CN213506147U

CN213506147U - Landfill leachate's processing system

Info

Publication number: CN213506147U
Application number: CN201922325719.3U
Authority: CN
Inventors: 张志炳; 周政; 张锋; 李磊; 孟为民; 王宝荣; 杨高东; 罗华勋; 杨国强; 田洪舟; 曹宇
Original assignee: Nanjing Institute of Microinterface Technology Co Ltd
Current assignee: Nanjing Institute of Microinterface Technology Co Ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2021-06-22
Anticipated expiration: 2029-12-23

Abstract

The utility model provides a landfill leachate's processing system. The processing system comprises: the system comprises a raw water tank, a waste water heat exchanger, a waste water heater and an oxidation reactor which are connected in sequence, wherein the waste water heat exchanger is provided with a material inlet, a material outlet, a heat source inlet and a heat source outlet; the oxidized water from the oxidation reactor enters the wastewater heat exchanger from the heat source inlet, the heat source outlet is connected with a finished product tank, the finished product tank is connected with membrane filtration equipment to realize the concentration treatment of the landfill leachate, the material inlet is connected with the raw water tank, and the material outlet is connected with the wastewater heater; and a micro-interface generating system for dispersing the broken gas into bubbles is arranged outside the oxidation reactor. The utility model discloses a processing system improves the contact at reaction phase interface through laying little interface emergence system after, need not use the catalyst also to obtain good waste water treatment effect.

Description

Landfill leachate's processing system

Technical Field

The utility model relates to a landfill leachate handles the field, particularly, relates to a landfill leachate's processing system.

Background

Along with the rapid development of economy and the great improvement of the living standard of people, the garbage generated along with the rapid development is multiplied. The solid garbage in China is treated by adopting a landfill or incineration method. The liquid containing organic or inorganic components produced by the physical, biological and chemical actions of compaction, fermentation and the like in the landfill process and under the seepage action of precipitation and other external water is called as landfill leachate. Landfill leachate generally has the characteristics of large water quality change (unstable water quality), complex water quality (containing various heavy metal ions and ammonia nitrogen), high organic concentration, poor biodegradability and the like, and can easily cause serious pollution to surrounding soil layers and underground water. Therefore, the effective collection and treatment of landfill leachate have attracted much attention and need to be solved, and the treatment technology of landfill leachate has become a research hotspot internationally.

At present, the treatment method of the landfill leachate at home and abroad mainly comprises a physicochemical method, ozone or hydrogen peroxide oxidation, photochemical catalytic oxidation, a membrane separation method, a biological method and the like. The physicochemical method has high operation cost, complex treatment process, easy generation of secondary pollution, difficult standard discharge and unsuitability for treatment of a large amount of landfill leachate; the single ozone or hydrogen peroxide oxidation and photochemical catalytic oxidation methods have high treatment cost and are difficult to discharge the wastewater up to the standard; the membrane separation method can lead the wastewater to reach the standard and be discharged, but has the problem that the concentrated solution can not be treated; although the biological method is energy-saving and efficient, can simultaneously remove organic matters and ammonia nitrogen in the landfill leachate, can not treat the landfill leachate with high concentration of organic matters and high salt content, and is difficult to reach the discharge standard.

Catalytic Wet Oxidation (CWAO) was developed from the 20 th century in the 70 th era, and a catalyst was added to a conventional Wet Oxidation reaction system, so that the reaction temperature and pressure were reduced, and the reaction efficiency was improved. The catalytic wet oxidation method has the advantages of relatively mild reaction conditions, high treatment efficiency, high reaction speed, small device, wide application range, resource recycling, low secondary pollution and the like, so the catalytic wet oxidation method has a good application prospect.

However, in the wet oxidation treatment process, although the reaction time is shortened to a certain extent and the operation temperature and pressure are reduced after the catalyst is used, so that the reaction conditions are milder, the cost is relatively high after the catalyst is used, and the subsequent recovery and treatment of the catalyst are considered after the subsequent reaction is finished, so that the operation is very inconvenient, and a lot of subsequent work is increased invisibly.

In view of this, the present invention is especially provided.

SUMMERY OF THE UTILITY MODEL

A first object of the utility model is to provide a landfill leachate's processing system, this processing system take place the system back through laying the micro-interface, has improved the mass transfer effect between the double-phase, and this micro-interface takes place the system and can smash the bubble into micron level's bubble to increase the interfacial area between gaseous phase and the liquid phase, make oxygen can form the gas-liquid emulsion with the better integration of landfill leachate, improve oxidation reaction efficiency.

Meanwhile, after the micro-interface generation system is adopted, the whole treatment system can be operated without adopting a catalyst, the cost is saved without adopting the catalyst, the problem of secondary pollution caused by subsequent recovery and treatment of the catalyst is avoided, the whole treatment method is simpler, more convenient and faster to operate, and the operation flow is correspondingly simplified.

A second object of the utility model is to provide an adopt above-mentioned processing system to carry out landfill leachate's processing method, this processing method is easy and simple to handle, operating condition is gentler, and the energy consumption is low, and among the landfill leachate after the processing, harmful removal rate can reach about 99%, is worth extensively popularizing and applying.

In order to realize the above purpose of the utility model, the following technical scheme is adopted:

the utility model provides a effluent disposal system for handling landfill leachate, include: the system comprises a raw water tank, a waste water heat exchanger, a waste water heater and an oxidation reactor which are connected in sequence, wherein the waste water heat exchanger is provided with a material inlet, a material outlet, a heat source inlet and a heat source outlet;

the oxidized water from the oxidation reactor enters the wastewater heat exchanger from the heat source inlet, the heat source outlet is connected with a finished product tank, the finished product tank is connected with membrane filtration equipment to realize the concentration treatment of the landfill leachate, the material inlet is connected with the raw water tank, and the material outlet is connected with the wastewater heater;

the outside of oxidation reactor is provided with the micro-interface generating system who is used for dispersing broken gas and becomes the bubble, micro-interface generating system includes a plurality of micro-interface generators that from top to bottom set up side by side, be provided with air inlet and waste water import on the micro-interface generator, what the waste water import came in is for following the waste water that the oxidation reactor inner loop returned, what the air inlet came in is fresh supplementary air or oxygen.

The utility model discloses landfill leachate of required processing has quality of water change characteristics such as big (quality of water is unstable), quality of water complicacy (containing multiple heavy metal ion and ammonia nitrogen), organic concentration height, biodegradability are poor usually, very easily causes serious pollution to peripheral soil layer and groundwater. Therefore, the effective collection and treatment of landfill leachate have attracted much attention and need to be solved, and the treatment technology of landfill leachate has become a research hotspot internationally.

In the prior art, a physical and chemical method, ozone or hydrogen peroxide oxidation, photochemical catalytic oxidation, a membrane separation method, a biological method and the like are mainly adopted, wherein the catalytic oxidation method is most widely applied, but in the wet oxidation treatment process, after the catalyst is adopted, although the operation temperature and the operation pressure are not high, the cost is higher after the catalyst is adopted, and after the subsequent reaction is finished, the problems of subsequent recovery and treatment of the catalyst are also considered, so that the operation is very inconvenient, and a lot of subsequent work is increased invisibly.

The utility model provides a treatment system specially for treating garbage leachate to solve the technical problems, the treatment system is provided with a micro-interface generation system outside the oxidation reactor, so that air or oxygen entering the oxidation reactor is broken and dispersed into bubbles, the bubbles and wastewater form gas-liquid emulsion, thereby increasing the phase interface area between the gas and the wastewater, further improving the reaction efficiency, and melting oxygen into the wastewater as much as possible after increasing the mass transfer effect of the reaction phase interface, thus, the good treatment effect can be ensured under the conditions of lower pressure and temperature without adopting a catalyst, or in order to ensure better treatment effect, a few catalysts can be added, the amount of the catalyst adopted in the traditional process can be reduced sufficiently, and the catalyst can be added or not added freely according to the actual operation condition.

For the utility model discloses a system takes place for little interface, including a plurality of little interface generator that from top to bottom set up side by side, above-mentioned a plurality of little interface generator are owing to adopt external mode, need with liquid phase and gaseous phase access simultaneously among the little interface generator, consequently be provided with the air inlet that lets in the gaseous phase and let in the waste water import of liquid phase on every little interface generator, landfill leachate that the oxidation reaction inner loop was returned gets into little interface generator from waste water import, fresh supplementary air or oxygen get into little interface generator from the air inlet, the gas-liquid is double-phase takes place the contact in little interface generator, in order to strengthen the reaction operation after the broken microbubble.

Preferably, the micro-interface generating system comprises two micro-interface generators, and the two micro-interface generators are connected in parallel with each other. The two micro-interface generators simultaneously carry out strengthening operation, and the reaction efficiency of wet oxidation can be improved.

The micro-interface generator is preferably a pneumatic micro-interface generator, compressed air or oxygen is introduced into the micro-interface generator, and then the compressed air or oxygen is contacted with wastewater and then is crushed into a micro-bubble form, so that the mass transfer effect is improved.

It is understood by those skilled in the art that a Micro Interfacial Generator (MIG) can break up a gas phase and/or a liquid phase in a multi-phase reaction medium into Micro bubbles and/or Micro droplets with a diameter of micron level in a Micro Interfacial Generator through a mechanical microstructure and/or a turbulent microstructure in a preset action mode before the multi-phase reaction medium enters a reactor, so as to increase a phase boundary mass transfer area between the gas phase and/or the liquid phase and/or the solid phase during a reaction process, improve mass transfer efficiency between reaction phases, and strengthen a multi-phase reaction within a preset temperature and/or a preset pressure range.

The preset action mode can be selected from one or more of a micro-channel action mode, a field force action mode and a mechanical energy action mode;

the micro-channel has the action mode that a micro-structure of a flow channel is constructed, so that a gas phase and/or a liquid phase passing through the micro-channel are/is broken into micro-bubbles and/or micro-droplets; the field force action mode is that the external field force is used for acting in a non-contact mode to input energy to the fluid, so that the fluid is broken into the micro-bubbles or micro-droplets; the mechanical energy action mode is to convert the mechanical energy of the fluid into the surface energy of the bubbles or the liquid drops so as to break the bubbles or the liquid drops into the micro-bubbles or the micro-liquid drops.

The micro-interface generator can be used for reactions of gas-liquid, liquid-solid, gas-liquid, gas-liquid-solid, liquid-solid and other multi-phase reaction media, the specific structure of the micro-interface generator can be freely selected according to different flowing media, and corresponding records are also provided in patents and documents before the specific structure and specific functional action of the micro-interface generator, and additional details are not provided herein. Meanwhile, the number and the position of the air inlets can be adjusted according to the actual engineering requirements and the factors such as the height, the length, the diameter, the waste water flow rate and the like of the oxidation reaction device in the system, so that the better air supply effect is achieved, and the degradation rate of wet oxidation on waste water treatment is improved.

Additionally, the utility model discloses an in the scheme, in order to retrieve the resource in landfill leachate, reduce landfill leachate's the wet-type oxidation degree of difficulty, improve the COD clearance of waste water, carry out the preliminary treatment to landfill leachate before wet-type oxidation at first, the preliminary treatment includes pretreatment methods such as deoiling, blow off.

Preferably, the treatment system further comprises a grating pool for intercepting suspended impurities, and the raw water tank is connected with the grating pool. The grid pond can realize holding back to suspended solid and floater in landfill leachate to reach preliminary edulcoration filterable effect.

Preferably, a raw water pump is arranged between the raw water tank and the grating pool for facilitating transportation.

Preferably, the treatment system further comprises an air flotation oil removal device and an ammonia stripping device, and the landfill leachate treated by the grid pond sequentially passes through the air flotation oil removal device and the ammonia stripping device for treatment. The air flotation oil removing device can adopt any one of a pressurizing dissolved air flotation method, a cavitation air flotation method and an induced air flotation method, and the air flotation oil removing mode has high oil removing efficiency and relatively stable treatment effect.

The ammonia stripping device utilizes the characteristic that ammonia nitrogen has volatility, adopts a method that the actual concentration of ammonia nitrogen in a solution is different from the equilibrium concentration under a determined condition, and uses air to carry out stripping under an alkaline condition so as to remove the volatile ammonia nitrogen in the landfill leachate.

Preferably, the treatment system further comprises a buffer tank disposed between the ammonia stripping unit and the wastewater heat exchanger. The buffer tank can buffer the pretreated landfill leachate.

Preferably, a transfer pump is provided between the buffer tank and the waste water heat exchanger, also for the convenience of transfer.

Preferably, for improved safety, the top of the oxidation reactor is provided with a vent.

Preferably, the lateral upper part of the oxidation reactor is provided with an oxidized water outlet, the oxidized water outlet is connected with the heat source inlet through a pipeline, and since a product from the oxidized water outlet contains a part of gas phase, the gas-liquid separation is preferably realized in the gas-liquid separation tank, and then the gas-liquid separation is introduced into the heat source inlet for heat exchange.

Preferably, the processing system further comprises an air compression device, the air compression device is communicated with the air inlet, and air or compressed oxygen compressed by the air compression device enters the micro-interface generator through the air inlet to be dispersed and smashed. The compressed air or oxygen from the air compressor is preferably heated in a gas heating device, preferably a heat exchanger, before entering the micro-interface generator.

And finally, storing the purified water after the wet oxidation reaction in a finished product tank, subsequently introducing the purified water into membrane filtration equipment for further treatment, wherein the membrane filtration equipment preferably comprises one or more of an ultrafiltration membrane, a nanofiltration membrane and RO (reverse osmosis) equipment, more preferably adopts a mode of combining the ultrafiltration membrane, the nanofiltration membrane and the RO reverse osmosis equipment, the concentrated solution after membrane filtration is continuously evaporated and desalted, and the concentrated solution after desalting can be returned to the raw water tank for repeated treatment to improve the biodegradability.

The utility model discloses a can set up the pump body according to actual need on corresponding connecting tube among the processing system.

The utility model discloses a landfill leachate's processing system throughput is high, handles the back through this processing system, can guarantee under the energy consumption condition that is lower than, possess higher treatment, and the harmful removal rate can reach about 99%.

In addition, the utility model also provides a landfill leachate's processing method, including following step:

heating the landfill leachate, then feeding the heated landfill leachate into an oxidation reactor, and simultaneously introducing compressed air or compressed oxygen into the oxidation reactor to perform wet oxidation reaction;

the compressed air or the compressed oxygen entering the oxidation reactor is firstly dispersed and crushed by a micro-interface generator;

preferably, the reaction temperature of the wet oxidation is controlled between 90 ℃ and 120 ℃, the reaction pressure is controlled between 1 MPa and 2MPa, and the reaction time is controlled between 1 h and 2 h.

The utility model discloses a landfill leachate's processing method easy and simple to handle, operating condition is gentler, and the energy consumption is low, and among the landfill leachate after the processing, harmful material, COD clearance can reach 99%, have reduced industrial waste's emission, and environmental protection more is worth extensively popularizing and applying.

Compared with the prior art, the beneficial effects of the utility model reside in that:

(1) the utility model discloses landfill leachate's processing system has improved the mass transfer effect between the double-phase through laying the micro-interface generator, and this micro-interface generator can break the bubble into micron level's bubble to increase the phase interface area between gaseous phase and the liquid phase, make oxygen can form the gas-liquid emulsion with better the fusing of landfill leachate, improve catalysis wet-type oxidation reaction efficiency;

(2) the wastewater treatment system of the utility model adopts the parallel structure of the double micro-interface generators, improves the wastewater treatment effect, and makes the maintenance and the disassembly more convenient by reasonably arranging the positions of the micro-interface generators;

(3) the wastewater treatment system of the utility model has simple structure, less three wastes, realization of the full recycling of oxygen, smaller floor area and stable operation;

(4) the utility model discloses a processing system need not adopt the catalyst, just can realize carrying out wet oxidation reaction than lower temperature, pressure condition under, does not adopt the catalyst not only to practice thrift the cost, has still removed the catalyst from and needs follow-up recovery, processing, causes the appearance of secondary pollution's problem, and whole processing method operation is more for simple and efficient, and operation flow is also corresponding simplifies a lot.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a flow chart of a method for treating landfill leachate provided by an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a system for treating landfill leachate provided by an embodiment of the present invention.

Description of the drawings:

10-a raw water tank; 20-raw water pump;

30-a grid tank; 40-air flotation oil removing device;

50-ammonia stripping means; 60-a buffer tank;

70-waste water heat exchanger; 71-material inlet;

72-material outlet; 73-heat source inlet;

74-outlet of heat source; 80-a waste water heater;

90-an oxidation reactor; 91-an oxidized water outlet;

92-a micro-interface generator; 93-gas heating means;

94-a pneumatic device; 95-a vent;

96-a wastewater inlet; 97-gas inlet;

100-a gas-liquid separation tank; 110-a delivery pump;

120-finished product tank; 130-membrane filtration device.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings and detailed description, but those skilled in the art will understand that the following described embodiments are some, not all, of the embodiments of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In order to clarify the technical solution of the present invention, the following description is made in the form of specific embodiments.

Examples

Referring to fig. 2, the system for treating landfill leachate according to an embodiment of the present invention includes a raw water tank 10, a waste water heat exchanger 70, a waste water heater 80, an oxidation reactor 90, and an air compression device 94, which are connected in sequence.

The waste water heat exchanger 70 is respectively provided with a material inlet 71, a material outlet 72, a heat source inlet 73 and a heat source outlet 74, oxidized water from the oxidation reactor 90 enters the waste water heat exchanger 70 from the heat source inlet 73, the heat source outlet 74 is connected with a finished product tank 120, the material inlet 71 is connected with the raw water tank 10, the material outlet 72 is connected with the waste water heater 80, and in the waste water heat exchanger 70, the oxidized water after the reaction of the oxidation reactor 90 exchanges heat with the landfill leachate to be treated, so that the effect of fully utilizing energy is achieved.

The outer side wall of the oxidation reactor 90 is provided with a micro-interface generating system, the micro-interface generating system is used for dispersing the broken gas into bubbles, the micro-interface generating system comprises two micro-interface generators 92 which are arranged in parallel from top to bottom, each micro-interface generator 92 is provided with an air inlet 97 and a waste water inlet 96, waste water which is circulated back from the oxidation reactor 90 enters from the waste water inlet, and fresh supplementary air or oxygen enters from the air inlet 97.

In this embodiment, the air compressing device 94 is communicated with the air inlet 97, and the air or oxygen compressed by the air compressing device 94 enters the micro-interface generator 92 through the air inlet 97 to realize the pulverization and dispersion of the gas so as to enhance the mass transfer effect between the two phases. The air compression device 94 of this embodiment is preferably an air compressor. The air or oxygen compressed by the air compressor is preheated by the gas heater 93 and then enters each of the micro-interface generators 92, so as to improve the reaction efficiency. The type of air compressor can be selected as a centrifugal air compressor, and the type of compressor is low in cost and convenient to use.

The micro-interface generator 92 is of the pneumatic type, and the micro-interface generator 92 may be a pipe-reinforced type.

The side upper portion of oxidation reactor 90 is provided with oxidation water outlet 91, and the oxidation water that oxidation water outlet 91 came out carries out gas-liquid separation through gas-liquid separation jar 100 earlier, then comes out from the bottom of gas-liquid separation jar 100 and is connected with heat source import 73 through the pipeline to realize carrying waste water heat exchanger 70 with the oxidation water and carry the heat transfer, cool off after the heat transfer and carry and store in finished product jar 120. The water from the product tank 120 may continue to undergo subsequent desalination. The desalination concentration adopts the membrane filtration equipment 130, and the concentration treatment is carried out by combining three kinds of equipment of ultrafiltration membrane, nanofiltration membrane and RO reverse osmosis equipment in the embodiment, and the treatment mode can be adjusted according to actual conditions.

The treatment system also comprises a pretreatment system comprising a grating pool 30, an air flotation oil removal device 40 and an ammonia stripping device 50, wherein the wastewater after impurities are stripped by the pretreatment system is temporarily stored in a buffer tank 60 and then enters the wastewater heat exchanger 70 from the buffer tank 60 through a delivery pump 110.

For the convenience of transportation, a raw water pump 20 is further provided between the raw water tank 10 and the grid pond 30, and a transportation pump 110 is provided between the buffer tank 60 and the wastewater heat exchanger 70.

In the above embodiment, the number of the micro-interface generators in the micro-interface generating system is not limited, and in order to increase the dispersion and mass transfer effects, additional micro-interface generators may be additionally provided, especially, the installation position of the micro-interface generator is not limited, and the micro-interface generator may be external or internal, and when the micro-interface generator is internal, the micro-bubble generator may be installed on the side wall in the kettle in a manner of being oppositely arranged, so as to generate the opposite impact of the micro-bubbles coming out from the outlet of the micro-interface generator. When the micro-interface generator is externally arranged, the micro-interface generators are preferably arranged in parallel.

In the two embodiments, the number of the pump bodies is not specifically required, and the pump bodies can be arranged at corresponding positions according to requirements.

The following brief description illustrates the working process and principle of the garbage leachate treatment system of the present invention, and the specific working process refers to fig. 1:

firstly, after nitrogen gas purges the raw water tank 10, the waste water heat exchanger 70, the waste water heater 80, the pipelines of the oxidation reactor 90 and the inside of the oxidation reactor 90, the landfill leachate in the raw water tank 10 is firstly sent to the grid pond 30 to remove the suspensionImpurities are sequentially removed through the air floatation oil removal device 40 to realize the recycling of oil resource, and the ammonia stripping device 50 removes volatile ammonia nitrogen to realize molecular NH₃The blow-off is discharged and the treated wastewater is temporarily stored in a buffer tank 60.

Then, the landfill leachate is sent into a wastewater heat exchanger 70 through a delivery pump 110 for heat exchange, and then is further heated through a wastewater heater 80, the heated landfill leachate enters an oxidation reactor 90 for catalytic wet oxidation treatment, the catalyst is soluble transition metal salt or a supported noble metal catalyst, and a mode without adopting the catalyst can be selected according to actual working conditions.

Compressed air or compressed oxygen is introduced into the micro-interface generator 92 from the bottom of the side of the oxidation reactor 90, wastewater in the oxidation reactor 90 circularly enters the micro-interface generator 92, and gas-liquid two phases are simultaneously dispersed and crushed into micro-bubbles through the micro-interface generator 92 arranged in parallel, so that the effect of strengthening the progress of the oxidation reaction is achieved, and in order to improve the safety, a vent 95 is further arranged at the top of the oxidation reactor 90. The reaction temperature of wet oxidation in the oxidation reactor 90 is controlled between 90 ℃ and 120 ℃, the reaction pressure is controlled between 1 MPa and 2MPa, and the reaction time is controlled between 1 h and 2 h.

And finally, returning the oxidized water after the oxidation reaction in the oxidation reactor 90 from the top of the oxidation reactor 90 to the wastewater heat exchanger 70 for heat exchange and cooling treatment, conveying the oxidized water to a finished product tank 120 for storage, and continuing to perform subsequent concentration treatment on substances discharged from the finished product tank, wherein membrane filtration equipment 130 is selected as the concentration treatment equipment, and the qualified discharge can be realized after membrane filtration.

The above steps are repeated circularly to make the whole treatment system run smoothly.

The utility model discloses a processing system has guaranteed that wet oxidation goes on under more gentle pressure and temperature condition through laying little interface emergence system, and need not adopt the use amount of catalyst or greatly reduced catalyst.

Compare with prior art landfill leachate's processing system, the utility model discloses a processing system equipment subassembly is few, area is little, the energy consumption is low, with low costs, the security is high.

In a word, the utility model discloses a landfill leachate's processing system throughput is high, handles the back through this processing system, can guarantee under the energy consumption condition that is lower than, possess higher treatment effect, and harmful material, COD clearance can reach 99%, and is best to the treatment effect of the high COD waste water of high salt.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A landfill leachate treatment system, comprising: the system comprises a raw water tank, a waste water heat exchanger, a waste water heater and an oxidation reactor which are connected in sequence, wherein the waste water heat exchanger is provided with a material inlet, a material outlet, a heat source inlet and a heat source outlet;

2. The treatment system of claim 1, wherein the membrane filtration device comprises any one or more of an ultrafiltration membrane, a nanofiltration membrane, and an RO reverse osmosis device.

3. The processing system of claim 1, wherein the micro-interface generating system comprises two micro-interface generators, the two micro-interface generators being connected in parallel with each other.

4. A treatment system according to claim 1, further comprising a grid basin for retaining suspended debris, the raw water tank being connected to the grid basin.

5. A treatment system according to claim 4, wherein a raw water pump is provided between the raw water tank and the grating basin.

6. The treatment system according to claim 4, further comprising an air flotation oil removal device and an ammonia stripping device, wherein the landfill leachate treated by the grid pond is sequentially treated by the air flotation oil removal device and the ammonia stripping device.

7. The treatment system of claim 6, further comprising a buffer tank disposed between the ammonia stripping unit and the wastewater heat exchanger.

8. A treatment system according to claim 7, wherein a transfer pump is provided between the buffer tank and the waste water heat exchanger.

9. The treatment system according to any one of claims 1 to 8, wherein the top of the oxidation reactor is provided with a vent.