CN210193571U

CN210193571U - Slurry treatment system

Info

Publication number: CN210193571U
Application number: CN201921090451.3U
Authority: CN
Inventors: Zhengbing Fu; 付正兵; Yi Zhang; 张翼; Wenbin Liu; 刘文彬; Yang Du; 杜杨
Original assignee: YICHANG SHENDA PETROMACHINE CO Ltd
Current assignee: Yichang Shenda Technology Co., Ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2020-03-27
Anticipated expiration: 2029-07-12

Abstract

The utility model provides a slurry treatment system, which comprises a horizontal centrifuge, wherein a slurry conveying pipeline and an additive pipeline are connected at a feed inlet of the horizontal centrifuge, a neutralization stirring device is connected at a solid material outlet of the horizontal centrifuge, and a sedimentation tank is connected at a liquid outlet of the horizontal centrifuge; the neutralizing and stirring device comprises a rack and a mixing barrel fixedly connected to the rack, the bottom of the mixing barrel is provided with a rotating shaft through a bearing seat, the part of the rotating shaft extending into the mixing barrel is provided with a spiral stirring blade, and one end of the rotating shaft extending into the rack is connected with a driving motor; the top of the mixing barrel is communicated with a solid material outlet of the horizontal centrifuge, and the lower part of the mixing barrel is provided with a discharge pipe for discharging materials; the frame is also provided with a material conveying mechanism for adding lime powder into the mixing barrel; the sedimentation tank is also provided with a liquid adding tank for adding a coagulant into the sedimentation tank. The phenomenon that the discharged solid impurities and waste liquid have secondary pollution to the environment after solid-liquid separation is improved.

Description

Slurry treatment system

Technical Field

The utility model relates to a mud treatment facility field, concretely relates to mud processing system.

Background

In the process of oil drilling, drilling mud needs to be circularly injected to reinforce the hole wall, the residual waste drilling mud contains impurities such as clay, weighting materials, sewage, dirty oil and the like after the drilling is finished, a mixture in a solid-liquid mixed state is formed, a centrifuge is adopted to carry out solid-liquid separation in the conventional treatment of the mixture, waste liquid is discharged, solid impurities are buried, the buried depth is 1.5m to 3m below the ground, and harmful components remained in the solid impurities and the waste liquid still cause secondary pollution to the environment.

SUMMERY OF THE UTILITY MODEL

Not enough to exist among the prior art, the utility model provides a mud processing system has solved solid-state impurity and the waste liquid that solid-liquid separation back discharged and has had secondary pollution's problem to the environment.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a slurry treatment system comprises a horizontal centrifuge, wherein a slurry conveying pipeline and an additive pipeline are connected to a feed inlet of the horizontal centrifuge, a neutralization stirring device is connected to a solid material outlet of the horizontal centrifuge, and a sedimentation tank is connected to a liquid outlet of the horizontal centrifuge; the neutralizing and stirring device comprises a rack and a mixing barrel fixedly connected to the rack, a rotating shaft is mounted at the bottom of the mixing barrel through a bearing seat, a spiral stirring blade is arranged at the part of the rotating shaft extending into the mixing barrel, and one end of the rotating shaft extending into the rack is connected with a driving motor; the top of the mixing barrel is communicated with a solid material outlet of the horizontal centrifuge, and the lower part of the mixing barrel is provided with a discharge pipe for discharging materials; the frame is also provided with a material conveying mechanism for adding lime powder into the mixing barrel; and the sedimentation tank is also provided with a liquid adding tank for adding a coagulant into the sedimentation tank.

Preferably, the material conveying mechanism comprises a blower arranged on the rack, an air outlet of the blower is connected to the top of the mixing barrel through a material guide pipe, and a feeding pipe used for adding lime powder to the air outlet is further arranged on the blower.

Preferably, the slurry conveying pipeline comprises a screw pump, a feed inlet of the screw pump is connected with a feed pipe, and a discharge outlet of the screw pump is connected with a discharge pipe connected with the horizontal centrifuge; a butterfly valve is arranged on the feeding pipe; and a flowmeter is arranged on the discharge pipe.

Preferably, a crushing and cutting machine is installed on the position, between the butterfly valve and the screw pump, of the feeding pipe.

Preferably, the additive pipeline comprises a liquid conveying pipe connected to the discharge pipe and located at the rear end of the flow meter, and the liquid conveying pipe is sequentially provided with an electromagnetic valve and a one-way valve.

Preferably, the liquid inlet end of the liquid conveying pipe is connected with an additive tank.

Preferably, a material conveying auger convenient for discharging materials is arranged in the material discharging pipe.

Compared with the prior art, the utility model discloses following beneficial effect has:

conveying the drilling mud into a horizontal centrifuge through a mud conveying pipe, conveying an alkaline solution into the horizontal centrifuge through an additive pipeline, mixing and separating the drilling mud in the horizontal centrifuge, conveying solid materials into a mixing barrel, continuously adding lime powder for neutralization, and reducing harmful components contained in the solid materials discharged from the mixing barrel; conveying the liquid separated from the horizontal centrifuge to a sedimentation tank, adding a coagulant, then precipitating, and further neutralizing harmful components before discharging; and the solid materials and the liquid discharged into the environment can be prevented from secondary pollution by carrying out neutralization treatment again after separation.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a neutralizing and stirring device;

in the figure, a horizontal centrifuge 1, a slurry conveying pipeline 2, a screw pump 21, a feeding pipe 22, a discharging pipe 23, a flowmeter 24, a butterfly valve 25, a crushing cutter 26, an additive pipeline 3, a liquid conveying pipe 31, an electromagnetic valve 32, a one-way valve 33, a neutralization stirring device 4, a frame 41, a mixing barrel 42, a rotating shaft 43, a spiral stirring blade 44, a driving motor 45, a discharging pipe 46, a blower 47, a material guide pipe 48, a feeding pipe 49, a sedimentation tank 5 and a liquid adding tank 6.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

As shown in fig. 1, the utility model provides a mud processing system, including horizontal centrifuge 1, horizontal centrifuge 1's feed inlet department is connected with mud pipeline 2 and additive pipeline 3, at horizontal centrifuge 1 operation in-process, all carries mud and additive to get into, carries out solid-liquid separation after the stirring mixes, in order to guarantee the continuation of disengaging process, chooses for use horizontal centrifuge 1's model for LW800 x 2200, improves and mixes separation efficiency. The slurry conveying pipeline 2 comprises a screw pump 21, a feeding hole of the screw pump 21 is connected with a feeding pipe 22, and a discharging hole of the screw pump 21 is connected with a discharging pipe 23 connected with the horizontal centrifuge 1; a butterfly valve 25 is arranged on the feeding pipe 22; the discharge pipe 23 is provided with a flow meter 24, slurry is conveyed to the horizontal centrifuge 1 through the screw pump 21, the conveying amount is counted and checked through the flow meter 24, the amount of the additive conveyed to the horizontal centrifuge 1 is convenient to adjust, and the conveying amount in a pipeline is adjusted through the butterfly valve 25 in the slurry conveying process.

Meanwhile, in order to avoid the situation that the screw pump 21 or the pipeline is blocked by solids contained in the slurry, a crushing cutter 26 is arranged on the position, between the butterfly valve 25 and the screw pump 21, of the feeding pipe 22, and the solids contained in the slurry are crushed by the crushing cutter 26, wherein the crushing cutter 26 is an existing product and can be purchased and has the model of PG-12, and the flange type connection is convenient for disassembly, maintenance or repair on the pipeline.

In the process of conveying the slurry to the horizontal centrifuge 1, the additive is conveyed simultaneously, the additive can be preliminarily neutralized when the first half section of the horizontal centrifuge 1 is mixed, solid materials in the slurry can be rapidly solidified and are convenient to separate, the adopted additive is alkaline liquid and is conveyed through an additive pipeline 3, the additive pipeline 3 comprises a liquid conveying pipe 31 which is connected to a discharge pipe 23 and is positioned at the rear end of a flow meter 24, an electromagnetic valve 32 and a one-way valve 33 are sequentially arranged on the liquid conveying pipe 31, and the slurry in the discharge pipe 23 can be prevented from entering the liquid conveying pipe 31 through the action of the one-way valve 33; meanwhile, the liquid flow in the infusion tube 31 is adjusted through the electromagnetic valve 32; an additive tank is connected to the liquid inlet pipe of the liquid conveying pipe 31, and the flowing of slurry in the discharge pipe 23 has a driving effect on the additive in the liquid conveying pipe 31, so that the additive tank is installed to ensure the height difference of the flowing of the additive in the liquid conveying pipe 31.

After solid-liquid separation is carried out in the horizontal centrifuge 1, solid materials are discharged through a solid material outlet of the horizontal centrifuge 1, waste liquid is discharged through a liquid outlet of the horizontal centrifuge 1, a neutralization stirring device 4 is connected to the solid material outlet of the horizontal centrifuge 1, and a sedimentation tank 5 is connected to the liquid outlet of the horizontal centrifuge 1; the solid materials entering the interior are further neutralized and uniformly stirred by the neutralization stirring device 4, so that harmful components in the solid materials are neutralized as much as possible and then are conveniently discharged for landfill, and secondary pollution is avoided; the waste liquid also contains substances which can be continuously precipitated, and the substances in the waste liquid are precipitated by adding a coagulant into the sedimentation tank 5; the sedimentation tank 5 is also provided with a liquid adding tank 6 for adding a coagulant into the sedimentation tank.

As shown in fig. 2, the neutralizing and stirring device 4 includes a frame 41 and a mixing barrel 42 fixedly connected to the frame 41, a rotating shaft 43 is installed at the bottom of the mixing barrel 42 through a bearing seat, a spiral stirring blade 44 is disposed at a position where the rotating shaft 43 extends into the mixing barrel 42, and one end of the rotating shaft 43 extending into the frame 41 is connected to a driving motor 45; the top of the mixing barrel 42 is communicated with a solid material outlet of the horizontal centrifuge 1, and the lower part of the mixing barrel 42 is provided with a discharge pipe 46 for discharging; a material conveying mechanism for adding lime powder into the mixing barrel 42 is further arranged on the frame 41; the material conveying mechanism comprises an air blower 47 arranged on the rack 41, an air outlet on the air blower 47 is connected to the top of the mixing barrel 42 through a material guide pipe 48, a feeding pipe 49 used for adding lime powder to the air outlet is further arranged on the air blower 47, the lime powder is fed to the air outlet on the air blower 47 through the feeding pipe 49 and then conveyed into the mixing barrel 42 through air generated by the air blower 47, the solid materials in the mixing barrel 42 are fully mixed and stirred by the spiral stirring blades 44 under the driving of the driving motor 45, the lime powder can be adhered to the solid materials, harmful substances can be neutralized after the solid materials are subsequently buried, and secondary pollution caused by burying is effectively avoided; the uniformly mixed solid material is discharged through a discharge pipe 46 and subsequently can be transferred to a mud cake machine for cake making.

In order to continuously discharge the solid material entering the discharge pipe 46, a material conveying auger convenient for discharging is arranged in the discharge pipe 46.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. A slurry treatment system comprising a horizontal centrifuge (1), characterized in that: a slurry conveying pipeline (2) and an additive pipeline (3) are connected to a feed inlet of the horizontal centrifuge (1), a neutralization stirring device (4) is connected to a solid material outlet of the horizontal centrifuge (1), and a sedimentation tank (5) is connected to a liquid outlet of the horizontal centrifuge (1);

the neutralizing and stirring device (4) comprises a rack (41) and a mixing barrel (42) fixedly connected to the rack (41), a rotating shaft (43) is mounted at the bottom of the mixing barrel (42) through a bearing seat, a spiral stirring blade (44) is arranged at the part of the rotating shaft (43) extending into the mixing barrel (42), and one end of the rotating shaft (43) extending into the rack (41) is connected with a driving motor (45); the top of the mixing barrel (42) is communicated with a solid material outlet of the horizontal centrifuge (1), and the lower part of the mixing barrel (42) is provided with a discharge pipe (46) for discharging materials; the rack (41) is also provided with a material conveying mechanism for adding lime powder into the mixing barrel (42);

and a liquid adding tank (6) for adding a coagulant into the sedimentation tank (5) is also arranged on the sedimentation tank.

2. A slurry treatment system according to claim 1, wherein: the material conveying mechanism comprises a blower (47) installed on the rack (41), an air outlet of the blower (47) is connected to the top of the mixing barrel (42) through a material guide pipe (48), and a feeding pipe (49) used for adding lime powder to the air outlet is further arranged on the blower (47).

3. A slurry treatment system according to claim 1 or 2, wherein: the slurry conveying pipeline (2) comprises a screw pump (21), a feeding hole of the screw pump (21) is connected with a feeding pipe (22), and a discharging hole of the screw pump (21) is connected with a discharging pipe (23) connected with the horizontal centrifuge (1); a butterfly valve (25) is arranged on the feeding pipe (22); and a flowmeter (24) is arranged on the discharge pipe (23).

4. A slurry treatment system according to claim 3, wherein: and a crushing cutter (26) is arranged on the position, between the butterfly valve (25) and the screw pump (21), of the feeding pipe (22).

5. A slurry treatment system according to claim 3, wherein: the additive pipeline (3) comprises an infusion tube (31) which is connected to the discharge tube (23) and is positioned at the rear end of the flowmeter (24), and an electromagnetic valve (32) and a one-way valve (33) are sequentially installed on the infusion tube (31).

6. A system for treating sludge as claimed in claim 5, wherein: the liquid inlet end of the liquid conveying pipe (31) is connected with an additive tank.

7. A slurry treatment system according to claim 3, wherein: a material conveying auger convenient for discharging materials is arranged in the material discharging pipe (46).