Fuel coal desulfurization slurry pH detection device

Abstract

The invention discloses a fuel coal desulfurization slurry pH detection device which comprises a branch pipe, a three-way valve, a liquid-collecting bag, a circulating tank, a pH monitoring system and a backflow pipe. The inlet end of the branch pipe is connected with desulfurization slurry, the outlet end of the branch pipe is connected with a first inlet of the three-way valve through a control valve, a second inlet of the three-way valve is connected with a cleaning pipe with a valve, and an outlet of the three-way valve is connected with the lower end of the liquid-collecting bag through a pressure reducing valve. The upper portion of the liquid-collecting bag is provided with a slurry outlet and connected with an inlet of the circulating tank, the lower portion of the liquid-collecting bag is provided with a sewage discharging port and connected with the backflow pipe, and an outlet of the circulating tank is connected with the inlet end of the backflow pipe. The pH monitoring system comprises a pH electrode which is arranged in the circulating tank. The fuel coal desulfurization slurry pH detection device can detect the pH of desulfurization slurry and can also perform automatic cleaning work on the pH electrode. The fuel coal desulfurization slurry pH detection device has the advantages of accuracy in pH detection, high sensitivity, convenience in cleaning and simple structure and is stable and long in service life.

Description

technical field [0001] The invention relates to a pH detection device, in particular to a pH detection device for coal-fired desulfurization slurry. Background technique [0002] With the requirements of environmental protection and energy saving and emission reduction, SO 2 Pollution control has also received more and more attention. In my country, in addition to the iron and steel smelting industry is SO 2 Large outdoor emissions, coal-fired power plants are also SO 2 one of the largest emitters. At present, coal-fired power plants mainly use wet desulfurization, which uses alkaline slurry to absorb SO 2 , how effective the desulfurization is, the pH control of the desulfurization slurry is very important. If the pH value is too high, it is easy to cause waste of desulfurization slurry; if the pH value is too low, the desulfurization effect will be poor. For this reason, the pH detection device is used in the industrial desulfurization system to monitor the slurry in...

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Problems solved by technology

[0003] 1. Since the desulfurization slurry contains a large number of fine solid particles, it is easy to cause pollution and blockage to the pH electrode, resulting in inaccurate measurement of the pH value of the slurry, which affects the monitoring of the desulfurization effect of the desulfurization system;

[0004] 2. Due to the high temperature and high liquid pressure of the desulfurization slurry, the impact force on the pH electrode is large, and the long-term impact may easily cause damage to the pH electrode, affecting the sensitivity and service life of the detection device

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