one Overview

This digestion device，Compliant with the Ministry of Environmental Protection of China (HJ828-2017) Dichromate method, replacing (GB11914-89) Dichromate method.It uses glass burr reflux pipes instead of spherical reflux pipes, and replaces tap water cooling with air cooling technology. The cooling part is mainly completed by burr condensation tubes and fans. The upper part of the condensation tube is spherical, and the catalyst is added from here to prevent the instantaneous evaporation of light components in the sample.The following section isA "burr" shape, consisting of three opposing protrusions from the condenser wall on a planeNeedle shaped burrsThe dual effect of the cooling water inside the spherical reflux pipe and the fan inside the machine ensures the reflux cooling of the sample.

two Main Features

1One click start, automatic resolution, and unmanned operation. Automatically raise the temperature to the set temperature, automatically count down for digestion reflux, automatically stop heating, delay the operation of the cooling fan, and assist in sample cooling.

2. The new type of glass burr reflux tube and heat dissipation system, with its excellent digestion reflux effect, ensures the sample digestion resultsofAccuracy.

3、Far infrared radiation heating, safe and reliable. The heating plate adopts strip heating wire, which has a long service life. Computer layout and wiring The heating is uniform and consistent, ensuring the parallelism of sample digestion.

4、High temperature resistant microcrystalline glass panels are flat and smooth, easy to clean, and leave no hygiene blind spots.

three Instrument structure

The instrument mainly consists of a body, a reflux tube, a fan, and a microcrystalline heating plate wait4 major components, using microcomputer PID technology for timed control of heating electric furnace plates and fans, can6-12Simultaneously heating the conical flask reflux device.

Preparation and operation of chemical solutions for instrumentsThe calculation of COD follows the (HJ828-2017) dichromate method.

four Technical specifications:

Measuring range:16～1000mg/L 1000~10000mg/L (diluted with water sample)

Measurement time: NosmallYu2 hours

Measurement error: Potassium hydrogen phthalate standard solution（500mg/L）， The relative standard deviation is not greater than 5.0%; Industrial organic wastewater (500mg/L), with a relative standard deviation not exceeding 8.0%

Environmental temperature: Room temperature~40℃

Power supply voltage:AC220V 50HZ

Heating power:1650W/2000W（AC 220V,50HZ）

Sample Quantity : 6 /8 / 12One (using)Grinding mouth 250mlCone shaped bottle

Note:The 12 well digestion device adopts (150ml conical flask) or (250ml cylindrical flask) or (250ml conical flask)