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[Chemical Knowledge]：Manufacturing method and process of liquid ammonia

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The manufacturing method
of liquid ammonia
1. overview

liquid ammonia is an important inorganic chemicals, widely used in agriculture, medicine, energy, electronics and other fields. Its manufacturing method mainly includes ammonia synthesis method, electrolytic water method and so on. This paper will introduce in detail the process principle, process, advantages and disadvantages and application of ammonia synthesis method to manufacture liquid ammonia.

2. process principle

ammonia synthesis method is based on nitrogen and hydrogen as raw materials, under the action of high temperature, high pressure and catalyst, synthesis reaction, generating ammonia. The reaction equation is: N2 3H2 and 2NH3. This reaction is a reversible reaction, and it is necessary to control the reaction conditions so that the reaction proceeds in the direction of generating ammonia gas.

3. manufacturing process

1. raw material gas preparation: nitrogen and hydrogen are mixed in a certain proportion to prepare raw material gas.
2. Compression: Compress the feed gas to a certain pressure to increase the reaction rate.
3. Preheating: Preheat the compressed feed gas to a certain temperature to activate the catalyst.
4. synthesis: under the action of high temperature, high pressure and catalyst, the raw material gas is synthesized to generate ammonia.
5. Cooling: The reacted gas is cooled to condense ammonia into liquid.
6. Separation: The liquid ammonia is separated from the unreacted raw material gas to obtain pure liquid ammonia. Analysis of the advantages and disadvantages of

4.
the advantages of
ammonia synthesis method for manufacturing liquid ammonia are: raw materials are readily available, the production cost is relatively low; The product has high purity and good quality; The production process is mature and the operation is simple. Disadvantages are: high energy consumption, the production process needs to consume a lot of energy; equipment investment is large, the need for high temperature, high pressure equipment.

5. Application Case
A chemical plant in
uses ammonia synthesis to produce liquid ammonia, with an annual production capacity of 100000 tons. In the production process, by optimizing the process, improve the degree of automation of equipment, reduce production costs, improve production efficiency. At the same time, strengthen the safety management in the production process to ensure the smooth progress of the production process. The liquid ammonia produced by the plant has stable quality and high purity, and is widely used in agriculture, medicine, energy and other fields, and has achieved good economic and social benefits.

6. safety production and environmental protection requirements

1. Safety production: In the production process, the safety operation procedures should be strictly observed to ensure the normal operation of the equipment. At the same time, staff safety training should be strengthened to improve safety awareness and prevent safety accidents.
2. Environmental requirements: Liquid ammonia production process will produce a certain amount of waste gas, waste water and solid waste. Therefore, effective measures should be taken to control and ensure the discharge standard. At the same time, we should actively promote green production technology, reduce energy consumption and resource consumption, and improve environmental protection.

7. market prospects and development direction

With the continuous development of science and technology, liquid ammonia manufacturing technology will continue to progress, production costs will be further reduced. At the same time, as the application of liquid ammonia in various fields continues to expand, its market demand will continue to increase. Therefore, the market prospect of liquid ammonia is broad. In the future, the development direction of liquid ammonia manufacturing technology will mainly focus on improving production efficiency, reducing energy consumption, and improving product purity. At the same time, with the continuous improvement of environmental protection requirements, green production process will become the development trend of liquid ammonia manufacturing technology in the future.

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