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Advanced treatment method for urban water of electric power plant

A technology for urban reclaimed water and advanced treatment, which is applied in multi-stage water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problem of organic matter content, high ammonia nitrogen content, and complex bacterial population , Corrosive microorganisms and other issues

Inactive Publication Date: 2008-12-10
SHANDONG ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reclaimed water of urban sewage treatment plants has the characteristics of high salt content, organic matter content, ammonia nitrogen content, complex bacterial population, and high corrosion and scaling tendency, resulting in scaling, corrosion and microbial growth of heat exchangers and other components

Method used

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  • Advanced treatment method for urban water of electric power plant
  • Advanced treatment method for urban water of electric power plant
  • Advanced treatment method for urban water of electric power plant

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Experimental program
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Effect test

Embodiment Construction

[0016] The urban reclaimed water advanced treatment method for power plants of the present invention relies on the reclaimed water advanced treatment project of Huadian International Zouxian Power Plant 2*1000MW expansion unit to carry out specific experiments. The source of reclaimed water is the secondary discharge water from Zoucheng Wastewater Treatment Plant.

[0017] 1: Static simulation test

[0018] 1. Lime-coagulation treatment static simulation test of the present invention

[0019] The agents used in the static simulation test are slaked lime, coagulants and coagulants, etc.:

[0020] Slaked lime: solid powder, purity ≥ 94%, fineness: 325 mesh;

[0021] Coagulant: polyferric sulfate (PFS): liquid, total iron content ≥ 10%, density: ≥ 1.45g / cm 3 ;

[0022] Coagulant aid: anionic, cationic polyacrylamide (PAM), solid powder, solid content ≥ 95%.

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Abstract

The invention relates to a method for treating municipal intermediate water, in particular to an advanced treatment method for treating the municipal intermediate water which is used as cooling water for a power plant. The method comprises the following specific steps that: water in a municipal sewage treatment plant is introduced into a pool, respectively added with lime hydrate, polymeric ferric sulfate as a coagulant and polyacrylamide as a coagulant aid and clarified; a clarifying solution is added with an disinfectant for disinfection, added with sulphuric acid for adjusting the PH value of the clarifying solution to between 8 and 8.5 and filtered; and intermediate water after filtration is added with a composite scale corrosion inhibitor, evenly mixed and added to circulating water in the power plant. The advanced treatment method solves the relevant technological difficult problems of advanced treatment, disinfection, scale inhibition, anticorrosion, ammonia nitrogen treatment, etc. of the intermediate water recycled by the power plant and provides technological support for the safe and economic use of the intermediate water in the power plant; and the intermediate water in the power plant is used as circulating water and replenishing water for recycling and has remarkable economic, social and environmental benefits.

Description

technical field [0001] The invention relates to a treatment method for urban reclaimed water, in particular to an advanced treatment method for urban reclaimed water used as cooling water for power plants. Background technique [0002] Cooling water consumes the most water in thermal power plants. Using urban reclaimed water as the supplementary water source for industrial circulation cooling is currently the first choice for countries around the world to solve the water shortage problem. Reusing urban reclaimed water as circulating cooling water for thermal power plants will kill two birds with one stone. It will not only expand the scale of reclaimed water reuse, but also provide a water source with stable water quality and sufficient water volume for power plant cooling water. This will not only open up a second water source, It alleviates the contradiction between supply and demand of water sources, reduces pollution, and reduces the amount of sewage discharged from citi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/52C02F1/50C02F5/10C02F9/14
Inventor 李艳萍李勇许立国徐庆东沈竞为张永林爱杰
Owner SHANDONG ELECTRIC POWER RES INST
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