Deep treatment system and method for reusing drainage water of coal mine for supplemental water of power station boiler

Abstract

The invention discloses a deep treatment system and method for reusing drainage water of a coal mine for supplemental water of a power station boiler. The system comprises a deironing aeration reaction system, a flocculation sedimentation tank, an agent addition system, a clarification water pond, a first-level manganese sand filter, a first-level receiving water tank, a second-level manganese sand filter, a second-level receiving water tank, a ceramic membrane ultrafiltration device, an ultrafiltration water tank, a first-level reverse osmosis agent addition system, a first-level reverse osmosis device, a carbon dioxide removal system, a second-level reverse osmosis alkali addition device, a second-level reverse osmosis device, a second-level fresh water tank, an electrodeionization device, a desalting water tank and a concentrated water recycling system. According to the deep treatment system and method, ferro-manganese, suspended solids, colloid particles and anions and cations in the drainage water of the coal mine can be effectively removed, and the demand for the water quality of the supplemental water of the power station boiler is met.

Description

technical field [0001] The invention relates to the technical field of advanced treatment of wastewater, in particular to an advanced treatment system and method for recycling drained water from coal mines to make-up water for power plant boilers. Background technique [0002] Coal mine drainage water is the sewage gushing out of the coal seam during the coal mining process. Generally, the water quality of coal seam drainage water varies greatly, and the water quality has the characteristics of high iron, high manganese, high suspended solids, and high salt content. At present, the treatment processes of coal mine drainage water reused in thermal power plants implemented in domestic projects mainly include: coagulation clarification + filtration, pretreatment + ultrafiltration + reverse osmosis, pretreatment + first-level desalination + mixed bed, etc., such as the application number It is a Chinese patent of 201710772890.1, but the system generally has poor iron and mangane...

AI Technical Summary

Problems solved by technology

At present, the treatment processes of coal mine drainage water reused in thermal power plants implemented in domestic projects mainly include: coagulation clarification + filtration, pretreatment + ultrafiltration + reverse osmosis, pretreatment + first-level desalination + mixed bed, etc., such as the application number It is a Chinese patent of 201710772890.1, but the system generally has poor iron and manganese removal effects, prominent membrane fouling, and unstable operation

Images