The present invention is related to a method for determination of unit operations of a chemical plant for acid gas removal, the method carried out by a computer or a distributed computer system and the method comprising the steps of: providing (S1) a first set of parameters for the unit operations; providing (S2) a second set of parameters for the unit operations based on the provided first set of parameters and based on data retrieved from a database; determining (S3) a digital model of the chemical plant based on the first set of parameters and the second set of parameters, wherein the digital model comprises a system of equations defining the unit operations of the chemical plant; selecting (S4) starting points for an equation-based solution method of the system of equations, wherein the starting points are at least partially selected from the: —i) the first set of parameters; —ii) the second set of parameters; and —iii) the data retrieved from the database; determining (S5) resultant settings for the unit operations of the chemical plant using the equation-based solution method for the system of equations initialized by the selected starting points.

Controlling aerosol production during absorption in ammonia-based desulfurization. The absorption reaction temperature, the oxygen content and water content of the process gas may be controlled, and an absorption circulating liquid containing ammonium sulfite may be used for removing sulfur dioxide in flue gas, so as to control aerosol production during absorption in the ammonia-based desulfurization

Air flows across an air-liquid interface such that liquid desiccant flowing through the interface absorbs water from the air and is thereby diluted to form an output stream. The output stream is circulated through an electrodialytic stack having a central ionic exchange membrane and first and second outer ionic exchange membranes. A redox shuttle loop circulates around the first and second outer ionic exchange membranes. A voltage is applied across the electrodialytic stack, which regenerates the liquid desiccant.

A reclaiming apparatus includes: a container; an absorption-liquid supply line for supplying the container with an absorption liquid containing an absorption agent; a water supply line for supplying the container with a water; a steam discharge line for discharging steam from the container; a heating device for heating a liquid containing at least one of the water or the absorption liquid; and a control device configured to determine, on the basis of a temperature of the liquid stored in the container, an ending timing of an absorption-agent recovery process of recovering steam containing the absorption agent via the steam discharge line by heating of the liquid with the heating device.

The present disclosure discloses systems and methods for treating ethylene oxide waste gas. The system for treating ethylene oxide waste gas includes a compounding treatment assembly, an adsorption treatment assembly, and a hydration treatment assembly. The compounding treatment assembly includes a compounding tower to contain a compounding substrate, a first gas inlet, and a first gas outlet. The adsorption treatment assembly includes an adsorber to contain an adsorbent, a second gas inlet, and a second gas outlet. A first connecting pipe connects the first gas outlet with the second gas inlet. The hydration treatment assembly includes a hydration tower to contain water, a third gas inlet, and a third gas outlet. A second connecting pipe connects the second gas outlet with the third gas inlet and an exhaust pipe in communication with the third gas outlet exhausts the gas from the hydration tower.

The present disclosure relates to a system and a method for removing noxious gas from cleaning liquid discharged from an exhaust gas treatment apparatus and, more particularly, to a system and a method for removing noxious gas from cleaning liquid discharged from an exhaust gas treatment apparatus, which are capable of adjusting the discharge rate of the cleaning liquid in a noxious gas removal unit, which removes noxious gas remaining in a gaseous state in the cleaning liquid discharged from the exhaust gas treatment apparatus and discharges the cleaning liquid from which the noxious gas in the gaseous state has been removed, on the basis of a result of measurement of the level of the cleaning liquid in the noxious gas removal unit.

A chemical processing system for removing carbon dioxide from a gas mixture using a multicomponent amine-based scrubbing solution includes a spectroscopic evaluation system with a liquid contact probe for spectroscopic investigation, an energy source connected with the liquid contact probe to provide the spectroscopic stimulation energy to the probe, a spectrometer connected with the liquid contact probe to detect the spectroscopic response energy to the probe and to output spectral data corresponding to the spectroscopic response energy, and a machine learning spectral data analyzer connected to the spectrometer for evaluation of the spectral data to determine a concentration value for each of water, amine component and captured carbon dioxide in the scrubbing solution, the machine learning spectral data analyzer being trained for each such component over a corresponding trained concentration range, and optionally over a trained temperature range to provide a temperature-compensated concentration value.

A dehydration device removes moisture from a process gas compressed by a compressor, and includes a contactor that causes a dehydration solvent to absorb the moisture, a still column that separates the moisture from the dehydration solvent, a carrying line that carries the dehydration solvent from the contactor to the still column, a dehydration solvent conveying pump, a bypass line that couples the carrying lines upstream and downstream of the dehydration solvent conveying pump, a first on-off valve disposed in the bypass line, and a control device. In a case where the pressure detected by a pressure sensor is lower than a first predetermined pressure, the control device closes the first on-off valve and causes the conveying pump to operate, whereas in a case where the pressure detected by the pressure sensor is equal to or higher than the first predetermined pressure, the control device opens the first on-off valve and causes the conveying pump to stop.

A process for purifying polluted air, includes passing polluted air through a fluidized bed of micro-organism-containing primary particulate media so that, as the polluted air passes through the fluidized bed, organic pollutants therein are removed by the micro-organisms. Partially purified air containing a lower level of the organic pollutants than the polluted air that enters the fluidized bed, emerges from the fluidized bed. The partially purified air is passed through a static bed of secondary particulate media thereby to remove residual organic pollutants from the partially purified air. Purified air is thus produced.

The present disclosure relates to a system and a method for removing noxious gas from cleaning liquid discharged from an exhaust gas treatment apparatus and, more particularly, to a system and a method for removing noxious gas from cleaning liquid discharged from an exhaust gas treatment apparatus, which are capable of adjusting the discharge rate of the cleaning liquid in a noxious gas removal unit, which removes noxious gas remaining in a gaseous state in the cleaning liquid discharged from the exhaust gas treatment apparatus and discharges the cleaning liquid from which the noxious gas in the gaseous state has been removed, on the basis of a result of measurement of the level of the cleaning liquid in the noxious gas removal unit.