Integrated test system and method for curing and repairing polluted bottom mud through vacuum electroosmosis

Abstract

The invention belongs to the technical field of geotechnical engineering sludge solidification, and particularly relates to an integrated test system and method for solidifying and repairing polluted bottom mud through vacuum electroosmosis. According to the method, the change of the water content and the electric conductivity of the polluted bottom mud in the electroosmosis treatment process can be monitored in real time, and the change of the pollution concentration of the polluted bottom mud can be calculated in real time according to the change of the water content and the electric conductivity, so that the problems that a traditional test method needs sampling detection, steps are tedious and a result cannot be obtained in real time are solved; no special equipment is needed for measuring the concentration and the moisture content of the pollutants, so that the cost is saved; pollutants in the polluted bottom mud are discharged into the water collecting assembly along with sewage, so that the decontamination effect is ensured; the polluted bottom mud in the mud inlet assembly is sucked into the vacuum container through the negative pressure assembly, so that the uniformity of the polluted bottom mud is ensured; along with the proceeding of the test, the vacuum container compresses the polluted bottom mud, so that the vacuum electroosmosis dehydration and decontamination process is accelerated.

Description

Technical Field

[0001] The invention belongs to the technical field of geotechnical engineering sludge solidification, and in particular relates to an integrated test system and method for vacuum electroosmosis solidification and restoration of polluted sediment. Background Art

[0002] The consolidation and remediation of contaminated sediments is one of the major challenges in the field of environmental protection, especially sediments containing high concentrations of heavy metal pollutants. Vacuum electroosmosis is a technology that can simultaneously achieve consolidation and remediation of contaminated sediments. Through electric field and vacuum negative pressure, it can remove water from the sediment while maintaining the stability of the sediment structure. The electric field can also drive the migration of heavy metal ions, thereby remediating the contaminated sediment.

[0003] Through physical model experiments, the mechanism of vacuum electroosmosis technology in consolidating and repairing contaminated sediments is explored, which is conducive to the promotion and wide application of vacuum electroosmosis technology in engineering practice of contaminated sediments. However, the vacuum electroosmosis test method in the existing technology has many defects, such as: focusing solely on the consolidation and dehydration of sediments by vacuum electroosmosis without considering decontamination; relying on sampling to detect pollutant concentration and moisture content, the process is cumbersome and inconvenient; laboratory measurement of pollutant concentration and moisture content requires special equipment, which is costly and cannot reflect the decontamination effect in real time, resulting in difficulty in accurately controlling the repair process.

[0004] Therefore, an integrated test system and method for vacuum electroosmosis solidification and remediation of contaminated sediment is urgently needed. Summary of the invention

[0005] The purpose of the present invention is to provide an integrated test system and method for vacuum electroosmosis solidification and restoration of contaminated sediment to solve the above problems.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] An integrated test system for vacuum electroosmosis solidification and remediation of polluted sediments, comprising:

[0008] Vacuum container for holding polluted sludge;

[0009] An electroosmosis component is inserted into the vacuum container, and the electroosmosis component is buried in the contaminated sediment;

[0010] A monitoring component is inserted into the vacuum container, and the monitoring component is buried in the contaminated sediment;

[0011] A negative pressure component is connected to one side of the vacuum container, and the connection point between the negative pressure component and the vacuum container is located at the upper part of the vacuum container;

[0012] A water collection component is connected between the negative pressure component and the vacuum container, and an electronic scale is arranged below the water collection component;

[0013] The mud inlet assembly is connected to the side of the vacuum container away from the negative pressure assembly. The connection point between the mud inlet assembly and the vacuum container is located at the upper part of the vacuum container. The contaminated bottom mud is placed in the mud inlet assembly.

[0014] Preferably, the vacuum container comprises:

[0015] A model box container, wherein a sealing cover is detachably connected to the top opening of the model box container, and a left circular opening and a right circular opening are respectively opened on two opposite side walls of the model box container, and the left circular opening and the right circular opening are both located at the upper part of the model box container;

[0016] A transparent vacuum membrane is arranged in the model box container, and a left sleeve and a right sleeve are respectively connected to the opposite side walls of the transparent vacuum membrane, and the left sleeve and the right sleeve are both located at the upper part of the transparent vacuum membrane. The left sleeve passes through the left circular opening and is connected to the negative pressure component. A geotextile is arranged in the left sleeve, and the right sleeve passes through the right circular opening and is connected to the mud inlet component. A left hole and a right hole are opened at the top of the transparent vacuum membrane.

[0017] Preferably, the electroosmotic component comprises:

[0018] A first EKG drain plate is inserted into the left hole, and the first EKG drain plate is vertically buried in the contaminated bottom mud;

[0019] A second EKG drain plate is inserted into the right hole, and the second EKG drain plate is vertically buried in the contaminated bottom mud;

[0020] A DC power supply, two poles of which are electrically connected to the first EKG drain board and the second EKG drain board through wires.

[0021] Preferably, the monitoring component comprises:

[0022] A soil moisture sensor, buried in the contaminated sediment;

[0023] A conductivity sensor, buried in the contaminated sediment;

[0024] The reader is electrically connected to the soil moisture sensor and the conductivity sensor through the other wires.

[0025] Preferably, the water collection assembly comprises:

[0026] A water collecting bottle has a left circular outlet and a right circular inlet at the top. The water collecting bottle is placed above the electronic scale, and the right circular inlet is connected to the left sleeve through a sewage pipe.

[0027] Preferably, the negative pressure component comprises:

[0028] A vacuum pump is connected to the left circular outlet through a vacuum pipeline.

[0029] Preferably, the mud inlet assembly comprises:

[0030] A sludge storage tank, wherein the polluted sludge is placed in the sludge storage tank;

[0031] A mud inlet pipe, one end of which is connected to the right sleeve and the other end of which extends into the contaminated bottom mud in the mud storage tank;

[0032] The mud inlet valve is arranged on the mud inlet pipeline.

[0033] An integrated test method for vacuum electroosmosis solidification and restoration of contaminated sediment, based on the integrated test system for vacuum electroosmosis solidification and restoration of contaminated sediment, the test steps are as follows:

[0034] Start the negative pressure component to make the vacuum container in a negative pressure state, and suck the contaminated sludge in the sludge inlet component into the vacuum container. When the top surface of the contaminated sludge reaches the set position, the negative pressure component stops, and the electroosmosis component and the monitoring component are buried in the contaminated sludge. The sludge inlet component is cut off, and the negative pressure component, the electroosmosis component and the monitoring component are started. The data change curves of the water content and conductivity of the contaminated sludge are recorded, and the quality changes of the sewage in the water collection component are recorded. After reaching the set value, the test is stopped, and the pollution concentration change curve of the contaminated sludge is calculated based on the data change curves of the water content and conductivity of the contaminated sludge.

[0035] Preferably, the calculation formula for the pollution concentration change curve of the polluted sediment is:

[0036] C = aσ + bω + c(S);

[0037] Where, σ is the conductivity of the polluted sediment, in S / m;

[0038] w is the water content of the polluted sediment;

[0039] a, b, c are related parameters, and the determination steps are:

[0040] Take three equal amounts of the contaminated sludge to be treated in the sludge inlet assembly and put them into three beakers respectively; add pollutants of different concentrations into two of the beakers, and measure the pollution concentration, conductivity and water content of the contaminated sludge in the three beakers respectively, substitute the measured data into formula (S) to determine the values ​​of a, b, and c.

[0041] Compared with the prior art, the present invention has the following advantages and technical effects:

[0042] In the present invention, by burying a monitoring component in the contaminated sludge, the changes in the water content and conductivity of the contaminated sludge during the electroosmosis treatment process can be monitored in real time, and the changes in the pollution concentration of the contaminated sludge can be calculated in real time according to the changes in the water content and conductivity, thereby solving the problem that the traditional test method requires sampling and testing, the steps are cumbersome and the results cannot be obtained in real time, and no special equipment is required to measure the pollutant concentration and water content, saving costs; the pollutants in the contaminated sludge are discharged into the water collection component along with the sewage, ensuring the decontamination effect; the contaminated sludge in the mud inlet component is sucked into the vacuum container through the negative pressure component, reducing the contact between the contaminated sludge and other equipment, avoiding the contamination of other pollutants in the contaminated sludge, affecting the accuracy of the test, and ensuring the uniformity of the contaminated sludge; as the test proceeds, the vacuum container compresses the contaminated sludge, accelerating the vacuum electroosmosis dehydration and decontamination process. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0044] Figure 1 It is a schematic diagram of the test system of the present invention;

[0045] Figure 2 It is a structural schematic diagram of the model box container in the present invention;

[0046] Figure 3 It is a schematic diagram of the structure of the transparent vacuum film in the present invention;

[0047] Figure 4 is the moisture content variation curve of the polluted sludge in the present invention;

[0048] Figure 5 is the conductivity change curve of the polluted sludge in the present invention;

[0049] Figure 6 is the pollution concentration variation curve of the polluted sediment in the present invention;

[0050] Among them, 1. model box container; 2. sealing cover; 3. circular opening on the left; 4. circular opening on the right; 5. geotextile; 6. small hole; 7. mud inlet pipe; 8. mud inlet valve; 9. polluted sludge; 10. sludge storage tank; 11. vacuum pump; 12. water collection bottle; 13. sewage pipe; 14. transparent vacuum membrane; 15. circular outlet on the left; 16. circular inlet on the right; 17. vacuum pipe; 18. left sleeve; 19. right sleeve; 20. left hole; 21. right hole; 22. self-locking cable tie; 23. first EKG drain board; 24. second EKG drain board; 25. wire; 26. DC power supply; 27. soil moisture sensor; 28. conductivity sensor; 29. ​​electronic scale; 30. reading instrument. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] Reference Figures 1 to 3 The present invention discloses an integrated test system for vacuum electroosmosis solidification and restoration of polluted sediment, comprising:

[0054] A vacuum container for holding contaminated sludge 9;

[0055] The electroosmosis component is inserted into the vacuum container and buried in the contaminated sediment 9;

[0056] The monitoring component is inserted into the vacuum container and buried in the contaminated sediment 9;

[0057] A negative pressure component is connected to one side of the vacuum container, and the connection point between the negative pressure component and the vacuum container is located at the upper part of the vacuum container;

[0058] A water collection component is connected between the negative pressure component and the vacuum container, and an electronic scale 29 is arranged below the water collection component;

[0059] The mud inlet assembly is communicated with a side of the vacuum container away from the negative pressure assembly. The connection point between the mud inlet assembly and the vacuum container is located at the upper part of the vacuum container. The contaminated bottom mud 9 is placed in the mud inlet assembly.

[0060] Further optimization scheme, the vacuum container includes:

[0061] A model box container 1, a sealing cover 2 is detachably connected to the top opening of the model box container 1, and a left circular opening 3 and a right circular opening 4 are respectively opened on the opposite side walls of the model box container 1, and the left circular opening 3 and the right circular opening 4 are both located at the upper part of the model box container 1;

[0062] A transparent vacuum membrane 14 is arranged in the model box container 1. The opposite side walls of the transparent vacuum membrane 14 are respectively connected with a left sleeve 18 and a right sleeve 19. The left sleeve 18 and the right sleeve 19 are both located at the upper part of the transparent vacuum membrane 14. The left sleeve 18 passes through the left circular opening 3 and is connected with the negative pressure component. A geotextile 5 is arranged in the left sleeve 18. The right sleeve 19 passes through the right circular opening 4 and is connected with the mud inlet component. A left hole 20 and a right hole 21 are opened at the top of the transparent vacuum membrane 14.

[0063] One end of the left sleeve 18 is inserted into the left circular opening 3, and then the left sleeve 18 and the left circular opening 3 are fastened by a self-locking cable tie 22 to ensure the firmness and sealing of the connection; one end of the right sleeve 19 is inserted into the right circular opening 4, and then the right sleeve 19 and the right circular opening 4 are fastened by a self-locking cable tie 22 to ensure the firmness and sealing of the connection.

[0064] To further optimize the solution, the electroosmotic components include:

[0065] A first EKG drain plate 23 is inserted into the left hole 20 and is vertically buried in the contaminated sludge 9;

[0066] The second EKG drain plate 24 is inserted into the right hole 21 and is vertically buried in the contaminated sludge 9;

[0067] The two poles of the DC power supply 26 are electrically connected to the first EKG drain board 23 and the second EKG drain board 24 through the wires 25 respectively.

[0068] To further optimize the solution, the monitoring components include:

[0069] A soil moisture sensor 27 is buried in the contaminated sediment 9;

[0070] The conductivity sensor 28 is buried in the polluted sludge 9;

[0071] The reader 30 is electrically connected to the soil moisture sensor 27 and the conductivity sensor 28 through another wire 25 .

[0072] To further optimize the solution, the water collection components include:

[0073] The water collecting bottle 12 has a left circular outlet 15 and a right circular inlet 16 at the top. The water collecting bottle 12 is placed above the electronic scale 29 , and the right circular inlet 16 is connected to the left sleeve 18 through the sewage pipe 13 .

[0074] To further optimize the solution, the negative pressure components include:

[0075] The vacuum pump 11 is connected to the left circular outlet 15 through a vacuum pipe 17 .

[0076] To further optimize the solution, the mud inlet components include:

[0077] A sludge storage tank 10, in which the polluted sludge 9 is placed;

[0078] The mud inlet pipe 7 has one end connected to the right sleeve 19 and the other end extending into the polluted bottom mud 9 in the mud storage tank 10;

[0079] The mud inlet valve 8 is arranged on the mud inlet pipeline 7 .

[0080] One end of the left sleeve 18 away from the transparent vacuum membrane 14 passes through the left circular opening 3 and is connected to the sewage pipe 13, and one end of the right sleeve 19 away from the transparent vacuum membrane 14 passes through the right circular opening 4 and is connected to the mud inlet pipe 7;

[0081] An integrated test method for vacuum electroosmosis solidification and restoration of contaminated sediment, based on an integrated test system for vacuum electroosmosis solidification and restoration of contaminated sediment, the test steps are as follows:

[0082] Start the negative pressure component to make the vacuum container in a negative pressure state, and suck the contaminated sludge 9 in the sludge inlet component into the vacuum container. When the top surface of the contaminated sludge 9 reaches the set position, the negative pressure component stops, and the electroosmosis component and the monitoring component are buried in the contaminated sludge 9. The sludge inlet component is cut off, and the negative pressure component, the electroosmosis component and the monitoring component are started. The data change curves of the water content and conductivity of the contaminated sludge 9 are recorded, and the quality changes of the sewage in the water collection component are recorded. After reaching the set value, the test is stopped, and the pollution concentration change curve of the contaminated sludge 9 is calculated based on the data change curves of the water content and conductivity of the contaminated sludge 9.

[0083] Further optimizing the scheme, the calculation formula of the pollution concentration change curve of the polluted sediment 9 is:

[0084] C = aσ + bω + c(S);

[0085] Wherein, σ is the electrical conductivity of the polluted sediment 9, in S / m;

[0086] w is the water content of the polluted sludge 9;

[0087] a, b, c are related parameters, and the determination steps are:

[0088] Take three equal portions of the contaminated sludge 9 to be treated in the sludge feed assembly and put them into three beakers respectively; add pollutants of different concentrations into two of the beakers, and measure the pollution concentration, conductivity and water content of the contaminated sludge 9 in the three beakers respectively, substitute the measured data into formula (S) to determine the values ​​of a, b and c.

[0089] One specific example:

[0090] The polluted sludge 9 taken from a river in Nanjing was placed in a sludge storage tank 10. It was measured that the water content of the polluted sludge 9 was 75%. The pollutants in the polluted sludge 9 were copper ions, and the initial concentration of copper ions was 1230 mg / kg.

[0091] Put the transparent vacuum film 14 into the model box container 1, the left sleeve 18 passes through the left circular opening 3 and then penetrates into the transparent vacuum film 14, the right sleeve 19 passes through the right circular opening 4 and then penetrates into the transparent vacuum film 14, and the connection between the transparent vacuum film 14 and the left sleeve 18 and the right sleeve 19 is tightened by the self-locking cable tie 22 to ensure the firmness and sealing of the connection. The height of the left sleeve 18 and the right sleeve 19 are the same, and then one end of the mud inlet pipe 7 is connected to the end of the right sleeve 19 located outside the model box container 1 (the connection method includes but is not limited to flange connection and threaded connection), and the other end of the mud inlet pipe 7 extends into the contaminated bottom mud 9 in the mud storage tank 10, and the mud inlet pipe A mud inlet valve 8 is provided on the channel 7 to control the flow rate of the polluted bottom mud 9; one end of the sewage pipe 13 is connected to one end of the left sleeve 18 located outside the model box container 1 (the connection method includes but is not limited to flange connection and threaded connection), a geotextile 5 is provided in the left sleeve 18, and the geotextile 5 prevents the bottom mud from blocking the sewage pipe 13, ensuring that the sewage is smoothly discharged to the water collection bottle 12, the other end of the sewage pipe 13 is connected to the right circular inlet 16 of the water collection bottle 12, the left circular outlet 15 of the water collection bottle 12 is connected to one end of the vacuum pipe 17, and the other end of the vacuum pipe 17 is connected to the vacuum pump 11, and an electronic scale 29 is provided below the water collection bottle 12;

[0092] The sealing cover 2 is fixedly connected to the top opening of the model box container 1, and the multiple small holes 6 on the sealing cover 2 are blocked by the wire 25. The mud inlet valve 8 is opened, and the vacuum pump 11 is started to gradually increase the negative pressure. The final vacuum negative pressure is controlled at -80 kPa, so that the flowing contaminated sludge 9 flows into the transparent vacuum membrane 14 through the mud inlet pipe 7. The mud inlet speed and mud filling condition of the contaminated sludge 9 are observed to ensure uniform filling. When the top surface of the contaminated sludge 9 is close to the lower end of the left sleeve 18 / right sleeve 19, the vacuum pump 11 stops working;

[0093] Open the sealing cover 2, insert the soil moisture sensor 27 and the conductivity sensor 28 into the contaminated bottom mud 9 in the transparent vacuum membrane 14 through the left hole 20 and the right hole 21 respectively, and connect the wires 25 of the soil moisture sensor 27 and the conductivity sensor 28 to the reading instrument 30 after passing through the small hole 6 on the sealing cover 2; insert the first EKG drain board 23 and the second EKG drain board 24 into the contaminated bottom mud 9 in the transparent vacuum membrane 14 through the left hole 20 and the right hole 21 respectively, and connect the wire 25 of the first EKG drain board 23 to the cathode of the DC power supply 26 after passing through the small hole 6, and connect the wire 25 of the second EKG drain board 24 to the anode of the DC power supply 26 after passing through the small hole 6, and cover the sealing cover 2;

[0094] Close the mud inlet valve 8, start the vacuum pump 11 and the DC power supply 26, control the vacuum negative pressure at -80kPa, and set the potential gradient to 1V / cm. Under the action of the vacuum negative pressure and the electric field, the water and heavy metal contamination ions in the polluted sludge in the transparent vacuum membrane 14 migrate from the second EKG drainage board 24 to the first EKG drainage board 23. At the same time, the transparent vacuum membrane 14 further compresses the polluted sludge to accelerate the vacuum electroosmosis dehydration and decontamination process. During this process, the voltage, current, vacuum pressure and water output are regularly checked to ensure the stability and effect of the treatment process. At the same time, the water content and conductivity changes in the polluted sludge are recorded by the reader 30. The sewage containing copper ions enters the water collection bottle 12 through the sewage pipe 13, and the geotextile 5 prevents the sludge from clogging the sewage. The water pipe 13 ensures that the sewage is discharged smoothly to the water collection bottle 12. The mass of the sewage in the water collection bottle 12 is recorded by the electronic scale 29. When the hourly increase of the sewage in the water collection bottle 12 is less than 5% of the existing sewage volume, it is considered that the treatment process is basically completed, the vacuum pump 11 and the DC power supply 26 are turned off, the sealing cover 2 is opened, the first EKG drainage board 23, the second EKG drainage board 24, the soil moisture sensor 27 and the conductivity sensor 28 are taken out, the self-locking cable tie 22 is removed, and the gap at the connection between the transparent vacuum film 14 and the left sleeve 18 and the right sleeve 19 is tightened to prevent the contaminated bottom mud 9 from overflowing. The transparent vacuum film 14 that is tightened and filled with mud samples is taken out from the model box container 1 and moved to the stacking area or the transport vehicle for subsequent transfer or resource utilization;

[0095] The measured water content change curve of the polluted sludge 9 is as follows: Figure 4 As shown, the conductivity change curve of the polluted sludge 9 is as follows Figure 5 As shown;

[0096] Three equal amounts of the untreated contaminated sludge 9 in the sludge storage tank 10 were taken out and placed in three beakers respectively. The beakers were labeled D, E, and F. Equal amounts of copper nitrate of different concentrations were respectively introduced into beaker D and beaker E. A soil moisture sensor 27 and a conductivity sensor 28 were placed in each beaker. It was measured that the water content w of the contaminated sludge 9 in beaker D was 75%, and the conductivity σ was 828 mg / kg. The water content w of the contaminated sludge 9 in beaker E was 75%, and the conductivity σ was 1092 mg / kg. The water content w of the contaminated sludge sample in beaker F was 75%, and the conductivity σ was 1245 mg / kg. The three groups of data were substituted into formula (S) to obtain a=0.98, b=24.60, and c=433.57. A, b, and c were substituted into formula (S) to calculate the pollutant concentration change curve of the contaminated sludge 9 during the vacuum electroosmosis test.

[0097] The pollutant concentration change curve of the polluted sediment 9 is measured as follows: Figure 6 shown.

[0098] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0099] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An integrated test system for vacuum electroosmosis solidification and restoration of polluted sediment, characterized in that: include: A vacuum container for containing contaminated sludge (9); An electroosmotic component is inserted into the vacuum container, and the electroosmotic component is buried in the contaminated sediment (9); A monitoring component is inserted into the vacuum container, and the monitoring component is buried in the contaminated sediment (9); A negative pressure component is connected to one side of the vacuum container, and the connection point between the negative pressure component and the vacuum container is located at the upper part of the vacuum container; A water collection component is connected between the negative pressure component and the vacuum container, and an electronic scale (29) is arranged below the water collection component; The mud inlet assembly is connected to the side of the vacuum container away from the negative pressure assembly. The connection point between the mud inlet assembly and the vacuum container is located at the upper part of the vacuum container. The contaminated bottom mud (9) is placed in the mud inlet assembly.

2. The vacuum electroosmosis solidification and restoration of polluted sediment integrated test system according to claim 1 is characterized in that: The vacuum container comprises: A model box container (1), wherein a sealing cover (2) is detachably connected to the top opening of the model box container (1), and a left circular opening (3) and a right circular opening (4) are respectively provided on two opposite side walls of the model box container (1), and the left circular opening (3) and the right circular opening (4) are both located at the upper part of the model box container (1); A transparent vacuum membrane (14) is arranged in the model box container (1). The two opposite side walls of the transparent vacuum membrane (14) are respectively connected with a left sleeve (18) and a right sleeve (19). The left sleeve (18) and the right sleeve (19) are both located at the upper part of the transparent vacuum membrane (14). The left sleeve (18) passes through the left circular opening (3) and is connected to the negative pressure component. A geotextile (5) is arranged in the left sleeve (18). The right sleeve (19) passes through the right circular opening (4) and is connected to the mud inlet component. A left hole (20) and a right hole (21) are opened at the top of the transparent vacuum membrane (14).

3. The vacuum electroosmosis solidification and restoration of polluted sediment integrated test system according to claim 2 is characterized in that: The electroosmotic assembly comprises: A first EKG drainage plate (23) is inserted into the left hole (20), and the first EKG drainage plate (23) is vertically buried in the contaminated sludge (9); A second EKG drainage plate (24) is inserted into the right hole (21), and the second EKG drainage plate (24) is vertically buried in the contaminated sludge (9); A direct current power source (26), two poles of which are electrically connected to the first EKG drain board (23) and the second EKG drain board (24) through wires (25).

4. The vacuum electroosmosis solidification and restoration of polluted sediment integrated test system according to claim 3 is characterized in that: The monitoring components include: A soil moisture sensor (27) buried in the contaminated sediment (9); A conductivity sensor (28) buried in the contaminated sediment (9); The reading instrument (30) is electrically connected to the soil moisture sensor (27) and the conductivity sensor (28) through another conductive wire (25).

5. The vacuum electroosmosis solidification and restoration of polluted sediment integrated test system according to claim 2 is characterized in that: The water collection assembly comprises: The water collecting bottle (12) has a left circular outlet (15) and a right circular inlet (16) at the top. The water collecting bottle (12) is placed above the electronic scale (29). The right circular inlet (16) is connected to the left sleeve (18) through a sewage pipe (13).

6. The vacuum electroosmosis solidification and restoration of polluted sediment integrated test system according to claim 5 is characterized in that: The negative pressure component comprises: A vacuum pump (11), wherein the vacuum pump (11) is connected to the left circular outlet (15) through a vacuum pipe (17).

7. The vacuum electroosmosis solidification and restoration of polluted sediment integrated test system according to claim 2 is characterized in that: The mud inlet assembly comprises: A sludge storage tank (10), wherein the polluted sludge (9) is placed in the sludge storage tank (10); A mud inlet pipe (7), one end of which is in communication with the right sleeve (19) and the other end of which extends into the contaminated bottom mud (9) in the mud storage tank (10); The mud inlet valve (8) is arranged on the mud inlet pipeline (7).

8. A vacuum electroosmosis solidification and restoration of polluted sediment integrated test method, based on the vacuum electroosmosis solidification and restoration of polluted sediment integrated test system according to any one of claims 1 to 7, characterized in that: The test steps are as follows: The negative pressure component is started to make the vacuum container in a negative pressure state, and the contaminated sludge (9) in the sludge inlet component is sucked into the vacuum container. When the top surface of the contaminated sludge (9) reaches a set position, the negative pressure component is stopped, and the electroosmosis component and the monitoring component are buried in the contaminated sludge (9), the sludge inlet component is cut off, and the negative pressure component, the electroosmosis component and the monitoring component are started. The data change curve of the water content and conductivity of the contaminated sludge (9) is recorded, and the quality change of the sewage in the water collection component is recorded. After reaching the set value, the test is stopped, and the pollution concentration change curve of the contaminated sludge (9) is calculated based on the data change curve of the water content and conductivity of the contaminated sludge (9).

9. The vacuum electroosmosis solidification and restoration of polluted sediment integrated test method according to claim 8, characterized in that: The calculation formula of the pollution concentration change curve of polluted sediment (9) is: C = aσ + bω + c(S); Where, σ is the electrical conductivity of the polluted sediment (9), in S / m; w is the water content of the contaminated sludge (9); a, b, c are related parameters, and the determination steps are: Take three equal portions of the contaminated sludge (9) to be treated in the sludge inlet assembly and put them into three beakers respectively; add pollutants of different concentrations into two of the beakers, and measure the pollution concentration, conductivity and water content of the contaminated sludge (9) in the three beakers respectively, substitute the measured data into formula (S) to determine the values ​​of a, b and c.

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