KR20130025083A - Pipe system and method for regykatubg pressure of the same - Google Patents

Abstract

PURPOSE: A pipe system and a pressure control method thereof are provided to compensate the uneven pressure loss of pipes by constantly controlling the internal pressure of the pipes with a pressure control unit instead of an expensive pressure control valve. CONSTITUTION: A pipe system comprises multiple pipes(L1,L2,L3) in which different pressure fluids flow, a mixed suction header(5), and a pressure control unit. The mixed suction header connects the multiple pipes. The pressure control unit is connected to the pipes at the upstream of the mixed suction header and constantly maintains the internal pressure of the pipes. [Reference numerals] (AA) User

Description

PIPE SYSTEM AND METHOD FOR REGYKATUBG PRESSURE OF THE SAME

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping system and a pressure control method thereof, and more particularly, to a piping system and a pressure control method thereof in which a pressure control means is provided in place of an expensive dedicated pressure control valve so that pressure in a plurality of pipes can be constantly adjusted. .

Inflow streams of various fluids having the same pressure range have to be merged into one. In this case, various fluids having the same pressure range are mixed in the mixed header.

When fluid flows with various pressure ranges are combined in the mixing header, pressure imbalance causes pressure waves in the mixing header, making it difficult to control the pressure uniformly.

Therefore, in the conventional piping system, as shown in FIG. 1, each of the pipes L1 to L3 is provided with dedicated pressure regulating valves B1 to B2 and controllers C1 to C3, respectively. By a dedicated pressure regulating valve and a controller, the pressure adjusted by adjusting the pressure of each pipe to the desired pressure at the place of use is supplied to the mixing header 5. The mixing header 5 mixes the pressure supplied from the some pipe L1-L3, and provides it to a use place.

However, the conventional piping system uses expensive pressure regulating valves B1 to B3 and controllers C1 to a plurality of pipes L1 to L3 connected to the point of use to provide a desired pressure at the point of use, for example, 1,6 barg. As each C3) must be installed, it is disadvantageous economically. In addition, in the conventional piping system, even if one of the pressure regulating valves installed in the plurality of pipes fails, the possibility of stopping the operation in the event of a failure cannot be excluded.

SUMMARY OF THE INVENTION An object of the present invention is to provide a piping system and a pressure control method thereof in which pressure control means is provided in place of expensive dedicated pressure control valves so that pressure in a plurality of pipes can be constantly adjusted.

According to an embodiment of the present invention for achieving the above object, a plurality of pipes having a different pressure of the fluid flowing, a mixing header connecting the plurality of pipes, and the plurality of pipes upstream of the mixing header Is connected to each is provided a piping system comprising a pressure regulating means for maintaining a constant pressure in the plurality of pipes.

The pressure regulating means is preferably a tank capable of storing the fluid.

The height of the tank is preferably increased in proportion to the pressure of the mixing header.

In addition, according to another embodiment of the present invention, as a pressure control method of a piping system including a pressure regulating means connected to a plurality of pipes, respectively, to constantly adjust the pressure downstream of the point where the pressure regulating means of the pipe is connected. A pressure control method for a piping system is provided.

According to an embodiment of the present invention, there is an effect of constantly adjusting the pressure in the plurality of pipes by providing a pressure regulating means instead of an expensive dedicated pressure regulating valve. Accordingly, it is possible to compensate for the non-uniform pressure loss of each pipe, it is advantageous in terms of economics by using a tank that can store the fluid as a pressure control means instead of the expensive pressure control valve, the failure of the conventional dedicated pressure control valve The operation stop caused by

1 is a view for explaining a conventional piping system.
2 is a view for explaining a piping system of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a view for explaining a piping system according to an embodiment of the present invention.

Referring to Figure 2 the piping system according to an embodiment of the present invention includes a pressure control means 10 for constantly adjusting the pressure of the pipe.

The pressure regulating means 10 is connected to a plurality of pipes L1 to L3 having different pressures of the fluid flowing therefrom. In this embodiment, three pipes (L1 ~ L3) is shown to be connected to the pressure regulating means 10, but more or less pipes may be connected to the pressure regulating means (10).

The mixing header 5 may connect a plurality of pipes L1 to L3 to supply a fluid having the same pressure to one use destination.

The pressure regulating means 10 utilizes a tank capable of storing the fluid. The fluid may be water or oil. The tank 10 includes an inlet port (not shown) for supplying a fluid and an outlet port (not shown) for discharging the fluid, and according to the height h of the fluid stored in the tank 10, The bottom pressure is variable.

Accordingly, when the pressure in the pipe 10 is greater than the pressure required at the place of use of the tank 10, the fluid in the pipe flows into the tank by an increased pressure to lower the pressure in the pipe, and the pressure flowing in the pipe is required at the place of use. In smaller cases, the pressure in the pipe can be increased through the discharge of the fluid stored in the tank. As such, when the pressure flowing in the pipe is reduced and the fluid is supplied from the tank, the height of the fluid stored in the tank 10 is lowered. When the pressure flowing in the pipe is increased, the fluid in the pipe is introduced into the tank 10 so that The height rises.

The height of the tank 10 also increases in proportion to the pressure of the mixing header 5.

The mixing header 5 mixes the fluid which passed the 1st-3rd piping L1-L3, and supplies it to a use place.

The pressure control method of the piping system having such a configuration will be described.

For example, a pressure of 2 barg from the first system 1 is supplied through the first pipe L1 and a pressure of 1.5 barg from the second system 2 is supplied through the second pipe L2 and the third system ( Assume that a pressure of 1.8 barg from 3) is supplied through the third pipe L3, and the pressure required at the use place is 1.6 barg.

Since the pressure (2 barg) flowing in the first pipe (L1) is greater than the pressure (1.6 barg) required at the point of use, a portion of the fluid in the first pipe (L1) in the tank (10) connected to the first pipe (L1) By flowing in into (10), the pressure in the 1st piping L1 is reduced. At this time, the height of the fluid stored in the tank 10 is raised.

The height of the tank 10 is determined in consideration of the characteristics of the first pipe L1, that is, the pressure loss due to the length of the pipe, the height of the pipe, the valves and the fittings, and the like. do. The pressure of the first pipe L1 flowing at 2 barg at a variable pressure according to the determined height of the tank 10 is reduced to 1.6 barg downstream of the point where the tank 10 is connected. In order to reduce the pressure to 1.6 barg, values such as the length of the first pipe L1, the height of the first pipe L2, etc., which extend from the point where the tank 10 is connected to the mixing header 5 can be determined empirically.

In addition, since the pressure (1.5 barg) flowing through the second pipe (L2) is smaller than the pressure required at the user (1.6 barg), it is possible to compensate the pressure insufficient in the second pipe (L2) by receiving the fluid from the tank (10). have.

Similarly, in the second piping L2, the height of the tank 10 is determined so that the pressure required by the use destination can be adjusted in consideration of the characteristics of the second piping L2. The pressure of the second pipe L2 flowing at 1.5 barg at a variable pressure according to the determined height of the tank 10 is increased to 1.6 barg downstream of the point where the tank 10 is connected. To increase the pressure to 1.6 barg, values such as the length of the second pipe L2, the height of the second pipe L2, etc., which extend from the point where the tank 10 is connected to the mixing header 5 can be determined empirically.

In addition, since the pressure flowing to the third pipe L3 (1.8 barg) is greater than the pressure required at the use place (1.6 barg), a portion of the fluid in the third pipe L3 is removed from the tank 10 connected to the third pipe L3. When supplied, it is reduced to 1.6 barg downstream of the point where the tank 10 of the third pipe L3 is connected. In order to reduce the pressure to 1.6 barg, values such as the length of the third pipe L3, the height of the third pipe L3, etc., which extend from the point at which the tank 10 is connected to the mixing header 5 can be determined empirically.

The mixing header 5 located downstream of the first to third pipes L3 mixes the first to third fluids having the same pressure (1.6 barg) supplied through the first to third pipes L3. Supply to the place of use.

As described above, as the different pressures flowing through the plurality of pipes L1 to L3 are compensated through the tank 10, the cost of installing a conventional expensive dedicated pressure regulating valve and a controller can be reduced. As the pressure is regulated through the tank 10, the number of operation stops caused by the failure of the conventional pressure control valve can be significantly reduced. In addition, it is easy to adjust the pressure uniformly by mixing the same pressure.

The above-described piping system can be applied to a floating offshore structure, so that the pressure downstream of the point where the pressure regulating means of a plurality of pipes having different pressures from each other is connected can be kept constant.

In the present specification, a floating floating structure means a structure including both a storage tank for storing a liquefied gas such as LNG or LPG and an oil storage tank for storing oil, (LNG transport), LNG RV (LNG Regasification Vessel), as well as OIL FPSO, LNG FSRU (Floating Storage and Regasification Unit), as well as LNG FPSO (Floating, Production, Storage and Offloading) .

The invention being thus described, it will be obvious that the same way may be varied in many ways. Such modifications are intended to be within the spirit and scope of the invention as defined by the appended claims.

L1 to L3: First to third pipes 5: Mixing header
10 tank

Claims (4)

A plurality of pipes having different pressures of the flowing fluid;
A mixing header connecting the plurality of pipes,
And pressure adjusting means connected to each of the plurality of pipes on an upstream side of the mixing header to maintain a constant pressure in the plurality of pipes. The method according to claim 1,
The pressure regulating means is a piping system, characterized in that the tank for storing the fluid. The method according to claim 2,
And the height of the tank is increased in proportion to the pressure of the mixing header. Pressure control method of the piping system including a pressure control means that each of the plurality of pipes are connected,
Pressure control method of the piping system, characterized in that to constantly adjust the downstream pressure of the point where the pressure control means of the pipe is connected.

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