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Desulfurization wastewater zero-discharge treatment system and method

A technology for desulfurization wastewater and treatment system, which is applied in energy wastewater treatment, gaseous discharge wastewater treatment, multi-stage water treatment, etc., to reduce the amount of medium-pressure steam, increase added value, and save costs.

Active Publication Date: 2020-08-28
SHANDONG JIANZHU UNIV
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Problems solved by technology

[0010] In order to overcome the shortcomings of the existing desulfurization wastewater treatment process in power plants, the present invention provides a zero-discharge treatment system and treatment method for desulfurization wastewater

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  • Desulfurization wastewater zero-discharge treatment system and method

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Embodiment Construction

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0023] figure 1 A structural diagram of a zero-discharge treatment system for desulfurization wastewater is shown. In the figure, this desulfurization wastewater zero-discharge treatment system includes a wastewater pretreatment system, a magnesium salt separation system, and an evaporation crystallization system. The wastewater pretreatment system includes a pretreatment pool 1 and a primary filter device 2. The feed port is connected to the feed pump 1a, and the discharge port at the lower right part of the pretreatment tank 1 is connected to the feed port of the primary filter device 2 through the first liquid delivery pump 1b;

[0024]The magnesium salt separation...

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Abstract

The invention discloses a desulfurization wastewater zero-discharge treatment system and method, and belongs to the field of wastewater treatment and wastewater resource utilization. The desulfurization wastewater zero-discharge treatment system comprises a wastewater pretreatment system, a magnesium salt separation system and an evaporative crystallization system, and the system adopts an evaporation process of coupling a two-stage horizontal pipe evaporator and a vertical pipe evaporator, so that the cyclic utilization of steam is realized, the energy consumption of wastewater evaporation isgreatly reduced, and the energy is saved. According to the treatment method of the desulfurization wastewater zero-discharge treatment system, an ammonium carbonate reagent is added, so that calciumions and other heavy metal ions in the wastewater are removed, and magnesium ions in the wastewater can be recycled, thereby improving the additional value of wastewater treatment. By adding a chemical agent, crystalline salt in the subsequent evaporation process is guaranteed to be single-component and reusable ammonium sulfate, and the technical problem that solid waste is difficult to treat ina traditional wastewater treatment process is solved.

Description

technical field [0001] The invention relates to a zero-discharge treatment system and treatment method for desulfurization wastewater, belonging to the fields of wastewater treatment and wastewater resource utilization. Background technique [0002] As the main fossil fuel for thermal power generation in my country, coal will produce a large amount of sulfur-containing flue gas during the combustion process. Direct emission of flue gas can easily cause acid rain and air pollution. Therefore, it is necessary to desulfurize the flue gas. At present, the process of flue gas desulfurization system mostly adopts limestone-gypsum wet desulfurization method. The wastewater produced by wet desulfurization has the characteristics of high suspended solids content, high salinity, high content of scaling ions such as calcium and magnesium, and high content of COD. The treatment of desulfurization wastewater has become the focus and difficult problem of power plant wastewater treatment. ...

Claims

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Application Information

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IPC IPC(8): C02F9/10C01C1/24C01F5/06C02F103/18
CPCC02F9/00C01C1/24C01F5/06C02F2103/18C02F1/001C02F1/04C02F1/5236C02F1/56C02F2301/08Y02W10/37
Inventor 杨洛鹏张林华曲云霞李安桂
Owner SHANDONG JIANZHU UNIV
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