JPH09196304A - Condensation recovery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a condensation recovery device in which the operating cost of a pump can be lowered and a high temperature condensation can be recovered to a recovery side. SOLUTION: A steam using device 1 is connected to a steam supply pipe 2 through an ejector 3. A re-evaporation tank 6 is connected to the outlet side of the steam using device 1 through a steam trap 4. The upper part of the re-evaporation tank 6 is connected to the ejector 3. The lower part of the re- evaporation tank 6 is connected to a jet condenser 15 through a centrifugal pump 13. The outlet of the jet condenser 15 is connected to a steam boiler 28.

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 recovering condensate as condensed water generated in steam-using equipment to a boiler or the like. Condensate generated in equipment using steam is generally discharged through a steam trap. The discharged condensate is usually high-pressure steam condensate, which still has high-temperature heat energy, and the condensate is collected in order to effectively utilize this heat energy.

[0002]

2. Description of the Related Art As a conventional condensate water recovery device, there is, for example, one disclosed in Japanese Patent Publication No. 57-55081. This is one in which an ejector is arranged in the steam supply pipe, and the steam trap on the outlet side of the steam-using equipment and the condensate recovery pump are connected to this ejector. It can be recovered in the closed state.

[0003]

SUMMARY OF THE INVENTION In the above prior art,
Since a so-called combination pump including a pump, an ejector, and a circulation passage is used as the condensate recovery pump, there is a problem that the pump efficiency is relatively low and the operating cost of the pump increases. This means that a certain amount of condensate must be constantly circulated in the ejector and the circulation passage, which increases the operating cost of the pump.

Further, in the above-mentioned conventional apparatus, when the condensate recovery destination such as a boiler is located far away from the steam-using device, high-temperature condensate having high heat energy is recovered to the condensate recovery destination. There was a problem I could not do. This is because even high temperature condensate loses heat energy due to heat dissipation while being pumped to a distant place.

Therefore, an object of the present invention is to obtain a condensate recovery device which can recover high-temperature condensate to a condensate recovery destination and can reduce the operating cost of the pump.

[0006]

[Means for Solving the Problems] A steam supply pipe for supplying steam to a steam-using device is connected, and an ejector is arranged in the steam-supplying pipe so that a part of condensate generated in the steam-using device is discharged by the ejector. In addition to recovering the remaining condensate with a condensate recovery pump to a condensate recovery destination such as a boiler, install a jet condenser between the condensate recovery pump and the condensate recovery destination. It is arranged.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A jet condenser supplies a liquid such as condensate from one inlet and a gas such as steam from the other inlet to directly contact the liquid with the gas for mixing. It is used when hot water is prepared by mixing steam and water. Install this jet condenser between the condensate recovery pump and the condensate recovery destination.
In addition, even if the steam-using device and the condensate recovery destination are far away from each other and the temperature of the condensate recovered falls due to the placement near the condensate recovery destination, the high temperature steam will be generated by the jet condenser. It can be recovered as high-temperature condensate again at the condensate recovery destination by mixing with the condensate.

Since the condensate can be mixed with the high-temperature steam through the jet condenser and recovered to the condensate recovery destination, it is necessary to use a combined pump composed of an ejector, a pump and a circulation passage as the condensate recovery pump. In addition, the condensate can be collected only by a general pressure pump, and since the condensate is not constantly circulated in the circulation passage, the operating cost of the pump can be kept low.

[0009]

Embodiments of the present invention will be described in detail with reference to FIG. A steam supply pipe 2 for supplying steam to the steam using device 1 is connected via an ejector 3, an on-off valve 10 and a control valve 11.
A steam trap 4 and a re-evaporation tank 6 are connected to the outlet side pipe of the steam using device 1 through a steam trap 4 and a pipe 5. Re-evaporation tank 6
The upper part of the suction chamber 9 of the ejector 3 via the pipe 7 and the control valve 8.
Connect with.

The steam supplied from the steam supply pipe 2 to the steam using apparatus 1 passes through the ejector 3 and the opening / closing valve 10 and the control valve 11
Is adjusted to a predetermined steam pressure or temperature. By heating an object to be heat-treated (not shown) in the steam using device 1, the steam is condensed and becomes condensed water. Condensed water passes through the steam trap 4 and reaches the inside of the re-evaporation tank 6, a part of which is re-evaporated to become steam again, is sucked by the ejector 3 through the pipe 7, and is supplied to the steam using device 1 again. Due to this, a part of the condensate is recovered.

From the lower part of the re-evaporation tank 6 is connected via a pipe 12 to a spiral pump 13, and the discharge port of the spiral pump 13 is connected via a check valve 14 to a condensate inlet 16 of a jet condenser 15. The jet condenser 15 is formed of a jet portion 20 including a narrowed portion 18 having a large number of pores 17 formed on the entire circumference and a spreading portion 19, and a steam chamber 21 covering the outer periphery of the jet portion 20. The steam chamber 21 includes a pipe 22 and a control valve 2
Connected to the steam supply pipe 2 at 3.

From the bottom of the re-evaporation tank 6 the centrifugal pump 1
The condensate supplied to the jet condenser 15 by 3 is
It is mixed with the high-pressure steam supplied from the steam chamber 21 and becomes high-temperature condensate, which flows down the spreading portion 19. The volute pump 13 is driven or stopped according to the level of the condensate water level in the re-evaporation tank 6, so that the volute pump 13 is stopped.
Need not be operated continuously.

The end of the expanded portion 19 of the jet condenser 15 is connected to a steam boiler 28 as a steam generator via a pipe 25, a control valve 26 and a check valve 27. The jet condenser 15 is arranged near the steam boiler 28.
The steam boiler 28 is connected to the steam supply pipe 2 via a header 29.

Condensate, which has been heated to a high temperature by being mixed with high-pressure steam in the jet condenser 15, passes through the pipe 25 to the boiler-2.
By being recovered to No. 8, high temperature condensate can be recovered to the boiler 28 as a condensate recovery destination.

[0015]

The present invention has the following effects. Condensate can be mixed with the high temperature steam and recovered through the jet condenser, and even if the condensate is low temperature, it can be recovered as high temperature condensate at the condensate recovery destination. Further, since it is not necessary to use a combined pump including an ejector, a pump and a circulation passage as the condensate recovery pump, it is possible to omit the operation of the pump for constantly circulating the condensate in the circulation passage. Therefore, the operating cost of the pump can be reduced.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional configuration diagram showing an embodiment of a condensate water recovery device of the present invention.

[Explanation of symbols]

 1 Equipment Using Steam 2 Steam Supply Pipe 3 Ejector 6 Re-evaporation Tank 13 Whirlpool Pump 15 Jet Condenser 21 Steam Chamber 28 Steam Boiler

Claims (1)

[Claims] 1. A steam supply pipe for supplying steam to a steam using device is connected, an ejector is arranged in the steam supplying pipe, and a part of condensed water generated in the steam using device is recovered by the ejector. When the remaining condensate is recovered by a condensate recovery pump to a condensate recovery destination such as a boiler, it is necessary to arrange a jet condenser between the condensate recovery pump and the condensate recovery destination. A characteristic condensate recovery device.