CN117147274A - Multi-mode water sample concentration system and concentration method thereof - Google Patents
Multi-mode water sample concentration system and concentration method thereof Download PDFInfo
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- CN117147274A CN117147274A CN202311430461.8A CN202311430461A CN117147274A CN 117147274 A CN117147274 A CN 117147274A CN 202311430461 A CN202311430461 A CN 202311430461A CN 117147274 A CN117147274 A CN 117147274A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 386
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 137
- 239000011550 stock solution Substances 0.000 claims description 43
- 239000008213 purified water Substances 0.000 claims description 40
- 239000012141 concentrate Substances 0.000 claims description 16
- 239000000243 solution Substances 0.000 claims description 15
- 238000012544 monitoring process Methods 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 9
- 230000001351 cycling effect Effects 0.000 claims description 9
- 239000012528 membrane Substances 0.000 claims description 7
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- 238000012360 testing method Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 7
- 239000002699 waste material Substances 0.000 description 4
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- 230000035699 permeability Effects 0.000 description 3
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- 230000009191 jumping Effects 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/14—Conveying liquids or viscous products by pumping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
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- 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
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Abstract
The application relates to the field of water sample concentration, in particular to a multi-mode water sample concentration system and a concentration method thereof. According to the multimode water sample concentration system provided by the application, the controller unit is utilized to send out an electric control instruction to each component in the water sample concentration unit; so that each component executes instruction arrangement according to the electric control instruction to perform multi-mode concentration and concentration method conversion between multi-mode concentration, wherein the multi-mode concentration function comprises a constant-speed concentration mode, a constant-volume concentration mode and a constant-volume concentration mode. The water sample concentration mode that realizes same water sample concentrator can realize multiple mode, and the device cost is lower, and the operation is simpler, and concentration method is diversified, and a plurality of concentration methods can also carry out the result check each other, have further improved the accuracy of concentrated result. The water sample concentration requirement in the water quality detection process is further solved while the multi-concentration actual water sample is provided for the actual water sample comparison test.
Description
Technical Field
The application relates to the field of water sample concentration, in particular to a multi-mode water sample concentration system and a concentration method thereof.
Background
The water quality safety problem is always the center of gravity of social concern, in the water sample detection process, the concentration of the water sample is an urgent need in the current water quality detection process, and through concentration, a multi-concentration actual water sample can be provided for an actual water sample comparison test, and a calibration water sample can also be provided for the existing detection equipment.
However, in the comparison of the actual water samples, the actual water samples have the conditions of small transformation range and single magnitude. Under the condition of single magnitude, only the accuracy of the instrument in the single magnitude can be checked, the accuracy of the instrument in the condition of other magnitudes can not be checked, and the linearity of the instrument in the condition of a water sample can not be checked. In addition, the existing concentrating device or concentrating equipment can only realize one concentrating method corresponding to the device or equipment, when the concentrating method is changed to verify the obtained concentrating result, the cost is too high, the accuracy cannot be effectively guaranteed, meanwhile, different operators have different concentrating habits, more adaptive concentrating functions are selected according to the concentrating habits of the operators, the investment of extra labor cost for users is not needed again, and the overall concentrating cost is reduced.
In summary, the technical problem faced in the current water quality detection field is how to concentrate the water sample, so as to provide a multi-concentration actual water sample for the actual water sample comparison test and the actual water sample calibration, and further solve the water sample concentration requirement in the water quality detection process.
Disclosure of Invention
In view of the above, the present application provides a water sample concentration system and a concentration method thereof, which aims to solve all the above-mentioned problems.
In order to solve the technical problems, the technical scheme of the application is to provide a multi-mode water sample concentration system, which comprises: the water sample concentration unit comprises a raw liquid pool, a concentration pool and a pure water pool which are used for storing water, a permeable membrane used for filtering the water sample, a valve group used for switching on and off a water sample pipeline and a water pump, and all components of the water sample concentration unit are electrically controlled through the controller unit, so that the water sample concentration unit has a multi-mode concentration function comprising a constant-speed concentration mode, a constant-volume concentration mode and a quantitative concentration mode; the device comprises a raw water tank, a concentration tank, a pure water tank, a concentration tank and a water purifying tank, wherein the raw water tank is used for storing a sample water sample, the concentration tank is used for storing a concentrated water sample, and the pure water tank is used for storing pure water.
As an implementation mode, the raw liquid pool, the concentration pool and the pure water pool are all connected with liquid level meters corresponding to the raw liquid pool, the concentration pool and the pure water pool, and the liquid level meters are respectively used for detecting the volumes of water samples stored in the raw liquid pool, the concentration pool and the pure water pool in real time.
As an implementation mode, the raw liquid pool is also respectively connected with a first water quality sensor, the concentration pool is also connected with a second water quality sensor, and the first water quality sensor and the second water quality sensor are respectively used for detecting water samples stored in the raw liquid pool and the concentration pool.
As an implementation mode, the device further comprises a first flowmeter and a second flowmeter, wherein the first flowmeter is arranged between the original liquid pool and the water pump and used for measuring the water sample flow of the original liquid pool, and the second flowmeter is independently arranged at the adjacent position of the concentration pool and used for measuring the water sample flow of the concentration pool.
As an implementation mode, the valve group includes first stoste valve, first concentrate valve, first flowing back valve, intercommunication valve, second stoste valve, second concentrate valve, second flowing back valve and check valve that are used for the water sample pipeline break-make, wherein, first stoste valve with the second stoste valve is located respectively on two water sample pipeline directions of stoste pond, first concentrate valve with the second concentrate valve is located respectively on two water sample pipeline directions of concentrate pond, first flowing back valve is used for the waste liquid emission of stoste pond, the second flowing back valve is used for the waste liquid emission of concentrate pond, the check valve sets up between first stoste valve with first flowmeter.
Correspondingly, the application also provides a multi-mode water sample concentration method which is applied to the multi-mode water sample concentration system described in any one of the above, and comprises the following steps:
the controller unit is utilized to send out an electrical control instruction to each component in the water sample concentration unit;
each component in the water sample concentration unit receives the electrical control instruction and executes instruction arrangement so as to enable the water sample concentration unit to perform multi-mode concentration and concentration method conversion between multi-mode concentration;
the multi-mode concentration function comprises a constant-speed concentration mode, a constant-volume concentration mode and a quantitative concentration mode.
As one embodiment, the concentration method of the constant speed concentration mode includes:
step one: initializing a system after power-on, and injecting a water sample;
step two: opening a first stock solution valve and a second concentration valve, and closing the first concentration valve, the first liquid discharge valve, the intercommunication valve and the second stock solution valve;
step three: adjusting the water outlet ratio k of purified water w And controls the purityWater-to-water ratio k w Is in a preset interval;
step four: setting flow Q, and starting a water pump to start concentration;
step five: when the liquid level in the stock solution tank is not more than the lowest working liquid level after the primary concentration is finished, the water pump is closed, the first stock solution valve, the first liquid discharge valve and the communicating valve are closed, the first liquid discharge valve is opened, and a circulating concentration mode is entered;
step six: presetting all target water quality index concentrations, starting a water pump, and starting circulating concentration;
step seven: monitoring a second water quality sensor, and when the target water quality index concentration reaches a first preset target water quality index concentration, closing the water pump and closing the first concentration valve;
step eight: opening a first liquid discharge valve, monitoring a second flowmeter, calculating the needed volume of concentrated solution, and closing the first liquid discharge valve;
step nine: cycling the step six to the step eight until the target water quality index concentration reaches all the target water quality index concentrations, stopping cycling, and obtaining all the monitoring data of the second flowmeter;
step ten: and opening the first liquid discharge valve, the intercommunication valve and the second liquid discharge valve, checking residual liquid, injecting purified water, and cleaning the system.
As one embodiment, the concentration method of the constant volume concentration mode includes:
step one: calculating the volume of the required original water sample according to the target concentration water sample;
step two: initializing a system, and injecting the original water sample with the same volume obtained by the calculation in the first step;
step three: opening a first stock solution valve, and closing a first concentration valve, an intercommunication valve, a first liquid discharge valve, a second stock solution valve and a second concentration valve;
step four: adjusting the water outlet ratio k of purified water w And controlling the water outlet ratio k of the purified water w Is in a preset interval;
step five: calculating the water quantity of the pure water tank after each time of concentration, and calculating the water quantity of the pure water tank once before concentration;
step six: setting flow Q, and starting a water pump to start concentration;
step seven: when the liquid level in the stock solution tank is not more than the lowest working liquid level after the primary concentration is finished, the water pump is closed, the first stock solution valve, the first liquid discharge valve, the communicating valve and the second stock solution valve are closed, the first concentration valve and the second concentration valve are opened, and a circulating concentration mode is entered;
step eight: starting a water pump, and starting circulating concentration;
step nine: stopping concentrating when the water quantity of the pure water tank is equal to the volume of the required original water sample, taking out the sample, and circulating the first step to the ninth step until the required sample is concentrated;
step ten: and opening the first liquid discharge valve, the intercommunication valve and the second liquid discharge valve, checking residual liquid, injecting purified water, and cleaning the system.
As one embodiment, the concentration method of the quantitative concentration mode includes:
step one: injecting an original water sample, and starting a system;
step two: opening a first stock solution valve and a second concentration valve, and closing the first concentration valve, the first liquid discharge valve, the intercommunication valve and the second stock solution valve;
step three: adjusting purified water outlet ratio k according to preset target water quality index concentration w Controlling the ratio of purified water to be a preset value;
step four: setting flow Q, and starting a water pump to start concentration;
step five: monitoring the liquid level of the concentration tank, stopping the system when the liquid level of the concentration tank is equal to the liquid level of the preset target water quality, and taking out the solution;
step six: cycling the first to fifth steps until the liquid amount of the concentrated solution is equal to the liquid amount of all preset target water quality, and taking out all the solutions, and concentrating the required samples;
step seven: and opening the first liquid discharge valve, the intercommunication valve and the second liquid discharge valve, checking residual liquid, injecting purified water, and cleaning the system.
As an embodiment, the sixth step further includes:
if the maximum purified water outlet ratio is still not greater than the preset value of the purified water outlet ratio after the sample concentration is finished, carrying out original liquid concentration, and specifically:
step A: injecting an original water sample, and starting a system;
and (B) step (B): opening a first stock solution valve and a second stock solution valve, and closing a first concentration valve, a first liquid discharge valve, an intercommunication valve and a second concentration valve;
step C: adjusting the water outlet ratio k of purified water w And controlling the water outlet ratio k of purified water w Is in a preset interval;
step D: setting the concentration and flow Q of original liquid, and starting a water pump to start concentration;
step E: stopping concentrating when the original liquid concentration reaches the target water quality index concentration.
The primary improvement of the application is that: by providing a multi-modal water sample concentration system comprising: the water sample concentration unit comprises a raw liquid pool, a concentration pool and a pure water pool which are used for storing water, a permeable membrane used for filtering the water sample, a valve group used for switching on and off a water sample pipeline and a water pump, and all components of the water sample concentration unit are electrically controlled through the controller unit, so that the water sample concentration unit has a multi-mode concentration function comprising a constant-speed concentration mode, a constant-volume concentration mode and a quantitative concentration mode; the device comprises a raw water tank, a concentration tank, a pure water tank, a concentration tank and a water purifying tank, wherein the raw water tank is used for storing a sample water sample, the concentration tank is used for storing a concentrated water sample, and the pure water tank is used for storing pure water. Compared with the water sample concentration method in the prior art, the water sample concentration method has the advantages that the water sample concentration mode of the same water sample concentration equipment can be realized, the device cost is lower, the operation is simpler, the concentration method is diversified, the result verification can be performed among a plurality of concentration methods, and the accuracy of the concentration result is further improved. In addition, different operators have different concentrating habits, and according to the concentrating habits of different operators, the more adaptive concentrating function is selected, so that the investment of extra labor cost for users is not needed again, and the overall concentrating cost is further reduced. The water sample concentration requirement in the water quality detection process is further solved while the multi-concentration actual water sample is provided for the actual water sample comparison test and the actual water sample calibration.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a multi-modal water sample concentration system according to one embodiment of the present application;
FIG. 2 is a schematic diagram of a water sample concentrating unit according to an embodiment of the present application;
FIG. 3 is a schematic diagram showing steps of a constant-speed concentration method according to an embodiment of the present application;
FIG. 4 is a schematic diagram illustrating steps of a constant volume concentration method according to an embodiment of the present application;
FIG. 5 is a schematic diagram showing steps of a quantitative concentration method according to an embodiment of the present application;
FIG. 6 is a schematic diagram showing the steps of concentrating the original liquid according to an embodiment of the present application.
Reference numerals illustrate: 1-raw liquid pool, 2-concentration pool, 3-pure water pool, 4-raw liquid pool liquid level meter, 5-concentration pool liquid level meter, 6-pure water pool liquid level meter, 7-first water quality sensor, 8-second water quality sensor, 9-first flowmeter, 10-second flowmeter, 11-water pump, 12-permeable membrane, 13-first raw liquid valve, 14-first concentration valve, 15-first drain valve, 16-intercommunication valve, 17-second concentration valve, 18-second raw liquid valve, 19-second drain valve, 20-check valve, 101-controller unit, 102-water sample concentration unit.
Detailed Description
In order that those skilled in the art will better understand the embodiments of the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1, a schematic structural diagram of a multi-mode water sample concentration system according to an embodiment of the present application includes a controller unit 101 and a water sample concentration unit 102 that are electrically connected, and each component of the water sample concentration unit is electrically controlled by the controller unit, so that the water sample concentration unit has a multi-mode concentration function including a constant-speed concentration mode, a constant-volume concentration mode and a constant-volume concentration mode.
Further, as shown in fig. 2, the water sample concentration unit provided by an embodiment of the present application is a schematic structural diagram, and the water sample concentration unit includes a raw water tank 1, a concentration tank 2 and a pure water tank 3 for storing water, a permeable membrane 12 for filtering water samples, a valve set for on-off of water sample pipelines, and a water pump 11, wherein the raw water tank is used for storing sample water samples, the concentration tank is used for storing concentrated water samples, and the pure water tank is used for storing pure water.
Further, the raw liquid pool, the concentration pool and the pure water pool are respectively provided with corresponding liquid level meters, namely a raw liquid pool liquid level meter 4, a concentration pool liquid level meter 5 and a pure water pool liquid level meter 6, and the liquid level meters are used for detecting the volumes of water samples stored in the raw liquid pool, the concentration pool and the pure water pool in real time.
The raw water pond is also respectively connected with a first water quality sensor 7, the concentration pond is also connected with a second water quality sensor 8, and the first water quality sensor and the second water quality sensor are respectively used for detecting water samples stored in the raw water pond and the concentration pond.
Further, the raw liquid pool is connected with a first flowmeter 9, the first flowmeter is arranged between the raw liquid pool and the water pump, the water sample flow of the raw liquid pool is measured, the concentration pool is connected with a second flowmeter 10, and the second flowmeter is independently arranged at the adjacent position of the concentration pool and is used for measuring the water sample flow of the concentration pool.
Further, the valve group comprises a first stock solution valve 13, a first concentration valve 14, a first drain valve 15, an intercommunication valve 16, a second concentration valve 17, a second stock solution valve 18, a second drain valve 19 and a check valve 20 for on-off of pipelines. The first liquid draining valve is used for draining waste liquid of the original liquid pool, the second liquid draining valve is used for draining waste liquid of the concentrated pool, and the check valve is arranged between the first liquid draining valve and the first flowmeter.
The embodiment provides a multi-mode water sample concentration system, which comprises the following components: the water sample concentration unit comprises a raw liquid pool, a concentration pool and a pure water pool which are used for storing water, a permeable membrane used for filtering the water sample, a valve group used for switching on and off a water sample pipeline and a water pump, and all components of the water sample concentration unit are electrically controlled through the controller unit, so that the water sample concentration unit has a multi-mode concentration function comprising a constant-speed concentration mode, a constant-volume concentration mode and a quantitative concentration mode; the device comprises a raw water tank, a concentration tank, a pure water tank, a concentration tank and a water purifying tank, wherein the raw water tank is used for storing a sample water sample, the concentration tank is used for storing a concentrated water sample, and the pure water tank is used for storing pure water. The water sample concentration mode that the same water sample concentration equipment can realize multiple modes is realized, and not only the device cost is lower, and the operation is simpler, but also the concentration method is diversified.
Correspondingly, the application also provides a multi-mode water sample concentration method which is applied to the multi-mode water sample concentration system, and the controller unit is used for sending out an electric control instruction to each component in the water sample concentration unit; each component in the water sample concentration unit receives the electrical control instruction and executes instruction arrangement so as to enable the water sample concentration unit to perform multi-mode concentration and concentration method conversion between multi-mode concentration; the multi-mode concentration function comprises a constant-speed concentration mode, a constant-volume concentration mode and a quantitative concentration mode.
Further, the principle of the constant speed concentration mode is to generate a constant flow rate for concentration, as shown in fig. 3, and the specific concentration method is as follows:
step one: initializing a system after power-on, and injecting a water sample;
step two: opening a first stock solution valve and a second concentration valve, and closing the first concentration valve, the first liquid discharge valve, the intercommunication valve and the second stock solution valve;
step three: adjusting the water outlet ratio k of purified water w And controlling the water outlet ratio k of the purified water w In the preset interval, the preset interval in this embodiment is k w ∈（0,0.5）；
Step four: setting flow Q, calculating the rotating speed N=Q/k of the frequency converter, and starting the water pump to start concentration, wherein k is a flow conversion coefficient;
step five: when the liquid level in the stock solution tank is not more than the lowest working liquid level after the primary concentration is finished (namely, all available original liquid is finished for the primary concentration), the water pump is closed, the first stock solution valve, the first liquid discharge valve and the communicating valve are closed, the first liquid discharge valve is opened, and a circulating concentration mode is entered;
step six: presetting all target water quality index concentrationsTurning on a water pump, and turning on circulation concentration;
step seven: monitoring a second water quality sensor, when the target water quality index concentration reaches a first preset target water quality index concentration (C 2 =C tg1 Wherein C 2 For the target water quality index concentration and C monitored by the second water quality sensor tg1 For the preset target water quality index concentration), the water pump is closed, and the first concentration valve is closed;
step eight: opening the first liquid discharge valve, monitoring the second flowmeter, and adopting a formulaCalculating the required volume of concentrate, closing the first drain valve, wherein +.>Instantaneous flow for the second flowmeter, +.>The transient time and the program scanning time;
step nine: cycling the step six to the step eight until the target water quality index concentration reaches all the target water quality index concentrations, stopping cycling, and obtaining all the monitoring data of the second flowmeter;
if the concentrated solution in the concentration tank is insufficient, repeating the first to fifth steps, and then jumping to the ninth step.
Step ten: and opening the first liquid discharge valve, the intercommunication valve and the second liquid discharge valve, checking residual liquid, injecting purified water, and cleaning the system.
Further, the principle of the constant volume concentration mode is that the total index content is determined, and after quantitative purified water is removed, a water sample with the concentration required by quantification is obtained, as shown in fig. 4, and the specific concentration method is as follows:
step one: calculating the volume of the required original water sample according to the target concentration water sample;
the original water sample volume required for non-PH concentration is:wherein->For redundancy factor, default 1.5, < > is taken>Default to 0.0003 for dynamic permeability coefficient of the system, and can be adjusted according to the selected material,Is the original water sample concentration>Residual water sample, C for system operation tgn Is the concentration and V of the target water sample tgn Is the target water sample volume.
The original water sample volume required for concentration of PH is:、wherein->Taking 1.5 as a redundancy coefficient by default; />Is the dynamic permeability coefficient of the system; />The PH value of the original water sample is obtained; />For the pH value of the target concentrated water sample>Residual water sample for system operation.
Dynamic osmotic coefficient of the above systemBy the formula->Calculated, wherein->Real-time flow for RO devices; />Is the permeable membrane area; />The dynamic permeability coefficient is determined by the materials selected.
Step two: initializing a system, and injecting the original water sample with the same volume obtained by the calculation in the first step;
step three: opening a first stock solution valve, and closing a first concentration valve, an intercommunication valve, a first liquid discharge valve, a second stock solution valve and a second concentration valve;
step four: regulating purityWater-to-water ratio k w And controlling the water outlet ratio k of the purified water w In the preset interval, the preset interval in this embodiment is k w ∈（0,0.5）；
Step five: calculating the water quantity of the pure water tank after each concentration, and calculating the water quantity of the pure water tank once before concentration, wherein a formula is adoptedWherein->For the volume of the liquid level at the end of the concentration, the formula +.>Calculating purified water volume, wherein->Purified water amount of pure water pool, < > is given>Is the diameter of the pure water tank>The current liquid level of the pure water tank;
step six: setting flow Q, calculating the rotating speed N=Q/k of the frequency converter, and starting a water pump to start concentration;
step seven: when the liquid level in the stock solution tank is not more than the lowest working liquid level after the primary concentration is finished, the water pump is closed, the first stock solution valve, the first liquid discharge valve, the communicating valve and the second stock solution valve are closed, the first concentration valve and the second concentration valve are opened, and a circulating concentration mode is entered;
step eight: starting a water pump, and starting circulating concentration;
step nine: stopping concentrating when the water quantity of the pure water tank is equal to the volume of the required original water sample, taking out the sample, and circulating the first step to the ninth step until the required sample is concentrated;
step ten: and opening the first liquid discharge valve, the intercommunication valve and the second liquid discharge valve, checking residual liquid, injecting purified water, and cleaning the system.
Further, the principle of the quantitative concentration mode is that the target concentrated solution with smaller water concentration is concentrated, and concentrated in place at one time, as shown in fig. 5, the specific concentration method is as follows:
step one: injecting an original water sample, and starting a system;
step two: opening a first stock solution valve and a second concentration valve, and closing the first concentration valve, the first liquid discharge valve, the intercommunication valve and the second stock solution valve;
step three: according to the preset target water quality index concentrationAdjusting the water outlet ratio k of purified water w And controlling the purified water outlet ratio to be a preset value, the embodiment takes +.>；
Step four: setting flow Q, calculating the rotating speed N=Q/k of the frequency converter, and starting a water pump to start concentration;
step five: monitoring the liquid level of the concentration tank, stopping the system when the liquid level of the concentration tank is equal to the liquid level of the preset target water quality, and taking out the solution;
step six: cycling the first to fifth steps until the liquid amount of the concentrated solution is equal to the liquid amount of all preset target water quality, and taking out all the solutions, and concentrating the required samples;
step seven: and opening the first liquid discharge valve, the intercommunication valve and the second liquid discharge valve, checking residual liquid, injecting purified water, and cleaning the system.
Further, if the sample concentration is completed, the maximum purified water outlet ratio is still not greater than the preset value of the purified water outlet ratio, namelyThe original liquid is concentrated as shown in fig. 6, specifically:
step A: injecting an original water sample, and starting a system;
and (B) step (B): opening a first stock solution valve and a second stock solution valve, and closing a first concentration valve, a first liquid discharge valve, an intercommunication valve and a second concentration valve;
step C: adjusting the water outlet ratio k of purified water w And controlling the water outlet ratio k of purified water w In the preset interval of time, the device is in the preset interval,；
step D: setting the concentration and flow Q of original liquid, calculating the rotating speed N=Q/k of a frequency converter, and starting a water pump to start concentration;
step E: stopping concentrating when the original liquid concentration reaches the target water quality index concentration.
The application provides a multi-mode water sample concentration method, which utilizes a controller unit to send out an electric control instruction to each component in a water sample concentration unit; each component in the water sample concentration unit receives the electrical control instruction and executes instruction arrangement so as to enable the water sample concentration unit to perform multi-mode concentration and concentration method conversion between multi-mode concentration; the multi-mode concentration function comprises a constant-speed concentration mode, a constant-volume concentration mode and a quantitative concentration mode. Compared with the water sample concentration method in the prior art, the concentration method is diversified, and a plurality of concentration methods can be mutually used for checking results, so that the accuracy of the concentration result is further improved. In addition, different operators have different concentrating habits, and according to the concentrating habits of different operators, the more adaptive concentrating function is selected, so that the investment of extra labor cost for users is not needed again, and the overall concentrating cost is further reduced. The water sample concentration requirement in the water quality detection process is further solved while the multi-concentration actual water sample is provided for the actual water sample comparison test.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing is merely a preferred embodiment of the present application, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the application, and the scope of the application should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the application, and such modifications and adaptations are intended to be comprehended within the scope of the application.
Claims (10)
1. A multi-modal water sample concentration system comprising: the water sample concentration unit comprises a raw liquid pool, a concentration pool and a pure water pool which are used for storing water, a permeable membrane used for filtering the water sample, a valve group used for switching on and off a water sample pipeline and a water pump, and all components of the water sample concentration unit are electrically controlled through the controller unit, so that the water sample concentration unit has a multi-mode concentration function comprising a constant-speed concentration mode, a constant-volume concentration mode and a quantitative concentration mode; the device comprises a raw water tank, a concentration tank, a pure water tank, a concentration tank and a water purifying tank, wherein the raw water tank is used for storing a sample water sample, the concentration tank is used for storing a concentrated water sample, and the pure water tank is used for storing pure water.
2. The multi-mode water sample concentration system according to claim 1, wherein the raw liquid tank, the concentration tank and the pure water tank are respectively connected with liquid level meters corresponding to the raw liquid tank, the concentration tank and the pure water tank, and the liquid level meters are respectively used for detecting the volumes of water samples stored in the raw liquid tank, the concentration tank and the pure water tank in real time.
3. The multi-modal water sample concentration system of claim 2 wherein the stock solution tank is further connected with a first water quality sensor, and the concentration tank is further connected with a second water quality sensor, the first water quality sensor and the second water quality sensor being used for water sample detection of the water samples stored in the stock solution tank and the concentration tank, respectively.
4. A multi-modal water sample concentration system as claimed in claim 3 further comprising a first flow meter and a second flow meter, said first flow meter being disposed between said source water pond and said water pump for water sample flow metering of said source water pond, said second flow meter being disposed separately in adjacent locations of said concentration pond for water sample flow metering of said concentration pond.
5. The multi-modal water sample concentration system of claim 4 wherein said valve set includes a first concentrate valve, a first drain valve, an intercommunication valve, a second concentrate valve, a second drain valve and a check valve for on-off of water sample lines, wherein said first concentrate valve and said second concentrate valve are disposed in two water sample line directions of said concentrate tank, said first drain valve is for drain of said concentrate tank, said second drain valve is for drain of said concentrate tank, and said check valve is disposed between said first concentrate valve and said first flow meter.
6. A method of multi-modal water sample concentration for use in a multi-modal water sample concentration system as claimed in any one of claims 1 to 5 comprising:
the controller unit is utilized to send out an electrical control instruction to each component in the water sample concentration unit;
each component in the water sample concentration unit receives the electrical control instruction and executes instruction arrangement so as to enable the water sample concentration unit to perform multi-mode concentration and concentration method conversion between multi-mode concentration;
the multi-mode concentration function comprises a constant-speed concentration mode, a constant-volume concentration mode and a quantitative concentration mode.
7. The multi-modal water sample concentration method of claim 6 wherein said constant speed concentration mode concentration method comprises:
step one: initializing a system after power-on, and injecting a water sample;
step two: opening a first stock solution valve and a second concentration valve, and closing the first concentration valve, the first liquid discharge valve, the intercommunication valve and the second stock solution valve;
step three: adjusting the water outlet ratio k of purified water w And controlling the water outlet ratio k of the purified water w Is in a preset interval;
step four: setting flow Q, and starting a water pump to start concentration;
step five: when the liquid level in the stock solution tank is not more than the lowest working liquid level after the primary concentration is finished, the water pump is closed, the first stock solution valve, the first liquid discharge valve and the communicating valve are closed, the first liquid discharge valve is opened, and a circulating concentration mode is entered;
step six: presetting all target water quality index concentrations, starting a water pump, and starting circulating concentration;
step seven: monitoring a second water quality sensor, and when the target water quality index concentration reaches a first preset target water quality index concentration, closing the water pump and closing the first concentration valve;
step eight: opening a first liquid discharge valve, monitoring a second flowmeter, calculating the needed volume of concentrated solution, and closing the first liquid discharge valve;
step nine: cycling the step six to the step eight until the target water quality index concentration reaches all the target water quality index concentrations, stopping cycling, and obtaining all the monitoring data of the second flowmeter;
step ten: and opening the first liquid discharge valve, the intercommunication valve and the second liquid discharge valve, checking residual liquid, injecting purified water, and cleaning the system.
8. The multi-modal water sample concentration method as claimed in claim 6 wherein said constant volume concentration mode concentration method comprises:
step one: calculating the volume of the required original water sample according to the target concentration water sample;
step two: initializing a system, and injecting the original water sample with the same volume obtained by the calculation in the first step;
step three: opening a first stock solution valve, and closing a first concentration valve, an intercommunication valve, a first liquid discharge valve, a second stock solution valve and a second concentration valve;
step four: adjusting the water outlet ratio k of purified water w And controlling the water outlet ratio k of the purified water w Is in a preset interval;
step five: calculating the water quantity of the pure water tank after each time of concentration, and calculating the water quantity of the pure water tank once before concentration;
step six: setting flow Q, and starting a water pump to start concentration;
step seven: when the liquid level in the stock solution tank is not more than the lowest working liquid level after the primary concentration is finished, the water pump is closed, the first stock solution valve, the first liquid discharge valve, the communicating valve and the second stock solution valve are closed, the first concentration valve and the second concentration valve are opened, and a circulating concentration mode is entered;
step eight: starting a water pump, and starting circulating concentration;
step nine: stopping concentrating when the water quantity of the pure water tank is equal to the volume of the required original water sample, taking out the sample, and circulating the first step to the ninth step until the required sample is concentrated;
step ten: and opening the first liquid discharge valve, the intercommunication valve and the second liquid discharge valve, checking residual liquid, injecting purified water, and cleaning the system.
9. The multi-modal water sample concentration method of claim 6 wherein said quantitative concentration mode concentration method comprises:
step one: injecting an original water sample, and starting a system;
step two: opening a first stock solution valve and a second concentration valve, and closing the first concentration valve, the first liquid discharge valve, the intercommunication valve and the second stock solution valve;
step three: adjusting purified water outlet ratio k according to preset target water quality index concentration w And controlling the purified water outlet ratio to be presetA value;
step four: setting flow Q, and starting a water pump to start concentration;
step five: monitoring the liquid level of the concentration tank, stopping the system when the liquid level of the concentration tank is equal to the liquid level of the preset target water quality, and taking out the solution;
step six: cycling the first to fifth steps until the liquid amount of the concentrated solution is equal to the liquid amount of all preset target water quality, and taking out all the solutions, and concentrating the required samples;
step seven: and opening the first liquid discharge valve, the intercommunication valve and the second liquid discharge valve, checking residual liquid, injecting purified water, and cleaning the system.
10. A multimodal water sample concentration method according to claim 9 wherein said step six further comprises:
if the maximum purified water outlet ratio is still not greater than the preset value of the purified water outlet ratio after the sample concentration is finished, carrying out original liquid concentration, and specifically:
step A: injecting an original water sample, and starting a system;
and (B) step (B): opening a first stock solution valve and a second stock solution valve, and closing a first concentration valve, a first liquid discharge valve, an intercommunication valve and a second concentration valve;
step C: adjusting the water outlet ratio k of purified water w And controlling the water outlet ratio k of purified water w Is in a preset interval;
step D: setting the concentration and flow Q of original liquid, and starting a water pump to start concentration;
step E: stopping concentrating when the original liquid concentration reaches the target water quality index concentration.
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