Characteristics and application of KHCOD-8G high chlorine wastewater COD digestion reflux device

KHCOD-8G typeHigh chlorineWastewater standardsCOD digestionDevice,Fully comply withHJ/T 70-2001High chlorine wastewaterDetermination of Chemical Oxygen DemandChlorine gas calibration method.

The instrument adopts microcomputer technology for timed control heatingboardYes, yes8individual250mlSimultaneous heating of conical flask reflux deviceeliminate.

The instrument adopts a glass burr reflux tube instead of a spherical reflux tube, and uses air cooling technology instead of tap water cooling, which can save water and standardize the instrument. Preparation and operation of chemical solutions for instrumentsCalculation of COD.

Suitable for wastewater in oil fields, coastal oil refineries, oil depots, chlor alkali plants, deep-sea discharge of wastewater, etcDetermination of COD.

technical specifications

1Anti chlorine interference:1000～20000mg/L

2Nitrogen flow rate:6～60mL/min

3Measurement range:≤ 1000mg/L (greater than dilution)

4Dissolving time:2hour30 Minutes（Adjustable time）

5Dissolving volume:250mL

6Measurement error:≤500mg/L， The relative standard deviation is not greater than 5.0 ；

≤1000mg/L， The relative standard deviation is not greater than 8.0%

7Heating power:1600W（220V，50HZ）

8Cooling method:Dual Fanforced air coolingAdd water for cooling

9. Microcrystalline plate heating table, make 8 samples

Instructions for using the buttons on the front panel of the instrument

1．blowwind

Control the opening and closing of the fan.

2．calmtime

Dissolve time control setting key. The instrument's startup setting time is2 hours and 30 minutes. Each press of the setting key automatically deducts 10 minutes,Determine by standard reflux methodCODIt should be set as2 hours.

3．start

Dissolve start control button, pressAfter pressing the "Start" button, the instrument will perform heating reflux digestion and automatically count down from the set value (such as 2 hours), with the heating indicator light on. When the set time is reached, the instrument automatically stops heating and the heating indicator light goes out.

4. The front panel of the instrument has8Only flow meters.

Instrument usage instructions

Install all connections according to the diagram first, familiarize yourself with them before starting the experiment.

Before powering on the instrument, as much distilled water as possible should be added from the water injection port of the reflux pipe to ensure cooling effect.

1．Turn on the power switch on the right side panel of the instrument.

At this moment, the instrument displays“000 ”“111”“222”…“999” Finally, the maximum set value for digestion time is displayed2 hours and 30 minutes, the fan is turned on simultaneously, and the fan indicator light is on.

2．Change the digestion time setting value

press'Ding'time”Press the key to decrease the digestion time until the final set value is 2 hours. Of course, the digestion time value can also be set arbitrarily as needed.

3．Start reflux digestion

press“start”Key, the instrument starts heating, digestion, and reflux. The "start" indicator light is on, and the heating indicator light is ondodgeBright.

4．Reflux digestion completed

After digestion, the instrument displays'000' flashes, the 'start' indicator light goes out, and the heating indicator light goes out.

explain:1. Instrument InstituteThere is a connecting pipeIf you want to pull it out, just press down on the gasket at the quick connector and pull the pipeline outward.

2. On the instrumentflowmeterThe nitrogen adjustment knob is precision adjustable,controlNitrogen Flow Rate.

Note: Sample processing and analysis methods refer toEnvironmental Protection Industry Standards of the People's Republic of China——Determination of Chemical Oxygen Demand for High Chlorine Wastewater - Chlorine Calibration Method.

High chlorineCOD digesterpacking list