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Regeneration Gas Reciprocating Compressor for Process Plants

Gas composition (mol%): Regeneration Gas
Flow rate: 2654-3153kg/h(2.3m³/min)
Intake pressure: 2.8-6.2MPa.G
Inlet temperature: 25-50℃
Exhaust pressure: 3.1-6.4MPa.G
Main motor power: 75kW
Overall dimensions of the machine: approximately 3500×3000×1850mm
Whole machine weight: approximately 4T

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Quantity:
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Overview


The DFWD-2.3/(28-62)-(31-64) Regeneration Gas Compressor, a specialized piece of industrial equipment, is tailor-made for the efficient compression and handling of regeneration gas in oil and gas field operations—specifically engineered to meet the demanding working conditions of the Kekeya Gas Field in Xinjiang. Integrating mature reciprocating piston technology with robust structural design, this compressor ensures stable and reliable performance in outdoor open-air installation environments, perfectly adapting to the region’s variable temperature ranges and harsh climatic conditions.



Boasting a nominal volume flow rate of 2.3 m³/min, the compressor operates with an intake pressure range of 2.8-6.2 MPa.G and an exhaust pressure range of 3.1-6.4 MPa.G, making it highly suitable for regeneration gas processing scenarios that require precise pressure control. Powered by a 75 kW main motor (model: YBBP-315M-8, a plateau-adapted motor), it features compact overall dimensions of approximately 3500×3000×1850 mm (subject to actual dimensions) and a total weight of around 4 T. This space-efficient design allows for seamless integration into on-site skid-mounted layouts, eliminating excessive space constraints during installation.



Whether applied in the m

olecular sieve regeneration process of natural




 gas dehydration units, regeneration gas recycling systems in oil and gas field separation facilities, or industrial gas purification support processes, this regeneration gas compressor delivers consistent compression performance. It not only ensures the stability of the regeneration gas system but also contributes to enhancing the overall energy efficiency of the entire gas processing unit.


Features



Excellent Operational Stability & Medium Purity Assurance


The DFWD-2.3/(28-62)-(31-64) Regeneration Gas Compressor is designed with a focus on long-term stable operation and strict protection of medium purity. Its one-stage compression design minimizes pressure loss during the compression process, ensuring efficient gas handling with low energy consumption. Equipped with a Siemens Smart-200 PLC and a 7-inch color touchscreen from Weinview, the unit features a high level of automation—enabling real-time monitoring of key parameters (such as intake/exhaust pressure, oil pressure, and temperature) and automatic alarm and shutdown protection. This significantly reduces manual intervention and operational errors.


Fitted with precision-manufactured components (including 42CrMo hardened piston rods and QT600-3 ductile iron cylinders), the compressor operates with low vibration (meeting GB/T 7777-2003 standards) and low noise (≤85 dB at 1 meter, in line with GB/T 4980-2003 standards), creating a safer and more comfortable on-site working environment. The oil-free lubrication design for the cylinder and packing ensures that lubricating oil does not contaminate the regeneration gas, maintaining the medium’s purity and meeting the strict requirements of gas processing systems.


Rugged Construction & Adaptability to Harsh Environments


This compressor adopts a D-type (symmetrical balance) structure with two rows of cylinders, ensuring balanced operation and reduced mechanical wear during high-pressure compression. The crankcase, crafted from HT250 gray cast iron, serves a dual purpose as a structural support and a lubricating oil reservoir. It is integrated with oil drain valves, oil level observation ports, and bearing seat oil filling ports, facilitating convenient daily inspection and maintenance.



The dual intermediate body design features a space larger than twice the stroke, effectively preventing lubricating oil from the crankcase from entering the cylinder—further safeguarding the regeneration gas from oil contamination. Both the cylinder and cylinder head are made of QT600-3 ductile iron, with axially arranged mesh-structured air valves that optimize gas flow and enhance compression efficiency. This robust construction enables the compressor to withstand extreme temperatures (ranging from -22.7℃ to 39.5℃) and high sandstorm conditions in the Kekeya Gas Field, ensuring long-term durable operation.


Human-Centered Maintenance & System Compatibility


In consideration of on-site maintenance needs, the compressor is equipped with a manual turning device for easy debugging and maintenance operations. Key vulnerable parts (such as piston rings, guide rings, and packing) have a service life of no less than 6000 hours, while core components (including the crankshaft, connecting rod, and crosshead) have a service life of no less than 30000 hours—greatly reducing the frequency of part replacement and maintenance costs.


For system integration, the compressor is designed with skid-mounted installation, integrating all main components and auxiliary systems (such as the lubrication system and instrument system) onto a single base frame for quick on-site installation. The explosion-proof control cabinet is equipped with an RS485 communication interface and adopts the MODBUS-RTU protocol, enabling seamless communication with the user’s DCS system to achieve unattended operation. Additionally, the inlet and outlet connections comply with the HG/T 20592-2009 steel pipe flange standard, ensuring compatibility with on-site process pipelines.


Mature Technical Support & Reliable Quality Assurance


Backed by compliance with multiple national and industrial standards—including API 618-2016 (for reciprocating compressors in oil, chemical, and natural gas industries), GB 150-2011 (for pressure vessels), and GB 50058-2014 (for electrical design in explosive hazardous environments)—the compressor guarantees technical maturity and quality reliability. Key components are sourced from well-known domestic suppliers: for example, the explosion-proof motor is provided by Shanghai Pinxing, the diaphragm coupling by Wuxi Chuangming, and the air valve by Yangzhou Baohua/Shanghai Ruixin—ensuring the overall performance stability of the unit.


The compressor has been fully verified through strict factory inspections, including material performance testing for key parts, non-destructive testing for welds, and pressure tests for pressure-bearing components. This ensures that it meets design requirements before delivery and lays a solid foundation for reliable on-site operation.


Application Area


The DFWD-2.3/(28-62)-(31-64) Regeneration Gas Compressor is specifically developed for the efficient processing and utilization of regeneration gas in oil and gas field-related systems, with core application scenarios including:

  • Natural gas dehydration unit: Used in the molecular sieve regeneration process to compress regeneration gas, ensuring effective regeneration of molecular sieves and maintaining the dehydration efficiency of the unit.

  • Oil and gas field gas separation system: Provides compressed regeneration gas for the regeneration of adsorbents in the gas separation process, ensuring the separation effect of target gases (such as methane, ethane) and improving gas product quality.

  • Industrial gas purification support: Supplies stable-pressure regeneration gas for gas purification equipment (such as filter elements and adsorbers), helping to restore the purification capacity of the equipment and extend its service life.

  • Plateau oil and gas field on-site operations: Adapted to high-altitude environments (1830-1900 m) and large temperature differences, it meets the regeneration gas processing needs of oil and gas fields in plateau regions like the Kekeya Gas Field in Xinjiang.


Highlight Advantages



high efficiency operating Installation honor
Has high efficiency, strong reliability, and high degree of automation; Less vulnerable parts, low vibration, low noise, and easy operation and maintenance The main and auxiliary equipment of the compressor are all installed on the sled, running smoothly and reliably. The overall sled installation is convenient for the transportation and installation of the compressor The entire machine components are carefully designed


Patent Certificates



certificates

A piston rod thread protective sleeve ZL 2017 2 1907021.7


certificates

A piston ring support device ZL 2018 2 0294776.2

certificates

A range piston ZL 2017 2 190177.0 for symmetrical balanced compressors


certificates

Integrated long short double compartment ZL 2018 2 0294762.0


Whole Machine Description


The compressor adopts a D-type (symmetrical balance type), air-cooled, oil-free lubrication, reciprocating piston type, 2-row 1-stage compression, and the entire unit is supplied in a skid-mounted configuration.


The compressor crankcase is made of gray cast iron (material grade: HT250) and is provided with four holes of different diameters for installing crosshead slides, bearings, and bearing seats. The lower part of the crankcase can store lubricating oil to meet the lubrication needs of the compressor; the upper plane of the crankcase is equipped with an interface for installing an oil filler (breathing port) cover plate. In addition, the crankcase is also configured with spare interfaces such as an oil drain port, an oil level gauge observation port, a bearing seat oil filling port, and an interface for installing oil temperature measurement components. The oil drain port of the crankcase has been connected to the outside of the cabinet and is equipped with a manual ball valve, which is specially used for draining oil from the crankcase.


The intermediate body of the compressor adopts a double-intermediate body structure, and the space of the intermediate body is designed to be larger than twice the stroke. This structure can effectively prevent the lubricating oil in the crankcase from flowing into the cylinder, thereby ensuring that the lubricating oil of the compressor will not contaminate the regeneration gas medium. The compressor cylinder is made of ductile iron (material grade: QT600-3) and adopts an oil-free lubrication design, which eliminates the need for oil injection lubrication during operation. The cylinder head is also made of ductile iron (material grade: QT600-3), and the air valves are arranged axially on the cylinder head to ensure smooth gas flow during the compression process.


DFWD-2.3 (28-62)-(31-64)再生气 (16) DFWD-2.3 (28-62)-(31-64)再生气 (7)


The compressor in this picture is a non-standard product. The product provides independent solutions tailored to customers' specific usage requirements (flow rate/purity/pressure, usage environment, main purpose, and customer specific requirements), from design to product customization.


  • Structural form: D-type/M-type/S-type/W-type/V-type/Z-type

  • Cooling method: water cooling/air cooling/mixed cooling

  • Installation form: fixed/mobile/pry mounted/cabin type

  • Drive mode: motor drive/diesel engine start

  • Transportation: sea/air/land

  • Packaging:

    Metal cabin
    Wooden box
    Soundproof cabin
    Metal cabin Wooden box
    Soundproof cabin


Project Case


Ukraine Project Alibek oilfield in Southern Kazakhstan Ningxia Zhongneng new materials engineering
Lanzhou petrochemical company 240000 tonsyear ethylene production capacity restoration - adding butadiene and 1-butene unloading facilities project Alibek oilfield in Southern Kazakhstan Procurement of Molecular Sieve Dehydration, Ethylene Glycol Regeneration and Injection Device, and Fuel Gas Skid in Akimom Gas Field


Technical Parameter



No. Model Medium Flow rate
(Nm3/h)
Exhaust pressure
MPa(G)
Motor power
(kW)
Cooling method Overall dimensions
(mm)
Weights
(kg)
1 DWF-12.4/(9~12)-14 Carbon dioxide 6400 1.4 185 Air-cooled 6000×2700×2200 10000
2 VWF-2.86/5-16 Nitrogen 895 1.6 55 Air-cooled 3200×2200×1750 3500
3 ZWF-0.96/5 Hydrogen chloride 55 0.5 11 Air-cooled 2000×1500×2000 1000
4 DFW-1. 13/0.3-34 Flash Vapour 75 0.03~3.4 18.5 Air-cooled 4500×3200×2150 5600
5 DFW-6.5/(0~0.5)-10 Associated gas 50~100 1 75 Air-cooled 3500×2800×1850 4500
6 DFW-4.2/(0.2~1.5)-12 BOG 260~540 1.2 55 Air-cooled 3500×3000×2000 5500
7 DW-2.45/(6~7)-100 Carbon Monoxide 900 10 160 Mixed cooling 6500×3200×1700 10000
8 DW-19.8/0.5-7.25 Methylene chloride 3.5 0.725 160 Mixed cooling 5200×3000×2350 8000
9 DW-8.6/(0~0.2)-8 Chloromethane 436 0.8 75 Mixed cooling 3200×2400×1600 4500
10 DW-2.4/2.5-11 H elium Recovery Ga 450 1.1 37 Mixed cooling 3000×2500×1800 3000
11 DW-14/(0~0.2)-25 Raw material gas 800 2.5 160 Water-cooled 4800×3200×1915 10000
12 VW-8/18 Vinylidene fluoride 418 1.8 75 Water-cooled 3700×2000×1700 4500
13 VWD-3.2/(0~0.2)-40 Biogas 230 4.0 45 Water-cooled 6000×2500×2650 8000
14 VW-9/6 Ethyl chloride 470 0.6 55 Water-cooled 2800×1720×1700 3500
15 DW-2.4/(18~25)-50 Raw material gas 2900 5.0 160 Water-cooled 4300×3000×1540 4500
16 VW-5.6/(0~6)-6 Isobutylene 1650 0.6 45 Water-cooled 2900×1900×1600 3500
17 VW-3.8/3.5 Mixed gases 200 0.35 18.5 Water-cooled 2200×1945×1600 2000
18 ZW-1.7/3.5 Vinyl chloride 100 0.35 15 Water-cooled 2700×1600×2068 2000
19 VW-0.85/(0~14)-40 Refrigerant 300 4.0 55 Water-cooled 4500×2300×1780 5500
20 DW-3.78/(8~13)-(16~24) Ammonia 2700 1.6~2.4 75 Water-cooled 3200×2000×1700 3500
21 DW-5/7 Chloromethane 355 0.7 37 Water-cooled 3500×2600×1700 4000
22 DW-9.2/3 on-condensable gas 653 0.3 45 Water-cooled 3500×3200×1680 6800
23 DW- 16/(2.8~3.2)-7.6 Carbon rich gas 3000~3400 0.76 132 Water-cooled 4500×3400×2750 12000
24 DWD-2.9/20-50 Wellhead gas 3334 2.0~5.0 185 Water-cooled 6000×3500×3000 14000
25 DW-4/0.5-4 -pentadiene, nitroge 300 0.4 30 Water-cooled 3000×2800×1700 3500
26 DW-8.7/0.02-15 Tail gas 500 1.5 90 Water-cooled 4500×3000×1800 10000
27 DW-8.8/0.2-6 Desorption gas 450 0.6 75 Water-cooled 4000×3000×2150 8000
28 DW-1.3/0.2-18 Metafluoroethylene 80 1.8 18.5 Water-cooled 3500×2500×1570 3500
29 DW-12.5/(0. 1~0. 15)-18 uoromonochloroeth 887 1.8 132 Water-cooled 5500×3200×2500 14000
30 DW-2.9/5 Gas 206 0.5 22 Water-cooled 3200×2800×1800 3000


Project Case


Ukraine Project Alibek oilfield in Southern Kazakhstan Ningxia Zhongneng new materials engineering
Beijing Hongke Qingneng Technology Co., Ltd. associated gas compressor for Shanxi Yan'an 60000 m3 project Lanzhou petrochemical company 240000 tonsyear ethylene production capacity restoration - adding butadiene and 1-butene unloading facilities project Ningxia Zhongneng new materials engineering


FAQ


What gas is the DFWD-2.3/(28-62)-(31-64) Compressor designed to handle?

It is specifically engineered for regeneration gas (with detailed components including C1: 68.18-81.18mol%, C2: 7.86-9.36mol%, C3: 2.44-2.90mol%, N2: 3.68-19.08mol%, and trace amounts of CO2 and H2O at 0.01mol% each), which is tailored to the regeneration gas processing needs of oil and gas field systems (e.g., Kekeya Gas Field in Xinjiang).


What is the intake pressure range of this compressor?

It operates with an intake pressure range of 2.8-6.2 MPa.G; under different working conditions, the maximum intake pressure is 6.2 MPa.G (for Working Conditions 2 and 3) and the minimum intake pressure is 3 MPa.G (for all working conditions), ensuring adaptability to variable on-site pressure conditions.


What cooling method does the DFWD-2.3/(28-62)-(31-64) Compressor use?

The compressor adopts an air-cooled design for both its cylinder and packing; the lubrication system also uses an air-cooled oil cooler to maintain the oil supply temperature at ≤55℃. This air-cooled configuration eliminates the need for a water cooling system, making it suitable for outdoor open-air installation in water-scarce or cold plateau areas.

What protection levels do the main motor and control cabinet have?

The main motor (model: YBBP-315M-8, a plateau-adapted motor) has an explosion-proof grade of ExdIIBT4 and a protection grade of IP65; the control cabinet is of explosion-proof type (matching the motor’s explosion-proof grade) with an IP65 protection grade, ensuring safe operation in explosive and dusty outdoor environments of oil and gas fields.


Does the compressor support communication with a user’s DCS system?

Yes, the explosion-proof control cabinet is equipped with an RS485 communication interface and adopts the MODBUS-RTU communication protocol, which can seamlessly connect to the user’s DCS system. This enables remote monitoring of operating parameters (e.g., intake/exhaust pressure, temperature) and remote control, realizing unattended operation of the unit.



What is the service life of key components of this compressor?

Vulnerable parts (such as piston rings, guide rings, and packing) have a service life of no less than 6,000 hours, while core components (including the crankshaft, connecting rod, crosshead, and piston) have a service life of no less than 30,000 hours—greatly reducing the frequency of component replacement and long-term maintenance costs.



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+86 13955206799

Landline

+86-552-4190082

Address

No. 66 Jinhe Road, Huaiyuan Economic Development Zone, Bengbu City

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