CN111099709A - Seawater potassium removal method - Google Patents
Seawater potassium removal method Download PDFInfo
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- CN111099709A CN111099709A CN201911343526.9A CN201911343526A CN111099709A CN 111099709 A CN111099709 A CN 111099709A CN 201911343526 A CN201911343526 A CN 201911343526A CN 111099709 A CN111099709 A CN 111099709A
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- seawater
- potassium
- stirring
- metering pump
- precipitant
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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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
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention belongs to the field of seawater treatment, and discloses a method for removing potassium from seawater, which uses a seawater potassium removal device; the method for removing potassium from seawater comprises the following steps: respectively placing a seawater sample and a precipitant in a first storage tank and a second storage tank, injecting the seawater sample into a stirring tank through a first metering pump for stirring, injecting the precipitant into a second metering pump in the stirring process, and filtering through a filter to obtain the seawater subjected to potassium removal. The seawater potassium removal method can effectively remove potassium element in seawater, is short in time consumption, and meets actual requirements.
Description
Technical Field
The invention belongs to the field of seawater treatment, and particularly relates to a seawater potassium removal method.
Background
However, the radioactivity concentration of 40K (potassium-40) in the seawater (about 12.3Bq/L) is far higher than that of other β radionuclides in the seawater, and the detection of the total radioactivity of β in the seawater cannot truly reflect the amount of the artificial radionuclides discharged during the operation of the nuclear facility, so that the 40K in the seawater needs to be removed, and the detected total radioactivity of β can truly reflect the radiation influence of the artificial radionuclides on the seawater environment.
In the prior art, a PAN-chelated iron-barium coprecipitation method is commonly adopted for removing potassium element in seawater, namely, iron, barium and PAN (1- (2-pyridylazo) -2-naphthol) are added into a seawater sample and then uniformly stirred, then 1:1 ammonia water is added to adjust the pH value of the water sample, flocculent precipitate stands for more than 5 hours, then the precipitate is subjected to suction filtration, ignition and sample preparation, so that potassium element is collected, and total β radioactive detection is carried out on other radioactive metal nuclides except for the potassium element.
The method cannot determine the chemical recovery rate of the potassium element accurately and cannot correct the recovery rate, so that certain influence is caused on the detection result, and the detection is inaccurate; meanwhile, because the generation of the flocculent precipitate needs to be kept still for a long time, the time consumption (about 2 days) for completing the whole sample preparation and measurement process cannot realize real-time online detection.
Therefore, the invention hopes to provide a seawater potassium removal method which is short in time consumption and can effectively remove potassium element.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a seawater potassium removal method, which can effectively remove potassium element in seawater, is short in time consumption and meets the actual requirement.
A method for removing potassium from seawater comprises using a seawater potassium removing device, wherein the seawater potassium removing device comprises a stirring tank provided with a first liquid inlet, a second liquid inlet and a discharge outlet; a liquid outlet of the first storage tank is communicated with a first metering pump and is communicated with the first liquid inlet through the first metering pump; a liquid outlet of the second storage tank is communicated with a second metering pump and is communicated with the second liquid inlet through the second metering pump; the feed inlet of the filter is communicated with a flow pump and is communicated with the discharge outlet through the flow pump;
respectively placing a seawater sample and a precipitant in a first storage tank and a second storage tank, injecting the seawater sample into a stirring tank through a first metering pump for stirring, injecting the precipitant into a second metering pump in the stirring process, and filtering through a filter to obtain the seawater subjected to potassium removal.
The seawater sample is the seawater which is not subjected to potassium removal and is to be detected for β radionuclide, the precipitant is added during stirring, potassium ions in the seawater can quickly form precipitate, and the precipitate is removed through the filter, so that the time for removing potassium from the seawater can be effectively shortened.
Preferably, the filter is a Y-filter or a centrifugal filter.
Preferably, the volume ratio of the seawater sample injected into the stirring tank to the precipitator is (40-50): 1.
preferably, the precipitator is a potassium ion precipitator, and the potassium ion precipitator is a calcium hexanitrodiphenylamine solution.
More preferably, the concentration of calcium hexanitrodiphenylamine in the precipitating agent is 200-250 g/L.
Preferably, the agitator tank includes the jar body and all installs stirring rake and agitator motor on the jar body, the stirring rake with agitator motor connects.
Preferably, the rotating speed of the stirring is 40-100 r/min.
Preferably, the stirring time is 20-50 min.
Preferably, the seawater potassium removal device further comprises a PLC controller (programmable logic controller), and the PLC controller is electrically connected to the stirring motor, the first metering pump, the second metering pump and the flow pump respectively.
More preferably, a liquid level sensor is arranged in the second storage tank, and the liquid level sensor is electrically connected with the PLC.
Preferably, the second storage tank is provided with a volume scale.
Preferably, the PLC controller is also electrically connected with an alarm module.
Compared with the prior art, the invention has the following beneficial effects:
(1) by adopting the method for removing potassium from seawater, the precipitation of potassium ions can be realized only by adding a precipitator into a seawater sample and stirring for 20-50min, so that the time spent on removing potassium from seawater is greatly shortened;
(2) by adopting the seawater potassium removal method, good potassium removal effect can be achieved, and the removal rate of potassium ions can reach 99.87% at most.
Drawings
FIG. 1 is a schematic view of a seawater potassium removal apparatus used in example 1;
fig. 2 is a schematic block diagram of a circuit of the seawater potassium removal device used in embodiment 1.
Detailed Description
In order to make the technical solutions of the present invention more apparent to those skilled in the art, the following examples are given for illustration. It should be noted that the following examples are not intended to limit the scope of the claimed invention.
Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, the first and second descriptions are only used for distinguishing technical features, and are not understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.
In the description of the present invention, unless otherwise explicitly defined, terms such as arrangement, installation, connection and the like should be broadly construed, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the detailed contents of the technical solutions.
Example 1
A method for removing potassium from seawater, which uses a seawater potassium removing device.
As shown in fig. 1, the seawater potassium removing device comprises a stirring tank 100, a first storage tank 200, a second storage tank 300 and a filter 400, wherein the stirring tank 100 is provided with a first liquid inlet, a second liquid inlet and a discharge outlet; a liquid outlet of the first storage tank 200 is communicated with a first metering pump 210 and is communicated with a first liquid inlet through the first metering pump 210; a liquid outlet of the second storage tank 300 is communicated with a second metering pump 310 and is communicated with a second liquid inlet through the second metering pump 310; the inlet of the filter 400 is connected with a flow pump 410 and is connected with the outlet through the flow pump 410.
Wherein, agitator tank 100 includes the jar body and all installs stirring rake and agitator motor 110 on the jar body, and the stirring rake is connected with agitator motor 110, and agitator motor 110 drive stirring rake rotates to stir the internal solution of jar.
The method for removing potassium from seawater specifically comprises the following steps: respectively placing a seawater sample and a precipitant solution in a first storage tank 200 and a second storage tank 300, injecting the seawater sample into a stirring tank 100 through a first metering pump 210, and stirring at a rotation speed of 60 r/min; in the stirring process, a precipitator of calcium hexanitrodiphenylamine solution is injected by a second metering pump 310, and the concentration is 220 g/L; and after the injection of the precipitant is finished, stirring for 20 minutes to enable potassium ions in the seawater to quickly form precipitate, and filtering the precipitate through a filter 400, wherein the filter 400 is a Y-shaped filter. The mixed liquid in the stirring tank 100 can be filtered without standing after stirring, and the time for removing potassium by seawater can be shortened.
The first metering pump 210 and the second metering pump 310 can accurately control the consumption of the seawater sample and the precipitant, and the volume ratio of the seawater sample to the precipitant is controlled to be 45: 1. the second metering pump 310 can also inject a precipitant at a uniform flow rate, so that accurate proportioning is realized, waste is avoided, and cost saving is facilitated. The precipitator reacts with potassium ions in the seawater sample to form precipitates, other components in the seawater sample are not affected, the aim of accurately removing potassium elements is fulfilled, and the detection result of the artificial radionuclide in the seawater is accurate and reliable.
As shown in fig. 2, in order to improve the automation degree of sampling, the seawater potassium removal device further includes a PLC controller 500, and the PLC controller 500 is electrically connected to the stirring motor 110, the first metering pump 210, the second metering pump 310, and the flow pump 410, respectively. The injection amount of the seawater sample can be set through the PLC 500, the dosage and the flow rate of the precipitant solution can be accurately controlled according to the injection amount of the seawater sample, and the stirring time of the stirring tank can be set, so that real-time online detection can be realized.
A liquid level sensor 320 is further disposed in the second storage tank 300, and the liquid level sensor 320 is electrically connected to the PLC controller 500. The liquid level sensor 320 can monitor the residual amount of the precipitant solution in the second storage tank 300 in real time, and prevent potassium ions from remaining in the filtered seawater sample due to insufficient precipitant solution. To facilitate visual observation, the second tank 300 is provided with a volume scale to help inform the remaining amount of the precipitant to replenish.
By adopting the method for removing potassium from seawater in the embodiment 1, the precipitation of potassium element in seawater can be completed only in 30min, and the result of detecting the treated seawater sample shows that the removal rate of potassium ions in seawater is 99.87%.
Example 2
Compared with the example 1, the seawater potassium removing device used in the seawater potassium removing method in the example 2 is the same, and the difference is that: the concentration of the precipitant is 200 g/L; the volume ratio of the seawater sample injected into the stirring tank to the precipitator is 50: 1; the stirring speed is 40r/min, and the total stirring time is 40 min.
By adopting the method for removing potassium from seawater in the embodiment 2, the precipitation of potassium element in seawater can be completed in only 40min, and the result of detecting the treated seawater sample shows that the removal rate of potassium ions in seawater is 99.13%.
Example 3
Compared with the example 1, the seawater potassium removing device used in the seawater potassium removing method in the example 3 is the same, and the difference is that: the concentration of the precipitating agent is 250 g/L; the volume ratio of the seawater sample injected into the stirring tank to the precipitator is 40: 1; the stirring speed is 60r/min, and the total stirring time is 25 min.
By adopting the method for removing potassium from seawater in the embodiment 3, the precipitation of potassium element in seawater can be completed in only 25min, and the result of detecting the treated seawater sample shows that the removal rate of potassium ions in seawater is 98.68%.
Claims (9)
1. A method for removing potassium from seawater, characterized by using a seawater potassium removal device, the seawater potassium removal device comprising:
the stirring tank is provided with a first liquid inlet, a second liquid inlet and a discharge port;
a liquid outlet of the first storage tank is communicated with a first metering pump and is communicated with the first liquid inlet through the first metering pump;
a liquid outlet of the second storage tank is communicated with a second metering pump and is communicated with the second liquid inlet through the second metering pump;
the feed inlet of the filter is communicated with a flow pump and is communicated with the discharge outlet through the flow pump;
the seawater potassium removal method comprises the following steps: respectively placing a seawater sample and a precipitant in a first storage tank and a second storage tank, injecting the seawater sample into a stirring tank through a first metering pump for stirring, injecting the precipitant into a second metering pump in the stirring process, and filtering through a filter to obtain the seawater subjected to potassium removal.
2. The method of claim 1, wherein the agitator tank comprises a tank body, and an agitator paddle and an agitator motor both mounted on the tank body, the agitator paddle being connected to the agitator motor.
3. The method according to claim 1 or 2, wherein the seawater potassium removal device further comprises a PLC controller, and the PLC controller is electrically connected with the stirring motor, the first metering pump, the second metering pump and the flow pump respectively.
4. The method of claim 1, wherein the filter is a Y-filter or a centrifugal filter.
5. The method of claim 1, wherein the volume ratio of the seawater sample injected into the stirred tank to the precipitant is (40-50): 1.
6. a method according to claim 5, characterized in that the precipitant is a calcium hexanitrodiphenylamine solution.
7. The method as claimed in claim 6, wherein the concentration of calcium hexanitrodiphenylamine in the precipitant is 200-250 g/L.
8. The method according to claim 6, wherein the rotation speed of the stirring is 40-100 r/min.
9. The method of claim 6, wherein the stirring time is 20-50 min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911343526.9A CN111099709A (en) | 2019-12-24 | 2019-12-24 | Seawater potassium removal method |
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| CN201911343526.9A CN111099709A (en) | 2019-12-24 | 2019-12-24 | Seawater potassium removal method |
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Citations (5)
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| CN1199710A (en) * | 1997-04-18 | 1998-11-25 | 塔里木科学采矿及探油公司 | Process for recovery of lithium and other metals and salts from brines in helminthoid evaporating system using solar energy |
| CN102099296A (en) * | 2008-07-18 | 2011-06-15 | 里肯锂有限公司 | A process for recovering lithium from a brine |
| CN102936067A (en) * | 2012-11-23 | 2013-02-20 | 天津凯铂能膜工程技术有限公司 | Method for selectively removing calcium ions from concentrated water byproduct of sea water desalination process and other high-calcium-magnesium-content concentrated brines |
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| CN108314162A (en) * | 2018-04-17 | 2018-07-24 | 天津理工大学 | The method for removing potassium of the aqueous solution containing sylvite under a kind of acidic environment |
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2019
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| CN1199710A (en) * | 1997-04-18 | 1998-11-25 | 塔里木科学采矿及探油公司 | Process for recovery of lithium and other metals and salts from brines in helminthoid evaporating system using solar energy |
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| US20140042362A1 (en) * | 2012-08-07 | 2014-02-13 | Exxonmobil Research And Engineering Company | In situ generation of polysulfide ions using elemental sulfur for improved corrosion control, cyanide management, mercury management, arsine management and performance and reliability of acid gas removal equipment |
| CN102936067A (en) * | 2012-11-23 | 2013-02-20 | 天津凯铂能膜工程技术有限公司 | Method for selectively removing calcium ions from concentrated water byproduct of sea water desalination process and other high-calcium-magnesium-content concentrated brines |
| CN108314162A (en) * | 2018-04-17 | 2018-07-24 | 天津理工大学 | The method for removing potassium of the aqueous solution containing sylvite under a kind of acidic environment |
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Application publication date: 20200505 |