Integrated treatment device for landfill leachate concentrate by membrane filtration

Abstract

The invention relates to an integrated treatment device for landfill leachate membrane filtration concentrate, which is composed of a plasma generating section of dielectric barrier discharge located in the upper section of the device and a coordinated ozone pollutant reaction section located in the lower section of the device. A hydrogen inlet is arranged in the upper section of the device, an insulating partition is inserted between the upper section and the lower section, and a plasma hydrogen inlet conduit is arranged. An exhaust port, a water sample outlet, an inlet, and ozone and oxygen inlets are arranged in the lower section of the device. Circulating water for cooling and grounding is injected between the inner cylinder and the outer cylinder of the reactor. The discharge electrode is inserted into the inner cylinder of the reactor. A microporous aeration head is arranged at the bottom of the inner cylinder of the reactor. The landfill membrane filtration concentrate enters the inner cylinder, and the ozone and oxygen mixed gas enters the inner cylinder through microbubble aeration. Plasma hydrogen is generated by dielectric barrier discharge and passed below the liquid surface of the landfill membrane filtration concentrate, and reacts with oxygen to generate hydrogen peroxide in situ, thereby realizing enhanced oxidation treatment of organic matter and improving degradation capacity.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental engineering and relates to a device for treating landfill leachate, and in particular to a plasma-coordinated ozone integrated treatment device for membrane filtration concentrate of landfill leachate. Background Art

[0002] At present, the annual volume of domestic waste in my country has reached 200-300 million tons, of which more than 100 million tons are disposed of by incineration. During the garbage dumping process, a waste treatment byproduct, leachate, which is harmful to the environment, will be produced. In order to reduce the potential risk of the discharge of garbage leachate to the overall environment, my country requires the construction of mutually supporting in-situ leachate treatment equipment in incineration plants or landfill areas to ensure that the leachate discharge meets the "Pollution Control Standard for Domestic Waste Incineration" (GB18485-2014) and the "Pollutant Control Standard for Domestic Waste Landfill" (GB16889-2008). Since the leachate contains a high level of difficult-to-biodegrade pollutants, it is difficult to meet the corresponding pollution control requirements using conventional biochemical and chemical treatment technologies. In this context, membrane treatment, as a physical treatment technology with low operating costs, has begun to be widely used.

[0003] However, membrane treatment will produce a concentrate equivalent to 20%-30% of the volume of the leachate. The membrane filtration concentrate is enriched with various pollutants in the leachate before membrane filtration, and its humus and salt content are very high, making further treatment difficult. At present, the membrane filtration concentrate in landfills is mostly treated by evaporation and concentration, and the membrane filtration concentrate in incineration plants is mostly sprayed back into the incinerator. The treatment cost is very high. According to industry estimates, it takes at least 600 degrees of electricity to treat each ton of membrane filtration concentrate. Therefore, how to reduce the cost of membrane filtration concentrate of landfill leachate has become a hot issue in the industry. Advanced oxidation process, as a technology that can improve the biodegradability of difficult-to-degrade wastewater and create conditions for the concentrate to flow back to the front-end biochemical system after treatment, has begun to attract attention.

[0004] Ozone oxidation technology has a strong oxidizing ability, which not only has a good effect on organic and inorganic substances, but also has the effects of deodorization, disinfection, and sterilization. As a green and friendly technology, it has been applied to a certain extent in leachate treatment. Patent document CN206570116U discloses a multi-stage ozone catalytic oxidation treatment device for deep treatment, which improves the utilization efficiency of ozone by catalyzing ozone with a catalyst, and further improves the degradation effect. Patent document CN201910554317.2 discloses a method for treating leachate with calcium peroxide and ozone to improve the utilization efficiency of ozone. However, all of the above methods require the introduction of new agents, and at the same time, during the ozone reaction process, 85%-90% of oxygen is mixed into the reaction device together, which means that the ozone system has a large amount of oxygen consumption problem, which still cannot be solved.

[0005] Therefore, it is particularly important to construct a synergistic ozone integrated device in the field of landfill leachate treatment, which focuses on simultaneously improving the utilization rates of oxygen and ozone. Summary of the invention

[0006] In order to solve the problems of oxygen consumption and low ozone utilization rate in existing ozone technology, the present invention provides a plasma-coordinated ozone integrated treatment device for landfill leachate membrane filtration concentrate. The basic principle is that after ozone enters from the bottom of the reactor, it quickly contacts with organic matter, directly or indirectly oxidizes organic matter to achieve primary utilization of ozone; the remaining large amount of oxygen combines with active hydrogen in the plasma device at the upper part of the reactor to produce hydrogen peroxide in situ, and reacts with ozone to produce hydroxyl radicals, thereby achieving secondary utilization of ozone. The treatment device simultaneously and efficiently improves the utilization rate of oxygen and ozone and the degradation capacity of organic matter, achieving a relatively ideal treatment effect.

[0007] The technical solution of the present invention is as follows:

[0008] An integrated treatment device for landfill leachate membrane filtration concentrate, which is composed of a dielectric barrier discharge plasma generation section located at the upper section of the device and a coordinated ozone pollutant reaction section located at the lower section of the device, including a reactor inner tube, a reactor outer tube, a discharge electrode, a metal current lead-out wire and a microporous aeration head;

[0009] The reactor inner cylinder is the main body of the entire reactor, which is a vertical cylindrical member with a sealed bottom end, and an insulating cover is arranged at the upper end opening thereof. A hydrogen inlet is arranged on the side wall of the reactor inner cylinder of the upper section of the device that is higher than the reactor outer cylinder; a horizontal insulating partition is inserted between the upper section of the device and the lower section of the device, and a plasma hydrogen inlet conduit is arranged at the center of the partition; an exhaust port and a water sample outlet are arranged on the upper end side wall of the lower section of the device, a water sample inlet is arranged on the lower end side wall of the lower section of the device, and ozone and oxygen inlets are arranged at the bottom end of the lower section of the device;

[0010] The reactor outer cylinder is located in the upper section of the device, and circulating water for cooling and grounding is injected from bottom to top into the area between the reactor inner cylinder and the reactor outer cylinder;

[0011] The discharge electrode is inserted into the inner cylinder of the reactor from the center of the insulating cover, and the portion of the discharge electrode extending upward from the insulating cover is connected to the high voltage of the AC step-up transformer;

[0012] The metal current lead-out line is arranged in a region between the reactor inner cylinder and the reactor outer cylinder, and the part of the lead-out line contacts the circulating water, and the other end of the metal current lead-out line is connected to the ground wire outside the reactor outer cylinder;

[0013] The microporous aeration head is arranged at the bottom of the inner cylinder of the reactor, and the microporous aeration head is connected to an external ozone generator through an ozone inlet pipe.

[0014] The height-to-diameter ratio of the reactor inner tube is between 8-50, the ratio of the upper and lower sections of the reactor inner tube is between 1 / 8-1 / 2, and the diameter ratio of the reactor inner tube to the reactor outer tube is between 1 / 2-1 / 5.

[0015] The discharge electrode is a metal wire, and the ratio of its diameter to the diameter of the reactor inner tube is between 1 / 30 and 1 / 15; the material of the discharge electrode is copper, tungsten, nickel-titanium stainless steel or an alloy with trace amounts of rare element oxides added, and the rare elements include scandium, yttrium, and lanthanide elements.

[0016] The ratio of the diameter of the metal current lead-out wire to the diameter of the discharge electrode is between 1-10; the material of the metal current lead-out wire is copper, tungsten, nickel-titanium stainless steel or an alloy with trace amounts of rare element oxides added, and the rare elements include scandium, yttrium, and lanthanide elements.

[0017] The microporous aeration head is an umbrella-shaped or flat-plate aeration head, the aperture of the microporous aeration head is 0.22-0.45 μm, and the size of the generated microbubbles is less than 50 μm; the material of the microporous aeration head is titanium.

[0018] The position of the plasma hydrogen inlet conduit is located between 1 / 4 and 1 / 3 of the upper end of the lower section of the reactor inner tube, and the lower end of the plasma hydrogen inlet conduit is below the liquid level of the membrane filtration concentrated liquid.

[0019] The hydrogen inlet is provided with an inlet pipe, and the volume concentration of hydrogen inputted by the inlet pipe is less than 4.1%.

[0020] The exhaust port is provided with an exhaust pipe, the exhaust pipe is located below the horizontal insulating partition, and the exhaust pipe is made of insulating material.

[0021] The side wall of the reactor outer cylinder is provided with a condensed water inlet and a condensed water outlet.

[0022] A sealing material is provided at the connection between the insulating cover and the upper end of the reactor inner tube.

[0023] The present invention is mainly to solve the problem that a large amount of oxygen enters the reaction device during the process of generating ozone by the ozone generator, but the oxygen is not fully utilized. To solve this problem, the treatment device of the present invention adopts two sections, a plasma generator and a pollutant reaction device. A large amount of oxygen reacts with active hydrogen in the plasma generator section to generate oxygen-active substance hydrogen peroxide. Hydrogen peroxide can further catalyze ozone to generate hydroxyl free radicals with strong oxidizing properties, thereby achieving simultaneous improvement of oxygen and ozone utilization rates and realizing efficient degradation of pollutants by the treatment system.

[0024] The plasma-coordinated ozone integrated treatment device for the landfill leachate membrane filtration concentrate of the present invention is composed of a plasma generating section of dielectric barrier discharge located in the upper section and an ozone pollutant reaction section located in the lower section, including components such as a reactor inner cylinder, a reactor outer cylinder, a discharge electrode, a metal current lead-out line, and a microbubble aeration head. The landfill membrane filtration concentrate enters the lower section inner cylinder of the reactor through the bottom side wall, and the ozone and oxygen mixed gas enters the lower section inner cylinder of the reactor from the bottom through microbubble aeration. Plasma hydrogen is generated by the dielectric barrier discharge of the upper section of the reactor and passed below the liquid surface of the landfill membrane filtration concentrate, and reacts with oxygen to generate hydrogen peroxide in situ, thereby realizing enhanced oxidation treatment of organic matter. The present invention improves the utilization efficiency of ozone and its residual oxygen, and the hydrogen peroxide generated in situ strengthens ozone, increases OH production, and effectively improves the degradation capacity of difficult-to-degrade organic matter in the landfill membrane filtration concentrate, and is an environmental protection technology with good development prospects.

[0025] Compared with the prior art, the present invention has achieved the following beneficial effects: the original unused oxygen is utilized in a plasma manner, so that the oxygen utilization rate and ozone utilization rate are increased by more than 20%, the removal rate of landfill leachate membrane filtration concentrate is increased by more than 25% compared with the single ozone treatment system, and the humus-like substances have a higher removal effect; at the same time, the reaction treatment device has the characteristics of small footprint and high operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an integrated treatment device for landfill leachate membrane filtration concentrate of the present invention.

[0027] Reference numerals:

[0028] 1 is the ozone and oxygen inlet, 2 is the microporous aeration head, 3 is the hydrogen inlet, 4 is the exhaust port, 5 is the reactor outer cylinder, 6 is the inner cylinder medium or the discharge medium, 7 is the reactor inner cylinder, 8 is the condensate inlet, 9 is the condensate outlet, 10 is the insulating cover, 11 is the discharge electrode, 12 is the sealing material, 13 is the metal current lead-out wire, 14 is the plasma hydrogen inlet conduit, 15 is the wastewater inlet, 16 is the wastewater outlet, 17 is the membrane filtration concentrate, and 18 is the horizontal insulating partition. DETAILED DESCRIPTION

[0029] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0030] See also Figure 1 The present invention provides a plasma-coordinated ozone integrated treatment device for landfill leachate membrane filtration concentrate, which is composed of a dielectric barrier discharge plasma generating section located in the upper section of the device and a coordinated ozone pollutant reaction section located in the lower section of the device, and is equipped with a reactor inner tube 7, a reactor outer tube 5, a discharge electrode 11, a metal current lead-out line 13 and a microporous aeration head 2 and other components.

[0031] The reactor inner tube 7 is the main body of the entire reactor, which is a vertical cylindrical member with a sealed bottom end, and an insulating cover 10 is set at the upper end opening. A sealing material 12 is set at the connection between the insulating cover 10 and the upper end of the reactor inner tube 7. A hydrogen inlet 3 is set on the side wall of the reactor inner tube 7 at the upper section of the device, which is higher than the reactor outer tube 5. The hydrogen inlet 3 is provided with an inlet pipe, and the volume concentration of hydrogen input by the inlet pipe is less than 4.1%. The ratio of hydrogen and ozone / oxygen is limited within the explosion limit of hydrogen.

[0032] A horizontal insulating partition 18 is inserted between the upper section and the lower section of the device, and a plasma hydrogen inlet conduit 14 is arranged at the center of the partition. The position of the plasma hydrogen inlet conduit 14 is located between the upper 1 / 4 and 1 / 3 of the lower section of the reactor inner tube 7, and the lower end of the plasma hydrogen inlet conduit 14 is below the liquid level of the membrane filtration concentrate 17.

[0033] An exhaust port 4 and a water sample outlet are provided on the upper side wall of the lower section of the device. An exhaust pipe is provided at the exhaust port 4, and the exhaust pipe is located below the horizontal insulating partition 18. The exhaust pipe is made of insulating material. A water sample inlet is provided on the lower side wall of the lower section of the device. The water sample inlet has a wastewater inlet 15, and the water sample outlet has a wastewater outlet 16. An ozone and oxygen inlet 1 is provided at the bottom of the lower section of the device.

[0034] The reactor outer tube 5 is located in the upper section of the device, and circulating water for cooling and grounding is injected from bottom to top in the area between the reactor inner tube 7 and the reactor outer tube 5. The side wall of the reactor outer tube 5 is provided with a condensed water inlet 8 and a condensed water outlet 9. The inner tube medium or the discharge medium 6 can be provided in the reactor inner tube 7. The height-to-diameter ratio of the reactor inner tube 7 is between 8-50. The ratio of the upper and lower sections of the reactor inner tube 7 is between 1 / 8-1 / 2. The diameter ratio of the reactor inner tube 7 to the reactor outer tube 5 is between 1 / 2-1 / 5.

[0035] The discharge electrode 11 is inserted into the reactor inner tube 7 from the center of the insulating cover 10. The portion of the discharge electrode 11 extending upward from the insulating cover 10 is connected to the high voltage of the AC step-up transformer. The discharge electrode 11 is a metal wire, and the ratio of its diameter to the diameter of the reactor inner tube 7 is between 1 / 30 and 1 / 15. The material of the discharge electrode 11 is copper, tungsten, nickel-titanium stainless steel, or an alloy with trace amounts of rare element oxides added, and the rare elements include scandium, yttrium, and lanthanide elements.

[0036] The metal current lead-out wire 13 is arranged in a part of the lead-out wire in the area between the reactor inner tube 7 and the reactor outer tube 5, and is in contact with the circulating water. The other end of the metal current lead-out wire 13 is connected to the ground wire outside the reactor outer tube 5. The ratio of the diameter of the metal current lead-out wire 13 to the diameter of the discharge electrode 11 is between 1 and 10. The material of the metal current lead-out wire 13 is copper, tungsten, nickel-titanium stainless steel or an alloy with trace amounts of rare element oxides added, and the rare elements include scandium, yttrium, and lanthanide elements.

[0037] The microporous aeration head 2 is arranged at the bottom of the reactor inner tube 7, and the microporous aeration head 2 is connected to the external ozone generator through the ozone inlet pipe. The microporous aeration head 2 is an umbrella-shaped or flat aeration head, and the aperture of the microporous aeration head 2 is 0.22-0.45 μm, and the size of the generated microbubbles is less than 50 μm. The material of the microporous aeration head 2 is titanium.

[0038] The material of the reactor inner tube 7 and the reactor outer tube 5 is quartz, glass, ceramic, corundum or one or more mixed insulating materials. The material of the plasma hydrogen inlet conduit 14 is silica gel, polyvinyl chloride, polytetrafluoroethylene or perfluoroalkoxy resin.

[0039] The plasma-coordinated ozone integrated treatment device for landfill leachate membrane filtration concentrate of the present invention adopts the following installation method and working process in practical application:

[0040] like Figure 1 As shown, the reactor inner cylinder 7 is the main body of the entire reactor, which is a vertical cylindrical member with a sealed bottom end. The upper opening is sealed with an insulating cover 10 and a sealing material 12. A hydrogen inlet 3 is arranged on the side wall of the upper inner cylinder of the device that is higher than the outer cylinder. A horizontal insulating partition 18 is inserted between the upper and lower sections of the device, and a plasma hydrogen inlet conduit 14 is arranged at the center of the partition. An exhaust port 4 and a wastewater outlet 16 are arranged at the upper end of the lower section of the device, a wastewater inlet 15 is arranged at the lower end, and an ozone and oxygen inlet 1 is arranged at the bottom. The reactor outer cylinder 5 is located in the upper section of the device. Circulating water used as cooling and grounding electrodes is injected from bottom to top between the inner and outer cylinders of the reactor.

[0041] The discharge electrode 11 is a metal wire, which is inserted into the reactor inner tube 7 from the center of the insulating cover 10, and the part extending out of the insulating cover 10 is connected to the high voltage of the AC step-up transformer. One end of the metal current lead wire 13 is in contact with the circulating water between the inner and outer tubes of the reactor, and the other end is connected to the ground wire outside the reactor outer tube 5. The microporous aeration head 2 is arranged at the bottom of the reactor inner tube 7, and is connected to the external ozone generator through the ozone inlet pipe of the ozone and oxygen inlet 1.

[0042] During operation, the landfill leachate membrane filtration concentrate 17 enters the reactor inner tube 7 at the lower section of the device through the wastewater inlet 15 located on the side wall of the bottom end of the device through the pump, and the ozone and oxygen mixed gas generated by the ozone generator forms microbubbles through the microporous aeration head 2, and enters the interior of the reactor inner tube 7 at the lower section of the device through the ozone and oxygen inlet 1 conduit at the bottom of the device. Plasma hydrogen is generated by dielectric barrier discharge in the upper section of the reactor, and is passed through the plasma hydrogen inlet conduit 14 to the liquid surface of the landfill leachate membrane filtration concentrate 17, and reacts with oxygen to generate hydrogen peroxide in situ. The microbubble ozone and the in-situ generated hydrogen peroxide strengthen the ozone to contact and react with the landfill leachate membrane filtration concentrate in stages, making full use of the remaining oxygen and improving the conversion efficiency of ozone, and generating more active free radicals. The landfill leachate membrane filtration concentrate treated is the leachate biochemically treated concentrate retained by nanofiltration, reverse osmosis and other membranes, and the COD is 3000-20000 mg / L.

[0043] The following is an example of the plasma-coordinated ozone integrated treatment device for landfill leachate membrane filtration concentrate in a specific treatment operation.

[0044] Embodiment 1:

[0045] The treatment object is the nanofiltration membrane liquid of the domestic waste landfill leachate (COD is 3000mg / L), using the following method: Figure 1 The process device shown in the figure is used for treatment, and the main process parameters are as follows: the treated water volume is 3L, the inner and outer tubes of the reactor are made of quartz glass, the height-to-diameter ratio of the inner sleeve is 8, the ratio of the upper and lower sections of the inner tube is 1 / 3, and the diameter ratio of the inner and outer tubes is 1 / 2. The materials of the discharge electrode and the metal current lead wire are copper wire, with diameters of 0.5cm and 2cm respectively, and the discharge power is 10W. The umbrella-shaped aeration head made of titanium is used, with an aperture of 0.22-0.45μm. The hydrogen volume concentration is 2%, the ozone concentration is 80mg / L, the flow rate is 1L / min, the reaction treatment is 120min, the oxygen utilization rate is increased by 21.5%, the ozone utilization rate is increased by 20.3%, and the final COD removal rate can reach 78.8%.

[0046] Embodiment 2:

[0047] The treatment object is the nanofiltration membrane liquid of the domestic waste landfill leachate (COD is 10000mg / L), using the following method: Figure 1The process device shown in the figure is used for treatment, and the main process parameters are as follows: the treated water volume is 3L, the inner and outer tubes of the reactor are made of quartz glass, the height-to-diameter ratio of the inner sleeve is 20, the ratio of the upper and lower sections of the inner tube is 1 / 4, and the diameter ratio of the inner and outer tubes is 1 / 2. The materials of the discharge electrode and the metal current lead wire are copper wire, with diameters of 0.5cm and 2cm respectively, and the discharge power is 10W. The umbrella-shaped aeration head made of titanium is used, with an aperture of 0.22-0.45μm. The hydrogen volume concentration is 2%, the ozone concentration is 80mg / L, the flow rate is 1L / min, the reaction treatment is 120min, the oxygen utilization rate is increased by 19.8%, the ozone utilization rate is increased by 18.2%, and the final COD removal rate can reach 75.4%.

[0048] Embodiment 3:

[0049] The treatment object is the nanofiltration membrane liquid of the domestic waste landfill leachate (COD is 20000mg / L), using the following method: Figure 1 The process device shown in the figure is used for treatment, and the main process parameters are as follows: the treated water volume is 3L, the inner and outer tubes of the reactor are made of quartz glass, the height-to-diameter ratio of the inner sleeve is 50, the ratio of the upper and lower sections of the inner tube is 1 / 4, and the diameter ratio of the inner and outer tubes is 1 / 2. The materials of the discharge electrode and the metal current lead wire are copper wire, with diameters of 0.5cm and 2cm respectively, and the discharge power is 10W. The umbrella-shaped aeration head made of titanium is used, with an aperture of 0.22-0.45μm. The hydrogen volume concentration is 2%, the ozone concentration is 80mg / L, the flow rate is 1L / min, the reaction treatment is 120min, the oxygen utilization rate is increased by 18.8%, the ozone utilization rate is increased by 16.4%, and the final COD removal rate can reach 65.8%.

[0050] In summary, the integrated treatment device for landfill leachate membrane filtration concentrate of the present invention adopts two sections, namely a plasma generator and a pollutant reaction device. A large amount of oxygen reacts with active hydrogen in the plasma generator section to generate oxygen-active substance hydrogen peroxide. Hydrogen peroxide can further catalyze ozone to generate hydroxyl free radicals with strong oxidizing performance, thereby achieving simultaneous improvement in oxygen and ozone utilization rates, effectively improving the degradation capacity of difficult-to-degrade organic matter in the landfill membrane filtration concentrate, and having the characteristics of small footprint and high operating efficiency.

[0051] Of course, those skilled in the art should realize that the above embodiments are only used to illustrate the present invention, and are not used to limit the present invention. As long as they are within the spirit of the present invention, changes and modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. An integrated treatment device for landfill leachate membrane filtration concentrate, characterized in that: It consists of a dielectric barrier discharge plasma generating section located at the upper section of the device and a coordinated ozone pollutant reaction section located at the lower section of the device, including a reactor inner tube (7), a reactor outer tube (5), a discharge electrode (11), a metal current lead-out wire (13) and a microporous aeration head (2); The reactor inner cylinder (7) is the main body of the entire reactor and is a vertical cylindrical member with a sealed bottom end. An insulating cover (10) is provided at the upper opening of the reactor inner cylinder (7). A hydrogen inlet (3) is provided on the side wall of the upper section of the device where the reactor inner cylinder (7) is higher than the reactor outer cylinder (5). A horizontal insulating partition (18) is inserted between the upper section and the lower section of the device, and a plasma hydrogen inlet conduit (14) is provided at the center of the partition. An exhaust port (4) and a water sample outlet are provided on the upper side wall of the lower section of the device, a water sample inlet is provided on the lower side wall of the lower section of the device, and an ozone and oxygen inlet (1) is provided at the bottom of the lower section of the device. The reactor outer cylinder (5) is located in the upper part of the device, and circulating water for cooling and grounding is injected from bottom to top into the area between the reactor inner cylinder (7) and the reactor outer cylinder (5); The discharge electrode (11) is inserted into the reactor inner tube (7) from the center of the insulating cover (10), and the portion of the discharge electrode (11) extending upward from the insulating cover (10) is connected to the high voltage of the AC step-up transformer; The metal current lead-out line (13) is arranged in a region between the reactor inner cylinder (7) and the reactor outer cylinder (5), and a portion of the lead-out line is in contact with the circulating water, and the other end of the metal current lead-out line (13) is connected to a ground wire outside the reactor outer cylinder (5); The microporous aeration head (2) is arranged at the bottom of the reactor inner tube (7), and the microporous aeration head (2) is connected to an external ozone generator via an ozone inlet pipe.

2. The integrated treatment device for landfill leachate concentrate according to claim 1, characterized in that: The height-to-diameter ratio of the reactor inner tube (7) is between 8 and 50, the ratio of the upper and lower sections of the reactor inner tube (7) is between 1 / 8 and 1 / 2, and the diameter ratio of the reactor inner tube (7) to the reactor outer tube (5) is between 1 / 2 and 1 / 5.

3. The integrated treatment device for landfill leachate membrane filtration concentrate according to claim 1, characterized in that: The discharge electrode (11) is a metal wire, the ratio of its diameter to the diameter of the reactor inner tube (7) is between 1 / 30 and 1 / 15; the material of the discharge electrode (11) is copper, tungsten, nickel-titanium stainless steel, or an alloy with trace amounts of rare element oxides added, the rare elements comprising scandium, yttrium, and lanthanide elements.

4. The integrated treatment device for landfill leachate membrane filtration concentrate according to claim 1, characterized in that: The ratio of the diameter of the metal current lead-out wire (13) to the diameter of the discharge electrode (11) is between 1 and 10; the material of the metal current lead-out wire (13) is copper, tungsten, nickel-titanium stainless steel, or an alloy with trace amounts of rare element oxides added, wherein the rare elements include scandium, yttrium, and lanthanide elements.

5. The integrated treatment device for landfill leachate membrane filtration concentrate according to claim 1, characterized in that: The microporous aeration head (2) is an umbrella-shaped or flat-plate aeration head, the pore size of the microporous aeration head (2) is 0.22-0.45 μm, and the size of the generated microbubbles is less than 50 μm; the material of the microporous aeration head (2) is titanium.

6. The integrated treatment device for landfill leachate membrane filtration concentrate according to claim 1, characterized in that: The plasma hydrogen inlet conduit (14) is located between 1 / 4 and 1 / 3 of the upper end of the lower section of the reactor inner tube (7), and the lower end of the plasma hydrogen inlet conduit (14) is below the liquid level of the membrane filtration concentrated liquid (17).

7. The integrated treatment device for landfill leachate membrane filtration concentrate according to claim 1, characterized in that: The hydrogen inlet (3) is provided with an inlet pipe, and the volume concentration of hydrogen input through the inlet pipe is less than 4.1%.

8. The integrated treatment device for landfill leachate concentrate according to claim 1, characterized in that: The exhaust port (4) is provided with an exhaust pipe, the exhaust pipe is located below the horizontal insulating partition (18), and the exhaust pipe is made of insulating material.

9. The integrated treatment device for landfill leachate concentrate according to claim 1, characterized in that: The side wall of the reactor outer cylinder (5) is provided with a condensed water inlet (8) and a condensed water outlet (9).

10. The integrated treatment device for landfill leachate concentrate according to claim 1, characterized in that: A sealing material (12) is provided at the connection between the insulating cover (10) and the upper end of the reactor inner tube (7).

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