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Online filtering method and filtering device for water sample monitoring

A technology of filtering device and filtering method, which is applied in sampling device, preparation of test samples, filtering circuit, etc., can solve the problems of reducing the service life of analytical instruments, threats to analytical measuring instruments, affecting water quality measurement indicators, etc., so as to improve the service life. , the effect of reducing maintenance costs

Pending Publication Date: 2020-06-09
河北科瑞达仪器科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the water quality monitor in the prior art performs online monitoring on a water sample with high turbidity, there are many and relatively large sedimentable particles such as sand and gravel, suspended particles with the same density as the water sample, etc. Floatable fibrous floating particles, especially in sewage treatment plants, iatrogenic sewage, and textile, printing and dyeing, papermaking and other production sewage, the impurities in the water samples not only affect the water quality measurement indicators, but also pose a threat to the analysis and measurement instruments , reducing the service life of the analytical instrument

Method used

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  • Online filtering method and filtering device for water sample monitoring
  • Online filtering method and filtering device for water sample monitoring
  • Online filtering method and filtering device for water sample monitoring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] An online filtration method for water sample monitoring, comprising the following steps:

[0051] a. The water samples in the pipeline are drawn out online, and the water body is stratified by reducing the flow rate of the water body, the sedimentable particles in the water body sink and are discharged, and the floatable particles in the water body float up and are discharged with the continuous entry of the water body;

[0052] b. The suspended particles contained in the water body are filtered through the external light type metal filter membrane tube 200 to obtain water samples and lead them to the water quality analyzer for detection;

[0053] c. Perform reverse flushing of the external light type metal filter membrane tube 200 from the inside to the outside.

[0054] In order to realize the above online filtering method, this embodiment also includes an online filtering device for water sample monitoring.

[0055] The on-line filtration device includes a processin...

Embodiment 2

[0071] Based on the first embodiment, before step b, a primary filtration of the suspended particulates contained in the water body is also included to remove large suspended particulates.

[0072] The water sample filtering device also includes a filter chamber 600, which is closed and sleeved outside the external light type metal filter membrane tube 200, and is provided with filter holes for initially filtering suspended particles, which can protect the external light type metal filter membrane tube 200. , the bottom of the filter chamber 600 is provided with a one-way baffle 603 that can be opened when the backwash mechanism 500 is working.

[0073] Such as Figure 4 As shown, one end of the one-way water baffle 603 is hinged to the warehouse body, and a tension spring 604 is fixed between the inner side of the water baffle 603 and the inner wall of the warehouse. When the backwash mechanism 500 works, the high-pressure gas Or the liquid overcomes the tension of the circl...

Embodiment 3

[0077] Based on the second embodiment, the filter chamber 600 includes a sheathed outer chamber body 601 and an inner chamber body 602, the outer chamber body 601 and the inner chamber body 602 are fixed with the maintenance tube 400, and the outer chamber body 601 and the inner chamber body 602 are fixed. There is a space between the bin bodies 602, and the upper end surfaces of the outer bin body 601 and the inner bin body 602 have filtering holes staggered up and down.

[0078] By staggering the filter holes on the outer bin body 601 and the inner bin body 602 up and down, through the cross-flow, the settleable particles entering through the outer bin body 601 will fall vertically under the action of gravity, and the corresponding inner bin body 602 will No filter holes are provided, so that the settleable particles can be kept out of the inner bin body 602 . In addition, through the filtering function of the filter hole, it can prevent floating and suspended particles from...

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Abstract

The invention discloses an online filtering method and filtering device for water sample monitoring. According to the invention, an inner cavity of a treatment bin is divided into a liquid separatingbin, a settling bin, a floating bin and a suspending bin; settleable particles, suspended particles and floatable fibrous floating particles in a water sample can be separated; the settleable particles are discharged from a continuous sand discharge port after settling; the floating particles are discharged from a liquid outlet along with water flow after floating upwards; then the suspended particles are filtered through a filter, so the water sample only contains trace tiny particles; and thus, the maintenance cost of a water sample analyzer is reduced, and the service life of the water sample analyzer is prolonged. Besides, an external light type metal filtering membrane tube is adopted as an apparatus for filtering the suspended particles; after the water sample is collected, the external light type metal filtering membrane tube can be directionally cleaned from inside to outside by utilizing a backwashing mechanism; and the backwashing of each circulation process further ensures that a qualified water sample is sucked.

Description

technical field [0001] The invention relates to the technical field of water sample monitoring, in particular to an online filtering method and filtering device for water sample monitoring. Background technique [0002] Water quality monitoring is the process of monitoring and measuring the types of pollutants in the water body, the concentration and change trend of various pollutants, and evaluating the water quality status. When the water quality monitor in the prior art performs online monitoring on a water sample with high turbidity, there are many and relatively large sedimentable particles such as sand and gravel, suspended particles with the same density as the water sample, etc. Floatable fibrous floating particles, especially in sewage treatment plants, iatrogenic sewage, and textile, printing and dyeing, papermaking and other production sewage, the impurities in the water samples not only affect the water quality measurement indicators, but also pose a threat to th...

Claims

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Application Information

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IPC IPC(8): B01D36/04B01D36/02B01D65/02G01N1/14G01N1/34G01N33/18
CPCB01D36/04B01D36/02B01D65/02G01N33/18G01N33/1826G01N1/34G01N1/14B01D2321/04Y02A20/20
Inventor 郝立辉郝拴菊菅晓亮王丹张哲
Owner 河北科瑞达仪器科技股份有限公司
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