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High-concentration-difference adjustable-optical-path high-sensitivity absorbance liquid rapid transmission and distribution system and method

A high-concentration, absorbance technology, applied in the direction of material analysis, measuring devices, instruments, etc. through optical means, can solve the problem of long continuous sampling intervals, inability to adapt to changes in the concentration of the target substance to be measured, and the inability to adapt and adjust the target element to be measured and other issues to achieve the effect of improving accuracy

Active Publication Date: 2021-12-03
TONGJI UNIV
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  • Description
  • Claims
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Problems solved by technology

[0003] In view of the above defects, the present invention provides a high-sensitivity absorbance liquid rapid delivery system and method with high concentration difference and adjustable optical path, which solves the problems of long continuous sampling intervals and inability to monitor and analyze traditional offline and existing online monitoring and analysis methods. Continuous sampling and sample arrangement, and cannot adapt to the large concentration changes of the target substances to be measured, and cannot accurately adapt and adjust according to the concentration changes of the target elements to be measured in real time, making it difficult to grasp the raw material quality and reaction of each production unit in the industrial process in real time. Technical issues such as efficiency and material loss

Method used

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  • High-concentration-difference adjustable-optical-path high-sensitivity absorbance liquid rapid transmission and distribution system and method

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Embodiment 1

[0038] Such as figure 1 As shown, the high-sensitivity absorbance liquid rapid delivery system with high concentration difference and adjustable optical path provided in this embodiment includes a PLC control module, a cleaning module, a delivery and distribution module, an air-drying module, and a photosensitive adjustment module;

[0039]The transmission and distribution module forms a closed transmission and distribution circuit with the cleaning module, the photosensitive adjustment module and the air-drying module in turn through the pipeline. The first branch pipeline connected between the cleaning module and the pipeline is provided with a cleaning module electromagnetic switch valve 4, which is used to control the opening and closing of the cleaning module. Closed; the first branch pipeline is connected to the high-purity deionized water generation module 3, the high-purity deionized water generation module 3 includes 3-5 layers of filter columns and a delivery diaphrag...

Embodiment 2

[0049] This embodiment provides a high-sensitivity absorbance liquid rapid delivery method with high concentration difference and adjustable optical path using the system provided in Embodiment 1, including the following steps:

[0050] 1) The PLC control module automatically draws the liquid to be tested into the photosensitive adjustment module through the signal control transmission and distribution module, and determines whether the pipeline is filled with the liquid to be tested through the flow rate of the non-contact flowmeter located at the liquid discharge end of the photosensitive adjustment module;

[0051] 2) Determine the target element to be measured by the target industry, and use the ultraviolet-visible absorption spectroscopy to scan the sample in the photosensitive adjustment module; obtain the Abs value of the characteristic area of ​​the target element to be measured, and feed back the Abs value synchronously To the PLC control module;

[0052] 3) The PLC c...

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Abstract

Based on a high-concentration liquid spectrum direct measurement method, the invention aims at obtaining high absorbance and high sensitivity, and provides a high-concentration-difference optical-path-adjustable high-sensitivity absorbance liquid rapid transmission and distribution system which comprises a photosensitive adjusting module, a PLC control module, a liquid transmission and distribution module and a cleaning and air-drying module. According to the requirements that different species and concentrations are matched with different optical paths, and the different optical paths are matched with different transmission and distribution parameters, the optimal optical path in the photosensitive adjusting module is automatically matched by utilizing absorbance and sensitivity which are continuously and dynamically obtained by a serial optical path, a signal is fed back to the PLC control module in real time, and the transmission and distribution parameters of inlet and outlet liquid of a target optical path are adjusted in real time; interference noise caused by turbulent bubbles is not generated, second-level switching among different optical paths and second-level replacement of liquid samples in the same optical path are achieved through photosensitive adjustment, PLC control and closed-loop control among liquid transmission and distribution, and a foundation is laid for second-level real-time monitoring of pollutants in a high-concentration solution.

Description

technical field [0001] The invention belongs to the technical field of industrial real-time monitoring liquid delivery and distribution methods, and in particular relates to a high-sensitivity absorbance liquid rapid delivery system and method with high concentration difference and adjustable optical path. Background technique [0002] With the development of my country's industry, the country's demand for cleaner production in industrial processes is getting higher and higher. Cleaner production requires the industry to achieve precise control in the production process. Real-time monitoring of pollutants is the basic prerequisite for cleaner production. The reactions that occur in liquid phase systems in industrial processes generally have fast reaction speeds, many types of reactants, and the coexistence of gas-solid-liquid multi-phase states, and the concentration span of different species in the solution is large (some have a difference of up to tens of thousands of times...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01
CPCG01N21/01Y02P90/02
Inventor 段宁降林华徐夫元
Owner TONGJI UNIV
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