阅读说明：本技术 钻井液废弃物处理工艺及钻井液废弃物处理装置 (Drilling fluid waste treatment process and drilling fluid waste treatment device ) 是由 王延东 王腾飞 严向阳 于 2019-10-21 设计创作，主要内容包括：本发明提供了一种钻井液废弃物处理工艺及钻井液废弃物处理装置,涉及钻井液废弃物处理技术领域,本发明提供的钻井液废弃物处理工艺,包括：对钻井液废弃物进行无害化处理；将所述钻井液废弃物固液分离；将固液分离得到的固相物进行脱水处理。本发明提供的钻井液废弃物处理工艺缓解了现有技术中钻井液废弃物难以处理的技术问题,能够消除废弃物中的有害物,并分别处理固体废物和液体废物。(The invention provides a drilling fluid waste treatment process and a drilling fluid waste treatment device, which relate to the technical field of drilling fluid waste treatment, and the drilling fluid waste treatment process provided by the invention comprises the following steps: performing harmless treatment on the drilling fluid waste; solid-liquid separation of the drilling fluid waste; and (4) dehydrating the solid phase obtained by solid-liquid separation. The drilling fluid waste treatment process provided by the invention alleviates the technical problem that the drilling fluid waste is difficult to treat in the prior art, can eliminate harmful substances in the waste, and respectively treats solid waste and liquid waste.)

1. A drilling fluid waste treatment process is characterized by comprising the following steps:

performing harmless treatment on the drilling fluid waste;

solid-liquid separation of the drilling fluid waste;

and (4) dehydrating the solid phase obtained by solid-liquid separation.

2. The drilling fluid waste treatment process of claim 1, wherein the step of harmlessly treating comprises:

adjusting the pH value of the drilling fluid waste to 7-9;

and reducing the heavy metal ions in the drilling fluid waste from a high valence state to a low valence state.

3. The drilling fluid waste treatment process of claim 1, wherein the step of harmlessly treating comprises:

a sulfate precipitation agent containing ferrous ions is mixed with the drilling fluid waste to precipitate heavy metal ions in the drilling fluid waste.

4. The drilling fluid waste treatment process of claim 1, further comprising:

purifying the liquid phase obtained by the solid-liquid separation and/or purifying the liquid phase obtained by the dehydration treatment.

5. A drilling fluid waste treatment device, comprising:

a stirring reaction device (100), wherein the stirring reaction device (100) is used for mixing drilling fluid waste with a medicament to realize harmless treatment;

a solid-liquid separation device (200) communicated with the stirring reaction device (100), wherein the solid-liquid separation device (200) is used for carrying out solid-liquid separation on the drilling fluid waste after harmless treatment;

and a dewatering device (300) that communicates with the solid-liquid separation device (200), wherein the dewatering device (300) is configured to dewater a solid substance obtained by solid-liquid separation.

6. Drilling fluid waste treatment device according to claim 5, characterized in that the solid-liquid separation means (200) comprise: a settling tank (210), a settling piece (220) and a mud scraping piece (230);

the sedimentation member (220) is connected in the sedimentation tank (210) for the settled solid phase to be attached;

the scraper (230) is arranged above the sedimentation member (220), and the scraper (230) is used for scraping the solid-phase substances attached to the surface of the sedimentation member (220).

7. The drilling fluid waste treatment device of claim 5, further comprising a first liquid treatment tank (400), the first liquid treatment tank (400) being used for deodorization, oxidative gel breaking and purification;

the first liquid treatment tank (400) is in communication with a first liquid phase outlet (212) of the solid-liquid separation means (200) and/or the first liquid treatment tank (400) is in communication with a second liquid phase outlet of the dewatering means (300).

8. The drilling fluid waste treatment device of claim 7, further comprising a dosing device (500);

the first liquid treatment tank (400) is provided with a liquid inlet and a liquid outlet, a first treatment area, a second treatment area and a third treatment area are sequentially arranged between the liquid inlet and the liquid outlet, and the first treatment area, the second treatment area and the third treatment area are respectively communicated with the dosing device (500);

the dosing device (500) is for adding a first medicament to the first treatment zone, a second medicament to the second treatment zone, and a third medicament to the third treatment zone.

9. The drilling fluid waste treatment device according to claim 8, wherein the dosing means (500) is in communication with the agitation reaction means (100), and the dosing means (500) is further used for adding a medicament to the agitation reaction means (100).

10. The drilling fluid waste treatment apparatus of claim 7, further comprising a second liquid treatment tank (600), wherein a liquid outlet of the first liquid treatment tank (400) is in fluid communication with the second liquid treatment tank (600);

the second liquid treatment tank (600) is used for removing oil, suspended matters or sterilizing.

Technical Field

The invention relates to the technical field of drilling fluid waste treatment, in particular to a drilling fluid waste treatment process and a drilling fluid waste treatment device.

Background

In oil exploration and development and later adjustments, well sites often leave large amounts of drilling waste water, waste drilling mud, and drill cuttings stored in pit ponds. Contamination of ground water and surface water may occur due to seepage, spillage, flooding, etc. of the pit. In addition, solid-phase waste and liquid-phase waste are mixed, so that pollutants are difficult to treat and reuse, and liquid harmful substances doped in the solid waste pollute soil during burying treatment, so that the difficulty in harmless treatment of the drilling fluid waste is very high.

Disclosure of Invention

The invention aims to provide a drilling fluid waste treatment process and a drilling fluid waste treatment device, so as to solve the technical problem that the drilling fluid waste is difficult to treat in the prior art.

In a first aspect, the invention provides a process for treating drilling fluid waste, comprising: performing harmless treatment on the drilling fluid waste; solid-liquid separation of the drilling fluid waste; and (4) dehydrating the solid phase obtained by solid-liquid separation.

With reference to the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the step of performing the harmless treatment includes: adjusting the pH value of the drilling fluid waste to 7-9; and reducing the heavy metal ions in the drilling fluid waste from a high valence state to a low valence state.

With reference to the first aspect, the present invention provides a second possible implementation manner of the first aspect, wherein the step of performing the harmless treatment includes: a sulfate precipitation agent containing ferrous ions is mixed with the drilling fluid waste to precipitate heavy metal ions in the drilling fluid waste.

With reference to the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein the drilling fluid waste treatment process further includes: purifying the liquid phase obtained by the solid-liquid separation and/or purifying the liquid phase obtained by the dehydration treatment.

In a second aspect, the present invention provides a drilling fluid waste treatment device, comprising:

a stirring reaction device for mixing drilling fluid waste with a medicament to achieve harmless treatment;

the solid-liquid separation device is communicated with the stirring reaction device and is used for carrying out solid-liquid separation on the drilling fluid waste after harmless treatment;

and a dewatering device communicated with the solid-liquid separation device, wherein the dewatering device is used for dewatering the solid-phase object obtained by solid-liquid separation.

In combination with the second aspect, the present invention provides a first possible embodiment of the second aspect, wherein the solid-liquid separation device comprises: a settling tank, a settling piece and a mud scraping piece; the sedimentation piece is connected in the sedimentation tank and is used for the settled solid phase to attach; the mud scraping piece is arranged above the settling piece and used for scraping the solid-phase objects attached to the surface of the settling piece.

In combination with the second aspect, the present invention provides a second possible embodiment of the second aspect, wherein the drilling fluid waste treatment apparatus further comprises a first liquid treatment tank, the first liquid treatment tank is used for deodorization, oxidative gel breaking and purification; the first liquid treatment tank is communicated with a first liquid phase outlet of the solid-liquid separation device, and/or the first liquid treatment tank is communicated with a second liquid phase outlet of the dehydration device.

In combination with the second possible embodiment of the second aspect, the present invention provides a third possible embodiment of the second aspect, wherein the drilling fluid waste treatment device further comprises a dosing device; the first liquid treatment tank is provided with a liquid inlet and a liquid outlet, a first treatment area, a second treatment area and a third treatment area are sequentially arranged between the liquid inlet and the liquid outlet, and the first treatment area, the second treatment area and the third treatment area are respectively communicated with the dosing device; the dosing device is used for adding a first medicament to the first treatment area, adding a second medicament to the second treatment area, and adding a third medicament to the third treatment area.

In combination with the third possible embodiment of the second aspect, the present invention provides a fourth possible embodiment of the second aspect, wherein the drug adding device is in communication with the stirring reaction device, and is further used for adding a medicament to the stirring reaction device.

In combination with the second possible implementation manner of the second aspect, the present invention provides a fifth possible implementation manner of the second aspect, wherein the drilling fluid waste treatment apparatus further comprises a second liquid treatment tank, and a liquid outlet of the first liquid treatment tank is in fluid communication with the second liquid treatment tank; the second liquid treatment tank is used for removing oil, suspended matters or sterilizing.

The embodiment of the invention has the following beneficial effects: the adoption carries out innocent treatment to the drilling fluid discarded object, will drilling fluid discarded object solid-liquid separation to and carry out dehydration's mode with the solid-phase thing that solid-liquid separation obtained, eliminate the harmful substance in the discarded object through innocent treatment, rethread solid-liquid separation and with the further dehydration of solid-phase thing, thereby can handle solid waste and liquid waste respectively, recycle after the refuse treatment of being convenient for, and can reduce the liquid content in the solid waste, reduce the risk that solid waste spread the pollution.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic diagram of a drilling fluid waste treatment device provided in an embodiment of the present invention;

FIG. 2 is a schematic diagram of a solid-liquid separation device of a drilling fluid waste treatment device provided by an embodiment of the invention;

fig. 3 is a schematic diagram of a stirring reaction device of the drilling fluid waste treatment device according to an embodiment of the present invention.

Icon: 100-stirring a reaction device; 110-a stirred reaction vessel; 111-a third inlet; 112-a third liquid phase outlet; 113-a second solid phase outlet; 114-a fourth treatment zone; 115-a fifth treatment zone; 116-a sixth treatment zone; 120-a stirring assembly; 121-stirring shaft; 122-a blade; 123-a drive device; 200-a solid-liquid separation device; 210-a settling tank; 211 — a first inlet; 212-a first liquid phase outlet; 213-first solid phase outlet; 220-a precipitation member; 230-a mud scraper; 300-a dehydration device; 310-a first filter press device; 320-a second filter pressing device; 400-a first liquid treatment tank; 500-a dosing device; 600-a second liquid treatment tank; 700-a drilling platform; 800-slurry deposition tank.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "physical quantity" in the formula, unless otherwise noted, is understood to mean a basic quantity of a basic unit of international system of units, or a derived quantity derived from a basic quantity by a mathematical operation such as multiplication, division, differentiation, or integration.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.