A system and method for evaluating the restoration effect of heavy metal-contaminated soil residue

Abstract

The present invention belongs to the technical field of heavy metal contaminated mud residue, and specifically provides a system and method for evaluating the restoration effect of heavy metal contaminated mud residue, including an acid quantitative supply module, a carbon dioxide quantitative supply module, a hot air quantitative supply module, a cold air quantitative supply module, a contaminated mud residue storage module, a liquid collection detection module and a control module. The acid quantitative supply module is used to complete two evaluation methods, namely, rainfall erosion and acid erosion. The carbon dioxide quantitative supply module, the hot air quantitative supply module and the cold air quantitative supply module are used to complete five evaluation methods, namely, carbonization erosion, high temperature erosion, low temperature erosion, dry and wet erosion and freeze-thaw erosion. The contaminated mud residue storage module, the liquid collection detection module and the control module realize the refined control of the entire process of heavy metal contaminated mud residue restoration effect and long-term stability evaluation. The solution is simple, easy to operate, low cost, and can be applied in large-scale engineering.

Description

Technical Field

[0001] The invention belongs to the technical field of heavy metal polluted soil slag restoration, and in particular relates to a heavy metal polluted soil slag restoration effect evaluation system and method. Background Art

[0002] The safe restoration and secondary utilization of soil residues contaminated with composite heavy metals is a major environmental problem that needs to be solved urgently in my country, and it is also a major strategic need for promoting the construction of ecological civilization in my country. This type of contaminated soil residue has the characteristics of many types of pollutants, high concentrations and complex properties, and has become a major environmental problem that needs to be solved urgently in my country. Solidification / stabilization technology is the most widely used restoration technology for heavy metal contaminated soil residues at home and abroad, but solidification / stabilization restoration technology only changes the occurrence form of heavy metal pollutants, and does not change the total amount of heavy metals in the soil residue. In fact, the contaminated soil residues after solidification / stabilization are often eroded by complex external environments (such as acid, freeze-thaw, dry-wet and carbonization). Studies by scholars at home and abroad have shown that complex external environments will deteriorate the engineering properties of the contaminated soil residues after solidification / stabilization, reduce their hydraulic properties, and increase the risk of heavy metal re-dissolution. Therefore. How to scientifically and quantitatively evaluate the restoration effect and long-term stability of heavy metal contaminated soil residues is the key to determining whether heavy metal contaminated soil residues are safely restored and reused.

[0003] At present, the evaluation of the remediation effect and long-term stability of heavy metal contaminated mud residue under complex external environment at home and abroad is only in the laboratory research stage, and most of them are single-factor evaluation systems, which cannot achieve accurate evaluation of the remediation effect and long-term stability of heavy metal contaminated mud residue under multiple factors. In addition, the existing evaluation facilities are not only difficult to operate and costly, but also have too long test cycles, which cannot reflect the urgency of the long-term environmental risks of solidified bodies under natural conditions. Therefore, designing a system and method for evaluating the remediation effect of heavy metal contaminated mud residue under various natural conditions has extremely high engineering significance and practical value for the safe remediation and secondary utilization of heavy metal contaminated mud residue. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a system and method for evaluating the restoration effect of heavy metal-contaminated mud residue, which solves the problem of difficulty in evaluating mud residue pollution.

[0005] To this end, the present invention provides a heavy metal contaminated mud slag restoration effect evaluation system, including an acid quantitative supply module, a carbon dioxide quantitative supply module, a hot air quantitative supply module, a cold air quantitative supply module, a contaminated mud slag storage module, a liquid collection detection module and a control module;

[0006] The acid quantitative supply module is used to provide one or more acidic solution environments of simulated rainfall, simulated acid rain, simulated acetic acid, simulated gastric acid and simulated plant acid in a timely and quantitative manner;

[0007] The carbon dioxide quantitative supply module is used to provide a simulated carbonization erosion environment in a timely and quantitative manner;

[0008] The hot gas quantitative supply module is used to provide a simulated high temperature corrosion environment in a timely and quantitative manner; the hot gas quantitative supply module is used in conjunction with the acid liquid quantitative supply module to provide a dry and wet corrosion environment;

[0009] The cold air quantitative supply module is used to provide simulated low temperature erosion in a timely and quantitative manner; the hot air quantitative supply module is used in conjunction with the cold air quantitative supply module to provide a simulated freeze-thaw erosion environment;

[0010] The contaminated mud slag storage module is used to monitor the environmental variables of the mud slag storage bin, and to control the corresponding acid quantitative supply module, carbon dioxide quantitative supply module, hot gas quantitative supply module and cold gas quantitative supply module by timing and quantitative feedback;

[0011] The liquid collection detection module is used to collect and analyze soil residue after one or more processes of simulated rainfall, simulated acid solution environment, simulated carbonization erosion environment, simulated high temperature erosion environment, simulated low temperature erosion environment, simulated freeze-thaw erosion environment and simulated dry-wet erosion environment;

[0012] The control module is used to control the coordinated work of the acid quantitative supply module, the carbon dioxide quantitative supply module, the hot air quantitative supply module, the cold air quantitative supply module, the contaminated soil slag storage module and the liquid collection detection module.

[0013] Preferably, the acid quantitative supply module comprises a water tank, a first liquid pump, a first electromagnetic flow valve, an acid tank, a second liquid pump, a second electromagnetic flow valve, a regulating tank, a pH electrode, a stirrer, a third liquid pump and a third electromagnetic flow valve;

[0014] The acid quantitative supply module is used to calculate the required volumes of distilled water and acid agent according to the properties of the acid to be simulated, and evenly mix the acid agent and distilled water. The pH electrode constantly monitors the pH value of the acid solution in the adjustment tank and evenly sprays it in the soil slag storage bin through the nozzle.

[0015] Preferably, the carbon dioxide quantitative supply module includes a first vacuum pump, a first gas flowmeter, a carbon dioxide concentration sensor and a gas nozzle. The first vacuum pump extracts carbon dioxide from the carbon dioxide storage tank, the first gas flowmeter controls the extraction volume of carbon dioxide, the gas nozzle sprays carbon dioxide evenly into the soil slag storage bin, and the carbon dioxide concentration sensor monitors the carbon dioxide concentration in the soil slag storage bin in real time. When the carbon dioxide concentration in the soil slag storage bin reaches a predetermined value, the first vacuum pump and the first gas flowmeter are powered off and shut down; when the predetermined carbonization erosion time node is reached, the first vacuum pump, the first gas flowmeter, the carbon dioxide concentration sensor and the gas nozzle are powered off and shut down.

[0016] Preferably, the hot air quantitative supply module includes an air heater, a second air pump, a hot air tank, a third air pump, a second gas flow meter, a gas nozzle and a temperature sensor;

[0017] The air heater and the second vacuum pump are powered on and started respectively, the second vacuum pump draws the heated air into the hot air tank for storage, then the third vacuum pump and the second gas flow meter are powered on and started, the third vacuum pump draws the hot air out of the hot air tank, the second gas flow meter controls the extraction volume of the hot air, the gas nozzle sprays the hot air evenly into the soil slag storage bin, the temperature sensor monitors the temperature in the soil slag storage bin in real time, when the temperature in the soil slag storage bin reaches the preset high temperature value, the third vacuum pump and the second gas flow meter are powered off and shut down.

[0018] Preferably, the cold air quantitative supply module includes an air cooler, a fourth air pump, a cold air tank, a third gas flow meter, a temperature sensor and a gas nozzle;

[0019] The air cooler and the fourth vacuum pump are powered on and started respectively, the fourth vacuum pump draws the refrigerated air into the cold air tank for storage, then the fourth vacuum pump and the third gas flow meter are powered on and started, the fourth vacuum pump draws cold air from the cold air tank, the third gas flow meter controls the extracted volume of cold air, the gas nozzle sprays the cold air evenly into the soil slag storage bin, the temperature sensor monitors the temperature in the soil slag storage bin in real time, when the temperature in the soil slag storage bin reaches the preset low temperature value, the fourth vacuum pump and the third gas flow meter are powered off and shut down.

[0020] Preferably, the simulated dry and wet erosion environment of the contaminated mud slag storage module specifically includes:

[0021] The first liquid pump and the first electromagnetic flow valve are powered on and started, the first liquid pump pumps distilled water from the aqueous solution tank into the regulating tank, the first electromagnetic flow valve controls the volume of distilled water at all times, the third liquid pump and the third electromagnetic flow valve are powered on and started, the third liquid pump pumps distilled water from the regulating tank, the distilled water passes through the third electromagnetic flow valve, the third electromagnetic flow valve controls the flow of the distilled water, and the liquid nozzle sprays the distilled water evenly on the surface of the repair soil.

[0022] Preferably, the modules are connected inside and between each other via connecting pipes, and the connecting pipes are all corrosion-resistant hoses.

[0023] Preferably, the liquid collection detection module includes a liquid collection pipe, a fourth liquid pump, a filter, a liquid storage tank, a water quality multi-parameter sensor and a data collector;

[0024] The liquid collecting pipe and the fourth liquid pump are powered on and started. Under the pumping of the fourth liquid pump, the liquid in the mud residue enters the liquid storage tank through the liquid collecting pipe and the filter. The filter removes impurities in the liquid. The water quality multi-parameter sensor and the data collector are powered on and started. The water quality multi-parameter sensor conducts a comprehensive test on the liquid in the liquid storage tank and completes the test of four parameters: pH, conductivity, redox potential, and heavy metal concentration. The test parameters are transmitted to the control computer through the data collector for storage.

[0025] The present invention also provides a method for evaluating the effect of remediation of heavy metal-contaminated mud residues, and the evaluation method is applied to the system for evaluating the effect of remediation of heavy metal-contaminated mud residues as described in any of the preceding items.

[0026] Beneficial effects of the present invention: The system and method for evaluating the restoration effect of heavy metal contaminated soil slag provided by the present invention include an acid quantitative supply module, a carbon dioxide quantitative supply module, a hot gas quantitative supply module, a cold gas quantitative supply module, a contaminated soil slag storage module, a liquid collection detection module and a control module. The acid quantitative supply module is used to respectively complete the two evaluation methods of rainfall erosion and acid erosion. The carbon dioxide quantitative supply module, the hot gas quantitative supply module and the cold gas quantitative supply module are used to respectively complete the five evaluation methods of carbonization erosion, high temperature erosion, low temperature erosion, dry and wet erosion and freeze-thaw erosion. The contaminated soil slag storage module, the liquid collection detection module and the control module realize the refined control of the whole process of heavy metal contaminated soil slag restoration effect and long-term stability evaluation. The present invention has a simple structure, convenient operation and low cost. It can be applied in large-scale engineering to achieve scientific, comprehensive, efficient and rapid evaluation of the restoration effect and long-term stability of various heavy metal contaminated soil slag.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the heavy metal contaminated soil residue restoration effect evaluation system and method of the present invention. DETAILED DESCRIPTION

[0029] 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.

[0030] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0032] The embodiment of the present invention provides a system and method for evaluating the restoration effect of heavy metal contaminated soil residue. Figure 1 As shown, the heavy metal contaminated mud slag restoration effect evaluation system includes an acid quantitative supply module, a carbon dioxide quantitative supply module, a hot air quantitative supply module, a cold air quantitative supply module, a contaminated mud slag storage module, a liquid collection detection module and a control module;

[0033] The acid quantitative supply module is used to provide one or more acidic solution environments of simulated rainfall, simulated acid rain, simulated acetic acid, simulated gastric acid and simulated plant acid in a timely and quantitative manner;

[0034] The carbon dioxide quantitative supply module is used to provide a simulated carbonization erosion environment in a timely and quantitative manner;

[0035] The hot gas quantitative supply module is used to provide a simulated high temperature corrosion environment in a timely and quantitative manner; the hot gas quantitative supply module is used in conjunction with the acid liquid quantitative supply module to provide a dry and wet corrosion environment;

[0036] The cold air quantitative supply module is used to provide simulated low temperature erosion in a timely and quantitative manner; the hot air quantitative supply module is used in conjunction with the cold air quantitative supply module to provide a simulated freeze-thaw erosion environment;

[0037] The contaminated mud slag storage module is used to monitor the environmental variables of the mud slag storage bin, and to control the corresponding acid quantitative supply module, carbon dioxide quantitative supply module, hot gas quantitative supply module and cold gas quantitative supply module by timing and quantitative feedback;

[0038] The liquid collection detection module is used to collect and analyze soil residue after one or more processes of simulated rainfall, simulated acid solution environment, simulated carbonization erosion environment, simulated high temperature erosion environment, simulated low temperature erosion environment, simulated freeze-thaw erosion environment and simulated dry-wet erosion environment;

[0039] The control module is used to control the coordinated work of the acid quantitative supply module, the carbon dioxide quantitative supply module, the hot air quantitative supply module, the cold air quantitative supply module, the contaminated soil slag storage module and the liquid collection detection module.

[0040] The control module is used to control the coordinated work of the acid quantitative supply module, the carbon dioxide quantitative supply module, the hot air quantitative supply module, the cold air quantitative supply module, the contaminated soil slag storage module and the liquid collection detection module.

[0041] Among them, the heavy metal contaminated soil slag restoration effect evaluation system and method are composed of an acid quantitative supply module, a carbon dioxide quantitative supply module, a hot air quantitative supply module, a cold air quantitative supply module, a contaminated soil slag storage module, a liquid collection detection module and a control module. Among them, the acid quantitative supply module is composed of an aqueous solution tank 1, a first liquid pump 2, a first electromagnetic flow valve 3, an acid tank 4, a second liquid pump 5, a second electromagnetic flow valve 6, a regulating tank 7, a pH electrode 8, an agitator 9, a third liquid pump 10 and a third electromagnetic flow valve 11. The liquid outlet of the aqueous solution tank 1 is connected to the liquid inlet of the first electromagnetic flow valve 3 through a pipeline, and the pipeline between the aqueous solution tank 1 and the first electromagnetic flow valve 3 is provided with a first liquid pump. Pump 2, the acid tank 4 is arranged on the right side of the water tank 1, the liquid outlet of the acid tank 4 is connected to the liquid inlet of the second electromagnetic flow valve 6 through a pipeline, the pipeline between the acid tank 4 and the second electromagnetic flow valve 6 is provided with a second liquid pump 5, the liquid outlet of the first electromagnetic flow valve 3 and the liquid outlet of the second electromagnetic flow valve 6 are respectively connected to the liquid inlet of the regulating tank 7 through pipelines, the agitator 9 is arranged at the bottom of the regulating tank 7, the pH electrode 8 is arranged on the side wall of the regulating tank 7, the third electromagnetic flow valve 11 is arranged below the regulating tank 7, the liquid outlet of the regulating tank 7 is connected to the liquid inlet of the third electromagnetic flow valve 11 through a pipeline, and the pipeline between the regulating tank 7 and the third electromagnetic flow valve 11 is provided with a third liquid pump 10.

[0042] In a preferred embodiment, the carbon dioxide quantitative supply module is composed of a carbon dioxide storage tank 12, a first air pump 13 and a first gas flow meter 14. The carbon dioxide storage tank 12 is arranged on the right side of the acid tank 4, and the air outlet of the carbon dioxide storage tank 12 is connected to the air inlet of the first gas flow meter 14 through a pipeline. The first air pump 13 is arranged on the pipeline between the carbon dioxide storage tank 12 and the first gas flow meter 14.

[0043] In a preferred embodiment, the hot air quantitative supply module is composed of an air heater 15, a second air pump 16, a hot air tank 17, a third air pump 18 and a second gas flow meter 19. The hot air tank 17 is arranged on the right side of the carbon dioxide storage tank 12, and an air heater 15 is arranged between the carbon dioxide storage tank 12 and the hot air tank 17. The air outlet of the air heater 15 is connected to the air inlet of the hot air tank 17 through a pipeline, and the second air pump 16 is arranged on the pipeline between the air heater 15 and the hot air tank 17. The second gas flow meter 19 is arranged below the hot air tank 17, and the air outlet of the hot air tank 17 is connected to the air inlet of the second gas flow meter 19 through a pipeline, and the third air pump 18 is arranged on the pipeline between the hot air tank 17 and the second gas flow meter 19.

[0044] According to a preferred solution, the cold air quantitative supply module is composed of an air cooler 20, a fourth air pump 21, a cold air tank 22, a fifth air pump 23 and a third gas flow meter 24. The cold air tank 22 is arranged on the right side of the hot air tank 17, and the air cooler 20 is arranged on the right side of the cold air tank 22. The air outlet of the air cooler 20 is connected to the air inlet of the cold air tank 22 through a pipeline, and the pipeline between the air cooler 20 and the cold air tank 22 is provided with the fourth air pump 21. The third gas flow meter 24 is arranged below the cold air tank 22. The air outlet of the cold air tank 22 is connected to the air inlet of the third gas flow meter 24 through a pipeline, and the fifth air pump 23 is provided on the pipeline between the cold air tank 22 and the third gas flow meter 24.

[0045] The preferred solution is that the contaminated mud slag storage module is composed of a mud slag storage bin 25, an outer shell 26, an insulation layer 27, an inner shell 28, a mud slag multi-parameter sensor 29, an exhaust valve 30, a liquid nozzle 31, a humidity sensor 32, a temperature sensor 33, a carbon dioxide concentration sensor 34, a gas nozzle 35, a sealing lock 36, and a movable bin plate 37. The mud slag storage bin 25 is located at the lower side of the regulating tank 7. The mud slag storage bin 25 is composed of an outer shell 26, an insulation layer 27, and an inner shell 28. The shell layer 26 is arranged on the outer surface of the inner shell layer 28, an insulation layer 27 is arranged between the outer shell layer 26 and the inner shell layer 28, a multi-parameter sensor 29 for soil and slag is arranged on the inner wall side surface of the inner shell layer 28, an exhaust valve 30, a liquid nozzle 31, a humidity sensor 32, a temperature sensor 33, a carbon dioxide concentration sensor 34, and a gas nozzle 35 are arranged on the upper surface of the inner wall of the soil and slag storage bin 25, a movable bin plate 37 is arranged on the outer side of one end of the soil and slag storage bin 25, and a sealing lock 36 is arranged at both ends of the movable bin plate 37.

[0046] In a preferred embodiment, the liquid collection detection module consists of a liquid collection pipe 38, a filter 39, a fourth liquid pump 40, a liquid storage tank 41, a water quality multi-parameter sensor 42 and a data collector 43. The liquid collection pipe 38 is arranged at the bottom of the mud slag storage bin 25, the liquid inlet of the liquid collection pipe 37 is connected to the inside of the mud slag storage bin 25, the liquid outlet of the liquid collection pipe 38 is connected to the liquid inlet of the fourth liquid pump 40 through a pipeline, the pipeline between the liquid collection pipe 38 and the fourth liquid pump 40 is provided with a filter 39, the liquid outlet of the fourth liquid pump 40 is connected to the liquid inlet of the liquid storage tank 41 through a pipeline, the water quality multi-parameter sensor 42 is arranged at the bottom of the inner wall of the liquid storage tank 41, and the data collector 43 is arranged at the upper end of the liquid storage tank 41.

[0047] In a preferred solution, the control module consists of an integrated controller 44 and a control computer 45 . The integrated controller 44 is arranged above the soil slag storage bin 25 , and the control computer 45 is arranged on the right side of the integrated controller 44 .

[0048] The specific working principle is as follows:

[0049] Preparation process: After the heavy metal contaminated soil residue is repaired and accepted, a representative typical repaired soil residue is selected as the evaluation object, and the sealing lock 36 and the movable bin plate 37 are opened respectively to add the repaired soil residue to be evaluated into the soil residue storage bin 25, and the paving thickness and compaction degree of the repaired soil residue to be evaluated are determined according to the secondary utilization scenario. Subsequently, the sealing lock 36 and the movable bin plate 37 are closed to enter the evaluation process. The specific evaluation method can select one or more of the following evaluation methods according to the secondary utilization scenario and the acceptance method of the repaired soil residue. After the evaluation method and evaluation method are determined, the integrated controller 44 and the control computer 45 are started, and the evaluation method and evaluation method are input into the control computer 45.

[0050] The evaluation methods of this system include two methods: restoration effect evaluation and long-term stability evaluation. The restoration effect evaluation includes two methods: rainfall erosion and acid erosion. The long-term stability evaluation includes carbonization erosion, high temperature erosion, low temperature erosion, dry-wet erosion and freeze-thaw erosion.

[0051] The restoration effect assessment includes two parts: rainfall erosion assessment and acid erosion assessment. The specific processes of each part are as follows:

[0052] Simulate rainfall erosion: First, calculate the required volume of distilled water according to the rainfall to be simulated; then, the first pump 2 and the first electromagnetic flow valve 3 are powered on and started, and the first pump 2 pumps distilled water from the water tank 1 into the regulating tank 7, and the first electromagnetic flow valve 3 controls the volume of distilled water at all times; the third pump 10 and the third electromagnetic flow valve 11 are powered on and started, and the third pump 10 pumps distilled water from the regulating tank 7, and the distilled water passes through the third electromagnetic flow valve 11, and the third electromagnetic flow valve 11 controls the flow of distilled water, and the liquid nozzle 31 sprays the distilled water evenly on the surface of the repaired soil. When the predetermined rainfall is reached, the first pump 2, the first electromagnetic flow valve 3, the third pump 10, and the third electromagnetic flow valve 11 are powered off and closed, waiting for the liquid collection test module to start.

[0053] Simulating acid erosion: First, according to the properties of the acid to be simulated, the required volumes of distilled water and acid are calculated respectively; then, the first liquid pump 2, the first electromagnetic flow valve 3, the second liquid pump 5, and the second electromagnetic flow valve 6 are powered on and started respectively, the first liquid pump 2 extracts distilled water from the water tank 1 into the regulating tank 7, the first electromagnetic flow valve 3 always controls the volume of distilled water, the second liquid pump 5 extracts the acid from the acid tank 4 into the regulating tank 7, the second electromagnetic flow valve 6 always controls the volume of the acid, the pH electrode 8 and the stirrer 9 are powered on and started respectively, the stirrer 9 mixes the acid and distilled water evenly, the pH electrode 8 always monitors the pH value of the acid solution in the regulating tank 7, the third liquid pump 10 and the third electromagnetic flow valve 11 are powered on and started, the third liquid pump 10 extracts the prepared acid solution in the regulating tank 7, the third electromagnetic flow valve 11 controls the flow of the acid solution, and the liquid nozzle 31 evenly sprays the acid on the surface of the repair soil. When the predetermined amount of acid liquid is reached, the first liquid pump 2, the first electromagnetic flow valve 3, the second liquid pump 5, the second electromagnetic flow valve 6, the agitator 9, the third liquid pump 10, and the third electromagnetic flow valve 11 are powered off and closed, waiting for the liquid collection test module to start.

[0054] The long-term stability evaluation includes five parts: carbonization erosion, high temperature erosion, low temperature erosion, dry and wet erosion, and freeze-thaw erosion. The specific process of each part is as follows:

[0055] Simulating carbonization erosion: First, according to the carbonization erosion working conditions to be simulated, the required volume and concentration of carbon dioxide are calculated; then, the first vacuum pump 13, the first gas flowmeter 14, the carbon dioxide concentration sensor 34 and the gas nozzle 35 are powered on and started respectively, the first vacuum pump 13 extracts carbon dioxide from the carbon dioxide storage tank 12, the first gas flowmeter 14 controls the extraction volume of carbon dioxide, the gas nozzle 35 sprays carbon dioxide evenly into the mud slag storage bin 25, and the carbon dioxide concentration sensor 34 monitors the carbon dioxide concentration in the mud slag storage bin 25 in real time. When the carbon dioxide concentration in the mud slag storage bin 25 reaches a predetermined value, the first vacuum pump 13 and the first gas flowmeter 14 are powered off and closed. When the predetermined carbonization erosion time node is reached, the first vacuum pump 13, the first gas flowmeter 14, the carbon dioxide concentration sensor 34 and the gas nozzle 35 are powered off and closed. When the carbonization erosion time reaches the predetermined time, according to the selected repair effect evaluation method, the above-mentioned simulated rainfall or simulated acid erosion process is started, and after the simulated rainfall or simulated acid erosion process is completed, wait for the liquid collection test module to start.

[0056] Simulate high temperature erosion: First, calculate the required high temperature value according to the high temperature erosion working condition to be simulated; the air heater 15 and the second vacuum pump 16 are powered on and started respectively, and the second vacuum pump 16 extracts the heated air into the hot air tank 17 for storage, and then the third vacuum pump 18 and the second gas flow meter 19 are powered on and started, and the third vacuum pump 18 extracts the hot air from the hot air tank 17, and the second gas flow meter 19 controls the extraction volume of the hot air, and the gas nozzle 35 sprays the hot air evenly into the mud slag storage bin 25, and the temperature sensor 33 monitors the temperature in the mud slag storage bin 25 in real time. When the temperature in the mud slag storage bin 25 reaches the high temperature preset value, the third vacuum pump 18 and the second gas flow meter 19 are powered off and shut down. When the high temperature erosion time reaches the preset time, according to the selected stability effect evaluation method, start the above-mentioned simulated rainfall or simulated acid erosion process, and after the simulated rainfall or simulated acid erosion process is completed, wait for the liquid collection test module to start.

[0057] Simulate low temperature erosion: First, calculate the required low temperature value according to the low temperature erosion working condition to be simulated; the air cooler 20 and the fourth vacuum pump 21 are powered on and started respectively, and the fourth vacuum pump 21 extracts the refrigerated air into the cold air tank 22 for storage, and then the fourth vacuum pump 21 and the third gas flow meter 24 are powered on and started, and the fourth vacuum pump 21 extracts the cold air from the cold air tank 22, and the third gas flow meter 24 controls the extraction volume of the cold air, and the gas nozzle 35 sprays the cold air evenly into the mud slag storage bin 25, and the temperature sensor 33 monitors the temperature in the mud slag storage bin 25 in real time. When the temperature in the mud slag storage bin 25 reaches the preset low temperature value, the fourth vacuum pump 21 and the third gas flow meter 24 are powered off and shut down. When the low temperature erosion time reaches the preset time, according to the selected repair effect evaluation method, start the above-mentioned simulated rainfall or simulated acid erosion process, and after the simulated rainfall or simulated acid erosion process is completed, wait for the liquid collection test module to start.

[0058] Simulating dry and wet erosion: First, according to the dry and wet erosion conditions to be simulated, calculate the temperature and water addition amount required for dry and wet erosion; the dry erosion process is as follows: the air heater 15 and the second vacuum pump 16 are powered on and started respectively, and the second vacuum pump 16 draws the heated air into the hot air tank 17 for storage, and then the third vacuum pump 18 and the second gas flow meter 19 are powered on and started, and the third vacuum pump 18 draws the hot air out of the hot air tank 17, and the second gas flow meter 19 controls the extraction volume of the hot air, and the gas nozzle 35 evenly sprays the hot air into the soil slag storage bin 25, and the temperature sensor 33 monitors the temperature in the soil slag storage bin 25 in real time. When the temperature in the soil slag storage bin 25 reaches a predetermined value, the third vacuum pump 18 and the second gas flow meter 19 are powered off and shut down. The wet erosion process is as follows: the first liquid pump 2 and the first electromagnetic flow valve 3 are powered on and started, the first liquid pump 2 pumps distilled water from the aqueous tank 1 into the regulating tank 7, the first electromagnetic flow valve 3 controls the volume of distilled water at all times, the third liquid pump 10 and the third electromagnetic flow valve 11 are powered on and started, the third liquid pump 10 pumps distilled water from the regulating tank 7, the distilled water passes through the third electromagnetic flow valve 11, the third electromagnetic flow valve 11 controls the flow of the distilled water, and the liquid nozzle 31 sprays the distilled water evenly on the surface of the repair soil.

[0059] The above is a complete dry and wet erosion test. The dry and wet erosion test is cycled according to the above process for the set number of times, and then the test is stopped. When the dry and wet erosion time reaches the preset time, the above simulated rainfall or simulated acid erosion process is started according to the selected repair effect evaluation method. After the simulated rainfall or simulated acid erosion process is completed, wait for the liquid collection test module to start.

[0060] Simulating freeze-thaw erosion: First, according to the freeze-thaw erosion condition to be simulated, the temperature required for freeze-thaw erosion is calculated; the freezing erosion process is as follows: the air cooler 20 and the fourth vacuum pump 21 are powered on and started respectively, the fourth vacuum pump 21 draws the refrigerated air into the cold air tank 22 for storage, then the fourth vacuum pump 21 and the third gas flow meter 24 are powered on and started, the fourth vacuum pump 21 draws cold air from the cold air tank 22, the third gas flow meter 24 controls the extraction volume of cold air, the gas nozzle 35 sprays the cold air evenly into the soil slag storage bin 25, the temperature sensor 33 monitors the temperature in the soil slag storage bin 25 in real time, and when the temperature in the soil slag storage bin 25 reaches the preset low temperature value, the fourth vacuum pump 21 and the third gas flow meter 24 are powered off and shut down. The melting erosion process is as follows: the air heater 15 and the second vacuum pump 16 are powered on and started respectively, and the heated air is stored in the hot air tank 17. Then the third vacuum pump 18 and the second gas flow meter 19 are powered on and started. The third vacuum pump 18 extracts the hot air from the hot air tank 17. The second gas flow meter 19 controls the extraction volume of the hot air. The gas nozzle 35 sprays the hot air evenly into the soil slag storage bin 25. The temperature sensor 33 monitors the temperature in the soil slag storage bin 25 in real time. When the temperature in the soil slag storage bin 25 reaches a predetermined value, the third vacuum pump 18 and the second gas flow meter 19 are powered off and shut down. The above is a complete freeze-thaw erosion test. The freeze-thaw erosion test is cycled according to the above process to the set number of times, and then the test is stopped.

[0061] When the freeze-thaw erosion time reaches the predetermined time, the above-mentioned simulated rainfall or simulated acid erosion process is started according to the selected repair effect evaluation method. After the simulated rainfall or simulated acid erosion process is completed, wait for the liquid collection test module to start.

[0062] Liquid collection test: When the repaired mud residue completes the corresponding evaluation process, the liquid collecting pipe 38 and the fourth liquid pump 40 are powered on. Under the extraction of the fourth liquid pump 40, the liquid in the mud residue enters the liquid storage tank 41 through the liquid collecting pipe 38 and the filter 39. The filter 39 removes impurities in the liquid. The water quality multi-parameter sensor 42 and the data acquisition device 44 are powered on. The water quality multi-parameter sensor 42 conducts a comprehensive test on the liquid in the liquid storage tank 41 to complete the test of four parameters: pH, conductivity, redox potential, and heavy metal concentration. The test parameters are transmitted to the control computer 45 through the data acquisition device 44 for storage.

[0063] Among them, the liquid tank 1, the first liquid pump 2, the first electromagnetic flow valve 3, the acid tank 4, the second liquid pump 5, the second electromagnetic flow valve 6, the regulating tank 7, the pH electrode 8, the stirrer 9, the third liquid pump 10, the third electromagnetic flow valve 11, the carbon dioxide storage tank 12, the first air pump 13, the first gas flow meter 14, the air heater 15, the second air pump 16, the hot air tank 17, the third air pump 18, the second gas flow meter 19, the air cooler 20, the fourth air pump 21, the cold air tank 22, The fifth vacuum pump 23, the third gas flow meter 24, the soil residue storage bin 25, the outer shell layer 26, the insulation layer 27, the inner shell layer 28, the soil residue multi-parameter sensor 29, the exhaust valve 30, the liquid nozzle 31, the humidity sensor 32, the temperature sensor 33, the carbon dioxide concentration sensor 34, the gas nozzle 35, the movable bin plate 36, the sealing lock 37, the liquid collecting pipe 38, the filter 39, the fourth liquid pump 40, the liquid storage tank 41, the water quality multi-parameter sensor 42 and the data collector 44 are all made of corrosion-resistant materials.

[0064] Due to the adoption of the above technical scheme, the system and method for evaluating the restoration effect of heavy metal contaminated soil residue of the present invention respectively completes two evaluation methods of rainfall erosion and acid erosion through the acid quantitative supply module, respectively completes five evaluation methods of carbonization erosion, high temperature erosion, low temperature erosion, dry and wet erosion and freeze-thaw erosion through the carbon dioxide quantitative supply module, the hot air quantitative supply module and the cold air quantitative supply module, and realizes the refined control of the whole process of heavy metal contaminated soil residue restoration effect and long-term stability evaluation through the contaminated soil residue storage module, the liquid collection detection module and the control module. The present invention has a simple structure, convenient operation, low cost, can be applied in large-scale engineering, and realizes scientific, comprehensive, efficient and rapid evaluation of various heavy metal contaminated soil residue restoration effects and long-term stability.

[0065] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. All designs that are the same or similar to the present invention fall within the protection scope of the present invention.

Claims

1. A method for evaluating the restoration effect of heavy metal contaminated soil residue, characterized in that: The steps include: After the restoration of heavy metal contaminated soil residue is completed and accepted, a representative typical restoration soil residue is selected as the evaluation object, and the sealing lock and movable warehouse board are opened respectively to add the restoration soil residue to be evaluated into the soil residue storage bin, and the laying thickness and compaction degree of the restoration soil residue to be evaluated are determined according to the secondary utilization scenario. Subsequently, the sealing lock and movable warehouse board are closed to enter the evaluation process. The specific evaluation method is selected according to the secondary utilization scenario and acceptance method of the restoration soil residue. After the evaluation method and evaluation method are determined, the integrated controller and the control computer are started, and the evaluation method and evaluation method are input into the control computer; The evaluation methods of this system include two methods: restoration effect evaluation and long-term stability evaluation. The restoration effect evaluation includes two methods: rainfall erosion and acid erosion; the long-term stability evaluation includes carbonization erosion, high temperature erosion, low temperature erosion, dry-wet erosion and freeze-thaw erosion. The restoration effect assessment includes two parts: rainfall erosion assessment and acid erosion assessment. The specific processes of each part are as follows: Simulating rainfall erosion: First, according to the rainfall to be simulated, the required volume of distilled water is calculated; then, the first liquid pump and the first electromagnetic flow valve are powered on and started, the first liquid pump extracts distilled water from the water tank into the regulating tank, the first electromagnetic flow valve controls the volume of distilled water at all times, the third liquid pump and the third electromagnetic flow valve are powered on and started, the third liquid pump extracts distilled water from the regulating tank, the distilled water passes through the third electromagnetic flow valve, the third electromagnetic flow valve controls the flow of distilled water, and the liquid nozzle sprays the distilled water evenly on the surface of the repaired soil; when the predetermined rainfall is reached, the first liquid pump, the first electromagnetic flow valve, the third liquid pump, and the third electromagnetic flow valve are powered off and closed, waiting for the liquid collection test module to start; Simulate acid corrosion: First, according to the properties of the acid to be simulated, calculate the required volumes of distilled water and acid agent respectively; then, the first liquid pump, the first electromagnetic flow valve, the second liquid pump, and the second electromagnetic flow valve are powered on and started respectively, the first liquid pump pumps distilled water from the water tank into the regulating tank, the first electromagnetic flow valve always controls the volume of distilled water, the second liquid pump pumps the acid agent from the acid agent tank into the regulating tank, the second electromagnetic flow valve always controls the volume of the acid agent, the pH electrode and the stirrer are powered on and started respectively, the stirrer mixes the acid agent and distilled water evenly, The pH electrode constantly monitors the pH value of the acid solution in the regulating tank, the third liquid pump and the third electromagnetic flow valve are powered on and started, the third liquid pump extracts the prepared acid solution in the regulating tank, the third electromagnetic flow valve controls the flow of the acid solution, and the liquid nozzle sprays the acid evenly on the surface of the repair soil; when the predetermined amount of acid is reached, the first liquid pump, the first electromagnetic flow valve, the second liquid pump, the second electromagnetic flow valve, the agitator, the third liquid pump, and the third electromagnetic flow valve are powered off and closed, waiting for the liquid collection test module to start; The long-term stability evaluation includes five parts: carbonization erosion, high temperature erosion, low temperature erosion, dry and wet erosion, and freeze-thaw erosion. The specific process of each part is as follows: Simulating carbonization erosion: First, according to the carbonization erosion working conditions to be simulated, the required volume of carbon dioxide and the concentration of carbon dioxide are calculated; then, the first vacuum pump, the first gas flowmeter, the carbon dioxide concentration sensor and the gas nozzle are powered on and started respectively, the first vacuum pump extracts carbon dioxide from the carbon dioxide storage tank, the first gas flowmeter controls the extraction volume of carbon dioxide, the gas nozzle sprays carbon dioxide evenly into the mud slag storage bin, and the carbon dioxide concentration sensor monitors the carbon dioxide concentration in the mud slag storage bin in real time. When the carbon dioxide concentration in the mud slag storage bin reaches a predetermined value, the first vacuum pump and the first gas flowmeter are powered off and shut down; when the predetermined carbonization erosion time node is reached, the first vacuum pump, the first gas flowmeter, the carbon dioxide concentration sensor and the gas nozzle are powered off and shut down; when the carbonization erosion time reaches the predetermined time, according to the selected repair effect evaluation method, the above-mentioned simulated rainfall or simulated acid erosion process is started, and after the simulated rainfall or simulated acid erosion process is completed, wait for the liquid collection test module to start; Simulating high-temperature erosion: First, according to the high-temperature erosion condition to be simulated, the required high-temperature value is calculated; the air heater and the second vacuum pump are powered on and started respectively, and the second vacuum pump draws the heated air into the hot air tank for storage, and then the third vacuum pump and the second gas flow meter are powered on and started, and the third vacuum pump draws the hot air out of the hot air tank, and the second gas flow meter controls the extraction volume of the hot air, and the gas nozzle sprays the hot air evenly into the mud slag storage bin, and the temperature sensor monitors the temperature in the mud slag storage bin in real time. When the temperature in the mud slag storage bin reaches the preset high-temperature value, the third vacuum pump and the second gas flow meter are powered off and shut down; when the high-temperature erosion time reaches the preset time, according to the selected stability effect evaluation method, the above-mentioned simulated rainfall or simulated acid erosion process is started, and after the simulated rainfall or simulated acid erosion process is completed, wait for the liquid collection test module to start; Simulate low-temperature erosion: First, calculate the required low-temperature value according to the low-temperature erosion working condition to be simulated; the air cooler and the fourth vacuum pump are powered on and started respectively, and the fourth vacuum pump draws the refrigerated air into the cold air tank for storage, and then the fourth vacuum pump and the third gas flow meter are powered on and started, and the fourth vacuum pump draws cold air from the cold air tank, and the third gas flow meter controls the extraction volume of cold air, and the gas nozzle sprays the cold air evenly into the mud slag storage bin, and the temperature sensor monitors the temperature in the mud slag storage bin in real time. When the temperature in the mud slag storage bin reaches the preset low-temperature value, the fourth vacuum pump and the third gas flow meter are powered off and shut down; when the low-temperature erosion time reaches the preset time, according to the selected repair effect evaluation method, start the above-mentioned simulated rainfall or simulated acid erosion process, and after the simulated rainfall or simulated acid erosion process is completed, wait for the liquid collection test module to start; Simulating dry and wet erosion: First, according to the dry and wet erosion conditions to be simulated, calculate the temperature and water addition required for dry and wet erosion; The dry erosion process is as follows: the air heater and the second vacuum pump are powered on and started respectively, the second vacuum pump pumps the heated air into the hot air tank for storage, then the third vacuum pump and the second gas flow meter are powered on and started, the third vacuum pump pumps the hot air out of the hot air tank, the second gas flow meter controls the volume of the hot air pumped out, the gas nozzle sprays the hot air evenly into the soil slag storage bin, the temperature sensor monitors the temperature in the soil slag storage bin in real time, when the temperature in the soil slag storage bin reaches a predetermined value, the third vacuum pump and the second gas flow meter are powered off and shut down; the wet erosion process is as follows: the first liquid pump and the first electromagnetic flow valve are powered on and started, the first liquid pump pumps the distilled water from the water agent tank into the regulating tank, the first electromagnetic flow valve controls the volume of the distilled water at all times, the third liquid pump and the third electromagnetic flow valve are powered on and started, the third liquid pump pumps the distilled water out of the regulating tank, the distilled water passes through the third electromagnetic flow valve, the third electromagnetic flow valve controls the flow of the distilled water, and the liquid nozzle sprays the distilled water evenly on the surface of the repaired soil; The above is a complete dry and wet erosion test. The dry and wet erosion test is cycled according to the above process for the set number of times, and then the test is stopped; when the dry and wet erosion time reaches the preset time, the above simulated rainfall or simulated acid erosion process is started according to the selected restoration effect evaluation method. After the simulated rainfall or simulated acid erosion process is completed, wait for the liquid collection test module to start; Simulating freeze-thaw erosion: First, calculate the temperature required for freeze-thaw erosion according to the freeze-thaw erosion conditions to be simulated; The freezing erosion process is as follows: the air cooler and the fourth vacuum pump are powered on and started respectively, the fourth vacuum pump draws the refrigerated air into the cold air tank for storage, then the fourth vacuum pump and the third gas flow meter are powered on and started, the fourth vacuum pump draws the cold air out of the cold air tank, the third gas flow meter controls the extraction volume of the cold air, the gas nozzle sprays the cold air evenly into the mud slag storage bin, the temperature sensor monitors the temperature in the mud slag storage bin in real time, when the temperature in the mud slag storage bin reaches the preset low temperature value, the fourth vacuum pump and the third gas flow meter are powered off and shut down; the melting erosion process is as follows: the air heater, the second The vacuum pumps are powered on and started respectively to store the heated air in the hot air tank. Then the third vacuum pump and the second gas flow meter are powered on and started. The third vacuum pump extracts the hot air from the hot air tank. The second gas flow meter controls the extraction volume of the hot air. The gas nozzle sprays the hot air evenly into the mud slag storage bin. The temperature sensor monitors the temperature in the mud slag storage bin in real time. When the temperature in the mud slag storage bin reaches a predetermined value, the third vacuum pump and the second gas flow meter are powered off and shut down. The above is a complete freeze-thaw erosion test. The freeze-thaw erosion test is cycled according to the above process to the set number of times, and then the test is stopped. When the freeze-thaw erosion time reaches the predetermined time, the above-mentioned simulated rainfall or simulated acid erosion process is started according to the selected restoration effect evaluation method. After the simulated rainfall or simulated acid erosion process is completed, wait for the liquid collection test module to start; Liquid collection test: When the repaired soil residue completes the corresponding evaluation process, the liquid collecting pipe and the fourth liquid pump are powered on. Under the pumping of the fourth liquid pump, the liquid in the soil residue enters the liquid storage tank through the liquid collecting pipe and the filter. The filter removes impurities in the liquid. The water quality multi-parameter sensor and the data collector are powered on. The water quality multi-parameter sensor conducts a comprehensive test on the liquid in the liquid storage tank and completes the test of four parameters: pH, conductivity, redox potential, and heavy metal concentration. The test parameters are transmitted to the control computer through the data collector for storage.

2. A heavy metal contaminated soil residue remediation effect evaluation system, characterized in that: The heavy metal contaminated soil residue remediation effect evaluation method as claimed in claim 1 is adopted; The system includes an acid quantitative supply module, a carbon dioxide quantitative supply module, a hot gas quantitative supply module, a cold gas quantitative supply module, a contaminated mud slag storage module, a liquid collection detection module and a control module; The acid quantitative supply module is used to provide one or more acidic solution environments selected from simulated rainfall, simulated acid rain, simulated acetic acid, simulated gastric acid and simulated plant acid in a timely and quantitative manner; the liquid outlet of the acid quantitative supply module is connected to the liquid nozzle of the contaminated mud slag storage module through a pipeline; The carbon dioxide quantitative supply module is used to provide a simulated carbonization erosion environment in a timely and quantitative manner; the gas outlet of the carbon dioxide quantitative supply module is connected to the gas nozzle of the contaminated soil slag storage module through a pipeline; The hot gas quantitative supply module is used to provide a simulated high-temperature erosion environment in a timely and quantitative manner; the hot gas quantitative supply module is used in conjunction with the acid liquid quantitative supply module to provide a dry and wet erosion environment; the gas outlet of the hot gas quantitative supply module is connected to the gas nozzle of the contaminated soil slag storage module through a pipeline; The cold air quantitative supply module is used to provide simulated low-temperature erosion in a timely and quantitative manner; the hot air quantitative supply module is used in conjunction with the cold air quantitative supply module to provide a simulated freeze-thaw erosion environment; the air outlet of the cold air quantitative supply module is connected to the gas nozzle of the contaminated soil slag storage module through a pipeline; The contaminated mud slag storage module is used to monitor the environmental variables of the mud slag storage bin, and to control the corresponding acid quantitative supply module, carbon dioxide quantitative supply module, hot gas quantitative supply module and cold gas quantitative supply module by timing and quantitative feedback; The contaminated mud slag storage module is composed of a mud slag storage bin, an outer shell layer, an insulation layer, an inner shell layer, a mud slag multi-parameter sensor, an exhaust valve, a liquid nozzle, a humidity sensor, a temperature sensor, a carbon dioxide concentration sensor, a gas nozzle, a sealing lock, and a movable bin plate. The mud slag storage bin is located at the lower side of the regulating tank. The mud slag storage bin is composed of an outer shell layer, an insulation layer, and an inner shell layer. The outer shell layer is arranged on the outer surface of the inner shell layer, and an insulation layer is arranged between the outer shell layer and the inner shell layer. The mud slag multi-parameter sensor is arranged on the side surface of the inner wall of the inner shell layer. An exhaust valve, a liquid nozzle, a humidity sensor, a temperature sensor, a carbon dioxide concentration sensor, and a gas nozzle are arranged on the upper surface of the inner wall of the mud slag storage bin. The movable bin plate is arranged on the outer side of one end of the mud slag storage bin, and the sealing locks are arranged at both ends of the movable bin plate. The liquid collection detection module is used to collect and analyze soil residue after one or more processes of simulated rainfall, simulated acid solution environment, simulated carbonization erosion environment, simulated high temperature erosion environment, simulated low temperature erosion environment, simulated freeze-thaw erosion environment and simulated dry-wet erosion environment; The control module is used to control the coordinated work of the acid quantitative supply module, the carbon dioxide quantitative supply module, the hot air quantitative supply module, the cold air quantitative supply module, the contaminated mud slag storage module and the liquid collection detection module; The acid quantitative supply module includes a water tank, a first liquid pump, a first electromagnetic flow valve, an acid tank, a second liquid pump, a second electromagnetic flow valve, a regulating tank, a pH electrode, a stirrer, a third liquid pump and a third electromagnetic flow valve; The acid quantitative supply module is used to calculate the required volumes of distilled water and acid agent according to the properties of the acid to be simulated, and evenly mix the acid agent and distilled water. The pH electrode constantly monitors the pH value of the acid solution in the regulating tank and evenly sprays it in the mud slag storage bin through the nozzle. The carbon dioxide quantitative supply module includes a first air pump, a first gas flow meter, a carbon dioxide concentration sensor and a gas nozzle. The first air pump extracts carbon dioxide from the carbon dioxide storage tank, the first gas flow meter controls the extraction volume of carbon dioxide, the gas nozzle uniformly sprays carbon dioxide into the soil slag storage bin, and the carbon dioxide concentration sensor monitors the carbon dioxide concentration in the soil slag storage bin in real time. When the carbon dioxide concentration in the soil slag storage bin reaches a predetermined value, the first air pump and the first gas flow meter are powered off and shut down; when the predetermined carbonization erosion time node is reached, the first air pump, the first gas flow meter, the carbon dioxide concentration sensor and the gas nozzle are powered off and shut down; The hot air quantitative supply module includes an air heater, a second air pump, a hot air tank, a third air pump, a second gas flow meter, a gas nozzle and a temperature sensor; The air heater and the second vacuum pump are powered on and started respectively, and the second vacuum pump draws the heated air into the hot air tank for storage, and then the third vacuum pump and the second gas flow meter are powered on and started, and the third vacuum pump draws the hot air out of the hot air tank, and the second gas flow meter controls the extraction volume of the hot air, and the gas nozzle sprays the hot air evenly into the mud slag storage bin, and the temperature sensor monitors the temperature in the mud slag storage bin in real time, and when the temperature in the mud slag storage bin reaches a preset high temperature value, the third vacuum pump and the second gas flow meter are powered off and shut down; The cold air quantitative supply module includes an air cooler, a fourth air pump, a cold air tank, a third gas flow meter, a temperature sensor and a gas nozzle; The air cooler and the fourth vacuum pump are powered on and started respectively, and the fourth vacuum pump draws the refrigerated air into the cold air tank for storage, and then the fourth vacuum pump and the third gas flow meter are powered on and started, and the fourth vacuum pump draws the cold air out of the cold air tank, and the third gas flow meter controls the drawn volume of the cold air, and the gas nozzle sprays the cold air evenly into the mud slag storage bin, and the temperature sensor monitors the temperature in the mud slag storage bin in real time, and when the temperature in the mud slag storage bin reaches a preset low temperature value, the fourth vacuum pump and the third gas flow meter are powered off and shut down; The liquid collection detection module includes a liquid collection pipe, a fourth liquid pump, a filter, a liquid storage tank, a water quality multi-parameter sensor and a data collector; The liquid collecting pipe and the fourth liquid pump are powered on and started. Under the pumping of the fourth liquid pump, the liquid in the mud residue enters the liquid storage tank through the liquid collecting pipe and the filter. The filter removes impurities in the liquid. The water quality multi-parameter sensor and the data collector are powered on and started. The water quality multi-parameter sensor conducts a comprehensive test on the liquid in the liquid storage tank and completes the test of four parameters: pH, conductivity, redox potential, and heavy metal concentration. The test parameters are transmitted to the control computer through the data collector for storage.

3. The heavy metal contaminated soil residue remediation effect evaluation system according to claim 2 is characterized by: The connecting pipes are all corrosion-resistant hoses.

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