CN104445500B - Adsorption treatment process method for low-concentration ammonia nitrogen wastewater - Google Patents
Adsorption treatment process method for low-concentration ammonia nitrogen wastewater Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 66
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 47
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 230000008569 process Effects 0.000 title claims abstract description 35
- 239000002351 wastewater Substances 0.000 title claims abstract description 30
- 239000003463 adsorbent Substances 0.000 claims abstract description 93
- 230000003213 activating effect Effects 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims abstract description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 26
- 230000004913 activation Effects 0.000 claims description 24
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 20
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 14
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 238000013329 compounding Methods 0.000 claims description 11
- 229910021529 ammonia Inorganic materials 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 9
- 238000012856 packing Methods 0.000 claims description 8
- 238000009418 renovation Methods 0.000 claims description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 229910021536 Zeolite Inorganic materials 0.000 claims description 7
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 7
- 239000011780 sodium chloride Substances 0.000 claims description 7
- 239000010457 zeolite Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229920000297 Rayon Polymers 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 238000010926 purge Methods 0.000 claims description 4
- 230000008439 repair process Effects 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000010426 asphalt Substances 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 230000007420 reactivation Effects 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 230000004907 flux Effects 0.000 claims description 2
- -1 polypropylene Polymers 0.000 claims description 2
- 230000037452 priming Effects 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 2
- 235000017550 sodium carbonate Nutrition 0.000 claims description 2
- 235000002639 sodium chloride Nutrition 0.000 claims description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 2
- 235000011152 sodium sulphate Nutrition 0.000 claims description 2
- 239000001117 sulphuric acid Substances 0.000 claims description 2
- 235000011149 sulphuric acid Nutrition 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims 1
- 239000002253 acid Substances 0.000 claims 1
- 239000000835 fiber Substances 0.000 claims 1
- 229920001155 polypropylene Polymers 0.000 claims 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims 1
- 230000008929 regeneration Effects 0.000 abstract description 19
- 238000011069 regeneration method Methods 0.000 abstract description 19
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 229920006395 saturated elastomer Polymers 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 10
- 238000005406 washing Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 239000000706 filtrate Substances 0.000 description 6
- 238000005304 joining Methods 0.000 description 6
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000011068 loading method Methods 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 238000007654 immersion Methods 0.000 description 3
- 229920002239 polyacrylonitrile Polymers 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012851 eutrophication Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical group N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000002384 drinking water standard Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000007954 hypoxia Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3416—Regenerating or reactivating of sorbents or filter aids comprising free carbon, e.g. activated carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3475—Regenerating or reactivating using a particular desorbing compound or mixture in the liquid phase
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Water Treatment By Sorption (AREA)
Abstract
A low-concentration ammonia nitrogen wastewater adsorption treatment process belongs to the technical field of wastewater treatment. The process method provided by the invention comprises the steps of activating treatment of the adsorbent, application process of the adsorbent and regeneration of the adsorbent. The adsorbent selected by the invention is activated under certain conditions, the adsorption capacity of the adsorbent on ammonia nitrogen in wastewater is obviously improved, the concentration of the wastewater treated by the process can be controlled at an extremely low level, and the treatment effect of the adsorbent after regeneration is not obviously reduced. The method has the advantages of good treatment effect, low regeneration cost of the adsorbent, simple method, good reusability, wide application range and the like.
Description
Technical field
The present invention relates to a kind of Low Concentration Ammonia Containing Wastewater adsorption treatment new technology, at specifically a kind of employing adsorbent
The process matched therewith method of reason Low Concentration Ammonia Containing Wastewater, belongs to technical field of waste water processing.
Background technology
In recent years, along with developing rapidly of China's economic, pollution of waterhead is day by day serious, and drinking water source water quality is gradually
Decline.Wherein ammonia nitrogen is a kind of important substance causing body eutrophication and environmental pollution, ammonia nitrogen concentration in water
Too high, nature nitrification can be suppressed, cause water hypoxia, cause Fish to be poisoned, reduce water body self-purification ability, sternly
Heavily endanger human health.Therefore, China and in the world many countries in drinking water standard, ammonia-nitrogen content is had
Strict restriction.
Ammonia nitrogen enters water body, particularly flow lake, bay more slowly, easily cause in water algae and other
Microorganism amount reproduction, forms eutrophication pollution, except water treatment plants can be made to run difficulty, cause drink
With outside the abnormal flavour of water, oxygen in water can be made time serious to decline, Fish mortality, water quality degenerates, and is formed red
Tide, results even in the dry destruction in lake.Ammonia nitrogen also makes water disinfection and industrial circulating water sterilisation process
In increase chlorine dosage；To some metal, particularly copper had corrosivity；When reusing sewage, recycled water
Middle ammonia nitrogen can promote the breeding of microorganism in aqueduct and watering equipment, forms biofouling, blocking pipeline and
Watering equipment, and affect heat exchange efficiency.
Generally industry middle and high concentration ammonia nitrogen waste water can make sewage qualified discharge by the steam stripped mode of stripping, this
Kind of mode efficiency is high, effective, and can with ammonia, ammonium sulfate form recycle-water in ammonia nitrogen, be a kind of
Common ammonia nitrogen waste water treatment method.But when its process low concentration ammonia nitrogen waste water, especially 200ppm with
Time lower, the problems such as energy consumption is relatively large, uneconomical will be produced.For Low Concentration Ammonia Containing Wastewater, in industry often
Adsorb with natural or synthesis adsorbent, also can reach preferable treatment effect.
Absorption method has the features such as simple to operate, installation cost is low and aqueous concentration is stable, in commercial Application relatively
For generally.Absorption method by adsorbent to the specific absorbability of ammonia nitrogen in water, when ammonium radical ion and adsorbent table
When face contacts, will adsorb on its surface, thus reach to remove the purpose of ammonia nitrogen in waste water.But it is general
Ammonia nitrogen adsorbent, adsorption capacity is less, needs frequent regeneration, and after regenerating, absorbability declines, and leads
Causing operating cost higher, this limits its industrial applications the most to a certain extent.
Summary of the invention
The technical problem to be solved uses absorption method modal when being and process ammonia nitrogen waste water in industry
Shortcoming, wherein comprises the bad outlet ammonia nitrogen concentration caused of adsorption effect higher, adsorbent reactivation weak effect, inhales
Attached dose of regeneration cost is more high.
The invention provides a kind of Low Concentration Ammonia Containing Wastewater adsorption treatment process method, this technique includes: adsorbent
Three aspects of renovation process of activation method, the application of adsorbent and adsorbent.
(1) adsorbent and activation method thereof
Adsorbent is carried out mixed and modified with activating solution, scrubbed, be dried to obtain the adsorbent after activation.
The process conditions that above-mentioned activation method is used are:
Adsorbent can use activated carbon fiber and zeolite, activated carbon fiber and activated alumina or activated carbon fiber
Carry out compounding obtaining with activated carbon and compound adsorbent；Wherein activated carbon fiber can be that polyacrylonitrile based activated carbon is fine
One in dimension, viscose base activated carbon fiber and asphalt activity carbon fiber；Zeolite model can be 4A, 5A
Or the one of 13X type；
In compounding adsorbent, the volume ratio that activated carbon fiber occupies is 65%～95%；
Described activating solution is the one therein such as sulphuric acid, nitric acid, hydrochloric acid, sodium hydroxide, sodium chloride and sodium carbonate
Or it is several；
The mass concentration scope of activating solution is 5%～60%；
Activation temperature is 30～90 DEG C；
The priming reaction time is 1～12h；
Activation number of times is twice or more than twice.
(2) adsorption applications of adsorbent
Under the conditions of uniform temperature, the above-mentioned compounding adsorbent through overactivation is packed in fixed-bed adsorber,
Low Concentration Ammonia Containing Wastewater is carried out adsorption treatment.
The process conditions that above-mentioned adsorption process is used are:
Entering water ammonia nitrogen concentration is 15～500ppm, and the pH scope entering water is 2～10；
Ammonia nitrogen waste water temperature range is 0～50 DEG C；
The operation time of staying of ammonia nitrogen waste water is 0.5～4h；
Adsorbent packing density is 0.1～2.5kg/dm3。
(3) renovation process of adsorbent
After described compounding adsorbent uses the process described in above-mentioned steps to process ammonia nitrogen waste water a period of time,
Its water outlet ammonia nitrogen concentration gos up to (being generally not more than 15ppm) during finite concentration, stops and carries out adsorbent again
Raw process.First a small amount of regenerated liquid is sprayed, then with after water vapor purging a period of time, when outlet being detected
Time in water vapour condensed water without ammonia nitrogen, regenerative process terminates, and lays equal stress on and relapses additive process.
The technological parameter that above-mentioned regenerative process is used is:
Regenerated liquid can use the one in sodium chloride, sodium sulfate, sodium carbonate, sodium hydroxide or sodium bicarbonate or several
Kind；
Regenerated liquid mass concentration scope is 0.1～10%；
Regenerated liquid spray flux needed for every kilogram of adsorbent is 5～20L；
The water vapor purging recovery time is 1～6 hour；
Water vapor pressure scope can use 0.1～1Mpa.
Beneficial effects of the present invention:
1, ammonia nitrogen waste water water outlet concentration after treatment is extremely low and controlled；
2, adsorbent is recycled for multiple times, and uses effect stability after regeneration；
3, the renovation process of adsorbent is simple, and regeneration cost is relatively low.
Detailed description of the invention
The present invention is further illustrated below by way of specific embodiment.But the detail of embodiment is only used for explaining this
Invention, should not be construed as limited overall technical solution.
Embodiment 1:
The activation method of adsorbent: weigh certain mass viscose base activated carbon fiber sample and enter with 4A zeolite sample
Row is compounding so that in the volumetric spaces shared by adsorbent, the volume ratio that activated carbon fiber occupies is about 70%.
First take 1.0t and compound adsorbent at 2m3Mass fraction be 5% NaOH solution in 80 DEG C soak after 1h,
Washes clean, then through 2.3m3Mass concentration is sodium chloride solution soaking at room temperature 12h of 9%, washing and drying.
The application of activating adsorbent: load the compounding suction after activation in the ADSORPTION IN A FIXED BED tower of a diameter of 1.2m
Attached dose, adsorbent packing density is 1.80kg/dm3, concentration is that the nitrogen-containing wastewater of 40mg/L is with 0.8m3/ h's
Flow passes through adsorption tower, measures its water outlet ammonia nitrogen concentration.Result shows: be 35 DEG C in temperature, and pH is 6,
Flow is 0.8m3Under/h, use GB 7479-87 Na Shi spectrophotography, detect water outlet ammonia nitrogen concentration,
Detection display reaches national standard reference GB 8978-1996, i.e. aqueous concentration less than 15mg/L, denitrogenation filtrate
Treatment effeciency is 340L/kg, and saturated treating capacity is 740L/kg.
The renovation process of adsorbent: the ADSORPTION IN A FIXED BED tower to the most saturated absorption, spray mass concentration is 5%
NaOH solution 4.2m3(adsorbent mass is about 0.83t), after draining away the water, it is passed through 0.1Mpa vapours again
Raw 4h, penetrates adsorption efficiency and is about 330L/kg after regeneration, without substantially reducing.
Embodiment 2:
The activation method of adsorbent: the viscose base activated carbon fiber and the activated alumina ball that weigh certain mass are carried out
Compounding so that in the volumetric spaces shared by adsorbent, the volume ratio that activated carbon fiber occupies is about 85%.
First take 0.6t and compound adsorbent at 1.4m3Mass fraction is the Na of 6%2CO3In solution after 60 DEG C of immersion 2h,
Washes clean, then through 2.2m3Mass concentration is sodium chloride solution soaking at room temperature 6h of 5%, washing and drying.
The adsorption applications of activating adsorbent: load the absorption after activation in the ADSORPTION IN A FIXED BED tower of a diameter of 0.9m
Agent, adsorbent packing density is 0.73kg/dm3, concentration is that the nitrogen-containing wastewater of 100mg/L is with 0.8m3/ h's
Flow passes through adsorption tower, measures its water outlet ammonia nitrogen concentration.Result shows: be 40 DEG C in temperature, and pH is neutral,
Flow velocity is 1.2m3Under/h, use GB 7479-87 Na Shi spectrophotography, detect water outlet ammonia nitrogen concentration,
Detection display reaches national standard reference GB 8978-1996, i.e. aqueous concentration less than 15mg/L, denitrogenation filtrate
Treatment effeciency is 240L/kg, and saturated treating capacity is 540L/kg.
The regeneration of adsorbent: the ADSORPTION IN A FIXED BED tower to the most saturated absorption, spray mass concentration is 4%
NaOH solution 3.4m3(adsorbent mass is about 0.54t), after draining away the water, it is passed through the regeneration of 0.9Mpa vapours
2h, penetrates adsorption efficiency and is about 250L/kg, have slightly elevated after regeneration.
Embodiment 3:
The activation method of adsorbent: weigh asphalt activity carbon fiber sample and the cocoanut active charcoal sample of certain mass
Product compound so that in the volumetric spaces shared by adsorbent, the volume ratio that activated carbon fiber occupies is about 67%.
First take 0.8t and compound adsorbent at 5.3m3Mass fraction be 10% salpeter solution in 60 DEG C soak after 4h,
Washes clean, then through 6.0m3Mass concentration is the sodium hydroxide solution 60 DEG C immersion 2h of 15%, and washing is dried
Dry.
The adsorption applications of activating adsorbent: answering after loading activation in the ADSORPTION IN A FIXED BED tower of a diameter of 2.3m
Joining adsorbent, adsorbent packing density is 1.04kg/dm3, concentration be 73mg/L nitrogen-containing wastewater with
0.9m3The flow of/h passes through adsorption tower, measures its water outlet ammonia nitrogen concentration.Result shows: be 35 DEG C in temperature,
PH is 9, and flow is 0.9m3Under/h, use GB 7479-87 Na Shi spectrophotography, detect water outlet
Ammonia nitrogen concentration, detection display reaches national standard reference GB 8978-1996, i.e. aqueous concentration and is less than 15mg/L,
Denitrogenation filtrate treatment effeciency is 430L/kg, and saturated treating capacity is 960L/kg.
The regeneration of adsorbent: the adsorption column to the most saturated absorption, sprays the NaOH that mass concentration is 10% molten
Liquid 4.8m3(adsorbent mass is about 0.76t), drain away the water, be passed through 0.4Mpa vapours from adsorption column top
Regeneration 1h, penetrates adsorption efficiency and is about 435L/kg, without significant change after regeneration.
Embodiment 4:
The activation method of adsorbent: the viscose base activated carbon fiber weighing certain mass compounds with 13X type zeolite,
Making in the volumetric spaces shared by adsorbent, the volume ratio that activated carbon fiber occupies is about 81%.First take
2.6t compounds adsorbent at 10m3Mass fraction be 20% salpeter solution in 80 DEG C soak 4h, washes clean,
Then through 8m3Mass fraction is sodium hydroxide solution soaking at room temperature 2h, washing and drying.
The adsorption applications of activating adsorbent: answering after loading activation in the ADSORPTION IN A FIXED BED tower of a diameter of 0.8m
Joining adsorbent, adsorbent packing density is 1.85kg/dm3, concentration be 140mg/L nitrogen-containing wastewater with
0.8m3The flow of/h passes through adsorption tower, measures its water outlet ammonia nitrogen concentration.Result shows: be 20 DEG C in temperature,
PH is about 6, and flow is 0.8m3Under/h, use GB 7479-87 Na Shi spectrophotography, detect
Water ammonia nitrogen concentration, detection display reaches national standard reference GB 8978-1996, i.e. aqueous concentration is less than
15mg/L, denitrogenation filtrate treatment effeciency is 580L/kg, and saturated treating capacity is 1360L/kg.
The renovation process of adsorbent: the ADSORPTION IN A FIXED BED tower to the most saturated absorption, spray mass concentration is 10%
NaOH solution 10m3(adsorbent mass is about 2.34t), after draining away the water, it is passed through 1.2Mpa vapours again
Raw 3h, penetrating adsorption efficiency after regeneration is 560L/kg, without significant change.
Embodiment 5:
The activation method of adsorbent: the polyacrylonitrile based activated carbon fiber weighing certain mass is multiple with wood activated charcoal
Joining so that in the volumetric spaces shared by adsorbent, the volume ratio that activated carbon fiber occupies is about 87%.First
First take 1.6t and compound adsorbent at 8.0m3Mass fraction be 10% salpeter solution in 60 DEG C soak after 4h, wash
Wash clean, then through 6.0m3Mass fraction is the sodium hydroxide solution 60 DEG C immersion 2h of 10%, washing and drying,
Use 5.0m again3, 5% sodium chloride solution soak at room temperature 6h, washing and drying.
The adsorption applications of activating adsorbent: answering after loading activation in the ADSORPTION IN A FIXED BED tower of a diameter of 1.8m
Joining adsorbent, adsorbent packing density is 1.38kg/dm3, concentration be 40mg/L nitrogen-containing wastewater with
1.2m3The flow of/h passes through adsorption tower, measures its water outlet ammonia nitrogen concentration.Result shows: be 28 DEG C in temperature,
PH is 8, and flow is 1.2m3Under/h, use GB 7479-87 Na Shi spectrophotography, detect water outlet
Ammonia nitrogen concentration, detection display reaches national standard reference GB 8978-1996, i.e. aqueous concentration and is less than 15mg/L,
Denitrogenation filtrate treatment effeciency is 650L/kg, and saturated treating capacity is 1130L/kg.
The regeneration of adsorbent: the adsorption tower to the most saturated absorption, sprays the NaOH that mass concentration is 10% molten
Liquid 7.5m3(adsorbent mass is about 1.48t), drain away the water, be passed through 0.2Mpa vapours from adsorption column top
Regeneration 4h, penetrating adsorption efficiency after regeneration is 638L/kg, without significant change.
Embodiment 6:
The activation method of adsorbent: the polyacrylonitrile based activated carbon fiber weighing certain mass is multiple with 5A type zeolite
Joining, in the volumetric spaces shared by adsorbent, the volume ratio that activated carbon fiber occupies is about 72%.First take
1.5t compounds adsorbent at 4.2m3Mass fraction be 40% sulfuric acid solution in 60 DEG C soak 12h, washes clean,
Then through 6.0m3Mass fraction is sodium hydroxide solution soaking at room temperature 6h of 5%, washing and drying.
The adsorption applications of activating adsorbent: answering after loading activation in the ADSORPTION IN A FIXED BED post of a diameter of 2.4m
Joining adsorbent, adsorbent packing density is 0.98kg/dm3, concentration be 40mg/L nitrogen-containing wastewater with
2.0m3The flow of/h passes through adsorption column, measures its water outlet ammonia nitrogen concentration.Result shows: be 30 DEG C in temperature,
PH is about 6.5, and flow is 4m3Under/h, use GB 7479-87 Na Shi spectrophotography, detect
Water ammonia nitrogen concentration, detection display reaches national standard reference GB 8978-1996, i.e. aqueous concentration is less than
15mg/L, denitrogenation filtrate treatment effeciency is 780L/kg, and saturated treating capacity is 1820L/kg.
The renovation process of adsorbent: the ADSORPTION IN A FIXED BED post to the most saturated absorption, spray mass concentration is 10%
NaOH solution 10m3(adsorbent mass is about 1.42t), after draining away the water, it is passed through 1.0Mpa vapours again
Raw 3h, penetrates adsorption efficiency and is about 760L/kg, without significant change after regeneration.
Claims (7)
1. a Low Concentration Ammonia Containing Wastewater adsorption treatment process method, it is characterised in that this technique includes: inhale
Three aspects of the renovation process of the activation method of attached dose, the adsorption applications of adsorbent and adsorbent；
(1) adsorbent and activation method thereof
Adsorbent is carried out mixed and modified with activating solution, scrubbed, be dried to obtain the adsorbent after activation；
The process conditions that above-mentioned activation method is used are:
Adsorbent use activated carbon fiber and zeolite, activated carbon fiber and activated alumina or activated carbon fiber with
Activated carbon carries out compounding obtaining and compounds adsorbent；
(2) adsorption applications of adsorbent
Under the conditions of uniform temperature, the above-mentioned compounding adsorbent through overactivation is packed in fixed-bed adsorber,
Low Concentration Ammonia Containing Wastewater is carried out adsorption treatment；
(3) renovation process of adsorbent
After described compounding adsorbent uses the process described in above-mentioned steps to process ammonia nitrogen waste water a period of time,
When its water outlet ammonia nitrogen concentration gos up to finite concentration, stop and carry out adsorbent reactivation process；First with a small amount of again
Raw liquid spray, then with after water vapor purging a period of time, when detecting in water outlet steam condensate (SC) without ammonia
During nitrogen, regenerative process terminates, and lays equal stress on and relapses additive process.
2. according to the method for claim 1, it is characterised in that in step (1), activated carbon fiber is polypropylene
One in itrile group activated carbon fiber, viscose base activated carbon fiber and asphalt activity carbon fiber；Zeolite model is
The one of 4A, 5A or 13X type.
3. according to the method for claim 1, it is characterised in that step (1) described activating solution is sulphuric acid, nitre
Acid, hydrochloric acid, sodium hydroxide, sodium chloride and sodium carbonate therein one or more；
The mass concentration scope of activating solution is 5%～60%；
Activation temperature is 30～90 DEG C；
The priming reaction time is 1～12h；
Activation number of times is twice or more than twice.
4. according to the method for claim 1, it is characterised in that in the compounding adsorbent of step (1), activated carbon
The volume ratio that fiber occupies is 65%～95%.
5. according to the method for claim 1, it is characterised in that the process conditions that adsorption process is used are:
Entering water ammonia nitrogen concentration is 15～500ppm, and the pH scope entering water is 2～10；
Ammonia nitrogen waste water temperature range is 0～50 DEG C；
The operation time of staying of ammonia nitrogen waste water is 0.5～4h；
Adsorbent packing density is 0.1～2.5kg/dm3。
6. according to the method for claim 1, it is characterised in that the technological parameter that regenerative process is used is:
Regenerated liquid uses one or more in sodium chloride, sodium sulfate, sodium carbonate, sodium hydroxide or sodium bicarbonate；
Regenerated liquid mass concentration scope is 0.1～10%；
Regenerated liquid spray flux needed for every kilogram of adsorbent is 5～20L；
The water vapor purging recovery time is 1～6 hour；
Water vapor pressure scope uses 0.1～1Mpa.
7. according to the method for claim 1, it is characterised in that its water outlet ammonia nitrogen concentration gos up to not higher than 15
Ppm, stops and carries out adsorbent reactivation process.
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