Internal cold water supplying system for electricity generator cold water system

Abstract

The invention discloses an inner cooling water supplement system of a cooling water system of a generator. The inner cooling water supplement system of the invention comprises a unit demineralized water supplement system comprising a unit demineralizing device and demineralized water supplement pipelines after the addition of ammonia; the unit demineralizing device is communicated with an axial heater which is then communicated with a stator water tank through the pipelines, and the invention is characterized in that a water supplement point which is used for adjusting the conductivity value is added on a pipeline in front of the unit demineralizing device and the axial heater and a filter is installed on a pipeline by which the axial heater is communicated with the stator water tank. The inner cooling water supplement system of the invention can prevent iron oxides in condensate from depositing in the inner cooling water system, adjust the pH value of the demineralized water, avoid the risk of the generator burning caused by the reduction of the flow area due to the corrosion of a generator coil bar and also effectively prevent resin of the unit demineralizing device from leaking into a stator water system of the generator, thereby improving the stability, safety and reliability in the operation of the generator due to the improved water quality.

Description

Technical field: [0001] The invention belongs to water supply equipment, in particular to an internal cooling water supply system of a generator cooling water system. Background technique: [0002] The water replenishment of the generator cooling water system is divided into 3 routes, the first route is the condensate water of the unit, which is given priority when the unit is running stably and the condenser does not leak; the second route is the condensate water of the neighboring machine; the third The road make-up water is desalted water or small mixed bed bypass operation. [0003] Disadvantages when using condensed water to make up water: Since the boiler feed water is operated with oxygen, as the operating time prolongs, the iron oxide particles in the condensed water will increase, and the iron content will tend to increase. In this case, the condensed water is directly added. After the generator stator bar is heated up, some iron oxide particles in the water are de...

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Problems solved by technology

[0003] Disadvantages when using condensed water to make up water: Since the boiler feed water is operated with oxygen, as the operating time prolongs, the iron oxide particles in the condensed water will increase, and the iron content will tend to increase

Since the desalinated water has not been taken to remove oxygen, the dissolved oxygen concentration of the supplemented water is 6000-8000μg / L, the pH is 6-7, and the copper content is > 40μg / L. DL / T801-2002 requires that the dissolved oxygen concentration of the inner cooling water should be Less than 30μg / L, and desalted water pH>7, copper content<40μg / L, after using desalted water as the water source, the copper content in the inner cooling water of the generator exceeds the standard. Obviously, this way of replenishing water does not meet the water quality requirements

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