High-CO high-conversion-rate isothermal shift reactor

Abstract

The invention discloses a high-CO high-conversion-rate isothermal shift reactor and a process using the high-CO high-conversion-rate isothermal shift reactor. The isothermal shift reactor comprises a shell, an inner cavity, an upper tube sheet and a lower tube sheet welded with water tubes, and a bottom tee joint; shell covers are respectively arranged at the upper end and the lower end of the shell, a water chamber and a steam chamber are arranged at the upper part of the inner cavity, an upper catalyst bed is arranged in the middle of the inner cavity, a lower catalyst bed is arranged at the lower part of the inner cavity, the water tubes are distributed on the upper catalyst bed, no water tube is arranged on the lower catalyst bed, a center tube is arranged in the inner cavity, the upper part of the center tube is located in the upper catalyst bed, the lower part of the center tube is located in the lower catalyst bed, the bottom tee joint is provided with an unreacted gas inlet, an exchange gas outlet and a steam and water mixture inlet, a steam and water mixture spray tube is sleeved in the center tube, and the reactor is equipped with different technological processes for the unreacted gas with different CO% and the converted gas with different CO%. The high-CO high-conversion-rate isothermal shift reactor can achieve low temperature, high CO, high conversion rate and small system resistance.

Description

technical field [0001] The present invention relates to the fields of synthetic ammonia, methanol synthesis, ethylene glycol production, coal-to-oil, coal-to-natural gas, hydrogen production and utilization of industrial furnace waste gas, in particular to a high-CO high conversion rate reactor and process flow, involving industrial furnace tail gas, CO (up to 85% or more) in industrial gas reacts with water vapor to become hydrogen, realizing a high conversion rate (up to 98.5% or more) shift reactor and process. Background technique [0002] Coal gas, natural gas conversion gas, coke oven gas conversion gas, calcium carbide furnace tail gas, blast furnace gas, etc., all of these gases contain a large amount of CO, for example, calcium carbide tail gas contains 80% CO, and the CO content in coal gas is 30% to 68% (with the different methods), CO can be transformed into useful H 2 , the transformed reaction is: [0003] CO+H 2 O (steam) = CO 2 +H 2 +Q [0004] The conv...

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Problems solved by technology

[0024] 1. Coal gas containing 68.65% CO, the shift gas is used for ammonia or hydrogen production, and the conversion rate of the shift gas CO is reduced to ~0.4%, which requires a high conversion rate. More than 99% requires four stages and five shift furnaces, and the shift reactor is too large There are many, there is an air-gas heat exchanger, 6 cooling condensers, and a water spray cooler; at least 17 main equipment are required, so there are too many equipment and too many connecting pipes; the area is large, the investment is large, and the operation High difficulty;

[0025] 2. If the CO in the untransformed gas is as high as 70% to 86%, there are more equipment and longer connecting pipes, even if four to five stages of a

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