Modularized compact micro-positive pressure natural gas reciprocating compressor unit

Abstract

The utility model discloses a modular compact micro-positive pressure natural gas reciprocating compressor unit which comprises a main engine skid and an auxiliary engine, and the main engine skid comprises a compressor; the auxiliary machine comprises a gas inlet cooler, a gas inlet washer, a gas outlet cooler and a process gas buffer, the gas inlet end and the gas outlet end of the gas inlet washer are connected with the gas outlet end of the gas inlet cooler and the gas inlet end of the compressor respectively, and the gas inlet end and the gas outlet end of the gas outlet cooler are connected with the gas outlet end of the compressor and the gas inlet end of the process gas buffer respectively; and the air inlet cooler, the air inlet scrubber, the air outlet cooler and / or the process air buffer are arranged in a modular plug-in form. According to the utility model, through reasonable layout, the existing resources on site are utilized, and the resources lacked on site are supplemented by adopting modular equipment, so that the resource utilization is reduced, the engineering investment is reduced, and the occupied space is reduced; through the modular design of the auxiliary machine, the auxiliary machine can be conveniently transported to an offshore platform after being built from a land factory, the hoisting difficulty is reduced, and the installation difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas compressor boosting, in particular to a modular compact micro-positive pressure natural gas reciprocating compressor unit. Background Art

[0002] The compressor unit pressurizes the natural gas through the reciprocating operation of the compressor piston, so that the natural gas can be transported to the land or enter the gas generator set for combustion and power generation. At present, making full use of the oil and gas resources of offshore platforms has become an important strategic measure for the transition to a clean society. The complex working conditions of offshore platforms such as salt spray, seawater, wind load, earthquake load, extreme weather and the requirements for installation space require the compressor unit to be arranged more compactly.

[0003] Specifically, in order to protect the cylinder and piston, conventional compressor skids need to be equipped with many devices, resulting in a large number of compressor devices and a large skid size. It is difficult to find a place to arrange the compressor during on-site modification. At the same time, since the compressor head is close to the scrubber, the pulsation buffering of natural gas is small, and more pipe supports and more reinforcement measures need to be added to the scrubber, which further increases the weight of the compressor skid. If the above problems cannot be solved, it will lead to the inability to fully utilize small-flow associated gas during the platform production process. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a compact micro-positive pressure natural gas reciprocating compressor unit. By utilizing the existing equipment and idle narrow space of the platform, the compressor unit is arranged more compactly and weighs less. The compressor unit can be more widely used in offshore platforms, thereby reducing the weight of the platform or dismantling old production equipment in order to install the compressor unit.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] A modular compact micro-positive pressure natural gas reciprocating compressor unit, comprising:

[0007] A main engine skid, wherein the main engine skid comprises a compressor;

[0008] Auxiliary machine, the auxiliary machine includes an intake air cooler, an intake air scrubber, an outlet air cooler and a process gas buffer, the intake end and the outlet end of the intake air scrubber are respectively connected to the outlet end of the intake air cooler and the intake end of the compressor, the intake end and the outlet end of the outlet air cooler are respectively connected to the outlet end of the compressor and the intake end of the process gas buffer, the intake air cooler, the intake air scrubber, the outlet air cooler and / or the process gas buffer are all arranged in a modular plug-in form.

[0009] Furthermore, the intake air cooler adopts a plurality of intake air coolers or intake air liquid coolers.

[0010] Furthermore, the outlet air cooler adopts a plurality of process gas inter-stage air coolers or process gas inter-stage liquid coolers.

[0011] Furthermore, the air intake scrubber adopts a plurality of inlet scrubbing tanks.

[0012] Furthermore, the auxiliary machines are connected in a modular manner to form an integrated unit or adopt a split layout.

[0013] Furthermore, the main engine also includes a lubricating oil internal circulation system, and the auxiliary engine also includes a lubricating oil air cooler, the liquid inlet and liquid outlet of the lubricating oil air cooler are respectively connected to the liquid outlet of the compressor and the liquid inlet of the lubricating oil internal circulation system, and the liquid outlet of the lubricating oil internal circulation system is connected to the liquid inlet of the compressor.

[0014] In summary, the technical effects and advantages of the utility model are as follows: the utility model reduces resource utilization, reduces project investment, and reduces floor space by making reasonable layout and utilizing existing resources on site, and adopts modular equipment to supplement the resources lacking on site; the utility model avoids vibration by eliminating air flow pulsation at the compressor outlet, thereby avoiding the need to strengthen the platform structure in order to prevent vibration; the utility model facilitates the transportation of auxiliary machines from land factories to offshore platforms and reduces the difficulty of hoisting and installation through modular design of auxiliary machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a structural schematic diagram of a modularized compact micro-positive pressure natural gas reciprocating compressor unit corresponding to an air cooling process in one embodiment of the utility model;

[0017] Figure 2 It is a structural schematic diagram of a modularized compact micro-positive pressure natural gas reciprocating compressor unit corresponding to a liquid cooling process in one embodiment of the utility model;

[0018] Figure 3 This is a layout plan of the host in one embodiment of the utility model.

[0019] Among them: 1. Compressor head; 2. Motor; 3. Lubricating oil internal circulation system; 4. Main control system; 5. Intake air cooler; 6. Intake liquid cooler; 7. Intake scrubber; 8. Process gas interstage air cooler; 9. Process gas interstage liquid cooler; 10. Lubricating oil air cooler; 11. Process gas buffer; 12. Auxiliary machine control module. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] This embodiment provides a modular compact micro-positive pressure natural gas reciprocating compressor unit, such as Figure 1-Figure 3 As shown, it includes a main machine skid and auxiliary machines. The main machine skid of this embodiment only includes a compressor, a lubricating oil internal circulation system 3 and a main control system 4. The compressor includes a compressor head 1 and a motor 2. The compressor head 1 is driven by the motor 2. The lubricating oil internal circulation system 3 is used for the circulation of lubricating oil in the compressor head 1. The main control system 4 is used to control the actions of the compressor and the lubricating oil internal circulation system 3. The compressor, the lubricating oil internal circulation system and the main control system constitute the main machine; the auxiliary machines are other equipment and supporting equipment, instruments, pipelines, valves, etc. The auxiliary machines are separated from the main machine skid to reduce the size and weight of the main machine skid.

[0023] The auxiliary machine includes an intake air cooler, an intake air scrubber 7, an outlet air cooler and a process gas buffer 11. The intake end and outlet end of the intake air scrubber 7 are respectively connected to the outlet end of the intake air cooler and the intake end of the compressor. The intake end and outlet end of the outlet air cooler are respectively connected to the outlet end of the compressor and the intake end of the process gas buffer 11. The intake air cooler, intake air scrubber 7, outlet air cooler and / or process gas buffer 11 are all arranged in a modular plug-in form. The process gas buffer 11 can eliminate the air flow pulsation at the outlet of the compressor and avoid vibration.

[0024] In this embodiment, except for the main engine, all auxiliary machines can be connected in a modular plug-in form. The auxiliary machine configuration can be flexibly matched and optimized according to the on-site gas quality conditions and by making full use of on-site processing facilities and resources. For example, if the on-site intake air temperature is low, there is no need to add an intake air cooler; if there are intake air washing equipment resources on site, there is no need to add an intake air scrubber 7; if there are no cooling water resources on site, an air cooler configuration is used; if there is a slugging condition on the on-site intake, a process gas buffer 11 is added, etc. The following is only one option of this modular equipment, and any combination is protected by this utility model.

[0025] Optionally, the intake air cooler adopts a plurality of intake air coolers 5 or intake air liquid coolers 6. Figure 1 As shown, for the air cooling process, the intake air cooler uses a plurality of intake air coolers 5; Figure 2 As shown, for the liquid cooling process, the intake air cooler uses a plurality of intake air liquid coolers 6.

[0026] Optionally, the outlet air cooler adopts a plurality of process gas inter-stage air coolers 8 or process gas inter-stage liquid coolers 9. Figure 1 As shown, for the air cooling process, the outlet air cooler uses several process gas inter-stage air coolers 8; Figure 2 As shown, for the liquid cooling process, the outlet gas cooler uses a plurality of process gas inter-stage liquid coolers 9.

[0027] Furthermore, the air intake scrubber 7 uses a plurality of inlet scrubbing tanks.

[0028] Furthermore, the auxiliary machine adopts modular connection to form an integrated unit or a split layout. Each device in the auxiliary machine is plugged in as an integrated unit or each device is plugged in as a split unit, which is convenient for disassembly and transportation. The auxiliary machine can be modularly connected to form an integrated unit, or it can be arranged in a split manner according to the on-site space layout and restrictions, effectively utilizing the on-site space, and conveniently combining the on-site working conditions and crane capacity to achieve modular split transportation, relocation, reorganization and reuse. It is suitable for application in scenarios such as offshore platforms, gas wells in remote mountainous areas, small marginal oil and gas fields, etc. where there are space restrictions or inconveniences in transportation and production or repeated relocation and utilization.

[0029] Furthermore, the main engine also includes a lubricating oil internal circulation system 3, and the auxiliary engine also includes a lubricating oil air cooler 10, the liquid inlet and liquid outlet of the lubricating oil air cooler 10 are respectively connected to the liquid outlet of the compressor and the liquid inlet of the lubricating oil internal circulation system 3, and the liquid outlet of the lubricating oil internal circulation system 3 is connected to the liquid inlet of the compressor. The lubricating oil internal circulation system 3 is connected to the lubricating oil air cooler 10 to cool the lubricating oil to ensure the normal operation of the compressor main engine.

[0030] by Figure 1 The air cooling process is briefly described.

[0031] The compressor head 1 is driven by a motor 2, and a lubricating oil internal circulation system 3 and a main control system 4 are arranged in the compressor head 1. The platform natural gas passes through the intake air cooler 5, enters the intake scrubber 7, and then enters the compressor head 1. After the compressor head 1 is driven by the motor 2, the natural gas is compressed, enters the process gas interstage air cooler 8, and then enters the process gas buffer 11 for utilization or pipeline transportation.

[0032] Figure 2 exist Figure 1 Based on the liquid cooling process flow, the air inlet air cooler 5 is replaced with the air inlet liquid cooler 6, and the process gas stage air cooler 8 is replaced with the process gas stage liquid cooler 9. The air inlet air cooler 5 and the air inlet liquid cooler 6 can be replaced arbitrarily, and the process gas stage air cooler 8 and the process gas stage liquid cooler 9 can be replaced arbitrarily.

[0033] The auxiliary control module 12 is set to transmit the auxiliary control signal to the main control system 4 for control. The auxiliary control module 12 can identify the control of any module. For each additional auxiliary device, the local control program of the auxiliary device can be added to the main control system 4 in the form of a packaged program to form a complete control system. In this embodiment, each device belongs to an existing product, and the device control also belongs to the existing technology, which will not be repeated here; the main and auxiliary devices have serialized products and standardized specifications according to the gas processing capacity, which can realize the standardized replacement of spare parts.

[0034] In this embodiment, except for the compressor head 1, motor 2, lubricating oil internal circulation system 3 and main control system 4 of the main machine, any equipment of other auxiliary machines can be increased or decreased according to the site conditions and arranged arbitrarily, which greatly increases the utilization rate of small space. For example, the abundant resources on site are used for configuration to ensure that the main configuration of the compressor is complete, and the lack of resources is supplemented by modular devices to ensure the stable operation of the compressor. According to the abundant processing capacity of the existing imported scrubber on site, the idle processing capacity is used to separate the liquid at the compressor inlet, and the liquid enters the compressor head 1 after separation. According to the abundant processing capacity of the existing cooler on site, the idle cooling capacity is used to cool the high-temperature natural gas at the compressor outlet, and the liquid enters the outlet scrubber after cooling. The outlet scrubber can be set between the outlet cooler and the process gas buffer 11. According to the abundant processing capacity of the existing outlet scrubber on site, the idle processing capacity is used to separate the liquid at the compressor outlet and output it to the next process equipment. Through pulsation and torsional vibration analysis, the vibration of the unit is reduced, and the reinforcement of the pipeline support and platform structure is reduced, and the weight of the skid is reduced.

[0035] In summary, this embodiment uses reasonable layout, utilizes existing resources on site, and adopts modular equipment to make up for the lack of resources on site, thereby reducing resource utilization, reducing project investment, and reducing floor space; the utility model eliminates air flow pulsation at the compressor outlet to avoid vibration, thereby avoiding the need to strengthen the platform structure to prevent vibration; the utility model uses modular design of auxiliary machines to facilitate transportation from land factories to offshore platforms and reduce the difficulty of lifting and installation.

[0036] For ease of description, spatially relative terms such as "upper", "lower", "outer layer", "inner layer" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that in addition to the orientation shown in the figures, the spatial terms are intended to include different orientations of the device in use or operation. Therefore, the exemplary term "lower" can include both upper and lower orientations.

[0037] Furthermore, relational terms such as "3" and "4" etc. are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0038] Although the preferred implementation cases of the utility model have been described above in conjunction with the accompanying drawings, the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the utility model, ordinary technicians in this field can also make many forms of specific changes without departing from the scope of protection of the utility model and the claims, which all fall within the scope of protection of the utility model.

Claims

1. A modular, compact, slightly positive pressure natural gas reciprocating compressor unit, characterized in that: include: A main engine skid, wherein the main engine skid comprises a compressor; Auxiliary machine, the auxiliary machine includes an intake air cooler, an intake air scrubber, an outlet air cooler and a process gas buffer, the intake end and the outlet end of the intake air scrubber are respectively connected to the outlet end of the intake air cooler and the intake end of the compressor, the intake end and the outlet end of the outlet air cooler are respectively connected to the outlet end of the compressor and the intake end of the process gas buffer, the intake air cooler, the intake air scrubber, the outlet air cooler and / or the process gas buffer are all arranged in a modular plug-in form.

2. A modularized, compact, slightly positive pressure natural gas reciprocating compressor unit according to claim 1, characterized in that: The intake air cooler adopts a plurality of intake air coolers or intake air liquid coolers.

3. A modularized, compact, slightly positive pressure natural gas reciprocating compressor unit according to claim 1, characterized in that: The outlet air cooler adopts a plurality of process gas inter-stage air coolers or process gas inter-stage liquid coolers.

4. A modularized, compact, slightly positive pressure natural gas reciprocating compressor unit according to claim 1, characterized in that: The air intake scrubber adopts a plurality of inlet scrubbing tanks.

5. The modularized compact slightly positive pressure natural gas reciprocating compressor unit according to claim 1, characterized in that: The auxiliary machines are connected in a modular manner to form an integrated unit or adopt a split layout.

6. A modularized, compact, slightly positive pressure natural gas reciprocating compressor unit according to claim 1, characterized in that: The main engine also includes a lubricating oil internal circulation system, and the auxiliary engine also includes a lubricating oil air cooler. The liquid inlet and liquid outlet of the lubricating oil air cooler are respectively connected to the liquid outlet of the compressor and the liquid inlet of the lubricating oil internal circulation system, and the liquid outlet of the lubricating oil internal circulation system is connected to the liquid inlet of the compressor.

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