JP5367614B2 - Waste steam recovery device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust steam recovery apparatus keeping the temperature of a mixed fluid of exhaust steam and cooling water at a relatively high temperature. <P>SOLUTION: A cooling water injection pipe 5, an in-line mixer 6 and a gas-liquid separator 3 are sequentially connected to an exhaust steam path 1. The liquid outlet port 9 of the gas-liquid separator 3 is connected to the first stage suction port 11 of a two-stage type jet scrubber 4. The gas outlet port 8 of the gas-liquid separator 3 is connected to the second stage suction port 10 of the two-stage type jet scrubber 4. A warm water tank 16 and a warm water circulation pump 23 are connected to the outlet side of the two-stage type jet scrubber 4. Gas is separated from liquid in the gas-liquid separator 3, the separated condensed water and cooling water are sucked into the first stage suction port 11 from the liquid outlet port 9, and the steam separated from water is sucked into the second stage suction port 10 from the gas outlet port 8. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

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. Connect the stage jet scrubber, connect the first stage suction port of the two stage jet scrubber to the liquid outlet of the gas-liquid separator, and connect the second stage suction port of the two stage jet scrubber Connected to the gas outlet of the gas-liquid separator, a hot water tank is connected to the outlet side of the two-stage jet scrubber, and a hot water circulation pump that supplies the hot water in the hot water tank to the inlet side of the two-stage jet scrubber is installed It is a thing.

  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, The warm water tank 16 and the warm water circulation pump 23 constitute a waste steam recovery device.

  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 the 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 outlet side of the second-stage jet scrubber 13.

  The hot water discharge pipe 15 is connected to the lower part of the hot water tank 16. Flat mesh plates 17 and 18 are attached to the lower side of the cylindrical hot water tank 16. The mesh plates 17 and 18 are provided with a large number of small-diameter through holes, and a mixed fluid of condensate supplied from the hot water discharge pipe 15 into the hot water tank 16 and air mixed in the cooling water and the waste steam. Then, heat exchange with the hot water 19 in the hot water tank 16 can be performed efficiently.

  A hot water circulation pump 23 is connected to the left middle part of the hot water tank 16, and the discharge pipe 24 is connected to the high pressure water supply pipe 14 via a valve 25. By driving the hot water circulation pump 23, the hot water in the hot water tank 16 can be used as high-pressure drive water for the jet scrubber 4.

  On the other hand, a hot water pump 20 is connected to the middle right portion of the hot water tank 16 and its discharge pipe 21 is connected to a hot water use location (not shown). An air discharge pipe 22 is connected to the upper surface of the hot water tank 16.

  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 pipe 16 Hot water tank 17, 18 Mesh plate 20 Hot water pump 23 Hot water circulation pump

Claims (1)

In what discharges the waste steam flowing down from the steam device to a predetermined place,
A cooling water injection pipe having a cooling water supply pipe connected to the cooling water injection pipe is attached to a side end of the cooling water injection pipe to inject the cooling water into the waste steam supplied from the waste steam passage. A heat exchange means for condensing part of the waste steam, and a gas-liquid separator for separating the mixed fluid of steam, cooling water, and condensate into steam as a gas and water as a liquid. A two-stage jet scrubber as a suction means is connected to the waste steam passage through which the waste steam flows ,
With connecting first-stage suction port of the two-stage jet scrubber liquid outlet of the gas-liquid separator,
The second-stage suction port of the two-stage jet scrubber connected to the gas outlet of the gas-liquid separator,
A hot water tank is connected to the outlet side of the two-stage jet scrubber,
Waste vapor recovery apparatus is characterized in that attached the hot water circulation pump for supplying the inlet side of the two-stage jet scrubber hot water in the hot water tank.