CN109354229A - Device and method for recycling low-concentration ammonia nitrogen wastewater - Google Patents
Device and method for recycling low-concentration ammonia nitrogen wastewater Download PDFInfo
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- CN109354229A CN109354229A CN201811342444.8A CN201811342444A CN109354229A CN 109354229 A CN109354229 A CN 109354229A CN 201811342444 A CN201811342444 A CN 201811342444A CN 109354229 A CN109354229 A CN 109354229A
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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
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Abstract
The invention discloses a device for recycling low-concentration ammonia nitrogen wastewater, which comprises: the system comprises a pre-filtration low-concentration ammonia nitrogen wastewater storage tank, a surface filter, a post-filtration low-concentration ammonia nitrogen wastewater storage tank and an ultrafiltration and nanofiltration system; the pre-filtration low-concentration ammonia nitrogen wastewater storage tank, the surface filter, the post-filtration low-concentration ammonia nitrogen wastewater storage tank and the ultrafiltration and nanofiltration system are sequentially connected through pipelines. The invention also discloses a method for recycling the low-concentration ammonia nitrogen wastewater. The method shortens the treatment process of the low-concentration ammonia nitrogen wastewater, does not influence the product quality, and realizes the mixed recycling of the low-concentration ammonia nitrogen wastewater generated by different types of rare earth carbonate products.
Description
Technical field
The present invention relates to a kind of wastewater processing technologies, specifically, are related to a kind of recycling of Low Concentration Ammonia Containing Wastewater
Device and method.
Background technique
Rare earth element contained by northern Rare Earth Mine is mainly based on La, Ce, Pr, Nd, single or mixing that production process generates
Rare earth is transferred to next procedure in the form of carbonate mostly.In carbonated rare earth production process, the leaching of washing carbonated rare earth generation
It washes containing low-concentration ammonia-nitrogen, a small amount of rare earth carbonate particulate matter and micro rare earth ion in waste water, if direct emission must be made
At ecological disruption.
Currently, the main methods to this Low Concentration Ammonia Containing Wastewater have:
1, concentrated crystallization
Low Concentration Ammonia Containing Wastewater recycles the methods of electrodialysis, reverse osmosis to make after filter is filtered off except solid particulate matter
Ammonium salt in waste water obtains being enriched to concentration being 10%~20%, is evaporated later into vapo(u)rization system, obtained condensed water
It is back to use production line.This method long flow path, cost for wastewater treatment is high, but the water quality generated is good, is back to various products production line
Rare-earth products purity will not be polluted.
The method process flow is long, operating difficulties, while when utilization film enrichment, influence factor is a lot of and cost is too high.
2, mechanical filter method
The method directly hangs the solid in ammonia nitrogen waste water not to handle nitrogen-containing wastewater for the purpose of obtaining pure water
Floating particles filter out, and the ammonia nitrogen waste water containing all kinds of survivor ions is finally utilized to configure precipitating reagent.Specific process is, first low concentration ammonia
Nitrogen waste water is filtered through filter press, removes rare earth carbonate particulate matter, and the precipitating reagent for then directly applying to corresponding product is prepared.
Still contain certain density rare earth ion in which treated waste water, to avoid different rare earth ions to high-purity
The pollution of rare-earth products can only be back to use in corresponding production line.Elution caused by the rare earth carbonate of different cultivars
Wastewater flow rate is unbalanced, and when being back to respective precipitating reagent preparation process, what will be had has more than needed and some deficiencies.Due to precipitating
Agent cannot unify to prepare, and cause waste water to be unable to fully recovering and cause the waste of a part of water in production line, and device therefor is more,
Land occupation is big, and utilization rate is low；Filter press used can not seal when filtered wastewater, need artificial regular dismounting filter plate, operating environment
Difference, large labor intensity.
Summary of the invention
Technical problem solved by the invention is to provide a kind of device and method of the recycling of Low Concentration Ammonia Containing Wastewater,
Not only shorten Low Concentration Ammonia Containing Wastewater process flow, but also do not influenced product quality, and realize the production of variety classes rare earth carbonate product
Raw Low Concentration Ammonia Containing Wastewater mixing reuse.
Technical solution is as follows:
A kind of device of the recycling of Low Concentration Ammonia Containing Wastewater, comprising: include: before passing sequentially through the filter that pipeline is connected
Low Concentration Ammonia Containing Wastewater storage tank, ultrafiltration and nanofiltration system after Low Concentration Ammonia Containing Wastewater storage tank, surface filter, filter；It is low dense before filter
The preceding storage tank liquidometer of filter is provided on degree ammonia nitrogen waste water storage tank, the first waste water produces pump and is connected to Low Concentration Ammonia Containing Wastewater storage before filter
On pipeline between slot, surface filter；Surface filter is provided with surface filter pressure gauge, and surface filter passes through pipeline
Slag liquid hole is connected, surface filter residual cake valve is arranged on the pipeline in surface filter connection slag liquid hole；Slag liquid hole is provided with slag
Liquid cheats liquidometer, and the outlet in slag liquid hole is provided with slag liquid and produces pump；Low Concentration Ammonia Containing Wastewater storage tank is provided with storage tank after filter after filter
Liquidometer is provided with the second waste water on the pipeline after filter between Low Concentration Ammonia Containing Wastewater storage tank and ultrafiltration and nanofiltration system and produces
Pump.
Further, ultrafiltration includes the ultrafiltration system being connected and nanofiltration system with nanofiltration system, and ultrafiltration system is provided with super
Filter membrane, nanofiltration system are provided with nanofiltration membrane.
Further, the bottom of surface filter is arranged in surface filter residual cake valve.
A kind of method that Low Concentration Ammonia Containing Wastewater recycles, comprising:
Low Concentration Ammonia Containing Wastewater is pooled to the preceding Low Concentration Ammonia Containing Wastewater storage tank of filter, the first waste water produces pump will be low dense before filter
The Low Concentration Ammonia Containing Wastewater spent in ammonia nitrogen waste water storage tank is sent into surface filter；Low concentration is arranged before filter in storage tank liquidometer before filtering
On ammonia nitrogen waste water storage tank, Low Concentration Ammonia Containing Wastewater storage tank passes through after Low Concentration Ammonia Containing Wastewater storage tank, surface filter and filter before filtering
Pipeline is connected；First waste water produces pump and is connected on the pipeline before filtered between Low Concentration Ammonia Containing Wastewater storage tank, surface filter；
It selects surface filter to carry out prefiltration to Low Concentration Ammonia Containing Wastewater, removes the solid particulate matter in waste water；Filtering
The clear liquid of Low Concentration Ammonia Containing Wastewater afterwards from the overflow of surface filter top enter filter after Low Concentration Ammonia Containing Wastewater storage tank, it is low after filter
Concentration ammonia nitrogen wastewater storage tank is provided with storage tank liquidometer after filter；The solid particulate matter of retention is arranged by the bottom of surface filter
Out；
After filter Low Concentration Ammonia Containing Wastewater storage tank by the second waste water produce pump by after initial filter low ammonia nitrogen waste water be sent into ultrafiltration with
Nanofiltration system；For Low Concentration Ammonia Containing Wastewater storage tank by piping connection ultrafiltration and nanofiltration system, the second waste water produces pump setting after filter
On pipeline；
Ultrafiltration and nanofiltration system further filter Low Concentration Ammonia Containing Wastewater after initial filter, remove rare earth ion in solution, will
The Low Concentration Ammonia Containing Wastewater of removal rare earth ion is back to precipitating reagent required for preparing rare-earth precipitation process.
Preferably, Low Concentration Ammonia Containing Wastewater includes: Low Concentration Ammonia Containing Wastewater containing lanthanum, Low Concentration Ammonia Containing Wastewater containing cerium or contains
Lanthanum cerium Low Concentration Ammonia Containing Wastewater.
It is preferred: when the liquid level for filtering Low Concentration Ammonia Containing Wastewater in preceding Low Concentration Ammonia Containing Wastewater storage tank is higher than setting value, the
One waste water produces pump startup；When liquid level is lower than setting value, the first waste water, which produces pump, to be stopped.
Preferred: surface filter is provided with surface filter pressure gauge, and surface filter passes through piping connection surface mistake
Filter slag liquid hole, surface filter residual cake valve are arranged on pipeline；When surface filter pressure gauge shows that numerical value reaches setting value
When, surface filter residual cake valve automatically turns on, and is automatically closed after 3~60s of slag dumping, and slag liquid enters surface filter slag liquid hole.
Preferred: surface filter slag liquid hole is provided with slag liquid hole liquidometer, and surface filter slag liquid hole is connected by pipeline
It delivers a child producing line, slag liquid is provided on pipeline and produces pump；When the slag liquid liquid level in surface filter slag liquid hole is higher than setting value, slag liquid
Pump startup is produced, slag liquid is sent to production line and is re-used；When slag liquid liquid level is lower than setting value, slag liquid produces pump and stops.
Preferred: when waste water liquid level is higher than setting value in Low Concentration Ammonia Containing Wastewater storage tank after the filter, the second waste water produces pump
Starting, waste water produce automatically and enter ultrafiltration and nanofiltration system；When liquid level is lower than setting value, the second waste water, which produces pump, to be stopped.
The technology of the present invention effect includes:
The present invention had not only shortened Low Concentration Ammonia Containing Wastewater process flow, but also did not influenced product quality, and it is dilute to realize variety classes
The Low Concentration Ammonia Containing Wastewater mixing reuse that native carbonate products generate；It eliminates rare earth ion and other impurities ion pair rare earth produces
The influence of product, it is unified to prepare precipitating reagent；Good seal performance is selected simultaneously, the filter plant being automatically brought into operation can be achieved and suitable control
Mode processed improves equipment service efficiency, improves operating environment.
1, it is useless to realize variety classes rare earth product salt low-concentration ammonia-nitrogen for the process flow for shortening low ammonia nitrogen waste water processing
The mixing reuse of water.Compared with current low ammonia nitrogen waste water treatment process, process flow according to the present invention is short, high-efficient.No
Again to handle nitrogen-containing wastewater for the purpose of obtaining pure water, but the high valence ion in nitrogen-containing wastewater is filtered out, is directly utilized
The ammonia nitrogen waste water of the ion containing low price prepares precipitating reagent, is back to production line.Surface filter has filtered out the rare earth carbonic acid in waste water
Salt particle object, ultrafiltration and nanofiltration system further filter out the above ion of the divalent in waste water (including the rare earth being dissolved in waste water
Ion), to eliminate the shadow of rare earth ion and other impurities ion pair rare-earth products when Low Concentration Ammonia Containing Wastewater mixing is responded
It rings.
2, reduce new water consumption, and reduce wastewater discharge, significantly reduce enterprise's water cost.Low ammonia nitrogen waste water warp
It is back to preparation precipitating reagent after present invention process processing, 92400m3 can be saved water every year, the discharge amount of waste water can be reduced
20%, thus greatly reduce enterprise's water cost.
3, the continuity for realizing waste water filtering improves automatic operation level.Waste water storage tank is respectively mounted with slag liquid hole
Liquidometer produces pump interlocking with corresponding, realizes producing automatically for waste water, and liquid level, which is higher than, opens pump setting value, produces pump and opens automatically
Dynamic, liquid level is lower than termination of pumping setting value, produces pump and is automatically stopped；Surface filter blow valve and pressure gauge interlock, when pressure is higher than
When setting value, blow valve is automatically turned on, and slag dumping, which finishes, to be automatically closed.The selection of automatic control equipment makes entire filter process realize company
Continuous and automation, has been greatly reduced the labor intensity of worker.
Detailed description of the invention
Fig. 1 is the usage state diagram of the device of the recycling of Low Concentration Ammonia Containing Wastewater in the present invention.
Specific embodiment
Be described below and specific embodiments of the present invention be fully shown, with enable those skilled in the art to practice and
It reproduces.
As shown in Figure 1, being the usage state diagram of the device of the recycling of Low Concentration Ammonia Containing Wastewater in the present invention.
The device of the recycling of Low Concentration Ammonia Containing Wastewater include: Low Concentration Ammonia Containing Wastewater storage tank 1 before filtering, surface filtration
Low Concentration Ammonia Containing Wastewater storage tank 3, ultrafiltration and nanofiltration system 4 after device 2, filter；Low Concentration Ammonia Containing Wastewater storage tank 1, surface filtration before filtering
Low Concentration Ammonia Containing Wastewater storage tank 3, ultrafiltration pass sequentially through pipeline with nanofiltration system 4 and are connected after device 2 and filter；Low-concentration ammonia-nitrogen before filtering
The preceding storage tank liquidometer 11 of filter is provided on waste water storage tank 1, the first waste water produces pump 12 and is connected to Low Concentration Ammonia Containing Wastewater storage before filter
On pipeline between slot 1, surface filter 2；Surface filter 2 is provided with surface filter pressure gauge 21, and surface filter 2 is logical
Piping connection slag liquid hole 23 is crossed, the pipeline in surface filter bottom connection slag liquid hole 23 is arranged in surface filter residual cake valve 22
On；Slag liquid hole 23 is provided with slag liquid hole liquidometer 24, and the outlet in slag liquid hole 23 is provided with slag liquid and produces pump 25；Low concentration ammonia after filter
Nitrogen waste water storage tank 3 is provided with storage tank liquidometer 31 after filter, after filter Low Concentration Ammonia Containing Wastewater storage tank 3 and ultrafiltration and nanofiltration system 4 it
Between pipeline on be provided with the second waste water and produce pump 32.
Ultrafiltration includes the ultrafiltration system being connected and nanofiltration system with nanofiltration system 4, and ultrafiltration system is provided with ultrafiltration membrane (pressure
Power active membrane), nanofiltration system is provided with nanofiltration membrane.
The method that Low Concentration Ammonia Containing Wastewater recycles, the specific steps are as follows:
Step 1: to the Low Concentration Ammonia Containing Wastewater of the rare earth carbonate containing variety classes, being uniformly pooled to low-concentration ammonia-nitrogen before filter
Waste water storage tank 1, the Low Concentration Ammonia Containing Wastewater feeding table before the first waste water produces pump 12 and will filter in Low Concentration Ammonia Containing Wastewater storage tank 1
Face filter 2；
Low Concentration Ammonia Containing Wastewater includes: Low Concentration Ammonia Containing Wastewater containing lanthanum, Low Concentration Ammonia Containing Wastewater containing cerium, the low concentration of cerium containing lanthanum
Ammonia nitrogen waste water.
Storage tank liquidometer 11 links before first waste water produces pump 12 and filters, and realizes that waste water is automatically outer and turns.Storage tank liquid level before filtering
The numerical value of meter 11 is delivered in computer system in real time by 24V analog signal, and 11 numerical value of storage tank liquidometer, which is higher than, before filtering opens
When pumping setting value, computer system produces pump 12 to the first waste water and issues start command, and the first waste water produces 12 starting of pump；When
When liquid level is lower than termination of pumping setting value, computer system produces 12 sending of pump to the first waste water and ceases and desist order, and the first waste water produces pump
12 stop.
Step 2: selecting surface filter 2 to carry out prefiltration to Low Concentration Ammonia Containing Wastewater, remove in Low Concentration Ammonia Containing Wastewater
Solid particulate matter (rare earth carbonate particulate matter)；The clear liquid of filtered Low Concentration Ammonia Containing Wastewater is from 2 top of surface filter
Overflow enters Low Concentration Ammonia Containing Wastewater storage tank 3 after filter；
The solid particulate matter of retention escapes and enter slag liquid hole 23 by surface filter residual cake valve 22.Surface filter 2
Surface filter pressure gauge 21 and surface filter residual cake valve 22 link, realize automatic clinker-removing.
The numerical value of surface filter pressure gauge 21 is delivered in computer system in real time by 24V analog signal, works as surface
When filter pressure table 21 shows that numerical value reaches valve opening setting value, system issues open command to surface filter residual cake valve 22,
Surface filter residual cake valve 22 is opened, and is automatically closed after 3~60s of slag dumping, and slag liquid enters slag liquid hole 23.Slag liquid hole 23 is provided with slag
Liquid cheats liquidometer 24, and slag liquid hole 23 passes through piping connection production line, is provided with slag liquid on pipeline and produces pump 25.
Slag liquid cheats liquidometer 24 and slag liquid produces 25 linkage of pump, and automatic outer turn for realizing slag liquid returns to production line.Slag liquid hole
The numerical value of liquidometer 24 is delivered in computer system in real time by 24V analog signal, when the numerical value of slag liquid hole liquidometer 24 is high
When opening pump setting value, system produces 25 sending of pump to slag liquid and opens pump order, and slag liquid produces 25 starting of pump, slag liquid is sent to life
Producing line re-uses；When 24 numerical value of liquidometer is lower than termination of pumping setting value, system produces pump 25 to slag liquid and issues termination of pumping order, slag
Liquid, which produces pump 25, to be stopped.
Step 3: Low Concentration Ammonia Containing Wastewater storage tank 3 produces pump 32 by the second waste water and send low ammonia nitrogen waste water after initial filter after filter
Enter ultrafiltration and nanofiltration system 4；
Storage tank liquidometer 31, the second waste water produce 32 linkage of pump after filter.The numerical value of storage tank liquidometer 31 passes through 24V mould after filter
Quasi- signal is delivered in computer system in real time, and 31 numerical value of storage tank liquidometer is higher than after filter when opening pump setting value, and system is to the
Two waste water produce 32 sending of pump and open pump signal, and the second waste water produces 32 starting of pump, and low ammonia nitrogen waste water is produced and is sent into super after initial filter
Filter and nanofiltration system 4, when 31 numerical value of liquidometer is lower than termination of pumping setting value, system produces pump 32 to the second waste water and issues termination of pumping letter
Number, the second waste water, which produces pump 32, to be stopped.
Step 4: ultrafiltration further filters Low Concentration Ammonia Containing Wastewater after initial filter with nanofiltration system 4, removes rare earth in solution
The Low Concentration Ammonia Containing Wastewater for removing rare earth ion is back to precipitating reagent required for preparing rare-earth precipitation process by ion.
Low Concentration Ammonia Containing Wastewater enters ultrafiltration system after initial filter, and the pressure activated film of ultrafiltration system is in extraneous motive force
Under the action of (pressure), retention is greater than the suspended particulate substance of fenestra, and hydrone and molecular weight are less than the solute ions of 300-500
Through ultrafiltration membrane；After Low Concentration Ammonia Containing Wastewater enters nanofiltration system after the initial filter by ultrafiltration system, divalent and rare earth ion
Equal multivalent ions are retained by nanofiltration membrane, and hydrone and monovalent state ion pass through nanofiltration membrane.It is miscellaneous with divalent that rare earth ion will be eliminated
The Low Concentration Ammonia Containing Wastewater of matter ion is back to use production line, prepares precipitating reagent.
Low Concentration Ammonia Containing Wastewater do not filter before rare earth concentration be 0.1~0.2g/L, into carbonate products after mass fraction
It is 0.07%~0.14%, has great quality to influence the product of purity 99.99%；Through surface filter 2 and ultrafiltration and nanofiltration
After system 4 filters, in waste water rare earth concentration be 10mg/L hereinafter, into mass fraction after carbonate products be 0.007%, to pure
The product of degree 99.99% is influenced without obvious quality.
Embodiment 1
Take the impurity of rare earth ion containing La/Ce (rare earth ion total concentration is 0.02g/L), the rare earth that ammonia nitrogen concentration is 3g/L
Waste water 500L is precipitated, is added in surface filter, the waste water 495L for having been filtered out rare earth particulate matter is collected after filtering.It will be upper
It states waste water and is added to nanofiltration system operation, filter out rare earth ion, finally obtaining without rare earth ion, ammonia nitrogen concentration is the useless of 3g/L
This waste water is directly used in and prepares precipitating reagent (ammonium bicarbonate soln) used in rare-earth precipitation by water 405L.
Embodiment 2
Taking the impurity of rare earth ion containing La/Ce/Pr (rare earth ion total concentration is 0.02g/L), ammonia nitrogen concentration is the dilute of 3g/L
Soil precipitating waste water 500L, is added in surface filter, the waste water 495L for having been filtered out rare earth particulate matter is collected after filtering.It will
Above-mentioned waste water is added to nanofiltration system operation, filters out rare earth ion, and finally obtaining without rare earth ion, ammonia nitrogen concentration is 3g/L's
This waste water is directly used in and prepares precipitating reagent (ammonium bicarbonate soln) used in rare-earth precipitation by waste water 405L.
Embodiment 3
Take the impurity of rare earth ion containing Ce/Pr (rare earth ion total concentration is 0.02g/L), the rare earth that ammonia nitrogen concentration is 3g/L
Waste water 500L is precipitated, is added in surface filter, the waste water 495L for having been filtered out rare earth particulate matter is collected after filtering.It will be upper
It states waste water and is added to nanofiltration system operation, filter out rare earth ion, finally obtaining without rare earth ion, ammonia nitrogen concentration is the useless of 3g/L
This waste water is directly used in and prepares precipitating reagent (ammonium bicarbonate soln) used in rare-earth precipitation by water 405L.
It should be understood that the foregoing is merely a specific embodiment of the invention, but protection scope of the present invention is not
It is confined to this, anyone skilled in the art in the technical scope disclosed by the present invention, can readily occur in variation
Or replacement, it should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the claim
Protection scope subject to.
Claims (9)
1. a kind of device of the recycling of Low Concentration Ammonia Containing Wastewater characterized by comprising include: to pass sequentially through pipeline phase
Low Concentration Ammonia Containing Wastewater storage tank, ultrafiltration and nanofiltration system after Low Concentration Ammonia Containing Wastewater storage tank, surface filter, filter before the filter of connection
System；Be provided with storage tank liquidometer before filter before filtering on Low Concentration Ammonia Containing Wastewater storage tank, the first waste water produce pump be connected to it is low dense before filter
It spends on the pipeline between ammonia nitrogen waste water storage tank, surface filter；Surface filter is provided with surface filter pressure gauge, surface mistake
Filter is cheated by piping connection slag liquid, and surface filter residual cake valve is arranged on the pipeline in surface filter connection slag liquid hole；Slag
Liquid hole is provided with slag liquid hole liquidometer, and the outlet in slag liquid hole is provided with slag liquid and produces pump；Low Concentration Ammonia Containing Wastewater storage tank is set after filter
It is equipped with storage tank liquidometer after filter, the is provided on the pipeline after filter between Low Concentration Ammonia Containing Wastewater storage tank and ultrafiltration and nanofiltration system
Two waste water produce pump.
2. the device of the recycling of Low Concentration Ammonia Containing Wastewater as described in claim 1, which is characterized in that ultrafiltration and nanofiltration system
Including the ultrafiltration system being connected and nanofiltration system, ultrafiltration system is provided with ultrafiltration membrane, and nanofiltration system is provided with nanofiltration membrane.
3. the device of the recycling of Low Concentration Ammonia Containing Wastewater as described in claim 1, which is characterized in that surface filter deslagging
The bottom of surface filter is arranged in valve.
4. a kind of method that Low Concentration Ammonia Containing Wastewater recycles, comprising:
Low Concentration Ammonia Containing Wastewater is pooled to the preceding Low Concentration Ammonia Containing Wastewater storage tank of filter, the first waste water produces pump for low concentration ammonia before filter
Low Concentration Ammonia Containing Wastewater in nitrogen waste water storage tank is sent into surface filter；Low-concentration ammonia-nitrogen is arranged before filter in storage tank liquidometer before filtering
On waste water storage tank, Low Concentration Ammonia Containing Wastewater storage tank passes through pipeline after Low Concentration Ammonia Containing Wastewater storage tank, surface filter and filter before filtering
It is connected；First waste water produces pump and is connected on the pipeline before filtered between Low Concentration Ammonia Containing Wastewater storage tank, surface filter；
It selects surface filter to carry out prefiltration to Low Concentration Ammonia Containing Wastewater, removes the solid particulate matter in waste water；It is filtered
The clear liquid of Low Concentration Ammonia Containing Wastewater from the overflow of surface filter top enter filter after Low Concentration Ammonia Containing Wastewater storage tank, low concentration after filter
Ammonia nitrogen waste water storage tank is provided with storage tank liquidometer after filter；The solid particulate matter of retention is discharged by the bottom of surface filter；
Low Concentration Ammonia Containing Wastewater storage tank produces pump by the second waste water and low ammonia nitrogen waste water after initial filter is sent into ultrafiltration and nanofiltration after filter
System；By piping connection ultrafiltration and nanofiltration system, the second waste water produces pump and is arranged in pipe Low Concentration Ammonia Containing Wastewater storage tank after filter
On the road；
Ultrafiltration and nanofiltration system further filter Low Concentration Ammonia Containing Wastewater after initial filter, remove rare earth ion in solution, will remove
The Low Concentration Ammonia Containing Wastewater of rare earth ion is back to precipitating reagent required for preparing rare-earth precipitation process.
5. the method that Low Concentration Ammonia Containing Wastewater as claimed in claim 4 recycles, which is characterized in that Low Concentration Ammonia Containing Wastewater packet
It includes: Low Concentration Ammonia Containing Wastewater containing lanthanum, Low Concentration Ammonia Containing Wastewater containing cerium or the Low Concentration Ammonia Containing Wastewater of cerium containing lanthanum.
6. the method that Low Concentration Ammonia Containing Wastewater as claimed in claim 4 recycles, it is characterised in that: the low-concentration ammonia-nitrogen before filtering
When the liquid level of Low Concentration Ammonia Containing Wastewater is higher than setting value in waste water storage tank, the first waste water produces pump startup；When liquid level is lower than setting
When value, the first waste water, which produces pump, to be stopped.
7. the method that Low Concentration Ammonia Containing Wastewater as claimed in claim 4 recycles, it is characterised in that: surface filter is provided with
Surface filter pressure gauge, surface filter are cheated by piping connection surface filter slag liquid, the setting of surface filter residual cake valve
On pipeline；When surface filter pressure gauge shows that numerical value reaches setting value, surface filter residual cake valve is automatically turned on, slag dumping
It is automatically closed after 3~60s, slag liquid enters surface filter slag liquid hole.
8. the method that Low Concentration Ammonia Containing Wastewater as claimed in claim 7 recycles, it is characterised in that: surface filter slag liquid hole
It is provided with slag liquid hole liquidometer, surface filter slag liquid hole passes through piping connection production line, is provided with slag liquid on pipeline and produces pump；
When the slag liquid liquid level in surface filter slag liquid hole is higher than setting value, slag liquid produces pump startup, and slag liquid is sent to production line again
It utilizes；When slag liquid liquid level is lower than setting value, slag liquid produces pump and stops.
9. the method that Low Concentration Ammonia Containing Wastewater as claimed in claim 7 recycles, it is characterised in that: low-concentration ammonia-nitrogen after filter
When waste water liquid level is higher than setting value in waste water storage tank, the second waste water produces pump startup, and waste water produces automatically and enters ultrafiltration and receive
Filter system；When liquid level is lower than setting value, the second waste water, which produces pump, to be stopped.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811342444.8A CN109354229A (en) | 2018-11-13 | 2018-11-13 | Device and method for recycling low-concentration ammonia nitrogen wastewater |
| CN202410820642.XA CN119038638A (en) | 2018-11-13 | 2018-11-13 | Method for recycling low-concentration ammonia nitrogen wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN119038638A (en) | 2024-11-29 |
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