Patents by Inventor Leming Cheng

Leming Cheng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11994286
    Abstract: A method of preventing high temperature corrosion on a heat exchanging surface of a biomass boiler, including: a first feeding step, supplying a first biomass fuel to the boiler; a deposition step, performing combustion on the first biomass fuel during initial operation of the boiler, and forming an inert deposition layer on a surface of a heat exchanger of the boiler; a second feeding step, supplying a second biomass fuel different from the first biomass fuel to the boiler; and a normal combustion step, performing combustion on the second biomass fuel. A direct contact of an alkali metal chloride with a metal pipe wall is prevented by forming an inert deposition layer on the surface of the heat exchanger of the boiler in the deposition step, thereby establishing a physical barrier between the heat exchanging surface and the alkali metal chloride to prevent corrosion on the metal pipe wall.
    Type: Grant
    Filed: October 13, 2021
    Date of Patent: May 28, 2024
    Assignee: ZHEJIANG UNIVERSITY
    Inventors: Zhongyang Luo, Chunjiang Yu, Qinhui Wang, Mengxiang Fang, Hengli Zhang, Leming Cheng
  • Publication number: 20220113022
    Abstract: The present invention provides a method of preventing high temperature corrosion on a heat exchanging surface of a biomass boiler, including: a first feeding step, supplying a first biomass fuel to the boiler; a deposition step, performing combustion on the first biomass fuel during initial operation of the boiler, and forming an inert deposition layer on a surface of a heat exchanger of the boiler; a second feeding step, supplying a second biomass fuel different from the first biomass fuel to the boiler; and a normal combustion step, performing combustion on the second biomass fuel. A direct contact of an alkali metal chloride with a metal pipe wall is prevented by forming an inert deposition layer on the surface of the heat exchanger of the boiler in the deposition step, thereby establishing a physical barrier between the heat exchanging surface of the boiler and the alkali metal chloride to effectively solve a problem of preventing corrosion on the metal pipe wall of the boiler.
    Type: Application
    Filed: October 13, 2021
    Publication date: April 14, 2022
    Inventors: Zhongyang Luo, Chunjiang Yu, Qinhui Wang, Mengxiang Fang, Hengli Zhang, Leming Cheng
  • Patent number: 10821397
    Abstract: The present invention is related a square packed tower for collection of flue gas CO2. The square packed tower comprises an initial absorbent distributor on the lower end of the flue gas outlet, a vertical plate packer on the lower end of the initial absorbent distributor and a radial diversion gas distributor at the bottom of the square packed tower for delivery of carbon dioxide contained in the flue gas. The radial diversion gas distributor comprises a gas inlet pipe, a butterfly base plate, a butterfly seal plate and numerous radial deflectors. The butterfly base plate is connected with outlet of the gas inlet pipe. The radial deflectors are in radial arrangement between the butterfly base plate and butterfly seal plate along the outlet of gas inlet pipe.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: November 3, 2020
    Assignee: ZHEJIANG UNIVERSITY
    Inventors: Tao Wang, Mengxiang Fang, Wenfeng Dong, Qinhui Wang, Jianmeng Cen, Leming Cheng, Gang Xiao, Chenghang Zheng, Jinsong Zhou, Shurong Wang, Xiang Gao, Zhongyang Luo, Mingjiang Ni, Kefa Cen
  • Patent number: 10578341
    Abstract: A dual-cavity method and device for collecting and storing solar energy with metal oxide particles. Solar radiation irradiates into a light receiving cavity of a dual-cavity, heat-collecting reactor to heat a separating plate and preheat metal oxide particles. The preheated metal oxide particles then enter a reacting cavity. As temperature increases, the metal oxide particles reduce to release oxygen, which discharges through a gas outlet. Reduced metal oxide particles discharge through a particle outlet into a particle storage tank, and then into an oxidation heat exchanger to react with the discharged oxygen discharged to release and transfer stored chemical energy to a medium to be heated. The oxidized metal oxide particles are conveyed into a storage tank, and again enter into a particle inlet of the light receiving cavity. Ambient air controls the gas flow rate in the reactor and the reacting rate in exchanger.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: March 3, 2020
    Assignee: ZHEJIANG UNIVERSITY
    Inventors: Gang Xiao, Tianfeng Yang, Mingjiang Ni, Zhongyang Luo, Xiang Gao, Kefa Cen, Mengxiang Fang, Jinsong Zhou, Zhenglun Shi, Leming Cheng, Qinhui Wang, Shurong Wang, Chunjiang Yu, Tao Wang, Chenghang Zheng
  • Patent number: 10533494
    Abstract: A solar chemically recuperated gas turbine system includes an exhaust-gas reformer, a solar reformer and a gas turbine unit with a combustion chamber. The reaction outlet of the exhaust-gas reformer is connected to the inlet of the solar reformer, the flue gas side inlet of the exhaust-gas reformer is connected to the exhaust-gas outlet of the gas turbine. The solar reformer outlet is connected to the combustion chamber inlet. Combustion gas drives the gas turbine after fuel burns in the combustion chamber, and the exhaust gas enters the exhaust-gas reformer. Fuel and steam are mixed and enter the reaction side of the exhaust-gas reformer through a fuel inlet. A reforming reaction between the fuel and steam under heating of the exhaust gas generates syngas. A further reforming reaction occurs by absorbing concentrated solar energy after the syngas enters the solar reformer, and the reactant is provided to combustion chamber.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: January 14, 2020
    Assignee: Zhejiang University
    Inventors: Gang Xiao, Tianfeng Yang, Mingjiang Ni, Zhongyang Luo, Xiang Gao, Kefa Cen, Mengxiang Fang, Jinsong Zhou, Zhenglun Shi, Leming Cheng, Qinhui Wang, Shurong Wang, Chunjiang Yu, Tao Wang, Chenghang Zheng
  • Patent number: 10494996
    Abstract: A device of high-temperature solar gas turbine power generation with thermal energy storage includes a combustion chamber, a solar receiver, a thermochemical energy storage tank, a triple valve A and a triple valve B. The thermochemical energy storage tank has a high-temperature side and a low-temperature side. One outlet of the triple valve A is connected to the compressed air inlet of the solar receiver, and the other outlet is connected to the inlet of the triple valve B. One outlet of the triple valve B is connected to the low-temperature side of the thermochemical energy storage tank, and the other outlet is connected to the inlet of the combustion chamber.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: December 3, 2019
    Assignee: ZHEJIANG UNIVERSITY
    Inventors: Gang Xiao, Xin Zhou, Huanlei Liu, Jinli Chen, Tianfeng Yang, Mingjiang Ni, Zhongyang Luo, Leming Cheng, Xiang Gao, Kefa Cen, Mengxiang Fang, Jinsong Zhou, Zhenglun Shi, Qinhui Wang, Shurong Wang, Chunjiang Yu, Tao Wang, Chenghang Zheng
  • Publication number: 20190099712
    Abstract: The present invention is related a square packed tower for collection of flue gas CO2. The square packed tower comprises an initial absorbent distributor on the lower end of the flue gas outlet, a vertical plate packer on the lower end of the initial absorbent distributor and a radial diversion gas distributor at the bottom of the square packed tower for delivery of carbon dioxide contained in the flue gas. The radial diversion gas distributor comprises a gas inlet pipe, a butterfly base plate, a butterfly seal plate and numerous radial deflectors. The butterfly base plate is connected with outlet of the gas inlet pipe. The radial deflectors are in radial arrangement between the butterfly base plate and butterfly seal plate along the outlet of gas inlet pipe. Such square packed tower has solved such problems as low mass transfer efficiency, uneven distribution of gas phase inside the tower and high investment.
    Type: Application
    Filed: November 27, 2017
    Publication date: April 4, 2019
    Inventors: TAO WANG, MENGXIANG FANG, WENFENG DONG, QINHUI WANG, JIANMENG CEN, LEMING CHENG, GANG XIAO, CHENGHANG ZHENG, JINSONG ZHOU, SHURONG WANG, XIANG GAO, ZHONGYANG LUO, MINGJIANG NI, KEFA CEN
  • Publication number: 20180045113
    Abstract: A device of high-temperature solar gas turbine power generation with thermal energy storage includes a combustion chamber, a solar receiver, a thermochemical energy storage tank, a triple valve A and a triple valve B. The thermochemical energy storage tank has a high-temperature side and a low-temperature side. One outlet of the triple valve A is connected to the compressed air inlet of the solar receiver, and the other outlet is connected to the inlet of the triple valve B. One outlet of the triple valve B is connected to the low-temperature side of the thermochemical energy storage tank, and the other outlet is connected to the inlet of the combustion chamber.
    Type: Application
    Filed: May 5, 2017
    Publication date: February 15, 2018
    Inventors: Gang Xiao, Xin Zhou, Huanlei Liu, Jinli Chen, Tianfeng Yang, Mingjiang Ni, Zhongyang Luo, Leming Cheng, Xiang Gao, Kefa Cen, Mengxiang Fang, Jinsong Zhou, Zhenglun Shi, Qinhui Wang, Shurong Wang, Chunjiang Yu, Tao Wang, Chenghang Zheng
  • Publication number: 20170298818
    Abstract: A solar chemically recuperated gas turbine system includes an exhaust-gas reformer, a solar reformer and a gas turbine unit with a combustion chamber. The reaction outlet of the exhaust-gas reformer is connected to the inlet of the solar reformer, the flue gas side inlet of the exhaust-gas reformer is connected to the exhaust-gas outlet of the gas turbine. The solar reformer outlet is connected to the combustion chamber inlet. Combustion gas drives the gas turbine after fuel burns in the combustion chamber, and the exhaust gas enters the exhaust-gas reformer. Fuel and steam are mixed and enter the reaction side of the exhaust-gas reformer through a fuel inlet. A reforming reaction between the fuel and steam under heating of the exhaust gas generates syngas. A further reforming reaction occurs by absorbing concentrated solar energy after the syngas enters the solar reformer, and the reactant is provided to combustion chamber.
    Type: Application
    Filed: April 17, 2017
    Publication date: October 19, 2017
    Inventors: Gang Xiao, Tianfeng Yang, Mingjiang Ni, Zhongyang Luo, Xiang Gao, Kefa Cen, Mengxiang FANG, Jinsong Zhou, Zhenglun Shi, Leming Cheng, Qinhui Wang, Shurong Wang, Chunjiang Yu, Tao Wang, Chenghang Zheng
  • Publication number: 20170191697
    Abstract: A dual-cavity method and device for collecting and storing solar energy with metal oxide particles. Solar radiation irradiates into a light receiving cavity of a dual-cavity, heat-collecting reactor to heat a separating plate and preheat metal oxide particles. The preheated metal oxide particles then enter a reacting cavity. As temperature increases, the metal oxide particles reduce to release oxygen, which discharges through a gas outlet. Reduced metal oxide particles discharge through a particle outlet into a particle storage tank, and then into an oxidation heat exchanger to react with the discharged oxygen discharged to release and transfer stored chemical energy to a medium to be heated. The oxidized metal oxide particles are conveyed into a storage tank, and again enter into a particle inlet of the light receiving cavity. Ambient air controls the gas flow rate in the reactor and the reacting rate in exchanger.
    Type: Application
    Filed: December 12, 2014
    Publication date: July 6, 2017
    Inventors: Gang XIAO, Tianfeng YANG, Mingjiang NI, Zhongyang LUO, Xiang GAO, Kefa CEN, Mengxiang FANG, Jinsong ZHOU, Zhenglun SHI, Leming CHENG, Qinhui WANG, Shurong WANG, Chunjiang YU, Tao WANG, Chenghang ZHENG
  • Patent number: 8663373
    Abstract: A free radical injection ionizer for flue gas treatment with corona discharge includes an injection device for releasing free radical source substances and an electrode device for producing corona, wherein the injection device and the electrode device are arranged separately, wherein the electrode device includes a conductive pole, and discharge tips arranged on the upper and lower sides of the conductive pole at equal intervals, and the injection device includes nozzles symmetrically arranged on two sides of the electrode device, and two lines of holes axially arranged on the walls of the nozzles nearby the electrode device, the axial lines of the holes directing the discharge tips nearest the holes.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: March 4, 2014
    Inventors: Xiang Gao, Zhongyang Luo, Kefa Cen, Mingjiang Ni, Zuliang Wu, Yi Zhong, Yongxin Zhang, Dian Xu, Weihong Wu, Zhenglun Shi, Jinsong Zhou, Mengxiang Fang, Chunjiang Yu, Shurong Wang, Leming Cheng, Qinhui Wang
  • Publication number: 20130068285
    Abstract: The present invention discloses a method and device for two-stage solar concentration and a spectrum splitting dish reflector based on dish concentration. A parabolic dish reflector is provided with a central light hole. A CPV panel and a solar-to-heat receiver are positioned at the two sides of the axial line of dish reflector, respectively, under the light hole. A splitting lens is placed at a certain distance from the apex of dish reflector over the light hole. The splitting film is applied to the curved surface of the lens near the parabolic dish, as a spectrum splitting surface. The curved surface of the lens far from the parabolic dish is covered by silver, as a reflecting surface. A supporting structure is provided between the dish reflector and the splitting lens. The whole system with a dual-axis tracking system is placed on the foundation of a support.
    Type: Application
    Filed: June 30, 2011
    Publication date: March 21, 2013
    Applicant: ZHEJIANG UNIVERSITY
    Inventors: Mingjiang Ni, Gang Xiao, Zhongyang Luo, Kefa Cen, Xiang Gao, Mengxiang Fang, Jinsong Zhou, Zhenglun Shi, Leming Cheng, Qinhui Wang, Shurong Wang, Chunjiang Yu
  • Publication number: 20110296996
    Abstract: A free radical injection ionizer for flue gas treatment with corona discharge comprises an injection device for releasing free radical source substances and an electrode device for producing corona, wherein the injection device and the electrode device are arranged separately, wherein the electrode device comprises a conductive pole, and discharge tips arranged on the upper and lower sides of the conductive pole at equal intervals, and the injection device comprises nozzles symmetrically arranged on two sides of the electrode device, and two lines of holes axially arranged on the walls of the nozzles nearby the electrode device, the axial lines of the holes directing the discharge tips nearest the holes.
    Type: Application
    Filed: May 7, 2010
    Publication date: December 8, 2011
    Inventors: Xiang Gao, Zhongyang Luo, Kefa Cen, Mingjiang Ni, Zuliang Wu, Yi Zhong, Yongxin Zhang, Dian Xu, Weihong Wu, Zhenglun Shi, Jinsong Zhou, Mengxiang Fang, Chunjiang Yu, Shurong Wang, Leming Cheng, Qinhui Wang