JPH0320193A - Malfunction detector for steam pipe - Google Patents

Abstract

PURPOSE:To prevent such a possibility that drain continues to flow into a steam service apparatus and occurrence of a water hammer from occurring by installing a drain receiver part being interconnected to a drain outlet of a steam separator and partitioned off by a proportional weir and a steam stopper, respectively. CONSTITUTION:A steam separator 4 separating steam and drain is set up in a steal pipe 3, and a steam outlet 7 and a drain outlet 8 discharging those of steam and drain after separation are installed in this steam separator 4. There is provided a drain receiver part 5 which is interconnected to the drain outlet 8 and partitioned off by a proportional weir 2, and also there is provided a liquid level detecting means consisting of a transparent aperture 6 detecting a liquid level of the drain receiver part 5 and a modulation 9, then a steam trap 10 is installed in the secondary side of the proportion weir. With this constitution, the drain flows into the drain receiver part 5, and a drain quantity proportionate to the liquid level is discharged from the proportional weir 2 by way of the steam trap 10. The drain level is detected by the liquid detecting means of the drain receiver part 5 whereby the drain quantity produced in the steam pipe 3 is grasped, thus an abnormal state in the steam pipe 3 based on this drain quantity can be detected.

Description

[Detailed Description of the Invention] Industrial Application Fields The present invention separates condensate generated in steam pipes from steam, and detects abnormalities in steam pipes by ascertaining the amount of separated condensate.
The present invention also relates to a steam pipe abnormality detection device that detects abnormalities in boilers, steam traps that discharge condensate from steam pipes, and the like.

The steam pipes that supply the steam generated in the boiler to each steam-using device are contaminated with water droplets due to carryover of boiler water and condensate generated due to natural heat radiation. Usually, a steam trap is connected to the steam pipe to automatically discharge the condensate. However, if the steam trap fails to discharge or the amount of carryover increases, a large amount of condensate will get mixed into the steam pipe, causing water hammer and damaging equipment, or the condensate will reach steam-using equipment. This sometimes caused a decrease in the productivity of steam-using equipment.

<Conventional technology> Steam traps are installed at regular intervals in steam pipes to automatically discharge condensate, or steam and water separators are installed on the inlet side of steam-using equipment to force condensate. It is common practice to exclude

Problems to be Solved by the Invention The separation capacity of a steam separator naturally has a limit, and even if drain exceeding the limit flows in due to an abnormality in the steam pipe, the above device will not be able to resolve the abnormal condition. There was a problem in that the condensate could not be detected and continued to flow into steam-using equipment. Factors that cause a large amount of condensate to occur include the above-mentioned carryover and poor discharge of steam traps, as well as poor heat retention of steam pipes.

The technical problem of the present invention is to detect steam pipe abnormalities, such as boiler carryover, steam trap discharge failure, and steam pipe heat retention failure, by ascertaining the amount of separated drain in the steam pipe. This is to prevent condensate that cannot be separated by the separator from continuing to flow into steam-using equipment and from causing water hammer.

<Means for solving the problem> A steam separator for separating steam and condensate is arranged in the steam pipe, a steam outlet and a drain outlet are provided in the steam separator for discharging the steam and condensate after separation, and the condensate is separated from the condensate. A drain reservoir is formed which communicates with the outlet and is divided by a proportional weir, a liquid level detection means is provided for detecting the liquid level in the drain reservoir, and a steam trap is arranged on the secondary side of the proportional weir. .

Effect> By providing the steam trap 8 with a drain reservoir section that communicates with the drain outlet of the steam water separator and is separated by a proportional weir, the drain separated by the steam water separator flows into the drain reservoir section and is separated by a proportional weir. From here, a drain proportional to the liquid level is discharged through a steam trap.

By detecting the liquid level of condensate with the liquid level detection means in the drain reservoir, it is possible to grasp the amount of condensate generated in the steam pipe, and it is possible to detect abnormal conditions in the steam pipe based on the amount of condensate. .

Effects of the invention> Abnormal conditions in steam pipes can be detected, and by correcting carryover, steam trap discharge failure, and steam pipe retention failure, which are the causes of abnormal conditions, it is possible to prevent drains from steam-using equipment. It is possible to prevent water from flowing in, thereby preventing a decrease in the productivity of steam-using equipment, and also preventing water hammer.

In addition, by placing the steam trap on the secondary side of the proportional weir, there is almost no pressure drop between the drain outlet and the drain reservoir and the steam trap. can be accurately grasped.

In addition, the operating state of the boiler and the operating state of the steam trap can also be monitored by the simple means of detecting the amount of separated drain and the liquid level in the drain reservoir.

Embodiment> An embodiment illustrating a specific example of the above technical means will be described. <
See Figures 1 and 2> Equipment that uses steam (not shown) uses the steam generated in boiler 1.
A steam separator 4 is attached to the steam pipe 3 that supplies water to the steam pipe. The steam/water separator 4 is provided with a steam outlet 7 and a drain outlet 8, the steam outlet 7 communicates with steam-using equipment, and the drain outlet 8 communicates with the upper end opening of a drain reservoir 5 divided by a proportional weir 2. do.

The drain reservoir 5 is approximately cylindrical, and has a side wall formed with a see-through window 6 made of heat-resistant tempered glass that allows the liquid level of the drain reservoir 5 to be inspected from the outside. A scale 9 for reading the liquid level is provided along the transparent window 6. In this embodiment, the liquid level detection means is performed using the see-through window 6 and the scale 9, but it goes without saying that other well-known electrode rods, floats, etc. can also be used for detection. The proportional weir 2 (see Fig. 2) has a shape in which the flow rate passing through the weir is proportional to the liquid level (water head), and is wider at the bottom and narrower at the top. A drain reservoir 5 is communicated with a steam trap 10 via a proportional weir 2.

The steam trap 10 has a valve port 31 communicating with an outlet 30.
A hollow float 32 is disposed in a free state facing a valve port 31, and the float 32 floats up and down due to the condensate reaching the steam trap 10, opens and closes the valve port 31, and discharges the condensate.

Reference number @53 is a steam trap for discharging condensate generated in the steam pipe 3.

The steam/water separator 4 has a main body 11 with eight ports 12, a steam outlet 7, and a drain outlet 8, and a cylindrical partition member 20 is attached to communicate with the eight ports 12. An annular space 16 is formed therein. A cone-shaped screen 3 is arranged between the inlet 12 and the annular space 16, and the lower part of the annular space 16 communicates with the upper part of the drain outlet 8. In addition, the annular space 16
communicates with the steam outlet 7 through the central opening of the partition member 20. In the annular space 16, a swirling vane 24 made of an inclined wall is arranged. Further, the lower portion of the partition member 20 is formed with a flared drainage portion 18 that expands outward.

When the mixed fluid of steam and condensate that has flowed in from the eight mouths 12 passes through the annular space 16, its direction is bent by the swirling vanes 24 and the fluid is swirled, and since the moisture has a larger mass than the steam, it is shaken out and spread around the surroundings. The light vapor flows down along the inner wall of the main body to the drain outlet 8 and flows out to the steam outlet 7 through the central opening of the partition member 20.

Drain from the steam pipe 3 is separated from steam by a steam separator 4, and then flows from a drain outlet 8 to a drain reservoir 5. By inspecting the liquid level of the drain accumulated in the drain reservoir 5 through the see-through window 6, the amount of drain mixed into the steam pipe 3 can be grasped, and abnormalities in the steam pipe 3 can be detected.

[Brief explanation of the drawing]

FIG. 1 is a schematic structural diagram of an embodiment of the steam pipe abnormality detection device of the present invention, and FIG. 2 is an end view of the proportional weir in FIG. 1. 1. Boiler 2 3: Steam pipe 4 5. Drain reservoir 6 7 Steam outlet 8 9 Scale 10 12: Inlet 16 20. Partition wall member 24 Proportional weir/water separator transparent window drain outlet loss steam trap annular space swirl vane

Claims (1)

[Claims] 1. A steam separator for separating steam and condensate is arranged in the steam pipe, a steam outlet and a drain outlet are provided in the steam pipe, and a drain reservoir is formed by communicating with the drain outlet and partitioned by a proportional weir. , providing a liquid level detection means for detecting the liquid level of the drain reservoir,
A steam pipe abnormality detection device with a steam trap placed on the secondary side of the proportional weir.