CN-121974512-A - High-efficiency multiphase Fenton catalytic reaction system based on quartz refractory wastewater and application thereof

CN121974512ACN 121974512 ACN121974512 ACN 121974512ACN-121974512-A

Abstract

The invention discloses a high-efficiency multiphase Fenton catalytic reaction system based on quartz refractory wastewater, which sequentially comprises a water inlet tank, a catalytic reduction tower, a multiphase Fenton catalytic oxidation tank, a neutralization degassing tank, a flocculation tank and an inclined plate sedimentation tank along the wastewater treatment direction, wherein micro-electrolysis fillers are loaded at the bottoms of the catalytic reduction tower and the multiphase Fenton catalytic oxidation tank, aeration pipes are arranged at the bottoms of the catalytic reduction tower and the multiphase Fenton catalytic oxidation tank, and the catalytic reduction tower and the multiphase Fenton catalytic oxidation tank are connected with the aeration pipes through the aeration pipes to provide air sources for the catalytic reduction tower and the multiphase Fenton catalytic oxidation tank. According to the invention, a catalytic reduction process is added before Fenton oxidation, so that the stable macromolecular organic matters in the wastewater in the quartz industry are subjected to chain scission and then thorough oxidation, the average removal rate of COD is stabilized to be more than 50%, the high-efficiency and deep removal of the degraded organic matters in the wastewater is realized, the dosage of a medicament is reduced, and the sludge yield is reduced.

Inventors

LIN HONGFEI
LI RUOFEI
XIE CHUNMIN
MO WENXU
LI SANPO
CHEN QIANLING
SU LIU
LIU XI
QIN SIYUE
CHEN SHUKE
ZHAN LONGHUI
ZHU HONGXIANG

Assignees

广西博世科环保科技股份有限公司
广西环保产业发展研究院有限公司

Dates

Publication Date: 20260505
Application Date: 20260122

Claims (9)

1. A high-efficiency multiphase Fenton catalytic reaction system based on quartz refractory wastewater is characterized by sequentially comprising a water inlet tank, a catalytic reduction tower, a multiphase Fenton catalytic oxidation tank, a neutralization degassing tank, a flocculation tank and an inclined plate sedimentation tank along the wastewater treatment direction; the bottoms of the catalytic reduction tower and the multiphase Fenton catalytic oxidation pond are respectively provided with micro-electrolysis filler; The bottoms of the catalytic reduction tower and the multiphase Fenton catalytic oxidation pond are provided with aeration pipes, and the aeration pipes are connected with the aeration pipes through the aeration pumps to provide air sources for the catalytic reduction tower and the multiphase Fenton catalytic oxidation pond.
2. The efficient multiphase Fenton catalytic reaction system based on the quartz refractory wastewater, according to claim 1, wherein the catalytic reduction tower is formed by connecting a single-stage reduction tower or a multistage reduction tower in series.
3. The high-efficiency multiphase Fenton catalytic reaction system based on the quartz refractory wastewater, according to claim 2, wherein the micro-electrolysis filler comprises iron, carbon, a noble metal catalyst and a surfactant.
4. The efficient multiphase Fenton catalytic reaction system based on the quartz refractory wastewater, according to claim 2, wherein the surfactant is sodium tripolyphosphate, sodium dodecyl benzene sulfonate and N, N-dimethyl ammonium formate, and the mass ratio of the surfactant to the N-dimethyl ammonium formate is 3-5:10-12:2-3.
5. A method for treating refractory quartz wastewater using the system of any of claims 1-4, comprising the steps of: (1) Placing micro-electrolysis filler at the bottoms of a catalytic reduction tower and a multiphase Fenton catalytic oxidation pond; (2) Temporarily storing the wastewater in a water inlet tank, adjusting the pH value by sulfuric acid, and then conveying the wastewater to a water inlet of a catalytic reduction tower; (3) Aeration is carried out by adopting an aeration pump at the bottom of the catalytic reduction tower; (4) The wastewater after catalytic reduction treatment is subjected to catalytic oxidation reaction by a multiphase Fenton catalytic oxidation pond; (5) The wastewater treated by the multiphase Fenton catalytic oxidation pond enters a neutralization degassing pond, and alkaline solution is added to adjust the pH to be neutral or alkalescent; (6) The water treated by the neutralization degassing tank enters a flocculation tank for treatment; (7) The effluent treated by the flocculation tank enters an inclined plate sedimentation tank, and a water outlet of the inclined plate sedimentation tank collects water samples for analysis and detection.
6. The method according to claim 5, wherein in the step (2), the pH is adjusted to 2.5 to 2.6.
7. The method of claim 5, wherein the micro-electrolytic filler comprises iron, carbon, a noble metal catalyst, and a surfactant, and has a particle size of 2-3cm.
8. The method according to claim 5, wherein the multiphase Fenton catalytic oxidation tank is added with hydrogen peroxide and ferrous sulfate, the mass concentration of the hydrogen peroxide is 27.5%, the mass concentration of the ferrous sulfate is 10%, and the alkaline solution added into the neutralization degassing tank is sodium hydroxide with the mass concentration of 30%.
9. The method of claim 7, wherein the carbon is graphene or coke.

Description

High-efficiency multiphase Fenton catalytic reaction system based on quartz refractory wastewater and application thereof Technical Field The invention relates to the technical field of wastewater treatment, in particular to a high-efficiency multiphase Fenton catalytic reaction system based on quartz refractory wastewater and application thereof. Background Industrial waste water produced by deep processing of quartz sand, especially quartz sand, usually contains a large amount of quartz sand particles, suspended matters, acid-base or other pollutants and chemical oxygen demand, contains complex organic matters, multiple bonds, high carbon chains, azo pollutants and the like, and currently, the waste water in the quartz industry mainly comprises a physical adsorption method, a chemical precipitation method and a high-grade oxidation method, and the common biochemical treatment process has low degradation efficiency and is difficult to reach increasingly strict emission standards. Fenton oxidation refers to homogeneous catalytic reaction of ferrous ions and hydrogen peroxide under acidic conditions to generate hydroxyl free radicals with strong oxidability, and the hydroxyl free radicals directly oxidize and decompose organic pollutants in water into CO 2 and water, but the Fenton technology has the following defects that (1) a large amount of iron mud is generated after the homogeneous reaction to cause secondary pollution, the sludge disposal cost is high, (2) the ring-opening and chain breaking capacity of complex macromolecular pollutants is limited, the oxidation efficiency is incomplete, the consumption of a medicament is high, the operation cost is high, and (4) the water-resistant impact load capacity is weak. In the prior art, there are attempts to combine catalytic reduction and oxidation, but there are generally complicated process flows and unstable catalytic efficiency. Aiming at the problems of poor adaptability of wastewater in quartz industry, in particular wastewater containing specific silicide and organic additives, and the like. Therefore, development of a deep treatment technology which is efficient, stable, low in operation cost and particularly suitable for the water quality characteristics of the quartz industry is needed. Disclosure of Invention The invention aims to solve the technical problems of overcoming the defects of the prior art, solving the problem of poor adaptability in the wastewater treatment process in the quartz industry, solving the problems of secondary pollution, thorough oxidation and large medicament consumption in the traditional Fenton oxidation, and providing a high-efficiency multiphase Fenton catalytic reaction system based on the wastewater difficult to degrade in quartz and application thereof based on the conditions. In order to achieve the above purpose, the present invention adopts the following technical scheme: a high-efficiency multiphase Fenton catalytic reaction system based on quartz refractory wastewater sequentially comprises a water inlet tank, a catalytic reduction tower, a multiphase Fenton catalytic oxidation tank, a neutralization degassing tank, a flocculation tank and an inclined plate sedimentation tank along the wastewater treatment direction; the bottoms of the catalytic reduction tower and the multiphase Fenton catalytic oxidation pond are respectively provided with micro-electrolysis filler; The bottoms of the catalytic reduction tower and the multiphase Fenton catalytic oxidation pond are provided with aeration pipes, and the aeration pipes are connected with the aeration pipes through the aeration pumps to provide air sources for the catalytic reduction tower and the multiphase Fenton catalytic oxidation pond. Preferably, the catalytic reduction tower is formed by connecting a single-stage reduction tower or a plurality of stages of reduction towers in series. Preferably, the micro-electrolysis filler comprises iron, carbon, a noble metal catalyst and a surfactant. Preferably, the surfactant is sodium tripolyphosphate, sodium dodecyl benzene sulfonate and N, N-dimethyl ammonium formate, and the mass ratio of the surfactant to the N, N-dimethyl ammonium formate is 3-5:10-12:2-3. The invention also provides a method for treating the quartz refractory wastewater by adopting the system, which comprises the following steps: (1) Placing micro-electrolysis filler at the bottoms of a catalytic reduction tower and a multiphase Fenton catalytic oxidation pond; (2) Temporarily storing the wastewater in a water inlet tank, adjusting the pH value by sulfuric acid, and then conveying the wastewater to a water inlet of a catalytic reduction tower; (3) Aeration is carried out by adopting an aeration pump at the bottom of the catalytic reduction tower; (4) The wastewater after catalytic reduction treatment is subjected to catalytic oxidation reaction by a multiphase Fenton catalytic oxidation pond; (5) The wastewater treated by the multiphase Fent