A collaborative resource processing system and method for waste packaging barrels and waste salt

Abstract

The present invention relates to the field of waste resource utilization, and in particular to a system and method for the coordinated resource utilization of waste packaging barrels and waste salt. A system for the coordinated resource utilization of waste packaging barrels and waste salt comprises a waste packaging barrel pretreatment subsystem and a waste salt electrochemical treatment subsystem; wherein the waste packaging barrel pretreatment subsystem comprises a cleaning unit for cleaning the iron material formed by the waste packaging barrel; and the alkaline cleaning liquid used for cleaning is obtained by electrolysis in the waste salt electrochemical treatment subsystem, and the chlorine gas obtained by electrolysis in the waste salt electrochemical treatment subsystem can be used as an oxidant for the treatment of the cleaning waste liquid, degrades some organic pollutants, and reduces the difficulty of subsequent deep treatment.

Description

Technical Field

[0001] The present invention relates to the field of waste resource utilization, and in particular to a system and method for collaborative resource processing of waste packaging barrels and waste salt. Background Art

[0002] Abandoned packaging barrels containing or directly contaminated with hazardous waste are classified as hazardous waste, code 900-041-49. Traditional scrap iron packaging barrels are washed with organic solvents and then recycled. The use of organic solvents in the production process is highly dangerous and will cause secondary pollution. Therefore, from the perspective of environmental safety, an alkaline aqueous solution cleaning process is used instead. However, the COD concentration of the wastewater after washing is high, the biodegradability is poor, and it is difficult to treat. At the same time, the dirt on the iron sheet is difficult to clean and separate. On the other hand, the disposal cost of waste salt is extremely high, which has become a difficult point in management. In order to solve the above problems, a new type of efficient resource recovery treatment technology has been developed. Summary of the invention

[0003] In order to solve the above problems, the first purpose of the present invention is to provide a system for the coordinated resource treatment of waste packaging barrels and waste salt, and the second purpose of the present invention is to provide a method for the coordinated resource treatment of waste packaging barrels and waste salt. The above-mentioned coordinated resource treatment system and method can use waste salt to generate alkaline solution and chlorine gas online. The alkaline solution can be used as a cleaning agent, and the chlorine gas can be used as an oxidant to treat the wastewater after cleaning and improve its biodegradability.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0005] A waste packaging barrel and waste salt collaborative resource processing system, comprising a waste packaging barrel pretreatment subsystem and a waste salt electrochemical treatment subsystem; the waste packaging barrel pretreatment subsystem comprises a cleaning unit for cleaning iron materials;

[0006] The waste salt electrochemical treatment subsystem includes an electrochemical reactor and a preparation tank for preparing an electrolyte whose main component is chloride salt; the electrochemical reactor includes a cathode chamber, an anode chamber, and a cathode and an anode respectively located in the cathode chamber and the anode chamber and connected to a power source; the cathode chamber and the anode chamber are separated by an anion exchange membrane;

[0007] The outlet of the preparation tank is connected to the inlet of the cathode chamber through a pipeline, the outlet of the cathode chamber is connected to the inlet of the cleaning unit through a pipeline, and the outlet of the cleaning unit is connected to the inlet of the anode chamber through a pipeline.

[0008] The present invention adopts the above-mentioned technical scheme, which relates to a synergistic resource processing system for waste packaging barrels and waste salt, and the synergistic resource processing system includes a waste packaging barrel pretreatment subsystem and a waste salt electrochemical treatment subsystem; wherein, the waste packaging barrel pretreatment subsystem includes a cleaning unit for cleaning the iron material formed by the waste packaging barrel; and the alkaline cleaning liquid used for cleaning is obtained by electrolysis in the waste salt electrochemical treatment subsystem, and the chlorine gas electrolyzed in the waste salt electrochemical treatment subsystem can be used as an oxidant for the treatment of the cleaning waste liquid, degrade some organic pollutants, and reduce the difficulty of subsequent deep treatment.

[0009] Advantages and positive effects of the invention

[0010] 1. The coordinated treatment of waste packaging barrels and waste salt was achieved, realizing resource recycling.

[0011] 2. Using waste salt to generate alkaline cleaning solution online saves the cost of purchasing cleaning agents. At the same time, waste salt disposal fees and scrap iron sales fees can be charged, which has considerable economic benefits.

[0012] 3. Using alkaline cleaning agent, through the combined treatment of friction cleaning and ultrasonic cleaning, it can effectively remove the dirt attached to the surface of iron parts, and the product quality is good.

[0013] 4. Chlorine, a by-product of the waste salt electrochemical treatment subsystem, can be used as an oxidant for cleaning waste liquid treatment, degrading some organic pollutants and reducing the difficulty of subsequent deep treatment.

[0014] Preferably, the waste salt electrochemical treatment subsystem further comprises an anode tank, which is connected to a pipeline between the outlet of the cleaning unit and the inlet of the anode chamber and is used to store waste liquid containing organic matter and ammonia nitrogen discharged from the cleaning unit.

[0015] Preferably, the anode is a conductive metal or metal oxide, and the surface is coated with one or more catalytic materials selected from the group consisting of PbO2, RuO2, MnO2, IrO2, and SnO2.

[0016] Preferably, the waste salt electrochemical treatment subsystem further comprises a waste liquid tank, the inlet end of the waste liquid tank is connected to the outlet end of the anode chamber, and the waste liquid from the anode chamber is passed into the waste liquid tank for temporary storage for subsequent deep treatment.

[0017] Preferably, the waste salt electrochemical treatment subsystem further comprises a cleaning liquid storage tank connected to a pipeline between the cathode chamber outlet and the cleaning unit inlet. The cleaning liquid storage tank is used to store the alkaline cleaning agent obtained by electrolysis in the waste salt electrochemical treatment subsystem.

[0018] Preferably, the cleaning unit of the waste packaging barrel pretreatment subsystem specifically includes a friction cleaning unit and an ultrasonic cleaning unit, the outlet ends of the friction cleaning unit and the ultrasonic cleaning unit are connected to the inlet end of the anode chamber through a pipe, and the inlet ends of the friction cleaning unit and the ultrasonic cleaning unit are connected to the outlet end of the cathode chamber through a pipe. In this technical solution, the iron material obtained by the treatment of the waste packaging barrel needs to undergo two processes of friction cleaning and ultrasonic cleaning. The specific cleaning process is described in the following method. After the two cleaning processes, the iron sheet meets the product standards for scrap iron recycling and can be sold as scrap iron.

[0019] Preferably, the waste packaging barrel pretreatment subsystem further comprises

[0020] The residual liquid collection unit collects the residual liquid from the scrap iron packaging barrel and separates the remaining hazardous waste in the barrel;

[0021] Crushing unit, which crushes the scrap iron packaging barrels;

[0022] The magnetic separation unit separates the ferrous material and non-ferrous residue from the crushed material through magnetic separation.

[0023] A method for synergistic resource processing of waste packaging barrels and waste salt, characterized by comprising a waste packaging barrel pretreatment process and a waste salt electrochemical treatment process; the waste packaging barrel pretreatment process comprises the following steps:

[0024] Step 1: collect the residual liquid from the collected scrap iron packaging barrels to separate the remaining hazardous waste in the barrels;

[0025] Step 2: After the residual liquid is collected, the packaging barrel enters the crushing unit for crushing;

[0026] Step 3, the crushed material is separated into iron material and non-iron residue by magnetic separation;

[0027] Step 4, washing the iron material to meet the product standard for scrap iron recycling, the washing liquid in this step comes from the alkaline solution obtained by the waste salt electrochemical treatment process, and the waste liquid generated in this step is treated by the waste salt electrochemical treatment process;

[0028] The waste salt electrochemical treatment process comprises the following steps:

[0029] Step 1, preparing the waste salt into a solution with a Cl ion concentration of 100-1000 mg / L as an electrolyte;

[0030] Step 2, electrochemically treating the electrolyte and the waste liquid obtained in step 4 of the waste packaging barrel pretreatment process to prepare an alkaline solution and a chlorate oxidant;

[0031] In step 3, the alkaline solution is introduced into step 4 of the waste packaging barrel pretreatment process as a cleaning solution, and the waste liquid is temporarily stored after the chlorate oxidant degrades the organic matter and ammonia nitrogen in the waste liquid.

[0032] Preferably, step 1 of the waste salt electrochemical treatment process is: using waste salt whose main components are one or both of NaCl and KCl, and water to prepare a solution with a Cl ion concentration of 100~1000 mg / L as an electrolyte.

[0033] Preferably, the step 4 includes step 4.1, a friction cleaning process and step 4.2, an ultrasonic cleaning process;

[0034] Step 4.1, the friction cleaning process specifically involves soaking the iron material in a cleaning solution and rubbing it continuously to peel off the dirt attached to the iron sheet;

[0035] Step 4.2, the ultrasonic cleaning process is specifically to immerse the iron sheet in a cleaning solution and clean it by ultrasonic wave. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the structure of the collaborative resource processing system involved in the invention. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] In addition, 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, a feature defined as "first" or "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, unless otherwise clearly specified.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] Embodiment 1:

[0043] like Figure 1 A waste packaging barrel and waste salt collaborative resource processing system is shown, comprising a waste packaging barrel pretreatment subsystem and a waste salt electrochemical treatment subsystem.

[0044] The waste packaging barrel pretreatment subsystem comprises

[0045] The residual liquid collection unit 1 collects the residual liquid from the scrap iron packaging barrel and separates the remaining hazardous waste in the barrel.

[0046] Crushing unit 2 crushes the scrap iron packaging barrels.

[0047] The magnetic separation unit 3 separates the crushed material into ferrous material and non-ferrous residue by magnetic separation.

[0048] The cleaning unit comprises a cleaning unit for cleaning the iron material, wherein the cleaning unit specifically comprises a friction cleaning unit 4 and an ultrasonic cleaning unit 5.

[0049] The operation steps of the above-mentioned waste packaging barrel pretreatment subsystem are as follows: the collected scrap iron packaging barrels are first collected through residual liquid collection, and the remaining hazardous waste in the barrels is separated and disposed separately. After the residual liquid is collected, the packaging barrel enters the crushing unit 2, and the crushing equipment adopts a commercially available crusher, preferably a shear crusher. The crushed material enters the magnetic separation unit 3, and the ferrous material and non-ferrous residue are separated by the magnetic separator. The non-ferrous residue is collected and disposed separately. The ferrous material enters the friction cleaning unit 4. The friction cleaning unit 4 is preferably a tumbling cleaning machine, and the ferrous material is immersed in the cleaning liquid and continuously rubbed to peel off the dirt attached to the iron sheet. The cleaning liquid of the friction cleaning unit 4 comes from the waste salt electrochemical treatment system. After the iron sheet is treated by the friction cleaning unit 4, it enters the ultrasonic cleaning unit 5 for further cleaning. The cleaning liquid of the ultrasonic cleaning unit 5 comes from the waste salt electrochemical treatment system. After the cleaning liquid of the friction cleaning unit 4 and the ultrasonic cleaning unit 5 is used up, it enters the anode tank for temporary storage. The iron sheet after ultrasonic cleaning meets the product standard for scrap iron recycling and can be sold as scrap iron.

[0050] The waste salt electrochemical treatment subsystem includes an electrochemical reactor 6, an anode tank 7, a waste liquid tank 8, a cleaning liquid storage tank 9 and a preparation tank 10. The electrochemical reactor 6 includes a cathode chamber 61, an anode chamber 62, and a cathode 64 and an anode 65 respectively located in the cathode chamber 61 and the anode chamber 62 and connected to a power source 63. The cathode chamber 61 and the anode chamber 62 are separated by an anion exchange membrane 66; the anode 65 is preferably a conductive metal or metal oxide, and the surface is coated with one or more catalytic materials selected from PbO2, RuO2, MnO2, IrO2, and SnO2.

[0051] The preparation tank 10 is used to prepare an electrolyte whose main component is chloride salt. The outlet end of the preparation tank 10 is connected to the inlet end of the cathode chamber 61 through a pipeline. The outlet end of the cathode chamber 61 is connected to the inlet end of the cleaning unit through a pipeline. The cleaning liquid storage tank 9 is used to store the alkaline cleaning agent obtained by electrolysis in the waste salt electrochemical treatment subsystem. The cleaning liquid storage tank 9 is connected to the pipeline between the outlet end of the cathode chamber 61 and the inlet end of the cleaning unit. The outlet end of the cleaning unit is connected to the inlet end of the anode chamber 62 through a pipeline. The anode tank 7 is connected to the pipeline between the outlet end of the cleaning unit and the inlet end of the anode chamber 62, and is used to store the waste liquid containing organic matter and ammonia nitrogen discharged from the cleaning unit. The inlet end of the waste liquid tank 8 is connected to the outlet end of the anode chamber 62, and the waste liquid of the anode chamber 62 is passed into the waste liquid tank 8 for temporary storage for subsequent deep treatment.

[0052] As described above, the cleaning unit specifically includes a friction cleaning unit 4 and an ultrasonic cleaning unit 5. In this case, the outlet ends of the friction cleaning unit 4 and the ultrasonic cleaning unit 5 are connected to the inlet end of the anode chamber 62 through a pipeline, and the inlet ends of the friction cleaning unit 4 and the ultrasonic cleaning unit 5 are connected to the outlet end of the cathode chamber 61 through a pipeline. In this technical solution, the iron material obtained by the treatment of the waste packaging barrel needs to undergo two processes of friction cleaning and ultrasonic cleaning. The specific cleaning process is as described in Example 2. After the two processes of cleaning, the iron sheet meets the product standard for scrap iron recycling and can be sold as scrap iron.

[0053] The present invention adopts the above-mentioned technical solution, which relates to a synergistic resource processing system for waste packaging barrels and waste salt, and the synergistic resource processing system includes a waste packaging barrel pretreatment subsystem and a waste salt electrochemical treatment subsystem. Among them, the waste packaging barrel pretreatment subsystem includes a cleaning unit for cleaning the iron materials formed by the waste packaging barrel. The alkaline cleaning liquid used for cleaning is obtained by electrolysis in the waste salt electrochemical treatment subsystem, and the chlorine gas electrolyzed in the waste salt electrochemical treatment subsystem can be used as an oxidant for the treatment of the cleaning waste liquid, degrade some organic pollutants, and reduce the difficulty of subsequent deep treatment.

[0054] Advantages and positive effects of the invention

[0055] 1. The coordinated treatment of waste packaging barrels and waste salt was achieved, realizing resource recycling.

[0056] 2. Using waste salt to generate alkaline cleaning solution online saves the cost of purchasing cleaning agents. At the same time, waste salt disposal fees and scrap iron sales fees can be charged, which has considerable economic benefits.

[0057] 3. Using alkaline cleaning agent, through the combined treatment of friction cleaning and ultrasonic cleaning, it can effectively remove the dirt attached to the surface of iron parts, and the product quality is good.

[0058] 4. Chlorine, a by-product of the waste salt electrochemical treatment subsystem, can be used as an oxidant for cleaning waste liquid treatment, degrading some organic pollutants and reducing the difficulty of subsequent deep treatment.

[0059] Embodiment 2:

[0060] This embodiment is based on the waste packaging barrel and waste salt synergistic resource treatment system in Example 1, and provides a waste packaging barrel and waste salt synergistic resource treatment method, including a waste packaging barrel pretreatment process and a waste salt electrochemical treatment process. The waste packaging barrel pretreatment process includes the following steps:

[0061] Step 1: Collect the residual liquid in the collected scrap iron packaging barrels and separate the remaining hazardous waste in the barrels.

[0062] Step 2: After the residual liquid is collected, the packaging barrel enters the crushing unit 2 for crushing.

[0063] Step 3: The crushed materials are separated into ferrous materials and non-ferrous residues by magnetic separation.

[0064] Step 4, cleaning the iron material to meet the product standards for scrap iron recycling, the cleaning liquid in this step comes from the alkaline solution obtained by the waste salt electrochemical treatment process, and the waste liquid generated in this step is treated by the waste salt electrochemical treatment process.

[0065] The step 4 includes step 4.1, a friction cleaning process and step 4.2, an ultrasonic cleaning process.

[0066] Step 4.1, the friction cleaning process specifically involves soaking the iron material in a cleaning solution and rubbing it continuously to peel off the dirt attached to the iron sheet.

[0067] Step 4.2, the ultrasonic cleaning process is specifically to immerse the iron sheet in a cleaning solution and clean it by ultrasonic wave.

[0068] The waste salt electrochemical treatment process comprises the following steps:

[0069] Step 1: Prepare the waste salt into a solution with a Cl ion concentration of 100-1000 mg / L as the electrolyte. Step 1 specifically comprises: preparing the waste salt whose main components are one or both of NaCl and KCl and water into a solution with a Cl ion concentration of 100-1000 mg / L as the electrolyte.

[0070] Step 2, electrochemically treating the electrolyte and the waste liquid obtained in step 4 of the waste packaging barrel pretreatment process to obtain an alkaline solution and a chlorate oxidant.

[0071] In step 3, the alkaline solution is introduced into step 4 of the waste packaging barrel pretreatment process as a cleaning solution, and the waste liquid is temporarily stored after the chlorate oxidant degrades the organic matter and ammonia nitrogen in the waste liquid.

[0072] The implementation process and principle of the method are as follows: the waste salt is configured into a solution with a Cl ion concentration of 100-1000 mg / L, which is used as an electrolyte and passed into the cathode chamber 61 of the electrochemical reactor 6. The used cleaning liquid wastewater in the anode tank 7 is passed into the anode chamber 62. The positive pole of the power supply 63 is connected to the anode 65, and the negative pole of the power supply 63 is connected to the cathode 64. The output of the power supply 63 can be constant current, constant voltage or pulse mode, and the current density is 0.5-35A / dm2. After power is turned on, the cathode 64 undergoes a reduction reaction to generate hydrogen and hydroxide, thereby generating an alkaline solution, which enters the cleaning liquid storage tank 9 for use as a cleaning liquid. The chloride ions in the cathode chamber 61 migrate to the anode chamber 62 under the action of electromotive force and concentration difference, and an oxidation reaction occurs at the anode 65 to generate chlorine. The chlorine dissolves in water and reacts to generate a hypochlorite oxidant, which can degrade organic matter and ammonia nitrogen in the waste liquid of the anode 65.

[0073] Based on the above-mentioned system and method for the coordinated resource processing of waste packaging barrels and waste salt, the two sets of experimental records adopted are as follows:

[0074] Experimental group 1: Pretreatment of iron barrels containing waste oil. The electrolyte was prepared using waste salt mainly composed of sodium chloride obtained by evaporation and crystallization of waste water from incineration fly ash washing. The electrolyte concentration was 300 mg / L, and the waste salt indicators were shown in the following table. Stainless steel was used as cathode 64, TiO2 / RuO2 was used as anode 65, and electrolysis was performed at a current density of 5A / dm2. The cathode chamber 61 obtained an alkaline cleaning solution with a pH ≥ 13, which was used for friction cleaning and ultrasonic cleaning of iron parts. The COD concentration of the wastewater in the anode chamber 62 dropped from 3561 mg / L to 1915 mg / L, and the ammonia nitrogen concentration dropped from 314 mg / L to 91 mg / L. The quality of the recycled iron parts meets the relevant limit requirements in "Scrap Iron and Steel" GB4223-2004.

[0075] Table 1: Waste salt indicators of experimental group 1

[0076] project index% Sodium chloride content ≥ 93.3 Moisture ≤ 4.0 Water insoluble matter ≤ 0.2 Total amount of calcium and magnesium ions ≤ 0.7 Sulfate ion ≤ 1.0

[0077] Experimental Group 2: Pretreatment of iron barrels containing paint slag. The electrolyte was prepared by using the mixed waste salt of sodium chloride and potassium chloride obtained by evaporation and crystallization of the waste water from the incineration of fly ash. The electrolyte concentration was 400 mg / L, and the waste salt indicators were shown in the following table. Stainless steel was used as the cathode 64, TiO2 / RuO2 was used as the anode 65, and electrolysis was carried out at a current density of 5A / dm2. The cathode chamber 61 obtained an alkaline cleaning solution with a pH ≥ 13, which was used for friction cleaning and ultrasonic cleaning of iron parts. The COD concentration of the wastewater dropped from 3812 mg / L to 2038 mg / L, and the ammonia nitrogen concentration dropped from 532 mg / L to 116 mg / L. The quality of the recycled iron parts meets the relevant limit requirements in "Scrap Iron and Steel" GB4223-2004.

[0078] Table 2: Waste salt indicators of experimental group 2

[0079] project index% Potassium chloride and sodium chloride content ≥ 90.1 Moisture ≤ 4.0 Water insoluble matter ≤ 0.2 Total amount of calcium and magnesium ions ≤ 0.7 Sulfate ion ≤ 2.0

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0081] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A system for the coordinated resource processing of waste packaging barrels and waste salt, characterized in that: It includes a waste packaging barrel pretreatment subsystem and a waste salt electrochemical treatment system; the waste packaging barrel pretreatment subsystem includes a cleaning unit for cleaning iron materials; The waste salt electrochemical treatment system comprises an electrochemical reactor (6) and a preparation tank (10) for preparing an electrolyte whose main component is chloride salt; the electrochemical reactor (6) comprises a cathode chamber (61), an anode chamber (62), and a cathode (64) and an anode (65) respectively located in the cathode chamber (61) and the anode chamber (62) and connected to a power source (63); the cathode chamber (61) and the anode chamber (62) are separated by an anion exchange membrane (66); The outlet end of the preparation tank (10) is connected to the inlet end of the cathode chamber (61) via a pipeline, the outlet end of the cathode chamber (61) is connected to the inlet end of the cleaning unit via a pipeline, and the outlet end of the cleaning unit is connected to the inlet end of the anode chamber (62) via a pipeline; The waste salt electrochemical treatment system further comprises an anode tank (7), which is connected to a pipeline between the outlet end of the cleaning unit and the inlet end of the anode chamber (62) and is used to store waste liquid containing organic matter and ammonia nitrogen discharged from the cleaning unit; The waste salt electrochemical treatment system further comprises a cleaning liquid storage tank (9), wherein the cleaning liquid storage tank (9) is connected to a pipeline between the outlet end of the cathode chamber (61) and the inlet end of the cleaning unit; The cleaning unit of the waste packaging barrel pretreatment subsystem specifically comprises a friction cleaning unit (4) and an ultrasonic cleaning unit (5), wherein the outlet ends of the friction cleaning unit (4) and the ultrasonic cleaning unit (5) are connected to the inlet end of the anode chamber (62) via a pipeline, and the inlet ends of the friction cleaning unit (4) and the ultrasonic cleaning unit (5) are connected to the outlet end of the cathode chamber (61) via a pipeline.

2. The system for co-resource processing of waste packaging barrels and waste salt according to claim 1 is characterized by: The anode (65) is a conductive metal or metal oxide, and the surface is coated with one or more catalytic materials selected from the group consisting of PbO2, RuO2, MnO2, IrO2 and SnO2.

3. The system for co-resource processing of waste packaging barrels and waste salt according to claim 1 is characterized in that: The waste salt electrochemical treatment system further comprises a waste liquid tank (8), wherein the inlet end of the waste liquid tank (8) is connected to the outlet end of the anode chamber (62).

4. The system for co-resource processing of waste packaging barrels and waste salt according to claim 1 is characterized in that: The waste packaging barrel pretreatment subsystem further comprises: A residual liquid collection unit (1) collects residual liquid from the scrap iron packaging barrel and separates the remaining hazardous waste in the barrel; A crushing unit (2) is used to crush the scrap iron packaging barrels; The magnetic separation unit (3) separates the ferrous material and the non-ferrous residue from the crushed material by magnetic separation.

5. A method for the coordinated resource treatment of waste packaging barrels and waste salt, characterized in that: The method adopts the system according to any one of claims 1 to 4, including a waste packaging barrel pretreatment process and a waste salt electrochemical treatment process; the waste packaging barrel pretreatment process comprises the following steps: Step 1: collect the residual liquid from the collected scrap iron packaging barrels to separate the remaining hazardous waste in the barrels; Step 2, after the residual liquid is collected, the packaging barrel enters the crushing unit (2) for crushing; Step 3, the crushed material is separated into iron material and non-iron residue by magnetic separation; Step 4, washing the iron material to meet the product standard for scrap iron recycling, the washing liquid in this step comes from the alkaline solution obtained by the waste salt electrochemical treatment process, and the waste liquid generated in this step is treated by the waste salt electrochemical treatment process; The waste salt electrochemical treatment process comprises the following steps: Step 1, preparing the waste salt into a solution with a Cl ion concentration of 100-1000 mg / L as an electrolyte; Step 2, electrochemically treating the electrolyte and the waste liquid obtained in step 4 of the waste packaging barrel pretreatment process to prepare an alkaline solution and a chlorate oxidant; In step 3, the alkaline solution is introduced into step 4 of the waste packaging barrel pretreatment process as a cleaning solution, and the waste liquid is temporarily stored after the chlorate oxidant degrades the organic matter and ammonia nitrogen in the waste liquid.

6. The method for synergistic resource treatment of waste packaging barrels and waste salt according to claim 5, characterized in that: Step 1 of the waste salt electrochemical treatment process is specifically: using waste salt whose main components are one or both of NaCl and KCl, and water to prepare a solution with a Cl ion concentration of 100~1000 mg / L as an electrolyte.

7. The method for synergistic resource treatment of waste packaging barrels and waste salt according to claim 5, characterized in that: The step 4 includes step 4.1, a friction cleaning process and step 4.2, an ultrasonic cleaning process; Step 4.1, the friction cleaning process specifically involves soaking the iron material in a cleaning solution and rubbing it continuously to peel off the dirt attached to the iron sheet; Step 4.2, the ultrasonic cleaning process is specifically to immerse the iron sheet in a cleaning solution and clean it by ultrasonic wave.

Images