A steam boiler system with intelligent control of blowdown time

Abstract

The invention provides an intelligently-controlled boiler system. The system is controlled automatically according to the steam quantity generated by boilers and the water quantity input into the boilers, the boilers are subjected to regular sewage discharging, the sewage discharging speed maintains unchanged, a central diagnosis monitor sets the sewage discharging time automatically according to the specific value between the steam mass and the mass of the water input into the boilers, and thus the discharge capacity is controlled automatically. The input water quantity and the generated steam quantity of each boiler are monitored in real time, the dynamic ratio relation between the input water quantity and the generated steam quantity is obtained, the discharge capacity of the boilers is calculated automatically according to the dynamic proportion relation, and the sewage discharging time is adjusted according to the discharge capacity. Compared with the prior art, hysteresis quality is reduced due to the fact that the sewage discharging time is calculated automatically, and the optimal sewage discharging control can be achieved.

Description

Technical field [0001] The invention belongs to the field of steam boilers and belongs to the field of F22. Background technique [0002] During the operation of the steam boiler, the boiler water is concentrated as the steam is produced. When the salt concentration rises to a certain level, the boiler water will foam, and the steam and water will evaporate. The steam will carry a lot of water and cause a serious false water level, which will make the furnace condition control unstable. Therefore, the salt concentration of the boiler water must be controlled to ensure the quality of steam and the safe operation of the boiler. [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 a superheater, the dissolved solids concentration (TDS) of the boiler water must not exceed 2500mg / L. Among them, the dissolved solids can be approximated as the salt content of the pot water...

AI Technical Summary

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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