Desulfurization device used for steam reforming process

The utility model discloses a desulfurization device used for a steam reforming process. The desulfurization device comprises a high-pressure air incoming pipe, a low-pressure air incoming pipe, a natural gas compressor, a natural gas preheater, a primary reformer preheating coiler and a desulfurization reactor, an air inlet of the natural gas compressor is communicated with the low-pressure air incoming pipe, an air inlet of the natural gas preheater is communicated with the high-pressure air incoming pipe and an air outlet of the natural gas compressor respectively, an air inlet of the primary reformer preheating coiler is communicated with an air outlet of the natural gas preheater, and an air inlet of a desulfurization reactor is communicated with an air outlet of the primary reformer preheating coiler. The natural gas preheater is adopted to change temperature when entering the primary reformer convection section preheating coiler, so that reaction temperature of high-pressure natural gas in the desulfurization reactor is guaranteed, heat-resistant requirements and demanded quantity of materials like the primary reformer convection section coiler are lowered, and cost is lowered greatly.