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Heat-engine plant circulating water classified concentration series using process

A technology of circulating water and thermal power plants, applied in the direction of ion exchange water/sewage treatment, osmosis/dialysis water/sewage treatment, etc., can solve the problems of large amount of sewage and unsatisfactory results, and achieve the effect of reducing the amount of waste water

Inactive Publication Date: 2007-01-17
POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

The schemes disclosed in the prior art generally adopt single-stage concentration technology, and the circulating supply water is used in parallel, that is, the original water or the cooling water used by the auxiliary machine directly enters the cooling tower of each unit, and the supply water adopts a simple Add acid softening treatment or water stabilizer treatment to increase the concentration ratio of circulating cooling water from 2 to 3 to 4 times, but the amount of sewage is still large, and the effect is not ideal

Method used

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  • Heat-engine plant circulating water classified concentration series using process
  • Heat-engine plant circulating water classified concentration series using process
  • Heat-engine plant circulating water classified concentration series using process

Examples

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Embodiment Construction

[0025] The following examples illustrate the invention.

[0026] This embodiment takes the graded concentration and serial use of the circulating cooling water of four units in a certain power plant as an example.

[0027] The flow chart of this embodiment is attached image 3 give.

[0028] Example Description:

[0029] The four units are rated to operate at full load. The water from the reservoir (water from the source) is used by the industrial system and enters the circulating water system of Units 1 and 2. The circulating water of Units 1 and 2 is operated at a low concentration ratio, and the concentration ratio is 1.76. The sewage was treated by weak acid ion exchange as circulating supply water for Units 3 and 4. The circulating water of Units 3 and 4 was operated with a high concentration ratio of 3.86, and the total concentration ratio of circulating water was 6.79. The sewage was clarified, filtered and After reverse osmosis membrane treatment, it is used as raw ...

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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 softening treated 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/42C02F1/44
Inventor 李志民董建国穆小桂张贵祥
Owner POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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