PH value-based boiler system with pollution discharge time rule change intelligently controlled

Abstract

The invention provides a boiler system. The boiler system comprises a monitoring diagnosing controller and a boiler; the boiler comprises a pollution discharge pipe arranged at the lower end of a boiler drum, and a pollution discharge valve is arranged on the pollution discharge pipe; a central diagnosing monitor automatically sets the pollution discharge time according to the measured PH value, so that the pollution discharge amount is automatically controlled; and the pollution discharge speed is increased continuously along with the increase of the pH value, and in addition, along with theincrease of the pH value, the continuously increasing magnitude of the pollution discharge speed is smaller and smaller. According to the boiler system, the change of the relation between the pollution discharge amount increasing magnitude and the pH value can correspond to the actual pollution discharge amount, so that the pollution discharge efficiency can be improved as soon as possible, and the heat loss is avoided.

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 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 approximated as t...

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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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