Desulfurization and denitrification neutralization liquid pH automatic adjustment control system

Abstract

The desulfurization and denitrification neutralization liquid pH value automatic adjustment control system relates to a pH value monitoring and adjustment system, including the pH value monitoring system raw material, slurry, and tailings pH value monitoring, and also includes a pneumatic manipulator including a pH value probe, and a pneumatic manipulator. The protection of the manipulator prolongs the service life of the PH value sensor and provides a guarantee for the stable operation of the automation system; the automatic mixing and feeding system includes the preparation of the silo controlled by the material level gauge and the water pool stirred by the impeller. The pH, density, liquid The mass fraction of limestone slurry is reasonably controlled, which improves the desulfurization efficiency and saves maintenance costs; the equipment uses PH value monitoring to control feeding, PH value, and circulating pumps, and has the ability to output PH value and gas index data in real time through human-computer interaction. The function has changed the situation of traditional manual management and can greatly reduce the accidents of excessive discharge. Realized the automatic management of desulfurization equipment, saving labor management costs.

Description

technical field [0001] The invention relates to an adjustment control system, in particular to an automatic pH value monitoring and adjustment system for wet flue gas desulfurization treatment in iron and steel plants and coal-fired thermal power plants. Background technique [0002] With the sustained and rapid development of industry, my country's coal consumption has become the world's largest, resulting in a large amount of emissions of sulfur, nitrogen oxides and other harmful substances, and the environmental pollution caused by SO2 emissions has become increasingly prominent. Excessive sulfur dioxide and nitrogen oxides have formed a large area of ​​acid rain. At present, there are large areas of acid rain in Southwest my country and South China. It has become the third largest acid rain area in the world after North America and Europe. Acid rain is one of the three major environmental problems in the world today. one. Because SO2 in the flue gas produced by fuel is t...

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Problems solved by technology

Problem 1: The PH value sensor cannot be used in an alkaline environment for a long time, especially a highly alkaline environment, and it will be damaged after long-term use. Therefore, this situation has led to the problem of directly controlling the slurry and desulfurization through the PH value, and the price of foreign PH value sensors is high. , close to 10,000 RMB, the service life is only a few months, the domestic price is lower, and the service life is lower

Problem 2: Fully automatic control of the PH value of the slurry, automatic feeding, stirring, liquid level, activity of limestone, and fineness; these parameters require the implementation of the PH value data of the slurry in addition to a full range of sensor technology and automatic control technology Feedback, the current common method is to detect the content and mass fraction of sulfur and nitrogen. Although this method can feed back the desulfurization efficiency to a certain extent, it has a lag. Administrative penalties; secondly, the test cannot directly feed back the pH value of the slurry, which is directly linked to the desulfurization efficiency. It is often processed after the alarm, and it is difficult to control the addition and transportation of suitable materials. It is often added in a hurry, and it is impossible to guarantee the limestone. Activity, fineness and other parameters

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