Patents Assigned to Doosan Heavy Industries & Construction Co., Ltd.
  • Patent number: 10526669
    Abstract: The present invention relates to a method and system for recovering carbonate from steel slag, in which it is possible to extract carbonate from steel slag and reuse the extracted carbonate, and to recycle steel slag and make use of CO2 gas without emission to the atmosphere. Since unreacted metal ions and an acidic solvent are reused in the method and system, it is possible to increase carbonate extraction efficiency and reduce an amount of waste.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: January 7, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventors: Jang Yong You, Ja Hyung Koo, Kwang Hee Shin, You Seok Kim
  • Patent number: 10526925
    Abstract: The present invention relates to a supercritical CO2 power generation system of a series recuperative type. According to an embodiment of the present invention, an inlet temperature of a turbine can be increased to increase a work of the turbine, thereby realizing a cycle design having improved turbine efficiency. Further, the number and diameter of pipes connected to a heat exchanger using an external heat source can be reduced to reduce the plumbing related costs, thereby improving economical efficiency.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: January 7, 2020
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventors: Byoung Gu Bak, Seung Gyu Kang, Jeong Ho Hwang, Eung Chan Lee, Cheol Rae Jeong
  • Patent number: 10519970
    Abstract: A compressor blade locking device can include: a first support including a first locking groove; a second support including a left groove and a first protrusion corresponding to the first locking groove; a third support including a second locking groove; a fourth support including a right groove and a second protrusion corresponding to the second locking groove; a center support disposed between the second support and the fourth support; and a tab disposed in the center support, wherein the tab is configured to be turned such that the tab is disposed in the left groove and the right groove.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: December 31, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventors: Matthew Montgomery, Iurii Goroshchak, Joohwan Kwak
  • Patent number: 10520192
    Abstract: An air flow guide cap for inducing an air flow into a through hole of the floor includes: an upper surface upwardly inclined relative to a horizontal plane; and a wall surface downwardly extending along edges of the upper surface except the edge adjacent to an air inlet.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: December 31, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventors: Youngsam Shim, Donggon Lee
  • Patent number: 10519789
    Abstract: A locking spacer, which is fitted in a dovetail slot provided on an outer circumferential surface of a disk put on a rotor shaft, includes: a pair of first blocks each provided with a dovetail joint and a stepped seating surface with a first bolt hole, and configured to have a size occupying a portion of an internal space of the dovetail slot; a second block having a size to be inserted into a remaining portion of the internal space of the dovetail slot, and having a height corresponding to the seating surfaces; a fixing plate seated on both the seating surfaces of the first blocks and an upper surface of the second block, and provided with second bolt holes corresponding to the first bolt holes; and a bolt screwed into the first bolt hole through an associated second bolt hole.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: December 31, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Joohwan Kwak
  • Patent number: 10518274
    Abstract: Disclosed herein is a flocculation basin inclusion ion type water treatment apparatus using dissolved air floatation which includes: a flocculation basin which forms flocs by mixing a coagulant inserted into feed water and grows up the flocs; a contact zone to which fine bubbles are induced through a nozzle disposed at a lower part; and a separation zone which removes the flocs when the fine bubbles are attached to the flocs and the flocs float on the surface of water, the flocculation basin inclusion type water treatment apparatus including: a fine bubble forming part.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: December 31, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventors: Sung Won Park, Byung Sung Park
  • Patent number: 10508557
    Abstract: A gas turbine includes protrusions provided on perimeters of front and rear surfaces of the turbine disk, a first retainer unit having openings at positions corresponding to the respective protrusions provided on the front surface of the turbine disk, and a second retainer unit having a first end thereof disposed in a first insert slot of the turbine disk and a second end thereof disposed in the second insert slot of turbine blades to fix the plurality of turbine blades to the turbine disk.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: December 17, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd.
    Inventor: Sung Chul Jung
  • Patent number: 10502078
    Abstract: A gas turbine includes a bearing housing surrounding an outside of a tie rod provided on the turbine. One end of a power strut is connected to an outside of the bearing housing, and the other end is radially arranged outwards. A cooling-air supply unit supplies cooling air to the power strut. A heat exchange unit is disposed in the power strut to perform a heat exchange process with cooling air supplied through the cooling-air supply unit. A ring-shaped support frame is connected to the other end of the power strut.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: December 10, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd.
    Inventors: Sung Chul Jung, Young Chan Yang
  • Patent number: 10502326
    Abstract: A control valve includes a main body encasing a vapor channel configured to supply pressurized vapor from an evaporator to a turbine; an control unit, disposed in the vapor channel of the main body, for controlling an amount of vapor supplied to the turbine; and a load distributor, disposed between the control unit and the main body, for sealing the main body and for distributing to the main body a load applied to the control unit by the pressurized vapor in the vapor channel. The load distributor being fitted between the control unit and the main body enables the main body to be sealed, while distributing a load that has conventionally been concentrated on the cover and the cover studs. Since a load is distributed to the main body, a control valve for power generation systems can be designed with a smaller cover and smaller cover studs.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: December 10, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Hyun Chul Lee
  • Patent number: 10495311
    Abstract: Disclosed herein are a transition part assembly which is improved in efficiency of cooling a high-temperature region formed on a side surface of a transition part of a gas turbine, and a combustor including the same. The transition part assembly includes a transition part, a collision sleeve, a cooling hole, and a guide which is formed inside the collision sleeve so as to guide air to a side surface of the transition part.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: December 3, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Young Sam Shim
  • Patent number: 10494282
    Abstract: Disclosed is a bioreactor for treating sewage comprising an aerobic tank including a mixing cell for receiving sewage to be supplied from an inlet and mixing the sewage with activated sludge and an aerobic reactor tank in which the activated sludge adsorbs organic substance existing in the sewage; a backwashing cartridge filter for removing floc resulting from growth of the activated sludge adsorbing the organic substance; and an anaerobic tank for carrying out a denitrification process for denitrifying treated water flowed through the backwashing cartridge filter using anaerobic ammonium oxidation (anammox) bacteria wherein the backwashing cartridge filter allows the sewage discharged from the aerobic tank to pass through the cartridge filter and separates the floc and the treated water using difference in size between the floc contained in the sewage and pores in the cartridge filter, and wherein foreign matter adsorbed on the cartridge filter is easily removed by means of washing water to be injected into
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: December 3, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventors: Hwan Chul Cho, Seong Ju Kim, Yang Oh Jin, Chul Woo Lee
  • Patent number: 10481034
    Abstract: An apparatus for diagnosing abnormal operation of a rotor. The apparatus includes a first sensor provided around a shaft in order to detect vibration occurring while the shaft provided in a rotor axially rotates, a second sensor to generate a periodic pulse signal over time whenever the shaft rotates once, and a controller to determine an operation state of the rotor by receiving signals detected by the first and second sensors. When an aperiodic pulse signal is detected in the rotor, the controller determines a position of the rotor at which the aperiodic pulse signal is generated, and a display indicates the position of the rotor in which the aperiodic pulse signal is generated, according to information calculated by the controller.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: November 19, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventors: Jong Duk Son, Eun Sung Jang, Gang Ju Lee, Seung Man Eom
  • Patent number: 10480344
    Abstract: A valve module is provided in a steam turbine and a power generation system. The valve module includes a stop valve, a control valve, and a case. The stop valve includes a stem to reciprocate rectilinearly between a first position and a second position, a stop valve disc mounted to an upper portion of the stem, to pass fluid when the stem is in the first position and to block fluid flow when the stem is in the second position, and a sealing member surrounding the stem and configured to prevent exposure of the stem when the stop valve disc is located at the first position. The valve module is capable of protecting a stem from high-pressure fluid that is introduced to the stop valve.
    Type: Grant
    Filed: April 11, 2018
    Date of Patent: November 19, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Hyunchul Lee
  • Patent number: 10480339
    Abstract: A sealing assembly includes a first sealing member disposed on a fixed body and a second sealing member disposed on a rotating body while facing the first sealing member, such that when the second sealing member rotates, the first sealing member and the second sealing member work in conjunction with each other to generate flow of fluid in a reverse direction and form a fluid barrier, thereby preventing leakage of the fluid.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: November 19, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Kyung Kook Kim
  • Patent number: 10472991
    Abstract: A foreign substance removal apparatus for a gas turbine includes a combustor casing having a first cooling air passage formed in a tangential direction of a combustor in a gas turbine in order to move cooling air into the combustor, a first foreign substance collection unit disposed on a flow path in the first cooling air passage in order to primarily filter foreign substances contained in the cooling air, a second cooling air passage extending radially toward a turbine blade in a circumferential direction of a torque tube located in the combustor, and a second foreign substance collection unit disposed on a flow path in the second cooling air passage and communicating with the second cooling air passage to secondarily filter foreign substances contained in the cooling air introduced through the first cooling air passage.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: November 12, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Kyung Kook Kim
  • Patent number: 10471392
    Abstract: A membrane filtration system and a membrane bio reactor including the same are described. In an example, the membrane filtration system includes: a treatment tank; a membrane support frame disposed in the treatment tank and mounted with a separation membrane; a separation membrane module mounted on the membrane support frame; a vane member disposed at a lower end of the membrane support frame and provided to lift sludge accumulated at a lower part of the treatment tank; and a reciprocating portion connected to the membrane support frame and reciprocating the membrane support frame, in which the separation membrane module includes an upper frame and a lower frame and a hollow fiber membrane installed between the upper frame and the lower frame.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: November 12, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Woo Nyoung Lee
  • Patent number: 10465699
    Abstract: A compressor blade locking device can include: a first support including a first locking groove; a second support including a second locking groove; an upper plate disposed in the first locking groove and the second locking groove; and a plurality of bolts passing through the upper plate and coupled with the first support and the second support. The compressor blade locking device can further include a center support interposed between the first support and the second support.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: November 5, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventors: Matthew Montgomery, Iurii Goroshchak, Joohwan Kwak, Andrii Ievdoshyn
  • Patent number: 10463992
    Abstract: A high-rate sedimentation tank includes a hopper configured to be supplied with raw water including floc, at least one circular orifice pipe disposed at a lower portion of the hopper and configured to have the floc deposited therein as a sludge while passing the floc included in the raw water therethrough, and a sludge outlet configured to discharge the sludge deposited by passing through the circular orifice pipe to an outside of the hopper.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: November 5, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventors: Jine Hee Min, Chul Woo Lee, Youngjun Ro
  • Patent number: 10456796
    Abstract: Disclosed herein are a spray nozzle for an attemperator and an attemperator including the spray nozzle. An attemperator according to an embodiment includes: a steam transfer pipe through which steam is transferred; a fixed pipe which is fixed to an outer surface of the steam transfer pipe; and a spray nozzle, which is coupled to the fixed pipe, disposed in the steam transfer pipe and configured to spray cooling water into the steam transfer pipe. The spray nozzle includes, on an outer circumferential surface thereof, at least one support that protrudes toward the fixed pipe. The spray nozzle is spaced apart from the fixed pipe.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: October 29, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd.
    Inventors: Dong Wook Kim, Kyu Man Kim, Woo Seong Song, Jae Cheol Kim, Cheol Hong Kim, Tae Jun Yun, Seong Yong Jeong
  • Patent number: 10450864
    Abstract: Disclosed herein is a cooling apparatus of a gas turbine including a compressor disk unit mounted in a gas turbine and provided with compressor cooling passages; the torque tube units provided in an adhering state to each other while being adjacent to the compressor disk unit and provided with a cooling air supply passage communicating with the compressor disk cooling passage; and a turbine disk unit provided with a turbine disk cooling passage communicating with the cooling air supply passage of the torque tube unit, in which the torque tube units are disposed between the compressor disk unit and the turbine disk unit and coupled therewith in an adhering state to each other along an axial direction of a rotation shaft mounted in the gas turbine and the cooling air supply passage is open in horizontal direction along the axial direction from an edge of the torque tube unit.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: October 22, 2019
    Assignee: Doosan Heavy Industries Construction Co., Ltd
    Inventor: Kyung Kook Kim