What is the use of process compressed air in chemical synthesis?

In the process of chemical synthesis, process compressed air plays a vital role, and its application runs through many key links. The specific functions are as follows:

1. Chemical Reactions and Synthesis

1. provide oxidant: Oxygen in compressed air is an important oxidant for many chemical reactions. For example, in the fuel combustion process, oxygen as an oxidant participates in the combustion reaction to generate heat energy. In addition, oxygen also plays a key role in the production of metal oxides such as copper oxide and zinc oxide.
2. promote synthetic reaction in the process of ammonia synthesis, methanol synthesis, petroleum cracking and other important chemical synthesis, compressed air (or oxygen) is an indispensable raw material or reaction condition. These reactions usually need to be carried out at a specific pressure and temperature, and compressed air provides the necessary reaction environment.

2. gas separation and purification

1. molecular sieve adsorption technology: The use of compressed air can realize molecular sieve adsorption technology to separate high-purity methane and other useful components from natural gas and other gas mixtures.
2. Air separation: Through the selective adsorption capacity of molecular sieve, compressed air can also be used for air separation to extract high-purity oxygen and nitrogen to meet the specific needs of chemical production.

3. drive and control system

1. drive pneumatic equipment compressed air is an important power source for driving pneumatic pumps, pneumatic actuators, pneumatic valves and other equipment. These devices are widely used in chemical production in fluid transportation, material handling, valve control and other scenarios.
2. Precise control: The compressed air-driven system has the advantages of fast start and stop, and is suitable for the situation of complex process requirements, high flexibility and adjustability. For example, in the catalytic cracking unit, the pneumatic control valve relies on clean compressed air to achieve precise opening control to ensure the stability of the reaction temperature.
3. Automated process compressed air is also used to control instruments and operation panels to monitor and adjust process parameters and promote the automation process of chemical production.

4. Pneumatic Tools and Equipment Power

1. improve work efficiency in the chemical process, many installation, maintenance and production operations require the use of pneumatic tools and equipment, such as pneumatic drills, pneumatic grinders, pneumatic wrenches and pneumatic spray guns. Compressed air provides the required air pressure and power output for these tools and equipment, improving work efficiency and reducing labor intensity.

5. High Pressure Gas Storage and Transportation

1. storage medium: Compressed air can be used as a storage medium for high-pressure gas. The gas is compressed to the required pressure by a compressor and stored for subsequent use.
2. Delivery gas in chemical production, some processes require the use of high-pressure gases, such as oxygen, nitrogen and hydrogen. Compressed air can be used as the transmission medium of these high-pressure gases and transported to the production process through pipelines, which improves the storage density of the gas and facilitates the flow and use of the gas.

6. Fluidized Bed Reaction and Pneumatic Conveying

1. fluidized bed reaction: In the fluidized bed reactor, compressed air forms a uniform gas-solid mixing system, so that the catalyst particles are uniformly suspended and participate in the reaction. This helps to improve reaction efficiency and product quality.
2. pneumatic conveying: Compressed air is also used in pneumatic conveying systems to convey powdery raw materials or products with high-speed airflow. This conveying method not only ensures that the material has no residue but also avoids pipe wear, improves the conveying efficiency and reduces the maintenance cost.

7. Safety Protection and Emergency Response

1. emergency shutdown system in chemical production, emergency shutdown system is an important facility to ensure production safety. Compressed air is used to drive the instrument air storage tank of the emergency shutdown system to ensure rapid response and shutdown operation of the system in an emergency.
2. positive pressure respirator in toxic work areas, positive pressure respirators rely on compressed air to provide clean breathing air to protect the lives of workers.

Maintenance and maintenance of 8. equipment

1. cleaning medium: Compressed air is used as a cleaning medium for heat exchanger tube bundle cleaning operations and other scenarios to effectively remove coking and other impurities and maintain the good operating condition of the equipment.
2. Tightness test: In the process of equipment maintenance and maintenance, compressed air is also used for air tightness test and other testing work to ensure the sealing performance and safety of the equipment.

9. material storage and transportation

1. maintain micro-positive pressure environment during the material storage process, compressed air is used to maintain the micro-positive pressure environment of the storage tank, isolate oxygen contact, and prevent material oxidation or deterioration.
2. quantitative transfer: The pneumatic conveying pump uses intermittent pulses of compressed air to realize the quantitative transfer of high-viscosity materials, which improves the accuracy and efficiency of material transfer.

10. environmental control

1. exhaust gas treatment compressed air drives the pulse blowback device of the exhaust gas treatment unit to regularly remove the dust on the filter bag and maintain the smooth and efficient operation of the exhaust gas treatment system.
2. Sewage treatment: In the sewage treatment unit, compressed air is released into the sewage through the microporous diffuser to provide the oxygen required for the biochemical reaction and improve the efficiency of biochemical treatment.

XI. Optimization of energy efficiency

1. waste heat recovery: By installing a waste heat recovery device, the compressed air waste heat in the chemical production process can be effectively utilized for preheating process water or other purposes, reducing energy consumption.
2. intelligent control the intelligent control system automatically adjusts the number of compressors in operation according to the gas load, so that the load rate of the equipment is always kept in the high efficiency range, and the energy utilization efficiency is improved.