In the field of industrial gas deep drying, achieving high efficiency, energy saving, and near-zero emissions is the core goal that the industry continuously pursues. Recently, our company successfully delivered a customized solution for a Chinese military project—a 66,700 Nm³/h R134a zero-gas-consumption closed-loop heating regeneration dehydration unit. This unit, with its innovative system design and reliable operating performance, has achieved a major breakthrough in the deep drying of heavy gas injection and recovery systems (such as R134a).

Core Breakthrough, Unlocking a New Paradigm of Energy Saving

Traditional drying equipment usually consumes a large amount of drying gas for purging during the adsorbent regeneration stage, accompanied by waste gas emissions, resulting in high energy consumption and material loss. The core advantage of this unit lies in its “Zero-Gas-Consumption Closed-Loop Regeneration” technology. Its core design lies in: Using a single heating heat exchanger to continuously provide regeneration heat sources for two (four-tower) TSA/PTSA adsorption dehydration units .

1. Significantly Reduce Installed Power: Compared to independent regeneration systems, the number of heating devices is reduced, effectively reducing the total power demand of the system, which is beneficial for stable operation of the factory power grid and regional grid load regulation.

2. Optimize System Control: The integrated design reduces a set of independent regeneration control systems, improving the overall integrity and coordination of the system.

3. Eliminate Material Loss and Emissions: The closed-loop design ensures that no process gas is discharged during the regeneration process, achieving zero loss of materials (R134a) while meeting strict environmental protection requirements.

Performance Parameters, Precisely Matched to Multiple Operating Conditions

The unit design fully considers the flexibility of actual operation:

1. Multi-Operating Condition Coverage: The design processing capacity covers two typical operating conditions:

• Operating Condition 1: Processing capacity 66,700 Nm³/h, gas composition: 98% R134a + 2% air, inlet moisture content ≤ 0.25% (volume fraction).

• Operating Condition 2: Processing capacity 15,000 Nm³/h, gas composition: 20% R134a + 80% air, inlet moisture content ≤ 1.14% (volume fraction).

2. High Operating Flexibility: The unit can operate stably within 30%-100% of the design load range, effectively adapting to upstream gas source fluctuations.

3. Deep Drying Output: Under the above two inlet moisture conditions, the unit can stably output atmospheric dew point ≤ -60℃ of dried gas, meeting the stringent requirements of the military and high-end industrial fields for deep gas drying.

Customized Design and Reliable Assurance

The long-term stable operation of the unit stems from careful design and material selection:

1. Dedicated Adsorbent: R134a dedicated molecular sieve is used, its adsorption efficiency is increased by about 30% compared to ordinary molecular sieves, extending the service life and reducing the replacement frequency and maintenance costs.

2. High-Quality Core Equipment: Key equipment (such as heat exchangers, containers, valves) uses industry-leading brands to ensure excellent corrosion resistance and sealing performance , adapting to the characteristics of the R134a medium.

3. High-Response Switching System: Using high-performance pneumatic valves and precision flow control valves to form an adsorption/regeneration switching system, with rapid response, high sealing level, and ensuring long-term leak-free operation.

4. Intelligent Dew Point Energy-Saving Control: Equipped with a fully intelligent dew point energy-saving control system , realizing dynamic optimization of operating parameters:

• Using the outlet gas dew point as the core control index. When the dew point is better than the set value, the system automatically extends the adsorption cycle, reducing unnecessary regeneration times.

• The regeneration process is based on the regeneration exhaust gas temperature curve to precisely control the time and energy input of the heating and cold blowing stages.

• Actual operation shows that this intelligent control system can effectively reduce regeneration energy consumption, further reducing it by 10%-15% 。

Promoting Green Industry, Adapting to Multiple Scenarios

This unit's “zero-gas-consumption closed-loop regeneration”, “deep drying”, “intelligent control” and other core technologies not only perfectly meet the needs of the R134a heavy gas injection and recovery system, but its design concept and technological advantages can also be extended to chemical, energy (such as natural gas, hydrogen dehydration), electronic semiconductors (special gas treatment), and other fields with extremely high requirements for gas drying depth, energy efficiency, and environmental protection.

Our company will continue to cultivate gas dehydration and purification technologies, driven by innovation, to provide more efficient, reliable, and green customized solutions for customers in various industries, contributing to industrial green and low-carbon upgrades.