JP5595816B2 - Waste steam recovery device - Google Patents

Description

  The present invention is, for example, waste steam discarded from various steam-using devices such as shrink tunnels, steamers, rubber vulcanizers, etc., and is recovered by exchanging heat so that it can be trapped inside and outside the factory building. It is related with the waste steam recovery device which can eliminate.

  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, a large amount of cooling water must be discharged from the nozzle part of the ejector, and the temperature of the mixed fluid of waste steam and cooling water mixed in the ejector becomes low, and this mixed fluid There was a problem that the usage of was limited.

Japanese Patent Laid-Open No. 2002-5582

  The problem to be solved is to provide a waste steam recovery device that can maintain the temperature of the mixed fluid of waste steam and cooling water at a relatively high temperature.

  According to the present invention, waste steam flowing down from a steam device is discharged to a predetermined location. A heat exchange means and a gas-liquid separator are interposed in a waste steam passage through which the waste steam flows, and 2 as a suction means. A stage jet scrubber is connected, the first stage suction port of the two stage jet scrubber is connected to the liquid outlet of the gas-liquid separator, and the second stage suction port of the two stage jet scrubber is vented. In addition to being connected to the gas outlet of the liquid separator, a mesh member made of a perforated hole for promoting mixing of vapor and liquid is attached to the outlet of the two-stage jet scrubber.

  The waste steam recovery apparatus according to the present invention heat-condenses a part of waste steam by heat exchange means to condense it into condensate, and from the liquid outlet of the gas-liquid separator, the first stage suction port of the two-stage jet scrubber Can reduce the amount of waste steam sucked from the gas outlet of the gas-liquid separator to the suction port of the two-stage jet scrubber, and can greatly reduce the amount of cooling water discharged by the jet scrubber. Therefore, the temperature of the mixed fluid of waste steam and cooling water can be kept relatively high.

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

  In the present invention, a two-stage jet scrubber is used, and a conventionally known jet scrubber can be appropriately used.

  In this embodiment, as shown in FIG. 1, a waste steam passage 1, a heat exchange means 2 and a gas-liquid separator 3 connected to the waste steam passage 1, a two-stage jet scrubber 4 as a suction means, and A waste steam recovery apparatus is constituted by the mesh members 16 and 17 attached to the outlet of the two-stage jet scrubber 4.

  The heat exchange means 2 connected to the waste steam passage 1 is composed of a cooling water injection pipe 5 and an in-line mixer 6. A cooling water supply pipe 7 is connected to the cooling water injection pipe 5, and although not shown, a cooling water injection nozzle is attached to the end of the cooling water supply pipe 7 on the cooling water injection pipe 5 side, and the waste steam passage 1. The cooling water is jetted onto the waste steam supplied from the water, and a part of the waste steam is condensed to be condensed water.

 An in-line mixer 6 is connected to the outlet side of the cooling water injection pipe 5. The in-line mixer 6 can promote further mixing of the mixed fluid by causing the mixed fluid of the waste steam and the cooling water supplied from the cooling water injection pipe 5 to flow down spirally.

 The gas-liquid separator 3 is connected to the outlet side of the in-line mixer 6. This gas-liquid separator 3 gas-liquid separates into the vapor | steam as gas and the water as a liquid by making into a swirl | flow the mixed fluid of the vapor | steam supplied from the in-line mixer 6, cooling water, and condensate. It is something that can be done.

 A gas outlet 8 is attached to the right side of the gas-liquid separator 3 to communicate with the second-stage suction port 10 of the two-stage jet scrubber 4, and a liquid outlet 9 is connected to the lower end of the gas-liquid separator 3. It attaches and communicates with the first stage suction port 11 of the two-stage jet scrubber 4.

 The two-stage jet scrubber 4 includes a first-stage jet scrubber 12 and a second-stage jet scrubber 13 arranged in series. A high-pressure water supply pipe 14 is connected to the upper part of the first-stage jet scrubber 12. A hot water discharge pipe 15 is connected to the lower part of the second-stage jet scrubber 13 via a tank 18 and a discharge pump 19.

  A nozzle for the second-stage jet scrubber 13 is attached to the inner central axis of the second-stage jet scrubber 13 at approximately the same height as the suction port 10, but a spiral passage is formed inside the nozzle. By doing so, the flow of the liquid flowing down the second stage jet scrubber 13 becomes a spiral state, and the mixing of the vapor and the liquid in the second stage jet scrubber 13 can be promoted.

  Disc-shaped mesh members 16 and 17 are attached to the outlet of the second-stage jet scrubber 13. The mesh members 16 and 17 are provided with a large number of through holes (not shown), thereby promoting the mixing of steam and water flowing down in the two-stage jet scrubber 4 and increasing the efficiency of waste heat recovery. Can do.

  A cylindrical tank 18 that temporarily stores a mixed fluid of steam and water is disposed below the two-stage jet scrubber 4. Disc-shaped tank mesh members 20 and 21 are attached to the upper portion of the tank 18. The tank mesh members 20 and 21 are also provided with a large number of through holes, and cooling water sprays 22 and 23 for injecting cooling water obliquely downward are attached to the middle part.

The mixed fluid of steam and water discharged from the two-stage jet scrubber 4 accumulates in the tank 18, and a part of the steam rises in the tank 18, but is cooled while passing through the tank mesh members 20 and 21. The water is condensed by the cooling water sprayed from the water sprays 22 and 23, becomes water, and drops into the tank 18. The water in the tank 18 is supplied from the discharge pump 19 and the hot water discharge pipe 15 to a separate hot water use location.

A part of the waste steam flowing down from the left to the right in the waste steam passage 1 is condensed in the cooling water injection pipe 5 to become condensate, further mixed by the in-line mixer 6, and then separated by the gas-liquid separator 3. The liquid is separated, and the separated condensate and cooling water are sucked from the liquid outlet 9 to the first stage suction port 11, and the water-separated vapor is fed from the gas outlet 8 to the second stage suction port 10. Sucked.

  In this way, the amount of waste steam sucked from the gas outlet 8 of the gas-liquid separator 3 to the second-stage suction port 10 is reduced, and the amount of cooling water as high-pressure water discharged by the jet scrubber 4 is greatly increased. Therefore, the temperature of the mixed fluid of waste steam and cooling water discharged from the hot water discharge pipe 15 can be kept relatively high.

  INDUSTRIAL APPLICATION This invention can be utilized for what collect | recovers waste steam discarded from various steam use apparatuses by heat exchange.

DESCRIPTION OF SYMBOLS 1 Waste steam passage 2 Heat exchange means 3 Gas-liquid separator 4 Two-stage jet scrubber 5 Cooling water injection pipe 6 In-line mixer 8 Gas outlet 9 Liquid outlet 10 Second-stage suction port 11 First-stage suction port 14 High-pressure water Supply pipe 15 Hot water discharge pipes 16 and 17 Mesh member 18 Tank 19 Drain pumps 20 and 21 Mesh members 22 and 23 for tank Cooling water spray

Claims (1)

In what discharges the waste steam flowing down from the steam device to a predetermined place,
A heat exchange means for converting the waste steam into condensate by a vaporization cooling chamber to which cooling water is supplied to a waste steam passage through which the waste steam flows, and the waste steam and the condensate supplied from the heat exchange means the mixed fluid, the water as a vapor and liquid as the gas interposed between the gas-liquid separator for gas-liquid separation, to connect the two-stage jet scrubber as suction means,
A high-pressure water supply pipe is connected to the upper part of the first stage of the two-stage jet scrubber;
The first stage of the suction port of the two-stage jet scrubber connected to the liquid outlet of the gas-liquid separator,
The second-stage suction port of the two-stage jet scrubber with connecting the gas outlet of the gas-liquid separator,
Wherein the outlet portion of the two-stage jet scrubber, the waste vapor recovery apparatus is characterized in that mounting the mesh member made of a penetrating porous to promote mixing of vapor and liquid.

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