Sewage-refuse treatment clean-production system at the center of generating plant

Abstract

This sewage and garbage treatment system centrally designed for power plant includes sewage treatment unit, fuel processing unit, garbage combustion boiler, fly ash processing unit, smoke processing unit, the de-oxygenating draining steam of turbine steam-extraction heat-supply boiler and circulated water cooling unit. The effluent of sewage treatment unit with coal as filter is led into magnetic water strainer, and condensed water from the domestic garbage dehydration-drying condensed water-recovering combustion-supporting device is cleared by the coal filtration and normal water treatment system to feedback the circulated water-cooling system, the steam condensed water is heated and delivered into the de-oxygenating device. Treated sewage is introduced into multi-medium condenser and the distillation-desalination device; discharged smoke from fly ash incineration device is led into garbage combustion boiler; acid water discharged from distillation unit and alkaline water from coal filter are neutralized and discharged. Water distillation system and the circulation cooling water of the steam turbine condensator are led to the air- water cooling tower.

Description

Technical field [0001] The invention is a sewage garbage treatment clean production system centered on a power plant, and relates to a sewage treatment device using coal as a filter material. A method and device for separating and extracting sulfur dioxide and other gases from flue gas, using the flue gas to process and heat water, and producing steam. Hot gas heating thermosiphon circulation submerged tube multi-effect evaporation desalination device. Hot gas heating thermosiphon circulation evaporator surface film multi-effect distillation desalination device. Combustion-supporting device for domestic waste dehydration, drying and recovery of condensed water tail gas. A method and device for calcining and removing dioxin-containing fly ash from a waste incineration boiler. Air-cooled and cold-water composite cooling towers and other device systems belong to the field of energy and environmental protection. Background technique [0002] With the development of my countr...

AI Technical Summary

Problems solved by technology

However, the filter materials for the above two kinds of raw water are used when the water quality of the raw water is relatively good, the amount of dirt in the filtered water is not large enough, and the operation cycle is relatively short. Therefore, for pathogenic bacteria, organic matter, The filtration rate of some undesirable substances such as heavy metals is low

However, the conventional domestic sewage treatment system has high water treatment costs and poor water quality, and its sediment contains a large number of pathogenic bacteria and toxic substances, which makes the sludge cause secondary pollution.

[0004] However, because the current way of domestic waste treatment is through landfill and waste incineration for power generation, landfill occupies a large amount of land and the existence of its leachate has seriously polluted groundwater and the surrounding environment, while waste incineration for power generation A large amount of fly ash containing dioxin poisons will be produced, causing serious secondary pollution to the environment. Known waste incineration boilers will produce a large amount of fly ash containing dioxin poisons, and dioxin poisons are difficult to produce under normal temperature conditions. Decomposed, this poison has seriously formed the secondary pollution of the environment

[0005] The conditions for producing dioxins in waste incineration are: (1) unstable combustion

(2) Furnace combustion temperature is not uniform

Due to the high temperature of the air dry bulb, the small specific heat, limited heat absorption capacity, and low cooling efficiency, the air cooler needs to have a large surface area, which makes the air cooler cost high and severely restricts its promotion.

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