CN215711954U

CN215711954U - DTRO membrane module and garbage leachate two-stage DTRO process treatment system using same

Info

Publication number: CN215711954U
Application number: CN202121383879.4U
Authority: CN
Inventors: 叶素霞; 郑佳; 蒋建龙; 陈坚; 章旭钢; 孙超; 汤文静
Original assignee: Hangzhou Kangnuo Environment Technology Engineering Co ltd
Current assignee: Hangzhou Kangnuo Environment Technology Engineering Co ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2022-02-01
Anticipated expiration: 2031-06-21

Abstract

The utility model belongs to the technical field of garbage treatment, and particularly relates to a DTRO membrane module and improvement and application of a garbage leachate two-stage DTRO process treatment system using the same; the upstream of the DTRO membrane module is sequentially connected with the pretreatment tank and the regulating tank, the downstream is simultaneously connected with the concentrated water tank and the water production tank, and the secondary filtration function of a second chamber in the DTRO membrane module is utilized, so that the purpose of performing secondary treatment on the landfill leachate by utilizing one DTRO membrane module is realized.

Description

DTRO membrane module and garbage leachate two-stage DTRO process treatment system using same

Technical Field

The utility model belongs to the technical field of garbage treatment, and particularly relates to a DTRO membrane module and improvement and application of a garbage leachate two-stage DTRO process treatment system using the same.

Background

The landfill leachate is influenced by various factors such as external rainfall, biological fermentation and the like, belongs to high-concentration organic wastewater with complex components and large water quality and water quantity change, and the treatment of the high-concentration organic wastewater is a worldwide difficult problem in the field of water treatment. At present, the researches on landfill leachate treatment at home and abroad mainly focus on two aspects of high-concentration ammonia nitrogen removal and advanced treatment. Although the traditional biological landfill leachate treatment process has lower cost, the hydraulic retention time is longer, the occupied area is larger, and the effluent quality can not meet the relevant requirements. At present, the landfill leachate is treated by combining a biological method, a physical and chemical method, a membrane technology, a DTRO (draw texturing and reverse osmosis) disc-tube reverse osmosis membrane method and other methods, particularly the DTRO disc-tube reverse osmosis membrane technology is more and more widely applied to the aspect of landfill leachate, the effluent effect is good, but the problems of high membrane cost, short service life, easy pollution and the like exist at the same time.

Disclosure of Invention

The utility model aims to provide a DTRO membrane module and a two-stage DTRO process treatment system for landfill leachate using the same.

In order to realize the purpose of the utility model, the technical proposal adopted by the utility model is as follows: the utility model provides a DTRO membrane module, includes the column membrane shell, be provided with in the inner chamber of membrane shell with membrane shell inner chamber sealing connection's baffle, the baffle will the inner chamber of membrane shell is divided into a first cavity and at least one second cavity, first cavity and every all be provided with the DTRO membrane body in the second cavity, the open end of first cavity and second cavity all is provided with the sealing member, every all be provided with the valve group on the sealing member, the valve group is including the first valve that is used for discharging reverse osmosis water, the second valve that is used for to the internal stoste of supply of DTRO membrane and the third valve that is used for discharging the concentrate.

In order to more clearly illustrate the utility model, as a further optimization of the scheme, the DTRO membrane body comprises a flow guide disc, a flow guide pipe is arranged on an axial central line of the flow guide disc, a plurality of holes are formed in the pipe wall of the flow guide pipe, a plurality of cavities are formed in the flow guide disc, a DTRO membrane is arranged in each cavity, the DTRO membrane divides the cavity into a stock solution cavity and a drainage cavity communicated with the holes, one side of the DTRO membrane, which is located on the stock solution cavity, is in sealing contact with a sealing gasket, and a sealing plate is arranged above one side of the drainage cavity.

As the further optimization of above-mentioned scheme, the sealing member includes the flange sealed dish, each open end of membrane shell inner chamber is fixed respectively and is provided with a flange sealed dish, be provided with a catch groove on the flange sealed dish, the catch groove will the inner chamber of membrane shell divide into filter chamber and flowing back chamber, the top of catch groove with the one end contact of guiding disk, the central point of flange sealed dish puts and is provided with the connecting pipe, the one end of connecting pipe with the guiding pipe intercommunication, the other end runs through the flange sealed dish and place in the outside of membrane shell is located the flange sealed dish outside be provided with the outlet on the connecting pipe, be provided with on the flange sealed dish at least one with the inlet of filter chamber intercommunication and, at least one with the liquid outlet of the sealed intercommunication of flowing back chamber.

As a further optimization of the above scheme, a connecting piece for fixing the DTRO membrane module is further arranged outside the water outlet of the connecting pipe.

As a further optimization of the scheme, at least one groove is formed in the inner wall of the opening end of the membrane shell, and at least one fixing piece in interference fit with the groove is further arranged on the side face of the flange sealing disk body.

As a further optimization of the above scheme, the first valve is disposed on the water outlet, the second valve is disposed on the liquid inlet, and the third valve is disposed on the liquid outlet.

As a further optimization of the above scheme, a three-way valve is arranged on the second valve of the first chamber, the first valve on the first chamber is communicated with the second valve of the second chamber through a pipeline, a multi-way valve is arranged on the third valve of the second chamber, and one of outlets of the multi-way valve is communicated with the three-way valve on the second valve of the first chamber.

The utility model provides a two-stage DTRO process treatment system of landfill leachate with the DTRO membrane module, includes at least one DTRO membrane module, the DTRO membrane module has and only has a valve to pass through the pipeline intercommunication and has the preliminary treatment pond, the upstream intercommunication in preliminary treatment pond has the equalizing basin, the third valve intercommunication on the first chamber has the dense water jar, first valve on the second chamber passes through the pipeline and produces water jar intercommunication, the multi-way valve on the third valve passes through the pipeline simultaneously with second valve and the dense water jar intercommunication on the first chamber.

As a further optimization of the scheme, the pretreatment tank is communicated with a container for storing the bactericide.

As a further optimization of the scheme, the pretreatment tank is also communicated with a container for storing the scale inhibitor.

The utility model has the following beneficial effects:

1. the DTRO membrane component is provided with a cylindrical membrane shell, a partition plate which is hermetically connected with the inner cavity of the membrane shell is arranged in the inner cavity of the cylindrical membrane shell, the inner cavity of the membrane shell is divided into at least two chambers by the partition plate, at least one DTRO membrane body is arranged in each chamber, and a sealing piece with a valve group is arranged at the opening end of each chamber. And (3) introducing the landfill leachate stock solution to be treated into the DTRO membrane body arranged in the membrane shell cavity by using the second valve, wherein the landfill leachate stock solution entering the membrane shell is subjected to reverse osmosis by the DTRO membrane body to form concentrated solution and a low-concentration water source under a high-pressure state, and the low-concentration water and the concentrated solution are discharged through the first valve and the third valve respectively. By the method, the aim of separating redundant water in the landfill leachate stock solution is fulfilled. Meanwhile, the low-concentration water filtered from the landfill leachate stock solution is sent into the other chamber for secondary filtration through a second valve arranged on the other chamber by using a pipeline, so that the purpose of secondary treatment on the landfill leachate stock solution by using a DTRO membrane module is realized.

2. The two-stage DTRO process treatment system for the landfill leachate with the DTRO component is provided with the DTRO membrane component, the upstream of the DTRO membrane component is sequentially connected with the pretreatment tank and the regulating tank, the downstream of the DTRO membrane component is simultaneously connected with the concentrated water tank and the produced water tank, and the secondary filtration function of the second chamber in the DTRO membrane component is utilized, so that the purpose of carrying out secondary treatment on the landfill leachate by utilizing one DTRO membrane component is realized.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the cross-sectional structure 1-1 in FIG. 1;

FIG. 3 is an enlarged view of the portion A of FIG. 1;

FIG. 4 is an enlarged view of the portion B of FIG. 3;

FIG. 5 is a schematic diagram of a two-stage process system according to the present invention.

Description of the drawings: 1-columnar membrane shell, 2-partition board, 3-first chamber, 4-DTRO membrane body, 5-sealing piece, 6-valve group, 7-flow guiding plate, 8-flow guiding pipe, 9-hole, 10-sealing pad, 11-cavity, 12-DTRO membrane, 13-sealing plate, 14-flange sealing plate, 15-baffle groove, 16-connecting pipe, 17-connecting piece, 18-groove, 19-fixing piece, 20-first valve, 21-second valve, 22-third valve and 23-second chamber.

Detailed Description

The present invention will be described in detail and with reference to preferred embodiments thereof, but the present invention is not limited thereto.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

The terms "upper", "lower", "left", "right", "inner", "outer", and the like, refer to orientations or positional relationships based on those shown in the drawings, or those that are conventionally placed during use of the utility model, and are used only for convenience in describing and simplifying the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the terms "vertical" and the like do not require absolute perpendicularity between the components, but may be slightly inclined. Such as "vertical" merely means that the direction is relatively more vertical and does not mean that the structure must be perfectly vertical, but may be slightly inclined.

In the description of the present invention, it is also to be noted that the terms "disposed," "mounted," "connected," and the like are to be construed broadly unless otherwise specifically stated or limited. For example, the connection can be fixed, detachable or integrated; 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.

Example 1:

as shown in fig. 1 to 4, a DTRO membrane module includes a cylindrical membrane housing 1, a partition plate 2 sealingly connected to an inner cavity of the membrane housing 1 is disposed in the inner cavity of the membrane housing 1, the partition plate 2 divides the inner cavity of the membrane housing 1 into a first chamber 3 and at least one second chamber 23, DTRO membrane bodies 4 are disposed in the first chamber 3 and each of the second chambers 23, sealing members 5 are disposed at open ends of the first chamber 3 and the second chamber 23, a valve group 6 is disposed on each of the sealing members 5, and the valve group 6 includes a first valve 20 for discharging reverse osmosis water, a second valve 21 for supplying a stock solution into the DTRO membrane bodies, and a third valve 22 for discharging a concentrate.

In this embodiment, first, it is to be noted that the present invention is a structure to which the principle of reverse osmosis is applied, and therefore, the DTRO membrane module disclosed in the present invention needs to be resistant to high pressure when in use.

In the present embodiment, as shown in fig. 1, the membrane module is obtained by providing a cylindrical membrane shell 1, providing a partition plate 2 in the inner cavity of the cylindrical membrane shell 1, and hermetically connecting the inner cavity of the membrane shell with the inner cavity of the cylindrical membrane shell, dividing the inner cavity of the membrane shell into at least two chambers by the partition plate 2, and providing at least one DTRO membrane body 4 in each chamber, and providing a sealing member 5 with a valve group 6 at the open end of each chamber. And (3) introducing the landfill leachate stock solution to be treated into the DTRO membrane body 4 arranged in the membrane shell cavity by using the second valve 21, wherein the landfill leachate stock solution entering the membrane shell is subjected to reverse osmosis by the DTRO membrane body 4 to form concentrated solution and a low-concentration water source under a high-pressure state, and the low-concentration water and the concentrated solution are discharged through the first valve 20 and the third valve 22 respectively. By the method, the aim of separating redundant water in the landfill leachate stock solution is fulfilled.

It is particularly clear and to be noted that in this embodiment, the membrane shell is made of a material that is resistant to high pressure. As an example, the high pressure resistant material includes, but is not limited to, the following materials: steel, glass fiber reinforced plastic, and Pamm (PASMO) high-performance special materials. It can be further explained that, as a preferred embodiment, in this embodiment, a Pamm (PASMO) high performance special material may be preferably used, so that if the membrane shell is made of the Pamm (PASMO) high performance special material, the filtration environment inside the membrane shell can be observed in real time by using the high light transmittance of the Pamm (PASMO) high performance special material itself when the membrane shell is actually used, so as to clearly judge the reverse osmosis effect of the DTRO membrane 4 in the present invention.

In order to more clearly illustrate the utility model, as a further optimization of the above scheme, the DTRO membrane body 4 includes a flow guide disc 7, a flow guide pipe 8 is arranged on an axial center line of the flow guide disc 7, a plurality of holes 9 are arranged on a pipe wall of the flow guide pipe 8, a plurality of cavities 11 are arranged in the flow guide disc 7, a DTRO membrane 12 is arranged in each cavity 11, the DTRO membrane 12 divides the cavity 11 into a stock solution cavity and a drainage cavity communicated with the holes 9, the DTRO membrane 12 is located on one side of the stock solution cavity and is in sealing contact with a sealing gasket 10, and a sealing plate 13 is arranged above one side of the drainage cavity.

As a preferred embodiment, in this embodiment, as shown in fig. 3 and 4, the DTRO membrane 4 is provided with a diversion plate 7, a plurality of cavities 11 are provided in the diversion plate 7, then at least one DTRO membrane 12 is respectively disposed in each cavity 11, the cavity 11 of the diversion plate 7 is divided into a stock solution cavity and a filter cavity by the DTRO membrane 12, a diversion pipe 8 is disposed at the center of the diversion plate 7, a plurality of holes 9 are provided on the pipe wall of the diversion pipe 8, the holes 9 are communicated with the filter cavity, and a sealing gasket 10 is disposed on the pipe wall of the diversion pipe 8 at one side of the stock solution cavity, so that the present invention finally realizes the separation of water in the landfill leachate stock solution supplied to the DTRO membrane 4, and finally obtains a high concentration concentrated solution and purified water.

As a further optimization of the above solution, the sealing member 5 comprises a flange sealing disk 14, each open end of the inner cavity of the membrane shell is fixedly provided with one flange sealing disk 14, the flange sealing disc 14 is provided with a baffle groove 15, the baffle groove 15 divides the inner cavity of the membrane shell into a filter cavity and a liquid discharge cavity, the top end of the baffle groove 15 contacts with one end of the deflector 7, the central position of the flange sealing disc 14 is provided with a connecting pipe 16, one end of the connecting pipe 16 is communicated with the draft tube 8, the other end of the connecting pipe penetrates through the flange sealing disc 14 and is arranged on the outer side of the membrane shell, a water outlet is arranged on the connecting pipe 16 positioned on the outer side of the flange sealing disc 14, the flange sealing disc 14 is provided with at least one liquid inlet communicated with the filter cavity and at least one liquid outlet communicated with the liquid discharge cavity in a sealing manner.

In the present embodiment, as shown in fig. 3 and 4, the sealing member 5 is provided with a flange sealing disc 14, the flange sealing disc 14 is fixedly arranged at each open end of the inner cavity of the membrane shell, and the valve group 6 is arranged on the flange sealing disc 14, so that the present invention realizes that an independent space capable of performing reverse osmosis is provided for the landfill leachate stock solution needing reverse osmosis, and further realizes the purpose of reverse osmosis. Meanwhile, a baffle groove 15 is arranged on the flange sealing disc 14, the inner cavity of the membrane shell is divided into a filter cavity and a liquid discharge cavity by the baffle groove 15, and the raw liquid of the landfill leachate is sent into the filter cavity from the liquid inlet, filtered by the DTRO membrane body 4, flows into the liquid discharge cavity and is finally discharged from the liquid outlet. In addition, put at flange seal dish 14's central point and set up a connecting pipe 16 to let connecting pipe 16 and honeycomb duct 8 seal the intercommunication, and then make the pure water in the honeycomb duct 8 can directly discharge from connecting pipe 16, avoided because of the defect that the concentration of the concentrate or the landfill leachate stoste that pure water and concentrate or landfill leachate stoste mix and lead to reduces.

As a further optimization of the above solution, a connector 17 for fixing the DTRO membrane module is further provided outside the water outlet of the connection pipe 16.

In a preferred embodiment, as shown in fig. 3, a connector 17 for fixing the DTRO membrane module is disposed outside the water outlet of the connecting pipe 16, so that the DTRO membrane module can be fixed in a use area or can be directly fixed with other devices.

It should be particularly clear and noted that, as a preferred embodiment, in the present embodiment, the connecting member 17 includes, but is not limited to, the following structures or components: a screw structure with a nut, a clip structure with a projection or a groove 18, etc., and as a preferred embodiment, the connecting member 17 described in this embodiment preferably employs a screw structure with a nut.

As a further optimization of the above scheme, at least one groove 18 is arranged on the inner wall of the open end of the membrane shell, and at least one fixing piece 19 in interference fit with the groove 18 is further arranged on the side surface of the disk body of the flange sealing disk 14.

In the present embodiment, as shown in fig. 3, a groove 18 is formed on the inner wall of the open end of the membrane casing, and a fixing member 19 that is in interference fit with the groove 18 is formed on the side surface of the disk body of the flange sealing disk 14, so that the present invention can resist stronger pressure during use through the interference fit between the fixing member 19 and the groove 18, thereby further enhancing the use effect of the present invention.

It should be particularly clear and explained that, as a preferred embodiment, in the present embodiment, the fixing member 19 may be, but is not limited to, the following examples: projections, pins, threaded screws, etc. To further enhance the compression resistance of the present invention, the material used for the retainer 19 and the flange seal disk 14 in this embodiment is the same as that used to make the membrane housing as previously exemplified.

As a further optimization of the above solution, the first valve 20 is disposed on the water outlet, the second valve 21 is disposed on the liquid inlet, and the third valve 22 is disposed on the liquid outlet.

As a further optimization of the above scheme, a three-way valve is arranged on the second valve 21 of the first chamber 3, the first valve 20 on the first chamber 3 is communicated with the second valve 21 of the second chamber 23 through a pipeline, a multi-way valve is arranged on the third valve 22 of the second chamber 23, and one of outlets of the multi-way valve is communicated with the three-way valve on the second valve 21 of the first chamber 3.

In a preferred embodiment, as shown in fig. 1, in this embodiment, the above process is adopted, and water with low concentration filtered from the landfill leachate stock solution is sent to another chamber for secondary filtration through a second valve 21 arranged on another chamber by using a pipeline, so that the utility model achieves the purpose of secondary treatment of the landfill leachate stock solution by using a DTRO membrane module.

It should be noted that, specifically, the selection of the multi-way valve is determined according to the total number of the first chambers and the second chambers, for example, the total number of the first chambers and the second chambers is 2, the multi-way valve is a three-way valve, the total number of the first chambers and the second chambers is 3, and the multi-way valve is a four-way valve. In a preferred embodiment, the multi-way valve is a three-way valve or a four-way valve.

As shown in fig. 1 to 4, the work flow of the DTRO membrane module of the present invention is as follows: firstly, the raw garbage percolate enters the diversion disc 7 in the filter chamber through the second valve 21 of the first chamber 3 and flows through the DTRO membrane, the drainage chamber, the holes 9, the diversion pipe 8 and the drainage pipe in sequence through the filtration chamber, the garbage percolate raw liquid enters the diversion disc 7 under high pressure, finally flows out through the first valve 20 arranged on the connecting pipe 16, the water flowing out through the first valve 20 is sent into the DTRO membrane 4 in the second chamber 23 from the second valve 21 of the second chamber 23 through the pipeline, the water repeats the process in the DTRO membrane 4 of the second chamber 23, and finally pure water is obtained, and finally the pure water is discharged to the external environment from the first valve 20 of the second chamber 23. Meanwhile, the landfill leachate stock solution in the first chamber 3 is concentrated into concentrated solution after being concentrated in the first chamber 3, and the concentrated solution is finally discharged through the third valve 22 in the first chamber 3. While a part of the concentrated liquid generated in the second chamber 23 is discharged to the first chamber 3 for re-concentration, and another part of the concentrated liquid discharged from the first chamber 3 is mixed.

Example 2

As a specific application of the above structure, the present invention provides an example including the above structure, and the specific implementation is as follows:

the utility model provides a two-stage DTRO process treatment system of landfill leachate with the aforesaid DTRO membrane module, includes at least one DTRO membrane module, the DTRO membrane module has and only has a valve to pass through the pipeline intercommunication and has the preliminary treatment pond, the upstream intercommunication in preliminary treatment pond has the equalizing basin, the third valve 22 intercommunication on the first chamber 3 has the dense water jar, first valve 20 on the second chamber 23 passes through the pipeline and produces water tank intercommunication, the multi-way valve on the third valve 22 passes through the pipeline simultaneously with second valve 21 and the dense water tank intercommunication on the first chamber 3.

In this embodiment, as shown in fig. 5, a landfill leachate raw solution in a regulating reservoir is sent to the regulating reservoir for pretreatment, the pretreated landfill leachate treatment solution is sent to the DTRO membrane module of the present invention at a high pressure, and the DTRO membrane module is used for secondary treatment, so that the present invention achieves the purpose that the landfill leachate treatment solution can be subjected to secondary treatment by using one DTRO membrane module to obtain a concentrated solution and water. The defect that at least two conventional DTRO membrane assemblies are required to be arranged when the landfill leachate stock solution is subjected to secondary treatment in the prior art is overcome.

In the present embodiment, as shown in fig. 4, during the pretreatment, the bactericide is directly added into the pretreatment tank, so that the bactericide can effectively kill bacteria, germs, etc. existing in the raw liquid when the raw liquid of the landfill leachate is treated. The safety performance of the filtered water is improved.

It is specifically noted and explained that in the present embodiment, the germicides include, but are not limited to, the following examples: inorganic bactericides (copper sulfate, mercuric chloride, lime bordeaux mixture, etc.), organic sulfur bactericides (ziram, zineb, mancozeb, etc.), organic phosphorus and arsenic bactericides (fosetyl-aluminum, tolclofos-methyl, etc.), substituted benzene bactericides (chlorothalonil, fenaminosulf, etc.), etc.

As a preferable embodiment, in this embodiment, the scale inhibitor is added into the pretreatment tank, so that the purpose of treating the insoluble inorganic salt in the landfill leachate stock solution and preventing or interfering with the insoluble inorganic salt is achieved when the scale inhibitor is used, the risk of early blocking of the DTRO membrane module by the stock solution in the reverse osmosis process is further effectively reduced, and the use effect of the scale inhibitor is further improved.

It should be particularly clear and explained that, in the present embodiment, the scale inhibitor includes, but is not limited to, the following examples: ATMP, DTPMP, HEDP, etc.

The utility model divides the percolate into a concentrated solution (with extremely high pollutant content) and clear water (with a small amount of salt) through a disc tube type reverse osmosis membrane (DTRO), has small occupied area, high automation degree and lower requirement on operation managers. The secondary DTRO treatment effect is better.

Through the scheme, the upstream of the DTRO membrane module is sequentially connected with the pretreatment tank and the regulating tank, the downstream of the DTRO membrane module is simultaneously connected with the concentrated water tank and the water production tank, and the secondary filtration function of the second chamber 23 in the DTRO membrane module is utilized, so that the purpose of performing secondary treatment on the landfill leachate by utilizing one DTRO membrane module is realized.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A DTRO membrane module, characterized in that: including cylindrical membrane shell (1), be provided with in the inner chamber of membrane shell (1) with membrane shell (1) inner chamber sealing connection's baffle (2), baffle (2) will the inner chamber of membrane shell (1) is cut apart into a first cavity (3) and at least one second cavity (23), first cavity (3) and every all be provided with DTRO membrane body (4) in second cavity (23), the open end of first cavity (3) and second cavity (23) all is provided with sealing member (5), every all be provided with valve group (6) on sealing member (5), valve group (6) are including first valve (20) that are used for discharging reverse osmosis water, be used for to the second valve (21) of DTRO membrane internal supply stoste and be used for discharging third valve (22) of concentrate.

2. The DTRO membrane module of claim 1, wherein: DTRO diaphragm body (4) are including flow guide disc (7), set up honeycomb duct (8) on the axial direction line of flow guide disc (7), be provided with a plurality of holes (9) on the pipe wall of honeycomb duct (8), be provided with a plurality of cavitys (11) in flow guide disc (7), each all be provided with DTRO diaphragm (12) in cavity (11), DTRO diaphragm (12) cut apart cavity (11) for stoste chamber and with the drainage chamber of hole (9) intercommunication, one side that DTRO diaphragm (12) are located stoste chamber is sealed with sealed pad (10) and is contacted, and the top that is located drainage chamber one side is provided with closing plate (13).

3. The DTRO membrane module of claim 2, wherein: each open end of membrane shell (1) inner chamber is fixed respectively and is provided with a flange seal dish (14), be provided with a manger plate (15) on flange seal dish (14), manger plate (15) are kept away from the one end of flange seal dish (14) with the one end contact of guiding disk (7), manger plate (15) will the inner chamber of membrane shell (1) divide into filter chamber and flowing back chamber, the central point of flange seal dish (14) puts and is provided with connecting pipe (16), the one end of connecting pipe (16) with honeycomb duct (8) intercommunication, the other end runs through flange seal dish (14) and place in the outside of membrane shell (1), be located the flange seal dish (14) outside be provided with the outlet on connecting pipe (16), be provided with on flange seal dish (14) at least one with the inlet of filter chamber intercommunication, And at least one liquid outlet which is hermetically communicated with the liquid discharge cavity.

4. The DTRO membrane module of claim 3, wherein: and a connecting piece (17) for fixing the DTRO membrane module is also arranged on the outer side of the connecting pipe (16) provided with the water outlet.

5. The DTRO membrane module of claim 3, wherein: be provided with at least one recess (18) on the inner wall of membrane shell (1) open end, still be provided with on the side of flange sealed dish (14) disk body at least one with recess (18) interference fit's mounting (19).

6. The DTRO membrane module of claim 3, wherein: the first valve (20) is arranged on the water outlet, the second valve (21) is arranged on the liquid inlet, and the third valve (22) is arranged on the liquid outlet.

7. The DTRO membrane module of claim 6, wherein: be provided with a three-way valve on second valve (21) of first cavity (3), first valve (20) on first cavity (3) and second valve (21) intercommunication of second cavity (23), be provided with a multi-way valve on third valve (22) of second cavity (23), one of them export of multi-way valve with the three-way valve intercommunication on second valve (21) of first cavity (3).

8. A landfill leachate two-stage DTRO process treatment system having the DTRO membrane module of any of claims 1-7, wherein: including at least one DTRO membrane module, the DTRO membrane module has and only has a valve to have the preliminary treatment pond through the pipeline intercommunication, the upstream intercommunication in preliminary treatment pond has the equalizing basin, third valve (22) intercommunication on first cavity (3) has the dense water jar, first valve (20) on second cavity (23) pass through the pipeline and produce water jar intercommunication, the multi-way valve on third valve (22) pass through the pipeline simultaneously with second valve (21) and the dense water jar intercommunication on first cavity (3).

9. The landfill leachate two-stage DTRO process treatment system of claim 8, wherein: the pretreatment tank is communicated with a container for storing the bactericide.

10. The landfill leachate two-stage DTRO process treatment system of claim 8, wherein: the pretreatment tank is also communicated with a container for storing scale inhibitor.