Harmless treatment method for waste water-based mud

A technology for harmless treatment and waste water, which is applied in mining wastewater treatment, water/sludge/sewage treatment, sludge treatment, etc. It can solve the problem that waste water-based mud cannot be effectively treated, and achieve the effect of reducing operating costs.

Active Publication Date: 2021-07-13
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] The main purpose of the present invention is to provide a harmless treatment method for waste water-based mud to solve the problem that waste water-based mud cannot be effectively treated in the prior art

Method used

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  • Harmless treatment method for waste water-based mud

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Embodiment 1

[0038] The waste drilling mud in the Yonghe block of PetroChina Coalbed Methane Linfen Branch Company was treated. The waste mud index: solid content 11.8%, total hardness 27300mg / L, calcium ion 9000mg / L, iron ion 221mg / L, magnesium ion 921mg / L.

[0039] Processing technology such as figure 1 As shown, the specific process includes: waste drilling mud is pumped into the first tempering tank 10 through a mud pump, inorganic salt and PAM are added in the first tempering tank 10, and the waste drilling mud is broken and tempered; The waste mud after gelatin conditioning is pumped into the plate and frame filter press 20 for solid-liquid separation through the plunger pump. After maintaining the pressure in the plate filter press 20 for 1 hour, the filtrate and filter cake are discharged. After the strength of the filter cake reaches the standard, It can be used to pave the well site road; the filtrate is discharged into the electrocatalytic reaction device 30, and in the electroc...

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Abstract

The invention provides a harmless treatment method for waste water-based mud. The method comprises the following steps: mixing the waste water-based mud with inorganic salt and PAM, demulsifying and tempering to form tempered slurry; carrying out solid-liquid separation on the conditioned pulp to obtain filtrate and a filter cake; allowing the filtrate to be subjected to an electro-catalysis reaction to obatin electro-catalysis post-liquid ; adding a calcium and magnesium ion precipitant and a flotation agent into the electrocatalytic post-liquid, and carrying out oxidative degradation to obtain a degradation liquid; and filtering the degradation liquid, then adjusting the pH value of the effluent to 5-7, and adding an ion adsorbent for adsorption to obtain treated effluent. According to the method, the waste water-based mud is treated according to the steps of tempering, solid-liquid separation, electrocatalytic reaction, oxidative degradation, pH value adjustment and ion adsorbent adsorption, harmless treatment and resource utilization can be more sufficiently carried out on the waste water-based mud, and therefore the cost of oil field drilling and fracturing operation is greatly reduced.

Description

technical field [0001] The invention relates to the field of petroleum / petrochemical environmental protection, in particular to a method for harmless treatment of waste water-based mud. Background technique [0002] Petroleum companies are high-input, high-tech, high-risk, high-return industries, usually using mobile operations, and their production layout is scattered, with industrial and mining areas intersecting with farmland, urban areas and even residential areas, with unique production technology and underground water injection. , polymer injection flooding, stimulation operations and other production links are intricate. These characteristics determine that during the exploration, development and construction of oilfields, the pollution of formation surface water sources is relatively strong. Recently, oilfields at all levels have put forward the construction concept of "green oilfields", made great efforts and attempts in the process of exploration and development, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/148C02F11/122C02F9/06C02F103/10
CPCC02F11/148C02F11/122C02F9/00C02F1/001C02F1/28C02F1/46C02F1/56C02F1/52C02F1/66C02F1/72C02F2103/10
Inventor 杨忠平王占生云箭李春晓陈曦秦磊李颖李秀敏王薏涵
Owner BC P INC CHINA NAT PETROLEUM CORP
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