A coal-to-methanol synthesis gas purification sulfur recovery process
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A technology for gas purification of sulfur and coal to methanol, applied in the chemical industry, sustainable manufacturing/processing, inorganic chemistry, etc., to achieve the effect of avoiding potential safety hazards
Active Publication Date: 2020-11-24
HENAN LONGYU COAL CHEM
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This process completely avoids the existence of carbon deposition, water vapor, and clogging during the catalyst heating process, avoids potential safety hazards in the process, and solves the problems existing in existing sulfur recovery devices
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Embodiment 1
[0075] One kind of coal, methanol synthesis purge gas sulfur recovery process, comprising heating the catalyst after synthesis of elemental sulfur, a sulfur scavenging outage means, includes the following steps:
[0076] (1) heating the catalyst:
[0077] For sulfur recovery and nitrogen replacement heating system, when replacing the end ≤0.05% sulfur recovery catalyst warm up before the combustible gas reaches the gas analyzer volume content indicators; substituted eligibility criteria for the system CO, H 2 H 2 S, CH 3 The total volume of the OH content ≤0.05%;
[0078] When at / h heating rate of 30 ~ 40 ℃ sulfur recovery apparatus for heating a catalyst bed heater with nitrogen, the inlet temperature of the catalyst bed was raised to 80 ± 10 ℃, 2 hours to remove physically adsorbed water temperature, while the catalyst of each flare interpass temperature; at / h heating rate of 30 ~ 40 ℃ control the catalyst bed inlet temperature was raised to 120 ± 10 ℃, constant for 2 hours ...
Embodiment 2
[0101] A coal-forming methanol synthesis gas purification sulfur recovery process, including the temperature rise of the catalyst, the synthesis of single-tape sulfur, after the device is off, including the following steps:
[0102] (1) The temperature rise of the catalyst:
[0103] The sulfur recovery and nitrogen warming system are replaced, and when the sulfur recovery catalyst begins the temperature analysis index to reach the gas volume content of ≤ 0.05%, the replacement is completed.
[0104] The sulfur recovery apparatus catalyst bed is raised by a temperature rise rate of 30 to 40 ° C / h by a nitrogen heater, and when the catalyst bed inlet temperature rises to 80 ± 10 ° C, the constant temperature is 2 hours to remove physical adsorbent water, and the graft catalyst is pulled. Layer temperature; controlling the temperature of the catalyst bed at a temperature rise rate of 30 to 40 ° C / h rises to 120 ± 10 ° C, and the temperature of 2 hours at the temperature is 2 hour...
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Abstract
The invention provides a recovery process for purifying sulfur with coal-to-methanol synthesis gas. The process comprises the following steps: performing replacement on a reactor and a system nitrogentemperature rise system, and heating a sulfur recovery catalyst bed by adopting nitrogen; clearing sulfur after stopping sulfur recovery, controlling the temperature of a heater at the inlet of the reactor, heating by medium pressure steam, ensuring the temperature of the inlet of the bed to be 120-260 DEG C, and clearing sulfur while controlling the bed temperature to 120-260 DEG C. The volume content of H2S and S at the outlet of the bed is less than 0.01%, and when no liquid sulfur is discharged during drain recovery of a system condenser, the operation of clearing sulfur with nitrogen isended. According to the process disclosed by the invention, catalyst starting can be completed, the activity temperature is met, and in the processes of raising the temperature of the sulfur recoverycatalyst and stopping sulfur clearing, incineration side-reactions are fundamentally avoided, so that the influences of carbon deposit and water vapor on the catalyst activity can be eliminated. In addition, the inert gas nitrogen is taken as the sulfur-clearing carrier, so that unsafe factors brought by leakage are fundamentally eliminated, and intrinsic safety is realized.
Description
Technical field [0001] The present invention belongs to the field of acid gas sulfur technology, and in particular to a coal-forming methanol synthesis gas purification sulfur recovery process. Background technique [0002] During the coal methanol, in order to prevent moline synthesis catalyst sulfur poisoning inactivation, the pre-step of the synthesis gas purification desulfurization is an indispensable process. In the production process, the sulfur recovery apparatus requires the temperature rise of the catalyst before the production process, allowing the catalyst to reactivity. The sulfur recovery apparatus production process includes two needle necessary to operate before the catalyst temperature rise and after the operation of the system, to maintain sulfur recovery catalyst activity of sulfur recovery unit. [0003] At present, the temperature rise and stop of the sulfur recovery catalyst is to provide high temperature flue gas temperature rise by using a sulfur recovery ...
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