CN217323756U - Acidizing fracturing effluent disposal system - Google Patents
Acidizing fracturing effluent disposal system Download PDFInfo
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- CN217323756U CN217323756U CN202123437586.2U CN202123437586U CN217323756U CN 217323756 U CN217323756 U CN 217323756U CN 202123437586 U CN202123437586 U CN 202123437586U CN 217323756 U CN217323756 U CN 217323756U
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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 an acidizing and fracturing wastewater treatment system, which comprises a pretreatment system and a deep treatment system which are connected in sequence; the pretreatment system comprises a first regulating tank, an air flotation tank, a micro-electrolysis tank, a first Fenton reaction device, a first coagulation tank, a first flocculation tank and a first sedimentation tank which are connected in sequence; the advanced treatment system comprises a USAB anaerobic tank, an activated sludge tank and a second sedimentation tank which are connected in sequence. The acidification fracturing wastewater treatment system of the utility model has stable operation, simple flow and high treatment efficiency; utilize the utility model discloses an acidizing fracturing wastewater treatment system handles acidizing fracturing waste water, goes out water quality of water and can satisfy that the petroleum class is 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 acidizing fracturing effluent disposal system.
Background
The petroleum exploration wastewater is classified according to different procedures and 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. The acid fracturing operation is one of the main measures for increasing the yield of oil and gas wells, the waste water discharged in the operation contains guanidine gum, formaldehyde, petroleum and other various additives, and has the characteristics of multiple points, wide range, high pollutant concentration, dispersed pollution sources and large discharge amount, and if the waste water is not treated, the waste water is discharged outside, so that the pollution is caused to the surrounding environment. The acidized and fractured wastewater has high COD Cr High stability, high viscosity and the like, and has high standard treatment difficulty, thereby becoming the key and difficult point of the environment-friendly standard treatment of the industrial sewage of the oil and gas field. The conventional microbiological method for treating the acid fracturing wastewater cannot meet the effluent requirement.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem that the current acidizing fracturing effluent disposal system can't satisfy the waste water requirement of going out water, one of the purposes of the utility model is to provide an acidizing fracturing effluent disposal system.
In order to realize the purpose, the utility model adopts the technical scheme that:
an acidizing and fracturing 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, an air floatation tank, a micro-electrolysis tank, a first Fenton reaction device, a first coagulation tank, a first flocculation tank and a first sedimentation tank which are connected in sequence; the advanced treatment system comprises a USAB anaerobic tank, an activated sludge tank and a second sedimentation tank which are connected in sequence.
Preferably, the pretreatment system of the acid fracturing wastewater treatment system further comprises a first pH adjusting tank; the first pH adjusting tank is arranged between the first adjusting tank and the air floating 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, the pretreatment system of the acid fracturing wastewater treatment system further comprises a second pH adjusting tank; the second pH adjusting tank is arranged between the air floatation tank and the micro-electrolysis tank; further preferably, a pH meter is arranged in the second pH adjusting pool; still further preferably, an aeration device and a stirring device are arranged in the second pH adjusting tank.
Preferably, the acidification and fracturing wastewater treatment system is characterized in that an aeration device is arranged inside the micro-electrolytic tank; the micro-motor pool is flushed by air and water.
Preferably, in the acid fracturing wastewater treatment system, a stirring device is arranged inside the first fenton reaction device.
Preferably, in the acid fracturing wastewater treatment system, an oxidation-reduction potential monitoring device is arranged inside the first Fenton reaction device.
Preferably, in the acid fracturing wastewater treatment system, an aeration device and a stirring device are arranged inside the first coagulation tank.
Preferably, in the acid fracturing wastewater treatment system, a stirring device is arranged inside the first flocculation tank.
Preferably, the acidizing and fracturing wastewater treatment system further comprises a dosing tank; the dosing tank is arranged between the activated sludge tank and the second sedimentation tank; further preferably, a stirring device is arranged in the dosing pool; and adding a microbial flocculant into the dosing tank.
Preferably, in the acidizing and fracturing wastewater treatment system, an oxidation-reduction potential monitoring device is arranged in the USAB anaerobic tank.
Preferably, the acid fracturing 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 advanced treatment system of the acidizing and fracturing wastewater treatment system can also be a second Fenton reaction device, a second coagulation tank, a second flocculation tank and a third 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 second 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 second coagulation pool, a second flocculation pool and a third sedimentation pool which are connected in sequence.
Further preferably, in the acid fracturing wastewater treatment system, a stirring device is arranged inside the second fenton reaction device.
Further preferably, in the acidizing fracturing wastewater treatment system, an oxidation-reduction potential monitoring device is arranged inside the second fenton reaction device.
Further preferably, in the acidizing and fracturing wastewater treatment system, an aeration device and a stirring device are arranged inside the second coagulation tank.
Further preferably, in the acid fracturing wastewater treatment system, a stirring device is arranged inside the second flocculation tank.
The utility model has the advantages that:
the acidification fracturing wastewater treatment system of the utility model has stable operation, simple flow and high treatment efficiency; utilize the utility model discloses an acidizing fracturing effluent disposal system handles acidizing fracturing 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 treatment system for acidizing fracturing wastewater;
fig. 2 is a diagram of an embodiment of an acid fracturing 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, indirectly connected through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill 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 acidized fracturing wastewater treatment system comprises a first regulating reservoir, an air flotation tank, a micro-electrolysis tank, a first Fenton reaction device, a first coagulation tank, a first flocculation tank, a first sedimentation tank, a USAB anaerobic tank, an activated sludge tank and a second sedimentation tank which are sequentially connected.
An acid fracturing 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 acid fracturing wastewater treatment system, wastewater sequentially passes through a first adjusting tank, a first pH adjusting tank, an air flotation tank, a second pH adjusting tank, a micro-electrolysis tank, a first fenton reaction device, a first coagulation tank, a first flocculation tank, a first 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 second sedimentation tank which are sequentially connected, so as to realize wastewater treatment. Or the wastewater sequentially passes through a first adjusting tank, a first pH adjusting tank, an air floatation tank, a second pH adjusting tank, a micro-electrolysis tank, a first Fenton reaction device, a first coagulation tank, a first flocculation tank, a first 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 second coagulation tank, a second flocculation tank and a third 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 acidizing fracturing wastewater first enters a first adjusting tank to mix the wastewater uniformly, and then is conveyed to a first pH adjusting tank by a pump to adjust the pH, wherein the pH is 8 to 8.5, a demulsifier is added into the first pH adjusting tank, and the hydraulic retention time is 1 h; the effluent of the first pH adjusting tank enters an air flotation tank, a coagulant is added into the air flotation tank, the hydraulic retention time of the air flotation tank is 3 hours, and the surface load q is 1-2m 3 /(m 2 H); the effluent of the air floatation tank enters a second pH adjusting tank, and is stirred by blast air, and the hydraulic retention time of the second pH adjusting tank is 1 h; the effluent of the second pH adjusting tank enters a micro-electrolysis tank, an aeration type iron-carbon micro-electrolysis treatment process is adopted, air-water combined flushing is adopted, and the hydraulic retention time is 12 hours; the effluent of the micro-electrolysis cell enters a first Fenton reaction device, mechanical stirring is adopted, the first Fenton reaction device only needs to add hydrogen peroxide and does not need to add ferrous iron, the oxidation-reduction potential in the first Fenton reaction device is 300-400mV, and the hydraulic retention time is 24 hours; the effluent of the first Fenton reaction device enters a first coagulation tank, blast stirring is adopted, a coagulant is added, and the hydraulic retention time is 1 h; the effluent of the first coagulation tank enters a first flocculation tank, a flocculating agent is added, the first flocculation tank is mechanically stirred, and the hydraulic retention time 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 sludge in the first sedimentation tank and the air floatation tank enters a materialized sludge tank for additional treatment; the effluent of the first 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 second sedimentation tank, the effluent of the second 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 ratio of air to water is (18-20):1, the hydraulic retention time of the activated sludge tank is 48h, and the dosing tank is used for feedingThe method adopts mechanical stirring, the hydraulic retention time of a dosing pool is 1h, a microbial flocculant is added into the dosing pool, the hydraulic retention time of a second sedimentation pool 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 second coagulation pool, a second flocculation pool and a third sedimentation pool, the effluent of the third sedimentation pool is discharged after reaching the standard, 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 second coagulation tank, blast stirring is adopted, and the hydraulic retention time in the second coagulation tank is 1 h; in the second flocculation tank, mechanical stirring is adopted, and the hydraulic retention time is 1 h; 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)。
Application examples
The treatment system of the embodiment is adopted to treat the acidizing fracturing wastewater. The water quality of a certain acidified fracturing wastewater is shown in table 1 below:
TABLE 1 acidizing fracturing wastewater raw water quality
The wastewater treatment was carried out using the acid fracturing 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
The acidizing fracturing waste water after the waste water treatment system of the utility model is used for treating can meet the requirement that petroleum is 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. An acidizing fracturing wastewater treatment system is characterized by comprising a pretreatment system and a deep treatment system which are sequentially connected; the pretreatment system comprises a first regulating tank, an air floatation tank, a micro-electrolysis tank, a first Fenton reaction device, a first coagulation tank, a first flocculation tank and a first sedimentation tank which are connected in sequence; the advanced treatment system comprises a USAB anaerobic tank, an activated sludge tank and a second sedimentation tank which are connected in sequence.
2. The acidizing fracturing wastewater treatment system of claim 1 wherein said pretreatment system further comprises a first pH adjustment tank; the first pH adjusting tank is arranged between the first adjusting tank and the air floating tank.
3. The acidizing fracturing wastewater treatment system of claim 1 wherein said pretreatment system further comprises a second pH adjustment tank; the second pH adjusting tank is arranged between the air floatation tank and the micro-electrolysis tank.
4. The acidizing and fracturing wastewater treatment system according to claim 1, wherein an aeration device is arranged inside the micro-electrolysis cell.
5. The acidizing fracturing wastewater treatment system of claim 1 wherein said first Fenton reaction device is internally provided with a stirring device.
6. The acidizing and fracturing wastewater treatment system according to claim 5, wherein an oxidation-reduction potential monitoring device is arranged inside the first Fenton reaction device.
7. The acid fracturing 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 second sedimentation tank.
8. The acidizing fracturing wastewater treatment system of claim 1 wherein an oxidation-reduction potential monitoring device is arranged inside said USAB anaerobic tank.
9. The acid fracturing 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 acid fracturing wastewater treatment system of claim 9, wherein the advanced treatment system further comprises a second Fenton reaction device, a second coagulation tank, a second flocculation tank and a third sedimentation tank which are connected in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123437586.2U CN217323756U (en) | 2021-12-30 | 2021-12-30 | Acidizing fracturing effluent disposal system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123437586.2U CN217323756U (en) | 2021-12-30 | 2021-12-30 | Acidizing fracturing effluent disposal system |
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| CN217323756U true CN217323756U (en) | 2022-08-30 |
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| CN202123437586.2U Active CN217323756U (en) | 2021-12-30 | 2021-12-30 | Acidizing fracturing effluent disposal system |
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