank, a sulfate solution filter, a deslagging dissolved acid tank, sulfate liquid crystallization equipment and a crystallized dissolved acid recycling tank for re-extracting the crystallized sulfate, which are sequentially arranged; the output of sulfate byproducts is obtained, so that the influence of metal ions on the environment is avoided, and the income can be increased in the pickling wastewater treatment process; thereby effectively reducing the cost of wastewater treatment.
Description
Technical Field
The utility model relates to the technical field of wastewater treatment equipment, in particular to a metal surface pickling wastewater treatment system.
Background
The surface of the metal product is usually treated by concentrated sulfuric acid, but a large amount of harmful acid wastewater is generated after the treatment, and the wastewater needs to be treated again; the existing treatment principle of the pickling and flushing wastewater mainly comprises the steps of regulating the pH to be alkalescent through a neutralization reaction, oxidizing metal ions in water into high-valence ions easy to precipitate through aeration oxidation, reacting with alkali to generate precipitate, and subsequently precipitating the precipitate in the wastewater through flocculation precipitation, thereby achieving the effect of purifying the wastewater; in the process, most of metals in the wastewater are precipitated once to generate a large amount of sludge with various metal ions, so that the sludge is inconvenient to treat and secondary pollution is easy to generate; the water purified by the method has high salt content and cannot be directly utilized; and all metal ions in the wastewater are directly converted into sludge, and the sludge is not recycled, so that a large amount of metal resources are wasted; and causes the problem of high treatment cost of the pickling wastewater.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide a metal surface pickling wastewater treatment system.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides a metal surface pickling wastewater treatment system, includes mud separator and sulfate extraction device, mud separator includes PH equalizing basin and filtration buffer pool and the sludge filter that sets gradually, the PH equalizing basin can be with sour waste water regulation weak alkaline waste water, filtration buffer pool can carry out the sediment with the waste water that the PH equalizing basin obtained and obtain mud, the sludge filter can filter the mud in the filtration buffer pool;
the sulfate extraction device comprises a preposed sludge dissolving tank for dissolving the sludge obtained by the filtering buffer tank, a sulfate solution filter, a deslagging dissolved acid tank, sulfate liquid crystallization equipment and a crystallized dissolved acid recycling tank for re-extracting the crystallized sulfate, which are sequentially arranged;
the sulfate solution obtained by the front sludge dissolving tank is filtered by a sulfate solution filter, deslagged, dissolved in an acid tank and sulfate liquid crystallization equipment to obtain sulfate crystals.
The utility model further provides that: and the filter buffer tank is used for filtering the wastewater, and further comprises a wastewater processor for purifying the wastewater generated by the filter buffer tank.
The utility model further provides that: and a PH adjusting stirrer is arranged in the PH adjusting tank.
The utility model further provides that: a sludge dissolving stirrer is arranged in the front sludge dissolving tank.
The utility model further provides that: a sludge pump is arranged between the filtering buffer tank and the sludge filter, and the sludge pump pumps the sludge obtained by the filtering buffer tank into the sludge filter.
The utility model further provides that: a water pump is arranged between the front sludge dissolving tank and the sulfate solution filter, and the water pump pumps sulfate solution obtained from the front sludge dissolving tank into the sulfate solution filter.
The utility model has the beneficial effects that: the pickling wastewater treatment system comprises a sludge separation device and a sulfate extraction device, wherein the sludge separation device separates the pickling wastewater into sludge with metal ions and wastewater, the wastewater is purified by a wastewater processor to obtain reusable clean water, and the sludge is treated and recovered by the sulfate extraction device to obtain byproduct sulfate crystals and reusable sulfate solution; the method has the advantages that the metal ions in the wastewater are recovered, the resource utilization rate is improved, the output of sulfate byproducts is obtained, the influence of the metal ions on the environment is avoided, and the benefit can be increased in the pickling wastewater treatment process; therefore, the pickling wastewater treatment process is not a pure input process, and the wastewater treatment cost is effectively reduced.
Drawings
FIG. 1 is a schematic diagram of a metal surface pickling wastewater treatment system according to the present utility model;
reference numerals illustrate: 1. a PH adjusting tank; 11. a pH adjusting stirrer; 2. filtering and buffering the pool; 3. a sludge filter; 4. leading a sludge dissolving tank; 41. a sludge dissolving stirrer; 5. a sulfate solution filter; 6. dissolving an acid pool after deslagging; 7. sulfate liquid crystallization equipment; 8. a dissolved acid recycling pool after crystallization; 9. a sludge pump; 10. and a water pump.
Detailed Description
A metal surface pickling wastewater treatment system according to the present utility model will be described in further detail with reference to fig. 1.
The system comprises a sludge separation device and a sulfate extraction device, wherein the sludge separation device comprises a PH regulating tank 1, a filtering buffer tank 2 and a sludge filter 3 which are sequentially arranged, pickling wastewater enters the PH regulating tank 1, liquid caustic soda is added into the PH regulating tank 1, a PH regulating stirrer 11 in the PH regulating tank 1 is used for stirring, and the PH value of the wastewater in the PH regulating tank 1 is regulated to about 8, so that the acidic wastewater is regulated to be slightly alkaline wastewater; the weak alkaline wastewater enters a filtering buffer tank 2, and the filtering buffer tank 2 naturally precipitates the weak alkaline wastewater to obtain bottom sludge and top clear wastewater; the sludge pump 9 between the filtering buffer tank 2 and the sludge filter 3 pumps the sludge obtained by the filtering buffer tank 2 into the sludge filter 3, and the sludge filter 3 can filter the sludge in the filtering buffer tank 2, wherein the wastewater generated in the sludge filter 3 and the filtering buffer tank 2 directly enters a wastewater processor for purification treatment, namely, the acid washing wastewater is treated by a sludge separation device to obtain the sludge with metal ions and purified water after purification;
the sulfate extraction device comprises a front sludge dissolving tank 4, a sulfate solution filter 5, a deslagging dissolved acid tank 6, a sulfate liquid crystallization device 7 and a crystallized dissolved acid recycling tank 8 which are sequentially arranged and used for dissolving the sludge obtained by the filtering buffer tank 2;
the sludge separated by the sludge separation device enters a front sludge dissolving tank 4, a proper amount of concentrated sulfuric acid with the concentration of 98.3% and a proper amount of water are added, the sludge dissolving stirrer 41 in the front sludge dissolving tank 4 is used for stirring and dissolving to obtain sulfate solution with the proper concentration (the sulfuric acid concentration of the solution is about 20%), the sulfate solution is pumped into a sulfate solution filter 5 by a water suction pump 10 for re-filtering, the sulfate solution obtained after filtering is transferred into a deslagging dissolving acid tank 6, the sulfate solution in the deslagging dissolving acid tank 6 is transferred into a sulfate liquid crystallization device 7 for crystallization in a low-temperature freezing crystallization mode, and byproduct sulfate crystals and separated sulfate dissolving liquid enter a dissolving acid recycling tank 8 for recycling;
the pickling wastewater treatment system comprises a sludge separation device and a sulfate extraction device, wherein the sludge separation device separates the pickling wastewater into sludge with metal ions and wastewater, the wastewater is purified by a wastewater processor to obtain reusable clean water, and the sludge is treated and recovered by the sulfate extraction device to obtain byproduct sulfate crystals and reusable sulfate solution; the method has the advantages that the metal ions in the wastewater are recovered, the resource utilization rate is improved, the output of sulfate byproducts is obtained, the influence of the metal ions on the environment is avoided, and the benefit can be increased in the pickling wastewater treatment process; therefore, the pickling wastewater treatment process is not a pure input process, and the wastewater treatment cost is effectively reduced.
The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.
Claims (6)
1. A metal surface pickling wastewater treatment system is characterized in that: the device comprises a sludge separation device and a sulfate extraction device, wherein the sludge separation device comprises a PH regulating tank (1), a filtering buffer tank (2) and a sludge filter (3) which are sequentially arranged, the PH regulating tank (1) can regulate acidic wastewater into weak alkaline wastewater, the filtering buffer tank (2) can precipitate the wastewater obtained by the PH regulating tank (1) to obtain sludge, and the sludge filter (3) can filter the sludge in the filtering buffer tank (2);
the sulfate extraction device comprises a front sludge dissolving tank (4), a sulfate solution filter (5), a deslagging dissolved acid tank (6), sulfate liquid crystallization equipment (7) and a crystallized dissolved acid recycling tank (8) which are sequentially arranged and used for dissolving the sludge obtained by the filtering buffer tank (2);
wherein the sulfate solution obtained by the front sludge dissolving tank (4) is filtered by a sulfate solution filter (5), deslagged and dissolved in an acid tank (6) and sulfate liquid crystallization equipment (7) to obtain sulfate crystals.
2. A metal surface pickling wastewater treatment system according to claim 1, characterized by: and also comprises a wastewater processor for purifying wastewater generated by the filtering buffer tank (2).
3. A metal surface pickling wastewater treatment system according to claim 1 or 2, characterized in that: a PH adjusting stirrer (11) is arranged in the PH adjusting tank (1).
4. A metal surface pickling wastewater treatment system according to claim 3, characterized by: a sludge dissolving stirrer (41) is arranged in the front sludge dissolving tank (4).
5. The metal surface pickling wastewater treatment system as claimed in claim 4, wherein: a sludge pump (9) is arranged between the filtering buffer tank (2) and the sludge filter (3), and the sludge pump (9) pumps the sludge obtained by the filtering buffer tank (2) into the sludge filter (3).
6. The metal surface pickling wastewater treatment system according to claim 5, wherein: a water suction pump (10) is arranged between the front sludge dissolving tank (4) and the sulfate solution filter (5), and the water suction pump (10) pumps sulfate solution obtained by the front sludge dissolving tank (4) into the sulfate solution filter (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320432917.3U CN219885842U (en) | 2023-03-09 | 2023-03-09 | Metal surface pickling wastewater treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320432917.3U CN219885842U (en) | 2023-03-09 | 2023-03-09 | Metal surface pickling wastewater treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219885842U true CN219885842U (en) | 2023-10-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320432917.3U Active CN219885842U (en) | 2023-03-09 | 2023-03-09 | Metal surface pickling wastewater treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219885842U (en) |
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2023
- 2023-03-09 CN CN202320432917.3U patent/CN219885842U/en active Active
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