CN109243657A - A kind of combined type uranium-bearing low level waste water ecology cleaning treatment system and processing method - Google Patents
A kind of combined type uranium-bearing low level waste water ecology cleaning treatment system and processing method Download PDFInfo
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- CN109243657A CN109243657A CN201810938367.6A CN201810938367A CN109243657A CN 109243657 A CN109243657 A CN 109243657A CN 201810938367 A CN201810938367 A CN 201810938367A CN 109243657 A CN109243657 A CN 109243657A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/06—Processing
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/06—Processing
- G21F9/12—Processing by absorption; by adsorption; by ion-exchange
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
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- G21F9/18—Processing by biological processes
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Abstract
The invention discloses a kind of combined type uranium-bearing low level waste water ecology cleaning treatment system and processing methods.Respectively moss enriching plant absorbed layer, humus adsorption layer, modified zeolite purifying layer, the gravel collection water layer of its cleaning treatment system from top to bottom are constituted；There is the drip irrigation pipe network being made of the PVC drip irrigation pipe of 1cm and pipe with tube spacing 50cm in the upper surface of it；There is perforated drain pipe in gravel collection water layer.Uranium-bearing low level waste water is discharged after the 5~6h of purified treatments such as moss enriching plant absorbed layer, humus adsorption layer, modified zeolite purifying layer, gravel collection water layer by perforated drain pipe respectively from top to bottom through drip irrigation pipe network when use.The present invention be capable of effective solution Uranium of low cost, in the radioactive pollution water body such as Uranium tailings uranium to the radioactivity of water body environment and the dual pollution problem of heavy metal toxicity.
Description
Technical field
The present invention relates to the processing of uranium-bearing low level waste water, and in particular to the ecology purification system of uranium-bearing low level waste water and processing
Method.
Background technique
Uranium-bearing low level waste water mainly includes the exploitation of uranium ore, the waste water for selecting smelting and purifying conversion, the elimination of nuclear facilities, nuclear facilities
Decontamination washing, nuclear reactor waste water, spentnuclear fuel post-processing, radioactive isotope generate and application waste water, Uranium tailings beach face and infiltration
The uranium-containing waste waters such as water.The production of nuclear weapon and experiment wastewater and other certain industry, such as uranium, society, radium mineral extraction rare earth member
The waste water such as element.
According to China " radioactive waste classification standard " (GB 9133-1995), uranium-containing waste water largely belong to the Ith grade it is low
Radioactive waste liquid, concentration are less than or equal to 4 × 106Bq/L.These wastewater flow rates are big, nuclide concentration is lower, and existing main problem is place
The time that reason disposition investment is more, energy consumption is high, needs persistently to handle is long, treatment effeciency is low etc..After these low level waste waters enter environment
It causes water and soil pollution and human body may be entered through a variety of ways, cause damages to environment and the mankind.How effectively to locate
The sustainable development that these a large amount of low level waste waters are directly related to nuclear industry is managed, is one in the urgent need to address great
Problem.
Improvement to effluent from uranium mining and metallurgy, it is either domestic or external, it can substantially be divided into physics, chemistry and biology
The combination of processing method or both or three.Chemical (coagulation) precipitating, ion exchange, evaporation and concentration, absorption are processing
4 kinds of basic technologies of low-activity uranium-containing waste water.However, traditional treatment process all has biggish limitation, it is skill first
Art is costly, and followed by treating capacity is small, for requiring the place of quick, thorough processing or reparation, it is difficult to which large scale processing is put
The water body of radioactive pollution.For being similar to Decommissioning of Uranium Mines And Mills In China Tailings Dam infiltration situation, the seepage point having due to it is more, seeps
The features such as water is larger, infiltration uranium concentration is lower, the water seepage treatment time is especially long, therefore keep its processing cost excessively high.Meanwhile it passing
All there is a sediment secondary treatment in system treatment process, increase processing difficulty and economic pressures.In recent years, domestic
Some new treatment technologies are gradually begun to focus on outside, such as UF membrane, microorganism adsorption, permeable reactive barrier, Zero-valent Iron
The ecological treatment method etc. of facture and biological prosthetic i.e. radioactivity uranium-containing waste water.However, these novel processing techniques or
Method is not still in the experimental study stage, it is difficult to which the reason of handling for actual waste water is exactly that processing cost is too high.Especially value
It obtains it is noted that being used to handle the trial of Spent Radioactive water pollution just by increasing concern for eco-treatment technology.By
It will continue the even upper a century of many decades, the processing of traditional chemistry and physics in the processing of retired nuclear facilities uranium-bearing radioactive wastewater
Mode is difficult to adapt to long-term running demand, and there is an urgent need to find processing technique more economical and environmentally friendly.
Summary of the invention
The object of the present invention is to provide a kind of system and method for combined biologicalization processing low level waste water, are inexpensive
It solves the uranium-containing waste waters such as Uranium, Uranium tailings and provides technological service to the dual pollution of the radioactivity and heavy metal of water body environment.
The technical scheme is that a kind of combined type uranium-bearing low level waste water ecology cleaning treatment system, it is stratiform
Structure, respectively 5~10cm moss enriching plant absorbed layer, 5~10cm humus adsorption layer, 10~20cm from top to bottom change
Property Zeolite-purification layer, 10~20cm gravel collection water layer etc. constitute, there are the PVC drip irrigation pipe and pipe and tube spacing by 1cm in the upper surface of it
The drip irrigation pipe network that 50cm is constituted；There is perforated drain pipe in gravel collection water layer.
The moss enriching plant absorbed layer is made of the sandy soil that partial size is 3~5mm, with a thickness of 5~10cm.Moss is rich
The uranium enrichment bryophyte planted on collection plant absorbed layer is big hypnum moss(Hypnum plumaeforme), the small plumage moss of spire
(Haplocladium angusitifolium), Plagiomnium aculum(Hyophila javanica), grow thickly true moss(Bryum Caespicium), high-quality green tea blueness moss(Brachythecium piligerum)One or both of or more combination.
The humus adsorption layer is made of the peat that content of humic acid is 30% or more, with a thickness of 5~10cm.
The modified zeolite purifying layer is made of the modified zeolite that partial size is 3 ~ 5mm, 10~20cm of thickness.
Modified zeolite preparation in the modified zeolite purifying layer is to be sieved float stone through broken, screening, grinding
Partial size is 3mm pumice granules, and the ratio that 2000m1 concentration is 1.0mol/L nitric acid solution is added with 1000g pumice granules and is soaked
Pickling is steeped, soaking time 4h is washed with clear water to filtrate pH=6.5 after filtering, and filter residue dries 3h at 95 DEG C, in 600 DEG C of temperature
Degree is lower to roast 6h, and modified float stone is made after natural cooling.
The gravel collection water layer is made of the gravel that partial size is 5 ~ 10mm, the ratio of thickness and enriching plant absorber thickness
For 10~20cm.
A kind of method of combined type uranium-bearing low level waste water ecology cleaning treatment system processing uranium-bearing low level waste water, uranium-bearing are low
It puts waste water and enters combined biological cleaning treatment system through drip irrigation pipe network, the moss enriching plant that passes through respectively from top to bottom is inhaled
The residence time for receiving the purified treatments such as layer, humus adsorption layer, modified zeolite purifying layer, gravel collection water layer is 5~6h, after purification
Water outlet through gravel collection water layer middle punch drainpipe be discharged.
The present invention is put by drip irrigation pipe network by low using a kind of combined type uranium-bearing low level waste water ecology cleaning treatment system
Waste water inputs moss enriching plant absorbed layer, and the moss uranium enriching plant in moss enriching plant absorbed layer is in low level waste water
Uranium carries out plant extraction purification, while moss enriching plant rhizoid carries out absorption fixation to the uranium in low level waste water.Humus is inhaled
Remaining uranium after bryophyte extracting and purifying is further adsorbed fixation by attached layer.Modified zeolite purifying layer again adsorbs humus layer
The further adsorption cleaning processing of remaining uranium after fixing process, by multilayer advanced purification system, treated that low level waste water is up to standard
Discharge, 90% or more purified treatment rate > can realize the ecology purified treatment of low cost to uranium-bearing low level waste water.
Specific embodiment
The present invention is described in further details combined with specific embodiments below.
Embodiment 1:
A kind of combined type uranium-bearing low level waste water ecology cleaning treatment system from top to bottom be respectively that moss enriching plant absorbs
Layer, humus adsorption layer, modified zeolite purifying layer, gravel collection water layer etc. are constituted, and there is drip irrigation pipe network in the upper surface of it；Gravel collection water layer
In have perforated drain pipe.
Moss enriching plant absorbed layer is made of the sandy soil that partial size is 3mm, with a thickness of 5cm.Moss enriching plant absorbed layer
The moss uranium enriching plant of upper plantation is big hypnum moss(Hypnum plumaeforme).Humus adsorption layer is by content of humic acid
30% or more peat composition, with a thickness of 5cm.Modified zeolite purifying layer is made of the modified zeolite that partial size is 3mm, with a thickness of
20cm。
Modified zeolite preparation in modified zeolite purifying layer is to obtain Sieving and casing and be float stone through broken, screening, grinding
3mm pumice granules are added the ratio that 2000m1 concentration is 1.0mol/L nitric acid solution with 1000g pumice granules and carry out impregnating acid
It washes, soaking time 4h, is washed with clear water to filtrate pH=6.5 after filtering, filter residue dries 3h at 95 DEG C, at a temperature of 600 DEG C
6h is roasted, modified float stone is made after natural cooling.Gravel integrates water layer and is made of partial size as the gravel of 5mm, with a thickness of 20cm.
Uranium-bearing low level waste water enters combined type life by the drip irrigation pipe network that the PVC drip irrigation pipe of 1cm, pipe and tube spacing 50cm are constituted
State cleaning treatment system, uranium-bearing low level waste water is after the residence time in combined biological cleaning treatment system is 3h, only
Water outlet after change is discharged through gravel collection water layer middle punch drainpipe.90% or more uranium-bearing low level waste water purified treatment rate >, realization contains
The ecology purified treatment of uranium low level waste water low cost.
Embodiment 2:
A kind of combined type uranium-bearing low level waste water ecology cleaning treatment system from top to bottom be respectively that moss enriching plant absorbs
Layer, humus adsorption layer, modified zeolite purifying layer, gravel collection water layer etc. are constituted, and there is drip irrigation pipe network in the upper surface of it；Gravel collection water layer
In have perforated drain pipe.
Moss enriching plant absorbed layer is made of the sandy soil that partial size is 5mm, with a thickness of 10cm.Moss enriching plant absorbed layer
The moss uranium enriching plant of upper plantation is Plagiomnium aculum(Hyophila javanica).Humus adsorption layer is by content of humic acid
30% or more peat composition, with a thickness of 10cm.Modified zeolite purifying layer is made of the modified zeolite that partial size is 5mm, with a thickness of
10cm.Prepared by the modified zeolite in modified zeolite purifying layer is that float stone is obtained Sieving and casing through broken, screening, grinding as 5mm
Pumice granules are added the ratio that 2000m1 concentration is 1.0mol/L nitric acid solution with 1000g pumice granules and carry out soak acid-cleaning, leaching
Time 4h is steeped, is washed with clear water to filtrate pH=6.5 after filtering, filter residue dries 3h at 95 DEG C, in 600 DEG C of roasting temperatures
Modified float stone is made after natural cooling by 6h.Gravel integrates water layer and is made of partial size as the gravel of 10mm, with a thickness of 10cm.
Uranium-bearing low level waste water enters combined type life by the drip irrigation pipe network that the PVC drip irrigation pipe of 1cm, pipe and tube spacing 50cm are constituted
State cleaning treatment system, uranium-bearing low level waste water is after the residence time in combined biological cleaning treatment system is 5h, only
Water outlet after change is discharged through gravel collection water layer middle punch drainpipe.90% or more uranium-bearing low level waste water purified treatment rate >, realization contains
The ecology purified treatment of uranium low level waste water low cost.
Embodiment 3:
A kind of combined type uranium-bearing low level waste water ecology cleaning treatment system, respectively moss enriching plant from top to bottom absorb
Layer, humus adsorption layer, modified zeolite purifying layer, gravel collection water layer etc. are constituted；There is drip irrigation pipe network in the upper surface of it；Gravel collection water layer
In have perforated drain pipe.
Moss enriching plant absorbed layer is made of the sandy soil that partial size is 4mm, with a thickness of 8cm.Moss enriching plant absorbed layer
The moss uranium enriching plant of upper plantation is the true moss that grows thickly(Bryum caespicium).Humus adsorption layer is by content of humic acid
30% or more peat composition, with a thickness of 7cm.Modified zeolite purifying layer is made of the modified zeolite that partial size is 4mm, with a thickness of
15cm。
Modified zeolite preparation in modified zeolite purifying layer is to obtain Sieving and casing and be float stone through broken, screening, grinding
4.5mm pumice granules are added the ratio that 2000m1 concentration is 1.0mol/L nitric acid solution with 1000g pumice granules and carry out impregnating acid
It washes, soaking time 4h, is washed with clear water to filtrate pH=6.5 after filtering, filter residue dries 3h at 95 DEG C, at a temperature of 600 DEG C
6h is roasted, modified float stone is made after natural cooling.Gravel integrates water layer and is made of partial size as the gravel of 7.5mm, with a thickness of 18cm.
Uranium-bearing low level waste water enters combined type life by the drip irrigation pipe network that the PVC drip irrigation pipe of 1cm, pipe and tube spacing 50cm are constituted
State cleaning treatment system, uranium-bearing low level waste water the residence time in combined biological cleaning treatment system be 3.5h after,
Purified water outlet is discharged through gravel collection water layer middle punch drainpipe.90% or more uranium-bearing low level waste water purified treatment rate > is realized
The ecology purified treatment of uranium-bearing low level waste water low cost.
Embodiment 4:
A kind of combined type uranium-bearing low level waste water ecology cleaning treatment system from top to bottom be respectively that moss enriching plant absorbs
Layer, humus adsorption layer, modified zeolite purifying layer, gravel collection water layer etc. are constituted；There is drip irrigation pipe network in the upper surface of it；Gravel collection water layer
In have perforated drain pipe.
Moss enriching plant absorbed layer is made of the sandy soil that partial size is 3mm, with a thickness of 10cm.Moss enriching plant absorbed layer
On in any proportion mixed planting moss uranium enriching plant be big hypnum moss(Hypnum plumaeforme)With the small plumage moss of spire
(Haplocladium angusitifolium) etc..Humus adsorption layer is made of the peat that content of humic acid is 30% or more,
With a thickness of 6cm.Modified zeolite purifying layer is made of the modified zeolite that partial size is 3mm, with a thickness of 16cm.In modified zeolite purifying layer
Modified zeolite preparation be that float stone is obtained Sieving and casing through broken, screening, grinding is 3mm pumice granules, with 1000g float stone
Grain is added the ratio that 2000m1 concentration is 1.0mol/L nitric acid solution and carries out soak acid-cleaning, and soaking time 4h uses clear water after filtering
To filtrate pH=6.5, filter residue dries 3h at 95 DEG C for washing, is made modified floating after 600 DEG C of roasting temperature 6h, natural cooling
Stone.Gravel integrates water layer and is made of partial size as the gravel of 5mm, with a thickness of 20cm.
Uranium-bearing low level waste water enters combined type life by the drip irrigation pipe network that the PVC drip irrigation pipe of 1cm, pipe and tube spacing 50cm are constituted
State cleaning treatment system, uranium-bearing low level waste water the residence time in combined biological cleaning treatment system be 4.5h after,
Purified water outlet is discharged through gravel collection water layer middle punch drainpipe.90% or more uranium-bearing low level waste water purified treatment rate > is realized
The ecology purified treatment of uranium-bearing low level waste water low cost.
Embodiment 5:
A kind of combined type uranium-bearing low level waste water ecology cleaning treatment system from top to bottom be respectively that moss enriching plant absorbs
Layer, humus adsorption layer, modified zeolite purifying layer, gravel collection water layer etc. are constituted；There is drip irrigation pipe network in the upper surface of it；Gravel collection water layer
In have perforated drain pipe.
Moss enriching plant absorbed layer is made of the sandy soil that partial size is 5mm, with a thickness of 10cm.Moss enriching plant absorbed layer
On in any proportion mixed planting moss uranium enriching plant be big hypnum moss(Hypnum plumaeforme), grow thickly true moss(Bryum caespicium)With high-quality green tea blueness moss(Brachythecium piligerum)Deng.Humus adsorption layer is by humic acid
The peat that content is 30% or more forms, with a thickness of 6cm.Modified zeolite purifying layer is made of the modified zeolite that partial size is 4mm, thick
Degree is 15cm.
Modified zeolite preparation in modified zeolite purifying layer is to obtain Sieving and casing and be float stone through broken, screening, grinding
4mm pumice granules are added the ratio that 2000m1 concentration is 1.0mol/L nitric acid solution with 1000g pumice granules and carry out impregnating acid
It washes, soaking time 4h, is washed with clear water to filtrate pH=6.5 after filtering, filter residue dries 3h at 95 DEG C, at a temperature of 600 DEG C
6h is roasted, modified float stone is made after natural cooling.Gravel integrates water layer and is made of partial size as the gravel of 8mm, with a thickness of 20cm.
Uranium-bearing low level waste water enters combined type life by the drip irrigation pipe network that the PVC drip irrigation pipe of 1cm, pipe and tube spacing 50cm are constituted
State cleaning treatment system, uranium-bearing low level waste water is after the residence time in combined biological cleaning treatment system is 5h, only
Water outlet after change is discharged through gravel collection water layer middle punch drainpipe.90% or more uranium-bearing low level waste water purified treatment rate >, realization contains
The ecology purified treatment of uranium low level waste water low cost.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and example shown and described herein.
Claims (8)
1. a kind of combined type uranium-bearing low level waste water ecology cleaning treatment system, which is characterized in that it is layer structure, is arrived from above
Under be respectively 5~10cm moss enriching plant absorbed layer, 5~10cm humus adsorption layer, 10~20cm modified zeolite purification
Layer, 10~20cm gravel collection water layer etc. are constituted, and the upper surface of it has by the PVC drip irrigation pipe of 1cm and pipe is constituted with tube spacing 50cm
Drip irrigation pipe network；There is perforated drain pipe in gravel collection water layer.
2. combined type uranium-bearing low level waste water ecology cleaning treatment system according to claim 1, which is characterized in that described
Moss enriching plant absorbed layer by partial size be 3~5mm sandy soil form, with a thickness of 5~10cm.
3. combined type uranium-bearing low level waste water ecology cleaning treatment system according to claim 1, which is characterized in that described
Moss enriching plant absorbed layer on the uranium enrichment bryophyte planted be big hypnum moss, the small plumage moss of spire, Plagiomnium aculum, grow thickly it is true
The combination of one or both of moss, high-quality green tea blueness moss or more.
4. combined type uranium-bearing low level waste water ecology cleaning treatment system according to claim 1, which is characterized in that described
The humus adsorption layer by content of humic acid be 30% or more peat form, with a thickness of 5~10cm.
5. combined type uranium-bearing low level waste water ecology cleaning treatment system according to claim 1, which is characterized in that described
The modified zeolite purifying layer by partial size be 3 ~ 5mm modified zeolite form, 10~20cm of thickness.
6. combined type uranium-bearing low level waste water ecology cleaning treatment system according to claim 5, which is characterized in that described
The described modified zeolite preparation be that float stone is obtained Sieving and casing through broken, screening, grinding is 3mm pumice granules, with 1000g
Pumice granules are added the ratio that 2000m1 concentration is 1.0mol/L nitric acid solution and carry out soak acid-cleaning, soaking time 4h, after filtering
It is washed with clear water to filtrate pH=6.5, filter residue dries 3h at 95 DEG C, is made after 600 DEG C of roasting temperature 6h, natural cooling
's.
7. combined type uranium-bearing low level waste water ecology cleaning treatment system according to claim 1, which is characterized in that described
The gravel collection water layer by partial size be 5 ~ 10mm gravel form, 10~20cm of thickness.
8. a kind of method of combined type uranium-bearing low level waste water ecology cleaning treatment system processing uranium-bearing low level waste water, feature exist
In, uranium-bearing low level waste water enters combined biological cleaning treatment system through drip irrigation pipe network, from top to bottom respectively pass through moss
The residence time of the purified treatments such as enriching plant absorbed layer, humus adsorption layer, modified zeolite purifying layer, gravel collection water layer is 5
~6h, purified water outlet are discharged through gravel collection water layer middle punch drainpipe.
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