JPH04236894A - Steam trap device - Google Patents

Abstract

PURPOSE:To rapidly discharge drain through a steam using device and to effectively utilize heat energy of the discharged drain. CONSTITUTION:An ejector 2 is located in a steam feed pipe 1, and the outlet of a steam trap 4 is connected to a gas liquid separating member 5. A separated gas part 15 of the gas liquid separating member 5 is connected to the ejector 2, and a separated liquid part 16 is connected to a pressure reducing means 6.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a steam trap that is attached to steam-using equipment such as a heat exchanger and automatically discharges only condensate without discharging steam. This invention relates to a steam trap device that can be effectively reused.

[0002] In steam-using equipment, condensate generated within the steam-using equipment must be promptly discharged to the outside of the system in order to effectively utilize the heat capacity of the steam. Also,
Although the amount of heat contained in the discharged condensate is small compared to steam, it still has a amount of heat in the form of sensible heat.

0003

2. Description of the Related Art As a conventional steam trap device, a technique disclosed in, for example, Japanese Patent Application Laid-Open No. 63-47595 has been used. This generates a suction force by passing the steam supplied to the steam-using equipment through an ejector, sucking in the condensate and steam generated by the steam-using equipment, and then separating the condensate and steam with a gas-liquid separator. Only the steam that has been removed is sucked into the ejector again and supplied to the steam-using equipment. By forcibly discharging condensate from steam-using equipment using the suction power of the ejector, and supplying a portion of the heat to the steam-using equipment again, the system aims to quickly discharge condensate and effectively utilize thermal energy. be.

0004

[Problems to be Solved by the Invention] In the above-mentioned conventional systems, drain can be discharged quickly, but thermal energy cannot always be used effectively. That is, the drain separated by the gas-liquid separator is directly discharged from the system. Drain does not have large latent heat like steam, but it does have sensible heat that corresponds to its pressure. The higher the pressure of the drain, the more sensible heat it holds, and discharging this amount of heat directly out of the system is thermal energy.
This cannot be said to be an effective use of.

[0005] Therefore, the technical problem of the present invention is to provide a steam trap device that can quickly discharge condensate generated in steam-using equipment and utilize the thermal energy possessed by the condensate as effectively as possible. It is.

[0006]

[Means for Solving the Problems] The structure of the steam trap device of the present invention is as follows. A steam source, an ejector nozzle, a steam device, and a steam trap were connected in sequence, the outlet of the steam trap was connected to a gas-liquid separation member, and the separated gas section of the gas-liquid separation member was connected to the suction chamber of the ejector. In the gas-liquid separating member, the separated liquid portion of the gas-liquid separating member and the pressure reducing means are communicated with each other.

[0007]

[Operation] As the steam passes through the ejector, a suction force is generated, causing the drain generated in the steam equipment to quickly flow from the steam trap outlet into the gas-liquid separation member. Further, by communicating the separated liquid part of the gas-liquid separation member with the pressure reduction means, the degree of pressure reduction in the gas-liquid separation member is further increased by the degree of pressure reduction by the pressure reduction means compared to a case where only the ejector is connected. That is, the pressure difference between the primary side of the steam-using equipment or steam trap and the gas-liquid separation member becomes large. When high-temperature condensate that has sensible heat reaches a low-pressure location, a portion of it re-evaporates and becomes flash steam. The amount of this flash steam increases as the pressure difference increases. Therefore, most of the condensate discharged from the steam trap is re-evaporated into flash steam depending on the degree of pressure reduction generated by the pressure reduction means. The vapor is separated into vapor as a gas and drain as a liquid by the gas-liquid separation member, and the separated vapor is sucked into the ejector again from the separated gas section and supplied to the equipment using the vapor. Most of the condensate is reevaporated and a small amount of condensate remains is suctioned from the separated liquid section by a pressure reducing means and discharged out of the system.

[0008]

[Embodiment] The illustrated embodiment will be explained in detail. In FIG. 1, a steam supply pipe 1 connected to a steam source, an ejector 2,
Steam equipment 3, steam trap 4, and gas-liquid separation member 5
and the pressure reducing means 6 constitute a steam trap device.

The ejector 2 includes a nozzle 10 connected to the steam supply pipe 1, a suction chamber 11 provided on the outer periphery of the nozzle 10,
and a diffuser section 1 that boosts the pressure of supply steam and suction steam.
It consists of 2. The diffuser section 12 is connected to the steam equipment 3, and the suction chamber 11 is connected to the separated gas section 15 of the gas-liquid separation member 5.

The gas-liquid separation member 5 consists of a separated gas section 15 and a separated liquid section 16, and the separated liquid section 16 communicates with the pressure reducing means 6. Although the configuration of the gas-liquid separation member 5 is not shown,
By swirling, colliding, and filtering gas and liquid,
Any structure may be used as long as it can separate gas and liquid.

The pressure reducing means 6 includes a water ejector 20 and a pump 3.
0 is a combination pump, the pump 30 is the tank 31
The suction side is connected to the nozzle 3 of the water ejector 20 and the discharge side is connected to the nozzle 3 of the water ejector 20.
3, the diffuser 34 of the water ejector 20 is connected to the upper space of the tank 31, and the suction chamber 21 of the water ejector 20 and the separated liquid part 16 of the gas-liquid separation member 5 are connected to each other. It communicates with the pipe 22. A cooling water supply valve 36 for supplying cooling water is connected to the tank 31, and a surplus water discharge valve 37 is connected to the discharge side of the pump 30. This pressure reducing means 6
By operating the pump 30, the water in the tank 31 is supplied to the water ejector 20 for suction, and then returned to the tank 31. Further, the degree of reduced pressure that can be generated by the water ejector 20 can be adjusted by the temperature of the water passing through the nozzle 33. In other words, the degree of pressure reduction is at nozzle 3.
This is because the saturation pressure is at the temperature of the water passing through 3.

A steam trap 23 is provided in the communication pipe 22 that communicates the separated liquid section 16 of the gas-liquid separation member 5 with the pressure reducing means 6.
and a bypass valve 26 are provided.

A temperature sensor 27 for detecting the temperature of the object to be heated is attached to the steam equipment 3, and a control valve 28 for controlling the amount of steam to be supplied is attached to the steam supply pipe 1. temperature sensor
27 and the control valve 28, and the valves 26, 36, and 37 are each connected to the control section 29 to enable centralized control.

The steam supplied to the steam equipment 3 via the control valve 28 heats the object to be heated, becomes drain, and flows down to the gas-liquid separation member 5 via the steam trap 4. In the gas-liquid separation member 5, the pressure is significantly lower than that on the primary side of the steam trap 4 due to the ejector 2 and the pressure reducing means 6 provided in the steam supply pipe 1. Therefore, most of the condensate discharged from the steam trap 4 is re-evaporated into flash steam, which is separated into steam and remaining condensate by the gas-liquid separation member 5, and the steam is returned to the ejector 2 from the separated gas section 15. It is sucked and supplied to the steam equipment 3. A small amount of remaining drain passes from the separated liquid section 16 through the communication pipe 22, passes through the steam trap 23 or the bypass valve 26, and is sucked into the pressure reducing means 6. The bypass valve 26 can be used by adjusting its opening especially when it is necessary to rapidly increase the degree of pressure reduction.

The sucked drain reaches a tank 31 from the water ejector 20 and is circulated by a pump 30. The temperature of the circulating water is determined by the cooling water supply valve 36 or the surplus water discharge valve 3.
It can be controlled by controlling the opening and closing of 7.

In this embodiment, as the pressure reducing means 6,
Although an example using a combination pump has been shown, other conventionally known vacuum pumps such as a water ring type vacuum pump can also be used.

[0017]

[Effects of the Invention] The present invention has the following effects. By communicating the pressure reducing means with the gas-liquid separation member, most of the condensate discharged from the steam trap is re-evaporated into flash steam, which is then supplied to the steam equipment from the ejector again, which was previously discarded. Thermal energy of high-temperature drain can be used effectively.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of a steam trap device of the present invention.

[Explanation of symbols] 1 Steam supply pipe 2 Ejector 3 Steam equipment 4 Steam trap 5 Gas-liquid separation member 6 Pressure reduction means 10 Nozzle 15 Separation gas section 16 Separation liquid section 20 Water ejector

Claims (1)

[Claims] Claim 1: A steam source, an ejector nozzle, a steam device, and a steam trap are connected in sequence, an outlet of the steam trap is connected to a gas-liquid separation member, and the separated gas section of the gas-liquid separation member and the ejector are connected in sequence. A steam trap device in which a suction chamber is connected, and the separated liquid part of the gas-liquid separating member and a pressure reducing means are communicated.