Sludge sintering brick process
A technology of sintered bricks and sludge, applied in the direction of sustainable waste treatment, solid waste management, application, etc., can solve the problems of increased heavy metal content in sludge, and achieve low energy consumption
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Embodiment 1
[0018] Take 20 tons of sewage sludge with an average water weight ratio of 78.47%, and 20 tons of sludge dry powder obtained by natural drying and pulverization of lakes, rivers and other dredged silts, fully stir and mix, aerobic aging for 3 days, and then use this as dry powder with 20 tons The sewage sludge per ton is fully stirred and mixed, and then aerobically aged for 2 days. This cycle is repeated 4 times, and the adobe is sent to a brick making machine for pressing the adobe. Stack the adobes to dry naturally, put the dried adobes into the kiln for firing, the moisture content of the adobes is 5.83% by weight when entering the kiln, the firing temperature is controlled at 1050C, and the air is continuously introduced into the kiln during firing, and the temperature of the exhaust gas is cooled to Below 150°C, and the sintered tail gas is washed with alkali and then discharged. The obtained bricks meet the relevant national standards.
Embodiment 2
[0020] Take 20 tons of sewage sludge with an average water weight ratio of 79.53%, and 30 tons of sludge dry powder obtained by natural drying and pulverization of dredged sludge from lakes and rivers, etc., fully stir and mix, aerobic aging for 5 days, and then use this as dry powder and 20 tons The sewage sludge was fully stirred and mixed, and then aerobically aged for 1 day, and this cycle was repeated 3 times. The adobe is sent to a brick machine to be pressed, the adobe pressure is 1.4MPa, and the moisture content of the adobe is 26.4% by weight. The bricks are stacked and dried naturally, and the dried bricks are fired into the kiln. When entering the kiln, the moisture content of the bricks is 6.68%. to below 150°C, and discharge the sintered tail gas after alkali washing. The obtained bricks meet the relevant national standards.
[0021] Implement pour 3:
[0022] Take 20 tons of sewage sludge with an average water content of 79.31% and 25 tons of river dredging sl...
Embodiment 4
[0024] Take 20 tons of sewage sludge with an average water content of 81.46% and 40 tons of river dredging sludge dry powder and mix them thoroughly, and age them aerobically for 3 days. Aging for 2 days, so cycled 6 times. Sent to the brick making machine for pressing, the brick making pressure is 1.8MPa, and the moisture content weight ratio of the brick is 27.85%. Stack the adobes to dry naturally, then put the dried adobes into the kiln for firing. When entering the kiln, the moisture content of the adobes is 6.86% by weight, and the firing temperature is controlled at 1070°C. Air is continuously introduced into the kiln during firing, and the temperature of the exhaust gas is cooled. to below 150°C, and discharge the sintered tail gas after alkali washing. The obtained bricks meet the relevant national standards.
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