Ammonia synthesis system and method

An ammonia synthesis system comprising:

• an ammonia synthesis reactor;
• an integrated waste heat boiler;
• a supply water heat exchanger;
• a recycle gas heat exchanger;
• a water cooler;
• an integrated ammonia chiller and refrigeration exchanger;
• a secondary ammonia chiller;
• an ammonia separator;
• a liquid ammonia tank;
• a recycle compressor and
• a start-up heater;
• and wherein,
• a process gas is heated in the recycle gas heat exchanger and enters the ammonia synthesis reactor and the integrated waste heat boiler,
• a reacted gas stream exits from a bottom of the integrated waste heat boiler and is cooled in the supply water heat exchanger,
• a gas stream enters the recycle gas heat exchanger, the water cooler, the integrated ammonia chiller and refrigeration exchanger, the secondary ammonia chiller, and is cooled,
• the gas stream enters the ammonia separator to form a separated liquid ammonia,
• the separated liquid ammonia enters the liquid ammonia tank, and
• a cooled gas stream enters the integrated ammonia chiller and refrigeration exchanger for pressurization as recycle gas.