Treatment device and treatment method for waste drilling fluid

A technology for drilling waste fluid and treatment device, which is applied in mining waste water treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. The effect of accelerating flocculation, improving work efficiency and reducing production costs

Inactive Publication Date: 2015-04-08
江锐
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the drilling waste fluid with high fluidity, short cycle and large changes in the water quality of the waste fluid, flocculation, sedimentation, filtration, electrolytic sedimentation, etc. are usually used for treatment. The existing flocculation treatment devices and methods for drilling waste fluid usually have flocculation Long time, need to build a large flocculation tank, large area, inconvenient transportation, large water demand and other problems

Method used

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  • Treatment device and treatment method for waste drilling fluid

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Effect test

Embodiment 1

[0030] The treatment device for drilling waste fluid in this embodiment includes a main mixing pipe (2), an acid pipe (7), a water inlet pipe (1), a collection bin (10), a coagulant aid tank (11), and a flocculant storage bin (13 ), a mixing tank (15), characterized in that: the coagulant aid tank (11) and the flocculant storage bin (13) are respectively connected to the main mixing pipe (2), and the mixing tank (15) is connected to the flocculant storage bin (13) , the acid pipe (7) is connected to the main mixing pipe (2) through the acid injection metering pump (8), and the main mixing pipe (2) is provided with a flow meter (5) and a static mixer (6).

[0031] The top of the coagulant aid tank (11) is provided with a feed funnel (17a) connected to the water inlet pipe (1), the inside is provided with an agitator (16a), and the bottom is provided with a pipeline connected to the inlet of the coagulant aid metering pump (18) , the outlet end of the coagulant aid metering pump...

Embodiment 2

[0042] The method for treating drilling waste liquid with a drilling waste liquid treatment device comprises the following steps:

[0043] a. Add water to dilute drilling waste fluid, the ratio of water to drilling waste fluid is 5:1;

[0044] b. The diluted drilling waste fluid enters the main mixing pipe, and the flow rate of the drilling waste fluid is controlled by a flow meter, and the flow rate is controlled at 0.02m 3 / s~0.03m 3 / s, the acid liquid in the acid pipe is pumped into the main mixing pipe through the acid injection metering pump, the pumping volume is 0.02~0.2mL / s, and the acid liquid adjusts the pH value of the drilling waste fluid between 6.5~7.5;

[0045] c. Add the coagulant aid into the coagulant aid tank through the feeding funnel, add clean water through the water inlet pipe, the ratio of clear water to coagulant aid is 20:1, start the agitator to stir the coagulant aid and clear water for 2~6 minutes, Pump the mixed coagulant aid into the main mixi...

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Abstract

The invention discloses a treatment device and treatment method for waste drilling fluid. The device comprises a main mixing pipe, an acid pipe, a water inlet pipe, a collecting bin, a coagulant aid tank, a flocculant reserve bin, and a mixing tank. The coagulant aid tank is connected to the main mixing pipe through a coagulant aid metering pump, the flocculant reserve bin is connected to the main mixing pipe through a metering pump, the mixing tank is in connection with the flocculant reserve bin through a centrifugal pump, the acid pipe is connected to the main mixing pipe through an acid injection metering pump, and the main mixing pipe is provided with a flowmeter, a pressure gage and a static mixer. Waste drilling fluid undergoes flocculation directly through the main mixing pipe, storage flocculation is not needed, the work efficiency is improved, and meanwhile reduce the volume of the device is reduced, thus being convenient for transportation. The upper layer purified water can be recycled, water resources are saved and the cost is reduced, and dilution, acid injection and adding of the coagulant aid accelerate the flocculation reaction speed.

Description

technical field [0001] The invention relates to a treatment device and method for waste liquid, in particular to a treatment device for drilling waste liquid and a method for using the device to treat drilling waste liquid. Background technique [0002] During the exploration and development of oil and gas, a large amount of drilling waste fluid will be produced. Drilling waste fluid mainly contains pollutants such as drilling cuttings, bentonite, organic high-group treatment agents, inorganic salts, weighting materials, sewage, oil, and soluble trace elements. It has complex pollutant components, high load, high COD value, and chroma It has become one of the main pollutants that affect the environment in the process of oil and gas exploitation. Therefore, how to treat and utilize drilling waste fluid is an urgent problem to be solved. For the treatment of drilling waste fluid, the treatment method commonly used in the prior art is chemical coagulation method, among which c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/10
Inventor 江锐
Owner 江锐
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