Circulating fluidized bed advanced treatment equipment for industrial wastewater

Abstract

The invention discloses circulating fluidized bed advanced treatment equipment for industrial wastewater. The equipment comprises a tank body for the Fenton oxidation reaction of wastewater, wherein the tank body is divided into a circulating water distribution zone, a FeOOH crystallization zone and a gas-water separation zone from bottom to top in turn; the circulating water distribution zone is provided with a water distributor and a circulating water inlet; the circulating water inlet is connected with the output ends of a FeSO4 dosing pump, a H2O2 dosing pump and a circulating pump simultaneously; the FeOOH crystallization zone is provided with a crystal bed layer, a solid discharge pipe and a circulating water outlet; the circulating water outlet is connected with the input end of the circulating pump; the gas-water separation zone is provided with a gas-water separation barrel, a wastewater input pipe extending to the gas-water separation barrel, a gas discharge pipe, an annular effluent weir and a purified water discharge pipe; and the wastewater input pipe is connected with the output end of an influent pump. The equipment has the characteristics of low operating cost, low sludge yield and good treatment effect, is flexibly and conveniently operated, and is particularly suitable for the industrial wastewater containing non-degradable organic matters.

Description

technical field [0001] The invention relates to equipment for reprocessing industrial wastewater that cannot meet discharge requirements after conventional physical, chemical and biochemical treatments, in particular to a circulating fluidized bed advanced treatment equipment for industrial wastewater. Background technique [0002] In industrial wastewater treatment projects in some special industries, it is difficult to achieve the expected treatment effect only by using traditional physical, chemical and biochemical methods. There is still a certain amount of refractory organic matter remaining in the wastewater, which cannot meet the requirements of environmental protection discharge. For this reason, it is necessary to further use strong oxidants to react with high-molecular organic matter in wastewater, and oxidize high-molecular refractory organic matter into small molecular substances, so as to improve their biochemical properties and facilitate the subsequent biologic...

AI Technical Summary

Problems solved by technology

However, in the traditional Fenton oxidation equipment, the pH value of the feed water has been adjusted to 3-4 by adding acid, and excessive H 2 o 2 and Fe 2+ To maintain the treatment effect, it has the following defects: on the one hand, the dosage is too large, H 2 o 2 The utilization rate is low, on the other hand, the amount of sludge discharged is large, and the cost of wastewater treatment is high

At the same time, due to the need to add acid and alkali at any time to adjust the pH value of the wastewater, the operation is too cumbersome, resulting in low equipment operation efficiency

Especially for low-concentration organic wastewater that is difficult to biodegrade, the above defects are more obvious, which seriously restricts the popularization and application of Fenton oxidation method

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