Sulfur Recovery Daily Question 2018.10.13

Taking advantage of the fact that certain substances in odors are soluble in water, the components of these odors are brought into direct contact with water, where they dissolve to achieve deodorization

There are many exhaust gas absorption processes in the sulfur recovery unit, with significant differences in principle. The hydrogenation reduction absorption process involves using a special hydrogenation catalyst designed for exhaust gas treatment to reduce and hydrolyze elements such as S, SO2, COS, and CS2 present in sulfur recovery exhaust gases, under very low hydrogen partial pressures and low operating pressures, into H2S. This H2S is then absorbed by an alcohol amine solution, and the regenerated alcohol amine solution is reused ； The rich liquid that has absorbed H2S is subjected to regeneration treatment, and the H2S-rich gas is returned to the upstream sulfur recovery section. The concentration of SO2 in the purified gas obtained after absorption treatment, along with the exhaust gases resulting from combustion, is below the relevant standards set by the \"Comprehensive Emission Standards for Air Pollutants\".

The flue gas absorption in the sulfur system involves connecting two absorption towers in series for absorption purposes. The first absorption tower is primarily used to absorb SO2, while the second absorption tower is used mainly to absorb H2S.

There are many exhaust gas absorption processes in the sulfur recovery unit, with significant differences in principle. The hydrogenation reduction absorption process involves using a special hydrogenation catalyst designed for exhaust gas treatment to reduce and hydrolyze elements such as S, SO2, COS, and CS2 present in sulfur recovery exhaust gases, under very low hydrogen partial pressures and low operating pressures, into H2S. This H2S is then absorbed by an alcohol amine solution, and the regenerated alcohol amine solution is reused ； The rich liquid that has absorbed H2S is subjected to regeneration treatment, and the H2S-rich gas is returned to the upstream sulfur recovery section. The concentration of SO2 in the purified gas obtained after absorption treatment, along with the exhaust gases resulting from combustion, is below the relevant standards set by the \"Comprehensive Emission Standards for Air Pollutants\".

Gas absorption takes place based on the different solubilities of the various components in a gas mixture within a liquid. The components that are dissolved by the solvent are called solutes, while the liquid that dissolves the gases is referred to as the solvent or absorbent. The absorbent that has absorbed the solutes is known as a solution. When a solvent absorbs a solute, as the amount of absorption increases, the concentration of the solute in the solvent rises until it reaches a saturated concentration at which point absorption stops. This saturated concentration represents the solubility of that solute in this solvent. The saturation pressure is equal to its partial pressure in the gas phase, meaning a state of phase equilibrium has been reached.

Answer: Exhaust gas absorption is carried out based on the different solubilities of the various components in a gas mixture within a liquid. The component that is dissolved by the solvent is called the solute, while the liquid that dissolves the gas is referred to as the solvent or absorbent. The absorbent that has absorbed the solute is known as a solution. When a solvent absorbs a solute, as the amount of absorption increases, the concentration of the solute in the solvent rises until it reaches a saturated concentration at which point absorption stops. This saturated concentration represents the solubility of that solute in this solvent. Phase equilibrium is reached when the saturation pressure is equal to its partial pressure in the gas phase.

Gas absorption is a process that takes place based on the different solubilities of the various components in a gas mixture within a liquid. The component that is dissolved by the solvent is called the solute, while the liquid that dissolves the gas is referred to as the solvent or absorbent. The absorbent that has absorbed the solute is known as a solution. When a solvent absorbs a solute, as the amount of absorption increases, the concentration of the solute in the solvent rises until it reaches a saturated concentration at which point absorption stops. This saturated concentration represents the solubility of that solute in this solvent. Phase equilibrium is reached when the saturation pressure is equal to its partial pressure in the gas phase.

The waste gas enters the falling film recycler through the exhaust pipe, where it is cooled and absorbed to produce acid. The dilute acid liquid recovered by the falling film recycler flows into the storage tank via the discharge pipe. The waste gas that has not been absorbed proceeds to the primary absorption tower; the dilute acid liquid obtained from there is also sent to the tower’s storage tank. Any remaining unabsorbed waste gas then goes to the secondary absorption tower, and the dilute acid liquid resulting from this process is stored in that tower’s storage tank as well. A small amount of waste gas that still hasn’t been absorbed is sent to the vacuum pump, and the liquid recovered by the vacuum pump is stored in the main storage tank. The waste gas that has been sufficiently purified by the vacuum pump is then discharged through the exhaust pipe.

Gas absorption takes place based on the different solubilities of the various components in a gas mixture within a liquid. The components that are dissolved by the solvent are called solutes, while the liquid that dissolves the gases is referred to as the solvent or absorbent. The absorbent that has absorbed the solutes is known as a solution. When a solvent absorbs a solute, as the amount of absorption increases, the concentration of the solute in the solvent rises until it reaches a saturated concentration at which point absorption stops. This saturated concentration represents the solubility of that solute in this solvent. The saturation pressure is equal to its partial pressure in the gas phase, meaning a state of phase equilibrium has been reached.