Potassium persulfate purification device

Abstract

The invention relates to a potassium peroxodisulfate purification device which comprises a purification box body; a middle partition plate is longitudinally arranged in the purification box body and divides the purification box body into a left cavity and a right cavity; a first motor is downwards hung on the top of the left cavity, a first stirring rod extending into a first container groove is connected to the lower portion of the first motor, and an electric heating pipe is arranged below the first container groove; a first temperature sensor is arranged in a port of the electric heating pipe, a first digital display temperature regulator is arranged on the left side of the left cavity, a second motor is downwards hung on the top of the right cavity, a second stirring rod extending into the second container groove is connected to the lower portion of the second motor, and a second temperature sensor and a cold conduction block are arranged on the outer wall of the second container groove; the cold conduction block is connected with a semiconductor refrigeration block, the semiconductor refrigeration block is connected with a heat conduction block, the heat conduction block is connected with a cooling fan, and the right side of the right cavity is provided with a second digital display temperature sensor; and the purification device integrates heating, cooling, crystallization and drying, the purification cost is reduced, and the purification efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of purification devices, in particular to a potassium persulfate purification device. Background technique [0002] With the strengthening of environmental protection control, the frequency of determination of total nitrogen in water bodies has increased, and the amount of potassium persulfate used as an oxidation and digestion agent has increased significantly. The total nitrogen content of domestic analytical pure and superior pure potassium persulfate is required to be less than 0.005%, while in HJ636-2012 "Determination of total nitrogen in water quality by alkaline potassium persulfate digestion spectrophotometry", the total nitrogen content is required to be less than 0.0005%, which cannot Meet the detection requirements of total nitrogen in water. At present, they basically rely on imports, but the imported potassium persulfate is expensive, 800 yuan / 500g, and the quality is not stable, and the nitro...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, adopt recrystallization method to purify potassium persulfate: the first step, add water in container, when heating to about 40 ℃ in water bath, add potassium persulfate gradually, stir, till potassium persulfate can not be dissolved; In the second step, put the completely dissolved saturated potassium persulfate solution until cooling, and then put it in a refrigerator for recrystallization; in the third step, after the recrystallization is completed, pour out the supernatant, and pour ice deionized water into the Clean the crystals in a beaker for 2 to 3 times; Step 4: Repeat the above steps to recrystallize again. After the crystals are cleaned, pour out the supernatant, and then put the crystals in an oven to dry to obtain the finished product. Use this method to recover, and the recovery rate Low and the recovery rate of three recrystallizations is less than or equal to 30%. Heating and cooling are required in the process of crystal purification, which takes a long time and is cumbersome to operate.

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