WO2021024376A1

WO2021024376A1 - Module for natural gas plant

Info

Publication number: WO2021024376A1
Application number: PCT/JP2019/030876
Authority: WO
Inventors: 佳範廣谷; 尚康岡島; 泰祐山本
Original assignee: 日揮グローバル株式会社
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2021-02-11
Also published as: RU2766682C1; CN116659182A; JPWO2021024376A1; KR102485278B1; KR20220013453A; CN112912678A; JP6887071B1

Abstract

[Problem] To provide a module for a natural gas plant, with a high degree of equipment integration and risk-based strength. [Solution] A module M for a natural gas plant comprises: a frame 30 that houses a group of equipment 6 which constitutes a part of the natural gas plant; and a building 50 that houses at least power supply equipment, which is disposed in the frame 30 and supplies electric power to power-consuming equipment, or control information output equipment, which outputs operation control information to a controller that controls the operation of equipment to be controlled using control signals. The area above the location of the building serves as a pipe rack that holds, on the frame, a group of pipes through which the fluid handled in the natural gas plant flows.

Description

Module for natural gas plant

The present invention relates to a technique for constructing a natural gas plant.

Natural gas (NG) plants that process natural gas include liquefied natural gas (LNG) plants that liquefy natural gas, and LPG (Liquefied Petroleum Gas) and heavy components separated from natural gas. There are natural gas treatment plants that perform recovery.
In recent years, when constructing an NG plant, efforts have been made to modularize a large number of devices constituting the NG plant into blocks and incorporating the device groups of each block into a common frame (for example, Patent Document 1 for an LNG plant). ). Hereinafter, the module for constructing a natural gas plant will be referred to as a module for a natural gas (NG) plant.

For example, the module for the NG plant is constructed at a place different from the construction site of the NG plant, and after being transported to the construction site, it is installed in the site. Then, the NG plant is configured by combining a plurality of NG plant modules.

In the frame that constitutes the NG plant module, there are many devices (power consuming devices) that receive power for driving from the outside and devices that perform operation control based on control signals (controlled devices). Will be installed.
Regarding the supply of power to power consuming equipment, the NG plant module is equipped with a transformer that performs voltage conversion, power supply control equipment that controls power supply to each power consuming equipment, and power supply equipment such as circuit breakers and circuit breakers. A substation room may be added.

Regarding the operation control of the controlled equipment, the NG plant module has a flow rate set value, a pressure set value, and a temperature set value received from the operator or the automatic controller in the central control room that controls the entire NG plant. Information related to the operation control of the controlled device, such as, is output to the controller that controls the operation of the controlled device, and information such as the flow rate, pressure, and temperature controlled by the controlled device is output to the central control room. In some cases, an equipment control room equipped with a control information output device that outputs toward the air is installed.

As described in Patent Document 2, when the applicant installs a building constituting the above-mentioned substation room and equipment control room outside the module for the NG plant, the applicant installs a building on the frame of the module at the construction site of the module. We have developed a technology for connecting these modules and building together to transport them to the construction site of an NG plant (Patent Document 2). At the construction site of the NG plant, by removing the connecting member that connects the NG plant module and the building, these modules and the building are separated, and the building is installed at a position adjacent to the NG plant module. ..

In the technique described in Patent Document 2, the range in which the explosion-proof structure is required is locally limited by arranging the building outside the module for the NG plant. As a result, as compared with the case where the building with the explosion-proof structure is provided in the module for the NG plant, the frame itself of the module is made explosion-resistant and the frame is configured to support the high-load building due to the explosion-proof structure. It suppresses the increase in diameter of the steel frame material.
On the other hand, due to restrictions on the site area of the NG plant, it may not be possible to secure a site for the building that is a substation room or equipment control room. In such a case, Patent Documents 1 and 2 do not describe where and what kind of structure the building is to be provided.

International Publication No. 2014/028961 International Publication No. 2019/008725

The present invention provides a module for a natural gas plant having a high degree of integration of equipment and strength according to a risk.

The module for a natural gas plant of the present invention
A frame containing a group of equipment that forms part of the natural gas plant,
A power supply device provided in the frame and supplying power to a power consuming device included in the device group, or a controller included in the device group that controls the operation of the controlled device using a control signal. On the other hand, a building accommodating at least one of the control information output devices for outputting the information related to the operation control is provided.
The area above the layout of the building is characterized by being a pipe rack that holds a group of pipes through which the fluid handled in the natural gas plant flows in the frame.

The module for a natural gas plant may have the following features.
(A) When the frame is configured in a plurality of layers, the building shall be arranged in the lowest layer.
(B) When the power supply device is housed in the building, the power supply device is in a state of being connected to the power consumption device housed in the frame. Further, when a plurality of types of power supply devices having different voltage levels are housed in the building, the power consumption devices having a voltage level of 1000 V or higher are not connected to the power supply devices corresponding to the voltage levels. In this state, the power consuming device having a voltage level of less than 1000 V is connected to the power supply device corresponding to the voltage level.
(C) When the control information output device is housed in the building, the control information output device is in a state of being connected to the controlled device housed in the frame.
(D) An air intake pipe for keeping the internal pressure of the building higher than the atmospheric pressure is connected to the building, and an air intake portion at the end of the intake pipe is arranged in the frame. It must be located higher than the equipment that handles combustible materials.
(E) The building is provided with an entrance / exit so as to open toward the side surface of the frame.

The module for this natural gas plant is installed in the frame, and the building containing the power supply equipment or control information output equipment is located in the lower area of the pipe rack. By arranging the building using the space below the pipe rack, it is possible to contribute to the reduction of the installation area of the module for the natural gas plant.

This is a configuration example of each processing unit included in a liquefied natural gas (LNG) plant. It is a top view which shows the layout example of the module for a natural gas LNG plant arranged in the LNG plant. It is a side view of the module which concerns on embodiment. It is a 1st side view of the module under construction. 2 is a second side view of the module under construction.

Hereinafter, an example in which a liquefied natural gas (LNG) plant is configured by the module for a natural gas plant according to the embodiment will be described. Hereinafter, the module constituting the LNG plant is also simply referred to as a “module”.
FIG. 1 is an example of a schematic configuration of the LNG plant of this example. In the LNG plant, a gas-liquid separation unit 11 that separates a liquid from NG, a mercury removal unit 12 that removes mercury in NG, and an acidic gas removal unit 13 that removes acidic gas such as carbon dioxide and hydrogen sulfide from NG. A water removing unit 14 for removing a small amount of water contained in the NG, a liquefaction processing unit 15 for cooling and liquefying the NG from which these impurities have been removed to obtain LN, and a storage tank for storing the liquefied LNG. It is provided with 17.

The gas-liquid separation unit 11 separates liquid condensate from NG transported by a pipeline or the like at room temperature. For example, the gas-liquid separation unit 11 is added as necessary for the purpose of preventing obstruction of slanted elongated pipes and drums for separating liquid from NG by utilizing the difference in specific gravity and pipelines in the process of transportation. It is equipped with a group of equipment such as an antifreeze regeneration tower and reboiler that heats and regenerates the antifreeze, and ancillary equipment for these.

The mercury removing unit 12 removes a small amount of mercury contained in NG after the liquid is separated. For example, the mercury removing unit 12 includes a group of devices such as a mercury adsorption tower in which the adsorption tower is filled with a mercury removing agent and ancillary equipment thereof.

The acid gas removing unit 13 removes carbon dioxide, hydrogen sulfide, and other acidic gases that may solidify in LNG during liquefaction. Examples of the method for removing acid gas include a method using a gas absorbing solution containing an amine compound and the like, and a method using a gas separation membrane that allows the acid gas in NG to permeate.

When a gas absorption liquid is adopted, the acid gas removing unit 13 includes an absorption tower that brings NG and the gas absorption liquid into countercurrent contact, a regeneration tower for regenerating the gas absorption liquid that has absorbed the acid gas, and a regeneration tower. It is equipped with a reboiler for heating the gas absorption liquid inside, and a group of equipment such as these incidental facilities.
When a gas separation membrane is adopted, the acidic gas removing unit 13 includes a group of devices such as a gas separation unit containing a large number of hollow fiber membranes in the main body and ancillary equipment thereof.

The water removing unit 14 removes a small amount of water contained in NG. For example, the water removing unit 14 is filled with an adsorbent such as a molecular sieve or silica gel, and a plurality of adsorption towers and regenerations are carried out by alternately switching between an NG water removing operation and a water-adsorbed adsorbent regeneration operation. It is provided with a group of devices such as a heater for heating the regenerating gas (for example, NG after removing water) of the adsorbent supplied to the adsorbent tower being operated, and ancillary facilities thereof.

The NG after impurities have been removed by each of the processing units 11 to 14 described above is supplied to the liquefaction processing unit 15 and liquefied. For example, the liquefaction processing unit 15 includes a precooling heat exchanger that precools NG with a precooling refrigerant containing propane as a main component, a scrub column that removes heavy components from NG after precooling, nitrogen, methane, ethane, propane, and the like. Ultra-low temperature heat exchanger (MCHE: Main Cryogenic Heat Exchanger) that cools NG with a mixed refrigerant (Mixed Refrigerant) containing multiple types of refrigerant raw materials to liquefy and overcool, precooling refrigerant and mixed refrigerant vaporized by heat exchange It is provided with a group of equipment such as a refrigerant compressor 21 for compressing gas and ancillary equipment thereof.

In FIG. 1, individual refrigerant compressors (low-pressure MR compressor for mixed refrigerant, high-pressure MR compressor, and C3 compressor for pre-cooling refrigerant) of the precooling refrigerant and the mixed refrigerant are described together. Other than that, the individual description of each device described above is omitted.
Further, although FIG. 1 shows an example in which the gas turbine 22 is used as the power source for driving the refrigerant compressor 21, a motor or the like may be used depending on the scale of the refrigerant compressor 21 and the like.

Further, in the subsequent stage of each refrigerant compressor 21 of the above-mentioned liquefaction processing unit 15, various coolers and capacitors for cooling the compressed refrigerant may be provided. In addition, when the acid gas removing unit 13 uses a gas absorbing liquid, a cooler for cooling the gas absorbing liquid regenerated in the regeneration tower or the tower top liquid may be provided. The LNG plant is provided with a large number of air-cooled heat exchangers (ACHE: Air-Cooled Heat Exchanger) 41 for forming these coolers and condensers and cooling the fluids handled in the LNG plant.

Further, the liquefaction processing unit 15 includes a deetanizer that separates ethane from the liquid (liquid heavy component) separated from the cooled NG, a depropanizer that separates propane from the liquid after ethane separation, and a liquid after propane separation. A rectification section 16 including a debutanizer that separates butane from propane and obtains a liquid condensate at room temperature is provided. The deetaizer, depropanizer, and debutanizer are each equipped with a rectification tower for rectifying each component, a reboiler for heating the liquid in each rectification tower, and a group of equipment such as ancillary equipment thereof. The rectified portion 16 corresponds to the heavy component removing portion of the present embodiment.

Liquefied natural gas (LNG) after being liquefied and supercooled by the liquefaction processing unit 15 is sent to the storage tank 17 and stored. The LNG stored in the storage tank 17 is sent by an LNG pump (not shown) and shipped to an LNG tanker or a pipeline.

In addition, in the LNG plant, various heating operations performed by the above-mentioned processing units 11 to 16 and a heat medium supplied to a heater for preventing freezing of the ground provided on the bottom surface of the storage tank 17 and the like are supplied. Oil heaters and boilers that heat (for example, hot oil and steam) and their ancillary equipment, as well as equipment groups such as gas turbine generators and gas engine generators that supply power consumed in LNG plants and their ancillary equipment. is set up.

FIG. 2 shows an example of the layout of the above-mentioned LNG plant. The LNG plant of this example is configured by combining a common frame 30 with a plurality of modules M accommodating a group of devices (such as frame device 6 and ACHE 41) constituting each of the processing units 11 to 16.
For convenience of illustration showing the arrangement positions of the buildings constituting the substation room and the equipment control room, which will be described later, each module M shown in FIG. 2 indicates the arrangement position of the frame equipment 6 in the lowermost layer of the frame 30 of a plurality of layers. .. However, for the module M provided with the ACHE 41, the ACHE group 4 provided on the upper surface of the frame 30 may be described together, and a part of the frame equipment 6 may be hidden.

In the example shown in FIG. 2, the device group constituting the liquefaction processing unit 15 is further divided into a plurality of groups, and a plurality of modules M in which the device groups of each group are housed in the frame 30 are provided. Further, the

processing units

11, 12, 13, 14, 16 and each device group (framework device 6 and ACHE41) constituting the

other processing units

11, 12, 13, 14, 16 and the oil heater, the boiler, etc. are also processed. A plurality of modules M are provided, which are grouped by each group and house the equipment group of each group in the frame 30.

Further, as shown in FIG. 2, a plurality of modules M on the liquefaction processing unit 15 side are arranged in the horizontal direction, and modules M related to

other processing units

11, 12, 13, 14, 16 and the like are arranged in the horizontal direction. The LNG plant is composed of these two rows of modules M. Further, on both sides of the row of the module M of the liquefaction processing unit 15, an MR compressor and a refrigerant compressor 21 which is a C3 compressor are arranged.
In the following description, the coordinate axes shown by the solid lines in FIG. 2 indicate the orientation of the entire LNG plant. Further, the sub-coordinate axes shown by broken lines in FIGS. 2 to 4 indicate the direction in which each module M is focused, and the base point side of the Y'axis of the sub-coordinate axes is referred to as the rear end side, and the arrow direction side is referred to as the tip side.

A specific configuration example of the module M will be described below. As shown in FIG. 2, the LNG plant of this example is provided with a module M1 in which a plurality of ACHE41s are provided on the upper surface side thereof and an ACHE41. It is composed of two types of modules M with no module M2.
These modules M1 and M2 have the same basic configuration except for the presence or absence of ACHE41. In the following description of the module M, the configurations are common to the modules M1 and M2 except for the description of the ACHE 41.

As shown in FIGS. 2 and 3, the frame 30 constituting each module M has a substantially rectangular planar shape, and the devices included in the device groups of the processing units 11 to 16 are arranged in multiple layers in the vertical direction. It is a steel frame structure that can be used.

On the upper surface of the frame 30, a row of a plurality of ACHE41s arranged along the Y-axis direction from the front end side to the rear end side is provided. Further, a large number of ACHE groups 4 are arranged by providing a plurality of rows of ACHE 41 in the width direction of the frame 30 (for convenience of illustration, an example of three rows is shown in FIG. 2). These ACHE 41s form a part of the equipment group of each processing unit 11 to 16.

As shown in FIG. 3, the space below the area where the ACHE group 4 is arranged is a pipe rack in which a large number of pipes 42 through which the fluid passed between the processing units 11 to 16 flows are arranged. .. These pipes 42 also form a part of the equipment group of each processing unit 11 to 16.
Even in the module M2 in which the ACHE group 4 is not arranged, a pipe rack is provided in the rear end side region which is side by side with the arrangement region of the ACHE group 4 of the other module M1.

Further, in the space below the pipe 42 arranged in the pipe rack and on the tip side of the pipe rack, together with the above-mentioned ACHE 41, the on-site equipment forming a part of the equipment group of each processing unit 11 to 16. 6 is arranged. The on-site equipment 6 includes static equipment such as a tower tank and a heat exchanger, dynamic equipment such as a pump 6a, each static equipment, and connection pipes (not shown) for connecting between the dynamic equipment and the pipe 42 on the pipe rack side. ) Etc. are included.

In the module M having the above configuration, among the devices housed in the frame 30, the power consuming devices such as the ACHE 41 and the pump 6a that consume the driving power are adjusted according to the rated voltage of each power consuming device. The transformed power is supplied via the power supply line.
Therefore, in the frame 30 accommodating these power consuming devices, a substation that performs voltage conversion and a power supply control device that controls power supply to each power consuming device are installed in a building composed of an outer structure partitioned from the surroundings. , A substation (SS) that houses power supply equipment such as circuit breakers and disconnectors will be installed.

Further, for various devices housed in the frame 30, a flow rate adjusting valve for adjusting the flow rate of the fluid, a pressure adjusting valve for adjusting the pressure in the tower tank, and a heat exchanger outlet for the fluid to be adjusted for temperature are adjusted. Includes various controlled devices such as control valves such as flow rate control valves that increase or decrease the flow rate of heat medium and refrigerant, and on-off valves that perform opening and closing operations according to the liquid level in the tower tank. Is done.

A controller is attached to these controlled devices, and the controller outputs a control signal to the controlled device based on the result of detecting the flow rate, pressure, temperature, liquid level, etc. of the fluid by the detection unit, and each controlled device is controlled. A control loop is constructed to control the operation of the device.

At this time, the frame 30 accommodating the equipment related to these control loops is provided with an instrument control room (CR) accommodating control information output equipment called FCS (Field Control Station) in the building. In some cases. The control information output device is information related to the operation control of the controlled device, such as the flow rate set value, pressure set value, and temperature set value received from the operator or automatic control device in the central control room that controls the entire LNG plant. Is output to the controller that controls the operation of the controlled device, and information such as the flow rate, pressure, temperature, and liquid level of the fluid detected by the detection unit is output to the central control room.
The control information output device and the controller and detection unit of each controlled device are connected via a signal line. Further, in the following description, the building constituting the above-mentioned substation room and equipment control room will be referred to as SS / CR50.

In the present embodiment, the SS / CR50 attached to each module M is provided inside the area surrounded by the frame 30 constituting the module M together with the other 6 groups of frame devices, and is integrated with the module M. It can be transported to.
As shown in FIG. 3, when the surfaces formed by the plurality of beams laid horizontally at the same height position among the large number of columns and beams constituting the frame of the frame 30 are set as each layer of the frame 30, the frame is as shown in FIG. 30 is composed of a plurality of layers (4 layers in the example of the figure).

The SS / CR50 of this example is arranged in the lowest layer of the frame 30 having the above-mentioned multi-layer structure. Further, as described above, the area above the position where the SS / CR50 is arranged is a pipe rack in which the pipe 42 group through which the fluid handled in the LNG plant flows is held by the frame. In other words, the SS / CR50 is provided in the space below the pipe rack.

As described above, in the module M of this example, the SS / CR50, which is a building having a closed structure, is arranged below the pipe 42 through which the flammable fluid flows. Generally, when the building is arranged near the equipment (including the pipe 42) that handles flammable fluids, the explosion-proof structure and the explosion-proof structure are examined.
The explosion-resistant structure means that the strength of the constituent members of the building is designed so that damage to the building can be suppressed even if an explosion occurs around the building. The explosion-proof structure is a mechanism that suppresses the entry of flammable substances into the building and suppresses ignition even when flammable substances enter.

API RP (American Petroleum Institute Recommended Practice) 752 is one of the methods (Management System) for determining the strength of building components related to the explosion-resistant structure and the discharge capacity of toxic substances that have entered the building (American Petroleum Institute Recommended Practice) 752 ( Hereinafter, it is simply described as "API752").
Regarding the method for determining the explosion-resistant structure, API752 includes (1) assuming the maximum event that can affect the building, and quantitatively and qualitatively evaluating the resulting consequences, and (2) for the building. Consider the frequency of stay of personnel and the function of the building as an evacuation site, (3) Based on the results of these studies, formulate the standards for the explosion resistance of the building, and design the strength of the building according to the standards. That is described.

API752 is the recommended method in the United States, but the strength of the building may be designed according to the method even in the construction of LNG plants in other countries.
When this method is adopted, as shown in FIG. 3, under the condition that the SS / CR50 is arranged in the space below the pipe rack in which the pipe 42 through which the flammable fluid flows is arranged, the building constituting the SS / CR50 On the other hand, it is highly likely that extremely high explosion resistance is required. As a result, the weight of the SS / CR50 also increases, and in order to hold the SS / CR50, the diameter of the steel frame material constituting the frame 30 also increases, which causes an increase in the material cost and the transportation cost of the frame 30.

On the other hand, as compared with the conventional LNG plant in which a large number of devices and racks supporting these devices are sequentially installed in the construction site, the module M of this example is the frame device 6 in each frame 30. High degree of integration. In other words, in the module M, it can be said that the frame equipment 6 for handling the flammable fluid is centrally arranged in a limited area.

Then, as shown in FIG. 2, each module M is arranged with a gap between the modules M and the other adjacent modules M. That is, unlike the conventional LNG plant in which a large number of devices are arranged on the ground, the LNG plant composed of the module M has a structure that can be easily evacuated through the gap once it goes out of the module M. ing.
Further, unlike the central control room where the operator of the LNG plant is resident, each SS / CR50 is usually a building without personnel except at the time of inspection or maintenance.

Considering these facts, in this example, it is necessary to design the strength of SS / CR50 after ensuring the safety of personnel according to the design method of the explosion-resistant structure of the building in the LNG plant (for example, API752 described above). It can be said that it is rational in module M.
Regarding ensuring the safety of personnel, if personnel are staying in the SS / CR50 in the event of a fire, etc., the structure makes it easy to quickly evacuate to the outside of the module M instead of staying in the SS / CR50. It is rational to adopt, and then limit the safety-related functions held by the SS / CR50.

From this point of view, as shown in FIG. 2, the SS / CR50 arranged in each module M has a plurality of doorways at different positions so as to open toward the side surface of the frame 30 (doors of the doorways in the figure). 52) is provided. By arranging the doorway in this way, even if a person is staying in the SS / CR50, it can be immediately evacuated to the outside of the module M in the event of a fire or the like.

On the other hand, as described above, when evacuation to the outside of the module M is a prerequisite for ensuring the safety of personnel, it is not rational to provide SS / CR50 with an excessive explosion-proof structure.

Focusing on the structure of the module M, which has a high degree of integration of the framed equipment 6 and makes it easy for personnel to evacuate, by adopting explosion-resistant strength according to the risk, the SS / CR50 can be overweight and the SS / CR50 can be increased. It is also possible to suppress an increase in the diameter of the steel frame material of the frame 30 to be held.

Further, as shown in FIG. 4, the SS / CR50 provided in the module M of this example has an air intake for keeping the internal pressure of the SS / CR50 higher than the atmospheric pressure as one of the explosion-proof structures. The pipe 531 is connected. For example, the intake pipe 531 is provided so as to extend upward along the side surface of the frame 30. The air intake portion 532 at the end of the intake pipe 531 is arranged at a position higher than the combustible material handling device arranged in the frame 30 of the module M. In particular, in the module M1 provided with the ACHE 41, the air intake unit 532 is arranged at a position higher than the arrangement position of the ACHE 41.

The construction process of the module M in which the SS / CR50 is provided inside the frame 30 described above will be described with reference to FIG.
As shown in FIG. 4A, the module M is constructed in a construction site called a module yard, which is different from the construction site of the LNG plant. On the other hand, the SS / CR50 may be assembled in a factory called a shop, which is located in a place different from the module yard and is provided near a manufacturer of a power supply device or a control information output device.

In the module yard, the module M'under construction arranges the frame equipment 6 on each floor while assembling the frame 30 in order from the lower floor. At this time, when the SS / CR50 is arranged in the lowermost layer of the frame 30, it seems that the construction of the module M'under construction cannot be started unless the assembly of the SS / CR50 in the shop is completed.

However, if you wait for the SS / CR50 to be assembled, the module M construction period may become excessively long. Therefore, in the module M'under construction shown in FIG. 4A, the construction of the module M'under construction is advanced leaving a space in which the SS / CR50 is arranged. During this period, the SS / CR50s placed on the gantry 501 will be assembled in parallel at the shop.

Then, as shown in FIG. 4B, when the construction of the module M is almost completed, the SS / CR50 assembled at the shop is transported to the module yard, and the SS / CR50 is inserted into the arrangement area under the pipe rack. After that, for example, by connecting the frame 501 and the frame 30, the SS / CR50 is installed in the module M (FIG. 4B).

As described above, after the completion of the LNG plant, the power supply equipment in the SS / CR50 and the power consumption equipment in the frame 30 are connected via a feed line, and the control information output in the SS / CR50 is output. The device and the controller and the detection unit of the controlled device in the frame 30 are connected to each other via a signal line.
At this time, if the connection of these feeder lines and signal lines is completed in the module M in which the SS / CR50 is already installed, the man-hours after installing the module M on the construction site will be significantly increased. Can be reduced.

Therefore, after the SS / CR50 is installed in the frame 30, a power supply device (not shown) housed in the SS / CR50 and a power consumption device arranged in the same frame 30 are connected via a feeder line 51. Connect and perform power supply test. In FIG. 3, the feeder line 51 is shown by a broken line.

Here, in the module M, power consuming devices having a plurality of types of voltage levels having different working voltages may be arranged. At this time, for example, a power consuming device having a medium voltage or low voltage level of less than 1000 V is relatively easy to connect to the power supply device and to perform an energization test. Therefore, it is suitable for prior connection work and energization test work before the module M is installed on the construction site.
On the other hand, a power consuming device having a high voltage level of 1000 V or higher requires a large connection jig and test device, and may not be suitable for connection work and energization test work in a module yard.

Therefore, in the module M of this example, when a plurality of types of power supply devices having different voltage levels are housed in the SS / CR50, the power consuming device having a voltage level of 1000 V or more has the power corresponding to the voltage level. It may be in a state of not being connected to the supply device. In the example of the module M shown in FIG. 3, a large pump 6a corresponds to this.
On the other hand, the power consuming device having a voltage level of less than 1000 V is in a state of being connected to a power supply device corresponding to the voltage level. In the example shown in FIG. 3, each ACHE 41 corresponds to this.

Further, in the module yard, when the control information output device is housed in the SS / CR50, the control information output device is connected to the controlled device housed in the frame 30 via a signal line. Work, control signal transmission / reception test work may be performed. In FIG. 3, the description of the control information output device, the controlled device, and the signal line is omitted.

After the work described above is completed, the module M on which the SS / CR50 is installed will be transported to the construction site using a carrier or a transport vehicle. Next, the module M is connected to the foundation pre-installed in the site, and the lower end of the frame 30 and the lower end of the base 501 of the SS / CR50 are fixed to the foundation.

Module M is installed at a predetermined position, pipes are connected between multiple modules M and external devices of module M, and power supply lines are connected from power generation equipment to each SS / CR50 which is a substation. The signal line is connected between the main control room and each SS / CR50 which is the equipment control room. Further, in each module M, if the connection between the high-voltage power consuming device of 1000 V or more and the power supply device corresponding to the voltage level and the power supply test are not completed, these operations are also performed.
By carrying out these operations, an LNG plant can be constructed.

According to the module M according to the present embodiment, there are the following effects. The module M of this example is provided in the frame 30, and the SS / CR50 in which the power supply device or the control information output device is housed is arranged in the lower region of the pipe rack. By arranging the building using the space below the pipe rack, it is possible to contribute to the reduction of the installation area of the module M.

Here, the position where the SS / CR50 is arranged is not limited to the lowest layer of the frame 30. SS / CR50 may be arranged at height positions of two or more layers as long as it is inside the frame 30 excluding the upper surface (top layer) of the frame 30.

Further, the plant that can be constructed by using the above-mentioned module M provided with SS / CR50 is not limited to the LNG plant. This technology can also be applied to a natural gas processing plant that separates and recovers LPG and natural gas liquid, which is a heavy component, from natural gas.

M, M1, M2
Module 30 Frame 50 SS / CR
51 Feed line 6 On-site equipment

Claims

In modules for natural gas plants
A frame containing a group of equipment that forms part of the natural gas plant,
A power supply device provided in the frame and supplying power to a power consuming device included in the device group, or a controller included in the device group that controls the operation of the controlled device using a control signal. On the other hand, a building accommodating at least one of the control information output devices for outputting the information related to the operation control is provided.
A module for a natural gas plant, characterized in that the area above the arrangement of the building is a pipe rack that holds a group of pipes through which a fluid handled in the natural gas plant flows in the frame.
The module for a natural gas plant according to claim 1, wherein when the frame is configured in a plurality of layers, the building is arranged in the lowest layer.
The first aspect of claim 1, wherein when the power supply device is housed in the building, the power supply device is connected to the power consumption device housed in the frame. Module for natural gas plants.
When a plurality of types of power supply devices having different voltage levels are housed in the building, the power consumption devices having a voltage level of 1000 V or higher are not connected to the power supply devices corresponding to the voltage levels. The module for a natural gas plant according to claim 3, wherein the power consuming device having a voltage level of less than 1000 V is in a state of being connected to a power supply device corresponding to the voltage level. ..
Claim 1 is characterized in that when the control information output device is housed in the building, the control information output device is in a state of being connected to the controlled device housed in the frame. Modules for natural gas plants as described in.
An air intake pipe for maintaining the internal pressure of the building at a pressure higher than the atmospheric pressure is connected to the building, and an air intake portion at the end of the intake pipe is flammable arranged in the frame. The module for a natural gas plant according to claim 1, wherein the module is arranged at a position higher than a device for handling an object.
The module for a natural gas plant according to claim 1, wherein the building is provided with an entrance / exit so as to open toward the side surface of the frame.