JP2011085325A - Condensate recovery device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a condensate recovery device which securely traps foreign matters such as rust included in condensate and directly recovers the condensate to a condensate recovery destination such as a boiler. <P>SOLUTION: A condensate supply pipe 1 is connected to a condensate tank 2. The condensate tank 2 is connected to condensate pressure feed means 3, 4 by condensate inflow pipe lines 11, 12 within the condensate tank 2. Filter members 7, 8 are mounted to the condensate outflow ports 13, 14 of the condensate pressure feed means 3, 4 via condensate recovery pipes 5, 6. Foreign matters are removed from condensate discharged from the condensate pressure feed means 4 by the filter member 8, and foreign matters are removed from condensate discharged from the condensate pressure feed means 3 by the filter member 7. Then, the condensate is pressure-fed to the condensate recovery destination. <P>COPYRIGHT: (C)2011,JPO&INPIT

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 condensate recovery destination such as a boiler.

 A conventional condensate recovery device is composed of a steam trap and a condensate inflow pipe provided on the secondary side or outlet side of the steam-using equipment, a control valve attached to the pressure relief pipe, and a condensate pump attached to the condensate outflow pipe. The control valve attached to the pressure relief pipe is configured to discharge part of the re-evaporated steam of the condensate discharged from the steam trap to the outside of the system. The water pump can recover the high-temperature condensate to a predetermined location.

In the conventional condensate recovery device, if foreign matter such as dust, rust, or scale is mixed in the condensate recovered from the condensate outflow pipe to the condensate recovery destination, the condensate recovery destination such as a boiler is recovered. There was a problem that water could not be collected directly.
Japanese Patent Publication No. 60-42846

  The problem to be solved is to obtain a condensate recovery device that can reliably capture foreign matter such as rust mixed in the condensate and recover the condensate directly to a condensate recovery destination such as a boiler. It is.

  The present invention comprises a condensate tank that temporarily stores condensate generated in steam-using equipment and a condensate pumping means connected to the condensate tank, and a part of the pumped condensate from the condensate pumping means is recovered. In the case of collecting from the water recovery pipe to the condensate recovery destination, a plurality of condensate pumping means are arranged, and a filter member that captures foreign substances in the condensate respectively in the condensate recovery pipes of the multiple condensate pumping means It is attached.

  The present invention captures foreign matters such as rust mixed in the condensate by attaching filter members to the condensate recovery pipes of the plurality of condensate pumping means connected to the condensate tank. Thus, the condensate from which foreign substances have been removed can be directly recovered to a condensate recovery destination such as a boiler.

  As a filter member to be attached to the condensate recovery pipe of the present invention, a punching plate having a large number of fine holes penetrating according to foreign matter mixed in the condensate, a metal laminated filter in which thin metal fibers are laminated, or A conventionally known filter member such as a sintered metal provided with a large number of through pores can be used.

  In FIG. 1, a condensate recovery apparatus is constituted by the condensate supply pipe 1, the condensate tank 2, the condensate pumping means 3, 4, and the filter members 7, 8 attached to the condensate recovery pipes 5, 6. To do.

The condensate supply pipe 1 has a left end connected to a high-temperature condensate generation source such as a steam using device (not shown), and a right end connected to the condensate tank 2. The condensate tank 2 has a sealed cylindrical shape, and condensate inflow conduits 11 and 12 connected to the condensate inflow ports 9 and 10 of the condensate pumping means 3 and 4 are arranged vertically. The upper ends of the condensate inflow pipes 11 and 12 are opened, so that the condensate accumulated in the condensate tank 2 flows from the upper end opening into the condensate pumping means 3 and 4 through the condensate inlets 9 and 10. To do.

Condensate inlets 9 and 10 and condensate outlets 13 and 14, high-pressure operating fluid inlets 15 and 16, and high-pressure operating fluid outlets 17 and 18 are disposed in the condensate pumping means 3 and 4, respectively. Check valves 19 and 20 are attached to the condensate inflow pipelines 11 and 12. The check valves 19 and 20 have a function of allowing the condensate to flow from the condensate tank 2 to the condensate pumping means 3 and 4 but preventing the condensate from passing in the opposite direction.

Check valves 21 and 22 are also attached to the condensate recovery pipes 5 and 6. These check valves 21 and 22 have a function of allowing the condensate to flow from the condensate pumping means 3 and 4 to the filter members 7 and 8 and blocking the flow in the opposite direction.

High-pressure steam supply pipes 23 and 24 are connected to the high-pressure operation fluid introduction ports 15 and 16, respectively, and high-pressure steam discharge pipes 25 and 26 are connected to the high-pressure operation fluid discharge ports 17 and 18, respectively.

The condensate pumping means 3 and 4 close the high-pressure operating fluid inlets 15 and 16 and open the high-pressure operating fluid discharge ports 17 and 18 when a float (not shown) disposed inside is located in the lower part. Thus, the condensate is caused to flow down from the condensate inflow conduits 11 and 12 into the condensate pumping means 3 and 4 through the check valves 19 and 20 and the condensate inlets 9 and 10.

The condensate inflow conduit 11 in the condensate tank 2 opens at the upper end above the conduit 12, so that the condensate in the condensate tank 2 preferentially passes through the condensate inflow conduit 12. It flows into the water pressure feeding means 4.

When condensate preferentially accumulates in the condensate pumping means 4 and a float (not shown) is located at a predetermined upper portion, the high pressure operation fluid discharge port 18 is closed, while the high pressure operation fluid introduction port 16 is opened to increase the pressure. By collecting high pressure pumping steam from the steam supply pipe 24, the condensate collected therein is recovered through the condensate outlet 14, the check valve 22, the filter member 8, and the condensate recovery pipe 6. Pump forward.

Condensate discharged from the condensate outlet 14 passes through the filter member 8 to remove foreign matters such as rust mixed in the condensate and is pumped to the condensate collection destination.

  When the condensate is pumped and the liquid level in the condensate pumping means 4 decreases, the high-pressure operating fluid inlet 16 is closed again, and the high-pressure operating fluid outlet 18 is opened, so that the condensate flows from the condensate inlet 10. Flow down to the inside. Condensate is recovered by repeating such an operating cycle.

  When a filter (not shown) in the filter member 8 becomes clogged with the operation of the condensate pressure feeding means 4, the condensate cannot be discharged from the condensate pressure feeding means 4, and the liquid level in the condensate tank 2 is reduced. Ascending, the condensate flows down from the condensate inflow pipe 11 into the condensate pumping means 3, and the condensate is recovered by repeating the same operation cycle as the condensate pumping means 4 described above. Condensate discharged from the condensate pumping means 3 also passes through the filter member 7 to remove foreign matters. In addition, while the condensate is being collected from the condensate pressure feeding means 3, the filter member 8 of the clogged condensate pressure feeding means 4 is replaced or cleaned, so that the condensate pressure feeding means 4 can return to the condensate pressure feeding means 4 again. Water can be recovered.

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

1 Condensate supply pipe 2 Condensate tank 3, 4
Condensate pumping means 5, 6
Condensate recovery pipe 7, 8 Filter member 9, 10 Condensate inlet 11, 12 Condensate inflow conduit 13, 14 Condensate outlet 15, 16 High pressure operating fluid inlet 17, 18 High pressure operating fluid outlet 23, 24 High pressure steam supply tube

Claims (1)

  It consists of a condensate tank that temporarily stores condensate generated from steam-using equipment and condensate pressure feeding means connected to the condensate tank, and a part of the pressure condensate from the condensate pressure feeding means is taken from the condensate recovery pipe. When collecting to the condensate collection destination, a plurality of condensate pumping means are arranged, and a filter member for trapping foreign substances in the condensate is attached to the condensate recovery pipe of each of the plurality of condensate pumping means. Condensate recovery device.