JP6006980B2 - 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 unit, an air communication pipe is usually connected to the condensate collection tank, and re-evaporated vapor obtained by re-evaporating the condensate in the condensate collection tank is discharged into the atmosphere from the air communication pipe. Therefore, there is a problem that steam loss, that is, heat loss occurs.

JP 2008-170126 A

The problem to be solved is to provide a condensate recovery device that can reduce steam loss from the condensate collecting tank to the atmosphere, that is, heat loss.

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. The condensate inlet is connected to a heat exchange type condensate assembly in which the condensate is pumped and recovered by opening and closing the inlet and circulation port of the high-pressure operating fluid according to the displacement of the float means. Connected to a tank, a heat exchange cooling water supply pipe is connected to the heat exchange type condensate collection tank, a temperature responsive valve is attached to the cooling water supply pipe, and the heat exchange type condensate collection tank is connected to the atmosphere. A communication pipe is connected, and the temperature detection member of the temperature responsive valve is attached to the atmospheric communication pipe.

  The condensate recovery apparatus of the present invention connects a cooling water supply pipe for heat exchange to a heat exchange type condensate collecting tank, and attaches a temperature responsive valve to the cooling water supply pipe, Connect an air communication pipe, attach a temperature sensing valve temperature detection member to this air communication pipe, and supply a large amount of cooling water from the temperature reaction valve when the temperature of reevaporated steam in the air communication pipe is high By supplying heat to the pipe, the heat of the re-evaporated steam is deprived and condensed, thereby reducing the amount of re-evaporated steam and reducing the steam loss from the heat exchange type condensate collecting tank to the atmosphere, that is, heat loss. Can do.

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

The heat exchange type condensate collecting tank of the condensate recovery apparatus of the present invention uses a heat exchange indirectly conducted by a mixed fluid of condensate and re-evaporated steam flowing into the tank and a coiled cooling water pipe. be able to.

In FIG. 1, a condensate collecting device is constituted by a condensate reservoir 5, a heat exchange type condensate collecting tank 1, and an atmosphere communication pipe 6 disposed in the heat exchange type condensate collecting tank 1.

At the center of the heat exchange type condensate collecting tank 1, an atmosphere communication pipe 6 is provided in the shape of a cylindrical pipe and is open at the upper and lower ends. A cooling fluid pipe 3 in which a copper long pipe is formed in a coil shape is disposed on the outer periphery of the atmosphere communication pipe 6. A cooling water supply pipe 7 is connected to the lower end of the cooling fluid pipe 3, and the upper end is a hot water discharge pipe 8. Connect with. The cooling water supplied from the cooling water supply pipe 7 reaches the discharge pipe 8 through the cooling fluid pipe 3. A temperature responsive valve 13 is attached to the cooling water supply pipe 7. Further, a temperature sensing cylinder 12 as a temperature detection member is attached to the upper end portion of the atmosphere communication pipe 6. By connecting the temperature sensing cylinder 12 and the temperature responsive valve 13 with a capillary tube (not shown), the temperature detected by the temperature sensing cylinder 12 can be transmitted to the temperature responsive valve 13 to open and close the temperature responsive valve 13. Is.

An overflow pipe 9 in an open state at the upper end is disposed below the atmosphere communication pipe 6. The upper end 11 of the overflow pipe 9 is opened at a position higher than the bottom of the atmosphere communication pipe 6 by a predetermined distance.

A condensate inflow pipe 2 is connected to the upper part of the heat exchange type condensate collecting tank 1. The left end of the condensate inflow pipe 2 is connected to the outlet side of the steam using equipment (not shown), and the condensate generated by the steam using equipment flows into the heat exchange type condensate collecting tank 1 from the condensate inflow pipe 2 It is.

  Condensate in the condensate reservoir 10 of the heat exchange condensate collecting tank 1 rises in the atmosphere communication pipe 6 and flows down from the upper end 11 of the overflow pipe 9 to the condensate reservoir 5 installed below.

The condensate reservoir 5 has a condensate inlet 25 and a reducing port 26, and a high-pressure operating fluid inlet 27 and a circulation port 28. The condensate inlet 25 is connected to the lower part of the overflow pipe 9 by a passage 35. Connecting. A check valve 29 that allows only passage of fluid in one direction is attached to the passage 35. This check valve 29 allows passage of fluid from the overflow pipe 9 to the condensate reservoir 5 and prevents passage in the opposite direction.

A condensate recovery pipe 31 is connected to the reduction port 26 of the condensate reservoir 5 via a check valve 30, and a high-pressure steam pipe 32 is connected to the high-pressure operating fluid inlet 27. On the other hand, the high-pressure operating fluid circulation port 28 communicates with a side portion of the heat exchange type condensate collecting tank 1 through a pressure equalizing pipe 33.

The condensate reservoir 5 closes the high-pressure operating fluid inlet 27 and opens the high-pressure operating fluid circulation port 28 when a float (not shown) disposed therein is located in the lower part, and is a heat exchange type. Condensate collected in the lower part of the condensate collecting tank 1 is caused to flow down into the condensate reservoir 5 through the check valve 29 and the inlet 25. When condensate accumulates in the condensate reservoir 5 and a float (not shown) is positioned at a predetermined upper portion, the high-pressure operating fluid discharge port 28 is closed, while the high-pressure operating fluid inlet 27 is opened, The steam for high-pressure pressure feeding into the inside from the steam pipe 32 feeds the condensate accumulated inside to the condensate collection destination through the reduction port 26, the check valve 30 and the condensate collection pipe 31.

  When the condensate is pumped with high-pressure steam and the liquid level in the liquid reservoir 5 decreases, the high-pressure operating fluid inlet 27 is closed again and the circulation port 28 is opened, so that the condensate is discharged from the inlet 25. Flow down to the inside. By repeating such an operation cycle, the condensate reservoir 5 pumps the condensate from the heat exchange type condensate collecting tank 1 to the condensate collection destination.

When the detected temperature value in the atmosphere communication pipe 6 of the heat exchange type condensate collecting tank 1 becomes higher than a predetermined value, the temperature sensing cylinder 12 detects it, opens the temperature responsive valve 13, and cools from the cooling water supply pipe 7. By supplying a large amount of cooling water to the fluid pipe 3, the re-evaporated steam in the heat exchange type condensate collecting tank 1 is reduced, and the re-evaporated steam rising into the atmosphere communication pipe 6 is released into the atmosphere. It is possible to prevent steam loss, that is, heat loss.

  INDUSTRIAL APPLICABILITY The present invention can be used as a condensate recovery device 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.

DESCRIPTION OF SYMBOLS 1 Heat exchange type condensate collecting tank 2 Condensate inflow pipe 3 Cooling fluid pipe 5 Condensate reservoir 6 Atmospheric communication pipe 7 Cooling water supply pipe 9 Overflow pipe 12 Temperature sensing cylinder 13 Temperature responsive valve 25 Inlet 26 Reduction port 27 Inlet 28 Circulation port

Claims (1)

A condensate reservoir provided with a condensate inlet and a reducing port is provided with an inlet and a circulation port for high-pressure operation fluid, and a float means that rises and falls with the water level is disposed. A condensate recovery device that opens and closes the introduction port and the circulation port of the high-pressure operating fluid according to displacement and pumps and recovers condensate,
Connecting the inlet of the condensate and the circulation port of the high-pressure working fluid to a heat exchange condensate collecting tank;
Connecting a cooling water supply pipe for heat exchange to the heat exchange type condensate collecting tank,
A temperature responsive valve is attached to the cooling water supply pipe,
Connect an air communication pipe to the heat exchange type condensate collecting tank,
A temperature detection member for opening and closing the temperature responsive valve is attached to the atmosphere communication pipe,
The temperature responsive valve is detected temperature value of the temperature detection member said atmosphere communicating tube is opened and you detect high Ikoto than a predetermined value, to supply the cooling water from the cooling water supply pipe,
If the float means is located in the lower part, by opening the circulation port and closing said inlet, Ru passed down the condensate accumulated in the lower portion of the heat exchange type condensate collection tank to the condensate water reservoir container , Condensate recovery equipment.

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