JP2012062812A - Waste steam recovery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waste steam recovery device capable of effectively reusing waste steam from a steam device.SOLUTION: A heating steam supply pipe 2 is connected to a vulcanization can 1. A steam compression expander 4 and the sealed tank-shaped steam device 5 are connected to a steam pipe 3 of the vulcanization can 1 by interposing a plurality of switching valves 6, 7, 8, 9, 10 and 11. The steam compression expander 4 is constituted of a pair of right-left female-male screw type rotor parts 12 and a generator 13. The waste steam remaining in the vulcanization can 1 passes through the steam compression expander 4, and is recovered to the sealed tank-shaped steam device 5, and this recovered waste steam is supplied again to the vulcanization can 1 when performing vulcanization by the vulcanization can 1, so that the waste steam can be effectively reused.

Description

The present invention relates to a waste steam recovery apparatus capable of recovering the remaining steam used in a steam apparatus such as a rubber vulcanizing can so that it can be reused instead of being discarded.

The waste steam recovery unit is a shrink tunnel that uses steam, and vacuum suction means that consists of an ejector, a liquid tank, and a circulation pump connected by a waste steam recovery pipe. By sucking with the sucking means, it is possible to eliminate waste steam that can get trapped.

  In this waste steam recovery device, there is a problem that the waste steam is only recovered into the liquid tank, and the waste steam cannot be effectively reused.

Japanese Patent Laid-Open No. 2002-5582

  The problem to be solved is to provide a waste steam recovery device capable of effectively reusing waste steam from a steam device.

In the present invention, waste steam flowing down from a steam device via a steam pipe is discharged to a predetermined location. A steam compression and expansion machine is disposed in the steam pipe, and the compression and expansion of the steam compression and expansion machine are performed. The steam compression and expansion machine is connected to a generator and a closed tank steam device.

  The waste steam recovery apparatus of the present invention is left in the steam apparatus by disposing a steam compression and expansion machine in the steam pipe for discharging steam from the steam apparatus and connecting it to the generator and the closed tank steam apparatus. If the waste steam is high pressure, it can be generated by a generator while being expanded by a steam expander and recovered in a closed tank steam device, while if the waste steam remaining in the steam device is low pressure, The low-pressure steam is compressed by a compressor and converted into high-pressure steam, and can be recovered in a sealed tank-like steam device.

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

  The waste steam recovery apparatus of the present invention uses a steam compressor and expander. As the steam compressor and expander, a screw compressor that has been widely used for refrigeration, air conditioning, and gas compressors has been steam-compressed. On the other hand, as a steam expander, by utilizing the reverse cycle of the screw compressor, that is, by reversing the steam inlet and outlet of the screw compressor, high pressure steam is injected from the outlet side, and the inlet It can be used as a steam expander by letting low-pressure steam expanded from the side and having a reduced pressure flow down. Furthermore, a conventionally well-known steam compressor can be used as a steam compressor, and its reverse cycle can be used as a steam expander.

In FIG. 1, a rubber vulcanizing can 1 as a steam device, a heating steam supply pipe 2 for supplying steam for heating to the vulcanizing can 1, and a steam pipe 3 for discharging steam remaining from the vulcanizing can 1 The steam compression and expansion machine 4 and the closed tank steam device 5 constitute the waste steam recovery device of the present invention.

In the steam pipe 3 for discharging the steam remaining from the vulcanizing can 1, a plurality of switching valves 6, 7, 8, 9, 10, and 11 for switching between compression and expansion in the steam compression and the expander 4 are arranged, A switching line corresponding to each switching valve is formed.

A steam compression and expansion machine 4 is connected below the switching valve 7 of the steam pipe 3. In this embodiment, an example using a screw type vapor compression and expansion machine 4 is shown. The screw type vapor compression and expansion machine 4 is composed of a pair of left and right male and female screw type rotor parts 12 and a generator 13.

  The rubber (not shown) inside the vulcanizing can 1 is vulcanized by the steam supplied from the heating steam supply pipe 2 to the vulcanizing can 1. When the vulcanization is completed and the steam remaining in the vulcanizing can 1 is at a high pressure, the switching valves 6, 7, 8, and 9 are opened to supply the high-pressure steam from the left side of the screw-type rotor unit 12. The high-pressure steam expands while rotating the screw-type rotor unit 12, is decompressed, and is supplied to the steam device 5 in a sealed tank shape and recovered. In this case, the rotational driving force of the screw-type rotor unit 12 rotates the connected generator 13 to generate predetermined power.

  On the other hand, when the steam pressure in the vulcanizing can 1 is lower than the steam pressure in the closed tank steam device 5, the switching valves 6, 10, 8, 7, 11 are opened and the low pressure steam is screwed. By supplying the screw rotor unit 12 from the right side of the rotor unit 12 from the right side, that is, from the direction opposite to the above-described decompression and expansion, the screw rotor unit 12 is driven by an electric motor (not shown) built in the generator 13. Driven by rotation, the low-pressure steam is compressed and boosted to a predetermined pressure, and is supplied to the sealed tank-like steam device 5 and collected. In this way, the steam from the high pressure to the low pressure in the vulcanizing can 1 becomes a predetermined pressure and is collected in the closed tank steam device 5. In addition, when the amount of steam required by the sealed tank steam device 5 is insufficient, the insufficient amount of steam can be supplied from the steam supply pipe 14.

  When the vulcanization can be performed again with the vulcanizing can 1, first, the switching valve 11, 7, 8, 10, 6 is opened for the waste steam of a predetermined pressure recovered to the closed tank steam device 5. By supplying from the left side of the screw type rotor unit 12, the steam expands while rotating the screw type rotor unit 12, is decompressed, and is supplied to the vulcanization tank 1. Also in this case, the rotational driving force of the screw-type rotor unit 12 rotates the connected generator 13 to generate predetermined power.

  When the steam pressure in the closed tank steam device 5 becomes lower than the steam pressure in the vulcanizing can 1, the switching valves 9, 8, 7, 6 are opened, and the low pressure steam is supplied to the screw rotor. By supplying the screw-type rotor unit 12 from the right side of the unit 12, the screw-type rotor unit 12 is rotationally driven by the electric motor, and the low-pressure steam is compressed to a predetermined pressure and supplied to the vulcanizing can 1. The In this way, the waste steam recovered from the vulcanization can 1 to the closed tank steam device 5 is supplied again to the vulcanization can 1 so that the waste steam is effectively reused.

  When the steam required by the vulcanizing can 1 can no longer be supplied from the closed tank steam device 5, vulcanization is continued by supplying the required steam from the heated steam supply pipe 2 to the vulcanizing can 1. Can be implemented.

  INDUSTRIAL APPLICABILITY The present invention can be used as a waste steam recovery device in various steam using devices that intermittently use a large amount of steam.

DESCRIPTION OF SYMBOLS 1 Vulcanization can 2 Heating steam supply pipe 3 Steam pipe 4 Steam compression and expansion machine 5 Sealed tank-like steam device 6, 7, 8, 9, 10, 11 Switching valve 12 Screw-type rotor part 13 Generator

Claims (1)

A switch valve that discharges waste steam flowing down from a steam device through a steam pipe to a predetermined location, and arranges a steam compression and expansion machine in the steam pipe and switches between compression and expansion of the steam compression and expansion machine. And the steam compression and expansion machine is connected to a generator and a closed tank steam device.

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