Separation method of oily sludge and application of sludge impurities to preparation of active carbon
A technology for preparing activated carbon and separation methods, which is applied in water/sludge/sewage treatment, sludge treatment, and pyrolysis sludge treatment, etc. Extraction and other problems, to avoid incomplete water-oil separation, improve the degree of water-oil separation, and promote the effect of rupture
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Embodiment 1
[0039] 1) Microwave the oily sludge for 2 minutes under microwave conditions with a frequency of 2500 MHz and an output power of 150 W; centrifuge the oily sludge after the above microwave treatment at a speed of 2000 r / min, and then place Place it under the condition of -15~-20℃ for 3-8 hours, add demulsifier to it, then place it under the condition of rotating speed of 4500r / min for a second centrifugation, and then remove the liquid phase to obtain the pretreated oily sludge;
[0040]2) Use nitrogen gas with a flow rate of 1L / min to purge the reactor to discharge the air in the reactor to form a nitrogen environment, and place the pretreated oily sludge in the above reactor at a heating rate of 20°C / min. Raise the temperature to 800°C, and then keep it warm for 10 minutes for dry distillation (during the dry distillation process, nitrogen gas is continuously fed at a flow rate of 100mL / min), and the gas phase and impurities after dry distillation are collected respectively, ...
Embodiment 2
[0042] 1) Microwave the oily sludge for 5 minutes under microwave conditions with a frequency of 2500 MHz and an output power of 150 W; centrifuge the oily sludge after the above microwave treatment at a speed of 2200 r / min, and then place it in Place it under the condition of -15~-20℃ for 3-8 hours, add demulsifier to it, then place it under the condition of rotating speed of 5500r / min for a second centrifugation, and then remove the liquid phase to obtain the pretreated oily sludge;
[0043] 2) Use nitrogen with a flow rate of 1L / min to purge the reactor to discharge the air in the reactor to form a nitrogen environment, and place the pretreated oily sludge in the above reactor at a heating rate of 40°C / min Raise the temperature to 900°C, and then keep it warm for 20 minutes to carry out dry distillation (during the dry distillation process, nitrogen gas is continuously fed at a flow rate of 100mL / min), and the gas phase and impurities after dry distillation are collected res...
Embodiment 3
[0045] Separation was carried out as in the separation method shown in Example 1, except that the microwave treatment time was 1 min, and the output power was 80 W, and the impurities in the gas phase and dry distillation were collected respectively, which were recorded as A3.
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