CN215559661U

CN215559661U - Landfill leachate membrane after-concentration liquid treatment system

Info

Publication number: CN215559661U
Application number: CN202122149875.6U
Authority: CN
Inventors: 李梦佳; 俞建波
Original assignee: Shanghai Shengyun Environmental Technology Co ltd
Current assignee: Shanghai Shengyun Environmental Technology Co ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2022-01-18
Anticipated expiration: 2031-09-07

Abstract

The utility model discloses a system for treating a concentrated solution behind a landfill leachate membrane, which comprises: a flash tank; a circulation pump; a heat exchanger; the high-temperature concentrated solution is suitable for automatically flowing from the bottom of the flash tank to enter an inlet of the circulating pump, is pressurized by the circulating pump and then enters the heat exchanger, and enters the flash tank for flash evaporation after being heated by the heat exchanger. The landfill leachate membrane post-concentration liquid treatment system adopts an external heat exchanger mode, can greatly improve heat exchange efficiency and concentration multiple, and can effectively save energy.

Description

Landfill leachate membrane after-concentration liquid treatment system

Technical Field

The utility model relates to the field of flash evaporation, and further relates to a landfill leachate membrane post-concentration liquid treatment system.

Background

The existing mechanical vapor recompression (MVR (mechanical vapor recompression) evaporation process of landfill leachate concentrated solution is a built-in tube (vertical or horizontal) heat exchange evaporation technology, and is an evaporation process for simultaneously carrying out heat exchange and evaporation. As the concentrated solution is gasified and evaporated on the tube wall, a large amount of miscellaneous salt, hardness salt and the like contained in the material are separated out to form crystal nuclei or scales which are attached to the inner walls of equipment such as a heat exchanger, a heat exchange tube and the like, the phenomenon of scaling, fouling and blocking can occur in a short time, and the efficiency of the heat exchanger is reduced or even loses efficacy. Once scaling occurs, the evaporation system needs to be shut down for cleaning, and the scaling cannot be completely eliminated through cleaning, so that the existing built-in heat exchange MVR technology cannot stably operate for a long time. In addition, due to the limitation of scaling and fouling, the TDS concentration of the waste water after MVR concentration does not exceed 250000mg/L, namely the concentration multiple does not exceed 5 times (the TDS concentration of the raw water entering the MVR system is generally 50000-100000 mg/L). The mother liquor discharged from the evaporation system is not effectively treated, and the high-salt high-organic wastewater can cause great harm to domestic drinking water and industrial and agricultural production water if being directly discharged without being treated. In addition, the liquid in existing system flash tanks typically requires the pressure of the recycle pump at all to drive the flow, and typically consumes a relatively large amount of energy.

In addition, the condensate water discharged from the existing evaporation system has high COD and ammonia nitrogen content, cannot reach the corresponding discharge standard, and has no effective measure for effectively removing odor.

In view of the above, there is a need for an improvement to existing landfill leachate membrane post-concentrate concentration evaporation systems.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problems, the present invention aims to provide an external heat exchange flash evaporation MVR landfill leachate concentrated solution evaporation system, wherein the landfill leachate membrane post-concentrated solution treatment system adopts an external heat exchanger, and the liquid in the flash evaporator can automatically flow into an inlet of a circulating pump, which can greatly improve the concentration multiple and effectively save energy;

in order to achieve the above object, the present invention provides a landfill leachate membrane post-concentrate treatment system, comprising:

the system comprises a flash tank, a circulating pump, a heat exchanger, a concentrated solution tank, a centrifugal machine, solidification equipment and drying equipment;

the high-temperature concentrated solution is suitable for automatically flowing from the bottom of the flash tank into an inlet of the circulating pump, is pressurized by the circulating pump, then enters the heat exchanger, is heated by the heat exchanger, and then enters the flash tank for flash evaporation;

the system for treating the concentrated solution after the landfill leachate membrane further comprises a concentrated solution tank, wherein part of concentrated solution at the outlet of the circulating pump enters the concentrated solution tank through a first pipeline, and part of concentrated solution enters an inlet of the circulating pump through a second pipeline and flows back to the circulating pump;

wherein the first pipeline is provided with a first automatic valve, and the second pipeline is provided with a second automatic valve;

centrifuge with concentrate case intercommunication, the concentrate is in the concentrate incasement tentatively reaches the effect of solid-liquid preseparation, discharges after the dwell predetermined time centrifuge carries out solid-liquid separation, and the solid of separation gets into curing equipment, the supernatant gets into drying equipment, drying equipment is used for the mummification supernatant, and the solid after the mummification discharges into curing equipment.

Preferably, the landfill leachate membrane post-concentration liquid treatment system further comprises a regulating valve, the regulating valve is installed in a pipeline between the heat exchanger and the flash tank, and the opening degree of the regulating valve is adjusted to control the liquid pressure after passing through the circulating pump so as to control the boiling point of the concentration liquid entering the flash tank.

Preferably, the heat exchanger is a plate heat exchanger.

Preferably, the landfill leachate membrane post-concentration liquid treatment system further comprises a demister and a steam compressor, secondary steam flashed by the flash tank enters the steam compressor after foam impurities are removed by the demister, and the secondary steam is converted into high-temperature and high-pressure steam after adiabatic compression by the steam compressor and enters the heat exchanger to exchange heat with the concentration liquid delivered by the circulating pump.

Preferably, the landfill leachate membrane post-concentration liquid treatment system further comprises a condensed water tank, and condensed water passing through the heat exchanger is suitable for entering the condensed water tank.

Preferably, the landfill leachate membrane post-concentrate treatment system further comprises a third automatic valve connected to the heat exchanger, through which steam can be supplemented to the heat exchanger.

Preferably, the landfill leachate membrane post-concentration liquid treatment system further comprises a raw material tank, a raw material pump and a fourth automatic valve, wherein the raw material pump is suitable for driving liquid in the raw material tank to enter a connecting pipeline between the flash tank and the circulating pump, and the fourth automatic valve is installed on a pipeline at the outlet of the raw material pump.

Preferably, the heat exchange surface of the heat exchanger adopts a bent texture design, so that the concentrated solution is in a turbulent flow state.

Preferably, the landfill leachate membrane post-concentrate treatment system further comprises a degassing tank located between the condensate tank and the heat exchanger, a deodorizing device communicated with the degassing tank, and a fifth automatic valve located between the deodorizing device and the degassing tank; through the degassing tank, non-condensable gas enters the deodorizing device through the fifth automatic valve, and liquid enters the condensed water tank.

Preferably, the landfill leachate membrane post-concentrate treatment system further comprises a condensate water heat exchanger, a condensate water pump, a reverse osmosis device, an ammonia nitrogen adsorption device and a reuse water tank;

the condensed water heat exchanger is communicated with the condensed water tank, and the condensed water pump is positioned between the condensed water heat exchanger and the condensed water tank and is used for driving liquid in the condensed water tank to pass through the condensed water heat exchanger;

and the liquid passing through the condensed water heat exchanger is suitable for sequentially passing through the reverse osmosis device and the ammonia nitrogen adsorption device to enter the reuse water tank.

Compared with the prior art, the landfill leachate membrane post-concentration liquid treatment system provided by the utility model has at least one of the following beneficial effects:

1. according to the landfill leachate membrane post-concentration liquid treatment system, an external heat exchanger is adopted, so that the concentration multiple can be greatly increased, and energy can be effectively saved;

2. according to the landfill leachate membrane post-concentration liquid treatment system provided by the utility model, part of the concentrated liquid at the outlet of the circulating pump of the landfill leachate membrane post-concentration liquid treatment system enters the concentrated liquid tank through the first pipeline, and part of the concentrated liquid enters the inlet of the circulating pump through the second pipeline and flows back to the inlet of the circulating pump, so that the concentrated liquid crystal salt is prevented from being deposited in the pipeline, and the second automatic valve is opened when the materials are not discharged, so that the concentrated liquid circularly flows in the pipeline;

3. according to the landfill leachate membrane post-concentration liquid treatment system, the heat exchanger of the landfill leachate membrane post-concentration liquid treatment system is designed by adopting a plate heat exchanger, so that the heat exchange efficiency is greatly improved, and the floor area of equipment is reduced;

4. the garbage leachate membrane post-concentrate treatment system provided by the utility model can effectively remove COD (chemical oxygen demand) and ammonia nitrogen of steam condensate, and adopts a reverse osmosis device and an ammonia nitrogen adsorption device to effectively reduce the concentration of COD and ammonia nitrogen in the effluent of the steam condensate. This landfill leachate concentrate technology package deodorization system adopts acid-base washing deodorizing device, effectively handles the foul smell that noncondensable gas carried. The steam condensate water produced by the landfill leachate concentrated solution process bag reaches the pollution control standard of domestic garbage landfill (GB16889-2008), can be used as road washing, landscaping and the like, and generates certain environmental protection benefits.

Drawings

The above features, technical features, advantages and modes of realisation of the present invention will be further described in the following detailed description of preferred embodiments thereof, which is to be read in connection with the accompanying drawings.

Fig. 1 is a block diagram of a landfill leachate membrane post-concentrate treatment system of the present invention.

The reference numbers illustrate:

the system comprises a flash tank 1, a circulating pump 2, a heat exchanger 3, a concentrate tank 41, a first pipeline 42, a second pipeline 43, a first automatic valve 44, a second automatic valve 45, a centrifuge 46, a curing device 47, a drying device 48, a regulating valve 49, a demister 51, a vapor compressor 52, a condensate water tank 61, a third automatic valve 62, a raw material tank 71, a raw material pump 72, a fourth automatic valve 73, a degassing tank 81, a deodorizing device 82, a fifth automatic valve 83, a condensate water heat exchanger 84, a condensate water pump 85, a reverse osmosis device 86, an ammonia nitrogen adsorption device 87 and a recycling water tank 88.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the utility model, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

For the sake of simplicity, only the parts related to the utility model are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

Example 1

Referring to fig. 1, the landfill leachate membrane post-concentration treatment system provided by the present invention is illustrated, and the landfill leachate membrane post-concentration treatment system provided by the present invention employs an external heat exchanger, which can greatly increase the concentration multiple and effectively save energy.

Specifically, the landfill leachate membrane post-concentration liquid treatment system comprises a flash tank 1, a circulating pump 2 and a heat exchanger 3. The flash tank 1, the circulating pump 2 and the heat exchanger 3 form a circulating system through pipelines, high-temperature concentrated solution is suitable for automatically flowing from the bottom of the flash tank 1 to enter an inlet of the circulating pump 2, is pressurized by the circulating pump 2 and then enters the heat exchanger 3, and enters the flash tank 1 after being heated by the heat exchanger 3 to be flashed.

Further, the landfill leachate membrane post-concentration liquid treatment system further comprises a concentration liquid tank 41, a part of the concentration liquid at the outlet of the circulating pump enters the concentration liquid tank 41 through a first pipeline 42, and a part of the concentration liquid flows back to the inlet of the circulating pump through a second pipeline 43; wherein the first pipe 42 is provided with a first automatic valve 44, and the second pipe 43 is provided with a second automatic valve 45.

When the raw material liquid is concentrated to a certain multiple in the flash tank 1, the raw material liquid needs to be discharged into the concentrated liquid tank 41 from the circulating pump 2 at regular time, and the discharging switching is mainly performed through the first automatic valve 44 and the second automatic valve 45. In order to prevent the deposition of the crystallized salt in the concentrated solution in the pipeline, the second automatic valve 45 is opened when the discharge is not performed, so that the concentrated solution circularly flows in the pipeline.

The landfill leachate membrane post-concentration liquid treatment system further comprises a centrifuge 46, a curing device 47 and a drying device 48; centrifuge 46 with concentrate case 41 intercommunication, the concentrate is in reach the effect of solid-liquid preseparation in concentrate case 41 tentatively, discharge into after the dwell predetermined time centrifuge 46 carries out solid-liquid separation, and the solid of separation gets into curing equipment 47, the supernatant gets into drying equipment 48, drying equipment 48 is used for the mummification supernatant, and the solid after the mummification discharges into curing equipment 47. The curing device 47 cures the part of the salt slurry discharged from the centrifuge 46 and the drying device 48 into cured salt slurry with a certain strength by adding a curing agent, and the cured salt slurry is bagged and then transported outside.

The concentrated solution discharged from the flash tank 1 is centrifuged at a high speed by the centrifuge 46, and then the solid-liquid separation effect is achieved. The solid salt slurry is spirally pushed out through the interior of the centrifuge 46, and the supernatant is discharged through a liquid outlet. The centrifuge 46 needs to be cleaned in time after working, and raw material liquid for cleaning is not introduced with outside water. The drying device 48 adopts a roller drying form, high-temperature steam is used as a heat source, the roller adheres the concentrated solution feed liquid, the concentrated solution feed liquid is instantly dried under the action of high temperature to form a layer of salt mud film, and the salt mud film is scraped off by a scraper on the other side and falls into the spiral to be conveyed outwards. The solidification equipment 47 stirs and reacts the salt mud discharged by the centrifuge 46 and the drying equipment 48 with a curing agent, so that the salt mud reaches harmless and has certain strength and hardness, and is bagged and transported outside.

Further, the landfill leachate membrane post-concentration liquid treatment system further comprises a regulating valve 49, wherein the regulating valve 49 is installed in a pipeline between the heat exchanger 3 and the flash tank 1, and the opening degree of the regulating valve 49 is adjusted to control the liquid pressure after passing through the circulating pump 2 so as to control the boiling point of the concentration liquid entering the flash tank 1. Preferably, the liquid pressure after passing through the circulating pump 2 is adjusted to a pressure of 0.2MPa or more by the adjusting valve 49, the boiling point of the concentrated solution is controlled to be 120 ℃ or more, and the concentrated solution is prevented from evaporating on the surface of the heat exchanger 3 to separate out salt crystals. The high-temperature concentrated solution enters the normal-pressure flash tank 1 for instantaneous evaporation after passing through the regulating valve 49, so that the evaporation efficiency is greatly improved. By adjusting the opening of the adjusting valve 49, the pressure in the pipeline behind the circulating pump is kept at a certain pressure, the concentrated solution is controlled not to boil, and salt crystals are prevented from being separated out due to evaporation on the surface of the heat exchanger. The high-temperature concentrated solution enters a normal-pressure flash tank for instantaneous evaporation after passing through a valve A, so that the evaporation efficiency is greatly improved.

Preferably, the heat exchanger 3 is a plate heat exchanger. The plate heat exchanger is made of corrosion-resistant alloy, the three flow channels are designed, the temperature rise of the concentrated solution is controlled to be 3-5 ℃, and the heat exchange efficiency is effectively improved. The design of the plate heat exchanger is adopted, so that the heat exchange efficiency is greatly improved, and the occupied area of equipment is reduced.

Further, the landfill leachate membrane post-concentration liquid treatment system further comprises a demister 51 and a steam compressor 52, secondary steam flashed by the flash tank 1 enters the steam compressor 52 after foam impurities are removed by the demister 51, and the secondary steam is converted into high-temperature and high-pressure steam after adiabatic compression by the steam compressor 52 and enters the heat exchanger 3 to exchange heat with the concentration liquid sent by the circulating pump 2.

The demister 51 can remove a small amount of organic froth and other particulate impurities carried in the secondary steam generated by the flash tank 1, and protect the stable operation of the steam compressor 52.

The landfill leachate membrane post-concentration liquid treatment system further comprises a condensation water tank 61, and condensation water passing through the heat exchanger 3 is suitable for entering the condensation water tank 61. The latent heat of the saturated steam is completely absorbed by the strong brine in the heat exchange process, and the saturated steam finally enters the condensed water tank 61 from the outlet of the heat exchanger 3 in the form of condensed water.

Further, the landfill leachate membrane post-concentration liquid treatment system further comprises a third automatic valve 62, wherein the third automatic valve 62 is connected to the heat exchanger 3, and steam can be supplemented to the heat exchanger 3 through the third automatic valve 62. When the system is started, the third automatic valve 62 needs to be opened to supplement external steam so that the concentrated solution in the flash tank 1 reaches the evaporation temperature, and then the steam compressor 52 is started to enable the evaporation system to operate stably by itself.

The landfill leachate membrane post-concentration liquid treatment system further comprises a raw material tank 71, a raw material pump 72 and a fourth automatic valve 73, wherein the raw material pump 72 is suitable for driving liquid in the raw material tank 71 to enter a connecting pipeline between the flash tank 1 and the circulating pump 2, and the fourth automatic valve 73 is installed on a pipeline at the outlet of the raw material pump 72. And after discharging, periodically replenishing the raw material liquid to the evaporation system according to the liquid level change in the flash tank 1. The raw material liquid is conveyed to the inlet pipeline of the circulating pump 2 through a raw material pump 72 and then enters an evaporation system.

And the concentrated solution in the flash tank 1 is discharged intermittently in a small amount, and the raw material solution in the raw material tank 71 is supplemented regularly in a small amount, so that the temperature of the concentrated solution in the flash tank 1 is maintained above 110 ℃, the secondary steam pressure is maintained above 15kPa, the stable operation of an evaporation system can be maintained, and the dynamic balance of heat is realized.

Preferably, the circulating pump 2 is a high-flow pump, the circulating flow is 200-400 times of the flow of the raw material pump 72, the lift of the circulating pump 2 is 20-30m, the flow rate of an outlet pipeline of the circulating pump 2 is designed to be 3-4 m/s, and the high-flow, high-lift and high-flow design is adopted, so that the concentrated solution forms strong scouring on the surface of the plate heat exchanger, and the concentrated solution can be effectively prevented from scaling in the heat exchanger 3.

Preferably, the heat exchange surface of the heat exchanger 3 adopts a bent texture design, so that the concentrated solution is in a turbulent flow state, and salt crystals are effectively prevented from being separated out.

Further, the landfill leachate membrane post-concentration treatment system further includes a degassing tank 81 located between the condensation water tank 61 and the heat exchanger 3, a deodorization device 82 communicated with the degassing tank 81, and a fifth automatic valve 83 located between the deodorization device 82 and the degassing tank 81. By the degassing tank 81, the non-condensable gas is introduced into the deodorizing means 82 through the fifth automatic valve 83, and the liquid is introduced into the condensed water tank 61.

The landfill leachate membrane post-concentration liquid treatment system further comprises a condensed water heat exchanger 84, a condensed water pump 85, a reverse osmosis device 86, an ammonia nitrogen adsorption device 87 and a reuse water tank 88. The condensed water heat exchanger 84 is communicated with the condensed water tank 61, and the condensed water pump 85 is located between the condensed water heat exchanger 84 and the condensed water tank 61 and is used for driving liquid in the condensed water tank 61 to pass through the condensed water heat exchanger 84. The liquid after passing through the condensed water heat exchanger 84 is suitable for passing through the reverse osmosis device 86 and the ammonia nitrogen adsorption device 87 in sequence and entering the reuse water tank 88.

The condensate water heat exchanger 84 exchanges heat of steam condensate water to normal temperature, the outlet water enters the reverse osmosis device 86, a reverse osmosis membrane of the reverse osmosis device 86 intercepts most COD molecules, and the outlet water can selectively enter the ammonia nitrogen adsorption device 87 again according to the ammonia nitrogen concentration condition. The ammonia nitrogen adsorption device 87 adsorbs and removes ammonia nitrogen molecules remained in reverse osmosis water production. The concentrated water of the reverse osmosis device 86 and the regenerated water of the ammonia nitrogen adsorption device 87 are pumped back to the raw material tank 71 and enter the evaporation system again for treatment.

The steam condensate discharged from the heat exchanger 3 contains a part of non-condensable gas, the degassing tank 81 separates gas from water, the non-condensable gas controls the internal pressure of the degassing tank 81 through the opening degree of the fifth automatic valve 83, so that the outlet pressure of the steam compressor 52 is maintained, and the steam in the heat exchanger 3 exchanges heat with the concentrated solution stably. The non-condensable gas discharged from the degassing tank 81 enters the deodorizing device 82, and odor molecules are washed, adsorbed and removed.

This behind landfill leachate membrane concentrate processing system technology package condensate water processing system adopts reverse osmosis unit and ammonia nitrogen adsorption equipment, effectively reduces steam condensate water COD and ammonia nitrogen concentration. This landfill leachate concentrate technology package deodorization system adopts acid-base washing deodorizing device, effectively handles the foul smell that noncondensable gas carried. The steam condensate water produced by the landfill leachate concentrated solution process bag reaches the pollution control standard of domestic garbage landfill (GB16889-2008), can be used as road washing, landscaping and the like, and generates certain environmental protection benefits.

Preferably, the TDS concentration of the material in the flash tank 1 can be concentrated to above 400000mg/L, so that the volume of the raw material is greatly reduced, and the burden of subsequent mother liquor treatment is reduced. The concentrated brine pipeline in the system is made of 2205 materials, and the secondary steam pipeline is made of 316L materials, so that the corrosion resistance and stable operation of the system are guaranteed.

Because the external heat exchange flash evaporation MVR evaporation system process fundamentally solves the scaling problem, the raw material liquid entering the evaporation system does not need to be subjected to pretreatment such as hardness removal, SS (suspended solids) removal, COD (chemical oxygen demand) removal and the like, the process flow of waste water evaporation crystallization treatment is greatly shortened, and the treatment cost and the operation intensity of waste water are greatly reduced. The evaporation system process effectively carries out post-treatment on the evaporation mother liquor, so that the system has no mother liquor discharge, and the subsequent mother liquor treatment cost is greatly reduced. The external heat exchange flash evaporation MVR evaporation process system adopts full-automatic control, and effectively reduces personnel configuration and operation intensity. The cleaning period of the external heat exchange flash evaporation MVR evaporation process system provided by the utility model is more than 6 months, and the maintenance intensity of the system is greatly reduced.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. Landfill leachate membrane back concentrate processing system, its characterized in that includes:

part of the concentrated solution at the outlet of the circulating pump enters the concentrated solution tank through a first pipeline, and part of the concentrated solution flows back to the inlet of the circulating pump through a second pipeline;

2. The landfill leachate membrane post concentrate processing system of claim 1, further comprising a regulating valve installed in a pipe between the heat exchanger and the flash tank, wherein a pressure of the liquid after passing through the circulation pump can be controlled by adjusting an opening degree of the regulating valve to control a boiling point of the concentrate entering the flash tank.

3. The landfill leachate membrane post concentrate treatment system of claim 2, wherein the heat exchanger is a plate heat exchanger.

4. The landfill leachate membrane post-concentrate treatment system of claim 3, wherein the landfill leachate membrane post-concentrate treatment system further comprises a demister and a steam compressor, the secondary steam flashed by the flash tank enters the steam compressor after being subjected to foam impurity removal by the demister, and the steam which is subjected to adiabatic compression by the steam compressor and becomes high-temperature and high-pressure steam enters the heat exchanger to exchange heat with the concentrate sent by the circulating pump.

5. The landfill leachate membrane post concentrate processing system of claim 4, wherein the landfill leachate membrane post concentrate processing system further comprises a condensate tank, the condensate after passing through the heat exchanger being adapted to enter the condensate tank.

6. The landfill leachate membrane post concentrate treatment system of claim 5, wherein the landfill leachate membrane post concentrate treatment system further comprises a third automatic valve connected to the heat exchanger through which steam can be replenished.

7. The landfill leachate membrane post concentrate handling system of any one of claims 1 to 6, wherein the landfill leachate membrane post concentrate handling system further comprises a feed tank, a feed pump adapted to drive liquid in the feed tank into the connecting line between the flash tank and the circulation pump, and a fourth automatic valve mounted to the line at the outlet of the feed pump.

8. The landfill leachate membrane post concentrate treatment system of claim 7, wherein the heat exchange surfaces of the heat exchanger are configured with a serpentine pattern to maintain the concentrate in a turbulent state.

9. The landfill leachate membrane post-concentrate treatment system of claim 5, further comprising a degassing tank between the condensate tank and the heat exchanger, a deodorizing means communicating with the degassing tank, and a fifth automatic valve between the deodorizing means and the degassing tank; through the degassing tank, non-condensable gas enters the deodorizing device through the fifth automatic valve, and liquid enters the condensed water tank.

10. The landfill leachate membrane post-concentrate treatment system of claim 9, further comprising a condensate water heat exchanger, a condensate water pump, a reverse osmosis device, an ammonia nitrogen adsorption device and a reuse water tank;