Cleaning method for concurrent boiler
A once-through boiler and boiler technology, applied in boiler cleaning devices and other directions, can solve the problems of long cleaning process, high consumption, large power consumption, steam, fuel consumption, etc., to shorten the commissioning time, reduce life loss, and improve combustion efficiency. the effect of
Active Publication Date: 2012-07-04
冯伟忠
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Problems solved by technology
The plant power or steam used to drive the feed water pump consumes a lot, and the feed water pump is in a low flow state, so the work efficiency is extremely low
On the other hand, for the hot cleaning method that uses oil guns to heat, not only the cleaning process takes a long time and the efficiency is low, but also during this period, in addition to consuming a large amount of high-quality water, it also needs to consume a large amount of electricity, Steam, fuel oil, etc., increase the cost
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[0024] The principle of the present invention is: use steam to heat the stored water in the deaerator water tank in the thermal system to a certain pressure and temperature, utilize the potential energy of the water in the deaerator water tank, and add the internal pressure of the deaerator water tank Instead of a feed pump, press water directly into the boiler. As long as the total pressure head of the feed water, that is, the potential energy of the water in the deaerator water tank plus the internal pressure of the deaerator water tank, is greater than the static pressure at the inlet of the economizer of the boiler and the static pressure at the outlet of the water wall, it can The boiler is continuously fed with water. If the total pressure head has a certain margin and the internal pressure of the deaerator tank can be maintained, a continuous cleaning flow can be established to overcome the resistance of the system.
[0025] figure 1 It is the flowchart of the once-th...
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The invention provides a cleaning method for a concurrent boiler, which is applied to a steam turbine generator unit. The generator unit comprises a deaerator water box, a water feeding pump, a high-pressure heater, the boiler, a steam-water separator, a separator water box, a drain flash tank and a flash tank water box which are sequentially connected, wherein the deaerator water box receives fed water through a pipeline of a water supply system and receives steam through a steam feeding pipeline. The cleaning method comprises: a, continuously heating water in the deaerator water box through the steam; and b, pressing the water flowing through the water feeding pump and the high-pressure heater into the boiler by the aid of internal pressure and potential energy of the water in the deaerator water box, pressing the water out of the boiler by overcoming the potential energy of the highest point of the boiler, leading the water to flow through the steam-water separator, the separator water box and the drain flash tank, and draining the water from the flash tank water box, wherein the water feeding pump is only used as a flow channel. By the aid of the cleaning method, consumption of fuels and electricity during cleaning of the boiler is reduced, cleaning efficiency is improved, and the water feeding pump, the high-pressure heater and the like are effectively preheated.
Description
technical field [0001] The invention relates to a cleaning method for generating set equipment, in particular to a cleaning method for a once-through boiler. Background technique [0002] With the increasingly mature technology of coal-fired power plants and the urgent need for electricity in social development, the capacity of thermal power units in countries around the world is increasing, and the capacity of large units has reached or even exceeded one million kilowatts. The larger the capacity of the generating set, the more important the efficiency is. Therefore, large-scale thermal power units generally choose once-through boilers as the main furnace. [0003] Supercritical and ultra-supercritical once-through boilers have specified requirements for the water quality in the boiler before ignition to prevent precipitation, scaling and corrosion in the furnace tube after the boiler is ignited, especially in the water wall as the evaporation section Therefore, the econo...
Claims
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Inventor 冯伟忠
Owner 冯伟忠