Expansion method of photocatalytic wastewater degradation reactor to prevent water inrush in lamp area

Abstract

The invention relates to a method for expanding a photocatalytic wastewater degradation reactor for resisting water burst in a lamp zone and belongs to the technical field of wastewater treatment. The problem that water bursts in a tube cavity of a quartz tube, namely an electrodeless lamp accommodating cavity and the problems that the microwave energy is wasted, the single-pot wastewater treatment amount is small, the catalytic agent is lost, the degradation endpoint is difficultly distinguished, a magnetron is corroded by reverse channeling of secondary ozone and the like exist in the existing related technology, and the scheme aims to solve the series of problems. According to the scheme, the method mainly comprises the following steps: connecting a micro diaphragm pump used for supplementing air in a normal state at low power consumption and low flow to an air channel communicated with the tube cavity of the quartz tube in a bypass mode; separating the microwave irradiation area; expanding the size of the reactor, gradually intercepting the catalyst particles by employing an external cascade filter; sensing the reaction process by employing an ozone sensor, and immediately closing the related power supply when the degradation endpoint is reached; and separating a waveguide tube by employing a wave-transparent airtight separation plate so as to prevent the reverse flow of secondary ozone from corroding the magnetron.

Description

technical field [0001] The invention relates to a method for expanding the capacity of a photocatalytic wastewater degradation reactor for preventing water inrush in a lamp area, 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 protect...

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 sixteen