JP5065138B2 - Condensate pumping device - Google Patents

Description

  The present invention relates to a condensate pumping device that pumps condensate generated in various steam using devices to a boiler or a waste heat utilization site.

  In the conventional condensate pressure feeding device, a float and a switching valve are arranged in a condensate reservoir space inside a sealed container provided with a working steam inlet, a working steam outlet, a pressure condensate inlet and a pressure condensate outlet, The switching valve opens and closes the opening and closing of the working steam inlet and the working steam outlet, and first opens the working steam outlet and closes the working steam inlet, and then condenses the condensate from the condensate condensate inlet to the condensate reservoir space. Then, the working steam discharge port is closed, the working steam introduction port is opened, and the condensate accumulated in the condensate reservoir space is pumped from the condensate discharge port.

The conventional condensate pressure feeding device has a problem in that it cannot effectively utilize the amount of heat held by the working steam supplied to the working steam inlet.
JP-A-9-53794

  The problem to be solved is to provide a condensate pressure feeding device capable of effectively utilizing the amount of heat held by the working steam supplied to the working steam inlet.

  In the present invention, a float and a switching valve are arranged in a condensate reservoir space in a sealed container provided with a working steam inlet, a working steam outlet, a pressure condensate inlet, and a pressure condensate outlet, Switch the opening and closing of the working steam inlet and the working steam outlet with the switching valve, open the working steam outlet first, close the working steam inlet and let the condensate flow into the condensate reservoir space from the pressure condensate inlet, then operate In the condensate pressure feeding device that closes the steam outlet and opens the working steam inlet and pumps the condensate collected in the condensate reservoir space from the pressure condensate outlet, the working steam supply pipe that supplies the working steam to the working steam inlet Connect the first heat exchange member to the working steam supply pipe, connect the working steam discharge pipe for discharging the working steam to the working steam discharge port, and connect the second heat exchange to the working steam discharge pipe. Attach the member A separate fluid and the working steam with first and second heat exchange member is for heat exchange.

  The condensate pressure feeding device of the present invention attaches a heat exchange member to a working steam supply pipe connected to the working steam inlet, and exchanges heat between the working steam and a separate fluid by this heat exchange member. An excellent effect is obtained that the amount of heat held can be effectively utilized.

  In the present invention, a heat exchange member is attached to a working steam supply pipe, and a conventionally known heat exchange member can be used as the heat exchange member. For example, room temperature water and high temperature working steam indirectly exchange heat. Thus, a type of heat exchange member that lowers the temperature of the working steam and raises the temperature of the room temperature water is suitable.

  In the present embodiment, an example of a condensate pumping device that pumps the condensate generated in the heat exchanger 1 for steam and water to a predetermined location by the condensate pumping device 3 through the condensate tank 2 is shown.

  A steam supply pipe 4 and a water supply pipe 5 are attached to the heat exchanger 1 in parallel. Steam supplied from the steam supply pipe 4 and water supplied from the water supply pipe 5 are heat-exchanged in the heat exchanger 1, and hot water whose temperature has risen to a predetermined temperature is transferred from the hot water discharge pipe 6 to a predetermined location. It will be discharged.

  The steam supply pipe 4 is branched and a branch steam supply pipe 7 is connected. The first heat exchange member 8 is attached to the branch steam supply pipe 7, and the lower end is connected to the working steam inlet 13 of the condensate pump 3. The first heat exchange member 8 is connected to the heat exchanger 1 via the water supply pipe 5 on the left side and the second heat exchange member 9 on the right side.

  The branch steam supply pipe 7 between the first heat exchange member 8 and the working steam inlet 13 is further branched, the branch pipe 10 is extended, and the steam trap 11 is attached. The steam trap 11 automatically discharges only the condensate out of the condensate / steam mixed fluid flowing down in the branch steam supply pipe 7 and does not discharge the steam to the outside. It is.

  The upper part of the second heat exchange member 9 and the working steam discharge port 14 of the condensate pump 3 are connected by a working steam discharge pipe 12. The lower part of the second heat exchange member 9 is connected to the condensate tank 2 by a pipe line 15.

A pressure condensate inlet 16 of the condensate pressure feeding device 3 communicates with the condensate tank 2 through a communication pipe 17. The condensate pressure feeding device 3 has a pressure condensate condensate inlet 16 and a pressure condensate discharge port 18, and a high pressure working steam inlet 13 and a working steam discharge port 14. A check valve 19 is provided at the pressure condensate inlet 16. The communication pipe 17 is connected via The check valve 19 allows the liquid to flow from the communication pipe 17 into the condensate pressure feeding device 3 and blocks the opposite liquid flow. Similarly, a condensate pressure feed pipe 21 is connected to the pressure feed condensate discharge port 18 via a check valve 20. The check valve 20 has a function of allowing the liquid to flow from the condensate pressure feeding device 3 to the condensate pressure feeding pipe 21 and blocking the opposite flow.

The condensate pressure feeding device 3 closes the working steam inlet 13 and opens the working steam outlet 14 when the float (not shown) disposed inside is located in the lower part, and condensates from the communication pipe 17. The condensate in the tank 2 is caused to flow down into the condensate pressure feeding device 3 through the check valve 19 and the pressure condensate inlet 16.

When condensate accumulates in the condensate pump 3 and a float (not shown) is positioned at a predetermined upper portion, the working steam discharge port 14 is closed, the working steam introduction port 13 is opened, and the high pressure steam is supplied from the branch steam supply pipe 7. Is fed into the condensate pressure feeding device 3 to pump the condensate accumulated therein to a predetermined location through the pressure feed condensate outlet 18, the check valve 20, and the condensate pressure feed pipe 21.

  When the condensate is pumped and the water level in the condensate pumping device 3 decreases, the working steam inlet 13 is closed again and the working steam discharge port 14 is opened, so that the condensate is introduced into the condensate condensate inlet 16 from the inside. Flow down. By repeating such an operation cycle, the condensate pressure feeding device 3 pressure-feeds the condensate from the communication pipe 17 to a predetermined location.

  A part of the steam supplied from the steam supply pipe 4 and the branched steam supply pipe 7 to the first heat exchange member 8 exchanges heat with the water supplied from the water supply pipe 5 to raise the temperature of the water. A part of the steam deprived of heat by raising the temperature of the water condenses and becomes condensed water, and is discharged from the steam trap 11 to the outside. The remaining steam discharged from the condensate by the steam trap 11 is supplied from the working steam inlet 13 to the condensate pressure feeding device 3.

  The steam discharged from the working steam outlet 14 of the condensate pressure feeding device 3 is heated by the second heat exchange member 9 by further heating the water supplied from the water supply pipe 5. Condensate condensed by heating the water flows down to the condensate tank 2 through the pipe 15.

  The water passing through the water supply pipe 5 is heated at a predetermined temperature by the heat amount of a part of the steam supplied from the branch steam supply pipe 7 to the working steam inlet 13 and the heat quantity of the working steam discharged from the working steam outlet 14. It is possible to raise the temperature up to a maximum, and the amount of heat held by the working steam can be used effectively.

The block diagram which shows the Example of the condensate pressure feeding apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat exchanger 2 Condensate tank 3 Condensate pumping device 4 Steam supply pipe 5 Water supply pipe 6 Hot water discharge pipe 7 Branch steam supply pipe 8 1st heat exchange member 9 2nd heat exchange member 11 Steam trap 12 Working steam Discharge pipe 13 Working steam inlet 14 Working steam discharge 16 Pressure condensate inlet 17 Pressure condensate discharge 21 Condensate pressure feed pipe

Claims (1)

Float and switching valve are arranged in the condensate reservoir space in the closed vessel provided with working steam inlet, working steam outlet, pressure condensate condensate inlet and pressure condensate condensate outlet. Switch between opening and closing the steam inlet and the working steam outlet, first open the working steam outlet, close the working steam inlet, let the condensate flow into the condensate reservoir space from the pressure feed condensate inlet, and then open the working steam outlet In the condensate pressure feeding device that pressurizes the condensate accumulated in the condensate reservoir space by opening the closed working steam introduction port, and connecting the working steam supply pipe for supplying the working steam to the working steam introduction port, The first heat exchange member is attached to the working steam supply pipe, the working steam discharge pipe for discharging the working steam is connected to the working steam discharge port, and the second heat exchange member is attached to the working steam discharge pipe. The first and the second Condensate water pressure feeding apparatus of the of working steam with heat exchange member and a separate fluid, characterized in that the heat exchange.

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