Method and device for oxidative conversion of sodium sulfide in alkali fusant
A conversion device and alkali-melt technology, applied in the field of pulp and paper making, can solve the problems of large evaporation of dilute black liquor and inability to recover lignin, reduce production costs, facilitate flow and discharge of furnace body, and improve oxidation reaction efficiency Effect
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[0039] Example 1
[0040] Such as figure 1 , A method for the oxidative conversion of sodium sulfide in alkali melt, including the following steps:
[0041] 1. Furnace body preheating: open the hot gas flow control valve 2, introduce hot exhaust gas from the furnace of the alkali recovery furnace, and preheat the furnace cavity 16 through the adiabatic insulation pipe 1, and the preheating temperature is 600℃;
[0042] 2. Introduce the alkali melt: the alkali melt from the alkali recovery furnace enters the furnace chamber 16 through the alkali melt inlet 6, and the flow rate of the alkali melt is 2000kg / h (the processing capacity of the alkali recovery furnace is 100 tons / day);
[0043] 3. Introduce air: open the air flow control valve 4, the air enters from the air inlet 3, and the air flow rate is 50000m 3 / h, and mixed with hot air in the adiabatic insulation pipe 1 to obtain a mixed hot air of 350-600℃;
[0044] 4. Hot gas flow control: adjust the hot gas flow control valve 2 to c...
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[0048] Example 2
[0049] Such as figure 1 , A method for the oxidative conversion of sodium sulfide in alkali melt, including the following steps:
[0050] 1. Furnace body preheating: open the hot gas flow control valve 2, introduce hot tail gas from the furnace of the alkali recovery furnace, and preheat the furnace cavity 16 through the adiabatic insulation pipe 1, and the preheating temperature is 750℃;
[0051] 2. Introduce the alkali melt: the alkali melt from the alkali recovery furnace enters the furnace chamber 16 from the alkali melt inlet 6, and the flow rate of the alkali melt is 6000kg / h (the processing capacity of the alkali recovery furnace is 300 tons / day);
[0052] 3. Introduce air: open the air flow control valve 4, the air enters from the air inlet 3, and the air flow rate is 150000m 3 / h, and mixed with hot air in the adiabatic insulation pipe 1 to obtain a mixed hot air of 350-600℃;
[0053] 4. Hot gas flow control: adjust the hot gas flow control valve 2 to contro...
Example Embodiment
[0057] Example 3
[0058] Such as figure 1 , A method for the oxidative conversion of sodium sulfide in alkali melt, including the following steps:
[0059] 1. Furnace body preheating: open the hot gas flow control valve 2, introduce hot exhaust gas obtained by burning oil or fuel, and preheat the furnace cavity 16 through the adiabatic insulation pipe 1, and the preheating temperature is 900℃;
[0060] 2. Introduce the alkali melt: the alkali melt from the alkali recovery furnace enters the furnace chamber 16 from the alkali melt inlet 6, and the flow rate of the alkali melt is 50000kg / h (the processing capacity of the alkali recovery furnace is 2500 tons / day);
[0061] 3. Introduce air: open the air flow control valve 4, the air enters from the air inlet 3, and the air flow rate is 2,500,000m 3 / h, and mixed with hot air in the adiabatic insulation pipe 1 to obtain a mixed hot air of 350-600℃;
[0062] 4. Hot gas flow control: adjust the hot gas flow control valve 2 to control the ho...
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