Boiler fuel gas waste heat desulfurization waste water coupling, evaporating and concentrating system

A technology for desulfurization wastewater and boiler flue gas, which is applied in the direction of gaseous effluent wastewater treatment, heating water/sewage treatment, multi-stage water treatment, etc. It can solve the problems of high maintenance cost, high operation and maintenance cost, and complex system, and achieve Improve utilization, save investment and operating costs, and reduce energy consumption

Pending Publication Date: 2017-11-07
北京尤科恩环保工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a large amount of chemicals are required for wastewater treatment, and the system is complex, with high operation and maintenance costs (about 45 yuan / ton of wastewater), and regular replacement of membranes (usually every 2-3 years) and high maintenance costs

Method used

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  • Boiler fuel gas waste heat desulfurization waste water coupling, evaporating and concentrating system

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Embodiment Construction

[0029] The principles and features of the present invention will be described more fully below with reference to the accompanying drawings and examples. This invention may be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein.

[0030] For ease of description, spatially relative terms such as "upper", "lower", "left", "right", etc. may be used herein to describe the relationship of one element or feature to another element or feature shown in the figures. . It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an orientation of above and below. The device...

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Abstract

The invention discloses a boiler fuel gas waste heat desulfurization waste water coupling, evaporating and concentrating system. The system comprises a flue heat exchanger, an evaporator group, a tail gas condenser and a tail gas condensation tank, wherein a desulfurization waste water pipeline is sequentially connected with the evaporator group, the tail gas condenser and the tail gas condensation tank, and a flue heating system is connected with the evaporator group; the flue heat exchanger is arranged in a boiler fuel gas emission channel, and desulfurization waste water in the evaporator group is heated by utilizing fuel gas waste heat; the evaporator group comprises at least one group of evaporators, each group of evaporators include a heater, a circulating pump and a separator which are connected into a ring through a pipeline, the flue heat exchanger is connected with the heater, and a vapor outlet and a concentrated liquid outlet are formed in the separator; the tail condenser cools and condenses the evaporated vapor; and the tail condensation tank stores and delivers condensed water into a finished water tank. According to the system, no chemicals are added during the concentration process of the desulfurization waste water, the distilled clean water is recycled, and the water recovery rate of the desulfurization waste water treatment system is greater than 90%.

Description

technical field [0001] The invention relates to the technical field of desulfurization wastewater treatment in thermal power plants, in particular to a boiler flue gas residual heat coupling evaporation concentration desulfurization wastewater system. Background technique [0002] In the limestone-gypsum wet boiler flue gas desulfurization system of a large-scale thermal power plant, in order to ensure the desulfurization efficiency and maintain the balance of chloride ions in the system, part of the desulfurization wastewater needs to be discharged. Because the wastewater contains a large amount of dissolved salts, suspended solids, and a small amount of harmful pollutants such as fluoride ions and heavy metal ions, it cannot be discharged directly, and it has become one of the most difficult wastewater to treat in coal-fired power plants. At present, the commonly used desulfurization wastewater treatment process is to use chemical treatment methods to flocculate, settle an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/06C02F1/16C02F103/18
CPCC02F1/048C02F1/06C02F1/16C02F2301/08C02F2103/18
Inventor 乔秀丽王艳平何立荣沈青詹仰东崔金峰
Owner 北京尤科恩环保工程有限公司
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