CN104925890B - A kind of Refinery Wastewater middle and high concentration ammonia nitrogen method - Google Patents
A kind of Refinery Wastewater middle and high concentration ammonia nitrogen method Download PDFInfo
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Abstract
A kind of method that the invention discloses Refinery Wastewater ammonia nitrogen, belongs to environmental protection friendly ammonia nitrogen waste water process field.The present invention is prepared by magnesium-aluminum-iron brucite, magnetization, modified, the steps such as drying and activation have obtained a kind of organic composite denitrifier modification magnesium-aluminum-iron brucite magnetic nano adsorption material, this material Refinery Wastewater middle and high concentration ammonia nitrogen, not only treatment effeciency is high, and produce without ammonia and precipitation generation, can come off the most layer by layer after crucial modified brucite absorption ammonia nitrogen, without regeneration, residue moisture-free after coming off, volume is little, it is that a kind of environmental protection friendly ammonia nitrogen waste water processes material, finally measuring ammonia-nitrogen content in wastewater effluent is below 0.2mg/L, nitric efficiency reaches more than 99.99%.
Description
Technical field
The invention discloses a kind of refinery(waste) water middle and high concentration ammonia nitrogen method, belong to sewage treatment area.
Background technology
Refinery(waste) water mostlys come from cracking and distillation and some fraction of the straight run distillation of crude oil, mink cell focus
Refined grade during produce production waste water, wherein ammonia nitrogen in high density can change into nitrous under certain condition
Hydrochlorate, if long-term drink, the nitrite in water will form nitrosamine with protein bound, and this is a kind of strong
Carcinogen, totally unfavorable to health, the activity of microorganism there is is inhibitory action.
At present, the method for Refinery Wastewater middle and high concentration ammonia nitrogen has break point chlorination, selective ion exchange
Method, air stripping method and vaporizing extract process etc.；Such as Publication No. CN102060399A, entitled " organic composite
Denitrifier process high-concentration ammonia nitrogenous wastewater except ammonia nitrogen device ", this patent by add organic Composite denitrification agent go
Except high-concentration ammonia nitrogen in waste water, although present device is simple, runs easy and simple to handle, ammonia nitrogen in high density is given up
The nitric efficiency of water reaches more than 99.99%, but the present invention is to combine with blow-off method, and ammonia can be caused to enter
Enter air and cause secondary pollution.
Summary of the invention
The technical problem that present invention mainly solves: combine blow-off method at height for current organic composite denitrifier
There is ammonia emission in concentration ammonia nitrogen wastewater processing procedure, causes secondary environmental pollution problem, it is provided that a kind of organic
Composite denitrification agent modification magnesium-aluminum-iron hydrotalcite nano magnetic adsorptive material, adsorbs high-concentration ammonia nitrogen in waste water, and full
The aging adsorbing material top layer of energy after with, under externally-applied magnetic field and current scour effect, it is achieved the renewal of adsorbing material,
Without regeneration.
In order to solve the secondary pollution problem failing to solve to cause that said method exists, it is provided that a kind of organic multiple
Close denitrifier modification magnesium-aluminum-iron brucite magnetic nano adsorption material and process the method for ammonia nitrogen in agricultural chemicals waste water, this
Bright solve original technology organic composite denitrifier combine blow-off method process high-concentration ammonia nitrogenous wastewater time due to ammonia
The secondary pollution problem that discharge causes.
In order to solve the problems referred to above, the technical solution adopted in the present invention is: in a kind of Refinery Wastewater
Ammonia nitrogen in high density method, it is characterised in that organic composite denitrifier modification magnesium-aluminum-iron brucite magnetic Nano adsorption material
Material preparation process is:
(1) prepared by magnesium-aluminum-iron brucite: weigh 5.1～10.4g magnesium nitrates, 2.5～6.7g aluminum nitrate respectively, 4.21～
2.6g ferric nitrate is dissolved in the 260～600ml ethanol solutions containing 3.57～7.2g carbamide；Under room temperature
Stirring 1h；Pour into and hydrothermal reaction kettle is heated to 140 DEG C, react 8～12h；The room temperature of cooling；Use ethanol
At 60 DEG C, it is dried 8h after cleaning three times with deionized water, obtains nano magnalium molten iron Talcum；
(2) magnetization: by the nano magnalium molten iron Talcum of above-mentioned preparation successively with the concentrated hydrochloric acid that mass concentration is 36.5% and
Saturated potassium hydroxide solution soaks 7h, is placed in Muffle furnace, dries at temperature is 105 DEG C, near magnetic field
Magnetization；
(3) modified: the nano magnalium molten iron talc materials after pickling, alkali leaching and magnetization to be immersed 10～30g organic
In Composite denitrification agent, stir 25～50min；
(4) dry: modified nano magnalium molten iron talc materials deionized water is cleaned 3 times, protect at nitrogen
Under the conditions of dry；
(5) activation: calcine 4～6h at temperature is 800 DEG C～900 DEG C,.
Described organic composite denitrifier is nicotine, salicylide, three kinds of materials of crotonic aldehyde, counts in mass ratio,
10%～30% nicotine, 20%～45% salicylide, 25%～70%2-crotonaldehyde.
A kind of Refinery Wastewater middle and high concentration ammonia nitrogen method, it is characterised in that concrete application process is:
(1) by the organic composite denitrifier modification magnesium-aluminum-iron brucite magnetic nano adsorption material for preparing with gluing
Agent 5:1 in mass ratio is made into viscous fluid, and viscous fluid spray gun is uniformly sprayed on polytetrafluoroethylplastic plastic sheet top layer,
Every layer of plastic sheet thickness is 4～10cm；
(2), after the plastic sheet being jetted through viscous fluid being dried 10～30min under ventilation state, vertical superposition is placed in suction
In attached tower, superimposed layer height is 25～55cm, and the alternate space height of interlayer is 30～65cm, allows ammonia nitrogen concentration
Be 1500～8000mg/L refinery(waste) water flow through in adsorption tower, flow speed control 5～10m3/ h, the time of staying
It is 20～60min；
(3) organic composite denitrifier modification magnesium-aluminum-iron brucite magnetic nano adsorption material absorption ammonia nitrogen, along with absorption
Constantly tending to saturated, viscous solution starts aging, occurs coming off layer by layer；
(4) under the souring of refinery(waste) water current, aging nano adsorption material top layer is fallen at the bottom of tower, and
Separate under externally-applied magnetic field effect.
Described adhesive is by weight ratio: 15 parts of polyvinyl alcohol, 20 parts of carboxymethyl starches, 35 parts
Graphene and 30 parts of waterglass.
The principle of the present invention is: it is big that magnesium-aluminum-iron hydrotalcite material has specific surface area, belongs to mesoporous material material,
In organic composite denitrifier is modified to waste water, ammonia nitrogen has absorption property, it is often more important that, organic composite takes off
The addition of nitrogen agent, it is possible to make adsorbing material absorption ammonia nitrogen reach saturated after can come off the most layer by layer, it is achieved absorption
The renewal of material surface, the again ammonia nitrogen in high density in absorption waste water, and the residue after coming off is in current scour
Separate with externally-applied magnetic field effect.
The invention has the beneficial effects as follows:
(1) produce without ammonia, be not result in secondary environmental pollution；
(2) washing away with under externally-applied magnetic field effect at percolate current, aging adsorbing material top layer comes off layer by layer
Adsorbing material is without regeneration；
(3) after coming off, residue is little without moisture, volume, separable under externally-applied magnetic field, adsorbing material without regeneration,
Clearance is high, low cost.
Detailed description of the invention
Preparation method
Weighing 5.1～10.4g magnesium nitrates, 2.5～6.7g aluminum nitrate the most respectively, 4.2～12.6g ferric nitrates dissolve
In the 260～600ml ethanol solutions containing 3.5～7.2g carbamide, stir 1h under room temperature, pour water into
Being heated to 140 DEG C in thermal response still, the room temperature of cooling after reaction 8～12h, then with ethanol and deionized water
At 60 DEG C, it is dried 8h after cleaning one time, obtains nano magnalium molten iron Talcum, then the nanometer Mg by above-mentioned preparation
Ferro-aluminum brucite soaks 7h with the concentrated hydrochloric acid that mass concentration is 36.5% and saturated potassium hydroxide solution successively, is placed in
After in Muffle furnace at temperature is 105 DEG C dry, then near magnetic field magnetize, then will through pickling, alkali leaching and
Nano magnalium molten iron talc materials after magnetization immerses in 10～30g organic composite denitrifiers, stirring 25～
Again modified nano magnalium molten iron talc materials deionized water is cleaned 3 after 50min, protect at nitrogen
Under the conditions of dry after at temperature is 800 DEG C～900 DEG C calcine 4～6h, described organic composite denitrifier is
Nicotine, salicylide, three kinds of materials of crotonic aldehyde, count in mass ratio, 10%～30% nicotine, 20%～
45% salicylide, 25%～70%2-crotonaldehyde.
Application process
First by the organic composite denitrifier modification magnesium-aluminum-iron brucite magnetic nano adsorption material for preparing with gluing
Agent 5:1 in mass ratio is made into viscous fluid, and viscous fluid spray gun is uniformly sprayed on polytetrafluoroethylplastic plastic sheet top layer,
Every layer of plastic sheet thickness is 4～10cm, then by be jetted through the plastic sheet of viscous fluid be dried under ventilation state 10～
After 30min, vertical superposition is placed in adsorption tower, and superimposed layer height is 25～55cm, the alternate space height of interlayer
Being 30～65cm, the refinery(waste) water allowing ammonia nitrogen concentration be 1500～8000mg/L flows through in adsorption tower, flow velocity control
System 5～10m3/ h, the time of staying is 20～60min, then by organic composite denitrifier modification magnesium-aluminum-iron neatly
Stone magnetic nano adsorption material absorption ammonia nitrogen, along with absorption constantly tends to saturated, viscous solution starts aging, occurs
Coming off layer by layer, finally under the souring of refinery(waste) water current, tower is fallen on aging nano adsorption material top layer
The end, and separate under additional the action of a magnetic field, described adhesive is by weight ratio: 25 parts of poly-second
Enol, 20 parts of carboxymethyl starches, 25 parts of Graphenes and 30 parts of waterglass.
Example 1
Weighing 5.1g magnesium nitrate, 2.5g aluminum nitrate the most respectively, 4.2g ferric nitrate is dissolved in 260ml and contains 3.52g
In the ethanol solution of carbamide, stir 1h under room temperature, pour into and hydrothermal reaction kettle is heated to 140 DEG C, reaction
The room temperature of cooling after 8.5h, is dried 8h at 60 DEG C, obtains after then cleaning one time with ethanol and deionized water
Nano magnalium molten iron Talcum, then be 36.5% by mass concentration successively by the nano magnalium molten iron Talcum of above-mentioned preparation
Concentrated hydrochloric acid and saturated potassium hydroxide solution soak 7h, after being placed in Muffle furnace at temperature is 105 DEG C dry,
Then magnetize near magnetic field, then the nano magnalium molten iron talc materials after pickling, alkali leaching and magnetization is immersed
In 10g organic composite denitrifier, wherein comprise 1g nicotine, 2g salicylide, three kinds of materials of 7g2-crotonaldehyde
Again modified nano magnalium molten iron talc materials deionized water is cleaned 3, at nitrogen after stirring 33min
At temperature is 870 DEG C, 4.6h, the organic composite denitrifier that will prepare is calcined after drying under protective condition
Modified magnesium-aluminum-iron brucite magnetic nano adsorption material is made into viscous fluid, by sticky with adhesive 5:1 in mass ratio
Liquid spray gun is uniformly sprayed on polytetrafluoroethylplastic plastic sheet top layer, and every layer of plastic sheet thickness is 4cm, then will be jetted through sticking
After the plastic sheet of magma is dried 30min under ventilation state, vertical superposition is placed in adsorption tower, superimposed layer height
For 25cm, the alternate space height of interlayer is 30cm, and the refinery(waste) water allowing ammonia nitrogen concentration be 1500mg/L flows through suction
In attached tower, flow speed control 5m3/ h, the time of staying is 20min, then by organic composite denitrifier modification magnalium
Molten iron Talcum magnetic nano adsorption material absorption ammonia nitrogen, along with absorption constantly tends to saturated, viscous solution starts aging,
Occurring coming off layer by layer, finally under the souring of refinery(waste) water current, aging nano adsorption material top layer is fallen
Entering at the bottom of tower, and separate under additional the action of a magnetic field, finally measuring ammonia-nitrogen content in wastewater effluent is
0.2mg/L, nitric efficiency reaches more than 99.99%.
Example 2
Weighing 10.4g magnesium nitrate, 6.7g aluminum nitrate the most respectively, 12.6g ferric nitrate is dissolved in 600ml and contains 7.2g
In the ethanol solution of carbamide, stir 1h under room temperature, pour into and hydrothermal reaction kettle is heated to 140 DEG C, reaction
The room temperature of cooling after 10.4h, is dried 8h at 60 DEG C after then cleaning one time with ethanol and deionized water,
To nano magnalium molten iron Talcum, then by the nano magnalium molten iron Talcum of above-mentioned preparation by mass concentration it is successively
The concentrated hydrochloric acid of 36.5% and saturated potassium hydroxide solution soak 7h, are 105 DEG C in temperature after being placed in Muffle furnace
Lower drying, then magnetizes near magnetic field, then by the nano magnalium molten iron Talcum material after pickling, alkali leaching and magnetization
Material immerses in 20g organic composite denitrifier, wherein comprises 6g bicarbonate, 9g salicylide, 5g2-crotonaldehyde,
Again modified nano magnalium molten iron talc materials deionized water is cleaned 3, at nitrogen after stirring 40min
Calcining 5h after drying under protective condition at temperature is 900 DEG C, described organic composite denitrifier is described organic
Composite denitrification agent is nicotine, salicylide, three kinds of materials of crotonic aldehyde, counts in mass ratio, 30% nicotine,
45% salicylide, 25%2-crotonaldehyde, the organic composite denitrifier modification magnesium-aluminum-iron brucite magnetic that will prepare
Property nano adsorption material and adhesive 5:1 in mass ratio be made into viscous fluid, viscous fluid spray gun is uniformly sprayed on poly-
Ptfe plastic sheet top layer, every layer of plastic sheet thickness is 10cm, then will be jetted through the plastic sheet of viscous fluid logical
After being dried 30min under wind state, vertical superposition is placed in adsorption tower, and superimposed layer height is 55cm, interlayer phase
Between space height be 65cm, the refinery(waste) water allowing ammonia nitrogen concentration be 8000mg/L flows through in adsorption tower, flow velocity control
10m processed3/ h, the time of staying is 60min, then organic composite denitrifier modification magnesium-aluminum-iron brucite magnetic is received
Rice adsorbing material absorption ammonia nitrogen, along with absorption constantly tends to saturated, viscous solution starts aging, occurs coming off layer by layer,
It is last that under the souring of refinery(waste) water current, aging nano adsorption material top layer is fallen at the bottom of tower, and outside
Add and separate under the action of a magnetic field, finally measure ammonia-nitrogen content in wastewater effluent and finally measure ammonia nitrogen in wastewater effluent
Content is 0.2mg/L, and nitric efficiency reaches more than 99.99%.
Example 3
Weighing 7.0g magnesium nitrate, 5.8g aluminum nitrate the most respectively, 8.7g ferric nitrate is dissolved in 520ml and contains 5.5g
In the ethanol solution of carbamide, stir 1h under room temperature, pour into and hydrothermal reaction kettle is heated to 140 DEG C, reaction
The room temperature of cooling after 11h, is dried 8h at 60 DEG C, obtains after then cleaning one time with ethanol and deionized water
Nano magnalium molten iron Talcum, then be 36.5% by mass concentration successively by the nano magnalium molten iron Talcum of above-mentioned preparation
Concentrated hydrochloric acid and saturated potassium hydroxide solution soak 7h, after being placed in Muffle furnace at temperature is 105 DEG C dry,
Then magnetize near magnetic field, then the nano magnalium molten iron talc materials after pickling, alkali leaching and magnetization is immersed
In 30g organic composite denitrifier, wherein comprise 7.5g nicotine, 12g salicylide, 10.5g2-crotonaldehyde stir
Again modified nano magnalium molten iron talc materials deionized water is cleaned 3 after mixing 50min, protect at nitrogen
At temperature is 809 DEG C, calcines 5.3h after drying under the conditions of protecting, the organic composite denitrifier prepared is changed
Property magnesium-aluminum-iron brucite magnetic nano adsorption material and adhesive 5:1 in mass ratio be made into viscous fluid, by viscous fluid
Uniformly be sprayed on polytetrafluoroethylplastic plastic sheet top layer with spray gun, every layer of plastic sheet thickness is 8cm, then will be jetted through sticky
After the plastic sheet of liquid is dried 20min under ventilation state, vertical superposition is placed in adsorption tower, and superimposed layer height is
35cm, the alternate space height of interlayer is 45cm, and the refinery(waste) water allowing ammonia nitrogen concentration be 7000mg/L flows through absorption
In tower, flow speed control 8m3/ h, the time of staying is 35min, then by organic composite denitrifier modification magnesium-aluminum-iron
Brucite magnetic nano adsorption material absorption ammonia nitrogen, along with absorption constantly tends to saturated, viscous solution starts aging,
Occurring coming off layer by layer, finally under the souring of refinery(waste) water current, aging nano adsorption material top layer is fallen
Enter at the bottom of tower, and separate under additional the action of a magnetic field, finally measure ammonia-nitrogen content in wastewater effluent and finally measure
In wastewater effluent, ammonia-nitrogen content is 0.2mg/L, and nitric efficiency reaches more than 99.99%.
Claims (1)
1. a Refinery Wastewater middle and high concentration ammonia nitrogen method, it is characterised in that:
(1) prepared by magnesium-aluminum-iron brucite: weigh 5.1～10.4g magnesium nitrates, 2.5～6.7g aluminum nitrate respectively, and 4.21～2.6g ferric nitrates are dissolved in the 260～600ml ethanol solutions containing 3.57～7.2g carbamide；1h is stirred under room temperature；Pour into and hydrothermal reaction kettle is heated to 140 DEG C, react 8～12h；It is cooled to room temperature；At 60 DEG C, it is dried 8h after cleaning three times with ethanol and deionized water, obtains nano magnalium molten iron Talcum；
(2) magnetization: the nano magnalium molten iron Talcum of above-mentioned preparation is soaked 7h with the concentrated hydrochloric acid that mass concentration is 36.5% and saturated potassium hydroxide solution successively, is placed in Muffle furnace, dries at temperature is 105 DEG C, magnetize near magnetic field；
(3) modified: the nano magnalium molten iron talc materials after pickling, alkali leaching and magnetization to be immersed in 10～30g organic composite denitrifiers, stirs 25～50min；Described organic composite denitrifier is nicotine, salicylide, three kinds of materials of crotonic aldehyde, counts in mass ratio, 10%～30% nicotine, 20%～45% salicylide, 25%～70%2-crotonaldehyde；
(4) dry: modified nano magnalium molten iron talc materials deionized water is cleaned 3 times, dry under nitrogen protective condition；
(5) activation: calcine 4～6h at temperature is 800 DEG C～900 DEG C,；
(6) the organic composite denitrifier modification magnesium-aluminum-iron brucite magnetic nano adsorption material prepared is made into viscous fluid with adhesive 5:1 in mass ratio, viscous fluid spray gun is uniformly sprayed on polytetrafluoroethylplastic plastic sheet top layer, and every layer of plastic sheet thickness is 4～10cm；Described adhesive is by weight ratio: 25 parts of polyvinyl alcohol, 20 parts of carboxymethyl starches, 25 parts of Graphenes and 30 parts of waterglass；
(7) after the plastic sheet being jetted through viscous fluid being dried 10～30min under ventilation state, vertically superposition is placed in adsorption tower, superimposed layer height is 25～55cm, the alternate space height of interlayer is 30～65cm, the refinery(waste) water allowing ammonia nitrogen concentration be 1500～8000mg/L flows through in adsorption tower, flow speed control 5～10m3/ h, the time of staying is 20～60min；
(8) organic composite denitrifier modification magnesium-aluminum-iron brucite magnetic nano adsorption material absorption ammonia nitrogen, along with absorption constantly tends to saturated, viscous fluid starts aging, occurs coming off layer by layer；
(9) under the souring of refinery(waste) water current, aging nano adsorption material top layer is fallen at the bottom of tower, and separates under additional the action of a magnetic field.
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| CN107585825B (en) * | 2017-10-27 | 2020-05-05 | 山东建筑大学 | Adsorption magnetic separation synchronous recovery device for recovering phosphate in sludge digestion liquid and wastewater treatment method thereof |
| CN109529758A (en) * | 2018-12-13 | 2019-03-29 | 东华理工大学 | Mg-Fe double-metal hydroxide adsorbent, preparation method and application |
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| CN101962208A (en) * | 2010-10-28 | 2011-02-02 | 上海工程技术大学 | Magnesium-aluminum-iron hydrotalcite, preparation method and application thereof as coadsorbent |
| US9499420B2 (en) * | 2012-11-06 | 2016-11-22 | Thatcher Company, Inc. | Formulations and methods for removing heavy metals from waste solutions containing chelating agents |
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