KR101444840B1 - Flare line and monitoring system thereof - Google Patents

Abstract

A flare line system and a flare line monitoring system are disclosed. The flare line system according to the present invention comprises a knockout drum for receiving a gas to be incinerated; A gas line connected to the knock-out drum and discharging gas; And a first pressure safety valve interposed in the gas line and opened when the pressure inside the knock-out drum becomes larger than a preset reference value.

Description

Flare line system and flare line monitoring system

The present invention relates to a flare line system and a flare line monitoring system.

In a facility where an environmental pollution problem gas such as an offshore plant production facility is discharged, a flare line for burning gas to be burned is installed.

In the flare line, flare gas to be incinerated is collected from various facilities. The collected gas is not a pure gas, and a gas containing a large amount of impurities and having viscosity is gathered.

To ensure that these flare gases are burned better, the gases to be burned are collected in a knockout drum, the moisture is removed and sent to a flare tip for incineration.

The knock-out drum is installed to separate and remove the liquid on the mist contained in the flare gas, and a vertical or horizontal drum is used.

1, a conventional flare line system is provided with a rupture disc safety device (PSE) to the line of gas discharged from the knock-out drum 10, that is, the gas line connected to the flare tip in the knock- ) 20 were installed.

The flare gas collected from each facility is stored in the knock-out drum 10. When the pressure is increased by the stored gas, that is, when the pressure of the knock-out drum 10 is increased beyond the operating set pressure , The rupture safety device 20 is blown. Here, the rupture disk is used as a disposable consumable.

At the same time, when the bursting plate is blown, the blow down valve 30 is opened by the ESD (Emergency Shutdown) system to discharge the gas in the knock-out drum 10, Lt; / RTI >

However, since the conventional flare line system uses a disposable consumable part rupture plate, there is a disadvantage that the rupture plate safety device 20 must be frequently maintained and maintained every time the rupture plate safety device 20 is blown. There is a limitation that it is not continuously monitored.

As described above, the flare line system is operated in an incomplete state, and if the flare system is damaged due to high pressure, there is a problem that not only human life but also environmental pollution are adversely affected.

The above-described background technology is technical information that the inventor holds for the derivation of the present invention or acquired in the process of deriving the present invention, and can not necessarily be a known technology disclosed to the general public prior to the filing of the present invention.

Korean Patent Laid-Open Publication No. 10-2008-0105165 discloses a burner, a variable flow rate valve connected to the burner to control the gas supply to the burner, an ignition part provided to ignite the gas distributed by the burner producing the flame, And an electronic regulator operatively connected to the variable flow valve, the igniter, and the flame sensor, respectively, wherein the electronic regulator activates the igniter and monitors the flame sensor while monitoring the presence of the gas Discloses an electronic gas regulating device for self-regulating a flow rate and setting a start position for valve operation when a flame is detected in a burner. Korean Patent Laid-Open No. 10-2008-0068349 discloses an over- The compression of the compression spring can be easily adjusted, the guide of the lifting and lowering of the opening and closing part can be easily performed It can have, a simple structure of the pressure relief valve is disclosed that can measure a compression pressure of the compression spring.

Patent Document 1: Korean Patent Publication No. 10-2008-0105165 Patent Document 2: Korean Patent Publication No. 10-2008-0068349

The present invention provides a flare line system that can be operated safely and is easy to maintain, and a flare line monitoring system that can be automatically monitored.

Other objects of the present invention will become readily apparent from the following description.

According to an aspect of the present invention, there is provided a gas turbine comprising: a knockout drum for receiving a gas to be incinerated; A gas line connected to the knock-out drum and discharging gas; A flare line system is provided which includes a first pressure safety valve which is interposed in the gas line and opens when the pressure inside the knock-out drum becomes larger than a preset reference value.

And a second pressure safety valve connected in parallel with the first pressure safety valve.

The second pressure relief valve may be provided to provide an alternative path when the first pressure relief valve is not used.

Further comprising a blow down valve connected in parallel with the pair of pressure relief valves and interposed in the gas line for opening the first pressure relief valve in response to the opening of the first pressure relief valve .

And an ESD system (Emergency Shutdown Systems) operated when the pressure inside the knock-out drum becomes larger than the reference value, and the blowdown valve may be opened by operation of the ESD system.

According to another aspect of the present invention, there is provided a fuel cell system including: a knockout drum for receiving a gas to be incinerated; A gas line connected to the knock-out drum and discharging gas; A pressure safety valve interposed in the gas line and opened when the pressure inside the knock-out drum becomes larger than a preset reference value; There is provided a flare line monitoring system including a leak detector connected in series to the pressure relief valve for sensing the discharge of gas through the pressure relief valve.

The leak detector may include a thermocouple installed in a discharge line of the pressure relief valve.

And an interlock limit switch connected in series to the pressure safety valve for detecting whether the pressure safety valve is operated.

A manual ball valve is installed at the front end and the rear end of the pressure relief valve, respectively, and the interlock limit switches may be installed in the manual ball valve.

An additional pressure safety valve connected in parallel with the pressure safety valve, and an additional interlock limit switch connected in series to the additional pressure safety valve and detecting whether the additional pressure safety valve is operated.

And a controller for receiving a signal from the leak detector, the interlock limit switch, and the additional interlock limit switch to determine whether the pressure inside the knock-out drum is greater than the reference value and the pressure safety valve is activated, It is possible to monitor automatically whether one of the safety valves has been activated.

Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.

According to the embodiment of the present invention, by installing a dual pressure safety valve including one spare in a flare line applied to an offshore plant production facility, it is possible to protect the knockout drum and protect the flare line system It can be operated safely and it is easy to maintain and repair even if one pressure safety valve is broken.

In addition, a leak detector is installed as a K type thermocouple in the flare line and a manual ball valve installed at the front and rear of the PSV (pressure safety valve) By installing switches (interlock limit switches), an automatic flare monitoring system can be built that can automatically detect the operating state of the PSV.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows a P & ID diagram of a flare line system according to the prior art.
2 is a diagram illustrating a P & ID diagram of a flared line system in accordance with an embodiment of the present invention.
3 shows a diagram of an automatic flare monitoring system in accordance with an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

Also, the terms " part, "" unit," " module, "and the like, which are described in the specification, refer to a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software .

It is to be understood that the components of the embodiments described with reference to the drawings are not limited to the embodiments and may be embodied in other embodiments without departing from the spirit of the invention. It is to be understood that although the description is omitted, multiple embodiments may be implemented again in one integrated embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

2 is a diagram illustrating a P & ID diagram of a flare line system in accordance with an embodiment of the present invention. 2, the flare line system 100, the knock-out drum 110, the gas line 120, the pressure relief valves 130 and 132, the blowdown valve 140, the regeneration oil drain line 150, .

The flare line system 100 according to the present embodiment is installed in a line connected from the knockout drum 110 to the flare tip by a conventional rupture plate safety device a dual pressure safety valve 130, 132 is provided instead of a rupture disc safety device.

That is, by configuring the '1 + 1Spare' system with the pressure safety valve, even if a failure occurs after one pressure safety valve 130 is blown, the remaining one pressure relief valve 132 installed can be used, It is possible to solve the conventional frequent maintenance problem and the incompleteness problem of the system.

The flare line system 100 according to the present embodiment basically includes the knockout drum 110, the gas line 120, the regenerated oil drain line 150, and the pressure relief valve 130 installed in the gas line 120. [ ≪ / RTI >

The knock-out drum 110 collects flare gas from various facilities and collects gas to be burned to remove moisture.

The gas discharged from the knock-out drum 110 is sent to the flared tip and incinerated, and the regenerated oil separated from the flare gas is drained through the pump. Here, a pipe through which gas is discharged from a pipe connected to the knock-out drum 110 is referred to as a gas line 120, and a pipe through which liquid separated from a gas is discharged is referred to as a regenerated oil drain line 150.

The flare line system 100 according to the present embodiment is characterized in that a pressure safety valve (PSV) 130 is installed in the middle of the gas line 120 instead of a conventional rupture plate.

Since the flare gas collects from the various equipments in the knock-out drum 110, the pressure inside the drum may suddenly increase in some cases. As the pressure in the drum increases, the drum may be broken and the flare line may not operate.

On the other hand, the knockout drum 110 is preset with a predetermined pressure reference value, and when the pressure in the drum is increased beyond the reference value, the safety device is operated so that the gas in the drum is promptly discharged to the outside.

That is, the flare gas collected from various equipments is stored in the knock-out drum 110. When the pressure in the drum is increased beyond the operating set pressure, in the flare line system 100 according to the present embodiment, ) Is opened (opened).

The pressure relief valve is a valve that is installed in the fluid receptor by a safety valve operated by the elastic pressure of the compression spring. It prevents the damage of the equipment and the side effects of fluid use in case of overpressure exceeding the prescribed pressure from the fluid It is a component that can be.

The pressure relief valve has an internal spring to set the open critical pressure and periodically check whether it is sealed or not by periodic inspection. In addition, even if the valve is opened due to a pressure exceeding a predetermined pressure, the valve can be set again and reused.

The flare line system 100 according to the present embodiment is characterized in that a pair of pressure relief valves 130 and 132 are connected in parallel as shown in FIG. That is, in addition to the first pressure relief valve 130, a second pressure relief valve 132 is further connected in parallel.

The additional pressure relief valve 132 can be used as a spare for the original pressure relief valve 130 by further adding and connecting in parallel one pressure relief valve 132 as described above.

That is, when any one of the pressure relief valves 130 is not used for repair or the like, the extra pressure relief valve 132 can provide an alternative path to the original pressure relief valve 130. [

For example, if one pressure relief valve 130 fails and repairs are required, if only one pressure relief valve is installed, the operation of the entire flare line system 100 is stopped and the pressure relief valve 130 is closed If the redundant pressure relief valve 132 is added in parallel as in the present embodiment, the entire system can be closed by replacing the line where the failed valve is installed and opening the line where the redundant valve is installed to replace the line Only the failed valve can be easily repaired while still operating.

As described above, in the flare line system 100 according to the present embodiment, the pair of pressure safety valves 130 and 132 are installed in parallel to protect the knock-out drum 110, And it is advantageous that it can be done easily.

Meanwhile, in the flare line system 100 according to the present embodiment, when the pressure in the knock-out drum 110 increases beyond the reference value and the pressure relief valve 130 is opened, an ESD (Emergency Shutdown) By opening the blow down valve 140, the knock-out drum 110 is protected, damage to the flare system is prevented, and the problem of human injury and environmental pollution is prevented in advance.

That is, the blow-down valve 140 is installed in the gas line 120 in parallel with the pressure relief valves 130 and 132. When the pressure in the knock-out drum 110 increases beyond the reference value (the pressure relief valve 130) The blowdown valve 140 is opened so that the high pressure gas is discharged to the outside to protect the knockout drum 110.

The blowdown valve is a safety device installed in case of abnormal situation in the main body of the boiler or chemical equipments or the connection piping part. It is used as a manual valve when the high pressure is applied to the equipment such as the chemical equipments, It is a valve for automatically discharging high-pressure gas out of the machine. It can be made by various methods and structures such as self-pressure type, solenoid type, and diaphragm type.

As described above, the blow-down valve 140 installed in the flare line system 100 according to the present embodiment is a safety device for protecting the knock-out drum 110. The blowdown valve 140 is an ESD system operated when an abnormal situation occurs in the system The operation thereof can be controlled by the time.

That is, if the pressure inside the knock-out drum 110 is larger than the reference value, the ESD system controlling the abnormal situation of the entire system may operate. The blowdown valve 140 according to the present embodiment may be operated It is possible to protect the knock-out drum 110 from high pressure.

3 is a diagram illustrating a diagram of an automatic flare monitoring system in accordance with an embodiment of the present invention. Referring to FIG. 3, a flare line system 100, a blowdown valve 140, a flare line monitoring system 200, a leak detector 210, and an interlock limit switch 220 are shown.

The present embodiment relates to a system for automatically monitoring the operational status of the flare line system 100 described above.

The flare line system 100 may include a leak detector 210 and manual ball valve interlock limit switches 220 to allow the flare monitoring system according to the present embodiment to operate automatically. Can be installed.

That is, as described above, the flare line system 100 to be monitored by the monitoring system according to the present embodiment includes a knock-out drum 110 that receives the gas to be incinerated, a gas discharge line 110 that is connected to the knock- , And pressure relief valves (130, 132) interposed in the gas line (120).

The pressure relief valves 130 and 132 are opened when the pressure inside the knock-out drum 110 is greater than the reference value, thereby protecting the knock-out drum 110 from high pressure. Since the pair of pressure safety valves 130 and 132 are connected in parallel, As described above, that is, one valve can function as a spare for the other valve when the other valve provides an alternate path when the valve is not closed.

The monitoring system according to the present embodiment is characterized in that a leak detector 210 is connected in series to the pressure relief valves 130 and 132. [

The leak detector 210 detects whether or not the gas is discharged through the pressure relief valves 130 and 132. The pressure relief valves 130 and 132 are properly operated so that the gas is shut off, It is possible to detect whether or not a part of gas is leaked through the valves 130 and 132.

By installing the leak detector 210 as described above, it is possible to monitor whether the pressure relief valves 130 and 132 are operated without abnormality or a failure occurs in the pressure relief valves 130 and 132 to leak gas.

A thermocouple may be used as the leak detector 210 according to the present embodiment.

A thermocouple (thermocouple) is a device that measures the temperature using the principle that current flows between the two metals when the two temperatures are different when the two types of metals are combined. Platinum, chromium, aluminum, iron, R, S, K, E, J, T type according to the type of metal constituting the thermocouple.

That is, the leak detector 210 according to the present embodiment detects the temperature of the discharge line of the pressure relief valves 130 and 132 to detect whether the gas leaks through the pressure relief valves 130 and 132 can do.

For example, the leakage detector 210 according to the present embodiment may measure the temperature when gas leaks through the pressure relief valves 130 and 132. For example, A K-type thermocouple can be used.

* K-type thermocouples consist of chromel and alumel, and can be used to measure temperatures in the range of -200 degrees Celsius to 1,250 degrees Celsius.

Meanwhile, the monitoring system according to the present embodiment is characterized in that an interlock limit switch 220 is connected in series to the pressure relief valves 130 and 132.

The interlock limit switch 220 serves to detect whether the pressure relief valves 130 and 132 are activated, that is, whether or not the pressure relief valves 130 and 132 are opened in accordance with the pressure increase of the knockout drum 110. [

A manual ball valve is installed at the front end and the rear end of the pressure safety valves 130 and 132. An interlock limit switch 220 is provided at each of the ball valves, I.e., whether it is closed or opened.

When the pressure relief valves 130 and 132 are opened or a pair of the pressure relief valves 130 and 132 are installed in parallel as described above by installing the limit switch in this way, It is possible to monitor which of the pressure relief valves 130 and 132 has been operated.

That is, when the pressure relief valves 130 and 132 are provided in pairs and are connected in parallel, by providing the interlock limit switch 220 to each of the pressure relief valves 130 and 132, 130, 132 are activated.

As described above, the flare line monitoring system 200 according to the present embodiment includes the leakage detector 210 and the interlock limit switch 220 installed in the flare line and receives signals therefrom, thereby protecting the knock-out drum 110 It is determined whether the pressure relief valves 130 and 132 are operated and the pressure relief valves 130 and 132 are operated when the pressure relief valves 130 and 132 are operated properly and the pressure inside the knock- It is possible to automatically monitor which one of the pressure relief valves 130 and 132 is operated or the like.

The flare line system 100 according to the present embodiment has a pair of pressure relief valves 130 and 132 installed in parallel to protect the knock-out drum 110 and solve frequent maintenance and insecurity problems .

The pressure relief valves 130 and 132, the leak detector 210, and the manual ball valve interlock limit switch 220 (not shown) are provided at the front of the flare knockout drum to flare tip line of the flare line system 100, ), Thereby constituting an automatic flare monitoring system.

That is, a pressure relief valve (PSV) was installed in a dual structure to form a "1 + 1Spare" system, a K type thermocouple was installed as a leak detector 210 device in a PSV discharge pipe, An interlock limit switch (220) is installed on the manual ball valve.

Accordingly, the stabilization and maintenance performance of the flare system can be enhanced, the risk of the flare system can be prevented in advance, the damage to the person due to the damage of the flare system can be reduced, the influence on the environment can be prevented, A flare monitoring system can be constructed.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims And changes may be made without departing from the spirit and scope of the invention.

100: flare line system 110: knockout drum
120: gas line 130, 132: pressure safety valve
140: Blowdown valve 150: Regenerated oil drain line
200: Flare line monitoring system
210: leak detector 220: interlock limit switch

Claims (6)

A knockout drum for containing gas to be incinerated;
A gas line connected to the knock-out drum and discharging gas;
A first pressure safety valve interposed in the gas line and opened when the pressure inside the knock-out drum becomes larger than a preset reference value;
A first leak detector coupled in series to the first pressure relief valve and sensing the discharge of gas through the first pressure relief valve;
A second pressure relief valve connected in parallel to the first pressure relief valve to provide an alternative path when the first pressure relief valve is unused;
A second leak detector connected in series to the second pressure relief valve and sensing the discharge of gas through the second pressure relief valve;
Wherein the first pressure relief valve and the second pressure relief valve are connected in parallel with a pair of pressure relief valves and are interposed in the gas line and correspond to the opening of the first pressure relief valve or the second pressure relief valve And a blowdown valve that is opened to allow the gas to exit. The flare line monitoring system includes: The method according to claim 1,
Wherein the first leak detector and the second leak detector each comprise a thermocouple installed in a discharge line of the first pressure relief valve or the second pressure relief valve connected to correspond to each other, . 3. The method of claim 2,
A first interlock limit switch connected in series to correspond to each of the first pressure relief valve and the second pressure relief valve to detect whether the first pressure relief valve and the second pressure relief valve are operated, switch and a second interlock limit switch. The method of claim 3,
Wherein a manual ball valve provided with the first interlock limit switch or the second interlock limit switch corresponding to each of the front end and the rear end of the first pressure safety valve and the second pressure safety valve is provided, Flare line monitoring system. delete The method of claim 3,
Wherein the knockout drum receives signals from the first leak detector, the second leak detector, the first interlock limit switch, and the second interlock limit switch so that the pressure inside the knockout drum becomes larger than the reference value, And whether the second pressure relief valve is actuated.

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