A method for thickening sludge in a convection flow primary sedimentation tank
A primary sedimentation tank, advection technology, applied in chemical instruments and methods, water/sludge/sewage treatment, dewatering/drying/concentrated sludge treatment, etc. The problems of filtration specific resistance value and sludge moisture difficulty can achieve the effects of low cost, increased concentration rate, and reduced pressure filtration load and difficulty.
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Embodiment 1
[0016] A method for concentrating sludge in an advection primary sedimentation tank, comprising the following steps:
[0017] (1) Discharge the sewage into the advection primary sedimentation tank, and add iron powder accounting for 1% of the sewage weight according to the amount of sewage, and make it in the advection primary sedimentation tank with a stirring speed of 200r / min for 2 hours. , then add carbon powder accounting for 2% of the sewage weight, and use a stirring speed of 1000r / min to stir for 10min, then place it under normal temperature environment, let it stand for 1h, and set it aside;
[0018] (2) Use a gantry crane, and hang a grab bucket on the steel cable of the gantry crane, and drop it into the advection primary settling tank through the grab bucket, and grab the sludge in the advection primary settling tank and move it to the thickening tank through the grab bucket , and in the process of grabbing sludge, the squeeze force on the grab bucket is 5.7kg / m 2...
Embodiment 2
[0020] A method for concentrating sludge in an advection primary sedimentation tank, comprising the following steps:
[0021] (1) Discharge the sewage into the advection primary sedimentation tank, and add iron powder accounting for 5% of the sewage weight according to the amount of sewage, and make it in the advection primary sedimentation tank with a stirring speed of 500r / min for 3 hours. , then add carbon powder accounting for 5% of the sewage weight, and adopt a stirring speed of 2000r / min to stir for 20min, then place it under normal temperature environment, let it stand for 10h, and set it aside;
[0022] (2) Use a gantry crane, and hang a grab bucket on the steel cable of the gantry crane, and drop it into the advection primary settling tank through the grab bucket, and grab the sludge in the advection primary settling tank and move it to the thickening tank through the grab bucket , and in the process of grabbing sludge, the squeeze force on the grab bucket is 6.5kg / m...
Embodiment 3
[0026] A method for concentrating sludge in an advection primary sedimentation tank, comprising the following steps:
[0027] (1) Discharge the sewage into the advection primary sedimentation tank, and add iron powder accounting for 2% of the sewage weight according to the amount of sewage, and make it stir in the advection primary sedimentation tank with a stirring speed of 300r / min for 2.5h Finally, add carbon powder accounting for 3% of the sewage weight to it, and adopt a stirring speed of 1500r / min to stir for 15 minutes, then place it under normal temperature environment, let it stand for 5 hours, and set it aside;
[0028] (2) Use a gantry crane, and hang a grab bucket on the steel cable of the gantry crane, and drop it into the advection primary settling tank through the grab bucket, and grab the sludge in the advection primary settling tank and move it to the thickening tank through the grab bucket , and in the process of grabbing sludge, the squeeze force on the grab...
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