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Well drilling wastewater flocculation precipitation treatment device and wastewater treating method

A technology for drilling wastewater and sedimentation treatment, applied in flocculation/sedimentation water/sewage treatment, mining wastewater treatment, water/sewage multi-stage treatment, etc. Achieve the effect of reducing land occupation area, improving water purification efficiency and reducing land cost

Inactive Publication Date: 2012-10-31
四川省环保科技工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 1. The flocculant is usually used by directly adding the flocculant to the waste water tank where the drilling wastewater is stored. The drilling waste water and the flocculant react in the waste water tank. Since the waste water tank is temporarily built on the drilling site, there is usually no stirring device installed. The flocculant and the flocculant The response time of drilling wastewater is long and there is a problem of insufficient reaction
[0011] 2. When adding low-solubility flocculants such as slaked lime, due to its low solubility, it is usually necessary to add excessive flocculants, and a large amount of flocculants will be deposited in the waste water tank, which not only causes waste of flocculants, but also occupies the capacity of the waste water tank
[0012] 3. Since the drilling wastewater contains more polar soluble substances, it is difficult to effectively treat the pollutants and chroma in the wastewater by only using conventional flocculants to treat the drilling wastewater, and the treated drilling wastewater cannot meet the requirements of drilling construction. required, not reusable
[0013] 4. At present, the modified storage ponds of oil and gas fields during the drilling period need to occupy a large amount of surrounding land, resulting in high project land costs and a high risk of environmental pollution from the stored sewage

Method used

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  • Well drilling wastewater flocculation precipitation treatment device and wastewater treating method
  • Well drilling wastewater flocculation precipitation treatment device and wastewater treating method
  • Well drilling wastewater flocculation precipitation treatment device and wastewater treating method

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Embodiment 1

[0046] Such as Figure 1 to Figure 6 As shown, the drilling wastewater flocculation and sedimentation treatment device in this embodiment is provided with a flocculation reaction tank 1 with a stirring device 2, and a flocculation settlement tank 3 and an intermediate tank 4 arranged at the well site, and the flocculation reaction tank 1 is provided with a water supply port connected to the outside 1a, dosing port 1b and drain port 1c, a communication valve is arranged between the flocculation sedimentation tank and the intermediate tank 4, and the two ends of the communication valve connect the upper water body of the flocculation sedimentation tank with the intermediate tank 4, when the liquid in the flocculation sedimentation tank After the position is higher and the connecting valve is opened, the liquid in the flocculation sedimentation tank flows into the middle tank 4 . A first water pump 5 is arranged between the flocculation settling tank 3 and the flocculation reacti...

Embodiment 2

[0049] Such as Figure 1 to Figure 6 As shown, the flocculation reaction tank 1 in this embodiment includes a first tank body 101 and a second tank body 102, the water supply port 1a is arranged on the top of the first tank body 101, and the stirring device 2 is arranged on the first tank body 101, between the first tank body 101 and the second tank body 102 is provided with a through-pipe 7, and one end of the through-pipe 7 communicates with the inside of the first tank body 101 from the side of the first tank body 101 , the other end of the through pipe 7 is connected to the inside of the second tank body 102 from the top of the second tank body 102, the drain port 1c is arranged on the side of the second tank body 102, and the second tank body 102 A secondary reaction water inlet 8 is arranged on the top, and the secondary reaction water inlet 8 is arranged on the side of the second tank body 102 and connected to the inside of the second tank body 102 along the tangential ...

Embodiment 3

[0062] Such as Figure 1 to Figure 6 As shown, the flocculation and sedimentation tank 3 in the drilling wastewater flocculation and sedimentation treatment device of this embodiment includes an adjacent debris pool 22 and a turbid water pool 23, and the side of the debris pool 22 adjacent to the turbid water pool 23 is provided with three Connecting port 24, in other embodiments, the quantity of communicating port 24 also can be one, two or several, and described debris pool 22 is provided with water inlet ramp 25 away from the side of turbid water pool 23, described The bottom surface of the debris pool 22 slopes downward along the direction from the water inlet ramp 25 to the connecting port 24 , the bottom of the turbid water pool 23 is conical, and the water inlet end of the first water pump 5 is connected to the inside of the turbid water pool 23 . After the drilling waste water is introduced into the cuttings pool 22, the silt with a relatively large proportion will set...

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Abstract

The invention relates to a well drilling wastewater flocculation precipitation treatment device. The device comprises a flocculation reaction tank, a flocculation settling basin and an intermediate tank, the flocculation reaction tank is provided with a stirring device, the flocculation settling basin and the intermediate tank are arranged on a well site, the flocculation reaction tank is provided with a water feeding port, a chemical feed port and a water discharge port, the water feeding port, the chemical feed port and the water discharge port are communicated to the outside, a communication valve is arranged between the flocculation settling basin and the intermediate tank, a first water pump is disposed between the flocculation settling basin and the flocculation reaction tank, the flocculation settling basin is communicated with a water inlet end of the first water pump, a water outlet end of the first water pump is communicated with the flocculation reaction tank, the flocculation reaction tank is communicated with the flocculation settling basin and the intermediate tank which are arranged on the well site to form a water circulation to collaboratively store water bodies, defects that the transportation is difficult, and uniform stirring is hardly achieved when the flocculation reaction tank is oversize are overcome, the required volume of the flocculation settling basin is reduced, besides, the water bodies formed by well drilling wastewater and flocculating agents are maintained in a flow state all the time, and the dissolving efficiency of the flocculating agents is improved.

Description

technical field [0001] The invention relates to a sewage treatment device and a sewage treatment method, in particular to a drilling wastewater flocculation sedimentation treatment device and a method for treating wastewater by using the device. Background technique [0002] In the process of drilling in oil and gas fields, the wastewater formed due to the loss of mud during tripping operations, the leakage of the mud circulation system, and the flushing of mud and oil on ground equipment and drilling tools is called drilling wastewater. Drilling wastewater is an important source of pollution for petroleum exploration enterprises. Drilling wastewater has the characteristics of many points, wide area, complex types of pollutants, high stability, intermittent discharge and difficult discharge control. It is a source of water pollution that is difficult to manage and dispose of in the petroleum industry. one. [0003] Drilling wastewater contains various components in the mud,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F1/465C02F1/52C02F1/56C02F103/10
Inventor 田庆华杨斌中王维孙蜀任永杰钟润之徐鹏
Owner 四川省环保科技工程有限责任公司
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