Dissolved air tank with adjustable vapor liquid ratio

Abstract

The invention provides a dissolved air tank with an adjustable vapor liquid ratio. A dissolved air pump, electric control valves, a circulating water flowmeter, a brake valve, a check valve and a dissolved air tank are connected in series through a pipeline of an air floating system; a pipeline at the outlet side of each dissolved air pump is connected in series with the electric control valve, and then connected with a relief pipe; a water inlet pipe is connected in series with an online turbidity meter and a water inlet flowmeter; an automatic air inflow regulating valve and a vacuum pressure sensor are connected with the pipeline at the inlet side of the dissolved air pump; a pressure sensor and an automatic air exhausting device are arranged at the upper part of the dissolved air tank. The flowmeter and the control valves are additionally arranged in the dissolved air system of the air floating machine, and meanwhile the online turbidity meter and the flowmeter are mounted at the water inlet side, so that the vapor liquid ratio can be automatically adjusted to be adapted to the water inlet quality and the flow change, and the air dissolving efficiency can be improved.

Description

Technical field: [0001] The invention relates to the technical field of sewage treatment, in particular to an air-dissolving tank with an adjustable gas-liquid ratio. Background technique: [0002] The maximum solubility of air in water mainly depends on the pressure, water temperature and water quality. The higher the pressure and the lower the water temperature, the greater the saturation solubility of air in water. According to the properties of gas and liquid, and the change of temperature and pressure, gas in liquid The saturation solubility in the air is different. In order to capture the suspended matter as much as possible, the air bubbles in the air flotation should be as small as possible and distributed evenly. At present, the saturation solubility of gas (air) in water depends on the temperature and pressure of the water. The saturation solubility of gas (air) in water under temperature and pressure conditions is also different. The gas-liquid ratio adjusted by t...

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Problems solved by technology

[0002] The maximum solubility of air in water mainly depends on the pressure, water temperature and water quality. The higher the pressure and the lower the water temperature, the greater the saturation solubility of air in water. According to the properties of gas and liquid, and the change of temperature and pressure, gas in liquid The saturation solubility in the air is different. In order to capture the suspended matter as much as possible, the air bubbles in the air flotation should be as small as possible and distributed evenly. At present, the saturation solubility of gas (air) in water depends on the temperature and pressure of the water. The saturation solubility of gas (air) in water under temperature and pressure conditions is also different. The gas-liquid ratio adjusted by the multiphase pump used in the air flotation machine is mostly adjusted by manually adjusting the pressure, vacuum degree, gas flow rate, and circulating water flow rate of the pump. The gas-liquid ratio is controlled, and the circulating water is set relative to the total water inflow. The dissolved air system cannot respond accordingly to the water quality and water volume changes of the sewage, thereby reducing the air flotation effect and making the air flotation machine no longer To adapt to the impact brought by changes in water quality and treatment volume, the treatment effect is not ideal

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