Component feedback automatic control boiler blowdown system

Abstract

The invention provides an automatic control boiler blowdown system. The system conducts automatic control according to the steam quantity generated by boilers and the water quantity input into the boilers. The boilers are subjected to regular blowdown. A central diagnosis monitor automatically sets the blowdown quantity according to the ratio of the steam mass to the water mass input into the boilers. According to the automatic control boiler blowdown system, by monitoring the input water quantity and the generated steam quantity of all the boilers in real time, the dynamic ratio relation between the input water quantity and the generated steam quantity is obtained; according to the dynamic proportion relation, the blowdown quantity of the boilers is automatically calculated; and according to the blowdown quantity, the blowdown time and speed are adjusted. The automatic control boiler blowdown system automatically calculates the blowdown quantity, so that compared with the prior art, the hysteresis property caused by automatic control in the prior art is reduced, and optimal blowdown control can be achieved.

Description

technical field [0001] The invention belongs to the field of boilers and belongs to the field of F22. Background technique [0002] When the steam boiler is in operation, the boiler water is concentrated as the steam is produced. When the salt concentration rises to a certain level, the water in the pot will foam, and steam and water will rise together, a large amount of water will be carried in the steam, and a serious false water level will be caused, making the control of the furnace condition unstable. Therefore, the salt concentration of boiler water must be controlled to ensure steam quality and boiler operation safety. [0003] my country has national standards for the water quality of industrial boilers. For example, in GB1576-2001, for steam boilers with a pressure of 1.6-2.5Mpa and superheaters, it is stipulated that the dissolved solids concentration (TDS) of the boiler water shall not exceed 2500mg / L. Among them, the dissolved solids can be approximated as the ...

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Problems solved by technology

For example, 201510601501X automatically discharges sewage according to the steam-water ratio of the boiler, but the existing sewage discharge method is to automatically open the sewage valve when a certain parameter reaches a certain level, and close the sewage valve when a certain parameter drops to a certain low limit

Although this intermittent automatic sewage discharge method is improved compared with manual timed sewage discharge, the salt content always fluctuates between high and low limits, and because of the hysteresis of data control, there is still a certain amount of excessive discharge or insufficient discharge, which is not the best. Excellent pollution control scheme

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