CN107381526B - Waste acid treatment method after aluminum profile and aluminium alloy cleaning - Google Patents
Waste acid treatment method after aluminum profile and aluminium alloy cleaning Download PDFInfo
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- CN107381526B CN107381526B CN201710559695.0A CN201710559695A CN107381526B CN 107381526 B CN107381526 B CN 107381526B CN 201710559695 A CN201710559695 A CN 201710559695A CN 107381526 B CN107381526 B CN 107381526B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/30—Alkali metal phosphates
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D1/00—Fertilisers containing potassium
- C05D1/02—Manufacture from potassium chloride or sulfate or double or mixed salts thereof
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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Abstract
The present invention relates to a kind of waste acid treatment methods after aluminum profile and aluminium alloy cleaning, the following steps are included: S101: alkaline matter is added into the waste acid liquor after aluminum profile and aluminium alloy cleaning, it is 6.5~7.5 in pH value, Baume angle value is 30~40, temperature is 90 DEG C~100 DEG C, time is to stir evenly under 40min~80min, is cooled to crystallization later；S102: the product that S101 is obtained is separated by solid-liquid separation, and obtains solid phase, is used after later drying solid phase as water soluble fertilizer；Alkaline matter is added in liquid phase, adjusts the indicator reactions such as pH value, preparing phosphoric acid product salt.Waste acid treatment method non-wastewater discharge provided by the invention, no secondary residue generate；And by the PO in spent acid4 3‑、SO4 2‑、NO3 ‑And Al3+It is recycled, effectively realizes recycling for resource, generate the higher economic benefit of added value, whole process realizes clean manufacturing.
Description
Technical field
The present invention relates to Treating Industrial Wastewater fields, and in particular to the waste acid treatment after a kind of aluminum profile and aluminium alloy cleaning
Method.
Background technique
There are 600 Duo Jia aluminum profile manufacturing enterprises in China at present, annual to produce more than 200 ten thousand tons of aluminum profiles, aluminium and aluminium alloy systems
The primary raw material of product chemical polishing is phosphoric acid, sulfuric acid etc., and the primary raw material of Ye You producer is phosphoric acid, sulfuric acid, nitric acid etc..Mesh
The method that preceding aluminum profile waste acid treatment uses is divided into: physics process, chemical disposal method and biological process three classes.However, this
The final result of three kinds of processing methods is all to make PO therein4 3-、SO4 2-、NO3 -、Al3+Generate insoluble phosphate, sulfuric acid
Salt, nitrate, hydroxide precipitating, are after filtering handled the industrial residue outward transport become, and filtrate cycle uses or discharge.
On the one hand traditional treatment method produces a large amount of precipitating body refuse i.e. second of waste residue, if aluminium-containing sludge processing is not
When aluminium content being made to increase in ambient soil, to inhibit plant root growth, make leaves of plants Huang and fall off.Waste water outlet is also
It needs to adjust back, not only increases cost during readjustment, moreover generate some floccule precipitatings again, and be extremely difficult to discharge mark
It is quasi-.When aluminium content is 0.1~0.5mg/L in water, the aquatiles such as toadfish and grass carp prelarva can be made dead.On the other hand it is
It could not be by the PO in spent acid4 3-、SO4 2-、NO3 -、Al3+It is recycled, is resulted in waste of resources.The especially mine money of phosphorus
Source is fewer and fewer, and country also requires embargo in plain text, protects mineral resources.
Based on this, in order to conscientiously carry out and adhere to following for " 3R " principle (i.e. " minimizing -- recycling -- recycling ")
Ring Economic concept adheres to that " double high one is excellent " (" is rebuild traditional industry using new and high technology, promote hi-tech industrialization, optimization produces
Industry structure and technical pattern ") guilding principle, accelerate to eliminate the backward production facilities, accelerate to cultivate new strategic growth point, open energetically
Scientific and technical innovation and technological transformation are opened up, the new product of efficient low-risk is greatly developed, it is useless to explore the aluminium section material that high-titer utilizes
Sour processing method is particularly important.
Summary of the invention
For the defects in the prior art, the present invention is intended to provide a kind of aluminum profile and aluminium alloy cleaning after waste acid treatment
Method.Waste acid treatment method non-wastewater discharge provided by the invention, no secondary residue generate；And by the PO in spent acid4 3-、SO4 2-、
NO3 -And Al3+It is recycled, effectively realizes recycling for resource, generate the higher economic benefit of added value.In addition, of the invention
Using thermal method neutralization reaction technology, only have water vapour to distribute in production process, without " exhaust gas ", " waste water ", " waste residue " discharge, Quan Liu
Cheng Shixian clean manufacturing.
For this purpose, the invention provides the following technical scheme:
In a first aspect, the present invention provides a kind of waste acid treatment method after aluminum profile and aluminium alloy cleaning, including following step
It is rapid: S101: the first substance is added into the waste acid liquor after aluminum profile and aluminium alloy cleaning, is stirred in the first preset condition
Uniformly, it is cooled to crystallization later；Wherein, the first substance includes alkaline matter；S102: the product that S101 is obtained carries out solid-liquid point
From obtaining the first liquid phase and the first solid phase.
In further embodiment of the invention, after S102 further include: S103: the first liquid phase that S102 is obtained into
Row concentration, controls the Baume angle value in liquid phase concentration process, is filtered after being cooled to crystallization later, isolated second liquid phase
And second solid phase；S104: being added phosphoric acid in the second liquid phase that S103 is obtained, and stirs evenly under the second preset condition, later
It is filtered after being cooled to crystallization, isolated third liquid phase and third solid phase.
In further embodiment of the invention, in S101, the first substance further includes flocculant；And alkaline matter is selected
Potassium hydroxide.Flocculant of the invention selects polyacrylamide (PAM), and molecular weight is 8,000,000, in use process, by liquid weight
Amount: having prepared 0.3% concentration flocculant=1kg:10mL ratio taken amount, and adding water and being diluted to concentration is 0.1% use.
In further embodiment of the invention, in S101, the first preset condition specifically: pH value is 6.5~7.5,
Baume angle value is 30~40, and temperature is 90 DEG C~100 DEG C, and the time is 40min~80min.
In further embodiment of the invention, in S104, the second preset condition specifically: pH value is 4.3~4.7,
Baume angle value is 40~50, and temperature is greater than or equal to 90 DEG C, and the time is 30min~60min.
In further embodiment of the invention, S101 and S103, cooling temperature are less than or equal to 30 DEG C；
In S104, cooling temperature is less than or equal to 60 DEG C；In S103, control liquid phase concentration process in Baume degrees be 40~
50。
In further embodiment of the invention, alkali adjusting is added to handle third liquid phase, later as third solid phase
Raw material repeats the operation of S103~S104.
In further embodiment of the invention, adding alkali to adjust the temperature of processing is 70 DEG C~80 DEG C.
In further embodiment of the invention, in S101, the original of the waste acid liquor after aluminum profile and aluminium alloy cleaning
Expect component specifically: phosphatase 11 0~12%, sulfuric acid 20~25% and Al3+30~50g/L；Either: phosphoric acid 8~12%, sulphur
Acid 20~23%, nitric acid 0.5~1% and Al3+30~50g/L.
In further embodiment of the invention, solid phase is collected, is dried later, as potassium sulfate fertilizers and phosphoric acid
Potassium dihydrogen product uses.
Above-mentioned technical proposal provided by the invention has the advantage that
(1) applicant has found by numerous studies: waste acid treatment method non-wastewater discharge provided by the invention, no secondary useless
Slag generates；And by the PO in spent acid4 3-、SO4 2-、NO3 -And Al3+It is recycled, effectively realizes recycling for resource, generated attached
Value added higher economic benefit.
(2) present invention uses thermal method neutralization reaction technology, and only water vapour distributes in production process, without " exhaust gas ", " gives up
Water ", " waste residue " discharge, whole process realize clean manufacturing.
(3) it regard the solid phase drying that the present invention is collected into as fertilizer and preparing phosphoric acid sylvite product later, quality can
It is compared favourably with the product produced with certified products acid.And through national product quality inspection unit (Zunyi product quality inspection detects institute)
Detection, quality meet national standard；Specific examination criteria includes GB20406--2006 and HG2321--1992.
(4) when the solid phase that the present invention obtains is as Fertilizer application, Grain Growth Situation can be effectively controlled, crops is promoted to squat
Seedling takes root and blooms, the accumulation of dry matter in promotion Fruit, colouring and fruit, so that increasing crop yield；And it cultivates and obtains
Crops there are the anti-adversity abilities such as excellent anti-aging, cold-resistant, drought resisting.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Specific embodiment
The embodiment of technical solution of the present invention will be described in detail below.Following embodiment is only used for clearer
Illustrate technical solution of the present invention, therefore be only used as example, and not intended to limit the protection scope of the present invention.
Experimental method in following embodiments is unless otherwise specified conventional method.
Test material as used in the following examples is unless otherwise specified to be commercially available from conventional reagent shop.
Quantitative test in following embodiment, is respectively provided with three repeated experiments, and data are the average value of three repeated experiments
Or mean+SD.
The present invention provides a kind of waste acid treatment method after aluminum profile and aluminium alloy cleaning, comprising the following steps:
S101: the first substance is added into the waste acid liquor after aluminum profile and aluminium alloy cleaning, is incited somebody to action in the first preset condition
It is stirred evenly, and is cooled to crystallization later；Wherein, the first substance includes alkaline matter.Wherein, the first substance further includes flocculation
Agent；And alkaline matter selects potassium hydroxide.First preset condition specifically: pH value is 6.5~7.5, and Baume angle value is 30~40,
Temperature is 90 DEG C~100 DEG C, and the time is 40min~80min.
S102: the product that S101 is obtained is separated by solid-liquid separation, and obtains the first liquid phase and the first solid phase.
Preferably, after S102 further include: S103: the first liquid phase that S102 is obtained is concentrated, control liquid phase concentration
Baume angle value in the process.
S104: being added phosphoric acid in the second liquid phase that S103 is obtained, and adjusts pH value, stirs under the second preset condition equal
It is even, it is filtered after being cooled to crystallization later, isolated third liquid phase and third solid phase.Wherein, the second preset condition is specific
Are as follows: pH value is 4.3~4.7, and Baume angle value is 40~50, and temperature is greater than or equal to 90 DEG C, and the time is 30min~60min.
Preferably, in S101 and S103, cooling temperature is less than or equal to 30 DEG C；In S104, cooling temperature is equal
For less than or equal to 60 DEG C；In S103, controlling the Baume angle value in liquid phase concentration process is 40~50.
Preferably, add alkali adjusting to handle third liquid phase, later the raw material as third solid phase, repeat S103~S104's
Operation.Wherein, the temperature for adjusting processing is 70 DEG C~80 DEG C.
Preferably, in S101, the raw material components of the waste acid liquor after aluminum profile and aluminium alloy cleaning specifically: phosphatase 11 0~
12%, sulfuric acid 20~25% and Al3+30~50g/L；Either: phosphoric acid 8~12%, sulfuric acid 20~23%, nitric acid 0.5~
1% and Al3+30~50g/L.
In other words, processing method of the invention specifically includes: being added in spent acid in chemical products KOH progress and anti-
It answers；Al3+System is coagulant, is conducive to coagulating sedimentation；It is 6.5~7.5 in pH value, Baume angle value is 30~40, and temperature is 90 DEG C
It~100 DEG C, under conditions of the time is 40min~80min, is cooled down again after mixing evenly, is allowed to cool crystalline deposit.In temperature
At≤30 DEG C of degree, most of material all crystalline deposits separate feed liquid with centrifuge.The material isolated is done with vibrated fluidized bed
Dry device material drying at 70~80 DEG C after detection to be sampled, is packed and Water Soluble Compound fertilizer (main sulfur acid potassium) is made.Into one
The liquid on step ground, centrifuge separation is concentrated into Baume degrees Be ' 40~50 through triple effect steam inspissator, improves strength of fluid, a side
Face is that material remaining in liquid is passed through concentration, cooling, further removal；It on the other hand is to prepare for lower step process.It stirs
It mixes and is cooled to temperature≤30 DEG C, carry out secondary filter with flame filter press, isolate the liquid containing a small amount of sediment.It isolates
Sediment dried with the material of the first procedure, the liquid isolated add phosphoric acid carry out neutralization reaction, grasp Baume degrees
Be ' 40~50, adjust pH value 4.3~4.7,90 DEG C of temperature or more react 0.3~1 hour, stir crystallisation by cooling, temperature≤
60 DEG C with centrifuge separate feed liquid, by the material vibrating fluid bed dryer isolated at a temperature of 80~85 DEG C material drying,
It is packed after detection to be sampled is qualified, potassium dihydrogen phosphate product is made.Liquid after separation is warming up to 70~80 DEG C plus KOH, adjusts
PH value is 7, is all dissolved to feed liquid and after mixing evenly, returns to (enrichment process is concentrated together) and is recycled.
The fertilizer that the present invention obtains is fabricated to based on potassium sulfate, and containing the alkaline hydrated oxide on a small quantity based on aluminium salt
Fertilizer special for tea trees.Tea tree shows that tea tree is mixed in N-P-K three elements as a kind of rich aluminium and poly-aluminium plant, the experiment of agricultural university, Zhejiang University
Merge equipped with aluminium salt alkaline matter soil or Hydroponic Solution in it is more preferable than no aluminium ambient growth, aluminium to tea tree physiological effect performance
In the fertility for promoting root system, plant is strong, dark green leaf color, and chlorophyll content increases, net photosynthesis enhancing, CO2Assimilative capacicy
It improves, overground part growth is fast.Absorption and utilization that aluminium salt alkaline matter can promote tea tree to some nutrients are applied, can be promoted
Keep iron mobile to overground part, improves tea tree to Fe3+And Fe2+The absorption of-EDTA inhibits the harm of excess Mn.Although tealeaves
In contain higher aluminum amount, it is current studies have shown that aluminium content by drinking tea into human body, is not enough to the strong of harmful to human
Health, and also there is good effect to tea leaf quality.
It is illustrated With reference to embodiment:
Embodiment one
The present invention provides a kind of waste acid treatment method after aluminum profile and aluminium alloy cleaning, comprising the following steps:
S101: being added potassium hydroxide into the waste acid liquor after aluminum profile and aluminium alloy cleaning, is 6.5 in pH value, Baume
Angle value is 30, and temperature is 100 DEG C, and the time is that 50min is stirred for uniformly, being cooled to crystallization at 28 DEG C later.Wherein, aluminium profiles
The raw material components of waste acid liquor after material and aluminium alloy cleaning specifically: phosphatase 11 2%, sulfuric acid 20% and Al3+50g/L。
S102: the product that S101 is obtained is separated by solid-liquid separation, and obtains the first liquid phase and the first solid phase.
S103: the first liquid phase that S102 is obtained is concentrated, and controlling the Baume angle value in liquid phase concentration process is 40, it
After be cooled to crystallization after be filtered, isolated second liquid phase and second solid phase.
S104: being added phosphoric acid in the second liquid phase that S103 is obtained, and is 4.7 in pH value, Baume angle value is 47, temperature 95
DEG C, the time be 30min under conditions of stir evenly, be filtered after being cooled to crystallization later, isolated third liquid phase and the
Three solid phases.Third liquid phase is added to alkali adjusting processing at 80 DEG C later, as the raw material of third solid phase, repeats S103~S104's
Operation；
The solid phase is collected, is dried later, the first solid phase and second solid phase are potassium sulfate fertilizers；Third solid phase is di(2-ethylhexyl)phosphate
Hydrogen potassium product.
Embodiment two
The present invention provides a kind of waste acid treatment method after aluminum profile and aluminium alloy cleaning, comprising the following steps:
S101: being added potassium hydroxide into the waste acid liquor after aluminum profile and aluminium alloy cleaning, is 7.5 in pH value, Baume
Angle value is 33, and temperature is 95 DEG C, and the time is that 80min is stirred for uniformly, being cooled to crystallization at 30 DEG C later.Aluminum profile and aluminium
The raw material components of waste acid liquor after alloy cleaning specifically: phosphatase 11 0%, sulfuric acid 25% and Al3+30g/L。
S102: the product that S101 is obtained is separated by solid-liquid separation, and obtains the first liquid phase and the first solid phase.
S103: the first liquid phase that S102 is obtained is concentrated, and controlling the Baume angle value in liquid phase concentration process is 45, it
After be cooled to crystallization after be filtered, isolated second liquid phase and second solid phase.
S104: being added phosphoric acid in the second liquid phase that S103 is obtained, and is 4.3 in pH value, Baume angle value is 50, temperature 98
DEG C, the time be 60min under conditions of stir evenly, be filtered after being cooled to crystallization later, isolated third liquid phase and the
Three solid phases.Third liquid phase is added to alkali adjusting processing at 70 DEG C later, as the raw material of third solid phase, repeats S103~S104's
Operation；
The solid phase is collected, is dried later, the first solid phase and second solid phase are potassium sulfate fertilizers；Third solid phase is di(2-ethylhexyl)phosphate
Hydrogen potassium product.
Embodiment three
The present invention provides a kind of waste acid treatment method after aluminum profile and aluminium alloy cleaning, comprising the following steps:
S101: being added potassium hydroxide into the waste acid liquor after aluminum profile and aluminium alloy cleaning, is 7.0 in pH value, Baume
Angle value is 32, and temperature is 98 DEG C, and the time is that 70min is stirred for uniformly, being cooled to crystallization at 30 DEG C later.Wherein, aluminium profiles
The raw material components of waste acid liquor after material and aluminium alloy cleaning specifically: phosphatase 11 0%, sulfuric acid 22%, nitric acid 0.8% and Al3+
40g/L。
S102: the product that S101 is obtained is separated by solid-liquid separation, and obtains the first liquid phase and the first solid phase.
S103: the first liquid phase that S102 is obtained is concentrated, and controlling the Baume angle value in liquid phase concentration process is 43, it
After be cooled to crystallization after be filtered, isolated second liquid phase and second solid phase.
S104: being added phosphoric acid in the second liquid phase that S103 is obtained, and is 4.5 in pH value, Baume angle value is 48, temperature 97
DEG C, the time be 50min under conditions of stir evenly, be filtered after being cooled to crystallization later, isolated third liquid phase and the
Three solid phases.
Example IV
The present invention provides a kind of waste acid treatment method after aluminum profile and aluminium alloy cleaning, comprising the following steps:
S101: potassium hydroxide and flocculant PAM is added into the waste acid liquor after aluminum profile and aluminium alloy cleaning, in pH value
It is 7.0, Baume angle value is 32, and temperature is 98 DEG C, and the time is that 70min is stirred for uniformly, being cooled to crystallization at 30 DEG C later.
The molecular weight of flocculant PAM is 8,000,000, in use process, on weight of solution: prepare 0.3% concentration flocculant=1kg:
The ratio taken amount of 10mL, adding water and being diluted to concentration is 0.1% use.Wherein, the spent acid after aluminum profile and aluminium alloy clean is molten
The raw material components of liquid specifically: phosphatase 11 2%, sulfuric acid 20%, nitric acid 1% and Al3+30g/L。
S102: the product that S101 is obtained is separated by solid-liquid separation, and obtains the first liquid phase and the first solid phase.
S103: the first liquid phase that S102 is obtained is concentrated, and controlling the Baume angle value in liquid phase concentration process is 43, it
After be cooled to crystallization after be filtered, isolated second liquid phase and second solid phase.
S104: being added phosphoric acid in the second liquid phase that S103 is obtained, and is 4.5 in pH value, Baume angle value is 48, temperature 97
DEG C, the time be 50min under conditions of stir evenly, be filtered after being cooled to crystallization later, isolated third liquid phase and the
Three solid phases.
In addition, the advantage of technical solution in order to further illustrate the present invention, carries out following comparative example experiment.It needs to illustrate
It is that following comparative example carries out on the basis of embodiment three.
Comparative example one
The present invention provides a kind of waste acid treatment method after aluminum profile and aluminium alloy cleaning, comprising the following steps:
S101: being added sodium hydroxide into the waste acid liquor after aluminum profile and aluminium alloy cleaning, is 7.0 in pH value, Baume
Angle value is 32, and temperature is 98 DEG C, and the time is that 70min is stirred for uniformly, being cooled to crystallization at 30 DEG C later.Wherein, aluminium profiles
The raw material components of waste acid liquor after material and aluminium alloy cleaning specifically: phosphatase 11 0%, sulfuric acid 22%, nitric acid 0.8% and Al3+
40g/L。
S102: the product that S101 is obtained is separated by solid-liquid separation, and obtains the first liquid phase and the first solid phase.
S103: the first liquid phase that S102 is obtained is concentrated, and controlling the Baume angle value in liquid phase concentration process is 43, it
After be cooled to crystallization after be filtered, isolated second liquid phase and second solid phase.
S104: being added phosphoric acid in the second liquid phase that S103 is obtained, and is 4.5 in pH value, Baume angle value is 48, temperature 97
DEG C, the time be 50min under conditions of stir evenly, be filtered after being cooled to crystallization later, isolated third liquid phase and the
Three solid phases.
Comparative example two
The present invention provides the waste acid treatment method after a kind of cleaning of aluminum profile, comprising the following steps:
S101: potassium hydroxide and sodium hydroxide is added into the waste acid liquor after aluminum profile and aluminium alloy cleaning, in pH value
It is 7.0, Baume angle value is 32, and temperature is 98 DEG C, and the time is that 70min is stirred for uniformly, being cooled to crystallization at 30 DEG C later.
Wherein, the raw material components of the waste acid liquor after aluminum profile and aluminium alloy clean specifically: phosphatase 11 0%, sulfuric acid 22%, nitric acid
0.8% and Al3+40g/L。
S102: the product that S101 is obtained is separated by solid-liquid separation, and obtains the first liquid phase and the first solid phase.
S103: the first liquid phase that S102 is obtained is concentrated, and controlling the Baume angle value in liquid phase concentration process is 43, it
After be cooled to crystallization after be filtered, isolated second liquid phase and second solid phase.
S104: being added phosphoric acid in the second liquid phase that S103 is obtained, and is 4.5 in pH value, Baume angle value is 48, temperature 97
DEG C, the time be 50min under conditions of stir evenly, be filtered after being cooled to crystallization later, isolated third liquid phase and the
Three solid phases.
Comparative example three
The present invention provides the waste acid treatment method after a kind of cleaning of aluminum profile, comprising the following steps:
S101: being added sodium hydroxide into the waste acid liquor after aluminum profile and aluminium alloy cleaning, is 7.0 in pH value, Baume
Angle value is 32, and temperature is 98 DEG C, and the time is that 70min is stirred for uniformly, being cooled to crystallization at 30 DEG C later.Wherein, aluminium profiles
The raw material components of waste acid liquor after material and aluminium alloy cleaning specifically: phosphatase 11 5%, sulfuric acid 22%, nitric acid 0.8% and Al3+
40g/L。
S102: the product that S101 is obtained is separated by solid-liquid separation, and obtains the first liquid phase and the first solid phase.
S103: the first liquid phase that S102 is obtained is concentrated, and controlling the Baume angle value in liquid phase concentration process is 43, it
After be cooled to crystallization after be filtered, isolated second liquid phase and second solid phase.
S104: being added phosphoric acid in the second liquid phase that S103 is obtained, and is 4.5 in pH value, Baume angle value is 48, temperature 97
DEG C, the time be 50min under conditions of stir evenly, be filtered after being cooled to crystallization later, isolated third liquid phase and the
Three solid phases.
In addition, the effect of in order to preferably evaluate each embodiment fertilizer, carry out following experiment:
One, in each the first solid phase of embodiment effective component measurement
Applicant has found through many experiments, and the first, second solid phase property obtained in waste acid treatment process of the present invention can be with
It compares favourably with the potassium sulfate fertilizers quality in GB20406--2006.Specifically, according to GB20406--2006, each embodiment
One, the results are shown in Table 1 for second solid phase effective substance:
Active constituent content in each the first, second solid phase of embodiment of table 1
| K2O/% | Cl-/ % | H2O/% | Free acid/% | |
| Embodiment one | 50 | 0.8 | 0.4 | 0.9 |
| Embodiment two | 52 | 0.7 | 0.4 | 0.8 |
| Embodiment three | 53 | 0.8 | 0.3 | 0.8 |
| Example IV | 54 | 0.7 | 0.2 | 0.7 |
Two, in each embodiment third solid phase effective component measurement
Applicant has found through many experiments, and third solid phase property obtained in waste acid treatment process of the present invention can be with
Potassium dihydrogen phosphate product quality in HG2321--1992 compares favourably.Specifically, according to HG2321--1992, each embodiment third
The results are shown in Table 2 for solid phase effective substance:
Active constituent content in each embodiment third solid phase of table 2
| KH2PO4/ % | Cl-/ % | H2O/% | Water-insoluble/% | pH | |
| Embodiment one | 98.3 | 0.16 | 1.9 | 0.15 | 4.5 |
| Embodiment two | 98.2 | 0.17 | 2.0 | 0.17 | 4.6 |
| Embodiment three | 98.5 | 0.14 | 1.7 | 0.13 | 4.4 |
| Example IV | 98.9 | 0.13 | 1.5 | 0.12 | 4.3 |
Three, effect detection of each embodiment solid phase to tea tree growth situation
Specifically, selecting tea tree is experimental subjects.According to the Experimental Base that growth of tea plant environmental selection is suitable for, 10m is selected
8 test sample prescriptions are chosen as test sample prescription in the field of × 10m altogether, and each sample prescription chooses 100 tea trees.Test sample prescription 1~4
Solid phase fertilizer (solid phase mixing that is collected into each embodiment) of the embodiment one into example IV is applied, sample prescription 5~7 is tested
Solid phase fertilizer of the comparative example one into comparative example four is applied, test sample prescription 8 applies commercially available fertilizer special for tea trees, as a control group.It sees
The upgrowth situation of tea tree is examined, concrete outcome is as shown in table 3.
Influence list of each embodiment fertilizer of table 3 to growth of tea plant situation
| Plant height increase/% | Illness rate reduction/% | Sprout sprouting number increase/% | |
| Embodiment one | 28.58 | 20.27 | 35 |
| Embodiment two | 27.35 | 21.65 | 31 |
| Embodiment three | 30.06 | 20.73 | 35 |
| Example IV | 32.68 | 20.68 | 34 |
| Comparative example one | 8.26 | 10.93 | 12 |
| Comparative example two | 12.65 | 8.08 | 8 |
| Comparative example three | 10.59 | 5.06 | 10 |
Certainly, the case where enumerating in addition to embodiment one to example IV, the parameter etc. in other treatment processes is also can be with
's.
Waste acid treatment method non-wastewater discharge provided by the invention, no secondary residue generate；And by the PO in spent acid4 3-、
SO4 2-、NO3 -And Al3+It is recycled, effectively realizes recycling for resource, generate the higher economic benefit of added value.In addition,
The present invention uses thermal method neutralization reaction technology, and only water vapour distributes in production process, without " exhaust gas ", " waste water ", " waste residue " row
It puts, whole process realizes clean manufacturing.
In the description of the present invention, it is to be understood that, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance or implicitly indicates the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include one or more of the features.In the description of the present invention,
The meaning of " plurality " is two or more, unless otherwise specifically defined.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (1)
1. a kind of waste acid treatment method after aluminum profile and aluminium alloy cleaning, which comprises the following steps:
S101: the first substance is added into the waste acid liquor after aluminum profile and aluminium alloy cleaning, is stirred in the first preset condition
It mixes uniformly, is cooled to crystallization later；Wherein, first substance includes alkaline matter；First substance further includes flocculant；
And the alkaline matter selects potassium hydroxide；First preset condition specifically: pH value is 6.5~7.5, and Baume angle value is 30
~40, temperature is 90 DEG C~100 DEG C, and the time is 40min~80min；The temperature of the cooling is less than or equal to 30 DEG C；It is described
Aluminum profile and aluminium alloy cleaning after waste acid liquor raw material components specifically: phosphatase 11 0~12%, sulfuric acid 20~25% and
Al3+30~50g/L；Either: phosphoric acid 8~12%, sulfuric acid 20~23%, nitric acid 0.5~1% and Al3+30~50g/L；
S102: the obtained product of the S101 is separated by solid-liquid separation, the first liquid phase and the first solid phase are obtained；
S103: the first liquid phase that the S102 is obtained is concentrated, and controls the Baume angle value in liquid phase concentration process, Zhi Houleng
But it is filtered to after crystallizing, isolated second liquid phase and second solid phase；The temperature of the cooling is less than or equal to 30 DEG C；
Controlling the Baume degrees in the liquid phase concentration process is 40~50；
S104: phosphoric acid is added in the second liquid phase that the S103 is obtained and carries out neutralization reaction, pH value is adjusted, in the second default item
It stirs evenly, is filtered after being cooled to crystallization later, isolated third liquid phase and third solid phase under part；Wherein, described
Two preset conditions specifically: pH value is 4.3~4.7, and Baume angle value is 40~50, and temperature is greater than or equal to 90 DEG C, and the time is
30min~60min；The temperature of the cooling is less than or equal to 60 DEG C；
Add alkali adjusting to handle the third liquid phase, later the raw material as third solid phase, repeats the operation of S103~S104；
The temperature that described plus alkali adjusts processing is 70 DEG C~80 DEG C；
The solid phase is collected, is dried later, is used as fertilizer and phosphoric acid potassium salt product.
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| JP5051679B2 (en) * | 2003-08-29 | 2012-10-17 | 日本パーカライジング株式会社 | Alkali cleaning method for aluminum or aluminum alloy DI can |
| CN101746873B (en) * | 2009-12-02 | 2012-09-05 | 济南大学 | Method for removing nickel and chromium ions in section aluminum waste water |
| CN102826523A (en) * | 2012-09-24 | 2012-12-19 | 深圳市危险废物处理站有限公司 | Method for preparing fertilizer grade ammonium phosphate concentrated solution by utilizing phosphoric acid-nitric acid-acetic acid waste liquor |
| CN104556460B (en) * | 2013-10-12 | 2016-06-22 | 中国石油化工股份有限公司 | A kind of PSRY molecular sieve produces the fluorine removal phosphorus removing method of waste water |
| CN103539166B (en) * | 2013-10-31 | 2015-11-25 | 洛阳氟钾科技股份公司 | Potassium felspar sand is utilized to produce the method for saltpetre |
| CN103950961A (en) * | 2014-04-04 | 2014-07-30 | 中国科学院过程工程研究所 | Method for preparing aluminum hydroxide from industrial waste residue generated in aluminum alloy surface treatment |
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