Absorption tower pH and density measuring device for preventing blocking with rinsing water

Abstract

The invention provides an absorption tower pH and density measuring device for preventing blocking with rinsing water. The absorption tower pH and density measuring device for preventing blocking with rinsing water comprises a mass density meter, a Venturi tube, a pH meter, a pH meter measuring cylinder and an overflow pipe, wherein a measuring pipeline is led out of the bottom of the absorption tower and connected to the top end of the mass density meter; the bottom end of the mass density meter is connected to the bottom end of the pH meter measuring cylinder through a Venturi-tube-bearing pipeline; a measuring electrode of the pH meter is installed on the top end of the pH meter measuring cylinder and extends to the inside of the pH meter measuring cylinder; the top end of the pH meter measuring cylinder is provided with the inverted-U-shaped overflow pipe; and the height of the U-shaped top of the overflow pipe is greater than that of the top end of the pH meter measuring cylinder. The measuring device solves the problem of great measurement errors of pH value and density of the slurry in the absorption tower in the prior art, and enhances the measurement accuracy. The rinsing water system is arranged and used for rinsing the gypsum slurry measuring pipeline or gypsum slurry lead-out measuring pipeline when the pipeline is blocked or the measured value is abnormal.

Description

technical field [0001] The invention relates to a pH and density measuring device of an absorption tower capable of flushing water to prevent blocking. Background technique [0002] At present, under the increasingly stringent environmental protection requirements, thermal power plants are equipped with desulfurization systems. The desulfurization production process is the process in which the gypsum slurry and the sulfur dioxide in the flue gas react in the desulfurization absorption tower. The quality of the desulfurization effect depends on controlling the pH value of the gypsum slurry and the density of the gypsum slurry during the operation. [0003] As an important measurement tool in the process control process, the pH meter is applied to the measurement of the pH of the gypsum slurry in the absorption tower. The pH meter can be used to monitor in real time whether the desulfurization system has sufficient or excessive limestone slurry to fully react with the flue g...

AI Technical Summary

Problems solved by technology

[0006] The invention proposes an absorption tower pH and density measuring device capable of flushing water to prevent plugging, which solves the problem of relatively large measurement errors in the pH value and density of the slurry in the absorption tower in the prior art, and improves the measurement accuracy; moreover, it is also provided with flushing water System, flush the gypsum slurry measurement pipeline or the measurement pipeline drawn from the gypsum slurry when the pipeline is blocked or the measured value is abnormal

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