CN105271435B - Seamless steel pipe pickle liquor prepares the production technology of polyaluminium ferric flocculant - Google Patents
Seamless steel pipe pickle liquor prepares the production technology of polyaluminium ferric flocculant Download PDFInfo
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- CN105271435B CN105271435B CN201510640840.9A CN201510640840A CN105271435B CN 105271435 B CN105271435 B CN 105271435B CN 201510640840 A CN201510640840 A CN 201510640840A CN 105271435 B CN105271435 B CN 105271435B
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- steel pipe
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- C01—INORGANIC CHEMISTRY
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- C01G49/00—Compounds of iron
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Abstract
The present invention relates to the production technology that a kind of seamless steel pipe pickle liquor prepares polyaluminium ferric flocculant, using seamless steel pipe pickling waste hydrochloric acid containing iron liquid as raw material, using step-by-step oxidation mode, that is the starting stage is using air or oxygen oxidation, nitric acid catalyst, later stage is aoxidized using sym-closene oxidant, fully and completely, transformation efficiency is high for reaction；Isopropanolamine is used for stabilizer, product quality is stable, function admirable；The product iron content prepared by this law is up to more than 11.6%, and basicity more than 16.8%, stability is good, carries out floc test to simulated wastewater and urban domestic wastewater, turbidity removal rate is up to more than 90.0%, with preferable purifying water effect.This technique prepares polyaluminium ferric flocculant at normal temperatures and pressures, and without external heat, energy consumption is small, technique is simple, the environmentally friendly purpose of " treatment of wastes with processes of wastes against one another, turn waste into wealth " is can reach, the cyclic utilization of waste is realized, and good economic benefit and social benefit can be produced.
Description
Technical field
Poly-ferric chloride system is prepared the present invention relates to the preparation method of water treatment agent, more particularly to seamless steel pipe pickle liquor
The production technology of coagulant.
Background technology
Seamless steel pipe needs to carry out degreasing, washing, pickling, washing, white picking, neutralization, passivation, washing in process
Etc. a series of chemical treatment technologies；Wherein pickling is frequently with cheap hydrochloric acid, in acid cleaning process, the salt in hydrochloric acid lotion
Acid is constantly consumed, while ferrous ion therein is also constantly increasing with the consumption of hydrochloric acid, is produced therefrom a large amount of
Iron ion bearing scrap acid solution, it constitutes general chloride containing ferrous iron 10%~14%, and hydrogen chloride is 3%~5%；Typically often wash 50 tons of nothings
Stitch steel pipe and discharge one ton of ferrous waste acid liquid, if based on 300,000 tons of seamless steel pipes are produced per year, there are more than about 6000 tons high concentration iron content
Hydrochloride waste is produced；Along with electroplating industry, the acid pickle of the generation such as steel plate processing industry, estimation total amount is more than 10000 tons.
For the ferrous waste acid liquid of this high concentration, such as without appropriate processing, it will severe contamination environment, therefore acid pickle processing skill
Art is also an important task.Economic, environmental protection, practical processing method are not yet found at present, with China environmental protection method
Strict to implement, the processing discharge of acid pickle has seriously govern health, the sustainable development of steel pipe industry.If these spent acid are had
Effect is reclaimed or regeneration, is produced value product, environmental pollution can be not only reduced, while the wave of resource can be reduced
Take, will be a good thing benefited the nation and the people.
Poly-ferric chloride is a kind of polymer inorganic, to the good purification of water quality.Not only there is safe inanimate object poison
Property, and the alumen ustum big structure formed is closely knit, consumption is few, sedimentation is fast, the advantages of dehydration property is good, and it is low particularly with handling
Temperature, low turbidity waste water are advantageous.It can be widely used for ground water cleaning, printing and dyeing, papermaking, coal washing, food, leather-making industrial wastewater and city
The processing of city's sanitary sewage, has higher removal efficiency to various harmful elements in water, is at a kind of all good water of combination property
Manage agent product, wide market.
Because pickle liquor contains the iron ion and hydrochloric acid of a certain amount of reusable edible, therefore it is that one kind prepares polyaluminium
The desirable feedstock of iron coagulant, such as utilizes ferrous waste acid liquid, polymeric iron system water process is prepared by series of chemical conversion
With coagulant, so as to reach ferrous waste acid liquid recycling, turn waste into wealth, both protect environment, economic benefit is added again,
Also the development of local economy is driven.
It is a kind of extremely strong oxidant and chlorine that sym-closene, which is also known as three chloro- (1H, 3H, 5H) triketones of s-triazine 2,4,6,
Agent, with sterilization, bleaching and disinfective action, has killing action to bacterium, virus, fungi, gemma etc..
Chinese patent document CN1266889A is disclosed using hydrochloric acid iron and steel pickling waste liquid as main production raw material, using steady
Fixed, method for oxidation prepares high-concentration stable poly-ferric chloride coagulant and its production technology, free according to hydrochloric acid pickling waste liquor
Acid content and iron-holder, using iron filings dissolving adjustment total iron content, then introduce appropriate polymerization stabilizer, in stabilizer and iron
After salting liquid fully reacts, add polymeric oxygen agent and carry out oxidative polymerization and basicity is adjusted with hydrochloric acid, finally give
High-concentration stable polyiron chloride flocculant.But, the technique uses substantial amounts of chlorate, and is changed into salt after chlorate reduction
Hydrochlorate, adds system salt content.Chinese patent document CN101462776A discloses a kind of preparation method of poly-ferric chloride,
Iron content pickle or waste hydrochloric acid are placed in reaction kettle device, while adding iron powder or iron filings, with iron exothermic reaction production occurs for acid
Raw heat energy is preheated to material, is then added catalyst and is passed through oxygen, is then turned on circulating pump, reaction solution is circulated 3-5 small
When, reaction to be polymerized is complete；Reaction solution is transferred to precipitation tank for precipitation or product is separated and is enriched with filter type.But
It is that this method prepares poly-ferric chloride using oxygen as oxidant, and the reaction time is long, not environment friendly type catalyst-Asia need to be added
Sodium nitrate or potassium, can produce secondary pollution.Chinese patent document CN1789147A discloses one kind pickle liquor and prepares polymerization
The method of iron chloride, be specially：By hydrochloric acid pickling waste liquor, concentrated nitric acid and concentrated hydrochloric acid are added in corrosion resistant reactor, 1.0~
Under conditions of 3.0 standard atmospheric pressures and persistently logical oxygen, control temperature is reacted 40~90 minutes at 50~120 DEG C, and polymerization is made
Chlorination iron product.But, this method needs boiler to be heated to 90-95 DEG C, and power consumption is big.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides one kind and uses seamless steel pipe pickle liquor, prepares at normal temperatures and pressures
The method of polyaluminium ferric flocculant.
This law is bright using seamless steel pipe pickle liquor as raw material, using step-by-step oxidation mode, i.e. starting stage using air or
Dioxygen oxidation, nitre acid as catalyst, and control air or oxygen throughput；Later stage carries out oxygen using sym-closene oxidant
Change；And use isopropanolamine to prepare polyaluminium ferric flocculant for stabilizer, at normal temperatures and pressures.The inventive method energy-saving ring
Protect, the product iron content of preparation reaches more than 11.6wt%, and basicity 16.8%, stability is good, with preferable purifying water effect.It is right
Simulated wastewater and urban domestic wastewater carry out processing experiment, and turbidity removal rate is up to more than 90.0%.
Technical scheme is as follows：
A kind of seamless steel pipe pickle liquor prepares the production technology of polyaluminium ferric flocculant, including step is as follows：
(1) after seamless steel pipe pickle liquor is filtered, it is 7~15wt% to adjust HCl contents in waste liquid with hydrochloric acid, at room temperature
Air or oxygen is passed through, catalyst is added, 4~8h is reacted at room temperature；
(2) sym-closene is added, continues to react 1~5h, then adds stabilizer, filter, filtrate is polymerization chlorine
Change ferric flocculant.
, according to the invention it is preferred to, it is 8~12wt% to adjust HCl contents in waste liquid with hydrochloric acid in step (1)；
It is preferred that, the throughput of air is seamless steel pipe pickle liquor 960~2400 per ton, further preferred 1200~
2400 liters；Oxygen ventilation amount is seamless steel pipe pickle liquor 960~2400 per ton, further preferred 960~1500 liters；
It is preferred that, air vent speed is 2~5 liters/min, and oxygen ventilation speed is 1~2 liter/min；
It is preferred that, the nitric acid that described catalyst is 10~40wt%, it is further preferred that the addition of catalyst is anti-
Answer the 0.2~2% of liquid gross mass.
, according to the invention it is preferred to, the total iron content of the seamless steel pipe pickle liquor described in step (1) for 16.0~
18.0wt%, HCl content are 4.0~6.0wt%；It is further preferred that in total iron content：Fe3+Content is 2.0~4.0wt%,
Fe2+Content is 12.0~15.0wt%.
, according to the invention it is preferred to, the consumption of the sym-closene described in step (2) is seamless steel pipe pickle liquor
3~10wt% of total amount；
It is preferred that, described stabilizer is isopropanolamine, it is further preferred that the addition of stabilizer is seamless steel pipe acid
Wash 0.1~1wt% of waste liquid total amount.
The present invention has the following advantages compared with prior art：
1. using step-by-step oxidation technique, i.e., with air or oxygen it is first that oxidant is aoxidized, then use sym-closene
Aoxidized for oxidant, fully and completely, transformation efficiency is high for reaction；
2. the catalyst aoxidized using nitric acid as air or oxygen, without using natrium nitrosum or potassium, it is to avoid produce secondary
Pollution；
3. using isopropanolamine used as stabilizers, product quality is stable, function admirable；
4. using being reacted at room temperature, without external heat, energy consumption is small, small investment, technique is simple, can reach " with useless
Control it is useless, turn waste into wealth " environmentally friendly purpose, realize the cyclic utilization of waste, and good economic benefit and social benefit can be produced.
Embodiment
Below by specific embodiment, the present invention will be further described, but not limited to this.
The total iron content of seamless steel pipe pickle liquor used is 17.0wt% in embodiment, wherein：Fe3+Content is
3.0wt%, Fe2+Content is 14.0wt%；HCl contents are 5.0wt%.
Embodiment 1
By 4000 kilograms of seamless steel pipe pickle liquors through sedimentation, filtering, with it is acidproof be pumped into it is acidproof anti-to 6 cubic metres of enamel
Answer in kettle, it is 10wt% to add HCl contents in 1000 kilograms of technical hydrochloric acids (36wt%), adjustment solution；Stirring is started, control is stirred
Speed is mixed for 60 revs/min, 36wt% 25 kilograms of nitric acid (accounting for reaction solution total amount 0.5wt%) is added at room temperature as catalysis
Agent；Air, oxidation reaction 6 hours are passed through with 3 liters/min of speed；Add 250 kilograms of sym-closenes (total for reaction solution
The 5w% of amount), continue oxidation reaction 3 hours, the throughput of air is 1440 liters of reaction solution per ton；After oxidation reaction terminates, plus
Enter 25 kilograms of (0.5w% for accounting for reaction solution total amount) isopropanolamines as stabilizer, acidproof storage will be transferred to after reacting liquid filtering
Tank, produces polyaluminium ferric flocculant.After measured in product, iron content is 11.9wt%, and basicity is 17.0%.
Embodiment 2
By 4000 kilograms of seamless steel pipe pickle liquors through sedimentation, filtering, with it is acidproof be pumped into it is acidproof anti-to 6 cubic metres of enamel
Answer in kettle, add 1000 kilograms of technical hydrochloric acids (36wt%), it is 10wt% to control HCl contents in solution；Start stirring, stirring speed
80 revs/min of degree control, adds 36wt% 50 kilograms of nitric acid (accounting for reaction solution total amount 1wt%) as catalyst at room temperature；With 2
Liter/min speed is passed through oxygen and carries out oxidation reaction 6 hours；250 kilograms of sym-closenes are added (for reaction solution total amount
5wt%) continue oxidation reaction 3 hours, the throughput of oxygen is 960 liters of reaction solution per ton；After oxidation reaction terminates, 25 are added public
Jin (accounting for reaction solution total amount 0.5wt%) isopropanolamine will be transferred to resistance to acid storage tank, produce poly- as stabilizer after reacting liquid filtering
Close chloride series coagulant.After measured in product, iron content is 12.2wt%, and basicity is up to 17.2%.
Embodiment 3
By 4000 kilograms of seamless steel pipe pickle liquors through sedimentation, filtering, with it is acidproof be pumped into it is acidproof anti-to 6 cubic metres of enamel
Answer in kettle, add 1000 kilograms of technical hydrochloric acids (36wt%), it is 10wt% to control HCl contents in solution；Start stirring, stirring speed
80 revs/min of degree control, adds 36wt% 75 kilograms of nitric acid (accounting for reaction solution total amount 1.5wt%) as catalyst at room temperature；
Oxygen, which is passed through, with 2 liters/min of speed carries out oxidation reaction 6 hours；Add 150 kilograms of sym-closenes (total for reaction solution
The 3wt% of amount) continue oxidation reaction 3 hours, the throughput of oxygen is 960 liters of reaction solution per ton；Add 25 kilograms and (account for reaction solution
Total amount 0.5wt%) isopropanolamine is as stabilizer, and after filtering, reaction solution is transferred to resistance to acid storage tank, poly-ferric chloride system is produced
Coagulant.After measured in product, iron content is 12.6wt%, and basicity is 17.4%.
Embodiment 4
By 4000 kilograms of seamless steel pipe pickle liquors through sedimentation, filtering, with it is acidproof be pumped into it is acidproof anti-to 6 cubic metres of enamel
Answer in kettle, add 1000 kilograms of technical hydrochloric acids (36wt%), it is 8wt% to control HCl contents in solution；Start stirring, stirring speed
80 revs/min of degree control, adds 36wt% 10 kilograms of nitric acid (accounting for reaction solution total amount 0.2wt%) as catalyst at room temperature；
Oxygen, which is passed through, with 2 liters/min of speed carries out oxidation reaction 6 hours；Add 500 kilograms of sym-closenes (total for reaction solution
The 10wt% of amount) continue oxidation reaction 3 hours, the throughput of oxygen is 960 liters of reaction solution per ton；Add 5 kilograms and (account for reaction solution
Total amount 0.1wt%) isopropanolamine is as stabilizer, and after filtering, reaction solution is transferred to resistance to acid storage tank, poly-ferric chloride system is produced
Coagulant.
Embodiment 5
By 4000 kilograms of seamless steel pipe pickle liquors through sedimentation, filtering, with it is acidproof be pumped into it is acidproof anti-to 6 cubic metres of enamel
Answer in kettle, add 1000 kilograms of technical hydrochloric acids (36wt%), it is 12wt% to control HCl contents in solution；Start stirring, stirring speed
80 revs/min of degree control, adds 36wt% 100 kilograms of nitric acid (accounting for reaction solution total amount 2wt%) as catalyst at room temperature；With
2 liters/min of speed are passed through oxygen and carry out oxidation reaction 6 hours；It (is reaction solution total amount to add 400 kilograms of sym-closenes
8wt%) continue oxidation reaction 3 hours, the throughput of oxygen is 960 liters of reaction solution per ton；Add 50 kilograms and (account for reaction solution total
Measure 1wt%) isopropanolamine is as stabilizer, and after filtering, reaction solution is transferred into resistance to acid storage tank, produces poly-ferric chloride system coagulation
Agent.
Experimental example
By the polymerization ferric flocculant prepared by embodiment 1~3 to simulated wastewater and urban domestic wastewater floc test, knot
Fruit is listed in Tables 1 and 2.
The measure of iron content and basicity is with reference to HG/T 4672-2014；
Waste water flocculating is tested, and step is as follows：
1. simulated wastewater formula
By 1:1 running water and distilled water is made into the suspended water sample of simulation that kaolin (clay) content is 100mg/L, vibration
After shaking up, 48h is stood, the volumetric flask for then taking the turbid liquid in upper strata to pour into 1000mL obtains simulated water sample, and its turbidity is about 78NTU,
PH=7.1.
2. the flocculating effect of obtained coagulant is tested using jar test
(1) take waste water water sample 50mL to entering in 500mL beakers, add deionized water and be diluted to 500mL, add at room temperature
Quantitative Polyferric Sulfate, changes the pH value (6,7,8) of waste water, first quickly stirs 1min with 150r/min；Again respectively successively with 60r/min
Slowly 5min is stirred；40r/min stirs 5min slowly；25r/min stirs 5min slowly；Stand after 30min；Observe the change of waste water, record flocculation
Speed, alumen ustum size, the transparency of supernatant；Supernatant liquor is taken to be used to survey turbidity value.
(2) take waste water water sample 50mL to entering in 500mL beakers, add deionized water and be diluted to 500mL, add at room temperature
Quantitative Polyferric Sulfate, adjusts the pH value of waste water, first quickly stirs 1min with 150r/min；Stirred slowly with 60r/min successively respectively again
5min；40r/min stirs 5min slowly；25r/min stirs 5min slowly；Stand after 30min；The change of observation waste water, record flocculation rate,
Alumen ustum size, the transparency of supernatant；Supernatant liquor is taken to be used to survey turbidity value.
3. turbidity value is determined
Turbidimetric analysis turbidimetry uses the spectrophotometer method (spectrophotometer methods of GB 13200-1991 [S] Beijing：Chinese Industrial Standards (CIS)
Publishing house, 2001), then turbidity value is obtained by turbidity standard curve.
Table 1. polymerize ferric flocculant and turbid result of the test is gone to simulated wastewater with commercially available poly-ferric chloride
Note：(1) polymerization ferric flocculant and commercially available polyaluminium iron content are 30.0wt%；
(2) coagulant addition is 50mg/L waste water；
(3) wastewater pH=8.0 are adjusted.
As seen from Table 1, in simulated wastewater, polymerization ferric flocculant sample is added, addition is 50mg/L, pH=
When 8.0, turbidity removal rate average out to 91.5%, the alumen ustum of generation is larger, and sinking speed is fast；With commercially available poly-ferric chloride flocculability
Can be similar, it is known that, the polyaluminium ferric flocculant that the present invention is prepared using seamless steel pipe pickle liquor has good
Flocculating effect.
Table 2. polymerize ferric flocculant and turbid result of the test is gone to urban domestic wastewater with commercially available poly-ferric chloride
Note：(1) polymerization ferric flocculant and commercially available polyaluminium iron content are 30.0wt%；
(2) coagulant addition is 50mg/L waste water；
(3) with Liaocheng City urban domestic wastewater treatment plant wastewater treatment object, wastewater pH=7.5 are adjusted.
As seen from Table 2, using Liaocheng City sanitary wastewater treatment plant's waste water as process object, above-described embodiment is added made
Standby polymerization ferric flocculant sample, as a result shows：Coagulant amount of samples is 50mg/L, when pH is 7.5, and turbidity removal rate is put down
It is 91.7%；The alumen ustum generated that flocculates simultaneously is larger, and sinking speed is fast, and turbidity removal effect is good；With commercially available poly-ferric chloride water purification
Effect is similar, it is known that, the polyaluminium ferric flocculant that the present invention is prepared using seamless steel pipe pickle liquor has good
Flocculating effect.
The general principle and principal character and advantages of the present invention of invention has been shown and described above.The technology people of the industry
Member is it should be appreciated that the present invention is not limited to the above embodiments, and the description in above-described embodiment and specification is to illustrate this hair
Bright principle, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
With improve all within the scope of the claimed invention, the claimed scope of the invention is by appended claims and its equivalent
Thing is defined.
Claims (4)
1. a kind of seamless steel pipe pickle liquor prepares the production technology of polyaluminium ferric flocculant, including step is as follows：
(1) after seamless steel pipe pickle liquor is filtered, it is 7~15wt% to adjust HCl contents in waste liquid with hydrochloric acid, is passed through at room temperature
Air or oxygen, adds catalyst, and 4~8h is reacted at room temperature；
Described catalyst is 10~40wt% nitric acid, and the addition of catalyst is the 0.2~2% of reaction solution gross mass；
The throughput of air is 960~2400 liters of seamless steel pipe pickle liquor per ton；Oxygen ventilation amount is seamless steel pipe per ton acid
Wash 960~2400 liters of waste liquid；
(2) sym-closene is added, continues to react 1~5h, then adds stabilizer, filter, filtrate is poly-ferric chloride
It is coagulant；
The consumption of described sym-closene is 3~10wt% of seamless steel pipe pickle liquor total amount；
Described stabilizer is isopropanolamine, and the addition of stabilizer is 0.1~1wt% of seamless steel pipe pickle liquor total amount.
2. the production technology according to claim 1 for preparing polyaluminium ferric flocculant, it is characterised in that step (1)
HCl contents are 8~12wt% in the middle regulation waste liquid with hydrochloric acid.
3. the production technology according to claim 1 for preparing polyaluminium ferric flocculant, it is characterised in that step (1)
Described in seamless steel pipe pickle liquor total iron content be 16.0~18.0wt%, HCl contents be 4.0~6.0wt%.
4. the production technology according to claim 3 for preparing polyaluminium ferric flocculant, it is characterised in that step (1)
In the total iron content of described seamless steel pipe pickle liquor：Fe3+Content is 2.0~4.0wt%, Fe2+Content be 12.0~
15.0wt%.
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| CN201510640840.9A CN105271435B (en) | 2015-10-06 | 2015-10-06 | Seamless steel pipe pickle liquor prepares the production technology of polyaluminium ferric flocculant |
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| CN105502516B (en) * | 2016-02-04 | 2017-06-20 | 天津大学 | A kind of method that poly-iron chloride is prepared by iron and steel pickling waste liquid |
| CN110316766A (en) * | 2019-07-17 | 2019-10-11 | 中信环境技术（广州）有限公司 | A kind of method of two-stage oxidizing waste hydrochloric acid containing iron preparation chlorination iron product |
| CN112299471B (en) * | 2020-11-25 | 2022-02-15 | 中南大学 | Method for synchronously preparing nano zinc oxide by efficiently separating zinc from zinc-containing electronic waste |
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| CN1266819A (en) * | 1999-03-11 | 2000-09-20 | 中国科学院生态环境研究中心 | Flocculant of polyiron chloride prepared from waste hydrochloric acid as pickling liquid of iron and steel and its preparing process |
| CN100335418C (en) * | 2005-11-07 | 2007-09-05 | 暨南大学 | Method for preparing ferric chloride by spent pickling solution |
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