Isothermal low-temperature CO shift reactor

Abstract

The invention relates to an isothermal low-temperature CO shift reactor which is reaction equipment used for carrying out a reaction that CO and water vapor are converted into CO2 and H2 under certain low temperature. The isothermal low-temperature CO shift reactor comprises a radial basket in a cylindrical shell, a vapor chamber and a water chamber, wherein a catalyst is filled in the radial basket with a central tube to form a catalyst bed, and the catalyst bed is internally provided with a plurality of suspension heat exchange tubes containing water; the upper ends of short tubes are communicated with the water chamber, while the lower ends are inserted into the heat exchange tubes, and the upper ends of the heat exchange tubes are communicated with the vapor chamber; the catalyst bed is also provided with an inversed U-shaped tube, and both ports of the inversed U-shaped tube are respectively connected with two concentric annular tubes; one annular tube is connected with a vapor outlet of a vapor packet through a connecting tube and a vapor inlet, while the other annular tube is communicated with an annular space between the cylindrical shell and the radial basket through a corresponding connecting tube, and an unreacted gas inlet is also communicated with the annular space; a water outlet of the vapor packet is connected with the water chamber; and a vapor outlet of the vapor chamber is connected to a vapor inlet of the vapor packet. The isothermal low-temperature CO shift reactor can continuously release heat and continuously remove reaction heat by using another medium so as to maintain the reaction to be carried out at isothermal low temperature.

Description

technical field [0001] The invention relates to a method for converting CO and water vapor into CO at a certain constant low temperature 2 with H 2 The reaction equipment, the application of gas containing a large amount of CO into H 2 , and further used as a hydrogen source for synthetic ammonia, methanol, acetic acid and other products. Background technique [0002] Coal gas, natural gas reformed gas, coke oven gas reformed 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 90% CO, and the CO content in coal gas is 30% to 68% (with gas different methods), CO can be transformed into useful H 2 , the transformed reaction is: [0003] [0004] The conversion reaction is an exothermic reversible reaction, there must be a catalyst and an excess of H 2 O (water vapor) is excessive according to the reaction formula, in order to make the reaction to generate H 2 di...

AI Technical Summary

Problems solved by technology

[0032] The above-mentioned first type of typical conversion process has three conversion furnaces, and each conversion furnace is connected with a cooling heat exchanger; there are many sets of equipment, the process is long, and the floor area is large; the first conversion furnace is particularly prone to overheating

[0033] The second type of typical transformation process has three transformation furnaces, two of which are respectively connected with water spray humidification towers, with a large number of equipment, a long process, and a large area; There are many regulating valves (control points) in the sub-line of condensate cooling and shock, and the operation is difficult

[0034] The third typical conversion process can only deal with the conversion of gas with a CO content of about 30%. A conversion furnace contains three-stage catalysts, which are connected with an external cooling heat exchanger and two water spray cooling and superheating devices, with three inputs and three outputs. The pipeline is complex and the temperature adjustment is difficult

[0035] Spraying water to cool and increase the temperature, if the water volume is not appropriate, the water quality is not good, it will cause the next stage of catalyst pulverization or agglomeration

[0036] In short, the above three typical conversion processes require many conversion devices, long processes, large steam loss, and difficult operation and control.

Especially the first furnace (section) is easy to overheat and burn out the catalyst

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