JP5940338B2 - Condensate recovery device - Google Patents

Description

The present invention relates to a condensate recovery apparatus that recovers condensate as condensate of steam generated in a steam-using device to a predetermined condensate recovery destination such as a boiler or a water supply tank.

 In the conventional condensate recovery device, the condensate outlet side of the steam-using device is connected to the condensate pumping member via the steam trap, the condensate collecting tank, and the check valve, and the high-pressure operation fluid discharge port of the condensate pumping member A pressure control valve is attached to the tube, and heat energy loss can be reduced.

  In this condensate recovery apparatus, there is a problem that if the steam pressure used in the steam-using device is low, the condensate generated in the steam-using device cannot be discharged reliably. This is because the pressure control valve attached to the high-pressure operating fluid discharge port of the condensate pumping member cannot bring the inside of the condensate pumping member into a vacuum state below atmospheric pressure, and the steam pressure used in steam-using equipment If the temperature becomes extremely low, the condensate of the steam-using device cannot be allowed to flow into the condensate recovery device via the check valve.

JP 2008-170126 A

  The problem to be solved is that there is no need to install a check valve and that the condensate can flow into the condensate recovery device even if the steam pressure used in the steam-using equipment becomes extremely low. To provide a condensate recovery device.

The present invention provides a condensate reservoir provided with a condensate inlet and a reducing port, and a float means that rises and falls with the water level while forming an inlet and a circulation port for a high-pressure operating fluid in the condensate reservoir. A check valve is disposed at the inlet of the condensate in which the condensate is pumped and recovered by opening and closing the inlet and the circulation port of the high-pressure operating fluid according to the movement of the float means. Instead, an open / close valve that is closed by the fluid pressure of the high-pressure operating fluid when the high-pressure operating fluid inlet is opened is disposed at the condensate inlet.

  The condensate recovery device of the present invention has an open / close valve that is closed by the fluid pressure of the high-pressure operating fluid when the inlet of the high-pressure operating fluid is opened. Even if the steam pressure is reduced, no pressure loss occurs when the check valve is arranged, and the condensate can be surely flowed into the condensate recovery apparatus.

The block diagram which shows the Example of the condensate collection | recovery apparatus of this invention.

  The condensate recovery apparatus of the present invention uses an on-off valve that closes by the fluid pressure of the high-pressure operating fluid. As this on-off valve, a piston valve or a diaphragm valve that uses a conventionally known high-pressure fluid as an actuator source, or the like Can be used.

FIG. 1 is a block diagram of the present embodiment. A condensate recovery device 2 is composed of a condensate inlet 3 and a reducing port 4, and a high-pressure operating fluid inlet 5 and a circulation port 6. A condensate inflow pipe 8 is connected to the water inlet 3 through an on-off valve 7.

The on-off valve 7 is a piston valve. When the high-pressure operating fluid inlet 5 is opened to the upper piston 9, the high-pressure operating fluid, in this embodiment high-pressure compressed air, is automatically supplied through the pipe 10. On the other hand, the valve is automatically opened when the supply of the high-pressure operating fluid from the inlet 5 is stopped.

A condensate pressure feed pipe 12 is connected to the condensate reduction port 4 via a check valve 11. The check valve 11 has a function of allowing the flow of condensate from the condensate recovery device 2 to the condensate pressure feed pipe 12 side and blocking the flow in the opposite direction.

A high-pressure compressed air supply pipe 13 is connected to the high-pressure operating fluid inlet 5. In addition, the high-pressure operating fluid circulation port 6 is connected to the suction portion 16 of the air ejector 15 via the conduit 14. An air supply pipe 17 is connected to a nozzle (not shown) built in the suction unit 16. A second on-off valve 18 is attached to the air supply pipe 17, and communicates with the piston 19 at the upper part thereof through the pipe line 20 and the vicinity of the high-pressure operating fluid inlet 5. The on-off valve 18 is automatically closed by supplying the high-pressure operating fluid through the pipe line 20 when the high-pressure operating fluid introduction port 5 opens to the piston 19, while the high-pressure operating fluid is supplied from the introduction port 5. The valve opens automatically when is stopped.

The condensate recovery device 2 closes the high-pressure operating fluid introduction port 5 and opens the on-off valves 7 and 18 when a float (not shown) disposed therein is located in the lower part, while the high-pressure operating fluid The circulation port 6 is opened to communicate with the suction part 16 of the air ejector 15, and the condensate flows down from the condensate inflow pipe 8 into the condensate recovery device 2.

When condensate accumulates in the condensate recovery device 2 and a float (not shown) is positioned at a predetermined upper portion, the high-pressure operating fluid circulation port 6 is closed, while the high-pressure operating fluid introduction port 5 is opened to open and close the valve 7. , 18 are closed, and compressed air for pressure feeding is caused to flow into the inside from the high-pressure compressed air supply pipe 13, so that the condensate accumulated therein is reduced to the condensate reduction port 4, the check valve 11, and the condensate pressure feeding pipe. 12 is pumped to a condensate collection destination such as a boiler.

  When the condensate is pumped and the liquid level in the condensate recovery device 2 is lowered, the inlet 5 for the high-pressure operating fluid is closed again, and the circulation port 6 for the high-pressure operating fluid is opened again. The condensate flows down from 3. By repeating such an operation cycle, the condensate is recovered to a predetermined recovery destination.

When the high-pressure operating fluid inlet 5 is opened, the on-off valves 7 and 18 that are closed by the fluid pressure of the high-pressure operating fluid are arranged. Thus, no pressure loss occurs when the check valve is arranged, and the condensate can be surely flowed into the condensate recovery apparatus 2.

  INDUSTRIAL APPLICABILITY The present invention can be used as a condensate recovery apparatus that can reliably recover condensate even when the pressure of steam used in steam-using equipment is low.

2 Condensate recovery device 3 Condensate inlet 4 Condensate reduction port 5 High-pressure operating fluid inlet 6 High-pressure operating fluid circulation port 7 Open / close valve 8 Condensate inlet pipe 12 Condensate pressure feed pipe 13 High-pressure compressed air supply pipe 15 Air ejector 18 Second on-off valve

Claims (1)

A condensate reservoir in which a condensate inlet and a reducing port, a high-pressure working fluid introduction port and a circulation port are provided, and a float that rises and falls with the water level is disposed inside;
A first on- off valve that controls inflow of the condensate into the inlet ;
A second on-off valve that controls the suction of the high-pressure operating fluid from the circulation port ,
The condensate reservoir is recovered by pumping the condensate by opening and closing the inlet and circulation port of the high-pressure operating fluid according to the movement of the float.
The first on- off valve and the second on-off valve are closed by the fluid pressure when the high-pressure operating fluid inlet is opened, and are opened when the supply of the high-pressure operating fluid to the inlet is stopped. Condensate recovery device.

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