Molecular sieve dehydration technology is mainly used in the following fields:
1. Natural gas removes moisture (H2O), supporting pipeline natural gas transmission
2. Natural gas deeply removes water (H2O) and carbon dioxide (CO2), supporting LNG purification device or cryogenic device
3. The synthesis gas deeply removes water (H2O) and carbon dioxide (CO2), and is equipped with a synthetic ammonia device
4. Deep removal of water (H2O) and carbon dioxide (CO2) from syngas, supporting cryogenic separation device
5. Hydrogen or carbon monoxide deeply removes water (H2O) and carbon dioxide (CO2), supporting synthesis device
Features
Plant scale: processing natural gas or syngas 1000~1,000,000m3/h
Dehydration accuracy: water content (H2O) is less than 0.1PPM
Decarburization accuracy: carbon dioxide (CO2) content is less than 1PPM
Working pressure: suitable pressure is 0.5~15MPa
Application areas: natural gas treatment and processing, synthesis gas purification, etc.
Technical characteristics
1. According to user requirements, three process technologies can be provided: reduced pressure heating regeneration, equal pressure heating regeneration and reduced pressure normal temperature regeneration.
2. Unique equal pressure regeneration technology, there is no depressurized regeneration gas, no need to consider the compression or utilization of regeneration gas.
3. According to the scale of the device and the requirements of the regeneration gas flow rate, a combination of 2 to 4 adsorption towers can greatly reduce the regeneration gas flow rate and reduce heat consumption.
4. The unique design of non-disturbance adsorption tower switching mode, the temperature fluctuation of the purified gas is small, and it has no effect on the subsequent cryogenic device.
5. Proprietary adsorbent filling method, with a small amount of liquid in the raw material gas, will not have any influence on the life and use effect of the molecular sieve.
6. The accurately calculated gas flow affects the fluidization of the molecular sieve bed, effectively ensuring the service life of the molecular sieve.
7. The adsorption tower of the high-efficiency air flow distributor can ensure the air flow is more evenly distributed, and the effective utilization rate of the adsorbent reaches more than 98%.
8. With the unique structure of the regeneration gas heater, when the medium pressure steam is used as the heat source, the regeneration gas and the medium pressure steam will not leak or permeate each other through the tube sheet and the tube weld, ensuring the molecular sieve and steam system Safety.
9. The expert self-diagnosis system in the control software package can automatically adjust the system operating parameters in a timely manner according to the changes in the control parameters in the device's purified gas, and optimize the operating conditions without the need for operator adjustment.
Technical Principle
Realize the principle of temperature swing pressure swing adsorption for molecular sieve drying. The temperature swing pressure adsorption technology is based on the adsorption of gas molecules on the surface of the adsorbent, and uses the adsorbent's selective characteristics for different gas components. Some components in the mixed gas are adsorbed at a higher pressure, and the unadsorbed components flow out through the adsorber layer. These adsorbed components are desorbed at a higher temperature and lower pressure in the process for the next adsorption Step, adopt multiple adsorption towers to operate in turn. This cyclic process is the temperature and pressure swing adsorption gas separation process.
1. Removal of water and carbon dioxide by adsorption
The natural gas or synthesis gas passes through the adsorption tower that is in working condition. The water (H2O) and carbon dioxide (CO2) in the natural gas or synthesis gas are retained on the surface of the adsorbent. When the adsorbent is saturated with them, the raw gas is switched to other Adsorption tower. The working time of each adsorption tower is about 8~24 hours.
2. Regeneration of adsorption tower
The adsorption tower that has completed the adsorption work step stops the introduction of natural gas or synthesis gas and switches to the regeneration state. By introducing a small amount of purified gas, the adsorption tower that has completed the adsorption work step is regenerated. There are two main methods of regeneration: pressure reduction and temperature increase. According to the specific conditions, different regeneration processes are used.
