Automatic control system for re-pulping and washing in potash fertilizer production

Abstract

The invention discloses an automatic control system for re-pulping and washing in potash fertilizer production, which comprises a washing control system and a pulp mixing control system, and is characterized in that the washing control system comprises a crude potassium ore inlet quantity computing instrument (3), a washing water flow setting arithmetic device (5), a washing water flow controller (7), a washing water regulation valve actuator (9) and a washing water regulation valve (10) which are sequentially connected; and the pulp mixing control system comprises a centrifuge filtrate flow setting arithmetic device (6), a centrifuge filtrate regulation valve actuator (11), a centrifuge filtrate flow controller (13), a centrifuge filtrate regulation valve (140 and a refined potassium pulp density display instrument (22).

Description

technical field [0001] The invention belongs to the field of potash fertilizer production, and in particular relates to an automatic pulping system for repulping and washing in potash fertilizer production. Background technique [0002] Automatic control refers to the use of external equipment or devices to make a certain working state or parameter of a machine, equipment or production process automatically operate according to a predetermined rule without direct participation of humans. Automatic control is relative to the concept of manual control. [0003] The research of automatic control technology is beneficial to liberate human beings from complicated, dangerous and cumbersome working environment and greatly improve the control efficiency. Automatic control is a branch of engineering science. It involves the automatic influence on a dynamical system using the principle of feedback so that the output value is close to our desired value. [0004] In the process of po...

AI Technical Summary

Problems solved by technology

At present, the method of fresh water washing is manually adding water based on experience. Due to the requirement of pulping concentration, when the amount of fresh water added is too large, it will lead to a large loss of potassium ions, which will inevitably cause waste.

If the amount of fresh water added is too small, the magnesium ions, sodium ions and impurities in the product will not be washed cleanly, which will affect the product quality. At the same time, the amount of centrifuge filtrate used for pulping is also added by manual experience, resulting in unstable pulping concentration and affecting the next process. The normal operation of the process restricts the continuous and stable production process

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