System for recycling wastewater from circulating cooling water by adopting membrane process
A technology for sewage and circulating water, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. It can solve the problems of effective removal of scale-causing organic matter and no proposed disposal plan. Achieve the effect of reducing scale-causing components and refractory organics, improving backwashing effect and good stability
Active Publication Date: 2015-07-15
XIAN TPRI WATER & ENVIRONMENTAL PROTECTION +2
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Problems solved by technology
However, this treatment method does not effectively remove the scale-causing components and refractory organic matter in the circulating water sewage, and there is no disposal plan for the reverse osmosis concentrated water with a high salt content.
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[0024] The present invention is described in further detail below in conjunction with accompanying drawing:
[0025] refer to figure 1 , the recycling system of circulating water sewage membrane method according to the present invention comprises a pipeline mixer 2, a reaction tank 3, a sedimentation tank 4, a pH adjustment device 5, a filter 6, an ozone contact reaction tank 9, a biological activated carbon filter tank 10, Ultrafiltration device 13, scale inhibitor tank 32, reverse osmosis device 18, fresh water tank 19, electrodialysis device 21, electrodialysis water production tank 22, coagulant dosing system 26, softener dosing system 27, ozone generator 28 , and the raw water pool 1 for placing sewage; the coagulant outlet of the coagulant dosing system 26 and the water outlet of the raw water pool 1 pass through the pipeline mixer 2 manifolds, and the inlet of the reaction tank 3 is connected with the pipeline mixer respectively 2 is connected with the softener outlet ...
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Abstract
The invention discloses a system for recycling a wastewater from circulating cooling water by adopting a membrane process. The system comprises water treatment processes such as alkaline joint softening, ozone-biological active carbon, ultra-filtration, reverse osmosis and electrodialysis. Aiming at the water quality characteristics of the wastewater from circulating cooling water in a heat-engine plant, the process comprises the following steps: firstly, carrying out pretreatment on raw water by adopting the processes such as alkaline joint softening and ozone-biological active carbon treatment, and then adopting an ultra-filtration and reverse osmosis double-membrane treatment technology; entering reverse osmosis drainage into an electrodialysis device to concentrate; carrying out curing treatment on a little of electrodialysis strong brine. The alkaline joint softening and ozone-biological active carbon pretreatment technologies are adopted, so that the content of scaling components and refractory organics in water can be effectively reduced; the maximal reduction of wastewater with high salt content at the tail end is achieved by electrodialysis concentration. Therefore, the system has the characteristics of good operation stability, low pollution plugging of a reverse osmosis membrane, high overall recovery rate and the like.
Description
technical field [0001] The invention belongs to the technical field of sewage reuse, and in particular relates to a membrane recycling system for circulating water sewage. Background technique [0002] Circulating water sewage accounts for about 80% of the total wastewater in circulating cooling thermal power plants, which is the key to water saving and emission reduction in circulating cooling thermal power plants. The salinity, suspended solids, alkalinity, hardness and other contents of the circulating water are high, and in order to prevent corrosion and scale and control the growth of microorganisms, it is necessary to add chemical agents such as water stabilizers and bactericides. Therefore, the refractory organic matter in the circulating water The content is also higher. [0003] At present, the circulating water sewage treatment and reuse system that has been put into operation generally adopts the "coagulation clarification + membrane method (ultrafiltration - rev...
Claims
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IPC IPC(8): C02F9/14
Inventor 许臻苏艳杨宝红姜琪降晓艳李瑞瑞
Owner XIAN TPRI WATER & ENVIRONMENTAL PROTECTION