Patents Assigned to Doosan Heavy Industries & Construction Co., Ltd.
  • Automatic filter cleaning apparatus, automatic filter cleaning method using the same, and supercritical fluid power generation system including the same
    Patent number: 10668412
    Abstract: A supercritical fluid power generation system includes an automatic filter cleaning apparatus, which is used in an automatic filter cleaning method. The system includes a cooler configured to cause a phase change of a working fluid from a gaseous state to a liquid state or to cool the working fluid to a low temperature; a fluid pump configured to receive and compress the working fluid from the cooler; a heat exchanger configured to heat the working fluid via a heat exchange with the working fluid which has passed through the fluid pump; at least one turbine configured to expand the heated working fluid and connected to a generator to produce electric power; a plurality of transport pipes in which the working fluid flows; and plural filter lines configured to remove, via back-flushing, a foreign substance included in the working fluid present in at least one of the transport pipes.
    Type: Grant
    Filed: March 25, 2018
    Date of Patent: June 2, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Songhun Cha
  • Membrane filtration system and membrane bioreactor including the same
    Patent number: 10668434
    Abstract: A membrane filtration system, capable of effectively removing foreign matter attached to a separation membrane while saving energy by reciprocating the separation membrane, includes a treatment bath, a membrane support frame disposed in the treatment bath, a separation membrane module installed in the membrane support frame, a reciprocating part connected with the membrane support frame to reciprocate the membrane support frame, a sludge floating part disposed on a lower end of the membrane support frame to float sludge accumulated in the treatment bath, and a control part controlling a reciprocating distance or frequency of the separation membrane module.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: June 2, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Woo Nyoung Lee
  • Membrane filtration system and membrane bioreactor including the same
    Patent number: 10668433
    Abstract: A membrane filtration system, capable of effectively removing foreign matter attached to a separation membrane while saving energy by reciprocating the separation membrane, includes a treatment bath, a membrane support frame disposed in the treatment bath, a separation membrane module installed in the membrane support frame, a reciprocating part connected with the membrane support frame to reciprocate the membrane support frame, and a sludge floating part disposed on a lower end of the membrane support frame to float sludge accumulated in the treatment bath, and a filtered-water discharge part discharging filtered water that has been filtered via the separation membrane module. The filtered-water discharge part is formed to be movable or stretchable in response to a reciprocating motion of the membrane support frame.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: June 2, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Woo Nyoung Lee
  • Acoustic dampening liner cap and gas turbine combustor including the same
    Patent number: 10670271
    Abstract: A gas turbine combustor includes a combustion chamber, a liner adjacent to the combustion chamber, a liner cap capping the combustion chamber, and a swirler cup passing through the liner cap. The liner cap includes a first cavity having a first inlet receiving an air, a second cavity having a first outlet facing the combustion chamber, and an impingement plate between the first cavity and the second cavity. The air flows from the first inlet to the combustion chamber through the first cavity, the impingement plate, and the second cavity.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: June 2, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Esam Abu-Irshaid
  • Heat transfer tube having superhydrophobic surface and method for manufacturing the same
    Patent number: 10663237
    Abstract: The present disclosure relates to a heat transfer tube comprising nanostructures formed on the surface, and a method for manufacturing the same, and by forming nanostructures on a heat transfer tube surface, a superhydrophobic surface may be obtained under a high temperature environment as well. In addition, superhydrophobicity may be enhanced by further forming a hydrophobic coating layer on the nanostructure-formed heat transfer tube surface. By using a method of forming nanostructures by dipping the heat transfer tube surface, complex shapes may be coated, and therefore, a plurality of assembled heat transfer tubes may be coated, and damages occurring during a process of assembling the heat transfer tube after coating may be prevented.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: May 26, 2020
    Assignees: Doosan Heavy Industries Construction Co., Ltd., UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Jin Bum Kim, Hyun Sik Kim, Young Suk Nam, Kyoung Hwan Song, Seung Tae Oh, Jae Hwan Shim, Dong Hyun Seo
  • Brush seal assembly
    Patent number: 10663064
    Abstract: A brush seal assembly includes a brush seal, a brush support portion, and an assembly support portion. The brush seal, which has a multitude of bristles forming an angle with respect to a radial direction of a rotating body rotated inside a casing, is disposed around an outer circumferential surface of the rotating body and is oriented with respect to the body's rotating direction. The brush support portion supports the brush seal by extending toward the rotating body while contacting a low-pressure side of the brush seal. The assembly support portion supports the brush seal and the brush support portion and to receive respectively a base end of the brush seal and an axial protrusion of the brush support portion. The brush support portion contacts the brush seal along a predetermined length, which is greater than that of a line following a bristle of the brush seal.
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: May 26, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Mahmut Faruk Aksit
  • Flow conditioner to reduce combustion dynamics in a combustion system
    Patent number: 10663170
    Abstract: A flow conditioner in a combustor of a gas turbine comprises a body and a flow conditioning portion configured to be placed in an air path providing air flow to a combustion chamber, the flow conditioning portion including a plurality of holes tuned to a damping frequency to dampen a pressure fluctuation caused by combustion dynamics from the combustion chamber.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: May 26, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd.
    Inventors: Esam Abu-Irshaid, Kevin Spence
  • Structure for cooling turbine blades and turbine and gas turbine including the same
    Patent number: 10662777
    Abstract: A structure for cooling turbine blades, and a turbine and gas turbine including the same, enhance efficiency in cooling turbine blades by improving the structures of a turbine disk and a retainer for securing a turbine blade. The structure includes a turbine blade connected to a turbine blade root; a turbine disk including a slot for receiving the turbine blade root, a cooling passage through which cooling air flows to the turbine blade root, and a branch passage communicating at one end with the cooling passage; and a retainer fixed to the turbine disk on each of opposite sides of the turbine blade to prevent separation of the turbine blade from the turbine disk, the fixed retainer having a chamber communicating with the other end of the branch passage so that the cooling air of the cooling passage is introduced into the chamber through the branch passage.
    Type: Grant
    Filed: July 5, 2018
    Date of Patent: May 26, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Yun Chang Jang
  • Wind farm, control method thereof and wind power generation unit
    Patent number: 10655599
    Abstract: A wind farm that includes a plurality of wind power generation units. The wind farm further includes a sensing part and a controlling part. The sensing part is configured to sense an external environment risk element. The controlling part is configured to receive a risk signal from the sensing part and to control the wind power generation units in the wind farm.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: May 19, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Sang Woo Woo
  • Retainer for gas turbine blade, turbine unit and gas turbine using the same
    Patent number: 10648350
    Abstract: A retainer for a gas turbine blade that inhibits deviation of a rotating blade mounted on a rotor of a gas turbine, can include: a retainer frame disposed at one side of the rotating blade and configured to form an inside chamber through which cooled air is introduced, between the retainer frame and the rotating blade; a barrier wall formed between the retainer frame and the rotating blade and configured to divide the inside chamber into a plurality of cooling chambers; and a fixing unit disposed at one side of the retainer frame and configured to fix the retainer frame to the rotor.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: May 12, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Jae Hyeong Choi
  • Power plant and method of controlling same
    Patent number: 10648370
    Abstract: Disclosed are a power plant that uses a synchronous generator using a working fluid for generation of electric power, and a method of controlling the power plant, the power plant and the control method having an advantage of preventing damage to the power plant during synchronization with an electrical grid. The power plant comprises a pump for compressing a working fluid, a heat exchanger for heat transfer from an external heat source to the working fluid transferred from the pump, and a power turbine generator for generating a rotational force by using the working fluid heated by the heat exchanger, generating electricity using the rotational force, and supplying the electricity to an electrical grid.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: May 12, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventors: Hwa Chang Sung, Sang Hyeun Kim, Song Hun Cha
  • Membrane filtration system and membrane bioreactor including the same
    Patent number: 10639589
    Abstract: A membrane filtration system, capable of effectively removing foreign matter attached to a separation membrane while saving energy by reciprocating the separation membrane, includes a treatment bath, a membrane support frame disposed in the treatment bath, a separation membrane module installed in the membrane support frame, a reciprocating part connected with the membrane support frame to reciprocate the membrane support frame, and a sludge floating part disposed on a lower end of the membrane support frame to float sludge accumulated in the treatment bath. The separation membrane module includes an upper frame, a lower frame, and a hollow fiber membrane provided between the upper frame and the lower frame.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: May 5, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd.
    Inventor: Woo Nyoung Lee
  • Supercritical CO2 power generating system for preventing cold-end corrosion
    Patent number: 10641132
    Abstract: A supercritical CO2 power generating system prevents cold-end corrosion capable of improving reliability against cold-end corrosion by including a recirculation pump. Part of the working fluid heated in the low-temperature-side external heat exchanger using the recirculation pump is mixed with the low-temperature working fluid at the rear end of the pump, to heat the working fluid above the temperature of the dewpoint of the waste heat gas. The heated working fluid is then supplied to the external heat exchanger. By reducing the cold-end corrosion phenomenon of the low-temperature-side external heat exchanger, the life of the external heat exchanger can be increased and the reliability of the external heat exchanger and the supercritical CO2 power generating system can be improved.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: May 5, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Song Hun Cha
  • Nozzle box assembly
    Patent number: 10633991
    Abstract: A nozzle box assembly includes steam inlets, a torus part, and a steam path ring. Working steam is supplied through the steam inlets. The torus part is connected to the steam inlets so as to form an annular steam path and having an opening portion, in which a part of the annular steam path is opened. The steam path ring is connected to the opening portion so as to provide a path, which is connected to a stage, and provided with a plurality of vanes. The steam path ring is directly connected to the opening portion.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: April 28, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventors: Dongwoo Kang, Dong Il Kim, Haesang Jeong, Cheolhong Kim
  • Disk assembly and turbine including the same
    Patent number: 10633973
    Abstract: A disk assembly includes a first disk, a second disk and a third disk. The first disk is engaged with a compressor section of a gas turbine. The second disk is engaged with a turbine section of the gas turbine. The third disk is disposed between the first and second disks and transfers a rotational torque applied to the second disk to the first disk. A through-hole is defined through the third disk along an axial direction of the gas turbine. A distance between the third disk and a tie rod is less than each of distances between the first and second disks and the tie rod, such that spaces are defined by surfaces of the third disk respectively in communication with the compressor section and the turbine section.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: April 28, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Kyung Kook Kim
  • Turbine vane having impingement plate for gas turbine and gas turbine including the same
    Patent number: 10633982
    Abstract: A gas turbine includes a housing; a rotor rotatably provided in the housing; a turbine blade to receive rotating force from combustion gas and rotate the rotor; a turbine vane to guide a flow of the combustion gas toward the turbine blade, the turbine vane having a turbine vane cooling passage for delivering cooling fluid to an inner wall of the turbine vane; and an impingement plate installed in the turbine vane cooling passage, the impingement plate having a plurality of injection holes through which the cooling fluid is injected onto the inner wall of the turbine vane, the injection holes formed at predetermined locations of the impingement plate, wherein the injection holes are formed differently depending on locations of the injection holes. A temperature gradient or thermal stress may be prevented from occurring in the turbine vane that is cooled by cooling fluid ejected from the impingement plate.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: April 28, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Myeong Hwan Bang
  • Rotating body, method of manufacturing the same, and steam turbine including the same
    Patent number: 10626737
    Abstract: A rotatable body includes a rotor and n buckets, each bucket being coupled to the rotor in a tangential entry manner. The rotor supports each of the n buckets coupled to the rotor, so the buckets may be stably coupled to the rotor, using a unified annular dovetail tenon that protrudes axially from the rotor. Each bucket includes a bucket dovetail mortise for engaging with the unified annular dovetail tenon in order to couple the bucket to the rotor. A method of manufacturing the rotatable body includes assembling first to (n?1)th buckets with the rotor wheel by successively inserting the first to (n?1)th buckets through the tangential entry; assembling the nth bucket with the adapter; assembling the adapter with the rotor wheel, by inserting the adapter assembled with the nth bucket into the tangential entry; and collectively moving all the buckets by one half pitch in the circumferential direction.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: April 21, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventors: Jae Min Ju, Seok Jin Jang
  • Rotating part, method of fabricating the same, and steam turbine including the same
    Patent number: 10626738
    Abstract: A rotatable body includes a rotor and n buckets, each bucket being coupled to the rotor in a tangential entry manner. The rotor supports each of the n buckets coupled to the rotor, so the buckets may be stably coupled to the rotor, using a unified annular dovetail tenon that protrudes axially from the rotor. Each bucket includes a bucket dovetail mortise for engaging with the unified annular dovetail tenon in order to couple the bucket to the rotor. A method of manufacturing the rotatable body includes assembling first to (n?1)th buckets with the rotor wheel by successively inserting the first to (n?1)th buckets through the tangential entry; assembling the nth bucket with the adapter; assembling the adapter with the rotor wheel, by inserting the adapter assembled with the nth bucket into the tangential entry; and collectively moving all the buckets by one half pitch in the circumferential direction.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: April 21, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Jae Min Ju
  • Sequencing batch reactor for sewage treatment and sewage treatment system comprising same
    Patent number: 10626035
    Abstract: Disclosed is a sequencing batch reactor (SBR) for sewage treatment. The SBR is applicable to an energy-producing sewage treatment system. The SBR includes a treatment tank and a hybrid bacterial strain screening tank. The treatment tank removes ammonium contained in supernatant liquid using anaerobic ammonium-oxidizing (anammox) bacteria. The hybrid bacterial strain screening tank screen anammox bacteria granules out by passing the supernatant liquid discharged from the treatment tank through the hybrid bacterial strain screening tank. The SBR generates biogas using the anammox bacteria and reduces the nitrogen content in the supernatant liquid. The SBR can separate the anammox bacteria granules with high separation efficiency, thereby shortening sewage treatment time and recycling activated sludge, resulting in a dramatic decrease in the amount of waste sludge.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: April 21, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventors: Hwan Chul Cho, Seong Ju Kim, Yang Oh Jin, Chul Woo Lee
  • Measuring apparatus and method of operating a measuring apparatus for membrane fouling index
    Patent number: 10613018
    Abstract: A device for measuring the membrane fouling index which can measure the modified fouling index (MFI) and the silt density index (SDI) at the same time and quantify the degree of membrane fouling caused by various kinds of membrane fouling materials, such as particulate materials, colloids, organic matters, and so on, in a short period of time.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: April 7, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventors: Jong Hyuk Moon, Yang Oh Jin, Hyun Sung Choi, Sung Hoon Kim