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System and method for continuously measuring high-concentration sewage exceeding applicable range of online instrument

A measurement system and high-concentration technology, applied in the direction of testing water, sampling devices, material inspection products, etc., can solve the problem of limiting the intelligent management process of ultra-high-concentration wastewater, conventional instruments are difficult to meet the online measurement requirements, and it is difficult to achieve continuous water quality measurement, etc. problems, to achieve the effect of wide application range, simple structure and easy operation

Inactive Publication Date: 2019-12-31
TONGJI UNIV
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Problems solved by technology

But in fact, many sewage raw water concentrations are very high, such as aquaculture wastewater, slaughter wastewater, landfill leachate, etc., and its COD often exceeds 10,000mg / L. Conventional instruments are difficult to meet the online measurement requirements, thus limiting the intelligence of this type of ultra-high concentration wastewater treatment. Therefore, it is necessary to develop a continuous measurement method for online instruments that can be applied to ultra-high concentration sewage
The invention patent with the publication number CN103868782A discloses a dilution system and a dilution method of an automatic online monitoring system for fishery water quality. Although this method can realize online monitoring of fishery water quality with a relatively high concentration, the system structure is complicated and difficult to implement. Continuous determination of water quality

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  • System and method for continuously measuring high-concentration sewage exceeding applicable range of online instrument
  • System and method for continuously measuring high-concentration sewage exceeding applicable range of online instrument
  • System and method for continuously measuring high-concentration sewage exceeding applicable range of online instrument

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Embodiment 1

[0020] A continuous measurement system for the concentration of high-concentration sewage beyond the applicable range of online instruments, including a dilution water storage tank 1, a dilution water concentration measuring instrument 2, a dilution metering pump 3, a sampling metering pump 4, a pipeline mixer 5, and a mixing water storage tank Tank 6, mixed water concentration measuring instrument 7 and PLC8, the dilution water concentration measuring instrument 2 is used to detect the concentration of dilution water in the dilution water storage tank 1 and send the detected concentration data to PLC8, the dilution metering pump 3 used to set the flow rate to Q 稀 The dilution water is pumped into the pipeline mixer 5, and the sampling metering pump 4 will have a flow rate of Q 样 The high-concentration sewage water sample to be measured is drawn into the pipeline mixer 5, and the maximum flow rate of the sampling metering pump 4 is lower than 1 / 2 of the maximum flow rate of th...

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Abstract

The invention discloses a system and a method for continuously measuring high-concentration sewage exceeding the applicable range of an online instrument, and belongs to the technical field of wastewater treatment. The measuring method comprises the following steps: a dilution metering pump pumps dilution water with a concentration of C<dilution> according to a quantity of flow Q<dilution>; a sampling metering pump pumps a to-be-detected high-concentration sewage sample according to a quantity of flow Q<sample>; the dilution water and the to-be-detected high-concentration sewage sample are hydraulically and uniformly mixed in a pipeline mixer, enter a mixed water storage tank and then overflows out; if the indexes of the water sample measurement of the mixed water storage tank meet the range of a mixed water concentration measuring instrument, a PLC directly and automatically calculates the concentration C<sample> of the to-be-detected sewage sample according to the obtained concentration of mixed water; and if the concentration of the water sample in the mixed water storage tank exceeds the range of the instrument, the quantity of flow of the dilution water is increased or the quantity of flow of the to-be-detected sewage is reduced, and the concentration of the mixed water is updated under the hydraulic action until the concentration of the mixed water is within the range ofthe mixed water concentration measuring instrument. The method provided by the invention can realize continuous measurement of high-concentration sewage exceeding the applicable range of an online instrument.

Description

technical field [0001] The invention relates to a continuous measurement system and method for sewage, in particular to a continuous measurement system and method for high-concentration sewage beyond the applicable range of an online meter, and belongs to the technical field of wastewater treatment. Background technique [0002] Online meters can obtain sewage water quality indicators in real time, which is a prerequisite for realizing the intelligent operation of sewage treatment and an important indicator for the normal operation of sewage treatment projects. Therefore, online meters are used in many sewage treatment projects. In order to improve measurement accuracy, different online instruments have their own measurement ranges, that is, ranges. For example, the range of COD online instruments is generally below 5000mg / L, ammonia nitrogen online instruments are generally 80mg / L, and some can reach 1000mg / L. The measuring range of these instruments can meet the determinat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/18G01N1/14
CPCG01N1/14G01N33/18
Inventor 刘志刚戴翎翎戴晓虎顾战北
Owner TONGJI UNIV
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