CN217323755U - Well drilling effluent disposal system - Google Patents
Well drilling effluent disposal system Download PDFInfo
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- CN217323755U CN217323755U CN202123431272.1U CN202123431272U CN217323755U CN 217323755 U CN217323755 U CN 217323755U CN 202123431272 U CN202123431272 U CN 202123431272U CN 217323755 U CN217323755 U CN 217323755U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The utility model discloses a drilling wastewater treatment system, which comprises a pretreatment system and a deep treatment system which are connected in sequence; the pretreatment system comprises a first adjusting tank, a first coagulation tank, a first flocculation tank, a first sedimentation tank, a first Fenton reaction device, a second coagulation tank, a second flocculation tank and a second sedimentation tank which are connected in sequence; the advanced treatment system comprises a USAB anaerobic tank, an activated sludge tank and a third sedimentation tank which are connected in sequence. The drilling wastewater treatment system of the utility model has stable operation, simple flow and high treatment efficiency; utilize the utility model discloses a well drilling effluent disposal system handles well drilling waste water, goes out water quality of water and can satisfy the petroleum class and be less than or equal to 4mg/L, and COD is less than or equal to 100 mg/L.
Description
Technical Field
The utility model relates to a waste water treatment technical field, in particular to well drilling effluent disposal system.
Background
The petroleum exploration wastewater is classified according to different procedures and is roughly divided into two types, namely drilling wastewater, acid fracturing operation wastewater and the like. Drilling wastewater and acid fracturing operation wastewater are main pollution sources in the production process of petroleum and natural gas enterprises. According to statistics, each drilling team discharges about 30m of wastewater per day 3 100-200m of wastewater generated by each fracturing well 3 100-200m waste water is discharged from each acidification well 3 . The drilling wastewater has the characteristics of a plurality of points, wide range, complex pollutant types, intermittent discharge, uncontrollable discharge and the like, and becomes one of the wastewater pollution sources which are difficult to manage and treat in the petroleum industry. The drilling wastewater contains various components in the slurry, the composition is complex, and main pollutants comprise suspended matters, heavy metals, oil, phenol, sulfides and the like. The composition and concentration of the slurry change with the change of slurry systems (calcium-treated slurry, polymer slurry, sulfonated slurry and the like). The drilling wastewater has the characteristics of high chromaticity, high content of suspended matters, high CODcr value and poor biodegradability of organic matters. The conventional microbiological method for treating the drilling wastewater can not meet the effluent requirement.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem that the existing drilling wastewater treatment system can not meet the requirement of wastewater effluent, one of the purposes of the utility model is to provide a drilling wastewater treatment system.
In order to realize the purpose, the utility model adopts the technical scheme that:
a drilling wastewater treatment system comprises a pretreatment system and an advanced treatment system which are connected in sequence; the pretreatment system comprises a first adjusting tank, a first coagulation tank, a first flocculation tank, a first sedimentation tank, a first Fenton reaction device, a second coagulation tank, a second flocculation tank and a second sedimentation tank which are connected in sequence; the advanced treatment system comprises a USAB anaerobic tank, an activated sludge tank and a third sedimentation tank which are connected in sequence.
Preferably, the drilling wastewater treatment system, the pretreatment system further comprises a first pH adjusting tank; the first pH adjusting tank is arranged between the first adjusting tank and the first coagulation tank; further preferably, a pH meter is arranged in the first pH adjusting tank; still further preferably, an aeration device and a stirring device are arranged in the first pH adjusting tank.
Preferably, in the drilling wastewater treatment system, an aeration device and a stirring device are arranged inside the first coagulation basin.
Preferably, in the drilling wastewater treatment system, a stirring device is arranged inside the first flocculation tank.
Preferably, the drilling wastewater treatment system, the pretreatment system further comprises a second pH adjusting tank; the second pH adjusting tank is arranged between the first sedimentation tank and the first Fenton reaction device; further preferably, a pH meter is arranged in the second pH adjusting tank; still further preferably, an aeration device and a stirring device are arranged in the second pH adjusting tank.
Preferably, the drilling wastewater treatment system, the pretreatment system further comprises a micro-electrolysis cell; the micro-electrolysis cell is arranged between the second pH adjusting cell and the first Fenton reaction device; further preferably, an aeration device is arranged inside the micro-electrolysis cell; the micro-electrolysis cell is flushed by air and water.
Preferably, in the drilling wastewater treatment system, the first fenton reaction device is internally provided with a mechanical stirring device.
Preferably, in the drilling wastewater treatment system, the first fenton reaction device is internally provided with an oxidation-reduction potential monitoring device.
Preferably, in the drilling wastewater treatment system, the second coagulation tank is internally provided with an aeration device and a stirring device.
Preferably, in the drilling wastewater treatment system, a stirring device is arranged inside the second flocculation tank.
Preferably, the inside of the drilling wastewater treatment system, the USAB anaerobic tank, is provided with an oxidation-reduction potential monitoring device.
Preferably, the drilling wastewater treatment system further comprises a dosing tank; the dosing tank is arranged between the activated sludge tank and the third sedimentation tank; further preferably, a stirring device is arranged in the dosing tank; adding a microbial flocculant into the dosing tank; the microbial flocculant can be a commercially available product.
Preferably, the drilling wastewater treatment system further comprises an intermediate water tank; the intermediate water tank is arranged between the pretreatment system and the advanced treatment system; and a conductivity monitoring device is arranged inside the middle water tank.
Preferably, the deep treatment system of the drilling wastewater treatment system can also be a second Fenton reaction device, a third coagulation tank, a third flocculation tank and a fourth sedimentation tank which are connected in sequence; further preferably, when the conductivity in the middle water tank is less than 5000 mus/cm, the advanced treatment system comprises a USAB anaerobic tank, an activated sludge tank, a dosing tank and a third sedimentation tank which are connected in sequence; when the conductivity in the middle water pool is more than 5000 mu s/cm, the advanced treatment system comprises a second Fenton reaction device, a third coagulation pool, a third flocculation pool and a fourth sedimentation pool which are connected in sequence.
Further preferably, in the drilling wastewater treatment system, the second fenton reaction device is internally provided with a stirring device.
Further preferably, in the drilling wastewater treatment system, the second fenton reaction device is internally provided with an oxidation-reduction potential monitoring device.
Further preferably, in the drilling wastewater treatment system, an aeration device and a stirring device are arranged in the third coagulation tank.
Further preferably, in the drilling wastewater treatment system, a stirring device is arranged inside the third flocculation tank.
The beneficial effects of the utility model are that:
the drilling wastewater treatment system of the utility model has stable operation, simple flow and high treatment efficiency; utilize the utility model discloses a well drilling effluent disposal system handles well drilling waste water, goes out water quality of water and can satisfy the petroleum class and be less than or equal to 4mg/L, and COD is less than or equal to 100 mg/L.
Drawings
FIG. 1 is a diagram of a system for treating drilling wastewater;
FIG. 2 is a diagram of an embodiment of a drilling wastewater treatment system.
Detailed Description
The embodiments of the present invention will be described in detail below, and the embodiments described with reference to the drawings are only illustrative and are not to be construed as limiting the present invention.
The present invention will be described in further detail with reference to specific examples.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected to each other, indirectly connected to each other through an intermediate member, or connected to each other through the inside of two members. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The starting materials, reagents or equipment used in the examples are, unless otherwise specified, either conventionally commercially available or may be obtained by methods known in the art. Unless otherwise indicated, the testing or testing methods are conventional in the art.
As shown in figure 1, the system for treating the waste water containing the drilling well comprises a first adjusting tank, a first coagulation tank, a first flocculation tank, a first sedimentation tank, a first Fenton reaction device, a second coagulation tank, a second flocculation tank, a second sedimentation tank, a USAB anaerobic tank, an activated sludge tank and a third sedimentation tank which are connected in sequence.
A drilling wastewater treatment system according to an embodiment of the present invention is described below with reference to fig. 2.
As shown in fig. 2, in an embodiment of the drilling wastewater treatment system, wastewater sequentially passes through a first adjusting tank, a first pH adjusting tank, a first coagulation tank, a first flocculation tank, a first sedimentation tank, a second pH adjusting tank, a first fenton reaction device, a second coagulation tank, a second flocculation tank, a second sedimentation tank, an intermediate tank and an advanced treatment system 1, and the advanced treatment system 1 is a USAB anaerobic tank, an activated sludge tank, a dosing tank and a third sedimentation tank which are sequentially connected to realize wastewater treatment. Or the wastewater sequentially passes through a first adjusting tank, a first pH adjusting tank, a first coagulation tank, a first flocculation tank, a first sedimentation tank, a second pH adjusting tank, a first Fenton reaction device, a second coagulation tank, a second flocculation tank, a second sedimentation tank, an intermediate water tank and an advanced treatment system 2, and the advanced treatment system 2 is a second Fenton reaction device, a third coagulation tank, a third flocculation tank and a fourth sedimentation tank which are sequentially connected, so that the wastewater treatment is realized.
As shown in fig. 2, in some embodiments of the present invention, the drilling wastewater first enters the first adjusting tank to mix the wastewater uniformly, and then is conveyed to the first pH adjusting tank by a pump to adjust the pH, wherein the pH is 8-9, and the hydraulic retention time of the first pH adjusting tank is 1 h; the effluent of the first pH adjusting tank enters a first coagulation tank, and is stirred by air blast, and the hydraulic retention time in the first coagulation tank is 1 h; the effluent in the first coagulation tank enters a first flocculation tank, mechanical stirring is adopted, and the hydraulic retention time in the first flocculation tank is 1 h; the effluent of the first flocculation tank enters a first sedimentation tank, the hydraulic retention time of the first sedimentation tank is 6 hours, and the surface load q is 0.5-0.9m 3 /(m 2 H); the effluent of the first sedimentation tank enters a second pH adjusting tank, and is stirred by air blasting, and the hydraulic retention time of the second pH adjusting tank is 1 h; the effluent of the second pH adjusting pool enters a first Fenton reaction device, mechanical stirring is adopted, and the oxidation-reduction potential in the first Fenton reaction device is 300-400 mV; the effluent of the first Fenton reaction device enters a second coagulation tank, and is stirred by air blasting, a coagulant is added, and the hydraulic retention time is 1 h; the effluent of the second coagulation tank enters a second flocculation tank, a flocculating agent is added, the second flocculation tank is mechanically stirred, and the hydraulic retention time is 1 h; the effluent of the second flocculation tank enters a second sedimentation tank, the hydraulic retention time of the second sedimentation tank is 6h, and the surface load q is 0.5-0.9m 3 /(m 2 H), the sludge precipitated in the second sedimentation tank and the first sedimentation tank enters a materialized sludge tank for additional treatment; the effluent of the second sedimentation tank enters an intermediate water tank, when the conductivity in the intermediate water tank is less than 5000 mu s/cm, the effluent of the intermediate water tank enters a USAB anaerobic tank, an activated sludge tank, a dosing tank and a third sedimentation tank, the effluent of the third sedimentation tank reaches the standard and is discharged, the hydraulic retention time of the USAB anaerobic tank is 120h, an aeration device is arranged in the activated sludge tank, the volume of air and water is larger than that of the USAB anaerobic tank1, the hydraulic retention time of the activated sludge tank is 48 hours, the dosing tank adopts mechanical stirring, the hydraulic retention time of the dosing tank is 1 hour, and a microbial flocculant is added into the dosing tank; the hydraulic retention time of the third sedimentation tank is 6h, and the surface load q is 0.5-0.9m 3 /(m 2 H). When the conductivity in the middle water pool is more than 5000 mu s/cm, the effluent of the middle water pool enters a second Fenton reaction device, a third coagulation pool, a third flocculation pool and a fourth sedimentation pool, the effluent of the fourth sedimentation pool reaches the standard and is discharged, the second Fenton reaction device adopts mechanical stirring, the hydraulic retention time is 24 hours, hydrogen peroxide and ferrous sulfate are added, and the oxidation-reduction potential is 400-500 mV; in the third coagulation tank, blast stirring is adopted, and the hydraulic retention time in the third coagulation tank is 1 h; in the third flocculation tank, mechanical stirring is adopted, and the hydraulic retention time is 1 h; the fourth sedimentation tank has hydraulic retention time of 6h and surface load q of 0.5-0.9m 3 /(m 2 ·h)。
Application examples
The drilling wastewater treatment system of the embodiment is adopted to treat drilling wastewater. The water quality of a drilling wastewater is shown in table 1 below:
TABLE 1 drilling wastewater quality of raw water
Wastewater treatment was carried out using the drilling wastewater treatment system shown in figure 2. The contaminant removal rates for the various treatment stages are shown in table 2 below.
TABLE 2 Effect of different treatment stages
Through the utility model discloses a drilling waste water after effluent disposal system handles can satisfy the petroleum class and be less than or equal to 4mg/L, and COD is less than or equal to 100 mg/L.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the invention, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A drilling wastewater treatment system is characterized by comprising a pretreatment system and an advanced treatment system which are connected in sequence; the pretreatment system comprises a first adjusting tank, a first coagulation tank, a first flocculation tank, a first sedimentation tank, a first Fenton reaction device, a second coagulation tank, a second flocculation tank and a second sedimentation tank which are connected in sequence; the advanced treatment system comprises a USAB anaerobic tank, an activated sludge tank and a third sedimentation tank which are connected in sequence.
2. The drilling wastewater treatment system of claim 1, wherein the pretreatment system further comprises a first pH adjustment tank; the first pH adjusting tank is arranged between the first adjusting tank and the first coagulation tank.
3. The drilling wastewater treatment system of claim 1, wherein the pretreatment system further comprises a second pH adjustment tank; the second pH adjusting tank is arranged between the first sedimentation tank and the first Fenton reaction device.
4. The drilling wastewater treatment system of claim 3, wherein the pretreatment system further comprises a micro-electrolysis cell; the micro-electrolysis cell is arranged between the second pH adjusting cell and the first Fenton reaction device.
5. The drilling wastewater treatment system according to claim 4, wherein an aeration device is arranged inside the micro-electrolysis cell.
6. The drilling wastewater treatment system according to claim 1, wherein the first Fenton reaction device is internally provided with a stirring device.
7. The drilling wastewater treatment system of claim 1, wherein the advanced treatment system further comprises a dosing tank; the dosing tank is arranged between the activated sludge tank and the third sedimentation tank.
8. The drilling wastewater treatment system of claim 1, wherein an oxidation-reduction potential monitoring device is arranged in the USAB anaerobic tank.
9. The drilling wastewater treatment system of claim 1, further comprising an intermediate water basin; the intermediate water tank is arranged between the pretreatment system and the advanced treatment system; and a conductivity monitoring device is arranged in the middle water tank.
10. The drilling wastewater treatment system according to claim 9, wherein the advanced treatment system further comprises a second Fenton reaction device, a third coagulation tank, a third flocculation tank and a fourth sedimentation tank which are connected in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123431272.1U CN217323755U (en) | 2021-12-30 | 2021-12-30 | Well drilling effluent disposal system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123431272.1U CN217323755U (en) | 2021-12-30 | 2021-12-30 | Well drilling effluent disposal system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217323755U true CN217323755U (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123431272.1U Active CN217323755U (en) | 2021-12-30 | 2021-12-30 | Well drilling effluent disposal system |
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| CN (1) | CN217323755U (en) |
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2021
- 2021-12-30 CN CN202123431272.1U patent/CN217323755U/en active Active
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