A desulfurization and denitrification neutralization liquid PH value automatic adjusting and control system

Abstract

The invention provides a desulfurization and denitrification neutralization liquid PH value automatic adjusting and control system and relates to a PH value monitoring and adjusting system. The system comprises a PH value monitoring system used for PH value monitoring of raw materials, slurry, and tailings, and also comprises pneumatic manipulators with PH value probes. The pneumatic manipulator protectors prolong the service life of PH value sensors and guarantee the stable operation of the automatic system; an automatic stirring and feeding system comprises a material level meter used for controlling the material preparation of a temperature material bin and a water tank employing an impellor for stirring; the pH, density and liquid level of the slurry and the mass fraction of limestone slurry are controlled reasonably, so that the desulfurization efficiency is increased and the maintenance cost is saved; the apparatus employs PH value monitoring to control feeding, the PH values and a circulating pump and has a function of man-machine interaction-based real-time output of PH value and gas index data, and thereby changes the conventional mode of manual management and can greatly reduce excessive emission accidents. The system realizes fully-automatic management of desulfurization apparatuses and saves the labor management cost.

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...

AI Technical Summary

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

Images