Abstract: Staged absorption ammonia-based decarbonization using an absorption circulating liquid containing ammonium salts to remove carbon dioxide in a gas, and control ammonia escape while realizing efficient decarbonization through staged solution composition control and reaction condition control. Staged solution composition control may include concentration gradient control of ammonium carbonate, ammonium bicarbonate, ammonium carbamate, ammonia, or combinations thereof, which may be characterized by the molar ratio of total ammonia to total CO2. Reaction condition control may include temperature control, pH control, and pressure control. The flue gas may enter the decarbonization tower, and through staged absorption, establishment of concentration, temperature, and multi-point addition of ammonia, decarbonization efficiency may be improved, decarbonization operating costs may be saved, and ammonia escape may be controlled.

Abstract: Apparatus and methods for controlling ammonia escape in an ammonia-based decarbonization system, wherein ammonia may be used as the desulfurization and decarbonization agent, the gas may first enter the desulfurization device for desulfurization to produce ammonium sulfate fertilizer, and the desulfurized gas may enter the decarbonization device to remove carbon dioxide in the gas, and may produce ammonium bicarbonate fertilizer. The decarbonized gas may include free ammonia, and the free ammonia in the gas may be absorbed with the acidic ammonium sulfate solution and acidic water washing liquid of ammonia-based desulfurization.

Abstract: Device and methods for producing ammonium bicarbonate in an ammonia-based decarbonization system are provided. The device may include a cooling function zone, an ammonium bicarbonate generation zone, a carbon dioxide absorption zone and an ammonia removal function zone. The cooling function zone may remove heat from the decarbonization system. The ammonium bicarbonate generation zone may generate ammonium bicarbonate. The carbon dioxide absorption zone, which may use multi-stage absorption, may absorb carbon dioxide in process gas. The ammonia removal function zone may remove ammonia in decarbonized process gas. Absorbent ammonia for carbon dioxide removal may be mainly fed to the absorption zone. As a result of the zone control of ammonium bicarbonate generation, CO2 absorption and ammonia removal, the efficiency of decarbonization and absorption may be improved, and ammonia escape may be reduced. Meanwhile, carbon dioxide in flue gas can be used for producing ammonium bicarbonate as a nitrogen fertilizer.

Abstract: Multi-stage ammonia-based decarbonization, characterized in that ammonia is used as an absorbent to absorb CO2 in a process gas in an absorber, and the absorber may include four or more stages of absorption, where a first-stage absorption, a second-stage absorption, a third-stage absorption, a fourth-stage absorption, and higher-stage absorptions may be sequentially arranged along the flow direction of the process gas; and the temperature of the process gas in the second and third-stage absorptions may be controlled not to be lower than the temperature of the process gas in the first-stage absorption, and the temperature of the process gas in the fourth and any higher-stage absorptions may be controlled to be lower than the temperature of the process gas in the first-stage absorption.

Abstract: Waste heat recovery in an ammonia-based desulfurization and decarbonization system. The heat in the decarbonization system may be removed by using the heat of the process gas before desulfurization. The process gas before desulfurization may heat an intermediate medium through a gas heat exchanger. The intermediate medium may drive a refrigerator for refrigeration. A refrigerant may obtain the cooling capacity and may then cool the decarbonized process gas through a liquid-liquid heat exchanger.

Abstract: Ammonia-based decarbonization cooling apparatus and a method therefor. The cooling apparatus may include: a first-stage cooling function zone which may use a first circulating liquid to cool a process gas to a temperature of Tgas 1, a second-stage cooling function zone which may use a second circulating liquid to cool the process gas to a temperature of Tgas 2, and a third-stage cooling function zone which may use a third circulating liquid to cool the process gas to a temperature of Tgas 3, wherein Tgas 3<Tgas 2<Tgas 1<Tgas 0, and Tgas 0 is an initial temperature of the process gas when entering the first-stage cooling function zone; a first cold source for cooling the first circulating liquid, a second cold source for cooling the second circulating liquid, and a third cold source for cooling the third circulating liquid, wherein the three cold sources may be different.

Abstract: Apparatus and methods for treating acid gas, which utilizes multi-stage absorption cycle of ammonia desulfurization to treat acid tail gas after pre-treatment of the acid gas, thereby achieving the purpose of efficient and low-cost treatment of acid tail gas. The parameters of the acid tail gas may be adjusted by a regulatory system such that the enthalpy value of the acid tail gas is in the range of 60-850 kJ/kg dry gas, for example, 80-680 kJ/kg dry gas or 100-450 kJ/kg dry gas, to meet the requirements of ammonia desulfurization, and achieve the synergy between the acid gas pre-treatment and ammonia desulfurization. Furthermore, hydrogen sulfide may be converted into sulfur/sulfuric acid plus ammonium sulfate at an adjustable ratio.

Abstract: Apparatus and methods for oxidizing an ammonia desulfurization solution. The apparatus may include an oxidation air system. The apparatus may include an oxidation tank. The apparatus may include in the tank, a gas-liquid dispersion enhancer. The enhancer may include a sieve plate layer that includes a sieve plate. The sieve plate layer may be one of a plurality of sieve plate layers. The plurality may include two or three sieve plate layers. The apparatus may include an oxidation enhancing device mated to the tank. The oxidation enhancing device may include an acoustic wave generating device. The oxidation enhancing device includes an ultrasonic wave generating device. The ultrasonic generating device may be configured to provide a sound intensity in the range 12 to 40 Watts/Liter. The ultrasonic generating device may be configured to provide to a liquid sound intensity in the range 12 to 40 Watts/Liter.

Abstract: Apparatus and methods for treating acid gas, which utilizes multi-stage absorption cycle of ammonia desulfurization to treat acid tail gas after pre-treatment of the acid gas, thereby achieving the purpose of efficient and low-cost treatment of acid tail gas. The parameters of the acid tail gas may be adjusted by a regulatory system such that the enthalpy value of the acid tail gas is in the range of 60-850 kJ/kg dry gas, for example, 80 680 kJ/kg dry gas or 100-450 kJ/kg dry gas, to meet the requirements of ammonia desulfurization, and achieve the synergy between the acid gas pre-treatment and ammonia desulfurization. Furthermore, hydrogen sulfide may be converted into sulfur/sulfuric acid plus ammonium sulfate at an adjustable ratio.

Abstract: Apparatus and methods for treating acid gas, which utilizes multi-stage absorption cycle of ammonia desulfurization to treat acid tail gas after pre-treatment of the acid gas, thereby achieving the purpose of efficient and low-cost treatment of acid tail gas. The parameters of the acid tail gas may be adjusted by a regulatory system such that the enthalpy value of the acid tail gas is in the range of 60-850 kJ/kg dry gas, for example, 80-680 kJ/kg dry gas or 100-450 kJ/kg dry gas, to meet the requirements of ammonia desulfurization, and achieve the synergy between the acid gas pre-treatment and ammonia desulfurization. Furthermore, hydrogen sulfide may be converted into sulfur/sulfuric acid plus ammonium sulfate at an adjustable ratio.

Abstract: Apparatus and methods for treating acid gas, which utilizes multi-stage absorption cycle of ammonia desulfurization to treat acid tail gas after pre-treatment of the acid gas, thereby achieving the purpose of efficient and low-cost treatment of acid tail gas. The parameters of the acid tail gas may be adjusted by a regulatory system such that the enthalpy value of the acid tail gas is in the range of 60-850 kJ/kg dry gas, for example, 80-680 kJ/kg dry gas or 100-450 kJ/kg dry gas, to meet the requirements of ammonia desulfurization, and achieve the synergy between the acid gas pre-treatment and ammonia desulfurization. Furthermore, hydrogen sulfide may be converted into sulfur/sulfuric acid plus ammonium sulfate at an adjustable ratio.

Abstract: Methods for applying ultra-clean ammonia-based desulfurization technology in carbon capture process. A flue gas, after ultra-clean ammonia-based desulfurization, may be directly fed into a carbon capture device for subsequent processing to realize ultra-clean emissions and the integration of desulfurization and decarbonization. This may significantly reduce the investment and operating costs for carbon capture.

Abstract: Apparatus and methods for treating acid gas, which utilizes multi-stage absorption cycle of ammonia desulfurization to treat acid tail gas after pre-treatment of the acid gas, thereby achieving the purpose of efficient and low-cost treatment of acid tail gas. The parameters of the acid tail gas may be adjusted by a regulatory system such that the enthalpy value of the acid tail gas is in the range of 60-850 kJ/kg dry gas, for example, 80-680 kJ/kg dry gas or 100-450 kJ/kg dry gas, to meet the requirements of ammonia desulfurization, and achieve the synergy between the acid gas pre-treatment and ammonia desulfurization. Furthermore, hydrogen sulfide may be converted into sulfur/sulfuric acid plus ammonium sulfate at an adjustable ratio.

Abstract: Apparatus and methods for controlling aerosol production during absorption in ammonia desulfurization, by removing sulfur dioxide in flue gas with an absorption circulation liquid containing ammonium sulfite, so as to control the aerosol production during absorption in ammonia desulfurization. Efficient desulfurization and dust removal may be achieved by staged solution composition control and reaction condition control. At the same time ammonia escape and aerosol production during absorption may be controlled. The flue gas may be subjected to preliminary temperature lowering and purification, and may be allowed to contact with an absorption circulation liquid and a fine particle washing circulation liquid sequentially. Levels of solution compositions and reaction temperatures may be controlled.

Abstract: Apparatus and methods for oxidizing an ammonia desulfurization solution. The apparatus may include an oxidation air system. The apparatus may include an oxidation tank. The apparatus may include in the tank, a gas-liquid dispersion enhancer. The enhancer may include a sieve plate layer that includes a sieve plate. The sieve plate layer may be one of a plurality of sieve plate layers. The plurality may include two or three sieve plate layers. The apparatus may include an oxidation enhancing device mated to the tank. The oxidation enhancing device may include an acoustic wave generating device. The oxidation enhancing device includes an ultrasonic wave generating device. The ultrasonic generating device may be configured to provide a sound intensity in the range 12 to 40 Watts/Liter. The ultrasonic generating device may be configured to provide to a liquid sound intensity in the range 12 to 40 Watts/Liter.

Abstract: Apparatus and methods for controlling aerosol production during absorption in ammonia desulfurization, by removing sulfur dioxide in flue gas with an absorption circulation liquid containing ammonium sulfite, so as to control the aerosol production during absorption in ammonia desulfurization. Efficient desulfurization and dust removal may be achieved by staged solution composition control and reaction condition control. At the same time ammonia escape and aerosol production during absorption may be controlled. The flue gas may be subjected to preliminary temperature lowering and purification, and may be allowed to contact with an absorption circulation liquid and a fine particle washing circulation liquid sequentially. Levels of solution compositions and reaction temperatures may be controlled.

Abstract: Apparatus and methods for controlling aerosol production during absorption in ammonia desulfurization, by removing sulfur dioxide in flue gas with an absorption circulation liquid containing ammonium sulfite, so as to control the aerosol production during absorption in ammonia desulfurization. Efficient desulfurization and dust removal may be achieved by staged solution composition control and reaction condition control. At the same time ammonia escape and aerosol production during absorption may be controlled. The flue gas may be subjected to preliminary temperature lowering and purification, and may be allowed to contact with an absorption circulation liquid and a fine particle washing circulation liquid sequentially. Levels of solution compositions and reaction temperatures may be controlled.

Abstract: Apparatus and methods for controlling aerosol production during absorption in ammonia desulfurization, by removing sulfur dioxide in flue gas with an absorption circulation liquid containing ammonium sulfite, so as to control the aerosol production during absorption in ammonia desulfurization. Efficient desulfurization and dust removal may be achieved by staged solution composition control and reaction condition control. At the same time ammonia escape and aerosol production during absorption may be controlled. The flue gas may be subjected to preliminary temperature lowering and purification, and may be allowed to contact with an absorption circulation liquid and a fine particle washing circulation liquid sequentially. Levels of solution compositions and reaction temperatures may be controlled.

Abstract: Apparatus and methods for controlling aerosol production during absorption in ammonia desulfurization, by removing sulfur dioxide in flue gas with an absorption circulation liquid containing ammonium sulfite, so as to control the aerosol production during absorption in ammonia desulfurization. Efficient desulfurization and dust removal may be achieved by staged solution composition control and reaction condition control. At the same time ammonia escape and aerosol production during absorption may be controlled. The flue gas may be subjected to preliminary temperature lowering and purification, and may be allowed to contact with an absorption circulation liquid and a fine particle washing circulation liquid sequentially. Levels of solution compositions and reaction temperatures may be controlled.

Abstract: Methods for applying ultra-clean ammonia-based desulfurization technology in carbon capture process. A flue gas, after ultra-clean ammonia-based desulfurization, may be directly fed into a carbon capture device for subsequent processing to realize ultra-clean emissions and the integration of desulfurization and decarbonization. This may significantly reduce the investment and operating costs for carbon capture.