JP2014009846A - Condensate recovery apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a condensate recovery apparatus capable of preventing clogging in a strainer.SOLUTION: An inlet port 3 and a reduction port 11 for condensate, and a loading port 17 and a circulation port 19 for high-pressure operation fluid are respectively disposed in a condensate storage container 2. A condensate inflow pipe 7 is coupled to the inlet port 3 for condensate with a strainer 4 interposed therebetween. A condensate pressure feed pipe 13 is coupled to the reduction port 11 for condensate. The condensate pressure feed pipe 13 is coupled to a backwash port 14 of the strainer 4 with a pressure feed pipe passage 15 interposed therebetween. When the condensate is discharged from the reduction port 11 for condensate to the condensate pressure feed pipe 13, part of the condensate flows back from a filtering part 10 to an inlet 8 and to the condensate inflow pipe 7 through the pressure feed pipe passage 15 and the backwash port 14, thereby backwashing the filtering part 10.

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.

As a conventional condensate recovery device, for example, to remove the liquid accumulated in the underground pit, connect the inside of the underground pit and the inlet of the liquid pumping member, and connect the ejector to the inlet and circulation port of the liquid pumping member Thus, the liquid collected in the underground pit, which is a lowland, can be recovered to a predetermined recovery destination by the liquid pumping member.

  In this condensate recovery device, a strainer for removing foreign matter such as iron rust and sand particles mixed in the liquid is attached to the inlet side of the liquid inlet, and these foreign matters are mixed inside the liquid pumping member. However, there is a problem that the strainer is clogged in a short time.

JP-A-9-112497

The problem to be solved is to provide a condensate recovery device that can prevent strainer clogging.

The present invention provides a condensate reservoir provided with a condensate inlet and a reducing port, and a float that rises and falls with the water level in the condensate reservoir while forming an inlet and a circulation port for high-pressure operating fluid in the condensate reservoir. In the case where the condensate is pumped and collected by opening and closing the high-pressure operating fluid inlet and the circulation port according to the movement of the float means, the foreign substance is trapped on the inlet side of the condensate inlet. A strainer to be taken is attached, and a backwash line for connecting the backwash port of the strainer and the condensate reduction port is provided.

  The condensate recovery device of the present invention supplies a part of the condensate from the return port to the strainer by connecting the back port of the strainer and the return port of the condensate with a backwash pipe. By doing so, the strainer can be backwashed, and clogging of the strainer can be prevented.

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

In the condensate recovery apparatus of the present invention, a strainer is attached to the inlet side of the inflow port. As this strainer, a conventionally known one can be used, but a so-called Y-type strainer is suitable.

FIG. 1 is a configuration diagram of this embodiment, and includes a condensate reservoir 2 of a liquid pumping device disposed in a pit 1 and a strainer 4 attached to an inlet side of a condensate inlet 3 of the condensate reservoir 2. Condensate recovery device is configured. The condensate 5 in the pit 1 can be recovered from the condensate reservoir 2 to a predetermined recovery destination.

A condensate inflow pipe 7 is connected to the condensate inlet 3 through a check valve 6 and a strainer 4. The check valve 6 has a function of allowing the flow of condensate from the condensate inflow pipe 7 to the condensate reservoir 2 and blocking the flow in the opposite direction.

The strainer 4 is called a so-called Y-type strainer, and the inlet 8 and the outlet 9 are arranged in a straight line, and the wetting portion 10 formed therebetween is mixed into the condensate flowing in from the inlet 8. Foreign matter such as iron rust is removed, and only condensate from which foreign matter has been removed can be supplied from the outlet 9 to the condensate reservoir 2.

A condensate pressure feed pipe 13 is connected to the condensate reduction port 11 via a check valve 12. The check valve 12 has a function of allowing the flow of condensate from the condensate reservoir 2 to the condensate pressure feed pipe 13 side and blocking the flow in the opposite direction. The upper part of the condensate pressure feed pipe 13 is connected to a condensate collection destination (not shown). Therefore, the condensate flowing down to the reducing port 11 and the condensate pressure feed pipe 13 is recovered to a predetermined condensate recovery destination.

The backwash port 14 of the strainer 4 and the condensate pressure feed pipe 13 communicating with the condensate reduction port 11 are connected by a backwash pipe 15. A valve 16 capable of opening and closing the flow path or adjusting the opening degree of the flow path is attached in the middle of the backwash pipe line 15.

A high-pressure driving steam supply pipe 18 is connected to the high-pressure operating fluid inlet 17. Further, a pipe line 20 communicating with the atmosphere is connected to the circulation port 19 for the high-pressure operating fluid.

The condensate reservoir 2 closes the high-pressure operating fluid introduction port 17 and opens the high-pressure operating fluid circulation port 19 when a float (not shown) disposed therein is located in the lower part, and opens the condensate inflow pipe. From 7, the condensate in the pit 1 flows down into the condensate reservoir 2.

When condensate accumulates in the condensate reservoir 2 and a float (not shown) is located at a predetermined upper portion, the high-pressure operating fluid circulation port 19 is closed, while the high-pressure operating fluid introduction port 17 is opened to drive high pressure. By driving the driving steam for pressure feeding from the steam supply pipe 18 into the condensate reservoir 2, the condensate accumulated inside is discharged from the reducing port 11 and the check valve 12 to the condensate pressure feeding pipe 13.

While supplying condensate from the condensate inflow pipe 7 into the condensate reservoir 2, foreign matter such as iron rust mixed in the condensate is scraped off at the scavenging portion 10 of the strainer 4. When the amount of foreign matter accumulated in the squeezing section 10 increases, when the condensate is discharged from the condensate reduction port 11 to the condensate pressure feed pipe 13 by opening the valve 16, The scouring part 10 can be backwashed by flowing back through the pressure feed line 15 and the backwash port 14 from the scouring part 10 to the inlet 8 and the condensate inflow pipe 7.

  When the condensate is pumped and the liquid level in the condensate reservoir 2 is lowered, the inlet 17 of the high-pressure operating fluid is closed again, and the circulation port 19 of the high-pressure operating fluid is opened again, so that the condensate inlet 3 The condensate is caused to flow down into the condensate reservoir 2. By repeating such an operation cycle, the condensate can be recovered to a predetermined recovery destination.

  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 Pit 2 Condensate reservoir 3 Condensate inflow port 4 Strainer 6 Check valve 7 Condensate inflow pipe 8 Inlet 9 Outlet 10 Wetting part 11 Condensate reduction port 12 Check valve 13 Condensate pressure feed tube 14 Backwash port 15 Pressure feed line 16 Valve 17 High-pressure operating fluid inlet 19 High-pressure operating fluid circulation port

Claims (1)

A condensate reservoir provided with a condensate inlet and a reducing port, and a float means that floats and descends with the water level in the condensate reservoir while forming an inlet and a circulation port for the high-pressure operating fluid in the condensate reservoir are provided. In addition, when the condensate is pumped and collected by opening and closing the high-pressure working fluid inlet and circulation ports according to the movement of the float means, a strainer that scrubs foreign matter is attached to the inlet side of the condensate inlet. And a condensate collecting apparatus, comprising a backwash pipe connecting the strainer backwashing port and the condensate reduction port.

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