Process for curing and dehydrating scum bottom sludge

A bottom sludge and scum technology, applied in the direction of dehydration/drying/thickened sludge treatment, etc., can solve the problems of inability to achieve rapid dehydration of scum and bottom sludge, small processing capacity, large investment, etc., and achieve easy stacking, treatment, and dehydration The effect of high speed and low investment

Inactive Publication Date: 2012-03-28

BC P INC CHINA NAT PETROLEUM CORP +1

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AI-Extracted Technical Summary

Problems solved by technology

It overcomes the shortcomings of the existing technology that cannot realize rapi...

Abstract

The invention relates to the technical field of treatment of oil sludge in oil fields, in particular to a process for curing and dehydrating scum bottom sludge. The process comprises the following steps of: metering the scum bottom sludge by a metering pump and pumping the scum bottom sludge to an initial mixing stirrer, wherein a curing agent is adjusted and boosted into the initial mixing stirrer by a spiral metering booster according to a proportion, and stirring at a speed of 50 r/m for 5 to 30 minutes; discharging the mixture into a secondary mixing stirrer and stirring at a speed of 150r/m for 10 to 15 minutes; converting the modified and cured scum bottom sludge from a colloid structure into a crystalline structure, and conveying to an air-drying place by a slurry pump, and conserving for 1 to 3 days until the water moisture content of the modified scum bottom sludge is reduced to be less than 40 percent and the heat value is more than 3,000 Kcal/kg; and finishing the process.By the process, quick dehydration for the scum bottom sludge and quantity reduction are realized; and the oily components of the cured scum bottom sludge are distributed uniformly, so recycling of the scum bottom sludge can be realized.

Application Domain

Sludge treatment by de-watering/drying/thickening

Technology Topic

Slurry pumpAir drying +7

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Examples

Experimental program(1)

Example Embodiment

[0011] As shown in the accompanying drawings, a scum bottom sludge solidification and dehydration process, the process steps are as follows: after the scum bottom sludge is measured by a metering pump, it is pumped into the primary mixing agitator, according to the curing agent: scum bottom sludge=3: Take the curing agent in a ratio of 17. The curing agent is adjusted and propelled into the primary mixing agitator by the screw metering propeller according to the proportion. The stirring speed is 50 r/min, stirring for 5 minutes, and discharging into the secondary mixing agitator, and the stirring speed is 150 r/min. 10 minutes, the modified and solidified scum bottom sludge is transformed from colloidal structure to crystal structure, and then transported to the drying site by the slurry pump, and cured for 1-3 days to form the scum bottom mud after the crystal structure. A part of the water is crystallized, and the other part is quickly evaporated to stabilize the scum bottom sludge, until the moisture content of the modified scum bottom sludge drops below 40% and the calorific value is above 3000Kcal/kg, the process is completed; The components and their mass ratios are: cement 35%, calcium oxide 25%, ferric oxide 10%, gypsum 5%, and kaolin 25%. The volume of the initial mixing agitator is 10 cubic meters, and 25 sets of spiral stirring teeth are installed inside. The volume of the secondary mixing agitator is 10 cubic meters, and 75 sets of double-spiral stirring teeth are installed inside.

[0012] The asphaltenes, colloids, light oil components and other organic matter in the modified and solidified scum bottom sludge are evenly distributed. The calorific value of the mud is above 3000Kcal/kg, a part is sent to the incinerator for direct incineration, and the other part and the coal (the calorific value is 4500Kcal/kg) are sent to the mixing mixer with a forklift according to the mixing ratio of 3:7 for mixing and stirring. The calorific value of the new fuel is about 4000Kcal/kg, which is directly transported to the steam boiler for incineration instead of coal.

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