阅读说明：本技术 一种多参数水质在线监测集成系统及其监测方法 (Multi-parameter water quality online monitoring integrated system and monitoring method thereof ) 是由 王慎 朱传亮 刘泽明 叶文飞 谢斌 王迅 王智慧 储岳喜 于 2020-07-29 设计创作，主要内容包括：本发明公开了一种多参数水质在线监测集成系统及其监测方法,属于水质在线监测技术领域。本发明的一种多参数水质在线监测集成系统及其监测方法,包括外机,所述外机外部安装有户外机空调,以保持外机内部恒温恒湿的环境；所述外机为由上至下依次为化学反应箱、试剂箱和电极箱,通过在化学反应箱内设置多路阀集成模块,所述多路阀集成模块通过试剂定量环与泵阀集成模块相联通,进而提高检测效率与精度；所述多路阀集成模块分别形成集成化的流路通道,各通道分别通入试剂箱内的各种检测试剂中,通过化学比色法测量在线监测水质中的多种参数,使得集成化成程度较高,并能实现智能自动化测量。(The invention discloses a multi-parameter water quality online monitoring integrated system and a monitoring method thereof, and belongs to the technical field of water quality online monitoring. The invention discloses a multi-parameter water quality online monitoring integrated system and a monitoring method thereof, wherein the system comprises an outdoor unit, wherein an outdoor unit air conditioner is arranged outside the outdoor unit so as to keep a constant-temperature and constant-humidity environment inside the outdoor unit; the external machine comprises a chemical reaction box, a reagent box and an electrode box from top to bottom in sequence, and a multi-way valve integrated module is arranged in the chemical reaction box and is communicated with a pump valve integrated module through a reagent quantifying ring, so that the detection efficiency and precision are improved; the multi-way valve integration module forms integrated flow path channels respectively, each channel is introduced into various detection reagents in the reagent box respectively, and various parameters in the water quality are monitored on line through a chemical colorimetric method, so that the integration degree is higher, and intelligent automatic measurement can be realized.)

1. A multi-parameter water quality on-line monitoring integrated system is characterized in that: the outdoor unit comprises an outdoor unit (1), wherein an outdoor unit air conditioner (14) is arranged outside the outdoor unit (1); the chemical reaction box (11), the reagent box (12) and the electrode box (13) are sequentially arranged in the outdoor unit (1) from top to bottom, the multi-way valve integration module (4) and the digestion integration module (5) are installed in the chemical reaction box (11), and the multi-way valve integration module (4) is communicated with the digestion integration module (5) through an injection pipe (51); the reagent box (12) is filled with a plurality of reagents for detection, and the reagents are introduced into the multi-way valve integrated module (4) through pipelines on the multi-way valve integrated module (4).

2. The multi-parameter water quality on-line monitoring integrated system according to claim 1, characterized in that: the device is characterized by further comprising a pump valve integration module (2), wherein the pump valve integration module (2) is communicated with the multi-way valve integration module (4) through a reagent quantifying ring (3).

3. The multi-parameter water quality on-line monitoring integrated system according to claim 2, characterized in that: the water inlet end of the pump valve integrated module (2) is connected with a pure water pipe (21), and the water outlet end of the pump valve integrated module (2) is connected to the liquid inlet (31) of the reagent quantifying ring (3).

4. The multi-parameter water quality on-line monitoring integrated system according to claim 3, characterized in that: the reagent quantitative ring (3) is of an annular structure, and the internal capacity of the annular structure is a fixed value.

5. The multi-parameter water quality on-line monitoring integrated system according to claim 4, characterized in that: the multi-way valve integrated module (4) is of a double-row multi-pipeline structure, an air pipe (40), an acid solution pipe (41), an alkaline solution pipe (42), an oxidant pipe (43), a reducing agent pipe (44) and a sampling water pipe (47) are respectively arranged on the multi-way valve integrated module, and all the pipelines are controlled by respective electromagnetic valves.

6. The multi-parameter water quality on-line monitoring integrated system according to claim 5, characterized in that: the multi-way valve integrated module (4) is provided with a waste liquid pipe (45) and a cleaning pipe (46) on a double-row multi-pipeline structure.

7. The multi-parameter water quality on-line monitoring integrated system according to claim 6, characterized in that: the digestion integrated module (5) comprises a digestion pipe (53), an upper high-pressure valve (52) is arranged at the upper end of the digestion pipe (53), and a lower high-pressure valve (54) is arranged at the lower end of the digestion pipe (53); an injection pipe (51) is connected to the lower high-pressure valve (54), and one end, far away from the lower high-pressure valve (54), of the injection pipe (51) is connected to the multi-way valve integration module (4).

8. The multi-parameter water quality on-line monitoring integrated system according to claim 7, characterized in that: equidistant pump valve collection moulding piece (2), multiple unit valve collection moulding piece (4) and clear up collection moulding piece (5) of being provided with a plurality of groups respectively in chemical reaction case (11), correspond every group pump valve collection moulding piece (2), multiple unit valve collection moulding piece (4) and clear up collection moulding piece (5), equidistant reagent case (12) of being provided with a plurality of groups, cut off through the baffle in the middle of each group adjacent reagent case (12), just reagent case (12) outside is covered to the separation is external.

9. The multi-parameter water quality on-line monitoring integrated system according to claim 8, characterized in that: a water sample box (6) is fixedly arranged in the electrode box (13), the water sample box (6) comprises a left box body (61) and a right box body (62), and the left box body (61) and the right box body (62) are separated by a filter screen (63); the bottom of the left box body (61) is provided with a main drain valve, and the side surface of the right box body (62) is provided with an overflow port.

10. A monitoring method of a multi-parameter water quality on-line monitoring integrated system is characterized by comprising the following steps:

step one, water taking: starting a self-priming pump, connecting a water inlet pipe of the self-priming pump to a main drain valve arranged at the bottom of the left box body (61), starting the main drain valve, and introducing a water sample into the water sample box (6);

step two, water sample primary filtration: the left box body (61) and the right box body (62) are separated by a filter screen (63), and the mesh number of the filter screen (63) is 100, so that a water sample introduced into the right box body (62) is subjected to preliminary filtration;

step three, measuring the conventional five parameters of the water quality by an electrode method: an electrode probe is inserted into the left box body (61), so that the measured results of the five parameters of water quality such as temperature, pH, dissolved oxygen, conductivity, turbidity and the like are stored and data are uploaded;

step four, measuring the rest parameters of the water quality by a chemical colorimetric method: introducing a water sample in the right box body (62) into a digestion pipe (53) of a digestion integrated module (5), extracting a corresponding detection reagent in a reagent box (12) to the digestion pipe (53) through a multi-way valve integrated module (4), and mixing to complete a digestion reaction process, so that a result of a color reaction process is stored and data is uploaded;

step five, discharging waste liquid after reaction: pumping the waste liquid after the digestion reaction process to a multi-way valve integrated module (4) through an injection pipe (51) and discharging the waste liquid through a waste liquid pipe (45) on the multi-way valve integrated module;

step six, real-time water sample monitoring: and a liquid outlet is formed in the bottom of the right box body (62), after a measuring working condition is finished, all sample water is emptied through the liquid outlet, and the steps from one step to five steps are repeated to perform a new round of monitoring.

Technical Field

The invention relates to the technical field of water quality online monitoring, in particular to a multi-parameter water quality online monitoring integrated system and a monitoring method thereof.

Background

At present, aiming at severe problems of water environment condition deterioration, river and lake function degradation and the like, the online monitoring of the river water quality is scheduled, and compared with the traditional pollution source water quality online monitoring machine type which only measures a single parameter, the online monitoring of the river water quality needs more than nine parameters, and the monitoring indexes cover: monitoring indexes of five parameters (temperature, pH, dissolved oxygen, conductivity and turbidity), permanganate index, Chemical Oxygen Demand (COD), ammonia nitrogen, total phosphorus, total nitrogen, heavy metal, flow and the like of the water quality.

The water quality monitoring is a process of monitoring and measuring the types of pollutants in the water body, the concentrations and the variation trends of various pollutants and evaluating the water quality condition. The national environmental protection administration of 2001 introduces an environmental water quality multi-parameter online monitoring system from France and Italy, 10 test-point surface water quality automatic online monitoring stations are built in China, the conventional five-parameter of water quality and the index detection of Total Organic Carbon (TOC) and Chemical Oxygen Demand (COD) are mainly realized, the price of each set of system is about 170 ten thousand yuan of RMB, the price is high, the inlet water quality monitoring equipment mainly takes large-scale equipment as a main part, a station house type is adopted to pump a water sample to be detected into each testing instrument for detection, the construction cost is high and exceeds the bearing capacity of general use units in China; in addition, water quality monitoring is often used in the import and export basin of outdoor waters, therefore long distance power transmission is required for equipment operation, thereby energy consumption and cost are increased, the existing outdoor water quality monitoring equipment is often powered by storage batteries, the advantage is that the problem of high cost of long distance power supply is solved, but because the storage batteries are repeatedly replaced, the operation and maintenance cost is high, after-sales service is inconvenient, and considerable foreign exchange is consumed every year to purchase spare and accessory parts to maintain normal operation, so that the imported water quality automatic monitoring station is widely popularized and used in China with great difficulty.

At the present stage, more on-line monitoring instruments are used for water quality pollution factors, and the method has various principles. The technical principle, function, equipment constitution, target compound that can achieve measurement, and the like are different. Generally, water pollution factor monitoring technologies are mainly classified into three categories: sensors, spectra, spectrophotometry. The electrochemical method has the advantages that: the analysis speed is fast, the real-time response is realized, and the detection cost is relatively low. The disadvantages are as follows: the stability is insufficient, the method is sensitive to environmental change, frequent calibration is needed, the selectivity is poor, and the types of pollution factors cannot be distinguished. The electrochemical method is commonly used for emergency monitoring and rough estimation of water quality early warning. The method has the advantages that: no need of pretreatment and high response speed. The disadvantages are as follows: the available wave band is limited, the sensitivity is not enough (ppm level), only partial pollution factors are responded, and the anti-interference capability is poor. The gas spectrophotometry has the advantages that: the method can distinguish most water pollution factors, and a monitoring scheme is customized for a certain pollution factor, so that the method has the advantages of comprehensive qualitative and quantitative effects, high sensitivity (ppb level) and the like. The disadvantages are as follows: the method needs to add reagents to pretreat the sample, is complicated and time-consuming in the analysis process, and has higher test cost and response speed which are not as fast as those of the sensor technology and the spectrum technology.

Disclosure of Invention

1. Technical problem to be solved by the invention

The invention provides a multi-parameter water quality on-line monitoring integrated system and a monitoring method thereof, aiming at the problems that one set of system only monitors a single factor and the system occupies a large area in the prior art.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

a multi-parameter water quality online monitoring integrated system comprises an external machine, wherein the external machine comprises a chemical reaction box, a reagent box and an electrode box from top to bottom in sequence, a multi-way valve integrated module and a digestion integrated module are arranged in the chemical reaction box, and the multi-way valve integrated module is communicated with the digestion integrated module through an injection tube; the multi-way valve integrated module is arranged in the chemical reaction box, integrated flow path channels are formed respectively, each channel is introduced into various detection reagents in the reagent box respectively, various detection reagents and a water sample are introduced into the digestion integrated module for reaction, and various parameters in water quality are monitored on line through chemical colorimetry, so that the integration degree is high, and intelligent automatic measurement can be realized.

According to a further technical scheme, the multi-way valve integrated device further comprises a pump valve integrated module, wherein the pump valve integrated module is communicated with the multi-way valve integrated module through a reagent quantitative ring, and the reagent quantitative ring is of an annular structure and comprises a liquid inlet and a liquid outlet; the water inlet end of the pump valve integration module is connected with a pure water pipe, the water outlet end of the pump valve integration module is connected with the liquid inlet of the reagent quantifying ring, the pump valve integration module is of a pump valve integrated structure, only pure water is arranged in the valve cavity of the pump valve integration module, a water sample to be detected or various detection reagents are always positioned in the reagent quantifying ring by controlling the pump valve integration module, and the rest liquid in the reagent quantifying ring is prevented from entering the valve cavity of the pump valve integration module, so that the internal structure of the pump valve integration module is protected from being corroded by the detection liquid, and the service life of the pump valve integration module is prolonged; because only pure water exists in the valve cavity of the pump valve integrated module, the internal structure of the pump valve integrated module does not need to use high-corrosion-resistant materials, and therefore cost is saved.

According to the technical scheme, the reagent quantifying ring is of an annular structure, and the internal capacity of the annular structure is a fixed value, so that the dosage of each detection reagent is accurately controlled, an additional measuring tool is not needed, and the detection efficiency and the detection precision are improved.

Further technical scheme, the multiple unit valve collection moulding piece is double multi-pipeline structure, installs air hose, acid solution pipe, alkaline solution pipe, oxidant pipe, reductant pipe, sample water pipe on it respectively, and each pipeline is through respective solenoid valve control, through controlling the solenoid valve on each pipeline to realize extracting acid solution, alkaline solution, oxidant pipe, reductant pipe, appearance water in proper order and advance in the reagent ration ring, each pipe liquid is discharged through the injection syringe respectively to rethread air hose extraction air mix in the digestion collection moulding piece, in order to play drawing liquid and stirring effect.

According to a further technical scheme, the multi-way valve integrated module is a double-row multi-way structure and is also provided with a waste liquid pipe and a cleaning liquid pipe, and mixed waste liquid after digestion reaction is discharged back to the multi-way valve integrated module through an injection pipe and then is discharged through the waste liquid pipe; and extracting the cleaning liquid through the cleaning pipe so as to clean residual liquid in each pipeline, and discharging the cleaned liquid through the waste liquid pipe.

According to the further technical scheme, the digestion integrated module comprises a digestion pipe, wherein an upper high-pressure valve is arranged at the upper end of the digestion pipe, a lower high-pressure valve is arranged at the lower end of the digestion pipe, and a resistance wire, a temperature sensor and a thermal fuse are arranged in the digestion pipe, so that the mixed liquid in the digestion pipe is heated and pressurized, and is kept warm and pressure to realize digestion reaction, and the thermal fuse can play a role in protection under the condition that the temperature sensor fails; be connected with the injection syringe down on the high-pressure valve, keep away from on the injection syringe the one end of low-pressure valve is connected on the multiple unit valve collection moulding piece to solved the tradition and let in and cleared up the problem that reaction can't be participated in to the remaining liquid body of the inside incomplete section of injection syringe in the reaction module, through clearing up pipe both ends difference direct mount high-pressure valve and lower high-pressure valve, thereby form the collection moulding piece that clears up that integrates, thereby reduce detection error, and improve equipment's integration.

According to the further technical scheme, a plurality of groups of pump valve integrated modules, multi-way valve integrated modules and digestion integrated modules are respectively arranged in the chemical reaction box at equal intervals, a plurality of groups of reagent boxes are arranged at equal intervals corresponding to each group of pump valve integrated modules, multi-way valve integrated modules and digestion integrated modules, and the middle of each adjacent group of reagent boxes is separated by a partition plate; an outdoor machine air conditioner is arranged outside the outdoor machine, and the temperature of each reagent box is automatically adjusted through the outdoor machine air conditioner, so that the detection reagent in each reagent box is ensured to be in a constant-temperature and constant-humidity working environment, the detection result is not influenced by high-temperature deterioration or low-temperature crystallization of the reagent, the requirements of a system and an instrument on the temperature are met, the working stability and the service life of equipment are greatly improved, and the normal heat dissipation of each component can be realized; the outdoor air conditioner in the embodiment is in a small energy-saving mode, can prevent rain and lightning and is suitable for the field; since some detection reagents are easily volatile and deteriorate at normal temperature, an ice cup is usually added in a reagent box to maintain a low-temperature environment, and the reagent box is covered with a cover so as to block the outside.

According to the further technical scheme, a water sample box is fixedly installed in the electrode box and comprises a left box body and a right box body, the left box body and the right box body are separated through a filter screen to play a role of primary filtration, a water sample of the left box body part is mainly used for five-parameter electrode measurement, and the water sample primarily filtered in the right box body is mainly used for a water sample during chemical colorimetric detection; the bottom of the left box body is provided with a main drainage valve which is externally connected with a self-priming pump through a water inlet pipe so as to draw a water sample to be detected in real time by using the water sample box; the overflow mouth has been seted up to right side box side, the overflow mouth is located liquid level height above, after accomplishing a measurement operating mode, can discharge unnecessary appearance water through the overflow mouth to guarantee that quality of water is real-time update, and measured data is real-time update too.

A monitoring method of a multi-parameter water quality on-line monitoring integrated system comprises the following steps:

step one, water taking: starting a self-sucking pump, wherein the self-sucking pump is used for introducing an extracted water sample into the left box body through a water inlet pipe, the water inlet pipe is connected to a main drainage valve arranged at the bottom of the left box body, and the water sample is controlled to be introduced into a water sample box by opening the main drainage valve;

step two, water sample primary filtration: the left box body and the right box body are separated by a filter screen, and the mesh number of the filter screen is 100, so that a water sample introduced into the right box body is preliminarily filtered;

step three, measuring the conventional five parameters of the water quality by an electrode method: inserting an electrode probe into the left box body, so that the measured results of the five parameters of the water quality such as temperature, pH, dissolved oxygen, conductivity, turbidity and the like are stored and data are uploaded;

step four, measuring the rest parameters of the water quality by a chemical colorimetric method: introducing the water sample in the right box body into a digestion pipe of the digestion integration module, extracting corresponding detection reagents in the reagent box to the digestion pipe through the multi-way valve integration module, mixing, and then completing the digestion reaction process, so that the result of the color reaction process is stored and data is uploaded;

step five, discharging waste liquid after reaction: pumping the waste liquid after the digestion reaction process to the multi-way valve integrated module through an injection pipe, and discharging the waste liquid through a waste liquid pipe on the multi-way valve integrated module;

step six, real-time water sample monitoring: and a liquid outlet is formed in the bottom of the right box body, after a measuring working condition is finished, all sample water is emptied through the liquid outlet, and the steps from one step to five steps are repeated to perform a new round of monitoring.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

(1) the invention relates to a multi-parameter water quality on-line monitoring integrated system and a monitoring method thereof.A multi-way valve integrated module is arranged in a chemical reaction box, integrated flow path channels are respectively formed, each channel is respectively introduced into various detection reagents in a reagent box, various detection reagents and a water sample are introduced into a digestion integrated module through an injection pipe for reaction, and then a chemical colorimetric method is used for measuring to monitor various parameters in water quality on line, so that the integrated degree is higher, and intelligent automatic measurement can be realized;

(2) according to the multi-parameter water quality online monitoring integrated system and the monitoring method thereof, the pump valve integrated module is of a pump valve integrated structure, only pure water is in a valve cavity of the pump valve integrated module, a water sample to be detected or various detection reagents are always positioned in the reagent quantifying ring by controlling the pump valve integrated module, and the remaining liquid in the reagent quantifying ring is prevented from entering the valve cavity of the pump valve integrated module, so that the internal structure of the pump valve integrated module is protected from being corroded by the detection liquid, and the service life of the pump valve integrated module is prolonged;

(3) according to the multi-parameter water quality online monitoring integrated system and the monitoring method thereof, the reagent quantifying ring is of an annular structure, and the internal capacity of the annular structure is a fixed value, so that the dosage of each detection reagent is accurately controlled, an additional measuring tool is not needed, and the detection efficiency and precision are improved;

(4) the invention relates to a multi-parameter water quality on-line monitoring integrated system and a monitoring method thereof.A multi-way valve integrated module is of a double-row multi-way structure, each pipeline is controlled by a respective electromagnetic valve, the acidic solution, the alkaline solution, an oxidant pipe, a reducing agent pipe and sample water are sequentially pumped into a reagent quantifying ring by controlling the electromagnetic valve on each pipeline, then air is pumped through an air pipe, and liquid in each pipe is respectively discharged into a digestion integrated module through an injection pipe to be mixed so as to play the roles of liquid pumping and stirring;

(5) according to the multi-parameter water quality online monitoring integrated system and the monitoring method thereof, the lower high-pressure valve is connected with the injection pipe, one end of the injection pipe, which is far away from the lower high-pressure valve, is connected to the multi-way valve integrated module, so that the problem that a residual section of residual liquid in the injection pipe, which is led into the digestion reaction module in the prior art, cannot participate in the digestion reaction is solved, and the high-pressure valve and the lower high-pressure valve are respectively and directly installed at the two ends of the digestion pipe, so that an integrated digestion integrated module is formed, the detection error is reduced, and the integration of equipment is improved;

(6) according to the multi-parameter water quality online monitoring integrated system and the monitoring method thereof, a plurality of groups of reagent boxes are arranged at equal intervals, the middle of each group of adjacent reagent boxes is separated by a partition plate, certain detection reagents are easy to volatilize and deteriorate at normal temperature, so that an ice cup is usually added in each reagent box to maintain a low-temperature environment, and the outside of each reagent box is covered so as to block the outside;

(7) according to the multi-parameter water quality online monitoring integrated system and the monitoring method thereof, the outdoor unit air conditioner is arranged outside the outdoor unit, and the temperature of each reagent box is automatically adjusted through the outdoor unit air conditioner, so that the detection reagent in each reagent box is ensured to be in a constant-temperature and constant-humidity working environment, the detection result is ensured not to be influenced by high-temperature deterioration or low-temperature crystallization, the requirements of the system and instruments on the temperature are met, the working stability and the service life of the equipment are greatly improved, and the normal heat dissipation of each component can be realized; the outdoor air conditioner in the embodiment is in a small energy-saving mode, can prevent rain and lightning and is suitable for the field;

(8) according to the multi-parameter water quality online monitoring integrated system and the monitoring method thereof, a left box body and a right box body of a water sample box are separated through a filter screen to play a role of preliminary filtration, a water sample of the left box body part is mainly used for measuring a five-parameter electrode, and the water sample preliminarily filtered in the right box body is mainly used for a water sample during chemical colorimetric detection; the side surface of the right box body is provided with an overflow port, and sample water higher than the outlet height of the right box body can be discharged through the overflow port, so that the water quality is ensured to be updated in real time, and the measured data is also updated in real time; the liquid outlet has been seted up to right side bottom of the case body, after accomplishing a measurement operating mode, passes through all appearance water evacuation of liquid outlet to guarantee to detect quality of water real-time update, and then can real-time update measured data.

Drawings

FIG. 1 is a schematic structural diagram of an integrated water quality on-line monitoring system according to the present invention;

fig. 2 is a schematic view of a flow path structure of the water quality online monitoring integrated system of the invention.

In the figure: 1-an outdoor unit; 2-pump valve integrated module; 3-reagent quantification ring; 4-a multi-way valve integration module; 5-digestion integration module; 6-water sample tank; 11-a chemical reaction chamber; 12-a reagent kit; 13-an electrode box; 14-outdoor air conditioner; 21-a pure water pipe; 31-liquid inlet; 32-a liquid outlet; 40-air tube; 41-acid solution tube; 42-alkaline solution tube; 43-an oxidant tube; 44-a reductant tube; 45-waste pipe; 46-a cleaning tube; 47-sampling water pipe; 48-standard sample tube; 49-spare tube; 51-syringe; 52-high pressure valve; 53-digestion tube; 54-a lower high pressure valve; 61-left box; 62-right box body; 63-filtering net.

Detailed Description

For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.