JP2007303627A - Steam eliminator for steam trap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small and inexpensive steam eliminator for a steam trap, capable of making cloudy steam with re-evaporation of condensed water, inconspicuous. <P>SOLUTION: A long tube 4 formed with a steam-liquid separation film is connected to an outlet 2 of the steam trap 3. The tube 4 has a number of pores in the surface, and the plurality of ones are spirally bent when mounted. An L-shaped elbow 5 is connected to the right ends of the plurality of spiral tubes 4. The high-temperature condensed water drained from the outlet 2 of the steam trap 3 is cooled with its heat released into the atmosphere during a time when distributing in the long tubes 4 formed with the steam-liquid separation films and flowing down. When drained from a small-diameter through-hole 6 of an orifice plate 7 into the atmosphere, the condensed water has a lower temperature to prevent the rise of cloudy steam with re-evaporation. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a steam trap water heater capable of preventing smoky and rising steam accompanying re-evaporation of condensate discharged from the outlet of the steam trap.

  The steam trap water heater is equipped with a discharge pipe and an upper and lower water reservoir at the outlet of the steam trap, and the re-evaporated steam rises rapidly by passing through the upper water reservoir and cooling it. Steam vapor can be prevented.

In this steam trap water heater, it is necessary to provide a large number of water reservoirs above and below the discharge pipe in order to securely extinguish the steam, and the water heater itself becomes large and expensive. There was a problem.
Japanese Examined Patent Publication No. 4-67080

  The problem to be solved is to provide a small and inexpensive steam trap water heater that can surely obscure the smoky steam accompanying re-evaporation of the condensate.

  In the present invention, steam that permeates vapor but does not allow liquid to permeate to the outlet side of the steam trap in the condensate discharged from the outlet of the steam trap to the atmosphere to prevent re-evaporation and rise. By connecting a long narrow tube formed of a liquid separation membrane, the condensed water re-evaporates and the heat held by the condensed water is released into the atmosphere while the condensed water flows down in the narrow tube. The steam that rises up and gets wet is inconspicuous.

  The steam trap water heater according to the present invention has a long thin tube formed by a gas-liquid separation membrane attached to the outlet side of the steam trap, while the condensate flows down the entire length of the long thin tube. A small amount of condensate is re-evaporated from the surface and dissipated into the atmosphere through the fine pores of the narrow tube, and the condensate is cooled by dissipating the heat held by the condensate into the atmosphere, and In addition, since the re-evaporated vapor is dissipated every minute from the entire outer surface of the long thin tube, the re-evaporated vapor does not rise together from one place and the steam does not stand out. Therefore, the steam trap can be a small and inexpensive steam trap.

  In the present invention, a long thin tube formed of a gas-liquid separation membrane is used. As the gas-liquid separation membrane, a hydrophobic porous membrane conventionally used in a membrane distillation method or the like is used. In addition, the diameter and length of the narrow tube can be appropriately selected according to the amount and temperature of the condensate discharged from the outlet of the steam trap.

  In this embodiment, as shown in FIG. 1, a steam trap 3 having an inlet 1 and an outlet 2, and a spiral tubule 4 formed of a plurality of gas-liquid separation membranes connected to the outlet 2 of the steam trap 3, Construct a steam trap water heater.

  By connecting the inlet 1 of the steam trap 3 to a steam using device (not shown), a mixed fluid of the condensate condensed with the steam and the partial steam flows in the steam trap 3. The steam trap 3 is a kind of automatic valve that discharges condensate from the outlet 2 to the outside, but does not discharge steam.

  In this embodiment, the long tubules 4 formed of a gas-liquid separation membrane are each bent and attached in a continuous spiral shape. Although not illustrated on the outer surface of the long thin tube 4, it has a large number of minute pores that allow vapor as a gas to pass through but do not allow liquid to pass through. Further, the plurality of spiral capillaries 4 are arranged so as not to contact each other as much as possible so that heat radiation to the atmosphere and vapor diffusion are not hindered.

  An elbow 5 that is an L-shaped piping member is connected to the right end of the plurality of spiral tubules 4. Both ends of the plurality of spiral capillaries 4 are connected to the outlet 2 of the steam trap 3 and the connection portion of the elbow 5 in an airtight manner by welding or brazing. The total effective inner diameter sectional area of the narrow tube 4 formed of the gas-liquid separation membrane is selected so as to be as equal as possible to the inner diameter sectional area of the outlet 2 of the steam trap 3 and the inner diameter sectional area of the elbow 5.

  An orifice plate 7 provided with a small diameter through hole 6 is attached to the lower end of the elbow 5. The cross-sectional area of the small-diameter through-hole 6 is made smaller than the inner-diameter cross-sectional area of the elbow 5 so as to perform the squeezing action.

The condensate discharged from the outlet 2 of the steam trap 3 is in a high temperature state, and part of the condensate evaporates again outside the narrow tube 4 while being distributed and flowing down in the narrow tube 4 formed by the gas-liquid separation membrane. The heat is dissipated into the atmosphere by being diffused into the atmosphere from a large number of pores on the surface, and the condensate is cooled. In this case, since the re-evaporated vapor that is diffused into the atmosphere is dispersed and diffused from the entire outer surface of the plurality of long tubules 4, the re-evaporated vapor stands almost completely as compared with the case where it is re-evaporated from one place. The rising steam becomes inconspicuous.

Furthermore, while the condensate flows down through the long narrow tube 4, there is heat radiation to the atmosphere through the tube wall of the narrow tube 4, and the condensate is cooled to a predetermined temperature before flowing down to the elbow 5 side. Is done.

When the condensate is discharged into the atmosphere from the small-diameter through-hole 6 of the orifice plate 7 at the lower end of the elbow 5, the temperature is lowered, and it does not evaporate again and the moisture and steam rise. Further, by attaching the long thin tube 4 by bending it into a spiral shape, it is possible to secure a larger heat radiating surface area of the thin tube 4 and to promote cooling of the condensate.

  The condensate discharged from the outlet 2 of the steam trap 3 is narrowed in the elbow 5 and the elbow 5 formed by a gas-liquid separation membrane by narrowing the flow path in the elbow 5 by the small diameter through-hole 6. For a long time, and heat release to the atmosphere is further promoted.

In this way, by simply connecting the long thin tube 4 formed of a gas-liquid separation membrane to the outlet 2 of the steam trap 3, the steam that has become moyah accompanying the re-evaporation of the condensate can be reliably made inconspicuous. It can be a small and inexpensive steam trap water heater.

  The length of the long thin tube 4 can be appropriately selected according to the amount of condensate discharged from the steam trap 3, the temperature, and the tube diameter of the thin tube 4.

The partial cross section block diagram which shows the Example of the water heater of the steam trap of this invention.

Explanation of symbols

1 Inlet 2 Outlet 3 Steam trap 4 Narrow tube formed with gas-liquid separation membrane 5 Elbow 6 Small diameter through hole 7 Orifice plate

Claims (1)

A steam / liquid separation membrane that allows vapor to permeate but does not allow liquid to permeate at the outlet side of the steam trap. The long, narrow tubules that have been formed are connected in series, and while the condensate flows down through the tubules, the condensate re-evaporates to dissipate the heat held by the condensate into the atmosphere. A steam trap water heater that makes the rising steam inconspicuous.

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