Purifying treatment method for oil-containing sludge

A technology for purification treatment and oily sludge, which is applied in the direction of sludge treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., and can solve the problems such as the oil content of sludge is not up to standard and the effect of purification treatment is poor

Inactive Publication Date: 2013-12-18
河北海清大地环保科技有限公司 +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] In order to solve the problem that the purification treatment effect of the existing oily sludge purification treatment method is poor, and the oil content of the purified sludge is not up to the standard, the invention provides a kind of oily sludge purification treatment method, comprising the following steps: a. The sludge is cleaned and screened; b. The oily sludge that has been cleaned and screened is crushed and homogenized to obtain an oily sludge; c. The oily sludge is separated from the oily sludge to obtain mud, wherein the temperature of the oily sludge is 80-85°C, the volume ratio of oil sludge to water in the oil sludge is 1:0.75; d. Concentrate the sludge

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Embodiment Construction

[0017] Various aspects and features of the present invention are further described below.

[0018] According to a specific embodiment of the present invention, the oily sludge purification treatment method is as follows:

[0019] (1) Pretreatment process: feeding, conveying, fluidization, screening

[0020] The oil sludge and oil soil stored in the sludge storage tank are broken into bags and sprayed by a drum to remove large debris in the sludge and fluidize the sludge at the same time.

[0021] The specific method is: the oily sludge is transported to the drum screening device through the lifting device, and the oily sludge is cleaned and screened through the high-pressure cleaning water pipes on both sides of the screen. -1.2MPa.

[0022] (2) Comprehensive deep hot washing process: sludge homogenization, oil sludge separation, oil-water separation

[0023] The sludge is conveyed to the oil sludge homogenizer integrating chopping and stirring functions through the screw f...

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Abstract

The invention provides a purifying treatment method for oil-containing sludge. The purifying treatment method comprises the following steps: a. carrying out a cleaning and sieving step of the oil-containing sludge; b. carrying out a crushing homogeneous step of the cleaned and sieved oil-containing sludge to obtain an oily slurry; c. carrying out an oil-slurry separation step of the oily slurry to obtain a slurry, wherein the temperature of the oily slurry is 80-85 DEG C, and the volume ratio of oil-slurry to water in the oily slurry is 1:0.75; and d. concentrating the slurry. Slurry sand separated by the method of the invention reaches a sludge discharge standard (the oil content<=0.3%) stated in the ''Control Standards for Pollutants in Sludge from Agricultural Use (GB4284-84)'' issued by the national Ministry of Environmental Protection.

Description

technical field [0001] The invention relates to a method for purifying and treating oily sludge. Background technique [0002] Oilfields produce a large amount of oily sludge such as oily sludge, oily soil and tank bottom sludge every year. At present, most oilfields do not use advanced sludge treatment facilities for sludge treatment. A large amount of sludge is either piled in the open air or temporarily stored in crude oil storage tanks and In the sewage tank, there are not only hidden dangers of environmental pollution, but also reduce the operating efficiency of the crude oil and sewage treatment systems of the combined station, and have a great impact on the production system, burying hidden dangers for the normal production of the combined station. [0003] The existing oily sludge purification treatment method is mainly to add chemicals to the oily sludge for thermal washing treatment in the treatment processes such as air flotation, cavitation, and cyclone separatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00
Inventor 白鸿斌王占生
Owner 河北海清大地环保科技有限公司
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