The purpose of this work: to study the preparation of natural gases, consider their purification and drying. The objectives of this work: 1. To study the technological section; 2. Consider drying methods; 3. Disassemble instrumentation and process automation; 4. Study the master plan of the gas dehydration unit; 5. Consider safety and labor protection; 6. Consider the environmental protection section; 7. Analyze the economic section.