Characteristics and application of 12 hole COD digester and 12 hole standard COD digestion device

KHC0D-12Type standardCODDissolving deviceUsing microcomputer technology, 12 300ML cylindrical bottles can be heated and refluxed for digestion simultaneously. Fully follow the HJ828-2017 national standard method to ensure boiling for 2 hours. And high-quality heating wires are selected, with reasonable heating power. The contact surface is changed to a microcrystalline surface, and the tabletop is flat and easy to clean.

KHC0D-12typeStandard CODThe digestion device adopts a specially designed heating plate panel,Microcrystalline glass countertop, overall structure, reasonable isolation design, microcrystalline heating plate is a single piece, easy to install and replace electric furnace plate,Heat evenly during heating, with fast heating and cooling rates. At the same time, accidentally dripping the sample solution makes cleaning more convenient.

KHC0D-12The standard COD digestion device can set the digestion time and display a countdown to the digestion time. After digestion is complete, the instrument automatically stops heating and the fan continues to work to assist in sample cooling. It can be left unattended.

　KHC0D-12Type standard COD digestion device,Using glass burr reflux tubes instead of spherical reflux tubes, and replacing circulating water cooling methods with air and water cooling technologies, the operation is more convenient. The cooling part is mainly completed by burr condensation tube water cooling and fan air cooling. The upper part of the condensation tube is a spherical bubble with good cooling effect. The catalyst is added here to prevent the instantaneous volatilization of light components in the sample, and can be covered with a volatilization cap. The following section is"burr"Shape refers to multiple opposing surfaces extending from the wall of a condenser tube on a plane"Cold Bubble"Compared to a simple spherical condenser tube, it increases the cooling area and can block the passage of volatile substances and vapors. In addition, the cooling water in the upper part of the spherical reflux tube and the fan inside the machine have a dual effect,KHC0D-12Type standard COD digestion device,Ensure the reflux cooling of the sample,Insert type burr reflux tube, safe and stable to use.

Technical specifications:

National standard: New standard HJ828-2017Replace the original GB 11914-89

Measurement range: 5-700mg/L; Determination after dilution of 700mg/L to 10000 mg/L water sample

Dissolving time: 1 minute to 2 hours and 30 minutes (users can choose their own heating time)

Measurement error: The relative standard deviation of potassium hydrogen phthalate standard solution (500mg/L) shall not exceed 5.0%;

The relative standard deviation of industrial organic wastewater (500mg/L) is not more than 8.0%

Environmental temperature: ≤ 40 ℃

Cooling method:Dual fan cooling system2Bubble condenser tube water cooling completed

Sample size for digestion: 12 300ml cylindrical bottles, microcrystalline platesDivided into two rows for heating and digestion, sampling is very easy to clean.

Heating power: ＜ 1800W (AC 220V, 50HZ)

Heating table:Microcrystalline glass heating table top, overall structure of heating plate, overhead heating, easy to replace and maintain by removing directly.

Instrument size: 490 * 290 * 605mm (H)

Note:KHCOD-8Z national standard COD digestion reflux device (8 250ML conical flasks)