Fracturing acidizing waste liquid treatment device

Abstract

The utility model relates to a fracturing acidizing waste liquid treatment device, which relates to the technical field of fracturing flow-back liquid waste water treatment, and comprises a reaction tank, a reaction tower and a settling pond which are sequentially arranged, iron-carbon particles forming a local primary battery are arranged in the reaction tank, and the reaction tower is connected with the reaction tank through a first conveying assembly. A chemical box for adding chemicals into the reaction tower is arranged on the reaction tower, the sedimentation tank is connected with the reaction tower through a second conveying assembly, and a sludge discharge pump is arranged on the sedimentation tank. The fracturing acidizing waste liquid is introduced into the reaction tank, the acid environment is firstly used for carrying out micro-electrolysis reaction to destroy the stability of the waste liquid, reduce the viscosity and chromaticity of the waste liquid and reduce the COD (chemical oxygen demand) level in the waste liquid, and then chemical reaction treatment is carried out, so that the dosage of chemicals is reduced, and the reaction efficiency of the chemicals and the waste liquid is also improved; therefore, the treatment efficiency of the fracturing acidizing waste liquid is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fracturing flowback fluid wastewater treatment, in particular to a fracturing acidification waste liquid treatment device. Background Technique

[0002] Fracturing acidification, abbreviated as acid fracturing, refers to the fracturing operation without proppant using acid fluid as the fracturing fluid under a pressure higher than the formation fracture pressure. During the acid fracturing process, the wall surface of the fracture is corroded into an uneven surface by the corrosion of the acid fluid, so that after the pump is stopped and the pressure is relieved, the fracture wall surface will not completely close, thus having a higher conductivity and obvious effect on restoring and improving the production capacity of oil wells. The waste liquid discharged from the wellbore after the fracturing construction will have an impact on the environment if directly discharged, so it needs to be treated.

[0003] In the related technology, reference can be made to the Chinese utility model patent with the authorization announcement number CN212025017U, which discloses a new type of fracturing fluid flowback liquid treatment device, including a flowback liquid tank, a tubular reactor and an oxidation separation tank. By connecting one end of the riser tube close to the tubular reactor with the port of the liquid medicine tube, the flow rate of the liquid medicine is controlled by an electromagnetic flowmeter during use, so as to improve the mixing uniformity of the flowback liquid and the liquid medicine. Through the direct chemical reaction between the liquid medicine and the flowback liquid, the reactants are introduced into the oxidation separation tank for air flotation separation to achieve the treatment of the flowback liquid.

[0004] However, the acidification fluid used in acid fracturing is usually mainly mud acid, and external reagents such as demulsifiers, stabilizers and guar gum are added to improve the construction performance. Therefore, the flowback liquid after acid fracturing construction often has characteristics such as high acidity, high stability, high viscosity and high content of suspended solids. Therefore, the treatment method of directly reacting with chemical agents not only has low efficiency, but also increases the dosage of the agents and the treatment cost, thus reducing the treatment efficiency of the fracturing acidification waste liquid. Content of the Utility Model

[0005] In order to improve the treatment efficiency of the fracturing acidification waste liquid, the utility model provides a fracturing acidification waste liquid treatment device.

[0006] A fracturing acidification waste liquid treatment device provided by this application adopts the following technical scheme:

[0007] A fracturing acidification waste liquid treatment device includes a reaction tank, a reaction tower and a sedimentation tank arranged in sequence. Iron-carbon particles are arranged in the reaction tank. The reaction tower is connected with the reaction tank through a first conveying component. A medicine box for adding medicine into the reaction tower is arranged on the reaction tower. The sedimentation tank is connected with the reaction tower through a second conveying component. A sludge pump is arranged on the sedimentation tank.

[0008] By adopting the above technical solution, the fracturing acidification waste liquid is introduced into the reaction tank for micro-electrolysis reaction. Since the waste liquid itself has a high acidity, iron is corroded to form divalent iron ions. The high-potential metal is used to displace the low-potential metal, that is, iron filings are used to remove the pollutants in the waste liquid whose potential is lower than that of iron ions, so that some pollutants in the waste liquid are flocculated and precipitated at the bottom of the reaction tank. At the same time, the iron-carbon particles adsorb some pollutants on the surface. The preliminarily treated waste liquid mixture enters the reaction tower through the first conveying component. Chemicals are added to the reaction tower through the medicine box. After the chemicals react with the waste liquid, they enter the sedimentation tank for sedimentation. The sediment is discharged, and the supernatant is discharged or recycled later. First, the micro-electrolysis reaction is carried out in an acidic environment to destroy the stability of the waste liquid, reduce the viscosity and chromaticity of the waste liquid, and reduce the COD (chemical oxygen demand) level in the waste liquid. Then, the drug reaction treatment is carried out, which not only reduces the dosage of the medicine but also improves the reaction efficiency of the medicine and the waste liquid, thus improving the treatment efficiency of the fracturing acidification waste liquid.

[0009] Optionally, a plurality of packing plates are sequentially arranged in the reaction tank from bottom to top. Iron-carbon particles are stacked on each of the plurality of packing plates. A water inlet pipe is coaxially and fixedly arranged in the reaction tank, and the water inlet pipe extends below the packing plate. A water distributor is arranged at one end of the water inlet pipe located in the reaction tank.

[0010] By adopting the above technical solution, the waste liquid overflows from the water distributor after flowing through the water inlet pipe. The waste liquid sequentially passes through a plurality of packing plates from bottom to top and undergoes a micro-electrolysis reaction with the iron-carbon particles. The waste liquid after multi-stage reaction enters the reaction tower through the first conveying component, while the sediment remains at the bottom of the reaction tank, thereby realizing the pretreatment of the fracturing acidification waste liquid to improve the subsequent treatment effect.

[0011] Optionally, the first conveying component includes:

[0012] A first water outlet pipe, which is arranged on the reaction tank and above the packing plate;

[0013] A first conveying pump, the suction end of the first conveying pump is connected to the first water outlet pipe, and the conveying end of the first conveying pump is connected to the reaction tower through a first conveying pipe.

[0014] By adopting the above technical solution, the waste liquid is treated by a plurality of packing plates. The preliminarily treated waste liquid is collected above the reaction tank. When the first conveying pump is started, the waste liquid enters the reaction tower through the first water outlet pipe and the first conveying pipe under the suction action, thereby realizing the conveyance of the waste liquid.

[0015] Optionally, a stirrer is arranged on the reaction tower, and the stirrer is used to mix the waste liquid and the liquid medicine in the reaction tower.

[0016] By adopting the above technical solution, the waste liquid enters the reaction tower, drugs are added into the reaction tower through the medicine box, and the stirrer is started to mix the drugs with the waste liquid, so as to improve the reaction efficiency of the drugs and the waste liquid, thereby improving the treatment efficiency of the fracturing acidification waste liquid.

[0017] Optionally, hydrogen peroxide is contained in the medicine box, a flowmeter is provided on the first delivery pipe, a medicine delivery pipe extending into the reaction tower is provided on the medicine box, and a medicine adding pump is provided on the medicine delivery pipe.

[0018] By adopting the above technical solution, hydrogen peroxide has the ability to oxidize various organic substances under the catalytic action of divalent iron ions, and the waste liquid contains divalent iron ions and trivalent iron ions. Trivalent iron ions can not only generate ferric hydroxide precipitation with hydroxide ions, but also produce a complex reaction with pollutants to make the pollutants precipitate. The waste liquid after microelectrolysis provides divalent iron ions for the subsequent reaction, and cooperates with hydrogen peroxide to oxidize the pollutants. The amount of waste liquid entering the reaction tower is known through the flowmeter, and the amount of hydrogen peroxide added is controlled by the medicine adding pump. After adding the medicine, the stirrer is started to make hydrogen peroxide and the waste liquid fully mixed and react. The stirred waste liquid mixture enters the sedimentation tank through the second delivery component. The precipitate settles to the bottom of the sedimentation tank, and the supernatant is reserved for subsequent use. The amount of medicine added is controlled according to the waste liquid treatment amount, thereby reducing the dosage of the medicine. By first performing microelectrolysis treatment on the waste liquid using the acidic environment of the waste liquid itself, and then using the divalent iron ions generated by microelectrolysis and the oxidation of hydrogen peroxide to cooperate in treating the waste liquid, the cost is saved while the treatment efficiency of the fracturing acidification waste liquid is improved.

[0019] Optionally, the stirrer includes a stirring paddle and a motor. The stirring paddle is rotatably arranged in the reaction tower and is spiral, and the motor is arranged on the reaction tower and is used to drive the stirring paddle to rotate.

[0020] By adopting the above technical solution, when the motor is started, it drives the stirring paddle to rotate, and the stirring paddle agitates to make the waste liquid and the drugs mix evenly, thereby improving the reaction efficiency of the drugs and the waste liquid.

[0021] Optionally, the second delivery component includes:

[0022] A second water outlet pipe, which is communicated with the reaction tower;

[0023] A second delivery pump, the suction end of the second delivery pump is connected to the second water outlet pipe, and the delivery end of the second delivery pump is provided with a second delivery pipe, and the second delivery pipe extends into the sedimentation tank.

[0024] By adopting the above technical solution, the waste liquid after stirring and reacting enters the sedimentation tank through the second water outlet pipe and the second delivery pipe under the action of the second delivery pump for sedimentation, so as to realize the delivery of the waste liquid.

[0025] Optionally, it further includes a pretreatment tank, in which a filter element is provided. The filter element is used to filter the suspended matter in the waste liquid, and one end of the water inlet pipe far from the reaction tank is connected to the pretreatment tank through a water transfer pump.

[0026] By adopting the above technical solution, the waste liquid is first introduced into the pretreatment tank, the suspended matter remains on the filter element, and the filtered waste liquid enters the reaction tank through the transfer pump. The waste liquid is first filtered to reduce the content of large particle impurities and suspended matter in the waste liquid, thereby improving the subsequent treatment effect and thus improving the treatment efficiency of the fracturing acidification waste liquid.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The fracturing acidification waste liquid is introduced into the reaction tank. First, the microelectrolysis reaction is carried out in the acidic environment to destroy the stability of the waste liquid, reduce the viscosity and chromaticity of the waste liquid, and reduce the COD (chemical oxygen demand) level in the waste liquid. Then, the drug reaction treatment is carried out, which not only reduces the dosage of the drug but also improves the reaction efficiency between the drug and the waste liquid. Therefore, the treatment efficiency of the fracturing acidification waste liquid is improved.

[0029] 2. The waste liquid is treated by using the cooperation of divalent iron ions generated by microelectrolysis and hydrogen peroxide oxidation, thereby saving costs while improving the treatment efficiency of the fracturing acidification waste liquid.

[0030] 3. The waste liquid is first introduced into the pretreatment tank, the suspended matter remains on the filter element, and the waste liquid is first filtered to reduce the content of large particle impurities and suspended matter in the waste liquid, thereby improving the subsequent treatment effect and thus improving the treatment efficiency of the fracturing acidification waste liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is the overall structural schematic diagram of the present application;

[0032] Figure 2 is the exploded view of the filter element in the present application;

[0033] Figure 3 is the structural schematic diagram of the filter element in the present application;

[0034] Figure 4 is the structural schematic diagram of the filler plate and the water distributor in the present application, in which the reaction tank is partially sectioned;

[0035] Figure 5 is the structural schematic diagram of the stirrer in the present application.

[0036] Reference numerals: 1, reaction tank; 11, packing plate; 111, water through-hole; 112, water through-groove; 12, water inlet pipe; 13, water transfer pump; 14, water distributor; 141, connector; 142, water distribution pipe; 143, water distribution hole; 15, exhaust pipe; 16, sludge outlet pipe; 2, reaction tower; 21, chemical tank; 211, chemical transfer pipe; 212, chemical dosing pump; 22, stirrer; 221, stirring paddle; 222, motor; 23, timer; 24, stirring shaft; 25, liquid outlet pipe; 3, sedimentation tank; 31, sludge discharge pump; 32, sludge suction pipe; 33, drain pipe; 34, water suction pump; 4, first conveying assembly; 41, first water outlet pipe; 42, first conveying pump; 421, first conveying pipe; 422, flow meter; 5, second conveying assembly; 51, second water outlet pipe; 52, second conveying pump; 521, second conveying pipe; 6, pretreatment tank; 61, filter element; 611, installation part; 612, inclined part; 613, horizontal part; 62, installation groove; 63, filter hole. Detailed implementation manners

[0037] The following further describes the present application in detail with reference to the Figures 1 - 5 accompanying drawings.

[0038] An embodiment of the present application discloses a fracturing acidification waste liquid treatment device.

[0039] Referring to Figure 1 , a fracturing acidification waste liquid treatment device includes a reaction tank 1, a reaction tower 2 and a sedimentation tank 3 arranged in sequence. Iron-carbon particles are provided in the reaction tank 1. The reaction tower 2 is connected to the reaction tank 1 through a first conveying assembly 4. A chemical tank 21 for adding chemicals into the reaction tower 2 is provided on the reaction tower 2. The sedimentation tank 3 is connected to the reaction tower 2 through a second conveying assembly 5. A sludge discharge pump 31 is provided on the sedimentation tank 3.

[0040] Referring to Figure 1 and Figure 2 , the fracturing acidification waste liquid treatment device further includes a pretreatment tank 6. The pretreatment tank 6 is located at the front end of the reaction tank 1. A filter element 61 for filtering suspended solids in the waste liquid is provided in the pretreatment tank 6. The filter element 61 includes an integrally formed installation part 611, an inclined part 612 and a horizontal part 613. Concave installation grooves 62 are provided on the upper surfaces of the opposite side walls of the pretreatment tank 6. The installation part 611 extends horizontally and is placed in the installation groove 62. The length of the installation part 611 is greater than the distance between the two installation grooves 62.

[0041] Referring to Figure 2 and Figure 3The inclined portion 612 is located at the side of the mounting portion 611 and extends obliquely downward. The two side edges of the inclined portion 612 abut against the two opposite inner walls of the pretreatment tank 6. The horizontal portion 613 is located at one end of the inclined portion 612 away from the mounting portion 611 and extends horizontally. The end of the horizontal portion 613 away from the inclined portion 612 abuts against the inner wall of the pretreatment tank 6. Both the horizontal portion 613 and the inclined portion 612 have filter holes 63 for blocking suspended matter.

[0042] Reference Figure 1 and Figure 2 The fracturing acidification waste liquid is first introduced into the pretreatment tank 6 from between the horizontal part 613 and the inclined part 612. The horizontal part 613 and the inclined part 612 intercept the suspended matter. The mounting part 611 is moved away from the mounting tank 62, which can drive the inclined part 612 and the horizontal part 613 to be away from the pretreatment tank 6. Then, the suspended matter can be cleaned up, thereby reducing the content of large particle impurities and suspended matter in the waste liquid, thereby improving the subsequent treatment effect.

[0043] Reference Figure 1 and Figure 4 A plurality of packing plates 11 are sequentially arranged in the reaction tank 1 from bottom to top. In this embodiment, only three packing plates 11 are taken as an example for description. A plurality of water holes 111 are arranged on the packing plates 11. Iron-carbon particles (not shown in the figure) are piled on the plurality of packing plates 11. The iron-carbon particles are common commercially available materials. A symmetrically arranged water groove 112 is arranged on the packing plate 11. The length of the water groove 112 is less than the radius of the packing plate 11, and the width of the water groove 112 is greater than the diameter of the water hole 111 to improve the water passing effect. The diameter of the iron-carbon particles is greater than the width of the water groove 112.

[0044] Reference Figure 1 , Figure 2 and Figure 4 A water inlet pipe 12 is coaxially fixed in the reaction tank 1. The water inlet pipe 12 vertically penetrates through multiple filler plates 11. The water inlet pipe 12 extends out of the reaction tank 1. One end of the water inlet pipe 12 away from the reaction tank 1 is connected to the pretreatment tank 6 through a water pump 13.

[0045] Reference Figure 1 and Figure 4 The bottom end of the water inlet pipe 12 extends to the bottom of the filler plate 11. A water distributor 14 is provided at the bottom of the water inlet pipe 12. The water distributor 14 includes a connector 141 and a plurality of water distribution pipes 142. The connector 141 is hollow and coaxially connected to the water inlet pipe 12. The plurality of water distribution pipes 142 are arranged in a circular array around the axis of the connector 141 and are connected to the connector 141. The water distribution pipe 142 has a plurality of water distribution holes 143 facing the filler plate 11.

[0046] Reference Figure 1 and Figure 4, the top of the reaction tank 1 is provided with an exhaust pipe 15 for exhausting gas, a pressure relief valve (not shown in the figure) is provided on the exhaust pipe 15, the bottom end of the reaction tank 1 is provided with a sludge discharge pipe 16 communicating with the inside of the reaction tank 1, and a sludge discharge valve for controlling opening and closing is provided on the sludge discharge pipe 16.

[0047] Refer to Figure 1 and Figure 4 , the filtered waste liquid is sprayed out after flowing through the water inlet pipe 12 and the water distributor 14 under the action of the water transfer pump 13. As the liquid level in the reaction tank 1 rises, the waste liquid passes through multiple packing plates 11 and generates a micro-electrolysis reaction with the iron-carbon particles. Since the waste liquid itself has a high acidity, iron is corroded to produce ferrous ions. The high-potential metal is used to displace the low-potential metal, that is, the iron filings are used to remove the pollutants in the waste liquid with a potential lower than that of ferrous ions, so that some pollutants in the waste liquid are flocculated and precipitated at the bottom of the reaction tank 1. At the same time, the iron-carbon particles adsorb some pollutants on the surface. The ferrous ions generated by micro-electrolysis enter the reaction tower 2 with the preliminarily treated waste liquid through the first conveying assembly 4, and the precipitate is discharged through the sludge discharge pipe 16.

[0048] Refer to Figure 1 and Figure 4 , the first conveying assembly 4 includes a first water outlet pipe 41 and a first conveying pump 42. The first water outlet pipe 41 is arranged on the reaction tank 1 and communicates with the inside of the reaction tank 1. The first water outlet pipe 41 is located above the packing plate 11. The suction end of the first conveying pump 42 is connected to the first water outlet pipe 41, and the conveying end of the first conveying pump 42 is connected to the reaction tower 2 through a first conveying pipe 421. The first conveying pipe 421 extends into the reaction tower 2, and a flow meter 422 is provided on the first conveying pipe 421.

[0049] Refer to Figure 1 and Figure 5 , a medicine delivery pipe 211 extending into the reaction tower 2 is provided on the medicine box 21. In this embodiment, the medicine box 21 is filled with liquid hydrogen peroxide. A metering chemical dosing pump 212 is provided on the medicine delivery pipe 211. A stirrer 22 for mixing the waste liquid and the medicine liquid in the reaction tower 2 is provided on the reaction tower 2, and a timer 23 is also provided on the reaction tower 2; in other embodiments, other chemical agents can be installed in the medicine box 21.

[0050] Refer to Figure 1 and Figure 5 , the stirrer 22 includes a stirring paddle 221 and a motor 222. A stirring shaft 24 is rotatably arranged coaxially in the reaction tower 2. There are two stirring paddles 221. Both of the two stirring paddles 221 are spiral and are fixedly arranged on the stirring shaft 24 at intervals coaxially. The motor 222 is fixedly arranged on the reaction tower 2 and the output end is in transmission connection with the stirring shaft 24 and is used to drive the stirring paddle 221 to rotate.

[0051] Refer to Figure 1 and Figure 5, the waste liquid after preliminary treatment enters the reaction tower 2. Hydrogen peroxide has the ability to oxidize various organic substances under the catalytic action of ferrous ions. The waste liquid contains ferrous ions and ferric ions. Ferric ions can not only generate ferric hydroxide precipitation with hydroxide ions, but also react with pollutants to form complex compounds, causing the pollutants to precipitate. The waste liquid after micro-electrolysis provides ferrous ions for the subsequent reaction, and cooperates with hydrogen peroxide to oxidize the pollutants. The amount of waste liquid added to the reaction tower 2 is known through the flow meter 422, and the content of hydrogen peroxide added is controlled by the dosing pump 212. After dosing, the stirrer 22 is started to make hydrogen peroxide fully mix with the waste liquid and react. The stirred waste liquid mixture enters the sedimentation tank 3 through the second conveying component 5.

[0052] Refer to Figure 1 , the second conveying component 5 includes a second water outlet pipe 51 and a second conveying pump 52. The bottom end of the reaction tower 2 has a liquid outlet pipe 25, and a liquid outlet valve for controlling opening and closing is provided on the liquid outlet pipe 25. The second water outlet pipe 51 is communicated with the liquid outlet pipe 25. The suction end of the second conveying pump 52 is connected to the second water outlet pipe 51. A second conveying pipe 521 is provided at the conveying end of the second conveying pump 52, and the second conveying pipe 521 extends into the sedimentation tank 3. The suction end of the sludge discharge pump 31 is communicated with the inside of the sedimentation tank 3 through a sludge suction pipe 32. A drain pipe 33 is erected on the sedimentation tank 3, and one end of the drain pipe 33 away from the sedimentation tank 3 is connected to a water suction pump 34.

[0053] Refer to Figure 1 , the stirred waste liquid enters the sedimentation tank 3, the pollutants precipitate to the bottom of the sedimentation tank 3, and the supernatant is reserved for subsequent use. According to the requirements of recycling or discharging, existing treatment means such as ultraviolet treatment can also be selected to be added after the sedimentation tank 3, which will not be elaborated in this application.

[0054] By first filtering the fracturing acidification waste liquid to remove large particle impurities and suspended matters, then using the acidic environment for micro-electrolysis reaction to destroy the stability of the waste liquid, reduce the viscosity and chromaticity of the waste liquid, and reduce the COD level in the waste liquid, and then using the ferrous ions generated by micro-electrolysis to cooperate with hydrogen peroxide oxidation to treat the waste liquid, not only reduces the dosage of the medicine, saves costs, but also improves the treatment effect of the medicine on the waste liquid, thus improving the treatment efficiency of the fracturing acidification waste liquid.

[0055] The working principle of the embodiment of this application is:

[0056] First, the fracturing acidification waste liquid is filtered to remove large particulate impurities and suspended solids. Then, in reaction tank 1, a microelectrolysis reaction is carried out in an acidic environment to destroy the stability of the waste liquid, reduce the viscosity and chromaticity of the waste liquid, and lower the COD level in the waste liquid. The waste liquid after the microelectrolysis reaction enters reaction tower 2 through the first water outlet pipe 41 and the first conveying pipe 421. According to the flowmeter 422, the amount of waste liquid to be treated is obtained. Then, a suitable amount of hydrogen peroxide is added to reaction tower 2 in cooperation with the dosing pump 212. In reaction tower 2, the ferrous ions generated by microelectrolysis and hydrogen peroxide oxidation are used to treat the waste liquid together, which not only reduces the dosage of the reagent, saves costs, but also improves the treatment effect of the drug on the waste liquid. Therefore, the treatment efficiency of the fracturing acidification waste liquid is improved.

[0057] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A fracturing acidification waste liquid treatment device, characterized in that: The invention comprises a reaction tank (1), a reaction tower (2) and a sedimentation tank (3) which are arranged in sequence, wherein the reaction tank (1) is provided with iron-carbon particles, the reaction tower (2) is connected to the reaction tank (1) via a first conveying assembly (4), a medicine box (21) for adding medicine into the reaction tower (2) is provided on the reaction tower (2), the sedimentation tank (3) is connected to the reaction tower (2) via a second conveying assembly (5), and a mud discharge pump (31) is provided on the sedimentation tank (3).

2. A fracturing acidification waste liquid treatment device according to claim 1, characterized in that: A plurality of filler plates (11) are arranged in sequence from bottom to top in the reaction tank (1), and iron-carbon particles are piled on the plurality of filler plates (11). A water inlet pipe (12) is coaxially fixed in the reaction tank (1), and the water inlet pipe (12) extends below the filler plates (11). A water distributor (14) is arranged at one end of the water inlet pipe (12) located in the reaction tank (1).

3. A fracturing acidification waste liquid treatment device according to claim 2, characterized in that: The first conveying assembly (4) comprises: A first water outlet pipe (41), the first water outlet pipe (41) being arranged on the reaction tank (1) and located above the filler plate (11); A first delivery pump (42), wherein the suction end of the first delivery pump (42) is connected to the first water outlet pipe (41), and the delivery end of the first delivery pump (42) is connected to the reaction tower (2) via a first delivery pipe (421).

4. A fracturing acidification waste liquid treatment device according to claim 3, characterized in that: The reaction tower (2) is provided with a stirrer (22), and the stirrer (22) is used to mix the waste liquid and the drug solution in the reaction tower (2).

5. A fracturing acidification waste liquid treatment device according to claim 4, characterized in that: The medicine box (21) contains hydrogen peroxide, the first delivery pipe (421) is provided with a flow meter (422), the medicine box (21) is provided with a drug delivery pipe (211) extending into the reaction tower (2), and the drug delivery pipe (211) is provided with a drug adding pump (212).

6. A fracturing acidification waste liquid treatment device according to claim 5, characterized in that: The stirrer (22) comprises a stirring paddle (221) and a motor (222); the stirring paddle (221) is rotatably disposed in the reaction tower (2) and is in a spiral shape; the motor (222) is disposed on the reaction tower (2) and is used to drive the stirring paddle (221) to rotate.

7. A fracturing acidification waste liquid treatment device according to claim 6, characterized in that: The second conveying assembly (5) comprises: A second water outlet pipe (51), the second water outlet pipe (51) being in communication with the reaction tower (2); A second delivery pump (52), wherein the suction end of the second delivery pump (52) is connected to the second water outlet pipe (51), and the delivery end of the second delivery pump (52) is provided with a second delivery pipe (521), and the second delivery pipe (521) extends into the sedimentation tank (3).

8. The fracturing acidification waste liquid treatment device according to claim 2, characterized in that: It also comprises a pretreatment tank (6), wherein a filter element (61) is provided in the pretreatment tank (6), and the filter element (61) is used to filter suspended matter in the waste liquid, and the end of the water inlet pipe (12) away from the reaction tank (1) is connected to the pretreatment tank (6) via a water delivery pump (13).

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