WO2019117477A1 - Appareil de récupération de chaleur sensible de gaz d'échappement - Google Patents

Appareil de récupération de chaleur sensible de gaz d'échappement Download PDF

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Publication number
WO2019117477A1
WO2019117477A1 PCT/KR2018/013735 KR2018013735W WO2019117477A1 WO 2019117477 A1 WO2019117477 A1 WO 2019117477A1 KR 2018013735 W KR2018013735 W KR 2018013735W WO 2019117477 A1 WO2019117477 A1 WO 2019117477A1
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WIPO (PCT)
Prior art keywords
duct
heat exchanger
exhaust
exhaust gas
heat
Prior art date
Application number
PCT/KR2018/013735
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English (en)
Korean (ko)
Inventor
박주형
조한창
오혁진
Original Assignee
주식회사 포스코
재단법인 포항산업과학연구원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from KR1020170171823A external-priority patent/KR102043025B1/ko
Priority claimed from KR1020170178467A external-priority patent/KR102285076B1/ko
Application filed by 주식회사 포스코, 재단법인 포항산업과학연구원 filed Critical 주식회사 포스코
Publication of WO2019117477A1 publication Critical patent/WO2019117477A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels

Definitions

  • the present invention relates to an exhaust gas heat recovery apparatus.
  • the heat recovery of the heat recovery heat exchanger can be partially blocked, but the efficiency of heat recovery is low and the investment cost is increased due to installation of a large number of valves, dampers, sensors and IDFs.
  • a flue gas sensible heat recovery apparatus capable of preventing heat damage to a heat exchanger, improving stability, and increasing heat recovery efficiency.
  • the exhaust gas heat recovery apparatus includes a main pipe through which flue gas flows, an outside air supply pipe connected to the main pipe and having a first opening / closing valve, A first temperature sensor disposed in the mixing section or at a rear stage of the mixing section, and a second temperature sensor disposed at a rear stage of the mixing section on the flow path of the flue gas, wherein the flue gas or the mixed gas of the flue gas and the outside air
  • a heat exchanger having a heat exchanger for exchanging heat and a suction fan installed in a main pipe to be disposed at a rear end of the heat exchanger.
  • the exhaust gas heat recovery apparatus may further include a bypass pipe connected to the main pipe to be disposed at a rear end of the first temperature sensor, and the heat exchanger may be connected to the bypass pipe.
  • the main pipe is provided with a second on-off valve installed in the main pipe so as to be disposed between the bypass pipe and the main pipe.
  • the bypass pipe is provided with a bypass pipe 3 opening / closing valve may be provided.
  • the heat exchanger may include a pipe for a heat transfer fluid connected to the heat exchanger.
  • the heat exchange unit may further include a pump installed in the piping for the heat transfer fluid.
  • the heat exchanger may further include a second temperature sensor installed in a pipe for the heat transfer fluid so as to be disposed at a rear end of the heat exchanger.
  • the piping for the heat transfer fluid may be connected to the heat exchanger for the heat pipe.
  • the heat exchanger may be installed in the bypass pipe, and the heat exchanger may include a pipe for the heat transfer fluid connected to the heat exchanger.
  • the heat exchanger may be connected to the bypass pipe, and may be disposed so that a transfer member for transferring the solid passes therethrough.
  • the heat exchanger may further include a third temperature sensor installed in the heat exchanger.
  • the main pipe may be provided with a dust collecting device disposed at a front end of the suction fan.
  • the main pipe may be provided with a pressure sensor disposed at a front end of a connection portion of the outside air supply pipe.
  • the main pipe may be provided with a temperature sensor for the inlet part disposed at the front end of the connection part of the outside air supply pipe.
  • the exhaust gas heat recovery apparatus may further include a controller connected to the first temperature sensor and the first opening / closing valve.
  • the heat exchanger may be connected to the main pipe so as to be disposed at a rear end of the first temperature sensor.
  • the exhaust gas heat recovery apparatus may further include a bypass pipe having one end connected to the main pipe at a front end of the heat exchanger and the other end connected to the main pipe at a rear end of the heat exchanger.
  • the main pipe is provided with a second opening / closing valve disposed at a rear end of the heat exchanger, and the bypass pipe may be provided with a third opening / closing valve.
  • the heat exchanging unit may include a pipe for the heat transfer fluid connected to the heat exchanger and a second temperature sensor installed in the pipe for the heat transfer fluid to be disposed at the rear end of the heat exchanger.
  • the heat exchanger may further include a fourth temperature sensor for measuring a temperature of a solid conveyed through the conveying member, wherein the conveying member for conveying the solid passes through the heat exchanger.
  • an exhaust gas heat recovery apparatus comprising: an exhaust unit connected to a heat facility for exhausting exhaust gas and including an exhaust duct through which exhaust gas discharged from a heat facility flows; A waste heat recovery unit connected to the exhaust duct to recover waste heat from the exhaust gas so that exhaust gas flowing into the exhaust duct bypasses a part of the exhaust duct and then returns to the exhaust duct; An outside air inflow unit connected to the waste heat recovery unit so that outside air flows into the waste heat recovery unit; And a control unit for controlling the exhaust unit, the waste heat recovering unit and the outside air inflow unit so that the temperature of the exhaust gas flowing into the heat exchanger bypassing a part of the exhaust duct is maintained within a predetermined temperature range by the outside air introduced through the outside air inflow unit ; . ≪ / RTI >
  • the waste heat recovering unit may include a first bypass duct connected to the exhaust duct and the heat exchanger so that exhaust gas flows from the exhaust duct to the heat exchanger, and an exhaust gas passing through the heat exchanger is returned to the exhaust duct And a second bypass duct connected to the heat exchanger and the exhaust duct.
  • the outside air inflow unit may include an outside air inflow duct connected to the outside and the first bypass duct, and an outside air duct opening / closing damper provided in the outside air inflow duct to open / close the outside air inflow duct.
  • the exhaust unit may further include an exhaust duct opening / closing damper provided in the exhaust duct to open / close the exhaust duct
  • the waste heat recovering unit may include a first bypass duct provided in the first bypass duct to open / And a second duct opening / closing damper provided in the second bypass duct for opening and closing the second bypass duct.
  • the exhaust duct opening / closing damper is provided at a portion of the exhaust duct between a portion to which the first bypass duct is connected and a portion to which the second bypass duct is connected, and the outside air inlet duct has a flow direction May be connected to a portion of the first bypass duct before the first duct opening / closing damper.
  • the waste heat recovering unit includes a heat exchange medium inlet duct connected to the heat exchanger so that the heat exchange medium flows to the heat exchanger, and a heat exchange medium that has recovered waste heat by heat exchange with the exhaust gas while passing through the heat exchanger, passes through the heat exchanger And a heat exchange medium discharge duct connected to the heat exchanger to be supplied to the waste heat utilization site.
  • a first temperature sensor for sensing the temperature of the exhaust gas flowing into the exhaust duct may be provided at a portion of the exhaust duct before the first bypass duct is connected in the flow direction of the exhaust gas
  • a second temperature sensor may be provided at a portion of the first bypass duct between the duct opening / closing damper and the heat exchanger to sense the temperature of the exhaust gas flowing to the heat exchanger.
  • the control unit opens the first duct opening / closing damper and the second duct opening / closing damper and closes the exhaust duct opening / closing damper so that the exhaust gas flowing into the exhaust duct bypasses the heat exchange medium, Exchanged with the heat exchange medium while passing through the heat exchanger, and then returned to the exhaust duct.
  • the control unit opens the outside air duct opening / closing damper to allow the outside air to flow into the first bypass duct through the outside air inlet duct And the opening degree of the outside air duct opening / closing damper is adjusted so that the temperature of the exhaust gas sensed by the second temperature sensor is within a predetermined temperature range.
  • the control unit controls the exhaust duct by the outside air introduced through the outside air inlet unit It is possible to prevent the temperature of the flowing exhaust gas from exceeding the predetermined allowable temperature.
  • the control unit opens the outside air duct opening / closing damper to open the outside air inlet opening / closing damper and the exhaust duct through the outside air inlet duct and the first bypass duct, So that the outside air can be introduced.
  • the control unit may completely close the exhaust duct opening / closing damper after a predetermined time after completely opening the first duct opening / closing damper and the second duct opening / closing damper.
  • the control unit opens the exhaust duct opening / closing damper and closes the first duct opening / closing damper and the second duct opening / closing damper so that the exhaust gas flowing into the exhaust duct flows through the exhaust duct to be discharged to the outside,
  • the medium can be prevented from passing through the heat exchanger.
  • the control unit may completely open the first duct opening / closing damper and the second duct opening / closing damper so that the exhaust duct opening / closing damper is fully opened after a predetermined time.
  • FIG. 1 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to a first embodiment of the present invention.
  • FIG. 2 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to a second embodiment of the present invention.
  • FIG. 3 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to a third embodiment of the present invention.
  • FIG. 4 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to a fourth embodiment of the present invention.
  • FIG. 5 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to a fifth embodiment of the present invention.
  • FIG. 6 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to a sixth embodiment of the present invention.
  • FIG. 7 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to a seventh embodiment of the present invention.
  • FIG. 8 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to an eighth embodiment of the present invention.
  • FIG. 9 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to a ninth embodiment of the present invention.
  • FIGS 10 to 13 are views showing the operation of the exhaust gas heat recovery apparatus according to the ninth embodiment of the present invention.
  • FIG. 1 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to a first embodiment of the present invention.
  • the flue gas sensible heat recovery apparatus 100 includes a main pipe 110, an outside air supply pipe 120, a mixing unit 130, a first temperature sensor 140, A bypass pipe 150, a heat exchanger 160, a suction fan 170, a dust collector 180, and a controller 190.
  • the main pipe 110 may be connected to a thermal facility such as a boiler including a power plant and an industrial furnace such as a combustion furnace, an electric furnace, and the like.
  • a pressure sensor 111 may be installed in the main pipe 110 so that the main pipe 110 is located at the inlet of the flue gas inlet, that is, at the front end of the portion where the outside air supply pipe 120 is connected.
  • the pressure sensor 111 is connected to the control unit 190 and transmits a signal to the control unit 190 about the inflow pressure of the flue gas flowing into the main pipe 110.
  • control unit 190 controls the suction fan 170 to control the pressure of the shearing facility and to control the inflow amount of the flue gas.
  • the inlet pipe temperature sensor 113 may be installed in the main pipe 110 so as to be disposed adjacent to the exhaust gas inlet side of the main pipe 110, that is, adjacent to the pressure sensor 111.
  • the temperature sensor 113 for the inlet portion detects the temperature of the incoming flue gas when the temperature of the flue gas is suddenly raised or lowered and finally detects the temperature of the outside portion of the outside air supplied from the outside air supply pipe 120 to maintain the temperature of the mixing portion 130 at a predetermined temperature.
  • And may be installed in the main pipe 110 to determine the inflow amount in advance.
  • the outside air supply pipe 120 is connected to the main pipe 110 and supplies the outside air to the main pipe 110.
  • the outside air supply pipe 120 is provided with a first opening / closing valve 122.
  • the first on-off valve 122 is also connected to the controller 190 so that the first on-off valve 122 can be opened or closed according to a signal from the first temperature sensor 140.
  • the mixing portion 130 is installed in the main pipe 110 so as to be disposed at the rear end of the portion to which the outside air supply pipe 120 is connected. That is, the mixing unit 130 is a region where the exhaust gas supplied from the main pipe 110 and the outside air supplied from the outside air supply pipe 120 are mixed.
  • the mixing unit 130 may have a chamber shape, a mixer shape, have. Since the mixing unit 130 is disposed in the main pipe 110, even if the inflow amount of the flue gas rapidly increases or the temperature of the flue gas abruptly increases, the flue gas and the outside air are mixed in advance in the mixing unit 130, The thermal shock caused by the heat applied to the heat sink can be mitigated.
  • the first temperature sensor 140 is installed in the main pipe 110 so as to be disposed at the rear end of the mixing unit 130.
  • the first temperature sensor 140 measures the temperature of the gas flowing through the main pipe 110 through the mixing unit 130. Meanwhile, the first temperature sensor 140 may be connected to the controller 190.
  • the control unit 190 operates the first opening / closing valve 122 of the outside air supply pipe 120 according to a signal from the first temperature sensor 140.
  • the first temperature sensor 140 is disposed downstream of the mixing unit 130 installed in the main pipe 110 to measure the temperature of the mixed gas of the exhaust gas and the outside air passing through the mixing unit 130, 130 are controlled.
  • the first temperature sensor 140 is disposed at the rear end of the mixing unit 130 in the present embodiment, the first temperature sensor 140 is not limited to the first temperature sensor 140, It is possible.
  • the bypass pipe 150 is connected to the main pipe 110 so as to be disposed at the rear end of the first temperature sensor 140.
  • the bypass piping 150 includes a first bypass piping 152 for allowing the flue gas to flow from the main piping 110 to the heat exchanging unit 160 and a second bypass piping 152 for allowing the exhaust gas to flow from the heat exchanging unit 160 to the main piping 110 And a second bypass pipe 154 may be provided.
  • the amount of inflow of the flue gas into the bypass piping 150 is controlled by the second on-off valve 112 installed in the main piping 110 and the third on-off valve 112 installed in the second bypass piping 154 of the bypass piping 150. [ And can be adjusted by the opening / closing valve 156.
  • the exhaust gas flows only through the main pipe 110 without flowing along the bypass pipe 150.
  • the second on-off valve 112 is closed and the third on-off valve 156 is opened, the exhaust gas flows along the bypass pipe 150 and does not flow through the main pipe 110.
  • the opening / closing degree of the second and third opening / closing valves 112 and 156 can be adjusted to control the inflow amount of the exhaust gas flowing into the bypass pipe 150.
  • the heat exchanging unit 160 includes a heat exchanger 162 connected to the bypass pipe 150.
  • the heat exchanger 160 is connected to the heat exchanger 162 and passes through the heat transfer fluid pipe 164 through which the heat transfer fluid flows, the pump 166 installed in the heat transfer fluid pipe 164, and the heat exchanger 162 And a second temperature sensor 168 installed in the heat transfer fluid pipe 164 to measure the temperature of one heat transfer fluid.
  • the second temperature sensor 168 is also connected to the control unit 190.
  • the control unit 190 controls the second and third on-off valves 112 and 156 according to a signal from the second temperature sensor 168, It is possible to control the display unit 122. Further, the control unit 190 may control the pump 166 according to the signal from the second temperature sensor 168 to control the inflow amount of the heat transfer fluid.
  • the suction fan 170 may be installed in the main pipe 110 so as to be disposed at the rear end of the bypass pipe 150.
  • the suction fan 170 may control the inflow amount of the flue gas. That is, the inflow amount of the flue gas flowing into the main pipe 110 and the pressure of the shearing equipment can be adjusted by the suction fan 170.
  • the dust collecting facility 180 is installed in the main pipe 110 so as to be disposed at the front end of the suction fan 170, and can remove dust and other components from the exhaust gas.
  • the control unit 190 is connected to the first temperature sensor 140 and the first on-off valve 122 and controls the first on-off valve 122 according to a signal from the first temperature sensor 140. In this way, the inflow amount of the outside air is controlled by controlling the first opening / closing valve 122 according to the temperature of the flue gas sensed by the first temperature sensor 140 or the mixed gas of the exhaust gas and the outside air. Therefore, the temperature of the flue gas mixture passing through the mixing section 130 can be controlled.
  • the temperature of the exhaust gas or the mixed gas supplied to the heat exchanging unit 160 can be controlled by controlling the temperature of the exhaust gas or the mixed gas passing through the mixing unit 130, that is, the amount of recovered heat energy.
  • the control unit 190 is connected to the second temperature sensor 168 and the second and third on-off valves 112 and 156 and controls the second and third on-off valves 112 and 156 according to a signal from the second temperature sensor 168 .
  • the second and third on-off valves 112 and 156 are controlled according to the temperature of the heat transfer fluid sensed by the second temperature sensor 168 to control the inflow amount of the flue gas or the mixed gas flowing through the bypass pipe 150 have.
  • control unit 190 may be connected to the pressure sensor 111, the temperature sensor 113, and the suction fan 170. Accordingly, the inflow amount of the flue gas flowing into the main pipe 110 and the pressure of the shearing equipment can be controlled by controlling the suction fan 170 according to the pressure sensed by the pressure sensor 111.
  • control unit 190 is connected to the plurality of sensors and the plurality of valves, so that the control unit 190 can perform overall and complex control of the exhaust gas heat recovery apparatus 100.
  • the outside air is introduced through the outside air supply pipe 120 and mixed with the flue gas in the mixing part 130 disposed on the main pipe 110 side . Accordingly, since the mixed gas of the exhaust gas and the outside air mixed in the mixing section 130 is provided to the heat exchanging section 160, even if the temperature of the exhaust gas rises sharply, heat damage to the heat exchanger 162 can be prevented .
  • the temperature of the mixed gas supplied to the heat exchanging unit 160 can be adjusted within the set temperature range, thermal damage to the heat exchanger 162 by the exhaust gas can be prevented.
  • the flow rate and the temperature of the exhaust gas flowing to the bypass pipe 150 through the second and third opening / closing valves 112 and 156 can be adjusted to further reduce heat damage to the heat exchanger 162, You can.
  • FIG. 2 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to a second embodiment of the present invention.
  • an exhaust gas heat recovery apparatus 200 includes a main pipe 110, an outside air supply pipe 120, a mixing unit 130, a first temperature sensor 140, A bypass pipe 150, a heat exchanger 260, a suction fan 170, a dust collector 180, and a controller 190.
  • the main pipe 110, the outside air supply pipe 120, the mixing unit 130, the first temperature sensor 140, the bypass pipe 150, the suction fan 170, and the dust collecting unit 180 are constructed as described above. And therefore, a detailed description thereof will be omitted here and the above description will be omitted.
  • the heat exchange unit 260 includes a heat exchanger 262 connected to the bypass pipe 150, a heat transfer fluid pipe 264 connected to the heat exchanger, a pump 266 installed in the heat transfer fluid pipe 264, And a second temperature sensor 268 installed in the heat transfer fluid pipe 264 so as to be disposed at the rear end of the heat exchanger 262.
  • the heat exchanger 260 may be provided with a heat exchanger 269 for heat transfer with the heat transfer fluid.
  • the heat pipe heat exchanger 269 may be connected to a fluid pipe 269a for the thermo tube through which the thermo tube fluid flows.
  • FIG. 3 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to a third embodiment of the present invention.
  • the exhaust gas heat recovery apparatus 300 includes a main pipe 110, an outside air supply pipe 120, a mixing unit 130, a first temperature sensor 140, A bypass pipe 150, a heat exchanger 360, a suction fan 170, a dust collector 180, and a controller 190.
  • the main pipe 110, the outside air supply pipe 120, the mixing unit 130, the first temperature sensor 140, the bypass pipe 150, the suction fan 170, and the dust collecting unit 180 are constructed as described above. And therefore, a detailed description thereof will be omitted here and the above description will be omitted.
  • the heat exchanging unit 360 includes a heat exchanger 362 arranged to pass the bypass pipe 150 therethrough and a heat transfer fluid pipe 364 passing through the heat exchanger 362 and exchanging heat with the bypass pipe 150, And a third temperature sensor 366 installed in the heat exchanger 362 for measuring the temperature of the heat exchanger 362.
  • the internal temperature of the heat exchanger 362 is measured through the third temperature sensor 366, and the inflow amount of the exhaust gas flowing through the bypass pipe 150 connected to the heat exchanger 360 can be controlled.
  • the heat damage of the heat exchanger 362 can be further reduced, and the heat recovery efficiency can be further increased.
  • FIG. 4 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to a fourth embodiment of the present invention.
  • the exhaust gas heat recovery apparatus 400 includes a main pipe 110, an outside air supply pipe 120, a mixing unit 130, a first temperature sensor 140, A bypass pipe 150, a heat exchanger 460, a suction fan 170, a dust collector 180, and a controller 190.
  • the main pipe 110, the outside air supply pipe 120, the mixing unit 130, the first temperature sensor 140, the bypass pipe 150, the suction fan 170, and the dust collecting unit 180 are constructed as described above. And therefore, a detailed description thereof will be omitted here and the above description will be omitted.
  • the heat exchanging unit 460 includes a heat exchanger 462 to which the bypass pipe 150 is connected, a transfer member 464 disposed to pass through the heat exchanger 462, and a heat exchanger And a third temperature sensor 466 for measuring the temperature of the second temperature sensor 462.
  • the heat exchanger 462 may be formed to have an internal space, and may be formed of a solid (e.g., coal) and a bypass pipe (not shown) that are transferred through the transfer member 464 in the internal space of the heat exchanger 462 150 may be in direct contact with the exhaust gas.
  • a solid e.g., coal
  • a bypass pipe not shown
  • the conveying member 464 may be provided with a speed adjusting device 464a for adjusting the conveyance amount of the solid to be conveyed. That is, the speed regulating device 464a may be installed on the conveying member 464 to regulate the amount of the solid conveyed through the conveying member 464 in accordance with the inflow amount of the exhaust gas supplied to the bypass pipe 150.
  • the third temperature sensor 466 is installed in the heat exchanger 462, the internal temperature of the heat exchanger 462 is measured through the third temperature sensor 466 and the bypass pipe 462, which is connected to the heat exchanger 460, The inflow amount of the flue gas introduced into the flue 150 can be controlled.
  • the heat damage of the heat exchanger 462 can be further reduced, and the heat recovery efficiency can be further increased.
  • FIG. 5 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to a fifth embodiment of the present invention.
  • the exhaust gas heat recovery apparatus 500 includes a main pipe 510, an outside air supply pipe 520, a mixing unit 530, a first temperature sensor 540, A bypass pipe 550, a heat exchanging unit 560, a suction fan 570, a dust collecting unit 580, and a control unit 590.
  • the exhaust gas flows through the inside.
  • the main pipe 510 may be connected to a thermal facility such as a boiler including a power plant and an industrial furnace such as a combustion furnace, an electric furnace, and the like.
  • a pressure sensor 511 may be installed in the main pipe 510 so that the main gas pipe 510 is disposed at the inlet of the flue gas inlet, that is, at the front end of the portion where the outside air supply pipe 520 is connected.
  • the pressure sensor 511 is connected to the control unit 590 and transmits to the controller 590 a signal indicative of the inflow pressure of the flue gas flowing into the main pipe 510.
  • control unit 590 controls the suction fan 570 to control the pressure of the shearing facility, and can control the inflow amount of the flue gas.
  • the inlet pipe temperature sensor 513 may be installed in the main pipe 510 so as to be disposed adjacent to the exhaust gas inlet side of the main pipe 510, that is, adjacent to the pressure sensor 511.
  • the temperature sensor 513 for the inlet portion detects the temperature of the incoming flue gas when the temperature of the flue gas is suddenly raised or lowered and finally detects the temperature of the outside portion of the outside air flowing from the outside air supply pipe 520 to maintain the temperature of the mixing portion 530 at a predetermined temperature
  • the outside air supply pipe 520 is connected to the main pipe 510 and supplies the outside air to the main pipe 510.
  • the outside air supply pipe 520 is provided with a first opening / closing valve 522.
  • the first on-off valve 522 is also connected to the control unit 590 so that the first on-off valve 522 can be opened or closed according to a signal from the first temperature sensor 540.
  • the mixing portion 530 is installed in the main pipe 510 so as to be disposed at the rear end of the portion to which the outside air supply pipe 520 is connected. That is, in the mixing unit 530, the mixed gas of the exhaust gas supplied from the main pipe 510 and the outside air supplied from the outside air supply pipe 520 is mixed with a mixed gas having a chamber shape, a mixer shape, have. Since the mixing unit 530 is disposed in the main pipe 510, even if the inflow amount of the exhaust gas rapidly increases or the temperature of the exhaust gas rises sharply, the exhaust gas and the outside air are mixed in advance in the mixing unit 130, The thermal shock caused by the heat applied to the heat sink can be mitigated.
  • the first temperature sensor 540 is installed in the main pipe 510 so as to be disposed at the rear end of the mixing portion 530.
  • the first temperature sensor 540 passes through the mixing unit 530 and measures the temperature of the fluid flowing through the main pipe 510. Meanwhile, the first temperature sensor 540 may be connected to the controller 590.
  • the control unit 590 operates the first opening / closing valve 522 of the outside air supply pipe 520 in accordance with a signal from the first temperature sensor 540.
  • the first temperature sensor 540 is provided at the rear end of the mixing unit 530 installed in the main pipe 510 to measure the temperature of the mixed gas of the exhaust gas and the outside air passing through the mixing unit 530, 530 to be controlled.
  • the first temperature sensor 140 is disposed at the rear end of the mixing unit 130 in the present embodiment, the first temperature sensor 140 is not limited to the first temperature sensor 140, It is possible.
  • the bypass pipe 550 is connected to the main pipe 510 so as to be disposed at the rear end of the first temperature sensor 540.
  • the bypass pipe 550 may be connected to the main pipe 510 so that the exhaust gas flows without passing through the heat exchanging part 560.
  • bypass pipe 550 may be provided with a second opening / closing valve 512, which will be described later, and a third opening / closing valve 552 for controlling the inflow amount of the exhaust gas flowing into the heat exchanging unit 560.
  • the exhaust gas flows through the main pipe 510 without flowing along the bypass pipe 550. Then, when the third open / close valve 512 is closed and the third open / close valve 552 is opened, the exhaust gas flows only through the bypass pipe 550 and does not flow through the main pipe 510.
  • the amount of inflow of the exhaust gas flowing through the bypass pipe 550 can be adjusted by adjusting the opening and closing degree of the second and third opening / closing valves 512 and 552.
  • the heat exchange unit 560 includes a heat exchanger 562 connected to the main pipe 510.
  • the heat exchanger 560 also includes a heat transfer fluid conduit 564 connected to the heat exchanger 562 for transferring the heat transfer fluid and a heat transfer fluid conduit 564 for measuring the temperature of the heat transfer fluid passing through the heat exchanger 562.
  • a fourth open / close valve 568 installed in the heat transfer fluid pipe 564.
  • the second open / The second temperature sensor 566 is also connected to the control unit 590.
  • the control unit 590 controls the second and third on-off valves 512 and 522 according to a signal from the second temperature sensor 566, (522). Further, the control unit 590 controls the fourth on-off valve 568 in accordance with the signal from the second temperature sensor 566 to control the inflow amount of the heat transfer fluid.
  • the suction fan 570 may be installed in the main pipe 510 so as to be disposed at the rear end of the bypass pipe 550.
  • the suction fan 570 may control the inflow amount of the exhaust gas. That is, the inflow amount of the flue gas flowing into the main pipe 510 and the pressure of the shearing equipment can be adjusted by the suction fan 570.
  • the dust collecting facility 580 is installed in the main pipe 510 so as to be disposed at the front end of the suction fan 570, and can remove dust and other components from the exhaust gas.
  • the control unit 590 is connected to the first temperature sensor 540 and the first on-off valve 522 and controls the first on-off valve 522 according to a signal from the first temperature sensor 540.
  • the inflow amount of the outside air is controlled by controlling the first opening / closing valve 522 according to the temperature of the exhaust gas detected by the first temperature sensor 540 or the temperature of the mixed gas of the exhaust gas and the outside air. Therefore, the temperature of the flue gas mixture passing through the mixing portion 530 can be controlled.
  • the temperature of the exhaust gas or the mixed gas supplied to the heat exchanging unit 560 can be controlled by controlling the temperature of the exhaust gas or the mixed gas passing through the mixing unit 530.
  • the control unit 590 is connected to the second temperature sensor 566 and the second and third on-off valves 512 and 522 and controls the second and third on-off valves 512 and 552 in accordance with a signal from the second temperature sensor 566 .
  • the second and third on-off valves 512 and 522 can be controlled according to the temperature of the heat transfer fluid sensed by the second temperature sensor 566 to control the inflow amount of the flue gas or the mixed gas flowing through the bypass pipe 550 .
  • control unit 590 may be connected to the pressure sensor 511 and the suction fan 570. Accordingly, the inflow amount of the flue gas flowing into the main pipe 510 and the pressure of the shearing facility can be controlled by controlling the suction fan 570 according to the pressure sensed by the pressure sensor 511.
  • control unit 590 is connected to the plurality of sensors and the plurality of valves, so that the control unit 590 can perform overall and complex control of the exhaust gas heat recovery apparatus 100.
  • the outside air is introduced through the outside air supply pipe 520 and mixed with the flue gas in the mixing part 530 disposed on the main pipe 510 side . Accordingly, since the mixed gas of the exhaust gas and the outside air mixed in the mixing section 530 is provided to the heat exchanging section 560, even if the temperature of the exhaust gas rises sharply, heat damage to the heat exchanger 562 can be prevented .
  • the temperature of the mixed gas supplied to the heat exchanging part 560 can be adjusted within the set temperature range, heat damage to the heat exchanger 562 by the exhaust gas can be prevented.
  • the inflow amount of the flue gas flowing into the bypass pipe 550 through the second and third opening / closing valves 512 and 552 can be controlled to further reduce thermal damage of the heat exchanger 562, will be.
  • FIG. 6 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to a sixth embodiment of the present invention.
  • the exhaust gas heat recovery apparatus 600 includes a main pipe 510, an outside air supply pipe 520, a mixing unit 530, a first temperature sensor 540, A bypass pipe 550, a heat exchanger 660, a suction fan 570, a dust collector 580, and a controller 590.
  • the main pipe 510, the outside air supply pipe 520, the mixing unit 530, the first temperature sensor 540, the bypass pipe 550, the suction fan 570, and the dust collecting unit 580 are constructed as described above And therefore, a detailed description thereof will be omitted here and the above description will be omitted.
  • the heat exchanging portion 660 includes a heat exchanger 662 connected to the main pipe 510, a conveying member 664 arranged to penetrate the heat exchanger 662, and a conveying member 664 disposed on the conveying member 664, And a third temperature sensor 666 for measuring the temperature.
  • the heat exchanger 662 may be formed to have an internal space and may be connected to a solid (e.g., coal) and a bypass piping (not shown) that is transferred through the transfer member 664 in the interior space of the heat exchanger 662 550 can directly contact the exhaust gas.
  • a solid e.g., coal
  • bypass piping not shown
  • the conveying member 664 may be provided with a speed adjusting device 664a for adjusting the conveyance amount of the solid to be conveyed. That is, the speed regulating device 664a may be installed on the conveying member 664 to regulate the amount of the solid conveyed through the conveying member 664 in accordance with the inflow amount of the exhaust gas supplied to the main pipe 510.
  • the third temperature sensor 666 is installed on the transfer member 664, the temperature of the solid transferred through the third temperature sensor 666 is measured and the bypass pipe 550 connected to the heat exchanging unit 660 The flow rate of the flowing flue gas can be controlled.
  • the heat damage of the heat exchanger 662 can be further reduced, and the heat recovery efficiency can be further increased.
  • FIG. 7 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to a seventh embodiment of the present invention.
  • the exhaust gas heat recovery apparatus 700 includes a main pipe 110, an outside air supply pipe 120, a mixing unit 130, a first temperature sensor 140, A heat exchange unit 760, a suction fan 170, a dust collecting facility 180, and a control unit 190.
  • the heat exchanger 760 includes a heat exchanger 762 connected to the main pipe 110.
  • Heat exchange portion 760 is also connected to heat exchanger 762 and includes a heat transfer fluid conduit 764 through which heat transfer fluid flows and a heat transfer fluid conduit 764 for measuring the temperature of the heat transfer fluid passing through heat exchanger 762 And a fourth open / close valve 768 installed in the heat transfer fluid pipe 764.
  • the second open / The second temperature sensor 766 is also connected to the controller 190.
  • the controller 190 can control the first open / close valve 122 according to a signal from the second temperature sensor 766. Further, the controller 190 controls the fourth open / close valve 968 in accordance with the signal from the second temperature sensor 766 to control the inflow amount of the heat transfer fluid.
  • FIG. 8 is a schematic configuration diagram showing an exhaust gas heat recovery apparatus according to an eighth embodiment of the present invention.
  • an exhaust gas heat recovery apparatus 800 includes a main pipe 110, an outside air supply pipe 120, a mixing unit 130, a first temperature sensor 140, A heat exchanging unit 860, a suction fan 170, a dust collecting facility 180, and a control unit 190.
  • the heat exchanging portion 860 includes a heat exchanger 862 connected to the main pipe 110, a transfer member 864 arranged to penetrate the heat exchanger 862, and a transfer member 864 disposed on the transfer member 864, And a third temperature sensor 866 for measuring the temperature.
  • the heat exchanger 862 may be formed to have an internal space and may be connected to a solid (such as coal) and a main pipe 110, which are conveyed through a transfer member 864 in the interior space of the heat exchanger 862, Can be directly contacted with the exhaust gas.
  • a solid such as coal
  • main pipe 110 which are conveyed through a transfer member 864 in the interior space of the heat exchanger 862, Can be directly contacted with the exhaust gas.
  • the conveying member 864 may be provided with a speed adjusting device 464a for adjusting the conveyance amount of the solid to be conveyed. That is, the speed regulating device 864a may be installed on the conveying member 464 to regulate the amount of the solid conveyed through the conveying member 864 in accordance with the inflow amount of the exhaust gas supplied to the main pipe 110.
  • the third temperature sensor 866 is installed on the transfer member 864, the temperature of the solid transferred through the third temperature sensor 866 is measured, and the main pipe 110 connected to the heat exchanging unit 860 It is possible to control the flow rate of the mixed gas of the exhaust gas and the outside air.
  • the heat damage of the heat exchanger 862 can be further reduced, and the heat recovery efficiency can be further increased.
  • FIG. 9 is a schematic configuration diagram of an exhaust gas heat recovery apparatus according to a ninth embodiment of the present invention
  • FIGS. 10 to 13 are views showing operation of an exhaust gas heat recovery apparatus according to a ninth embodiment of the present invention.
  • One embodiment of the exhaust gas exhaust gas heat recovery apparatus 900 according to the present invention may include an exhaust unit 1000, a waste heat recovery unit 1100, an outside air inflow unit 1200, and a control unit 1300.
  • the exhaust unit 1000 may include an exhaust duct 1010.
  • the exhaust duct 1010 may be connected to a heat facility (not shown) for exhausting the exhaust gas.
  • the exhaust gas discharged from the heat equipment can flow into the exhaust duct 1010 and flow.
  • the heat facility to which the exhaust duct 1010 is connected may be, for example, an industrial plant such as a combustion furnace or an electric furnace, or a boiler included in a power plant.
  • the heat equipment is not particularly limited, and any known means is possible as long as exhaust gas is discharged and the exhaust duct 1010 is connected to allow the exhaust gas to flow into the exhaust duct 1010 to flow.
  • the exhaust unit 1000 may further include an exhaust duct opening / closing damper 1020.
  • the exhaust duct opening / closing damper 1020 is provided in the exhaust duct 1010 to open and close the exhaust duct 1010.
  • the exhaust duct opening / closing damper 1020 is rotatably installed in the exhaust duct 1010 to open and close the exhaust duct 1010.
  • the configuration in which the exhaust duct opening / closing damper 1020 opens and closes the exhaust duct 1010 is not particularly limited, and any known configuration can be employed as long as the exhaust duct 1010 can be opened and closed.
  • the exhaust duct opening / closing damper 1020 may be electrically connected to the controller 1300. Then, the control unit 1300 can actuate, for example, rotate the exhaust duct opening / closing damper 1020 so that the exhaust duct 1010 is opened and closed.
  • the exhaust duct opening and closing damper 1020 is included in the waste heat recovering unit 1100 as shown in FIG. 9 and includes a portion to which a first bypass duct 1120 to be connected, which is connected to the exhaust duct 1010, And may be provided at a portion of the exhaust duct 1010 between the portions to which the pass duct 1130 is connected.
  • the exhaust unit 1000 may further include a fan 1030.
  • the fan 1030 may be provided in the exhaust duct 1010 so that the exhaust gas discharged from the thermal equipment flows into the exhaust duct 1010 and flows.
  • the fan 1030 may be provided at a portion of the exhaust duct 1010 after the portion where the second bypass duct 1130 of the waste heat recovery unit 1100 is connected in the flow direction of the exhaust gas as shown in FIG. .
  • the fan 1030 may be a suction fan.
  • the fan 1030 may be provided at a portion of the exhaust duct 1010 before the portion where the first bypass duct 1120 of the waste heat recovering unit 1100 is connected to the blowing fan in the flow direction of the exhaust gas.
  • the fan 1030 may be electrically connected to the controller 1300.
  • the exhaust gas discharged from the thermal equipment can be introduced into the exhaust duct 1010 as shown in FIGS. 10 to 13, when the exhaust duct opening / closing damper 1020 is opened by the control unit 1300, the exhaust gas flowing into the exhaust duct 1010 flows through the exhaust duct 1010, . 11 and 12, when the exhaust duct opening / closing damper 1020 is closed by the control unit 1300, the exhaust gas flowing into the exhaust duct 1010 bypasses a part of the exhaust duct 1010, After passing through the heat exchanger 1110 included in the recovery unit 1100 and connected to the first bypass duct 1120 and the second bypass duct 1130 and then returned to the exhaust duct 1010, have.
  • control unit 1300 may control the fan 230 to adjust the internal pressure of the heat equipment to which the exhaust duct 1010 is connected.
  • a first temperature sensor ST1 is connected to a portion of the exhaust duct 1010 before the first bypass duct 1120 of the waste heat recovery unit 1100 is connected in the flow direction of the exhaust gas .
  • the first temperature sensor ST1 may be electrically connected to the controller 1300.
  • the temperature of the exhaust gas flowing into the exhaust duct 1010 sensed by the first temperature sensor ST1 may be sent to the controller 1300 in the form of an electric signal, for example.
  • the pressure sensing sensor SP may be provided at a portion of the exhaust duct 1010 before the first bypass duct 1120 of the waste heat recovery unit 1100 is connected in the flow direction of the exhaust gas.
  • the pressure of the exhaust gas flowing into the exhaust duct 1010 can be sensed by the pressure sensor SP. Then, the internal pressure of the heat equipment to which the exhaust duct 1010 is connected can be known.
  • the pressure sensing sensor SP may be electrically connected to the control unit 1300.
  • the pressure of the exhaust gas flowing into the exhaust duct 1010 sensed by the pressure sensor SP may be sent to the controller 1300 in the form of an electric signal, for example.
  • the waste heat recovery unit 1100 may include a heat exchanger 1110.
  • the heat exchanger 1110 can recover the waste heat from the exhaust gas.
  • the heat exchanger 1110 can recover the waste heat of the exhaust gas by heat exchange between the exhaust gas and the heat exchange medium.
  • the heat exchange medium may be air, water, oil, or the like.
  • the heat exchange medium is not particularly limited, and any well-known means may be used as long as heat exchange with the exhaust gas is possible so as to recover waste heat of the exhaust gas.
  • the structure of the heat exchanger 1110 is not particularly limited, and any known structure may be used as long as it is capable of recovering waste heat from the exhaust gas.
  • the heat exchanger 1110 is connected to the exhaust duct 1010 so that the exhaust gas flowing into the exhaust duct 1010 of the exhaust unit 1000 bypasses a part of the exhaust duct 1010 and is returned to the exhaust duct 1010 Can be connected.
  • the waste heat recovery unit 1100 may further include a first bypass duct 1120 and a second bypass duct 1130.
  • the first bypass duct 1120 is connected to the exhaust duct 1110 so that the exhaust gas flows from the exhaust duct 1010 of the exhaust unit 1000 to the heat exchanger 1110 as shown in FIGS. 1010 and the heat exchanger 1110.
  • the second bypass duct 1130 may be connected to the heat exchanger 1110 and the exhaust duct 1010 such that the exhaust gas having passed through the heat exchanger 1110 is returned to the exhaust duct 1010.
  • the first bypass duct 1120 and the second bypass duct 1130 may be connected to each other.
  • the first bypass duct 1120 and the second bypass duct 1130 may be integrally connected to each other.
  • the first bypass duct 1120 and the second bypass duct 1130 may be separately connected to each other by welding or the like.
  • the waste heat recovery unit 1100 may further include a first duct opening / closing damper 1140 and a second duct opening / closing damper 1150.
  • the first duct opening / closing damper 1140 is provided in the first bypass duct 1120 to open / close the first bypass duct 1120.
  • the first duct opening / closing damper 1140 is rotatably installed in the first bypass duct 1120 to open / close the first bypass duct 1120.
  • the construction in which the first duct opening / closing damper 1140 opens and closes the first bypass duct 1120 is not particularly limited, and any known structure may be employed as long as the first bypass duct 1120 can be opened and closed Do.
  • the second duct opening / closing damper 1150 is provided in the second bypass duct 1130 to open / close the second bypass duct 1130.
  • the second duct opening / closing damper 1150 is rotatably installed in the second bypass duct 1130 to open and close the second bypass duct 1130.
  • the second duct opening / closing damper 1150 is not particularly limited as long as it can open and close the second bypass duct 1130, Do.
  • the first duct opening / closing damper 1140 and the second duct opening / closing damper 1150 may be electrically connected to the control unit 1300, respectively.
  • the controller 1300 operates the first duct opening / closing damper 1140 or the second duct opening / closing damper 1150 to open or close the first bypass duct 1120 or the second bypass duct 1130 .
  • the second temperature sensing sensor ST2 may be provided at a portion of the first bypass duct 1120 between the first duct opening / closing damper 1140 and the heat exchanger 1110 as shown in FIG.
  • the temperature of the exhaust gas flowing into the heat exchanger 1110 through the first bypass duct 1120 can be sensed by the second temperature sensor ST2.
  • the second temperature sensor ST2 may be electrically connected to the controller 1300. [
  • the temperature of the exhaust gas flowing into the heat exchanger 1110 sensed by the second temperature sensor ST2 may be sent to the controller 1300 in the form of an electric signal, for example.
  • the waste heat recovery unit 1100 may further include a heat exchange medium inlet duct 1160 and a heat exchange medium outlet duct 1170.
  • the heat exchange medium inlet duct 1160 may be connected to the heat exchanger 1110 so that the heat exchange medium may flow to and pass through the heat exchanger 1110.
  • the heat exchange medium discharge duct 1170 can be connected to the heat exchanger 1110 such that the heat exchange medium having passed through the heat exchanger 1110 and recovering the waste heat by heat exchange with the exhaust gas passes through the heat exchanger 1110 and is supplied to the waste heat source .
  • the heat exchange medium inlet duct 1160 and the heat exchange medium outlet duct 1170 can be connected to each other.
  • the heat exchange medium inlet duct 1160 and the heat exchange medium outlet duct 1170 may be integrally connected to each other.
  • the heat exchange medium inlet duct 1160 and the heat exchange medium outlet duct 1170 may be separately connected to each other by welding or the like.
  • the heat exchange medium inlet duct 1160 may be connected to a heat exchange medium source (not shown) in which the heat exchange medium is stored.
  • a pump (not shown) may be provided in the heat exchange medium inlet duct 1160 or the heat exchange medium source. The pump and the like may be electrically connected to the control unit 1300.
  • the heat exchange medium of the heat exchange medium source flows through the heat exchange medium inlet duct 1160 and the heat exchange medium discharge duct 1170 to the heat exchanger 310 ≪ / RTI >
  • the first duct opening / closing damper 1140 and the second duct opening / closing damper 1150 are opened by the control unit 1300 and the exhaust duct damper 1020 of the exhaust unit 1000 is closed
  • the exhaust gas flowing into the exhaust duct 1010 can flow to the heat exchanger 1110 by bypassing a part of the exhaust duct 1010 through the first bypass duct 1120.
  • the exhaust gas flowing to the heat exchanger 1110 and passing through the heat exchanger 1110 may be exchanged with the heat exchange medium and then returned to the exhaust duct 1010 through the second bypass duct 1130 to be discharged to the outside.
  • the heat exchange medium discharge duct 1170 may be connected to the waste heat application site.
  • the use of the waste heat can be, for example, an organic Rankine cycle or a carina cycle. However, the place where the waste heat is used is not particularly limited, and any waste heat can be used.
  • the outside air inflow unit 1200 may be connected to the waste heat recovery unit 1100 so that outside air flows into the waste heat recovery unit 1100.
  • the outside air inflow unit 1200 may include an outside air inflow duct 1210 and an outside air duct opening and closing damper 1220.
  • the outside air inlet duct 1210 may be connected to the outside and the first bypass duct 1120 of the waste heat recovery unit 1100.
  • the outside air inflow duct 1210 may be connected to a portion of the first bypass duct 1120 before the first duct opening / closing damper 1140 of the waste heat recovery unit 1100 in the flow direction of the exhaust gas.
  • the outside air duct opening / closing damper 1220 is provided in the outside air inflow duct 1210 to open / close the outside air inflow duct 1210.
  • the outside air duct opening / closing damper 1220 is rotatably installed in the outside air inlet duct 1210 to open and close the outside air inlet duct 1210.
  • the configuration in which the outside-air duct opening / closing damper 1220 opens and closes the outside-air inflow duct 1210 is not particularly limited, and any known structure may be used as long as it can open and close the outside-air inflowing duct 1210.
  • the outdoor duct opening / closing damper 1220 may be electrically connected to the controller 1300.
  • the control unit 1300 can operate, for example, rotate the outside-air duct opening / closing damper 1220 to open and close the outside-air inlet duct 1210.
  • the control unit 1300 can open the outside air duct opening / closing damper 1220.
  • the outdoor air having a lower temperature than the exhaust gas flowing into the exhaust duct 1010 of the exhaust unit 1000 flows into the first bypass duct 1120 of the waste heat recovery unit 1100 through the outside air inflow duct 1210 .
  • the temperature of the exhaust gas flowing into the heat exchanger 1110 through the first bypass duct 1120 of the waste heat recovery unit 1100 can be maintained within a predetermined temperature range.
  • the control unit 1300 can open the outside air duct opening / closing damper 1220 when the temperature of the exhaust gas flowing into the exhaust duct 1010 of the outdoor unit exceeds the predetermined allowable temperature.
  • the outdoor air having a temperature lower than that of the exhaust gas flowing into the exhaust duct 1010 of the exhaust unit 1000 is exhausted through the first bypass duct 1120 of the outdoor air inlet duct 1210 and the waste heat recovering unit 1100, And may be introduced into the duct 1010.
  • the exhaust gas flowing through the exhaust duct 1010 of the exhaust unit 1000 can be prevented from exceeding the predetermined allowable temperature.
  • the control unit 1300 can control the exhaust unit 1000, the waste heat recovery unit 1100, and the outside air inflow unit 1200.
  • the control unit 1300 controls the exhaust duct opening / closing damper 1020, the fan 1030, the first temperature detecting sensor ST1, the pressure detecting sensor SP, and the waste heat recovering unit 1100 of the exhaust unit 1000, The first duct opening / closing damper 1140, the second duct opening and closing damper 1150, the second temperature detecting sensor ST2 and the outside air duct opening and closing damper 1220 of the outside air inlet unit 1200,
  • the unit 1000, the waste heat recovery unit 1100, and the outdoor unit unit 1200 can be controlled.
  • the control unit 1300 drives the fan 1030 of the exhaust unit 1000 and opens the exhaust duct opening and closing damper 1020 as shown in FIG. 10 and connects the first duct opening and closing damper 1140 of the waste heat recovering unit 1100
  • the second duct opening / closing damper 1150 and the outside air duct opening / closing damper 1220 of the outside air inlet unit 1200 can be closed.
  • the exhaust gas flowing into the exhaust duct 1010 of the exhaust unit 1000 from the thermal equipment can be discharged to the outside after flowing through the exhaust duct 1010.
  • the controller 1300 controls the heat exchange medium inlet duct 1160 connected to the heat exchange medium inlet duct 1160 of the waste heat recovery unit 1100 or the heat exchange medium inlet duct
  • the heat exchange medium of the heat exchange medium source is passed through the heat exchange medium inlet duct 1160 of the waste heat recovery unit 1100 and the heat exchange medium discharge duct 1170 through the heat exchanger 1110 can do.
  • control unit 1300 opens the first duct opening / closing damper 1140 and the second duct opening / closing damper 1150 of the waste heat recovery unit 1100 and closes the exhaust duct opening / closing damper 1020 of the exhaust unit 1000 .
  • the exhaust gas flowing into the exhaust duct 1010 of the exhaust unit 1000 from the thermal equipment bypasses a part of the exhaust duct 1010 and flows through the first bypass duct 1120 and the second bypass duct 1130, Exchanges heat with the heat exchange medium through the heat exchanger 1110, returns to the exhaust duct 1010, and is discharged to the outside.
  • the heat exchange medium can collect the waste heat of the exhaust gas by heat exchange between the exhaust gas in the heat exchanger 1110 and the heat exchange medium.
  • the waste heat recovered by the heat exchange medium may be used by being transferred to the heat exchange medium discharge duct 1170 through a heat exchange medium.
  • the controller 1300 can completely close the exhaust duct opening / closing damper 1020 after a predetermined time since the first duct opening / closing damper 1140 and the second duct opening / closing damper 1150 are fully opened. This allows the internal pressure of the thermal equipment, which can be sensed by the pressure sensor SP, to maintain a predetermined pressure range.
  • the control unit 1300 bypasses a part of the exhaust duct 1010 of the exhaust unit 1000 So that the temperature of the exhaust gas flowing into the heat exchanger 1110 can be maintained within a predetermined temperature range with the outside air introduced through the outside air inflow unit 1200.
  • the exhaust gas flowing into the heat exchanger 1110 of the waste heat recovery unit 1100 can be kept within a predetermined temperature range.
  • the heat exchange medium in which the waste heat of the exhaust gas is recovered by the heat exchange with the exhaust gas in the heat exchanger 1110 of the waste heat recovery unit 1100 is supplied to the waste heat utilization source and preheated by the waste heat supplied by the heat exchange medium.
  • the fluctuation of the preheating temperature of air and the production amount of steam can be small, so that the usability of waste heat can be increased.
  • the control unit 1300 controls the outdoor unit
  • the air duct opening / closing damper 1220 of the outdoor unit 1200 can be opened.
  • the outside air having a lower temperature than the exhaust gas flowing into the exhaust duct 1010 flows through the outside air inflow duct 1210 of the outside air inflow unit 1200 to the first bypass duct 1120 of the waste heat recovering unit 1100 And the temperature of the exhaust gas may be lowered.
  • the controller 1300 controls the temperature of the outside air inflow unit 1200 so that the temperature of the exhaust gas flowing into the heat exchanger 1110 of the waste heat recovery unit 1100 sensed by the second temperature sensor ST2 is within a predetermined temperature range.
  • the opening degree of the outside air duct opening / closing damper 1220 of the outside air duct can be adjusted.
  • the temperature of the exhaust gas flowing into the heat exchanger 1110 through the first bypass duct 1120 of the waste heat recovery unit 1100 can be maintained within a predetermined temperature range.
  • 1300 can prevent the temperature of the exhaust gas flowing through the exhaust duct 1010 of the exhaust unit 1000 from exceeding a predetermined allowable temperature by the outside air flowing through the outside air inflow unit 1200.
  • the outside air duct opening / closing damper 1220 of the outside air inflow unit 1200 can be opened.
  • the outside air having a temperature lower than the temperature of the exhaust gas flowing into the exhaust duct 1010 of the exhaust unit 1000 flows into the outside air inflow duct 1210 of the outside air inflow unit 1200 and the first bypass of the waste heat recovering unit 1100
  • the exhaust gas can flow into the exhaust duct 1010 of the exhaust unit 1000 through the duct 1120 and the temperature of the exhaust gas can be lowered. Therefore, the exhaust gas flowing through the exhaust duct 1010 of the exhaust unit 1000 can be prevented from exceeding the predetermined allowable temperature.
  • the heat exchange medium can be stopped from passing through the heat exchange medium inlet duct 1160 of the waste heat recovery unit 1100 and the heat exchanger 1110 of the waste heat recovery unit 1100 through the heat exchange medium discharge duct 1170 have.
  • the control unit 1300 controls the flow of the heat exchange medium By stopping the pump or the like, the heat exchange medium can be stopped from passing through the heat exchanger 1110.
  • control unit 1300 opens the exhaust duct opening / closing damper 1020 of the exhaust unit 1000 and closes the first duct opening / closing damper 1140 and the second duct opening / closing damper 1150 of the waste heat recovering unit 1100,
  • the exhaust gas flowing into the exhaust duct 1010 of the unit 1000 flows through the exhaust duct 1010 and is discharged to the outside.
  • the heat exchange medium is heat-exchanged with the heat exchange medium inlet duct 1160 of the waste heat recovery unit 1100 So that passage through the heat exchanger 1110 through the media discharge duct 1170 can be stopped.
  • the controller 1300 completely closes the first duct opening / closing damper 1140 and the second duct opening / closing damper 1150 of the waste heat recovering unit 1100, and after a predetermined time passes, the exhaust duct opening / (1020) to be fully open. Accordingly, the internal pressure of the thermal equipment, which can be sensed by the pressure sensor SP, can be prevented from suddenly dropping.
  • the temperature of the exhaust gas flowing into the heat exchanger included in the exhaust gas waste heat recovery apparatus for recovering waste heat of the exhaust gas is controlled by the outside air to a predetermined temperature range
  • the utilization efficiency of the waste heat recovered by the exhaust gas waste heat recovery apparatus can be increased.

Abstract

L'invention concerne un appareil de récupération de la chaleur sensible d'un gaz d'échappement, l'appareil comprenant : un tuyau principal apte à être traversé par un écoulement de gaz d'échappement ; un tuyau d'alimentation en air extérieur raccordé au tuyau principal et comportant une première vanne d'ouverture/de fermeture ; une unité de mélange prévue au niveau du tuyau principal de façon à être disposée au niveau de l'extrémité arrière d'une partie de raccordement du tuyau d'alimentation en air extérieur sur un circuit d'écoulement de gaz d'échappement ; un premier capteur de la température disposé à l'intérieur de l'unité de mélange ou au niveau de l'extrémité arrière de l'unité de mélange ; une unité d'échange de chaleur comportant un échangeur de chaleur et disposée au niveau de l'extrémité arrière de l'unité de mélange sur le circuit d'écoulement de gaz d'échappement de façon à effectuer un échange de chaleur avec le gaz d'échappement ou avec un gaz mixte constitué du gaz d'échappement et de l'air extérieur ; et un ventilateur d'aspiration prévu au niveau du tuyau principal de façon à être disposé au niveau de l'extrémité arrière de l'échangeur de chaleur.
PCT/KR2018/013735 2017-12-14 2018-11-12 Appareil de récupération de chaleur sensible de gaz d'échappement WO2019117477A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020170171823A KR102043025B1 (ko) 2017-12-14 2017-12-14 배기가스 폐열회수장치
KR10-2017-0171823 2017-12-14
KR1020170178467A KR102285076B1 (ko) 2017-12-22 2017-12-22 배가스 현열 회수 장치
KR10-2017-0178467 2017-12-22

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0828832A (ja) * 1994-07-13 1996-02-02 Miyamoto Kogyosho:Kk 火葬炉の排気装置
JPH11148625A (ja) * 1997-11-20 1999-06-02 Hitachi Ltd 廃棄物燃焼熱回収装置および方法
JP2000111001A (ja) * 1998-09-30 2000-04-18 Miura Co Ltd 排熱回収システム
JP3587744B2 (ja) * 1999-08-26 2004-11-10 株式会社 日立インダストリイズ 排ガスの廃熱回収方法及び廃熱回収装置
JP2016205679A (ja) * 2015-04-20 2016-12-08 三菱日立パワーシステムズ株式会社 廃熱回収システム及びその運転方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0828832A (ja) * 1994-07-13 1996-02-02 Miyamoto Kogyosho:Kk 火葬炉の排気装置
JPH11148625A (ja) * 1997-11-20 1999-06-02 Hitachi Ltd 廃棄物燃焼熱回収装置および方法
JP2000111001A (ja) * 1998-09-30 2000-04-18 Miura Co Ltd 排熱回収システム
JP3587744B2 (ja) * 1999-08-26 2004-11-10 株式会社 日立インダストリイズ 排ガスの廃熱回収方法及び廃熱回収装置
JP2016205679A (ja) * 2015-04-20 2016-12-08 三菱日立パワーシステムズ株式会社 廃熱回収システム及びその運転方法

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