JPS597713A - Thermal power equipment - Google Patents

Abstract

PURPOSE:To prevent a turbine from damage due to a mist, by returning a liquefied medium, partly extracted from the half way from a condenser to an evaporator of from the condenser, through an oil separator to the condenser and suppressing a violet foaming phenomenon in the evaporator. CONSTITUTION:A liquefied medium mixed with lubricating oil is extracted from a conduction pipe 30 from a condenser 10 to a medium pump 11 through a valve 50 and a check valve 51 by the amount, in which concentration of lubricating oil in the liquefied medium can suppress a violent foaming phenomenon in an evaporator 12, and supplied to an oil separator 18. Here the medium is heated by sea water flowing in a heat transfer pipe 20d, and the evaporated liquefied medium is returned to the condenser 10 again liquefied, while lubricating oil is gradually condensed and drawn out to a drain oil tank 19 by a periodically opening valve 52. In this way, a violent foaming phenomenon in the evaporator 12 is suppressed, and the vaporized medium can be supplied to a turbine 13 without accompanying a large amount of mist, in consequence the turbine can be prevented from damage.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to cold power generation equipment, and particularly to cold power generation equipment having a Rankine cycle (hereinafter abbreviated as cold power generation).

A conventional cold eruption example will be explained with reference to FIG.

In FIG. 1, a condenser 10 and a Rankine medium pump (hereinafter abbreviated as medium pump) 11. Medium pump 11, evaporator 12, evaporator and expansion turbine (hereinafter abbreviated as turbine) 13. The turbine 13 and the condenser 10 are connected through conduits to blades to form a closed circuit, and the turbine 13 is connected to a power generation a14. Heat exchanger tube 2 is used for condensation H10.
0a is folded inwards, and a conduit 0a connected to a low temperature liquefied gas liquid feeding pump (hereinafter abbreviated as liquid feeding pump) 15 is connected to one end thereof. The liquid pump 15 and the low temperature liquefied gas storage tank (hereinafter abbreviated as tank) 16 are connected through a conduit. The other end of the heat exchanger tube 20a is connected to the heating H17 between the conduits. A conduit 37 that is connected to a separate user (not shown) is connected to the heating a17. heating a1
7 has a heat transfer tube 20b installed therein, one end of which is connected between the conduits, and the other end of which is connected to a conduit 39. A heat transfer tube 20c is arranged inside the evaporator 12, and one end of the heat transfer tube 20c is connected to a conduit 39, and the other end thereof is connected to a conduit package that is open to a heat medium discharge path (hereinafter referred to as a discharge path) 50a. There is. Note that Freon, propane, etc. are used as the Rankine medium (hereinafter abbreviated as medium).

The vaporized medium (hereinafter abbreviated as vaporized medium) is supplied from the tank 16 to the heat transfer tube 20a via the liquid feed pump 15 and the conduit 35° in the condenser 10, and is a low-temperature liquefied gas flowing through the heat transfer tube 20a. For example, condensation using the cold energy of LNG,
liquefied. The liquefied medium (hereinafter abbreviated as liquefied medium) is transferred from the condenser IO to a conduit (supply) via a medium pump 11.
31 and is supplied to the evaporator 12. A part of this liquefied medium is supplied to the heat exchanger tube 20c through the evaporator, the conduit O, the heat exchanger tube 20b, and the conduit 39, and after flowing through the heat exchanger tube 20c, it is heated and discharged from the conduit 50a to the discharge path 50a. heated and vaporized by a source, e.g. seawater. This vaporizing medium evaporates! It is supplied from 1112 to the turbine 13 via a conduit, and expands there to drive the turbine 2131 power generation M114. The vaporized medium expanded in the turbine 13 is circulated from the turbine 13 through the conduit O to the condenser IO, where it is condensed again.

liquefied. On the other hand, LNG vaporized by condensing and liquefying the vaporization medium while flowing through the heat exchanger tube 20a is supplied to the warmer 17 through the conduit, and here, is supplied to the heat exchanger tube 20b from the conduit, After flowing through the heat exchanger tube 20b, the seawater is heated by the seawater supplied to the heat exchanger tube 20c from the conduit 39, and then separately sent to the user via the conduit 37 from the warmer 17.

Such cold light is caused by oil, for example, when the vaporized medium expands in a turbine, the lubricating oil used in the turbine mixes with the vaporized medium, thus increasing the lubricating oil concentration of the liquefied medium in the evaporator. As a result, a severe foaming phenomenon occurs in the evaporator, and as a result, a large amount of mist entrained vaporized medium is supplied to the turbine, which damages the turbine and makes it impossible to operate the cold light continuously. There was a drawback that it disappeared.

The object of the present invention is to eliminate the above-mentioned drawbacks and thereby provide a light-emitting device that can be operated continuously.

The feature of the present invention is that it is easy to use! From the liquefied medium that is being fed from the vessel to the evaporator or partially extracted from the condenser,
An oil separator is provided to separate oil mixed in the liquefied medium, and a conduit is connected to the oil separator and condenser to return the vaporized medium from which the oil has been separated by the kernel oil separator to the condenser. ,
The purpose is to reduce the oil concentration of the liquefied medium in the evaporator to suppress severe foaming.

An embodiment of the present invention will be explained with reference to FIG. In addition, the second
In the figure, the same devices and the like as in FIG. 1 are denoted by the same reference numerals and explanations will be omitted.

In FIG. 2, the oil separation 818 is branched from a conduit (supply),
A conduit 41 provided with a check valve 51 is connected between the valves. A conduit 42 is connected to the top of the oil separator 18 and conduit 42 is connected to the top of the condenser 10 . Oil separation a
A conduit 43 connected to the drain oil tank 19 and provided with a valve 52 is connected to the bottom of the drain 18 . The oil separator 18 is equipped with a heat transfer tube 20d, at one end of which there is a conduit I branched from the conduit and provided with a valve part, and at the other end there is a conduit I which is open to the discharge ysob. connected.

Steam 3? The vaporized medium supplied to the turbine 13 via the conduit 32 from the
The lubricating oil used in step 3 is mixed into the vaporizing medium. @The vaporized medium mixed with lubricating oil is circulated and supplied from the turbine 13 to the condenser 10 via the conduit O, and here, it is supplied from the tank 16 via the liquid feed pump 15 to the heat transfer tubes 20a via conduits A and 34. It is condensed and liquefied using the cold heat of LNG flowing through 20a. The liquefied medium mixed with this lubricating oil is
The lubricant is supplied from the condenser 10 to the evaporator 12 via the medium pump 11 and the conduit 31. However, if this state is maintained, the lubricating oil concentration of the liquefied medium in the evaporator ν will increase. Severe foaming phenomenon begins to occur. Therefore,
By controlling the liquefied medium mixed with lubricating oil flowing along the conduit side toward the medium pump 11, for example, by adjusting the opening between the valves, the concentration of the lubricating oil in the liquefied medium in the evaporator 12 can be increased by a severe foaming phenomenon. An amount (hereinafter abbreviated as a predetermined amount) that is below the concentration that can suppress the oil is extracted and supplied to the oil separator 18 via a conduit 41 via a check valve 51 and a check valve 51. By opening the valve 53, the liquefied medium mixed with lubricating oil is supplied to the heat transfer tube 20d via conduits A and 44, and after flowing through the heat transfer tube 20d, is heated by seawater discharged from the conduit 45. . Due to this heating, the liquefied medium is evaporated and separated from the lubricating oil. The vaporized medium flows through the conduit 42 from the oil separation a18 and condenses H1.
01, where it is condensed and liquefied again. on the other hand,
After the lubricating oil is gradually concentrated in the oil separator 18, by periodically opening the valve 52, the lubricating oil is discharged from the oil separator 18 through the valve 52 and through the conduit into the waste oil tank 19 for processing.

In the cold light system of this embodiment, a predetermined amount of the liquefied medium mixed with lubricating oil that is being fed from the condenser to the evaporator is extracted and supplied to the oil separator, where the medium and lubricating oil are separated. Since it is separated, the lubricating oil concentration of the liquefied medium in the evaporator does not increase, and severe foaming phenomenon in the evaporator can be suppressed. Therefore, the vaporized medium is supplied to the turbine without being entrained in a large amount of mist. This prevents damage to the turbine and allows continuous cold light operation.

In this example, the liquefied medium mixed with lubricating oil is extracted on the way from the condenser to the evaporator and supplied to the oil separator. The oil may be directly extracted from the condenser and supplied to the oil separator.

As explained above, the present invention provides an oil separator that separates oil mixed in the liquefied medium while it is being fed from the condenser to the evaporator or partially extracted from the condenser. At the same time, the vaporized medium from which oil has been separated by the oil separator is #! By connecting the conduit that returns to the condenser with the oil separator and condenser, it is possible to suppress the severe foaming phenomenon in the evaporator and to supply the vaporized medium to the turbine without entraining a large amount of mist, thereby preventing damage to the turbine. It has the effect of being able to prevent cold light and operate the cold light continuously.

[Brief explanation of drawings]

FIG. 1 is a system diagram of a conventional cold light having a 2-rankine cycle, and FIG. 2 is a system diagram showing an embodiment of a cold light having a Rankine cycle according to the present invention.

Claims (1)

[Claims] 1. In a cold-thermal power generation facility having a Rankine cycle and consisting of a condenser, an evaporator, an expansion turbine, and a generator, the condenser is condensed and liquefied in the condenser and is sent to the evaporator or from the condenser. An oil separator is installed to separate the oil mixed in the medium from the partially extracted Rankine medium, and the oil is separated by the oil separator, evaporated, and a conduit is installed to return the vaporized Rankine medium to the condenser. A cold power generation facility characterized by being connected to a separator and a condenser.