JP2009191783A - Steam ejector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steam ejector capable of efficiently recovering a calorific value possessed by a high temperature condensate from a plurality of high temperature condensate pipes. <P>SOLUTION: A driving steam supply pipe 14 is connected to the nozzle part inlet end of a suction chamber 2 of an ejector 1. A condensate collecting pipe 3 is connected to the suction chamber 2 via a pipe 5. A large number of condensate discharge pips 4 are connected to the condensate collecting pipe 3 by interposing an opening-closing valve 11. A diffuser 6 of the ejector 1 is connected to a steam distributing supply pipe 8. A plurality of steam supply pipes 9 are connected to the steam distributing supply pipe 8. The calorific value possessed by the high temperature condensate can be efficiently recovered from a plurality of high temperature condensate discharge pipes 4 by connecting the condensate collecting pipe 3 connected with the plurality of condensate discharge pipes 4 with the suction chamber 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a steam ejector that ejects drive steam from a nozzle at high speed and generates suction force in a suction chamber by velocity energy of the fluid.

  The steam ejector is connected to a pressure control valve on the inlet side of a suction chamber with a built-in nozzle, and a pressure sensor is attached to the outlet side of the diffuser, and the valve opening of the pressure control valve is driven according to the detected value of this pressure sensor. By controlling, the suction force generated in the suction chamber can be controlled.

In this steam ejector, there is a problem that the amount of heat stored in the high-temperature condensate cannot be effectively used. Normally, steam condenses into condensate by working and deprived of heat, but this condensate is in a high temperature state and still has a large amount of heat, so it must not be disposed of outside. In this steam ejector, there is one intake steam pipe 4 that collects high-temperature condensate or reevaporated steam that has been re-evaporated from high-temperature condensate. This is because the amount of heat retained by the high-temperature condensate cannot be efficiently recovered.
JP 2003-269400 A

  The problem to be solved is to provide a steam ejector that can efficiently recover the amount of heat stored in the high-temperature condensate from a plurality of high-temperature condensate pipes.

  The present invention comprises a nozzle part composed of pores for restricting fluid, a suction chamber formed around the nozzle part, and a diffuser communicating with the suction chamber and the nozzle part. A plurality of condensate discharge pipes are connected to the condensate collecting pipe through a valve means, and a diffuser is connected to the steam distribution supply pipe, and the valve means is interposed in the steam distribution supply pipe. Thus, a plurality of steam supply pipes are connected.

  The steam ejector according to the present invention efficiently recovers the amount of heat held by the high-temperature condensate from the plurality of high-temperature condensate discharge pipes by communicating the condensate collecting pipe connected to the plurality of condensate discharge pipes with the suction chamber. be able to.

  In the present invention, the suction chamber communicates with the condensate collecting pipe, and it is preferable to use a long pipe as the condensate collecting pipe so that many condensate discharge pipes can be connected. .

  In FIG. 1, a steam ejector is composed of an ejector 1, a condensate collecting pipe 3 communicating with the suction chamber 2 of the ejector 1 via a pipe line 5, and a plurality of condensate discharge pipes 4 connected to the condensate collecting pipe 3. Constitute.

  The plurality of condensate discharge pipes 4 are provided with on-off valves 11 as valve means for opening and closing the pipe lines. Further, a steam trap 13 is attached to the bottom of the long condensate collecting pipe 3 with a pipe 12 interposed. The steam trap 13 is a kind of automatic valve, and in the mixed fluid of condensate and steam flowing in from the inlet side, only the condensate is discharged to the outlet side, while the steam is discharged to the outlet side. There is nothing.

  The diffuser 6 of the ejector 1 is connected to the vapor distribution supply pipe 8 via a pipe line 7. A plurality of steam supply pipes 9 are connected to the steam distribution supply pipe 8. Each steam supply pipe 9 is provided with an on-off valve 10.

  An inlet end of a nozzle portion (not shown) built in the suction chamber 2 of the ejector 1 is connected to the drive steam supply pipe 14. By supplying high-pressure steam from the drive steam supply pipe 14 to the ejector 1, suction force can be generated in the suction chamber 2.

  The ends of the plurality of condensate discharge pipes 4 are connected to a condensate discharge point such as a steam using device (not shown). Accordingly, the high-temperature condensate generated by the steam using device or the like flows from the plurality of condensate discharge pipes 4 into the condensate collecting pipe 3. A part of the high-temperature condensate in the condensate collecting pipe 3 is re-evaporated to become re-evaporated steam, which is sucked into the suction chamber 2 of the ejector 1 and mixed with the driving steam to reach the steam distribution supply pipe 8 from the diffuser 6. .

The remaining condensate that has not re-evaporated in the condensate collecting pipe 3 is automatically discharged from the steam trap 13 to the outside.

  The ends of the plurality of steam supply pipes 9 connected to the steam distribution supply pipe 8 are connected to a steam using device such as a heat exchanger (not shown). Therefore, the mixed steam of the drive steam and the re-evaporated steam supplied from the ejector 1 is supplied from the respective steam supply pipes 9 to the required steam using device in the required amount.

  In the present embodiment, the condensate collecting pipe 3 connected to the plurality of condensate discharge pipes 4 is communicated with the suction chamber 2, so that the amount of heat that the high-temperature condensate efficiently holds from the plurality of high-temperature condensate discharge pipes 4 Can be recovered.

The block diagram which shows the Example of the steam ejector of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ejector 2 Suction chamber 3 Condensate collecting pipe 4 Condensate discharge pipe 6 Diffuser 8 Steam distribution supply pipe 9 Steam supply pipe 13 Steam trap 14 Drive steam supply pipe

Claims (1)

In the nozzle portion composed of pores for restricting the fluid, a suction chamber formed around the nozzle portion, and a diffuser communicating with the suction chamber and the nozzle portion, the suction chamber is communicated with the condensate collecting pipe. The condensate collecting pipe is connected to a plurality of condensate discharge pipes through a valve means, the diffuser is connected to the steam distribution supply pipe, and the steam distribution supply pipe is connected to a plurality of valve means. A steam ejector characterized by connecting a steam supply pipe.

Images