Industry Pain Points

Pipeline Corrosion and Ice Blockage: Residual moisture in pipelines combines with acidic components (e.g., CO₂, H₂S) in natural gas to form acidic condensate, causing internal pipeline corrosion and ice blockage of pressure regulators. This increases annual maintenance costs by over 30%.

Calorific Value Fluctuations and Measurement Disputes: Moisture dilutes the calorific value of natural gas—each 1% volume of moisture reduces the calorific value by 0.5%—triggering calorific value complaints from end-users. Annual losses from measurement disputes exceed 10 million yuan.

Pressure Regulator Failure: In low winter temperatures, condensed water in pipelines freezes and causes frost cracking of regulator diaphragms, leading to gas supply interruptions. The average annual failure rate is ≥15 times per 1,000 km of pipeline.

Limitations of Traditional Dehydration Technologies: Triethylene glycol (TEG) dehydration systems require continuous power supply and pose a risk of benzene-series compound emissions; adsorbent desiccants need frequent replacement (every 6-12 months), resulting in high operation and maintenance (O&M) costs.

System Overview

Through the “gravity separation – pressure energy refrigeration – intelligent adsorption” technology chain, Yipu Urban Pipeline Gas Dehydration System achieves:

• Intrinsic Safety: No electricity or chemicals involved, completely eliminating explosion risks.
• Economic Efficiency: Comprehensive costs over 5 years are 70% lower than TEG systems, with an investment payback period of <1.5 years.
• Digital Empowerment: The AI ice blockage prediction system provides early warnings 72 hours in advance, ensuring winter gas supply.

Technological Evolution:

• Launched a hydrogen-compatible dehydrator in 2024, suitable for future hydrogen-blended pipelines (H₂ ≤20%).
• Developed a pipeline-embedded micro dehydration unit, directly deployable in medium-pressure branch lines.

This solution is a strategic choice for urban gas companies to achieve “zero-corrosion pipelines” and “smart gas”.

Solution Approach

Yipu Urban Pipeline Gas Dehydration Solution

Module	Technical Highlights	Performance Parameters
Pre-Filtration Unit	Sintered metal filter element (5μm) + explosion-proof electric tracing	Particles ≤1mg/m³, adapts to -30℃ low temperature
Condensation Dehydration Module	Pressure energy refrigeration + frequency conversion control, dew point -10℃	Energy consumption: 0kWh, pressure loss ≤0.01MPa
Adsorption Drying Tower	Dual-tower design, molecular sieve service life ≥5 years	Outlet dew point -40℃, adapts to ±5% flow fluctuation
Intelligent Control System	IoT (NB-IoT) remote monitoring, AI predicts ice blockage risks	Fault early warning accuracy ≥95%
Environmental Protection Drainage System	Condensed water with COD ≤30mg/L, directly discharged into municipal pipelines	Complies with GB/T 31962-2015 standard

Applicable Scenarios:

• Dehydration before pressure regulation at urban gate stations
• Regional pipeline network hubs
• Pre-purification at LNG/CNG refueling stations

Technical Principles

Yipu Shale Gas Dehydration Four-Stage Process:

1. Cyclonic Liquid Removal (Stage 1):The axial hypergravity separator removes over 90% of free water within 0.3 seconds, with mineralization resistance up to 50g/L.
2. Precooling and Dehumidification (Stage 2):Adopts ejector refrigeration (driven by wellhead pressure energy) to cool the gas from 45℃ to 10℃ without electricity consumption, reducing the dew point to -5℃.
3. Composite Adsorption (Stage 3):Hydrophobic silica gel-molecular sieve composite bed:

• Silica gel prioritizes the adsorption of organic sulfur (methyl mercaptan removal rate ≥95%)
• Molecular sieve (patented 3A-STM model) achieves deep dehydration to -60℃

4. Intelligent Regeneration (Stage 4):Low-pressure steam (0.8MPa) and shale gas self-circulation regeneration reduce energy consumption by 70% compared with traditional electric heating.

Core Advantage

Advantage	Details
Customized on Demand	Meets special working conditions; provides professional non-standard customization
Low Cost	Adopts cyclic regeneration process; significantly reduces operating costs
High Stability	Dual-tower structure with small pressure fluctuation; low noise and continuous gas supply
Fully Automatic Operation	Easy to operate, reducing labor input; improves efficiency
High Safety	Presets multi-level safety protection measures; supports automatic alarm
Low Failure Rate	Maintains low failure rate after 10,000 hours; high durability with almost no maintenance required

Technical Strength

Leading Adsorption Dehydration Technology

Uses high-performance molecular sieve adsorbents with high water absorption capacity and resistance to corrosion by acidic gases (H₂S/CO₂), ensuring deep dehydration with a dew point ≤-70℃.

The original hot nitrogen regeneration process reduces energy consumption by 30% compared with traditional electric heating regeneration, and integrates a waste heat recovery system to significantly improve energy efficiency.

Modular and Customized Design Capability

Core equipment adopts modular prefabrication, supporting rapid deployment (installation cycle shortened by 50%) and adapting to diverse scenarios such as offshore platforms, onshore gas fields, and LNG pretreatment.

Can customize single-tower, dual-tower, or multi-tower parallel systems according to customer needs, with a treatment capacity ranging from 10,000 to 1,000,000 Nm³/d, flexibly matching gas fields of different scales.

Intelligent Control and Remote Operation & Maintenance

Equipped with a PLC+IoT intelligent control system, it real-time monitors key parameters such as pressure, temperature, and dew point, supporting fault early warning and automatic adjustment.

Through cloud-based big data analysis, it optimizes the adsorption-regeneration cycle, extends the service life of molecular sieves, and reduces O&M costs by 10%-15%.

Energy-Saving and Environmental Protection Technology

Features zero-emission design for regeneration exhaust gas, complying with international environmental standards such as EU CE and US EPA.

Energy consumption is 25%-40% lower than that of traditional triethylene glycol (TEG) dehydration systems, helping customers achieve carbon emission reduction goals.

Long-Cycle Operation Reliability

Molecular sieves adopt anti-pulverization coating technology, with a service life of over 5 years, reducing replacement frequency.

Key components (e.g., valves, instruments) are selected from international first-tier brands (e.g., Siemens, Emerson), with a Mean Time Between Failures (MTBF) of over 100,000 hours.

Strong R&D and Engineering Experience

Possesses more than 19 patents and software copyrights in dehydration technology; the R&D team is led by doctors and has in-depth cooperation with universities and colleges.

Has over 1,000 successful cases worldwide, covering extreme working conditions such as high-sulfur gas fields in the Middle East and low-temperature environments in the Arctic.

Product Advantage Comparison

Indicator	Yipu System	TEG Dehydration	Refrigeration Method	Competitor Adsorption Systems
Dew Point	-40℃ (scalable to -60℃)	-25℃ (requires deep regeneration)	-15℃	-35℃ (2 replacements per year)
Sulfur Resistance	Methyl mercaptan ≤5ppm	Requires pre-installed desulfurization device	Not applicable	Adsorbent service life ≤2 years
Energy Consumption	0kWh (fully pressure energy-driven)	0.15kWh/m³	0.1kWh/m³	0.05kWh/m³
O&M Cost	＜0.01 RMB/m³ (no replacement for 5 years)	0.08 RMB/m³ (TEG + electricity cost)	0.06 RMB/m³ (mainly electricity cost)	0.12 RMB/m³ (consumables)
Environmental Friendliness	Zero chemicals, zero VOCs emissions	Risk of benzene-series compound emissions	Potential refrigerant leakage	Difficult molecular sieve waste disposal
Pressure Adaptability	0.2-1.2MPa without adjustment loss	Requires stable pressure	Requires stable pressure	Optimal at 0.3-0.8MPa

Typical Case

Project Name: Gas Pipeline Network Renovation in a Provincial Capital City in North China

Operating Conditions:

• Treatment Capacity: 500,000 Nm³/day, pressure fluctuating between 0.4-0.7MPa
• Gas Quality: CO₂ 2.5%, H₂S 5ppm, water-saturated

Dehydration Effect:

• Dew point stably reduced from +20℃ to -45℃
• Annual pipeline corrosion rate decreased by 82%, pressure regulator failures reduced to zero

Economic Benefits:

• Reduced annual maintenance costs by 18 million RMB
• Calorific value complaint rate decreased by 95%, recovering 5 million RMB in annual measurement losses