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Plasma process for preparing acid water

A technology of plasma and acid water, applied in the field of water treatment, can solve the problems of limited application of operating conditions and the inability of acid water to exist stably, and achieve the effect of easy preservation

Inactive Publication Date: 2004-04-28
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, supercritical water needs to be formed at a temperature higher than 647K and a pressure of 221bar, and the harsh operating conditions limit its application in chemical reactions.
The patent (applicant: Tian Guoliang, application number 99100215.6, publication number, CN1261057A) discloses a process of purifying water with high-frequency pulse power supply and ultraviolet extinguishing lamp, which can form band H in the process. + acidic water and H - Alkaline water, but its purpose is to remove heavy metals and radioactive substances in the water, and the water will immediately return to its normal structure after treatment, that is, acidic water in this case cannot exist stably

Method used

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  • Plasma process for preparing acid water
  • Plasma process for preparing acid water
  • Plasma process for preparing acid water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Such as figure 1 In the shown dielectric barrier plasma generator, the quartz tube 1 containing the positive electrode is placed in the stainless steel tube 2 as the negative electrode, and connected to a high-voltage power supply, and distilled water is placed between the stainless steel tube and the quartz tube. The water enters from the direction of the inlet 3, and the treated acidic water flows out from the direction of the outlet 4. During the treatment, 1000V AC high voltage is applied, and the treatment time is 120 minutes. It flows in from the direction of the inlet 5 and flows out from the direction of the outlet 6 of the jacket, and the temperature is 76°C.

[0012] Using the electric DDS-11A conductivity meter to measure the conductivity of the effluent water, the measured conductivity is 6.10E+03μS / cm, and the conductivity of ordinary distilled water is 3.6μS / cm. It can be seen that after plasma treatment The conductivity increased by 1000 times, indicatin...

Embodiment 2

[0016] The deionized water was treated according to the steps of Example 1, the treatment time was 10 minutes, the treatment voltage was an AC high voltage of 5000V, and the circulating water temperature was 90°C.

[0017] Using the analysis steps in Example 1, the measured conductivity is 3.51E+03 μS / cm, and the pH value is 2.64.

Embodiment 3

[0019] Distilled water was treated according to the steps of Example 1, the treatment time was 30 minutes, the treatment voltage was 3000V AC high voltage, and the circulating water temperature was 82°C.

[0020] Using the analysis steps in Example 1, the measured conductivity is 4.61E+03 μS / cm, and the pH value is 2.24.

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Abstract

The present invention relates to a kind of acid water preparing process. Neutral water or its vapor is set inside plasma generator, and DC or AC voltage of 300-5000 V is applied across the electrodes for reaction of 10-300 min. The plasma generator may be one of dielectric blocking discharge or corona discharge. The acid water prepared through the plasma process has conductivity 10-2000 times higher than that of common water, and pH value up to 1.89. The acid water may be preserved for long period and has property not affected by freezing and heating. The acid water may be used as efficient and clean acid to replace inorganic acid with serious pollution for wide use.

Description

technical field [0001] The invention relates to water treatment technology, in particular to a method for preparing acidic water by plasma. Background technique [0002] Liquid acid has extremely important applications in petrochemical, organic synthesis, inorganic synthesis and other fields. At present, highly polluting and highly corrosive liquid strong acids such as hydrochloric acid and sulfuric acid are generally used. In order to seek a better environment-friendly acidic medium, research mainly focuses on the use of solid acid to replace liquid acid, C.S.Cundy, P.A.Cox, Chemistry Review, 103(2003) 663-701 to the preparation method and application field of zeolite molecular sieves currently used in large quantities A summary has been made, but the preparation process of solid acid is complicated, the cost is high, and it does not have the solvent function of liquid acid. As the most common solvent in nature, water has many potential fun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C02F1/48
Inventor 刘昌俊邹吉军张月萍
Owner TIANJIN UNIV
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