CN115876555B - Pretreatment device and method for mineral leaching liquid online monitoring - Google Patents
Pretreatment device and method for mineral leaching liquid online monitoring Download PDFInfo
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Abstract
The invention discloses a pretreatment device for on-line monitoring of mineral leaching liquid, which comprises the following components: the system comprises a sampling and stirring processing subsystem, a negative pressure processing and metering subsystem, a diluting subsystem and a control subsystem; wherein: the sampling and stirring processing subsystem is used for collecting a mineral ground immersion liquid sample and removing air bubbles for the first time to obtain a sample after the first time air bubbles are removed; the negative pressure treatment and metering subsystem is used for carrying out negative pressure treatment on the sample subjected to the first-stage bubble removal, so that the second-stage bubble removal is carried out to obtain a sample subjected to the second-stage bubble removal; and metering and transferring the sample after the second-stage bubble removal; the dilution subsystem is used for diluting the sample subjected to the secondary bubble removal according to a preset proportion; and the control subsystem is used for controlling the operation of the sampling and stirring processing subsystem, the negative pressure processing and metering subsystem and the dilution subsystem and communicating with the outside. Corresponding monitoring, preprocessing methods, electronic devices and computer readable storage media are also disclosed.
Description
Technical Field
The invention belongs to the technical field of liquid pretreatment and on-line monitoring, and particularly relates to a pretreatment device and method for on-line monitoring of mineral leaching liquid.
Background
Currently, in-situ leaching mining (abbreviated as in-situ leaching) methods, which are a mining method for selectively leaching target components by an acidic or alkaline solution by injecting the acidic or alkaline solution as a leaching agent into ores under natural burial conditions to generate compound leaching solutions by extraction reactions, have been used for mining uranium ores and copper ores and mineral substances such as gold, manganese, selenium, rare earth and the like. In the in-situ leaching mining process, because the acidic or alkaline solution is mixed and compressed into the solution to be injected together in the process of injecting the underground mineral deposit, air bubbles in the sample are gradually released in the extracted leaching solution due to the mixed gas during injection, and when target components such as uranium or copper in the leaching solution are monitored online, the slowly released bubbles in the leaching solution can seriously interfere with the subsequent concentration measurement of the target components. Meanwhile, as the leaching solution is strong acid or strong alkali, the acid-base property of the leaching solution can also cause serious interference to the subsequent measurement of the concentration of the target components of the leaching solution.
Based on this, it is necessary to study a suitable method and apparatus for eliminating the molten bubbles in the leachate, and simultaneously, treating the sample into a near neutral sample free of bubbles by diluting the sample, and then performing on-line detection of the concentration of the target component.
Disclosure of Invention
The invention aims to provide a pretreatment device and a pretreatment method for on-line monitoring of mineral leaching liquid, wherein the pretreatment comprises two processes of bubble elimination and proportional dilution; eliminating interference and influence of bubbles in the sample water on the index monitoring process of the leaching liquid and the subsequent target component detection process by two-stage bubble removal of the sample water; and the sample after bubble removal is diluted to be close to neutrality, so that the influence on the index monitoring of the mineral leaching solution is reduced, and the accuracy and the stability of the on-line measurement of the target component in the index monitoring process of the mineral leaching solution are improved.
In one aspect, the present invention provides a pretreatment device for on-line monitoring of mineral leaching solutions, comprising: the system comprises a sampling and stirring processing subsystem, a negative pressure processing and metering subsystem, a diluting subsystem and a control subsystem; wherein:
the sampling and stirring processing subsystem is connected with the negative pressure processing and metering subsystem and is used for collecting a mineral ground immersion liquid sample and carrying out primary bubble removal to obtain a primary bubble removed sample;
the negative pressure treatment and metering subsystem is respectively connected with the sampling and stirring treatment subsystem and the dilution subsystem and is used for carrying out negative pressure treatment on the sample subjected to primary bubble removal, so that secondary bubble removal is carried out to obtain a sample subjected to secondary bubble removal; and metering and transferring the sample after the second-stage bubble removal;
the dilution subsystem is connected with the negative pressure treatment and metering subsystem and is used for diluting the sample subjected to the secondary bubble removal according to a preset proportion; and
the control subsystem is respectively connected with the sampling and stirring processing subsystem, the negative pressure processing and metering subsystem and the dilution subsystem and is used for controlling the operation of the sampling and stirring processing subsystem, the negative pressure processing and metering subsystem and the dilution subsystem and communicating with the outside.
Preferably, the sampling and agitation processing subsystem comprises: the device comprises a needle valve (1), an electromagnetic valve (2), a sample cup (3), a liquid level sensor (4), a water sample overflow pipe (17), a magnetic stirrer b (18), a first stirrer (19) and a manual sampling valve (20); wherein:
the inlet of the needle valve (1) is communicated with the on-site sample water and is used for adjusting the flow and pressure of the sample water entering the pretreatment device;
the inlet of the manual sampling valve (20) is respectively connected with the outlet of the needle valve (1) and the inlet of the electromagnetic valve (2) and is used for manually and temporarily collecting sample water on site and assisting in adjusting the flow and pressure of the sample water entering the pretreatment device;
the outlet of the electromagnetic valve (2) is connected to the bottom of the sample cup (3), and sample water enters the sample cup (3) through the inlet at the bottom of the sample cup (3);
the inner side of the bottom of the sample cup (3) is provided with the first stirrer (19), the outer side of the bottom is provided with the magnetic stirrer b (18), and the water sample overflow pipe (17) is connected to the middle upper position of the sample cup (3);
the liquid level sensor (4) is arranged at the upper end of the sample cup (3) and is used for detecting the liquid level height in the sample cup (3) in real time so as to judge whether sample water is supplied normally or not;
the water sample overflow pipe (17) is arranged at the upper end of the sample cup (3) and overflows sample water entering the sample cup (3);
the first stirrer (19) is driven by the magnetic stirrer b (18) to stir and centrifugally rotate sample water in the sample cup (3) so as to realize primary removal of bubbles in the mineral leaching liquid.
Preferably, the negative pressure treatment and metering subsystem comprises: an inlet solenoid valve (5), an outlet solenoid valve (6) and a high-precision syringe pump (16); wherein:
the inlet pipeline of the inlet electromagnetic valve (5) is inserted into the sample cup (3) and is lower than the interface of the sample cup (3) and the water sample overflow pipe (17);
the pump head interface of the high-precision injection pump (16) is respectively connected with the outlet of the inlet electromagnetic valve (5) and the inlet of the outlet electromagnetic valve (6); the high-precision injection pump (16) is used for pumping the pump head to the limit position under the fully closed state of the inlet electromagnetic valve (5) and the outlet electromagnetic valve (6), a negative pressure area is formed above the liquid level of the sample of the pump head, and the secondary removal of bubbles in the mineral leaching liquid in the sample is realized in a negative pressure mode.
Preferably, the dilution subsystem comprises: the device comprises a pure water pump (7), a sampling pipe (8), a measuring cup (9), a measuring valve a (10), a measuring valve b (11), an overflow pipe (12), a magnetic stirrer a (13), a blow-down valve (14), a pure water barrel (15) and a second stirrer (19'); wherein:
the outlet pipeline of the pure water pump (7), the outlet pipeline of the outlet electromagnetic valve (6) and the sampling pipe (8) are respectively inserted into the upper end of the measuring cup (9) and used for sample injection, dilution, stirring and/or sampling;
the inlet of the overflow pipe (12) is arranged at the upper end of the measuring cup (9) and is used for overflowing the liquid in the measuring cup (9) to protect the pretreatment device;
the inlets of the metering valve a (10) and the metering valve b (11) are arranged at the upper end of the metering cup (9) and are positioned below the overflow pipe (12) and are respectively used for metering pure water with different volumes;
the inlet of the blow-down valve (14) is connected to the bottom end of the metering cup (9) and is used for discharging excessive samples or cleaning waste liquid, and the outlet of the blow-down valve (14) is respectively connected with the outlets of the metering valve a (10), the metering valve b (11) and the overflow pipe (12);
the metering cup (9) is connected with the metering valve a (10) and the metering valve b (11), and the metering valve a (10) and the metering valve b (11) are two metering valves with different heights.
Preferably, the control subsystem comprises a control module and a communication module, wherein the control module is used for carrying out logic processing and driving control on the action of each pump valve; the communication module is used for external communication of the preprocessing equipment and realizes interaction of control instructions and running states.
Preferably, the materials of the parts of the sample cup (3), the measuring cup (9) and the connecting pipeline, which are in direct contact with the sample, are all plastic materials resistant to acid and alkali corrosion; the pump head of the high-precision injection pump (16) is made of quartz glass and polytetrafluoroethylene materials.
The second aspect of the invention provides an on-line monitoring method for leaching liquid based on mineral leaching liquid pretreatment, comprising the following steps:
s1, connecting an inlet of a needle valve (1) with sample water, opening a manual sampling valve (20), and adjusting the opening of the needle valve (1) to adjust the flow of the sample water to a proper range; closing the manual sampling valve (20), opening the electromagnetic valve (2) so as to enable sample water to enter the sample cup (3), discharging redundant sample water through the water sample overflow pipe (17), and detecting the sample water level in the sample cup (3) in real time by the liquid level sensor (4);
s2, closing the electromagnetic valve (2), opening the magnetic stirrer (18), starting the stirrer (19) to rotate, closing the magnetic stirrer (18) after the preset stirring bubble removing time is reached, and stopping the rotation of the stirrer (19);
s3, opening an inlet electromagnetic valve (5) and a high-precision injection pump (16) to extract the sample, wherein the pump head of the high-precision injection pump (16) is full of the sample; closing the inlet electromagnetic valve (5), opening the outlet electromagnetic valve (6), and discharging a certain volume of sample in the pump head by the high-precision injection pump (16); closing an outlet electromagnetic valve (6), and pumping the high-precision injection pump (16) to a limit position, maintaining the state of negative pressure above the liquid level of the sample in the pump head and keeping the state for a preset period of time;
s4, opening an outlet electromagnetic valve (6), draining liquid by a high-precision injection pump (16), and stopping draining liquid by the high-precision injection pump (16) after the sample subjected to negative pressure treatment is drained and fills a pipeline between the outlet electromagnetic valve (6) and a metering cup (9);
s5, starting a pure water pump (7) and a magnetic stirrer a (13), filling the measuring cup (9) with pure water, closing the pure water pump (7) when overflow is carried out through an overflow pipe (12), and opening a blow-down valve (14); after the liquid in the measuring cup (9) is emptied, the blow-down valve (14) is closed; starting the pure water pump (7) again, closing the pure water pump (7) when pure water overflows through the overflow pipe (12), and starting the metering valve a (10) or the metering valve b (11) according to the dilution ratio requirement, and metering the pure water with a specific volume by the metering valve;
s6, closing a metering valve a (10) or a metering valve b (11), discharging a sample with a preset volume into a metering cup (9) by a high-precision injection pump (16), uniformly mixing the sample with pure water, closing a magnetic stirrer a (13), extracting the sample subjected to two-stage bubble removal and dilution pretreatment by a follow-up detection module or equipment through a sampling tube (8), and sending the sample into a follow-up mineral leaching liquid on-line monitoring device for on-line monitoring; and after the on-line monitoring is finished, opening the blow-off valve (14) to discharge the redundant sample, closing the blow-off valve (14) after the discharge, and enabling the pretreatment device to enter the next cycle.
A third aspect of the present invention is to provide a pretreatment method for on-line monitoring of mineral leaching solutions, comprising:
according to the second aspect, the sample water is subjected to two-stage bubble removal and metering, and the metering volume is V 1 ；
According to the second aspect, pure water is metered by opening the metering valve a (10), and the volume is recorded as V a Or the volume is recorded as V after pure water is metered by opening the metering valve b (11) b ；
Calculate V a And V is equal to 1 Or V b And V is equal to 1 The ratio between them was recorded as R as dilution ratio a Or R is b By increasing R a Or R is b To reduce the acid and alkali of the sample and eliminate the influence of the acid and alkali of the sample on the subsequent index measurement.
A fourth aspect of the invention provides an electronic device comprising a processor and a memory, the memory storing a plurality of instructions, the processor being for reading the instructions and performing the method of the second or third aspect.
A fifth aspect of the invention provides a computer readable storage medium storing a plurality of instructions readable by a processor and embodying the method of the second or third aspects of the invention.
The method, the device, the electronic equipment and the computer readable storage medium provided by the invention have the following beneficial technical effects:
(1) The pretreatment comprises two processes of bubble elimination and proportional dilution; eliminating interference and influence of bubbles in the sample water on the index monitoring process of the leaching liquid and the subsequent target component detection process by two-stage bubble removal of the sample water; and the sample after bubble removal is diluted to be close to neutrality, so that the influence on the index monitoring of the mineral leaching solution is reduced, and the accuracy and the stability of the on-line measurement of the target component in the index monitoring process of the mineral leaching solution are improved.
(2) The monitoring process is visualized and controllable, and the automation level of the system is improved.
Drawings
FIG. 1 is a schematic diagram showing the structure of a pretreatment apparatus for on-line monitoring of mineral leaching liquid according to a preferred embodiment of the present invention;
FIG. 2 is a flow chart of an on-line monitoring method for leachate based on pretreatment of mineral leachate, according to a preferred embodiment of the present invention;
fig. 3 is a schematic structural diagram of an embodiment of an electronic device according to the present invention.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, a pretreatment device for on-line monitoring of mineral leaching solution in this embodiment includes: the system comprises a sampling and stirring processing subsystem, a negative pressure processing and metering subsystem, a diluting subsystem and a control subsystem; wherein:
the sampling and stirring processing subsystem is connected with the negative pressure processing and metering subsystem and is used for collecting the mineral ground immersion liquid sample and removing the air bubbles for the first time to obtain a sample after removing the air bubbles for the first time;
the negative pressure treatment and metering subsystem is respectively connected with the sampling and stirring treatment subsystem and the dilution subsystem and is used for carrying out negative pressure treatment on the sample subjected to primary bubble removal, so that the sample subjected to secondary bubble removal is obtained by implementing secondary bubble removal; and metering and transferring the sample after the second-stage bubble removal;
the dilution subsystem is connected with the negative pressure treatment and metering subsystem and is used for diluting the sample subjected to the secondary bubble removal according to a preset proportion; and
the control subsystem is respectively connected with the sampling and stirring processing subsystem, the negative pressure processing and metering subsystem and the dilution subsystem and is used for controlling the operation and communicating with the outside of the sampling and stirring processing subsystem, the negative pressure processing and metering subsystem and the dilution subsystem.
As a preferred embodiment, the sampling and agitation processing subsystem comprises: the device comprises a needle valve 1, an electromagnetic valve 2, a sample cup 3, a liquid level sensor 4, a water sample overflow pipe 17, a magnetic stirrer b18, a first stirrer 19 and a manual sampling valve 20; wherein:
the inlet of the needle valve 1 is communicated with the on-site sample water and is used for adjusting the flow and pressure of the sample water entering the pretreatment device;
the inlet of the manual sampling valve 20 is respectively connected with the outlet of the needle valve 1 and the inlet of the electromagnetic valve 2, and is used for manually and temporarily collecting sample water on site and assisting in adjusting the flow and pressure of the sample water entering the pretreatment device;
the outlet of the electromagnetic valve 2 is connected to the bottom of the sample cup 3, and sample water enters the sample cup 3 through the inlet at the bottom of the sample cup 3;
a first stirrer 19 is arranged on the inner side of the bottom of the sample cup 3, a magnetic stirrer b18 is arranged on the outer side of the bottom, and a water sample overflow pipe 17 is connected to the middle upper position of the sample cup 3;
the liquid level sensor 4 is arranged at the upper end of the sample cup 3 and is used for detecting the liquid level height in the sample cup 3 in real time so as to judge whether the sample water supply is normal or not;
the water sample overflow pipe 17 is arranged at the upper end of the sample cup 3 and overflows sample water entering the sample cup 3, so that the pretreatment device is protected;
the first stirrer 19 is driven by the magnetic stirrer b18 to stir and centrifugally rotate the sample water in the sample cup 3, so that the first-stage removal of bubbles in the mineral leaching liquid is realized.
As a preferred embodiment, the negative pressure treatment and metering subsystem comprises: an inlet solenoid valve 5, an outlet solenoid valve 6, and a high-precision syringe pump 16; wherein:
the inlet pipeline of the inlet electromagnetic valve 5 is inserted into the sample cup 3, and the height of the inlet pipeline is lower than that of the interface between the sample cup 3 and the water sample overflow pipe 17;
the pump head interface of the high-precision injection pump 16 is respectively connected with the outlet of the inlet electromagnetic valve 5 and the inlet of the outlet electromagnetic valve 6; the high-precision injection pump 16 pumps the pump head to the limit position in the fully closed state of the inlet electromagnetic valve 5 and the outlet electromagnetic valve 6, a negative pressure area is formed above the liquid level of the sample of the pump head, and the secondary removal of bubbles in the mineral leaching liquid in the sample is realized in a negative pressure mode.
As a preferred embodiment, the dilution subsystem comprises: the device comprises a pure water pump 7, a sampling pipe 8, a measuring cup 9, a measuring valve a10, a measuring valve b11, an overflow pipe 12, a magnetic stirrer a13, a blow-off valve 14, a pure water barrel 15 and a second stirrer 19'; wherein:
the outlet pipeline of the pure water pump 7, the outlet pipeline of the outlet electromagnetic valve 6 and the sampling pipe 8 are respectively inserted into the upper end of the measuring cup 9 and are used for sample injection, dilution, stirring and/or sampling;
the inlet of the overflow pipe 12 is arranged at the upper end of the measuring cup 9 and is used for overflowing the liquid in the measuring cup 9 to protect the pretreatment device;
the inlets of the metering valve a10 and the metering valve b11 are arranged at the upper end of the metering cup 9 and positioned below the overflow pipe 12 and are respectively used for metering pure water with different volumes;
an inlet of the blow-down valve 14 is connected to the bottom end of the measuring cup 9 for discharging excessive sample or cleaning waste liquid, and an outlet of the blow-down valve 14 is respectively connected with the outlets of the measuring valve a10, the measuring valve b11 and the overflow pipe 12;
the metering cup 9 is connected with the metering valve a10 and the metering valve b11, and the metering valve a10 and the metering valve b11 are two metering valves with different heights so as to avoid the influence of the precision of the high-precision injection pump 16 on the requirements of different dilution ratios.
As a preferred embodiment, the control subsystem comprises a control module and a communication module, wherein the control module is used for carrying out logic processing and driving control on the action of each pump valve; the communication module is used for external communication of the preprocessing equipment and realizing interaction of control instructions and running states.
As a preferred embodiment, the materials of the sample cup 3, the measuring cup 9 and the part of the connecting pipeline which is in direct contact with the sample are all acid and alkali corrosion resistant plastic materials which cannot influence the monitoring index; the pump head of the high-precision injection pump 16 is made of quartz glass and polytetrafluoroethylene materials, and the materials are resistant to acid and alkali corrosion.
Example two
As shown in fig. 2, an on-line monitoring method for leachate based on mineral leachate pretreatment includes:
s1, connecting an inlet of a needle valve 1 with sample water, opening a manual sampling valve 20, and adjusting the opening of the needle valve 1 to adjust the flow of the sample water to a proper range; closing the manual sampling valve 20, opening the electromagnetic valve 2 so as to enable sample water to enter the sample cup 3, discharging redundant sample water through the water sample overflow pipe 17, and detecting the sample water level in the sample cup 3 in real time by the liquid level sensor 4;
s2, closing the electromagnetic valve 2, opening the magnetic stirrer 18, starting rotation of the stirrer 19, and closing the magnetic stirrer 18 to stop rotation of the stirrer 19 after the preset stirring bubble removal time is reached;
s3, opening an inlet electromagnetic valve 5 and a high-precision injection pump 16 to extract the sample, wherein the pump head of the high-precision injection pump 16 is full of the sample; closing the inlet electromagnetic valve 5, opening the outlet electromagnetic valve 6, and discharging a certain volume of sample in the pump head by the high-precision injection pump 16; closing the outlet electromagnetic valve 6, and pumping the high-precision injection pump 16 to the limit position, maintaining the state of negative pressure above the liquid level of the sample in the pump head and keeping the state for a preset period of time;
in this embodiment, the preset time period is generally 30s-60s. Those skilled in the art should know that the preset time length can be adjusted on site according to the elimination effect of the bubbles, which is within the protection scope of the present invention.
S4, opening the outlet electromagnetic valve 6, discharging liquid by the high-precision injection pump 16, and stopping discharging liquid by the high-precision injection pump 16 after the sample subjected to negative pressure treatment is discharged and fills the pipeline between the outlet electromagnetic valve 6 and the measuring cup 9;
s5, starting the pure water pump 7 and the magnetic stirrer a13, filling the measuring cup 9 with pure water, closing the pure water pump 7 when overflow is carried out through the overflow pipe 12, and opening the blow-off valve 14; after the liquid in the measuring cup 9 is emptied, the blow-down valve 14 is closed; the pure water pump 7 is started again, the pure water pump 7 is closed when the pure water overflows through the overflow pipe 12, the metering valve a10 or the metering valve b11 is opened according to the dilution ratio requirement, and the metering valve highly meters the pure water with specific volume;
s6, closing a metering valve a10 or a metering valve b11, discharging a sample with a preset volume into a metering cup 9 by a high-precision injection pump 16, uniformly mixing the sample with pure water, closing a magnetic stirrer a13, extracting the sample subjected to two-stage bubble removal and dilution pretreatment by a follow-up detection module or equipment through a sampling tube 8, and sending the sample into a follow-up mineral leaching liquid on-line monitoring device for on-line monitoring; and after the on-line monitoring is finished, the blow-off valve 14 is opened to discharge the redundant sample, after the discharge, the blow-off valve 14 is closed, and the pretreatment device enters the next cycle.
Example III
A pretreatment method for on-line monitoring of mineral leaching solution, comprising:
according to the second embodiment, two-stage bubble removal and metering are carried out on the sample water, and the metering volume in the metering cup 9 is V 1 ；
Pure water was measured according to example II, and the volume after pure water was measured by opening the measuring valve a10 was recorded as V a Or the volume is recorded as V after pure water is metered by opening the metering valve b11 b ；
Calculate V a And V is equal to 1 Or V b And V is equal to 1 The ratio between them was recorded as R as dilution ratio a Or R is b By increasing R a Or R is b To reduce the acid and alkali of the sample and eliminate the influence of the acid and alkali of the sample on the subsequent index measurement.
In this embodiment, the selection of the metering valve a or the metering valve b is based on:
(1) The two metering valves are different in height, and finally the total volume of the diluted sample provided for the instrument and equipment at the rear end of the sampling tube 8 is different, so that the metering valve can be used for metering pure water according to the required volume of the sample volume for actual analysis and test;
(2) The dilution precision is different, the smaller the volume of the sample water metered by the injection pump is, the worse the precision is, so that when pure water is enough, the combination of the metering valve b11 for the sample water with a large volume for the injection pump is preferentially selected to dilute the sample water;
(3) Conversely, in order to reduce the maintenance and reduce the consumption of pure water on site, the combination of the metering valve a and the sample water with a smaller volume is preferentially adopted to dilute the sample water;
(4) The injection pump 16 is used for carrying out volume metering on the sample water and the metering valve a10 or the metering valve b11 in a flexible matching way so as to realize accurate metering.
Therefore, according to the third embodiment, the pure water is metered by the metering valve a10, so that the on-site pure water consumption can be saved; under the condition of a certain dilution ratio, the metering valve b11 is adopted to meter pure water, so that the dilution ratio error caused by the inherent error of the high-precision metering pump 16 can be reduced, and the detection accuracy of the subsequent sample indexes can be improved.
Example IV
As shown in fig. 3, the present invention further provides an electronic device, which includes a processor 302, and a memory 301, a driver 303, and a communication module 304 connected to the processor 302, where the memory 301 stores a plurality of instructions, and the instructions may be loaded by the processor, and the driver 303 executes and drives a pump valve in a flow path, so that the processor may execute a method as described in the second embodiment or the third embodiment, and the communication module 304 implements communication with an apparatus outside the device, and implements interaction of an action state of the pump valve of the device and modification of a dilution ratio of the device.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (4)
1. An on-line monitoring method for leaching liquid based on mineral leaching liquid pretreatment is realized based on a pretreatment device for on-line monitoring of mineral leaching liquid, which is characterized in that,
the pretreatment device for on-line monitoring of mineral leaching liquid comprises: the system comprises a sampling and stirring processing subsystem, a negative pressure processing and metering subsystem, a diluting subsystem and a control subsystem; wherein:
the sampling and stirring processing subsystem is connected with the negative pressure processing and metering subsystem and is used for collecting a mineral ground immersion liquid sample and carrying out primary bubble removal to obtain a primary bubble removed sample;
the negative pressure treatment and metering subsystem is respectively connected with the sampling and stirring treatment subsystem and the dilution subsystem and is used for carrying out negative pressure treatment on the sample subjected to primary bubble removal, so that secondary bubble removal is carried out to obtain a sample subjected to secondary bubble removal; and metering and transferring the sample after the second-stage bubble removal;
the dilution subsystem is connected with the negative pressure treatment and metering subsystem and is used for diluting the sample subjected to the secondary bubble removal according to a preset proportion; and
the control subsystem is respectively connected with the sampling and stirring processing subsystem, the negative pressure processing and metering subsystem and the dilution subsystem and is used for controlling the operation and externally communicating of the sampling and stirring processing subsystem, the negative pressure processing and metering subsystem and the dilution subsystem;
the sampling and agitation processing subsystem includes: the device comprises a needle valve (1), an electromagnetic valve (2), a sample cup (3), a liquid level sensor (4), a water sample overflow pipe (17), a magnetic stirrer b (18), a first stirrer (19) and a manual sampling valve (20); wherein:
the inlet of the needle valve (1) is communicated with the on-site sample water and is used for adjusting the flow and pressure of the sample water entering the pretreatment device;
the inlet of the manual sampling valve (20) is respectively connected with the outlet of the needle valve (1) and the inlet of the electromagnetic valve (2) and is used for manually and temporarily collecting sample water on site and assisting in adjusting the flow and pressure of the sample water entering the pretreatment device;
the outlet of the electromagnetic valve (2) is connected to the bottom of the sample cup (3), and sample water enters the sample cup (3) through the inlet at the bottom of the sample cup (3);
the inner side of the bottom of the sample cup (3) is provided with the first stirrer (19), the outer side of the bottom is provided with the magnetic stirrer b (18), and the water sample overflow pipe (17) is connected to the middle upper position of the sample cup (3);
the liquid level sensor (4) is arranged at the upper end of the sample cup (3) and is used for detecting the liquid level height in the sample cup (3) in real time so as to judge whether sample water is supplied normally or not;
the water sample overflow pipe (17) is arranged at the upper end of the sample cup (3) and overflows sample water entering the sample cup (3);
the first stirrer (19) is driven by the magnetic stirrer b (18) to stir and centrifugally rotate sample water in the sample cup (3) so as to realize primary removal of bubbles in mineral leaching liquid;
the negative pressure treatment and metering subsystem includes: an inlet solenoid valve (5), an outlet solenoid valve (6) and a high-precision syringe pump (16); wherein:
the inlet pipeline of the inlet electromagnetic valve (5) is inserted into the sample cup (3) and is lower than the interface of the sample cup (3) and the water sample overflow pipe (17);
the pump head interface of the high-precision injection pump (16) is respectively connected with the outlet of the inlet electromagnetic valve (5) and the inlet of the outlet electromagnetic valve (6); the high-precision injection pump (16) pumps the pump head to a limit position in a fully closed state of the inlet electromagnetic valve (5) and the outlet electromagnetic valve (6), a negative pressure area is formed above the liquid level of a pump head sample, and the secondary removal of bubbles in mineral leaching liquid in the sample is realized in a negative pressure mode;
the dilution subsystem includes: the device comprises a pure water pump (7), a sampling pipe (8), a measuring cup (9), a measuring valve a (10), a measuring valve b (11), an overflow pipe (12), a magnetic stirrer a (13), a blow-down valve (14), a pure water barrel (15) and a second stirrer (19'); wherein:
the outlet pipeline of the pure water pump (7), the outlet pipeline of the outlet electromagnetic valve (6) and the sampling pipe (8) are respectively inserted into the upper end of the measuring cup (9) and used for sample injection, dilution, stirring and/or sampling;
the inlet of the overflow pipe (12) is arranged at the upper end of the measuring cup (9) and is used for overflowing the liquid in the measuring cup (9) to protect the pretreatment device;
the inlets of the metering valve a (10) and the metering valve b (11) are arranged at the upper end of the metering cup (9) and are positioned below the overflow pipe (12) and are respectively used for metering pure water with different volumes;
the inlet of the blow-down valve (14) is connected to the bottom end of the metering cup (9) and is used for discharging excessive samples or cleaning waste liquid, and the outlet of the blow-down valve (14) is respectively connected with the outlets of the metering valve a (10), the metering valve b (11) and the overflow pipe (12);
the metering cup (9) is connected with the metering valve a (10) and the metering valve b (11), and the metering valve a (10) and the metering valve b (11) are two metering valves with different heights;
the control subsystem comprises a control module and a communication module, and the control module is used for carrying out logic processing and driving control on the action of each pump valve; the communication module is used for external communication of the preprocessing device and realizing interaction of control instructions and running states;
the material of the parts of the sample cup (3), the measuring cup (9) and the connecting pipeline, which are in direct contact with the sample, is acid and alkali corrosion resistant plastic material; the pump head of the high-precision injection pump (16) is made of quartz glass and polytetrafluoroethylene materials;
the leaching liquid on-line monitoring method based on mineral leaching liquid pretreatment comprises the following steps:
s1, connecting an inlet of a needle valve (1) with sample water, opening a manual sampling valve (20), and adjusting the opening of the needle valve (1) to adjust the flow of the sample water to a proper range; closing the manual sampling valve (20), opening the electromagnetic valve (2) so as to enable sample water to enter the sample cup (3), discharging redundant sample water through the water sample overflow pipe (17), and detecting the sample water level in the sample cup (3) in real time by the liquid level sensor (4);
s2, closing the electromagnetic valve (2), opening the magnetic stirrer b (18), starting the first stirrer (19) to rotate, closing the magnetic stirrer b (18) after the preset stirring bubble removing time is up, and stopping the rotation of the first stirrer (19);
s3, opening an inlet electromagnetic valve (5) and a high-precision injection pump (16) to extract the sample, wherein the pump head of the high-precision injection pump (16) is full of the sample; closing the inlet electromagnetic valve (5), opening the outlet electromagnetic valve (6), and discharging a certain volume of sample in the pump head by the high-precision injection pump (16); closing an outlet electromagnetic valve (6), and pumping the high-precision injection pump (16) to a limit position, maintaining the state of negative pressure above the liquid level of the sample in the pump head and keeping the state for a preset period of time;
s4, opening an outlet electromagnetic valve (6), draining liquid by a high-precision injection pump (16), discharging the sample subjected to negative pressure treatment, and filling a pipeline between the outlet electromagnetic valve (6) and a metering cup (9), wherein the high-precision injection pump (16) stops draining liquid;
s5, starting a pure water pump (7) and a magnetic stirrer a (13), filling the measuring cup (9) with pure water, closing the pure water pump (7) when overflow is carried out through an overflow pipe (12), and opening a blow-down valve (14); after the liquid in the measuring cup (9) is emptied, the blow-down valve (14) is closed; starting the pure water pump (7) again, closing the pure water pump (7) when pure water overflows through the overflow pipe (12), and starting the metering valve a (10) or the metering valve b (11) according to the dilution ratio requirement, and metering the pure water with a specific volume by the metering valve;
s6, closing a metering valve a (10) or a metering valve b (11), discharging a sample with a preset volume into a metering cup (9) by a high-precision injection pump (16), uniformly mixing the sample with pure water, closing a magnetic stirrer a (13), extracting the sample subjected to two-stage bubble removal and dilution pretreatment by a follow-up detection module or equipment through a sampling tube (8), and sending the sample into a follow-up mineral leaching liquid on-line monitoring device for on-line monitoring; and after the on-line monitoring is finished, opening the blow-off valve (14) to discharge the redundant sample, closing the blow-off valve (14) after the discharge, and enabling the pretreatment device to enter the next cycle.
2. A pretreatment method for on-line monitoring of mineral leaching solution, for the on-line monitoring method of leaching solution according to claim 1, comprising:
two-stage bubble removal and metering of sample water are carried out, and the metering volume is V 1 ；
Pure water is measured, and the volume is recorded as V after pure water is measured by opening a measuring valve a (10) a Or the volume is recorded as V after pure water is metered by opening the metering valve b (11) b ；
Calculate V a And V is equal to 1 Or V b And V is equal to 1 The ratio between them was recorded as R as dilution ratio a Or R is b By increasing R a Or R is b To reduce the acid and alkali of the sample and eliminate the influence of the acid and alkali of the sample on the subsequent index measurement.
3. An electronic device comprising a processor and a memory, the memory storing a plurality of instructions, the processor configured to read the instructions and perform the method of any of claims 1-2.
4. A computer readable storage medium storing a plurality of instructions readable by a processor and for performing the method of any one of claims 1-2.
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| KR20060123879A (en) * | 2005-05-30 | 2006-12-05 | 삼성석유화학(주) | Organic carbon measuring pretreatment unit in the waste water treatment |
| CN101936910B (en) * | 2010-08-04 | 2013-02-20 | 聚光科技(杭州)股份有限公司 | Method for analyzing water toxicity |
| CN203688493U (en) * | 2013-12-17 | 2014-07-02 | 中兴仪器（深圳）有限公司 | On-line multi-parameter heavy metal analyzer |
| CN204086149U (en) * | 2014-09-05 | 2015-01-07 | 淄博纳瑞仪器有限公司 | Water soluble acid tester |
| CN107045045A (en) * | 2017-06-21 | 2017-08-15 | 中山市兆普科生物科技研究院有限公司 | A kind of solution concentration on-line measuring device |
| CN109164224B (en) * | 2018-09-29 | 2024-04-30 | 成都凯天电子股份有限公司 | Water sample on-line dilution monitor |
| CN109580321B (en) * | 2018-11-27 | 2021-05-18 | 迪瑞医疗科技股份有限公司 | Liquid path bubble removing device and method |
| CN216560521U (en) * | 2021-03-25 | 2022-05-17 | 北京华科仪科技股份有限公司 | Water sample diluting device for monitoring high-concentration water quality |
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