CN118050355A - Wastewater discharge detection system and method - Google Patents
Wastewater discharge detection system and method Download PDFInfo
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- CN118050355A CN118050355A CN202410074737.1A CN202410074737A CN118050355A CN 118050355 A CN118050355 A CN 118050355A CN 202410074737 A CN202410074737 A CN 202410074737A CN 118050355 A CN118050355 A CN 118050355A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 110
- 238000001514 detection method Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title abstract description 19
- 238000004062 sedimentation Methods 0.000 claims abstract description 51
- 238000001914 filtration Methods 0.000 claims abstract description 49
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000005070 sampling Methods 0.000 claims abstract description 38
- 239000011550 stock solution Substances 0.000 claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims abstract description 18
- 238000004458 analytical method Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 44
- 238000004140 cleaning Methods 0.000 claims description 24
- 239000000523 sample Substances 0.000 claims description 23
- 239000012488 sample solution Substances 0.000 claims description 20
- 230000009466 transformation Effects 0.000 claims description 14
- 239000002699 waste material Substances 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 9
- 239000003153 chemical reaction reagent Substances 0.000 claims description 5
- 238000004737 colorimetric analysis Methods 0.000 claims description 5
- 239000013049 sediment Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 abstract description 5
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 14
- 229910021529 ammonia Inorganic materials 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 208000032544 Cicatrix Diseases 0.000 description 1
- 238000009621 Solvay process Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 230000037387 scars Effects 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The invention discloses a wastewater discharge detection system and a method, comprising the following steps: the system comprises an intact pretreatment system, an ammonia nitrogen analyzer and a DCS control module; the pretreatment system comprises a sedimentation device, a filtering device and a plurality of switch valves, and the switch valves are connected with the DCS control module; the discharge port of the filtering device is connected with the ammonia nitrogen analyzer; the feed inlet of the sedimentation device is connected with the waste water stock solution discharge port through a first switch valve; the discharge port of the sedimentation device is connected with the feed port of the filtering device through a second switch valve. According to the invention, the original pretreatment system is controlled by the DCS control module to treat the wastewater stock solution, and the ammonia nitrogen analyzer is controlled to analyze the wastewater, so that the phenomenon that the detecting equipment is blocked due to excessive impurities in the wastewater is avoided, real-time continuous automatic sampling and synchronization with analysis are realized, reference data is provided for process refinement operation and subsequent timely treatment of the wastewater, and the index monitoring, energy conservation and consumption reduction of the wastewater are realized.
Description
Technical Field
The invention relates to the field of wastewater discharge monitoring, in particular to a wastewater discharge detection system and method.
Background
A large amount of waste water is generated in the process of producing sodium carbonate by an ammonia-soda process, which is closely related to the normal development of the production activities of companies. Therefore, the real-time monitoring of the environmental protection index of the wastewater becomes an essential link in the soda production process. However, the monitoring and control of various indexes of the wastewater is a complex and very expensive financial and manpower system flow.
In the existing wastewater discharge monitoring method, a sample liquid is generally sent to a chemical analysis chamber in a manual timing sampling mode, and a sampling professional instrument is used for analyzing and obtaining the ammonia nitrogen value of the sample liquid, or ammonia nitrogen indexes are sampled and analyzed in real time at a discharge end through an ammonia nitrogen analyzer and a matched sampling device thereof after wastewater is subjected to a purification procedure. However, because the manual sampling is a discontinuous measurement, the measurement result has hysteresis, the guiding effect on the process production operation is limited, and the measurement after purification can only be used for standard detection before the discharge after the waste liquid purification treatment, the waste liquid is often treated by adding excessive medicines for neutralization, and the energy consumption and the production cost are greatly increased.
Disclosure of Invention
The invention provides a wastewater discharge detection system and a method, which are used for solving the technical problems of strong hysteresis, high energy consumption and high cost of the existing wastewater discharge monitoring.
In order to solve the above technical problems, an embodiment of the present invention provides a wastewater discharge detection system, including: the system comprises an intact pretreatment system, an ammonia nitrogen analyzer and a DCS control module;
The pretreatment system comprises a sedimentation device, a filtering device and a plurality of switch valves, and the switch valves are connected with the DCS control module;
the discharge port of the filtering device is connected with the ammonia nitrogen analyzer; the feed inlet of the sedimentation device is connected with the waste water stock solution discharge port through a first switch valve; the discharge port of the sedimentation device is connected with the feed port of the filtering device through a second switch valve.
According to the invention, the original pretreatment system is automatically controlled by the DCS control module to pretreat the wastewater stock solution, and the ammonia nitrogen analyzer is controlled by the DCS control module to analyze the wastewater, so that the phenomenon that the detecting equipment is blocked by scars due to excessive impurities in the wastewater is avoided, real-time continuous automatic sampling and synchronization with analysis are realized, reference data are provided for process refinement operation and subsequent timely treatment of the wastewater, and various indexes of the wastewater are monitored, energy conservation and consumption reduction are realized.
Further, the sedimentation device comprises a sedimentation barrel and a sensor, wherein the sensor is arranged on a preset liquid level of the sedimentation barrel and is used for measuring the liquid quantity in the sedimentation barrel.
Further, the filter device comprises a filter barrel and a filter layer, and the filter layer is arranged between a feed inlet and a discharge outlet of the filter device.
Further, the wastewater discharge detection system further comprises a cleaning device, wherein the cleaning device is connected with the sedimentation device and the filtering device through a third switch valve, and the cleaning device is used for cleaning the sedimentation device and the filtering device.
Further, the waste water discharge detection system further comprises a waste water collection device, the waste water collection device is connected with the sedimentation device through a fourth switch valve, the waste water collection device is connected with the filtering device through a fifth switch valve, and the waste water collection device is used for collecting waste water discharged by the sedimentation device and the filtering device.
Further, the DCS control module comprises an automatic control circuit;
The automatic control circuit comprises a first branch, a second branch, a third branch and a fourth branch; the first branch is used for controlling alternating current and direct current voltage transformation, the second branch is used for supplying power to the ammonia nitrogen analyzer, and the third branch is used for controlling feeding and discharging of the original pretreatment system; the fourth branch is used for controlling the cleaning and pollution discharge of the original pretreatment system.
Further, the first branch circuit comprises a first switch and an alternating current-direct current transformation circuit; the first switch and the alternating current-direct current transformation circuit are arranged in series;
the alternating current-direct current transformation circuit comprises three relays, and the relays are arranged in parallel.
The invention also provides a wastewater discharge detection method, which is applied to the wastewater discharge detection system and comprises the following steps:
Opening a first switch valve according to a DSC control module and a preset monitoring period to introduce the wastewater stock solution into a feed inlet of the sedimentation device;
Monitoring the wastewater stock solution amount in the sedimentation device, and closing the first switch valve when the wastewater stock solution amount reaches a preset first threshold value;
settling the wastewater stock solution according to a preset settling period to obtain upper layer sample solution and sediment, and opening a second switch valve according to a DSC control module to introduce the upper layer sample solution into a filtering device;
And filtering the upper layer sample liquid according to a preset filtering period, and carrying out sampling analysis on the filtered upper layer sample liquid according to the ammonia nitrogen analyzer and a preset sampling rule, so as to output the sampling result of the wastewater.
Further, the filtered upper layer sample liquid is sampled and analyzed according to the ammonia nitrogen analyzer and a preset sampling rule, and a current wastewater sampling result is output, specifically;
sampling the upper layer sample liquid in the filtering device for multiple times according to the ammonia nitrogen analyzer to obtain a sample solution;
Mixing the sample solution with a first reaction reagent, and obtaining a first gas;
dissolving the first gas according to the first indicator, and obtaining the liquid color of the dissolved first indicator;
And analyzing the liquid of the first indicator according to a colorimetric method, obtaining the ammonia nitrogen content in the upper layer sample liquid, and outputting the sampling result.
Further, after the sample analysis is performed on the filtered upper layer sample solution according to the ammonia nitrogen analyzer and a preset sampling rule, the method further comprises:
opening a third switch valve, a fourth switch valve and a fifth switch valve according to the DSC control module;
And cleaning the filtering device and the sedimentation device according to the cleaning device, and discharging the cleaning waste liquid into the waste liquid collecting device.
Drawings
FIG. 1 is a schematic diagram of a wastewater discharge detection system according to an embodiment of the present invention;
FIG. 2 is a diagram of an automatic control circuit of a wastewater discharge detection system according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method for detecting wastewater discharge according to the present invention;
Fig. 4 is a schematic flow chart of another method for detecting wastewater discharge according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, fig. 1 is a schematic structural diagram of a wastewater discharge detection system according to an embodiment of the present invention, including an intact pretreatment system, an ammonia nitrogen analyzer and a DCS control module;
The pretreatment system comprises a sedimentation device, a filtering device and a plurality of switch valves, and the switch valves are connected with the DCS control module;
the discharge port of the filtering device is connected with the ammonia nitrogen analyzer; the feed inlet of the sedimentation device is connected with the waste water stock solution discharge port through a first switch valve; the discharge port of the sedimentation device is connected with the feed port of the filtering device through a second switch valve.
In the embodiment, the waste water discharge detection system is connected to the evaporation and absorption stations for directly generating a large amount of waste water, so that the ammonia nitrogen content of the waste water which is sent to the purification stations for treatment is monitored in real time according to the waste water discharge detection system, reference data is provided for process refinement operation and subsequent timely treatment of the waste water, and various indexes of the waste water are monitored, energy conservation and consumption reduction are realized.
In this embodiment, the sedimentation device comprises a sedimentation tank and a sensor, the sensor is arranged on a preset liquid level of the sedimentation tank, and the sensor is used for measuring the liquid quantity in the sedimentation tank.
In this embodiment, the sedimentation device is used for sedimentation of impurities in the wastewater stock solution, so as to avoid excessive impurities in the wastewater stock solution, and equipment and instruments are blocked due to direct analysis.
In this embodiment, the filtering device includes a filter vat and a filter layer disposed between a feed inlet and a discharge outlet of the filtering device.
In this embodiment, the wastewater stock solution is introduced into the filtering device after passing through the settling device, and the impurities which are not precipitated are filtered by the filtering layer.
In this embodiment, the wastewater discharge detection system further includes a cleaning device connected to the sedimentation device and the filtration device through a third switching valve, and the cleaning device is used for cleaning the sedimentation device and the filtration device.
In this embodiment, the sedimentation device and the filtering device in the original pretreatment system are cleaned by the cleaning device, so that the accumulation of the residual waste water stock solution is avoided, and the waste water monitoring is influenced.
In this embodiment, the waste water discharge detection system further includes a waste water collection device, the waste water collection device is connected to the sedimentation device through a fourth switch valve, the waste water collection device is connected to the filtration device through a fifth switch valve, and the waste water collection device is used for collecting waste water discharged from the sedimentation device and the filtration device.
In this embodiment, the waste water and the surplus waste water washed by the washing device are collected by the waste water collecting device, so that the subsequent treatment of the waste water and the waste water is facilitated.
Referring to fig. 2, fig. 2 is a schematic diagram of an automatic control circuit of a wastewater discharge detection system according to an embodiment of the invention.
In this embodiment, the DCS control module includes an automatic control circuit;
The automatic control circuit comprises a first branch, a second branch, a third branch and a fourth branch; the first branch is used for controlling alternating current and direct current voltage transformation, the second branch is used for supplying power to the ammonia nitrogen analyzer, and the third branch is used for controlling feeding and discharging of the original pretreatment system; the fourth branch is used for controlling the cleaning and pollution discharge of the original pretreatment system.
In this embodiment, the first branch includes a first switch and an ac-dc voltage transformation circuit; the first switch and the alternating current-direct current transformation circuit are arranged in series;
the alternating current-direct current transformation circuit comprises three relays, and the relays are arranged in parallel.
In this embodiment, the wastewater discharge detection system adopts 220V ac power supply, K1, K2, K3, K4 are switches, and the first branch, the second branch, the third branch, and the fourth branch are respectively controlled, and are respectively an ac-dc voltage transformation circuit, an analyzer power supply socket, a power supply circuit of a feeding control valve and a discharge control valve, and a power supply circuit of a sample outlet valve, a flushing valve, and a blow-down valve. The third branch comprises a first switch valve and a fourth switch valve, wherein the first switch valve is a feeding regulating valve, and the fourth switch valve is a discharging regulating valve; the fourth branch comprises a second switch valve, a third switch valve and a fifth switch valve, wherein the second switch valve is a sample outlet valve, the third switch valve is a flushing valve, and the fifth switch valve is a drain valve.
In the embodiment, the alternating current-direct current voltage transformation circuit supplies power to the relays J1, J2 and J3 and is controlled by a DCS relay switch, so that the DCS control system can automatically control the sample outlet valve, the blow-down valve and the flushing valve. Wherein the feeding regulating valve and the discharging regulating valve are connected with the DCS module, and the switching value is regulated through the DCS control system.
Referring to fig. 3, fig. 3 is a schematic flow chart of a method for detecting wastewater discharge according to the present invention, which includes: steps 301 to 304 are specifically as follows:
Step 301: opening a first switch valve according to a DSC control module and a preset monitoring period to introduce the wastewater stock solution into a feed inlet of the sedimentation device;
Step 302: monitoring the wastewater stock solution amount in the sedimentation device, and closing the first switch valve when the wastewater stock solution amount reaches a preset first threshold value;
Step 303: settling the wastewater stock solution according to a preset settling period to obtain upper layer sample solution and sediment, and opening a second switch valve according to a DSC control module to introduce the upper layer sample solution into a filtering device;
step 304: and filtering the upper layer sample liquid according to a preset filtering period, and carrying out sampling analysis on the filtered upper layer sample liquid according to the ammonia nitrogen analyzer and a preset sampling rule, so as to output the sampling result of the wastewater.
In this embodiment, the sample analysis is performed on the filtered upper layer sample solution according to the ammonia nitrogen analyzer and a preset sampling rule, and a current wastewater sampling result is output, which is specifically;
sampling the upper layer sample liquid in the filtering device for multiple times according to the ammonia nitrogen analyzer to obtain a sample solution;
Mixing the sample solution with a first reaction reagent, and obtaining a first gas;
dissolving the first gas according to the first indicator, and obtaining the liquid color of the dissolved first indicator;
And analyzing the liquid of the first indicator according to a colorimetric method, obtaining the ammonia nitrogen content in the upper layer sample liquid, and outputting the sampling result.
In this embodiment, the sample solution and the first reagent are mixed in the expelling bottle, the first reagent is a liquid-by-liquid, NH 4 ions in the solution are converted into a first gas, the first gas is ammonia (NH 3), the ammonia is released from the sample solution, and then the ammonia is transferred to the measuring cell and redissolved in the first indicator. And (3) comparing the color of the solution with a corresponding color and ammonia nitrogen content comparison table according to a colorimetric method to obtain an analysis result.
In this embodiment, after the sampling analysis is performed on the filtered upper layer sample solution according to the ammonia nitrogen analyzer and a preset sampling rule, the method further includes:
opening a third switch valve, a fourth switch valve and a fifth switch valve according to the DSC control module;
And cleaning the filtering device and the sedimentation device according to the cleaning device, and discharging the cleaning waste liquid into the waste liquid collecting device.
In this embodiment, the DSC control module opens the first switching valve according to a preset monitoring period, so that the waste liquid directly enters the sedimentation device, and closes the first switching valve when the liquid level of the sedimentation barrel of the sedimentation device is higher than the inlet filter pipeline. And obtaining supernatant and sediment according to a preset sedimentation period, wherein the preset sedimentation period is set to 10 minutes by default.
In this embodiment, the second switching valve is opened and the supernatant is poured into the filtration device, which is a three-stage filtration device. And after a preset filtering period, closing the second switch valve, and opening the fourth switch valve to discharge the wastewater and sediment in the sedimentation device.
In this embodiment, the ammonia nitrogen analyzer is controlled to perform multiple sampling, the fifth switch valve and the third switch valve are opened, the filtering device is flushed and discharged according to the cleaning device, and the fourth switch valve is closed, so that the analyzer performs measurement analysis. And closing a fifth switch valve and a third switch valve according to a preset cleaning period to finish the current wastewater monitoring, and entering the next wastewater monitoring period according to the preset monitoring period, wherein the detection period is set to be 20 minutes by default.
Referring to fig. 4, fig. 4 is a schematic flow chart of another method for detecting wastewater discharge according to an embodiment of the invention.
In the embodiment, a sampling tube is led out from the outlet of the evaporation and suction waste-to-fresh liquid pump by the system, and the DCS control system controls the switch of the regulating valve to realize automatic sampling, so that the sample liquid enters the pretreatment device, namely the sedimentation and filtration process. After the original sample is processed by the pretreatment device for a period of time, clear samples meeting detection standards are obtained, the clear samples are sent to the ammonia nitrogen analyzer, and after the ammonia nitrogen analyzer analyzes the clear samples, analysis results are transmitted to the DCS control system platform, and meanwhile, the pretreatment device is cleaned. Wherein the regulating valves are controlled by a DCS control system, and all waste liquid is recycled to the waste liquid barrel.
In this embodiment, please refer to table 1, table 1 is a device parameter table provided in the embodiment of the present invention. The wastewater discharge detection system comprises an original pretreatment system, an ammonia nitrogen analyzer and a DCS control module, wherein parameters of the ammonia nitrogen analyzer and the original pretreatment system are shown in the table.
TABLE 1
As a specific example of the embodiment of the invention, the ammonia nitrogen analyzer is fully automatically completed by adopting a Amtax Compact II ammonia nitrogen analyzer. The sample solution and the first reactant are mixed in an expulsion bottle, the first reactant is a liquid-by-liquid, NH 4 ions in the solution are converted into first gas, the first gas is ammonia (NH 3), the ammonia is released from the sample solution, then the ammonia is transferred into a measuring cell, and the ammonia is redissolved in a first indicator. And obtaining an analysis result according to a factory preset program of the colorimetric method by changing the color of the solution.
According to the invention, ammonia nitrogen content data of the wastewater is obtained from the source, so that a reliable basis is provided for timely production adjustment of the process. The purposes of indirectly controlling the ammonia nitrogen content of the wastewater and reducing the treatment cost of the purification post on the wastewater are achieved. In addition, the pretreatment device is directly used for sampling and analyzing from the site, so that real-time ammonia nitrogen content data of the wastewater can be continuously provided for the process. By combining with the control of a DCS system, the waste liquid passes through the pretreatment device, and can directly obtain the sample liquid meeting the detection standard of the ammonia nitrogen analyzer. In addition, the pretreatment device controls valves and a flow pump at each level through the DCS to realize continuous automatic sampling and discharging, and is in seamless connection with sampling measurement analysis of an analyzer. Thereby realizing real-time monitoring of the ammonia nitrogen content value of the wastewater.
The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present invention, and are not to be construed as limiting the scope of the invention. It should be noted that any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art without departing from the spirit and principles of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. A wastewater discharge detection system, comprising: the system comprises an intact pretreatment system, an ammonia nitrogen analyzer and a DCS control module;
The pretreatment system comprises a sedimentation device, a filtering device and a plurality of switch valves, and the switch valves are connected with the DCS control module;
the discharge port of the filtering device is connected with the ammonia nitrogen analyzer; the feed inlet of the sedimentation device is connected with the waste water stock solution discharge port through a first switch valve; the discharge port of the sedimentation device is connected with the feed port of the filtering device through a second switch valve.
2. The wastewater discharge detection system of claim 1, wherein the sedimentation device comprises a sedimentation tank and a sensor, the sensor being disposed at a predetermined level of the sedimentation tank and the sensor being configured to measure an amount of liquid within the sedimentation tank.
3. The wastewater discharge detection system of claim 1, wherein the filter device comprises a filter bowl and a filter layer disposed between a feed port and a discharge port of the filter device.
4. The wastewater discharge detection system of claim 1, further comprising a cleaning device coupled to the settling device and the filtering device through a third switching valve, the cleaning device configured to clean the settling device and the filtering device.
5. The wastewater discharge detection system of claim 1, further comprising a wastewater collection device coupled to the settling device through a fourth switching valve, the wastewater collection device coupled to the filtration device through a fifth switching valve, and the wastewater collection device configured to collect the wastewater discharged by the settling device and the filtration device.
6. The wastewater discharge detection system of claim 1, wherein the DCS control module includes an automatic control circuit;
The automatic control circuit comprises a first branch, a second branch, a third branch and a fourth branch; the first branch is used for controlling alternating current and direct current voltage transformation, the second branch is used for supplying power to the ammonia nitrogen analyzer, and the third branch is used for controlling feeding and discharging of the original pretreatment system; the fourth branch is used for controlling the cleaning and pollution discharge of the original pretreatment system.
7. The wastewater discharge detection system of claim 6, wherein the first branch comprises a first switch and an ac-dc voltage transformation circuit; the first switch and the alternating current-direct current transformation circuit are arranged in series;
the alternating current-direct current transformation circuit comprises three relays, and the relays are arranged in parallel.
8. A wastewater discharge detection method, characterized by being applied to the wastewater discharge detection system according to any one of claims 1 to 7, comprising:
Opening a first switch valve according to a DSC control module and a preset monitoring period to introduce the wastewater stock solution into a feed inlet of the sedimentation device;
Monitoring the wastewater stock solution amount in the sedimentation device, and closing the first switch valve when the wastewater stock solution amount reaches a preset first threshold value;
settling the wastewater stock solution according to a preset settling period to obtain upper layer sample solution and sediment, and opening a second switch valve according to a DSC control module to introduce the upper layer sample solution into a filtering device;
And filtering the upper layer sample liquid according to a preset filtering period, and carrying out sampling analysis on the filtered upper layer sample liquid according to the ammonia nitrogen analyzer and a preset sampling rule, so as to output the sampling result of the wastewater.
9. The wastewater discharge detection method according to claim 8, wherein the filtered upper layer sample solution is sampled and analyzed according to the ammonia nitrogen analyzer and a preset sampling rule, and a current wastewater sampling result is output, specifically;
sampling the upper layer sample liquid in the filtering device for multiple times according to the ammonia nitrogen analyzer to obtain a sample solution;
Mixing the sample solution with a first reaction reagent, and obtaining a first gas;
dissolving the first gas according to the first indicator, and obtaining the liquid color of the dissolved first indicator;
And analyzing the liquid of the first indicator according to a colorimetric method, obtaining the ammonia nitrogen content in the upper layer sample liquid, and outputting the sampling result.
10. The wastewater discharge detection method of claim 8, further comprising, after the sampling analysis of the filtered supernatant according to the ammonia nitrogen analyzer and a preset sampling rule:
opening a third switch valve, a fourth switch valve and a fifth switch valve according to the DSC control module;
And cleaning the filtering device and the sedimentation device according to the cleaning device, and discharging the cleaning waste liquid into the waste liquid collecting device.
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| CN202410074737.1A CN118050355A (en) | 2024-01-18 | 2024-01-18 | Wastewater discharge detection system and method |
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