Patents Assigned to Jiangnan Environmental Protection Group Inc.
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Patent number: 11529584Abstract: 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.Type: GrantFiled: December 29, 2020Date of Patent: December 20, 2022Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Lifang Qi
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Patent number: 11224838Abstract: 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.Type: GrantFiled: July 22, 2020Date of Patent: January 18, 2022Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Yongying Luo, Jinyong Wang
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Patent number: 11027234Abstract: 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.Type: GrantFiled: June 13, 2018Date of Patent: June 8, 2021Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Lifang Qi, Yongying Luo
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Patent number: 10953365Abstract: 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.Type: GrantFiled: January 13, 2020Date of Patent: March 23, 2021Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Lifang Qi
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Patent number: 10675584Abstract: Methods, apparatus, and compositions for cleaning gas. The use of segmented multistage ammonia-based liquid spray with different oxidation potentials to remove sulfur compounds from gas. The use of different oxidation potentials may reduce unwanted ammonia slip.Type: GrantFiled: August 15, 2019Date of Patent: June 9, 2020Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Changxiang Xu
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Patent number: 10618001Abstract: A desulfurization absorption tower, a method for setting up the same and a method for operating the same. The tower may include an internal anti-corrosion layer that may be used for contacting the flue gas and the desulfurization absorption liquid, may define the tower chamber, and may include stainless steel plate whose thickness is 1.0 mm to 6.0 mm. The tower body may include an external supporting layer that may be used for supporting the anti-corrosion layer and may include carbon steel. The supporting layer and the anti-corrosion layer may be designed to jointly bear a load, wherein the supporting layer may be designed to bear a large part of the load, and the anti-corrosion layer may be designed to bear a small part of the load.Type: GrantFiled: September 10, 2019Date of Patent: April 14, 2020Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Congzhi Zhang, Yongying Luo
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Patent number: 10589212Abstract: Ammonia-adding apparatus and methods for ammonia-based desulfurization use multi-stage control, calculate a theoretical amount of ammonia based on gas amounts provided by an inlet continuous emission monitoring system (CEMS) and an outlet CEMS of the ammonia-based desulfurization device or associated gas amounts, a SO2 concentration provided by the inlet CEMS, and a predetermined SO2 concentration of the outlet CEMS. The apparatus and methods calculate a corrected theoretical amount of ammonia using half of the ratio of the actual amount of added ammonia to the actual amount of removed sulfur dioxide as a correction coefficient for the theoretical amount of ammonia; add an ammonia absorbent equivalent to the corrected theoretical amount of ammonia to the ammonia-based desulfurization device through an ammonia metering means and an ammonia control valve, and automatically control the actual ammonia flow rate based on the actual SO2 concentration and a change trend provided by the outlet CEMS.Type: GrantFiled: April 8, 2019Date of Patent: March 17, 2020Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Jinyong Wang, Jun Zhang
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Patent number: 10583386Abstract: Ammonia-adding apparatus and methods for ammonia-based desulfurization use multi-stage control, calculate a theoretical amount of ammonia based on gas amounts provided by an inlet continuous emission monitoring system (CEMS) and an outlet CEMS of the ammonia-based desulfurization device or associated gas amounts, a SO2 concentration provided by the inlet CEMS, and a predetermined SO2 concentration of the outlet CEMS. The apparatus and methods calculate a corrected theoretical amount of ammonia using half of the ratio of the actual amount of added ammonia to the actual amount of removed sulfur dioxide as a correction coefficient for the theoretical amount of ammonia; add an ammonia absorbent equivalent to the corrected theoretical amount of ammonia to the ammonia-based desulfurization device through an ammonia metering means and an ammonia control valve, and automatically control the actual ammonia flow rate based on the actual SO2 concentration and a change trend provided by the outlet CEMS.Type: GrantFiled: October 12, 2018Date of Patent: March 10, 2020Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Jinyong Wang, Jun Zhang
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Patent number: 10561984Abstract: A desulfurization absorption tower, a method for setting up the same and a method for operating the same. The tower may include an internal anti-corrosion layer that may be used for contacting the flue gas and the desulfurization absorption liquid, may define the tower chamber, and may include stainless steel plate whose thickness is 1.0 mm to 6.0 mm. The tower body may include an external supporting layer that may be used for supporting the anti-corrosion layer and may include carbon steel. The supporting layer and the anti-corrosion layer may be designed to jointly bear a load, wherein the supporting layer may be designed to bear a large part of the load, and the anti-corrosion layer may be designed to bear a small part of the load.Type: GrantFiled: August 8, 2019Date of Patent: February 18, 2020Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Congzhi Zhang, Yongying Luo
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Patent number: 10561982Abstract: Apparatus and methods for desulfurization of a sulfur-oxide containing gas by treatment with ammonia containing liquids. The apparatus and methods may utilize two distinct circuits of two different ammonia containing liquids which are applied in two distinct chambers. The gas may be cooled prior to entry into the circuits. There may be fluid communication between the two circulation circuits.Type: GrantFiled: July 26, 2019Date of Patent: February 18, 2020Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Changxiang Xu, Xiangjun Xu, Yongying Luo
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Patent number: 10556205Abstract: A desulfurization absorption tower, a method for setting up the same and a method for operating the same. The tower may include an internal anti-corrosion layer that may be used for contacting the flue gas and the desulfurization absorption liquid, may define the tower chamber, and may include stainless steel plate whose thickness is 1.0 mm to 6.0 mm. The tower body may include an external supporting layer that may be used for supporting the anti-corrosion layer and may include carbon steel. The supporting layer and the anti-corrosion layer may be designed to jointly bear a load, wherein the supporting layer may be designed to bear a large part of the load, and the anti-corrosion layer may be designed to bear a small part of the load.Type: GrantFiled: February 15, 2019Date of Patent: February 11, 2020Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Congzhi Zhang, Yongying Luo
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Patent number: 10543451Abstract: Ammonia-adding apparatus and methods for ammonia-based desulfurization use multi-stage control, calculate a theoretical amount of ammonia based on gas amounts provided by an inlet continuous emission monitoring system (CEMS) and an outlet CEMS of the ammonia-based desulfurization device or associated gas amounts, a SO2 concentration provided by the inlet CEMS, and a predetermined SO2 concentration of the outlet CEMS. The apparatus and methods calculate a corrected theoretical amount of ammonia using half of the ratio of the actual amount of added ammonia to the actual amount of removed sulfur dioxide as a correction coefficient for the theoretical amount of ammonia; add an ammonia absorbent equivalent to the corrected theoretical amount of ammonia to the ammonia-based desulfurization device through an ammonia metering means and an ammonia control valve, and automatically control the actual ammonia flow rate based on the actual SO2 concentration and a change trend provided by the outlet CEMS.Type: GrantFiled: October 12, 2018Date of Patent: January 28, 2020Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Jinyong Wang, Jun Zhang
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Patent number: 10537845Abstract: Ammonia-adding apparatus and methods for ammonia-based desulfurization use multi-stage control, calculate a theoretical amount of ammonia based on gas amounts provided by an inlet continuous emission monitoring system (CEMS) and an outlet CEMS of the ammonia-based desulfurization device or associated gas amounts, a SO2 concentration provided by the inlet CEMS, and a predetermined SO2 concentration of the outlet CEMS. The apparatus and methods calculate a corrected theoretical amount of ammonia using half of the ratio of the actual amount of added ammonia to the actual amount of removed sulfur dioxide as a correction coefficient for the theoretical amount of ammonia; add an ammonia absorbent equivalent to the corrected theoretical amount of ammonia to the ammonia-based desulfurization device through an ammonia metering means and an ammonia control valve, and automatically control the actual ammonia flow rate based on the actual SO2 concentration and a change trend provided by the outlet CEMS.Type: GrantFiled: April 8, 2019Date of Patent: January 21, 2020Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Jinyong Wang, Jun Zhang
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Patent number: 10471383Abstract: Apparatus and methods for denitrification and desulfurization of and dust removal from an FCC tail gas by ammonia-based process. The apparatus may include a first-stage waste heat recovery system a denitrification system, a dust removal and desulfurization system, a tail gas, exhaust system, and an ammonium sulfate post-processing system. The dust removal and desulfurization system may include as deducting tower and an absorption tower disposed separately. The top and the bottom of the absorption tower may be connected respectively to the tail gas exhaust system and the ammonium sulfate post-processing system. The absorption tower may include sequentially, from bottom to top, an oxidation section, an absorption section, and a fine particulate control section. The methods may be implemented with the apparatus.Type: GrantFiled: June 3, 2019Date of Patent: November 12, 2019Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Jun Zhang, Yongying Luo, Qiang Tan, Xiangjun Xu
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Patent number: 10449488Abstract: 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.Type: GrantFiled: March 29, 2019Date of Patent: October 22, 2019Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Lifang Qi, Jinyong Wang
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Patent number: 10427097Abstract: A desulfurization absorption tower, a method for setting up the same and a method for operating the same. The tower may include an internal anti-corrosion layer that may be used for contacting the flue gas and the desulfurization absorption liquid, may define the tower chamber, and may include stainless steel plate whose thickness is 1.0 mm to 6.0 mm. The tower body may include an external supporting layer that may be used for supporting the anti-corrosion layer and may include carbon steel. The supporting layer and the anti-corrosion layer may be designed to jointly bear a load, wherein the supporting layer may be designed to bear a large part of the load, and the anti-corrosion layer may be designed to bear a small part of the load.Type: GrantFiled: October 31, 2018Date of Patent: October 1, 2019Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Congzhi Zhang, Yongying Luo
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Patent number: 10421040Abstract: A desulfurization absorption tower, a method for setting up the same and a method for operating the same. The tower may include an internal anti-corrosion layer that may be used for contacting the flue gas and the desulfurization absorption liquid, may define the tower chamber, and may include stainless steel plate whose thickness is 1.0 mm to 6.0 mm. The tower body may include an external supporting layer that may be used for supporting the anti-corrosion layer and may include carbon steel. The supporting layer and the anti-corrosion layer may be designed to jointly bear a load, wherein the supporting layer may be designed to bear a large part of the load, and the anti-corrosion layer may be designed to bear a small part of the load.Type: GrantFiled: December 1, 2017Date of Patent: September 24, 2019Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Congzhi Zhang, Yongying Luo
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Patent number: 10413864Abstract: Methods, apparatus, and compositions for cleaning gas. The use of segmented multistage ammonia-based liquid spray with different oxidation potentials to remove sulfur compounds from gas. The use of different oxidation potentials may reduce unwanted ammonia slip.Type: GrantFiled: January 10, 2019Date of Patent: September 17, 2019Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Changxiang Xu
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Patent number: 10406478Abstract: Apparatus and methods for desulfurization of a sulfur-oxide containing gas by treatment with ammonia containing liquids. The apparatus and methods may utilize two distinct circuits of two different ammonia containing liquids which are applied in two distinct chambers. The gas may be cooled prior to entry into the circuits. There may be fluid communication between the two circulation circuits.Type: GrantFiled: June 26, 2018Date of Patent: September 10, 2019Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Changxiang Xu, Xiangjun Xu, Yongying Luo
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Patent number: 10406477Abstract: Methods, apparatus, and compositions for cleaning gas. The use of segmented multistage ammonia-based liquid spray with different oxidation potentials to remove sulfur compounds from gas. The use of different oxidation potentials may reduce unwanted ammonia slip.Type: GrantFiled: October 15, 2018Date of Patent: September 10, 2019Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Changxiang Xu