CS210811B1 - Method of liquidation of slimes from planting plants and slimes resulting at waste water purification of metal surface treatment plants by means of chemical treatment by silicates and following burning - Google Patents
Method of liquidation of slimes from planting plants and slimes resulting at waste water purification of metal surface treatment plants by means of chemical treatment by silicates and following burning Download PDFInfo
- Publication number
- CS210811B1 CS210811B1 CS805864A CS586480A CS210811B1 CS 210811 B1 CS210811 B1 CS 210811B1 CS 805864 A CS805864 A CS 805864A CS 586480 A CS586480 A CS 586480A CS 210811 B1 CS210811 B1 CS 210811B1
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- slimes
- silicates
- plants
- waste water
- metal surface
- Prior art date
Links
- 150000004760 silicates Chemical class 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 7
- 239000002351 wastewater Substances 0.000 title claims description 4
- 229910052751 metal Inorganic materials 0.000 title claims description 3
- 239000002184 metal Substances 0.000 title claims description 3
- 238000004381 surface treatment Methods 0.000 title claims description 3
- 239000000126 substance Substances 0.000 title claims 2
- 238000000746 purification Methods 0.000 title 1
- 239000010802 sludge Substances 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 235000013312 flour Nutrition 0.000 claims description 2
- 239000003415 peat Substances 0.000 claims description 2
- 238000005246 galvanizing Methods 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical class [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical group N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 ferrous metal compounds Chemical class 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010454 slate Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
- Removal Of Specific Substances (AREA)
Description
Vynález se týká termické likvidace kalů po čištění odpadních vod z povrchových úprav kovů a po filtraci pokovovacích lázní.The invention relates to the thermal disposal of sludges after the treatment of waste water from metal surface treatment and after filtration of the plating baths.
Doposud se tyto kaly zahušťovaly na kalových polích nebo v kalolisech nebo ve vakuových filtrech do rypného stavu a vyvážely se na vyhrazené deponie. Tyto odpady většinou obsahují zbytky toxických látek, jako jsou kyanidy, sloučeniny šestimocného chrómu a rozpustné sloučeniny barevných kovů, jež pronikají s vodou do půdy a podzemních vod i do povrchových toků a ohrožují silně okolní životní prostředí. Další nevýhody spočívají v pracné manipulaci s kaly, v jejich odvozu na deponie, které zabírají neúčelně značné prostory, vyžadují dozor a kontrolu. Z hlediska ekonomického je tento způsob nevýhodný vzhledem ke spotřebě energie na zahušťování.Until now, these sludges have been densified in sludge fields or filter presses or vacuum filters and exported to dedicated deposits. These wastes usually contain residues of toxic substances such as cyanides, hexavalent chromium compounds and soluble non-ferrous metal compounds that penetrate the soil and groundwater and surface water with water and threaten the environment greatly. Other disadvantages are the laborious handling of sludge, its removal to the depots, which occupy unnecessarily large areas, require supervision and control. From an economic point of view, this method is disadvantageous due to the energy consumption for thickening.
Uvedené nevýhody odstraňuje způsob termické likvidace podle vynálezu, který spočívá v tom, že se kal v suspenzi za stálého míchání zalkalizuje přídavkem hydroxidu vápenatého do rozmezí pH 8,5 až 14 a smísí se s křemičitany ve formě písku, jílu nebo jiných křemičitanů, například břidlice, v množství 10 až 30 % hmotnostních vůči sušině kalu a s mletým nebo jemně drceným vápencem, sodou nebo jiným uhličitanem v množství 10 až 20 % hmotnostních vůči sušině kalu. Kašovité směs se za stálého mícháni zahustí pilinami, uhelným mourem nebo rašelinou do sypkého stavu. Takto upravené směs se spálí v jakémkoliv spalném systému při teplotě tání křemičitanů.The above-mentioned disadvantages are eliminated by the thermal disposal method according to the invention, which consists in making the sludge in suspension suspended with stirring by adding calcium hydroxide up to a pH range of 8.5 to 14 and mixing with silicates in the form of sand, clay or other silicates such as slate. , in an amount of 10 to 30% by weight relative to the dry matter of the sludge and with ground or finely crushed limestone, soda or other carbonate in an amount of 10 to 20% by weight relative to the dry matter of the sludge. The slurry is thickened with sawdust, coal wall or peat until it is mixed. The treated mixture is burned in any combustion system at the melting point of the silicates.
Výhody způsobu podle vynálezu spočívají hlavně v tom, že po spálení spalné produkty neobsahují žádné toxické látky a že během celého procesu likvidace nevznikají toxické exha láce. Způsob vyžaduje minimální investiční a provozní náklady.The advantages of the process according to the invention consist mainly in the fact that after combustion the combustion products do not contain any toxic substances and that no toxic emissions occur during the entire disposal process. The method requires minimal investment and operating costs.
Příklad 1Example 1
V sedimentační jímce čisticího systému odpadních vod je kal obsahující toxické sloučeniny trojmocného a Šestimocného chrómu a zbytky kyanidů. Kal se v suspenzi za stálého míchání zalkalizuje hydroxidem vápenatým do rozmezí pH 8,5 až 14 a přidá se 10 % hmotnostních vůči sušině kalu křemičitanu ve formě písku nebo jílu a 10 % hmotnostních vůči sušině kalu vápence. Suspenze se zahustí do sypkého stavu přídavkem dřevěných pilin nebo uhelného mouru a spálí se v jakémkoliv spalném systému za teploty tání křemičitanů.In the sedimentation well of the sewage treatment system, there is sludge containing toxic trivalent and hexavalent chromium compounds and cyanide residues. The sludge is made alkaline with calcium hydroxide up to pH 8.5-14 under continuous stirring, and 10% by weight on dry weight of the silicate sludge in the form of sand or clay and 10% by weight on dry weight of the limestone slurry are added. The slurry is concentrated to the bulk by the addition of sawdust or coal flour and burned in any combustion system at the melting point of silicates.
Příklad 2Example 2
Kal po zneškodňování odpadních vod z galvanizovny se přidá v množství 1 až 3 % hmotnostních k cihlářské směsi, promíchá se a směs se zpracovává dále běžnou cihlářskou technologii.The sludge after disposal of the waste water from the electroplating plant is added in an amount of 1 to 3% by weight to the brick mixture, mixed and the mixture is further processed by conventional brick technology.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS805864A CS210811B1 (en) | 1979-01-18 | 1980-08-27 | Method of liquidation of slimes from planting plants and slimes resulting at waste water purification of metal surface treatment plants by means of chemical treatment by silicates and following burning |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS42079A CS210810B1 (en) | 1979-01-18 | 1979-01-18 | Method of thermal liquidation of slimes from planting plants and slimes arising during purification of waste water of metal surface treatment plants |
| CS805864A CS210811B1 (en) | 1979-01-18 | 1980-08-27 | Method of liquidation of slimes from planting plants and slimes resulting at waste water purification of metal surface treatment plants by means of chemical treatment by silicates and following burning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CS210811B1 true CS210811B1 (en) | 1982-01-29 |
Family
ID=5336223
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS42079A CS210810B1 (en) | 1979-01-18 | 1979-01-18 | Method of thermal liquidation of slimes from planting plants and slimes arising during purification of waste water of metal surface treatment plants |
| CS805864A CS210811B1 (en) | 1979-01-18 | 1980-08-27 | Method of liquidation of slimes from planting plants and slimes resulting at waste water purification of metal surface treatment plants by means of chemical treatment by silicates and following burning |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS42079A CS210810B1 (en) | 1979-01-18 | 1979-01-18 | Method of thermal liquidation of slimes from planting plants and slimes arising during purification of waste water of metal surface treatment plants |
Country Status (1)
| Country | Link |
|---|---|
| CS (2) | CS210810B1 (en) |
-
1979
- 1979-01-18 CS CS42079A patent/CS210810B1/en unknown
-
1980
- 1980-08-27 CS CS805864A patent/CS210811B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CS210810B1 (en) | 1982-01-29 |
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