EXPERTS IN ANALYS S

Microcontroller Device for Online-H2S-Control

www.ECH.de

H2Sonline

Description

onlineH2S includes a microcontroller-unit for a quantitative determination of the released H2S from the sewer with sensor technology at two or more selected measurement points. It serves as the basis for H2S-adapted regulation of chemicals for water treatment in sewage systems.

The H2S-measurement works with selective electrochemical sensors. The mobile microcontroller includes a data acquisition and data transmission tool, digital and analogue input connections for various measurands as well as digital and analogue alarm output connections (4-20mA) for controlling of dosing pumps for treatment-chemicals, valves etc.. Data can be downloaded by a secured internet transfer line at any time.

The control-algorithm includes an intelligent self-learning system of settings, which reacts immediately to local circumstances of the sewage-volume and H2S-carriage. By evaluating those information, an optimal dosing-value will be determined automatically that will be used for the water treatment with chemicals in the sewage system.

H2Sonline

Applications

• Eliminationscentannoyancefromurbanandindustrialsewage (pressure pipes, sewer tunnels, grease separator, reduction of tension shafts, pump sumps, public streets and places)• Preventionofthebio-corrosionatwastewater-leadingbuildings• Usedforurbanwaste-water-communities,sewageplants, waste water treatment and purification plants

Principle

• Online-measurementofactualH2S-concentration in waste water supply (e.g. pump sump) and waste water drainage (sewer tunnel or pressure pipes) • Veryhighsensitivity(below0.01ppm)withthemostprecision• Selectiveelectrochemicalsensors• Integratedrinsingstepsforthecertaintyofasteadycurrentsampleforanalysis• Directcalibrationofactualsulfide-concentrationin waste water• Automaticzero-point-compensation• Determinationofaoptimalcontrol-algorithmfor dosing chemicals of the waste water (4-20 mA signal) through adaptation at the current H2S-carriage and water volume (4-20 mA signal)• Thresholdselectivitybyanauthorizedperson

Diagrams H2S-pressure pipe inlet (blue) / outlet (red)

principle of the Sulphox-4-method

example for on-site application

Pump sump

Sewertunnel

Pressure pipeSupply

Drain

S

Containerwith

propor-tioning

chemical

Fluidliner

S

S

continuous Measurement:gas phase: H2Sfluid phase: H2S

Radio signalcontinuous measurement:gas phase: H2S

Regulation

ControllingDocumentation

MeasurementsH2S

Radio signal

Sewertunnel

• Completemeasurementsystemwithdataacquisitionattwoormoremeasurement-pointsbyH2S-monitoring• Calibrationrelatedtotheconcentrationofsulphideinwastewater• Highsensitivity(below0.01ppm)• Suckofthegassamplebyatransferline(upto50mlengthand10mdepth)• Selectiveelectrochemicalsensors• Lowmaintenanceeffortbyautomaticzero-point-compensation• Longlife-timeofthesensorduetoanintermittentgaspathcontrol• Integratedrinsingstepsinordertoguaranteecurrentsamplesforanalysis• Analogueinputconnectionsforvariouspumpsandsignals• Potentialfreeswitchingoutputs(e.g.sewagepumps)• Outputsignal(4-20mA)tocontroldosingpumpsforwater-treatment-chemicalsinodertosendthe signals to a customers’ process control system • Directdataacquisitioninthedeviceforseveralmonths• DatatransmissionviaGPRS

designed by five-senses.de

Power supply: mains or battery operated 115-230V,50-60Hz, 12VDC(internalbattery)Powerinput: 40Wmaximum,5Wstandby-modeMeasuringrange: 0.01–2000ppmTypical duration: 24 hour online-measurementInput signal: 4 - 20 mA analogue (isolation amplifiers) or digitalOutput signal: 4 - 20 mA analogue (isolation amplifiers) or digital to control the dosing pumpsProtectiontype: IP65Dimensions & weight: H2S-Sensor:200x250x122mm,2kgDimensions & weight: H2S-Controller:380x210x600mm,10kg

Advantages

Specifications

ECHElektrochemieHalleGmbHWeinbergweg23D-06120Halle(Saale)Tel:+49-345-5583-711Fax:+49-345-5583-710E-mail: info@ech.deInternet: www.ech.de

EECHCH

We are here for you