Process for preparing CO and synthetic gas and methanol by steam heat-exchanging type parallel conversion of hydrocarbons
A heat-exchanging, reforming gas technology, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve problems such as underutilization of natural gas resources, imbalance of hydrogen and carbon, joint production, etc. Achieve the effects of reducing fuel gas consumption and combustion flue gas emissions, reducing heat loss, and reducing consumption indicators
Active Publication Date: 2009-09-02
庞玉学
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[0006] However, natural gas resources have not been fully utilized in the above-mentioned processes, methanol production cannot be combined with methanol carbonylation acetic acid production, a large amount of fuel gas is required to be burned, and the problem of hydrogen and carbon imbalance cannot be fundamentally solved
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[0039] see figure 1 , the feed gas containing hydrocarbons passes through pipe 1 (or the H 2 After mixing, the raw material gas preheating coil entering the convection section of the externally heated primary reformer 9 is preheated to 250-430°C, and then enters the hydrodesulfurization reactor 6 through the pipeline 5 to remove harmful gases to the subsequent process. Sulfur, with a catalyst in the reactor. The desulfurized gas flows out from the pipeline 7 and is mixed with the process steam (pressure 0.3-4.5MPa) from the pipeline 33, which is the process raw material gas, and enters the natural gas / steam preheating coil in the convection section of the externally heated primary reformer. The temperature is raised to 400-600°C, the pressure is 0.2-4MPa, and the pipes enter the reforming tubes of the heat-exchanging primary reformer 10, 10' and the external heating primary reforming furnace 9 respectively through the pipeline 8. In these reforming tubes, Contains a catalyst...
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The invention relates to a method for preparing CO, synthesis gas and methanol through heat-exchanging parallel conversion of hydrocarbon steam, which adopts an external heat-type one-stage reformer and two heat-exchange one-stage reformers in parallel to complete the one-stage steam reforming of hydrocarbons Reaction, the first-stage reforming gas from the first-stage reformer enters two parallel-operated second-stage reformers, and CO2 is added to the second-stage reformer at the same time, in which CH4 is deeply reformed. The second-stage reformed gas at the outlet of the first-stage reformer in the two-stage reformer, the tail gas after part of the CO separation is mixed with the second-stage reformed gas at the outlet of the other second-stage reformer as synthesis gas, which can be used to synthesize Methanol. This method can effectively use the high-level thermal energy of the high-temperature second-stage reforming gas at the outlet of the second-stage reformer to heat the substances participating in the chemical reaction in the reforming tube of the heat-exchanging primary reformer, thereby greatly saving the consumption of fuel hydrocarbons and making hydrocarbon gas resources be recycled.
Description
technical field [0001] The invention relates to a method for preparing CO, synthesis gas and methanol through heat exchange parallel conversion of hydrocarbon steam. Background technique [0002] Using gaseous hydrocarbons as raw materials to prepare raw material gas for ammonia synthesis, the earliest industrialized process is partial oxidation at atmospheric pressure. With the development of metallurgical technology, the processing and production of high-temperature resistant alloy conversion tubes (such as HK-40, HP-Nb) has been obtained. Solved, the gaseous hydrocarbon pressurized steam reforming process has replaced the atmospheric pressure partial oxidation process. So far, the conversion pressure has been increased from normal pressure to 3.0-4.3MPa, and the production scale is becoming larger and larger. The largest single-series synthetic ammonia in the world today is 1700MTPD, and the largest single-series methanol is above 2540MTPD. The traditional synthesis gas ...
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IPC IPC(8): C01B3/36C01B31/18C07C31/04C07C29/151
Inventor 庞玉学刘武烈万蓉张学仲王志坚庞彪曾竹萍
Owner 庞玉学