Ceramic granite tower circulating water treatment system, circuit and pH value control method

Abstract

The invention relates to a ceramic granite tower circulating water treatment system, a circuit and a pH value control method. The treatment system comprises a closed loop consisting of a granite tower, a water storage tank with a built-in pH detector, a water pump and the granite tower which are sequentially communicated, an electric valve and a liquid caustic soda storage tank which are sequentially communicated with another pipeline of the water storage tank, and an electric control circuit. The control method comprises the following steps: (1) enabling water in the granite tower to flow into the water storage tank; (2) reading the pH value in the water storage tank through the pH detector, and sending the pH value to a PLC (Programmable Logic Controller) in real time for data comparison; (3) judging whether the pH value is in a set value range or not, if not, sending a current signal to control the opening degree of an electric valve of the liquid caustic soda tank by the PLC controller according to a pH feedback value and after PID operation, and returning; and if yes, entering the next step; and (4) starting the water pump and pumping the treated water in the water storage tank to the granite tower for cyclic utilization.

Description

technical field [0001] The invention belongs to the technical field of waste treatment in the ceramic industry, and in particular relates to a treatment system, an electrical control circuit and a pH value control method for circulating water in a ceramic stone tower. Background technique [0002] With the development of modern industry, environmental pollution has become an important issue faced by all countries in the world, and countries are paying more and more attention to environmental protection. As an industry with high energy consumption and high pollution, the ceramic industry emits a large amount of flue gas containing sulfur dioxide during the ceramic production process, which pollutes the ecological environment. The generated flue gas is desulfurized, and the industry generally uses stone towers supplemented by adding a certain amount of liquid alkali and water to desulfurize the flue gas. The basic reaction principle is the reaction process: [0003] SO 2 +Na...

AI Technical Summary

Problems solved by technology

However, in order to meet the requirements of Mashita desulfurization for the water pH control standard in the storage tank, the staff needs to regularly test the pH value of the water in the storage tank every day, and then adjust and determine the pH value of the liquid alkali according to the pH value data obtained from the test. Addition amount, repetitive operation not only increases the work intensity of employees, it is easy to make employees fatigue and cause detection errors, but also introduces human factors into the control link of liquid alkali addition, making the amount of liquid alkali addition unstable in accuracy, affecting The control of the pH value of the circulating water will affect the desulfurization effect of the stone tower

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