Ultralow-total organic carbon (TOC) demineralized water preparation system for bleeder turbine generator set

Abstract

The invention relates to an ultralow-total organic carbon (TOC) demineralized water preparation system for a bleeder turbine generator set. The preparation system comprises a mechanical acceleration clarification tank, a clear water tank, an ultrafiltration water feeding pump, a fiber filter, a self-cleaning filter, an ultrafiltration device, an ultrafiltration water tank, a primary reverse osmosis (RO) water feeding pump, an activated carbon filter, a security filter, a primary RO high-pressure pump, a primary RO device, a primary fresh water tank, a clear water pump, a cation exchanger, a carbon remover, an intermediate water tank, an intermediate water pump, an anion exchanger, a mixing bed and a desalted water tank which are connected in sequence; the ultrafiltration water feeding pumpand the primary RO water feeding pump are variable frequency pumps; fixed beds are adopted in the cation exchanger and the anion exchanger; and strongly basic acrylic acid anion exchange resin is adopted in the anion exchanger. According to the invention, the TOC value of supplied water can be ensured, organic matter of the whole water vapor system can be reduced from the source, and potential safety hazards of main equipment of a power plant can be eliminated.

Description

technical field [0001] The invention belongs to the technical field of thermal power generation, and in particular relates to an ultra-low TOC desalinated water preparation system for an extraction steam turbine generator set. Background technique [0002] TOC (Total Oxygen Carbon), total organic carbon, is a comprehensive indicator of the total amount of organic matter in chemical water vapor, and is often used to evaluate the degree of organic matter pollution in water bodies. [0003] TOC has a great impact on the thermal system. In thermal power plants, the decomposition products of TOC can cause thermal equipment such as super(re)heaters and steam turbine blades to be in a corrosive environment, causing boilers, steam turbines and low-pressure cylinders and other major equipment in these power plants to In severe cases, it will cause large-scale corrosion of equipment. With the continuous construction and operation of large-capacity and high-parameter units, the impact...

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Problems solved by technology

The TOC limit and change trend of the boiler feed water in the non-pure condensing system are not clear. At present, the TOC index of the desalted water and water vapor system cannot meet the desalted water standard required by the unit. It is necessary to improve the water treatment process of the boiler feed water

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