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A harmless treatment method for high-salt sludge

A technology of harmless treatment and sludge, applied in the environmental field, can solve the problems of secondary pollution, high treatment cost and general efficiency, and achieve the effect of reducing environmental harm, mature and effective technology, and low cost.

Active Publication Date: 2019-03-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. If the existing technology treats sludge, if it is disposed of in landfill according to the hazardous waste filling process, it will be difficult to select a landfill site, the construction and operation management costs will be very high, and there will be long-term hidden dangers; if it is carried out together with drilling solid waste, etc. Solidification treatment, but due to the complex composition of sludge, containing chemical residues such as oxidants, and high levels of pollutants such as petroleum and chloride ions, it is inevitable that a lot of leachate will seep out after solidification treatment, which will affect the surrounding groundwater and soil. In addition, the biodegradability of high-salt sludge is poor, the effect of biochemical treatment is not good, and incineration will produce more serious secondary pollution
[0006] 2. The solution for treating high-salt sludge in the prior art has complex steps, long processing time, high processing cost and average efficiency

Method used

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  • A harmless treatment method for high-salt sludge
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  • A harmless treatment method for high-salt sludge

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Experimental program
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Effect test

Embodiment 1

[0031] Such as figure 1 , a harmless treatment method for high-salt sludge, characterized in that it comprises a primary filter press step, a stirring and cleaning step, a coagulation sedimentation step and an oxidation filter press washing step:

[0032] The first-stage filter press step is to perform press filter treatment on the sludge, and press the sludge into a mud cake and discharge it to the stirring and cleaning step;

[0033] The stirring and cleaning step is to add clear water and demulsifier to the mud cake and then wash and stir, discharge the sludge left in the lower layer to the oxidation pressure filtration washing step, continue the oil-water separation treatment of the upper layer liquid, and remove the sludge floating on the surface of the liquid. Grease is collected separately, and the supernatant liquid treated by oil-water separation is transported to the coagulation and sedimentation step;

[0034]The coagulation and sedimentation step refers to adding ...

Embodiment 2

[0038] Such as figure 1 , a harmless treatment method for high-salt sludge, characterized in that it comprises a primary filter press step, a stirring and cleaning step, a coagulation sedimentation step and an oxidation filter press washing step:

[0039] The first-stage filter press step is to perform press filter treatment on the sludge, and press the sludge into a mud cake and discharge it to the stirring and cleaning step;

[0040] The stirring and cleaning step is to add clear water and demulsifier to the mud cake and then wash and stir, discharge the sludge left in the lower layer to the oxidation pressure filtration washing step, continue the oil-water separation treatment of the upper layer liquid, and remove the sludge floating on the surface of the liquid. Grease is collected separately, and the supernatant liquid treated by oil-water separation is transported to the coagulation and sedimentation step;

[0041] The coagulation and sedimentation step refers to adding...

Embodiment 3

[0046] Such as figure 1 , a harmless treatment method for high-salt sludge, characterized in that it comprises a primary filter press step, a stirring and cleaning step, a coagulation sedimentation step and an oxidation filter press washing step:

[0047] The first-stage filter press step is to perform press filter treatment on the sludge, and press the sludge into a mud cake and discharge it to the stirring and cleaning step;

[0048] The stirring and cleaning step is to add clear water and demulsifier to the mud cake and then wash and stir, discharge the sludge left in the lower layer to the oxidation pressure filtration washing step, continue the oil-water separation treatment of the upper layer liquid, and remove the sludge floating on the surface of the liquid. Grease is collected separately, and the supernatant liquid treated by oil-water separation is transported to the coagulation and sedimentation step;

[0049] The coagulation and sedimentation step refers to adding...

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Abstract

The invention discloses a pollution-free treatment method of high-salt sludge, and relates to the technical field of the environment. The method includes the first-stage filter pressing step, the stirring and cleaning step, the coagulating and settling step and the oxidizing, filter pressing and washing step. Through the filter pressing, washing, oxidizing and filter pressing process, sludge is free of pollution, pollutants in sludge are effectively removed, especially chloridion and other inorganic components, drug residues and organic pollutants, the sludge is truly free of pollution, the damage to the environment is reduced, no more severe pollution can be caused through the washing method, sewage obtained after washing can be subjected to pollution-free treatment at the same time, recycling can be achieved, the washing effect is not influenced, and residual harmful substances are effectively removed through oxidizing and filter pressing.

Description

technical field [0001] The invention relates to the field of environmental technology, in particular to a harmless treatment method for high-salt sludge. Background technique [0002] Oil and gas field industrial wastewater mainly includes drilling wastewater, acid fracturing wastewater, workover wastewater, oil production (gas) wastewater, etc., which have the characteristics of high temperature, high salt, high ammonia nitrogen, high COD, etc., and poor biodegradability. Generally, flocculation and sedimentation are required. The chemical oxidation treatment process will produce a large amount of high-salt and high-organic pollutant sludge during the treatment process, which is generally managed and disposed of as hazardous waste. At present, there are two main ways to treat sludge in various sewage treatment stations. The landfill disposal process of the waste filling treatment process is difficult to select a landfill site, the construction and operation management costs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/14C02F11/12
CPCC02F11/122C02F11/14
Inventor 王敏刘真凯李硕周小舟曾向东何波李小俊祁建翔马智国张海龙李天宝
Owner CHINA PETROLEUM & CHEM CORP