Filtrating and squeezing process and system for desulphurization wastewater

Abstract

The invention relates to a process and a system for filtering and squeezing wastewater. The system comprises a sludge inlet system, a sludge blow-drying system, a septum squeezing system, a filter cloth cleaning system and a matched electric control system. An outlet of a wastewater pool is communicated with a feed inlet of a feed pump through a feed conveying pipe; a discharge port of the feed pump is respectively communicated with feed inlets at two sides of a filter press through the feed conveying pipe and a feed valve; an outlet of an air compressor is communicated with an air inlet of an air storage tank; an air outlet of the air storage tank is respectively communicated with an air inlet of the filter press through an air pipe and a back flushing valve; the feed conveying pipe between the feed valve and the filter press is provided with a pressure sensor; the signal end of the pressure sensor is connected with the signal end of a PLC controller; an inlet of a press pump is connected with a water storage tank; and an outlet of the press pump passes through a squeezing pipeline and is connected with a main squeezing pipe of the filter press through a tee valve. The process and the system have the following advantages: 1, the process and the system have time conservation, high efficiency and low energy consumption; and 2, the process and the system can effectively squeeze out moisture remained in a filter cake, completely carry out back flushing on materials in a feeding pipeline to a material pool and achieve the aims of cleanness and smoothness of the pipeline.

Description

technical field [0001] The invention relates to a desulfurization waste water filtration process and system, belonging to the field of waste water filtration process and power plant desulfurization process manufacturing. Background technique [0002] my country is the largest coal producer and consumer in the world, and the proportion of coal in China's energy structure is as high as 76.2%. 2 90% comes from burning coal. In recent years, the area of ​​acid rain pollution in my country has expanded rapidly, causing huge damage to crops, forests and human health in my country, and has also become an important factor restricting the sustainable development of my country's economy and society. Therefore, the SO 2 Emission control is imperative. At present, the limestone-gypsum method is widely used in the boiler flue gas wet desulfurization method, and the wastewater generated by the limestone / gypsum method mainly comes from the gypsum dehydration and cleaning system. The im...

AI Technical Summary

Problems solved by technology

However, because the solid components in the desulfurization wastewater are difficult to filter, the filter cloth becomes blocked after several times of filtration and becomes invalid. The moisture content of the filter cake after filtration is high, which affects the transportation.

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