Reduction method of methanol synthesis catalyst

Abstract

The invention discloses a reduction method of methanol synthesis catalyst. The reduction method comprises the following steps: conveying hydrogen from a gas storage tank of a hydrogen drainage and irrigation vehicle to a hydrogen depressurizing valve of the hydrogen drainage and irrigation vehicle to depressurize; conveying hydrogen after the depressurizing treatment to a synthesis gas compressor through a general hydrogen supplementing pipe to boost; conveying the synthesis circular gas containing hydrogen and nitrogen to a nitrogen inlet of the synthesis gas compressor so as to mix with the hydrogen after the boosting treatment, wherein the volume percent of every component in the synthesis circular gas is: 0.3-0.5% of hydrogen and 99.5-99.7% of nitrogen; conveying the mixed gas to a catalyst bed layer of a methanol synthesis reactor through a gas conveying pipe to participate in the reduction reaction. By adopting the technical scheme of the invention, the reduction reaction speed is accelerated, the reaction time is saved, and working efficiency is improved; the system is completely and stably ran without a series of assistant systems and the gas required by reduction is supplied, and thus cost is saved.

Description

technical field [0001] The invention relates to the technical field of industrial catalyst reduction, in particular to a method for reducing methanol synthesis catalysts. Background technique [0002] In the traditional process, the newly loaded methanol synthesis catalyst must be heated and reduced for 80 hours after the system is running before it can be used. This affects the efficiency of industrial production, delays the work process, and prolongs the working time. [0003] According to the original design plan, the industrial reduction of the methanol synthesis catalyst adopts the plan of reducing by the system's self-produced reformed gas after reforming and feeding oxygen. However, this scheme requires the normal and stable operation of auxiliary systems such as the air separation system, synthesis gas compressor, crude desulfurization, fine desulfurization, conversion system, and heating furnace to supply the gas required for methanol catalyst reduction. The amount...

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Problems solved by technology

However, this scheme requires the normal and stable operation of auxiliary systems such as the air separation system, synthesis gas compressor, crude desulfurization, fine desulfurization, conversion system, and heating furnace to supply the gas required for methanol catalyst reduction. The amount of gas is small. If the aforementioned process device is activated to supply the gas required for catalyst reduction during reduction, the operating cost of the system will be too high and the cost will be wasted.

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