Method for directionally producing syngas by chemical chain gasification of sludge
A synthesis gas and chemical chain technology, applied in gasification process, manufacture of combustible gas, petroleum industry, etc., can solve the problems of high energy consumption, low calorific value of gas, high tar content of gas, etc., and achieve low cost, convenient operation, good economical effect
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Embodiment 1
[0037] The method for directional production of synthesis gas by chemical looping gasification of sludge disclosed in this embodiment is realized through the following technical solutions:
[0038]Dehydration and drying: The sludge is dried at 80°C and dehydrated to a moisture content of 5%.
[0039] Oxygen carrier preparation: CuO, Al 2 o 3 The analytical pure is mechanically mixed at a mass ratio of 7:3, shaped by a planetary molding machine, calcined at 900°C for 4 hours, crushed and sieved into 40-60 mesh particles, and used as a copper-based oxygen carrier for sludge chemical chain gasification .
[0040] Chemical chain gasification: open the screw feeder, the dried sludge enters the sludge reactor from the second inlet 1, and the feed rate is 1kg / h; the prepared copper-based oxygen carrier passes through the first Two inlets 11 enter the circulating fluidized bed system in the sludge reactor 1, and feed the carrier gas through the carrier gas inlet 12 simultaneously, ...
Embodiment 2
[0046] Since the method and device for directional production of synthesis gas by sludge chemical looping gasification are the same as those in Example 1, details will not be repeated here, and only the implementation conditions and implementation results are listed in Table 1, as shown in Table 1.
[0047] Table 1 Implementation conditions and results of directional synthesis gas production from sludge chemical looping gasification based on modified iron ore oxygen carrier
[0048]
[0049] The preparation method of the modified iron ore in the present embodiment is: after the natural iron ore is pulverized and sieved, the equal volume is impregnated with Ni(NO 3 ) 2 or CoNi(NO 3 ) 2 , then dried at 105°C to 280°C for 6 hours, and then calcined at 900°C for 3 hours to obtain modified iron ore.
Embodiment 3
[0051] Since the method and device for directional production of synthesis gas by chemical looping gasification of sludge are the same as those in Example 1, details will not be repeated here, and only the implementation conditions and implementation results are listed in Table 2, as shown in Table 2.
[0052] Table 2 NiFe-based 2 o 4 Conditions and Results of Oxygen Carrier Sludge Chemical Looping Gasification Directional Production of Syngas
[0053]
[0054] The difference between embodiment 1 and embodiment 2 is that the oxygen carrier and reaction temperature adopted are different. Compared with the synthetic copper-based oxygen carrier in embodiment 1, the modified iron ore in embodiment 2 has better reactivity and carbon The conversion efficiency and the synthetic calorific value obtained are also higher; in addition, increasing the reaction temperature is beneficial to the sludge chemical chain gasification process. Adopt synthetic NiFe in embodiment 3 2 o 4 As ...
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