Comprehensive air floating system for pressure dissolution electrolysis

Abstract

The comprehensive air floating system as one new-type sewage treating equipment features that in the capture are a of pressure dissolution pool, electrolysis electrodes are installed to form electrolytic capture area. The electrode plastes are made of metal material without stripping of metal ions, and the power source is a power generating dissolved gas releasing machine. The technological principle is that by combining electrolytic air floating and pressure dissolving air floating, the sewage treatment is one process of electrochemical oxido-reduction, electrophysical coagulation and solid-liquid separation. Compared with individual electrolytic air floating system or pressure dissolving air floating system, the comprehensive air floating system has ever high water treating effect, low treating cost and ever wide adaptable range.

Description

technical field [0001] The invention relates to a novel air flotation complete set, which is suitable for use as a process unit of electrochemical physicochemical and solid-liquid separation in the water supply and drainage treatment process system. It is suitable for the treatment of various industrial wastewater such as papermaking, printing and dyeing, medicine, petrochemical, chemical industry, chemical fiber, leather, brewing, food processing, mechanical processing and electroplating, etc., to remove organic pollution and separate solid and liquid, and also to remove algae and turbidity in rivers and lakes water treatment. [0002] Its basic working principle is to improve electrolytic air flotation and pressure-soluble air flotation, learn from each other's strengths, and combine them skillfully to make them integrated. Background technique [0003] Electrolytic air flotation can effectively treat industrial wastewater polluted by various organic substances, and remov...

AI Technical Summary

Problems solved by technology

[0023] 1. During the operation of electrolytic air flotation, the sewage passes through the first-stage electrode, producing a large number of flocs and a small amount of micro-bubbles. Less than half of the flocs are captured by the micro-bubbles and surfaced, while most of the flocs float with the water body. When it flows into the second-level electrode area, since the flakes are electrolyte conductors, the conductivity of the water body is uneven, causing the current to form a large number of local short circuits

When the same water body enters the latter electrode area again, a more serious current short circuit phenomenon occurs

[0024] 2. After the electrode has been used for a period of time, about 300 hours or so, due to the uneven conductivity of the water body, the discharge surface of the metal electrode is uneven, and the ionization of the surface metal ions into the water is also uneven, resulting in a large number of local pits and bosses on the surface

Although electrochemical oxidation has not been widely used in practice, people have placed high hopes on it.”

[0028] Although pressure-dissolved air flotation treatment of organic matter-contaminated wastewater has low investment, low operating costs, long operating cycle, and high removal rate of CODer, but the following three reasons limit its popularization and application:

[0029] 1. The amount of sludge produced is relatively large, the investment to eliminate secondary pollution is large, and the operating cost is correspondingly high

[0030] 2. When the CODer concentration of raw water is higher than a certain value, there is a nonlinear relationship between dosing and CODer removal, so that it has an adaptable range to the CODcr concentration of raw water, generally CODcr≤2000mg / L, beyond this range, the removal unit of CODcr The amount of dosing increased sharply, and the amount of sludge produced also increased sharply, making the operating cost unbearably high

[0031] 3. It has little effect on the treatment of some industrial sewage, especially some industrial sewage with large chroma pollution

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