Modified device improving calorific value of straw gas

A modified device improving calorific value of straw gas belongs to the technical field of follow-up utilization of straw, comprising a compressor, a preheater, a converter for synthesis of carbonic oxide and hydrogen, a condenser, a gas-liquid separator, an adsorption purifier, a straw gas circuit pipeline and a converted gas circuit pipeline, wherein the straw gas circuit pipeline penetrates through the preheater to be connected between the outlet of the compressor and the inlet of the converter; and the converted gas circuit pipeline penetrates through the condenser to be connected between the outlet of the converter and the inlet of the gas-liquid separator, and between the outlet of the gas-liquid separator and the inlet of the adsorption purifier. The modified device can be made to be in skid-mounted moving type, and can be used for treating the straw gas in scattered straw gas holder stations. The energy efficiency is high, and the calorific value of the straw gas can be increased from about 2000Kcl /Nm3 to 5000-8500Kcl/Nm3 in short time.