Desulphurization waste water secondary softening descaling and sludge recycling technology

Abstract

The invention discloses a desulphurization waste water secondary softening descaling and sludge recycling technology. An adopted equipment comprises a first grade reaction tank, a second grade reaction tank, a first medicine adding system, a second medicine adding system, a stirring machine, a sludge transfer pump, a sludge reflux pump, and a sludge processing system; the upper end of the first grade reaction tank is communicated with the first medicine adding system, and the lower end of the first grade reaction tank is communicated with the sludge transfer pump; the upper end of the second grade reaction tank is communicated with the second medicine adding system, and the lower end of the second grade reaction tank is communicated with the sludge reflux pump; an outlet of the sludge reflux pump is provided with a sludge reflux pipe; one end of the sludge reflux pipe is connected with the sludge processing system. The technology and the equipment are capable of realizing reducing calcium magnesium hardness of desulphurization waste water with high efficiency, realizing utilization of generated sludge effectively, saving raw materials, and increasing economic benefit.

Description

technical field [0001] The invention relates to the technical field of desulfurization wastewater treatment, in particular to a secondary softening and descaling and sludge reuse treatment process for desulfurization wastewater. Background technique [0002] my country is the world's largest coal producer and consumer. Coal accounts for 76.2% of China's energy structure, and 90% of my country's sulfur dioxide emissions come from coal combustion. In recent years, although my country has adopted a sewage charge policy, the annual sulfur dioxide emissions still exceed 20 million tons, and the area polluted by acid rain has rapidly expanded, causing huge damage to crops, forests, soil and human health in my country, and has also become a constraint for my country. It is an important factor for the sustainable development of economy and society. Therefore, the control of sulfur dioxide emission is imperative. Flue gas desulfurization is currently the only large-scale commercial a...

AI Technical Summary

Problems solved by technology

In recent years, although my country has adopted a sewage charge policy, the annual sulfur dioxide emissions still exceed 20 million tons, and the area polluted by acid rain has rapidly expanded, causing huge damage to crops, forests, soil and human health in my country, and has also become a constraint for my country. An important factor for sustainable economic and social development, therefore, the control of sulfur dioxide emissions is imperative

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