CN110963600A - Waste liquid recycling method and system for water quality analyzer - Google Patents
Waste liquid recycling method and system for water quality analyzer Download PDFInfo
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- CN110963600A CN110963600A CN201911127180.9A CN201911127180A CN110963600A CN 110963600 A CN110963600 A CN 110963600A CN 201911127180 A CN201911127180 A CN 201911127180A CN 110963600 A CN110963600 A CN 110963600A
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- 239000002699 waste material Substances 0.000 title claims abstract description 264
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- 238000000034 method Methods 0.000 title claims abstract description 61
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- 238000001223 reverse osmosis Methods 0.000 claims description 22
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- 229910002651 NO3 Inorganic materials 0.000 description 2
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- 238000004737 colorimetric analysis Methods 0.000 description 2
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 239000003651 drinking water Substances 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910001437 manganese ion Inorganic materials 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
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- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
-
- 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
-
- 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
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Hydrology & Water Resources (AREA)
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Abstract
The invention discloses a method and a system for recycling waste liquid of a water quality analyzer in the technical field of sewage treatment, and aims to solve the technical problems of complex process, high material consumption and high energy consumption cost in the prior art of performing harmless treatment on the waste liquid generated by the water quality on-line analyzer. The method comprises the following steps: based on the water requirement of the second water quality analyzer and the waste liquid characteristics of the first water quality analyzer, treating the waste liquid of the first water quality analyzer, and eliminating interference factors influencing the measurement of the second water quality analyzer in the waste liquid of the first water quality analyzer; and taking the treated waste liquid as clear liquid for a second water quality analyzer.
Description
Technical Field
The invention relates to a method and a system for recycling waste liquid of a water quality analyzer, and belongs to the technical field of sewage treatment.
Background
The water quality on-line analyzer can realize the on-line monitoring of the water environment quality and is mainly applied to a water quality automatic monitoring station. The water quality on-line analyzer is used for realizing measurement after adding a proper chemical reagent to generate chemical reaction with a target substance to be measured based on the characteristics of the target substance to be measured. At present, most of water quality online analyzers applied in the market of China mainly comprise ammonia nitrogen, total phosphorus, total nitrogen, permanganate index, chemical oxygen demand, part of heavy metal online analyzers and the like, and various water quality online analyzers are usually intensively arranged in an automatic water quality monitoring station to facilitate management. The measuring process can be generally summarized as rinsing a water sample to be measured, chemically treating (digesting) and measuring the water sample, and cleaning a pipeline system, and the measuring method mainly comprises a colorimetric method, a titration method, an ion selective electrode method, an anode dissolution method and the like. The reagent composition formula of most manufacturers is disclosed, and the related reagents mainly comprise acid, alkali, an oxidizing agent, a reducing agent, a color developing agent, a masking agent, a standard solution of a substance to be detected and the like.
The waste liquid produced after the measurement of the online water quality analyzer is very easy to generate secondary pollution, the waste liquid usually comprises rinsing waste liquid of a water sample instrument pipeline system, measuring waste liquid after a reaction reagent is added and cleaning waste liquid for cleaning the pipeline system after the measurement is completed, and the cleaning waste liquid is usually two to three times of the measuring waste liquid for ensuring the reliability of the measurement of the instrument.
At present, a common method for treating waste liquid of an online water quality analyzer is to store the waste liquid by using a collection container and transfer the waste liquid to a professional waste liquid treatment mechanism for treatment when a certain amount of the waste liquid is accumulated. However, the online water quality analyzer is frequent in monitoring frequency, large in waste liquid amount, and distributed in water quality automatic monitoring stations, especially surface water quality automatic monitoring stations are generally far from urban areas, so that transportation management and treatment costs are high. How to effectively treat the waste liquid and reduce the discharge of the waste liquid is a technical problem to be solved urgently by technical personnel in the field.
At present, technicians propose some waste liquid treatment schemes, and waste liquid generated by a water quality on-line analyzer is subjected to harmless treatment and is directly discharged after treatment. However, the components of the waste liquid of the water quality on-line analyzer are complex, all the waste liquid is directly subjected to harmless treatment, the process is complex, the material consumption and energy consumption cost are high, an effective detection means is lacked for the treated waste liquid, and the harmless discharge of the treated waste liquid can not be ensured continuously and stably.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a method and a system for recycling waste liquid of a water quality analyzer, so as to solve the technical problems of complex process, high material consumption and energy consumption cost for performing harmless treatment on the waste liquid generated by the water quality on-line analyzer in the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a water quality analyzer waste liquid recycling method comprises the following steps:
based on the water requirement of the second water quality analyzer and the waste liquid characteristics of the first water quality analyzer, treating the waste liquid of the first water quality analyzer, and eliminating interference factors influencing the measurement of the second water quality analyzer in the waste liquid of the first water quality analyzer;
and taking the treated waste liquid as clear liquid for a second water quality analyzer.
Further, the method for eliminating the interference factor includes: removing interfering substances, adjusting pH value, and adjusting turbidity.
Further, the method for removing the interfering substance comprises the following steps: and performing at least one of chemical treatment, filtration treatment, adsorption treatment, reverse osmosis treatment and ion exchange treatment on the waste liquid of the first water quality analyzer.
Further, the method for adjusting the pH value comprises the following steps: and carrying out acid-base neutralization treatment on the waste liquid of the first water quality analyzer.
Further, the adjusting method of the turbidity comprises the following steps: and performing at least one of filtration treatment, adsorption treatment and reverse osmosis treatment on the waste liquid of the first water quality analyzer.
Further, the waste liquid comprises: at least one of a rinsing waste liquid, a measuring waste liquid, and a cleaning waste liquid of the first water quality analyzer.
Further, before the treated waste liquid is used as a clear liquid for a second water quality analyzer, the method further comprises the following steps:
detecting the treated waste liquid;
and if the detection result shows that the treated waste liquid does not meet the water use requirement of the second water quality analyzer, the treated waste liquid is sent out for treatment, or the treatment process is optimized and the treated waste liquid is treated according to the optimized treatment process.
In order to achieve the purpose, the invention also provides a waste liquid recycling system of the water quality analyzer, which comprises a waste liquid temporary storage module, a waste liquid treatment module and a clear liquid collection module which are sequentially communicated, wherein the waste liquid temporary storage module is externally connected with the first water quality analyzer, the clear liquid collection module is externally connected with the second water quality analyzer, and the waste liquid temporary storage module is used for collecting waste liquid of the first water quality analyzer;
the waste liquid treatment module is used for treating the waste liquid of the first water quality analyzer based on the water requirement of the second water quality analyzer and the waste liquid characteristics of the first water quality analyzer, and eliminating interference factors which influence the measurement of the second water quality analyzer in the waste liquid of the first water quality analyzer;
the clear liquid collection module is used for triggering the second water quality analyzer to detect the processed waste liquid or/and using the processed waste liquid as clear liquid for the second water quality analyzer.
Further, the waste liquid treatment module comprises at least one of a chemical treatment module, a filtering module and an adsorption module which are communicated with each other;
the chemical treatment module is used for carrying out chemical treatment on the waste liquid of the first water quality analyzer;
the filtering module is used for filtering the waste liquid of the first water quality analyzer;
the adsorption module is used for adsorbing waste liquid of the first water quality analyzer.
Further, the waste liquid treatment module further comprises at least one of an acid-base neutralization module, a reverse osmosis module and an ion exchange module which are communicated with one another;
the acid-base neutralization module is used for carrying out acid-base neutralization treatment on the waste liquid of the first water quality analyzer;
the reverse osmosis module is used for performing reverse osmosis treatment on the waste liquid of the first water quality analyzer;
the ion exchange module is used for carrying out ion exchange treatment on the waste liquid of the first water quality analyzer.
Compared with the prior art, the invention has the following beneficial effects: the method and the system of the invention utilize the waste liquid temporary storage module to collect the waste liquid of the first water quality analyzer, utilize the waste liquid treatment module to eliminate the interference factor which influences the measurement of the second water quality analyzer in the waste liquid of the first water quality analyzer, utilize the clear liquid collection module to take the treated waste liquid as clear liquid for the second water quality analyzer to use, and can trigger the second water quality analyzer to measure the clear liquid to judge whether the clear liquid meets the water requirement. The waste liquid treatment module comprises one or more of a chemical treatment module, a filtering module, an adsorption module, an acid-base neutralization module, a reverse osmosis module and an ion exchange module, can carry out diversified treatment on the waste liquid of the first water quality analyzer, and can improve a treatment process as required to meet the water requirement of the second water quality analyzer. The method and the system of the invention recycle the waste liquid generated by the water quality on-line analyzer on the basis of ensuring the measurement, reduce the discharge amount of the waste liquid, and reduce the process difficulty and the operation and maintenance cost.
Drawings
Fig. 1 is a schematic diagram of the overall structure of an embodiment of the system of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The specific implementation mode of the invention provides a waste liquid recycling system of a water quality analyzer, and as shown in figure 1, the overall structure of the embodiment of the system is schematic. The system comprises a waste liquid temporary storage module, a chemical treatment module, an adsorption/filtration module, an acid-base neutralization module, a reverse osmosis/ion exchange module and a clear liquid collection module which are sequentially communicated, wherein the waste liquid temporary storage module is externally connected with a first water quality analyzer, and the clear liquid collection module is externally connected with a second water quality analyzer. In this embodiment, the first water quality analyzer and the second water quality analyzer are both water quality on-line analyzers; the chemical treatment module, the adsorption/filtration module, the acid-base neutralization module and the reverse osmosis/ion exchange module jointly form a waste liquid treatment module of the system.
Waste liquid module of keeping in can with first water quality analyzer communication, can carry out the selectivity to first water quality analyzer's rinse waste liquid, measurement waste liquid, washing waste liquid and collect, the volume of measurable quantity collected waste liquid when the volume reaches the preset threshold value, arranges the waste liquid of collecting to the chemical treatment module. Wherein the rinsing waste liquid is generated by rinsing the first water quality analyzer with water to be measured; the measurement waste liquid comprises water to be measured and an added chemical reagent; the wash effluent includes wash water and a small amount of measurement effluent residue. For the technical personnel of the automatic water quality monitoring station, the main components and the content of each waste liquid are known, so that whether the waste liquid of the first water quality analyzer has the utilization value or not can be analyzed according to the water demand of the second water quality analyzer, the waste liquid with the larger utilization value is collected to the temporary waste liquid storage module, the waste liquid with the small utilization value is directly sent to a third-party professional institution to be processed, and the system is preset. Because waste liquid module of keeping in can with first water quality analyzer communication, can in time know when what kind of waste liquid of discharging of first water quality analyzer, collect the specific waste liquid of first water quality analyzer according to preset to do benefit to balanced system running cost and waste liquid utilization ratio, thereby improve the system performance price ratio.
The chemical treatment module adds a chemical reagent to carry out chemical treatment on the interference substances in the waste liquid of the first water quality analyzer according to the water requirement (the interference substance content, the pH value, the turbidity and the like influencing the measurement) of the second water quality analyzer and the waste liquid characteristics (the chemical substance composition and property, the chemical substance content, the pH value, the turbidity and the like) of the first water quality analyzer, so that the interference substance content is reduced to be within the specified standard. The chemical treatment module is provided with a process feedback sensor such as a pH meter, a conductivity meter, a thermometer and the like, and further comprises basic auxiliary devices such as heating, stirring and the like, and is provided with a circulating liquid inlet, a circulating liquid outlet and a sludge discharge port. The waste liquid self-circulation liquid inlet enters the chemical treatment module, chemical reagents are put into the chemical treatment module, interference substances in the waste liquid of the first water quality analyzer are removed or shielded through measures such as precipitation, complexation and oxidation, the treated waste liquid flows to the adsorption/filtration module from the circulation liquid outlet, and precipitates and waste residues generated in the treatment process are discharged from the sludge discharge port. By adding a proper chemical reagent, the chemical treatment module can also adjust the pH value of the circulating liquid so as to meet the pH value requirement of water for the second water quality analyzer.
The adsorption/filtration module is usually composed of adsorption materials such as activated carbon and zeolite, and filter materials such as PP cotton and composite membranes, and aims to remove particulate substances in waste liquid and untreated and thorough adsorbable interfering substances in the chemical treatment module so as to meet the requirement of the turbidity of water for the second water quality analyzer.
The pH value neutralization module is an optional module with a pH value feedback sensor arranged inside, and aims to adjust the pH value of the waste liquid treated by the chemical treatment module and the adsorption/filtration module, so that the pH value requirement of water for the second water quality analyzer is further met.
The reverse osmosis/ion exchange module is also an optional module, and generally, under the condition that the requirement on water consumption of the second water quality analyzer is higher, the waste liquid treated by the chemical treatment module, the adsorption/filtration module and the acid-base neutralization module is subjected to reverse osmosis/ion exchange treatment to remove various chemical substances and particulate substances in the waste liquid, so that the requirements on the content of interfering substances and the turbidity of the water consumption of the second water quality analyzer are further met.
The clear liquid collection module is used for temporarily storing the treated waste liquid as clear liquid for the second water quality analyzer to use, and can trigger the second water quality analyzer to measure and judge whether the clear liquid meets the water requirement or not.
The specific embodiment of the invention provides a water quality analyzer waste liquid recycling method, which is realized based on a water quality analyzer waste liquid recycling system provided by the specific embodiment of the invention, and comprises the following steps:
step one, matching the water requirement of a second water quality analyzer with the waste liquid characteristics of a first water quality analyzer to obtain interference factors influencing the measurement of the second water quality analyzer in the waste liquid of the first water quality analyzer. The interference factors comprise one or more of excessive content of interference substances, excessive pH value and excessive turbidity. The waste liquid can be one or more of rinsing waste liquid, measuring waste liquid and cleaning waste liquid of the first water quality analyzer. For technicians in the automatic water quality monitoring station, the characteristics of the waste liquid of the first water quality analyzer and the water consumption requirements of the second water quality analyzer are known conditions, so that specific waste liquid can be selected from the waste liquid discharged by the first water quality analyzer in advance to be used as a collection and treatment object. In this embodiment, the first water quality analyzer and the second water quality analyzer are both water quality on-line analyzers.
And step two, the waste liquid temporary storage module collects waste liquid discharged by the first water quality analyzer according to a preset program.
① the elimination of the excessive interference substance, firstly, the chemical treatment module carries out chemical treatment on the collected waste liquid of the first water quality analyzer, then, the adsorption/filtration module carries out adsorption/filtration treatment on the completely untreated adsorbable interference substance, ② the elimination of the excessive pH value can also adopt a chemical treatment method, if the chemical treatment still can not meet the pH value requirement of the water used by the second water quality analyzer, the acid-base neutralization module carries out acid-base neutralization treatment on the waste liquid which does not reach the standard, ③ the elimination of the turbidity, the adsorption/filtration module generally carries out adsorption/filtration treatment on the waste liquid to remove the particulate substance in the waste liquid, and the waste liquid can be treated by the reverse osmosis ion exchange under the condition that the water used by the second water quality analyzer is higher than the requirement.
And fourthly, temporarily storing the processed waste liquid as a clear liquid for a second water quality analyzer by the clear liquid collecting module according to a preset program, triggering the second water quality analyzer to measure the clear liquid, and judging whether the clear liquid meets the water consumption requirement. If the water quality of the waste liquid is detected to be not satisfactory to the water requirement of the second water quality analyzer, the treated waste liquid can be directly delivered to a third-party professional institution for treatment, and the waste liquid treatment process can also be optimized and treated according to the optimized treatment process. The optimization of the waste liquid treatment process can change the added chemical reagent to enhance the chemical treatment effect, can also improve the adsorption material in the adsorption/filtration module to enhance the adsorption/filtration treatment effect, and can also utilize the reverse osmosis/ion exchange module to perform reverse osmosis/ion exchange treatment on the waste liquid to remove various chemical substances and granular substances in the waste liquid.
The process of the present invention is further illustrated below with reference to examples.
Example 1:
the first water quality analyzer is an alkaline potassium persulfate oxidation-ultraviolet visible light photometry principle total nitrogen online analyzer; the second water quality analyzer is an ammonia nitrogen online analyzer based on the ammonia gas sensitive electrode principle, and a field water sample is relatively complex. The fact that the water sample is relatively complex means that: the water sample contains more pollutants, the measurement parameters (ammonia nitrogen content in the example) of the second water quality analyzer are higher, and interference substances which influence the second water quality analyzer may originally exist in the water sample.
The water used by the second water quality analyzer is required to be free of interfering substances (or the content of the interfering substances is lower than a certain limit value) such as ammonia nitrogen and a surfactant, the aqueous solution is neutral, and impurities which can cause pipeline blockage are not contained. The waste liquid of the first water quality analyzer mainly comprises: (a) rinsing the waste liquid: rinsing raw water of a pipeline system of the water quality analyzer; (b) and (3) measuring waste liquid: the raw water contains chemical substances and chemical substances after reaction such as sodium hydroxide, potassium persulfate, hydrochloric acid and the like added in the measurement of an analyzer, wherein the ion composition mainly comprises sodium ions, potassium ions, sulfate ions, chloride ions, nitrate ions and the like (in the measurement process of a total nitrogen analyzer, ammonia nitrogen and other substances are oxidized into nitrate ions); (c) cleaning waste liquid: the method is mainly used for measuring the minimum concentration of substances contained in the waste liquid (namely, a small amount of the waste liquid is remained on the pipe wall after being discharged, and the content of the waste liquid is low because the residual is removed by cleaning through an analyzer and enters the cleaning waste liquid).
Combine second water quality analyzer water requirement, get first water quality analyzer washing waste liquid and handle, waste liquid cyclic utilization system mainly is waste liquid module of keeping in, chemical treatment module, absorption/filtration module and clear liquid module of keeping in and constitutes. The specific treatment method comprises the following steps: 1) the waste liquid temporary storage module selectively collects the cleaning waste liquid of the first water quality analyzer, temporarily stores the cleaning waste liquid, and guides the waste liquid into the chemical treatment module when the volume of the waste liquid reaches a preset volume; 2) In the chemical treatment module, a certain volume of 5% EDTA-2NA is added (the volume is determined according to the volume of the treated waste liquid and is generally 1: 10-100); adjusting the pH value of a water sample to be neutral, and introducing the treated waste liquid into an adsorption/filtration module; 3) the adsorption/filtration module consists of two parts of active carbon and PP cotton, can remove part of complex produced in the chemical treatment module and solid impurities in a water sample, and guides the treated waste liquid into the clear liquid temporary storage module as clear liquid; 4) the clear liquid temporary storage module triggers the second water quality analyzer to measure the clear liquid, and whether a measured value meets the measurement requirement is detected. If the waste liquid is qualified, the waste liquid is used as the water for measurement of a second water quality analyzer, and if the waste liquid is not qualified, the waste liquid is collected as the waste liquid and is processed by a professional organization or the waste liquid is processed again after the process is optimized.
Example 2:
the first water quality analyzer is a permanganate index analyzer based on the oxidation-titration principle of acidic potassium permanganate; the second water quality analyzer is an ammonia nitrogen on-line analyzer based on a Nashin reagent colorimetric method measuring principle, and a field water sample is complex. The fact that the water sample is relatively complex means that: the water sample contains more pollutants, the second water quality analyzer has higher content of measured parameter substances (the content of ammonia nitrogen in the example is higher), and the water sample may originally contain interfering substances which influence the second water quality analyzer.
The water requirement of the ammonia nitrogen online analyzer is as follows: the water-saving and purifying device does not contain ammonia nitrogen substances and impurities which can interfere the measurement of the principle analyzer, the aqueous solution is neutral, the turbidity of the water does not influence the measurement (namely, the incident light does not generate large scattering due to the turbidity of the water, for example, the requirement of the example is not higher than 1 NTU), the water does not absorb in the wavelength range of 410nm-425nm, and the like. The waste liquid of the permanganate index analyzer mainly comprises the following components: (a) rinsing the waste liquid: rinsing raw water of a pipeline system of the water quality analyzer; (b) and (3) measuring waste liquid: chemical substances contained in raw water and chemical substances obtained after reaction of potassium permanganate, sulfuric acid and sodium oxalate added in measurement of an analyzer. The ion composition mainly comprises sodium ions, manganese ions, sulfate ions and the like; (c) cleaning waste liquid: the method is mainly used for measuring the minimum concentration of substances contained in the waste liquid (namely, a small amount of the waste liquid is remained on the pipe wall after being discharged, and the content of the waste liquid is low because the residual is removed by cleaning through an analyzer and enters the cleaning waste liquid).
Combine second water quality analyzer water requirement, get first water quality analyzer washing waste liquid and handle, waste liquid cyclic utilization system mainly is waste liquid module of keeping in, chemical treatment module, absorption/filtration module and clear liquid module of keeping in and constitutes. The specific treatment method comprises the following steps: 1) the waste liquid temporary storage module selectively collects the cleaning waste liquid of the first water quality analyzer; and temporarily store the cleaning waste liquid, and when the volume of the waste liquid reaches a preset volume, the waste liquid is guided into the chemical treatment module. 2) In the chemical treatment module, a certain volume of oxalic acid-zinc sulfate-sodium hydroxide coprecipitation reagent. (the volume is determined according to the volume of the waste liquid, and is usually 1: 10-100); after standing and precipitating, taking supernatant fluid and introducing the supernatant fluid into an adsorption/filtration module; 3) the adsorption/filtration module consists of two parts of zeolite and PP cotton, and can remove part of precipitate in the chemical treatment module and solid impurities in a water sample, so that the turbidity of water meets the water use requirement. Introducing the treated waste liquid serving as clear liquid into a clear liquid temporary storage module; 4) the clear liquid temporary storage module triggers the second water quality analyzer to measure the clear liquid, and whether a measured value meets the measurement requirement is detected. If the waste liquid is qualified, the waste liquid is used as the measuring water of a second water quality analyzer, and if the waste liquid is not qualified, the waste liquid is collected as the waste liquid and is processed by a professional organization or further processed after the process is optimized.
Example 3:
the first water quality analyzer is an ammonia gas sensitive electrode principle ammonia nitrogen on-line analyzer, the second water quality analyzer is an acidic potassium permanganate oxidation-titration principle permanganate index analyzer, and a water sample is relatively clean and simple. The fact that the water sample is relatively clean means that: the water sample contains less pollutants, and the second water quality analyzer has low content of measured parameter substances (the content of reducing substances and organic substances which can be oxidized by the acidic potassium permanganate is lower in the example), such as a place with better protection for a drinking water source.
The permanganate index analyzer requirements for the measurement water are: contains no reducing substances which can be oxidized by acidic permanganate (or the content of the reducing substances is lower than a certain limit value), is neutral in aqueous solution, contains no impurities which can cause pipeline blockage, and the like. The first water quality analyzer waste liquid mainly comprises: (a) rinsing the waste liquid: rinsing raw water of a pipeline system of the water quality analyzer; (b) and (3) measuring waste liquid: chemical substances contained in raw water and sodium hydroxide added in the measurement of an analyzer. The ion composition mainly comprises sodium ions and hydroxyl ions; (c) cleaning waste liquid: the method is mainly used for measuring the minimum concentration of substances contained in the waste liquid (namely, a small amount of the waste liquid is remained on the pipe wall after being discharged, and the content of the waste liquid is low because the residual is removed by cleaning through an analyzer and enters the cleaning waste liquid).
Combine second water quality analyzer water requirement, get first water quality analyzer and measure waste liquid and wash the waste liquid and handle, waste liquid cyclic utilization system mainly keeps in module, chemical treatment module, absorption/filtration module, reverse osmosis module and the clear liquid module of keeping in for the waste liquid and constitutes. The specific treatment method comprises the following steps: 1) the waste liquid temporary storage module selectively collects the measured waste liquid and the cleaning waste liquid of the first water quality analyzer; and temporarily store the measurement waste liquid and the cleaning waste liquid, and when the volume of the waste liquid reaches a preset volume, the waste liquid is guided into the chemical treatment module. 2) Adding a certain volume of dilute sulfuric acid into a chemical treatment module, adjusting the test solution to be neutral, (wherein the adding volume can be determined by feedback control of a pH meter configured in the chemical treatment module, namely, the adding is stopped after the pH value is adjusted to be neutral), and introducing the treated waste liquid into an adsorption/filtration module; 3) the adsorption/filtration module consists of two parts of zeolite and PP cotton, can remove part of solid impurities and adsorbable interfering substances, and guides the treatment fluid into the reverse osmosis module; 4) the reverse osmosis module further processes the treatment liquid until the water requirement of a second water quality analyzer is met, and then introduces the treated waste liquid into a clear liquid temporary storage module as clear liquid; 5) the clear liquid temporary storage module triggers the second water quality analyzer to measure the clear liquid, and whether a measured value meets the measurement requirement is detected. If the waste liquid is qualified, the waste liquid is used as the measuring water of a second water quality analyzer, and if the waste liquid is not qualified, the waste liquid is collected as the waste liquid and is processed by a professional organization or further processed after the process is optimized.
The method and the system of the invention collect the waste liquid of the first water quality analyzer by using the waste liquid temporary storage module, eliminate the interference factor which influences the measurement of the second water quality analyzer in the waste liquid of the first water quality analyzer by using the waste liquid treatment module, temporarily store the treated waste liquid as the clear liquid for the second water quality analyzer by using the waste liquid temporary storage module, and can trigger the second water quality analyzer to measure the clear liquid to judge whether the clear liquid meets the water requirement. The waste liquid treatment module comprises one or more of a chemical treatment module, a filtering module, an adsorption module, an acid-base neutralization module, a reverse osmosis module and an ion exchange module, can carry out diversified treatment on the waste liquid of the first water quality analyzer, and can improve a treatment process as required to meet the water requirement of the second water quality analyzer. The method and the system of the invention recycle the waste liquid generated by the water quality on-line analyzer on the basis of ensuring the measurement, reduce the discharge amount of the waste liquid, and reduce the process difficulty and the operation and maintenance cost.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A water quality analyzer waste liquid recycling method is characterized by comprising the following steps:
based on the water requirement of the second water quality analyzer and the waste liquid characteristics of the first water quality analyzer, treating the waste liquid of the first water quality analyzer, and eliminating interference factors influencing the measurement of the second water quality analyzer in the waste liquid of the first water quality analyzer;
and taking the treated waste liquid as clear liquid for a second water quality analyzer.
2. The method for recycling the waste liquid of the water quality analyzer according to claim 1, wherein the method for eliminating the interference factor comprises: removing interfering substances, adjusting pH value, and adjusting turbidity.
3. The method for recycling waste liquid of a water quality analyzer according to claim 2, wherein the method for removing the interfering substance comprises: and performing at least one of chemical treatment, filtration treatment, adsorption treatment, reverse osmosis treatment and ion exchange treatment on the waste liquid of the first water quality analyzer.
4. The method for recycling the waste liquid of the water quality analyzer according to claim 2, wherein the method for adjusting the pH value comprises: and carrying out acid-base neutralization treatment on the waste liquid of the first water quality analyzer.
5. The method for recycling the waste liquid of the water quality analyzer according to claim 2, wherein the method for adjusting the turbidity comprises the following steps: and performing at least one of filtration treatment, adsorption treatment and reverse osmosis treatment on the waste liquid of the first water quality analyzer.
6. The method of recycling the waste liquid of the water quality analyzer according to any one of claims 1 to 5, wherein the waste liquid comprises: at least one of a rinsing waste liquid, a measuring waste liquid, and a cleaning waste liquid of the first water quality analyzer.
7. The method for recycling waste liquid of a water quality analyzer according to any one of claims 1 to 5, further comprising, before the treated waste liquid is used as a clear liquid for a second water quality analyzer:
detecting the treated waste liquid;
and if the detection result shows that the treated waste liquid does not meet the water use requirement of the second water quality analyzer, the treated waste liquid is sent out for treatment, or the treatment process is optimized and the treated waste liquid is treated according to the optimized treatment process.
8. A waste liquid recycling system of a water quality analyzer is characterized by comprising a waste liquid temporary storage module, a waste liquid treatment module and a clear liquid collection module which are sequentially communicated, wherein the waste liquid temporary storage module is externally connected with a first water quality analyzer, the clear liquid collection module is externally connected with a second water quality analyzer, and the waste liquid temporary storage module is used for collecting waste liquid of the first water quality analyzer;
the waste liquid treatment module is used for treating the waste liquid of the first water quality analyzer based on the water requirement of the second water quality analyzer and the waste liquid characteristics of the first water quality analyzer, and eliminating interference factors which influence the measurement of the second water quality analyzer in the waste liquid of the first water quality analyzer;
the clear liquid collection module is used for triggering the second water quality analyzer to detect the processed waste liquid or/and using the processed waste liquid as clear liquid for the second water quality analyzer.
9. The water quality analyzer waste liquid recycling system according to claim 8, wherein the waste liquid treatment module comprises at least any one of a chemical treatment module, a filtration module, and an adsorption module which are communicated with each other;
the chemical treatment module is used for carrying out chemical treatment on the waste liquid of the first water quality analyzer;
the filtering module is used for filtering the waste liquid of the first water quality analyzer;
the adsorption module is used for adsorbing waste liquid of the first water quality analyzer.
10. The water quality analyzer waste liquid recycling system according to claim 9, wherein the waste liquid treatment module further comprises at least any one of an acid-base neutralization module, a reverse osmosis module, and an ion exchange module, which are communicated with each other;
the acid-base neutralization module is used for carrying out acid-base neutralization treatment on the waste liquid of the first water quality analyzer;
the reverse osmosis module is used for performing reverse osmosis treatment on the waste liquid of the first water quality analyzer;
the ion exchange module is used for carrying out ion exchange treatment on the waste liquid of the first water quality analyzer.
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