JP2006226141A - Condensate pressure feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a condensate pressure feeding device capable of reducing heat radiation of condensate collected in a condensate collection space to reduce loss of quantity of heat of condensate fed by pressure. <P>SOLUTION: This condensate pressure feeding device 1 is constituted by arranging a float 3 and a change-over valve 4 in the condensate collection space 10 in a sealed vessel 2 provided with an operation vapor introduction port 11, an operation vapor discharge port 13, a pressure feeding condensate flow-in port 16, and a pressure feeding condensate discharge port 17, switching opening and closing of the operation vapor introduction port 11 and the operation vapor discharge port 13 by the change-over valve 4 in accordance with elevation and lowering of the float 3, opening the operation vapor discharge port 13 and closing the operation vapor introduction port 11 first to let condensate flow into the condensate collection space 10 from the pressure feeding condensate flow-in port 16, and then closing the operation vapor discharge port 13 and opening the operation vapor introduction port 11 to feed condensate collected in the condensate collection space 10 from the pressure feeding condensate discharge port 17 by pressure. A thermal insulating chamber 6 is provided on an outer side of the condensate collection space 10, one end side of the thermal insulating chamber 6 is communicated with the operation vapor discharge port 13, and a second operation vapor discharge port 9 is provided on the other end side of the thermal insulating chamber 6 and is connected with a drain header. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a condensate pumping device that pumps condensate generated in various steam using devices to a boiler or a waste heat utilization site.

  In the conventional condensate pressure feeding device, a float and a switching valve are arranged in a condensate reservoir space inside a sealed container provided with a working steam inlet, a working steam outlet, a pressure condensate inlet and a pressure condensate outlet, The switching valve opens and closes the opening and closing of the working steam inlet and the working steam outlet, and first opens the working steam outlet and closes the working steam inlet, and then condenses the condensate from the condensate condensate inlet to the condensate reservoir space. Then, the working steam discharge port is closed, the working steam introduction port is opened, and the condensate accumulated in the condensate reservoir space is pumped from the pressure feed condensate discharge port.

The conventional condensate pressure feeding device has a problem that the heat loss of the pressure condensate is large because the condensate accumulated in the condensate reservoir space dissipates heat to the outside air through the sealed container.
JP-A-9-53794

  The problem to be solved is to provide a condensate pumping device that can reduce the heat loss of the condensate by reducing the heat radiation of the condensate collected in the condensate reservoir space.

  In the present invention, a float and a switching valve are arranged in a condensate reservoir space in a sealed container provided with a working steam inlet, a working steam outlet, a pressure condensate inlet, and a pressure condensate outlet, Switch the opening and closing of the working steam inlet and the working steam outlet with the switching valve, open the working steam outlet first, close the working steam inlet and let the condensate flow into the condensate reservoir space from the pressure condensate inlet, then operate In the condensate pressure feeding device that closes the steam outlet and opens the working steam inlet and pumps the condensate collected in the condensate reservoir space from the condensate condensate outlet, a warming chamber is provided outside the condensate reservoir space, The side is connected to the working steam discharge port, the second working steam discharge port is provided on the other end side of the warming chamber, and the second working steam discharge port is connected to the drain header.

  This invention produces the outstanding effect that the calorie | heated condensate calorie | heat amount can be enlarged by heat-retaining the condensate collected in a condensate reservoir space with working steam. In addition, by returning the exhaust vapor to the drain header, an excellent effect that it can be pumped to the condensate pumping destination is produced.

  The condensate pressure-feed device of the present invention is provided with a greenhouse in the outside of the condensate reservoir space, one end of the greenhouse is connected to the working steam outlet, and a second working steam outlet is provided in the other end of the greenhouse. Since the second working steam discharge port is connected to the drain header, the condensate reservoir space is kept warm by the working steam discharged from the working steam discharge port to the second working steam discharge port through the thermal insulation, and is collected in the condensate storage space. The heat release from the condensate can be reduced. Further, the exhaust steam used to keep the condensate reservoir space warm is returned to the drain header from the second working steam discharge port and is pumped to the condensate pressure destination.

  An embodiment showing a specific example of the above technical means will be described. FIG. 1 is a sectional view of a condensate pumping apparatus according to an embodiment of the present invention. The condensate pressure feeding device 1 according to this embodiment is configured such that a float 3, a switching valve 4, and a snap mechanism 5 are arranged in a condensate reservoir space 10 in an airtight container 2. The sealed container 2 has a main body portion 7 and a lid portion 8 connected by screws (not shown), and a condensate reservoir space 10 is formed inside. The lid 8 is provided with a working steam introduction port 11, a working steam discharge port 13, a pressure condensate inflow port 16, a pressure condensate condensate discharge port 17, and a part of the warming chamber 6. A part and a second working steam outlet 9 are provided. The greenhouse 6 is provided outside the condensate storage space 10, the working steam outlet 13 communicates with one end of the upper part of the warmer 6, and the second working steam outlet 9 is located at the other end of the lower part of the greenhouse 6. Is provided. A throttle valve 12 and a steam trap 14 are connected to the second working steam outlet 9. The throttle valve 12 and the steam trap 14 are each connected to a drain header.

  An intake valve 20 is attached inside the working steam inlet 11, and an exhaust valve 21 is attached inside the working steam outlet 13. The air supply valve 20 includes a valve case 22, a valve body 23, and an elevating rod 24. The valve case 22 has a through hole in the axial direction, and the upper end surface of the through hole functions as the valve seat 25. The valve body 23 is spherical and is integrally attached to the upper end of the lifting rod 24. The lifting / lowering rod 24 passes through the through hole of the valve case 22 to the closed container 2 side and comes into contact with the connecting plate 27.

  The exhaust valve 21 includes a valve case 29, a valve body 30, and an elevating rod 31. The valve case 29 has a through-hole in the axial direction, and a valve seat 32 is provided inside the through-hole. Is what you do. The lower end of the elevating rod 31 is fixed to the valve shaft operating rod 28, and the connecting plate 27 is fixed to the valve shaft operating rod 28. The switching valve 4 is constituted by the supply valve 20 and the exhaust valve 21, and the exhaust valve 21 is closed when the supply valve 20 is opened, and the exhaust valve 21 is opened when the supply valve 20 is closed.

  The float 3 is supported by a bracket 36 via a lever 34 and a shaft 35, and the snap mechanism 5 is supported by a bracket 38 via a first shaft 37. The bracket 36 and the bracket 38 are integrally attached to the lid portion 8 of the sealed container 2 by screws (not shown). The lever 34 is made by bending a plate into a U shape, and the two plates are opposed in parallel. The float 3 is coupled to the bent portion of the lever 34. A shaft 40 is attached to the other end of the lever 34. The bracket 36 is composed of two L-shaped plates, and is connected by spanning shafts 35, 41, 42. The shaft 35 also serves as the swing shaft of the float 3. The shafts 41 and 42 also serve as upper and lower limit stoppers for the float 3. The bracket 38 is also composed of two L-shaped plates, and the first shaft 37 and the shaft 43 are spanned and connected. The first shaft 37 also serves as the swing axis of the main arm 51. The shaft 43 also serves as a stopper for the sub arm 52.

  The snap mechanism 5 includes a main arm 51, a sub arm 52, a compressed coil spring 53, and spring receiving members 54 and 55. The main arm 51 is composed of two plates opposed in parallel, and a groove 57 is provided at the left end of the two plates. The right end of the main arm 51 is rotatably supported by the first shaft 37. The shaft 40 of the lever 34 is fitted in the groove 57 of the main arm 51. Therefore, the main arm 51 follows up and down of the float 3 and swings up and down around the first shaft 37. The right end portion of the main arm 51 is expanded downward, and a second shaft 58 parallel to the first shaft 37 is spanned on the lower end portion thereof, and the spring receiving member 54 is rotatably supported by the second shaft 58. Has been. Further, the upper end portion of the sub arm 52 is rotatably supported on the first shaft 37. The sub arm 52 is composed of two plates opposed in parallel, and each plate has an inverted L shape. A third shaft 59 parallel to the first and second shafts 37 and 58 is stretched over the lower end portion of the sub arm 52, and the spring receiving member 55 is rotatably supported by the third shaft 59. A coil spring 54 in a compressed state is attached between the spring receiving members 54 and 55. A shaft 60 is stretched over the upper left end of the sub arm 52, and the lower end of the valve shaft operating rod 28 is connected. A window 56 is opened in the main arm 51 so as not to hinder the movement of the shaft 60.

  Next, the operation of the condensate pressure feeding device 1 of this embodiment will be described. First, in the external piping of the condensate pump 1, the working steam inlet 11 is connected to a high-pressure steam source, and the second working steam outlet 9 is connected to a disposal site such as a pit via a throttle valve 12. The pressure condensate inlet 16 is connected to a drain header into which condensate generated by a load such as a steam using device flows through a check valve (not shown) that opens from the outside toward the condensate reservoir space 10. The water discharge port 17 is connected to a condensate pumping destination such as a boiler through a check valve (not shown) that opens outward from the condensate reservoir space 10.

  When there is no condensate in the condensate reservoir space 10 of the condensate pumping apparatus 1 of this embodiment, the float 3 is located at the bottom as shown in FIG. At this time, the supply valve 20 in the switching valve 4 is closed and the exhaust valve 21 is opened. Condensate from the drain header flows down from the condensate condensate inlet 16 to the condensate pump 1 and accumulates in the condensate reservoir space 10. When the float 3 rises due to the condensate accumulated in the condensate reservoir 10, the lever 34 rotates clockwise about the shaft 35, the shaft 40 moves downward, and the main arm 51 centers on the first shaft 37. , The second shaft 58, which is a connecting portion with the coil spring 53, moves to the right and approaches the line connecting the first shaft 37 and the third shaft 59, and the coil spring 53 is compressed. Deform. When the float 3 further rises and the second shaft 58 moves to the right of the line connecting the first shaft 37 and the third shaft 59, the coil spring 53 suddenly recovers from the deformation, and the sub arm 52 Rotating clockwise, the third shaft 59 snaps to the left. As a result, the valve shaft operating rod 28 connected to the shaft 60 of the sub arm 52 moves upward, the air supply valve 20 is opened, and the exhaust valve 21 is closed. When the working steam inlet 11 is opened, high-pressure steam is introduced into the condensate reservoir space 10, the internal pressure rises, and the condensate accumulated in the condensate reservoir space 10 is pushed by the steam pressure and is fed into the condensate discharge outlet. 17 is discharged to an external boiler or waste heat utilization device via a check valve (not shown).

  When the condensate is discharged and the water level in the condensate storage space 10 decreases and the float 3 descends, the lever 34 rotates counterclockwise about the shaft 35 and the shaft 40 moves upward, and the main arm 51 moves Rotating clockwise around the first shaft 37, the second shaft 58, which is a connecting portion with the coil spring 53, moves to the left to connect the first shaft 37 and the third shaft 59. When approaching, the coil spring 53 is compressed and deformed. When the float 3 further descends and the second shaft 58 moves to the left of the line connecting the first shaft 37 and the third shaft 59, the coil spring 53 suddenly recovers from deformation, and the sub arm 52 By rotating counterclockwise, the third shaft 59 snaps to the right. As a result, the valve shaft operating rod 28 connected to the shaft 60 of the sub arm 52 moves downward, the air supply valve 20 is closed, and the exhaust valve 21 is opened. When the working steam discharge port 13 is opened, the working steam is introduced into the warming chamber 6 and is gradually discharged from the second working steam discharge port 9 through the throttle valve 12 to the drain header. Further, a part of the working steam that has become condensate is discharged from the steam trap 14 to the drain header. The condensate collected in the condensate reservoir space 10 is kept warm by the working steam that gently flows down the greenhouse.

Sectional drawing of the condensate pressure feeding apparatus of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Condensate pressure feeding apparatus 2 Sealed space 3 Float 4 Switching valve 5 Snap mechanism 7 Main-body part 8 Lid part 9 2nd working steam discharge part 10 Condensate storage space 11 Working steam introduction port 12 Throttle valve 13 Working steam discharge port 16 Pressure condensate flow Inlet 17 Pressure condensate outlet

Claims (1)

Float and switching valve are arranged in the condensate reservoir space in the closed vessel provided with working steam inlet, working steam outlet, pressure condensate condensate inlet and pressure condensate condensate outlet. Switch between opening and closing the steam inlet and the working steam outlet, first open the working steam outlet, close the working steam inlet, let the condensate flow into the condensate reservoir space from the pressure feed condensate inlet, and then open the working steam outlet In the condensate pressure feeding device that opens the closed working steam inlet and pumps the condensate accumulated in the condensate reservoir space from the condensate discharge outlet, a warming chamber is provided outside the condensate reservoir space, and one end of the warming chamber is connected to the working steam. A condensate pumping device, characterized in that a second working steam discharge port is provided on the other end side of the greenhouse, and the second working steam discharge port is connected to a drain header.

Images