Power plant desulfurization wastewater treatment system

A desulfurization wastewater and treatment system technology, applied in the direction of gaseous effluent wastewater treatment, water/sewage treatment, heating water/sewage treatment, etc., can solve the problems of large water ratio, limited amount of hot slag, and affecting the value of bottom slag, etc., to achieve Add value, avoid high costs, and achieve zero-emission effects

CN108033516AInactive Publication Date: 2018-05-15BEIJING GUODIAN FUTONG SCI & TECH DEV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2018-05-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a power plant desulfurization wastewater treatment system, and belongs to the field of thermal power generation. The power plant desulfurization wastewater treatment system comprises a dry-type slag extractor and a spray pipe, a water inlet end of the spray pipe is connected with a concentration device and a water storage device, the concentration device comprises a tubularmicro-filtration membrane and a vibrating membrane, a plurality of nozzles are arranged on the spray pipe and positioned above the dry-type slag extractor, the water storage device is provided with aheating device, a temperature sensor and / or a humidity sensor is arranged on the head of the dry-type slag extractor, and the concentration degree of the concentration device for desulfurization waste water is adjusted according to the temperature and / or the humidity acquired by the temperature sensor and / or the humidity sensor. According to the system, the desulfurization waste water is concentrated and preheated, so that the desulfurization waste water can be completely consumed, zero emission of the desulfurization waste water is achieved, comprehensive utilization values of slag are improved, and the system overcomes the shortcomings that a secondary treatment device is introduced, cost is high, a power plant needs to be reconstructed, and pollution is generated.
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Description

technical field

[0001] The invention relates to the field of thermal power generation, in particular to a desulfurization wastewater treatment system for a power plant. Background technique

[0002] Coal-fired boilers in thermal power plants at home and abroad mostly adopt wet flue gas desulfurization process. The desulfurization wastewater produced is complex, corrosive, difficult to reuse, and expensive to treat. It has become one of the key factors restricting the realization of "zero discharge" of desulfurization wastewater in power plants.

[0003] Chinese patent document CN201520638739 discloses a waste water treatment system for evaporating waste water generated in the pretreatment process of a thermal power plant. On the one hand, the hot slag is cooled while evaporating the waste water, and the evaporated industrial salt is attached to the dry slag in a solid form, which eliminates the strong corrosiveness of the high-concentration wastewater in a liquid form, and ...

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Embodiment Construction

[0020] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0021] The invention provides a power plant desulfurization wastewater treatment system, such as Figure 1-2 As shown, it includes a slag drying machine 2 and a spray pipe 3, the slag drying machine 2 is arranged below the boiler 1, more specifically, it is arranged below the slag well 9, and the water inlet end of the spray pipe 3 is connected with a concentrating device and The water storage device 6, the concentration device includes a tubular microfiltration membrane 4 and a vibrating membrane 5, a number of nozzles 7 are arranged on the spray pipe 3, and the nozzles 7 are located above the dregs drying machine 2, the water storage device 6 is provided with a heating device 8, and the dregs is dried The head 19 is provided with a temperature sensor a...