Direct contact evaporation treatment equipment and method using flue gas heat

Abstract

The present invention provides a direct contact evaporation treatment apparatus and method by utilizing flue gas heat, wherein the apparatus comprises: a first evaporator, which provided with a firstfeed port, a first discharge port, a first gas inlet and a first gas outlet, wherein the first gas inlet is used for receiving high temperature flue gas, and the first gas outlet is connected to an incinerator; a second evaporator, which is provided with a second feeding port, a second discharging port, a second air inlet and a second air outlet, wherein the second gas inlet is used for receivinghigh-temperature flue gas, the second feeding port is connected with the first discharging port and used for receiving a first-stage concentrated solution formed by evaporating to-be-treated liquid inthe first evaporator from the first evaporator, and the second exhaust port is connected with a flue gas treatment system of the incinerator or directly leads to the outside atmosphere. Unified treatment of two secondary pollution sources of high-temperature flue gas and high-salinity wastewater is achieved, the effect of treating waste with waste is achieved, consumption of combustible gas is reduced, and the treatment cost of high-salinity water is reduced.

Description

technical field [0001] The invention relates to the technical field of high-salt organic waste liquid treatment for environmental protection, in particular to a direct-contact evaporation treatment equipment and method using flue gas heat. Background technique [0002] With the increasingly stringent environmental protection laws and regulations in my country and the gradual improvement of discharge standards, more and more high-salt wastewater is produced in the process of wastewater treatment, such as membrane concentrate of landfill leachate, residual high-salt water in hazardous waste treatment, etc. Because usually high-salt wastewater contains high concentrations of organic pollutants, heavy metals, and calcium ions that are easy to scale, it is difficult to treat. [0003] High-salt wastewater usually contains a large amount of easily degradable and refractory organic pollutants, as well as calcium and magnesium ions, which lead to the volatilization of organic matter...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN1278963C discloses a two-stage treatment method of evaporative incineration and evaporative concentration of landfill leachate, which has achieved good application results in practice, but when the source of landfill gas as combustible gas is limited, it needs to consume Commodity fuels such as biogas or natural gas replace landfill gas, resulting in high operating costs and a large amount of energy consumption, and the application in areas lacking gas supply is also greatly limited

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