Capacity expansion method of photocatalytic wastewater degradation reactor for improving medium recovery

Abstract

The invention relates to a capacity expansion method of a photocatalytic wastewater degradation reactor for improving medium recovery, belongs to the technical field of wastewater treatment, and solves the problems of microwave energy waste, smaller single-tank wastewater treatment amount, contact agent wastage, difficulty in distinguishing degradation reaction finishing time, incapability of in-situ powerful dissipation of contact agent agglomeration, incapability of timely perceiving contact agent agglomeration, shortage of precautionary measures for water inrush in a quartz chamber, and the like in the prior art. In order to solve the series of problems, the capacity expansion method mainly comprises the following steps: utilizing a metal cage to restrict microwave irradiation air space to facilitate great capacity expansion of the reactor; enabling a bubble flow to release to a main degradation reaction region in a centralized manner; utilizing an external cascade three-stage back-washing filter to intercept contact agents step by step; utilizing ultrasonic waves emitted from the bottom of the reactor to achieve in-situ powerful dissipation of contact agent agglomeration, and meanwhile, cleaning a quartz tube; utilizing an ozone sensor to sense the degradation end point and automatically cutting off a power supply; self-detecting the contact agent agglomeration trend; and the like.

Description

technical field [0001] The invention relates to a method for expanding the capacity of a photocatalytic wastewater degradation reactor with improved medium recovery links, and belongs to the technical field of CO2F wastewater treatment. Background technique [0002] Microwave photocatalytic degradation treatment technology, as an effective harmless treatment technology for industrial wastewater containing organic pollutants, has attracted much attention in recent years. [0003] Regarding the microwave photocatalytic degradation technology, as an example, refer to the Chinese patent application with publication number CN102260003A. [0004] The Chinese patent application with the publication number CN102260003A uses microwaves as the excitation source to excite the electrodeless ultraviolet lamp to emit ultraviolet rays, and irradiates the suspension mixed with photocatalyst titanium dioxide inside the liquid. The electrodeless ultraviolet lamp is shrouded and protected by a...

AI Technical Summary

Problems solved by technology

[0048] Based on the structure of the CN102260003A scheme, the electrodeless ultraviolet lamp is placed in the lumen of the quartz tube. In order to ensure the normal luminous work of the electrodeless ultraviolet lamp, the inner wall of the quartz tube must be kept clean to maintain the permeability to ultraviolet light. Moreover, based on similar light permeability requirements, the outer side of the lamp wall of the electrodeless ultraviolet lamp involved must also be kept clean; however, the structure of the CN102260003A scheme is difficult to avoid the problem of water inrush in the lumen area of ​​the quartz tube The so-called water inrush in this case refers to the unwelcome water in the reactor protruding into the lumen area of ​​the quartz tube; there are generally two reasons for the water inrush: one is the quartz tube The thermal expansion and contraction of the air in the cavity area leads to underpressure in the lumen area of ​​the quartz tube, and the second is that the air in the lumen area of ​​the quartz tube escapes and causes underpressure in the lumen area of ​​the quartz tube. In this way, driven by the relative positive pressure of the surrounding water body, The water in the reactor gradually breaks into the lumen area of ​​the quartz tube, forming a water inrush situation; when the air pump is powered off and the outer surface of the quartz tube is partially or mostly submerged in water, the outburst is especially prone to occur. Water conditions; specifically, the most likely period for this water inrush problem is the following two periods, the first period is when the wastewater to be treated is filled into the reactor and the air pump has not been started, and the second period is After the air pump is turned off and the water extraction procedure has not been completed; when the water inrush situation occurs, the water mixed with many inorganic impurities protruding into the lumen of the quartz tube can easily contaminate the inner wall of the lumen of the quartz tube and the electrodeless ultraviolet lamp The outer surface of its own lamp wall leads to a significant decrease in the ultraviolet light transmittance of the relevant light-transmitting structural parts, which in turn affects the overall wastewater photodegradation treatment efficiency of the relevant wastewater degradation reactor. Therefore, the problem of water inrush should not be avoided. This is Question 15