KR101480271B1 - Lng regasification plant performance monitoring system and monitoring method - Google Patents

Abstract

Provided is a regasfication plant monitoring system of a floating offshore structure equipped with LNG regasfication equipment. The system comprises a gas metering unit, which collects and stores data about the supply conditions of gasified natural gas; an automatic ship control device, which collects and stores data about the LNG regasfication equipment; and a ship performance monitoring device, which monitors the LNG regasfication conditions in real time, using the data received from the gas metering unit and the automatic ship control device.

Description

TECHNICAL FIELD [0001] The present invention relates to a LNG regeneration plant performance monitoring system and monitoring method,

The present invention relates to a system and method for monitoring the performance of a reboiler of a floating structure with LNG regasification facility, and more particularly, to a system and method for monitoring the performance of a reboiler plant having a LNG regasification facility, And more particularly to a system and method for monitoring data.

The demand for natural gas has increased sharply worldwide, and the production, supply and transport of natural gas is connected to the competitiveness of the nation.

In countries where natural gas is not produced, land pipelines are connected from neighboring countries to import natural gas or import LNG using transport lines. LNG using transport is stored in the liquefied state and stored in the onshore storage. It is regenerated in accordance with the conditions such as pressure, flow rate, and temperature in accordance with the demand of the customer.

However, such onshore LNG storage is suitable for areas with stable LNG demand, but there are economic disadvantages such as high installation costs and maintenance costs when there is temporary or seasonal demand. On the other hand, land-based LNG regasification facilities are at risk of being problematic due to terrorism and natural disasters.

Accordingly, recently, LNG-RV (Korean Patent Application No. 10-2006-0045018, LNG carrier to natural gas supply method from natural gas to LNG carrier and method of supplying natural gas to LNG carrier) LNG FSRU (domestic patent application No. 10-2007-0085870, LNG (LNG)) which supplies LNG regenerated from the sea directly to the demand of the land by using floating structure (100) equipped with storage and regeneration facilities of LNG Floating storage regeneration facilities) are being developed.

LNG-RV is the addition of LNG regeneration function to LNG carrier that can navigate and float on its own. LNG FSRU is supplied LNG from LNG carrier in off-shore area and stores it. Supply.

In the process of supplying gas to such a demand onshore, the vaporized natural gas must have an appropriate amount of gas composition, and the operator must maintain the desired gas supply flow. To measure these gaseous state information, a floating marine structure with LNG regeneration facility has a gas metering system. It also includes the ship's automatic control system (IAS) to monitor and control the rehabilitation facility.

Conventionally, a system for confirming performance data of a ship at one time in real time has not been established. Therefore, in real-time, regeneration gas metering data and data related to the operation of the LNG regeneration plant were required to be confirmed by individual operators, so that there were many inconveniences for real-time detection of the LNG regeneration system.

The present invention has been proposed in order to solve the above problems, and it is an object of the present invention to provide an automatic LNG regeneration system capable of real-time detection and control of data measured by an automatic vessel control apparatus and a gas metering unit of a floating structure, Provide a surveillance system that can be used. That is, the present invention aims at real-time detection and control of the LNG regeneration facility, thereby enabling a more efficient operation of the system, and alleviating unnecessary efforts.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above problems,

A gas metering unit for collecting and storing data on the supply situation of the vaporized natural gas;

An automatic vessel control system for collecting and storing data on LNG regasification facilities; And

And a ship performance monitoring device for monitoring the LNG re-generation status in real time using data received from the gas metering section and the ship automatic control device. System.

The gas metering section further comprises a gas chromatograph electrical unit and a flow computer, wherein the regenerating plant surveillance system of the floating marine structure with the LNG regasification facility is provided.

The ship automatic control system further includes a monitoring unit for inspecting performance of the LNG regeneration facility. The system for monitoring the regasification plant of the floating marine structure equipped with the LNG regeneration facility is provided.

The ship performance monitoring apparatus includes a calculating device for calculating the average, minimum and maximum values of data received from the ship automatic control device, and a calculating device is provided to provide a surveillance plant monitoring system for a floating marine structure equipped with an LNG regeneration facility do.

The ship performance monitoring apparatus further includes a screen display device for displaying data calculated by the computing device and data related to the operation of the ship system, and provides a surveillance plant monitoring system for a floating marine structure having an LNG regeneration facility .

Collecting and storing data on the supply situation of the natural gas vaporized by the gas metering section;

Collecting and storing data on the LNG regasification facility by the ship automatic control device;

And monitoring the LNG regeneration status in real time by the ship performance monitoring apparatus using the data received from the gas metering section and the ship automatic control apparatus. Provides a method to monitor the plant.

Collecting and storing data on the supply situation of the natural gas vaporized by the gas metering section comprises the steps of measuring the constituents of the natural gas using the gas chromatograph electrical unit and measuring the flow rate of the feed gas The method of claim 1, further comprising the step of monitoring the regeneration plant of the floating marine structure.

The step of collecting and storing data on the LNG regeneration facility by the ship automatic control apparatus further includes the step of checking the performance of the LNG regeneration facility by the monitoring unit. Provides plant monitoring method.

Wherein the step of monitoring the LNG regeneration condition includes calculating the average, minimum and maximum values of data received from the ship automatic control device using a computing device. The LNG re- Provides a method for monitoring the regeneration plant of a structure.

Wherein the step of monitoring the LNG regeneration condition further comprises the step of displaying the data calculated by the computing device using the display device and the data related to the operation of the marine system, wherein the floating marine structure with LNG regeneration facility And a re-ignition plant monitoring system of the present invention.

All data related to LNG regasification can be checked in real time by the operator of the regasification facility, which can improve the operation efficiency and safety of the LNG regasification plant. This enables the regasification plant system to perform automatic control and automatic operation in real time.

1 is a block diagram showing the configuration of a rechargeable plant performance monitoring system according to the present invention.
2 is a flowchart of a method of monitoring the performance of the regenerating plant according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the preferred embodiments of the present invention will be described below, but it is needless to say that the technical idea of the present invention is not limited thereto and can be variously modified by those skilled in the art.

In order to monitor the performance of the LNG regeneration plant, the present invention collects data related to the regeneration facility in each ship using the ship automatic control device 100 (IAS), displays the collected data on the screen display device 320 To a real-time monitoring system.

1 is a block diagram showing the configuration of a rechargeable plant performance monitoring system according to the present invention.

1, the regenerating plant monitoring system according to the present embodiment includes a ship automatic control device 100 for collecting and storing data related to an LNG regeneration facility, a gas measuring device A metering unit 200 and a ship performance monitoring apparatus 300 for monitoring the LNG re-generation status.

The ship automatic control device 100 is a device for automatically controlling the LNG re-generation real time operating system. The ship automatic control device 100 can be connected to the BOG compressor, the low pressure pump, the high pressure pump, the seawater pump, and the vaporizer to control the respective operation numbers. It can also collect and store data related to these controls, and can be connected to a communication system to transmit relevant data to a customer on the shore.

The ship automatic control apparatus 100 includes a monitoring unit 110 therein. The monitoring section 110 includes a vaporizer and pump performance monitoring device 112, a fuel use performance monitoring device 114, an energy use performance monitoring device 116, and a line performance monitoring device 118.

The vaporizer and pump performance monitoring device 112 may be coupled to a BOG compressor, a low pressure pump, a high pressure pump, a seawater pump, and a vaporizer to regulate the respective number of operations and to collect and store data related thereto. For example, the carburetor and pump performance monitoring device 112 may measure and store data on the regasification plant operating time and the total amount supplied by actually regenerating the daily LNG regeneration designated amount with respect to the specified amount. In addition, the average, minimum, and maximum values of the total supply flow of natural gas, the natural gas atmosphere vaporized at the vaporizer, the discharge temperature and pressure of the natural gas discharged from the vaporizer, the temperature and pressure of the high-pressure pump pipe and the flow rate of LNG discharged from the high- You can calculate the value and store the data for it. In addition, the operating time and cooling time per high-pressure pump can be measured and data can be stored. The operating time and the waiting time of the vaporizer per vaporizer can be measured and data for the vaporizer can be stored. The operating time per low-pressure pump in the seawater pump and LNG storage tank can be measured and stored data. The temperature of the heated seawater supplied to the vaporizer and the heated seawater discharged from the vaporizer can be measured and stored data. The mixing amount of BOG and LNG in the suction drum can be measured and the data can be stored.

The fuel use performance monitoring device 114 is a device for collecting and storing data on gas and oil supplied as fuel in the case of LNG regeneration. For example, in the case of an engine using both gas and oil, it is possible to measure the amount of gas and oil supplied and store the data. LNG regasification boilers can also use gas and oil, measure the supply of gas and oil used, and store the data. GCU is a device that burns excess gas. That is, the fuel use performance monitoring device 114 measures the remaining amount of surplus gas to be burned by the GCU and stores data. The fuel usage performance monitor 114 also monitors the fuel and fuel energy required to operate the system, the amount of fuel and fuel energy consumed for BOG management, the ratio of the volume of vaporized natural gas discharged relative to the total fuel amount, Measure the natural gas energy ratio and store the data.

The energy use performance monitoring device 116 is a device for collecting and storing data on electric energy, steam energy and seawater energy supplied when the LNG regeneration is performed. For example, calculate the average, minimum and maximum values of the load during regasification, measure the size of the electric load connected to each natural gas discharge (KW per mmscfd) and store the data. The average, minimum and maximum values of the steam flow rate supplied to the regeneration plant can be calculated, and the steam flow rate (KG / HR per mmscfd) supplied to each natural gas discharge can be calculated and stored. In addition, the energy use performance monitoring device 116 can measure the total energy (KW per mmscfd) of electricity, steam, and seawater for each natural gas discharge and store the data.

The load / unload performance monitoring device 118 is a device capable of collecting and storing data related to the loading / unloading of the LNG. For example, the unloading performance monitoring device 118 may measure and store the stored LNG volume, pressure, and temperature of the LNG storage tank at the start and end of the downline. In addition, the LNG temperature and tank pressure at the time of shipment, the total volume and mass of the natural gas supplied to the LNG supplied, the volume and mass of the returned / delivered steam, the total steam produced per hour, and the excess BOG production during LNG shipment And the LNG shipment rate, the amount of excess BOG production relative to the total steam output, and store the data.

In this way, the data stored in the monitoring unit is sent to the ship performance monitoring apparatus 300 so that the operator of the regeneration plant can monitor in real time.

The gas metering unit 200 is a device for measuring the supply status of the vaporized natural gas. The gas metering unit 200 includes a gas chromatograph electrical unit 210 for measuring and collecting components of the gas, a flow computer 220 for collecting status information of the gas, .

Data related to the LNG regasification collected and stored in the gas metering unit 200 is sent to the marine performance monitoring apparatus 300 for monitoring.

The ship performance monitoring apparatus 300 is an apparatus for an operator to confirm data related to various LNG re-generation facilities at a time in real time. The ship performance monitoring apparatus 300 includes a computing device 310 and a screen display device 320.

The calculation unit calculates the average value, the minimum value, and the maximum value of the data for the LNG regeneration facility measured by the ship automatic control device 100, and provides other calculation values. For example, the average value can be divided into a temporary average value, a daily average value, a weekly average value, and a monthly average value, and a temporary average value is initialized when the equipment is stopped. That is, the daily average value is initialized at the 0:00 of the next day, and the weekly average value is initialized at the end of one week, and the monthly average value is initialized at the month. The average value can be obtained by dividing the value calculated by the corresponding time.

The minimum and maximum values are compared with the current measured value and the stored maximum / minimum values. If the present measured value is larger than the maximum value, the maximum and minimum values are changed.

When calculating the average, maximum and minimum values, the operator can manually exclude and calculate these values if the data contains unneeded values.

In addition, the operation unit can calculate the operation time of each equipment by using the timer function in the ship automatic control device 100. [ The operation time can be divided into the temporary operation time, the daily operation time, the weekly operation time and the monthly operation time, and the temporary operation time data is initialized when the apparatus is stopped. Daily, weekly, and monthly operating hours are initialized at the end of each period. That is, the daily operation time is initialized at the 0:00 of the next day, and the weekly operation time is initialized at the end of one week, and the monthly operation time is initialized at the month. However, these data are stored as Excel data before being initialized.

The operation unit can obtain the sum of the data calculated above by using the adder of the automatic ship control apparatus 100. The totals can be divided into temporary total, daily total, week total and monthly total, and the temporary total data is initialized when the equipment stops. The daily, weekly, and monthly totals are initialized at the end of each period. That is, the daily total is initialized at the 0:00 of the next day, and the weekly total is initialized at the end of one week, and the monthly total is initialized at one month. However, these data are stored as Excel data before being initialized.

The screen display device 320 displays the data collected by the ship automatic control device 100 and the gas metering unit 200 as a screen that the operator can visually identify. The collected data can be displayed as a graphic screen or as data of an excel program. The operator can view all the data related to the LNG regeneration in one screen, so it can be monitored in real time.

2 is a flowchart of a method of monitoring the performance of the regenerating plant according to the present invention. In the monitoring method of the regasification plant, the step of collecting and storing data on the natural gas supply condition vaporized in the gas metering section 200 includes the steps of: And storing it.

The step of collecting and storing data on the LNG regeneration facility by the ship automatic control apparatus 100 collects and stores data on various equipment related to the LNG regeneration facility and transmits the data to the ship performance monitoring apparatus 300 .

Claims (10)

A gas metering unit for collecting and storing data on the supply situation of the vaporized natural gas;
An automatic vessel control system for collecting and storing data on LNG regasification facilities; And
And a ship performance monitoring device for monitoring the LNG re-generation status in real time using data received from the gas metering section and the ship automatic control device,
Wherein said gas metering section comprises a gas chromatograph electrical unit and a flow computer. ≪ Desc / Clms Page number 20 > delete The method according to claim 1,
Wherein the ship automatic control apparatus further comprises a monitoring unit for checking the performance of the LNG regeneration facility. The method according to claim 1,
Wherein the ship performance monitoring apparatus includes an arithmetic unit for calculating an average, a minimum, and a maximum value of data received from the ship automatic control apparatus, and an arithmetic unit. . The method of claim 4,
Wherein the ship performance monitoring apparatus further includes a screen display device for displaying data calculated by the computing device and data related to the operation of the ship system. Collecting and storing data on the supply situation of the natural gas vaporized by the gas metering section;
Collecting and storing data on the LNG regasification facility by the ship automatic control device;
And monitoring the LNG re-generation status in real time by the ship performance monitoring apparatus using the data received from the gas metering unit and the ship automatic control apparatus,
The step of collecting and storing data on the supply situation of the natural gas vaporized by the gas metering section comprises the steps of measuring the constituent components of the natural gas using the gas chromatograph electrical unit, The method comprising the steps of: (a) monitoring the reboiled plant of the floating structure; delete The method of claim 6,
Wherein the step of collecting and storing data on the LNG regeneration facility by the ship automatic control apparatus further comprises the step of checking the performance of the LNG regeneration facility by the monitoring unit. How to monitor the regasification plant. The method of claim 6,
Wherein the monitoring of the LNG regeneration condition includes calculating the average, minimum, and maximum values of the data received from the ship automatic control device using a computing device. A Method for Monitoring the Regeneration Plant of Marine Structures. The method of claim 9,
Wherein the step of monitoring the LNG rejuvenation condition further comprises the step of displaying data calculated by the arithmetic unit and data related to the operation of the ship system using a screen display device. Monitoring method of regasification plant of offshore structures.

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