1, rectification measures
The transform of high organic sulfur content, refining process cannot take organic sulfur removal of large amounts of organic sulfur, directly into the PC removal system, PC solution in high concentration organic sulfur under long time, not onlythe bad quality, and extremely easy to cause the decarbonization system of sulfur blockage, affect the smooth operation of the whole system, so I plant intransformation the main heat exchanger with a water solution of tower, the COSand CS2 transformation, in the refining section to remove the generated H2S, not only to protect the safe operation of the PC decarburization process, but also can reduce the desulfurization section of the load (I plant desulfurization system hasfailure).
2, the effects of the use of
I plant after several investigations, the final selection of the temperature organic sulfur hydrolysis catalyst W505 Wuhan Colin Fine Chemical Co. Ltd. (in its physicochemical properties and technical indicators in Table 2).
Surface temperature organic sulfur hydrolysis catalyst 2 W505 type
The physicochemical properties and technical index
Project indicators
The appearance of white ball
Particle size, mm 3-5
Bulk density, kg/m3 700-800
The specific surface area, m3/g 300
Compression strength, N/g ≥ 50
Activity (COS conversion),% ≥ 95
The old low furnace reconstruction using hydrolysis reactor, diameter 2000mm,catalyst amount 5M3, pressure: 0.8Mpa, gas flow rate: 5000-7000Nm3/h.
Middle temperature hydrolysis in August 11, 2004 driving, running for 4 months, at temperatures between 160 ℃ - 190 ℃, variable organic sulfur content of exportsremain below 2.0mg/m3 (total sulfur content analysis results in table. Can be seen: the middle temperature hydrolysis, turn off the total sulfur content of exportsdecreased significantly. Decarburization is stable, solution consumption significantly reduced. The total sulfur content of decarburization after reaching thedesulfurization requirements.
Table 3 temperature hydrolysis after total sulfur analysis results of mgS/Nm3
When the extract after decarburization fine stripped off
08/11 572.1 0.08 0.05
12/15 781.5 0.11 0.07
12/16 921.2 0.08 0.05
12/25 861.1 0.09 0.06
12/26 941.2 0.08 0.05
3, the conclusion
Taking water gas as raw material to synthesize methanol or as other chemical raw materials, the temperature in the removal of organic sulfur hydrolysis method, a simple and convenient process is simple, do not need to normal temperature hydrolysis desulfurization mention moderate cooling, hydrolysis of H2S under variable and removal, desulfurization cost is low, good protective effects on decarburization and fine desulfurization.