RU2766682C1 - Module for natural gas processing plant - Google Patents

Abstract

FIELD: natural gas processing.

SUBSTANCE: module for a natural gas processing plant is proposed, which has a high degree of equipment integration, as well as having strength in accordance with the risk. Module (M) for a natural gas processing plant includes: a structure (30) containing a group of equipment (6) forming part of a natural gas processing plant; and a building (50) housing at least one of a power supply device or a control information output device. The power supply device is provided in the structure (30) and is configured to power the power-consuming equipment. The control information output device is configured to output information about the operational control of the equipment to be controlled to a controller configured to perform operational control using a control signal.

EFFECT: in the area above the position where the said building is located, a pipe rack is provided, holding by its structure a group of pipes, through which the movement of the fluid pumped at the natural gas processing plant is provided.

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Description

Technical field

[0001] The present invention relates to a technology for constructing a natural gas processing plant.

State of the art

[0002] As natural gas (NG) processing plants capable of processing natural gas, for example, liquefied natural gas (LNG) plants configured to liquefy natural gas and natural gas processing plants configured capable of separating and recovering liquefied petroleum gas (LPG) or heavy components from natural gas.

In recent years, in the construction of a NG plant, an attempt has been made to modularize a NG plant by dividing a large number of pieces of equipment included in a NG plant into blocks and combining groups of equipment in blocks into a common structure (for example, patent literature 1 for an LNG plant). The module for building a natural gas processing plant is hereinafter referred to as a "module for a natural gas (NG) processing plant".

[0003] For example, a module for a GHG plant is built on a site different from the construction site of the NG plant. The built module is transported to the construction site and then mounted on this site. Thereafter, a plurality of modules for the GHG plant are combined, configuring the GHG plant.

[0004] In the building included in the module for the NG plant, a large number of equipment items (energy consuming equipment) configured to receive energy for driving from the outside, and a large number of equipment items (controlled equipment) to be operationally controlled by a control signal are mounted.

With regard to the supply of energy-consuming equipment, a substation can be additionally provided in the module for the SG plant. The substation comprises a transformer capable of converting voltage, a power control device configured to control the power of each element of the energy-consuming equipment, and a power supply device such as a switch or breaker.

[0005] In addition, with regard to the operational control of the equipment to be controlled, an instrument control room can be additionally provided in the module for the GHG plant. In the instrument control room, there is a control information output device configured to output to the controller configured to perform operational control of the equipment to be controlled information on the operational control of the equipment to be controlled, such as the flow rate set value, the pressure set value, and the set value. temperatures that come from the operator or automatic control device in the central control room, which is designed to carry out overall control of the entire NG plant. The control information output device is further configured to output information such as flow rate, pressure and temperature to be controlled using the equipment to be controlled to the central control room.

[0006] As described in Patent Literature 2, the Applicant has developed a technology in which a building constituting the aforementioned substation or instrument control room is further provided outside the module for a GHG plant, said building is connected to the module structure at the module construction site, and transported together the module and said building to the SG plant construction site (Patent Literature 2). At the construction site of the NGG plant, the connecting element connecting the module for the NGG gas plant and said building is dismantled, separating the module and said building from each other. Thus, a state is provided in which said building is further provided in a position adjacent to the module for the GHG plant.

[0007] In the technology described in Patent Literature 2, said building is located outside the module for the GHG plant, and therefore a blast-resistant structure in a limited space is needed. As a result, compared with the case where a building having a blast-resistant structure is provided in a module for a SG plant, the need to manufacture the structure of the module having a blast-resistant structure itself can be reduced, or the diameter of the steel frame material constituting the structure can be increased, due to the need maintaining a building with a high load due to a blast-resistant design.

At the same time, it may not be suitable for removal from the building addition site constituting the substation or instrument control room due to restrictions in the construction site of the SG plant or the like. For such a case, patent literature 1 or 2 does not indicate the location of provision and the type of building configuration.

Bibliography

Patent Literature

[0008]

[Patent literature 1] WO 2014/028961 A1

[Patent literature 2] WO 2019/008725 A1

Disclosure of the essence of the invention

Technical problem

[0009] The present invention provides a module for a natural gas processing plant having a high degree of equipment integration as well as strength according to risk.

Solution to the problem

[0010] A module for a GHG plant according to one embodiment of the present invention comprises: a structure housing a group of equipment constituting a part of a natural gas processing plant; and a building housing at least one of a power supply device or a control information output device, the power supply device being provided in said structure and configured to supply power to power-consuming equipment included in the equipment group; a control information output device is included in the equipment group and is configured to output information about the operational control of the equipment to be controlled to the controller, configured to perform operational control using the control signal, while in the area above the position in which the building is located, pipe rack for holding this design of a group of pipes through which you can transport the fluid pumped in the natural gas processing plant.

[0011] A module for a natural gas processing plant may have the following features.

(a) If the specified structure has multiple floors, then the specified building is on the lowest floor.

(b) If the specified building contains a power supply device, the power supply device is brought into a state of connection to the power-consuming equipment located in the specified structure. In addition, if a building houses a plurality of types of power supply devices differing in voltage level, power-consuming equipment with a voltage level of 1000 V or more is in a state in which it is not connected to a power supply device corresponding to the specified voltage level, and power-consuming equipment having a voltage level voltage less than 1000 V, brought to the state of connection to the power supply device corresponding to the specified voltage level.

(c) If said building houses the control information output device, the control information output device is brought into a state of connection with the equipment to be controlled and housed in the said building.

(d) The building is connected to an air intake duct to maintain the internal pressure in the building at a level higher than atmospheric pressure, and the air intake duct has an end part corresponding to the air intake part, the location of which is higher than the location of the equipment for moving combustible materials located in the structure.

(e) The building is provided with an entrance provided to open towards the side of the structure.

Useful effect of the invention

[0012] In the module for the natural gas processing plant according to the present invention, a building that is provided in the structure and houses the power supply device or the control information output device is located in the area below the pipe rack. By arranging the building by utilizing the space under the pipe rack, it is possible to reduce the installation area of the module for the natural gas processing plant.

Brief description of the drawings

[0013] FIG. 1 is an illustration of an example configuration of each process unit included in a liquefied natural gas (LNG) plant.

In FIG. 2 is a top view illustrating an example of the layout of LNG plant modules to be placed in the LNG plant.

In FIG. 3 is a side view of a module according to one embodiment of the present invention.

In FIG. 4A is a first side view of the module under construction.

In FIG. 4B is a second side view of the module under construction.

Description of embodiments of the invention

[0014] The following is a description of an example in which a liquefied natural gas (LNG) plant is composed of a module for a natural gas processing plant in accordance with one embodiment of the present invention. The module constituting the LNG plant is referred to hereinafter as a "module" for simplicity.

In FIG. 1 is an illustration of one example of a schematic configuration of an SGP plant from this example. The LNG plant contains a gas-liquid separation unit 11, a mercury removal unit 12, an acid gas removal unit 13, a moisture removal unit 14, a process liquefaction unit 15, and a storage tank 17. The gas-liquid separation unit 11 is configured to separate liquid from the NG. The mercury removal unit 12 is configured to remove the mercury contained in the GHG. The acid gas removal unit 13 is configured to remove carbon dioxide, hydrogen sulfide and other acid gases from SG. The moisture removal unit 14 is configured to remove a trace amount of moisture contained in the steam generator. Technological installation 15 liquefaction is made with the possibility of cooling and liquefaction of NG, from which these impurities are removed, with the production of LNG. Storage tank 17 is configured to store liquefied LNG.

[0015] The gas-liquid separation plant 11 is configured to separate condensate, which is liquid at normal temperature, from NG transported through a pipeline or the like. For example, the gas-liquid separation plant 11 includes an equipment group containing an elongated pipe and drum, a regeneration column and a liquid antifreeze reboiler, and auxiliary elements. The elongated pipe and the drum are located at an angle and are made with the possibility of extracting liquid from the steam generator due to the difference in specific densities. The recovery column and liquid antifreeze reboiler are configured to heat and regenerate liquid antifreeze, which is added as needed to prevent clogging of the pipeline during transportation.

[0016] The mercury removal unit 12 is configured to remove trace amounts of mercury contained in GHG from which the liquid has been removed. For example, the mercury removal plant 12 includes an equipment group containing a mercury adsorption tower, the adsorption tower being filled with a mercury removal agent, as well as auxiliary elements.

[0017] The acid gas removal unit 13 is configured to remove carbon dioxide, hydrogen sulfide, and other acid gases that may solidify in the LNG during liquefaction. As a method for removing acid gas, there are known methods using a getter liquid containing an amine compound or the like, and a method using a gas separation membrane through which acid gas contained in NG can pass.

[0018] When using the getter liquid, the acid gas removal unit 13 comprises an equipment group including an absorption column, a regeneration column, a reboiler, and auxiliary elements. The absorption column is configured to bring the steam generator and the gas-absorbing liquid into countercurrent contact with each other. The regeneration column is configured to regenerate the getter liquid containing the absorbed acid gas. The reboiler is configured to heat the gas-absorbing liquid in the regeneration column.

In addition, when using a gas separation membrane, the acid gas removal unit 13 includes a group of devices containing a gas separation unit accommodating a large number of hollow fiber membranes in the main body, as well as auxiliary elements.

[0019] The dehumidifier 14 is configured to remove trace amounts of moisture contained in the PG. For example, the dehumidifier 14 includes an equipment group containing a plurality of adsorption towers, a heater, and auxiliary elements. A plurality of adsorption columns are filled with molecular sieve, silica gel or other adsorbent, and alternately, by switching, the operation of removing moisture from the SG and the operation of regenerating the adsorbent containing adsorbed moisture are performed. The heater is configured to heat the regeneration gas (for example, SG from which moisture has been removed) for the adsorbent supplied to the adsorption column in which the regeneration operation is carried out.

[0020] The PG, which has been decontaminated by the process units 11-14 described above, is fed into the liquefaction process unit 15 for liquefaction. For example, the process unit 15 liquefaction contains a group of equipment, including a pre-cooling heat exchanger, a scrub column, a main cryogenic heat exchanger (MCHE), a refrigerant compressor 21, and auxiliary elements. The pre-cooling heat exchanger is configured to pre-cool the SG using a pre-cooling refrigerant containing propane as the main component. The scrubber column is designed to remove the heavy component from the pre-cooled SG. The main cryogenic heat exchanger (MCHE) is configured to cool, liquefy and subcool the SG using a mixed refrigerant containing many different types of initial refrigerants, such as nitrogen, methane, ethane and propane. The refrigerant compressor 21 is configured to compress the gaseous pre-cooling refrigerant and the mixed refrigerant, which are gasified by heat exchange.

[0021] In FIG. 1 separate illustrations of the above equipment are missing, with the exception of separate refrigerant compressors for precooling refrigerant and blended refrigerant (low pressure mixed refrigerant (MR) compressor and high pressure MR compressor for blended refrigerant, and C3 compressor for precooling refrigerant), which are shown together as one unit.

In addition, in FIG. 1 shows an example using a gas turbine 22 as a power source, which is configured to drive the refrigerant compressor 21, but, for example, according to the power of the refrigerant compressor 21, an engine can be used.

[0022] In addition, at the next stage of each refrigerant compressor 21 of the liquefaction process unit 15 described above, various coolers and condensers can be provided to cool the compressed refrigerant. In addition, if a getter liquid is used in the acid gas removal unit 13, a cooler can be provided to cool the overhead liquid and the getter liquid regenerated in the recovery column. The LNG plant includes a plurality of air-cooled heat exchangers (ACHE) 41 corresponding to said coolers and condensers and configured to cool the fluid pumped in the LNG plant.

[0023] In addition, in the liquefaction process unit 15, a distillation unit 16 is additionally provided. The distillation unit 16 contains a deethanizer, a depropanizer and a debutanizer. The deethanizer is configured to separate ethane from the liquid (heavy liquid component) separated from the cooled steam generator. The depropanizer is configured to extract propane from the liquid from which ethane is separated. The debutanizer is configured to extract butane from the liquid from which propane is separated, to obtain a condensate that is liquid at normal temperature. Each of the deethanizer, depropanizer and debutanizer contains a group of equipment containing a distillation column, a reboiler and auxiliary elements. The distillation column is made with the possibility of distillation of each component. The reboiler is configured to heat the liquid in each distillation column. In this embodiment, distillation unit 16 corresponds to a heavy component removal unit.

[0024] Liquefied natural gas (LNG) subjected to liquefaction and subcooling in the liquefaction process unit 15 is supplied and stored in storage tank 17. LNG, which is stored in storage tank 17, is pumped out using an LNG pump (not shown) and pumped in LNG tanker or pipeline.

[0025] In addition, the LNG plant also installed an equipment group containing an oil heater, a boiler and auxiliary elements, as well as an equipment group containing a gas turbine generator, a gas engine generator and auxiliary elements. The oil heater and the boiler are configured to perform various heating operations in each of the aforementioned process units 11-16 and to perform heating of a heat carrier (for example, hot oil or steam) supplied to, for example, a heater configured to prevent freezing of the ground surface, which is at the bottom surface of the storage tank 17. The gas turbine generator and the gas engine generator are configured to supply the energy consumed in the LNG plant.

[0026] FIG. 2 is an illustration of one example layout of the aforementioned LNG plant. The LNG plant of this example contains a plurality of combined modules M. A plurality of modules M accommodate in a common building 30 groups of equipment (for example, built-in equipment 6 and ACHE 41) forming process units 11-16.

For convenience in illustrating the layout of a building constituting a substation or instrument control room to be described below, each of the modules M shown in FIG. 2 shows the location of the built-in equipment 6 on the lower floor of the building 30 having a plurality of floors. However, with regard to the module M containing the ACHE heat exchanger 41, the ACHE heat exchanger group 4 provided on the upper surface of the structure 30 is also shown, and some of the built-in equipment 6 may not be visible.

[0027] In the example shown in FIG. 2, the equipment group included in the liquefaction process plant 15 is further divided into a plurality of groups, and a plurality of modules M are provided accommodating the equipment groups of the divided groups in the building 30. In addition, the equipment groups (built-in equipment 6 and ACHE heat exchanger 41) included into other process units 11, 12, 13, 14 and 16, oil heater and boiler, are also divided into groups, for example, according to process units 11, 12, 13, 14 and 16, and several modules M are provided to accommodate groups of equipment divided groups in the building 30.

[0028] In addition, as shown in FIG. 2, said plurality of modules M for the liquefaction process unit 15 are arranged in the horizontal direction, and modules M for other process units 11, 12, 13, 14, 16, and the like. located in a horizontal direction. These modules M arranged in two rows form an LNG plant. In addition, the refrigerant compressors 21 corresponding to the compressor MR and the compressor C3 are located on both sides of the row of modules M for the liquefaction process unit 15.

In the following description, the coordinate axes indicated by solid lines in FIG. 2 designate directions throughout the LNG plant. In addition, the auxiliary coordinate axes indicated by dotted lines in FIG. 2 - fig. 4A and 4B denote directions determined by focusing on each M module. The origin side of the Y-axis' of the sub-coordinate axes is referred to as the "back side", and its arrowed side is referred to as the "far side".

[0029] The following describes a specific configuration example of the M module. As shown in FIG. 2, the LNG plant in this example contains two types of modules M, in particular module M1 containing a plurality of ACHE 41 heat exchangers on its upper surface, and module M2 containing no ACHE 41 heat exchangers.

The M1 and M2 modules shown are generally the same configuration, except for the presence and absence of ACHE 41 heat exchangers. The following description of the M modules is common to the M1 and M2 modules, with the exception of the description regarding ACHE 41 heat exchangers.

[0030] As shown in FIG. 2 and FIG. 3, the structure 30 included in each module M is constructed in a substantially rectangular shape in plan view and is a steel frame structure that allows equipment included in process plant equipment groups 11-16 to be arranged in a sandwich structure in vertical direction.

[0031] On the top surface of the structure 30, a row of a plurality of ACHE heat exchangers 41 is provided along the Y-axis direction from the far side to the rear side. In addition, a plurality of rows of ACHEs 41 are provided (an example of three rows is shown in FIG. 2 for ease of illustration) in the width direction of the structure 30. Thus, a large number of groups 4 of ACHEs are arranged. ACHE 41 heat exchangers form part of process plant equipment groups 11-16.

[0032] As shown in FIG. 3, in the space below the zone in which the group 4 of the ACHE heat exchangers is located, a pipe rack is provided, in which a large number of pipes 42 are located, through which it is possible to transport the fluid pumped between the process units 11-16. Pipes 42 also form part of the process plant equipment groups 11-16.

Also in the M2 module, which does not have an ACHE group 4, a pipe rack is provided in the backside area adjacent to the ACHE group 4 area of another M1 module.

[0033] In addition, in the space below the pipes 42 located on the pipe rack, and in the space on the far side with respect to the pipe rack, built-in equipment 6 is located, forming part of the equipment groups of process plants 11-16, together with the aforementioned ACHE heat exchangers 41 Built-in equipment 6 includes static equipment such as columns, reactors and heat exchangers, dynamic equipment such as a pump 6a, and connecting pipes (not shown) configured to connect the static equipment and dynamic equipment to each other or connect equipment and pipes 42 on the side of the pipe rack with each other.

[0034] In the module M having the above configuration, among the equipment located in the building 30, the ACHE heat exchangers 41, the pump 6a and other power-consuming equipment that consumes energy to provide a drive, through the supply lines receive electricity with a converted voltage in accordance with the rated voltage each element of energy-consuming equipment.

In view of the foregoing, the building 30 additionally provides a substation (SS), which houses the power-consuming equipment. The substation (SS) accommodates in a building formed by an external housing separated from the environment, a transformer configured to convert voltage, a power control device configured to control the power of each element of the power-consuming equipment, and a power supply device such as a switch or breaker.

[0035] In addition, various types of equipment located in the building 30 include various types of controllable equipment such as a control valve and an open/close valve. Examples of the control valve include a flow control valve configured to control the flow rate of a fluid, a pressure control valve configured to control the column or reactor pressure, and a flow control valve configured to increase or decrease the flow rate of a heat transfer medium or refrigerant to control the temperature. fluid at the outlet of the heat exchanger. The open/close valve is open or closed according to the liquid level in the column or reactor.

[0036] A controller is additionally provided for the controlled equipment. The controller is configured to output control information to the controlled equipment based on the results obtained as a result of determining the flow rate, pressure, temperature, fluid level, and the like using the sensor. for the implementation of technological control of each element of the controlled equipment. Thus, a control loop is created.

[0037] In such a case, in the building 30 housing the equipment that belongs to the control loop, in the specified building, a control room (CR) can be additionally provided to accommodate the control information output device, which is called the shop control station (field control). station, FCS) or the like. The control information output device is configured to output to the controller, configured to perform operational control of the equipment to be controlled, information on the operational control of the equipment to be controlled, such as the flow rate set value, the pressure set value, and the temperature set value, which are received from the operator. or an automatic control device in a central control room capable of overall control of the entire LNG plant. The control information output device is further configured to output to the central control room information such as flow rate, pressure, temperature and fluid level that are detected by the sensing element.

The control information output device is connected to the controller or sensing element of each piece of controlled equipment via a signal line. In addition, in the following description, the building constituting the aforementioned substation or equipment control room is referred to as "SS/CR 50".

[0038] In this embodiment, the SS/CR 50 additionally provided in each module M is provided on the inside of the area surrounded by the structure 30 included in the module M, along with other groups of built-in equipment 6. Thus, the SS/CR 50 and module M can be transported as a whole.

If, among a large number of columns and beams forming the structure of structure 30, a plurality of beams connected horizontally at the same height form a surface that is defined as the floor of structure 30, as shown in FIG. 3, the building 30 has a plurality of floors (in the example of Fig. 3, four floors).

[0039] SS/CR 50 in this example is located on the lower floor of the building 30 having the above multi-storey structure. In addition, in the area above the position in which the SS/CR 50 is located, as described above, a pipe rack is provided, in which a group of pipes 42, through which the fluid is transported in the LNG plant, is supported by this structure. In other words, SS/CR 50 is provided in the area below the pipe rack.

[0040] As described above, in the module M according to this example, SS/CR 50, corresponding to a building having a closed structure, is located under pipes 42, through which combustible fluid is allowed to flow. In general, if a building is located in the vicinity of equipment (including pipes 42) capable of pumping a combustible fluid, a study is made of the explosion resistance of the structure and the explosion safety of the structure.

Structural explosion resistance refers to the strength analysis of the constituent elements of a building, which is carried out to ensure that damage to the building is reduced even in the event of an explosion near the building. In addition, structural explosion safety refers to a mechanism for preventing the entry of combustible material into the inside of a building and preventing ignition even if combustible material enters the inside of a building.

[0041] As one method (control system) for determining the strength of building components and the possibility of release of a toxic substance entering a building, for a blast-resistant structure, American Petroleum Institute Recommended Regulation (API RP) 752 (hereinafter referred to as "API 752") is known.

Regarding how to determine the blast resistance of a structure, API 752 recommends (1) to assume the most severe situation that can affect the building, and perform a quantitative and qualitative assessment to draw an appropriate conclusion based on this, (2) consider the likelihood of being in the building of people and the function of the building as an evacuation site, and (3) in accordance with the results of these studies, develop criteria for the explosion resistance of the building and perform a calculation of the strength of the building based on these criteria.

[0042] API 752 is the method recommended in the United States of America, but in some cases this method is also followed in the construction of an LNG plant in other countries to calculate the strength of the building.

When using this method, provided that, as shown in FIG. 3, the SS/CR 50 is located in the area below the pipe rack in which the pipes 42 are placed, through which the flammable liquid is allowed to flow, there is a high probability that the building forming the SS/CR 50 must have a very high blast resistance. As a result, the weight of the SS/CR 50 is increased, and in order to support the SS/CR 50, the diameter of the steel frame material constituting the structure 30 is increased. For these reasons, the cost of the material and the cost of transporting the structure 30 increase.

[0043] At the same time, compared with the prior art LNG plant in which a large number of pieces of equipment and a trestle capable of holding said pieces of equipment are sequentially mounted on a construction site, the module M in this example has a high degree of integration built-in equipment 6 in each building 30. In other words, module M can be said to contain built-in equipment 6 capable of pumping a flammable fluid that are closely spaced in a confined space.

[0044] In addition, as shown in FIG. 2, each M module is installed with clearances fixed with respect to other adjacent M modules. In other words, unlike the prior art LNG plant in which a large number of pieces of equipment are placed on the ground, the proposed LNG plant containing the M modules is structured so that people can easily exit through the specified clearances immediately after exiting the M modules.

In addition, unlike the central control room that houses the LNG plant operator at all times, each SS/CR 50 is a building that is normally unoccupied except during inspection or maintenance periods.

[0045] In view of these facts, it can be said that in module M according to the example given, it is advisable to perform the strength calculation of SS/CR 50 in accordance with the design methodology for the design of a blast-resistant structure of an LNG plant building (for example, API 752, described above) while ensuring the safety of people .

In order to ensure the safety of people, it is advisable to use a structure in which, if people are in the SS/CR 50 when a fire occurs or in a similar situation, people can quickly and easily leave the M module, rather than stay inside the SS/CR 50, and then limit the function of the SS /CR 50 safety-related when using this design.

[0046] In view of the above, as shown in FIG. 2, the SS/CR 50 installed in each module M has a plurality of entrances (in FIG. 2 entrance doors 52 are shown) in various positions opening towards the side surfaces of the structure 30. As described above, the entrances are provided so that even if inside SS/CR 50 are left with people, they can immediately leave module M in the event of a fire or similar situations.

[0047] At the same time, as described above, if the safety of people is ensured based on the assumption that people can go beyond the module M, it is inappropriate to provide an SS/CR 50 having an excessively explosion-proof design.

[0048] If attention is paid to the design of the module M, having a high degree of integration of the built-in equipment 6 and allowing people to quickly exit, the explosion resistance can be selected according to the risk in order to limit the excessive increase in mass of the SS/CR 50 and increase the diameter of the material of the steel frame of the structure 30 configured to hold the SS/CR 50.

[0049] In addition, as shown in FIG. 33, as one explosion-proof design, the module M of this example provides an air intake duct 531 connected to the SS/CR 50 to maintain the internal pressure in the SS/CR 50 above atmospheric. For example, the air intake duct 531 is configured to extend upward along the side surface of the structure 30. The air intake duct 531 has an end portion corresponding to the air intake portion 532, and the air intake portion 532 is located higher than the combustible material handling equipment located in the structure. 30 of module M. In particular, in module M1 containing the ACHE 41 heat exchangers, the air intake portion 532 is located higher than the ACHE 41 heat exchangers are located.

[0050] With reference to FIG. 4A and 4B describe the construction steps of module M in which the SS/CR 50 is provided on the inside of the structure 30 described above.

As shown in FIG. 4A, module M is built at a construction site, referred to as a "modular site", different from the construction site of the LNG plant. At the same time, the SS/CR 50 can be assembled in a factory called "workshop", which is a place other than a modular construction site, and provided near the manufacturer of the power supply device or the control information output device.

[0051] In the module M' being built at the modular construction site, the structure 30 is sequentially assembled from the bottom floor, and the built-in equipment 6 is placed on each floor. At this time, it is considered that if the SS/CR 50 is located on the bottom floor of the structure module M' under construction cannot be started unless assembly of the SS/CR 50 is completed on the shop floor.

[0052] However, while waiting for the assembly of the SS/CR 50 to be completed, the construction period of the module M may be excessively extended. In view of this, in the module M' under construction shown in FIG. 4A, the construction of the module under construction M' continues, leaving the place where the SS/CR 50 is to be placed. During the indicated period, the workshop conducts a parallel assembly of the SS/CR 50 mounted on the stand 501.

[0053] Then, as shown in FIG. 4B, after the M module is almost complete, the SS/CR 50 assembled in the workshop is brought to the modular site and the SS/CR 50 is built into the layout area under the pipe rack. Thereafter, for example, the pedestal 501 and the structure 30 are connected to each other, whereby the SS/CR 50 is brought into the state mounted in the module M (FIG. 4B).

[0054] In such a case, as described above, after the construction of the LNG plant is completed, a state is obtained in which the power supply device in the SS/CR 50 and the power consuming equipment in the structure 30 are connected to each other by power lines, and the control information output device in the SS/CR 50 and the controller or sensing element of the controlled equipment in the building 30 are connected to each other by signal lines.

At this time, in the M module in the state with the SS/CR 50 installed, when the connection of the power lines and signal lines is also completed, the number of man-hours after the installation of the M module on the construction site can also be significantly reduced.

[0055] In view of this, after the installation of the SS/CR 50 in the building 30, the power supply device (not shown) placed in the SS/CR 50 and the power-consuming equipment located in the same building 30 are connected to each other by power lines 51 and conduct test power up. In FIG. 3, feed line 52 is shown in dotted lines.

[0056] In this case, the module M can accommodate many types of power-consuming equipment with different levels of voltage used. At this time, it is relatively easy to perform an operation of connecting, for example, a power-consuming equipment having a medium or low voltage level of less than 1000 V, to a power supply device, or to test turn on the power-consuming equipment. Thus, said power-consuming equipment is suitable for a connection operation or test switching operation, which is carried out in advance, before the installation of the module M at the construction site.

On the other hand, for power-consuming equipment with a high voltage level of 1000 V or more, it is necessary to use large-sized connectors and test equipment. Thus, such power consuming equipment may not be suitable for a connection operation or power test operation at a modular site.

[0057] In view of this, in module M of this example, if the SS/CR 50 contains a plurality of types of power supply devices differing in voltage level, power-consuming equipment having a voltage level of 1000 V or more may be in a state of not being connected to a power supply corresponding to its voltage level. In the example module M shown in FIG. 3, such a power-consuming equipment corresponds to a large pipe 6a.

At the same time, power-consuming equipment having a voltage level of less than 1000 V is brought into a state of connection to a power supply device corresponding to its voltage level. In the example shown in FIG. 3, each ACHE 41 heat exchanger corresponds to the specified energy consuming equipment.

[0058] In addition, in the modular construction site, if the SS/CR 50 includes a control information output device, the operation of connecting the control information output device to the controlled equipment located in the structure 30 via a signal transmission line can be performed for the control information output device, as well as a test operation of transmitting/receiving a control signal. In FIG. 3, there is no image of the control information output device, the controlled equipment, and the signal transmission line.

[0059] After completion of the operations described above, the module M, containing the SS/CR 50 mounted therein, is transported to the construction site using a transport ship or a truck. The module M is then connected to the foundation pre-installed on the site, and the bottom of the structure 30 and the bottom of the stand 501 SS/CR 50 are attached to the foundation.

[0060] The M module is mounted at a predetermined location. Then, for example, pipes are connected between a plurality of modules M or between a module M and equipment outside the module M, a power line from a power plant or the like is connected to each SS/CR 50 corresponding to a substation, and a signal transmission line is connected between a central control room and each SS/CR 50 corresponding to that instrument control room. Further, in each module M, if the connection between the power-consuming equipment having a high voltage of 1000 V or more and the power supply device corresponding to the specified voltage level has not yet been made, as well as the test supply of voltage, these operations are carried out.

By performing these operations, you can configure the LNG plant.

[0061] The M module in this embodiment has the following effect. In the module M SS/CR 50, which is provided in the structure 30 and contains a power supply device or a control information output device, is located in the area under the pipe rack. When organizing the building by using the space under the pipe rack, the installation area of the M module can be reduced.

[0062] In such a case, the position in which the SS/CR 50 is located is not limited to the lower floor of the structure 30. As long as the SS/CR 50 is placed on the inside of the structure 30, except for its upper surface (the uppermost surface) of the structure 30, the SS /CR 50 can be located at the height of the second floor or higher.

[0063] In addition, a plant that can be built using the aforementioned module M containing SS/CR 50 is not limited to an LNG plant. Such technology is also applicable to a natural gas processing plant capable of separating and separating LNG or gas condensate corresponding to heavy components from natural gas.

List of reference positions

[0064] M, M1, M2 module

30 building

50SS/CR

51 power lines

6 built-in equipment

Claims (10)

1. A module for a natural gas processing plant, comprising: - a structure containing a group of equipment that is part of a natural gas processing plant; And - a building accommodating at least one of a power supply device or a control information output device, wherein the power supply device is provided in the specified structure and is configured to supply power to power-consuming equipment included in the specified equipment group, and the control information output device is included in the specified equipment group and is made with the ability to output information about the operational control of the equipment to be controlled to the controller, configured to implement operational control using a control signal, - at the same time, in the area above the position in which the specified building is located, a pipe rack is provided to hold by its structure a group of pipes through which the movement of the fluid pumped at the natural gas processing plant is provided. 2. The module for the natural gas processing plant of claim 1, wherein if said building has multiple floors, said building is located on the lowest floor. 3. The natural gas processing plant module of claim 1, wherein if said building houses a power supply device, the power supply device is brought into a state of being connected to power consuming equipment located in said structure. 4. The module for the natural gas processing plant according to claim 3, in which, if the building houses a plurality of types of power supply devices differing in voltage level, the power consuming equipment with a voltage level of 1000 V or more is in a state in which it is not connected to power supply device corresponding to the specified voltage level, and power-consuming equipment having a voltage level of less than 1000 V is brought into a state of connection to the power supply device corresponding to the specified voltage level. 5. The module for the natural gas processing plant according to claim 1, wherein if said building houses the control information output device, the control information output device is brought into a state of being connected to the equipment to be controlled located in said building. 6. The module for the natural gas processing plant according to claim 1, wherein said building is connected to an air intake duct for maintaining the internal pressure in the building at a level higher than atmospheric pressure, and the air intake duct has an end part corresponding to the air intake part, the location of which is higher, than the location of equipment for moving combustible materials located in the structure. 7. A module for a natural gas processing plant according to claim 1, wherein said building has an entrance provided to open towards a side face of said structure.

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