JP5787087B2 - Heat transfer oil boiler that is heated by exhaust gas from the engine. - Google Patents

Description

  The present invention relates to a heat-medium oil boiler mounted on a ship that directly heats heat-medium oil by the exhaust gas heat of an engine.

  In a ship's heat transfer oil boiler, high-temperature exhaust gas generated from the engine heats the internal heat transfer oil heat coil when passing through the inside of the casing, and then discharges it outside the ship. However, in the conventional heat transfer oil heater, the exhaust gas to the heat transfer oil heater is provided with a switching damper, the supply of the exhaust gas in the casing is stopped, and a bypass exhaust pipe is provided as an exhaust gas bypass.

  In the heat medium oil boiler that directly heats the heat medium oil using the heat of the exhaust gas, a heat medium oil heater, a switching damper, and a bypass exhaust pipe that are configured separately are mainly used.

  Hereinafter, a heat medium oil boiler mounted on a ship that directly heats heat medium oil with exhaust gas heat of an engine will be described with reference to the drawings.

    Referring to FIG. 1, the exhaust gas from the engine 1 is connected to the inlet A of the exhaust gas damper 3 via the exhaust pipe 2, and when the damper 4 is located on the b side, the outlet B is closed and It is connected to the exhaust gas pipe 11 via the bypass exhaust pipe 15 and discharged out of the ship.

  When the damper 4 is operated to the c side, the outlet C is closed, and the exhaust gas passes from the outlet B through the exhaust gas pipe 5 to the exhaust gas inlet D of the heat transfer oil heater 7.

  A large number of heat medium oil heat coils 8 are arranged inside the casing 6 of the heat medium oil heater 7, and the end of the heat medium oil heat coil 8 is connected to the heat medium oil inlet collecting pipe 9 outside the casing 6. And the heat medium oil outlet collecting pipe 10.

  The exhaust gas reaching the exhaust gas introduction port D heats the heat transfer oil heat coil 8 when passing through the casing 6, and is discharged from the exhaust gas outlet E to the outside of the ship through the exhaust gas pipe 11.

  The heat medium oil is supplied to the heat medium oil inlet collecting pipe 9 via the pipe 13 by the heat medium oil circulation pump 12, and when the exhaust gas is supplied to the heat medium oil heater 7, the heat medium oil is heated by the exhaust gas. Then, a circulation circuit is supplied from the heat medium oil outlet collecting pipe 10 to the fuel oil heater 16 through the pipe 14 and extends from the pipe 17 to the heat medium oil circulation pump 12.

  The heat medium oil temperature of the heat medium oil outlet collecting pipe 10 of the heat medium oil heater 7 is monitored, and when the heat medium oil is higher than the specified upper limit temperature, the exhaust gas damper 4 of the engine 1 is moved to the b side. The operation is switched to the bypass exhaust pipe 15 side to cut off the exhaust gas to the heat transfer oil heater 7.

  If the heat transfer oil becomes lower than the specified lower limit temperature, the exhaust gas damper 4 is switched to the c side, the heat medium oil heater 7 is switched to heat the heat transfer oil, and the specified upper limit temperature to the specified lower limit temperature. The interval is controlled within the specified temperature range by ON-OFF control.

  As described above, the exhaust gas from the engine 1 is supplied from the exhaust gas damper 3 to the heat transfer oil heater 7 and discharged outside the ship, and the exhaust gas damper 3 passes through the bypass exhaust pipe 15. It consists of two routes that are discharged out of the ship.

  However, when installing the two exhaust pipe paths and the exhaust gas damper 3 via the heat medium oil heater 7 and the bypass exhaust pipe 15, a large space is required.

Patent Publication 2011-117714 Heating Medium Boiler Patent Publication 2011-099601 Heating Medium Boiler Patent Publication 2010-145041 Heat Transfer System Patent Publication 08-159554 Automatic Number Control Unit for Heating Medium Boiler Patent Publication 07-2225055 Heat medium boiler Patent Publication 07-158970 Circulation Pump Abnormality Determination Device for Heating Medium Boiler Patent Publication No. 07-019599 Combustion control device for heating medium boiler Patent Publication 07-019598 Start-up control device for heating medium boiler Patent Publication H06-341606 Heat Cooling Boiler Automatic Cooling Operation Method Utility Model Kaihei 07-006642 Heat medium temperature control device in heat medium boiler

JIS B 8201 steel boiler

  The problems with the conventional heat transfer oil boilers described above are that the exhaust gas from the engine is switched to two ways by the exhaust gas damper, one is the path through the heat transfer oil heater and the other is the bypass exhaust. It becomes the structure of 2 systems of the route which discharges out of the ship through the pipe, and a large place is required to install the heat medium oil heater, the exhaust gas damper and the bypass exhaust pipe which are the main equipment of the heat medium oil boiler. Some of these main equipments must be installed above the engine and inevitably installed in the engine room casing. However, in small ships, the total tonnage is limited and the engine room casing is narrow and difficult to install. It is.

  The present invention is intended to solve the problems of such a conventional configuration, and aims to simplify the configuration of the heat transfer oil boiler and realize a compact and efficient heat transfer oil boiler. To do.

In order to achieve the above object, the present invention provides a heat transfer oil tank that directly heats heat transfer oil by exhaust gas heat on the outer periphery of the exhaust pipe of the engine, and the heat transfer oil tank has vertical ribs between the upper and lower sides. A feature is that one oil passage that folds back and flows horizontally along the outer periphery of the exhaust pipe is provided so that the heat transfer oil is repeatedly reversed with the vertical rib as a boundary.

The heat medium oil tank, which is the heat medium oil heating section of the heat medium oil boiler, has a structure in which a folded oil passage is formed along the outer periphery of the exhaust pipe inside the heat medium oil tank. By reversing the inside of the heat transfer oil tank repeatedly, the flow inside can be made turbulent, so that the heat transfer oil can be efficiently heated with the exhaust gas heat and arranged compactly on the outer periphery of the exhaust pipe. There is no need to install a heat transfer oil heat coil where exhaust gas passes, unlike a conventional heat transfer oil heater, and the inside of the exhaust pipe that passes the exhaust gas can be made hollow.

In this heat transfer oil boiler, the exhaust pipe having a flange at the lower end is fixed to a shaft arranged on the exhaust pipe center line forming the heat transfer oil tank, and the shaft is interlocked by operating the shaft up and down. The exhaust pipe is structured to move.

  In this case, the exhaust pipe having the flange at the lower end operates the shaft upward, and when the flange moves to the lower part of the exhaust pipe, the air path between the outside of the exhaust cylinder and the exhaust pipe is When the soot is closed and the exhaust pipe passes through the air passage inside the exhaust pipe, and when the shaft is operated downward and the exhaust pipe is moved to the lower end, the soot comes into contact with the seal ring and the exhaust pipe The air path inside the cylinder is closed, and a heating path through which exhaust gas passes through the air path between the outside of the exhaust pipe and the exhaust pipe is provided.

  A heat transfer oil tank that is a heat transfer oil heater of the heat transfer oil boiler is installed outside the exhaust pipe, the inside of the exhaust pipe becomes a cavity, and a shaft disposed on the center line of the exhaust pipe has a flange at the lower end. Compact by adopting a double-pipe structure arrangement in which the exhaust tube is fixed and the shaft is operated up and down to move the exhaust tube, so that the bypass circuit and the heating path are integrated in the heating medium heater. And an efficient heat transfer oil boiler.

It is the schematic of the heat-medium oil boiler which heats a heat-medium oil directly with the waste gas of the conventional engine. 1 is a schematic system diagram of a heat transfer oil boiler that heats heat transfer oil directly with exhaust gas from an engine according to an embodiment of the present invention. It is a longitudinal cross-sectional view of the heat-medium oil heater which concerns on embodiment of this invention. It is the schematic of the internal structure of the heat-medium oil tank which concerns on embodiment of this invention. It is a longitudinal section of an exhaust gas distribution box concerning an embodiment of the present invention. It is a longitudinal cross-section of the drive device which drives the exhaust pipe which concerns on embodiment of this invention. It is a figure which shows the operation state about the exhaust gas heating path which concerns on embodiment of this invention. It is a figure which shows the operation state about the exhaust gas bypass circuit which concerns on embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

An embodiment of the heat transfer oil boiler according to the present invention will be described with reference to FIGS.
In FIG. 2, a schematic system diagram of the heat transfer oil heat boiler will be described. The heat medium boiler is composed of a heat medium heater 4a, a heat medium oil circulation pump 9a, an expansion tank 18a, and a heat medium oil drain tank 19a. The exhaust gas is heated from the engine 1a via the exhaust pipe 2a to heat the heat medium oil. It is connected to the exhaust gas inlet 3a of the vessel 4a, and is discharged out of the ship through the exhaust gas short pipe 6a via the exhaust gas pipe 5a.

  The heat medium oil is supplied to the heat medium oil supply pipe 8a through the heat medium pipe 10a by the heat medium oil circulation pump 9a, passes through the heat medium oil heater 4a, and is heated by the exhaust gas from the heat medium oil take-out pipe 7a. The heated heat medium oil is supplied to the fuel oil heater 12a via the heat medium pipe 11a, and the heat medium oil heat-exchanged with the fuel oil is a circulation circuit from the heat medium pipe 13a to the heat medium oil circulation pump 9a. It has become. The heat transfer oil expanded by being heated by heat reaches the heat transfer oil expansion tank 18a via the heat transfer medium pipe 14a. The air discharged from the expansion tank 18a reaches the heat transfer oil drain tank 19a through the air pipe 15a and is discharged from the air pipe 17a to the atmosphere.

  The heat medium oil heater 4a will be described with reference to FIG. 3. The heat medium oil heater 4a includes a heat medium oil tank 21, an exhaust gas distribution box 22, the exhaust gas short pipe 6a, and a driving device 40. The heat medium oil tank 21 is provided with a heat medium oil retaining ring 25 at the upper outer periphery of the exhaust pipe 24 and a heat medium oil retaining ring 26 at the lower outer periphery, and between the outer periphery of the ring 25 and the outer periphery of the ring 26. It is composed of a peripheral pipe 27 to be connected and is a structure in which the periphery of each member is welded. A connection ring 29 for connecting to the exhaust gas distribution box 22 is arranged on the outer periphery of the lower end portion of the exhaust pipe 24, and a connection ring 28 for connecting to the exhaust gas short pipe 6 a is arranged on the inner periphery of the upper end portion. Secure by welding.

The internal structure of the heat transfer oil tank 21 will be described with reference to FIG. 4. A heat transfer oil retaining vertical rib 31 that vertically partitions the lower surface of the ring 25 and the upper surface of the ring 26 is welded to the exhaust pipe 24. The inside of the heat transfer oil tank 21 is divided into two parts with the vertical rib 31 as a boundary.
The first horizontal rib 32 from the upper part of the heat transfer oil tank 21 is in contact with the vertical rib 31 and is welded in a horizontal state along the outer periphery of the exhaust pipe 24 over about 350 degrees toward the right side. An opening 33 is provided between the vertical rib 31 and the level difference between the horizontal rib 32 and the second horizontal rib 34 is an interval calculated by the flow rate of the heat transfer oil, and the horizontal rib 34 is in contact with the vertical rib 31 on the left side. The exhaust pipe 24 is disposed and welded in a horizontal state along the outer periphery of the exhaust pipe 24 about 350 degrees, and an opening 35 is disposed between the horizontal rib 34 and the vertical rib 31. Similarly to these arrangements, by repeatedly arranging between the ring 25 and the ring 26, one oil passage 36 through which heat transfer oil flows from the upper part to the lower part is formed, and the upper end of the oil path 36 is formed. The heat medium oil supply pipe 8a is provided in the part, and the heat medium oil take-out pipe 7a is provided in the lower end part, and the heat medium oil is repeatedly reversed from the heat medium oil supply pipe 8a to the heat medium oil take-out pipe 7a. And

  The exhaust gas distribution box 22 will be described with reference to FIG. 5. A function corresponding to a switching damper in a conventional heat medium boiler is provided in the heat medium oil heater 4a.

  Exhaust gas inlet 3a provided on the vertical wall surface of the exhaust gas distribution box 22 serves as an exhaust gas inlet of the exhaust gas distribution box 22, and a connection ring 39 provided on the upper surface of the exhaust gas distribution box 22 is connected to the connection ring 29 and the vault. 41 is connected to the heat transfer oil tank 21, and the bottom plate 42 is connected to the lower end ring 44 provided at the lower end of the vertical wall surface of the exhaust gas distribution box 22 by the vault 30, and the seal ring 43 is disposed on the upper surface of the bottom plate 42. Weld.

  A shaft 45 disposed on the center line of the exhaust pipe 24 is supported by a support metal 51 provided on the exhaust gas short pipe 6a and a through metal fitting 50 attached to the bottom plate 42, and the exhaust cylinder 47 is formed in a concave shape on the outer periphery of the lower end portion. 46 is arranged and welded to be integrated into one body, fixed to the shaft 45 with a fixed metal 49 and a fixed metal 54, and the exhaust tube 47 is also moved when the shaft 45 moves up and down.

  The driving device 40 that drives the exhaust pipe 47 will be described with reference to FIG. 6. The driving device 40 includes a tip end of a shaft 57 of an electric jack 56 that is attached to the lower side of the bottom plate 42 of the exhaust gas distribution box 22 with a support base 55. The flange 58 provided in the section is connected to the lower end flange 59 of the shaft 45, and when the electric motor 53 of the electric jack 56 is operated, the shaft 57 is moved upward or downward to move the shaft 45 up and down, thereby The cylinder 47 moves.

  The exhaust gas distribution operation will be described with reference to FIG. 7. In FIG. 7, the hatched portion indicates the passage state of the exhaust gas, and when the electric jack 56 is operated downward, the shaft 57 is lowered, and the shaft 45 and the exhaust cylinder 47 are moved. When the lower surface of the concave ring 46 comes into contact with the upper surface of the seal ring 43, the inside of the exhaust cylinder 47 is closed, and the upper end of the exhaust cylinder 47 descends to lower the lower end of the exhaust gas short pipe 6a. The air passage 52 between the exhaust pipe 24 and the exhaust cylinder 47 on the heat medium oil tank 21 side is released, and the exhaust gas entering from the exhaust gas inlet 3a passes through the air passage 52. Then, the wall surface of the heat medium oil tank 21 is heated, the internal heat medium oil is heated, and becomes a heating path that is discharged via the exhaust gas short pipe 6a.

  The operation in which the exhaust gas becomes a bypass circuit that avoids the air passage 52 in the heat transfer oil tank 21 will be described with reference to FIG. 8. In the figure, the hatched portion indicates the exhaust gas passage state, and the electric jack 56 rises. When operated, the shaft 57 rises, the shaft 45 and the exhaust cylinder 47 rise together, and when the upper surface of the concave flange 46 comes into contact with the lower surface of the connection ring 39, the upper end portion of the exhaust pipe 47 becomes the exhaust gas. By wrapping upward from the inner lower end of the short pipe 6a, the air passage 52 of the heat transfer oil tank 21 is closed, and the exhaust gas entering from the exhaust gas inlet 3a passes through the inside of the exhaust pipe 47. Then, it is discharged via the exhaust gas short pipe 6a, and the heat transfer oil tank 21 is not heated.

  Regarding the heat medium oil control, when the heat medium oil temperature becomes higher than the set temperature upper limit value of the heat medium oil, the drive device 40 operates so that the electric jack 56 rises, and the heat medium oil tank 21 The air passage 52 is closed, the supply of exhaust gas is stopped, the temperature of the heat transfer oil gradually decreases, and when the lower limit temperature is reached, the drive device 40 operates to lower the electric jack 56 and the inlet of the exhaust pipe 47 Is closed, the air passage 52 of the heat transfer oil tank 21 is released, exhaust gas is supplied, and the heat transfer oil temperature gradually rises. The temperature of the heat transfer oil can be controlled between ON and OFF between the set temperature upper limit value and the set temperature lower limit value.

    In order to make the control range smaller than the ON-OFF control in the heat medium oil control, the control amount value obtained as a result of the operation is compared with the set temperature (target value), and the operation is corrected by the judgment, that is, the correction operation It is also possible to perform feedback control such that

1a Engine 2a Exhaust pipe 3a Exhaust gas inlet 4a Heat medium oil heater 5a Exhaust gas pipe 6a Exhaust gas short pipe 7a Heat medium oil take-off pipe 8a Heat medium oil supply pipe 9a Heat medium oil circulation pump 10a Heat medium pipe 11a Heat medium pipe 12a Heat Oil heat exchanger 13a Heat medium pipe 14a Heat medium pipe 15a Overflow pipe 16a Heat medium drop pipe 17a Vent pipe 18a Expansion tank 19a Heat medium oil drain tank 21 Heat medium oil tank 22 Exhaust gas distribution box 24 Exhaust pipe 25 Ring 26 Ring 27 Outer pipe 28 Connecting ring 29 Connecting ring 30 Vault 31 Vertical rib 32 Horizontal rib 33 Opening 34 Horizontal rib 35 Opening 36 Oil passage 39 Connecting ring 40 Driving device 41 Vault 42 Bottom plate 43 Seal ring 44 Lower end ring 45 Shaft 46 鍔 47 Exhaust cylinder 49 Fixed Hardware 50 Penetration Hardware 52 Air Path 53 Electric Motor 54 Fixed Hardware 55 Supporting Base 56 Electric Jack 5 Axis 58 flange 59 flange

Claims (2)

A heat transfer oil tank that heats the heat transfer oil directly by exhaust gas heat is provided on the outer periphery of the exhaust pipe of the engine, and an exhaust pipe having a flange at the lower end is fixed to a shaft arranged on the center line of the exhaust pipe, and the shaft is moved up and down. The exhaust pipe moves in conjunction with each other, and the inside of the heat transfer oil tank is provided with vertical ribs between the upper and lower sides, and the inside is divided into two, and the heat transfer oil repeats at the vertical ribs as a boundary. A heat transfer oil boiler, characterized in that a single oil passage is provided to flow in a horizontal state along the outer periphery of the exhaust pipe so as to be reversed.   The exhaust pipe operates the shaft upward, and when the soot moves to the lower part of the exhaust pipe, the soot closes the air passage between the outside of the exhaust pipe and the exhaust pipe, and the inside of the exhaust pipe A bypass circuit through which the exhaust gas passes through the air passage, and when the shaft is operated downward and the exhaust pipe is moved to the lower end, the soot contacts the seal ring and closes the air passage inside the exhaust pipe. The heating medium oil boiler according to claim 1, further comprising a heating path through which exhaust gas passes through the air path between the outside of the exhaust pipe and the exhaust pipe.