TH8902B - Method for controlling oxidant of sulfites - Google Patents

Abstract

In the process of removing sulfur from flugas Which when the waste gas containing sulfur oxide is Treated with an absorbent solution containing calcium compounds. The oxygen-containing gas is passed through the solution. The adsorption and flow rate of oxygen-containing gases is controlled by continuous detection of oxidant-reducing potentiometers of the adsorption solution. Oxidation control methods that include detection The first deviation signal during oxidation-reduction of the sorbent solution and Oxidation - Potential reduction of the adsorbent solution in a fully oxidized state, and the flow rate control of the oxygen-containing gas according to the second deviation signal between the signals. Deviate the first signal And the predetermined oxidation-reduction potentiometric deviation

Claims (3)

1. In the process of removing sulfur from flugas Which when the waste gas containing sulfur oxide is treated With absorbent solutions containing calcium compounds The oxygen-containing gas is passed through a sorbent solution and The flow rate of oxygen-containing gas is regulated by oxidation-reducing potentiometric detection. Of the absorbent solution continuously Oxidation control methods that include signal detection. The first signal is diverted during the oxidation-reduction of the sorbent and oxidation solution. Steeper - reduction of the absorbent's potassium in a fully oxidized state, and the flow rate control of the oxygen-containing gas according to the second deviation signal between the first and the deviation signal Pre-determined oxidation-reduction potentiometer Where the oxidation-reduction deviation The predetermined potency is the oxidation-reduction of the sorbent potassium in the fully oxidized state. Which can be obtained from the relationship that It is known between the sulfurous acid concentration and the oxidation-reduction potentiometric value, removing the oxidation-reduction potassium of the adsorbent state at the predetermined sulfurous acid concentration obtained from Known relationship between sulfurous acid concentrations And the Oxidation-Reduction Potential 2. In the process of removing sulfur from flugas of claim 1, where the control phase The flow rate of oxygen-containing gas consists of Increasing the flow rate of gas containing oxygen When deflection during oxidation-reduction Potential in sorbent and oxidation-reduction solutions Potential of the sorbent solution in the state Was fully oxidized and exceeded the deflection value Oxidation - reduction Preset Potential 3. In the process of removing sulfur from flugas of claim 1, where the control phase The flow rate of oxygen-containing gas consists of Reducing the flow rate of gas containing oxygen When deflection during oxidation-reduction Potential in sorbent solution And oxidation-reduction Potential of the sorbent solution in the state That was fully oxidized was less than the oxidation-reduction value of afternoon. Preset Potential