System and method capable of realizing zero discharge of desulfurization wastewater

A desulfurization wastewater, zero-discharge technology, applied in chemical instruments and methods, gaseous discharge wastewater treatment, water/sewage treatment, etc., can solve the problems of high system operation risk, high investment and operation cost of desulfurization wastewater, and ensure continuous and stable operation. , The number of equipment is small, the effect of reducing investment costs

Pending Publication Date: 2020-11-17
BEIJING ZHTD ENVIRONMENTAL PROTECTION TECH CO LTD
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Problems solved by technology

[0007] The purpose of the present invention is to provide a zero-discharge system and method for desulfurization wastewater, so as to at least solve the problems of high investment and operation costs and high system operation risks for desulfurization wastewater

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  • System and method capable of realizing zero discharge of desulfurization wastewater
  • System and method capable of realizing zero discharge of desulfurization wastewater
  • System and method capable of realizing zero discharge of desulfurization wastewater

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Embodiment Construction

[0044] The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0045] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", " The orientations or positional relationships indicated by "top", "bottom", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation, so they cannot be understood as Limitations on the Invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fi...

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Abstract

The invention provides a system and method capable of realizing zero discharge of desulfurization wastewater. The discharge system comprises a pretreatment unit and an evaporation unit, wherein the pretreatment unit is used for reducing the hardness and impurity content of to-be-treated wastewater to obtain pretreated wastewater; the evaporation unit comprises a heat source system, a flash evaporation system and a flue evaporation system, wherein an air outlet of the heat source system communicates with an air inlet of the flash evaporation system, a liquid inlet of the flash evaporation system communicates with a liquid outlet of the pretreatment unit, and an air outlet of the flash evaporation system communicates with an inlet of the flue evaporation system; and the pretreated wastewaterenters the flash evaporation system, is in contact with a heat source provided by the heat source system for countercurrent evaporation, and then is subjected to secondary evaporation in the flue evaporation system. The system provided by the invention can utilize waste heat generated in the desorption process of activated carbon, thereby lowering operating cost and investment cost and ensuring stable operation of the system.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a zero-discharge system and method for desulfurization wastewater. Background technique [0002] With the continuous improvement of national environmental protection requirements, the control of air pollutants represented by sulfur dioxide will directly affect the quality of my country's atmospheric environment. At present, flue gas treatment and resource recovery of rich gas will produce a series of desulfurization wastewater. Due to the high content of suspended solids and fine particles in desulfurization wastewater, it also contains secondary pollutants such as copper, zinc, fluoride, and sulfide, as well as heavy metal ions such as cadmium, mercury, chromium, lead, and nickel. It is highly polluting. [0003] The desulfurization wastewater treatment method currently mainly adopts chemical precipitation method to remove desulfurization wastewater pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F11/122C02F103/18
CPCC02F1/06C02F1/16C02F1/5236C02F1/56C02F1/66C02F9/00C02F11/122C02F2001/007C02F2103/18
Inventor 苏荣荣刘国锋李转丽
Owner BEIJING ZHTD ENVIRONMENTAL PROTECTION TECH CO LTD
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