Membrane-softening treatment system and method used for supplement water for circulating water of reclaimed water source

A technology of softening treatment and circulating water, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of increased operating costs, large floor space, large amount of sludge, etc. problems, to achieve the effect of reducing cost and floor area, saving operating costs, and efficiently retaining

Inactive Publication Date: 2015-12-30
XIAN TPRI WATER & ENVIRONMENTAL PROTECTION
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Problems solved by technology

However, lime treatment is suitable for water with a high temporary hardness ratio, otherwise the residual hardness of the effluent is still high, which limits the increase in the concentration ratio of circulating water; the lime dosing and metering system is prone to failure, which affects the effluent water quality; the amount of sludge formed is large , it is

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  • Membrane-softening treatment system and method used for supplement water for circulating water of reclaimed water source

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[0027] Example

[0028] The water sample is a water source in a power plant, with a turbidity of 9.08NTU, a calcium hardness of 3.86mmol / L, a magnesium hardness of 2.98mmol / L, and SO 4 2- The content is 130mg / L, Cl - The content is 96mg / L, Na + The content is 95mg / L, the dissolved solid content is 715mg / L, the COD is 13mg / L, the TOC is 9.10mg / L; the designed treated water volume of the reclaimed water is 1000m 3 / h.

[0029] Reclaimed water 1000m 3 / h, ultrafiltration cleaning wastewater collection system 13 wastewater 100m 3 / h, nanofiltration cleaning wastewater collection system 14 wastewater 50m 3 / h Enter the original pool 1 for pre-sedimentation, and the bottom of the original pool 1 will be automatically discharged at regular intervals. The amount of mud discharged is about 15m 3 / h, first stored in the sludge tank 15, and then transported by mud tanker for disposal; the original tank 1 effluent is 1135m 3 / h is lifted by the ultrafiltration feed water pump into the ultrafiltr...

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Abstract

The invention discloses a membrane-softening treatment system and method used for supplement water for circulating water of a reclaimed water source. The system comprises a raw water tank, an ultrafiltration device, an intermediate water tank, a nanofiltration device, a clear water tank, a circulating cooling tower, a desulphurization absorbing tower and a scale inhibitor adding system, wherein a water outlet of the raw water tank is communicated with a water inlet of the ultrafiltration device, a water outlet of the ultrafiltration device is connected with a water inlet of the intermediate water tank, a water outlet of the intermediate water tank is merged with a water outlet of the scale inhibitor adding system through a pipeline, then the merged water outlet is communicated with a water inlet of the nanofiltration device, a produced water outlet of the nanofiltration device is communicated with a water inlet of the clear water tank, a water outlet of the clear water tank is communicated with a water inlet of the circulating cooling tower, and a sewage discharge outlet of the circulating cooling tower and a concentrated water of the nanofiltration device are both communicated with a water inlet of the desulphurization absorbing tower. The membrane-softening treatment system and method provided by the invention can effectively improve the concentration ratio of the circulating water and has the advantages of low cost, a small occupied area and good effluent quality.

Description

technical field [0001] The invention belongs to the technical field of sewage reuse, and relates to a softening treatment system and method for reclaimed water source with circulating water replenishment water film method. Background technique [0002] Thermal power plants are large industrial water users, and the open circulation cooling system accounts for 60% to 80% of the total water consumption of the whole plant. In the case of increasing shortage of water resources, most thermal power plants have strictly prohibited the use of groundwater and restricted the use of surface water. In response to national energy conservation and environmental protection policies and local environmental protection requirements, many power plants have begun to use urban reclaimed water, especially as supplementary water for circulating water with the highest proportion of production water. [0003] The total dissolved solids content of reclaimed water is usually higher than that of fresh ...

Claims

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Application Information

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IPC IPC(8): C02F9/04B01D53/18
Inventor 苏艳降晓艳李亚娟翟佳明余耀宏翟绍晶
Owner XIAN TPRI WATER & ENVIRONMENTAL PROTECTION
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