JP2876279B2 - Condensate recovery equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a condensate recovery device for feeding condensate generated in a steam-using device to a boiler or a waste heat utilizing device. The condensate condensed by the steam-using device is discharged by a steam trap. This condensate is usually high in temperature and has a lot of heat energy. Has been collected.

[0002]

2. Description of the Related Art A conventional condensate recovery apparatus is disclosed in
-65205. This is done by attaching a level switch to the condensate receiving container and connecting this level switch to an electrically operated valve arranged in the vapor passage to the ejector, so that when a predetermined amount of condensate accumulates in the condensate receiving container, the ejector It is driven to guide the condensate to the recovery destination.

[0003]

The above-mentioned conventional apparatus uses a steam ejector. However, the condensate generated in the steam-using device cannot be sucked, and the condensed water stays in the steam-using device. There was a problem. If the steam usage pressure is low and there is almost no difference from the atmospheric pressure, or if it is not possible to provide a falling section between the steam usage device and the condensate receiving container, the condensate generated by the steam usage device It cannot flow down to the condensate receiving container and stays there.

Further, since the above-mentioned conventional one uses an electric operation valve, there is a problem that its use is restricted in an explosive atmosphere such as a chemical plant.

Therefore, a technical object of the present invention is to make it possible to suck in condensate generated in a steam-using device without using an electric part.

[0006]

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problem is to recover condensate generated in a steam-using device to a boiler or the like.
The condensing outlet side of the steam-using device is connected to the suction port of the steam ejector, the outlet side of the steam ejector is connected to pump means of a fluid pressure type, and the outlet side of the pump means is connected to the condensate recovery destination. A high-pressure fluid pipe is connected to the pump means, and a steam pipe is connected to the steam ejector.

[0007]

The operation of the above technical means is as follows.
Steam is supplied to the steam ejector from the steam pipe, and a suction force is generated at the suction port to suck the condensate generated by the steam-using device. The suctioned condensate flows from the outlet side to a fluid pressure type pump means. A high-pressure fluid pipe is connected to the pump means, and condensate collected inside the pump means is pressure-fed to the condensate recovery destination by the high-pressure fluid.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment showing a specific example of the above technical means will be described (see FIGS. 1 and 2). In the present embodiment, an example will be described in which steam is used as a high-pressure fluid supplied to a fluid pumping type pump means. A steam ejector 1 connected to a condensate discharge pipe 21 of a steam using device 20 via a steam trap 22, a pump means 2 of a fluid pressure feeding type, and a steam pipe 3 for supplying steam to the steam ejector 1. A high-pressure fluid pipe 5 for supplying steam to the pump means 2 also constitutes a condensate recovery device.

The steam ejector 1 comprises a nozzle (not shown) disposed inside the suction port 6 and a diffuser 7 connected to the outlet side. The suction port 6 is connected to the condensate discharge pipe 21. The steam pipe 3 branched from the steam supply pipe 23 is connected to a nozzle to cause the steam to flow down, thereby generating a suction force at the suction port 6. The diffuser 7 is connected to a separator 8 for separating air and water. A low-pressure steam pipe 9 for supplying the separated steam to a separate low-pressure steam-using device (not shown) is provided at the upper part of the separator 8 and a condensate tank 10 for storing the separated condensate at the lower part.
A tube 11 is provided for connection to The condensate tank 10 communicates with the pump means 2 of a fluid pressure type via a pipe 12 and a check valve 13. The outlet of the pump means 2 is connected to a condensate collection destination (not shown) via the pipe 14 and the check valve 15.

FIG. 2 shows a pump means 2 of a fluid pressure type.
The pump means 2 has a lid 32 attached to the main body 31 with bolts (not shown) to form a condensate sump chamber 33 inside. An inflow port 34 for condensate water is formed in the upper part of the main body 31 to communicate with the condensate sump chamber 33, and a return port 35 for reducing the condensate water to a recovery destination is formed in the lower part. The inflow port 34 and the reduction port 35 connect the pipe 12 and the pipe 14 in FIG. 1, respectively. Lid 3
2, an inlet 38 connected to the high-pressure fluid pipe 5 and a high-pressure fluid circulation port 39 (not shown) are formed at the back of the inlet 38. The inlet 38 communicates with the condensate sump chamber 33 via an intake valve 50, and the circulation port 39 communicates with the condensate sump chamber 33 via an exhaust valve 51 (not shown) arranged substantially parallel to the back side of the air supply valve 50. Communicate. Since the intake valve 50 and the exhaust valve 51 are connected to the slide rod 53, when the slide rod 53 is displaced upward, the supply valve 50 is opened, the exhaust valve 51 is closed, and the slide rod 53 is moved downward. When displaced, the air supply valve 50 is closed and the exhaust valve 51 is opened. Slide bar 53
A slide ring 55 for supporting the up-and-down movement of the stoid bar 53 is provided on both sides.

A closed float 56 which rises and falls with the water level is accommodated in the condensate sump chamber 33. A lever 57 is attached to the float 56, and the connecting member 58 and the valve stem 59 of the valve body 60 are pin-connected to the lever 57. Lever 57 is pin 61
, And rotates with the float 56 floating.
An auxiliary lever 64 is connected to the end of the lever 57 via a pin 63. The other end of the auxiliary lever 64 is rotatably attached by a pin 65 attached to the lid 32. Connecting member 5
One end of 8 is connected to the slide bar 53 by a pin 62, and the other end is connected to an auxiliary lever 64 by a pin 66. A coil spring 67 in a compressed state is arranged at the center of the connecting member 58.

When the condensate flows into the condensate chamber 33, the float 56 rises, and the lever 57 rotates about the pin 61. In this case, the pin 66 is displaced downward, and the coil spring 67 is further compressed. When the pin 66 is further displaced downward and is positioned slightly below the position of the pin 62, the compression force of the coil spring 67 acts on the pin 62, and the slide rod 53
At once. When the slide rod 53 is positioned above, the air supply valve 50 is opened, high-pressure steam flows from the high-pressure fluid pipe 5 into the condensate sump chamber 33, and an exhaust valve provided in parallel with the back side of the air supply valve 50. The condensate in the condensate sump chamber 33 is returned to the return port 3 by closing the valve
5 and the pipe 14 are fed to the condensate recovery destination.

When the condensate is collected and the water level in the condensate sump 33 drops, the float 56 descends as shown in FIG.
The supply valve 50 is closed and the exhaust valve 51 is opened to discharge the high-pressure steam in the condensate sump chamber 33 to the outside. When the steam pressure in the condensate storage chamber 33 decreases, the condensate in the condensate tank 10 flows down into the condensate storage chamber 33 through the inflow port 34 and the pipe 12. In this case, the condensate is not discharged from the return port 35 because the valve body 60 is raised to close the passage.

In FIG. 1, the steam supplied from the steam supply pipe 23 to the steam use device 20 performs work and condenses to be condensed. On the other hand, steam is supplied from the steam pipe 3 to the steam ejector 1 to generate a suction force at the suction port 6. The condensate is sucked by the steam ejector 1 through the condensate discharge pipe 21 and the steam trap 22 by this suction force. The condensed water mixed with the steam by the steam ejector 1 reaches the separator 8 where the steam and the condensed water are separated again. It reaches the inside of the tank 10. When the water level in the condensate sump chamber 33 of the pump means 2 is low and the float 56 is descending, the pressure in the condensate sump chamber 33 is almost equal to the atmospheric pressure and has accumulated in the condensate tank 10. The condensate flows down to the pump means 2 via the pipe 12 and the check valve 13. When a predetermined amount of condensed water accumulates in the pump means 2, the float 56 rises and pumps the condensed water to a recovery destination.

[0015]

As described above, according to the present invention, the condensate generated in the steam-using device is sucked without using the electric part by using the steam ejector and the pumping device of the fluid pressure type. can do.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a condensate recovery apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view of a fluid pumping type pump means used in the condensate recovery apparatus of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steam ejector 2 Fluid pumping type pump means 3 Steam pipe 5 High-pressure fluid pipe 6 Suction port 7 Diffuser 10 Condensate tank 20 Steam use device 33 Condensate sump chamber 50 Intake valve 51 Exhaust valve 56 Float

Claims (1)

(57) [Claims] 1. Condensate generated in a steam-using device is boiled
And the like, in which the condensate outlet side of the steam-using device is connected to the suction port of the steam ejector, the outlet side of the steam ejector is connected to pump means of a fluid pressure type, and the outlet side of the pump means Is connected to a condensate collection destination, a high-pressure fluid pipe is connected to the pump means, and a steam pipe is connected to the steam ejector.