JPS623598Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas and condensate recovery device, and more particularly to a device that simultaneously recovers gas discharged when condensate is recovered from a high-pressure gas pipe.

The seal pot type drain recovery device that has been used in the past fills a container with relatively large depth with water and immerses the drain pipe led out from the gas transport pipe vertically into this water. This is a system in which the height is made larger than the value calculated by converting the pressure inside the gas transport pipe into the height of the water column, thereby sealing the gas inside the gas transport pipe from the atmosphere and discharging the condensate. Although this type of conventional drain recovery device can be easily used when the pressure inside the gas transport pipe is low, it is not practical because the depth of the container must be increased as the pressure inside the pipe increases. is limited.

On the other hand, in recent years, top-pressure power generation has been widely implemented in blast furnaces as an energy-saving measure, and the top exhaust gas pipes of multiple blast furnaces are interconnected and connected to a common turbine to improve energy utilization.
In such cases, appropriate equipment is required to remove condensate from each furnace top exhaust gas pipe.

Furthermore, due to the recent rise in the price of heavy oil, fuel gas is being transported over long distances under high pressure in order to make more effective use of the fuel gas. In such cases, there is currently no drain discharge device that completely removes moisture from the high-pressure fuel gas pipe, which increases the cost of equipment for the fuel gas transport pipe. In the case of a fuel gas transport pipe, the fuel gas discharged at the same time as drain discharge cannot be released into the atmosphere, which makes selection of a drain discharge device difficult. The present invention aims to solve these problems that occur with conventional drain discharge devices.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gas and drain recovery device that can recover high-pressure gas, which is simultaneously discharged from a relatively high-pressure gas transport pipe, without releasing it into the atmosphere.

According to the present invention, the upper end is connected to the high-pressure gas pipe by a pipe equipped with a gas trap, and the low-pressure gas pipe is connected by a pipe equipped with a stopper, and the inside is filled with water to maintain the water surface at a predetermined height. a first seal pot 1 having an upper end lower than the water surface of the first seal pot, a second seal pot 2 installed at a position adjacent to the first seal pot, and having a portion adjacent to the lower end communicating with the first seal pot; A standpipe 3 having a predetermined height is attached to the upper end of the second seal pot, has a lower end communicating with the second seal pot, and has an upper end of the overflow pipe opened at a height equal to the water column corresponding to the pressure in the low pressure gas pipe from the water surface. , and a valve body seated on a seat provided at the upper end of the second seal pot in the standpipe, and a valve rod having a length slightly larger than the distance between the valve seat and the opening at the upper end of the overflow pipe. , a gas and drain recovery device is obtained which comprises a float valve 5 which blocks the drain from flowing out of the second seal pot when a large amount of high pressure gas is released into the first seal pot.

Now, an embodiment of the apparatus of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a conventional seal pot device 30, which is equipped with a deep container 33 into which a drain pipe 32 led out from a gas transport pipe 31 is immersed. If the height H at which the drain pipe 32 is immersed in the water 34 in the container is made larger than the gas pressure P (value indicated by the water column height) in the gas transport pipe 31, the gas can be released into the atmosphere. The drain inside the gas transport pipe 31 can be collected without sealing. 35 is an overflow pipe, and 36 is a drain discharge pipe attached to the seal pot. As previously stated, the conventional seal pot shown in FIG. 1 is unsuitable for high pressure gas transmission lines because of practical limitations on the depth or height of the seal pot.

FIG. 2 shows the device of the present invention. The device 10 of the present invention has an upper end connected to a high pressure gas transport pipe 11 through a pipe 13 and a low pressure gas transport pipe 12 through a pipe 17.
The second seal pot 2 is provided at a position adjacent to the first seal pot and has a portion adjacent to the lower end communicating with the first seal pot 1.
A water supply pipe 18 is connected to the upper end of the first seal pot 1, and constantly supplies water to the seal pot 1 to maintain the water level in the seal pot 1 at a predetermined height. 18V indicates a stop installed on the water supply pipe 18. Piping 1 connecting high pressure gas transport pipe 11 to first seal pot 1
3 is a gas tank located adjacent to the first seal pot 1.
Equipped with trap 15A and restraint on its upstream side = 16
It has A. A bypass pipe 14 is connected to the pipe 13, and the bypass pipe 14 is connected to a gas trap 15B.
It is equipped with A stop 16B is attached to the upstream side of the bypass pipe 14.

An example of gas trap 15A is shown in FIG. The gas trap 15A has an intake port 41 for drain containing gas and a separate drain outlet 42 at the bottom, and a gas outlet 43 at the top.
The casing 20 is connected to the casing 20. A valve holder 22H attached to the bottom inner surface of the casing 20 has a tapered tubular valve seat 22, and a drain discharge pipe 2 that connects the valve seat 22 and a drain discharge port.
7. A connecting rod 24 hanging from the float 26 has its lower end rotatably attached to the bottom of the casing by a pivot pin 44 at a position separated from the valve seat 22 to the left. A link 23, whose left end is rotatably attached to a portion adjacent to the lower end of the connecting rod 24 by a pin 25, extends horizontally and connects the valve seat 2 to the right end.
The valve body 21 is provided with a valve body 21 seated on the valve body 2. Support material 39
is provided with an opening 39a through which the link 23 passes. When the drain accumulates inside the casing 20 and reaches a predetermined level, the float 26 floats up and moves the link 23 in a direction to pull the body 21 away from the seat 22. The drain discharged from the seat 22 opened in this manner is discharged to a desired position through a passage 27 shown by the arrow.

Returning to FIG. 2, the second seal pot 2 is a sealed container having an upper end at a level lower than the water level inside the first seal pot 1, and has a lower end communicating with the first seal pot. A standpipe 3 is attached to the upper end of the second seal pot 2, and the lower end is connected to the opening 2A.
This communicates with the second seal pot 2. The overflow pipe 4 is attached to the standpipe 3 at a position higher than the water level of the first seal pot 1 by the gas pressure in the low pressure pipe 12 (about 600-700 mm in water column).
4A shows the opening of the overflow pipe. The opening 2A bored in the upper end of the second seal pot 2 has:
A seat 7 is provided, and the float valve 5 includes a valve body 6 seated on the seat 7 and a float 8, both of which are connected by a rod 9. The valve rod 9 shall have a length such that the body 6 is seated on the seat 7 when the float 8 is placed at a level slightly higher than the opening 4A of the overflow pipe 4.

A water level gauge 28 is provided in the first sill pot 1 and sends water surface readings to a control center (not shown). A water level gauge 29 is also installed inside the standpipe 3, and when the water level reaches a level higher than the opening 4A, an alarm is issued and a notification is sent to the control center at the same time.

During use, a small amount of water is constantly injected into the first seal pot 1 from the water supply pipe 18 by regulating the 18V control voltage, and correspondingly, a small amount of water is constantly discharged from the overflow pipe of the second seal pot 2. . The drain from the high-pressure pipe 11 is discharged via gas traps 15A and 15B, and then injected into the first seal pot 1, passed through the second seal pot 2, the standpipe 3, and the overflow pipe 4, and then into the pit 40.
is discharged. Gas trap 15 at the same time as drain
The high pressure gas discharged from A and 15B is sent to the low pressure pipe 12.
and is not emitted into the atmosphere. Low pressure pipe 1
The drain in No. 2 is connected to No. 1 as in the case of the device shown in Figure 1.
Collected in seal pot 1. When a large amount of high-pressure gas in the first seal pot 1 is discharged from the gas traps 15A and 15B, the gas pressure pushes down the water level in the first seal pot 1, causing the water level in the standpipe 3 to rise rapidly, causing the float 8 to float up. The body 6 closes the opening 2A of the seat 7 and seals high pressure gas. At the same time, an alarm is issued and the control center is notified. Based on the report, the control center will take necessary measures, such as shutting down 16A, 16B, 19, and 18V, in an effort to resume stable and quiet operations.

As described above, when the apparatus of the present invention is used, the high pressure gas that can be recovered from both high pressure and low pressure gas pipe drains can be recovered without being released into the atmosphere.
Therefore, the device of the present invention is particularly suitable for drain removal operations where release of flammable gases, toxic gases, etc. into the atmosphere is strictly prohibited.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a conventional device, FIG. 2 is a schematic diagram showing a device according to the present invention, and FIG. 3 is a sectional view showing the structure of a gas trap attached to the device shown in FIG. 1...First seal pot, 2...Second seal pot, 3...Stand pipe, 4...Overflow pipe,
5...Float valve, 6...Valve body, 7...Valve seat, 8
... float, 9 ... valve rod, 10 ... device of the present invention, 11 ... high pressure gas pipe, 12 ... low pressure gas pipe,
13... Piping, 14... Bypass pipe, 15A, 1
5B... Gas trap, 16A, 16B... Stop, 17... Piping, 18... Water supply pipe, 19... Stop, 20... Casing, 21... Body, 22
...Location, 23...Link, 24...Connection rod, 2
5... Connection pin, 26... Float, 27... Drain discharge path, 28... Water level gauge, 29... Alarm,
30... Conventional seal pot, 31... Gas transport pipe, 32... Drain pipe, 33... Container, 34...
Water, 35... overflow pipe, 36... discharge pipe, 37... gas, 38... water surface, 39... support material, 40... pit.

Claims (1)

[Scope of utility model registration request] A sealed first seal pot 1 whose upper end is connected to a high-pressure gas pipe by a pipe equipped with a gas trap and to a low-pressure gas pipe by a pipe equipped with a stop valve, and whose interior is filled with water to maintain the water surface at a predetermined height. , a second seal pot 2 having an upper end located at a position lower than the water surface in the first seal pot, attached at a position adjacent to the first seal pot, and having a portion adjacent to the lower end communicating with the first seal pot;
a standpipe 3 having a predetermined height, which is attached to the upper end of the seal pot, has a lower end communicating with the second seal pot, and opens the upper end of the overflow pipe from the water surface to a height equal to the water column corresponding to the pressure in the low-pressure gas pipe; comprising a valve body seated on a valve seat provided at the upper end of the second seal pot within the standpipe, and a valve rod having a length slightly larger than the distance between the valve seat and the opening at the upper end of the overflow pipe;
A gas and drain recovery device comprising a float valve 5 that blocks the drain from flowing out of the second seal pot when a large amount of high pressure gas is released into the first seal pot.