JP2013228173A - Condensate recovery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a condensate recovery device capable of recovering steam condensate into a condensate recovery destination such as a boiler, even if solvents such as oil and hexane are mixed in the steam condensate, by separating these foreign objects.SOLUTION: A condensate reservoir 1 is connected with a condensate flowing tube 4 and a condensate discharge tube 5. A lower end part of a flexible tube 8 in the condensate reservoir 1 is connected to a microwave-type liquid level meter 3 via a liquid inlet port 6. An upper end of the microwave-type liquid level meter 3 is mounted with an overflow tube 10. A condensate recovery means 2 is connected to the condensate discharge tube 5. Only steam condensate in which no oil or a solvent is mixed can be recovered to a condensate recovery destination such as a boiler or a water supply tank.

Description

The present invention relates to a condensate recovery device that recovers condensate as condensate of steam generated in steam-using equipment to a predetermined condensate recovery destination such as a boiler or a water supply tank, and in particular, oil, hexane, etc. in the condensate It is related with the condensate collection | recovery apparatus suitable when the solvent of this is mixed.

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 device, even if water-insoluble foreign matter such as oil or solvent is mixed in the condensate, it cannot be separated, and normal steam is generated when these foreign matter is supplied to the boiler. There was a problem that could not be done. In addition, these foreign substances may adhere to the inside of the water supply tank or boiler and cause a failure.

JP 2008-170126 A

  The problem to be solved is a condensate recovery device that can separate these foreign substances and recover the condensate to a condensate recovery destination such as a boiler even if a solvent such as oil or hexane is mixed in the condensate. To provide.

The present invention recovers condensate with a condensate reservoir provided with a condensate inlet and outlet and condensate recovery means connected to the outlet of the condensate reservoir. When a condensate tank is filled with condensate, the condensate recovery means is driven to recover the condensate. To do.

The condensate recovery apparatus of the present invention detects the fact that the condensate reservoir is filled with condensate by connecting the condensate reservoir with a microwave liquid level meter. In other words, only the condensate in which no foreign matter such as oil or solvent is mixed can be recovered by the condensate recovery means.
The microwave liquid level meter can detect the liquid level by measuring the propagation time until the microwave pulse transmitted from the antenna is reflected by the liquid level of the condensate and received by the antenna again as a reflected pulse. It can be done.

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

  The condensate recovery apparatus of the present invention is suitable when foreign substances such as oil and solvent are mixed in the condensate, and this kind of foreign substance is applied to a fluid having a density and dielectric constant lower than that of condensate. Can do.

FIG. 1 is a configuration diagram of this embodiment, and a condensate collecting device is constituted by a condensate reservoir 1, a condensate collecting means 2, and a microwave liquid level meter 3.

A condensate inflow pipe 4 is connected to the upper part of the condensate reservoir 1. The right end of the condensate inflow pipe 4 is connected to a condensate generation location such as a steam using device (not shown). A condensate discharge pipe 5 is connected to the lower part of the condensate reservoir 1 to communicate with the condensate recovery means 2. As the condensate recovery means 2, a pump that combines an ejector and a circulation pump, or a condensate pumping device that pumps condensate with high-pressure steam or compressed air can be used.

A flexible tube 8 is connected to the liquid inlet 6 of the microwave liquid level meter 3 in accordance with the vertical movement of the liquid level 7 of the condensate reservoir 1. A spherical float 9 is attached to the upper end of the flexible tube 8 so that it can follow the vertical movement of the liquid surface 7. The liquid on the liquid surface 7 can preferentially flow into the microwave liquid level meter 3.

An overflow pipe 10 is attached to the upper end of the microwave liquid level meter 3 so that the liquid accumulated in the upper part of the microwave liquid level meter 3 can be discharged preferentially to the outside.

Condensate flows down from the condensate inflow pipe 4 into the condensate reservoir 1 and accumulates. If foreign matter such as oil or solvent is mixed in the condensate, the density of the foreign matter is lower than that of the condensate, so that the liquid reaches the vicinity of the liquid surface 7 and passes through the flexible tube 8 preferentially. It flows into level meter 3. When the inflow of condensate into the condensate reservoir 1 further continues, the condensate then flows into the microwave liquid level meter 3 through the flexible tube 8. Even in the microwave liquid level meter 3, the oil and the solvent are located on the upper surface of the condensate, and are preferentially discharged from the overflow pipe 10 to the outside. It is estimated that the condensate reservoir 1 is also filled with condensate by detecting the state in which the microwave liquid level meter 3 is filled with condensate after the oil and solvent are discharged. it can.

In the state where the condensate reservoir 1 is filled with condensate, the condensate recovery means 2 can be driven to recover the condensate from the condensate discharge pipe 5.

  In this way, only condensate in which no oil or solvent is mixed can be recovered to a condensate recovery destination such as a boiler or a water supply tank.

The microwave liquid level meter 3 can detect the water surface by reflecting on the water surface of the condensate. However, since it does not reflect on the liquid surface such as oil or hexane, it transmits the liquid surface. It cannot be detected.

  The present invention can be used as a condensate recovery apparatus suitable when a solvent such as oil or hexane is mixed in the condensate.

DESCRIPTION OF SYMBOLS 1 Condensate reservoir 2 Condensate collection means 3 Microwave type liquid level meter 4 Condensate inflow pipe 5 Condensate discharge pipe 8 Flexible tube 9 Float 10 Overflow pipe

Claims (1)

In the condensate collecting container, which is provided with a condensate inlet and outlet and a condensate collecting means connected to the outlet of the condensate container, the condensate container is equipped with a microwave liquid level meter. When the condensate tank is detected to be filled with condensate by the microwave liquid level meter, the condensate recovery means is driven to recover the condensate. Condensate recovery device.

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