CN208776462U - A kind of processing of leather industry chromate waste water, chromium mud are reduced complete set of equipments - Google Patents
A kind of processing of leather industry chromate waste water, chromium mud are reduced complete set of equipments Download PDFInfo
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- CN208776462U CN208776462U CN201820574584.7U CN201820574584U CN208776462U CN 208776462 U CN208776462 U CN 208776462U CN 201820574584 U CN201820574584 U CN 201820574584U CN 208776462 U CN208776462 U CN 208776462U
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- waste water
- chromium
- chromate waste
- collecting pit
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Abstract
The utility model belongs to chromate waste water processing technology field, more particularly to a kind of processing of leather industry chromate waste water, chromium mud is reduced complete set of equipments, including sequentially connected for adjusting the chromium water collecting pit of chromate waste water PH, for removing the demulsification flotation tank and membrane filtration system of grease and suspended matter in the chromate waste water, described membrane filtration system one end is connected with concentrated water collecting pit, the opposite other end is connected with filtered solution collecting pit, the concentrated water collecting pit is connected with the dosing sedimentation basin for being built-in with coagulation flocculation aid, dosing sedimentation basin one end is connected with chromium water collecting pit, the opposite other end is connected with chromium mud filter press.The utility model proposes the processing of leather industry chromate waste water, chromium mud decrement complete set of equipments handled and chromium mud Decrement Technique by leather industry chromate waste water, by substituting traditional dosing depositing technology, reduce the yield of adding of agent machine chromium mud, the level of clean production of leather-making enterprises is improved, dangerous waste yield is reduced.
Description
Technical field
The utility model relates to the processing of leather industry chromate waste water, chromium mud to be reduced complete set of equipments, implement to improve by technology
The level of clean production of leather-making enterprises greatly reduces leather industry chromium mud dangerous waste, reduces enterprise operation cost.Belong to chromate waste water
Processing technology field is suitable for newly-built processing leather industry chromate waste water processing, chromium mud is reduced complete set of equipments.
Background technique
Leather industry belongs to the key industry of national environmental protection control and plan, and relates to the industry of heavy metals emission.Process hides adds
Chromium water occurs mainly with several processes such as tanning, retanning, neutralization, dyeing, stuffing, technology in work, accounts for leather-making waste water total Water
40--50%, total chrome content is in 200--500mg/L.And domestic existing wastewater processing technology is in the processing of process hides chromate waste water at present
It is upper that alkali (sodium hydroxide, lime), coagulant (aluminium polychloride, ferrous sulfate etc.), polyacrylamide are still added using traditional
Coagulant sedimentation.This method is primarily present that reagent consumption is big, stably reaching standard is difficult, it is sometimes desirable to which secondary dosing can be only achieved containing chromium
Discharge outlet total chromium discharge in waste water workshop is less than the requirement of 1.5mg/l, and operating cost is high, chromium water alkaline chemical precipitation needs while adding big
The assistant medicament (lime, coagulant, polyacrylamide) of amount could form wadding body precipitating, and the generation of chromium mud is very big, and chromium mud category
In dangerous waste, processing cost is at 3000-5000 yuan/ton.There is strict demand in country to dangerous waste supervision, and leather industry largely contains chromium
Sludge will become the big problem for restricting industry and enterprise development and the following existence.
Has application publication number CN102399037A now, the Chinese patent of data of publication of application 2012.04.04 discloses
A kind of processing method of chromate waste water comprising the steps of: (1) handle in conditioning tank: chromate waste water is transported to conditioning tank
In filter out suspended matter after, carry out water quality and water quantity exchange；(2) it is handled in processing pond: the chromate waste water of conditioning tank is output to
In processing pond, sulfuric acid adjustment pH value is added between 2.5-3.2, ferrous sulfate is then added and is stirred 10-20 minutes；
(3) neutralisation treatment: alkaline matter is added in each processing pond and is neutralized, stirs and adjusts pH value between 7-8；(4) it is precipitating
It is handled in pond: the waste water of processing pond is output in sedimentation basin, upper layer clean water overflow to clear water reserviors, it is dense that sediment is then transported to sludge
Contracting pond.The processing method must carry out in acid condition, and process conditions are stringent, are unfavorable for practical operation；In the processing method
Be then trivalent chromium changes the existence form of trivalent chromium by hexavalent chrome reduction by addition ferrous sulfate reducing agent, i.e., plus
Sodium hydroxide neutralizes, and trivalent chromium is made to become Cr (OH)3, precipitate, trivalent chromium removed, which will consume a large amount of reduction
Agent, processing cost is high, and treatment effeciency is low, and can introduce new ion (Fe3+), generate new precipitating Fe (OH)3, influence to do
Disturb the sedimentation flocculation of trivalent chromium.
In conclusion being generated to solve process hides chromate waste water qualified discharge existing in the prior art and the dangerous waste of solid containing chromium
It measures the problems such as big, needs a kind of leather industry chromate waste water processing of utility model, chromium mud decrement complete set of equipments at present, pass through process hides
Industrial chromium-containing waste water processing and chromium mud Decrement Technique, solve the problems, such as process hides stably reaching standard containing wastewater treatment, while passing through substitution
Traditional dosing depositing technology greatly reduces the yield of adding of agent machine chromium mud, improves the level of clean production of leather-making enterprises, subtract
Few dangerous waste yield can create great economic and social benefit for leather-making enterprises.
Utility model content
The utility model proposes a kind of processing of leather industry chromate waste water, chromium mud to be reduced complete set of equipments, solves process hides and contains chromium
Discharged wastewater met the national standard and the big problem of the dangerous waste yield of solid containing chromium pass through technology and implement to improve the clean manufacturing water of leather-making enterprises
It is flat, greatly reduce leather industry chromium mud dangerous waste, reduces enterprise operation cost.
The technical solution of the utility model is achieved in that
A kind of processing of leather industry chromate waste water, chromium mud are reduced complete set of equipments, including sequentially connected contain chromium for adjusting
The chromium water collecting pit of waste water PH, the demulsification flotation tank for removing grease and suspended matter in the chromate waste water and film filtering system
System, described membrane filtration system one end are connected with concentrated water collecting pit, and the opposite other end is connected with filtered solution collecting pit, the concentrated water
Collecting pit is connected with the dosing sedimentation basin for being built-in with coagulation flocculation aid, and dosing sedimentation basin one end is connected with chromium water collecting pit,
The opposite other end is connected with chromium mud filter press；
The chromate waste water that tanning production generates is collected into the chromium water collecting pit, and alkali is added to adjust PH to 7.5~8.5,
Again through the air floatation machine processing removal grease and partial suspended thing in demulsification flotation tank, enters membrane filtration system afterwards and filter to form filtration
Liquid and concentrate, filtered solution enter sewage disposal system processing, and concentrate enters concentrated water collecting pit and dosing sedimentation basin place of settling
Reason forms supernatant and chromium mud, and the supernatant enters chromium water collecting pit and handled again, and chromium mud passes through chromium mud filter press pressure
Filter dehydration.
The chromium water collecting pit front end is additionally provided with chromate waste water grid pond, and the chromate waste water grid pond includes for cutting
Stay the coarse rack and fine fack of chromate waste water floating material, suspended matter.
The stirring system for preventing chromium mud plate knot is provided in the chromium water collecting pit.
The filtered solution collecting pit is connected with sewage disposal system.
The membrane filtration system is equally distributed ceramic membrane or hollow-fibre membrane.It is described that substitution biography is filtered by membranous system
The chromium water dosing precipitation process of system, greatly reduces medicament expense and chromium mud yield, and improve stably reaching standard ability.
The utility model have the characteristics that it is following and the utility model has the advantages that
The processing of leather industry chromate waste water, chromium mud decrement complete set of equipments are collected by setting chromate waste water in the utility model
Pond, demulsification flotation tank, membrane filtration system, concentrated water collecting pit, concentrated water dosing sedimentation basin, chromium mud filter press, are contained by leather industry
Chromium wastewater treatment and chromium mud Decrement Technique solve the problems, such as process hides stably reaching standard containing wastewater treatment, while being added by substitution tradition
Medicine depositing technology greatly reduces the yield of adding of agent machine chromium mud, improves the level of clean production of leather-making enterprises, reduces dangerous waste
Yield can create great economic and social benefit for leather-making enterprises, it is ensured that stably reaching standard after the processing of process hides chromate waste water leads to
The implementation for crossing this technology reduces chromium mud yield (dangerous waste) 80% or more, reduces by 80% or more enterprise's dangerous waste disposal costs, third is that
Save 90% or more dosage of chromium mud treatment agent.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the processing of the utility model leather industry chromate waste water, chromium mud decrement complete set of equipments.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
The processing of leather industry chromate waste water shown in referring to Fig.1, chromium mud are reduced the structural schematic diagram of complete set of equipments.A kind of system
Industrial chromium-containing waste water processing, chromium mud decrement complete set of equipments are removed from office, is received including the sequentially connected chromium water for adjusting chromate waste water PH
Ji Chi, demulsification flotation tank and membrane filtration system for removing grease and suspended matter in the chromate waste water, the film filtering
System one end is connected with concentrated water collecting pit, and the opposite other end is connected with filtered solution collecting pit, and the concentrated water collecting pit is connected with
It is built-in with the dosing sedimentation basin of coagulation flocculation aid, dosing sedimentation basin one end is connected with chromium water collecting pit, the opposite other end
It is connected with chromium mud filter press；
The chromate waste water that tanning production generates is collected into the chromium water collecting pit, and alkali is added to adjust PH to 7.5~8.5,
Again through the air floatation machine processing removal grease and partial suspended thing in demulsification flotation tank, enters membrane filtration system afterwards and filter to form filtration
Liquid and concentrate, filtered solution enter sewage disposal system processing, and concentrate enters concentrated water collecting pit and dosing sedimentation basin place of settling
Reason forms supernatant and chromium mud, and the supernatant enters chromium water collecting pit and handled again, and chromium mud passes through chromium mud filter press pressure
Filter dehydration.
The chromium water collecting pit front end is additionally provided with chromate waste water grid pond, and the chromate waste water grid pond includes for cutting
Stay the coarse rack and fine fack of chromate waste water floating material, suspended matter.Being provided in the chromium water collecting pit prevents chromium mud plate knot
Stirring system.The filtered solution collecting pit is connected with sewage disposal system.The membrane filtration system is equally distributed ceramic membrane
Or hollow-fibre membrane.It is described that traditional chromium water dosing precipitation process is substituted by membranous system filtering, greatly reduce medicament expense and
Chromium mud yield, and improve stably reaching standard ability.It is described that traditional chromium water dosing precipitation process is substituted by membranous system filtering, greatly
It is big to reduce medicament expense and chromium mud yield, and improve stably reaching standard ability.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (5)
1. a kind of leather industry chromate waste water processing, chromium mud are reduced complete set of equipments, it is characterised in that: be used for including sequentially connected
Adjust the chromium water collecting pit of chromate waste water PH, the demulsification flotation tank for removing grease and suspended matter in the chromate waste water and
Membrane filtration system, described membrane filtration system one end are connected with concentrated water collecting pit, and the opposite other end is connected with filtered solution collecting pit,
The concentrated water collecting pit is connected with the dosing sedimentation basin for being built-in with coagulation flocculation aid, and dosing sedimentation basin one end is connected with chromium water
Collecting pit, the opposite other end are connected with chromium mud filter press.
2. leather industry chromate waste water processing according to claim 1, chromium mud are reduced complete set of equipments, it is characterised in that: institute
It states chromium water collecting pit front end and is additionally provided with chromate waste water grid pond, the chromate waste water grid pond includes for retaining chromate waste water
The coarse rack and fine fack of floating material, suspended matter.
3. leather industry chromate waste water processing according to claim 1, chromium mud are reduced complete set of equipments, it is characterised in that: institute
It states in chromium water collecting pit and is provided with the stirring system for preventing chromium mud plate knot.
4. leather industry chromate waste water processing according to claim 1, chromium mud are reduced complete set of equipments, it is characterised in that: institute
It states filtered solution collecting pit and is connected with sewage disposal system.
5. leather industry chromate waste water processing according to claim 1, chromium mud are reduced complete set of equipments, it is characterised in that: institute
Stating membrane filtration system is equally distributed ceramic membrane or hollow-fibre membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820574584.7U CN208776462U (en) | 2018-04-20 | 2018-04-20 | A kind of processing of leather industry chromate waste water, chromium mud are reduced complete set of equipments |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820574584.7U CN208776462U (en) | 2018-04-20 | 2018-04-20 | A kind of processing of leather industry chromate waste water, chromium mud are reduced complete set of equipments |
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| Publication Number | Publication Date |
|---|---|
| CN208776462U true CN208776462U (en) | 2019-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820574584.7U Expired - Fee Related CN208776462U (en) | 2018-04-20 | 2018-04-20 | A kind of processing of leather industry chromate waste water, chromium mud are reduced complete set of equipments |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113860550A (en) * | 2021-09-30 | 2021-12-31 | 中新联科环境科技(安徽)有限公司 | Chromium-containing wastewater treatment system and filter pressing device used by same |
-
2018
- 2018-04-20 CN CN201820574584.7U patent/CN208776462U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113860550A (en) * | 2021-09-30 | 2021-12-31 | 中新联科环境科技(安徽)有限公司 | Chromium-containing wastewater treatment system and filter pressing device used by same |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190423 Termination date: 20210420 |
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| CF01 | Termination of patent right due to non-payment of annual fee |