Advanced heating system for ammonia synthesis catalyst and heating method

A technology of ammonia synthesis and catalyst, which is applied in the heating system and heating field, can solve the problems of low synthetic ammonia synthesis efficiency, long start-up process cycle, waste of process gas, etc., and achieve the effect of improving effective utilization rate, shortening start-up time, and saving start-up costs

CN104556145AInactive Publication Date: 2015-04-29GUIZHOU TIANFU CHEM
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2015-04-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an advanced heating system for an ammonia synthesis catalyst. The advanced heating system comprises an ammonia synthesis unit (2), wherein the ammonia synthesis unit (2) is connected with a pretreatment unit (1) and a non-shift gas washing tower (3) respectively; the pretreatment unit (1) comprises a CO conversion device (4); the CO conversion device (4) is connected with a molecular sieve (6) through a shift gas washing tower (5); the molecular sieve (6) is connected with a liquid nitrogen washing device (7); the ammonia synthesis unit (2) comprises an ammonia synthesis compressor (8); the ammonia synthesis compressor (8) is connected with an ammonia synthesis device (10) through a start-up heating furnace (9); the ammonia synthesis device (10) is provided with an ammonia synthesis catalyst bed (11). The advanced heating system greatly improves the production efficiency of synthesis ammonia, avoids the waste of process gas, reduces the production cost of synthesis ammonia, and effectively increases the utilization rate of the process gas.
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Description

technical field

[0001] The invention relates to a heating system and a heating method, in particular to an ammonia synthesis catalyst heating system and a heating method in advance. Background technique

[0002] When the ammonia synthesis unit is started up, the ammonia synthesis catalyst requires the use of a start-up heating furnace to raise the bed temperature of the ammonia synthesis catalyst to above the catalyst activation temperature, and ammonia synthesis gas (nitrogen and H 2 The mixed gas) is used as a heat carrier to raise the temperature, and the heated fuel gas comes from ammonia synthesis gas. Before the temperature of the catalyst bed reaches the activation temperature, the ammonia synthesis gas is only a heat source carrier. Since the catalyst temperature does not reach the activation temperature, no ammonia synthesis reaction will occur. During the heating up of the ammonia synthesis catalyst, the ammonia synthesis gas at the gas refining outlet can only be...

Examples

Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but not as a basis for limiting the present invention.

[0046] Example. A system for raising the temperature of an ammonia synthesis catalyst in advance, consisting of figure 1 As shown, the ammonia synthesis unit 2 is included, and the ammonia synthesis unit 2 is respectively connected with a pretreatment unit 1 and an unshifted gas scrubber 3; the pretreatment unit 1 includes a CO conversion device 4, and the CO conversion device 4 passes through a shifted gas scrubber 5 is connected with molecular sieve 6, and molecular sieve 6 is connected with liquid nitrogen washing device 7; Described ammonia synthesis unit 2 comprises ammonia synthesis gas compressor 8, and ammonia synthesis gas compressor 8 is connected with ammonia synthesis device 10 through start-up heating furnace 9, ammonia synthesis unit 2 The synthesis unit 10 is provided with an ammonia...