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Reduction and passivation system for ammonia synthesis catalyst, and method thereof

A technology for catalyst and ammonia synthesis, which is applied in chemical instruments and methods, catalyst protection, physical/chemical process catalysts, etc. It can solve the problems of complex treatment process and low gas recycling rate, and achieve the effect of simple process and improved production efficiency

Active Publication Date: 2015-07-22
LIAOCHENG LUXI CHEM ENG DESIGN
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Problems solved by technology

But at present, the process of catalyst passivation technology is relatively complicated, the gas recycling rate is low, and there is no integrated process of reduction and passivation

Method used

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  • Reduction and passivation system for ammonia synthesis catalyst, and method thereof
  • Reduction and passivation system for ammonia synthesis catalyst, and method thereof

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Embodiment 1

[0024] A high-efficiency catalyst device includes two processes of catalyst reduction and passivation. The main equipment included in the reduction process is reduction furnace, heat exchange, cold exchange, water cooling, ammonia cooling, molecular sieve, dryer, regeneration heating furnace, and circulating fan; the main equipment included in the passivation process is passivation furnace, Roots blower, cyclone Separator, passivated water cooling.

[0025] The process flow is to load the catalyst into the reduction furnace, and the hydrogen gas with a maximum temperature of 500°C passes through the catalyst layer to be reduced in the furnace, and passes through a series of cooling, moisture, drying and heating cycles such as heat exchangers. After the catalyst is reduced, it is put into the passivation furnace, and the passivation is carried out by air heated to 40°C. The temperature in the passivation furnace is controlled at about 60°C. The fan circulates. The passivated ...

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Abstract

The invention discloses a reduction and passivation system for an ammonia synthesis catalyst, and a method thereof. The method comprises a catalyst reduction process and a catalyst passivation process. Main devices used in the reduction process comprise a reducing furnace, a heat exchanger, a cold exchanger, a water cooler, an ammonia cooler, a molecular sieve drying machine, a regeneration heating furnace and a cycle fan; and main devices used in the passivation process comprise a passivation furnace, a roots fan, a cyclone separator and a passivation water cooler. The system and the method have the advantages of simple flow, improvement of the use performances of the catalyst through catalyst pretreatment, shortening of the heating and reducing process after catalyst filling, and reduction of the burnt probability of internal parts in a synthetic tower.

Description

technical field [0001] The invention relates to a high-efficiency ammonia synthesis catalyst treatment process, in particular to a reduction passivation system and method for ammonia synthesis catalysts. technical background [0002] Synthetic ammonia catalyst can reduce the activation energy of the reaction between nitrogen and hydrogen, so that the reaction can proceed at a faster rate under a certain temperature and pressure. The development of synthetic ammonia catalyst is a prerequisite for the development of nitrogen fertilizer industry and chemical industry with synthetic ammonia as raw material. [0003] In China, there are more than ten manufacturers producing pre-reduction catalysts for ammonia synthesis, among which Luxi Chemical Industry and Nanjing Guochang are relatively large-scale and relatively mature in technology. The reduction process conditions of this type of catalyst are to reduce the catalyst in advance so that Fe 3 o 4 The reaction becomes active ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J33/00B01J23/745
Inventor 陈运锋肖光张文杰袁甫荣张明慧康健牛东芳段兆铎崔正新
Owner LIAOCHENG LUXI CHEM ENG DESIGN
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