Desulfurization waste water evaporator with inert carrier circling and method

Abstract

The invention discloses a desulfurization waste water evaporator with inert carrier circling and method. A heater, a solid-liquid mixing device connected with the upper portion of the heater, a solid-liquid separator connected with a discharging port formed in the lower portion of the heater, a gas-liquid separator connected with an upper liquid outlet port of the solid-liquid separator and a circulation pump connecting the gas-liquid separator and the solid-liquid separator, a density gauge is connected with the side face of the gas-liquid separator to regulate the discharging of concentratedliquid, a liquid level gauge is arranged on the side face of the gas-liquid separator to regulate the inlet of desulfurizing waste water, a concentration liquid outlet port is formed in the lower portion, a circulation water outlet is formed in the side face to be connected with the circulation pump, the gathering with inert carriers is achieved through the solid-liquid mixing device, and waste water and the inert carriers enter the heating device together. According to the evaporator, the inert carriers enter the solid-liquid mixing device from the lower end, waste water continuously entersthe gas-liquid separator, and evaporated gas is discharged from a gas discharging hole. The problem of inner scale forming of the evaporator is thoroughly solved, the investment cost is low, the operation is stable, and there exists no environmental secondary pollution.

Description

technical field [0001] The invention relates to an evaporation treatment device for desulfurization wastewater, in particular to an evaporator for avoiding fouling of desulfurization wastewater. Background technique [0002] Desulfurization wastewater is the terminal wastewater of the power plant. The water quality is poor. The type of coal fired, the desulfurization process, the water quality and the discharge cycle will directly affect the pollution components of the wastewater. It is easy to scale and block, and at the same time, the sulfur and chlorine in the coal are transferred to the desulfurization wastewater, forming a high concentration of SO4 2- , Cl - , is a typical high-salt wastewater, which will cause serious corrosion to equipment and pipelines, and also makes it impossible for desulfurization wastewater to be biochemically treated to meet the reuse water standard, and can only be treated by physical means. [0003] At present, in order to achieve zero disc...

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Problems solved by technology

[0005] (1) Forced circulation mainly depends on the liquid flow rate to wash away the scale on the pipe wall. Usually, high speed is required to have some effect. In this case, the pump head needs to be large and the power consumption is also large.

[0006] (2) The fouling problem still exists, causing the pipe to be blocked, and the cleaning period is usually half a month or a month, so that the evaporator cannot be operated continuously, and it is very difficult to clean up, the labor intensity is high, the production capacity is reduced, and it is economically uneconomical

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