Chemical agent capable of completely recycling power plant wastewater into circulating cooling water and preparation method of chemical agent

Abstract

The invention discloses a chemical agent capable of completely recycling power plant wastewater into circulating cooling water. The chemical agent is characterized by comprising the following components in percentage by mass: 20-50% of a scale inhibitor, 15-60% of a dispersant, 10-40% of a sludge modifier, 5-10% of a pre-filming agent, 5-10% of a corrosion inhibitor, 5-10% of an anti-settling agent and the balance of water. The chemical agent meets the standard specified by DL / T806-2002 Corrosion Inhibitor for Power Plant Circulating Cooling water. Compared with the prior art, the circulating cooling water is directly injected into a circulating water system with no addition of facilities, no need of investment and no energy consumption, the circulating water system is not scaled or corroded for many years, inorganic solids and sludge formed in the running process can be cleared in the overhaul or pumped by a sludge pump and dried in air for filling pit or paving the road and thus the zero emission of the power plant circulating water system is achieved.

Description

technical field [0001] The invention relates to a medicament and a preparation method thereof, in particular to a medicament capable of recycling all power plant wastewater for circulating cooling water and a preparation method thereof. All the waste water from the power plant is used for circulating cooling water of the power plant. After using this agent, the circulating water system equipment can achieve no scaling and no corrosion for many years, and achieve true zero discharge. Background technique [0002] As we all know, the wastewater generated by power plants includes boiler blowdown water, reverse osmosis concentrated water, desulfurized water, acid-base wastewater from ion exchange resin regeneration, domestic water, etc. At present, the methods for treating the above wastewater in power plants are as follows: [0003] ① None of the thermal power plants (except for the users using this agent and technology) is an enterprise that reuses all waste water for circulat...

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Problems solved by technology

[0003] ① None of the thermal power plants (except the users using this agent and technology) is an enterprise that reuses all waste water for circulating cooling water to achieve zero discharge and the equipment does not scale or corrode for many years

[0004] ② There are four treatment methods for reverse osmosis concentrated water. One is to carry out high-pressure membrane treatment, recycle the produced water, and discharge 30-50% of the concentrated water, which belongs to the method of high energy consumption and emission reduction; the other is to carry out multi-effect evaporation, which will The waste water is heated into steam, then cooled into distilled water for recycling, the concentrated liquid is discharged or the crystallization is solidified by dosing, the investment is large, the operating cost is high, and the heat consumption is huge, so few users adopt it; the third is to discharge into the evaporation pond, evaporate or Formation leakage causes groundwater pollution; the fourth is direct discharge of natural rivers, lakes and seas

[0005] ③The treatment of desulfurized water is quite difficult. Some enterprises discharge it disorderly or discharge it to urban sewage plants for treatment, and some enterprises mix it with coal and incinerate it, forming a vicious circle

Although it has achieved the effect of zero discharge in the circulating water system, it still needs to increase investment in facilities during the implementation process

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