Heat-engine plant circulating water classified concentration series using process

Abstract

Circulating cooling water in thermal power plant is two-stage treated, make-up water is made to run serially. The first stage raw water is first used in industrial water system and then made to enter the circular cooling water system of the first stage generator set for low concentration factor, less than 2, running; the exhausted water from the first stage after being dealkalizing and softeningtreated with weak acid ionic exchange resin is used as the circulating make-up water for high concentration factor, up to 45, running in the second stage of generator set, with the total concentration factor being greater than 60; and the exhausted water is treated through clarification, filtering and reverse osmosis before being used as make-up water for boiler system or by other water consumer. The said technological process can reduce exhausted water amount and environmental pollution.

Description

technical field [0001] The invention relates to a technology for staged concentration and serial use of circulating water in thermal power plants, and belongs to the technical field of circulating cooling water treatment in power plants. Background technique [0002] In the power industry, thermal power plants are an important part of electricity production. By the end of 2000, the total installed capacity of power generation in my country was 319.3 million kilowatts, of which thermal power installed capacity was 237.5 million kilowatts, accounting for 74.4% of the total capacity. The production characteristics of thermal power plants consume fuel and water resources. Taking water as an example, the total annual water consumption in the country is 2.354 billion cubic meters, and the fresh water intake for thermal power generation in the country is 58.6 billion cubic meters, accounting for about half of the total industrial water intake in the country. Therefore, it becomes ...

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