Novel special air dissolving system for air floatation

Abstract

The invention discloses a novel special air dissolving system for air floatation. The novel special air dissolving system for air floatation comprises a reflux pump, a dissolved air tank and an air compressor, the outlet of the reflux pump is fixedly connected with a guide pipe, the top end of the guide pipe is fixedly connected with a connecting elbow, the connecting elbow is communicated with the dissolved air tank through a connecting flange, and a first one-way valve is fixedly installed at a position, close to the bottom end, outside the guide pipe. The novel special air dissolving systemfor air floatation directly controls the air inflow and the pressure in the dissolved air tank by adopting a filtering pressure reducing valve and an electromagnetic valve, so the gas-liquid balancein the dissolved air tank is ensured, and the instability caused by the fact that a traditional air dissolving system controls the liquid level balance in the air dissolving tank through a liquid level switch is eliminated, thereby the system runs accurately, stably and reliably; and a damping device arranged in the invention can provide an excellent damping effect when the reflux pump works, so collision noise generated by vibration of the reflux pump and the ground is reduced, and the use comfort effect is improved.

Description

technical field [0001] The invention relates to the field of dissolved air systems, in particular to a novel dissolved air system specially used for air flotation. Background technique [0002] The new dissolved air system dedicated to air flotation is a solid-liquid or liquid-liquid separation system for sewage treatment. It mainly produces a large number of microbubbles through high-pressure reflux of dissolved air water under reduced pressure, making it close to the density of wastewater. Adhere to solid or liquid particles of water to form an air flotation body with a density lower than that of water. Under the action of buoyancy, it floats up to the water surface for solid-liquid or liquid-liquid separation. The current pressurized dissolved air flotation equipment on the market The dissolved air system dissolves the air in the water in the dissolved air tank in the form of pressurization, thereby forming dissolved air water, which is released into the water through the...

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Problems solved by technology

[0002] The new dissolved air system dedicated to air flotation is a solid-liquid or liquid-liquid separation system for sewage treatment. It mainly produces a large number of microbubbles through high-pressure reflux of dissolved air water under reduced pressure, making it close to the density of wastewater. Adhere to solid or liquid particles of water to form an air flotation body with a density lower than that of water. Under the action of buoyancy, it floats up to the water surface for solid-liquid or liquid-liquid separation. The current pressurized dissolved air flotation equipment on the market The dissolved air system dissolves the air in the water in the dissolved air tank in the form of pressurization, thereby forming dissolved air water, which is released into the water through the releaser under reduced pressure, generating a large number of tiny bubbles, and passing through the suspended matter flocs in the water Bonded together to make it adhere to the solid or liquid particles in the wastewater whose density is close to that of water, resulting in a state where the overall density is lower than that of water, and relying on buoyancy to make the suspended matter rise to the water surface together with the microbubbles, forming scum, so that The suspended flocs in the water are removed; in order to ensure the effect of dissolved air, the liquid level in the dissolved air tank should be kept relatively stable, but the pressurized dissolved air system currently on the market generally uses a liquid level switch to convert the liquid level signal into an electrical signal through control The system controls the start and stop of the air compressor to maintain the gas-liquid balance in the dissolved air tank. However, due to the instability of the output air pressure of the air compressor itself and the complexity of the liquid level control method, it is easy to cause the liquid level control to fail, and the dissolved air efficiency is obvious. The equipment cannot run stably for a long time, and it does not have the effect of shock absorption. The return pump will generate high vibration during operation, and it is easy to generate noise.

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