Wet desulphurization wastewater treatment device for limestone and gypsum

Abstract

The invention relates to a wet desulphurization wastewater treatment device for limestone and gypsum. The wet desulphurization wastewater treatment device for limestone and gypsum is characterized by comprising a sedimentation system, an ultrafiltration system, a reverse osmosis system, a cleaning device (23) and a washing device (24), wherein the sedimentation system comprises a wastewater setting tank (1), a water suction pump (19) and a filter (20); the ultrafiltration system comprises a tubular ultrafiltration film device (2), an ultrafiltration circulation pump (3), a pressure gauge (21), a flow meter (22) and an ultrafiltration circulation bucket (4); and the reverse osmosis system comprises a first-stage reverse osmosis system and a second-stage reverse osmosis system. According to the wet desulphurization wastewater treatment device for limestone and gypsum disclosed by the invention, particulate matters, macromolecular substances and the like in wastewater are removed via a tubular ultrafiltration film, and heavy metal ions, fluoride ions and chloride ions in the wastewater are removed via a reverse osmosis film; effective desulphurization recovery treatment can be performed on wastewater which has strong corrosion, and contains high-concentration heavy metal ions, and the like; and the equipment is small in floor area, and low in operation and maintenance costs.

Description

technical field [0001] The invention relates to a limestone and gypsum wet desulfurization wastewater treatment device, which is mainly used for the treatment of limestone-gypsum desulfurization wastewater with strong corrosion and high concentration of heavy metals. The invention belongs to the technical field of waste water treatment. Background technique [0002] In recent years, with the large-scale construction of the steel industry, SO produced during sintering and pellet production 2 Accounting for more than 60% of the production system of iron and steel enterprises, controlling SO in the process of sintering and pellet production 2 emissions have become the control focus of iron and steel enterprises. [0003] As a mature and stable desulfurization technology, wet limestone-gypsum desulfurization technology has been widely used in thermal power plants and also favored by iron and steel enterprises, becoming one of the key promotion technologies for energy saving an...

AI Technical Summary

Problems solved by technology

In order to prevent the enrichment of chloride ions from corroding the desulfurization equipment, a small amount of wastewater must inevitably be produced during the wet desulfurization process. This type of wastewater is high in chlorine and salt, rich in heavy metals, and is not suitable for centralized treatment in the wastewater pipe network of steel mills. It is also not suitable for centralized treatment in urban wastewater treatment systems, and the investment cost for centralized treatment of outbound transportation is high, so it is imperative to equip suitable wastewater treatment devices in the desulfurization system

[0004] At present, the most widely used method for desulfurization wastewater is the traditional chemical dosing method. This method has a complex process, a large equipment footprint, and high operation and maintenance costs. The most critical thing is that the throttling rate of ions in this process is not high. The effluent can only be discharged and cannot be returned to the desulfurization system for reuse

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