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Your current location:homepage > COD digestion apparatus > JHR-2energy COD Thermostatic heater
JHR-2energy COD Thermostatic heater
be published in:2020-01-14

Product name: Energy-saving COD constant temperature heater JHR-2 )

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product description

This device is composed of energy-saving COD constant temperature heater, heating tube and air condensation tube.

The energy-saving COD constant temperature heater uses a cast aluminum furnace body with good thermal conductivity. The furnace body is evenly distributed with 12 constant temperature heating tanks, which can make 12 samples at the same time .

Furnace temperature by the temperature sensor to control the transmission line, and the automatic selection of a condenser tube and a heating temperature hard material Glass glass, low thermal expansion coefficient.

When using, add the water sample and reagent to be digested into the heating tube, install the air condensing tube, and put it into the thermostatic bath.

At the operating temperature ( 165 deg.] C ~ 180 [deg.] C ) to ensure that the inner tube mixer Boiling good good, sufficient reflux.

 

 

 

 

Features

· Power saving, water saving, small volume, small heat radiation, easy operation.

· Unique technology, automatic timing, the instrument automatically cuts off the power after the response reaches 2 hours.

· Fast heating speed and uniform temperature.

 

 

 

Instructions

1. Turn on the power of the COD energy-saving heater, turn on the power switch, and insert the thermometer into the hole to warm up for 30 seconds.

The adjustment is around 170 ~ 180.

2. When the chloride ion content in wastewater exceeds 30ng / L, 0.4g of mercury sulfate should be added to the heating tube.

3. Take a .00ml water sample (or dilute it to 20.00ml) into a heating tube and add it accurately.

Into 10.00ml potassium dichromate standard solution and 30ml silver sulfate solution was added tens dried granules porcelain particles. lightly

Mix the solution by shaking the heating tube.

4. Connect the condensing tube to the heating tube, place it in a constant temperature heating hole, and heat for 2 hours from the time of boiling.

5. After boiling for 2 hours, take out the heating tube and the condensation tube from the heating hole, and place it on the heating tube support, and cool or flow naturally.

Water cooling.

6. Rinse the wall of the condenser tube and the grind with a small amount of water, carefully remove the condenser tube, dilute with water to about 140ml, add

2 ~ 3 drops of ferrous spirit indicator, add clean probe and stir, use electromagnetic ferrous sulfate standard

The end point is the titration of the solution until the solution color changes from yellow to blue to reddish brown. If there is no electromagnetic stirrer,

The solution in the heating tube was quantitatively transferred to a 500 ml Erlenmeyer flask, diluted with water to about 140 ml and titrated to the end.

7. While measuring the water sample, perform a blank test with 20ml of distilled water according to the same operation steps, and record the titration blank.

The amount of ferrous ammonium sulfate standard solution.

 

 

 

 

 

 

Product parameters

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