CN1912569A - Preprocessing device of COD on-line detector - Google Patents
Preprocessing device of COD on-line detector Download PDFInfo
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- CN1912569A CN1912569A CN 200610053263 CN200610053263A CN1912569A CN 1912569 A CN1912569 A CN 1912569A CN 200610053263 CN200610053263 CN 200610053263 CN 200610053263 A CN200610053263 A CN 200610053263A CN 1912569 A CN1912569 A CN 1912569A
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- sampling
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
A preprocessing device of COD on-line detector is prepared setting ultrasonic homogenizer formed by homogenizing chamber and ultrasonic transverter between filter and sampling pool through pipeline, connecting control valve on pipeline between ultrasonic homogenizer and sampling pool, setting an overflow tube at middle of sampling pool to form quantitative sampling pool, setting sampling solenoid valve at bottom of sampling pool by pipeline and connecting a running water inlet slipknot to sampling pool through a cleaning pipeline.
Description
Technical field
It is the pretreatment unit of the online detection of a kind of waste water that the present invention establishes what relate to, belongs to water-treatment technology field.
Background technology
The water sample that enters the instrument detection for assurance should be uniform and stable, no bulky grain suspension, and water sample generally all carries out pre-service before COD detects sample introduction.The preprocessing process of COD detection at present mainly is that test sample is filtered, and guarantee that the water sample that enters in the instrument detecting flow process does not have the bulky grain suspension, thereby the risk of lowering apparatus line clogging reduces failure rate.Second pond water outlet after sanitary sewage, industrial waste water and the biochemical treatment contains activity or inertia organic particulate matter mostly, and some water sample also contains more bulky grain suspension, and these organic granulars have higher COD value usually, are the important pollutants of water sample.Adopt the method for filtering to carry out pre-service, these COD materials can be filtered out together, cause the deviation of testing result.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned existence, and a kind of COD on-line detector pretreatment unit that can carry out effective wastewater treatment is provided.This pretreatment unit is made up of filtrator, sampling pond, battery valve and respective line, have access to the ultrasonic homogenizer that constitutes by levelling chamber and ultrasonic transducer by pipeline between described filtrator and the sampling pond, on the pipeline between ultrasonic homogenizer and the sampling pond, be connected to operation valve.
The middle setting in described sampling pond is by a run-down pipe and constitute the quantitative sampling pond, and its underpart is connected to the sampling solenoid valve by picking out pipeline.
Described sampling pond also is connected to the slip-knot of a band running water inlet by at least one detergent line and ball valve.
The invention belongs to a kind of improvement to prior art, it can make the water sample of detection uniform and stable, has guaranteed that water sample does not have the bulky grain suspension, the risk of lowering apparatus line clogging reduces failure rate and has improved work efficiency, has simple in structure, easy to use and reliable, characteristics such as the water sample pretreating effect is good.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a levelling chamber of the present invention structural representation.
Fig. 3 is a sampling pool structure synoptic diagram of the present invention.
Embodiment
The present invention will be described in detail below in conjunction with accompanying drawing: shown in the accompanying drawing 1, the present invention mainly is made up of filtrator 8, sampling pond 12, battery valve and respective line, have access to the ultrasonic homogenizer 9 that constitutes by levelling chamber 14 and ultrasonic transducer 15 by pipeline between described filtrator 8 and the sampling pond 12, see shown in the accompanying drawing 2; On the pipeline between ultrasonic homogenizer 9 and the sampling pond 12, be connected to three-way solenoid valve 10.
Shown in 3, the middle setting in sampling of the present invention pond 12 is by a run-down pipe 16 and constitute the quantitative sampling pond in conjunction with the accompanying drawings, and run-down pipe 16 lower ends are waste water outflow mouth 4; The bottom in sampling pond 12 is connected to sampling solenoid valve 13 by picking out pipeline.Described sampling pond 12 also is provided with the slip-knot 5 of a band running water inlet 1 by at least one detergent line 7, two three-way electromagnetic valves 11 and ball valve 6.
Waste water is entered by waste water import 3, enters ultrasonic homogenizer 9 by the water sample that filters by filtrator 8.Unnecessary waste water is discharged by return of waste water mouth 2.Water sample through the ultrasound wave homogenizing enters sampling pond 12 by solenoid valve 10, and when waste water reaches certain volume in the sampling pond after, unnecessary waste water will be discharged by run-down pipe 16.When needs dilute, a certain amount of waste water can be put the container that stirs to a band from valve 13, advance by detergent line 7 again that tap water is interior to sampling pond 12 to be put into previous container equally to the certain volume and sample.Mix sampling and also can be undertaken, just will dilute tap water and change new water sample into by same method.
Because the content of the general COD of tap water is all below 10, and the water sample COD value that needs dilution is more than 5000, thereby can not impact accuracy of detection.
The tap water that is used to dilute also can be used for cleaning whole pipeline, can finish aforesaid operations by transfer valve 10 and 11.
The present invention is because ultrasound wave plays cavitation in liquid, this cavitation be since liquid under action of ultrasonic waves, during fluid molecule and tension, the time and pressurized forms small one by one cavity, i.e. what is called " cavitation bubble ".Because the external and internal pressure of cavitation bubble differs very greatly different, has very big impulsive force when " cavitation bubble " disappears, make bulky grain division, homogenizing in the liquid.Meanwhile, ultrasound wave can play the accelerate dissolution effect again in liquid.Like this, we just can obviously observe original larger particles suspension all pulverize powder, equally distributed suspension small particle after a few minutes, so far water sample reached fully mix, the degree of homogenizing.
The advantage of ultrasound wave homogenizing water sample is removed easy and simple to handle, and beyond action time was short, prior this method that is was a kind of processing procedure of physical property to the effect of sample fully, does not change composition, content and the character of water sample.
Waste water of the present invention enters pretreatment unit by waterwater entrance, and by a sampling by filtration head, the main effect of this filtrator is the large particulate matter of filtering diameter greater than 1.5mm, prevents the obstruction of pipeline.Carry out the ultrasound wave homogenizing by a ultrasonic homogenizer.At this moment, suspension is broken, homogenizing powders material, enters the quantitative sampling pond.
For the higher waste water of detectable concentration, this device can carry out diluting before the sample introduction.Sample can be carried out 1-4 and doubly dilute, thus the measurement range of raising instrument.
This pretreatment unit detects after also can the test sample of several periods being mixed by the sampling solenoid valve together, can require to realize several mixing sample detecting that wait flow, equal time sample at different detections.
Filtrator of the present invention is a column type, and inside is equipped with sampling head, and filtrator, homogenizer are made by stainless steel; The sampling pond has organic glass to make.
The present invention can realize following function, 1, water sample is carried out homogenizing handle; During 2, at measurement high range COD, dilute automatically; 3, realize the instrument equal proportion sampling, mix sample detecting by the metering pond.4, has automatic cleaning function.
Claims (3)
1, a kind of COD on-line detector pretreatment unit, it mainly is made up of filtrator, sampling pond, battery valve and respective line, it is characterized in that having access to the ultrasonic homogenizer (9) that constitutes by levelling chamber (14) and ultrasonic transducer (15) by pipeline between described filtrator (8) and the sampling pond (12), on the pipeline between ultrasonic homogenizer (9) and the sampling pond (12), be connected to operation valve (10).
2, COD on-line detector pretreatment unit according to claim 1 is characterized in that the centre in described sampling pond (12) is provided with a run-down pipe (16) and constitutes the quantitative sampling pond, and its underpart is connected to sampling solenoid valve (13) by picking out pipeline.
3, COD on-line detector pretreatment unit according to claim 1 is characterized in that described sampling pond (12) also is provided with a slip-knot (5) that has running water inlet (1) by at least one detergent line (7) and ball valve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610053263 CN1912569A (en) | 2006-08-30 | 2006-08-30 | Preprocessing device of COD on-line detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610053263 CN1912569A (en) | 2006-08-30 | 2006-08-30 | Preprocessing device of COD on-line detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1912569A true CN1912569A (en) | 2007-02-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610053263 Pending CN1912569A (en) | 2006-08-30 | 2006-08-30 | Preprocessing device of COD on-line detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1912569A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101620214A (en) * | 2009-07-23 | 2010-01-06 | 湖南力合科技发展有限公司 | Movable water quality automatic emergent monitoring system |
| CN101844002A (en) * | 2010-05-07 | 2010-09-29 | 中国科学院南海海洋研究所 | On-line filtering device and control method of water samples in underwater in-situ monitoring |
| CN105203475A (en) * | 2015-09-11 | 2015-12-30 | 中国石油化工股份有限公司 | Method of determining chemical oxygen demand in chlorine-containing water sample |
| CN107449882A (en) * | 2017-07-24 | 2017-12-08 | 东华工程科技股份有限公司 | A kind of high-concentration sewage COD on-line monitoring systems |
-
2006
- 2006-08-30 CN CN 200610053263 patent/CN1912569A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101620214A (en) * | 2009-07-23 | 2010-01-06 | 湖南力合科技发展有限公司 | Movable water quality automatic emergent monitoring system |
| CN101844002A (en) * | 2010-05-07 | 2010-09-29 | 中国科学院南海海洋研究所 | On-line filtering device and control method of water samples in underwater in-situ monitoring |
| CN105203475A (en) * | 2015-09-11 | 2015-12-30 | 中国石油化工股份有限公司 | Method of determining chemical oxygen demand in chlorine-containing water sample |
| CN107449882A (en) * | 2017-07-24 | 2017-12-08 | 东华工程科技股份有限公司 | A kind of high-concentration sewage COD on-line monitoring systems |
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Open date: 20070214 |