Boiler system with intelligent ph value control of blowdown time

Abstract

The invention discloses an automatic control boiler system which comprises a monitoring diagnosis controller and a boiler. The boiler comprises a pollution discharge pipe arranged at the lower end of a boiler steam pocket. The pollution discharge pipe is provided with a blow-down valve. One end of the blow-down valve is connected with a valve adjusting device. The valve adjusting device is in data connection with the monitoring diagnosis controller, so that valve opening data are transmitted to the monitoring diagnosis controller, meanwhile, an instruction is received from the monitoring diagnosis controller, and the opening of the blow-down valve is adjusted. The steam pocket further comprises a water quality analyzer. The water quality analyzer comprises a PH value measuring unit so as to measure the PH value of water in the steam pocket. The water quality analyzer is in data connection with the monitoring diagnosis controller so as to obtain measured PH data. The boiler discharges pollution at regular intervals, the pollution discharge speed is kept constant, a central diagnosis monitor automatically sets pollution discharge time according to the measured PH value, and therefore the pollution discharge amount is automatically controlled. Since pollution time is automatically calculated, compared with the prior art, hysteresis is reduced, and optimal pollution discharge control can be achieved.

Description

technical field [0001] The invention belongs to the field of automatic control 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 pot water will produce bubbles, soda and water will rise together, and a large amount of water will be carried in the steam, which will cause a serious false water level and make 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 a superheater, 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...

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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