Weekly topic on ammonia synthesis production: How to increase the gas delivery capacity of nitrogen and hydrogen compressors as well as the system’s production capacity?

The last edit to this post was made by E Dong Du Lang on 2011-6-5 at 11:48. My personal summary is as follows; please feel free to point out any mistakes: 1. The air delivery capacity of the Roots blower is satisfactory, that is, the inlet pressure of the compressor can be maintained； 2. The cooling capacity of each section of the compressor should be sufficient, including that of the gas washing towers at the various inlet and outlet points of the system ； 3. Ensure that the valves in all sections of the compressor are in good condition; the compressor must not operate with defects ； 4. Eliminate internal and external leaks in the compressor, such as oil discharge leaks, leaks at the first and seventh stages, etc., in order to reduce gas recirculation ； 5. The production system must remain stable to prevent guiding failures caused by minor temperature spikes ； 6. Maintain the reactivity of the synthesis reactions and catalysts; the system pressure should not be too high ； 7. For systems equipped with copper washing systems, the load on copper washing should also be reduced as much as possible to prevent excessive recycled gas from circulating ； 8. Starting from gas generation, reduce the resistance in various systems involved in gas production and increase the gas output volume ； 9. Ensure the quality of the gas, such as the hydrogen-to-nitrogen ratio and carbon monoxide levels; poor quality of the gas only increases unnecessary load on the system.

For high-pressure nitrogen-hydrogen piston compressors, the following points are important: 1. Control of the piston clearance during compressor maintenance; 2. Control of the temperature at each outlet during operation; 3. Control of the compression ratio distribution across different stages; 4. Control of safety valves or other mechanisms to prevent air leakage. It is crucial to monitor the compressor’s operational parameters, as temperatures do not change without reason. If there are changes, their causes must be identified, otherwise it will affect the volume of gas compressed.

The activity of the synthetic catalyst is directly related to the system’s production capacity

The most direct and effective approach is to increase the effective gas components in water gas

Another important issue regarding increasing the compression capacity of compressors is improving the quality of the gas. This includes the control of gas composition; many gases are excess waste gases in the production process. For example, in the production of semi-water gas for synthetic ammonia, controlling the gas composition helps to reduce carbon dioxide levels, which in turn can indirectly increase the volume of gas produced. This is something that many factories tend to overlook.

This post was last edited by hncczydh on 2011-6-7 12:05. Is a hydrogen-nitrogen compressor the same as a syngas compressor? Methods to increase inflation volume: Strictly control process parameters, especially the content of gases with high molecular weight ； Minimize the inlet temperature of each section as much as possible ； Slightly increase the inlet pressure ； Minimize the liquid content at the inlet of each section as much as possible!

Methods to increase the inflation volume: Controlling the hydrogen-to-nitrogen ratio and trace element levels of the fresh syngas

1. Reduce the inlet gas temperature. 2. Improve the compressor’s sealing to minimize leaks. 3. Reduce the inert gas content

In addition to those mentioned above, there is also: 1. Reducing the temperature of the gas entering the compressor. 2. Minimize the resistance to conversion, as well as to desulfurization and decarburization of the converted gas, in order to increase the compression capacity of the compressor.

If it is an operator, it is essential to promptly detect any leaks in the oil-water valve