JP2009121757A - Steam heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steam heating device capable of surely supplying the necessary amount of steam even when a steam using device is increased a steam consumption. <P>SOLUTION: A high-pressure steam pipe 6 is connected with a steam supply pipe 2 through a steam ejector 4. A bypass steam pipe 5 bypassing the steam ejector 4 is respectively connected with a primary side and a secondary side of the steam ejector 4. An upper portion of a heated effluent pipe 11 is connected with a suction chamber 8 of the steam ejector 4 by a connection pipe 12. When the amount of steam necessary in a heat exchange chamber 1 is small, the heating is performed only by the steam flowing down in the steam ejector 4, and when the amount of steam necessary in the heat exchange chamber 1 is increased, the steam to compensate the shortfall is supplied from the bypass steam pipe 5 to surely supply the steam necessary in the heat exchange chamber 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a steam heating apparatus that heats a heat exchange object by exchanging heat in the heat exchange chamber.

A conventional steam heating apparatus is provided with an evaporation container into which warm wastewater flows and a decompression means for maintaining the evaporation container at a desired vacuum level, and supplies the vacuum steam generated in the evaporation container to the vacuum steam using apparatus. The object to be heated in the vacuum vapor using apparatus can be heated.

The conventional steam heating apparatus has a problem that it cannot follow when the consumption of steam in the vacuum steam using apparatus fluctuates. In particular, there is a problem that it becomes impossible to follow when the steam consumption greatly increases. This is because the amount of steam that can be passed through the steam ejector is limited.
Japanese Patent No. 2916699

  The problem to be solved is to obtain a steam heating device that can reliably supply a necessary amount of steam even when the amount of steam consumed in the steam using device increases.

  The present invention connects a suction means to a heat exchange chamber that heats a heat exchange object, connects a steam supply pipe that supplies heating steam to the heat exchange chamber, and connects one end of the steam supply pipe to a high-temperature state. Connected to a re-evaporated steam source re-evaporated from the warm water drainage, the re-evaporated steam source is a warm drain pipe that flows down the warm drainage, and a steam ejector is interposed in the steam supply pipe to suck the steam ejector. The chamber is connected to a re-evaporation vapor source, and a bypass vapor pipe that bypasses the steam ejector is attached.

  In the present invention, when a required steam amount in the heat exchange chamber is increased by attaching a bypass steam pipe that bypasses the steam ejector, the necessary steam is reliably supplied from the bypass steam pipe without going through the steam ejector. can do.

  The present invention is provided with a bypass steam pipe that bypasses the steam ejector, but if the bypass steam pipe can communicate with the primary side and the secondary side of the steam ejector, the pipe diameter, the pipe length, etc. Can be selected as appropriate.

In FIG. 1, the heat exchange chamber 1 in the form of a sealed tank, the steam supply pipe 2 connected to the upper part of the heat exchange chamber 1, the suction means 3 connected to the lower part of the heat exchange chamber 1, and the steam supply pipe 2 are attached. The steam ejector 4 and the bypass steam pipe 5 constitute a steam heating device.

  A high pressure steam pipe 6 connected to a high pressure steam source (not shown) is connected to the primary side of the steam ejector 4 attached to the steam supply pipe 2. The high-pressure steam pipe 6 is connected to a suction chamber 8 containing a nozzle of the steam ejector 4 via a control valve 7. The diffuser part 9 of the steam ejector 4 is connected to the steam supply pipe 2.

 A bypass steam pipe 5 that connects the primary side and the secondary side of the steam ejector 4 is attached. The bypass steam pipe 5 has a control valve 10 for controlling the amount of steam flowing down. The bypass steam pipe 5 can cause the steam of the high-pressure steam pipe 6 to flow down to the steam supply pipe 2 without going through the steam ejector 4.

Below the steam ejector 4, a hot drain pipe 11 through which hot waste water in a high temperature state flows is disposed. A part of the hot waste water at a high temperature is re-evaporated into steam in the warm drain pipe 11 and is sucked into the suction chamber 8 of the steam ejector 4 from the connection pipe 12. Therefore, in this embodiment, the hot drain pipe 11 constitutes a re-evaporation vapor source.

The lower end of the steam supply pipe 2 is connected to the upper part of the heat exchange chamber 1, and the condensate discharge pipe 13 is connected to the lower part of the heat exchange chamber 1. An object to be heated (not shown) housed in the heat exchange chamber 1 is heated with heating steam supplied from a steam supply pipe 2.

The suction means 3 includes a liquid ejector 14, a liquid tank 15, a circulation pump 16, and a circulation path 17. The condensate discharge pipe 13 of the heat exchange chamber 1 is connected to the suction chamber 18 of the liquid ejector 14. A liquid supply pipe 19 is connected to the upper left portion of the liquid tank 15, and a part of the circulation path 17 is branched to connect the surplus fluid discharge pipe 20.

  The suction means 3 sucks and discharges the liquid in the liquid tank 15 by the circulation pump 16 and supplies it to the liquid ejector 14, thereby generating suction force in the suction chamber 18, and condensate from the condensate discharge pipe 13. Can be aspirated.

  When the object to be heated in the heat exchange chamber 1 is heated, it can be heated by supplying a predetermined amount of steam maintained at a predetermined temperature from the steam supply pipe 2 to the heat exchange chamber 1. When the amount of steam required in the heat exchange chamber 1 is small, heating is performed only with the steam flowing down the steam ejector 4, and the amount of steam required in the heat exchange chamber 1 is increased. When the steam alone is insufficient, the steam necessary for the heat exchange chamber 1 can be reliably supplied by supplying the insufficient steam from the bypass steam pipe 5.

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

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat exchange chamber 2 Steam supply pipe 3 Suction means 4 Steam ejector 5 Bypass steam pipe 6 High pressure steam pipe 8 Suction chamber 11 Warm drain pipe 12 Connection pipe 13 Condensate discharge pipe 14 Liquid ejector 15 Liquid tank 16 Circulation pump 17 Circulation path 18 Suction chamber

Claims (1)

A suction means is connected to the heat exchange chamber for heating the heat exchange material, a steam supply pipe for supplying heating steam to the heat exchange chamber is connected, and one end of the steam supply pipe is connected to the hot waste water in a high temperature state. When connected to a re-evaporated re-vaporization source, the re-evaporation vapor source is a warm drainage pipe through which the warm drainage flows, and a steam ejector is interposed in the steam supply pipe to re-evaporate the suction chamber of the steam ejector. A steam heating apparatus comprising a bypass steam pipe which communicates with a steam source and bypasses a steam ejector.

Images