Multifunctional solar photocatalytic oxidation-membrane separation three-phase fluidized bed circulating reaction device

Abstract

The invention discloses a multifunctional solar photocatalytic oxidation-membrane separation three-phase fluidized bed circulating reaction device. The multifunctional reaction device comprises a photocatalytic oxidation reaction area constituted by a lighting plate, a solar tracking device, a tubular reactor, an upper water tank, a lower water tank and a first aeration device and a membrane separation area constituted by a membrane separator housing and a membrane component, wherein a second aeration device can be arranged at the bottom of the membrane component according to needs; the upper water tank and the membrane separator housing can be of open type or closed type with an exhaust device; and the upper water tank, the lower water tank, the membrane separator housing, a circulating pipe and a communicating pipe can be coupled with a sunlight energy collecting plate according to the needs so as to have the functions of heat insulation and heating, and a heating device can be arranged in the multifunctional reaction device according to the needs. The multifunctional reaction device disclosed by the invention has the characteristics of diversity in structure and functions, high utilization rate of light energy, high mass transfer efficiency and the like, and can perform not only photocatalytic oxidation reaction, but also light and heat synergic catalytic oxidation reaction.

Description

technical field [0001] The invention relates to a multifunctional solar photocatalytic oxidation-membrane separation three-phase fluidized bed circulation reaction device (multifunctional reaction device), which can be applied to the pretreatment or advanced treatment of toxic, harmful and refractory organic wastewater , It can also be applied to the advanced treatment of slightly polluted drinking water. Background technique [0002] With the rapid development of my country's social economy, a large amount of waste pollutants are inevitably produced, which leads to serious environmental pollution and ecological damage. Traditional treatment methods cannot completely eliminate degradation pollutants, and are likely to cause secondary pollution, with narrow application range and high energy consumption. In recent years, the use of photocatalytic oxidation technology to degrade pollutants has received widespread attention. Photocatalytic oxidation technology has become an ef...

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Problems solved by technology

However, due to the low flow rate of this type of reactor, the Reynolds number is small, and the fluid is in a laminar flow state, there are mass transfer limitations

At the same time, the reactor is operated in a non-closed manner, and the catalyst is greatly affected by the surrounding environment, which may easily cause catalyst poisoning

[0010] (2) Suspension-type photocatalytic reactor: The efficiency of the suspension-type photocatalytic reactor is higher than that of the fixed type, and its advantage is that the fluid is in a turbulent state without mass transfer restrictions; at the same time, the reactor is in a closed state and there is no volatile pollution In addition, the structure of the reactor is simple and the investment cost is low; but it has the problem of separation, collection and reuse of the catalyst, so how to realize the recycling of the catalyst is the main problem faced by the suspension photocatalytic reactor

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