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Method and device for realizing zero release in desulfuration wastewater deepening treatment

A technology for desulfurization wastewater and zero discharge, applied in chemical instruments and methods, multi-stage water/sewage treatment, heating water/sewage treatment, etc., can solve problems such as high price, immature steam compressor technology, and high equipment investment cost , to achieve the effects of not being easily entrained, ensuring long-term normal operation, and high quality secondary steam

Active Publication Date: 2012-02-08
CHINA HAISUM ENG
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  • Application Information

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Problems solved by technology

But this set of equipment is extremely expensive, and the equipment investment cost is large
The steam compressor technology used in this system is not mature enough in China. At present, there is no domestic mechanical steam compressor used for this processing method.

Method used

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  • Method and device for realizing zero release in desulfuration wastewater deepening treatment
  • Method and device for realizing zero release in desulfuration wastewater deepening treatment
  • Method and device for realizing zero release in desulfuration wastewater deepening treatment

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Embodiment

[0020] A device for deep treatment of desulfurization wastewater to realize zero discharge, which is composed of a four-effect evaporation system and a salt drying system. like figure 1 Shown is a schematic diagram of a four-effect evaporation system for the deepening treatment of desulfurization wastewater. The four-effect evaporation system consists of a waste liquid storage tank 1, a first preheater 2, a second preheater 3, a third preheater 4, a fourth preheater 5, a degasser 6, and an I-effect evaporation system. 7, II effect evaporator 8, III effect evaporator 9, IV effect evaporator 10, surface condenser 12, water ring vacuum pump 13, separator 14 and condensed water tank 15. like figure 2 Shown is a schematic diagram of the salt drying system for the deepening treatment of desulfurization wastewater. The salt drying system is composed of a centrifuge 16, a feeder 17, a vibrating fluidized bed dryer 18, an intermediate silo 19, a packaging machine 20, a cyclone sepa...

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Abstract

The invention provides a method and a device for realizing zero release in desulfuration wastewater deepening treatment. The device comprises a waste liquid storage tank, a pre-heater, a degasser, a I-effect evaporator, a II-effect evaporator, a III-effect evaporator, a IV-effect evaporator, a centrifuge, a feeder, a vibrating fluidized bed dryer, an intermediate bunker and a packer which are connected in turn. The method comprises the following steps of: pre-heating and degassing the desulfuration wastewater; and conveying the desulfuration wastewater to the centrifuge to perform solid-liquid separation after four-level evaporation, and drying the solid. The invention has the advantages that the device is simple and the cost is low.

Description

technical field [0001] The invention discloses a method and device for deep treatment of desulfurization wastewater to realize zero discharge, which is used for further treatment of desulfurization wastewater after pretreatment in power plants and smelters to realize zero discharge of wastewater, and belongs to the technical field of desulfurization wastewater deep treatment methods . Background technique [0002] my country is the largest coal producer and consumer in the world, and the proportion of coal in China's energy structure is as high as 76.2%. 2 90% comes from burning coal. SO 2 The acid rain pollution caused by the discharge of pollutants has caused great damage to our country's crops, forests and human health. [0003] Flue gas wet desulfurization (limestone / gypsum method) is currently the most widely used flue gas desulfurization method. The desulfurization wastewater generated in this process comes from the discharge water of the absorption tower. At pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F1/04
Inventor 张裕福赵云松陈位兵庞建国朱玉娟
Owner CHINA HAISUM ENG
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